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

   1 /*
   2  * Copyright (c) 1990, 1991, 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  * Format and print bootp packets.
  22  */
  23 #ifndef lint
  24 static const char rcsid[] =
  25     "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.66 2002-09-05 21:25:38 guy Exp $ (LBL)";
  26 #endif
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <tcpdump-stdinc.h>
  33
  34 #include <stdio.h>
  35 #include <string.h>
  36
  37 #include "interface.h"
  38 #include "addrtoname.h"
  39 #include "extract.h"
  40 #include "ether.h"
  41 #include "bootp.h"
  42
  43 static void rfc1048_print(const u_char *);
  44 static void cmu_print(const u_char *);
  45
  46 static char tstr[] = " [|bootp]";
  47
  48 /*
  49  * Print bootp requests
  50  */
  51 void
  52 bootp_print(register const u_char *cp, u_short sport, u_short dport)
  53 {
  54         register const struct bootp *bp;
  55         static const u_char vm_cmu[4] = VM_CMU;
  56         static const u_char vm_rfc1048[4] = VM_RFC1048;
  57
  58         bp = (const struct bootp *)cp;
  59         TCHECK(bp->bp_op);
  60         switch (bp->bp_op) {
  61
  62         case BOOTREQUEST:
  63                 /* Usually, a request goes from a client to a server */
  64                 if (sport != IPPORT_BOOTPC || dport != IPPORT_BOOTPS)
  65                         printf(" (request)");
  66                 break;
  67
  68         case BOOTREPLY:
  69                 /* Usually, a reply goes from a server to a client */
  70                 if (sport != IPPORT_BOOTPS || dport != IPPORT_BOOTPC)
  71                         printf(" (reply)");
  72                 break;
  73
  74         default:
  75                 printf(" bootp-#%d", bp->bp_op);
  76         }
  77
  78         TCHECK(bp->bp_secs);
  79
  80         /* The usual hardware address type is 1 (10Mb Ethernet) */
  81         if (bp->bp_htype != 1)
  82                 printf(" htype-#%d", bp->bp_htype);
  83
  84         /* The usual length for 10Mb Ethernet address is 6 bytes */
  85         if (bp->bp_htype != 1 || bp->bp_hlen != 6)
  86                 printf(" hlen:%d", bp->bp_hlen);
  87
  88         /* Only print interesting fields */
  89         if (bp->bp_hops)
  90                 printf(" hops:%d", bp->bp_hops);
  91         if (bp->bp_xid)
  92                 printf(" xid:0x%x", (u_int32_t)ntohl(bp->bp_xid));
  93         if (bp->bp_secs)
  94                 printf(" secs:%d", ntohs(bp->bp_secs));
  95         if (bp->bp_flags)
  96                 printf(" flags:0x%x", ntohs(bp->bp_flags));
  97
  98         /* Client's ip address */
  99         TCHECK(bp->bp_ciaddr);
 100         if (bp->bp_ciaddr.s_addr)
 101                 printf(" C:%s", ipaddr_string(&bp->bp_ciaddr));
 102
 103         /* 'your' ip address (bootp client) */
 104         TCHECK(bp->bp_yiaddr);
 105         if (bp->bp_yiaddr.s_addr)
 106                 printf(" Y:%s", ipaddr_string(&bp->bp_yiaddr));
 107
 108         /* Server's ip address */
 109         TCHECK(bp->bp_siaddr);
 110         if (bp->bp_siaddr.s_addr)
 111                 printf(" S:%s", ipaddr_string(&bp->bp_siaddr));
 112
 113         /* Gateway's ip address */
 114         TCHECK(bp->bp_giaddr);
 115         if (bp->bp_giaddr.s_addr)
 116                 printf(" G:%s", ipaddr_string(&bp->bp_giaddr));
 117
 118         /* Client's Ethernet address */
 119         if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
 120                 register const struct ether_header *eh;
 121                 register const char *e;
 122
