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         size_t i;
 201         register const u_int16_t *sp;
 202         u_int32_t sum;
 203         union {
 204                 struct {
 205                         struct in6_addr ph_src;
 206                         struct in6_addr ph_dst;
 207                         u_int32_t       ph_len;
 208                         u_int8_t        ph_zero[3];
 209                         u_int8_t        ph_nxt;
 210                 } ph;
 211                 u_int16_t pa[20];
 212         } phu;
 213
 214         /* pseudo-header */
 215         memset(&phu, 0, sizeof(phu));
 216         phu.ph.ph_src = ip6->ip6_src;
 217         phu.ph.ph_dst = ip6->ip6_dst;
 218         phu.ph.ph_len = htonl(len);
 219         phu.ph.ph_nxt = IPPROTO_ICMPV6;
 220
 221         sum = 0;
 222         for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++)
 223                 sum += phu.pa[i];
 224
 225         sp = (const u_int16_t *)icp;
 226
 227         for (i = 0; i < (len & ~1); i += 2)
 228                 sum += *sp++;
 229
 230         if (len & 1)
 231                 sum += htons((*(const u_int8_t *)sp) << 8);
 232
 233         while (sum > 0xffff)
 234                 sum = (sum & 0xffff) + (sum >> 16);
 235         sum = ~sum & 0xffff;
 236
 237         return (sum);
 238 }
 239
 240 enum ND_RPL_CODE {
 241         ND_RPL_DAG_IS=0x01,
 242         ND_RPL_DAG_IO=0x02,
 243         ND_RPL_DAO   =0x04
 244 };
 245
 246 enum ND_RPL_DIO_FLAGS {
 247         ND_RPL_DIO_GROUNDED = 0x80,
 248         ND_RPL_DIO_DATRIG   = 0x40,
 249         ND_RPL_DIO_DASUPPORT= 0x20,
 250         ND_RPL_DIO_RES4     = 0x10,
 251         ND_RPL_DIO_RES3     = 0x08,
 252         ND_RPL_DIO_PRF_MASK = 0x07,  /* 3-bit preference */
 253 };
 254
 255 struct nd_rpl_dio {
 256         u_int8_t rpl_flags;
 257         u_int8_t rpl_seq;
 258         u_int8_t rpl_instanceid;
 259         u_int8_t rpl_dagrank;
 260         u_int8_t rpl_dagid[16];
 261 };
 262
 263 static void
 264 rpl_print(netdissect_options *ndo,
 265           const struct icmp6_hdr *hdr,
 266           const u_char *bp, u_int length _U_)
 267 {
 268         struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp;
 269
 270         ND_TCHECK(dio->rpl_dagid);
 271
 272         switch(hdr->icmp6_code) {
 273         case ND_RPL_DAG_IS:
 274                 ND_PRINT((ndo, ", DAG Information Solicitation"));
 275                 if(ndo->ndo_vflag) {
 276                 }
 277                 break;
 278         case ND_RPL_DAG_IO:
 279                 ND_PRINT((ndo, ", DAG Information Object"));
 280                 if(ndo->ndo_vflag) {
 281                         char dagid[65];
 282                         char *d = dagid;
 283                         int  i;
 284                         for(i=0;i<16;i++) {
 285                                 if(isprint(dio->rpl_dagid[i])) {
 286                                         *d++ = dio->rpl_dagid[i];
 287                                 } else {
 288                                         int cnt=snprintf(d,4,"0x%02x",
 289                                                          dio->rpl_dagid[i]);
 290                                         d += cnt;
 291                                 }
 292                         }
 293                         *d++ = '\0';
 294                         ND_PRINT((ndo, " [seq:%u,instance:%u,rank:%u,dagid:%s]",
 295                                   dio->rpl_seq,
 296                                   dio->rpl_instanceid,
 297                                   dio->rpl_dagrank,
 298                                   dagid));
 299                 }
 300                 break;
 301         case ND_RPL_DAO:
 302                 ND_PRINT((ndo, ", Destination Advertisement Object"));
 303                 if(ndo->ndo_vflag) {
 304                 }
 305                 break;
 306         default:
 307                 ND_PRINT((ndo, ", RPL message, unknown code %u",hdr->icmp6_code));
 308                 break;
 309         }
 310         return;
 311 trunc:
 312         ND_PRINT((ndo," [|truncated]"));
 313         return;
 314
 315 }
 316
 317
 318 void
 319 icmp6_print(netdissect_options *ndo,
 320             const u_char *bp, u_int length, const u_char *bp2, int fragmented)
 321 {
 322         const struct icmp6_hdr *dp;
 323         const struct ip6_hdr *ip;
 324         const struct ip6_hdr *oip;
 325         const struct udphdr *ouh;
 326         int dport;
 327         const u_char *ep;
 328         u_int prot;
 329
 330         dp = (struct icmp6_hdr *)bp;
 331         ip = (struct ip6_hdr *)bp2;
 332         oip = (struct ip6_hdr *)(dp + 1);
 333         /* 'ep' points to the end of available data. */
 334         ep = snapend;
 335
 336         TCHECK(dp->icmp6_cksum);
 337
 338         if (vflag && !fragmented) {
 339                 int sum = dp->icmp6_cksum;
 340
 341                 if (TTEST2(bp[0], length)) {
 342                         sum = icmp6_cksum(ip, dp, length);
 343                         if (sum != 0)
 344                                 (void)printf("[bad icmp6 cksum %x!] ", sum);
 345                         else
 346                                 (void)printf("[icmp6 sum ok] ");
 347                 }
 348         }
 349
 350         printf("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type));
 351
 352         /* display cosmetics: print the packet length for printer that use the vflag now */
 353         if (vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
 354                       dp->icmp6_type == ND_ROUTER_ADVERT ||
 355                       dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
 356                       dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
 357                       dp->icmp6_type == ND_REDIRECT ||
 358                       dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
 359                       dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
 360             printf(", length %u", length);
 361
 362         switch (dp->icmp6_type) {
 363         case ICMP6_DST_UNREACH:
 364                 TCHECK(oip->ip6_dst);
 365                 printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code));
 366                 switch (dp->icmp6_code) {
 367
 368                 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
