src/trafgen.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * By Daniel Borkmann <daniel@netsniff-ng.org>
   4  * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   5  * Swiss federal institute of technology (ETH Zurich)
   6  * Subject to the GPL, version 2.
   7  *
   8  * A high-performance network traffic generator that uses the zero-copy
   9  * kernelspace TX_RING for network I/O. On comodity Gigabit hardware up
  10  * to 1,488,095 pps 64 Byte pps have been achieved with 2 trafgen instances
  11  * bound to different CPUs from the userspace and turned off pause frames,
  12  * ask Ronald from NST (Network Security Toolkit) for more details. ;-)
  13  * So, this line-rate result is the very same as pktgen from kernelspace!
  14  *
  15  *   Who can now hold the fords when the King of the Nine Riders comes? And
  16  *   other armies will come. I am too late. All is lost. I tarried on the
  17  *   way. All is lost. Even if my errand is performed, no one will ever
  18  *   know. There will be no one I can tell. It will be in vain.
  19  *
  20  *     -- The Lord of the Rings, Frodo thinking,
  21  *        Chapter 'The Stairs of Cirith Ungol'.
  22  */
  23
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <getopt.h>
  27 #include <ctype.h>
  28 #include <stdbool.h>
  29 #include <sys/socket.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <sys/time.h>
  33 #include <signal.h>
  34 #include <stdint.h>
  35 #include <stdlib.h>
  36 #include <fcntl.h>
  37 #include <time.h>
  38 #include <net/ethernet.h>
  39
  40 #include "xmalloc.h"
  41 #include "die.h"
  42 #include "mac80211.h"
  43 #include "xutils.h"
  44 #include "xio.h"
  45 #include "trafgen_conf.h"
  46 #include "tprintf.h"
  47 #include "mtrand.h"
  48 #include "ring_tx.h"
  49
  50 struct stats {
  51         unsigned long tx_bytes;
  52         unsigned long tx_packets;
  53 };
  54
  55 struct mode {
  56 #define CPU_UNKNOWN  -1
  57 #define CPU_NOTOUCH  -2
  58         struct stats stats;
  59         char *device;
  60         char *device_trans;
  61         int cpu;
  62         int rand;
  63         int rfraw;
  64         unsigned long kpull;
  65         /* 0 for automatic, > 0 for manual */
  66         unsigned int reserve_size;
  67         int jumbo_support;
  68         int verbose;
  69         unsigned long num;
  70         unsigned long gap;
  71 };
  72
  73 static int sock;
  74 static struct itimerval itimer;
  75 static unsigned long interval = TX_KERNEL_PULL_INT;
  76
  77 sig_atomic_t sigint = 0;
  78
  79 struct packet *packets = NULL;
  80 unsigned int packets_len = 0;
  81
  82 struct packet_dynamics *packet_dyns = NULL;
  83 unsigned int packet_dyn_len = 0;
  84
  85 static const char *short_options = "d:c:n:t:vJhS:HQb:B:rk:i:o:VRA";
  86 static const struct option long_options[] = {
  87         {"dev",                 required_argument,      NULL, 'd'},
  88         {"out",                 required_argument,      NULL, 'o'},
  89         {"in",                  required_argument,      NULL, 'i'},
  90         {"conf",                required_argument,      NULL, 'c'},
  91         {"num",                 required_argument,      NULL, 'n'},
  92         {"gap",                 required_argument,      NULL, 't'},
  93         {"ring-size",           required_argument,      NULL, 'S'},
  94         {"bind-cpu",            required_argument,      NULL, 'b'},
  95         {"unbind-cpu",          required_argument,      NULL, 'B'},
  96         {"kernel-pull",         required_argument,      NULL, 'k'},
  97         {"jumbo-support",       no_argument,            NULL, 'J'},
  98         {"rfraw",               no_argument,            NULL, 'R'},
  99         {"rand",                no_argument,            NULL, 'r'},
 100         {"prio-high",           no_argument,            NULL, 'H'},
 101         {"notouch-irq",         no_argument,            NULL, 'Q'},
 102         {"verbose",             no_argument,            NULL, 'V'},
 103         {"no-sock-mem",         no_argument,            NULL, 'A'},
 104         {"version",             no_argument,            NULL, 'v'},
 105         {"help",                no_argument,            NULL, 'h'},
 106         {NULL, 0, NULL, 0}
 107 };
 108
 109 static void signal_handler(int number)
 110 {
 111         switch (number) {
 112         case SIGINT:
 113                 sigint = 1;
