map-client.c

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2014  Intel Corporation. All rights reserved.
 *
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; 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 <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <glib.h>

#include "lib/sdp.h"
#include "lib/sdp_lib.h"
#include "src/sdp-client.h"

#include "ipc.h"
#include "lib/bluetooth.h"
#include "map-client.h"
#include "src/log.h"
#include "hal-msg.h"
#include "ipc-common.h"
#include "utils.h"
#include "src/shared/util.h"

static struct ipc *hal_ipc = NULL;
static bdaddr_t adapter_addr;

static int fill_mce_inst(void *buf, int32_t id, int32_t scn, int32_t msg_type,
					const void *name, uint8_t name_len)
{
	struct hal_map_client_mas_instance *inst = buf;

	inst->id = id;
	inst->scn = scn;
	inst->msg_types = msg_type;
	inst->name_len = name_len;

	if (name_len)
		memcpy(inst->name, name, name_len);

	return sizeof(*inst) + name_len;
}

static void map_client_sdp_search_cb(sdp_list_t *recs, int err, gpointer data)
{
	uint8_t buf[IPC_MTU];
	struct hal_ev_map_client_remote_mas_instances *ev = (void *) buf;
	bdaddr_t *dst = data;
	sdp_list_t *list, *protos;
	uint8_t status;
	int32_t id, scn, msg_type, name_len, num_instances = 0;
	char *name;
	size_t size;

	size = sizeof(*ev);
	bdaddr2android(dst, &ev->bdaddr);

	if (err < 0) {
		error("mce: Unable to get SDP record: %s", strerror(-err));
		status = HAL_STATUS_FAILED;
		goto fail;
	}

	for (list = recs; list != NULL; list = list->next) {
		sdp_record_t *rec = list->data;
		sdp_data_t *data;

		data = sdp_data_get(rec, SDP_ATTR_MAS_INSTANCE_ID);
		if (!data) {
			error("mce: cannot get mas instance id");
			continue;
		}

		id = data->val.uint8;

		data = sdp_data_get(rec, SDP_ATTR_SVCNAME_PRIMARY);
		if (!data) {
			error("mce: cannot get mas instance name");
			continue;
		}

		name = data->val.str;
		name_len = data->unitSize;

		data = sdp_data_get(rec, SDP_ATTR_SUPPORTED_MESSAGE_TYPES);
		if (!data) {
			error("mce: cannot get mas instance msg type");
			continue;
		}

		msg_type = data->val.uint8;

		if (sdp_get_access_protos(rec, &protos) < 0) {
			error("mce: cannot get mas instance sdp protocol list");
			continue;
		}

		scn = sdp_get_proto_port(protos, RFCOMM_UUID);

		sdp_list_foreach(protos, (sdp_list_func_t) sdp_list_free, NULL);
		sdp_list_free(protos, NULL);

		if (!scn) {
			error("mce: cannot get mas instance rfcomm channel");
			continue;
		}

		size += fill_mce_inst(buf + size, id, scn, msg_type, name,
								name_len);
		num_instances++;
	}

	status = HAL_STATUS_SUCCESS;

fail:
	ev->num_instances = num_instances;
	ev->status = status;

	ipc_send_notif(hal_ipc, HAL_SERVICE_ID_MAP_CLIENT,
			HAL_EV_MAP_CLIENT_REMOTE_MAS_INSTANCES, size, buf);
}

static void handle_get_instances(const void *buf, uint16_t len)
{
	const struct hal_cmd_map_client_get_instances *cmd = buf;
	uint8_t status;
	bdaddr_t *dst;
	uuid_t uuid;

	DBG("");

	dst = new0(bdaddr_t, 1);
	if (!dst) {
		error("mce: Fail to allocate cb data");
		status = HAL_STATUS_FAILED;
		goto failed;
	}

	android2bdaddr(&cmd->bdaddr, dst);
	sdp_uuid16_create(&uuid, MAP_MSE_SVCLASS_ID);

	if (bt_search_service(&adapter_addr, dst, &uuid,
				map_client_sdp_search_cb, dst, free, 0)) {
		error("mce: Failed to search SDP details");
		status = HAL_STATUS_FAILED;
		goto failed;
	}

	status = HAL_STATUS_SUCCESS;

failed:
	ipc_send_rsp(hal_ipc, HAL_SERVICE_ID_MAP_CLIENT,
				HAL_OP_MAP_CLIENT_GET_INSTANCES, status);
}

static const struct ipc_handler cmd_handlers[] = {
	/* HAL_OP_MAP_CLIENT_GET_INSTANCES */
	{ handle_get_instances, false,
			sizeof(struct hal_cmd_map_client_get_instances) },
};

bool bt_map_client_register(struct ipc *ipc, const bdaddr_t *addr, uint8_t mode)
{
	DBG("");

	bacpy(&adapter_addr, addr);

	hal_ipc = ipc;

	ipc_register(hal_ipc, HAL_SERVICE_ID_MAP_CLIENT, cmd_handlers,
						G_N_ELEMENTS(cmd_handlers));

	return true;
}

void bt_map_client_unregister(void)
{
	DBG("");

	ipc_unregister(hal_ipc, HAL_SERVICE_ID_MAP_CLIENT);
	hal_ipc = NULL;
}