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 ==
 354                       ND_ROUTER_SOLICIT ||
 355                       ND_ROUTER_ADVERT ||
 356                       ND_NEIGHBOR_ADVERT ||
 357                       ND_NEIGHBOR_SOLICIT ||
 358                       ND_REDIRECT ||
 359                       ICMP6_HADISCOV_REPLY ||
 360                       ICMP6_MOBILEPREFIX_ADVERT ))
 361             printf(", length %u", length);
 362
 363         switch (dp->icmp6_type) {
 364         case ICMP6_DST_UNREACH:
 365                 TCHECK(oip->ip6_dst);
 366                 printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code));
 367                 switch (dp->icmp6_code) {
 368
 369                 case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
 370                 case ICMP6_DST_UNREACH_ADMIN:
 371                 case ICMP6_DST_UNREACH_ADDR:
 372                         printf(" %s",ip6addr_string(&oip->ip6_dst));
 373                         break;
 374                 case ICMP6_DST_UNREACH_BEYONDSCOPE:
 375                         printf(" %s, source address %s",
 376                                ip6addr_string(&oip->ip6_dst),
 377                                ip6addr_string(&oip->ip6_src));
 378                         break;
 379                 case ICMP6_DST_UNREACH_NOPORT:
 380                         if ((ouh = get_upperlayer((u_char *)oip, &prot))
 381                             == NULL)
 382                                 goto trunc;
 383
 384                         dport = EXTRACT_16BITS(&ouh->uh_dport);
 385                         switch (prot) {
 386                         case IPPROTO_TCP:
 387                                 printf(", %s tcp port %s",
 388                                         ip6addr_string(&oip->ip6_dst),
 389                                         tcpport_string(dport));
 390                                 break;
 391                         case IPPROTO_UDP:
 392                                 printf(", %s udp port %s",
 393                                         ip6addr_string(&oip->ip6_dst),
 394                                         udpport_string(dport));
 395                                 break;
 396                         default:
 397                                 printf(", %s protocol %d port %d unreachable",
 398                                         ip6addr_string(&oip->ip6_dst),
 399                                         oip->ip6_nxt, dport);
 400                                 break;
 401                         }
 402                         break;
 403                 default:
 404                     if (vflag <= 1) {
 405                             print_unknown_data(bp,"\n\t",length);
 406                             return;
 407                     }
 408                     break;
 409                 }
 410                 break;
 411         case ICMP6_PACKET_TOO_BIG:
 412                 TCHECK(dp->icmp6_mtu);
 413                 printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu));
 414                 break;
 415         case ICMP6_TIME_EXCEEDED:
 416                 TCHECK(oip->ip6_dst);
 417                 switch (dp->icmp6_code) {
 418                 case ICMP6_TIME_EXCEED_TRANSIT:
 419                         printf(" for %s",
 420                                 ip6addr_string(&oip->ip6_dst));
 421                         break;
 422                 case ICMP6_TIME_EXCEED_REASSEMBLY:
 423                         printf(" (reassembly)");
 424                         break;
 425                 default:
 426                         printf(", unknown code (%u)", dp->icmp6_code);
 427                         break;
 428                 }
 429                 break;
 430         case ICMP6_PARAM_PROB:
 431                 TCHECK(oip->ip6_dst);
 432                 switch (dp->icmp6_code) {
 433                 case ICMP6_PARAMPROB_HEADER:
 434                         printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 435                         break;
 436                 case ICMP6_PARAMPROB_NEXTHEADER:
 437                         printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 438                         break;
 439                 case ICMP6_PARAMPROB_OPTION:
 440                         printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
 441                         break;
 442                 default:
 443                         printf(", code-#%d",
 444                                dp->icmp6_code);
 445                         break;
 446                 }
 447                 break;
 448         case ICMP6_ECHO_REQUEST:
 449         case ICMP6_ECHO_REPLY:
 450                 TCHECK(dp->icmp6_seq);
 451                 printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq));
 452                 break;
 453         case ICMP6_MEMBERSHIP_QUERY:
 454                 if (length == MLD_MINLEN) {
 455                         mld6_print((const u_char *)dp);
 456                 } else if (length >= MLDV2_MINLEN) {
 457                         printf("v2 ");
 458                         mldv2_query_print((const u_char *)dp, length);
 459                 } else {
 460                         printf(" unknown-version (len %u) ", length);
 461                 }
 462                 break;
 463         case ICMP6_MEMBERSHIP_REPORT:
 464                 mld6_print((const u_char *)dp);
 465                 break;
 466         case ICMP6_MEMBERSHIP_REDUCTION:
 467                 mld6_print((const u_char *)dp);
 468                 break;
 469         case ND_ROUTER_SOLICIT:
 470 #define RTSOLLEN 8
 471                 if (vflag) {
