/* * Copyright (C) 2014 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. Any redistribution, use, or modification is done solely for * personal benefit and not for any commercial purpose or for * monetary gain. * * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH 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 BLUEKITCHEN * GMBH 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. * * Please inquire about commercial licensing options at * contact@bluekitchen-gmbh.com * */ #define BTSTACK_FILE__ "gatt_client.c" #include #include #include #include "btstack_config.h" #include "ble/att_dispatch.h" #include "ad_parser.h" #include "ble/att_db.h" #include "ble/gatt_client.h" #include "ble/le_device_db.h" #include "ble/sm.h" #include "btstack_debug.h" #include "btstack_event.h" #include "btstack_memory.h" #include "btstack_run_loop.h" #include "btstack_util.h" #include "hci.h" #include "hci_dump.h" #include "l2cap.h" static btstack_linked_list_t gatt_client_connections; static btstack_linked_list_t gatt_client_value_listeners; static btstack_packet_callback_registration_t hci_event_callback_registration; static btstack_packet_callback_registration_t sm_event_callback_registration; // GATT Client Configuration static bool gatt_client_mtu_exchange_enabled; static gap_security_level_t gatt_client_required_security_level; static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); #ifdef ENABLE_LE_SIGNED_WRITE static void att_signed_write_handle_cmac_result(uint8_t hash[8]); #endif void gatt_client_init(void){ gatt_client_connections = NULL; // default configuration gatt_client_mtu_exchange_enabled = true; gatt_client_required_security_level = LEVEL_0; // register for HCI Events hci_event_callback_registration.callback = &gatt_client_event_packet_handler; hci_add_event_handler(&hci_event_callback_registration); // register for SM Events sm_event_callback_registration.callback = &gatt_client_event_packet_handler; sm_add_event_handler(&sm_event_callback_registration); // and ATT Client PDUs att_dispatch_register_client(gatt_client_att_packet_handler); } void gatt_client_set_required_security_level(gap_security_level_t level){ gatt_client_required_security_level = level; } static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ btstack_linked_list_iterator_t it; btstack_linked_list_iterator_init(&it, &gatt_client_connections); while (btstack_linked_list_iterator_has_next(&it)){ gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); if (&gatt_client->gc_timeout == ts) { return gatt_client; } } return NULL; } static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ gatt_client_t * gatt_client = gatt_client_for_timer(timer); if (gatt_client == NULL) return; log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); } static void gatt_client_timeout_start(gatt_client_t * gatt_client){ log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); btstack_run_loop_remove_timer(&gatt_client->gc_timeout); btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout btstack_run_loop_add_timer(&gatt_client->gc_timeout); } static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); btstack_run_loop_remove_timer(&gatt_client->gc_timeout); } static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ uint8_t encryption_key_size = gap_encryption_key_size(con_handle); if (encryption_key_size == 0) return LEVEL_0; bool authenticated = gap_authenticated(con_handle); if (!authenticated) return LEVEL_2; return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; } static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ btstack_linked_item_t *it; for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ gatt_client_t * gatt_client = (gatt_client_t *) it; if (gatt_client->con_handle == handle){ return gatt_client; } } return NULL; } // @return gatt_client context // returns existing one, or tries to setup new one static gatt_client_t * gatt_client_provide_context_for_handle(hci_con_handle_t con_handle){ gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); if (gatt_client != NULL) return gatt_client; // bail if no such hci connection hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); if (hci_connection == NULL){ log_error("No connection for handle 0x%04x", con_handle); return NULL; } gatt_client = btstack_memory_gatt_client_get(); if (!gatt_client) return NULL; // init state gatt_client->con_handle = con_handle; gatt_client->mtu = ATT_DEFAULT_MTU; gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); if (gatt_client_mtu_exchange_enabled){ gatt_client->mtu_state = SEND_MTU_EXCHANGE; } else { gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; } gatt_client->gatt_client_state = P_READY; btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); // get unenhanced att bearer state if (hci_connection->att_connection.mtu_exchanged){ gatt_client->mtu = hci_connection->att_connection.mtu; gatt_client->mtu_state = MTU_EXCHANGED; } return gatt_client; } static gatt_client_t * gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); if (gatt_client == NULL) return NULL; gatt_client_timeout_start(gatt_client); return gatt_client; } static bool is_ready(gatt_client_t * gatt_client){ return gatt_client->gatt_client_state == P_READY; } int gatt_client_is_ready(hci_con_handle_t con_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); if (gatt_client == NULL) return 0; return is_ready(gatt_client) ? 