epan/dissectors/packet-quake3.c

   1 /* packet-quake3.c
   2  * Routines for Quake III Arena packet dissection
   3  *
   4  * Uwe Girlich <uwe@planetquake.com>
   5  *
   6  * $Id$
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * Copied from packet-quake2.c
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  27  */
  28
  29
  30 /*
  31    All informations used in this decoding were gathered from
  32         * some own captures of a private server,
  33         * the "Server commands howto" document written by id Software
  34                 (http://www.quake3arena.com/tech/ServerCommandsHowto.html)
  35         * source code of the game server browser tool qstat
  36                 (http://www.qstat.org).
  37 */
  38
  39
  40 #include "config.h"
  41
  42 #include <string.h>
  43 #include <glib.h>
  44 #include <epan/packet.h>
  45 #include <epan/prefs.h>
  46 #include <epan/addr_resolv.h>
  47
  48 static int proto_quake3 = -1;
  49
  50 static int hf_quake3_direction = -1;
  51 static int hf_quake3_connectionless = -1;
  52 static int hf_quake3_game = -1;
  53 static int hf_quake3_connectionless_marker = -1;
  54 static int hf_quake3_connectionless_text = -1;
  55 static int hf_quake3_connectionless_command = -1;
  56 static int hf_quake3_server_addr = -1;
  57 static int hf_quake3_server_port = -1;
  58 static int hf_quake3_game_seq1 = -1;
  59 static int hf_quake3_game_rel1 = -1;
  60 static int hf_quake3_game_seq2 = -1;
  61 static int hf_quake3_game_rel2 = -1;
  62 static int hf_quake3_game_qport = -1;
  63
  64 static gint ett_quake3 = -1;
  65 static gint ett_quake3_connectionless = -1;
  66 static gint ett_quake3_connectionless_text = -1;
  67 static gint ett_quake3_server = -1;
  68 static gint ett_quake3_game = -1;
  69 static gint ett_quake3_game_seq1 = -1;
  70 static gint ett_quake3_game_seq2 = -1;
  71 static gint ett_quake3_game_clc = -1;
  72 static gint ett_quake3_game_svc = -1;
  73
  74 static dissector_handle_t data_handle;
  75
  76 #define QUAKE3_SERVER_PORT 27960
  77 #define QUAKE3_MASTER_PORT 27950
  78 static guint gbl_quake3_server_port=QUAKE3_SERVER_PORT;
  79 static guint gbl_quake3_master_port=QUAKE3_MASTER_PORT;
  80
  81
  82 static const value_string names_direction[] = {
  83 #define DIR_UNKNOWN 0
  84         { DIR_UNKNOWN, "Unknown" },
  85 #define DIR_C2S 1
  86         { DIR_C2S, "Client to Server" },
  87 #define DIR_S2C 2
  88         { DIR_S2C, "Server to Client" },
  89 #define DIR_C2M 3
  90         { DIR_C2M, "Client to Master" },
  91 #define DIR_M2C 4
  92         { DIR_M2C, "Master to Client" },
  93         { 0, NULL }
  94 };
  95
  96
  97 #define string_starts_with(s1, s2) (strncmp((s1), (s2), strlen(s2)) == 0)
  98
  99
 100 static const value_string names_command[] = {
 101 #define COMMAND_UNKNOWN                 0
 102         { COMMAND_UNKNOWN,              "Unknown" },
 103 #define COMMAND_statusResponse          1
 104         { COMMAND_statusResponse,       "Reply Status" },
 105 #define COMMAND_getstatus               2
 106         { COMMAND_getstatus,            "Request Status" },
 107 #define COMMAND_infoResponse            3
 108         { COMMAND_infoResponse,         "Reply Info" },
 109 #define COMMAND_getinfo                 4
 110         { COMMAND_getinfo,              "Request Info" },
 111 #define COMMAND_challengeResponse       5
 112         { COMMAND_challengeResponse,    "Reply Challenge" },
 113 #define COMMAND_getchallenge            6
 114         { COMMAND_getchallenge,         "Request Challenge" },
 115 #define COMMAND_connectResponse         7
 116         { COMMAND_connectResponse,      "Reply Connect" },
 117 #define COMMAND_connect                 8
 118         { COMMAND_connect,              "Request Connect" },
 119 #define COMMAND_rconResponse            9
 120         { COMMAND_rconResponse,         "Reply Remote Command" },
 121 #define COMMAND_rcon                    10
 122         { COMMAND_rcon,                 "Request Remote Command" },
 123 #define COMMAND_getmotdResponse         11
 124         { COMMAND_getmotdResponse,      "Reply Motto of the Day" },
 125 #define COMMAND_getmotd                 12
 126         { COMMAND_getmotd,              "Request Motto of the Day" },
 127 #define COMMAND_getserversResponse      13
 128         { COMMAND_getserversResponse,   "Reply Servers" },
 129 #define COMMAND_getservers              14
 130         { COMMAND_getservers,           "Request Servers" },
 131 #define COMMAND_getKeyAuthorize         15
 132         { COMMAND_getKeyAuthorize,      "Request Key Authorization" },
 133 #define COMMAND_getIpAuthorize          16
 134         { COMMAND_getIpAuthorize,       "Request IP Authorization" },
 135 #define COMMAND_ipAuthorize             17
 136         { COMMAND_ipAuthorize,          "Reply IP Authorization" },
 137         { 0, NULL }
 138 };
 139
 140
 141 static void
