lib/librte_pmd_pcap/rte_eth_pcap.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <time.h>
  35 #include <rte_mbuf.h>
  36 #include <rte_ethdev.h>
  37 #include <rte_malloc.h>
  38 #include <rte_memcpy.h>
  39 #include <rte_string_fns.h>
  40 #include <rte_cycles.h>
  41
  42 #include "rte_eth_pcap.h"
  43 #include "rte_eth_pcap_arg_parser.h"
  44
  45 #define RTE_ETH_PCAP_SNAPSHOT_LEN 65535
  46 #define RTE_ETH_PCAP_SNAPLEN 4096
  47 #define RTE_ETH_PCAP_PROMISC 1
  48 #define RTE_ETH_PCAP_TIMEOUT -1
  49 #define RTE_ETH_PCAP_MBUFS 64
  50 #define ETH_PCAP_RX_PCAP_ARG    "rx_pcap"
  51 #define ETH_PCAP_TX_PCAP_ARG    "tx_pcap"
  52 #define ETH_PCAP_RX_IFACE_ARG   "rx_iface"
  53 #define ETH_PCAP_TX_IFACE_ARG   "tx_iface"
  54 #define ETH_PCAP_IFACE_ARG              "iface"
  55
  56 static char errbuf[PCAP_ERRBUF_SIZE];
  57 static struct timeval start_time;
  58 static uint64_t start_cycles;
  59 static uint64_t hz;
  60
  61 struct pcap_rx_queue {
  62         pcap_t *pcap;
  63         struct rte_mempool *mb_pool;
  64         volatile unsigned long rx_pkts;
  65         volatile unsigned long err_pkts;
  66 };
  67
  68 struct pcap_tx_queue {
  69         pcap_dumper_t *dumper;
  70         pcap_t *pcap;
  71         volatile unsigned long tx_pkts;
  72         volatile unsigned long err_pkts;
  73 };
  74
  75 struct rx_pcaps {
  76         unsigned num_of_rx;
  77         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  78 };
  79
  80 struct tx_pcaps {
  81         unsigned num_of_tx;
  82         pcap_dumper_t *dumpers[RTE_PMD_RING_MAX_TX_RINGS];
  83         pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
  84 };
  85
  86 struct pmd_internals {
  87         unsigned nb_rx_queues;
  88         unsigned nb_tx_queues;
  89
  90         struct pcap_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
  91         struct pcap_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
  92 };
  93
  94 const char *valid_arguments[] = {
  95         ETH_PCAP_RX_PCAP_ARG,
  96         ETH_PCAP_TX_PCAP_ARG,
  97         ETH_PCAP_RX_IFACE_ARG,
  98         ETH_PCAP_TX_IFACE_ARG,
  99         ETH_PCAP_IFACE_ARG,
 100         NULL
 101 };
 102
 103 static struct ether_addr eth_addr = { .addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 } };
 104 static const char *drivername = "Pcap PMD";
 105 static struct rte_eth_link pmd_link = {
 106                 .link_speed = 10000,
 107                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 108                 .link_status = 0
 109 };
 110
 111
 112 static uint16_t
 113 eth_pcap_rx(void *queue,
 114                 struct rte_mbuf **bufs,
 115                 uint16_t nb_pkts)
 116 {
 117         unsigned i;
 118         struct pcap_pkthdr header;
 119         const u_char *packet;
 120         struct rte_mbuf *mbuf;
 121         struct pcap_rx_queue *pcap_q = queue;
 122         struct rte_pktmbuf_pool_private *mbp_priv;
 123         uint16_t num_rx = 0;
 124         uint16_t buf_size;
 125
 126         if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0))
 127                 return 0;
 128
 129         /* Reads the given number of packets from the pcap file one by one
 130          * and copies the packet data into a newly allocated mbuf to return.
