packet-quake.c

   1 /* packet-quake.c
   2  * Routines for Quake packet dissection
   3  *
   4  * Uwe Girlich <uwe@planetquake.com>
   5  *      http://www.idsoftware.com/q1source/q1source.zip
   6  *
   7  * $Id: packet-quake.c,v 1.26 2002/04/02 06:28:16 girlich Exp $
   8  *
   9  * Ethereal - Network traffic analyzer
  10  * By Gerald Combs <gerald@ethereal.com>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * Copied from packet-tftp.c
  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 #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 #include <glib.h>
  43 #include <epan/packet.h>
  44 #include <epan/conversation.h>
  45 #include "prefs.h"
  46
  47 static int proto_quake = -1;
  48 static int hf_quake_header_flags = -1;
  49 static int hf_quake_header_length = -1;
  50 static int hf_quake_header_sequence = -1;
  51 static int hf_quake_control_command = -1;
  52
  53 static int hf_quake_CCREQ_CONNECT_game = -1;
  54 static int hf_quake_CCREQ_CONNECT_version = -1;
  55 static int hf_quake_CCREQ_SERVER_INFO_game = -1;
  56 static int hf_quake_CCREQ_SERVER_INFO_version = -1;
  57 static int hf_quake_CCREQ_PLAYER_INFO_player = -1;
  58 static int hf_quake_CCREQ_RULE_INFO_lastrule = -1;
  59
  60 static int hf_quake_CCREP_ACCEPT_port = -1;
  61 static int hf_quake_CCREP_REJECT_reason = -1;
  62 static int hf_quake_CCREP_SERVER_INFO_address = -1;
  63 static int hf_quake_CCREP_SERVER_INFO_server = -1;
  64 static int hf_quake_CCREP_SERVER_INFO_map = -1;
  65 static int hf_quake_CCREP_SERVER_INFO_num_player = -1;
  66 static int hf_quake_CCREP_SERVER_INFO_max_player = -1;
  67 static int hf_quake_CCREP_PLAYER_INFO_name = -1;
  68 static int hf_quake_CCREP_PLAYER_INFO_colors = -1;
  69 static int hf_quake_CCREP_PLAYER_INFO_colors_shirt = -1;
  70 static int hf_quake_CCREP_PLAYER_INFO_colors_pants = -1;
  71 static int hf_quake_CCREP_PLAYER_INFO_frags = -1;
  72 static int hf_quake_CCREP_PLAYER_INFO_connect_time = -1;
  73 static int hf_quake_CCREP_PLAYER_INFO_address = -1;
  74 static int hf_quake_CCREP_RULE_INFO_rule = -1;
  75 static int hf_quake_CCREP_RULE_INFO_value = -1;
  76
  77
  78 static gint ett_quake = -1;
  79 static gint ett_quake_control = -1;
  80 static gint ett_quake_control_colors = -1;
  81 static gint ett_quake_flags = -1;
  82
  83 static dissector_handle_t quake_handle;
  84 static dissector_handle_t data_handle;
  85
  86 /* I took these names directly out of the Q1 source. */
  87 #define NETFLAG_LENGTH_MASK 0x0000ffff
  88 #define NET_HEADERSIZE 8
  89 #define DEFAULTnet_hostport 26000
  90 static unsigned int gbl_quakeServerPort=DEFAULTnet_hostport;
  91
  92 #define NETFLAG_LENGTH_MASK     0x0000ffff
  93 #define NETFLAG_DATA            0x00010000
  94 #define NETFLAG_ACK                     0x00020000
  95 #define NETFLAG_NAK                     0x00040000
  96 #define NETFLAG_EOM                     0x00080000
  97 #define NETFLAG_UNRELIABLE      0x00100000
  98 #define NETFLAG_CTL                     0x80000000
  99
 100
 101 #define CCREQ_CONNECT           0x01
 102 #define CCREQ_SERVER_INFO       0x02
 103 #define CCREQ_PLAYER_INFO       0x03
 104 #define CCREQ_RULE_INFO         0x04
 105
 106 #define CCREP_ACCEPT            0x81
 107 #define CCREP_REJECT            0x82
 108 #define CCREP_SERVER_INFO       0x83
 109 #define CCREP_PLAYER_INFO       0x84
 110 #define CCREP_RULE_INFO         0x85
 111
 112 static const value_string names_control_command[] = {
 113         {       CCREQ_CONNECT, "connect" },
 114         {       CCREQ_SERVER_INFO, "server_info" },
 115         {       CCREQ_PLAYER_INFO, "player_info" },
