include vnet.am
include vpp.am
include vpp-api-test.am
+include uri.am
SUBDIRS += plugins
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/ip/ip6_hop_by_hop.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/flow/ipfix_packet.h>
#include <vppinfra/pool.h>
#include <vnet/ip/ip.h>
#include <vnet/plugin/plugin.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <ioam/ipfixcollector/ipfixcollector.h>
ipfix_collector_main_t ipfix_collector_main;
#include <vppinfra/hash.h>
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/vxlan-gpe/vxlan_gpe.h>
#include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam_packet.h>
ip4_header_t, dst_address);
ip0->checksum = ip_csum_fold (sum0);
- old_dst_port0 = tcp0->ports.dst;
+ old_dst_port0 = tcp0->dst;
if (PREDICT_TRUE(new_dst_port0 != old_dst_port0))
{
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- tcp0->ports.dst = new_dst_port0;
+ tcp0->dst = new_dst_port0;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
ip4_header_t, dst_address);
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.src;
- tcp0->ports.src = s0->out2in.port;
- new_port0 = tcp0->ports.src;
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
{
- old_port1 = tcp1->ports.src;
- tcp1->ports.src = s1->out2in.port;
- new_port1 = tcp1->ports.src;
+ old_port1 = tcp1->src_port;
+ tcp1->src_port = s1->out2in.port;
+ new_port1 = tcp1->src_port;
sum1 = tcp1->checksum;
sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.src;
- tcp0->ports.src = s0->out2in.port;
- new_port0 = tcp0->ports.src;
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
{
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.src;
- tcp0->ports.src = new_port0;
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = new_port0;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
#include <vnet/handoff.h>
#include <vnet/ip/ip.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/ip4_fib.h>
#include <snat/snat.h>
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.dst;
- tcp0->ports.dst = s0->in2out.port;
- new_port0 = tcp0->ports.dst;
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = s0->in2out.port;
+ new_port0 = tcp0->dst_port;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
{
- old_port1 = tcp1->ports.dst;
- tcp1->ports.dst = s1->in2out.port;
- new_port1 = tcp1->ports.dst;
+ old_port1 = tcp1->dst_port;
+ tcp1->dst_port = s1->in2out.port;
+ new_port1 = tcp1->dst_port;
sum1 = tcp1->checksum;
sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.dst;
- tcp0->ports.dst = s0->in2out.port;
- new_port0 = tcp0->ports.dst;
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = s0->in2out.port;
+ new_port0 = tcp0->dst_port;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
{
if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
{
- old_port0 = tcp0->ports.dst;
- tcp0->ports.dst = new_port0;
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = new_port0;
sum0 = tcp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+loop create
+set int ip address loop0 192.168.1.1/8
+set int state loop0 up
+
packet-generator new {
name x
- limit 1
+ limit 2048
node ip4-input
- size 64-64
+ size 100-100
+ interface loop0
no-recycle
data {
- TCP: 1.2.3.4 -> 5.6.7.8
- TCP: 1234 -> 5678
+ TCP: 192.168.1.2 -> 192.168.1.1
+ TCP: 32415 -> 80
+ SYN
incrementing 100
}
}
-
-tr add pg-input 100
-ip route 5.6.7.8/32 via local
-ip route 1.2.3.4/32 via local
--- /dev/null
+loop create
+set int ip address loop0 192.168.1.1/8
+set int state loop0 up
+
+packet-generator new {
+ name udp
+ limit 512
+ rate 1e4
+ node ip4-input
+ size 100-100
+ interface loop0
+ no-recycle
+ data {
+ UDP: 192.168.1.2 - 192.168.2.255 -> 192.168.1.1
+ UDP: 4321 -> 1234
+ length 72
+ incrementing 100
+ }
+}
--- /dev/null
+#!/usr/bin/env bash
+
+function topo_setup
+{
+ ip netns add vppns1
+ ip link add veth_vpp1 type veth peer name vpp1
+ ip link set dev vpp1 up
+ ip link set dev veth_vpp1 up netns vppns1
+
+ ip netns exec vppns1 \
+ bash -c "
+ ip link set dev lo up
+ ip addr add 6.0.1.2/24 dev veth_vpp1
+ "
+
+ ethtool --offload vpp1 rx off tx off
+ ip netns exec vppns1 ethtool --offload veth_vpp1 rx off tx off
+
+}
+
+function topo_clean
+{
+ ip link del dev veth_vpp1 &> /dev/null
+ ip netns del vppns1 &> /dev/null
+}
+
+if [ "$1" == "clean" ] ; then
+ topo_clean
+ exit 0
+else
+ topo_setup
+fi
+
+# to test connectivity do:
+# sudo ip netns exec vppns1 telnet 6.0.1.1 1234
+# to push traffic to the server
+# dd if=/dev/zero bs=1024K count=512 | nc 6.0.1.1
+# to listen for incoming connection from vpp
+# nc -l 1234
--- /dev/null
+create host-interface name vpp1
+set int state host-vpp1 up
+set int ip address host-vpp1 6.0.1.1/24
+trace add af-packet-input 10
--- /dev/null
+loop create
+set int ip address loop0 10.0.0.1/32
+set int state loop0 up
+
+packet-generator new {
+ name udp
+ limit 512
+ rate 1e4
+ node ip4-input
+ size 100-100
+ interface loop0
+ no-recycle
+ data {
+ UDP: 192.168.1.2 - 192.168.2.255 -> 192.168.1.1
+ UDP: 4321 -> 1234
+ length 72
+ incrementing 100
+ }
+}
bin_PROGRAMS += svmtool svmdbtool
-nobase_include_HEADERS += svm/svm.h svm/ssvm.h svm/svmdb.h
+nobase_include_HEADERS += svm/svm.h svm/ssvm.h svm/svmdb.h \
+ svm/svm_fifo.h svm/svm_fifo_segment.h
lib_LTLIBRARIES += libsvm.la libsvmdb.la
+libsvm_la_SOURCES = svm/svm.c svm/ssvm.c svm/svm_fifo.c svm/svm_fifo_segment.c
libsvm_la_LIBADD = libvppinfra.la -lrt -lpthread
libsvm_la_DEPENDENCIES = libvppinfra.la
-libsvm_la_SOURCES = svm/svm.c svm/ssvm.c
svmtool_SOURCES = svm/svmtool.c
svmtool_LDADD = libsvm.la libvppinfra.la -lpthread -lrt
svmdbtool_SOURCES = svm/svmdbtool.c
svmdbtool_LDADD = libsvmdb.la libsvm.la libvppinfra.la -lpthread -lrt
+noinst_PROGRAMS += test_svm_fifo1
+test_svm_fifo1_SOURCES = svm/test_svm_fifo1.c
+test_svm_fifo1_LDADD = libsvm.la libvppinfra.la -lpthread -lrt
+test_svm_fifo1_LDFLAGS = -static
+
# vi:syntax=automake
return 0;
}
+void
+ssvm_delete (ssvm_private_t * ssvm)
+{
+ u8 *fn;
+
+ fn = format (0, "/dev/shm/%s%c", ssvm->name, 0);
+
+ /* Throw away the backing file */
+ if (unlink ((char *) fn) < 0)
+ clib_unix_warning ("unlink segment '%s'", ssvm->name);
+
+ munmap ((void *) ssvm->requested_va, ssvm->ssvm_size);
+ vec_free (fn);
+}
+
+
/*
* fd.io coding-style-patch-verification: ON
*
#include <vppinfra/pool.h>
#include <vppinfra/format.h>
-#define MMAP_PAGESIZE (4<<10)
+#ifndef MMAP_PAGESIZE
+#define MMAP_PAGESIZE (clib_mem_get_page_size())
+#endif
+
#define SSVM_N_OPAQUE 7
typedef struct
}
#define foreach_ssvm_api_error \
-_(NO_NAME, "No shared segment name", -10) \
-_(NO_SIZE, "Size not set (master)", -11) \
-_(CREATE_FAILURE, "Create failed", -12) \
-_(SET_SIZE, "Set size failed", -13) \
-_(MMAP, "mmap failed", -14) \
-_(SLAVE_TIMEOUT, "Slave map timeout", -15)
+_(NO_NAME, "No shared segment name", -100) \
+_(NO_SIZE, "Size not set (master)", -101) \
+_(CREATE_FAILURE, "Create failed", -102) \
+_(SET_SIZE, "Set size failed", -103) \
+_(MMAP, "mmap failed", -104) \
+_(SLAVE_TIMEOUT, "Slave map timeout", -105)
typedef enum
{
int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index);
int ssvm_slave_init (ssvm_private_t * ssvm, int timeout_in_seconds);
+void ssvm_delete (ssvm_private_t * ssvm);
#endif /* __included_ssvm_h__ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "svm_fifo.h"
+
+/** create an svm fifo, in the current heap. Fails vs blow up the process */
+svm_fifo_t *
+svm_fifo_create (u32 data_size_in_bytes)
+{
+ svm_fifo_t *f;
+ pthread_mutexattr_t attr;
+ pthread_condattr_t cattr;
+
+ f = clib_mem_alloc_aligned_or_null (sizeof (*f) + data_size_in_bytes,
+ CLIB_CACHE_LINE_BYTES);
+ if (f == 0)
+ return 0;
+
+ memset (f, 0, sizeof (*f) + data_size_in_bytes);
+ f->nitems = data_size_in_bytes;
+ f->ooos_list_head = OOO_SEGMENT_INVALID_INDEX;
+
+ memset (&attr, 0, sizeof (attr));
+ memset (&cattr, 0, sizeof (cattr));
+
+ if (pthread_mutexattr_init (&attr))
+ clib_unix_warning ("mutexattr_init");
+ if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED))
+ clib_unix_warning ("pthread_mutexattr_setpshared");
+ if (pthread_mutex_init (&f->mutex, &attr))
+ clib_unix_warning ("mutex_init");
+ if (pthread_mutexattr_destroy (&attr))
+ clib_unix_warning ("mutexattr_destroy");
+ if (pthread_condattr_init (&cattr))
+ clib_unix_warning ("condattr_init");
+ if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED))
+ clib_unix_warning ("condattr_setpshared");
+ if (pthread_cond_init (&f->condvar, &cattr))
+ clib_unix_warning ("cond_init1");
+ if (pthread_condattr_destroy (&cattr))
+ clib_unix_warning ("cond_init2");
+
+ return (f);
+}
+
+always_inline ooo_segment_t *
+ooo_segment_new (svm_fifo_t * f, u32 start, u32 length)
+{
+ ooo_segment_t *s;
+
+ pool_get (f->ooo_segments, s);
+
+ s->fifo_position = start;
+ s->length = length;
+
+ s->prev = s->next = OOO_SEGMENT_INVALID_INDEX;
+
+ return s;
+}
+
+always_inline void
+ooo_segment_del (svm_fifo_t * f, u32 index)
+{
+ ooo_segment_t *cur, *prev = 0, *next = 0;
+ cur = pool_elt_at_index (f->ooo_segments, index);
+
+ if (cur->next != OOO_SEGMENT_INVALID_INDEX)
+ {
+ next = pool_elt_at_index (f->ooo_segments, cur->next);
+ next->prev = cur->prev;
+ }
+
+ if (cur->prev != OOO_SEGMENT_INVALID_INDEX)
+ {
+ prev = pool_elt_at_index (f->ooo_segments, cur->prev);
+ prev->next = cur->next;
+ }
+ else
+ {
+ f->ooos_list_head = cur->next;
+ }
+
+ pool_put (f->ooo_segments, cur);
+}
+
+/**
+ * Add segment to fifo's out-of-order segment list. Takes care of merging
+ * adjacent segments and removing overlapping ones.
+ */
+static void
+ooo_segment_add (svm_fifo_t * f, u32 offset, u32 length)
+{
+ ooo_segment_t *s, *new_s, *prev, *next, *it;
+ u32 new_index, position, end_offset, s_sof, s_eof, s_index;
+
+ position = (f->tail + offset) % f->nitems;
+ end_offset = offset + length;
+
+ if (f->ooos_list_head == OOO_SEGMENT_INVALID_INDEX)
+ {
+ s = ooo_segment_new (f, position, length);
+ f->ooos_list_head = s - f->ooo_segments;
+ f->ooos_newest = f->ooos_list_head;
+ return;
+ }
+
+ /* Find first segment that starts after new segment */
+ s = pool_elt_at_index (f->ooo_segments, f->ooos_list_head);
+ while (s->next != OOO_SEGMENT_INVALID_INDEX
+ && ooo_segment_offset (f, s) <= offset)
+ s = pool_elt_at_index (f->ooo_segments, s->next);
+
+ s_index = s - f->ooo_segments;
+ s_sof = ooo_segment_offset (f, s);
+ s_eof = ooo_segment_end_offset (f, s);
+
+ /* No overlap, add before current segment */
+ if (end_offset < s_sof)
+ {
+ new_s = ooo_segment_new (f, position, length);
+ new_index = new_s - f->ooo_segments;
+
+ /* Pool might've moved, get segment again */
+ s = pool_elt_at_index (f->ooo_segments, s_index);
+
+ if (s->prev != OOO_SEGMENT_INVALID_INDEX)
+ {
+ new_s->prev = s->prev;
+
+ prev = pool_elt_at_index (f->ooo_segments, new_s->prev);
+ prev->next = new_index;
+ }
+ else
+ {
+ /* New head */
+ f->ooos_list_head = new_index;
+ }
+
+ new_s->next = s - f->ooo_segments;
+ s->prev = new_index;
+ f->ooos_newest = new_index;
+ return;
+ }
+ /* No overlap, add after current segment */
+ else if (s_eof < offset)
+ {
+ new_s = ooo_segment_new (f, position, length);
+ new_index = new_s - f->ooo_segments;
+
+ /* Pool might've moved, get segment again */
+ s = pool_elt_at_index (f->ooo_segments, s_index);
+
+ if (s->next != OOO_SEGMENT_INVALID_INDEX)
+ {
+ new_s->next = s->next;
+
+ next = pool_elt_at_index (f->ooo_segments, new_s->next);
+ next->prev = new_index;
+ }
+
+ new_s->prev = s - f->ooo_segments;
+ s->next = new_index;
+ f->ooos_newest = new_index;
+
+ return;
+ }
+
+ /*
+ * Merge needed
+ */
+
+ /* Merge at head */
+ if (offset <= s_sof)
+ {
+ /* If we have a previous, check if we overlap */
+ if (s->prev != OOO_SEGMENT_INVALID_INDEX)
+ {
+ prev = pool_elt_at_index (f->ooo_segments, s->prev);
+
+ /* New segment merges prev and current. Remove previous and
+ * update position of current. */
+ if (ooo_segment_end_offset (f, prev) >= offset)
+ {
+ s->fifo_position = prev->fifo_position;
+ s->length = s_eof - ooo_segment_offset (f, prev);
+ ooo_segment_del (f, s->prev);
+ }
+ }
+ else
+ {
+ s->fifo_position = position;
+ s->length = s_eof - ooo_segment_offset (f, s);
+ }
+
+ /* The new segment's tail may cover multiple smaller ones */
+ if (s_eof < end_offset)
+ {
+ /* Remove segments completely covered */
+ it = (s->next != OOO_SEGMENT_INVALID_INDEX) ?
+ pool_elt_at_index (f->ooo_segments, s->next) : 0;
+ while (it && ooo_segment_end_offset (f, it) < end_offset)
+ {
+ next = (it->next != OOO_SEGMENT_INVALID_INDEX) ?
+ pool_elt_at_index (f->ooo_segments, it->next) : 0;
+ ooo_segment_del (f, it - f->ooo_segments);
+ it = next;
+ }
+
+ /* Update length. Segment's start might have changed. */
+ s->length = end_offset - ooo_segment_offset (f, s);
+
+ /* If partial overlap with last, merge */
+ if (it && ooo_segment_offset (f, it) < end_offset)
+ {
+ s->length +=
+ it->length - (ooo_segment_offset (f, it) - end_offset);
+ ooo_segment_del (f, it - f->ooo_segments);
+ }
+ }
+ }
+ /* Last but overlapping previous */
+ else if (s_eof <= end_offset)
+ {
+ s->length = end_offset - ooo_segment_offset (f, s);
+ }
+ /* New segment completely covered by current one */
+ else
+ {
+ /* Do Nothing */
+ }
+
+ /* Most recently updated segment */
+ f->ooos_newest = s - f->ooo_segments;
+}
+
+/**
+ * Removes segments that can now be enqueued because the fifo's tail has
+ * advanced. Returns the number of bytes added to tail.
+ */
+static int
+ooo_segment_try_collect (svm_fifo_t * f, u32 n_bytes_enqueued)
+{
+ ooo_segment_t *s;
+ u32 index, bytes = 0, diff;
+
+ s = pool_elt_at_index (f->ooo_segments, f->ooos_list_head);
+
+ /* If last tail update overlaps one/multiple ooo segments, remove them */
+ diff = (f->nitems + f->tail - s->fifo_position) % f->nitems;
+ while (0 < diff && diff < n_bytes_enqueued)
+ {
+ /* Segment end is beyond the tail. Advance tail and be done */
+ if (diff < s->length)
+ {
+ f->tail += s->length - diff;
+ f->tail %= f->nitems;
+ break;
+ }
+ /* If we have next go on */
+ else if (s->next != OOO_SEGMENT_INVALID_INDEX)
+ {
+ index = s - f->ooo_segments;
+ s = pool_elt_at_index (f->ooo_segments, s->next);
+ diff = (f->nitems + f->tail - s->fifo_position) % f->nitems;
+ ooo_segment_del (f, index);
+ }
+ /* End of search */
+ else
+ {
+ break;
+ }
+ }
+
+ /* If tail is adjacent to an ooo segment, 'consume' it */
+ if (diff == 0)
+ {
+ bytes = ((f->nitems - f->cursize) >= s->length) ? s->length :
+ f->nitems - f->cursize;
+
+ f->tail += bytes;
+ f->tail %= f->nitems;
+
+ ooo_segment_del (f, s - f->ooo_segments);
+ }
+
+ return bytes;
+}
+
+static int
+svm_fifo_enqueue_internal (svm_fifo_t * f,
+ int pid, u32 max_bytes, u8 * copy_from_here)
+{
+ u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
+ u32 cursize, nitems;
+
+ if (PREDICT_FALSE (f->cursize == f->nitems))
+ return -2; /* fifo stuffed */
+
+ /* read cursize, which can only decrease while we're working */
+ cursize = f->cursize;
+ nitems = f->nitems;
+
+ /* Number of bytes we're going to copy */
+ total_copy_bytes = (nitems - cursize) < max_bytes ?
+ (nitems - cursize) : max_bytes;
+
+ if (PREDICT_TRUE (copy_from_here != 0))
+ {
+ /* Number of bytes in first copy segment */
+ first_copy_bytes = ((nitems - f->tail) < total_copy_bytes)
+ ? (nitems - f->tail) : total_copy_bytes;
+
+ clib_memcpy (&f->data[f->tail], copy_from_here, first_copy_bytes);
+ f->tail += first_copy_bytes;
+ f->tail = (f->tail == nitems) ? 0 : f->tail;
+
+ /* Number of bytes in second copy segment, if any */
+ second_copy_bytes = total_copy_bytes - first_copy_bytes;
+ if (second_copy_bytes)
+ {
+ clib_memcpy (&f->data[f->tail], copy_from_here + first_copy_bytes,
+ second_copy_bytes);
+ f->tail += second_copy_bytes;
+ f->tail = (f->tail == nitems) ? 0 : f->tail;
+ }
+ }
+ else
+ {
+ /* Account for a zero-copy enqueue done elsewhere */
+ ASSERT (max_bytes <= (nitems - cursize));
+ f->tail += max_bytes;
+ f->tail = f->tail % nitems;
+ total_copy_bytes = max_bytes;
+ }
+
+ /* Any out-of-order segments to collect? */
+ if (PREDICT_FALSE (f->ooos_list_head != OOO_SEGMENT_INVALID_INDEX))
+ total_copy_bytes += ooo_segment_try_collect (f, total_copy_bytes);
+
+ /* Atomically increase the queue length */
+ __sync_fetch_and_add (&f->cursize, total_copy_bytes);
+
+ return (total_copy_bytes);
+}
+
+int
+svm_fifo_enqueue_nowait (svm_fifo_t * f,
+ int pid, u32 max_bytes, u8 * copy_from_here)
+{
+ return svm_fifo_enqueue_internal (f, pid, max_bytes, copy_from_here);
+}
+
+/** Enqueue a future segment.
+ * Two choices: either copies the entire segment, or copies nothing
+ * Returns 0 of the entire segment was copied
+ * Returns -1 if none of the segment was copied due to lack of space
+ */
+
+static int
+svm_fifo_enqueue_with_offset_internal2 (svm_fifo_t * f,
+ int pid,
+ u32 offset,
+ u32 required_bytes,
+ u8 * copy_from_here)
+{
+ u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
+ u32 cursize, nitems;
+ u32 tail_plus_offset;
+
+ ASSERT (offset > 0);
+
+ /* read cursize, which can only decrease while we're working */
+ cursize = f->cursize;
+ nitems = f->nitems;
+
+ /* Will this request fit? */
+ if ((required_bytes + offset) > (nitems - cursize))
+ return -1;
+
+ ooo_segment_add (f, offset, required_bytes);
+
+ /* Number of bytes we're going to copy */
+ total_copy_bytes = required_bytes;
+ tail_plus_offset = (f->tail + offset) % nitems;
+
+ /* Number of bytes in first copy segment */
+ first_copy_bytes = ((nitems - tail_plus_offset) < total_copy_bytes)
+ ? (nitems - tail_plus_offset) : total_copy_bytes;
+
+ clib_memcpy (&f->data[tail_plus_offset], copy_from_here, first_copy_bytes);
+
+ /* Number of bytes in second copy segment, if any */
+ second_copy_bytes = total_copy_bytes - first_copy_bytes;
+ if (second_copy_bytes)
+ {
+ tail_plus_offset += first_copy_bytes;
+ tail_plus_offset %= nitems;
+
+ ASSERT (tail_plus_offset == 0);
+
+ clib_memcpy (&f->data[tail_plus_offset],
+ copy_from_here + first_copy_bytes, second_copy_bytes);
+ }
+
+ return (0);
+}
+
+
+int
+svm_fifo_enqueue_with_offset (svm_fifo_t * f,
+ int pid,
+ u32 offset,
+ u32 required_bytes, u8 * copy_from_here)
+{
+ return svm_fifo_enqueue_with_offset_internal2
+ (f, pid, offset, required_bytes, copy_from_here);
+}
+
+
+static int
+svm_fifo_dequeue_internal2 (svm_fifo_t * f,
+ int pid, u32 max_bytes, u8 * copy_here)
+{
+ u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
+ u32 cursize, nitems;
+
+ if (PREDICT_FALSE (f->cursize == 0))
+ return -2; /* nothing in the fifo */
+
+ /* read cursize, which can only increase while we're working */
+ cursize = f->cursize;
+ nitems = f->nitems;
+
+ /* Number of bytes we're going to copy */
+ total_copy_bytes = (cursize < max_bytes) ? cursize : max_bytes;
+
+ if (PREDICT_TRUE (copy_here != 0))
+ {
+ /* Number of bytes in first copy segment */
+ first_copy_bytes = ((nitems - f->head) < total_copy_bytes)
+ ? (nitems - f->head) : total_copy_bytes;
+ clib_memcpy (copy_here, &f->data[f->head], first_copy_bytes);
+ f->head += first_copy_bytes;
+ f->head = (f->head == nitems) ? 0 : f->head;
+
+ /* Number of bytes in second copy segment, if any */
+ second_copy_bytes = total_copy_bytes - first_copy_bytes;
+ if (second_copy_bytes)
+ {
+ clib_memcpy (copy_here + first_copy_bytes,
+ &f->data[f->head], second_copy_bytes);
+ f->head += second_copy_bytes;
+ f->head = (f->head == nitems) ? 0 : f->head;
+ }
+ }
+ else
+ {
+ /* Account for a zero-copy dequeue done elsewhere */
+ ASSERT (max_bytes <= cursize);
+ f->head += max_bytes;
+ f->head = f->head % nitems;
+ cursize -= max_bytes;
+ total_copy_bytes = max_bytes;
+ }
+
+ __sync_fetch_and_sub (&f->cursize, total_copy_bytes);
+
+ return (total_copy_bytes);
+}
+
+int
+svm_fifo_dequeue_nowait (svm_fifo_t * f,
+ int pid, u32 max_bytes, u8 * copy_here)
+{
+ return svm_fifo_dequeue_internal2 (f, pid, max_bytes, copy_here);
+}
+
+int
+svm_fifo_peek (svm_fifo_t * f, int pid, u32 offset, u32 max_bytes,
+ u8 * copy_here)
+{
+ u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
+ u32 cursize, nitems;
+
+ if (PREDICT_FALSE (f->cursize == 0))
+ return -2; /* nothing in the fifo */
+
+ /* read cursize, which can only increase while we're working */
+ cursize = f->cursize;
+ nitems = f->nitems;
+
+ /* Number of bytes we're going to copy */
+ total_copy_bytes = (cursize < max_bytes) ? cursize : max_bytes;
+
+ if (PREDICT_TRUE (copy_here != 0))
+ {
+ /* Number of bytes in first copy segment */
+ first_copy_bytes =
+ ((nitems - f->head) < total_copy_bytes) ?
+ (nitems - f->head) : total_copy_bytes;
+ clib_memcpy (copy_here, &f->data[f->head], first_copy_bytes);
+
+ /* Number of bytes in second copy segment, if any */
+ second_copy_bytes = total_copy_bytes - first_copy_bytes;
+ if (second_copy_bytes)
+ {
+ clib_memcpy (copy_here + first_copy_bytes, &f->data[0],
+ second_copy_bytes);
+ }
+ }
+ return total_copy_bytes;
+}
+
+int
+svm_fifo_dequeue_drop (svm_fifo_t * f, int pid, u32 max_bytes)
+{
+ u32 total_drop_bytes, first_drop_bytes, second_drop_bytes;
+ u32 cursize, nitems;
+
+ if (PREDICT_FALSE (f->cursize == 0))
+ return -2; /* nothing in the fifo */
+
+ /* read cursize, which can only increase while we're working */
+ cursize = f->cursize;
+ nitems = f->nitems;
+
+ /* Number of bytes we're going to drop */
+ total_drop_bytes = (cursize < max_bytes) ? cursize : max_bytes;
+
+ /* Number of bytes in first copy segment */
+ first_drop_bytes =
+ ((nitems - f->head) < total_drop_bytes) ?
+ (nitems - f->head) : total_drop_bytes;
+ f->head += first_drop_bytes;
+ f->head = (f->head == nitems) ? 0 : f->head;
+
+ /* Number of bytes in second drop segment, if any */
+ second_drop_bytes = total_drop_bytes - first_drop_bytes;
+ if (second_drop_bytes)
+ {
+ f->head += second_drop_bytes;
+ f->head = (f->head == nitems) ? 0 : f->head;
+ }
+
+ __sync_fetch_and_sub (&f->cursize, total_drop_bytes);
+
+ return total_drop_bytes;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_ssvm_fifo_h__
+#define __included_ssvm_fifo_h__
+
+#include <vppinfra/clib.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/mheap.h>
+#include <vppinfra/heap.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/format.h>
+#include <pthread.h>
+
+typedef enum
+{
+ SVM_FIFO_TAG_NOT_HELD = 0,
+ SVM_FIFO_TAG_DEQUEUE,
+ SVM_FIFO_TAG_ENQUEUE,
+} svm_lock_tag_t;
+
+/** Out-of-order segment */
+typedef struct
+{
+ u32 next; /**< Next linked-list element pool index */
+ u32 prev; /**< Previous linked-list element pool index */
+
+ u32 fifo_position; /**< Start of segment, normalized*/
+ u32 length; /**< Length of segment */
+} ooo_segment_t;
+
+#define OOO_SEGMENT_INVALID_INDEX ((u32)~0)
+
+typedef struct
+{
+ pthread_mutex_t mutex; /* 8 bytes */
+ pthread_cond_t condvar; /* 8 bytes */
+ u32 owner_pid;
+ svm_lock_tag_t tag;
+ volatile u32 cursize;
+ u32 nitems;
+
+ /* Backpointers */
+ u32 server_session_index;
+ u32 client_session_index;
+ u8 server_thread_index;
+ u8 client_thread_index;
+ CLIB_CACHE_LINE_ALIGN_MARK (end_shared);
+ u32 head;
+ CLIB_CACHE_LINE_ALIGN_MARK (end_consumer);
+
+ /* producer */
+ u32 tail;
+
+ ooo_segment_t *ooo_segments; /**< Pool of ooo segments */
+ u32 ooos_list_head; /**< Head of out-of-order linked-list */
+ u32 ooos_newest; /**< Last segment to have been updated */
+
+ CLIB_CACHE_LINE_ALIGN_MARK (data);
+} svm_fifo_t;
+
+static inline int
+svm_fifo_lock (svm_fifo_t * f, u32 pid, u32 tag, int nowait)
+{
+ if (PREDICT_TRUE (nowait == 0))
+ pthread_mutex_lock (&f->mutex);
+ else
+ {
+ if (pthread_mutex_trylock (&f->mutex))
+ return -1;
+ }
+ f->owner_pid = pid;
+ f->tag = tag;
+ return 0;
+}
+
+static inline void
+svm_fifo_unlock (svm_fifo_t * f)
+{
+ f->owner_pid = 0;
+ f->tag = 0;
+ CLIB_MEMORY_BARRIER ();
+ pthread_mutex_unlock (&f->mutex);
+}
+
+static inline u32
+svm_fifo_max_dequeue (svm_fifo_t * f)
+{
+ return f->cursize;
+}
+
+static inline u32
+svm_fifo_max_enqueue (svm_fifo_t * f)
+{
+ return f->nitems - f->cursize;
+}
+
+static inline u8
+svm_fifo_has_ooo_data (svm_fifo_t * f)
+{
+ return f->ooos_list_head != OOO_SEGMENT_INVALID_INDEX;
+}
+
+svm_fifo_t *svm_fifo_create (u32 data_size_in_bytes);
+
+int svm_fifo_enqueue_nowait (svm_fifo_t * f, int pid, u32 max_bytes,
+ u8 * copy_from_here);
+
+int svm_fifo_enqueue_with_offset (svm_fifo_t * f, int pid,
+ u32 offset, u32 required_bytes,
+ u8 * copy_from_here);
+
+int svm_fifo_dequeue_nowait (svm_fifo_t * f, int pid, u32 max_bytes,
+ u8 * copy_here);
+
+int svm_fifo_peek (svm_fifo_t * f, int pid, u32 offset, u32 max_bytes,
+ u8 * copy_here);
+int svm_fifo_dequeue_drop (svm_fifo_t * f, int pid, u32 max_bytes);
+
+always_inline ooo_segment_t *
+svm_fifo_newest_ooo_segment (svm_fifo_t * f)
+{
+ return f->ooo_segments + f->ooos_newest;
+}
+
+always_inline u32
+ooo_segment_offset (svm_fifo_t * f, ooo_segment_t * s)
+{
+ return ((f->nitems + s->fifo_position - f->tail) % f->nitems);
+}
+
+always_inline u32
+ooo_segment_end_offset (svm_fifo_t * f, ooo_segment_t * s)
+{
+ return ((f->nitems + s->fifo_position + s->length - f->tail) % f->nitems);
+}
+
+#endif /* __included_ssvm_fifo_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <svm/svm_fifo_segment.h>
+
+svm_fifo_segment_main_t svm_fifo_segment_main;
+
+/** (master) create an svm fifo segment */
+int
+svm_fifo_segment_create (svm_fifo_segment_create_args_t * a)
+{
+ int rv;
+ svm_fifo_segment_private_t *s;
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_header_t *fsh;
+ void *oldheap;
+
+ /* Allocate a fresh segment */
+ pool_get (sm->segments, s);
+ memset (s, 0, sizeof (*s));
+
+ s->ssvm.ssvm_size = a->segment_size;
+ s->ssvm.i_am_master = 1;
+ s->ssvm.my_pid = getpid ();
+ s->ssvm.name = (u8 *) a->segment_name;
+ s->ssvm.requested_va = sm->next_baseva;
+
+ rv = ssvm_master_init (&s->ssvm, s - sm->segments);
+
+ if (rv)
+ {
+ _vec_len (s) = vec_len (s) - 1;
+ return (rv);
+ }
+
+ /* Note; requested_va updated due to seg base addr randomization */
+ sm->next_baseva = s->ssvm.requested_va + a->segment_size;
+
+ sh = s->ssvm.sh;
+ oldheap = ssvm_push_heap (sh);
+
+ /* Set up svm_fifo_segment shared header */
+ fsh = clib_mem_alloc (sizeof (*fsh));
+ memset (fsh, 0, sizeof (*fsh));
+ sh->opaque[0] = fsh;
+ s->h = fsh;
+ fsh->segment_name = format (0, "%s%c", a->segment_name, 0);
+
+ /* Avoid vec_add1(...) failure when adding a fifo, etc. */
+ vec_validate (fsh->fifos, 64);
+ _vec_len (fsh->fifos) = 0;
+
+ ssvm_pop_heap (oldheap);
+
+ sh->ready = 1;
+ a->new_segment_index = s - sm->segments;
+ return (0);
+}
+
+/** (slave) attach to an svm fifo segment */
+int
+svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a)
+{
+ int rv;
+ svm_fifo_segment_private_t *s;
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_header_t *fsh;
+
+ /* Allocate a fresh segment */
+ pool_get (sm->segments, s);
+
+ memset (s, 0, sizeof (*s));
+
+ s->ssvm.ssvm_size = a->segment_size;
+ s->ssvm.my_pid = getpid ();
+ s->ssvm.name = (u8 *) a->segment_name;
+ s->ssvm.requested_va = sm->next_baseva;
+
+ rv = ssvm_slave_init (&s->ssvm, sm->timeout_in_seconds);
+
+ if (rv)
+ {
+ _vec_len (s) = vec_len (s) - 1;
+ return (rv);
+ }
+
+ /* Fish the segment header */
+ sh = s->ssvm.sh;
+ fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+ s->h = fsh;
+
+ a->new_segment_index = s - sm->segments;
+ return (0);
+}
+
+void
+svm_fifo_segment_delete (svm_fifo_segment_private_t * s)
+{
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ ssvm_delete (&s->ssvm);
+ pool_put (sm->segments, s);
+}
+
+svm_fifo_t *
+svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
+ u32 data_size_in_bytes)
+{
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_header_t *fsh;
+ svm_fifo_t *f;
+ void *oldheap;
+
+ sh = s->ssvm.sh;
+ fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+ oldheap = ssvm_push_heap (sh);
+
+ /* Note: this can fail, in which case: create another segment */
+ f = svm_fifo_create (data_size_in_bytes);
+ if (f == 0)
+ {
+ ssvm_pop_heap (oldheap);
+ return (0);
+ }
+
+ vec_add1 (fsh->fifos, f);
+
+ ssvm_pop_heap (oldheap);
+ return (f);
+}
+
+void
+svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s, svm_fifo_t * f)
+{
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_header_t *fsh;
+ void *oldheap;
+ int i;
+
+ sh = s->ssvm.sh;
+ fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+ oldheap = ssvm_push_heap (sh);
+
+ for (i = 0; i < vec_len (fsh->fifos); i++)
+ {
+ if (fsh->fifos[i] == f)
+ {
+ vec_delete (fsh->fifos, 1, i);
+ goto found;
+ }
+ }
+ clib_warning ("fifo 0x%llx not found in fifo table...", f);
+
+found:
+ clib_mem_free (f);
+ ssvm_pop_heap (oldheap);
+}
+
+void
+svm_fifo_segment_init (u64 baseva, u32 timeout_in_seconds)
+{
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+
+ sm->next_baseva = baseva;
+ sm->timeout_in_seconds = timeout_in_seconds;
+}
+
+u32
+svm_fifo_segment_index (svm_fifo_segment_private_t * s)
+{
+ return s - svm_fifo_segment_main.segments;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_ssvm_fifo_segment_h__
+#define __included_ssvm_fifo_segment_h__
+
+#include "svm_fifo.h"
+#include "ssvm.h"
+
+typedef struct
+{
+ volatile svm_fifo_t **fifos;
+ u8 *segment_name;
+} svm_fifo_segment_header_t;
+
+typedef struct
+{
+ ssvm_private_t ssvm;
+ svm_fifo_segment_header_t *h;
+} svm_fifo_segment_private_t;
+
+typedef struct
+{
+ /** pool of segments */
+ svm_fifo_segment_private_t *segments;
+ /* Where to put the next one */
+ u64 next_baseva;
+ u32 timeout_in_seconds;
+} svm_fifo_segment_main_t;
+
+extern svm_fifo_segment_main_t svm_fifo_segment_main;
+
+typedef struct
+{
+ char *segment_name;
+ u32 segment_size;
+ u32 new_segment_index;
+} svm_fifo_segment_create_args_t;
+
+static inline svm_fifo_segment_private_t *
+svm_fifo_get_segment (u32 segment_index)
+{
+ svm_fifo_segment_main_t *ssm = &svm_fifo_segment_main;
+ return vec_elt_at_index (ssm->segments, segment_index);
+}
+
+#define foreach_ssvm_fifo_segment_api_error \
+_(OUT_OF_SPACE, "Out of space in segment", -200)
+
+typedef enum
+{
+#define _(n,s,c) SSVM_FIFO_SEGMENT_API_ERROR_##n = c,
+ foreach_ssvm_fifo_segment_api_error
+#undef _
+} ssvm_fifo_segment_api_error_enum_t;
+
+int svm_fifo_segment_create (svm_fifo_segment_create_args_t * a);
+int svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a);
+void svm_fifo_segment_delete (svm_fifo_segment_private_t * s);
+
+svm_fifo_t *svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s,
+ u32 data_size_in_bytes);
+void svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s,
+ svm_fifo_t * f);
+
+void svm_fifo_segment_init (u64 baseva, u32 timeout_in_seconds);
+
+u32 svm_fifo_segment_index (svm_fifo_segment_private_t * s);
+
+#endif /* __included_ssvm_fifo_segment_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "svm_fifo_segment.h"
+
+clib_error_t *
+hello_world (int verbose)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ svm_fifo_segment_private_t *sp;
+ svm_fifo_t *f;
+ int rv;
+ u8 *test_data;
+ u8 *retrieved_data = 0;
+ clib_error_t *error = 0;
+ int pid = getpid ();
+
+ memset (a, 0, sizeof (*a));
+
+ a->segment_name = "fifo-test1";
+ a->segment_size = 256 << 10;
+
+ rv = svm_fifo_segment_create (a);
+
+ if (rv)
+ return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);
+
+ sp = svm_fifo_get_segment (a->new_segment_index);
+
+ f = svm_fifo_segment_alloc_fifo (sp, 4096);
+
+ if (f == 0)
+ return clib_error_return (0, "svm_fifo_segment_alloc_fifo failed");
+
+ test_data = format (0, "Hello world%c", 0);
+ vec_validate (retrieved_data, vec_len (test_data) - 1);
+
+ while (svm_fifo_max_enqueue (f) >= vec_len (test_data))
+ svm_fifo_enqueue_nowait (f, pid, vec_len (test_data), test_data);
+
+ while (svm_fifo_max_dequeue (f) >= vec_len (test_data))
+ svm_fifo_dequeue_nowait (f, pid, vec_len (retrieved_data),
+ retrieved_data);
+
+ while (svm_fifo_max_enqueue (f) >= vec_len (test_data))
+ svm_fifo_enqueue_nowait (f, pid, vec_len (test_data), test_data);
+
+ while (svm_fifo_max_dequeue (f) >= vec_len (test_data))
+ svm_fifo_dequeue_nowait (f, pid, vec_len (retrieved_data),
+ retrieved_data);
+
+ if (!memcmp (retrieved_data, test_data, vec_len (test_data)))
+ error = clib_error_return (0, "data test OK, got '%s'", retrieved_data);
+ else
+ error = clib_error_return (0, "data test FAIL!");
+
+ svm_fifo_segment_free_fifo (sp, f);
+
+ return error;
+}
+
+clib_error_t *
+master (int verbose)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ svm_fifo_segment_private_t *sp;
+ svm_fifo_t *f;
+ int rv;
+ u8 *test_data;
+ u8 *retrieved_data = 0;
+ int i;
+ int pid = getpid ();
+
+ memset (a, 0, sizeof (*a));
+
+ a->segment_name = "fifo-test1";
+ a->segment_size = 256 << 10;
+
+ rv = svm_fifo_segment_create (a);
+
+ if (rv)
+ return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);
+
+ sp = svm_fifo_get_segment (a->new_segment_index);
+
+ f = svm_fifo_segment_alloc_fifo (sp, 4096);
+
+ if (f == 0)
+ return clib_error_return (0, "svm_fifo_segment_alloc_fifo failed");
+
+ test_data = format (0, "Hello world%c", 0);
+ vec_validate (retrieved_data, vec_len (test_data) - 1);
+
+ for (i = 0; i < 1000; i++)
+ svm_fifo_enqueue_nowait (f, pid, vec_len (test_data), test_data);
+
+ return clib_error_return (0, "master (enqueue) done");
+}
+
+clib_error_t *
+mempig (int verbose)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ svm_fifo_segment_private_t *sp;
+ svm_fifo_t *f;
+ svm_fifo_t **flist = 0;
+ int rv;
+ int i;
+
+ memset (a, 0, sizeof (*a));
+
+ a->segment_name = "fifo-test1";
+ a->segment_size = 256 << 10;
+
+ rv = svm_fifo_segment_create (a);
+
+ if (rv)
+ return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);
+
+ sp = svm_fifo_get_segment (a->new_segment_index);
+
+ for (i = 0; i < 1000; i++)
+ {
+ f = svm_fifo_segment_alloc_fifo (sp, 4096);
+ if (f == 0)
+ break;
+ vec_add1 (flist, f);
+ }
+
+ fformat (stdout, "Try #1: created %d fifos...\n", vec_len (flist));
+ for (i = 0; i < vec_len (flist); i++)
+ {
+ f = flist[i];
+ svm_fifo_segment_free_fifo (sp, f);
+ }
+
+ _vec_len (flist) = 0;
+
+ for (i = 0; i < 1000; i++)
+ {
+ f = svm_fifo_segment_alloc_fifo (sp, 4096);
+ if (f == 0)
+ break;
+ vec_add1 (flist, f);
+ }
+
+ fformat (stdout, "Try #2: created %d fifos...\n", vec_len (flist));
+ for (i = 0; i < vec_len (flist); i++)
+ {
+ f = flist[i];
+ svm_fifo_segment_free_fifo (sp, f);
+ }
+
+ return 0;
+}
+
+clib_error_t *
+offset (int verbose)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ svm_fifo_segment_private_t *sp;
+ svm_fifo_t *f;
+ int rv;
+ u32 *test_data = 0;
+ u32 *recovered_data = 0;
+ int i;
+ int pid = getpid ();
+
+ memset (a, 0, sizeof (*a));
+
+ a->segment_name = "fifo-test1";
+ a->segment_size = 256 << 10;
+
+ rv = svm_fifo_segment_create (a);
+
+ if (rv)
+ return clib_error_return (0, "svm_fifo_segment_create returned %d", rv);
+
+ sp = svm_fifo_get_segment (a->new_segment_index);
+
+ f = svm_fifo_segment_alloc_fifo (sp, 200 << 10);
+
+ if (f == 0)
+ return clib_error_return (0, "svm_fifo_segment_alloc_fifo failed");
+
+ for (i = 0; i < (3 * 1024); i++)
+ vec_add1 (test_data, i);
+
+ /* Enqueue the first 1024 u32's */
+ svm_fifo_enqueue_nowait (f, pid, 4096 /* bytes to enqueue */ ,
+ (u8 *) test_data);
+
+ /* Enqueue the third 1024 u32's 2048 ahead of the current tail */
+ svm_fifo_enqueue_with_offset (f, pid, 4096, 4096, (u8 *) & test_data[2048]);
+
+ /* Enqueue the second 1024 u32's at the current tail */
+ svm_fifo_enqueue_nowait (f, pid, 4096 /* bytes to enqueue */ ,
+ (u8 *) & test_data[1024]);
+
+ vec_validate (recovered_data, (3 * 1024) - 1);
+
+ svm_fifo_dequeue_nowait (f, pid, 3 * 4096, (u8 *) recovered_data);
+
+ for (i = 0; i < (3 * 1024); i++)
+ {
+ if (recovered_data[i] != test_data[i])
+ {
+ clib_warning ("[%d] expected %d recovered %d", i,
+ test_data[i], recovered_data[i]);
+ return clib_error_return (0, "offset test FAILED");
+ }
+ }
+
+ return clib_error_return (0, "offset test OK");
+}
+
+clib_error_t *
+slave (int verbose)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ svm_fifo_segment_private_t *sp;
+ svm_fifo_segment_header_t *fsh;
+ svm_fifo_t *f;
+ ssvm_shared_header_t *sh;
+ int rv;
+ u8 *test_data;
+ u8 *retrieved_data = 0;
+ int pid = getpid ();
+ int i;
+
+ memset (a, 0, sizeof (*a));
+
+ a->segment_name = "fifo-test1";
+
+ rv = svm_fifo_segment_attach (a);
+
+ if (rv)
+ return clib_error_return (0, "svm_fifo_segment_attach returned %d", rv);
+
+ sp = svm_fifo_get_segment (a->new_segment_index);
+ sh = sp->ssvm.sh;
+ fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+
+ /* might wanna wait.. */
+ f = (svm_fifo_t *) fsh->fifos[0];
+
+ /* Lazy bastards united */
+ test_data = format (0, "Hello world%c", 0);
+ vec_validate (retrieved_data, vec_len (test_data) - 1);
+
+ for (i = 0; i < 1000; i++)
+ {
+ svm_fifo_dequeue_nowait (f, pid, vec_len (retrieved_data),
+ retrieved_data);
+ if (memcmp (retrieved_data, test_data, vec_len (retrieved_data)))
+ return clib_error_return (0, "retrieved data incorrect, '%s'",
+ retrieved_data);
+ }
+
+ return clib_error_return (0, "slave (dequeue) done");
+}
+
+
+int
+test_ssvm_fifo1 (unformat_input_t * input)
+{
+ clib_error_t *error = 0;
+ int verbose = 0;
+ int test_id = 0;
+
+ svm_fifo_segment_init (0x200000000ULL, 20);
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "verbose %d", &verbose))
+ ;
+ else if (unformat (input, "verbose"))
+ verbose = 1;
+ else if (unformat (input, "master"))
+ test_id = 1;
+ else if (unformat (input, "slave"))
+ test_id = 2;
+ else if (unformat (input, "mempig"))
+ test_id = 3;
+ else if (unformat (input, "offset"))
+ test_id = 4;
+ else
+ {
+ error = clib_error_create ("unknown input `%U'\n",
+ format_unformat_error, input);
+ goto out;
+ }
+ }
+
+ switch (test_id)
+ {
+ case 0:
+ error = hello_world (verbose);
+ break;
+
+ case 1:
+ error = master (verbose);
+ break;
+
+ case 2:
+ error = slave (verbose);
+ break;
+
+ case 3:
+ error = mempig (verbose);
+ break;
+
+ case 4:
+ error = offset (verbose);
+ break;
+
+ default:
+ error = clib_error_return (0, "test id %d unknown", test_id);
+ break;
+ }
+
+out:
+ if (error)
+ clib_error_report (error);
+
+ return 0;
+}
+
+
+
+int
+main (int argc, char *argv[])
+{
+ unformat_input_t i;
+ int r;
+
+ unformat_init_command_line (&i, argv);
+ r = test_ssvm_fifo1 (&i);
+ unformat_free (&i);
+ return r;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+noinst_PROGRAMS += uri_udp_test2 uri_tcp_test
+
+uri_udp_test2_SOURCES = uri/uri_udp_test2.c
+uri_udp_test2_LDADD = libvlibmemoryclient.la libvlibapi.la libsvm.la \
+ libvppinfra.la -lpthread -lm -lrt
+
+uri_tcp_test_SOURCES = uri/uri_tcp_test.c
+uri_tcp_test_LDADD = libvlibmemoryclient.la libvlibapi.la libsvm.la \
+ libvppinfra.la -lpthread -lm -lrt
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <signal.h>
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <svm/svm_fifo_segment.h>
+#include <vlibmemory/api.h>
+#include <vpp/api/vpe_msg_enum.h>
+
+#include "../vnet/session/application_interface.h"
+
+#define vl_typedefs /* define message structures */
+#include <vpp/api/vpe_all_api_h.h>
+#undef vl_typedefs
+
+/* declare message handlers for each api */
+
+#define vl_endianfun /* define message structures */
+#include <vpp/api/vpe_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <vpp/api/vpe_all_api_h.h>
+#undef vl_printfun
+
+/* Satisfy external references when not linking with -lvlib */
+vlib_main_t vlib_global_main;
+vlib_main_t **vlib_mains;
+
+typedef struct
+{
+ svm_fifo_t * server_rx_fifo;
+ svm_fifo_t * server_tx_fifo;
+
+ u32 vpp_session_index;
+ u32 vpp_session_thread;
+} session_t;
+
+typedef enum
+{
+ STATE_START,
+ STATE_READY,
+ STATE_DISCONNECTING,
+ STATE_FAILED
+} connection_state_t;
+
+typedef struct
+{
+ /* vpe input queue */
+ unix_shared_memory_queue_t *vl_input_queue;
+
+ /* API client handle */
+ u32 my_client_index;
+
+ /* The URI we're playing with */
+ u8 * uri;
+
+ /* Session pool */
+ session_t * sessions;
+
+ /* Hash table for disconnect processing */
+ uword * session_index_by_vpp_handles;
+
+ /* intermediate rx buffer */
+ u8 * rx_buf;
+
+ /* URI for slave's connect */
+ u8 * connect_uri;
+
+ u32 connected_session_index;
+
+ int i_am_master;
+
+ /* drop all packets */
+ int drop_packets;
+
+ /* Our event queue */
+ unix_shared_memory_queue_t * our_event_queue;
+
+ /* $$$ single thread only for the moment */
+ unix_shared_memory_queue_t * vpp_event_queue;
+
+ pid_t my_pid;
+
+ /* For deadman timers */
+ clib_time_t clib_time;
+
+ /* State of the connection, shared between msg RX thread and main thread */
+ volatile connection_state_t state;
+
+ /* Signal variables */
+ volatile int time_to_stop;
+ volatile int time_to_print_stats;
+
+ u32 configured_segment_size;
+
+ /* VNET_API_ERROR_FOO -> "Foo" hash table */
+ uword * error_string_by_error_number;
+
+ /* convenience */
+ svm_fifo_segment_main_t * segment_main;
+
+ u8 *connect_test_data;
+} uri_tcp_test_main_t;
+
+uri_tcp_test_main_t uri_tcp_test_main;
+
+#if CLIB_DEBUG > 0
+#define NITER 10000
+#else
+#define NITER 4000000
+#endif
+
+int
+wait_for_state_change (uri_tcp_test_main_t * utm, connection_state_t state)
+{
+#if CLIB_DEBUG > 0
+#define TIMEOUT 600.0
+#else
+#define TIMEOUT 600.0
+#endif
+
+ f64 timeout = clib_time_now (&utm->clib_time) + TIMEOUT;
+
+ while (clib_time_now (&utm->clib_time) < timeout)
+ {
+ if (utm->state == state)
+ return 0;
+ if (utm->state == STATE_FAILED)
+ return -1;
+ }
+ clib_warning ("timeout waiting for STATE_READY");
+ return -1;
+}
+
+static void
+init_error_string_table (uri_tcp_test_main_t * utm)
+{
+ utm->error_string_by_error_number = hash_create (0, sizeof (uword));
+
+#define _(n,v,s) hash_set (utm->error_string_by_error_number, -v, s);
+ foreach_vnet_api_error;
+#undef _
+
+ hash_set (utm->error_string_by_error_number, 99, "Misc");
+}
+
+static void
+stop_signal (int signum)
+{
+ uri_tcp_test_main_t *um = &uri_tcp_test_main;
+
+ um->time_to_stop = 1;
+}
+
+static void
+stats_signal (int signum)
+{
+ uri_tcp_test_main_t *um = &uri_tcp_test_main;
+
+ um->time_to_print_stats = 1;
+}
+
+static clib_error_t *
+setup_signal_handlers (void)
+{
+ signal (SIGINT, stats_signal);
+ signal (SIGQUIT, stop_signal);
+ signal (SIGTERM, stop_signal);
+
+ return 0;
+}
+
+void
+vlib_cli_output (struct vlib_main_t *vm, char *fmt, ...)
+{
+ clib_warning ("BUG");
+}
+
+int
+connect_to_vpp (char *name)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+ api_main_t *am = &api_main;
+
+ if (vl_client_connect_to_vlib ("/vpe-api", name, 32) < 0)
+ return -1;
+
+ utm->vl_input_queue = am->shmem_hdr->vl_input_queue;
+ utm->my_client_index = am->my_client_index;
+
+ return 0;
+}
+
+static void
+vl_api_map_another_segment_t_handler (vl_api_map_another_segment_t *mp)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ int rv;
+
+ a->segment_name = (char *) mp->segment_name;
+ a->segment_size = mp->segment_size;
+ /* Attach to the segment vpp created */
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning ("svm_fifo_segment_attach ('%s') failed",
+ mp->segment_name);
+ return;
+ }
+ clib_warning ("Mapped new segment '%s' size %d", mp->segment_name,
+ mp->segment_size);
+}
+
+static void
+vl_api_disconnect_session_t_handler (vl_api_disconnect_session_t * mp)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+ session_t * session;
+ vl_api_disconnect_session_reply_t * rmp;
+ uword * p;
+ int rv = 0;
+ u64 key;
+
+ key = (((u64)mp->session_thread_index) << 32) | (u64)mp->session_index;
+
+ p = hash_get (utm->session_index_by_vpp_handles, key);
+
+ if (p)
+ {
+ session = pool_elt_at_index (utm->sessions, p[0]);
+ hash_unset (utm->session_index_by_vpp_handles, key);
+ pool_put (utm->sessions, session);
+ }
+ else
+ {
+ clib_warning ("couldn't find session key %llx", key);
+ rv = -11;
+ }
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+
+ rmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION_REPLY);
+ rmp->retval = rv;
+ rmp->session_index = mp->session_index;
+ rmp->session_thread_index = mp->session_thread_index;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *)&rmp);
+}
+
+static void
+vl_api_reset_session_t_handler (vl_api_reset_session_t * mp)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+ session_t * session;
+ vl_api_reset_session_reply_t * rmp;
+ uword * p;
+ int rv = 0;
+ u64 key;
+
+ key = (((u64)mp->session_thread_index) << 32) | (u64)mp->session_index;
+
+ p = hash_get(utm->session_index_by_vpp_handles, key);
+
+ if (p)
+ {
+ session = pool_elt_at_index(utm->sessions, p[0]);
+ hash_unset(utm->session_index_by_vpp_handles, key);
+ pool_put(utm->sessions, session);
+ }
+ else
+ {
+ clib_warning("couldn't find session key %llx", key);
+ rv = -11;
+ }
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION_REPLY);
+ rmp->retval = rv;
+ rmp->session_index = mp->session_index;
+ rmp->session_thread_index = mp->session_thread_index;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *)&rmp);
+}
+
+void
+handle_fifo_event_connect_rx (uri_tcp_test_main_t *utm, session_fifo_event_t * e)
+{
+ svm_fifo_t * rx_fifo;
+ int n_read, bytes;
+
+ rx_fifo = e->fifo;
+
+ bytes = e->enqueue_length;
+ do
+ {
+ n_read = svm_fifo_dequeue_nowait (rx_fifo, 0, vec_len(utm->rx_buf),
+ utm->rx_buf);
+ if (n_read > 0)
+ bytes -= n_read;
+ }
+ while (n_read < 0 || bytes > 0);
+
+ // bytes_to_read = svm_fifo_max_dequeue (rx_fifo);
+ //
+ // bytes_to_read = vec_len(utm->rx_buf) > bytes_to_read ?
