sudo apt-get update; \
sudo apt-get $(CONFIRM) $(FORCE) install $$inst; \
fi
-else ifneq ("$(wildcard /etc/redhat-release)","")
- @sudo yum install $(CONFIRM) $(DOC_RPM_DEPENDS)
endif
.PHONY: spell
# -- Project information -----------------------------------------------------
project = u'The Vector Packet Processor'
-copyright = u'2018-2021, Linux Foundation'
+copyright = u'2018-2022, Linux Foundation'
author = u'FD.io VPP Community'
# The short X.Y version
+++ /dev/null
-../../../extras/libmemif/examples/example_setup_doc.rst
\ No newline at end of file
libmemif_doc
buildinstructions_doc
- example_setup_doc
- examples_doc
gettingstarted_doc
+ examples_doc
FROM ubuntu:xenial
RUN apt-get update && \
- apt-get install -y git build-essential autoconf pkg-config libtool sudo check
+ apt-get install -y git build-essential autoconf pkg-config libtool sudo
RUN rm -rf /var/lib/apt/lists/*
RUN mkdir /libmemif
ADD . /libmemif
WORKDIR /libmemif
-RUN ./bootstrap
-RUN ./configure
+RUN mkdir build
+RUN cmake ..
+WORKDIR /libmemif/build
RUN make
-RUN make install
RUN mkdir /run/vpp
RUN ulimit -c unlimited
-CMD ./.libs/icmpr-epoll
+CMD ./examples/icmp_responder
::
- # sudo apt-get install -y git cmake autoconf pkg_config libtool
+ sudo apt-get install -y git cmake autoconf pkg_config libtool
Libmemif is now part of VPP repository. Follow fd.io wiki to pull source
code from VPP repository.
https://wiki.fd.io/view/VPP/Pulling,_Building,_Running,_Hacking_and_Pushing_VPP_Code#Pushing_Patches
-Libmemif is located under extras/libmemif. From extras/libmemif:
+Libmemif is located under extras/libmemif. From the vpp workspace root directory::
-::
-
- # mkdir build
- # cd build
- # cmake ..
- # make install
+ mkdir -p extras/libmemif/build
+ cd extras/libmemif/build
+ cmake ..
+ make install
Verify installation:
--------------------
::
- build# ./examples/icmp_responder -?
-
-Use ``-?`` flag to display help:
-
-::
-
- LIBMEMIF EXAMPLE APP: icmp_responder_example
- ==============================
- libmemif version: 4.0, memif version: 2.0
- ==============================
- In this example, memif endpoint connects to an external application.
- The example application can resolve ARP and reply to ICMPv4 packets.
- The program will exit once the interface is disconnected.
- ==============================
- Usage: icmp_responder [OPTIONS]
-
- Options:
- -r Interface role <slave|master>. Default: slave
- -s Socket path. Supports abstract socket using @ before the path. Default: /run/vpp/memif.sock
- -i Interface id. Default: 0
- -a IPv4 address. Default: 192.168.1.1
- -h Mac address. Default: aa:aa:aa:aa:aa:aa
- -? Show help and exit.
- -v Show libmemif and memif version information and exit.
-
-Examples
---------
-
-Once the library is built/installed, refer to :ref:`libmemif_examples_doc`
-and :ref:`libmemif_gettingstarted_doc` for additional information on basic
-use cases and API usage.
+ ./examples/icmp_responder -?
+
+Use ``-?`` flag to display help::
+
+ LIBMEMIF EXAMPLE APP: icmp_responder_example
+ ==============================
+ libmemif version: 4.0, memif version: 2.0
+ ==============================
+ In this example, memif endpoint connects to an external application.
+ The example application can resolve ARP and reply to ICMPv4 packets.
+ The program will exit once the interface is disconnected.
+ ==============================
+ Usage: icmp_responder [OPTIONS]
+
+ Options:
+ -r Interface role <slave|master>. Default: slave
+ -s Socket path. Supports abstract socket using @ before the path. Default: /run/vpp/memif.sock
+ -i Interface id. Default: 0
+ -a IPv4 address. Default: 192.168.1.1
+ -h Mac address. Default: aa:aa:aa:aa:aa:aa
+ -? Show help and exit.
+ -v Show libmemif and memif version information and exit.
+
+Use Cases
+---------
+
+Once the library is built/installed, refer to :ref:`libmemif_gettingstarted_doc`
+and :ref:`libmemif_examples_doc` for additional information on basic use cases
+and API usage.
cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
-set(HEADERS_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+set(COMMON_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/common)
set(COMMON_SOURCE_FILES
-
+ common/common.c
+ common/sender.c
+ common/responder.c
+ common/packet_handler.c
+ common/icmp_proto.c
)
list(APPEND EXAMPLES_LIST
-
+ loopback/main.c
+ icmp_responder/main.c
)
foreach (EXAMPLE_SRC ${EXAMPLES_LIST})
string(FIND ${EXAMPLE_SRC} "/" INDEX)
string(SUBSTRING ${EXAMPLE_SRC} 0 ${INDEX} EXECUTABLE)
- add_executable(${EXECUTABLE} ${COMMON_SOURCE_FILES} ${EXAMPLE_SRC})
- target_include_directories(${EXECUTABLE} PRIVATE $<BUILD_INTERFACE:${HEADERS_DIR}>)
+ add_executable(${EXECUTABLE} ${COMMON_SOURCE_FILES} ${EXAMPLE_SRC} )
+ target_include_directories(${EXECUTABLE} PRIVATE $<BUILD_INTERFACE:${COMMON_HEADERS}>)
target_link_libraries(${EXECUTABLE} memif ${CMAKE_THREAD_LIBS_INIT})
endforeach()
--- /dev/null
+#include <common.h>
+
+void
+print_memif_ring_details (memif_connection_t *c, uint16_t qid, uint8_t is_rx)
+{
+ /* TODO: print memif shared memory details */
+}
+
+void
+print_memif_rx_ring_details (memif_connection_t *c, uint16_t qid)
+{
+ print_memif_ring_details (c, qid, /* RX */ 1);
+}
+
+void
+print_memif_tx_ring_details (memif_connection_t *c, uint16_t qid)
+{
+ print_memif_ring_details (c, qid, /* TX */ 0);
+}
+
+void
+print_version ()
+{
+ printf ("libmemif version: %s, memif version: %s\n", LIBMEMIF_VERSION,
+ memif_get_version_str ());
+}
+
+int
+parse_ip4 (const char *input, uint8_t out[4])
+{
+ char *ui, *end;
+ char *tmp = strdup (input);
+
+ ui = strtok (tmp, ".");
+ if (ui == NULL)
+ return -1;
+ out[0] = strtol (ui, &end, 10);
+
+ ui = strtok (NULL, ".");
+ if (ui == NULL)
+ return -1;
+ out[1] = strtol (ui, &end, 10);
+
+ ui = strtok (NULL, ".");
