Ejemplo n.º 1
0
static uint8_t att_mtu_rsp(struct bt_att *att, struct net_buf *buf)
{
	struct bt_att_exchange_mtu_rsp *rsp;
	uint16_t mtu;

	if (!att) {
		return 0;
	}

	rsp = (void *)buf->data;

	mtu = sys_le16_to_cpu(rsp->mtu);

	BT_DBG("Server MTU %u", mtu);

	/* Check if MTU is valid */
	if (mtu < BT_ATT_DEFAULT_LE_MTU) {
		return att_handle_rsp(att, NULL, 0, BT_ATT_ERR_INVALID_PDU);
	}

	att->chan.rx.mtu = min(mtu, CONFIG_BLUETOOTH_ATT_MTU);

	/* BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part F] page 484:
	 *
	 * A device's Exchange MTU Request shall contain the same MTU as the
	 * device's Exchange MTU Response (i.e. the MTU shall be symmetric).
	 */
	att->chan.tx.mtu = att->chan.rx.mtu;

	BT_DBG("Negotiated MTU %u", att->chan.rx.mtu);

	return att_handle_rsp(att, rsp, buf->len, 0);
}
Ejemplo n.º 2
0
static uint8_t att_handle_exec_write_rsp(struct bt_att *att,
					 struct net_buf *buf)
{
	BT_DBG("");

	return att_handle_rsp(att, buf->data, buf->len, 0);
}
Ejemplo n.º 3
0
static void bt_att_disconnected(struct bt_l2cap_chan *chan)
{
	struct bt_att *att = CONTAINER_OF(chan, struct bt_att, chan);

	BT_DBG("chan %p cid 0x%04x", chan, chan->tx.cid);

	/* Notify client if request is pending */
	att_handle_rsp(att, NULL, 0, BT_ATT_ERR_UNLIKELY);

	bt_gatt_disconnected(chan->conn);
	memset(att, 0, sizeof(*att));
}
Ejemplo n.º 4
0
static uint8_t att_error_rsp(struct bt_att *att, struct net_buf *buf)
{
	struct bt_att_req *req = &att->req;
	struct bt_att_error_rsp *rsp;
	struct bt_att_hdr *hdr;
	uint8_t err;

	rsp = (void *)buf->data;

	BT_DBG("request 0x%02x handle 0x%04x error 0x%02x", rsp->request,
	       sys_le16_to_cpu(rsp->handle), rsp->error);

	if (!req->buf) {
		err = BT_ATT_ERR_UNLIKELY;
		goto done;
	}

	hdr = (void *)req->buf->data;

	err = rsp->request == hdr->code ? rsp->error : BT_ATT_ERR_UNLIKELY;
#if defined(CONFIG_BLUETOOTH_SMP)
	if (req->retrying) {
		goto done;
	}

	/* Check if security needs to be changed */
	if (!att_change_security(att->chan.conn, err)) {
		req->retrying = true;
		/* Wait security_changed: TODO: Handle fail case */
		return 0;
	}
#endif /* CONFIG_BLUETOOTH_SMP */

done:
	return att_handle_rsp(att, NULL, 0, err);
}