epan/dissectors/packet-aim-chat.c

   1 /* packet-aim-chat.c
   2  * Routines for AIM Instant Messenger (OSCAR) dissection, SNAC Chat
   3  * Copyright 2004, Jelmer Vernooij <jelmer@samba.org>
   4  * Copyright 2000, Ralf Hoelzer <ralf@well.com>
   5  *
   6  * $Id$
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <glib.h>
  30
  31 #include <epan/packet.h>
  32 #include <epan/strutil.h>
  33 #include <epan/wmem/wmem.h>
  34
  35 #include "packet-tcp.h"
  36 #include "packet-aim.h"
  37
  38 void proto_register_aim_chat(void);
  39 void proto_reg_handoff_aim_chat(void);
  40
  41 /* SNAC families */
  42 #define FAMILY_CHAT       0x000E
  43
  44 #define AIM_CHAT_TLV_BROWSABLE_TREE             0x001
  45 #define AIM_CHAT_TLV_CLASS_EXCLUSIVE            0x002
  46 #define AIM_CHAT_TLV_MAX_CONCURRENT_ROOMS       0x003
  47 #define AIM_CHAT_TLV_MAX_ROOM_NAME_LEN          0x004
  48 #define AIM_CHAT_TLV_ROOT_ROOMS                         0x005
  49 #define AIM_CHAT_TLV_SEARCH_TAGS                        0x006
  50 #define AIM_CHAT_TLV_CHILD_ROOMS                        0x065
  51 #define AIM_CHAT_TLV_CONTAINS_USER_CLASS        0x066
  52 #define AIM_CHAT_TLV_CONTAINS_USER_ARRAY        0x067
  53
  54 #if 0
  55 static const aim_tlv aim_chat_tlvs[] _U_ = {
  56         { AIM_CHAT_TLV_BROWSABLE_TREE, "Browsable tree", dissect_aim_tlv_value_bytes },
  57         { AIM_CHAT_TLV_CLASS_EXCLUSIVE, "Exclusively for class", dissect_aim_tlv_value_userclass },
  58         { AIM_CHAT_TLV_MAX_CONCURRENT_ROOMS, "Max. number of concurrent rooms", dissect_aim_tlv_value_uint8 },
  59         { AIM_CHAT_TLV_MAX_ROOM_NAME_LEN, "Max. length of room name", dissect_aim_tlv_value_uint8 },
  60         { AIM_CHAT_TLV_ROOT_ROOMS, "Root Rooms", dissect_aim_tlv_value_bytes },
  61         { AIM_CHAT_TLV_SEARCH_TAGS, "Search Tags", dissect_aim_tlv_value_bytes },
  62         { AIM_CHAT_TLV_CHILD_ROOMS, "Child Rooms", dissect_aim_tlv_value_bytes },
  63         { AIM_CHAT_TLV_CONTAINS_USER_CLASS, "Contains User Class", dissect_aim_tlv_value_bytes },
  64         { AIM_CHAT_TLV_CONTAINS_USER_ARRAY, "Contains User Array", dissect_aim_tlv_value_bytes },
  65         { 0, NULL, NULL }
  66 };
  67 #endif
  68
  69 /* Initialize the protocol and registered fields */
  70 static int proto_aim_chat = -1;
  71
  72 /* Initialize the subtree pointers */
  73 static gint ett_aim_chat          = -1;
  74
  75 static int dissect_aim_chat_userinfo_list(tvbuff_t *tvb, packet_info *pinfo, proto_tree *chat_tree)
  76 {
  77         int offset = 0;
  78         while(tvb_length_remaining(tvb, offset) > 0) {
  79                 offset = dissect_aim_userinfo(tvb, pinfo, offset, chat_tree);
  80         }
  81         return offset;
  82 }
  83
  84 static int dissect_aim_chat_outgoing_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *chat_tree _U_)
  85 {
  86         guchar *buddyname;
  87         guchar *msg;
  88         int buddyname_length;
  89
  90         buddyname=(guchar *)wmem_alloc(wmem_packet_scope(), MAX_BUDDYNAME_LENGTH+1);
  91         msg=(guchar *)wmem_alloc(wmem_packet_scope(), 1000);
  92         buddyname_length = aim_get_buddyname( buddyname, tvb, 30, 31 );
  93
  94         /* channel message from client */
  95         aim_get_message( msg, tvb, 40 + buddyname_length, tvb_length(tvb)
  96                                          - 40 - buddyname_length );
  97
  98         col_append_fstr(pinfo->cinfo, COL_INFO, " -> %s", msg);
  99
 100         return tvb_length(tvb);
 101 }
 102
 103
 104 static int dissect_aim_chat_incoming_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *chat_tree)
 105 {
 106         guchar *buddyname;
 107         guchar *msg;
 108         /* channel message to client */
 109         int buddyname_length;
 110
 111         buddyname=(guchar *)wmem_alloc(wmem_packet_scope(), MAX_BUDDYNAME_LENGTH+1);
 112         msg=(guchar *)wmem_alloc(wmem_packet_scope(), 1000);
 113         buddyname_length = aim_get_buddyname( buddyname, tvb, 30, 31 );
 114
 115         aim_get_message( msg, tvb, 36 + buddyname_length, tvb_length(tvb)
 116                                          - 36 - buddyname_length );
 117
 118         col_append_fstr(pinfo->cinfo, COL_INFO, "from: %s", buddyname);
 119         col_append_fstr(pinfo->cinfo, COL_INFO, " -> %s", msg);
 120
 121         if(chat_tree) {
 122                 proto_tree_add_text(chat_tree, tvb, 31, buddyname_length,
 123                                                         "Screen Name: %s",
 124                                                         format_text(buddyname, buddyname_length));
 125         }
 126         return tvb_length(tvb);
 127 }
 128
 129 static const aim_subtype aim_fnac_family_chat[] = {
 130         { 0x0001, "Error", dissect_aim_snac_error },
 131         { 0x0002, "Room Info Update", NULL },
 132         { 0x0003, "User Join", dissect_aim_chat_userinfo_list },
 133         { 0x0004, "User Leave", dissect_aim_chat_userinfo_list },
 134         { 0x0005, "Outgoing Message", dissect_aim_chat_outgoing_msg },
 135         { 0x0006, "Incoming Message", dissect_aim_chat_incoming_msg },
 136         { 0x0007, "Evil Request", NULL },
 137         { 0x0008, "Evil Reply", NULL },
 138         { 0, NULL, NULL }
 139 };
 140
 141 /* Register the protocol with Wireshark */
 142 void
 143 proto_register_aim_chat(void)
 144 {
 145
 146 /* Setup list of header fields */
 147 #if 0 /* FIXME */
 148         static hf_register_info hf[] = {
 149         };
 150 #endif
 151
 152 /* Setup protocol subtree array */
 153         static gint *ett[] = {
 154                 &ett_aim_chat,
 155         };
 156
 157 /* Register the protocol name and description */
 158         proto_aim_chat = proto_register_protocol("AIM Chat Service", "AIM Chat", "aim_chat");
 159
 160 /* Required function calls to register the header fields and subtrees used */
 161 /*FIXME
 162   proto_register_field_array(proto_aim_chat, hf, array_length(hf));*/
 163         proto_register_subtree_array(ett, array_length(ett));
 164 }
 165
 166 void
 167 proto_reg_handoff_aim_chat(void)
 168 {
 169         aim_init_family(proto_aim_chat, ett_aim_chat, FAMILY_CHAT, aim_fnac_family_chat);
 170 }