 116         {       CCREQ_RULE_INFO, "rule_info" },
 117         {       CCREP_ACCEPT, "accept" },
 118         {       CCREP_REJECT, "reject" },
 119         {       CCREP_SERVER_INFO, "server_info" },
 120         {       CCREP_PLAYER_INFO, "player_info" },
 121         {       CCREP_RULE_INFO, "rule_info" },
 122         { 0, NULL }
 123 };
 124
 125 #define CCREQ 0x00
 126 #define CCREP 0x80
 127
 128 #define QUAKE_MAXSTRING 0x800
 129
 130 static const value_string names_control_direction[] = {
 131         { CCREQ, "Request" },
 132         { CCREP, "Reply" },
 133         { 0, NULL }
 134 };
 135
 136
 137 static const value_string names_colors[] = {
 138         {  0, "White" },
 139         {  1, "Brown" },
 140         {  2, "Lavender" },
 141         {  3, "Khaki" },
 142         {  4, "Red" },
 143         {  5, "Lt Brown" },
 144         {  6, "Peach" },
 145         {  7, "Lt Peach" },
 146         {  8, "Purple" },
 147         {  9, "Dk Purple" },
 148         { 10, "Tan" },
 149         { 11, "Green" },
 150         { 12, "Yellow" },
 151         { 13, "Blue" },
 152         { 14, "Blue" },
 153         { 15, "Blue" },
 154         {  0, NULL }
 155 };
 156
 157
 158 static void dissect_quake(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
 159
 160
 161
 162 static void
 163 dissect_quake_CCREQ_CONNECT
 164 (tvbuff_t *tvb, proto_tree *tree)
 165 {
 166         gint maxbufsize;
 167         char game[QUAKE_MAXSTRING];
 168         guint8 version;
 169         gint len;
 170
 171         maxbufsize = MIN(sizeof(game), tvb_length(tvb));
 172         len = tvb_get_nstringz0(tvb, 0, maxbufsize, game);
 173         version = tvb_get_guint8(tvb, len + 1);
 174
 175         if (tree) {
 176                 proto_tree_add_string(tree, hf_quake_CCREQ_CONNECT_game,
 177                         tvb, 0, len + 1, game);
 178                 proto_tree_add_uint(tree, hf_quake_CCREQ_CONNECT_version,
 179                         tvb, len + 1, 1, version);
 180         }
 181 }
 182
 183
 184 static void
 185 dissect_quake_CCREQ_SERVER_INFO
 186 (tvbuff_t *tvb, proto_tree *tree)
 187 {
 188         gint maxbufsize;
 189         char game[QUAKE_MAXSTRING];
 190         guint8 version;
 191         gint len;
 192
 193         maxbufsize = MIN(sizeof(game), tvb_length(tvb));
 194         len = tvb_get_nstringz0(tvb, 0, maxbufsize, game);
 195         version = tvb_get_guint8(tvb, len + 1);
 196
 197         if (tree) {
 198                 proto_tree_add_string(tree, hf_quake_CCREQ_SERVER_INFO_game,
 199                         tvb, 0, len + 1, game);
 200                 proto_tree_add_uint(tree, hf_quake_CCREQ_SERVER_INFO_version,
 201                         tvb, len + 1, 1, version);
 202         }
 203 }
 204
 205
 206 static void
 207 dissect_quake_CCREQ_PLAYER_INFO
 208 (tvbuff_t *tvb, proto_tree *tree)
 209 {
 210         guint8 player;
 211
 212         player = tvb_get_guint8(tvb, 0);
 213         if (tree) {
 214                  proto_tree_add_uint(tree, hf_quake_CCREQ_PLAYER_INFO_player,
 215                         tvb, 0, 1, player);
 216         }
 217 }
 218
 219
 220 static void
 221 dissect_quake_CCREQ_RULE_INFO
 222 (tvbuff_t *tvb, proto_tree *tree)
 223 {
 224         char rule[QUAKE_MAXSTRING];
 225         gint maxbufsize;
 226         gint len;
 227
 228         maxbufsize = MIN(sizeof(rule), tvb_length(tvb));
 229         len = tvb_get_nstringz0(tvb, 0, maxbufsize, rule);
 230         if (tree) {
 231                 proto_tree_add_string(tree, hf_quake_CCREQ_RULE_INFO_lastrule,
 232                         tvb, 0, len + 1, rule);
 233         }
