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 =  rte_mempool_get_priv(pcap_q->mb_pool);
 144                 buf_size = (uint16_t) (mbp_priv->mbuf_data_room_size -
 145                                 RTE_PKTMBUF_HEADROOM);
 146
 147                 if (header.len <= buf_size) {
 148                         /* pcap packet will fit in the mbuf, go ahead and copy */
 149                         rte_memcpy(mbuf->pkt.data, packet, header.len);
 150                         mbuf->pkt.data_len = (uint16_t)header.len;
 151                         mbuf->pkt.pkt_len = mbuf->pkt.data_len;
 152                         bufs[i] = mbuf;
 153                         num_rx++;
 154                 } else {
 155                         /* pcap packet will not fit in the mbuf, so drop packet */
 156                         RTE_LOG(ERR, PMD,
 157                                         "PCAP packet %d bytes will not fit in mbuf (%d bytes)\n",
 158                                         header.len, buf_size);
 159                         rte_pktmbuf_free(mbuf);
 160                 }
 161         }
 162         pcap_q->rx_pkts += num_rx;
 163         return num_rx;
 164 }
 165
 166 static inline void
 167 calculate_timestamp(struct timeval *ts) {
 168         uint64_t cycles;
 169         struct timeval cur_time;
 170
 171         cycles = rte_get_timer_cycles() - start_cycles;
 172         cur_time.tv_sec = cycles / hz;
 173         cur_time.tv_usec = (cycles % hz) * 10e6 / hz;
 174         timeradd(&start_time, &cur_time, ts);
 175 }
 176
 177 /*
 178  * Callback to handle writing packets to a pcap file.
 179  */
 180 static uint16_t
 181 eth_pcap_tx_dumper(void *queue,
 182                 struct rte_mbuf **bufs,
 183                 uint16_t nb_pkts)
 184 {
 185         unsigned i;
 186         struct rte_mbuf *mbuf;
 187         struct pcap_tx_queue *dumper_q = queue;
 188         uint16_t num_tx = 0;
 189         struct pcap_pkthdr header;
 190
 191         if (dumper_q->dumper == NULL || nb_pkts == 0)
 192                 return 0;
 193
 194         /* writes the nb_pkts packets to the previously opened pcap file dumper */
 195         for (i = 0; i < nb_pkts; i++) {
 196                 mbuf = bufs[i];
 197                 calculate_timestamp(&header.ts);
 198                 header.len = mbuf->pkt.data_len;
 199                 header.caplen = header.len;
 200                 pcap_dump((u_char*) dumper_q->dumper, &header, mbuf->pkt.data);
 201                 rte_pktmbuf_free(mbuf);
 202                 num_tx++;
 203         }
 204
 205         /*
 206          * Since there's no place to hook a callback when the forwarding
 207          * process stops and to make sure the pcap file is actually written,
 208          * we flush the pcap dumper within each burst.
 209          */
 210         pcap_dump_flush(dumper_q->dumper);
 211         dumper_q->tx_pkts += num_tx;
 212         dumper_q->err_pkts += nb_pkts - num_tx;
 213         return num_tx;
 214 }
 215
 216 /*
 217  * Callback to handle sending packets through a real NIC.
 218  */
 219 static uint16_t
 220 eth_pcap_tx(void *queue,
 221                 struct rte_mbuf **bufs,
 222                 uint16_t nb_pkts)
 223 {
 224         unsigned i;
 225         int ret;
 226         struct rte_mbuf *mbuf;
 227         struct pcap_tx_queue *tx_queue = queue;
 228         uint16_t num_tx = 0;
 229
 230         if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL))
 231                 return 0;
 232
 233         for (i = 0; i < nb_pkts; i++) {
 234                 mbuf = bufs[i];
 235                 ret = pcap_sendpacket(tx_queue->pcap, (u_char*) mbuf->pkt.data,
 236                                 mbuf->pkt.data_len);
 237                 if(likely(!ret))
 238                         num_tx++;
 239                 rte_pktmbuf_free(mbuf);
 240         }
 241
 242         tx_queue->tx_pkts += num_tx;
 243         tx_queue->err_pkts += nb_pkts - num_tx;
 244         return num_tx;
 245 }
 246
 247 static int
 248 eth_dev_start(struct rte_eth_dev *dev)
 249 {
 250         dev->data->dev_link.link_status = 1;
 251         return 0;
 252 }
 253
 254 /*
 255  * This function gets called when the current port gets stopped.