 131          */
 132         for (i = 0; i < nb_pkts; i++) {
 133                 /* Get the next PCAP packet */
 134                 packet = pcap_next(pcap_q->pcap, &header);
 135                 if (unlikely(packet == NULL))
 136                         break;
 137                 else
 138                         mbuf = rte_pktmbuf_alloc(pcap_q->mb_pool);
 139                 if (unlikely(mbuf == NULL))
 140                         break;
 141
 142                 /* Now get the space available for data in the mbuf */
 143                 mbp_priv = (struct rte_pktmbuf_pool_private *)
 144                                 ((char *)pcap_q->mb_pool + sizeof(struct rte_mempool));
 145                 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
 146                                 RTE_PKTMBUF_HEADROOM);
 147
 148                 if (header.len <= buf_size) {
 149                         /* pcap packet will fit in the mbuf, go ahead and copy */
 150                         rte_memcpy(mbuf->pkt.data, packet, header.len);
 151                         mbuf->pkt.data_len = (uint16_t)header.len;
 152                         mbuf->pkt.pkt_len = mbuf->pkt.data_len;
 153                         bufs[i] = mbuf;
 154                         num_rx++;
 155                 } else {
 156                         /* pcap packet will not fit in the mbuf, so drop packet */
 157                         RTE_LOG(ERR, PMD,
 158                                         "PCAP packet %d bytes will not fit in mbuf (%d bytes)\n",
 159                                         header.len, buf_size);
 160                         rte_pktmbuf_free(mbuf);
 161                 }
 162         }
 163         pcap_q->rx_pkts += num_rx;
 164         return num_rx;
 165 }
 166
 167 static inline void
 168 calculate_timestamp(struct timeval *ts) {
 169         uint64_t cycles;
 170         struct timeval cur_time;
 171
 172         cycles = rte_get_timer_cycles() - start_cycles;
 173         cur_time.tv_sec = cycles / hz;
 174         cur_time.tv_usec = (cycles % hz) * 10e6 / hz;
 175         timeradd(&start_time, &cur_time, ts);
 176 }
 177
 178 /*
 179  * Callback to handle writing packets to a pcap file.
 180  */
 181 static uint16_t
 182 eth_pcap_tx_dumper(void *queue,
 183                 struct rte_mbuf **bufs,
 184                 uint16_t nb_pkts)
 185 {
 186         unsigned i;
 187         struct rte_mbuf *mbuf;
 188         struct pcap_tx_queue *dumper_q = queue;
 189         uint16_t num_tx = 0;
 190         struct pcap_pkthdr header;
 191
 192         if (dumper_q->dumper == NULL || nb_pkts == 0)
 193                 return 0;
 194
 195         /* writes the nb_pkts packets to the previously opened pcap file dumper */
 196         for (i = 0; i < nb_pkts; i++) {
 197                 mbuf = bufs[i];
 198                 calculate_timestamp(&header.ts);
 199                 header.len = mbuf->pkt.data_len;
 200                 header.caplen = header.len;
 201                 pcap_dump((u_char*) dumper_q->dumper, &header, mbuf->pkt.data);
 202                 rte_pktmbuf_free(mbuf);
 203                 num_tx++;
 204         }
 205
 206         /*
 207          * Since there's no place to hook a callback when the forwarding
 208          * process stops and to make sure the pcap file is actually written,
 209          * we flush the pcap dumper within each burst.
 210          */
 211         pcap_dump_flush(dumper_q->dumper);
 212         dumper_q->tx_pkts += num_tx;
 213         dumper_q->err_pkts += nb_pkts - num_tx;
 214         return num_tx;
 215 }
 216
 217 /*
 218  * Callback to handle sending packets through a real NIC.
 219  */
 220 static uint16_t
 221 eth_pcap_tx(void *queue,
 222                 struct rte_mbuf **bufs,
 223                 uint16_t nb_pkts)
 224 {
 225         unsigned i;
 226         int ret;
 227         struct rte_mbuf *mbuf;
 228         struct pcap_tx_queue *tx_queue = queue;
 229         uint16_t num_tx = 0;
 230
 231         if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
 232                 return 0;
 233
 234         for (i = 0; i < nb_pkts; i++) {
 235                 mbuf = bufs[i];
 236                 ret = pcap_sendpacket(tx_queue->pcap, (u_char*) mbuf->pkt.data,
 237                                 mbuf->pkt.data_len);
 238                 if(likely(!ret))
 239                         num_tx++;
 240                 rte_pktmbuf_free(mbuf);
 241         }
 242
 243         tx_queue->tx_pkts += num_tx;
 244         tx_queue->err_pkts += nb_pkts - num_tx;
 245         return num_tx;
 246 }
 247
 248 static int
 249 eth_dev_start(struct rte_eth_dev *dev)
 250 {
 251         dev->data->dev_link.link_status = 1;
 252         return 0;
 253 }
 254
 255 /*
 256  * This function gets called when the current port gets stopped.
