forked from osmocom/wireshark
![Evan Huus](/assets/img/avatar_default.png)
Change-Id: Ie137e6f4e20fe26b1a4d9510e267896219c1c631 Reviewed-on: https://code.wireshark.org/review/9075 Reviewed-by: Evan Huus <eapache@gmail.com>
626 lines
18 KiB
C
626 lines
18 KiB
C
/* packet-quake3.c
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* Routines for Quake III Arena packet dissection
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*
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* Uwe Girlich <uwe@planetquake.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-quake2.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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All informations used in this decoding were gathered from
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* some own captures of a private server,
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* the "Server commands howto" document written by id Software
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(http://www.quake3arena.com/tech/ServerCommandsHowto.html)
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* source code of the game server browser tool qstat
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(http://www.qstat.org).
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/addr_resolv.h>
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void proto_register_quake3(void);
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static int proto_quake3 = -1;
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static int hf_quake3_direction = -1;
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static int hf_quake3_connectionless = -1;
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static int hf_quake3_game = -1;
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static int hf_quake3_connectionless_marker = -1;
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static int hf_quake3_connectionless_text = -1;
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static int hf_quake3_connectionless_command = -1;
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static int hf_quake3_server_addr = -1;
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static int hf_quake3_server_port = -1;
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static int hf_quake3_game_seq1 = -1;
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static int hf_quake3_game_rel1 = -1;
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static int hf_quake3_game_seq2 = -1;
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static int hf_quake3_game_rel2 = -1;
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static int hf_quake3_game_qport = -1;
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static gint ett_quake3 = -1;
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static gint ett_quake3_connectionless = -1;
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static gint ett_quake3_connectionless_text = -1;
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static gint ett_quake3_server = -1;
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static gint ett_quake3_game = -1;
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static gint ett_quake3_game_seq1 = -1;
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static gint ett_quake3_game_seq2 = -1;
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static gint ett_quake3_game_clc = -1;
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static gint ett_quake3_game_svc = -1;
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static dissector_handle_t data_handle;
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#define QUAKE3_SERVER_PORT 27960
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#define QUAKE3_MASTER_PORT 27950
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static guint gbl_quake3_server_port=QUAKE3_SERVER_PORT;
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static guint gbl_quake3_master_port=QUAKE3_MASTER_PORT;
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static const value_string names_direction[] = {
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#define DIR_UNKNOWN 0
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{ DIR_UNKNOWN, "Unknown" },
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#define DIR_C2S 1
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{ DIR_C2S, "Client to Server" },
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#define DIR_S2C 2
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{ DIR_S2C, "Server to Client" },
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#define DIR_C2M 3
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{ DIR_C2M, "Client to Master" },
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#define DIR_M2C 4
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{ DIR_M2C, "Master to Client" },
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{ 0, NULL }
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};
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#define string_starts_with(s1, s2) (strncmp((s1), (s2), strlen(s2)) == 0)
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static const value_string names_command[] = {
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#define COMMAND_UNKNOWN 0
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{ COMMAND_UNKNOWN, "Unknown" },
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#define COMMAND_statusResponse 1
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{ COMMAND_statusResponse, "Reply Status" },
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#define COMMAND_getstatus 2
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{ COMMAND_getstatus, "Request Status" },
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#define COMMAND_infoResponse 3
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{ COMMAND_infoResponse, "Reply Info" },
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#define COMMAND_getinfo 4
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{ COMMAND_getinfo, "Request Info" },
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#define COMMAND_challengeResponse 5
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{ COMMAND_challengeResponse, "Reply Challenge" },
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#define COMMAND_getchallenge 6
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{ COMMAND_getchallenge, "Request Challenge" },
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#define COMMAND_connectResponse 7
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{ COMMAND_connectResponse, "Reply Connect" },
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#define COMMAND_connect 8
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{ COMMAND_connect, "Request Connect" },
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#define COMMAND_rconResponse 9
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{ COMMAND_rconResponse, "Reply Remote Command" },
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#define COMMAND_rcon 10
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{ COMMAND_rcon, "Request Remote Command" },
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#define COMMAND_getmotdResponse 11
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{ COMMAND_getmotdResponse, "Reply Motto of the Day" },
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#define COMMAND_getmotd 12
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{ COMMAND_getmotd, "Request Motto of the Day" },
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#define COMMAND_getserversResponse 13
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{ COMMAND_getserversResponse, "Reply Servers" },
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#define COMMAND_getservers 14
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{ COMMAND_getservers, "Request Servers" },
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#define COMMAND_getKeyAuthorize 15