 369                 case ICMP6_DST_UNREACH_ADMIN:
 370                 case ICMP6_DST_UNREACH_ADDR:
 371                         printf(" %s",ip6addr_string(&oip->ip6_dst));
 372                         break;
 373                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
 374                         printf(" %s, source address %s",
 375                                ip6addr_string(&oip->ip6_dst),
 376                                ip6addr_string(&oip->ip6_src));
 377                         break;
 378                 case ICMP6_DST_UNREACH_NOPORT:
 379                         if ((ouh = get_upperlayer((u_char *)oip, &prot))
 380                             == NULL)
 381                                 goto trunc;
 382
 383                         dport = EXTRACT_16BITS(&ouh->uh_dport);
 384                         switch (prot) {
 385                         case IPPROTO_TCP:
 386                                 printf(", %s tcp port %s",
 387                                         ip6addr_string(&oip->ip6_dst),
 388                                         tcpport_string(dport));
 389                                 break;
 390                         case IPPROTO_UDP:
 391                                 printf(", %s udp port %s",
 392                                         ip6addr_string(&oip->ip6_dst),
 393                                         udpport_string(dport));
 394                                 break;
 395                         default:
 396                                 printf(", %s protocol %d port %d unreachable",
 397                                         ip6addr_string(&oip->ip6_dst),
 398                                         oip->ip6_nxt, dport);
 399                                 break;
 400                         }
 401                         break;
 402                 default:
 403                     if (vflag <= 1) {
 404                             print_unknown_data(bp,"\n\t",length);
 405                             return;
 406                     }
 407                     break;
 408                 }
 409                 break;
 410         case ICMP6_PACKET_TOO_BIG:
 411                 TCHECK(dp->icmp6_mtu);
 412                 printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu));
 413                 break;
 414         case ICMP6_TIME_EXCEEDED:
 415                 TCHECK(oip->ip6_dst);
 416                 switch (dp->icmp6_code) {
 417                 case ICMP6_TIME_EXCEED_TRANSIT:
 418                         printf(" for %s",
 419                                 ip6addr_string(&oip->ip6_dst));
 420                         break;
 421                 case ICMP6_TIME_EXCEED_REASSEMBLY:
 422                         printf(" (reassembly)");
 423                         break;
 424                 default:
 425                         printf(", unknown code (%u)", dp->icmp6_code);
 426                         break;
 427                 }
 428                 break;
 429         case ICMP6_PARAM_PROB:
 430                 TCHECK(oip->ip6_dst);
 431                 switch (dp->icmp6_code) {
 432                 case ICMP6_PARAMPROB_HEADER:
 433                         printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 434                         break;
 435                 case ICMP6_PARAMPROB_NEXTHEADER:
 436                         printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 437                         break;
 438                 case ICMP6_PARAMPROB_OPTION:
 439                         printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 440                         break;
 441                 default:
 442                         printf(", code-#%d",
 443                                dp->icmp6_code);
 444                         break;
 445                 }
 446                 break;
 447         case ICMP6_ECHO_REQUEST:
 448         case ICMP6_ECHO_REPLY:
 449                 TCHECK(dp->icmp6_seq);
 450                 printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq));
 451                 break;
 452         case ICMP6_MEMBERSHIP_QUERY:
 453                 if (length == MLD_MINLEN) {
 454                         mld6_print((const u_char *)dp);
 455                 } else if (length >= MLDV2_MINLEN) {
 456                         printf("v2 ");
 457                         mldv2_query_print((const u_char *)dp, length);
 458                 } else {
 459                         printf(" unknown-version (len %u) ", length);
 460                 }
 461                 break;
 462         case ICMP6_MEMBERSHIP_REPORT:
 463                 mld6_print((const u_char *)dp);
 464                 break;
 465         case ICMP6_MEMBERSHIP_REDUCTION:
 466                 mld6_print((const u_char *)dp);
 467                 break;
 468         case ND_ROUTER_SOLICIT:
 469 #define RTSOLLEN 8
 470                 if (vflag) {
 471                         icmp6_opt_print((const u_char *)dp + RTSOLLEN,
 472                                         length - RTSOLLEN);
 473                 }
 474                 break;
 475         case ND_ROUTER_ADVERT:
 476 #define RTADVLEN 16
 477                 if (vflag) {
 478                         struct nd_router_advert *p;
 479
 480                         p = (struct nd_router_advert *)dp;
 481                         TCHECK(p->nd_ra_retransmit);
 482                         printf("\n\thop limit %u, Flags [%s]" \
 483                                ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
 484                                (u_int)p->nd_ra_curhoplimit,
 485                                bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
 486                                get_rtpref(p->nd_ra_flags_reserved),
 487                                EXTRACT_16BITS(&p->nd_ra_router_lifetime),
 488                                EXTRACT_32BITS(&p->nd_ra_reachable),
 489                                EXTRACT_32BITS(&p->nd_ra_retransmit));
 490
 491                         icmp6_opt_print((const u_char *)dp + RTADVLEN,
 492                                         length - RTADVLEN);
 493                 }
 494                 break;
 495         case ND_NEIGHBOR_SOLICIT:
 496             {
 497                 struct nd_neighbor_solicit *p;
 498                 p = (struct nd_neighbor_solicit *)dp;
 499                 TCHECK(p->nd_ns_target);
