The Tcpdump Group git mirrors - tcpdump/blob - print-ip.c

   1 /*
   2  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
   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 /* \summary: IP printer */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include <netdissect-stdinc.h>
  29
  30 #include <string.h>
  31
  32 #include "netdissect.h"
  33 #include "addrtoname.h"
  34 #include "extract.h"
  35
  36 #include "ip.h"
  37 #include "ipproto.h"
  38
  39 static const char tstr[] = "[|ip]";
  40
  41 static const struct tok ip_option_values[] = {
  42     { IPOPT_EOL, "EOL" },
  43     { IPOPT_NOP, "NOP" },
  44     { IPOPT_TS, "timestamp" },
  45     { IPOPT_SECURITY, "security" },
  46     { IPOPT_RR, "RR" },
  47     { IPOPT_SSRR, "SSRR" },
  48     { IPOPT_LSRR, "LSRR" },
  49     { IPOPT_RA, "RA" },
  50     { IPOPT_RFC1393, "traceroute" },
  51     { 0, NULL }
  52 };
  53
  54 /*
  55  * print the recorded route in an IP RR, LSRR or SSRR option.
  56  */
  57 static int
  58 ip_printroute(netdissect_options *ndo,
  59               register const u_char *cp, u_int length)
  60 {
  61         register u_int ptr;
  62         register u_int len;
  63
  64         if (length < 3) {
  65                 ND_PRINT((ndo, " [bad length %u]", length));
  66                 return (0);
  67         }
  68         if ((length + 1) & 3)
  69                 ND_PRINT((ndo, " [bad length %u]", length));
  70         ND_TCHECK(cp[2]);
  71         ptr = cp[2] - 1;
  72         if (ptr < 3 || ((ptr + 1) & 3) || ptr > length + 1)
  73                 ND_PRINT((ndo, " [bad ptr %u]", cp[2]));
  74
  75         for (len = 3; len < length; len += 4) {
  76                 ND_TCHECK2(cp[len], 4);
  77                 ND_PRINT((ndo, " %s", ipaddr_string(ndo, &cp[len])));
  78                 if (ptr > len)
  79                         ND_PRINT((ndo, ","));
  80         }
  81         return (0);
  82
  83 trunc:
  84         return (-1);
  85 }
  86
  87 /*
  88  * If source-routing is present and valid, return the final destination.
  89  * Otherwise, return IP destination.
  90  *
  91  * This is used for UDP and TCP pseudo-header in the checksum
  92  * calculation.
  93  */
  94 static uint32_t
  95 ip_finddst(netdissect_options *ndo,
  96            const struct ip *ip)
  97 {
  98         int length;
  99         int len;
 100         const u_char *cp;
 101         uint32_t retval;
 102
 103         cp = (const u_char *)(ip + 1);
 104         length = (IP_HL(ip) << 2) - sizeof(struct ip);
 105
 106         for (; length > 0; cp += len, length -= len) {
 107                 int tt;
 108
 109                 ND_TCHECK(*cp);
 110                 tt = *cp;
 111                 if (tt == IPOPT_EOL)
 112                         break;
 113                 else if (tt == IPOPT_NOP)
 114                         len = 1;
 115                 else {
 116                         ND_TCHECK(cp[1]);
 117                         len = cp[1];
 118                         if (len < 2)
 119                                 break;
 120                 }
 121                 ND_TCHECK2(*cp, len);
 122                 switch (tt) {
 123
 124                 case IPOPT_SSRR:
 125                 case IPOPT_LSRR:
 126                         if (len < 7)
 127                                 break;
 128                         UNALIGNED_MEMCPY(&retval, cp + len - 4, 4);
 129                         return retval;
 130                 }
 131         }
 132 trunc:
 133         UNALIGNED_MEMCPY(&retval, &ip->ip_dst, sizeof(uint32_t));
 134         return retval;
 135 }
 136
 137 /*
 138  * Compute a V4-style checksum by building a pseudoheader.
