/* * Copyright (C) 2011-2014 by BlueKitchen GmbH * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. This software may not be used in a commercial product * without an explicit license granted by the copyright holder. * * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include #include #include #include #include #include #include #include #include "btstack-config.h" #include "gatt_client.h" #include "ad_parser.h" #include "debug.h" #include "btstack_memory.h" #include "hci.h" #include "hci_dump.h" #include "l2cap.h" #include "att.h" #include "att_dispatch.h" #ifdef HAVE_UART_CC2564 #include "bt_control_cc256x.h" #endif static linked_list_t gatt_client_connections = NULL; static uint16_t att_client_start_handle = 0x0001; static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); void (*gatt_client_callback)(le_event_t * event); void gatt_client_init(){ att_client_start_handle = 0x0000; gatt_client_connections = NULL; //l2cap_register_fixed_channel(gatt_client_att_packet_handler, L2CAP_CID_ATTRIBUTE_PROTOCOL); att_dispatch_register_client(gatt_client_att_packet_handler); } static void dummy_notify(le_event_t* event){} void gatt_client_register_handler(void (*gatt_callback)(le_event_t* event)){ if (gatt_callback == NULL){ gatt_callback = &dummy_notify; } gatt_client_callback = gatt_callback; } // gatt client API // start/stop gatt client void gatt_client_start(gatt_client_t *context, uint16_t handle){ memset(context, 0, sizeof(gatt_client_t)); context->handle = handle; context->mtu_state = SEND_MTU_EXCHANGE; context->gatt_client_state = P_READY; linked_list_add(&gatt_client_connections, (linked_item_t*)context); } void gatt_client_stop(gatt_client_t *context){ linked_list_remove(&gatt_client_connections, (linked_item_t*) context); } int gatt_client_is_ready(gatt_client_t *context){ return context->gatt_client_state == P_READY; } // START Helper Functions - to be sorted static uint16_t l2cap_max_mtu_for_handle(uint16_t handle){ return l2cap_max_mtu(); } // END Helper Functions // precondition: can_send_packet_now == TRUE static void att_confirmation(uint16_t peripheral_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = ATT_HANDLE_VALUE_CONFIRMATION; l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); } // precondition: can_send_packet_now == TRUE static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; bt_store_16(request, 1, start_handle); bt_store_16(request, 3, end_handle); l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); } // precondition: can_send_packet_now == TRUE static void att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; bt_store_16(request, 1, start_handle); bt_store_16(request, 3, end_handle); bt_store_16(request, 5, attribute_group_type); memcpy(&request[7], value, value_size); l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); } // precondition: can_send_packet_now == TRUE static void att_read_by_type_or_group_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; bt_store_16(request, 1, start_handle); bt_store_16(request, 3, end_handle); bt_store_16(request, 5, attribute_group_type); l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); } // precondition: can_send_packet_now == TRUE static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; bt_store_16(request, 1, attribute_handle); l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); } // precondition: can_send_packet_now == TRUE static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; bt_store_16(request, 1, attribute_handle); bt_store_16(request, 3, value_offset); l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); } // precondition: can_send_packet_now == TRUE static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; bt_store_16(request, 1, attribute_handle); memcpy(&request[3], value, value_length); l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); } // precondition: can_send_packet_now == TRUE static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; request[1] = execute_write; l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); } // precondition: can_send_packet_now == TRUE static void att_prepare_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; bt_store_16(request, 1, attribute_handle); bt_store_16(request, 3, value_offset); memcpy(&request[5], &value[value_offset], blob_length); l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); } static uint16_t write_blob_length(gatt_client_t * peripheral){ uint16_t max_blob_length = peripheral->mtu - 5; if (peripheral->attribute_offset >= peripheral->attribute_length) { return 0; } uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; if (max_blob_length > rest_length){ return rest_length; } return max_blob_length; } static void send_gatt_services_request(gatt_client_t *peripheral){ return att_read_by_type_or_group_request(ATT_READ_BY_GROUP_TYPE_REQUEST, GATT_PRIMARY_SERVICE_UUID, peripheral->handle, peripheral->start_group_handle, peripheral->end_group_handle); } static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ if (peripheral->uuid16){ uint8_t uuid16[2]; bt_store_16(uuid16, 0, peripheral->uuid16); return