 472                         icmp6_opt_print((const u_char *)dp + RTSOLLEN,
 473                                         length - RTSOLLEN);
 474                 }
 475                 break;
 476         case ND_ROUTER_ADVERT:
 477 #define RTADVLEN 16
 478                 if (vflag) {
 479                         struct nd_router_advert *p;
 480
 481                         p = (struct nd_router_advert *)dp;
 482                         TCHECK(p->nd_ra_retransmit);
 483                         printf("\n\thop limit %u, Flags [%s]" \
 484                                ", pref %s, router lifetime %us, reachable time %us, retrans time %us",
 485                                (u_int)p->nd_ra_curhoplimit,
 486                                bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
 487                                get_rtpref(p->nd_ra_flags_reserved),
 488                                EXTRACT_16BITS(&p->nd_ra_router_lifetime),
 489                                EXTRACT_32BITS(&p->nd_ra_reachable),
 490                                EXTRACT_32BITS(&p->nd_ra_retransmit));
 491
 492                         icmp6_opt_print((const u_char *)dp + RTADVLEN,
 493                                         length - RTADVLEN);
 494                 }
 495                 break;
 496         case ND_NEIGHBOR_SOLICIT:
 497             {
 498                 struct nd_neighbor_solicit *p;
 499                 p = (struct nd_neighbor_solicit *)dp;
 500                 TCHECK(p->nd_ns_target);
 501                 printf(", who has %s", ip6addr_string(&p->nd_ns_target));
 502                 if (vflag) {
 503 #define NDSOLLEN 24
 504                         icmp6_opt_print((const u_char *)dp + NDSOLLEN,
 505                                         length - NDSOLLEN);
 506                 }
 507             }
 508                 break;
 509         case ND_NEIGHBOR_ADVERT:
 510             {
 511                 struct nd_neighbor_advert *p;
 512
 513                 p = (struct nd_neighbor_advert *)dp;
 514                 TCHECK(p->nd_na_target);
 515                 printf(", tgt is %s",
 516                         ip6addr_string(&p->nd_na_target));
 517                 if (vflag) {
 518                         printf(", Flags [%s]",
 519                                bittok2str(icmp6_nd_na_flag_values,
 520                                           "none",
 521                                           EXTRACT_32BITS(&p->nd_na_flags_reserved)));
 522 #define NDADVLEN 24
 523                         icmp6_opt_print((const u_char *)dp + NDADVLEN,
 524                                         length - NDADVLEN);
 525 #undef NDADVLEN
 526                 }
 527             }
 528                 break;
 529         case ND_REDIRECT:
 530 #define RDR(i) ((struct nd_redirect *)(i))
 531                 TCHECK(RDR(dp)->nd_rd_dst);
 532                 printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst));
 533                 TCHECK(RDR(dp)->nd_rd_target);
 534                 printf(" to %s",
 535                     getname6((const u_char*)&RDR(dp)->nd_rd_target));
 536 #define REDIRECTLEN 40
 537                 if (vflag) {
 538                         icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
 539                                         length - REDIRECTLEN);
 540                 }
 541                 break;
 542 #undef REDIRECTLEN
 543 #undef RDR
 544         case ICMP6_ROUTER_RENUMBERING:
 545                 icmp6_rrenum_print(bp, ep);
 546                 break;
 547         case ICMP6_NI_QUERY:
 548         case ICMP6_NI_REPLY:
 549                 icmp6_nodeinfo_print(length, bp, ep);
 550                 break;
 551         case IND_SOLICIT:
 552         case IND_ADVERT:
 553                 break;
 554         case ICMP6_V2_MEMBERSHIP_REPORT:
 555                 mldv2_report_print((const u_char *) dp, length);
 556                 break;
 557         case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
 558         case ICMP6_HADISCOV_REQUEST:
 559                 TCHECK(dp->icmp6_data16[0]);
 560                 printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 561                 break;
 562         case ICMP6_HADISCOV_REPLY:
 563                 if (vflag) {
 564                         struct in6_addr *in6;
 565                         u_char *cp;
 566
 567                         TCHECK(dp->icmp6_data16[0]);
 568                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 569                         cp = (u_char *)dp + length;
 570                         in6 = (struct in6_addr *)(dp + 1);
 571                         for (; (u_char *)in6 < cp; in6++) {
 572                                 TCHECK(*in6);
 573                                 printf(", %s", ip6addr_string(in6));
 574                         }
 575                 }
 576                 break;
 577         case ICMP6_MOBILEPREFIX_ADVERT:
 578                 if (vflag) {
 579                         TCHECK(dp->icmp6_data16[0]);
 580                         printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
 581                         if (dp->icmp6_data16[1] & 0xc0)
 582                                 printf(" ");
 583                         if (dp->icmp6_data16[1] & 0x80)
 584                                 printf("M");
 585                         if (dp->icmp6_data16[1] & 0x40)
 586                                 printf("O");
 587 #define MPADVLEN 8
 588                         icmp6_opt_print((const u_char *)dp + MPADVLEN,
 589                                         length - MPADVLEN);
 590                 }
 591                 break;
 592         case ND_RPL_MESSAGE:
 593                 rpl_print(ndo, dp, &dp->icmp6_data8[0], length);
 594                 break;
 595         default:
 596                 printf(", length %u", length);
 597                 if (vflag <= 1)
 598                     print_unknown_data(bp,"\n\t", length);
 599                 return;
 600         }
 601         if (!vflag)
 602             printf(", length %u", length);
 603         return;
 604 trunc:
 605         fputs("[|icmp6]", stdout);
 606 }
 607
 608 static struct udphdr *
 609 get_upperlayer(u_char *bp, u_int *prot)
 610 {
 611         const u_char *ep;
 612         struct ip6_hdr *ip6 = (struct ip6_hdr *)bp;
 613         struct udphdr *uh;
 614         struct ip6_hbh *hbh;
 615         struct ip6_frag *fragh;
 616         struct ah *ah;
 617         u_int nh;
 618         int hlen;
 619
 620         /* 'ep' points to the end of available data. */
 621         ep = snapend;
 622
 623         if (!TTEST(ip6->ip6_nxt))
 624                 return NULL;
 625
 626         nh = ip6->ip6_nxt;
 627         hlen = sizeof(struct ip6_hdr);
 628
 629         while (bp < ep) {
 630                 bp += hlen;
 631
 632                 switch(nh) {
 633                 case IPPROTO_UDP:
 634                 case IPPROTO_TCP:
 635                         uh = (struct udphdr *)bp;
 636                         if (TTEST(uh->uh_dport)) {
 637                                 *prot = nh;
 638                                 return(uh);
 639                         }
 640                         else
 641                                 return(NULL);
 642                         /* NOTREACHED */
 643
 644                 case IPPROTO_HOPOPTS:
 645                 case IPPROTO_DSTOPTS:
 646                 case IPPROTO_ROUTING:
 647                         hbh = (struct ip6_hbh *)bp;
 648                         if (!TTEST(hbh->ip6h_len))
 649                                 return(NULL);
 650                         nh = hbh->ip6h_nxt;
 651                         hlen = (hbh->ip6h_len + 1) << 3;
 652                         break;
 653
 654                 case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
 655                         fragh = (struct ip6_frag *)bp;
 656                         if (!TTEST(fragh->ip6f_offlg))
 657                                 return(NULL);
 658                         /* fragments with non-zero offset are meaningless */
 659                         if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
 660                                 return(NULL);
 661                         nh = fragh->ip6f_nxt;
 662                         hlen = sizeof(struct ip6_frag);
 663                         break;
 664
 665                 case IPPROTO_AH:
 666                         ah = (struct ah *)bp;
 667                         if (!TTEST(ah->ah_len))
 668                                 return(NULL);
 669                         nh = ah->ah_nxt;
 670                         hlen = (ah->ah_len + 2) << 2;
 671                         break;
 672
 673                 default:        /* unknown or undecodable header */
 674                         *prot = nh; /* meaningless, but set here anyway */
 675                         return(NULL);
 676                 }
 677         }
 678
 679         return(NULL);           /* should be notreached, though */
 680 }
 681
 682 static void
 683 icmp6_opt_print(const u_char *bp, int resid)
 684 {
 685         const struct nd_opt_hdr *op;
 686         const struct nd_opt_hdr *opl;   /* why there's no struct? */
 687         const struct nd_opt_prefix_info *opp;
 688         const struct icmp6_opts_redirect *opr;
 689         const struct nd_opt_mtu *opm;
 690         const struct nd_opt_rdnss *oprd;
 691         const struct nd_opt_advinterval *opa;
 692         const struct nd_opt_homeagent_info *oph;
 693         const struct nd_opt_route_info *opri;
 694         const u_char *cp, *ep;
 695         struct in6_addr in6, *in6p;
 696         size_t l;
 697         u_int i;
 698
 699 #define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
 700
 701         cp = bp;
 702         /* 'ep' points to the end of available data. */
 703         ep = snapend;
 704
 705         while (cp < ep) {
 706                 op = (struct nd_opt_hdr *)cp;
 707
 708                 ECHECK(op->nd_opt_len);
 709                 if (resid <= 0)
 710                         return;
 711                 if (op->nd_opt_len == 0)
 712                         goto trunc;
 713                 if (cp + (op->nd_opt_len << 3) > ep)
 714                         goto trunc;
 715
 716                 printf("\n\t  %s option (%u), length %u (%u): ",
 717                        tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
 718                        op->nd_opt_type,
 719                        op->nd_opt_len << 3,
 720                        op->nd_opt_len);
 721
 722                 switch (op->nd_opt_type) {
 723                 case ND_OPT_SOURCE_LINKADDR:
 724                         opl = (struct nd_opt_hdr *)op;
 725                         l = (op->nd_opt_len << 3) - 2;
 726                         print_lladdr(cp + 2, l);
 727                         break;
 728                 case ND_OPT_TARGET_LINKADDR:
 729                         opl = (struct nd_opt_hdr *)op;
 730                         l = (op->nd_opt_len << 3) - 2;
 731                         print_lladdr(cp + 2, l);
 732                         break;
 733                 case ND_OPT_PREFIX_INFORMATION:
 734                         opp = (struct nd_opt_prefix_info *)op;
 735                         TCHECK(opp->nd_opt_pi_prefix);
 736                         printf("%s/%u%s, Flags [%s], valid time %ss",
