staging/mausezahn.c

   1 /*
   2  * netsniff-ng - the packet sniffing beast
   3  * Mausezahn, a fast versatile traffic generator
   4  * Copyright 2008, 2009, 2010 Herbert Haas.
   5  * Subject to the GPL, version 2.
   6  */
   7
   8 #define _GNU_SOURCE
   9 #include <libnet.h>
  10 #include <pcap/pcap.h>
  11 #include <stdio.h>
  12 #include <unistd.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15 #include <errno.h>
  16 #include <limits.h>
  17 #include <sys/time.h>
  18 #include <time.h>
  19 #include <signal.h>
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22 #include <arpa/inet.h>
  23 #include <sys/ioctl.h>
  24 #include <netinet/in.h>
  25 #include <stdarg.h>
  26
  27 #include "mz.h"
  28 #include "cli.h"
  29 #include "mops.h"
  30 #include "config.h"
  31 #include "llist.h"
  32 #include "die.h"
  33
  34 int verbose_level = 0;
  35
  36 static const char *short_options = "46hqvVSxra:A:b:B:c:d:E:f:F:l:p:P:t:T:M:Q:X:";
  37
  38 static void signal_handler(int number)
  39 {
  40         clean_up(number);
  41 }
  42
  43 void  clean_up(int sig)
  44 {
  45         int i;
  46         struct arp_table_struct *cur, *next;
  47
  48         if (!quiet) fprintf(stderr, "\nMausezahn cleans up...\n");
  49
  50         if (fp != NULL) {
  51                 verbose_l1(" close files (1) ...\n");
  52
  53                 fflush(fp);
  54                 fclose(fp);
  55         }
  56
  57         if (fp2!=NULL) {
  58                 if (verbose) fprintf(stderr, " close files (2) ...\n");
  59                 (void) fflush(fp2);
  60                 (void) fclose(fp2);
  61         }
  62
  63         // interactive mode?
  64         if (mz_port) {
  65                 if (verbose) fprintf(stderr, " clear mops list...\n");
  66                 mops_cleanup(mp_head);
  67                 if (verbose) fprintf(stderr, " clear automops list...\n");
  68                 automops_cleanup(amp_head);
  69                 if (verbose) fprintf(stderr, " clear packet sequences...\n");
  70                 mz_ll_delete_list(packet_sequences);
  71         }
  72
  73         for (i=0; i<device_list_entries; i++) {
  74                 if (device_list[i].p_arp!=NULL) {
  75                         pcap_close(device_list[i].p_arp);
  76                         fprintf(stderr, " stopped ARP process for device %s\n", device_list[i].dev);
  77                 }
  78                 if (device_list[i].arprx_thread!=0) {
  79                         pthread_cancel(device_list[i].arprx_thread);
  80                         if (verbose)
  81                                 fprintf(stderr, " (ARP thread for device %s done)\n", device_list[i].dev);
  82                 }
  83
  84                 if (device_list[i].arp_table!=NULL) {
  85                         cur=device_list[i].arp_table;
  86                         while (cur!=NULL) {
  87                                 next = cur->next;
  88                                 if (cur!=NULL) free(cur);
  89                                 cur=next;
  90                         }
  91                 }
  92
  93                 // close packet sockets
  94                 if (device_list[i].ps>=0) {
  95                         close(device_list[i].ps);
  96                 }
  97
  98         }
  99
 100         if (verbose) fprintf(stderr, "finished.\n");
 101         exit(sig);
 102 }
 103
 104
 105 static void help(void)
 106 {
 107         printf("\nmausezahn %s, a fast versatile traffic generator\n", VERSION_STRING);
 108         puts("http://www.netsniff-ng.org\n\n"
 109              "Usage: mausezahn [options] [interface] <keyword>|<arg-string>|<hex-string>\n"
 110              "Options:\n"
 111              "  -x <port>             Interactive mode with telnet CLI, default port: 25542\n"
 112              "  -l <ip>               Listen address to bind to when in interactive mode, default: 0.0.0.0\n"
 113              "  -4                    IPv4 mode (default)\n"
 114              "  -6                    IPv6 mode\n"
 115              "  -c <count>            Send packet count times, default:1, infinite:0\n"
 116              "  -d <delay>            Apply delay between transmissions. The delay value can be\n"
 117              "                        specified in usec (default, no additional unit needed), or in\n"
 118              "                        msec (e.g. 100m or 100msec), or in seconds (e.g. 100s or 100sec)\n"
 119              "  -r                    Multiplies the specified delay with a random value\n"
 120              "  -p <length>           Pad the raw frame to specified length (using random bytes)\n"
 121              "  -a <srcmac|keyword>   Use specified source mac address, no matter what has\n"
 122              "                        been specified with other arguments; keywords see below,\n"
 123              "                        Default is own interface\n"
 124              "  -b <dstmac|keyword>   Same with destination mac address; keywords:\n"
 125              "     rand               Use a random MAC address\n"
 126              "     bc                 Use a broadcast MAC address\n"
 127              "     own                Use own interface MAC address (default for source MAC)\n"
 128              "     stp                Use IEEE 802.1d STP multicast address\n"
 129              "     cisco              Use Cisco multicast address as used for CDP, VTP, or PVST+\n"
