libmemif: remove old examples

Type: refactor

Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Change-Id: I2331f6fb43ca533afb32f7d448adda27b19689ac

1 files changed, 0 insertions, 1320 deletions

diff --git a/extras/libmemif/examples/icmp_responder-epoll/main.c b/extras/libmemif/examples/icmp_responder-epoll/main.c
deleted file mode 100644
index c2ea348d897..00000000000
--- a/extras/libmemif/examples/icmp_responder-epoll/main.c
+++ /dev/null
@@ -1,1320 +0,0 @@
-/*
- *------------------------------------------------------------------
- * 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 <pthread.h>
-
-#include <time.h>
-
-#ifndef TIME_UTC
-#define TIME_UTC 1
-#endif
-
-#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)
-#define LOG(...) do {                                               \
-                    if (enable_log) {                               \
-                        dprintf (out_fd, __VA_ARGS__);              \
-                        dprintf (out_fd, "\n");                     \
-                    }                                               \
-                } while (0)
-#define LOG_FILE "/tmp/memif_time_test.txt"
-#else
-#define DBG(...)
-#define LOG(...)
-#endif
-
-#define INFO(...) do {                                              \
-                    printf ("INFO: "__VA_ARGS__);                   \
-                    printf ("\n");                                  \
-                } while (0)
-
-
-/* maximum tx/rx memif buffers */
-#define MAX_MEMIF_BUFS  256
-#define MAX_CONNS       50
-
-#define ICMPR_HEADROOM	64
-
-int epfd;
-int out_fd;
-uint8_t enable_log;
-
-typedef struct
-{
-  uint16_t index;
-  /* memif connection handle */
-  memif_conn_handle_t conn;
-  /* 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;
-  /* allocated rx buffers counter */
-  /* number of rx buffers pointing to shared memory */
-  uint16_t rx_buf_num;
-  /* interface ip address */
-  uint8_t ip_addr[4];
-  uint16_t seq;
-  uint64_t tx_counter, rx_counter, tx_err_counter;
-  uint64_t t_sec, t_nsec;
-} memif_connection_t;
-
-typedef struct
-{
-  uint16_t index;
-  uint64_t packet_num;
-  uint8_t ip_daddr[4];
-  uint8_t hw_daddr[6];
-} icmpr_thread_data_t;
-
-memif_connection_t memif_connection[MAX_CONNS];
-icmpr_thread_data_t icmpr_thread_data[MAX_CONNS];
-pthread_t thread[MAX_CONNS];
-long ctx[MAX_CONNS];
-
-/* print details for all memif connections */
-static void
-print_memif_details ()
-{
-  memif_details_t md;
-  ssize_t buflen;
-  char *buf;
-  int err, i, e;
-  buflen = 2048;
-  buf = malloc (buflen);
-  printf ("MEMIF DETAILS\n");
-  printf ("==============================\n");
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memif_connection_t *c = &memif_connection[i];
-
-      memset (&md, 0, sizeof (md));
-      memset (buf, 0, buflen);
-
-      err = memif_get_details (c->conn, &md, buf, buflen);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  if (err != MEMIF_ERR_NOCONN)
-	    INFO ("%s", memif_strerror (err));
-	  continue;
-	}
-
-      printf ("interface index: %d\n", i);
-
-      printf ("\tinterface ip: %u.%u.%u.%u\n",
-	      c->ip_addr[0], c->ip_addr[1], c->ip_addr[2], c->ip_addr[3]);
-      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 ("\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\tring rx mode: %s\n",
-		  md.rx_queues[e].flags ? "polling" : "interrupt");
-	  printf ("\t\tring head: %u\n", md.rx_queues[e].head);
-	  printf ("\t\tring tail: %u\n", md.rx_queues[e].tail);
-	  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\tring rx mode: %s\n",
-		  md.tx_queues[e].flags ? "polling" : "interrupt");
-	  printf ("\t\tring head: %u\n", md.tx_queues[e].head);
-	  printf ("\t\tring tail: %u\n", md.tx_queues[e].tail);
-	  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");
-	  printf ("\treason: %s\n", md.error);
-	}
-    }
-  free (buf);
-}
-
-int
-add_epoll_fd (int fd, uint32_t events)
-{
-  if (fd < 0)
-    {
-      DBG ("invalid fd %d", fd);
-      return -1;
-    }
-  struct epoll_event evt;
-  memset (&evt, 0, sizeof (evt));
-  evt.events = events;
-  evt.data.fd = fd;
-  if (epoll_ctl (epfd, EPOLL_CTL_ADD, fd, &evt) < 0)
-    {
-      DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
-      return -1;
-    }
-  DBG ("fd %d added to epoll", fd);
-  return 0;
-}
-
-int
-mod_epoll_fd (int fd, uint32_t events)
