contrib/tcpdump/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 1.86 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 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 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 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 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 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 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_ADVINTERVAL, "advertisement interval"},
 140    { ND_OPT_HOMEAGENT_INFO, "homeagent information"},
 141    { ND_OPT_ROUTE_INFO, "route info"},
 142    { 0, NULL }
 143 };
 144
 145 /* mldv2 report types */
 146 static struct tok mldv2report2str[] = {
 147         { 1,    "is_in" },
 148         { 2,    "is_ex" },
 149         { 3,    "to_in" },
 150         { 4,    "to_ex" },
 151         { 5,    "allow" },
 152         { 6,    "block" },
 153         { 0,    NULL }
 154 };
 155
 156 static const char *
 157 get_rtpref(u_int v)
 158 {
 159         static const char *rtpref_str[] = {
 160                 "medium",               /* 00 */
 161                 "high",                 /* 01 */
 162                 "rsv",                  /* 10 */
 163                 "low"                   /* 11 */
 164         };
 165
 166         return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
 167 }
 168
 169 static const char *
 170 get_lifetime(u_int32_t v)
 171 {
 172         static char buf[20];
 173
 174         if (v == (u_int32_t)~0UL)
 175                 return "infinity";
 176         else {
 177                 snprintf(buf, sizeof(buf), "%u", v);
 178                 return buf;
 179         }
 180 }
 181
 182 static void
 183 print_lladdr(const u_int8_t *p, size_t l)
 184 {
 185         const u_int8_t *ep, *q;
 186
 187         q = p;
 188         ep = p + l;
 189         while (l > 0 && q < ep) {
 190                 if (q > p)
 191                         printf(":");
 192                 printf("%02x", *q++);
 193                 l--;
 194         }
 195 }
 196
 197 static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
 198         u_int len)
 199 {
 200         return (nextproto6_cksum(ip6, (const u_int8_t *)(void *)icp, len,
 201             IPPROTO_ICMPV6));
 202 }
 203
 204 enum ND_RPL_CODE {
 205         ND_RPL_DIS   =0x00,
 206         ND_RPL_DIO   =0x01,
 207         ND_RPL_DAO   =0x02,
 208         ND_RPL_DAO_ACK=0x03,
 209         ND_RPL_SDIS  =0x80,
 210         ND_RPL_SDIO  =0x81,
 211         ND_RPL_SDAO  =0x82,
 212         ND_RPL_SDAO_ACK=0x83,
 213         ND_RPL_SCC   =0x8A,
 214 };
 215
 216 enum ND_RPL_DIO_FLAGS {
 217         ND_RPL_DIO_GROUNDED = 0x80,
 218         ND_RPL_DIO_DATRIG   = 0x40,
 219         ND_RPL_DIO_DASUPPORT= 0x20,
 220         ND_RPL_DIO_RES4     = 0x10,
 221         ND_RPL_DIO_RES3     = 0x08,
 222         ND_RPL_DIO_PRF_MASK = 0x07,  /* 3-bit preference */
 223 };
 224
 225 struct nd_rpl_dio {
 226         u_int8_t rpl_flags;
 227         u_int8_t rpl_seq;
 228         u_int8_t rpl_instanceid;
 229         u_int8_t rpl_dagrank;
 230         u_int8_t rpl_dagid[16];
 231 };
 232
 233 static void
 234 rpl_print(netdissect_options *ndo,
 235           const struct icmp6_hdr *hdr,
 236           const u_char *bp, u_int length _U_)
 237 {
 238         struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp;
 239         int secured = hdr->icmp6_code & 0x80;
 240         int basecode= hdr->icmp6_code & 0x7f;
 241
 242         ND_TCHECK(dio->rpl_dagid);
 243
 244         if(secured) {
 245                 ND_PRINT((ndo, ", (SEC)"));
 246         } else {
 247                 ND_PRINT((ndo, ", (CLR)"));
 248         }
 249
 250         switch(basecode) {
 251         case ND_RPL_DIS:
 252                 ND_PRINT((ndo, "DODAG Information Solicitation"));
 253                 if(ndo->ndo_vflag) {
 254                 }
 255                 break;
 256         case ND_RPL_DIO:
 257                 ND_PRINT((ndo, "DODAG Information Object"));
 258                 if(ndo->ndo_vflag) {
 259                         char dagid[65];
 260                         char *d = dagid;
 261                         int  i;
 262                         for(i=0;i<16;i++) {
 263                                 if(isprint(dio->rpl_dagid[i])) {
 264                                         *d++ = dio->rpl_dagid[i];
 265                                 } else {
 266                                         int cnt=snprintf(d,4,"0x%02x",
 267                                                          dio->rpl_dagid[i]);
 268                                         d += cnt;
 269                                 }
 270                         }
 271                         *d++ = '\0';
 272                         ND_PRINT((ndo, " [seq:%u,instance:%u,rank:%u,dagid:%s]",
 273                                   dio->rpl_seq,
 274                                   dio->rpl_instanceid,
 275                                   dio->rpl_dagrank,
 276                                   dagid));
 277                 }
 278                 break;
 279         case ND_RPL_DAO:
 280                 ND_PRINT((ndo, "Destination Advertisement Object"));
 281                 if(ndo->ndo_vflag) {
 282                 }
 283                 break;
 284         case ND_RPL_DAO_ACK:
 285                 ND_PRINT((ndo, "Destination Advertisement Object Ack"));
 286                 if(ndo->ndo_vflag) {
 287                 }
 288                 break;
 289         default:
 290                 ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
 291                 break;
 292         }
 293         return;
 294 trunc:
 295         ND_PRINT((ndo," [|truncated]"));
 296         return;
 297
 298 }
 299
 300
 301 void
 302 icmp6_print(netdissect_options *ndo,
 303             const u_char *bp, u_int length, const u_char *bp2, int fragmented)
 304 {
 305         const struct icmp6_hdr *dp;
 306         const struct ip6_hdr *ip;
 307         const struct ip6_hdr *oip;
 308         const struct udphdr *ouh;
 309         int dport;
 310         const u_char *ep;
 311         u_int prot;
 312
 313         dp = (struct icmp6_hdr *)bp;
 314         ip = (struct ip6_hdr *)bp2;
 315         oip = (struct ip6_hdr *)(dp + 1);
 316         /* 'ep' points to the end of available data. */
 317         ep = snapend;
 318
 319         TCHECK(dp->icmp6_cksum);
 320
 321         if (vflag && !fragmented) {
 322                 u_int16_t sum, udp_sum;
