packet-wtp.c

   1 /* packet-wtp.c
   2  *
   3  * Routines to dissect WTP component of WAP traffic.
   4  *
   5  * $Id: packet-wtp.c,v 1.14 2001/06/18 02:17:54 guy Exp $
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@zing.org>
   9  * Copyright 1998 Didier Jorand
  10  *
  11  * WAP dissector based on original work by Ben Fowler
  12  * Updated by Neil Hunter <neil.hunter@energis-squared.com>
  13  * WTLS support by Alexandre P. Ferreira (Splice IP)
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36
  37 #ifdef HAVE_SYS_TYPES_H
  38 # include <sys/types.h>
  39 #endif
  40
  41 #ifdef HAVE_NETINET_IN_H
  42 # include <netinet/in.h>
  43 #endif
  44
  45 #ifdef NEED_SNPRINTF_H
  46 # ifdef HAVE_STDARG_H
  47 #  include <stdarg.h>
  48 # else
  49 #  include <varargs.h>
  50 # endif
  51 # include "snprintf.h"
  52 #endif
  53
  54 #include <string.h>
  55 #include <glib.h>
  56 #include "packet.h"
  57 #include "packet-wap.h"
  58 #include "packet-wtp.h"
  59 #include "packet-wsp.h"
  60
  61 static const true_false_string continue_truth = {
  62         "TPI Present" ,
  63         "No TPI"
  64 };
  65
  66 static const true_false_string RID_truth = {
  67         "Re-Transmission",
  68         "First transmission"
  69 };
  70
  71 static const true_false_string TIDNew_truth = {
  72         "TID is new" ,
  73         "TID is valid"
  74 };
  75
  76 static const true_false_string tid_response_truth = {
  77         "Response" ,
  78         "Original"
  79 };
  80
  81 static const true_false_string UP_truth = {
  82         "User Acknowledgement required" ,
  83         "User Acknowledgement optional"
  84 };
  85
  86 static const true_false_string TVETOK_truth = {
  87         "True",
  88         "False"
  89 };
  90
  91 static const value_string vals_pdu_type[] = {
  92         { 0, "Not Allowed" },
  93         { 1, "Invoke" },
  94         { 2, "Result" },
  95         { 3, "Ack" },
  96         { 4, "Abort" },
  97         { 5, "Segmented Invoke" },
  98         { 6, "Segmented Result" },
  99         { 7, "Negative Ack" },
 100         { 0, NULL }
 101 };
 102
 103 static const value_string vals_transmission_trailer[] = {
 104         { 0, "Not last packet" },
 105         { 1, "Last packet of message" },
 106         { 2, "Last packet of group" },
 107         { 3, "Re-assembly not supported" },
 108         { 0, NULL }
 109 };
 110
 111 static const value_string vals_version[] = {
 112         { 0, "Current" },
 113         { 1, "Undefined" },
 114         { 2, "Undefined" },
 115         { 3, "Undefined" },
 116         { 0, NULL }
 117 };
 118
 119 static const value_string vals_abort_type[] = {
 120         { 0, "Provider" },
 121         { 1, "User (WSP)" },
 122         { 0, NULL }
 123 };
 124
 125 static const value_string vals_abort_reason_provider[] = {
 126         { 0x00, "Unknown" },
 127         { 0x01, "Protocol Error" },
 128         { 0x02, "Invalid TID" },
 129         { 0x03, "Not Implemented Class 2" },
 130         { 0x04, "Not Implemented SAR" },
 131         { 0x05, "Not Implemented User Acknowledgement" },
 132         { 0x06, "WTP Version Zero" },
 133         { 0x07, "Capacity Temporarily Exceeded" },
 134         { 0x08, "No Response" },
 135         { 0x09, "Message Too Large" },
 136         { 0x00, NULL }
 137 };
 138
 139 /* File scoped variables for the protocol and registered fields */
 140 static int proto_wtp                                                    = HF_EMPTY;
 141
 142 /* These fields used by fixed part of header */
 143 static int hf_wtp_header_fixed_part                     = HF_EMPTY;
 144 static int hf_wtp_header_flag_continue                  = HF_EMPTY;
 145 static int hf_wtp_header_pdu_type                               = HF_EMPTY;
 146 static int hf_wtp_header_flag_Trailer                   = HF_EMPTY;
 147 static int hf_wtp_header_flag_RID                               = HF_EMPTY;
 148 static int hf_wtp_header_flag_TID                               = HF_EMPTY;
 149 static int hf_wtp_header_flag_TID_response              = HF_EMPTY;
 150
 151 /* These fields used by Invoke packets */
 152 static int hf_wtp_header_Inv_version                    = HF_EMPTY;
 153 static int hf_wtp_header_Inv_flag_TIDNew                = HF_EMPTY;
 154 static int hf_wtp_header_Inv_flag_UP                    = HF_EMPTY;
 155 static int hf_wtp_header_Inv_Reserved                   = HF_EMPTY;
 156 static int hf_wtp_header_Inv_TransactionClass   = HF_EMPTY;
 157
 158
 159 static int hf_wtp_header_variable_part                  = HF_EMPTY;
