bluez/pand/sdp.c

/*
  pand - Bluetooth PAN 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 <bluetooth/bnep.h>

#include "pand.h"

static sdp_record_t  *record;
static sdp_session_t *session;

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

	sdp_close(session);
}

int bnep_sdp_register(uint16_t role)
{
	sdp_list_t *svclass, *pfseq, *apseq, *root, *aproto;
	uuid_t root_uuid, pan, l2cap, bnep;
	sdp_profile_desc_t profile[1];
	sdp_list_t *proto[2];
	uint16_t psm = 15, version = 0x0100;
	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 allocate service record %s(%d)", 
				strerror(errno), errno);
		sdp_close(session);
		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);
	proto[0] = sdp_list_append(proto[0], sdp_data_alloc(SDP_UINT16, &psm));
	apseq    = sdp_list_append(NULL, proto[0]);

	sdp_uuid16_create(&bnep, BNEP_UUID);
	proto[1] = sdp_list_append(NULL, &bnep);
	proto[1] = sdp_list_append(proto[1], sdp_data_alloc(SDP_UINT16, &version));

	/* Supported protocols */
	{
		uint16_t ptype[4] = { 
			0x0800,  /* IPv4 */
			0x0806,  /* ARP */
		};
		sdp_data_t *head, *pseq;
		int p;

		for (p = 0, head = NULL; p < 2; p++) {
			sdp_data_t *data = sdp_data_alloc(SDP_UINT16, &ptype[p]);
			if (head)
				sdp_seq_append(head, data);
			else
				head = data;
		}
		pseq = sdp_data_alloc(SDP_SEQ16, head);
		proto[1] = sdp_list_append(proto[1], pseq);
	}

	apseq    = sdp_list_append(apseq, proto[1]);
	
	aproto   = sdp_list_append(NULL, apseq);
	sdp_set_access_protos(record, aproto);

	switch (role) {
	case BNEP_SVC_NAP:
		sdp_uuid16_create(&pan, NAP_SVCLASS_ID);
		svclass = sdp_list_append(NULL, &pan);
		sdp_set_service_classes(record, svclass);

		sdp_uuid16_create(&profile[0].uuid, NAP_PROFILE_ID);
		profile[0].version = 0x0100;
		pfseq = sdp_list_append(NULL, &profile[0]);
		sdp_set_profile_descs(record, pfseq);

		sdp_set_info_attr(record, "Network Access Point", NULL, NULL);
		break;

	case BNEP_SVC_GN:
		sdp_uuid16_create(&pan, GN_SVCLASS_ID);
		svclass = sdp_list_append(NULL, &pan);
		sdp_set_service_classes(record, svclass);

		sdp_uuid16_create(&profile[0].uuid, GN_PROFILE_ID);
		profile[0].version = 0x0100;
		pfseq = sdp_list_append(NULL, &profile[0]);
		sdp_set_profile_descs(record, pfseq);
		
		sdp_set_info_attr(record, "Group Network Service", NULL, NULL);
		break;

	case BNEP_SVC_PANU:
		sdp_uuid16_create(&pan, PANU_SVCLASS_ID);
		svclass = sdp_list_append(NULL, &pan);
		sdp_set_service_classes(record, svclass);

		sdp_uuid16_create(&profile[0].uuid, PANU_PROFILE_ID);
		profile[0].version = 0x0100;
		pfseq = sdp_list_append(NULL, &profile[0]);
		sdp_set_profile_descs(record, pfseq);

		sdp_set_info_attr(record, "PAN User", NULL, NULL);
		break;
	}

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

// Search for PAN service.
// Returns 1 if service is found and 0 otherwise.
int bnep_sdp_search(bdaddr_t *src, bdaddr_t *dst, uint16_t service)
{
	sdp_list_t *srch, *rsp = NULL;
	sdp_session_t *s;
	uuid_t svclass;
	int err;

	switch (service) {
	case BNEP_SVC_PANU:
		sdp_uuid16_create(&svclass, PANU_SVCLASS_ID);
		break;
	case BNEP_SVC_NAP:
		sdp_uuid16_create(&svclass, NAP_SVCLASS_ID);
		break;
	case BNEP_SVC_GN:
		sdp_uuid16_create(&svclass, GN_SVCLASS_ID);
		break;
	}
		
	srch = sdp_list_append(NULL, &svclass);

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

	err = sdp_service_search_req(s, srch, 1, &rsp);
	sdp_close(s);

	/* Assume that search is successeful
	 * if at least one record is found */
	if (!err && sdp_list_len(rsp))
		return 1;

	return 0;
}