/* packet-quake.c * Routines for Quake packet dissection * * Uwe Girlich * http://www.idsoftware.com/q1source/q1source.zip * * $Id: packet-quake.c,v 1.27 2002/08/02 23:35:56 jmayer Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * Copied from packet-tftp.c * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include "prefs.h" static int proto_quake = -1; static int hf_quake_header_flags = -1; static int hf_quake_header_length = -1; static int hf_quake_header_sequence = -1; static int hf_quake_control_command = -1; static int hf_quake_CCREQ_CONNECT_game = -1; static int hf_quake_CCREQ_CONNECT_version = -1; static int hf_quake_CCREQ_SERVER_INFO_game = -1; static int hf_quake_CCREQ_SERVER_INFO_version = -1; static int hf_quake_CCREQ_PLAYER_INFO_player = -1; static int hf_quake_CCREQ_RULE_INFO_lastrule = -1; static int hf_quake_CCREP_ACCEPT_port = -1; static int hf_quake_CCREP_REJECT_reason = -1; static int hf_quake_CCREP_SERVER_INFO_address = -1; static int hf_quake_CCREP_SERVER_INFO_server = -1; static int hf_quake_CCREP_SERVER_INFO_map = -1; static int hf_quake_CCREP_SERVER_INFO_num_player = -1; static int hf_quake_CCREP_SERVER_INFO_max_player = -1; static int hf_quake_CCREP_PLAYER_INFO_name = -1; static int hf_quake_CCREP_PLAYER_INFO_colors = -1; static int hf_quake_CCREP_PLAYER_INFO_colors_shirt = -1; static int hf_quake_CCREP_PLAYER_INFO_colors_pants = -1; static int hf_quake_CCREP_PLAYER_INFO_frags = -1; static int hf_quake_CCREP_PLAYER_INFO_connect_time = -1; static int hf_quake_CCREP_PLAYER_INFO_address = -1; static int hf_quake_CCREP_RULE_INFO_rule = -1; static int hf_quake_CCREP_RULE_INFO_value = -1; static gint ett_quake = -1; static gint ett_quake_control = -1; static gint ett_quake_control_colors = -1; static gint ett_quake_flags = -1; static dissector_handle_t quake_handle; static dissector_handle_t data_handle; /* I took these names directly out of the Q1 source. */ #define NETFLAG_LENGTH_MASK 0x0000ffff #define NET_HEADERSIZE 8 #define DEFAULTnet_hostport 26000 static unsigned int gbl_quakeServerPort=DEFAULTnet_hostport; #define NETFLAG_LENGTH_MASK 0x0000ffff #define NETFLAG_DATA 0x00010000 #define NETFLAG_ACK 0x00020000 #define NETFLAG_NAK 0x00040000 #define NETFLAG_EOM 0x00080000 #define NETFLAG_UNRELIABLE 0x00100000 #define NETFLAG_CTL 0x80000000 #define CCREQ_CONNECT 0x01 #define CCREQ_SERVER_INFO 0x02 #define CCREQ_PLAYER_INFO 0x03 #define CCREQ_RULE_INFO 0x04 #define CCREP_ACCEPT 0x81 #define CCREP_REJECT 0x82 #define CCREP_SERVER_INFO 0x83 #define CCREP_PLAYER_INFO 0x84 #define CCREP_RULE_INFO 0x85 static const value_string names_control_command[] = { { CCREQ_CONNECT, "connect" }, { CCREQ_SERVER_INFO, "server_info" }, { CCREQ_PLAYER_INFO, "player_info" }, { CCREQ_RULE_INFO, "rule_info" }, { CCREP_ACCEPT, "accept" }, { CCREP_REJECT, "reject" }, { CCREP_SERVER_INFO, "server_info" }, { CCREP_PLAYER_INFO, "player_info" }, { CCREP_RULE_INFO, "rule_info" }, { 0, NULL } }; #define CCREQ 0x00 #define CCREP 0x80 #define QUAKE_MAXSTRING 0x800 static const value_string names_control_direction[] = { { CCREQ, "Request" }, { CCREP, "Reply" }, { 0, NULL } }; static const value_string names_colors[] = { { 0, "White" }, { 1, "Brown" }, { 2, "Lavender" }, { 3, "Khaki" }, { 4, "Red" }, { 5, "Lt Brown" }, { 6, "Peach" }, { 7, "Lt Peach" }, { 8, "Purple" }, { 9, "Dk Purple" }, { 10, "Tan" }, { 11, "Green" }, { 12, "Yellow" }, { 13, "Blue" }, { 14, "Blue" }, { 15, "Blue" }, { 0, NULL } }; static void dissect_quake(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); static void dissect_quake_CCREQ_CONNECT (tvbuff_t *tvb, proto_tree *tree) { gint maxbufsize; char game[QUAKE_MAXSTRING]; guint8 version; gint len; maxbufsize = MIN(sizeof(game), tvb_length(tvb)); len = tvb_get_nstringz0(tvb, 0, maxbufsize, game); version = tvb_get_guint8(tvb, len + 1); if (tree) { proto_tree_add_string(tree, hf_quake_CCREQ_CONNECT_game, tvb, 0, len + 1, game); proto_tree_add_uint(tree, hf_quake_CCREQ_CONNECT_version, tvb, len + 1, 1, version); } } static void dissect_quake_CCREQ_SERVER_INFO (tvbuff_t *tvb, proto_tree *tree) { gint maxbufsize; char game[QUAKE_MAXSTRING]; guint8 version; gint len; maxbufsize = MIN(sizeof(game), tvb_length(tvb)); len = tvb_get_nstringz0(tvb, 0, maxbufsize, game); version = tvb_get_guint8(tvb, len + 1); if (tree) { proto_tree_add_string(tree, hf_quake_CCREQ_SERVER_INFO_game, tvb, 0, len + 1, game); proto_tree_add_uint(tree, hf_quake_CCREQ_SERVER_INFO_version, tvb, len + 1, 1, version); } } static void dissect_quake_CCREQ_PLAYER_INFO (tvbuff_t *tvb, proto_tree *tree) { guint8 player; player = tvb_get_guint8(tvb, 0); if (tree) { proto_tree_add_uint(tree, hf_quake_CCREQ_PLAYER_INFO_player, tvb, 0, 1, player); } } static void dissect_quake_CCREQ_RULE_INFO (tvbuff_t *tvb, proto_tree *tree) { char rule[QUAKE_MAXSTRING]; gint maxbufsize; gint len; maxbufsize = MIN(sizeof(rule), tvb_length(tvb)); len = tvb_get_nstringz0(tvb, 0, maxbufsize, rule); if (tree) { proto_tree_add_string(tree, hf_quake_CCREQ_RULE_INFO_lastrule, tvb, 0, len + 1, rule); } } static void dissect_quake_CCREP_ACCEPT (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint32 port; conversation_t *c; port = tvb_get_letohl(tvb, 0); c = conversation_new( &pinfo->src, &pinfo->dst, PT_UDP, port, pinfo->destport, 0); if (c) { conversation_set_dissector(c, quake_handle); } if (tree) { proto_tree_add_uint(tree, hf_quake_CCREP_ACCEPT_port, tvb, 0, 4, port); } } static void dissect_quake_CCREP_REJECT (tvbuff_t *tvb, proto_tree *tree) { gint maxbufsize; char reason[QUAKE_MAXSTRING]; gint len; maxbufsize = MIN(sizeof(reason), tvb_length(tvb)); len = tvb_get_nstringz0(tvb, 0, maxbufsize, reason); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_REJECT_reason, tvb, 0, len + 1, reason); } } static void dissect_quake_CCREP_SERVER_INFO (tvbuff_t *tvb, proto_tree *tree) { gint offset; gint len; gint maxbufsize; char address[QUAKE_MAXSTRING]; char server[QUAKE_MAXSTRING]; char map[QUAKE_MAXSTRING]; guint8 num_player; guint8 max_player; guint8 version; offset = 0; maxbufsize = MIN((int)sizeof(address), tvb_length_remaining(tvb, offset)); len = tvb_get_nstringz0(tvb, offset, maxbufsize, address); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_address, tvb, offset, len + 1, address); } offset += len + 1; maxbufsize = MIN((int)sizeof(server), tvb_length_remaining(tvb, offset)); len = tvb_get_nstringz0(tvb, offset, maxbufsize, server); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_server, tvb, offset, len + 1, server); } offset += len + 1; maxbufsize = MIN((int)sizeof(map), tvb_length_remaining(tvb, offset)); len = tvb_get_nstringz0(tvb, offset, maxbufsize, map); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_SERVER_INFO_map, tvb, offset, len + 1, map); } offset += len + 1; num_player = tvb_get_guint8(tvb, offset + 0); max_player = tvb_get_guint8(tvb, offset + 1); version = tvb_get_guint8(tvb, offset + 2); if (tree) { proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_num_player, tvb, offset + 0, 1, num_player); proto_tree_add_uint(tree, hf_quake_CCREP_SERVER_INFO_max_player, tvb, offset + 1, 1, max_player); proto_tree_add_uint(tree, hf_quake_CCREQ_SERVER_INFO_version, tvb, offset + 2, 1, version); } } static void dissect_quake_CCREP_PLAYER_INFO (tvbuff_t *tvb, proto_tree *tree) { gint offset; guint8 player; gint len; gint maxbufsize; char name[QUAKE_MAXSTRING]; guint32 colors; guint32 color_shirt; guint32 color_pants; guint32 frags; guint32 connect_time; char address[QUAKE_MAXSTRING]; offset = 0; player = tvb_get_guint8(tvb, offset); if (tree) { proto_tree_add_uint(tree, hf_quake_CCREQ_PLAYER_INFO_player, tvb, offset, 1, player); } offset += 1; maxbufsize = MIN((int)sizeof(name), tvb_length_remaining(tvb, offset)); len = tvb_get_nstringz0(tvb, offset, maxbufsize, name); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_name, tvb, offset, len + 1, name); } offset += len + 1; colors = tvb_get_letohl(tvb, offset + 0); color_shirt = (colors >> 4) & 0x0f; color_pants = (colors ) & 0x0f; frags = tvb_get_letohl(tvb, offset + 4); connect_time = tvb_get_letohl(tvb, offset + 8); if (tree) { proto_item *colors_item; proto_tree *colors_tree; colors_item = proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_colors, tvb, offset + 0, 4, colors); if (colors_item) { colors_tree = proto_item_add_subtree(colors_item, ett_quake_control_colors); proto_tree_add_uint(colors_tree, hf_quake_CCREP_PLAYER_INFO_colors_shirt, tvb, offset + 0, 1, color_shirt); proto_tree_add_uint(colors_tree, hf_quake_CCREP_PLAYER_INFO_colors_pants, tvb, offset + 0, 1, color_pants); } proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_frags, tvb, offset + 4, 4, frags); proto_tree_add_uint(tree, hf_quake_CCREP_PLAYER_INFO_connect_time, tvb, offset + 8, 4, connect_time); } offset += 3*4; maxbufsize = MIN((int)sizeof(address), tvb_length_remaining(tvb, offset)); len = tvb_get_nstringz0(tvb, offset, maxbufsize, address); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_PLAYER_INFO_address, tvb, offset, len + 1, address); } offset += len + 1; } static void dissect_quake_CCREP_RULE_INFO (tvbuff_t *tvb, proto_tree *tree) { char rule[QUAKE_MAXSTRING]; char value[QUAKE_MAXSTRING]; gint maxbufsize; gint len; gint offset; if (tvb_length(tvb) == 0) return; offset = 0; maxbufsize = MIN((int)sizeof(rule), tvb_length_remaining(tvb, offset)); len = tvb_get_nstringz0(tvb, offset, maxbufsize, rule); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_rule, tvb, offset, len + 1, rule); } offset += len + 1; maxbufsize = MIN((int)sizeof(value), tvb_length_remaining(tvb, offset)); len = tvb_get_nstringz0(tvb, offset, maxbufsize, value); if (tree) { proto_tree_add_string(tree, hf_quake_CCREP_RULE_INFO_value, tvb, offset, len + 1, value); } offset += len + 1; } static void dissect_quake_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint8 command; int direction; proto_item *control_item = NULL; proto_tree *control_tree = NULL; guint rest_length; tvbuff_t *next_tvb; command = tvb_get_guint8(tvb, 0); direction = (command & 0x80) ? CCREP : CCREQ; if (check_col(pinfo->cinfo, COL_INFO)) { col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s", val_to_str(command,names_control_command, "%u"), val_to_str(direction,names_control_direction,"%u")); } if (tree) { control_item = proto_tree_add_text(tree, tvb, 0, -1, "Control %s: %s", val_to_str(direction, names_control_direction, "%u"), val_to_str(command, names_control_command, "%u")); if (control_item) control_tree = proto_item_add_subtree(control_item, ett_quake_control); proto_tree_add_uint(control_tree, hf_quake_control_command, tvb, 0, 1, command); } rest_length = tvb_reported_length(tvb) - 1; next_tvb = tvb_new_subset(tvb, 1, rest_length , rest_length); switch (command) { case CCREQ_CONNECT: dissect_quake_CCREQ_CONNECT (next_tvb, control_tree); break; case CCREQ_SERVER_INFO: dissect_quake_CCREQ_SERVER_INFO (next_tvb, control_tree); break; case CCREQ_PLAYER_INFO: dissect_quake_CCREQ_PLAYER_INFO (next_tvb, control_tree); break; case CCREQ_RULE_INFO: dissect_quake_CCREQ_RULE_INFO (next_tvb, control_tree); break; case CCREP_ACCEPT: dissect_quake_CCREP_ACCEPT (next_tvb, pinfo, control_tree); break; case CCREP_REJECT: dissect_quake_CCREP_REJECT (next_tvb, control_tree); break; case CCREP_SERVER_INFO: dissect_quake_CCREP_SERVER_INFO (next_tvb, control_tree); break; case CCREP_PLAYER_INFO: dissect_quake_CCREP_PLAYER_INFO (next_tvb, control_tree); break; case CCREP_RULE_INFO: dissect_quake_CCREP_RULE_INFO (next_tvb, control_tree); break; default: call_dissector(data_handle,next_tvb, pinfo, control_tree); break; } } static void dissect_quake(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_tree *quake_tree = NULL; proto_item *quake_item = NULL; guint32 length; guint32 flags; guint32 sequence = 0; guint rest_length; tvbuff_t *next_tvb; if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "QUAKE"); if (check_col(pinfo->cinfo, COL_INFO)) col_clear(pinfo->cinfo, COL_INFO); length = tvb_get_ntohl(tvb, 0); flags = length & (~NETFLAG_LENGTH_MASK); length &= NETFLAG_LENGTH_MASK; if (tree) { quake_item = proto_tree_add_item(tree, proto_quake, tvb, 0, -1, FALSE); if (quake_item) quake_tree = proto_item_add_subtree(quake_item, ett_quake); } if (quake_tree) { proto_item* flags_item = NULL; proto_tree* flags_tree = NULL; flags_item = proto_tree_add_uint(quake_tree, hf_quake_header_flags, tvb, 0, 2, flags); if (flags_item) { flags_tree = proto_item_add_subtree(flags_item, ett_quake_flags); } if (flags_tree) { proto_tree_add_text(flags_tree, tvb, 0, 2, decode_boolean_bitfield(flags, NETFLAG_DATA, 32, "Data","-")); proto_tree_add_text(flags_tree, tvb, 0, 2, decode_boolean_bitfield(flags, NETFLAG_ACK, 32, "Acknowledgment","-")); proto_tree_add_text(flags_tree, tvb, 0, 2, decode_boolean_bitfield(flags, NETFLAG_NAK, 32, "No Acknowledgment","-")); proto_tree_add_text(flags_tree, tvb, 0, 2, decode_boolean_bitfield(flags, NETFLAG_EOM, 32, "End Of Message","-")); proto_tree_add_text(flags_tree, tvb, 0, 2, decode_boolean_bitfield(flags, NETFLAG_UNRELIABLE, 32, "Unreliable","-")); proto_tree_add_text(flags_tree, tvb, 0, 2, decode_boolean_bitfield(flags, NETFLAG_CTL, 32, "Control","-")); } proto_tree_add_uint(quake_tree, hf_quake_header_length, tvb, 2, 2, length); } if (flags == NETFLAG_CTL) { rest_length = tvb_reported_length(tvb) - 4; next_tvb = tvb_new_subset(tvb, 4, rest_length , rest_length); dissect_quake_control(next_tvb, pinfo, quake_tree); return; } sequence = tvb_get_ntohl(tvb, 4); if (check_col(pinfo->cinfo, COL_INFO)) { col_add_fstr(pinfo->cinfo, COL_INFO, "seq 0x%x", sequence); } if (quake_tree) { proto_tree_add_uint(quake_tree, hf_quake_header_sequence, tvb, 4, 4, sequence); } rest_length = tvb_reported_length(tvb) - 8; next_tvb = tvb_new_subset(tvb, 8, rest_length , rest_length); call_dissector(data_handle,next_tvb, pinfo, quake_tree); } void proto_reg_handoff_quake(void) { static int Initialized=FALSE; static int ServerPort=0; if (Initialized) { dissector_delete("udp.port", ServerPort, quake_handle); } else { Initialized=TRUE; } /* set port for future deletes */ ServerPort=gbl_quakeServerPort; dissector_add("udp.port", gbl_quakeServerPort, quake_handle); data_handle = find_dissector("data"); } void proto_register_quake(void) { static hf_register_info hf[] = { { &hf_quake_header_flags, { "Flags", "quake.header.flags", FT_UINT16, BASE_HEX, NULL, 0x0, "Flags", HFILL }}, { &hf_quake_header_length, { "Length", "quake.header.length", FT_UINT16, BASE_DEC, NULL, 0x0, "full data length", HFILL }}, { &hf_quake_header_sequence, { "Sequence", "quake.header.sequence", FT_UINT32, BASE_HEX, NULL, 0x0, "Sequence Number", HFILL }}, { &hf_quake_control_command, { "Command", "quake.control.command", FT_UINT8, BASE_HEX, VALS(names_control_command), 0x0, "Control Command", HFILL }}, { &hf_quake_CCREQ_CONNECT_game, { "Game", "quake.control.connect.game", FT_STRING, BASE_DEC, NULL, 0x0, "Game Name", HFILL }}, { &hf_quake_CCREQ_CONNECT_version, { "Version", "quake.control.connect.version", FT_UINT8, BASE_DEC, NULL, 0x0, "Game Protocol Version Number", HFILL }}, { &hf_quake_CCREQ_SERVER_INFO_game, { "Game", "quake.control.server_info.game", FT_STRING, BASE_DEC, NULL, 0x0, "Game Name", HFILL }}, { &hf_quake_CCREQ_SERVER_INFO_version, { "Version", "quake.control.server_info.version", FT_UINT8, BASE_DEC, NULL, 0x0, "Game Protocol Version Number", HFILL }}, { &hf_quake_CCREQ_PLAYER_INFO_player, { "Player", "quake.control.player_info.player", FT_UINT8, BASE_DEC, NULL, 0x0, "Player", HFILL }}, { &hf_quake_CCREQ_RULE_INFO_lastrule, { "Last