 160 static int hf_wtp_data                                                  = HF_EMPTY;
 161
 162 static int hf_wtp_header_Ack_flag_TVETOK                = HF_EMPTY;
 163 static int hf_wtp_header_Abort_type                             = HF_EMPTY;
 164 static int hf_wtp_header_Abort_reason_provider  = HF_EMPTY;
 165 static int hf_wtp_header_Abort_reason_user              = HF_EMPTY;
 166 static int hf_wtp_header_sequence_number                = HF_EMPTY;
 167 static int hf_wtp_header_missing_packets                = HF_EMPTY;
 168
 169 /* Initialize the subtree pointers */
 170 static gint ett_wtp                                                     = ETT_EMPTY;
 171 static gint ett_header                                                  = ETT_EMPTY;
 172
 173 /* Handle for WSP dissector */
 174 static dissector_handle_t wsp_handle;
 175
 176 /* Declarations */
 177 static char transaction_class(unsigned char octet);
 178 static char pdu_type(unsigned char octet);
 179 static char retransmission_indicator(unsigned char octet);
 180
 181 /* Code to actually dissect the packets */
 182 static void
 183 dissect_wtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 184 {
 185         frame_data *fdata = pinfo->fd;
 186
 187         char szInfo[ 50 ];
 188         int offCur                      = 0; /* current offset from start of WTP data */
 189
 190         /* bytes at offset 0 - 3 */
 191         /*
 192         unsigned char  b0 = pd[offset + 0];
 193         unsigned char  b3 = pd[offset + 3];
 194         */
 195         unsigned char  b0;
 196
 197         /* continuation flag */
 198         unsigned char   fCon;
 199         unsigned char   fRID;
 200         int             cbHeader        = 0;
 201         int             abortType       = 0;
 202
 203 /* Set up structures we will need to add the protocol subtree and manage it */
 204         proto_item *ti;
 205         proto_tree *wtp_tree;
 206         proto_tree *wtp_header_fixed;
 207
 208         char pdut;
 209         char clsTransaction             = ' ';
 210         int cchInfo;
 211         int numMissing = 0;             /* Number of missing packets in a negative ack */
 212         int i;
 213         tvbuff_t *wsp_tvb = NULL;
 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         if (check_col(fdata, COL_INFO)) {
 237                 col_clear(fdata, COL_INFO);
 238         };
 239
 240         b0 = tvb_get_guint8 (tvb, offCur + 0);
 241         fCon = b0 & 0x80;
 242         fRID = retransmission_indicator( b0 );
 243         pdut = pdu_type( b0 );
 244
 245         /* Develop the string to put in the Info column */
 246         cchInfo = snprintf( szInfo, sizeof( szInfo ), "WTP %s",
 247             val_to_str(pdut, vals_pdu_type, "Unknown PDU type 0x%x"));
 248
 249         switch( pdut ) {
 250                 case INVOKE:
 251                         clsTransaction = transaction_class( tvb_get_guint8 (tvb, offCur + 3) );
 252                         snprintf( szInfo + cchInfo, sizeof( szInfo ) - cchInfo, " Class %d", clsTransaction  );
 253
 254                 case ABORT:
 255                 case SEGMENTED_INVOKE:
 256                 case SEGMENTED_RESULT:
 257                         cbHeader = 4;
 258                         break;
 259
 260                 case RESULT:
 261                 case ACK:
 262                         cbHeader = 3;
 263                         break;
 264
 265                 case NEGATIVE_ACK:
 266                         /* Varible number of missing packets */
 267                         numMissing = tvb_get_guint8 (tvb, offCur + 3);
 268                         cbHeader = numMissing + 4;
 269                         break;
 270
 271                 default:
 272                         break;
 273         };
 274
 275         if( fRID ) {
 276                 strcat( szInfo, " R" );
 277         };
 278
 279 #ifdef DEBUG
 280         fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
 281 #endif
 282
 283 /* This field shows up as the "Info" column in the display; you should make
 284    it, if possible, summarize what's in the packet, so that a user looking
 285    at the list of packets can tell what type of packet it is. */
 286         if (check_col(fdata, COL_INFO)) {
 287 #ifdef DEBUG
 288                 fprintf( stderr, "dissect_wtp: (6) About to set info_col header to %s\n", szInfo );
 289 #endif
 290                 col_add_str(fdata, COL_INFO, szInfo );
 291         };
 292 /* In the interest of speed, if "tree" is NULL, don't do any work not
 293    necessary to generate protocol tree items. */
 294         if (tree) {