+ // bytes_to_read : vec_len(utm->rx_buf);
+ //
+ // buffer_offset = 0;
+ // while (bytes_to_read > 0)
+ // {
+ // rv = svm_fifo_dequeue_nowait2 (rx_fifo, mypid,
+ // bytes_to_read,
+ // utm->rx_buf + buffer_offset);
+ // if (rv > 0)
+ // {
+ // bytes_to_read -= rv;
+ // buffer_offset += rv;
+ // bytes_received += rv;
+ // }
+ // }
+
+
+ // while (bytes_received < bytes_sent)
+ // {
+ // rv = svm_fifo_dequeue_nowait2 (rx_fifo, mypid,
+ // vec_len (utm->rx_buf),
+ // utm->rx_buf);
+ // if (rv > 0)
+ // {
+ //#if CLIB_DEBUG > 0
+ // int j;
+ // for (j = 0; j < rv; j++)
+ // {
+ // if (utm->rx_buf[j] != ((bytes_received + j) & 0xff))
+ // {
+ // clib_warning ("error at byte %lld, 0x%x not 0x%x",
+ // bytes_received + j,
+ // utm->rx_buf[j],
+ // ((bytes_received + j )&0xff));
+ // }
+ // }
+ //#endif
+ // bytes_received += (u64) rv;
+ // }
+ // }
+}
+
+void
+handle_connect_event_queue (uri_tcp_test_main_t * utm)
+{
+ session_fifo_event_t _e, *e = &_e;;
+
+ unix_shared_memory_queue_sub (utm->our_event_queue, (u8 *) e, 0 /* nowait */);
+ switch (e->event_type)
+ {
+ case FIFO_EVENT_SERVER_RX:
+ handle_fifo_event_connect_rx (utm, e);
+ break;
+
+ case FIFO_EVENT_SERVER_EXIT:
+ return;
+
+ default:
+ clib_warning("unknown event type %d", e->event_type);
+ break;
+ }
+}
+
+void
+uri_tcp_connect_send (uri_tcp_test_main_t *utm)
+{
+ u8 *test_data = utm->connect_test_data;
+ u64 bytes_sent = 0;
+ int rv;
+ int mypid = getpid();
+ session_t * session;
+ svm_fifo_t *tx_fifo;
+ int buffer_offset, bytes_to_send = 0;
+ session_fifo_event_t evt;
+ static int serial_number = 0;
+ int i;
+ u32 max_chunk = 64 << 10, write;
+
+ session = pool_elt_at_index (utm->sessions, utm->connected_session_index);
+ tx_fifo = session->server_tx_fifo;
+
+ vec_validate (utm->rx_buf, vec_len (test_data) - 1);
+
+ for (i = 0; i < 10; i++)
+ {
+ bytes_to_send = vec_len (test_data);
+ buffer_offset = 0;
+ while (bytes_to_send > 0)
+ {
+ write = bytes_to_send > max_chunk ? max_chunk : bytes_to_send;
+ rv = svm_fifo_enqueue_nowait (tx_fifo, mypid, write,
+ test_data + buffer_offset);
+
+ if (rv > 0)
+ {
+ bytes_to_send -= rv;
+ buffer_offset += rv;
+ bytes_sent += rv;
+
+ /* Fabricate TX event, send to vpp */
+ evt.fifo = tx_fifo;
+ evt.event_type = FIFO_EVENT_SERVER_TX;
+ /* $$$$ for event logging */
+ evt.enqueue_length = rv;
+ evt.event_id = serial_number++;
+
+ unix_shared_memory_queue_add (utm->vpp_event_queue, (u8 *) &evt,
+ 0 /* do wait for mutex */);
+ }
+ }
+ }
+}
+
+static void
+uri_tcp_client_test (uri_tcp_test_main_t * utm)
+{
+ vl_api_connect_uri_t * cmp;
+ vl_api_disconnect_session_t *dmp;
+ session_t *connected_session;
+ int i;
+
+ cmp = vl_msg_api_alloc (sizeof (*cmp));
+ memset (cmp, 0, sizeof (*cmp));
+
+ cmp->_vl_msg_id = ntohs (VL_API_CONNECT_URI);
+ cmp->client_index = utm->my_client_index;
+ cmp->context = ntohl(0xfeedface);
+ memcpy (cmp->uri, utm->connect_uri, vec_len (utm->connect_uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *)&cmp);
+
+ if (wait_for_state_change (utm, STATE_READY))
+ {
+ return;
+ }
+
+ /* Init test data */
+ vec_validate (utm->connect_test_data, 64 * 1024 - 1);
+ for (i = 0; i < vec_len (utm->connect_test_data); i++)
+ utm->connect_test_data[i] = i & 0xff;
+
+ /* Start reader thread */
+ /* handle_connect_event_queue (utm); */
+
+ /* Start send */
+ uri_tcp_connect_send (utm);
+
+ /* Disconnect */
+ connected_session = pool_elt_at_index(utm->sessions,
+ utm->connected_session_index);
+ dmp = vl_msg_api_alloc (sizeof (*dmp));
+ memset (dmp, 0, sizeof (*dmp));
+ dmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION);
+ dmp->client_index = utm->my_client_index;
+ dmp->session_index = connected_session->vpp_session_index;
+ dmp->session_thread_index = connected_session->vpp_session_thread;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *)&dmp);
+}
+
+void
+handle_fifo_event_server_rx (uri_tcp_test_main_t *utm, session_fifo_event_t * e)
+{
+ svm_fifo_t * rx_fifo, * tx_fifo;
+ int n_read;
+
+ session_fifo_event_t evt;
+ unix_shared_memory_queue_t *q;
+ int rv, bytes;
+
+ rx_fifo = e->fifo;
+ tx_fifo = utm->sessions[rx_fifo->client_session_index].server_tx_fifo;
+
+ bytes = e->enqueue_length;
+ do
+ {
+ n_read = svm_fifo_dequeue_nowait (rx_fifo, 0, vec_len(utm->rx_buf),
+ utm->rx_buf);
+
+ /* Reflect if a non-drop session */
+ if (!utm->drop_packets && n_read > 0)
+ {
+ do
+ {
+ rv = svm_fifo_enqueue_nowait (tx_fifo, 0, n_read, utm->rx_buf);
+ }
+ while (rv == -2);
+
+ /* Fabricate TX event, send to vpp */
+ evt.fifo = tx_fifo;
+ evt.event_type = FIFO_EVENT_SERVER_TX;
+ /* $$$$ for event logging */
+ evt.enqueue_length = n_read;
+ evt.event_id = e->event_id;
+ q = utm->vpp_event_queue;
+ unix_shared_memory_queue_add (q, (u8 *) &evt, 0 /* do wait for mutex */);
+ }
+
+ if (n_read > 0)
+ bytes -= n_read;
+ }
+ while (n_read < 0 || bytes > 0);
+}
+
+void
+handle_event_queue (uri_tcp_test_main_t * utm)
+{
+ session_fifo_event_t _e, *e = &_e;;
+
+ while (1)
+ {
+ unix_shared_memory_queue_sub (utm->our_event_queue, (u8 *)e,
+ 0 /* nowait */);
+ switch (e->event_type)
+ {
+ case FIFO_EVENT_SERVER_RX:
+ handle_fifo_event_server_rx (utm, e);
+ break;
+
+ case FIFO_EVENT_SERVER_EXIT:
+ return;
+
+ default:
+ clib_warning ("unknown event type %d", e->event_type);
+ break;
+ }
+ if (PREDICT_FALSE(utm->time_to_stop == 1))
+ break;
+ if (PREDICT_FALSE(utm->time_to_print_stats == 1))
+ {
+ utm->time_to_print_stats = 0;
+ fformat(stdout, "%d connections\n", pool_elts (utm->sessions));
+ }
+ }
+}
+
+static void
+vl_api_bind_uri_reply_t_handler (vl_api_bind_uri_reply_t * mp)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ int rv;
+
+ if (mp->retval)
+ {
+ clib_warning("bind failed: %d", mp->retval);
+ return;
+ }
+
+ if (mp->segment_name_length == 0)
+ {
+ clib_warning("segment_name_length zero");
+ return;
+ }
+
+ a->segment_name = (char *) mp->segment_name;
+ a->segment_size = mp->segment_size;
+
+ ASSERT(mp->server_event_queue_address);
+
+ /* Attach to the segment vpp created */
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning("svm_fifo_segment_attach ('%s') failed", mp->segment_name);
+ return;
+ }
+
+ utm->our_event_queue =
+ (unix_shared_memory_queue_t *) mp->server_event_queue_address;
+
+ utm->state = STATE_READY;
+}
+
+static void
+vl_api_connect_uri_reply_t_handler (vl_api_connect_uri_reply_t * mp)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ session_t *session;
+ u32 session_index;
+ svm_fifo_t *rx_fifo, *tx_fifo;
+ int rv;
+
+ if (mp->retval)
+ {
+ clib_warning ("connection failed with code: %d", mp->retval);
+ utm->state = STATE_FAILED;
+ return;
+ }
+ /*
+ * Attatch to segment
+ */
+
+ if (mp->segment_name_length == 0)
+ {
+ clib_warning ("segment_name_length zero");
+ utm->state = STATE_FAILED;
+ return;
+ }
+
+ a->segment_name = (char *) mp->segment_name;
+ a->segment_size = mp->segment_size;
+
+ ASSERT(mp->client_event_queue_address);
+
+ /* Attach to the segment vpp created */
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning ("svm_fifo_segment_attach ('%s') failed",
+ mp->segment_name);
+ return;
+ }
+
+ /*
+ * Save the queues
+ */
+
+ utm->our_event_queue = (unix_shared_memory_queue_t *)
+ mp->client_event_queue_address;
+
+ utm->vpp_event_queue = (unix_shared_memory_queue_t *)
+ mp->vpp_event_queue_address;
+
+ /*
+ * Setup session
+ */
+
+ pool_get (utm->sessions, session);
+ session_index = session - utm->sessions;
+
+ rx_fifo = (svm_fifo_t *)mp->server_rx_fifo;
+ rx_fifo->client_session_index = session_index;
+ tx_fifo = (svm_fifo_t *)mp->server_tx_fifo;
+ tx_fifo->client_session_index = session_index;
+
+ session->server_rx_fifo = rx_fifo;
+ session->server_tx_fifo = tx_fifo;
+ session->vpp_session_index = mp->session_index;
+ session->vpp_session_thread = mp->session_thread_index;
+
+ /* Save handle */
+ utm->connected_session_index = session_index;
+
+ utm->state = STATE_READY;
+}
+
+void
+uri_tcp_bind (uri_tcp_test_main_t *utm)
+{
+ vl_api_bind_uri_t * bmp;
+ u32 fifo_size = 3 << 20;
+ bmp = vl_msg_api_alloc (sizeof (*bmp));
+ memset (bmp, 0, sizeof (*bmp));
+
+ bmp->_vl_msg_id = ntohs (VL_API_BIND_URI);
+ bmp->client_index = utm->my_client_index;
+ bmp->context = ntohl(0xfeedface);
+ bmp->initial_segment_size = 256<<20; /* size of initial segment */
+ bmp->options[SESSION_OPTIONS_FLAGS] =
+ SESSION_OPTIONS_FLAGS_USE_FIFO | SESSION_OPTIONS_FLAGS_ADD_SEGMENT;
+ bmp->options[SESSION_OPTIONS_RX_FIFO_SIZE] = fifo_size;
+ bmp->options[SESSION_OPTIONS_TX_FIFO_SIZE] = fifo_size;
+ bmp->options[SESSION_OPTIONS_ADD_SEGMENT_SIZE] = 128<<20;
+ memcpy (bmp->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *)&bmp);
+}
+
+static void
+vl_api_unbind_uri_reply_t_handler (vl_api_unbind_uri_reply_t *mp)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+
+ if (mp->retval != 0)
+ clib_warning ("returned %d", ntohl(mp->retval));
+
+ utm->state = STATE_START;
+}
+
+void
+uri_tcp_unbind (uri_tcp_test_main_t *utm)
+{
+ vl_api_unbind_uri_t * ump;
+
+ ump = vl_msg_api_alloc (sizeof (*ump));
+ memset (ump, 0, sizeof (*ump));
+
+ ump->_vl_msg_id = ntohs (VL_API_UNBIND_URI);
+ ump->client_index = utm->my_client_index;
+ memcpy (ump->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *)&ump);
+}
+
+static void
+vl_api_accept_session_t_handler (vl_api_accept_session_t * mp)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+ vl_api_accept_session_reply_t *rmp;
+ svm_fifo_t * rx_fifo, * tx_fifo;
+ session_t * session;
+ static f64 start_time;
+ u64 key;
+ u32 session_index;
+
+ if (start_time == 0.0)
+ start_time = clib_time_now (&utm->clib_time);
+
+ utm->vpp_event_queue = (unix_shared_memory_queue_t *)
+ mp->vpp_event_queue_address;
+
+ /* Allocate local session and set it up */
+ pool_get (utm->sessions, session);
+ session_index = session - utm->sessions;
+
+ rx_fifo = (svm_fifo_t *)mp->server_rx_fifo;
+ rx_fifo->client_session_index = session_index;
+ tx_fifo = (svm_fifo_t *)mp->server_tx_fifo;
+ tx_fifo->client_session_index = session_index;
+
+ session->server_rx_fifo = rx_fifo;
+ session->server_tx_fifo = tx_fifo;
+
+ /* Add it to lookup table */
+ key = (((u64)mp->session_thread_index) << 32) | (u64)mp->session_index;
+ hash_set (utm->session_index_by_vpp_handles, key, session_index);
+
+ utm->state = STATE_READY;
+
+ /* Stats printing */
+ if (pool_elts (utm->sessions) && (pool_elts(utm->sessions) % 20000) == 0)
+ {
+ f64 now = clib_time_now (&utm->clib_time);
+ fformat (stdout, "%d active sessions in %.2f seconds, %.2f/sec...\n",
+ pool_elts(utm->sessions), now - start_time,
+ (f64)pool_elts(utm->sessions) / (now - start_time));
+ }
+
+ /* Send accept reply to vpp */
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_ACCEPT_SESSION_REPLY);
+ rmp->session_type = mp->session_type;
+ rmp->session_index = mp->session_index;
+ rmp->session_thread_index = mp->session_thread_index;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *)&rmp);
+}
+
+void
+uri_tcp_server_test (uri_tcp_test_main_t * utm)
+{
+
+ /* Bind to uri */
+ uri_tcp_bind (utm);
+
+ if (wait_for_state_change (utm, STATE_READY))
+ {
+ clib_warning ("timeout waiting for STATE_READY");
+ return;
+ }
+
+ /* Enter handle event loop */
+ handle_event_queue (utm);
+
+ /* Cleanup */
+ uri_tcp_unbind (utm);
+
+ if (wait_for_state_change (utm, STATE_START))
+ {
+ clib_warning ("timeout waiting for STATE_START");
+ return;
+ }
+
+ fformat (stdout, "Test complete...\n");
+}
+
+#define foreach_uri_msg \
+_(BIND_URI_REPLY, bind_uri_reply) \
+_(UNBIND_URI_REPLY, unbind_uri_reply) \
+_(ACCEPT_SESSION, accept_session) \
+_(CONNECT_URI_REPLY, connect_uri_reply) \
+_(DISCONNECT_SESSION, disconnect_session) \
+_(RESET_SESSION, reset_session) \
+_(MAP_ANOTHER_SEGMENT, map_another_segment)
+
+void
+uri_api_hookup (uri_tcp_test_main_t * utm)
+{
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_uri_msg;
+#undef _
+}
+
+int
+main (int argc, char **argv)
+{
+ uri_tcp_test_main_t *utm = &uri_tcp_test_main;
+ unformat_input_t _argv, *a = &_argv;
+ u8 *chroot_prefix;
+ u8 *heap;
+ u8 * bind_name = (u8 *) "tcp://0.0.0.0/1234";
+ u32 tmp;
+ mheap_t *h;
+ session_t * session;
+ int i;
+ int i_am_master = 1, drop_packets = 0;
+
+ clib_mem_init (0, 256 << 20);
+
+ heap = clib_mem_get_per_cpu_heap ();
+ h = mheap_header (heap);
+
+ /* make the main heap thread-safe */
+ h->flags |= MHEAP_FLAG_THREAD_SAFE;
+
+ vec_validate (utm->rx_buf, 65536);
+
+ utm->session_index_by_vpp_handles =
+ hash_create (0, sizeof(uword));
+
+ utm->my_pid = getpid();
+ utm->configured_segment_size = 1<<20;
+
+ clib_time_init (&utm->clib_time);
+ init_error_string_table (utm);
+ svm_fifo_segment_init(0x200000000ULL, 20);
+ unformat_init_command_line (a, argv);
+
+ while (unformat_check_input (a) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (a, "chroot prefix %s", &chroot_prefix))
+ {
+ vl_set_memory_root_path ((char *) chroot_prefix);
+ }
+ else if (unformat (a, "uri %s", &bind_name))
+ ;
+ else if (unformat (a, "segment-size %dM", &tmp))
+ utm->configured_segment_size = tmp<<20;
+ else if (unformat (a, "segment-size %dG", &tmp))
+ utm->configured_segment_size = tmp<<30;
+ else if (unformat (a, "master"))
+ i_am_master = 1;
+ else if (unformat (a, "slave"))
+ i_am_master = 0;
+ else if (unformat (a, "drop"))
+ drop_packets = 1;
+ else
+ {
+ fformat (stderr, "%s: usage [master|slave]\n");
+ exit (1);
+ }
+ }
+
+ utm->uri = format (0, "%s%c", bind_name, 0);
+ utm->i_am_master = i_am_master;
+ utm->segment_main = &svm_fifo_segment_main;
+ utm->drop_packets = drop_packets;
+
+ utm->connect_uri = format (0, "tcp://6.0.1.2/1234%c", 0);
+
+ setup_signal_handlers();
+ uri_api_hookup (utm);
+
+ if (connect_to_vpp (i_am_master? "uri_tcp_server":"uri_tcp_client") < 0)
+ {
+ svm_region_exit ();
+ fformat (stderr, "Couldn't connect to vpe, exiting...\n");
+ exit (1);
+ }
+
+ if (i_am_master == 0)
+ {
+ uri_tcp_client_test (utm);
+ exit (0);
+ }
+
+ /* $$$$ hack preallocation */
+ for (i = 0; i < 200000; i++)
+ {
+ pool_get (utm->sessions, session);
+ memset (session, 0, sizeof (*session));
+ }
+ for (i = 0; i < 200000; i++)
+ pool_put_index (utm->sessions, i);
+
+ uri_tcp_server_test (utm);
+
+ vl_client_disconnect_from_vlib ();
+ exit (0);
+}
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/format.h>
+#include <vppinfra/error.h>
+#include <vppinfra/time.h>
+#include <vppinfra/macros.h>
+#include <vnet/vnet.h>
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vpp-api/vpe_msg_enum.h>
+#include <svm_fifo_segment.h>
+
+#include <vnet/uri/uri.h>
+
+#define vl_typedefs /* define message structures */
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_typedefs
+
+/* declare message handlers for each api */
+
+#define vl_endianfun /* define message structures */
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_printfun
+
+/* Satisfy external references when not linking with -lvlib */
+vlib_main_t vlib_global_main;
+vlib_main_t **vlib_mains;
+
+typedef enum
+{
+ STATE_START,
+ STATE_READY,
+ STATE_DISCONNECTING,
+} connection_state_t;
+
+typedef struct
+{
+ svm_fifo_t *server_rx_fifo;
+ svm_fifo_t *server_tx_fifo;
+} session_t;
+
+typedef struct
+{
+ /* vpe input queue */
+ unix_shared_memory_queue_t *vl_input_queue;
+
+ /* API client handle */
+ u32 my_client_index;
+
+ /* The URI we're playing with */
+ u8 *uri;
+
+ /* Session pool */
+ session_t *sessions;
+
+ /* Hash table for disconnect processing */
+ uword *session_index_by_vpp_handles;
+
+ /* fifo segment */
+ svm_fifo_segment_private_t *seg;
+
+ /* intermediate rx buffer */
+ u8 *rx_buf;
+
+ /* Our event queue */
+ unix_shared_memory_queue_t *our_event_queue;
+
+ /* $$$ single thread only for the moment */
+ unix_shared_memory_queue_t *vpp_event_queue;
+
+ /* For deadman timers */
+ clib_time_t clib_time;
+
+ /* State of the connection, shared between msg RX thread and main thread */
+ volatile connection_state_t state;
+
+ volatile int time_to_stop;
+ volatile int time_to_print_stats;
+
+ /* VNET_API_ERROR_FOO -> "Foo" hash table */
+ uword *error_string_by_error_number;
+} uri_udp_test_main_t;
+
+#if CLIB_DEBUG > 0
+#define NITER 1000
+#else
+#define NITER 1000000
+#endif
+
+uri_udp_test_main_t uri_udp_test_main;
+
+static void
+stop_signal (int signum)
+{
+ uri_udp_test_main_t *um = &uri_udp_test_main;
+
+ um->time_to_stop = 1;
+}
+
+static void
+stats_signal (int signum)
+{
+ uri_udp_test_main_t *um = &uri_udp_test_main;
+
+ um->time_to_print_stats = 1;
+}
+
+static clib_error_t *
+setup_signal_handlers (void)
+{
+ signal (SIGINT, stats_signal);
+ signal (SIGQUIT, stop_signal);
+ signal (SIGTERM, stop_signal);
+
+ return 0;
+}
+
+u8 *
+format_api_error (u8 * s, va_list * args)
+{
+ uri_udp_test_main_t *utm = va_arg (*args, uri_udp_test_main_t *);
+ i32 error = va_arg (*args, u32);
+ uword *p;
+
+ p = hash_get (utm->error_string_by_error_number, -error);
+
+ if (p)
+ s = format (s, "%s", p[0]);
+ else
+ s = format (s, "%d", error);
+ return s;
+}
+
+int
+wait_for_state_change (uri_udp_test_main_t * utm, connection_state_t state)
+{
+ f64 timeout = clib_time_now (&utm->clib_time) + 5.0;
+
+ while (clib_time_now (&utm->clib_time) < timeout)
+ {
+ if (utm->state == state)
+ return 0;
+ }
+ return -1;
+}
+
+static void
+vl_api_bind_uri_reply_t_handler (vl_api_bind_uri_reply_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ int rv;
+
+ if (mp->segment_name_length == 0)
+ {
+ clib_warning ("segment_name_length zero");
+ return;
+ }
+
+ a->segment_name = (char *) mp->segment_name;
+
+ /* Attach to the segment vpp created */
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning ("sm_fifo_segment_create ('%s') failed", mp->segment_name);
+ return;
+ }
+
+ utm->our_event_queue = (unix_shared_memory_queue_t *)
+ mp->server_event_queue_address;
+
+ utm->state = STATE_READY;
+}
+
+static void
+vl_api_unbind_uri_reply_t_handler (vl_api_unbind_uri_reply_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+
+ if (mp->retval != 0)
+ clib_warning ("returned %d", ntohl (mp->retval));
+
+ utm->state = STATE_START;
+}
+
+static void
+vl_api_accept_session_t_handler (vl_api_accept_session_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ vl_api_accept_session_reply_t *rmp;
+ svm_fifo_t *rx_fifo, *tx_fifo;
+ session_t *session;
+ static f64 start_time;
+ u64 key;
+
+ if (start_time == 0.0)
+ start_time = clib_time_now (&utm->clib_time);
+
+ utm->vpp_event_queue = (unix_shared_memory_queue_t *)
+ mp->vpp_event_queue_address;
+
+ pool_get (utm->sessions, session);
+
+ rx_fifo = (svm_fifo_t *) mp->server_rx_fifo;
+ rx_fifo->client_session_index = session - utm->sessions;
+ tx_fifo = (svm_fifo_t *) mp->server_tx_fifo;
+ tx_fifo->client_session_index = session - utm->sessions;
+
+ session->server_rx_fifo = rx_fifo;
+ session->server_tx_fifo = tx_fifo;
+
+ key = (((u64) mp->session_thread_index) << 32) | (u64) mp->session_index;
+
+ hash_set (utm->session_index_by_vpp_handles, key, session - utm->sessions);
+
+ utm->state = STATE_READY;
+
+ if (pool_elts (utm->sessions) && (pool_elts (utm->sessions) % 20000) == 0)
+ {
+ f64 now = clib_time_now (&utm->clib_time);
+ fformat (stdout, "%d active sessions in %.2f seconds, %.2f/sec...\n",
+ pool_elts (utm->sessions), now - start_time,
+ (f64) pool_elts (utm->sessions) / (now - start_time));
+ }
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_ACCEPT_SESSION_REPLY);
+ rmp->session_type = mp->session_type;
+ rmp->session_index = mp->session_index;
+ rmp->session_thread_index = mp->session_thread_index;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & rmp);
+}
+
+static void
+vl_api_disconnect_session_t_handler (vl_api_disconnect_session_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ session_t *session;
+ vl_api_disconnect_session_reply_t *rmp;
+ uword *p;
+ int rv = 0;
+ u64 key;
+
+ key = (((u64) mp->session_thread_index) << 32) | (u64) mp->session_index;
+
+ p = hash_get (utm->session_index_by_vpp_handles, key);
+
+ if (p)
+ {
+ session = pool_elt_at_index (utm->sessions, p[0]);
+ hash_unset (utm->session_index_by_vpp_handles, key);
+ pool_put (utm->sessions, session);
+ }
+ else
+ {
+ clib_warning ("couldn't find session key %llx", key);
+ rv = -11;
+ }
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION_REPLY);
+ rmp->retval = rv;
+ rmp->session_index = mp->session_index;
+ rmp->session_thread_index = mp->session_thread_index;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & rmp);
+}
+
+#define foreach_uri_msg \
+_(BIND_URI_REPLY, bind_uri_reply) \
+_(UNBIND_URI_REPLY, unbind_uri_reply) \
+_(ACCEPT_SESSION, accept_session) \
+_(DISCONNECT_SESSION, disconnect_session)
+
+void
+uri_api_hookup (uri_udp_test_main_t * utm)
+{
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_uri_msg;
+#undef _
+
+}
+
+
+int
+connect_to_vpp (char *name)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ api_main_t *am = &api_main;
+
+ if (vl_client_connect_to_vlib ("/vpe-api", name, 32) < 0)
+ return -1;
+
+ utm->vl_input_queue = am->shmem_hdr->vl_input_queue;
+ utm->my_client_index = am->my_client_index;
+
+ return 0;
+}
+
+void
+vlib_cli_output (struct vlib_main_t *vm, char *fmt, ...)
+{
+ clib_warning ("BUG");
+}
+
+static void
+init_error_string_table (uri_udp_test_main_t * utm)
+{
+ utm->error_string_by_error_number = hash_create (0, sizeof (uword));
+
+#define _(n,v,s) hash_set (utm->error_string_by_error_number, -v, s);
+ foreach_vnet_api_error;
+#undef _
+
+ hash_set (utm->error_string_by_error_number, 99, "Misc");
+}
+
+void
+handle_fifo_event_server_rx (uri_udp_test_main_t * utm,
+ session_fifo_event_t * e)
+{
+ svm_fifo_t *rx_fifo, *tx_fifo;
+ int nbytes;
+
+ session_fifo_event_t evt;
+ unix_shared_memory_queue_t *q;
+ int rv;
+
+ rx_fifo = e->fifo;
+ tx_fifo = utm->sessions[rx_fifo->client_session_index].server_tx_fifo;
+
+ do
+ {
+ nbytes = svm_fifo_dequeue_nowait (rx_fifo, 0,
+ vec_len (utm->rx_buf), utm->rx_buf);
+ }
+ while (nbytes <= 0);
+ do
+ {
+ rv = svm_fifo_enqueue_nowait (tx_fifo, 0, nbytes, utm->rx_buf);
+ }
+ while (rv == -2);
+
+ /* Fabricate TX event, send to vpp */
+ evt.fifo = tx_fifo;
+ evt.event_type = FIFO_EVENT_SERVER_TX;
+ /* $$$$ for event logging */
+ evt.enqueue_length = nbytes;
+ evt.event_id = e->event_id;
+ q = utm->vpp_event_queue;
+ unix_shared_memory_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
+}
+
+void
+handle_event_queue (uri_udp_test_main_t * utm)
+{
+ session_fifo_event_t _e, *e = &_e;;
+
+ while (1)
+ {
+ unix_shared_memory_queue_sub (utm->our_event_queue, (u8 *) e,
+ 0 /* nowait */ );
+ switch (e->event_type)
+ {
+ case FIFO_EVENT_SERVER_RX:
+ handle_fifo_event_server_rx (utm, e);
+ break;
+
+ case FIFO_EVENT_SERVER_EXIT:
+ return;
+
+ default:
+ clib_warning ("unknown event type %d", e->event_type);
+ break;
+ }
+ if (PREDICT_FALSE (utm->time_to_stop == 1))
+ break;
+ if (PREDICT_FALSE (utm->time_to_print_stats == 1))
+ {
+ utm->time_to_print_stats = 0;
+ fformat (stdout, "%d connections\n", pool_elts (utm->sessions));
+ }
+ }
+}
+
+void
+uri_udp_test (uri_udp_test_main_t * utm)
+{
+ vl_api_bind_uri_t *bmp;
+ vl_api_unbind_uri_t *ump;
+
+ bmp = vl_msg_api_alloc (sizeof (*bmp));
+ memset (bmp, 0, sizeof (*bmp));
+
+ bmp->_vl_msg_id = ntohs (VL_API_BIND_URI);
+ bmp->client_index = utm->my_client_index;
+ bmp->context = ntohl (0xfeedface);
+ bmp->segment_size = 2 << 30;
+ memcpy (bmp->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & bmp);
+
+ if (wait_for_state_change (utm, STATE_READY))
+ {
+ clib_warning ("timeout waiting for STATE_READY");
+ return;
+ }
+
+ handle_event_queue (utm);
+
+ ump = vl_msg_api_alloc (sizeof (*ump));
+ memset (ump, 0, sizeof (*ump));
+
+ ump->_vl_msg_id = ntohs (VL_API_UNBIND_URI);
+ ump->client_index = utm->my_client_index;
+ memcpy (ump->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & ump);
+
+ if (wait_for_state_change (utm, STATE_START))
+ {
+ clib_warning ("timeout waiting for STATE_START");
+ return;
+ }
+
+ fformat (stdout, "Test complete...\n");
+}
+
+int
+main (int argc, char **argv)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ unformat_input_t _argv, *a = &_argv;
+ u8 *chroot_prefix;
+ u8 *heap;
+ u8 *bind_name = (u8 *) "udp4:1234";
+ mheap_t *h;
+ session_t *session;
+ int i;
+
+ clib_mem_init (0, 256 << 20);
+
+ heap = clib_mem_get_per_cpu_heap ();
+ h = mheap_header (heap);
+
+ /* make the main heap thread-safe */
+ h->flags |= MHEAP_FLAG_THREAD_SAFE;
+
+ vec_validate (utm->rx_buf, 8192);
+
+ utm->session_index_by_vpp_handles = hash_create (0, sizeof (uword));
+
+ clib_time_init (&utm->clib_time);
+ init_error_string_table (utm);
+ svm_fifo_segment_init (0x200000000ULL, 20);
+ unformat_init_command_line (a, argv);
+
+ while (unformat_check_input (a) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (a, "chroot prefix %s", &chroot_prefix))
+ {
+ vl_set_memory_root_path ((char *) chroot_prefix);
+ }
+ else if (unformat (a, "uri %s", &bind_name))
+ ;
+ else
+ {
+ fformat (stderr, "%s: usage [master|slave]\n");
+ exit (1);
+ }
+ }
+
+ utm->uri = format (0, "%s%c", bind_name, 0);
+
+ setup_signal_handlers ();
+
+ uri_api_hookup (utm);
+
+ if (connect_to_vpp ("uri_udp_test") < 0)
+ {
+ svm_region_exit ();
+ fformat (stderr, "Couldn't connect to vpe, exiting...\n");
+ exit (1);
+ }
+
+ /* $$$$ hack preallocation */
+ for (i = 0; i < 200000; i++)
+ {
+ pool_get (utm->sessions, session);
+ memset (session, 0, sizeof (*session));
+ }
+ for (i = 0; i < 200000; i++)
+ pool_put_index (utm->sessions, i);
+
+ uri_udp_test (utm);
+
+ vl_client_disconnect_from_vlib ();
+ exit (0);
+}
+
+#undef vl_api_version
+#define vl_api_version(n,v) static u32 vpe_api_version = v;
+#include <vpp-api/vpe.api.h>
+#undef vl_api_version
+
+void
+vl_client_add_api_signatures (vl_api_memclnt_create_t * mp)
+{
+ /*
+ * Send the main API signature in slot 0. This bit of code must
+ * match the checks in ../vpe/api/api.c: vl_msg_api_version_check().
+ */
+ mp->api_versions[0] = clib_host_to_net_u32 (vpe_api_version);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/format.h>
+#include <vppinfra/error.h>
+#include <vppinfra/time.h>
+#include <vppinfra/macros.h>
+#include <vnet/vnet.h>
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vpp/api/vpe_msg_enum.h>
+#include <svm/svm_fifo_segment.h>
+#include <pthread.h>
+
+#include "../vnet/session/application_interface.h"
+
+#define vl_typedefs /* define message structures */
+#include <vpp/api/vpe_all_api_h.h>
+#undef vl_typedefs
+
+/* declare message handlers for each api */
+
+#define vl_endianfun /* define message structures */
+#include <vpp/api/vpe_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <vpp/api/vpe_all_api_h.h>
+#undef vl_printfun
+
+/* Satisfy external references when not linking with -lvlib */
+vlib_main_t vlib_global_main;
+vlib_main_t **vlib_mains;
+
+typedef enum
+{
+ STATE_START,
+ STATE_READY,
+ STATE_DISCONNECTING,
+} connection_state_t;
+
+typedef struct
+{
+ svm_fifo_t *server_rx_fifo;
+ svm_fifo_t *server_tx_fifo;
+} session_t;
+
+typedef struct
+{
+ /* vpe input queue */
+ unix_shared_memory_queue_t *vl_input_queue;
+
+ /* API client handle */
+ u32 my_client_index;
+
+ /* The URI we're playing with */
+ u8 *uri;
+
+ /* Session pool */
+ session_t *sessions;
+
+ /* Hash table for disconnect processing */
+ uword *session_index_by_vpp_handles;
+
+ /* fifo segment */
+ svm_fifo_segment_private_t *seg;
+
+ /* intermediate rx buffer */
+ u8 *rx_buf;
+
+ /* URI for connect */
+ u8 *connect_uri;
+
+ int i_am_master;
+
+ /* Our event queue */
+ unix_shared_memory_queue_t *our_event_queue;
+
+ /* $$$ single thread only for the moment */
+ unix_shared_memory_queue_t *vpp_event_queue;
+
+ /* $$$$ hack: cut-through session index */
+ volatile u32 cut_through_session_index;
+
+ /* unique segment name counter */
+ u32 unique_segment_index;
+
+ pid_t my_pid;
+
+ /* pthread handle */
+ pthread_t cut_through_thread_handle;
+
+ /* For deadman timers */
+ clib_time_t clib_time;
+
+ /* State of the connection, shared between msg RX thread and main thread */
+ volatile connection_state_t state;
+
+ volatile int time_to_stop;
+ volatile int time_to_print_stats;
+
+ u32 configured_segment_size;
+
+ /* VNET_API_ERROR_FOO -> "Foo" hash table */
+ uword *error_string_by_error_number;
+
+ /* convenience */
+ svm_fifo_segment_main_t *segment_main;
+
+} uri_udp_test_main_t;
+
+#if CLIB_DEBUG > 0
+#define NITER 10000
+#else
+#define NITER 4000000
+#endif
+
+uri_udp_test_main_t uri_udp_test_main;
+
+static void
+stop_signal (int signum)
+{
+ uri_udp_test_main_t *um = &uri_udp_test_main;
+
+ um->time_to_stop = 1;
+}
+
+static void
+stats_signal (int signum)
+{
+ uri_udp_test_main_t *um = &uri_udp_test_main;
+
+ um->time_to_print_stats = 1;
+}
+
+static clib_error_t *
+setup_signal_handlers (void)
+{
+ signal (SIGINT, stats_signal);
+ signal (SIGQUIT, stop_signal);
+ signal (SIGTERM, stop_signal);
+
+ return 0;
+}
+
+u8 *
+format_api_error (u8 * s, va_list * args)
+{
+ uri_udp_test_main_t *utm = va_arg (*args, uri_udp_test_main_t *);
+ i32 error = va_arg (*args, u32);
+ uword *p;
+
+ p = hash_get (utm->error_string_by_error_number, -error);
+
+ if (p)
+ s = format (s, "%s", p[0]);
+ else
+ s = format (s, "%d", error);
+ return s;
+}
+
+int
+wait_for_state_change (uri_udp_test_main_t * utm, connection_state_t state)
+{
+#if CLIB_DEBUG > 0
+#define TIMEOUT 600.0
+#else
+#define TIMEOUT 600.0
+#endif
+
+ f64 timeout = clib_time_now (&utm->clib_time) + TIMEOUT;
+
+ while (clib_time_now (&utm->clib_time) < timeout)
+ {
+ if (utm->state == state)
+ return 0;
+ }
+ return -1;
+}
+
+u64 server_bytes_received, server_bytes_sent;
+
+static void *
+cut_through_thread_fn (void *arg)
+{
+ session_t *s;
+ svm_fifo_t *rx_fifo;
+ svm_fifo_t *tx_fifo;
+ u8 *my_copy_buffer = 0;
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ i32 actual_transfer;
+ int rv;
+ u32 buffer_offset;
+
+ while (utm->cut_through_session_index == ~0)
+ ;
+
+ s = pool_elt_at_index (utm->sessions, utm->cut_through_session_index);
+
+ rx_fifo = s->server_rx_fifo;
+ tx_fifo = s->server_tx_fifo;
+
+ vec_validate (my_copy_buffer, 64 * 1024 - 1);
+
+ while (true)
+ {
+ /* We read from the tx fifo and write to the rx fifo */
+ do
+ {
+ actual_transfer = svm_fifo_dequeue_nowait (tx_fifo, 0,
+ vec_len (my_copy_buffer),
+ my_copy_buffer);
+ }
+ while (actual_transfer <= 0);
+
+ server_bytes_received += actual_transfer;
+
+ buffer_offset = 0;
+ while (actual_transfer > 0)
+ {
+ rv = svm_fifo_enqueue_nowait (rx_fifo, 0, actual_transfer,
+ my_copy_buffer + buffer_offset);
+ if (rv > 0)
+ {
+ actual_transfer -= rv;
+ buffer_offset += rv;
+ server_bytes_sent += rv;
+ }
+
+ }
+ if (PREDICT_FALSE (utm->time_to_stop))
+ break;
+ }
+
+ pthread_exit (0);
+}
+
+static void
+uri_udp_slave_test (uri_udp_test_main_t * utm)
+{
+ vl_api_connect_uri_t *cmp;
+ int i;
+ u8 *test_data = 0;
+ u64 bytes_received = 0, bytes_sent = 0;
+ i32 bytes_to_read;
+ int rv;
+ int mypid = getpid ();
+ f64 before, after, delta, bytes_per_second;
+ session_t *session;
+ svm_fifo_t *rx_fifo, *tx_fifo;
+ int buffer_offset, bytes_to_send = 0;
+
+ vec_validate (test_data, 64 * 1024 - 1);
+ for (i = 0; i < vec_len (test_data); i++)
+ test_data[i] = i & 0xff;
+
+ cmp = vl_msg_api_alloc (sizeof (*cmp));
+ memset (cmp, 0, sizeof (*cmp));
+
+ cmp->_vl_msg_id = ntohs (VL_API_CONNECT_URI);
+ cmp->client_index = utm->my_client_index;
+ cmp->context = ntohl (0xfeedface);
+ memcpy (cmp->uri, utm->connect_uri, vec_len (utm->connect_uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & cmp);
+
+ if (wait_for_state_change (utm, STATE_READY))
+ {
+ clib_warning ("timeout waiting for STATE_READY");
+ return;
+ }
+
+ session = pool_elt_at_index (utm->sessions, utm->cut_through_session_index);
+ rx_fifo = session->server_rx_fifo;
+ tx_fifo = session->server_tx_fifo;
+
+ before = clib_time_now (&utm->clib_time);
+
+ vec_validate (utm->rx_buf, vec_len (test_data) - 1);
+
+ for (i = 0; i < NITER; i++)
+ {
+ bytes_to_send = vec_len (test_data);
+ buffer_offset = 0;
+ while (bytes_to_send > 0)
+ {
+ rv = svm_fifo_enqueue_nowait (tx_fifo, mypid,
+ bytes_to_send,
+ test_data + buffer_offset);
+
+ if (rv > 0)
+ {
+ bytes_to_send -= rv;
+ buffer_offset += rv;
+ bytes_sent += rv;
+ }
+ }
+
+ bytes_to_read = svm_fifo_max_dequeue (rx_fifo);
+
+ bytes_to_read = vec_len (utm->rx_buf) > bytes_to_read ?
+ bytes_to_read : vec_len (utm->rx_buf);
+
+ buffer_offset = 0;
+ while (bytes_to_read > 0)
+ {
+ rv = svm_fifo_dequeue_nowait (rx_fifo, mypid,
+ bytes_to_read,
+ utm->rx_buf + buffer_offset);
+ if (rv > 0)
+ {
+ bytes_to_read -= rv;
+ buffer_offset += rv;
+ bytes_received += rv;
+ }
+ }
+ }
+ while (bytes_received < bytes_sent)
+ {
+ rv = svm_fifo_dequeue_nowait (rx_fifo, mypid,
+ vec_len (utm->rx_buf), utm->rx_buf);
+ if (rv > 0)
+ {
+#if CLIB_DEBUG > 0
+ int j;
+ for (j = 0; j < rv; j++)
+ {
+ if (utm->rx_buf[j] != ((bytes_received + j) & 0xff))
+ {
+ clib_warning ("error at byte %lld, 0x%x not 0x%x",
+ bytes_received + j,
+ utm->rx_buf[j],
+ ((bytes_received + j) & 0xff));
+ }
+ }
+#endif
+ bytes_received += (u64) rv;
+ }
+ }
+
+ after = clib_time_now (&utm->clib_time);
+ delta = after - before;
+ bytes_per_second = 0.0;
+
+ if (delta > 0.0)
+ bytes_per_second = (f64) bytes_received / delta;
+
+ fformat (stdout,
+ "Done: %lld recv bytes in %.2f seconds, %.2f bytes/sec...\n\n",
+ bytes_received, delta, bytes_per_second);
+ fformat (stdout,
+ "Done: %lld sent bytes in %.2f seconds, %.2f bytes/sec...\n\n",
+ bytes_sent, delta, bytes_per_second);
+ fformat (stdout,
+ "client -> server -> client round trip: %.2f Gbit/sec \n\n",
+ (bytes_per_second * 8.0) / 1e9);
+}
+
+static void
+vl_api_bind_uri_reply_t_handler (vl_api_bind_uri_reply_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ int rv;
+
+ if (mp->segment_name_length == 0)
+ {
+ clib_warning ("segment_name_length zero");
+ return;
+ }
+
+ a->segment_name = (char *) mp->segment_name;
+ a->segment_size = mp->segment_size;
+
+ ASSERT (mp->server_event_queue_address);
+
+ /* Attach to the segment vpp created */
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning ("svm_fifo_segment_attach ('%s') failed",
+ mp->segment_name);
+ return;
+ }
+
+ utm->our_event_queue = (unix_shared_memory_queue_t *)
+ mp->server_event_queue_address;
+
+ utm->state = STATE_READY;
+}
+
+static void
+vl_api_map_another_segment_t_handler (vl_api_map_another_segment_t * mp)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ int rv;
+
+ a->segment_name = (char *) mp->segment_name;
+ a->segment_size = mp->segment_size;
+ /* Attach to the segment vpp created */
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning ("svm_fifo_segment_attach ('%s') failed",
+ mp->segment_name);
+ return;
+ }
+ clib_warning ("Mapped new segment '%s' size %d", mp->segment_name,
+ mp->segment_size);
+}
+
+static void
+vl_api_connect_uri_t_handler (vl_api_connect_uri_t * mp)
+{
+ u32 segment_index;
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ svm_fifo_segment_private_t *seg;
+ unix_shared_memory_queue_t *client_q;
+ vl_api_connect_uri_reply_t *rmp;
+ session_t *session;
+ int rv = 0;
+
+ /* Create the segment */
+ a->segment_name = (char *) format (0, "%d:segment%d%c", utm->my_pid,
+ utm->unique_segment_index++, 0);
+ a->segment_size = utm->configured_segment_size;
+
+ rv = svm_fifo_segment_create (a);
+ if (rv)
+ {
+ clib_warning ("sm_fifo_segment_create ('%s') failed", a->segment_name);
+ rv = VNET_API_ERROR_URI_FIFO_CREATE_FAILED;
+ goto send_reply;
+ }
+
+ vec_add2 (utm->seg, seg, 1);
+
+ segment_index = vec_len (sm->segments) - 1;
+
+ memcpy (seg, sm->segments + segment_index, sizeof (utm->seg[0]));
+
+ pool_get (utm->sessions, session);
+
+ /*
+ * By construction the master's idea of the rx fifo ends up in
+ * fsh->fifos[0], and the master's idea of the tx fifo ends up in
+ * fsh->fifos[1].
+ */
+ session->server_rx_fifo = svm_fifo_segment_alloc_fifo (utm->seg,
+ 128 * 1024);
+ ASSERT (session->server_rx_fifo);
+
+ session->server_tx_fifo = svm_fifo_segment_alloc_fifo (utm->seg,
+ 128 * 1024);
+ ASSERT (session->server_tx_fifo);
+
+ session->server_rx_fifo->server_session_index = session - utm->sessions;
+ session->server_tx_fifo->server_session_index = session - utm->sessions;
+ utm->cut_through_session_index = session - utm->sessions;
+
+ rv = pthread_create (&utm->cut_through_thread_handle,
+ NULL /*attr */ , cut_through_thread_fn, 0);
+ if (rv)
+ {
+ clib_warning ("pthread_create returned %d", rv);
+ rv = VNET_API_ERROR_SYSCALL_ERROR_1;
+ }
+
+send_reply:
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+
+ rmp->_vl_msg_id = ntohs (VL_API_CONNECT_URI_REPLY);
+ rmp->context = mp->context;
+ rmp->retval = ntohl (rv);
+ rmp->segment_name_length = vec_len (a->segment_name);
+ memcpy (rmp->segment_name, a->segment_name, vec_len (a->segment_name));
+
+ vec_free (a->segment_name);
+
+ client_q = (unix_shared_memory_queue_t *) mp->client_queue_address;
+ vl_msg_api_send_shmem (client_q, (u8 *) & rmp);
+}
+
+static void
+vl_api_unbind_uri_reply_t_handler (vl_api_unbind_uri_reply_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+
+ if (mp->retval != 0)
+ clib_warning ("returned %d", ntohl (mp->retval));
+
+ utm->state = STATE_START;
+}
+
+static void
+vl_api_accept_session_t_handler (vl_api_accept_session_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ vl_api_accept_session_reply_t *rmp;
+ svm_fifo_t *rx_fifo, *tx_fifo;
+ session_t *session;
+ static f64 start_time;
+ u64 key;
+
+ if (start_time == 0.0)
+ start_time = clib_time_now (&utm->clib_time);
+
+ utm->vpp_event_queue = (unix_shared_memory_queue_t *)
+ mp->vpp_event_queue_address;
+
+ pool_get (utm->sessions, session);
+
+ rx_fifo = (svm_fifo_t *) mp->server_rx_fifo;
+ rx_fifo->client_session_index = session - utm->sessions;
+ tx_fifo = (svm_fifo_t *) mp->server_tx_fifo;
+ tx_fifo->client_session_index = session - utm->sessions;
+
+ session->server_rx_fifo = rx_fifo;
+ session->server_tx_fifo = tx_fifo;
+
+ key = (((u64) mp->session_thread_index) << 32) | (u64) mp->session_index;
+
+ hash_set (utm->session_index_by_vpp_handles, key, session - utm->sessions);
+
+ utm->state = STATE_READY;
+
+ if (pool_elts (utm->sessions) && (pool_elts (utm->sessions) % 20000) == 0)
+ {
+ f64 now = clib_time_now (&utm->clib_time);
+ fformat (stdout, "%d active sessions in %.2f seconds, %.2f/sec...\n",
+ pool_elts (utm->sessions), now - start_time,
+ (f64) pool_elts (utm->sessions) / (now - start_time));
+ }
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_ACCEPT_SESSION_REPLY);
+ rmp->session_type = mp->session_type;
+ rmp->session_index = mp->session_index;
+ rmp->session_thread_index = mp->session_thread_index;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & rmp);
+}
+
+static void
+vl_api_disconnect_session_t_handler (vl_api_disconnect_session_t * mp)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ session_t *session;
+ vl_api_disconnect_session_reply_t *rmp;
+ uword *p;
+ int rv = 0;
+ u64 key;
+
+ key = (((u64) mp->session_thread_index) << 32) | (u64) mp->session_index;
+
+ p = hash_get (utm->session_index_by_vpp_handles, key);
+
+ if (p)
+ {
+ session = pool_elt_at_index (utm->sessions, p[0]);
+ hash_unset (utm->session_index_by_vpp_handles, key);
+ pool_put (utm->sessions, session);
+ }
+ else
+ {
+ clib_warning ("couldn't find session key %llx", key);
+ rv = -11;
+ }
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION_REPLY);
+ rmp->retval = rv;
+ rmp->session_index = mp->session_index;
+ rmp->session_thread_index = mp->session_thread_index;
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & rmp);
+}
+
+static void
+vl_api_connect_uri_reply_t_handler (vl_api_connect_uri_reply_t * mp)
+{
+ svm_fifo_segment_main_t *sm = &svm_fifo_segment_main;
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_private_t *seg;
+ svm_fifo_segment_header_t *fsh;
+ session_t *session;
+ u32 segment_index;
+ int rv;
+
+ ASSERT (utm->i_am_master == 0);
+
+ if (mp->segment_name_length == 0)
+ {
+ clib_warning ("segment_name_length zero");
+ return;
+ }
+
+ memset (a, 0, sizeof (*a));
+
+ a->segment_name = (char *) mp->segment_name;
+
+ sleep (1);
+
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning ("sm_fifo_segment_create ('%v') failed", mp->segment_name);
+ return;
+ }
+
+ segment_index = vec_len (sm->segments) - 1;
+
+ vec_add2 (utm->seg, seg, 1);
+
+ memcpy (seg, sm->segments + segment_index, sizeof (*seg));
+ sh = seg->ssvm.sh;
+ fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+
+ while (vec_len (fsh->fifos) < 2)
+ sleep (1);
+
+ pool_get (utm->sessions, session);
+ utm->cut_through_session_index = session - utm->sessions;
+
+ session->server_rx_fifo = (svm_fifo_t *) fsh->fifos[0];
+ ASSERT (session->server_rx_fifo);
+ session->server_tx_fifo = (svm_fifo_t *) fsh->fifos[1];
+ ASSERT (session->server_tx_fifo);
+
+ /* security: could unlink /dev/shm/<mp->segment_name> here, maybe */
+
+ utm->state = STATE_READY;
+}
+
+#define foreach_uri_msg \
+_(BIND_URI_REPLY, bind_uri_reply) \
+_(CONNECT_URI, connect_uri) \
+_(CONNECT_URI_REPLY, connect_uri_reply) \
+_(UNBIND_URI_REPLY, unbind_uri_reply) \
+_(ACCEPT_SESSION, accept_session) \
+_(DISCONNECT_SESSION, disconnect_session) \
+_(MAP_ANOTHER_SEGMENT, map_another_segment)
+
+void
+uri_api_hookup (uri_udp_test_main_t * utm)
+{
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_uri_msg;
+#undef _
+
+}
+
+
+int
+connect_to_vpp (char *name)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ api_main_t *am = &api_main;
+
+ if (vl_client_connect_to_vlib ("/vpe-api", name, 32) < 0)
+ return -1;
+
+ utm->vl_input_queue = am->shmem_hdr->vl_input_queue;
+ utm->my_client_index = am->my_client_index;
+
+ return 0;
+}
+
+void
+vlib_cli_output (struct vlib_main_t *vm, char *fmt, ...)
+{
+ clib_warning ("BUG");
+}
+
+static void
+init_error_string_table (uri_udp_test_main_t * utm)
+{
+ utm->error_string_by_error_number = hash_create (0, sizeof (uword));
+
+#define _(n,v,s) hash_set (utm->error_string_by_error_number, -v, s);
+ foreach_vnet_api_error;
+#undef _
+
+ hash_set (utm->error_string_by_error_number, 99, "Misc");
+}
+
+void
+handle_fifo_event_server_rx (uri_udp_test_main_t * utm,
+ session_fifo_event_t * e)
+{
+ svm_fifo_t *rx_fifo, *tx_fifo;
+ int nbytes;
+
+ session_fifo_event_t evt;
+ unix_shared_memory_queue_t *q;
+ int rv;
+
+ rx_fifo = e->fifo;
+ tx_fifo = utm->sessions[rx_fifo->client_session_index].server_tx_fifo;
+
+ do
+ {
+ nbytes = svm_fifo_dequeue_nowait (rx_fifo, 0,
+ vec_len (utm->rx_buf), utm->rx_buf);
+ }
+ while (nbytes <= 0);
+ do
+ {
+ rv = svm_fifo_enqueue_nowait (tx_fifo, 0, nbytes, utm->rx_buf);
+ }
+ while (rv == -2);
+
+ /* Fabricate TX event, send to vpp */
+ evt.fifo = tx_fifo;
+ evt.event_type = FIFO_EVENT_SERVER_TX;
+ /* $$$$ for event logging */
+ evt.enqueue_length = nbytes;
+ evt.event_id = e->event_id;
+ q = utm->vpp_event_queue;
+ unix_shared_memory_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
+}
+
+void
+handle_event_queue (uri_udp_test_main_t * utm)
+{
+ session_fifo_event_t _e, *e = &_e;;
+
+ while (1)
+ {
+ unix_shared_memory_queue_sub (utm->our_event_queue, (u8 *) e,
+ 0 /* nowait */ );
+ switch (e->event_type)
+ {
+ case FIFO_EVENT_SERVER_RX:
+ handle_fifo_event_server_rx (utm, e);
+ break;
+
+ case FIFO_EVENT_SERVER_EXIT:
+ return;
+
+ default:
+ clib_warning ("unknown event type %d", e->event_type);
+ break;
+ }
+ if (PREDICT_FALSE (utm->time_to_stop == 1))
+ break;
+ if (PREDICT_FALSE (utm->time_to_print_stats == 1))
+ {
+ utm->time_to_print_stats = 0;
+ fformat (stdout, "%d connections\n", pool_elts (utm->sessions));
+ }
+ }
+}
+
+void
+uri_udp_test (uri_udp_test_main_t * utm)
+{
+ vl_api_bind_uri_t *bmp;
+ vl_api_unbind_uri_t *ump;
+
+ bmp = vl_msg_api_alloc (sizeof (*bmp));
+ memset (bmp, 0, sizeof (*bmp));
+
+ bmp->_vl_msg_id = ntohs (VL_API_BIND_URI);
+ bmp->client_index = utm->my_client_index;
+ bmp->context = ntohl (0xfeedface);
+ bmp->initial_segment_size = 256 << 20; /* size of initial segment */
+ bmp->options[SESSION_OPTIONS_FLAGS] =
+ SESSION_OPTIONS_FLAGS_USE_FIFO | SESSION_OPTIONS_FLAGS_ADD_SEGMENT;
+ bmp->options[SESSION_OPTIONS_RX_FIFO_SIZE] = 16 << 10;
+ bmp->options[SESSION_OPTIONS_TX_FIFO_SIZE] = 16 << 10;
+ bmp->options[SESSION_OPTIONS_ADD_SEGMENT_SIZE] = 128 << 20;
+ memcpy (bmp->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & bmp);
+
+ if (wait_for_state_change (utm, STATE_READY))
+ {
+ clib_warning ("timeout waiting for STATE_READY");
+ return;
+ }
+
+ handle_event_queue (utm);
+
+ ump = vl_msg_api_alloc (sizeof (*ump));
+ memset (ump, 0, sizeof (*ump));
+
+ ump->_vl_msg_id = ntohs (VL_API_UNBIND_URI);
+ ump->client_index = utm->my_client_index;
+ memcpy (ump->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & ump);
+
+ if (wait_for_state_change (utm, STATE_START))
+ {
+ clib_warning ("timeout waiting for STATE_START");
+ return;
+ }
+
+ fformat (stdout, "Test complete...\n");
+}
+
+int
+main (int argc, char **argv)
+{
+ uri_udp_test_main_t *utm = &uri_udp_test_main;
+ unformat_input_t _argv, *a = &_argv;
+ u8 *chroot_prefix;
+ u8 *heap;
+ u8 *bind_name = (u8 *) "udp://0.0.0.0/1234";
+ u32 tmp;
+ mheap_t *h;
+ session_t *session;
+ int i;
+ int i_am_master = 1;
+
+ clib_mem_init (0, 256 << 20);
+
+ heap = clib_mem_get_per_cpu_heap ();
+ h = mheap_header (heap);
+
+ /* make the main heap thread-safe */
+ h->flags |= MHEAP_FLAG_THREAD_SAFE;
+
+ vec_validate (utm->rx_buf, 8192);
+
+ utm->session_index_by_vpp_handles = hash_create (0, sizeof (uword));
+
+ utm->my_pid = getpid ();
+ utm->configured_segment_size = 1 << 20;
+
+ clib_time_init (&utm->clib_time);
+ init_error_string_table (utm);
+ svm_fifo_segment_init (0x200000000ULL, 20);
+ unformat_init_command_line (a, argv);
+
+ while (unformat_check_input (a) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (a, "chroot prefix %s", &chroot_prefix))
+ {
+ vl_set_memory_root_path ((char *) chroot_prefix);
+ }
+ else if (unformat (a, "uri %s", &bind_name))
+ ;
+ else if (unformat (a, "segment-size %dM", &tmp))
+ utm->configured_segment_size = tmp << 20;
+ else if (unformat (a, "segment-size %dG", &tmp))
+ utm->configured_segment_size = tmp << 30;
+ else if (unformat (a, "master"))
+ i_am_master = 1;
+ else if (unformat (a, "slave"))
+ i_am_master = 0;
+ else
+ {
+ fformat (stderr, "%s: usage [master|slave]\n");
+ exit (1);
+ }
+ }
+
+ utm->cut_through_session_index = ~0;
+ utm->uri = format (0, "%s%c", bind_name, 0);
+ utm->i_am_master = i_am_master;
+ utm->segment_main = &svm_fifo_segment_main;
+
+ utm->connect_uri = format (0, "udp://10.0.0.1/1234%c", 0);
+
+ setup_signal_handlers ();
+
+ uri_api_hookup (utm);
+
+ if (connect_to_vpp (i_am_master ? "uri_udp_master" : "uri_udp_slave") < 0)
+ {
+ svm_region_exit ();
+ fformat (stderr, "Couldn't connect to vpe, exiting...\n");
+ exit (1);
+ }
+
+ if (i_am_master == 0)
+ {
+ uri_udp_slave_test (utm);
+ exit (0);
+ }
+
+ /* $$$$ hack preallocation */
+ for (i = 0; i < 200000; i++)
+ {
+ pool_get (utm->sessions, session);
+ memset (session, 0, sizeof (*session));
+ }
+ for (i = 0; i < 200000; i++)
+ pool_put_index (utm->sessions, i);
+
+ uri_udp_test (utm);
+
+ vl_client_disconnect_from_vlib ();
+ exit (0);
+}
+
+#undef vl_api_version
+#define vl_api_version(n,v) static u32 vpe_api_version = v;
+#include <vpp/api/vpe.api.h>
+#undef vl_api_version
+
+void
+vl_client_add_api_signatures (vl_api_memclnt_create_t * mp)
+{
+ /*
+ * Send the main API signature in slot 0. This bit of code must
+ * match the checks in ../vpe/api/api.c: vl_msg_api_version_check().
+ */
+ mp->api_versions[0] = clib_host_to_net_u32 (vpe_api_version);
+}
+
+u32
+vl (void *p)
+{
+ return vec_len (p);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <setjmp.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/format.h>
+#include <vppinfra/error.h>
+#include <vppinfra/time.h>
+#include <vppinfra/macros.h>
+#include <vnet/vnet.h>
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vpp-api/vpe_msg_enum.h>
+#include <svm_fifo_segment.h>
+
+#define vl_typedefs /* define message structures */
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_typedefs
+
+/* declare message handlers for each api */
+
+#define vl_endianfun /* define message structures */
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_printfun
+
+typedef enum
+{
+ STATE_START,
+ STATE_READY,
+ STATE_DISCONNECTING,
+} connection_state_t;
+
+typedef struct
+{
+ /* vpe input queue */
+ unix_shared_memory_queue_t *vl_input_queue;
+
+ /* API client handle */
+ u32 my_client_index;
+
+ /* role */
+ int i_am_master;
+
+ /* The URI we're playing with */
+ u8 *uri;
+
+ /* fifo segment */
+ svm_fifo_segment_private_t *seg;
+
+ svm_fifo_t *rx_fifo;
+ svm_fifo_t *tx_fifo;
+
+ /* For deadman timers */
+ clib_time_t clib_time;
+
+ /* State of the connection, shared between msg RX thread and main thread */
+ volatile connection_state_t state;
+
+ /* VNET_API_ERROR_FOO -> "Foo" hash table */
+ uword *error_string_by_error_number;
+} uritest_main_t;
+
+#if CLIB_DEBUG > 0
+#define NITER 1000
+#else
+#define NITER 1000000
+#endif
+
+uritest_main_t uritest_main;
+
+u8 *
+format_api_error (u8 * s, va_list * args)
+{
+ uritest_main_t *utm = va_arg (*args, uritest_main_t *);
+ i32 error = va_arg (*args, u32);
+ uword *p;
+
+ p = hash_get (utm->error_string_by_error_number, -error);
+
+ if (p)
+ s = format (s, "%s", p[0]);
+ else
+ s = format (s, "%d", error);
+ return s;
+}
+
+int
+wait_for_state_change (uritest_main_t * utm, connection_state_t state)
+{
+ f64 timeout = clib_time_now (&utm->clib_time) + 1.0;
+
+ while (clib_time_now (&utm->clib_time) < timeout)
+ {
+ if (utm->state == state)
+ return 0;
+ }
+ return -1;
+}
+
+static void
+vl_api_bind_uri_reply_t_handler (vl_api_bind_uri_reply_t * mp)
+{
+ uritest_main_t *utm = &uritest_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ int rv;
+
+ ASSERT (utm->i_am_master);
+
+ if (mp->segment_name_length == 0)
+ {
+ clib_warning ("segment_name_length zero");
+ return;
+ }
+
+ a->segment_name = (char *) mp->segment_name;
+ a->segment_size = mp->segment_size;
+
+ /* Create the segment */
+ rv = svm_fifo_segment_create (a);
+ if (rv)
+ {
+ clib_warning ("sm_fifo_segment_create ('%s') failed", mp->segment_name);
+ return;
+ }
+
+ vec_validate (utm->seg, 0);
+
+ memcpy (utm->seg, a->rv, sizeof (*utm->seg));
+
+ /*
+ * By construction the master's idea of the rx fifo ends up in
+ * fsh->fifos[0], and the master's idea of the tx fifo ends up in
+ * fsh->fifos[1].
+ */
+ utm->rx_fifo = svm_fifo_segment_alloc_fifo (utm->seg, 10240);
+ ASSERT (utm->rx_fifo);
+
+ utm->tx_fifo = svm_fifo_segment_alloc_fifo (utm->seg, 10240);
+ ASSERT (utm->tx_fifo);
+
+ utm->state = STATE_READY;
+}
+
+static void
+vl_api_connect_uri_reply_t_handler (vl_api_connect_uri_reply_t * mp)
+{
+ uritest_main_t *utm = &uritest_main;
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_header_t *fsh;
+ int rv;
+
+ ASSERT (utm->i_am_master == 0);
+
+ if (mp->segment_name_length == 0)
+ {
+ clib_warning ("segment_name_length zero");
+ return;
+ }
+
+ memset (a, 0, sizeof (*a));
+
+ a->segment_name = (char *) mp->segment_name;
+
+ rv = svm_fifo_segment_attach (a);
+ if (rv)
+ {
+ clib_warning ("sm_fifo_segment_create ('%s') failed", mp->segment_name);
+ return;
+ }
+
+ vec_validate (utm->seg, 0);
+
+ memcpy (utm->seg, a->rv, sizeof (*utm->seg));
+ sh = utm->seg->ssvm.sh;
+ fsh = (svm_fifo_segment_header_t *) sh->opaque[0];
+
+ while (vec_len (fsh->fifos) < 2)
+ sleep (1);
+
+ utm->rx_fifo = (svm_fifo_t *) fsh->fifos[1];
+ ASSERT (utm->rx_fifo);
+ utm->tx_fifo = (svm_fifo_t *) fsh->fifos[0];
+ ASSERT (utm->tx_fifo);
+
+ /* security: could unlink /dev/shm/<mp->segment_name> here, maybe */
+
+ utm->state = STATE_READY;
+}
+
+static void
+vl_api_unbind_uri_reply_t_handler (vl_api_unbind_uri_reply_t * mp)
+{
+ uritest_main_t *utm = &uritest_main;
+
+ if (mp->retval != 0)
+ clib_warning ("returned %d", ntohl (mp->retval));
+
+ utm->state = STATE_START;
+}
+
+#define foreach_uri_msg \
+_(BIND_URI_REPLY, bind_uri_reply) \
+_(CONNECT_URI_REPLY, connect_uri_reply) \
+_(UNBIND_URI_REPLY, unbind_uri_reply)
+
+void
+uri_api_hookup (uritest_main_t * utm)
+{
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_uri_msg;
+#undef _
+
+}
+
+
+int
+connect_to_vpp (char *name)
+{
+ uritest_main_t *utm = &uritest_main;
+ api_main_t *am = &api_main;
+
+ if (vl_client_connect_to_vlib ("/vpe-api", name, 32) < 0)
+ return -1;
+
+ utm->vl_input_queue = am->shmem_hdr->vl_input_queue;
+ utm->my_client_index = am->my_client_index;
+
+ return 0;
+}
+
+void
+vlib_cli_output (struct vlib_main_t *vm, char *fmt, ...)
+{
+ clib_warning ("BUG");
+}
+
+static void
+init_error_string_table (uritest_main_t * utm)
+{
+ utm->error_string_by_error_number = hash_create (0, sizeof (uword));
+
+#define _(n,v,s) hash_set (utm->error_string_by_error_number, -v, s);
+ foreach_vnet_api_error;
+#undef _
+
+ hash_set (utm->error_string_by_error_number, 99, "Misc");
+}
+
+void
+uritest_master (uritest_main_t * utm)
+{
+ vl_api_bind_uri_t *bmp;
+ vl_api_unbind_uri_t *ump;
+ int i;
+ u8 *test_data = 0;
+ u8 *reply = 0;
+ u32 reply_len;
+ int mypid = getpid ();
+
+ for (i = 0; i < 2048; i++)
+ vec_add1 (test_data, 'a' + (i % 32));
+
+ bmp = vl_msg_api_alloc (sizeof (*bmp));
+ memset (bmp, 0, sizeof (*bmp));
+
+ bmp->_vl_msg_id = ntohs (VL_API_BIND_URI);
+ bmp->client_index = utm->my_client_index;
+ bmp->context = ntohl (0xfeedface);
+ bmp->segment_size = 256 << 10;
+ memcpy (bmp->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & bmp);
+
+ if (wait_for_state_change (utm, STATE_READY))
+ {
+ clib_warning ("timeout waiting for STATE_READY");
+ return;
+ }
+
+ for (i = 0; i < NITER; i++)
+ svm_fifo_enqueue (utm->tx_fifo, mypid, vec_len (test_data), test_data);
+
+ vec_validate (reply, 0);
+
+ reply_len = svm_fifo_dequeue (utm->rx_fifo, mypid, vec_len (reply), reply);
+
+ if (reply_len != 1)
+ clib_warning ("reply length %d", reply_len);
+
+ if (reply[0] == 1)
+ fformat (stdout, "Test OK...");
+
+ ump = vl_msg_api_alloc (sizeof (*ump));
+ memset (ump, 0, sizeof (*ump));
+
+ ump->_vl_msg_id = ntohs (VL_API_UNBIND_URI);
+ ump->client_index = utm->my_client_index;
+ memcpy (ump->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & ump);
+
+ if (wait_for_state_change (utm, STATE_START))
+ {
+ clib_warning ("timeout waiting for STATE_READY");
+ return;
+ }
+
+ fformat (stdout, "Master done...\n");
+}
+
+void
+uritest_slave (uritest_main_t * utm)
+{
+ vl_api_connect_uri_t *cmp;
+ int i, j;
+ u8 *test_data = 0;
+ u8 *reply = 0;
+ u32 bytes_received = 0;
+ u32 actual_bytes;
+ int mypid = getpid ();
+ u8 ok;
+ f64 before, after, delta, bytes_per_second;
+
+ vec_validate (test_data, 4095);
+
+ cmp = vl_msg_api_alloc (sizeof (*cmp));
+ memset (cmp, 0, sizeof (*cmp));
+
+ cmp->_vl_msg_id = ntohs (VL_API_CONNECT_URI);
+ cmp->client_index = utm->my_client_index;
+ cmp->context = ntohl (0xfeedface);
+ memcpy (cmp->uri, utm->uri, vec_len (utm->uri));
+ vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & cmp);
+
+ if (wait_for_state_change (utm, STATE_READY))
+ {
+ clib_warning ("timeout waiting for STATE_READY");
+ return;
+ }
+
+ ok = 1;
+ before = clib_time_now (&utm->clib_time);
+ for (i = 0; i < NITER; i++)
+ {
+ actual_bytes = svm_fifo_dequeue (utm->rx_fifo, mypid,
+ vec_len (test_data), test_data);
+ j = 0;
+ while (j < actual_bytes)
+ {
+ if (test_data[j] != ('a' + (bytes_received % 32)))
+ ok = 0;
+ bytes_received++;
+ j++;
+ }
+ if (bytes_received == NITER * 2048)
+ break;
+ }
+
+ vec_add1 (reply, ok);
+
+ svm_fifo_enqueue (utm->tx_fifo, mypid, vec_len (reply), reply);
+ after = clib_time_now (&utm->clib_time);
+ delta = after - before;
+ bytes_per_second = 0.0;
+
+ if (delta > 0.0)
+ bytes_per_second = (f64) bytes_received / delta;
+
+ fformat (stdout,
+ "Slave done, %d bytes in %.2f seconds, %.2f bytes/sec...\n",
+ bytes_received, delta, bytes_per_second);
+}
+
+int
+main (int argc, char **argv)
+{
+ uritest_main_t *utm = &uritest_main;
+ unformat_input_t _argv, *a = &_argv;
+ u8 *chroot_prefix;
+ u8 *heap;
+ char *bind_name = "fifo:uritest";
+ mheap_t *h;
+ int i_am_master = 0;
+
+ clib_mem_init (0, 128 << 20);
+
+ heap = clib_mem_get_per_cpu_heap ();
+ h = mheap_header (heap);
+
+ /* make the main heap thread-safe */
+ h->flags |= MHEAP_FLAG_THREAD_SAFE;
+
+ clib_time_init (&utm->clib_time);
+ init_error_string_table (utm);
+ svm_fifo_segment_init (0x200000000ULL, 20);
+ unformat_init_command_line (a, argv);
+
+ utm->uri = format (0, "%s%c", bind_name, 0);
+
+ while (unformat_check_input (a) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (a, "master"))
+ i_am_master = 1;
+ else if (unformat (a, "slave"))
+ i_am_master = 0;
+ else if (unformat (a, "chroot prefix %s", &chroot_prefix))
+ {
+ vl_set_memory_root_path ((char *) chroot_prefix);
+ }
+ else
+ {
+ fformat (stderr, "%s: usage [master|slave]\n");
+ exit (1);
+ }
+ }
+
+ uri_api_hookup (utm);
+
+ if (connect_to_vpp (i_am_master ? "uritest_master" : "uritest_slave") < 0)
+ {
+ svm_region_exit ();
+ fformat (stderr, "Couldn't connect to vpe, exiting...\n");
+ exit (1);
+ }
+
+ utm->i_am_master = i_am_master;
+
+ if (i_am_master)
+ uritest_master (utm);
+ else
+ uritest_slave (utm);
+
+ vl_client_disconnect_from_vlib ();
+ exit (0);
+}
+
+#undef vl_api_version
+#define vl_api_version(n,v) static u32 vpe_api_version = v;
+#include <vpp-api/vpe.api.h>
+#undef vl_api_version
+
+void
+vl_client_add_api_signatures (vl_api_memclnt_create_t * mp)
+{
+ /*
+ * Send the main API signature in slot 0. This bit of code must
+ * match the checks in ../vpe/api/api.c: vl_msg_api_version_check().
+ */
+ mp->api_versions[0] = clib_host_to_net_u32 (vpe_api_version);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
memset (f, 0, sizeof (f[0]));
f->index = f - bm->buffer_free_list_pool;
f->n_data_bytes = vlib_buffer_round_size (n_data_bytes);
- f->min_n_buffers_each_physmem_alloc = 16;
+ f->min_n_buffers_each_physmem_alloc = VLIB_FRAME_SIZE;
f->name = clib_mem_is_heap_object (name) ? name : format (0, "%s", name);
/* Setup free buffer template. */
return (void *) b->opaque2;
}
+/** \brief Get pointer to the end of buffer's data
+ * @param b pointer to the buffer
+ * @return pointer to tail of packet's data
+ */
+always_inline u8 *
+vlib_buffer_get_tail (vlib_buffer_t * b)
+{
+ return b->data + b->current_data + b->current_length;
+}
+
+/** \brief Append uninitialized data to buffer
+ * @param b pointer to the buffer
+ * @param size number of uninitialized bytes
+ * @return pointer to beginning of uninitialized data
+ */
+always_inline void *
+vlib_buffer_put_uninit (vlib_buffer_t * b, u8 size)
+{
+ void *p = vlib_buffer_get_tail (b);
+ /* XXX make sure there's enough space */
+ b->current_length += size;
+ return p;
+}
+
+/** \brief Prepend uninitialized data to buffer
+ * @param b pointer to the buffer
+ * @param size number of uninitialized bytes
+ * @return pointer to beginning of uninitialized data
+ */
+always_inline void *
+vlib_buffer_push_uninit (vlib_buffer_t * b, u8 size)
+{
+ ASSERT (b->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= size);
+ b->current_data -= size;
+ b->current_length += size;
+
+ return vlib_buffer_get_current (b);
+}
+
+/** \brief Make head room, typically for packet headers
+ * @param b pointer to the buffer
+ * @param size number of head room bytes
+ * @return pointer to start of buffer (current data)
+ */
+always_inline void *
+vlib_buffer_make_headroom (vlib_buffer_t * b, u8 size)
+{
+ ASSERT (b->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= size);
+ b->current_data += size;
+ return vlib_buffer_get_current (b);
+}
+
+/** \brief Retrieve bytes from buffer head
+ * @param b pointer to the buffer
+ * @param size number of bytes to pull
+ * @return pointer to start of buffer (current data)
+ */
+always_inline void *
+vlib_buffer_pull (vlib_buffer_t * b, u8 size)
+{
+ if (b->current_length + VLIB_BUFFER_PRE_DATA_SIZE < size)
+ return 0;
+
+ void *data = vlib_buffer_get_current (b);
+ vlib_buffer_advance (b, size);
+ return data;
+}
+
/* Forward declaration. */
struct vlib_main_t;
* nels = number of elements on the queue
* elsize = element size, presumably 4 and cacheline-size will
* be popular choices.
- * coid = consumer coid, from ChannelCreate
* pid = consumer pid
- * pulse_code = pulse code consumer expects
- * pulse_value = pulse value consumer expects
- * consumer_prio = consumer's priority, so pulses won't change
- * the consumer's priority.
