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 /*
  25
  26 =head1 NAME
  27
  28 trafgen - a high-performance zero-copy network packet generator
  29
  30 =head1 SYNOPSIS
  31
  32 trafgen [-d|--dev <netdev>][-c|--conf <file>][-J|--jumbo-support]
  33         [-x|--interactive][-n|--num <uint>][-r|--rand][-t|--gap <usec>]
  34         [-S|--ring-size <size>][-k|--kernel-pull <usec>][-b|--bind-cpu <cpu>]
  35         [-B|--unbind-cpu <cpu>][-H|--prio-high][-Q|--notouch-irq][-v|--version]
  36         [-h|--help]
  37
  38 =head1 DESCRIPTION
  39
  40 A high-performance network traffic generator that uses the zero-copy TX_RING
  41 for network I/O. For instance, on comodity Gigabit hardware up to 1,488,095 pps
  42 64 Byte pps have been achieved with trafgen.
  43
  44 =head1 OPTIONS
  45
  46 =over
  47
  48 =item trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0
  49
  50 Use packet configuration trafgen.txf, eth0 as transmission device and CPU0
  51 for binding the process.
  52
  53 =back
  54
  55 =head1 OPTIONS
  56
  57 =over
  58
  59 =item -h|--help
  60
  61 Print help text and lists all options.
  62
  63 =item -v|--version
  64
  65 Print version.
  66
  67 =item -d|--dev <netdev>
  68
  69 Device for transmission i.e., eth0.
  70
  71 =item -c|--conf <conf>
  72
  73 Path to packet configuration file.
  74
  75 =item -x|--interactive
  76
  77 Start trafgen in interactive mode.
  78
  79 =item -J|--jumbo-support
  80
  81 Support for 64KB Super Jumbo Frames
  82
  83 =item -n|--num <uint>
  84
  85 Number of packets to generate before exiting.
  86 0 means forever until SIGINT.
  87
  88 =item -r|--rand
  89
  90 Randomize packet selection process instead of round-robin.
  91
  92 =item -t|--gap <uint>
  93
  94 Interpacket gap in microseconds.
  95
  96 =item -S|--ring-size <size>
  97
  98 Manually set ring size to <size>: mmap space in KB/MB/GB.
  99
 100 =item -k|--kernel-pull <uint>
 101
 102 Kernel pull from user interval in microseconds.
 103 Default value is 10 microseconds.
 104
 105 =item -b|--bind-cpu <cpu>
 106
 107 Bind to specific CPU (or CPU-range).
 108
 109 =item -B|--unbind-cpu <cpu>
 110
 111 Forbid to use specific CPU (or CPU-range).
 112
 113 =item -H|--prio-high
 114
 115 Make this high priority process.
 116
 117 =item -Q|--notouch-irq
 118
 119 Do not touch IRQ CPU affinity of NIC.
 120
 121 =back
 122
 123 =head1 EXAMPLES
 124
 125 =over
 126
 127 =item Generate traffic defined in trafgen.txf on eth0 using CPU 0
 128
 129 trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0
 130
 131 =item Generate traffic on eth0 using CPU 0, wait 100 us between packets
 132
 133 trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0 --gap 100
 134
 135 =item Generate 100,000 packet on eth0 using CPU 0
 136
 137 trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0 --num 100000
 138
 139 =back
 140
 141 =head1 AUTHOR
 142
 143 Written by Daniel Borkmann <daniel@netsniff-ng.org>
 144
 145 =head1 DOCUMENTATION
 146
 147 Documentation by Emmanuel Roullit <emmanuel@netsniff-ng.org>
 148
 149 =head1 BUGS
 150
 151 Please report bugs to <bugs@netsniff-ng.org>
 152
 153 =cut
 154
 155 */
 156
 157 #include <stdio.h>
 158 #include <string.h>
 159 #include <getopt.h>
 160 #include <ctype.h>
 161 #include <stdbool.h>
 162 #include <sys/socket.h>
 163 #include <sys/types.h>
 164 #include <sys/stat.h>
 165 #include <sys/time.h>
 166 #include <signal.h>
 167 #include <stdint.h>
 168 #include <stdlib.h>
 169 #include <fcntl.h>
 170 #include <time.h>
 171 #include <net/ethernet.h>
 172
 173 #include "xmalloc.h"
 174 #include "xstring.h"
 175 #include "die.h"
 176 #include "mac80211.h"
 177 #include "xsys.h"
 178 #include "xio.h"
 179 #include "trafgen_conf.h"
 180 #include "tprintf.h"
 181 #include "mtrand.h"
 182 #include "ring_tx.h"
 183
 184 struct stats {
 185         unsigned long tx_bytes;
 186         unsigned long tx_packets;
 187 };
 188
 189 struct mode {
 190 #define CPU_UNKNOWN  -1
 191 #define CPU_NOTOUCH  -2
 192         struct stats stats;
 193         char *device;
 194         char *device_trans;
 195         int cpu;
 196         int rand;
 197         int rfraw;
 198         unsigned long kpull;
 199         /* 0 for automatic, > 0 for manual */
 200         unsigned int reserve_size;
 201         int jumbo_support;
 202         int verbose;
 203         unsigned long num;
 204         unsigned long gap;
 205 };
 206
 207 static int sock;
 208 static struct itimerval itimer;
