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kernel - Close small race in kqueue
[dragonfly.git] / contrib / tcpdump / print-icmp6.c
blob75ff1ad6a0fe54a5850ea7a5a1564173d70b2105
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 1.85.2.1 2008-02-05 19:36:58 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 static struct tok icmp6_type_values[] = {
66 { ICMP6_DST_UNREACH, "destination unreachable"},
67 { ICMP6_PACKET_TOO_BIG, "packet too big"},
68 { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
69 { ICMP6_PARAM_PROB, "parameter problem"},
70 { ICMP6_ECHO_REQUEST, "echo request"},
71 { ICMP6_ECHO_REPLY, "echo reply"},
72 { MLD6_LISTENER_QUERY, "multicast listener query"},
73 { MLD6_LISTENER_REPORT, "multicast listener report"},
74 { MLD6_LISTENER_DONE, "multicast listener done"},
75 { ND_ROUTER_SOLICIT, "router solicitation"},
76 { ND_ROUTER_ADVERT, "router advertisement"},
77 { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
78 { ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
79 { ND_REDIRECT, "redirect"},
80 { ICMP6_ROUTER_RENUMBERING, "router renumbering"},
81 { IND_SOLICIT, "inverse neighbor solicitation"},
82 { IND_ADVERT, "inverse neighbor advertisement"},
83 { MLDV2_LISTENER_REPORT, "multicast listener report v2"},
84 { ICMP6_HADISCOV_REQUEST, "ha discovery request"},
85 { ICMP6_HADISCOV_REPLY, "ha discovery reply"},
86 { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
87 { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
88 { ICMP6_WRUREQUEST, "who-are-you request"},
89 { ICMP6_WRUREPLY, "who-are-you reply"},
90 { ICMP6_NI_QUERY, "node information query"},
91 { ICMP6_NI_REPLY, "node information reply"},
92 { MLD6_MTRACE, "mtrace message"},
93 { MLD6_MTRACE_RESP, "mtrace response"},
94 { 0, NULL }
95 };
96
97 static struct tok icmp6_dst_unreach_code_values[] = {
98 { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
99 { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
100 { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
101 { ICMP6_DST_UNREACH_ADDR, "unreachable address"},
102 { ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
103 { 0, NULL }
104 };
105
106 static struct tok icmp6_opt_pi_flag_values[] = {
107 { ND_OPT_PI_FLAG_ONLINK, "onlink" },
108 { ND_OPT_PI_FLAG_AUTO, "auto" },
109 { ND_OPT_PI_FLAG_ROUTER, "router" },
110 { 0, NULL }
111 };
112
113 static struct tok icmp6_opt_ra_flag_values[] = {
114 { ND_RA_FLAG_MANAGED, "managed" },
115 { ND_RA_FLAG_OTHER, "other stateful"},
116 { ND_RA_FLAG_HOME_AGENT, "home agent"},
117 { 0, NULL }
118 };
119
120 static struct tok icmp6_nd_na_flag_values[] = {
121 { ND_NA_FLAG_ROUTER, "router" },
122 { ND_NA_FLAG_SOLICITED, "solicited" },
123 { ND_NA_FLAG_OVERRIDE, "override" },
124 { 0, NULL }
125 };
126
127
128 static struct tok icmp6_opt_values[] = {
129 { ND_OPT_SOURCE_LINKADDR, "source link-address"},
130 { ND_OPT_TARGET_LINKADDR, "destination link-address"},
131 { ND_OPT_PREFIX_INFORMATION, "prefix info"},
132 { ND_OPT_REDIRECTED_HEADER, "redirected header"},
133 { ND_OPT_MTU, "mtu"},
134 { ND_OPT_ADVINTERVAL, "advertisement interval"},
135 { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
136 { ND_OPT_ROUTE_INFO, "route info"},
137 { 0, NULL }
138 };
139
140 /* mldv2 report types */
141 static struct tok mldv2report2str[] = {
142 { 1, "is_in" },
143 { 2, "is_ex" },
144 { 3, "to_in" },
145 { 4, "to_ex" },
146 { 5, "allow" },
147 { 6, "block" },
148 { 0, NULL }
149 };
150
151 static const char *
152 get_rtpref(u_int v)
153 {
154 static const char *rtpref_str[] = {
155 "medium", /* 00 */
156 "high", /* 01 */
157 "rsv", /* 10 */
158 "low" /* 11 */
159 };
160
161 return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
162 }
163
164 static const char *
165 get_lifetime(u_int32_t v)
166 {
167 static char buf[20];
168
169 if (v == (u_int32_t)~0UL)
170 return "infinity";
171 else {
172 snprintf(buf, sizeof(buf), "%u", v);
173 return buf;
174 }
175 }
176
177 static void
178 print_lladdr(const u_int8_t *p, size_t l)
179 {
180 const u_int8_t *ep, *q;
181
182 q = p;
183 ep = p + l;
