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

   1 /*
   2  * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #ifndef lint
  23 static const char rcsid[] _U_ =
  24         "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.32 2005-04-06 21:32:39 mcr Exp $ (LBL)";
  25 #endif
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include <tcpdump-stdinc.h>
  32
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <pcap.h>
  36
  37 #include "addrtoname.h"
  38 #include "interface.h"
  39 #include "ethertype.h"
  40 #include "nlpid.h"
  41 #include "extract.h"
  42 #include "oui.h"
  43
  44 static void frf15_print(const u_char *, u_int);
  45
  46 /*
  47  * the frame relay header has a variable length
  48  *
  49  * the EA bit determines if there is another byte
  50  * in the header
  51  *
  52  * minimum header length is 2 bytes
  53  * maximum header length is 4 bytes
  54  *
  55  *      7    6    5    4    3    2    1    0
  56  *    +----+----+----+----+----+----+----+----+
  57  *    |        DLCI (6 bits)        | CR | EA |
  58  *    +----+----+----+----+----+----+----+----+
  59  *    |   DLCI (4 bits)   |FECN|BECN| DE | EA |
  60  *    +----+----+----+----+----+----+----+----+
  61  *    |           DLCI (7 bits)          | EA |
  62  *    +----+----+----+----+----+----+----+----+
  63  *    |        DLCI (6 bits)        |SDLC| EA |
  64  *    +----+----+----+----+----+----+----+----+
  65  */
  66
  67 #define FR_EA_BIT       0x01
  68
  69 #define FR_CR_BIT       0x02000000
  70 #define FR_DE_BIT       0x00020000
  71 #define FR_BECN_BIT     0x00040000
  72 #define FR_FECN_BIT     0x00080000
  73 #define FR_SDLC_BIT     0x00000002
  74
  75
  76 struct tok fr_header_flag_values[] = {
  77     { FR_CR_BIT, "C!" },
  78     { FR_DE_BIT, "DE" },
  79     { FR_BECN_BIT, "BECN" },
  80     { FR_FECN_BIT, "FECN" },
  81     { FR_SDLC_BIT, "sdlcore" },
  82     { 0, NULL }
  83 };
  84
  85
  86 /* Finds out Q.922 address length, DLCI and flags. Returns 0 on success
  87  * save the flags dep. on address length
  88  */
  89 static int parse_q922_addr(const u_char *p, u_int *dlci, u_int *sdlcore,
  90                            u_int *addr_len, u_int8_t *flags)
  91 {
  92         if ((p[0] & FR_EA_BIT))
  93                 return -1;
  94
  95         *addr_len = 2;
  96         *dlci = ((p[0] & 0xFC) << 2) | ((p[1] & 0xF0) >> 4);
  97
  98         flags[0] = p[0] & 0x02; /* populate the first flag fields */
  99         flags[1] = p[1] & 0x0c;
 100
 101         if (p[1] & FR_EA_BIT)
 102                 return 0;       /* 2-byte Q.922 address */
 103
 104         p += 2;
 105         (*addr_len)++;          /* 3- or 4-byte Q.922 address */
 106         if ((p[0] & FR_EA_BIT) == 0) {
 107                 *dlci = (*dlci << 7) | (p[0] >> 1);
 108                 (*addr_len)++;  /* 4-byte Q.922 address */
 109                 p++;
 110         }
 111
 112         if ((p[0] & FR_EA_BIT) == 0)
 113                 return -1; /* more than 4 bytes of Q.922 address? */
 114
 115         flags[3] = p[0] & 0x02;
 116
 117         if (p[0] & 0x02)
 118                 *sdlcore =  p[0] >> 2;
 119         else
 120                 *dlci = (*dlci << 6) | (p[0] >> 2);
 121
 122         return 0;
 123 }
 124
 125 /* Frame Relay packet structure, with flags and CRC removed
 126
 127                   +---------------------------+
 128                   |       Q.922 Address*      |
 129                   +--                       --+
 130                   |                           |
 131                   +---------------------------+
 132                   | Control (UI = 0x03)       |
 133                   +---------------------------+
 134                   | Optional Pad      (0x00)  |
 135                   +---------------------------+
 136                   | NLPID                     |
 137                   +---------------------------+
 138                   |             .             |
 139                   |             .             |
 140                   |             .             |
 141                   |           Data            |
 142                   |             .             |
 143                   |             .             |
 144                   +---------------------------+
 145
 146            * Q.922 addresses, as presently defined, are two octets and
 147              contain a 10-bit DLCI.  In some networks Q.922 addresses
 148              may optionally be increased to three or four octets.
