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 1.14 2002/08/28 21:00:27 jmayer 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 #include <string.h>
  45 #include <glib.h>
  46 #include <epan/packet.h>
  47 #include "prefs.h"
  48 #include <epan/resolv.h>
  49
  50 static int proto_quake3 = -1;
  51
  52 static int hf_quake3_direction = -1;
  53 static int hf_quake3_connectionless = -1;
  54 static int hf_quake3_game = -1;
  55 static int hf_quake3_connectionless_marker = -1;
  56 static int hf_quake3_connectionless_text = -1;
  57 static int hf_quake3_connectionless_command = -1;
  58 static int hf_quake3_server_addr = -1;
  59 static int hf_quake3_server_port = -1;
  60 static int hf_quake3_game_seq1 = -1;
  61 static int hf_quake3_game_rel1 = -1;
  62 static int hf_quake3_game_seq2 = -1;
  63 static int hf_quake3_game_rel2 = -1;
  64 static int hf_quake3_game_qport = -1;
  65
  66 static gint ett_quake3 = -1;
  67 static gint ett_quake3_connectionless = -1;
  68 static gint ett_quake3_connectionless_text = -1;
  69 static gint ett_quake3_server = -1;
  70 static gint ett_quake3_game = -1;
  71 static gint ett_quake3_game_seq1 = -1;
  72 static gint ett_quake3_game_seq2 = -1;
  73 static gint ett_quake3_game_clc = -1;
  74 static gint ett_quake3_game_svc = -1;
  75
  76 static dissector_handle_t data_handle;
  77
  78 #define QUAKE3_SERVER_PORT 27960
  79 #define QUAKE3_MASTER_PORT 27950
  80 static unsigned int gbl_quake3_server_port=QUAKE3_SERVER_PORT;
  81 static unsigned int gbl_quake3_master_port=QUAKE3_MASTER_PORT;
  82
  83
  84 static const value_string names_direction[] = {
  85 #define DIR_UNKNOWN 0
  86         { DIR_UNKNOWN, "Unknown" },
  87 #define DIR_C2S 1
  88         { DIR_C2S, "Client to Server" },
  89 #define DIR_S2C 2
  90         { DIR_S2C, "Server to Client" },
  91 #define DIR_C2M 3
  92         { DIR_C2M, "Client to Master" },
  93 #define DIR_M2C 4
  94         { DIR_M2C, "Master to Client" },
  95         { 0, NULL }
  96 };
  97
  98
  99 #define string_starts_with(s1, s2) (strncmp((s1), (s2), strlen(s2)) == 0)
 100
 101
 102 static const value_string names_command[] = {
 103 #define COMMAND_UNKNOWN                 0
 104         { COMMAND_UNKNOWN,              "Unknown" },
 105 #define COMMAND_statusResponse          1
 106         { COMMAND_statusResponse,       "Reply Status" },
 107 #define COMMAND_getstatus               2
 108         { COMMAND_getstatus,            "Request Status" },
 109 #define COMMAND_infoResponse            3
 110         { COMMAND_infoResponse,         "Reply Info" },
 111 #define COMMAND_getinfo                 4
 112         { COMMAND_getinfo,              "Request Info" },
 113 #define COMMAND_challengeResponse       5
 114         { COMMAND_challengeResponse,    "Reply Challenge" },
 115 #define COMMAND_getchallenge            6
 116         { COMMAND_getchallenge,         "Request Challenge" },
 117 #define COMMAND_connectResponse         7
 118         { COMMAND_connectResponse,      "Reply Connect" },
 119 #define COMMAND_connect                 8
 120         { COMMAND_connect,              "Request Connect" },
 121 #define COMMAND_rconResponse            9
 122         { COMMAND_rconResponse,         "Reply Remote Command" },
 123 #define COMMAND_rcon                    10
 124         { COMMAND_rcon,                 "Request Remote Command" },
 125 #define COMMAND_getmotdResponse         11
 126         { COMMAND_getmotdResponse,      "Reply Motto of the Day" },
 127 #define COMMAND_getmotd                 12
 128         { COMMAND_getmotd,              "Request Motto of the Day" },
 129 #define COMMAND_getserversResponse      13
 130         { COMMAND_getserversResponse,   "Reply Servers" },
 131 #define COMMAND_getservers              14
 132         { COMMAND_getservers,           "Request Servers" },
 133 #define COMMAND_getKeyAuthorize         15
 134         { COMMAND_getKeyAuthorize,      "Request Key Authorization" },
 135 #define COMMAND_getIpAuthorize          16
 136         { COMMAND_getIpAuthorize,       "Request IP Authorization" },
 137 #define COMMAND_ipAuthorize             17
 138         { COMMAND_ipAuthorize,          "Reply IP Authorization" },
 139         { 0, NULL }
 140 };
 141
 142
 143 static void
 144 dissect_quake3_ConnectionlessPacket(tvbuff_t *tvb, packet_info *pinfo _U_,
 145         proto_tree *tree, int* direction)
 146 {
 147         proto_tree      *cl_tree = NULL;
 148         proto_item      *cl_item = NULL;
 149         proto_item      *text_item = NULL;
 150         proto_tree      *text_tree = NULL;
 151         guint8          text[2048];
 152         int             maxbufsize = 0;
 153         int             len;
 154         int             offset;
 155         guint32         marker;
 156         int             command;
 157         int             command_len;
 158         int             command_finished = FALSE;