 500                 printf(", who has %s", ip6addr_string(&p->nd_ns_target));
 501                 if (vflag) {
 502 #define NDSOLLEN 24
 503                         icmp6_opt_print((const u_char *)dp + NDSOLLEN,
 504                                         length - NDSOLLEN);
 505                 }
 506             }
 507                 break;
 508         case ND_NEIGHBOR_ADVERT:
 509             {
 510                 struct nd_neighbor_advert *p;
 511
 512                 p = (struct nd_neighbor_advert *)dp;
 513                 TCHECK(p->nd_na_target);
 514                 printf(", tgt is %s",
 515                         ip6addr_string(&p->nd_na_target));
 516                 if (vflag) {
 517                         printf(", Flags [%s]",
 518                                bittok2str(icmp6_nd_na_flag_values,
 519                                           "none",
 520                                           EXTRACT_32BITS(&p->nd_na_flags_reserved)));
 521 #define NDADVLEN 24
 522                         icmp6_opt_print((const u_char *)dp + NDADVLEN,
 523                                         length - NDADVLEN);
 524 #undef NDADVLEN
 525                 }
 526             }
 527                 break;
 528         case ND_REDIRECT:
 529 #define RDR(i) ((struct nd_redirect *)(i))
 530                 TCHECK(RDR(dp)->nd_rd_dst);
 531                 printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst));
 532                 TCHECK(RDR(dp)->nd_rd_target);
 533                 printf(" to %s",
 534                     getname6((const u_char*)&RDR(dp)->nd_rd_target));
 535 #define REDIRECTLEN 40
 536                 if (vflag) {
 537                         icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
 538                                         length - REDIRECTLEN);
 539                 }
 540                 break;
 541 #undef REDIRECTLEN
 542 #undef RDR
 543         case ICMP6_ROUTER_RENUMBERING:
 544                 icmp6_rrenum_print(bp, ep);
 545                 break;
 546         case ICMP6_NI_QUERY:
 547         case ICMP6_NI_REPLY:
 548                 icmp6_nodeinfo_print(length, bp, ep);
 549                 break;
 550         case IND_SOLICIT:
 551         case IND_ADVERT:
 552                 break;
 553         case ICMP6_V2_MEMBERSHIP_REPORT:
 554                 mldv2_report_print((const u_char *) dp, length);
 555                 break;
 556         case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
 557         case ICMP6_HADISCOV_REQUEST:
 558                 TCHECK(dp->icmp6_data16[0]);
 559                 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 560                 break;
 561         case ICMP6_HADISCOV_REPLY:
 562                 if (vflag) {
 563                         struct in6_addr *in6;
 564                         u_char *cp;
 565
 566                         TCHECK(dp->icmp6_data16[0]);
 567                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 568                         cp = (u_char *)dp + length;
 569                         in6 = (struct in6_addr *)(dp + 1);
 570                         for (; (u_char *)in6 < cp; in6++) {
 571                                 TCHECK(*in6);
 572                                 printf(", %s", ip6addr_string(in6));
 573                         }
 574                 }
 575                 break;
 576         case ICMP6_MOBILEPREFIX_ADVERT:
 577                 if (vflag) {
 578                         TCHECK(dp->icmp6_data16[0]);
 579                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 580                         if (dp->icmp6_data16[1] & 0xc0)
 581                                 printf(" ");
 582                         if (dp->icmp6_data16[1] & 0x80)
 583                                 printf("M");
 584                         if (dp->icmp6_data16[1] & 0x40)
 585                                 printf("O");
 586 #define MPADVLEN 8
 587                         icmp6_opt_print((const u_char *)dp + MPADVLEN,
 588                                         length - MPADVLEN);
 589                 }
 590                 break;
 591         case ND_RPL_MESSAGE:
 592                 rpl_print(ndo, dp, &dp->icmp6_data8[0], length);
 593                 break;
 594         default:
 595                 printf(", length %u", length);
 596                 if (vflag <= 1)
 597                     print_unknown_data(bp,"\n\t", length);
 598                 return;
 599         }
 600         if (!vflag)
 601             printf(", length %u", length);
 602         return;
 603 trunc:
 604         fputs("[|icmp6]", stdout);
 605 }
 606
 607 static struct udphdr *
 608 get_upperlayer(u_char *bp, u_int *prot)
 609 {
 610         const u_char *ep;
 611         struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
 612         struct udphdr *uh;
 613         struct ip6_hbh *hbh;
 614         struct ip6_frag *fragh;
 615         struct ah *ah;
 616         u_int nh;
 617         int hlen;
 618
 619         /* 'ep' points to the end of available data. */
 620         ep = snapend;
 621
 622         if (!TTEST(ip6->ip6_nxt))
 623                 return NULL;
 624
 625         nh = ip6->ip6_nxt;
 626         hlen = sizeof(struct ip6_hdr);
 627
 628         while (bp < ep) {
 629                 bp += hlen;
 630
 631                 switch(nh) {
 632                 case IPPROTO_UDP:
 633                 case IPPROTO_TCP:
 634                         uh = (struct udphdr *)bp;
 635                         if (TTEST(uh->uh_dport)) {
 636                                 *prot = nh;
 637                                 return(uh);
 638                         }
 639                         else
 640                                 return(NULL);
 641                         /* NOTREACHED */
 642
 643                 case IPPROTO_HOPOPTS:
 644                 case IPPROTO_DSTOPTS:
 645                 case IPPROTO_ROUTING:
 646                         hbh = (struct ip6_hbh *)bp;
 647                         if (!TTEST(hbh->ip6h_len))
 648                                 return(NULL);
 649                         nh = hbh->ip6h_nxt;
 650                         hlen = (hbh->ip6h_len + 1) << 3;
 651                         break;
 652
 653                 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
 654                         fragh = (struct ip6_frag *)bp;