 295 #ifdef DEBUG
 296                 fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
 297 #endif
 298                 ti = proto_tree_add_item(tree, proto_wtp, tvb, offCur, cbHeader, bo_little_endian);
 299 #ifdef DEBUG
 300                 fprintf( stderr, "dissect_wtp: (7) Returned from proto_tree_add_item\n" );
 301 #endif
 302                 wtp_tree = proto_item_add_subtree(ti, ett_wtp);
 303
 304 /* Code to process the packet goes here */
 305                 {
 306 #ifdef DEBUG
 307                         fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
 308                         fprintf( stderr, "dissect_wtp: offCur = %d\n", offCur );
 309                         fprintf( stderr, "dissect_wtp: About to call proto_tree_add_item with %p %d %p %d %d %d\n",
 310                                         wtp_tree, hf_wtp_header_fixed_part, tvb, offCur, cbHeader, bo_little_endian );
 311                         ti = proto_tree_add_item( wtp_tree, hf_wtp_header_fixed_part, tvb, offCur, cbHeader, bo_little_endian );
 312                         fprintf( stderr, "dissect_wtp: (6) Returned from proto_tree_add_item\n" );
 313 #endif
 314                         wtp_header_fixed = proto_item_add_subtree(
 315                                         ti,
 316                                         ett_header
 317                                 );
 318
 319                         /* Add common items: only CON and PDU Type */
 320                         ti = proto_tree_add_item(
 321                                         wtp_header_fixed,               /* tree */
 322                                         hf_wtp_header_flag_continue,    /* id */
 323                                         tvb,
 324                                         offCur,                         /* start of high light */
 325                                         1,                              /* length of high light */
 326                                         b0                              /* value */
 327                              );
 328                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_pdu_type, tvb, offCur, 1, bo_little_endian );
 329
 330                         switch( pdut ) {
 331                                 case INVOKE:
 332                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
 333                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 334                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 335                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 336
 337                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_version , tvb, offCur + 3, 1, bo_little_endian );
 338                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_flag_TIDNew, tvb, offCur + 3, 1, bo_little_endian );
 339                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_flag_UP, tvb, offCur + 3, 1, bo_little_endian );
 340                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_Reserved, tvb, offCur + 3, 1, bo_little_endian );
 341                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Inv_TransactionClass, tvb, offCur + 3, 1, bo_little_endian );
 342                                         break;
 343
 344                                 case RESULT:
 345                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
 346                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 347                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 348                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 349                                         break;
 350
 351                                 case ACK:
 352                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Ack_flag_TVETOK, tvb, offCur, 1, bo_big_endian );
 353
 354                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 355                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 356                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 357                                         break;
 358
 359                                 case ABORT:
 360                                         abortType = tvb_get_guint8 (tvb, offCur) & 0x07;
 361                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Abort_type , tvb, offCur , 1, bo_little_endian );
 362                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 363                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 364
 365                                         if (abortType == PROVIDER)
