7fdb42a46f
In order to support more standard descriptors, the PF macro and helper function are added. Change-Id: I52db3c32f40f39b9c6bfdb9573d0a614d0f3295e Signed-off-by: Louis Caron <louis.caron@intel.com>
1591 lines
36 KiB
C
1591 lines
36 KiB
C
/* gatt.c - Generic Attribute Profile handling */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <nanokernel.h>
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#include <toolchain.h>
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#include <string.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <atomic.h>
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#include <misc/byteorder.h>
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#include <misc/util.h>
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#include <bluetooth/log.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/uuid.h>
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#include <bluetooth/gatt.h>
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#include <bluetooth/driver.h>
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#include "hci_core.h"
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#include "conn_internal.h"
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#include "keys.h"
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#include "l2cap_internal.h"
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#include "att.h"
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#include "smp.h"
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#include "gatt_internal.h"
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#if !defined(CONFIG_BLUETOOTH_DEBUG_GATT)
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#undef BT_DBG
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#define BT_DBG(fmt, ...)
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#endif
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static struct bt_gatt_attr *db;
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#if defined(CONFIG_BLUETOOTH_GATT_CLIENT)
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static struct bt_gatt_subscribe_params *subscriptions;
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#endif /* CONFIG_BLUETOOTH_GATT_CLIENT */
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int bt_gatt_register(struct bt_gatt_attr *attrs, size_t count)
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{
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struct bt_gatt_attr *last;
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uint16_t handle;
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if (!attrs || !count) {
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return -EINVAL;
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}
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if (!db) {
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db = attrs;
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last = NULL;
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handle = 0;
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goto populate;
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}
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/* Fast forward to last attribute in the list */
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for (last = db; last->_next;) {
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last = last->_next;
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}
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handle = last->handle;
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last->_next = attrs;
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populate:
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/* Populate the handles and _next pointers */
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for (; attrs && count; attrs++, count--) {
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if (!attrs->handle) {
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/* Allocate handle if not set already */
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attrs->handle = ++handle;
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} else if (attrs->handle > handle) {
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/* Use existing handle if valid */
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handle = attrs->handle;
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} else {
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/* Service has conflicting handles */
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last->_next = NULL;
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BT_ERR("Unable to register handle 0x%04x",
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attrs->handle);
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return -EINVAL;
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}
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if (count > 1) {
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attrs->_next = &attrs[1];
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}
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BT_DBG("attr %p next %p handle 0x%04x uuid %s perm 0x%02x",
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attrs, attrs->_next, attrs->handle,
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bt_uuid_str(attrs->uuid), attrs->perm);
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}
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return 0;
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}
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int bt_gatt_attr_read(struct bt_conn *conn, const struct bt_gatt_attr *attr,
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void *buf, uint16_t buf_len, uint16_t offset,
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const void *value, uint16_t value_len)
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{
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uint16_t len;
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if (offset > value_len) {
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return -EINVAL;
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}
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len = min(buf_len, value_len - offset);
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BT_DBG("handle 0x%04x offset %u length %u", attr->handle, offset,
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len);
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memcpy(buf, value + offset, len);
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return len;
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}
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int bt_gatt_attr_read_service(struct bt_conn *conn,
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const struct bt_gatt_attr *attr,
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void *buf, uint16_t len, uint16_t offset)
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{
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struct bt_uuid *uuid = attr->user_data;
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if (uuid->type == BT_UUID_16) {
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uint16_t uuid16 = sys_cpu_to_le16(uuid->u16);
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return bt_gatt_attr_read(conn, attr, buf, len, offset, &uuid16,
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sizeof(uuid16));
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}
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return bt_gatt_attr_read(conn, attr, buf, len, offset, uuid->u128,
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sizeof(uuid->u128));
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}
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struct gatt_incl {
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uint16_t start_handle;
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uint16_t end_handle;
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union {
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uint16_t uuid16;
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uint8_t uuid[16];
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};
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} __packed;
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int bt_gatt_attr_read_included(struct bt_conn *conn,
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const struct bt_gatt_attr *attr,
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void *buf, uint16_t len, uint16_t offset)
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{
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struct bt_gatt_include *incl = attr->user_data;
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struct gatt_incl pdu;
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uint8_t value_len;
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pdu.start_handle = sys_cpu_to_le16(incl->start_handle);
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pdu.end_handle = sys_cpu_to_le16(incl->end_handle);
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value_len = sizeof(pdu.start_handle) + sizeof(pdu.end_handle);
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if (incl->uuid->type == BT_UUID_16) {
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pdu.uuid16 = sys_cpu_to_le16(incl->uuid->u16);
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value_len += sizeof(pdu.uuid16);
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} else {
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memcpy(pdu.uuid, incl->uuid->u128, sizeof(incl->uuid->u128));
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value_len += sizeof(incl->uuid->u128);
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}
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return bt_gatt_attr_read(conn, attr, buf, len, offset, &pdu, value_len);
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}
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struct gatt_chrc {
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uint8_t properties;
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uint16_t value_handle;
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union {
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uint16_t uuid16;
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uint8_t uuid[16];
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};
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} __packed;
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int bt_gatt_attr_read_chrc(struct bt_conn *conn,
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const struct bt_gatt_attr *attr, void *buf,
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uint16_t len, uint16_t offset)
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{
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struct bt_gatt_chrc *chrc = attr->user_data;
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struct gatt_chrc pdu;
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uint8_t value_len;
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pdu.properties = chrc->properties;
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/* BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part G] page 534:
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* 3.3.2 Characteristic Value Declaration
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* The Characteristic Value declaration contains the value of the
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* characteristic. It is the first Attribute after the characteristic
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* declaration. All characteristic definitions shall have a
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* Characteristic Value declaration.
