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 1.73 2003-05-01 18:02:12 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_int length)
  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
  61         printf("BOOTP/DHCP, %s",
  62                tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op));
  63
  64         if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
  65                 TCHECK2(bp->bp_chaddr[0], 6);
  66                 printf(" from %s", etheraddr_string(bp->bp_chaddr));
  67         }
  68
  69         printf(", length: %u", length);
  70
  71         if (!vflag)
  72             return;
  73
  74         TCHECK(bp->bp_secs);
  75
  76         /* The usual hardware address type is 1 (10Mb Ethernet) */
  77         if (bp->bp_htype != 1)
  78                 printf(", htype-#%d", bp->bp_htype);
  79
  80         /* The usual length for 10Mb Ethernet address is 6 bytes */
  81         if (bp->bp_htype != 1 || bp->bp_hlen != 6)
  82                 printf(", hlen:%d", bp->bp_hlen);
  83
  84         /* Only print interesting fields */
  85         if (bp->bp_hops)
  86                 printf(", hops:%d", bp->bp_hops);
  87         if (bp->bp_xid)
  88                 printf(", xid:0x%x", EXTRACT_32BITS(&bp->bp_xid));
  89         if (bp->bp_secs)
  90                 printf(", secs:%d", EXTRACT_16BITS(&bp->bp_secs));
  91
  92         printf(", flags: [%s]",
  93                bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)));
  94         if (vflag>1)
  95           printf( " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags));
  96
  97         /* Client's ip address */
  98         TCHECK(bp->bp_ciaddr);
  99         if (bp->bp_ciaddr.s_addr)
 100                 printf("\n\t  Client IP: %s", ipaddr_string(&bp->bp_ciaddr));
 101
 102         /* 'your' ip address (bootp client) */
 103         TCHECK(bp->bp_yiaddr);
 104         if (bp->bp_yiaddr.s_addr)
 105                 printf("\n\t  Your IP: %s", ipaddr_string(&bp->bp_yiaddr));
 106
 107         /* Server's ip address */
 108         TCHECK(bp->bp_siaddr);
 109         if (bp->bp_siaddr.s_addr)
 110                 printf("\n\t  Server IP: %s", ipaddr_string(&bp->bp_siaddr));
 111
 112         /* Gateway's ip address */
 113         TCHECK(bp->bp_giaddr);
 114         if (bp->bp_giaddr.s_addr)
 115                 printf("\n\t  Gateway IP: %s", ipaddr_string(&bp->bp_giaddr));
 116
 117         /* Client's Ethernet address */
 118         if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
 119                 TCHECK2(bp->bp_chaddr[0], 6);
 120                 printf("\n\t  Client Ethernet Address: %s", etheraddr_string(bp->bp_chaddr));
 121         }
 122
 123         TCHECK2(bp->bp_sname[0], 1);            /* check first char only */
 124         if (*bp->bp_sname) {
 125                 printf("\n\t  sname \"");
 126                 if (fn_print(bp->bp_sname, snapend)) {
 127                         putchar('"');
 128                         fputs(tstr + 1, stdout);
 129                         return;
 130                 }
 131                 putchar('"');
 132         }
 133         TCHECK2(bp->bp_sname[0], 1);            /* check first char only */
 134         if (*bp->bp_file) {