 114                 break;
 115         case SIGHUP:
 116         default:
 117                 break;
 118         }
 119 }
 120
 121 static void timer_elapsed(int number)
 122 {
 123         itimer.it_interval.tv_sec = 0;
 124         itimer.it_interval.tv_usec = interval;
 125         itimer.it_value.tv_sec = 0;
 126         itimer.it_value.tv_usec = interval;
 127
 128         pull_and_flush_tx_ring(sock);
 129         setitimer(ITIMER_REAL, &itimer, NULL);
 130 }
 131
 132 static void header(void)
 133 {
 134         printf("%s%s%s\n", colorize_start(bold), "trafgen "
 135                VERSION_STRING, colorize_end());
 136 }
 137
 138 static void help(void)
 139 {
 140         printf("\n%s %s, zero-copy network packet generator\n",
 141                PROGNAME_STRING, VERSION_STRING);
 142         puts("http://www.netsniff-ng.org\n\n"
 143              "Usage: trafgen [options]\n"
 144              "Options:\n"
 145 /*           "  -o|-d|--out|--dev <netdev|pcap>   Networking Device i.e., eth0 or pcap\n" */
 146              "  -o|-d|--out|--dev <netdev>        Networking Device i.e., eth0\n"
 147              "  -i|-c|--in|--conf <cfg-file>      Packet configuration file\n"
 148              "  -J|--jumbo-support                Support for 64KB Super Jumbo Frames\n"
 149              "                                    Default TX slot: 2048Byte\n"
 150              "  -R|--rfraw                        Inject raw 802.11 frames\n"
 151              "  -n|--num <uint>                   Number of packets until exit\n"
 152              "  `--     0                         Loop until interrupt (default)\n"
 153              "   `-     n                         Send n packets and done\n"
 154              "  -r|--rand                         Randomize packet selection process\n"
 155              "                                    Instead of a round robin selection\n"
 156              "  -t|--gap <uint>                   Interpacket gap in us (approx)\n"
 157              "  -A|--no-sock-mem                  Don't tune core socket memory\n"
 158              "  -S|--ring-size <size>             Manually set ring size to <size>:\n"
 159              "                                    mmap space in KB/MB/GB, e.g. \'10MB\'\n"
 160              "  -k|--kernel-pull <uint>           Kernel pull from user interval in us\n"
 161              "                                    Default is 10us where the TX_RING\n"
 162              "                                    is populated with payload from uspace\n"
 163              "  -b|--bind-cpu <cpu>               Bind to specific CPU (or CPU-range)\n"
 164              "  -B|--unbind-cpu <cpu>             Forbid to use specific CPU (or CPU-range)\n"
 165              "  -H|--prio-high                    Make this high priority process\n"
 166              "  -Q|--notouch-irq                  Do not touch IRQ CPU affinity of NIC\n"
 167              "  -v|--version                      Show version\n"
 168              "  -h|--help                         Guess what?!\n\n"
 169              "Examples:\n"
 170              "  See trafgen.txf for configuration file examples.\n"
 171              "  trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0\n"
 172              "  trafgen --dev wlan0 --rfraw --conf beacon-test.txf --bind-cpu 0 -A\n"
 173              "  trafgen --out eth0 --in trafgen.txf --bind-cpu 0\n"
 174 /*           "  trafgen --out test.pcap --in trafgen.txf --bind-cpu 0\n" */
 175              "  trafgen --dev eth0 --conf trafgen.txf --rand --gap 1000\n"
 176              "  trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0 --num 10 --rand\n\n"
 177              "Note:\n"
 178              "  This tool is targeted for network developers! You should\n"
 179              "  be aware of what you are doing and what these options above\n"
 180              "  mean! Only use this tool in an isolated LAN that you own!\n\n"
 181              "Please report bugs to <bugs@netsniff-ng.org>\n"
 182              "Copyright (C) 2011-2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
 183              "Swiss federal institute of technology (ETH Zurich)\n"
 184              "License: GNU GPL version 2.0\n"
 185              "This is free software: you are free to change and redistribute it.\n"
 186              "There is NO WARRANTY, to the extent permitted by law.\n");
