+++ /dev/null
-/*
- * l2_node.c - l2 ipfix-per-packet graph node
- *
- * Copyright (c) <current-year> <your-organization>
- * 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 <flowperpkt/flowperpkt.h>
-
-/**
- * @file l2 flow record generator graph node
- */
-
-typedef struct
-{
- /** interface handle */
- u32 rx_sw_if_index;
- u32 tx_sw_if_index;
- /** src and dst L2 addresses */
- u8 src_mac[6];
- u8 dst_mac[6];
- /** Ethertype */
- u16 ethertype;
- /** packet timestamp */
- u64 timestamp;
- /** size of the buffer */
- u16 buffer_size;
-} flowperpkt_l2_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_flowperpkt_l2_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 *);
- flowperpkt_l2_trace_t *t = va_arg (*args, flowperpkt_l2_trace_t *);
-
- s = format (s,
- "FLOWPERPKT-L2: rx_sw_if_index %d, tx_sw_if_index %d, src %U dst %U ethertype %0x2, timestamp %lld, size %d",
- t->rx_sw_if_index, t->tx_sw_if_index,
- format_ethernet_address, &t->src_mac,
- format_ethernet_address, &t->dst_mac,
- t->ethertype, t->timestamp, t->buffer_size);
- return s;
-}
-
-vlib_node_registration_t flowperpkt_l2_node;
-
-/* No counters at the moment */
-#define foreach_flowperpkt_l2_error
-
-typedef enum
-{
-#define _(sym,str) FLOWPERPKT_ERROR_##sym,
- foreach_flowperpkt_l2_error
-#undef _
- FLOWPERPKT_N_ERROR,
-} flowperpkt_l2_error_t;
-
-static char *flowperpkt_l2_error_strings[] = {
-#define _(sym,string) string,
- foreach_flowperpkt_l2_error
-#undef _
-};
-
-typedef enum
-{
- FLOWPERPKT_L2_NEXT_DROP,
- FLOWPERPKT_L2_NEXT_IP4_LOOKUP,
- FLOWPERPKT_L2_N_NEXT,
-} flowperpkt_l2_next_t;
-
-/**
- * @brief add an entry to the flow record under construction
- * @param vm vlib_main_t * current worker thread main structure pointer
- * @param fm flowperpkt_main_t * flow-per-packet main structure pointer
- * @param sw_if_index u32 interface handle
- * @param tos u8 ToS bits from the packet
- * @param timestamp u64 timestamp, nanoseconds since 1/1/70
- * @param length u16 ip length of the packet
- * @param do_flush int 1 = flush all cached records, 0 = construct a record
- */
-
-static inline void
-add_to_flow_record_l2 (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- flowperpkt_main_t * fm,
- u32 rx_sw_if_index, u32 tx_sw_if_index,
- u8 * src_mac, u8 * dst_mac,
- u16 ethertype, u64 timestamp, u16 length, int do_flush)
-{
- u32 my_thread_index = vm->thread_index;
- flow_report_main_t *frm = &flow_report_main;
- ip4_header_t *ip;
- udp_header_t *udp;
- ip4_ipfix_template_packet_t *tp;
- ipfix_message_header_t *h;
- ipfix_set_header_t *s;
- vlib_frame_t *f;
- vlib_buffer_t *b0;
- u16 offset;
- u32 bi0;
- vlib_buffer_free_list_t *fl;
-
- /* Find or allocate a buffer */
- b0 = fm->l2_buffers_per_worker[my_thread_index];
-
- /* Need to allocate a buffer? */
- if (PREDICT_FALSE (b0 == 0))
- {
- /* Nothing to flush */
- if (do_flush)
- return;
-
- /* $$$$ drop counter? */
- if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
- return;
-
- /* Initialize the buffer */
- b0 = fm->l2_buffers_per_worker[my_thread_index] =
- vlib_get_buffer (vm, bi0);
- fl =
- vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
- vlib_buffer_init_for_free_list (b0, fl);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
- offset = 0;
- }
- else
- {
- /* use the current buffer */
- bi0 = vlib_get_buffer_index (vm, b0);
- offset = fm->l2_next_record_offset_per_worker[my_thread_index];
- }
-
