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 1.5 2000/08/21 18:36:34 guy 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                 conversation_set_dissector(c, dissect_quake);
 271         }
 272         if (tree) {
 273                 proto_tree_add_uint(tree, hf_quake_CCREP_ACCEPT_port,
 274                         tvb, 0, 4, port);
 275         }
 276 }
 277
 278
 279 static void
 280 dissect_quake_CCREP_REJECT
 281 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 282 {
 283         gint maxbufsize;
 284         char reason[QUAKE_MAXSTRING];
 285         gint len;
 286
 287         maxbufsize = MIN(sizeof(reason), tvb_length(tvb));
 288         len = tvb_get_stringz(tvb, 0, maxbufsize, reason);
 289
 290         if (tree) {
 291                 proto_tree_add_string(tree, hf_quake_CCREP_REJECT_reason,
 292                         tvb, 0, len + 1, reason);
 293         }
 294 }
 295
 296
 297 static void
 298 dissect_quake_CCREP_SERVER_INFO
 299 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 300 {
 301         gint offset;
 302         gint len;
 303         gint maxbufsize;
 304         char address[QUAKE_MAXSTRING];
 305         char server[QUAKE_MAXSTRING];
 306         char map[QUAKE_MAXSTRING];
 307
 308         guint8 num_player;
 309         guint8 max_player;
 310         guint8 version;
 311
 312         offset = 0;
 313
 314         maxbufsize = MIN(sizeof(address), tvb_length_remaining(tvb, offset));
 315         len = tvb_get_stringz(tvb, offset, maxbufsize, address);
 316         if (tree) {
 317                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_address,
 318                         tvb, offset, len + 1, address);
 319         }
 320         offset += len + 1;
 321
 322         maxbufsize = MIN(sizeof(server), tvb_length_remaining(tvb, offset));
 323         len = tvb_get_stringz(tvb, offset, maxbufsize, server);
 324         if (tree) {
 325                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_server,
 326                         tvb, offset, len + 1, server);
 327         }
 328         offset += len + 1;
 329
 330         maxbufsize = MIN(sizeof(map), tvb_length_remaining(tvb, offset));
 331         len = tvb_get_stringz(tvb, offset, maxbufsize, map);
 332         if (tree) {
 333                 proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_map,
 334                         tvb, offset, len + 1, map);
 335         }
 336         offset += len + 1;
 337
 338         num_player = tvb_get_guint8(tvb, offset + 0);
 339         max_player = tvb_get_guint8(tvb, offset + 1);
 340         version    = tvb_get_guint8(tvb, offset + 2);
 341
 342         if (tree) {
 343                 proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_num_player,
 344                         tvb, offset + 0, 1, num_player);
 345                 proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_max_player,
 346                         tvb, offset + 1, 1, max_player);
 347                 proto_tree_add_uint(tree, hf_quake_CCREQ_SERVER_INFO_version,
 348                         tvb, offset + 2, 1, version);
 349         }
 350 }
 351
 352
 353 static void
 354 dissect_quake_CCREP_PLAYER_INFO
 355 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 356 {
 357         gint offset;
 358         guint8 player;
 359         gint len;
 360         gint maxbufsize;
 361         char name[QUAKE_MAXSTRING];
 362         guint32 colors;
 363         guint32 color_shirt;
 364         guint32 color_pants;
 365         guint32 frags;
 366         guint32 connect_time;
 367         char address[QUAKE_MAXSTRING];
 368
 369         offset = 0;
 370
 371         player = tvb_get_guint8(tvb, offset);
 372         if (tree) {
 373                 proto_tree_add_uint(tree, hf_quake_CCREQ_PLAYER_INFO_player,
 374                         tvb, offset, 1, player);
 375         }
 376         offset += 1;
 377
 378         maxbufsize = MIN(sizeof(name), tvb_length_remaining(tvb, offset));