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{ COMMAND_getKeyAuthorize, "Request Key Authorization" },
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#define COMMAND_getIpAuthorize 16
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{ COMMAND_getIpAuthorize, "Request IP Authorization" },
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#define COMMAND_ipAuthorize 17
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{ COMMAND_ipAuthorize, "Reply IP Authorization" },
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{ 0, NULL }
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};
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static void
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dissect_quake3_ConnectionlessPacket(tvbuff_t *tvb, packet_info *pinfo _U_,
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proto_tree *tree, int* direction)
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{
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proto_tree *cl_tree;
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proto_item *text_item = NULL;
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proto_tree *text_tree = NULL;
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guint8 *text;
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int len;
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int offset;
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guint32 marker;
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int command;
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int command_len;
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gboolean command_finished = FALSE;
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cl_tree = proto_tree_add_subtree(tree, tvb,
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0, -1, ett_quake3_connectionless, NULL, "Connectionless");
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marker = tvb_get_ntohl(tvb, 0);
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proto_tree_add_uint(cl_tree, hf_quake3_connectionless_marker,
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tvb, 0, 4, marker);
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/* all the rest of the packet is just text */
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offset = 4;
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/*
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* XXX - is there ever more than one null-terminated string in
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* the packet?
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*
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* XXX - is the string guaranteed to be null-terminated (so
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* that if there's no NUL at the end, it's an error)?
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*
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* XXX - are non-ASCII characters supported and, if so, what
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* encoding is used for them?
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*/
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text = tvb_get_stringz_enc(wmem_packet_scope(), tvb, offset, &len, ENC_ASCII|ENC_NA);
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if (cl_tree) {
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text_item = proto_tree_add_string(cl_tree,
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hf_quake3_connectionless_text,
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tvb, offset, len, text);
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text_tree = proto_item_add_subtree(text_item, ett_quake3_connectionless_text);
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}
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command = COMMAND_UNKNOWN;
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command_len = 0;
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if (strncmp(text, "statusResponse", 14) == 0) {
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command = COMMAND_statusResponse;
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*direction = DIR_S2C;
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command_len = 14;
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}
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else if (strncmp(text, "getstatus", 9) == 0) {
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command = COMMAND_getstatus;
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*direction = DIR_C2S;
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command_len = 9;
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}
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else if (strncmp(text, "infoResponse", 12) == 0) {
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command = COMMAND_infoResponse;
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*direction = DIR_S2C;
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command_len = 12;
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}
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else if (strncmp(text, "getinfo", 7) == 0) {
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command = COMMAND_getinfo;
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*direction = DIR_C2S;
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command_len = 7;
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}
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else if (strncmp(text, "challengeResponse", 17) == 0) {
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command = COMMAND_challengeResponse;
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*direction = DIR_S2C;
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command_len = 17;
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}
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else if (strncmp(text, "getchallenge", 12) == 0) {
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command = COMMAND_getchallenge;
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*direction = DIR_C2S;
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command_len = 12;
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}
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else if (strncmp(text, "connectResponse", 15) == 0) {
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command = COMMAND_connectResponse;
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*direction = DIR_S2C;
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command_len = 15;
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}
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else if (strncmp(text, "connect", 7) == 0) {
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command = COMMAND_connect;
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*direction = DIR_C2S;
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command_len = 7;
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}
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else if (strncmp(text, "rconResponse", 12) == 0) {
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command = COMMAND_rconResponse;
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*direction = DIR_S2C;
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command_len = 12;
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}
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else if (strncmp(text, "rcon", 4) == 0) {
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command = COMMAND_rcon;
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*direction = DIR_C2S;
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command_len = 4;
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}
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else if (strncmp(text, "getmotdResponse", 15) == 0) {
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command = COMMAND_getmotdResponse;
