packet-wtp.c

   1 /* packet-wtp.c (c) 2000 Neil Hunter
   2  * Base on original work by Ben Fowler
   3  *
   4  * Routines to dissect WTP component of WAP traffic.
   5  *
   6  * $Id: packet-wtp.c,v 1.8 2001/01/03 16:41:08 gram Exp $
   7  *
   8  * Ethereal - Network traffic analyzer
   9  * By Gerald Combs <gerald@zing.org>
  10  * Copyright 1998 Didier Jorand
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33
  34 #ifdef HAVE_SYS_TYPES_H
  35 # include <sys/types.h>
  36 #endif
  37
  38 #ifdef HAVE_NETINET_IN_H
  39 # include <netinet/in.h>
  40 #endif
  41
  42 #ifdef NEED_SNPRINTF_H
  43 # ifdef HAVE_STDARG_H
  44 #  include <stdarg.h>
  45 # else
  46 #  include <varargs.h>
  47 # endif
  48 # include "snprintf.h"
  49 #endif
  50
  51 #include <string.h>
  52 #include <glib.h>
  53 #include "packet.h"
  54 #include "packet-wap.h"
  55 #include "packet-wtp.h"
  56 #include "packet-wsp.h"
  57
  58 static const true_false_string continue_truth = {
  59         "TPI Present" ,
  60         "No TPI"
  61 };
  62
  63 static const true_false_string RID_truth = {
  64         "Re-Transmission",
  65         "First transmission"
  66 };
  67
  68 static const true_false_string TIDNew_truth = {
  69         "TID is new" ,
  70         "TID is valid"
  71 };
  72
  73 static const true_false_string tid_response_truth = {
  74         "Response" ,
  75         "Original"
  76 };
  77
  78 static const true_false_string UP_truth = {
  79         "User Acknowledgement required" ,
  80         "User Acknowledgement optional"
  81 };
  82
  83 static const true_false_string TVETOK_truth = {
  84         "True",
  85         "False"
  86 };
  87
  88 static const value_string vals_pdu_type[] = {
  89         { 0, "Not Allowed" },
  90         { 1, "Invoke" },
  91         { 2, "Result" },
  92         { 3, "Ack" },
  93         { 4, "Abort" },
  94         { 5, "Segmented Invoke" },
  95         { 6, "Segmented Result" },
  96         { 7, "Negative Ack" },
  97         { 0, NULL }
  98 };
  99
 100 static const value_string vals_transmission_trailer[] = {
 101         { 0, "Not last packet" },
 102         { 1, "Last packet of message" },
 103         { 2, "Last packet of group" },
 104         { 3, "Re-assembly not supported" },
 105         { 0, NULL }
 106 };
 107
 108 static const value_string vals_version[] = {
 109         { 0, "Current" },
 110         { 1, "Undefined" },
 111         { 2, "Undefined" },
 112         { 3, "Undefined" },
 113         { 0, NULL }
 114 };
 115
 116 static const value_string vals_abort_type[] = {
 117         { 0, "Provider" },
 118         { 1, "User (WSP)" },
 119         { 0, NULL }
 120 };
 121
 122 static const value_string vals_abort_reason_provider[] = {
 123         { 0x00, "Unknown" },
 124         { 0x01, "Protocol Error" },
 125         { 0x02, "Invalid TID" },
 126         { 0x03, "Not Implemented Class 2" },
 127         { 0x04, "Not Implemented SAR" },
 128         { 0x05, "Not Implemented User Acknowledgement" },
 129         { 0x06, "WTP Version Zero" },
 130         { 0x07, "Capacity Temporarily Exceeded" },
 131         { 0x08, "No Response" },
 132         { 0x09, "Message Too Large" },
 133         { 0x00, NULL }
 134 };
 135
 136 /* File scoped variables for the protocol and registered fields */
 137 static int proto_wtp                                                    = HF_EMPTY;
 138
 139 /* These fields used by fixed part of header */
 140 static int hf_wtp_header_fixed_part                     = HF_EMPTY;
 141 static int hf_wtp_header_flag_continue                  = HF_EMPTY;
 142 static int hf_wtp_header_pdu_type                               = HF_EMPTY;
 143 static int hf_wtp_header_flag_Trailer                   = HF_EMPTY;
 144 static int hf_wtp_header_flag_RID                               = HF_EMPTY;
 145 static int hf_wtp_header_flag_TID                               = HF_EMPTY;
 146 static int hf_wtp_header_flag_TID_response              = HF_EMPTY;
 147
 148 /* These fields used by Invoke packets */
 149 static int hf_wtp_header_Inv_version                    = HF_EMPTY;
 150 static int hf_wtp_header_Inv_flag_TIDNew                = HF_EMPTY;
 151 static int hf_wtp_header_Inv_flag_UP                    = HF_EMPTY;
 152 static int hf_wtp_header_Inv_Reserved                   = HF_EMPTY;
 153 static int hf_wtp_header_Inv_TransactionClass   = HF_EMPTY;
 154
 155
 156 static int hf_wtp_header_variable_part                  = HF_EMPTY;
 157 static int hf_wtp_data                                                  = HF_EMPTY;
 158
 159 static int hf_wtp_header_Ack_flag_TVETOK                = HF_EMPTY;
 160 static int hf_wtp_header_Abort_type                             = HF_EMPTY;