Rule", "quake.control.rule_info.lastrule", FT_STRING, BASE_DEC, NULL, 0x0, "Last Rule Name", HFILL }}, { &hf_quake_CCREP_ACCEPT_port, { "Port", "quake.control.accept.port", FT_UINT32, BASE_DEC, NULL, 0x0, "Game Data Port", HFILL }}, { &hf_quake_CCREP_REJECT_reason, { "Reason", "quake.control.reject.reason", FT_STRING, BASE_DEC, NULL, 0x0, "Reject Reason", HFILL }}, { &hf_quake_CCREP_SERVER_INFO_address, { "Address", "quake.control.server_info.address", FT_STRING, BASE_DEC, NULL, 0x0, "Server Address", HFILL }}, { &hf_quake_CCREP_SERVER_INFO_server, { "Server", "quake.control.server_info.server", FT_STRING, BASE_DEC, NULL, 0x0, "Server Name", HFILL }}, { &hf_quake_CCREP_SERVER_INFO_map, { "Map", "quake.control.server_info.map", FT_STRING, BASE_DEC, NULL, 0x0, "Map Name", HFILL }}, { &hf_quake_CCREP_SERVER_INFO_num_player, { "Number of Players", "quake.control.server_info.num_player", FT_UINT8, BASE_DEC, NULL, 0x0, "Current Number of Players", HFILL }}, { &hf_quake_CCREP_SERVER_INFO_max_player, { "Maximal Number of Players", "quake.control.server_info.max_player", FT_UINT8, BASE_DEC, NULL, 0x0, "Maximal Number of Players", HFILL }}, { &hf_quake_CCREP_PLAYER_INFO_name, { "Name", "quake.control.player_info.name", FT_STRING, BASE_DEC, NULL, 0x0, "Player Name", HFILL }}, { &hf_quake_CCREP_PLAYER_INFO_colors, { "Colors", "quake.control.player_info.colors", FT_UINT32, BASE_HEX, NULL, 0x0, "Player Colors", HFILL }}, { &hf_quake_CCREP_PLAYER_INFO_colors_shirt, { "Shirt", "quake.control.player_info.colors.shirt", FT_UINT8, BASE_DEC, VALS(names_colors), 0x0, "Shirt Color", HFILL }}, { &hf_quake_CCREP_PLAYER_INFO_colors_pants, { "Pants", "quake.control.player_info.colors.pants", FT_UINT8, BASE_DEC, VALS(names_colors), 0x0, "Pants Color", HFILL }}, { &hf_quake_CCREP_PLAYER_INFO_frags, { "Frags", "quake.control.player_info.frags", FT_UINT32, BASE_DEC, NULL, 0x0, "Player Frags", HFILL }}, { &hf_quake_CCREP_PLAYER_INFO_connect_time, { "Connect Time", "quake.control.player_info.connect_time", FT_UINT32, BASE_DEC, NULL, 0x0, "Player Connect Time", HFILL }}, { &hf_quake_CCREP_PLAYER_INFO_address, { "Address", "quake.control.player_info.address", FT_STRING, BASE_DEC, NULL, 0x0, "Player Address", HFILL }}, { &hf_quake_CCREP_RULE_INFO_rule, { "Rule", "quake.control.rule_info.rule", FT_STRING, BASE_DEC, NULL, 0x0, "Rule Name", HFILL }}, { &hf_quake_CCREP_RULE_INFO_value, { "Value", "quake.control.rule_info.value", FT_STRING, BASE_DEC, NULL, 0x0, "Rule Value", HFILL }}, }; static gint *ett[] = { &ett_quake, &ett_quake_control, &ett_quake_control_colors, &ett_quake_flags, }; module_t *quake_module; proto_quake = proto_register_protocol("Quake Network Protocol", "QUAKE", "quake"); proto_register_field_array(proto_quake, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); quake_handle = create_dissector_handle(dissect_quake, proto_quake); /* Register a configuration option for port */ quake_module = prefs_register_protocol(proto_quake, proto_reg_handoff_quake); prefs_register_uint_preference(quake_module, "udp.port", "Quake Server UDP Port", "Set the UDP port for the Quake Server", 10, &gbl_quakeServerPort); }