 149 */
 150
 151 static u_int
 152 fr_hdrlen(const u_char *p, u_int addr_len, u_int caplen)
 153 {
 154         if ((caplen > addr_len + 1 /* UI */ + 1 /* pad */) &&
 155             !p[addr_len + 1] /* pad exist */)
 156                 return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */;
 157         else
 158                 return addr_len + 1 /* UI */ + 1 /* NLPID */;
 159 }
 160
 161 static void
 162 fr_hdr_print(int length, u_int addr_len, u_int dlci, u_int8_t *flags, u_int16_t nlpid)
 163 {
 164     if (qflag) {
 165         (void)printf("Q.922, DLCI %u, length %u: ",
 166                      dlci,
 167                      length);
 168     } else {
 169         if (nlpid <= 0xff) /* if its smaller than 256 then its a NLPID */
 170             (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], NLPID %s (0x%02x), length %u: ",
 171                          addr_len,
 172                          dlci,
 173                          bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
 174                          tok2str(nlpid_values,"unknown", nlpid),
 175                          nlpid,
 176                          length);
 177         else /* must be an ethertype */
 178             (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ",
 179                          addr_len,
 180                          dlci,
 181                          bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)),
 182                          tok2str(ethertype_values, "unknown", nlpid),
 183                          nlpid,
 184                          length);
 185     }
 186 }
 187
 188 u_int
 189 fr_if_print(const struct pcap_pkthdr *h, register const u_char *p)
 190 {
 191         register u_int length = h->len;
 192         register u_int caplen = h->caplen;
 193         u_int16_t extracted_ethertype;
 194         u_int32_t orgcode;
 195         register u_short et;
 196         u_int dlci;
 197         u_int sdlcore;
 198         u_int addr_len;
 199         u_int16_t nlpid;
 200         u_int hdr_len;
 201         u_int8_t flags[4];
 202
 203         if (caplen < 4) {       /* minimum frame header length */
 204                 printf("[|fr]");
 205                 return caplen;
 206         }
 207
 208         if (parse_q922_addr(p, &dlci, &sdlcore, &addr_len, flags)) {
 209                 printf("Q.922, invalid address");
 210                 return caplen;
 211         }
 212
 213         hdr_len = fr_hdrlen(p, addr_len, caplen);
 214
 215         if (caplen < hdr_len) {
 216                 printf("[|fr]");
 217                 return caplen;
 218         }
 219
 220         if (p[addr_len] != 0x03 && dlci != 0) {
 221
 222                 /* lets figure out if we have cisco style encapsulation: */
 223                 extracted_ethertype = EXTRACT_16BITS(p+addr_len);
 224
 225                 if (eflag)
 226                     fr_hdr_print(length, addr_len, dlci, flags, extracted_ethertype);
 227
 228                 if (ether_encap_print(extracted_ethertype,
 229                                       p+addr_len+ETHERTYPE_LEN,
 230                                       length-addr_len-ETHERTYPE_LEN,
 231                                       caplen-addr_len-ETHERTYPE_LEN,
 232                                       &extracted_ethertype) == 0)
 233                     /* ether_type not known, probably it wasn't one */
 234                     printf("UI %02x! ", p[addr_len]);
 235                 else
 236                     return hdr_len;
 237         }
 238
 239         if (!p[addr_len + 1]) { /* pad byte should be used with 3-byte Q.922 */
 240                 if (addr_len != 3)
 241                         printf("Pad! ");
 242         } else if (addr_len == 3)
 243                 printf("No pad! ");
 244
 245         nlpid = p[hdr_len - 1];
 246
 247         if (eflag)
 248                 fr_hdr_print(length, addr_len, dlci, flags, nlpid);
 249
 250         p += hdr_len;
