/* packet-hci_h4.c
 * Routines for the Bluetooth HCI H4 dissection
 *
 * Copyright 2002, Christoph Scholz <scholz@cs.uni-bonn.de>
 *  From: http://affix.sourceforge.net/archive/ethereal_affix-3.patch
 *
 * Refactored for wireshark checkin
 *   Ronnie Sahlberg 2006
 *
 * $Id$
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <epan/packet.h>

#include "packet-hci_h4.h"


static int proto_hci_h4 = -1;
static int hf_hci_h4_type = -1;
static int hf_hci_h4_direction = -1;

static gint ett_hci_h4 = -1;

static dissector_table_t hci_h4_table;
static dissector_handle_t data_handle;


static const value_string hci_h4_type_vals[] = {
	{HCI_H4_TYPE_CMD, "HCI Command"},
	{HCI_H4_TYPE_ACL, "ACL Data"},
	{HCI_H4_TYPE_SCO, "SCO Data"},
	{HCI_H4_TYPE_EVT, "HCI Event"},
	{0, NULL }
};
static const value_string hci_h4_direction_vals[] = {
	{P2P_DIR_SENT,		"Sent"},
	{P2P_DIR_RECV,		"Rcvd"},
	{P2P_DIR_UNKNOWN,	"Unspecified"},
	{0, NULL}
};

static void
dissect_hci_h4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	guint8 type;
	tvbuff_t *next_tvb;
	proto_item *ti=NULL;
	proto_tree *hci_h4_tree=NULL;

	col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI H4");
	switch (pinfo->p2p_dir) {

	case P2P_DIR_SENT:
		col_add_fstr(pinfo->cinfo, COL_INFO, "Sent ");
		break;

	case P2P_DIR_RECV:
		col_add_fstr(pinfo->cinfo, COL_INFO, "Rcvd ");
		break;

	case P2P_DIR_UNKNOWN:
		break;

	default:
		col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
		    pinfo->p2p_dir);
		break;
	}

	type = tvb_get_guint8(tvb, 0);

	if(tree){
		ti = proto_tree_add_item(tree, proto_hci_h4, tvb, 0, 1, ENC_NA);
		hci_h4_tree = proto_item_add_subtree(ti, ett_hci_h4);
	}

	ti=proto_tree_add_uint(hci_h4_tree, hf_hci_h4_direction, tvb, 0, 0, pinfo->p2p_dir);
	PROTO_ITEM_SET_GENERATED(ti);

	proto_tree_add_item(hci_h4_tree, hf_hci_h4_type,
		tvb, 0, 1, ENC_LITTLE_ENDIAN);
	col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
			val_to_str(type, hci_h4_type_vals, "Unknown HCI packet type 0x%02x"));

	next_tvb = tvb_new_subset_remaining(tvb, 1);
	if(!dissector_try_uint(hci_h4_table, type, next_tvb, pinfo, tree)) {
		call_dissector(data_handle, next_tvb, pinfo, tree);
	}
}


void
proto_register_hci_h4(void)
{
	static hf_register_info hf[] = {
	{ &hf_hci_h4_type,
		{ "HCI Packet Type",           "hci_h4.type",
		FT_UINT8, BASE_HEX, VALS(hci_h4_type_vals), 0x0,
		NULL, HFILL }},

	{ &hf_hci_h4_direction,
		{ "Direction",           "hci_h4.direction",
		FT_UINT8, BASE_HEX, VALS(hci_h4_direction_vals), 0x0,
		"HCI Packet Direction Sent/Rcvd", HFILL }},

	};

	static gint *ett[] = {
		&ett_hci_h4,
	};

	proto_hci_h4 = proto_register_protocol("Bluetooth HCI H4",
	    "HCI_H4", "hci_h4");

	register_dissector("hci_h4", dissect_hci_h4, proto_hci_h4);

	proto_register_field_array(proto_hci_h4, hf, array_length(hf));
	proto_register_subtree_array(ett, array_length(ett));

	hci_h4_table = register_dissector_table("hci_h4.type",
		"HCI H4 pdu type", FT_UINT8, BASE_HEX);
}

void
proto_reg_handoff_hci_h4(void)
{
	dissector_handle_t hci_h4_handle;

	data_handle = find_dissector("data");
	hci_h4_handle = find_dissector("hci_h4");
	dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4, hci_h4_handle);
	dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR, hci_h4_handle);
}