eb2d6593dc
arguments to "proto_tree_add_text()", and to "proto_tree_add_XXX()" calls that add FT_NONE or FT_PROTO items to the protocol tree, with -1. Replace some calls to "tvb_length()" or "tvb_length_remaining()" with calls to "tvb_reported_length()" and "tvb_reported_length_remaining()", as those give the actual length of the data in the packet, not just the data that happened to be captured. svn path=/trunk/; revision=4605
419 lines
11 KiB
C
419 lines
11 KiB
C
/* packet-quake2.c
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* Routines for Quake II packet dissection
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*
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* Uwe Girlich <uwe@planetquake.com>
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* http://www.idsoftware.com/q1source/q1source.zip
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* http://www.planetquake.com/demospecs/dm2
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* http://www.dgs.monash.edu.au/~timf/bottim/
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* http://www.opt-sci.Arizona.EDU/Pandora/default.asp
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*
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* $Id: packet-quake2.c,v 1.9 2002/01/24 09:20:50 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-quakeworld.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include "prefs.h"
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static int proto_quake2 = -1;
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static int hf_quake2_s2c = -1;
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static int hf_quake2_c2s = -1;
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static int hf_quake2_connectionless = -1;
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static int hf_quake2_game = -1;
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static int hf_quake2_connectionless_marker = -1;
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static int hf_quake2_connectionless_text = -1;
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static int hf_quake2_game_seq1 = -1;
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static int hf_quake2_game_rel1 = -1;
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static int hf_quake2_game_seq2 = -1;
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static int hf_quake2_game_rel2 = -1;
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static int hf_quake2_game_qport = -1;
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static gint ett_quake2 = -1;
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static gint ett_quake2_connectionless = -1;
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static gint ett_quake2_game = -1;
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static gint ett_quake2_game_seq1 = -1;
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static gint ett_quake2_game_seq2 = -1;
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static gint ett_quake2_game_clc = -1;
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static gint ett_quake2_game_svc = -1;
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static dissector_handle_t data_handle;
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#define PORT_MASTER 27910
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static unsigned int gbl_quake2ServerPort=PORT_MASTER;
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static void
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dissect_quake2_ConnectionlessPacket(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, int direction)
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{
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proto_tree *cl_tree = NULL;
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proto_item *cl_item = NULL;
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guint8 text[2048];
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int maxbufsize = 0;
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int len;
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int offset;
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guint32 marker;
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marker = tvb_get_ntohl(tvb, 0);
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if (tree) {
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cl_item = proto_tree_add_text(tree, tvb,
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0, -1, "Connectionless");
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if (cl_item)
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cl_tree = proto_item_add_subtree(
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cl_item, ett_quake2_connectionless);
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}
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if (cl_tree) {
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proto_tree_add_uint(cl_tree, hf_quake2_connectionless_marker,
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tvb, 0, 4, marker);
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}
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/* all the rest of the packet is just text */
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offset = 4;
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maxbufsize = MIN((gint)sizeof(text), tvb_length_remaining(tvb, offset));
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len = tvb_get_nstringz0(tvb, offset, maxbufsize, text);
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if (cl_tree) {
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proto_tree_add_string(cl_tree, hf_quake2_connectionless_text,
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tvb, offset, len + 1, text);
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}
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offset += len + 1;
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/* we should analyse the result 'text' a bit further */
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/* for this we need the direction parameter */
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}
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static void
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dissect_quake2_client_commands(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree)
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{
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/* If I have too much time at hand, I'll fill it with all
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the information from my DM2 specs:
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http://www.planetquake.com/demospecs/dm2/
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*/
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call_dissector(data_handle,tvb, pinfo, tree);
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}
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static void
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dissect_quake2_server_commands(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree)
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{
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/* If I have too much time at hand, I'll fill it with all
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the information from my DM2 specs:
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http://www.planetquake.com/demospecs/dm2/
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*/
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call_dissector(data_handle,tvb, pinfo, tree);
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}
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static const value_string names_reliable[] = {
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{ 0, "Non Reliable" },
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{ 1, "Reliable" },
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{ 0, NULL }
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};
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static const value_string names_direction[] = {
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#define DIR_C2S 0
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{ DIR_C2S, "Client to Server" },
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#define DIR_S2C 1
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{ DIR_S2C, "Server to Client" },
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{ 0, NULL }
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};
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static void
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dissect_quake2_GamePacket(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, int direction)
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{
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proto_tree *game_tree = NULL;
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proto_item *game_item = NULL;
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guint32 seq1;
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guint32 seq2;
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int rel1;
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int rel2;
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int offset;
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guint rest_length;
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direction = (pinfo->destport == gbl_quake2ServerPort) ?
