Move hidd pand and dund into compat directory

1 files changed, 718 insertions, 0 deletions

diff --git a/compat/sdp.c b/compat/sdp.c
new file mode 100644
index 00000000..a08ace90
--- /dev/null
+++ b/compat/sdp.c
@@ -0,0 +1,718 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2003-2008  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/l2cap.h>
+#include <bluetooth/sdp.h>
+#include <bluetooth/sdp_lib.h>
+#include <bluetooth/hidp.h>
+#include <bluetooth/bnep.h>
+
+#include "textfile.h"
+#include "sdp.h"
+
+static sdp_record_t *record = NULL;
+static sdp_session_t *session = NULL;
+
+static void add_lang_attr(sdp_record_t *r)
+{
+	sdp_lang_attr_t base_lang;
+	sdp_list_t *langs = 0;
+
+	/* UTF-8 MIBenum (http://www.iana.org/assignments/character-sets) */
+	base_lang.code_ISO639 = (0x65 << 8) | 0x6e;
+	base_lang.encoding = 106;
+	base_lang.base_offset = SDP_PRIMARY_LANG_BASE;
+	langs = sdp_list_append(0, &base_lang);
+	sdp_set_lang_attr(r, langs);
+	sdp_list_free(langs, 0);
+}
+
+static void epox_endian_quirk(unsigned char *data, int size)
+{
+	/* USAGE_PAGE (Keyboard)	05 07
+	 * USAGE_MINIMUM (0)		19 00
+	 * USAGE_MAXIMUM (65280)	2A 00 FF   <= must be FF 00
+	 * LOGICAL_MINIMUM (0)		15 00
+	 * LOGICAL_MAXIMUM (65280)	26 00 FF   <= must be FF 00
+	 */
+	unsigned char pattern[] = { 0x05, 0x07, 0x19, 0x00, 0x2a, 0x00, 0xff,
+						0x15, 0x00, 0x26, 0x00, 0xff };
+	int i;
+
+	if (!data)
+		return;
+
+	for (i = 0; i < size - sizeof(pattern); i++) {
+		if (!memcmp(data + i, pattern, sizeof(pattern))) {
+			data[i + 5] = 0xff;
+			data[i + 6] = 0x00;
+			data[i + 10] = 0xff;
+			data[i + 11] = 0x00;
+		}
+	}
+}
+
+static int store_device_info(const bdaddr_t *src, const bdaddr_t *dst, struct hidp_connadd_req *req)
+{
+	char filename[PATH_MAX + 1], addr[18], *str, *desc;
+	int i, err, size;
+
+	ba2str(src, addr);
+	create_name(filename, PATH_MAX, STORAGEDIR, addr, "hidd");
+
+	size = 15 + 3 + 3 + 5 + (req->rd_size * 2) + 1 + 9 + strlen(req->name) + 2;
+	str = malloc(size);
+	if (!str)
+		return -ENOMEM;
+
+	desc = malloc((req->rd_size * 2) + 1);
+	if (!desc) {
+		free(str);
+		return -ENOMEM;
+	}
+
+	memset(desc, 0, (req->rd_size * 2) + 1);
+	for (i = 0; i < req->rd_size; i++)
+		sprintf(desc + (i * 2), "%2.2X", req->rd_data[i]);
+
+	snprintf(str, size - 1, "%04X:%04X:%04X %02X %02X %04X %s %08X %s",
+			req->vendor, req->product, req->version,
+			req->subclass, req->country, req->parser, desc,
+			req->flags, req->name);
+
+	free(desc);
+
+	create_file(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+
+	ba2str(dst, addr);
+	err = textfile_put(filename, addr, str);
+
+	free(str);
+
+	return err;
+}
+
+int get_stored_device_info(const bdaddr_t *src, const bdaddr_t *dst, struct hidp_connadd_req *req)
+{
+	char filename[PATH_MAX + 1], addr[18], tmp[3], *str, *desc;
+	unsigned int vendor, product, version, subclass, country, parser, pos;