 366                                         {
 367                                                 ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Abort_reason_provider , tvb, offCur + 3 , 1, bo_little_endian );
 368                                         }
 369                                         else if (abortType == USER)
 370                                         {
 371                                                 ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_Abort_reason_user , tvb, offCur + 3 , 1, bo_little_endian );
 372                                         }
 373                                         break;
 374
 375                                 case SEGMENTED_INVOKE:
 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 SEGMENTED_RESULT:
 385                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
 386                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 387                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 388                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 389
 390                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_sequence_number , tvb, offCur + 3, 1, bo_little_endian );
 391                                         break;
 392
 393                                 case NEGATIVE_ACK:
 394                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
 395                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
 396                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
 397
 398                                         ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_missing_packets , tvb, offCur + 3, 1, bo_little_endian );
 399                                         /* Iterate through missing packets */
 400                                         for (i=0; i<numMissing; i++)
 401                                         {
 402                                                 ti = proto_tree_add_item( wtp_header_fixed, hf_wtp_header_sequence_number , tvb, offCur + i, 1, bo_little_endian );
 403                                         }
 404                                         break;
 405
 406                                 default:
 407                                         break;
 408                         };
 409
 410                         if( fCon ) {
 411                                 /* There is a variable part if the Con flag is set */
 412                                 ti = proto_tree_add_bytes_format(
 413                                                 wtp_tree,                       /* tree */
 414                                                 hf_wtp_header_variable_part,    /* id */
 415                                                 tvb,
 416                                                 offCur + 4,                     /* start */
 417                                                 4,                              /* length */
 418                                                 "What should go here!",         /* value */
 419                                                 "Header (Variable part) %02X %02X %02X %02X"  ,                 /* format */
 420                                                 0, 1, 2, 3
 421                                     );
 422                         } else {
 423                                 /* There is no variable part */
 424                         }; /* End of variable part of header */
 425                 }
 426         } else {
 427 #ifdef DEBUG
 428                 fprintf( stderr, "dissect_wtp: (4) tree was %p\n", tree );
 429 #endif
 430         }
 431
 432         /* Any remaining data ought to be WSP data,
 433          * so hand off to the WSP dissector */
 434         if (tvb_reported_length (tvb) > cbHeader)
 435         {
 436                 wsp_tvb = tvb_new_subset(tvb, cbHeader, -1,
 437                         tvb_reported_length (tvb)-cbHeader);
 438                 call_dissector(wsp_handle, wsp_tvb, pinfo, tree);
 439         }
 440
 441 #ifdef DEBUG
 442         fprintf( stderr, "dissect_wtp: (leaving) fdata->cinfo is %p\n", fdata->cinfo );
 443 #endif
 444 }
 445
 446 static char pdu_type(unsigned char octet)
 447 {
 448         char ch = (octet >> 3) & 0x0F;
 449         /* Note pdu type must not be 0x00 */
 450         return ch;
 451 };
 452
 453 static char transaction_class(unsigned char octet)
 454 {
 455         char ch = (octet >> 0) & 0x03; /* ......XX */
 456         return ch;
 457 };
 458
 459 static char retransmission_indicator(unsigned char octet)