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*/
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if (!attr->_next) {
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BT_WARN("Characteritic at 0x%04x don't have descriptor",
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attr->handle);
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pdu.value_handle = 0x0000;
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} else {
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pdu.value_handle = sys_cpu_to_le16(attr->_next->handle);
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}
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value_len = sizeof(pdu.properties) + sizeof(pdu.value_handle);
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if (chrc->uuid->type == BT_UUID_16) {
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pdu.uuid16 = sys_cpu_to_le16(chrc->uuid->u16);
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value_len += sizeof(pdu.uuid16);
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} else {
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memcpy(pdu.uuid, chrc->uuid->u128, sizeof(chrc->uuid->u128));
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value_len += sizeof(chrc->uuid->u128);
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}
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return bt_gatt_attr_read(conn, attr, buf, len, offset, &pdu, value_len);
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}
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void bt_gatt_foreach_attr(uint16_t start_handle, uint16_t end_handle,
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bt_gatt_attr_func_t func, void *user_data)
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{
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const struct bt_gatt_attr *attr;
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for (attr = db; attr; attr = attr->_next) {
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/* Check if attribute handle is within range */
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if (attr->handle < start_handle || attr->handle > end_handle) {
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continue;
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}
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if (func(attr, user_data) == BT_GATT_ITER_STOP) {
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break;
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}
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}
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}
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int bt_gatt_attr_read_ccc(struct bt_conn *conn,
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const struct bt_gatt_attr *attr, void *buf,
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uint16_t len, uint16_t offset)
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{
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struct _bt_gatt_ccc *ccc = attr->user_data;
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uint16_t value;
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size_t i;
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for (i = 0; i < ccc->cfg_len; i++) {
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if (bt_addr_le_cmp(&ccc->cfg[i].peer, &conn->le.dst)) {
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continue;
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}
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value = sys_cpu_to_le16(ccc->cfg[i].value);
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break;
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}
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/* Default to disable if there is no cfg for the peer */
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if (i == ccc->cfg_len) {
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value = 0x0000;
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}
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return bt_gatt_attr_read(conn, attr, buf, len, offset, &value,
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sizeof(value));
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}
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static void gatt_ccc_changed(struct _bt_gatt_ccc *ccc)
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{
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int i;
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uint16_t value = 0x0000;
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for (i = 0; i < ccc->cfg_len; i++) {
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if (ccc->cfg[i].value > value) {
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value = ccc->cfg[i].value;
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}
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}
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BT_DBG("ccc %p value 0x%04x", ccc, value);
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if (value != ccc->value) {
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ccc->value = value;
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ccc->cfg_changed(value);
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}
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}
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int bt_gatt_attr_write_ccc(struct bt_conn *conn,
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const struct bt_gatt_attr *attr, const void *buf,
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uint16_t len, uint16_t offset)
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{
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struct _bt_gatt_ccc *ccc = attr->user_data;
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const uint16_t *data = buf;
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bool bonded;
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size_t i;
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if (offset > sizeof(*data)) {
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return -EINVAL;
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}
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if (offset + len > sizeof(*data)) {
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return -EFBIG;
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}
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if (bt_keys_find_addr(&conn->le.dst))
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bonded = true;
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else
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bonded = false;
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for (i = 0; i < ccc->cfg_len; i++) {
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/* Check for existing configuration */
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if (!bt_addr_le_cmp(&ccc->cfg[i].peer, &conn->le.dst)) {
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break;
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}
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}
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if (i == ccc->cfg_len) {
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for (i = 0; i < ccc->cfg_len; i++) {
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/* Check for unused configuration */
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if (!ccc->cfg[i].valid) {
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bt_addr_le_copy(&ccc->cfg[i].peer, &conn->le.dst);
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/* Only set valid if bonded */
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ccc->cfg[i].valid = bonded;
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break;
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}
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}
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if (i == ccc->cfg_len) {
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BT_WARN("No space to store CCC cfg");
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return -ENOMEM;
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}
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}
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ccc->cfg[i].value = sys_le16_to_cpu(*data);
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BT_DBG("handle 0x%04x value %u", attr->handle, ccc->cfg[i].value);
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/* Update cfg if don't match */
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if (ccc->cfg[i].value != ccc->value) {
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gatt_ccc_changed(ccc);
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}
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return len;
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}
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int bt_gatt_attr_read_cep(struct bt_conn *conn,
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const struct bt_gatt_attr *attr, void *buf,
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uint16_t len, uint16_t offset)
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{