 142 dissect_quake3_ConnectionlessPacket(tvbuff_t *tvb, packet_info *pinfo _U_,
 143         proto_tree *tree, int* direction)
 144 {
 145         proto_tree      *cl_tree = NULL;
 146         proto_item      *text_item = NULL;
 147         proto_tree      *text_tree = NULL;
 148         guint8          text[2048];
 149         int             len;
 150         int             offset;
 151         guint32         marker;
 152         int             command;
 153         int             command_len;
 154         gboolean        command_finished = FALSE;
 155
 156         marker = tvb_get_ntohl(tvb, 0);
 157         if (tree) {
 158                 proto_item *cl_item = NULL;
 159                 cl_item = proto_tree_add_text(tree, tvb,
 160                                 0, -1, "Connectionless");
 161                 cl_tree = proto_item_add_subtree(cl_item, ett_quake3_connectionless);
 162
 163                 proto_tree_add_uint(cl_tree, hf_quake3_connectionless_marker,
 164                                     tvb, 0, 4, marker);
 165         }
 166         /* all the rest of the packet is just text */
 167         offset = 4;
 168
 169         len = tvb_get_nstringz0(tvb, offset, sizeof(text), text);
 170         if (cl_tree) {
 171                 text_item = proto_tree_add_string(cl_tree,
 172                                 hf_quake3_connectionless_text,
 173                                 tvb, offset, len + 1, text);
 174                 text_tree = proto_item_add_subtree(text_item, ett_quake3_connectionless_text);
 175         }
 176
 177         command = COMMAND_UNKNOWN;
 178         command_len = 0;
 179
 180         if (strncmp(text, "statusResponse", 14) == 0) {
 181                 command = COMMAND_statusResponse;
 182                 *direction = DIR_S2C;
 183                 command_len = 14;
 184         }
 185         else if (strncmp(text, "getstatus", 9) == 0) {
 186                 command = COMMAND_getstatus;
 187                 *direction = DIR_C2S;
 188                 command_len = 9;
 189         }
 190         else if (strncmp(text, "infoResponse", 12) == 0) {
 191                 command = COMMAND_infoResponse;
 192                 *direction = DIR_S2C;
 193                 command_len = 12;
 194         }
 195         else if (strncmp(text, "getinfo", 7) == 0) {
 196                 command = COMMAND_getinfo;
 197                 *direction = DIR_C2S;
 198                 command_len = 7;
 199         }
 200         else if (strncmp(text, "challengeResponse", 17) == 0) {
 201                 command = COMMAND_challengeResponse;
 202                 *direction = DIR_S2C;
 203                 command_len = 17;
 204         }
 205         else if (strncmp(text, "getchallenge", 12) == 0) {
 206                 command = COMMAND_getchallenge;
 207                 *direction = DIR_C2S;
 208                 command_len = 12;
 209         }
 210         else if (strncmp(text, "connectResponse", 15) == 0) {
 211                 command = COMMAND_connectResponse;
 212                 *direction = DIR_S2C;
 213                 command_len = 15;
 214         }
 215         else if (strncmp(text, "connect", 7) == 0) {
 216                 command = COMMAND_connect;
 217                 *direction = DIR_C2S;
 218                 command_len = 7;
 219         }
 220         else if (strncmp(text, "rconResponse", 12) == 0) {
 221                 command = COMMAND_rconResponse;
 222                 *direction = DIR_S2C;
 223                 command_len = 12;
 224         }
 225         else if (strncmp(text, "rcon", 4) == 0) {
 226                 command = COMMAND_rcon;
 227                 *direction = DIR_C2S;
 228                 command_len = 4;
 229         }
 230         else if (strncmp(text, "getmotdResponse", 15) == 0) {
 231                 command = COMMAND_getmotdResponse;
 232                 *direction = DIR_M2C;
 233                 command_len = 15;
 234         }
 235         else if (strncmp(text, "getmotd", 7) == 0) {
 236                 command = COMMAND_getmotd;
 237                 *direction = DIR_C2M;
 238                 command_len = 7;
 239         }
 240         else if (strncmp(text, "getserversResponse", 18) == 0) {
 241                 int base;
 242                 command = COMMAND_getserversResponse;
 243                 *direction = DIR_M2C;
 244                 command_len = 18;
 245                 /* The data can contain 0's, and the text string is binary
 246                 anyway, so better replace the text string after the first
 247                 \ with "<DATA>". */
 248                 if (text_item) {
 249                         /* first correct the length until the end of the packet */
 250                         proto_item_set_len(text_item, tvb_length_remaining(tvb, offset));
 251                         /* then replace the text */
 252                         proto_item_set_text(text_item, "Text: getserversResponse<DATA>");
