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 1.26 2003/03/01 00:09:00 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 #include <string.h>
  35 #include <glib.h>
  36 #include <epan/packet.h>
  37
  38 static int proto_yhoo = -1;
  39 static int hf_yhoo_version = -1;
  40 static int hf_yhoo_len = -1;
  41 static int hf_yhoo_service = -1;
  42 static int hf_yhoo_connection_id = -1;
  43 static int hf_yhoo_magic_id = -1;
  44 static int hf_yhoo_unknown1 = -1;
  45 static int hf_yhoo_msgtype = -1;
  46 static int hf_yhoo_nick1 = -1;
  47 static int hf_yhoo_nick2 = -1;
  48 static int hf_yhoo_content = -1;
  49
  50 static gint ett_yhoo = -1;
  51
  52 #define TCP_PORT_YHOO   5050
  53
  54 /* This is from yahoolib.h from gtkyahoo */
  55
  56 /* Service constants */
  57 #define YAHOO_SERVICE_LOGON             1
  58 #define YAHOO_SERVICE_LOGOFF            2
  59 #define YAHOO_SERVICE_ISAWAY            3
  60 #define YAHOO_SERVICE_ISBACK            4
  61 #define YAHOO_SERVICE_IDLE              5
  62 #define YAHOO_SERVICE_MESSAGE           6
  63 #define YAHOO_SERVICE_IDACT             7
  64 #define YAHOO_SERVICE_IDDEACT           8
  65 #define YAHOO_SERVICE_MAILSTAT          9
  66 #define YAHOO_SERVICE_USERSTAT          10
  67 #define YAHOO_SERVICE_NEWMAIL           11
  68 #define YAHOO_SERVICE_CHATINVITE        12
  69 #define YAHOO_SERVICE_CALENDAR          13
  70 #define YAHOO_SERVICE_NEWPERSONALMAIL   14
  71 #define YAHOO_SERVICE_NEWCONTACT        15
  72 #define YAHOO_SERVICE_ADDIDENT          16
  73 #define YAHOO_SERVICE_ADDIGNORE         17
  74 #define YAHOO_SERVICE_PING              18
  75 #define YAHOO_SERVICE_GROUPRENAME       19
  76 #define YAHOO_SERVICE_SYSMESSAGE        20
  77 #define YAHOO_SERVICE_PASSTHROUGH2      22
  78 #define YAHOO_SERVICE_CONFINVITE        24
  79 #define YAHOO_SERVICE_CONFLOGON         25
  80 #define YAHOO_SERVICE_CONFDECLINE       26
  81 #define YAHOO_SERVICE_CONFLOGOFF        27
  82 #define YAHOO_SERVICE_CONFADDINVITE     28
  83 #define YAHOO_SERVICE_CONFMSG           29
  84 #define YAHOO_SERVICE_CHATLOGON         30
  85 #define YAHOO_SERVICE_CHATLOGOFF        31
  86 #define YAHOO_SERVICE_CHATMSG           32
  87 #define YAHOO_SERVICE_FILETRANSFER      70
  88
  89 /* Message flags */
  90 #define YAHOO_MSGTYPE_NONE      0
  91 #define YAHOO_MSGTYPE_NORMAL    1
  92 #define YAHOO_MSGTYPE_BOUNCE    2
  93 #define YAHOO_MSGTYPE_STATUS    4
  94 #define YAHOO_MSGTYPE_OFFLINE   1515563606      /* yuck! */
  95
  96 struct yahoo_rawpacket
  97 {
  98         char version[8];                /* 7 chars and trailing null */
  99         unsigned char len[4];           /* length - little endian */
 100         unsigned char service[4];       /* service - little endian */
 101         unsigned char connection_id[4]; /* connection number - little endian */
 102         unsigned char magic_id[4];      /* magic number used for http session */
 103         unsigned char unknown1[4];
 104         unsigned char msgtype[4];
 105         char nick1[36];
 106         char nick2[36];
 107         char content[1];                /* was zero, had problems with aix xlc */
 108 };
 109
 110 static const value_string yhoo_service_vals[] = {
 111         {YAHOO_SERVICE_LOGON, "Pager Logon"},
 112         {YAHOO_SERVICE_LOGOFF, "Pager Logoff"},
 113         {YAHOO_SERVICE_ISAWAY, "Is Away"},
 114         {YAHOO_SERVICE_ISBACK, "Is Back"},
 115         {YAHOO_SERVICE_IDLE, "Idle"},
 116         {YAHOO_SERVICE_MESSAGE, "Message"},
 117         {YAHOO_SERVICE_IDACT, "Activate Identity"},
 118         {YAHOO_SERVICE_IDDEACT, "Deactivate Identity"},
 119         {YAHOO_SERVICE_MAILSTAT, "Mail Status"},
 120         {YAHOO_SERVICE_USERSTAT, "User Status"},
 121         {YAHOO_SERVICE_NEWMAIL, "New Mail"},
 122         {YAHOO_SERVICE_CHATINVITE, "Chat Invitation"},
 123         {YAHOO_SERVICE_CALENDAR, "Calendar Reminder"},
 124         {YAHOO_SERVICE_NEWPERSONALMAIL, "New Personals Mail"},