 460 {
 461         switch ( pdu_type(octet) ) {
 462                 case INVOKE:
 463                 case RESULT:
 464                 case ACK:
 465                 case SEGMENTED_INVOKE:
 466                 case SEGMENTED_RESULT:
 467                 case NEGATIVE_ACK:
 468                         return (octet >> 0) & 0x01; /* ......,X */
 469                 default:
 470                         return 0;
 471         }
 472 };
 473
 474 /* Register the protocol with Ethereal */
 475 void
 476 proto_register_wtp(void)
 477 {
 478
 479 /* Setup list of header fields */
 480         static hf_register_info hf[] = {
 481                 { &hf_wtp_header_fixed_part,
 482                         {       "Header",
 483                                 "wtp.header_fixed_part",
 484                                 FT_BYTES, BASE_HEX, NULL, 0x0,
 485                                 "Fixed part of the header", HFILL
 486                         }
 487                 },
 488                 { &hf_wtp_header_flag_continue,
 489                         {       "Continue Flag",
 490                                 "wtp.continue_flag",
 491                                 FT_BOOLEAN, 8, TFS( &continue_truth ), 0x80,
 492                                 "Continue Flag", HFILL
 493                         }
 494                 },
 495                 { &hf_wtp_header_pdu_type,
 496                         {       "PDU Type",
 497                                 "wtp.pdu_type",
 498                                  FT_UINT8, BASE_HEX, VALS( vals_pdu_type ), 0x78,
 499                                 "PDU Type", HFILL
 500                         }
 501                 },
 502                 { &hf_wtp_header_flag_Trailer,
 503                         {       "Trailer Flags",
 504                                 "wtp.trailer_flags",
 505                                  FT_UINT8, BASE_HEX, VALS( vals_transmission_trailer ), 0x06,
 506                                 "PDU Type", HFILL
 507                         }
 508                 },
 509                 { &hf_wtp_header_flag_RID,
 510                         {       "Re-transmission Indicator",
 511                                 "wtp.RID",
 512                                  FT_BOOLEAN, 8, TFS( &RID_truth ), 0x01,
 513                                 "Re-transmission Indicator", HFILL
 514                         }
 515                 },
 516                 { &hf_wtp_header_flag_TID_response,
 517                         {       "TID Response",
 518                                 "wtp.TID.response",
 519                                 FT_BOOLEAN, 16, TFS( &tid_response_truth ), 0x8000,
 520                                 "TID Response", HFILL
 521                         }
 522                 },
 523                 { &hf_wtp_header_flag_TID,
 524                         {       "Transmission ID",
 525                                 "wtp.TID",
 526                                  FT_UINT16, BASE_HEX, NULL, 0x7FFF,
 527                                 "Transmission ID", HFILL
 528                         }
 529                 },
 530                 { &hf_wtp_header_Inv_version,
 531                         {       "Version",
 532                                 "wtp.header.version",
 533                                  FT_UINT8, BASE_HEX, VALS( vals_version ), 0xC0,
 534                                 "Version", HFILL
 535                         }
 536                 },
 537                 { &hf_wtp_header_Inv_flag_TIDNew,
 538                         {       "TIDNew",
 539                                 "wtp.header.TIDNew",
 540                                  FT_BOOLEAN, 8, TFS( &TIDNew_truth ), 0x20,
 541                                 "TIDNew", HFILL
 542                         }
 543                 },
 544                 { &hf_wtp_header_Inv_flag_UP,
 545                         {       "U/P flag",
 546                                 "wtp.header.UP",
 547                                  FT_BOOLEAN, 8, TFS( &UP_truth ), 0x10,
 548                                 "U/P Flag", HFILL
 549                         }
 550                 },
 551                 { &hf_wtp_header_Inv_Reserved,
 552                         {       "Reserved",
 553                                 "wtp.inv.reserved",
 554                                  FT_UINT8, BASE_HEX, NULL, 0x0C,
 555                                 "Reserved", HFILL
 556                         }
 557                 },
 558                 { &hf_wtp_header_Inv_TransactionClass,
