1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 #ifndef lint
23 static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.86 2008-02-05 19:36:13 guy Exp $";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #ifdef INET6
32
33 #include <tcpdump-stdinc.h>
34
35 #include <stdio.h>
36 #include <string.h>
37
38 #include "interface.h"
39 #include "addrtoname.h"
40 #include "extract.h"
41
42 #include "ip6.h"
43 #include "icmp6.h"
44 #include "ipproto.h"
45
46 #include "udp.h"
47 #include "ah.h"
48
49 static const char *get_rtpref(u_int);
50 static const char *get_lifetime(u_int32_t);
51 static void print_lladdr(const u_char *, size_t);
52 static void icmp6_opt_print(const u_char *, int);
53 static void mld6_print(const u_char *);
54 static void mldv2_report_print(const u_char *, u_int);
55 static void mldv2_query_print(const u_char *, u_int);
56 static struct udphdr *get_upperlayer(u_char *, u_int *);
57 static void dnsname_print(const u_char *, const u_char *);
58 static void icmp6_nodeinfo_print(u_int, const u_char *, const u_char *);
59 static void icmp6_rrenum_print(const u_char *, const u_char *);
60
61 #ifndef abs
62 #define abs(a) ((0 < (a)) ? (a) : -(a))
63 #endif
64
65 /* inline the various RPL definitions */
66 #define ND_RPL_MESSAGE 0x9B
67
68 static const struct tok icmp6_type_values[] = {
69 { ICMP6_DST_UNREACH, "destination unreachable"},
70 { ICMP6_PACKET_TOO_BIG, "packet too big"},
71 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
72 { ICMP6_PARAM_PROB, "parameter problem"},
73 { ICMP6_ECHO_REQUEST, "echo request"},
74 { ICMP6_ECHO_REPLY, "echo reply"},
75 { MLD6_LISTENER_QUERY, "multicast listener query"},
76 { MLD6_LISTENER_REPORT, "multicast listener report"},
77 { MLD6_LISTENER_DONE, "multicast listener done"},
78 { ND_ROUTER_SOLICIT, "router solicitation"},
79 { ND_ROUTER_ADVERT, "router advertisement"},
80 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
81 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
82 { ND_REDIRECT, "redirect"},
83 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
84 { IND_SOLICIT, "inverse neighbor solicitation"},
85 { IND_ADVERT, "inverse neighbor advertisement"},
86 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
87 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
88 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
89 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
90 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
91 { ICMP6_WRUREQUEST, "who-are-you request"},
92 { ICMP6_WRUREPLY, "who-are-you reply"},
93 { ICMP6_NI_QUERY, "node information query"},
94 { ICMP6_NI_REPLY, "node information reply"},
95 { MLD6_MTRACE, "mtrace message"},
96 { MLD6_MTRACE_RESP, "mtrace response"},
97 { ND_RPL_MESSAGE, "RPL"},
98 { 0, NULL }
99 };
100
101 static const struct tok icmp6_dst_unreach_code_values[] = {
102 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
103 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
104 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
105 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
106 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
107 { 0, NULL }
108 };
109
110 static const struct tok icmp6_opt_pi_flag_values[] = {
111 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
112 { ND_OPT_PI_FLAG_AUTO, "auto" },
113 { ND_OPT_PI_FLAG_ROUTER, "router" },
114 { 0, NULL }
115 };
116
117 static const struct tok icmp6_opt_ra_flag_values[] = {
118 { ND_RA_FLAG_MANAGED, "managed" },
119 { ND_RA_FLAG_OTHER, "other stateful"},
120 { ND_RA_FLAG_HOME_AGENT, "home agent"},
121 { 0, NULL }
122 };
123
124 static const struct tok icmp6_nd_na_flag_values[] = {
125 { ND_NA_FLAG_ROUTER, "router" },
126 { ND_NA_FLAG_SOLICITED, "solicited" },
127 { ND_NA_FLAG_OVERRIDE, "override" },
128 { 0, NULL }
129 };
130
131
132 static const struct tok icmp6_opt_values[] = {
133 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
134 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
135 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
136 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
137 { ND_OPT_MTU, "mtu"},
138 { ND_OPT_RDNSS, "rdnss"},
139 { ND_OPT_DNSSL, "dnssl"},
140 { ND_OPT_ADVINTERVAL, "advertisement interval"},
141 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
142 { ND_OPT_ROUTE_INFO, "route info"},
143 { 0, NULL }
144 };
145
146 /* mldv2 report types */
147 static const struct tok mldv2report2str[] = {
148 { 1, "is_in" },
149 { 2, "is_ex" },
150 { 3, "to_in" },
151 { 4, "to_ex" },
152 { 5, "allow" },
153 { 6, "block" },
154 { 0, NULL }
155 };
156
157 static const char *
