summaryrefslogtreecommitdiff
path: root/staging/mausezahn.c
blob: de3a2e2c0df082584a8a886218cb776ae530cea3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
/*
 * netsniff-ng - the packet sniffing beast
 * Mausezahn, a fast versatile traffic generator
 * Copyright 2008, 2009, 2010 Herbert Haas.
 * Subject to the GPL, version 2.
 */

#define _GNU_SOURCE
#include <libnet.h>
#include <pcap/pcap.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <sys/time.h>
#include <time.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <stdarg.h>
 
#include "mz.h"
#include "cli.h"
#include "mops.h"
#include "config.h"
#include "llist.h"
#include "die.h"
#include "dev.h"

int verbose_level = 0;

static const char *short_options = "46hqvVSxra:A:b:B:c:d:E:f:F:l:p:P:t:T:M:Q:X:";

static void signal_handler(int number)
{
	clean_up(number);
}

void  clean_up(int sig)
{
	int i;
	struct arp_table_struct *cur, *next;
	
	if (!quiet) fprintf(stderr, "\nMausezahn cleans up...\n");
	
	if (fp != NULL) {
		verbose_l1(" close files (1) ...\n");

		fflush(fp);
		fclose(fp);
	}
   
	if (fp2!=NULL) {
		if (verbose) fprintf(stderr, " close files (2) ...\n");
		(void) fflush(fp2);
		(void) fclose(fp2);
	}

	// interactive mode?
	if (mz_port) { 
		if (verbose) fprintf(stderr, " clear mops list...\n");
		mops_cleanup(mp_head);
		if (verbose) fprintf(stderr, " clear automops list...\n");
		automops_cleanup(amp_head);
		if (verbose) fprintf(stderr, " clear packet sequences...\n");
		mz_ll_delete_list(packet_sequences);
	}

	for (i=0; i<device_list_entries; i++) {
		if (device_list[i].p_arp!=NULL) {
			pcap_close(device_list[i].p_arp);
			fprintf(stderr, " stopped ARP process for device %s\n", device_list[i].dev);
		}
		if (device_list[i].arprx_thread!=0) {
			pthread_cancel(device_list[i].arprx_thread);
			if (verbose) 
				fprintf(stderr, " (ARP thread for device %s done)\n", device_list[i].dev);
		}
		
		if (device_list[i].arp_table!=NULL) {
			cur=device_list[i].arp_table;
			while (cur!=NULL) {
				next = cur->next;
				if (cur!=NULL) free(cur);
				cur=next;
			}
		}
		
		// close packet sockets
		if (device_list[i].ps>=0) { 
			close(device_list[i].ps);
		}
		
	}

	if (verbose) fprintf(stderr, "finished.\n");
	exit(sig);
}


static void help(void)
{
	printf("\nmausezahn %s, a fast versatile traffic generator\n", VERSION_STRING);
	puts("http://www.netsniff-ng.org\n\n"
	     "Usage: mausezahn [options] [interface] <keyword>|<arg-string>|<hex-string>\n"
	     "Options:\n"
	     "  -x <port>             Interactive mode with telnet CLI, default port: 25542\n"
	     "  -l <ip>               Listen address to bind to when in interactive mode, default: 0.0.0.0\n"
	     "  -4                    IPv4 mode (default)\n"
	     "  -6                    IPv6 mode\n"
	     "  -c <count>            Send packet count times, default:1, infinite:0\n"
	     "  -d <delay>            Apply delay between transmissions. The delay value can be\n"
	     "                        specified in usec (default, no additional unit needed), or in\n"
	     "                        msec (e.g. 100m or 100msec), or in seconds (e.g. 100s or 100sec)\n"
	     "  -r                    Multiplies the specified delay with a random value\n"
	     "  -p <length>           Pad the raw frame to specified length (using random bytes)\n"
	     "  -a <srcmac|keyword>   Use specified source mac address, no matter what has\n"
	     "                        been specified with other arguments; keywords see below,\n"
	     "                        Default is own interface\n"
	     "  -b <dstmac|keyword>   Same with destination mac address; keywords:\n"
	     "     rand               Use a random MAC address\n"
	     "     bc                 Use a broadcast MAC address\n"
	     "     own                Use own interface MAC address (default for source MAC)\n"
	     "     stp                Use IEEE 802.1d STP multicast address\n"
	     "     cisco              Use Cisco multicast address as used for CDP, VTP, or PVST+\n"
	     "  -A <srcip>            Use specified source IP address (default is own interface IP)\n"
	     "  -B <dstip|dnsname>    Send packet to specified destination IP or domain name\n"
	     "  -P <ascii payload>    Use the specified ASCII payload\n"
	     "  -f <filename>         Read the ASCII payload from a file\n"
	     "  -F <filename>         Read the hexadecimal payload from a file\n"
	     "  -Q <[CoS:]vlan>       Specify 802.1Q VLAN tag and optional Class of Service, you can\n"
	     "                        specify multiple 802.1Q VLAN tags (QinQ...) by separating them\n"
	     "                        via a comma or a period (e.g. '5:10,20,2:30')\n"
	     "  -t <packet-type|help> Specify packet type for autobuild (you don't need to care for\n"
	     "                        encapsulations in lower layers, most packet types allow/require\n"
	     "                        additional packet-specific arguments in an <arg-string>;\n"
	     "                        Currently supported types: arp, bpdu, cdp, ip, icmp, udp, tcp,\n"
	     "                        dns, rtp, syslog, lldp and more;\n"
	     "                        For context-help use 'help' as <arg-string>!\n"
	     "  -T <packet-type>      Specify packet type for server mode, currently only rtp is supported;\n"
	     "                        Enter -T help or -T rtp help for further information\n"
	     "  -M <MPLS-label>       Insert a MPLS label, enter '-M help' for a syntax description\n"
	     "  -V|VV|...             Verbose and more verbose mode\n"
	     "  -q                    Quiet mode, even omit 'important' standard short messages\n"
	     "  -S                    Simulation mode: DOES NOT put anything on the wire, this is\n"
	     "                        typically combined with one of the verbose modes (v or V)\n"
	     "  -v                    Show version\n"
	     "  -h                    Print this help\n\n"
	     "Examples:\n"
	     "  mausezahn -x 99\n"
	     "  mausezahn -c 0 -d 2s -t bpdu conf\n"
	     "  mausezahn -t cdp change -c 0\n"
	     "  mausezahn -t syslog sev=3 -P \"You have been mausezahned.\" -A 10.1.1.109 -B 192.168.7.7\n"
	     "  mausezahn eth0 -A rand -B 1.1.1.1 -c 0 -t tcp \"dp=1-1023, flags=syn\"\n\n"
	     "Note:\n"
	     "  This tool is targeted for network developers! You should\n"
	     "  be aware of what you are doing and what these options above\n"
	     "  mean! Only use this tool in an isolated LAN that you own!\n\n"
	     "Please report bugs to <bugs@netsniff-ng.org>\n"
	     "Copyright (C) 2008-2010 Herbert Haas <herbert@perihel.at>,\n"
	     "Copyright (C) 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
	     "Swiss federal institute of technology (ETH Zurich)\n"
	     "License: GNU GPL version 2.0\n"
	     "This is free software: you are free to change and redistribute it.\n"
	     "There is NO WARRANTY, to the extent permitted by law.\n");
	die();
}