+ if (ui == NULL)
+ return -1;
+ out[2] = strtol (ui, &end, 10);
+
+ ui = strtok (NULL, ".");
+ if (ui == NULL)
+ return -1;
+ out[3] = strtol (ui, &end, 10);
+
+ free (tmp);
+
+ return 0;
+}
+
+int
+parse_mac (const char *input, uint8_t out[6])
+{
+ char *ui, *end;
+ char *tmp = strdup (input);
+
+ ui = strtok (tmp, ":");
+ if (ui == NULL)
+ return -1;
+ out[0] = strtol (ui, &end, 16);
+ ui = strtok (NULL, ":");
+ if (ui == NULL)
+ return -1;
+ out[1] = strtol (ui, &end, 16);
+ ui = strtok (NULL, ":");
+ if (ui == NULL)
+ return -1;
+ out[2] = strtol (ui, &end, 16);
+ ui = strtok (NULL, ":");
+ if (ui == NULL)
+ return -1;
+ out[3] = strtol (ui, &end, 16);
+ ui = strtok (NULL, ":");
+ if (ui == NULL)
+ return -1;
+ out[4] = strtol (ui, &end, 16);
+ ui = strtok (NULL, ":");
+ if (ui == NULL)
+ return -1;
+ out[5] = strtol (ui, &end, 16);
+
+ free (tmp);
+
+ return 0;
+}
+
+void
+alloc_memif_buffers (memif_connection_t *c)
+{
+ c->rx_bufs =
+ (memif_buffer_t *) malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
+ c->rx_buf_num = 0;
+ c->tx_bufs =
+ (memif_buffer_t *) malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
+ c->tx_buf_num = 0;
+}
+
+void
+free_memif_buffers (memif_connection_t *c)
+{
+ if (c->rx_bufs != NULL)
+ free (c->rx_bufs);
+ c->rx_bufs = NULL;
+ c->rx_buf_num = 0;
+ if (c->tx_bufs != NULL)
+ free (c->tx_bufs);
+ c->tx_bufs = NULL;
+ c->tx_buf_num = 0;
+}
+
+void
+print_memif_details (memif_connection_t *c)
+{
+ printf ("MEMIF DETAILS\n");
+ printf ("==============================\n");
+
+ memif_details_t md;
+ memset (&md, 0, sizeof (md));
+ ssize_t buflen = 2048;
+ char *buf = (char *) malloc (buflen);
+ memset (buf, 0, buflen);
+ int err, e;
+
+ err = memif_get_details (c->conn, &md, buf, buflen);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("%s", memif_strerror (err));
+ if (err == MEMIF_ERR_NOCONN)
+ {
+ free (buf);
+ return;
+ }
+ }
+
+ printf ("\tinterface name: %s\n", (char *) md.if_name);
+ printf ("\tapp name: %s\n", (char *) md.inst_name);
+ printf ("\tremote interface name: %s\n", (char *) md.remote_if_name);
+ printf ("\tremote app name: %s\n", (char *) md.remote_inst_name);
+ printf ("\tid: %u\n", md.id);
+ printf ("\tsecret: %s\n", (char *) md.secret);
+ printf ("\trole: ");
+ if (md.role)
+ printf ("slave\n");
+ else
+ printf ("master\n");
+ printf ("\tmode: ");
+ switch (md.mode)
+ {
+ case 0:
+ printf ("ethernet\n");
+ break;
+ case 1:
+ printf ("ip\n");
+ break;
+ case 2:
+ printf ("punt/inject\n");
+ break;
+ default:
+ printf ("unknown\n");
+ break;
+ }
+ printf ("\tsocket path: %s\n", (char *) md.socket_path);
+ printf ("\trx queues:\n");
+ for (e = 0; e < md.rx_queues_num; e++)
+ {
+ printf ("\t\tqueue id: %u\n", md.rx_queues[e].qid);
+ printf ("\t\tring size: %u\n", md.rx_queues[e].ring_size);
+ printf ("\t\tbuffer size: %u\n", md.rx_queues[e].buffer_size);
+ }
+ printf ("\ttx queues:\n");
+ for (e = 0; e < md.tx_queues_num; e++)
+ {
+ printf ("\t\tqueue id: %u\n", md.tx_queues[e].qid);
+ printf ("\t\tring size: %u\n", md.tx_queues[e].ring_size);
+ printf ("\t\tbuffer size: %u\n", md.tx_queues[e].buffer_size);
+ }
+ printf ("\tlink: ");
+ if (md.link_up_down)
+ printf ("up\n");
+ else
+ printf ("down\n");
+
+ free (buf);
+}
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 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 _COMMON_H_
+#define _COMMON_H_
+
+#include <libmemif.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+#ifdef ICMP_DBG
+#define DBG(...) \
+ do \
+ { \
+ printf (APP_NAME ":%s:%d: ", __func__, __LINE__); \
+ printf (__VA_ARGS__); \
+ printf ("\n"); \
+ } \
+ while (0)
+#else
+#define DBG(...)
+#endif
+
+#define INFO(...) \
+ do \
+ { \
+ printf ("INFO: " __VA_ARGS__); \
+ printf ("\n"); \
+ } \
+ while (0)
+
+/* maximum tx/rx memif buffers */
+#define MAX_MEMIF_BUFS 256
+
+struct memif_connection;
+
+typedef int (memif_packet_handler_t) (struct memif_connection *conn);
+
+typedef int (packet_generator_t) (struct memif_connection *c,
+ uint16_t num_pkts);
+
+typedef struct memif_connection
+{
+ uint16_t index;
+ /* memif conenction handle */
+ memif_conn_handle_t conn;
+ uint8_t is_connected;
+ /* transmit queue id */
+ uint16_t tx_qid;
+ /* tx buffers */
+ memif_buffer_t *tx_bufs;
+ /* allocated tx buffers counter */
+ /* number of tx buffers pointing to shared memory */
+ uint16_t tx_buf_num;
+ /* rx buffers */
+ memif_buffer_t *rx_bufs;
+ /* allcoated rx buffers counter */
+ /* number of rx buffers pointing to shared memory */
+ uint16_t rx_buf_num;
+ memif_packet_handler_t *packet_handler;
+ /* interface ip address */
+ uint8_t ip_addr[4];
+ /* interface hw address */
+ uint8_t hw_addr[6];
+} memif_connection_t;
+
+void print_version ();
+
+int parse_ip4 (const char *input, uint8_t out[4]);
+
+int parse_mac (const char *input, uint8_t out[6]);
+
+void alloc_memif_buffers (memif_connection_t *c);
+
+void free_memif_buffers (memif_connection_t *c);
+
+void print_memif_details (memif_connection_t *c);
+
+void print_memif_rx_ring_details (memif_connection_t *c, uint16_t qid);
+
+void print_memif_tx_ring_details (memif_connection_t *c, uint16_t qid);
+
+int send_packets (memif_connection_t *conn, uint16_t qid,
+ packet_generator_t *gen, uint32_t num_pkts,
+ uint16_t max_pkt_size);
+
+/* Expect packets smaller than 2048b */
+int responder (memif_conn_handle_t conn, void *private_ctx, uint16_t qid);
+
+/* Expect packets smaller than 2048b */
+int responder_zero_copy (memif_conn_handle_t conn, void *private_ctx,
+ uint16_t qid);
+
+/* reply with the same data */
+int basic_packet_handler (memif_connection_t *conn);
+
+/* ICMPv4 and ARP handler */
+int icmp_packet_handler (memif_connection_t *conn);
+
+#endif /* COMMON_H */
\ 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.