att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid16, 2); } uint8_t uuid128[16]; swap128(peripheral->uuid128, uuid128); return att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid128, 16); } static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); } static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ att_read_request(ATT_READ_REQUEST, peripheral->handle, peripheral->query_start_handle); } static void send_gatt_included_service_request(gatt_client_t *peripheral){ att_read_by_type_or_group_request(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, peripheral->handle, peripheral->start_group_handle, peripheral->end_group_handle); } static void send_gatt_characteristic_request(gatt_client_t *peripheral){ att_read_by_type_or_group_request(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, peripheral->handle, peripheral->start_group_handle, peripheral->end_group_handle); } static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->handle, peripheral->start_group_handle, peripheral->end_group_handle); } static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ att_read_request(ATT_READ_REQUEST, peripheral->handle, peripheral->attribute_handle); } static void send_gatt_read_blob_request(gatt_client_t *peripheral){ att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->handle, peripheral->attribute_handle, peripheral->attribute_offset); } static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ att_write_request(ATT_WRITE_REQUEST, peripheral->handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); } static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ att_write_request(ATT_WRITE_REQUEST, peripheral->handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); } static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); } static void send_gatt_execute_write_request(gatt_client_t * peripheral){ att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->handle, 1); } static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->handle, 0); } static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ att_read_by_type_or_group_request(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, peripheral->handle, peripheral->start_group_handle, peripheral->end_group_handle); } static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ att_read_request(ATT_READ_REQUEST, peripheral->handle, peripheral->attribute_handle); } static uint16_t get_last_result_handle(uint8_t * packet, uint16_t size){ uint8_t attr_length = packet[1]; uint8_t handle_offset = 0; switch (packet[0]){ case ATT_READ_BY_TYPE_RESPONSE: handle_offset = 3; break; case ATT_READ_BY_GROUP_TYPE_RESPONSE: handle_offset = 2; break; } return READ_BT_16(packet, size - attr_length + handle_offset); } static inline void send_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ gatt_complete_event_t event; event.type = GATT_QUERY_COMPLETE; event.client = peripheral; event.status = status; (*gatt_client_callback)((le_event_t*)&event); } static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ uint8_t attr_length = packet[1]; uint8_t uuid_length = attr_length - 4; le_service_t service; le_service_event_t event; event.type = GATT_SERVICE_QUERY_RESULT; event.client = peripheral; int i; for (i = 2; i < size; i += attr_length){ service.start_group_handle = READ_BT_16(packet,i); service.end_group_handle = READ_BT_16(packet,i+2); if (uuid_length == 2){ service.uuid16 = READ_BT_16(packet, i+4); sdp_normalize_uuid((uint8_t*) &service.uuid128, service.uuid16); } else { swap128(&packet[i+4], service.uuid128); } event.service = service; // printf(" report_gatt_services 0x%02x : 0x%02x-0x%02x\n", service.uuid16, service.start_group_handle, service.end_group_handle); (*gatt_client_callback)((le_event_t*)&event); } // printf("report_gatt_services for %02X done\n", peripheral->handle); } // helper static void characteristic_start_found(gatt_client_t * peripheral, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ uint8_t uuid128[16]; uint16_t uuid16; if (uuid_length == 2){ uuid16 = READ_BT_16(uuid, 0); sdp_normalize_uuid((uint8_t*) uuid128, uuid16); } else { swap128(uuid, uuid128); } if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; peripheral->characteristic_properties = properties; peripheral->characteristic_start_handle = start_handle; peripheral->attribute_handle = value_handle; if (peripheral->filter_with_uuid) return; peripheral->uuid16 = uuid16; memcpy(peripheral->uuid128, uuid128, 16); } static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ // TODO: stop searching if filter and uuid found if (!peripheral->characteristic_start_handle) return; le_characteristic_event_t event; event.type = GATT_CHARACTERISTIC_QUERY_RESULT; event.client = peripheral; event.characteristic.start_handle = peripheral->characteristic_start_handle; event.characteristic.value_handle = peripheral->attribute_handle; event.characteristic.end_handle = end_handle; event.characteristic.properties = peripheral->characteristic_properties; event.characteristic.uuid16 = peripheral->uuid16; memcpy(event.characteristic.uuid128, peripheral->uuid128, 16); (*gatt_client_callback)((le_event_t*)&event); peripheral->characteristic_start_handle = 0; } static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ uint8_t attr_length = packet[1]; uint8_t uuid_length = attr_length - 5; int i; for (i = 2; i < size; i += attr_length){ uint16_t start_handle = READ_BT_16(packet, i); uint8_t properties = packet[i+2]; uint16_t value_handle = READ_BT_16(packet, i+3); characteristic_end_found(peripheral, start_handle-1); characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); } } static void report_gatt_included_service(gatt_client_t * peripheral, uint8_t *uuid128, uint16_t uuid16){ le_service_t service; service.uuid16 = uuid16; if (service.uuid16){ sdp_normalize_uuid((uint8_t*) &service.uuid128, service.uuid16); } if (uuid128){ memcpy(service.uuid128, uuid128, 16); } service.start_group_handle = peripheral->query_start_handle; service.end_group_handle = peripheral->query_end_handle; le_service_event_t event; event.type = GATT_INCLUDED_SERVICE_QUERY_RESULT; event.service = service; event.client = peripheral; (*gatt_client_callback)((le_event_t*)&event); } static void send_characteristic_value_event(gatt_client_t * peripheral, uint16_t handle, uint8_t * value, uint16_t length, uint16_t offset, uint8_t event_type){ le_characteristic_value_event_t event; event.type = event_type; event.client = peripheral; event.value_handle = handle; event.value_offset = offset; event.blob_length = length; event.blob = value; (*gatt_client_callback)((le_event_t*)&event); } static void report_gatt_long_characteristic_value_blob(gatt_client_t * peripheral, uint8_t * value, uint16_t blob_length, int value_offset){ send_characteristic_value_event(peripheral, peripheral->attribute_handle, value, blob_length, value_offset, GATT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT); } static void report_gatt_notification(gatt_client_t * peripheral, uint16_t handle, uint8_t * value, int length){ send_characteristic_value_event(peripheral, handle, value, length, 0, GATT_NOTIFICATION); } static void report_gatt_indication(gatt_client_t * peripheral, uint16_t handle, uint8_t * value, int length){ send_characteristic_value_event(peripheral, handle, value, length, 0, GATT_INDICATION); } static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t handle, uint8_t * value, int length){ send_characteristic_value_event(peripheral, handle, value, length, 0, GATT_CHARACTERISTIC_VALUE_QUERY_RESULT); } static void report_gatt_characteristic_descriptor(gatt_client_t * peripheral, uint16_t handle, uint8_t *value, uint16_t value_length, uint16_t value_offset, uint8_t event_type){ le_characteristic_descriptor_event_t event; event.type = event_type; event.client = peripheral; le_characteristic_descriptor_t descriptor; descriptor.handle = handle; descriptor.uuid16 = peripheral->uuid16; event.value_offset = value_offset; if (peripheral->uuid128){ memcpy(descriptor.uuid128, peripheral->uuid128, 16); } event.value = value; event.value_length = value_length; event.characteristic_descriptor = descriptor; (*gatt_client_callback)((le_event_t*)&event); } static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ le_characteristic_descriptor_t descriptor; le_characteristic_descriptor_event_t event; event.type = GATT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; event.client = peripheral; int i; for (i = 0; iend_group_handle){ peripheral->start_group_handle = last_result_handle + 1; peripheral->gatt_client_state = next_query_state; return; } // DONE peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 0); } static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); } static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); } static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); } static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); } static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); } static inline void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ peripheral->attribute_offset += write_blob_length(peripheral); uint16_t next_blob_length = write_blob_length(peripheral); if (next_blob_length == 0){ peripheral->gatt_client_state = done_state; return; } peripheral->gatt_client_state = next_query_state; } static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ uint16_t max_blob_length = peripheral->mtu - 1; if (received_blob_length < max_blob_length){ peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 0); return; } peripheral->attribute_offset += received_blob_length; peripheral->gatt_client_state = next_query_state; } static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ uint16_t attribute_handle = READ_BT_16(packet, 1); uint16_t value_offset = READ_BT_16(packet, 3); if (peripheral->attribute_handle != attribute_handle) return 0; if (peripheral->attribute_offset != value_offset) return 0; return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; } gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ linked_item_t *it; for (it = (linked_item_t *) gatt_client_connections; it ; it = it->next){ gatt_client_t * peripheral = (gatt_client_t *) it; if (peripheral->handle == handle){ return peripheral; } } return NULL; } static void gatt_client_run(){ if (!hci_can_send_packet_now_using_packet_buffer(HCI_COMMAND_DATA_PACKET)) return; // printf("handle_peripheral_list 4\n"); if (!l2cap_can_send_connectionless_packet_now()) return; // printf("handle_peripheral_list 5\n"); // printf("handle_peripheral_list empty %u\n", linked_list_empty(&le_connections)); linked_item_t *it; for (it = (linked_item_t *) gatt_client_connections; it ; it = it->next){ gatt_client_t * peripheral = (gatt_client_t *) it; // printf("handle_peripheral_list, status %u\n", peripheral->state); switch (peripheral->mtu_state) { case SEND_MTU_EXCHANGE:{ peripheral->mtu_state = SENT_MTU_EXCHANGE; uint16_t mtu = l2cap_max_mtu_for_handle(peripheral->handle); // TODO: extract as att_exchange_mtu_request l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = ATT_EXCHANGE_MTU_REQUEST; bt_store_16(request, 1, mtu); l2cap_send_prepared_connectionless(peripheral->handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); return; } case SENT_MTU_EXCHANGE: return; default: break; } if (peripheral->send_confirmation){ peripheral->send_confirmation = 0; att_confirmation(peripheral->handle); return; } // check MTU for writes switch (peripheral->gatt_client_state){ case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: if (peripheral->attribute_length < peripheral->mtu - 3) break; peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); return; default: break; } // printf("gatt_client_state %u\n", peripheral->gatt_client_state); switch (peripheral->gatt_client_state){ case P_W2_SEND_SERVICE_QUERY: peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; send_gatt_services_request(peripheral); break; case P_W2_SEND_SERVICE_WITH_UUID_QUERY: peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; send_gatt_services_by_uuid_request(peripheral); break; case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; send_gatt_characteristic_request(peripheral); break; case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; send_gatt_characteristic_request(peripheral); break; case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; send_gatt_characteristic_descriptor_request(peripheral); break; case P_W2_SEND_INCLUDED_SERVICE_QUERY: peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; send_gatt_included_service_request(peripheral); break; case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; send_gatt_included_service_uuid_request(peripheral); break; case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; send_gatt_read_characteristic_value_request(peripheral); break; case P_W2_SEND_READ_BLOB_QUERY: peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; send_gatt_read_blob_request(peripheral); break; case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; send_gatt_write_attribute_value_request(peripheral); break; case P_W2_PREPARE_WRITE: peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; send_gatt_prepare_write_request(peripheral); break; case P_W2_PREPARE_RELIABLE_WRITE: peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; send_gatt_prepare_write_request(peripheral); break; case P_W2_EXECUTE_PREPARED_WRITE: peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; send_gatt_execute_write_request(peripheral); break; case P_W2_CANCEL_PREPARED_WRITE: peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; send_gatt_cancel_prepared_write_request(peripheral); break; case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; send_gatt_read_client_characteristic_configuration_request(peripheral); break; case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_read_characteristic_descriptor_request(peripheral); break; case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_read_blob_request(peripheral); break; case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_write_attribute_value_request(peripheral); break; case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; send_gatt_write_client_characteristic_configuration_request(peripheral); break; case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_prepare_write_request(peripheral); break; case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_execute_write_request(peripheral); break; default: break; } } } static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { if (gatt_client_is_ready(peripheral)) return; send_gatt_complete_event(peripheral, error_code); } void gatt_packet_handler(void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ if (packet_type != HCI_EVENT_PACKET) return; switch (packet[0]) { case HCI_EVENT_DISCONNECTION_COMPLETE: { uint16_t handle = READ_BT_16(packet,3); gatt_client_t * peripheral = get_gatt_client_context_for_handle(handle); if (!peripheral) break; gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); linked_list_remove(&gatt_client_connections, (linked_item_t *) peripheral); break; } default: break; } gatt_client_run(); } static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ if (packet_type != ATT_DATA_PACKET) return; gatt_client_t * peripheral = get_gatt_client_context_for_handle(handle); if (!peripheral) return; switch (packet[0]){ case ATT_EXCHANGE_MTU_RESPONSE: { uint16_t remote_rx_mtu = READ_BT_16(packet, 