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DIR_C2S : DIR_S2C;
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if (tree) {
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game_item = proto_tree_add_text(tree, tvb,
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0, -1, "Game");
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if (game_item)
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game_tree = proto_item_add_subtree(
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game_item, ett_quake2_game);
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}
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offset = 0;
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seq1 = tvb_get_letohl(tvb, offset);
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rel1 = seq1 & 0x80000000 ? 1 : 0;
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seq1 &= ~0x80000000;
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if (game_tree) {
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proto_item *seq1_item = proto_tree_add_text(game_tree,
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tvb, offset, 4, "Current Sequence: %u (%s)",
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seq1, val_to_str(rel1,names_reliable,"%u"));
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if (seq1_item) {
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proto_tree *seq1_tree = proto_item_add_subtree(
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seq1_item, ett_quake2_game_seq1);
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proto_tree_add_uint(seq1_tree, hf_quake2_game_seq1,
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tvb, offset, 4, seq1);
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proto_tree_add_boolean(seq1_tree, hf_quake2_game_rel1,
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tvb, offset+3, 1, rel1);
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}
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}
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offset += 4;
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seq2 = tvb_get_letohl(tvb, offset);
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rel2 = seq2 & 0x80000000 ? 1 : 0;
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seq2 &= ~0x80000000;
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if (game_tree) {
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proto_item *seq2_item = proto_tree_add_text(game_tree,
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tvb, offset, 4, "Acknowledge Sequence: %u (%s)",
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seq2, val_to_str(rel2,names_reliable,"%u"));;
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if (seq2_item) {
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proto_tree *seq2_tree = proto_item_add_subtree(
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seq2_item, ett_quake2_game_seq2);
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proto_tree_add_uint(seq2_tree, hf_quake2_game_seq2,
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tvb, offset, 4, seq2);
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proto_tree_add_boolean(seq2_tree, hf_quake2_game_rel2,
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tvb, offset+3, 1, rel2);
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}
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}
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offset += 4;
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if (direction == DIR_C2S) {
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/* client to server */
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guint16 qport = tvb_get_letohs(tvb, offset);
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if (game_tree) {
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proto_tree_add_uint(game_tree, hf_quake2_game_qport,
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tvb, offset, 2, qport);
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}
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offset +=2;
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}
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/* all the rest is pure game data */
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rest_length = tvb_reported_length(tvb) - offset;
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if (rest_length) {
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tvbuff_t *next_tvb =
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tvb_new_subset(tvb, offset, rest_length , rest_length);
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if (direction == DIR_C2S) {
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proto_item *c_item = NULL;
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proto_tree *c_tree = NULL;
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if (tree) {
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c_item = proto_tree_add_text(game_tree, next_tvb,
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0, -1, "Client Commands");
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if (c_item) {
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c_tree = proto_item_add_subtree(
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c_item, ett_quake2_game_clc);
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}
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}
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dissect_quake2_client_commands(next_tvb, pinfo, c_tree);
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}
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else {
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proto_item *c_item = NULL;
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proto_tree *c_tree = NULL;
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if (tree) {
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c_item = proto_tree_add_text(game_tree, next_tvb,
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0, -1, "Server Commands");
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if (c_item) {
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c_tree = proto_item_add_subtree(
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c_item, ett_quake2_game_svc);
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}
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}
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dissect_quake2_server_commands(next_tvb, pinfo, c_tree);
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}
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}
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}
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static void
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dissect_quake2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *quake2_tree = NULL;
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proto_item *quake2_item = NULL;
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int direction;
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direction = (pinfo->destport == gbl_quake2ServerPort) ?
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DIR_C2S : DIR_S2C;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "QUAKE2");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO, val_to_str(direction,
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names_direction, "%u"));
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if (tree) {
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quake2_item = proto_tree_add_item(tree, proto_quake2,
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tvb, 0, -1, FALSE);
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if (quake2_item)
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quake2_tree = proto_item_add_subtree(
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quake2_item, ett_quake2);
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if (quake2_tree) {
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proto_tree_add_uint_format(quake2_tree,
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direction == DIR_S2C ?
