c5039247af11595abce1966de086cfd07121461f
[dragonfly.git] / contrib / tcpdump-3.9 / print-icmp6.c
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 1.79.2.6 2005/09/05 09:29:28 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 ==
270                       ND_ROUTER_SOLICIT ||
271                       ND_ROUTER_ADVERT ||
272                       ND_NEIGHBOR_ADVERT ||
273                       ND_NEIGHBOR_SOLICIT ||
274                       ND_REDIRECT ||
275                       ICMP6_HADISCOV_REPLY ||
276                       ICMP6_MOBILEPREFIX_ADVERT ))
277             printf(", length %u", length);
278                       
279         switch (dp->icmp6_type) {
280         case ICMP6_DST_UNREACH:
281                 TCHECK(oip->ip6_dst);
282                 printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code));
283                 switch (dp->icmp6_code) {
284
285                 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
286                 case ICMP6_DST_UNREACH_ADMIN:
287                 case ICMP6_DST_UNREACH_ADDR:
288                         printf(" %s",ip6addr_string(&oip->ip6_dst));
289                         break;
290                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
291                         printf(" %s, source address %s",
292                                ip6addr_string(&oip->ip6_dst),
293                                ip6addr_string(&oip->ip6_src));
294                         break;
295                 case ICMP6_DST_UNREACH_NOPORT:
296                         if ((ouh = get_upperlayer((u_char *)oip, &prot))
297                             == NULL)
298                                 goto trunc;
299
300                         dport = EXTRACT_16BITS(&ouh->uh_dport);
301                         switch (prot) {
302                         case IPPROTO_TCP:
303                                 printf(", %s tcp port %s",
304                                         ip6addr_string(&oip->ip6_dst),
305                                         tcpport_string(dport));
306                                 break;
307                         case IPPROTO_UDP:
308                                 printf(", %s udp port %s",
309                                         ip6addr_string(&oip->ip6_dst),
310                                         udpport_string(dport));
311                                 break;
312                         default:
313                                 printf(", %s protocol %d port %d unreachable",
314                                         ip6addr_string(&oip->ip6_dst),
315                                         oip->ip6_nxt, dport);
316                                 break;
317                         }
318                         break;
319                 default:
320                     if (vflag <= 1) {
321                             print_unknown_data(bp,"\n\t",length);
322                             return;
323                     }
324                     break;
325                 }
326                 break;
327         case ICMP6_PACKET_TOO_BIG:
328                 TCHECK(dp->icmp6_mtu);
329                 printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu));
330                 break;
331         case ICMP6_TIME_EXCEEDED:
332                 TCHECK(oip->ip6_dst);
333                 switch (dp->icmp6_code) {
334                 case ICMP6_TIME_EXCEED_TRANSIT:
335                         printf(" for %s",
336                                 ip6addr_string(&oip->ip6_dst));
337                         break;
338                 case ICMP6_TIME_EXCEED_REASSEMBLY:
339                         printf(" (reassembly)");
340                         break;
341                 default:
342                         printf(", unknown code (%u)", dp->icmp6_code);
343                         break;
344                 }
345                 break;
346         case ICMP6_PARAM_PROB:
347                 TCHECK(oip->ip6_dst);
348                 switch (dp->icmp6_code) {
349                 case ICMP6_PARAMPROB_HEADER:
350                         printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
351                         break;
352                 case ICMP6_PARAMPROB_NEXTHEADER:
353                         printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
354                         break;
355                 case ICMP6_PARAMPROB_OPTION:
356                         printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
357                         break;
358                 default:
359                         printf(", code-#%d",
360                                dp->icmp6_code);
361                         break;
362                 }
363                 break;
364         case ICMP6_ECHO_REQUEST:
365         case ICMP6_ECHO_REPLY:
366                 TCHECK(dp->icmp6_seq);
367                 printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq));
368                 break;
369         case ICMP6_MEMBERSHIP_QUERY:
370                 if (length == MLD_MINLEN) {
371                         mld6_print((const u_char *)dp);
372                 } else if (length >= MLDV2_MINLEN) {
373                         printf("v2 ");
374                         mldv2_query_print((const u_char *)dp, length);
375                 } else {
376                         printf(" unknown-version (len %u) ", length);
377                 }
378                 break;
379         case ICMP6_MEMBERSHIP_REPORT:
380                 mld6_print((const u_char *)dp);
381                 break;
382         case ICMP6_MEMBERSHIP_REDUCTION:
383                 mld6_print((const u_char *)dp);
384                 break;
385         case ND_ROUTER_SOLICIT:
386 #define RTSOLLEN 8
387                 if (vflag) {
388                         icmp6_opt_print((const u_char *)dp + RTSOLLEN,
389                                         length - RTSOLLEN);
390                 }
391                 break;
392         case ND_ROUTER_ADVERT:
393 #define RTADVLEN 16
394                 if (vflag) {
395                         struct nd_router_advert *p;
396
397                         p = (struct nd_router_advert *)dp;
398                         TCHECK(p->nd_ra_retransmit);
399                         printf("\n\thop limit %u, Flags [%s]" \
400                                ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
401                                (u_int)p->nd_ra_curhoplimit,
402                                bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
403                                get_rtpref(p->nd_ra_flags_reserved),
404                                EXTRACT_16BITS(&p->nd_ra_router_lifetime),
405                                EXTRACT_32BITS(&p->nd_ra_reachable),
406                                EXTRACT_32BITS(&p->nd_ra_retransmit));
407
408                         icmp6_opt_print((const u_char *)dp + RTADVLEN,
409                                         length - RTADVLEN);
410                 }
411                 break;
412         case ND_NEIGHBOR_SOLICIT:
413             {
414                 struct nd_neighbor_solicit *p;
415                 p = (struct nd_neighbor_solicit *)dp;
416                 TCHECK(p->nd_ns_target);
417                 printf(", who has %s", ip6addr_string(&p->nd_ns_target));
418                 if (vflag) {
419 #define NDSOLLEN 24
420                         icmp6_opt_print((const u_char *)dp + NDSOLLEN,
421                                         length - NDSOLLEN);
422                 }
423             }
424                 break;
425         case ND_NEIGHBOR_ADVERT:
426             {
427                 struct nd_neighbor_advert *p;
428
429                 p = (struct nd_neighbor_advert *)dp;
430                 TCHECK(p->nd_na_target);
431                 printf(", tgt is %s",
432                         ip6addr_string(&p->nd_na_target));
433                 if (vflag) {
434                         printf(", Flags [%s]",
435                                bittok2str(icmp6_nd_na_flag_values,
436                                           "none",
437                                           EXTRACT_32BITS(&p->nd_na_flags_reserved)));
438 #define NDADVLEN 24
439                         icmp6_opt_print((const u_char *)dp + NDADVLEN,
440                                         length - NDADVLEN);
441 #undef NDADVLEN
442                 }
443             }
444                 break;
445         case ND_REDIRECT:
446 #define RDR(i) ((struct nd_redirect *)(i))
447                 TCHECK(RDR(dp)->nd_rd_dst);
448                 printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst));
449                 TCHECK(RDR(dp)->nd_rd_target);
450                 printf(" to %s",
451                     getname6((const u_char*)&RDR(dp)->nd_rd_target));
452 #define REDIRECTLEN 40
453                 if (vflag) {
454                         icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
455                                         length - REDIRECTLEN);
456                 }
457                 break;
458 #undef REDIRECTLEN
459 #undef RDR
460         case ICMP6_ROUTER_RENUMBERING:
461                 icmp6_rrenum_print(bp, ep);
462                 break;
463         case ICMP6_NI_QUERY:
464         case ICMP6_NI_REPLY:
465                 icmp6_nodeinfo_print(length, bp, ep);
466                 break;
467         case IND_SOLICIT:
468         case IND_ADVERT:
469                 break;
470         case ICMP6_V2_MEMBERSHIP_REPORT:
471                 mldv2_report_print((const u_char *) dp, length);
472                 break;
473         case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
474         case ICMP6_HADISCOV_REQUEST:
475                 TCHECK(dp->icmp6_data16[0]);
476                 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
477                 break;
478         case ICMP6_HADISCOV_REPLY:
479                 if (vflag) {
480                         struct in6_addr *in6;
481                         u_char *cp;
482
483                         TCHECK(dp->icmp6_data16[0]);
484                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
485                         cp = (u_char *)dp + length;
486                         in6 = (struct in6_addr *)(dp + 1);
487                         for (; (u_char *)in6 < cp; in6++) {
488                                 TCHECK(*in6);
489                                 printf(", %s", ip6addr_string(in6));
490                         }
491                 }
492                 break;
493         case ICMP6_MOBILEPREFIX_ADVERT:
494                 if (vflag) {
495                         TCHECK(dp->icmp6_data16[0]);
496                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
497                         if (dp->icmp6_data16[1] & 0xc0)
498                                 printf(" ");
499                         if (dp->icmp6_data16[1] & 0x80)
500                                 printf("M");
501                         if (dp->icmp6_data16[1] & 0x40)