 234 }
 235
 236
 237 static void
 238 dissect_quake_CCREP_ACCEPT
 239 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 240 {
 241         guint32 port;
 242         conversation_t *c;
 243
 244         port = tvb_get_letohl(tvb, 0);
 245         c = conversation_new( &pinfo->src, &pinfo->dst, PT_UDP, port,
 246             pinfo->destport, 0);
 247         if (c) {
 248                 conversation_set_dissector(c, quake_handle);
 249         }
 250         if (tree) {
 251                 proto_tree_add_uint(tree, hf_quake_CCREP_ACCEPT_port,
 252                         tvb, 0, 4, port);
 253         }
 254 }
 255
 256
 257 static void
 258 dissect_quake_CCREP_REJECT
 259 (tvbuff_t *tvb, proto_tree *tree)
 260 {
 261         gint maxbufsize;
 262         char reason[QUAKE_MAXSTRING];
 263         gint len;
 264
 265         maxbufsize = MIN(sizeof(reason), tvb_length(tvb));
 266         len = tvb_get_nstringz0(tvb, 0, maxbufsize, reason);
 267
 268         if (tree) {
 269                 proto_tree_add_string(tree, hf_quake_CCREP_REJECT_reason,
 270                         tvb, 0, len + 1, reason);
 271         }
 272 }
 273
 274
 275 static void
 276 dissect_quake_CCREP_SERVER_INFO
 277 (tvbuff_t *tvb, proto_tree *tree)
 278 {
 279         gint offset;
 280         gint len;
 281         gint maxbufsize;
 282         char address[QUAKE_MAXSTRING];
 283         char server[QUAKE_MAXSTRING];
 284         char map[QUAKE_MAXSTRING];
 285
 286         guint8 num_player;
 287         guint8 max_player;
 288         guint8 version;
 289
 290         offset = 0;
 291
 292         maxbufsize = MIN((int)sizeof(address), tvb_length_remaining(tvb, offset));
 293         len = tvb_get_nstringz0(tvb, offset, maxbufsize, address);
 294         if (tree) {
 295                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_address,
 296                         tvb, offset, len + 1, address);
 297         }
 298         offset += len + 1;
 299
 300         maxbufsize = MIN((int)sizeof(server), tvb_length_remaining(tvb, offset));
 301         len = tvb_get_nstringz0(tvb, offset, maxbufsize, server);
 302         if (tree) {
 303                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_server,
 304                         tvb, offset, len + 1, server);
 305         }
 306         offset += len + 1;
 307
 308         maxbufsize = MIN((int)sizeof(map), tvb_length_remaining(tvb, offset));
 309         len = tvb_get_nstringz0(tvb, offset, maxbufsize, map);
 310         if (tree) {
 311                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_map,
 312                         tvb, offset, len + 1, map);
 313         }
 314         offset += len + 1;
 315
 316         num_player = tvb_get_guint8(tvb, offset + 0);
 317         max_player = tvb_get_guint8(tvb, offset + 1);
 318         version    = tvb_get_guint8(tvb, offset + 2);
 319
 320         if (tree) {
 321                 proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_num_player,
 322                         tvb, offset + 0, 1, num_player);
 323                 proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_max_player,
 324                         tvb, offset + 1, 1, max_player);
 325                 proto_tree_add_uint(tree, hf_quake_CCREQ_SERVER_INFO_version,
 326                         tvb, offset + 2, 1, version);
 327         }
 328 }
 329
 330
 331 static void
 332 dissect_quake_CCREP_PLAYER_INFO
 333 (tvbuff_t *tvb, proto_tree *tree)
 334 {
 335         gint offset;
 336         guint8 player;
 337         gint len;
 338         gint maxbufsize;
