attrib/gatt.c

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2010  Nokia Corporation
 *  Copyright (C) 2010  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
 *
 */

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

#include "att.h"
#include "gattrib.h"
#include "gatt.h"

guint gatt_discover_primary(GAttrib *attrib, uint16_t start, uint16_t end,
		uuid_t *uuid, GAttribResultFunc func, gpointer user_data)
{
	uint8_t pdu[ATT_DEFAULT_MTU];
	uuid_t prim;
	guint16 plen;
	uint8_t op;

	sdp_uuid16_create(&prim, GATT_PRIM_SVC_UUID);

	if (uuid == NULL) {

		/* Discover all primary services */
		op = ATT_OP_READ_BY_GROUP_REQ;
		plen = enc_read_by_grp_req(start, end, &prim, pdu, sizeof(pdu));
	} else {
		const void *value;
		int vlen;

		/* Discover primary service by service UUID */
		op = ATT_OP_FIND_BY_TYPE_REQ;

		if (uuid->type == SDP_UUID16) {
			value = &uuid->value.uuid16;
			vlen = sizeof(uuid->value.uuid16);
		} else {
			value = &uuid->value.uuid128;
			vlen = sizeof(uuid->value.uuid128);
		}

		plen = enc_find_by_type_req(start, end, &prim, value, vlen,
							pdu, sizeof(pdu));
	}

	if (plen == 0)
		return 0;

	return g_attrib_send(attrib, op, pdu, plen, func, user_data, NULL);
}

guint gatt_discover_char(GAttrib *attrib, uint16_t start, uint16_t end,
				GAttribResultFunc func, gpointer user_data)
{
	uuid_t uuid;

	sdp_uuid16_create(&uuid, GATT_CHARAC_UUID);

	return gatt_read_char_by_uuid(attrib, start, end, &uuid, func,
							user_data);
}

guint gatt_read_char_by_uuid(GAttrib *attrib, uint16_t start, uint16_t end,
					uuid_t *uuid, GAttribResultFunc func,
					gpointer user_data)
{
	uint8_t pdu[ATT_DEFAULT_MTU];
	guint16 plen;

	plen = enc_read_by_type_req(start, end, uuid, pdu, sizeof(pdu));
	if (plen == 0)
		return 0;

	return g_attrib_send(attrib, ATT_OP_READ_BY_TYPE_REQ,
					pdu, plen, func, user_data, NULL);
}

guint gatt_read_char(GAttrib *attrib, uint16_t handle, GAttribResultFunc func,
							gpointer user_data)
{
	uint8_t pdu[ATT_DEFAULT_MTU];
	guint16 plen;

	plen = enc_read_req(handle, pdu, sizeof(pdu));
	return g_attrib_send(attrib, ATT_OP_READ_REQ, pdu, plen, func,
							user_data, NULL);
}

guint gatt_write_char(GAttrib *attrib, uint16_t handle, uint8_t *value,
			int vlen, GAttribResultFunc func, gpointer user_data)
{
	uint8_t pdu[ATT_DEFAULT_MTU];
	guint16 plen;

	plen = enc_write_req(handle, value, vlen, pdu, sizeof(pdu));
	return g_attrib_send(attrib, ATT_OP_WRITE_REQ, pdu, plen, func,
							user_data, NULL);
}

guint gatt_find_info(GAttrib *attrib, uint16_t start, uint16_t end,
				GAttribResultFunc func, gpointer user_data)
{
	uint8_t pdu[ATT_DEFAULT_MTU];
	guint16 plen;

	plen = enc_find_info_req(start, end, pdu, sizeof(pdu));
	if (plen == 0)
		return 0;

	return g_attrib_send(attrib, ATT_OP_FIND_INFO_REQ, pdu, plen, func,
							user_data, NULL);
}

guint gatt_write_cmd(GAttrib *attrib, uint16_t handle, uint8_t *value, int vlen,
				GDestroyNotify notify, gpointer user_data)
{
	uint8_t pdu[ATT_DEFAULT_MTU];
	guint16 plen;

	plen = enc_write_cmd(handle, value, vlen, pdu, sizeof(pdu));
	return g_attrib_send(attrib, ATT_OP_WRITE_CMD, pdu, plen, NULL,
							user_data, notify);
}