 139  */
 140 int
 141 nextproto4_cksum(netdissect_options *ndo,
 142                  const struct ip *ip, const uint8_t *data,
 143                  u_int len, u_int covlen, u_int next_proto)
 144 {
 145         struct phdr {
 146                 uint32_t src;
 147                 uint32_t dst;
 148                 u_char mbz;
 149                 u_char proto;
 150                 uint16_t len;
 151         } ph;
 152         struct cksum_vec vec[2];
 153
 154         /* pseudo-header.. */
 155         ph.len = htons((uint16_t)len);
 156         ph.mbz = 0;
 157         ph.proto = next_proto;
 158         UNALIGNED_MEMCPY(&ph.src, &ip->ip_src, sizeof(uint32_t));
 159         if (IP_HL(ip) == 5)
 160                 UNALIGNED_MEMCPY(&ph.dst, &ip->ip_dst, sizeof(uint32_t));
 161         else
 162                 ph.dst = ip_finddst(ndo, ip);
 163
 164         vec[0].ptr = (const uint8_t *)(void *)&ph;
 165         vec[0].len = sizeof(ph);
 166         vec[1].ptr = data;
 167         vec[1].len = covlen;
 168         return (in_cksum(vec, 2));
 169 }
 170
 171 static void
 172 ip_printts(netdissect_options *ndo,
 173            register const u_char *cp, u_int length)
 174 {
 175         register u_int ptr;
 176         register u_int len;
 177         int hoplen;
 178         const char *type;
 179
 180         if (length < 4) {
 181                 ND_PRINT((ndo, "[bad length %u]", length));
 182                 return;
 183         }
 184         ND_PRINT((ndo, " TS{"));
 185         hoplen = ((cp[3]&0xF) != IPOPT_TS_TSONLY) ? 8 : 4;
 186         if ((length - 4) & (hoplen-1))
 187                 ND_PRINT((ndo, "[bad length %u]", length));
 188         ptr = cp[2] - 1;
 189         len = 0;
 190         if (ptr < 4 || ((ptr - 4) & (hoplen-1)) || ptr > length + 1)
 191                 ND_PRINT((ndo, "[bad ptr %u]", cp[2]));
 192         switch (cp[3]&0xF) {
 193         case IPOPT_TS_TSONLY:
 194                 ND_PRINT((ndo, "TSONLY"));
 195                 break;
 196         case IPOPT_TS_TSANDADDR:
 197                 ND_PRINT((ndo, "TS+ADDR"));
 198                 break;
 199         /*
 200          * prespecified should really be 3, but some ones might send 2
 201          * instead, and the IPOPT_TS_PRESPEC constant can apparently
 202          * have both values, so we have to hard-code it here.
 203          */
 204
 205         case 2:
 206                 ND_PRINT((ndo, "PRESPEC2.0"));
 207                 break;
 208         case 3:                 /* IPOPT_TS_PRESPEC */
 209                 ND_PRINT((ndo, "PRESPEC"));
 210                 break;
 211         default:
 212                 ND_PRINT((ndo, "[bad ts type %d]", cp[3]&0xF));
 213                 goto done;
 214         }
 215
 216         type = " ";
 217         for (len = 4; len < length; len += hoplen) {
 218                 if (ptr == len)
 219                         type = " ^ ";
 220                 ND_PRINT((ndo, "%s%d@%s", type, EXTRACT_32BITS(&cp[len+hoplen-4]),
 221                        hoplen!=8 ? "" : ipaddr_string(ndo, &cp[len])));
 222                 type = " ";
 223         }
 224
 225 done:
 226         ND_PRINT((ndo, "%s", ptr == len ? " ^ " : ""));
 227
 228         if (cp[3]>>4)
 229                 ND_PRINT((ndo, " [%d hops not recorded]} ", cp[3]>>4));
 230         else
 231                 ND_PRINT((ndo, "}"));
 232 }
 233
 234 /*
 235  * print IP options.