static void version(void)
{
	printf("\nmausezahn %s, Git id: %s\n", VERSION_LONG, GITVERSION);
	puts("a fast versatile traffic generator\n"
	     "http://www.netsniff-ng.org\n\n"
	     "Please report bugs to <bugs@netsniff-ng.org>\n"
	     "Copyright (C) 2008-2010 Herbert Haas <herbert@perihel.at>,\n"
	     "Copyright (C) 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
	     "Swiss federal institute of technology (ETH Zurich)\n"
	     "License: GNU GPL version 2.0\n"
	     "This is free software: you are free to change and redistribute it.\n"
	     "There is NO WARRANTY, to the extent permitted by law.\n");
	die();
}

int reset(void)
{
   int i;
   time_t t;

   // Determine platform type sizes:
   MZ_SIZE_LONG_INT = sizeof(long int);	     

   mz_default_config_path[0] = 0x00;
   mz_default_log_path[0] = 0x00;

   // Reset globals:
   quiet = 0;
   ipv6_mode = 0;
   verbose = 0;
   simulate = 0;
   filename[0] = '\0';
   path[0] = '\0';
   gind=0;
   gind_max = TIME_COUNT;
   fp = NULL;
   fp2 = NULL;
   mz_port = 0;
   mz_rand = 0;
   char mz_listen_addr[16] = "0.0.0.0";
   mp_head = NULL;

   for (i=0;i<TIME_COUNT_MAX;i++) jitter[i] = 0;      

   time0_flag = 0; // If set then time0 has valid data
   sqnr0_flag = 0; // If set then sqnr_last and sqnr_next has valid data
   rtp_log = 0;
   mz_ssrc[0]=0; mz_ssrc[1]=0; mz_ssrc[2]=0; mz_ssrc[3]=0;

   // Reset mgmt parameters of TX:
   tx.packet_mode = 1;     // assume we don't care about L2
   tx.count = 1;  
   tx.delay = DEFAULT_DELAY;      
   tx.arg_string[0] = '\0';
   
   // Reset Ethernet parameters of TX:
   tx.eth_params_already_set = 0;
   for (i=0; i<6; i++)   tx.eth_dst[i] = 0xff;
   for (i=0; i<6; i++)   tx.eth_src[i] = 0; // TODO: Get own MAC !!!
   tx.eth_dst_txt[0] = '\0';
   tx.eth_src_txt[0] = '\0';
   tx.eth_dst_rand = 0;
   tx.eth_src_rand = 0;
   
   tx.eth_type = 0x800;
   tx.eth_len = 0;
   tx.eth_payload[0] = '\0';
   tx.eth_payload_s = 0;
   tx.padding = 0;