 159
 160         marker = tvb_get_ntohl(tvb, 0);
 161         if (tree) {
 162                 cl_item = proto_tree_add_text(tree, tvb,
 163                                 0, -1, "Connectionless");
 164                 if (cl_item)
 165                         cl_tree = proto_item_add_subtree(
 166                                 cl_item, ett_quake3_connectionless);
 167         }
 168
 169         if (cl_tree) {
 170                 proto_tree_add_uint(cl_tree, hf_quake3_connectionless_marker,
 171                                 tvb, 0, 4, marker);
 172         }
 173
 174         /* all the rest of the packet is just text */
 175         offset = 4;
 176
 177         maxbufsize = MIN((gint)sizeof(text), tvb_length_remaining(tvb, offset));
 178         len = tvb_get_nstringz0(tvb, offset, maxbufsize, text);
 179         if (cl_tree) {
 180                 text_item = proto_tree_add_string(cl_tree,
 181                                 hf_quake3_connectionless_text,
 182                                 tvb, offset, len + 1, text);
 183                 if (text_item) {
 184                         text_tree = proto_item_add_subtree(
 185                                         text_item,
 186                                         ett_quake3_connectionless_text);
 187                 }
 188         }
 189
 190         command = COMMAND_UNKNOWN;
 191         command_len = 0;
 192
 193         if (strncmp(text, "statusResponse", 14) == 0) {
 194                 command = COMMAND_statusResponse;
 195                 *direction = DIR_S2C;
 196                 command_len = 14;
 197         }
 198         else if (strncmp(text, "getstatus", 9) == 0) {
 199                 command = COMMAND_getstatus;
 200                 *direction = DIR_C2S;
 201                 command_len = 9;
 202         }
 203         else if (strncmp(text, "infoResponse", 12) == 0) {
 204                 command = COMMAND_infoResponse;
 205                 *direction = DIR_S2C;
 206                 command_len = 12;
 207         }
 208         else if (strncmp(text, "getinfo", 7) == 0) {
 209                 command = COMMAND_getinfo;
 210                 *direction = DIR_C2S;
 211                 command_len = 7;
 212         }
 213         else if (strncmp(text, "challengeResponse", 17) == 0) {
 214                 command = COMMAND_challengeResponse;
 215                 *direction = DIR_S2C;
 216                 command_len = 17;
 217         }
 218         else if (strncmp(text, "getchallenge", 12) == 0) {
 219                 command = COMMAND_getchallenge;
 220                 *direction = DIR_C2S;
 221                 command_len = 12;
 222         }
 223         else if (strncmp(text, "connectResponse", 15) == 0) {
 224                 command = COMMAND_connectResponse;
 225                 *direction = DIR_S2C;
 226                 command_len = 15;
 227         }
 228         else if (strncmp(text, "connect", 7) == 0) {
 229                 command = COMMAND_connect;
 230                 *direction = DIR_C2S;
 231                 command_len = 7;
 232         }
 233         else if (strncmp(text, "rconResponse", 12) == 0) {
 234                 command = COMMAND_rconResponse;
 235                 *direction = DIR_S2C;
 236                 command_len = 12;
 237         }
 238         else if (strncmp(text, "rcon", 4) == 0) {
 239                 command = COMMAND_rcon;
 240                 *direction = DIR_C2S;
 241                 command_len = 4;
 242         }
 243         else if (strncmp(text, "getmotdResponse", 15) == 0) {
 244                 command = COMMAND_getmotdResponse;
 245                 *direction = DIR_M2C;
 246                 command_len = 15;
 247         }
 248         else if (strncmp(text, "getmotd", 7) == 0) {
 249                 command = COMMAND_getmotd;
 250                 *direction = DIR_C2M;
 251                 command_len = 7;
 252         }
 253         else if (strncmp(text, "getserversResponse", 18) == 0) {
 254                 int base;
 255                 command = COMMAND_getserversResponse;
 256                 *direction = DIR_M2C;
 257                 command_len = 18;
 258                 /* The data can contain 0's, and the text string is binary
 259                 anyway, so better replace the text string after the first
 260                 \ with "<DATA>". */
 261                 if (text_item) {
 262                         /* first correct the length until the end of the packet */
 263                         proto_item_set_len(text_item, tvb_length_remaining(tvb, offset));
 264                         /* then replace the text */
 265                         proto_item_set_text(text_item, "Text: getserversResponse<DATA>");
 266                 }
 267                 if (text_tree)
 268                         proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