 655                         if (!TTEST(fragh->ip6f_offlg))
 656                                 return(NULL);
 657                         /* fragments with non-zero offset are meaningless */
 658                         if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
 659                                 return(NULL);
 660                         nh = fragh->ip6f_nxt;
 661                         hlen = sizeof(struct ip6_frag);
 662                         break;
 663
 664                 case IPPROTO_AH:
 665                         ah = (struct ah *)bp;
 666                         if (!TTEST(ah->ah_len))
 667                                 return(NULL);
 668                         nh = ah->ah_nxt;
 669                         hlen = (ah->ah_len + 2) << 2;
 670                         break;
 671
 672                 default:        /* unknown or undecodable header */
 673                         *prot = nh; /* meaningless, but set here anyway */
 674                         return(NULL);
 675                 }
 676         }
 677
 678         return(NULL);           /* should be notreached, though */
 679 }
 680
 681 static void
 682 icmp6_opt_print(const u_char *bp, int resid)
 683 {
 684         const struct nd_opt_hdr *op;
 685         const struct nd_opt_hdr *opl;   /* why there's no struct? */
 686         const struct nd_opt_prefix_info *opp;
 687         const struct icmp6_opts_redirect *opr;
 688         const struct nd_opt_mtu *opm;
 689         const struct nd_opt_rdnss *oprd;
 690         const struct nd_opt_advinterval *opa;
 691         const struct nd_opt_homeagent_info *oph;
 692         const struct nd_opt_route_info *opri;
 693         const u_char *cp, *ep;
 694         struct in6_addr in6, *in6p;
 695         size_t l;
 696         u_int i;
 697
 698 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
 699
 700         cp = bp;
 701         /* 'ep' points to the end of available data. */
 702         ep = snapend;
 703
 704         while (cp < ep) {
 705                 op = (struct nd_opt_hdr *)cp;
 706
 707                 ECHECK(op->nd_opt_len);
 708                 if (resid <= 0)
 709                         return;
 710                 if (op->nd_opt_len == 0)
 711                         goto trunc;
 712                 if (cp + (op->nd_opt_len << 3) > ep)
 713                         goto trunc;
 714
 715                 printf("\n\t  %s option (%u), length %u (%u): ",
 716                        tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
 717                        op->nd_opt_type,
 718                        op->nd_opt_len << 3,
 719                        op->nd_opt_len);
 720
 721                 switch (op->nd_opt_type) {
 722                 case ND_OPT_SOURCE_LINKADDR:
 723                         opl = (struct nd_opt_hdr *)op;
 724                         l = (op->nd_opt_len << 3) - 2;
 725                         print_lladdr(cp + 2, l);
 726                         break;
 727                 case ND_OPT_TARGET_LINKADDR:
 728                         opl = (struct nd_opt_hdr *)op;
 729                         l = (op->nd_opt_len << 3) - 2;
 730                         print_lladdr(cp + 2, l);
 731                         break;
 732                 case ND_OPT_PREFIX_INFORMATION:
 733                         opp = (struct nd_opt_prefix_info *)op;
 734                         TCHECK(opp->nd_opt_pi_prefix);
 735                         printf("%s/%u%s, Flags [%s], valid time %ss",
 736                                ip6addr_string(&opp->nd_opt_pi_prefix),
 737                                opp->nd_opt_pi_prefix_len,
 738                                (op->nd_opt_len != 4) ? "badlen" : "",
 739                                bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
 740                                get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)));
 741                         printf(", pref. time %ss", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)));
 742                         break;
 743                 case ND_OPT_REDIRECTED_HEADER:
 744                         opr = (struct icmp6_opts_redirect *)op;
 745                         print_unknown_data(bp,"\n\t    ",op->nd_opt_len<<3);
 746                         /* xxx */
 747                         break;
 748                 case ND_OPT_MTU:
 749                         opm = (struct nd_opt_mtu *)op;
 750                         TCHECK(opm->nd_opt_mtu_mtu);
 751                         printf(" %u%s",
 752                                EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
 753                                (op->nd_opt_len != 1) ? "bad option length" : "" );
 754                         break;
 755                 case ND_OPT_RDNSS:
 756                         oprd = (struct nd_opt_rdnss *)op;
 757                         l = (op->nd_opt_len - 1) / 2;
 758                         printf(" lifetime %us,",
 759                                 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime));
 760                         for (i = 0; i < l; i++) {
 761                                 TCHECK(oprd->nd_opt_rdnss_addr[i]);
 762                                 printf(" addr: %s",
 763                                     ip6addr_string(&oprd->nd_opt_rdnss_addr[i]));
 764                         }
 765                         break;
 766                 case ND_OPT_ADVINTERVAL:
 767                         opa = (struct nd_opt_advinterval *)op;
 768                         TCHECK(opa->nd_opt_adv_interval);
 769                         printf(" %us", EXTRACT_32BITS(&opa->nd_opt_adv_interval));
 770                         break;
 771                 case ND_OPT_HOMEAGENT_INFO:
 772                         oph = (struct nd_opt_homeagent_info *)op;
 773                         TCHECK(oph->nd_opt_hai_lifetime);
 774                         printf(" preference %u, lifetime %u",
 775                                EXTRACT_16BITS(&oph->nd_opt_hai_preference),
 776                                EXTRACT_16BITS(&oph->nd_opt_hai_lifetime));
 777                         break;
 778                 case ND_OPT_ROUTE_INFO:
 779                         opri = (struct nd_opt_route_info *)op;
 780                         TCHECK(opri->nd_opt_rti_lifetime);
 781                         memset(&in6, 0, sizeof(in6));