 209 static unsigned long interval = TX_KERNEL_PULL_INT;
 210
 211 __export sig_atomic_t sigint = 0;
 212
 213 __export struct packet *packets = NULL;
 214 __export unsigned int packets_len = 0;
 215 __export struct packet_dynamics *packet_dyns = NULL;
 216 __export unsigned int packet_dyn_len = 0;
 217
 218 static const char *short_options = "d:c:n:t:vJhS:HQb:B:rk:xi:o:VR";
 219
 220 static struct option long_options[] = {
 221         {"dev", required_argument, 0, 'd'},
 222         {"out", required_argument, 0, 'o'},
 223         {"in", required_argument, 0, 'i'},
 224         {"conf", required_argument, 0, 'c'},
 225         {"num", required_argument, 0, 'n'},
 226         {"gap", required_argument, 0, 't'},
 227         {"ring-size", required_argument, 0, 'S'},
 228         {"bind-cpu", required_argument, 0, 'b'},
 229         {"unbind-cpu", required_argument, 0, 'B'},
 230         {"kernel-pull", required_argument, 0, 'k'},
 231         {"jumbo-support", no_argument, 0, 'J'},
 232         {"rfraw", no_argument, 0, 'R'},
 233         {"interactive", no_argument, 0, 'x'},
 234         {"rand", no_argument, 0, 'r'},
 235         {"prio-high", no_argument, 0, 'H'},
 236         {"notouch-irq", no_argument, 0, 'Q'},
 237         {"verbose", no_argument, 0, 'V'},
 238         {"version", no_argument, 0, 'v'},
 239         {"help", no_argument, 0, 'h'},
 240         {0, 0, 0, 0}
 241 };
 242
 243 static void signal_handler(int number)
 244 {
 245         switch (number) {
 246         case SIGINT:
 247                 sigint = 1;
 248                 break;
 249         case SIGHUP:
 250         default:
 251                 break;
 252         }
 253 }
 254
 255 static void timer_elapsed(int number)
 256 {
 257         itimer.it_interval.tv_sec = 0;
 258         itimer.it_interval.tv_usec = interval;
 259         itimer.it_value.tv_sec = 0;
 260         itimer.it_value.tv_usec = interval;
 261
 262         pull_and_flush_tx_ring(sock);
 263         setitimer(ITIMER_REAL, &itimer, NULL);
 264 }
 265
 266 static void header(void)
 267 {
 268         printf("%s%s%s\n", colorize_start(bold), "trafgen "
 269                VERSION_STRING, colorize_end());
 270 }
 271
 272 static void help(void)
 273 {
 274         printf("\ntrafgen %s, high-perf zero-copy network packet generator\n",
 275                VERSION_STRING);
 276         printf("http://www.netsniff-ng.org\n\n");
 277         printf("Usage: trafgen [options]\n");
 278         printf("Options:\n");
 279         printf("  -o|-d|--out|--dev <netdev|pcap>   Networking Device i.e., eth0 or pcap\n");
 280         printf("  -i|-c|--in|--conf <cfg-file>      Packet configuration file\n");
 281         printf("  -x|--interactive                  Start trafgen in interactive server mode\n");
 282         printf("  -J|--jumbo-support                Support for 64KB Super Jumbo Frames\n");
 283         printf("                                    Default TX slot: 2048Byte\n");
 284         printf("  -R|--rfraw                        Inject raw 802.11 frames\n");
 285         printf("  -n|--num <uint>                   Number of packets until exit\n");
 286         printf("  `--     0                         Loop until interrupt (default)\n");
 287         printf("   `-     n                         Send n packets and done\n");
 288         printf("  -r|--rand                         Randomize packet selection process\n");
 289         printf("                                    Instead of a round robin selection\n");
 290         printf("  -t|--gap <uint>                   Interpacket gap in us (approx)\n");
 291         printf("  -S|--ring-size <size>             Manually set ring size to <size>:\n");
 292         printf("                                    mmap space in KB/MB/GB, e.g. \'10MB\'\n");
 293         printf("  -k|--kernel-pull <uint>           Kernel pull from user interval in us\n");
 294         printf("                                    Default is 10us where the TX_RING\n");
 295         printf("                                    is populated with payload from uspace\n");
 296         printf("  -b|--bind-cpu <cpu>               Bind to specific CPU (or CPU-range)\n");
 297         printf("  -B|--unbind-cpu <cpu>             Forbid to use specific CPU (or CPU-range)\n");
 298         printf("  -H|--prio-high                    Make this high priority process\n");
 299         printf("  -Q|--notouch-irq                  Do not touch IRQ CPU affinity of NIC\n");
 300         printf("  -v|--version                      Show version\n");