502                                 printf("O");
503 #define MPADVLEN 8
504                         icmp6_opt_print((const u_char *)dp + MPADVLEN,
505                                         length - MPADVLEN);
506                 }
507                 break;
508         default:
509                 printf(", length %u", length);
510                 if (vflag <= 1)
511                     print_unknown_data(bp,"\n\t", length);
512                 return;
513         }
514         if (!vflag)
515             printf(", length %u", length); 
516         return;
517 trunc:
518         fputs("[|icmp6]", stdout);
519 }
520
521 static struct udphdr *
522 get_upperlayer(u_char *bp, u_int *prot)
523 {
524         const u_char *ep;
525         struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
526         struct udphdr *uh;
527         struct ip6_hbh *hbh;
528         struct ip6_frag *fragh;
529         struct ah *ah;
530         u_int nh;
531         int hlen;
532
533         /* 'ep' points to the end of available data. */
534         ep = snapend;
535
536         if (!TTEST(ip6->ip6_nxt))
537                 return NULL;
538
539         nh = ip6->ip6_nxt;
540         hlen = sizeof(struct ip6_hdr);
541
542         while (bp < ep) {
543                 bp += hlen;
544
545                 switch(nh) {
546                 case IPPROTO_UDP:
547                 case IPPROTO_TCP:
548                         uh = (struct udphdr *)bp;
549                         if (TTEST(uh->uh_dport)) {
550                                 *prot = nh;
551                                 return(uh);
552                         }
553                         else
554                                 return(NULL);
555                         /* NOTREACHED */
556
557                 case IPPROTO_HOPOPTS:
558                 case IPPROTO_DSTOPTS:
559                 case IPPROTO_ROUTING:
560                         hbh = (struct ip6_hbh *)bp;
561                         if (!TTEST(hbh->ip6h_len))
562                                 return(NULL);
563                         nh = hbh->ip6h_nxt;
564                         hlen = (hbh->ip6h_len + 1) << 3;
565                         break;
566
567                 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
568                         fragh = (struct ip6_frag *)bp;
569                         if (!TTEST(fragh->ip6f_offlg))
570                                 return(NULL);
571                         /* fragments with non-zero offset are meaningless */
572                         if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
573                                 return(NULL);
574                         nh = fragh->ip6f_nxt;
575                         hlen = sizeof(struct ip6_frag);
576                         break;
577
578                 case IPPROTO_AH:
579                         ah = (struct ah *)bp;
580                         if (!TTEST(ah->ah_len))
581                                 return(NULL);
582                         nh = ah->ah_nxt;
583                         hlen = (ah->ah_len + 2) << 2;
584                         break;
585
586                 default:        /* unknown or undecodable header */
587                         *prot = nh; /* meaningless, but set here anyway */
588                         return(NULL);
589                 }
590         }
591
592         return(NULL);           /* should be notreached, though */
593 }
594
595 static void
596 icmp6_opt_print(const u_char *bp, int resid)
597 {
598         const struct nd_opt_hdr *op;
599         const struct nd_opt_hdr *opl;   /* why there's no struct? */
600         const struct nd_opt_prefix_info *opp;
601         const struct icmp6_opts_redirect *opr;
602         const struct nd_opt_mtu *opm;
603         const struct nd_opt_advinterval *opa;
604         const struct nd_opt_homeagent_info *oph;
605         const struct nd_opt_route_info *opri;
606         const u_char *cp, *ep;
607         struct in6_addr in6, *in6p;
608         size_t l;
609
610 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
611
612         cp = bp;
613         /* 'ep' points to the end of available data. */
614         ep = snapend;
615
616         while (cp < ep) {
617                 op = (struct nd_opt_hdr *)cp;
618
619                 ECHECK(op->nd_opt_len);
620                 if (resid <= 0)
621                         return;
622                 if (op->nd_opt_len == 0)
623                         goto trunc;
624                 if (cp + (op->nd_opt_len << 3) > ep)
625                         goto trunc;
626
627                 printf("\n\t  %s option (%u), length %u (%u): ",
628                        tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
629                        op->nd_opt_type,
630                        op->nd_opt_len << 3,
631                        op->nd_opt_len);
632
633                 switch (op->nd_opt_type) {
634                 case ND_OPT_SOURCE_LINKADDR:
635                         opl = (struct nd_opt_hdr *)op;
636                         l = (op->nd_opt_len << 3) - 2;
637                         print_lladdr(cp + 2, l);
638                         break;
639                 case ND_OPT_TARGET_LINKADDR:
640                         opl = (struct nd_opt_hdr *)op;
641                         l = (op->nd_opt_len << 3) - 2;
642                         print_lladdr(cp + 2, l);
643                         break;
644                 case ND_OPT_PREFIX_INFORMATION:
645                         opp = (struct nd_opt_prefix_info *)op;
646                         TCHECK(opp->nd_opt_pi_prefix);
647                         printf("%s/%u%s, Flags [%s], valid time %ss",
648                                ip6addr_string(&opp->nd_opt_pi_prefix),
649                                opp->nd_opt_pi_prefix_len,
650                                (op->nd_opt_len != 4) ? "badlen" : "",
651                                bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
652                                get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)));
653                         printf(", pref. time %ss", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)));
654                         break;
655                 case ND_OPT_REDIRECTED_HEADER:
656                         opr = (struct icmp6_opts_redirect *)op;
657                         print_unknown_data(bp,"\n\t    ",op->nd_opt_len<<3);
658                         /* xxx */
659                         break;
660                 case ND_OPT_MTU:
661                         opm = (struct nd_opt_mtu *)op;
662                         TCHECK(opm->nd_opt_mtu_mtu);
663                         printf(" %u%s",
664                                EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
665                                (op->nd_opt_len != 1) ? "bad option length" : "" );
666                         break;
667                 case ND_OPT_ADVINTERVAL:
668                         opa = (struct nd_opt_advinterval *)op;
669                         TCHECK(opa->nd_opt_adv_interval);
670                         printf(" %us", EXTRACT_32BITS(&opa->nd_opt_adv_interval));
671                         break;
672                 case ND_OPT_HOMEAGENT_INFO:
673                         oph = (struct nd_opt_homeagent_info *)op;
674                         TCHECK(oph->nd_opt_hai_lifetime);
675                         printf(" preference %u, lifetime %u",
676                                EXTRACT_16BITS(&oph->nd_opt_hai_preference),
677                                EXTRACT_16BITS(&oph->nd_opt_hai_lifetime));
678                         break;
679                 case ND_OPT_ROUTE_INFO:
680                         opri = (struct nd_opt_route_info *)op;
681                         TCHECK(opri->nd_opt_rti_lifetime);
682                         memset(&in6, 0, sizeof(in6));
683                         in6p = (struct in6_addr *)(opri + 1);
684                         switch (op->nd_opt_len) {
685                         case 1:
686                                 break;
687                         case 2:
688                                 TCHECK2(*in6p, 8);
689                                 memcpy(&in6, opri + 1, 8);
690                                 break;
691                         case 3:
692                                 TCHECK(*in6p);
693                                 memcpy(&in6, opri + 1, sizeof(in6));
694                                 break;
695                         default:
696                                 goto trunc;
697                         }
698                         printf(" %s/%u", ip6addr_string(&in6),
699                             opri->nd_opt_rti_prefixlen);
700                         printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
701                         printf(", lifetime=%s",
702                             get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)));
703                         break;
704                 default:
705                         if (vflag <= 1) {
706                             print_unknown_data(cp+2,"\n\t  ", (op->nd_opt_len << 3) - 2); /* skip option header */
707                             return;
708                         }
709                         break;
710                 }
711                 /* do we want to see an additional hexdump ? */
712                 if (vflag> 1)
713                     print_unknown_data(cp+2,"\n\t    ", (op->nd_opt_len << 3) - 2); /* skip option header */
714
715                 cp += op->nd_opt_len << 3;
716                 resid -= op->nd_opt_len << 3;
717         }
718         return;
719
720  trunc:
721         fputs("[ndp opt]", stdout);
722         return;
723 #undef ECHECK
724 }
725
726 static void
727 mld6_print(const u_char *bp)
728 {
729         struct mld6_hdr *mp = (struct mld6_hdr *)bp;
730         const u_char *ep;
731
732         /* 'ep' points to the end of available data. */
733         ep = snapend;
734
735         if ((u_char *)mp + sizeof(*mp) > ep)
736                 return;
737
738         printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay));
739         printf("addr: %s", ip6addr_string(&mp->mld6_addr));
740 }
741
742 static void
743 mldv2_report_print(const u_char *bp, u_int len)
744 {
745     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
746     u_int group, nsrcs, ngroups;
747     u_int i, j;
748
749     /* Minimum len is 8 */
750     if (len < 8) {
751         printf(" [invalid len %d]", len);
752         return;
753     }
754
755     TCHECK(icp->icmp6_data16[1]);
756     ngroups = ntohs(icp->icmp6_data16[1]);
757     printf(", %d group record(s)", ngroups);
758     if (vflag > 0) {
759         /* Print the group records */
760         group = 8;
761         for (i = 0; i < ngroups; i++) {
762             /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
763             if (len < group + 20) {
764                 printf(" [invalid number of groups]");
765                 return;