 161 static int hf_wtp_header_Abort_reason_provider  = HF_EMPTY;
 162 static int hf_wtp_header_Abort_reason_user              = HF_EMPTY;
 163 static int hf_wtp_header_sequence_number                = HF_EMPTY;
 164 static int hf_wtp_header_missing_packets                = HF_EMPTY;
 165
 166 /* Initialize the subtree pointers */
 167 static gint ett_wtp                                                     = ETT_EMPTY;
 168 static gint ett_header                                                  = ETT_EMPTY;
 169
 170 static dissector_handle_t wsp_handle;
 171
 172 /* Declarations */
 173 static char transaction_class(unsigned char octet);
 174 static char pdu_type(unsigned char octet);
 175 static char retransmission_indicator(unsigned char octet);
 176
 177 /* Code to actually dissect the packets */
 178 static void
 179 dissect_wtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 180 {
 181         frame_data *fdata = pinfo->fd;
 182
 183         char szInfo[ 50 ];
 184         int offCur                      = 0; /* current offset from start of WTP data */
 185
 186         /* bytes at offset 0 - 3 */
 187         /*
 188         unsigned char  b0 = pd[offset + 0];
 189         unsigned char  b3 = pd[offset + 3];
 190         */
 191         unsigned char  b0 = tvb_get_guint8 (tvb, offCur + 0);
 192
 193         /* continuation flag */
 194         unsigned char   fCon            = b0 & 0x80;
 195         unsigned char   fRID            = retransmission_indicator( b0 );
 196         int             cbHeader        = 0;
 197         int             abortType       = 0;
 198
 199 /* Set up structures we will need to add the protocol subtree and manage it */
 200         proto_item *ti;
 201         proto_tree *wtp_tree;
 202         proto_tree *wtp_header_fixed;
 203
 204         char pdut                       = pdu_type( b0 );
 205         char clsTransaction             = ' ';
 206         int cchInfo;
 207         int numMissing = 0;             /* Number of missing packets in a negative ack */
 208         int i;
 209         tvbuff_t *wsp_tvb = NULL;
 210
 211         CHECK_DISPLAY_AS_DATA(proto_wtp, tvb, pinfo, tree);
 212
 213         pinfo->current_proto = "WTP";
 214
 215 /* Make entries in Protocol column and Info column of summary display */
 216
 217 #ifdef DEBUG
 218         fprintf( stderr, "dissect_wtp: (Entering) Frame data at %p\n", fdata );
 219         fprintf( stderr, "dissect_wtp: tvb length is %d\n", tvb_reported_length( tvb ) );
 220 #endif
 221         /* Display protocol type depending on the port */
 222         if (check_col(fdata, COL_PROTOCOL))
 223         {
 224                 switch ( pinfo->match_port )
 225                 {
 226                         case UDP_PORT_WTP_WSP:
 227                                 col_add_fstr(fdata, COL_PROTOCOL, "WTP+WSP" );
 228                                 break;
 229                         case UDP_PORT_WTLS_WTP_WSP:
 230                                 col_add_fstr(fdata, COL_PROTOCOL, "WTLS+WTP+WSP" );
 231                                 break;
 232                         default:
 233                                 break;
 234                 }
 235         }
 236
 237         /* Develop the string to put in the Info column */
 238         cchInfo = snprintf( szInfo, sizeof( szInfo ), "WTP %s", vals_pdu_type[ ( int )pdut ].strptr  );
 239
 240         switch( pdut ) {
 241                 case INVOKE:
 242                         clsTransaction = transaction_class( tvb_get_guint8 (tvb, offCur + 3) );
 243                         snprintf( szInfo + cchInfo, sizeof( szInfo ) - cchInfo, " Class %d", clsTransaction  );
 244
 245                 case ABORT:
 246                 case SEGMENTED_INVOKE:
 247                 case SEGMENTED_RESULT:
 248                         cbHeader = 4;
 249                         break;
 250
 251                 case RESULT:
 252                 case ACK:
 253                         cbHeader = 3;
 254                         break;
 255
 256                 case NEGATIVE_ACK:
 257                         /* Varible number of missing packets */
 258                         numMissing = tvb_get_guint8 (tvb, offCur + 3);
 259                         cbHeader = numMissing + 4;
 260                         break;
 261
 262                 default:
 263                         break;
 264         };
 265
 266         if( fRID ) {
 267                 strcat( szInfo, " R" );
 268         };
 269
 270 #ifdef DEBUG
 271         fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
 272 #endif
 273
 274 /* This field shows up as the "Info" column in the display; you should make
 275    it, if possible, summarize what's in the packet, so that a user looking