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*direction = DIR_M2C;
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command_len = 15;
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}
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else if (strncmp(text, "getmotd", 7) == 0) {
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command = COMMAND_getmotd;
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*direction = DIR_C2M;
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command_len = 7;
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}
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else if (strncmp(text, "getserversResponse", 18) == 0) {
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int base;
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command = COMMAND_getserversResponse;
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*direction = DIR_M2C;
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command_len = 18;
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/* The data can contain 0's, and the text string is binary
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anyway, so better replace the text string after the first
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\ with "<DATA>". */
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if (text_item) {
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/* first correct the length until the end of the packet */
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proto_item_set_len(text_item, tvb_captured_length_remaining(tvb, offset));
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/* then replace the text */
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proto_item_set_text(text_item, "Text: getserversResponse<DATA>");
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}
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if (text_tree)
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proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
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tvb, offset, command_len,
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val_to_str_const(command, names_command, "Unknown"));
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command_finished = TRUE;
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/* now we decode all the rest */
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base = offset + 18;
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/* '/', ip-address in network order, port in network order */
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while (tvb_reported_length_remaining(tvb, base) >= 7) {
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guint32 ip_addr;
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guint16 udp_port;
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ip_addr = tvb_get_ipv4(tvb, base + 1);
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udp_port = tvb_get_ntohs(tvb, base + 5);
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/* It may be a good idea to create a conversation for
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every server in this list, as we'll see at
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least a getinfo request to each of them and they
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may run on totally unusual ports. */
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if (text_tree) {
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proto_tree *server_tree;
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server_tree = proto_tree_add_subtree_format(text_tree,
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tvb, base, 7,
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ett_quake3_server, NULL, "Server: %s:%u",
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get_hostname(ip_addr),
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udp_port);
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proto_tree_add_ipv4(server_tree, hf_quake3_server_addr,
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tvb, base + 1, 4, ip_addr);
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proto_tree_add_uint(server_tree, hf_quake3_server_port,
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tvb, base + 5, 2, udp_port);
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}
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base += 7;
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}
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}
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else if (strncmp(text, "getservers", 10) == 0) {
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command = COMMAND_getservers;
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*direction = DIR_C2M;
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command_len = 10;
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}
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else if (strncmp(text, "getKeyAuthorize", 15) == 0) {
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command = COMMAND_getKeyAuthorize;
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*direction = DIR_C2M;
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command_len = 15;
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}
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else if (strncmp(text, "getIpAuthorize", 14) == 0) {
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command = COMMAND_getIpAuthorize;
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*direction = DIR_C2M;
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command_len = 14;
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}
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else if (strncmp(text, "ipAuthorize", 11) == 0) {
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command = COMMAND_ipAuthorize;
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*direction = DIR_M2C;
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command_len = 11;
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}
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else {
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*direction = DIR_UNKNOWN;
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}
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if (text_tree && command_finished == FALSE) {
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proto_tree_add_string(text_tree, hf_quake3_connectionless_command,
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tvb, offset, command_len,
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val_to_str_const(command, names_command, "Unknown"));
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}
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/*offset += len;*/
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}
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static void
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dissect_quake3_client_commands(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree)
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{
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/* this shouldn't be too difficult */
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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_quake3_server_commands(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree)
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{
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/* It is totally forbidden to decode this any further,
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I won't do it. */
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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 void
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dissect_quake3_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;
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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_quake3_server_port) ?