 123                 TCHECK2(bp->bp_chaddr[0], 6);
 124                 eh = (const struct ether_header *)packetp;
 125                 if (bp->bp_op == BOOTREQUEST)
 126                         e = (const char *)ESRC(eh);
 127                 else if (bp->bp_op == BOOTREPLY)
 128                         e = (const char *)EDST(eh);
 129                 else
 130                         e = 0;
 131                 if (e == 0 || memcmp((const char *)bp->bp_chaddr, e, 6) != 0)
 132                         printf(" ether %s", etheraddr_string(bp->bp_chaddr));
 133         }
 134
 135         TCHECK2(bp->bp_sname[0], 1);            /* check first char only */
 136         if (*bp->bp_sname) {
 137                 printf(" sname \"");
 138                 if (fn_print(bp->bp_sname, snapend)) {
 139                         putchar('"');
 140                         fputs(tstr + 1, stdout);
 141                         return;
 142                 }
 143                 putchar('"');
 144         }
 145         TCHECK2(bp->bp_sname[0], 1);            /* check first char only */
 146         if (*bp->bp_file) {
 147                 printf(" file \"");
 148                 if (fn_print(bp->bp_file, snapend)) {
 149                         putchar('"');
 150                         fputs(tstr + 1, stdout);
 151                         return;
 152                 }
 153                 putchar('"');
 154         }
 155
 156         /* Decode the vendor buffer */
 157         TCHECK(bp->bp_vend[0]);
 158         if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
 159                  sizeof(u_int32_t)) == 0)
 160                 rfc1048_print(bp->bp_vend);
 161         else if (memcmp((const char *)bp->bp_vend, vm_cmu,
 162                       sizeof(u_int32_t)) == 0)
 163                 cmu_print(bp->bp_vend);
 164         else {
 165                 u_int32_t ul;
 166
 167                 ul = EXTRACT_32BITS(&bp->bp_vend);
 168                 if (ul != 0)
 169                         printf("vend-#0x%x", ul);
 170         }
 171
 172         return;
 173 trunc:
 174         fputs(tstr, stdout);
 175 }
 176
 177 /*
 178  * The first character specifies the format to print:
 179  *     i - ip address (32 bits)
 180  *     p - ip address pairs (32 bits + 32 bits)
 181  *     l - long (32 bits)
 182  *     L - unsigned long (32 bits)
 183  *     s - short (16 bits)
 184  *     b - period-seperated decimal bytes (variable length)
 185  *     x - colon-seperated hex bytes (variable length)
 186  *     a - ascii string (variable length)
 187  *     B - on/off (8 bits)
 188  *     $ - special (explicit code to handle)
 189  */
 190 static struct tok tag2str[] = {
 191 /* RFC1048 tags */
 192         { TAG_PAD,              " PAD" },
 193         { TAG_SUBNET_MASK,      "iSM" },        /* subnet mask (RFC950) */
 194         { TAG_TIME_OFFSET,      "LTZ" },        /* seconds from UTC */
 195         { TAG_GATEWAY,          "iDG" },        /* default gateway */
 196         { TAG_TIME_SERVER,      "iTS" },        /* time servers (RFC868) */
 197         { TAG_NAME_SERVER,      "iIEN" },       /* IEN name servers (IEN116) */
 198         { TAG_DOMAIN_SERVER,    "iNS" },        /* domain name (RFC1035) */
 199         { TAG_LOG_SERVER,       "iLOG" },       /* MIT log servers */
 200         { TAG_COOKIE_SERVER,    "iCS" },        /* cookie servers (RFC865) */
 201         { TAG_LPR_SERVER,       "iLPR" },       /* lpr server (RFC1179) */
 202         { TAG_IMPRESS_SERVER,   "iIM" },        /* impress servers (Imagen) */
 203         { TAG_RLP_SERVER,       "iRL" },        /* resource location (RFC887) */