get_rtpref(u_int v)158 get_rtpref(u_int v)
159 {
160 static const char *rtpref_str[] = {
161 "medium", /* 00 */
162 "high", /* 01 */
163 "rsv", /* 10 */
164 "low" /* 11 */
165 };
166
167 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
168 }
169
170 static const char *
get_lifetime(u_int32_t v)171 get_lifetime(u_int32_t v)
172 {
173 static char buf[20];
174
175 if (v == (u_int32_t)~0UL)
176 return "infinity";
177 else {
178 snprintf(buf, sizeof(buf), "%us", v);
179 return buf;
180 }
181 }
182
183 static void
print_lladdr(const u_int8_t * p,size_t l)184 print_lladdr(const u_int8_t *p, size_t l)
185 {
186 const u_int8_t *ep, *q;
187
188 q = p;
189 ep = p + l;
190 while (l > 0 && q < ep) {
191 if (q > p)
192 printf(":");
193 printf("%02x", *q++);
194 l--;
195 }
196 }
197
icmp6_cksum(const struct ip6_hdr * ip6,const struct icmp6_hdr * icp,u_int len)198 static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
199 u_int len)
200 {
201 return (nextproto6_cksum(ip6, (const u_int8_t *)(void *)icp, len,
202 IPPROTO_ICMPV6));
203 }
204
205 enum ND_RPL_CODE {
206 ND_RPL_DIS =0x00,
207 ND_RPL_DIO =0x01,
208 ND_RPL_DAO =0x02,
209 ND_RPL_DAO_ACK=0x03,
210 ND_RPL_SDIS =0x80,
211 ND_RPL_SDIO =0x81,
212 ND_RPL_SDAO =0x82,
213 ND_RPL_SDAO_ACK=0x83,
214 ND_RPL_SCC =0x8A,
215 };
216
217 enum ND_RPL_DIO_FLAGS {
218 ND_RPL_DIO_GROUNDED = 0x80,
219 ND_RPL_DIO_DATRIG = 0x40,
220 ND_RPL_DIO_DASUPPORT= 0x20,
221 ND_RPL_DIO_RES4 = 0x10,
222 ND_RPL_DIO_RES3 = 0x08,
223 ND_RPL_DIO_PRF_MASK = 0x07, /* 3-bit preference */
224 };
225
226 struct nd_rpl_dio {
227 u_int8_t rpl_flags;
228 u_int8_t rpl_seq;
229 u_int8_t rpl_instanceid;
230 u_int8_t rpl_dagrank;
231 u_int8_t rpl_dagid[16];
232 };
233
234 static void
rpl_print(netdissect_options * ndo,const struct icmp6_hdr * hdr,const u_char * bp,u_int length _U_)235 rpl_print(netdissect_options *ndo,
236 const struct icmp6_hdr *hdr,
237 const u_char *bp, u_int length _U_)
238 {
239 struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp;
240 int secured = hdr->icmp6_code & 0x80;
241 int basecode= hdr->icmp6_code & 0x7f;
242
243 ND_TCHECK(dio->rpl_dagid);
244
245 if(secured) {
246 ND_PRINT((ndo, ", (SEC)"));
247 } else {
248 ND_PRINT((ndo, ", (CLR)"));
249 }
250
251 switch(basecode) {
252 case ND_RPL_DIS:
253 ND_PRINT((ndo, "DODAG Information Solicitation"));
254 if(ndo->ndo_vflag) {
255 }
256 break;
257 case ND_RPL_DIO:
258 ND_PRINT((ndo, "DODAG Information Object"));
259 if(ndo->ndo_vflag) {
260 char dagid[65];
261 char *d = dagid;
262 int i;
263 for(i=0;i<16;i++) {
264 if(isprint(dio->rpl_dagid[i])) {
265 *d++ = dio->rpl_dagid[i];
266 } else {
267 int cnt=snprintf(d,4,"0x%02x",
268 dio->rpl_dagid[i]);
269 d += cnt;
270 }
271 }
272 *d++ = '\0';
273 ND_PRINT((ndo, " [seq:%u,instance:%u,rank:%u,dagid:%s]",
274 dio->rpl_seq,
275 dio->rpl_instanceid,
276 dio->rpl_dagrank,
277 dagid));
278 }
279 break;
280 case ND_RPL_DAO:
281 ND_PRINT((ndo, "Destination Advertisement Object"));
282 if(ndo->ndo_vflag) {
283 }
284 break;
285 case ND_RPL_DAO_ACK:
286 ND_PRINT((ndo, "Destination Advertisement Object Ack"));
287 if(ndo->ndo_vflag) {
288 }
289 break;
290 default:
291 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
292 break;
293 }
294 return;
295 trunc:
296 ND_PRINT((ndo," [|truncated]"));
297 return;
298
299 }
300
301
302 void
icmp6_print(netdissect_options * ndo,const u_char * bp,u_int length,const u_char * bp2,int fragmented)303 icmp6_print(netdissect_options *ndo,
304 const u_char *bp, u_int length, const u_char *bp2, int fragmented)
305 {
306 const struct icmp6_hdr *dp;
307 const struct ip6_hdr *ip;
308 const struct ip6_hdr *oip;
309 const struct udphdr *ouh;
310 int dport;
311 const u_char *ep;
312 u_int prot;
313
314 dp = (struct icmp6_hdr *)bp;
315 ip = (struct ip6_hdr *)bp2;
316 oip = (struct ip6_hdr *)(dp + 1);
317 /* 'ep' points to the end of available data. */
318 ep = snapend;
319
320 TCHECK(dp->icmp6_cksum);
321
322 if (vflag && !fragmented) {
323 u_int16_t sum, udp_sum;
324
325 if (TTEST2(bp[0], length)) {
326 udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
327 sum = icmp6_cksum(ip, dp, length);
328 if (sum != 0)
329 (void)printf("[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
330 udp_sum,
331 in_cksum_shouldbe(udp_sum, sum));
332 else
333 (void)printf("[icmp6 sum ok] ");
334 }
335 }
336
337 printf("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type));
338
339 /* display cosmetics: print the packet length for printer that use the vflag now */
340 if (vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
341 dp->icmp6_type == ND_ROUTER_ADVERT ||