 236  */
 237 static void
 238 ip_optprint(netdissect_options *ndo,
 239             register const u_char *cp, u_int length)
 240 {
 241         register u_int option_len;
 242         const char *sep = "";
 243
 244         for (; length > 0; cp += option_len, length -= option_len) {
 245                 u_int option_code;
 246
 247                 ND_PRINT((ndo, "%s", sep));
 248                 sep = ",";
 249
 250                 ND_TCHECK(*cp);
 251                 option_code = *cp;
 252
 253                 ND_PRINT((ndo, "%s",
 254                           tok2str(ip_option_values,"unknown %u",option_code)));
 255
 256                 if (option_code == IPOPT_NOP ||
 257                     option_code == IPOPT_EOL)
 258                         option_len = 1;
 259
 260                 else {
 261                         ND_TCHECK(cp[1]);
 262                         option_len = cp[1];
 263                         if (option_len < 2) {
 264                                 ND_PRINT((ndo, " [bad length %u]", option_len));
 265                                 return;
 266                         }
 267                 }
 268
 269                 if (option_len > length) {
 270                         ND_PRINT((ndo, " [bad length %u]", option_len));
 271                         return;
 272                 }
 273
 274                 ND_TCHECK2(*cp, option_len);
 275
 276                 switch (option_code) {
 277                 case IPOPT_EOL:
 278                         return;
 279
 280                 case IPOPT_TS:
 281                         ip_printts(ndo, cp, option_len);
 282                         break;
 283
 284                 case IPOPT_RR:       /* fall through */
 285                 case IPOPT_SSRR:
 286                 case IPOPT_LSRR:
 287                         if (ip_printroute(ndo, cp, option_len) == -1)
 288                                 goto trunc;
 289                         break;
 290
 291                 case IPOPT_RA:
 292                         if (option_len < 4) {
 293                                 ND_PRINT((ndo, " [bad length %u]", option_len));
 294                                 break;
 295                         }
 296                         ND_TCHECK(cp[3]);
 297                         if (EXTRACT_16BITS(&cp[2]) != 0)
 298                                 ND_PRINT((ndo, " value %u", EXTRACT_16BITS(&cp[2])));
 299                         break;
 300
 301                 case IPOPT_NOP:       /* nothing to print - fall through */
 302                 case IPOPT_SECURITY:
 303                 default:
 304                         break;
 305                 }
 306         }
 307         return;
 308
 309 trunc:
 310         ND_PRINT((ndo, "%s", tstr));
 311 }
 312
 313 #define IP_RES 0x8000
 314
 315 static const struct tok ip_frag_values[] = {
 316         { IP_MF,        "+" },
 317         { IP_DF,        "DF" },
 318         { IP_RES,       "rsvd" }, /* The RFC3514 evil ;-) bit */
 319         { 0,            NULL }
 320 };
 321
 322 struct ip_print_demux_state {
 323         const struct ip *ip;
 324         const u_char *cp;
 325         u_int   len, off;
 326         u_char  nh;
 327         int     advance;
 328 };
 329
 330 static void
 331 ip_print_demux(netdissect_options *ndo,
 332                struct ip_print_demux_state *ipds)
 333 {
 334         const char *p_name;
 335
 336 again:
 337         switch (ipds->nh) {
 338
 339         case IPPROTO_AH:
 340                 if (!ND_TTEST(*ipds->cp)) {
 341                         ND_PRINT((ndo, "[|AH]"));
 342                         break;
 343                 }
 344                 ipds->nh = *ipds->cp;
 345                 ipds->advance = ah_print(ndo, ipds->cp);
 346                 if (ipds->advance <= 0)
 347                         break;
 348                 ipds->cp += ipds->advance;
 349                 ipds->len -= ipds->advance;
 350                 goto again;
 351
 352         case IPPROTO_ESP:
 353         {
 354                 int enh, padlen;
 355                 ipds->advance = esp_print(ndo, ipds->cp, ipds->len,
 356                                     (const u_char *)ipds->ip,
 357                                     &enh, &padlen);
 358                 if (ipds->advance <= 0)
 359                         break;
 360                 ipds->cp += ipds->advance;
 361                 ipds->len -= ipds->advance + padlen;
 362                 ipds->nh = enh & 0xff;
 363                 goto again;
 364         }
 365
 366         case IPPROTO_IPCOMP:
 367         {
 368                 ipcomp_print(ndo, ipds->cp);
 369                 /*
 370                  * Either this has decompressed the payload and
 371                  * printed it, in which case there's nothing more
 372                  * to do, or it hasn't, in which case there's
 373                  * nothing more to do.