*
* The idea is to call this function in the queue consumer,
* and e-mail the queue pointer to the producer(s).
*
- * The spp process / main thread allocates one of these
- * at startup; its main input queue. The spp main input queue
+ * The vpp process / main thread allocates one of these
+ * at startup; its main input queue. The vpp main input queue
* has a pointer to it in the shared memory segment header.
*
* You probably want to be on an svm data heap before calling this
q->signal_when_queue_non_empty = signal_when_queue_non_empty;
memset (&attr, 0, sizeof (attr));
- memset (&cattr, 0, sizeof (attr));
+ memset (&cattr, 0, sizeof (cattr));
if (pthread_mutexattr_init (&attr))
clib_unix_warning ("mutexattr_init");
clib_memcpy (elem, headp, q->elsize);
q->head++;
+ /* $$$$ JFC shouldn't this be == 0? */
if (q->cursize == q->maxsize)
need_broadcast = 1;
pthread_cond_t condvar; /* 8 bytes */
int head;
int tail;
- int cursize;
+ volatile int cursize;
int maxsize;
int elsize;
int consumer_pid;
vnet/ip/ip_input_acl.c \
vnet/ip/lookup.c \
vnet/ip/ping.c \
- vnet/ip/punt.c \
- vnet/ip/udp_format.c \
- vnet/ip/udp_init.c \
- vnet/ip/udp_local.c \
- vnet/ip/udp_pg.c
+ vnet/ip/punt.c
nobase_include_HEADERS += \
vnet/ip/format.h \
vnet/ip/ports.def \
vnet/ip/protocols.def \
vnet/ip/punt_error.def \
- vnet/ip/punt.h \
- vnet/ip/tcp_packet.h \
- vnet/ip/udp_error.def \
- vnet/ip/udp.h \
- vnet/ip/udp_packet.h
+ vnet/ip/punt.h
API_FILES += vnet/ip/ip.api
test_map_LDFLAGS = -static
endif
+########################################
+# Layer 4 protocol: tcp
+########################################
+libvnet_la_SOURCES += \
+ vnet/tcp/tcp_format.c \
+ vnet/tcp/tcp_pg.c \
+ vnet/tcp/tcp_syn_filter4.c \
+ vnet/tcp/tcp_output.c \
+ vnet/tcp/tcp_input.c \
+ vnet/tcp/tcp_newreno.c \
+ vnet/tcp/tcp.c
+
+nobase_include_HEADERS += \
+ vnet/tcp/tcp_packet.h \
+ vnet/tcp/tcp_timer.h \
+ vnet/tcp/tcp.h
+
+########################################
+# Layer 4 protocol: udp
+########################################
+libvnet_la_SOURCES += \
+ vnet/udp/udp.c \
+ vnet/udp/udp_input.c \
+ vnet/udp/builtin_server.c \
+ vnet/udp/udp_format.c \
+ vnet/udp/udp_local.c \
+ vnet/udp/udp_pg.c
+
+nobase_include_HEADERS += \
+ vnet/udp/udp_error.def \
+ vnet/udp/udp.h \
+ vnet/udp/udp_packet.h
########################################
# Tunnel protocol: gre
nobase_include_HEADERS += \
vnet/devices/ssvm/ssvm_eth.h
+########################################
+# session managmeent
+########################################
+
+libvnet_la_SOURCES += \
+ vnet/session/session.c \
+ vnet/session/node.c \
+ vnet/session/transport.c \
+ vnet/session/application.c \
+ vnet/session/session_cli.c \
+ vnet/session/hashes.c \
+ vnet/session/application_interface.c \
+ vnet/session/session_api.c
+
+nobase_include_HEADERS += \
+ vnet/session/session.h \
+ vnet/session/application.h \
+ vnet/session/transport.h \
+ vnet/session/application_interface.h
+
+API_FILES += vnet/session/session.api
+
########################################
# Linux packet interface
########################################
_(INVALID_SUB_SW_IF_INDEX, -98, "Invalid sub-interface sw_if_index") \
_(TABLE_TOO_BIG, -99, "Table too big") \
_(CANNOT_ENABLE_DISABLE_FEATURE, -100, "Cannot enable/disable feature") \
-_(BFD_EEXIST, -101, "Duplicate BFD object") \
-_(BFD_ENOENT, -102, "No such BFD object") \
-_(BFD_EINUSE, -103, "BFD object in use") \
-_(BFD_NOTSUPP, -104, "BFD feature not supported") \
-_(LISP_RLOC_LOCAL, -105, "RLOC address is local") \
-_(BFD_EAGAIN, -106, "BFD object cannot be manipulated at this time") \
-_(INVALID_GPE_MODE, -107, "Invalid GPE mode") \
-_(LISP_GPE_ENTRIES_PRESENT, -108, "LISP GPE entries are present")
+_(BFD_EEXIST, -101, "Duplicate BFD object") \
+_(BFD_ENOENT, -102, "No such BFD object") \
+_(BFD_EINUSE, -103, "BFD object in use") \
+_(BFD_NOTSUPP, -104, "BFD feature not supported") \
+_(ADDRESS_IN_USE, -105, "Address in use") \
+_(ADDRESS_NOT_IN_USE, -106, "Address not in use") \
+_(QUEUE_FULL, -107, "Queue full") \
+_(UNKNOWN_URI_TYPE, -108, "Unknown URI type") \
+_(URI_FIFO_CREATE_FAILED, -109, "URI FIFO segment create failed") \
+_(LISP_RLOC_LOCAL, -110, "RLOC address is local") \
+_(BFD_EAGAIN, -111, "BFD object cannot be manipulated at this time") \
+_(INVALID_GPE_MODE, -112, "Invalid GPE mode") \
+_(LISP_GPE_ENTRIES_PRESENT, -113, "LISP GPE entries are present")
typedef enum
{
#include <vlib/buffer.h>
#include <vnet/ip/format.h>
#include <vnet/ethernet/packet.h>
-#include <vnet/ip/udp_packet.h>
+#include <vnet/udp/udp_packet.h>
+#include <vnet/udp/udp.h>
#include <vnet/ip/lookup.h>
#include <vnet/ip/icmp46_packet.h>
#include <vnet/ip/ip4.h>
#include <vnet/ip/ip6.h>
-#include <vnet/ip/udp.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/adj/adj.h>
#include <vnet/adj/adj_nbr.h>
u16 buffer_advance;
} device_input_feat;
+ /* TCP */
+ struct
+ {
+ u32 connection_index;
+ u32 seq_number;
+ u32 seq_end;
+ u32 ack_number;
+ u8 flags;
+ } tcp;
+
u32 unused[6];
};
} vnet_buffer_opaque_t;
}
#define foreach_tcp_proto_field \
-_(src_port) \
-_(dst_port)
+_(src) \
+_(dst)
#define foreach_udp_proto_field \
_(src_port) \
#include <vnet/ip/ip4_packet.h>
#include <vnet/pg/pg.h>
#include <vnet/ip/format.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
typedef enum {
#define dhcp_proxy_error(n,s) DHCP_PROXY_ERROR_##n,
#include <vnet/ip/ip_packet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vlib/cli.h>
#include <vppinfra/error.h>
#include <vppinfra/hash.h>
#include <vnet/ip/ip_packet.h>
#include <vnet/ip/lookup.h>
-#include <vnet/ip/tcp_packet.h>
-#include <vnet/ip/udp_packet.h>
+#include <vnet/tcp/tcp_packet.h>
+#include <vnet/udp/udp_packet.h>
#include <vnet/ip/icmp46_packet.h>
#include <vnet/ip/ip4.h>
b = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t1 : t2;
b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? ip->protocol : 0;
- t1 = is_tcp_udp ? tcp->ports.src : 0;
- t2 = is_tcp_udp ? tcp->ports.dst : 0;
+ t1 = is_tcp_udp ? tcp->src : 0;
+ t2 = is_tcp_udp ? tcp->dst : 0;
t1 = (flow_hash_config & IP_FLOW_HASH_SRC_PORT) ? t1 : 0;
t2 = (flow_hash_config & IP_FLOW_HASH_DST_PORT) ? t2 : 0;
u32 ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0);
+#define IP_DF 0x4000 /* don't fragment */
+
+/**
+ * Push IPv4 header to buffer
+ *
+ * This does not support fragmentation.
+ *
+ * @param vm - vlib_main
+ * @param b - buffer to write the header to
+ * @param src - source IP
+ * @param dst - destination IP
+ * @param prot - payload proto
+ *
+ * @return - pointer to start of IP header
+ */
+always_inline void *
+vlib_buffer_push_ip4 (vlib_main_t * vm, vlib_buffer_t * b,
+ ip4_address_t * src, ip4_address_t * dst, int proto)
+{
+ ip4_header_t *ih;
+
+ /* make some room */
+ ih = vlib_buffer_push_uninit (b, sizeof (ip4_header_t));
+
+ ih->ip_version_and_header_length = 0x45;
+ ih->tos = 0;
+ ih->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b));
+
+ /* No fragments */
+ ih->flags_and_fragment_offset = clib_host_to_net_u16 (IP_DF);
+ ih->ttl = 255;
+ ih->protocol = proto;
+ ih->src_address.as_u32 = src->as_u32;
+ ih->dst_address.as_u32 = dst->as_u32;
+
+ ih->checksum = ip4_header_checksum (ih);
+ return ih;
+}
#endif /* included_ip_ip4_h */
/*
return p0->flags;
}
-static uword
-ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
+/* *INDENT-OFF* */
+VNET_FEATURE_ARC_INIT (ip4_local) =
+{
+ .arc_name = "ip4-local",
+ .start_nodes = VNET_FEATURES ("ip4-local"),
+};
+/* *INDENT-ON* */
+
+static inline uword
+ip4_local_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int head_of_feature_arc)
{
ip4_main_t *im = &ip4_main;
ip_lookup_main_t *lm = &im->lookup_main;
u32 *from, *to_next, n_left_from, n_left_to_next;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_input_node.index);
+ u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
i32 len_diff0, len_diff1;
u8 error0, is_udp0, is_tcp_udp0, good_tcp_udp0, proto0;
u8 error1, is_udp1, is_tcp_udp1, good_tcp_udp1, proto1;
- u8 enqueue_code;
+ u32 sw_if_index0, sw_if_index1;
pi0 = to_next[0] = from[0];
pi1 = to_next[1] = from[1];
to_next += 2;
n_left_to_next -= 2;
+ next0 = next1 = IP_LOCAL_NEXT_DROP;
+
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data;
- fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (p1)->sw_if_index[VLIB_RX];
+
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index0);
+ fib_index1 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index1);
+
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index0);
fib_index0 =
(vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
(u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
- fib_index1 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p1)->sw_if_index[VLIB_RX]);
+ fib_index1 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index1);
fib_index1 =
(vnet_buffer (p1)->sw_if_index[VLIB_TX] ==
(u32) ~ 0) ? fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];
until support of IP frag reassembly is implemented */
proto0 = ip4_is_fragment (ip0) ? 0xfe : ip0->protocol;
proto1 = ip4_is_fragment (ip1) ? 0xfe : ip1->protocol;
+
+ if (head_of_feature_arc == 0)
+ {
+ error0 = error1 = IP4_ERROR_UNKNOWN_PROTOCOL;
+ goto skip_checks;
+ }
+
is_udp0 = proto0 == IP_PROTOCOL_UDP;
is_udp1 = proto1 == IP_PROTOCOL_UDP;
is_tcp_udp0 = is_udp0 || proto0 == IP_PROTOCOL_TCP;
next0 = lm->local_next_by_ip_protocol[proto0];
next1 = lm->local_next_by_ip_protocol[proto1];
+ skip_checks:
next0 =
error0 != IP4_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
next1 =
p0->error = error0 ? error_node->errors[error0] : 0;
p1->error = error1 ? error_node->errors[error1] : 0;
- enqueue_code = (next0 != next_index) + 2 * (next1 != next_index);
-
- if (PREDICT_FALSE (enqueue_code != 0))
+ if (head_of_feature_arc)
{
- switch (enqueue_code)
- {
- case 1:
- /* A B A */
- to_next[-2] = pi1;
- to_next -= 1;
- n_left_to_next += 1;
- vlib_set_next_frame_buffer (vm, node, next0, pi0);
- break;
-
- case 2:
- /* A A B */
- to_next -= 1;
- n_left_to_next += 1;
- vlib_set_next_frame_buffer (vm, node, next1, pi1);
- break;
-
- case 3:
- /* A B B or A B C */
- to_next -= 2;
- n_left_to_next += 2;
- vlib_set_next_frame_buffer (vm, node, next0, pi0);
- vlib_set_next_frame_buffer (vm, node, next1, pi1);
- if (next0 == next1)
- {
- vlib_put_next_frame (vm, node, next_index,
- n_left_to_next);
- next_index = next1;
- vlib_get_next_frame (vm, node, next_index, to_next,
- n_left_to_next);
- }
- break;
- }
+ if (PREDICT_TRUE (error0 == (u8) IP4_ERROR_UNKNOWN_PROTOCOL))
+ vnet_feature_arc_start (arc_index, sw_if_index0, &next0, p0);
+ if (PREDICT_TRUE (error1 == (u8) IP4_ERROR_UNKNOWN_PROTOCOL))
+ vnet_feature_arc_start (arc_index, sw_if_index1, &next1, p1);
}
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, pi1,
+ next0, next1);
}
while (n_left_from > 0 && n_left_to_next > 0)
u8 error0, is_udp0, is_tcp_udp0, good_tcp_udp0, proto0;
load_balance_t *lb0;
const dpo_id_t *dpo0;
+ u32 sw_if_index0;
pi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_to_next -= 1;
+ next0 = IP_LOCAL_NEXT_DROP;
+
p0 = vlib_get_buffer (vm, pi0);
ip0 = vlib_buffer_get_current (p0);
vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
- fib_index0 = vec_elt (im->fib_index_by_sw_if_index,
- vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+
+ fib_index0 = vec_elt (im->fib_index_by_sw_if_index, sw_if_index0);
+
fib_index0 =
(vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
(u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
/* Treat IP frag packets as "experimental" protocol for now
until support of IP frag reassembly is implemented */
proto0 = ip4_is_fragment (ip0) ? 0xfe : ip0->protocol;
+
+ if (head_of_feature_arc == 0)
+ {
+ error0 = IP4_ERROR_UNKNOWN_PROTOCOL;
+ goto skip_check;
+ }
+
is_udp0 = proto0 == IP_PROTOCOL_UDP;
is_tcp_udp0 = is_udp0 || proto0 == IP_PROTOCOL_TCP;
ip0->dst_address.as_u32 != 0xFFFFFFFF)
? IP4_ERROR_SRC_LOOKUP_MISS : error0);
+ skip_check:
+
next0 = lm->local_next_by_ip_protocol[proto0];
next0 =
p0->error = error0 ? error_node->errors[error0] : 0;
- if (PREDICT_FALSE (next0 != next_index))
+ if (head_of_feature_arc)
{
- n_left_to_next += 1;
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-
- next_index = next0;
- vlib_get_next_frame (vm, node, next_index, to_next,
- n_left_to_next);
- to_next[0] = pi0;
- to_next += 1;
- n_left_to_next -= 1;
+ if (PREDICT_TRUE (error0 == (u8) IP4_ERROR_UNKNOWN_PROTOCOL))
+ vnet_feature_arc_start (arc_index, sw_if_index0, &next0, p0);
}
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, next0);
+
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
return frame->n_vectors;
}
+static uword
+ip4_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip4_local_inline (vm, node, frame, 1 /* head of feature arc */ );
+}
+
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip4_local_node) =
{
- .function = ip4_local,.name = "ip4-local",.vector_size =
- sizeof (u32),.format_trace =
- format_ip4_forward_next_trace,.n_next_nodes =
- IP_LOCAL_N_NEXT,.next_nodes =
+ .function = ip4_local,
+ .name = "ip4-local",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_forward_next_trace,
+ .n_next_nodes = IP_LOCAL_N_NEXT,
+ .next_nodes =
{
- [IP_LOCAL_NEXT_DROP] = "error-drop",
- [IP_LOCAL_NEXT_PUNT] = "error-punt",
- [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip4-udp-lookup",
- [IP_LOCAL_NEXT_ICMP] = "ip4-icmp-input",}
-,};
+ [IP_LOCAL_NEXT_DROP] = "error-drop",
+ [IP_LOCAL_NEXT_PUNT] = "error-punt",
+ [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip4-udp-lookup",
+ [IP_LOCAL_NEXT_ICMP] = "ip4-icmp-input",},
+};
+/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (ip4_local_node, ip4_local);
+static uword
+ip4_local_end_of_arc (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip4_local_inline (vm, node, frame, 0 /* head of feature arc */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_local_end_of_arc_node,static) = {
+ .function = ip4_local_end_of_arc,
+ .name = "ip4-local-end-of-arc",
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_ip4_forward_next_trace,
+ .sibling_of = "ip4-local",
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_local_end_of_arc_node, ip4_local_end_of_arc)
+
+VNET_FEATURE_INIT (ip4_local_end_of_arc, static) = {
+ .arc_name = "ip4-local",
+ .node_name = "ip4-local-end-of-arc",
+ .runs_before = 0, /* not before any other features */
+};
+/* *INDENT-ON* */
+
void
ip4_register_protocol (u32 protocol, u32 node_index)
{
#define included_ip4_packet_h
#include <vnet/ip/ip_packet.h> /* for ip_csum_t */
-#include <vnet/ip/tcp_packet.h> /* for tcp_header_t */
+#include <vnet/tcp/tcp_packet.h> /* for tcp_header_t */
#include <vppinfra/byte_order.h> /* for clib_net_to_host_u16 */
/* IP4 address which can be accessed either as 4 bytes
ip0->src_address.data_u32 = dst0;
ip0->dst_address.data_u32 = src0;
- src0 = tcp0->ports.src;
- dst0 = tcp0->ports.dst;
- tcp0->ports.src = dst0;
- tcp0->ports.dst = src0;
+ src0 = tcp0->src;
+ dst0 = tcp0->dst;
+ tcp0->src = dst0;
+ tcp0->dst = src0;
}
always_inline void
ip0->dst_address.data_u32 = src0;
ip1->dst_address.data_u32 = src1;
- src0 = tcp0->ports.src;
- src1 = tcp1->ports.src;
- dst0 = tcp0->ports.dst;
- dst1 = tcp1->ports.dst;
- tcp0->ports.src = dst0;
- tcp1->ports.src = dst1;
- tcp0->ports.dst = src0;
- tcp1->ports.dst = src1;
+ src0 = tcp0->src;
+ src1 = tcp1->src;
+ dst0 = tcp0->dst;
+ dst1 = tcp1->dst;
+ tcp0->src = dst0;
+ tcp1->src = dst1;
+ tcp0->dst = src0;
+ tcp1->dst = src1;
}
#endif /* included_ip4_packet_h */
b = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t1 : t2;
b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? ip->protocol : 0;
- t1 = is_tcp_udp ? tcp->ports.src : 0;
- t2 = is_tcp_udp ? tcp->ports.dst : 0;
+ t1 = is_tcp_udp ? tcp->src : 0;
+ t2 = is_tcp_udp ? tcp->dst : 0;
t1 = (flow_hash_config & IP_FLOW_HASH_SRC_PORT) ? t1 : 0;
t2 = (flow_hash_config & IP_FLOW_HASH_DST_PORT) ? t2 : 0;
int ip6_hbh_unregister_option (u8 option);
void ip6_hbh_set_next_override (uword next);
+/**
+ * Push IPv6 header to buffer
+ *
+ * @param vm - vlib_main
+ * @param b - buffer to write the header to
+ * @param src - source IP
+ * @param dst - destination IP
+ * @param prot - payload proto
+ *
+ * @return - pointer to start of IP header
+ */
+always_inline void *
+vlib_buffer_push_ip6 (vlib_main_t * vm, vlib_buffer_t * b,
+ ip6_address_t * src, ip6_address_t * dst, int proto)
+{
+ ip6_header_t *ip6h;
+ u16 payload_length;
+
+ /* make some room */
+ ip6h = vlib_buffer_push_uninit (b, sizeof (ip6_header_t));
+
+ ip6h->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 (0x6 << 28);
+
+ /* calculate ip6 payload length */
+ payload_length = vlib_buffer_length_in_chain (vm, b);
+ payload_length -= sizeof (*ip6h);
+
+ ip6h->payload_length = clib_host_to_net_u16 (payload_length);
+
+ ip6h->hop_limit = 0xff;
+ ip6h->protocol = proto;
+ clib_memcpy (ip6h->src_address.as_u8, src->as_u8,
+ sizeof (ip6h->src_address));
+ clib_memcpy (ip6h->dst_address.as_u8, dst->as_u8,
+ sizeof (ip6h->src_address));
+
+ return ip6h;
+}
+
#endif /* included_ip_ip6_h */
/*
#ifndef included_ip6_packet_h
#define included_ip6_packet_h
-#include <vnet/ip/tcp_packet.h>
+#include <vnet/tcp/tcp_packet.h>
#include <vnet/ip/ip4_packet.h>
typedef union
{
u16 src0, dst0;
- src0 = tcp0->ports.src;
- dst0 = tcp0->ports.dst;
- tcp0->ports.src = dst0;
- tcp0->ports.dst = src0;
+ src0 = tcp0->src;
+ dst0 = tcp0->dst;
+ tcp0->src = dst0;
+ tcp0->dst = src0;
}
}
{
u16 src0, dst0, src1, dst1;
- src0 = tcp0->ports.src;
- src1 = tcp1->ports.src;
- dst0 = tcp0->ports.dst;
- dst1 = tcp1->ports.dst;
- tcp0->ports.src = dst0;
- tcp1->ports.src = dst1;
- tcp0->ports.dst = src0;
- tcp1->ports.dst = src1;
+ src0 = tcp0->src;
+ src1 = tcp1->src;
+ dst0 = tcp0->dst;
+ dst1 = tcp1->dst;
+ tcp0->src = dst0;
+ tcp1->src = dst1;
+ tcp0->dst = src0;
+ tcp1->dst = src1;
}
}
*/
#include <vlib/vlib.h>
#include <vnet/pg/pg.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/ip/punt.h>
#define foreach_punt_next \
+++ /dev/null
-/*
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/*
- * ip4/tcp_packet.h: TCP packet format (see RFC 793)
- *
- * Copyright (c) 2008 Eliot Dresselhaus
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#ifndef included_tcp_packet_h
-#define included_tcp_packet_h
-
-/* TCP flags bit 0 first. */
-#define foreach_tcp_flag \
- _ (FIN) \
- _ (SYN) \
- _ (RST) \
- _ (PSH) \
- _ (ACK) \
- _ (URG) \
- _ (ECE) \
- _ (CWR)
-
-enum
-{
-#define _(f) TCP_FLAG_BIT_##f,
- foreach_tcp_flag
-#undef _
- TCP_N_FLAG_BITS,
-
-#define _(f) TCP_FLAG_##f = 1 << TCP_FLAG_BIT_##f,
- foreach_tcp_flag
-#undef _
-};
-
-typedef struct
-{
- /* Source and destination port. */
- union
- {
- union
- {
- struct
- {
- u16 src, dst;
- };
- u32 src_and_dst;
- } ports;
- struct
- {
- u16 src_port, dst_port;
- };
- };
-
- /* Sequence and acknowledgment number. */
- u32 seq_number, ack_number;
-
- /* Size of TCP header in 32-bit units plus 4 reserved bits. */
- u8 tcp_header_u32s_and_reserved;
-
- /* see foreach_tcp_flag for enumation of tcp flags. */
- u8 flags;
-
- /* Current window advertised by sender.
- This is the number of bytes sender is willing to receive
- right now. */
- u16 window;
-
- /* Checksum of TCP pseudo header and data. */
- u16 checksum;
-
- u16 urgent_pointer;
-} tcp_header_t;
-
-always_inline int
-tcp_header_bytes (tcp_header_t * t)
-{
- return (t->tcp_header_u32s_and_reserved >> 4) * sizeof (u32);
-}
-
-/* TCP options. */
-typedef enum tcp_option_type
-{
- TCP_OPTION_END = 0,
- TCP_OPTION_NOP = 1,
- TCP_OPTION_MSS = 2,
- TCP_OPTION_WINDOW_SCALE = 3,
- TCP_OPTION_SACK_PERMITTED = 4,
- TCP_OPTION_SACK_BLOCK = 5,
- TCP_OPTION_TIME_STAMP = 8,
-} tcp_option_type_t;
-
-/* All except NOP and END have 1 byte length field. */
-typedef struct
-{
- tcp_option_type_t type:8;
-
- /* Length of this option in bytes. */
- u8 length;
-} tcp_option_with_length_t;
-
-#endif /* included_tcp_packet_h */
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
+++ /dev/null
-/*
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/*
- * ip/udp_init.c: udp initialization
- *
- * Copyright (c) 2008 Eliot Dresselhaus
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include <vnet/ip/ip.h>
-
-clib_error_t *
-udp_init (vlib_main_t * vm)
-{
- ip_main_t *im = &ip_main;
- ip_protocol_info_t *pi;
- clib_error_t *error;
-
- error = vlib_call_init_function (vm, ip_main_init);
-
- if (!error)
- {
- pi = ip_get_protocol_info (im, IP_PROTOCOL_UDP);
- if (pi == 0)
- return clib_error_return (0, "UDP protocol info AWOL");
- pi->format_header = format_udp_header;
- pi->unformat_pg_edit = unformat_pg_udp_header;
- }
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (udp_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/ikev2.h>
#include <vnet/ipsec/ikev2_priv.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/ipsec/ikev2.h>
#include <vnet/ipsec/ikev2_priv.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/ipsec/ikev2.h>
#include <vnet/ipsec/ikev2_priv.h>
#include <openssl/obj_mac.h>
#include <vnet/lisp-cp/packets.h>
#include <vnet/lisp-cp/lisp_cp_messages.h>
-#include <vnet/ip/udp_packet.h>
+#include <vnet/udp/udp_packet.h>
/* Returns IP ID for the packet */
/* static u16 ip_id = 0;
return uh;
}
-void *
-pkt_push_ipv4 (vlib_main_t * vm, vlib_buffer_t * b, ip4_address_t * src,
- ip4_address_t * dst, int proto)
-{
- ip4_header_t *ih;
-
- /* make some room */
- ih = vlib_buffer_push_uninit (b, sizeof (ip4_header_t));
-
- ih->ip_version_and_header_length = 0x45;
- ih->tos = 0;
- ih->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b));
-
- /* iph->fragment_id = clib_host_to_net_u16(get_IP_ID ()); */
-
- /* TODO: decide if we allow fragments in case of control */
- ih->flags_and_fragment_offset = clib_host_to_net_u16 (IP_DF);
- ih->ttl = 255;
- ih->protocol = proto;
- ih->src_address.as_u32 = src->as_u32;
- ih->dst_address.as_u32 = dst->as_u32;
-
- ih->checksum = ip4_header_checksum (ih);
- return ih;
-}
-
-void *
-pkt_push_ipv6 (vlib_main_t * vm, vlib_buffer_t * b, ip6_address_t * src,
- ip6_address_t * dst, int proto)
-{
- ip6_header_t *ip6h;
- u16 payload_length;
-
- /* make some room */
- ip6h = vlib_buffer_push_uninit (b, sizeof (ip6_header_t));
-
- ip6h->ip_version_traffic_class_and_flow_label =
- clib_host_to_net_u32 (0x6 << 28);
-
- /* calculate ip6 payload length */
- payload_length = vlib_buffer_length_in_chain (vm, b);
- payload_length -= sizeof (*ip6h);
-
- ip6h->payload_length = clib_host_to_net_u16 (payload_length);
-
- ip6h->hop_limit = 0xff;
- ip6h->protocol = proto;
- clib_memcpy (ip6h->src_address.as_u8, src->as_u8,
- sizeof (ip6h->src_address));
- clib_memcpy (ip6h->dst_address.as_u8, dst->as_u8,
- sizeof (ip6h->src_address));
-
- return ip6h;
-}
-
void *
pkt_push_ip (vlib_main_t * vm, vlib_buffer_t * b, ip_address_t * src,
ip_address_t * dst, u32 proto)
switch (ip_addr_version (src))
{
case IP4:
- return pkt_push_ipv4 (vm, b, &ip_addr_v4 (src), &ip_addr_v4 (dst),
- proto);
+ return vlib_buffer_push_ip4 (vm, b, &ip_addr_v4 (src),
+ &ip_addr_v4 (dst), proto);
break;
case IP6:
- return pkt_push_ipv6 (vm, b, &ip_addr_v6 (src), &ip_addr_v6 (dst),
- proto);
+ return vlib_buffer_push_ip6 (vm, b, &ip_addr_v6 (src),
+ &ip_addr_v6 (dst), proto);
break;
}
void *pkt_push_ecm_hdr (vlib_buffer_t * b);
-always_inline u8 *
-vlib_buffer_get_tail (vlib_buffer_t * b)
-{
- return b->data + b->current_data + b->current_length;
-}
-
-always_inline void *
-vlib_buffer_put_uninit (vlib_buffer_t * b, u8 size)
-{
- /* XXX should make sure there's enough space! */
- void *p = vlib_buffer_get_tail (b);
- b->current_length += size;
- return p;
-}
-
-always_inline void *
-vlib_buffer_push_uninit (vlib_buffer_t * b, u8 size)
-{
- /* XXX should make sure there's enough space! */
- ASSERT (b->current_data >= size);
- b->current_data -= size;
- b->current_length += size;
-
- return vlib_buffer_get_current (b);
-}
-
-always_inline void *
-vlib_buffer_make_headroom (vlib_buffer_t * b, u8 size)
-{
- /* XXX should make sure there's enough space! */
- b->current_data += size;
- return vlib_buffer_get_current (b);
-}
-
-always_inline void *
-vlib_buffer_pull (vlib_buffer_t * b, u8 size)
-{
- if (b->current_length < size)
- return 0;
-
- void *data = vlib_buffer_get_current (b);
- vlib_buffer_advance (b, size);
- return data;
-}
-
/* *INDENT-ON* */
/*
#include <vppinfra/hash.h>
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/lisp-gpe/lisp_gpe.h>
#include <vnet/lisp-gpe/lisp_gpe_fwd_entry.h>
#include <vnet/l2/l2_input.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/lisp-cp/lisp_types.h>
#include <vnet/lisp-gpe/lisp_gpe_packet.h>
#include <vnet/adj/adj_types.h>
+#include <vppinfra/bihash_24_8.h>
+#include <vppinfra/bihash_template.h>
/** IP4-UDP-LISP encap header */
/* *INDENT-OFF* */
#include <vnet/lisp-gpe/lisp_gpe_tunnel.h>
#include <vnet/fib/fib_entry.h>
#include <vnet/adj/adj_midchain.h>
+#include <vppinfra/bihash_24_8.h>
+#include <vppinfra/bihash_template.h>
/**
* Memory pool of all adjacencies
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/session/application.h>
+#include <vnet/session/session.h>
+
+/*
+ * Pool from which we allocate all applications
+ */
+static application_t *app_pool;
+
+/*
+ * Hash table of apps by api client index
+ */
+static uword *app_by_api_client_index;
+
+int
+application_api_queue_is_full (application_t * app)
+{
+ unix_shared_memory_queue_t *q;
+
+ /* builtin servers are always OK */
+ if (app->api_client_index == ~0)
+ return 0;
+
+ q = vl_api_client_index_to_input_queue (app->api_client_index);
+ if (!q)
+ return 1;
+
+ if (q->cursize == q->maxsize)
+ return 1;
+ return 0;
+}
+
+static void
+application_table_add (application_t * app)
+{
+ hash_set (app_by_api_client_index, app->api_client_index, app->index);
+}
+
+static void
+application_table_del (application_t * app)
+{
+ hash_unset (app_by_api_client_index, app->api_client_index);
+}
+
+application_t *
+application_lookup (u32 api_client_index)
+{
+ uword *p;
+ p = hash_get (app_by_api_client_index, api_client_index);
+ if (p)
+ return application_get (p[0]);
+
+ return 0;
+}
+
+void
+application_del (application_t * app)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ api_main_t *am = &api_main;
+ void *oldheap;
+ session_manager_t *sm;
+
+ if (app->mode == APP_SERVER)
+ {
+ sm = session_manager_get (app->session_manager_index);
+ session_manager_del (smm, sm);
+ }
+
+ /* Free the event fifo in the /vpe-api shared-memory segment */
+ oldheap = svm_push_data_heap (am->vlib_rp);
+ if (app->event_queue)
+ unix_shared_memory_queue_free (app->event_queue);
+ svm_pop_heap (oldheap);
+
+ application_table_del (app);
+
+ pool_put (app_pool, app);
+}
+
+application_t *
+application_new (application_type_t type, session_type_t sst,
+ u32 api_client_index, u32 flags, session_cb_vft_t * cb_fns)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ api_main_t *am = &api_main;
+ application_t *app;
+ void *oldheap;
+ session_manager_t *sm;
+
+ pool_get (app_pool, app);
+ memset (app, 0, sizeof (*app));
+
+ /* Allocate event fifo in the /vpe-api shared-memory segment */
+ oldheap = svm_push_data_heap (am->vlib_rp);
+
+ /* Allocate server event queue */
+ app->event_queue =
+ unix_shared_memory_queue_init (128 /* nels $$$$ config */ ,
+ sizeof (session_fifo_event_t),
+ 0 /* consumer pid */ ,
+ 0
+ /* (do not) signal when queue non-empty */
+ );
+
+ svm_pop_heap (oldheap);
+
+ /* If a server, allocate session manager */
+ if (type == APP_SERVER)
+ {
+ pool_get (smm->session_managers, sm);
+ memset (sm, 0, sizeof (*sm));
+
+ app->session_manager_index = sm - smm->session_managers;
+ }
+ else if (type == APP_CLIENT)
+ {
+ /* Allocate connect session manager if needed */
+ if (smm->connect_manager_index[sst] == INVALID_INDEX)
+ connects_session_manager_init (smm, sst);
+ app->session_manager_index = smm->connect_manager_index[sst];
+ }
+
+ app->mode = type;
+ app->index = application_get_index (app);
+ app->session_type = sst;
+ app->api_client_index = api_client_index;
+ app->flags = flags;
+ app->cb_fns = *cb_fns;
+
+ /* Add app to lookup by api_client_index table */
+ application_table_add (app);
+
+ return app;
+}
+
+application_t *
+application_get (u32 index)
+{
+ return pool_elt_at_index (app_pool, index);
+}
+
+u32
+application_get_index (application_t * app)
+{
+ return app - app_pool;
+}
+
+int
+application_server_init (application_t * server, u32 segment_size,
+ u32 add_segment_size, u32 rx_fifo_size,
+ u32 tx_fifo_size, u8 ** segment_name)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ session_manager_t *sm;
+ int rv;
+
+ sm = session_manager_get (server->session_manager_index);
+
+ /* Add first segment */
+ if ((rv = session_manager_add_first_segment (smm, sm, segment_size,
+ segment_name)))
+ {
+ return rv;
+ }
+
+ /* Setup session manager */
+ sm->add_segment_size = add_segment_size;
+ sm->rx_fifo_size = rx_fifo_size;
+ sm->tx_fifo_size = tx_fifo_size;
+ sm->add_segment = sm->add_segment_size != 0;
+ return 0;
+}
+
+u8 *
+format_application_server (u8 * s, va_list * args)
+{
+ application_t *srv = va_arg (*args, application_t *);
+ int verbose = va_arg (*args, int);
+ vl_api_registration_t *regp;
+ stream_session_t *listener;
+ u8 *server_name, *str, *seg_name;
+ u32 segment_size;
+
+ if (srv == 0)
+ {
+ if (verbose)
+ s = format (s, "%-40s%-20s%-15s%-15s%-10s", "Connection", "Server",
+ "Segment", "API Client", "Cookie");
+ else
+ s = format (s, "%-40s%-20s", "Connection", "Server");
+
+ return s;
+ }
+
+ regp = vl_api_client_index_to_registration (srv->api_client_index);
+ if (!regp)
+ server_name = format (0, "%s%c", regp->name, 0);
+ else
+ server_name = regp->name;
+
+ listener = stream_session_listener_get (srv->session_type,
+ srv->session_index);
+ str = format (0, "%U", format_stream_session, listener, verbose);
+
+ session_manager_get_segment_info (listener->server_segment_index, &seg_name,
+ &segment_size);
+ if (verbose)
+ {
+ s = format (s, "%-40s%-20s%-20s%-10d%-10d", str, server_name,
+ seg_name, srv->api_client_index, srv->accept_cookie);
+ }
+ else
+ s = format (s, "%-40s%-20s", str, server_name);
+ return s;
+}
+
+u8 *
+format_application_client (u8 * s, va_list * args)
+{
+ application_t *client = va_arg (*args, application_t *);
+ int verbose = va_arg (*args, int);
+ stream_session_t *session;
+ u8 *str, *seg_name;
+ u32 segment_size;
+
+ if (client == 0)
+ {
+ if (verbose)
+ s =
+ format (s, "%-40s%-20s%-10s", "Connection", "Segment",
+ "API Client");
+ else
+ s = format (s, "%-40s", "Connection");
+
+ return s;
+ }
+
+ session = stream_session_get (client->session_index, client->thread_index);
+ str = format (0, "%U", format_stream_session, session, verbose);
+
+ session_manager_get_segment_info (session->server_segment_index, &seg_name,
+ &segment_size);
+ if (verbose)
+ {
+ s = format (s, "%-40s%-20s%-10d%", str, seg_name,
+ client->api_client_index);
+ }
+ else
+ s = format (s, "%-40s", str);
+ return s;
+}
+
+static clib_error_t *
+show_app_command_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ application_t *app;
+ int do_server = 0;
+ int do_client = 0;
+ int verbose = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "server"))
+ do_server = 1;
+ else if (unformat (input, "client"))
+ do_client = 1;
+ else if (unformat (input, "verbose"))
+ verbose = 1;
+ else
+ break;
+ }
+
+ if (do_server)
+ {
+ if (pool_elts (app_pool))
+ {
+ vlib_cli_output (vm, "%U", format_application_server,
+ 0 /* header */ ,
+ verbose);
+ /* *INDENT-OFF* */
+ pool_foreach (app, app_pool,
+ ({
+ if (app->mode == APP_SERVER)
+ vlib_cli_output (vm, "%U", format_application_server, app,
+ verbose);
+ }));
+ /* *INDENT-ON* */
+ }
+ else
+ vlib_cli_output (vm, "No active server bindings");
+ }
+
+ if (do_client)
+ {
+ if (pool_elts (app_pool))
+ {
+ vlib_cli_output (vm, "%U", format_application_client,
+ 0 /* header */ ,
+ verbose);
+ /* *INDENT-OFF* */
+ pool_foreach (app, app_pool,
+ ({
+ if (app->mode == APP_CLIENT)
+ vlib_cli_output (vm, "%U", format_application_client, app,
+ verbose);
+ }));
+ /* *INDENT-ON* */
+ }
+ else
+ vlib_cli_output (vm, "No active server bindings");
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_app_command, static) =
+{
+.path = "show app",.short_help =
+ "show app [server|client] [verbose]",.function = show_app_command_fn,};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SRC_VNET_SESSION_APPLICATION_H_
+#define SRC_VNET_SESSION_APPLICATION_H_
+
+#include <vnet/vnet.h>
+#include <vnet/session/session.h>
+
+typedef enum
+{
+ APP_SERVER,
+ APP_CLIENT
+} application_type_t;
+
+typedef struct _stream_session_cb_vft
+{
+ /** Notify server of new segment */
+ int (*add_segment_callback) (u32 api_client_index, const u8 * seg_name,
+ u32 seg_size);
+
+ /** Notify server of newly accepted session */
+ int (*session_accept_callback) (stream_session_t * new_session);
+
+ /* Connection request callback */
+ int (*session_connected_callback) (u32 api_client_index,
+ stream_session_t * s, u8 code);
+
+ /** Notify app that session is closing */
+ void (*session_disconnect_callback) (stream_session_t * s);
+
+ /** Notify app that session was reset */
+ void (*session_reset_callback) (stream_session_t * s);
+
+ /* Direct RX callback, for built-in servers */
+ int (*builtin_server_rx_callback) (stream_session_t * session);
+
+ /* Redirect connection to local server */
+ int (*redirect_connect_callback) (u32 api_client_index, void *mp);
+} session_cb_vft_t;
+
+typedef struct _application
+{
+ /** Index in server pool */
+ u32 index;
+
+ /** Flags */
+ u32 flags;
+
+ /** Binary API connection index, ~0 if internal */
+ u32 api_client_index;
+
+ /* */
+ u32 api_context;
+
+ /** Application listens for events on this svm queue */
+ unix_shared_memory_queue_t *event_queue;
+
+ /** Stream session type */
+ u8 session_type;
+
+ /* Stream server mode: accept or connect */
+ u8 mode;
+
+ u32 session_manager_index;
+
+ /*
+ * Bind/Listen specific
+ */
+
+ /** Accept cookie, for multiple session flavors ($$$ maybe) */
+ u32 accept_cookie;
+
+ /** Index of the listen session or connect session */
+ u32 session_index;
+
+ /** Session thread index for client connect sessions */
+ u32 thread_index;
+
+ /*
+ * Callbacks: shoulder-taps for the server/client
+ */
+ session_cb_vft_t cb_fns;
+} application_t;
+
+application_t *application_new (application_type_t type, session_type_t sst,
+ u32 api_client_index, u32 flags,
+ session_cb_vft_t * cb_fns);
+void application_del (application_t * app);
+application_t *application_get (u32 index);
+application_t *application_lookup (u32 api_client_index);
+u32 application_get_index (application_t * app);
+
+int
+application_server_init (application_t * server, u32 segment_size,
+ u32 add_segment_size, u32 rx_fifo_size,
+ u32 tx_fifo_size, u8 ** segment_name);
+int application_api_queue_is_full (application_t * app);
+
+#endif /* SRC_VNET_SESSION_APPLICATION_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vnet/session/application_interface.h>
+
+#include <vnet/session/session.h>
+#include <vlibmemory/api.h>
+#include <vnet/dpo/load_balance.h>
+#include <vnet/fib/ip4_fib.h>
+
+/** @file
+ VPP's application/session API bind/unbind/connect/disconnect calls
+*/
+
+static u8
+ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4)
+{
+ if (is_ip4)
+ return (ip46_address->ip4.as_u32 == 0);
+ else
+ return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0);
+}
+
+static u8
+ip_is_local (ip46_address_t * ip46_address, u8 is_ip4)
+{
+ fib_node_index_t fei;
+ fib_entry_flag_t flags;
+ fib_prefix_t prefix;
+
+ /* Check if requester is local */
+ if (is_ip4)
+ {
+ prefix.fp_len = 32;
+ prefix.fp_proto = FIB_PROTOCOL_IP4;
+ }
+ else
+ {
+ prefix.fp_len = 128;
+ prefix.fp_proto = FIB_PROTOCOL_IP6;
+ }
+
+ clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address));
+ fei = fib_table_lookup (0, &prefix);
+ flags = fib_entry_get_flags (fei);
+
+ return (flags & FIB_ENTRY_FLAG_LOCAL);
+}
+
+int
+api_parse_session_handle (u64 handle, u32 * session_index, u32 * thread_index)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ stream_session_t *pool;
+
+ *thread_index = handle & 0xFFFFFFFF;
+ *session_index = handle >> 32;
+
+ if (*thread_index >= vec_len (smm->sessions))
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ pool = smm->sessions[*thread_index];
+
+ if (pool_is_free_index (pool, *session_index))
+ return VNET_API_ERROR_INVALID_VALUE_2;
+
+ return 0;
+}
+
+int
+vnet_bind_i (u32 api_client_index, ip46_address_t * ip46, u16 port_host_order,
+ session_type_t sst, u64 * options, session_cb_vft_t * cb_fns,
+ application_t ** app, u32 * len_seg_name, char *seg_name)
+{
+ u8 *segment_name = 0;
+ application_t *server = 0;
+ stream_session_t *listener;
+ u8 is_ip4;
+
+ listener =
+ stream_session_lookup_listener (ip46,
+ clib_host_to_net_u16 (port_host_order),
+ sst);
+
+ if (listener)
+ return VNET_API_ERROR_ADDRESS_IN_USE;
+
+ if (application_lookup (api_client_index))
+ {
+ clib_warning ("Only one bind supported for now");
+ return VNET_API_ERROR_ADDRESS_IN_USE;
+ }
+
+ is_ip4 = SESSION_TYPE_IP4_UDP == sst || SESSION_TYPE_IP4_TCP == sst;
+ if (!ip_is_zero (ip46, is_ip4) && !ip_is_local (ip46, is_ip4))
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ /* Allocate and initialize stream server */
+ server = application_new (APP_SERVER, sst, api_client_index,
+ options[SESSION_OPTIONS_FLAGS], cb_fns);
+
+ application_server_init (server, options[SESSION_OPTIONS_SEGMENT_SIZE],
+ options[SESSION_OPTIONS_ADD_SEGMENT_SIZE],
+ options[SESSION_OPTIONS_RX_FIFO_SIZE],
+ options[SESSION_OPTIONS_TX_FIFO_SIZE],
+ &segment_name);
+
+ /* Setup listen path down to transport */
+ stream_session_start_listen (server->index, ip46, port_host_order);
+
+ /*
+ * Return values
+ */
+
+ ASSERT (vec_len (segment_name) <= 128);
+ *len_seg_name = vec_len (segment_name);
+ memcpy (seg_name, segment_name, *len_seg_name);
+ *app = server;
+
+ return 0;
+}
+
+int
+vnet_unbind_i (u32 api_client_index)
+{
+ application_t *server;
+
+ /*
+ * Find the stream_server_t corresponding to the api client
+ */
+ server = application_lookup (api_client_index);
+ if (!server)
+ return VNET_API_ERROR_INVALID_VALUE_2;
+
+ /* Clear the listener */
+ stream_session_stop_listen (server->index);
+ application_del (server);
+
+ return 0;
+}
+
+int
+vnet_connect_i (u32 api_client_index, u32 api_context, session_type_t sst,
+ ip46_address_t * ip46, u16 port, u64 * options, void *mp,
+ session_cb_vft_t * cb_fns)
+{
+ stream_session_t *listener;
+ application_t *server, *app;
+
+ /*
+ * Figure out if connecting to a local server
+ */
+ listener = stream_session_lookup_listener (ip46,
+ clib_host_to_net_u16 (port),
+ sst);
+ if (listener)
+ {
+ server = application_get (listener->app_index);
+
+ /*
+ * Server is willing to have a direct fifo connection created
+ * instead of going through the state machine, etc.
+ */
+ if (server->flags & SESSION_OPTIONS_FLAGS_USE_FIFO)
+ return server->cb_fns.
+ redirect_connect_callback (server->api_client_index, mp);
+ }
+
+ /* Create client app */
+ app = application_new (APP_CLIENT, sst, api_client_index,
+ options[SESSION_OPTIONS_FLAGS], cb_fns);
+
+ app->api_context = api_context;
+
+ /*
+ * Not connecting to a local server. Create regular session
+ */
+ stream_session_open (sst, ip46, port, app->index);
+
+ return 0;
+}
+
+/**
+ * unformat a vnet URI
+ *
+ * fifo://name
+ * tcp://ip46-addr:port
+ * udp://ip46-addr:port
+ *
+ * u8 ip46_address[16];
+ * u16 port_in_host_byte_order;
+ * stream_session_type_t sst;
+ * u8 *fifo_name;
+ *
+ * if (unformat (input, "%U", unformat_vnet_uri, &ip46_address,
+ * &sst, &port, &fifo_name))
+ * etc...
+ *
+ */
+uword
+unformat_vnet_uri (unformat_input_t * input, va_list * args)
+{
+ ip46_address_t *address = va_arg (*args, ip46_address_t *);
+ session_type_t *sst = va_arg (*args, session_type_t *);
+ u16 *port = va_arg (*args, u16 *);
+
+ if (unformat (input, "tcp://%U/%d", unformat_ip4_address, &address->ip4,
+ port))
+ {
+ *sst = SESSION_TYPE_IP4_TCP;
+ return 1;
+ }
+ if (unformat (input, "udp://%U/%d", unformat_ip4_address, &address->ip4,
+ port))
+ {
+ *sst = SESSION_TYPE_IP4_UDP;
+ return 1;
+ }
+ if (unformat (input, "udp://%U/%d", unformat_ip6_address, &address->ip6,
+ port))
+ {
+ *sst = SESSION_TYPE_IP6_UDP;
+ return 1;
+ }
+ if (unformat (input, "tcp://%U/%d", unformat_ip6_address, &address->ip6,
+ port))
+ {
+ *sst = SESSION_TYPE_IP6_TCP;
+ return 1;
+ }
+
+ return 0;
+}
+
+int
+parse_uri (char *uri, session_type_t * sst, ip46_address_t * addr,
+ u16 * port_number_host_byte_order)
+{
+ unformat_input_t _input, *input = &_input;
+
+ /* Make sure */
+ uri = (char *) format (0, "%s%c", uri, 0);
+
+ /* Parse uri */
+ unformat_init_string (input, uri, strlen (uri));
+ if (!unformat (input, "%U", unformat_vnet_uri, addr, sst,
+ port_number_host_byte_order))
+ {
+ unformat_free (input);
+ return VNET_API_ERROR_INVALID_VALUE;
+ }
+ unformat_free (input);
+
+ return 0;
+}
+
+int
+vnet_bind_uri (vnet_bind_args_t * a)
+{
+ application_t *server = 0;
+ u16 port_host_order;
+ session_type_t sst = SESSION_N_TYPES;
+ ip46_address_t ip46;
+ int rv;
+
+ memset (&ip46, 0, sizeof (ip46));
+ rv = parse_uri (a->uri, &sst, &ip46, &port_host_order);
+ if (rv)
+ return rv;
+
+ if ((rv = vnet_bind_i (a->api_client_index, &ip46, port_host_order, sst,
+ a->options, a->session_cb_vft, &server,
+ &a->segment_name_length, a->segment_name)))
+ return rv;
+
+ a->server_event_queue_address = (u64) server->event_queue;
+ return 0;
+}
+
+session_type_t
+session_type_from_proto_and_ip (session_api_proto_t proto, u8 is_ip4)
+{
+ if (proto == SESSION_PROTO_TCP)
+ {
+ if (is_ip4)
+ return SESSION_TYPE_IP4_TCP;
+ else
+ return SESSION_TYPE_IP6_TCP;
+ }
+ else
+ {
+ if (is_ip4)
+ return SESSION_TYPE_IP4_UDP;
+ else
+ return SESSION_TYPE_IP6_UDP;
+ }
+
+ return SESSION_N_TYPES;
+}
+
+int
+vnet_unbind_uri (char *uri, u32 api_client_index)
+{
+ u16 port_number_host_byte_order;
+ session_type_t sst = SESSION_N_TYPES;
+ ip46_address_t ip46_address;
+ stream_session_t *listener;
+ int rv;
+
+ rv = parse_uri (uri, &sst, &ip46_address, &port_number_host_byte_order);
+ if (rv)
+ return rv;
+
+ listener =
+ stream_session_lookup_listener (&ip46_address,
+ clib_host_to_net_u16
+ (port_number_host_byte_order), sst);
+
+ if (!listener)
+ return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
+
+ /* External client? */
+ if (api_client_index != ~0)
+ {
+ ASSERT (vl_api_client_index_to_registration (api_client_index));
+ }
+
+ return vnet_unbind_i (api_client_index);
+}
+
+int
+vnet_connect_uri (vnet_connect_args_t * a)
+{
+ ip46_address_t ip46_address;
+ u16 port;
+ session_type_t sst;
+ application_t *app;
+ int rv;
+
+ app = application_lookup (a->api_client_index);
+ if (app)
+ {
+ clib_warning ("Already have a connect from this app");
+ return VNET_API_ERROR_INVALID_VALUE_2;
+ }
+
+ /* Parse uri */
+ rv = parse_uri (a->uri, &sst, &ip46_address, &port);
+ if (rv)
+ return rv;
+
+ return vnet_connect_i (a->api_client_index, a->api_context, sst,
+ &ip46_address, port, a->options, a->mp,
+ a->session_cb_vft);
+}
+
+int
+vnet_disconnect_session (u32 client_index, u32 session_index,
+ u32 thread_index)
+{
+ stream_session_t *session;
+
+ session = stream_session_get (session_index, thread_index);
+ stream_session_disconnect (session);
+
+ return 0;
+}
+
+
+int
+vnet_bind (vnet_bind_args_t * a)
+{
+ application_t *server = 0;
+ session_type_t sst = SESSION_N_TYPES;
+ int rv;
+
+ sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4);
+ if ((rv = vnet_bind_i (a->api_client_index, &a->tep.ip, a->tep.port, sst,
+ a->options, a->session_cb_vft, &server,
+ &a->segment_name_length, a->segment_name)))
+ return rv;
+
+ a->server_event_queue_address = (u64) server->event_queue;
+ a->handle = (u64) a->tep.vrf << 32 | (u64) server->session_index;
+ return 0;
+}
+
+int
+vnet_unbind (vnet_unbind_args_t * a)
+{
+ application_t *server;
+
+ if (a->api_client_index != ~0)
+ {
+ ASSERT (vl_api_client_index_to_registration (a->api_client_index));
+ }
+
+ /* Make sure this is the right one */
+ server = application_lookup (a->api_client_index);
+ ASSERT (server->session_index == (0xFFFFFFFF & a->handle));
+
+ /* TODO use handle to disambiguate namespaces/vrfs */
+ return vnet_unbind_i (a->api_client_index);
+}
+
+int
+vnet_connect (vnet_connect_args_t * a)
+{
+ session_type_t sst;
+ application_t *app;
+
+ app = application_lookup (a->api_client_index);
+ if (app)
+ {
+ clib_warning ("Already have a connect from this app");
+ return VNET_API_ERROR_INVALID_VALUE_2;
+ }
+
+ sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4);
+ return vnet_connect_i (a->api_client_index, a->api_context, sst, &a->tep.ip,
+ a->tep.port, a->options, a->mp, a->session_cb_vft);
+}
+
+int
+vnet_disconnect (vnet_disconnect_args_t * a)
+{
+ stream_session_t *session;
+ u32 session_index, thread_index;
+
+ if (api_parse_session_handle (a->handle, &session_index, &thread_index))
+ {
+ clib_warning ("Invalid handle");
+ return -1;
+ }
+
+ session = stream_session_get (session_index, thread_index);
+ stream_session_disconnect (session);
+
+ return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_uri_h__
+#define __included_uri_h__
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <svm/svm_fifo_segment.h>
+#include <vnet/session/session.h>
+#include <vnet/session/application.h>
+#include <vnet/session/transport.h>
+
+typedef enum _session_api_proto
+{
+ SESSION_PROTO_TCP,
+ SESSION_PROTO_UDP
+} session_api_proto_t;
+
+typedef struct _vnet_bind_args_t
+{
+ union
+ {
+ char *uri;
+ struct
+ {
+ transport_endpoint_t tep;
+ session_api_proto_t proto;
+ };
+ };
+
+ u32 api_client_index;
+ u64 *options;
+ session_cb_vft_t *session_cb_vft;
+
+ /*
+ * Results
+ */
+ char *segment_name;
+ u32 segment_name_length;
+ u64 server_event_queue_address;
+ u64 handle;
+} vnet_bind_args_t;
+
+typedef struct _vnet_unbind_args_t
+{
+ union
+ {
+ char *uri;
+ u64 handle;
+ };
+ u32 api_client_index;
+} vnet_unbind_args_t;
+
+typedef struct _vnet_connect_args
+{
+ union
+ {
+ char *uri;
+ struct
+ {
+ transport_endpoint_t tep;
+ session_api_proto_t proto;
+ };
+ };
+ u32 api_client_index;
+ u32 api_context;
+ u64 *options;
+ session_cb_vft_t *session_cb_vft;
+
+ /* Used for redirects */
+ void *mp;
+} vnet_connect_args_t;
+
+typedef struct _vnet_disconnect_args_t
+{
+ u64 handle;
+ u32 api_client_index;
+} vnet_disconnect_args_t;
+
+/* Bind / connect options */
+typedef enum
+{
+ SESSION_OPTIONS_FLAGS,
+ SESSION_OPTIONS_SEGMENT_SIZE,
+ SESSION_OPTIONS_ADD_SEGMENT_SIZE,
+ SESSION_OPTIONS_RX_FIFO_SIZE,
+ SESSION_OPTIONS_TX_FIFO_SIZE,
+ SESSION_OPTIONS_ACCEPT_COOKIE,
+ SESSION_OPTIONS_N_OPTIONS
+} session_options_index_t;
+
+/** Server can handle delegated connect requests from local clients */
+#define SESSION_OPTIONS_FLAGS_USE_FIFO (1<<0)
+
+/** Server wants vpp to add segments when out of memory for fifos */
+#define SESSION_OPTIONS_FLAGS_ADD_SEGMENT (1<<1)
+
+#define VNET_CONNECT_REDIRECTED 123
+
+int vnet_bind_uri (vnet_bind_args_t *);
+int vnet_unbind_uri (char *uri, u32 api_client_index);
+int vnet_connect_uri (vnet_connect_args_t * a);
+int
+vnet_disconnect_session (u32 client_index, u32 session_index,
+ u32 thread_index);
+
+int vnet_bind (vnet_bind_args_t * a);
+int vnet_connect (vnet_connect_args_t * a);
+int vnet_unbind (vnet_unbind_args_t * a);
+int vnet_disconnect (vnet_disconnect_args_t * a);
+
+int
+api_parse_session_handle (u64 handle, u32 * session_index,
+ u32 * thread_index);
+
+#endif /* __included_uri_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** Generate typed init functions for multiple hash table styles... */
+
+#include <vppinfra/bihash_16_8.h>
+#include <vppinfra/bihash_template.h>
+
+#include <vppinfra/bihash_template.c>
+
+#undef __included_bihash_template_h__
+
+#include <vppinfra/bihash_48_8.h>
+#include <vppinfra/bihash_template.h>
+
+#include <vppinfra/bihash_template.c>
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ip/ip.h>
+
+#include <vnet/tcp/tcp.h>
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+#include <vlibmemory/unix_shared_memory_queue.h>
+
+#include <vnet/udp/udp_packet.h>
+#include <vnet/lisp-cp/packets.h>
+#include <math.h>
+
+vlib_node_registration_t session_queue_node;
+
+typedef struct
+{
+ u32 session_index;
+ u32 server_thread_index;
+} session_queue_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_session_queue_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
+
+ s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
+ t->session_index, t->server_thread_index);
+ return s;
+}
+
+vlib_node_registration_t session_queue_node;
+
+#define foreach_session_queue_error \
+_(TX, "Packets transmitted") \
+_(TIMER, "Timer events")
+
+typedef enum
+{
+#define _(sym,str) SESSION_QUEUE_ERROR_##sym,
+ foreach_session_queue_error
+#undef _
+ SESSION_QUEUE_N_ERROR,
+} session_queue_error_t;
+
+static char *session_queue_error_strings[] = {
+#define _(sym,string) string,
+ foreach_session_queue_error
+#undef _
+};
+
+static u32 session_type_to_next[] = {
+ SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT,
+ SESSION_QUEUE_NEXT_IP4_LOOKUP,
+ SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT,
+ SESSION_QUEUE_NEXT_IP6_LOOKUP,
+};
+
+always_inline int
+session_fifo_rx_i (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_manager_main_t * smm, session_fifo_event_t * e0,
+ stream_session_t * s0, u32 thread_index, int *n_tx_packets,
+ u8 peek_data)
+{
+ u32 n_trace = vlib_get_trace_count (vm, node);
+ u32 left_to_snd0, max_len_to_snd0, len_to_deq0, n_bufs, snd_space0;
+ u32 n_frame_bytes, n_frames_per_evt;
+ transport_connection_t *tc0;
+ transport_proto_vft_t *transport_vft;
+ u32 next_index, next0, *to_next, n_left_to_next, bi0;
+ vlib_buffer_t *b0;
+ u32 rx_offset;
+ u16 snd_mss0;
+ u8 *data0;
+ int i;
+
+ next_index = next0 = session_type_to_next[s0->session_type];
+
+ transport_vft = session_get_transport_vft (s0->session_type);
+ tc0 = transport_vft->get_connection (s0->connection_index, thread_index);
+
+ /* Make sure we have space to send and there's something to dequeue */
+ snd_space0 = transport_vft->send_space (tc0);
+ snd_mss0 = transport_vft->send_mss (tc0);
+
+ if (snd_space0 == 0 || svm_fifo_max_dequeue (s0->server_tx_fifo) == 0
+ || snd_mss0 == 0)
+ return 0;
+
+ ASSERT (e0->enqueue_length > 0);
+
+ /* Ensure we're not writing more than transport window allows */
+ max_len_to_snd0 = clib_min (e0->enqueue_length, snd_space0);
+
+ if (peek_data)
+ {
+ /* Offset in rx fifo from where to peek data */
+ rx_offset = transport_vft->rx_fifo_offset (tc0);
+ }
+
+ /* TODO check if transport is willing to send len_to_snd0
+ * bytes (Nagle) */
+
+ n_frame_bytes = snd_mss0 * VLIB_FRAME_SIZE;
+ n_frames_per_evt = ceil ((double) max_len_to_snd0 / n_frame_bytes);
+
+ n_bufs = vec_len (smm->tx_buffers[thread_index]);
+ left_to_snd0 = max_len_to_snd0;
+ for (i = 0; i < n_frames_per_evt; i++)
+ {
+ /* Make sure we have at least one full frame of buffers ready */
+ if (PREDICT_FALSE (n_bufs < VLIB_FRAME_SIZE))
+ {
+ vec_validate (smm->tx_buffers[thread_index],
+ n_bufs + VLIB_FRAME_SIZE - 1);
+ n_bufs +=
+ vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][n_bufs],
+ VLIB_FRAME_SIZE);
+
+ /* buffer shortage
+ * XXX 0.9 because when debugging we might not get a full frame */
+ if (PREDICT_FALSE (n_bufs < 0.9 * VLIB_FRAME_SIZE))
+ {
+ /* Keep track of how much we've dequeued and exit */
+ e0->enqueue_length -= max_len_to_snd0 - left_to_snd0;
+ return -1;
+ }
+
+ _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
+ }
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ while (left_to_snd0 && n_left_to_next)
+ {
+ /* Get free buffer */
+ n_bufs--;
+ bi0 = smm->tx_buffers[thread_index][n_bufs];
+ _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b0->error = 0;
+ b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID
+ | VNET_BUFFER_LOCALLY_ORIGINATED;
+ b0->current_data = 0;
+
+ /* RX on the local interface. tx in default fib */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+
+ /* usual speculation, or the enqueue_x1 macro will barf */
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ session_queue_trace_t *t0;
+ vlib_trace_buffer (vm, node, next_index, b0,
+ 1 /* follow_chain */ );
+ vlib_set_trace_count (vm, node, --n_trace);
+ t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
+ t0->session_index = s0->session_index;
+ t0->server_thread_index = s0->thread_index;
+ }
+
+ if (1)
+ {
+ ELOG_TYPE_DECLARE (e) =
+ {
+ .format = "evt-dequeue: id %d length %d",.format_args =
+ "i4i4",};
+ struct
+ {
+ u32 data[2];
+ } *ed;
+ ed = ELOG_DATA (&vm->elog_main, e);
+ ed->data[0] = e0->event_id;
+ ed->data[1] = e0->enqueue_length;
+ }
+
+ len_to_deq0 = (left_to_snd0 < snd_mss0) ? left_to_snd0 : snd_mss0;
+
+ /* Make room for headers */
+ data0 = vlib_buffer_make_headroom (b0, MAX_HDRS_LEN);
+
+ /* Dequeue the data
+ * TODO 1) peek instead of dequeue
+ * 2) buffer chains */
+ if (peek_data)
+ {
+ int n_bytes_read;
+ n_bytes_read = svm_fifo_peek (s0->server_tx_fifo, s0->pid,
+ rx_offset, len_to_deq0, data0);
+ if (n_bytes_read < 0)
+ goto dequeue_fail;
+
+ /* Keep track of progress locally, transport is also supposed to
+ * increment it independently when pushing header */
+ rx_offset += n_bytes_read;
+ }
+ else
+ {
+ if (svm_fifo_dequeue_nowait (s0->server_tx_fifo, s0->pid,
+ len_to_deq0, data0) < 0)
+ goto dequeue_fail;
+ }
+
+ b0->current_length = len_to_deq0;
+
+ /* Ask transport to push header */
+ transport_vft->push_header (tc0, b0);
+
+ left_to_snd0 -= len_to_deq0;
+ *n_tx_packets = *n_tx_packets + 1;
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ /* If we couldn't dequeue all bytes store progress */
+ if (max_len_to_snd0 < e0->enqueue_length)
+ {
+ e0->enqueue_length -= max_len_to_snd0;
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ }
+ return 0;
+
+dequeue_fail:
+ /* Can't read from fifo. Store event rx progress, save as partially read,
+ * return buff to free list and return */
+ e0->enqueue_length -= max_len_to_snd0 - left_to_snd0;
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+
+ to_next -= 1;
+ n_left_to_next += 1;
+ _vec_len (smm->tx_buffers[thread_index]) += 1;
+
+ clib_warning ("dequeue fail");
+ return 0;
+}
+
+int
+session_fifo_rx_peek (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_manager_main_t * smm, session_fifo_event_t * e0,
+ stream_session_t * s0, u32 thread_index, int *n_tx_pkts)
+{
+ return session_fifo_rx_i (vm, node, smm, e0, s0, thread_index, n_tx_pkts,
+ 1);
+}
+
+int
+session_fifo_rx_dequeue (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_manager_main_t * smm,
+ session_fifo_event_t * e0, stream_session_t * s0,
+ u32 thread_index, int *n_tx_pkts)
+{
+ return session_fifo_rx_i (vm, node, smm, e0, s0, thread_index, n_tx_pkts,
+ 0);
+}
+
+static uword
+session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ session_fifo_event_t *my_fifo_events, *e;
+ u32 n_to_dequeue;
+ unix_shared_memory_queue_t *q;
+ int n_tx_packets = 0;
+ u32 my_thread_index = vm->cpu_index;
+ int i, rv;
+
+ /*
+ * Update TCP time
+ */
+ tcp_update_time (vlib_time_now (vm), my_thread_index);
+
+ /*
+ * Get vpp queue events
+ */
+ q = smm->vpp_event_queues[my_thread_index];
+ if (PREDICT_FALSE (q == 0))
+ return 0;
+
+ /* min number of events we can dequeue without blocking */
+ n_to_dequeue = q->cursize;
+ if (n_to_dequeue == 0)
+ return 0;
+
+ my_fifo_events = smm->fifo_events[my_thread_index];
+
+ /* If we didn't manage to process previous events try going
+ * over them again without dequeuing new ones.
