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: packet-quake3.c,v 1.12 2002/04/02 06:28:16 girlich Exp $
   7  *
   8  * Ethereal - Network traffic analyzer
   9  * By Gerald Combs <gerald@ethereal.com>
  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, 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 #ifdef HAVE_CONFIG_H
  41 # include "config.h"
  42 #endif
  43
  44 #ifdef HAVE_SYS_TYPES_H
  45 # include <sys/types.h>
  46 #endif
  47
  48 #include <string.h>
  49 #include <glib.h>
  50 #include <epan/packet.h>
  51 #include "prefs.h"
  52 #include <epan/resolv.h>
  53
  54 static int proto_quake3 = -1;
  55
  56 static int hf_quake3_direction = -1;
  57 static int hf_quake3_connectionless = -1;
  58 static int hf_quake3_game = -1;
  59 static int hf_quake3_connectionless_marker = -1;
  60 static int hf_quake3_connectionless_text = -1;
  61 static int hf_quake3_connectionless_command = -1;
  62 static int hf_quake3_server_addr = -1;
  63 static int hf_quake3_server_port = -1;
  64 static int hf_quake3_game_seq1 = -1;
  65 static int hf_quake3_game_rel1 = -1;
  66 static int hf_quake3_game_seq2 = -1;
  67 static int hf_quake3_game_rel2 = -1;
  68 static int hf_quake3_game_qport = -1;
  69
  70 static gint ett_quake3 = -1;
  71 static gint ett_quake3_connectionless = -1;
  72 static gint ett_quake3_connectionless_text = -1;
  73 static gint ett_quake3_server = -1;
  74 static gint ett_quake3_game = -1;
  75 static gint ett_quake3_game_seq1 = -1;
  76 static gint ett_quake3_game_seq2 = -1;
  77 static gint ett_quake3_game_clc = -1;
  78 static gint ett_quake3_game_svc = -1;
  79
  80 static dissector_handle_t data_handle;
  81
  82 #define QUAKE3_SERVER_PORT 27960
  83 #define QUAKE3_MASTER_PORT 27950
  84 static unsigned int gbl_quake3_server_port=QUAKE3_SERVER_PORT;
  85 static unsigned int gbl_quake3_master_port=QUAKE3_MASTER_PORT;
  86
  87
  88 static const value_string names_direction[] = {
  89 #define DIR_UNKNOWN 0
  90         { DIR_UNKNOWN, "Unknown" },
  91 #define DIR_C2S 1
  92         { DIR_C2S, "Client to Server" },
  93 #define DIR_S2C 2
  94         { DIR_S2C, "Server to Client" },
  95 #define DIR_C2M 3
  96         { DIR_C2M, "Client to Master" },
  97 #define DIR_M2C 4
  98         { DIR_M2C, "Master to Client" },
  99         { 0, NULL }
 100 };
 101
 102
 103 #define string_starts_with(s1, s2) (strncmp((s1), (s2), strlen(s2)) == 0)
 104
 105
 106 static const value_string names_command[] = {
 107 #define COMMAND_UNKNOWN                 0
 108         { COMMAND_UNKNOWN,              "Unknown" },
 109 #define COMMAND_statusResponse          1
 110         { COMMAND_statusResponse,       "Reply Status" },
 111 #define COMMAND_getstatus               2
 112         { COMMAND_getstatus,            "Request Status" },
 113 #define COMMAND_infoResponse            3
 114         { COMMAND_infoResponse,         "Reply Info" },
 115 #define COMMAND_getinfo                 4
 116         { COMMAND_getinfo,              "Request Info" },
 117 #define COMMAND_challengeResponse       5
 118         { COMMAND_challengeResponse,    "Reply Challenge" },
 119 #define COMMAND_getchallenge            6
 120         { COMMAND_getchallenge,         "Request Challenge" },
 121 #define COMMAND_connectResponse         7
 122         { COMMAND_connectResponse,      "Reply Connect" },
 123 #define COMMAND_connect                 8
 124         { COMMAND_connect,              "Request Connect" },
 125 #define COMMAND_rconResponse            9
 126         { COMMAND_rconResponse,         "Reply Remote Command" },
 127 #define COMMAND_rcon                    10
 128         { COMMAND_rcon,                 "Request Remote Command" },
 129 #define COMMAND_getmotdResponse         11
 130         { COMMAND_getmotdResponse,      "Reply Motto of the Day" },
 131 #define COMMAND_getmotd                 12
 132         { COMMAND_getmotd,              "Request Motto of the Day" },
 133 #define COMMAND_getserversResponse      13
 134         { COMMAND_getserversResponse,   "Reply Servers" },
 135 #define COMMAND_getservers              14
 136         { COMMAND_getservers,           "Request Servers" },
 137 #define COMMAND_getKeyAuthorize         15
 138         { COMMAND_getKeyAuthorize,      "Request Key Authorization" },
 139 #define COMMAND_getIpAuthorize          16
 140         { COMMAND_getIpAuthorize,       "Request IP Authorization" },
 141 #define COMMAND_ipAuthorize             17
 142         { COMMAND_ipAuthorize,          "Reply IP Authorization" },
 143         { 0, NULL }
 144 };
 145
 146
 147 static void
 148 dissect_quake3_ConnectionlessPacket(tvbuff_t *tvb, packet_info *pinfo _U_,
 149         proto_tree *tree, int* direction)
 150 {
 151         proto_tree      *cl_tree = NULL;
 152         proto_item      *cl_item = NULL;
 153         proto_item      *text_item = NULL;
 154         proto_tree      *text_tree = NULL;
 155         guint8          text[2048];
 156         int             maxbufsize = 0;
 157         int             len;