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struct bt_gatt_cep *value = attr->user_data;
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uint16_t props = sys_cpu_to_le16(value->properties);
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return bt_gatt_attr_read(conn, attr, buf, len, offset, &props,
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sizeof(props));
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}
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int bt_gatt_attr_read_cud(struct bt_conn *conn,
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const struct bt_gatt_attr *attr, void *buf,
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uint16_t len, uint16_t offset)
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{
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char *value = attr->user_data;
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return bt_gatt_attr_read(conn, attr, buf, len, offset, value, strlen(value));
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}
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int bt_gatt_attr_read_cpf(struct bt_conn *conn,
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const struct bt_gatt_attr *attr, void *buf,
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uint16_t len, uint16_t offset)
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{
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struct bt_gatt_cpf *value = attr->user_data;
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return bt_gatt_attr_read(conn, attr, buf, len, offset, value,
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sizeof(*value));
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}
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struct notify_data {
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const void *data;
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size_t len;
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uint16_t handle;
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};
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static int att_notify(struct bt_conn *conn, uint16_t handle, const void *data,
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size_t len)
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{
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struct net_buf *buf;
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struct bt_att_notify *nfy;
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buf = bt_att_create_pdu(conn, BT_ATT_OP_NOTIFY, sizeof(*nfy) + len);
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if (!buf) {
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BT_WARN("No buffer available to send notification");
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return -ENOMEM;
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}
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BT_DBG("conn %p handle 0x%04x", conn, handle);
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nfy = net_buf_add(buf, sizeof(*nfy));
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nfy->handle = sys_cpu_to_le16(handle);
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net_buf_add(buf, len);
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memcpy(nfy->value, data, len);
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bt_l2cap_send(conn, BT_L2CAP_CID_ATT, buf);
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return 0;
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}
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static uint8_t notify_cb(const struct bt_gatt_attr *attr, void *user_data)
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{
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struct notify_data *data = user_data;
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struct _bt_gatt_ccc *ccc;
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size_t i;
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if (bt_uuid_cmp(attr->uuid, BT_UUID_GATT_CCC)) {
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/* Stop if we reach the next characteristic */
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if (!bt_uuid_cmp(attr->uuid, BT_UUID_GATT_CHRC)) {
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return BT_GATT_ITER_STOP;
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}
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return BT_GATT_ITER_CONTINUE;
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}
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/* Check attribute user_data must be of type struct _bt_gatt_ccc */
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if (attr->write != bt_gatt_attr_write_ccc) {
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return BT_GATT_ITER_CONTINUE;
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}
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ccc = attr->user_data;
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/* Notify all peers configured */
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for (i = 0; i < ccc->cfg_len; i++) {
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struct bt_conn *conn;
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/* TODO: Handle indications */
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if (ccc->value != BT_GATT_CCC_NOTIFY) {
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continue;
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}
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conn = bt_conn_lookup_addr_le(&ccc->cfg[i].peer);
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if (!conn || conn->state != BT_CONN_CONNECTED) {
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continue;
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}
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if (att_notify(conn, data->handle, data->data, data->len) < 0) {
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bt_conn_unref(conn);
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return BT_GATT_ITER_STOP;
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}
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bt_conn_unref(conn);
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}
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return BT_GATT_ITER_CONTINUE;
|
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}
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int bt_gatt_notify(struct bt_conn *conn, uint16_t handle, const void *data,
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uint16_t len)
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{
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struct notify_data nfy;
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if (conn) {
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return att_notify(conn, handle, data, len);
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}
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nfy.handle = handle;
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nfy.data = data;
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nfy.len = len;
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bt_gatt_foreach_attr(handle, 0xffff, notify_cb, &nfy);
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return 0;
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}
|
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static uint8_t connected_cb(const struct bt_gatt_attr *attr, void *user_data)
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{
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struct bt_conn *conn = user_data;
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struct _bt_gatt_ccc *ccc;
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size_t i;
|
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|
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/* Check attribute user_data must be of type struct _bt_gatt_ccc */
|
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if (attr->write != bt_gatt_attr_write_ccc) {
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return BT_GATT_ITER_CONTINUE;
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}
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ccc = attr->user_data;
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/* If already enabled skip */
|
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if (ccc->value) {
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return BT_GATT_ITER_CONTINUE;
|
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}
|
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|
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for (i = 0; i < ccc->cfg_len; i++) {
|
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/* Ignore configuration for different peer */
|
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if (bt_addr_le_cmp(&conn->le.dst, &ccc->cfg[i].peer)) {
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continue;
|
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}
|
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|
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if (ccc->cfg[i].value) {
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gatt_ccc_changed(ccc);
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return BT_GATT_ITER_CONTINUE;