 323
 324                 if (TTEST2(bp[0], length)) {
 325                         udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
 326                         sum = icmp6_cksum(ip, dp, length);
 327                         if (sum != 0)
 328                                 (void)printf("[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
 329                                     udp_sum,
 330                                     in_cksum_shouldbe(udp_sum, sum));
 331                         else
 332                                 (void)printf("[icmp6 sum ok] ");
 333                 }
 334         }
 335
 336         printf("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type));
 337
 338         /* display cosmetics: print the packet length for printer that use the vflag now */
 339         if (vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
 340                       dp->icmp6_type == ND_ROUTER_ADVERT ||
 341                       dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
 342                       dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
 343                       dp->icmp6_type == ND_REDIRECT ||
 344                       dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
 345                       dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
 346             printf(", length %u", length);
 347
 348         switch (dp->icmp6_type) {
 349         case ICMP6_DST_UNREACH:
 350                 TCHECK(oip->ip6_dst);
 351                 printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code));
 352                 switch (dp->icmp6_code) {
 353
 354                 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
 355                 case ICMP6_DST_UNREACH_ADMIN:
 356                 case ICMP6_DST_UNREACH_ADDR:
 357                         printf(" %s",ip6addr_string(&oip->ip6_dst));
 358                         break;
 359                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
 360                         printf(" %s, source address %s",
 361                                ip6addr_string(&oip->ip6_dst),
 362                                ip6addr_string(&oip->ip6_src));
 363                         break;
 364                 case ICMP6_DST_UNREACH_NOPORT:
 365                         if ((ouh = get_upperlayer((u_char *)oip, &prot))
 366                             == NULL)
 367                                 goto trunc;
 368
 369                         dport = EXTRACT_16BITS(&ouh->uh_dport);
 370                         switch (prot) {
 371                         case IPPROTO_TCP:
 372                                 printf(", %s tcp port %s",
 373                                         ip6addr_string(&oip->ip6_dst),
 374                                         tcpport_string(dport));
 375                                 break;
 376                         case IPPROTO_UDP:
 377                                 printf(", %s udp port %s",
 378                                         ip6addr_string(&oip->ip6_dst),
 379                                         udpport_string(dport));
 380                                 break;
 381                         default:
 382                                 printf(", %s protocol %d port %d unreachable",
 383                                         ip6addr_string(&oip->ip6_dst),
 384                                         oip->ip6_nxt, dport);
 385                                 break;
 386                         }
 387                         break;
 388                 default:
 389                     if (vflag <= 1) {
 390                             print_unknown_data(bp,"\n\t",length);
 391                             return;
 392                     }
 393                     break;
 394                 }
 395                 break;
 396         case ICMP6_PACKET_TOO_BIG:
 397                 TCHECK(dp->icmp6_mtu);
 398                 printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu));
 399                 break;
 400         case ICMP6_TIME_EXCEEDED:
 401                 TCHECK(oip->ip6_dst);
 402                 switch (dp->icmp6_code) {
 403                 case ICMP6_TIME_EXCEED_TRANSIT:
 404                         printf(" for %s",
 405                                 ip6addr_string(&oip->ip6_dst));
 406                         break;
 407                 case ICMP6_TIME_EXCEED_REASSEMBLY:
 408                         printf(" (reassembly)");
 409                         break;
 410                 default:
 411                         printf(", unknown code (%u)", dp->icmp6_code);
 412                         break;
 413                 }
 414                 break;
 415         case ICMP6_PARAM_PROB:
 416                 TCHECK(oip->ip6_dst);
 417                 switch (dp->icmp6_code) {
 418                 case ICMP6_PARAMPROB_HEADER:
 419                         printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 420                         break;
 421                 case ICMP6_PARAMPROB_NEXTHEADER:
 422                         printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 423                         break;
 424                 case ICMP6_PARAMPROB_OPTION:
 425                         printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 426                         break;
 427                 default:
 428                         printf(", code-#%d",
 429                                dp->icmp6_code);
 430                         break;
 431                 }
 432                 break;
 433         case ICMP6_ECHO_REQUEST:
 434         case ICMP6_ECHO_REPLY:
 435                 TCHECK(dp->icmp6_seq);
 436                 printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq));
 437                 break;
 438         case ICMP6_MEMBERSHIP_QUERY:
 439                 if (length == MLD_MINLEN) {
 440                         mld6_print((const u_char *)dp);
 441                 } else if (length >= MLDV2_MINLEN) {
 442                         printf("v2 ");
 443                         mldv2_query_print((const u_char *)dp, length);
 444                 } else {
 445                         printf(" unknown-version (len %u) ", length);
 446                 }
 447                 break;
 448         case ICMP6_MEMBERSHIP_REPORT:
 449                 mld6_print((const u_char *)dp);
 450                 break;
 451         case ICMP6_MEMBERSHIP_REDUCTION:
 452                 mld6_print((const u_char *)dp);
 453                 break;
 454         case ND_ROUTER_SOLICIT:
 455 #define RTSOLLEN 8
 456                 if (vflag) {
 457                         icmp6_opt_print((const u_char *)dp + RTSOLLEN,
 458                                         length - RTSOLLEN);
 459                 }
 460                 break;
 461         case ND_ROUTER_ADVERT:
 462 #define RTADVLEN 16
 463                 if (vflag) {
 464                         struct nd_router_advert *p;
 465
 466                         p = (struct nd_router_advert *)dp;
 467                         TCHECK(p->nd_ra_retransmit);
 468                         printf("\n\thop limit %u, Flags [%s]" \
 469                                ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
 470                                (u_int)p->nd_ra_curhoplimit,
 471                                bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
 472                                get_rtpref(p->nd_ra_flags_reserved),
 473                                EXTRACT_16BITS(&p->nd_ra_router_lifetime),
 474                                EXTRACT_32BITS(&p->nd_ra_reachable),
 475                                EXTRACT_32BITS(&p->nd_ra_retransmit));
 476
 477                         icmp6_opt_print((const u_char *)dp + RTADVLEN,
 478                                         length - RTADVLEN);
 479                 }
 480                 break;
 481         case ND_NEIGHBOR_SOLICIT:
 482             {
 483                 struct nd_neighbor_solicit *p;
 484                 p = (struct nd_neighbor_solicit *)dp;
 485                 TCHECK(p->nd_ns_target);
 486                 printf(", who has %s", ip6addr_string(&p->nd_ns_target));
 487                 if (vflag) {
 488 #define NDSOLLEN 24
 489                         icmp6_opt_print((const u_char *)dp + NDSOLLEN,
 490                                         length - NDSOLLEN);
 491                 }
 492             }
 493                 break;
 494         case ND_NEIGHBOR_ADVERT:
 495             {
 496                 struct nd_neighbor_advert *p;
 497
 498                 p = (struct nd_neighbor_advert *)dp;
 499                 TCHECK(p->nd_na_target);
 500                 printf(", tgt is %s",
 501                         ip6addr_string(&p->nd_na_target));
 502                 if (vflag) {
 503                         printf(", Flags [%s]",
 504                                bittok2str(icmp6_nd_na_flag_values,
 505                                           "none",
 506                                           EXTRACT_32BITS(&p->nd_na_flags_reserved)));
 507 #define NDADVLEN 24
 508                         icmp6_opt_print((const u_char *)dp + NDADVLEN,
 509                                         length - NDADVLEN);
 510 #undef NDADVLEN
 511                 }
 512             }
 513                 break;
 514         case ND_REDIRECT:
 515 #define RDR(i) ((struct nd_redirect *)(i))
 516                 TCHECK(RDR(dp)->nd_rd_dst);
 517                 printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst));
 518                 TCHECK(RDR(dp)->nd_rd_target);
 519                 printf(" to %s",
 520                     getname6((const u_char*)&RDR(dp)->nd_rd_target));
 521 #define REDIRECTLEN 40
 522                 if (vflag) {
 523                         icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
 524                                         length - REDIRECTLEN);
 525                 }
 526                 break;
 527 #undef REDIRECTLEN
 528 #undef RDR
 529         case ICMP6_ROUTER_RENUMBERING:
 530                 icmp6_rrenum_print(bp, ep);
 531                 break;
 532         case ICMP6_NI_QUERY:
 533         case ICMP6_NI_REPLY:
 534                 icmp6_nodeinfo_print(length, bp, ep);
 535                 break;
 536         case IND_SOLICIT:
 537         case IND_ADVERT:
 538                 break;
 539         case ICMP6_V2_MEMBERSHIP_REPORT:
 540                 mldv2_report_print((const u_char *) dp, length);
 541                 break;
 542         case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
 543         case ICMP6_HADISCOV_REQUEST:
 544                 TCHECK(dp->icmp6_data16[0]);
 545                 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 546                 break;
 547         case ICMP6_HADISCOV_REPLY:
 548                 if (vflag) {
 549                         struct in6_addr *in6;
 550                         u_char *cp;
 551
 552                         TCHECK(dp->icmp6_data16[0]);
 553                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 554                         cp = (u_char *)dp + length;
 555                         in6 = (struct in6_addr *)(dp + 1);
 556                         for (; (u_char *)in6 < cp; in6++) {
 557                                 TCHECK(*in6);
 558                                 printf(", %s", ip6addr_string(in6));
 559                         }
 560                 }
 561                 break;
 562         case ICMP6_MOBILEPREFIX_ADVERT:
 563                 if (vflag) {
 564                         TCHECK(dp->icmp6_data16[0]);
 565                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 566                         if (dp->icmp6_data16[1] & 0xc0)
 567                                 printf(" ");
 568                         if (dp->icmp6_data16[1] & 0x80)
 569                                 printf("M");
 570                         if (dp->icmp6_data16[1] & 0x40)
 571                                 printf("O");
 572 #define MPADVLEN 8
 573                         icmp6_opt_print((const u_char *)dp + MPADVLEN,
 574                                         length - MPADVLEN);
 575                 }
 576                 break;
 577         case ND_RPL_MESSAGE:
 578                 rpl_print(ndo, dp, &dp->icmp6_data8[0], length);
 579                 break;
 580         default:
 581                 printf(", length %u", length);
 582                 if (vflag <= 1)
 583                     print_unknown_data(bp,"\n\t", length);
 584                 return;
 585         }
 586         if (!vflag)
 587             printf(", length %u", length);
 588         return;
 589 trunc:
 590         fputs("[|icmp6]", stdout);
 591 }
 592
 593 static struct udphdr *
 594 get_upperlayer(u_char *bp, u_int *prot)
 595 {
 596         const u_char *ep;
 597         struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