 257  * Is the only place for us to close all the tx streams dumpers.
 258  * If not called the dumpers will be flushed within each tx burst.
 259  */
 260 static void
 261 eth_dev_stop(struct rte_eth_dev *dev)
 262 {
 263         unsigned i;
 264         pcap_dumper_t *dumper;
 265         pcap_t *pcap;
 266         struct pmd_internals *internals = dev->data->dev_private;
 267
 268         for (i = 0; i < internals->nb_tx_queues; i++) {
 269                 dumper = internals->tx_queue[i].dumper;
 270                 if(dumper != NULL)
 271                         pcap_dump_close(dumper);
 272                 pcap = internals->tx_queue[i].pcap;
 273                 if(pcap != NULL)
 274                         pcap_close(pcap);
 275         }
 276
 277         dev->data->dev_link.link_status = 0;
 278 }
 279
 280 static int
 281 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 282 {
 283         return 0;
 284 }
 285
 286 static void
 287 eth_dev_info(struct rte_eth_dev *dev,
 288                 struct rte_eth_dev_info *dev_info)
 289 {
 290         struct pmd_internals *internals = dev->data->dev_private;
 291         dev_info->driver_name = drivername;
 292         dev_info->max_mac_addrs = 1;
 293         dev_info->max_rx_pktlen = (uint32_t) -1;
 294         dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
 295         dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
 296         dev_info->min_rx_bufsize = 0;
 297         dev_info->pci_dev = NULL;
 298 }
 299
 300 static void
 301 eth_stats_get(struct rte_eth_dev *dev,
 302                 struct rte_eth_stats *igb_stats)
 303 {
 304         unsigned i;
 305         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 306         const struct pmd_internals *internal = dev->data->dev_private;
 307
 308         memset(igb_stats, 0, sizeof(*igb_stats));
 309         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_rx_queues;
 310                         i++) {
 311                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 312                 rx_total += igb_stats->q_ipackets[i];
 313         }
 314
 315         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_tx_queues;
 316                         i++) {
 317                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 318                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 319                 tx_total += igb_stats->q_opackets[i];
 320                 tx_err_total += igb_stats->q_errors[i];
 321         }
 322
 323         igb_stats->ipackets = rx_total;
 324         igb_stats->opackets = tx_total;
 325         igb_stats->oerrors = tx_err_total;
 326 }
 327
 328 static void
 329 eth_stats_reset(struct rte_eth_dev *dev)
 330 {
 331         unsigned i;
 332         struct pmd_internals *internal = dev->data->dev_private;
 333         for (i = 0; i < internal->nb_rx_queues; i++)
 334                 internal->rx_queue[i].rx_pkts = 0;
 335         for (i = 0; i < internal->nb_tx_queues; i++) {
 336                 internal->tx_queue[i].tx_pkts = 0;
 337                 internal->tx_queue[i].err_pkts = 0;
 338         }
 339 }
 340
 341 static void
 342 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 343 {
 344 }
 345
 346 static void
 347 eth_queue_release(void *q __rte_unused)
 348 {
 349 }
 350
 351 static int
 352 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 353                 int wait_to_complete __rte_unused)
 354 {
 355         return 0;
 356 }
 357
 358 static int
 359 eth_rx_queue_setup(struct rte_eth_dev *dev,
 360                 uint16_t rx_queue_id,
 361                 uint16_t nb_rx_desc __rte_unused,
 362                 unsigned int socket_id __rte_unused,
 363                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 364                 struct rte_mempool *mb_pool)
 365 {
 366         struct pmd_internals *internals = dev->data->dev_private;
 367         struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id];
 368         pcap_q->mb_pool = mb_pool;
 369         dev->data->rx_queues[rx_queue_id] = pcap_q;
 370         return 0;
 371 }
 372
 373 static int
 374 eth_tx_queue_setup(struct rte_eth_dev *dev,
 375                 uint16_t tx_queue_id,
 376                 uint16_t nb_tx_desc __rte_unused,
 377                 unsigned int socket_id __rte_unused,
 378                 const struct rte_eth_txconf *tx_conf __rte_unused)
 379 {
 380
 381         struct pmd_internals *internals = dev->data->dev_private;
 382         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 383         return 0;
 384 }
 385
 386 static struct eth_dev_ops ops = {
 387                 .dev_start = eth_dev_start,
 388                 .dev_stop =     eth_dev_stop,
 389                 .dev_close = eth_dev_close,
 390                 .dev_configure = eth_dev_configure,
 391                 .dev_infos_get = eth_dev_info,
 392                 .rx_queue_setup = eth_rx_queue_setup,
 393                 .tx_queue_setup = eth_tx_queue_setup,
 394                 .rx_queue_release = eth_queue_release,
 395                 .tx_queue_release = eth_queue_release,
 396                 .link_update = eth_link_update,
 397                 .stats_get = eth_stats_get,
 398                 .stats_reset = eth_stats_reset,
 399 };
 400
 401 /*
 402  * Function handler that opens the pcap file for reading a stores a
 403  * reference of it for use it later on.