342 dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
343 dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
344 dp->icmp6_type == ND_REDIRECT ||
345 dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
346 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
347 printf(", length %u", length);
348
349 switch (dp->icmp6_type) {
350 case ICMP6_DST_UNREACH:
351 TCHECK(oip->ip6_dst);
352 printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code));
353 switch (dp->icmp6_code) {
354
355 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
356 case ICMP6_DST_UNREACH_ADMIN:
357 case ICMP6_DST_UNREACH_ADDR:
358 printf(" %s",ip6addr_string(&oip->ip6_dst));
359 break;
360 case ICMP6_DST_UNREACH_BEYONDSCOPE:
361 printf(" %s, source address %s",
362 ip6addr_string(&oip->ip6_dst),
363 ip6addr_string(&oip->ip6_src));
364 break;
365 case ICMP6_DST_UNREACH_NOPORT:
366 if ((ouh = get_upperlayer((u_char *)oip, &prot))
367 == NULL)
368 goto trunc;
369
370 dport = EXTRACT_16BITS(&ouh->uh_dport);
371 switch (prot) {
372 case IPPROTO_TCP:
373 printf(", %s tcp port %s",
374 ip6addr_string(&oip->ip6_dst),
375 tcpport_string(dport));
376 break;
377 case IPPROTO_UDP:
378 printf(", %s udp port %s",
379 ip6addr_string(&oip->ip6_dst),
380 udpport_string(dport));
381 break;
382 default:
383 printf(", %s protocol %d port %d unreachable",
384 ip6addr_string(&oip->ip6_dst),
385 oip->ip6_nxt, dport);
386 break;
387 }
388 break;
389 default:
390 if (vflag <= 1) {
391 print_unknown_data(bp,"\n\t",length);
392 return;
393 }
394 break;
395 }
396 break;
397 case ICMP6_PACKET_TOO_BIG:
398 TCHECK(dp->icmp6_mtu);
399 printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu));
400 break;
401 case ICMP6_TIME_EXCEEDED:
402 TCHECK(oip->ip6_dst);
403 switch (dp->icmp6_code) {
404 case ICMP6_TIME_EXCEED_TRANSIT:
405 printf(" for %s",
406 ip6addr_string(&oip->ip6_dst));
407 break;
408 case ICMP6_TIME_EXCEED_REASSEMBLY:
409 printf(" (reassembly)");
410 break;
411 default:
412 printf(", unknown code (%u)", dp->icmp6_code);
413 break;
414 }
415 break;
416 case ICMP6_PARAM_PROB:
417 TCHECK(oip->ip6_dst);
418 switch (dp->icmp6_code) {
419 case ICMP6_PARAMPROB_HEADER:
420 printf(", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
421 break;
422 case ICMP6_PARAMPROB_NEXTHEADER:
423 printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
424 break;
425 case ICMP6_PARAMPROB_OPTION:
426 printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
427 break;
428 default:
429 printf(", code-#%d",
430 dp->icmp6_code);
431 break;
432 }
433 break;
434 case ICMP6_ECHO_REQUEST:
435 case ICMP6_ECHO_REPLY:
436 TCHECK(dp->icmp6_seq);
437 printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq));
438 break;
439 case ICMP6_MEMBERSHIP_QUERY:
440 if (length == MLD_MINLEN) {
441 mld6_print((const u_char *)dp);
442 } else if (length >= MLDV2_MINLEN) {
443 printf(" v2");
444 mldv2_query_print((const u_char *)dp, length);
445 } else {
446 printf(" unknown-version (len %u) ", length);
447 }
448 break;
449 case ICMP6_MEMBERSHIP_REPORT:
450 mld6_print((const u_char *)dp);
451 break;
452 case ICMP6_MEMBERSHIP_REDUCTION:
453 mld6_print((const u_char *)dp);
454 break;
455 case ND_ROUTER_SOLICIT:
456 #define RTSOLLEN 8
457 if (vflag) {
458 icmp6_opt_print((const u_char *)dp + RTSOLLEN,
459 length - RTSOLLEN);
460 }
461 break;
462 case ND_ROUTER_ADVERT:
463 #define RTADVLEN 16
464 if (vflag) {
465 struct nd_router_advert *p;
466
467 p = (struct nd_router_advert *)dp;
468 TCHECK(p->nd_ra_retransmit);
469 printf("\n\thop limit %u, Flags [%s]" \
470 ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
471 (u_int)p->nd_ra_curhoplimit,
472 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
473 get_rtpref(p->nd_ra_flags_reserved),
474 EXTRACT_16BITS(&p->nd_ra_router_lifetime),
475 EXTRACT_32BITS(&p->nd_ra_reachable),
476 EXTRACT_32BITS(&p->nd_ra_retransmit));
477
478 icmp6_opt_print((const u_char *)dp + RTADVLEN,
479 length - RTADVLEN);
480 }
481 break;
482 case ND_NEIGHBOR_SOLICIT:
483 {
484 struct nd_neighbor_solicit *p;
485 p = (struct nd_neighbor_solicit *)dp;
486 TCHECK(p->nd_ns_target);
487 printf(", who has %s", ip6addr_string(&p->nd_ns_target));
488 if (vflag) {
489 #define NDSOLLEN 24
490 icmp6_opt_print((const u_char *)dp + NDSOLLEN,
491 length - NDSOLLEN);
492 }
493 }
494 break;
495 case ND_NEIGHBOR_ADVERT:
496 {
497 struct nd_neighbor_advert *p;
498
499 p = (struct nd_neighbor_advert *)dp;
500 TCHECK(p->nd_na_target);
501 printf(", tgt is %s",
502 ip6addr_string(&p->nd_na_target));
503 if (vflag) {
504 printf(", Flags [%s]",
505 bittok2str(icmp6_nd_na_flag_values,
506 "none",
