src/init.c

   1 /*
   2  * Mausezahn - A fast versatile traffic generator
   3  * Copyright (C) 2008-2010 Herbert Haas
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License version 2 as published by the
   7  * Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
  12  * details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, see http://www.gnu.org/licenses/gpl-2.0.html
  16  *
  17 */
  18
  19
  20
  21
  22 // ****************************************************************************
  23 // Two features here:
  24 //   1. Initialize globals
  25 //   2. Handle arguments in *argv[] and make a mode decision
  26 // ****************************************************************************
  27
  28 #include "mz.h"
  29 #include "cli.h"
  30 #include "mops.h"
  31
  32 // Purpose: reset globals, global structs, etc.
  33 int reset()
  34 {
  35    int i;
  36    time_t t;
  37
  38    // Determine platform type sizes:
  39    MZ_SIZE_LONG_INT = sizeof(long int);
  40
  41    mz_default_config_path[0] = 0x00;
  42    mz_default_log_path[0] = 0x00;
  43
  44    // Reset globals:
  45    quiet = 0;
  46    verbose = 0;
  47    simulate = 0;
  48    filename[0] = '\0';
  49    path[0] = '\0';
  50    gind=0;
  51    gind_max = TIME_COUNT;
  52    fp = NULL;
  53    fp2 = NULL;
  54    mz_port = 0;
  55    mz_rand = 0;
  56    mp_head = NULL;
  57
  58    for (i=0;i<TIME_COUNT_MAX;i++) jitter[i] = 0;
  59
  60    time0_flag = 0; // If set then time0 has valid data
  61    sqnr0_flag = 0; // If set then sqnr_last and sqnr_next has valid data
  62    rtp_log = 0;
  63    mz_ssrc[0]=0; mz_ssrc[1]=0; mz_ssrc[2]=0; mz_ssrc[3]=0;
  64
  65    // Reset mgmt parameters of TX:
  66    tx.packet_mode = 1;     // assume we don't care about L2
  67    tx.count = 1;
  68    tx.delay = DEFAULT_DELAY;
  69    tx.arg_string[0] = '\0';
  70
  71    // Reset Ethernet parameters of TX:
  72    tx.eth_params_already_set = 0;
  73    for (i=0; i<6; i++)   tx.eth_dst[i] = 0xff;
  74    for (i=0; i<6; i++)   tx.eth_src[i] = 0; // TODO: Get own MAC !!!
  75    tx.eth_dst_txt[0] = '\0';
  76    tx.eth_src_txt[0] = '\0';
  77    tx.eth_dst_rand = 0;
  78    tx.eth_src_rand = 0;
  79
  80    tx.eth_type = 0x800;
  81    tx.eth_len = 0;
  82    tx.eth_payload[0] = '\0';
  83    tx.eth_payload_s = 0;
  84    tx.padding = 0;
  85
  86    // Reset CDP parameters for TX:
  87    tx.cdp_sum  = 0;
  88    tx.cdp_version = 0;
  89    tx.cdp_ttl = 0;
  90    tx.cdp_payload[0] = '\0';
  91    tx.cdp_payload_s = 0;
  92    tx.cdp_tlv_id[0] = '\0';
  93    tx.cdp_tlv_id_len = 0;
  94
  95    // Reset 802.1Q parameters of TX:
  96    tx.dot1Q=0;
  97    tx.dot1Q_txt[0] = '\0';
  98
  99    // ASCII Payload:
 100    tx.ascii = 0;                       // 1 if specified
 101    tx.ascii_payload[0]= '\0';
 102
 103    // HEX Payload:
 104    tx.hex_payload_s = 0;
 105
 106    // Reset MPLS parameters of TX:
 107    tx.mpls = 0;
 108    tx.mpls_txt[0] = '\0';
 109    tx.mpls_label = 0;
 110    tx.mpls_exp = 0;
 111    tx.mpls_bos = 1;
 112    tx.mpls_ttl = 255;
 113    tx.mpls_verbose_string[0] = '\0';
 114
 115    // Reset IP parameters of TX:
 116    tx.ip_src_txt[0] = '\0';
 117    tx.ip_src_rand = 0;
 118    tx.ip_dst_txt[0] = '\0';
 119    tx.ip_src_isrange = 0;
 120    tx.ip_src_start = 0;
 121    tx.ip_src_stop = 0;
 122
 123    tx.ip_dst_start = 0;
 124    tx.ip_dst_stop = 0;
 125    tx.ip_dst_isrange = 0;
 126
 127    tx.ip_len = 0;
 128    tx.ip_payload[0]= '\0';
 129    tx.ip_payload_s = 0;
 130    tx.ip_option[0]= '\0';
 131    tx.ip_option_s = 0;
 132
 133    // Reset ICMP parameters:
 134    tx.icmp_type=0;
 135    tx.icmp_code=0;
 136    tx.icmp_chksum=0;            // 0=autofill
 137    tx.icmp_ident=0x42;
 138    tx.icmp_sqnr=0x1;
 139    tx.icmp_payload_s=0;
 140
 141    // Reset general L4 parameters:
 142    tx.sp = 0;
 143    tx.dp = 0;
 144    tx.sp_start = 0;
 145    tx.sp_stop = 0;
 146    tx.dp_start = 0;
 147    tx.dp_stop = 0;
 148    tx.sp_isrange = 0;
 149    tx.dp_isrange = 0;
 150
 151    // Reset UDP parameters of TX:
 152