 187         die();
 188 }
 189
 190 static void version(void)
 191 {
 192         printf("\n%s %s, zero-copy network packet generator\n",
 193                PROGNAME_STRING, VERSION_STRING);
 194         puts("http://www.netsniff-ng.org\n\n"
 195              "Please report bugs to <bugs@netsniff-ng.org>\n"
 196              "Copyright (C) 2011-2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
 197              "Swiss federal institute of technology (ETH Zurich)\n"
 198              "License: GNU GPL version 2.0\n"
 199              "This is free software: you are free to change and redistribute it.\n"
 200              "There is NO WARRANTY, to the extent permitted by law.\n");
 201         die();
 202 }
 203
 204 static inline void apply_counter(int i)
 205 {
 206         int j;
 207
 208         for (j = 0; j < packet_dyns[i].counter_len; ++j) {
 209                 uint8_t val;
 210                 struct counter *counter = &packet_dyns[i].counter[j];
 211
 212                 val = counter->val;
 213                 val -= counter->min;
 214
 215                 if (counter->type == TYPE_INC)
 216                         val = (val + counter->inc) %
 217                               (counter->max - counter->min + 1);
 218                 else
 219                         val = (val - counter->inc) %
 220                               (counter->min - counter->max + 1);
 221
 222                 val += counter->min;
 223                 counter->val = val;
 224
 225                 packets[i].payload[counter->off] = val;
 226         }
 227 }
 228
 229 static inline void apply_randomizer(int i)
 230 {
 231         int j;
 232
 233         for (j = 0; j < packet_dyns[i].randomizer_len; ++j) {
 234                 uint8_t val = (uint8_t) mt_rand_int32();
 235                 struct randomizer *randomizer = &packet_dyns[i].randomizer[j];
 236
 237                 randomizer->val = val;
 238                 packets[i].payload[randomizer->off] = val;
 239         }
 240 }
 241
 242 static void tx_precheck(struct mode *mode)
 243 {
 244         int i, mtu;
 245
 246         if (!mode)
 247                 panic("Panic over invalid args for TX trigger!\n");
 248         if (packets_len == 0 || packets_len != packet_dyn_len)
 249                 panic("Panic over invalid args for TX trigger!\n");
 250         if (!mode->rfraw && !device_up_and_running(mode->device))
 251                 panic("Device not up and running!\n");
 252
 253         mtu = device_mtu(mode->device);
 254
 255         for (i = 0; i < packets_len; ++i) {
 256                 if (packets[i].len > mtu + 14)
 257                         panic("Device MTU < than your packet size!\n");
 258                 if (packets[i].len <= 14)
 259                         panic("Device packet size too short!\n");
 260         }
 261 }
 262
 263 static void tx_slowpath_or_die(struct mode *mode)
 264 {
 265         int ifindex, ret;
 266         unsigned int i;
 267         struct sockaddr_ll s_addr;
 268         unsigned long num = 1;
 269         struct timeval start, end, diff;
 270
 271         tx_precheck(mode);
 272
 273         sock = pf_socket();
 274
 275         if (mode->rfraw) {
 276                 mode->device_trans = xstrdup(mode->device);
 277                 xfree(mode->device);
 278
 279                 enter_rfmon_mac80211(mode->device_trans, &mode->device);
 280         }
 281
 282         ifindex = device_ifindex(mode->device);
 283
 284         if (mode->num > 0)
 285                 num = mode->num;
 286         if (mode->rand)
 287                 printf("Note: randomizes output makes trafgen slower!\n");
 288
 289         printf("MD: TX slowpath %s %luus", mode->rand ? "RND" : "RR", mode->gap);
 290         if (mode->rfraw)
 291                 printf(" 802.11 raw via %s", mode->device);
 292         printf("\n\n");
 293         printf("Running! Hang up with ^C!\n\n");
 294
 295         fmemset(&s_addr, 0, sizeof(s_addr));
 296         s_addr.sll_family = PF_PACKET;
 297         s_addr.sll_halen = ETH_ALEN;
 298         s_addr.sll_ifindex = ifindex;
 299
 300         i = 0;
 301
 302         gettimeofday(&start, NULL);
 303
 304         while (likely(sigint == 0) && likely(num > 0)) {
 305                 apply_counter(i);
 306                 apply_randomizer(i);
 307
 308                 ret = sendto(sock, packets[i].payload, packets[i].len, 0,