+ *------------------------------------------------------------------
+ */
+
+#include <stdint.h>
+#include <net/if.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/uio.h>
+#include <sys/mman.h>
+#include <sys/prctl.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <linux/ip.h>
+#include <linux/icmp.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <netinet/if_ether.h>
+#include <net/if_arp.h>
+#include <asm/byteorder.h>
+#include <byteswap.h>
+#include <assert.h>
+
+#include <icmp_proto.h>
+
+static uint16_t
+cksum (void *addr, ssize_t len)
+{
+ char *data = (char *) addr;
+
+ uint32_t acc = 0xffff;
+
+ ssize_t i;
+ for (i = 0; (i + 1) < len; i += 2)
+ {
+ uint16_t word;
+ memcpy (&word, data + i, 2);
+ acc += ntohs (word);
+ if (acc > 0xffff)
+ acc -= 0xffff;
+ }
+
+ if (len & 1)
+ {
+ uint16_t word = 0;
+ memcpy (&word, data + len - 1, 1);
+ acc += ntohs (word);
+ if (acc > 0xffff)
+ acc -= 0xffff;
+ }
+ return htons (~acc);
+}
+
+int
+print_packet (void *pck)
+{
+ if (pck == NULL)
+ {
+ printf ("ICMP_PROTO: no data\n");
+ return -1;
+ }
+ struct iphdr *ip;
+ struct icmphdr *icmp;
+ ip = (struct iphdr *) pck;
+ icmp = (struct icmphdr *) (pck + sizeof (struct iphdr));
+ printf ("received packet:\n");
+ printf ("\tiphdr:\n");
+ printf ("\t\tihl: %u\n\t\tversion: %u\n\t\tlen: %u\n\t\tid: %u\n", ip->ihl,
+ ip->version, __bswap_16 (ip->tot_len), ip->id);
+ printf ("\t\tprotocol: %u\n", ip->protocol);
+
+ printf ("\t\tsaddr: ");
+ int i;
+ for (i = 0; i < 4; i++)
+ {
+ printf ("%u.", ((uint8_t *) &ip->saddr)[i]);
+ }
+ printf ("\n");
+
+ printf ("\t\tdaddr: ");
+ for (i = 0; i < 4; i++)
+ {
+ printf ("%u.", ((uint8_t *) &ip->daddr)[i]);
+ }
+ printf ("\n");
+ printf ("\ticmphdr:\n");
+ printf ("\t\ttype: %s\n",
+ (icmp->type == ICMP_ECHO) ? "ICMP_ECHO" : "ICMP_ECHOREPLY");
+
+ return 0;
+}
+
+static ssize_t
+resolve_arp (void *arp)
+{
+ struct arphdr *resp = (struct arphdr *) arp;
+
+ resp->ar_hrd = __bswap_16 (ARPHRD_ETHER);
+
+ resp->ar_pro = __bswap_16 (0x0800);
+
+ resp->ar_hln = 6;
+ resp->ar_pln = 4;
+
+ resp->ar_op = __bswap_16 (ARPOP_REPLY);
+
+ return sizeof (struct arphdr);
+}
+
+static ssize_t
+resolve_eth_arp (struct ether_arp *eth_arp, void *eth_arp_resp,
+ uint8_t ip_addr[4])
+{
+ struct ether_arp *resp = (struct ether_arp *) eth_arp_resp;
+
+ resolve_arp (&resp->ea_hdr);
+
+ memcpy (resp->arp_tha, eth_arp->arp_sha, 6);
+ memcpy (resp->arp_tpa, eth_arp->arp_spa, 4);
+
+ memcpy (
+ resp->arp_sha,
+ (((struct ether_header *) (eth_arp_resp - sizeof (struct ether_header)))
+ ->ether_shost),
+ 6);
+
+ memcpy (resp->arp_spa, ip_addr, 4);
+
+ return sizeof (struct ether_arp);
+}
+
+static ssize_t
+resolve_eth (struct ether_header *eth, void *eth_resp, uint8_t hw_addr[6])
+{
+ struct ether_header *resp = (struct ether_header *) eth_resp;
+ memcpy (resp->ether_dhost, eth->ether_shost, 6);
+
+ memcpy (resp->ether_shost, hw_addr, 6);
+
+ resp->ether_type = eth->ether_type;
+
+ return sizeof (struct ether_header);
+}
+
+static ssize_t
+resolve_ip (struct iphdr *ip, void *ip_resp, uint8_t ip_addr[4])
+{
+ struct iphdr *resp = (struct iphdr *) ip_resp;
+ resp->ihl = 5;
+ resp->version = 4;
+ resp->tos = 0;
+ /*len updated later */
+ resp->tot_len = 0x0000;
+ resp->id = 0;
+ resp->frag_off = 0;
+ resp->ttl = 0x40;
+ resp->protocol = 1;
+ ((uint8_t *) &resp->saddr)[0] = ip_addr[0];
+ ((uint8_t *) &resp->saddr)[1] = ip_addr[1];
+ ((uint8_t *) &resp->saddr)[2] = ip_addr[2];
+ ((uint8_t *) &resp->saddr)[3] = ip_addr[3];
+ resp->daddr = ip->saddr;
+
+ /* resp->check = cksum (resp, sizeof (struct iphdr)); */
+
+ return sizeof (struct iphdr);
+}
+
+static ssize_t
+resolve_icmp (struct icmphdr *icmp, void *icmp_resp)
+{
+ struct icmphdr *resp = (struct icmphdr *) icmp_resp;
+ resp->type = 0x00;
+ resp->code = 0;
+ resp->un.echo.id = icmp->un.echo.id;
+ resp->un.echo.sequence = icmp->un.echo.sequence;
+
+ /*resp->checksum = cksum (resp, sizeof (struct icmphdr)); */
+
+ return sizeof (struct icmphdr);
+}
+
+int
+resolve_packet (void *in_pck, ssize_t in_size, void *out_pck,
+ uint32_t *out_size, uint8_t ip_addr[4], uint8_t hw_addr[6])
+{
+ struct ether_header *eh;
+ struct ether_arp *eah;
+ struct iphdr *ip, *ip_out;
+ struct icmphdr *icmp;
+ *out_size = 0;
+
+ if ((in_pck == NULL) || (out_pck == NULL))
+ return -1;
+
+ eh = (struct ether_header *) in_pck;
+ *out_size = resolve_eth (eh, out_pck, hw_addr);
+
+ if (eh->ether_type == 0x0608)
+ {
+ eah = (struct ether_arp *) (in_pck + *out_size);
+ *out_size += resolve_eth_arp (eah, out_pck + *out_size, ip_addr);
+ }
+ else if (eh->ether_type == 0x0008)
+ {
+#ifdef ICMP_DBG
+ print_packet (in_pck + *out_size);
+#endif
+ ip = (struct iphdr *) (in_pck + *out_size);
+ ip_out = (struct iphdr *) (out_pck + *out_size);
+ *out_size += resolve_ip (ip, out_pck + *out_size, ip_addr);
+ if (ip->protocol == 1)
+ {
+ icmp = (struct icmphdr *) (in_pck + *out_size);
+ *out_size += resolve_icmp (icmp, out_pck + *out_size);
+ ((struct icmphdr *) (out_pck + *out_size - sizeof (struct icmphdr)))
+ ->checksum = cksum (out_pck + *out_size - sizeof (struct icmphdr),
+ sizeof (struct icmphdr));
+ /* payload */
+ memcpy (out_pck + *out_size, in_pck + *out_size,
+ in_size - *out_size);
+ *out_size = in_size;
+ ip_out->tot_len =
+ __bswap_16 (*out_size - sizeof (struct ether_header));
+ ip_out->check = cksum (ip_out, sizeof (struct iphdr));
+ }
+ }
+ return 0;
+}
+
+static ssize_t
+generate_eth (struct ether_header *eh, uint8_t hw_daddr[6])
+{
+ uint8_t hw_addr[6];
+ int i;
+ for (i = 0; i < 6; i++)
+ {
+ hw_addr[i] = 'a';
+ }
+ memcpy (eh->ether_shost, hw_addr, 6);
+ memcpy (eh->ether_dhost, hw_daddr, 6);
+
+ eh->ether_type = 0x0008;
+
+ return sizeof (struct ether_header);
+}
+
+static ssize_t
+generate_ip (struct iphdr *ip, uint8_t saddr[4], uint8_t daddr[4])
+{
+ ip->ihl = 5;
+ ip->version = 4;
+ ip->tos = 0;
+ /*len updated later */
+ ip->tot_len = 0x5400;
+ ip->id = 0;
+ ip->frag_off = 0;
+ ip->ttl = 0x40;
+ ip->protocol = 1;
+ /* saddr */
+ ((uint8_t *) &ip->saddr)[0] = saddr[0];
+ ((uint8_t *) &ip->saddr)[1] = saddr[1];
+ ((uint8_t *) &ip->saddr)[2] = saddr[2];
+ ((uint8_t *) &ip->saddr)[3] = saddr[3];
+ /* daddr */
+ ((uint8_t *) &ip->daddr)[0] = daddr[0];
+ ((uint8_t *) &ip->daddr)[1] = daddr[1];
+ ((uint8_t *) &ip->daddr)[2] = daddr[2];
+ ((uint8_t *) &ip->daddr)[3] = daddr[3];
+
+ ip->check = cksum (ip, sizeof (struct iphdr));
+
+ return sizeof (struct iphdr);
+}
+
+static ssize_t
+generate_icmp (struct icmphdr *icmp, uint32_t seq)
+{
+ icmp->type = ICMP_ECHO;
+ icmp->code = 0;
+ icmp->un.echo.id = 0;