-{
-  if (fd < 0)
-    {
-      DBG ("invalid fd %d", fd);
-      return -1;
-    }
-  struct epoll_event evt;
-  memset (&evt, 0, sizeof (evt));
-  evt.events = events;
-  evt.data.fd = fd;
-  if (epoll_ctl (epfd, EPOLL_CTL_MOD, fd, &evt) < 0)
-    {
-      DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
-      return -1;
-    }
-  DBG ("fd %d modified on epoll", fd);
-  return 0;
-}
-
-int
-del_epoll_fd (int fd)
-{
-  if (fd < 0)
-    {
-      DBG ("invalid fd %d", fd);
-      return -1;
-    }
-  struct epoll_event evt;
-  memset (&evt, 0, sizeof (evt));
-  if (epoll_ctl (epfd, EPOLL_CTL_DEL, fd, &evt) < 0)
-    {
-      DBG ("epoll_ctl: %s fd %d", strerror (errno), fd);
-      return -1;
-    }
-  DBG ("fd %d removed from epoll", fd);
-  return 0;
-}
-
-/* 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!");
-  memif_refill_queue (conn, 0, -1, ICMPR_HEADROOM);
-  enable_log = 1;
-  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;
-}
-
-/* user needs to watch new fd or stop watching fd that is about to be closed.
-    control fd will be modified during connection establishment to minimize CPU usage */
-int
-control_fd_update (int fd, uint8_t events, void *ctx)
-{
-  /* convert memif event definitions to epoll events */
-  if (events & MEMIF_FD_EVENT_DEL)
-    return del_epoll_fd (fd);
-
-  uint32_t evt = 0;
-  if (events & MEMIF_FD_EVENT_READ)
-    evt |= EPOLLIN;
-  if (events & MEMIF_FD_EVENT_WRITE)
-    evt |= EPOLLOUT;
-
-  if (events & MEMIF_FD_EVENT_MOD)
-    return mod_epoll_fd (fd, evt);
-
-  return add_epoll_fd (fd, evt);
-}
-
-int
-icmpr_buffer_alloc (long index, long n, uint16_t * r, uint16_t i,
-		    uint16_t qid)
-{
-  memif_connection_t *c = &memif_connection[index];
-  int err;
-  /* 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 + i, n, r, 128);
-  if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING))
-    {
-      INFO ("memif_buffer_alloc: %s", memif_strerror (err));
-      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 (long index, uint16_t qid)
-{
-  memif_connection_t *c = &memif_connection[index];
-  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));
-  c->tx_buf_num -= r;
-  c->tx_counter += r;
-  return 0;
-}
-
-/* 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)
-{
-  long index = *((long *) private_ctx);
-  memif_connection_t *c = &memif_connection[index];
-  if (c->index != index)
-    {
-      INFO ("invalid context: %ld/%u", index, c->index);
-      return 0;
-    }
-
-  int err = MEMIF_ERR_SUCCESS, ret_val;
-  uint16_t rx = 0, tx = 0;
-  int i = 0;			/* rx buffer iterator */
-  int j = 0;			/* tx buffer iterator */
-
-  /* loop while there are packets in shm */
-  do
-    {
-      /* receive data from shared memory buffers */
-      err = memif_rx_burst (c->conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &rx);
-      ret_val = err;
-      c->rx_counter += rx;
-      if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF))
-	{
-	  INFO ("memif_rx_burst: %s", memif_strerror (err));
-	  goto error;
-	}
-
-      i = 0;
-      memset (c->tx_bufs, 0, sizeof (memif_buffer_t) * rx);
-      err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, rx, &tx, 128);
-      if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING))
-	{
-	  INFO ("memif_buffer_alloc: %s", memif_strerror (err));
-	  goto error;
-	}
-      j = 0;
-      c->tx_err_counter += rx - tx;
-
-      while (tx)
-	{
-	  resolve_packet ((void *) (c->rx_bufs + i)->data,
-			  (c->rx_bufs + i)->len,
-			  (void *) (c->tx_bufs + j)->data,
-			  &(c->tx_bufs + j)->len, c->ip_addr);
-	  i++;
-	  j++;
-	  tx--;
-	}
-
-      err = memif_refill_queue (c->conn, qid, rx, ICMPR_HEADROOM);
-      if (err != MEMIF_ERR_SUCCESS)
-	INFO ("memif_buffer_free: %s", memif_strerror (err));
-      rx -= rx;
-
-      DBG ("%u/%u alloc/free buffers", rx, MAX_MEMIF_BUFS - rx);
-
-      err = memif_tx_burst (c->conn, qid, c->tx_bufs, j, &tx);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  INFO ("memif_tx_burst: %s", memif_strerror (err));
-	  goto error;
-	}
-      c->tx_counter += tx;
-
-    }
-  while (ret_val == MEMIF_ERR_NOBUF);
-
-  return 0;
-
-error:
-  err = memif_refill_queue (c->conn, qid, rx, ICMPR_HEADROOM);
-  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;
-}
-
-/* called when event is polled on interrupt file descriptor.