 153    tx.udp_len = 0;                    // If set to zero then create_udp_packet will calculate it
 154    tx.udp_sum = 0;
 155    tx.udp_payload[0] = '\0';
 156    tx.udp_payload_s = 0;
 157
 158    // Reset TCP parameters of TX:
 159
 160    tx.tcp_seq = 42;
 161    tx.tcp_seq_stop = 42;
 162    tx.tcp_seq_delta = 0;              // also used as 'isrange' meaning
 163    tx.tcp_ack = 42;
 164    tx.tcp_control = 0;
 165    tx.tcp_win = 10000;
 166    tx.tcp_sum = 0;
 167    tx.tcp_urg = 0;
 168    tx.tcp_len = 20;                   // Least size (TCP header only)
 169    tx.tcp_payload[0] = '\0';
 170    tx.tcp_payload_s = 0;
 171
 172    // Reset RTP parameters of TX:
 173    tx.rtp_sqnr = 0;
 174    tx.rtp_stmp = 0;
 175
 176    // Initialize random generator
 177    time(&t);
 178    srand((unsigned int)t);
 179
 180    // Reset device_list
 181    for (i=0; i<MZ_MAX_DEVICES; i++) {
 182            device_list[i].arprx_thread = 0;
 183            device_list[i].p_arp = NULL;
 184            device_list[i].arp_table = NULL;
 185            device_list[i].ps=-1;
 186            device_list[i].cli=0;
 187            device_list[i].mgmt_only=0;
 188    }
 189
 190    return 0;
 191 }
 192
 193
 194
 195 // Purpose: Properly handle arguments and configure global structs (tx)
 196 int getopts (int argc, char *argv[])
 197 {
 198         int i, c, rargs, RX=0, count_set=0, delay_set=0;
 199         unsigned int time_factor;
 200         char *packet_type=NULL, *mops_type=NULL;
 201         char *dum;
 202         unsigned char *dum1, *dum2;
 203
 204         libnet_t       *l;
 205         char err_buf[LIBNET_ERRBUF_SIZE];
 206         struct libnet_ether_addr *mymac;
 207
 208         FILE *afp;
 209         char hexpld[MAX_PAYLOAD_SIZE*2];
 210         int hexpld_specified=0;
 211
 212         opterr = 1; // let getopt print error message if necessary
 213
 214
 215         while ((c = getopt (argc, argv, "hqvVSxra:A:b:B:c:d:f:F:p:P:t:T:M:Q:X:")) != -1)
 216                 switch (c) {
 217                  case 'h':
 218                         usage();
 219                         break;
 220                  case 'q':
 221                         quiet=1;
 222                         break;
 223                  case 'v':
 224                         verbose=1;
 225                         break;
 226                  case 'V':
 227                         verbose=2;
 228                         break;
 229                  case 'S':
 230                         simulate=1;
 231                         break;
 232                  case 'x':
 233                         mz_port = MZ_DEFAULT_PORT;
 234                         break;
 235                  case 'a':
 236                         strncpy (tx.eth_src_txt, optarg, 32);
 237                         tx.packet_mode = 0;
 238                         break;
 239                  case 'A':
 240                         strncpy (tx.ip_src_txt, optarg, 32);
 241                         break;
 242                  case 'b':
 243                         strncpy (tx.eth_dst_txt, optarg, 32);
 244                         tx.packet_mode = 0;
 245                         break;
 246                  case 'B':
 247                         strncpy (tx.ip_dst_txt, optarg, 32);
 248                         break;
 249                  case 'c':
 250                         errno=0;
 251                         tx.count = strtol(optarg, (char **)NULL, 10);
 252                         if ((errno == ERANGE && (tx.count == LONG_MAX || tx.count == LONG_MIN))
 253                             || (errno != 0 && tx.count == 0)) {
 254                                 perror("strtol");
 255                                 return (-1);
 256                         }
 257                         if (tx.count<0) tx.count=1;       //TODO: Allow count=0 which means infinity (need to update all send_functions)
 258                         count_set=1;
 259                         break;
 260                  case 'd':
 261                         errno=0;
 262                         // determine whether seconds or msecs are used
 263                         // default is usec!!!