 782                         in6p = (struct in6_addr *)(opri + 1);
 783                         switch (op->nd_opt_len) {
 784                         case 1:
 785                                 break;
 786                         case 2:
 787                                 TCHECK2(*in6p, 8);
 788                                 memcpy(&in6, opri + 1, 8);
 789                                 break;
 790                         case 3:
 791                                 TCHECK(*in6p);
 792                                 memcpy(&in6, opri + 1, sizeof(in6));
 793                                 break;
 794                         default:
 795                                 goto trunc;
 796                         }
 797                         printf(" %s/%u", ip6addr_string(&in6),
 798                             opri->nd_opt_rti_prefixlen);
 799                         printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
 800                         printf(", lifetime=%s",
 801                             get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)));
 802                         break;
 803                 default:
 804                         if (vflag <= 1) {
 805                             print_unknown_data(cp+2,"\n\t  ", (op->nd_opt_len << 3) - 2); /* skip option header */
 806                             return;
 807                         }
 808                         break;
 809                 }
 810                 /* do we want to see an additional hexdump ? */
 811                 if (vflag> 1)
 812                     print_unknown_data(cp+2,"\n\t    ", (op->nd_opt_len << 3) - 2); /* skip option header */
 813
 814                 cp += op->nd_opt_len << 3;
 815                 resid -= op->nd_opt_len << 3;
 816         }
 817         return;
 818
 819  trunc:
 820         fputs("[ndp opt]", stdout);
 821         return;
 822 #undef ECHECK
 823 }
 824
 825 static void
 826 mld6_print(const u_char *bp)
 827 {
 828         struct mld6_hdr *mp = (struct mld6_hdr *)bp;
 829         const u_char *ep;
 830
 831         /* 'ep' points to the end of available data. */
 832         ep = snapend;
 833
 834         if ((u_char *)mp + sizeof(*mp) > ep)
 835                 return;
 836
 837         printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay));
 838         printf("addr: %s", ip6addr_string(&mp->mld6_addr));
 839 }
 840
 841 static void
 842 mldv2_report_print(const u_char *bp, u_int len)
 843 {
 844     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
 845     u_int group, nsrcs, ngroups;
 846     u_int i, j;
 847
 848     /* Minimum len is 8 */
 849     if (len < 8) {
 850         printf(" [invalid len %d]", len);
 851         return;
 852     }
 853
 854     TCHECK(icp->icmp6_data16[1]);
 855     ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
 856     printf(", %d group record(s)", ngroups);
 857     if (vflag > 0) {
 858         /* Print the group records */
 859         group = 8;
 860         for (i = 0; i < ngroups; i++) {
 861             /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
 862             if (len < group + 20) {
 863                 printf(" [invalid number of groups]");
 864                 return;
 865             }
 866             TCHECK2(bp[group + 4], sizeof(struct in6_addr));
 867             printf(" [gaddr %s", ip6addr_string(&bp[group + 4]));
 868             printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]",
 869                                                                 bp[group]));
 870             nsrcs = (bp[group + 2] << 8) + bp[group + 3];
 871             /* Check the number of sources and print them */
 872             if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
 873                 printf(" [invalid number of sources %d]", nsrcs);
 874                 return;
 875             }
 876             if (vflag == 1)
 877                 printf(", %d source(s)", nsrcs);
 878             else {
 879                 /* Print the sources */
 880                 (void)printf(" {");
 881                 for (j = 0; j < nsrcs; j++) {
 882                     TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
 883                             sizeof(struct in6_addr));
 884                     printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)]));
 885                 }
 886                 (void)printf(" }");
 887             }
 888             /* Next group record */
 889             group += 20 + nsrcs * sizeof(struct in6_addr);
 890             printf("]");
 891         }
 892     }
 893     return;
 894 trunc:
 895     (void)printf("[|icmp6]");
 896     return;
 897 }
 898
 899 static void
 900 mldv2_query_print(const u_char *bp, u_int len)
 901 {
 902     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
 903     u_int mrc;
 904     int mrt, qqi;
 905     u_int nsrcs;
 906     register u_int i;
 907
 908     /* Minimum len is 28 */
 909     if (len < 28) {
 910         printf(" [invalid len %d]", len);
 911         return;
 912     }
 913     TCHECK(icp->icmp6_data16[0]);
 914     mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
 915     if (mrc < 32768) {
 916         mrt = mrc;
 917     } else {
 918         mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
 919     }
 920     if (vflag) {
 921         (void)printf(" [max resp delay=%d]", mrt);
 922     }
 923     TCHECK2(bp[8], sizeof(struct in6_addr));
 924     printf(" [gaddr %s", ip6addr_string(&bp[8]));
 925
 926     if (vflag) {
 927         TCHECK(bp[25]);
 928         if (bp[24] & 0x08) {
 929                 printf(" sflag");
 930         }
 931         if (bp[24] & 0x07) {
 932                 printf(" robustness=%d", bp[24] & 0x07);
 933         }
 934         if (bp[25] < 128) {
 935                 qqi = bp[25];
 936         } else {
 937                 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
 938         }
 939         printf(" qqi=%d", qqi);
 940     }
 941
 942     TCHECK2(bp[26], 2);
 943     nsrcs = EXTRACT_16BITS(&bp[26]);
 944     if (nsrcs > 0) {
 945         if (len < 28 + nsrcs * sizeof(struct in6_addr))
 946             printf(" [invalid number of sources]");
 947         else if (vflag > 1) {
 948             printf(" {");
 949             for (i = 0; i < nsrcs; i++) {
 950                 TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