 135                 printf("\n\t  file \"");
 136                 if (fn_print(bp->bp_file, snapend)) {
 137                         putchar('"');
 138                         fputs(tstr + 1, stdout);
 139                         return;
 140                 }
 141                 putchar('"');
 142         }
 143
 144         /* Decode the vendor buffer */
 145         TCHECK(bp->bp_vend[0]);
 146         if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
 147                  sizeof(u_int32_t)) == 0)
 148                 rfc1048_print(bp->bp_vend);
 149         else if (memcmp((const char *)bp->bp_vend, vm_cmu,
 150                       sizeof(u_int32_t)) == 0)
 151                 cmu_print(bp->bp_vend);
 152         else {
 153                 u_int32_t ul;
 154
 155                 ul = EXTRACT_32BITS(&bp->bp_vend);
 156                 if (ul != 0)
 157                         printf("\n\t  Vendor-#0x%x", ul);
 158         }
 159
 160         return;
 161 trunc:
 162         fputs(tstr, stdout);
 163 }
 164
 165 /*
 166  * The first character specifies the format to print:
 167  *     i - ip address (32 bits)
 168  *     p - ip address pairs (32 bits + 32 bits)
 169  *     l - long (32 bits)
 170  *     L - unsigned long (32 bits)
 171  *     s - short (16 bits)
 172  *     b - period-seperated decimal bytes (variable length)
 173  *     x - colon-seperated hex bytes (variable length)
 174  *     a - ascii string (variable length)
 175  *     B - on/off (8 bits)
 176  *     $ - special (explicit code to handle)
 177  */
 178 static struct tok tag2str[] = {
 179 /* RFC1048 tags */
 180         { TAG_PAD,              " PAD" },
 181         { TAG_SUBNET_MASK,      "iSM" },        /* subnet mask (RFC950) */
 182         { TAG_TIME_OFFSET,      "LTZ" },        /* seconds from UTC */
 183         { TAG_GATEWAY,          "iDG" },        /* default gateway */
 184         { TAG_TIME_SERVER,      "iTS" },        /* time servers (RFC868) */
 185         { TAG_NAME_SERVER,      "iIEN" },       /* IEN name servers (IEN116) */
 186         { TAG_DOMAIN_SERVER,    "iNS" },        /* domain name (RFC1035) */
 187         { TAG_LOG_SERVER,       "iLOG" },       /* MIT log servers */
 188         { TAG_COOKIE_SERVER,    "iCS" },        /* cookie servers (RFC865) */
 189         { TAG_LPR_SERVER,       "iLPR" },       /* lpr server (RFC1179) */
 190         { TAG_IMPRESS_SERVER,   "iIM" },        /* impress servers (Imagen) */
 191         { TAG_RLP_SERVER,       "iRL" },        /* resource location (RFC887) */
 192         { TAG_HOSTNAME,         "aHN" },        /* ascii hostname */
 193         { TAG_BOOTSIZE,         "sBS" },        /* 512 byte blocks */
 194         { TAG_END,              " END" },
 195 /* RFC1497 tags */
 196         { TAG_DUMPPATH,         "aDP" },
 197         { TAG_DOMAINNAME,       "aDN" },
 198         { TAG_SWAP_SERVER,      "iSS" },
 199         { TAG_ROOTPATH,         "aRP" },
 200         { TAG_EXTPATH,          "aEP" },
 201 /* RFC2132 tags */
 202         { TAG_IP_FORWARD,       "BIPF" },
 203         { TAG_NL_SRCRT,         "BSRT" },
 204         { TAG_PFILTERS,         "pPF" },
 205         { TAG_REASS_SIZE,       "sRSZ" },
 206         { TAG_DEF_TTL,          "bTTL" },