+ icmp->un.echo.sequence = seq;
+
+ return sizeof (struct icmphdr);
+}
+
+int
+generate_packet (void *pck, uint32_t *size, uint8_t saddr[4], uint8_t daddr[4],
+ uint8_t hw_daddr[6], uint32_t seq)
+{
+ struct ether_header *eh;
+ struct iphdr *ip;
+ struct icmphdr *icmp;
+
+ *size = 0;
+
+ eh = (struct ether_header *) pck;
+ *size += generate_eth (eh, hw_daddr);
+
+ ip = (struct iphdr *) (pck + *size);
+ *size += generate_ip (ip, saddr, daddr);
+
+ icmp = (struct icmphdr *) (pck + *size);
+ *size += generate_icmp (icmp, seq);
+
+ ((struct icmphdr *) (pck + *size - sizeof (struct icmphdr)))->checksum =
+ cksum (pck + *size - sizeof (struct icmphdr), sizeof (struct icmphdr));
+
+ ip->tot_len = __bswap_16 (*size - sizeof (struct ether_header));
+ ip->check = 0;
+ ip->check = cksum (ip, sizeof (struct iphdr));
+
+ return 0;
+}
+
+int
+generate_packet2 (void *pck, uint32_t *size, uint8_t saddr[4],
+ uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq,
+ icmpr_flow_mode_t mode)
+{
+ struct ether_header *eh;
+ struct iphdr *ip;
+ struct icmphdr *icmp;
+
+ *size = 0;
+
+ if (mode == ICMPR_FLOW_MODE_ETH)
+ {
+ eh = (struct ether_header *) pck;
+ *size += generate_eth (eh, hw_daddr);
+ }
+
+ ip = (struct iphdr *) (pck + *size);
+ *size += generate_ip (ip, saddr, daddr);
+
+ icmp = (struct icmphdr *) (pck + *size);
+ *size += generate_icmp (icmp, seq);
+
+ ((struct icmphdr *) (pck + *size - sizeof (struct icmphdr)))->checksum =
+ cksum (pck + *size - sizeof (struct icmphdr), sizeof (struct icmphdr));
+
+ ip->tot_len = __bswap_16 (*size - sizeof (struct ether_header));
+ ip->check = 0;
+ ip->check = cksum (ip, sizeof (struct iphdr));
+
+ return 0;
+}
+
+#define GET_HEADER(out, hdr, src, off) \
+ do \
+ { \
+ out = (hdr *) (src + off); \
+ off += sizeof (hdr); \
+ } \
+ while (0)
+
+int
+resolve_packet_zero_copy (void *pck, uint32_t *size, uint8_t ip_addr[4],
+ uint8_t hw_addr[6])
+{
+ struct ether_header *eh;
+ struct ether_arp *eah;
+ struct iphdr *ip;
+ struct icmphdr *icmp;
+ uint32_t offset = 0;
+
+ if (pck == NULL)
+ return 0;
+
+ GET_HEADER (eh, struct ether_header, pck, offset);
+
+ memcpy (eh->ether_dhost, eh->ether_shost, 6);
+ memcpy (eh->ether_shost, hw_addr, 6);
+
+ if (eh->ether_type == 0x0608)
+ {
+ GET_HEADER (eah, struct ether_arp, pck, offset);
+ struct arphdr *arp = &eah->ea_hdr;
+
+ arp->ar_hrd = __bswap_16 (ARPHRD_ETHER);
+ arp->ar_pro = __bswap_16 (0x0800);
+
+ arp->ar_hln = 6;
+ arp->ar_pln = 4;
+
+ arp->ar_op = __bswap_16 (ARPOP_REPLY);
+
+ memcpy (eah->arp_tha, eah->arp_sha, 6);
+ memcpy (eah->arp_tpa, eah->arp_spa, 4);
+
+ memcpy (eah->arp_sha, eh->ether_shost, 6);
+ memcpy (eah->arp_spa, ip_addr, 4);
+ }
+
+ else if (eh->ether_type == 0x0008)
+ {
+ GET_HEADER (ip, struct iphdr, pck, offset);
+
+ if (ip->protocol == 1)
+ {
+ ip->ihl = 5;
+ ip->version = 4;
+ ip->tos = 0;
+ ip->tot_len = 0x0000;
+ ip->id = 0;
+ ip->frag_off = 0;
+ ip->ttl = 0x40;
+ ip->protocol = 1;
+ ip->check = 0x0000;
+ ip->daddr = ip->saddr;
+ ((uint8_t *) &ip->saddr)[0] = ip_addr[0];
+ ((uint8_t *) &ip->saddr)[1] = ip_addr[1];
+ ((uint8_t *) &ip->saddr)[2] = ip_addr[2];
+ ((uint8_t *) &ip->saddr)[3] = ip_addr[3];
+
+ GET_HEADER (icmp, struct icmphdr, pck, offset);
+
+ icmp->type = 0x00;
+ icmp->code = 0;
+ icmp->checksum = cksum (icmp, sizeof (struct icmphdr));
+
+ /* rest is payload */
+ offset = *size;
+
+ ip->tot_len = __bswap_16 (offset - sizeof (struct ether_header));
+ ip->check = cksum (ip, sizeof (struct iphdr));
+ }
+ }
+
+ assert (offset == *size && "unsupported protocol");
+ return 0;
+}
+
+int
+resolve_packet_zero_copy_add_encap (void **pck_, uint32_t *size,
+ uint8_t ip_addr[4])
+{
+ struct ether_header *eh;
+ struct iphdr *ip;
+ struct icmphdr *icmp;
+ int32_t offset = 0;
+ uint16_t encap_size = sizeof (struct ether_header);
+ void *pck = *pck_;
+
+ if (pck == NULL)
+ return 0;
+
+ *pck_ -= encap_size;
+ offset -= encap_size;
+
+ GET_HEADER (eh, struct ether_header, pck, offset);
+
+ uint8_t hw_daddr[6];
+ memset (hw_daddr, 0, sizeof (uint8_t) * 6);
+
+ generate_eth (eh, hw_daddr);
+
+ if (eh->ether_type == 0x0008)
+ {
+ GET_HEADER (ip, struct iphdr, pck, offset);
+
+ if (ip->protocol == 1)
+ {
+ ip->ihl = 5;
+ ip->version = 4;
+ ip->tos = 0;
+ ip->tot_len = 0x0000;
+ ip->id = 0;
+ ip->frag_off = 0;
+ ip->ttl = 0x40;
+ ip->protocol = 1;
+ ip->check = 0x0000;
+ ip->daddr = ip->saddr;
+ ((uint8_t *) &ip->saddr)[0] = ip_addr[0];
+ ((uint8_t *) &ip->saddr)[1] = ip_addr[1];
+ ((uint8_t *) &ip->saddr)[2] = ip_addr[2];
+ ((uint8_t *) &ip->saddr)[3] = ip_addr[3];
+
+ GET_HEADER (icmp, struct icmphdr, pck, offset);
+
+ icmp->type = 0x00;
+ icmp->code = 0;
+ icmp->checksum = cksum (icmp, sizeof (struct icmphdr));
+
+ /* rest is payload */
+ offset = *size;
+
+ ip->tot_len = __bswap_16 (offset - sizeof (struct ether_header));
+ ip->check = cksum (ip, sizeof (struct iphdr));
+ }
+ }
+
+ offset += encap_size;
+
+ assert (offset != *size &&
+ "new packet length must be increased by encap size");
+
+ /* overwrite packet size */
+ *size = offset;
+
+ return 0;
+}
--- /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 _ICMP_PROTO_H_
+#define _ICMP_PROTO_H_
+
+typedef enum
+{
+ ICMPR_FLOW_MODE_ETH = 0,
+ ICMPR_FLOW_MODE_IP,
+} icmpr_flow_mode_t;
+
+int resolve_packet (void *in_pck, ssize_t in_size, void *out_pck,
+ uint32_t *out_size, uint8_t ip_addr[4],
+ uint8_t hw_addr[6]);
+
+/* resolve packet in place */
+int resolve_packet_zero_copy (void *pck, uint32_t *size, uint8_t ip_addr[4],
+ uint8_t hw_addr[6]);
+
+/* resolve packet in place and add eth encap */
+int resolve_packet_zero_copy_add_encap (void **pck, uint32_t *size,
+ uint8_t ip_addr[4]);
+
+int generate_packet (void *pck, uint32_t *size, uint8_t saddr[4],
+ uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq);
+
+int generate_packet2 (void *pck, uint32_t *size, uint8_t saddr[4],
+ uint8_t daddr[4], uint8_t hw_daddr[6], uint32_t seq,
+ icmpr_flow_mode_t);
+
+int print_packet (void *pck);
+
+#endif /* _ICMP_PROTO_H_ */
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 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 <common.h>
+#include <icmp_proto.h>
+
+/* reply with the same data */
+int
+basic_packet_handler (memif_connection_t *c)
+{
+ int i;
+ memif_buffer_t *dest, *src;
+
+ /* in case of zero-copy the tx_buf_num will be zero, so the loop body won't
+ * execute */
+ for (i = 0; i < c->tx_buf_num; i++)
+ {
+ memcpy (c->tx_bufs[i].data, c->rx_bufs[i].data, c->rx_bufs[i].len);
+ }
+
+ return 0;
+}
+
+/* ICMPv4 and ARP handler */
+int
+icmp_packet_handler (memif_connection_t *c)
