packet-yhoo.c

   1 /* packet-yhoo.c
   2  * Routines for yahoo messenger packet dissection
   3  * Copyright 1999, Nathan Neulinger <nneul@umr.edu>
   4  *
   5  * $Id: packet-yhoo.c,v 1.18 2001/07/16 06:09:02 guy Exp $
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@ethereal.com>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * Copied from packet-tftp.c
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <stdio.h>
  33
  34 #ifdef HAVE_SYS_TYPES_H
  35 # include <sys/types.h>
  36 #endif
  37
  38 #ifdef HAVE_NETINET_IN_H
  39 # include <netinet/in.h>
  40 #endif
  41
  42 #include <string.h>
  43 #include <glib.h>
  44 #include "packet.h"
  45 #include "packet-yhoo.h"
  46
  47 static int proto_yhoo = -1;
  48 static int hf_yhoo_version = -1;
  49 static int hf_yhoo_len = -1;
  50 static int hf_yhoo_service = -1;
  51 static int hf_yhoo_connection_id = -1;
  52 static int hf_yhoo_magic_id = -1;
  53 static int hf_yhoo_unknown1 = -1;
  54 static int hf_yhoo_msgtype = -1;
  55 static int hf_yhoo_nick1 = -1;
  56 static int hf_yhoo_nick2 = -1;
  57 static int hf_yhoo_content = -1;
  58
  59 static gint ett_yhoo = -1;
  60
  61 #define TCP_PORT_YHOO   5050
  62
  63 static const value_string yhoo_service_vals[] = {
  64         {YAHOO_SERVICE_LOGON, "Pager Logon"},
  65         {YAHOO_SERVICE_LOGOFF, "Pager Logoff"},
  66         {YAHOO_SERVICE_ISAWAY, "Is Away"},
  67         {YAHOO_SERVICE_ISBACK, "Is Back"},
  68         {YAHOO_SERVICE_IDLE, "Idle"},
  69         {YAHOO_SERVICE_MESSAGE, "Message"},
  70         {YAHOO_SERVICE_IDACT, "Activate Identity"},
  71         {YAHOO_SERVICE_IDDEACT, "Deactivate Identity"},
  72         {YAHOO_SERVICE_MAILSTAT, "Mail Status"},
  73         {YAHOO_SERVICE_USERSTAT, "User Status"},
  74         {YAHOO_SERVICE_NEWMAIL, "New Mail"},
  75         {YAHOO_SERVICE_CHATINVITE, "Chat Invitation"},
  76         {YAHOO_SERVICE_CALENDAR, "Calendar Reminder"},
  77         {YAHOO_SERVICE_NEWPERSONALMAIL, "New Personals Mail"},
  78         {YAHOO_SERVICE_NEWCONTACT, "New Friend"},
  79         {YAHOO_SERVICE_GROUPRENAME, "Group Renamed"},
  80         {YAHOO_SERVICE_ADDIDENT, "Add Identity"},
  81         {YAHOO_SERVICE_ADDIGNORE, "Add Ignore"},
  82         {YAHOO_SERVICE_PING, "Ping"},
  83         {YAHOO_SERVICE_SYSMESSAGE, "System Message"},
  84         {YAHOO_SERVICE_CONFINVITE, "Conference Invitation"},
  85         {YAHOO_SERVICE_CONFLOGON, "Conference Logon"},
  86         {YAHOO_SERVICE_CONFDECLINE, "Conference Decline"},
  87         {YAHOO_SERVICE_CONFLOGOFF, "Conference Logoff"},
  88         {YAHOO_SERVICE_CONFMSG, "Conference Message"},
  89         {YAHOO_SERVICE_CONFADDINVITE, "Conference Additional Invitation"},
  90         {YAHOO_SERVICE_CHATLOGON, "Chat Logon"},
  91         {YAHOO_SERVICE_CHATLOGOFF, "Chat Logoff"},
  92         {YAHOO_SERVICE_CHATMSG, "Chat Message"},
  93         {YAHOO_SERVICE_FILETRANSFER, "File Transfer"},
  94         {YAHOO_SERVICE_PASSTHROUGH2, "Passthrough 2"},
  95         {0, NULL}
  96 };
  97
  98 static const value_string yhoo_msgtype_vals[] = {
  99         {YAHOO_MSGTYPE_NONE, "None"},
 100         {YAHOO_MSGTYPE_NORMAL, "Normal"},
 101         {YAHOO_MSGTYPE_BOUNCE, "Bounce"},
 102         {YAHOO_MSGTYPE_STATUS, "Status Update"},
 103         {YAHOO_MSGTYPE_OFFLINE, "Request Offline"},
 104         {0, NULL}
 105 };
 106
 107 static gboolean
 108 dissect_yhoo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 109 {
 110         proto_tree      *yhoo_tree, *ti;
 111         int offset = 0;
 112         int length = 0;
 113
 114         if (!proto_is_protocol_enabled(proto_yhoo)) {
 115                 return FALSE;
 116         }
 117
 118         if (pinfo->srcport != TCP_PORT_YHOO && pinfo->destport != TCP_PORT_YHOO) {
 119                 /* Not the Yahoo port - not a Yahoo Messenger packet. */
 120                 return FALSE;
 121         }
 122
 123         /* get at least a full packet structure */
 124         if ( !tvb_bytes_exist(tvb, 0, sizeof(struct yahoo_rawpacket)) ) {
 125                 /* Not enough data captured; maybe it is a Yahoo
 126                    Messenger packet, but it contains too little data to
 127                    tell. */
 128                 return FALSE;
 129         }
 130
 131         length = tvb_length(tvb);
 132
 133         if (memcmp(tvb_get_ptr(tvb, offset, 4), "YPNS", 4) != 0 &&
 134             memcmp(tvb_get_ptr(tvb, offset, 4), "YHOO", 4) != 0) {
 135                 /* Not a Yahoo Messenger packet. */
 136                 return FALSE;
 137         }
 138
 139         if (check_col(pinfo->fd, COL_PROTOCOL))
 140                 col_set_str(pinfo->fd, COL_PROTOCOL, "YHOO");
 141
 142         offset = 0;
 143         if (check_col(pinfo->fd, COL_INFO)) {
 144                 col_add_fstr(pinfo->fd, COL_INFO,
 145                         "%s: %s",
