diff options
author | Ronnie Sahlberg <ronnie_sahlberg@ozemail.com.au> | 2005-05-14 21:00:43 +0000 |
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committer | Ronnie Sahlberg <ronnie_sahlberg@ozemail.com.au> | 2005-05-14 21:00:43 +0000 |
commit | c07f0f0a4504f45c8cf5e33bcb73badc1ed4cc80 (patch) | |
tree | e638fb02aebb04558551090c5eed9b94641d6a6d | |
parent | 7effa95f95ed51378424b8d1351b8828a608c027 (diff) |
From Guillaume Chazarain
New protocol : ARMAGETRONAD dissector for the protcol used by the game of the same name
svn path=/trunk/; revision=14366
-rw-r--r-- | AUTHORS | 6 | ||||
-rw-r--r-- | epan/dissectors/Makefile.common | 1 | ||||
-rw-r--r-- | epan/dissectors/packet-armagetronad.c | 332 |
3 files changed, 337 insertions, 2 deletions
@@ -2333,11 +2333,13 @@ Francisco Alcoba <francisco.alcoba [AT] ericsson.com> { ASCII art version of VOIP call analysis } -Nils O. Selåsdal <noselasd@asgaard.homelinux.org> { +Nils O. Selåsdal <noselasd [AT] asgaard.homelinux.org> { 9P support } - +Guillaume Chazarain <guichaz [AT] yahoo.fr> { + Armagetronad support +} And assorted fixes and enhancements by the people listed above and by: diff --git a/epan/dissectors/Makefile.common b/epan/dissectors/Makefile.common index 899243455b..959f470650 100644 --- a/epan/dissectors/Makefile.common +++ b/epan/dissectors/Makefile.common @@ -91,6 +91,7 @@ DISSECTOR_SRC = \ packet-ap1394.c \ packet-app-pkix-cert.c \ packet-arcnet.c \ + packet-armagetronad.c \ packet-arp.c \ packet-aruba-adp.c \ packet-asap.c \ diff --git a/epan/dissectors/packet-armagetronad.c b/epan/dissectors/packet-armagetronad.c new file mode 100644 index 0000000000..194e618723 --- /dev/null +++ b/epan/dissectors/packet-armagetronad.c @@ -0,0 +1,332 @@ +/* packet-armagetronad.c + * Routines for the Armagetronad packet dissection + * Copyright 2005, Guillaume Chazarain <guichaz@yahoo.fr> + * + * $Id: README.developer 13227 2005-02-01 15:45:03Z jmayer $ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 Gerald Combs + * + * 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 <glib.h> + +#include <epan/packet.h> + +/* Initialize the protocol and registered fields */ +static int proto_armagetronad = -1; +static int hf_armagetronad_descriptor_id = -1; +static int hf_armagetronad_message_id = -1; +static int hf_armagetronad_data_len = -1; +static int hf_armagetronad_data = -1; +static int hf_armagetronad_sender_id = -1; +static int hf_armagetronad_msg_subtree = -1; + +/* Initialize the subtree pointers */ +static gint ett_armagetronad = -1; +static gint ett_message = -1; + +#define UDP_PORT_ARMAGETRONAD 4534 +#define UDP_PORT_MASTER 4533 + +/* + * The ACK packet is so common that we treat it + * differently: it has no MessageID + */ +#define ACK 1 + +/* + * CVS as of 05/05/2005 + * The list in src/network/Makefile.in does not seem up to date, + * so the numbers and names were retrieved at runtime using the + * 'nDescriptor* descriptors[MAXDESCRIPTORS]' array + */ +static value_string descriptors[] = { + {1, "ack"}, + {2, "req_info"}, + {3, "login_deny"}, + {4, "login_ignore"}, + {5, "login_accept"}, + {6, "login1"}, + {7, "logout"}, + {8, "sn_ConsoleOut"}, + {9, "client_cen"}, + {10, "version"}, + {11, "login2"}, + {20, "req_id"}, + {21, "id_req_handler"}, + {22, "net_destroy"}, + {23, "net_control"}, + {24, "net_sync"}, + {25, "ready