 253                 }
 254                 if (text_tree)
 255                         proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
 256                                         tvb, offset, command_len,
 257                                         val_to_str_const(command, names_command, "Unknown"));
 258                 command_finished = TRUE;
 259
 260                 /* now we decode all the rest */
 261                 base = offset + 18;
 262                 /* '/', ip-address in network order, port in network order */
 263                 while (tvb_reported_length_remaining(tvb, base) >= 7) {
 264                         guint32         ip_addr;
 265                         guint16         udp_port;
 266
 267                         ip_addr = tvb_get_ipv4(tvb, base + 1);
 268                         udp_port = tvb_get_ntohs(tvb, base + 5);
 269
 270                         /* It may be a good idea to create a conversation for
 271                                 every server in this list, as we'll see at
 272                                 least a getinfo request to each of them and they
 273                                 may run on totally unusual ports.  */
 274
 275                         if (text_tree) {
 276                                 proto_item *server_item;
 277                                 proto_tree *server_tree;
 278                                 server_item = proto_tree_add_text(text_tree,
 279                                         tvb, base, 7,
 280                                         "Server: %s:%u",
 281                                                 get_hostname(ip_addr),
 282                                                 udp_port);
 283                                 server_tree = proto_item_add_subtree(
 284                                         server_item,
 285                                         ett_quake3_server);
 286                                 proto_tree_add_ipv4(server_tree, hf_quake3_server_addr,
 287                                                     tvb, base + 1, 4, ip_addr);
 288                                 proto_tree_add_uint(server_tree, hf_quake3_server_port,
 289                                                     tvb, base + 5, 2, udp_port);
 290                         }
 291
 292                         base += 7;
 293                 }
 294         }
 295         else if (strncmp(text, "getservers", 10) == 0) {
 296                 command = COMMAND_getservers;
 297                 *direction = DIR_C2M;
 298                 command_len = 10;
 299         }
 300         else if (strncmp(text, "getKeyAuthorize", 15) == 0) {
 301                 command = COMMAND_getKeyAuthorize;
 302                 *direction = DIR_C2M;
 303                 command_len = 15;
 304         }
 305         else if (strncmp(text, "getIpAuthorize", 14) == 0) {
 306                 command = COMMAND_getIpAuthorize;
 307                 *direction = DIR_C2M;
 308                 command_len = 14;
 309         }
 310         else if (strncmp(text, "ipAuthorize", 11) == 0) {
 311                 command = COMMAND_ipAuthorize;
 312                 *direction = DIR_M2C;
 313                 command_len = 11;
 314         }
 315         else {
 316                 *direction = DIR_UNKNOWN;
 317         }
 318
 319         if (text_tree && command_finished == FALSE) {
 320                 proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
 321                                         tvb, offset, command_len,
 322                                         val_to_str_const(command, names_command, "Unknown"));
 323         }
 324
 325         /*offset += len + 1;*/
 326
 327 }
 328
 329
 330 static void
 331 dissect_quake3_client_commands(tvbuff_t *tvb, packet_info *pinfo,
 332         proto_tree *tree)
 333 {
 334         /* this shouldn't be too difficult */
 335         call_dissector(data_handle,tvb, pinfo, tree);
 336 }
 337
 338
 339 static void
 340 dissect_quake3_server_commands(tvbuff_t *tvb, packet_info *pinfo,
 341         proto_tree *tree)
 342 {
 343         /* It is totally forbidden to decode this any further,
 344         I wont do it. */
 345         call_dissector(data_handle,tvb, pinfo, tree);
 346 }
 347
 348
 349 static const value_string names_reliable[] = {
 350         { 0, "Non Reliable" },
 351         { 1, "Reliable" },
 352         { 0, NULL }
 353 };
 354
 355
 356 static void
 357 dissect_quake3_GamePacket(tvbuff_t *tvb, packet_info *pinfo,
 358         proto_tree *tree, int *direction)
 359 {
 360         proto_tree      *game_tree = NULL;
 361         guint32         seq1;
 362         guint32         seq2;
 363         int             rel1;
 364         int             rel2;
 365         int             offset;
 366         guint           rest_length;
 367
 368         *direction = (pinfo->destport == gbl_quake3_server_port) ?