 309                              (struct sockaddr *) &s_addr, sizeof(s_addr));
 310                 if (ret < 0)
 311                         whine("sendto error!\n");
 312
 313                 mode->stats.tx_bytes += packets[i].len;
 314                 mode->stats.tx_packets++;
 315
 316                 if (mode->rand) {
 317                         i = mt_rand_int32() % packets_len;
 318                 } else {
 319                         i++;
 320                         atomic_cmp_swp(&i, packets_len, 0);
 321                 }
 322
 323                 if (mode->num > 0)
 324                         num--;
 325
 326                 usleep(mode->gap);
 327         }
 328
 329         gettimeofday(&end, NULL);
 330         diff = tv_subtract(end, start);
 331
 332         if (mode->rfraw)
 333                 leave_rfmon_mac80211(mode->device_trans, mode->device);
 334
 335         close(sock);
 336
 337         fflush(stdout);
 338         printf("\n");
 339         printf("\r%12lu frames outgoing\n", mode->stats.tx_packets);
 340         printf("\r%12lu bytes outgoing\n", mode->stats.tx_bytes);
 341         printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec, diff.tv_usec);
 342 }
 343
 344 static void tx_fastpath_or_die(struct mode *mode)
 345 {
 346         int irq, ifindex;
 347         unsigned int i, size, it = 0;
 348         unsigned long num = 1;
 349         uint8_t *out = NULL;
 350         struct ring tx_ring;
 351         struct frame_map *hdr;
 352         struct timeval start, end, diff;
 353
 354         tx_precheck(mode);
 355
 356         sock = pf_socket();
 357
 358         fmemset(&tx_ring, 0, sizeof(tx_ring));
 359
 360         if (mode->rfraw) {
 361                 mode->device_trans = xstrdup(mode->device);
 362                 xfree(mode->device);
 363
 364                 enter_rfmon_mac80211(mode->device_trans, &mode->device);
 365         }
 366
 367         ifindex = device_ifindex(mode->device);
 368         size = ring_size(mode->device, mode->reserve_size);
 369
 370         set_packet_loss_discard(sock);
 371         setup_tx_ring_layout(sock, &tx_ring, size, mode->jumbo_support);
 372         create_tx_ring(sock, &tx_ring);
 373         mmap_tx_ring(sock, &tx_ring);
 374         alloc_tx_ring_frames(&tx_ring);
 375         bind_tx_ring(sock, &tx_ring, ifindex);
 376
 377         if (mode->cpu >= 0 && ifindex > 0) {
 378                 irq = device_irq_number(mode->device);
 379                 device_bind_irq_to_cpu(mode->cpu, irq);
 380                 printf("IRQ: %s:%d > CPU%d\n", mode->device, irq,
 381                        mode->cpu);
 382         }
 383
 384         if (mode->kpull)
 385                 interval = mode->kpull;
 386         if (mode->num > 0)
 387                 num = mode->num;
 388         if (mode->rand)
 389                 printf("Note: randomizes output makes trafgen slower!\n");
 390
 391         printf("MD: TX fastpath %s %luus", mode->rand ? "RND" : "RR", interval);
 392         if (mode->rfraw)
 393                 printf(" 802.11 raw via %s", mode->device);
 394         printf("\n\n");
 395         printf("Running! Hang up with ^C!\n\n");
 396
 397         itimer.it_interval.tv_sec = 0;
 398         itimer.it_interval.tv_usec = interval;
 399         itimer.it_value.tv_sec = 0;
 400         itimer.it_value.tv_usec = interval;
 401         setitimer(ITIMER_REAL, &itimer, NULL);
 402
 403         i = 0;
 404
 405         gettimeofday(&start, NULL);
 406
 407         while (likely(sigint == 0) && likely(num > 0)) {
 408                 while (user_may_pull_from_tx(tx_ring.frames[it].iov_base) &&
 409                        likely(num > 0)) {
 410                         hdr = tx_ring.frames[it].iov_base;
 411
 412                         /* Kernel assumes: data = ph.raw + po->tp_hdrlen -
 413                          *                        sizeof(struct sockaddr_ll); */
 414                         out = ((uint8_t *) hdr) + TPACKET_HDRLEN -
 415                               sizeof(struct sockaddr_ll);
 416
 417                         hdr->tp_h.tp_snaplen = packets[i].len;
 418                         hdr->tp_h.tp_len = packets[i].len;
 419
 420                         apply_counter(i);
 421                         apply_randomizer(i);
 422
 423                         fmemcpy(out, packets[i].payload, packets[i].len);