+ * XXX: Block senders to sessions that can't keep up */
+ if (vec_len (my_fifo_events) >= 100)
+ goto skip_dequeue;
+
+ /* See you in the next life, don't be late */
+ if (pthread_mutex_trylock (&q->mutex))
+ return 0;
+
+ for (i = 0; i < n_to_dequeue; i++)
+ {
+ vec_add2 (my_fifo_events, e, 1);
+ unix_shared_memory_queue_sub_raw (q, (u8 *) e);
+ }
+
+ /* The other side of the connection is not polling */
+ if (q->cursize < (q->maxsize / 8))
+ (void) pthread_cond_broadcast (&q->condvar);
+ pthread_mutex_unlock (&q->mutex);
+
+ smm->fifo_events[my_thread_index] = my_fifo_events;
+
+skip_dequeue:
+
+ for (i = 0; i < n_to_dequeue; i++)
+ {
+ svm_fifo_t *f0; /* $$$ prefetch 1 ahead maybe */
+ stream_session_t *s0;
+ u32 server_session_index0, server_thread_index0;
+ session_fifo_event_t *e0;
+
+ e0 = &my_fifo_events[i];
+ f0 = e0->fifo;
+ server_session_index0 = f0->server_session_index;
+ server_thread_index0 = f0->server_thread_index;
+
+ /* $$$ add multiple event queues, per vpp worker thread */
+ ASSERT (server_thread_index0 == my_thread_index);
+
+ s0 = pool_elt_at_index (smm->sessions[my_thread_index],
+ server_session_index0);
+
+ ASSERT (s0->thread_index == my_thread_index);
+
+ switch (e0->event_type)
+ {
+ case FIFO_EVENT_SERVER_TX:
+ /* Spray packets in per session type frames, since they go to
+ * different nodes */
+ rv = (smm->session_rx_fns[s0->session_type]) (vm, node, smm, e0, s0,
+ my_thread_index,
+ &n_tx_packets);
+ if (rv < 0)
+ goto done;
+
+ break;
+
+ default:
+ clib_warning ("unhandled event type %d", e0->event_type);
+ }
+ }
+
+done:
+
+ /* Couldn't process all events. Probably out of buffers */
+ if (PREDICT_FALSE (i < n_to_dequeue))
+ {
+ session_fifo_event_t *partially_read =
+ smm->evts_partially_read[my_thread_index];
+ vec_add (partially_read, &my_fifo_events[i], n_to_dequeue - i);
+ vec_free (my_fifo_events);
+ smm->fifo_events[my_thread_index] = partially_read;
+ smm->evts_partially_read[my_thread_index] = 0;
+ }
+ else
+ {
+ vec_free (smm->fifo_events[my_thread_index]);
+ smm->fifo_events[my_thread_index] =
+ smm->evts_partially_read[my_thread_index];
+ smm->evts_partially_read[my_thread_index] = 0;
+ }
+
+ vlib_node_increment_counter (vm, session_queue_node.index,
+ SESSION_QUEUE_ERROR_TX, n_tx_packets);
+
+ return n_tx_packets;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (session_queue_node) =
+{
+ .function = session_queue_node_fn,
+ .name = "session-queue",
+ .format_trace = format_session_queue_trace,
+ .type = VLIB_NODE_TYPE_INPUT,
+ .n_errors = ARRAY_LEN (session_queue_error_strings),
+ .error_strings = session_queue_error_strings,
+ .n_next_nodes = SESSION_QUEUE_N_NEXT,
+ /* .state = VLIB_NODE_STATE_DISABLED, enable on-demand? */
+ /* edit / add dispositions here */
+ .next_nodes =
+ {
+ [SESSION_QUEUE_NEXT_DROP] = "error-drop",
+ [SESSION_QUEUE_NEXT_IP4_LOOKUP] = "ip4-lookup",
+ [SESSION_QUEUE_NEXT_IP6_LOOKUP] = "ip6-lookup",
+ [SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT] = "tcp4-output",
+ [SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT] = "tcp6-output",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2015-2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ /** \brief Bind to a given URI
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param accept_cookie - sender accept cookie, to identify this bind flavor
+ @param uri - a URI, e.g. "tcp://0.0.0.0/0/80" [ipv4]
+ "tcp://::/0/80" [ipv6] etc.
+ @param options - socket options, fifo sizes, etc.
+*/
+define bind_uri {
+ u32 client_index;
+ u32 context;
+ u32 accept_cookie;
+ u32 initial_segment_size;
+ u8 uri[128];
+ u64 options[16];
+};
+
+/** \brief Unbind a given URI
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param uri - a URI, e.g. "tcp://0.0.0.0/0/80" [ipv4]
+ "tcp://::/0/80" [ipv6], etc.
+ @param options - socket options, fifo sizes, etc.
+*/
+define unbind_uri {
+ u32 client_index;
+ u32 context;
+ u8 uri[128];
+};
+
+/** \brief Connect to a given URI
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param accept_cookie - sender accept cookie, to identify this bind flavor
+ @param uri - a URI, e.g. "tcp4://0.0.0.0/0/80"
+ "tcp6://::/0/80" [ipv6], etc.
+ @param options - socket options, fifo sizes, etc.
+*/
+define connect_uri {
+ u32 client_index;
+ u32 context;
+ u8 uri[128];
+ u64 client_queue_address;
+ u64 options[16];
+};
+
+/** \brief Bind reply
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+ @param event_queue_address - vpp event queue address or 0 if this
+ connection shouldn't send events
+ @param segment_name_length - length of segment name
+ @param segment_name - name of segment client needs to attach to
+*/
+define bind_uri_reply {
+ u32 context;
+ i32 retval;
+ u64 server_event_queue_address;
+ u8 segment_name_length;
+ u32 segment_size;
+ u8 segment_name[128];
+};
+
+/** \brief unbind reply
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+*/
+define unbind_uri_reply {
+ u32 context;
+ i32 retval;
+};
+
+/** \brief vpp->client, connect reply
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+ @param server_rx_fifo - rx (vpp -> vpp-client) fifo address
+ @param server_tx_fifo - tx (vpp-client -> vpp) fifo address
+ @param session_index - session index;
+ @param session_thread_index - session thread index
+ @param session_type - session thread type
+ @param vpp_event_queue_address - vpp's event queue address
+ @param client_event_queue_address - client's event queue address
+ @param segment_name_length - non-zero if the client needs to attach to
+ the fifo segment
+ @param segment_name - set if the client needs to attach to the segment
+*/
+define connect_uri_reply {
+ u32 context;
+ i32 retval;
+ u64 server_rx_fifo;
+ u64 server_tx_fifo;
+ u32 session_index;
+ u32 session_thread_index;
+ u8 session_type;
+ u64 client_event_queue_address;
+ u64 vpp_event_queue_address;
+ u32 segment_size;
+ u8 segment_name_length;
+ u8 segment_name[128];
+};
+
+/** \brief vpp->client, please map an additional shared memory segment
+ @param context - sender context, to match reply w/ request
+ @param segment_name -
+*/
+define map_another_segment {
+ u32 client_index;
+ u32 context;
+ u32 segment_size;
+ u8 segment_name[128];
+};
+
+/** \brief client->vpp
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+*/
+define map_another_segment_reply {
+ u32 context;
+ i32 retval;
+};
+
+/** \brief vpp->client, accept this session
+ @param context - sender context, to match reply w/ request
+ @param accept_cookie - tells client which bind flavor just occurred
+ @param rx_fifo_address - rx (vpp -> vpp-client) fifo address
+ @param tx_fifo_address - tx (vpp-client -> vpp) fifo address
+ @param session_index - index of new session
+ @param session_thread_index - thread index of new session
+ @param vpp_event_queue_address - vpp's event queue address
+ @param session_type - type of session
+
+*/
+define accept_session {
+ u32 client_index;
+ u32 context;
+ u32 accept_cookie;
+ u64 server_rx_fifo;
+ u64 server_tx_fifo;
+ u32 session_index;
+ u32 session_thread_index;
+ u64 vpp_event_queue_address;
+ u8 session_type;
+};
+
+/** \brief client->vpp, reply to an accept message
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+ @param session_index - session index from accept_session / connect_reply
+ @param session_thread_index - thread index from accept_session /
+ connect_reply
+*/
+define accept_session_reply {
+ u32 context;
+ i32 retval;
+ u8 session_type;
+ u8 session_thread_index;
+ u32 session_index;
+};
+
+/** \brief bidirectional disconnect API
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param context - sender context, to match reply w/ request
+ @param session_index - cookie #1 from accept_session / connect_reply
+ @param session_thread_index - cookie #2
+*/
+define disconnect_session {
+ u32 client_index;
+ u32 context;
+ u32 session_index;
+ u32 session_thread_index;
+};
+
+/** \brief bidirectional disconnect reply API
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+ @param session_index - session index from accept_session / connect_reply
+ @param session_thread_index - thread index from accept_session /
+ connect_reply
+*/
+define disconnect_session_reply {
+ u32 client_index;
+ u32 context;
+ i32 retval;
+ u32 session_index;
+ u32 session_thread_index;
+};
+
+/** \brief vpp->client reset session API
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param context - sender context, to match reply w/ request
+ @param session_index - session index from accept_session / connect_reply
+ @param session_thread_index - thread index from accept_session /
+ connect_reply
+*/
+define reset_session {
+ u32 client_index;
+ u32 context;
+ u32 session_index;
+ u32 session_thread_index;
+};
+
+/** \brief client->vpp reset session reply
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+ @param session_index - session index from accept_session / connect_reply
+ @param session_thread_index - thread index from accept_session /
+ connect_reply
+*/
+define reset_session_reply {
+ u32 client_index;
+ u32 context;
+ i32 retval;
+ u32 session_index;
+ u32 session_thread_index;
+};
+
+/** \brief Bind to an ip:port pair for a given transport protocol
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param vrf - bind namespace
+ @param is_ip4 - flag that is 1 if ip address family is IPv4
+ @param ip - ip address
+ @param port - port
+ @param proto - protocol 0 - TCP 1 - UDP
+ @param options - socket options, fifo sizes, etc.
+*/
+define bind_sock {
+ u32 client_index;
+ u32 context;
+ u32 vrf;
+ u8 is_ip4;
+ u8 ip[16];
+ u16 port;
+ u8 proto;
+ u64 options[16];
+};
+
+/** \brief Unbind
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param handle - bind handle obtained from bind reply
+*/
+define unbind_sock {
+ u32 client_index;
+ u32 context;
+ u64 handle;
+};
+
+/** \brief Connect to a remote peer
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param vrf - connection namespace
+ @param is_ip4 - flag that is 1 if ip address family is IPv4
+ @param ip - ip address
+ @param port - port
+ @param proto - protocol 0 - TCP 1 - UDP
+ @param client_queue_address - client's API queue address. Non-zero when
+ used to perform redirects
+ @param options - socket options, fifo sizes, etc.
+*/
+define connect_sock {
+ u32 client_index;
+ u32 context;
+ u32 vrf;
+ u8 is_ip4;
+ u8 ip[16];
+ u16 port;
+ u8 proto;
+ u64 client_queue_address;
+ u64 options[16];
+};
+
+/** \brief Bind reply
+ @param context - sender context, to match reply w/ request
+ @param handle - bind handle
+ @param retval - return code for the request
+ @param event_queue_address - vpp event queue address or 0 if this
+ connection shouldn't send events
+ @param segment_name_length - length of segment name
+ @param segment_name - name of segment client needs to attach to
+*/
+define bind_sock_reply {
+ u32 context;
+ u64 handle;
+ i32 retval;
+ u64 server_event_queue_address;
+ u32 segment_size;
+ u8 segment_name_length;
+ u8 segment_name[128];
+};
+
+/** \brief unbind reply
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+*/
+define unbind_sock_reply {
+ u32 context;
+ i32 retval;
+};
+
+/** \brief vpp/server->client, connect reply
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+ @param handle - connection handle
+ @param server_rx_fifo - rx (vpp -> vpp-client) fifo address
+ @param server_tx_fifo - tx (vpp-client -> vpp) fifo address
+ @param vpp_event_queue_address - vpp's event queue address
+ @param client_event_queue_address - client's event queue address
+ @param segment_name_length - non-zero if the client needs to attach to
+ the fifo segment
+ @param segment_name - set if the client needs to attach to the segment
+*/
+define connect_sock_reply {
+ u32 context;
+ i32 retval;
+ u64 handle;
+ u64 server_rx_fifo;
+ u64 server_tx_fifo;
+ u64 client_event_queue_address;
+ u64 vpp_event_queue_address;
+ u32 segment_size;
+ u8 segment_name_length;
+ u8 segment_name[128];
+};
+
+/** \brief bidirectional disconnect API
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param context - sender context, to match reply w/ request
+ @param handle - session handle obtained through accept/connect
+*/
+define disconnect_sock {
+ u32 client_index;
+ u32 context;
+ u64 handle;
+};
+
+/** \brief bidirectional disconnect reply API
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param client_context - sender context, to match reply w/ request
+ @param handle - session handle obtained through accept/connect
+*/
+define disconnect_sock_reply {
+ u32 client_index;
+ u32 context;
+ i32 retval;
+ u64 handle;
+};
+
+/** \brief vpp->client, accept this session
+ @param context - sender context, to match reply w/ request
+ @param accept_cookie - tells client which bind flavor just occurred
+ @param handle - session handle obtained through accept/connect
+ @param rx_fifo_address - rx (vpp -> vpp-client) fifo address
+ @param tx_fifo_address - tx (vpp-client -> vpp) fifo address
+ @param vpp_event_queue_address - vpp's event queue address
+*/
+define accept_sock {
+ u32 client_index;
+ u32 context;
+ u32 accept_cookie;
+ u64 handle;
+ u64 server_rx_fifo;
+ u64 server_tx_fifo;
+ u64 vpp_event_queue_address;
+};
+
+/** \brief client->vpp, reply to an accept message
+ @param context - sender context, to match reply w/ request
+ @param retval - return code for the request
+ @param handle - session handle obtained through accept/connect
+*/
+define accept_sock_reply {
+ u32 context;
+ i32 retval;
+ u64 handle;
+};
+
+/** \brief vpp->client reset session API
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param context - sender context, to match reply w/ request
+ @param handle - session handle obtained through accept/connect
+*/
+define reset_sock {
+ u32 client_index;
+ u32 context;
+ u64 handle;
+};
+
+/** \brief client->vpp reset session reply
+ @param client_index - opaque cookie to identify the sender
+ client to vpp direction only
+ @param context - sender context, to match reply w/ request
+ @param handle - session handle obtained through accept/connect
+*/
+define reset_sock_reply {
+ u32 client_index;
+ u32 context;
+ i32 retval;
+ u64 handle;
+};
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
\ No newline at end of file
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief Session and session manager
+ */
+
+#include <vnet/session/session.h>
+#include <vlibmemory/api.h>
+#include <vnet/dpo/load_balance.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vnet/session/application.h>
+
+/**
+ * Per-type vector of transport protocol virtual function tables
+ */
+static transport_proto_vft_t *tp_vfts;
+
+session_manager_main_t session_manager_main;
+
+/*
+ * Session lookup key; (src-ip, dst-ip, src-port, dst-port, session-type)
+ * Value: (owner thread index << 32 | session_index);
+ */
+static void
+stream_session_table_add_for_tc (u8 sst, transport_connection_t * tc,
+ u64 value)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ session_kv4_t kv4;
+ session_kv6_t kv6;
+
+ switch (sst)
+ {
+ case SESSION_TYPE_IP4_UDP:
+ case SESSION_TYPE_IP4_TCP:
+ make_v4_ss_kv_from_tc (&kv4, tc);
+ kv4.value = value;
+ clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4, 1 /* is_add */ );
+ break;
+ case SESSION_TYPE_IP6_UDP:
+ case SESSION_TYPE_IP6_TCP:
+ make_v6_ss_kv_from_tc (&kv6, tc);
+ kv6.value = value;
+ clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6, 1 /* is_add */ );
+ break;
+ default:
+ clib_warning ("Session type not supported");
+ ASSERT (0);
+ }
+}
+
+void
+stream_session_table_add (session_manager_main_t * smm, stream_session_t * s,
+ u64 value)
+{
+ transport_connection_t *tc;
+
+ tc = tp_vfts[s->session_type].get_connection (s->connection_index,
+ s->thread_index);
+ stream_session_table_add_for_tc (s->session_type, tc, value);
+}
+
+static void
+stream_session_half_open_table_add (u8 sst, transport_connection_t * tc,
+ u64 value)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ session_kv4_t kv4;
+ session_kv6_t kv6;
+
+ switch (sst)
+ {
+ case SESSION_TYPE_IP4_UDP:
+ case SESSION_TYPE_IP4_TCP:
+ make_v4_ss_kv_from_tc (&kv4, tc);
+ kv4.value = value;
+ clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4,
+ 1 /* is_add */ );
+ break;
+ case SESSION_TYPE_IP6_UDP:
+ case SESSION_TYPE_IP6_TCP:
+ make_v6_ss_kv_from_tc (&kv6, tc);
+ kv6.value = value;
+ clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6,
+ 1 /* is_add */ );
+ break;
+ default:
+ clib_warning ("Session type not supported");
+ ASSERT (0);
+ }
+}
+
+static int
+stream_session_table_del_for_tc (session_manager_main_t * smm, u8 sst,
+ transport_connection_t * tc)
+{
+ session_kv4_t kv4;
+ session_kv6_t kv6;
+
+ switch (sst)
+ {
+ case SESSION_TYPE_IP4_UDP:
+ case SESSION_TYPE_IP4_TCP:
+ make_v4_ss_kv_from_tc (&kv4, tc);
+ return clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4,
+ 0 /* is_add */ );
+ break;
+ case SESSION_TYPE_IP6_UDP:
+ case SESSION_TYPE_IP6_TCP:
+ make_v6_ss_kv_from_tc (&kv6, tc);
+ return clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6,
+ 0 /* is_add */ );
+ break;
+ default:
+ clib_warning ("Session type not supported");
+ ASSERT (0);
+ }
+
+ return 0;
+}
+
+static int
+stream_session_table_del (session_manager_main_t * smm, stream_session_t * s)
+{
+ transport_connection_t *ts;
+
+ ts = tp_vfts[s->session_type].get_connection (s->connection_index,
+ s->thread_index);
+ return stream_session_table_del_for_tc (smm, s->session_type, ts);
+}
+
+static void
+stream_session_half_open_table_del (session_manager_main_t * smm, u8 sst,
+ transport_connection_t * tc)
+{
+ session_kv4_t kv4;
+ session_kv6_t kv6;
+
+ switch (sst)
+ {
+ case SESSION_TYPE_IP4_UDP:
+ case SESSION_TYPE_IP4_TCP:
+ make_v4_ss_kv_from_tc (&kv4, tc);
+ clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4,
+ 0 /* is_add */ );
+ break;
+ case SESSION_TYPE_IP6_UDP:
+ case SESSION_TYPE_IP6_TCP:
+ make_v6_ss_kv_from_tc (&kv6, tc);
+ clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6,
+ 0 /* is_add */ );
+ break;
+ default:
+ clib_warning ("Session type not supported");
+ ASSERT (0);
+ }
+}
+
+stream_session_t *
+stream_session_lookup_listener4 (ip4_address_t * lcl, u16 lcl_port, u8 proto)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ session_kv4_t kv4;
+ int rv;
+
+ make_v4_listener_kv (&kv4, lcl, lcl_port, proto);
+ rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
+ if (rv == 0)
+ return pool_elt_at_index (smm->listen_sessions[proto], (u32) kv4.value);
+
+ /* Zero out the lcl ip */
+ kv4.key[0] = 0;
+ rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
+ if (rv == 0)
+ return pool_elt_at_index (smm->listen_sessions[proto], kv4.value);
+
+ return 0;
+}
+
+/** Looks up a session based on the 5-tuple passed as argument.
+ *
+ * First it tries to find an established session, if this fails, it tries
+ * finding a listener session if this fails, it tries a lookup with a
+ * wildcarded local source (listener bound to all interfaces)
+ */
+stream_session_t *
+stream_session_lookup4 (ip4_address_t * lcl, ip4_address_t * rmt,
+ u16 lcl_port, u16 rmt_port, u8 proto,
+ u32 my_thread_index)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ session_kv4_t kv4;
+ int rv;
+
+ /* Lookup session amongst established ones */
+ make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto);
+ rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
+ if (rv == 0)
+ return stream_session_get_tsi (kv4.value, my_thread_index);
+
+ /* If nothing is found, check if any listener is available */
+ return stream_session_lookup_listener4 (lcl, lcl_port, proto);
+}
+
+stream_session_t *
+stream_session_lookup_listener6 (ip6_address_t * lcl, u16 lcl_port, u8 proto)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ session_kv6_t kv6;
+ int rv;
+
+ make_v6_listener_kv (&kv6, lcl, lcl_port, proto);
+ rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
+ if (rv == 0)
+ return pool_elt_at_index (smm->listen_sessions[proto], kv6.value);
+
+ /* Zero out the lcl ip */
+ kv6.key[0] = kv6.key[1] = 0;
+ rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
+ if (rv == 0)
+ return pool_elt_at_index (smm->listen_sessions[proto], kv6.value);
+
+ return 0;
+}
+
+/* Looks up a session based on the 5-tuple passed as argument.
+ * First it tries to find an established session, if this fails, it tries
+ * finding a listener session if this fails, it tries a lookup with a
+ * wildcarded local source (listener bound to all interfaces) */
+stream_session_t *
+stream_session_lookup6 (ip6_address_t * lcl, ip6_address_t * rmt,
+ u16 lcl_port, u16 rmt_port, u8 proto,
+ u32 my_thread_index)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ session_kv6_t kv6;
+ int rv;
+
+ make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto);
+ rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
+ if (rv == 0)
+ return stream_session_get_tsi (kv6.value, my_thread_index);
+
+ /* If nothing is found, check if any listener is available */
+ return stream_session_lookup_listener6 (lcl, lcl_port, proto);
+}
+
+stream_session_t *
+stream_session_lookup_listener (ip46_address_t * lcl, u16 lcl_port, u8 proto)
+{
+ switch (proto)
+ {
+ case SESSION_TYPE_IP4_UDP:
+ case SESSION_TYPE_IP4_TCP:
+ return stream_session_lookup_listener4 (&lcl->ip4, lcl_port, proto);
+ break;
+ case SESSION_TYPE_IP6_UDP:
+ case SESSION_TYPE_IP6_TCP:
+ return stream_session_lookup_listener6 (&lcl->ip6, lcl_port, proto);
+ break;
+ }
+ return 0;
+}
+
+static u64
+stream_session_half_open_lookup (session_manager_main_t * smm,
+ ip46_address_t * lcl, ip46_address_t * rmt,
+ u16 lcl_port, u16 rmt_port, u8 proto)
+{
+ session_kv4_t kv4;
+ session_kv6_t kv6;
+ int rv;
+
+ switch (proto)
+ {
+ case SESSION_TYPE_IP4_UDP:
+ case SESSION_TYPE_IP4_TCP:
+ make_v4_ss_kv (&kv4, &lcl->ip4, &rmt->ip4, lcl_port, rmt_port, proto);
+ rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4);
+
+ if (rv == 0)
+ return kv4.value;
+
+ return (u64) ~ 0;
+ break;
+ case SESSION_TYPE_IP6_UDP:
+ case SESSION_TYPE_IP6_TCP:
+ make_v6_ss_kv (&kv6, &lcl->ip6, &rmt->ip6, lcl_port, rmt_port, proto);
+ rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6);
+
+ if (rv == 0)
+ return kv6.value;
+
+ return (u64) ~ 0;
+ break;
+ }
+ return 0;
+}
+
+transport_connection_t *
+stream_session_lookup_transport4 (session_manager_main_t * smm,
+ ip4_address_t * lcl, ip4_address_t * rmt,
+ u16 lcl_port, u16 rmt_port, u8 proto,
+ u32 my_thread_index)
+{
+ session_kv4_t kv4;
+ stream_session_t *s;
+ int rv;
+
+ /* Lookup session amongst established ones */
+ make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto);
+ rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4);
+ if (rv == 0)
+ {
+ s = stream_session_get_tsi (kv4.value, my_thread_index);
+
+ return tp_vfts[s->session_type].get_connection (s->connection_index,
+ my_thread_index);
+ }
+
+ /* If nothing is found, check if any listener is available */
+ s = stream_session_lookup_listener4 (lcl, lcl_port, proto);
+ if (s)
+ return tp_vfts[s->session_type].get_listener (s->connection_index);
+
+ /* Finally, try half-open connections */
+ rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4);
+ if (rv == 0)
+ return tp_vfts[proto].get_half_open (kv4.value & 0xFFFFFFFF);
+
+ return 0;
+}
+
+transport_connection_t *
+stream_session_lookup_transport6 (session_manager_main_t * smm,
+ ip6_address_t * lcl, ip6_address_t * rmt,
+ u16 lcl_port, u16 rmt_port, u8 proto,
+ u32 my_thread_index)
+{
+ stream_session_t *s;
+ session_kv6_t kv6;
+ int rv;
+
+ make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto);
+ rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6);
+ if (rv == 0)
+ {
+ s = stream_session_get_tsi (kv6.value, my_thread_index);
+
+ return tp_vfts[s->session_type].get_connection (s->connection_index,
+ my_thread_index);
+ }
+
+ /* If nothing is found, check if any listener is available */
+ s = stream_session_lookup_listener6 (lcl, lcl_port, proto);
+ if (s)
+ return tp_vfts[s->session_type].get_listener (s->connection_index);
+
+ /* Finally, try half-open connections */
+ rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6);
+ if (rv == 0)
+ return tp_vfts[s->session_type].get_half_open (kv6.value & 0xFFFFFFFF);
+
+ return 0;
+}
+
+/**
+ * Allocate vpp event queue (once) per worker thread
+ */
+void
+vpp_session_event_queue_allocate (session_manager_main_t * smm,
+ u32 thread_index)
+{
+ api_main_t *am = &api_main;
+ void *oldheap;
+
+ if (smm->vpp_event_queues[thread_index] == 0)
+ {
+ /* Allocate event fifo in the /vpe-api shared-memory segment */
+ oldheap = svm_push_data_heap (am->vlib_rp);
+
+ smm->vpp_event_queues[thread_index] =
+ unix_shared_memory_queue_init (2048 /* nels $$$$ config */ ,
+ sizeof (session_fifo_event_t),
+ 0 /* consumer pid */ ,
+ 0
+ /* (do not) send signal when queue non-empty */
+ );
+
+ svm_pop_heap (oldheap);
+ }
+}
+
+void
+session_manager_get_segment_info (u32 index, u8 ** name, u32 * size)
+{
+ svm_fifo_segment_private_t *s;
+ s = svm_fifo_get_segment (index);
+ *name = s->h->segment_name;
+ *size = s->ssvm.ssvm_size;
+}
+
+always_inline int
+session_manager_add_segment_i (session_manager_main_t * smm,
+ session_manager_t * sm,
+ u32 segment_size, u8 * segment_name)
+{
+ svm_fifo_segment_create_args_t _ca, *ca = &_ca;
+ int rv;
+
+ memset (ca, 0, sizeof (*ca));
+
+ ca->segment_name = (char *) segment_name;
+ ca->segment_size = segment_size;
+
+ rv = svm_fifo_segment_create (ca);
+ if (rv)
+ {
+ clib_warning ("svm_fifo_segment_create ('%s', %d) failed",
+ ca->segment_name, ca->segment_size);
+ vec_free (segment_name);
+ return -1;
+ }
+
+ vec_add1 (sm->segment_indices, ca->new_segment_index);
+
+ return 0;
+}
+
+static int
+session_manager_add_segment (session_manager_main_t * smm,
+ session_manager_t * sm)
+{
+ u8 *segment_name;
+ svm_fifo_segment_create_args_t _ca, *ca = &_ca;
+ u32 add_segment_size;
+ u32 default_segment_size = 128 << 10;
+
+ memset (ca, 0, sizeof (*ca));
+ segment_name = format (0, "%d-%d%c", getpid (),
+ smm->unique_segment_name_counter++, 0);
+ add_segment_size =
+ sm->add_segment_size ? sm->add_segment_size : default_segment_size;
+
+ return session_manager_add_segment_i (smm, sm, add_segment_size,
+ segment_name);
+}
+
+int
+session_manager_add_first_segment (session_manager_main_t * smm,
+ session_manager_t * sm, u32 segment_size,
+ u8 ** segment_name)
+{
+ svm_fifo_segment_create_args_t _ca, *ca = &_ca;
+ memset (ca, 0, sizeof (*ca));
+ *segment_name = format (0, "%d-%d%c", getpid (),
+ smm->unique_segment_name_counter++, 0);
+ return session_manager_add_segment_i (smm, sm, segment_size, *segment_name);
+}
+
+void
+session_manager_del (session_manager_main_t * smm, session_manager_t * sm)
+{
+ u32 *deleted_sessions = 0;
+ u32 *deleted_thread_indices = 0;
+ int i, j;
+
+ /* Across all fifo segments used by the server */
+ for (j = 0; j < vec_len (sm->segment_indices); j++)
+ {
+ svm_fifo_segment_private_t *fifo_segment;
+ svm_fifo_t **fifos;
+ /* Vector of fifos allocated in the segment */
+ fifo_segment = svm_fifo_get_segment (sm->segment_indices[j]);
+ fifos = (svm_fifo_t **) fifo_segment->h->fifos;
+
+ /*
+ * Remove any residual sessions from the session lookup table
+ * Don't bother deleting the individual fifos, we're going to
+ * throw away the fifo segment in a minute.
+ */
+ for (i = 0; i < vec_len (fifos); i++)
+ {
+ svm_fifo_t *fifo;
+ u32 session_index, thread_index;
+ stream_session_t *session;
+
+ fifo = fifos[i];
+ session_index = fifo->server_session_index;
+ thread_index = fifo->server_thread_index;
+
+ session = pool_elt_at_index (smm->sessions[thread_index],
+ session_index);
+
+ /* Add to the deleted_sessions vector (once!) */
+ if (!session->is_deleted)
+ {
+ session->is_deleted = 1;
+ vec_add1 (deleted_sessions,
+ session - smm->sessions[thread_index]);
+ vec_add1 (deleted_thread_indices, thread_index);
+ }
+ }
+
+ for (i = 0; i < vec_len (deleted_sessions); i++)
+ {
+ stream_session_t *session;
+
+ session =
+ pool_elt_at_index (smm->sessions[deleted_thread_indices[i]],
+ deleted_sessions[i]);
+
+ /* Instead of directly removing the session call disconnect */
+ stream_session_disconnect (session);
+
+ /*
+ stream_session_table_del (smm, session);
+ pool_put(smm->sessions[deleted_thread_indices[i]], session);
+ */
+ }
+
+ vec_reset_length (deleted_sessions);
+ vec_reset_length (deleted_thread_indices);
+
+ /* Instead of removing the segment, test when removing the session if
+ * the segment can be removed
+ */
+ /* svm_fifo_segment_delete (fifo_segment); */
+ }
+
+ vec_free (deleted_sessions);
+ vec_free (deleted_thread_indices);
+}
+
+int
+session_manager_allocate_session_fifos (session_manager_main_t * smm,
+ session_manager_t * sm,
+ svm_fifo_t ** server_rx_fifo,
+ svm_fifo_t ** server_tx_fifo,
+ u32 * fifo_segment_index,
+ u8 * added_a_segment)
+{
+ svm_fifo_segment_private_t *fifo_segment;
+ u32 fifo_size, default_fifo_size = 8192 /* TODO config */ ;
+ int i;
+
+ *added_a_segment = 0;
+
+ /* Allocate svm fifos */
+ ASSERT (vec_len (sm->segment_indices));
+
+again:
+ for (i = 0; i < vec_len (sm->segment_indices); i++)
+ {
+ *fifo_segment_index = sm->segment_indices[i];
+ fifo_segment = svm_fifo_get_segment (*fifo_segment_index);
+
+ fifo_size = sm->rx_fifo_size;
+ fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size;
+ *server_rx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size);
+
+ fifo_size = sm->tx_fifo_size;
+ fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size;
+ *server_tx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size);
+
+ if (*server_rx_fifo == 0)
+ {
+ /* This would be very odd, but handle it... */
+ if (*server_tx_fifo != 0)
+ {
+ svm_fifo_segment_free_fifo (fifo_segment, *server_tx_fifo);
+ *server_tx_fifo = 0;
+ }
+ continue;
+ }
+ if (*server_tx_fifo == 0)
+ {
+ if (*server_rx_fifo != 0)
+ {
+ svm_fifo_segment_free_fifo (fifo_segment, *server_rx_fifo);
+ *server_rx_fifo = 0;
+ }
+ continue;
+ }
+ break;
+ }
+
+ /* See if we're supposed to create another segment */
+ if (*server_rx_fifo == 0)
+ {
+ if (sm->add_segment)
+ {
+ if (*added_a_segment)
+ {
+ clib_warning ("added a segment, still cant allocate a fifo");
+ return SESSION_ERROR_NEW_SEG_NO_SPACE;
+ }
+
+ if (session_manager_add_segment (smm, sm))
+ return VNET_API_ERROR_URI_FIFO_CREATE_FAILED;
+
+ *added_a_segment = 1;
+ goto again;
+ }
+ else
+ return SESSION_ERROR_NO_SPACE;
+ }
+ return 0;
+}
+
+int
+stream_session_create_i (session_manager_main_t * smm, application_t * app,
+ transport_connection_t * tc,
+ stream_session_t ** ret_s)
+{
+ int rv;
+ svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0;
+ u32 fifo_segment_index;
+ u32 pool_index, seg_size;
+ stream_session_t *s;
+ u64 value;
+ u32 thread_index = tc->thread_index;
+ session_manager_t *sm;
+ u8 segment_added;
+ u8 *seg_name;
+
+ sm = session_manager_get (app->session_manager_index);
+
+ /* Check the API queue */
+ if (app->mode == APP_SERVER && application_api_queue_is_full (app))
+ return SESSION_ERROR_API_QUEUE_FULL;
+
+ if ((rv = session_manager_allocate_session_fifos (smm, sm, &server_rx_fifo,
+ &server_tx_fifo,
+ &fifo_segment_index,
+ &segment_added)))
+ return rv;
+
+ if (segment_added && app->mode == APP_SERVER)
+ {
+ /* Send an API message to the external server, to map new segment */
+ ASSERT (app->cb_fns.add_segment_callback);
+
+ session_manager_get_segment_info (fifo_segment_index, &seg_name,
+ &seg_size);
+ if (app->cb_fns.add_segment_callback (app->api_client_index, seg_name,
+ seg_size))
+ return VNET_API_ERROR_URI_FIFO_CREATE_FAILED;
+ }
+
+ /* Create the session */
+ pool_get (smm->sessions[thread_index], s);
+ memset (s, 0, sizeof (*s));
+
+ /* Initialize backpointers */
+ pool_index = s - smm->sessions[thread_index];
+ server_rx_fifo->server_session_index = pool_index;
+ server_rx_fifo->server_thread_index = thread_index;
+
+ server_tx_fifo->server_session_index = pool_index;
+ server_tx_fifo->server_thread_index = thread_index;
+
+ s->server_rx_fifo = server_rx_fifo;
+ s->server_tx_fifo = server_tx_fifo;
+
+ /* Initialize state machine, such as it is... */
+ s->session_type = app->session_type;
+ s->session_state = SESSION_STATE_CONNECTING;
+ s->app_index = application_get_index (app);
+ s->server_segment_index = fifo_segment_index;
+ s->thread_index = thread_index;
+ s->session_index = pool_index;
+
+ /* Attach transport to session */
+ s->connection_index = tc->c_index;
+
+ /* Attach session to transport */
+ tc->s_index = s->session_index;
+
+ /* Add to the main lookup table */
+ value = (((u64) thread_index) << 32) | (u64) s->session_index;
+ stream_session_table_add_for_tc (app->session_type, tc, value);
+
+ *ret_s = s;
+
+ return 0;
+}
+
+/*
+ * Enqueue data for delivery to session peer. Does not notify peer of enqueue
+ * event but on request can queue notification events for later delivery by
+ * calling stream_server_flush_enqueue_events().
+ *
+ * @param tc Transport connection which is to be enqueued data
+ * @param data Data to be enqueued
+ * @param len Length of data to be enqueued
+ * @param queue_event Flag to indicate if peer is to be notified or if event
+ * is to be queued. The former is useful when more data is
+ * enqueued and only one event is to be generated.
+ * @return Number of bytes enqueued or a negative value if enqueueing failed.
+ */
+int
+stream_session_enqueue_data (transport_connection_t * tc, u8 * data, u16 len,
+ u8 queue_event)
+{
+ stream_session_t *s;
+ int enqueued;
+
+ s = stream_session_get (tc->s_index, tc->thread_index);
+
+ /* Make sure there's enough space left. We might've filled the pipes */
+ if (PREDICT_FALSE (len > svm_fifo_max_enqueue (s->server_rx_fifo)))
+ return -1;
+
+ enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, s->pid, len, data);
+
+ if (queue_event)
+ {
+ /* Queue RX event on this fifo. Eventually these will need to be flushed
+ * by calling stream_server_flush_enqueue_events () */
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ u32 thread_index = s->thread_index;
+ u32 my_enqueue_epoch = smm->current_enqueue_epoch[thread_index];
+
+ if (s->enqueue_epoch != my_enqueue_epoch)
+ {
+ s->enqueue_epoch = my_enqueue_epoch;
+ vec_add1 (smm->session_indices_to_enqueue_by_thread[thread_index],
+ s - smm->sessions[thread_index]);
+ }
+ }
+
+ return enqueued;
+}
+
+/** Check if we have space in rx fifo to push more bytes */
+u8
+stream_session_no_space (transport_connection_t * tc, u32 thread_index,
+ u16 data_len)
+{
+ stream_session_t *s = stream_session_get (tc->c_index, thread_index);
+
+ if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY))
+ return 1;
+
+ if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo))
+ return 1;
+
+ return 0;
+}
+
+u32
+stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer,
+ u32 offset, u32 max_bytes)
+{
+ stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_peek (s->server_tx_fifo, s->pid, offset, max_bytes, buffer);
+}
+
+u32
+stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
+{
+ stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_dequeue_drop (s->server_tx_fifo, s->pid, max_bytes);
+}
+
+/**
+ * Notify session peer that new data has been enqueued.
+ *
+ * @param s Stream session for which the event is to be generated.
+ * @param block Flag to indicate if call should block if event queue is full.
+ *
+ * @return 0 on succes or negative number if failed to send notification.
+ */
+static int
+stream_session_enqueue_notify (stream_session_t * s, u8 block)
+{
+ application_t *app;
+ session_fifo_event_t evt;
+ unix_shared_memory_queue_t *q;
+ static u32 serial_number;
+
+ if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
+ return 0;
+
+ /* Get session's server */
+ app = application_get (s->app_index);
+
+ /* Fabricate event */
+ evt.fifo = s->server_rx_fifo;
+ evt.event_type = FIFO_EVENT_SERVER_RX;
+ evt.event_id = serial_number++;
+ evt.enqueue_length = svm_fifo_max_dequeue (s->server_rx_fifo);
+
+ /* Add event to server's event queue */
+ q = app->event_queue;
+
+ /* Based on request block (or not) for lack of space */
+ if (block || PREDICT_TRUE (q->cursize < q->maxsize))
+ unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt,
+ 0 /* do wait for mutex */ );
+ else
+ return -1;
+
+ if (1)
+ {
+ ELOG_TYPE_DECLARE (e) =
+ {
+ .format = "evt-enqueue: id %d length %d",.format_args = "i4i4",};
+ struct
+ {
+ u32 data[2];
+ } *ed;
+ ed = ELOG_DATA (&vlib_global_main.elog_main, e);
+ ed->data[0] = evt.event_id;
+ ed->data[1] = evt.enqueue_length;
+ }
+
+ return 0;
+}
+
+/**
+ * Flushes queue of sessions that are to be notified of new data
+ * enqueued events.
+ *
+ * @param thread_index Thread index for which the flush is to be performed.
+ * @return 0 on success or a positive number indicating the number of
+ * failures due to API queue being full.
+ */
+int
+session_manager_flush_enqueue_events (u32 thread_index)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ u32 *session_indices_to_enqueue;
+ int i, errors = 0;
+
+ session_indices_to_enqueue =
+ smm->session_indices_to_enqueue_by_thread[thread_index];
+
+ for (i = 0; i < vec_len (session_indices_to_enqueue); i++)
+ {
+ stream_session_t *s0;
+
+ /* Get session */
+ s0 = stream_session_get (session_indices_to_enqueue[i], thread_index);
+ if (stream_session_enqueue_notify (s0, 0 /* don't block */ ))
+ {
+ errors++;
+ }
+ }
+
+ vec_reset_length (session_indices_to_enqueue);
+
+ smm->session_indices_to_enqueue_by_thread[thread_index] =
+ session_indices_to_enqueue;
+
+ /* Increment enqueue epoch for next round */
+ smm->current_enqueue_epoch[thread_index]++;
+
+ return errors;
+}
+
+/*
+ * Start listening on server's ip/port pair for requested transport.
+ *
+ * Creates a 'dummy' stream session with state LISTENING to be used in session
+ * lookups, prior to establishing connection. Requests transport to build
+ * it's own specific listening connection.
+ */
+int
+stream_session_start_listen (u32 server_index, ip46_address_t * ip, u16 port)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ stream_session_t *s;
+ transport_connection_t *tc;
+ application_t *srv;
+ u32 tci;
+
+ srv = application_get (server_index);
+
+ pool_get (smm->listen_sessions[srv->session_type], s);
+ memset (s, 0, sizeof (*s));
+
+ s->session_type = srv->session_type;
+ s->session_state = SESSION_STATE_LISTENING;
+ s->session_index = s - smm->listen_sessions[srv->session_type];
+ s->app_index = srv->index;
+
+ /* Transport bind/listen */
+ tci = tp_vfts[srv->session_type].bind (smm->vlib_main, s->session_index, ip,
+ port);
+
+ /* Attach transport to session */
+ s->connection_index = tci;
+ tc = tp_vfts[srv->session_type].get_listener (tci);
+
+ srv->session_index = s->session_index;
+
+ /* Add to the main lookup table */
+ stream_session_table_add_for_tc (s->session_type, tc, s->session_index);
+
+ return 0;
+}
+
+void
+stream_session_stop_listen (u32 server_index)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ stream_session_t *listener;
+ transport_connection_t *tc;
+ application_t *srv;
+
+ srv = application_get (server_index);
+ listener = pool_elt_at_index (smm->listen_sessions[srv->session_type],
+ srv->session_index);
+
+ tc = tp_vfts[srv->session_type].get_listener (listener->connection_index);
+ stream_session_table_del_for_tc (smm, listener->session_type, tc);
+
+ tp_vfts[srv->session_type].unbind (smm->vlib_main,
+ listener->connection_index);
+ pool_put (smm->listen_sessions[srv->session_type], listener);
+}
+
+int
+connect_server_add_segment_cb (application_t * ss, char *segment_name,
+ u32 segment_size)
+{
+ /* Does exactly nothing, but die */
+ ASSERT (0);
+ return 0;
+}
+
+void
+connects_session_manager_init (session_manager_main_t * smm, u8 session_type)
+{
+ session_manager_t *sm;
+ u32 connect_fifo_size = 8 << 10; /* Config? */
+ u32 default_segment_size = 1 << 20;
+
+ pool_get (smm->session_managers, sm);
+ memset (sm, 0, sizeof (*sm));
+
+ sm->add_segment_size = default_segment_size;
+ sm->rx_fifo_size = connect_fifo_size;
+ sm->tx_fifo_size = connect_fifo_size;
+ sm->add_segment = 1;
+
+ session_manager_add_segment (smm, sm);
+ smm->connect_manager_index[session_type] = sm - smm->session_managers;
+}
+
+void
+stream_session_connect_notify (transport_connection_t * tc, u8 sst,
+ u8 is_fail)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ application_t *app;
+ stream_session_t *new_s = 0;
+ u64 value;
+
+ value = stream_session_half_open_lookup (smm, &tc->lcl_ip, &tc->rmt_ip,
+ tc->lcl_port, tc->rmt_port,
+ tc->proto);
+ if (value == HALF_OPEN_LOOKUP_INVALID_VALUE)
+ {
+ clib_warning ("This can't be good!");
+ return;
+ }
+
+ app = application_get (value >> 32);
+
+ if (!is_fail)
+ {
+ /* Create new session (server segments are allocated if needed) */
+ if (stream_session_create_i (smm, app, tc, &new_s))
+ return;
+
+ app->session_index = stream_session_get_index (new_s);
+ app->thread_index = new_s->thread_index;
+
+ /* Allocate vpp event queue for this thread if needed */
+ vpp_session_event_queue_allocate (smm, tc->thread_index);
+ }
+
+ /* Notify client */
+ app->cb_fns.session_connected_callback (app->api_client_index, new_s,
+ is_fail);
+
+ /* Cleanup session lookup */
+ stream_session_half_open_table_del (smm, sst, tc);
+}
+
+void
+stream_session_accept_notify (transport_connection_t * tc)
+{
+ application_t *server;
+ stream_session_t *s;
+
+ s = stream_session_get (tc->s_index, tc->thread_index);
+ server = application_get (s->app_index);
+ server->cb_fns.session_accept_callback (s);
+}
+
+/**
+ * Notification from transport that connection is being closed.
+ *
+ * A disconnect is sent to application but state is not removed. Once
+ * disconnect is acknowledged by application, session disconnect is called.
+ * Ultimately this leads to close being called on transport (passive close).
+ */
+void
+stream_session_disconnect_notify (transport_connection_t * tc)
+{
+ application_t *server;
+ stream_session_t *s;
+
+ s = stream_session_get (tc->s_index, tc->thread_index);
+ server = application_get (s->app_index);
+ server->cb_fns.session_disconnect_callback (s);
+}
+
+/**
+ * Cleans up session and associated app if needed.
+ */
+void
+stream_session_delete (stream_session_t * s)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ svm_fifo_segment_private_t *fifo_segment;
+ application_t *app;
+ int rv;
+
+ /* delete from the main lookup table */
+ rv = stream_session_table_del (smm, s);
+
+ if (rv)
+ clib_warning ("hash delete error, rv %d", rv);
+
+ /* Cleanup fifo segments */
+ fifo_segment = svm_fifo_get_segment (s->server_segment_index);
+ svm_fifo_segment_free_fifo (fifo_segment, s->server_rx_fifo);
+ svm_fifo_segment_free_fifo (fifo_segment, s->server_tx_fifo);
+
+ /* Cleanup app if client */
+ app = application_get (s->app_index);
+ if (app->mode == APP_CLIENT)
+ {
+ application_del (app);
+ }
+ else if (app->mode == APP_SERVER)
+ {
+ session_manager_t *sm;
+ svm_fifo_segment_private_t *fifo_segment;
+ svm_fifo_t **fifos;
+ u32 fifo_index;
+
+ sm = session_manager_get (app->session_manager_index);
+
+ /* Delete fifo */
+ fifo_segment = svm_fifo_get_segment (s->server_segment_index);
+ fifos = (svm_fifo_t **) fifo_segment->h->fifos;
+
+ fifo_index = svm_fifo_segment_index (fifo_segment);
+
+ /* Remove segment only if it holds no fifos and not the first */
+ if (sm->segment_indices[0] != fifo_index && vec_len (fifos) == 0)
+ svm_fifo_segment_delete (fifo_segment);
+ }
+
+ pool_put (smm->sessions[s->thread_index], s);
+}
+
+/**
+ * Notification from transport that connection is being deleted
+ *
+ * This should be called only on previously fully established sessions. For
+ * instance failed connects should call stream_session_connect_notify and
+ * indicate that the connect has failed.
+ */
+void
+stream_session_delete_notify (transport_connection_t * tc)
+{
+ stream_session_t *s;
+
+ s = stream_session_get_if_valid (tc->s_index, tc->thread_index);
+ if (!s)
+ {
+ clib_warning ("Surprised!");
+ return;
+ }
+ stream_session_delete (s);
+}
+
+/**
+ * Notify application that connection has been reset.
+ */
+void
+stream_session_reset_notify (transport_connection_t * tc)
+{
+ stream_session_t *s;
+ application_t *app;
+ s = stream_session_get (tc->s_index, tc->thread_index);
+
+ app = application_get (s->app_index);
+ app->cb_fns.session_reset_callback (s);
+}
+
+/**
+ * Accept a stream session. Optionally ping the server by callback.
+ */
+int
+stream_session_accept (transport_connection_t * tc, u32 listener_index,
+ u8 sst, u8 notify)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ application_t *server;
+ stream_session_t *s, *listener;
+
+ int rv;
+
+ /* Find the server */
+ listener = pool_elt_at_index (smm->listen_sessions[sst], listener_index);
+ server = application_get (listener->app_index);
+
+ if ((rv = stream_session_create_i (smm, server, tc, &s)))
+ return rv;
+
+ /* Allocate vpp event queue for this thread if needed */
+ vpp_session_event_queue_allocate (smm, tc->thread_index);
+
+ /* Shoulder-tap the server */
+ if (notify)
+ {
+ server->cb_fns.session_accept_callback (s);
+ }
+
+ return 0;
+}
+
+void
+stream_session_open (u8 sst, ip46_address_t * addr, u16 port_host_byte_order,
+ u32 app_index)
+{
+ transport_connection_t *tc;
+ u32 tci;
+ u64 value;
+
+ /* Ask transport to open connection */
+ tci = tp_vfts[sst].open (addr, port_host_byte_order);
+
+ /* Get transport connection */
+ tc = tp_vfts[sst].get_half_open (tci);
+
+ /* Store api_client_index and transport connection index */
+ value = (((u64) app_index) << 32) | (u64) tc->c_index;
+
+ /* Add to the half-open lookup table */
+ stream_session_half_open_table_add (sst, tc, value);
+}
+
+/**
+ * Disconnect session and propagate to transport. This should eventually
+ * result in a delete notification that allows us to cleanup session state.
+ * Called for both active/passive disconnects.
+ */
+void
+stream_session_disconnect (stream_session_t * s)
+{
+ tp_vfts[s->session_type].close (s->connection_index, s->thread_index);
+ s->session_state = SESSION_STATE_CLOSED;
+}
+
+/**
+ * Cleanup transport and session state.
+ */
+void
+stream_session_cleanup (stream_session_t * s)
+{
+ tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
+ stream_session_delete (s);
+}
+
+void
+session_register_transport (u8 type, const transport_proto_vft_t * vft)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+
+ vec_validate (tp_vfts, type);
+ tp_vfts[type] = *vft;
+
+ /* If an offset function is provided, then peek instead of dequeue */
+ smm->session_rx_fns[type] =
+ (vft->rx_fifo_offset) ? session_fifo_rx_peek : session_fifo_rx_dequeue;
+}
+
+transport_proto_vft_t *
+session_get_transport_vft (u8 type)
+{
+ if (type >= vec_len (tp_vfts))
+ return 0;
+ return &tp_vfts[type];
+}
+
+static clib_error_t *
+session_manager_main_init (vlib_main_t * vm)
+{
+ u32 num_threads;
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ session_manager_main_t *smm = &session_manager_main;
+ int i;
+
+ smm->vlib_main = vm;
+ smm->vnet_main = vnet_get_main ();
+
+ num_threads = 1 /* main thread */ + vtm->n_threads;
+
+ if (num_threads < 1)
+ return clib_error_return (0, "n_thread_stacks not set");
+
+ /* $$$ config parameters */
+ svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ ,
+ 20 /* timeout in seconds */ );
+
+ /* configure per-thread ** vectors */
+ vec_validate (smm->sessions, num_threads - 1);
+ vec_validate (smm->session_indices_to_enqueue_by_thread, num_threads - 1);
+ vec_validate (smm->tx_buffers, num_threads - 1);
+ vec_validate (smm->fifo_events, num_threads - 1);
+ vec_validate (smm->evts_partially_read, num_threads - 1);
+ vec_validate (smm->current_enqueue_epoch, num_threads - 1);
+ vec_validate (smm->vpp_event_queues, num_threads - 1);
+
+ /* $$$$ preallocate hack config parameter */
+ for (i = 0; i < 200000; i++)
+ {
+ stream_session_t *ss;
+ pool_get (smm->sessions[0], ss);
+ memset (ss, 0, sizeof (*ss));
+ }
+
+ for (i = 0; i < 200000; i++)
+ pool_put_index (smm->sessions[0], i);
+
+ clib_bihash_init_16_8 (&smm->v4_session_hash, "v4 session table",
+ 200000 /* $$$$ config parameter nbuckets */ ,
+ (64 << 20) /*$$$ config parameter table size */ );
+ clib_bihash_init_48_8 (&smm->v6_session_hash, "v6 session table",
+ 200000 /* $$$$ config parameter nbuckets */ ,
+ (64 << 20) /*$$$ config parameter table size */ );
+
+ clib_bihash_init_16_8 (&smm->v4_half_open_hash, "v4 half-open table",
+ 200000 /* $$$$ config parameter nbuckets */ ,
+ (64 << 20) /*$$$ config parameter table size */ );
+ clib_bihash_init_48_8 (&smm->v6_half_open_hash, "v6 half-open table",
+ 200000 /* $$$$ config parameter nbuckets */ ,
+ (64 << 20) /*$$$ config parameter table size */ );
+
+ for (i = 0; i < SESSION_N_TYPES; i++)
+ smm->connect_manager_index[i] = INVALID_INDEX;
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (session_manager_main_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_session_h__
+#define __included_session_h__
+
+#include <vnet/session/transport.h>
+#include <vlibmemory/unix_shared_memory_queue.h>
+#include <vlibmemory/api.h>
+#include <vppinfra/sparse_vec.h>
+#include <svm/svm_fifo_segment.h>
+
+#define HALF_OPEN_LOOKUP_INVALID_VALUE ((u64)~0)
+#define INVALID_INDEX ((u32)~0)
+
+/* TODO decide how much since we have pre-data as well */
+#define MAX_HDRS_LEN 100 /* Max number of bytes for headers */
+
+typedef enum
+{
+ FIFO_EVENT_SERVER_RX,
+ FIFO_EVENT_SERVER_TX,
+ FIFO_EVENT_TIMEOUT,
+ FIFO_EVENT_SERVER_EXIT,
+} fifo_event_type_t;
+
+#define foreach_session_input_error \
+_(NO_SESSION, "No session drops") \
+_(NO_LISTENER, "No listener for dst port drops") \
+_(ENQUEUED, "Packets pushed into rx fifo") \
+_(NOT_READY, "Session not ready packets") \
+_(FIFO_FULL, "Packets dropped for lack of rx fifo space") \
+_(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \
+_(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \
+_(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair") \
+_(NO_SPACE, "Couldn't allocate a fifo pair")
+
+typedef enum
+{
+#define _(sym,str) SESSION_ERROR_##sym,
+ foreach_session_input_error
+#undef _
+ SESSION_N_ERROR,
+} session_error_t;
+
+/* Event queue input node static next indices */
+typedef enum
+{
+ SESSION_QUEUE_NEXT_DROP,
+ SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT,
+ SESSION_QUEUE_NEXT_IP4_LOOKUP,
+ SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT,
+ SESSION_QUEUE_NEXT_IP6_LOOKUP,
+ SESSION_QUEUE_N_NEXT,
+} session_queue_next_t;
+
+#define foreach_session_type \
+ _(IP4_TCP, ip4_tcp) \
+ _(IP4_UDP, ip4_udp) \
+ _(IP6_TCP, ip6_tcp) \
+ _(IP6_UDP, ip6_udp)
+
+typedef enum
+{
+#define _(A, a) SESSION_TYPE_##A,
+ foreach_session_type
+#undef _
+ SESSION_N_TYPES,
+} session_type_t;
+
+/*
+ * Application session state
+ */
+typedef enum
+{
+ SESSION_STATE_LISTENING,
+ SESSION_STATE_CONNECTING,
+ SESSION_STATE_READY,
+ SESSION_STATE_CLOSED,
+ SESSION_STATE_N_STATES,
+} stream_session_state_t;
+
+typedef CLIB_PACKED (struct
+ {
+ svm_fifo_t * fifo;
+ u8 event_type;
+ /* $$$$ for event logging */
+ u16 event_id;
+ u32 enqueue_length;
+ }) session_fifo_event_t;
+
+typedef struct _stream_session_t
+{
+ /** Type */
+ u8 session_type;
+
+ /** State */
+ u8 session_state;
+
+ /** Session index in per_thread pool */
+ u32 session_index;
+
+ /** Transport specific */
+ u32 connection_index;
+
+ u8 thread_index;
+
+ /** Application specific */
+ u32 pid;
+
+ /** fifo pointers. Once allocated, these do not move */
+ svm_fifo_t *server_rx_fifo;
+ svm_fifo_t *server_tx_fifo;
+
+ /** To avoid n**2 "one event per frame" check */
+ u8 enqueue_epoch;
+
+ /** used during unbind processing */
+ u8 is_deleted;
+
+ /** stream server pool index */
+ u32 app_index;
+
+ /** svm segment index */
+ u32 server_segment_index;
+} stream_session_t;
+
+typedef struct _session_manager
+{
+ /** segments mapped by this server */
+ u32 *segment_indices;
+
+ /** Session fifo sizes. They are provided for binds and take default
+ * values for connects */
+ u32 rx_fifo_size;
+ u32 tx_fifo_size;
+
+ /** Configured additional segment size */
+ u32 add_segment_size;
+
+ /** Flag that indicates if additional segments should be created */
+ u8 add_segment;
+} session_manager_t;
+
+/* Forward definition */
+typedef struct _session_manager_main session_manager_main_t;
+
+typedef int
+ (session_fifo_rx_fn) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_manager_main_t * smm,
+ session_fifo_event_t * e0, stream_session_t * s0,
+ u32 thread_index, int *n_tx_pkts);
+
+extern session_fifo_rx_fn session_fifo_rx_peek;
+extern session_fifo_rx_fn session_fifo_rx_dequeue;
+
+struct _session_manager_main
+{
+ /** Lookup tables for established sessions and listeners */
+ clib_bihash_16_8_t v4_session_hash;
+ clib_bihash_48_8_t v6_session_hash;
+
+ /** Lookup tables for half-open sessions */
+ clib_bihash_16_8_t v4_half_open_hash;
+ clib_bihash_48_8_t v6_half_open_hash;
+
+ /** Per worker thread session pools */
+ stream_session_t **sessions;
+
+ /** Pool of listen sessions. Same type as stream sessions to ease lookups */
+ stream_session_t *listen_sessions[SESSION_N_TYPES];
+
+ /** Sparse vector to map dst port to stream server */
+ u16 *stream_server_by_dst_port[SESSION_N_TYPES];
+
+ /** per-worker enqueue epoch counters */
+ u8 *current_enqueue_epoch;
+
+ /** Per-worker thread vector of sessions to enqueue */
+ u32 **session_indices_to_enqueue_by_thread;
+
+ /** per-worker tx buffer free lists */
+ u32 **tx_buffers;
+
+ /** Per worker-thread vector of partially read events */
+ session_fifo_event_t **evts_partially_read;
+
+ /** per-worker active event vectors */
+ session_fifo_event_t **fifo_events;
+
+ /** vpp fifo event queue */
+ unix_shared_memory_queue_t **vpp_event_queues;
+
+ /** Unique segment name counter */
+ u32 unique_segment_name_counter;
+
+ /* Connection manager used by incoming connects */
+ u32 connect_manager_index[SESSION_N_TYPES];
+
+ session_manager_t *session_managers;
+
+ /** Per transport rx function that can either dequeue or peek */
+ session_fifo_rx_fn *session_rx_fns[SESSION_N_TYPES];
+
+ /* Convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+};
+
+extern session_manager_main_t session_manager_main;
+
+/*
+ * Session manager function
+ */
+always_inline session_manager_main_t *
+vnet_get_session_manager_main ()
+{
+ return &session_manager_main;
+}
+
+always_inline session_manager_t *
+session_manager_get (u32 index)
+{
+ return pool_elt_at_index (session_manager_main.session_managers, index);
+}
+
+always_inline unix_shared_memory_queue_t *
+session_manager_get_vpp_event_queue (u32 thread_index)
+{
+ return session_manager_main.vpp_event_queues[thread_index];
+}
+
+always_inline session_manager_t *
+connects_session_manager_get (session_manager_main_t * smm,
+ session_type_t session_type)
+{
+ return pool_elt_at_index (smm->session_managers,
+ smm->connect_manager_index[session_type]);
+}
+
+void session_manager_get_segment_info (u32 index, u8 ** name, u32 * size);
+int session_manager_flush_enqueue_events (u32 thread_index);
+int
+session_manager_add_first_segment (session_manager_main_t * smm,
+ session_manager_t * sm, u32 segment_size,
+ u8 ** segment_name);
+void
+session_manager_del (session_manager_main_t * smm, session_manager_t * sm);
+void
+connects_session_manager_init (session_manager_main_t * smm, u8 session_type);
+
+/*
+ * Stream session functions
+ */
+
+stream_session_t *stream_session_lookup_listener4 (ip4_address_t * lcl,
+ u16 lcl_port, u8 proto);
+stream_session_t *stream_session_lookup4 (ip4_address_t * lcl,
+ ip4_address_t * rmt, u16 lcl_port,
+ u16 rmt_port, u8 proto,
+ u32 thread_index);
+stream_session_t *stream_session_lookup_listener6 (ip6_address_t * lcl,
+ u16 lcl_port, u8 proto);
+stream_session_t *stream_session_lookup6 (ip6_address_t * lcl,
+ ip6_address_t * rmt, u16 lcl_port,
+ u16 rmt_port, u8, u32 thread_index);
+transport_connection_t
+ * stream_session_lookup_transport4 (session_manager_main_t * smm,
+ ip4_address_t * lcl,
+ ip4_address_t * rmt, u16 lcl_port,
+ u16 rmt_port, u8 proto,
+ u32 thread_index);
+transport_connection_t
+ * stream_session_lookup_transport6 (session_manager_main_t * smm,
+ ip6_address_t * lcl,
+ ip6_address_t * rmt, u16 lcl_port,
+ u16 rmt_port, u8 proto,
+ u32 thread_index);
+stream_session_t *stream_session_lookup_listener (ip46_address_t * lcl,
+ u16 lcl_port, u8 proto);
+
+always_inline stream_session_t *
+stream_session_get_tsi (u64 ti_and_si, u32 thread_index)
+{
+ ASSERT ((u32) (ti_and_si >> 32) == thread_index);
+ return pool_elt_at_index (session_manager_main.sessions[thread_index],
+ ti_and_si & 0xFFFFFFFFULL);
+}
+
+always_inline stream_session_t *
+stream_session_get (u64 si, u32 thread_index)
+{
+ return pool_elt_at_index (session_manager_main.sessions[thread_index], si);
+}
+
+always_inline stream_session_t *
+stream_session_get_if_valid (u64 si, u32 thread_index)
+{
+ if (thread_index >= vec_len (session_manager_main.sessions))
+ return 0;
+
+ if (pool_is_free_index (session_manager_main.sessions[thread_index], si))
+ return 0;
+
+ return pool_elt_at_index (session_manager_main.sessions[thread_index], si);
+}
+
+always_inline stream_session_t *
+stream_session_listener_get (u8 sst, u64 si)
+{
+ return pool_elt_at_index (session_manager_main.listen_sessions[sst], si);
+}
+
+always_inline u32
+stream_session_get_index (stream_session_t * s)
+{
+ if (s->session_state == SESSION_STATE_LISTENING)
+ return s - session_manager_main.listen_sessions[s->session_type];
+
+ return s - session_manager_main.sessions[s->thread_index];
+}
+
+always_inline u32
+stream_session_max_enqueue (transport_connection_t * tc)
+{
+ stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
+ return svm_fifo_max_enqueue (s->server_rx_fifo);
+}
+
+int
+stream_session_enqueue_data (transport_connection_t * tc, u8 * data, u16 len,
+ u8 queue_event);
+u32
+stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer,
+ u32 offset, u32 max_bytes);
+u32 stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
+
+void
+stream_session_connect_notify (transport_connection_t * tc, u8 sst,
+ u8 is_fail);
+void stream_session_accept_notify (transport_connection_t * tc);
+void stream_session_disconnect_notify (transport_connection_t * tc);
+void stream_session_delete_notify (transport_connection_t * tc);
+void stream_session_reset_notify (transport_connection_t * tc);
+int
+stream_session_accept (transport_connection_t * tc, u32 listener_index,
+ u8 sst, u8 notify);
+void stream_session_open (u8 sst, ip46_address_t * addr,
+ u16 port_host_byte_order, u32 api_client_index);
+void stream_session_disconnect (stream_session_t * s);
+void stream_session_cleanup (stream_session_t * s);
+int
+stream_session_start_listen (u32 server_index, ip46_address_t * ip, u16 port);
+void stream_session_stop_listen (u32 server_index);
+
+u8 *format_stream_session (u8 * s, va_list * args);
+
+void session_register_transport (u8 type, const transport_proto_vft_t * vft);
+transport_proto_vft_t *session_get_transport_vft (u8 type);
+
+#endif /* __included_session_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2015-2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+#include <vnet/session/application.h>
+
+#include <vnet/vnet_msg_enum.h>
+#include "application_interface.h"
+
+#define vl_typedefs /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_session_api_msg \
+_(MAP_ANOTHER_SEGMENT_REPLY, map_another_segment_reply) \
+_(BIND_URI, bind_uri) \
+_(UNBIND_URI, unbind_uri) \
+_(CONNECT_URI, connect_uri) \
+_(DISCONNECT_SESSION, disconnect_session) \
+_(DISCONNECT_SESSION_REPLY, disconnect_session_reply) \
+_(ACCEPT_SESSION_REPLY, accept_session_reply) \
+_(RESET_SESSION_REPLY, reset_session_reply) \
+_(BIND_SOCK, bind_sock) \
+_(UNBIND_SOCK, unbind_sock) \
+_(CONNECT_SOCK, connect_sock) \
+_(DISCONNECT_SOCK, disconnect_sock) \
+_(DISCONNECT_SOCK_REPLY, disconnect_sock_reply) \
+_(ACCEPT_SOCK_REPLY, accept_sock_reply) \
+_(RESET_SOCK_REPLY, reset_sock_reply) \
+
+static int
+send_add_segment_callback (u32 api_client_index, const u8 * segment_name,
+ u32 segment_size)
+{
+ vl_api_map_another_segment_t *mp;
+ unix_shared_memory_queue_t *q;
+
+ q = vl_api_client_index_to_input_queue (api_client_index);
+
+ if (!q)
+ return -1;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_MAP_ANOTHER_SEGMENT);
+ mp->segment_size = segment_size;
+ strncpy ((char *) mp->segment_name, (char *) segment_name,
+ sizeof (mp->segment_name) - 1);
+
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+
+ return 0;
+}
+
+static int
+send_session_accept_uri_callback (stream_session_t * s)
+{
+ vl_api_accept_session_t *mp;
+ unix_shared_memory_queue_t *q, *vpp_queue;
+ application_t *server = application_get (s->app_index);
+
+ q = vl_api_client_index_to_input_queue (server->api_client_index);
+ vpp_queue = session_manager_get_vpp_event_queue (s->thread_index);
+
+ if (!q)
+ return -1;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_ACCEPT_SESSION);
+
+ /* Note: session_type is the first octet in all types of sessions */
+
+ mp->accept_cookie = server->accept_cookie;
+ mp->server_rx_fifo = (u64) s->server_rx_fifo;
+ mp->server_tx_fifo = (u64) s->server_tx_fifo;
+ mp->session_thread_index = s->thread_index;
+ mp->session_index = s->session_index;
+ mp->session_type = s->session_type;
+ mp->vpp_event_queue_address = (u64) vpp_queue;
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+
+ return 0;
+}
+
+static void
+send_session_disconnect_uri_callback (stream_session_t * s)
+{
+ vl_api_disconnect_session_t *mp;
+ unix_shared_memory_queue_t *q;
+ application_t *app = application_get (s->app_index);
+
+ q = vl_api_client_index_to_input_queue (app->api_client_index);
+
+ if (!q)
+ return;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_DISCONNECT_SESSION);
+
+ mp->session_thread_index = s->thread_index;
+ mp->session_index = s->session_index;
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+static int
+send_session_connected_uri_callback (u32 api_client_index,
+ stream_session_t * s, u8 is_fail)
+{
+ vl_api_connect_uri_reply_t *mp;
+ unix_shared_memory_queue_t *q;
+ application_t *app = application_lookup (api_client_index);
+ u8 *seg_name;
+ unix_shared_memory_queue_t *vpp_queue;
+
+ q = vl_api_client_index_to_input_queue (app->api_client_index);
+
+ if (!q)
+ return -1;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_CONNECT_URI_REPLY);
+ mp->context = app->api_context;
+ mp->retval = is_fail;
+ if (!is_fail)
+ {
+ vpp_queue = session_manager_get_vpp_event_queue (s->thread_index);
+ mp->server_rx_fifo = (u64) s->server_rx_fifo;
+ mp->server_tx_fifo = (u64) s->server_tx_fifo;
+ mp->session_thread_index = s->thread_index;
+ mp->session_index = s->session_index;
+ mp->session_type = s->session_type;
+ mp->vpp_event_queue_address = (u64) vpp_queue;
+ mp->client_event_queue_address = (u64) app->event_queue;
+
+ session_manager_get_segment_info (s->server_segment_index, &seg_name,
+ &mp->segment_size);
+ mp->segment_name_length = vec_len (seg_name);
+ if (mp->segment_name_length)
+ clib_memcpy (mp->segment_name, seg_name, mp->segment_name_length);
+ }
+
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+
+ /* Remove client if connect failed */
+ if (is_fail)
+ application_del (app);
+
+ return 0;
+}
+
+/**
+ * Redirect a connect_uri message to the indicated server.