1); uint16_t local_rx_mtu = l2cap_max_mtu_for_handle(handle); peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; peripheral->mtu_state = MTU_EXCHANGED; break; } case ATT_READ_BY_GROUP_TYPE_RESPONSE: switch(peripheral->gatt_client_state){ case P_W4_SERVICE_QUERY_RESULT: report_gatt_services(peripheral, packet, size); trigger_next_service_query(peripheral, get_last_result_handle(packet, size)); break; default: break; } break; case ATT_HANDLE_VALUE_NOTIFICATION: report_gatt_notification(peripheral, READ_BT_16(packet,1), &packet[3], size-3); break; case ATT_HANDLE_VALUE_INDICATION: report_gatt_indication(peripheral, READ_BT_16(packet,1), &packet[3], size-3); peripheral->send_confirmation = 1; break; case ATT_READ_BY_TYPE_RESPONSE: switch (peripheral->gatt_client_state){ case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: report_gatt_characteristics(peripheral, packet, size); trigger_next_characteristic_query(peripheral, get_last_result_handle(packet, size)); break; case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: report_gatt_characteristics(peripheral, packet, size); trigger_next_characteristic_query(peripheral, get_last_result_handle(packet, size)); break; case P_W4_INCLUDED_SERVICE_QUERY_RESULT: { uint16_t uuid16 = 0; uint16_t pair_size = packet[1]; if (pair_size < 7){ // UUIDs not available, query first included service peripheral->start_group_handle = READ_BT_16(packet, 2); // ready for next query peripheral->query_start_handle = READ_BT_16(packet, 4); peripheral->query_end_handle = READ_BT_16(packet,6); peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; break; } uint16_t offset; for (offset = 2; offset < size; offset += pair_size){ peripheral->query_start_handle = READ_BT_16(packet,offset+2); peripheral->query_end_handle = READ_BT_16(packet,offset+4); uuid16 = READ_BT_16(packet, offset+6); report_gatt_included_service(peripheral, NULL, uuid16); } trigger_next_included_service_query(peripheral, get_last_result_handle(packet, size)); break; } case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: peripheral->client_characteristic_configuration_handle = READ_BT_16(packet, 2); peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; break; default: break; } break; case ATT_READ_RESPONSE: switch (peripheral->gatt_client_state){ case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { uint8_t uuid128[16]; swap128(&packet[1], uuid128); report_gatt_included_service(peripheral, uuid128, 0); trigger_next_included_service_query(peripheral, peripheral->start_group_handle); break; } case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: peripheral->gatt_client_state = P_READY; report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); break; case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ peripheral->gatt_client_state = P_READY; report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0, GATT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT); break; } default: break; } break; case ATT_FIND_BY_TYPE_VALUE_RESPONSE: { uint8_t pair_size = 4; le_service_t service; le_service_event_t event; event.type = GATT_SERVICE_QUERY_RESULT; int i; for (i = 1; iuuid128, 16); service.uuid16 = peripheral->uuid16; event.service = service; (*gatt_client_callback)((le_event_t*)&event); } trigger_next_service_by_uuid_query(peripheral, service.end_group_handle); break; } case ATT_FIND_INFORMATION_REPLY: { uint8_t pair_size = 4; if (packet[1] == 2){ pair_size = 18; } uint16_t last_descriptor_handle = READ_BT_16(packet, size - pair_size); report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); break; } case ATT_WRITE_RESPONSE: switch (peripheral->gatt_client_state){ case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 0); break; case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 0); break; case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 0); break; default: break; } break; case ATT_READ_BLOB_RESPONSE:{ uint16_t received_blob_length = size-1; switch(peripheral->gatt_client_state){ case P_W4_READ_BLOB_RESULT: report_gatt_long_characteristic_value_blob(peripheral, &packet[1], received_blob_length, peripheral->attribute_offset); trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); break; case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset, GATT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT); trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); break; default: break; } break; } case ATT_PREPARE_WRITE_RESPONSE: switch (peripheral->gatt_client_state){ case P_W4_PREPARE_WRITE_RESULT:{ peripheral->attribute_offset = READ_BT_16(packet, 3); trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); break; } case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ peripheral->attribute_offset = READ_BT_16(packet, 3); trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); break; } case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ if (is_value_valid(peripheral, packet, size)){ peripheral->attribute_offset = READ_BT_16(packet, 3); trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); break; } peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; break; } default: break; } break; case ATT_EXECUTE_WRITE_RESPONSE: switch (peripheral->gatt_client_state){ case P_W4_EXECUTE_PREPARED_WRITE_RESULT: peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 0); break; case P_W4_CANCEL_PREPARED_WRITE_RESULT: peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 1); break; case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: peripheral->gatt_client_state = P_READY; send_gatt_complete_event(peripheral, 0); break; default: break; } break; case ATT_ERROR_RESPONSE: switch (packet[4]){ case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { switch(peripheral->gatt_client_state){ case P_W4_SERVICE_QUERY_RESULT: case P_W4_SERVICE_WITH_UUID_RESULT: case P_W4_INCLUDED_SERVICE_QUERY_RESULT: case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: send_gatt_complete_event(peripheral, 0); break; case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: characteristic_end_found(peripheral, peripheral->end_group_handle); send_gatt_complete_event(peripheral, 0); break; default: gatt_client_report_error_if_pending(peripheral, packet[4]); break; } break; } default: gatt_client_report_error_if_pending(peripheral, packet[4]); break; } peripheral->gatt_client_state = P_READY; break; default: printf("ATT Handler, unhandled response type 0x%02x\n", packet[0]); break; } gatt_client_run(); } le_command_status_t gatt_client_discover_primary_services(gatt_client_t *peripheral){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->start_group_handle = 0x0001; peripheral->end_group_handle = 0xffff; peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_discover_primary_services_by_uuid16(gatt_client_t *peripheral, uint16_t uuid16){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->start_group_handle = 0x0001; peripheral->end_group_handle = 0xffff; peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; peripheral->uuid16 = uuid16; sdp_normalize_uuid((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_discover_primary_services_by_uuid128(gatt_client_t *peripheral, const uint8_t * uuid128){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->start_group_handle = 0x0001; peripheral->end_group_handle = 0xffff; peripheral->uuid16 = 0; memcpy(peripheral->uuid128, uuid128, 16); peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_discover_characteristics_for_service(gatt_client_t *peripheral, le_service_t *service){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->start_group_handle = service->start_group_handle; peripheral->end_group_handle = service->end_group_handle; peripheral->filter_with_uuid = 0; peripheral->characteristic_start_handle = 0; peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_find_included_services_for_service(gatt_client_t *peripheral, le_service_t *service){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->start_group_handle = service->start_group_handle; peripheral->end_group_handle = service->end_group_handle; peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_discover_characteristics_for_handle_range_by_uuid16(gatt_client_t *peripheral, uint16_t start_handle, uint16_t end_handle, uint16_t uuid16){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->start_group_handle = start_handle; peripheral->end_group_handle = end_handle; peripheral->filter_with_uuid = 1; peripheral->uuid16 = uuid16; sdp_normalize_uuid((uint8_t*) &(peripheral->uuid128), uuid16); peripheral->characteristic_start_handle = 0; peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_discover_characteristics_for_handle_range_by_uuid128(gatt_client_t *peripheral, uint16_t start_handle, uint16_t end_handle, uint8_t * uuid128){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->start_group_handle = start_handle; peripheral->end_group_handle = end_handle; peripheral->filter_with_uuid = 1; peripheral->uuid16 = 0; memcpy(peripheral->uuid128, uuid128, 16); peripheral->characteristic_start_handle = 0; peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_discover_characteristics_for_service_by_uuid16 (gatt_client_t *peripheral, le_service_t *service, uint16_t uuid16){ return gatt_client_discover_characteristics_for_handle_range_by_uuid16(peripheral, service->start_group_handle, service->end_group_handle, uuid16); } le_command_status_t gatt_client_discover_characteristics_for_service_by_uuid128(gatt_client_t *peripheral, le_service_t *service, uint8_t * uuid128){ return gatt_client_discover_characteristics_for_handle_range_by_uuid128(peripheral, service->start_group_handle, service->end_group_handle, uuid128); } le_command_status_t gatt_client_discover_characteristic_descriptors(gatt_client_t *peripheral, le_characteristic_t *characteristic){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; if (characteristic->value_handle == characteristic->end_handle){ send_gatt_complete_event(peripheral, 0); return BLE_PERIPHERAL_OK; } peripheral->start_group_handle = characteristic->value_handle + 1; peripheral->end_group_handle = characteristic->end_handle; peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_read_value_of_characteristic_using_value_handle(gatt_client_t *peripheral, uint16_t