184 while (l > 0 && q < ep) {
185 if (q > p)
186 printf(":");
187 printf("%02x", *q++);
188 l--;
189 }
190 }
191
192 static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
193 u_int len)
194 {
195 size_t i;
196 register const u_int16_t *sp;
197 u_int32_t sum;
198 union {
199 struct {
200 struct in6_addr ph_src;
201 struct in6_addr ph_dst;
202 u_int32_t ph_len;
203 u_int8_t ph_zero[3];
204 u_int8_t ph_nxt;
205 } ph;
206 u_int16_t pa[20];
207 } phu;
208
209 /* pseudo-header */
210 memset(&phu, 0, sizeof(phu));
211 phu.ph.ph_src = ip6->ip6_src;
212 phu.ph.ph_dst = ip6->ip6_dst;
213 phu.ph.ph_len = htonl(len);
214 phu.ph.ph_nxt = IPPROTO_ICMPV6;
215
216 sum = 0;
217 for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++)
218 sum += phu.pa[i];
219
220 sp = (const u_int16_t *)icp;
221
222 for (i = 0; i < (len & ~1); i += 2)
223 sum += *sp++;
224
225 if (len & 1)
226 sum += htons((*(const u_int8_t *)sp) << 8);
227
228 while (sum > 0xffff)
229 sum = (sum & 0xffff) + (sum >> 16);
230 sum = ~sum & 0xffff;
231
232 return (sum);
233 }
234
235 void
236 icmp6_print(const u_char *bp, u_int length, const u_char *bp2, int fragmented)
237 {
238 const struct icmp6_hdr *dp;
239 const struct ip6_hdr *ip;
240 const struct ip6_hdr *oip;
241 const struct udphdr *ouh;
242 int dport;
243 const u_char *ep;
244 u_int prot;
245
246 dp = (struct icmp6_hdr *)bp;
247 ip = (struct ip6_hdr *)bp2;
248 oip = (struct ip6_hdr *)(dp + 1);
249 /* 'ep' points to the end of available data. */
250 ep = snapend;
251
252 TCHECK(dp->icmp6_cksum);
253
254 if (vflag && !fragmented) {
255 int sum = dp->icmp6_cksum;
256
257 if (TTEST2(bp[0], length)) {
258 sum = icmp6_cksum(ip, dp, length);
259 if (sum != 0)
260 (void)printf("[bad icmp6 cksum %x!] ", sum);
261 else
262 (void)printf("[icmp6 sum ok] ");
263 }
264 }
265
266 printf("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type));
267
268 /* display cosmetics: print the packet length for printer that use the vflag now */
269 if (vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
270 dp->icmp6_type == ND_ROUTER_ADVERT ||
271 dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
272 dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
273 dp->icmp6_type == ND_REDIRECT ||
274 dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
275 dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
276 printf(", length %u", length);
277
278 switch (dp->icmp6_type) {
279 case ICMP6_DST_UNREACH:
280 TCHECK(oip->ip6_dst);
281 printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code));
282 switch (dp->icmp6_code) {
283
284 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
285 case ICMP6_DST_UNREACH_ADMIN:
286 case ICMP6_DST_UNREACH_ADDR:
287 printf(" %s",ip6addr_string(&oip->ip6_dst));
288 break;
289 case ICMP6_DST_UNREACH_BEYONDSCOPE:
290 printf(" %s, source address %s",
291 ip6addr_string(&oip->ip6_dst),
292 ip6addr_string(&oip->ip6_src));
293 break;
294 case ICMP6_DST_UNREACH_NOPORT:
295 if ((ouh = get_upperlayer((u_char *)oip, &prot))
296 == NULL)
297 goto trunc;
298
299 dport = EXTRACT_16BITS(&ouh->uh_dport);
300 switch (prot) {
301 case IPPROTO_TCP:
302 printf(", %s tcp port %s",
303 ip6addr_string(&oip->ip6_dst),
304 tcpport_string(dport));
305 break;
306 case IPPROTO_UDP:
307 printf(", %s udp port %s",
308 ip6addr_string(&oip->ip6_dst),
309 udpport_string(dport));
310 break;
311 default:
312 printf(", %s protocol %d port %d unreachable",
313 ip6addr_string(&oip->ip6_dst),
314 oip->ip6_nxt, dport);
315 break;
316 }
317 break;
318 default:
319 if (vflag <= 1) {
320 print_unknown_data(bp,"\n\t",length);
321 return;
322 }
323 break;
324 }
325 break;
326 case ICMP6_PACKET_TOO_BIG:
327 TCHECK(dp->icmp6_mtu);
328 printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu));
329 break;
330 case ICMP6_TIME_EXCEEDED:
331 TCHECK(oip->ip6_dst);
332 switch (dp->icmp6_code) {
333 case ICMP6_TIME_EXCEED_TRANSIT:
334 printf(" for %s",
335 ip6addr_string(&oip->ip6_dst));
336 break;
337 case ICMP6_TIME_EXCEED_REASSEMBLY:
338 printf(" (reassembly)");
339 break;
340 default:
341 printf(", unknown code (%u)", dp->icmp6_code);