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DIR_C2S : DIR_S2C;
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game_tree = proto_tree_add_subtree(tree, tvb, 0, -1, ett_quake3_game, NULL, "Game");
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offset = 0;
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seq1 = tvb_get_letohs(tvb, offset);
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rel1 = seq1 & 0x8000 ? 1 : 0;
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seq1 &= ~0x8000;
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if (game_tree) {
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proto_tree *seq1_tree = proto_tree_add_subtree_format(game_tree,
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tvb, offset, 2, ett_quake3_game_seq1, NULL, "Current Sequence: %u (%s)",
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seq1, val_to_str(rel1,names_reliable,"%u"));
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proto_tree_add_uint(seq1_tree, hf_quake3_game_seq1,
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tvb, offset, 2, seq1);
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proto_tree_add_boolean(seq1_tree, hf_quake3_game_rel1,
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tvb, offset+1, 1, rel1);
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}
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offset += 2;
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seq2 = tvb_get_letohs(tvb, offset);
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rel2 = seq2 & 0x8000 ? 1 : 0;
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seq2 &= ~0x8000;
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if (game_tree) {
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proto_tree *seq2_tree = proto_tree_add_subtree_format(game_tree,
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tvb, offset, 2, ett_quake3_game_seq2, NULL, "Acknowledge Sequence: %u (%s)",
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seq2, val_to_str(rel2,names_reliable,"%u"));
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proto_tree_add_uint(seq2_tree, hf_quake3_game_seq2,
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tvb, offset, 2, seq2);
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proto_tree_add_boolean(seq2_tree, hf_quake3_game_rel2,
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tvb, offset+1, 1, rel2);
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}
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offset += 2;
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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_quake3_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 = tvb_new_subset_remaining(tvb, offset);
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proto_tree *c_tree;
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if (*direction == DIR_C2S) {
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c_tree = proto_tree_add_subtree(game_tree, next_tvb,
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0, -1, ett_quake3_game_clc, NULL, "Client Commands");
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dissect_quake3_client_commands(next_tvb, pinfo, c_tree);
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}
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else {
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c_tree = proto_tree_add_subtree(game_tree, next_tvb,
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0, -1, ett_quake3_game_svc, NULL, "Server Commands");
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dissect_quake3_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_quake3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *quake3_tree = NULL;
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proto_item *dir_item = NULL;
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int direction;
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direction = DIR_UNKNOWN;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "QUAKE3");
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if (tree) {
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proto_item *quake3_item;
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quake3_item = proto_tree_add_item(tree, proto_quake3,
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tvb, 0, -1, ENC_NA);
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quake3_tree = proto_item_add_subtree(quake3_item, ett_quake3);
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dir_item = proto_tree_add_none_format(
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quake3_tree,
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hf_quake3_direction, tvb, 0, 0,
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"Direction: %s",
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val_to_str(direction,
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names_direction, "%u"));
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}
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if (tvb_get_ntohl(tvb, 0) == 0xffffffff) {
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col_set_str(pinfo->cinfo, COL_INFO, "Connectionless ");
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proto_tree_add_uint_format(quake3_tree,