|
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}
|
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}
|
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|
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return BT_GATT_ITER_CONTINUE;
|
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}
|
||
|
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void bt_gatt_connected(struct bt_conn *conn)
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{
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BT_DBG("conn %p", conn);
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bt_gatt_foreach_attr(0x0001, 0xffff, connected_cb, conn);
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}
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static uint8_t disconnected_cb(const struct bt_gatt_attr *attr, void *user_data)
|
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{
|
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struct bt_conn *conn = user_data;
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struct _bt_gatt_ccc *ccc;
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size_t i;
|
||
|
||
/* Check attribute user_data must be of type struct _bt_gatt_ccc */
|
||
if (attr->write != bt_gatt_attr_write_ccc) {
|
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return BT_GATT_ITER_CONTINUE;
|
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}
|
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|
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ccc = attr->user_data;
|
||
|
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/* If already disabled skip */
|
||
if (!ccc->value) {
|
||
return BT_GATT_ITER_CONTINUE;
|
||
}
|
||
|
||
for (i = 0; i < ccc->cfg_len; i++) {
|
||
/* Ignore configurations with disabled value */
|
||
if (!ccc->cfg[i].value) {
|
||
continue;
|
||
}
|
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|
||
if (bt_addr_le_cmp(&conn->le.dst, &ccc->cfg[i].peer)) {
|
||
struct bt_conn *tmp;
|
||
|
||
/* Skip if there is another peer connected */
|
||
tmp = bt_conn_lookup_addr_le(&ccc->cfg[i].peer);
|
||
if (tmp && tmp->state == BT_CONN_CONNECTED) {
|
||
bt_conn_unref(tmp);
|
||
return BT_GATT_ITER_CONTINUE;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Reset value while disconnected */
|
||
memset(&ccc->value, 0, sizeof(ccc->value));
|
||
ccc->cfg_changed(ccc->value);
|
||
|
||
BT_DBG("ccc %p reseted", ccc);
|
||
|
||
return BT_GATT_ITER_CONTINUE;
|
||
}
|
||
|
||
#if defined(CONFIG_BLUETOOTH_GATT_CLIENT)
|
||
void bt_gatt_notification(struct bt_conn *conn, uint16_t handle,
|
||
const void *data, uint16_t length)
|
||
{
|
||
struct bt_gatt_subscribe_params *params;
|
||
|
||
BT_DBG("handle 0x%04x length %u", handle, length);
|
||
|
||
for (params = subscriptions; params; params = params->_next) {
|
||
if (handle != params->value_handle) {
|
||
continue;
|
||
}
|
||
|
||
if (params->func(conn, 0, data, length) == BT_GATT_ITER_STOP) {
|
||
bt_gatt_unsubscribe(conn, params);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void gatt_subscription_remove(struct bt_gatt_subscribe_params *prev,
|
||
struct bt_gatt_subscribe_params *params)
|
||
{
|
||
/* Remove subscription from the list*/
|
||
if (!prev) {
|
||
subscriptions = params->_next;
|
||
} else {
|
||
prev->_next = params->_next;
|
||
}
|
||
|
||
if (params->destroy)
|
||
params->destroy(params);
|
||
}
|
||
|
||
static void remove_subscribtions(struct bt_conn *conn)
|
||
{
|
||
struct bt_gatt_subscribe_params *params, *prev;
|
||
|
||
/* Lookup existing subscriptions */
|
||
for (params = subscriptions, prev = NULL; params;
|
||
prev = params, params = params->_next) {
|
||
if (bt_addr_le_cmp(¶ms->_peer, &conn->le.dst)) {
|
||
continue;
|
||
}
|
||
|
||
/* Remove subscription */
|
||
gatt_subscription_remove(prev, params);
|
||
}
|
||
}
|
||
|
||
static void gatt_mtu_rsp(struct bt_conn *conn, uint8_t err, const void *pdu,
|
||
uint16_t length, void *user_data)
|
||
{
|
||
bt_gatt_rsp_func_t func = user_data;
|
||
|
||
func(conn, err);
|
||
}
|
||
|
||
static int gatt_send(struct bt_conn *conn, struct net_buf *buf,
|
||
bt_att_func_t func, void *user_data,
|
||
bt_att_destroy_t destroy)
|
||
{
|
||
int err;
|
||
|
||
err = bt_att_send(conn, buf, func, user_data, destroy);
|
||
if (err) {
|
||
BT_ERR("Error sending ATT PDU: %d", err);
|
||
net_buf_unref(buf);
|
||
}
|
||
|
||
return err;
|
||
}
|
||
|
||
int bt_gatt_exchange_mtu(struct bt_conn *conn, bt_gatt_rsp_func_t func)
|
||
{
|
||
struct bt_att_exchange_mtu_req *req;
|
||
struct net_buf *buf;
|
||
uint16_t mtu;
|
||
|
||
if (!conn || !func) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_MTU_REQ, sizeof(*req));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
mtu = CONFIG_BLUETOOTH_ATT_MTU;
|
||
|
||
BT_DBG("Client MTU %u", mtu);
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->mtu = sys_cpu_to_le16(mtu);
|
||
|
||
return gatt_send(conn, buf, gatt_mtu_rsp, func, NULL);
|
||
}
|
||
|
||
static void att_find_type_rsp(struct bt_conn *conn, uint8_t err,
|
||
const void *pdu, uint16_t length,
|
||
void *user_data)
|
||
{
|
||
const struct bt_att_find_type_rsp *rsp = pdu;
|
||
struct bt_gatt_discover_params *params = user_data;
|
||
struct bt_gatt_service value;
|
||
uint8_t i;
|
||
uint16_t end_handle = 0, start_handle;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
if (err) {
|
||
goto done;
|
||
}
|
||
|
||
/* Parse attributes found */
|
||
for (i = 0; length >= sizeof(rsp->list[i]);
|
||
i++, length -= sizeof(rsp->list[i])) {
|
||
struct bt_gatt_attr *attr;
|
||
|
||
start_handle = sys_le16_to_cpu(rsp->list[i].start_handle);
|
||
end_handle = sys_le16_to_cpu(rsp->list[i].end_handle);
|
||
|
||
BT_DBG("start_handle 0x%04x end_handle 0x%04x", start_handle,
|
||
end_handle);
|
||
|
||
value.end_handle = end_handle;
|
||
value.uuid = params->uuid;
|
||
|
||
if (params->type == BT_GATT_DISCOVER_PRIMARY) {
|
||
attr = (&(struct bt_gatt_attr)
|
||
BT_GATT_PRIMARY_SERVICE(&value));
|
||
} else {
|
||
attr = (&(struct bt_gatt_attr)
|
||
BT_GATT_SECONDARY_SERVICE(&value));
|
||
}
|
||
|
||
attr->handle = start_handle;
|
||
|
||
if (params->func(conn, attr, params) == BT_GATT_ITER_STOP) {
|
||
goto done;
|
||
}
|
||
}
|
||
|
||
/* Stop if could not parse the whole PDU */
|
||
if (length > 0) {
|
||
goto done;
|
||
}
|
||
|
||
/* Stop if over the range or the requests */
|
||
if (end_handle >= params->end_handle) {
|
||
goto done;
|
||
}
|
||
|
||
/* Continue for the last found handle */
|
||
params->start_handle = end_handle;
|
||
if (!bt_gatt_discover(conn, params)) {
|
||
return;
|
||
}
|
||
|
||
done:
|
||
if (params->destroy) {
|
||
params->destroy(params);
|
||
}
|
||
}
|
||
|
||
static int att_find_type(struct bt_conn *conn,
|
||
struct bt_gatt_discover_params *params)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_find_type_req *req;
|
||
uint16_t *value;
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_FIND_TYPE_REQ, sizeof(*req));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->start_handle = sys_cpu_to_le16(params->start_handle);
|
||
req->end_handle = sys_cpu_to_le16(params->end_handle);
|
||
|
||
if (params->type == BT_GATT_DISCOVER_PRIMARY) {
|
||
req->type = sys_cpu_to_le16(BT_UUID_GATT_PRIMARY->u16);
|
||
} else {
|
||
req->type = sys_cpu_to_le16(BT_UUID_GATT_SECONDARY->u16);
|
||
}
|
||
|
||
BT_DBG("uuid %s start_handle 0x%04x end_handle 0x%04x",
|
||
bt_uuid_str(params->uuid), params->start_handle,
|
||
params->end_handle);
|
||
|
||
switch (params->uuid->type) {
|
||
case BT_UUID_16:
|
||
value = net_buf_add(buf, sizeof(*value));
|
||
*value = sys_cpu_to_le16(params->uuid->u16);
|
||
break;
|
||
case BT_UUID_128:
|
||
net_buf_add(buf, sizeof(params->uuid->u128));
|
||
memcpy(req->value, params->uuid->u128,
|
||
sizeof(params->uuid->u128));
|
||
break;
|
||
default:
|
||
BT_ERR("Unknown UUID type %u", params->uuid->type);
|
||
net_buf_unref(buf);
|
||
return -EINVAL;
|
||
}
|
||
|
||
return gatt_send(conn, buf, att_find_type_rsp, params, NULL);
|
||
}
|
||
|
||
static uint16_t parse_include(struct bt_conn *conn, const void *pdu,
|
||
struct bt_gatt_discover_params *params,
|
||
uint16_t length)
|
||
{
|
||
const struct bt_att_read_type_rsp *rsp = pdu;
|
||
struct bt_uuid uuid;
|
||
uint16_t handle = 0;
|
||
struct bt_gatt_include value;
|
||
|
||
/* Data can be either in UUID16 or UUID128 */
|
||
switch (rsp->len) {
|
||
case 8: /* UUID16 */
|
||
uuid.type = BT_UUID_16;
|
||
break;
|
||
case 6: /* UUID128 */
|
||
/* BLUETOOTH SPECIFICATION Version 4.2 [Vol 3, Part G] page 550
|
||
* To get the included service UUID when the included service
|
||
* uses a 128-bit UUID, the Read Request is used.
|
||
*/
|
||
uuid.type = BT_UUID_128;
|
||
break;
|
||
default:
|
||
BT_ERR("Invalid data len %u", rsp->len);
|
||
goto done;
|
||
}
|
||
|
||
/* Parse include found */
|
||
for (length--, pdu = rsp->data; length >= rsp->len;
|
||
length -= rsp->len, pdu += rsp->len) {
|
||
struct bt_gatt_attr *attr;
|
||
const struct bt_att_data *data = pdu;
|
||
struct gatt_incl *incl = (void *)data->value;
|
||
|
||
handle = sys_le16_to_cpu(data->handle);
|
||
/* Handle 0 is invalid */
|
||
if (!handle) {
|
||
goto done;
|
||
}
|
||
|
||
/* Convert include data, bt_gatt_incl and gatt_incl
|
||
* have different formats so the conversion have to be done
|
||
* field by field.