 374                  */
 375                 break;
 376         }
 377
 378         case IPPROTO_SCTP:
 379                 sctp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
 380                 break;
 381
 382         case IPPROTO_DCCP:
 383                 dccp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
 384                 break;
 385
 386         case IPPROTO_TCP:
 387                 /* pass on the MF bit plus the offset to detect fragments */
 388                 tcp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
 389                           ipds->off & (IP_MF|IP_OFFMASK));
 390                 break;
 391
 392         case IPPROTO_UDP:
 393                 /* pass on the MF bit plus the offset to detect fragments */
 394                 udp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
 395                           ipds->off & (IP_MF|IP_OFFMASK));
 396                 break;
 397
 398         case IPPROTO_ICMP:
 399                 /* pass on the MF bit plus the offset to detect fragments */
 400                 icmp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
 401                            ipds->off & (IP_MF|IP_OFFMASK));
 402                 break;
 403
 404         case IPPROTO_PIGP:
 405                 /*
 406                  * XXX - the current IANA protocol number assignments
 407                  * page lists 9 as "any private interior gateway
 408                  * (used by Cisco for their IGRP)" and 88 as
 409                  * "EIGRP" from Cisco.
 410                  *
 411                  * Recent BSD <netinet/in.h> headers define
 412                  * IP_PROTO_PIGP as 9 and IP_PROTO_IGRP as 88.
 413                  * We define IP_PROTO_PIGP as 9 and
 414                  * IP_PROTO_EIGRP as 88; those names better
 415                  * match was the current protocol number
 416                  * assignments say.
 417                  */
 418                 igrp_print(ndo, ipds->cp, ipds->len);
 419                 break;
 420
 421         case IPPROTO_EIGRP:
 422                 eigrp_print(ndo, ipds->cp, ipds->len);
 423                 break;
 424
 425         case IPPROTO_ND:
 426                 ND_PRINT((ndo, " nd %d", ipds->len));
 427                 break;
 428
 429         case IPPROTO_EGP:
 430                 egp_print(ndo, ipds->cp, ipds->len);
 431                 break;
 432
 433         case IPPROTO_OSPF:
 434                 ospf_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
 435                 break;
 436
 437         case IPPROTO_IGMP:
 438                 igmp_print(ndo, ipds->cp, ipds->len);
 439                 break;
 440
 441         case IPPROTO_IPV4:
 442                 /* DVMRP multicast tunnel (ip-in-ip encapsulation) */
 443                 ip_print(ndo, ipds->cp, ipds->len);
 444                 if (! ndo->ndo_vflag) {
 445                         ND_PRINT((ndo, " (ipip-proto-4)"));
 446                         return;
 447                 }
 448                 break;
 449
 450         case IPPROTO_IPV6:
 451                 /* ip6-in-ip encapsulation */
 452                 ip6_print(ndo, ipds->cp, ipds->len);
 453                 break;
 454
 455         case IPPROTO_RSVP:
 456                 rsvp_print(ndo, ipds->cp, ipds->len);
 457                 break;
 458
 459         case IPPROTO_GRE:
 460                 /* do it */
 461                 gre_print(ndo, ipds->cp, ipds->len);
 462                 break;
 463
 464         case IPPROTO_MOBILE:
 465                 mobile_print(ndo, ipds->cp, ipds->len);
 466                 break;
 467
 468         case IPPROTO_PIM:
 469                 pim_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
 470                 break;
 471
 472         case IPPROTO_VRRP:
 473                 if (ndo->ndo_packettype == PT_CARP) {
 474                         if (ndo->ndo_vflag)
 475                                 ND_PRINT((ndo, "carp %s > %s: ",
 476                                              ipaddr_string(ndo, &ipds->ip->ip_src),
 477                                              ipaddr_string(ndo, &ipds->ip->ip_dst)));
 478                         carp_print(ndo, ipds->cp, ipds->len, ipds->ip->ip_ttl);
 479                 } else {
 480                         if (ndo->ndo_vflag)
 481                                 ND_PRINT((ndo, "vrrp %s > %s: ",
 482                                              ipaddr_string(ndo, &ipds->ip->ip_src),
 483                                              ipaddr_string(ndo, &ipds->ip->ip_dst)));
 484                         vrrp_print(ndo, ipds->cp, ipds->len,
 485                                 (const u_char *)ipds->ip, ipds->ip->ip_ttl);
 486                 }
 487                 break;
 488
 489         case IPPROTO_PGM:
 490                 pgm_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
 491                 break;
 492
 493         default:
 494                 if (ndo->ndo_nflag==0 && (p_name = netdb_protoname(ipds->nh)) != NULL)
 495                         ND_PRINT((ndo, " %s", p_name));
 496                 else
 497                         ND_PRINT((ndo, " ip-proto-%d", ipds->nh));
 498                 ND_PRINT((ndo, " %d", ipds->len));
 499                 break;
 500         }
 501 }
 502
 503 void
 504 ip_print_inner(netdissect_options *ndo,
 505                const u_char *bp,
 506                u_int length, u_int nh,
 507                const u_char *bp2)
 508 {
 509         struct ip_print_demux_state  ipd;
 510
 511         ipd.ip = (const struct ip *)bp2;
 512         ipd.cp = bp;
 513         ipd.len  = length;
 514         ipd.off  = 0;
 515         ipd.nh   = nh;
 516         ipd.advance = 0;
 517
 518         ip_print_demux(ndo, &ipd);
 519 }
 520
 521
 522 /*
 523  * print an IP datagram.
