libmemif: external region support
region 0: descriptors
region 1: buffers (external)
Change-Id: Ia728967817b4c78bc00f8eed44606d0c5bc386b0
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
diff --git a/extras/libmemif/examples/icmp_responder-eb/main.c b/extras/libmemif/examples/icmp_responder-eb/main.c
new file mode 100644
index 0000000..9e71d28
--- /dev/null
+++ b/extras/libmemif/examples/icmp_responder-eb/main.c
@@ -0,0 +1,1073 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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.
+ *------------------------------------------------------------------
+ */
+
+#define _GNU_SOURCE
+#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 /* TIME_UTC */
+
+#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 /* ICMP_DBG */
+
+#define INFO(...) do { \
+ printf("INFO: "__VA_ARGS__); \
+ printf("\n"); \
+ } while (0)
+
+#define MAX_MEMIF_BUFS 256
+#define MAX_CONNS 50
+
+
+#ifndef __NR_memfd_create
+#if defined __x86_64__
+#define __NR_memfd_create 319
+#elif defined __arm__
+#define __NR_memfd_create 385
+#elif defined __aarch64__
+#define __NR_memfd_create 279
+#else
+#error "__NR_memfd_create unknown for this architecture"
+#endif
+#endif
+
+#ifndef HAVE_MEMFD_CREATE
+static inline int
+memfd_create (const char *name, unsigned int flags)
+{
+ return syscall (__NR_memfd_create, name, flags);
+}
+#endif
+
+#ifndef F_LINUX_SPECIFIC_BASE
+#define F_LINUX_SPECIFIC_BASE 1024
+#endif
+
+#ifndef MFD_ALLOW_SEALING
+#define MFD_ALLOW_SEALING 0x0002U
+#endif
+
+#ifndef F_ADD_SEALS
+#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
+#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
+
+#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
+#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
+#define F_SEAL_GROW 0x0004 /* prevent file from growing */
+#define F_SEAL_WRITE 0x0008 /* prevent writes */
+#endif
+
+typedef struct
+{
+ uint16_t index;
+
+ memif_conn_handle_t conn;
+
+ uint16_t tx_buf_num;
+ uint16_t rx_buf_num;
+ memif_buffer_t *tx_bufs;
+ memif_buffer_t *rx_bufs;
+
+ uint8_t ip_addr[4];
+ 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;
+
+icmpr_thread_data_t icmpr_thread_data[MAX_CONNS];
+pthread_t thread[MAX_CONNS];
+int epfd;
+long ctx[MAX_CONNS];
+memif_connection_t memif_connection[MAX_CONNS];
+
+static 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> - create memif. index used as interface id. mode: 0 = slave | 1 = master. interrupt: none = default | 1 = handle ARP only\n");
+ printf ("\tdel <index> - delete memif\n");
+ printf ("\tshow - show connection details\n");
+ printf ("\tsend <index> <tx> <ip> <mac> - send icmp\n");
+}
+
+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 ("\tregions:\n");
+ for (e = 0; e < md.regions_num; e++)
+ {
+ printf ("\t\tindex: %u\n", md.regions[e].index);
+ printf ("\t\taddress: %p\n", md.regions[e].addr);
+ printf ("\t\tsize: %u\n", md.regions[e].size);
+ printf ("\t\tfd: %d\n", md.regions[e].fd);
+ if (md.regions[e].is_external)
+ printf ("\t\texternal\n");
+ }
+ 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");
+ }
+ free (buf);
+}
+
+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);
+ }
+}
+
+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->tx_err_counter = c->tx_counter = c->rx_counter = 0;
+ }
+}
+
+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 moddified 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;
+}
+
+int
+on_connect (memif_conn_handle_t conn, void *private_ctx)
+{
+ INFO ("memif connected!");
+ memif_refill_queue (conn, 0, -1, 0);
+ return 0;
+}
+
+int
+on_disconnect (memif_conn_handle_t conn, void *private_ctx)
+{
+ INFO ("memif disconnected!");
+ return 0;
+}
+
+int
+control_fd_update (int fd, uint8_t events)
+{
+ /* 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_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;
+ /* disconenct 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;
+}
+
+int
+icmpr_free ()
+{
+ /* application cleanup */
+ int err;
+ long i;
+ 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_add_external_region (void * *addr, uint32_t size, int *fd,
+ void *private_ctx)
+{
+
+ int rfd;
+ void *raddr;
+ int err;
+
+ rfd = memfd_create ("memif region 1", MFD_ALLOW_SEALING);
+
+ fcntl (rfd, F_ADD_SEALS, F_SEAL_SHRINK);
+
+ err = ftruncate (rfd, size);
+
+ raddr = mmap (NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, rfd, 0);
+
+ *addr = raddr;
+ *fd = rfd;