 379         len = tvb_get_stringz(tvb, offset, maxbufsize, name);
 380         if (tree) {
 381                 proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_name,
 382                         tvb, offset, len + 1, name);
 383         }
 384         offset += len + 1;
 385
 386         colors       = tvb_get_letohl(tvb, offset + 0);
 387         color_shirt = (colors >> 4) & 0x0f;
 388         color_pants = (colors     ) & 0x0f;
 389         frags        = tvb_get_letohl(tvb, offset + 4);
 390         connect_time = tvb_get_letohl(tvb, offset + 8);
 391         if (tree) {
 392                 proto_item *colors_item;
 393                 proto_tree *colors_tree;
 394
 395                 colors_item = proto_tree_add_uint(tree,
 396                         hf_quake_CCREP_PLAYER_INFO_colors,
 397                         tvb, offset + 0, 4, colors);
 398                 if (colors_item) {
 399                         colors_tree = proto_item_add_subtree(colors_item,
 400                                         ett_quake_control_colors);
 401                         proto_tree_add_uint(colors_tree,
 402                                 hf_quake_CCREP_PLAYER_INFO_colors_shirt,
 403                                 tvb, offset + 0, 1, color_shirt);
 404                         proto_tree_add_uint(colors_tree,
 405                                 hf_quake_CCREP_PLAYER_INFO_colors_pants,
 406                                 tvb, offset + 0, 1, color_pants);
 407                 }
 408                 proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_frags,
 409                         tvb, offset + 4, 4, frags);
 410                 proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_connect_time,
 411                         tvb, offset + 8, 4, connect_time);
 412         }
 413         offset += 3*4;
 414
 415         maxbufsize = MIN(sizeof(address), tvb_length_remaining(tvb, offset));
 416         len = tvb_get_stringz(tvb, offset, maxbufsize, address);
 417         if (tree) {
 418                 proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_address,
 419                         tvb, offset, len + 1, address);
 420         }
 421         offset += len + 1;
 422 }
 423
 424
 425 static void
 426 dissect_quake_CCREP_RULE_INFO
 427 (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 428 {
 429         char rule[QUAKE_MAXSTRING];
 430         char value[QUAKE_MAXSTRING];
 431         gint maxbufsize;
 432         gint len;
 433         gint offset;
 434
 435         if (tvb_length(tvb) == 0) return;
 436
 437         offset = 0;
 438
 439         maxbufsize = MIN(sizeof(rule), tvb_length_remaining(tvb, offset));
 440         len = tvb_get_stringz(tvb, offset, maxbufsize, rule);
 441         if (tree) {
 442                 proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_rule,
 443                         tvb, offset, len + 1, rule);
 444         }
 445         offset += len + 1;
 446
 447         maxbufsize = MIN(sizeof(value), tvb_length_remaining(tvb, offset));
 448         len = tvb_get_stringz(tvb, offset, maxbufsize, value);
 449         if (tree) {
 450                 proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_value,
 451                         tvb, offset, len + 1, value);
 452         }
 453         offset += len + 1;
 454 }
 455
 456
 457 static void
 458 dissect_quake_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 459 {
 460         guint8          command;
 461         int             direction;
 462         proto_item      *control_item = NULL;
 463         proto_tree      *control_tree = NULL;
 464         guint           rest_length;
 465         tvbuff_t        *next_tvb;
 466
 467         command = tvb_get_guint8(tvb, 0);
 468         direction = (command & 0x80) ? CCREP : CCREQ;
 469
 470         if (check_col(pinfo->fd, COL_INFO)) {
 471                 col_add_fstr(pinfo->fd, COL_INFO, "%s %s",
 472                         val_to_str(command,names_control_command, "%u"),
 473                         val_to_str(direction,names_control_direction,"%u"));