 256  * Is the only place for us to close all the tx streams dumpers.
 257  * If not called the dumpers will be flushed within each tx burst.
 258  */
 259 static void
 260 eth_dev_stop(struct rte_eth_dev *dev)
 261 {
 262         unsigned i;
 263         pcap_dumper_t *dumper;
 264         pcap_t *pcap;
 265         struct pmd_internals *internals = dev->data->dev_private;
 266
 267         for (i = 0; i < internals->nb_tx_queues; i++) {
 268                 dumper = internals->tx_queue[i].dumper;
 269                 if(dumper != NULL)
 270                         pcap_dump_close(dumper);
 271                 pcap = internals->tx_queue[i].pcap;
 272                 if(pcap != NULL)
 273                         pcap_close(pcap);
 274         }
 275
 276         dev->data->dev_link.link_status = 0;
 277 }
 278
 279 static int
 280 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 281 {
 282         return 0;
 283 }
 284
 285 static void
 286 eth_dev_info(struct rte_eth_dev *dev,
 287                 struct rte_eth_dev_info *dev_info)
 288 {
 289         struct pmd_internals *internals = dev->data->dev_private;
 290         dev_info->driver_name = drivername;
 291         dev_info->max_mac_addrs = 1;
 292         dev_info->max_rx_pktlen = (uint32_t) -1;
 293         dev_info->max_rx_queues = (uint16_t)internals->nb_rx_queues;
 294         dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
 295         dev_info->min_rx_bufsize = 0;
 296         dev_info->pci_dev = NULL;
 297 }
 298
 299 static void
 300 eth_stats_get(struct rte_eth_dev *dev,
 301                 struct rte_eth_stats *igb_stats)
 302 {
 303         unsigned i;
 304         unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
 305         const struct pmd_internals *internal = dev->data->dev_private;
 306
 307         memset(igb_stats, 0, sizeof(*igb_stats));
 308         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_rx_queues;
 309                         i++) {
 310                 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
 311                 rx_total += igb_stats->q_ipackets[i];
 312         }
 313
 314         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && i < internal->nb_tx_queues;
 315                         i++) {
 316                 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
 317                 igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
 318                 tx_total += igb_stats->q_opackets[i];
 319                 tx_err_total += igb_stats->q_errors[i];
 320         }
 321
 322         igb_stats->ipackets = rx_total;
 323         igb_stats->opackets = tx_total;
 324         igb_stats->oerrors = tx_err_total;
 325 }
 326
 327 static void
 328 eth_stats_reset(struct rte_eth_dev *dev)
 329 {
 330         unsigned i;
 331         struct pmd_internals *internal = dev->data->dev_private;
 332         for (i = 0; i < internal->nb_rx_queues; i++)
 333                 internal->rx_queue[i].rx_pkts = 0;
 334         for (i = 0; i < internal->nb_tx_queues; i++) {
 335                 internal->tx_queue[i].tx_pkts = 0;
 336                 internal->tx_queue[i].err_pkts = 0;
 337         }
 338 }
 339
 340 static void
 341 eth_dev_close(struct rte_eth_dev *dev __rte_unused)
 342 {
 343 }
 344
 345 static void
 346 eth_queue_release(void *q __rte_unused)
 347 {
 348 }
 349
 350 static int
 351 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 352                 int wait_to_complete __rte_unused)
 353 {
 354         return 0;
 355 }
 356
 357 static int
 358 eth_rx_queue_setup(struct rte_eth_dev *dev,
 359                 uint16_t rx_queue_id,
 360                 uint16_t nb_rx_desc __rte_unused,
 361                 unsigned int socket_id __rte_unused,
 362                 const struct rte_eth_rxconf *rx_conf __rte_unused,
 363                 struct rte_mempool *mb_pool)
 364 {
 365         struct pmd_internals *internals = dev->data->dev_private;
 366         struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id];
 367         pcap_q->mb_pool = mb_pool;
 368         dev->data->rx_queues[rx_queue_id] = pcap_q;
 369         return 0;
 370 }
 371
 372 static int
 373 eth_tx_queue_setup(struct rte_eth_dev *dev,
 374                 uint16_t tx_queue_id,
 375                 uint16_t nb_tx_desc __rte_unused,
 376                 unsigned int socket_id __rte_unused,
 377                 const struct rte_eth_txconf *tx_conf __rte_unused)
 378 {
 379
 380         struct pmd_internals *internals = dev->data->dev_private;
 381         dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
 382         return 0;
 383 }
 384
 385 static struct eth_dev_ops ops = {
 386                 .dev_start = eth_dev_start,
 387                 .dev_stop =     eth_dev_stop,
 388                 .dev_close = eth_dev_close,
 389                 .dev_configure = eth_dev_configure,
 390                 .dev_infos_get = eth_dev_info,
 391                 .rx_queue_setup = eth_rx_queue_setup,
 392                 .tx_queue_setup = eth_tx_queue_setup,
 393                 .rx_queue_release = eth_queue_release,
 394                 .tx_queue_release = eth_queue_release,
 395                 .link_update = eth_link_update,
 396                 .stats_get = eth_stats_get,
 397                 .stats_reset = eth_stats_reset,
 398 };
 399
 400 /*
 401  * Function handler that opens the pcap file for reading a stores a
 402  * reference of it for use it later on.