342 break;
343 }
344 break;
345 case ICMP6_PARAM_PROB:
346 TCHECK(oip->ip6_dst);
347 switch (dp->icmp6_code) {
348 case ICMP6_PARAMPROB_HEADER:
349 printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
350 break;
351 case ICMP6_PARAMPROB_NEXTHEADER:
352 printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
353 break;
354 case ICMP6_PARAMPROB_OPTION:
355 printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
356 break;
357 default:
358 printf(", code-#%d",
359 dp->icmp6_code);
360 break;
361 }
362 break;
363 case ICMP6_ECHO_REQUEST:
364 case ICMP6_ECHO_REPLY:
365 TCHECK(dp->icmp6_seq);
366 printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq));
367 break;
368 case ICMP6_MEMBERSHIP_QUERY:
369 if (length == MLD_MINLEN) {
370 mld6_print((const u_char *)dp);
371 } else if (length >= MLDV2_MINLEN) {
372 printf("v2 ");
373 mldv2_query_print((const u_char *)dp, length);
374 } else {
375 printf(" unknown-version (len %u) ", length);
376 }
377 break;
378 case ICMP6_MEMBERSHIP_REPORT:
379 mld6_print((const u_char *)dp);
380 break;
381 case ICMP6_MEMBERSHIP_REDUCTION:
382 mld6_print((const u_char *)dp);
383 break;
384 case ND_ROUTER_SOLICIT:
385 #define RTSOLLEN 8
386 if (vflag) {
387 icmp6_opt_print((const u_char *)dp + RTSOLLEN,
388 length - RTSOLLEN);
389 }
390 break;
391 case ND_ROUTER_ADVERT:
392 #define RTADVLEN 16
393 if (vflag) {
394 struct nd_router_advert *p;
395
396 p = (struct nd_router_advert *)dp;
397 TCHECK(p->nd_ra_retransmit);
398 printf("\n\thop limit %u, Flags [%s]" \
399 ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
400 (u_int)p->nd_ra_curhoplimit,
401 bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
402 get_rtpref(p->nd_ra_flags_reserved),
403 EXTRACT_16BITS(&p->nd_ra_router_lifetime),
404 EXTRACT_32BITS(&p->nd_ra_reachable),
405 EXTRACT_32BITS(&p->nd_ra_retransmit));
406
407 icmp6_opt_print((const u_char *)dp + RTADVLEN,
408 length - RTADVLEN);
409 }
410 break;
411 case ND_NEIGHBOR_SOLICIT:
412 {
413 struct nd_neighbor_solicit *p;
414 p = (struct nd_neighbor_solicit *)dp;
415 TCHECK(p->nd_ns_target);
416 printf(", who has %s", ip6addr_string(&p->nd_ns_target));
417 if (vflag) {
418 #define NDSOLLEN 24
419 icmp6_opt_print((const u_char *)dp + NDSOLLEN,
420 length - NDSOLLEN);
421 }
422 }
423 break;
424 case ND_NEIGHBOR_ADVERT:
425 {
426 struct nd_neighbor_advert *p;
427
428 p = (struct nd_neighbor_advert *)dp;
429 TCHECK(p->nd_na_target);
430 printf(", tgt is %s",
431 ip6addr_string(&p->nd_na_target));
432 if (vflag) {
433 printf(", Flags [%s]",
434 bittok2str(icmp6_nd_na_flag_values,
435 "none",
436 EXTRACT_32BITS(&p->nd_na_flags_reserved)));
437 #define NDADVLEN 24
438 icmp6_opt_print((const u_char *)dp + NDADVLEN,
439 length - NDADVLEN);
440 #undef NDADVLEN
441 }
442 }
443 break;
444 case ND_REDIRECT:
445 #define RDR(i) ((struct nd_redirect *)(i))
446 TCHECK(RDR(dp)->nd_rd_dst);
447 printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst));
448 TCHECK(RDR(dp)->nd_rd_target);
449 printf(" to %s",
450 getname6((const u_char*)&RDR(dp)->nd_rd_target));
451 #define REDIRECTLEN 40
452 if (vflag) {
453 icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
454 length - REDIRECTLEN);
455 }
456 break;
457 #undef REDIRECTLEN
458 #undef RDR
459 case ICMP6_ROUTER_RENUMBERING:
460 icmp6_rrenum_print(bp, ep);
461 break;
462 case ICMP6_NI_QUERY:
463 case ICMP6_NI_REPLY:
464 icmp6_nodeinfo_print(length, bp, ep);
465 break;
466 case IND_SOLICIT:
467 case IND_ADVERT:
468 break;
469 case ICMP6_V2_MEMBERSHIP_REPORT:
470 mldv2_report_print((const u_char *) dp, length);
471 break;
472 case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
473 case ICMP6_HADISCOV_REQUEST:
474 TCHECK(dp->icmp6_data16[0]);
475 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
476 break;
477 case ICMP6_HADISCOV_REPLY:
478 if (vflag) {
479 struct in6_addr *in6;
480 u_char *cp;
481
482 TCHECK(dp->icmp6_data16[0]);
483 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
484 cp = (u_char *)dp + length;
485 in6 = (struct in6_addr *)(dp + 1);
486 for (; (u_char *)in6 < cp; in6++) {