 158         int             offset;
 159         guint32         marker;
 160         int             command;
 161         int             command_len;
 162         int             command_finished = FALSE;
 163
 164         marker = tvb_get_ntohl(tvb, 0);
 165         if (tree) {
 166                 cl_item = proto_tree_add_text(tree, tvb,
 167                                 0, -1, "Connectionless");
 168                 if (cl_item)
 169                         cl_tree = proto_item_add_subtree(
 170                                 cl_item, ett_quake3_connectionless);
 171         }
 172
 173         if (cl_tree) {
 174                 proto_tree_add_uint(cl_tree, hf_quake3_connectionless_marker,
 175                                 tvb, 0, 4, marker);
 176         }
 177
 178         /* all the rest of the packet is just text */
 179         offset = 4;
 180
 181         maxbufsize = MIN((gint)sizeof(text), tvb_length_remaining(tvb, offset));
 182         len = tvb_get_nstringz0(tvb, offset, maxbufsize, text);
 183         if (cl_tree) {
 184                 text_item = proto_tree_add_string(cl_tree,
 185                                 hf_quake3_connectionless_text,
 186                                 tvb, offset, len + 1, text);
 187                 if (text_item) {
 188                         text_tree = proto_item_add_subtree(
 189                                         text_item,
 190                                         ett_quake3_connectionless_text);
 191                 }
 192         }
 193
 194         command = COMMAND_UNKNOWN;
 195         command_len = 0;
 196
 197         if (strncmp(text, "statusResponse", 14) == 0) {
 198                 command = COMMAND_statusResponse;
 199                 *direction = DIR_S2C;
 200                 command_len = 14;
 201         }
 202         else if (strncmp(text, "getstatus", 9) == 0) {
 203                 command = COMMAND_getstatus;
 204                 *direction = DIR_C2S;
 205                 command_len = 9;
 206         }
 207         else if (strncmp(text, "infoResponse", 12) == 0) {
 208                 command = COMMAND_infoResponse;
 209                 *direction = DIR_S2C;
 210                 command_len = 12;
 211         }
 212         else if (strncmp(text, "getinfo", 7) == 0) {
 213                 command = COMMAND_getinfo;
 214                 *direction = DIR_C2S;
 215                 command_len = 7;
 216         }
 217         else if (strncmp(text, "challengeResponse", 17) == 0) {
 218                 command = COMMAND_challengeResponse;
 219                 *direction = DIR_S2C;
 220                 command_len = 17;
 221         }
 222         else if (strncmp(text, "getchallenge", 12) == 0) {
 223                 command = COMMAND_getchallenge;
 224                 *direction = DIR_C2S;
 225                 command_len = 12;
 226         }
 227         else if (strncmp(text, "connectResponse", 15) == 0) {
 228                 command = COMMAND_connectResponse;
 229                 *direction = DIR_S2C;
 230                 command_len = 15;
 231         }
 232         else if (strncmp(text, "connect", 7) == 0) {
 233                 command = COMMAND_connect;
 234                 *direction = DIR_C2S;
 235                 command_len = 7;
 236         }
 237         else if (strncmp(text, "rconResponse", 12) == 0) {
 238                 command = COMMAND_rconResponse;
 239                 *direction = DIR_S2C;
 240                 command_len = 12;
 241         }
 242         else if (strncmp(text, "rcon", 4) == 0) {
 243                 command = COMMAND_rcon;
 244                 *direction = DIR_C2S;
 245                 command_len = 4;
 246         }
 247         else if (strncmp(text, "getmotdResponse", 15) == 0) {
 248                 command = COMMAND_getmotdResponse;
 249                 *direction = DIR_M2C;
 250                 command_len = 15;
 251         }
 252         else if (strncmp(text, "getmotd", 7) == 0) {
 253                 command = COMMAND_getmotd;
 254                 *direction = DIR_C2M;
 255                 command_len = 7;
 256         }
 257         else if (strncmp(text, "getserversResponse", 18) == 0) {
 258                 int base;
 259                 command = COMMAND_getserversResponse;
 260                 *direction = DIR_M2C;
 261                 command_len = 18;
 262                 /* The data can contain 0's, and the text string is binary
 263                 anyway, so better replace the text string after the first
 264                 \ with "<DATA>". */
 265                 if (text_item) {
 266                         /* first correct the length until the end of the packet */
 267                         proto_item_set_len(text_item, tvb_length_remaining(tvb, offset));
 268                         /* then replace the text */
 269                         proto_item_set_text(text_item, "Text: getserversResponse<DATA>");
 270                 }
 271                 if (text_tree)
