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 1.4 2000/08/13 14:08:36 deniel Exp $
   8  *
   9  * Ethereal - Network traffic analyzer
  10  * By Gerald Combs <gerald@zing.org>
  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 "packet.h"
  44 #include "conversation.h"
  45
  46 static int proto_quake = -1;
  47 static int hf_quake_header_flags = -1;
  48 static int hf_quake_header_length = -1;
  49 static int hf_quake_header_sequence = -1;
  50 static int hf_quake_control_command = -1;
  51
  52 static int hf_quake_CCREQ_CONNECT_game = -1;
  53 static int hf_quake_CCREQ_CONNECT_version = -1;
  54 static int hf_quake_CCREQ_SERVER_INFO_game = -1;
  55 static int hf_quake_CCREQ_SERVER_INFO_version = -1;
  56 static int hf_quake_CCREQ_PLAYER_INFO_player = -1;
  57 static int hf_quake_CCREQ_RULE_INFO_lastrule = -1;
  58
  59 static int hf_quake_CCREP_ACCEPT_port = -1;
  60 static int hf_quake_CCREP_REJECT_reason = -1;
  61 static int hf_quake_CCREP_SERVER_INFO_address = -1;
  62 static int hf_quake_CCREP_SERVER_INFO_server = -1;
  63 static int hf_quake_CCREP_SERVER_INFO_map = -1;
  64 static int hf_quake_CCREP_SERVER_INFO_num_player = -1;
  65 static int hf_quake_CCREP_SERVER_INFO_max_player = -1;
  66 static int hf_quake_CCREP_PLAYER_INFO_name = -1;
  67 static int hf_quake_CCREP_PLAYER_INFO_colors = -1;
  68 static int hf_quake_CCREP_PLAYER_INFO_colors_shirt = -1;
  69 static int hf_quake_CCREP_PLAYER_INFO_colors_pants = -1;
  70 static int hf_quake_CCREP_PLAYER_INFO_frags = -1;
  71 static int hf_quake_CCREP_PLAYER_INFO_connect_time = -1;
  72 static int hf_quake_CCREP_PLAYER_INFO_address = -1;
  73 static int hf_quake_CCREP_RULE_INFO_rule = -1;
  74 static int hf_quake_CCREP_RULE_INFO_value = -1;
  75
  76
  77 static gint ett_quake = -1;
  78 static gint ett_quake_control = -1;
  79 static gint ett_quake_control_colors = -1;
  80 static gint ett_quake_flags = -1;
  81
  82
  83 /* I took these names directly out of the Q1 source. */
  84 #define NETFLAG_LENGTH_MASK 0x0000ffff
  85 #define NET_HEADERSIZE 8
  86 #define DEFAULTnet_hostport 26000
  87
  88 #define NETFLAG_LENGTH_MASK     0x0000ffff
  89 #define NETFLAG_DATA            0x00010000
  90 #define NETFLAG_ACK                     0x00020000
  91 #define NETFLAG_NAK                     0x00040000
  92 #define NETFLAG_EOM                     0x00080000
  93 #define NETFLAG_UNRELIABLE      0x00100000
  94 #define NETFLAG_CTL                     0x80000000
  95
  96
  97 #define CCREQ_CONNECT           0x01
  98 #define CCREQ_SERVER_INFO       0x02
  99 #define CCREQ_PLAYER_INFO       0x03
 100 #define CCREQ_RULE_INFO         0x04
 101
 102 #define CCREP_ACCEPT            0x81
 103 #define CCREP_REJECT            0x82
 104 #define CCREP_SERVER_INFO       0x83
 105 #define CCREP_PLAYER_INFO       0x84
 106 #define CCREP_RULE_INFO         0x85
 107
 108 static const value_string names_control_command[] = {
 109         {       CCREQ_CONNECT, "connect" },
 110         {       CCREQ_SERVER_INFO, "server_info" },
 111         {       CCREQ_PLAYER_INFO, "player_info" },
 112         {       CCREQ_RULE_INFO, "rule_info" },
 113         {       CCREP_ACCEPT, "accept" },
 114         {       CCREP_REJECT, "reject" },
 115         {       CCREP_SERVER_INFO, "server_info" },
 116         {       CCREP_PLAYER_INFO, "player_info" },
 117         {       CCREP_RULE_INFO, "rule_info" },
 118         { 0, NULL }
 119 };
 120
 121 #define CCREQ 0x00
 122 #define CCREP 0x80
 123
 124 #define QUAKE_MAXSTRING 0x800
 125
 126 static const value_string names_control_direction[] = {
 127         { CCREQ, "Request" },
 128         { CCREP, "Reply" },
 129         { 0, NULL }
 130 };
 131
 132
 133 static const value_string names_colors[] = {
 134         {  0, "White" },
 135         {  1, "Brown" },
 136         {  2, "Lavender" },
 137         {  3, "Khaki" },
 138         {  4, "Red" },
 139         {  5, "Lt Brown" },
 140         {  6, "Peach" },
 141         {  7, "Lt Peach" },
 142         {  8, "Purple" },