1 : 0; } void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ gatt_client_mtu_exchange_enabled = enabled != 0; } uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ *mtu = gatt_client->mtu; return ERROR_CODE_SUCCESS; } *mtu = ATT_DEFAULT_MTU; return GATT_CLIENT_IN_WRONG_STATE; } // precondition: can_send_packet_now == TRUE static uint8_t att_confirmation(uint16_t con_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = ATT_HANDLE_VALUE_CONFIRMATION; return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); } // precondition: can_send_packet_now == TRUE static uint8_t att_find_information_request(uint8_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; little_endian_store_16(request, 1, start_handle); little_endian_store_16(request, 3, end_handle); return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); } // precondition: can_send_packet_now == TRUE static uint8_t att_find_by_type_value_request(uint8_t request_type, uint16_t attribute_group_type, uint16_t con_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; little_endian_store_16(request, 1, start_handle); little_endian_store_16(request, 3, end_handle); little_endian_store_16(request, 5, attribute_group_type); (void)memcpy(&request[7], value, value_size); return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); } // precondition: can_send_packet_now == TRUE static uint8_t att_read_by_type_or_group_request_for_uuid16(uint8_t request_type, uint16_t uuid16, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; little_endian_store_16(request, 1, start_handle); little_endian_store_16(request, 3, end_handle); little_endian_store_16(request, 5, uuid16); return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); } // precondition: can_send_packet_now == TRUE static uint8_t att_read_by_type_or_group_request_for_uuid128(uint8_t request_type, const uint8_t * uuid128, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; little_endian_store_16(request, 1, start_handle); little_endian_store_16(request, 3, end_handle); reverse_128(uuid128, &request[5]); return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); } // precondition: can_send_packet_now == TRUE static uint8_t att_read_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; little_endian_store_16(request, 1, attribute_handle); return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); } // precondition: can_send_packet_now == TRUE static uint8_t att_read_blob_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = request_type; little_endian_store_16(request, 1, attribute_handle); little_endian_store_16(request, 3, value_offset); return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); } static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ l2cap_reserve_packet_buffer(); uint8_t * request = l2cap_get_outgoing_buffer(); request[0] = ATT_READ_MULTIPLE_REQUEST; int i; int offset = 1; for (i=0;imtu - 5u; if (gatt_client->attribute_offset >= gatt_client->attribute_length) { return 0; } uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; if (max_blob_length > rest_length){ return rest_length; } return max_blob_length; } static void send_gatt_services_request(gatt_client_t *gatt_client){ att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); } static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ if (gatt_client->uuid16){ uint8_t uuid16[2]; little_endian_store_16(uuid16, 0, gatt_client->uuid16); att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); return; } uint8_t uuid128[16]; reverse_128(gatt_client->uuid128, uuid128); att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); } static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); } static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); } static void send_gatt_included_service_request(gatt_client_t *gatt_client){ att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); } static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); } static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); } static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); } static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ if (gatt_client->uuid16){ att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); } else { att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid128, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); } } static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ if (gatt_client->attribute_offset == 0){ att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); } else { att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); } } static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); } static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); } static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); } static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset, write_blob_length(gatt_client), gatt_client->attribute_value); } static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); } static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); } #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); } #endif static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); } #ifdef ENABLE_LE_SIGNED_WRITE static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, gatt_client->cmac); } #endif static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ if (size < 2) return 0xffff; uint8_t attr_length = packet[1]; if ((2 + attr_length) > size) return 0xffff; return little_endian_read_16(packet, size - attr_length + 2u); } static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ if (size < 2) return 0xffff; uint8_t attr_length = packet[1]; if ((2 + attr_length) > size) return 0xffff; return little_endian_read_16(packet, size - attr_length + 3u); } static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ if (size < 2) return 0xffff; uint8_t attr_length = packet[1]; if ((2 + attr_length) > size) return 0xffff; return little_endian_read_16(packet, size - attr_length); } static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ gatt_client->gatt_client_state = P_READY; gatt_client_timeout_stop(gatt_client); } static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ if (!callback) return; hci_dump_packet(HCI_EVENT_PACKET, 1, packet, size); (*callback)(HCI_EVENT_PACKET, 0, packet, size); } void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ notification->callback = callback; notification->con_handle = con_handle; if (characteristic == NULL){ notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; } else { notification->attribute_handle = characteristic->value_handle; } btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); } void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); } static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ btstack_linked_list_iterator_t it; btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); while (btstack_linked_list_iterator_has_next(&it)){ gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); } } static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ // @format H1 uint8_t packet[5]; packet[0] = GATT_EVENT_QUERY_COMPLETE; packet[1] = 3; little_endian_store_16(packet, 2, gatt_client->con_handle); packet[4] = att_status; emit_event_new(gatt_client->callback, packet, sizeof(packet)); } static void emit_gatt_service_query_result_event(gatt_client_t * gatt_client, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ // @format HX uint8_t packet[24]; packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; packet[1] = sizeof(packet) - 2u; little_endian_store_16(packet, 2, gatt_client->con_handle); /// little_endian_store_16(packet, 4, start_group_handle); little_endian_store_16(packet, 6, end_group_handle); reverse_128(uuid128, &packet[8]); emit_event_new(gatt_client->callback, packet, sizeof(packet)); } static void emit_gatt_included_service_query_result_event(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ // @format HX uint8_t packet[26]; packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; packet[1] = sizeof(packet) - 2u; little_endian_store_16(packet, 2, gatt_client->con_handle); /// little_endian_store_16(packet, 4, include_handle); // little_endian_store_16(packet, 6, start_group_handle); little_endian_store_16(packet, 8, end_group_handle); reverse_128(uuid128, &packet[10]); emit_event_new(gatt_client->callback, packet, sizeof(packet)); } static void emit_gatt_characteristic_query_result_event(gatt_client_t * gatt_client, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, uint16_t properties, const uint8_t * uuid128){ // @format HY uint8_t packet[28]; packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; packet[1] = sizeof(packet) - 2u; little_endian_store_16(packet, 2, gatt_client->con_handle); /// little_endian_store_16(packet, 4, start_handle); little_endian_store_16(packet, 6, value_handle); little_endian_store_16(packet, 8, end_handle); little_endian_store_16(packet, 10, properties); reverse_128(uuid128, &packet[12]); emit_event_new(gatt_client->callback, packet, sizeof(packet)); } static void emit_gatt_all_characteristic_descriptors_result_event( gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ // @format HZ uint8_t packet[22]; packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; packet[1] = sizeof(packet) - 2u; little_endian_store_16(packet, 2, gatt_client->con_handle); /// little_endian_store_16(packet, 4, descriptor_handle); reverse_128(uuid128, &packet[6]); emit_event_new(gatt_client->callback, packet, sizeof(packet)); } static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ // @format H2 uint8_t packet[6]; packet[0] = GATT_EVENT_MTU; packet[1] = sizeof(packet) - 2u; little_endian_store_16(packet, 2, gatt_client->con_handle); little_endian_store_16(packet, 4, new_mtu); att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); emit_event_new(gatt_client->callback, packet, sizeof(packet)); } /// static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ if (size < 2) return; uint8_t attr_length = packet[1]; uint8_t uuid_length = attr_length - 4u; int i; for (i = 2; (i+attr_length) <= size; i += attr_length){ uint16_t start_group_handle = little_endian_read_16(packet,i); uint16_t end_group_handle = little_endian_read_16(packet,i+2); uint8_t uuid128[16]; uint16_t uuid16 = 0; if (uuid_length == 2u){ uuid16 = little_endian_read_16(packet, i+4); uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); } else if (uuid_length == 16u) { reverse_128(&packet[i+4], uuid128); } else { return; } emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); } } // helper static void characteristic_start_found(gatt_client_t * gatt_client, 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 = 0; if (uuid_length == 2u){ uuid16 = little_endian_read_16(uuid, 0); uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); } else if (uuid_length == 16u){ reverse_128(uuid, uuid128); } else { return; } if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; gatt_client->characteristic_properties = properties; gatt_client->characteristic_start_handle = start_handle; gatt_client->attribute_handle = value_handle; if (gatt_client->filter_with_uuid) return; gatt_client->uuid16 = uuid16; (void)memcpy(gatt_client->uuid128, uuid128, 16); } static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ // TODO: stop searching if filter and uuid found if (!gatt_client->characteristic_start_handle) return; emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); gatt_client->characteristic_start_handle = 0; } static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ if (size < 2u) return; uint8_t attr_length = packet[1]; if ((attr_length != 7u) && (attr_length != 21u)) return; uint8_t uuid_length = attr_length - 5u; int i; for (i = 2u; (i + attr_length) <= size; i += attr_length){ uint16_t start_handle = little_endian_read_16(packet, i); uint8_t properties = packet[i+2]; uint16_t value_handle = little_endian_read_16(packet, i+3); characteristic_end_found(gatt_client, start_handle - 1u); characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); } } static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ uint8_t normalized_uuid128[16]; uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, gatt_client->query_end_handle, normalized_uuid128); } static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, gatt_client->query_end_handle, uuid128); } // @return packet pointer // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers static const int characteristic_value_event_header_size = 8; static uint8_t * setup_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * value, uint16_t length){ #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION // avoid using pre ATT headers. return NULL; #endif // before the value inside the ATT PDU uint8_t * packet = value - characteristic_value_event_header_size; packet[0] = type; packet[1] = characteristic_value_event_header_size - 2 + length; little_endian_store_16(packet, 2, con_handle); little_endian_store_16(packet, 4, attribute_handle); little_endian_store_16(packet, 6, length); return packet; } // @return packet pointer // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes static const int long_characteristic_value_event_header_size = 10; static uint8_t * setup_long_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * value, uint16_t length){ #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION // avoid using pre ATT headers. return NULL; #endif #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) // before the value inside the ATT PDU uint8_t * packet = value - long_characteristic_value_event_header_size; packet[0] = type; packet[1] = long_characteristic_value_event_header_size - 2 + length; little_endian_store_16(packet, 2, con_handle); little_endian_store_16(packet, 4, attribute_handle); little_endian_store_16(packet, 6, offset); little_endian_store_16(packet, 8, length); return packet; #else log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); return NULL; #endif } // test if notification/indication should be delivered to application (BLESA) static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION // ignore messages until re-encryption is complete if (gap_reconnect_security_setup_active(con_handle)) return false; // after that ignore if bonded but not encrypted return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); #else UNUSED(con_handle); return true; #endif } // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ if (!gatt_client_accept_server_message(con_handle)) return; uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); } // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ if (!gatt_client_accept_server_message(con_handle)) return; uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); } // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); } // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes static void report_gatt_long_characteristic_value_blob(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value_offset, blob, blob_length); if (!packet) return; emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); } static void report_gatt_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ UNUSED(value_offset); uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); emit_event_new(gatt_client->callback, packet, value_length + 8u); } static void report_gatt_long_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *blob, uint16_t blob_length, uint16_t value_offset){ uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value_offset, blob, blob_length); if (!packet) return; emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); } static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ int i; for (i = 0u; (i + pair_size) <= size; i += pair_size){ uint16_t descriptor_handle = little_endian_read_16(packet,i); uint8_t uuid128[16]; uint16_t uuid16 = 0; if (pair_size == 4u){ uuid16 = little_endian_read_16(packet,i+2); uuid_add_bluetooth_prefix(uuid128, uuid16); } else { reverse_128(&packet[i+2], uuid128); } emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); } } static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ return last_result_handle >= gatt_client->end_group_handle; } static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ if (is_query_done(gatt_client, last_result_handle)){ gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); return; } // next gatt_client->start_group_handle = last_result_handle + 1u; gatt_client->gatt_client_state = next_query_state; } static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); } static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); } static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); } static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ if (is_query_done(gatt_client, last_result_handle)){ // report last characteristic characteristic_end_found(gatt_client, gatt_client->end_group_handle); } trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); } static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); } static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); } static void trigger_next_prepare_write_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ gatt_client->attribute_offset += write_blob_length(gatt_client); uint16_t next_blob_length = write_blob_length(gatt_client); if (next_blob_length == 0u){ gatt_client->gatt_client_state = done_state; return; } gatt_client->gatt_client_state = next_query_state; } static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ uint16_t max_blob_length = gatt_client->mtu - 1u; if (received_blob_length < max_blob_length){ gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); return; } gatt_client->attribute_offset += received_blob_length; gatt_client->gatt_client_state = next_query_state; } static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ uint16_t attribute_handle = little_endian_read_16(packet, 1); uint16_t value_offset = little_endian_read_16(packet, 3); if (gatt_client->attribute_handle != attribute_handle) return 0; if (gatt_client->attribute_offset != value_offset) return 0; return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; } // returns 1 if packet was sent static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ // wait until re-encryption is complete if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; // wait until re-encryption is complete if (gatt_client->reencryption_active) return false; // wait until pairing complete (either reactive authentication or due to required security level) if (gatt_client->wait_for_authentication_complete) return false; bool client_request_pending = gatt_client->gatt_client_state != P_READY; // verify security level for Mandatory Authentication if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); gatt_client->wait_for_authentication_complete = 1; // set att error code for pairing failure based on required level switch (gatt_client_required_security_level){ case LEVEL_4: case LEVEL_3: gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; break; default: gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; break; } sm_request_pairing(gatt_client->con_handle); // sm probably just sent a pdu return true; } switch (gatt_client->mtu_state) { case SEND_MTU_EXCHANGE: gatt_client->mtu_state = SENT_MTU_EXCHANGE; att_exchange_mtu_request(gatt_client->con_handle); return true; case SENT_MTU_EXCHANGE: return false; default: break; } if (gatt_client->send_confirmation){ gatt_client->send_confirmation = 0; att_confirmation(gatt_client->con_handle); return true; } // check MTU for writes switch (gatt_client->gatt_client_state){ case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); return false; default: break; } switch (gatt_client->gatt_client_state){ case P_W2_SEND_SERVICE_QUERY: gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; send_gatt_services_request(gatt_client); return true; case P_W2_SEND_SERVICE_WITH_UUID_QUERY: gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; send_gatt_services_by_uuid_request(gatt_client); return true; case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; send_gatt_characteristic_request(gatt_client); return true; case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; send_gatt_characteristic_request(gatt_client); return true; case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; send_gatt_characteristic_descriptor_request(gatt_client); return true; case P_W2_SEND_INCLUDED_SERVICE_QUERY: gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; send_gatt_included_service_request(gatt_client); return true; case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; send_gatt_included_service_uuid_request(gatt_client); return true; case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; send_gatt_read_characteristic_value_request(gatt_client); return true; case P_W2_SEND_READ_BLOB_QUERY: gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; send_gatt_read_blob_request(gatt_client); return true; case P_W2_SEND_READ_BY_TYPE_REQUEST: gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; send_gatt_read_by_type_request(gatt_client); return true; case P_W2_SEND_READ_MULTIPLE_REQUEST: gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; send_gatt_read_multiple_request(gatt_client); return true; case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; send_gatt_write_attribute_value_request(gatt_client); return true; case P_W2_PREPARE_WRITE: gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; send_gatt_prepare_write_request(gatt_client); return true; case P_W2_PREPARE_WRITE_SINGLE: gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; send_gatt_prepare_write_request(gatt_client); return true; case P_W2_PREPARE_RELIABLE_WRITE: gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; send_gatt_prepare_write_request(gatt_client); return true; case P_W2_EXECUTE_PREPARED_WRITE: gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; send_gatt_execute_write_request(gatt_client); return true; case P_W2_CANCEL_PREPARED_WRITE: gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; send_gatt_cancel_prepared_write_request(gatt_client); return true; case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; send_gatt_cancel_prepared_write_request(gatt_client); return true; #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: // use Find Information gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; send_gatt_characteristic_descriptor_request(gatt_client); #else case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: // Use Read By Type gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; send_gatt_read_client_characteristic_configuration_request(gatt_client); #endif return true; case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_read_characteristic_descriptor_request(gatt_client); return true; case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_read_blob_request(gatt_client); return true; case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_write_attribute_value_request(gatt_client); return true; case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; send_gatt_write_client_characteristic_configuration_request(gatt_client); return true; case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_prepare_write_request(gatt_client); return true; case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; send_gatt_execute_write_request(gatt_client); return true; #ifdef ENABLE_LE_SIGNED_WRITE case P_W4_IDENTITY_RESOLVING: log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); switch (sm_identity_resolving_state(gatt_client->con_handle)){ case IRK_LOOKUP_SUCCEEDED: gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); gatt_client->gatt_client_state = P_W4_CMAC_READY; break; case IRK_LOOKUP_FAILED: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); return false; default: return false; } /* Fall through */ case P_W4_CMAC_READY: if (sm_cmac_ready()){ sm_key_t csrk; le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); gatt_client->gatt_client_state = P_W4_CMAC_RESULT; sm_cmac_signed_write_start(csrk, ATT_SIGNED_WRITE_COMMAND, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, att_signed_write_handle_cmac_result); } return false; case P_W2_SEND_SIGNED_WRITE: { gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; // bump local signing counter uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); // send signed write command send_gatt_signed_write_request(gatt_client, sign_counter); // finally, notifiy client that write is complete gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); return true; } #endif default: break; } // requested can send snow? if (gatt_client->write_without_response_callback){ btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; gatt_client->write_without_response_callback = NULL; uint8_t event[4]; event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; event[1] = sizeof(event) - 2u; little_endian_store_16(event, 2, gatt_client->con_handle); packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); return true; // to trigger requeueing (even if higher layer didn't sent) } return false; } static void gatt_client_run(void){ btstack_linked_item_t *it; for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ gatt_client_t * gatt_client = (gatt_client_t *) it; if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); return; } bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); if (packet_sent){ // request new permission att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); // requeue client for fairness and exit // note: iterator has become invalid btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); return; } } } static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { if (is_ready(gatt_client) == 1) return; gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, att_error_code); } static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); if (gatt_client == NULL) return; // update security level gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); gatt_client->reencryption_active = false; gatt_client->wait_for_authentication_complete = 0; if (gatt_client->gatt_client_state == P_READY) return; switch (sm_event_reencryption_complete_get_status(packet)){ case ERROR_CODE_SUCCESS: log_info("re-encryption success, retry operation"); break; case ERROR_CODE_AUTHENTICATION_FAILURE: case ERROR_CODE_PIN_OR_KEY_MISSING: #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) if (gatt_client_required_security_level == LEVEL_0) { // re-encryption failed for reactive authentication with pairing and we have a pending client request // => try to resolve it by deleting bonding information if we started pairing before // delete bonding information int le_device_db_index = sm_le_device_index(gatt_client->con_handle); btstack_assert(le_device_db_index >= 0); log_info("reactive auth with pairing: delete bonding and start pairing"); #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); #endif le_device_db_remove(le_device_db_index); // trigger pairing again sm_request_pairing(gatt_client->con_handle); break; } #endif // report bonding information missing gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); break; default: // report bonding information missing gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); break; } } static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); hci_con_handle_t con_handle = little_endian_read_16(packet,3); gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); if (gatt_client == NULL) return; gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); gatt_client_timeout_stop(gatt_client); btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); btstack_memory_gatt_client_free(gatt_client); } static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); // ok: handling own l2cap events UNUSED(size); // ok: there is no channel if (packet_type != HCI_EVENT_PACKET) return; hci_con_handle_t con_handle; gatt_client_t * gatt_client; switch (hci_event_packet_get_type(packet)) { case HCI_EVENT_DISCONNECTION_COMPLETE: gatt_client_handle_disconnection_complete(packet); break; // Pairing complete (with/without bonding=storing of pairing information) case SM_EVENT_PAIRING_COMPLETE: con_handle = sm_event_pairing_complete_get_handle(packet); gatt_client = gatt_client_get_context_for_handle(con_handle); if (gatt_client == NULL) break; // update security level gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); if (gatt_client->wait_for_authentication_complete){ gatt_client->wait_for_authentication_complete = 0; if (sm_event_pairing_complete_get_status(packet)){ log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); } else { log_info("pairing success, retry operation"); } } break; #ifdef ENABLE_LE_SIGNED_WRITE // Identity Resolving completed (no code, gatt_client_run will continue) case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: case SM_EVENT_IDENTITY_RESOLVING_FAILED: break; #endif // re-encryption started case SM_EVENT_REENCRYPTION_STARTED: con_handle = sm_event_reencryption_complete_get_handle(packet); gatt_client = gatt_client_get_context_for_handle(con_handle); if (gatt_client == NULL) break; gatt_client->reencryption_active = true; gatt_client->reencryption_result = ERROR_CODE_SUCCESS; break; // re-encryption complete case SM_EVENT_REENCRYPTION_COMPLETE: gatt_client_handle_reencryption_complete(packet); 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){ gatt_client_t * gatt_client; if (size < 1u) return; if (packet_type == HCI_EVENT_PACKET) { switch (packet[0]){ case L2CAP_EVENT_CAN_SEND_NOW: gatt_client_run(); break; // att_server has negotiated the mtu for this connection, cache if context exists case ATT_EVENT_MTU_EXCHANGE_COMPLETE: if (size < 6u) break; gatt_client = gatt_client_get_context_for_handle(handle); if (gatt_client == NULL) break; gatt_client->mtu = little_endian_read_16(packet, 4); break; default: break; } return; } if (packet_type != ATT_DATA_PACKET) return; // special cases: notifications don't need a context while indications motivate creating one switch (packet[0]){ case ATT_HANDLE_VALUE_NOTIFICATION: if (size < 3u) return; report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); return; case ATT_HANDLE_VALUE_INDICATION: gatt_client = gatt_client_provide_context_for_handle(handle); break; default: gatt_client = gatt_client_get_context_for_handle(handle); break; } if (gatt_client == NULL) return; uint8_t error_code; switch (packet[0]){ case ATT_EXCHANGE_MTU_RESPONSE: { if (size < 3u) break; uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); uint16_t local_rx_mtu = l2cap_max_le_mtu(); uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; // set gatt client mtu gatt_client->mtu = mtu; gatt_client->mtu_state = MTU_EXCHANGED; // set per connection mtu state hci_connection_t * hci_connection = hci_connection_for_handle(handle); hci_connection->att_connection.mtu = gatt_client->mtu; hci_connection->att_connection.mtu_exchanged = true; emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); break; } case ATT_READ_BY_GROUP_TYPE_RESPONSE: switch(gatt_client->gatt_client_state){ case P_W4_SERVICE_QUERY_RESULT: report_gatt_services(gatt_client, packet, size); trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; default: break; } break; case ATT_HANDLE_VALUE_INDICATION: if (size < 3u) break; report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); gatt_client->send_confirmation = 1; break; case ATT_READ_BY_TYPE_RESPONSE: switch (gatt_client->gatt_client_state){ case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: report_gatt_characteristics(gatt_client, packet, size); trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR break; case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: report_gatt_characteristics(gatt_client, packet, size); trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR break; case