 737                                ip6addr_string(&opp->nd_opt_pi_prefix),
 738                                opp->nd_opt_pi_prefix_len,
 739                                (op->nd_opt_len != 4) ? "badlen" : "",
 740                                bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
 741                                get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time)));
 742                         printf(", pref. time %ss", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time)));
 743                         break;
 744                 case ND_OPT_REDIRECTED_HEADER:
 745                         opr = (struct icmp6_opts_redirect *)op;
 746                         print_unknown_data(bp,"\n\t    ",op->nd_opt_len<<3);
 747                         /* xxx */
 748                         break;
 749                 case ND_OPT_MTU:
 750                         opm = (struct nd_opt_mtu *)op;
 751                         TCHECK(opm->nd_opt_mtu_mtu);
 752                         printf(" %u%s",
 753                                EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
 754                                (op->nd_opt_len != 1) ? "bad option length" : "" );
 755                         break;
 756                 case ND_OPT_RDNSS:
 757                         oprd = (struct nd_opt_rdnss *)op;
 758                         l = (op->nd_opt_len - 1) / 2;
 759                         printf(" lifetime %us,",
 760                                 EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime));
 761                         for (i = 0; i < l; i++) {
 762                                 TCHECK(oprd->nd_opt_rdnss_addr[i]);
 763                                 printf(" addr: %s",
 764                                     ip6addr_string(&oprd->nd_opt_rdnss_addr[i]));
 765                         }
 766                         break;
 767                 case ND_OPT_ADVINTERVAL:
 768                         opa = (struct nd_opt_advinterval *)op;
 769                         TCHECK(opa->nd_opt_adv_interval);
 770                         printf(" %us", EXTRACT_32BITS(&opa->nd_opt_adv_interval));
 771                         break;
 772                 case ND_OPT_HOMEAGENT_INFO:
 773                         oph = (struct nd_opt_homeagent_info *)op;
 774                         TCHECK(oph->nd_opt_hai_lifetime);
 775                         printf(" preference %u, lifetime %u",
 776                                EXTRACT_16BITS(&oph->nd_opt_hai_preference),
 777                                EXTRACT_16BITS(&oph->nd_opt_hai_lifetime));
 778                         break;
 779                 case ND_OPT_ROUTE_INFO:
 780                         opri = (struct nd_opt_route_info *)op;
 781                         TCHECK(opri->nd_opt_rti_lifetime);
 782                         memset(&in6, 0, sizeof(in6));
 783                         in6p = (struct in6_addr *)(opri + 1);
 784                         switch (op->nd_opt_len) {
 785                         case 1:
 786                                 break;
 787                         case 2:
 788                                 TCHECK2(*in6p, 8);
 789                                 memcpy(&in6, opri + 1, 8);
 790                                 break;
 791                         case 3:
 792                                 TCHECK(*in6p);
 793                                 memcpy(&in6, opri + 1, sizeof(in6));
 794                                 break;
 795                         default:
 796                                 goto trunc;
 797                         }
 798                         printf(" %s/%u", ip6addr_string(&in6),
 799                             opri->nd_opt_rti_prefixlen);
 800                         printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags));
 801                         printf(", lifetime=%s",
 802                             get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime)));
 803                         break;
 804                 default:
 805                         if (vflag <= 1) {
 806                             print_unknown_data(cp+2,"\n\t  ", (op->nd_opt_len << 3) - 2); /* skip option header */
 807                             return;
 808                         }
 809                         break;
 810                 }
 811                 /* do we want to see an additional hexdump ? */
 812                 if (vflag> 1)
 813                     print_unknown_data(cp+2,"\n\t    ", (op->nd_opt_len << 3) - 2); /* skip option header */
 814
 815                 cp += op->nd_opt_len << 3;
 816                 resid -= op->nd_opt_len << 3;
 817         }
 818         return;
 819
 820  trunc:
 821         fputs("[ndp opt]", stdout);
 822         return;
 823 #undef ECHECK
 824 }
 825
 826 static void
 827 mld6_print(const u_char *bp)
 828 {
 829         struct mld6_hdr *mp = (struct mld6_hdr *)bp;
 830         const u_char *ep;
 831
 832         /* 'ep' points to the end of available data. */
 833         ep = snapend;
 834
 835         if ((u_char *)mp + sizeof(*mp) > ep)
 836                 return;
 837
 838         printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay));
 839         printf("addr: %s", ip6addr_string(&mp->mld6_addr));
 840 }
 841
 842 static void
 843 mldv2_report_print(const u_char *bp, u_int len)
 844 {
 845     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
 846     u_int group, nsrcs, ngroups;
 847     u_int i, j;
 848
 849     /* Minimum len is 8 */
 850     if (len < 8) {
 851         printf(" [invalid len %d]", len);
 852         return;
 853     }
 854
 855     TCHECK(icp->icmp6_data16[1]);
 856     ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