+{
+ int i;
+ memif_buffer_t *dest, *src;
+
+ /* if tx_buf_num > 0 we use non-zero-copy mode */
+ if (c->tx_buf_num > 0)
+ {
+ for (i = 0; i < c->tx_buf_num; i++)
+ {
+ resolve_packet (c->rx_bufs[i].data, c->rx_bufs[i].len,
+ c->tx_bufs[i].data, &c->tx_bufs[i].len, c->ip_addr,
+ c->hw_addr);
+ }
+ }
+ else
+ {
+ for (i = 0; i < c->rx_buf_num; i++)
+ {
+ resolve_packet_zero_copy (c->rx_bufs[i].data, &c->rx_bufs[i].len,
+ c->ip_addr, c->hw_addr);
+ }
+ }
+
+ return 0;
+}
\ No newline at end of file
--- /dev/null
+#include <common.h>
+
+int
+responder (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
+{
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+ int err, i;
+ uint16_t tx;
+
+ /* receive packets from the shared memory */
+ err = memif_rx_burst (conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &c->rx_buf_num);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_rx_burst: %s", memif_strerror (err));
+ return err;
+ }
+
+ do
+ {
+ /* allocate tx buffers */
+ err = memif_buffer_alloc (conn, qid, c->tx_bufs, c->rx_buf_num,
+ &c->tx_buf_num, 2048);
+ /* suppress full ring error MEMIF_ERR_NOBUF_RING */
+ if (err != MEMIF_ERR_SUCCESS && err != MEMIF_ERR_NOBUF_RING)
+ {
+ INFO ("memif_buffer_alloc: %s", memif_strerror (err));
+ goto error;
+ }
+
+ /* Process the packets */
+ if (c->packet_handler == NULL)
+ {
+ INFO ("Missing packet handler");
+ goto error;
+ }
+ err = c->packet_handler (c);
+ if (err != 0)
+ {
+ INFO ("packet handler error: %d", err);
+ goto error;
+ }
+ /* Done processing packets */
+
+ /* refill the queue */
+ err = memif_refill_queue (conn, qid, c->tx_buf_num, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ goto error;
+ }
+ c->rx_buf_num -= c->tx_buf_num;
+
+ err = memif_tx_burst (conn, qid, c->tx_bufs, c->tx_buf_num, &tx);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_tx_burst: %s", memif_strerror (err));
+ goto error;
+ }
+ c->tx_buf_num -= tx;
+
+ /* This should never happen */
+ if (c->tx_buf_num != 0)
+ {
+ INFO ("memif_tx_burst failed to send all allocated buffers.");
+ goto error;
+ }
+ }
+ while (c->rx_buf_num > 0);
+
+ return 0;
+
+error:
+ err = memif_refill_queue (conn, qid, c->rx_buf_num, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ return err;
+ }
+ c->rx_buf_num = 0;
+
+ return -1;
+}
+
+int
+responder_zero_copy (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
+{
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+ int err, i;
+ uint16_t tx, tx2;
+
+ /* receive packets from the shared memory */
+ err = memif_rx_burst (conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &c->rx_buf_num);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_rx_burst: %s", memif_strerror (err));
+ return err;
+ }
+
+ do
+ {
+ /* Note that in zero copy memif_buffer_alloc is not part of respond
+ process,
+ * instead rx buffers are used directly using memif_buffer_enq_tx.
+ * /
+
+ /* Process the packets */
+ if (c->packet_handler == NULL)
+ {
+ INFO ("Missing packet handler");
+ goto error;
+ }
+ err = c->packet_handler (c);
+ if (err != 0)
+ {
+ INFO ("packet handler error: %d", err);
+ goto error;
+ }
+ /* Done processing packets */
+
+ /* Swap rx and tx buffers, swapped tx buffers are considered allocated
+ * and are ready to be transmitted. Notice that the buffers are swapped
+ * only in memif driver and locally remain in rx_bufs queue.
+ */
+ err = memif_buffer_enq_tx (conn, qid, c->rx_bufs, c->rx_buf_num, &tx);
+ /* suppress full ring error MEMIF_ERR_NOBUF_RING */
+ if (err != MEMIF_ERR_SUCCESS && err != MEMIF_ERR_NOBUF_RING)
+ {
+ INFO ("memif_buffer_alloc: %s", memif_strerror (err));
+ goto error;
+ }
+
+ /* refill the queue */
+ err = memif_refill_queue (conn, qid, tx, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ goto error;
+ }
+ c->rx_buf_num -= tx;
+
+ /* Notice that we send from rx_bufs as the buffers were only swapped
+ * internally in memif driver */
+ err = memif_tx_burst (conn, qid, c->rx_bufs, tx, &tx2);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_tx_burst: %s", memif_strerror (err));
+ goto error;
+ }
+ tx -= tx2;
+
+ /* This should never happen */
+ if (tx != 0)
+ {
+ INFO ("memif_tx_burst failed to send all allocated buffers.");
+ goto error;
+ }
+ }
+ while (c->rx_buf_num > 0);
+
+ return 0;
+
+error:
+ err = memif_refill_queue (conn, qid, c->rx_buf_num, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ return err;
+ }
+ c->rx_buf_num = 0;
+
+ return -1;
+}
\ No newline at end of file
--- /dev/null
+#include <common.h>
+
+int
+send_packets (memif_connection_t *c, uint16_t qid,
+ packet_generator_t *generator, uint32_t num_pkts,
+ uint16_t max_pkt_size)
+{
+ int err, i;
+ uint16_t tx;
+
+ do
+ {
+ err = memif_buffer_alloc (c->conn, qid, c->tx_bufs,
+ num_pkts > MAX_MEMIF_BUFS ? MAX_MEMIF_BUFS :
+ num_pkts,
+ &c->tx_buf_num, max_pkt_size);
+ /* suppress full ring error MEMIF_ERR_NOBUF_RING */
+ if (err != MEMIF_ERR_SUCCESS && err != MEMIF_ERR_NOBUF_RING)
+ {
+ INFO ("memif_buffer_alloc: %s", memif_strerror (err));
+ goto error;
+ }
+
+ /* generate packet inside allocated buffers */
+ err = generator (c, num_pkts);
+ if (err != 0)
+ {
+ INFO ("paclet generator error: %d", err);
+ goto error;
+ }
+
+ err = memif_tx_burst (c->conn, qid, c->tx_bufs, c->tx_buf_num, &tx);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_tx_burst: %s", memif_strerror (err));
+ goto error;
+ }
+ c->tx_buf_num -= tx;
+
+ /* Should never happen... */
+ if (c->tx_buf_num > 0)
+ {
+ INFO ("Failed to send allocated packets");
+ goto error;
+ }
+ num_pkts -= tx;
+ }
+ while (num_pkts > 0);
+
+ return 0;
+
+error:
+ /* TODO: free alloocated tx buffers */
+ return -1;
+}
\ No newline at end of file
+++ /dev/null
-.. _libmemif_example_setup_doc:
-
-Example setup
-=============
-
-VPP-memif master icmp_responder slave
--------------------------------------
-
- Libmemif example app(s) use memif default socket file:
- ``/run/vpp/memif.sock``.
-
-Run VPP and icmpr-epoll example (default example when running in
-container).
-
- Other examples work similar to icmpr-epoll. Brief explanation can be
- found in :ref:`libmemif_examples_doc` .
-
-VPP-side config:
-
-::
-
- DBGvpp# create interface memif id 0 master
- DBGvpp# set int state memif0/0 up
- DBGvpp# set int ip address memif0/0 192.168.1.1/24
-
-icmpr-epoll:
-
-::
-
- conn 0 0
-
-Memif in slave mode will try to connect every 2 seconds. If connection
-establishment is successful, a message will show.
-
-::
-
- INFO: memif connected!
-
-..
-
- Error messages like “unmatched interface id” are printed only in
- debug mode.
