Varun Bahl
Encryp_u
Dependencies: BLE_API_Encryp CyaSSL-Encryp eMPL_MPU6050 mbed
Fork of
Encryptulator2
by 
Mobius IoT
Diff: nRF51822/nRF51GattServer.cpp
- Revision:
- 1:fc2f9d636751
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/nRF51822/nRF51GattServer.cpp Wed Apr 22 07:47:17 2015 +0000
@@ -0,0 +1,400 @@
+/* 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(GattAttribute::Handle_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(GattAttribute::Handle_t charHandle, const 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 = const_cast<uint8_t *>(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; i<characteristicCount; i++) {
+ if ((p_characteristics[i]->getProperties() & (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 < characteristicCount; i++) {
+ if (nrfCharacteristicHandles[i].value_handle == handle_value) {
+ switch (eventType) {
+ case GattServerEvents::GATT_EVENT_DATA_WRITTEN: {
+ GattCharacteristicWriteCBParams cbParams = {
+ .charHandle = i,
+ .op = static_cast<GattCharacteristicWriteCBParams::Type>(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)
+ }
+ }
+ };
+ sd_ble_gatts_rw_authorize_reply(gattsEventP->conn_handle, &reply);
+
+ /*
+ * If write-authorization is enabled for a characteristic,
+ * AUTHORIZATION_REQ event (if replied with true) is *not*
+ * followed by another DATA_WRITTEN event; so we still need
+ * to invoke handleDataWritten(), much the same as we would
+ * have done if write-authorization had not been enabled.
+ */
+ if (reply.params.write.gatt_status == BLE_GATT_STATUS_SUCCESS) {
+ GattCharacteristicWriteCBParams cbParams = {
+ .charHandle = i,
+ .op = static_cast<GattCharacteristicWriteCBParams::Type>(gattsEventP->params.authorize_request.request.write.op),
+ .offset = gattsEventP->params.authorize_request.request.write.offset,
+ .len = gattsEventP->params.authorize_request.request.write.len,
+ .data = gattsEventP->params.authorize_request.request.write.data,
+ };
+ handleDataWrittenEvent(&cbParams);
+ }
+ break;
+ }
+ case GattServerEvents::GATT_EVENT_READ_AUTHORIZATION_REQ: {
+ GattCharacteristicReadAuthCBParams cbParams = {
+ .charHandle = i,
+ .offset = gattsEventP->params.authorize_request.request.read.offset,
+ .len = 0,
+ .data = NULL
+ };
+
+ ble_gatts_rw_authorize_reply_params_t reply = {
+ .type = BLE_GATTS_AUTHORIZE_TYPE_READ,
+ .params = {
+ .read = {
+ .gatt_status = p_characteristics[i]->authorizeRead(&cbParams)
+ }
+ }
+ };
+
+ if (cbParams.authorizationReply == 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;
+ }
+ }
+
+ 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;
+}
\ No newline at end of file