+	int i;
+
+	desc = malloc(4096);
+	if (!desc)
+		return -ENOMEM;
+
+	memset(desc, 0, 4096);
+
+	ba2str(src, addr);
+	create_name(filename, PATH_MAX, STORAGEDIR, addr, "hidd");
+
+	ba2str(dst, addr);
+	str = textfile_get(filename, addr);
+	if (!str) {
+		free(desc);
+		return -EIO;
+	}
+
+	sscanf(str, "%04X:%04X:%04X %02X %02X %04X %4095s %08X %n",
+			&vendor, &product, &version, &subclass, &country,
+			&parser, desc, &req->flags, &pos);
+
+	free(str);
+
+	req->vendor   = vendor;
+	req->product  = product;
+	req->version  = version;
+	req->subclass = subclass;
+	req->country  = country;
+	req->parser   = parser;
+
+	snprintf(req->name, 128, str + pos);
+
+	req->rd_size = strlen(desc) / 2;
+	req->rd_data = malloc(req->rd_size);
+	if (!req->rd_data) {
+		free(desc);
+		return -ENOMEM;
+	}
+
+	memset(tmp, 0, sizeof(tmp));
+	for (i = 0; i < req->rd_size; i++) {
+		memcpy(tmp, desc + (i * 2), 2);
+		req->rd_data[i] = (uint8_t) strtol(tmp, NULL, 16);
+	}
+
+	free(desc);
+
+	return 0;
+}
+
+int get_sdp_device_info(const bdaddr_t *src, const bdaddr_t *dst, struct hidp_connadd_req *req)
+{
+	struct sockaddr_l2 addr;
+	socklen_t addrlen;
+	bdaddr_t bdaddr;
+	uint32_t range = 0x0000ffff;
+	sdp_session_t *s;
+	sdp_list_t *search, *attrid, *pnp_rsp, *hid_rsp;
+	sdp_record_t *rec;
+	sdp_data_t *pdlist, *pdlist2;
+	uuid_t svclass;
+	int err;
+
+	s = sdp_connect(src, dst, SDP_RETRY_IF_BUSY | SDP_WAIT_ON_CLOSE);
+	if (!s)
+		return -1;
+
+	sdp_uuid16_create(&svclass, PNP_INFO_SVCLASS_ID);
+	search = sdp_list_append(NULL, &svclass);
+	attrid = sdp_list_append(NULL, &range);
+
+	err = sdp_service_search_attr_req(s, search,
+					SDP_ATTR_REQ_RANGE, attrid, &pnp_rsp);
+
+	sdp_list_free(search, NULL);
+	sdp_list_free(attrid, NULL);
+
+	sdp_uuid16_create(&svclass, HID_SVCLASS_ID);
+	search = sdp_list_append(NULL, &svclass);
+	attrid = sdp_list_append(NULL, &range);
+
+	err = sdp_service_search_attr_req(s, search,
+					SDP_ATTR_REQ_RANGE, attrid, &hid_rsp);
+
+	sdp_list_free(search, NULL);
+	sdp_list_free(attrid, NULL);
+
+	memset(&addr, 0, sizeof(addr));
+	addrlen = sizeof(addr);
+
+	if (getsockname(s->sock, (struct sockaddr *) &addr, &addrlen) < 0)
+		bacpy(&bdaddr, src);
+	else
+		bacpy(&bdaddr, &addr.l2_bdaddr);
+
+	sdp_close(s);
+
+	if (err || !hid_rsp)
+		return -1;
+
+	if (pnp_rsp) {
+		rec = (sdp_record_t *) pnp_rsp->data;
+
+		pdlist = sdp_data_get(rec, 0x0201);
+		req->vendor = pdlist ? pdlist->val.uint16 : 0x0000;
+
+		pdlist = sdp_data_get(rec, 0x0202);
+		req->product = pdlist ? pdlist->val.uint16 : 0x0000;
+
+		pdlist = sdp_data_get(rec, 0x0203);
+		req->version = pdlist ? pdlist->val.uint16 : 0x0000;
+
+		sdp_record_free(rec);
+	}
+
+	rec = (sdp_record_t *) hid_rsp->data;
+
+	pdlist = sdp_data_get(rec, 0x0101);
+	pdlist2 = sdp_data_get(rec, 0x0102);
+	if (pdlist) {
+		if (pdlist2) {
+			if (strncmp(pdlist->val.str, pdlist2->val.str, 5)) {