 251         length -= hdr_len;
 252         caplen -= hdr_len;
 253
 254         switch (nlpid) {
 255         case NLPID_IP:
 256                 ip_print(gndo, p, length);
 257                 break;
 258
 259 #ifdef INET6
 260         case NLPID_IP6:
 261                 ip6_print(p, length);
 262                 break;
 263 #endif
 264         case NLPID_CLNP:
 265         case NLPID_ESIS:
 266         case NLPID_ISIS:
 267                 isoclns_print(p-1, length+1, caplen+1); /* OSI printers need the NLPID field */
 268                 break;
 269
 270         case NLPID_SNAP:
 271                 orgcode = EXTRACT_24BITS(p);
 272                 et = EXTRACT_16BITS(p + 3);
 273
 274                 if (eflag)
 275                     (void)printf("SNAP, oui %s (0x%06x), ethertype %s (0x%04x): ",
 276                                  tok2str(oui_values,"Unknown",orgcode),
 277                                  orgcode,
 278                                  tok2str(ethertype_values,"Unknown", et),
 279                                  et);
 280
 281                 if (snap_print((const u_char *)(p + 5), length - 5,
 282                            caplen - 5, &extracted_ethertype, orgcode, et,
 283                            0) == 0) {
 284                         /* ether_type not known, print raw packet */
 285                         if (!eflag)
 286                             fr_hdr_print(length + hdr_len, hdr_len,
 287                                          dlci, flags, nlpid);
 288                         if (!xflag && !qflag)
 289                             default_print(p - hdr_len, caplen + hdr_len);
 290                 }
 291                 break;
 292
 293         case NLPID_Q933:
 294                 q933_print(p, length);
 295                 break;
 296
 297         case NLPID_MFR:
 298                 frf15_print(p, length);
 299                 break;
 300
 301         default:
 302                 if (!eflag)
 303                     fr_hdr_print(length + hdr_len, addr_len,
 304                                      dlci, flags, nlpid);
 305                 if (!xflag)
 306                         default_print(p, caplen);
 307         }
 308
 309         return hdr_len;
 310 }
 311
 312 /* an NLPID of 0xb1 indicates a 2-byte
 313  * FRF.15 header
 314  *
 315  *      7    6    5    4    3    2    1    0
 316  *    +----+----+----+----+----+----+----+----+
 317  *    ~              Q.922 header             ~
 318  *    +----+----+----+----+----+----+----+----+
 319  *    |             NLPID (8 bits)            | NLPID=0xb1
 320  *    +----+----+----+----+----+----+----+----+
 321  *    | B  | E  | C  |seq. (high 4 bits) | R  |
 322  *    +----+----+----+----+----+----+----+----+
 323  *    |        sequence  (low 8 bits)         |
 324  *    +----+----+----+----+----+----+----+----+
 325  */
 326
 327 struct tok frf15_flag_values[] = {
 328     { 0x80, "Begin" },
 329     { 0x40, "End" },
 330     { 0x20, "Control" },
 331     { 0, NULL }
 332 };
 333
 334 #define FR_FRF15_FRAGTYPE 0x01
 335
 336 static void
 337 frf15_print (const u_char *p, u_int length) {
 338
 339     u_int16_t sequence_num, flags;
 340
 341     flags = p[0]&0xe0;
 342     sequence_num = (p[0]&0x1e)<<7 | p[1];
 343
 344     printf("FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u",
 345            sequence_num,
 346            bittok2str(frf15_flag_values,"none",flags),
 347            flags&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End",
 348            length);
 349
 350 /* TODO:
 351  * depending on all permutations of the B, E and C bit
 352  * dig as deep as we can - e.g. on the first (B) fragment
 353  * there is enough payload to print the IP header
 354  * on non (B) fragments it depends if the fragmentation
 355  * model is end-to-end or interface based wether we want to print
 356  * another Q.922 header
 357  */
 358
 359 }
 360
 361 /*
 362  * Q.933 decoding portion for framerelay specific.