 339         char name[QUAKE_MAXSTRING];
 340         guint32 colors;
 341         guint32 color_shirt;
 342         guint32 color_pants;
 343         guint32 frags;
 344         guint32 connect_time;
 345         char address[QUAKE_MAXSTRING];
 346
 347         offset = 0;
 348
 349         player = tvb_get_guint8(tvb, offset);
 350         if (tree) {
 351                 proto_tree_add_uint(tree, hf_quake_CCREQ_PLAYER_INFO_player,
 352                         tvb, offset, 1, player);
 353         }
 354         offset += 1;
 355
 356         maxbufsize = MIN((int)sizeof(name), tvb_length_remaining(tvb, offset));
 357         len = tvb_get_nstringz0(tvb, offset, maxbufsize, name);
 358         if (tree) {
 359                 proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_name,
 360                         tvb, offset, len + 1, name);
 361         }
 362         offset += len + 1;
 363
 364         colors       = tvb_get_letohl(tvb, offset + 0);
 365         color_shirt = (colors >> 4) & 0x0f;
 366         color_pants = (colors     ) & 0x0f;
 367         frags        = tvb_get_letohl(tvb, offset + 4);
 368         connect_time = tvb_get_letohl(tvb, offset + 8);
 369         if (tree) {
 370                 proto_item *colors_item;
 371                 proto_tree *colors_tree;
 372
 373                 colors_item = proto_tree_add_uint(tree,
 374                         hf_quake_CCREP_PLAYER_INFO_colors,
 375                         tvb, offset + 0, 4, colors);
 376                 if (colors_item) {
 377                         colors_tree = proto_item_add_subtree(colors_item,
 378                                         ett_quake_control_colors);
 379                         proto_tree_add_uint(colors_tree,
 380                                 hf_quake_CCREP_PLAYER_INFO_colors_shirt,
 381                                 tvb, offset + 0, 1, color_shirt);
 382                         proto_tree_add_uint(colors_tree,
 383                                 hf_quake_CCREP_PLAYER_INFO_colors_pants,
 384                                 tvb, offset + 0, 1, color_pants);
 385                 }
 386                 proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_frags,
 387                         tvb, offset + 4, 4, frags);
 388                 proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_connect_time,
 389                         tvb, offset + 8, 4, connect_time);
 390         }
 391         offset += 3*4;
 392
 393         maxbufsize = MIN((int)sizeof(address), tvb_length_remaining(tvb, offset));
 394         len = tvb_get_nstringz0(tvb, offset, maxbufsize, address);
 395         if (tree) {
 396                 proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_address,
 397                         tvb, offset, len + 1, address);
 398         }
 399         offset += len + 1;
 400 }
 401
 402
 403 static void
 404 dissect_quake_CCREP_RULE_INFO
 405 (tvbuff_t *tvb, proto_tree *tree)
 406 {
 407         char rule[QUAKE_MAXSTRING];
 408         char value[QUAKE_MAXSTRING];
 409         gint maxbufsize;
 410         gint len;
 411         gint offset;
 412
 413         if (tvb_length(tvb) == 0) return;
 414
 415         offset = 0;
 416
 417         maxbufsize = MIN((int)sizeof(rule), tvb_length_remaining(tvb, offset));
 418         len = tvb_get_nstringz0(tvb, offset, maxbufsize, rule);
 419         if (tree) {
 420                 proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_rule,
 421                         tvb, offset, len + 1, rule);
 422         }
 423         offset += len + 1;
 424
 425         maxbufsize = MIN((int)sizeof(value), tvb_length_remaining(tvb, offset));