487 TCHECK(*in6);
488 printf(", %s", ip6addr_string(in6));
489 }
490 }
491 break;
492 case ICMP6_MOBILEPREFIX_ADVERT:
493 if (vflag) {
494 TCHECK(dp->icmp6_data16[0]);
495 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
496 if (dp->icmp6_data16[1] & 0xc0)
497 printf(" ");
498 if (dp->icmp6_data16[1] & 0x80)
499 printf("M");
500 if (dp->icmp6_data16[1] & 0x40)
501 printf("O");
502 #define MPADVLEN 8
503 icmp6_opt_print((const u_char *)dp + MPADVLEN,
504 length - MPADVLEN);
505 }
506 break;
507 default:
508 printf(", length %u", length);
509 if (vflag <= 1)
510 print_unknown_data(bp,"\n\t", length);
511 return;
512 }
513 if (!vflag)
514 printf(", length %u", length);
515 return;
516 trunc:
517 fputs("[|icmp6]", stdout);
518 }
519
520 static struct udphdr *
521 get_upperlayer(u_char *bp, u_int *prot)
522 {
523 const u_char *ep;
524 struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
525 struct udphdr *uh;
526 struct ip6_hbh *hbh;
527 struct ip6_frag *fragh;
528 struct ah *ah;
529 u_int nh;
530 int hlen;
531
532 /* 'ep' points to the end of available data. */
533 ep = snapend;
534
535 if (!TTEST(ip6->ip6_nxt))
536 return NULL;
537
538 nh = ip6->ip6_nxt;
539 hlen = sizeof(struct ip6_hdr);
540
541 while (bp < ep) {
542 bp += hlen;
543
544 switch(nh) {
545 case IPPROTO_UDP:
546 case IPPROTO_TCP:
547 uh = (struct udphdr *)bp;
548 if (TTEST(uh->uh_dport)) {
549 *prot = nh;
550 return(uh);
551 }
552 else
553 return(NULL);
554 /* NOTREACHED */
555
556 case IPPROTO_HOPOPTS:
557 case IPPROTO_DSTOPTS:
558 case IPPROTO_ROUTING:
559 hbh = (struct ip6_hbh *)bp;
560 if (!TTEST(hbh->ip6h_len))
561 return(NULL);
562 nh = hbh->ip6h_nxt;
563 hlen = (hbh->ip6h_len + 1) << 3;
564 break;
565
566 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
567 fragh = (struct ip6_frag *)bp;
568 if (!TTEST(fragh->ip6f_offlg))
569 return(NULL);
570 /* fragments with non-zero offset are meaningless */
571 if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
572 return(NULL);
573 nh = fragh->ip6f_nxt;
574 hlen = sizeof(struct ip6_frag);
575 break;
576
577 case IPPROTO_AH:
578 ah = (struct ah *)bp;
579 if (!TTEST(ah->ah_len))
580 return(NULL);
581 nh = ah->ah_nxt;
582 hlen = (ah->ah_len + 2) << 2;
583 break;
584
585 default: /* unknown or undecodable header */
586 *prot = nh; /* meaningless, but set here anyway */
587 return(NULL);
588 }
589 }
590
591 return(NULL); /* should be notreached, though */
592 }
593
594 static void
595 icmp6_opt_print(const u_char *bp, int resid)
596 {
597 const struct nd_opt_hdr *op;
598 const struct nd_opt_hdr *opl; /* why there's no struct? */
599 const struct nd_opt_prefix_info *opp;
600 const struct icmp6_opts_redirect *opr;
601 const struct nd_opt_mtu *opm;
602 const struct nd_opt_advinterval *opa;
603 const struct nd_opt_homeagent_info *oph;
604 const struct nd_opt_route_info *opri;
605 const u_char *cp, *ep;
606 struct in6_addr in6, *in6p;
607 size_t l;
608
609 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
610
611 cp = bp;
612 /* 'ep' points to the end of available data. */
613 ep = snapend;
614
615 while (cp < ep) {
616 op = (struct nd_opt_hdr *)cp;
617
618 ECHECK(op->nd_opt_len);
619 if (resid <= 0)
620 return;
621 if (op->nd_opt_len == 0)
622 goto trunc;
623 if (cp + (op->nd_opt_len << 3) > ep)
624 goto trunc;
625
626 printf("\n\t %s option (%u), length %u (%u): ",
627 tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
628 op->nd_opt_type,
629 op->nd_opt_len << 3,
630 op->nd_opt_len);
631
632 switch (op->nd_opt_type) {
633 case ND_OPT_SOURCE_LINKADDR:
634 opl = (struct nd_opt_hdr *)op;
635 l = (op->nd_opt_len << 3) - 2;
636 print_lladdr(cp + 2, l);
637 break;
638 case ND_OPT_TARGET_LINKADDR:
639 opl = (struct nd_opt_hdr *)op;
640 l = (op->nd_opt_len << 3) - 2;
641 print_lladdr(cp + 2, l);
642 break;
643 case ND_OPT_PREFIX_INFORMATION:
644 opp = (struct nd_opt_prefix_info *)op;
645 TCHECK(opp->nd_opt_pi_prefix);
646 printf("%s/%u%s, Flags [%s], valid time %ss",
647 ip6addr_string(&opp->nd_opt_pi_prefix),
648 opp->nd_opt_pi_prefix_len,
649 (op->nd_opt_len != 4) ? "badlen" : "",