+ * Only sent if the server has bound the related port with
+ * URI_OPTIONS_FLAGS_USE_FIFO
+ */
+static int
+redirect_connect_uri_callback (u32 server_api_client_index, void *mp_arg)
+{
+ vl_api_connect_uri_t *mp = mp_arg;
+ unix_shared_memory_queue_t *server_q, *client_q;
+ vlib_main_t *vm = vlib_get_main ();
+ f64 timeout = vlib_time_now (vm) + 0.5;
+ int rv = 0;
+
+ server_q = vl_api_client_index_to_input_queue (server_api_client_index);
+
+ if (!server_q)
+ {
+ rv = VNET_API_ERROR_INVALID_VALUE;
+ goto out;
+ }
+
+ client_q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (!client_q)
+ {
+ rv = VNET_API_ERROR_INVALID_VALUE_2;
+ goto out;
+ }
+
+ /* Tell the server the client's API queue address, so it can reply */
+ mp->client_queue_address = (u64) client_q;
+
+ /*
+ * Bounce message handlers MUST NOT block the data-plane.
+ * Spin waiting for the queue lock, but
+ */
+
+ while (vlib_time_now (vm) < timeout)
+ {
+ rv =
+ unix_shared_memory_queue_add (server_q, (u8 *) & mp, 1 /*nowait */ );
+ switch (rv)
+ {
+ /* correctly enqueued */
+ case 0:
+ return VNET_CONNECT_REDIRECTED;
+
+ /* continue spinning, wait for pthread_mutex_trylock to work */
+ case -1:
+ continue;
+
+ /* queue stuffed, drop the msg */
+ case -2:
+ rv = VNET_API_ERROR_QUEUE_FULL;
+ goto out;
+ }
+ }
+out:
+ /* Dispose of the message */
+ vl_msg_api_free (mp);
+ return rv;
+}
+
+static u64
+make_session_handle (stream_session_t * s)
+{
+ return (u64) s->session_index << 32 | (u64) s->thread_index;
+}
+
+static int
+send_session_accept_callback (stream_session_t * s)
+{
+ vl_api_accept_sock_t *mp;
+ unix_shared_memory_queue_t *q, *vpp_queue;
+ application_t *server = application_get (s->app_index);
+
+ q = vl_api_client_index_to_input_queue (server->api_client_index);
+ vpp_queue = session_manager_get_vpp_event_queue (s->thread_index);
+
+ if (!q)
+ return -1;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_ACCEPT_SOCK);
+
+ /* Note: session_type is the first octet in all types of sessions */
+
+ mp->accept_cookie = server->accept_cookie;
+ mp->server_rx_fifo = (u64) s->server_rx_fifo;
+ mp->server_tx_fifo = (u64) s->server_tx_fifo;
+ mp->handle = make_session_handle (s);
+ mp->vpp_event_queue_address = (u64) vpp_queue;
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+
+ return 0;
+}
+
+static int
+send_session_connected_callback (u32 api_client_index, stream_session_t * s,
+ u8 is_fail)
+{
+ vl_api_connect_sock_reply_t *mp;
+ unix_shared_memory_queue_t *q;
+ application_t *app = application_lookup (api_client_index);
+ u8 *seg_name;
+ unix_shared_memory_queue_t *vpp_queue;
+
+ q = vl_api_client_index_to_input_queue (app->api_client_index);
+
+ if (!q)
+ return -1;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_CONNECT_SOCK_REPLY);
+ mp->context = app->api_context;
+ mp->retval = is_fail;
+ if (!is_fail)
+ {
+ vpp_queue = session_manager_get_vpp_event_queue (s->thread_index);
+ mp->server_rx_fifo = (u64) s->server_rx_fifo;
+ mp->server_tx_fifo = (u64) s->server_tx_fifo;
+ mp->handle = make_session_handle (s);
+ mp->vpp_event_queue_address = (u64) vpp_queue;
+ mp->client_event_queue_address = (u64) app->event_queue;
+
+ session_manager_get_segment_info (s->server_segment_index, &seg_name,
+ &mp->segment_size);
+ mp->segment_name_length = vec_len (seg_name);
+ if (mp->segment_name_length)
+ clib_memcpy (mp->segment_name, seg_name, mp->segment_name_length);
+ }
+
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+
+ /* Remove client if connect failed */
+ if (is_fail)
+ application_del (app);
+
+ return 0;
+}
+
+static void
+send_session_disconnect_callback (stream_session_t * s)
+{
+ vl_api_disconnect_sock_t *mp;
+ unix_shared_memory_queue_t *q;
+ application_t *app = application_get (s->app_index);
+
+ q = vl_api_client_index_to_input_queue (app->api_client_index);
+
+ if (!q)
+ return;
+
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ memset (mp, 0, sizeof (*mp));
+ mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_DISCONNECT_SOCK);
+
+ mp->handle = make_session_handle (s);
+ vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+/**
+ * Redirect a connect_uri message to the indicated server.
+ * Only sent if the server has bound the related port with
+ * URI_OPTIONS_FLAGS_USE_FIFO
+ */
+static int
+redirect_connect_callback (u32 server_api_client_index, void *mp_arg)
+{
+ vl_api_connect_sock_t *mp = mp_arg;
+ unix_shared_memory_queue_t *server_q, *client_q;
+ vlib_main_t *vm = vlib_get_main ();
+ f64 timeout = vlib_time_now (vm) + 0.5;
+ int rv = 0;
+
+ server_q = vl_api_client_index_to_input_queue (server_api_client_index);
+
+ if (!server_q)
+ {
+ rv = VNET_API_ERROR_INVALID_VALUE;
+ goto out;
+ }
+
+ client_q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (!client_q)
+ {
+ rv = VNET_API_ERROR_INVALID_VALUE_2;
+ goto out;
+ }
+
+ /* Tell the server the client's API queue address, so it can reply */
+ mp->client_queue_address = (u64) client_q;
+
+ /*
+ * Bounce message handlers MUST NOT block the data-plane.
+ * Spin waiting for the queue lock, but
+ */
+
+ while (vlib_time_now (vm) < timeout)
+ {
+ rv =
+ unix_shared_memory_queue_add (server_q, (u8 *) & mp, 1 /*nowait */ );
+ switch (rv)
+ {
+ /* correctly enqueued */
+ case 0:
+ return VNET_CONNECT_REDIRECTED;
+
+ /* continue spinning, wait for pthread_mutex_trylock to work */
+ case -1:
+ continue;
+
+ /* queue stuffed, drop the msg */
+ case -2:
+ rv = VNET_API_ERROR_QUEUE_FULL;
+ goto out;
+ }
+ }
+out:
+ /* Dispose of the message */
+ vl_msg_api_free (mp);
+ return rv;
+}
+
+static session_cb_vft_t uri_session_cb_vft = {
+ .session_accept_callback = send_session_accept_uri_callback,
+ .session_disconnect_callback = send_session_disconnect_uri_callback,
+ .session_connected_callback = send_session_connected_uri_callback,
+ .add_segment_callback = send_add_segment_callback,
+ .redirect_connect_callback = redirect_connect_uri_callback
+};
+
+static session_cb_vft_t session_cb_vft = {
+ .session_accept_callback = send_session_accept_callback,
+ .session_disconnect_callback = send_session_disconnect_callback,
+ .session_connected_callback = send_session_connected_callback,
+ .add_segment_callback = send_add_segment_callback,
+ .redirect_connect_callback = redirect_connect_callback
+};
+
+static int
+api_session_not_valid (u32 session_index, u32 thread_index)
+{
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ stream_session_t *pool;
+
+ if (thread_index >= vec_len (smm->sessions))
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ pool = smm->sessions[thread_index];
+
+ if (pool_is_free_index (pool, session_index))
+ return VNET_API_ERROR_INVALID_VALUE_2;
+
+ return 0;
+}
+
+static void
+vl_api_bind_uri_t_handler (vl_api_bind_uri_t * mp)
+{
+ vl_api_bind_uri_reply_t *rmp;
+ vnet_bind_args_t _a, *a = &_a;
+ char segment_name[128];
+ u32 segment_name_length;
+ int rv;
+
+ _Static_assert (sizeof (u64) * SESSION_OPTIONS_N_OPTIONS <=
+ sizeof (mp->options),
+ "Out of options, fix api message definition");
+
+ segment_name_length = ARRAY_LEN (segment_name);
+
+ memset (a, 0, sizeof (*a));
+
+ a->uri = (char *) mp->uri;
+ a->api_client_index = mp->client_index;
+ a->options = mp->options;
+ a->segment_name = segment_name;
+ a->segment_name_length = segment_name_length;
+ a->session_cb_vft = &uri_session_cb_vft;
+
+ a->options[SESSION_OPTIONS_SEGMENT_SIZE] = mp->initial_segment_size;
+ a->options[SESSION_OPTIONS_ACCEPT_COOKIE] = mp->accept_cookie;
+ rv = vnet_bind_uri (a);
+
+ /* *INDENT-OFF* */
+ REPLY_MACRO2 (VL_API_BIND_URI_REPLY, ({
+ rmp->retval = rv;
+ if (!rv)
+ {
+ rmp->segment_name_length = 0;
+ /* $$$$ policy? */
+ rmp->segment_size = mp->initial_segment_size;
+ if (segment_name_length)
+ {
+ memcpy (rmp->segment_name, segment_name, segment_name_length);
+ rmp->segment_name_length = segment_name_length;
+ }
+ rmp->server_event_queue_address = a->server_event_queue_address;
+ }
+ }));
+ /* *INDENT-ON* */
+
+}
+
+static void
+vl_api_unbind_uri_t_handler (vl_api_unbind_uri_t * mp)
+{
+ vl_api_unbind_uri_reply_t *rmp;
+ int rv;
+
+ rv = vnet_unbind_uri ((char *) mp->uri, mp->client_index);
+
+ REPLY_MACRO (VL_API_UNBIND_URI_REPLY);
+}
+
+static void
+vl_api_connect_uri_t_handler (vl_api_connect_uri_t * mp)
+{
+ vnet_connect_args_t _a, *a = &_a;
+
+ a->uri = (char *) mp->uri;
+ a->api_client_index = mp->client_index;
+ a->api_context = mp->context;
+ a->options = mp->options;
+ a->session_cb_vft = &uri_session_cb_vft;
+ a->mp = mp;
+ vnet_connect_uri (a);
+}
+
+static void
+vl_api_disconnect_session_t_handler (vl_api_disconnect_session_t * mp)
+{
+ vl_api_disconnect_session_reply_t *rmp;
+ int rv;
+
+ rv = api_session_not_valid (mp->session_index, mp->session_thread_index);
+ if (!rv)
+ rv = vnet_disconnect_session (mp->client_index, mp->session_index,
+ mp->session_thread_index);
+
+ REPLY_MACRO (VL_API_DISCONNECT_SESSION_REPLY);
+}
+
+static void
+vl_api_disconnect_session_reply_t_handler (vl_api_disconnect_session_reply_t *
+ mp)
+{
+ if (api_session_not_valid (mp->session_index, mp->session_thread_index))
+ {
+ clib_warning ("Invalid session!");
+ return;
+ }
+
+ /* Client objected to disconnecting the session, log and continue */
+ if (mp->retval)
+ {
+ clib_warning ("client retval %d", mp->retval);
+ return;
+ }
+
+ /* Disconnect has been confirmed. Confirm close to transport */
+ vnet_disconnect_session (mp->client_index, mp->session_index,
+ mp->session_thread_index);
+}
+
+static void
+vl_api_reset_session_reply_t_handler (vl_api_reset_session_reply_t * mp)
+{
+ stream_session_t *s;
+
+ if (api_session_not_valid (mp->session_index, mp->session_thread_index))
+ {
+ clib_warning ("Invalid session!");
+ return;
+ }
+
+ /* Client objected to resetting the session, log and continue */
+ if (mp->retval)
+ {
+ clib_warning ("client retval %d", mp->retval);
+ return;
+ }
+
+ s = stream_session_get (mp->session_index, mp->session_thread_index);
+
+ /* This comes as a response to a reset, transport only waiting for
+ * confirmation to remove connection state, no need to disconnect */
+ stream_session_cleanup (s);
+}
+
+static void
+vl_api_accept_session_reply_t_handler (vl_api_accept_session_reply_t * mp)
+{
+ stream_session_t *s;
+ int rv;
+
+ if (api_session_not_valid (mp->session_index, mp->session_thread_index))
+ return;
+
+ s = stream_session_get (mp->session_index, mp->session_thread_index);
+ rv = mp->retval;
+
+ if (rv)
+ {
+ /* Server isn't interested, kill the session */
+ stream_session_disconnect (s);
+ return;
+ }
+
+ s->session_state = SESSION_STATE_READY;
+}
+
+static void
+vl_api_map_another_segment_reply_t_handler (vl_api_map_another_segment_reply_t
+ * mp)
+{
+ clib_warning ("not implemented");
+}
+
+static void
+vl_api_bind_sock_t_handler (vl_api_bind_sock_t * mp)
+{
+ vl_api_bind_sock_reply_t *rmp;
+ vnet_bind_args_t _a, *a = &_a;
+ char segment_name[128];
+ u32 segment_name_length;
+ int rv;
+
+ STATIC_ASSERT (sizeof (u64) * SESSION_OPTIONS_N_OPTIONS <=
+ sizeof (mp->options),
+ "Out of options, fix api message definition");
+
+ segment_name_length = ARRAY_LEN (segment_name);
+
+ memset (a, 0, sizeof (*a));
+
+ clib_memcpy (&a->tep.ip, mp->ip,
+ (mp->is_ip4 ? sizeof (ip4_address_t) :
+ sizeof (ip6_address_t)));
+ a->tep.is_ip4 = mp->is_ip4;
+ a->tep.port = mp->port;
+ a->tep.vrf = mp->vrf;
+
+ a->api_client_index = mp->client_index;
+ a->options = mp->options;
+ a->segment_name = segment_name;
+ a->segment_name_length = segment_name_length;
+ a->session_cb_vft = &session_cb_vft;
+
+ rv = vnet_bind_uri (a);
+
+ /* *INDENT-OFF* */
+ REPLY_MACRO2 (VL_API_BIND_SOCK_REPLY, ({
+ rmp->retval = rv;
+ if (!rv)
+ {
+ rmp->segment_name_length = 0;
+ rmp->segment_size = mp->options[SESSION_OPTIONS_SEGMENT_SIZE];
+ if (segment_name_length)
+ {
+ memcpy(rmp->segment_name, segment_name, segment_name_length);
+ rmp->segment_name_length = segment_name_length;
+ }
+ rmp->server_event_queue_address = a->server_event_queue_address;
+ }
+ }));
+ /* *INDENT-ON* */
+}
+
+static void
+vl_api_unbind_sock_t_handler (vl_api_unbind_sock_t * mp)
+{
+ vl_api_unbind_sock_reply_t *rmp;
+ vnet_unbind_args_t _a, *a = &_a;
+ int rv;
+
+ a->api_client_index = mp->client_index;
+ a->handle = mp->handle;
+
+ rv = vnet_unbind (a);
+
+ REPLY_MACRO (VL_API_UNBIND_SOCK_REPLY);
+}
+
+static void
+vl_api_connect_sock_t_handler (vl_api_connect_sock_t * mp)
+{
+ vnet_connect_args_t _a, *a = &_a;
+
+ clib_memcpy (&a->tep.ip, mp->ip,
+ (mp->is_ip4 ? sizeof (ip4_address_t) :
+ sizeof (ip6_address_t)));
+ a->tep.is_ip4 = mp->is_ip4;
+ a->tep.port = mp->port;
+ a->tep.vrf = mp->vrf;
+ a->options = mp->options;
+ a->session_cb_vft = &session_cb_vft;
+ a->api_context = mp->context;
+ a->mp = mp;
+
+ vnet_connect (a);
+}
+
+static void
+vl_api_disconnect_sock_t_handler (vl_api_disconnect_sock_t * mp)
+{
+ vnet_disconnect_args_t _a, *a = &_a;
+ vl_api_disconnect_sock_reply_t *rmp;
+ int rv;
+
+ a->api_client_index = mp->client_index;
+ a->handle = mp->handle;
+ rv = vnet_disconnect (a);
+
+ REPLY_MACRO (VL_API_DISCONNECT_SOCK_REPLY);
+}
+
+static void
+vl_api_disconnect_sock_reply_t_handler (vl_api_disconnect_sock_reply_t * mp)
+{
+ vnet_disconnect_args_t _a, *a = &_a;
+
+ /* Client objected to disconnecting the session, log and continue */
+ if (mp->retval)
+ {
+ clib_warning ("client retval %d", mp->retval);
+ return;
+ }
+
+ a->api_client_index = mp->client_index;
+ a->handle = mp->handle;
+
+ vnet_disconnect (a);
+}
+
+static void
+vl_api_reset_sock_reply_t_handler (vl_api_reset_sock_reply_t * mp)
+{
+ stream_session_t *s;
+ u32 session_index, thread_index;
+
+ /* Client objected to resetting the session, log and continue */
+ if (mp->retval)
+ {
+ clib_warning ("client retval %d", mp->retval);
+ return;
+ }
+
+ if (api_parse_session_handle (mp->handle, &session_index, &thread_index))
+ {
+ clib_warning ("Invalid handle");
+ return;
+ }
+
+ s = stream_session_get (session_index, thread_index);
+
+ /* This comes as a response to a reset, transport only waiting for
+ * confirmation to remove connection state, no need to disconnect */
+ stream_session_cleanup (s);
+}
+
+static void
+vl_api_accept_sock_reply_t_handler (vl_api_accept_sock_reply_t * mp)
+{
+ stream_session_t *s;
+ u32 session_index, thread_index;
+
+ if (api_parse_session_handle (mp->handle, &session_index, &thread_index))
+ {
+ clib_warning ("Invalid handle");
+ return;
+ }
+ s = stream_session_get (session_index, thread_index);
+
+ if (mp->retval)
+ {
+ /* Server isn't interested, kill the session */
+ stream_session_disconnect (s);
+ return;
+ }
+
+ s->session_state = SESSION_STATE_READY;
+}
+
+#define vl_msg_name_crc_list
+#include <vnet/vnet_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+ foreach_vl_msg_name_crc_session;
+#undef _
+}
+
+/*
+ * session_api_hookup
+ * Add uri's API message handlers to the table.
+ * vlib has alread mapped shared memory and
+ * added the client registration handlers.
+ * See .../open-repo/vlib/memclnt_vlib.c:memclnt_process()
+ */
+static clib_error_t *
+session_api_hookup (vlib_main_t * vm)
+{
+ api_main_t *am = &api_main;
+
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_session_api_msg;
+#undef _
+
+ /*
+ * Messages which bounce off the data-plane to
+ * an API client. Simply tells the message handling infra not
+ * to free the message.
+ *
+ * Bounced message handlers MUST NOT block the data plane
+ */
+ am->message_bounce[VL_API_CONNECT_URI] = 1;
+ am->message_bounce[VL_API_CONNECT_SOCK] = 1;
+
+ /*
+ * Set up the (msg_name, crc, message-id) table
+ */
+ setup_message_id_table (am);
+
+ return 0;
+}
+
+VLIB_API_INIT_FUNCTION (session_api_hookup);
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vnet/session/application.h>
+#include <vnet/session/session.h>
+
+/**
+ * Format stream session as per the following format
+ *
+ * verbose:
+ * "Connection", "Rx fifo", "Tx fifo", "Session Index"
+ * non-verbose:
+ * "Connection"
+ */
+u8 *
+format_stream_session (u8 * s, va_list * args)
+{
+ stream_session_t *ss = va_arg (*args, stream_session_t *);
+ int verbose = va_arg (*args, int);
+ transport_proto_vft_t *tp_vft;
+ u8 *str = 0;
+
+ tp_vft = session_get_transport_vft (ss->session_type);
+
+ if (verbose)
+ str = format (0, "%-20llp%-20llp%-15lld", ss->server_rx_fifo,
+ ss->server_tx_fifo, stream_session_get_index (ss));
+
+ if (ss->session_state == SESSION_STATE_READY)
+ {
+ s = format (s, "%-40U%v", tp_vft->format_connection,
+ ss->connection_index, ss->thread_index, str);
+ }
+ else if (ss->session_state == SESSION_STATE_LISTENING)
+ {
+ s = format (s, "%-40U%v", tp_vft->format_listener, ss->connection_index,
+ str);
+ }
+ else if (ss->session_state == SESSION_STATE_READY)
+ {
+ s =
+ format (s, "%-40U%v", tp_vft->format_half_open, ss->connection_index,
+ str);
+ }
+ else if (ss->session_state == SESSION_STATE_CLOSED)
+ {
+ s = format (s, "[CL] %-40U%v", tp_vft->format_connection,
+ ss->connection_index, ss->thread_index, str);
+ }
+ else
+ {
+ clib_warning ("Session in unknown state!");
+ }
+
+ vec_free (str);
+
+ return s;
+}
+
+static clib_error_t *
+show_session_command_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ int verbose = 0, i;
+ stream_session_t *pool;
+ stream_session_t *s;
+ u8 *str = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "verbose"))
+ verbose = 1;
+ else
+ break;
+ }
+
+ for (i = 0; i < vec_len (smm->sessions); i++)
+ {
+ u32 once_per_pool;
+ pool = smm->sessions[i];
+
+ once_per_pool = 1;
+
+ if (pool_elts (pool))
+ {
+
+ vlib_cli_output (vm, "Thread %d: %d active sessions",
+ i, pool_elts (pool));
+ if (verbose)
+ {
+ if (once_per_pool)
+ {
+ str = format (str, "%-40s%-20s%-20s%-15s",
+ "Connection", "Rx fifo", "Tx fifo",
+ "Session Index");
+ vlib_cli_output (vm, "%v", str);
+ vec_reset_length (str);
+ once_per_pool = 0;
+ }
+
+ /* *INDENT-OFF* */
+ pool_foreach (s, pool,
+ ({
+ vlib_cli_output (vm, "%U", format_stream_session, s, verbose);
+ }));
+ /* *INDENT-ON* */
+ }
+ }
+ else
+ vlib_cli_output (vm, "Thread %d: no active sessions", i);
+ }
+ vec_free (str);
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_uri_command, static) =
+{
+.path = "show session",.short_help = "show session [verbose]",.function =
+ show_session_command_fn,};
+
+
+static clib_error_t *
+clear_session_command_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ u32 thread_index = 0;
+ u32 session_index = ~0;
+ stream_session_t *pool, *session;
+ application_t *server;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "thread %d", &thread_index))
+ ;
+ else if (unformat (input, "session %d", &session_index))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ if (session_index == ~0)
+ return clib_error_return (0, "session <nn> required, but not set.");
+
+ if (thread_index > vec_len (smm->sessions))
+ return clib_error_return (0, "thread %d out of range [0-%d]",
+ thread_index, vec_len (smm->sessions));
+
+ pool = smm->sessions[thread_index];
+
+ if (pool_is_free_index (pool, session_index))
+ return clib_error_return (0, "session %d not active", session_index);
+
+ session = pool_elt_at_index (pool, session_index);
+ server = application_get (session->app_index);
+
+ /* Disconnect both app and transport */
+ server->cb_fns.session_disconnect_callback (session);
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (clear_uri_session_command, static) =
+{
+.path = "clear session",.short_help =
+ "clear session thread <thread> session <index>",.function =
+ clear_session_command_fn,};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/session/transport.h>
+
+u32
+transport_endpoint_lookup (transport_endpoint_table_t *ht, ip46_address_t *ip,
+ u16 port)
+{
+ clib_bihash_kv_24_8_t kv;
+ int rv;
+
+ kv.key[0] = ip->as_u64[0];
+ kv.key[1] = ip->as_u64[1];
+ kv.key[2] = port;
+
+ rv = clib_bihash_search_inline_24_8 (ht, &kv);
+ if (rv == 0)
+ return kv.value;
+
+ return TRANSPORT_ENDPOINT_INVALID_INDEX;
+}
+
+void
+transport_endpoint_table_add (transport_endpoint_table_t *ht,
+ transport_endpoint_t *te, u32 value)
+{
+ clib_bihash_kv_24_8_t kv;
+
+ kv.key[0] = te->ip.as_u64[0];
+ kv.key[1] = te->ip.as_u64[1];
+ kv.key[2] = te->port;
+ kv.value = value;
+
+ clib_bihash_add_del_24_8 (ht, &kv, 1);
+}
+
+void
+transport_endpoint_table_del (transport_endpoint_table_t *ht,
+ transport_endpoint_t *te)
+{
+ clib_bihash_kv_24_8_t kv;
+
+ kv.key[0] = te->ip.as_u64[0];
+ kv.key[1] = te->ip.as_u64[1];
+ kv.key[2] = te->port;
+
+ clib_bihash_add_del_24_8 (ht, &kv, 0);
+}
+
+
+
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef VNET_VNET_URI_TRANSPORT_H_
+#define VNET_VNET_URI_TRANSPORT_H_
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vppinfra/bihash_16_8.h>
+#include <vppinfra/bihash_48_8.h>
+
+/*
+ * Protocol independent transport properties associated to a session
+ */
+typedef struct _transport_connection
+{
+ ip46_address_t rmt_ip; /**< Remote IP */
+ ip46_address_t lcl_ip; /**< Local IP */
+ u16 lcl_port; /**< Local port */
+ u16 rmt_port; /**< Remote port */
+ u8 proto; /**< Transport protocol id */
+
+ u32 s_index; /**< Parent session index */
+ u32 c_index; /**< Connection index in transport pool */
+ u8 is_ip4; /**< Flag if IP4 connection */
+ u32 thread_index; /**< Worker-thread index */
+
+ /** Macros for 'derived classes' where base is named "connection" */
+#define c_lcl_ip connection.lcl_ip
+#define c_rmt_ip connection.rmt_ip
+#define c_lcl_ip4 connection.lcl_ip.ip4
+#define c_rmt_ip4 connection.rmt_ip.ip4
+#define c_lcl_ip6 connection.lcl_ip.ip6
+#define c_rmt_ip6 connection.rmt_ip.ip6
+#define c_lcl_port connection.lcl_port
+#define c_rmt_port connection.rmt_port
+#define c_proto connection.proto
+#define c_state connection.state
+#define c_s_index connection.s_index
+#define c_c_index connection.c_index
+#define c_is_ip4 connection.is_ip4
+#define c_thread_index connection.thread_index
+} transport_connection_t;
+
+/*
+ * Transport protocol virtual function table
+ */
+typedef struct _transport_proto_vft
+{
+ /*
+ * Setup
+ */
+ u32 (*bind) (vlib_main_t *, u32, ip46_address_t *, u16);
+ u32 (*unbind) (vlib_main_t *, u32);
+ int (*open) (ip46_address_t * addr, u16 port_host_byte_order);
+ void (*close) (u32 conn_index, u32 thread_index);
+ void (*cleanup) (u32 conn_index, u32 thread_index);
+
+ /*
+ * Transmission
+ */
+ u32 (*push_header) (transport_connection_t * tconn, vlib_buffer_t * b);
+ u16 (*send_mss) (transport_connection_t * tc);
+ u32 (*send_space) (transport_connection_t * tc);
+ u32 (*rx_fifo_offset) (transport_connection_t * tc);
+
+ /*
+ * Connection retrieval
+ */
+ transport_connection_t *(*get_connection) (u32 conn_idx, u32 thread_idx);
+ transport_connection_t *(*get_listener) (u32 conn_index);
+ transport_connection_t *(*get_half_open) (u32 conn_index);
+
+ /*
+ * Format
+ */
+ u8 *(*format_connection) (u8 * s, va_list * args);
+ u8 *(*format_listener) (u8 * s, va_list * args);
+ u8 *(*format_half_open) (u8 * s, va_list * args);
+
+} transport_proto_vft_t;
+
+/* 16 octets */
+typedef CLIB_PACKED (struct
+ {
+ union
+ {
+ struct
+ {
+ ip4_address_t src; ip4_address_t dst;
+ u16 src_port;
+ u16 dst_port;
+ /* align by making this 4 octets even though its a 1-bit field
+ * NOTE: avoid key overlap with other transports that use 5 tuples for
+ * session identification.
+ */
+ u32 proto;
+ };
+ u64 as_u64[2];
+ };
+ }) v4_connection_key_t;
+
+typedef CLIB_PACKED (struct
+ {
+ union
+ {
+ struct
+ {
+ /* 48 octets */
+ ip6_address_t src; ip6_address_t dst;
+ u16 src_port;
+ u16 dst_port; u32 proto; u8 unused_for_now[8];
+ }; u64 as_u64[6];
+ };
+ }) v6_connection_key_t;
+
+typedef clib_bihash_kv_16_8_t session_kv4_t;
+typedef clib_bihash_kv_48_8_t session_kv6_t;
+
+always_inline void
+make_v4_ss_kv (session_kv4_t * kv, ip4_address_t * lcl, ip4_address_t * rmt,
+ u16 lcl_port, u16 rmt_port, u8 proto)
+{
+ v4_connection_key_t key;
+ memset (&key, 0, sizeof (v4_connection_key_t));
+
+ key.src.as_u32 = lcl->as_u32;
+ key.dst.as_u32 = rmt->as_u32;
+ key.src_port = lcl_port;
+ key.dst_port = rmt_port;
+ key.proto = proto;
+
+ kv->key[0] = key.as_u64[0];
+ kv->key[1] = key.as_u64[1];
+ kv->value = ~0ULL;
+}
+
+always_inline void
+make_v4_listener_kv (session_kv4_t * kv, ip4_address_t * lcl, u16 lcl_port,
+ u8 proto)
+{
+ v4_connection_key_t key;
+ memset (&key, 0, sizeof (v4_connection_key_t));
+
+ key.src.as_u32 = lcl->as_u32;
+ key.dst.as_u32 = 0;
+ key.src_port = lcl_port;
+ key.dst_port = 0;
+ key.proto = proto;
+
+ kv->key[0] = key.as_u64[0];
+ kv->key[1] = key.as_u64[1];
+ kv->value = ~0ULL;
+}
+
+always_inline void
+make_v4_ss_kv_from_tc (session_kv4_t * kv, transport_connection_t * t)
+{
+ return make_v4_ss_kv (kv, &t->lcl_ip.ip4, &t->rmt_ip.ip4, t->lcl_port,
+ t->rmt_port, t->proto);
+}
+
+always_inline void
+make_v6_ss_kv (session_kv6_t * kv, ip6_address_t * lcl, ip6_address_t * rmt,
+ u16 lcl_port, u16 rmt_port, u8 proto)
+{
+ v6_connection_key_t key;
+ memset (&key, 0, sizeof (v6_connection_key_t));
+
+ key.src.as_u64[0] = lcl->as_u64[0];
+ key.src.as_u64[1] = lcl->as_u64[1];
+ key.dst.as_u64[0] = rmt->as_u64[0];
+ key.dst.as_u64[1] = rmt->as_u64[1];
+ key.src_port = lcl_port;
+ key.dst_port = rmt_port;
+ key.proto = proto;
+
+ kv->key[0] = key.as_u64[0];
+ kv->key[1] = key.as_u64[1];
+ kv->value = ~0ULL;
+}
+
+always_inline void
+make_v6_listener_kv (session_kv6_t * kv, ip6_address_t * lcl, u16 lcl_port,
+ u8 proto)
+{
+ v6_connection_key_t key;
+ memset (&key, 0, sizeof (v6_connection_key_t));
+
+ key.src.as_u64[0] = lcl->as_u64[0];
+ key.src.as_u64[1] = lcl->as_u64[1];
+ key.dst.as_u64[0] = 0;
+ key.dst.as_u64[1] = 0;
+ key.src_port = lcl_port;
+ key.dst_port = 0;
+ key.proto = proto;
+
+ kv->key[0] = key.as_u64[0];
+ kv->key[1] = key.as_u64[1];
+ kv->value = ~0ULL;
+}
+
+always_inline void
+make_v6_ss_kv_from_tc (session_kv6_t * kv, transport_connection_t * t)
+{
+ make_v6_ss_kv (kv, &t->lcl_ip.ip6, &t->rmt_ip.ip6, t->lcl_port,
+ t->rmt_port, t->proto);
+}
+
+typedef struct _transport_endpoint
+{
+ ip46_address_t ip;
+ u16 port;
+ u8 is_ip4;
+ u32 vrf;
+} transport_endpoint_t;
+
+typedef clib_bihash_24_8_t transport_endpoint_table_t;
+
+#define TRANSPORT_ENDPOINT_INVALID_INDEX ((u32)~0)
+
+u32
+transport_endpoint_lookup (transport_endpoint_table_t * ht,
+ ip46_address_t * ip, u16 port);
+void transport_endpoint_table_add (transport_endpoint_table_t * ht,
+ transport_endpoint_t * te, u32 value);
+void transport_endpoint_table_del (transport_endpoint_table_t * ht,
+ transport_endpoint_t * te);
+
+#endif /* VNET_VNET_URI_TRANSPORT_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/tcp/tcp.h>
+#include <vnet/session/session.h>
+#include <vnet/fib/fib.h>
+#include <math.h>
+
+tcp_main_t tcp_main;
+
+static u32
+tcp_connection_bind (vlib_main_t * vm, u32 session_index, ip46_address_t * ip,
+ u16 port_host_byte_order, u8 is_ip4)
+{
+ tcp_main_t *tm = &tcp_main;
+ tcp_connection_t *listener;
+
+ pool_get (tm->listener_pool, listener);
+ memset (listener, 0, sizeof (*listener));
+
+ listener->c_c_index = listener - tm->listener_pool;
+ listener->c_lcl_port = clib_host_to_net_u16 (port_host_byte_order);
+
+ if (is_ip4)
+ listener->c_lcl_ip4.as_u32 = ip->ip4.as_u32;
+ else
+ clib_memcpy (&listener->c_lcl_ip6, &ip->ip6, sizeof (ip6_address_t));
+
+ listener->c_s_index = session_index;
+ listener->c_proto = SESSION_TYPE_IP4_TCP;
+ listener->state = TCP_STATE_LISTEN;
+ listener->c_is_ip4 = 1;
+
+ return listener->c_c_index;
+}
+
+u32
+tcp_session_bind_ip4 (vlib_main_t * vm, u32 session_index,
+ ip46_address_t * ip, u16 port_host_byte_order)
+{
+ return tcp_connection_bind (vm, session_index, ip, port_host_byte_order, 1);
+}
+
+u32
+tcp_session_bind_ip6 (vlib_main_t * vm, u32 session_index,
+ ip46_address_t * ip, u16 port_host_byte_order)
+{
+ return tcp_connection_bind (vm, session_index, ip, port_host_byte_order, 0);
+
+}
+
+static void
+tcp_session_unbind (u32 listener_index)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ pool_put_index (tm->listener_pool, listener_index);
+}
+
+u32
+tcp_session_unbind_ip4 (vlib_main_t * vm, u32 listener_index)
+{
+ tcp_session_unbind (listener_index);
+ return 0;
+}
+
+u32
+tcp_session_unbind_ip6 (vlib_main_t * vm, u32 listener_index)
+{
+ tcp_session_unbind (listener_index);
+ return 0;
+}
+
+transport_connection_t *
+tcp_session_get_listener (u32 listener_index)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ tcp_connection_t *tc;
+ tc = pool_elt_at_index (tm->listener_pool, listener_index);
+ return &tc->connection;
+}
+
+/**
+ * Cleans up connection state.
+ *
+ * No notifications.
+ */
+void
+tcp_connection_cleanup (tcp_connection_t * tc)
+{
+ tcp_main_t *tm = &tcp_main;
+ u32 tepi;
+ transport_endpoint_t *tep;
+
+ /* Cleanup local endpoint if this was an active connect */
+ tepi = transport_endpoint_lookup (&tm->local_endpoints_table, &tc->c_lcl_ip,
+ tc->c_lcl_port);
+
+ /*XXX lock */
+ if (tepi != TRANSPORT_ENDPOINT_INVALID_INDEX)
+ {
+ tep = pool_elt_at_index (tm->local_endpoints, tepi);
+ transport_endpoint_table_del (&tm->local_endpoints_table, tep);
+ pool_put (tm->local_endpoints, tep);
+ }
+
+ /* Make sure all timers are cleared */
+ tcp_connection_timers_reset (tc);
+
+ /* Check if half-open */
+ if (tc->state == TCP_STATE_SYN_SENT)
+ pool_put (tm->half_open_connections, tc);
+ else
+ pool_put (tm->connections[tc->c_thread_index], tc);
+}
+
+/**
+ * Connection removal.
+ *
+ * This should be called only once connection enters CLOSED state. Note
+ * that it notifies the session of the removal event, so if the goal is to
+ * just remove the connection, call tcp_connection_cleanup instead.
+ */
+void
+tcp_connection_del (tcp_connection_t * tc)
+{
+ stream_session_delete_notify (&tc->connection);
+ tcp_connection_cleanup (tc);
+}
+
+/**
+ * Begin connection closing procedure.
+ *
+ * If at the end the connection is not in CLOSED state, it is not removed.
+ * Instead, we rely on on TCP to advance through state machine to either
+ * 1) LAST_ACK (passive close) whereby when the last ACK is received
+ * tcp_connection_del is called. This notifies session of the delete and
+ * calls cleanup.
+ * 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers
+ * and cleanup is called.
+ */
+void
+tcp_connection_close (tcp_connection_t * tc)
+{
+ /* Send FIN if needed */
+ if (tc->state == TCP_STATE_ESTABLISHED || tc->state == TCP_STATE_SYN_RCVD
+ || tc->state == TCP_STATE_CLOSE_WAIT)
+ tcp_send_fin (tc);
+
+ /* Switch state */
+ if (tc->state == TCP_STATE_ESTABLISHED || tc->state == TCP_STATE_SYN_RCVD)
+ tc->state = TCP_STATE_FIN_WAIT_1;
+ else if (tc->state == TCP_STATE_SYN_SENT)
+ tc->state = TCP_STATE_CLOSED;
+ else if (tc->state == TCP_STATE_CLOSE_WAIT)
+ tc->state = TCP_STATE_LAST_ACK;
+
+ /* Half-close connections are not supported XXX */
+
+ if (tc->state == TCP_STATE_CLOSED)
+ tcp_connection_del (tc);
+}
+
+void
+tcp_session_close (u32 conn_index, u32 thread_index)
+{
+ tcp_connection_t *tc;
+ tc = tcp_connection_get (conn_index, thread_index);
+ tcp_connection_close (tc);
+}
+
+void
+tcp_session_cleanup (u32 conn_index, u32 thread_index)
+{
+ tcp_connection_t *tc;
+ tc = tcp_connection_get (conn_index, thread_index);
+ tcp_connection_cleanup (tc);
+}
+
+void *
+ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4)
+{
+ ip_lookup_main_t *lm4 = &ip4_main.lookup_main;
+ ip_lookup_main_t *lm6 = &ip6_main.lookup_main;
+ ip_interface_address_t *ia = 0;
+
+ if (is_ip4)
+ {
+ /* *INDENT-OFF* */
+ foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ ,
+ ({
+ return ip_interface_address_get_address (lm4, ia);
+ }));
+ /* *INDENT-ON* */
+ }
+ else
+ {
+ /* *INDENT-OFF* */
+ foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ ,
+ ({
+ return ip_interface_address_get_address (lm6, ia);
+ }));
+ /* *INDENT-ON* */
+ }
+
+ return 0;
+}
+
+/**
+ * Allocate local port and add if successful add entry to local endpoint
+ * table to mark the pair as used.
+ */
+u16
+tcp_allocate_local_port (tcp_main_t * tm, ip46_address_t * ip)
+{
+ u8 unique = 0;
+ transport_endpoint_t *tep;
+ u32 time_now, tei;
+ u16 min = 1024, max = 65535, tries; /* XXX configurable ? */
+
+ tries = max - min;
+ time_now = tcp_time_now ();
+
+ /* Start at random point or max */
+ pool_get (tm->local_endpoints, tep);
+ clib_memcpy (&tep->ip, ip, sizeof (*ip));
+ tep->port = random_u32 (&time_now) << 16;
+ tep->port = tep->port < min ? max : tep->port;
+
+ /* Search for first free slot */
+ while (tries)
+ {
+ tei = transport_endpoint_lookup (&tm->local_endpoints_table, &tep->ip,
+ tep->port);
+ if (tei == TRANSPORT_ENDPOINT_INVALID_INDEX)
+ {
+ unique = 1;
+ break;
+ }
+
+ tep->port--;
+
+ if (tep->port < min)
+ tep->port = max;
+
+ tries--;
+ }
+
+ if (unique)
+ {
+ transport_endpoint_table_add (&tm->local_endpoints_table, tep,
+ tep - tm->local_endpoints);
+
+ return tep->port;
+ }
+
+ /* Failed */
+ pool_put (tm->local_endpoints, tep);
+ return -1;
+}
+
+/**
+ * Initialize all connection timers as invalid
+ */
+void
+tcp_connection_timers_init (tcp_connection_t * tc)
+{
+ int i;
+
+ /* Set all to invalid */
+ for (i = 0; i < TCP_N_TIMERS; i++)
+ {
+ tc->timers[i] = TCP_TIMER_HANDLE_INVALID;
+ }
+
+ tc->rto = TCP_RTO_INIT;
+}
+
+/**
+ * Stop all connection timers
+ */
+void
+tcp_connection_timers_reset (tcp_connection_t * tc)
+{
+ int i;
+ for (i = 0; i < TCP_N_TIMERS; i++)
+ {
+ tcp_timer_reset (tc, i);
+ }
+}
+
+/** Initialize tcp connection variables
+ *
+ * Should be called after having received a msg from the peer, i.e., a SYN or
+ * a SYNACK, such that connection options have already been exchanged. */
+void
+tcp_connection_init_vars (tcp_connection_t * tc)
+{
+ tcp_connection_timers_init (tc);
+ tcp_set_snd_mss (tc);
+ tc->sack_sb.head = TCP_INVALID_SACK_HOLE_INDEX;
+ tcp_cc_init (tc);
+}
+
+int
+tcp_connection_open (ip46_address_t * rmt_addr, u16 rmt_port, u8 is_ip4)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ tcp_connection_t *tc;
+ fib_prefix_t prefix;
+ u32 fei, sw_if_index;
+ ip46_address_t lcl_addr;
+ u16 lcl_port;
+
+ /*
+ * Find the local address and allocate port
+ */
+ memset (&lcl_addr, 0, sizeof (lcl_addr));
+
+ /* Find a FIB path to the destination */
+ clib_memcpy (&prefix.fp_addr, rmt_addr, sizeof (*rmt_addr));
+ prefix.fp_proto = is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
+ prefix.fp_len = is_ip4 ? 32 : 128;
+
+ fei = fib_table_lookup (0, &prefix);
+
+ /* Couldn't find route to destination. Bail out. */
+ if (fei == FIB_NODE_INDEX_INVALID)
+ return -1;
+
+ sw_if_index = fib_entry_get_resolving_interface (fei);
+
+ if (sw_if_index == (u32) ~ 0)
+ return -1;
+
+ if (is_ip4)
+ {
+ ip4_address_t *ip4;
+ ip4 = ip_interface_get_first_ip (sw_if_index, 1);
+ lcl_addr.ip4.as_u32 = ip4->as_u32;
+ }
+ else
+ {
+ ip6_address_t *ip6;
+ ip6 = ip_interface_get_first_ip (sw_if_index, 0);
+ clib_memcpy (&lcl_addr.ip6, ip6, sizeof (*ip6));
+ }
+
+ /* Allocate source port */
+ lcl_port = tcp_allocate_local_port (tm, &lcl_addr);
+ if (lcl_port < 1)
+ return -1;
+
+ /*
+ * Create connection and send SYN
+ */
+
+ pool_get (tm->half_open_connections, tc);
+ memset (tc, 0, sizeof (*tc));
+
+ clib_memcpy (&tc->c_rmt_ip, rmt_addr, sizeof (ip46_address_t));
+ clib_memcpy (&tc->c_lcl_ip, &lcl_addr, sizeof (ip46_address_t));
+ tc->c_rmt_port = clib_host_to_net_u16 (rmt_port);
+ tc->c_lcl_port = clib_host_to_net_u16 (lcl_port);
+ tc->c_c_index = tc - tm->half_open_connections;
+ tc->c_is_ip4 = is_ip4;
+
+ /* The other connection vars will be initialized after SYN ACK */
+ tcp_connection_timers_init (tc);
+
+ tcp_send_syn (tc);
+
+ tc->state = TCP_STATE_SYN_SENT;
+
+ return tc->c_c_index;
+}
+
+int
+tcp_session_open_ip4 (ip46_address_t * addr, u16 port)
+{
+ return tcp_connection_open (addr, port, 1);
+}
+
+int
+tcp_session_open_ip6 (ip46_address_t * addr, u16 port)
+{
+ return tcp_connection_open (addr, port, 0);
+}
+
+u8 *
+format_tcp_session_ip4 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
+ tcp_connection_t *tc;
+
+ tc = tcp_connection_get (tci, thread_index);
+
+ s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip4_address,
+ &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip4_address, &tc->c_rmt_ip4,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+
+ return s;
+}
+
+u8 *
+format_tcp_session_ip6 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
+ tcp_connection_t *tc = tcp_connection_get (tci, thread_index);
+ s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip6_address,
+ &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip6_address, &tc->c_rmt_ip6,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+u8 *
+format_tcp_listener_session_ip4 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ tcp_connection_t *tc = tcp_listener_get (tci);
+ s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip4_address,
+ &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip4_address, &tc->c_rmt_ip4,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+u8 *
+format_tcp_listener_session_ip6 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ tcp_connection_t *tc = tcp_listener_get (tci);
+ s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip6_address,
+ &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip6_address, &tc->c_rmt_ip6,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+u8 *
+format_tcp_half_open_session_ip4 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ tcp_connection_t *tc = tcp_half_open_connection_get (tci);
+ s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip4_address,
+ &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip4_address, &tc->c_rmt_ip4,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+u8 *
+format_tcp_half_open_session_ip6 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ tcp_connection_t *tc = tcp_half_open_connection_get (tci);
+ s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip6_address,
+ &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip6_address, &tc->c_rmt_ip6,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+transport_connection_t *
+tcp_session_get_transport (u32 conn_index, u32 thread_index)
+{
+ tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index);
+ return &tc->connection;
+}
+
+transport_connection_t *
+tcp_half_open_session_get_transport (u32 conn_index)
+{
+ tcp_connection_t *tc = tcp_half_open_connection_get (conn_index);
+ return &tc->connection;
+}
+
+u16
+tcp_session_send_mss (transport_connection_t * trans_conn)
+{
+ tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
+ return tc->snd_mss;
+}
+
+u32
+tcp_session_send_space (transport_connection_t * trans_conn)
+{
+ tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
+ return tcp_available_snd_space (tc);
+}
+
+u32
+tcp_session_rx_fifo_offset (transport_connection_t * trans_conn)
+{
+ tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
+ return (tc->snd_una_max - tc->snd_una);
+}
+
+/* *INDENT-OFF* */
+const static transport_proto_vft_t tcp4_proto = {
+ .bind = tcp_session_bind_ip4,
+ .unbind = tcp_session_unbind_ip4,
+ .push_header = tcp_push_header,
+ .get_connection = tcp_session_get_transport,
+ .get_listener = tcp_session_get_listener,
+ .get_half_open = tcp_half_open_session_get_transport,
+ .open = tcp_session_open_ip4,
+ .close = tcp_session_close,
+ .cleanup = tcp_session_cleanup,
+ .send_mss = tcp_session_send_mss,
+ .send_space = tcp_session_send_space,
+ .rx_fifo_offset = tcp_session_rx_fifo_offset,
+ .format_connection = format_tcp_session_ip4,
+ .format_listener = format_tcp_listener_session_ip4,
+ .format_half_open = format_tcp_half_open_session_ip4
+};
+
+const static transport_proto_vft_t tcp6_proto = {
+ .bind = tcp_session_bind_ip6,
+ .unbind = tcp_session_unbind_ip6,
+ .push_header = tcp_push_header,
+ .get_connection = tcp_session_get_transport,
+ .get_listener = tcp_session_get_listener,
+ .get_half_open = tcp_half_open_session_get_transport,
+ .open = tcp_session_open_ip6,
+ .close = tcp_session_close,
+ .cleanup = tcp_session_cleanup,
+ .send_mss = tcp_session_send_mss,
+ .send_space = tcp_session_send_space,
+ .rx_fifo_offset = tcp_session_rx_fifo_offset,
+ .format_connection = format_tcp_session_ip6,
+ .format_listener = format_tcp_listener_session_ip6,
+ .format_half_open = format_tcp_half_open_session_ip6
+};
+/* *INDENT-ON* */
+
+void
+tcp_timer_keep_handler (u32 conn_index)
+{
+ u32 cpu_index = os_get_cpu_number ();
+ tcp_connection_t *tc;
+
+ tc = tcp_connection_get (conn_index, cpu_index);
+ tc->timers[TCP_TIMER_KEEP] = TCP_TIMER_HANDLE_INVALID;
+
+ tcp_connection_close (tc);
+}
+
+void
+tcp_timer_establish_handler (u32 conn_index)
+{
+ tcp_connection_t *tc;
+ u8 sst;
+
+ tc = tcp_half_open_connection_get (conn_index);
+ tc->timers[TCP_TIMER_ESTABLISH] = TCP_TIMER_HANDLE_INVALID;
+
+ ASSERT (tc->state == TCP_STATE_SYN_SENT);
+
+ sst = tc->c_is_ip4 ? SESSION_TYPE_IP4_TCP : SESSION_TYPE_IP6_TCP;
+ stream_session_connect_notify (&tc->connection, sst, 1 /* fail */ );
+
+ tcp_connection_cleanup (tc);
+}
+
+void
+tcp_timer_2msl_handler (u32 conn_index)
+{
+ u32 cpu_index = os_get_cpu_number ();
+ tcp_connection_t *tc;
+
+ tc = tcp_connection_get (conn_index, cpu_index);
+ tc->timers[TCP_TIMER_2MSL] = TCP_TIMER_HANDLE_INVALID;
+
+ tcp_connection_del (tc);
+}
+
+/* *INDENT-OFF* */
+static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] =
+{
+ tcp_timer_retransmit_handler,
+ tcp_timer_delack_handler,
+ 0,
+ tcp_timer_keep_handler,
+ tcp_timer_2msl_handler,
+ tcp_timer_retransmit_syn_handler,
+ tcp_timer_establish_handler
+};
+/* *INDENT-ON* */
+
+static void
+tcp_expired_timers_dispatch (u32 * expired_timers)
+{
+ int i;
+ u32 connection_index, timer_id;
+
+ for (i = 0; i < vec_len (expired_timers); i++)
+ {
+ /* Get session index and timer id */
+ connection_index = expired_timers[i] & 0x0FFFFFFF;
+ timer_id = expired_timers[i] >> 28;
+
+ /* Handle expiration */
+ (*timer_expiration_handlers[timer_id]) (connection_index);
+ }
+}
+
+void
+tcp_initialize_timer_wheels (tcp_main_t * tm)
+{
+ tw_timer_wheel_16t_2w_512sl_t *tw;
+ vec_foreach (tw, tm->timer_wheels)
+ {
+ tw_timer_wheel_init_16t_2w_512sl (tw, tcp_expired_timers_dispatch,
+ 100e-3 /* timer period 100ms */ , ~0);
+ tw->last_run_time = vlib_time_now (tm->vlib_main);
+ }
+}
+
+clib_error_t *
+tcp_init (vlib_main_t * vm)
+{
+ ip_main_t *im = &ip_main;
+ ip_protocol_info_t *pi;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ clib_error_t *error = 0;
+ u32 num_threads;
+
+ tm->vlib_main = vm;
+ tm->vnet_main = vnet_get_main ();
+
+ if ((error = vlib_call_init_function (vm, ip_main_init)))
+ return error;
+ if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
+ return error;
+ if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
+ return error;
+
+ /*
+ * Registrations
+ */
+
+ /* Register with IP */
+ pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP);
+ if (pi == 0)
+ return clib_error_return (0, "TCP protocol info AWOL");
+ pi->format_header = format_tcp_header;
+ pi->unformat_pg_edit = unformat_pg_tcp_header;
+
+ ip4_register_protocol (IP_PROTOCOL_TCP, tcp4_input_node.index);
+
+ /* Register as transport with URI */
+ session_register_transport (SESSION_TYPE_IP4_TCP, &tcp4_proto);
+ session_register_transport (SESSION_TYPE_IP6_TCP, &tcp6_proto);
+
+ /*
+ * Initialize data structures
+ */
+
+ num_threads = 1 /* main thread */ + vtm->n_threads;
+ vec_validate (tm->connections, num_threads - 1);
+
+ /* Initialize per worker thread tx buffers (used for control messages) */
+ vec_validate (tm->tx_buffers, num_threads - 1);
+
+ /* Initialize timer wheels */
+ vec_validate (tm->timer_wheels, num_threads - 1);
+ tcp_initialize_timer_wheels (tm);
+
+ vec_validate (tm->delack_connections, num_threads - 1);
+
+ /* Initialize clocks per tick for TCP timestamp. Used to compute
+ * monotonically increasing timestamps. */
+ tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
+ / TCP_TSTAMP_RESOLUTION;
+
+ clib_bihash_init_24_8 (&tm->local_endpoints_table, "local endpoint table",
+ 200000 /* $$$$ config parameter nbuckets */ ,
+ (64 << 20) /*$$$ config parameter table size */ );
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (tcp_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _vnet_tcp_h_
+#define _vnet_tcp_h_
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/tcp/tcp_packet.h>
+#include <vnet/tcp/tcp_timer.h>
+#include <vnet/session/transport.h>
+#include <vnet/session/session.h>
+
+#define TCP_TICK 10e-3 /**< TCP tick period (s) */
+#define THZ 1/TCP_TICK /**< TCP tick frequency */
+#define TCP_TSTAMP_RESOLUTION TCP_TICK /**< Time stamp resolution */
+#define TCP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ /**< 24 days */
+#define TCP_MAX_OPTION_SPACE 40
+
+#define TCP_DUPACK_THRESHOLD 3
+#define TCP_DEFAULT_RX_FIFO_SIZE 64 << 10
+
+/** TCP FSM state definitions as per RFC793. */
+#define foreach_tcp_fsm_state \
+ _(CLOSED, "CLOSED") \
+ _(LISTEN, "LISTEN") \
+ _(SYN_SENT, "SYN_SENT") \
+ _(SYN_RCVD, "SYN_RCVD") \
+ _(ESTABLISHED, "ESTABLISHED") \
+ _(CLOSE_WAIT, "CLOSE_WAIT") \
+ _(FIN_WAIT_1, "FIN_WAIT_1") \
+ _(LAST_ACK, "LAST_ACK") \
+ _(CLOSING, "CLOSING") \
+ _(FIN_WAIT_2, "FIN_WAIT_2") \
+ _(TIME_WAIT, "TIME_WAIT")
+
+typedef enum _tcp_state
+{
+#define _(sym, str) TCP_STATE_##sym,
+ foreach_tcp_fsm_state
+#undef _
+ TCP_N_STATES
+} tcp_state_t;
+
+format_function_t format_tcp_state;
+
+/** TCP timers */
+#define foreach_tcp_timer \
+ _(RETRANSMIT, "RETRANSMIT") \
+ _(DELACK, "DELAYED ACK") \
+ _(PERSIST, "PERSIST") \
+ _(KEEP, "KEEP") \
+ _(2MSL, "2MSL") \
+ _(RETRANSMIT_SYN, "RETRANSMIT_SYN") \
+ _(ESTABLISH, "ESTABLISH")
+
+typedef enum _tcp_timers
+{
+#define _(sym, str) TCP_TIMER_##sym,
+ foreach_tcp_timer
+#undef _
+ TCP_N_TIMERS
+} tcp_timers_e;
+
+typedef void (timer_expiration_handler) (u32 index);
+
+extern timer_expiration_handler tcp_timer_delack_handler;
+extern timer_expiration_handler tcp_timer_retransmit_handler;
+extern timer_expiration_handler tcp_timer_retransmit_syn_handler;
+
+#define TCP_TIMER_HANDLE_INVALID ((u32) ~0)
+
+/* Timer delays as multiples of 100ms */
+#define TCP_TO_TIMER_TICK TCP_TICK*10 /* Period for converting from TCP
+ * ticks to timer units */
+#define TCP_DELACK_TIME 1 /* 0.1s */
+#define TCP_ESTABLISH_TIME 750 /* 75s */
+#define TCP_2MSL_TIME 300 /* 30s */
+
+#define TCP_RTO_MAX 60 * THZ /* Min max RTO (60s) as per RFC6298 */
+#define TCP_RTT_MAX 30 * THZ /* 30s (probably too much) */
+#define TCP_RTO_SYN_RETRIES 3 /* SYN retries without doubling RTO */
+#define TCP_RTO_INIT 1 * THZ /* Initial retransmit timer */
+
+void tcp_update_time (f64 now, u32 thread_index);
+
+/** TCP connection flags */
+#define foreach_tcp_connection_flag \
+ _(DELACK, "Delay ACK") \
+ _(SNDACK, "Send ACK") \
+ _(BURSTACK, "Burst ACK set") \
+ _(SENT_RCV_WND0, "Sent 0 receive window") \
+ _(RECOVERY, "Recovery on") \
+ _(FAST_RECOVERY, "Fast Recovery on")
+
+typedef enum _tcp_connection_flag_bits
+{
+#define _(sym, str) TCP_CONN_##sym##_BIT,
+ foreach_tcp_connection_flag
+#undef _
+ TCP_CONN_N_FLAG_BITS
+} tcp_connection_flag_bits_e;
+
+typedef enum _tcp_connection_flag
+{
+#define _(sym, str) TCP_CONN_##sym = 1 << TCP_CONN_##sym##_BIT,
+ foreach_tcp_connection_flag
+#undef _
+ TCP_CONN_N_FLAGS
+} tcp_connection_flags_e;
+
+/** TCP buffer flags */
+#define foreach_tcp_buf_flag \
+ _ (ACK) /**< Sending ACK. */ \
+ _ (DUPACK) /**< Sending DUPACK. */ \
+
+enum
+{
+#define _(f) TCP_BUF_BIT_##f,
+ foreach_tcp_buf_flag
+#undef _
+ TCP_N_BUF_BITS,
+};
+
+enum
+{
+#define _(f) TCP_BUF_FLAG_##f = 1 << TCP_BUF_BIT_##f,
+ foreach_tcp_buf_flag
+#undef _
+};
+
+#define TCP_MAX_SACK_BLOCKS 5 /**< Max number of SACK blocks stored */
+#define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0)
+
+typedef struct _sack_scoreboard_hole
+{
+ u32 next; /**< Index for next entry in linked list */
+ u32 prev; /**< Index for previous entry in linked list */
+ u32 start; /**< Start sequence number */
+ u32 end; /**< End sequence number */
+} sack_scoreboard_hole_t;
+
+typedef struct _sack_scoreboard
+{
+ sack_scoreboard_hole_t *holes; /**< Pool of holes */
+ u32 head; /**< Index to first entry */
+ u32 sacked_bytes; /**< Number of bytes sacked in sb */
+} sack_scoreboard_t;
+
+typedef enum _tcp_cc_algorithm_type
+{
+ TCP_CC_NEWRENO,
+} tcp_cc_algorithm_type_e;
+
+typedef struct _tcp_cc_algorithm tcp_cc_algorithm_t;
+
+typedef enum _tcp_cc_ack_t
+{
+ TCP_CC_ACK,
+ TCP_CC_DUPACK,
+ TCP_CC_PARTIALACK
+} tcp_cc_ack_t;
+
+typedef struct _tcp_connection
+{
+ transport_connection_t connection; /**< Common transport data. First! */
+
+ u8 state; /**< TCP state as per tcp_state_t */
+ u16 flags; /**< Connection flags (see tcp_conn_flags_e) */
+ u32 timers[TCP_N_TIMERS]; /**< Timer handles into timer wheel */
+
+ /* TODO RFC4898 */
+
+ /** Send sequence variables RFC793 */
+ u32 snd_una; /**< oldest unacknowledged sequence number */
+ u32 snd_una_max; /**< newest unacknowledged sequence number + 1*/
+ u32 snd_wnd; /**< send window */
+ u32 snd_wl1; /**< seq number used for last snd.wnd update */
+ u32 snd_wl2; /**< ack number used for last snd.wnd update */
+ u32 snd_nxt; /**< next seq number to be sent */
+
+ /** Receive sequence variables RFC793 */
+ u32 rcv_nxt; /**< next sequence number expected */
+ u32 rcv_wnd; /**< receive window we expect */
+
+ u32 rcv_las; /**< rcv_nxt at last ack sent/rcv_wnd update */
+ u32 iss; /**< initial sent sequence */
+ u32 irs; /**< initial remote sequence */
+
+ /* Options */
+ tcp_options_t opt; /**< TCP connection options parsed */
+ u8 rcv_wscale; /**< Window scale to advertise to peer */
+ u8 snd_wscale; /**< Window scale to use when sending */
+ u32 tsval_recent; /**< Last timestamp received */
+ u32 tsval_recent_age; /**< When last updated tstamp_recent*/
+
+ sack_block_t *snd_sacks; /**< Vector of SACKs to send. XXX Fixed size? */
+ sack_scoreboard_t sack_sb; /**< SACK "scoreboard" that tracks holes */
+
+ u8 rcv_dupacks; /**< Number of DUPACKs received */
+ u8 snt_dupacks; /**< Number of DUPACKs sent in a burst */
+
+ /* Congestion control */
+ u32 cwnd; /**< Congestion window */
+ u32 ssthresh; /**< Slow-start threshold */
+ u32 prev_ssthresh; /**< ssthresh before congestion */
+ u32 bytes_acked; /**< Bytes acknowledged by current segment */
+ u32 rtx_bytes; /**< Retransmitted bytes */
+ u32 tsecr_last_ack; /**< Timestamp echoed to us in last health ACK */
+ tcp_cc_algorithm_t *cc_algo; /**< Congestion control algorithm */
+
+ /* RTT and RTO */
+ u32 rto; /**< Retransmission timeout */
+ u32 rto_boff; /**< Index for RTO backoff */
+ u32 srtt; /**< Smoothed RTT */
+ u32 rttvar; /**< Smoothed mean RTT difference. Approximates variance */
+ u32 rtt_ts; /**< Timestamp for tracked ACK */