 130              "  -A <srcip>            Use specified source IP address (default is own interface IP)\n"
 131              "  -B <dstip|dnsname>    Send packet to specified destination IP or domain name\n"
 132              "  -P <ascii payload>    Use the specified ASCII payload\n"
 133              "  -f <filename>         Read the ASCII payload from a file\n"
 134              "  -F <filename>         Read the hexadecimal payload from a file\n"
 135              "  -Q <[CoS:]vlan>       Specify 802.1Q VLAN tag and optional Class of Service, you can\n"
 136              "                        specify multiple 802.1Q VLAN tags (QinQ...) by separating them\n"
 137              "                        via a comma or a period (e.g. '5:10,20,2:30')\n"
 138              "  -t <packet-type|help> Specify packet type for autobuild (you don't need to care for\n"
 139              "                        encapsulations in lower layers, most packet types allow/require\n"
 140              "                        additional packet-specific arguments in an <arg-string>;\n"
 141              "                        Currently supported types: arp, bpdu, cdp, ip, icmp, udp, tcp,\n"
 142              "                        dns, rtp, syslog, lldp and more;\n"
 143              "                        For context-help use 'help' as <arg-string>!\n"
 144              "  -T <packet-type>      Specify packet type for server mode, currently only rtp is supported;\n"
 145              "                        Enter -T help or -T rtp help for further information\n"
 146              "  -M <MPLS-label>       Insert a MPLS label, enter '-M help' for a syntax description\n"
 147              "  -V|VV|...             Verbose and more verbose mode\n"
 148              "  -q                    Quiet mode, even omit 'important' standard short messages\n"
 149              "  -S                    Simulation mode: DOES NOT put anything on the wire, this is\n"
 150              "                        typically combined with one of the verbose modes (v or V)\n"
 151              "  -v                    Show version\n"
 152              "  -h                    Print this help\n\n"
 153              "Examples:\n"
 154              "  mausezahn -x 99\n"
 155              "  mausezahn -c 0 -d 2s -t bpdu conf\n"
 156              "  mausezahn -t cdp change -c 0\n"
 157              "  mausezahn -t syslog sev=3 -P \"You have been mausezahned.\" -A 10.1.1.109 -B 192.168.7.7\n"
 158              "  mausezahn eth0 -A rand -B 1.1.1.1 -c 0 -t tcp \"dp=1-1023, flags=syn\"\n\n"
 159              "Note:\n"
 160              "  This tool is targeted for network developers! You should\n"
 161              "  be aware of what you are doing and what these options above\n"
 162              "  mean! Only use this tool in an isolated LAN that you own!\n\n"
 163              "Please report bugs to <bugs@netsniff-ng.org>\n"
 164              "Copyright (C) 2008-2010 Herbert Haas <herbert@perihel.at>,\n"
 165              "Copyright (C) 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
 166              "Swiss federal institute of technology (ETH Zurich)\n"
 167              "License: GNU GPL version 2.0\n"
 168              "This is free software: you are free to change and redistribute it.\n"
 169              "There is NO WARRANTY, to the extent permitted by law.\n");
 170         die();
 171 }
 172
 173 static void version(void)
 174 {
 175         printf("\nmausezahn %s, Git id: %s\n", VERSION_LONG, GITVERSION);
 176         puts("a fast versatile traffic generator\n"
 177              "http://www.netsniff-ng.org\n\n"
 178              "Please report bugs to <bugs@netsniff-ng.org>\n"
 179              "Copyright (C) 2008-2010 Herbert Haas <herbert@perihel.at>,\n"
 180              "Copyright (C) 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
 181              "Swiss federal institute of technology (ETH Zurich)\n"
 182              "License: GNU GPL version 2.0\n"
 183              "This is free software: you are free to change and redistribute it.\n"
 184              "There is NO WARRANTY, to the extent permitted by law.\n");
 185         die();
 186 }
 187
 188 int reset(void)
 189 {
 190    int i;
 191    time_t t;
 192
 193    // Determine platform type sizes:
 194    MZ_SIZE_LONG_INT = sizeof(long int);
 195
 196    mz_default_config_path[0] = 0x00;
 197    mz_default_log_path[0] = 0x00;
 198
 199    // Reset globals:
 200    quiet = 0;
 201    ipv6_mode = 0;
 202    verbose = 0;
 203    simulate = 0;
 204    filename[0] = '\0';
 205    path[0] = '\0';
 206    gind=0;
 207    gind_max = TIME_COUNT;
 208    fp = NULL;
 209    fp2 = NULL;
 210    mz_port = 0;
 211    mz_rand = 0;
 212    char mz_listen_addr[16] = "0.0.0.0";
 213    mp_head = NULL;
 214
 215    for (i=0;i<TIME_COUNT_MAX;i++) jitter[i] = 0;
 216
 217    time0_flag = 0; // If set then time0 has valid data
 218    sqnr0_flag = 0; // If set then sqnr_last and sqnr_next has valid data
 219    rtp_log = 0;
 220    mz_ssrc[0]=0; mz_ssrc[1]=0; mz_ssrc[2]=0; mz_ssrc[3]=0;
 221
 222    // Reset mgmt parameters of TX:
 223    tx.packet_mode = 1;     // assume we don't care about L2
 224    tx.count = 1;
 225    tx.delay = DEFAULT_DELAY;
 226    tx.arg_string[0] = '\0';
 227
 228    // Reset Ethernet parameters of TX:
 229    tx.eth_params_already_set = 0;
 230    for (i=0; i<6; i++)   tx.eth_dst[i] = 0xff;
 231    for (i=0; i<6; i++)   tx.eth_src[i] = 0; // TODO: Get own MAC !!!