 474         }
 475
 476         if (tree) {
 477                 control_item = proto_tree_add_text(tree, tvb,
 478                                 0, tvb_length(tvb), "Control %s: %s",
 479                                 val_to_str(direction, names_control_direction, "%u"),
 480                                 val_to_str(command, names_control_command, "%u"));
 481                 if (control_item)
 482                         control_tree = proto_item_add_subtree(control_item,
 483                                                 ett_quake_control);
 484                 proto_tree_add_uint(control_tree, hf_quake_control_command,
 485                                         tvb, 0, 1, command);
 486         }
 487
 488         rest_length = tvb_reported_length(tvb) - 1;
 489         next_tvb = tvb_new_subset(tvb, 1, rest_length , rest_length);
 490         switch (command) {
 491                 case CCREQ_CONNECT:
 492                         dissect_quake_CCREQ_CONNECT
 493                         (next_tvb, pinfo, control_tree);
 494                 break;
 495                 case CCREQ_SERVER_INFO:
 496                         dissect_quake_CCREQ_SERVER_INFO
 497                         (next_tvb, pinfo, control_tree);
 498                 break;
 499                 case CCREQ_PLAYER_INFO:
 500                         dissect_quake_CCREQ_PLAYER_INFO
 501                         (next_tvb, pinfo, control_tree);
 502                 break;
 503                 case CCREQ_RULE_INFO:
 504                         dissect_quake_CCREQ_RULE_INFO
 505                         (next_tvb, pinfo, control_tree);
 506                 break;
 507                 case CCREP_ACCEPT:
 508                         dissect_quake_CCREP_ACCEPT
 509                         (next_tvb, pinfo, control_tree);
 510                 break;
 511                 case CCREP_REJECT:
 512                         dissect_quake_CCREP_REJECT
 513                         (next_tvb, pinfo, control_tree);
 514                 break;
 515                 case CCREP_SERVER_INFO:
 516                         dissect_quake_CCREP_SERVER_INFO
 517                         (next_tvb, pinfo, control_tree);
 518                 break;
 519                 case CCREP_PLAYER_INFO:
 520                         dissect_quake_CCREP_PLAYER_INFO
 521                         (next_tvb, pinfo, control_tree);
 522                 break;
 523                 case CCREP_RULE_INFO:
 524                         dissect_quake_CCREP_RULE_INFO
 525                         (next_tvb, pinfo, control_tree);
 526                 break;
 527                 default:
 528                         dissect_data(next_tvb, pinfo, control_tree);
 529                 break;
 530         }
 531 }
 532
 533
 534 static void
 535 dissect_quake(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 536 {
 537         proto_tree      *quake_tree = NULL;
 538         proto_item      *quake_item = NULL;
 539         guint32         length;
 540         guint32         flags;
 541         guint32         sequence = 0;
 542         guint           rest_length;
 543         tvbuff_t        *next_tvb;
 544
 545         CHECK_DISPLAY_AS_DATA(proto_quake, tvb, pinfo, tree);
 546
 547         if (!tvb_bytes_exist(tvb, 0, 4)) return;
 548
 549         length = tvb_get_ntohl(tvb, 0);
 550         flags = length & (~NETFLAG_LENGTH_MASK);
 551         length &= NETFLAG_LENGTH_MASK;
 552
 553         if (check_col(pinfo->fd, COL_PROTOCOL))
 554                 col_add_str(pinfo->fd, COL_PROTOCOL, "QUAKE");
 555
 556         if (tree) {
 557                 quake_item = proto_tree_add_item(tree, proto_quake,
 558                                 tvb, 0, tvb_length(tvb), FALSE);
 559                 if (quake_item)
 560                         quake_tree = proto_item_add_subtree(quake_item, ett_quake);
 561         }
 562
 563         if (quake_tree) {
 564                 proto_item* flags_item = NULL;
 565                 proto_tree* flags_tree = NULL;