 524  */
 525 void
 526 ip_print(netdissect_options *ndo,
 527          const u_char *bp,
 528          u_int length)
 529 {
 530         struct ip_print_demux_state  ipd;
 531         struct ip_print_demux_state *ipds=&ipd;
 532         const u_char *ipend;
 533         u_int hlen;
 534         struct cksum_vec vec[1];
 535         uint16_t sum, ip_sum;
 536         const char *p_name;
 537
 538         ipds->ip = (const struct ip *)bp;
 539         ND_TCHECK(ipds->ip->ip_vhl);
 540         if (IP_V(ipds->ip) != 4) { /* print version and fail if != 4 */
 541             if (IP_V(ipds->ip) == 6)
 542               ND_PRINT((ndo, "IP6, wrong link-layer encapsulation "));
 543             else
 544               ND_PRINT((ndo, "IP%u ", IP_V(ipds->ip)));
 545             return;
 546         }
 547         if (!ndo->ndo_eflag)
 548                 ND_PRINT((ndo, "IP "));
 549
 550         ND_TCHECK(*ipds->ip);
 551         if (length < sizeof (struct ip)) {
 552                 ND_PRINT((ndo, "truncated-ip %u", length));
 553                 return;
 554         }
 555         hlen = IP_HL(ipds->ip) * 4;
 556         if (hlen < sizeof (struct ip)) {
 557                 ND_PRINT((ndo, "bad-hlen %u", hlen));
 558                 return;
 559         }
 560
 561         ipds->len = EXTRACT_16BITS(&ipds->ip->ip_len);
 562         if (length < ipds->len)
 563                 ND_PRINT((ndo, "truncated-ip - %u bytes missing! ",
 564                         ipds->len - length));
 565         if (ipds->len < hlen) {
 566 #ifdef GUESS_TSO
 567             if (ipds->len) {
 568                 ND_PRINT((ndo, "bad-len %u", ipds->len));
 569                 return;
 570             }
 571             else {
 572                 /* we guess that it is a TSO send */
 573                 ipds->len = length;
 574             }
 575 #else
 576             ND_PRINT((ndo, "bad-len %u", ipds->len));
 577             return;
 578 #endif /* GUESS_TSO */
 579         }
 580
 581         /*
 582          * Cut off the snapshot length to the end of the IP payload.
 583          */
 584         ipend = bp + ipds->len;
 585         if (ipend < ndo->ndo_snapend)
 586                 ndo->ndo_snapend = ipend;
 587
 588         ipds->len -= hlen;
 589
 590         ipds->off = EXTRACT_16BITS(&ipds->ip->ip_off);
 591
 592         if (ndo->ndo_vflag) {
 593             ND_PRINT((ndo, "(tos 0x%x", (int)ipds->ip->ip_tos));
 594             /* ECN bits */
 595             switch (ipds->ip->ip_tos & 0x03) {
 596
 597             case 0:
 598                 break;
 599
 600             case 1:
 601                 ND_PRINT((ndo, ",ECT(1)"));
 602                 break;
 603
 604             case 2:
 605                 ND_PRINT((ndo, ",ECT(0)"));
 606                 break;
 607
 608             case 3:
 609                 ND_PRINT((ndo, ",CE"));
 610                 break;
 611             }
 612
 613             if (ipds->ip->ip_ttl >= 1)
 614                 ND_PRINT((ndo, ", ttl %u", ipds->ip->ip_ttl));
 615
 616             /*
 617              * for the firewall guys, print id, offset.
 618              * On all but the last stick a "+" in the flags portion.
 619              * For unfragmented datagrams, note the don't fragment flag.