 207         { TAG_MTU_TIMEOUT,      "lMA" },
 208         { TAG_MTU_TABLE,        "sMT" },
 209         { TAG_INT_MTU,          "sMTU" },
 210         { TAG_LOCAL_SUBNETS,    "BLSN" },
 211         { TAG_BROAD_ADDR,       "iBR" },
 212         { TAG_DO_MASK_DISC,     "BMD" },
 213         { TAG_SUPPLY_MASK,      "BMS" },
 214         { TAG_DO_RDISC,         "BRD" },
 215         { TAG_RTR_SOL_ADDR,     "iRSA" },
 216         { TAG_STATIC_ROUTE,     "pSR" },
 217         { TAG_USE_TRAILERS,     "BUT" },
 218         { TAG_ARP_TIMEOUT,      "lAT" },
 219         { TAG_ETH_ENCAP,        "BIE" },
 220         { TAG_TCP_TTL,          "bTT" },
 221         { TAG_TCP_KEEPALIVE,    "lKI" },
 222         { TAG_KEEPALIVE_GO,     "BKG" },
 223         { TAG_NIS_DOMAIN,       "aYD" },
 224         { TAG_NIS_SERVERS,      "iYS" },
 225         { TAG_NTP_SERVERS,      "iNTP" },
 226         { TAG_VENDOR_OPTS,      "bVO" },
 227         { TAG_NETBIOS_NS,       "iWNS" },
 228         { TAG_NETBIOS_DDS,      "iWDD" },
 229         { TAG_NETBIOS_NODE,     "$WNT" },
 230         { TAG_NETBIOS_SCOPE,    "aWSC" },
 231         { TAG_XWIN_FS,          "iXFS" },
 232         { TAG_XWIN_DM,          "iXDM" },
 233         { TAG_NIS_P_DOMAIN,     "sN+D" },
 234         { TAG_NIS_P_SERVERS,    "iN+S" },
 235         { TAG_MOBILE_HOME,      "iMH" },
 236         { TAG_SMPT_SERVER,      "iSMTP" },
 237         { TAG_POP3_SERVER,      "iPOP3" },
 238         { TAG_NNTP_SERVER,      "iNNTP" },
 239         { TAG_WWW_SERVER,       "iWWW" },
 240         { TAG_FINGER_SERVER,    "iFG" },
 241         { TAG_IRC_SERVER,       "iIRC" },
 242         { TAG_STREETTALK_SRVR,  "iSTS" },
 243         { TAG_STREETTALK_STDA,  "iSTDA" },
 244         { TAG_REQUESTED_IP,     "iRQ" },
 245         { TAG_IP_LEASE,         "lLT" },
 246         { TAG_OPT_OVERLOAD,     "$OO" },
 247         { TAG_TFTP_SERVER,      "aTFTP" },
 248         { TAG_BOOTFILENAME,     "aBF" },
 249         { TAG_DHCP_MESSAGE,     " DHCP" },
 250         { TAG_SERVER_ID,        "iSID" },
 251         { TAG_PARM_REQUEST,     "bPR" },
 252         { TAG_MESSAGE,          "aMSG" },
 253         { TAG_MAX_MSG_SIZE,     "sMSZ" },
 254         { TAG_RENEWAL_TIME,     "lRN" },
 255         { TAG_REBIND_TIME,      "lRB" },
 256         { TAG_VENDOR_CLASS,     "aVC" },
 257         { TAG_CLIENT_ID,        "$CID" },
 258 /* RFC 2485 */
 259         { TAG_OPEN_GROUP_UAP,   "aUAP" },
 260 /* RFC 2563 */
 261         { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
 262 /* RFC 2610 */
 263         { TAG_SLP_DA,           "bSLP-DA" },    /*"b" is a little wrong */
 264         { TAG_SLP_SCOPE,        "bSLP-SCOPE" }, /*"b" is a little wrong */
 265 /* RFC 2937 */
 266         { TAG_NS_SEARCH,        "sNSSEARCH" },  /* XXX 's' */
 267 /* RFC 3011 */
 268         { TAG_IP4_SUBNET_SELECT, "iSUBNET" },
 269 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
 270         { TAG_USER_CLASS,       "aCLASS" },
 271         { TAG_SLP_NAMING_AUTH,  "aSLP-NA" },
 272         { TAG_CLIENT_FQDN,      "$FQDN" },
 273         { TAG_AGENT_CIRCUIT,    "bACKT" },
 274         { TAG_AGENT_REMOTE,     "bARMT" },
 275         { TAG_AGENT_MASK,       "bAMSK" },
 276         { TAG_TZ_STRING,        "aTZSTR" },