 276    at the list of packets can tell what type of packet it is. */
 277         if (check_col(fdata, COL_INFO)) {
 278 #ifdef DEBUG
 279                 fprintf( stderr, "dissect_wtp: (6) About to set info_col header to %s\n", szInfo );
 280 #endif
 281                 col_add_str(fdata, COL_INFO, szInfo );
 282         };
 283 /* In the interest of speed, if "tree" is NULL, don't do any work not
 284    necessary to generate protocol tree items. */
 285         if (tree) {
 286 #ifdef DEBUG
 287                 fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
 288 #endif
 289                 ti = proto_tree_add_item(tree, proto_wtp, tvb, offCur, cbHeader, bo_little_endian);
 290 #ifdef DEBUG
 291                 fprintf( stderr, "dissect_wtp: (7) Returned from proto_tree_add_item\n" );
 292 #endif
 293                 wtp_tree = proto_item_add_subtree(ti, ett_wtp);
 294
 295 /* Code to process the packet goes here */
 296                 {
 297 #ifdef DEBUG
 298                         fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
 299                         fprintf( stderr, "dissect_wtp: offCur = %d\n", offCur );
 300                         fprintf( stderr, "dissect_wtp: About to call proto_tree_add_item with %p %d %p %d %d %d\n",
 301                                         wtp_tree, hf_wtp_header_fixed_part, tvb, offCur, cbHeader, bo_little_endian );
 302                         ti = proto_tree_add_item( wtp_tree, hf_wtp_header_fixed_part, tvb, offCur, cbHeader, bo_little_endian );
 303                         fprintf( stderr, "dissect_wtp: (6) Returned from proto_tree_add_item\n" );
 304 #endif
 305                         wtp_header_fixed = proto_item_add_subtree(
 306                                         ti,
 307                                         ett_header
 308                                 );
 309
 310                         /* Add common items: only CON and PDU Type */
 311                         ti = proto_tree_add_item(
 312                                         wtp_header_fixed,               /* tree */
 313                                         hf_wtp_header_flag_continue,    /* id */
 314                                         tvb,
 315                                         offCur,                         /* start of high light */
 316                                         1,                              /* length of high light */
 317                                         b0                              /* value */
 318                              );
 319                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_pdu_type, tvb, offCur, 1, bo_little_endian );
 320
 321                         switch( pdut ) {
 322                                 case INVOKE:
 323                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
 324                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 325                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 326                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 327
 328                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_version , tvb, offCur + 3, 1, bo_little_endian );
 329                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_flag_TIDNew, tvb, offCur + 3, 1, bo_little_endian );
 330                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_flag_UP, tvb, offCur + 3, 1, bo_little_endian );
 331                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_Reserved, tvb, offCur + 3, 1, bo_little_endian );
 332                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_TransactionClass, tvb, offCur + 3, 1, bo_little_endian );
 333                                         break;
 334
 335                                 case RESULT:
 336                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
 337                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 338                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 339                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 340                                         break;
 341
 342                                 case ACK:
 343                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Ack_flag_TVETOK, tvb, offCur, 1, bo_big_endian );
 344
 345                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 346                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 347                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 348                                         break;
 349
 350                                 case ABORT:
 351                                         abortType = tvb_get_guint8 (tvb, offCur) & 0x07;
 352                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Abort_type , tvb, offCur , 1, bo_little_endian );
 353                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 354                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 355
 356                                         if (abortType == PROVIDER)
 357                                         {
 358                                                 ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Abort_reason_provider , tvb, offCur + 3 , 1, bo_little_endian );
 359                                         }
 360                                         else if (abortType == USER)
 361                                         {
 362                                                 ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Abort_reason_user , tvb, offCur + 3 , 1, bo_little_endian );
 363                                         }
 364                                         break;
 365
 366                                 case SEGMENTED_INVOKE:
 367                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
 368                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 369                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 370                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 371
 372                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_sequence_number , tvb, offCur + 3, 1, bo_little_endian );
 373                                         break;
 374
 375                                 case SEGMENTED_RESULT:
 376                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
 377                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 378                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 379                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 380
 381                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_sequence_number , tvb, offCur + 3, 1, bo_little_endian );
 382                                         break;
 383
 384                                 case NEGATIVE_ACK:
 385                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 386                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 387                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 388
 389                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_missing_packets , tvb, offCur + 3, 1, bo_little_endian );
 390                                         /* Iterate through missing packets */
 391                                         for (i=0; i<numMissing; i++)
 392                                         {
 393                                                 ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_sequence_number , tvb, offCur + i, 1, bo_little_endian );
 394                                         }
 395                                         break;
 396
 397                                 default:
 398                                         break;
 399                         };
 400
 401                         if( fCon ) {
 402                                 /* There is a variable part if the Con flag is set */
 403                                 ti = proto_tree_add_bytes_format(
 404                                                 wtp_tree,                       /* tree */
 405                                                 hf_wtp_header_variable_part,    /* id */
 406                                                 tvb,
 407                                                 offCur + 4,                     /* start */
 408                                                 4,                              /* length */
 409                                                 "What should go here!",         /* value */
 410                                                 "Header (Variable part) %02X %02X %02X %02X"  ,                 /* format */
 411                                                 0, 1, 2, 3
 412                                     );
 413                         } else {
 414                                 /* There is no variable part */
 415                         }; /* End of variable part of header */
 416                 }
 417         } else {
 418 #ifdef DEBUG
 419                 fprintf( stderr, "dissect_wtp: (4) tree was %p\n", tree );
 420 #endif
 421         }
 422
 423         /* Any remaining data ought to be WSP data, so hand off to the WSP dissector */
 424         if (tvb_reported_length (tvb) > cbHeader)
 425         {