|
||
*/
|
||
value.start_handle = incl->start_handle;
|
||
value.end_handle = incl->end_handle;
|
||
|
||
switch(uuid.type) {
|
||
case BT_UUID_16:
|
||
value.uuid = &uuid;
|
||
uuid.u16 = sys_le16_to_cpu(incl->uuid16);
|
||
break;
|
||
case BT_UUID_128:
|
||
/* Data is not available at this point */
|
||
break;
|
||
}
|
||
|
||
BT_DBG("handle 0x%04x uuid %s start_handle 0x%04x "
|
||
"end_handle 0x%04x\n", handle, bt_uuid_str(&uuid),
|
||
value.start_handle, value.end_handle);
|
||
|
||
/* Skip if UUID is set but doesn't match */
|
||
if (params->uuid && bt_uuid_cmp(&uuid, params->uuid)) {
|
||
continue;
|
||
}
|
||
|
||
attr = (&(struct bt_gatt_attr)BT_GATT_INCLUDE_SERVICE(&value));
|
||
attr->handle = handle;
|
||
|
||
if (params->func(conn, attr, params) == BT_GATT_ITER_STOP) {
|
||
handle = 0;
|
||
goto done;
|
||
}
|
||
}
|
||
|
||
/* Stop if could not parse the whole PDU */
|
||
if (length > 0) {
|
||
return 0;
|
||
}
|
||
|
||
done:
|
||
return handle;
|
||
}
|
||
|
||
static uint16_t parse_characteristic(struct bt_conn *conn, const void *pdu,
|
||
struct bt_gatt_discover_params *params,
|
||
uint16_t length)
|
||
{
|
||
const struct bt_att_read_type_rsp *rsp = pdu;
|
||
struct bt_uuid uuid;
|
||
uint16_t handle = 0;
|
||
|
||
/* Data can be either in UUID16 or UUID128 */
|
||
switch (rsp->len) {
|
||
case 7: /* UUID16 */
|
||
uuid.type = BT_UUID_16;
|
||
break;
|
||
case 21: /* UUID128 */
|
||
uuid.type = BT_UUID_128;
|
||
break;
|
||
default:
|
||
BT_ERR("Invalid data len %u", rsp->len);
|
||
goto done;
|
||
}
|
||
|
||
/* Parse characteristics found */
|
||
for (length--, pdu = rsp->data; length >= rsp->len;
|
||
length -= rsp->len, pdu += rsp->len) {
|
||
struct bt_gatt_attr *attr;
|
||
const struct bt_att_data *data = pdu;
|
||
struct gatt_chrc *chrc = (void *)data->value;
|
||
|
||
handle = sys_le16_to_cpu(data->handle);
|
||
/* Handle 0 is invalid */
|
||
if (!handle) {
|
||
goto done;
|
||
}
|
||
|
||
switch(uuid.type) {
|
||
case BT_UUID_16:
|
||
uuid.u16 = sys_le16_to_cpu(chrc->uuid16);
|
||
break;
|
||
case BT_UUID_128:
|
||
memcpy(uuid.u128, chrc->uuid, sizeof(chrc->uuid));
|
||
break;
|
||
}
|
||
|
||
BT_DBG("handle 0x%04x uuid %s properties 0x%02x", handle,
|
||
bt_uuid_str(&uuid), chrc->properties);
|
||
|
||
/* Skip if UUID is set but doesn't match */
|
||
if (params->uuid && bt_uuid_cmp(&uuid, params->uuid)) {
|
||
continue;
|
||
}
|
||
|
||
attr = (&(struct bt_gatt_attr)BT_GATT_CHARACTERISTIC(&uuid,
|
||
chrc->properties));
|
||
attr->handle = handle;
|
||
|
||
if (params->func(conn, attr, params) == BT_GATT_ITER_STOP) {
|
||
handle = 0;
|
||
goto done;
|
||
}
|
||
}
|
||
|
||
/* Stop if could not parse the whole PDU */
|
||
if (length > 0) {
|
||
return 0;
|
||
}
|
||
|
||
done:
|
||
return handle;
|
||
}
|
||
|
||
static void att_read_type_rsp(struct bt_conn *conn, uint8_t err,
|
||
const void *pdu, uint16_t length,
|
||
void *user_data)
|
||
{
|
||
struct bt_gatt_discover_params *params = user_data;
|
||
uint16_t handle;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
if (err) {
|
||
goto done;
|
||
}
|
||
|
||
if (params->type == BT_GATT_DISCOVER_INCLUDE) {
|
||
handle = parse_include(conn, pdu, params, length);
|
||
} else {
|
||
handle = parse_characteristic(conn, pdu, params, length);
|
||
}
|
||
|
||
if (!handle) {
|
||
goto done;
|
||
}
|
||
|
||
/* Continue from the last handle */
|
||
params->start_handle = handle;
|
||
if (params->start_handle < UINT16_MAX) {
|
||
params->start_handle++;
|
||
}
|
||
|
||
/* Stop if over the requested range */
|
||
if (params->start_handle >= params->end_handle) {
|
||
goto done;
|
||
}
|
||
|
||
/* Continue to the next range */
|
||
if (!bt_gatt_discover(conn, params)) {
|
||
return;
|
||
}
|
||
|
||
done:
|
||
if (params->destroy) {
|
||
params->destroy(params);
|
||
}
|
||
}
|
||
|
||
static int att_read_type(struct bt_conn *conn,
|
||
struct bt_gatt_discover_params *params)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_read_type_req *req;
|
||
uint16_t *value;
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_READ_TYPE_REQ, sizeof(*req));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->start_handle = sys_cpu_to_le16(params->start_handle);
|
||
req->end_handle = sys_cpu_to_le16(params->end_handle);
|
||
|
||
value = net_buf_add(buf, sizeof(*value));
|
||
if (params->type == BT_GATT_DISCOVER_INCLUDE)
|
||
*value = sys_cpu_to_le16(BT_UUID_GATT_INCLUDE->u16);
|
||
else
|
||
*value = sys_cpu_to_le16(BT_UUID_GATT_CHRC->u16);
|
||
|
||
BT_DBG("start_handle 0x%04x end_handle 0x%04x", params->start_handle,
|
||