766             }
767             TCHECK2(bp[group + 4], sizeof(struct in6_addr));
768             printf(" [gaddr %s", ip6addr_string(&bp[group + 4]));
769             printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]",
770                                                                 bp[group]));
771             nsrcs = (bp[group + 2] << 8) + bp[group + 3];
772             /* Check the number of sources and print them */
773             if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
774                 printf(" [invalid number of sources %d]", nsrcs);
775                 return;
776             }
777             if (vflag == 1)
778                 printf(", %d source(s)", nsrcs);
779             else {
780                 /* Print the sources */
781                 (void)printf(" {");
782                 for (j = 0; j < nsrcs; j++) {
783                     TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
784                             sizeof(struct in6_addr));
785                     printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)]));
786                 }
787                 (void)printf(" }");
788             }
789             /* Next group record */
790             group += 20 + nsrcs * sizeof(struct in6_addr);
791             printf("]");
792         }
793     }
794     return;
795 trunc:
796     (void)printf("[|icmp6]");
797     return;
798 }
799
800 static void
801 mldv2_query_print(const u_char *bp, u_int len)
802 {
803     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
804     u_int mrc;
805     int mrt, qqi;
806     u_int nsrcs;
807     register u_int i;
808
809     /* Minimum len is 28 */
810     if (len < 28) {
811         printf(" [invalid len %d]", len);
812         return;
813     }
814     TCHECK(icp->icmp6_data16[0]);
815     mrc = ntohs(icp->icmp6_data16[0]);
816     if (mrc < 32768) {
817         mrt = mrc;
818     } else {
819         mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
820     }
821     if (vflag) {
822         (void)printf(" [max resp delay=%d]", mrt);
823     }
824     TCHECK2(bp[8], sizeof(struct in6_addr));
825     printf(" [gaddr %s", ip6addr_string(&bp[8]));
826
827     if (vflag) {
828         TCHECK(bp[25]);
829         if (bp[24] & 0x08) {
830                 printf(" sflag");
831         }
832         if (bp[24] & 0x07) {
833                 printf(" robustness=%d", bp[24] & 0x07);
834         }
835         if (bp[25] < 128) {
836                 qqi = bp[25];
837         } else {
838                 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
839         }
840         printf(" qqi=%d", qqi);
841     }
842
843     TCHECK2(bp[26], 2);
844     nsrcs = ntohs(*(u_short *)&bp[26]);
845     if (nsrcs > 0) {
846         if (len < 28 + nsrcs * sizeof(struct in6_addr))
847             printf(" [invalid number of sources]");
848         else if (vflag > 1) {
849             printf(" {");
850             for (i = 0; i < nsrcs; i++) {
851                 TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
852                         sizeof(struct in6_addr));
853                 printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)]));
854             }
855             printf(" }");
856         } else
857             printf(", %d source(s)", nsrcs);
858     }
859     printf("]");
860     return;
861 trunc:
862     (void)printf("[|icmp6]");
863     return;
864 }
865
866 void
867 dnsname_print(const u_char *cp, const u_char *ep)
868 {
869         int i;
870
871         /* DNS name decoding - no decompression */
872         printf(", \"");
873         while (cp < ep) {
874                 i = *cp++;
875                 if (i) {
876                         if (i > ep - cp) {
877                                 printf("???");
878                                 break;
879                         }
880                         while (i-- && cp < ep) {
881                                 safeputchar(*cp);
882                                 cp++;
883                         }
884                         if (cp + 1 < ep && *cp)
885                                 printf(".");
886                 } else {
887                         if (cp == ep) {
888                                 /* FQDN */
889                                 printf(".");
890                         } else if (cp + 1 == ep && *cp == '\0') {
891                                 /* truncated */
892                         } else {
893                                 /* invalid */
894                                 printf("???");
895                         }
896                         break;
897                 }
898         }
899         printf("\"");
900 }
901
902 static void
903 icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep)
904 {
905         struct icmp6_nodeinfo *ni6;
906         struct icmp6_hdr *dp;
907         const u_char *cp;
908         size_t siz, i;
909         int needcomma;
910
911         if (ep < bp)
912                 return;
913         dp = (struct icmp6_hdr *)bp;
914         ni6 = (struct icmp6_nodeinfo *)bp;
915         siz = ep - bp;
916
917         switch (ni6->ni_type) {
918         case ICMP6_NI_QUERY:
919                 if (siz == sizeof(*dp) + 4) {
920                         /* KAME who-are-you */
921                         printf(" who-are-you request");
922                         break;
923                 }
924                 printf(" node information query");
925
926                 TCHECK2(*dp, sizeof(*ni6));