 204         { TAG_HOSTNAME,         "aHN" },        /* ascii hostname */
 205         { TAG_BOOTSIZE,         "sBS" },        /* 512 byte blocks */
 206         { TAG_END,              " END" },
 207 /* RFC1497 tags */
 208         { TAG_DUMPPATH,         "aDP" },
 209         { TAG_DOMAINNAME,       "aDN" },
 210         { TAG_SWAP_SERVER,      "iSS" },
 211         { TAG_ROOTPATH,         "aRP" },
 212         { TAG_EXTPATH,          "aEP" },
 213 /* RFC2132 tags */
 214         { TAG_IP_FORWARD,       "BIPF" },
 215         { TAG_NL_SRCRT,         "BSRT" },
 216         { TAG_PFILTERS,         "pPF" },
 217         { TAG_REASS_SIZE,       "sRSZ" },
 218         { TAG_DEF_TTL,          "bTTL" },
 219         { TAG_MTU_TIMEOUT,      "lMA" },
 220         { TAG_MTU_TABLE,        "sMT" },
 221         { TAG_INT_MTU,          "sMTU" },
 222         { TAG_LOCAL_SUBNETS,    "BLSN" },
 223         { TAG_BROAD_ADDR,       "iBR" },
 224         { TAG_DO_MASK_DISC,     "BMD" },
 225         { TAG_SUPPLY_MASK,      "BMS" },
 226         { TAG_DO_RDISC,         "BRD" },
 227         { TAG_RTR_SOL_ADDR,     "iRSA" },
 228         { TAG_STATIC_ROUTE,     "pSR" },
 229         { TAG_USE_TRAILERS,     "BUT" },
 230         { TAG_ARP_TIMEOUT,      "lAT" },
 231         { TAG_ETH_ENCAP,        "BIE" },
 232         { TAG_TCP_TTL,          "bTT" },
 233         { TAG_TCP_KEEPALIVE,    "lKI" },
 234         { TAG_KEEPALIVE_GO,     "BKG" },
 235         { TAG_NIS_DOMAIN,       "aYD" },
 236         { TAG_NIS_SERVERS,      "iYS" },
 237         { TAG_NTP_SERVERS,      "iNTP" },
 238         { TAG_VENDOR_OPTS,      "bVO" },
 239         { TAG_NETBIOS_NS,       "iWNS" },
 240         { TAG_NETBIOS_DDS,      "iWDD" },
 241         { TAG_NETBIOS_NODE,     "$WNT" },
 242         { TAG_NETBIOS_SCOPE,    "aWSC" },
 243         { TAG_XWIN_FS,          "iXFS" },
 244         { TAG_XWIN_DM,          "iXDM" },
 245         { TAG_NIS_P_DOMAIN,     "sN+D" },
 246         { TAG_NIS_P_SERVERS,    "iN+S" },
 247         { TAG_MOBILE_HOME,      "iMH" },
 248         { TAG_SMPT_SERVER,      "iSMTP" },
 249         { TAG_POP3_SERVER,      "iPOP3" },
 250         { TAG_NNTP_SERVER,      "iNNTP" },
 251         { TAG_WWW_SERVER,       "iWWW" },
 252         { TAG_FINGER_SERVER,    "iFG" },
 253         { TAG_IRC_SERVER,       "iIRC" },
 254         { TAG_STREETTALK_SRVR,  "iSTS" },
 255         { TAG_STREETTALK_STDA,  "iSTDA" },
 256         { TAG_REQUESTED_IP,     "iRQ" },
 257         { TAG_IP_LEASE,         "lLT" },
 258         { TAG_OPT_OVERLOAD,     "$OO" },
 259         { TAG_TFTP_SERVER,      "aTFTP" },
 260         { TAG_BOOTFILENAME,     "aBF" },
 261         { TAG_DHCP_MESSAGE,     " DHCP" },
 262         { TAG_SERVER_ID,        "iSID" },
 263         { TAG_PARM_REQUEST,     "bPR" },
 264         { TAG_MESSAGE,          "aMSG" },
 265         { TAG_MAX_MSG_SIZE,     "sMSZ" },
 266         { TAG_RENEWAL_TIME,     "lRN" },
 267         { TAG_REBIND_TIME,      "lRB" },
 268         { TAG_VENDOR_CLASS,     "aVC" },
 269         { TAG_CLIENT_ID,        "$CID" },
 270 /* RFC 2485 */
 271         { TAG_OPEN_GROUP_UAP,   "aUAP" },
 272 /* RFC 2563 */
 273         { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
 274 /* RFC 2610 */
 275         { TAG_SLP_DA,           "bSLP-DA" },    /*"b" is a little wrong */
 276         { TAG_SLP_SCOPE,        "bSLP-SCOPE" }, /*"b" is a little wrong */
 277 /* RFC 2937 */
 278         { TAG_NS_SEARCH,        "sNSSEARCH" },  /* XXX 's' */
 279 /* RFC 3011 */
 280         { TAG_IP4_SUBNET_SELECT, "iSUBNET" },
 281 /* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