+ u32 rtt_seq; /**< Sequence number for tracked ACK */
+
+ u16 snd_mss; /**< Send MSS */
+} tcp_connection_t;
+
+struct _tcp_cc_algorithm
+{
+ void (*rcv_ack) (tcp_connection_t * tc);
+ void (*rcv_cong_ack) (tcp_connection_t * tc, tcp_cc_ack_t ack);
+ void (*congestion) (tcp_connection_t * tc);
+ void (*recovered) (tcp_connection_t * tc);
+ void (*init) (tcp_connection_t * tc);
+};
+
+#define tcp_fastrecovery_on(tc) (tc)->flags |= TCP_CONN_FAST_RECOVERY
+#define tcp_fastrecovery_off(tc) (tc)->flags &= ~TCP_CONN_FAST_RECOVERY
+#define tcp_in_fastrecovery(tc) ((tc)->flags & TCP_CONN_FAST_RECOVERY)
+#define tcp_in_recovery(tc) ((tc)->flags & (TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY))
+#define tcp_recovery_off(tc) ((tc)->flags &= ~(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY))
+#define tcp_in_slowstart(tc) (tc->cwnd < tc->ssthresh)
+
+typedef enum
+{
+ TCP_IP4,
+ TCP_IP6,
+ TCP_N_AF,
+} tcp_af_t;
+
+typedef enum _tcp_error
+{
+#define tcp_error(n,s) TCP_ERROR_##n,
+#include <vnet/tcp/tcp_error.def>
+#undef tcp_error
+ TCP_N_ERROR,
+} tcp_error_t;
+
+typedef struct _tcp_lookup_dispatch
+{
+ u8 next, error;
+} tcp_lookup_dispatch_t;
+
+typedef struct _tcp_main
+{
+ /* Per-worker thread tcp connection pools */
+ tcp_connection_t **connections;
+
+ /* Pool of listeners. */
+ tcp_connection_t *listener_pool;
+
+ /** Dispatch table by state and flags */
+ tcp_lookup_dispatch_t dispatch_table[TCP_N_STATES][64];
+
+ u8 log2_tstamp_clocks_per_tick;
+ f64 tstamp_ticks_per_clock;
+
+ /** per-worker tx buffer free lists */
+ u32 **tx_buffers;
+
+ /* Per worker-thread timer wheel for connections timers */
+ tw_timer_wheel_16t_2w_512sl_t *timer_wheels;
+
+ /* Convenience per worker-thread vector of connections to DELACK */
+ u32 **delack_connections;
+
+ /* Pool of half-open connections on which we've sent a SYN */
+ tcp_connection_t *half_open_connections;
+
+ /* Pool of local TCP endpoints */
+ transport_endpoint_t *local_endpoints;
+
+ /* Local endpoints lookup table */
+ transport_endpoint_table_t local_endpoints_table;
+
+ /* Congestion control algorithms registered */
+ tcp_cc_algorithm_t *cc_algos;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+ ip4_main_t *ip4_main;
+ ip6_main_t *ip6_main;
+} tcp_main_t;
+
+extern tcp_main_t tcp_main;
+extern vlib_node_registration_t tcp4_input_node;
+extern vlib_node_registration_t tcp6_input_node;
+extern vlib_node_registration_t tcp4_output_node;
+extern vlib_node_registration_t tcp6_output_node;
+
+always_inline tcp_main_t *
+vnet_get_tcp_main ()
+{
+ return &tcp_main;
+}
+
+always_inline tcp_connection_t *
+tcp_connection_get (u32 conn_index, u32 thread_index)
+{
+ return pool_elt_at_index (tcp_main.connections[thread_index], conn_index);
+}
+
+always_inline tcp_connection_t *
+tcp_connection_get_if_valid (u32 conn_index, u32 thread_index)
+{
+ if (tcp_main.connections[thread_index] == 0)
+ return 0;
+ if (pool_is_free_index (tcp_main.connections[thread_index], conn_index))
+ return 0;
+ return pool_elt_at_index (tcp_main.connections[thread_index], conn_index);
+}
+
+void tcp_connection_close (tcp_connection_t * tc);
+void tcp_connection_cleanup (tcp_connection_t * tc);
+void tcp_connection_del (tcp_connection_t * tc);
+
+always_inline tcp_connection_t *
+tcp_listener_get (u32 tli)
+{
+ return pool_elt_at_index (tcp_main.listener_pool, tli);
+}
+
+always_inline tcp_connection_t *
+tcp_half_open_connection_get (u32 conn_index)
+{
+ return pool_elt_at_index (tcp_main.half_open_connections, conn_index);
+}
+
+void tcp_make_ack (tcp_connection_t * ts, vlib_buffer_t * b);
+void tcp_make_finack (tcp_connection_t * tc, vlib_buffer_t * b);
+void tcp_make_synack (tcp_connection_t * ts, vlib_buffer_t * b);
+void tcp_send_reset (vlib_buffer_t * pkt, u8 is_ip4);
+void tcp_send_syn (tcp_connection_t * tc);
+void tcp_send_fin (tcp_connection_t * tc);
+void tcp_set_snd_mss (tcp_connection_t * tc);
+
+always_inline u32
+tcp_end_seq (tcp_header_t * th, u32 len)
+{
+ return th->seq_number + tcp_is_syn (th) + tcp_is_fin (th) + len;
+}
+
+/* Modulo arithmetic for TCP sequence numbers */
+#define seq_lt(_s1, _s2) ((i32)((_s1)-(_s2)) < 0)
+#define seq_leq(_s1, _s2) ((i32)((_s1)-(_s2)) <= 0)
+#define seq_gt(_s1, _s2) ((i32)((_s1)-(_s2)) > 0)
+#define seq_geq(_s1, _s2) ((i32)((_s1)-(_s2)) >= 0)
+
+/* Modulo arithmetic for timestamps */
+#define timestamp_lt(_t1, _t2) ((i32)((_t1)-(_t2)) < 0)
+#define timestamp_leq(_t1, _t2) ((i32)((_t1)-(_t2)) <= 0)
+
+always_inline u32
+tcp_flight_size (const tcp_connection_t * tc)
+{
+ return tc->snd_una_max - tc->snd_una - tc->sack_sb.sacked_bytes
+ + tc->rtx_bytes;
+}
+
+/**
+ * Initial cwnd as per RFC5681
+ */
+always_inline u32
+tcp_initial_cwnd (const tcp_connection_t * tc)
+{
+ if (tc->snd_mss > 2190)
+ return 2 * tc->snd_mss;
+ else if (tc->snd_mss > 1095)
+ return 3 * tc->snd_mss;
+ else
+ return 4 * tc->snd_mss;
+}
+
+always_inline u32
+tcp_loss_wnd (const tcp_connection_t * tc)
+{
+ return tc->snd_mss;
+}
+
+always_inline u32
+tcp_available_wnd (const tcp_connection_t * tc)
+{
+ return clib_min (tc->cwnd, tc->snd_wnd);
+}
+
+always_inline u32
+tcp_available_snd_space (const tcp_connection_t * tc)
+{
+ u32 available_wnd = tcp_available_wnd (tc);
+ u32 flight_size = tcp_flight_size (tc);
+
+ if (available_wnd <= flight_size)
+ return 0;
+
+ return available_wnd - flight_size;
+}
+
+void tcp_retransmit_first_unacked (tcp_connection_t * tc);
+
+void tcp_fast_retransmit (tcp_connection_t * tc);
+
+always_inline u32
+tcp_time_now (void)
+{
+ return clib_cpu_time_now () * tcp_main.tstamp_ticks_per_clock;
+}
+
+u32 tcp_push_header (transport_connection_t * tconn, vlib_buffer_t * b);
+
+u32
+tcp_prepare_retransmit_segment (tcp_connection_t * tc, vlib_buffer_t * b,
+ u32 max_bytes);
+
+void tcp_connection_timers_init (tcp_connection_t * tc);
+void tcp_connection_timers_reset (tcp_connection_t * tc);
+
+void tcp_connection_init_vars (tcp_connection_t * tc);
+
+always_inline void
+tcp_connection_force_ack (tcp_connection_t * tc, vlib_buffer_t * b)
+{
+ /* Reset flags, make sure ack is sent */
+ tc->flags = TCP_CONN_SNDACK;
+ vnet_buffer (b)->tcp.flags &= ~TCP_BUF_FLAG_DUPACK;
+}
+
+always_inline void
+tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval)
+{
+ tc->timers[timer_id]
+ = tw_timer_start_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
+ tc->c_c_index, timer_id, interval);
+}
+
+always_inline void
+tcp_retransmit_timer_set (tcp_main_t * tm, tcp_connection_t * tc)
+{
+ /* XXX Switch to faster TW */
+ tcp_timer_set (tc, TCP_TIMER_RETRANSMIT,
+ clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
+}
+
+always_inline void
+tcp_timer_reset (tcp_connection_t * tc, u8 timer_id)
+{
+ if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID)
+ return;
+
+ tw_timer_stop_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
+ tc->timers[timer_id]);
+ tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
+}
+
+always_inline void
+tcp_timer_update (tcp_connection_t * tc, u8 timer_id, u32 interval)
+{
+ if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)
+ tw_timer_stop_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
+ tc->timers[timer_id]);
+ tc->timers[timer_id] =
+ tw_timer_start_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
+ tc->c_c_index, timer_id, interval);
+}
+
+always_inline u8
+tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer)
+{
+ return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID;
+}
+
+void
+scoreboard_remove_hole (sack_scoreboard_t * sb,
+ sack_scoreboard_hole_t * hole);
+
+always_inline sack_scoreboard_hole_t *
+scoreboard_next_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
+{
+ if (hole->next != TCP_INVALID_SACK_HOLE_INDEX)
+ return pool_elt_at_index (sb->holes, hole->next);
+ return 0;
+}
+
+always_inline sack_scoreboard_hole_t *
+scoreboard_first_hole (sack_scoreboard_t * sb)
+{
+ if (sb->head != TCP_INVALID_SACK_HOLE_INDEX)
+ return pool_elt_at_index (sb->holes, sb->head);
+ return 0;
+}
+
+always_inline void
+scoreboard_clear (sack_scoreboard_t * sb)
+{
+ sack_scoreboard_hole_t *hole = scoreboard_first_hole (sb);
+ while ((hole = scoreboard_first_hole (sb)))
+ {
+ scoreboard_remove_hole (sb, hole);
+ }
+}
+
+always_inline u32
+scoreboard_hole_bytes (sack_scoreboard_hole_t * hole)
+{
+ return hole->end - hole->start;
+}
+
+always_inline void
+tcp_cc_algo_register (tcp_cc_algorithm_type_e type,
+ const tcp_cc_algorithm_t * vft)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vec_validate (tm->cc_algos, type);
+
+ tm->cc_algos[type] = *vft;
+}
+
+always_inline tcp_cc_algorithm_t *
+tcp_cc_algo_get (tcp_cc_algorithm_type_e type)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ return &tm->cc_algos[type];
+}
+
+void tcp_cc_init (tcp_connection_t * tc);
+
+/**
+ * Push TCP header to buffer
+ *
+ * @param vm - vlib_main
+ * @param b - buffer to write the header to
+ * @param sp_net - source port net order
+ * @param dp_net - destination port net order
+ * @param seq - sequence number net order
+ * @param ack - ack number net order
+ * @param tcp_hdr_opts_len - header and options length in bytes
+ * @param flags - header flags
+ * @param wnd - window size
+ *
+ * @return - pointer to start of TCP header
+ */
+always_inline void *
+vlib_buffer_push_tcp_net_order (vlib_buffer_t * b, u16 sp, u16 dp, u32 seq,
+ u32 ack, u8 tcp_hdr_opts_len, u8 flags,
+ u16 wnd)
+{
+ tcp_header_t *th;
+
+ th = vlib_buffer_push_uninit (b, tcp_hdr_opts_len);
+
+ th->src_port = sp;
+ th->dst_port = dp;
+ th->seq_number = seq;
+ th->ack_number = ack;
+ th->data_offset_and_reserved = (tcp_hdr_opts_len >> 2) << 4;
+ th->flags = flags;
+ th->window = wnd;
+ th->checksum = 0;
+ th->urgent_pointer = 0;
+ return th;
+}
+
+/**
+ * Push TCP header to buffer
+ *
+ * @param vm - vlib_main
+ * @param b - buffer to write the header to
+ * @param sp_net - source port net order
+ * @param dp_net - destination port net order
+ * @param seq - sequence number host order
+ * @param ack - ack number host order
+ * @param tcp_hdr_opts_len - header and options length in bytes
+ * @param flags - header flags
+ * @param wnd - window size
+ *
+ * @return - pointer to start of TCP header
+ */
+always_inline void *
+vlib_buffer_push_tcp (vlib_buffer_t * b, u16 sp_net, u16 dp_net, u32 seq,
+ u32 ack, u8 tcp_hdr_opts_len, u8 flags, u16 wnd)
+{
+ return vlib_buffer_push_tcp_net_order (b, sp_net, dp_net,
+ clib_host_to_net_u32 (seq),
+ clib_host_to_net_u32 (ack),
+ tcp_hdr_opts_len, flags,
+ clib_host_to_net_u16 (wnd));
+}
+
+#endif /* _vnet_tcp_h_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+tcp_error (NONE, "no error")
+tcp_error (NO_LISTENER, "no listener for dst port")
+tcp_error (LOOKUP_DROPS, "lookup drops")
+tcp_error (DISPATCH, "Dispatch error")
+tcp_error (ENQUEUED, "Packets pushed into rx fifo")
+tcp_error (PURE_ACK, "Pure acks")
+tcp_error (SYNS_RCVD, "SYNs received")
+tcp_error (SYN_ACKS_RCVD, "SYN-ACKs received")
+tcp_error (NOT_READY, "Session not ready for packets")
+tcp_error (FIFO_FULL, "Packets dropped for lack of rx fifo space")
+tcp_error (EVENT_FIFO_FULL, "Events not sent for lack of event fifo space")
+tcp_error (API_QUEUE_FULL, "Sessions not created for lack of API queue space")
+tcp_error (CREATE_SESSION_FAIL, "Sessions couldn't be allocated")
+tcp_error (SEGMENT_INVALID, "Invalid segment")
+tcp_error (ACK_INVALID, "Invalid ACK")
+tcp_error (ACK_DUP, "Duplicate ACK")
+tcp_error (ACK_OLD, "Old ACK")
+tcp_error (PKTS_SENT, "Packets sent")
+tcp_error (FILTERED_DUPACKS, "Filtered duplicate ACKs")
+tcp_error (RST_SENT, "Resets sent")
\ No newline at end of file
--- /dev/null
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * tcp/tcp_format.c: tcp formatting
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vnet/ip/ip.h>
+#include <vnet/tcp/tcp.h>
+
+static u8 *
+format_tcp_flags (u8 * s, va_list * args)
+{
+ int flags = va_arg (*args, int);
+
+#define _(f) if (flags & TCP_FLAG_##f) s = format (s, "%s, ", #f);
+ foreach_tcp_flag
+#undef _
+ return s;
+}
+
+/* Format TCP header. */
+u8 *
+format_tcp_header (u8 * s, va_list * args)
+{
+ tcp_header_t *tcp = va_arg (*args, tcp_header_t *);
+ u32 max_header_bytes = va_arg (*args, u32);
+ u32 header_bytes;
+ uword indent;
+
+ /* Nothing to do. */
+ if (max_header_bytes < sizeof (tcp[0]))
+ return format (s, "TCP header truncated");
+
+ indent = format_get_indent (s);
+ indent += 2;
+ header_bytes = tcp_header_bytes (tcp);
+
+ s = format (s, "TCP: %d -> %d", clib_net_to_host_u16 (tcp->src),
+ clib_net_to_host_u16 (tcp->dst));
+
+ s = format (s, "\n%Useq. 0x%08x ack 0x%08x", format_white_space, indent,
+ clib_net_to_host_u32 (tcp->seq_number),
+ clib_net_to_host_u32 (tcp->ack_number));
+
+ s = format (s, "\n%Uflags %U, tcp header: %d bytes", format_white_space,
+ indent, format_tcp_flags, tcp->flags, header_bytes);
+
+ s = format (s, "\n%Uwindow %d, checksum 0x%04x", format_white_space, indent,
+ clib_net_to_host_u16 (tcp->window),
+ clib_net_to_host_u16 (tcp->checksum));
+
+
+#if 0
+ /* Format TCP options. */
+ {
+ u8 *o;
+ u8 *option_start = (void *) (tcp + 1);
+ u8 *option_end = (void *) tcp + header_bytes;
+
+ for (o = option_start; o < option_end;)
+ {
+ u32 length = o[1];
+ switch (o[0])
+ {
+ case TCP_OPTION_END:
+ length = 1;
+ o = option_end;
+ break;
+
+ case TCP_OPTION_NOOP:
+ length = 1;
+ break;
+
+ }
+ }
+ }
+#endif
+
+ /* Recurse into next protocol layer. */
+ if (max_header_bytes != 0 && header_bytes < max_header_bytes)
+ {
+ ip_main_t *im = &ip_main;
+ tcp_udp_port_info_t *pi;
+
+ pi = ip_get_tcp_udp_port_info (im, tcp->dst);
+
+ if (pi && pi->format_header)
+ s = format (s, "\n%U%U", format_white_space, indent - 2,
+ pi->format_header,
+ /* next protocol header */ (void *) tcp + header_bytes,
+ max_header_bytes - header_bytes);
+ }
+
+ return s;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vppinfra/sparse_vec.h>
+#include <vnet/tcp/tcp_packet.h>
+#include <vnet/tcp/tcp.h>
+#include <vnet/session/session.h>
+#include <math.h>
+
+static char *tcp_error_strings[] = {
+#define tcp_error(n,s) s,
+#include <vnet/tcp/tcp_error.def>
+#undef tcp_error
+};
+
+/* All TCP nodes have the same outgoing arcs */
+#define foreach_tcp_state_next \
+ _ (DROP, "error-drop") \
+ _ (TCP4_OUTPUT, "tcp4-output") \
+ _ (TCP6_OUTPUT, "tcp6-output")
+
+typedef enum _tcp_established_next
+{
+#define _(s,n) TCP_ESTABLISHED_NEXT_##s,
+ foreach_tcp_state_next
+#undef _
+ TCP_ESTABLISHED_N_NEXT,
+} tcp_established_next_t;
+
+typedef enum _tcp_rcv_process_next
+{
+#define _(s,n) TCP_RCV_PROCESS_NEXT_##s,
+ foreach_tcp_state_next
+#undef _
+ TCP_RCV_PROCESS_N_NEXT,
+} tcp_rcv_process_next_t;
+
+typedef enum _tcp_syn_sent_next
+{
+#define _(s,n) TCP_SYN_SENT_NEXT_##s,
+ foreach_tcp_state_next
+#undef _
+ TCP_SYN_SENT_N_NEXT,
+} tcp_syn_sent_next_t;
+
+typedef enum _tcp_listen_next
+{
+#define _(s,n) TCP_LISTEN_NEXT_##s,
+ foreach_tcp_state_next
+#undef _
+ TCP_LISTEN_N_NEXT,
+} tcp_listen_next_t;
+
+/* Generic, state independent indices */
+typedef enum _tcp_state_next
+{
+#define _(s,n) TCP_NEXT_##s,
+ foreach_tcp_state_next
+#undef _
+ TCP_STATE_N_NEXT,
+} tcp_state_next_t;
+
+#define tcp_next_output(is_ip4) (is_ip4 ? TCP_NEXT_TCP4_OUTPUT \
+ : TCP_NEXT_TCP6_OUTPUT)
+
+vlib_node_registration_t tcp4_established_node;
+vlib_node_registration_t tcp6_established_node;
+
+/**
+ * Validate segment sequence number. As per RFC793:
+ *
+ * Segment Receive Test
+ * Length Window
+ * ------- ------- -------------------------------------------
+ * 0 0 SEG.SEQ = RCV.NXT
+ * 0 >0 RCV.NXT =< SEG.SEQ < RCV.NXT+RCV.WND
+ * >0 0 not acceptable
+ * >0 >0 RCV.NXT =< SEG.SEQ < RCV.NXT+RCV.WND
+ * or RCV.NXT =< SEG.SEQ+SEG.LEN-1 < RCV.NXT+RCV.WND
+ *
+ * This ultimately consists in checking if segment falls within the window.
+ * The one important difference compared to RFC793 is that we use rcv_las,
+ * or the rcv_nxt at last ack sent instead of rcv_nxt since that's the
+ * peer's reference when computing our receive window.
+ *
+ * This accepts only segments within the window.
+ */
+always_inline u8
+tcp_segment_in_rcv_wnd (tcp_connection_t * tc, u32 seq, u32 end_seq)
+{
+ return seq_leq (end_seq, tc->rcv_las + tc->rcv_wnd)
+ && seq_geq (seq, tc->rcv_nxt);
+}
+
+void
+tcp_options_parse (tcp_header_t * th, tcp_options_t * to)
+{
+ const u8 *data;
+ u8 opt_len, opts_len, kind;
+ int j;
+ sack_block_t b;
+
+ opts_len = (tcp_doff (th) << 2) - sizeof (tcp_header_t);
+ data = (const u8 *) (th + 1);
+
+ /* Zero out all flags but those set in SYN */
+ to->flags &= (TCP_OPTS_FLAG_SACK_PERMITTED | TCP_OPTS_FLAG_WSCALE);
+
+ for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
+ {
+ kind = data[0];
+
+ /* Get options length */
+ if (kind == TCP_OPTION_EOL)
+ break;
+ else if (kind == TCP_OPTION_NOOP)
+ opt_len = 1;
+ else
+ {
+ /* broken options */
+ if (opts_len < 2)
+ break;
+ opt_len = data[1];
+
+ /* weird option length */
+ if (opt_len < 2 || opt_len > opts_len)
+ break;
+ }
+
+ /* Parse options */
+ switch (kind)
+ {
+ case TCP_OPTION_MSS:
+ if ((opt_len == TCP_OPTION_LEN_MSS) && tcp_syn (th))
+ {
+ to->flags |= TCP_OPTS_FLAG_MSS;
+ to->mss = clib_net_to_host_u16 (*(u16 *) (data + 2));
+ }
+ break;
+ case TCP_OPTION_WINDOW_SCALE:
+ if ((opt_len == TCP_OPTION_LEN_WINDOW_SCALE) && tcp_syn (th))
+ {
+ to->flags |= TCP_OPTS_FLAG_WSCALE;
+ to->wscale = data[2];
+ if (to->wscale > TCP_MAX_WND_SCALE)
+ {
+ clib_warning ("Illegal window scaling value: %d",
+ to->wscale);
+ to->wscale = TCP_MAX_WND_SCALE;
+ }
+ }
+ break;
+ case TCP_OPTION_TIMESTAMP:
+ if (opt_len == TCP_OPTION_LEN_TIMESTAMP)
+ {
+ to->flags |= TCP_OPTS_FLAG_TSTAMP;
+ to->tsval = clib_net_to_host_u32 (*(u32 *) (data + 2));
+ to->tsecr = clib_net_to_host_u32 (*(u32 *) (data + 6));
+ }
+ break;
+ case TCP_OPTION_SACK_PERMITTED:
+ if (opt_len == TCP_OPTION_LEN_SACK_PERMITTED && tcp_syn (th))
+ to->flags |= TCP_OPTS_FLAG_SACK_PERMITTED;
+ break;
+ case TCP_OPTION_SACK_BLOCK:
+ /* If SACK permitted was not advertised or a SYN, break */
+ if ((to->flags & TCP_OPTS_FLAG_SACK_PERMITTED) == 0 || tcp_syn (th))
+ break;
+
+ /* If too short or not correctly formatted, break */
+ if (opt_len < 10 || ((opt_len - 2) % TCP_OPTION_LEN_SACK_BLOCK))
+ break;
+
+ to->flags |= TCP_OPTS_FLAG_SACK;
+ to->n_sack_blocks = (opt_len - 2) / TCP_OPTION_LEN_SACK_BLOCK;
+ vec_reset_length (to->sacks);
+ for (j = 0; j < to->n_sack_blocks; j++)
+ {
+ b.start = clib_net_to_host_u32 (*(u32 *) (data + 2 + 4 * j));
+ b.end = clib_net_to_host_u32 (*(u32 *) (data + 6 + 4 * j));
+ vec_add1 (to->sacks, b);
+ }
+ break;
+ default:
+ /* Nothing to see here */
+ continue;
+ }
+ }
+}
+
+always_inline int
+tcp_segment_check_paws (tcp_connection_t * tc)
+{
+ /* XXX normally test for timestamp should be lt instead of leq, but for
+ * local testing this is not enough */
+ return tcp_opts_tstamp (&tc->opt) && tc->tsval_recent
+ && timestamp_lt (tc->opt.tsval, tc->tsval_recent);
+}
+
+/**
+ * Validate incoming segment as per RFC793 p. 69 and RFC1323 p. 19
+ *
+ * It first verifies if segment has a wrapped sequence number (PAWS) and then
+ * does the processing associated to the first four steps (ignoring security
+ * and precedence): sequence number, rst bit and syn bit checks.
+ *
+ * @return 0 if segments passes validation.
+ */
+static int
+tcp_segment_validate (vlib_main_t * vm, tcp_connection_t * tc0,
+ vlib_buffer_t * b0, tcp_header_t * th0, u32 * next0)
+{
+ u8 paws_failed;
+
+ if (PREDICT_FALSE (!tcp_ack (th0) && !tcp_rst (th0) && !tcp_syn (th0)))
+ return -1;
+
+ tcp_options_parse (th0, &tc0->opt);
+
+ /* RFC1323: Check against wrapped sequence numbers (PAWS). If we have
+ * timestamp to echo and it's less than tsval_recent, drop segment
+ * but still send an ACK in order to retain TCP's mechanism for detecting
+ * and recovering from half-open connections */
+ paws_failed = tcp_segment_check_paws (tc0);
+ if (paws_failed)
+ {
+ clib_warning ("paws failed");
+
+ /* If it just so happens that a segment updates tsval_recent for a
+ * segment over 24 days old, invalidate tsval_recent. */
+ if (timestamp_lt (tc0->tsval_recent_age + TCP_PAWS_IDLE,
+ tcp_time_now ()))
+ {
+ /* Age isn't reset until we get a valid tsval (bsd inspired) */
+ tc0->tsval_recent = 0;
+ }
+ else
+ {
+ /* Drop after ack if not rst */
+ if (!tcp_rst (th0))
+ {
+ tcp_make_ack (tc0, b0);
+ *next0 = tcp_next_output (tc0->c_is_ip4);
+ return -1;
+ }
+ }
+ }
+
+ /* 1st: check sequence number */
+ if (!tcp_segment_in_rcv_wnd (tc0, vnet_buffer (b0)->tcp.seq_number,
+ vnet_buffer (b0)->tcp.seq_end))
+ {
+ if (!tcp_rst (th0))
+ {
+ /* Send dup ack */
+ tcp_make_ack (tc0, b0);
+ *next0 = tcp_next_output (tc0->c_is_ip4);
+ }
+ return -1;
+ }
+
+ /* 2nd: check the RST bit */
+ if (tcp_rst (th0))
+ {
+ /* Notify session that connection has been reset. Switch
+ * state to closed and await for session to do the cleanup. */
+ stream_session_reset_notify (&tc0->connection);
+ tc0->state = TCP_STATE_CLOSED;
+ return -1;
+ }
+
+ /* 3rd: check security and precedence (skip) */
+
+ /* 4th: check the SYN bit */
+ if (tcp_syn (th0))
+ {
+ tcp_send_reset (b0, tc0->c_is_ip4);
+ return -1;
+ }
+
+ /* If PAWS passed and segment in window, save timestamp */
+ if (!paws_failed)
+ {
+ tc0->tsval_recent = tc0->opt.tsval;
+ tc0->tsval_recent_age = tcp_time_now ();
+ }
+
+ return 0;
+}
+
+always_inline int
+tcp_rcv_ack_is_acceptable (tcp_connection_t * tc0, vlib_buffer_t * tb0)
+{
+ /* SND.UNA =< SEG.ACK =< SND.NXT */
+ return (seq_leq (tc0->snd_una, vnet_buffer (tb0)->tcp.ack_number)
+ && seq_leq (vnet_buffer (tb0)->tcp.ack_number, tc0->snd_nxt));
+}
+
+/**
+ * Compute smoothed RTT as per VJ's '88 SIGCOMM and RFC6298
+ *
+ * Note that although the original article, srtt and rttvar are scaled
+ * to minimize round-off errors, here we don't. Instead, we rely on
+ * better precision time measurements.
+ *
+ * TODO support us rtt resolution
+ */
+static void
+tcp_estimate_rtt (tcp_connection_t * tc, u32 mrtt)
+{
+ int err;
+
+ if (tc->srtt != 0)
+ {
+ err = mrtt - tc->srtt;
+ tc->srtt += err >> 3;
+
+ /* XXX Drop in RTT results in RTTVAR increase and bigger RTO.
+ * The increase should be bound */
+ tc->rttvar += (clib_abs (err) - tc->rttvar) >> 2;
+ }
+ else
+ {
+ /* First measurement. */
+ tc->srtt = mrtt;
+ tc->rttvar = mrtt << 1;
+ }
+}
+
+/** Update RTT estimate and RTO timer
+ *
+ * Measure RTT: We have two sources of RTT measurements: TSOPT and ACK
+ * timing. Middle boxes are known to fiddle with TCP options so we
+ * should give higher priority to ACK timing.
+ *
+ * return 1 if valid rtt 0 otherwise
+ */
+static int
+tcp_update_rtt (tcp_connection_t * tc, u32 ack)
+{
+ u32 mrtt = 0;
+
+ /* Karn's rule, part 1. Don't use retransmitted segments to estimate
+ * RTT because they're ambiguous. */
+ if (tc->rtt_seq && seq_gt (ack, tc->rtt_seq) && !tc->rto_boff)
+ {
+ mrtt = tcp_time_now () - tc->rtt_ts;
+ tc->rtt_seq = 0;
+ }
+
+ /* As per RFC7323 TSecr can be used for RTTM only if the segment advances
+ * snd_una, i.e., the left side of the send window:
+ * seq_lt (tc->snd_una, ack). Note: last condition could be dropped, we don't
+ * try to update rtt for dupacks */
+ else if (tcp_opts_tstamp (&tc->opt) && tc->opt.tsecr && tc->bytes_acked)
+ {
+ mrtt = tcp_time_now () - tc->opt.tsecr;
+ }
+
+ /* Ignore dubious measurements */
+ if (mrtt == 0 || mrtt > TCP_RTT_MAX)
+ return 0;
+
+ tcp_estimate_rtt (tc, mrtt);
+
+ tc->rto = clib_min (tc->srtt + (tc->rttvar << 2), TCP_RTO_MAX);
+
+ return 1;
+}
+
+/**
+ * Dequeue bytes that have been acked and while at it update RTT estimates.
+ */
+static void
+tcp_dequeue_acked (tcp_connection_t * tc, u32 ack)
+{
+ /* Dequeue the newly ACKed bytes */
+ stream_session_dequeue_drop (&tc->connection, tc->bytes_acked);
+
+ /* Update rtt and rto */
+ if (tcp_update_rtt (tc, ack))
+ {
+ /* Good ACK received and valid RTT, make sure retransmit backoff is 0 */
+ tc->rto_boff = 0;
+ }
+}
+
+/** Check if dupack as per RFC5681 Sec. 2 */
+always_inline u8
+tcp_ack_is_dupack (tcp_connection_t * tc, vlib_buffer_t * b, u32 new_snd_wnd)
+{
+ return ((vnet_buffer (b)->tcp.ack_number == tc->snd_una)
+ && seq_gt (tc->snd_una_max, tc->snd_una)
+ && (vnet_buffer (b)->tcp.seq_end == vnet_buffer (b)->tcp.seq_number)
+ && (new_snd_wnd == tc->snd_wnd));
+}
+
+void
+scoreboard_remove_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * hole)
+{
+ sack_scoreboard_hole_t *next, *prev;
+
+ if (hole->next != TCP_INVALID_SACK_HOLE_INDEX)
+ {
+ next = pool_elt_at_index (sb->holes, hole->next);
+ next->prev = hole->prev;
+ }
+
+ if (hole->prev != TCP_INVALID_SACK_HOLE_INDEX)
+ {
+ prev = pool_elt_at_index (sb->holes, hole->prev);
+ prev->next = hole->next;
+ }
+ else
+ {
+ sb->head = hole->next;
+ }
+
+ pool_put (sb->holes, hole);
+}
+
+sack_scoreboard_hole_t *
+scoreboard_insert_hole (sack_scoreboard_t * sb, sack_scoreboard_hole_t * prev,
+ u32 start, u32 end)
+{
+ sack_scoreboard_hole_t *hole, *next;
+ u32 hole_index;
+
+ pool_get (sb->holes, hole);
+ memset (hole, 0, sizeof (*hole));
+
+ hole->start = start;
+ hole->end = end;
+ hole_index = hole - sb->holes;
+
+ if (prev)
+ {
+ hole->prev = prev - sb->holes;
+ hole->next = prev->next;
+
+ if ((next = scoreboard_next_hole (sb, hole)))
+ next->prev = hole_index;
+
+ prev->next = hole_index;
+ }
+ else
+ {
+ sb->head = hole_index;
+ hole->prev = TCP_INVALID_SACK_HOLE_INDEX;
+ hole->next = TCP_INVALID_SACK_HOLE_INDEX;
+ }
+
+ return hole;
+}
+
+static void
+tcp_rcv_sacks (tcp_connection_t * tc, u32 ack)
+{
+ sack_scoreboard_t *sb = &tc->sack_sb;
+ sack_block_t *blk, tmp;
+ sack_scoreboard_hole_t *hole, *next_hole;
+ u32 blk_index = 0;
+ int i, j;
+
+ if (!tcp_opts_sack (tc) && sb->head == TCP_INVALID_SACK_HOLE_INDEX)
+ return;
+
+ /* Remove invalid blocks */
+ vec_foreach (blk, tc->opt.sacks)
+ {
+ if (seq_lt (blk->start, blk->end)
+ && seq_gt (blk->start, tc->snd_una)
+ && seq_gt (blk->start, ack) && seq_lt (blk->end, tc->snd_nxt))
+ continue;
+
+ vec_del1 (tc->opt.sacks, blk - tc->opt.sacks);
+ }
+
+ /* Add block for cumulative ack */
+ if (seq_gt (ack, tc->snd_una))
+ {
+ tmp.start = tc->snd_una;
+ tmp.end = ack;
+ vec_add1 (tc->opt.sacks, tmp);
+ }
+
+ if (vec_len (tc->opt.sacks) == 0)
+ return;
+
+ /* Make sure blocks are ordered */
+ for (i = 0; i < vec_len (tc->opt.sacks); i++)
+ for (j = i; j < vec_len (tc->opt.sacks); j++)
+ if (seq_lt (tc->opt.sacks[j].start, tc->opt.sacks[i].start))
+ {
+ tmp = tc->opt.sacks[i];
+ tc->opt.sacks[i] = tc->opt.sacks[j];
+ tc->opt.sacks[j] = tmp;
+ }
+
+ /* If no holes, insert the first that covers all outstanding bytes */
+ if (sb->head == TCP_INVALID_SACK_HOLE_INDEX)
+ {
+ scoreboard_insert_hole (sb, 0, tc->snd_una, tc->snd_una_max);
+ }
+
+ /* Walk the holes with the SACK blocks */
+ hole = pool_elt_at_index (sb->holes, sb->head);
+ while (hole && blk_index < vec_len (tc->opt.sacks))
+ {
+ blk = &tc->opt.sacks[blk_index];
+
+ if (seq_leq (blk->start, hole->start))
+ {
+ /* Block covers hole. Remove hole */
+ if (seq_geq (blk->end, hole->end))
+ {
+ next_hole = scoreboard_next_hole (sb, hole);
+
+ /* Byte accounting */
+ if (seq_lt (hole->end, ack))
+ {
+ /* Bytes lost because snd wnd left edge advances */
+ if (seq_lt (next_hole->start, ack))
+ sb->sacked_bytes -= next_hole->start - hole->end;
+ else
+ sb->sacked_bytes -= ack - hole->end;
+ }
+ else
+ {
+ sb->sacked_bytes += scoreboard_hole_bytes (hole);
+ }
+
+ scoreboard_remove_hole (sb, hole);
+ hole = next_hole;
+ }
+ /* Partial overlap */
+ else
+ {
+ sb->sacked_bytes += blk->end - hole->start;
+ hole->start = blk->end;
+ blk_index++;
+ }
+ }
+ else
+ {
+ /* Hole must be split */
+ if (seq_leq (blk->end, hole->end))
+ {
+ sb->sacked_bytes += blk->end - blk->start;
+ scoreboard_insert_hole (sb, hole, blk->end, hole->end);
+ hole->end = blk->start - 1;
+ blk_index++;
+ }
+ else
+ {
+ sb->sacked_bytes += hole->end - blk->start + 1;
+ hole->end = blk->start - 1;
+ hole = scoreboard_next_hole (sb, hole);
+ }
+ }
+ }
+}
+
+/** Update snd_wnd
+ *
+ * If (SND.WL1 < SEG.SEQ or (SND.WL1 = SEG.SEQ and SND.WL2 =< SEG.ACK)), set
+ * SND.WND <- SEG.WND, set SND.WL1 <- SEG.SEQ, and set SND.WL2 <- SEG.ACK */
+static void
+tcp_update_snd_wnd (tcp_connection_t * tc, u32 seq, u32 ack, u32 snd_wnd)
+{
+ if (tc->snd_wl1 < seq || (tc->snd_wl1 == seq && tc->snd_wl2 <= ack))
+ {
+ tc->snd_wnd = snd_wnd;
+ tc->snd_wl1 = seq;
+ tc->snd_wl2 = ack;
+ }
+}
+
+static void
+tcp_cc_congestion (tcp_connection_t * tc)
+{
+ tc->cc_algo->congestion (tc);
+}
+
+static void
+tcp_cc_recover (tcp_connection_t * tc)
+{
+ if (tcp_in_fastrecovery (tc))
+ {
+ tc->cc_algo->recovered (tc);
+ tcp_recovery_off (tc);
+ }
+ else if (tcp_in_recovery (tc))
+ {
+ tcp_recovery_off (tc);
+ tc->cwnd = tcp_loss_wnd (tc);
+ }
+}
+
+static void
+tcp_cc_rcv_ack (tcp_connection_t * tc)
+{
+ u8 partial_ack;
+
+ if (tcp_in_recovery (tc))
+ {
+ partial_ack = seq_lt (tc->snd_una, tc->snd_una_max);
+ if (!partial_ack)
+ {
+ /* Clear retransmitted bytes. */
+ tc->rtx_bytes = 0;
+ tcp_cc_recover (tc);
+ }
+ else
+ {
+ /* Clear retransmitted bytes. XXX should we clear all? */
+ tc->rtx_bytes = 0;
+ tc->cc_algo->rcv_cong_ack (tc, TCP_CC_PARTIALACK);
+
+ /* Retransmit first unacked segment */
+ tcp_retransmit_first_unacked (tc);
+ }
+ }
+ else
+ {
+ tc->cc_algo->rcv_ack (tc);
+ }
+
+ tc->rcv_dupacks = 0;
+ tc->tsecr_last_ack = tc->opt.tsecr;
+}
+
+static void
+tcp_cc_rcv_dupack (tcp_connection_t * tc, u32 ack)
+{
+ ASSERT (tc->snd_una == ack);
+
+ tc->rcv_dupacks++;
+ if (tc->rcv_dupacks == TCP_DUPACK_THRESHOLD)
+ {
+ /* RFC6582 NewReno heuristic to avoid multiple fast retransmits */
+ if (tc->opt.tsecr != tc->tsecr_last_ack)
+ {
+ tc->rcv_dupacks = 0;
+ return;
+ }
+
+ tcp_fastrecovery_on (tc);
+
+ /* Handle congestion and dupack */
+ tcp_cc_congestion (tc);
+ tc->cc_algo->rcv_cong_ack (tc, TCP_CC_DUPACK);
+
+ tcp_fast_retransmit (tc);
+
+ /* Post retransmit update cwnd to ssthresh and account for the
+ * three segments that have left the network and should've been
+ * buffered at the receiver */
+ tc->cwnd = tc->ssthresh + TCP_DUPACK_THRESHOLD * tc->snd_mss;
+ }
+ else if (tc->rcv_dupacks > TCP_DUPACK_THRESHOLD)
+ {
+ ASSERT (tcp_in_fastrecovery (tc));
+
+ tc->cc_algo->rcv_cong_ack (tc, TCP_CC_DUPACK);
+ }
+}
+
+void
+tcp_cc_init (tcp_connection_t * tc)
+{
+ tc->cc_algo = tcp_cc_algo_get (TCP_CC_NEWRENO);
+ tc->cc_algo->init (tc);
+}
+
+static int
+tcp_rcv_ack (tcp_connection_t * tc, vlib_buffer_t * b,
+ tcp_header_t * th, u32 * next, u32 * error)
+{
+ u32 new_snd_wnd;
+
+ /* If the ACK acks something not yet sent (SEG.ACK > SND.NXT) then send an
+ * ACK, drop the segment, and return */
+ if (seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt))
+ {
+ tcp_make_ack (tc, b);
+ *next = tcp_next_output (tc->c_is_ip4);
+ *error = TCP_ERROR_ACK_INVALID;
+ return -1;
+ }
+
+ /* If old ACK, discard */
+ if (seq_lt (vnet_buffer (b)->tcp.ack_number, tc->snd_una))
+ {
+ *error = TCP_ERROR_ACK_OLD;
+ return -1;
+ }
+
+ if (tcp_opts_sack_permitted (&tc->opt))
+ tcp_rcv_sacks (tc, vnet_buffer (b)->tcp.ack_number);
+
+ new_snd_wnd = clib_net_to_host_u32 (th->window) << tc->snd_wscale;
+
+ if (tcp_ack_is_dupack (tc, b, new_snd_wnd))
+ {
+ tcp_cc_rcv_dupack (tc, vnet_buffer (b)->tcp.ack_number);
+ *error = TCP_ERROR_ACK_DUP;
+ return -1;
+ }
+
+ /* Valid ACK */
+ tc->bytes_acked = vnet_buffer (b)->tcp.ack_number - tc->snd_una;
+ tc->snd_una = vnet_buffer (b)->tcp.ack_number;
+
+ /* Dequeue ACKed packet and update RTT */
+ tcp_dequeue_acked (tc, vnet_buffer (b)->tcp.ack_number);
+
+ tcp_update_snd_wnd (tc, vnet_buffer (b)->tcp.seq_number,
+ vnet_buffer (b)->tcp.ack_number, new_snd_wnd);
+
+ /* Updates congestion control (slow start/congestion avoidance) */
+ tcp_cc_rcv_ack (tc);
+
+ /* If everything has been acked, stop retransmit timer
+ * otherwise update */
+ if (tc->snd_una == tc->snd_una_max)
+ tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT);
+ else
+ tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, tc->rto);
+
+ return 0;
+}
+
+/**
+ * Build SACK list as per RFC2018.
+ *
+ * Makes sure the first block contains the segment that generated the current
+ * ACK and the following ones are the ones most recently reported in SACK
+ * blocks.
+ *
+ * @param tc TCP connection for which the SACK list is updated
+ * @param start Start sequence number of the newest SACK block
+ * @param end End sequence of the newest SACK block
+ */
+static void
+tcp_update_sack_list (tcp_connection_t * tc, u32 start, u32 end)
+{
+ sack_block_t *new_list = 0, block;
+ u32 n_elts;
+ int i;
+ u8 new_head = 0;
+
+ /* If the first segment is ooo add it to the list. Last write might've moved
+ * rcv_nxt over the first segment. */
+ if (seq_lt (tc->rcv_nxt, start))
+ {
+ block.start = start;
+ block.end = end;
+ vec_add1 (new_list, block);
+ new_head = 1;
+ }
+
+ /* Find the blocks still worth keeping. */
+ for (i = 0; i < vec_len (tc->snd_sacks); i++)
+ {
+ /* Discard if:
+ * 1) rcv_nxt advanced beyond current block OR
+ * 2) Segment overlapped by the first segment, i.e., it has been merged
+ * into it.*/
+ if (seq_leq (tc->snd_sacks[i].start, tc->rcv_nxt)
+ || seq_leq (tc->snd_sacks[i].start, end))
+ continue;
+
+ /* Save subsequent segments to new SACK list. */
+ n_elts = clib_min (vec_len (tc->snd_sacks) - i,
+ TCP_MAX_SACK_BLOCKS - new_head);
+ vec_insert_elts (new_list, &tc->snd_sacks[i], n_elts, new_head);
+ break;
+ }
+
+ /* Replace old vector with new one */
+ vec_free (tc->snd_sacks);
+ tc->snd_sacks = new_list;
+}
+
+/** Enqueue data for delivery to application */
+always_inline u32
+tcp_session_enqueue_data (tcp_connection_t * tc, vlib_buffer_t * b,
+ u16 data_len)
+{
+ int written;
+
+ /* Pure ACK. Update rcv_nxt and be done. */
+ if (PREDICT_FALSE (data_len == 0))
+ {
+ tc->rcv_nxt = vnet_buffer (b)->tcp.seq_end;
+ return TCP_ERROR_PURE_ACK;
+ }
+
+ written = stream_session_enqueue_data (&tc->connection,
+ vlib_buffer_get_current (b),
+ data_len, 1 /* queue event */ );
+
+ /* Update rcv_nxt */
+ if (PREDICT_TRUE (written == data_len))
+ {
+ tc->rcv_nxt = vnet_buffer (b)->tcp.seq_end;
+ }
+ /* If more data written than expected, account for out-of-order bytes. */
+ else if (written > data_len)
+ {
+ tc->rcv_nxt = vnet_buffer (b)->tcp.seq_end + written - data_len;
+
+ /* Send ACK confirming the update */
+ tc->flags |= TCP_CONN_SNDACK;
+
+ /* Update SACK list if need be */
+ if (tcp_opts_sack_permitted (&tc->opt))
+ {
+ /* Remove SACK blocks that have been delivered */
+ tcp_update_sack_list (tc, tc->rcv_nxt, tc->rcv_nxt);
+ }
+ }
+ else
+ {
+ ASSERT (0);
+ return TCP_ERROR_FIFO_FULL;
+ }
+
+ return TCP_ERROR_ENQUEUED;
+}
+
+/** Enqueue out-of-order data */
+always_inline u32
+tcp_session_enqueue_ooo (tcp_connection_t * tc, vlib_buffer_t * b,
+ u16 data_len)
+{
+ stream_session_t *s0;
+ u32 offset, seq;
+
+ s0 = stream_session_get (tc->c_s_index, tc->c_thread_index);
+ seq = vnet_buffer (b)->tcp.seq_number;
+ offset = seq - tc->rcv_nxt;
+
+ if (svm_fifo_enqueue_with_offset (s0->server_rx_fifo, s0->pid, offset,
+ data_len, vlib_buffer_get_current (b)))
+ return TCP_ERROR_FIFO_FULL;
+
+ /* Update SACK list if in use */
+ if (tcp_opts_sack_permitted (&tc->opt))
+ {
+ ooo_segment_t *newest;
+ u32 start, end;
+
+ /* Get the newest segment from the fifo */
+ newest = svm_fifo_newest_ooo_segment (s0->server_rx_fifo);
+ start = tc->rcv_nxt + ooo_segment_offset (s0->server_rx_fifo, newest);
+ end = tc->rcv_nxt + ooo_segment_end_offset (s0->server_rx_fifo, newest);
+
+ tcp_update_sack_list (tc, start, end);
+ }
+
+ return TCP_ERROR_ENQUEUED;
+}
+
+/**
+ * Check if ACK could be delayed. DELACK timer is set only after frame is
+ * processed so this can return true for a full bursts of packets.
+ */
+always_inline int
+tcp_can_delack (tcp_connection_t * tc)
+{
+ /* If there's no DELACK timer set and the last window sent wasn't 0 we
+ * can safely delay. */
+ if (!tcp_timer_is_active (tc, TCP_TIMER_DELACK)
+ && (tc->flags & TCP_CONN_SENT_RCV_WND0) == 0
+ && (tc->flags & TCP_CONN_SNDACK) == 0)
+ return 1;
+
+ return 0;
+}
+
+static int
+tcp_segment_rcv (tcp_main_t * tm, tcp_connection_t * tc, vlib_buffer_t * b,
+ u16 n_data_bytes, u32 * next0)
+{
+ u32 error = 0;
+
+ /* Handle out-of-order data */
+ if (PREDICT_FALSE (vnet_buffer (b)->tcp.seq_number != tc->rcv_nxt))
+ {
+ error = tcp_session_enqueue_ooo (tc, b, n_data_bytes);
+
+ /* Don't send more than 3 dupacks per burst
+ * XXX decide if this is good */
+ if (tc->snt_dupacks < 3)
+ {
+ /* RFC2581: Send DUPACK for fast retransmit */
+ tcp_make_ack (tc, b);
+ *next0 = tcp_next_output (tc->c_is_ip4);
+
+ /* Mark as DUPACK. We may filter these in output if
+ * the burst fills the holes. */
+ vnet_buffer (b)->tcp.flags = TCP_BUF_FLAG_DUPACK;
+
+ tc->snt_dupacks++;
+ }
+
+ goto done;
+ }
+
+ /* In order data, enqueue. Fifo figures out by itself if any out-of-order
+ * segments can be enqueued after fifo tail offset changes. */
+ error = tcp_session_enqueue_data (tc, b, n_data_bytes);
+
+ /* Check if ACK can be delayed */
+ if (tcp_can_delack (tc))
+ {
+ /* Nothing to do for pure ACKs */
+ if (n_data_bytes == 0)
+ goto done;
+
+ /* If connection has not been previously marked for delay ack
+ * add it to the list and flag it */
+ if (!tc->flags & TCP_CONN_DELACK)
+ {
+ vec_add1 (tm->delack_connections[tc->c_thread_index],
+ tc->c_c_index);
+ tc->flags |= TCP_CONN_DELACK;
+ }
+ }
+ else
+ {
+ /* Check if a packet has already been enqueued to output for burst.
+ * If yes, then drop this one, otherwise, let it pass through to
+ * output */
+ if ((tc->flags & TCP_CONN_BURSTACK) == 0)
+ {
+ *next0 = tcp_next_output (tc->c_is_ip4);
+ tcp_make_ack (tc, b);
+ error = TCP_ERROR_ENQUEUED;
+
+ /* TODO: maybe add counter to ensure N acks will be sent/burst */
+ tc->flags |= TCP_CONN_BURSTACK;
+ }
+ }
+
+done:
+ return error;
+}
+
+void
+delack_timers_init (tcp_main_t * tm, u32 thread_index)
+{
+ tcp_connection_t *tc;
+ u32 i, *conns;
+ tw_timer_wheel_16t_2w_512sl_t *tw;
+
+ tw = &tm->timer_wheels[thread_index];
+ conns = tm->delack_connections[thread_index];
+ for (i = 0; i < vec_len (conns); i++)
+ {
+ tc = pool_elt_at_index (tm->connections[thread_index], conns[i]);
+ ASSERT (0 != tc);
+
+ tc->timers[TCP_TIMER_DELACK]
+ = tw_timer_start_16t_2w_512sl (tw, conns[i],
+ TCP_TIMER_DELACK, TCP_DELACK_TIME);
+ }
+ vec_reset_length (tm->delack_connections[thread_index]);
+}
+
+always_inline uword
+tcp46_established_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, int is_ip4)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ u32 my_thread_index = vm->cpu_index, errors = 0;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ tcp_header_t *th0 = 0;
+ tcp_connection_t *tc0;
+ ip4_header_t *ip40;
+ ip6_header_t *ip60;
+ u32 n_advance_bytes0, n_data_bytes0;
+ u32 next0 = TCP_ESTABLISHED_NEXT_DROP, error0 = TCP_ERROR_ENQUEUED;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ tc0 = tcp_connection_get (vnet_buffer (b0)->tcp.connection_index,
+ my_thread_index);
+
+ /* Checksum computed by ipx_local no need to compute again */
+
+ if (is_ip4)
+ {
+ ip40 = vlib_buffer_get_current (b0);
+ th0 = ip4_next_header (ip40);
+ n_advance_bytes0 = (ip4_header_bytes (ip40)
+ + tcp_header_bytes (th0));
+ n_data_bytes0 = clib_net_to_host_u16 (ip40->length)
+ - n_advance_bytes0;
+ }
+ else
+ {
+ ip60 = vlib_buffer_get_current (b0);
+ th0 = ip6_next_header (ip60);
+ n_advance_bytes0 = tcp_header_bytes (th0);
+ n_data_bytes0 = clib_net_to_host_u16 (ip60->payload_length)
+ - n_advance_bytes0;
+ n_advance_bytes0 += sizeof (ip60[0]);
+ }
+
+ /* SYNs, FINs and data consume sequence numbers */
+ vnet_buffer (b0)->tcp.seq_end = vnet_buffer (b0)->tcp.seq_number
+ + tcp_is_syn (th0) + tcp_is_fin (th0) + n_data_bytes0;
+
+ /* TODO header prediction fast path */
+
+ /* 1-4: check SEQ, RST, SYN */
+ if (PREDICT_FALSE (tcp_segment_validate (vm, tc0, b0, th0, &next0)))
+ {
+ error0 = TCP_ERROR_SEGMENT_INVALID;
+ goto drop;
+ }
+
+ /* 5: check the ACK field */
+ if (tcp_rcv_ack (tc0, b0, th0, &next0, &error0))
+ {
+ goto drop;
+ }
+
+ /* 6: check the URG bit TODO */
+
+ /* 7: process the segment text */
+ vlib_buffer_advance (b0, n_advance_bytes0);
+ error0 = tcp_segment_rcv (tm, tc0, b0, n_data_bytes0, &next0);
+
+ /* 8: check the FIN bit */
+ if (tcp_fin (th0))
+ {
+ /* Send ACK and enter CLOSE-WAIT */
+ tcp_make_ack (tc0, b0);
+ tcp_connection_force_ack (tc0, b0);
+ next0 = tcp_next_output (tc0->c_is_ip4);
+ tc0->state = TCP_STATE_CLOSE_WAIT;
+ stream_session_disconnect_notify (&tc0->connection);
+ }
+
+ drop:
+ b0->error = node->errors[error0];
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ errors = session_manager_flush_enqueue_events (my_thread_index);
+ if (errors)
+ {
+ if (is_ip4)
+ vlib_node_increment_counter (vm, tcp4_established_node.index,
+ TCP_ERROR_EVENT_FIFO_FULL, errors);
+ else
+ vlib_node_increment_counter (vm, tcp6_established_node.index,
+ TCP_ERROR_EVENT_FIFO_FULL, errors);
+ }
+
+ delack_timers_init (tm, my_thread_index);
+
+ return from_frame->n_vectors;
+}
+
+static uword
+tcp4_established (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_established_inline (vm, node, from_frame, 1 /* is_ip4 */ );
+}
+
+static uword
+tcp6_established (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_established_inline (vm, node, from_frame, 0 /* is_ip4 */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp4_established_node) =
+{
+ .function = tcp4_established,
+ .name = "tcp4-established",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,.error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_ESTABLISHED_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_ESTABLISHED_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp4_established_node, tcp4_established);
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp6_established_node) =
+{
+ .function = tcp6_established,
+ .name = "tcp6-established",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_ESTABLISHED_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_ESTABLISHED_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp6_established_node, tcp6_established);
+
+vlib_node_registration_t tcp4_syn_sent_node;
+vlib_node_registration_t tcp6_syn_sent_node;
+
+always_inline uword
+tcp46_syn_sent_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, int is_ip4)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ u32 n_left_from, next_index, *from, *to_next;
+ u32 my_thread_index = vm->cpu_index, errors = 0;
+ u8 sst = is_ip4 ? SESSION_TYPE_IP4_TCP : SESSION_TYPE_IP6_TCP;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, ack0, seq0;
+ vlib_buffer_t *b0;
+ tcp_header_t *tcp0 = 0;
+ tcp_connection_t *tc0;
+ ip4_header_t *ip40;
+ ip6_header_t *ip60;
+ u32 n_advance_bytes0, n_data_bytes0;
+ tcp_connection_t *new_tc0;
+ u32 next0 = TCP_SYN_SENT_NEXT_DROP, error0 = TCP_ERROR_ENQUEUED;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ tc0 =
+ tcp_half_open_connection_get (vnet_buffer (b0)->
+ tcp.connection_index);
+
+ ack0 = vnet_buffer (b0)->tcp.ack_number;
+ seq0 = vnet_buffer (b0)->tcp.seq_number;
+
+ /* Checksum computed by ipx_local no need to compute again */
+
+ if (is_ip4)
+ {
+ ip40 = vlib_buffer_get_current (b0);
+ tcp0 = ip4_next_header (ip40);
+ n_advance_bytes0 = (ip4_header_bytes (ip40)
+ + tcp_header_bytes (tcp0));
+ n_data_bytes0 = clib_net_to_host_u16 (ip40->length)
+ - n_advance_bytes0;
+ }
+ else
+ {
+ ip60 = vlib_buffer_get_current (b0);
+ tcp0 = ip6_next_header (ip60);
+ n_advance_bytes0 = tcp_header_bytes (tcp0);
+ n_data_bytes0 = clib_net_to_host_u16 (ip60->payload_length)
+ - n_advance_bytes0;
+ n_advance_bytes0 += sizeof (ip60[0]);
+ }
+
+ if (PREDICT_FALSE
+ (!tcp_ack (tcp0) && !tcp_rst (tcp0) && !tcp_syn (tcp0)))
+ goto drop;
+
+ /* SYNs, FINs and data consume sequence numbers */
+ vnet_buffer (b0)->tcp.seq_end = seq0 + tcp_is_syn (tcp0)
+ + tcp_is_fin (tcp0) + n_data_bytes0;
+
+ /*
+ * 1. check the ACK bit
+ */
+
+ /*
+ * If the ACK bit is set
+ * If SEG.ACK =< ISS, or SEG.ACK > SND.NXT, send a reset (unless
+ * the RST bit is set, if so drop the segment and return)
+ * <SEQ=SEG.ACK><CTL=RST>
+ * and discard the segment. Return.
+ * If SND.UNA =< SEG.ACK =< SND.NXT then the ACK is acceptable.
+ */
+ if (tcp_ack (tcp0))
+ {
+ if (ack0 <= tc0->iss || ack0 > tc0->snd_nxt)
+ {
+ if (!tcp_rst (tcp0))
+ tcp_send_reset (b0, is_ip4);
+
+ goto drop;
+ }
+
+ /* Make sure ACK is valid */
+ if (tc0->snd_una > ack0)
+ goto drop;
+ }
+
+ /*
+ * 2. check the RST bit
+ */
+
+ if (tcp_rst (tcp0))
+ {
+ /* If ACK is acceptable, signal client that peer is not
+ * willing to accept connection and drop connection*/
+ if (tcp_ack (tcp0))
+ {
+ stream_session_connect_notify (&tc0->connection, sst,
+ 1 /* fail */ );
+ tcp_connection_cleanup (tc0);
+ }
+ goto drop;
+ }
+
+ /*
+ * 3. check the security and precedence (skipped)
+ */
+
+ /*
+ * 4. check the SYN bit
+ */
+
+ /* No SYN flag. Drop. */
+ if (!tcp_syn (tcp0))
+ goto drop;
+
+ /* Stop connection establishment and retransmit timers */
+ tcp_timer_reset (tc0, TCP_TIMER_ESTABLISH);
+ tcp_timer_reset (tc0, TCP_TIMER_RETRANSMIT_SYN);
+
+ /* Valid SYN or SYN-ACK. Move connection from half-open pool to
+ * current thread pool. */
+ pool_get (tm->connections[my_thread_index], new_tc0);
+ clib_memcpy (new_tc0, tc0, sizeof (*new_tc0));
+
+ new_tc0->c_thread_index = my_thread_index;
+
+ /* Cleanup half-open connection XXX lock */
+ pool_put (tm->half_open_connections, tc0);
+
+ new_tc0->rcv_nxt = vnet_buffer (b0)->tcp.seq_end;
+ new_tc0->irs = seq0;
+
+ /* Parse options */
+ tcp_options_parse (tcp0, &new_tc0->opt);
+ tcp_connection_init_vars (new_tc0);
+
+ if (tcp_opts_tstamp (&new_tc0->opt))
+ {
+ new_tc0->tsval_recent = new_tc0->opt.tsval;
+ new_tc0->tsval_recent_age = tcp_time_now ();
+ }
+
+ if (tcp_opts_wscale (&new_tc0->opt))
+ new_tc0->snd_wscale = new_tc0->opt.wscale;
+
+ new_tc0->snd_wnd = clib_net_to_host_u32 (tcp0->window)
+ << new_tc0->snd_wscale;
+ new_tc0->snd_wl1 = seq0;
+ new_tc0->snd_wl2 = ack0;
+
+ /* SYN-ACK: See if we can switch to ESTABLISHED state */
+ if (tcp_ack (tcp0))
+ {
+ /* Our SYN is ACKed: we have iss < ack = snd_una */
+
+ /* TODO Dequeue acknowledged segments if we support Fast Open */
+ new_tc0->snd_una = ack0;
+ new_tc0->state = TCP_STATE_ESTABLISHED;
+
+ /* Notify app that we have connection */
+ stream_session_connect_notify (&new_tc0->connection, sst, 0);
+
+ /* Make sure after data segment processing ACK is sent */
+ new_tc0->flags |= TCP_CONN_SNDACK;
+ }
+ /* SYN: Simultaneous open. Change state to SYN-RCVD and send SYN-ACK */
+ else
+ {
+ new_tc0->state = TCP_STATE_SYN_RCVD;
+
+ /* Notify app that we have connection XXX */
+ stream_session_connect_notify (&new_tc0->connection, sst, 0);
+
+ tcp_make_synack (new_tc0, b0);
+ next0 = tcp_next_output (is_ip4);
+
+ goto drop;
+ }
+
+ /* Read data, if any */
+ if (n_data_bytes0)
+ {
+ error0 =
+ tcp_segment_rcv (tm, new_tc0, b0, n_data_bytes0, &next0);
+ if (error0 == TCP_ERROR_PURE_ACK)
+ error0 = TCP_ERROR_SYN_ACKS_RCVD;
+ }
+ else
+ {
+ tcp_make_ack (new_tc0, b0);
+ next0 = tcp_next_output (new_tc0->c_is_ip4);
+ }
+
+ drop:
+
+ b0->error = error0 ? node->errors[error0] : 0;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ errors = session_manager_flush_enqueue_events (my_thread_index);
+ if (errors)
+ {
+ if (is_ip4)
+ vlib_node_increment_counter (vm, tcp4_established_node.index,
+ TCP_ERROR_EVENT_FIFO_FULL, errors);
+ else
+ vlib_node_increment_counter (vm, tcp6_established_node.index,
+ TCP_ERROR_EVENT_FIFO_FULL, errors);
+ }
+
+ return from_frame->n_vectors;
+}
+
+static uword
+tcp4_syn_sent (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_syn_sent_inline (vm, node, from_frame, 1 /* is_ip4 */ );
+}
+
+static uword
+tcp6_syn_sent_rcv (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_syn_sent_inline (vm, node, from_frame, 0 /* is_ip4 */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp4_syn_sent_node) =
+{
+ .function = tcp4_syn_sent,
+ .name = "tcp4-syn-sent",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_SYN_SENT_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_SYN_SENT_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp4_syn_sent_node, tcp4_syn_sent);
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp6_syn_sent_node) =
+{
+ .function = tcp6_syn_sent_rcv,
+ .name = "tcp6-syn-sent",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_SYN_SENT_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_SYN_SENT_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ }
+,};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp6_syn_sent_node, tcp6_syn_sent_rcv);
+/**
+ * Handles reception for all states except LISTEN, SYN-SEND and ESTABLISHED
+ * as per RFC793 p. 64
+ */
+always_inline uword
+tcp46_rcv_process_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, int is_ip4)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ u32 n_left_from, next_index, *from, *to_next;
+ u32 my_thread_index = vm->cpu_index, errors = 0;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ tcp_header_t *tcp0 = 0;
+ tcp_connection_t *tc0;
+ ip4_header_t *ip40;
+ ip6_header_t *ip60;
+ u32 n_advance_bytes0, n_data_bytes0;
+ u32 next0 = TCP_RCV_PROCESS_NEXT_DROP, error0 = TCP_ERROR_ENQUEUED;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ tc0 = tcp_connection_get (vnet_buffer (b0)->tcp.connection_index,
+ my_thread_index);
+
+ /* Checksum computed by ipx_local no need to compute again */
+
+ if (is_ip4)
+ {
+ ip40 = vlib_buffer_get_current (b0);
+ tcp0 = ip4_next_header (ip40);
+ n_advance_bytes0 = (ip4_header_bytes (ip40)
+ + tcp_header_bytes (tcp0));
+ n_data_bytes0 = clib_net_to_host_u16 (ip40->length)
+ - n_advance_bytes0;
+ }
+ else
+ {
+ ip60 = vlib_buffer_get_current (b0);
+ tcp0 = ip6_next_header (ip60);
+ n_advance_bytes0 = tcp_header_bytes (tcp0);
+ n_data_bytes0 = clib_net_to_host_u16 (ip60->payload_length)
+ - n_advance_bytes0;
+ n_advance_bytes0 += sizeof (ip60[0]);
+ }
+
+ /* SYNs, FINs and data consume sequence numbers */
+ vnet_buffer (b0)->tcp.seq_end = vnet_buffer (b0)->tcp.seq_number
+ + tcp_is_syn (tcp0) + tcp_is_fin (tcp0) + n_data_bytes0;
+
+ /*
+ * Special treatment for CLOSED
+ */
+ switch (tc0->state)
+ {
+ case TCP_STATE_CLOSED:
+ goto drop;
+ break;
+ }
+
+ /*
+ * For all other states (except LISTEN)
+ */
+
+ /* 1-4: check SEQ, RST, SYN */
+ if (PREDICT_FALSE
+ (tcp_segment_validate (vm, tc0, b0, tcp0, &next0)))
+ {
+ error0 = TCP_ERROR_SEGMENT_INVALID;
+ goto drop;
+ }
+
+ /* 5: check the ACK field */
+ switch (tc0->state)
+ {
+ case TCP_STATE_SYN_RCVD:
+ /*
+ * If the segment acknowledgment is not acceptable, form a
+ * reset segment,
+ * <SEQ=SEG.ACK><CTL=RST>
+ * and send it.