507 EXTRACT_32BITS(&p->nd_na_flags_reserved)));
508 #define NDADVLEN 24
509 icmp6_opt_print((const u_char *)dp + NDADVLEN,
510 length - NDADVLEN);
511 #undef NDADVLEN
512 }
513 }
514 break;
515 case ND_REDIRECT:
516 #define RDR(i) ((struct nd_redirect *)(i))
517 TCHECK(RDR(dp)->nd_rd_dst);
518 printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst));
519 TCHECK(RDR(dp)->nd_rd_target);
520 printf(" to %s",
521 getname6((const u_char*)&RDR(dp)->nd_rd_target));
522 #define REDIRECTLEN 40
523 if (vflag) {
524 icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
525 length - REDIRECTLEN);
526 }
527 break;
528 #undef REDIRECTLEN
529 #undef RDR
530 case ICMP6_ROUTER_RENUMBERING:
531 icmp6_rrenum_print(bp, ep);
532 break;
533 case ICMP6_NI_QUERY:
534 case ICMP6_NI_REPLY:
535 icmp6_nodeinfo_print(length, bp, ep);
536 break;
537 case IND_SOLICIT:
538 case IND_ADVERT:
539 break;
540 case ICMP6_V2_MEMBERSHIP_REPORT:
541 mldv2_report_print((const u_char *) dp, length);
542 break;
543 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
544 case ICMP6_HADISCOV_REQUEST:
545 TCHECK(dp->icmp6_data16[0]);
546 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
547 break;
548 case ICMP6_HADISCOV_REPLY:
549 if (vflag) {
550 struct in6_addr *in6;
551 u_char *cp;
552
553 TCHECK(dp->icmp6_data16[0]);
554 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
555 cp = (u_char *)dp + length;
556 in6 = (struct in6_addr *)(dp + 1);
557 for (; (u_char *)in6 < cp; in6++) {
558 TCHECK(*in6);
559 printf(", %s", ip6addr_string(in6));
560 }
561 }
562 break;
563 case ICMP6_MOBILEPREFIX_ADVERT:
564 if (vflag) {
565 TCHECK(dp->icmp6_data16[0]);
566 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
567 if (dp->icmp6_data16[1] & 0xc0)
568 printf(" ");
569 if (dp->icmp6_data16[1] & 0x80)
570 printf("M");
571 if (dp->icmp6_data16[1] & 0x40)
572 printf("O");
573 #define MPADVLEN 8
574 icmp6_opt_print((const u_char *)dp + MPADVLEN,
575 length - MPADVLEN);
576 }
577 break;
578 case ND_RPL_MESSAGE:
579 rpl_print(ndo, dp, &dp->icmp6_data8[0], length);
580 break;
581 default:
582 printf(", length %u", length);
583 if (vflag <= 1)
584 print_unknown_data(bp,"\n\t", length);
585 return;
586 }
587 if (!vflag)
588 printf(", length %u", length);
589 return;
590 trunc:
591 fputs("[|icmp6]", stdout);
592 }
593
594 static struct udphdr *
get_upperlayer(u_char * bp,u_int * prot)595 get_upperlayer(u_char *bp, u_int *prot)
596 {
597 const u_char *ep;
598 struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
599 struct udphdr *uh;
600 struct ip6_hbh *hbh;
601 struct ip6_frag *fragh;
602 struct ah *ah;
603 u_int nh;
604 int hlen;
605
606 /* 'ep' points to the end of available data. */
607 ep = snapend;
608
609 if (!TTEST(ip6->ip6_nxt))
610 return NULL;
611
612 nh = ip6->ip6_nxt;
613 hlen = sizeof(struct ip6_hdr);
614
615 while (bp < ep) {
616 bp += hlen;
617
618 switch(nh) {
619 case IPPROTO_UDP:
620 case IPPROTO_TCP:
621 uh = (struct udphdr *)bp;
622 if (TTEST(uh->uh_dport)) {
623 *prot = nh;
624 return(uh);
625 }
626 else
627 return(NULL);
628 /* NOTREACHED */
629
630 case IPPROTO_HOPOPTS:
631 case IPPROTO_DSTOPTS:
632 case IPPROTO_ROUTING:
633 hbh = (struct ip6_hbh *)bp;
634 if (!TTEST(hbh->ip6h_len))
635 return(NULL);
636 nh = hbh->ip6h_nxt;
637 hlen = (hbh->ip6h_len + 1) << 3;
638 break;
639
640 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
641 fragh = (struct ip6_frag *)bp;
642 if (!TTEST(fragh->ip6f_offlg))
643 return(NULL);
644 /* fragments with non-zero offset are meaningless */
645 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
646 return(NULL);
647 nh = fragh->ip6f_nxt;
648 hlen = sizeof(struct ip6_frag);
649 break;
650
651 case IPPROTO_AH:
652 ah = (struct ah *)bp;
653 if (!TTEST(ah->ah_len))
654 return(NULL);
655 nh = ah->ah_nxt;
656 hlen = (ah->ah_len + 2) << 2;
657 break;
658
659 default: /* unknown or undecodable header */
660 *prot = nh; /* meaningless, but set here anyway */
661 return(NULL);
662 }
663 }
664
665 return(NULL); /* should be notreached, though */
666 }
667
668 static void
icmp6_opt_print(const u_char * bp,int resid)669 icmp6_opt_print(const u_char *bp, int resid)
670 {
671 const struct nd_opt_hdr *op;
672 const struct nd_opt_prefix_info *opp;
673 const struct nd_opt_mtu *opm;
674 const struct nd_opt_rdnss *oprd;
675 const struct nd_opt_dnssl *opds;
676 const struct nd_opt_advinterval *opa;
677 const struct nd_opt_homeagent_info *oph;
678 const struct nd_opt_route_info *opri;
679 const u_char *cp, *ep, *domp;
680 struct in6_addr in6, *in6p;
681 size_t l;
682 u_int i;
683
684 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