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hf_quake3_connectionless,
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tvb, 0, 0, 1,
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"Type: Connectionless");
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dissect_quake3_ConnectionlessPacket(
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tvb, pinfo, quake3_tree, &direction);
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}
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else {
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col_set_str(pinfo->cinfo, COL_INFO, "Game ");
|
|
proto_tree_add_uint_format(quake3_tree,
|
|
hf_quake3_game,
|
|
tvb, 0, 0, 1,
|
|
"Type: Game");
|
|
dissect_quake3_GamePacket(
|
|
tvb, pinfo, quake3_tree, &direction);
|
|
}
|
|
if (direction != DIR_UNKNOWN && dir_item)
|
|
proto_item_set_text(dir_item,
|
|
"Direction: %s",
|
|
val_to_str(direction,
|
|
names_direction, "%u"));
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, val_to_str(direction,
|
|
names_direction, "%u"));
|
|
}
|
|
|
|
|
|
void proto_reg_handoff_quake3(void);
|
|
|
|
void
|
|
proto_register_quake3(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_quake3_direction,
|
|
{ "Direction", "quake3.direction",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"Packet Direction", HFILL }},
|
|
{ &hf_quake3_connectionless,
|
|
{ "Connectionless", "quake3.connectionless",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
{ &hf_quake3_game,
|
|
{ "Game", "quake3.game",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
{ &hf_quake3_connectionless_marker,
|
|
{ "Marker", "quake3.connectionless.marker",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
{ &hf_quake3_connectionless_text,
|
|
{ "Text", "quake3.connectionless.text",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
{ &hf_quake3_connectionless_command,
|
|
{ "Command", "quake3.connectionless.command",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
{ &hf_quake3_server_addr,
|
|
{ "Server Address", "quake3.server.addr",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"Server IP Address", HFILL }},
|
|
{ &hf_quake3_server_port,
|
|
{ "Server Port", "quake3.server.port",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Server UDP Port", HFILL }},
|
|
{ &hf_quake3_game_seq1,
|
|
{ "Sequence Number", "quake3.game.seq1",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Sequence number of the current packet", HFILL }},
|
|
{ &hf_quake3_game_rel1,
|
|
{ "Reliable", "quake3.game.rel1",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Packet is reliable and may be retransmitted", HFILL }},
|
|
{ &hf_quake3_game_seq2,
|
|
{ "Sequence Number", "quake3.game.seq2",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Sequence number of the last received packet", HFILL }},
|
|
{ &hf_quake3_game_rel2,
|
|
{ "Reliable", "quake3.game.rel2",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Packet was reliable and may be retransmitted", HFILL }},
|
|
{ &hf_quake3_game_qport,
|
|
{ "QPort", "quake3.game.qport",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Quake III Arena Client Port", HFILL }}
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_quake3,
|
|
&ett_quake3_connectionless,
|
|
&ett_quake3_connectionless_text,
|
|
&ett_quake3_server,
|
|
&ett_quake3_game,
|
|
&ett_quake3_game_seq1,
|
|
&ett_quake3_game_seq2,
|
|
&ett_quake3_game_clc,
|
|
&ett_quake3_game_svc
|
|
};
|
|
module_t *quake3_module;
|
|
|
|
proto_quake3 = proto_register_protocol("Quake III Arena Network Protocol",
|
|
"QUAKE3", "quake3");
|
|
proto_register_field_array(proto_quake3, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Register a configuration option for port */
|
|
quake3_module = prefs_register_protocol(proto_quake3,
|
|
proto_reg_handoff_quake3);
|
|
prefs_register_uint_preference(quake3_module, "udp.arena_port",
|
|
"Quake III Arena Server UDP Base Port",
|
|
"Set the UDP base port for the Quake III Arena Server",
|
|
10, &gbl_quake3_server_port);
|
|
prefs_register_uint_preference(quake3_module, "udp.master_port",
|
|
"Quake III Arena Master Server UDP Base Port",
|
|
"Set the UDP base port for the Quake III Arena Master Server",
|
|
10, &gbl_quake3_master_port);
|
|
}
|
|
|
|
|
|
void
|
|
proto_reg_handoff_quake3(void)
|
|
{
|
|
static gboolean initialized=FALSE;
|
|
static dissector_handle_t quake3_handle;
|
|
static guint server_port;
|
|
static guint master_port;
|
|
int i;
|
|
|
|
if (!initialized) {
|
|
quake3_handle = create_dissector_handle(dissect_quake3,
|
|
proto_quake3);
|
|
data_handle = find_dissector("data");
|
|
initialized=TRUE;
|
|
} else {
|
|
for (i=0;i<4;i++)
|
|
dissector_delete_uint("udp.port", server_port+i, quake3_handle);
|
|
for (i=0;i<4;i++)
|
|
dissector_delete_uint("udp.port", master_port+i, quake3_handle);
|
|
}
|
|
|
|
/* set port for future deletes */
|
|
server_port = gbl_quake3_server_port;
|
|
master_port = gbl_quake3_master_port;
|
|
|
|
/* add dissectors */
|
|
for (i=0;i<4;i++)
|
|
dissector_add_uint("udp.port", gbl_quake3_server_port + i,
|
|
quake3_handle);
|
|
for (i=0;i<4;i++)
|
|
dissector_add_uint("udp.port", gbl_quake3_master_port + i,
|
|
quake3_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|