 566
 567                 flags_item = proto_tree_add_uint(quake_tree, hf_quake_header_flags,
 568                         tvb, 0, 2, flags);
 569                 if (flags_item) {
 570                         flags_tree = proto_item_add_subtree(flags_item, ett_quake_flags);
 571                 }
 572
 573                 if (flags_tree) {
 574                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 575                                 decode_boolean_bitfield(flags, NETFLAG_DATA, 32,
 576                                 "Data","-"));
 577                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 578                                 decode_boolean_bitfield(flags, NETFLAG_ACK, 32,
 579                                 "Acknowledgment","-"));
 580                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 581                                 decode_boolean_bitfield(flags, NETFLAG_NAK, 32,
 582                                 "No Acknowledgment","-"));
 583                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 584                                 decode_boolean_bitfield(flags, NETFLAG_EOM, 32,
 585                                 "End Of Message","-"));
 586                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 587                                 decode_boolean_bitfield(flags, NETFLAG_UNRELIABLE, 32,
 588                                 "Unreliable","-"));
 589                         proto_tree_add_text(flags_tree, tvb, 0, 2,
 590                                 decode_boolean_bitfield(flags, NETFLAG_CTL, 32,
 591                                 "Control","-"));
 592                 }
 593                 proto_tree_add_uint(quake_tree, hf_quake_header_length,
 594                         tvb, 2, 2, length);
 595         }
 596
 597         if (flags == NETFLAG_CTL) {
 598                 rest_length = tvb_reported_length(tvb) - 4;
 599                 next_tvb = tvb_new_subset(tvb, 4, rest_length , rest_length);
 600                 dissect_quake_control(next_tvb, pinfo, quake_tree);
 601                 return;
 602         }
 603
 604         sequence = tvb_get_ntohl(tvb, 4);
 605         if (check_col(pinfo->fd, COL_INFO)) {
 606                 col_add_fstr(pinfo->fd, COL_INFO, "seq 0x%x", sequence);
 607         }
 608         if (quake_tree) {
 609                 proto_tree_add_uint(quake_tree, hf_quake_header_sequence,
 610                         tvb, 4, 4, sequence);
 611         }
 612
 613         rest_length = tvb_reported_length(tvb) - 8;
 614         next_tvb = tvb_new_subset(tvb, 8, rest_length , rest_length);
 615         dissect_data(next_tvb, pinfo, quake_tree);
 616 }
 617
 618 void
 619 proto_register_quake(void)
 620 {
 621
 622   static hf_register_info hf[] = {
 623     { &hf_quake_header_flags,
 624       { "Flags", "quake.header.flags",
 625         FT_UINT16, BASE_HEX, NULL, 0x0,
 626         "Flags" }},
 627     { &hf_quake_header_length,
 628       { "Length", "quake.header.length",
 629         FT_UINT16, BASE_DEC, NULL, 0x0,
 630         "full data length" }},
 631     { &hf_quake_header_sequence,
 632       { "Sequence", "quake.header.sequence",
 633         FT_UINT32, BASE_HEX, NULL, 0x0,
 634         "Sequence Number" }},
 635     { &hf_quake_control_command,
 636       { "Command", "quake.control.command",
 637         FT_UINT8, BASE_HEX, VALS(names_control_command), 0x0,
 638         "Control Command" }},
 639     { &hf_quake_CCREQ_CONNECT_game,
 640       { "Game", "quake.control.connect.game",
 641         FT_STRING, BASE_DEC, NULL, 0x0,
 642         "Game Name" }},
 643     { &hf_quake_CCREQ_CONNECT_version,
 644       { "Version", "quake.control.connect.version",
 645         FT_UINT8, BASE_DEC, NULL, 0x0,
 646         "Game Protocol Version Number" }},
 647     { &hf_quake_CCREQ_SERVER_INFO_game,
 648       { "Game", "quake.control.server_info.game",
 649         FT_STRING, BASE_DEC, NULL, 0x0,
 650         "Game Name" }},
 651     { &hf_quake_CCREQ_SERVER_INFO_version,