 426                 wsp_tvb = tvb_new_subset(tvb, cbHeader, -1, tvb_reported_length (tvb)-cbHeader);
 427                 call_dissector(wsp_handle, wsp_tvb, pinfo, tree);
 428         }
 429
 430 #ifdef DEBUG
 431         fprintf( stderr, "dissect_wtp: (leaving) fdata->cinfo is %p\n", fdata->cinfo );
 432 #endif
 433 }
 434
 435 static char pdu_type(unsigned char octet)
 436 {
 437         char ch = (octet >> 3) & 0x0F;
 438         /* Note pdu type must not be 0x00 */
 439         return ch;
 440 };
 441
 442 static char transaction_class(unsigned char octet)
 443 {
 444         char ch = (octet >> 0) & 0x03; /* ......XX */
 445         return ch;
 446 };
 447
 448 static char retransmission_indicator(unsigned char octet)
 449 {
 450         char ch = (octet >> 0) & 0x01; /* ......,X */
 451         return ch;
 452 };
 453
 454 /* Register the protocol with Ethereal */
 455 void
 456 proto_register_wtp(void)
 457 {
 458
 459 /* Setup list of header fields */
 460         static hf_register_info hf[] = {
 461                 { &hf_wtp_header_fixed_part,
 462                         {       "Header",
 463                                 "wtp.header_fixed_part",
 464                                 FT_BYTES, BASE_HEX, NULL, 0x0,
 465                                 "Fixed part of the header"
 466                         }
 467                 },
 468                 { &hf_wtp_header_flag_continue,
 469                         {       "Continue Flag",
 470                                 "wtp.continue-flag",
 471                                 FT_BOOLEAN, 8, TFS( &continue_truth ), 0x80,
 472                                 "Continue Flag"
 473                         }
 474                 },
 475                 { &hf_wtp_header_pdu_type,
 476                         {       "PDU Type",
 477                                 "wtp.pdu-type",
 478                                  FT_UINT8, BASE_HEX, VALS( vals_pdu_type ), 0x78,
 479                                 "PDU Type"
 480                         }
 481                 },
 482                 { &hf_wtp_header_flag_Trailer,
 483                         {       "Trailer Flags",
 484                                 "wtp.trailer-flags",
 485                                  FT_UINT8, BASE_HEX, VALS( vals_transmission_trailer ), 0x06,
 486                                 "PDU Type"
 487                         }
 488                 },
 489                 { &hf_wtp_header_flag_RID,
 490                         {       "Re-transmission Indicator",
 491                                 "wtp.RID",
 492                                  FT_BOOLEAN, 8, TFS( &RID_truth ), 0x01,
 493                                 "Re-transmission Indicator"
 494                         }
 495                 },
 496                 { &hf_wtp_header_flag_TID_response,
 497                         {       "TID Response",
 498                                 "wtp.TID.response",
 499                                 FT_BOOLEAN, 16, TFS( &tid_response_truth ), 0x8000,
 500                                 "TID Response"
 501                         }
 502                 },
 503                 { &hf_wtp_header_flag_TID,
 504                         {       "Transmission ID",
 505                                 "wtp.TID",
 506                                  FT_UINT16, BASE_HEX, NULL, 0x7FFF,
 507                                 "Transmission ID"
 508                         }
 509                 },
 510                 { &hf_wtp_header_Inv_version,
 511                         {       "Version",
 512                                 "wtp.header.version",
 513                                  FT_UINT8, BASE_HEX, VALS( vals_version ), 0xC0,
 514                                 "Version"
 515                         }
 516                 },
 517                 { &hf_wtp_header_Inv_flag_TIDNew,
 518                         {       "TIDNew",
 519                                 "wtp.header.TIDNew",
 520                                  FT_BOOLEAN, 8, TFS( &TIDNew_truth ), 0x20,
 521                                 "TIDNew"
 522                         }
 523                 },
 524                 { &hf_wtp_header_Inv_flag_UP,
 525                         {       "U/P flag",
 526                                 "wtp.header.UP",
 527                                  FT_BOOLEAN, 8, TFS( &UP_truth ), 0x10,
 528                                 "U/P Flag"
 529                         }
 530                 },
 531                 { &hf_wtp_header_Inv_Reserved,
 532                         {       "Reserved",
 533                                 "wtp.inv.reserved",
 534                                  FT_UINT8, BASE_HEX, NULL, 0x0C,
 535                                 "Reserved"