 143         {  9, "Dk Purple" },
 144         { 10, "Tan" },
 145         { 11, "Green" },
 146         { 12, "Yellow" },
 147         { 13, "Blue" },
 148         { 14, "Blue" },
 149         { 15, "Blue" },
 150         {  0, NULL }
 151 };
 152
 153
 154 static void dissect_quake(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
 155
 156
 157 static gint
 158 tvb_get_stringz(tvbuff_t *tvb, gint offset, gint maxlength, guint8* buffer)
 159 {
 160         int i;
 161         char* zeropos = NULL;
 162         gint stringlen = 0;
 163
 164         if (maxlength == 0) {
 165                 buffer[0] = 0;
 166                 return 0;
 167         }
 168
 169         tvb_memcpy(tvb, buffer, offset, maxlength);
 170         for (i=0 ; i<maxlength ; i++) {
 171                 if (buffer[i] == 0) {
 172                         stringlen = i;
 173                         zeropos = buffer+i;
 174                         break;
 175                 }
 176         }
 177         if (zeropos == NULL) {
 178                 buffer[maxlength-1] = 0;
 179                 return maxlength-1;
 180         }
 181         return stringlen;
 182 }
 183
 184
 185 static void
 186 dissect_quake_CCREQ_CONNECT
 187 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 188 {
 189         gint maxbufsize;
 190         char game[QUAKE_MAXSTRING];
 191         guint8 version;
 192         gint len;
 193
 194         maxbufsize = MIN(sizeof(game), tvb_length(tvb));
 195         len = tvb_get_stringz(tvb, 0, maxbufsize, game);
 196         version = tvb_get_guint8(tvb, len + 1);
 197
 198         if (tree) {
 199                 proto_tree_add_string(tree, hf_quake_CCREQ_CONNECT_game,
 200                         tvb, 0, len + 1, game);
 201                 proto_tree_add_uint(tree, hf_quake_CCREQ_CONNECT_version,
 202                         tvb, len + 1, 1, version);
 203         }
 204 }
 205
 206
 207 static void
 208 dissect_quake_CCREQ_SERVER_INFO
 209 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 210 {
 211         gint maxbufsize;
 212         char game[QUAKE_MAXSTRING];
 213         guint8 version;
 214         gint len;
 215
 216         maxbufsize = MIN(sizeof(game), tvb_length(tvb));
 217         len = tvb_get_stringz(tvb, 0, maxbufsize, game);
 218         version = tvb_get_guint8(tvb, len + 1);
 219
 220         if (tree) {
 221                 proto_tree_add_string(tree, hf_quake_CCREQ_SERVER_INFO_game,
 222                         tvb, 0, len + 1, game);
 223                 proto_tree_add_uint(tree, hf_quake_CCREQ_SERVER_INFO_version,
 224                         tvb, len + 1, 1, version);
 225         }
 226 }
 227
 228
 229 static void
 230 dissect_quake_CCREQ_PLAYER_INFO
 231 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 232 {
 233         guint8 player;
 234
 235         player = tvb_get_guint8(tvb, 0);
 236         if (tree) {
 237                  proto_tree_add_uint(tree, hf_quake_CCREQ_PLAYER_INFO_player,
 238                         tvb, 0, 1, player);
 239         }
 240 }
 241
 242
 243 static void
 244 dissect_quake_CCREQ_RULE_INFO
 245 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 246 {
 247         char rule[QUAKE_MAXSTRING];
 248         gint maxbufsize;
 249         gint len;
 250
 251         maxbufsize = MIN(sizeof(rule), tvb_length(tvb));
 252         len = tvb_get_stringz(tvb, 0, maxbufsize, rule);
 253         if (tree) {
 254                 proto_tree_add_string(tree, hf_quake_CCREQ_RULE_INFO_lastrule,
 255                         tvb, 0, len + 1, rule);
 256         }
 257 }
 258
 259
 260 static void
 261 dissect_quake_CCREP_ACCEPT
 262 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 263 {
 264         guint32 port;
 265         conversation_t *c;
 266
 267         port = tvb_get_letohl(tvb, 0);
 268         c = conversation_new( &pi.src, &pi.dst, PT_UDP, port, pi.destport, NULL);
 269         if (c) {
 270                 c->is_old_dissector = FALSE;