-    there are packets in shared memory ready to be received */
-/* dev test modification: loop until TX == RX (don't drop buffers) */
-int
-on_interrupt0 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
-{
-  long index = *((long *) private_ctx);
-  memif_connection_t *c = &memif_connection[index];
-  if (c->index != index)
-    {
-      INFO ("invalid context: %ld/%u", index, c->index);
-      return 0;
-    }
-
-  int err = MEMIF_ERR_SUCCESS, ret_val;
-  uint16_t rx = 0, tx = 0;
-  int i;			/* rx buffer iterator */
-  int j;			/* tx bufferiterator */
-
-  /* loop while there are packets in shm */
-  do
-    {
-      /* receive data from shared memory buffers */
-      err = memif_rx_burst (c->conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &rx);
-      ret_val = err;
-      c->rx_counter += rx;
-      if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF))
-	{
-	  INFO ("memif_rx_burst: %s", memif_strerror (err));
-	  goto error;
-	}
-
-      i = 0;
-
-      /* loop while there are RX buffers to be processed */
-      while (rx)
-	{
-
-	  /* try to alloc required number of buffers buffers */
-	  err = memif_buffer_alloc (c->conn, qid, c->tx_bufs, rx, &tx, 128);
-	  if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING))
-	    {
-	      INFO ("memif_buffer_alloc: %s", memif_strerror (err));
-	      goto error;
-	    }
-	  j = 0;
-
-	  /* process buffers */
-	  while (tx)
-	    {
-	      while (tx > 2)
-		{
-		  resolve_packet ((void *) (c->rx_bufs + i)->data,
-				  (c->rx_bufs + i)->len,
-				  (void *) (c->tx_bufs + j)->data,
-				  &(c->tx_bufs + j)->len, c->ip_addr);
-		  resolve_packet ((void *) (c->rx_bufs + i + 1)->data,
-				  (c->rx_bufs + i + 1)->len,
-				  (void *) (c->tx_bufs + j + 1)->data,
-				  &(c->tx_bufs + j + 1)->len, c->ip_addr);
-
-		  i += 2;
-		  j += 2;
-		  tx -= 2;
-		}
-	      resolve_packet ((void *) (c->rx_bufs + i)->data,
-			      (c->rx_bufs + i)->len,
-			      (void *) (c->tx_bufs + j)->data,
-			      &(c->tx_bufs + j)->len, c->ip_addr);
-	      i++;
-	      j++;
-	      tx--;
-	    }
-	  /* mark memif buffers and shared memory buffers as free */
-	  /* free processed buffers */
-	  err = memif_refill_queue (c->conn, qid, j, ICMPR_HEADROOM);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    INFO ("memif_buffer_free: %s", memif_strerror (err));
-	  rx -= j;
-
-	  DBG ("freed %d buffers. %u/%u alloc/free buffers",
-	       rx, rx, MAX_MEMIF_BUFS - rx);
-
-	  /* transmit allocated buffers */
-	  err = memif_tx_burst (c->conn, qid, c->tx_bufs, j, &tx);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    {
-	      INFO ("memif_tx_burst: %s", memif_strerror (err));
-	      goto error;
-	    }
-	  c->tx_counter += tx;
-
-	}
-
-    }
-  while (ret_val == MEMIF_ERR_NOBUF);
-
-  return 0;
-
-error:
-  err = memif_refill_queue (c->conn, qid, rx, ICMPR_HEADROOM);
-  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;
-}
-
-/* called when event is polled on interrupt file descriptor.
