/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed 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 "nRF51GattServer.h" #include "mbed.h" #include "common/common.h" #include "btle/custom/custom_helper.h" #include "nRF51Gap.h" /**************************************************************************/ /*! @brief Adds a new service to the GATT table on the peripheral @returns ble_error_t @retval BLE_ERROR_NONE Everything executed properly @section EXAMPLE @code @endcode */ /**************************************************************************/ ble_error_t nRF51GattServer::addService(GattService &service) { /* ToDo: Make sure we don't overflow the array, etc. */ /* ToDo: Make sure this service UUID doesn't already exist (?) */ /* ToDo: Basic validation */ /* Add the service to the nRF51 */ ble_uuid_t nordicUUID; nordicUUID = custom_convert_to_nordic_uuid(service.getUUID()); uint16_t serviceHandle; ASSERT( ERROR_NONE == sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &nordicUUID, &serviceHandle), BLE_ERROR_PARAM_OUT_OF_RANGE ); service.setHandle(serviceHandle); /* Add characteristics to the service */ for (uint8_t i = 0; i < service.getCharacteristicCount(); i++) { GattCharacteristic *p_char = service.getCharacteristic(i); /* Skip any incompletely defined, read-only characteristics. */ if ((p_char->getValueAttribute().getValuePtr() == NULL) && (p_char->getValueAttribute().getInitialLength() == 0) && (p_char->getProperties() == GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ)) { continue; } nordicUUID = custom_convert_to_nordic_uuid(p_char->getValueAttribute().getUUID()); ASSERT ( ERROR_NONE == custom_add_in_characteristic(BLE_GATT_HANDLE_INVALID, &nordicUUID, p_char->getProperties(), p_char->getValueAttribute().getValuePtr(), p_char->getValueAttribute().getInitialLength(), p_char->getValueAttribute().getMaxLength(), p_char->isReadAuthorizationEnabled(), p_char->isWriteAuthorizationEnabled(), &nrfCharacteristicHandles[characteristicCount]), BLE_ERROR_PARAM_OUT_OF_RANGE ); /* Update the characteristic handle */ uint16_t charHandle = characteristicCount; p_characteristics[characteristicCount++] = p_char; p_char->getValueAttribute().setHandle(charHandle); /* Add optional descriptors if any */ /* ToDo: Make sure we don't overflow the array */ for (uint8_t j = 0; j < p_char->getDescriptorCount(); j++) { GattAttribute *p_desc = p_char->getDescriptor(j); nordicUUID = custom_convert_to_nordic_uuid(p_desc->getUUID()); ASSERT ( ERROR_NONE == custom_add_in_descriptor(BLE_GATT_HANDLE_INVALID, &nordicUUID, p_desc->getValuePtr(), p_desc->getInitialLength(), p_desc->getMaxLength(), &nrfDescriptorHandles[descriptorCount]), BLE_ERROR_PARAM_OUT_OF_RANGE ); uint16_t descHandle = descriptorCount; p_descriptors[descriptorCount++] = p_desc; p_desc->setHandle(descHandle); } } serviceCount++; return BLE_ERROR_NONE; } /**************************************************************************/ /*! @brief Reads the value of a characteristic, based on the service and characteristic index fields @param[in] charHandle The handle of the GattCharacteristic to read from @param[in] buffer Buffer to hold the the characteristic's value (raw byte array in LSB format) @param[in] len The number of bytes read into the buffer @returns ble_error_t @retval BLE_ERROR_NONE Everything executed properly @section EXAMPLE @code @endcode */ /**************************************************************************/ ble_error_t nRF51GattServer::readValue(uint16_t charHandle, uint8_t buffer[], uint16_t *const lengthP) { ASSERT( ERROR_NONE == sd_ble_gatts_value_get(nrfCharacteristicHandles[charHandle].value_handle, 0, lengthP, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE); return BLE_ERROR_NONE; } /**************************************************************************/ /*! @brief Updates the value of a characteristic, based on the service and characteristic index fields @param[in] charHandle The handle of the GattCharacteristic to write to @param[in] buffer Data to use when updating the characteristic's value (raw byte array in LSB format) @param[in] len The number of bytes in buffer @returns ble_error_t @retval BLE_ERROR_NONE Everything executed properly @section EXAMPLE @code @endcode */ /**************************************************************************/ ble_error_t nRF51GattServer::updateValue(uint16_t charHandle, uint8_t buffer[], uint16_t len, bool localOnly) { uint16_t gapConnectionHandle = nRF51Gap::getInstance().getConnectionHandle(); ble_error_t returnValue = BLE_ERROR_NONE; if (localOnly) { /* Only update locally regardless of notify/indicate */ ASSERT_INT( ERROR_NONE, sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle].value_handle, 0, &len, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE ); return BLE_ERROR_NONE; } if ((p_characteristics[charHandle]->getProperties() & (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)) && (gapConnectionHandle != BLE_CONN_HANDLE_INVALID)) { /* HVX update for the characteristic value */ ble_gatts_hvx_params_t hvx_params; hvx_params.handle = nrfCharacteristicHandles[charHandle].value_handle; hvx_params.type = (p_characteristics[charHandle]->getProperties() & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) ? BLE_GATT_HVX_NOTIFICATION : BLE_GATT_HVX_INDICATION; hvx_params.offset = 0; hvx_params.p_data = buffer; hvx_params.p_len = &len; error_t error = (error_t) sd_ble_gatts_hvx(gapConnectionHandle, &hvx_params); /* ERROR_INVALID_STATE, ERROR_BUSY, ERROR_GATTS_SYS_ATTR_MISSING and *ERROR_NO_TX_BUFFERS the ATT table has been updated. */ if ((error != ERROR_NONE) && (error != ERROR_INVALID_STATE) && (error != ERROR_BLE_NO_TX_BUFFERS) && (error != ERROR_BUSY) && (error != ERROR_BLEGATTS_SYS_ATTR_MISSING)) { ASSERT_INT( ERROR_NONE, sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle].value_handle, 0, &len, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE ); } /* Notifications consume application buffers. The return value can be used for resending notifications. */ if (error != ERROR_NONE) { returnValue = BLE_STACK_BUSY; } } else { ASSERT_INT( ERROR_NONE, sd_ble_gatts_value_set(nrfCharacteristicHandles[charHandle].value_handle, 0, &len, buffer), BLE_ERROR_PARAM_OUT_OF_RANGE ); } return returnValue; } /**************************************************************************/ /*! @brief Callback handler for events getting pushed up from the SD */ /**************************************************************************/ void nRF51GattServer::hwCallback(ble_evt_t *p_ble_evt) { uint16_t handle_value; GattServerEvents::gattEvent_t eventType; const ble_gatts_evt_t *gattsEventP = &p_ble_evt->evt.gatts_evt; switch (p_ble_evt->header.evt_id) { case BLE_GATTS_EVT_WRITE: /* There are 2 use case here: Values being updated & CCCD (indicate/notify) enabled */ /* 1.) Handle CCCD changes */ handle_value = gattsEventP->params.write.handle; for (uint8_t i = 0; igetProperties() & (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)) && (nrfCharacteristicHandles[i].cccd_handle == handle_value)) { uint16_t cccd_value = (gattsEventP->params.write.data[1] << 8) | gattsEventP->params.write.data[0]; /* Little Endian