 424
 425                         mode->stats.tx_bytes += packets[i].len;
 426                         mode->stats.tx_packets++;
 427
 428                         if (mode->rand) {
 429                                 i = mt_rand_int32() % packets_len;
 430                         } else {
 431                                 i++;
 432                                 atomic_cmp_swp(&i, packets_len, 0);
 433                         }
 434
 435                         kernel_may_pull_from_tx(&hdr->tp_h);
 436                         next_slot_prewr(&it, &tx_ring);
 437
 438                         if (mode->num > 0)
 439                                 num--;
 440                         if (unlikely(sigint == 1))
 441                                 break;
 442                 }
 443         }
 444
 445         gettimeofday(&end, NULL);
 446         diff = tv_subtract(end, start);
 447
 448         destroy_tx_ring(sock, &tx_ring);
 449
 450         if (mode->rfraw)
 451                 leave_rfmon_mac80211(mode->device_trans, mode->device);
 452
 453         close(sock);
 454
 455         fflush(stdout);
 456         printf("\n");
 457         printf("\r%12lu frames outgoing\n", mode->stats.tx_packets);
 458         printf("\r%12lu bytes outgoing\n", mode->stats.tx_bytes);
 459         printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec, diff.tv_usec);
 460 }
 461
 462 static void main_loop(struct mode *mode, char *confname)
 463 {
 464         compile_packets(confname, mode->verbose);
 465
 466         if (mode->gap > 0)
 467                 tx_slowpath_or_die(mode);
 468         else
 469                 tx_fastpath_or_die(mode);
 470
 471         cleanup_packets();
 472 }
 473
 474 int main(int argc, char **argv)
 475 {
 476         int c, opt_index, i, j;
 477         int vals[4] = {0};
 478         char *confname = NULL, *ptr;
 479         bool prio_high = false;
 480         bool setsockmem = true;
 481         struct mode mode;
 482
 483         check_for_root_maybe_die();
 484
 485         fmemset(&mode, 0, sizeof(mode));
 486         mode.cpu = CPU_UNKNOWN;
 487         mode.gap = 0;
 488         mode.num = 0;
 489
 490         while ((c = getopt_long(argc, argv, short_options, long_options,
 491                &opt_index)) != EOF) {
 492                 switch (c) {
 493                 case 'h':
 494                         help();
 495                         break;
 496                 case 'v':
 497                         version();
 498                         break;
 499                 case 'V':
 500                         mode.verbose = 1;
 501                         break;
 502                 case 'd':
 503                 case 'o':
 504                         mode.device = xstrndup(optarg, IFNAMSIZ);
 505                         break;
 506                 case 'r':
 507                         mode.rand = 1;
 508                         break;
 509                 case 'R':
 510                         mode.rfraw = 1;
 511                         break;
 512                 case 'J':
 513                         mode.jumbo_support = 1;
 514                         break;
 515                 case 'c':
 516                 case 'i':
 517                         confname = xstrdup(optarg);
 518                         break;
 519                 case 'k':
 520                         mode.kpull = atol(optarg);
 521                         break;
 522                 case 'n':
 523                         mode.num = atol(optarg);
 524                         break;
 525                 case 't':
 526                         mode.gap = atol(optarg);
 527                         break;
 528                 case 'A':
 529                         setsockmem = false;
 530                         break;
 531                 case 'S':
 532                         ptr = optarg;
 533                         mode.reserve_size = 0;
 534
 535                         for (j = i = strlen(optarg); i > 0; --i) {
 536                                 if (!isdigit(optarg[j - i]))
 537                                         break;
 538                                 ptr++;
 539                         }
 540
 541                         if (!strncmp(ptr, "KB", strlen("KB")))
 542                                 mode.reserve_size = 1 << 10;
 543                         else if (!strncmp(ptr, "MB", strlen("MB")))