 301         printf("  -h|--help                         Guess what?!\n");
 302         printf("\n");
 303         printf("Examples:\n");
 304         printf("  See trafgen.txf for configuration file examples.\n");
 305         printf("  trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0\n");
 306         printf("  trafgen --dev wlan0 --rfraw --conf beacon-test.txf --bind-cpu 0\n");
 307         printf("  trafgen --out eth0 --in trafgen.txf --bind-cpu 0\n");
 308         printf("  trafgen --out test.pcap --in trafgen.txf --bind-cpu 0\n");
 309         printf("  trafgen --dev eth0 --conf trafgen.txf --rand --gap 1000\n");
 310         printf("  trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0 --num 10 --rand\n");
 311         printf("  trafgen --interactive\n");
 312         printf("  trafgen --interactive --dev mgmt0    (only start server on mgmt0)\n");
 313         printf("  trafgen --interactive --conf trafgen-cli.batch\n");
 314         printf("\n");
 315         printf("Note:\n");
 316         printf("  This tool is targeted for network developers! You should\n");
 317         printf("  be aware of what you are doing and what these options above\n");
 318         printf("  mean! Only use this tool in an isolated LAN that you own!\n");
 319         printf("\n");
 320         printf("Please report bugs to <bugs@netsniff-ng.org>\n");
 321         printf("Copyright (C) 2011-2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n");
 322         printf("Swiss federal institute of technology (ETH Zurich)\n");
 323         printf("License: GNU GPL version 2\n");
 324         printf("This is free software: you are free to change and redistribute it.\n");
 325         printf("There is NO WARRANTY, to the extent permitted by law.\n\n");
 326         die();
 327 }
 328
 329 static void version(void)
 330 {
 331         printf("\ntrafgen %s, high-perf zero-copy network packet generator\n",
 332                VERSION_STRING);
 333         printf("http://www.netsniff-ng.org\n\n");
 334         printf("Please report bugs to <bugs@netsniff-ng.org>\n");
 335         printf("Copyright (C) 2011-2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n");
 336         printf("Swiss federal institute of technology (ETH Zurich)\n");
 337         printf("License: GNU GPL version 2\n");
 338         printf("This is free software: you are free to change and redistribute it.\n");
 339         printf("There is NO WARRANTY, to the extent permitted by law.\n\n");
 340         die();
 341 }
 342
 343 static inline void apply_counter(int i)
 344 {
 345         int j;
 346
 347         for (j = 0; j < packet_dyns[i].counter_len; ++j) {
 348                 uint8_t val;
 349                 struct counter *counter = &packet_dyns[i].counter[j];
 350
 351                 val = counter->val;
 352                 val -= counter->min;
 353
 354                 if (counter->type == TYPE_INC)
 355                         val = (val + counter->inc) %
 356                               (counter->max - counter->min + 1);
 357                 else
 358                         val = (val - counter->inc) %
 359                               (counter->min - counter->max + 1);
 360
 361                 val += counter->min;
 362                 counter->val = val;
 363
 364                 packets[i].payload[counter->off] = val;
 365         }
 366 }
 367
 368 static inline void apply_randomizer(int i)
 369 {
 370         int j;
 371
 372         for (j = 0; j < packet_dyns[i].randomizer_len; ++j) {
 373                 uint8_t val = (uint8_t) mt_rand_int32();
 374                 struct randomizer *randomizer = &packet_dyns[i].randomizer[j];
 375
 376                 randomizer->val = val;
 377                 packets[i].payload[randomizer->off] = val;
 378         }
 379 }
 380
 381 static void tx_precheck(struct mode *mode)
 382 {
 383         int i, mtu;
 384
 385         if (!mode)
 386                 panic("Panic over invalid args for TX trigger!\n");
 387         if (packets_len == 0 || packets_len != packet_dyn_len)
 388                 panic("Panic over invalid args for TX trigger!\n");
 389         if (!device_up_and_running(mode->device))
 390                 panic("Device not up and running!\n");
 391
 392         mtu = device_mtu(mode->device);
 393
 394         for (i = 0; i < packets_len; ++i) {
 395                 if (packets[i].len > mtu + 14)
 396                         panic("Device MTU < than your packet size!\n");