 232    tx.eth_dst_txt[0] = '\0';
 233    tx.eth_src_txt[0] = '\0';
 234    tx.eth_dst_rand = 0;
 235    tx.eth_src_rand = 0;
 236
 237    tx.eth_type = 0x800;
 238    tx.eth_len = 0;
 239    tx.eth_payload[0] = '\0';
 240    tx.eth_payload_s = 0;
 241    tx.padding = 0;
 242
 243    // Reset CDP parameters for TX:
 244    tx.cdp_sum  = 0;
 245    tx.cdp_version = 0;
 246    tx.cdp_ttl = 0;
 247    tx.cdp_payload[0] = '\0';
 248    tx.cdp_payload_s = 0;
 249    tx.cdp_tlv_id[0] = '\0';
 250    tx.cdp_tlv_id_len = 0;
 251
 252    // Reset 802.1Q parameters of TX:
 253    tx.dot1Q=0;
 254    tx.dot1Q_txt[0] = '\0';
 255
 256    // ASCII Payload:
 257    tx.ascii = 0;                       // 1 if specified
 258    tx.ascii_payload[0]= '\0';
 259
 260    // HEX Payload:
 261    tx.hex_payload_s = 0;
 262
 263    // Reset MPLS parameters of TX:
 264    tx.mpls = 0;
 265    tx.mpls_txt[0] = '\0';
 266    tx.mpls_label = 0;
 267    tx.mpls_exp = 0;
 268    tx.mpls_bos = 1;
 269    tx.mpls_ttl = 255;
 270    tx.mpls_verbose_string[0] = '\0';
 271
 272    // Reset IP parameters of TX:
 273    tx.ip_src_txt[0] = '\0';
 274    tx.ip_src_rand = 0;
 275    tx.ip_dst_txt[0] = '\0';
 276    tx.ip_src_isrange = 0;
 277    tx.ip_src_start = 0;
 278    tx.ip_src_stop = 0;
 279
 280    tx.ip_dst_start = 0;
 281    tx.ip_dst_stop = 0;
 282    tx.ip_dst_isrange = 0;
 283
 284    tx.ip_ttl = 0;
 285    tx.ip_len = 0;
 286    tx.ip_payload[0]= '\0';
 287    tx.ip_payload_s = 0;
 288    tx.ip_option[0]= '\0';
 289    tx.ip_option_s = 0;
 290
 291    // Reset ICMP parameters:
 292    tx.icmp_type=0;
 293    tx.icmp_code=0;
 294    tx.icmp_chksum=0;            // 0=autofill
 295    tx.icmp_ident=0x42;
 296    tx.icmp_sqnr=0x1;
 297    tx.icmp_payload_s=0;
 298
 299    // Reset general L4 parameters:
 300    tx.sp = 0;
 301    tx.dp = 0;
 302    tx.sp_start = 0;
 303    tx.sp_stop = 0;
 304    tx.dp_start = 0;
 305    tx.dp_stop = 0;
 306    tx.sp_isrange = 0;
 307    tx.dp_isrange = 0;
 308
 309    // Reset UDP parameters of TX:
 310
 311    tx.udp_len = 0;                    // If set to zero then create_udp_packet will calculate it
 312    tx.udp_sum = 0;
 313    tx.udp_payload[0] = '\0';
 314    tx.udp_payload_s = 0;
 315
 316    // Reset TCP parameters of TX:
 317
 318    tx.tcp_seq = 42;
 319    tx.tcp_seq_stop = 42;
 320    tx.tcp_seq_delta = 0;              // also used as 'isrange' meaning
 321    tx.tcp_ack = 42;
 322    tx.tcp_control = 0;
 323    tx.tcp_win = 10000;
 324    tx.tcp_sum = 0;
 325    tx.tcp_urg = 0;
 326    tx.tcp_len = 20;                   // Least size (TCP header only)
 327    tx.tcp_payload[0] = '\0';
 328    tx.tcp_payload_s = 0;
 329
 330    // Reset RTP parameters of TX:
 331    tx.rtp_sqnr = 0;
 332    tx.rtp_stmp = 0;
 333
 334    // Initialize random generator
 335    time(&t);
 336    srand((unsigned int)t);
 337
 338    // Reset device_list
 339    for (i=0; i<MZ_MAX_DEVICES; i++) {
 340            device_list[i].arprx_thread = 0;
 341            device_list[i].p_arp = NULL;
 342            device_list[i].arp_table = NULL;
 343            device_list[i].ps=-1;
 344            device_list[i].cli=0;
 345            device_list[i].mgmt_only=0;
 346    }
 347
 348    return 0;
 349 }
 350
 351 static void print_packet_types(void)
 352 {
 353         fprintf(stderr, "\n"
 354             MAUSEZAHN_VERSION
 355             "\n"
 356             "|  The following packet types are currently implemented:\n"
 357             "|\n"
 358             "|  arp            ... sends ARP packets\n"
 359             "|  bpdu           ... sends BPDU packets (STP or PVST+)\n"
 360             "|  cdp            ... sends CDP messages\n"
 361             "|  ip             ... sends IPv4 packets\n"
 362             "|  udp            ... sends UDP datagrams\n"
 363             "|  tcp            ... sends TCP segments\n"
 364             "|  icmp           ... sends ICMP messages\n"
 365             "|  igmp           ... sends IGMP messages\n"
 366             "|  dns            ... sends DNS messages\n"
 367             "|  rtp            ... sends RTP datagrams\n"
 368             "|  syslog         ... sends Syslog messages\n"
 369             "|\n"
 370             "| Of course you can build any other packet type 'manually' using the direct layer 2 mode.\n"
 371             "| FYI: The interactive mode supports additional protocols. (Try mz -x <port>)\n"
 372             "\n");
 373
 374         die();
 375 }
 376
 377 // Purpose: Properly handle arguments and configure global structs (tx)
 378 int getopts (int argc, char *argv[])
 379 {
 380         int i, c, rargs, RX=0, count_set=0, delay_set=0;
 381         unsigned int time_factor;
 382         char *packet_type=NULL, *mops_type=NULL;
 383         char *dum;
 384         unsigned char *dum1, *dum2;
 385         bool do_help = false;
 386
 387         libnet_t       *l;
 388         char err_buf[LIBNET_ERRBUF_SIZE];
 389         struct libnet_ether_addr *mymac;
 390
 391         FILE *afp;
 392         char hexpld[MAX_PAYLOAD_SIZE*2];
 393         int hexpld_specified=0;
 394
 395         opterr = 1; // let getopt print error message if necessary
 396
 397