-    there are packets in shared memory ready to be received */
-/* dev test modification: handle only ARP requests */
-int
-on_interrupt1 (memif_conn_handle_t conn, void *private_ctx, uint16_t qid)
-{
-  long index = *((long *) private_ctx);
-  memif_connection_t *c = &memif_connection[index];
-  if (c->index != index)
-    {
-      INFO ("invalid context: %ld/%u", index, c->index);
-      return 0;
-    }
-
-  int err = MEMIF_ERR_SUCCESS, ret_val;
-  int i;
-  uint16_t rx, tx;
-
-  do
-    {
-      /* receive data from shared memory buffers */
-      err = memif_rx_burst (c->conn, qid, c->rx_bufs, MAX_MEMIF_BUFS, &rx);
-      ret_val = err;
-      if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF))
-	{
-	  INFO ("memif_rx_burst: %s", memif_strerror (err));
-	  goto error;
-	}
-      c->rx_buf_num += rx;
-      c->rx_counter += rx;
-
-      for (i = 0; i < rx; i++)
-	{
-	  if (((struct ether_header *) (c->rx_bufs + i)->data)->ether_type ==
-	      0x0608)
-	    {
-	      if (icmpr_buffer_alloc (c->index, 1, &tx, i, qid) < 0)
-		break;
-	      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);
-	      icmpr_tx_burst (c->index, qid);
-	    }
-	}
-
-      err = memif_refill_queue (c->conn, qid, rx, ICMPR_HEADROOM);
-      if (err != MEMIF_ERR_SUCCESS)
-	INFO ("memif_buffer_free: %s", memif_strerror (err));
-      c->rx_buf_num -= rx;
-
-
-    }
-  while (ret_val == MEMIF_ERR_NOBUF);
-
-  return 0;
-
-error:
-  err = memif_refill_queue (c->conn, qid, rx, ICMPR_HEADROOM);
-  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 (long index, long mode, char *s)
-{
-  if (index >= MAX_CONNS)
-    {
-      INFO ("connection array overflow");
-      return 0;
-    }
-  if (index < 0)
-    {
-      INFO ("don't even try...");
-      return 0;
-    }
-  memif_connection_t *c = &memif_connection[index];
-
-  /* setting memif connection arguments */
-  memif_conn_args_t args;
-  memset (&args, 0, sizeof (args));
-  args.is_master = mode;
-  args.log2_ring_size = 11;
-  args.buffer_size = 2048;
-  args.num_s2m_rings = 1;
-  args.num_m2s_rings = 1;
-  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 = index;
-  /* last argument for memif_create (void * private_ctx) is used by user
-     to identify connection. this context is returned with callbacks */
-  int err;
-  /* default interrupt */
-  if (s == NULL)
-    {
-      err = memif_create (&c->conn,
-			  &args, on_connect, on_disconnect, on_interrupt,
-			  &ctx[index]);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  INFO ("memif_create: %s", memif_strerror (err));
-	  return 0;
-	}
-    }
-  else
-    {
-      if (strncmp (s, "0", 1) == 0)
-	{
-	  err = memif_create (&c->conn,
-			      &args, on_connect, on_disconnect, on_interrupt0,
-			      &ctx[index]);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    {
-	      INFO ("memif_create: %s", memif_strerror (err));
-	      return 0;
-	    }
-	}
-      else if (strncmp (s, "1", 1) == 0)
-	{
-	  err = memif_create (&c->conn,
-			      &args, on_connect, on_disconnect, on_interrupt1,
-			      &ctx[index]);
-	  if (err != MEMIF_ERR_SUCCESS)
-	    {
-	      INFO ("memif_create: %s", memif_strerror (err));
-	      return 0;
-	    }
-	}
-      else
-	{
-	  INFO ("Unknown interrupt descriptor");
-	  goto done;
-	}
-    }
-
-  c->index = index;
-  /* 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] = c->index + 1;
