+++ /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 <stdlib.h>
-#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 <string.h>
-#include <sys/epoll.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-
-#include <libmemif.h>
-#include <icmp_proto.h>
-
-#define APP_NAME "ICMP_Responder"
-#define IF_NAME "memif_connection"
-
-
-#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
-
-typedef struct
-{
- uint16_t index;
- /* memif conenction handle */
- memif_conn_handle_t conn;
- /* 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;
- /* interface ip address */
- uint8_t ip_addr[4];
-} memif_connection_t;
-
-memif_connection_t memif_connection;
-int epfd;
-
-static void
-print_memif_details ()
-{
- memif_connection_t *c = &memif_connection;
- printf ("MEMIF DETAILS\n");
- printf ("==============================\n");
-
-
- memif_details_t md;
- memset (&md, 0, sizeof (md));
- ssize_t buflen = 2048;
- char *buf = 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 filename: %s\n", (char *) md.socket_filename);
- printf ("\tsocket filename: %s\n", (char *) md.socket_filename);
- 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);
-}
-
-/* informs user about connected status. private_ctx is used by user to identify connection
- (multiple connections WIP) */
-int
-on_connect (memif_conn_handle_t conn, void *private_ctx)
-{
- INFO ("memif connected!");
- return 0;
-}
-
-/* informs user about disconnected status. private_ctx is used by user to identify connection
- (multiple connections WIP) */
-int
-on_disconnect (memif_conn_handle_t conn, void *private_ctx)
-{
- INFO ("memif disconnected!");
- return 0;
-}
-
-int
-icmpr_memif_delete ()
-{
- int err;
- /* disconnect then delete memif connection */
- err = memif_delete (&(&memif_connection)->conn);
- if (err != MEMIF_ERR_SUCCESS)
- INFO ("memif_delete: %s", memif_strerror (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: %d\n", memif_get_version ());
- printf ("\tuse CTRL+C to exit\n");
-}
-
-int
-icmpr_buffer_alloc (long n, uint16_t qid)
-{
- memif_connection_t *c = &memif_connection;
- int err;
- uint16_t r;
- /* set data pointer to shared memory and set buffer_len to shared memory buffer len */
- err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, n, &r, 0);
- if (err != MEMIF_ERR_SUCCESS)
- {
- INFO ("memif_buffer_alloc: %s", memif_strerror (err));
- c->tx_buf_num += r;
- return -1;
- }
- c->tx_buf_num += r;
- DBG ("allocated %d/%ld buffers, %u free buffers", r, n,
- MAX_MEMIF_BUFS - c->tx_buf_num);
- return 0;
-}
-
-int
-icmpr_tx_burst (uint16_t qid)
-{
- memif_connection_t *c = &memif_connection;
- int err;
- uint16_t r;
- /* inform peer memif interface about data in shared memory buffers */
- /* mark memif buffers as free */
- err = memif_tx_burst (c->conn, qid, c->tx_bufs, c->tx_buf_num, &r);
- if (err != MEMIF_ERR_SUCCESS)
- INFO ("memif_tx_burst: %s", memif_strerror (err));
- DBG ("tx: %d/%u", r, c->tx_buf_num);
- c->tx_buf_num -= r;
- return 0;
-}
-
-int
-icmpr_free ()
-{
- /* application cleanup */
- int err;
- memif_connection_t *c = &memif_connection;
- free (c->tx_bufs);
- c->tx_bufs = NULL;
- free (c->rx_bufs);
- c->rx_bufs = NULL;
-
- err = memif_cleanup ();
- if (err != MEMIF_ERR_SUCCESS)
- INFO ("memif_delete: %s", memif_strerror (err));
-
- return 0;
-}
-
-void
-icmpr_exit (int sig)
-{
- printf ("\n");
- icmpr_memif_delete ();
- icmpr_free ();
- exit (EXIT_SUCCESS);
-}
-
-/* called when event is polled on interrupt file descriptor.