 426         len = tvb_get_nstringz0(tvb, offset, maxbufsize, value);
 427         if (tree) {
 428                 proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_value,
 429                         tvb, offset, len + 1, value);
 430         }
 431         offset += len + 1;
 432 }
 433
 434
 435 static void
 436 dissect_quake_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 437 {
 438         guint8          command;
 439         int             direction;
 440         proto_item      *control_item = NULL;
 441         proto_tree      *control_tree = NULL;
 442         guint           rest_length;
 443         tvbuff_t        *next_tvb;
 444
 445         command = tvb_get_guint8(tvb, 0);
 446         direction = (command & 0x80) ? CCREP : CCREQ;
 447
 448         if (check_col(pinfo->cinfo, COL_INFO)) {
 449                 col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s",
 450                         val_to_str(command,names_control_command, "%u"),
 451                         val_to_str(direction,names_control_direction,"%u"));
 452         }
 453
 454         if (tree) {
 455                 control_item = proto_tree_add_text(tree, tvb,
 456                                 0, -1, "Control %s: %s",
 457                                 val_to_str(direction, names_control_direction, "%u"),
 458                                 val_to_str(command, names_control_command, "%u"));
 459                 if (control_item)
 460                         control_tree = proto_item_add_subtree(control_item,
 461                                                 ett_quake_control);
 462                 proto_tree_add_uint(control_tree, hf_quake_control_command,
 463                                         tvb, 0, 1, command);
 464         }
 465
 466         rest_length = tvb_reported_length(tvb) - 1;
 467         next_tvb = tvb_new_subset(tvb, 1, rest_length , rest_length);
 468         switch (command) {
 469                 case CCREQ_CONNECT:
 470                         dissect_quake_CCREQ_CONNECT
 471                         (next_tvb, control_tree);
 472                 break;
 473                 case CCREQ_SERVER_INFO:
 474                         dissect_quake_CCREQ_SERVER_INFO
 475                         (next_tvb, control_tree);
 476                 break;
 477                 case CCREQ_PLAYER_INFO:
 478                         dissect_quake_CCREQ_PLAYER_INFO
 479                         (next_tvb, control_tree);
 480                 break;
 481                 case CCREQ_RULE_INFO:
 482                         dissect_quake_CCREQ_RULE_INFO
 483                         (next_tvb, control_tree);
 484                 break;
 485                 case CCREP_ACCEPT:
 486                         dissect_quake_CCREP_ACCEPT
 487                         (next_tvb, pinfo, control_tree);
 488                 break;
 489                 case CCREP_REJECT:
 490                         dissect_quake_CCREP_REJECT
 491                         (next_tvb, control_tree);
 492                 break;
 493                 case CCREP_SERVER_INFO:
 494                         dissect_quake_CCREP_SERVER_INFO
 495                         (next_tvb, control_tree);
 496                 break;
 497                 case CCREP_PLAYER_INFO:
 498                         dissect_quake_CCREP_PLAYER_INFO
 499                         (next_tvb, control_tree);
 500                 break;
 501                 case CCREP_RULE_INFO:
 502                         dissect_quake_CCREP_RULE_INFO
 503                         (next_tvb, control_tree);