 269                                         tvb, offset, command_len,
 270                                         val_to_str(command, names_command, "Unknown"));
 271                 command_finished = TRUE;
 272
 273                 /* now we decode all the rest */
 274                 base = offset + 18;
 275                 /* '/', ip-address in network order, port in network order */
 276                 while (tvb_reported_length_remaining(tvb, base) >= 7) {
 277                         guint32         ip_addr;
 278                         guint16         udp_port;
 279                         proto_item      *server_item = NULL;
 280                         proto_tree      *server_tree = NULL;
 281
 282                         tvb_memcpy(tvb, (guint8 *)&ip_addr, base + 1, 4);
 283                         udp_port = tvb_get_ntohs(tvb, base + 5);
 284
 285                         /* It may be a good idea to create a conversation for
 286                                 every server in this list, as we'll see at
 287                                 least a getinfo request to each of them and they
 288                                 may run on totally unusual ports.  */
 289
 290                         if (text_tree) {
 291                                 server_item = proto_tree_add_text(text_tree,
 292                                         tvb, base, 7,
 293                                         "Server: %s:%u",
 294                                                 get_hostname(ip_addr),
 295                                                 udp_port);
 296                                 if (server_item)
 297                                         server_tree = proto_item_add_subtree(
 298                                                 server_item,
 299                                                 ett_quake3_server);
 300                         }
 301                         if (server_tree) {
 302                                 proto_tree_add_ipv4(server_tree, hf_quake3_server_addr,
 303                                         tvb, base + 1, 4, ip_addr);
 304                                 proto_tree_add_uint(server_tree, hf_quake3_server_port,
 305                                         tvb, base + 5, 2, udp_port);
 306                         }
 307
 308                         base += 7;
 309                 }
 310         }
 311         else if (strncmp(text, "getservers", 10) == 0) {
 312                 command = COMMAND_getservers;
 313                 *direction = DIR_C2M;
 314                 command_len = 10;
 315         }
 316         else if (strncmp(text, "getKeyAuthorize", 15) == 0) {
 317                 command = COMMAND_getKeyAuthorize;
 318                 *direction = DIR_C2M;
 319                 command_len = 15;
 320         }
 321         else if (strncmp(text, "getIpAuthorize", 14) == 0) {
 322                 command = COMMAND_getIpAuthorize;
 323                 *direction = DIR_C2M;
 324                 command_len = 14;
 325         }
 326         else if (strncmp(text, "ipAuthorize", 11) == 0) {
 327                 command = COMMAND_ipAuthorize;
 328                 *direction = DIR_M2C;
 329                 command_len = 11;
 330         }
 331         else {
 332                 *direction = DIR_UNKNOWN;
 333         }
 334
 335         if (text_tree && command_finished == FALSE) {
 336                 proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
 337                                         tvb, offset, command_len,
 338                                         val_to_str(command, names_command, "Unknown"));
 339         }
 340
 341         offset += len + 1;
 342
 343 }
 344
 345
 346 static void
 347 dissect_quake3_client_commands(tvbuff_t *tvb, packet_info *pinfo,
 348         proto_tree *tree)
 349 {
 350         /* this shouldn't be too difficult */
 351         call_dissector(data_handle,tvb, pinfo, tree);
 352 }
 353
 354
 355 static void
 356 dissect_quake3_server_commands(tvbuff_t *tvb, packet_info *pinfo,
 357         proto_tree *tree)
 358 {
 359         /* It is totally forbidden to decode this any further,
 360         I wont do it. */
 361         call_dissector(data_handle,tvb, pinfo, tree);
 362 }
 363
 364
 365 static const value_string names_reliable[] = {
 366         { 0, "Non Reliable" },
 367         { 1, "Reliable" },
 368         { 0, NULL }
 369 };
 370
 371
 372 static void
 373 dissect_quake3_GamePacket(tvbuff_t *tvb, packet_info *pinfo,
 374         proto_tree *tree, int *direction)
 375 {
 376         proto_tree      *game_tree = NULL;
 377         proto_item      *game_item = NULL;
 378         guint32         seq1;
 379         guint32         seq2;
 380         int             rel1;
 381         int             rel2;
 382         int             offset;
 383         guint           rest_length;
 384
 385         *direction = (pinfo->destport == gbl_quake3_server_port) ?