 397                 if (packets[i].len <= 14)
 398                         panic("Device packet size too short!\n");
 399         }
 400 }
 401
 402 static void tx_slowpath_or_die(struct mode *mode)
 403 {
 404         int ifindex, ret;
 405         unsigned int i;
 406         struct sockaddr_ll s_addr;
 407         unsigned long num = 1;
 408
 409         tx_precheck(mode);
 410
 411         sock = pf_socket();
 412
 413         if (mode->rfraw) {
 414                 mode->device_trans = xstrdup(mode->device);
 415                 xfree(mode->device);
 416
 417                 enter_rfmon_mac80211(mode->device_trans, &mode->device);
 418         }
 419
 420         ifindex = device_ifindex(mode->device);
 421
 422         if (mode->num > 0)
 423                 num = mode->num;
 424         if (mode->rand)
 425                 printf("Note: randomizes output makes trafgen slower!\n");
 426
 427         printf("MD: TX slowpath %s %luus", mode->rand ? "RND" : "RR", mode->gap);
 428         if (mode->rfraw)
 429                 printf(" 802.11 raw via %s", mode->device);
 430         printf("\n\n");
 431         printf("Running! Hang up with ^C!\n\n");
 432
 433         fmemset(&s_addr, 0, sizeof(s_addr));
 434         s_addr.sll_family = PF_PACKET;
 435         s_addr.sll_halen = ETH_ALEN;
 436         s_addr.sll_ifindex = ifindex;
 437
 438         i = 0;
 439
 440         while (likely(sigint == 0) && likely(num > 0)) {
 441                 apply_counter(i);
 442                 apply_randomizer(i);
 443
 444                 ret = sendto(sock, packets[i].payload, packets[i].len, 0,
 445                              (struct sockaddr *) &s_addr, sizeof(s_addr));
 446                 if (ret < 0)
 447                         whine("sendto error!\n");
 448
 449                 mode->stats.tx_bytes += packets[i].len;
 450                 mode->stats.tx_packets++;
 451
 452                 if (mode->rand) {
 453                         i = mt_rand_int32() % packets_len;
 454                 } else {
 455                         i++;
 456                         atomic_cmp_swp(&i, packets_len, 0);
 457                 }
 458
 459                 if (mode->num > 0)
 460                         num--;
 461
 462                 usleep(mode->gap);
 463         }
 464
 465         if (mode->rfraw)
 466                 leave_rfmon_mac80211(mode->device_trans, mode->device);
 467
 468         close(sock);
 469
 470         fflush(stdout);
 471         printf("\n");
 472         printf("\r%12lu frames outgoing\n", mode->stats.tx_packets);
 473         printf("\r%12lu bytes outgoing\n", mode->stats.tx_bytes);
 474 }
 475
 476 static void tx_fastpath_or_die(struct mode *mode)
 477 {
 478         int irq, ifindex;
 479         unsigned int i, size, it = 0;
 480         unsigned long num = 1;
 481         uint8_t *out = NULL;
 482         struct ring tx_ring;
 483         struct frame_map *hdr;
 484
 485         tx_precheck(mode);
 486
 487         sock = pf_socket();
 488
 489         fmemset(&tx_ring, 0, sizeof(tx_ring));
 490
 491         if (mode->rfraw) {
 492                 mode->device_trans = xstrdup(mode->device);
 493                 xfree(mode->device);
 494
 495                 enter_rfmon_mac80211(mode->device_trans, &mode->device);
 496         }
 497
 498         ifindex = device_ifindex(mode->device);
 499         size = ring_size(mode->device, mode->reserve_size);
 500
 501         set_packet_loss_discard(sock);
 502         setup_tx_ring_layout(sock, &tx_ring, size, mode->jumbo_support);
 503         create_tx_ring(sock, &tx_ring);
 504         mmap_tx_ring(sock, &tx_ring);
 505         alloc_tx_ring_frames(&tx_ring);
 506         bind_tx_ring(sock, &tx_ring, ifindex);
 507
 508         if (mode->cpu >= 0 && ifindex > 0) {
 509                 irq = device_irq_number(mode->device);
 510                 device_bind_irq_to_cpu(mode->cpu, irq);
 511                 printf("IRQ: %s:%d > CPU%d\n", mode->device, irq,
 512                        mode->cpu);
 513         }
 514
 515         if (mode->kpull)
 516                 interval = mode->kpull;
 517         if (mode->num > 0)
 518                 num = mode->num;
 519         if (mode->rand)
 520                 printf("Note: randomizes output makes trafgen slower!\n");
 521
 522         printf("MD: TX fastpath %s %luus", mode->rand ? "RND" : "RR", interval);
 523         if (mode->rfraw)
 524                 printf(" 802.11 raw via %s", mode->device);
 525         printf("\n\n");