+ */
+ if (!tcp_rcv_ack_is_acceptable (tc0, b0))
+ {
+ tcp_send_reset (b0, is_ip4);
+ goto drop;
+ }
+ /* Switch state to ESTABLISHED */
+ tc0->state = TCP_STATE_ESTABLISHED;
+
+ /* Initialize session variables */
+ tc0->snd_una = vnet_buffer (b0)->tcp.ack_number;
+ tc0->snd_wnd = clib_net_to_host_u32 (tcp0->window)
+ << tc0->opt.wscale;
+ tc0->snd_wl1 = vnet_buffer (b0)->tcp.seq_number;
+ tc0->snd_wl2 = vnet_buffer (b0)->tcp.ack_number;
+
+ /* Shoulder tap the server */
+ stream_session_accept_notify (&tc0->connection);
+
+ tcp_timer_reset (tc0, TCP_TIMER_RETRANSMIT_SYN);
+ break;
+ case TCP_STATE_ESTABLISHED:
+ /* We can get packets in established state here because they
+ * were enqueued before state change */
+ if (tcp_rcv_ack (tc0, b0, tcp0, &next0, &error0))
+ goto drop;
+
+ break;
+ case TCP_STATE_FIN_WAIT_1:
+ /* In addition to the processing for the ESTABLISHED state, if
+ * our FIN is now acknowledged then enter FIN-WAIT-2 and
+ * continue processing in that state. */
+ if (tcp_rcv_ack (tc0, b0, tcp0, &next0, &error0))
+ goto drop;
+ tc0->state = TCP_STATE_FIN_WAIT_2;
+ /* Stop all timers, 2MSL will be set lower */
+ tcp_connection_timers_reset (tc0);
+ break;
+ case TCP_STATE_FIN_WAIT_2:
+ /* In addition to the processing for the ESTABLISHED state, if
+ * the retransmission queue is empty, the user's CLOSE can be
+ * acknowledged ("ok") but do not delete the TCB. */
+ if (tcp_rcv_ack (tc0, b0, tcp0, &next0, &error0))
+ goto drop;
+ /* check if rtx queue is empty and ack CLOSE TODO */
+ break;
+ case TCP_STATE_CLOSE_WAIT:
+ /* Do the same processing as for the ESTABLISHED state. */
+ if (tcp_rcv_ack (tc0, b0, tcp0, &next0, &error0))
+ goto drop;
+ break;
+ case TCP_STATE_CLOSING:
+ /* In addition to the processing for the ESTABLISHED state, if
+ * the ACK acknowledges our FIN then enter the TIME-WAIT state,
+ * otherwise ignore the segment. */
+ if (tcp_rcv_ack (tc0, b0, tcp0, &next0, &error0))
+ goto drop;
+
+ /* XXX test that send queue empty */
+ tc0->state = TCP_STATE_TIME_WAIT;
+ goto drop;
+
+ break;
+ case TCP_STATE_LAST_ACK:
+ /* The only thing that can arrive in this state is an
+ * acknowledgment of our FIN. If our FIN is now acknowledged,
+ * delete the TCB, enter the CLOSED state, and return. */
+
+ if (!tcp_rcv_ack_is_acceptable (tc0, b0))
+ goto drop;
+
+ tcp_connection_del (tc0);
+ goto drop;
+
+ break;
+ case TCP_STATE_TIME_WAIT:
+ /* The only thing that can arrive in this state is a
+ * retransmission of the remote FIN. Acknowledge it, and restart
+ * the 2 MSL timeout. */
+
+ /* TODO */
+ goto drop;
+ break;
+ default:
+ ASSERT (0);
+ }
+
+ /* 6: check the URG bit TODO */
+
+ /* 7: process the segment text */
+ switch (tc0->state)
+ {
+ case TCP_STATE_ESTABLISHED:
+ case TCP_STATE_FIN_WAIT_1:
+ case TCP_STATE_FIN_WAIT_2:
+ error0 = tcp_segment_rcv (tm, tc0, b0, n_data_bytes0, &next0);
+ break;
+ case TCP_STATE_CLOSE_WAIT:
+ case TCP_STATE_CLOSING:
+ case TCP_STATE_LAST_ACK:
+ case TCP_STATE_TIME_WAIT:
+ /* This should not occur, since a FIN has been received from the
+ * remote side. Ignore the segment text. */
+ break;
+ }
+
+ /* 8: check the FIN bit */
+ if (!tcp_fin (tcp0))
+ goto drop;
+
+ switch (tc0->state)
+ {
+ case TCP_STATE_ESTABLISHED:
+ case TCP_STATE_SYN_RCVD:
+ /* Send FIN-ACK notify app and enter CLOSE-WAIT */
+ tcp_connection_timers_reset (tc0);
+ tcp_make_finack (tc0, b0);
+ next0 = tcp_next_output (tc0->c_is_ip4);
+ stream_session_disconnect_notify (&tc0->connection);
+ tc0->state = TCP_STATE_CLOSE_WAIT;
+ break;
+ case TCP_STATE_CLOSE_WAIT:
+ case TCP_STATE_CLOSING:
+ case TCP_STATE_LAST_ACK:
+ /* move along .. */
+ break;
+ case TCP_STATE_FIN_WAIT_1:
+ tc0->state = TCP_STATE_TIME_WAIT;
+ tcp_connection_timers_reset (tc0);
+ tcp_timer_set (tc0, TCP_TIMER_2MSL, TCP_2MSL_TIME);
+ break;
+ case TCP_STATE_FIN_WAIT_2:
+ /* Got FIN, send ACK! */
+ tc0->state = TCP_STATE_TIME_WAIT;
+ tcp_timer_set (tc0, TCP_TIMER_2MSL, TCP_2MSL_TIME);
+ tcp_make_ack (tc0, b0);
+ next0 = tcp_next_output (is_ip4);
+ break;
+ case TCP_STATE_TIME_WAIT:
+ /* Remain in the TIME-WAIT state. Restart the 2 MSL time-wait
+ * timeout.
+ */
+ tcp_timer_update (tc0, TCP_TIMER_2MSL, TCP_2MSL_TIME);
+ break;
+ }
+
+ b0->error = error0 ? node->errors[error0] : 0;
+
+ drop:
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ errors = session_manager_flush_enqueue_events (my_thread_index);
+ if (errors)
+ {
+ if (is_ip4)
+ vlib_node_increment_counter (vm, tcp4_established_node.index,
+ TCP_ERROR_EVENT_FIFO_FULL, errors);
+ else
+ vlib_node_increment_counter (vm, tcp6_established_node.index,
+ TCP_ERROR_EVENT_FIFO_FULL, errors);
+ }
+
+ return from_frame->n_vectors;
+}
+
+static uword
+tcp4_rcv_process (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_rcv_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
+}
+
+static uword
+tcp6_rcv_process (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_rcv_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp4_rcv_process_node) =
+{
+ .function = tcp4_rcv_process,
+ .name = "tcp4-rcv-process",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_RCV_PROCESS_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_RCV_PROCESS_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp4_rcv_process_node, tcp4_rcv_process);
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp6_rcv_process_node) =
+{
+ .function = tcp6_rcv_process,
+ .name = "tcp6-rcv-process",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_RCV_PROCESS_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_RCV_PROCESS_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp6_rcv_process_node, tcp6_rcv_process);
+
+vlib_node_registration_t tcp4_listen_node;
+vlib_node_registration_t tcp6_listen_node;
+
+/**
+ * LISTEN state processing as per RFC 793 p. 65
+ */
+always_inline uword
+tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, int is_ip4)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ u32 my_thread_index = vm->cpu_index;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ u8 sst = is_ip4 ? SESSION_TYPE_IP4_TCP : SESSION_TYPE_IP6_TCP;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ tcp_header_t *th0 = 0;
+ tcp_connection_t *lc0;
+ ip4_header_t *ip40;
+ ip6_header_t *ip60;
+ tcp_connection_t *child0;
+ u32 error0 = TCP_ERROR_SYNS_RCVD, next0 = TCP_LISTEN_NEXT_DROP;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ lc0 = tcp_listener_get (vnet_buffer (b0)->tcp.connection_index);
+
+ if (is_ip4)
+ {
+ ip40 = vlib_buffer_get_current (b0);
+ th0 = ip4_next_header (ip40);
+ }
+ else
+ {
+ ip60 = vlib_buffer_get_current (b0);
+ th0 = ip6_next_header (ip60);
+ }
+
+ /* Create child session. For syn-flood protection use filter */
+
+ /* 1. first check for an RST */
+ if (tcp_rst (th0))
+ goto drop;
+
+ /* 2. second check for an ACK */
+ if (tcp_ack (th0))
+ {
+ tcp_send_reset (b0, is_ip4);
+ goto drop;
+ }
+
+ /* 3. check for a SYN (did that already) */
+
+ /* Create child session and send SYN-ACK */
+ pool_get (tm->connections[my_thread_index], child0);
+ memset (child0, 0, sizeof (*child0));
+
+ child0->c_c_index = child0 - tm->connections[my_thread_index];
+ child0->c_lcl_port = lc0->c_lcl_port;
+ child0->c_rmt_port = th0->src_port;
+ child0->c_is_ip4 = is_ip4;
+ child0->c_thread_index = my_thread_index;
+
+ if (is_ip4)
+ {
+ child0->c_lcl_ip4.as_u32 = ip40->dst_address.as_u32;
+ child0->c_rmt_ip4.as_u32 = ip40->src_address.as_u32;
+ }
+ else
+ {
+ clib_memcpy (&child0->c_lcl_ip6, &ip60->dst_address,
+ sizeof (ip6_address_t));
+ clib_memcpy (&child0->c_rmt_ip6, &ip60->src_address,
+ sizeof (ip6_address_t));
+ }
+
+ if (stream_session_accept (&child0->connection, lc0->c_s_index, sst,
+ 0 /* notify */ ))
+ {
+ error0 = TCP_ERROR_CREATE_SESSION_FAIL;
+ goto drop;
+ }
+
+ tcp_options_parse (th0, &child0->opt);
+ tcp_connection_init_vars (child0);
+
+ child0->irs = vnet_buffer (b0)->tcp.seq_number;
+ child0->rcv_nxt = vnet_buffer (b0)->tcp.seq_number + 1;
+ child0->state = TCP_STATE_SYN_RCVD;
+
+ /* RFC1323: TSval timestamps sent on {SYN} and {SYN,ACK}
+ * segments are used to initialize PAWS. */
+ if (tcp_opts_tstamp (&child0->opt))
+ {
+ child0->tsval_recent = child0->opt.tsval;
+ child0->tsval_recent_age = tcp_time_now ();
+ }
+
+ /* Reuse buffer to make syn-ack and send */
+ tcp_make_synack (child0, b0);
+ next0 = tcp_next_output (is_ip4);
+
+ drop:
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+
+ }
+
+ b0->error = error0 ? node->errors[error0] : 0;
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ return from_frame->n_vectors;
+}
+
+static uword
+tcp4_listen (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_listen_inline (vm, node, from_frame, 1 /* is_ip4 */ );
+}
+
+static uword
+tcp6_listen (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_listen_inline (vm, node, from_frame, 0 /* is_ip4 */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp4_listen_node) =
+{
+ .function = tcp4_listen,
+ .name = "tcp4-listen",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_LISTEN_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_LISTEN_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp4_listen_node, tcp4_listen);
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp6_listen_node) =
+{
+ .function = tcp6_listen,
+ .name = "tcp6-listen",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_LISTEN_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_LISTEN_NEXT_##s] = n,
+ foreach_tcp_state_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp6_listen_node, tcp6_listen);
+
+vlib_node_registration_t tcp4_input_node;
+vlib_node_registration_t tcp6_input_node;
+
+typedef enum _tcp_input_next
+{
+ TCP_INPUT_NEXT_DROP,
+ TCP_INPUT_NEXT_LISTEN,
+ TCP_INPUT_NEXT_RCV_PROCESS,
+ TCP_INPUT_NEXT_SYN_SENT,
+ TCP_INPUT_NEXT_ESTABLISHED,
+ TCP_INPUT_NEXT_RESET,
+ TCP_INPUT_N_NEXT
+} tcp_input_next_t;
+
+#define foreach_tcp4_input_next \
+ _ (DROP, "error-drop") \
+ _ (LISTEN, "tcp4-listen") \
+ _ (RCV_PROCESS, "tcp4-rcv-process") \
+ _ (SYN_SENT, "tcp4-syn-sent") \
+ _ (ESTABLISHED, "tcp4-established") \
+ _ (RESET, "tcp4-reset")
+
+#define foreach_tcp6_input_next \
+ _ (DROP, "error-drop") \
+ _ (LISTEN, "tcp6-listen") \
+ _ (RCV_PROCESS, "tcp6-rcv-process") \
+ _ (SYN_SENT, "tcp6-syn-sent") \
+ _ (ESTABLISHED, "tcp6-established") \
+ _ (RESET, "tcp6-reset")
+
+typedef struct
+{
+ u16 src_port;
+ u16 dst_port;
+ u8 state;
+} tcp_rx_trace_t;
+
+const char *tcp_fsm_states[] = {
+#define _(sym, str) str,
+ foreach_tcp_fsm_state
+#undef _
+};
+
+u8 *
+format_tcp_state (u8 * s, va_list * args)
+{
+ tcp_state_t *state = va_arg (*args, tcp_state_t *);
+
+ if (state[0] < TCP_N_STATES)
+ s = format (s, "%s", tcp_fsm_states[state[0]]);
+ else
+ s = format (s, "UNKNOWN");
+
+ return s;
+}
+
+u8 *
+format_tcp_rx_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ tcp_rx_trace_t *t = va_arg (*args, tcp_rx_trace_t *);
+
+ s = format (s, "TCP: src-port %d dst-port %U%s\n",
+ clib_net_to_host_u16 (t->src_port),
+ clib_net_to_host_u16 (t->dst_port), format_tcp_state, t->state);
+
+ return s;
+}
+
+#define filter_flags (TCP_FLAG_SYN|TCP_FLAG_ACK|TCP_FLAG_RST|TCP_FLAG_FIN)
+
+always_inline uword
+tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, int is_ip4)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ u32 my_thread_index = vm->cpu_index;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ session_manager_main_t *ssm = vnet_get_session_manager_main ();
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ tcp_header_t *tcp0 = 0;
+ tcp_connection_t *tc0;
+ ip4_header_t *ip40;
+ ip6_header_t *ip60;
+ u32 error0 = TCP_ERROR_NO_LISTENER, next0 = TCP_INPUT_NEXT_DROP;
+ u8 flags0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ if (is_ip4)
+ {
+ ip40 = vlib_buffer_get_current (b0);
+ tcp0 = ip4_next_header (ip40);
+
+ /* lookup session */
+ tc0 =
+ (tcp_connection_t *) stream_session_lookup_transport4 (ssm,
+ &ip40->dst_address,
+ &ip40->src_address,
+ tcp0->dst_port,
+ tcp0->src_port,
+ SESSION_TYPE_IP4_TCP,
+ my_thread_index);
+ }
+ else
+ {
+ ip60 = vlib_buffer_get_current (b0);
+ tcp0 = ip6_next_header (ip60);
+ tc0 =
+ (tcp_connection_t *) stream_session_lookup_transport6 (ssm,
+ &ip60->src_address,
+ &ip60->dst_address,
+ tcp0->src_port,
+ tcp0->dst_port,
+ SESSION_TYPE_IP6_TCP,
+ my_thread_index);
+ }
+
+ /* Session exists */
+ if (PREDICT_TRUE (0 != tc0))
+ {
+ /* Save connection index */
+ vnet_buffer (b0)->tcp.connection_index = tc0->c_c_index;
+ vnet_buffer (b0)->tcp.seq_number =
+ clib_net_to_host_u32 (tcp0->seq_number);
+ vnet_buffer (b0)->tcp.ack_number =
+ clib_net_to_host_u32 (tcp0->ack_number);
+
+ flags0 = tcp0->flags & filter_flags;
+ next0 = tm->dispatch_table[tc0->state][flags0].next;
+ error0 = tm->dispatch_table[tc0->state][flags0].error;
+
+ if (PREDICT_FALSE (error0 == TCP_ERROR_DISPATCH))
+ {
+ /* Overload tcp flags to store state */
+ vnet_buffer (b0)->tcp.flags = tc0->state;
+ }
+ }
+ else
+ {
+ /* Send reset */
+ next0 = TCP_INPUT_NEXT_RESET;
+ error0 = TCP_ERROR_NO_LISTENER;
+ vnet_buffer (b0)->tcp.flags = 0;
+ }
+
+ b0->error = error0 ? node->errors[error0] : 0;
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return from_frame->n_vectors;
+}
+
+static uword
+tcp4_input (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ );
+}
+
+static uword
+tcp6_input (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp4_input_node) =
+{
+ .function = tcp4_input,
+ .name = "tcp4-input",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_INPUT_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_INPUT_NEXT_##s] = n,
+ foreach_tcp4_input_next
+#undef _
+ },
+ .format_buffer = format_tcp_header,
+ .format_trace = format_tcp_rx_trace,
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp4_input_node, tcp4_input);
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp6_input_node) =
+{
+ .function = tcp6_input,
+ .name = "tcp6-input",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_INPUT_N_NEXT,
+ .next_nodes =
+ {
+#define _(s,n) [TCP_INPUT_NEXT_##s] = n,
+ foreach_tcp6_input_next
+#undef _
+ },
+ .format_buffer = format_tcp_header,
+ .format_trace = format_tcp_rx_trace,
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp6_input_node, tcp6_input);
+void
+tcp_update_time (f64 now, u32 thread_index)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ tw_timer_expire_timers_16t_2w_512sl (&tm->timer_wheels[thread_index], now);
+}
+
+static void
+tcp_dispatch_table_init (tcp_main_t * tm)
+{
+ int i, j;
+ for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
+ for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
+ {
+ tm->dispatch_table[i][j].next = TCP_INPUT_NEXT_DROP;
+ tm->dispatch_table[i][j].error = TCP_ERROR_DISPATCH;
+ }
+
+#define _(t,f,n,e) \
+do { \
+ tm->dispatch_table[TCP_STATE_##t][f].next = (n); \
+ tm->dispatch_table[TCP_STATE_##t][f].error = (e); \
+} while (0)
+
+ /* SYNs for new connections -> tcp-listen. */
+ _(LISTEN, TCP_FLAG_SYN, TCP_INPUT_NEXT_LISTEN, TCP_ERROR_NONE);
+ /* ACK for for a SYN-ACK -> tcp-rcv-process. */
+ _(SYN_RCVD, TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
+ /* SYN-ACK for a SYN */
+ _(SYN_SENT, TCP_FLAG_SYN | TCP_FLAG_ACK, TCP_INPUT_NEXT_SYN_SENT,
+ TCP_ERROR_NONE);
+ _(SYN_SENT, TCP_FLAG_ACK, TCP_INPUT_NEXT_SYN_SENT, TCP_ERROR_NONE);
+ _(SYN_SENT, TCP_FLAG_RST, TCP_INPUT_NEXT_SYN_SENT, TCP_ERROR_NONE);
+ _(SYN_SENT, TCP_FLAG_RST | TCP_FLAG_ACK, TCP_INPUT_NEXT_SYN_SENT,
+ TCP_ERROR_NONE);
+ /* ACK for for established connection -> tcp-established. */
+ _(ESTABLISHED, TCP_FLAG_ACK, TCP_INPUT_NEXT_ESTABLISHED, TCP_ERROR_NONE);
+ /* FIN for for established connection -> tcp-established. */
+ _(ESTABLISHED, TCP_FLAG_FIN, TCP_INPUT_NEXT_ESTABLISHED, TCP_ERROR_NONE);
+ _(ESTABLISHED, TCP_FLAG_FIN | TCP_FLAG_ACK, TCP_INPUT_NEXT_ESTABLISHED,
+ TCP_ERROR_NONE);
+ /* ACK or FIN-ACK to our FIN */
+ _(FIN_WAIT_1, TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
+ _(FIN_WAIT_1, TCP_FLAG_ACK | TCP_FLAG_FIN, TCP_INPUT_NEXT_RCV_PROCESS,
+ TCP_ERROR_NONE);
+ /* FIN in reply to our FIN from the other side */
+ _(FIN_WAIT_1, TCP_FLAG_FIN, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
+ /* FIN confirming that the peer (app) has closed */
+ _(FIN_WAIT_2, TCP_FLAG_FIN, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
+ _(FIN_WAIT_2, TCP_FLAG_FIN | TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS,
+ TCP_ERROR_NONE);
+ _(LAST_ACK, TCP_FLAG_ACK, TCP_INPUT_NEXT_RCV_PROCESS, TCP_ERROR_NONE);
+#undef _
+}
+
+clib_error_t *
+tcp_input_init (vlib_main_t * vm)
+{
+ clib_error_t *error = 0;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+
+ if ((error = vlib_call_init_function (vm, tcp_init)))
+ return error;
+
+ /* Initialize dispatch table. */
+ tcp_dispatch_table_init (tm);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (tcp_input_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/tcp/tcp.h>
+
+void
+newreno_congestion (tcp_connection_t * tc)
+{
+ tc->prev_ssthresh = tc->ssthresh;
+ tc->ssthresh = clib_max (tcp_flight_size (tc) / 2, 2 * tc->snd_mss);
+}
+
+void
+newreno_recovered (tcp_connection_t * tc)
+{
+ tc->cwnd = tc->ssthresh;
+}
+
+void
+newreno_rcv_ack (tcp_connection_t * tc)
+{
+ if (tcp_in_slowstart (tc))
+ {
+ tc->cwnd += clib_min (tc->snd_mss, tc->bytes_acked);
+ }
+ else
+ {
+ /* Round up to 1 if needed */
+ tc->cwnd += clib_max (tc->snd_mss * tc->snd_mss / tc->cwnd, 1);
+ }
+}
+
+void
+newreno_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type)
+{
+ if (ack_type == TCP_CC_DUPACK)
+ {
+ tc->cwnd += tc->snd_mss;
+ }
+ else if (ack_type == TCP_CC_PARTIALACK)
+ {
+ tc->cwnd -= tc->bytes_acked;
+ if (tc->bytes_acked > tc->snd_mss)
+ tc->bytes_acked += tc->snd_mss;
+ }
+}
+
+void
+newreno_conn_init (tcp_connection_t * tc)
+{
+ tc->ssthresh = tc->snd_wnd;
+ tc->cwnd = tcp_initial_cwnd (tc);
+}
+
+const static tcp_cc_algorithm_t tcp_newreno = {
+ .congestion = newreno_congestion,
+ .recovered = newreno_recovered,
+ .rcv_ack = newreno_rcv_ack,
+ .rcv_cong_ack = newreno_rcv_cong_ack,
+ .init = newreno_conn_init
+};
+
+clib_error_t *
+newreno_init (vlib_main_t * vm)
+{
+ clib_error_t *error = 0;
+
+ tcp_cc_algo_register (TCP_CC_NEWRENO, &tcp_newreno);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (newreno_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/tcp/tcp.h>
+#include <vnet/lisp-cp/packets.h>
+
+vlib_node_registration_t tcp4_output_node;
+vlib_node_registration_t tcp6_output_node;
+
+typedef enum _tcp_output_nect
+{
+ TCP_OUTPUT_NEXT_DROP,
+ TCP_OUTPUT_NEXT_IP_LOOKUP,
+ TCP_OUTPUT_N_NEXT
+} tcp_output_next_t;
+
+#define foreach_tcp4_output_next \
+ _ (DROP, "error-drop") \
+ _ (IP_LOOKUP, "ip4-lookup")
+
+#define foreach_tcp6_output_next \
+ _ (DROP, "error-drop") \
+ _ (IP_LOOKUP, "ip6-lookup")
+
+static char *tcp_error_strings[] = {
+#define tcp_error(n,s) s,
+#include <vnet/tcp/tcp_error.def>
+#undef tcp_error
+};
+
+typedef struct
+{
+ u16 src_port;
+ u16 dst_port;
+ u8 state;
+} tcp_tx_trace_t;
+
+u16 dummy_mtu = 400;
+
+u8 *
+format_tcp_tx_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+
+ s = format (s, "TBD\n");
+
+ return s;
+}
+
+void
+tcp_set_snd_mss (tcp_connection_t * tc)
+{
+ u16 snd_mss;
+
+ /* TODO find our iface MTU */
+ snd_mss = dummy_mtu;
+
+ /* TODO cache mss and consider PMTU discovery */
+ snd_mss = tc->opt.mss < snd_mss ? tc->opt.mss : snd_mss;
+
+ tc->snd_mss = snd_mss;
+
+ if (tc->snd_mss == 0)
+ {
+ clib_warning ("snd mss is 0");
+ tc->snd_mss = dummy_mtu;
+ }
+}
+
+static u8
+tcp_window_compute_scale (u32 available_space)
+{
+ u8 wnd_scale = 0;
+ while (wnd_scale < TCP_MAX_WND_SCALE
+ && (available_space >> wnd_scale) > TCP_WND_MAX)
+ wnd_scale++;
+ return wnd_scale;
+}
+
+/**
+ * Compute initial window and scale factor. As per RFC1323, window field in
+ * SYN and SYN-ACK segments is never scaled.
+ */
+u32
+tcp_initial_window_to_advertise (tcp_connection_t * tc)
+{
+ u32 available_space;
+
+ /* Initial wnd for SYN. Fifos are not allocated yet.
+ * Use some predefined value */
+ if (tc->state != TCP_STATE_SYN_RCVD)
+ {
+ return TCP_DEFAULT_RX_FIFO_SIZE;
+ }
+
+ available_space = stream_session_max_enqueue (&tc->connection);
+ tc->rcv_wscale = tcp_window_compute_scale (available_space);
+ tc->rcv_wnd = clib_min (available_space, TCP_WND_MAX << tc->rcv_wscale);
+
+ return clib_min (tc->rcv_wnd, TCP_WND_MAX);
+}
+
+/**
+ * Compute and return window to advertise, scaled as per RFC1323
+ */
+u32
+tcp_window_to_advertise (tcp_connection_t * tc, tcp_state_t state)
+{
+ u32 available_space, wnd, scaled_space;
+
+ if (state != TCP_STATE_ESTABLISHED)
+ return tcp_initial_window_to_advertise (tc);
+
+ available_space = stream_session_max_enqueue (&tc->connection);
+ scaled_space = available_space >> tc->rcv_wscale;
+
+ /* Need to update scale */
+ if (PREDICT_FALSE ((scaled_space == 0 && available_space != 0))
+ || (scaled_space >= TCP_WND_MAX))
+ tc->rcv_wscale = tcp_window_compute_scale (available_space);
+
+ wnd = clib_min (available_space, TCP_WND_MAX << tc->rcv_wscale);
+ tc->rcv_wnd = wnd;
+
+ return wnd >> tc->rcv_wscale;
+}
+
+/**
+ * Write TCP options to segment.
+ */
+u32
+tcp_options_write (u8 * data, tcp_options_t * opts)
+{
+ u32 opts_len = 0;
+ u32 buf, seq_len = 4;
+
+ if (tcp_opts_mss (opts))
+ {
+ *data++ = TCP_OPTION_MSS;
+ *data++ = TCP_OPTION_LEN_MSS;
+ buf = clib_host_to_net_u16 (opts->mss);
+ clib_memcpy (data, &buf, sizeof (opts->mss));
+ data += sizeof (opts->mss);
+ opts_len += TCP_OPTION_LEN_MSS;
+ }
+
+ if (tcp_opts_wscale (opts))
+ {
+ *data++ = TCP_OPTION_WINDOW_SCALE;
+ *data++ = TCP_OPTION_LEN_WINDOW_SCALE;
+ *data++ = opts->wscale;
+ opts_len += TCP_OPTION_LEN_WINDOW_SCALE;
+ }
+
+ if (tcp_opts_sack_permitted (opts))
+ {
+ *data++ = TCP_OPTION_SACK_PERMITTED;
+ *data++ = TCP_OPTION_LEN_SACK_PERMITTED;
+ opts_len += TCP_OPTION_LEN_SACK_PERMITTED;
+ }
+
+ if (tcp_opts_tstamp (opts))
+ {
+ *data++ = TCP_OPTION_TIMESTAMP;
+ *data++ = TCP_OPTION_LEN_TIMESTAMP;
+ buf = clib_host_to_net_u32 (opts->tsval);
+ clib_memcpy (data, &buf, sizeof (opts->tsval));
+ data += sizeof (opts->tsval);
+ buf = clib_host_to_net_u32 (opts->tsecr);
+ clib_memcpy (data, &buf, sizeof (opts->tsecr));
+ data += sizeof (opts->tsecr);
+ opts_len += TCP_OPTION_LEN_TIMESTAMP;
+ }
+
+ if (tcp_opts_sack (opts))
+ {
+ int i;
+ u32 n_sack_blocks = clib_min (vec_len (opts->sacks),
+ TCP_OPTS_MAX_SACK_BLOCKS);
+
+ if (n_sack_blocks != 0)
+ {
+ *data++ = TCP_OPTION_SACK_BLOCK;
+ *data++ = 2 + n_sack_blocks * TCP_OPTION_LEN_SACK_BLOCK;
+ for (i = 0; i < n_sack_blocks; i++)
+ {
+ buf = clib_host_to_net_u32 (opts->sacks[i].start);
+ clib_memcpy (data, &buf, seq_len);
+ data += seq_len;
+ buf = clib_host_to_net_u32 (opts->sacks[i].end);
+ clib_memcpy (data, &buf, seq_len);
+ data += seq_len;
+ }
+ opts_len += 2 + n_sack_blocks * TCP_OPTION_LEN_SACK_BLOCK;
+ }
+ }
+
+ /* Terminate TCP options */
+ if (opts_len % 4)
+ {
+ *data++ = TCP_OPTION_EOL;
+ opts_len += TCP_OPTION_LEN_EOL;
+ }
+
+ /* Pad with zeroes to a u32 boundary */
+ while (opts_len % 4)
+ {
+ *data++ = TCP_OPTION_NOOP;
+ opts_len += TCP_OPTION_LEN_NOOP;
+ }
+ return opts_len;
+}
+
+always_inline int
+tcp_make_syn_options (tcp_options_t * opts, u32 initial_wnd)
+{
+ u8 len = 0;
+
+ opts->flags |= TCP_OPTS_FLAG_MSS;
+ opts->mss = dummy_mtu; /*XXX discover that */
+ len += TCP_OPTION_LEN_MSS;
+
+ opts->flags |= TCP_OPTS_FLAG_WSCALE;
+ opts->wscale = tcp_window_compute_scale (initial_wnd);
+ len += TCP_OPTION_LEN_WINDOW_SCALE;
+
+ opts->flags |= TCP_OPTS_FLAG_TSTAMP;
+ opts->tsval = tcp_time_now ();
+ opts->tsecr = 0;
+ len += TCP_OPTION_LEN_TIMESTAMP;
+
+ opts->flags |= TCP_OPTS_FLAG_SACK_PERMITTED;
+ len += TCP_OPTION_LEN_SACK_PERMITTED;
+
+ /* Align to needed boundary */
+ len += (TCP_OPTS_ALIGN - len % TCP_OPTS_ALIGN) % TCP_OPTS_ALIGN;
+ return len;
+}
+
+always_inline int
+tcp_make_synack_options (tcp_connection_t * tc, tcp_options_t * opts)
+{
+ u8 len = 0;
+
+ opts->flags |= TCP_OPTS_FLAG_MSS;
+ opts->mss = dummy_mtu; /*XXX discover that */
+ len += TCP_OPTION_LEN_MSS;
+
+ if (tcp_opts_wscale (&tc->opt))
+ {
+ opts->flags |= TCP_OPTS_FLAG_WSCALE;
+ opts->wscale = tc->rcv_wscale;
+ len += TCP_OPTION_LEN_WINDOW_SCALE;
+ }
+
+ if (tcp_opts_tstamp (&tc->opt))
+ {
+ opts->flags |= TCP_OPTS_FLAG_TSTAMP;
+ opts->tsval = tcp_time_now ();
+ opts->tsecr = tc->tsval_recent;
+ len += TCP_OPTION_LEN_TIMESTAMP;
+ }
+
+ if (tcp_opts_sack_permitted (&tc->opt))
+ {
+ opts->flags |= TCP_OPTS_FLAG_SACK_PERMITTED;
+ len += TCP_OPTION_LEN_SACK_PERMITTED;
+ }
+
+ /* Align to needed boundary */
+ len += (TCP_OPTS_ALIGN - len % TCP_OPTS_ALIGN) % TCP_OPTS_ALIGN;
+ return len;
+}
+
+always_inline int
+tcp_make_established_options (tcp_connection_t * tc, tcp_options_t * opts)
+{
+ u8 len = 0;
+
+ opts->flags = 0;
+
+ if (tcp_opts_tstamp (&tc->opt))
+ {
+ opts->flags |= TCP_OPTS_FLAG_TSTAMP;
+ opts->tsval = tcp_time_now ();
+ opts->tsecr = tc->tsval_recent;
+ len += TCP_OPTION_LEN_TIMESTAMP;
+ }
+ if (tcp_opts_sack_permitted (&tc->opt))
+ {
+ if (vec_len (tc->snd_sacks))
+ {
+ opts->flags |= TCP_OPTS_FLAG_SACK;
+ opts->sacks = tc->snd_sacks;
+ opts->n_sack_blocks = vec_len (tc->snd_sacks);
+ len += 2 + TCP_OPTION_LEN_SACK_BLOCK * opts->n_sack_blocks;
+ }
+ }
+
+ /* Align to needed boundary */
+ len += (TCP_OPTS_ALIGN - len % TCP_OPTS_ALIGN) % TCP_OPTS_ALIGN;
+ return len;
+}
+
+always_inline int
+tcp_make_options (tcp_connection_t * tc, tcp_options_t * opts,
+ tcp_state_t state)
+{
+ switch (state)
+ {
+ case TCP_STATE_ESTABLISHED:
+ case TCP_STATE_FIN_WAIT_1:
+ return tcp_make_established_options (tc, opts);
+ case TCP_STATE_SYN_RCVD:
+ return tcp_make_synack_options (tc, opts);
+ case TCP_STATE_SYN_SENT:
+ return tcp_make_syn_options (opts,
+ tcp_initial_window_to_advertise (tc));
+ default:
+ clib_warning ("Not handled!");
+ return 0;
+ }
+}
+
+#define tcp_get_free_buffer_index(tm, bidx) \
+do { \
+ u32 *my_tx_buffers, n_free_buffers; \
+ u32 cpu_index = tm->vlib_main->cpu_index; \
+ my_tx_buffers = tm->tx_buffers[cpu_index]; \
+ if (PREDICT_FALSE(vec_len (my_tx_buffers) == 0)) \
+ { \
+ n_free_buffers = 32; /* TODO config or macro */ \
+ vec_validate (my_tx_buffers, n_free_buffers - 1); \
+ _vec_len(my_tx_buffers) = vlib_buffer_alloc_from_free_list ( \
+ tm->vlib_main, my_tx_buffers, n_free_buffers, \
+ VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); \
+ tm->tx_buffers[cpu_index] = my_tx_buffers; \
+ } \
+ /* buffer shortage */ \
+ if (PREDICT_FALSE (vec_len (my_tx_buffers) == 0)) \
+ return; \
+ *bidx = my_tx_buffers[_vec_len (my_tx_buffers)-1]; \
+ _vec_len (my_tx_buffers) -= 1; \
+} while (0)
+
+always_inline void
+tcp_reuse_buffer (vlib_main_t * vm, vlib_buffer_t * b)
+{
+ vlib_buffer_t *it = b;
+ do
+ {
+ it->current_data = 0;
+ it->current_length = 0;
+ it->total_length_not_including_first_buffer = 0;
+ }
+ while ((it->flags & VLIB_BUFFER_NEXT_PRESENT)
+ && (it = vlib_get_buffer (vm, it->next_buffer)));
+
+ /* Leave enough space for headers */
+ vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
+}
+
+/**
+ * Prepare ACK
+ */
+void
+tcp_make_ack_i (tcp_connection_t * tc, vlib_buffer_t * b, tcp_state_t state,
+ u8 flags)
+{
+ tcp_options_t _snd_opts, *snd_opts = &_snd_opts;
+ u8 tcp_opts_len, tcp_hdr_opts_len;
+ tcp_header_t *th;
+ u16 wnd;
+
+ wnd = tcp_window_to_advertise (tc, state);
+
+ /* Make and write options */
+ tcp_opts_len = tcp_make_established_options (tc, snd_opts);
+ tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
+
+ th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->snd_nxt,
+ tc->rcv_nxt, tcp_hdr_opts_len, flags, wnd);
+
+ tcp_options_write ((u8 *) (th + 1), snd_opts);
+
+ /* Mark as ACK */
+ vnet_buffer (b)->tcp.connection_index = tc->c_c_index;
+}
+
+/**
+ * Convert buffer to ACK
+ */
+void
+tcp_make_ack (tcp_connection_t * tc, vlib_buffer_t * b)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+
+ tcp_reuse_buffer (vm, b);
+ tcp_make_ack_i (tc, b, TCP_STATE_ESTABLISHED, TCP_FLAG_ACK);
+ vnet_buffer (b)->tcp.flags = TCP_BUF_FLAG_ACK;
+}
+
+/**
+ * Convert buffer to FIN-ACK
+ */
+void
+tcp_make_finack (tcp_connection_t * tc, vlib_buffer_t * b)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+
+ tcp_reuse_buffer (vm, b);
+ tcp_make_ack_i (tc, b, TCP_STATE_ESTABLISHED, TCP_FLAG_ACK | TCP_FLAG_FIN);
+
+ /* Reset flags, make sure ack is sent */
+ tc->flags = TCP_CONN_SNDACK;
+ vnet_buffer (b)->tcp.flags &= ~TCP_BUF_FLAG_DUPACK;
+
+ tc->snd_nxt += 1;
+}
+
+/**
+ * Convert buffer to SYN-ACK
+ */
+void
+tcp_make_synack (tcp_connection_t * tc, vlib_buffer_t * b)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+ tcp_options_t _snd_opts, *snd_opts = &_snd_opts;
+ u8 tcp_opts_len, tcp_hdr_opts_len;
+ tcp_header_t *th;
+ u16 initial_wnd;
+ u32 time_now;
+
+ memset (snd_opts, 0, sizeof (*snd_opts));
+
+ tcp_reuse_buffer (vm, b);
+
+ /* Set random initial sequence */
+ time_now = tcp_time_now ();
+
+ tc->iss = random_u32 (&time_now);
+ tc->snd_una = tc->iss;
+ tc->snd_nxt = tc->iss + 1;
+ tc->snd_una_max = tc->snd_nxt;
+
+ initial_wnd = tcp_initial_window_to_advertise (tc);
+
+ /* Make and write options */
+ tcp_opts_len = tcp_make_synack_options (tc, snd_opts);
+ tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
+
+ th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->iss,
+ tc->rcv_nxt, tcp_hdr_opts_len,
+ TCP_FLAG_SYN | TCP_FLAG_ACK, initial_wnd);
+
+ tcp_options_write ((u8 *) (th + 1), snd_opts);
+
+ vnet_buffer (b)->tcp.connection_index = tc->c_c_index;
+ vnet_buffer (b)->tcp.flags = TCP_BUF_FLAG_ACK;
+
+ /* Init retransmit timer */
+ tcp_retransmit_timer_set (tm, tc);
+}
+
+always_inline void
+tcp_enqueue_to_ip_lookup (vlib_main_t * vm, vlib_buffer_t * b, u32 bi,
+ u8 is_ip4)
+{
+ u32 *to_next, next_index;
+ vlib_frame_t *f;
+
+ b->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
+ b->error = 0;
+
+ /* Default FIB for now */
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = 0;
+
+ /* Send to IP lookup */
+ next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index;
+ f = vlib_get_frame_to_node (vm, next_index);
+
+ /* Enqueue the packet */
+ to_next = vlib_frame_vector_args (f);
+ to_next[0] = bi;
+ f->n_vectors = 1;
+ vlib_put_frame_to_node (vm, next_index, f);
+}
+
+int
+tcp_make_reset_in_place (vlib_main_t * vm, vlib_buffer_t * b0,
+ tcp_state_t state, u32 my_thread_index, u8 is_ip4)
+{
+ u8 tcp_hdr_len = sizeof (tcp_header_t);
+ ip4_header_t *ih4;
+ ip6_header_t *ih6;
+ tcp_header_t *th0;
+ ip4_address_t src_ip40;
+ ip6_address_t src_ip60;
+ u16 src_port0;
+ u32 tmp;
+
+ /* Find IP and TCP headers */
+ if (is_ip4)
+ {
+ ih4 = vlib_buffer_get_current (b0);
+ th0 = ip4_next_header (ih4);
+ }
+ else
+ {
+ ih6 = vlib_buffer_get_current (b0);
+ th0 = ip6_next_header (ih6);
+ }
+
+ /* Swap src and dst ip */
+ if (is_ip4)
+ {
+ ASSERT ((ih4->ip_version_and_header_length & 0xF0) == 0x40);
+ src_ip40.as_u32 = ih4->src_address.as_u32;
+ ih4->src_address.as_u32 = ih4->dst_address.as_u32;
+ ih4->dst_address.as_u32 = src_ip40.as_u32;
+
+ /* Chop the end of the pkt */
+ b0->current_length += ip4_header_bytes (ih4) + tcp_hdr_len;
+ }
+ else
+ {
+ ASSERT ((ih6->ip_version_traffic_class_and_flow_label & 0xF0) == 0x60);
+ clib_memcpy (&src_ip60, &ih6->src_address, sizeof (ip6_address_t));
+ clib_memcpy (&ih6->src_address, &ih6->dst_address,
+ sizeof (ip6_address_t));
+ clib_memcpy (&ih6->dst_address, &src_ip60, sizeof (ip6_address_t));
+
+ /* Chop the end of the pkt */
+ b0->current_length += sizeof (ip6_header_t) + tcp_hdr_len;
+ }
+
+ /* Try to determine what/why we're actually resetting and swap
+ * src and dst ports */
+ if (state == TCP_STATE_CLOSED)
+ {
+ if (!tcp_syn (th0))
+ return -1;
+
+ tmp = clib_net_to_host_u32 (th0->seq_number);
+
+ /* Got a SYN for no listener. */
+ th0->flags = TCP_FLAG_RST | TCP_FLAG_ACK;
+ th0->ack_number = clib_host_to_net_u32 (tmp + 1);
+ th0->seq_number = 0;
+
+ }
+ else if (state >= TCP_STATE_SYN_SENT)
+ {
+ th0->flags = TCP_FLAG_RST | TCP_FLAG_ACK;
+ th0->seq_number = th0->ack_number;
+ th0->ack_number = 0;
+ }
+
+ src_port0 = th0->src_port;
+ th0->src_port = th0->dst_port;
+ th0->dst_port = src_port0;
+ th0->window = 0;
+ th0->data_offset_and_reserved = (tcp_hdr_len >> 2) << 4;
+ th0->urgent_pointer = 0;
+
+ /* Compute checksum */
+ if (is_ip4)
+ {
+ th0->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ih4);
+ }
+ else
+ {
+ int bogus = ~0;
+ th0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ih6, &bogus);
+ ASSERT (!bogus);
+ }
+
+ return 0;
+}
+
+/**
+ * Send reset without reusing existing buffer
+ */
+void
+tcp_send_reset (vlib_buffer_t * pkt, u8 is_ip4)
+{
+ vlib_buffer_t *b;
+ u32 bi;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+ u8 tcp_hdr_len, flags = 0;
+ tcp_header_t *th, *pkt_th;
+ u32 seq, ack;
+ ip4_header_t *ih4, *pkt_ih4;
+ ip6_header_t *ih6, *pkt_ih6;
+
+ tcp_get_free_buffer_index (tm, &bi);
+ b = vlib_get_buffer (vm, bi);
+
+ /* Leave enough space for headers */
+ vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
+
+ /* Make and write options */
+ tcp_hdr_len = sizeof (tcp_header_t);
+
+ if (is_ip4)
+ {
+ pkt_ih4 = vlib_buffer_get_current (pkt);
+ pkt_th = ip4_next_header (pkt_ih4);
+ }
+ else
+ {
+ pkt_ih6 = vlib_buffer_get_current (pkt);
+ pkt_th = ip6_next_header (pkt_ih6);
+ }
+
+ if (tcp_ack (pkt_th))
+ {
+ flags = TCP_FLAG_RST;
+ seq = pkt_th->ack_number;
+ ack = 0;
+ }
+ else
+ {
+ flags = TCP_FLAG_RST | TCP_FLAG_ACK;
+ seq = 0;
+ ack = clib_host_to_net_u32 (vnet_buffer (pkt)->tcp.seq_end);
+ }
+
+ th = vlib_buffer_push_tcp_net_order (b, pkt_th->dst_port, pkt_th->src_port,
+ seq, ack, tcp_hdr_len, flags, 0);
+
+ /* Swap src and dst ip */
+ if (is_ip4)
+ {
+ ASSERT ((pkt_ih4->ip_version_and_header_length & 0xF0) == 0x40);
+ ih4 = vlib_buffer_push_ip4 (vm, b, &pkt_ih4->dst_address,
+ &pkt_ih4->src_address, IP_PROTOCOL_TCP);
+ th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ih4);
+ }
+ else
+ {
+ int bogus = ~0;
+ pkt_ih6 = (ip6_header_t *) (pkt_th - 1);
+ ASSERT ((pkt_ih6->ip_version_traffic_class_and_flow_label & 0xF0) ==
+ 0x60);
+ ih6 =
+ vlib_buffer_push_ip6 (vm, b, &pkt_ih6->dst_address,
+ &pkt_ih6->src_address, IP_PROTOCOL_TCP);
+ th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ih6, &bogus);
+ ASSERT (!bogus);
+ }
+
+ tcp_enqueue_to_ip_lookup (vm, b, bi, is_ip4);
+}
+
+void
+tcp_push_ip_hdr (tcp_main_t * tm, tcp_connection_t * tc, vlib_buffer_t * b)
+{
+ tcp_header_t *th = vlib_buffer_get_current (b);
+
+ if (tc->c_is_ip4)
+ {
+ ip4_header_t *ih;
+ ih = vlib_buffer_push_ip4 (tm->vlib_main, b, &tc->c_lcl_ip4,
+ &tc->c_rmt_ip4, IP_PROTOCOL_TCP);
+ th->checksum = ip4_tcp_udp_compute_checksum (tm->vlib_main, b, ih);
+ }
+ else
+ {
+ ip6_header_t *ih;
+ int bogus = ~0;
+
+ ih = vlib_buffer_push_ip6 (tm->vlib_main, b, &tc->c_lcl_ip6,
+ &tc->c_rmt_ip6, IP_PROTOCOL_TCP);
+ th->checksum = ip6_tcp_udp_icmp_compute_checksum (tm->vlib_main, b, ih,
+ &bogus);
+ ASSERT (!bogus);
+ }
+}
+
+/**
+ * Send SYN
+ *
+ * Builds a SYN packet for a half-open connection and sends it to ipx_lookup.
+ * The packet is not forwarded through tcpx_output to avoid doing lookups
+ * in the half_open pool.
+ */
+void
+tcp_send_syn (tcp_connection_t * tc)
+{
+ vlib_buffer_t *b;
+ u32 bi;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+ u8 tcp_hdr_opts_len, tcp_opts_len;
+ tcp_header_t *th;
+ u32 time_now;
+ u16 initial_wnd;
+ tcp_options_t snd_opts;
+
+ tcp_get_free_buffer_index (tm, &bi);
+ b = vlib_get_buffer (vm, bi);
+
+ /* Leave enough space for headers */
+ vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
+
+ /* Set random initial sequence */
+ time_now = tcp_time_now ();
+
+ tc->iss = random_u32 (&time_now);
+ tc->snd_una = tc->iss;
+ tc->snd_una_max = tc->snd_nxt = tc->iss + 1;
+
+ initial_wnd = tcp_initial_window_to_advertise (tc);
+
+ /* Make and write options */
+ memset (&snd_opts, 0, sizeof (snd_opts));
+ tcp_opts_len = tcp_make_syn_options (&snd_opts, initial_wnd);
+ tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
+
+ th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->iss,
+ tc->rcv_nxt, tcp_hdr_opts_len, TCP_FLAG_SYN,
+ initial_wnd);
+
+ tcp_options_write ((u8 *) (th + 1), &snd_opts);
+
+ /* Measure RTT with this */
+ tc->rtt_ts = tcp_time_now ();
+ tc->rtt_seq = tc->snd_nxt;
+
+ /* Start retransmit trimer */
+ tcp_timer_set (tc, TCP_TIMER_RETRANSMIT_SYN, tc->rto * TCP_TO_TIMER_TICK);
+ tc->rto_boff = 0;
+
+ /* Set the connection establishment timer */
+ tcp_timer_set (tc, TCP_TIMER_ESTABLISH, TCP_ESTABLISH_TIME);
+
+ tcp_push_ip_hdr (tm, tc, b);
+ tcp_enqueue_to_ip_lookup (vm, b, bi, tc->c_is_ip4);
+}
+
+always_inline void
+tcp_enqueue_to_output (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, u8 is_ip4)
+{
+ u32 *to_next, next_index;
+ vlib_frame_t *f;
+
+ b->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
+ b->error = 0;
+
+ /* Decide where to send the packet */
+ next_index = is_ip4 ? tcp4_output_node.index : tcp6_output_node.index;
+ f = vlib_get_frame_to_node (vm, next_index);
+
+ /* Enqueue the packet */
+ to_next = vlib_frame_vector_args (f);
+ to_next[0] = bi;
+ f->n_vectors = 1;
+ vlib_put_frame_to_node (vm, next_index, f);
+}
+
+/**
+ * Send FIN
+ */
+void
+tcp_send_fin (tcp_connection_t * tc)
+{
+ vlib_buffer_t *b;
+ u32 bi;
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+
+ tcp_get_free_buffer_index (tm, &bi);
+ b = vlib_get_buffer (vm, bi);
+
+ /* Leave enough space for headers */
+ vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
+
+ tcp_make_finack (tc, b);
+
+ tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4);
+}
+
+always_inline u8
+tcp_make_state_flags (tcp_state_t next_state)
+{
+ switch (next_state)
+ {
+ case TCP_STATE_ESTABLISHED:
+ return TCP_FLAG_ACK;
+ case TCP_STATE_SYN_RCVD:
+ return TCP_FLAG_SYN | TCP_FLAG_ACK;
+ case TCP_STATE_SYN_SENT:
+ return TCP_FLAG_SYN;
+ case TCP_STATE_LAST_ACK:
+ case TCP_STATE_FIN_WAIT_1:
+ return TCP_FLAG_FIN;
+ default:
+ clib_warning ("Shouldn't be here!");
+ }
+ return 0;
+}
+
+/**
+ * Push TCP header and update connection variables
+ */
+static void
+tcp_push_hdr_i (tcp_connection_t * tc, vlib_buffer_t * b,
+ tcp_state_t next_state)
+{
+ u32 advertise_wnd, data_len;
+ u8 tcp_opts_len, tcp_hdr_opts_len, opts_write_len, flags;
+ tcp_options_t _snd_opts, *snd_opts = &_snd_opts;
+ tcp_header_t *th;
+
+ data_len = b->current_length;
+ vnet_buffer (b)->tcp.flags = 0;
+
+ /* Make and write options */
+ memset (snd_opts, 0, sizeof (*snd_opts));
+ tcp_opts_len = tcp_make_options (tc, snd_opts, next_state);
+ tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
+
+ /* Get rcv window to advertise */
+ advertise_wnd = tcp_window_to_advertise (tc, next_state);
+ flags = tcp_make_state_flags (next_state);
+
+ /* Push header and options */
+ th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->snd_nxt,
+ tc->rcv_nxt, tcp_hdr_opts_len, flags,
+ advertise_wnd);
+
+ opts_write_len = tcp_options_write ((u8 *) (th + 1), snd_opts);
+
+ ASSERT (opts_write_len == tcp_opts_len);
+
+ /* Tag the buffer with the connection index */
+ vnet_buffer (b)->tcp.connection_index = tc->c_c_index;
+
+ tc->snd_nxt += data_len;
+}
+
+/* Send delayed ACK when timer expires */
+void
+tcp_timer_delack_handler (u32 index)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+ u32 thread_index = os_get_cpu_number ();
+ tcp_connection_t *tc;
+ vlib_buffer_t *b;
+ u32 bi;
+
+ tc = tcp_connection_get (index, thread_index);
+
+ /* Get buffer */
+ tcp_get_free_buffer_index (tm, &bi);
+ b = vlib_get_buffer (vm, bi);
+
+ /* Fill in the ACK */
+ tcp_make_ack (tc, b);
+
+ tc->timers[TCP_TIMER_DELACK] = TCP_TIMER_HANDLE_INVALID;
+ tc->flags &= ~TCP_CONN_DELACK;
+
+ tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4);
+}
+
+/** Build a retransmit segment
+ *
+ * @return the number of bytes in the segment or 0 if there's nothing to
+ * retransmit
+ * */
+u32
+tcp_prepare_retransmit_segment (tcp_connection_t * tc, vlib_buffer_t * b,
+ u32 max_bytes)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+ u32 n_bytes, offset = 0;
+ sack_scoreboard_hole_t *hole;
+ u32 hole_size;
+
+ tcp_reuse_buffer (vm, b);
+
+ ASSERT (tc->state == TCP_STATE_ESTABLISHED);
+ ASSERT (max_bytes != 0);
+
+ if (tcp_opts_sack_permitted (&tc->opt))
+ {
+ /* XXX get first hole not retransmitted yet */
+ hole = scoreboard_first_hole (&tc->sack_sb);
+ if (!hole)
+ return 0;
+
+ offset = hole->start - tc->snd_una;
+ hole_size = hole->end - hole->start;
+
+ ASSERT (hole_size);
+
+ if (hole_size < max_bytes)
+ max_bytes = hole_size;
+ }
+ else
+ {
+ if (seq_geq (tc->snd_nxt, tc->snd_una_max))
+ return 0;
+ }
+
+ n_bytes = stream_session_peek_bytes (&tc->connection,
+ vlib_buffer_get_current (b), offset,
+ max_bytes);
+ ASSERT (n_bytes != 0);
+
+ tc->snd_nxt += n_bytes;
+ tcp_push_hdr_i (tc, b, tc->state);
+
+ return n_bytes;
+}
+
+static void
+tcp_timer_retransmit_handler_i (u32 index, u8 is_syn)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ vlib_main_t *vm = tm->vlib_main;
+ u32 thread_index = os_get_cpu_number ();
+ tcp_connection_t *tc;
+ vlib_buffer_t *b;
+ u32 bi, max_bytes, snd_space;
+
+ if (is_syn)
+ {
+ tc = tcp_half_open_connection_get (index);
+ }
+ else
+ {
+ tc = tcp_connection_get (index, thread_index);
+ }
+
+ /* Make sure timer handle is set to invalid */
+ tc->timers[TCP_TIMER_RETRANSMIT] = TCP_TIMER_HANDLE_INVALID;
+
+ /* Increment RTO backoff (also equal to number of retries) */
+ tc->rto_boff += 1;
+
+ /* Go back to first un-acked byte */
+ tc->snd_nxt = tc->snd_una;
+
+ /* Get buffer */
+ tcp_get_free_buffer_index (tm, &bi);
+ b = vlib_get_buffer (vm, bi);
+
+ if (tc->state == TCP_STATE_ESTABLISHED)
+ {
+ tcp_fastrecovery_off (tc);
+
+ /* Exponential backoff */
+ tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX);
+
+ /* Figure out what and how many bytes we can send */
+ snd_space = tcp_available_snd_space (tc);
+ max_bytes = clib_min (tc->snd_mss, snd_space);
+ tcp_prepare_retransmit_segment (tc, b, max_bytes);
+
+ tc->rtx_bytes += max_bytes;
+
+ /* No fancy recovery for now! */
+ scoreboard_clear (&tc->sack_sb);
+ }
+ else
+ {
+ /* Retransmit for SYN/SYNACK */
+ ASSERT (tc->state == TCP_STATE_SYN_RCVD
+ || tc->state == TCP_STATE_SYN_SENT);
+
+ /* Try without increasing RTO a number of times. If this fails,
+ * start growing RTO exponentially */
+ if (tc->rto_boff > TCP_RTO_SYN_RETRIES)
+ tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX);
+
+ vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
+ tcp_push_hdr_i (tc, b, tc->state);
+ }
+
+ if (!is_syn)
+ {
+ tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4);
+
+ /* Re-enable retransmit timer */
+ tcp_retransmit_timer_set (tm, tc);
+ }
+ else
+ {
+ ASSERT (tc->state == TCP_STATE_SYN_SENT);
+
+ /* This goes straight to ipx_lookup */
+ tcp_push_ip_hdr (tm, tc, b);
+ tcp_enqueue_to_ip_lookup (vm, b, bi, tc->c_is_ip4);
+
+ /* Re-enable retransmit timer */
+ tcp_timer_set (tc, TCP_TIMER_RETRANSMIT_SYN,
+ tc->rto * TCP_TO_TIMER_TICK);
+ }
+}
+
+void
+tcp_timer_retransmit_handler (u32 index)
+{
+ tcp_timer_retransmit_handler_i (index, 0);
+}
+
+void
+tcp_timer_retransmit_syn_handler (u32 index)
+{
+ tcp_timer_retransmit_handler_i (index, 1);
+}
+
+/**
+ * Retansmit first unacked segment */
+void
+tcp_retransmit_first_unacked (tcp_connection_t * tc)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ u32 snd_nxt = tc->snd_nxt;
+ vlib_buffer_t *b;
+ u32 bi;
+
+ tc->snd_nxt = tc->snd_una;
+
+ /* Get buffer */
+ tcp_get_free_buffer_index (tm, &bi);
+ b = vlib_get_buffer (tm->vlib_main, bi);
+
+ tcp_prepare_retransmit_segment (tc, b, tc->snd_mss);
+ tcp_enqueue_to_output (tm->vlib_main, b, bi, tc->c_is_ip4);
+
+ tc->snd_nxt = snd_nxt;
+ tc->rtx_bytes += tc->snd_mss;
+}
+
+void
+tcp_fast_retransmit (tcp_connection_t * tc)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ u32 snd_space, max_bytes, n_bytes, bi;
+ vlib_buffer_t *b;
+
+ ASSERT (tcp_in_fastrecovery (tc));
+
+ clib_warning ("fast retransmit!");
+
+ /* Start resending from first un-acked segment */
+ tc->snd_nxt = tc->snd_una;
+
+ snd_space = tcp_available_snd_space (tc);
+
+ while (snd_space)
+ {
+ tcp_get_free_buffer_index (tm, &bi);
+ b = vlib_get_buffer (tm->vlib_main, bi);
+
+ max_bytes = clib_min (tc->snd_mss, snd_space);
+ n_bytes = tcp_prepare_retransmit_segment (tc, b, max_bytes);
+
+ /* Nothing left to retransmit */
+ if (n_bytes == 0)
+ return;
+
+ tcp_enqueue_to_output (tm->vlib_main, b, bi, tc->c_is_ip4);
+
+ snd_space -= n_bytes;
+ }
+
+ /* If window allows, send new data */
+ tc->snd_nxt = tc->snd_una_max;
+}
+
+always_inline u32
+tcp_session_has_ooo_data (tcp_connection_t * tc)
+{
+ stream_session_t *s =
+ stream_session_get (tc->c_s_index, tc->c_thread_index);
+ return svm_fifo_has_ooo_data (s->server_rx_fifo);
+}
+
+always_inline uword
+tcp46_output_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, int is_ip4)
+{
+ tcp_main_t *tm = vnet_get_tcp_main ();
+ u32 n_left_from, next_index, *from, *to_next;
+ u32 my_thread_index = vm->cpu_index;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ tcp_connection_t *tc0;
+ tcp_header_t *th0;
+ u32 error0 = TCP_ERROR_PKTS_SENT, next0 = TCP_OUTPUT_NEXT_IP_LOOKUP;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ tc0 = tcp_connection_get (vnet_buffer (b0)->tcp.connection_index,
+ my_thread_index);
+ th0 = vlib_buffer_get_current (b0);
+
+ if (is_ip4)
+ {
+ ip4_header_t *ih0;
+ ih0 = vlib_buffer_push_ip4 (vm, b0, &tc0->c_lcl_ip4,
+ &tc0->c_rmt_ip4, IP_PROTOCOL_TCP);
+ th0->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ih0);
+ }
+ else
+ {
+ ip6_header_t *ih0;
+ int bogus = ~0;
+
+ ih0 = vlib_buffer_push_ip6 (vm, b0, &tc0->c_lcl_ip6,
+ &tc0->c_rmt_ip6, IP_PROTOCOL_TCP);
+ th0->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ih0,
+ &bogus);
+ ASSERT (!bogus);
+ }
+
+ /* Filter out DUPACKs if there are no OOO segments left */
+ if (PREDICT_FALSE
+ (vnet_buffer (b0)->tcp.flags & TCP_BUF_FLAG_DUPACK))
+ {
+ tc0->snt_dupacks--;
+ ASSERT (tc0->snt_dupacks >= 0);
+ if (!tcp_session_has_ooo_data (tc0))
+ {
+ error0 = TCP_ERROR_FILTERED_DUPACKS;
+ next0 = TCP_OUTPUT_NEXT_DROP;
+ goto done;
+ }
+ }
+
+ /* Retransmitted SYNs do reach this but it should be harmless */
+ tc0->rcv_las = tc0->rcv_nxt;
+
+ /* Stop DELACK timer and fix flags */
+ tc0->flags &=
+ ~(TCP_CONN_SNDACK | TCP_CONN_DELACK | TCP_CONN_BURSTACK);
+ if (tcp_timer_is_active (tc0, TCP_TIMER_DELACK))
+ {
+ tcp_timer_reset (tc0, TCP_TIMER_DELACK);
+ }
+
+ /* If not retransmitting
+ * 1) update snd_una_max (SYN, SYNACK, new data, FIN)
+ * 2) If we're not tracking an ACK, start tracking */
+ if (seq_lt (tc0->snd_una_max, tc0->snd_nxt))
+ {
+ tc0->snd_una_max = tc0->snd_nxt;
+ if (tc0->rtt_ts == 0)
+ {
+ tc0->rtt_ts = tcp_time_now ();
+ tc0->rtt_seq = tc0->snd_nxt;
+ }
+ }
+
+ /* Set the retransmit timer if not set already and not
+ * doing a pure ACK */
+ if (!tcp_timer_is_active (tc0, TCP_TIMER_RETRANSMIT)
+ && tc0->snd_nxt != tc0->snd_una)
+ {
+ tcp_retransmit_timer_set (tm, tc0);
+ tc0->rto_boff = 0;
+ }
+
+ /* set fib index to default and lookup node */
+ /* XXX network virtualization (vrf/vni) */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+
+ b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
+
+ done:
+ b0->error = error0 != 0 ? node->errors[error0] : 0;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return from_frame->n_vectors;
+}
+
+static uword
+tcp4_output (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_output_inline (vm, node, from_frame, 1 /* is_ip4 */ );
+}
+
+static uword
+tcp6_output (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_output_inline (vm, node, from_frame, 0 /* is_ip4 */ );
+}
+
+VLIB_REGISTER_NODE (tcp4_output_node) =
+{
+ .function = tcp4_output,.name = "tcp4-output",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),.n_errors = TCP_N_ERROR,.error_strings =
+ tcp_error_strings,.n_next_nodes = TCP_OUTPUT_N_NEXT,.next_nodes =
+ {
+#define _(s,n) [TCP_OUTPUT_NEXT_##s] = n,
+ foreach_tcp4_output_next
+#undef _
+ }
+,.format_buffer = format_tcp_header,.format_trace = format_tcp_tx_trace,};
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp4_output_node, tcp4_output)
+VLIB_REGISTER_NODE (tcp6_output_node) =
+{
+ .function = tcp6_output,.name = "tcp6-output",
+ /* Takes a vector of packets. */
+ .vector_size = sizeof (u32),.n_errors = TCP_N_ERROR,.error_strings =
+ tcp_error_strings,.n_next_nodes = TCP_OUTPUT_N_NEXT,.next_nodes =
+ {
+#define _(s,n) [TCP_OUTPUT_NEXT_##s] = n,
+ foreach_tcp6_output_next
+#undef _
+ }
+,.format_buffer = format_tcp_header,.format_trace = format_tcp_tx_trace,};
+
+VLIB_NODE_FUNCTION_MULTIARCH (tcp6_output_node, tcp6_output) u32
+tcp_push_header (transport_connection_t * tconn, vlib_buffer_t * b)
+{
+ tcp_connection_t *tc;
+
+ tc = (tcp_connection_t *) tconn;
+ tcp_push_hdr_i (tc, b, TCP_STATE_ESTABLISHED);
+ return 0;
+}
+
+typedef enum _tcp_reset_next
+{
+ TCP_RESET_NEXT_DROP,
+ TCP_RESET_NEXT_IP_LOOKUP,
+ TCP_RESET_N_NEXT
+} tcp_reset_next_t;
+
+#define foreach_tcp4_reset_next \
+ _(DROP, "error-drop") \
+ _(IP_LOOKUP, "ip4-lookup")
+
+#define foreach_tcp6_reset_next \
+ _(DROP, "error-drop") \
+ _(IP_LOOKUP, "ip6-lookup")
+
+static uword
+tcp46_send_reset_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, u8 is_ip4)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ u32 my_thread_index = vm->cpu_index;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 error0 = TCP_ERROR_RST_SENT, next0 = TCP_RESET_NEXT_IP_LOOKUP;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ if (tcp_make_reset_in_place (vm, b0, vnet_buffer (b0)->tcp.flags,
+ my_thread_index, is_ip4))
+ {
+ error0 = TCP_ERROR_LOOKUP_DROPS;
+ next0 = TCP_RESET_NEXT_DROP;
+ goto done;
+ }
+
+ /* Prepare to send to IP lookup */
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = 0;
+ next0 = TCP_RESET_NEXT_IP_LOOKUP;
+
+ done:
+ b0->error = error0 != 0 ? node->errors[error0] : 0;
+ b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ return from_frame->n_vectors;
+}
+
+static uword
+tcp4_send_reset (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_send_reset_inline (vm, node, from_frame, 1);
+}
+
+static uword
+tcp6_send_reset (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return tcp46_send_reset_inline (vm, node, from_frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp4_reset_node) = {
+ .function = tcp4_send_reset,
+ .name = "tcp4-reset",
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_RESET_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [TCP_RESET_NEXT_##s] = n,
+ foreach_tcp4_reset_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (tcp6_reset_node) = {
+ .function = tcp6_send_reset,
+ .name = "tcp6-reset",
+ .vector_size = sizeof (u32),
+ .n_errors = TCP_N_ERROR,
+ .error_strings = tcp_error_strings,
+ .n_next_nodes = TCP_RESET_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [TCP_RESET_NEXT_##s] = n,
+ foreach_tcp6_reset_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_tcp_packet_h
+#define included_tcp_packet_h
+
+#include <vnet/vnet.h>
+
+/* TCP flags bit 0 first. */
+#define foreach_tcp_flag \
+ _ (FIN) /**< No more data from sender. */ \
+ _ (SYN) /**< Synchronize sequence numbers. */ \
+ _ (RST) /**< Reset the connection. */ \
+ _ (PSH) /**< Push function. */ \
+ _ (ACK) /**< Ack field significant. */ \
+ _ (URG) /**< Urgent pointer field significant. */ \
+ _ (ECE) /**< ECN-echo. Receiver got CE packet */ \
+ _ (CWR) /**< Sender reduced congestion window */
+
+enum
+{
+#define _(f) TCP_FLAG_BIT_##f,
+ foreach_tcp_flag
+#undef _
+ TCP_N_FLAG_BITS,
+};
+
+enum
+{
+#define _(f) TCP_FLAG_##f = 1 << TCP_FLAG_BIT_##f,
+ foreach_tcp_flag
+#undef _
+};
+
+typedef struct _tcp_header
+{
+ union
+ {
+ struct
+ {
+ u16 src_port; /**< Source port. */
+ u16 dst_port; /**< Destination port. */
+ };
+ struct
+ {
+ u16 src, dst;
+ };
+ };
+
+ u32 seq_number; /**< Sequence number of the first data octet in this
+ * segment, except when SYN is present. If SYN
+ * is present the seq number is is the ISN and the
+ * first data octet is ISN+1 */
+ u32 ack_number; /**< Acknowledgement number if ACK is set. It contains
+ * the value of the next sequence number the sender
+ * of the segment is expecting to receive. */
+ u8 data_offset_and_reserved;
+ u8 flags; /**< Flags: see the macro above */
+ u16 window; /**< Number of bytes sender is willing to receive. */
+
+ u16 checksum; /**< Checksum of TCP pseudo header and data. */
+ u16 urgent_pointer; /**< Seq number of the byte after the urgent data. */
+} __attribute__ ((packed)) tcp_header_t;
+
+/* Flag tests that return 0 or !0 */
+#define tcp_doff(_th) ((_th)->data_offset_and_reserved >> 4)
+#define tcp_fin(_th) ((_th)->flags & TCP_FLAG_FIN)
+#define tcp_syn(_th) ((_th)->flags & TCP_FLAG_SYN)
+#define tcp_rst(_th) ((_th)->flags & TCP_FLAG_RST)
+#define tcp_psh(_th) ((_th)->flags & TCP_FLAG_PSH)
+#define tcp_ack(_th) ((_th)->flags & TCP_FLAG_ACK)
+#define tcp_urg(_th) ((_th)->flags & TCP_FLAG_URG)
+#define tcp_ece(_th) ((_th)->flags & TCP_FLAG_ECE)
+#define tcp_cwr(_th) ((_th)->flags & TCP_FLAG_CWR)
+
+/* Flag tests that return 0 or 1 */
+#define tcp_is_syn(_th) !!((_th)->flags & TCP_FLAG_SYN)
+#define tcp_is_fin(_th) !!((_th)->flags & TCP_FLAG_FIN)
+
+always_inline int
+tcp_header_bytes (tcp_header_t * t)
+{
+ return tcp_doff (t) * sizeof (u32);
+}
+
+/*
+ * TCP options.