 146                         ( strncmp(tvb_get_ptr(tvb, offset + 0, 4), "YPNS", 4) == 0 ) ? "Request" : "Response",
 147                         val_to_str(tvb_get_letohl(tvb, offset + 12),
 148                                  yhoo_service_vals, "Unknown Service: %u")
 149                 );
 150         }
 151
 152         if (tree) {
 153                 ti = proto_tree_add_item(tree, proto_yhoo, tvb, offset,
 154                         tvb_length_remaining(tvb, offset), FALSE);
 155                 yhoo_tree = proto_item_add_subtree(ti, ett_yhoo);
 156
 157                 proto_tree_add_item(yhoo_tree, hf_yhoo_version, tvb,
 158                         offset, 8, TRUE);
 159                 offset += 8;
 160
 161                 proto_tree_add_item(yhoo_tree, hf_yhoo_len, tvb,
 162                         offset, 4, TRUE);
 163                 offset += 4;
 164
 165                 proto_tree_add_item(yhoo_tree, hf_yhoo_service, tvb,
 166                         offset, 4, TRUE);
 167                 offset += 4;
 168
 169                 proto_tree_add_item(yhoo_tree, hf_yhoo_connection_id, tvb,
 170                         offset, 4, TRUE);
 171                 offset += 4;
 172
 173                 proto_tree_add_item(yhoo_tree, hf_yhoo_magic_id, tvb,
 174                         offset, 4, TRUE);
 175                 offset += 4;
 176
 177                 proto_tree_add_item(yhoo_tree, hf_yhoo_unknown1, tvb,
 178                         offset, 4, TRUE);
 179                 offset += 4;
 180
 181                 proto_tree_add_item(yhoo_tree, hf_yhoo_msgtype, tvb,
 182                         offset, 4, TRUE);
 183                 offset += 4;
 184
 185                 proto_tree_add_item(yhoo_tree, hf_yhoo_nick1, tvb,
 186                         offset, 36, TRUE);
 187                 offset += 36;
 188
 189                 proto_tree_add_item(yhoo_tree, hf_yhoo_nick2, tvb,
 190                         offset, 36, TRUE);
 191                 offset += 36;
 192
 193                 proto_tree_add_item(yhoo_tree, hf_yhoo_content, tvb,
 194                         offset, length-offset, TRUE);
 195         }
 196
 197         return TRUE;
 198 }
 199
 200 void
 201 proto_register_yhoo(void)
 202 {
 203         static hf_register_info hf[] = {
 204                         { &hf_yhoo_service, {
 205                                 "Service Type", "yhoo.service", FT_UINT32, BASE_DEC,
 206                                 VALS(yhoo_service_vals), 0, "Service Type", HFILL }},
 207                         { &hf_yhoo_msgtype, {
 208                                 "Message Type", "yhoo.msgtype", FT_UINT32, BASE_DEC,
 209                                 VALS(yhoo_msgtype_vals), 0, "Message Type Flags", HFILL }},
 210                         { &hf_yhoo_connection_id, {
 211                                 "Connection ID", "yhoo.connection_id", FT_UINT32, BASE_HEX,
 212                                 NULL, 0, "Connection ID", HFILL }},
 213                         { &hf_yhoo_magic_id, {
 214                                 "Magic ID", "yhoo.magic_id", FT_UINT32, BASE_HEX,
 215                                 NULL, 0, "Magic ID", HFILL }},
 216                         { &hf_yhoo_unknown1, {
 217                                 "Unknown 1", "yhoo.unknown1", FT_UINT32, BASE_HEX,
 218                                 NULL, 0, "Unknown 1", HFILL }},
 219                         { &hf_yhoo_len, {
 220                                 "Packet Length", "yhoo.len", FT_UINT32, BASE_DEC,
 221                                 NULL, 0, "Packet Length", HFILL }},
 222                         { &hf_yhoo_nick1, {
 223                                 "Real Nick (nick1)", "yhoo.nick1", FT_STRING, 0,
 224                                 NULL, 0, "Real Nick (nick1)", HFILL }},
 225                         { &hf_yhoo_nick2, {
 226                                 "Active Nick (nick2)", "yhoo.nick2", FT_STRING, 0,
 227                                 NULL, 0, "Active Nick (nick2)", HFILL }},
 228                         { &hf_yhoo_content, {
 229                                 "Content", "yhoo.content", FT_STRING, 0,
 230                                 NULL, 0, "Data portion of the packet", HFILL }},
 231                         { &hf_yhoo_version, {
 232                                 "Version", "yhoo.version", FT_STRING, 0,
 233                                 NULL, 0, "Packet version identifier", HFILL }},
 234         };
 235         static gint *ett[] = {
 236                 &ett_yhoo,
 237         };
 238
 239         proto_yhoo = proto_register_protocol("Yahoo Messenger Protocol",
 240             "YHOO", "yhoo");
 241
 242         proto_register_field_array(proto_yhoo, hf, array_length(hf));
 243
 244         proto_register_subtree_array(ett, array_length(ett));
 245 }
 246
 247 void
 248 proto_reg_handoff_yhoo(void)
 249 {
 250         heur_dissector_add("tcp", dissect_yhoo, proto_yhoo);
 251 }