libmemif: refactor examples

- icmp_responder: responds to ICMPv4 and ARP requests
- loopback: connects two interfaces and sends a
  verification packet from master memif to slave memif
  where it is looped back
- loopback (reverse path): reverses direction of packet
  in loopback application (slave memif to master memif)

Type: refactor

Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Change-Id: Ie90aaa3367269408efb6c5d538ad5aa827432238
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

1 files changed, 192 insertions, 0 deletions

diff --git a/extras/libmemif/examples/common/common.c b/extras/libmemif/examples/common/common.c
new file mode 100644
index 00000000000..5af42eaf63b
--- /dev/null
+++ b/extras/libmemif/examples/common/common.c
@@ -0,0 +1,192 @@
+#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);
+}