 504                 break;
 505                 default:
 506                         call_dissector(data_handle,next_tvb, pinfo, control_tree);
 507                 break;
 508         }
 509 }
 510
 511
 512 static void
 513 dissect_quake(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 514 {
 515         proto_tree      *quake_tree = NULL;
 516         proto_item      *quake_item = NULL;
 517         guint32         length;
 518         guint32         flags;
 519         guint32         sequence = 0;
 520         guint           rest_length;
 521         tvbuff_t        *next_tvb;
 522
 523         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 524                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "QUAKE");
 525         if (check_col(pinfo->cinfo, COL_INFO))
 526                 col_clear(pinfo->cinfo, COL_INFO);
 527
 528         length = tvb_get_ntohl(tvb, 0);
 529         flags = length & (~NETFLAG_LENGTH_MASK);
 530         length &= NETFLAG_LENGTH_MASK;
 531
 532         if (tree) {
 533                 quake_item = proto_tree_add_item(tree, proto_quake,
 534                                 tvb, 0, -1, FALSE);
 535                 if (quake_item)
 536                         quake_tree = proto_item_add_subtree(quake_item, ett_quake);
 537         }
 538
 539         if (quake_tree) {
 540                 proto_item* flags_item = NULL;
 541                 proto_tree* flags_tree = NULL;
 542
 543                 flags_item = proto_tree_add_uint(quake_tree, hf_quake_header_flags,
 544                         tvb, 0, 2, flags);
 545                 if (flags_item) {
 546                         flags_tree = proto_item_add_subtree(flags_item, ett_quake_flags);
 547                 }
 548
 549                 if (flags_tree) {
 550                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 551                                 decode_boolean_bitfield(flags, NETFLAG_DATA, 32,
 552                                 "Data","-"));
 553                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 554                                 decode_boolean_bitfield(flags, NETFLAG_ACK, 32,
 555                                 "Acknowledgment","-"));
 556                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 557                                 decode_boolean_bitfield(flags, NETFLAG_NAK, 32,
 558                                 "No Acknowledgment","-"));
 559                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 560                                 decode_boolean_bitfield(flags, NETFLAG_EOM, 32,
 561                                 "End Of Message","-"));
 562                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 563                                 decode_boolean_bitfield(flags, NETFLAG_UNRELIABLE, 32,
 564                                 "Unreliable","-"));
 565                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 566                                 decode_boolean_bitfield(flags, NETFLAG_CTL, 32,
 567                                 "Control","-"));
 568                 }
 569                 proto_tree_add_uint(quake_tree, hf_quake_header_length,
 570                         tvb, 2, 2, length);
 571         }
 572
 573         if (flags == NETFLAG_CTL) {
 574                 rest_length = tvb_reported_length(tvb) - 4;
 575                 next_tvb = tvb_new_subset(tvb, 4, rest_length , rest_length);
 576                 dissect_quake_control(next_tvb, pinfo, quake_tree);
 577                 return;
 578         }
 579
 580         sequence = tvb_get_ntohl(tvb, 4);