-  c->ip_addr[3] = 2;
-
-  c->seq = c->tx_err_counter = c->tx_counter = c->rx_counter = 0;
-
-done:
-  return 0;
-}
-
-int
-icmpr_memif_delete (long index)
-{
-  if (index >= MAX_CONNS)
-    {
-      INFO ("connection array overflow");
-      return 0;
-    }
-  if (index < 0)
-    {
-      INFO ("don't even try...");
-      return 0;
-    }
-  memif_connection_t *c = &memif_connection[index];
-
-  if (c->rx_bufs)
-    free (c->rx_bufs);
-  c->rx_bufs = NULL;
-  c->rx_buf_num = 0;
-  if (c->tx_bufs)
-    free (c->tx_bufs);
-  c->tx_bufs = NULL;
-  c->tx_buf_num = 0;
-
-  int err;
-  /* disconnect then delete memif connection */
-  err = memif_delete (&c->conn);
-  if (err != MEMIF_ERR_SUCCESS)
-    INFO ("memif_delete: %s", memif_strerror (err));
-  if (c->conn != NULL)
-    INFO ("memif delete fail");
-  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 ("commands:\n");
-  printf ("\thelp - prints this help\n");
-  printf ("\texit - exit app\n");
-  printf
-    ("\tconn <index> <mode> [<interrupt-desc>] - create memif. index is also used as interface id, mode 0 = slave 1 = master, interrupt-desc none = default 0 = if ring is full wait 1 = handle only ARP requests\n");
-  printf ("\tdel  <index> - delete memif\n");
-  printf ("\tshow - show connection details\n");
-  printf ("\tip-set <index> <ip-addr> - set interface ip address\n");
-  printf
-    ("\trx-mode <index> <qid> <polling|interrupt> - set queue rx mode\n");
-  printf ("\tsh-count - print counters\n");
-  printf ("\tcl-count - clear counters\n");
-  printf ("\tsend <index> <tx> <ip> <mac> - send icmp\n");
-}
-
-int
-icmpr_free ()
-{
-  /* application cleanup */
-  int err;
-  long i;
-  if (out_fd > 0)
-    close (out_fd);
-  out_fd = -1;
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memif_connection_t *c = &memif_connection[i];
-      if (c->conn)
-	icmpr_memif_delete (i);
-    }
-
-  err = memif_cleanup ();
-  if (err != MEMIF_ERR_SUCCESS)
-    INFO ("memif_delete: %s", memif_strerror (err));
-
-  return 0;
-}
-
-int
-icmpr_set_ip (long index, char *ip)
-{
-  if (index >= MAX_CONNS)
-    {
-      INFO ("connection array overflow");
-      return 0;
-    }
-  if (index < 0)
-    {
-      INFO ("don't even try...");
-      return 0;
-    }
-  memif_connection_t *c = &memif_connection[index];
-  if (c->conn == NULL)
-    {
-      INFO ("no connection at index %ld", index);
-      return 0;
-    }
-
-  char *end;
-  char *ui;
-  uint8_t tmp[4];
-  ui = strtok (ip, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[0] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[1] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[2] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[3] = strtol (ui, &end, 10);
-
-  c->ip_addr[0] = tmp[0];
-  c->ip_addr[1] = tmp[1];
-  c->ip_addr[2] = tmp[2];
-  c->ip_addr[3] = tmp[3];
-
-  INFO ("memif %ld ip address set to %u.%u.%u.%u",
-	index, c->ip_addr[0], c->ip_addr[1], c->ip_addr[2], c->ip_addr[3]);
-
-  return 0;
-
-error:
-  INFO ("invalid ip address");
-  return 0;
-}
-
-int
-icmpr_set_rx_mode (long index, long qid, char *mode)
-{
-  if (index >= MAX_CONNS)
-    {
-      INFO ("connection array overflow");
-      return 0;
-    }
-  if (index < 0)
-    {
-      INFO ("don't even try...");
-      return 0;
-    }
-  memif_connection_t *c = &memif_connection[index];
-
-  if (c->conn == NULL)
-    {