 526         printf("Running! Hang up with ^C!\n\n");
 527
 528         itimer.it_interval.tv_sec = 0;
 529         itimer.it_interval.tv_usec = interval;
 530         itimer.it_value.tv_sec = 0;
 531         itimer.it_value.tv_usec = interval;
 532         setitimer(ITIMER_REAL, &itimer, NULL);
 533
 534         i = 0;
 535
 536         while (likely(sigint == 0) && likely(num > 0)) {
 537                 while (user_may_pull_from_tx(tx_ring.frames[it].iov_base) &&
 538                        likely(num > 0)) {
 539                         hdr = tx_ring.frames[it].iov_base;
 540
 541                         /* Kernel assumes: data = ph.raw + po->tp_hdrlen -
 542                          *                        sizeof(struct sockaddr_ll); */
 543                         out = ((uint8_t *) hdr) + TPACKET_HDRLEN -
 544                               sizeof(struct sockaddr_ll);
 545
 546                         hdr->tp_h.tp_snaplen = packets[i].len;
 547                         hdr->tp_h.tp_len = packets[i].len;
 548
 549                         apply_counter(i);
 550                         apply_randomizer(i);
 551
 552                         fmemcpy(out, packets[i].payload, packets[i].len);
 553
 554                         mode->stats.tx_bytes += packets[i].len;
 555                         mode->stats.tx_packets++;
 556
 557                         if (mode->rand) {
 558                                 i = mt_rand_int32() % packets_len;
 559                         } else {
 560                                 i++;
 561                                 atomic_cmp_swp(&i, packets_len, 0);
 562                         }
 563
 564                         kernel_may_pull_from_tx(&hdr->tp_h);
 565                         next_slot_prewr(&it, &tx_ring);
 566
 567                         if (mode->num > 0)
 568                                 num--;
 569                         if (unlikely(sigint == 1))
 570                                 break;
 571                 }
 572         }
 573
 574         destroy_tx_ring(sock, &tx_ring);
 575
 576         if (mode->rfraw)
 577                 leave_rfmon_mac80211(mode->device_trans, mode->device);
 578
 579         close(sock);
 580
 581         fflush(stdout);
 582         printf("\n");
 583         printf("\r%12lu frames outgoing\n", mode->stats.tx_packets);
 584         printf("\r%12lu bytes outgoing\n", mode->stats.tx_bytes);
 585 }
 586
 587 static void main_loop(struct mode *mode, char *confname)
 588 {
 589         compile_packets(confname, mode->verbose);
 590
 591         if (mode->gap > 0)
 592                 tx_slowpath_or_die(mode);
 593         else
 594                 tx_fastpath_or_die(mode);
 595
 596         cleanup_packets();
 597 }
 598
 599 int main(int argc, char **argv)
 600 {
 601         int c, opt_index, i, j, interactive = 0;
 602         char *confname = NULL, *ptr;
 603         bool prio_high = false;
 604         struct mode mode;
 605
 606         check_for_root_maybe_die();
 607
 608         fmemset(&mode, 0, sizeof(mode));
 609         mode.cpu = CPU_UNKNOWN;
 610         mode.gap = 0;
 611         mode.num = 0;
 612
 613         while ((c = getopt_long(argc, argv, short_options, long_options,
 614                &opt_index)) != EOF) {
 615                 switch (c) {
 616                 case 'h':
 617                         help();
 618                         break;
 619                 case 'v':
 620                         version();
 621                         break;
 622                 case 'V':
 623                         mode.verbose = 1;
 624                         break;
 625                 case 'd':
 626                 case 'o':
 627                         mode.device = xstrndup(optarg, IFNAMSIZ);
 628                         break;
 629                 case 'x':
 630                         interactive = 1;
 631                         break;
 632                 case 'r':
 633                         mode.rand = 1;
 634                         break;
 635                 case 'R':
 636                         mode.rfraw = 1;
 637                         break;
 638                 case 'J':
 639                         mode.jumbo_support = 1;
 640                         break;
 641                 case 'c':
 642                 case 'i':
 643                         confname = xstrdup(optarg);
 644                         break;
 645                 case 'k':
 646                         mode.kpull = atol(optarg);
 647                         break;
 648                 case 'n':