 369                         DIR_C2S : DIR_S2C;
 370
 371         if (tree) {
 372                 proto_item *game_item;
 373                 game_item = proto_tree_add_text(tree, tvb, 0, -1, "Game");
 374                 game_tree = proto_item_add_subtree(game_item, ett_quake3_game);
 375         }
 376
 377         offset = 0;
 378
 379         seq1 = tvb_get_letohs(tvb, offset);
 380         rel1 = seq1 & 0x8000 ? 1 : 0;
 381         seq1 &= ~0x8000;
 382         if (game_tree) {
 383                 proto_item *seq1_item = proto_tree_add_text(game_tree,
 384                         tvb, offset, 2, "Current Sequence: %u (%s)",
 385                         seq1, val_to_str(rel1,names_reliable,"%u"));
 386                 proto_tree *seq1_tree = proto_item_add_subtree(
 387                         seq1_item, ett_quake3_game_seq1);
 388                 proto_tree_add_uint(seq1_tree, hf_quake3_game_seq1,
 389                                     tvb, offset, 2, seq1);
 390                 proto_tree_add_boolean(seq1_tree, hf_quake3_game_rel1,
 391                                        tvb, offset+1, 1, rel1);
 392         }
 393         offset += 2;
 394
 395         seq2 = tvb_get_letohs(tvb, offset);
 396         rel2 = seq2 & 0x8000 ? 1 : 0;
 397         seq2 &= ~0x8000;
 398         if (game_tree) {
 399                 proto_item *seq2_item = proto_tree_add_text(game_tree,
 400                         tvb, offset, 2, "Acknowledge Sequence: %u (%s)",
 401                         seq2, val_to_str(rel2,names_reliable,"%u"));
 402                 proto_tree *seq2_tree = proto_item_add_subtree(
 403                         seq2_item, ett_quake3_game_seq2);
 404                 proto_tree_add_uint(seq2_tree, hf_quake3_game_seq2,
 405                                     tvb, offset, 2, seq2);
 406                 proto_tree_add_boolean(seq2_tree, hf_quake3_game_rel2,
 407                                        tvb, offset+1, 1, rel2);
 408         }
 409         offset += 2;
 410
 411         if (*direction == DIR_C2S) {
 412                 /* client to server */
 413                 guint16 qport = tvb_get_letohs(tvb, offset);
 414                 if (game_tree) {
 415                         proto_tree_add_uint(game_tree, hf_quake3_game_qport,
 416                                 tvb, offset, 2, qport);
 417                 }
 418                 offset +=2;
 419         }
 420
 421         /* all the rest is pure game data */
 422         rest_length = tvb_reported_length(tvb) - offset;
 423         if (rest_length) {
 424                 tvbuff_t *next_tvb =
 425                 tvb_new_subset(tvb, offset, rest_length , rest_length);
 426
 427                 if (*direction == DIR_C2S) {
 428                         proto_tree *c_tree = NULL;
 429                         if (tree) {
 430                                 proto_item *c_item;
 431                                 c_item = proto_tree_add_text(game_tree, next_tvb,
 432                                                              0, -1, "Client Commands");
 433                                 c_tree = proto_item_add_subtree(
 434                                         c_item, ett_quake3_game_clc);
 435                         }
 436                         dissect_quake3_client_commands(next_tvb, pinfo, c_tree);
 437                 }
 438                 else {
 439                         proto_tree *c_tree = NULL;
 440                         if (tree) {
 441                                 proto_item *c_item;
 442                                 c_item = proto_tree_add_text(game_tree, next_tvb,
 443                                                              0, -1, "Server Commands");
 444                                 c_tree = proto_item_add_subtree(
 445                                         c_item, ett_quake3_game_svc);
 446                         }
 447                         dissect_quake3_server_commands(next_tvb, pinfo, c_tree);
 448                 }
 449         }
 450 }
 451
 452
 453 static void
 454 dissect_quake3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 455 {
 456         proto_tree      *quake3_tree = NULL;
 457         proto_item      *dir_item = NULL;