 598         struct udphdr *uh;
 599         struct ip6_hbh *hbh;
 600         struct ip6_frag *fragh;
 601         struct ah *ah;
 602         u_int nh;
 603         int hlen;
 604
 605         /* 'ep' points to the end of available data. */
 606         ep = snapend;
 607
 608         if (!TTEST(ip6->ip6_nxt))
 609                 return NULL;
 610
 611         nh = ip6->ip6_nxt;
 612         hlen = sizeof(struct ip6_hdr);
 613
 614         while (bp < ep) {
 615                 bp += hlen;
 616
 617                 switch(nh) {
 618                 case IPPROTO_UDP:
 619                 case IPPROTO_TCP:
 620                         uh = (struct udphdr *)bp;
 621                         if (TTEST(uh->uh_dport)) {
 622                                 *prot = nh;
 623                                 return(uh);
 624                         }
 625                         else
 626                                 return(NULL);
 627                         /* NOTREACHED */
 628
 629                 case IPPROTO_HOPOPTS:
 630                 case IPPROTO_DSTOPTS:
 631                 case IPPROTO_ROUTING:
 632                         hbh = (struct ip6_hbh *)bp;
 633                         if (!TTEST(hbh->ip6h_len))
 634                                 return(NULL);
 635                         nh = hbh->ip6h_nxt;
 636                         hlen = (hbh->ip6h_len + 1) << 3;
 637                         break;
 638
 639                 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
 640                         fragh = (struct ip6_frag *)bp;
 641                         if (!TTEST(fragh->ip6f_offlg))
 642                                 return(NULL);
 643                         /* fragments with non-zero offset are meaningless */
 644                         if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
 645                                 return(NULL);
 646                         nh = fragh->ip6f_nxt;
 647                         hlen = sizeof(struct ip6_frag);
 648                         break;
 649
 650                 case IPPROTO_AH:
 651                         ah = (struct ah *)bp;
 652                         if (!TTEST(ah->ah_len))
 653                                 return(NULL);
 654                         nh = ah->ah_nxt;
 655                         hlen = (ah->ah_len + 2) << 2;
 656                         break;
 657
 658                 default:        /* unknown or undecodable header */
 659                         *prot = nh; /* meaningless, but set here anyway */
 660                         return(NULL);
 661                 }
 662         }
 663
 664         return(NULL);           /* should be notreached, though */
 665 }
 666
 667 static void
 668 icmp6_opt_print(const u_char *bp, int resid)
 669 {
 670         const struct nd_opt_hdr *op;
 671         const struct nd_opt_hdr *opl;   /* why there's no struct? */
 672         const struct nd_opt_prefix_info *opp;
 673         const struct icmp6_opts_redirect *opr;
 674         const struct nd_opt_mtu *opm;
 675         const struct nd_opt_rdnss *oprd;
 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;
 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                         opl = (struct nd_opt_hdr *)op;
 710                         l = (op->nd_opt_len << 3) - 2;
 711                         print_lladdr(cp + 2, l);
 712                         break;
 713                 case ND_OPT_TARGET_LINKADDR:
 714                         opl = (struct nd_opt_hdr *)op;
 715                         l = (op->nd_opt_len << 3) - 2;
 716                         print_lladdr(cp + 2, l);
 717                         break;
 718                 case ND_OPT_PREFIX_INFORMATION:
 719                         opp = (struct nd_opt_prefix_info *)op;
 720                         TCHECK(opp->nd_opt_pi_prefix);
 721                         printf("%s/%u%s, Flags [%s], valid time %ss",
 722                                ip6addr_string(&opp->nd_opt_pi_prefix),
 723                                opp->nd_opt_pi_prefix_len,
 724                                (op->nd_opt_len != 4) ? "badlen" : "",
 725                                bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
 726                                get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)));
 727                         printf(", pref. time %ss", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)));
 728                         break;
 729                 case ND_OPT_REDIRECTED_HEADER:
 730                         opr = (struct icmp6_opts_redirect *)op;
 731                         print_unknown_data(bp,"\n\t    ",op->nd_opt_len<<3);
 732                         /* xxx */
 733                         break;
 734                 case ND_OPT_MTU:
 735                         opm = (struct nd_opt_mtu *)op;
 736                         TCHECK(opm->nd_opt_mtu_mtu);
 737                         printf(" %u%s",
 738                                EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
 739                                (op->nd_opt_len != 1) ? "bad option length" : "" );
 740                         break;
 741                 case ND_OPT_RDNSS:
 742                         oprd = (struct nd_opt_rdnss *)op;
 743                         l = (op->nd_opt_len - 1) / 2;
 744                         printf(" lifetime %us,",
 745                                 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime));
 746                         for (i = 0; i < l; i++) {
 747                                 TCHECK(oprd->nd_opt_rdnss_addr[i]);
 748                                 printf(" addr: %s",
 749                                     ip6addr_string(&oprd->nd_opt_rdnss_addr[i]));
 750                         }
 751                         break;
 752                 case ND_OPT_ADVINTERVAL:
 753                         opa = (struct nd_opt_advinterval *)op;
 754                         TCHECK(opa->nd_opt_adv_interval);
 755                         printf(" %us", EXTRACT_32BITS(&opa->nd_opt_adv_interval));
 756                         break;
 757                 case ND_OPT_HOMEAGENT_INFO:
 758                         oph = (struct nd_opt_homeagent_info *)op;
 759                         TCHECK(oph->nd_opt_hai_lifetime);
 760                         printf(" preference %u, lifetime %u",
 761                                EXTRACT_16BITS(&oph->nd_opt_hai_preference),