650 bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
651 get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)));
652 printf(", pref. time %ss", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)));
653 break;
654 case ND_OPT_REDIRECTED_HEADER:
655 opr = (struct icmp6_opts_redirect *)op;
656 print_unknown_data(bp,"\n\t ",op->nd_opt_len<<3);
657 /* xxx */
658 break;
659 case ND_OPT_MTU:
660 opm = (struct nd_opt_mtu *)op;
661 TCHECK(opm->nd_opt_mtu_mtu);
662 printf(" %u%s",
663 EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
664 (op->nd_opt_len != 1) ? "bad option length" : "" );
665 break;
666 case ND_OPT_ADVINTERVAL:
667 opa = (struct nd_opt_advinterval *)op;
668 TCHECK(opa->nd_opt_adv_interval);
669 printf(" %us", EXTRACT_32BITS(&opa->nd_opt_adv_interval));
670 break;
671 case ND_OPT_HOMEAGENT_INFO:
672 oph = (struct nd_opt_homeagent_info *)op;
673 TCHECK(oph->nd_opt_hai_lifetime);
674 printf(" preference %u, lifetime %u",
675 EXTRACT_16BITS(&oph->nd_opt_hai_preference),
676 EXTRACT_16BITS(&oph->nd_opt_hai_lifetime));
677 break;
678 case ND_OPT_ROUTE_INFO:
679 opri = (struct nd_opt_route_info *)op;
680 TCHECK(opri->nd_opt_rti_lifetime);
681 memset(&in6, 0, sizeof(in6));
682 in6p = (struct in6_addr *)(opri + 1);
683 switch (op->nd_opt_len) {
684 case 1:
685 break;
686 case 2:
687 TCHECK2(*in6p, 8);
688 memcpy(&in6, opri + 1, 8);
689 break;
690 case 3:
691 TCHECK(*in6p);
692 memcpy(&in6, opri + 1, sizeof(in6));
693 break;
694 default:
695 goto trunc;
696 }
697 printf(" %s/%u", ip6addr_string(&in6),
698 opri->nd_opt_rti_prefixlen);
699 printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
700 printf(", lifetime=%s",
701 get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)));
702 break;
703 default:
704 if (vflag <= 1) {
705 print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
706 return;
707 }
708 break;
709 }
710 /* do we want to see an additional hexdump ? */
711 if (vflag> 1)
712 print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
713
714 cp += op->nd_opt_len << 3;
715 resid -= op->nd_opt_len << 3;
716 }
717 return;
718
719 trunc:
720 fputs("[ndp opt]", stdout);
721 return;
722 #undef ECHECK
723 }
724
725 static void
726 mld6_print(const u_char *bp)
727 {
728 struct mld6_hdr *mp = (struct mld6_hdr *)bp;
729 const u_char *ep;
730
731 /* 'ep' points to the end of available data. */
732 ep = snapend;
733
734 if ((u_char *)mp + sizeof(*mp) > ep)
735 return;
736
737 printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay));
738 printf("addr: %s", ip6addr_string(&mp->mld6_addr));
739 }
740
741 static void
742 mldv2_report_print(const u_char *bp, u_int len)
743 {
744 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
745 u_int group, nsrcs, ngroups;
746 u_int i, j;
747
748 /* Minimum len is 8 */
749 if (len < 8) {
750 printf(" [invalid len %d]", len);
751 return;
752 }
753
754 TCHECK(icp->icmp6_data16[1]);
755 ngroups = ntohs(icp->icmp6_data16[1]);
756 printf(", %d group record(s)", ngroups);
757 if (vflag > 0) {
758 /* Print the group records */
759 group = 8;
760 for (i = 0; i < ngroups; i++) {
761 /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
762 if (len < group + 20) {
763 printf(" [invalid number of groups]");
764 return;
765 }
766 TCHECK2(bp[group + 4], sizeof(struct in6_addr));
767 printf(" [gaddr %s", ip6addr_string(&bp[group + 4]));
768 printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]",
769 bp[group]));
770 nsrcs = (bp[group + 2] << 8) + bp[group + 3];
771 /* Check the number of sources and print them */
772 if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
773 printf(" [invalid number of sources %d]", nsrcs);
774 return;
775 }
776 if (vflag == 1)
777 printf(", %d source(s)", nsrcs);
778 else {
779 /* Print the sources */
780 (void)printf(" {");
781 for (j = 0; j < nsrcs; j++) {
782 TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
783 sizeof(struct in6_addr));
784 printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)]));
785 }
786 (void)printf(" }");
787 }
788 /* Next group record */