 398         while ((c = getopt(argc, argv, short_options)) != -1)
 399                 switch (c) {
 400                  case '4':
 401                         tx.eth_type = 0x0800;
 402                         ipv6_mode=0;
 403                         break;
 404                  case '6':
 405                         tx.eth_type = 0x86dd;
 406                         ipv6_mode=1;
 407                         break;
 408                  case 'h':
 409                         help();
 410                         break;
 411                  case 'q':
 412                         quiet=1;
 413                         break;
 414                  case 'v':
 415                         version();
 416                         break;
 417                  case 'V':
 418                         verbose++;
 419                         break;
 420                  case 'S':
 421                         simulate=1;
 422                         break;
 423                  case 'x':
 424                         mz_port = MZ_DEFAULT_PORT;
 425                         break;
 426                  case 'l':
 427                         strncpy (mz_listen_addr, optarg, sizeof(mz_listen_addr));
 428                         break;
 429                  case 'a':
 430                         strncpy (tx.eth_src_txt, optarg, 32);
 431                         tx.packet_mode = 0;
 432                         break;
 433                  case 'A':
 434                         strncpy (tx.ip_src_txt, optarg, sizeof(tx.ip_src_txt));
 435                         break;
 436                  case 'b':
 437                         strncpy (tx.eth_dst_txt, optarg, 32);
 438                         tx.packet_mode = 0;
 439                         break;
 440                  case 'B':
 441                         strncpy (tx.ip_dst_txt, optarg, sizeof(tx.ip_dst_txt));
 442                         break;
 443                  case 'c':
 444                         errno=0;
 445                         tx.count = strtol(optarg, (char **)NULL, 10);
 446                         if ((errno == ERANGE && (tx.count == LONG_MAX || tx.count == LONG_MIN))
 447                             || (errno != 0 && tx.count == 0)) {
 448                                 perror("strtol");
 449                                 return (-1);
 450                         }
 451                         if (tx.count<0) tx.count=1;       //TODO: Allow count=0 which means infinity (need to update all send_functions)
 452                         count_set=1;
 453                         break;
 454                  case 'd':
 455                         errno=0;
 456                         // determine whether seconds or msecs are used
 457                         // default is usec!!!
 458                         time_factor=1;
 459                         if (exists(optarg,"s") || exists(optarg,"sec")) time_factor=1000000;
 460                         if (exists(optarg,"m") || exists(optarg,"msec")) time_factor=1000;
 461                         dum = strtok(optarg,"ms");
 462                         tx.delay = strtol(dum, (char **)NULL, 10) * time_factor;
 463                         if ((errno == ERANGE && (tx.delay == LONG_MAX || tx.delay == LONG_MIN))
 464                             || (errno != 0 && tx.delay == 0)) {
 465                                 perror("strtol");
 466                                 return (-1);
 467                         }
 468                         if (tx.delay<0) tx.delay=0; // no delay
 469                         delay_set=1;
 470                         break;
 471                  case 'p':
 472                         errno=0;
 473                         tx.padding = strtol(optarg, (char **)NULL, 10);
 474                         if ((errno == ERANGE && (tx.padding == LONG_MAX || tx.padding == LONG_MIN))
 475                             || (errno != 0 && tx.padding == 0))  {
 476                                 perror("strtol");
 477                                 return (-1);
 478                         }
 479                         if (tx.padding>10000) {
 480                                 fprintf(stderr, " Warning: Padding must not exceed 10000!\n");
 481                                 return -1;
 482                         }
 483                         break;
 484                  case 't':
 485                         packet_type = optarg; // analyzed below
 486                         if (strcmp(packet_type,"help") == 0)
 487                                 print_packet_types();
 488                         break;
 489                  case 'X':
 490                         mops_type = optarg; // MOPS TRANSITION STRATEGY -- analyzed below
 491                         break;
 492                  case 'T':
 493                         packet_type = optarg;
 494                         RX = 1;
 495                         break;
 496                  case 'r':
 497                         mz_rand = 1;
 498                         break;
 499                  case 'M':
 500                         if (strncmp(optarg,"help",4)==0) {
 501                                 (void) get_mpls_params("help ");
 502                         }