 951                         sizeof(struct in6_addr));
 952                 printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)]));
 953             }
 954             printf(" }");
 955         } else
 956             printf(", %d source(s)", nsrcs);
 957     }
 958     printf("]");
 959     return;
 960 trunc:
 961     (void)printf("[|icmp6]");
 962     return;
 963 }
 964
 965 static void
 966 dnsname_print(const u_char *cp, const u_char *ep)
 967 {
 968         int i;
 969
 970         /* DNS name decoding - no decompression */
 971         printf(", \"");
 972         while (cp < ep) {
 973                 i = *cp++;
 974                 if (i) {
 975                         if (i > ep - cp) {
 976                                 printf("???");
 977                                 break;
 978                         }
 979                         while (i-- && cp < ep) {
 980                                 safeputchar(*cp);
 981                                 cp++;
 982                         }
 983                         if (cp + 1 < ep && *cp)
 984                                 printf(".");
 985                 } else {
 986                         if (cp == ep) {
 987                                 /* FQDN */
 988                                 printf(".");
 989                         } else if (cp + 1 == ep && *cp == '\0') {
 990                                 /* truncated */
 991                         } else {
 992                                 /* invalid */
 993                                 printf("???");
 994                         }
 995                         break;
 996                 }
 997         }
 998         printf("\"");
 999 }
1000
1001 static void
1002 icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep)
1003 {
1004         struct icmp6_nodeinfo *ni6;
1005         struct icmp6_hdr *dp;
1006         const u_char *cp;
1007         size_t siz, i;
1008         int needcomma;
1009
1010         if (ep < bp)
1011                 return;
1012         dp = (struct icmp6_hdr *)bp;
1013         ni6 = (struct icmp6_nodeinfo *)bp;
1014         siz = ep - bp;
1015
1016         switch (ni6->ni_type) {
1017         case ICMP6_NI_QUERY:
1018                 if (siz == sizeof(*dp) + 4) {
1019                         /* KAME who-are-you */
1020                         printf(" who-are-you request");
1021                         break;
1022                 }
1023                 printf(" node information query");
1024
1025                 TCHECK2(*dp, sizeof(*ni6));
1026                 ni6 = (struct icmp6_nodeinfo *)dp;
1027                 printf(" (");   /*)*/
1028                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1029                 case NI_QTYPE_NOOP:
1030                         printf("noop");
1031                         break;
1032                 case NI_QTYPE_SUPTYPES:
1033                         printf("supported qtypes");
1034                         i = EXTRACT_16BITS(&ni6->ni_flags);
1035                         if (i)
1036                                 printf(" [%s]", (i & 0x01) ? "C" : "");
1037                         break;
1038                         break;
1039                 case NI_QTYPE_FQDN:
1040                         printf("DNS name");
1041                         break;
1042                 case NI_QTYPE_NODEADDR:
1043                         printf("node addresses");
1044                         i = ni6->ni_flags;
1045                         if (!i)
1046                                 break;
1047                         /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1048                         printf(" [%s%s%s%s%s%s]",
1049                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1050                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1051                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1052                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1053                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1054                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
1055                         break;
1056                 default:
1057                         printf("unknown");
1058                         break;
1059                 }
1060
1061                 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1062                     ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1063                         if (siz != sizeof(*ni6))
1064                                 if (vflag)
1065                                         printf(", invalid len");
1066                         /*(*/
1067                         printf(")");
1068                         break;
1069                 }
1070
1071
1072                 /* XXX backward compat, icmp-name-lookup-03 */
1073                 if (siz == sizeof(*ni6)) {
1074                         printf(", 03 draft");
1075                         /*(*/
1076                         printf(")");
1077                         break;
1078                 }
1079
1080                 switch (ni6->ni_code) {
1081                 case ICMP6_NI_SUBJ_IPV6:
1082                         if (!TTEST2(*dp,
1083                             sizeof(*ni6) + sizeof(struct in6_addr)))
1084                                 break;
1085                         if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1086                                 if (vflag)
1087                                         printf(", invalid subject len");
1088                                 break;
1089                         }
1090                         printf(", subject=%s",
1091                             getname6((const u_char *)(ni6 + 1)));
1092                         break;
1093                 case ICMP6_NI_SUBJ_FQDN:
1094                         printf(", subject=DNS name");
1095                         cp = (const u_char *)(ni6 + 1);
1096                         if (cp[0] == ep - cp - 1) {
1097                                 /* icmp-name-lookup-03, pascal string */
1098                                 if (vflag)
1099                                         printf(", 03 draft");
1100                                 cp++;
1101                                 printf(", \"");
1102                                 while (cp < ep) {
1103                                         safeputchar(*cp);