but M0 may be mis-aligned */ if (((p_characteristics[i]->getProperties() & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE) && (cccd_value & BLE_GATT_HVX_INDICATION)) || ((p_characteristics[i]->getProperties() & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) && (cccd_value & BLE_GATT_HVX_NOTIFICATION))) { eventType = GattServerEvents::GATT_EVENT_UPDATES_ENABLED; } else { eventType = GattServerEvents::GATT_EVENT_UPDATES_DISABLED; } handleEvent(eventType, i); return; } } /* 2.) Changes to the characteristic value will be handled with other events below */ eventType = GattServerEvents::GATT_EVENT_DATA_WRITTEN; break; case BLE_GATTS_EVT_HVC: /* Indication confirmation received */ eventType = GattServerEvents::GATT_EVENT_CONFIRMATION_RECEIVED; handle_value = gattsEventP->params.hvc.handle; break; case BLE_EVT_TX_COMPLETE: { handleDataSentEvent(p_ble_evt->evt.common_evt.params.tx_complete.count); return; } case BLE_GATTS_EVT_SYS_ATTR_MISSING: sd_ble_gatts_sys_attr_set(gattsEventP->conn_handle, NULL, 0); return; case BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST: switch (gattsEventP->params.authorize_request.type) { case BLE_GATTS_AUTHORIZE_TYPE_READ: eventType = GattServerEvents::GATT_EVENT_READ_AUTHORIZATION_REQ; handle_value = gattsEventP->params.authorize_request.request.read.handle; break; case BLE_GATTS_AUTHORIZE_TYPE_WRITE: eventType = GattServerEvents::GATT_EVENT_WRITE_AUTHORIZATION_REQ; handle_value = gattsEventP->params.authorize_request.request.write.handle; break; default: return; } break; default: return; } /* Find index (charHandle) in the pool */ for (uint8_t i = 0; i(gattsEventP->params.write.op), .offset = gattsEventP->params.write.offset, .len = gattsEventP->params.write.len, .data = gattsEventP->params.write.data }; handleDataWrittenEvent(&cbParams); break; } case GattServerEvents::GATT_EVENT_WRITE_AUTHORIZATION_REQ: { GattCharacteristicWriteAuthCBParams cbParams = { .charHandle = i, .offset = gattsEventP->params.authorize_request.request.write.offset, .len = gattsEventP->params.authorize_request.request.write.len, .data = gattsEventP->params.authorize_request.request.write.data, }; ble_gatts_rw_authorize_reply_params_t reply = { .type = BLE_GATTS_AUTHORIZE_TYPE_WRITE, .params = { .write = { .gatt_status = (p_characteristics[i]->authorizeWrite(&cbParams) ? BLE_GATT_STATUS_SUCCESS : BLE_GATT_STATUS_ATTERR_WRITE_NOT_PERMITTED) } } }; sd_ble_gatts_rw_authorize_reply(gattsEventP->conn_handle, &reply); break; } case GattServerEvents::GATT_EVENT_READ_AUTHORIZATION_REQ: { GattCharacteristicReadAuthCBParams cbParams = { .charHandle = i, .offset = gattsEventP->params.authorize_request.request.read.offset, .len = 0, .data = NULL }; /* Ask for authorization and, potentially, new data. Use updated parameters to construct reply. */ p_characteristics[i]->authorizeRead(&cbParams); ble_gatts_rw_authorize_reply_params_t reply = { .type = BLE_GATTS_AUTHORIZE_TYPE_READ }; if (cbParams.authorizationReply == true) { reply.params.read.gatt_status = BLE_GATT_STATUS_SUCCESS; if (cbParams.data != NULL) { reply.params.read.update = 1; reply.params.read.offset = cbParams.offset; reply.params.read.len = cbParams.len; reply.params.read.p_data = cbParams.data; } } else { reply.params.read.gatt_status = BLE_GATT_STATUS_ATTERR_READ_NOT_PERMITTED; } sd_ble_gatts_rw_authorize_reply(gattsEventP->conn_handle, &reply); break; } default: handleEvent(eventType, i); break; } } } } ble_error_t nRF51GattServer::initializeGATTDatabase(void) { /* Empty. Services are populated in the GattDatabase through addService(). */ return BLE_ERROR_NONE; }