to get objects"}, + {26, "net_clear"}, + {27, "sync_ack"}, + {28, "sync_msg"}, + {40, "password_request"}, + {41, "password_answer"}, + {50, "small_server"}, + {51, "big_server"}, + {52, "small_request"}, + {53, "big_request"}, + {60, "transfer config"}, + {200, "Chat"}, + {201, "ePlayerNetID"}, + {202, "player_removed_from_game"}, + {210, "eTimer"}, + {220, "eTeam"}, + {230, "vote cast"}, + {231, "Chat"}, + {300, "gNetPlayerWall"}, + {310, "game"}, + {311, "client_gamestate"}, + {320, "cycle"}, + {321, "destinaton"}, + {330, "gAIPlayer"}, + {331, "gAITeam"}, + {340, "winzone"}, + {0, NULL} +}; + +static gboolean is_armagetronad_packet(tvbuff_t * tvb) +{ + gint offset = 0; + + /* For each message in the frame */ + while (tvb_length_remaining(tvb, offset) > 2) { + guint16 data_len = tvb_get_ntohs(tvb, offset + 4) * 2; + +#if 0 + /* + * If the descriptor_id is not in the table it's possibly + * because the protocol evoluated, losing synchronization + * with the table, that's why we don't consider that as + * a heuristic + */ + if (!match_strval(tvb_get_ntohs(tvb, offset), descriptors)) + /* DescriptorID not found in the table */ + return FALSE; +#endif + + if (!tvb_bytes_exist(tvb, offset + 6, data_len)) + /* Advertised length too long */ + return FALSE; + + offset += 6 + data_len; + } + + /* The packed should end with a 2 bytes ID */ + return tvb_length_remaining(tvb, offset) == 2; +} + +static void +add_message_data(tvbuff_t * tvb, gint offset, guint16 data_len, + proto_tree * tree) +{ + guint16 *data = NULL; + + if (tree) + data = (guint16 *) tvb_memdup(tvb, offset, data_len); + + if (data) { + guint16 *ptr, *end = &data[data_len / 2]; + for (ptr = data; ptr != end; ptr++) { + /* + * There must be a better way to tell + * Ethereal not to stop on null bytes + * as the length is known + */ + gchar *bptr = (gchar *) ptr; + if (!bptr[0]) + bptr[0] = ' '; + + if (!bptr[1]) + bptr[1] = ' '; + + /* Armagetronad swaps unconditionally */ + *ptr = GUINT16_SWAP_LE_BE(*ptr); + } + + proto_tree_add_string(tree, hf_armagetronad_data, tvb, offset, + data_len, (gchar *) data); + + g_free(data); + data = NULL; + } else + proto_tree_add_item(tree, hf_armagetronad_data, tvb, offset, + data_len, FALSE); +} + +static gint add_message(tvbuff_t * tvb, gint offset, proto_tree * tree, + GString * info) +{ + guint16 descriptor_id, message_id, data_len; + proto_item *msg; + proto_tree *msg_tree; + const gchar *descriptor; + + descriptor_id = tvb_get_ntohs(tvb, offset); + message_id = tvb_get_ntohs(tvb, offset + 2); + data_len = tvb_get_ntohs(tvb, offset + 4) * 2; + + /* Message subtree */ + descriptor = val_to_str(descriptor_id, descriptors, "Unknown (%u)"); + if (descriptor_id == ACK) + msg = proto_tree_add_none_format(tree, + hf_armagetronad_msg_subtree, + tvb, offset, data_len + 6, + "ACK %d messages", + data_len / 2); + else + msg = proto_tree_add_none_format(tree, + hf_armagetronad_msg_subtree, + tvb, offset, data_len + 6, + "Message 0x%04x [%s]", + message_id, descriptor); + + msg_tree = proto_item_add_subtree(msg, ett_message); + + /* DescriptorID field */ + proto_tree_add_item(msg_tree, hf_armagetronad_descriptor_id, tvb, + offset, 2, FALSE); + if (info) + g_string_sprintfa(info, "%s, ", descriptor); + + /* MessageID field */ + proto_tree_add_item(msg_tree, hf_armagetronad_message_id, tvb, + offset + 2, 2, FALSE); + + /* DataLen field */ + proto_tree_add_item(msg_tree, hf_armagetronad_data_len, tvb, + offset + 4, 2, FALSE); + + /* Data field */ + add_message_data(tvb, offset + 6, data_len, msg_tree); + + return data_len + 6; +} + +/* Code to actually dissect the packets */ +static gint +dissect_armagetronad(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree) +{ + proto_item *ti; + proto_tree *armagetronad_tree; + guint16 sender; + gint offset = 0; + GString *info; + + if (!is_armagetronad_packet(tvb)) + return 0; + + info = check_col(pinfo->cinfo, COL_INFO) ? g_string_new("") : NULL; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "Armagetronad"); + + if (info) + col_clear(pinfo->cinfo, COL_INFO); + + ti = proto_tree_add_item(tree, proto_armagetronad, tvb, 0, -1, FALSE); + armagetronad_tree = proto_item_add_subtree(ti, ett_armagetronad); + + /* For each message in the frame */ + while (tvb_length_remaining(tvb, offset) > 2) + offset += add_message(tvb, offset, armagetronad_tree, info); + + /* After the messages, comes the SenderID */ + sender = tvb_get_ntohs(tvb, offset); + proto_tree_add_item(ti, hf_armagetronad_sender_id, tvb, offset, 2, + FALSE); + + if (info) { + gsize new_len = info->len - 2; /* Remove the trailing ", " */ + if (new_len > 0) + g_string_truncate(info, new_len); + else + g_string_assign(info, "No message"); + + col_add_fstr(pinfo->cinfo, COL_INFO, "[%s] from 0x%04x", + info->str, sender); + g_string_free(info, TRUE); + } + + return offset + 2; +} + +void proto_register_armagetronad(void) +{ + static hf_register_info hf[] = { + {&hf_armagetronad_descriptor_id, + {"Descriptor", "armagetronad.descriptor_id", + FT_UINT16, BASE_DEC, VALS(descriptors), 0x0, + "The ID of the descriptor (the command)", HFILL} + }, + {&hf_armagetronad_message_id, + {"MessageID", "armagetronad.message_id", + FT_UINT16, BASE_HEX, NULL, 0x0, + "The ID of the message (to ack it)", HFILL} + }, + {&hf_armagetronad_data_len, + {"DataLen", "armagetronad.data_len", + FT_UINT16, BASE_DEC, NULL, 0x0, + "The length of the data (in shorts)", HFILL} + }, + {&hf_armagetronad_data, + {"Data", "armagetronad.data", + FT_STRING, BASE_HEX, NULL, 0x0, + "The actual data (array of shorts in network order)", HFILL} + }, + {&hf_armagetronad_sender_id, + {"SenderID", "armagetronad.sender_id", + FT_UINT16, BASE_HEX, NULL, 0x0, + "The ID of the sender (0x0000 for the server)", HFILL} + }, + {&hf_armagetronad_msg_subtree, + {"Message", "armagetronad.message", + FT_NONE, 0, NULL, 0x0, + "A message", HFILL} + } + }; + + static gint *ett[] = { + &ett_armagetronad, + &ett_message + }; + + proto_armagetronad = + proto_register_protocol("The Armagetron Advanced OpenGL Tron clone", + "Armagetronad", "armagetronad"); + + proto_register_field_array(proto_armagetronad, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + new_register_dissector("armagetronad", dissect_armagetronad, + proto_armagetronad); +} + +void proto_reg_handoff_armagetronad(void) +{ + dissector_handle_t armagetronad_handle; + + armagetronad_handle = find_dissector("armagetronad"); + + dissector_add("udp.port", UDP_PORT_ARMAGETRONAD, armagetronad_handle); + dissector_add("udp.port", UDP_PORT_MASTER, armagetronad_handle); +} |