+				strncpy(req->name, pdlist2->val.str, sizeof(req->name) - 1);
+				strcat(req->name, " ");
+			}
+			strncat(req->name, pdlist->val.str,
+					sizeof(req->name) - strlen(req->name));
+		} else
+			strncpy(req->name, pdlist->val.str, sizeof(req->name));
+	} else {
+		pdlist2 = sdp_data_get(rec, 0x0100);
+		if (pdlist2)
+			strncpy(req->name, pdlist2->val.str, sizeof(req->name));
+	}
+
+	pdlist = sdp_data_get(rec, 0x0201);
+	req->parser = pdlist ? pdlist->val.uint16 : 0x0100;
+
+	pdlist = sdp_data_get(rec, 0x0202);
+	req->subclass = pdlist ? pdlist->val.uint8 : 0;
+
+	pdlist = sdp_data_get(rec, 0x0203);
+	req->country = pdlist ? pdlist->val.uint8 : 0;
+
+	pdlist = sdp_data_get(rec, 0x0206);
+	if (pdlist) {
+		pdlist = pdlist->val.dataseq;
+		pdlist = pdlist->val.dataseq;
+		pdlist = pdlist->next;
+
+		req->rd_data = malloc(pdlist->unitSize);
+		if (req->rd_data) {
+			memcpy(req->rd_data, (unsigned char *) pdlist->val.str, pdlist->unitSize);
+			req->rd_size = pdlist->unitSize;
+			epox_endian_quirk(req->rd_data, req->rd_size);
+		}
+	}
+
+	sdp_record_free(rec);
+
+	if (bacmp(&bdaddr, BDADDR_ANY))
+		store_device_info(&bdaddr, dst, req);
+
+	return 0;
+}
+
+int get_alternate_device_info(const bdaddr_t *src, const bdaddr_t *dst, uint16_t *uuid, uint8_t *channel, char *name, size_t len)
+{
+	uint16_t attr1 = SDP_ATTR_PROTO_DESC_LIST;
+	uint16_t attr2 = SDP_ATTR_SVCNAME_PRIMARY;
+	sdp_session_t *s;
+	sdp_list_t *search, *attrid, *rsp;
+	uuid_t svclass;
+	int err;
+
+	s = sdp_connect(src, dst, SDP_RETRY_IF_BUSY | SDP_WAIT_ON_CLOSE);
+	if (!s)
+		return -1;
+
+	sdp_uuid16_create(&svclass, HEADSET_SVCLASS_ID);
+	search = sdp_list_append(NULL, &svclass);
+	attrid = sdp_list_append(NULL, &attr1);
+	attrid = sdp_list_append(attrid, &attr2);
+
+	err = sdp_service_search_attr_req(s, search,
+					SDP_ATTR_REQ_INDIVIDUAL, attrid, &rsp);
+
+	sdp_list_free(search, NULL);
+	sdp_list_free(attrid, NULL);
+
+	if (err <= 0) {
+		sdp_uuid16_create(&svclass, SERIAL_PORT_SVCLASS_ID);
+		search = sdp_list_append(NULL, &svclass);
+		attrid = sdp_list_append(NULL, &attr1);
+		attrid = sdp_list_append(attrid, &attr2);
+
+		err = sdp_service_search_attr_req(s, search,
+					SDP_ATTR_REQ_INDIVIDUAL, attrid, &rsp);
+
+		sdp_list_free(search, NULL);
+		sdp_list_free(attrid, NULL);
+
+		if (err < 0) {
+			sdp_close(s);
+			return err;
+		}
+
+		if (uuid)
+			*uuid = SERIAL_PORT_SVCLASS_ID;
+	} else {
+		if (uuid)
+			*uuid = HEADSET_SVCLASS_ID;
+	}
+
+	sdp_close(s);
+
+	for (; rsp; rsp = rsp->next) {
+		sdp_record_t *rec = (sdp_record_t *) rsp->data;
+		sdp_list_t *protos;
+
+		sdp_get_service_name(rec, name, len);
+
+		if (!sdp_get_access_protos(rec, &protos)) {
+			uint8_t ch = sdp_get_proto_port(protos, RFCOMM_UUID);
+			if (ch > 0) {
+				if (channel)
+					*channel = ch;
+				return 0;
+			}
+		}
+
+		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;
+}