 272                         proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
 273                                         tvb, offset, command_len,
 274                                         val_to_str(command, names_command, "Unknown"));
 275                 command_finished = TRUE;
 276
 277                 /* now we decode all the rest */
 278                 base = offset + 18;
 279                 /* '/', ip-address in network order, port in network order */
 280                 while (tvb_reported_length_remaining(tvb, base) >= 7) {
 281                         guint32         ip_addr;
 282                         guint16         udp_port;
 283                         proto_item      *server_item = NULL;
 284                         proto_tree      *server_tree = NULL;
 285
 286                         tvb_memcpy(tvb, (guint8 *)&ip_addr, base + 1, 4);
 287                         udp_port = tvb_get_ntohs(tvb, base + 5);
 288
 289                         /* It may be a good idea to create a conversation for
 290                                 every server in this list, as we'll see at
 291                                 least a getinfo request to each of them and they
 292                                 may run on totally unusual ports.  */
 293
 294                         if (text_tree) {
 295                                 server_item = proto_tree_add_text(text_tree,
 296                                         tvb, base, 7,
 297                                         "Server: %s:%u",
 298                                                 get_hostname(ip_addr),
 299                                                 udp_port);
 300                                 if (server_item)
 301                                         server_tree = proto_item_add_subtree(
 302                                                 server_item,
 303                                                 ett_quake3_server);
 304                         }
 305                         if (server_tree) {
 306                                 proto_tree_add_ipv4(server_tree, hf_quake3_server_addr,
 307                                         tvb, base + 1, 4, ip_addr);
 308                                 proto_tree_add_uint(server_tree, hf_quake3_server_port,
 309                                         tvb, base + 5, 2, udp_port);
 310                         }
 311
 312                         base += 7;
 313                 }
 314         }
 315         else if (strncmp(text, "getservers", 10) == 0) {
 316                 command = COMMAND_getservers;
 317                 *direction = DIR_C2M;
 318                 command_len = 10;
 319         }
 320         else if (strncmp(text, "getKeyAuthorize", 15) == 0) {
 321                 command = COMMAND_getKeyAuthorize;
 322                 *direction = DIR_C2M;
 323                 command_len = 15;
 324         }
 325         else if (strncmp(text, "getIpAuthorize", 14) == 0) {
 326                 command = COMMAND_getIpAuthorize;
 327                 *direction = DIR_C2M;
 328                 command_len = 14;
 329         }
 330         else if (strncmp(text, "ipAuthorize", 11) == 0) {
 331                 command = COMMAND_ipAuthorize;
 332                 *direction = DIR_M2C;
 333                 command_len = 11;
 334         }
 335         else {
 336                 *direction = DIR_UNKNOWN;
 337         }
 338
 339         if (text_tree && command_finished == FALSE) {
 340                 proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
 341                                         tvb, offset, command_len,
 342                                         val_to_str(command, names_command, "Unknown"));
 343         }
 344
 345         offset += len + 1;
 346
 347 }
 348
 349
 350 static void
 351 dissect_quake3_client_commands(tvbuff_t *tvb, packet_info *pinfo,
 352         proto_tree *tree)
 353 {
 354         /* this shouldn't be too difficult */
 355         call_dissector(data_handle,tvb, pinfo, tree);
 356 }
 357
 358
 359 static void
 360 dissect_quake3_server_commands(tvbuff_t *tvb, packet_info *pinfo,
 361         proto_tree *tree)
 362 {
 363         /* It is totally forbidden to decode this any further,
 364         I wont do it. */
 365         call_dissector(data_handle,tvb, pinfo, tree);
 366 }
 367
 368
 369 static const value_string names_reliable[] = {
 370         { 0, "Non Reliable" },
 371         { 1, "Reliable" },
 372         { 0, NULL }
 373 };
 374
 375
 376 static void
 377 dissect_quake3_GamePacket(tvbuff_t *tvb, packet_info *pinfo,
 378         proto_tree *tree, int *direction)
 379 {
 380         proto_tree      *game_tree = NULL;
 381         proto_item      *game_item = NULL;
 382         guint32         seq1;
 383         guint32         seq2;
 384         int             rel1;
 385         int             rel2;
 386         int             offset;
 387         guint           rest_length;
 388
 389         *direction = (pinfo->destport == gbl_quake3_server_port) ?