 652       { "Version", "quake.control.server_info.version",
 653         FT_UINT8, BASE_DEC, NULL, 0x0,
 654         "Game Protocol Version Number" }},
 655     { &hf_quake_CCREQ_PLAYER_INFO_player,
 656       { "Player", "quake.control.player_info.player",
 657         FT_UINT8, BASE_DEC, NULL, 0x0,
 658         "Player" }},
 659     { &hf_quake_CCREQ_RULE_INFO_lastrule,
 660       { "Last Rule", "quake.control.rule_info.lastrule",
 661         FT_STRING, BASE_DEC, NULL, 0x0,
 662         "Last Rule Name" }},
 663     { &hf_quake_CCREP_ACCEPT_port,
 664       { "Port", "quake.control.accept.port",
 665         FT_UINT32, BASE_DEC, NULL, 0x0,
 666         "Game Data Port" }},
 667     { &hf_quake_CCREP_REJECT_reason,
 668       { "Reason", "quake.control.reject.reason",
 669         FT_STRING, BASE_DEC, NULL, 0x0,
 670         "Reject Reason" }},
 671     { &hf_quake_CCREP_SERVER_INFO_address,
 672       { "Address", "quake.control.server_info.address",
 673         FT_STRING, BASE_DEC, NULL, 0x0,
 674         "Server Address" }},
 675     { &hf_quake_CCREP_SERVER_INFO_server,
 676       { "Server", "quake.control.server_info.server",
 677         FT_STRING, BASE_DEC, NULL, 0x0,
 678         "Server Name" }},
 679     { &hf_quake_CCREP_SERVER_INFO_map,
 680       { "Map", "quake.control.server_info.map",
 681         FT_STRING, BASE_DEC, NULL, 0x0,
 682         "Map Name" }},
 683     { &hf_quake_CCREP_SERVER_INFO_num_player,
 684       { "Number of Players", "quake.control.server_info.num_player",
 685         FT_UINT8, BASE_DEC, NULL, 0x0,
 686         "Current Number of Players" }},
 687     { &hf_quake_CCREP_SERVER_INFO_max_player,
 688       { "Maximal Number of Players", "quake.control.server_info.max_player",
 689         FT_UINT8, BASE_DEC, NULL, 0x0,
 690         "Maximal Number of Players" }},
 691     { &hf_quake_CCREP_PLAYER_INFO_name,
 692       { "Name", "quake.control.player_info.name",
 693         FT_STRING, BASE_DEC, NULL, 0x0,
 694         "Player Name" }},
 695     { &hf_quake_CCREP_PLAYER_INFO_colors,
 696       { "Colors", "quake.control.player_info.colors",
 697         FT_UINT32, BASE_HEX, NULL, 0x0,
 698         "Player Colors" }},
 699     { &hf_quake_CCREP_PLAYER_INFO_colors_shirt,
 700       { "Shirt", "quake.control.player_info.colors.shirt",
 701         FT_UINT8, BASE_DEC, VALS(names_colors), 0x0,
 702         "Shirt Color" }},
 703     { &hf_quake_CCREP_PLAYER_INFO_colors_pants,
 704       { "Pants", "quake.control.player_info.colors.pants",
 705         FT_UINT8, BASE_DEC, VALS(names_colors), 0x0,
 706         "Pants Color" }},
 707     { &hf_quake_CCREP_PLAYER_INFO_frags,
 708       { "Frags", "quake.control.player_info.frags",
 709         FT_UINT32, BASE_DEC, NULL, 0x0,
 710         "Player Frags" }},
 711     { &hf_quake_CCREP_PLAYER_INFO_connect_time,
 712       { "Connect Time", "quake.control.player_info.connect_time",
 713         FT_UINT32, BASE_DEC, NULL, 0x0,
 714         "Player Connect Time" }},
 715     { &hf_quake_CCREP_PLAYER_INFO_address,
 716       { "Address", "quake.control.player_info.address",
 717         FT_STRING, BASE_DEC, NULL, 0x0,
 718         "Player Address" }},
 719     { &hf_quake_CCREP_RULE_INFO_rule,
 720       { "Rule", "quake.control.rule_info.rule",
 721         FT_STRING, BASE_DEC, NULL, 0x0,
 722         "Rule Name" }},
 723     { &hf_quake_CCREP_RULE_INFO_value,
 724       { "Value", "quake.control.rule_info.value",
 725         FT_STRING, BASE_DEC, NULL, 0x0,
 726         "Rule Value" }},
 727   };
 728   static gint *ett[] = {
 729     &ett_quake,
 730     &ett_quake_control,
 731     &ett_quake_control_colors,
 732     &ett_quake_flags,
 733   };
 734
 735   proto_quake = proto_register_protocol("Quake Network Protocol", "quake");
 736   proto_register_field_array(proto_quake, hf, array_length(hf));
 737   proto_register_subtree_array(ett, array_length(ett));
 738 }
 739
 740
 741 void
 742 proto_reg_handoff_quake(void)
 743 {
 744         dissector_add("udp.port", DEFAULTnet_hostport, dissect_quake);
 745 }