 125         {YAHOO_SERVICE_NEWCONTACT, "New Friend"},
 126         {YAHOO_SERVICE_GROUPRENAME, "Group Renamed"},
 127         {YAHOO_SERVICE_ADDIDENT, "Add Identity"},
 128         {YAHOO_SERVICE_ADDIGNORE, "Add Ignore"},
 129         {YAHOO_SERVICE_PING, "Ping"},
 130         {YAHOO_SERVICE_SYSMESSAGE, "System Message"},
 131         {YAHOO_SERVICE_CONFINVITE, "Conference Invitation"},
 132         {YAHOO_SERVICE_CONFLOGON, "Conference Logon"},
 133         {YAHOO_SERVICE_CONFDECLINE, "Conference Decline"},
 134         {YAHOO_SERVICE_CONFLOGOFF, "Conference Logoff"},
 135         {YAHOO_SERVICE_CONFMSG, "Conference Message"},
 136         {YAHOO_SERVICE_CONFADDINVITE, "Conference Additional Invitation"},
 137         {YAHOO_SERVICE_CHATLOGON, "Chat Logon"},
 138         {YAHOO_SERVICE_CHATLOGOFF, "Chat Logoff"},
 139         {YAHOO_SERVICE_CHATMSG, "Chat Message"},
 140         {YAHOO_SERVICE_FILETRANSFER, "File Transfer"},
 141         {YAHOO_SERVICE_PASSTHROUGH2, "Passthrough 2"},
 142         {0, NULL}
 143 };
 144
 145 static const value_string yhoo_msgtype_vals[] = {
 146         {YAHOO_MSGTYPE_NONE, "None"},
 147         {YAHOO_MSGTYPE_NORMAL, "Normal"},
 148         {YAHOO_MSGTYPE_BOUNCE, "Bounce"},
 149         {YAHOO_MSGTYPE_STATUS, "Status Update"},
 150         {YAHOO_MSGTYPE_OFFLINE, "Request Offline"},
 151         {0, NULL}
 152 };
 153
 154 static gboolean
 155 dissect_yhoo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 156 {
 157         proto_tree      *yhoo_tree, *ti;
 158         int offset = 0;
 159
 160         if (pinfo->srcport != TCP_PORT_YHOO && pinfo->destport != TCP_PORT_YHOO) {
 161                 /* Not the Yahoo port - not a Yahoo Messenger packet. */
 162                 return FALSE;
 163         }
 164
 165         /* get at least a full packet structure */
 166         if ( !tvb_bytes_exist(tvb, 0, sizeof(struct yahoo_rawpacket)) ) {
 167                 /* Not enough data captured; maybe it is a Yahoo
 168                    Messenger packet, but it contains too little data to
 169                    tell. */
 170                 return FALSE;
 171         }
 172
 173         if (memcmp(tvb_get_ptr(tvb, offset, 4), "YPNS", 4) != 0 &&
 174             memcmp(tvb_get_ptr(tvb, offset, 4), "YHOO", 4) != 0) {
 175                 /* Not a Yahoo Messenger packet. */
 176                 return FALSE;
 177         }
 178
 179         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 180                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "YHOO");
 181
 182         offset = 0;
 183         if (check_col(pinfo->cinfo, COL_INFO)) {
 184                 col_add_fstr(pinfo->cinfo, COL_INFO,
 185                         "%s: %s",
 186                         ( strncmp(tvb_get_ptr(tvb, offset + 0, 4), "YPNS", 4) == 0 ) ? "Request" : "Response",
 187                         val_to_str(tvb_get_letohl(tvb, offset + 12),
 188                                  yhoo_service_vals, "Unknown Service: %u")
 189                 );
 190         }
 191
 192         if (tree) {
 193                 ti = proto_tree_add_item(tree, proto_yhoo, tvb, offset, -1,
 194                         FALSE);
 195                 yhoo_tree = proto_item_add_subtree(ti, ett_yhoo);
 196
 197                 proto_tree_add_item(yhoo_tree, hf_yhoo_version, tvb,
 198                         offset, 8, TRUE);
 199                 offset += 8;
 200
 201                 proto_tree_add_item(yhoo_tree, hf_yhoo_len, tvb,
 202                         offset, 4, TRUE);
 203                 offset += 4;
 204
 205                 proto_tree_add_item(yhoo_tree, hf_yhoo_service, tvb,
 206                         offset, 4, TRUE);
 207                 offset += 4;
 208
 209                 proto_tree_add_item(yhoo_tree, hf_yhoo_connection_id, tvb,
 210                         offset, 4, TRUE);
 211                 offset += 4;
 212
 213                 proto_tree_add_item(yhoo_tree, hf_yhoo_magic_id, tvb,