 264                         time_factor=1;
 265                         if (exists(optarg,"s") || exists(optarg,"sec")) time_factor=1000000;
 266                         if (exists(optarg,"m") || exists(optarg,"msec")) time_factor=1000;
 267                         dum = strtok(optarg,"ms");
 268                         tx.delay = strtol(dum, (char **)NULL, 10) * time_factor;
 269                         if ((errno == ERANGE && (tx.delay == LONG_MAX || tx.delay == LONG_MIN))
 270                             || (errno != 0 && tx.delay == 0)) {
 271                                 perror("strtol");
 272                                 return (-1);
 273                         }
 274                         if (tx.delay<0) tx.delay=0; // no delay
 275                         delay_set=1;
 276                         break;
 277                  case 'p':
 278                         errno=0;
 279                         tx.padding = strtol(optarg, (char **)NULL, 10);
 280                         if ((errno == ERANGE && (tx.padding == LONG_MAX || tx.padding == LONG_MIN))
 281                             || (errno != 0 && tx.padding == 0))  {
 282                                 perror("strtol");
 283                                 return (-1);
 284                         }
 285                         if (tx.padding>10000) {
 286                                 fprintf(stderr, " Warning: Padding must not exceed 10000!\n");
 287                                 return -1;
 288                         }
 289                         break;
 290                  case 't':
 291                         packet_type = optarg; // analyzed below
 292                         break;
 293                  case 'X':
 294                         mops_type = optarg; // MOPS TRANSITION STRATEGY -- analyzed below
 295                         break;
 296                  case 'T':
 297                         packet_type = optarg;
 298                         RX = 1;
 299                         break;
 300                  case 'r':
 301                         mz_rand = 1;
 302                         break;
 303                  case 'M':
 304                         if (strncmp(optarg,"help",4)==0) {
 305                                 (void) get_mpls_params("help ");
 306                         }
 307                         else {
 308                                 strncpy (tx.mpls_txt, optarg, 128);
 309                                 tx.eth_type = ETHERTYPE_MPLS;
 310                                 tx.packet_mode = 0;
 311                                 tx.mpls=1;
 312                         }
 313                         break;
 314                  case 'P':  // ASCII payload
 315                         strncpy((char*)tx.ascii_payload,  optarg, MAX_PAYLOAD_SIZE);
 316                         tx.ascii = 1;
 317                         break;
 318                  case 'f': // ASCII payload in FILE
 319                         afp = fopen(optarg, "r");
 320                         if (fgets((char*)tx.ascii_payload, MAX_PAYLOAD_SIZE, afp) == NULL)
 321                                 fprintf(stderr, " mz/getopts: File empty?\n");
 322                         fclose(afp);
 323                         tx.ascii = 1;
 324                         break;
 325                  case 'F': // HEX payload in FILE
 326                         afp = fopen(optarg, "r");
 327                         i=0;
 328                         while ( (hexpld[i]=fgetc(afp))!=EOF ) {
 329                                 if (isspace(hexpld[i])) {
 330                                         hexpld[i]=':';
 331                                 }
 332                                 i++;
 333                         }
 334                         hexpld[i]='\0';
 335                         fclose(afp);
 336                         hexpld_specified=1;
 337                         break;
 338                  case 'Q': // VLAN TAG
 339                         if (strncmp(optarg,"help",4)==0) {
 340                                 print_dot1Q_help(); // ugly but most simple and safe solution
 341                         }
 342                         else {
 343                                 strncpy (tx.dot1Q_txt, optarg, 32);
 344                                 tx.dot1Q=1;
 345                                 // determine number of VLAN tags
 346                                 for (i=0; i<strlen(tx.dot1Q_txt); i++) {
 347                                         if (tx.dot1Q_txt[i]==',') tx.dot1Q++;
 348                                 }