 559                         {       "Transaction Class",
 560                                 "wtp.inv.transaction_class",
 561                                  FT_UINT8, BASE_HEX, NULL, 0x03,
 562                                 "Transaction Class", HFILL
 563                         }
 564                 },
 565                 { &hf_wtp_header_Ack_flag_TVETOK,
 566                         {       "Tve/Tok flag",
 567                                 "wtp.ack.tvetok",
 568                                  FT_BOOLEAN, 8, TFS( &TVETOK_truth ), 0x04,
 569                                 "Tve/Tok flag", HFILL
 570                         }
 571                 },
 572                 { &hf_wtp_header_Abort_type,
 573                         {       "Abort Type",
 574                                 "wtp.abort.type",
 575                                  FT_UINT8, BASE_HEX, VALS ( vals_abort_type ), 0x07,
 576                                 "Abort Type", HFILL
 577                         }
 578                 },
 579                 { &hf_wtp_header_Abort_reason_provider,
 580                         {       "Abort Reason",
 581                                 "wtp.abort.reason.provider",
 582                                  FT_UINT8, BASE_HEX, VALS ( vals_abort_reason_provider ), 0x00,
 583                                 "Abort Reason", HFILL
 584                         }
 585                 },
 586                 /* Assume WSP is the user and use its reason codes */
 587                 { &hf_wtp_header_Abort_reason_user,
 588                         {       "Abort Reason",
 589                                 "wtp.abort.reason.user",
 590                                  FT_UINT8, BASE_HEX, VALS ( vals_wsp_reason_codes ), 0x00,
 591                                 "Abort Reason", HFILL
 592                         }
 593                 },
 594                 { &hf_wtp_header_sequence_number,
 595                         {       "Packet Sequence Number",
 596                                 "wtp.header.sequence",
 597                                  FT_UINT8, BASE_HEX, NULL, 0x00,
 598                                 "Packet Sequence Number", HFILL
 599                         }
 600                 },
 601                 { &hf_wtp_header_missing_packets,
 602                         {       "Missing Packets",
 603                                 "wtp.header.missing_packets",
 604                                  FT_UINT8, BASE_HEX, NULL, 0x00,
 605                                 "Missing Packets", HFILL
 606                         }
 607                 },
 608                 { &hf_wtp_header_variable_part,
 609                         {       "Header: Variable part",
 610                                 "wtp.header_variable_part",
 611                                 FT_BYTES, BASE_HEX, NULL, 0x0,
 612                                 "Variable part of the header", HFILL
 613                         }
 614                 },
 615                 { &hf_wtp_data,
 616                         {       "Data",
 617                                 "wtp.header_data",
 618                                 FT_BYTES, BASE_HEX, NULL, 0x0,
 619                                 "Data", HFILL
 620                         }
 621                 },
 622         };
 623
 624 /* Setup protocol subtree array */
 625         static gint *ett[] = {
 626                 &ett_wtp,
 627                 &ett_header,
 628         };
 629
 630 /* Register the protocol name and description */
 631         proto_wtp = proto_register_protocol(
 632                 "Wireless Transaction Protocol",   /* protocol name for use by ethereal */
 633                 "WTP",                             /* short version of name */
 634                 "wap-wsp-wtp"                      /* Abbreviated protocol name, should Match IANA
 635                                                     < URL:http://www.isi.edu/in-notes/iana/assignments/port-numbers/ >
 636                                                   */
 637         );
 638
 639 /* Required function calls to register the header fields and subtrees used */
 640         proto_register_field_array(proto_wtp, hf, array_length(hf));
 641         proto_register_subtree_array(ett, array_length(ett));
 642 };
 643
 644 void
 645 proto_reg_handoff_wtp(void)
 646 {
 647         /*
 648          * Get a handle for the IP WSP dissector - if WTP PDUs have data, it is WSP
 649          */
 650         wsp_handle = find_dissector("wsp");
 651
 652         dissector_add("udp.port", UDP_PORT_WTP_WSP, dissect_wtp, proto_wtp);
 653 }