 404  */
 405 static int
 406 open_rx_pcap(char *value, void *extra_args)
 407 {
 408         unsigned i;
 409         char *pcap_filename = value;
 410         struct rx_pcaps *pcaps = extra_args;
 411         pcap_t *rx_pcap;
 412
 413         for (i = 0; i < pcaps->num_of_rx; i++) {
 414                 if ((rx_pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) {
 415                         RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf);
 416                         return -1;
 417                 }
 418                 pcaps->pcaps[i] = rx_pcap;
 419         }
 420
 421         return 0;
 422 }
 423
 424 /*
 425  * Opens a pcap file for writing and stores a reference to it
 426  * for use it later on.
 427  */
 428 static int
 429 open_tx_pcap(char *value, void *extra_args)
 430 {
 431         unsigned i;
 432         char *pcap_filename = value;
 433         struct tx_pcaps *dumpers = extra_args;
 434         pcap_t *tx_pcap;
 435         pcap_dumper_t *dumper;
 436
 437         for (i = 0; i < dumpers->num_of_tx; i++) {
 438                 /*
 439                  * We need to create a dummy empty pcap_t to use it
 440                  * with pcap_dump_open(). We create big enough an Ethernet
 441                  * pcap holder.
 442                  */
 443                 if ((tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN))
 444                                 == NULL) {
 445                         RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
 446                         return -1;
 447                 }
 448
 449                 /* The dumper is created using the previous pcap_t reference */
 450                 if ((dumper = pcap_dump_open(tx_pcap, pcap_filename)) == NULL) {
 451                         RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n", pcap_filename);
 452                         return -1;
 453                 }
 454                 dumpers->dumpers[i] = dumper;
 455         }
 456
 457         return 0;
 458 }
 459
 460 /*
 461  * pcap_open_live wrapper function
 462  */
 463 static inline int
 464 open_iface_live(const char *iface, pcap_t **pcap) {
 465         *pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN,
 466                         RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf);
 467
 468         if (*pcap == NULL) {
 469                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf);
 470                 return -1;
 471         }
 472         return 0;
 473 }
 474
 475 /*
 476  * Opens an interface for reading and writing
 477  */
 478 static inline int
 479 open_rx_tx_iface(char *value, void *extra_args)
 480 {
 481         const char *iface = value;
 482         pcap_t **pcap = extra_args;
 483
 484         if(open_iface_live(iface, pcap) < 0)
 485                 return -1;
 486         return 0;
 487 }
 488
 489 /*
 490  * Opens a NIC for reading packets from it
 491  */
 492 static inline int
 493 open_rx_iface(char *value, void *extra_args)
 494 {
 495         unsigned i;
 496         const char *iface = value;
 497         struct rx_pcaps *pcaps = extra_args;
 498         pcap_t *pcap = NULL;
 499
 500         for (i = 0; i < pcaps->num_of_rx; i++) {
 501                 if(open_iface_live(iface, &pcap) < 0)
 502                         return -1;
 503                 pcaps->pcaps[i] = pcap;
 504         }
 505
 506         return 0;
 507 }
 508
 509 /*
 510  * Opens a NIC for writing packets to it
 511  */
 512 static inline int
 513 open_tx_iface(char *value, void *extra_args)
 514 {
 515         unsigned i;
 516         const char *iface = value;
 517         struct tx_pcaps *pcaps = extra_args;
 518         pcap_t *pcap;
 519
 520         for (i = 0; i < pcaps->num_of_tx; i++) {
 521                 if(open_iface_live(iface, &pcap) < 0)
 522                         return -1;
 523                 pcaps->pcaps[i] = pcap;
 524         }
 525
 526         return 0;
 527 }
 528
 529
 530 static int
 531 rte_pmd_init_internals(const unsigned nb_rx_queues,