 363  */
 364
 365 /* Q.933 packet format
 366                       Format of Other Protocols
 367                           using Q.933 NLPID
 368                   +-------------------------------+
 369                   |        Q.922 Address          |
 370                   +---------------+---------------+
 371                   |Control  0x03  | NLPID   0x08  |
 372                   +---------------+---------------+
 373                   |          L2 Protocol ID       |
 374                   | octet 1       |  octet 2      |
 375                   +-------------------------------+
 376                   |          L3 Protocol ID       |
 377                   | octet 2       |  octet 2      |
 378                   +-------------------------------+
 379                   |         Protocol Data         |
 380                   +-------------------------------+
 381                   | FCS                           |
 382                   +-------------------------------+
 383  */
 384
 385 /* L2 (Octet 1)- Call Reference Usually is 0x0 */
 386
 387 /*
 388  * L2 (Octet 2)- Message Types definition 1 byte long.
 389  */
 390 /* Call Establish */
 391 #define MSG_TYPE_ESC_TO_NATIONAL  0x00
 392 #define MSG_TYPE_ALERT            0x01
 393 #define MSG_TYPE_CALL_PROCEEDING  0x02
 394 #define MSG_TYPE_CONNECT          0x07
 395 #define MSG_TYPE_CONNECT_ACK      0x0F
 396 #define MSG_TYPE_PROGRESS         0x03
 397 #define MSG_TYPE_SETUP            0x05
 398 /* Call Clear */
 399 #define MSG_TYPE_DISCONNECT       0x45
 400 #define MSG_TYPE_RELEASE          0x4D
 401 #define MSG_TYPE_RELEASE_COMPLETE 0x5A
 402 #define MSG_TYPE_RESTART          0x46
 403 #define MSG_TYPE_RESTART_ACK      0x4E
 404 /* Status */
 405 #define MSG_TYPE_STATUS           0x7D
 406 #define MSG_TYPE_STATUS_ENQ       0x75
 407
 408 struct tok fr_q933_msg_values[] = {
 409     { MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" },
 410     { MSG_TYPE_ALERT, "Alert" },
 411     { MSG_TYPE_CALL_PROCEEDING, "Call proceeding" },
 412     { MSG_TYPE_CONNECT, "Connect" },
 413     { MSG_TYPE_CONNECT_ACK, "Connect ACK" },
 414     { MSG_TYPE_PROGRESS, "Progress" },
 415     { MSG_TYPE_SETUP, "Setup" },
 416     { MSG_TYPE_DISCONNECT, "Disconnect" },
 417     { MSG_TYPE_RELEASE, "Release" },
 418     { MSG_TYPE_RELEASE_COMPLETE, "Release Complete" },
 419     { MSG_TYPE_RESTART, "Restart" },
 420     { MSG_TYPE_RESTART_ACK, "Restart ACK" },
 421     { MSG_TYPE_STATUS, "Status Reply" },
 422     { MSG_TYPE_STATUS_ENQ, "Status Enquiry" },
 423     { 0, NULL }
 424 };
 425
 426 #define MSG_ANSI_LOCKING_SHIFT  0x95
 427
 428 #define FR_LMI_ANSI_REPORT_TYPE_IE      0x01
 429 #define FR_LMI_ANSI_LINK_VERIFY_IE_91   0x19 /* details? */
 430 #define FR_LMI_ANSI_LINK_VERIFY_IE      0x03
 431 #define FR_LMI_ANSI_PVC_STATUS_IE       0x07
 432
 433 #define FR_LMI_CCITT_REPORT_TYPE_IE     0x51
 434 #define FR_LMI_CCITT_LINK_VERIFY_IE     0x53
 435 #define FR_LMI_CCITT_PVC_STATUS_IE      0x57
 436
 437 struct tok fr_q933_ie_values_codeset5[] = {
 438     { FR_LMI_ANSI_REPORT_TYPE_IE, "ANSI Report Type" },
 439     { FR_LMI_ANSI_LINK_VERIFY_IE_91, "ANSI Link Verify" },
 440     { FR_LMI_ANSI_LINK_VERIFY_IE, "ANSI Link Verify" },
 441     { FR_LMI_ANSI_PVC_STATUS_IE, "ANSI PVC Status" },