 390                         DIR_C2S : DIR_S2C;
 391
 392         if (tree) {
 393                 game_item = proto_tree_add_text(tree, tvb,
 394                                 0, -1, "Game");
 395                 if (game_item)
 396                         game_tree = proto_item_add_subtree(
 397                                 game_item, ett_quake3_game);
 398         }
 399
 400         offset = 0;
 401
 402         seq1 = tvb_get_letohs(tvb, offset);
 403         rel1 = seq1 & 0x8000 ? 1 : 0;
 404         seq1 &= ~0x8000;
 405         if (game_tree) {
 406                 proto_item *seq1_item = proto_tree_add_text(game_tree,
 407                         tvb, offset, 2, "Current Sequence: %u (%s)",
 408                         seq1, val_to_str(rel1,names_reliable,"%u"));
 409                 if (seq1_item) {
 410                         proto_tree *seq1_tree = proto_item_add_subtree(
 411                                 seq1_item, ett_quake3_game_seq1);
 412                         proto_tree_add_uint(seq1_tree, hf_quake3_game_seq1,
 413                                         tvb, offset, 2, seq1);
 414                         proto_tree_add_boolean(seq1_tree, hf_quake3_game_rel1,
 415                                         tvb, offset+1, 1, rel1);
 416                 }
 417         }
 418         offset += 2;
 419
 420         seq2 = tvb_get_letohs(tvb, offset);
 421         rel2 = seq2 & 0x8000 ? 1 : 0;
 422         seq2 &= ~0x8000;
 423         if (game_tree) {
 424                 proto_item *seq2_item = proto_tree_add_text(game_tree,
 425                         tvb, offset, 2, "Acknowledge Sequence: %u (%s)",
 426                         seq2, val_to_str(rel2,names_reliable,"%u"));;
 427                 if (seq2_item) {
 428                         proto_tree *seq2_tree = proto_item_add_subtree(
 429                                 seq2_item, ett_quake3_game_seq2);
 430                         proto_tree_add_uint(seq2_tree, hf_quake3_game_seq2,
 431                                         tvb, offset, 2, seq2);
 432                         proto_tree_add_boolean(seq2_tree, hf_quake3_game_rel2,
 433                                         tvb, offset+1, 1, rel2);
 434                 }
 435         }
 436         offset += 2;
 437
 438         if (*direction == DIR_C2S) {
 439                 /* client to server */
 440                 guint16 qport = tvb_get_letohs(tvb, offset);
 441                 if (game_tree) {
 442                         proto_tree_add_uint(game_tree, hf_quake3_game_qport,
 443                                 tvb, offset, 2, qport);
 444                 }
 445                 offset +=2;
 446         }
 447
 448         /* all the rest is pure game data */
 449         rest_length = tvb_reported_length(tvb) - offset;
 450         if (rest_length) {
 451                 tvbuff_t *next_tvb =
 452                 tvb_new_subset(tvb, offset, rest_length , rest_length);
 453
 454                 if (*direction == DIR_C2S) {
 455                         proto_item *c_item = NULL;
 456                         proto_tree *c_tree = NULL;
 457                         if (tree) {
 458                                 c_item = proto_tree_add_text(game_tree, next_tvb,
 459                                 0, -1, "Client Commands");
 460                                 if (c_item) {
 461                                         c_tree = proto_item_add_subtree(
 462                                                 c_item, ett_quake3_game_clc);
 463                                 }
 464                         }
 465                         dissect_quake3_client_commands(next_tvb, pinfo, c_tree);
 466                 }
 467                 else {
 468                         proto_item *c_item = NULL;
 469                         proto_tree *c_tree = NULL;
 470                         if (tree) {
 471                                 c_item = proto_tree_add_text(game_tree, next_tvb,
 472                                 0, -1, "Server Commands");
 473                                 if (c_item) {
 474                                         c_tree = proto_item_add_subtree(
 475                                         c_item, ett_quake3_game_svc);
 476                                 }
 477                         }
 478                         dissect_quake3_server_commands(next_tvb, pinfo, c_tree);
 479                 }
 480         }
 481 }
 482
 483
 484 static void
 485 dissect_quake3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 486 {
 487         proto_tree      *quake3_tree = NULL;