 386                         DIR_C2S : DIR_S2C;
 387
 388         if (tree) {
 389                 game_item = proto_tree_add_text(tree, tvb,
 390                                 0, -1, "Game");
 391                 if (game_item)
 392                         game_tree = proto_item_add_subtree(
 393                                 game_item, ett_quake3_game);
 394         }
 395
 396         offset = 0;
 397
 398         seq1 = tvb_get_letohs(tvb, offset);
 399         rel1 = seq1 & 0x8000 ? 1 : 0;
 400         seq1 &= ~0x8000;
 401         if (game_tree) {
 402                 proto_item *seq1_item = proto_tree_add_text(game_tree,
 403                         tvb, offset, 2, "Current Sequence: %u (%s)",
 404                         seq1, val_to_str(rel1,names_reliable,"%u"));
 405                 if (seq1_item) {
 406                         proto_tree *seq1_tree = proto_item_add_subtree(
 407                                 seq1_item, ett_quake3_game_seq1);
 408                         proto_tree_add_uint(seq1_tree, hf_quake3_game_seq1,
 409                                         tvb, offset, 2, seq1);
 410                         proto_tree_add_boolean(seq1_tree, hf_quake3_game_rel1,
 411                                         tvb, offset+1, 1, rel1);
 412                 }
 413         }
 414         offset += 2;
 415
 416         seq2 = tvb_get_letohs(tvb, offset);
 417         rel2 = seq2 & 0x8000 ? 1 : 0;
 418         seq2 &= ~0x8000;
 419         if (game_tree) {
 420                 proto_item *seq2_item = proto_tree_add_text(game_tree,
 421                         tvb, offset, 2, "Acknowledge Sequence: %u (%s)",
 422                         seq2, val_to_str(rel2,names_reliable,"%u"));;
 423                 if (seq2_item) {
 424                         proto_tree *seq2_tree = proto_item_add_subtree(
 425                                 seq2_item, ett_quake3_game_seq2);
 426                         proto_tree_add_uint(seq2_tree, hf_quake3_game_seq2,
 427                                         tvb, offset, 2, seq2);
 428                         proto_tree_add_boolean(seq2_tree, hf_quake3_game_rel2,
 429                                         tvb, offset+1, 1, rel2);
 430                 }
 431         }
 432         offset += 2;
 433
 434         if (*direction == DIR_C2S) {
 435                 /* client to server */
 436                 guint16 qport = tvb_get_letohs(tvb, offset);
 437                 if (game_tree) {
 438                         proto_tree_add_uint(game_tree, hf_quake3_game_qport,
 439                                 tvb, offset, 2, qport);
 440                 }
 441                 offset +=2;
 442         }
 443
 444         /* all the rest is pure game data */
 445         rest_length = tvb_reported_length(tvb) - offset;
 446         if (rest_length) {
 447                 tvbuff_t *next_tvb =
 448                 tvb_new_subset(tvb, offset, rest_length , rest_length);
 449
 450                 if (*direction == DIR_C2S) {
 451                         proto_item *c_item = NULL;
 452                         proto_tree *c_tree = NULL;
 453                         if (tree) {
 454                                 c_item = proto_tree_add_text(game_tree, next_tvb,
 455                                 0, -1, "Client Commands");
 456                                 if (c_item) {
 457                                         c_tree = proto_item_add_subtree(
 458                                                 c_item, ett_quake3_game_clc);
 459                                 }
 460                         }
 461                         dissect_quake3_client_commands(next_tvb, pinfo, c_tree);
 462                 }
 463                 else {
 464                         proto_item *c_item = NULL;
 465                         proto_tree *c_tree = NULL;
 466                         if (tree) {
 467                                 c_item = proto_tree_add_text(game_tree, next_tvb,
 468                                 0, -1, "Server Commands");
 469                                 if (c_item) {
 470                                         c_tree = proto_item_add_subtree(
 471                                         c_item, ett_quake3_game_svc);
 472                                 }
 473                         }
 474                         dissect_quake3_server_commands(next_tvb, pinfo, c_tree);
 475                 }
 476         }
 477 }
 478
 479
 480 static void
 481 dissect_quake3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 482 {
 483         proto_tree      *quake3_tree = NULL;