 442     { FR_LMI_CCITT_REPORT_TYPE_IE, "CCITT Report Type" },
 443     { FR_LMI_CCITT_LINK_VERIFY_IE, "CCITT Link Verify" },
 444     { FR_LMI_CCITT_PVC_STATUS_IE, "CCITT PVC Status" },
 445     { 0, NULL }
 446 };
 447
 448 #define FR_LMI_REPORT_TYPE_IE_FULL_STATUS 0
 449 #define FR_LMI_REPORT_TYPE_IE_LINK_VERIFY 1
 450 #define FR_LMI_REPORT_TYPE_IE_ASYNC_PVC   2
 451
 452 struct tok fr_lmi_report_type_ie_values[] = {
 453     { FR_LMI_REPORT_TYPE_IE_FULL_STATUS, "Full Status" },
 454     { FR_LMI_REPORT_TYPE_IE_LINK_VERIFY, "Link verify" },
 455     { FR_LMI_REPORT_TYPE_IE_ASYNC_PVC, "Async PVC Status" },
 456     { 0, NULL }
 457 };
 458
 459 /* array of 16 codepages - currently we only support codepage 5 */
 460 static struct tok *fr_q933_ie_codesets[] = {
 461     NULL,
 462     NULL,
 463     NULL,
 464     NULL,
 465     NULL,
 466     fr_q933_ie_values_codeset5,
 467     NULL,
 468     NULL,
 469     NULL,
 470     NULL,
 471     NULL,
 472     NULL,
 473     NULL,
 474     NULL,
 475     NULL,
 476     NULL
 477 };
 478
 479
 480 struct common_ie_header {
 481     u_int8_t ie_id;
 482     u_int8_t ie_len;
 483 };
 484
 485 void
 486 q933_print(const u_char *p, u_int length)
 487 {
 488         const u_char *ptemp = p;
 489         struct common_ie_header *ie_p;
 490         int olen;
 491         int is_ansi = 0;
 492         u_int dlci,codeset;
 493
 494         if (length < 9) {       /* shortest: Q.933a LINK VERIFY */
 495                 printf("[|q.933]");
 496                 return;
 497         }
 498
 499         codeset = p[2]&0x0f;   /* extract the codeset */
 500
 501         if (p[2] == MSG_ANSI_LOCKING_SHIFT)
 502                 is_ansi = 1;
 503
 504         printf("%s", eflag ? "" : "Q.933, ");
 505
 506         /* printing out header part */
 507         printf(is_ansi ? "ANSI" : "CCITT ");
 508
 509         if (p[0])
 510                 printf(", Call Ref: 0x%02x", p[0]);
 511
 512         if (vflag)
 513             printf(", %s (0x%02x), length %u",
 514                    tok2str(fr_q933_msg_values,"unknown message",p[1]),
 515                    p[1],
 516                    length);
 517         else
 518             printf(", %s",
 519                    tok2str(fr_q933_msg_values,"unknown message 0x%02x",p[1]));
 520
 521         olen = length; /* preserve the original length for non verbose mode */
 522
 523         if (length < (u_int)(2 - is_ansi)) {
 524                 printf("[|q.933]");
 525                 return;
 526         }
 527         length -= 2 - is_ansi;
 528         ptemp += 2 + is_ansi;
 529
 530         /* Loop through the rest of IE */
 531         while (length > sizeof(struct common_ie_header)) {
 532                 ie_p = (struct common_ie_header *)ptemp;
 533                 if (length < sizeof(struct common_ie_header) ||
 534                     length < sizeof(struct common_ie_header) + ie_p->ie_len) {
 535                     if (vflag) /* not bark if there is just a trailer */
 536                         printf("\n[|q.933]");
 537                     else
 538                         printf(", length %u",olen);
 539                     return;
 540                 }
 541
 542                 /* lets do the full IE parsing only in verbose mode
 543                  * however some IEs (DLCI Status, Link Verify)