 271                 c->dissector.new = dissect_quake;
 272         }
 273         if (tree) {
 274                 proto_tree_add_uint(tree, hf_quake_CCREP_ACCEPT_port,
 275                         tvb, 0, 4, port);
 276         }
 277 }
 278
 279
 280 static void
 281 dissect_quake_CCREP_REJECT
 282 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 283 {
 284         gint maxbufsize;
 285         char reason[QUAKE_MAXSTRING];
 286         gint len;
 287
 288         maxbufsize = MIN(sizeof(reason), tvb_length(tvb));
 289         len = tvb_get_stringz(tvb, 0, maxbufsize, reason);
 290
 291         if (tree) {
 292                 proto_tree_add_string(tree, hf_quake_CCREP_REJECT_reason,
 293                         tvb, 0, len + 1, reason);
 294         }
 295 }
 296
 297
 298 static void
 299 dissect_quake_CCREP_SERVER_INFO
 300 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 301 {
 302         gint offset;
 303         gint len;
 304         gint maxbufsize;
 305         char address[QUAKE_MAXSTRING];
 306         char server[QUAKE_MAXSTRING];
 307         char map[QUAKE_MAXSTRING];
 308
 309         guint8 num_player;
 310         guint8 max_player;
 311         guint8 version;
 312
 313         offset = 0;
 314
 315         maxbufsize = MIN(sizeof(address), tvb_length_remaining(tvb, offset));
 316         len = tvb_get_stringz(tvb, offset, maxbufsize, address);
 317         if (tree) {
 318                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_address,
 319                         tvb, offset, len + 1, address);
 320         }
 321         offset += len + 1;
 322
 323         maxbufsize = MIN(sizeof(server), tvb_length_remaining(tvb, offset));
 324         len = tvb_get_stringz(tvb, offset, maxbufsize, server);
 325         if (tree) {
 326                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_server,
 327                         tvb, offset, len + 1, server);
 328         }
 329         offset += len + 1;
 330
 331         maxbufsize = MIN(sizeof(map), tvb_length_remaining(tvb, offset));
 332         len = tvb_get_stringz(tvb, offset, maxbufsize, map);
 333         if (tree) {
 334                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_map,
 335                         tvb, offset, len + 1, map);
 336         }
 337         offset += len + 1;
 338
 339         num_player = tvb_get_guint8(tvb, offset + 0);
 340         max_player = tvb_get_guint8(tvb, offset + 1);
 341         version    = tvb_get_guint8(tvb, offset + 2);
 342
 343         if (tree) {
 344                 proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_num_player,
 345                         tvb, offset + 0, 1, num_player);
 346                 proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_max_player,
 347                         tvb, offset + 1, 1, max_player);
 348                 proto_tree_add_uint(tree, hf_quake_CCREQ_SERVER_INFO_version,
 349                         tvb, offset + 2, 1, version);
 350         }
 351 }
 352
 353
 354 static void
 355 dissect_quake_CCREP_PLAYER_INFO
 356 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 357 {
 358         gint offset;
 359         guint8 player;
 360         gint len;
 361         gint maxbufsize;
 362         char name[QUAKE_MAXSTRING];
 363         guint32 colors;
 364         guint32 color_shirt;
 365         guint32 color_pants;
 366         guint32 frags;
 367         guint32 connect_time;
 368         char address[QUAKE_MAXSTRING];
 369
 370         offset = 0;
 371
 372         player = tvb_get_guint8(tvb, offset);
 373         if (tree) {
 374                 proto_tree_add_uint(tree, hf_quake_CCREQ_PLAYER_INFO_player,
 375                         tvb, offset, 1, player);
 376         }
 377         offset += 1;
 378
 379         maxbufsize = MIN(sizeof(name), tvb_length_remaining(tvb, offset));
 380         len = tvb_get_stringz(tvb, offset, maxbufsize, name);
 381         if (tree) {
 382                 proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_name,