 762                                EXTRACT_16BITS(&oph->nd_opt_hai_lifetime));
 763                         break;
 764                 case ND_OPT_ROUTE_INFO:
 765                         opri = (struct nd_opt_route_info *)op;
 766                         TCHECK(opri->nd_opt_rti_lifetime);
 767                         memset(&in6, 0, sizeof(in6));
 768                         in6p = (struct in6_addr *)(opri + 1);
 769                         switch (op->nd_opt_len) {
 770                         case 1:
 771                                 break;
 772                         case 2:
 773                                 TCHECK2(*in6p, 8);
 774                                 memcpy(&in6, opri + 1, 8);
 775                                 break;
 776                         case 3:
 777                                 TCHECK(*in6p);
 778                                 memcpy(&in6, opri + 1, sizeof(in6));
 779                                 break;
 780                         default:
 781                                 goto trunc;
 782                         }
 783                         printf(" %s/%u", ip6addr_string(&in6),
 784                             opri->nd_opt_rti_prefixlen);
 785                         printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
 786                         printf(", lifetime=%s",
 787                             get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)));
 788                         break;
 789                 default:
 790                         if (vflag <= 1) {
 791                             print_unknown_data(cp+2,"\n\t  ", (op->nd_opt_len << 3) - 2); /* skip option header */
 792                             return;
 793                         }
 794                         break;
 795                 }
 796                 /* do we want to see an additional hexdump ? */
 797                 if (vflag> 1)
 798                     print_unknown_data(cp+2,"\n\t    ", (op->nd_opt_len << 3) - 2); /* skip option header */
 799
 800                 cp += op->nd_opt_len << 3;
 801                 resid -= op->nd_opt_len << 3;
 802         }
 803         return;
 804
 805  trunc:
 806         fputs("[ndp opt]", stdout);
 807         return;
 808 #undef ECHECK
 809 }
 810
 811 static void
 812 mld6_print(const u_char *bp)
 813 {
 814         struct mld6_hdr *mp = (struct mld6_hdr *)bp;
 815         const u_char *ep;
 816
 817         /* 'ep' points to the end of available data. */
 818         ep = snapend;
 819
 820         if ((u_char *)mp + sizeof(*mp) > ep)
 821                 return;
 822
 823         printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay));
 824         printf("addr: %s", ip6addr_string(&mp->mld6_addr));
 825 }
 826
 827 static void
 828 mldv2_report_print(const u_char *bp, u_int len)
 829 {
 830     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
 831     u_int group, nsrcs, ngroups;
 832     u_int i, j;
 833
 834     /* Minimum len is 8 */
 835     if (len < 8) {
 836         printf(" [invalid len %d]", len);
 837         return;
 838     }
 839
 840     TCHECK(icp->icmp6_data16[1]);
 841     ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
 842     printf(", %d group record(s)", ngroups);
 843     if (vflag > 0) {
 844         /* Print the group records */
 845         group = 8;
 846         for (i = 0; i < ngroups; i++) {
 847             /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
 848             if (len < group + 20) {
 849                 printf(" [invalid number of groups]");
 850                 return;
 851             }
 852             TCHECK2(bp[group + 4], sizeof(struct in6_addr));
 853             printf(" [gaddr %s", ip6addr_string(&bp[group + 4]));
 854             printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]",
 855                                                                 bp[group]));
 856             nsrcs = (bp[group + 2] << 8) + bp[group + 3];
 857             /* Check the number of sources and print them */
 858             if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
 859                 printf(" [invalid number of sources %d]", nsrcs);
 860                 return;
 861             }
 862             if (vflag == 1)
 863                 printf(", %d source(s)", nsrcs);
 864             else {
 865                 /* Print the sources */
 866                 (void)printf(" {");
 867                 for (j = 0; j < nsrcs; j++) {
 868                     TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
 869                             sizeof(struct in6_addr));
 870                     printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)]));
 871                 }
 872                 (void)printf(" }");
 873             }
 874             /* Next group record */
 875             group += 20 + nsrcs * sizeof(struct in6_addr);
 876             printf("]");
 877         }
 878     }
 879     return;
 880 trunc:
 881     (void)printf("[|icmp6]");
 882     return;
 883 }
 884
 885 static void
 886 mldv2_query_print(const u_char *bp, u_int len)
 887 {
 888     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
 889     u_int mrc;
 890     int mrt, qqi;
 891     u_int nsrcs;
 892     register u_int i;
 893
 894     /* Minimum len is 28 */
 895     if (len < 28) {
 896         printf(" [invalid len %d]", len);
 897         return;
 898     }
 899     TCHECK(icp->icmp6_data16[0]);
 900     mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
 901     if (mrc < 32768) {
 902         mrt = mrc;
 903     } else {
 904         mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
 905     }
 906     if (vflag) {
 907         (void)printf(" [max resp delay=%d]", mrt);
 908     }
 909     TCHECK2(bp[8], sizeof(struct in6_addr));
 910     printf(" [gaddr %s", ip6addr_string(&bp[8]));
 911
 912     if (vflag) {
 913         TCHECK(bp[25]);
 914         if (bp[24] & 0x08) {
 915                 printf(" sflag");
 916         }
 917         if (bp[24] & 0x07) {
 918                 printf(" robustness=%d", bp[24] & 0x07);
 919         }
 920         if (bp[25] < 128) {
 921                 qqi = bp[25];
 922         } else {
 923                 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
 924         }
 925         printf(" qqi=%d", qqi);
 926     }
 927
 928     TCHECK2(bp[26], 2);
 929     nsrcs = EXTRACT_16BITS(&bp[26]);
 930     if (nsrcs > 0) {
 931         if (len < 28 + nsrcs * sizeof(struct in6_addr))