927                 ni6 = (struct icmp6_nodeinfo *)dp;
928                 printf(" (");   /*)*/
929                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
930                 case NI_QTYPE_NOOP:
931                         printf("noop");
932                         break;
933                 case NI_QTYPE_SUPTYPES:
934                         printf("supported qtypes");
935                         i = EXTRACT_16BITS(&ni6->ni_flags);
936                         if (i)
937                                 printf(" [%s]", (i & 0x01) ? "C" : "");
938                         break;
939                         break;
940                 case NI_QTYPE_FQDN:
941                         printf("DNS name");
942                         break;
943                 case NI_QTYPE_NODEADDR:
944                         printf("node addresses");
945                         i = ni6->ni_flags;
946                         if (!i)
947                                 break;
948                         /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
949                         printf(" [%s%s%s%s%s%s]",
950                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
951                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
952                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
953                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
954                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
955                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
956                         break;
957                 default:
958                         printf("unknown");
959                         break;
960                 }
961
962                 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
963                     ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
964                         if (siz != sizeof(*ni6))
965                                 if (vflag)
966                                         printf(", invalid len");
967                         /*(*/
968                         printf(")");
969                         break;
970                 }
971
972
973                 /* XXX backward compat, icmp-name-lookup-03 */
974                 if (siz == sizeof(*ni6)) {
975                         printf(", 03 draft");
976                         /*(*/
977                         printf(")");
978                         break;
979                 }
980
981                 switch (ni6->ni_code) {
982                 case ICMP6_NI_SUBJ_IPV6:
983                         if (!TTEST2(*dp,
984                             sizeof(*ni6) + sizeof(struct in6_addr)))
985                                 break;
986                         if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
987                                 if (vflag)
988                                         printf(", invalid subject len");
989                                 break;
990                         }
991                         printf(", subject=%s",
992                             getname6((const u_char *)(ni6 + 1)));
993                         break;
994                 case ICMP6_NI_SUBJ_FQDN:
995                         printf(", subject=DNS name");
996                         cp = (const u_char *)(ni6 + 1);
997                         if (cp[0] == ep - cp - 1) {
998                                 /* icmp-name-lookup-03, pascal string */
999                                 if (vflag)
1000                                         printf(", 03 draft");
1001                                 cp++;
1002                                 printf(", \"");
1003                                 while (cp < ep) {
1004                                         safeputchar(*cp);
1005                                         cp++;
1006                                 }
1007                                 printf("\"");
1008                         } else
1009                                 dnsname_print(cp, ep);
1010                         break;
1011                 case ICMP6_NI_SUBJ_IPV4:
1012                         if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1013                                 break;
1014                         if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1015                                 if (vflag)
1016                                         printf(", invalid subject len");
1017                                 break;
1018                         }
1019                         printf(", subject=%s",
1020                             getname((const u_char *)(ni6 + 1)));
1021                         break;
1022                 default:
1023                         printf(", unknown subject");
1024                         break;
1025                 }
1026
1027                 /*(*/
1028                 printf(")");
1029                 break;
1030
1031         case ICMP6_NI_REPLY:
1032                 if (icmp6len > siz) {
1033                         printf("[|icmp6: node information reply]");
1034                         break;
1035                 }
1036
1037                 needcomma = 0;
1038
1039                 ni6 = (struct icmp6_nodeinfo *)dp;
1040                 printf(" node information reply");
1041                 printf(" (");   /*)*/
1042                 switch (ni6->ni_code) {
1043                 case ICMP6_NI_SUCCESS:
1044                         if (vflag) {
1045                                 printf("success");