1104                                         cp++;
1105                                 }
1106                                 printf("\"");
1107                         } else
1108                                 dnsname_print(cp, ep);
1109                         break;
1110                 case ICMP6_NI_SUBJ_IPV4:
1111                         if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1112                                 break;
1113                         if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1114                                 if (vflag)
1115                                         printf(", invalid subject len");
1116                                 break;
1117                         }
1118                         printf(", subject=%s",
1119                             getname((const u_char *)(ni6 + 1)));
1120                         break;
1121                 default:
1122                         printf(", unknown subject");
1123                         break;
1124                 }
1125
1126                 /*(*/
1127                 printf(")");
1128                 break;
1129
1130         case ICMP6_NI_REPLY:
1131                 if (icmp6len > siz) {
1132                         printf("[|icmp6: node information reply]");
1133                         break;
1134                 }
1135
1136                 needcomma = 0;
1137
1138                 ni6 = (struct icmp6_nodeinfo *)dp;
1139                 printf(" node information reply");
1140                 printf(" (");   /*)*/
1141                 switch (ni6->ni_code) {
1142                 case ICMP6_NI_SUCCESS:
1143                         if (vflag) {
1144                                 printf("success");
1145                                 needcomma++;
1146                         }
1147                         break;
1148                 case ICMP6_NI_REFUSED:
1149                         printf("refused");
1150                         needcomma++;
1151                         if (siz != sizeof(*ni6))
1152                                 if (vflag)
1153                                         printf(", invalid length");
1154                         break;
1155                 case ICMP6_NI_UNKNOWN:
1156                         printf("unknown");
1157                         needcomma++;
1158                         if (siz != sizeof(*ni6))
1159                                 if (vflag)
1160                                         printf(", invalid length");
1161                         break;
1162                 }
1163
1164                 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1165                         /*(*/
1166                         printf(")");
1167                         break;
1168                 }
1169
1170                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1171                 case NI_QTYPE_NOOP:
1172                         if (needcomma)
1173                                 printf(", ");
1174                         printf("noop");
1175                         if (siz != sizeof(*ni6))
1176                                 if (vflag)
1177                                         printf(", invalid length");
1178                         break;
1179                 case NI_QTYPE_SUPTYPES:
1180                         if (needcomma)
1181                                 printf(", ");
1182                         printf("supported qtypes");
1183                         i = EXTRACT_16BITS(&ni6->ni_flags);
1184                         if (i)
1185                                 printf(" [%s]", (i & 0x01) ? "C" : "");
1186                         break;
1187                 case NI_QTYPE_FQDN:
1188                         if (needcomma)
1189                                 printf(", ");
1190                         printf("DNS name");
1191                         cp = (const u_char *)(ni6 + 1) + 4;
1192                         if (cp[0] == ep - cp - 1) {
1193                                 /* icmp-name-lookup-03, pascal string */
1194                                 if (vflag)
1195                                         printf(", 03 draft");
1196                                 cp++;
1197                                 printf(", \"");
1198                                 while (cp < ep) {
1199                                         safeputchar(*cp);
1200                                         cp++;
1201                                 }
1202                                 printf("\"");
1203                         } else
1204                                 dnsname_print(cp, ep);
1205                         if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1206                                 printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
1207                         break;
1208                 case NI_QTYPE_NODEADDR:
1209                         if (needcomma)
1210                                 printf(", ");
1211                         printf("node addresses");
1212                         i = sizeof(*ni6);
1213                         while (i < siz) {
1214                                 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1215                                         break;
1216                                 printf(" %s", getname6(bp + i));
1217                                 i += sizeof(struct in6_addr);
1218                                 printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i));
1219                                 i += sizeof(int32_t);
1220                         }
1221                         i = ni6->ni_flags;
1222                         if (!i)
1223                                 break;
1224                         printf(" [%s%s%s%s%s%s%s]",
1225                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1226                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1227                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1228                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1229                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1230                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1231                             (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1232                         break;
1233                 default:
1234                         if (needcomma)