 857     printf(", %d group record(s)", ngroups);
 858     if (vflag > 0) {
 859         /* Print the group records */
 860         group = 8;
 861         for (i = 0; i < ngroups; i++) {
 862             /* type(1) + auxlen(1) + numsrc(2) + grp(16) */
 863             if (len < group + 20) {
 864                 printf(" [invalid number of groups]");
 865                 return;
 866             }
 867             TCHECK2(bp[group + 4], sizeof(struct in6_addr));
 868             printf(" [gaddr %s", ip6addr_string(&bp[group + 4]));
 869             printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]",
 870                                                                 bp[group]));
 871             nsrcs = (bp[group + 2] << 8) + bp[group + 3];
 872             /* Check the number of sources and print them */
 873             if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
 874                 printf(" [invalid number of sources %d]", nsrcs);
 875                 return;
 876             }
 877             if (vflag == 1)
 878                 printf(", %d source(s)", nsrcs);
 879             else {
 880                 /* Print the sources */
 881                 (void)printf(" {");
 882                 for (j = 0; j < nsrcs; j++) {
 883                     TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
 884                             sizeof(struct in6_addr));
 885                     printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)]));
 886                 }
 887                 (void)printf(" }");
 888             }
 889             /* Next group record */
 890             group += 20 + nsrcs * sizeof(struct in6_addr);
 891             printf("]");
 892         }
 893     }
 894     return;
 895 trunc:
 896     (void)printf("[|icmp6]");
 897     return;
 898 }
 899
 900 static void
 901 mldv2_query_print(const u_char *bp, u_int len)
 902 {
 903     struct icmp6_hdr *icp = (struct icmp6_hdr *) bp;
 904     u_int mrc;
 905     int mrt, qqi;
 906     u_int nsrcs;
 907     register u_int i;
 908
 909     /* Minimum len is 28 */
 910     if (len < 28) {
 911         printf(" [invalid len %d]", len);
 912         return;
 913     }
 914     TCHECK(icp->icmp6_data16[0]);
 915     mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
 916     if (mrc < 32768) {
 917         mrt = mrc;
 918     } else {
 919         mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
 920     }
 921     if (vflag) {
 922         (void)printf(" [max resp delay=%d]", mrt);
 923     }
 924     TCHECK2(bp[8], sizeof(struct in6_addr));
 925     printf(" [gaddr %s", ip6addr_string(&bp[8]));
 926
 927     if (vflag) {
 928         TCHECK(bp[25]);
 929         if (bp[24] & 0x08) {
 930                 printf(" sflag");
 931         }
 932         if (bp[24] & 0x07) {
 933                 printf(" robustness=%d", bp[24] & 0x07);
 934         }
 935         if (bp[25] < 128) {
 936                 qqi = bp[25];
 937         } else {
 938                 qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
 939         }
 940         printf(" qqi=%d", qqi);
 941     }
 942
 943     TCHECK2(bp[26], 2);
 944     nsrcs = EXTRACT_16BITS(&bp[26]);
 945     if (nsrcs > 0) {
 946         if (len < 28 + nsrcs * sizeof(struct in6_addr))
 947             printf(" [invalid number of sources]");
 948         else if (vflag > 1) {
 949             printf(" {");
 950             for (i = 0; i < nsrcs; i++) {
 951                 TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
 952                         sizeof(struct in6_addr));
 953                 printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)]));
 954             }
 955             printf(" }");
 956         } else
 957             printf(", %d source(s)", nsrcs);
 958     }
 959     printf("]");
 960     return;
 961 trunc:
 962     (void)printf("[|icmp6]");
 963     return;
 964 }
 965
 966 static void
 967 dnsname_print(const u_char *cp, const u_char *ep)
 968 {
 969         int i;
 970
 971         /* DNS name decoding - no decompression */
 972         printf(", \"");
 973         while (cp < ep) {
 974                 i = *cp++;
 975                 if (i) {
 976                         if (i > ep - cp) {
 977                                 printf("???");
 978                                 break;
 979                         }
 980                         while (i-- && cp < ep) {
 981                                 safeputchar(*cp);
 982                                 cp++;
 983                         }
 984                         if (cp + 1 < ep && *cp)
 985                                 printf(".");
 986                 } else {
 987                         if (cp == ep) {
 988                                 /* FQDN */
 989                                 printf(".");
 990                         } else if (cp + 1 == ep && *cp == '\0') {
 991                                 /* truncated */
 992                         } else {
 993                                 /* invalid */
 994                                 printf("???");
 995                         }
 996                         break;
 997                 }
 998         }
 999         printf("\"");
1000 }
1001
1002 static void
1003 icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep)
1004 {
1005         struct icmp6_nodeinfo *ni6;
1006         struct icmp6_hdr *dp;
1007         const u_char *cp;
1008         size_t siz, i;
1009         int needcomma;
1010
1011         if (ep < bp)
1012                 return;
1013         dp = (struct icmp6_hdr *)bp;
1014         ni6 = (struct icmp6_nodeinfo *)bp;
1015         siz = ep - bp;
1016