-      INFO ("no connection at index %ld", index);
-      return 0;
-    }
-
-  if (strncmp (mode, "interrupt", 9) == 0)
-    {
-      memif_set_rx_mode (c->conn, MEMIF_RX_MODE_INTERRUPT, qid);
-    }
-
-  else if (strncmp (mode, "polling", 7) == 0)
-    {
-      memif_set_rx_mode (c->conn, MEMIF_RX_MODE_POLLING, qid);
-    }
-  else
-    INFO ("expected rx mode <interrupt|polling>");
-  return 0;
-}
-
-void
-icmpr_print_counters ()
-{
-  int i;
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memif_connection_t *c = &memif_connection[i];
-      if (c->conn == NULL)
-	continue;
-      printf ("===============================\n");
-      printf ("interface index: %d\n", c->index);
-      printf ("\trx: %lu\n", c->rx_counter);
-      printf ("\ttx: %lu\n", c->tx_counter);
-      printf ("\ttx_err: %lu\n", c->tx_err_counter);
-      printf ("\tts: %lus %luns\n", c->t_sec, c->t_nsec);
-    }
-}
-
-void
-icmpr_reset_counters ()
-{
-  int i;
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memif_connection_t *c = &memif_connection[i];
-      if (c->conn == NULL)
-	continue;
-      c->t_sec = c->t_nsec = c->tx_err_counter = c->tx_counter =
-	c->rx_counter = 0;
-    }
-}
-
-void *
-icmpr_send_proc (void *data)
-{
-  icmpr_thread_data_t *d = (icmpr_thread_data_t *) data;
-  int index = d->index;
-  uint64_t count = d->packet_num;
-  memif_connection_t *c = &memif_connection[index];
-  if (c->conn == NULL)
-    {
-      INFO ("No connection at index %d. Thread exiting...\n", index);
-      pthread_exit (NULL);
-    }
-  uint16_t tx, i;
-  int err = MEMIF_ERR_SUCCESS;
-  uint32_t seq = 0;
-  struct timespec start, end;
-  memset (&start, 0, sizeof (start));
-  memset (&end, 0, sizeof (end));
-
-  timespec_get (&start, TIME_UTC);
-  while (count)
-    {
-      i = 0;
-      err = memif_buffer_alloc (c->conn, 0, c->tx_bufs,
-				MAX_MEMIF_BUFS >
-				count ? count : MAX_MEMIF_BUFS, &tx, 128);
-      if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING))
-	{
-	  INFO ("memif_buffer_alloc: %s Thread exiting...\n",
-		memif_strerror (err));
-	  pthread_exit (NULL);
-	}
-      c->tx_buf_num += tx;
-
-      while (tx)
-	{
-	  while (tx > 2)
-	    {
-	      generate_packet ((void *) c->tx_bufs[i].data,
-			       &c->tx_bufs[i].len, c->ip_addr,
-			       d->ip_daddr, d->hw_daddr, seq++);
-	      generate_packet ((void *) c->tx_bufs[i + 1].data,
-			       &c->tx_bufs[i + 1].len, c->ip_addr,
-			       d->ip_daddr, d->hw_daddr, seq++);
-	      i += 2;
-	      tx -= 2;
-	    }
-	  generate_packet ((void *) c->tx_bufs[i].data,
-			   &c->tx_bufs[i].len, c->ip_addr,
-			   d->ip_daddr, d->hw_daddr, seq++);
-	  i++;
-	  tx--;
-	}
-      err = memif_tx_burst (c->conn, 0, c->tx_bufs, c->tx_buf_num, &tx);
-      if (err != MEMIF_ERR_SUCCESS)
-	{
-	  INFO ("memif_tx_burst: %s Thread exiting...\n",
-		memif_strerror (err));
-	  pthread_exit (NULL);
-	}
-      c->tx_buf_num -= tx;
-      c->tx_counter += tx;
-      count -= tx;
-    }
-  timespec_get (&end, TIME_UTC);
-  printf ("\n\n");
-  INFO ("Packet sequence finished!");
-  INFO ("Seq len: %u", seq);
-  uint64_t t1 = end.tv_sec - start.tv_sec;
-  uint64_t t2;
-  if (end.tv_nsec > start.tv_nsec)
-    {
-      t2 = end.tv_nsec - start.tv_nsec;
-    }
-  else
-    {
-      t2 = start.tv_nsec - end.tv_nsec;
-      t1--;
-    }
-  c->t_sec = t1;
-  c->t_nsec = t2;
-  INFO ("Seq time: %lus %luns", t1, t2);