 544                                 mode.reserve_size = 1 << 20;
 545                         else if (!strncmp(ptr, "GB", strlen("GB")))
 546                                 mode.reserve_size = 1 << 30;
 547                         else
 548                                 panic("Syntax error in ring size param!\n");
 549                         *ptr = 0;
 550
 551                         mode.reserve_size *= atoi(optarg);
 552                         break;
 553                 case 'b':
 554                         set_cpu_affinity(optarg, 0);
 555                         /* Take the first CPU for rebinding the IRQ */
 556                         if (mode.cpu != CPU_NOTOUCH)
 557                                 mode.cpu = atoi(optarg);
 558                         break;
 559                 case 'B':
 560                         set_cpu_affinity(optarg, 1);
 561                         break;
 562                 case 'H':
 563                         prio_high = true;
 564                         break;
 565                 case 'Q':
 566                         mode.cpu = CPU_NOTOUCH;
 567                         break;
 568                 case '?':
 569                         switch (optopt) {
 570                         case 'd':
 571                         case 'c':
 572                         case 'n':
 573                         case 'S':
 574                         case 'b':
 575                         case 'o':
 576                         case 'i':
 577                         case 'k':
 578                         case 'B':
 579                         case 't':
 580                                 panic("Option -%c requires an argument!\n",
 581                                       optopt);
 582                         default:
 583                                 if (isprint(optopt))
 584                                         whine("Unknown option character "
 585                                               "`0x%X\'!\n", optopt);
 586                                 die();
 587                         }
 588                 default:
 589                         break;
 590                 }
 591         }
 592
 593         if (argc < 5)
 594                 help();
 595         if (mode.device == NULL)
 596                 panic("No networking device given!\n");
 597         if (confname == NULL)
 598                 panic("No configuration file given!\n");
 599         if (device_mtu(mode.device) == 0)
 600                 panic("This is no networking device!\n");
 601         if (!mode.rfraw && device_up_and_running(mode.device) == 0)
 602                 panic("Networking device not running!\n");
 603
 604         register_signal(SIGINT, signal_handler);
 605         register_signal(SIGHUP, signal_handler);
 606         register_signal_f(SIGALRM, timer_elapsed, SA_SIGINFO);
 607
 608         header();
 609
 610         if (prio_high == true) {
 611                 set_proc_prio(get_default_proc_prio());
 612                 set_sched_status(get_default_sched_policy(),
 613                                  get_default_sched_prio());
 614         }
 615
 616         if (setsockmem == true) {
 617                 if ((vals[0] = get_system_socket_mem(sock_rmem_max)) < SMEM_SUG_MAX)
 618                         set_system_socket_mem(sock_rmem_max, SMEM_SUG_MAX);
 619                 if ((vals[1] = get_system_socket_mem(sock_rmem_def)) < SMEM_SUG_DEF)
 620                         set_system_socket_mem(sock_rmem_def, SMEM_SUG_DEF);
 621                 if ((vals[2] = get_system_socket_mem(sock_wmem_max)) < SMEM_SUG_MAX)
 622                         set_system_socket_mem(sock_wmem_max, SMEM_SUG_MAX);
 623                 if ((vals[3] = get_system_socket_mem(sock_wmem_def)) < SMEM_SUG_DEF)
 624                         set_system_socket_mem(sock_wmem_def, SMEM_SUG_DEF);
 625         }
 626
 627         main_loop(&mode, confname);
 628
 629         if (setsockmem == true) {
 630                 set_system_socket_mem(sock_rmem_max, vals[0]);
 631                 set_system_socket_mem(sock_rmem_def, vals[1]);
 632                 set_system_socket_mem(sock_wmem_max, vals[2]);
 633                 set_system_socket_mem(sock_wmem_def, vals[3]);
 634         }
 635
 636         free(mode.device);
 637         free(mode.device_trans);
 638         free(confname);
 639
 640         return 0;
 641 }