 484         proto_item      *quake3_item = NULL;
 485         proto_item      *dir_item = NULL;
 486         int             direction;
 487
 488         direction = DIR_UNKNOWN;
 489
 490         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 491                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "QUAKE3");
 492
 493         if (tree) {
 494                 quake3_item = proto_tree_add_item(tree, proto_quake3,
 495                                 tvb, 0, -1, FALSE);
 496                 if (quake3_item)
 497                         quake3_tree = proto_item_add_subtree(
 498                                 quake3_item, ett_quake3);
 499
 500                         if (quake3_tree) {
 501                                 dir_item = proto_tree_add_none_format(
 502                                         quake3_tree,
 503                                         hf_quake3_direction, tvb, 0, 0,
 504                                         "Direction: %s",
 505                                         val_to_str(direction,
 506                                                 names_direction, "%u"));
 507                         }
 508         }
 509
 510         if (tvb_get_ntohl(tvb, 0) == 0xffffffff) {
 511                 if (check_col(pinfo->cinfo, COL_INFO)) {
 512                         col_set_str(pinfo->cinfo, COL_INFO, "Connectionless ");
 513                 }
 514                 if (quake3_tree)
 515                         proto_tree_add_uint_format(quake3_tree,
 516                                 hf_quake3_connectionless,
 517                                 tvb, 0, 0, 1,
 518                                 "Type: Connectionless");
 519                 dissect_quake3_ConnectionlessPacket(
 520                         tvb, pinfo, quake3_tree, &direction);
 521         }
 522         else {
 523                 if (check_col(pinfo->cinfo, COL_INFO)) {
 524                         col_set_str(pinfo->cinfo, COL_INFO, "Game ");
 525                 }
 526                 if (quake3_tree)
 527                         proto_tree_add_uint_format(quake3_tree,
 528                                 hf_quake3_game,
 529                                 tvb, 0, 0, 1,
 530                                 "Type: Game");
 531                 dissect_quake3_GamePacket(
 532                         tvb, pinfo, quake3_tree, &direction);
 533         }
 534         if (direction != DIR_UNKNOWN && dir_item)
 535                 proto_item_set_text(dir_item,
 536                                         "Direction: %s",
 537                                         val_to_str(direction,
 538                                                 names_direction, "%u"));
 539
 540         if (check_col(pinfo->cinfo, COL_INFO))
 541                 col_append_str(pinfo->cinfo, COL_INFO, val_to_str(direction,
 542                         names_direction, "%u"));
 543 }
 544
 545
 546 void
 547 proto_reg_handoff_quake3(void)
 548 {
 549         static int initialized=FALSE;
 550         static dissector_handle_t quake3_handle;
 551         static int server_port;
 552         static int master_port;
 553         int i;
 554
 555         if (!initialized) {
 556                 quake3_handle = create_dissector_handle(dissect_quake3,
 557                                 proto_quake3);
 558                 initialized=TRUE;
 559         } else {
 560                 for (i=0;i<4;i++)
 561                         dissector_delete("udp.port", server_port+i, quake3_handle);
 562                 for (i=0;i<4;i++)
 563                         dissector_delete("udp.port", master_port+i, quake3_handle);
 564         }
 565
 566         /* set port for future deletes */
 567         server_port = gbl_quake3_server_port;
 568         master_port = gbl_quake3_master_port;
 569
 570         /* add dissectors */
 571         for (i=0;i<4;i++)
 572                 dissector_add("udp.port", gbl_quake3_server_port + i,
 573                         quake3_handle);
 574         for (i=0;i<4;i++)
 575                 dissector_add("udp.port", gbl_quake3_master_port + i,
 576                         quake3_handle);
 577         data_handle = find_dissector("data");
 578 }
 579
 580
 581 void
 582 proto_register_quake3(void)
 583 {
 584         static hf_register_info hf[] = {
 585                 { &hf_quake3_direction,
 586                         { "Direction", "quake3.direction",
 587                         FT_NONE, BASE_DEC, NULL, 0x0,
 588                         "Packet Direction", HFILL }},