1235                                 printf(", ");
1236                         printf("unknown");
1237                         break;
1238                 }
1239
1240                 /*(*/
1241                 printf(")");
1242                 break;
1243         }
1244         return;
1245
1246 trunc:
1247         fputs("[|icmp6]", stdout);
1248 }
1249
1250 static void
1251 icmp6_rrenum_print(const u_char *bp, const u_char *ep)
1252 {
1253         struct icmp6_router_renum *rr6;
1254         const char *cp;
1255         struct rr_pco_match *match;
1256         struct rr_pco_use *use;
1257         char hbuf[NI_MAXHOST];
1258         int n;
1259
1260         if (ep < bp)
1261                 return;
1262         rr6 = (struct icmp6_router_renum *)bp;
1263         cp = (const char *)(rr6 + 1);
1264
1265         TCHECK(rr6->rr_reserved);
1266         switch (rr6->rr_code) {
1267         case ICMP6_ROUTER_RENUMBERING_COMMAND:
1268                 printf("router renum: command");
1269                 break;
1270         case ICMP6_ROUTER_RENUMBERING_RESULT:
1271                 printf("router renum: result");
1272                 break;
1273         case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1274                 printf("router renum: sequence number reset");
1275                 break;
1276         default:
1277                 printf("router renum: code-#%d", rr6->rr_code);
1278                 break;
1279         }
1280
1281         printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum));
1282
1283         if (vflag) {
1284 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1285                 printf("[");    /*]*/
1286                 if (rr6->rr_flags) {
1287                         printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1288                             F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1289                             F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1290                             F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1291                             F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1292                 }
1293                 printf("seg=%u,", rr6->rr_segnum);
1294                 printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay));
1295                 if (rr6->rr_reserved)
1296                         printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved));
1297                 /*[*/
1298                 printf("]");
1299 #undef F
1300         }
1301
1302         if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1303                 match = (struct rr_pco_match *)cp;
1304                 cp = (const char *)(match + 1);
1305
1306                 TCHECK(match->rpm_prefix);
1307
1308                 if (vflag > 1)
1309                         printf("\n\t");
1310                 else
1311                         printf(" ");
1312                 printf("match(");       /*)*/
1313                 switch (match->rpm_code) {
1314                 case RPM_PCO_ADD:       printf("add"); break;
1315                 case RPM_PCO_CHANGE:    printf("change"); break;
1316                 case RPM_PCO_SETGLOBAL: printf("setglobal"); break;
1317                 default:                printf("#%u", match->rpm_code); break;
1318                 }
1319
1320                 if (vflag) {
1321                         printf(",ord=%u", match->rpm_ordinal);
1322                         printf(",min=%u", match->rpm_minlen);
1323                         printf(",max=%u", match->rpm_maxlen);
1324                 }
1325                 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1326                         printf(",%s/%u", hbuf, match->rpm_matchlen);
1327                 else
1328                         printf(",?/%u", match->rpm_matchlen);
1329                 /*(*/
1330                 printf(")");
1331
1332                 n = match->rpm_len - 3;
1333                 if (n % 4)
1334                         goto trunc;
1335                 n /= 4;
1336                 while (n-- > 0) {
1337                         use = (struct rr_pco_use *)cp;
1338                         cp = (const char *)(use + 1);
1339
1340                         TCHECK(use->rpu_prefix);
1341
1342                         if (vflag > 1)
1343                                 printf("\n\t");
1344                         else
1345                                 printf(" ");
1346                         printf("use("); /*)*/
1347                         if (use->rpu_flags) {
1348 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1349                                 printf("%s%s,",
1350                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1351                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
1352 #undef F
1353                         }
1354                         if (vflag) {
1355                                 printf("mask=0x%x,", use->rpu_ramask);
1356                                 printf("raflags=0x%x,", use->rpu_raflags);
1357                                 if (~use->rpu_vltime == 0)
1358                                         printf("vltime=infty,");
1359                                 else
1360                                         printf("vltime=%u,",
1361                                             EXTRACT_32BITS(&use->rpu_vltime));
1362                                 if (~use->rpu_pltime == 0)
1363                                         printf("pltime=infty,");
1364                                 else
1365                                         printf("pltime=%u,",
1366                                             EXTRACT_32BITS(&use->rpu_pltime));
1367                         }
1368                         if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1369                             sizeof(hbuf)))
1370                                 printf("%s/%u/%u", hbuf, use->rpu_uselen,
1371                                     use->rpu_keeplen);
1372                         else
1373                                 printf("?/%u/%u", use->rpu_uselen,
1374                                     use->rpu_keeplen);
1375                         /*(*/
1376                         printf(")");
1377                 }
1378         }
1379
1380         return;
1381
1382 trunc:
1383         fputs("[|icmp6]", stdout);
1384 }
1385
1386 #endif /* INET6 */