 458         int             direction;
 459
 460         direction = DIR_UNKNOWN;
 461
 462         col_set_str(pinfo->cinfo, COL_PROTOCOL, "QUAKE3");
 463
 464         if (tree) {
 465                 proto_item *quake3_item;
 466                 quake3_item = proto_tree_add_item(tree, proto_quake3,
 467                                 tvb, 0, -1, ENC_NA);
 468                 quake3_tree = proto_item_add_subtree(quake3_item, ett_quake3);
 469
 470                 dir_item = proto_tree_add_none_format(
 471                         quake3_tree,
 472                         hf_quake3_direction, tvb, 0, 0,
 473                         "Direction: %s",
 474                         val_to_str(direction,
 475                                    names_direction, "%u"));
 476         }
 477
 478         if (tvb_get_ntohl(tvb, 0) == 0xffffffff) {
 479                 col_set_str(pinfo->cinfo, COL_INFO, "Connectionless ");
 480                 proto_tree_add_uint_format(quake3_tree,
 481                                 hf_quake3_connectionless,
 482                                 tvb, 0, 0, 1,
 483                                 "Type: Connectionless");
 484                 dissect_quake3_ConnectionlessPacket(
 485                         tvb, pinfo, quake3_tree, &direction);
 486         }
 487         else {
 488                 col_set_str(pinfo->cinfo, COL_INFO, "Game ");
 489                 proto_tree_add_uint_format(quake3_tree,
 490                                 hf_quake3_game,
 491                                 tvb, 0, 0, 1,
 492                                 "Type: Game");
 493                 dissect_quake3_GamePacket(
 494                         tvb, pinfo, quake3_tree, &direction);
 495         }
 496         if (direction != DIR_UNKNOWN && dir_item)
 497                 proto_item_set_text(dir_item,
 498                                         "Direction: %s",
 499                                         val_to_str(direction,
 500                                                 names_direction, "%u"));
 501
 502         col_append_str(pinfo->cinfo, COL_INFO, val_to_str(direction,
 503                         names_direction, "%u"));
 504 }
 505
 506
 507 void proto_reg_handoff_quake3(void);
 508
 509 void
 510 proto_register_quake3(void)
 511 {
 512         static hf_register_info hf[] = {
 513                 { &hf_quake3_direction,
 514                         { "Direction", "quake3.direction",
 515                         FT_NONE, BASE_NONE, NULL, 0x0,
 516                         "Packet Direction", HFILL }},
 517                 { &hf_quake3_connectionless,
 518                         { "Connectionless", "quake3.connectionless",
 519                         FT_UINT32, BASE_DEC, NULL, 0x0,
 520                         NULL, HFILL }},
 521                 { &hf_quake3_game,
 522                         { "Game", "quake3.game",
 523                         FT_UINT32, BASE_DEC, NULL, 0x0,
 524                         NULL, HFILL }},
 525                 { &hf_quake3_connectionless_marker,
 526                         { "Marker", "quake3.connectionless.marker",
 527                         FT_UINT32, BASE_HEX, NULL, 0x0,
 528                         NULL, HFILL }},
 529                 { &hf_quake3_connectionless_text,
 530                         { "Text", "quake3.connectionless.text",
 531                         FT_STRING, BASE_NONE, NULL, 0x0,
 532                         NULL, HFILL }},
 533                 { &hf_quake3_connectionless_command,
 534                         { "Command", "quake3.connectionless.command",
 535                         FT_STRING, BASE_NONE, NULL, 0x0,
 536                         NULL, HFILL }},
 537                 { &hf_quake3_server_addr,
 538                         { "Server Address", "quake3.server.addr",
 539                         FT_IPv4, BASE_NONE, NULL, 0x0,
 540                         "Server IP Address", HFILL }},
 541                 { &hf_quake3_server_port,
 542                         { "Server Port", "quake3.server.port",
 543                         FT_UINT16, BASE_DEC, NULL, 0x0,
 544                         "Server UDP Port", HFILL }},
 545                 { &hf_quake3_game_seq1,