789 group += 20 + nsrcs * sizeof(struct in6_addr);
790 printf("]");
791 }
792 }
793 return;
794 trunc:
795 (void)printf("[|icmp6]");
796 return;
797 }
798
799 static void
800 mldv2_query_print(const u_char *bp, u_int len)
801 {
802 struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
803 u_int mrc;
804 int mrt, qqi;
805 u_int nsrcs;
806 register u_int i;
807
808 /* Minimum len is 28 */
809 if (len < 28) {
810 printf(" [invalid len %d]", len);
811 return;
812 }
813 TCHECK(icp->icmp6_data16[0]);
814 mrc = ntohs(icp->icmp6_data16[0]);
815 if (mrc < 32768) {
816 mrt = mrc;
817 } else {
818 mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
819 }
820 if (vflag) {
821 (void)printf(" [max resp delay=%d]", mrt);
822 }
823 TCHECK2(bp[8], sizeof(struct in6_addr));
824 printf(" [gaddr %s", ip6addr_string(&bp[8]));
825
826 if (vflag) {
827 TCHECK(bp[25]);
828 if (bp[24] & 0x08) {
829 printf(" sflag");
830 }
831 if (bp[24] & 0x07) {
832 printf(" robustness=%d", bp[24] & 0x07);
833 }
834 if (bp[25] < 128) {
835 qqi = bp[25];
836 } else {
837 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
838 }
839 printf(" qqi=%d", qqi);
840 }
841
842 TCHECK2(bp[26], 2);
843 nsrcs = ntohs(*(u_short *)&bp[26]);
844 if (nsrcs > 0) {
845 if (len < 28 + nsrcs * sizeof(struct in6_addr))
846 printf(" [invalid number of sources]");
847 else if (vflag > 1) {
848 printf(" {");
849 for (i = 0; i < nsrcs; i++) {
850 TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
851 sizeof(struct in6_addr));
852 printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)]));
853 }
854 printf(" }");
855 } else
856 printf(", %d source(s)", nsrcs);
857 }
858 printf("]");
859 return;
860 trunc:
861 (void)printf("[|icmp6]");
862 return;
863 }
864
865 void
866 dnsname_print(const u_char *cp, const u_char *ep)
867 {
868 int i;
869
870 /* DNS name decoding - no decompression */
871 printf(", \"");
872 while (cp < ep) {
873 i = *cp++;
874 if (i) {
875 if (i > ep - cp) {
876 printf("???");
877 break;
878 }
879 while (i-- && cp < ep) {
880 safeputchar(*cp);
881 cp++;
882 }
883 if (cp + 1 < ep && *cp)
884 printf(".");
885 } else {
886 if (cp == ep) {
887 /* FQDN */
888 printf(".");
889 } else if (cp + 1 == ep && *cp == '\0') {
890 /* truncated */
891 } else {
892 /* invalid */
893 printf("???");
894 }
895 break;
896 }
897 }
898 printf("\"");
899 }
900
901 static void
902 icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep)
903 {
904 struct icmp6_nodeinfo *ni6;
905 struct icmp6_hdr *dp;
906 const u_char *cp;
907 size_t siz, i;
908 int needcomma;
909
910 if (ep < bp)
911 return;
912 dp = (struct icmp6_hdr *)bp;
913 ni6 = (struct icmp6_nodeinfo *)bp;
914 siz = ep - bp;
915
916 switch (ni6->ni_type) {
917 case ICMP6_NI_QUERY:
918 if (siz == sizeof(*dp) + 4) {
919 /* KAME who-are-you */
920 printf(" who-are-you request");
921 break;
922 }
923 printf(" node information query");
924
925 TCHECK2(*dp, sizeof(*ni6));
926 ni6 = (struct icmp6_nodeinfo *)dp;
927 printf(" ("); /*)*/
928 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
929 case NI_QTYPE_NOOP:
930 printf("noop");
931 break;
932 case NI_QTYPE_SUPTYPES:
933 printf("supported qtypes");
934 i = EXTRACT_16BITS(&ni6->ni_flags);
935 if (i)
936 printf(" [%s]", (i & 0x01) ? "C" : "");
937 break;
938 break;
939 case NI_QTYPE_FQDN:
940 printf("DNS name");
941 break;
942 case NI_QTYPE_NODEADDR:
943 printf("node addresses");
944 i = ni6->ni_flags;
945 if (!i)
946 break;
947 /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
948 printf(" [%s%s%s%s%s%s]",
949 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
950 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
951 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
952 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
953 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
954 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
955 break;
956 default:
957 printf("unknown");
958 break;
959 }
960
961 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
962 ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
963 if (siz != sizeof(*ni6))