 503                         else {
 504                                 strncpy (tx.mpls_txt, optarg, 128);
 505                                 tx.eth_type = ETHERTYPE_MPLS;
 506                                 tx.packet_mode = 0;
 507                                 tx.mpls=1;
 508                         }
 509                         break;
 510                  case 'P':  // ASCII payload
 511                         strncpy((char*)tx.ascii_payload,  optarg, MAX_PAYLOAD_SIZE);
 512                         tx.ascii = 1;
 513                         break;
 514                  case 'f': // ASCII payload in FILE
 515                         afp = fopen(optarg, "r");
 516                         if (fgets((char*)tx.ascii_payload, MAX_PAYLOAD_SIZE, afp) == NULL)
 517                                 fprintf(stderr, " mz/getopts: File empty?\n");
 518                         fclose(afp);
 519                         tx.ascii = 1;
 520                         break;
 521                  case 'F': // HEX payload in FILE
 522                         afp = fopen(optarg, "r");
 523                         i=0;
 524                         while ( (hexpld[i]=fgetc(afp))!=EOF ) {
 525                                 if (isspace(hexpld[i])) {
 526                                         hexpld[i]=':';
 527                                 }
 528                                 i++;
 529                         }
 530                         hexpld[i]='\0';
 531                         fclose(afp);
 532                         hexpld_specified=1;
 533                         break;
 534                  case 'Q': // VLAN TAG
 535                         if (strncmp(optarg,"help",4)==0) {
 536                                 print_dot1Q_help(); // ugly but most simple and safe solution
 537                         }
 538                         else {
 539                                 strncpy (tx.dot1Q_txt, optarg, 32);
 540                                 tx.dot1Q=1;
 541                                 // determine number of VLAN tags
 542                                 for (i=0; i<strlen(tx.dot1Q_txt); i++) {
 543                                         if (tx.dot1Q_txt[i]==',') tx.dot1Q++;
 544                                 }
 545                                 tx.packet_mode = 0;
 546                         }
 547                         break;
 548                  case '?':
 549                         if ((optopt == 'a') || (optopt == 'b') || (optopt = 'c') ||
 550                             (optopt == 'd') || (optopt == 'f') || (optopt = 'p') ||
 551                             (optopt == 't') || (optopt == 'm'))
 552                                 fprintf (stderr, " mz/getopts: Option -%c requires an argument.\n", optopt);
 553                         else if (isprint (optopt))
 554                                 fprintf (stderr, " mz/getopts: Unknown option -%c'.\n", optopt);
 555                         else
 556                                 fprintf (stderr, " mz/getopts: Unknown option character \\x%x'.\n", optopt);
 557                         return 1;
 558                  default:
 559                         fprintf (stderr," mz/getopts: Could not handle arguments properly!\n");
 560                         return 1;
 561                 }
 562
 563         // ********************************************
 564         //       Handle additional arguments
 565         // ********************************************
 566         //
 567         // Greeting text
 568         if (verbose) {
 569                 fprintf(stderr,"\n"
 570                         MAUSEZAHN_VERSION
 571                         "\n"
 572                         "Use at your own risk and responsibility!\n"
 573                         "-- Verbose mode --\n"
 574                         "\n");
 575         }
 576
 577         if (argc<2) {
 578                 help();
 579         }
 580
 581         if ((rargs=argc-optind)>2) {  // number of remaining arguments
 582                 fprintf(stderr," mz/getopts: Too many arguments!\n");
 583                 return -1;
 584         }
 585
 586
 587         // There can be 0-2 additional arguments
 588         switch (rargs) {
 589          case 0:
 590                 if (lookupdev()) { // no device found
 591                         if (verbose) fprintf(stderr, " mz: no active interfaces found!\n");
 592                         strcpy(tx.device, "lo");
 593                 }
 594                 break;
 595          case 1: // arg_string OR device given => find out!
 596                 if ( (strncmp(argv[optind],"eth",3)==0)
 597                      || (strncmp(argv[optind],"ath",3)==0)
 598                      || ((strncmp(argv[optind],"lo",2)==0)&&(strncmp(argv[optind],"log",3)!=0))
 599                      || (strncmp(argv[optind],"vmnet",5)==0)
 600                      || (strncmp(argv[optind],"wifi",4)==0) ) {
 601                         // device has been specified!
 602                         strncpy (tx.device, argv[optind], 16);
 603                 }
 604                 else { /// arg_string given => no device has been specified -- let's find one!
