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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2008 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 <errno.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>
#include <glib.h>
#include "glib-helper.h"
struct search_context {
bdaddr_t src;
bdaddr_t dst;
sdp_session_t *session;
bt_callback_t cb;
bt_destroy_t destroy;
gpointer user_data;
};
static void search_context_cleanup(struct search_context *ctxt)
{
if (ctxt->destroy)
ctxt->destroy(ctxt->user_data);
sdp_close(ctxt->session);
g_free(ctxt);
}
static void search_completed_cb(uint8_t type, uint16_t status,
uint8_t *rsp, size_t size, void *user_data)
{
struct search_context *ctxt = user_data;
sdp_list_t *recs = NULL;
int scanned, seqlen = 0;
uint8_t dataType;
int err = 0;
if (status || type != SDP_SVC_SEARCH_ATTR_RSP) {
err = -EPROTO;
goto done;
}
scanned = sdp_extract_seqtype(rsp, &dataType, &seqlen);
if (!scanned || !seqlen)
goto done;
rsp += scanned;
do {
sdp_record_t *rec;
int recsize;
recsize = 0;
rec = sdp_extract_pdu(rsp, &recsize);
if (!rec)
break;
if (!recsize) {
sdp_record_free(rec);
break;
}
scanned += recsize;
rsp += recsize;
recs = sdp_list_append(recs, rec);
} while (scanned < size);
done:
ctxt->cb(ctxt->user_data, recs, err);
search_context_cleanup(ctxt);
}
static gboolean search_process_cb(GIOChannel *chan,
GIOCondition cond, void *user_data)
{
struct search_context *ctxt = user_data;
int err = 0;
if (cond & (G_IO_ERR | G_IO_HUP | G_IO_NVAL)) {
err = EIO;
goto failed;
}
if (sdp_process(ctxt->session) < 0)
goto failed;
return TRUE;
failed:
if (err) {
ctxt->cb(ctxt->user_data, NULL, -err);
search_context_cleanup(ctxt);
}
return FALSE;
}
static gboolean connect_watch(GIOChannel *chan, GIOCondition cond, gpointer user_data)
{
struct search_context *ctxt = user_data;
sdp_list_t *search, *attrids;
uint32_t range = 0x0000ffff;
uuid_t uuid;
socklen_t len;
int sk, err = 0;
sk = g_io_channel_unix_get_fd(chan);
len = sizeof(err);
if (getsockopt(sk, SOL_SOCKET, SO_ERROR, &err, &len) < 0) {
err = errno;
goto failed;
}
if (err != 0)
goto failed;
if (sdp_set_notify(ctxt->session, search_completed_cb, ctxt) < 0) {
err = EIO;
goto failed;
}
sdp_uuid16_create(&uuid, PUBLIC_BROWSE_GROUP);
search = sdp_list_append(NULL, &uuid);
attrids = sdp_list_append(NULL, &range);
if (sdp_service_search_attr_async(ctxt->session,
search, SDP_ATTR_REQ_RANGE, attrids) < 0) {
sdp_list_free(attrids, NULL);
sdp_list_free(search, NULL);
err = EIO;
goto failed;
}
sdp_list_free(attrids, NULL);
sdp_list_free(search, NULL);
/* Set callback responsible for update the internal SDP transaction */
g_io_add_watch(chan, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
search_process_cb, ctxt);
return FALSE;
failed:
ctxt->cb(ctxt->user_data, NULL, -err);
search_context_cleanup(ctxt);
return FALSE;
}
int bt_discover_services(const bdaddr_t *src, const bdaddr_t *dst,
bt_callback_t cb, void *user_data, bt_destroy_t destroy)
{
struct search_context *ctxt;
sdp_session_t *s;
GIOChannel *chan;
if (!cb)
return -EINVAL;
s = sdp_connect(src, dst, SDP_NON_BLOCKING);
if (!s)
return -errno;
ctxt = g_try_malloc0(sizeof(struct search_context));
if (!ctxt) {
sdp_close(s);
return -ENOMEM;
}
bacpy(&ctxt->src, src);
bacpy(&ctxt->dst, dst);
ctxt->session = s;
ctxt->cb = cb;
ctxt->destroy = destroy;
ctxt->user_data = user_data;
chan = g_io_channel_unix_new(sdp_get_socket(s));
g_io_add_watch(chan, G_IO_OUT | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
connect_watch, ctxt);
g_io_channel_unref(chan);
return 0;
}
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