-
-Check connected status. Use show command in icmpr-epoll:
-
-::
-
- show
- MEMIF DETAILS
- ==============================
- interface index: 0
- interface ip: 192.168.1.2
- interface name: memif_connection
- app name: ICMP_Responder
- remote interface name: memif0/0
- remote app name: VPP 17.10-rc0~132-g62f9cdd
- id: 0
- secret:
- role: slave
- mode: ethernet
- socket filename: /run/vpp/memif.sock
- rx queues:
- queue id: 0
- ring size: 1024
- buffer size: 2048
- tx queues:
- queue id: 0
- ring size: 1024
- buffer size: 2048
- link: up
- interface index: 1
- no connection
-
-Use sh memif command in VPP:
-
-::
-
- DBGvpp# sh memif
- interface memif0/0
- remote-name "ICMP_Responder"
- remote-interface "memif_connection"
- id 0 mode ethernet file /run/vpp/memif.sock
- flags admin-up connected
- listener-fd 12 conn-fd 13
- num-s2m-rings 1 num-m2s-rings 1 buffer-size 0
- master-to-slave ring 0:
- region 0 offset 32896 ring-size 1024 int-fd 16
- head 0 tail 0 flags 0x0000 interrupts 0
- master-to-slave ring 0:
- region 0 offset 0 ring-size 1024 int-fd 15
- head 0 tail 0 flags 0x0001 interrupts 0
-
-Send ping from VPP to icmpr-epoll:
-
-::
-
- DBGvpp# ping 192.168.1.2
- 64 bytes from 192.168.1.2: icmp_seq=2 ttl=64 time=.1888 ms
- 64 bytes from 192.168.1.2: icmp_seq=3 ttl=64 time=.1985 ms
- 64 bytes from 192.168.1.2: icmp_seq=4 ttl=64 time=.1813 ms
- 64 bytes from 192.168.1.2: icmp_seq=5 ttl=64 time=.1929 ms
-
- Statistics: 5 sent, 4 received, 20% packet loss
-
-multiple queues VPP-memif slave icmp_responder master
------------------------------------------------------
-
-Run icmpr-epoll as in previous example setup. Run VPP with startup conf,
-enabling 2 worker threads. Example startup.conf:
-
-::
-
- unix {
- interactive
- nodaemon
- full-coredump
- }
-
- cpu {
- workers 2
- }
-
-VPP-side config:
-
-::
-
- DBGvpp# create memif id 0 slave rx-queues 2 tx-queues 2
- DBGvpp# set int state memif0/0 up
- DBGvpp# set int ip address memif0/0 192.168.1.1/24
-
-icmpr-epoll:
-
-::
-
- conn 0 1
-
-When connection is established a message will print:
-
-::
-
- INFO: memif connected!
-
-..
-
- Error messages like “unmatched interface id” are printed only in
- debug mode.
-
-Check connected status. Use show command in icmpr-epoll:
-
-::
-
- show
- MEMIF DETAILS
- ==============================
- interface index: 0
- interface ip: 192.168.1.2
- interface name: memif_connection
- app name: ICMP_Responder
- remote interface name: memif0/0
- remote app name: VPP 17.10-rc0~132-g62f9cdd
- id: 0
- secret:
- role: master
- mode: ethernet
- socket filename: /run/vpp/memif.sock
- rx queues:
- queue id: 0
- ring size: 1024
- buffer size: 2048
- queue id: 1
- ring size: 1024
- buffer size: 2048
- tx queues:
- queue id: 0
- ring size: 1024
- buffer size: 2048
- queue id: 1
- ring size: 1024
- buffer size: 2048
- link: up
- interface index: 1
- no connection
-
-Use sh memif command in VPP:
-
-::
-
- DBGvpp# sh memif
- interface memif0/0
- remote-name "ICMP_Responder"
- remote-interface "memif_connection"
- id 0 mode ethernet file /run/vpp/memif.sock
- flags admin-up slave connected
- listener-fd -1 conn-fd 12
- num-s2m-rings 2 num-m2s-rings 2 buffer-size 2048
- slave-to-master ring 0:
- region 0 offset 0 ring-size 1024 int-fd 14
- head 0 tail 0 flags 0x0000 interrupts 0
- slave-to-master ring 1:
- region 0 offset 32896 ring-size 1024 int-fd 15
- head 0 tail 0 flags 0x0000 interrupts 0
- slave-to-master ring 0:
- region 0 offset 65792 ring-size 1024 int-fd 16
- head 0 tail 0 flags 0x0001 interrupts 0
- slave-to-master ring 1:
- region 0 offset 98688 ring-size 1024 int-fd 17
- head 0 tail 0 flags 0x0001 interrupts 0
-
-Send ping from VPP to icmpr-epoll:
-
-::
-
- DBGvpp# ping 192.168.1.2
- 64 bytes from 192.168.1.2: icmp_seq=2 ttl=64 time=.1439 ms
- 64 bytes from 192.168.1.2: icmp_seq=3 ttl=64 time=.2184 ms
- 64 bytes from 192.168.1.2: icmp_seq=4 ttl=64 time=.1458 ms
- 64 bytes from 192.168.1.2: icmp_seq=5 ttl=64 time=.1687 ms
-
- Statistics: 5 sent, 4 received, 20% packet loss
-
-icmp_responder master icmp_responder slave
-------------------------------------------
-
- This setup creates connection between two applications using
- libmemif. Traffic functionality is the same as when connection to
- VPP. App can receive ARP/ICMP request and transmit response.
-
-Run two instances of icmpr-epoll example. > If not running in container,
-make sure folder /run/vpp/ exists before creating memif master. Instance
-1 will be in master mode, instance 2 in slave mode. instance 1:
-
-::
-
- conn 0 1
-
-instance 2:
-
-::
-
- conn 0 0
-
-In 2 seconds, both instances should print connected! message:
-
-::
-
- INFO: memif connected!
-
-Check peer interface names using show command.
.. _libmemif_examples_doc:
-Examples
-========
+Libmemif Examples
+=================
-After build, root folder will contain scripts linking binary examples
-with library (same name as example apps). These scripts can be executed
-to run example apps without installing the library. Example apps
-binaries can be found in *libs* folder. To run binaries directly, make
-sure that libmemif library is installed.
+Example source code is located in `.../vpp/extras/libmemif/examples/` directory.
+The compiled binaries are located in `.../vpp/extras/libmemif/build/examples/`.
-Run in container
-----------------
-``ligato/libmemif-sample-service`` image contains built and installed
-libmemf. To run different examples, override docker CMD to start
-container in bash:
+ICMP Responder
+--------------
+**Application Source Code**: `.../vpp/extras/libmemif/examples/icmp_responder`
-::
+In this example, memif endpoint connects to an external application. The example
+application can resolve ARP and reply to ICMPv4 packets. The program will exit
+once the interface is disconnected Memif receive mode: interrupt.
- # docker run -it --entrypoint=/bin/bash -i --rm --name icmp-responder --hostname icmp-responder --privileged -v "/run/vpp/:/run/vpp/" ligato/libmemif-sample-service
+VPP (memif master) <--> icmp_responder app (memif slave)
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Start VPP and configure memif interface::
-Current WORKDIR is set to root repository directory. Example apps can be
-run from this directory (a script linking binary with library), or
-browse to ``./.libs`` folder and execute binary directly.
+ make run
+ ...
+ DBGvpp# create interface memif id 0 master
+ DBGvpp# set int state memif0/0 up
+ DBGvpp# set int ip address memif0/0 192.168.1.2/24
-* ``extras/libmemif/examples/icmp_responder``
+Start icmp_responder example app::
-Simplest implementation. Event polling is handled by libmemif.
-Single memif connection in slave mode is created (id 0). Use Ctrl + C to exit app.
-Memif receive mode: interrupt.
+ ./examples/icmp_responder
-* ``extras/libmemif/examples/icmp_responder-epoll`` (run in container by default)
+Memif in slave mode will try to connect every 2 seconds. If connection
+establishment is successful, the `memif connected` message will show::
-Supports multiple connections and master mode. User can create/delete connections, set ip addresses,
-print connection information. :ref:`libmemif_example_setup_doc` contains instructions on basic
-connection use cases setups. Memif receive mode: interrupt. App provides functionality to disable
-interrupts for specified queue/s for testing purposes. Polling mode is not implemented in this example.
+ INFO: memif connected!
-* ``extras/libmemif/examples/icmp_responder-mt``
+**Note**: Error messages like "unmatched interface id" are printed only in debug mode.
-Multi-thread example, very similar to icmpr-epoll. Packets are handled in threads assigned to specific queues. Slave mode only. Memif receive mode: polling (memif_rx_poll function), interrupt (memif_rx_interrupt function). Receive modes differ per queue.
