summaryrefslogtreecommitdiffstats
path: root/extras/libmemif/examples/icmp_responder
diff options
context:
space:
mode:
Diffstat (limited to 'extras/libmemif/examples/icmp_responder')
-rw-r--r--extras/libmemif/examples/icmp_responder/main.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/extras/libmemif/examples/icmp_responder/main.c b/extras/libmemif/examples/icmp_responder/main.c
new file mode 100644
index 00000000000..32b8ed7579a
--- /dev/null
+++ b/extras/libmemif/examples/icmp_responder/main.c
@@ -0,0 +1,241 @@
+/*
+ *------------------------------------------------------------------
+ * 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;
+}