964 if (vflag)
965 printf(", invalid len");
966 /*(*/
967 printf(")");
968 break;
969 }
970
971
972 /* XXX backward compat, icmp-name-lookup-03 */
973 if (siz == sizeof(*ni6)) {
974 printf(", 03 draft");
975 /*(*/
976 printf(")");
977 break;
978 }
979
980 switch (ni6->ni_code) {
981 case ICMP6_NI_SUBJ_IPV6:
982 if (!TTEST2(*dp,
983 sizeof(*ni6) + sizeof(struct in6_addr)))
984 break;
985 if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
986 if (vflag)
987 printf(", invalid subject len");
988 break;
989 }
990 printf(", subject=%s",
991 getname6((const u_char *)(ni6 + 1)));
992 break;
993 case ICMP6_NI_SUBJ_FQDN:
994 printf(", subject=DNS name");
995 cp = (const u_char *)(ni6 + 1);
996 if (cp[0] == ep - cp - 1) {
997 /* icmp-name-lookup-03, pascal string */
998 if (vflag)
999 printf(", 03 draft");
1000 cp++;
1001 printf(", \"");
1002 while (cp < ep) {
1003 safeputchar(*cp);
1004 cp++;
1005 }
1006 printf("\"");
1007 } else
1008 dnsname_print(cp, ep);
1009 break;
1010 case ICMP6_NI_SUBJ_IPV4:
1011 if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1012 break;
1013 if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1014 if (vflag)
1015 printf(", invalid subject len");
1016 break;
1017 }
1018 printf(", subject=%s",
1019 getname((const u_char *)(ni6 + 1)));
1020 break;
1021 default:
1022 printf(", unknown subject");
1023 break;
1024 }
1025
1026 /*(*/
1027 printf(")");
1028 break;
1029
1030 case ICMP6_NI_REPLY:
1031 if (icmp6len > siz) {
1032 printf("[|icmp6: node information reply]");
1033 break;
1034 }
1035
1036 needcomma = 0;
1037
1038 ni6 = (struct icmp6_nodeinfo *)dp;
1039 printf(" node information reply");
1040 printf(" ("); /*)*/
1041 switch (ni6->ni_code) {
1042 case ICMP6_NI_SUCCESS:
1043 if (vflag) {
1044 printf("success");
1045 needcomma++;
1046 }
1047 break;
1048 case ICMP6_NI_REFUSED:
1049 printf("refused");
1050 needcomma++;
1051 if (siz != sizeof(*ni6))
1052 if (vflag)
1053 printf(", invalid length");
1054 break;
1055 case ICMP6_NI_UNKNOWN:
1056 printf("unknown");
1057 needcomma++;
1058 if (siz != sizeof(*ni6))
1059 if (vflag)
1060 printf(", invalid length");
1061 break;
1062 }
1063
1064 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1065 /*(*/
1066 printf(")");
1067 break;
1068 }
1069
1070 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1071 case NI_QTYPE_NOOP:
1072 if (needcomma)
1073 printf(", ");
1074 printf("noop");
1075 if (siz != sizeof(*ni6))
1076 if (vflag)
1077 printf(", invalid length");
1078 break;
1079 case NI_QTYPE_SUPTYPES:
1080 if (needcomma)
1081 printf(", ");
1082 printf("supported qtypes");
1083 i = EXTRACT_16BITS(&ni6->ni_flags);
1084 if (i)
1085 printf(" [%s]", (i & 0x01) ? "C" : "");
1086 break;
1087 case NI_QTYPE_FQDN:
1088 if (needcomma)
1089 printf(", ");
1090 printf("DNS name");
1091 cp = (const u_char *)(ni6 + 1) + 4;
1092 if (cp[0] == ep - cp - 1) {
1093 /* icmp-name-lookup-03, pascal string */
1094 if (vflag)
1095 printf(", 03 draft");
1096 cp++;
1097 printf(", \"");
1098 while (cp < ep) {
1099 safeputchar(*cp);
1100 cp++;
1101 }
1102 printf("\"");
1103 } else
1104 dnsname_print(cp, ep);
1105 if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1106 printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
1107 break;
1108 case NI_QTYPE_NODEADDR:
1109 if (needcomma)
1110 printf(", ");
1111 printf("node addresses");
1112 i = sizeof(*ni6);
1113 while (i < siz) {
1114 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1115 break;
1116 printf(" %s", getname6(bp + i));
1117 i += sizeof(struct in6_addr);
1118 printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i));
1119 i += sizeof(int32_t);
1120 }
1121 i = ni6->ni_flags;
1122 if (!i)
1123 break;
1124 printf(" [%s%s%s%s%s%s%s]",
1125 (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1126 (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1127 (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1128 (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1129 (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1130 (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1131 (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1132 break;