 403  */
 404 static int
 405 open_rx_pcap(char *value, void *extra_args)
 406 {
 407         unsigned i;
 408         char *pcap_filename = value;
 409         struct rx_pcaps *pcaps = extra_args;
 410         pcap_t *rx_pcap;
 411
 412         for (i = 0; i < pcaps->num_of_rx; i++) {
 413                 if ((rx_pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) {
 414                         RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf);
 415                         return -1;
 416                 }
 417                 pcaps->pcaps[i] = rx_pcap;
 418         }
 419
 420         return 0;
 421 }
 422
 423 /*
 424  * Opens a pcap file for writing and stores a reference to it
 425  * for use it later on.
 426  */
 427 static int
 428 open_tx_pcap(char *value, void *extra_args)
 429 {
 430         unsigned i;
 431         char *pcap_filename = value;
 432         struct tx_pcaps *dumpers = extra_args;
 433         pcap_t *tx_pcap;
 434         pcap_dumper_t *dumper;
 435
 436         for (i = 0; i < dumpers->num_of_tx; i++) {
 437                 /*
 438                  * We need to create a dummy empty pcap_t to use it
 439                  * with pcap_dump_open(). We create big enough an Ethernet
 440                  * pcap holder.
 441                  */
 442                 if ((tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN))
 443                                 == NULL) {
 444                         RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
 445                         return -1;
 446                 }
 447
 448                 /* The dumper is created using the previous pcap_t reference */
 449                 if ((dumper = pcap_dump_open(tx_pcap, pcap_filename)) == NULL) {
 450                         RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n", pcap_filename);
 451                         return -1;
 452                 }
 453                 dumpers->dumpers[i] = dumper;
 454         }
 455
 456         return 0;
 457 }
 458
 459 /*
 460  * pcap_open_live wrapper function
 461  */
 462 static inline int
 463 open_iface_live(const char *iface, pcap_t **pcap) {
 464         *pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN,
 465                         RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf);
 466
 467         if (*pcap == NULL) {
 468                 RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf);
 469                 return -1;
 470         }
 471         return 0;
 472 }
 473
 474 /*
 475  * Opens an interface for reading and writing
 476  */
 477 static inline int
 478 open_rx_tx_iface(char *value, void *extra_args)
 479 {
 480         const char *iface = value;
 481         pcap_t **pcap = extra_args;
 482
 483         if(open_iface_live(iface, pcap) < 0)
 484                 return -1;
 485         return 0;
 486 }
 487
 488 /*
 489  * Opens a NIC for reading packets from it
 490  */
 491 static inline int
 492 open_rx_iface(char *value, void *extra_args)
 493 {
 494         unsigned i;
 495         const char *iface = value;
 496         struct rx_pcaps *pcaps = extra_args;
 497         pcap_t *pcap = NULL;
 498
 499         for (i = 0; i < pcaps->num_of_rx; i++) {
 500                 if(open_iface_live(iface, &pcap) < 0)
 501                         return -1;
 502                 pcaps->pcaps[i] = pcap;
 503         }
 504
 505         return 0;
 506 }
 507
 508 /*
 509  * Opens a NIC for writing packets to it
 510  */
 511 static inline int
 512 open_tx_iface(char *value, void *extra_args)
 513 {
 514         unsigned i;
 515         const char *iface = value;
 516         struct tx_pcaps *pcaps = extra_args;
 517         pcap_t *pcap;
 518
 519         for (i = 0; i < pcaps->num_of_tx; i++) {
 520                 if(open_iface_live(iface, &pcap) < 0)
 521                         return -1;
 522                 pcaps->pcaps[i] = pcap;
 523         }
 524
 525         return 0;
 526 }
 527
 528
 529 static int
 530 rte_pmd_init_internals(const unsigned nb_rx_queues,