685
686 cp = bp;
687 /* 'ep' points to the end of available data. */
688 ep = snapend;
689
690 while (cp < ep) {
691 op = (struct nd_opt_hdr *)cp;
692
693 ECHECK(op->nd_opt_len);
694 if (resid <= 0)
695 return;
696 if (op->nd_opt_len == 0)
697 goto trunc;
698 if (cp + (op->nd_opt_len << 3) > ep)
699 goto trunc;
700
701 printf("\n\t %s option (%u), length %u (%u): ",
702 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
703 op->nd_opt_type,
704 op->nd_opt_len << 3,
705 op->nd_opt_len);
706
707 switch (op->nd_opt_type) {
708 case ND_OPT_SOURCE_LINKADDR:
709 l = (op->nd_opt_len << 3) - 2;
710 print_lladdr(cp + 2, l);
711 break;
712 case ND_OPT_TARGET_LINKADDR:
713 l = (op->nd_opt_len << 3) - 2;
714 print_lladdr(cp + 2, l);
715 break;
716 case ND_OPT_PREFIX_INFORMATION:
717 opp = (struct nd_opt_prefix_info *)op;
718 TCHECK(opp->nd_opt_pi_prefix);
719 printf("%s/%u%s, Flags [%s], valid time %s",
720 ip6addr_string(&opp->nd_opt_pi_prefix),
721 opp->nd_opt_pi_prefix_len,
722 (op->nd_opt_len != 4) ? "badlen" : "",
723 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
724 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)));
725 printf(", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)));
726 break;
727 case ND_OPT_REDIRECTED_HEADER:
728 print_unknown_data(bp,"\n\t ",op->nd_opt_len<<3);
729 /* xxx */
730 break;
731 case ND_OPT_MTU:
732 opm = (struct nd_opt_mtu *)op;
733 TCHECK(opm->nd_opt_mtu_mtu);
734 printf(" %u%s",
735 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
736 (op->nd_opt_len != 1) ? "bad option length" : "" );
737 break;
738 case ND_OPT_RDNSS:
739 oprd = (struct nd_opt_rdnss *)op;
740 l = (op->nd_opt_len - 1) / 2;
741 printf(" lifetime %us,",
742 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime));
743 for (i = 0; i < l; i++) {
744 TCHECK(oprd->nd_opt_rdnss_addr[i]);
745 printf(" addr: %s",
746 ip6addr_string(&oprd->nd_opt_rdnss_addr[i]));
747 }
748 break;
749 case ND_OPT_DNSSL:
750 opds = (struct nd_opt_dnssl *)op;
751 printf(" lifetime %us, domain(s):",
752 EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime));
753 domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
754 while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0')
755 {
756 printf (" ");
757 if ((domp = ns_nprint (domp, bp)) == NULL)
758 goto trunc;
759 }
760 break;
761 case ND_OPT_ADVINTERVAL:
762 opa = (struct nd_opt_advinterval *)op;
763 TCHECK(opa->nd_opt_adv_interval);
764 printf(" %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval));
765 break;
766 case ND_OPT_HOMEAGENT_INFO:
767 oph = (struct nd_opt_homeagent_info *)op;
768 TCHECK(oph->nd_opt_hai_lifetime);
769 printf(" preference %u, lifetime %u",
770 EXTRACT_16BITS(&oph->nd_opt_hai_preference),
771 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime));
772 break;
773 case ND_OPT_ROUTE_INFO:
774 opri = (struct nd_opt_route_info *)op;
775 TCHECK(opri->nd_opt_rti_lifetime);
776 memset(&in6, 0, sizeof(in6));
777 in6p = (struct in6_addr *)(opri + 1);
778 switch (op->nd_opt_len) {
779 case 1:
780 break;
781 case 2:
782 TCHECK2(*in6p, 8);
783 memcpy(&in6, opri + 1, 8);
784 break;
785 case 3:
786 TCHECK(*in6p);
787 memcpy(&in6, opri + 1, sizeof(in6));
788 break;
789 default:
790 goto trunc;
791 }
792 printf(" %s/%u", ip6addr_string(&in6),
793 opri->nd_opt_rti_prefixlen);
794 printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
795 printf(", lifetime=%s",
796 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)));
797 break;
798 default:
799 if (vflag <= 1) {
800 print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
801 return;
802 }
803 break;
804 }
805 /* do we want to see an additional hexdump ? */
806 if (vflag> 1)
807 print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
808
809 cp += op->nd_opt_len << 3;
810 resid -= op->nd_opt_len << 3;
811 }
812 return;
813
814 trunc:
815 fputs("[ndp opt]", stdout);
816 return;
817 #undef ECHECK
818 }
819
820 static void
mld6_print(const u_char * bp)821 mld6_print(const u_char *bp)
822 {
823 struct mld6_hdr *mp = (struct mld6_hdr *)bp;
824 const u_char *ep;
825
826 /* 'ep' points to the end of available data. */
827 ep = snapend;
828
829 if ((u_char *)mp + sizeof(*mp) > ep)
830 return;
831
832 printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay));
833 printf("addr: %s", ip6addr_string(&mp->mld6_addr));
834 }
835
836 static void
mldv2_report_print(const u_char * bp,u_int len)837 mldv2_report_print(const u_char *bp, u_int len)
838 {
839 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
840 u_int group, nsrcs, ngroups;
841 u_int i, j;
842
843 /* Minimum len is 8 */