 349                                 tx.packet_mode = 0;
 350                         }
 351                         break;
 352                  case '?':
 353                         if ((optopt == 'a') || (optopt == 'b') || (optopt = 'c') ||
 354                             (optopt == 'd') || (optopt == 'f') || (optopt = 'p') ||
 355                             (optopt == 't') || (optopt == 'm'))
 356                                 fprintf (stderr, " mz/getopts: Option -%c requires an argument.\n", optopt);
 357                         else if (isprint (optopt))
 358                                 fprintf (stderr, " mz/getopts: Unknown option -%c'.\n", optopt);
 359                         else
 360                                 fprintf (stderr, " mz/getopts: Unknown option character \\x%x'.\n", optopt);
 361                         return 1;
 362                  default:
 363                         fprintf (stderr," mz/getopts: Could not handle arguments properly!\n");
 364                         return 1;
 365                 }
 366
 367         // ********************************************
 368         //       Handle additional arguments
 369         // ********************************************
 370         //
 371         // Greeting text
 372         if (verbose) {
 373                 fprintf(stderr,"\n"
 374                         MAUSEZAHN_VERSION
 375                         "\n"
 376                         "Use at your own risk and responsibility!\n"
 377                         "-- Verbose mode --\n"
 378                         "\n");
 379         }
 380
 381         if (argc<2) {
 382                 usage();
 383         }
 384
 385         if ((rargs=argc-optind)>2) {  // number of remaining arguments
 386                 fprintf(stderr," mz/getopts: Too many arguments!\n");
 387                 return -1;
 388         }
 389
 390
 391         // There can be 0-2 additional arguments
 392         switch (rargs) {
 393          case 0:
 394                 if (lookupdev()) { // no device found
 395                         if (verbose) fprintf(stderr, " mz: no active interfaces found!\n");
 396                         strcpy(tx.device, "lo");
 397                 }
 398                 if (verbose) // device found
 399                         fprintf(stderr," mz: device not given, will use %s\n",tx.device);
 400                 break;
 401          case 1: // arg_string OR device given => find out!
 402                 if ( (strncmp(argv[optind],"eth",3)==0)
 403                      || (strncmp(argv[optind],"ath",3)==0)
 404                      || ((strncmp(argv[optind],"lo",2)==0)&&(strncmp(argv[optind],"log",3)!=0))
 405                      || (strncmp(argv[optind],"vmnet",5)==0)
 406                      || (strncmp(argv[optind],"wifi",4)==0) ) {
 407                         // device has been specified!
 408                         strncpy (tx.device, argv[optind], 16);
 409                 }
 410                 else { /// arg_string given => no device has been specified -- let's find one!
 411                         strncpy (tx.arg_string, argv[optind], MAX_PAYLOAD_SIZE);
 412                         if (lookupdev()) { // no device found
 413                                 if (verbose) fprintf(stderr, " mz: no active interfaces found!\n");
 414                                 strcpy(tx.device, "lo");
 415                         }
 416                         if (verbose)
 417                                 fprintf(stderr," mz: device not given, will use %s\n",tx.device);
 418                 }
 419                 break;
 420          case 2: // both device and arg_string given
 421                 strncpy (tx.device, argv[optind], 16);
 422                 strncpy (tx.arg_string, argv[optind+1], MAX_PAYLOAD_SIZE);
 423                 break;
 424          default:
 425                 fprintf(stderr," mz/getopts: Unknown argument problem!\n");
 426                 return 1;
 427         }
 428
 429         if (hexpld_specified) {
 430                 strcat(tx.arg_string, ",p=");
 431                 strcat(tx.arg_string, hexpld);
 432         }
 433
 434
 435         //////////////////////////////////////////////////////////////////////////
 436         //
 437         // Initialize MAC and IP Addresses.
 438         //
 439         // - tx.eth_src = own interface MAC
 440         // - tx.ip_src  = own interface IP or user specified
 441         // - tx.ip_dst  = 255.255.255.255 or user specified (can be a range)
 442         // - tx.ip_src_rand ... is set if needed.