 488         proto_item      *quake3_item = NULL;
 489         proto_item      *dir_item = NULL;
 490         int             direction;
 491
 492         direction = DIR_UNKNOWN;
 493
 494         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 495                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "QUAKE3");
 496
 497         if (tree) {
 498                 quake3_item = proto_tree_add_item(tree, proto_quake3,
 499                                 tvb, 0, -1, FALSE);
 500                 if (quake3_item)
 501                         quake3_tree = proto_item_add_subtree(
 502                                 quake3_item, ett_quake3);
 503
 504                         if (quake3_tree) {
 505                                 dir_item = proto_tree_add_none_format(
 506                                         quake3_tree,
 507                                         hf_quake3_direction, tvb, 0, 0,
 508                                         "Direction: %s",
 509                                         val_to_str(direction,
 510                                                 names_direction, "%u"));
 511                         }
 512         }
 513
 514         if (tvb_get_ntohl(tvb, 0) == 0xffffffff) {
 515                 if (check_col(pinfo->cinfo, COL_INFO)) {
 516                         col_set_str(pinfo->cinfo, COL_INFO, "Connectionless ");
 517                 }
 518                 if (quake3_tree)
 519                         proto_tree_add_uint_format(quake3_tree,
 520                                 hf_quake3_connectionless,
 521                                 tvb, 0, 0, 1,
 522                                 "Type: Connectionless");
 523                 dissect_quake3_ConnectionlessPacket(
 524                         tvb, pinfo, quake3_tree, &direction);
 525         }
 526         else {
 527                 if (check_col(pinfo->cinfo, COL_INFO)) {
 528                         col_set_str(pinfo->cinfo, COL_INFO, "Game ");
 529                 }
 530                 if (quake3_tree)
 531                         proto_tree_add_uint_format(quake3_tree,
 532                                 hf_quake3_game,
 533                                 tvb, 0, 0, 1,
 534                                 "Type: Game");
 535                 dissect_quake3_GamePacket(
 536                         tvb, pinfo, quake3_tree, &direction);
 537         }
 538         if (direction != DIR_UNKNOWN && dir_item)
 539                 proto_item_set_text(dir_item,
 540                                         "Direction: %s",
 541                                         val_to_str(direction,
 542                                                 names_direction, "%u"));
 543
 544         if (check_col(pinfo->cinfo, COL_INFO))
 545                 col_append_str(pinfo->cinfo, COL_INFO, val_to_str(direction,
 546                         names_direction, "%u"));
 547 }
 548
 549
 550 void
 551 proto_reg_handoff_quake3(void)
 552 {
 553         static int initialized=FALSE;
 554         static dissector_handle_t quake3_handle;
 555         static int server_port;
 556         static int master_port;
 557         int i;
 558
 559         if (!initialized) {
 560                 quake3_handle = create_dissector_handle(dissect_quake3,
 561                                 proto_quake3);
 562                 initialized=TRUE;
 563         } else {
 564                 for (i=0;i<4;i++)
 565                         dissector_delete("udp.port", server_port+i, quake3_handle);
 566                 for (i=0;i<4;i++)
 567                         dissector_delete("udp.port", master_port+i, quake3_handle);
 568         }
 569
 570         /* set port for future deletes */
 571         server_port = gbl_quake3_server_port;
 572         master_port = gbl_quake3_master_port;
 573
 574         /* add dissectors */
 575         for (i=0;i<4;i++)
 576                 dissector_add("udp.port", gbl_quake3_server_port + i,
 577                         quake3_handle);
 578         for (i=0;i<4;i++)
 579                 dissector_add("udp.port", gbl_quake3_master_port + i,
 580                         quake3_handle);
 581         data_handle = find_dissector("data");
 582 }
 583
 584
 585 void
 586 proto_register_quake3(void)
 587 {
 588         static hf_register_info hf[] = {
 589                 { &hf_quake3_direction,
 590                         { "Direction", "quake3.direction",
 591                         FT_NONE, BASE_DEC, NULL, 0x0,
 592                         "Packet Direction", HFILL }},
 593                 { &hf_quake3_connectionless,