 383                         tvb, offset, len + 1, name);
 384         }
 385         offset += len + 1;
 386
 387         colors       = tvb_get_letohl(tvb, offset + 0);
 388         color_shirt = (colors >> 4) & 0x0f;
 389         color_pants = (colors     ) & 0x0f;
 390         frags        = tvb_get_letohl(tvb, offset + 4);
 391         connect_time = tvb_get_letohl(tvb, offset + 8);
 392         if (tree) {
 393                 proto_item *colors_item;
 394                 proto_tree *colors_tree;
 395
 396                 colors_item = proto_tree_add_uint(tree,
 397                         hf_quake_CCREP_PLAYER_INFO_colors,
 398                         tvb, offset + 0, 4, colors);
 399                 if (colors_item) {
 400                         colors_tree = proto_item_add_subtree(colors_item,
 401                                         ett_quake_control_colors);
 402                         proto_tree_add_uint(colors_tree,
 403                                 hf_quake_CCREP_PLAYER_INFO_colors_shirt,
 404                                 tvb, offset + 0, 1, color_shirt);
 405                         proto_tree_add_uint(colors_tree,
 406                                 hf_quake_CCREP_PLAYER_INFO_colors_pants,
 407                                 tvb, offset + 0, 1, color_pants);
 408                 }
 409                 proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_frags,
 410                         tvb, offset + 4, 4, frags);
 411                 proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_connect_time,
 412                         tvb, offset + 8, 4, connect_time);
 413         }
 414         offset += 3*4;
 415
 416         maxbufsize = MIN(sizeof(address), tvb_length_remaining(tvb, offset));
 417         len = tvb_get_stringz(tvb, offset, maxbufsize, address);
 418         if (tree) {
 419                 proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_address,
 420                         tvb, offset, len + 1, address);
 421         }
 422         offset += len + 1;
 423 }
 424
 425
 426 static void
 427 dissect_quake_CCREP_RULE_INFO
 428 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 429 {
 430         char rule[QUAKE_MAXSTRING];
 431         char value[QUAKE_MAXSTRING];
 432         gint maxbufsize;
 433         gint len;
 434         gint offset;
 435
 436         if (tvb_length(tvb) == 0) return;
 437
 438         offset = 0;
 439
 440         maxbufsize = MIN(sizeof(rule), tvb_length_remaining(tvb, offset));
 441         len = tvb_get_stringz(tvb, offset, maxbufsize, rule);
 442         if (tree) {
 443                 proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_rule,
 444                         tvb, offset, len + 1, rule);
 445         }
 446         offset += len + 1;
 447
 448         maxbufsize = MIN(sizeof(value), tvb_length_remaining(tvb, offset));
 449         len = tvb_get_stringz(tvb, offset, maxbufsize, value);
 450         if (tree) {
 451                 proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_value,
 452                         tvb, offset, len + 1, value);
 453         }
 454         offset += len + 1;
 455 }
 456
 457
 458 static void
 459 dissect_quake_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 460 {
 461         guint8          command;
 462         int             direction;
 463         proto_item      *control_item = NULL;
 464         proto_tree      *control_tree = NULL;
 465         guint           rest_length;
 466         tvbuff_t        *next_tvb;
 467
 468         command = tvb_get_guint8(tvb, 0);
 469         direction = (command & 0x80) ? CCREP : CCREQ;
 470
 471         if (check_col(pinfo->fd, COL_INFO)) {
 472                 col_add_fstr(pinfo->fd, COL_INFO, "%s %s",
 473                         val_to_str(command,names_control_command, "%u"),
 474                         val_to_str(direction,names_control_direction,"%u"));
 475         }
 476
 477         if (tree) {
 478                 control_item = proto_tree_add_text(tree, tvb,