1046                                 needcomma++;
1047                         }
1048                         break;
1049                 case ICMP6_NI_REFUSED:
1050                         printf("refused");
1051                         needcomma++;
1052                         if (siz != sizeof(*ni6))
1053                                 if (vflag)
1054                                         printf(", invalid length");
1055                         break;
1056                 case ICMP6_NI_UNKNOWN:
1057                         printf("unknown");
1058                         needcomma++;
1059                         if (siz != sizeof(*ni6))
1060                                 if (vflag)
1061                                         printf(", invalid length");
1062                         break;
1063                 }
1064
1065                 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1066                         /*(*/
1067                         printf(")");
1068                         break;
1069                 }
1070
1071                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1072                 case NI_QTYPE_NOOP:
1073                         if (needcomma)
1074                                 printf(", ");
1075                         printf("noop");
1076                         if (siz != sizeof(*ni6))
1077                                 if (vflag)
1078                                         printf(", invalid length");
1079                         break;
1080                 case NI_QTYPE_SUPTYPES:
1081                         if (needcomma)
1082                                 printf(", ");
1083                         printf("supported qtypes");
1084                         i = EXTRACT_16BITS(&ni6->ni_flags);
1085                         if (i)
1086                                 printf(" [%s]", (i & 0x01) ? "C" : "");
1087                         break;
1088                 case NI_QTYPE_FQDN:
1089                         if (needcomma)
1090                                 printf(", ");
1091                         printf("DNS name");
1092                         cp = (const u_char *)(ni6 + 1) + 4;
1093                         if (cp[0] == ep - cp - 1) {
1094                                 /* icmp-name-lookup-03, pascal string */
1095                                 if (vflag)
1096                                         printf(", 03 draft");
1097                                 cp++;
1098                                 printf(", \"");
1099                                 while (cp < ep) {
1100                                         safeputchar(*cp);
1101                                         cp++;
1102                                 }
1103                                 printf("\"");
1104                         } else
1105                                 dnsname_print(cp, ep);
1106                         if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1107                                 printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
1108                         break;
1109                 case NI_QTYPE_NODEADDR:
1110                         if (needcomma)
1111                                 printf(", ");
1112                         printf("node addresses");
1113                         i = sizeof(*ni6);
1114                         while (i < siz) {
1115                                 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1116                                         break;
1117                                 printf(" %s", getname6(bp + i));
1118                                 i += sizeof(struct in6_addr);
1119                                 printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i));
1120                                 i += sizeof(int32_t);
1121                         }
1122                         i = ni6->ni_flags;
1123                         if (!i)
1124                                 break;
1125                         printf(" [%s%s%s%s%s%s%s]",
1126                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1127                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1128                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1129                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1130                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1131                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1132                             (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1133                         break;
1134                 default:
1135                         if (needcomma)
1136                                 printf(", ");
1137                         printf("unknown");
1138                         break;
1139                 }
1140
1141                 /*(*/
1142                 printf(")");
1143                 break;
1144         }
1145         return;
1146
1147 trunc:
1148         fputs("[|icmp6]", stdout);
1149 }
1150
1151 static void
1152 icmp6_rrenum_print(const u_char *bp, const u_char *ep)
1153 {
1154         struct icmp6_router_renum *rr6;
1155         const char *cp;
1156         struct rr_pco_match *match;
1157         struct rr_pco_use *use;
1158         char hbuf[NI_MAXHOST];
1159         int n;
1160
1161         if (ep < bp)
1162                 return;
1163         rr6 = (struct icmp6_router_renum *)bp;
1164         cp = (const char *)(rr6 + 1);
1165
1166         TCHECK(rr6->rr_reserved);