844 if (len < 8) {
845 printf(" [invalid len %d]", len);
846 return;
847 }
848
849 TCHECK(icp->icmp6_data16[1]);
850 ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
851 printf(", %d group record(s)", ngroups);
852 if (vflag > 0) {
853 /* Print the group records */
854 group = 8;
855 for (i = 0; i < ngroups; i++) {
856 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
857 if (len < group + 20) {
858 printf(" [invalid number of groups]");
859 return;
860 }
861 TCHECK2(bp[group + 4], sizeof(struct in6_addr));
862 printf(" [gaddr %s", ip6addr_string(&bp[group + 4]));
863 printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]",
864 bp[group]));
865 nsrcs = (bp[group + 2] << 8) + bp[group + 3];
866 /* Check the number of sources and print them */
867 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
868 printf(" [invalid number of sources %d]", nsrcs);
869 return;
870 }
871 if (vflag == 1)
872 printf(", %d source(s)", nsrcs);
873 else {
874 /* Print the sources */
875 (void)printf(" {");
876 for (j = 0; j < nsrcs; j++) {
877 TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
878 sizeof(struct in6_addr));
879 printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)]));
880 }
881 (void)printf(" }");
882 }
883 /* Next group record */
884 group += 20 + nsrcs * sizeof(struct in6_addr);
885 printf("]");
886 }
887 }
888 return;
889 trunc:
890 (void)printf("[|icmp6]");
891 return;
892 }
893
894 static void
mldv2_query_print(const u_char * bp,u_int len)895 mldv2_query_print(const u_char *bp, u_int len)
896 {
897 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
898 u_int mrc;
899 int mrt, qqi;
900 u_int nsrcs;
901 register u_int i;
902
903 /* Minimum len is 28 */
904 if (len < 28) {
905 printf(" [invalid len %d]", len);
906 return;
907 }
908 TCHECK(icp->icmp6_data16[0]);
909 mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
910 if (mrc < 32768) {
911 mrt = mrc;
912 } else {
913 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
914 }
915 if (vflag) {
916 (void)printf(" [max resp delay=%d]", mrt);
917 }
918 TCHECK2(bp[8], sizeof(struct in6_addr));
919 printf(" [gaddr %s", ip6addr_string(&bp[8]));
920
921 if (vflag) {
922 TCHECK(bp[25]);
923 if (bp[24] & 0x08) {
924 printf(" sflag");
925 }
926 if (bp[24] & 0x07) {
927 printf(" robustness=%d", bp[24] & 0x07);
928 }
929 if (bp[25] < 128) {
930 qqi = bp[25];
931 } else {
932 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
933 }
934 printf(" qqi=%d", qqi);
935 }
936
937 TCHECK2(bp[26], 2);
938 nsrcs = EXTRACT_16BITS(&bp[26]);
939 if (nsrcs > 0) {
940 if (len < 28 + nsrcs * sizeof(struct in6_addr))
941 printf(" [invalid number of sources]");
942 else if (vflag > 1) {
943 printf(" {");
944 for (i = 0; i < nsrcs; i++) {
945 TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
946 sizeof(struct in6_addr));
947 printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)]));
948 }
949 printf(" }");
950 } else
951 printf(", %d source(s)", nsrcs);
952 }
953 printf("]");
954 return;
955 trunc:
956 (void)printf("[|icmp6]");
957 return;
958 }
959
960 static void
dnsname_print(const u_char * cp,const u_char * ep)961 dnsname_print(const u_char *cp, const u_char *ep)
962 {
963 int i;
964
965 /* DNS name decoding - no decompression */
966 printf(", \"");
967 while (cp < ep) {
968 i = *cp++;
969 if (i) {
970 if (i > ep - cp) {
971 printf("???");
972 break;
973 }
974 while (i-- && cp < ep) {
975 safeputchar(*cp);
976 cp++;
977 }
978 if (cp + 1 < ep && *cp)
979 printf(".");
980 } else {
981 if (cp == ep) {
982 /* FQDN */
983 printf(".");
984 } else if (cp + 1 == ep && *cp == '\0') {
985 /* truncated */
986 } else {
987 /* invalid */
988 printf("???");
989 }
990 break;
991 }
992 }
993 printf("\"");
994 }
995
996 static void
icmp6_nodeinfo_print(u_int icmp6len,const u_char * bp,const u_char * ep)997 icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep)
998 {
999 struct icmp6_nodeinfo *ni6;
1000 struct icmp6_hdr *dp;
1001 const u_char *cp;
1002 size_t siz, i;
1003 int needcomma;
1004
1005 if (ep < bp)
1006 return;
1007 dp = (struct icmp6_hdr *)bp;
1008 ni6 = (struct icmp6_nodeinfo *)bp;
1009 siz = ep - bp;
1010
1011 switch (ni6->ni_type) {
1012 case ICMP6_NI_QUERY:
1013 if (siz == sizeof(*dp) + 4) {
1014 /* KAME who-are-you */
1015 printf(" who-are-you request");
1016 break;
1017 }
1018 printf(" node information query");
1019
1020 TCHECK2(*dp, sizeof(*ni6));
1021 ni6 = (struct icmp6_nodeinfo *)dp;
1022 printf(" ("); /*)*/
1023 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1024 case NI_QTYPE_NOOP:
1025 printf("noop");
1026 break;
1027 case NI_QTYPE_SUPTYPES:
1028 printf("supported qtypes");
1029 i = EXTRACT_16BITS(&ni6->ni_flags);
1030 if (i)
1031 printf(" [%s]", (i & 0x01) ? "C" : "");
1032 break;
1033 break;
1034 case NI_QTYPE_FQDN:
1035 printf("DNS name");
1036 break;
1037 case NI_QTYPE_NODEADDR:
1038 printf("node addresses");
1039 i = ni6->ni_flags;
1040 if (!i)
1041 break;
1042 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1043 printf(" [%s%s%s%s%s%s]",
1044 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1045 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1046 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1047 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1048 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1049 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
1050 break;
1051 default:
1052 printf("unknown");
1053 break;
1054 }
1055
1056 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1057 ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1058 if (siz != sizeof(*ni6))
1059 if (vflag)
1060 printf(", invalid len");
1061 /*(*/
1062 printf(")");
1063 break;
1064 }
1065
1066
1067 /* XXX backward compat, icmp-name-lookup-03 */
1068 if (siz == sizeof(*ni6)) {
1069 printf(", 03 draft");
1070 /*(*/
1071 printf(")");
1072 break;
1073 }
1074
1075 switch (ni6->ni_code) {
1076 case ICMP6_NI_SUBJ_IPV6:
1077 if (!TTEST2(*dp,
1078 sizeof(*ni6) + sizeof(struct in6_addr)))
1079 break;
1080 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1081 if (vflag)
1082 printf(", invalid subject len");
1083 break;
1084 }
1085 printf(", subject=%s",
1086 getname6((const u_char *)(ni6 + 1)));
1087 break;
1088 case ICMP6_NI_SUBJ_FQDN:
1089 printf(", subject=DNS name");
1090 cp = (const u_char *)(ni6 + 1);
1091 if (cp[0] == ep - cp - 1) {
1092 /* icmp-name-lookup-03, pascal string */
1093 if (vflag)
1094 printf(", 03 draft");
1095 cp++;
1096 printf(", \"");
1097 while (cp < ep) {
1098 safeputchar(*cp);
1099 cp++;
1100 }
1101 printf("\"");
1102 } else
1103 dnsname_print(cp, ep);
1104 break;
1105 case ICMP6_NI_SUBJ_IPV4:
1106 if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1107 break;
1108 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1109 if (vflag)
1110 printf(", invalid subject len");
1111 break;
1112 }
1113 printf(", subject=%s",
1114 getname((const u_char *)(ni6 + 1)));
1115 break;
1116 default:
1117 printf(", unknown subject");
1118 break;
1119 }
1120
1121 /*(*/
1122 printf(")");
1123 break;
1124
1125 case ICMP6_NI_REPLY:
1126 if (icmp6len > siz) {
1127 printf("[|icmp6: node information reply]");
1128 break;
1129 }
1130
1131 needcomma = 0;
1132
1133 ni6 = (struct icmp6_nodeinfo *)dp;
1134 printf(" node information reply");
1135 printf(" ("); /*)*/
1136 switch (ni6->ni_code) {
1137 case ICMP6_NI_SUCCESS:
1138 if (vflag) {
1139 printf("success");
1140 needcomma++;
1141 }
1142 break;
1143 case ICMP6_NI_REFUSED:
1144 printf("refused");
1145 needcomma++;
1146 if (siz != sizeof(*ni6))
1147 if (vflag)
1148 printf(", invalid length");
1149 break;
1150 case ICMP6_NI_UNKNOWN:
1151 printf("unknown");
1152 needcomma++;
1153 if (siz != sizeof(*ni6))
1154 if (vflag)
1155 printf(", invalid length");
1156 break;
1157 }
1158
1159 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1160 /*(*/
1161 printf(")");
1162 break;
1163 }
1164
1165 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1166 case NI_QTYPE_NOOP:
1167 if (needcomma)
1168 printf(", ");
1169 printf("noop");
1170 if (siz != sizeof(*ni6))
1171 if (vflag)
1172 printf(", invalid length");
1173 break;
1174 case NI_QTYPE_SUPTYPES:
1175 if (needcomma)
1176 printf(", ");
1177 printf("supported qtypes");
1178 i = EXTRACT_16BITS(&ni6->ni_flags);
1179 if (i)
1180 printf(" [%s]", (i & 0x01) ? "C" : "");
1181 break;
1182 case NI_QTYPE_FQDN:
1183 if (needcomma)
1184 printf(", ");
1185 printf("DNS name");
1186 cp = (const u_char *)(ni6 + 1) + 4;
1187 if (cp[0] == ep - cp - 1) {
1188 /* icmp-name-lookup-03, pascal string */
1189 if (vflag)
1190 printf(", 03 draft");
1191 cp++;
1192 printf(", \"");
1193 while (cp < ep) {
1194 safeputchar(*cp);
1195 cp++;
1196 }
1197 printf("\"");
1198 } else
1199 dnsname_print(cp, ep);
1200 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1201 printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
1202 break;
1203 case NI_QTYPE_NODEADDR:
1204 if (needcomma)
1205 printf(", ");
1206 printf("node addresses");
1207 i = sizeof(*ni6);
1208 while (i < siz) {
1209 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1210 break;
1211 printf(" %s", getname6(bp + i));
1212 i += sizeof(struct in6_addr);
1213 printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i));