params->end_handle);
|
||
|
||
return gatt_send(conn, buf, att_read_type_rsp, params, NULL);
|
||
}
|
||
|
||
static void att_find_info_rsp(struct bt_conn *conn, uint8_t err,
|
||
const void *pdu, uint16_t length,
|
||
void *user_data)
|
||
{
|
||
const struct bt_att_find_info_rsp *rsp = pdu;
|
||
struct bt_gatt_discover_params *params = user_data;
|
||
struct bt_uuid uuid;
|
||
uint16_t handle = 0;
|
||
uint8_t len;
|
||
union {
|
||
const struct bt_att_info_16 *i16;
|
||
const struct bt_att_info_128 *i128;
|
||
} info;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
if (err) {
|
||
goto done;
|
||
}
|
||
|
||
/* Data can be either in UUID16 or UUID128 */
|
||
switch (rsp->format) {
|
||
case BT_ATT_INFO_16:
|
||
uuid.type = BT_UUID_16;
|
||
len = sizeof(*info.i16);
|
||
break;
|
||
case BT_ATT_INFO_128:
|
||
uuid.type = BT_UUID_128;
|
||
len = sizeof(*info.i128);
|
||
break;
|
||
default:
|
||
BT_ERR("Invalid format %u", rsp->format);
|
||
goto done;
|
||
}
|
||
|
||
/* Parse descriptors found */
|
||
for (length--, pdu = rsp->info; length >= len;
|
||
length -= len, pdu += len) {
|
||
struct bt_gatt_attr *attr;
|
||
|
||
info.i16 = pdu;
|
||
handle = sys_le16_to_cpu(info.i16->handle);
|
||
|
||
switch (uuid.type) {
|
||
case BT_UUID_16:
|
||
uuid.u16 = sys_le16_to_cpu(info.i16->uuid);
|
||
break;
|
||
case BT_UUID_128:
|
||
memcpy(uuid.u128, info.i128->uuid, sizeof(uuid.u128));
|
||
break;
|
||
}
|
||
|
||
BT_DBG("handle 0x%04x uuid %s", handle, bt_uuid_str(&uuid));
|
||
|
||
/* Skip if UUID is set but doesn't match */
|
||
if (params->uuid && bt_uuid_cmp(&uuid, params->uuid)) {
|
||
continue;
|
||
}
|
||
|
||
attr = (&(struct bt_gatt_attr)
|
||
BT_GATT_DESCRIPTOR(&uuid, 0, NULL, NULL, NULL));
|
||
attr->handle = handle;
|
||
|
||
if (params->func(conn, attr, params) == BT_GATT_ITER_STOP) {
|
||
goto done;
|
||
}
|
||
}
|
||
|
||
/* Stop if could not parse the whole PDU */
|
||
if (length > 0) {
|
||
goto done;
|
||
}
|
||
|
||
/* Next characteristic shall be after current value handle */
|
||
params->start_handle = handle;
|
||
if (params->start_handle < UINT16_MAX) {
|
||
params->start_handle++;
|
||
}
|
||
|
||
/* Stop if over the requested range */
|
||
if (params->start_handle >= params->end_handle) {
|
||
goto done;
|
||
}
|
||
|
||
/* Continue to the next range */
|
||
if (!bt_gatt_discover(conn, params)) {
|
||
return;
|
||
}
|
||
|
||
done:
|
||
if (params->destroy) {
|
||
params->destroy(params);
|
||
}
|
||
}
|
||
|
||
static int att_find_info(struct bt_conn *conn,
|
||
struct bt_gatt_discover_params *params)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_find_info_req *req;
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_FIND_INFO_REQ, sizeof(*req));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->start_handle = sys_cpu_to_le16(params->start_handle);
|
||
req->end_handle = sys_cpu_to_le16(params->end_handle);
|
||
|
||
BT_DBG("start_handle 0x%04x end_handle 0x%04x", params->start_handle,
|
||
params->end_handle);
|
||
|
||
return gatt_send(conn, buf, att_find_info_rsp, params, NULL);
|
||
}
|
||
|
||
int bt_gatt_discover(struct bt_conn *conn,
|
||
struct bt_gatt_discover_params *params)
|
||
{
|
||
if (!conn || !params || !params->func || !params->start_handle ||
|
||
!params->end_handle || params->start_handle > params->end_handle) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
switch (params->type) {
|
||
case BT_GATT_DISCOVER_PRIMARY:
|
||
return att_find_type(conn, params);
|
||
case BT_GATT_DISCOVER_SECONDARY:
|
||
return att_find_type(conn, params);
|
||
case BT_GATT_DISCOVER_INCLUDE:
|
||
return att_read_type(conn, params);
|
||
case BT_GATT_DISCOVER_CHARACTERISTIC:
|
||
return att_read_type(conn, params);
|
||
case BT_GATT_DISCOVER_DESCRIPTOR:
|
||
return att_find_info(conn, params);
|
||
default:
|
||
BT_ERR("Invalid discovery type: %u", params->type);
|
||
}
|
||
|
||
return -EINVAL;
|
||
}
|
||
|
||
static void att_read_rsp(struct bt_conn *conn, uint8_t err, const void *pdu,
|
||
uint16_t length, void *user_data)
|
||
{
|
||
struct bt_gatt_read_params *params = user_data;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
if (err) {
|
||
params->func(conn, err, NULL, 0);
|
||
goto done;
|
||
}
|
||
|
||
if (params->func(conn, 0, pdu, length) == BT_GATT_ITER_STOP) {
|
||
goto done;
|
||
}
|
||
|
||
/*
|
||
* Core Spec 4.2, Vol. 3, Part G, 4.8.1
|
||
* If the Characteristic Value is greater than (ATT_MTU – 1) octets
|
||
* in length, the Read Long Characteristic Value procedure may be used
|
||
* if the rest of the Characteristic Value is required.