   // Reset CDP parameters for TX:
   tx.cdp_sum  = 0;
   tx.cdp_version = 0;
   tx.cdp_ttl = 0;
   tx.cdp_payload[0] = '\0';
   tx.cdp_payload_s = 0;
   tx.cdp_tlv_id[0] = '\0';
   tx.cdp_tlv_id_len = 0;
   
   // Reset 802.1Q parameters of TX:
   tx.dot1Q=0;           
   tx.dot1Q_txt[0] = '\0';

   // ASCII Payload:
   tx.ascii = 0;                       // 1 if specified
   tx.ascii_payload[0]= '\0';

   // HEX Payload:
   tx.hex_payload_s = 0;
   
   // Reset MPLS parameters of TX:
   tx.mpls = 0;
   tx.mpls_txt[0] = '\0';
   tx.mpls_label = 0;
   tx.mpls_exp = 0;
   tx.mpls_bos = 1;
   tx.mpls_ttl = 255;
   tx.mpls_verbose_string[0] = '\0';
   
   // Reset IP parameters of TX:
   tx.ip_src_txt[0] = '\0';
   tx.ip_src_rand = 0;
   tx.ip_dst_txt[0] = '\0';
   tx.ip_src_isrange = 0;
   tx.ip_src_start = 0;
   tx.ip_src_stop = 0;
   memset(&tx.ip6_src_start, 0, sizeof(tx.ip6_src_start));
   memset(&tx.ip6_src_stop, 0, sizeof(tx.ip6_src_stop));
   
   tx.ip_dst_start = 0;
   tx.ip_dst_stop = 0;   
   memset(&tx.ip6_dst_start, 0, sizeof(tx.ip6_dst_start));
   memset(&tx.ip6_dst_stop, 0, sizeof(tx.ip6_dst_stop));
   tx.ip_dst_isrange = 0;

   tx.ip_ttl = 0;
   tx.ip_len = 0;
   tx.ip_payload[0]= '\0';
   tx.ip_payload_s = 0;
   tx.ip_option[0]= '\0';
   tx.ip_option_s = 0;

   // Reset ICMP parameters:
   tx.icmp_type=0;
   tx.icmp_code=0;
   tx.icmp_chksum=0;            // 0=autofill
   tx.icmp_ident=0x42;
   tx.icmp_sqnr=0x1;
   tx.icmp_payload_s=0;
   
   // Reset general L4 parameters:
   tx.sp = 0;
   tx.dp = 0;
   tx.sp_start = 0; 
   tx.sp_stop = 0;
   tx.dp_start = 0;
   tx.dp_stop = 0;
   tx.sp_isrange = 0;
   tx.dp_isrange = 0;

   // Reset UDP parameters of TX:
   
   tx.udp_len = 0;                    // If set to zero then create_udp_packet will calculate it
   tx.udp_sum = 0;
   tx.udp_payload[0] = '\0';
   tx.udp_payload_s = 0;
   
   // Reset TCP parameters of TX:

   tx.tcp_seq = 42;
   tx.tcp_seq_stop = 42;
   tx.tcp_seq_delta = 0;              // also used as 'isrange' meaning
   tx.tcp_ack = 42;
   tx.tcp_control = 0;
   tx.tcp_win = 10000;
   tx.tcp_sum = 0;
   tx.tcp_urg = 0;
   tx.tcp_len = 20;                   // Least size (TCP header only)
   tx.tcp_payload[0] = '\0';
   tx.tcp_payload_s = 0;

   // Reset RTP parameters of TX:
   tx.rtp_sqnr = 0;
   tx.rtp_stmp = 0;
   
   // Initialize random generator
   time(&t);
   srand((unsigned int)t);
   srand48(t);

   // Reset device_list
   for (i=0; i<MZ_MAX_DEVICES; i++) {
	   device_list[i].arprx_thread = 0;
	   device_list[i].p_arp = NULL;
	   device_list[i].arp_table = NULL;
	   device_list[i].ps=-1;
	   device_list[i].cli=0;
	   device_list[i].mgmt_only=0;
   }

   return 0;
}

static void print_packet_types(void)
{
	fprintf(stderr, "\n"
	    MAUSEZAHN_VERSION
	    "\n"
	    "|  The following packet types are currently implemented:\n"
	    "|\n"
	    "|  arp            ... sends ARP packets\n"
	    "|  bpdu           ... sends BPDU packets (STP or PVST+)\n"
	    "|  cdp            ... sends CDP messages\n"
	    "|  ip             ... sends IPv4 packets\n"
	    "|  udp            ... sends UDP datagrams\n"
	    "|  tcp            ... sends TCP segments\n"
	    "|  icmp           ... sends ICMP messages\n"
	    "|  igmp           ... sends IGMP messages\n"
	    "|  dns            ... sends DNS messages\n"
	    "|  rtp            ... sends RTP datagrams\n"
	    "|  syslog         ... sends Syslog messages\n"
	    "|\n"
	    "| Of course you can build any other packet type 'manually' using the direct layer 2 mode.\n"
	    "| FYI: The interactive mode supports additional protocols. (Try mz -x <port>)\n"
	    "\n");

	die();
}

// Purpose: Properly handle arguments and configure global structs (tx)
int getopts (int argc, char *argv[])
{
	int i, c, rargs, RX=0, count_set=0, delay_set=0;
	unsigned int time_factor;
	char *packet_type=NULL, *mops_type=NULL;
	char *dum;
	unsigned char *dum1, *dum2;
	bool do_help = false;

	libnet_t       *l;
	char err_buf[LIBNET_ERRBUF_SIZE];
	struct libnet_ether_addr *mymac;

	FILE *afp;
	char hexpld[MAX_PAYLOAD_SIZE*2];
	int hexpld_specified=0;
	long delay;
	char unit;

	opterr = 1; // let getopt print error message if necessary


	while ((c = getopt(argc, argv, short_options)) != -1)
		switch (c) {
		 case '4':
			tx.eth_type = 0x0800;
			ipv6_mode=0;
			break;
		 case '6':
			tx.eth_type = 0x86dd;
			ipv6_mode=1;
			break;
		 case 'h':
			help();
			break;
		 case 'q':
			quiet=1;
			break;
		 case 'v':
			version();
			break;
		 case 'V':
			verbose++;
			break;
		 case 'S':
			simulate=1;
			break;
		 case 'x':
			mz_port = MZ_DEFAULT_PORT;
			break;
		 case 'l':
			strncpy (mz_listen_addr, optarg, sizeof(mz_listen_addr));
			break;
		 case 'a':
			strncpy (tx.eth_src_txt, optarg, 32);
			tx.packet_mode = 0;
			break;
		 case 'A':
			strncpy (tx.ip_src_txt, optarg, sizeof(tx.ip_src_txt));
			break;
		 case 'b':
			strncpy (tx.eth_dst_txt, optarg, 32);
			tx.packet_mode = 0;
			break;
		 case 'B':
			strncpy (tx.ip_dst_txt, optarg, sizeof(tx.ip_dst_txt));
			break;
		 case 'c':
			errno=0;
			tx.count = strtol(optarg, (char **)NULL, 10);
			if ((errno == ERANGE && (tx.count == LONG_MAX || tx.count == LONG_MIN))
			    || (errno != 0 && tx.count == 0)) {
				perror("strtol");
				return (-1);
			}
			if (tx.count<0) tx.count=1;	  //TODO: Allow count=0 which means infinity (need to update all send_functions)
			count_set=1;
			break;
		 case 'd': 
			errno=0;
			time_factor=0;
			delay=0;
			unit='u'; // default is usecs
			if (sscanf(optarg, "%ld%c", &delay, &unit) == EOF) {
				perror("sscanf");
				return (-1);
			}
			if (delay < 0) {
				fprintf(stderr, " Incorrect delay format\n");
				return(-1);
			}
			if (unit == 's') time_factor=1000000;      // seconds
			else if (unit == 'm') time_factor=1000;    // msecs
			else if (unit == 'u') time_factor=1;       // usecs
			else {
				fprintf(stderr, " Incorrect delay format\n");
				return(-1);
			}
			tx.delay = delay * time_factor;
			if ((errno == ERANGE && (tx.delay == LONG_MAX || tx.delay == LONG_MIN))
			    || (errno != 0 && tx.delay == 0)) {
				perror("strtol");
				return (-1);
			}
			if (tx.delay<0) tx.delay=0; // no delay
			delay_set=1;
			break;
		 case 'p':
			errno=0;
			tx.padding = strtol(optarg, (char **)NULL, 10);
			if ((errno == ERANGE && (tx.padding == LONG_MAX || tx.padding == LONG_MIN))
			    || (errno != 0 && tx.padding == 0))  {
				perror("strtol");
				return (-1);
			}
			if (tx.padding>10000) {
				fprintf(stderr, " Warning: Padding must not exceed 10000!\n");
				return -1;
			}
			break;
		 case 't':
			packet_type = optarg; // analyzed below
			if (strcmp(packet_type,"help") == 0)
				print_packet_types();
			break;
		 case 'X':
			mops_type = optarg; // MOPS TRANSITION STRATEGY -- analyzed below
			break;
		 case 'T':
			packet_type = optarg;
			RX = 1;
			break;
		 case 'r':
			mz_rand = 1;
			break;
		 case 'M':
			if (strncmp(optarg,"help",4)==0) {
				(void) get_mpls_params("help ");
			}
			else {	
				strncpy (tx.mpls_txt, optarg, 128);
				tx.eth_type = ETHERTYPE_MPLS;
				tx.packet_mode = 0;
				tx.mpls=1;
			}
			break;
		 case 'P':  // ASCII payload
			strncpy((char*)tx.ascii_payload,  optarg, MAX_PAYLOAD_SIZE);
			tx.ascii = 1;
			break;
		 case 'f': // ASCII payload in FILE
			afp = fopen(optarg, "r");
			if (!afp) {
				fprintf(stderr, " mz/getopts: Can not open file %s. %s!\n", optarg, strerror(errno));
				return -1;
			}
			if (fgets((char*)tx.ascii_payload, MAX_PAYLOAD_SIZE, afp) == NULL)
				fprintf(stderr, " mz/getopts: File empty?\n");
			fclose(afp);
			tx.ascii = 1;
			break;
		 case 'F': // HEX payload in FILE
			afp = fopen(optarg, "r");
			if (!afp) {
				fprintf(stderr, " mz/getopts: Can not open file %s. %s!\n", optarg, strerror(errno));
				return -1;
			}
			i=0;
			while ( (hexpld[i]=fgetc(afp))!=EOF ) {
				if (isspace(hexpld[i])) {
					hexpld[i]=':';
				}
				i++;
			}
			hexpld[i]='\0';
			fclose(afp);
			hexpld_specified=1;
			break;
		 case 'Q': // VLAN TAG
			if (strncmp(optarg,"help",4)==0) { 
				print_dot1Q_help(); // ugly but most simple and safe solution
			}
			else {
				strncpy (tx.dot1Q_txt, optarg, 32);
				tx.dot1Q=1;
				// determine number of VLAN tags
				for (i=0; i<strlen(tx.dot1Q_txt); i++) {
					if (tx.dot1Q_txt[i]==',') tx.dot1Q++; 
				}
				tx.packet_mode = 0;
			}
			break;
		 case '?':
			if ((optopt == 'a') || (optopt == 'b') || (optopt = 'c') ||
			    (optopt == 'd') || (optopt == 'f') || (optopt = 'p') ||
			    (optopt == 't') || (optopt == 'm'))
				fprintf (stderr, " mz/getopts: Option -%c requires an argument.\n", optopt);
			else if (isprint (optopt))
				fprintf (stderr, " mz/getopts: Unknown option -%c'.\n", optopt);
			else
				fprintf (stderr, " mz/getopts: Unknown option character \\x%x'.\n", optopt);
			return 1;
		 default:
			fprintf (stderr," mz/getopts: Could not handle arguments properly!\n");
			return 1;
		}
   
	// ********************************************
	//       Handle additional arguments
	// ********************************************
	// 
	// Greeting text
	if (verbose) {
		fprintf(stderr,"\n"
			MAUSEZAHN_VERSION
			"\n"
			"Use at your own risk and responsibility!\n"
			"-- Verbose mode --\n"
			"\n");
	}
   
	if (argc<2) {
		help();
	}
   
	if ((rargs=argc-optind)>2) {  // number of remaining arguments
		fprintf(stderr," mz/getopts: Too many arguments!\n");
		return -1;
	}

   
	// There can be 0-2 additional arguments
	switch (rargs) {
	 case 0: 
		if (lookupdev()) { // no device found
			if (verbose) fprintf(stderr, " mz: no active interfaces found!\n");
			strcpy(tx.device, "lo");
		}
		break;
	 case 1: // arg_string OR device given => find out!
		if (__device_ifindex(argv[optind]) > 0) {
			strncpy(tx.device, argv[optind], 16);
		}
		else { /// arg_string given => no device has been specified -- let's find one!
			strncpy (tx.arg_string, argv[optind], MAX_PAYLOAD_SIZE);
			do_help = !!getarg(tx.arg_string,"help", NULL);
			if (!do_help) {
				if (lookupdev()) {
					/* no device found */
					if (verbose)
						fprintf(stderr, " mz: no active interfaces found!\n");
					strcpy(tx.device, "lo");
				}
				if (verbose)
					fprintf(stderr," mz: device not given, will use %s\n",tx.device);
			}
		}
		break;
	 case 2: // both device and arg_string given
		strncpy (tx.device, argv[optind], 16);
		strncpy (tx.arg_string, argv[optind+1], MAX_PAYLOAD_SIZE);
		break;
	 default:
		fprintf(stderr," mz/getopts: Unknown argument problem!\n");
		return 1;
	}

	if (hexpld_specified) {
		strcat(tx.arg_string, ",p=");
		strcat(tx.arg_string, hexpld);
	}

   
	//////////////////////////////////////////////////////////////////////////
	//
	// Initialize MAC and IP Addresses.
	// 
	// - tx.eth_src = own interface MAC 
	// - tx.ip_src  = own interface IP or user specified 
	// - tx.ip_dst  = 255.255.255.255 or user specified (can be a range)
	// - tx.ip_src_rand ... is set if needed.
	// 
   
	// Get own device MAC address:
	// Don't open context if only a help text is requested
	if  (!do_help && getarg(tx.arg_string,"help", NULL) !=1) {
		l = libnet_init (LIBNET_LINK_ADV, tx.device, err_buf );
		if (l == NULL) {
			fprintf(stderr, " mz/getopts: libnet_init() failed (%s)", err_buf);
			return -1;
		}
		mymac = libnet_get_hwaddr(l);
		for (i=0; i<6; i++) {
			tx.eth_src[i] = mymac->ether_addr_octet[i];
			tx.eth_mac_own[i] = mymac->ether_addr_octet[i];
		}

		// Set source IP address:
		if (strlen(tx.ip_src_txt)) { // option -A has been specified
			if (mz_strcmp(tx.ip_src_txt, "bcast", 2)==0) {
				if (ipv6_mode) {
					fprintf(stderr, "Option -A does not support 'bcast' when in IPv6 mode.\n");
					return 1;
				}
				tx.ip_src = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
			} else if (strcmp(tx.ip_src_txt, "rand") == 0) {
				if (ipv6_mode) {
					fprintf(stderr, "Option -A does not support 'rand' when in IPv6 mode.\n");
					return 1;
				}
				tx.ip_src_rand = 1;
				tx.ip_src_h  = (u_int32_t) ( ((float) rand()/RAND_MAX)*0xE0000000); //this is 224.0.0.0
			}
			else if (
				(ipv6_mode && get_ip6_range_src(tx.ip_src_txt, l)) || // returns 1 when no range has been specified
				(!ipv6_mode && get_ip_range_src(tx.ip_src_txt))
				)
			{
				// name2addr{4,6} accepts a valid IP address or a FQDN:
				if (ipv6_mode) {
					tx.ip6_src = libnet_name2addr6(l, tx.ip_src_txt, LIBNET_RESOLVE);
					if (libnet_in6_is_error(tx.ip6_src)) {
						/* libnet_in6_is_error returns 1 for the valid IPv6 address
						* ffff:ffff:ffff:ffff:ffff:ffff. Use an additional inet_pton()
						* check to cover cases where this address is specified
						* as source
						*/
						struct in6_addr src_check;
						if (inet_pton(AF_INET6, tx.ip_src_txt, &src_check) != 1) {
							fprintf(stderr, "Failed to set source"
							" IPv6 address. Please check if"
							" source is set to a valid IPv6 address.\n");
							return 1;
						}
					}
				} else {
					tx.ip_src = libnet_name2addr4(l, tx.ip_src_txt, LIBNET_RESOLVE);
					if (tx.ip_src == -1) {
						/* libnet_name2addr4() returns -1 for the valid address 255.255.255.255.
						* Use an additional inet_pton() check to cover case where this address
						* is specified as source
						*/
						struct in_addr src_check;
						if (inet_pton(AF_INET, tx.ip_src_txt, &src_check) != 1) {
							fprintf(stderr, "Failed to set source"
								" IPv4 address. Please check if"
								" source is set to a valid IPv4 address.\n");
							return 1;
						}
					}
				}
			}
		} else {
			// no source IP specified: by default use own IP address
			if (ipv6_mode) {
				tx.ip6_src = libnet_get_ipaddr6(l);
				if (strncmp((char*)&tx.ip6_src,(char*)&in6addr_error, sizeof(in6addr_error))==0)
					printf("Failed to set source IPv6 address: %s", l->err_buf);
			}
			else
				tx.ip_src = libnet_get_ipaddr4(l);
		}

		// Set destination IP address:
		if (strlen(tx.ip_dst_txt)) {  // option -B has been specified
			if (mz_strcmp(tx.ip_dst_txt, "rand", 2)==0) {
				fprintf(stderr, "Option -B does not support random destination IP addresses currently.\n");
				return 1;
			}

			if (mz_strcmp(tx.ip_dst_txt, "bcast", 2)==0) {
				if (ipv6_mode) {
					fprintf(stderr, "Option -B does not support 'bcast' when in IPv6 mode.\n");
					return 1;
				}
				tx.ip_dst = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
			} else if (
				(ipv6_mode && get_ip6_range_dst(tx.ip_dst_txt, l)) || // returns 1 when no range has been specified
				(!ipv6_mode && get_ip_range_dst(tx.ip_dst_txt)))
			{
				// name2addr{4, 6} accepts a valid IP address or a FQDN:
				if (ipv6_mode) {
					tx.ip6_dst = libnet_name2addr6(l, tx.ip_dst_txt, LIBNET_RESOLVE);
					if (libnet_in6_is_error(tx.ip6_dst)) {
						/* libnet_in6_is_error returns 1 for the valid IPv6 address
						* ffff:ffff:ffff:ffff:ffff:ffff. Use an additional inet_pton()
						* check to cover cases where this address is specified
						* as destination
						*/
						struct in6_addr dst_check;
						if (inet_pton(AF_INET6, tx.ip_dst_txt, &dst_check) != 1) {
							fprintf(stderr, "Failed to set destination"
							" IPv6 address. Please check if"
							" source is set to a valid IPv6 address.\n");
							return 1;
						}
					}
				} else {
					tx.ip_dst = libnet_name2addr4(l, tx.ip_dst_txt, LIBNET_RESOLVE);
					if (tx.ip_dst == -1) {
						/* libnet_name2addr4() returns -1 for the valid address 255.255.255.255.
						* Use an additional inet_pton() check to cover case where this address
						* is specified as destination
						*/
						struct in_addr dst_check;
						if (inet_pton(AF_INET, tx.ip_dst_txt, &dst_check) != 1) {
							fprintf(stderr, "Failed to set destination"
								" IPv4 address. Please check if"
								" destination is set to a valid IPv4 address.\n");
								return 1;
						}
					}
				}

			}
		}
		else { // no destination IP specified: by default use broadcast
			if (ipv6_mode) {
				tx.ip6_dst = libnet_name2addr6 (l, "ff02::1", LIBNET_DONT_RESOLVE);
			} else {
				tx.ip_dst = libnet_name2addr4 (l, "255.255.255.255", LIBNET_DONT_RESOLVE);
			}
		}

		// Initialize tx.ip_src_h and tx.ip_dst_h which are used by 'print_frame_details()' 
		// in verbose mode. See 'modifications.c'.

		if (tx.ip_src_rand) { // ip_src_h already given, convert to ip_src
			dum1 = (unsigned char*) &tx.ip_src_h;
			dum2 = (unsigned char*) &tx.ip_src;
		}
		else { // ip_src already given, convert to ip_src_h
			if (ipv6_mode) {
				if (tx.ip_src_isrange) {
					tx.ip6_src = tx.ip6_src_start;
				}
			} else {
				dum1 = (unsigned char*) &tx.ip_src;
				dum2 = (unsigned char*) &tx.ip_src_h;
			}
		}

		if (ipv6_mode) {
			if (tx.ip_dst_isrange) {
				tx.ip6_dst = tx.ip6_dst_start;
			}
		} else {
			*dum2 = *(dum1+3);
			dum2++;
			*dum2 = *(dum1+2);
			dum2++;
			*dum2 = *(dum1+1);
			dum2++;
			*dum2 = *dum1;

			dum1 = (unsigned char*) &tx.ip_dst;
			dum2 = (unsigned char*) &tx.ip_dst_h;

			*dum2 = *(dum1+3);
			dum2++;
			*dum2 = *(dum1+2);
			dum2++;
			*dum2 = *(dum1+1);
			dum2++;
			*dum2 = *dum1;
		}

		libnet_destroy(l);
	}
   
	//
	// END OF ADDRESS INITIALIZATION
	// 
	//////////////////////////////////////////////////////////////////////////


	////// retrieve interface parameters ///////

	for (i=0; i<device_list_entries; i++) {
		get_dev_params(device_list[i].dev);
	}

   
	//////////////////////////////////////////////////////////////////////////
	// 
	//  Mausezahn CLI desired?
	if (mz_port) {
		// has port number been specified?
		if (strlen(tx.arg_string)) {
			mz_port = (int) str2int (tx.arg_string);
		}

		mz_cli_init();
		cli();
	}
   
	//////////////////////////////////////////////////////////////////////////
	//
	//                 Mode decision
	// 
	// Consider -t and -m option (used exclusively)
	//   -t => special packet types, stateless
	// 
	// If -t not present then evaluate arg_string which must 
	// contain a byte-string in hexadecimal notation.
	// 
	// 
   
	// ***** NEW: MOPS TRANSITION STRATEGY *****
	if (mops_type != NULL) {

		if (mz_strcmp(mops_type,"lldp",4)==0) {
			mops_direct(tx.device, MOPS_LLDP, tx.arg_string);
		}
	}


	if (packet_type == NULL) { // raw hex string given
		mode = BYTE_STREAM;
	}
	else if (strcmp(packet_type,"arp")==0) {
		mode = ARP;
	}
	else if (strcmp(packet_type,"bpdu")==0) {
		mode = BPDU;
	}
	else if (strcmp(packet_type,"ip")==0) {
		mode = IP;
	}
	else if (strcmp(packet_type,"udp")==0) {
		mode = UDP;
	}
	else if (strcmp(packet_type,"icmp")==0) {
		mode = ICMP;
	}
	else if (strcmp(packet_type,"icmp6")==0) {
		mode = ICMP6;
	}
	else if (strcmp(packet_type,"tcp")==0) {
		mode = TCP;
	}
	else if (strcmp(packet_type,"dns")==0) {
		mode = DNS;
	}
	else if (strcmp(packet_type,"cdp")==0) {
		mode = CDP;
	}
	else if (strcmp(packet_type,"syslog")==0) {
		mode = SYSLOG;
	}
	else if (strcmp(packet_type, "igmp") == 0) {
		mode = IGMP;
	}
	else if (strcmp(packet_type,"lldp")==0) {
		mode = LLDP;
		tx.packet_mode=0; // create whole frame by ourself
	}
	else if (strcmp(packet_type,"rtp")==0) {
		if (RX) {
			mode = RX_RTP;
		}
		else {
			mode = RTP;
			if (!count_set) tx.count = 0;  
			if (!delay_set) tx.delay = 20000; // 20 msec inter-packet delay for RTP
		}
	}
	else {
		fprintf(stderr, " mz: you must specify a valid packet type!\n");
	}

   
	//////////////////////////////////////////////////////////////////////////   
   
	// TODO: Implement macro support
	//       Check macro types here 
   
	return 0;
}

int main(int argc, char **argv)
{
   // These handles are only used when creating L3 and above packets.
   libnet_t             *l;               // the context 
   libnet_ptag_t         t2=0, t3=0, t4=0;      // handles to layers 
   double cpu_time_used;

   reset(); 
   
   if ( getopts(argc, argv) ) 
     {
	(void) fprintf(stderr, " Invalid command line parameters!\n");
	help();
     }

   // Check whether hires timers are supported or not:
   (void) check_timer();

	signal(SIGINT, signal_handler);  // to close all file pointers etc upon SIGINT

   switch (mode)
     {
      case BYTE_STREAM:
	send_eth();
	break;
	
      case ARP:
	(void) send_arp();
	break;
	
      case BPDU:
	(void) send_bpdu();
	break;
	
      case CDP:
	(void) send_cdp();
	break;
	
      case IP:                        // From now on a new much more modular method is used:
	l = get_link_context();
	t3 = create_ip_packet(l);     // t3 can be used for later header changes
	if (!quiet) complexity();
	if (tx.packet_mode==0)        // Ethernet manipulation features does NOT use ARP to determine eth_dst  
	  t2 = create_eth_frame(l, t3, t4);   // t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;
	
      case ICMP:
	tx.ip_proto = 1;  
	l = get_link_context();
	t4 = create_icmp_packet(l);    // t4 can be used for later header changes
	t3 = create_ip_packet(l);      // t3 can be used for later header changes
	if (!quiet) complexity();
	if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst  
	  t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;
	
      case ICMP6:
	tx.ip_proto = 58;
	l = get_link_context();
	t4 = create_icmp6_packet(l);	// t4 can be used for later header changes
	t3 = create_ip_packet(l);	// t3 can be used for later header changes
	if (!quiet) complexity();
	if (tx.packet_mode==0)		// Ethernet manipulation features does NOT use ARP to determine eth_dst
	  t2 = create_eth_frame(l, t3, t4);	// t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;

      case UDP:
	tx.ip_proto = 17;
	l = get_link_context();
	t4 = create_udp_packet(l);     // t4 can be used for later header changes
	t3 = create_ip_packet(l);      // t3 can be used for later header changes
	if (!quiet) complexity();
	if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst  
	  t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;

      case TCP:
	tx.ip_proto = 6;
	l = get_link_context();
	t4 = create_tcp_packet(l);     // t4 can be used for later header changes
	t3 = create_ip_packet(l);      // t3 can be used for later header changes
	if (!quiet) complexity();
	if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst  
	  t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;

      case IGMP:
	tx.ip_proto = 2;
	l = get_link_context();
	t4 = create_igmp_packet(l);
	/* t3 can be used for later header changes */
	t3 = create_ip_packet(l);
	if (!quiet)
		complexity();

	/* Ethernet manipulation features does NOT use ARP to determine eth_dst
	 * */
	if (tx.packet_mode == 0)
		t2 = create_eth_frame(l, t3, t4); // t2 can be used for later header changes
	else
		send_frame(l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;

      case DNS:
	tx.ip_proto = 17;
	l = get_link_context();
	(void) create_dns_packet();
	t4 = create_udp_packet(l);     // t4 can be used for later header changes
	t3 = create_ip_packet(l);      // t3 can be used for later header changes
	if (!quiet) complexity();
	if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst  
	  t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;
	
      case RTP:
	tx.ip_proto = 17;
	l = get_link_context();
	if (!quiet) fprintf(stderr, " mz: RTP mode! (count=%u, delay=%u usec)\n\n", tx.count, tx.delay);
	(void) create_rtp_packet();
	t4 = create_udp_packet(l);     // t4 can be used for later header changes
	t3 = create_ip_packet(l);      // t3 can be used for later header changes
	if (!quiet) complexity();
	if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst  
	  t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;
	
      case RX_RTP:  // Receive RTP packets
	rcv_rtp_init();
	rcv_rtp();
	break;

      case SYSLOG:
	tx.ip_proto = 17;
	l = get_link_context();
	(void) create_syslog_packet();
	t4 = create_udp_packet(l);     // t4 can be used for later header changes
	t3 = create_ip_packet(l);      // t3 can be used for later header changes
	if (!quiet) complexity();

	if (tx.packet_mode==0)         // Ethernet manipulation features does NOT use ARP to determine eth_dst  
	  t2 = create_eth_frame(l, t3, t4);    // t2 can be used for later header changes
	else
	  send_frame (l, t3, t4); // NOTE: send_frame also destroys context finaly
	break;

      case LLDP: // start with a new concept here
	//l = get_link_context();
	//(void) create_lldp_packet();
	// // // printf("SIZE=%lu\n",sizeof(struct tx_struct));
        fprintf(stderr, "LLDP is currently only supported via the interactive mode\n");
	     exit(1);
	break;

	
      default:
	(void) fprintf(stderr," mz/main: unknown mode! Stop.\n");
	return (1);
     }

   if (!quiet) 
     {
	mz_stop = clock();
	cpu_time_used = ((double) (mz_stop - mz_start)) / CLOCKS_PER_SEC;
	if (cpu_time_used > 0)
	  {
	     total_d /= cpu_time_used;
	     fprintf(stderr, "%.2f seconds (%.Lf packets per second)\n",cpu_time_used,total_d);
	  }
	else
	  {
	     fprintf(stderr, "\n");
	  }
     }
   
   return(0);
}