 479                                 0, tvb_length(tvb), "Control %s: %s",
 480                                 val_to_str(direction, names_control_direction, "%u"),
 481                                 val_to_str(command, names_control_command, "%u"));
 482                 if (control_item)
 483                         control_tree = proto_item_add_subtree(control_item,
 484                                                 ett_quake_control);
 485                 proto_tree_add_uint(control_tree, hf_quake_control_command,
 486                                         tvb, 0, 1, command);
 487         }
 488
 489         rest_length = tvb_reported_length(tvb) - 1;
 490         next_tvb = tvb_new_subset(tvb, 1, rest_length , rest_length);
 491         switch (command) {
 492                 case CCREQ_CONNECT:
 493                         dissect_quake_CCREQ_CONNECT
 494                         (next_tvb, pinfo, control_tree);
 495                 break;
 496                 case CCREQ_SERVER_INFO:
 497                         dissect_quake_CCREQ_SERVER_INFO
 498                         (next_tvb, pinfo, control_tree);
 499                 break;
 500                 case CCREQ_PLAYER_INFO:
 501                         dissect_quake_CCREQ_PLAYER_INFO
 502                         (next_tvb, pinfo, control_tree);
 503                 break;
 504                 case CCREQ_RULE_INFO:
 505                         dissect_quake_CCREQ_RULE_INFO
 506                         (next_tvb, pinfo, control_tree);
 507                 break;
 508                 case CCREP_ACCEPT:
 509                         dissect_quake_CCREP_ACCEPT
 510                         (next_tvb, pinfo, control_tree);
 511                 break;
 512                 case CCREP_REJECT:
 513                         dissect_quake_CCREP_REJECT
 514                         (next_tvb, pinfo, control_tree);
 515                 break;
 516                 case CCREP_SERVER_INFO:
 517                         dissect_quake_CCREP_SERVER_INFO
 518                         (next_tvb, pinfo, control_tree);
 519                 break;
 520                 case CCREP_PLAYER_INFO:
 521                         dissect_quake_CCREP_PLAYER_INFO
 522                         (next_tvb, pinfo, control_tree);
 523                 break;
 524                 case CCREP_RULE_INFO:
 525                         dissect_quake_CCREP_RULE_INFO
 526                         (next_tvb, pinfo, control_tree);
 527                 break;
 528                 default:
 529                         dissect_data(next_tvb, pinfo, control_tree);
 530                 break;
 531         }
 532 }
 533
 534
 535 static void
 536 dissect_quake(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 537 {
 538         proto_tree      *quake_tree = NULL;
 539         proto_item      *quake_item = NULL;
 540         guint32         length;
 541         guint32         flags;
 542         guint32         sequence = 0;
 543         guint           rest_length;
 544         tvbuff_t        *next_tvb;
 545
 546         CHECK_DISPLAY_AS_DATA(proto_quake, tvb, pinfo, tree);
 547
 548         if (!tvb_bytes_exist(tvb, 0, 4)) return;
 549
 550         length = tvb_get_ntohl(tvb, 0);
 551         flags = length & (~NETFLAG_LENGTH_MASK);
 552         length &= NETFLAG_LENGTH_MASK;
 553
 554         if (check_col(pinfo->fd, COL_PROTOCOL))
 555                 col_add_str(pinfo->fd, COL_PROTOCOL, "QUAKE");
 556
 557         if (tree) {
 558                 quake_item = proto_tree_add_item(tree, proto_quake,
 559                                 tvb, 0, tvb_length(tvb), FALSE);
 560                 if (quake_item)
 561                         quake_tree = proto_item_add_subtree(quake_item, ett_quake);
 562         }
 563
 564         if (quake_tree) {
 565                 proto_item* flags_item = NULL;
 566                 proto_tree* flags_tree = NULL;
 567
 568                 flags_item = proto_tree_add_uint(quake_tree, hf_quake_header_flags,