+Verify that the memif is connected on VPP side::
+
+ DBGvpp# sh memif
+ interface memif0/0
+ remote-name "ICMP_Responder"
+ remote-interface "memif_connection"
+ id 0 mode ethernet file /run/vpp/memif.sock
+ flags admin-up connected
+ listener-fd 12 conn-fd 13
+ num-s2m-rings 1 num-m2s-rings 1 buffer-size 0
+ master-to-slave ring 0:
+ region 0 offset 32896 ring-size 1024 int-fd 16
+ head 0 tail 0 flags 0x0000 interrupts 0
+ master-to-slave ring 0:
+ region 0 offset 0 ring-size 1024 int-fd 15
+ head 0 tail 0 flags 0x0001 interrupts 0
+
+Send ping from VPP to icmp_responder (Default IPv4: 192.168.1.1)::
+
+ DBGvpp# ping 192.168.1.1
+ 64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=.1888 ms
+ 64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=.1985 ms
+ 64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=.1813 ms
+ 64 bytes from 192.168.1.1: icmp_seq=5 ttl=64 time=.1929 ms
+
+ Statistics: 5 sent, 4 received, 20% packet loss
+
+
+Loopback
+--------
+**Application Source Code**: `.../vpp/extras/libmemif/examples/loopback`
+
+In this example, two memif endpoints are connected to create a loopback.
+Once connected, a test packet is sent out the memif master interface to
+the memif slave interface, which replies with the same packet in a
+zero-copy way.
+In reverse mode, the packet is sent from the slave interface and is
+looped back by the master interface.
+
+Running The Loopback Application
+++++++++++++++++++++++++++++++++
+Start the loopback example::
+
+ ./examples/loopback
+
+You should see the `Received correct data.` message::
+
+ INFO: Received correct data.
+ INFO: Stopping the program
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 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 <stdlib.h>
+#include <sys/types.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include <libmemif.h>
+#include <common.h>
+
+#define APP_NAME "icmp_responder_example"
+
+#define IF_NAME "libmemif0"
+#define IF_ID 0
+#define SOCKET_PATH "/run/vpp/memif.sock"
+const uint8_t HW_ADDR[6] = { 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa };
+const uint8_t IP_ADDR[4] = { 192, 168, 1, 1 };
+
+memif_connection_t intf;
+int epfd;
+
+/* informs user about connected status. private_ctx is used by user to identify
+ * connection */
+int
+on_connect (memif_conn_handle_t conn, void *private_ctx)
+{
+ INFO ("memif connected!");
+ int err;
+
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+
+ c->is_connected = 1;
+ alloc_memif_buffers (c);
+
+ err = memif_refill_queue (conn, 0, -1, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ return err;
+ }
+
+ return 0;
+}
+
+/* informs user about disconnected status. private_ctx is used by user to
+ * identify connection */
+int
+on_disconnect (memif_conn_handle_t conn, void *private_ctx)
+{
+ INFO ("memif disconnected!");
+
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+
+ c->is_connected = 0;
+ free_memif_buffers (c);
+
+ /* stop event polling thread */
+ int err = memif_cancel_poll_event (memif_get_socket_handle (conn));
+ if (err != MEMIF_ERR_SUCCESS)
+ INFO ("We are doomed...");
+
+ return 0;
+}
+
+void
+print_help ()
+{
+ printf ("LIBMEMIF EXAMPLE APP: %s", APP_NAME);
+#ifdef ICMP_DBG
+ printf (" (debug)");
+#endif
+ printf ("\n");
+ printf ("==============================\n");
+ print_version ();
+ printf ("==============================\n");
+ printf (
+ "In this example, memif endpoint connects to an external application.\n");
+ printf (
+ "The example application can resolve ARP and reply to ICMPv4 packets.\n");
+ printf ("The program will exit once the interface is disconnected.\n");
+ printf ("==============================\n");
+ printf ("Usage: icmp_responder [OPTIONS]\n\n");
+ printf ("Options:\n");
+ printf ("\t-r\tInterface role <slave|master>. Default: slave\n");
+ printf ("\t-s\tSocket path. Supports abstract socket using @ before the "
+ "path. Default: /run/vpp/memif.sock\n");
+ printf ("\t-i\tInterface id. Default: 0\n");
+ printf ("\t-a\tIPv4 address. Default: 192.168.1.1\n");
+ printf ("\t-h\tMac address. Default: aa:aa:aa:aa:aa:aa\n");
+ printf ("\t-?\tShow help and exit.\n");
+ printf ("\t-v\tShow libmemif and memif version information and exit.\n");
+}
+
+int
+main (int argc, char *argv[])
+{
+ memif_socket_args_t memif_socket_args = { 0 };
+ memif_socket_handle_t memif_socket;
+ memif_conn_args_t memif_conn_args = { 0 };
+ int opt, err, ret = 0;
+ uint8_t is_master = 0;
+ char socket_path[108];
+ int id = IF_ID;
+
+ strncpy (socket_path, SOCKET_PATH, strlen (SOCKET_PATH));
+
+ /* prepare the private data */
+ memset (&intf, 0, sizeof (intf));
+ intf.packet_handler = icmp_packet_handler;
+ memcpy (intf.ip_addr, IP_ADDR, 4);
+ memcpy (intf.hw_addr, HW_ADDR, 6);
+
+ while ((opt = getopt (argc, argv, "r:s:i:a:h:?v")) != -1)
+ {
+ switch (opt)
+ {
+ case 'r':
+ if (strncmp (optarg, "master", sizeof (optarg)) == 0)
+ {
+ is_master = 1;
+ }
+ else if (strncmp (optarg, "slave", sizeof (optarg)) == 0)
+ {
+ is_master = 0;
+ }
+ else
+ {
+ INFO ("Invalid role value: '%s'", optarg);
+ return -1;
+ }
+ break;
+ case 's':
+ sprintf (socket_path, "%s", optarg);
+ break;
+ case 'i':
+ id = atoi (optarg);
+ break;
+ case 'a':
+ if (parse_ip4 (optarg, intf.ip_addr) != 0)
+ {
+ INFO ("Invalid ipv4 address: %s", optarg);
+ return -1;
+ }
+ break;
+ case 'h':
+ if (parse_mac (optarg, intf.hw_addr) != 0)
+ {
+ INFO ("Invalid mac address: %s", optarg);
+ return -1;
+ }
+ break;
+ case '?':
+ print_help ();
+ return 0;
+ case 'v':
+ print_version ();
+ return 0;
+ }
+ }
+
+ /** Create memif socket
+ *
+ * Interfaces are internally stored in a database referenced by memif socket.
+ */
+ sprintf (memif_socket_args.path, "%s", socket_path);
+ /* Set application name */
+ strncpy (memif_socket_args.app_name, APP_NAME, strlen (APP_NAME));
+
+ /* configure autoconnect timer */
+ if (is_master == 0)
+ {
+ memif_socket_args.connection_request_timer.it_value.tv_sec = 2;
+ memif_socket_args.connection_request_timer.it_value.tv_nsec = 0;
+ memif_socket_args.connection_request_timer.it_interval.tv_sec = 2;
+ memif_socket_args.connection_request_timer.it_interval.tv_nsec = 0;
+ }
+
+ err = memif_create_socket (&memif_socket, &memif_socket_args, NULL);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_create_socket: %s", memif_strerror (err));
+ goto error;
+ }
+
+ /** Create memif interfaces
+ *
+ * Both interaces are assigned the same socket and same id to create a
+ * loopback.
+ */
+
+ memif_conn_args.socket = memif_socket;
+ memif_conn_args.interface_id = id;
+ strncpy (memif_conn_args.interface_name, IF_NAME,
+ sizeof (memif_conn_args.interface_name));
+ memif_conn_args.is_master = is_master;
+
+ err =
+ memif_create (&intf.conn, &memif_conn_args, on_connect, on_disconnect,
+ is_master ? responder : responder_zero_copy, (void *) &intf);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_create_socket: %s", memif_strerror (err));
+ return err;
+ }
+
+ do
+ {
+ err = memif_poll_event (memif_socket, -1);
+ }
+ while (err == MEMIF_ERR_SUCCESS);
+
+ return 0;
+
+error:
+ ret = -1;
+done:
+ free_memif_buffers (&intf);
+ memif_delete (&intf.conn);
+ memif_delete_socket (&memif_socket);
+ return ret;
+}
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 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 <stdlib.h>
+#include <sys/types.h>
+#include <inttypes.h>
+#include <string.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include <libmemif.h>
+#include <common.h>
+
+#define APP_NAME "loopback_example"
+#define IF0_NAME "lo0"
+#define IF1_NAME "lo1"
+
+memif_connection_t intf0, intf1;
+int is_reverse;
+int epfd;
+
+int
+packet_generator (memif_connection_t *c, uint16_t num_pkts)
+{
+ int i, bi = 0;
+ memif_buffer_t *mb;
+
+ for (i = 0; (i < num_pkts) && (bi < c->tx_buf_num); i++)
+ {
+ mb = &c->tx_bufs[bi++];
+ memset (mb->data, 1, mb->len);
+ }
+
+ return 0;
+}
+
+/* informs user about connected status. private_ctx is used by user to identify
+ * connection */
+int
+on_connect (memif_conn_handle_t conn, void *private_ctx)
+{
+ INFO ("memif connected!");
+ int err;
+
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+
+ c->is_connected = 1;
+ alloc_memif_buffers (c);
+
+ err = memif_refill_queue (conn, 0, -1, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+ return err;
+ }
+
+ print_memif_details (c);
+
+ /* Once both interfaces are connected send a test packet, master -> slave.