1167         switch (rr6->rr_code) {
1168         case ICMP6_ROUTER_RENUMBERING_COMMAND:
1169                 printf("router renum: command");
1170                 break;
1171         case ICMP6_ROUTER_RENUMBERING_RESULT:
1172                 printf("router renum: result");
1173                 break;
1174         case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1175                 printf("router renum: sequence number reset");
1176                 break;
1177         default:
1178                 printf("router renum: code-#%d", rr6->rr_code);
1179                 break;
1180         }
1181
1182         printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum));
1183
1184         if (vflag) {
1185 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1186                 printf("[");    /*]*/
1187                 if (rr6->rr_flags) {
1188                         printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1189                             F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1190                             F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1191                             F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1192                             F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1193                 }
1194                 printf("seg=%u,", rr6->rr_segnum);
1195                 printf("maxdelay=%u", rr6->rr_maxdelay);
1196                 if (rr6->rr_reserved)
1197                         printf("rsvd=0x%x", EXTRACT_16BITS(&rr6->rr_reserved));
1198                 /*[*/
1199                 printf("]");
1200 #undef F
1201         }
1202
1203         if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1204                 match = (struct rr_pco_match *)cp;
1205                 cp = (const char *)(match + 1);
1206
1207                 TCHECK(match->rpm_prefix);
1208
1209                 if (vflag > 1)
1210                         printf("\n\t");
1211                 else
1212                         printf(" ");
1213                 printf("match(");       /*)*/
1214                 switch (match->rpm_code) {
1215                 case RPM_PCO_ADD:       printf("add"); break;
1216                 case RPM_PCO_CHANGE:    printf("change"); break;
1217                 case RPM_PCO_SETGLOBAL: printf("setglobal"); break;
1218                 default:                printf("#%u", match->rpm_code); break;
1219                 }
1220
1221                 if (vflag) {
1222                         printf(",ord=%u", match->rpm_ordinal);
1223                         printf(",min=%u", match->rpm_minlen);
1224                         printf(",max=%u", match->rpm_maxlen);
1225                 }
1226                 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1227                         printf(",%s/%u", hbuf, match->rpm_matchlen);
1228                 else
1229                         printf(",?/%u", match->rpm_matchlen);
1230                 /*(*/
1231                 printf(")");
1232
1233                 n = match->rpm_len - 3;
1234                 if (n % 4)
1235                         goto trunc;
1236                 n /= 4;
1237                 while (n-- > 0) {
1238                         use = (struct rr_pco_use *)cp;
1239                         cp = (const char *)(use + 1);
1240
1241                         TCHECK(use->rpu_prefix);
1242
1243                         if (vflag > 1)
1244                                 printf("\n\t");
1245                         else
1246                                 printf(" ");
1247                         printf("use("); /*)*/
1248                         if (use->rpu_flags) {
1249 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1250                                 printf("%s%s,",
1251                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1252                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
1253 #undef F
1254                         }
1255                         if (vflag) {
1256                                 printf("mask=0x%x,", use->rpu_ramask);
1257                                 printf("raflags=0x%x,", use->rpu_raflags);
1258                                 if (~use->rpu_vltime == 0)
1259                                         printf("vltime=infty,");
1260                                 else
1261                                         printf("vltime=%u,",
1262                                             EXTRACT_32BITS(&use->rpu_vltime));
1263                                 if (~use->rpu_pltime == 0)
1264                                         printf("pltime=infty,");
1265                                 else
1266                                         printf("pltime=%u,",
1267                                             EXTRACT_32BITS(&use->rpu_pltime));
1268                         }
1269                         if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1270                             sizeof(hbuf)))
1271                                 printf("%s/%u/%u", hbuf, use->rpu_uselen,
1272                                     use->rpu_keeplen);
1273                         else
1274                                 printf("?/%u/%u", use->rpu_uselen,
1275                                     use->rpu_keeplen);
1276                         /*(*/
1277                         printf(")");
1278                 }
1279         }
1280
1281         return;
1282
1283 trunc:
1284         fputs("[|icmp6]", stdout);
1285 }
1286
1287 #endif /* INET6 */