 569                         tvb, 0, 2, flags);
 570                 if (flags_item) {
 571                         flags_tree = proto_item_add_subtree(flags_item, ett_quake_flags);
 572                 }
 573
 574                 if (flags_tree) {
 575                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 576                                 decode_boolean_bitfield(flags, NETFLAG_DATA, 32,
 577                                 "Data","-"));
 578                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 579                                 decode_boolean_bitfield(flags, NETFLAG_ACK, 32,
 580                                 "Acknowledgment","-"));
 581                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 582                                 decode_boolean_bitfield(flags, NETFLAG_NAK, 32,
 583                                 "No Acknowledgment","-"));
 584                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 585                                 decode_boolean_bitfield(flags, NETFLAG_EOM, 32,
 586                                 "End Of Message","-"));
 587                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 588                                 decode_boolean_bitfield(flags, NETFLAG_UNRELIABLE, 32,
 589                                 "Unreliable","-"));
 590                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 591                                 decode_boolean_bitfield(flags, NETFLAG_CTL, 32,
 592                                 "Control","-"));
 593                 }
 594                 proto_tree_add_uint(quake_tree, hf_quake_header_length,
 595                         tvb, 2, 2, length);
 596         }
 597
 598         if (flags == NETFLAG_CTL) {
 599                 rest_length = tvb_reported_length(tvb) - 4;
 600                 next_tvb = tvb_new_subset(tvb, 4, rest_length , rest_length);
 601                 dissect_quake_control(next_tvb, pinfo, quake_tree);
 602                 return;
 603         }
 604
 605         sequence = tvb_get_ntohl(tvb, 4);
 606         if (check_col(pinfo->fd, COL_INFO)) {
 607                 col_add_fstr(pinfo->fd, COL_INFO, "seq 0x%x", sequence);
 608         }
 609         if (quake_tree) {
 610                 proto_tree_add_uint(quake_tree, hf_quake_header_sequence,
 611                         tvb, 4, 4, sequence);
 612         }
 613
 614         rest_length = tvb_reported_length(tvb) - 8;
 615         next_tvb = tvb_new_subset(tvb, 8, rest_length , rest_length);
 616         dissect_data(next_tvb, pinfo, quake_tree);
 617 }
 618
 619 void
 620 proto_register_quake(void)
 621 {
 622
 623   static hf_register_info hf[] = {
 624     { &hf_quake_header_flags,
 625       { "Flags", "quake.header.flags",
 626         FT_UINT16, BASE_HEX, NULL, 0x0,
 627         "Flags" }},
 628     { &hf_quake_header_length,
 629       { "Length", "quake.header.length",
 630         FT_UINT16, BASE_DEC, NULL, 0x0,
 631         "full data length" }},
 632     { &hf_quake_header_sequence,
 633       { "Sequence", "quake.header.sequence",
 634         FT_UINT32, BASE_HEX, NULL, 0x0,
 635         "Sequence Number" }},
 636     { &hf_quake_control_command,
 637       { "Command", "quake.control.command",
 638         FT_UINT8, BASE_HEX, VALS(names_control_command), 0x0,
 639         "Control Command" }},
 640     { &hf_quake_CCREQ_CONNECT_game,
 641       { "Game", "quake.control.connect.game",
 642         FT_STRING, BASE_DEC, NULL, 0x0,
 643         "Game Name" }},
 644     { &hf_quake_CCREQ_CONNECT_version,
 645       { "Version", "quake.control.connect.version",
 646         FT_UINT8, BASE_DEC, NULL, 0x0,
 647         "Game Protocol Version Number" }},
 648     { &hf_quake_CCREQ_SERVER_INFO_game,
 649       { "Game", "quake.control.server_info.game",
 650         FT_STRING, BASE_DEC, NULL, 0x0,
 651         "Game Name" }},
 652     { &hf_quake_CCREQ_SERVER_INFO_version,
 653       { "Version", "quake.control.server_info.version",