 605                         strncpy (tx.arg_string, argv[optind], MAX_PAYLOAD_SIZE);
 606                         do_help = !!getarg(tx.arg_string,"help", NULL);
 607                         if (!do_help) {
 608                                 if (lookupdev()) {
 609                                         /* no device found */
 610                                         if (verbose)
 611                                                 fprintf(stderr, " mz: no active interfaces found!\n");
 612                                         strcpy(tx.device, "lo");
 613                                 }
 614                                 if (verbose)
 615                                         fprintf(stderr," mz: device not given, will use %s\n",tx.device);
 616                         }
 617                 }
 618                 break;
 619          case 2: // both device and arg_string given
 620                 strncpy (tx.device, argv[optind], 16);
 621                 strncpy (tx.arg_string, argv[optind+1], MAX_PAYLOAD_SIZE);
 622                 break;
 623          default:
 624                 fprintf(stderr," mz/getopts: Unknown argument problem!\n");
 625                 return 1;
 626         }
 627
 628         if (hexpld_specified) {
 629                 strcat(tx.arg_string, ",p=");
 630                 strcat(tx.arg_string, hexpld);
 631         }
 632
 633
 634         //////////////////////////////////////////////////////////////////////////
 635         //
 636         // Initialize MAC and IP Addresses.
 637         //
 638         // - tx.eth_src = own interface MAC
 639         // - tx.ip_src  = own interface IP or user specified
 640         // - tx.ip_dst  = 255.255.255.255 or user specified (can be a range)
 641         // - tx.ip_src_rand ... is set if needed.
 642         //
 643
 644         // Get own device MAC address:
 645         // Don't open context if only a help text is requested
 646         if  (!do_help && getarg(tx.arg_string,"help", NULL) !=1) {
 647                 l = libnet_init (LIBNET_LINK_ADV, tx.device, err_buf );
 648                 if (l == NULL) {
 649                         fprintf(stderr, " mz/getopts: libnet_init() failed (%s)", err_buf);
 650                         return -1;
 651                 }
 652                 mymac = libnet_get_hwaddr(l);
 653                 for (i=0; i<6; i++) {
 654                         tx.eth_src[i] = mymac->ether_addr_octet[i];
 655                         tx.eth_mac_own[i] = mymac->ether_addr_octet[i];
 656                 }
 657
 658                 // Set source IP address:
 659                 if (strlen(tx.ip_src_txt)) { // option -A has been specified
 660                         if (mz_strcmp(tx.ip_src_txt, "bcast", 2)==0) {
 661                                 tx.ip_src = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
 662                         } else if (strcmp(tx.ip_src_txt, "rand") == 0) {
 663                                 tx.ip_src_rand = 1;
 664                                 tx.ip_src_h  = (u_int32_t) ( ((float) rand()/RAND_MAX)*0xE0000000); //this is 224.0.0.0
 665                         }
 666                         else if (get_ip_range_src(tx.ip_src_txt)) { // returns 1 when no range has been specified
 667                                 // name2addr4 accepts a DOTTED DECIMAL ADDRESS or a FQDN:
 668                                 if (ipv6_mode)
 669                                         tx.ip6_src = libnet_name2addr6 (l, tx.ip_src_txt, LIBNET_RESOLVE);
 670                                 else
 671                                         tx.ip_src = libnet_name2addr4 (l, tx.ip_src_txt, LIBNET_RESOLVE);
 672                         }
 673                 }
 674                 else { // no source IP specified: by default use own IP address
 675                         if (ipv6_mode) {
 676                                 tx.ip6_src = libnet_get_ipaddr6(l);
 677                                 if (strncmp((char*)&tx.ip6_src,(char*)&in6addr_error,sizeof(in6addr_error))==0)
 678                                         printf("Failed to set source IPv6 address: %s", l->err_buf);
 679                         }
 680                         else
 681                                 tx.ip_src = libnet_get_ipaddr4(l);
 682                 }
 683
 684                 // Set destination IP address:
 685                 if (strlen(tx.ip_dst_txt)) {  // option -B has been specified
 686                         if (mz_strcmp(tx.ip_dst_txt, "rand", 2)==0) {
 687                                 fprintf(stderr, "Option -B does not support random destination IP addresses currently.\n");
 688                                 return 1;
 689                         }
 690
 691                         if (mz_strcmp(tx.ip_dst_txt, "bcast", 2)==0) {
 692                                 tx.ip_dst = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
 693                         } else if (get_ip_range_dst(tx.ip_dst_txt)) { // returns 1 when no range has been specified
 694                                 // name2addr4 accepts a DOTTED DECIMAL ADDRESS or a FQDN:
 695                                 if (ipv6_mode)
 696                                         tx.ip6_dst = libnet_name2addr6 (l, tx.ip_dst_txt, LIBNET_RESOLVE);
 697                                 else
 698                                         tx.ip_dst = libnet_name2addr4 (l, tx.ip_dst_txt, LIBNET_RESOLVE);
 699                         }
 700                 }
 701                 else { // no destination IP specified: by default use broadcast
 702                         tx.ip_dst = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
 703                 }
 704
 705                 // Initialize tx.ip_src_h and tx.ip_dst_h which are used by 'print_frame_details()'
 706                 // in verbose mode. See 'modifications.c'.