 544                  * are also intereststing in non-verbose mode */
 545                 if (vflag)
 546                     printf("\n\t%s IE (%u), length %u: ",
 547                            tok2str(fr_q933_ie_codesets[codeset],"unknown",ie_p->ie_id),
 548                            ie_p->ie_id,
 549                            ie_p->ie_len);
 550
 551                 switch (ie_p->ie_id) {
 552
 553                 case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */
 554                 case FR_LMI_CCITT_REPORT_TYPE_IE:
 555                     if (vflag)
 556                         printf("%s (%u)",
 557                                tok2str(fr_lmi_report_type_ie_values,"unknown",ptemp[2]),
 558                                ptemp[2]);
 559                     break;
 560
 561                 case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */
 562                 case FR_LMI_CCITT_LINK_VERIFY_IE:
 563                 case FR_LMI_ANSI_LINK_VERIFY_IE_91:
 564                     if (!vflag)
 565                         printf(", ");
 566                     printf("TX Seq: %3d, RX Seq: %3d", ptemp[2], ptemp[3]);
 567                     break;
 568                 case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */
 569                 case FR_LMI_CCITT_PVC_STATUS_IE:
 570                     if (!vflag)
 571                         printf(", ");
 572                     /* now parse the DLCI information element. */
 573                     if ((ie_p->ie_len < 3) ||
 574                         (ptemp[2] & 0x80) ||
 575                         ((ie_p->ie_len == 3) && !(ptemp[3] & 0x80)) ||
 576                         ((ie_p->ie_len == 4) && ((ptemp[3] & 0x80) || !(ptemp[4] & 0x80))) ||
 577                         ((ie_p->ie_len == 5) && ((ptemp[3] & 0x80) || (ptemp[4] & 0x80) ||
 578                                            !(ptemp[5] & 0x80))) ||
 579                         (ie_p->ie_len > 5) ||
 580                         !(ptemp[ie_p->ie_len + 1] & 0x80))
 581                         printf("Invalid DLCI IE");
 582
 583                     dlci = ((ptemp[2] & 0x3F) << 4) | ((ptemp[3] & 0x78) >> 3);
 584                     if (ie_p->ie_len == 4)
 585                         dlci = (dlci << 6) | ((ptemp[4] & 0x7E) >> 1);
 586                     else if (ie_p->ie_len == 5)
 587                         dlci = (dlci << 13) | (ptemp[4] & 0x7F) | ((ptemp[5] & 0x7E) >> 1);
 588
 589                     printf("DLCI %u: status %s%s", dlci,
 590                              ptemp[ie_p->ie_len + 1] & 0x8 ? "New, " : "",
 591                              ptemp[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive");
 592                     break;
 593
 594                 default:
 595                     if (vflag <= 1)
 596                         print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len);
 597                     break;
 598                 }
 599
 600                 /* do we want to see a hexdump of the IE ? */
 601                 if (vflag> 1)
 602                     print_unknown_data(ptemp+2,"\n\t  ",ie_p->ie_len);
 603
 604                 length = length - ie_p->ie_len - 2;
 605                 ptemp = ptemp + ie_p->ie_len + 2;
 606         }
 607         if (!vflag)
 608             printf(", length %u",olen);
 609 }