1017         switch (ni6->ni_type) {
1018         case ICMP6_NI_QUERY:
1019                 if (siz == sizeof(*dp) + 4) {
1020                         /* KAME who-are-you */
1021                         printf(" who-are-you request");
1022                         break;
1023                 }
1024                 printf(" node information query");
1025
1026                 TCHECK2(*dp, sizeof(*ni6));
1027                 ni6 = (struct icmp6_nodeinfo *)dp;
1028                 printf(" (");   /*)*/
1029                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1030                 case NI_QTYPE_NOOP:
1031                         printf("noop");
1032                         break;
1033                 case NI_QTYPE_SUPTYPES:
1034                         printf("supported qtypes");
1035                         i = EXTRACT_16BITS(&ni6->ni_flags);
1036                         if (i)
1037                                 printf(" [%s]", (i & 0x01) ? "C" : "");
1038                         break;
1039                         break;
1040                 case NI_QTYPE_FQDN:
1041                         printf("DNS name");
1042                         break;
1043                 case NI_QTYPE_NODEADDR:
1044                         printf("node addresses");
1045                         i = ni6->ni_flags;
1046                         if (!i)
1047                                 break;
1048                         /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
1049                         printf(" [%s%s%s%s%s%s]",
1050                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1051                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1052                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1053                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1054                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1055                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
1056                         break;
1057                 default:
1058                         printf("unknown");
1059                         break;
1060                 }
1061
1062                 if (ni6->ni_qtype == NI_QTYPE_NOOP ||
1063                     ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
1064                         if (siz != sizeof(*ni6))
1065                                 if (vflag)
1066                                         printf(", invalid len");
1067                         /*(*/
1068                         printf(")");
1069                         break;
1070                 }
1071
1072
1073                 /* XXX backward compat, icmp-name-lookup-03 */
1074                 if (siz == sizeof(*ni6)) {
1075                         printf(", 03 draft");
1076                         /*(*/
1077                         printf(")");
1078                         break;
1079                 }
1080
1081                 switch (ni6->ni_code) {
1082                 case ICMP6_NI_SUBJ_IPV6:
1083                         if (!TTEST2(*dp,
1084                             sizeof(*ni6) + sizeof(struct in6_addr)))
1085                                 break;
1086                         if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
1087                                 if (vflag)
1088                                         printf(", invalid subject len");
1089                                 break;
1090                         }
1091                         printf(", subject=%s",
1092                             getname6((const u_char *)(ni6 + 1)));
1093                         break;
1094                 case ICMP6_NI_SUBJ_FQDN:
1095                         printf(", subject=DNS name");
1096                         cp = (const u_char *)(ni6 + 1);
1097                         if (cp[0] == ep - cp - 1) {
1098                                 /* icmp-name-lookup-03, pascal string */
1099                                 if (vflag)
1100                                         printf(", 03 draft");
1101                                 cp++;
1102                                 printf(", \"");
1103                                 while (cp < ep) {
1104                                         safeputchar(*cp);
1105                                         cp++;
1106                                 }
1107                                 printf("\"");
1108                         } else
1109                                 dnsname_print(cp, ep);
1110                         break;
1111                 case ICMP6_NI_SUBJ_IPV4:
1112                         if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
1113                                 break;
1114                         if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
1115                                 if (vflag)
1116                                         printf(", invalid subject len");
1117                                 break;
1118                         }
1119                         printf(", subject=%s",
1120                             getname((const u_char *)(ni6 + 1)));
1121                         break;
1122                 default:
1123                         printf(", unknown subject");
1124                         break;
1125                 }
1126
1127                 /*(*/
1128                 printf(")");
1129                 break;
1130
1131         case ICMP6_NI_REPLY:
1132                 if (icmp6len > siz) {
1133                         printf("[|icmp6: node information reply]");
1134                         break;
1135                 }
1136
1137                 needcomma = 0;
1138
1139                 ni6 = (struct icmp6_nodeinfo *)dp;