- /* Find or allocate a frame */
- f = fm->l2_frames_per_worker[my_thread_index];
- if (PREDICT_FALSE (f == 0))
- {
- u32 *to_next;
- f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
- fm->l2_frames_per_worker[my_thread_index] = f;
-
- /* Enqueue the buffer */
- to_next = vlib_frame_vector_args (f);
- to_next[0] = bi0;
- f->n_vectors = 1;
- }
-
- /* Fresh packet, construct header */
- if (PREDICT_FALSE (offset == 0))
- {
- flow_report_stream_t *stream;
-
- stream = &frm->streams[0];
-
- b0->current_data = 0;
- b0->current_length = sizeof (*ip) + sizeof (*udp) + sizeof (*h) +
- sizeof (*s);
- b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VLIB_BUFFER_FLOW_REPORT);
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
-
- tp = vlib_buffer_get_current (b0);
- ip = (ip4_header_t *) & tp->ip4;
- udp = (udp_header_t *) (ip + 1);
- h = (ipfix_message_header_t *) (udp + 1);
- s = (ipfix_set_header_t *) (h + 1);
-
- ip->ip_version_and_header_length = 0x45;
- ip->ttl = 254;
- ip->protocol = IP_PROTOCOL_UDP;
- ip->flags_and_fragment_offset = 0;
- ip->src_address.as_u32 = frm->src_address.as_u32;
- ip->dst_address.as_u32 = frm->ipfix_collector.as_u32;
- udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
- udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
- udp->checksum = 0;
-
- /* FIXUP: message header export_time */
- h->export_time = (u32)
- (((f64) frm->unix_time_0) +
- (vlib_time_now (frm->vlib_main) - frm->vlib_time_0));
- h->export_time = clib_host_to_net_u32 (h->export_time);
- h->domain_id = clib_host_to_net_u32 (stream->domain_id);
-
- /* FIXUP: message header sequence_number */
- h->sequence_number = stream->sequence_number++;
- h->sequence_number = clib_host_to_net_u32 (h->sequence_number);
-
- offset = (u32) (((u8 *) (s + 1)) - (u8 *) tp);
- }
-
- /* Add data, unless we're flushing stale data */
- if (PREDICT_TRUE (do_flush == 0))
- {
-
- /* Add data */
- /* Ingress interface */
- {
- u32 ingress_interface = clib_host_to_net_u32 (rx_sw_if_index);
- clib_memcpy (b0->data + offset, &ingress_interface,
- sizeof (ingress_interface));
- offset += sizeof (ingress_interface);
- }
- /* Egress interface */
- {
- u32 egress_interface = clib_host_to_net_u32 (tx_sw_if_index);
- clib_memcpy (b0->data + offset, &egress_interface,
- sizeof (egress_interface));
- offset += sizeof (egress_interface);
- }
- /* src mac address */
- {
- clib_memcpy (b0->data + offset, src_mac, 6);
- offset += 6;
- }
- /* dst mac address */
- {
- clib_memcpy (b0->data + offset, dst_mac, 6);
- offset += 6;
- }
-
- /* ethertype */
- b0->data[offset++] = ethertype >> 8;
- b0->data[offset++] = ethertype & 0xFF;
-
- /* Timestamp */
- clib_memcpy (b0->data + offset, ×tamp, sizeof (f64));
- offset += sizeof (f64);
-
- /* pkt size */
- {
- u16 pkt_size = clib_host_to_net_u16 (length);
- clib_memcpy (b0->data + offset, &pkt_size, sizeof (pkt_size));
- offset += sizeof (pkt_size);
- }
-
- b0->current_length +=
- /* 2*sw_if_index + 2*mac + ethertype + timestamp + length = 32 */
- 2 * sizeof (u32) + 12 + sizeof (u16) + sizeof (f64) + sizeof (u16);
-
- }
- /* Time to flush the buffer? */
- if (PREDICT_FALSE
- (do_flush || (offset + 2 * sizeof (u32) + 12 + sizeof (u16) +
- +sizeof (f64) + sizeof (u16)) > frm->path_mtu))
- {
- tp = vlib_buffer_get_current (b0);
- ip = (ip4_header_t *) & tp->ip4;
- udp = (udp_header_t *) (ip + 1);
- h = (ipfix_message_header_t *) (udp + 1);
- s = (ipfix_set_header_t *) (h + 1);