+ */
+
+typedef enum tcp_option_type
+{
+ TCP_OPTION_EOL = 0, /**< End of options. */
+ TCP_OPTION_NOOP = 1, /**< No operation. */
+ TCP_OPTION_MSS = 2, /**< Limit MSS. */
+ TCP_OPTION_WINDOW_SCALE = 3, /**< Window scale. */
+ TCP_OPTION_SACK_PERMITTED = 4, /**< Selective Ack permitted. */
+ TCP_OPTION_SACK_BLOCK = 5, /**< Selective Ack block. */
+ TCP_OPTION_TIMESTAMP = 8, /**< Timestamps. */
+ TCP_OPTION_UTO = 28, /**< User timeout. */
+ TCP_OPTION_AO = 29, /**< Authentication Option. */
+} tcp_option_type_t;
+
+#define foreach_tcp_options_flag \
+ _ (MSS) /**< MSS advertised in SYN */ \
+ _ (TSTAMP) /**< Timestamp capability advertised in SYN */ \
+ _ (WSCALE) /**< Wnd scale capability advertised in SYN */ \
+ _ (SACK_PERMITTED) /**< SACK capability advertised in SYN */ \
+ _ (SACK) /**< SACK present */
+
+enum
+{
+#define _(f) TCP_OPTS_FLAG_BIT_##f,
+ foreach_tcp_options_flag
+#undef _
+ TCP_OPTIONS_N_FLAG_BITS,
+};
+
+enum
+{
+#define _(f) TCP_OPTS_FLAG_##f = 1 << TCP_OPTS_FLAG_BIT_##f,
+ foreach_tcp_options_flag
+#undef _
+};
+
+typedef struct _sack_block
+{
+ u32 start; /**< Start sequence number */
+ u32 end; /**< End sequence number */
+} sack_block_t;
+
+typedef struct
+{
+ u8 flags; /** Option flags, see above */
+
+ /* Received options */
+ u16 mss; /**< Maximum segment size advertised by peer */
+ u8 wscale; /**< Window scale advertised by peer */
+ u32 tsval; /**< Peer's timestamp value */
+ u32 tsecr; /**< Echoed/reflected time stamp */
+ sack_block_t *sacks; /**< SACK blocks received */
+ u8 n_sack_blocks; /**< Number of SACKs blocks */
+} tcp_options_t;
+
+/* Flag tests that return 0 or !0 */
+#define tcp_opts_mss(_to) ((_to)->flags & TCP_OPTS_FLAG_MSS)
+#define tcp_opts_tstamp(_to) ((_to)->flags & TCP_OPTS_FLAG_TSTAMP)
+#define tcp_opts_wscale(_to) ((_to)->flags & TCP_OPTS_FLAG_WSCALE)
+#define tcp_opts_sack(_to) ((_to)->flags & TCP_OPTS_FLAG_SACK)
+#define tcp_opts_sack_permitted(_to) ((_to)->flags & TCP_OPTS_FLAG_SACK_PERMITTED)
+
+/* TCP option lengths */
+#define TCP_OPTION_LEN_EOL 1
+#define TCP_OPTION_LEN_NOOP 1
+#define TCP_OPTION_LEN_MSS 4
+#define TCP_OPTION_LEN_WINDOW_SCALE 3
+#define TCP_OPTION_LEN_SACK_PERMITTED 2
+#define TCP_OPTION_LEN_TIMESTAMP 10
+#define TCP_OPTION_LEN_SACK_BLOCK 8
+
+#define TCP_WND_MAX 65535U
+#define TCP_MAX_WND_SCALE 14 /* See RFC 1323 */
+#define TCP_OPTS_ALIGN 4
+#define TCP_OPTS_MAX_SACK_BLOCKS 3
+#endif /* included_tcp_packet_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * ip/tcp_pg: TCP packet-generator interface
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vnet/ip/ip.h>
+#include <vnet/pg/pg.h>
+
+/* TCP flags bit 0 first. */
+#define foreach_tcp_flag \
+ _ (FIN) \
+ _ (SYN) \
+ _ (RST) \
+ _ (PSH) \
+ _ (ACK) \
+ _ (URG) \
+ _ (ECE) \
+ _ (CWR)
+
+static void
+tcp_pg_edit_function (pg_main_t * pg,
+ pg_stream_t * s,
+ pg_edit_group_t * g,
+ u32 * packets,
+ u32 n_packets)
+{
+ vlib_main_t * vm = vlib_get_main();
+ u32 ip_offset, tcp_offset;
+
+ tcp_offset = g->start_byte_offset;
+ ip_offset = (g-1)->start_byte_offset;
+
+ while (n_packets >= 1)
+ {
+ vlib_buffer_t * p0;
+ ip4_header_t * ip0;
+ tcp_header_t * tcp0;
+ ip_csum_t sum0;
+ u32 tcp_len0;
+
+ p0 = vlib_get_buffer (vm, packets[0]);
+ n_packets -= 1;
+ packets += 1;
+
+ ASSERT (p0->current_data == 0);
+ ip0 = (void *) (p0->data + ip_offset);
+ tcp0 = (void *) (p0->data + tcp_offset);
+ tcp_len0 = clib_net_to_host_u16 (ip0->length) - sizeof (ip0[0]);
+
+ /* Initialize checksum with header. */
+ if (BITS (sum0) == 32)
+ {
+ sum0 = clib_mem_unaligned (&ip0->src_address, u32);
+ sum0 = ip_csum_with_carry (sum0, clib_mem_unaligned (&ip0->dst_address, u32));
+ }
+ else
+ sum0 = clib_mem_unaligned (&ip0->src_address, u64);
+
+ sum0 = ip_csum_with_carry
+ (sum0, clib_host_to_net_u32 (tcp_len0 + (ip0->protocol << 16)));
+
+ /* Invalidate possibly old checksum. */
+ tcp0->checksum = 0;
+
+ sum0 = ip_incremental_checksum_buffer (vm, p0, tcp_offset, tcp_len0, sum0);
+
+ tcp0->checksum = ~ ip_csum_fold (sum0);
+ }
+}
+
+typedef struct {
+ pg_edit_t src, dst;
+ pg_edit_t seq_number, ack_number;
+ pg_edit_t data_offset_and_reserved;
+#define _(f) pg_edit_t f##_flag;
+ foreach_tcp_flag
+#undef _
+ pg_edit_t window;
+ pg_edit_t checksum;
+ pg_edit_t urgent_pointer;
+} pg_tcp_header_t;
+
+static inline void
+pg_tcp_header_init (pg_tcp_header_t * p)
+{
+ /* Initialize fields that are not bit fields in the IP header. */
+#define _(f) pg_edit_init (&p->f, tcp_header_t, f);
+ _ (src);
+ _ (dst);
+ _ (seq_number);
+ _ (ack_number);
+ _ (window);
+ _ (checksum);
+ _ (urgent_pointer);
+#undef _
+
+ /* Initialize bit fields. */
+#define _(f) \
+ pg_edit_init_bitfield (&p->f##_flag, tcp_header_t, \
+ flags, \
+ TCP_FLAG_BIT_##f, 1);
+
+ foreach_tcp_flag
+#undef _
+
+ pg_edit_init_bitfield (&p->data_offset_and_reserved, tcp_header_t,
+ data_offset_and_reserved,
+ 4, 4);
+}
+
+uword
+unformat_pg_tcp_header (unformat_input_t * input, va_list * args)
+{
+ pg_stream_t * s = va_arg (*args, pg_stream_t *);
+ pg_tcp_header_t * p;
+ u32 group_index;
+
+ p = pg_create_edit_group (s, sizeof (p[0]), sizeof (tcp_header_t),
+ &group_index);
+ pg_tcp_header_init (p);
+
+ /* Defaults. */
+ pg_edit_set_fixed (&p->seq_number, 0);
+ pg_edit_set_fixed (&p->ack_number, 0);
+
+ pg_edit_set_fixed (&p->data_offset_and_reserved,
+ sizeof (tcp_header_t) / sizeof (u32));
+
+ pg_edit_set_fixed (&p->window, 4096);
+ pg_edit_set_fixed (&p->urgent_pointer, 0);
+
+#define _(f) pg_edit_set_fixed (&p->f##_flag, 0);
+ foreach_tcp_flag
+#undef _
+
+ p->checksum.type = PG_EDIT_UNSPECIFIED;
+
+ if (! unformat (input, "TCP: %U -> %U",
+ unformat_pg_edit,
+ unformat_tcp_udp_port, &p->src,
+ unformat_pg_edit,
+ unformat_tcp_udp_port, &p->dst))
+ goto error;
+
+ /* Parse options. */
+ while (1)
+ {
+ if (unformat (input, "window %U",
+ unformat_pg_edit,
+ unformat_pg_number, &p->window))
+ ;
+
+ else if (unformat (input, "checksum %U",
+ unformat_pg_edit,
+ unformat_pg_number, &p->checksum))
+ ;
+
+ /* Flags. */
+#define _(f) else if (unformat (input, #f)) pg_edit_set_fixed (&p->f##_flag, 1);
+ foreach_tcp_flag
+#undef _
+
+ /* Can't parse input: try next protocol level. */
+ else
+ break;
+ }
+
+ {
+ ip_main_t * im = &ip_main;
+ u16 dst_port;
+ tcp_udp_port_info_t * pi;
+
+ pi = 0;
+ if (p->dst.type == PG_EDIT_FIXED)
+ {
+ dst_port = pg_edit_get_value (&p->dst, PG_EDIT_LO);
+ pi = ip_get_tcp_udp_port_info (im, dst_port);
+ }
+
+ if (pi && pi->unformat_pg_edit
+ && unformat_user (input, pi->unformat_pg_edit, s))
+ ;
+
+ else if (! unformat_user (input, unformat_pg_payload, s))
+ goto error;
+
+ if (p->checksum.type == PG_EDIT_UNSPECIFIED)
+ {
+ pg_edit_group_t * g = pg_stream_get_group (s, group_index);
+ g->edit_function = tcp_pg_edit_function;
+ g->edit_function_opaque = 0;
+ }
+
+ return 1;
+ }
+
+ error:
+ /* Free up any edits we may have added. */
+ pg_free_edit_group (s);
+ return 0;
+}
+
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <vnet/feature/feature.h>
+#include <vnet/ip/ip.h>
+#include <vppinfra/xxhash.h>
+
+typedef struct
+{
+ f64 next_reset;
+ f64 reset_interval;
+ u8 *syn_counts;
+} syn_filter4_runtime_t;
+
+typedef struct
+{
+ u32 next_index;
+ int not_a_syn;
+ u8 filter_value;
+} syn_filter4_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_syn_filter4_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ syn_filter4_trace_t *t = va_arg (*args, syn_filter4_trace_t *);
+
+ s = format (s, "SYN_FILTER4: next index %d, %s",
+ t->next_index, t->not_a_syn ? "not a syn" : "syn");
+ if (t->not_a_syn == 0)
+ s = format (s, ", filter value %d\n", t->filter_value);
+ else
+ s = format (s, "\n");
+ return s;
+}
+
+static vlib_node_registration_t syn_filter4_node;
+
+#define foreach_syn_filter_error \
+_(THROTTLED, "TCP SYN packet throttle drops") \
+_(OK, "TCP SYN packets passed")
+
+typedef enum
+{
+#define _(sym,str) SYN_FILTER_ERROR_##sym,
+ foreach_syn_filter_error
+#undef _
+ SYN_FILTER_N_ERROR,
+} syn_filter_error_t;
+
+static char *syn_filter4_error_strings[] = {
+#define _(sym,string) string,
+ foreach_syn_filter_error
+#undef _
+};
+
+typedef enum
+{
+ SYN_FILTER_NEXT_DROP,
+ SYN_FILTER_N_NEXT,
+} syn_filter_next_t;
+
+extern vnet_feature_arc_registration_t vnet_feat_arc_ip4_local;
+
+static uword
+syn_filter4_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ syn_filter_next_t next_index;
+ u32 ok_syn_packets = 0;
+ vnet_feature_main_t *fm = &feature_main;
+ u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index;
+ vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
+ syn_filter4_runtime_t *rt = (syn_filter4_runtime_t *) node->runtime_data;
+ f64 now = vlib_time_now (vm);
+ /* Shut up spurious gcc warnings. */
+ u8 *c0 = 0, *c1 = 0, *c2 = 0, *c3 = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ if (now > rt->next_reset)
+ {
+ memset (rt->syn_counts, 0, vec_len (rt->syn_counts));
+ rt->next_reset = now + rt->reset_interval;
+ }
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 8 && n_left_to_next >= 4)
+ {
+ u32 bi0, bi1, bi2, bi3;
+ vlib_buffer_t *b0, *b1, *b2, *b3;
+ u32 next0, next1, next2, next3;
+ ip4_header_t *ip0, *ip1, *ip2, *ip3;
+ tcp_header_t *tcp0, *tcp1, *tcp2, *tcp3;
+ u32 not_a_syn0 = 1, not_a_syn1 = 1, not_a_syn2 = 1, not_a_syn3 = 1;
+ u64 hash0, hash1, hash2, hash3;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p4, *p5, *p6, *p7;
+
+ p4 = vlib_get_buffer (vm, from[4]);
+ p5 = vlib_get_buffer (vm, from[5]);
+ p6 = vlib_get_buffer (vm, from[6]);
+ p7 = vlib_get_buffer (vm, from[7]);
+
+ vlib_prefetch_buffer_header (p4, LOAD);
+ vlib_prefetch_buffer_header (p5, LOAD);
+ vlib_prefetch_buffer_header (p6, LOAD);
+ vlib_prefetch_buffer_header (p7, LOAD);
+
+ CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ to_next[2] = bi2 = from[2];
+ to_next[3] = bi3 = from[3];
+ from += 4;
+ to_next += 4;
+ n_left_from -= 4;
+ n_left_to_next -= 4;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+ b2 = vlib_get_buffer (vm, bi2);
+ b3 = vlib_get_buffer (vm, bi3);
+
+ vnet_get_config_data
+ (&cm->config_main, &b0->current_config_index,
+ &next0, 0 /* sizeof (c0[0]) */ );
+ vnet_get_config_data
+ (&cm->config_main, &b1->current_config_index,
+ &next1, 0 /* sizeof (c0[0]) */ );
+ vnet_get_config_data
+ (&cm->config_main, &b2->current_config_index,
+ &next2, 0 /* sizeof (c0[0]) */ );
+ vnet_get_config_data
+ (&cm->config_main, &b3->current_config_index,
+ &next3, 0 /* sizeof (c0[0]) */ );
+
+ /* Not TCP? */
+ ip0 = vlib_buffer_get_current (b0);
+ if (ip0->protocol != IP_PROTOCOL_TCP)
+ goto trace00;
+
+ tcp0 = ip4_next_header (ip0);
+ /*
+ * Not a SYN?
+ * $$$$ hack: the TCP bitfield flags seem not to compile
+ * correct code.
+ */
+ if (PREDICT_TRUE (!(tcp0->flags & 0x2)))
+ goto trace00;
+
+ not_a_syn0 = 0;
+ hash0 = clib_xxhash ((u64) ip0->src_address.as_u32);
+ c0 = &rt->syn_counts[hash0 & (_vec_len (rt->syn_counts) - 1)];
+ if (PREDICT_FALSE (*c0 >= 0x80))
+ {
+ next0 = SYN_FILTER_NEXT_DROP;
+ b0->error = node->errors[SYN_FILTER_ERROR_THROTTLED];
+ goto trace00;
+ }
+ *c0 += 1;
+ ok_syn_packets++;
+
+ trace00:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ syn_filter4_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->not_a_syn = not_a_syn0;
+ t->next_index = next0;
+ t->filter_value = not_a_syn0 ? 0 : *c0;
+ }
+
+ /* Not TCP? */
+ ip1 = vlib_buffer_get_current (b1);
+ if (ip1->protocol != IP_PROTOCOL_TCP)
+ goto trace01;
+
+ tcp1 = ip4_next_header (ip1);
+ /*
+ * Not a SYN?
+ * $$$$ hack: the TCP bitfield flags seem not to compile
+ * correct code.
+ */
+ if (PREDICT_TRUE (!(tcp1->flags & 0x2)))
+ goto trace01;
+
+ not_a_syn1 = 0;
+ hash1 = clib_xxhash ((u64) ip1->src_address.as_u32);
+ c1 = &rt->syn_counts[hash1 & (_vec_len (rt->syn_counts) - 1)];
+ if (PREDICT_FALSE (*c1 >= 0x80))
+ {
+ next1 = SYN_FILTER_NEXT_DROP;
+ b1->error = node->errors[SYN_FILTER_ERROR_THROTTLED];
+ goto trace01;
+ }
+ *c1 += 1;
+ ok_syn_packets++;
+
+ trace01:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ syn_filter4_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->not_a_syn = not_a_syn1;
+ t->next_index = next1;
+ t->filter_value = not_a_syn1 ? 0 : *c1;
+ }
+
+ /* Not TCP? */
+ ip2 = vlib_buffer_get_current (b2);
+ if (ip2->protocol != IP_PROTOCOL_TCP)
+ goto trace02;
+
+ tcp2 = ip4_next_header (ip2);
+ /*
+ * Not a SYN?
+ * $$$$ hack: the TCP bitfield flags seem not to compile
+ * correct code.
+ */
+ if (PREDICT_TRUE (!(tcp2->flags & 0x2)))
+ goto trace02;
+
+ not_a_syn2 = 0;
+ hash2 = clib_xxhash ((u64) ip2->src_address.as_u32);
+ c2 = &rt->syn_counts[hash2 & (_vec_len (rt->syn_counts) - 1)];
+ if (PREDICT_FALSE (*c2 >= 0x80))
+ {
+ next2 = SYN_FILTER_NEXT_DROP;
+ b2->error = node->errors[SYN_FILTER_ERROR_THROTTLED];
+ goto trace02;
+ }
+ *c2 += 1;
+ ok_syn_packets++;
+
+ trace02:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b2->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ syn_filter4_trace_t *t =
+ vlib_add_trace (vm, node, b2, sizeof (*t));
+ t->not_a_syn = not_a_syn2;
+ t->next_index = next2;
+ t->filter_value = not_a_syn2 ? 0 : *c2;
+ }
+
+ /* Not TCP? */
+ ip3 = vlib_buffer_get_current (b3);
+ if (ip3->protocol != IP_PROTOCOL_TCP)
+ goto trace03;
+
+ tcp3 = ip4_next_header (ip3);
+ /*
+ * Not a SYN?
+ * $$$$ hack: the TCP bitfield flags seem not to compile
+ * correct code.
+ */
+ if (PREDICT_TRUE (!(tcp3->flags & 0x2)))
+ goto trace03;
+
+ not_a_syn3 = 0;
+ hash3 = clib_xxhash ((u64) ip3->src_address.as_u32);
+ c3 = &rt->syn_counts[hash3 & (_vec_len (rt->syn_counts) - 1)];
+ if (PREDICT_FALSE (*c3 >= 0x80))
+ {
+ next3 = SYN_FILTER_NEXT_DROP;
+ b3->error = node->errors[SYN_FILTER_ERROR_THROTTLED];
+ goto trace03;
+ }
+ *c3 += 1;
+ ok_syn_packets++;
+
+ trace03:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b3->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ syn_filter4_trace_t *t =
+ vlib_add_trace (vm, node, b3, sizeof (*t));
+ t->not_a_syn = not_a_syn3;
+ t->next_index = next3;
+ t->filter_value = not_a_syn3 ? 0 : *c3;
+ }
+ vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, bi2, bi3,
+ next0, next1, next2, next3);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ ip4_header_t *ip0;
+ tcp_header_t *tcp0;
+ u32 not_a_syn0 = 1;
+ u32 hash0;
+ u8 *c0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ vnet_get_config_data
+ (&cm->config_main, &b0->current_config_index,
+ &next0, 0 /* sizeof (c0[0]) */ );
+
+ /* Not TCP? */
+ ip0 = vlib_buffer_get_current (b0);
+ if (ip0->protocol != IP_PROTOCOL_TCP)
+ goto trace0;
+
+ tcp0 = ip4_next_header (ip0);
+ /*
+ * Not a SYN?
+ * $$$$ hack: the TCP bitfield flags seem not to compile
+ * correct code.
+ */
+ if (PREDICT_TRUE (!(tcp0->flags & 0x2)))
+ goto trace0;
+
+ not_a_syn0 = 0;
+ hash0 = clib_xxhash ((u64) ip0->src_address.as_u32);
+ c0 = &rt->syn_counts[hash0 & (_vec_len (rt->syn_counts) - 1)];
+ if (PREDICT_FALSE (*c0 >= 0x80))
+ {
+ next0 = SYN_FILTER_NEXT_DROP;
+ b0->error = node->errors[SYN_FILTER_ERROR_THROTTLED];
+ goto trace0;
+ }
+ *c0 += 1;
+ ok_syn_packets++;
+
+ trace0:
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ syn_filter4_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->not_a_syn = not_a_syn0;
+ t->next_index = next0;
+ t->filter_value = not_a_syn0 ? 0 : *c0;
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, syn_filter4_node.index,
+ SYN_FILTER_ERROR_OK, ok_syn_packets);
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (syn_filter4_node, static) =
+{
+ .function = syn_filter4_node_fn,
+ .name = "syn-filter-4",
+ .vector_size = sizeof (u32),
+ .format_trace = format_syn_filter4_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .runtime_data_bytes = sizeof (syn_filter4_runtime_t),
+ .n_errors = ARRAY_LEN(syn_filter4_error_strings),
+ .error_strings = syn_filter4_error_strings,
+
+ .n_next_nodes = SYN_FILTER_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [SYN_FILTER_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (syn_filter4_node, syn_filter4_node_fn);
+
+/* *INDENT-OFF* */
+VNET_FEATURE_INIT (syn_filter_4, static) =
+{
+ .arc_name = "ip4-local",
+ .node_name = "syn-filter-4",
+ .runs_before = VNET_FEATURES("ip4-local-end-of-arc"),
+};
+/* *INDENT-ON* */
+
+int
+syn_filter_enable_disable (u32 sw_if_index, int enable_disable)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_sw_interface_t *sw;
+ int rv = 0;
+
+ /* Utterly wrong? */
+ if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ /* Not a physical port? */
+ sw = vnet_get_sw_interface (vnm, sw_if_index);
+ if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ if (enable_disable)
+ {
+ vlib_main_t *vm = vlib_get_main ();
+ syn_filter4_runtime_t *rt;
+
+ rt = vlib_node_get_runtime_data (vm, syn_filter4_node.index);
+ vec_validate (rt->syn_counts, 1023);
+ /*
+ * Given perfect disperson / optimal hashing results:
+ * Allow 128k (successful) syns/sec. 1024, buckets each of which
+ * absorb 128 syns before filtering. Reset table once a second.
+ * Reality bites, lets try resetting once every 100ms.
+ */
+ rt->reset_interval = 0.1; /* reset interval in seconds */
+ }
+
+ rv = vnet_feature_enable_disable ("ip4-local", "syn-filter-4",
+ sw_if_index, enable_disable, 0, 0);
+
+ return rv;
+}
+
+static clib_error_t *
+syn_filter_enable_disable_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ u32 sw_if_index = ~0;
+ int enable_disable = 1;
+ int rv;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "disable"))
+ enable_disable = 0;
+ else if (unformat (input, "%U", unformat_vnet_sw_interface,
+ vnm, &sw_if_index))
+ ;
+ else
+ break;
+ }
+
+ if (sw_if_index == ~0)
+ return clib_error_return (0, "Please specify an interface...");
+
+ rv = syn_filter_enable_disable (sw_if_index, enable_disable);
+
+ switch (rv)
+ {
+ case 0:
+ break;
+
+ case VNET_API_ERROR_INVALID_SW_IF_INDEX:
+ return clib_error_return
+ (0, "Invalid interface, only works on physical ports");
+ break;
+
+ case VNET_API_ERROR_UNIMPLEMENTED:
+ return clib_error_return (0,
+ "Device driver doesn't support redirection");
+ break;
+
+ case VNET_API_ERROR_INVALID_VALUE:
+ return clib_error_return (0, "feature arc not found");
+
+ case VNET_API_ERROR_INVALID_VALUE_2:
+ return clib_error_return (0, "feature node not found");
+
+ default:
+ return clib_error_return (0, "syn_filter_enable_disable returned %d",
+ rv);
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (sr_content_command, static) =
+{
+ .path = "ip syn filter",
+ .short_help = "ip syn filter <interface-name> [disable]",
+ .function = syn_filter_enable_disable_command_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_tcp_timer_h__
+#define __included_tcp_timer_h__
+
+#include <vppinfra/tw_timer_16t_2w_512sl.h>
+#include <vppinfra/tw_timer_16t_1w_2048sl.h>
+
+#endif /* __included_tcp_timer_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** @file
+ udp builtin server
+*/
+
+#include <vnet/udp/udp.h>
+#include <vnet/session/session.h>
+#include <vnet/session/application_interface.h>
+
+/** per-worker built-in server copy buffers */
+u8 **copy_buffers;
+
+static int
+builtin_session_create_callback (stream_session_t * s)
+{
+ /* Simple version: declare session ready-to-go... */
+ s->session_state = SESSION_STATE_READY;
+ return 0;
+}
+
+static void
+builtin_session_disconnect_callback (stream_session_t * s)
+{
+ stream_session_disconnect (s);
+}
+
+static int
+builtin_server_rx_callback (stream_session_t * s)
+{
+ svm_fifo_t *rx_fifo, *tx_fifo;
+ u32 this_transfer;
+ int actual_transfer;
+ u8 *my_copy_buffer;
+ session_fifo_event_t evt;
+ unix_shared_memory_queue_t *q;
+
+ my_copy_buffer = copy_buffers[s->thread_index];
+ rx_fifo = s->server_rx_fifo;
+ tx_fifo = s->server_tx_fifo;
+
+ this_transfer = svm_fifo_max_enqueue (tx_fifo)
+ < svm_fifo_max_dequeue (rx_fifo) ?
+ svm_fifo_max_enqueue (tx_fifo) : svm_fifo_max_dequeue (rx_fifo);
+
+ vec_validate (my_copy_buffer, this_transfer - 1);
+ _vec_len (my_copy_buffer) = this_transfer;
+
+ actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, 0, this_transfer,
+ my_copy_buffer);
+ ASSERT (actual_transfer == this_transfer);
+ actual_transfer = svm_fifo_enqueue_nowait (tx_fifo, 0, this_transfer,
+ my_copy_buffer);
+
+ copy_buffers[s->thread_index] = my_copy_buffer;
+
+ /* Fabricate TX event, send to ourselves */
+ evt.fifo = tx_fifo;
+ evt.event_type = FIFO_EVENT_SERVER_TX;
+ /* $$$$ for event logging */
+ evt.enqueue_length = actual_transfer;
+ evt.event_id = 0;
+ q = session_manager_get_vpp_event_queue (s->thread_index);
+ unix_shared_memory_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+static session_cb_vft_t builtin_server = {
+ .session_accept_callback = builtin_session_create_callback,
+ .session_disconnect_callback = builtin_session_disconnect_callback,
+ .builtin_server_rx_callback = builtin_server_rx_callback
+};
+/* *INDENT-ON* */
+
+static int
+bind_builtin_uri_server (u8 * uri)
+{
+ vnet_bind_args_t _a, *a = &_a;
+ char segment_name[128];
+ u32 segment_name_length;
+ int rv;
+ u64 options[16];
+
+ segment_name_length = ARRAY_LEN (segment_name);
+
+ memset (a, 0, sizeof (*a));
+ memset (options, 0, sizeof (options));
+
+ a->uri = (char *) uri;
+ a->api_client_index = ~0; /* built-in server */
+ a->segment_name = segment_name;
+ a->segment_name_length = segment_name_length;
+ a->session_cb_vft = &builtin_server;
+
+ options[SESSION_OPTIONS_ACCEPT_COOKIE] = 0x12345678;
+ options[SESSION_OPTIONS_SEGMENT_SIZE] = (2 << 30); /*$$$$ config / arg */
+ a->options = options;
+
+ rv = vnet_bind_uri (a);
+
+ return rv;
+}
+
+static int
+unbind_builtin_uri_server (u8 * uri)
+{
+ int rv;
+
+ rv = vnet_unbind_uri ((char *) uri, ~0 /* client_index */ );
+
+ return rv;
+}
+
+static clib_error_t *
+builtin_server_init (vlib_main_t * vm)
+{
+ vlib_thread_main_t *vtm = vlib_get_thread_main ();
+ u32 num_threads;
+
+ num_threads = 1 /* main thread */ + vtm->n_threads;
+
+ vec_validate (copy_buffers, num_threads - 1);
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (builtin_server_init);
+
+static clib_error_t *
+builtin_uri_bind_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ u8 *uri = 0;
+ int rv;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "uri %s", &uri))
+ ;
+ else
+ break;
+ }
+
+ if (uri == 0)
+ return clib_error_return (0, "uri to bind not specified...");
+
+ rv = bind_builtin_uri_server (uri);
+
+ vec_free (uri);
+
+ switch (rv)
+ {
+ case 0:
+ break;
+
+ default:
+ return clib_error_return (0, "bind_uri_server returned %d", rv);
+ break;
+ }
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (builtin_uri_bind_command, static) =
+{
+ .path = "builtin uri bind",
+ .short_help = "builtin uri bind",
+ .function = builtin_uri_bind_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+builtin_uri_unbind_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ u8 *uri = 0;
+ int rv;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "uri %s", &uri))
+ ;
+ else
+ break;
+ }
+
+ if (uri == 0)
+ return clib_error_return (0, "uri to unbind not specified...");
+
+ rv = unbind_builtin_uri_server (uri);
+
+ vec_free (uri);
+
+ switch (rv)
+ {
+ case 0:
+ break;
+
+ default:
+ return clib_error_return (0, "unbind_uri_server returned %d", rv);
+ break;
+ }
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (builtin_uri_unbind_command, static) =
+{
+ .path = "builtin uri unbind",
+ .short_help = "builtin uri unbind",
+ .function = builtin_uri_unbind_command_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** @file
+ udp state machine, etc.
+*/
+
+#include <vnet/udp/udp.h>
+#include <vnet/session/session.h>
+#include <vnet/dpo/load_balance.h>
+#include <vnet/fib/ip4_fib.h>
+
+udp_uri_main_t udp_uri_main;
+
+u32
+udp_session_bind_ip4 (vlib_main_t * vm, u32 session_index,
+ ip46_address_t * ip, u16 port_number_host_byte_order)
+{
+ udp_uri_main_t *um = vnet_get_udp_main ();
+ udp_connection_t *listener;
+
+ pool_get (um->udp_listeners, listener);
+ memset (listener, 0, sizeof (udp_connection_t));
+ listener->c_lcl_port = clib_host_to_net_u16 (port_number_host_byte_order);
+ listener->c_lcl_ip4.as_u32 = ip->ip4.as_u32;
+ listener->c_proto = SESSION_TYPE_IP4_UDP;
+ udp_register_dst_port (um->vlib_main, port_number_host_byte_order,
+ udp4_uri_input_node.index, 1 /* is_ipv4 */ );
+ return 0;
+}
+
+u32
+udp_session_bind_ip6 (vlib_main_t * vm, u32 session_index,
+ ip46_address_t * ip, u16 port_number_host_byte_order)
+{
+ udp_uri_main_t *um = vnet_get_udp_main ();
+ udp_connection_t *listener;
+
+ pool_get (um->udp_listeners, listener);
+ listener->c_lcl_port = clib_host_to_net_u16 (port_number_host_byte_order);
+ clib_memcpy (&listener->c_lcl_ip6, &ip->ip6, sizeof (ip6_address_t));
+ listener->c_proto = SESSION_TYPE_IP6_UDP;
+ udp_register_dst_port (um->vlib_main, port_number_host_byte_order,
+ udp4_uri_input_node.index, 0 /* is_ipv4 */ );
+ return 0;
+}
+
+u32
+udp_session_unbind_ip4 (vlib_main_t * vm, u32 listener_index)
+{
+ udp_connection_t *listener;
+ listener = udp_listener_get (listener_index);
+
+ /* deregister the udp_local mapping */
+ udp_unregister_dst_port (vm, listener->c_lcl_port, 1 /* is_ipv4 */ );
+ return 0;
+}
+
+u32
+udp_session_unbind_ip6 (vlib_main_t * vm, u32 listener_index)
+{
+ udp_connection_t *listener;
+
+ listener = udp_listener_get (listener_index);
+
+ /* deregister the udp_local mapping */
+ udp_unregister_dst_port (vm, listener->c_lcl_port, 0 /* is_ipv4 */ );
+ return 0;
+}
+
+transport_connection_t *
+udp_session_get_listener (u32 listener_index)
+{
+ udp_connection_t *us;
+
+ us = udp_listener_get (listener_index);
+ return &us->connection;
+}
+
+u32
+udp_push_header (transport_connection_t * tconn, vlib_buffer_t * b)
+{
+ udp_connection_t *us;
+ u8 *data;
+ udp_header_t *udp;
+
+ us = (udp_connection_t *) tconn;
+
+ if (tconn->is_ip4)
+ {
+ ip4_header_t *ip;
+
+ data = vlib_buffer_get_current (b);
+ udp = (udp_header_t *) (data - sizeof (udp_header_t));
+ ip = (ip4_header_t *) ((u8 *) udp - sizeof (ip4_header_t));
+
+ /* Build packet header, swap rx key src + dst fields */
+ ip->src_address.as_u32 = us->c_lcl_ip4.as_u32;
+ ip->dst_address.as_u32 = us->c_rmt_ip4.as_u32;
+ ip->ip_version_and_header_length = 0x45;
+ ip->ttl = 254;
+ ip->protocol = IP_PROTOCOL_UDP;
+ ip->length = clib_host_to_net_u16 (b->current_length + sizeof (*udp));
+ ip->checksum = ip4_header_checksum (ip);
+
+ udp->src_port = us->c_lcl_port;
+ udp->dst_port = us->c_rmt_port;
+ udp->length = clib_host_to_net_u16 (b->current_length);
+ udp->checksum = 0;
+
+ b->current_length = sizeof (*ip) + sizeof (*udp);
+ return SESSION_QUEUE_NEXT_IP4_LOOKUP;
+ }
+ else
+ {
+ vlib_main_t *vm = vlib_get_main ();
+ ip6_header_t *ip;
+ u16 payload_length;
+ int bogus = ~0;
+
+ data = vlib_buffer_get_current (b);
+ udp = (udp_header_t *) (data - sizeof (udp_header_t));
+ ip = (ip6_header_t *) ((u8 *) udp - sizeof (ip6_header_t));
+
+ /* Build packet header, swap rx key src + dst fields */
+ clib_memcpy (&ip->src_address, &us->c_lcl_ip6, sizeof (ip6_address_t));
+ clib_memcpy (&ip->dst_address, &us->c_rmt_ip6, sizeof (ip6_address_t));
+
+ ip->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 (0x6 << 28);
+
+ ip->hop_limit = 0xff;
+ ip->protocol = IP_PROTOCOL_UDP;
+
+ payload_length = vlib_buffer_length_in_chain (vm, b);
+ payload_length -= sizeof (*ip);
+
+ ip->payload_length = clib_host_to_net_u16 (payload_length);
+
+ udp->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip, &bogus);
+ ASSERT (!bogus);
+
+ udp->src_port = us->c_lcl_port;
+ udp->dst_port = us->c_rmt_port;
+ udp->length = clib_host_to_net_u16 (b->current_length);
+ udp->checksum = 0;
+
+ b->current_length = sizeof (*ip) + sizeof (*udp);
+
+ return SESSION_QUEUE_NEXT_IP6_LOOKUP;
+ }
+}
+
+transport_connection_t *
+udp_session_get (u32 connection_index, u32 my_thread_index)
+{
+ udp_uri_main_t *um = vnet_get_udp_main ();
+
+ udp_connection_t *us;
+ us =
+ pool_elt_at_index (um->udp_sessions[my_thread_index], connection_index);
+ return &us->connection;
+}
+
+void
+udp_session_close (u32 connection_index, u32 my_thread_index)
+{
+ udp_uri_main_t *um = vnet_get_udp_main ();
+ pool_put_index (um->udp_sessions[my_thread_index], connection_index);
+}
+
+u8 *
+format_udp_session_ip4 (u8 * s, va_list * args)
+{
+ u32 uci = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
+ udp_connection_t *u4;
+
+ u4 = udp_connection_get (uci, thread_index);
+
+ s = format (s, "[%s] %U:%d->%U:%d", "udp", format_ip4_address,
+ &u4->c_lcl_ip4, clib_net_to_host_u16 (u4->c_lcl_port),
+ format_ip4_address, &u4->c_rmt_ip4,
+ clib_net_to_host_u16 (u4->c_rmt_port));
+ return s;
+}
+
+u8 *
+format_udp_session_ip6 (u8 * s, va_list * args)
+{
+ u32 uci = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
+ udp_connection_t *tc = udp_connection_get (uci, thread_index);
+ s = format (s, "[%s] %U:%d->%U:%d", "udp", format_ip6_address,
+ &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip6_address, &tc->c_rmt_ip6,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+u8 *
+format_udp_listener_session_ip4 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ udp_connection_t *tc = udp_listener_get (tci);
+ s = format (s, "[%s] %U:%d->%U:%d", "udp", format_ip4_address,
+ &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip4_address, &tc->c_rmt_ip4,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+u8 *
+format_udp_listener_session_ip6 (u8 * s, va_list * args)
+{
+ u32 tci = va_arg (*args, u32);
+ udp_connection_t *tc = udp_listener_get (tci);
+ s = format (s, "[%s] %U:%d->%U:%d", "udp", format_ip6_address,
+ &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port),
+ format_ip6_address, &tc->c_rmt_ip6,
+ clib_net_to_host_u16 (tc->c_rmt_port));
+ return s;
+}
+
+u16
+udp_send_mss_uri (transport_connection_t * t)
+{
+ /* TODO figure out MTU of output interface */
+ return 400;
+}
+
+u32
+udp_send_space_uri (transport_connection_t * t)
+{
+ /* No constraint on TX window */
+ return ~0;
+}
+
+int
+udp_open_connection (ip46_address_t * addr, u16 port)
+{
+ clib_warning ("Not implemented");
+ return 0;
+}
+
+/* *INDENT-OFF* */
+const static transport_proto_vft_t udp4_proto = {
+ .bind = udp_session_bind_ip4,
+ .open = udp_open_connection,
+ .unbind = udp_session_unbind_ip4,
+ .push_header = udp_push_header,
+ .get_connection = udp_session_get,
+ .get_listener = udp_session_get_listener,
+ .close = udp_session_close,
+ .send_mss = udp_send_mss_uri,
+ .send_space = udp_send_space_uri,
+ .format_connection = format_udp_session_ip4,
+ .format_listener = format_udp_listener_session_ip4
+};
+
+const static transport_proto_vft_t udp6_proto = {
+ .bind = udp_session_bind_ip6,
+ .open = udp_open_connection,
+ .unbind = udp_session_unbind_ip6,
+ .push_header = udp_push_header,
+ .get_connection = udp_session_get,
+ .get_listener = udp_session_get_listener,
+ .close = udp_session_close,
+ .send_mss = udp_send_mss_uri,
+ .send_space = udp_send_space_uri,
+ .format_connection = format_udp_session_ip6,
+ .format_listener = format_udp_listener_session_ip6
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+udp_init (vlib_main_t * vm)
+{
+ udp_uri_main_t *um = vnet_get_udp_main ();
+ ip_main_t *im = &ip_main;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+ u32 num_threads;
+ clib_error_t *error = 0;
+ ip_protocol_info_t *pi;
+
+ um->vlib_main = vm;
+ um->vnet_main = vnet_get_main ();
+
+ if ((error = vlib_call_init_function (vm, ip_main_init)))
+ return error;
+ if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
+ return error;
+ if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
+ return error;
+
+ /*
+ * Registrations
+ */
+
+ /* IP registration */
+ pi = ip_get_protocol_info (im, IP_PROTOCOL_UDP);
+ if (pi == 0)
+ return clib_error_return (0, "UDP protocol info AWOL");
+ pi->format_header = format_udp_header;
+ pi->unformat_pg_edit = unformat_pg_udp_header;
+
+
+ /* Register as transport with URI */
+ session_register_transport (SESSION_TYPE_IP4_UDP, &udp4_proto);
+ session_register_transport (SESSION_TYPE_IP6_UDP, &udp6_proto);
+
+ /*
+ * Initialize data structures
+ */
+
+ num_threads = 1 /* main thread */ + tm->n_threads;
+ vec_validate (um->udp_sessions, num_threads - 1);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (udp_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
/*
- * ip/udp.h: udp protocol
- *
- * Copyright (c) 2013 Cisco and/or its affiliates.
+ * Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-
-#ifndef included_udp_h
-#define included_udp_h
+#ifndef __included_udp_h__
+#define __included_udp_h__
#include <vnet/vnet.h>
-#include <vnet/ip/udp_packet.h>
+#include <vnet/udp/udp_packet.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip4.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/pg/pg.h>
#include <vnet/ip/format.h>
+#include <vnet/ip/ip.h>
+#include <vnet/session/transport.h>
+
+typedef struct
+{
+ transport_connection_t connection; /** must be first */
+
+ /** ersatz MTU to limit fifo pushes to test data size */
+ u32 mtu;
+} udp_connection_t;
+
+typedef struct _udp_uri_main
+{
+ /* Per-worker thread udp connection pools */
+ udp_connection_t **udp_sessions;
+ udp_connection_t *udp_listeners;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+ ip4_main_t *ip4_main;
+ ip6_main_t *ip6_main;
+} udp_uri_main_t;
+
+extern udp_uri_main_t udp_uri_main;
+extern vlib_node_registration_t udp4_uri_input_node;
+
+always_inline udp_uri_main_t *
+vnet_get_udp_main ()
+{
+ return &udp_uri_main;
+}
+
+always_inline udp_connection_t *
+udp_connection_get (u32 conn_index, u32 thread_index)
+{
+ return pool_elt_at_index (udp_uri_main.udp_sessions[thread_index],
+ conn_index);
+}
+
+always_inline udp_connection_t *
+udp_listener_get (u32 conn_index)
+{
+ return pool_elt_at_index (udp_uri_main.udp_listeners, conn_index);
+}
+
typedef enum
{
#define udp_error(n,s) UDP_ERROR_##n,
-#include <vnet/ip/udp_error.def>
+#include <vnet/udp/udp_error.def>
#undef udp_error
UDP_N_ERROR,
} udp_error_t;
udp_dst_port_t dst_port,
u32 node_index, u8 is_ip4);
+void
+udp_unregister_dst_port (vlib_main_t * vm,
+ udp_dst_port_t dst_port, u8 is_ip4);
+
void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
always_inline void
}
}
-#endif /* included_udp_h */
-
/*
* fd.io coding-style-patch-verification: ON
*
* eval: (c-set-style "gnu")
* End:
*/
+
+#endif /* __included_udp_h__ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ip/ip.h>
+
+#include <vnet/udp/udp.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+
+#include <vnet/udp/udp_packet.h>
+
+#include <vlibmemory/api.h>
+#include "../session/application_interface.h"
+
+vlib_node_registration_t udp4_uri_input_node;
+
+typedef struct
+{
+ u32 session;
+ u32 disposition;
+ u32 thread_index;
+} udp4_uri_input_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_udp4_uri_input_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ udp4_uri_input_trace_t *t = va_arg (*args, udp4_uri_input_trace_t *);
+
+ s = format (s, "UDP4_URI_INPUT: session %d, disposition %d, thread %d",
+ t->session, t->disposition, t->thread_index);
+ return s;
+}
+
+typedef enum
+{
+ UDP4_URI_INPUT_NEXT_DROP,
+ UDP4_URI_INPUT_N_NEXT,
+} udp4_uri_input_next_t;
+
+static char *udp4_uri_input_error_strings[] = {
+#define _(sym,string) string,
+ foreach_session_input_error
+#undef _
+};
+
+static uword
+udp4_uri_input_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ udp4_uri_input_next_t next_index;
+ udp_uri_main_t *um = vnet_get_udp_main ();
+ session_manager_main_t *smm = vnet_get_session_manager_main ();
+ u32 my_thread_index = vm->cpu_index;
+ u8 my_enqueue_epoch;
+ u32 *session_indices_to_enqueue;
+ static u32 serial_number;
+ int i;
+
+ my_enqueue_epoch = ++smm->current_enqueue_epoch[my_thread_index];
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = UDP4_URI_INPUT_NEXT_DROP;
+ u32 error0 = SESSION_ERROR_ENQUEUED;
+ udp_header_t *udp0;
+ ip4_header_t *ip0;
+ stream_session_t *s0;
+ svm_fifo_t *f0;
+ u16 udp_len0;
+ u8 *data0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ /* udp_local hands us a pointer to the udp data */
+
+ data0 = vlib_buffer_get_current (b0);
+ udp0 = (udp_header_t *) (data0 - sizeof (*udp0));
+
+ /* $$$$ fixme: udp_local doesn't do ip options correctly anyhow */
+ ip0 = (ip4_header_t *) (((u8 *) udp0) - sizeof (*ip0));
+ s0 = 0;
+
+ /* lookup session */
+ s0 = stream_session_lookup4 (&ip0->dst_address, &ip0->src_address,
+ udp0->dst_port, udp0->src_port,
+ SESSION_TYPE_IP4_UDP, my_thread_index);
+
+ /* no listener */
+ if (PREDICT_FALSE (s0 == 0))
+ {
+ error0 = SESSION_ERROR_NO_LISTENER;
+ goto trace0;
+ }
+
+ f0 = s0->server_rx_fifo;
+
+ /* established hit */
+ if (PREDICT_TRUE (s0->session_state == SESSION_STATE_READY))
+ {
+ udp_len0 = clib_net_to_host_u16 (udp0->length);
+
+ if (PREDICT_FALSE (udp_len0 > svm_fifo_max_enqueue (f0)))
+ {
+ error0 = SESSION_ERROR_FIFO_FULL;
+ goto trace0;
+ }
+
+ svm_fifo_enqueue_nowait (f0, 0 /* pid */ ,
+ udp_len0 - sizeof (*udp0),
+ (u8 *) (udp0 + 1));
+
+ b0->error = node->errors[SESSION_ERROR_ENQUEUED];
+
+ /* We need to send an RX event on this fifo */
+ if (s0->enqueue_epoch != my_enqueue_epoch)
+ {
+ s0->enqueue_epoch = my_enqueue_epoch;
+
+ vec_add1 (smm->session_indices_to_enqueue_by_thread
+ [my_thread_index],
+ s0 - smm->sessions[my_thread_index]);
+ }
+ }
+ /* listener hit */
+ else if (s0->session_state == SESSION_STATE_LISTENING)
+ {
+ udp_connection_t *us;
+ int rv;
+
+ error0 = SESSION_ERROR_NOT_READY;
+
+ /*
+ * create udp transport session
+ */
+ pool_get (um->udp_sessions[my_thread_index], us);
+
+ us->mtu = 1024; /* $$$$ policy */
+
+ us->c_lcl_ip4.as_u32 = ip0->dst_address.as_u32;
+ us->c_rmt_ip4.as_u32 = ip0->src_address.as_u32;
+ us->c_lcl_port = udp0->dst_port;
+ us->c_rmt_port = udp0->src_port;
+ us->c_proto = SESSION_TYPE_IP4_UDP;
+ us->c_c_index = us - um->udp_sessions[my_thread_index];
+
+ /*
+ * create stream session and attach the udp session to it
+ */
+ rv = stream_session_accept (&us->connection, s0->session_index,
+ SESSION_TYPE_IP4_UDP,
+ 1 /*notify */ );
+ if (rv)
+ error0 = rv;
+
+ }
+ else
+ {
+
+ error0 = SESSION_ERROR_NOT_READY;
+ goto trace0;
+ }
+
+ trace0:
+ b0->error = node->errors[error0];
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ udp4_uri_input_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+
+ t->session = ~0;
+ if (s0)
+ t->session = s0 - smm->sessions[my_thread_index];
+ t->disposition = error0;
+ t->thread_index = my_thread_index;
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ /* Send enqueue events */
+
+ session_indices_to_enqueue =
+ smm->session_indices_to_enqueue_by_thread[my_thread_index];
+
+ for (i = 0; i < vec_len (session_indices_to_enqueue); i++)
+ {
+ session_fifo_event_t evt;
+ unix_shared_memory_queue_t *q;
+ stream_session_t *s0;
+ application_t *server0;
+
+ /* Get session */
+ s0 = pool_elt_at_index (smm->sessions[my_thread_index],
+ session_indices_to_enqueue[i]);
+
+ /* Get session's server */
+ server0 = application_get (s0->app_index);
+
+ /* Built-in server? Deliver the goods... */
+ if (server0->cb_fns.builtin_server_rx_callback)
+ {
+ server0->cb_fns.builtin_server_rx_callback (s0);
+ continue;
+ }
+
+ /* Fabricate event */
+ evt.fifo = s0->server_rx_fifo;
+ evt.event_type = FIFO_EVENT_SERVER_RX;
+ evt.event_id = serial_number++;
+ evt.enqueue_length = svm_fifo_max_dequeue (s0->server_rx_fifo);
+
+ /* Add event to server's event queue */
+ q = server0->event_queue;
+
+ /* Don't block for lack of space */
+ if (PREDICT_TRUE (q->cursize < q->maxsize))
+ unix_shared_memory_queue_add (server0->event_queue, (u8 *) & evt,
+ 0 /* do wait for mutex */ );
+ else
+ {
+ vlib_node_increment_counter (vm, udp4_uri_input_node.index,
+ SESSION_ERROR_FIFO_FULL, 1);
+ }
+ if (1)
+ {
+ ELOG_TYPE_DECLARE (e) =
+ {
+ .format = "evt-enqueue: id %d length %d",.format_args = "i4i4",};
+ struct
+ {
+ u32 data[2];
+ } *ed;
+ ed = ELOG_DATA (&vlib_global_main.elog_main, e);
+ ed->data[0] = evt.event_id;
+ ed->data[1] = evt.enqueue_length;
+ }
+ }
+
+ vec_reset_length (session_indices_to_enqueue);
+
+ smm->session_indices_to_enqueue_by_thread[my_thread_index] =
+ session_indices_to_enqueue;
+
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (udp4_uri_input_node) =
+{
+ .function = udp4_uri_input_node_fn,.name = "udp4-uri-input",.vector_size =
+ sizeof (u32),.format_trace = format_udp4_uri_input_trace,.type =
+ VLIB_NODE_TYPE_INTERNAL,.n_errors =
+ ARRAY_LEN (udp4_uri_input_error_strings),.error_strings =
+ udp4_uri_input_error_strings,.n_next_nodes = UDP4_URI_INPUT_N_NEXT,
+ /* edit / add dispositions here */
+ .next_nodes =
+ {
+ [UDP4_URI_INPUT_NEXT_DROP] = "error-drop",}
+,};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
#include <vlib/vlib.h>
#include <vnet/pg/pg.h>
-#include <vnet/ip/udp.h>
-#include <vnet/ip/udp_packet.h>
+#include <vnet/udp/udp.h>
+#include <vnet/udp/udp_packet.h>
#include <vppinfra/sparse_vec.h>
udp_main_t udp_main;
n[0] = pi->next_index;
}
+void
+udp_unregister_dst_port (vlib_main_t * vm, udp_dst_port_t dst_port, u8 is_ip4)
+{
+ udp_main_t *um = &udp_main;
+ udp_dst_port_info_t *pi;
+ udp_input_runtime_t *rt;
+ u16 *n;
+
+ pi = udp_get_dst_port_info (um, dst_port, is_ip4);
+ /* Not registered? Fagedaboudit */
+ if (!pi)
+ return;
+
+ /* Kill the mapping. Don't bother killing the pi, it may be back. */
+ rt = vlib_node_get_runtime_data
+ (vm, is_ip4 ? udp4_input_node.index : udp6_input_node.index);
+ n = sparse_vec_validate (rt->next_by_dst_port,
+ clib_host_to_net_u16 (dst_port));
+ n[0] = SPARSE_VEC_INVALID_INDEX;
+}
+
void
udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add)
{
#include <vnet/lisp-cp/lisp.api.h>
#include <vnet/lisp-gpe/lisp_gpe.api.h>
#include <vnet/lisp-cp/one.api.h>
+#include <vnet/session/session.api.h>
#include <vnet/mpls/mpls.api.h>
#include <vnet/sr/sr.api.h>
#include <vnet/classify/classify.api.h>
#include <vnet/vxlan-gpe/vxlan_gpe_packet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
/**
* @brief VXLAN GPE header struct
#include <vnet/vxlan/vxlan_packet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
-#include <vnet/ip/udp.h>
+#include <vnet/udp/udp.h>
#include <vnet/dpo/dpo.h>
#include <vnet/adj/adj_types.h>
* IPSEC-GRE APIs: see .../src/vnet/ipsec-gre/{ipsec_gre.api, ipsec_gre_api.c}
* LISP APIs: see .../src/vnet/lisp/{lisp.api, lisp_api.c}
* LISP-GPE APIs: see .../src/vnet/lisp-gpe/{lisp_gpe.api, lisp_gpe_api.c}
+ * SESSION APIs: .../vnet/session/{session.api session_api.c}
* MPLS APIs: see .../src/vnet/mpls/{mpls.api, mpls_api.c}
* SR APIs: see .../src/vnet/sr/{sr.api, sr_api.c}
* DPDK APIs: see ... /src/vnet/devices/dpdk/{dpdk.api, dpdk_api.c}
vppinfra/asm_mips.h \
vppinfra/asm_x86.h \
vppinfra/bihash_8_8.h \
+ vppinfra/bihash_16_8.h \
vppinfra/bihash_24_8.h \
+ vppinfra/bihash_48_8.h \
vppinfra/bihash_template.h \
vppinfra/bihash_template.c \
vppinfra/bitmap.h \
vppinfra/timer.h \
vppinfra/tw_timer_2t_1w_2048sl.h \
vppinfra/tw_timer_16t_2w_512sl.h \
+ vppinfra/tw_timer_16t_1w_2048sl.h \
vppinfra/tw_timer_template.h \
vppinfra/tw_timer_template.c \
vppinfra/types.h \
vppinfra/tw_timer_2t_1w_2048sl.c \
vppinfra/tw_timer_16t_2w_512sl.h \
vppinfra/tw_timer_16t_2w_512sl.c \
+ vppinfra/tw_timer_16t_1w_2048sl.h \
+ vppinfra/tw_timer_16t_1w_2048sl.c \
vppinfra/unformat.c \
vppinfra/vec.c \
vppinfra/vector.c \
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#undef BIHASH_TYPE
+
+#define BIHASH_TYPE _16_8
+#define BIHASH_KVP_PER_PAGE 4
+
+#ifndef __included_bihash_16_8_h__
+#define __included_bihash_16_8_h__
+
+#include <vppinfra/heap.h>
+#include <vppinfra/format.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/xxhash.h>
+
+typedef struct
+{
+ u64 key[2];
+ u64 value;
+} clib_bihash_kv_16_8_t;
+
+static inline int
+clib_bihash_is_free_16_8 (clib_bihash_kv_16_8_t * v)
+{
+ /* Free values are memset to 0xff, check a bit... */
+ if (v->key[0] == ~0ULL && v->value == ~0ULL)
+ return 1;
+ return 0;
+}
+
+#if __SSE4_2__
+#ifndef __defined_crc_u32__
+#define __defined_crc_u32__
+static inline u32
+crc_u32 (u32 data, u32 value)
+{
+ __asm__ volatile ("crc32l %[data], %[value];":[value] "+r" (value):[data]
+ "rm" (data));
+ return value;
+}
+#endif /* __defined_crc_u32__ */
+
+static inline u64
+clib_bihash_hash_16_8 (clib_bihash_kv_16_8_t * v)
+{
+ u32 *dp = (u32 *) & v->key[0];
+ u32 value = 0;
+
+ value = crc_u32 (dp[0], value);
+ value = crc_u32 (dp[1], value);
+ value = crc_u32 (dp[2], value);
+ value = crc_u32 (dp[3], value);
+
+ return value;
+}
+#else
+static inline u64
+clib_bihash_hash_16_8 (clib_bihash_kv_16_8_t * v)
+{
+ u64 tmp = v->key[0] ^ v->key[1];
+ return clib_xxhash (tmp);
+}
+#endif
+
+static inline u8 *
+format_bihash_kvp_16_8 (u8 * s, va_list * args)
+{
+ clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *);
+
+ s = format (s, "key %llu %llu value %llu", v->key[0], v->key[1], v->value);
+ return s;
+}
+
+static inline int
+clib_bihash_key_compare_16_8 (u64 * a, u64 * b)
+{
+ return ((a[0] ^ b[0]) | (a[1] ^ b[1])) == 0;
+}
+
+#undef __included_bihash_template_h__
+#include <vppinfra/bihash_template.h>
+
+#endif /* __included_bihash_16_8_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef BIHASH_TYPE
+
+#define BIHASH_TYPE _48_8
+#define BIHASH_KVP_PER_PAGE 4
+
+#ifndef __included_bihash_48_8_h__
+#define __included_bihash_48_8_h__
+
+#include <vppinfra/heap.h>
+#include <vppinfra/format.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/xxhash.h>
+
+typedef struct
+{
+ u64 key[6];
+ u64 value;
+} clib_bihash_kv_48_8_t;
+
+static inline int
+clib_bihash_is_free_48_8 (const clib_bihash_kv_48_8_t * v)
+{
+ /* Free values are memset to 0xff, check a bit... */
+ if (v->key[0] == ~0ULL && v->value == ~0ULL)
+ return 1;
+ return 0;
+}
+
+#if __SSE4_2__
+#ifndef __defined_crc_u32__
+#define __defined_crc_u32__
+static inline u32
+crc_u32 (u32 data, u32 value)
+{
+ __asm__ volatile ("crc32l %[data], %[value];":[value] "+r" (value):[data]
+ "rm" (data));
+ return value;
+}
+#endif /* __defined_crc_u32__ */
+
+static inline u64
+clib_bihash_hash_48_8 (const clib_bihash_kv_48_8_t * v)
+{
+ const u32 *dp = (const u32 *) &v->key[0];
+ u32 value = 0;
+
+ value = crc_u32 (dp[0], value);
+ value = crc_u32 (dp[1], value);
+ value = crc_u32 (dp[2], value);
+ value = crc_u32 (dp[3], value);
+ value = crc_u32 (dp[4], value);
+ value = crc_u32 (dp[5], value);
+ value = crc_u32 (dp[6], value);
+ value = crc_u32 (dp[7], value);
+ value = crc_u32 (dp[8], value);
+ value = crc_u32 (dp[9], value);
+ value = crc_u32 (dp[10], value);
+ value = crc_u32 (dp[11], value);
+
+ return value;
+}
+#else
+static inline u64
+clib_bihash_hash_48_8 (const clib_bihash_kv_48_8_t * v)
+{
+ u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4]
+ ^ v->key[5];
+ return clib_xxhash (tmp);
+}
+#endif
+
+static inline u8 *
+format_bihash_kvp_48_8 (u8 * s, va_list * args)
+{
+ clib_bihash_kv_48_8_t *v = va_arg (*args, clib_bihash_kv_48_8_t *);
+
+ s = format (s, "key %llu %llu %llu %llu %llu %llu value %llu", v->key[0],
+ v->key[1], v->key[2], v->key[3], v->key[4], v->key[5],
+ v->value);
+ return s;
+}
+
+static inline int
+clib_bihash_key_compare_48_8 (const u64 * a, const u64 * b)
+{
+ return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
+ | (a[4] ^ b[4]) | (a[5] ^ b[5])) == 0;
+}
+
+#undef __included_bihash_template_h__
+#include <vppinfra/bihash_template.h>
+
+#endif /* __included_bihash_48_8_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vppinfra/error.h>
+#include "tw_timer_16t_1w_2048sl.h"
+#include "tw_timer_template.c"
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __included_tw_timer_16t_2w_512sl_h__
+#define __included_tw_timer_16t_2w_512sl_h__
+
+/* ... So that a client app can create multiple wheel geometries */
+#undef TW_TIMER_WHEELS
+#undef TW_SLOTS_PER_RING
+#undef TW_RING_SHIFT
+#undef TW_RING_MASK
+#undef TW_TIMERS_PER_OBJECT
+#undef LOG2_TW_TIMERS_PER_OBJECT
+#undef TW_SUFFIX
+
+#define TW_TIMER_WHEELS 1
+#define TW_SLOTS_PER_RING 2048
+#define TW_RING_SHIFT 11
+#define TW_RING_MASK (TW_SLOTS_PER_RING -1)
+#define TW_TIMERS_PER_OBJECT 16
+#define LOG2_TW_TIMERS_PER_OBJECT 4
+#define TW_SUFFIX _16t_1w_2048sl
+
+#include <vppinfra/tw_timer_template.h>
+
+#endif /* __included_tw_timer_16t_2w_512sl_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / commitdiff