1140                 printf(" node information reply");
1141                 printf(" (");   /*)*/
1142                 switch (ni6->ni_code) {
1143                 case ICMP6_NI_SUCCESS:
1144                         if (vflag) {
1145                                 printf("success");
1146                                 needcomma++;
1147                         }
1148                         break;
1149                 case ICMP6_NI_REFUSED:
1150                         printf("refused");
1151                         needcomma++;
1152                         if (siz != sizeof(*ni6))
1153                                 if (vflag)
1154                                         printf(", invalid length");
1155                         break;
1156                 case ICMP6_NI_UNKNOWN:
1157                         printf("unknown");
1158                         needcomma++;
1159                         if (siz != sizeof(*ni6))
1160                                 if (vflag)
1161                                         printf(", invalid length");
1162                         break;
1163                 }
1164
1165                 if (ni6->ni_code != ICMP6_NI_SUCCESS) {
1166                         /*(*/
1167                         printf(")");
1168                         break;
1169                 }
1170
1171                 switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
1172                 case NI_QTYPE_NOOP:
1173                         if (needcomma)
1174                                 printf(", ");
1175                         printf("noop");
1176                         if (siz != sizeof(*ni6))
1177                                 if (vflag)
1178                                         printf(", invalid length");
1179                         break;
1180                 case NI_QTYPE_SUPTYPES:
1181                         if (needcomma)
1182                                 printf(", ");
1183                         printf("supported qtypes");
1184                         i = EXTRACT_16BITS(&ni6->ni_flags);
1185                         if (i)
1186                                 printf(" [%s]", (i & 0x01) ? "C" : "");
1187                         break;
1188                 case NI_QTYPE_FQDN:
1189                         if (needcomma)
1190                                 printf(", ");
1191                         printf("DNS name");
1192                         cp = (const u_char *)(ni6 + 1) + 4;
1193                         if (cp[0] == ep - cp - 1) {
1194                                 /* icmp-name-lookup-03, pascal string */
1195                                 if (vflag)
1196                                         printf(", 03 draft");
1197                                 cp++;
1198                                 printf(", \"");
1199                                 while (cp < ep) {
1200                                         safeputchar(*cp);
1201                                         cp++;
1202                                 }
1203                                 printf("\"");
1204                         } else
1205                                 dnsname_print(cp, ep);
1206                         if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
1207                                 printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
1208                         break;
1209                 case NI_QTYPE_NODEADDR:
1210                         if (needcomma)
1211                                 printf(", ");
1212                         printf("node addresses");
1213                         i = sizeof(*ni6);
1214                         while (i < siz) {
1215                                 if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
1216                                         break;
1217                                 printf(" %s", getname6(bp + i));
1218                                 i += sizeof(struct in6_addr);
1219                                 printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i));
1220                                 i += sizeof(int32_t);
1221                         }
1222                         i = ni6->ni_flags;
1223                         if (!i)
1224                                 break;
1225                         printf(" [%s%s%s%s%s%s%s]",
1226                             (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
1227                             (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
1228                             (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
1229                             (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
1230                             (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
1231                             (i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
1232                             (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
1233                         break;
1234                 default:
1235                         if (needcomma)
1236                                 printf(", ");
1237                         printf("unknown");
1238                         break;
1239                 }
1240
1241                 /*(*/
1242                 printf(")");
1243                 break;
1244         }
1245         return;
1246
1247 trunc:
1248         fputs("[|icmp6]", stdout);
1249 }
1250
1251 static void
1252 icmp6_rrenum_print(const u_char *bp, const u_char *ep)
1253 {
1254         struct icmp6_router_renum *rr6;
1255         const char *cp;
1256         struct rr_pco_match *match;
1257         struct rr_pco_use *use;
1258         char hbuf[NI_MAXHOST];
1259         int n;
1260
1261         if (ep < bp)