 443         //
 444
 445         // Get own device MAC address:
 446         // Don't open context if only a help text is requested
 447         if  (getarg(tx.arg_string,"help", NULL)!=1) {
 448                 l = libnet_init (LIBNET_LINK_ADV, tx.device, err_buf );
 449                 if (l == NULL) {
 450                         fprintf(stderr, " mz/getopts: libnet_init() failed (%s)", err_buf);
 451                         return -1;
 452                 }
 453                 mymac = libnet_get_hwaddr(l);
 454                 for (i=0; i<6; i++) {
 455                         tx.eth_src[i] = mymac->ether_addr_octet[i];
 456                         tx.eth_mac_own[i] = mymac->ether_addr_octet[i];
 457                 }
 458
 459                 // Set source IP address:
 460                 if (strlen(tx.ip_src_txt)) { // option -A has been specified
 461                         if (mz_strcmp(tx.ip_src_txt, "bcast", 2)==0) {
 462                                 tx.ip_src = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
 463                         } else if (strcmp(tx.ip_src_txt, "rand") == 0) {
 464                                 tx.ip_src_rand = 1;
 465                                 tx.ip_src_h  = (u_int32_t) ( ((float) rand()/RAND_MAX)*0xE0000000); //this is 224.0.0.0
 466                         }
 467                         else if (get_ip_range_src(tx.ip_src_txt)) { // returns 1 when no range has been specified
 468                                 // name2addr4 accepts a DOTTED DECIMAL ADDRESS or a FQDN:
 469                                 tx.ip_src = libnet_name2addr4 (l, tx.ip_src_txt, LIBNET_RESOLVE);
 470                         }
 471                 }
 472                 else { // no source IP specified: by default use own IP address
 473                         tx.ip_src = libnet_get_ipaddr4(l);
 474                 }
 475
 476                 // Set destination IP address:
 477                 if (strlen(tx.ip_dst_txt)) {  // option -B has been specified
 478                         if (mz_strcmp(tx.ip_dst_txt, "rand", 2)==0) {
 479                                 fprintf(stderr, "Option -B does not support random destination IP addresses currently.\n");
 480                                 return 1;
 481                         }
 482
 483                         if (mz_strcmp(tx.ip_dst_txt, "bcast", 2)==0) {
 484                                 tx.ip_dst = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
 485                         } else if (get_ip_range_dst(tx.ip_dst_txt)) { // returns 1 when no range has been specified
 486                                 // name2addr4 accepts a DOTTED DECIMAL ADDRESS or a FQDN:
 487                                 tx.ip_dst = libnet_name2addr4 (l, tx.ip_dst_txt, LIBNET_RESOLVE);
 488                         }
 489                 }
 490                 else { // no destination IP specified: by default use broadcast
 491                         tx.ip_dst = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
 492                 }
 493
 494                 // Initialize tx.ip_src_h and tx.ip_dst_h which are used by 'print_frame_details()'
 495                 // in verbose mode. See 'modifications.c'.
 496
 497                 if (tx.ip_src_rand) { // ip_src_h already given, convert to ip_src
 498                         dum1 = (unsigned char*) &tx.ip_src_h;
 499                         dum2 = (unsigned char*) &tx.ip_src;
 500                 }
 501                 else { // ip_src already given, convert to ip_src_h
 502                         dum1 = (unsigned char*) &tx.ip_src;
 503                         dum2 = (unsigned char*) &tx.ip_src_h;
 504                 }
 505
 506                 *dum2 = *(dum1+3);
 507                 dum2++;
 508                 *dum2 = *(dum1+2);
 509                 dum2++;
 510                 *dum2 = *(dum1+1);
 511                 dum2++;
 512                 *dum2 = *dum1;
 513
 514                 dum1 = (unsigned char*) &tx.ip_dst;
 515                 dum2 = (unsigned char*) &tx.ip_dst_h;
 516
 517                 *dum2 = *(dum1+3);
 518                 dum2++;
 519                 *dum2 = *(dum1+2);
 520                 dum2++;
 521                 *dum2 = *(dum1+1);
 522                 dum2++;
 523                 *dum2 = *dum1;
 524
 525                 libnet_destroy(l);
 526         }
 527
 528         //
 529         // END OF ADDRESS INITIALIZATION
 530         //
 531         //////////////////////////////////////////////////////////////////////////
 532
 533
 534         ////// retrieve interface parameters ///////
 535
 536         for (i=0; i<device_list_entries; i++) {
 537                 get_dev_params(device_list[i].dev);
 538         }
 539
 540
 541         //////////////////////////////////////////////////////////////////////////
 542         //
 543         //  Mausezahn CLI desired?