 531                 const unsigned nb_tx_queues,
 532                 const unsigned numa_node,
 533                 struct pmd_internals **internals,
 534                 struct rte_eth_dev **eth_dev)
 535 {
 536         struct rte_eth_dev_data *data = NULL;
 537         struct rte_pci_device *pci_dev = NULL;
 538
 539         RTE_LOG(INFO, PMD,
 540                         "Creating pcap-backed ethdev on numa socket %u\n", numa_node);
 541
 542         /* now do all data allocation - for eth_dev structure, dummy pci driver
 543          * and internal (private) data
 544          */
 545         data = rte_zmalloc_socket(NULL, sizeof(*data), 0, numa_node);
 546         if (data == NULL)
 547                 goto error;
 548
 549         pci_dev = rte_zmalloc_socket(NULL, sizeof(*pci_dev), 0, numa_node);
 550         if (pci_dev == NULL)
 551                 goto error;
 552
 553         *internals = rte_zmalloc_socket(NULL, sizeof(**internals), 0, numa_node);
 554         if (*internals == NULL)
 555                 goto error;
 556
 557         /* reserve an ethdev entry */
 558         *eth_dev = rte_eth_dev_allocate();
 559         if (*eth_dev == NULL)
 560                 goto error;
 561
 562         /* now put it all together
 563          * - store queue data in internals,
 564          * - store numa_node info in pci_driver
 565          * - point eth_dev_data to internals and pci_driver
 566          * - and point eth_dev structure to new eth_dev_data structure
 567          */
 568         /* NOTE: we'll replace the data element, of originally allocated eth_dev
 569          * so the rings are local per-process */
 570
 571         (*internals)->nb_rx_queues = nb_rx_queues;
 572         (*internals)->nb_tx_queues = nb_tx_queues;
 573
 574         pci_dev->numa_node = numa_node;
 575
 576         data->dev_private = *internals;
 577         data->port_id = (*eth_dev)->data->port_id;
 578         data->nb_rx_queues = (uint16_t)nb_rx_queues;
 579         data->nb_tx_queues = (uint16_t)nb_tx_queues;
 580         data->dev_link = pmd_link;
 581         data->mac_addrs = &eth_addr;
 582
 583         (*eth_dev)->data = data;
 584         (*eth_dev)->dev_ops = &ops;
 585         (*eth_dev)->pci_dev = pci_dev;
 586
 587         return 0;
 588
 589         error: if (data)
 590                 rte_free(data);
 591         if (pci_dev)
 592                 rte_free(pci_dev);
 593         if (*internals)
 594                 rte_free(*internals);
 595         return -1;
 596 }
 597
 598 int
 599 rte_eth_from_pcaps_n_dumpers(pcap_t * const rx_queues[],
 600                 const unsigned nb_rx_queues,
 601                 pcap_dumper_t * const tx_queues[],
 602                 const unsigned nb_tx_queues,
 603                 const unsigned numa_node)
 604 {
 605         struct pmd_internals *internals = NULL;
 606         struct rte_eth_dev *eth_dev = NULL;
 607         unsigned i;
 608
 609         /* do some parameter checking */
 610         if (rx_queues == NULL && nb_rx_queues > 0)
 611                 return -1;
 612         if (tx_queues == NULL && nb_tx_queues > 0)
 613                 return -1;
 614
 615         if (rte_pmd_init_internals(nb_rx_queues, nb_tx_queues, numa_node,
 616                         &internals, &eth_dev) < 0)
 617                 return -1;
 618
 619         for (i = 0; i < nb_rx_queues; i++) {
 620                 internals->rx_queue->pcap = rx_queues[i];
 621         }
 622         for (i = 0; i < nb_tx_queues; i++) {
 623                 internals->tx_queue->dumper = tx_queues[i];
 624         }
 625
 626         eth_dev->rx_pkt_burst = eth_pcap_rx;
 627         eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
 628
 629         return 0;
 630 }
 631
 632 int
 633 rte_eth_from_pcaps(pcap_t * const rx_queues[],
 634                 const unsigned nb_rx_queues,
 635                 pcap_t * const tx_queues[],
 636                 const unsigned nb_tx_queues,
 637                 const unsigned numa_node)
 638 {
 639         struct pmd_internals *internals = NULL;