 282         { TAG_USER_CLASS,       "aCLASS" },
 283         { TAG_SLP_NAMING_AUTH,  "aSLP-NA" },
 284         { TAG_CLIENT_FQDN,      "$FQDN" },
 285         { TAG_AGENT_CIRCUIT,    "bACKT" },
 286         { TAG_AGENT_REMOTE,     "bARMT" },
 287         { TAG_AGENT_MASK,       "bAMSK" },
 288         { TAG_TZ_STRING,        "aTZSTR" },
 289         { TAG_FQDN_OPTION,      "bFQDNS" },     /* XXX 'b' */
 290         { TAG_AUTH,             "bAUTH" },      /* XXX 'b' */
 291         { TAG_VINES_SERVERS,    "iVINES" },
 292         { TAG_SERVER_RANK,      "sRANK" },
 293         { TAG_CLIENT_ARCH,      "sARCH" },
 294         { TAG_CLIENT_NDI,       "bNDI" },       /* XXX 'b' */
 295         { TAG_CLIENT_GUID,      "bGUID" },      /* XXX 'b' */
 296         { TAG_LDAP_URL,         "aLDAP" },
 297         { TAG_6OVER4,           "i6o4" },
 298         { TAG_PRINTER_NAME,     "aPRTR" },
 299         { TAG_MDHCP_SERVER,     "bMDHCP" },     /* XXX 'b' */
 300         { TAG_IPX_COMPAT,       "bIPX" },       /* XXX 'b' */
 301         { TAG_NETINFO_PARENT,   "iNI" },
 302         { TAG_NETINFO_PARENT_TAG, "aNITAG" },
 303         { TAG_URL,              "aURL" },
 304         { TAG_FAILOVER,         "bFAIL" },      /* XXX 'b' */
 305         { 0,                    NULL }
 306 };
 307 /* 2-byte extended tags */
 308 static struct tok xtag2str[] = {
 309         { 0,                    NULL }
 310 };
 311
 312 /* DHCP "options overload" types */
 313 static struct tok oo2str[] = {
 314         { 1,                    "file" },
 315         { 2,                    "sname" },
 316         { 3,                    "file+sname" },
 317         { 0,                    NULL }
 318 };
 319
 320 /* NETBIOS over TCP/IP node type options */
 321 static struct tok nbo2str[] = {
 322         { 0x1,                  "b-node" },
 323         { 0x2,                  "p-node" },
 324         { 0x4,                  "m-node" },
 325         { 0x8,                  "h-node" },
 326         { 0,                    NULL }
 327 };
 328
 329 /* ARP Hardware types, for Client-ID option */
 330 static struct tok arp2str[] = {
 331         { 0x1,                  "ether" },
 332         { 0x6,                  "ieee802" },
 333         { 0x7,                  "arcnet" },
 334         { 0xf,                  "frelay" },
 335         { 0x17,                 "strip" },
 336         { 0x18,                 "ieee1394" },
 337         { 0,                    NULL }
 338 };
 339
 340 static void
 341 rfc1048_print(register const u_char *bp)
 342 {
 343         register u_int16_t tag;
 344         register u_int len, size;
 345         register const char *cp;
 346         register char c;
 347         int first;
 348         u_int32_t ul;
 349         u_int16_t us;
 350         u_int8_t uc;
 351
 352         printf(" vend-rfc1048");
 353
 354         /* Step over magic cookie */
 355         bp += sizeof(int32_t);
 356
 357         /* Loop while we there is a tag left in the buffer */
 358         while (bp + 1 < snapend) {
 359                 tag = *bp++;
 360                 if (tag == TAG_PAD)
 361                         continue;
 362                 if (tag == TAG_END)
 363                         return;
 364                 if (tag == TAG_EXTENDED_OPTION) {
 365                         TCHECK2(*(bp + 1), 2);
 366                         tag = EXTRACT_16BITS(bp + 1);
 367                         /* XXX we don't know yet if the IANA will
 368                          * preclude overlap of 1-byte and 2-byte spaces.
 369                          * If not, we need to offset tag after this step.