 277         { TAG_FQDN_OPTION,      "bFQDNS" },     /* XXX 'b' */
 278         { TAG_AUTH,             "bAUTH" },      /* XXX 'b' */
 279         { TAG_VINES_SERVERS,    "iVINES" },
 280         { TAG_SERVER_RANK,      "sRANK" },
 281         { TAG_CLIENT_ARCH,      "sARCH" },
 282         { TAG_CLIENT_NDI,       "bNDI" },       /* XXX 'b' */
 283         { TAG_CLIENT_GUID,      "bGUID" },      /* XXX 'b' */
 284         { TAG_LDAP_URL,         "aLDAP" },
 285         { TAG_6OVER4,           "i6o4" },
 286         { TAG_PRINTER_NAME,     "aPRTR" },
 287         { TAG_MDHCP_SERVER,     "bMDHCP" },     /* XXX 'b' */
 288         { TAG_IPX_COMPAT,       "bIPX" },       /* XXX 'b' */
 289         { TAG_NETINFO_PARENT,   "iNI" },
 290         { TAG_NETINFO_PARENT_TAG, "aNITAG" },
 291         { TAG_URL,              "aURL" },
 292         { TAG_FAILOVER,         "bFAIL" },      /* XXX 'b' */
 293         { 0,                    NULL }
 294 };
 295 /* 2-byte extended tags */
 296 static struct tok xtag2str[] = {
 297         { 0,                    NULL }
 298 };
 299
 300 /* DHCP "options overload" types */
 301 static struct tok oo2str[] = {
 302         { 1,                    "file" },
 303         { 2,                    "sname" },
 304         { 3,                    "file+sname" },
 305         { 0,                    NULL }
 306 };
 307
 308 /* NETBIOS over TCP/IP node type options */
 309 static struct tok nbo2str[] = {
 310         { 0x1,                  "b-node" },
 311         { 0x2,                  "p-node" },
 312         { 0x4,                  "m-node" },
 313         { 0x8,                  "h-node" },
 314         { 0,                    NULL }
 315 };
 316
 317 /* ARP Hardware types, for Client-ID option */
 318 static struct tok arp2str[] = {
 319         { 0x1,                  "ether" },
 320         { 0x6,                  "ieee802" },
 321         { 0x7,                  "arcnet" },
 322         { 0xf,                  "frelay" },
 323         { 0x17,                 "strip" },
 324         { 0x18,                 "ieee1394" },
 325         { 0,                    NULL }
 326 };
 327
 328 static void
 329 rfc1048_print(register const u_char *bp)
 330 {
 331         register u_int16_t tag;
 332         register u_int len, size;
 333         register const char *cp;
 334         register char c;
 335         int first;
 336         u_int32_t ul;
 337         u_int16_t us;
 338         u_int8_t uc;
 339
 340         printf("\n\t  Vendor-rfc1048:");
 341
 342         /* Step over magic cookie */
 343         bp += sizeof(int32_t);
 344
 345         /* Loop while we there is a tag left in the buffer */
 346         while (bp + 1 < snapend) {
 347                 tag = *bp++;
 348                 if (tag == TAG_PAD)
 349                         continue;
 350                 if (tag == TAG_END)
 351                         return;
 352                 if (tag == TAG_EXTENDED_OPTION) {
 353                         TCHECK2(*(bp + 1), 2);
 354                         tag = EXTRACT_16BITS(bp + 1);
 355                         /* XXX we don't know yet if the IANA will
 356                          * preclude overlap of 1-byte and 2-byte spaces.
 357                          * If not, we need to offset tag after this step.