 707
 708                 if (tx.ip_src_rand) { // ip_src_h already given, convert to ip_src
 709                         dum1 = (unsigned char*) &tx.ip_src_h;
 710                         dum2 = (unsigned char*) &tx.ip_src;
 711                 }
 712                 else { // ip_src already given, convert to ip_src_h
 713                         dum1 = (unsigned char*) &tx.ip_src;
 714                         dum2 = (unsigned char*) &tx.ip_src_h;
 715                 }
 716
 717                 *dum2 = *(dum1+3);
 718                 dum2++;
 719                 *dum2 = *(dum1+2);
 720                 dum2++;
 721                 *dum2 = *(dum1+1);
 722                 dum2++;
 723                 *dum2 = *dum1;
 724
 725                 dum1 = (unsigned char*) &tx.ip_dst;
 726                 dum2 = (unsigned char*) &tx.ip_dst_h;
 727
 728                 *dum2 = *(dum1+3);
 729                 dum2++;
 730                 *dum2 = *(dum1+2);
 731                 dum2++;
 732                 *dum2 = *(dum1+1);
 733                 dum2++;
 734                 *dum2 = *dum1;
 735
 736                 libnet_destroy(l);
 737         }
 738
 739         //
 740         // END OF ADDRESS INITIALIZATION
 741         //
 742         //////////////////////////////////////////////////////////////////////////
 743
 744
 745         ////// retrieve interface parameters ///////
 746
 747         for (i=0; i<device_list_entries; i++) {
 748                 get_dev_params(device_list[i].dev);
 749         }
 750
 751
 752         //////////////////////////////////////////////////////////////////////////
 753         //
 754         //  Mausezahn CLI desired?
 755         if (mz_port) {
 756                 // has port number been specified?
 757                 if (strlen(tx.arg_string)) {
 758                         mz_port = (int) str2int (tx.arg_string);
 759                 }
 760
 761                 mz_cli_init();
 762                 cli();
 763         }
 764
 765         //////////////////////////////////////////////////////////////////////////
 766         //
 767         //                 Mode decision
 768         //
 769         // Consider -t and -m option (used exclusively)
 770         //   -t => special packet types, stateless
 771         //
 772         // If -t not present then evaluate arg_string which must
 773         // contain a byte-string in hexadecimal notation.
 774         //
 775         //
 776
 777         // ***** NEW: MOPS TRANSITION STRATEGY *****
 778         if (mops_type != NULL) {
 779
 780                 if (mz_strcmp(mops_type,"lldp",4)==0) {
 781                         mops_direct(tx.device, MOPS_LLDP, tx.arg_string);
 782                 }
 783         }
 784
 785
 786         if (packet_type == NULL) { // raw hex string given
 787                 mode = BYTE_STREAM;
 788         }
 789         else if (strcmp(packet_type,"arp")==0) {
 790                 mode = ARP;
 791         }
 792         else if (strcmp(packet_type,"bpdu")==0) {
 793                 mode = BPDU;
 794         }
 795         else if (strcmp(packet_type,"ip")==0) {
 796                 mode = IP;
 797         }
 798         else if (strcmp(packet_type,"udp")==0) {
 799                 mode = UDP;
 800         }
 801         else if (strcmp(packet_type,"icmp")==0) {
 802                 mode = ICMP;
 803         }
 804         else if (strcmp(packet_type,"icmp6")==0) {
 805                 mode = ICMP6;
 806         }
 807         else if (strcmp(packet_type,"tcp")==0) {
 808                 mode = TCP;
 809         }
 810         else if (strcmp(packet_type,"dns")==0) {
 811                 mode = DNS;
 812         }
 813         else if (strcmp(packet_type,"cdp")==0) {
 814                 mode = CDP;
 815         }
 816         else if (strcmp(packet_type,"syslog")==0) {
 817                 mode = SYSLOG;
 818         }
 819         else if (strcmp(packet_type, "igmp") == 0) {
 820                 mode = IGMP;
 821         }
 822         else if (strcmp(packet_type,"lldp")==0) {
 823                 mode = LLDP;
 824                 tx.packet_mode=0; // create whole frame by ourself
 825         }
 826         else if (strcmp(packet_type,"rtp")==0) {
 827                 if (RX) {
 828                         mode = RX_RTP;
 829                 }
 830                 else {
 831                         mode = RTP;
 832                         if (!count_set) tx.count = 0;
 833                         if (!delay_set) tx.delay = 20000; // 20 msec inter-packet delay for RTP
 834                 }
 835         }
 836         else {
 837                 fprintf(stderr, " mz: you must specify a valid packet type!\n");
 838         }
 839
 840
 841         //////////////////////////////////////////////////////////////////////////
 842
 843         // TODO: Implement macro support
 844         //       Check macro types here
 845
 846         return 0;
 847 }
 848
 849 int main(int argc, char **argv)
 850 {
 851    // These handles are only used when creating L3 and above packets.