 620              */
 621
 622             ND_PRINT((ndo, ", id %u, offset %u, flags [%s], proto %s (%u)",
 623                          EXTRACT_16BITS(&ipds->ip->ip_id),
 624                          (ipds->off & 0x1fff) * 8,
 625                          bittok2str(ip_frag_values, "none", ipds->off&0xe000),
 626                          tok2str(ipproto_values,"unknown",ipds->ip->ip_p),
 627                          ipds->ip->ip_p));
 628
 629             ND_PRINT((ndo, ", length %u", EXTRACT_16BITS(&ipds->ip->ip_len)));
 630
 631             if ((hlen - sizeof(struct ip)) > 0) {
 632                 ND_PRINT((ndo, ", options ("));
 633                 ip_optprint(ndo, (const u_char *)(ipds->ip + 1), hlen - sizeof(struct ip));
 634                 ND_PRINT((ndo, ")"));
 635             }
 636
 637             if (!ndo->ndo_Kflag && (const u_char *)ipds->ip + hlen <= ndo->ndo_snapend) {
 638                 vec[0].ptr = (const uint8_t *)(const void *)ipds->ip;
 639                 vec[0].len = hlen;
 640                 sum = in_cksum(vec, 1);
 641                 if (sum != 0) {
 642                     ip_sum = EXTRACT_16BITS(&ipds->ip->ip_sum);
 643                     ND_PRINT((ndo, ", bad cksum %x (->%x)!", ip_sum,
 644                              in_cksum_shouldbe(ip_sum, sum)));
 645                 }
 646             }
 647
 648                 ND_PRINT((ndo, ")\n    "));
 649         }
 650
 651         /*
 652          * If this is fragment zero, hand it to the next higher
 653          * level protocol.
 654          */
 655         if ((ipds->off & 0x1fff) == 0) {
 656                 ipds->cp = (const u_char *)ipds->ip + hlen;
 657                 ipds->nh = ipds->ip->ip_p;
 658
 659                 if (ipds->nh != IPPROTO_TCP && ipds->nh != IPPROTO_UDP &&
 660                     ipds->nh != IPPROTO_SCTP && ipds->nh != IPPROTO_DCCP) {
 661                         ND_PRINT((ndo, "%s > %s: ",
 662                                      ipaddr_string(ndo, &ipds->ip->ip_src),
 663                                      ipaddr_string(ndo, &ipds->ip->ip_dst)));
 664                 }
 665                 ip_print_demux(ndo, ipds);
 666         } else {
 667                 /*
 668                  * Ultra quiet now means that all this stuff should be
 669                  * suppressed.
 670                  */
 671                 if (ndo->ndo_qflag > 1)
 672                         return;
 673
 674                 /*
 675                  * This isn't the first frag, so we're missing the
 676                  * next level protocol header.  print the ip addr
 677                  * and the protocol.
 678                  */
 679                 ND_PRINT((ndo, "%s > %s:", ipaddr_string(ndo, &ipds->ip->ip_src),
 680                           ipaddr_string(ndo, &ipds->ip->ip_dst)));
 681                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(ipds->ip->ip_p)) != NULL)
 682                         ND_PRINT((ndo, " %s", p_name));
 683                 else
 684                         ND_PRINT((ndo, " ip-proto-%d", ipds->ip->ip_p));
 685         }
 686         return;
 687
 688 trunc:
 689         ND_PRINT((ndo, "%s", tstr));
 690         return;
 691 }
 692
 693 void
 694 ipN_print(netdissect_options *ndo, register const u_char *bp, register u_int length)
 695 {
 696         if (length < 1) {
 697                 ND_PRINT((ndo, "truncated-ip %d", length));
 698                 return;
 699         }
 700
 701         ND_TCHECK(*bp);
 702         switch (*bp & 0xF0) {
 703         case 0x40:
 704                 ip_print (ndo, bp, length);
 705                 break;
 706         case 0x60:
 707                 ip6_print (ndo, bp, length);
 708                 break;
 709         default:
 710                 ND_PRINT((ndo, "unknown ip %d", (*bp & 0xF0) >> 4));
 711                 break;
 712         }
 713         return;
 714
 715 trunc:
 716         ND_PRINT((ndo, "%s", tstr));
 717         return;
 718 }
 719
 720 /*
 721  * Local Variables:
 722  * c-style: whitesmith
 723  * c-basic-offset: 8
 724  * End:
 725  */
 726
 727