 358                          */
 359                         cp = tok2str(xtag2str, "?xT%u", tag);
 360                 } else
 361                         cp = tok2str(tag2str, "?T%u", tag);
 362                 c = *cp++;
 363                 printf("\n\t    %s:", cp);
 364
 365                 /* Get the length; check for truncation */
 366                 if (bp + 1 >= snapend) {
 367                         fputs(tstr, stdout);
 368                         return;
 369                 }
 370                 len = *bp++;
 371                 if (bp + len >= snapend) {
 372                         printf("[|bootp %u]", len);
 373                         return;
 374                 }
 375
 376                 if (tag == TAG_DHCP_MESSAGE && len == 1) {
 377                         uc = *bp++;
 378                         switch (uc) {
 379                         case DHCPDISCOVER:      printf("DISCOVER");     break;
 380                         case DHCPOFFER:         printf("OFFER");        break;
 381                         case DHCPREQUEST:       printf("REQUEST");      break;
 382                         case DHCPDECLINE:       printf("DECLINE");      break;
 383                         case DHCPACK:           printf("ACK");          break;
 384                         case DHCPNAK:           printf("NACK");         break;
 385                         case DHCPRELEASE:       printf("RELEASE");      break;
 386                         case DHCPINFORM:        printf("INFORM");       break;
 387                         default:                printf("%u", uc);       break;
 388                         }
 389                         continue;
 390                 }
 391
 392                 if (tag == TAG_PARM_REQUEST) {
 393                         first = 1;
 394                         while (len-- > 0) {
 395                                 uc = *bp++;
 396                                 cp = tok2str(tag2str, "?T%u", uc);
 397                                 if (!first)
 398                                         putchar('+');
 399                                 printf("%s", cp + 1);
 400                                 first = 0;
 401                         }
 402                         continue;
 403                 }
 404                 if (tag == TAG_EXTENDED_REQUEST) {
 405                         first = 1;
 406                         while (len > 1) {
 407                                 len -= 2;
 408                                 us = EXTRACT_16BITS(bp);
 409                                 bp += 2;
 410                                 cp = tok2str(xtag2str, "?xT%u", us);
 411                                 if (!first)
 412                                         putchar('+');
 413                                 printf("%s", cp + 1);
 414                                 first = 0;
 415                         }
 416                         continue;
 417                 }
 418
 419                 /* Print data */
 420                 size = len;
 421                 if (c == '?') {
 422                         /* Base default formats for unknown tags on data size */
 423                         if (size & 1)
 424                                 c = 'b';
 425                         else if (size & 2)
 426                                 c = 's';
 427                         else
 428                                 c = 'l';
 429                 }
 430                 first = 1;
 431                 switch (c) {
 432
 433                 case 'a':
 434                         /* ascii strings */
 435                         putchar('"');
 436                         (void)fn_printn(bp, size, NULL);
 437                         putchar('"');
 438                         bp += size;
 439                         size = 0;
 440                         break;
 441
 442                 case 'i':
 443                 case 'l':
 444                 case 'L':
 445                         /* ip addresses/32-bit words */
 446                         while (size >= sizeof(ul)) {
 447                                 if (!first)
 448                                         putchar(',');
 449                                 ul = EXTRACT_32BITS(bp);
 450                                 if (c == 'i') {
 451                                         ul = htonl(ul);
 452                                         printf("%s", ipaddr_string(&ul));
 453                                 } else if (c == 'L')
 454                                         printf("%d", ul);
 455                                 else
 456                                         printf("%u", ul);
 457                                 bp += sizeof(ul);
 458                                 size -= sizeof(ul);
 459                                 first = 0;
 460                         }
 461                         break;
 462
 463                 case 'p':
 464                         /* IP address pairs */
 465                         while (size >= 2*sizeof(ul)) {
 466                                 if (!first)
 467                                         putchar(',');
 468                                 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
 469                                 printf("(%s:", ipaddr_string(&ul));
 470                                 bp += sizeof(ul);
 471                                 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
 472                                 printf("%s)", ipaddr_string(&ul));
 473                                 bp += sizeof(ul);
 474                                 size -= 2*sizeof(ul);
 475                                 first = 0;
 476                         }
 477                         break;
 478
 479                 case 's':
 480                         /* shorts */
 481                         while (size >= sizeof(us)) {
 482                                 if (!first)
 483                                         putchar(',');
 484                                 us = EXTRACT_16BITS(bp);
 485                                 printf("%u", us);
 486                                 bp += sizeof(us);
 487                                 size -= sizeof(us);