 370                          */
 371                         cp = tok2str(xtag2str, "?xT%u", tag);
 372                 } else
 373                         cp = tok2str(tag2str, "?T%u", tag);
 374                 c = *cp++;
 375                 printf(" %s:", cp);
 376
 377                 /* Get the length; check for truncation */
 378                 if (bp + 1 >= snapend) {
 379                         fputs(tstr, stdout);
 380                         return;
 381                 }
 382                 len = *bp++;
 383                 if (bp + len >= snapend) {
 384                         fputs(tstr, stdout);
 385                         return;
 386                 }
 387
 388                 if (tag == TAG_DHCP_MESSAGE && len == 1) {
 389                         uc = *bp++;
 390                         switch (uc) {
 391                         case DHCPDISCOVER:      printf("DISCOVER");     break;
 392                         case DHCPOFFER:         printf("OFFER");        break;
 393                         case DHCPREQUEST:       printf("REQUEST");      break;
 394                         case DHCPDECLINE:       printf("DECLINE");      break;
 395                         case DHCPACK:           printf("ACK");          break;
 396                         case DHCPNAK:           printf("NACK");         break;
 397                         case DHCPRELEASE:       printf("RELEASE");      break;
 398                         case DHCPINFORM:        printf("INFORM");       break;
 399                         default:                printf("%u", uc);       break;
 400                         }
 401                         continue;
 402                 }
 403
 404                 if (tag == TAG_PARM_REQUEST) {
 405                         first = 1;
 406                         while (len-- > 0) {
 407                                 uc = *bp++;
 408                                 cp = tok2str(tag2str, "?T%u", uc);
 409                                 if (!first)
 410                                         putchar('+');
 411                                 printf("%s", cp + 1);
 412                                 first = 0;
 413                         }
 414                         continue;
 415                 }
 416                 if (tag == TAG_EXTENDED_REQUEST) {
 417                         first = 1;
 418                         while (len > 1) {
 419                                 len -= 2;
 420                                 us = EXTRACT_16BITS(bp);
 421                                 bp += 2;
 422                                 cp = tok2str(xtag2str, "?xT%u", us);
 423                                 if (!first)
 424                                         putchar('+');
 425                                 printf("%s", cp + 1);
 426                                 first = 0;
 427                         }
 428                         continue;
 429                 }
 430
 431                 /* Print data */
 432                 size = len;
 433                 if (c == '?') {
 434                         /* Base default formats for unknown tags on data size */
 435                         if (size & 1)
 436                                 c = 'b';
 437                         else if (size & 2)
 438                                 c = 's';
 439                         else
 440                                 c = 'l';
 441                 }
 442                 first = 1;
 443                 switch (c) {
 444
 445                 case 'a':
 446                         /* ascii strings */
 447                         putchar('"');
 448                         (void)fn_printn(bp, size, NULL);
 449                         putchar('"');
 450                         bp += size;
 451                         size = 0;
 452                         break;
 453
 454                 case 'i':
 455                 case 'l':
 456                 case 'L':
 457                         /* ip addresses/32-bit words */
 458                         while (size >= sizeof(ul)) {
 459                                 if (!first)
 460                                         putchar(',');
 461                                 ul = EXTRACT_32BITS(bp);
 462                                 if (c == 'i') {
 463                                         ul = htonl(ul);
 464                                         printf("%s", ipaddr_string(&ul));
 465                                 } else if (c == 'L')
 466                                         printf("%d", ul);
 467                                 else
 468                                         printf("%u", ul);
 469                                 bp += sizeof(ul);
 470                                 size -= sizeof(ul);
 471                                 first = 0;
 472                         }
 473                         break;
 474
 475                 case 'p':
 476                         /* IP address pairs */
 477                         while (size >= 2*sizeof(ul)) {
 478                                 if (!first)
 479                                         putchar(',');
 480                                 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
 481                                 printf("(%s:", ipaddr_string(&ul));
 482                                 bp += sizeof(ul);
 483                                 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
 484                                 printf("%s)", ipaddr_string(&ul));
 485                                 bp += sizeof(ul);
 486                                 size -= 2*sizeof(ul);
 487                                 first = 0;
 488                         }
 489                         break;
 490
 491                 case 's':
 492                         /* shorts */
 493                         while (size >= sizeof(us)) {
 494                                 if (!first)
 495                                         putchar(',');
 496                                 us = EXTRACT_16BITS(bp);
 497                                 printf("%u", us);
 498                                 bp += sizeof(us);
