sdp.c

这是Linux环境下的蓝牙源代码

			}
		}

		sdp_record_free(rec);
	}

	return -EIO;
}

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(bdaddr_t *device, 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];
	sdp_data_t *v, *p;
	uint16_t psm = 15, version = 0x0100;
	uint16_t security_desc = 0;
	uint16_t net_access_type = 0xfffe;
	uint32_t max_net_access_rate = 0;
	char *name = "BlueZ PAN";
	char *desc = "BlueZ PAN Service";
	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_list_free(root, 0);

	sdp_uuid16_create(&l2cap, L2CAP_UUID);
	proto[0] = sdp_list_append(NULL, &l2cap);
	p = sdp_data_alloc(SDP_UINT16, &psm);
	proto[0] = sdp_list_append(proto[0], p);
	apseq    = sdp_list_append(NULL, proto[0]);

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

	/* 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);

	add_lang_attr(record);

	sdp_list_free(proto[0], NULL);
	sdp_list_free(proto[1], NULL);
	sdp_list_free(apseq, NULL);
	sdp_list_free(aproto, NULL);
	sdp_data_free(p);
	sdp_data_free(v);
	sdp_attr_add_new(record, SDP_ATTR_SECURITY_DESC, SDP_UINT16, &security_desc);

	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", name, desc);

		sdp_attr_add_new(record, SDP_ATTR_NET_ACCESS_TYPE, SDP_UINT16, &net_access_type);
		sdp_attr_add_new(record, SDP_ATTR_MAX_NET_ACCESSRATE, SDP_UINT32, &max_net_access_rate);
		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", name, desc);
		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_list_free(svclass, 0);

		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_list_free(pfseq, 0);

		sdp_set_info_attr(record, "PAN User", name, desc);
		break;
	}

	status = sdp_device_record_register(session, device, 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;
}

static unsigned char async_uuid[] = {	0x03, 0x50, 0x27, 0x8F, 0x3D, 0xCA, 0x4E, 0x62,
					0x83, 0x1D, 0xA4, 0x11, 0x65, 0xFF, 0x90, 0x6C };

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(bdaddr_t *device, uint8_t channel, int type)
{
	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);

	switch (type) {
	case MROUTER:
		sdp_uuid16_create(&dun, SERIAL_PORT_SVCLASS_ID);
		break;
	case ACTIVESYNC:
		sdp_uuid128_create(&dun, (void *) async_uuid);
		break;
	case DIALUP:
		sdp_uuid16_create(&dun, DIALUP_NET_SVCLASS_ID);
		break;
	default:
		sdp_uuid16_create(&dun, LAN_ACCESS_SVCLASS_ID);
		break;
	}

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

	switch (type) {
	case LANACCESS:
		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);
		break;
	case DIALUP:
		sdp_uuid16_create(&profile[0].uuid, DIALUP_NET_PROFILE_ID);
		profile[0].version = 0x0100;
		pfseq = sdp_list_append(NULL, &profile[0]);
		sdp_set_profile_descs(record, pfseq);
		break;
	}

	switch (type) {
	case MROUTER:
		sdp_set_info_attr(record, "mRouter", NULL, NULL);
		break;
	case ACTIVESYNC:
		sdp_set_info_attr(record, "ActiveSync", NULL, NULL);
		break;
	case DIALUP:
		sdp_set_info_attr(record, "Dialup Networking", NULL, NULL);
		break;
	default:
		sdp_set_info_attr(record, "LAN Access Point", NULL, NULL);
		break;
	}

	status = sdp_device_record_register(session, device, 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, int type)
{
	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;
	}

	switch (type) {
	case MROUTER:
		sdp_uuid16_create(&svclass, SERIAL_PORT_SVCLASS_ID);
		break;
	case ACTIVESYNC:
		sdp_uuid128_create(&svclass, (void *) async_uuid);
		break;
	case DIALUP:
		sdp_uuid16_create(&svclass, DIALUP_NET_SVCLASS_ID);
		break;
	default:
		sdp_uuid16_create(&svclass, LAN_ACCESS_SVCLASS_ID);
		break;
	}

	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;
}