+ * Slave will use zero-copy method to reply the same pakcet back.
+ * (Configured by assigning responder_zero_copy as on_interrupt callback.)
+ */
+ if ((intf0.is_connected == 1) && (intf1.is_connected == 1))
+ {
+ send_packets (is_reverse ? &intf1 : &intf0, 0, packet_generator, 1,
+ 2048);
+ }
+
+ return 0;
+}
+
+/* informs user about disconnected status. private_ctx is used by user to
+ * identify connection */
+int
+on_disconnect (memif_conn_handle_t conn, void *private_ctx)
+{
+ INFO ("memif disconnected!");
+
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+
+ c->is_connected = 0;
+ free_memif_buffers (c);
+
+ /* stop event polling thread */
+ int err = memif_cancel_poll_event (memif_get_socket_handle (conn));
+ if (err != MEMIF_ERR_SUCCESS)
+ INFO ("We are doomed...");
+
+ return 0;
+}
+
+int
+verify_packet (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
+{
+ memif_connection_t *c = (memif_connection_t *) private_ctx;
+ int err;
+ void *want;
+
+ err = memif_rx_burst (conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &c->rx_buf_num);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("meif_rx_burst: %s", memif_strerror (err));
+ return err;
+ }
+
+ want = malloc (c->rx_bufs[0].len);
+ if (want == NULL)
+ {
+ INFO ("Out of memory");
+ goto done;
+ }
+
+ memset (want, 1, c->rx_bufs[0].len);
+
+ err = memcmp (c->rx_bufs[0].data, want, c->rx_bufs[0].len);
+ if (err != 0)
+ {
+ INFO ("Received malformed data. ret: %d", err);
+ }
+ else
+ {
+ INFO ("Received correct data.");
+ }
+
+done:
+ err = memif_refill_queue (conn, qid, c->rx_buf_num, 0);
+ if (err != MEMIF_ERR_SUCCESS)
+ INFO ("memif_refill_queue: %s", memif_strerror (err));
+
+ /* stop polling and exit the program */
+ INFO ("Stopping the program");
+ err = memif_cancel_poll_event (memif_get_socket_handle (conn));
+ if (err != MEMIF_ERR_SUCCESS)
+ INFO ("We are doomed...");
+
+ return err;
+}
+
+int
+create_memif_interface (memif_socket_handle_t memif_socket,
+ const char *if_name, int id, uint8_t is_master,
+ memif_connection_t *ctx)
+{
+ memif_conn_args_t memif_conn_args = { 0 };
+ int err;
+
+ memif_conn_args.socket = memif_socket;
+ memif_conn_args.interface_id = id;
+ strncpy (memif_conn_args.interface_name, if_name,
+ sizeof (memif_conn_args.interface_name));
+ memif_conn_args.is_master = is_master;
+
+ err = memif_create (&ctx->conn, &memif_conn_args, on_connect, on_disconnect,
+ is_master ? verify_packet : responder_zero_copy,
+ (void *) ctx);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_create_socket: %s", memif_strerror (err));
+ return err;
+ }
+
+ return 0;
+}
+
+void
+print_help ()
+{
+ printf ("LIBMEMIF EXAMPLE APP: %s", APP_NAME);
+#ifdef ICMP_DBG
+ printf (" (debug)");
+#endif
+ printf ("\n");
+ printf ("==============================\n");
+ printf ("libmemif version: %s", LIBMEMIF_VERSION);
+#ifdef MEMIF_DBG
+ printf (" (debug)");
+#endif
+ printf ("\n");
+
+ printf ("memif version: %s\n", memif_get_version_str ());
+ printf ("==============================\n");
+ printf ("In this example, two memif endpoints are connected to create a "
+ "loopback.\n");
+ printf ("Once connected, a test packet is sent out the memif master "
+ "interface to\n");
+ printf (
+ "the memif slave interface, which replies with the same packet in a\n");
+ printf ("zero-copy way.\n");
+ printf (
+ "In reverse mode, the packet is sent from the slave interface and is\n");
+ printf ("looped back by the master interface.\n");
+ printf ("==============================\n");
+ printf ("Usage: loopback [OPTIONS]\n\n");
+ printf ("Options:\n");
+ printf ("\t-r\tReverse mode, verification packet is sent by slave.\n");
+ printf ("\t-?\tShow help and exit.\n");
+ printf ("\t-v\tShow libmemif and memif version information and exit.\n");
+}
+
+int
+main (int argc, char *argv[])
+{
+ memif_socket_args_t memif_socket_args = { 0 };
+ memif_socket_handle_t memif_socket;
+ int opt, err, ret = 0;
+ is_reverse = 0;
+
+ while ((opt = getopt (argc, argv, "r?v")) != -1)
+ {
+ switch (opt)
+ {
+ case 'r':
+ is_reverse = 1;
+ break;
+ case '?':
+ print_help ();
+ return 0;
+ case 'v':
+ print_version ();
+ return 0;
+ }
+ }
+
+ /** Create memif socket
+ *
+ * Interfaces are internally stored in a database referenced by memif socket.
+ */
+ /* Abstract socket supported */
+ memif_socket_args.path[0] = '@';
+ strncpy (memif_socket_args.path + 1, APP_NAME, strlen (APP_NAME));
+ /* Set application name */
+ strncpy (memif_socket_args.app_name, APP_NAME, strlen (APP_NAME));
+
+ err = memif_create_socket (&memif_socket, &memif_socket_args, NULL);
+ if (err != MEMIF_ERR_SUCCESS)
+ {
+ INFO ("memif_create_socket: %s", memif_strerror (err));
+ goto error;
+ }
+
+ /** Create memif interfaces
+ *
+ * Both interaces are assigned the same socket and same id to create a
+ * loopback.
+ */
+
+ /* prepare the private data */
+ memset (&intf0, 0, sizeof (intf0));
+ memset (&intf1, 0, sizeof (intf1));
+ if (is_reverse)
+ {
+ intf0.packet_handler = basic_packet_handler;
+ }
+ else
+ {
+ intf1.packet_handler = basic_packet_handler;
+ }
+
+ err =
+ create_memif_interface (memif_socket, IF0_NAME, 0, /* master */ 1, &intf0);
+ if (err != 0)
+ {
+ goto error;
+ }
+
+ err =
+ create_memif_interface (memif_socket, IF1_NAME, 0, /* slave */ 0, &intf1);
+ if (err != 0)
+ {
+ goto error;
+ }
+
+ do
+ {
+ err = memif_poll_event (memif_socket, -1);
+ }
+ while (err == MEMIF_ERR_SUCCESS);
+
+ return 0;
+
+error:
+ ret = -1;
+done:
+ free_memif_buffers (&intf0);
+ free_memif_buffers (&intf1);
+ memif_delete (&intf0.conn);
+ memif_delete (&intf1.conn);
+ memif_delete_socket (&memif_socket);
+ return ret;
+}
``/run/vpp/master.sock``. The example will handle ARP requests and
respond to ICMPv4 requests to ``192.168.1.1``.
-Continue with :ref:`libmemif_example_setup_doc` which contains instructions on
-how to set up connection between icmpr-epoll example app and VPP-memif.
-
+Continue with :ref:`libmemif_examples_doc` which contains instructions on
+how to set up connection between icmp_responder example app and VPP-memif.
Code Review / vpp.git / commitdiff