| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <assert.h> |
| #include <string.h> |
| #include "sysinit/sysinit.h" |
| #include "host/ble_hs.h" |
| #include "services/ias/ble_svc_ias.h" |
| |
| /* Callback function */ |
| static ble_svc_ias_event_fn *ble_svc_ias_cb_fn; |
| |
| /* Alert level */ |
| static uint8_t ble_svc_ias_alert_level; |
| |
| /* Write characteristic function */ |
| static int |
| ble_svc_ias_chr_write(struct os_mbuf *om, uint16_t min_len, |
| uint16_t max_len, void *dst, |
| uint16_t *len); |
| |
| /* Access function */ |
| static int |
| ble_svc_ias_access(uint16_t conn_handle, uint16_t attr_handle, |
| struct ble_gatt_access_ctxt *ctxt, void *arg); |
| |
| static const struct ble_gatt_svc_def ble_svc_ias_defs[] = { |
| { |
| /*** Service: Immediate Alert Service (IAS). */ |
| .type = BLE_GATT_SVC_TYPE_PRIMARY, |
| .uuid = BLE_UUID16_DECLARE(BLE_SVC_IAS_UUID16), |
| .characteristics = (struct ble_gatt_chr_def[]) { { |
| /*** Characteristic: Alert Level. */ |
| .uuid = BLE_UUID16_DECLARE(BLE_SVC_IAS_CHR_UUID16_ALERT_LEVEL), |
| .access_cb = ble_svc_ias_access, |
| .flags = BLE_GATT_CHR_F_WRITE_NO_RSP, |
| }, { |
| 0, /* No more characteristics in this service. */ |
| } }, |
| }, |
| |
| { |
| 0, /* No more services. */ |
| }, |
| }; |
| |
| /** |
| * Writes the received value from a characteristic write to |
| * the given destination. |
| */ |
| static int |
| ble_svc_ias_chr_write(struct os_mbuf *om, uint16_t min_len, |
| uint16_t max_len, void *dst, |
| uint16_t *len) |
| { |
| uint16_t om_len; |
| int rc; |
| |
| om_len = OS_MBUF_PKTLEN(om); |
| if (om_len < min_len || om_len > max_len) { |
| return BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN; |
| } |
| |
| rc = ble_hs_mbuf_to_flat(om, dst, max_len, len); |
| if (rc != 0) { |
| return BLE_ATT_ERR_UNLIKELY; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Simple write access callback for the alert level |
| * characteristic. |
| */ |
| static int |
| ble_svc_ias_access(uint16_t conn_handle, uint16_t attr_handle, |
| struct ble_gatt_access_ctxt *ctxt, void *arg) |
| { |
| int rc; |
| |
| assert(ctxt->chr == &ble_svc_ias_defs[0].characteristics[0]); |
| |
| switch (ctxt->op) { |
| case BLE_GATT_ACCESS_OP_WRITE_CHR: |
| rc = ble_svc_ias_chr_write(ctxt->om, |
| sizeof ble_svc_ias_alert_level, |
| sizeof ble_svc_ias_alert_level, |
| &ble_svc_ias_alert_level, NULL); |
| /* Call the IAS event function */ |
| if (ble_svc_ias_cb_fn) { |
| ble_svc_ias_cb_fn(ble_svc_ias_alert_level); |
| } |
| return rc; |
| |
| default: |
| assert(0); |
| return BLE_ATT_ERR_UNLIKELY; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Designates the specified function as the IAS callback. This callback is |
| * necessary for this service to function properly. |
| * |
| * @param cb The callback function to call when |
| * the client signals an alert. |
| */ |
| void |
| ble_svc_ias_set_cb(ble_svc_ias_event_fn *cb) |
| { |
| ble_svc_ias_cb_fn = cb; |
| } |
| |
| /** |
| * Initialize the IAS package. |
| */ |
| void |
| ble_svc_ias_init(void) |
| { |
| int rc; |
| |
| /* Ensure this function only gets called by sysinit. */ |
| SYSINIT_ASSERT_ACTIVE(); |
| |
| rc = ble_gatts_count_cfg(ble_svc_ias_defs); |
| SYSINIT_PANIC_ASSERT(rc == 0); |
| |
| rc = ble_gatts_add_svcs(ble_svc_ias_defs); |
| SYSINIT_PANIC_ASSERT(rc == 0); |
| } |