 649                         mode.num = atol(optarg);
 650                         break;
 651                 case 't':
 652                         mode.gap = atol(optarg);
 653                         break;
 654                 case 'S':
 655                         ptr = optarg;
 656                         mode.reserve_size = 0;
 657
 658                         for (j = i = strlen(optarg); i > 0; --i) {
 659                                 if (!isdigit(optarg[j - i]))
 660                                         break;
 661                                 ptr++;
 662                         }
 663
 664                         if (!strncmp(ptr, "KB", strlen("KB")))
 665                                 mode.reserve_size = 1 << 10;
 666                         else if (!strncmp(ptr, "MB", strlen("MB")))
 667                                 mode.reserve_size = 1 << 20;
 668                         else if (!strncmp(ptr, "GB", strlen("GB")))
 669                                 mode.reserve_size = 1 << 30;
 670                         else
 671                                 panic("Syntax error in ring size param!\n");
 672                         *ptr = 0;
 673
 674                         mode.reserve_size *= atoi(optarg);
 675                         break;
 676                 case 'b':
 677                         set_cpu_affinity(optarg, 0);
 678                         /* Take the first CPU for rebinding the IRQ */
 679                         if (mode.cpu != CPU_NOTOUCH)
 680                                 mode.cpu = atoi(optarg);
 681                         break;
 682                 case 'B':
 683                         set_cpu_affinity(optarg, 1);
 684                         break;
 685                 case 'H':
 686                         prio_high = true;
 687                         break;
 688                 case 'Q':
 689                         mode.cpu = CPU_NOTOUCH;
 690                         break;
 691                 case '?':
 692                         switch (optopt) {
 693                         case 'd':
 694                         case 'c':
 695                         case 'n':
 696                         case 'S':
 697                         case 'b':
 698                         case 'o':
 699                         case 'i':
 700                         case 'k':
 701                         case 'B':
 702                         case 't':
 703                                 panic("Option -%c requires an argument!\n",
 704                                       optopt);
 705                         default:
 706                                 if (isprint(optopt))
 707                                         whine("Unknown option character "
 708                                               "`0x%X\'!\n", optopt);
 709                                 die();
 710                         }
 711                 default:
 712                         break;
 713                 }
 714         }
 715
 716         if (!interactive && argc < 5)
 717                 help();
 718         if (interactive && argc < 2)
 719                 help();
 720         if (!interactive && mode.device == NULL)
 721                 panic("No networking device given!\n");
 722         if (!interactive && confname == NULL)
 723                 panic("No configuration file given!\n");
 724         if (!interactive && device_mtu(mode.device) == 0)
 725                 panic("This is no networking device!\n");
 726         if (!interactive && device_up_and_running(mode.device) == 0)
 727                 panic("Networking device not running!\n");
 728
 729         register_signal(SIGINT, signal_handler);
 730         register_signal(SIGHUP, signal_handler);
 731         register_signal_f(SIGALRM, timer_elapsed, SA_SIGINFO);
 732
 733         header();
 734
 735         if (prio_high == true) {
 736                 set_proc_prio(get_default_proc_prio());
 737                 set_sched_status(get_default_sched_policy(),
 738                                  get_default_sched_prio());
 739         }
 740
 741         if (interactive)
 742                 main_loop_interactive(&mode, confname);
 743         else
 744                 main_loop(&mode, confname);
 745
 746         if (mode.device)
 747                 xfree(mode.device);
 748         if (mode.device_trans)
 749                 xfree(mode.device_trans);
 750         if (confname)
 751                 xfree(confname);
 752
 753         return 0;
 754 }