/*
  dund - Bluetooth LAN/DUN daemon for BlueZ
  Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
	
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License, version 2, as
  published by the Free Software Foundation.

  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
*/

/*
 * $Id$
 */

#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <syslog.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>

#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>

#include "dund.h"

static sdp_record_t  *record;
static sdp_session_t *session;

void dun_sdp_unregister(void) 
{
	if (record && sdp_record_unregister(session, record))
		syslog(LOG_ERR, "Service record unregistration failed.");
	sdp_close(session);
}

int dun_sdp_register(uint8_t channel)
{
	sdp_list_t *svclass, *pfseq, *apseq, *root, *aproto;
	uuid_t root_uuid, l2cap, rfcomm, dun;
	sdp_profile_desc_t profile[1];
	sdp_list_t *proto[2];
	int status;

	session = sdp_connect(BDADDR_ANY, BDADDR_LOCAL, 0);
	if (!session) {
		syslog(LOG_ERR, "Failed to connect to the local SDP server. %s(%d)", 
				strerror(errno), errno);
		return -1;
	}

	record = sdp_record_alloc();
	if (!record) {
		syslog(LOG_ERR, "Failed to alloc service record");
		return -1;
	}

	sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
	root = sdp_list_append(NULL, &root_uuid);
	sdp_set_browse_groups(record, root);

	sdp_uuid16_create(&l2cap, L2CAP_UUID);
	proto[0] = sdp_list_append(NULL, &l2cap);
	apseq    = sdp_list_append(NULL, proto[0]);

	sdp_uuid16_create(&rfcomm, RFCOMM_UUID);
	proto[1] = sdp_list_append(NULL, &rfcomm);
	proto[1] = sdp_list_append(proto[1], sdp_data_alloc(SDP_UINT8, &channel));
	apseq    = sdp_list_append(apseq, proto[1]);

	aproto   = sdp_list_append(NULL, apseq);
	sdp_set_access_protos(record, aproto);

	sdp_uuid16_create(&dun, LAN_ACCESS_SVCLASS_ID);
	svclass = sdp_list_append(NULL, &dun);
	sdp_set_service_classes(record, svclass);

	sdp_uuid16_create(&profile[0].uuid, LAN_ACCESS_PROFILE_ID);
	profile[0].version = 0x0100;
	pfseq = sdp_list_append(NULL, &profile[0]);
	sdp_set_profile_descs(record, pfseq);
		
	sdp_set_info_attr(record, "LAN Access Point", NULL, NULL);

	status = sdp_record_register(session, record, 0);
	if (status) {
		syslog(LOG_ERR, "SDP registration failed.");
		sdp_record_free(record); record = NULL;
		return -1;
	}
	return 0;
}

int dun_sdp_search(bdaddr_t *src, bdaddr_t *dst, int *channel)
{
	sdp_session_t *s;
	sdp_list_t *srch, *attrs, *rsp;
	uuid_t svclass;
	uint16_t attr;
	int err;

	s = sdp_connect(src, dst, 0);
	if (!s) {
		syslog(LOG_ERR, "Failed to connect to the SDP server. %s(%d)", 
				strerror(errno), errno);
		return -1;
	}

	sdp_uuid16_create(&svclass, LAN_ACCESS_SVCLASS_ID);
	srch  = sdp_list_append(NULL, &svclass);

	attr  = SDP_ATTR_PROTO_DESC_LIST;
	attrs = sdp_list_append(NULL, &attr);

	err = sdp_service_search_attr_req(s, srch, SDP_ATTR_REQ_INDIVIDUAL, attrs, &rsp);

	sdp_close(s);
	
	if (err)
		return 0;

	for(; rsp; rsp = rsp->next) {
		sdp_record_t *rec = (sdp_record_t *) rsp->data;
		sdp_list_t *protos;

		if (!sdp_get_access_protos(rec, &protos)) {
			int ch = sdp_get_proto_port(protos, RFCOMM_UUID);
			if (ch > 0) {
				*channel = ch;
				return 1;
			}
		}
	}

	return 0;
}