- there are packets in shared memory ready to be received */
-int
-on_interrupt (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
-{
- DBG ("interrupted");
- memif_connection_t *c = &memif_connection;
- int err;
- uint16_t rx;
- /* receive data from shared memory buffers */
- err = memif_rx_burst (c->conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &rx);
- c->rx_buf_num += rx;
-
- DBG ("received %d buffers. %u/%u alloc/free buffers",
- rx, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num);
-
- if (icmpr_buffer_alloc (rx, c->tx_qid) < 0)
- {
- INFO ("buffer_alloc error");
- goto error;
- }
- int i;
- for (i = 0; i < rx; i++)
- {
- resolve_packet ((void *) (c->rx_bufs + i)->data,
- (c->rx_bufs + i)->len,
- (void *) (c->tx_bufs + i)->data,
- &(c->tx_bufs + i)->len, c->ip_addr);
- }
-
- /* mark memif buffers and shared memory buffers as free */
- err = memif_refill_queue (c->conn, qid, rx, 0);
- /*
- * In this example we can assert that c->conn points to valid connection
- * and 'rx <= c->rx_buf_num'.
- */
- c->rx_buf_num -= rx;
-
- DBG ("freed %d buffers. %u/%u alloc/free buffers",
- rx, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num);
-
- icmpr_tx_burst (c->tx_qid);
-
- return 0;
-
-error:
- err = memif_refill_queue (c->conn, qid, rx, 0);
- if (err != MEMIF_ERR_SUCCESS)
- INFO ("memif_buffer_free: %s", memif_strerror (err));
- c->rx_buf_num -= rx;
- DBG ("freed %d buffers. %u/%u alloc/free buffers",
- rx, c->rx_buf_num, MAX_MEMIF_BUFS - c->rx_buf_num);
- return 0;
-}
-
-int
-icmpr_memif_create (int is_master)
-{
- /* setting memif connection arguments */
- memif_conn_args_t args;
- memset (&args, 0, sizeof (args));
- args.is_master = is_master;
- args.log2_ring_size = 10;
- args.buffer_size = 2048;
- args.num_s2m_rings = 2;
- args.num_m2s_rings = 2;
- strncpy ((char *) args.interface_name, IF_NAME, strlen (IF_NAME));
- args.mode = 0;
- /* socket filename is not specified, because this app is supposed to
- connect to VPP over memif. so default socket filename will be used */
- /* default socketfile = /run/vpp/memif.sock */
-
- args.interface_id = 0;
- /* last argument for memif_create (void * private_ctx) is used by user
- to identify connection. this context is returned with callbacks */
- int err = memif_create (&(&memif_connection)->conn,
- &args, on_connect, on_disconnect, on_interrupt,
- NULL);
- if (err != MEMIF_ERR_SUCCESS)
- INFO ("memif_create: %s", memif_strerror (err));
- return 0;
-}
-
-int
-main (int argc, char *argv[])
-{
- memif_connection_t *c = &memif_connection;
-
- signal (SIGINT, icmpr_exit);
-
- /* initialize global memif connection handle */
- c->conn = NULL;
- if (argc == 1)
- c->tx_qid = 0;
- else
- {
- char *end;
- c->tx_qid = strtol (argv[1], &end, 10);
- }
- INFO ("tx qid: %u", c->tx_qid);
- /* alloc memif buffers */
- c->rx_buf_num = 0;
- c->rx_bufs =
- (memif_buffer_t *) malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
- c->tx_buf_num = 0;
- c->tx_bufs =
- (memif_buffer_t *) malloc (sizeof (memif_buffer_t) * MAX_MEMIF_BUFS);
- c->ip_addr[0] = 192;
- c->ip_addr[1] = 168;
- c->ip_addr[2] = 1;
- c->ip_addr[3] = 2;
- /* initialize memory interface */
- int err;
- /* if valid callback is passed as argument, fd event polling will be done by user
- all file descriptors and events will be passed to user in this callback */
- /* if callback is set to NULL libmemif will handle fd event polling */
- err = memif_init (NULL, APP_NAME, NULL, NULL, NULL);
- if (err != MEMIF_ERR_SUCCESS)
- INFO ("memif_init: %s", memif_strerror (err));
-
- print_help ();
-
- icmpr_memif_create (0);
- print_memif_details ();
-
- /* main loop */
- while (1)
- {
- if (memif_poll_event (-1) < 0)
- {
- DBG ("poll_event error!");
- }
- }
-}
Code Review / vpp.git / blobdiff