-  double tmp = t1;
-  tmp += t2 / 1e+9;
-  tmp = seq / tmp;
-  INFO ("Average pps: %f", tmp);
-  INFO ("Thread exiting...");
-  pthread_exit (NULL);
-}
-
-int
-icmpr_send (long index, long packet_num, char *hw, char *ip)
-{
-  memif_connection_t *c = &memif_connection[index];
-  char *end;
-  char *ui;
-  uint8_t tmp[6];
-  if (c->conn == NULL)
-    return -1;
-  c->seq = 0;
-  icmpr_thread_data_t *data = &icmpr_thread_data[index];
-  data->index = index;
-  data->packet_num = packet_num;
-  INFO ("PN: %lu", data->packet_num);
-  printf ("%s\n", ip);
-  printf ("%s\n", hw);
-
-  ui = strtok (ip, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[0] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[1] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[2] = strtol (ui, &end, 10);
-
-  ui = strtok (NULL, ".");
-  if (ui == NULL)
-    goto error;
-  tmp[3] = strtol (ui, &end, 10);
-
-  data->ip_daddr[0] = tmp[0];
-  data->ip_daddr[1] = tmp[1];
-  data->ip_daddr[2] = tmp[2];
-  data->ip_daddr[3] = tmp[3];
-
-  ui = strtok (hw, ":");
-  if (ui == NULL)
-    goto error;
-  tmp[0] = strtol (ui, &end, 16);
-  ui = strtok (NULL, ":");
-  if (ui == NULL)
-    goto error;
-  tmp[1] = strtol (ui, &end, 16);
-  ui = strtok (NULL, ":");
-  if (ui == NULL)
-    goto error;
-  tmp[2] = strtol (ui, &end, 16);
-  ui = strtok (NULL, ":");
-  if (ui == NULL)
-    goto error;
-  tmp[3] = strtol (ui, &end, 16);
-  ui = strtok (NULL, ":");
-  if (ui == NULL)
-    goto error;
-  tmp[4] = strtol (ui, &end, 16);
-  ui = strtok (NULL, ":");
-  if (ui == NULL)
-    goto error;
-  tmp[5] = strtol (ui, &end, 16);
-
-  data->hw_daddr[0] = tmp[0];
-  data->hw_daddr[1] = tmp[1];
-  data->hw_daddr[2] = tmp[2];
-  data->hw_daddr[3] = tmp[3];
-  data->hw_daddr[4] = tmp[4];
-  data->hw_daddr[5] = tmp[5];
-
-  pthread_create (&thread[index], NULL, icmpr_send_proc, (void *) data);
-  return 0;
-
-error:
-  INFO ("Invalid input\n");
-  return 0;
-}
-
-int
-user_input_handler ()
-{
-  char *in = (char *) malloc (256);
-  char *ui = fgets (in, 256, stdin);
-  char *end;
-  long a;
-  if (in[0] == '\n')
-    goto done;
-  ui = strtok (in, " ");
-  if (strncmp (ui, "exit", 4) == 0)
-    {
-      free (in);
-      icmpr_free ();
-      exit (EXIT_SUCCESS);
-    }
-  else if (strncmp (ui, "help", 4) == 0)
-    {
-      print_help ();
-      goto done;
-    }
-  else if (strncmp (ui, "conn", 4) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	a = strtol (ui, &end, 10);
-      else
-	{
-	  INFO ("expected id");
-	  goto done;
-	}
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_memif_create (a, strtol (ui, &end, 10), strtok (NULL, " "));
-      else
-	INFO ("expected mode <0|1>");
-      goto done;
-    }
-  else if (strncmp (ui, "del", 3) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_memif_delete (strtol (ui, &end, 10));
-      else
-	INFO ("expected id");
-      goto done;
-    }
-  else if (strncmp (ui, "show", 4) == 0)
-    {
-      print_memif_details ();
-      goto done;
-    }
-  else if (strncmp (ui, "ip-set", 6) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_set_ip (strtol (ui, &end, 10), strtok (NULL, " "));
-      else
-	INFO ("expected id");
-      goto done;
-    }
-  else if (strncmp (ui, "rx-mode", 7) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	a = strtol (ui, &end, 10);
-      else
-	{
-	  INFO ("expected id");