-
- s->set_id_length = ipfix_set_id_length (fm->l2_report_id,
- b0->current_length -
- (sizeof (*ip) + sizeof (*udp) +
- sizeof (*h)));
- h->version_length = version_length (b0->current_length -
- (sizeof (*ip) + sizeof (*udp)));
-
- ip->length = clib_host_to_net_u16 (b0->current_length);
-
- ip->checksum = ip4_header_checksum (ip);
- udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
-
- if (frm->udp_checksum)
- {
- /* RFC 7011 section 10.3.2. */
- udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
- if (udp->checksum == 0)
- udp->checksum = 0xffff;
- }
-
- ASSERT (ip->checksum == ip4_header_checksum (ip));
-
- if (PREDICT_FALSE (vlib_get_trace_count (vm, node) > 0))
- {
- vlib_trace_buffer (vm, node, FLOWPERPKT_L2_NEXT_IP4_LOOKUP, b0,
- 0 /* follow chain */ );
- flowperpkt_l2_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- memset (t, 0, sizeof (*t));
- t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- t->buffer_size = b0->current_length;
- }
-
- vlib_put_frame_to_node (vm, ip4_lookup_node.index,
- fm->l2_frames_per_worker[my_thread_index]);
- fm->l2_frames_per_worker[my_thread_index] = 0;
- fm->l2_buffers_per_worker[my_thread_index] = 0;
- offset = 0;
- }
-
- fm->l2_next_record_offset_per_worker[my_thread_index] = offset;
-}
-
-void
-flowperpkt_flush_callback_l2 (void)
-{
- vlib_main_t *vm = vlib_get_main ();
- flowperpkt_main_t *fm = &flowperpkt_main;
- vlib_node_runtime_t *node;
- node = vlib_node_get_runtime (vm, flowperpkt_l2_node.index);
-
- add_to_flow_record_l2 (vm, node, fm, 0 /* rx_sw_if_index */ ,
- 0 /* tx_sw_if_index */ ,
- 0 /* src mac */ ,
- 0 /* dst mac */ ,
- 0 /* ethertype */ ,
- 0ULL /* timestamp */ ,
- 0 /* length */ ,
- 1 /* do_flush */ );
-}
-
-
-static uword
-flowperpkt_l2_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- flowperpkt_l2_next_t next_index;
- flowperpkt_main_t *fm = &flowperpkt_main;
- u64 now;
-
- now = (u64) ((vlib_time_now (vm) - fm->vlib_time_0) * 1e9);
- now += fm->nanosecond_time_0;
-
- 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 >= 4 && n_left_to_next >= 2)
- {
- u32 next0 = FLOWPERPKT_L2_NEXT_DROP;
- u32 next1 = FLOWPERPKT_L2_NEXT_DROP;
- ethernet_header_t *eh0, *eh1;
- u16 len0, len1;
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->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];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX],
- &next0, b0);
- vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_TX],
- &next1, b1);
-
- eh0 = vlib_buffer_get_current (b0);
- len0 = vlib_buffer_length_in_chain (vm, b0);
-
- if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
- add_to_flow_record_l2 (vm, node, fm,
- vnet_buffer (b0)->sw_if_index[VLIB_RX],
- vnet_buffer (b0)->sw_if_index[VLIB_TX],
- eh0->src_address,
- eh0->dst_address,
- eh0->type, now, len0, 0 /* flush */ );
-
- eh1 = vlib_buffer_get_current (b0);
- len1 = vlib_buffer_length_in_chain (vm, b0);
-
- if (PREDICT_TRUE ((b1->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
- add_to_flow_record_l2 (vm, node, fm,
- vnet_buffer (b1)->sw_if_index[VLIB_RX],
- vnet_buffer (b1)->sw_if_index[VLIB_TX],
- eh1->src_address,
- eh1->dst_address,
- eh1->type, now, len1, 0 /* flush */ );
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
- {
- if (b0->flags & VLIB_BUFFER_IS_TRACED)
- {
- flowperpkt_l2_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- clib_memcpy (t->src_mac, eh0->src_address, 6);