1214 i += sizeof(int32_t);
1215 }
1216 i = ni6->ni_flags;
1217 if (!i)
1218 break;
1219 printf(" [%s%s%s%s%s%s%s]",
1220 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1221 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1222 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1223 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1224 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1225 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1226 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1227 break;
1228 default:
1229 if (needcomma)
1230 printf(", ");
1231 printf("unknown");
1232 break;
1233 }
1234
1235 /*(*/
1236 printf(")");
1237 break;
1238 }
1239 return;
1240
1241 trunc:
1242 fputs("[|icmp6]", stdout);
1243 }
1244
1245 static void
icmp6_rrenum_print(const u_char * bp,const u_char * ep)1246 icmp6_rrenum_print(const u_char *bp, const u_char *ep)
1247 {
1248 struct icmp6_router_renum *rr6;
1249 const char *cp;
1250 struct rr_pco_match *match;
1251 struct rr_pco_use *use;
1252 char hbuf[NI_MAXHOST];
1253 int n;
1254
1255 if (ep < bp)
1256 return;
1257 rr6 = (struct icmp6_router_renum *)bp;
1258 cp = (const char *)(rr6 + 1);
1259
1260 TCHECK(rr6->rr_reserved);
1261 switch (rr6->rr_code) {
1262 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1263 printf("router renum: command");
1264 break;
1265 case ICMP6_ROUTER_RENUMBERING_RESULT:
1266 printf("router renum: result");
1267 break;
1268 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1269 printf("router renum: sequence number reset");
1270 break;
1271 default:
1272 printf("router renum: code-#%d", rr6->rr_code);
1273 break;
1274 }
1275
1276 printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum));
1277
1278 if (vflag) {
1279 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1280 printf("["); /*]*/
1281 if (rr6->rr_flags) {
1282 printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1283 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1284 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1285 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1286 F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1287 }
1288 printf("seg=%u,", rr6->rr_segnum);
1289 printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay));
1290 if (rr6->rr_reserved)
1291 printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved));
1292 /*[*/
1293 printf("]");
1294 #undef F
1295 }
1296
1297 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1298 match = (struct rr_pco_match *)cp;
1299 cp = (const char *)(match + 1);
1300
1301 TCHECK(match->rpm_prefix);
1302
1303 if (vflag > 1)
1304 printf("\n\t");
1305 else
1306 printf(" ");
1307 printf("match("); /*)*/
1308 switch (match->rpm_code) {
1309 case RPM_PCO_ADD: printf("add"); break;
1310 case RPM_PCO_CHANGE: printf("change"); break;
1311 case RPM_PCO_SETGLOBAL: printf("setglobal"); break;
1312 default: printf("#%u", match->rpm_code); break;
1313 }
1314
1315 if (vflag) {
1316 printf(",ord=%u", match->rpm_ordinal);
1317 printf(",min=%u", match->rpm_minlen);
1318 printf(",max=%u", match->rpm_maxlen);
1319 }
1320 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1321 printf(",%s/%u", hbuf, match->rpm_matchlen);
1322 else
1323 printf(",?/%u", match->rpm_matchlen);
1324 /*(*/
1325 printf(")");
1326
1327 n = match->rpm_len - 3;
1328 if (n % 4)
1329 goto trunc;
1330 n /= 4;
1331 while (n-- > 0) {
1332 use = (struct rr_pco_use *)cp;
1333 cp = (const char *)(use + 1);
1334
1335 TCHECK(use->rpu_prefix);
1336
1337 if (vflag > 1)
1338 printf("\n\t");
1339 else
1340 printf(" ");
1341 printf("use("); /*)*/
1342 if (use->rpu_flags) {
1343 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1344 printf("%s%s,",
1345 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1346 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
1347 #undef F
1348 }
1349 if (vflag) {
1350 printf("mask=0x%x,", use->rpu_ramask);
1351 printf("raflags=0x%x,", use->rpu_raflags);
1352 if (~use->rpu_vltime == 0)
1353 printf("vltime=infty,");
1354 else
1355 printf("vltime=%u,",
1356 EXTRACT_32BITS(&use->rpu_vltime));
1357 if (~use->rpu_pltime == 0)
1358 printf("pltime=infty,");
1359 else
1360 printf("pltime=%u,",
1361 EXTRACT_32BITS(&use->rpu_pltime));
1362 }
1363 if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1364 sizeof(hbuf)))
1365 printf("%s/%u/%u", hbuf, use->rpu_uselen,
1366 use->rpu_keeplen);
1367 else
1368 printf("?/%u/%u", use->rpu_uselen,
1369 use->rpu_keeplen);
1370 /*(*/
1371 printf(")");
1372 }
1373 }
1374
1375 return;
1376
1377 trunc:
1378 fputs("[|icmp6]", stdout);
1379 }
1380
1381 #endif /* INET6 */
1382