 544         if (mz_port) {
 545                 // has port number been specified?
 546                 if (strlen(tx.arg_string)) {
 547                         mz_port = (int) str2int (tx.arg_string);
 548                 }
 549
 550                 if (!quiet) {
 551                         fprintf(stderr, "Mausezahn accepts incoming Telnet connections on port %i.\n", mz_port);
 552                 }
 553
 554                 mz_cli_init();
 555                 cli();
 556         }
 557
 558         //////////////////////////////////////////////////////////////////////////
 559         //
 560         //                 Mode decision
 561         //
 562         // Consider -t and -m option (used exclusively)
 563         //   -t => special packet types, stateless
 564         //
 565         // If -t not present then evaluate arg_string which must
 566         // contain a byte-string in hexadecimal notation.
 567         //
 568         //
 569
 570         // ***** NEW: MOPS TRANSITION STRATEGY *****
 571         if (mops_type != NULL) {
 572
 573                 if (mz_strcmp(mops_type,"lldp",4)==0) {
 574                         mops_direct(tx.device, MOPS_LLDP, tx.arg_string);
 575                 }
 576         }
 577
 578
 579    if (packet_type == NULL) { // raw hex string given
 580            mode = BYTE_STREAM;
 581    }
 582         else if (strcmp(packet_type,"arp")==0) {
 583                 mode = ARP;
 584         }
 585         else if (strcmp(packet_type,"bpdu")==0) {
 586                 mode = BPDU;
 587         }
 588         else if (strcmp(packet_type,"ip")==0) {
 589                 mode = IP;
 590         }
 591         else if (strcmp(packet_type,"udp")==0) {
 592                 mode = UDP;
 593         }
 594         else if (strcmp(packet_type,"icmp")==0) {
 595                 mode = ICMP;
 596         }
 597         else if (strcmp(packet_type,"tcp")==0) {
 598                 mode = TCP;
 599         }
 600         else if (strcmp(packet_type,"dns")==0) {
 601                 mode = DNS;
 602         }
 603         else if (strcmp(packet_type,"cdp")==0) {
 604                 mode = CDP;
 605         }
 606         else if (strcmp(packet_type,"syslog")==0) {
 607                 mode = SYSLOG;
 608         }
 609         else if (strcmp(packet_type,"lldp")==0) {
 610                 mode = LLDP;
 611                 tx.packet_mode=0; // create whole frame by ourself
 612         }
 613         else if (strcmp(packet_type,"rtp")==0) {
 614                 if (RX) {
 615                         mode = RX_RTP;
 616                 }
 617                 else {
 618                         mode = RTP;
 619                         if (!count_set) tx.count = 0;
 620                         if (!delay_set) tx.delay = 20000; // 20 msec inter-packet delay for RTP
 621                 }
 622         }
 623         else if (strcmp(packet_type,"help")==0) {
 624                 fprintf(stderr, "\n"
 625                         MAUSEZAHN_VERSION
 626                         "\n"
 627                         "|  The following packet types are currently implemented:\n"
 628                         "|\n"
 629                         "|  arp            ... sends ARP packets\n"
 630                         "|  bpdu           ... sends BPDU packets (STP or PVST+)\n"
 631                         "|  cdp            ... sends CDP messages\n"
 632                         "|  ip             ... sends IPv4 packets\n"
 633                         "|  udp            ... sends UDP datagrams\n"
 634                         "|  tcp            ... sends TCP segments\n"
 635                         "|  icmp           ... sends ICMP messages\n"
 636                         "|  dns            ... sends DNS messages\n"
 637                         "|  rtp            ... sends RTP datagrams\n"
 638                         "|  syslog         ... sends Syslog messages\n"
 639                         "|\n"
 640                         "| Of course you can build any other packet type 'manually' using the direct layer 2 mode.\n"
 641                         "| FYI: The interactive mode supports additional protocols. (Try mz -x <port>)\n"
 642                         "\n"
 643                         );
 644                 exit(1);
 645         }
 646         else {
 647                 fprintf(stderr, " mz: you must specify a valid packet type!\n");
 648         }
 649
 650
 651         //////////////////////////////////////////////////////////////////////////
 652
 653         // TODO: Implement macro support
 654         //       Check macro types here
 655
 656         return 0;
 657
 658 }
 659
 660
 661
 662