 852    libnet_t             *l;               // the context
 853    libnet_ptag_t         t2=0, t3=0, t4=0;      // handles to layers
 854    double cpu_time_used;
 855
 856    reset();
 857
 858    if ( getopts(argc, argv) )
 859      {
 860         (void) fprintf(stderr, " Invalid command line parameters!\n");
 861         help();
 862      }
 863
 864    // Check whether hires timers are supported or not:
 865    (void) check_timer();
 866
 867         signal(SIGINT, signal_handler);  // to close all file pointers etc upon SIGINT
 868
 869    switch (mode)
 870      {
 871       case BYTE_STREAM:
 872         send_eth();
 873         break;
 874
 875       case ARP:
 876         (void) send_arp();
 877         break;
 878
 879       case BPDU:
 880         (void) send_bpdu();
 881         break;
 882
 883       case CDP:
 884         (void) send_cdp();
 885         break;
 886
 887       case IP:                        // From now on a new much more modular method is used:
 888         l = get_link_context();
 889         t3 = create_ip_packet(l);     // t3 can be used for later header changes
 890         if (!quiet) complexity();
 891         if (tx.packet_mode==0)        // Ethernet manipulation features does NOT use ARP to determine eth_dst
 892           t2 = create_eth_frame(l, t3, t4);   // t2 can be used for later header changes
 893         else
 894           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
 895         break;
 896
 897       case ICMP:
 898         tx.ip_proto = 1;
 899         l = get_link_context();
 900         t4 = create_icmp_packet(l);    // t4 can be used for later header changes
 901         t3 = create_ip_packet(l);      // t3 can be used for later header changes
 902         if (!quiet) complexity();
 903         if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst
 904           t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
 905         else
 906           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
 907         break;
 908
 909       case ICMP6:
 910         tx.ip_proto = 58;
 911         l = get_link_context();
 912         t4 = create_icmp6_packet(l);    // t4 can be used for later header changes
 913         t3 = create_ip_packet(l);       // t3 can be used for later header changes
 914         if (ipv6_mode)
 915           update_ISUM(l, t4);
 916         if (!quiet) complexity();
 917         if (tx.packet_mode==0)          // Ethernet manipulation features does NOT use ARP to determine eth_dst
 918           t2 = create_eth_frame(l, t3, t4);     // t2 can be used for later header changes
 919         else
 920           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
 921         break;
 922
 923       case UDP:
 924         tx.ip_proto = 17;
 925         l = get_link_context();
 926         t4 = create_udp_packet(l);     // t4 can be used for later header changes
 927         t3 = create_ip_packet(l);      // t3 can be used for later header changes
 928         if (ipv6_mode)
 929           update_USUM(l, t4);
 930         if (!quiet) complexity();
 931         if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst
 932           t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
 933         else
 934           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
 935         break;
 936
 937       case TCP:
 938         tx.ip_proto = 6;
 939         l = get_link_context();
 940         t4 = create_tcp_packet(l);     // t4 can be used for later header changes
 941         t3 = create_ip_packet(l);      // t3 can be used for later header changes
 942         if (ipv6_mode)
 943           update_TSUM(l, t4);
 944         if (!quiet) complexity();
 945         if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst
 946           t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
 947         else
 948           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
 949         break;
 950
 951       case IGMP:
 952         tx.ip_proto = 2;
 953         l = get_link_context();
 954         t4 = create_igmp_packet(l);
 955         /* t3 can be used for later header changes */
 956         t3 = create_ip_packet(l);
 957         if (!quiet)
 958                 complexity();
 959
 960         /* Ethernet manipulation features does NOT use ARP to determine eth_dst
 961          * */
 962         if (tx.packet_mode == 0)
 963                 t2 = create_eth_frame(l, t3, t4); // t2 can be used for later header changes
 964         else
 965                 send_frame(l, t3, t4); // NOTE: send_frame also destroys context finaly
 966         break;
 967
 968       case DNS:
 969         tx.ip_proto = 17;
 970         l = get_link_context();
 971         (void) create_dns_packet();
 972         t4 = create_udp_packet(l);     // t4 can be used for later header changes
 973         t3 = create_ip_packet(l);      // t3 can be used for later header changes
 974         if (!quiet) complexity();
 975         if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst
 976           t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
 977         else
 978           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
 979         break;
 980
 981       case RTP:
 982         tx.ip_proto = 17;
 983         l = get_link_context();
 984         if (!quiet) fprintf(stderr, " mz: RTP mode! (count=%u, delay=%u usec)\n\n", tx.count, tx.delay);
 985         (void) create_rtp_packet();
 986         t4 = create_udp_packet(l);     // t4 can be used for later header changes
 987         t3 = create_ip_packet(l);      // t3 can be used for later header changes
 988         if (!quiet) complexity();
 989         if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst
 990           t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
 991         else
 992           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
 993         break;
 994
 995       case RX_RTP:  // Receive RTP packets
 996         rcv_rtp_init();
 997         rcv_rtp();
 998         break;
 999
1000       case SYSLOG:
1001         tx.ip_proto = 17;
1002         l = get_link_context();
1003         (void) create_syslog_packet();
1004         t4 = create_udp_packet(l);     // t4 can be used for later header changes
1005         t3 = create_ip_packet(l);      // t3 can be used for later header changes
1006         if (!quiet) complexity();
1007
1008         if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst
1009           t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
1010         else
1011           send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
1012         break;
1013
1014       case LLDP: // start with a new concept here
1015         //l = get_link_context();
1016         //(void) create_lldp_packet();
1017         // // // printf("SIZE=%lu\n",sizeof(struct tx_struct));
1018         fprintf(stderr, "LLDP is currently only supported via the interactive mode\n");
1019              exit(1);
1020         break;
1021
1022
1023       default:
1024         (void) fprintf(stderr," mz/main: unknown mode! Stop.\n");
1025         return (1);
1026      }
1027
1028    if (!quiet)
1029      {
1030         mz_stop = clock();
1031         cpu_time_used = ((double) (mz_stop - mz_start)) / CLOCKS_PER_SEC;
1032         if (cpu_time_used > 0)
1033           {
1034              total_d /= cpu_time_used;
1035              fprintf(stderr, "%.2f seconds (%.Lf packets per second)\n",cpu_time_used,total_d);
1036           }
1037         else
1038           {
1039              fprintf(stderr, "\n");
1040           }
1041      }
1042
1043    return(0);
1044 }