1133 default:
1134 if (needcomma)
1135 printf(", ");
1136 printf("unknown");
1137 break;
1138 }
1139
1140 /*(*/
1141 printf(")");
1142 break;
1143 }
1144 return;
1145
1146 trunc:
1147 fputs("[|icmp6]", stdout);
1148 }
1149
1150 static void
1151 icmp6_rrenum_print(const u_char *bp, const u_char *ep)
1152 {
1153 struct icmp6_router_renum *rr6;
1154 const char *cp;
1155 struct rr_pco_match *match;
1156 struct rr_pco_use *use;
1157 char hbuf[NI_MAXHOST];
1158 int n;
1159
1160 if (ep < bp)
1161 return;
1162 rr6 = (struct icmp6_router_renum *)bp;
1163 cp = (const char *)(rr6 + 1);
1164
1165 TCHECK(rr6->rr_reserved);
1166 switch (rr6->rr_code) {
1167 case ICMP6_ROUTER_RENUMBERING_COMMAND:
1168 printf("router renum: command");
1169 break;
1170 case ICMP6_ROUTER_RENUMBERING_RESULT:
1171 printf("router renum: result");
1172 break;
1173 case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1174 printf("router renum: sequence number reset");
1175 break;
1176 default:
1177 printf("router renum: code-#%d", rr6->rr_code);
1178 break;
1179 }
1180
1181 printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum));
1182
1183 if (vflag) {
1184 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1185 printf("["); /*]*/
1186 if (rr6->rr_flags) {
1187 printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1188 F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1189 F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1190 F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1191 F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1192 }
1193 printf("seg=%u,", rr6->rr_segnum);
1194 printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay));
1195 if (rr6->rr_reserved)
1196 printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved));
1197 /*[*/
1198 printf("]");
1199 #undef F
1200 }
1201
1202 if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1203 match = (struct rr_pco_match *)cp;
1204 cp = (const char *)(match + 1);
1205
1206 TCHECK(match->rpm_prefix);
1207
1208 if (vflag > 1)
1209 printf("\n\t");
1210 else
1211 printf(" ");
1212 printf("match("); /*)*/
1213 switch (match->rpm_code) {
1214 case RPM_PCO_ADD: printf("add"); break;
1215 case RPM_PCO_CHANGE: printf("change"); break;
1216 case RPM_PCO_SETGLOBAL: printf("setglobal"); break;
1217 default: printf("#%u", match->rpm_code); break;
1218 }
1219
1220 if (vflag) {
1221 printf(",ord=%u", match->rpm_ordinal);
1222 printf(",min=%u", match->rpm_minlen);
1223 printf(",max=%u", match->rpm_maxlen);
1224 }
1225 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1226 printf(",%s/%u", hbuf, match->rpm_matchlen);
1227 else
1228 printf(",?/%u", match->rpm_matchlen);
1229 /*(*/
1230 printf(")");
1231
1232 n = match->rpm_len - 3;
1233 if (n % 4)
1234 goto trunc;
1235 n /= 4;
1236 while (n-- > 0) {
1237 use = (struct rr_pco_use *)cp;
1238 cp = (const char *)(use + 1);
1239
1240 TCHECK(use->rpu_prefix);
1241
1242 if (vflag > 1)
1243 printf("\n\t");
1244 else
1245 printf(" ");
1246 printf("use("); /*)*/
1247 if (use->rpu_flags) {
1248 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1249 printf("%s%s,",
1250 F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1251 F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
1252 #undef F
1253 }
1254 if (vflag) {
1255 printf("mask=0x%x,", use->rpu_ramask);
1256 printf("raflags=0x%x,", use->rpu_raflags);
1257 if (~use->rpu_vltime == 0)
1258 printf("vltime=infty,");
1259 else
1260 printf("vltime=%u,",
1261 EXTRACT_32BITS(&use->rpu_vltime));
1262 if (~use->rpu_pltime == 0)
1263 printf("pltime=infty,");
1264 else
1265 printf("pltime=%u,",
1266 EXTRACT_32BITS(&use->rpu_pltime));
1267 }
1268 if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1269 sizeof(hbuf)))
1270 printf("%s/%u/%u", hbuf, use->rpu_uselen,
1271 use->rpu_keeplen);
1272 else
1273 printf("?/%u/%u", use->rpu_uselen,
1274 use->rpu_keeplen);
1275 /*(*/
1276 printf(")");
1277 }
1278 }
1279
1280 return;
1281
1282 trunc:
1283 fputs("[|icmp6]", stdout);
1284 }
1285
1286 #endif /* INET6 */
DragonFly BSD