 589                 { &hf_quake3_connectionless,
 590                         { "Connectionless", "quake3.connectionless",
 591                         FT_UINT32, BASE_DEC, NULL, 0x0,
 592                         "Connectionless", HFILL }},
 593                 { &hf_quake3_game,
 594                         { "Game", "quake3.game",
 595                         FT_UINT32, BASE_DEC, NULL, 0x0,
 596                         "Game", HFILL }},
 597                 { &hf_quake3_connectionless_marker,
 598                         { "Marker", "quake3.connectionless.marker",
 599                         FT_UINT32, BASE_HEX, NULL, 0x0,
 600                         "Marker", HFILL }},
 601                 { &hf_quake3_connectionless_text,
 602                         { "Text", "quake3.connectionless.text",
 603                         FT_STRING, BASE_DEC, NULL, 0x0,
 604                         "Text", HFILL }},
 605                 { &hf_quake3_connectionless_command,
 606                         { "Command", "quake3.connectionless.command",
 607                         FT_STRING, BASE_DEC, NULL, 0x0,
 608                         "Command", HFILL }},
 609                 { &hf_quake3_server_addr,
 610                         { "Server Address", "quake3.server.addr",
 611                         FT_IPv4, BASE_DEC, NULL, 0x0,
 612                         "Server IP Address", HFILL }},
 613                 { &hf_quake3_server_port,
 614                         { "Server Port", "quake3.server.port",
 615                         FT_UINT16, BASE_DEC, NULL, 0x0,
 616                         "Server UDP Port", HFILL }},
 617                 { &hf_quake3_game_seq1,
 618                         { "Sequence Number", "quake3.game.seq1",
 619                         FT_UINT32, BASE_DEC, NULL, 0x0,
 620                         "Sequence number of the current packet", HFILL }},
 621                 { &hf_quake3_game_rel1,
 622                         { "Reliable", "quake3.game.rel1",
 623                         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 624                         "Packet is reliable and may be retransmitted", HFILL }},
 625                 { &hf_quake3_game_seq2,
 626                         { "Sequence Number", "quake3.game.seq2",
 627                         FT_UINT32, BASE_DEC, NULL, 0x0,
 628                         "Sequence number of the last received packet", HFILL }},
 629                 { &hf_quake3_game_rel2,
 630                         { "Reliable", "quake3.game.rel2",
 631                         FT_BOOLEAN, BASE_DEC, NULL, 0x0,
 632                         "Packet was reliable and may be retransmitted", HFILL }},
 633                 { &hf_quake3_game_qport,
 634                         { "QPort", "quake3.game.qport",
 635                         FT_UINT32, BASE_DEC, NULL, 0x0,
 636                         "Quake III Arena Client Port", HFILL }}
 637         };
 638         static gint *ett[] = {
 639                 &ett_quake3,
 640                 &ett_quake3_connectionless,
 641                 &ett_quake3_connectionless_text,
 642                 &ett_quake3_server,
 643                 &ett_quake3_game,
 644                 &ett_quake3_game_seq1,
 645                 &ett_quake3_game_seq2,
 646                 &ett_quake3_game_clc,
 647                 &ett_quake3_game_svc
 648         };
 649         module_t *quake3_module;
 650
 651         proto_quake3 = proto_register_protocol("Quake III Arena Network Protocol",
 652                                                 "QUAKE3", "quake3");
 653         proto_register_field_array(proto_quake3, hf, array_length(hf));
 654         proto_register_subtree_array(ett, array_length(ett));
 655
 656         /* Register a configuration option for port */
 657         quake3_module = prefs_register_protocol(proto_quake3,
 658                 proto_reg_handoff_quake3);
 659         prefs_register_uint_preference(quake3_module, "udp.arena_port",
 660                                         "Quake III Arena Server UDP Base Port",
 661                                         "Set the UDP base port for the Quake III Arena Server",
 662                                         10, &gbl_quake3_server_port);
 663         prefs_register_uint_preference(quake3_module, "udp.master_port",
 664                                         "Quake III Arena Master Server UDP Base Port",
 665                                         "Set the UDP base port for the Quake III Arena Master Server",
 666                                         10, &gbl_quake3_master_port);
 667 }