|
||
*/
|
||
if (length < (bt_att_get_mtu(conn) - 1)) {
|
||
goto done;
|
||
}
|
||
|
||
params->offset += length;
|
||
|
||
/* Continue reading the attribute */
|
||
if (bt_gatt_read(conn, params) < 0) {
|
||
params->func(conn, BT_ATT_ERR_UNLIKELY, NULL, 0);
|
||
goto done;
|
||
}
|
||
|
||
return;
|
||
done:
|
||
if (params->destroy) {
|
||
params->destroy(params);
|
||
}
|
||
}
|
||
|
||
static int gatt_read_blob(struct bt_conn *conn,
|
||
struct bt_gatt_read_params *params)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_read_blob_req *req;
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_READ_BLOB_REQ, sizeof(*req));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->handle = sys_cpu_to_le16(params->handle);
|
||
req->offset = sys_cpu_to_le16(params->offset);
|
||
|
||
BT_DBG("handle 0x%04x offset 0x%04x", params->handle, params->offset);
|
||
|
||
return gatt_send(conn, buf, att_read_rsp, params, NULL);
|
||
}
|
||
|
||
int bt_gatt_read(struct bt_conn *conn, struct bt_gatt_read_params *params)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_read_req *req;
|
||
|
||
if (!conn || !params || !params->handle || !params->func ||
|
||
!params->destroy) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
if (params->offset) {
|
||
return gatt_read_blob(conn, params);
|
||
}
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_READ_REQ, sizeof(*req));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->handle = sys_cpu_to_le16(params->handle);
|
||
|
||
BT_DBG("handle 0x%04x", params->handle);
|
||
|
||
return gatt_send(conn, buf, att_read_rsp, params, NULL);
|
||
}
|
||
|
||
static void att_write_rsp(struct bt_conn *conn, uint8_t err, const void *pdu,
|
||
uint16_t length, void *user_data)
|
||
{
|
||
bt_gatt_rsp_func_t func = user_data;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
func(conn, err);
|
||
}
|
||
|
||
static bool write_signed_allowed(struct bt_conn *conn)
|
||
{
|
||
#if defined(CONFIG_BLUETOOTH_SMP)
|
||
return conn->encrypt == 0;
|
||
#else
|
||
return false;
|
||
#endif /* CONFIG_BLUETOOTH_SMP */
|
||
}
|
||
|
||
int bt_gatt_write_without_response(struct bt_conn *conn, uint16_t handle,
|
||
const void *data, uint16_t length, bool sign)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_write_cmd *cmd;
|
||
|
||
if (!conn || !handle) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
if (sign && write_signed_allowed(conn)) {
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_SIGNED_WRITE_CMD,
|
||
sizeof(*cmd) + length + 12);
|
||
} else {
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_WRITE_CMD,
|
||
sizeof(*cmd) + length);
|
||
}
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
cmd = net_buf_add(buf, sizeof(*cmd));
|
||
cmd->handle = sys_cpu_to_le16(handle);
|
||
memcpy(cmd->value, data, length);
|
||
net_buf_add(buf, length);
|
||
|
||
BT_DBG("handle 0x%04x length %u", handle, length);
|
||
|
||
return gatt_send(conn, buf, NULL, NULL, NULL);
|
||
}
|
||
|
||
static int gatt_exec_write(struct bt_conn *conn, bt_gatt_rsp_func_t func)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_exec_write_req *req;
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_EXEC_WRITE_REQ, sizeof(*req));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->flags = BT_ATT_FLAG_EXEC;
|
||
|
||
BT_DBG("");
|
||
|
||
return gatt_send(conn, buf, att_write_rsp, func, NULL);
|
||
}
|
||
|
||
struct prepare_write_data {
|
||
bt_gatt_rsp_func_t func;
|
||
const void *data;
|
||
uint16_t length;
|
||
uint16_t handle;
|
||
uint16_t offset;
|
||
};
|
||
|
||
static void att_prepare_write_rsp(struct bt_conn *conn, uint8_t err,
|
||
const void *pdu, uint16_t length,
|
||
void *user_data)
|
||
{
|
||
struct prepare_write_data *data = user_data;
|
||
bt_gatt_rsp_func_t func = data->func;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
/* Reset func so next prepare don't fail */
|
||
data->func = NULL;
|
||
|
||
/* Don't continue in case of error */
|
||
if (err) {
|
||
func(conn, err);
|
||
return;
|
||
}
|
||
|
||
/* If there is no more data execute */
|
||
if (!data->length) {
|
||
gatt_exec_write(conn, func);
|
||
return;
|
||
}
|
||
|
||
/* Write next chunk */
|
||
bt_gatt_write(conn, data->handle, data->offset, data->data,
|
||
data->length, func);
|
||
}
|
||
|
||
static int gatt_prepare_write(struct bt_conn *conn, uint16_t handle,
|
||
uint16_t offset, const void *data,
|
||
uint16_t length, bt_gatt_rsp_func_t func)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_prepare_write_req *req;
|
||
static struct prepare_write_data prep_data;
|
||
uint16_t len;
|
||
|
||
if (prep_data.func) {
|
||
return -EBUSY;
|
||
}
|
||
|
||
len = min(length, bt_att_get_mtu(conn) - sizeof(*req) - 1);
|
||
|
||
prep_data.func = func;
|
||
prep_data.handle = handle;
|
||
prep_data.offset = offset + len;
|
||
prep_data.data = data + len;
|
||
prep_data.length = length - len;
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_PREPARE_WRITE_REQ,
|
||
sizeof(*req) + len);
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->handle = sys_cpu_to_le16(handle);
|
||
req->offset = sys_cpu_to_le16(offset);
|
||
memcpy(req->value, data, len);
|
||
net_buf_add(buf, len);
|
||
|
||
BT_DBG("handle 0x%04x offset %u len %u", handle, offset, len);
|
||
|
||
return gatt_send(conn, buf, att_prepare_write_rsp, &prep_data, NULL);
|
||
}
|
||
|
||
int bt_gatt_write(struct bt_conn *conn, uint16_t handle, uint16_t offset,
|
||
const void *data, uint16_t length, bt_gatt_rsp_func_t func)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_write_req *req;
|
||
|
||
if (!conn || !handle || !func) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
/* Use Prepare Write if offset is set or Long Write is required */
|
||