 499                                 size -= sizeof(us);
 500                                 first = 0;
 501                         }
 502                         break;
 503
 504                 case 'B':
 505                         /* boolean */
 506                         while (size > 0) {
 507                                 if (!first)
 508                                         putchar(',');
 509                                 switch (*bp) {
 510                                 case 0:
 511                                         putchar('N');
 512                                         break;
 513                                 case 1:
 514                                         putchar('Y');
 515                                         break;
 516                                 default:
 517                                         printf("%u?", *bp);
 518                                         break;
 519                                 }
 520                                 ++bp;
 521                                 --size;
 522                                 first = 0;
 523                         }
 524                         break;
 525
 526                 case 'b':
 527                 case 'x':
 528                 default:
 529                         /* Bytes */
 530                         while (size > 0) {
 531                                 if (!first)
 532                                         putchar(c == 'x' ? ':' : '.');
 533                                 if (c == 'x')
 534                                         printf("%02x", *bp);
 535                                 else
 536                                         printf("%u", *bp);
 537                                 ++bp;
 538                                 --size;
 539                                 first = 0;
 540                         }
 541                         break;
 542
 543                 case '$':
 544                         /* Guys we can't handle with one of the usual cases */
 545                         switch (tag) {
 546
 547                         case TAG_NETBIOS_NODE:
 548                                 tag = *bp++;
 549                                 --size;
 550                                 fputs(tok2str(nbo2str, NULL, tag), stdout);
 551                                 break;
 552
 553                         case TAG_OPT_OVERLOAD:
 554                                 tag = *bp++;
 555                                 --size;
 556                                 fputs(tok2str(oo2str, NULL, tag), stdout);
 557                                 break;
 558
 559                         case TAG_CLIENT_FQDN:
 560                                 if (*bp++)
 561                                         printf("[svrreg]");
 562                                 if (*bp)
 563                                         printf("%u/%u/", *bp, *(bp+1));
 564                                 bp += 2;
 565                                 putchar('"');
 566                                 (void)fn_printn(bp, size - 3, NULL);
 567                                 putchar('"');
 568                                 bp += size - 3;
 569                                 size = 0;
 570                                 break;
 571
 572                         case TAG_CLIENT_ID:
 573                             {   int type = *bp++;
 574                                 size--;
 575                                 if (type == 0) {
 576                                         putchar('"');
 577                                         (void)fn_printn(bp, size, NULL);
 578                                         putchar('"');
 579                                         break;
 580                                 } else {
 581                                         printf("[%s]", tok2str(arp2str, "type-%d", type));
 582                                 }
 583                                 while (size > 0) {
 584                                         if (!first)
 585                                                 putchar(':');
 586                                         printf("%02x", *bp);
 587                                         ++bp;
 588                                         --size;
 589                                         first = 0;
 590                                 }
 591                                 break;
 592                             }
 593
 594                         default:
 595                                 printf("[unknown special tag %u, size %u]",
 596                                     tag, size);
 597                                 bp += size;
 598                                 size = 0;
 599                                 break;
 600                         }
 601                         break;
 602                 }
 603                 /* Data left over? */
 604                 if (size)
 605                         printf("[len %u]", len);
 606         }
 607         return;
 608 trunc:
 609         printf("|[rfc1048]");
 610 }
 611
 612 static void
 613 cmu_print(register const u_char *bp)
 614 {
 615         register const struct cmu_vend *cmu;
 616
 617 #define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \
 618     if (cmu->m.s_addr != 0) \
 619         printf(" %s:%s", s, ipaddr_string(&cmu->m.s_addr)); }
 620
 621         printf(" vend-cmu");
 622         cmu = (const struct cmu_vend *)bp;
 623
 624         /* Only print if there are unknown bits */
 625         TCHECK(cmu->v_flags);
 626         if ((cmu->v_flags & ~(VF_SMASK)) != 0)
 627                 printf(" F:0x%x", cmu->v_flags);
 628         PRINTCMUADDR(v_dgate, "DG");
 629         PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
 630         PRINTCMUADDR(v_dns1, "NS1");
 631         PRINTCMUADDR(v_dns2, "NS2");
 632         PRINTCMUADDR(v_ins1, "IEN1");
 633         PRINTCMUADDR(v_ins2, "IEN2");
 634         PRINTCMUADDR(v_ts1, "TS1");
 635         PRINTCMUADDR(v_ts2, "TS2");
 636         return;
 637
 638 trunc:
 639         fputs(tstr, stdout);
 640 #undef PRINTCMUADDR
 641 }