 488                                 first = 0;
 489                         }
 490                         break;
 491
 492                 case 'B':
 493                         /* boolean */
 494                         while (size > 0) {
 495                                 if (!first)
 496                                         putchar(',');
 497                                 switch (*bp) {
 498                                 case 0:
 499                                         putchar('N');
 500                                         break;
 501                                 case 1:
 502                                         putchar('Y');
 503                                         break;
 504                                 default:
 505                                         printf("%u?", *bp);
 506                                         break;
 507                                 }
 508                                 ++bp;
 509                                 --size;
 510                                 first = 0;
 511                         }
 512                         break;
 513
 514                 case 'b':
 515                 case 'x':
 516                 default:
 517                         /* Bytes */
 518                         while (size > 0) {
 519                                 if (!first)
 520                                         putchar(c == 'x' ? ':' : '.');
 521                                 if (c == 'x')
 522                                         printf("%02x", *bp);
 523                                 else
 524                                         printf("%u", *bp);
 525                                 ++bp;
 526                                 --size;
 527                                 first = 0;
 528                         }
 529                         break;
 530
 531                 case '$':
 532                         /* Guys we can't handle with one of the usual cases */
 533                         switch (tag) {
 534
 535                         case TAG_NETBIOS_NODE:
 536                                 tag = *bp++;
 537                                 --size;
 538                                 fputs(tok2str(nbo2str, NULL, tag), stdout);
 539                                 break;
 540
 541                         case TAG_OPT_OVERLOAD:
 542                                 tag = *bp++;
 543                                 --size;
 544                                 fputs(tok2str(oo2str, NULL, tag), stdout);
 545                                 break;
 546
 547                         case TAG_CLIENT_FQDN:
 548                                 if (*bp++)
 549                                         printf("[svrreg]");
 550                                 if (*bp)
 551                                         printf("%u/%u/", *bp, *(bp+1));
 552                                 bp += 2;
 553                                 putchar('"');
 554                                 (void)fn_printn(bp, size - 3, NULL);
 555                                 putchar('"');
 556                                 bp += size - 3;
 557                                 size = 0;
 558                                 break;
 559
 560                         case TAG_CLIENT_ID:
 561                             {   int type = *bp++;
 562                                 size--;
 563                                 if (type == 0) {
 564                                         putchar('"');
 565                                         (void)fn_printn(bp, size, NULL);
 566                                         putchar('"');
 567                                         bp += size;
 568                                         size = 0;
 569                                         break;
 570                                 } else {
 571                                         printf("[%s]", tok2str(arp2str, "type-%d", type));
 572                                 }
 573                                 while (size > 0) {
 574                                         if (!first)
 575                                                 putchar(':');
 576                                         printf("%02x", *bp);
 577                                         ++bp;
 578                                         --size;
 579                                         first = 0;
 580                                 }
 581                                 break;
 582                             }
 583
 584                         default:
 585                                 printf("[unknown special tag %u, size %u]",
 586                                     tag, size);
 587                                 bp += size;
 588                                 size = 0;
 589                                 break;
 590                         }
 591                         break;
 592                 }
 593                 /* Data left over? */
 594                 if (size) {
 595                         printf("[len %u]", len);
 596                         bp += size;
 597                 }
 598         }
 599         return;
 600 trunc:
 601         printf("|[rfc1048]");
 602 }
 603
 604 static void
 605 cmu_print(register const u_char *bp)
 606 {
 607         register const struct cmu_vend *cmu;
 608
 609 #define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \
 610     if (cmu->m.s_addr != 0) \
 611         printf(" %s:%s", s, ipaddr_string(&cmu->m.s_addr)); }
 612
 613         printf(" vend-cmu");
 614         cmu = (const struct cmu_vend *)bp;
 615
 616         /* Only print if there are unknown bits */
 617         TCHECK(cmu->v_flags);
 618         if ((cmu->v_flags & ~(VF_SMASK)) != 0)
 619                 printf(" F:0x%x", cmu->v_flags);
 620         PRINTCMUADDR(v_dgate, "DG");
 621         PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
 622         PRINTCMUADDR(v_dns1, "NS1");
 623         PRINTCMUADDR(v_dns2, "NS2");
 624         PRINTCMUADDR(v_ins1, "IEN1");
 625         PRINTCMUADDR(v_ins2, "IEN2");
 626         PRINTCMUADDR(v_ts1, "TS1");
 627         PRINTCMUADDR(v_ts2, "TS2");
 628         return;
 629
 630 trunc:
 631         fputs(tstr, stdout);
 632 #undef PRINTCMUADDR
 633 }