if (offset || length > (bt_att_get_mtu(conn) - sizeof(*req) - 1)) {
|
||
return gatt_prepare_write(conn, handle, offset, data, length,
|
||
func);
|
||
}
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_WRITE_REQ,
|
||
sizeof(*req) + length);
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->handle = sys_cpu_to_le16(handle);
|
||
memcpy(req->value, data, length);
|
||
net_buf_add(buf, length);
|
||
|
||
BT_DBG("handle 0x%04x length %u", handle, length);
|
||
|
||
return gatt_send(conn, buf, att_write_rsp, func, NULL);
|
||
}
|
||
|
||
static void gatt_subscription_add(struct bt_conn *conn,
|
||
struct bt_gatt_subscribe_params *params)
|
||
{
|
||
bt_addr_le_copy(¶ms->_peer, &conn->le.dst);
|
||
|
||
/* Prepend subscription */
|
||
params->_next = subscriptions;
|
||
subscriptions = params;
|
||
}
|
||
|
||
static void att_write_ccc_rsp(struct bt_conn *conn, uint8_t err,
|
||
const void *pdu, uint16_t length, void *user_data)
|
||
{
|
||
struct bt_gatt_subscribe_params *params = user_data;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
params->func(conn, err, NULL, 0);
|
||
|
||
if (err) {
|
||
if (params->destroy)
|
||
params->destroy(params);
|
||
return;
|
||
}
|
||
|
||
gatt_subscription_add(conn, params);
|
||
}
|
||
|
||
static int gatt_write_ccc(struct bt_conn *conn, uint16_t handle, uint16_t value,
|
||
bt_att_func_t func,
|
||
struct bt_gatt_subscribe_params *params)
|
||
{
|
||
struct net_buf *buf;
|
||
struct bt_att_write_req *req;
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_WRITE_REQ,
|
||
sizeof(*req) + sizeof(uint16_t));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
req = net_buf_add(buf, sizeof(*req));
|
||
req->handle = sys_cpu_to_le16(handle);
|
||
net_buf_add_le16(buf, value);
|
||
|
||
BT_DBG("handle 0x%04x value 0x%04x", handle, value);
|
||
|
||
return gatt_send(conn, buf, func, params, NULL);
|
||
}
|
||
|
||
int bt_gatt_subscribe(struct bt_conn *conn,
|
||
struct bt_gatt_subscribe_params *params)
|
||
{
|
||
struct bt_gatt_subscribe_params *tmp;
|
||
bool has_subscription = false;
|
||
|
||
if (!conn || conn->state != BT_CONN_CONNECTED) {
|
||
return -ENOTCONN;
|
||
}
|
||
|
||
if (!params || !params->func || !params->value || !params->ccc_handle) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
/* Lookup existing subscriptions */
|
||
for (tmp = subscriptions; tmp; tmp = tmp->_next) {
|
||
/* Fail if entry already exists */
|
||
if (tmp == params) {
|
||
return -EALREADY;
|
||
}
|
||
|
||
/* Check if another subscription exists */
|
||
if (!bt_addr_le_cmp(&tmp->_peer, &conn->le.dst) &&
|
||
tmp->value_handle == params->value_handle &&
|
||
tmp->value >= params->value) {
|
||
has_subscription = true;
|
||
}
|
||
}
|
||
|
||
/* Skip write if already subcribed */
|
||
if (has_subscription) {
|
||
gatt_subscription_add(conn, params);
|
||
return 0;
|
||
}
|
||
|
||
return gatt_write_ccc(conn, params->ccc_handle, params->value,
|
||
att_write_ccc_rsp, params);
|
||
}
|
||
|
||
int bt_gatt_unsubscribe(struct bt_conn *conn,
|
||
struct bt_gatt_subscribe_params *params)
|
||
{
|
||
struct bt_gatt_subscribe_params *tmp;
|
||
bool has_subscription = false, found = false;
|
||
|
||
if (!conn || conn->state != BT_CONN_CONNECTED) {
|
||
return -ENOTCONN;
|
||
}
|
||
|
||
if (!params) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
/* Check head */
|
||
if (subscriptions == params) {
|
||
subscriptions = params->_next;
|
||
found = true;
|
||
}
|
||
|
||
/* Lookup existing subscriptions */
|
||
for (tmp = subscriptions; tmp; tmp = tmp->_next) {
|
||
/* Remove subscription */
|
||
if (tmp->_next == params) {
|
||
tmp->_next = params->_next;
|
||
found = true;
|
||
}
|
||
|
||
/* Check if there still remains any other subscription */
|
||
if (!bt_addr_le_cmp(&tmp->_peer, &conn->le.dst) &&
|
||
tmp->value_handle == params->value_handle) {
|
||
has_subscription = true;
|
||
}
|
||
}
|
||
|
||
if (!found) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
if (params->destroy) {
|
||
params->destroy(params);
|
||
}
|
||
|
||
if (has_subscription) {
|
||
return 0;
|
||
}
|
||
|
||
return gatt_write_ccc(conn, params->ccc_handle, 0x0000, NULL, NULL);
|
||
}
|
||
|
||
void bt_gatt_cancel(struct bt_conn *conn)
|
||
{
|
||
bt_att_cancel(conn);
|
||
}
|
||
|
||
static void att_read_multiple_rsp(struct bt_conn *conn, uint8_t err,
|
||
const void *pdu, uint16_t length,
|
||
void *user_data)
|
||
{
|
||
bt_gatt_read_func_t func = user_data;
|
||
|
||
BT_DBG("err 0x%02x", err);
|
||
|
||
if (err) {
|
||
func(conn, err, NULL, 0);
|
||
return;
|
||
}
|
||
|
||
func(conn, 0, pdu, length);
|
||
}
|
||
|
||
int bt_gatt_read_multiple(struct bt_conn *conn, const uint16_t *handles,
|
||
size_t count, bt_gatt_read_func_t func)
|
||
{
|
||
struct net_buf *buf;
|
||
uint8_t i;
|
||
|
||
if (!conn || conn->state != BT_CONN_CONNECTED) {
|
||
return -ENOTCONN;
|
||
}
|
||
|
||
if (!handles || count < 2 || !func) {
|
||
return -EINVAL;
|
||
}
|
||
|
||
buf = bt_att_create_pdu(conn, BT_ATT_OP_READ_MULT_REQ,
|
||
count * sizeof(*handles));
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
for (i = 0; i < count; i++) {
|
||
net_buf_add_le16(buf, handles[i]);
|
||
}
|
||
|
||
return gatt_send(conn, buf, att_read_multiple_rsp, func, NULL);
|
||
}
|
||
#endif /* CONFIG_BLUETOOTH_GATT_CLIENT */
|
||
|
||
void bt_gatt_disconnected(struct bt_conn *conn)
|
||
{
|
||
BT_DBG("conn %p", conn);
|
||
bt_gatt_foreach_attr(0x0001, 0xffff, disconnected_cb, conn);
|
||
|
||
#if defined(CONFIG_BLUETOOTH_GATT_CLIENT)
|
||
/* If paired don't remove subscriptions */
|
||
if (bt_keys_find_addr(&conn->le.dst)) {
|
||
return;
|
||
}
|
||
|
||
remove_subscribtions(conn);
|
||
#endif /* CONFIG_BLUETOOTH_GATT_CLIENT */
|
||
}
|