 640         struct rte_eth_dev *eth_dev = NULL;
 641         unsigned i;
 642
 643         /* do some parameter checking */
 644         if (rx_queues == NULL && nb_rx_queues > 0)
 645                 return -1;
 646         if (tx_queues == NULL && nb_tx_queues > 0)
 647                 return -1;
 648
 649         if (rte_pmd_init_internals(nb_rx_queues, nb_tx_queues, numa_node,
 650                         &internals, &eth_dev) < 0)
 651                 return -1;
 652
 653         for (i = 0; i < nb_rx_queues; i++) {
 654                 internals->rx_queue->pcap = rx_queues[i];
 655         }
 656         for (i = 0; i < nb_tx_queues; i++) {
 657                 internals->tx_queue->pcap = tx_queues[i];
 658         }
 659
 660         eth_dev->rx_pkt_burst = eth_pcap_rx;
 661         eth_dev->tx_pkt_burst = eth_pcap_tx;
 662
 663         return 0;
 664 }
 665
 666
 667 int
 668 rte_pmd_pcap_init(const char *name, const char *params)
 669 {
 670         unsigned numa_node, using_dumpers = 0;
 671         int ret;
 672         struct args_dict dict;
 673         struct rx_pcaps pcaps;
 674         struct tx_pcaps dumpers;
 675
 676         rte_eth_pcap_init_args_dict(&dict);
 677
 678         numa_node = rte_socket_id();
 679
 680         gettimeofday(&start_time, NULL);
 681         start_cycles = rte_get_timer_cycles();
 682         hz = rte_get_timer_hz();
 683
 684         if (rte_eth_pcap_parse_args(&dict, name, params, valid_arguments) < 0)
 685                 return -1;
 686
 687         /*
 688          * If iface argument is passed we open the NICs and use them for
 689          * reading / writing
 690          */
 691         if (rte_eth_pcap_num_of_args(&dict, ETH_PCAP_IFACE_ARG) == 1) {
 692
 693                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_IFACE_ARG,
 694                                 &open_rx_tx_iface, &pcaps.pcaps[0]);
 695                 if (ret < 0)
 696                         return -1;
 697
 698                 return rte_eth_from_pcaps(pcaps.pcaps, 1, pcaps.pcaps, 1, numa_node);
 699         }
 700
 701         /*
 702          * We check whether we want to open a RX stream from a real NIC or a
 703          * pcap file
 704          */
 705         if ((pcaps.num_of_rx = rte_eth_pcap_num_of_args(&dict, ETH_PCAP_RX_PCAP_ARG))) {
 706                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_RX_PCAP_ARG,
 707                                 &open_rx_pcap, &pcaps);
 708         } else {
 709                 pcaps.num_of_rx = rte_eth_pcap_num_of_args(&dict,
 710                                 ETH_PCAP_RX_IFACE_ARG);
 711                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_RX_IFACE_ARG,
 712                                 &open_rx_iface, &pcaps);
 713         }
 714
 715         if (ret < 0)
 716                 return -1;
 717
 718         /*
 719          * We check whether we want to open a TX stream to a real NIC or a
 720          * pcap file
 721          */
 722         if ((dumpers.num_of_tx = rte_eth_pcap_num_of_args(&dict,
 723                         ETH_PCAP_TX_PCAP_ARG))) {
 724                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_TX_PCAP_ARG,
 725                                 &open_tx_pcap, &dumpers);
 726                 using_dumpers = 1;
 727         } else {
 728                 dumpers.num_of_tx = rte_eth_pcap_num_of_args(&dict,
 729                                 ETH_PCAP_TX_IFACE_ARG);
 730                 ret = rte_eth_pcap_post_process_arguments(&dict, ETH_PCAP_TX_IFACE_ARG,
 731                                 &open_tx_iface, &dumpers);
 732         }
 733
 734         if (ret < 0)
 735                 return -1;
 736
 737         if (using_dumpers)
 738                 return rte_eth_from_pcaps_n_dumpers(pcaps.pcaps, pcaps.num_of_rx,
 739                                 dumpers.dumpers, dumpers.num_of_tx, numa_node);
 740
 741         return rte_eth_from_pcaps(pcaps.pcaps, pcaps.num_of_rx, dumpers.pcaps,
 742                         dumpers.num_of_tx, numa_node);
 743
 744 }
 745