-	  goto done;
-	}
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_set_rx_mode (a, strtol (ui, &end, 10), strtok (NULL, " "));
-      else
-	INFO ("expected qid");
-      goto done;
-    }
-  else if (strncmp (ui, "sh-count", 8) == 0)
-    {
-      icmpr_print_counters ();
-    }
-  else if (strncmp (ui, "cl-count", 8) == 0)
-    {
-      icmpr_reset_counters ();
-    }
-  else if (strncmp (ui, "send", 4) == 0)
-    {
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	a = strtol (ui, &end, 10);
-      else
-	{
-	  INFO ("expected id");
-	  goto done;
-	}
-      ui = strtok (NULL, " ");
-      if (ui != NULL)
-	icmpr_send (a, strtol (ui, &end, 10), strtok (NULL, " "),
-		    strtok (NULL, " "));
-      else
-	INFO ("expected count");
-      goto done;
-    }
-  else
-    {
-      INFO ("unknown command: %s", ui);
-      goto done;
-    }
-
-  return 0;
-done:
-  free (in);
-  return 0;
-}
-
-int
-poll_event (int timeout)
-{
-  struct epoll_event evt;
-  int app_err = 0, memif_err = 0, en = 0;
-  uint32_t events = 0;
-  struct timespec start, end;
-  memset (&evt, 0, sizeof (evt));
-  evt.events = EPOLLIN | EPOLLOUT;
-  sigset_t sigset;
-  sigemptyset (&sigset);
-  en = epoll_pwait (epfd, &evt, 1, timeout, &sigset);
-  /* id event polled */
-  timespec_get (&start, TIME_UTC);
-  if (en < 0)
-    {
-      DBG ("epoll_pwait: %s", strerror (errno));
-      return -1;
-    }
-  if (en > 0)
-    {
-      /* this app does not use any other file descriptors than stds and memif control fds */
-      if (evt.data.fd > 2)
-	{
-	  /* event of memif control fd */
-	  /* convert epoll events to memif events */
-	  if (evt.events & EPOLLIN)
-	    events |= MEMIF_FD_EVENT_READ;
-	  if (evt.events & EPOLLOUT)
-	    events |= MEMIF_FD_EVENT_WRITE;
-	  if (evt.events & EPOLLERR)
-	    events |= MEMIF_FD_EVENT_ERROR;
-	  memif_err = memif_control_fd_handler (evt.data.fd, events);
-	  if (memif_err != MEMIF_ERR_SUCCESS)
-	    INFO ("memif_control_fd_handler: %s", memif_strerror (memif_err));
-	}
-      else if (evt.data.fd == 0)
-	{
-	  app_err = user_input_handler ();
-	}
-      else
-	{
-	  DBG ("unexpected event at memif_epfd. fd %d", evt.data.fd);
-	}
-    }
-
-  timespec_get (&end, TIME_UTC);
-  LOG ("interrupt: %ld", end.tv_nsec - start.tv_nsec);
-
-  if ((app_err < 0) || (memif_err < 0))
-    {
-      if (app_err < 0)
-	DBG ("user input handler error");
-      if (memif_err < 0)
-	DBG ("memif control fd handler error");
-      return -1;
-    }
-
-  return 0;
-}
-
-int
-main ()
-{
-  epfd = epoll_create (1);
-  add_epoll_fd (0, EPOLLIN);
-
-#ifdef LOG_FILE
-  remove (LOG_FILE);
-  enable_log = 0;
-
-  out_fd = open (LOG_FILE, O_WRONLY | O_CREAT, S_IRWXO);
-  if (out_fd < 0)
-    INFO ("Error opening log file: %s", strerror (errno));
-#endif /* LOG_FILE */
-
-  /* initialize memory interface */
-  int err, i;
-  /* 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 (control_fd_update, APP_NAME, NULL, NULL, NULL);
-  if (err != MEMIF_ERR_SUCCESS)
-    {
-      INFO ("memif_init: %s", memif_strerror (err));
-      icmpr_free ();
-      exit (-1);
-    }
-
-  for (i = 0; i < MAX_CONNS; i++)
-    {
-      memset (&memif_connection[i], 0, sizeof (memif_connection_t));
-      ctx[i] = i;
-    }
-
-  print_help ();
-
-  /* main loop */
-  while (1)
-    {
-      if (poll_event (-1) < 0)
-	{
-	  DBG ("poll_event error!");
-	}
-    }
-}