- clib_memcpy (t->dst_mac, eh0->dst_address, 6);
- t->ethertype = clib_net_to_host_u16 (eh0->type);
- t->timestamp = now;
- t->buffer_size = len0;
- }
- if (b1->flags & VLIB_BUFFER_IS_TRACED)
- {
- flowperpkt_l2_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->rx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
- t->tx_sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
- clib_memcpy (t->src_mac, eh1->src_address, 6);
- clib_memcpy (t->dst_mac, eh1->dst_address, 6);
- t->ethertype = clib_net_to_host_u16 (eh1->type);
- t->timestamp = now;
- t->buffer_size = len1;
- }
- }
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0 = FLOWPERPKT_L2_NEXT_DROP;
- ethernet_header_t *eh0;
- u16 len0;
-
- /* 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_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_TX],
- &next0, b0);
-
- eh0 = vlib_buffer_get_current (b0);
- len0 = vlib_buffer_length_in_chain (vm, b0);
-
- if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_FLOW_REPORT) == 0))
- add_to_flow_record_l2 (vm, node, fm,
- vnet_buffer (b0)->sw_if_index[VLIB_RX],
- vnet_buffer (b0)->sw_if_index[VLIB_TX],
- eh0->src_address,
- eh0->dst_address,
- eh0->type, now, len0, 0 /* flush */ );
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- flowperpkt_l2_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- t->tx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- clib_memcpy (t->src_mac, eh0->src_address, 6);
- clib_memcpy (t->dst_mac, eh0->dst_address, 6);
- t->ethertype = clib_net_to_host_u16 (eh0->type);
- t->timestamp = now;
- t->buffer_size = len0;
- }
-
- /* 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);
- }
- return frame->n_vectors;
-}
-
-/**
- * @brief IPFIX l2 flow-per-packet graph node
- * @node flowperpkt-l2
- *
- * This is the IPFIX flow-record-per-packet node.
- *
- * @param vm vlib_main_t corresponding to the current thread.
- * @param node vlib_node_runtime_t data for this node.
- * @param frame vlib_frame_t whose contents should be dispatched.
- *
- * @par Graph mechanics: buffer metadata, next index usage
- *
- * <em>Uses:</em>
- * - <code>vnet_buffer(b)->ip.save_rewrite_length</code>
- * - tells the node the length of the rewrite which was applied in
- * ip4/6_rewrite_inline, allows the code to find the IP header without
- * having to parse L2 headers, or make stupid assumptions about their
- * length.
- * - <code>vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT</code>
- * - Used to suppress flow record generation for flow record packets.
- *
- * <em>Sets:</em>
- * - <code>vnet_buffer(b)->flags & VLIB_BUFFER_FLOW_REPORT</code>
- * - To suppress flow record generation for flow record packets
- *
- * <em>Next Index:</em>
- * - Next configured output feature on the interface, usually
- * "interface-output." Generated flow records head for ip4-lookup
- */
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (flowperpkt_l2_node) = {
- .function = flowperpkt_l2_node_fn,
- .name = "flowperpkt-l2",
- .vector_size = sizeof (u32),
- .format_trace = format_flowperpkt_l2_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(flowperpkt_l2_error_strings),
- .error_strings = flowperpkt_l2_error_strings,
-
- .n_next_nodes = FLOWPERPKT_L2_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [FLOWPERPKT_L2_NEXT_DROP] = "error-drop",
- [FLOWPERPKT_L2_NEXT_IP4_LOOKUP] = "ip4-lookup",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff