forked from the-tcpdump-group/tcpdump
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathprint-icmp6.c
2115 lines (1903 loc) · 63.8 KB
/
print-icmp6.c
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
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include <stdio.h>
#include <string.h>
#include "netdissect.h"
#include "addrtoname.h"
#include "addrtostr.h"
#include "extract.h"
#include "ip6.h"
#include "ipproto.h"
#include "udp.h"
#include "ah.h"
/* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */
/* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
struct icmp6_hdr {
nd_uint8_t icmp6_type; /* type field */
nd_uint8_t icmp6_code; /* code field */
nd_uint16_t icmp6_cksum; /* checksum field */
union {
nd_uint32_t icmp6_un_data32[1]; /* type-specific field */
nd_uint16_t icmp6_un_data16[2]; /* type-specific field */
nd_uint8_t icmp6_un_data8[4]; /* type-specific field */
nd_byte icmp6_un_data[1]; /* type-specific field */
} icmp6_dataun;
};
#define icmp6_data32 icmp6_dataun.icmp6_un_data32
#define icmp6_data16 icmp6_dataun.icmp6_un_data16
#define icmp6_data8 icmp6_dataun.icmp6_un_data8
#define icmp6_data icmp6_dataun.icmp6_un_data
#define icmp6_pptr icmp6_data32[0] /* parameter prob */
#define icmp6_mtu icmp6_data32[0] /* packet too big */
#define icmp6_id icmp6_data16[0] /* echo request/reply */
#define icmp6_seq icmp6_data16[1] /* echo request/reply */
#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
#define ICMP6_PARAM_PROB 4 /* ip6 header bad */
#define ICMP6_ECHO_REQUEST 128 /* echo service */
#define ICMP6_ECHO_REPLY 129 /* echo reply */
#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
#define MLD6_LISTENER_QUERY 130 /* multicast listener query */
#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
#define MLD6_LISTENER_REPORT 131 /* multicast listener report */
#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
#define MLD6_LISTENER_DONE 132 /* multicast listener done */
#define ND_ROUTER_SOLICIT 133 /* router solicitation */
#define ND_ROUTER_ADVERT 134 /* router advertisement */
#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
#define ND_REDIRECT 137 /* redirect */
#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
#define ICMP6_WRUREQUEST 139 /* who are you request */
#define ICMP6_WRUREPLY 140 /* who are you reply */
#define ICMP6_FQDN_QUERY 139 /* FQDN query */
#define ICMP6_FQDN_REPLY 140 /* FQDN reply */
#define ICMP6_NI_QUERY 139 /* node information request - RFC 4620 */
#define ICMP6_NI_REPLY 140 /* node information reply - RFC 4620 */
#define IND_SOLICIT 141 /* inverse neighbor solicitation */
#define IND_ADVERT 142 /* inverse neighbor advertisement */
#define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */
#define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */
#define ICMP6_HADISCOV_REQUEST 144
#define ICMP6_HADISCOV_REPLY 145
#define ICMP6_MOBILEPREFIX_SOLICIT 146
#define ICMP6_MOBILEPREFIX_ADVERT 147
#define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */
#define MLD6_MTRACE 201 /* mtrace messages */
#define ICMP6_MAXTYPE 201
#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
#define ICMP6_NI_REFUSED 1 /* node information request is refused */
#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
/* Used in kernel only */
#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
/*
* Multicast Listener Discovery
*/
struct mld6_hdr {
struct icmp6_hdr mld6_hdr;
nd_ipv6 mld6_addr; /* multicast address */
};
#define mld6_type mld6_hdr.icmp6_type
#define mld6_code mld6_hdr.icmp6_code
#define mld6_cksum mld6_hdr.icmp6_cksum
#define mld6_maxdelay mld6_hdr.icmp6_data16[0]
#define mld6_reserved mld6_hdr.icmp6_data16[1]
#define MLD_MINLEN 24
#define MLDV2_MINLEN 28
/*
* Neighbor Discovery
*/
struct nd_router_solicit { /* router solicitation */
struct icmp6_hdr nd_rs_hdr;
/* could be followed by options */
};
#define nd_rs_type nd_rs_hdr.icmp6_type
#define nd_rs_code nd_rs_hdr.icmp6_code
#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
struct nd_router_advert { /* router advertisement */
struct icmp6_hdr nd_ra_hdr;
nd_uint32_t nd_ra_reachable; /* reachable time */
nd_uint32_t nd_ra_retransmit; /* retransmit timer */
/* could be followed by options */
};
#define nd_ra_type nd_ra_hdr.icmp6_type
#define nd_ra_code nd_ra_hdr.icmp6_code
#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
#define ND_RA_FLAG_MANAGED 0x80
#define ND_RA_FLAG_OTHER 0x40
#define ND_RA_FLAG_HOME_AGENT 0x20
/*
* Router preference values based on draft-draves-ipngwg-router-selection-01.
* These are non-standard definitions.
*/
#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
struct nd_neighbor_solicit { /* neighbor solicitation */
struct icmp6_hdr nd_ns_hdr;
nd_ipv6 nd_ns_target; /*target address */
/* could be followed by options */
};
#define nd_ns_type nd_ns_hdr.icmp6_type
#define nd_ns_code nd_ns_hdr.icmp6_code
#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
struct nd_neighbor_advert { /* neighbor advertisement */
struct icmp6_hdr nd_na_hdr;
nd_ipv6 nd_na_target; /* target address */
/* could be followed by options */
};
#define nd_na_type nd_na_hdr.icmp6_type
#define nd_na_code nd_na_hdr.icmp6_code
#define nd_na_cksum nd_na_hdr.icmp6_cksum
#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
#define ND_NA_FLAG_ROUTER 0x80000000
#define ND_NA_FLAG_SOLICITED 0x40000000
#define ND_NA_FLAG_OVERRIDE 0x20000000
struct nd_redirect { /* redirect */
struct icmp6_hdr nd_rd_hdr;
nd_ipv6 nd_rd_target; /* target address */
nd_ipv6 nd_rd_dst; /* destination address */
/* could be followed by options */
};
#define nd_rd_type nd_rd_hdr.icmp6_type
#define nd_rd_code nd_rd_hdr.icmp6_code
#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
struct nd_opt_hdr { /* Neighbor discovery option header */
nd_uint8_t nd_opt_type;
nd_uint8_t nd_opt_len;
/* followed by option specific data*/
};
#define ND_OPT_SOURCE_LINKADDR 1
#define ND_OPT_TARGET_LINKADDR 2
#define ND_OPT_PREFIX_INFORMATION 3
#define ND_OPT_REDIRECTED_HEADER 4
#define ND_OPT_MTU 5
#define ND_OPT_ADVINTERVAL 7
#define ND_OPT_HOMEAGENT_INFO 8
#define ND_OPT_ROUTE_INFO 24 /* RFC4191 */
#define ND_OPT_RDNSS 25
#define ND_OPT_DNSSL 31
struct nd_opt_prefix_info { /* prefix information */
nd_uint8_t nd_opt_pi_type;
nd_uint8_t nd_opt_pi_len;
nd_uint8_t nd_opt_pi_prefix_len;
nd_uint8_t nd_opt_pi_flags_reserved;
nd_uint32_t nd_opt_pi_valid_time;
nd_uint32_t nd_opt_pi_preferred_time;
nd_uint32_t nd_opt_pi_reserved2;
nd_ipv6 nd_opt_pi_prefix;
};
#define ND_OPT_PI_FLAG_ONLINK 0x80
#define ND_OPT_PI_FLAG_AUTO 0x40
#define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/
struct nd_opt_rd_hdr { /* redirected header */
nd_uint8_t nd_opt_rh_type;
nd_uint8_t nd_opt_rh_len;
nd_uint16_t nd_opt_rh_reserved1;
nd_uint32_t nd_opt_rh_reserved2;
/* followed by IP header and data */
};
struct nd_opt_mtu { /* MTU option */
nd_uint8_t nd_opt_mtu_type;
nd_uint8_t nd_opt_mtu_len;
nd_uint16_t nd_opt_mtu_reserved;
nd_uint32_t nd_opt_mtu_mtu;
};
struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
nd_uint8_t nd_opt_rdnss_type;
nd_uint8_t nd_opt_rdnss_len;
nd_uint16_t nd_opt_rdnss_reserved;
nd_uint32_t nd_opt_rdnss_lifetime;
nd_ipv6 nd_opt_rdnss_addr[1]; /* variable-length */
};
struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */
nd_uint8_t nd_opt_dnssl_type;
nd_uint8_t nd_opt_dnssl_len;
nd_uint16_t nd_opt_dnssl_reserved;
nd_uint32_t nd_opt_dnssl_lifetime;
/* followed by list of DNS search domains, variable-length */
};
struct nd_opt_advinterval { /* Advertisement interval option */
nd_uint8_t nd_opt_adv_type;
nd_uint8_t nd_opt_adv_len;
nd_uint16_t nd_opt_adv_reserved;
nd_uint32_t nd_opt_adv_interval;
};
struct nd_opt_homeagent_info { /* Home Agent info */
nd_uint8_t nd_opt_hai_type;
nd_uint8_t nd_opt_hai_len;
nd_uint16_t nd_opt_hai_reserved;
nd_uint16_t nd_opt_hai_preference;
nd_uint16_t nd_opt_hai_lifetime;
};
struct nd_opt_route_info { /* route info */
nd_uint8_t nd_opt_rti_type;
nd_uint8_t nd_opt_rti_len;
nd_uint8_t nd_opt_rti_prefixlen;
nd_uint8_t nd_opt_rti_flags;
nd_uint32_t nd_opt_rti_lifetime;
/* prefix follows */
};
/*
* icmp6 namelookup
*/
struct icmp6_namelookup {
struct icmp6_hdr icmp6_nl_hdr;
nd_byte icmp6_nl_nonce[8];
nd_int32_t icmp6_nl_ttl;
#if 0
nd_uint8_t icmp6_nl_len;
nd_byte icmp6_nl_name[3];
#endif
/* could be followed by options */
};
/*
* icmp6 node information
*/
struct icmp6_nodeinfo {
struct icmp6_hdr icmp6_ni_hdr;
nd_byte icmp6_ni_nonce[8];
/* could be followed by reply data */
};
#define ni_type icmp6_ni_hdr.icmp6_type
#define ni_code icmp6_ni_hdr.icmp6_code
#define ni_cksum icmp6_ni_hdr.icmp6_cksum
#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
#define NI_QTYPE_NOOP 0 /* NOOP */
#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes (drafts up to 09) */
#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
#define NI_QTYPE_DNSNAME 2 /* DNS Name */
#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
/* network endian */
#define NI_SUPTYPE_FLAG_COMPRESS ((uint16_t)htons(0x1))
#define NI_FQDN_FLAG_VALIDTTL ((uint16_t)htons(0x1))
/* network endian */
#define NI_NODEADDR_FLAG_TRUNCATE ((uint16_t)htons(0x1))
#define NI_NODEADDR_FLAG_ALL ((uint16_t)htons(0x2))
#define NI_NODEADDR_FLAG_COMPAT ((uint16_t)htons(0x4))
#define NI_NODEADDR_FLAG_LINKLOCAL ((uint16_t)htons(0x8))
#define NI_NODEADDR_FLAG_SITELOCAL ((uint16_t)htons(0x10))
#define NI_NODEADDR_FLAG_GLOBAL ((uint16_t)htons(0x20))
#define NI_NODEADDR_FLAG_ANYCAST ((uint16_t)htons(0x40)) /* just experimental. not in spec */
struct ni_reply_fqdn {
nd_uint32_t ni_fqdn_ttl; /* TTL */
nd_uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */
nd_byte ni_fqdn_name[3]; /* XXX: alignment */
};
/*
* Router Renumbering. as router-renum-08.txt
*/
struct icmp6_router_renum { /* router renumbering header */
struct icmp6_hdr rr_hdr;
nd_uint8_t rr_segnum;
nd_uint8_t rr_flags;
nd_uint16_t rr_maxdelay;
nd_uint32_t rr_reserved;
};
#define ICMP6_RR_FLAGS_TEST 0x80
#define ICMP6_RR_FLAGS_REQRESULT 0x40
#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
#define ICMP6_RR_FLAGS_SPECSITE 0x10
#define ICMP6_RR_FLAGS_PREVDONE 0x08
#define rr_type rr_hdr.icmp6_type
#define rr_code rr_hdr.icmp6_code
#define rr_cksum rr_hdr.icmp6_cksum
#define rr_seqnum rr_hdr.icmp6_data32[0]
struct rr_pco_match { /* match prefix part */
nd_uint8_t rpm_code;
nd_uint8_t rpm_len;
nd_uint8_t rpm_ordinal;
nd_uint8_t rpm_matchlen;
nd_uint8_t rpm_minlen;
nd_uint8_t rpm_maxlen;
nd_uint16_t rpm_reserved;
nd_ipv6 rpm_prefix;
};
#define RPM_PCO_ADD 1
#define RPM_PCO_CHANGE 2
#define RPM_PCO_SETGLOBAL 3
#define RPM_PCO_MAX 4
struct rr_pco_use { /* use prefix part */
nd_uint8_t rpu_uselen;
nd_uint8_t rpu_keeplen;
nd_uint8_t rpu_ramask;
nd_uint8_t rpu_raflags;
nd_uint32_t rpu_vltime;
nd_uint32_t rpu_pltime;
nd_uint32_t rpu_flags;
nd_ipv6 rpu_prefix;
};
#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
/* network endian */
#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((uint32_t)htonl(0x80000000))
#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((uint32_t)htonl(0x40000000))
struct rr_result { /* router renumbering result message */
nd_uint16_t rrr_flags;
nd_uint8_t rrr_ordinal;
nd_uint8_t rrr_matchedlen;
nd_uint32_t rrr_ifid;
nd_ipv6 rrr_prefix;
};
/* network endian */
#define ICMP6_RR_RESULT_FLAGS_OOB ((uint16_t)htons(0x0002))
#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((uint16_t)htons(0x0001))
static const char *get_rtpref(u_int);
static const char *get_lifetime(uint32_t);
static void print_lladdr(netdissect_options *ndo, const u_char *, size_t);
static void icmp6_opt_print(netdissect_options *ndo, const u_char *, int);
static void mld6_print(netdissect_options *ndo, const u_char *);
static void mldv2_report_print(netdissect_options *ndo, const u_char *, u_int);
static void mldv2_query_print(netdissect_options *ndo, const u_char *, u_int);
static const struct udphdr *get_upperlayer(netdissect_options *ndo, const u_char *, u_int *);
static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char *);
static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
#ifndef abs
#define abs(a) ((0 < (a)) ? (a) : -(a))
#endif
/*
* DIO: Updated to RFC6550, as published in 2012: section 6. (page 30)
*/
#define ND_RPL_MESSAGE 155 /* 0x9B */
enum ND_RPL_CODE {
ND_RPL_DAG_IS=0x00,
ND_RPL_DAG_IO=0x01,
ND_RPL_DAO =0x02,
ND_RPL_DAO_ACK=0x03,
ND_RPL_SEC_DAG_IS = 0x80,
ND_RPL_SEC_DAG_IO = 0x81,
ND_RPL_SEC_DAG = 0x82,
ND_RPL_SEC_DAG_ACK= 0x83,
ND_RPL_SEC_CONSIST= 0x8A
};
enum ND_RPL_DIO_FLAGS {
ND_RPL_DIO_GROUNDED = 0x80,
ND_RPL_DIO_DATRIG = 0x40,
ND_RPL_DIO_DASUPPORT= 0x20,
ND_RPL_DIO_RES4 = 0x10,
ND_RPL_DIO_RES3 = 0x08,
ND_RPL_DIO_PRF_MASK = 0x07 /* 3-bit preference */
};
#define DAGID_LEN 16
/* section 6 of draft-ietf-roll-rpl-19 */
struct nd_rpl_security {
nd_uint8_t rpl_sec_t_reserved; /* bit 7 is T-bit */
nd_uint8_t rpl_sec_algo;
nd_uint16_t rpl_sec_kim_lvl_flags; /* bit 15/14, KIM */
/* bit 10-8, LVL, bit 7-0 flags */
nd_uint32_t rpl_sec_counter;
#if 0
nd_byte rpl_sec_ki[0]; /* depends upon kim */
#endif
};
/* section 6.2.1, DODAG Information Solication (DIS_IS) */
struct nd_rpl_dis_is {
nd_uint8_t rpl_dis_flags;
nd_uint8_t rpl_dis_reserved;
#if 0
nd_byte rpl_dis_options[0];
#endif
};
/* section 6.3.1, DODAG Information Object (DIO) */
struct nd_rpl_dio {
nd_uint8_t rpl_instanceid;
nd_uint8_t rpl_version;
nd_uint16_t rpl_dagrank;
nd_uint8_t rpl_mopprf; /* bit 7=G, 5-3=MOP, 2-0=PRF */
nd_uint8_t rpl_dtsn; /* Dest. Advertisement Trigger Sequence Number */
nd_uint8_t rpl_flags; /* no flags defined yet */
nd_uint8_t rpl_resv1;
nd_byte rpl_dagid[DAGID_LEN];
};
#define RPL_DIO_GROUND_FLAG 0x80
#define RPL_DIO_MOP_SHIFT 3
#define RPL_DIO_MOP_MASK (7 << RPL_DIO_MOP_SHIFT)
#define RPL_DIO_PRF_SHIFT 0
#define RPL_DIO_PRF_MASK (7 << RPL_DIO_PRF_SHIFT)
#define RPL_DIO_GROUNDED(X) ((X)&RPL_DIO_GROUND_FLAG)
#define RPL_DIO_MOP(X) (enum RPL_DIO_MOP)(((X)&RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT)
#define RPL_DIO_PRF(X) (((X)&RPL_DIO_PRF_MASK) >> RPL_DIO_PRF_SHIFT)
enum RPL_DIO_MOP {
RPL_DIO_NONSTORING= 0x0,
RPL_DIO_STORING = 0x1,
RPL_DIO_NONSTORING_MULTICAST = 0x2,
RPL_DIO_STORING_MULTICAST = 0x3
};
enum RPL_SUBOPT {
RPL_OPT_PAD1 = 0,
RPL_OPT_PADN = 1,
RPL_DIO_METRICS = 2,
RPL_DIO_ROUTINGINFO = 3,
RPL_DIO_CONFIG = 4,
RPL_DAO_RPLTARGET = 5,
RPL_DAO_TRANSITINFO = 6,
RPL_DIO_DESTPREFIX = 8,
RPL_DAO_RPLTARGET_DESC=9
};
struct rpl_genoption {
nd_uint8_t rpl_dio_type;
nd_uint8_t rpl_dio_len; /* suboption length, not including type/len */
};
#define RPL_GENOPTION_LEN 2
#define RPL_DIO_LIFETIME_INFINITE 0xffffffff
#define RPL_DIO_LIFETIME_DISCONNECT 0
struct rpl_dio_destprefix {
nd_uint8_t rpl_dio_type;
nd_uint8_t rpl_dio_len;
nd_uint8_t rpl_dio_prefixlen; /* in bits */
nd_uint8_t rpl_dio_prf; /* flags, including Route Preference */
nd_uint32_t rpl_dio_prefixlifetime; /* in seconds */
#if 0
nd_byte rpl_dio_prefix[0]; /* variable number of bytes */
#endif
};
/* section 6.4.1, DODAG Information Object (DIO) */
struct nd_rpl_dao {
nd_uint8_t rpl_instanceid;
nd_uint8_t rpl_flags; /* bit 7=K, 6=D */
nd_uint8_t rpl_resv;
nd_uint8_t rpl_daoseq;
nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
};
#define ND_RPL_DAO_MIN_LEN 4 /* length without DAGID */
/* indicates if this DAO is to be acK'ed */
#define RPL_DAO_K_SHIFT 7
#define RPL_DAO_K_MASK (1 << RPL_DAO_K_SHIFT)
#define RPL_DAO_K(X) (((X)&RPL_DAO_K_MASK) >> RPL_DAO_K_SHIFT)
/* indicates if the DAGID is present */
#define RPL_DAO_D_SHIFT 6
#define RPL_DAO_D_MASK (1 << RPL_DAO_D_SHIFT)
#define RPL_DAO_D(X) (((X)&RPL_DAO_D_MASK) >> RPL_DAO_D_SHIFT)
struct rpl_dao_target {
nd_uint8_t rpl_dao_type;
nd_uint8_t rpl_dao_len;
nd_uint8_t rpl_dao_flags; /* unused */
nd_uint8_t rpl_dao_prefixlen; /* in bits */
#if 0
nd_byte rpl_dao_prefix[0]; /* variable number of bytes */
#endif
};
/* section 6.5.1, Destination Advertisement Object Acknowledgement (DAO-ACK) */
struct nd_rpl_daoack {
nd_uint8_t rpl_instanceid;
nd_uint8_t rpl_flags; /* bit 7=D */
nd_uint8_t rpl_daoseq;
nd_uint8_t rpl_status;
nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
};
#define ND_RPL_DAOACK_MIN_LEN 4 /* length without DAGID */
/* indicates if the DAGID is present */
#define RPL_DAOACK_D_SHIFT 7
#define RPL_DAOACK_D_MASK (1 << RPL_DAOACK_D_SHIFT)
#define RPL_DAOACK_D(X) (((X)&RPL_DAOACK_D_MASK) >> RPL_DAOACK_D_SHIFT)
static const struct tok icmp6_type_values[] = {
{ ICMP6_DST_UNREACH, "destination unreachable"},
{ ICMP6_PACKET_TOO_BIG, "packet too big"},
{ ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
{ ICMP6_PARAM_PROB, "parameter problem"},
{ ICMP6_ECHO_REQUEST, "echo request"},
{ ICMP6_ECHO_REPLY, "echo reply"},
{ MLD6_LISTENER_QUERY, "multicast listener query"},
{ MLD6_LISTENER_REPORT, "multicast listener report"},
{ MLD6_LISTENER_DONE, "multicast listener done"},
{ ND_ROUTER_SOLICIT, "router solicitation"},
{ ND_ROUTER_ADVERT, "router advertisement"},
{ ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
{ ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
{ ND_REDIRECT, "redirect"},
{ ICMP6_ROUTER_RENUMBERING, "router renumbering"},
{ IND_SOLICIT, "inverse neighbor solicitation"},
{ IND_ADVERT, "inverse neighbor advertisement"},
{ MLDV2_LISTENER_REPORT, "multicast listener report v2"},
{ ICMP6_HADISCOV_REQUEST, "ha discovery request"},
{ ICMP6_HADISCOV_REPLY, "ha discovery reply"},
{ ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
{ ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
{ ICMP6_WRUREQUEST, "who-are-you request"},
{ ICMP6_WRUREPLY, "who-are-you reply"},
{ ICMP6_NI_QUERY, "node information query"},
{ ICMP6_NI_REPLY, "node information reply"},
{ MLD6_MTRACE, "mtrace message"},
{ MLD6_MTRACE_RESP, "mtrace response"},
{ ND_RPL_MESSAGE, "RPL"},
{ 0, NULL }
};
static const struct tok icmp6_dst_unreach_code_values[] = {
{ ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
{ ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
{ ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
{ ICMP6_DST_UNREACH_ADDR, "unreachable address"},
{ ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
{ 0, NULL }
};
static const struct tok icmp6_opt_pi_flag_values[] = {
{ ND_OPT_PI_FLAG_ONLINK, "onlink" },
{ ND_OPT_PI_FLAG_AUTO, "auto" },
{ ND_OPT_PI_FLAG_ROUTER, "router" },
{ 0, NULL }
};
static const struct tok icmp6_opt_ra_flag_values[] = {
{ ND_RA_FLAG_MANAGED, "managed" },
{ ND_RA_FLAG_OTHER, "other stateful"},
{ ND_RA_FLAG_HOME_AGENT, "home agent"},
{ 0, NULL }
};
static const struct tok icmp6_nd_na_flag_values[] = {
{ ND_NA_FLAG_ROUTER, "router" },
{ ND_NA_FLAG_SOLICITED, "solicited" },
{ ND_NA_FLAG_OVERRIDE, "override" },
{ 0, NULL }
};
static const struct tok icmp6_opt_values[] = {
{ ND_OPT_SOURCE_LINKADDR, "source link-address"},
{ ND_OPT_TARGET_LINKADDR, "destination link-address"},
{ ND_OPT_PREFIX_INFORMATION, "prefix info"},
{ ND_OPT_REDIRECTED_HEADER, "redirected header"},
{ ND_OPT_MTU, "mtu"},
{ ND_OPT_RDNSS, "rdnss"},
{ ND_OPT_DNSSL, "dnssl"},
{ ND_OPT_ADVINTERVAL, "advertisement interval"},
{ ND_OPT_HOMEAGENT_INFO, "homeagent information"},
{ ND_OPT_ROUTE_INFO, "route info"},
{ 0, NULL }
};
/* mldv2 report types */
static const struct tok mldv2report2str[] = {
{ 1, "is_in" },
{ 2, "is_ex" },
{ 3, "to_in" },
{ 4, "to_ex" },
{ 5, "allow" },
{ 6, "block" },
{ 0, NULL }
};
static const char *
get_rtpref(u_int v)
{
static const char *rtpref_str[] = {
"medium", /* 00 */
"high", /* 01 */
"rsv", /* 10 */
"low" /* 11 */
};
return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
}
static const char *
get_lifetime(uint32_t v)
{
static char buf[20];
if (v == (uint32_t)~0UL)
return "infinity";
else {
nd_snprintf(buf, sizeof(buf), "%us", v);
return buf;
}
}
static void
print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l)
{
const uint8_t *ep, *q;
q = p;
ep = p + l;
while (l > 0 && q < ep) {
if (q > p)
ND_PRINT(":");
ND_PRINT("%02x", EXTRACT_U_1(q));
q++;
l--;
}
}
static int icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
const struct icmp6_hdr *icp, u_int len)
{
return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
IPPROTO_ICMPV6);
}
static const struct tok rpl_mop_values[] = {
{ RPL_DIO_NONSTORING, "nonstoring"},
{ RPL_DIO_STORING, "storing"},
{ RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"},
{ RPL_DIO_STORING_MULTICAST, "storing-multicast"},
{ 0, NULL},
};
static const struct tok rpl_subopt_values[] = {
{ RPL_OPT_PAD1, "pad1"},
{ RPL_OPT_PADN, "padN"},
{ RPL_DIO_METRICS, "metrics"},
{ RPL_DIO_ROUTINGINFO, "routinginfo"},
{ RPL_DIO_CONFIG, "config"},
{ RPL_DAO_RPLTARGET, "rpltarget"},
{ RPL_DAO_TRANSITINFO, "transitinfo"},
{ RPL_DIO_DESTPREFIX, "destprefix"},
{ RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"},
{ 0, NULL},
};
static void
rpl_printopts(netdissect_options *ndo, const uint8_t *opts, u_int length)
{
const struct rpl_genoption *opt;
uint8_t dio_type;
u_int optlen;
while (length != 0) {
opt = (const struct rpl_genoption *)opts;
ND_TCHECK_1(opt->rpl_dio_type);
dio_type = EXTRACT_U_1(opt->rpl_dio_type);
if (dio_type == RPL_OPT_PAD1) {
optlen = 1;
ND_PRINT(" opt:pad1");
} else {
if (length < RPL_GENOPTION_LEN)
goto trunc;
optlen = EXTRACT_U_1(opt->rpl_dio_len)+RPL_GENOPTION_LEN;
ND_PRINT(" opt:%s len:%u ",
tok2str(rpl_subopt_values, "subopt:%u", dio_type),
optlen);
ND_TCHECK_LEN(opt, optlen);
if (length < optlen)
goto trunc;
if (ndo->ndo_vflag > 2) {
hex_print(ndo,
" ",
opts + RPL_GENOPTION_LEN, /* content of DIO option */
optlen - RPL_GENOPTION_LEN);
}
}
opts += optlen;
length -= optlen;
}
return;
trunc:
ND_PRINT(" [|truncated]");
return;
}
static void
rpl_dio_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
const char *dagid_str;
ND_TCHECK_SIZE(dio);
dagid_str = ip6addr_string (ndo, dio->rpl_dagid);
ND_PRINT(" [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
dagid_str,
EXTRACT_U_1(dio->rpl_dtsn),
EXTRACT_U_1(dio->rpl_instanceid),
EXTRACT_BE_U_2(dio->rpl_dagrank),
RPL_DIO_GROUNDED(EXTRACT_U_1(dio->rpl_mopprf)) ? "grounded,":"",
tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(EXTRACT_U_1(dio->rpl_mopprf))),
RPL_DIO_PRF(EXTRACT_U_1(dio->rpl_mopprf)));
if(ndo->ndo_vflag > 1) {
rpl_printopts(ndo, bp + sizeof(struct nd_rpl_dio),
length - sizeof(struct nd_rpl_dio));
}
return;
trunc:
ND_PRINT(" [|truncated]");
return;
}
static void
rpl_dao_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp;
const char *dagid_str = "<elided>";
uint8_t rpl_flags;
ND_TCHECK_SIZE(dao);
if (length < ND_RPL_DAO_MIN_LEN)
goto tooshort;
bp += ND_RPL_DAO_MIN_LEN;
length -= ND_RPL_DAO_MIN_LEN;
rpl_flags = EXTRACT_U_1(dao->rpl_flags);
if(RPL_DAO_D(rpl_flags)) {
ND_TCHECK_LEN(dao->rpl_dagid, DAGID_LEN);
if (length < DAGID_LEN)
goto tooshort;
dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
bp += DAGID_LEN;
length -= DAGID_LEN;
}
ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
dagid_str,
EXTRACT_U_1(dao->rpl_daoseq),
EXTRACT_U_1(dao->rpl_instanceid),
RPL_DAO_K(rpl_flags) ? ",acK":"",
RPL_DAO_D(rpl_flags) ? ",Dagid":"",
rpl_flags);
if(ndo->ndo_vflag > 1) {
rpl_printopts(ndo, bp, length);
}
return;
trunc:
ND_PRINT(" [|truncated]");
return;
tooshort:
ND_PRINT(" [|length too short]");
return;
}
static void
rpl_daoack_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
const char *dagid_str = "<elided>";
ND_TCHECK_LEN(daoack, ND_RPL_DAOACK_MIN_LEN);
if (length < ND_RPL_DAOACK_MIN_LEN)
goto tooshort;
bp += ND_RPL_DAOACK_MIN_LEN;
length -= ND_RPL_DAOACK_MIN_LEN;
if(RPL_DAOACK_D(EXTRACT_U_1(daoack->rpl_flags))) {
ND_TCHECK_LEN(daoack->rpl_dagid, DAGID_LEN);
if (length < DAGID_LEN)
goto tooshort;
dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
bp += DAGID_LEN;
length -= DAGID_LEN;
}
ND_PRINT(" [dagid:%s,seq:%u,instance:%u,status:%u]",
dagid_str,
EXTRACT_U_1(daoack->rpl_daoseq),
EXTRACT_U_1(daoack->rpl_instanceid),
EXTRACT_U_1(daoack->rpl_status));
/* no officially defined options for DAOACK, but print any we find */
if(ndo->ndo_vflag > 1) {
rpl_printopts(ndo, bp, length);
}
return;
trunc:
ND_PRINT(" [|dao-truncated]");
return;
tooshort:
ND_PRINT(" [|dao-length too short]");
return;
}
static void
rpl_print(netdissect_options *ndo,
uint8_t icmp6_code,
const u_char *bp, u_int length)
{
int secured = icmp6_code & 0x80;
int basecode= icmp6_code & 0x7f;
if(secured) {
ND_PRINT(", (SEC) [worktodo]");
/* XXX
* the next header pointer needs to move forward to
* skip the secure part.
*/
return;
} else {
ND_PRINT(", (CLR)");
}
switch(basecode) {
case ND_RPL_DAG_IS:
ND_PRINT("DODAG Information Solicitation");
if(ndo->ndo_vflag) {
}
break;
case ND_RPL_DAG_IO:
ND_PRINT("DODAG Information Object");
if(ndo->ndo_vflag) {
rpl_dio_print(ndo, bp, length);
}
break;
case ND_RPL_DAO:
ND_PRINT("Destination Advertisement Object");
if(ndo->ndo_vflag) {
rpl_dao_print(ndo, bp, length);
}