value_handle){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = value_handle; peripheral->attribute_offset = 0; peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_read_value_of_characteristic(gatt_client_t *peripheral, le_characteristic_t *characteristic){ return gatt_client_read_value_of_characteristic_using_value_handle(peripheral, characteristic->value_handle); } le_command_status_t gatt_client_read_long_value_of_characteristic_using_value_handle(gatt_client_t *peripheral, uint16_t value_handle){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = value_handle; peripheral->attribute_offset = 0; peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_read_long_value_of_characteristic(gatt_client_t *peripheral, le_characteristic_t *characteristic){ return gatt_client_read_long_value_of_characteristic_using_value_handle(peripheral, characteristic->value_handle); } le_command_status_t gatt_client_write_value_of_characteristic_without_response(gatt_client_t *peripheral, uint16_t value_handle, uint16_t value_length, uint8_t * value){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; if (value_length >= peripheral->mtu - 3) return BLE_VALUE_TOO_LONG; att_write_request(ATT_WRITE_COMMAND, peripheral->handle, value_handle, value_length, value); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_write_value_of_characteristic(gatt_client_t *peripheral, uint16_t value_handle, uint16_t value_length, uint8_t * value){ if (!gatt_client_is_ready(peripheral)) { hci_dump_log("gatt client not ready"); return BLE_PERIPHERAL_IN_WRONG_STATE; } peripheral->attribute_handle = value_handle; peripheral->attribute_length = value_length; peripheral->attribute_value = value; peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_write_long_value_of_characteristic(gatt_client_t *peripheral, uint16_t value_handle, uint16_t value_length, uint8_t * value){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = value_handle; peripheral->attribute_length = value_length; peripheral->attribute_offset = 0; peripheral->attribute_value = value; peripheral->gatt_client_state = P_W2_PREPARE_WRITE; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_reliable_write_long_value_of_characteristic(gatt_client_t *peripheral, uint16_t value_handle, uint16_t value_length, uint8_t * value){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = value_handle; peripheral->attribute_length = value_length; peripheral->attribute_offset = 0; peripheral->attribute_value = value; peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_write_client_characteristic_configuration(gatt_client_t *peripheral, le_characteristic_t * characteristic, uint16_t configuration){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { log_info("le_central_write_client_characteristic_configuration: BLE_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); return BLE_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ log_info("le_central_write_client_characteristic_configuration: BLE_CHARACTERISTIC_INDICATION_NOT_SUPPORTED\n"); return BLE_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; } peripheral->start_group_handle = characteristic->value_handle; peripheral->end_group_handle = characteristic->end_handle; bt_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_read_characteristic_descriptor(gatt_client_t *peripheral, le_characteristic_descriptor_t * descriptor){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = descriptor->handle; peripheral->uuid16 = descriptor->uuid16; if (!descriptor->uuid16){ memcpy(peripheral->uuid128, descriptor->uuid128, 16); } peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_read_long_characteristic_descriptor(gatt_client_t *peripheral, le_characteristic_descriptor_t * descriptor){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = descriptor->handle; peripheral->attribute_offset = 0; peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_write_characteristic_descriptor(gatt_client_t *peripheral, le_characteristic_descriptor_t * descriptor, uint16_t length, uint8_t * value){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = descriptor->handle; peripheral->attribute_length = length; peripheral->attribute_offset = 0; peripheral->attribute_value = value; peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; gatt_client_run(); return BLE_PERIPHERAL_OK; } le_command_status_t gatt_client_write_long_characteristic_descriptor(gatt_client_t *peripheral, le_characteristic_descriptor_t * descriptor, uint16_t length, uint8_t * value){ if (!gatt_client_is_ready(peripheral)) return BLE_PERIPHERAL_IN_WRONG_STATE; peripheral->attribute_handle = descriptor->handle; peripheral->attribute_length = length; peripheral->attribute_offset = 0; peripheral->attribute_value = value; peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; gatt_client_run(); return BLE_PERIPHERAL_OK; } // used by daemon void gatt_client_disconnect_connection(void * connection){ if (!connection) return; linked_item_t *it; for (it = (linked_item_t *) gatt_client_connections; it ; it = it->next){ gatt_client_t * client = (gatt_client_t *) it; if (client->context == connection){ gap_disconnect(client->handle); } } }