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hf_quake2_s2c :
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hf_quake2_c2s,
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tvb, 0, 0, 1,
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"Direction: %s", val_to_str(direction, names_direction, "%u"));
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}
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}
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if (tvb_get_ntohl(tvb, 0) == 0xffffffff) {
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_str(pinfo->cinfo, COL_INFO, " Connectionless");
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}
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if (quake2_tree)
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proto_tree_add_uint_format(quake2_tree,
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hf_quake2_connectionless,
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tvb, 0, 0, 1,
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"Type: Connectionless");
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dissect_quake2_ConnectionlessPacket(
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tvb, pinfo, quake2_tree, direction);
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}
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else {
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_str(pinfo->cinfo, COL_INFO, " Game");
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}
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if (quake2_tree)
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proto_tree_add_uint_format(quake2_tree,
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hf_quake2_game,
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tvb, 0, 0, 1,
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"Type: Game");
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dissect_quake2_GamePacket(
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tvb, pinfo, quake2_tree, direction);
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}
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}
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void
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proto_reg_handoff_quake2(void)
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{
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static int Initialized=FALSE;
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static dissector_handle_t quake2_handle;
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static int ServerPort=0;
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if (!Initialized) {
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quake2_handle = create_dissector_handle(dissect_quake2,
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proto_quake2);
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Initialized=TRUE;
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} else {
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dissector_delete("udp.port", ServerPort, quake2_handle);
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}
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/* set port for future deletes */
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ServerPort=gbl_quake2ServerPort;
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dissector_add("udp.port", gbl_quake2ServerPort, quake2_handle);
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data_handle = find_dissector("data");
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}
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void
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proto_register_quake2(void)
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{
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static hf_register_info hf[] = {
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{ &hf_quake2_c2s,
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{ "Client to Server", "quake2.c2s",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Client to Server", HFILL }},
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{ &hf_quake2_s2c,
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{ "Server to Client", "quake2.s2c",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Server to Client", HFILL }},
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{ &hf_quake2_connectionless,
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{ "Connectionless", "quake2.connectionless",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Connectionless", HFILL }},
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{ &hf_quake2_game,
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{ "Game", "quake2.game",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Game", HFILL }},
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{ &hf_quake2_connectionless_marker,
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{ "Marker", "quake2.connectionless.marker",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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"Marker", HFILL }},
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{ &hf_quake2_connectionless_text,
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{ "Text", "quake2.connectionless.text",
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FT_STRING, BASE_DEC, NULL, 0x0,
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"Text", HFILL }},
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{ &hf_quake2_game_seq1,
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{ "Sequence Number", "quake2.game.seq1",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Sequence number of the current packet", HFILL }},
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{ &hf_quake2_game_rel1,
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{ "Reliable", "quake2.game.rel1",
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FT_BOOLEAN, BASE_DEC, NULL, 0x0,
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"Packet is reliable and may be retransmitted", HFILL }},
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{ &hf_quake2_game_seq2,
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{ "Sequence Number", "quake2.game.seq2",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Sequence number of the last received packet", HFILL }},
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{ &hf_quake2_game_rel2,
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{ "Reliable", "quake2.game.rel2",
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FT_BOOLEAN, BASE_DEC, NULL, 0x0,
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"Packet was reliable and may be retransmitted", HFILL }},
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{ &hf_quake2_game_qport,
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{ "QPort", "quake2.game.qport",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"Quake II Client Port", HFILL }}
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};
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static gint *ett[] = {
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&ett_quake2,
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&ett_quake2_connectionless,
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&ett_quake2_game,
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&ett_quake2_game_seq1,
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&ett_quake2_game_seq2,
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&ett_quake2_game_clc,
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&ett_quake2_game_svc
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};
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module_t *quake2_module;
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proto_quake2 = proto_register_protocol("Quake II Network Protocol",
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"QUAKE2", "quake2");
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proto_register_field_array(proto_quake2, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* Register a configuration option for port */
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quake2_module = prefs_register_protocol(proto_quake2,
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proto_reg_handoff_quake2);
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prefs_register_uint_preference(quake2_module, "udp.port",
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"Quake II Server UDP Port",
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"Set the UDP port for the Quake II Server",
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10, &gbl_quake2ServerPort);
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}
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