 932             printf(" [invalid number of sources]");
 933         else if (vflag > 1) {
 934             printf(" {");
 935             for (i = 0; i < nsrcs; i++) {
 936                 TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
 937                         sizeof(struct in6_addr));
 938                 printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)]));
 939             }
 940             printf(" }");
 941         } else
 942             printf(", %d source(s)", nsrcs);
 943     }
 944     printf("]");
 945     return;
 946 trunc:
 947     (void)printf("[|icmp6]");
 948     return;
 949 }
 950
 951 static void
 952 dnsname_print(const u_char *cp, const u_char *ep)
 953 {
 954         int i;
 955
 956         /* DNS name decoding - no decompression */
 957         printf(", \"");
 958         while (cp < ep) {
 959                 i = *cp++;
 960                 if (i) {
 961                         if (i > ep - cp) {
 962                                 printf("???");
 963                                 break;
 964                         }
 965                         while (i-- && cp < ep) {
 966                                 safeputchar(*cp);
 967                                 cp++;
 968                         }
 969                         if (cp + 1 < ep && *cp)
 970                                 printf(".");
 971                 } else {
 972                         if (cp == ep) {
 973                                 /* FQDN */
 974                                 printf(".");
 975                         } else if (cp + 1 == ep && *cp == '\0') {
 976                                 /* truncated */
 977                         } else {
 978                                 /* invalid */
 979                                 printf("???");
 980                         }
 981                         break;
 982                 }
 983         }
 984         printf("\"");
 985 }
 986
 987 static void
 988 icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep)
 989 {
 990         struct icmp6_nodeinfo *ni6;
 991         struct icmp6_hdr *dp;
 992         const u_char *cp;
 993         size_t siz, i;
 994         int needcomma;
 995
 996         if (ep < bp)
 997                 return;
 998         dp = (struct icmp6_hdr *)bp;
 999         ni6 = (struct icmp6_nodeinfo *)bp;
1000         siz = ep - bp;
1001
1002         switch (ni6->ni_type) {
1003         case ICMP6_NI_QUERY:
1004                 if (siz == sizeof(*dp) + 4) {
1005                         /* KAME who-are-you */
1006                         printf(" who-are-you request");
1007                         break;
1008                 }
1009                 printf(" node information query");
1010
1011                 TCHECK2(*dp, sizeof(*ni6));
1012                 ni6 = (struct icmp6_nodeinfo *)dp;
1013                 printf(" (");   /*)*/
1014                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1015                 case NI_QTYPE_NOOP:
1016                         printf("noop");
1017                         break;
1018                 case NI_QTYPE_SUPTYPES:
1019                         printf("supported qtypes");
1020                         i = EXTRACT_16BITS(&ni6->ni_flags);
1021                         if (i)
1022                                 printf(" [%s]", (i & 0x01) ? "C" : "");
1023                         break;
1024                         break;
1025                 case NI_QTYPE_FQDN:
1026                         printf("DNS name");
1027                         break;
1028                 case NI_QTYPE_NODEADDR:
1029                         printf("node addresses");
1030                         i = ni6->ni_flags;
1031                         if (!i)
1032                                 break;
1033                         /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1034                         printf(" [%s%s%s%s%s%s]",
1035                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1036                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1037                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1038                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1039                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1040                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
1041                         break;
1042                 default:
1043                         printf("unknown");
1044                         break;
1045                 }
1046
1047                 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1048                     ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1049                         if (siz != sizeof(*ni6))
1050                                 if (vflag)
1051                                         printf(", invalid len");
1052                         /*(*/
1053                         printf(")");
1054                         break;
1055                 }
1056
1057
1058                 /* XXX backward compat, icmp-name-lookup-03 */
1059                 if (siz == sizeof(*ni6)) {
1060                         printf(", 03 draft");
1061                         /*(*/
1062                         printf(")");
1063                         break;
1064                 }
1065
1066                 switch (ni6->ni_code) {
1067                 case ICMP6_NI_SUBJ_IPV6:
1068                         if (!TTEST2(*dp,
1069                             sizeof(*ni6) + sizeof(struct in6_addr)))
1070                                 break;
1071                         if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1072                                 if (vflag)
1073                                         printf(", invalid subject len");
1074                                 break;
1075                         }
1076                         printf(", subject=%s",
1077                             getname6((const u_char *)(ni6 + 1)));
1078                         break;
1079                 case ICMP6_NI_SUBJ_FQDN:
1080                         printf(", subject=DNS name");
1081                         cp = (const u_char *)(ni6 + 1);
1082                         if (cp[0] == ep - cp - 1) {
1083                                 /* icmp-name-lookup-03, pascal string */
1084                                 if (vflag)
1085                                         printf(", 03 draft");
1086                                 cp++;
