/* packet-aim-chat.c
 * Routines for AIM Instant Messenger (OSCAR) dissection, SNAC Chat
 * Copyright 2004, Jelmer Vernooij <jelmer@samba.org>
 * Copyright 2000, Ralf Hoelzer <ralf@well.com>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <epan/packet.h>
#include "packet-aim.h"

void proto_register_aim_chat(void);
void proto_reg_handoff_aim_chat(void);

/* SNAC families */
#define FAMILY_CHAT       0x000E

#define AIM_CHAT_TLV_BROWSABLE_TREE 		0x001
#define AIM_CHAT_TLV_CLASS_EXCLUSIVE		0x002
#define AIM_CHAT_TLV_MAX_CONCURRENT_ROOMS	0x003
#define AIM_CHAT_TLV_MAX_ROOM_NAME_LEN		0x004
#define AIM_CHAT_TLV_ROOT_ROOMS			0x005
#define AIM_CHAT_TLV_SEARCH_TAGS		0x006
#define AIM_CHAT_TLV_CHILD_ROOMS		0x065
#define AIM_CHAT_TLV_CONTAINS_USER_CLASS	0x066
#define AIM_CHAT_TLV_CONTAINS_USER_ARRAY	0x067

#if 0
static const aim_tlv aim_chat_tlvs[] _U_ = {
	{ AIM_CHAT_TLV_BROWSABLE_TREE,	     "Browsable tree",			dissect_aim_tlv_value_bytes },
	{ AIM_CHAT_TLV_CLASS_EXCLUSIVE,	     "Exclusively for class",		dissect_aim_tlv_value_userclass },
	{ AIM_CHAT_TLV_MAX_CONCURRENT_ROOMS, "Max. number of concurrent rooms", dissect_aim_tlv_value_uint8 },
	{ AIM_CHAT_TLV_MAX_ROOM_NAME_LEN,    "Max. length of room name",	dissect_aim_tlv_value_uint8 },
	{ AIM_CHAT_TLV_ROOT_ROOMS,	     "Root Rooms",			dissect_aim_tlv_value_bytes },
	{ AIM_CHAT_TLV_SEARCH_TAGS,	     "Search Tags",			dissect_aim_tlv_value_bytes },
	{ AIM_CHAT_TLV_CHILD_ROOMS,	     "Child Rooms",			dissect_aim_tlv_value_bytes },
	{ AIM_CHAT_TLV_CONTAINS_USER_CLASS,  "Contains User Class",		dissect_aim_tlv_value_bytes },
	{ AIM_CHAT_TLV_CONTAINS_USER_ARRAY,  "Contains User Array",		dissect_aim_tlv_value_bytes },
	{ 0, NULL, NULL }
};
#endif

/* Initialize the protocol and registered fields */
static int proto_aim_chat = -1;

static int hf_aim_chat_screen_name = -1;

/* Initialize the subtree pointers */
static gint ett_aim_chat          = -1;

static int dissect_aim_chat_userinfo_list(tvbuff_t *tvb, packet_info *pinfo, proto_tree *chat_tree)
{
	int offset = 0;
	while(tvb_reported_length_remaining(tvb, offset) > 0) {
		offset = dissect_aim_userinfo(tvb, pinfo, offset, chat_tree);
	}
	return offset;
}

static int dissect_aim_chat_outgoing_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *chat_tree _U_)
{
	guint8 *buddyname;
	guchar *msg;
	int buddyname_length;

	msg=(guchar *)wmem_alloc(wmem_packet_scope(), 1000);
	buddyname_length = aim_get_buddyname( &buddyname, tvb, 30 );

	/* channel message from client */
	aim_get_message( msg, tvb, 40 + buddyname_length, tvb_reported_length(tvb)
					 - 40 - buddyname_length );

	col_append_fstr(pinfo->cinfo, COL_INFO, " -> %s", msg);

	return tvb_reported_length(tvb);
}


static int dissect_aim_chat_incoming_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *chat_tree)
{
	guint8 *buddyname;
	guchar *msg;
	/* channel message to client */
	int buddyname_length;

	msg=(guchar *)wmem_alloc(wmem_packet_scope(), 1000);
	buddyname_length = aim_get_buddyname( &buddyname, tvb, 30 );

	aim_get_message( msg, tvb, 36 + buddyname_length, tvb_reported_length(tvb)
					 - 36 - buddyname_length );

	col_append_fstr(pinfo->cinfo, COL_INFO, "from: %s", buddyname);
	col_append_fstr(pinfo->cinfo, COL_INFO, " -> %s", msg);

	proto_tree_add_string(chat_tree, hf_aim_chat_screen_name, tvb, 31, buddyname_length, buddyname);

	return tvb_reported_length(tvb);
}

static const aim_subtype aim_fnac_family_chat[] = {
	{ 0x0001, "Error",	      dissect_aim_snac_error },
	{ 0x0002, "Room Info Update", NULL },
	{ 0x0003, "User Join",	      dissect_aim_chat_userinfo_list },
	{ 0x0004, "User Leave",	      dissect_aim_chat_userinfo_list },
	{ 0x0005, "Outgoing Message", dissect_aim_chat_outgoing_msg },
	{ 0x0006, "Incoming Message", dissect_aim_chat_incoming_msg },
	{ 0x0007, "Evil Request",     NULL },
	{ 0x0008, "Evil Reply",       NULL },
	{ 0, NULL, NULL }
};

/* Register the protocol with Wireshark */
void
proto_register_aim_chat(void)
{

/* Setup list of header fields */
	static hf_register_info hf[] = {
		{ &hf_aim_chat_screen_name,
		  { "Screen Name", "aim_chat.screen_name", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL },
		},
	};

/* Setup protocol subtree array */
	static gint *ett[] = {
		&ett_aim_chat,
	};

/* Register the protocol name and description */
	proto_aim_chat = proto_register_protocol("AIM Chat Service", "AIM Chat", "aim_chat");

/* Required function calls to register the header fields and subtrees used */
	proto_register_field_array(proto_aim_chat, hf, array_length(hf));
	proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_aim_chat(void)
{
	aim_init_family(proto_aim_chat, ett_aim_chat, FAMILY_CHAT, aim_fnac_family_chat);
}

/*
 * 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:
 */