 536                         }
 537                 },
 538                 { &hf_wtp_header_Inv_TransactionClass,
 539                         {       "Transaction Class",
 540                                 "wtp.inv.transaction-class",
 541                                  FT_UINT8, BASE_HEX, NULL, 0x03,
 542                                 "Transaction Class"
 543                         }
 544                 },
 545                 { &hf_wtp_header_Ack_flag_TVETOK,
 546                         {       "Tve/Tok flag",
 547                                 "wtp.ack.tvetok",
 548                                  FT_BOOLEAN, 8, TFS( &TVETOK_truth ), 0x04,
 549                                 "Tve/Tok flag"
 550                         }
 551                 },
 552                 { &hf_wtp_header_Abort_type,
 553                         {       "Abort Type",
 554                                 "wtp.abort.type",
 555                                  FT_UINT8, BASE_HEX, VALS ( vals_abort_type ), 0x07,
 556                                 "Abort Type"
 557                         }
 558                 },
 559                 { &hf_wtp_header_Abort_reason_provider,
 560                         {       "Abort Reason",
 561                                 "wtp.abort.reason.provider",
 562                                  FT_UINT8, BASE_HEX, VALS ( vals_abort_reason_provider ), 0x00,
 563                                 "Abort Reason"
 564                         }
 565                 },
 566                 /* Assume WSP is the user and use its reason codes */
 567                 { &hf_wtp_header_Abort_reason_user,
 568                         {       "Abort Reason",
 569                                 "wtp.abort.reason.user",
 570                                  FT_UINT8, BASE_HEX, VALS ( vals_wsp_reason_codes ), 0x00,
 571                                 "Abort Reason"
 572                         }
 573                 },
 574                 { &hf_wtp_header_sequence_number,
 575                         {       "Packet Sequence Number",
 576                                 "wtp.header.sequence",
 577                                  FT_UINT8, BASE_HEX, NULL, 0x00,
 578                                 "Packet Sequence Number"
 579                         }
 580                 },
 581                 { &hf_wtp_header_missing_packets,
 582                         {       "Missing Packets",
 583                                 "wtp.header.missing_packets",
 584                                  FT_UINT8, BASE_HEX, NULL, 0x00,
 585                                 "Missing Packets"
 586                         }
 587                 },
 588                 { &hf_wtp_header_variable_part,
 589                         {       "Header: Variable part",
 590                                 "wtp.header_variable_part",
 591                                 FT_BYTES, BASE_HEX, NULL, 0x0,
 592                                 "Variable part of the header"
 593                         }
 594                 },
 595                 { &hf_wtp_data,
 596                         {       "Data",
 597                                 "wtp.header_data",
 598                                 FT_BYTES, BASE_HEX, NULL, 0x0,
 599                                 "Data"
 600                         }
 601                 },
 602         };
 603
 604 /* Setup protocol subtree array */
 605         static gint *ett[] = {
 606                 &ett_wtp,
 607                 &ett_header,
 608         };
 609
 610 /* Register the protocol name and description */
 611         proto_wtp = proto_register_protocol(
 612                 "Wireless Transaction Protocol",   /* protocol name for use by ethereal */
 613                 "WTP",                             /* short version of name */
 614                 "wap-wsp-wtp"                    /* Abbreviated protocol name, should Match IANA
 615                                                     < URL:http://www.isi.edu/in-notes/iana/assignments/port-numbers/ >
 616                                                   */
 617         );
 618
 619 /* Required function calls to register the header fields and subtrees used */
 620         proto_register_field_array(proto_wtp, hf, array_length(hf));
 621         proto_register_subtree_array(ett, array_length(ett));
 622 };
 623
 624 void
 625 proto_reg_handoff_wtp(void)
 626 {
 627         /*
 628          * Get a handle for the IP WSP dissector.
 629          */
 630         wsp_handle = find_dissector("wsp");
 631
 632         dissector_add("udp.port", UDP_PORT_WTP_WSP, dissect_wtp);
 633         /* dissector_add("udp.port", UDP_PORT_WTLS_WTP_WSP, dissect_wsp); */
 634 }