 214                         offset, 4, TRUE);
 215                 offset += 4;
 216
 217                 proto_tree_add_item(yhoo_tree, hf_yhoo_unknown1, tvb,
 218                         offset, 4, TRUE);
 219                 offset += 4;
 220
 221                 proto_tree_add_item(yhoo_tree, hf_yhoo_msgtype, tvb,
 222                         offset, 4, TRUE);
 223                 offset += 4;
 224
 225                 proto_tree_add_item(yhoo_tree, hf_yhoo_nick1, tvb,
 226                         offset, 36, TRUE);
 227                 offset += 36;
 228
 229                 proto_tree_add_item(yhoo_tree, hf_yhoo_nick2, tvb,
 230                         offset, 36, TRUE);
 231                 offset += 36;
 232
 233                 proto_tree_add_item(yhoo_tree, hf_yhoo_content, tvb, -1,
 234                         offset, TRUE);
 235         }
 236
 237         return TRUE;
 238 }
 239
 240 void
 241 proto_register_yhoo(void)
 242 {
 243         static hf_register_info hf[] = {
 244                         { &hf_yhoo_service, {
 245                                 "Service Type", "yhoo.service", FT_UINT32, BASE_DEC,
 246                                 VALS(yhoo_service_vals), 0, "Service Type", HFILL }},
 247                         { &hf_yhoo_msgtype, {
 248                                 "Message Type", "yhoo.msgtype", FT_UINT32, BASE_DEC,
 249                                 VALS(yhoo_msgtype_vals), 0, "Message Type Flags", HFILL }},
 250                         { &hf_yhoo_connection_id, {
 251                                 "Connection ID", "yhoo.connection_id", FT_UINT32, BASE_HEX,
 252                                 NULL, 0, "Connection ID", HFILL }},
 253                         { &hf_yhoo_magic_id, {
 254                                 "Magic ID", "yhoo.magic_id", FT_UINT32, BASE_HEX,
 255                                 NULL, 0, "Magic ID", HFILL }},
 256                         { &hf_yhoo_unknown1, {
 257                                 "Unknown 1", "yhoo.unknown1", FT_UINT32, BASE_HEX,
 258                                 NULL, 0, "Unknown 1", HFILL }},
 259                         { &hf_yhoo_len, {
 260                                 "Packet Length", "yhoo.len", FT_UINT32, BASE_DEC,
 261                                 NULL, 0, "Packet Length", HFILL }},
 262                         { &hf_yhoo_nick1, {
 263                                 "Real Nick (nick1)", "yhoo.nick1", FT_STRING, 0,
 264                                 NULL, 0, "Real Nick (nick1)", HFILL }},
 265                         { &hf_yhoo_nick2, {
 266                                 "Active Nick (nick2)", "yhoo.nick2", FT_STRING, 0,
 267                                 NULL, 0, "Active Nick (nick2)", HFILL }},
 268                         { &hf_yhoo_content, {
 269                                 "Content", "yhoo.content", FT_STRING, 0,
 270                                 NULL, 0, "Data portion of the packet", HFILL }},
 271                         { &hf_yhoo_version, {
 272                                 "Version", "yhoo.version", FT_STRING, 0,
 273                                 NULL, 0, "Packet version identifier", HFILL }},
 274         };
 275         static gint *ett[] = {
 276                 &ett_yhoo,
 277         };
 278
 279         proto_yhoo = proto_register_protocol("Yahoo Messenger Protocol",
 280             "YHOO", "yhoo");
 281
 282         proto_register_field_array(proto_yhoo, hf, array_length(hf));
 283
 284         proto_register_subtree_array(ett, array_length(ett));
 285 }
 286
 287 void
 288 proto_reg_handoff_yhoo(void)
 289 {
 290         /*
 291          * DO NOT register for port 5050, as that's used by the
 292          * old and new Yahoo messenger protocols.
 293          *
 294          * Just register as a heuristic TCP dissector, and reject stuff
 295          * not to or from that port.
 296          */
 297         heur_dissector_add("tcp", dissect_yhoo, proto_yhoo);
 298 }