1262                 return;
1263         rr6 = (struct icmp6_router_renum *)bp;
1264         cp = (const char *)(rr6 + 1);
1265
1266         TCHECK(rr6->rr_reserved);
1267         switch (rr6->rr_code) {
1268         case ICMP6_ROUTER_RENUMBERING_COMMAND:
1269                 printf("router renum: command");
1270                 break;
1271         case ICMP6_ROUTER_RENUMBERING_RESULT:
1272                 printf("router renum: result");
1273                 break;
1274         case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
1275                 printf("router renum: sequence number reset");
1276                 break;
1277         default:
1278                 printf("router renum: code-#%d", rr6->rr_code);
1279                 break;
1280         }
1281
1282         printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum));
1283
1284         if (vflag) {
1285 #define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
1286                 printf("[");    /*]*/
1287                 if (rr6->rr_flags) {
1288                         printf("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
1289                             F(ICMP6_RR_FLAGS_REQRESULT, "R"),
1290                             F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
1291                             F(ICMP6_RR_FLAGS_SPECSITE, "S"),
1292                             F(ICMP6_RR_FLAGS_PREVDONE, "P"));
1293                 }
1294                 printf("seg=%u,", rr6->rr_segnum);
1295                 printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay));
1296                 if (rr6->rr_reserved)
1297                         printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved));
1298                 /*[*/
1299                 printf("]");
1300 #undef F
1301         }
1302
1303         if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
1304                 match = (struct rr_pco_match *)cp;
1305                 cp = (const char *)(match + 1);
1306
1307                 TCHECK(match->rpm_prefix);
1308
1309                 if (vflag > 1)
1310                         printf("\n\t");
1311                 else
1312                         printf(" ");
1313                 printf("match(");       /*)*/
1314                 switch (match->rpm_code) {
1315                 case RPM_PCO_ADD:       printf("add"); break;
1316                 case RPM_PCO_CHANGE:    printf("change"); break;
1317                 case RPM_PCO_SETGLOBAL: printf("setglobal"); break;
1318                 default:                printf("#%u", match->rpm_code); break;
1319                 }
1320
1321                 if (vflag) {
1322                         printf(",ord=%u", match->rpm_ordinal);
1323                         printf(",min=%u", match->rpm_minlen);
1324                         printf(",max=%u", match->rpm_maxlen);
1325                 }
1326                 if (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf)))
1327                         printf(",%s/%u", hbuf, match->rpm_matchlen);
1328                 else
1329                         printf(",?/%u", match->rpm_matchlen);
1330                 /*(*/
1331                 printf(")");
1332
1333                 n = match->rpm_len - 3;
1334                 if (n % 4)
1335                         goto trunc;
1336                 n /= 4;
1337                 while (n-- > 0) {
1338                         use = (struct rr_pco_use *)cp;
1339                         cp = (const char *)(use + 1);
1340
1341                         TCHECK(use->rpu_prefix);
1342
1343                         if (vflag > 1)
1344                                 printf("\n\t");
1345                         else
1346                                 printf(" ");
1347                         printf("use("); /*)*/
1348                         if (use->rpu_flags) {
1349 #define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
1350                                 printf("%s%s,",
1351                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
1352                                     F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
1353 #undef F
1354                         }
1355                         if (vflag) {
1356                                 printf("mask=0x%x,", use->rpu_ramask);
1357                                 printf("raflags=0x%x,", use->rpu_raflags);
1358                                 if (~use->rpu_vltime == 0)
1359                                         printf("vltime=infty,");
1360                                 else
1361                                         printf("vltime=%u,",
1362                                             EXTRACT_32BITS(&use->rpu_vltime));
1363                                 if (~use->rpu_pltime == 0)
1364                                         printf("pltime=infty,");
1365                                 else
1366                                         printf("pltime=%u,",
1367                                             EXTRACT_32BITS(&use->rpu_pltime));
1368                         }
1369                         if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf,
1370                             sizeof(hbuf)))
1371                                 printf("%s/%u/%u", hbuf, use->rpu_uselen,
1372                                     use->rpu_keeplen);
1373                         else
1374                                 printf("?/%u/%u", use->rpu_uselen,
1375                                     use->rpu_keeplen);
1376                         /*(*/
1377                         printf(")");
1378                 }
1379         }
1380
1381         return;
1382
1383 trunc:
1384         fputs("[|icmp6]", stdout);
1385 }
1386
1387 #endif /* INET6 */