 532                 const unsigned nb_tx_queues,
 533                 const unsigned numa_node,
 534                 struct pmd_internals **internals,
 535                 struct rte_eth_dev **eth_dev)
 536 {
 537         struct rte_eth_dev_data *data = NULL;
 538         struct rte_pci_device *pci_dev = NULL;
 539
 540         RTE_LOG(INFO, PMD,
 541                         "Creating pcap-backed ethdev on numa socket %u\n", numa_node);
 542
 543         /* now do all data allocation - for eth_dev structure, dummy pci driver
 544          * and internal (private) data
 545          */
 546         data = rte_zmalloc_socket(NULL, sizeof(*data), 0, numa_node);
 547         if (data == NULL)
 548                 goto error;
 549
 550         pci_dev = rte_zmalloc_socket(NULL, sizeof(*pci_dev), 0, numa_node);
 551         if (pci_dev == NULL)
 552                 goto error;
 553
 554         *internals = rte_zmalloc_socket(NULL, sizeof(**internals), 0, numa_node);
 555         if (*internals == NULL)
 556                 goto error;
 557
 558         /* reserve an ethdev entry */
 559         *eth_dev = rte_eth_dev_allocate();
 560         if (*eth_dev == NULL)
 561                 goto error;
 562
 563         /* now put it all together
 564          * - store queue data in internals,
 565          * - store numa_node info in pci_driver
 566          * - point eth_dev_data to internals and pci_driver
 567          * - and point eth_dev structure to new eth_dev_data structure
 568          */
 569         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 570          * so the rings are local per-process */
 571
 572         (*internals)->nb_rx_queues = nb_rx_queues;
 573         (*internals)->nb_tx_queues = nb_tx_queues;
 574
 575         pci_dev->numa_node = numa_node;
 576
 577         data->dev_private = *internals;
 578         data->port_id = (*eth_dev)->data->port_id;
 579         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 580         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 581         data->dev_link = pmd_link;
 582         data->mac_addrs = &eth_addr;
 583
 584         (*eth_dev)->data = data;
 585         (*eth_dev)->dev_ops = &ops;
 586         (*eth_dev)->pci_dev = pci_dev;
 587
 588         return 0;
 589
 590         error: if (data)
 591                 rte_free(data);
 592         if (pci_dev)
 593                 rte_free(pci_dev);
 594         if (*internals)
 595                 rte_free(*internals);
 596         return -1;
 597 }
 598
 599 int
 600 rte_eth_from_pcaps_n_dumpers(pcap_t * const rx_queues[],
 601                 const unsigned nb_rx_queues,
 602                 pcap_dumper_t * const tx_queues[],
 603                 const unsigned nb_tx_queues,
 604                 const unsigned numa_node)
 605 {
 606         struct pmd_internals *internals = NULL;
 607         struct rte_eth_dev *eth_dev = NULL;
 608         unsigned i;
 609
 610         /* do some parameter checking */
 611         if (rx_queues == NULL && nb_rx_queues > 0)
 612                 return -1;
 613         if (tx_queues == NULL && nb_tx_queues > 0)
 614                 return -1;
 615
 616         if (rte_pmd_init_internals(nb_rx_queues, nb_tx_queues, numa_node,
 617                         &internals, &eth_dev) < 0)
 618                 return -1;
 619
 620         for (i = 0; i < nb_rx_queues; i++) {
 621                 internals->rx_queue->pcap = rx_queues[i];
 622         }
 623         for (i = 0; i < nb_tx_queues; i++) {
 624                 internals->tx_queue->dumper = tx_queues[i];
 625         }
 626
 627         eth_dev->rx_pkt_burst = eth_pcap_rx;
 628         eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
 629
 630         return 0;
 631 }
 632
 633 int
 634 rte_eth_from_pcaps(pcap_t * const rx_queues[],
 635                 const unsigned nb_rx_queues,
 636                 pcap_t * const tx_queues[],
 637                 const unsigned nb_tx_queues,
 638                 const unsigned numa_node)
 639 {
 640         struct pmd_internals *internals = NULL;