+
+ return 0;
+}
+
+void *
+icmpr_get_external_region_addr (uint32_t size, int fd, void *private_ctx)
+{
+ return mmap (NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+}
+
+int
+icmpr_del_external_region (void *addr, uint32_t size, int fd,
+ void *private_ctx)
+{
+ munmap (addr, size);
+ if (fd > 0)
+ close (fd);
+ fd = -1;
+ return 0;
+}
+
+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;
+ uint16_t fb = 0;
+ int i = 0;
+ int j = 0;
+
+ do
+ {
+ 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, 0);
+ 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, 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", fb, c->rx_buf_num,
+ MAX_MEMIF_BUFS - c->rx_buf_num);
+ return 0;
+}
+
+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;
+ uint16_t fb;
+ uint16_t pck_seq;
+
+ 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)
+ {
+ err =
+ memif_buffer_alloc (c->conn, qid, c->tx_bufs, 1, &tx, 128);
+ if ((err != MEMIF_ERR_SUCCESS) && (err != MEMIF_ERR_NOBUF_RING))
+ {
+ INFO ("memif_buffer_alloc: %s", memif_strerror (err));
+ goto error;
+ }
+ 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);
+ 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));
+ c->tx_buf_num -= tx;
+ c->tx_counter += tx;
+ }
+ }
+
+ 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;
+
+
+ }
+ while (ret_val == MEMIF_ERR_NOBUF);
+
+ 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",
+ fb, 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 ("...");
+ return 0;
+ }
+ memif_connection_t *c = &memif_connection[index];
+
+ memif_conn_args_t args;
+ int fd = -1;
+ 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;
+ args.interface_id = index;
+
+ int err;
+ 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, "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;
+ 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;
+
+done:
+ return 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.", index);
+ goto error;
+ }
+ 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", memif_strerror (err));
+ goto error;
+ }
+ c->tx_buf_num += tx;
+
+ while (tx)
+ {
+ while (tx > 4)
+ {
+ 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++);
+ generate_packet ((void *) c->tx_bufs[i + 2].data,
+ &c->tx_bufs[i + 2].len, c->ip_addr,
+ d->ip_daddr, d->hw_daddr, seq++);
+ generate_packet ((void *) c->tx_bufs[i + 3].data,
+ &c->tx_bufs[i + 3].len, c->ip_addr,
+ d->ip_daddr, d->hw_daddr, seq++);
+ i += 4;
+ tx -= 4;
+ }
+ 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", memif_strerror (err));
+ goto error;
+ }
+ c->tx_buf_num -= tx;
+ c->tx_counter += tx;
+ count -= tx;
+ }
+
+ timespec_get (&end, TIME_UTC);
+ INFO ("\n\nPacket sequence finished!\nSeq 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;
+ double tmp = t1;
+ tmp += t2 / 1e+9;
+ tmp = seq / tmp;
+ INFO ("Seq time: %lus %luns\nAverage pps: %f", t1, t2, tmp);
+
+error:
+ INFO ("Thread exiting...");
+ pthread_exit (NULL);
+}
+
+
+int
+icmpr_send (long index, long packet_num, char *hw, char *ip)
+{
+ if (index >= MAX_CONNS)
+ {
+ INFO ("connection array overflow");
+ return 0;
+ }
+ if (index < 0)
+ {
+ INFO ("...");
+ return 0;
+ }
+ memif_connection_t *c = &memif_connection[index];
+ if (c->conn == NULL)
+ return -1;
+ int err, i;
+ uint16_t tx = 0, rx = 0;
+ char *end, *ui;
+ uint8_t tmp[6];
+ icmpr_thread_data_t *data = &icmpr_thread_data[index];
+ data->index = index;
+ data->packet_num = packet_num;
+
+ 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);
+
+ 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, "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 if (strncmp (ui, "show", 4) == 0)
+ {
+ print_memif_details ();
+ goto done;
+ }
+
+done:
+ free (in);
+ return 0;
+}
+
+int
+poll_event (int timeout)
+{
+ struct epoll_event evt, *e;
+ int app_err = 0, memif_err = 0, en = 0;
+ int tmp, nfd;
+ uint32_t events = 0;
+ 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 */
+ 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 epolle 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);
+ }
+ }
+
+ 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);
+
+ /* 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;
+ }
+
+ memif_register_external_region (icmpr_add_external_region,
+ icmpr_get_external_region_addr,
+ icmpr_del_external_region, NULL);
+
+ print_help ();
+
+ /* main loop */
+ while (1)
+ {
+ if (poll_event (-1) < 0)
+ {
+ DBG ("poll_event error!");
+ }
+ }
+}