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