 581         if (check_col(pinfo->cinfo, COL_INFO)) {
 582                 col_add_fstr(pinfo->cinfo, COL_INFO, "seq 0x%x", sequence);
 583         }
 584         if (quake_tree) {
 585                 proto_tree_add_uint(quake_tree, hf_quake_header_sequence,
 586                         tvb, 4, 4, sequence);
 587         }
 588
 589         rest_length = tvb_reported_length(tvb) - 8;
 590         next_tvb = tvb_new_subset(tvb, 8, rest_length , rest_length);
 591         call_dissector(data_handle,next_tvb, pinfo, quake_tree);
 592 }
 593
 594
 595 void
 596 proto_reg_handoff_quake(void)
 597 {
 598         static int Initialized=FALSE;
 599         static int ServerPort=0;
 600
 601         if (Initialized) {
 602                 dissector_delete("udp.port", ServerPort, quake_handle);
 603         } else {
 604                 Initialized=TRUE;
 605         }
 606
 607         /* set port for future deletes */
 608         ServerPort=gbl_quakeServerPort;
 609
 610         dissector_add("udp.port", gbl_quakeServerPort, quake_handle);
 611         data_handle = find_dissector("data");
 612 }
 613
 614
 615 void
 616 proto_register_quake(void)
 617 {
 618   static hf_register_info hf[] = {
 619     { &hf_quake_header_flags,
 620       { "Flags", "quake.header.flags",
 621         FT_UINT16, BASE_HEX, NULL, 0x0,
 622         "Flags", HFILL }},
 623     { &hf_quake_header_length,
 624       { "Length", "quake.header.length",
 625         FT_UINT16, BASE_DEC, NULL, 0x0,
 626         "full data length", HFILL }},
 627     { &hf_quake_header_sequence,
 628       { "Sequence", "quake.header.sequence",
 629         FT_UINT32, BASE_HEX, NULL, 0x0,
 630         "Sequence Number", HFILL }},
 631     { &hf_quake_control_command,
 632       { "Command", "quake.control.command",
 633         FT_UINT8, BASE_HEX, VALS(names_control_command), 0x0,
 634         "Control Command", HFILL }},
 635     { &hf_quake_CCREQ_CONNECT_game,
 636       { "Game", "quake.control.connect.game",
 637         FT_STRING, BASE_DEC, NULL, 0x0,
 638         "Game Name", HFILL }},
 639     { &hf_quake_CCREQ_CONNECT_version,
 640       { "Version", "quake.control.connect.version",
 641         FT_UINT8, BASE_DEC, NULL, 0x0,
 642         "Game Protocol Version Number", HFILL }},
 643     { &hf_quake_CCREQ_SERVER_INFO_game,
 644       { "Game", "quake.control.server_info.game",
 645         FT_STRING, BASE_DEC, NULL, 0x0,
 646         "Game Name", HFILL }},
 647     { &hf_quake_CCREQ_SERVER_INFO_version,
 648       { "Version", "quake.control.server_info.version",
 649         FT_UINT8, BASE_DEC, NULL, 0x0,
 650         "Game Protocol Version Number", HFILL }},
 651     { &hf_quake_CCREQ_PLAYER_INFO_player,
 652       { "Player", "quake.control.player_info.player",
 653         FT_UINT8, BASE_DEC, NULL, 0x0,
 654         "Player", HFILL }},
 655     { &hf_quake_CCREQ_RULE_INFO_lastrule,
 656       { "Last Rule", "quake.control.rule_info.lastrule",
 657         FT_STRING, BASE_DEC, NULL, 0x0,
 658         "Last Rule Name", HFILL }},
 659     { &hf_quake_CCREP_ACCEPT_port,
 660       { "Port", "quake.control.accept.port",
 661         FT_UINT32, BASE_DEC, NULL, 0x0,
 662         "Game Data Port", HFILL }},
 663     { &hf_quake_CCREP_REJECT_reason,
 664       { "Reason", "quake.control.reject.reason",
 665         FT_STRING, BASE_DEC, NULL, 0x0,
 666         "Reject Reason", HFILL }},
 667     { &hf_quake_CCREP_SERVER_INFO_address,
 668       { "Address", "quake.control.server_info.address",
 669         FT_STRING, BASE_DEC, NULL, 0x0,
 670         "Server Address", HFILL }},
 671     { &hf_quake_CCREP_SERVER_INFO_server,