 654         FT_UINT8, BASE_DEC, NULL, 0x0,
 655         "Game Protocol Version Number" }},
 656     { &hf_quake_CCREQ_PLAYER_INFO_player,
 657       { "Player", "quake.control.player_info.player",
 658         FT_UINT8, BASE_DEC, NULL, 0x0,
 659         "Player" }},
 660     { &hf_quake_CCREQ_RULE_INFO_lastrule,
 661       { "Last Rule", "quake.control.rule_info.lastrule",
 662         FT_STRING, BASE_DEC, NULL, 0x0,
 663         "Last Rule Name" }},
 664     { &hf_quake_CCREP_ACCEPT_port,
 665       { "Port", "quake.control.accept.port",
 666         FT_UINT32, BASE_DEC, NULL, 0x0,
 667         "Game Data Port" }},
 668     { &hf_quake_CCREP_REJECT_reason,
 669       { "Reason", "quake.control.reject.reason",
 670         FT_STRING, BASE_DEC, NULL, 0x0,
 671         "Reject Reason" }},
 672     { &hf_quake_CCREP_SERVER_INFO_address,
 673       { "Address", "quake.control.server_info.address",
 674         FT_STRING, BASE_DEC, NULL, 0x0,
 675         "Server Address" }},
 676     { &hf_quake_CCREP_SERVER_INFO_server,
 677       { "Server", "quake.control.server_info.server",
 678         FT_STRING, BASE_DEC, NULL, 0x0,
 679         "Server Name" }},
 680     { &hf_quake_CCREP_SERVER_INFO_map,
 681       { "Map", "quake.control.server_info.map",
 682         FT_STRING, BASE_DEC, NULL, 0x0,
 683         "Map Name" }},
 684     { &hf_quake_CCREP_SERVER_INFO_num_player,
 685       { "Number of Players", "quake.control.server_info.num_player",
 686         FT_UINT8, BASE_DEC, NULL, 0x0,
 687         "Current Number of Players" }},
 688     { &hf_quake_CCREP_SERVER_INFO_max_player,
 689       { "Maximal Number of Players", "quake.control.server_info.max_player",
 690         FT_UINT8, BASE_DEC, NULL, 0x0,
 691         "Maximal Number of Players" }},
 692     { &hf_quake_CCREP_PLAYER_INFO_name,
 693       { "Name", "quake.control.player_info.name",
 694         FT_STRING, BASE_DEC, NULL, 0x0,
 695         "Player Name" }},
 696     { &hf_quake_CCREP_PLAYER_INFO_colors,
 697       { "Colors", "quake.control.player_info.colors",
 698         FT_UINT32, BASE_HEX, NULL, 0x0,
 699         "Player Colors" }},
 700     { &hf_quake_CCREP_PLAYER_INFO_colors_shirt,
 701       { "Shirt", "quake.control.player_info.colors.shirt",
 702         FT_UINT8, BASE_DEC, VALS(names_colors), 0x0,
 703         "Shirt Color" }},
 704     { &hf_quake_CCREP_PLAYER_INFO_colors_pants,
 705       { "Pants", "quake.control.player_info.colors.pants",
 706         FT_UINT8, BASE_DEC, VALS(names_colors), 0x0,
 707         "Pants Color" }},
 708     { &hf_quake_CCREP_PLAYER_INFO_frags,
 709       { "Frags", "quake.control.player_info.frags",
 710         FT_UINT32, BASE_DEC, NULL, 0x0,
 711         "Player Frags" }},
 712     { &hf_quake_CCREP_PLAYER_INFO_connect_time,
 713       { "Connect Time", "quake.control.player_info.connect_time",
 714         FT_UINT32, BASE_DEC, NULL, 0x0,
 715         "Player Connect Time" }},
 716     { &hf_quake_CCREP_PLAYER_INFO_address,
 717       { "Address", "quake.control.player_info.address",
 718         FT_STRING, BASE_DEC, NULL, 0x0,
 719         "Player Address" }},
 720     { &hf_quake_CCREP_RULE_INFO_rule,
 721       { "Rule", "quake.control.rule_info.rule",
 722         FT_STRING, BASE_DEC, NULL, 0x0,
 723         "Rule Name" }},
 724     { &hf_quake_CCREP_RULE_INFO_value,
 725       { "Value", "quake.control.rule_info.value",
 726         FT_STRING, BASE_DEC, NULL, 0x0,
 727         "Rule Value" }},
 728   };
 729   static gint *ett[] = {
 730     &ett_quake,
 731     &ett_quake_control,
 732     &ett_quake_control_colors,
 733     &ett_quake_flags,
 734   };
 735
 736   proto_quake = proto_register_protocol("Quake Network Protocol", "quake");
 737   proto_register_field_array(proto_quake, hf, array_length(hf));
 738   proto_register_subtree_array(ett, array_length(ett));
 739 }
 740
 741
 742 void
 743 proto_reg_handoff_quake(void)
 744 {
 745         dissector_add("udp.port", DEFAULTnet_hostport, dissect_quake);
 746 }