1087                                 printf(", \"");
1088                                 while (cp < ep) {
1089                                         safeputchar(*cp);
1090                                         cp++;
1091                                 }
1092                                 printf("\"");
1093                         } else
1094                                 dnsname_print(cp, ep);
1095                         break;
1096                 case ICMP6_NI_SUBJ_IPV4:
1097                         if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1098                                 break;
1099                         if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1100                                 if (vflag)
1101                                         printf(", invalid subject len");
1102                                 break;
1103                         }
1104                         printf(", subject=%s",
1105                             getname((const u_char *)(ni6 + 1)));
1106                         break;
1107                 default:
1108                         printf(", unknown subject");
1109                         break;
1110                 }
1111
1112                 /*(*/
1113                 printf(")");
1114                 break;
1115
1116         case ICMP6_NI_REPLY:
1117                 if (icmp6len > siz) {
1118                         printf("[|icmp6: node information reply]");
1119                         break;
1120                 }
1121
1122                 needcomma = 0;
1123
1124                 ni6 = (struct icmp6_nodeinfo *)dp;
1125                 printf(" node information reply");
1126                 printf(" (");   /*)*/
1127                 switch (ni6->ni_code) {
1128                 case ICMP6_NI_SUCCESS:
1129                         if (vflag) {
1130                                 printf("success");
1131                                 needcomma++;
1132                         }
1133                         break;
1134                 case ICMP6_NI_REFUSED:
1135                         printf("refused");
1136                         needcomma++;
1137                         if (siz != sizeof(*ni6))
1138                                 if (vflag)
1139                                         printf(", invalid length");
1140                         break;
1141                 case ICMP6_NI_UNKNOWN:
1142                         printf("unknown");
1143                         needcomma++;
1144                         if (siz != sizeof(*ni6))
1145                                 if (vflag)
1146                                         printf(", invalid length");
1147                         break;
1148                 }
1149
1150                 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1151                         /*(*/
1152                         printf(")");
1153                         break;
1154                 }
1155
1156                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1157                 case NI_QTYPE_NOOP:
1158                         if (needcomma)
1159                                 printf(", ");
1160                         printf("noop");
1161                         if (siz != sizeof(*ni6))
1162                                 if (vflag)
1163                                         printf(", invalid length");
1164                         break;
1165                 case NI_QTYPE_SUPTYPES:
1166                         if (needcomma)
1167                                 printf(", ");
1168                         printf("supported qtypes");
1169                         i = EXTRACT_16BITS(&ni6->ni_flags);
1170                         if (i)
1171                                 printf(" [%s]", (i & 0x01) ? "C" : "");
1172                         break;
1173                 case NI_QTYPE_FQDN:
1174                         if (needcomma)
1175                                 printf(", ");
1176                         printf("DNS name");
1177                         cp = (const u_char *)(ni6 + 1) + 4;
1178                         if (cp[0] == ep - cp - 1) {
1179                                 /* icmp-name-lookup-03, pascal string */
1180                                 if (vflag)
1181                                         printf(", 03 draft");
1182                                 cp++;
1183                                 printf(", \"");
1184                                 while (cp < ep) {
1185                                         safeputchar(*cp);
1186                                         cp++;
1187                                 }
1188                                 printf("\"");
1189                         } else
1190                                 dnsname_print(cp, ep);
1191                         if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1192                                 printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
1193                         break;
1194                 case NI_QTYPE_NODEADDR:
1195                         if (needcomma)
1196                                 printf(", ");
1197                         printf("node addresses");
1198                         i = sizeof(*ni6);
1199                         while (i < siz) {
1200                                 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1201                                         break;
1202                                 printf(" %s", getname6(bp + i));
1203                                 i += sizeof(struct in6_addr);
1204                                 printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i));
1205                                 i += sizeof(int32_t);
1206                         }
1207                         i = ni6->ni_flags;
1208                         if (!i)
1209                                 break;
1210                         printf(" [%s%s%s%s%s%s%s]",
1211                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1212                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1213                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1214                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1215                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1216                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1217                             (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1218                         break;