 672       { "Server", "quake.control.server_info.server",
 673         FT_STRING, BASE_DEC, NULL, 0x0,
 674         "Server Name", HFILL }},
 675     { &hf_quake_CCREP_SERVER_INFO_map,
 676       { "Map", "quake.control.server_info.map",
 677         FT_STRING, BASE_DEC, NULL, 0x0,
 678         "Map Name", HFILL }},
 679     { &hf_quake_CCREP_SERVER_INFO_num_player,
 680       { "Number of Players", "quake.control.server_info.num_player",
 681         FT_UINT8, BASE_DEC, NULL, 0x0,
 682         "Current Number of Players", HFILL }},
 683     { &hf_quake_CCREP_SERVER_INFO_max_player,
 684       { "Maximal Number of Players", "quake.control.server_info.max_player",
 685         FT_UINT8, BASE_DEC, NULL, 0x0,
 686         "Maximal Number of Players", HFILL }},
 687     { &hf_quake_CCREP_PLAYER_INFO_name,
 688       { "Name", "quake.control.player_info.name",
 689         FT_STRING, BASE_DEC, NULL, 0x0,
 690         "Player Name", HFILL }},
 691     { &hf_quake_CCREP_PLAYER_INFO_colors,
 692       { "Colors", "quake.control.player_info.colors",
 693         FT_UINT32, BASE_HEX, NULL, 0x0,
 694         "Player Colors", HFILL }},
 695     { &hf_quake_CCREP_PLAYER_INFO_colors_shirt,
 696       { "Shirt", "quake.control.player_info.colors.shirt",
 697         FT_UINT8, BASE_DEC, VALS(names_colors), 0x0,
 698         "Shirt Color", HFILL }},
 699     { &hf_quake_CCREP_PLAYER_INFO_colors_pants,
 700       { "Pants", "quake.control.player_info.colors.pants",
 701         FT_UINT8, BASE_DEC, VALS(names_colors), 0x0,
 702         "Pants Color", HFILL }},
 703     { &hf_quake_CCREP_PLAYER_INFO_frags,
 704       { "Frags", "quake.control.player_info.frags",
 705         FT_UINT32, BASE_DEC, NULL, 0x0,
 706         "Player Frags", HFILL }},
 707     { &hf_quake_CCREP_PLAYER_INFO_connect_time,
 708       { "Connect Time", "quake.control.player_info.connect_time",
 709         FT_UINT32, BASE_DEC, NULL, 0x0,
 710         "Player Connect Time", HFILL }},
 711     { &hf_quake_CCREP_PLAYER_INFO_address,
 712       { "Address", "quake.control.player_info.address",
 713         FT_STRING, BASE_DEC, NULL, 0x0,
 714         "Player Address", HFILL }},
 715     { &hf_quake_CCREP_RULE_INFO_rule,
 716       { "Rule", "quake.control.rule_info.rule",
 717         FT_STRING, BASE_DEC, NULL, 0x0,
 718         "Rule Name", HFILL }},
 719     { &hf_quake_CCREP_RULE_INFO_value,
 720       { "Value", "quake.control.rule_info.value",
 721         FT_STRING, BASE_DEC, NULL, 0x0,
 722         "Rule Value", HFILL }},
 723   };
 724         static gint *ett[] = {
 725                 &ett_quake,
 726                 &ett_quake_control,
 727                 &ett_quake_control_colors,
 728                 &ett_quake_flags,
 729         };
 730         module_t *quake_module;
 731
 732         proto_quake = proto_register_protocol("Quake Network Protocol",
 733                                         "QUAKE", "quake");
 734         proto_register_field_array(proto_quake, hf, array_length(hf));
 735         proto_register_subtree_array(ett, array_length(ett));
 736
 737         quake_handle = create_dissector_handle(dissect_quake, proto_quake);
 738
 739         /* Register a configuration option for port */
 740         quake_module = prefs_register_protocol(proto_quake,
 741                 proto_reg_handoff_quake);
 742         prefs_register_uint_preference(quake_module, "udp.port",
 743                                         "Quake Server UDP Port",
 744                                         "Set the UDP port for the Quake Server",
 745                                         10, &gbl_quakeServerPort);
 746 }