 546                         { "Sequence Number", "quake3.game.seq1",
 547                         FT_UINT32, BASE_DEC, NULL, 0x0,
 548                         "Sequence number of the current packet", HFILL }},
 549                 { &hf_quake3_game_rel1,
 550                         { "Reliable", "quake3.game.rel1",
 551                         FT_BOOLEAN, BASE_NONE, NULL, 0x0,
 552                         "Packet is reliable and may be retransmitted", HFILL }},
 553                 { &hf_quake3_game_seq2,
 554                         { "Sequence Number", "quake3.game.seq2",
 555                         FT_UINT32, BASE_DEC, NULL, 0x0,
 556                         "Sequence number of the last received packet", HFILL }},
 557                 { &hf_quake3_game_rel2,
 558                         { "Reliable", "quake3.game.rel2",
 559                         FT_BOOLEAN, BASE_NONE, NULL, 0x0,
 560                         "Packet was reliable and may be retransmitted", HFILL }},
 561                 { &hf_quake3_game_qport,
 562                         { "QPort", "quake3.game.qport",
 563                         FT_UINT32, BASE_DEC, NULL, 0x0,
 564                         "Quake III Arena Client Port", HFILL }}
 565         };
 566         static gint *ett[] = {
 567                 &ett_quake3,
 568                 &ett_quake3_connectionless,
 569                 &ett_quake3_connectionless_text,
 570                 &ett_quake3_server,
 571                 &ett_quake3_game,
 572                 &ett_quake3_game_seq1,
 573                 &ett_quake3_game_seq2,
 574                 &ett_quake3_game_clc,
 575                 &ett_quake3_game_svc
 576         };
 577         module_t *quake3_module;
 578
 579         proto_quake3 = proto_register_protocol("Quake III Arena Network Protocol",
 580                                                 "QUAKE3", "quake3");
 581         proto_register_field_array(proto_quake3, hf, array_length(hf));
 582         proto_register_subtree_array(ett, array_length(ett));
 583
 584         /* Register a configuration option for port */
 585         quake3_module = prefs_register_protocol(proto_quake3,
 586                 proto_reg_handoff_quake3);
 587         prefs_register_uint_preference(quake3_module, "udp.arena_port",
 588                                         "Quake III Arena Server UDP Base Port",
 589                                         "Set the UDP base port for the Quake III Arena Server",
 590                                         10, &gbl_quake3_server_port);
 591         prefs_register_uint_preference(quake3_module, "udp.master_port",
 592                                         "Quake III Arena Master Server UDP Base Port",
 593                                         "Set the UDP base port for the Quake III Arena Master Server",
 594                                         10, &gbl_quake3_master_port);
 595 }
 596
 597
 598 void
 599 proto_reg_handoff_quake3(void)
 600 {
 601         static gboolean initialized=FALSE;
 602         static dissector_handle_t quake3_handle;
 603         static guint server_port;
 604         static guint master_port;
 605         int i;
 606
 607         if (!initialized) {
 608                 quake3_handle = create_dissector_handle(dissect_quake3,
 609                                 proto_quake3);
 610                 data_handle = find_dissector("data");
 611                 initialized=TRUE;
 612         } else {
 613                 for (i=0;i<4;i++)
 614                         dissector_delete_uint("udp.port", server_port+i, quake3_handle);
 615                 for (i=0;i<4;i++)
 616                         dissector_delete_uint("udp.port", master_port+i, quake3_handle);
 617         }
 618
 619         /* set port for future deletes */
 620         server_port = gbl_quake3_server_port;
 621         master_port = gbl_quake3_master_port;
 622
 623         /* add dissectors */
 624         for (i=0;i<4;i++)
 625                 dissector_add_uint("udp.port", gbl_quake3_server_port + i,
 626                         quake3_handle);
 627         for (i=0;i<4;i++)
 628                 dissector_add_uint("udp.port", gbl_quake3_master_port + i,
 629                         quake3_handle);
 630 }
 631
 632