 641         struct rte_eth_dev *eth_dev = NULL;
 642         unsigned i;
 643
 644         /* do some parameter checking */
 645         if (rx_queues == NULL && nb_rx_queues > 0)
 646                 return -1;
 647         if (tx_queues == NULL && nb_tx_queues > 0)
 648                 return -1;
 649
 650         if (rte_pmd_init_internals(nb_rx_queues, nb_tx_queues, numa_node,
 651                         &internals, &eth_dev) < 0)
 652                 return -1;
 653
 654         for (i = 0; i < nb_rx_queues; i++) {
 655                 internals->rx_queue->pcap = rx_queues[i];
 656         }
 657         for (i = 0; i < nb_tx_queues; i++) {
 658                 internals->tx_queue->pcap = tx_queues[i];
 659         }
 660
 661         eth_dev->rx_pkt_burst = eth_pcap_rx;
 662         eth_dev->tx_pkt_burst = eth_pcap_tx;
 663
 664         return 0;
 665 }
 666
 667
 668 int
 669 rte_pmd_pcap_init(const char *name, const char *params)
 670 {
 671         unsigned numa_node, using_dumpers = 0;
 672         int ret;
 673         struct args_dict dict;
 674         struct rx_pcaps pcaps;
 675         struct tx_pcaps dumpers;
 676
 677         rte_eth_pcap_init_args_dict(&dict);
 678
 679         numa_node = rte_socket_id();
 680
 681         gettimeofday(&start_time, NULL);
 682         start_cycles = rte_get_timer_cycles();
 683         hz = rte_get_timer_hz();
 684
 685         if (rte_eth_pcap_parse_args(&dict, name, params, valid_arguments) < 0)
 686                 return -1;
 687
 688         /*
 689          * If iface argument is passed we open the NICs and use them for
 690          * reading / writing
 691          */
 692         if (rte_eth_pcap_num_of_args(&dict, ETH_PCAP_IFACE_ARG) == 1) {
 693
 694                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_IFACE_ARG,
 695                                 &open_rx_tx_iface, &pcaps.pcaps[0]);
 696                 if (ret < 0)
 697                         return -1;
 698
 699                 return rte_eth_from_pcaps(pcaps.pcaps, 1, pcaps.pcaps, 1, numa_node);
 700         }
 701
 702         /*
 703          * We check whether we want to open a RX stream from a real NIC or a
 704          * pcap file
 705          */
 706         if ((pcaps.num_of_rx = rte_eth_pcap_num_of_args(&dict, ETH_PCAP_RX_PCAP_ARG))) {
 707                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_RX_PCAP_ARG,
 708                                 &open_rx_pcap, &pcaps);
 709         } else {
 710                 pcaps.num_of_rx = rte_eth_pcap_num_of_args(&dict,
 711                                 ETH_PCAP_RX_IFACE_ARG);
 712                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_RX_IFACE_ARG,
 713                                 &open_rx_iface, &pcaps);
 714         }
 715
 716         if (ret < 0)
 717                 return -1;
 718
 719         /*
 720          * We check whether we want to open a TX stream to a real NIC or a
 721          * pcap file
 722          */
 723         if ((dumpers.num_of_tx = rte_eth_pcap_num_of_args(&dict,
 724                         ETH_PCAP_TX_PCAP_ARG))) {
 725                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_TX_PCAP_ARG,
 726                                 &open_tx_pcap, &dumpers);
 727                 using_dumpers = 1;
 728         } else {
 729                 dumpers.num_of_tx = rte_eth_pcap_num_of_args(&dict,
 730                                 ETH_PCAP_TX_IFACE_ARG);
 731                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_TX_IFACE_ARG,
 732                                 &open_tx_iface, &dumpers);
 733         }
 734
 735         if (ret < 0)
 736                 return -1;
 737
 738         if (using_dumpers)
 739                 return rte_eth_from_pcaps_n_dumpers(pcaps.pcaps, pcaps.num_of_rx,
 740                                 dumpers.dumpers, dumpers.num_of_tx, numa_node);
 741
 742         return rte_eth_from_pcaps(pcaps.pcaps, pcaps.num_of_rx, dumpers.pcaps,
 743                         dumpers.num_of_tx, numa_node);
 744
 745 }
 746