1219                 default:
1220                         if (needcomma)
1221                                 printf(", ");
1222                         printf("unknown");
1223                         break;
1224                 }
1225
1226                 /*(*/
1227                 printf(")");
1228                 break;
1229         }
1230         return;
1231
1232 trunc:
1233         fputs("[|icmp6]", stdout);
1234 }
1235
1236 static void
1237 icmp6_rrenum_print(const u_char *bp, const u_char *ep)
1238 {
1239         struct icmp6_router_renum *rr6;
1240         const char *cp;
1241         struct rr_pco_match *match;
1242         struct rr_pco_use *use;
1243         char hbuf[NI_MAXHOST];
1244         int n;
1245
1246         if (ep < bp)
1247                 return;
1248         rr6 = (struct icmp6_router_renum *)bp;
1249         cp = (const char *)(rr6 + 1);
1250
1251         TCHECK(rr6->rr_reserved);
1252         switch (rr6->rr_code) {
1253         case ICMP6_ROUTER_RENUMBERING_COMMAND:
1254                 printf("router renum: command");
1255                 break;
1256         case ICMP6_ROUTER_RENUMBERING_RESULT:
1257                 printf("router renum: result");
1258                 break;
1259         case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1260                 printf("router renum: sequence number reset");
1261                 break;
1262         default:
1263                 printf("router renum: code-#%d", rr6->rr_code);
1264                 break;
1265         }
1266
1267         printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum));
1268
1269         if (vflag) {
1270 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1271                 printf("[");    /*]*/
1272                 if (rr6->rr_flags) {
1273                         printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1274                             F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1275                             F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1276                             F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1277                             F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1278                 }
1279                 printf("seg=%u,", rr6->rr_segnum);
1280                 printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay));
1281                 if (rr6->rr_reserved)
1282                         printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved));
1283                 /*[*/
1284                 printf("]");
1285 #undef F
1286         }
1287
1288         if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1289                 match = (struct rr_pco_match *)cp;
1290                 cp = (const char *)(match + 1);
1291
1292                 TCHECK(match->rpm_prefix);
1293
1294                 if (vflag > 1)
1295                         printf("\n\t");
1296                 else
1297                         printf(" ");
1298                 printf("match(");       /*)*/
1299                 switch (match->rpm_code) {
1300                 case RPM_PCO_ADD:       printf("add"); break;
1301                 case RPM_PCO_CHANGE:    printf("change"); break;
1302                 case RPM_PCO_SETGLOBAL: printf("setglobal"); break;
1303                 default:                printf("#%u", match->rpm_code); break;
1304                 }
1305
1306                 if (vflag) {
1307                         printf(",ord=%u", match->rpm_ordinal);
1308                         printf(",min=%u", match->rpm_minlen);
1309                         printf(",max=%u", match->rpm_maxlen);
1310                 }
1311                 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1312                         printf(",%s/%u", hbuf, match->rpm_matchlen);
1313                 else
1314                         printf(",?/%u", match->rpm_matchlen);
1315                 /*(*/
1316                 printf(")");
1317
1318                 n = match->rpm_len - 3;
1319                 if (n % 4)
1320                         goto trunc;
1321                 n /= 4;
1322                 while (n-- > 0) {
1323                         use = (struct rr_pco_use *)cp;
1324                         cp = (const char *)(use + 1);
1325
1326                         TCHECK(use->rpu_prefix);
1327
1328                         if (vflag > 1)
1329                                 printf("\n\t");
1330                         else
1331                                 printf(" ");
1332                         printf("use("); /*)*/
1333                         if (use->rpu_flags) {
1334 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1335                                 printf("%s%s,",
1336                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1337                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
1338 #undef F
1339                         }
1340                         if (vflag) {
1341                                 printf("mask=0x%x,", use->rpu_ramask);
1342                                 printf("raflags=0x%x,", use->rpu_raflags);
1343                                 if (~use->rpu_vltime == 0)
1344                                         printf("vltime=infty,");
1345                                 else
1346                                         printf("vltime=%u,",
1347                                             EXTRACT_32BITS(&use->rpu_vltime));
1348                                 if (~use->rpu_pltime == 0)
1349                                         printf("pltime=infty,");
1350                                 else
1351                                         printf("pltime=%u,",
1352                                             EXTRACT_32BITS(&use->rpu_pltime));
1353                         }
1354                         if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1355                             sizeof(hbuf)))
1356                                 printf("%s/%u/%u", hbuf, use->rpu_uselen,
1357                                     use->rpu_keeplen);
1358                         else
1359                                 printf("?/%u/%u", use->rpu_uselen,
1360                                     use->rpu_keeplen);
1361                         /*(*/
1362                         printf(")");
1363                 }
1364         }
1365
1366         return;
1367
1368 trunc:
1369         fputs("[|icmp6]", stdout);
1370 }
1371
1372 #endif /* INET6 */