 594                         { "Connectionless", "quake3.connectionless",
 595                         FT_UINT32, BASE_DEC, NULL, 0x0,
 596                         "Connectionless", HFILL }},
 597                 { &hf_quake3_game,
 598                         { "Game", "quake3.game",
 599                         FT_UINT32, BASE_DEC, NULL, 0x0,
 600                         "Game", HFILL }},
 601                 { &hf_quake3_connectionless_marker,
 602                         { "Marker", "quake3.connectionless.marker",
 603                         FT_UINT32, BASE_HEX, NULL, 0x0,
 604                         "Marker", HFILL }},
 605                 { &hf_quake3_connectionless_text,
 606                         { "Text", "quake3.connectionless.text",
 607                         FT_STRING, BASE_DEC, NULL, 0x0,
 608                         "Text", HFILL }},
 609                 { &hf_quake3_connectionless_command,
 610                         { "Command", "quake3.connectionless.command",
 611                         FT_STRING, BASE_DEC, NULL, 0x0,
 612                         "Command", HFILL }},
 613                 { &hf_quake3_server_addr,
 614                         { "Server Address", "quake3.server.addr",
 615                         FT_IPv4, BASE_DEC, NULL, 0x0,
 616                         "Server IP Address", HFILL }},
 617                 { &hf_quake3_server_port,
 618                         { "Server Port", "quake3.server.port",
 619                         FT_UINT16, BASE_DEC, NULL, 0x0,
 620                         "Server UDP Port", HFILL }},
 621                 { &hf_quake3_game_seq1,
 622                         { "Sequence Number", "quake3.game.seq1",
 623                         FT_UINT32, BASE_DEC, NULL, 0x0,
 624                         "Sequence number of the current packet", HFILL }},
 625                 { &hf_quake3_game_rel1,
 626                         { "Reliable", "quake3.game.rel1",
 627                         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 628                         "Packet is reliable and may be retransmitted", HFILL }},
 629                 { &hf_quake3_game_seq2,
 630                         { "Sequence Number", "quake3.game.seq2",
 631                         FT_UINT32, BASE_DEC, NULL, 0x0,
 632                         "Sequence number of the last received packet", HFILL }},
 633                 { &hf_quake3_game_rel2,
 634                         { "Reliable", "quake3.game.rel2",
 635                         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 636                         "Packet was reliable and may be retransmitted", HFILL }},
 637                 { &hf_quake3_game_qport,
 638                         { "QPort", "quake3.game.qport",
 639                         FT_UINT32, BASE_DEC, NULL, 0x0,
 640                         "Quake III Arena Client Port", HFILL }}
 641         };
 642         static gint *ett[] = {
 643                 &ett_quake3,
 644                 &ett_quake3_connectionless,
 645                 &ett_quake3_connectionless_text,
 646                 &ett_quake3_server,
 647                 &ett_quake3_game,
 648                 &ett_quake3_game_seq1,
 649                 &ett_quake3_game_seq2,
 650                 &ett_quake3_game_clc,
 651                 &ett_quake3_game_svc
 652         };
 653         module_t *quake3_module;
 654
 655         proto_quake3 = proto_register_protocol("Quake III Arena Network Protocol",
 656                                                 "QUAKE3", "quake3");
 657         proto_register_field_array(proto_quake3, hf, array_length(hf));
 658         proto_register_subtree_array(ett, array_length(ett));
 659
 660         /* Register a configuration option for port */
 661         quake3_module = prefs_register_protocol(proto_quake3,
 662                 proto_reg_handoff_quake3);
 663         prefs_register_uint_preference(quake3_module, "udp.arena_port",
 664                                         "Quake III Arena Server UDP Base Port",
 665                                         "Set the UDP base port for the Quake III Arena Server",
 666                                         10, &gbl_quake3_server_port);
 667         prefs_register_uint_preference(quake3_module, "udp.master_port",
 668                                         "Quake III Arena Master Server UDP Base Port",
 669                                         "Set the UDP base port for the Quake III Arena Master Server",
 670                                         10, &gbl_quake3_master_port);
 671 }