P_W4_INCLUDED_SERVICE_QUERY_RESULT: { if (size < 2u) break; uint16_t uuid16 = 0; uint16_t pair_size = packet[1]; if (pair_size == 6u){ if (size < 8u) break; // UUIDs not available, query first included service gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query gatt_client->query_start_handle = little_endian_read_16(packet, 4); gatt_client->query_end_handle = little_endian_read_16(packet, 6); gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; break; } if (pair_size != 8u) break; // UUIDs included, report all of them uint16_t offset; for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ uint16_t include_handle = little_endian_read_16(packet, offset); gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); uuid16 = little_endian_read_16(packet, offset+6u); report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); } trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; } #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; break; #endif case P_W4_READ_BY_TYPE_RESPONSE: { uint16_t pair_size = packet[1]; // set last result handle to last valid handle, only used if pair_size invalid uint16_t last_result_handle = 0xffff; if (pair_size > 2){ uint16_t offset; for (offset = 2; offset < size ; offset += pair_size){ uint16_t value_handle = little_endian_read_16(packet, offset); report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); last_result_handle = value_handle; } } trigger_next_read_by_type_query(gatt_client, last_result_handle); break; } default: break; } break; case ATT_READ_RESPONSE: switch (gatt_client->gatt_client_state){ case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: if (size >= 17){ uint8_t uuid128[16]; reverse_128(&packet[1], uuid128); report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); } trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: gatt_client_handle_transaction_complete(gatt_client); report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client_handle_transaction_complete(gatt_client); report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; // Use ATT_READ_REQUEST for first blob of Read Long Characteristic case P_W4_READ_BLOB_RESULT: report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size-1u, gatt_client->attribute_offset); trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, size-1u); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; default: break; } break; case ATT_FIND_BY_TYPE_VALUE_RESPONSE: { uint8_t pair_size = 4; int i; uint16_t start_group_handle; uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results for (i = 1u; (i + pair_size) <= size; i += pair_size){ start_group_handle = little_endian_read_16(packet,i); end_group_handle = little_endian_read_16(packet,i+2); emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); } trigger_next_service_by_uuid_query(gatt_client, end_group_handle); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; } case ATT_FIND_INFORMATION_REPLY: { if (size < 2u) break; uint8_t pair_size = 4; if (packet[1u] == 2u){ pair_size = 18; } uint16_t offset = 2; if (size < (pair_size + offset)) break; uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ // iterate over descriptors looking for CCC if (pair_size == 4){ while ((offset + 4) <= size){ uint16_t uuid16 = little_endian_read_16(packet, offset + 2); if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); break; } offset += pair_size; } } if (is_query_done(gatt_client, last_descriptor_handle)){ } else { // next gatt_client->start_group_handle = last_descriptor_handle + 1; gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; } break; } #endif report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; } case ATT_WRITE_RESPONSE: switch (gatt_client->gatt_client_state){ case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; default: break; } break; case ATT_READ_BLOB_RESPONSE:{ uint16_t received_blob_length = size-1u; switch(gatt_client->gatt_client_state){ case P_W4_READ_BLOB_RESULT: report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; default: break; } break; } case ATT_PREPARE_WRITE_RESPONSE: switch (gatt_client->gatt_client_state){ case P_W4_PREPARE_WRITE_SINGLE_RESULT: gatt_client_handle_transaction_complete(gatt_client); if (is_value_valid(gatt_client, packet, size)){ emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); } else { emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); } break; case P_W4_PREPARE_WRITE_RESULT:{ gatt_client->attribute_offset = little_endian_read_16(packet, 3); trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; } case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ gatt_client->attribute_offset = little_endian_read_16(packet, 3); trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; } case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ if (is_value_valid(gatt_client, packet, size)){ gatt_client->attribute_offset = little_endian_read_16(packet, 3); trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done break; } gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; break; } default: break; } break; case ATT_EXECUTE_WRITE_RESPONSE: switch (gatt_client->gatt_client_state){ case P_W4_EXECUTE_PREPARED_WRITE_RESULT: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; case P_W4_CANCEL_PREPARED_WRITE_RESULT: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); break; case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; default: break; } break; case ATT_READ_MULTIPLE_RESPONSE: switch(gatt_client->gatt_client_state){ case P_W4_READ_MULTIPLE_RESPONSE: report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; default: break; } break; case ATT_ERROR_RESPONSE: if (size < 5u) return; error_code = packet[4]; switch (error_code){ case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { switch(gatt_client->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: gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: characteristic_end_found(gatt_client, gatt_client->end_group_handle); gatt_client_handle_transaction_complete(gatt_client); emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); break; case P_W4_READ_BY_TYPE_RESPONSE: gatt_client_handle_transaction_complete(gatt_client); if (gatt_client->start_group_handle == gatt_client->query_start_handle){ emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); } else { emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); } break; default: gatt_client_report_error_if_pending(gatt_client, error_code); break; } break; } #ifdef ENABLE_GATT_CLIENT_PAIRING case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { // security too low if (gatt_client->security_counter > 0) { gatt_client_report_error_if_pending(gatt_client, error_code); break; } // start security gatt_client->security_counter++; // setup action int retry = 1; switch (gatt_client->gatt_client_state){ case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; break; case P_W4_READ_BLOB_RESULT: gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; break; case P_W4_READ_BY_TYPE_RESPONSE: gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; break; case P_W4_READ_MULTIPLE_RESPONSE: gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; break; case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; break; case P_W4_PREPARE_WRITE_RESULT: gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; break; case P_W4_PREPARE_WRITE_SINGLE_RESULT: gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; break; case P_W4_PREPARE_RELIABLE_WRITE_RESULT: gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; break; case P_W4_EXECUTE_PREPARED_WRITE_RESULT: gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; break; case P_W4_CANCEL_PREPARED_WRITE_RESULT: gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; break; case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; break; case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; break; case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; break; case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; break; case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; break; case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; break; case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; break; #ifdef ENABLE_LE_SIGNED_WRITE case P_W4_SEND_SINGED_WRITE_DONE: gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; break; #endif default: log_info("retry not supported for state %x", gatt_client->gatt_client_state); retry = 0; break; } if (!retry) { gatt_client_report_error_if_pending(gatt_client, error_code); break; } log_info("security error, start pairing"); // start pairing for higher security level gatt_client->wait_for_authentication_complete = 1; gatt_client->pending_error_code = error_code; sm_request_pairing(gatt_client->con_handle); break; } #endif // nothing we can do about that case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: default: gatt_client_report_error_if_pending(gatt_client, error_code); break; } break; default: log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); break; } gatt_client_run(); } #ifdef ENABLE_LE_SIGNED_WRITE static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ btstack_linked_list_iterator_t it; btstack_linked_list_iterator_init(&it, &gatt_client_connections); while (btstack_linked_list_iterator_has_next(&it)){ gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ // store result (void)memcpy(gatt_client->cmac, hash, 8); // reverse_64(hash, gatt_client->cmac); gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; gatt_client_run(); return; } } } uint8_t gatt_client_signed_write_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t message_len, uint8_t * message){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = value_handle; gatt_client->attribute_length = message_len; gatt_client->attribute_value = message; gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; gatt_client_run(); return ERROR_CODE_SUCCESS; } #endif uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = 0x0001; gatt_client->end_group_handle = 0xffff; gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = 0x0001; gatt_client->end_group_handle = 0xffff; gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = 0x0001; gatt_client->end_group_handle = 0xffff; gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; gatt_client->uuid16 = uuid16; uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = 0x0001; gatt_client->end_group_handle = 0xffff; gatt_client->uuid16 = 0; (void)memcpy(gatt_client->uuid128, uuid128, 16); gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = service->start_group_handle; gatt_client->end_group_handle = service->end_group_handle; gatt_client->filter_with_uuid = 0; gatt_client->characteristic_start_handle = 0; gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_find_included_services_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = service->start_group_handle; gatt_client->end_group_handle = service->end_group_handle; gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_discover_characteristics_for_handle_range_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, uint16_t uuid16){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = start_handle; gatt_client->end_group_handle = end_handle; gatt_client->filter_with_uuid = 1; gatt_client->uuid16 = uuid16; uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); gatt_client->characteristic_start_handle = 0; gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_discover_characteristics_for_handle_range_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, const uint8_t * uuid128){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = start_handle; gatt_client->end_group_handle = end_handle; gatt_client->filter_with_uuid = 1; gatt_client->uuid16 = 0; (void)memcpy(gatt_client->uuid128, uuid128, 16); gatt_client->characteristic_start_handle = 0; gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, uint16_t uuid16){ return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); } uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, const uint8_t * uuid128){ return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); } uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; if (characteristic->value_handle == characteristic->end_handle){ emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); return ERROR_CODE_SUCCESS; } gatt_client->callback = callback; gatt_client->start_group_handle = characteristic->value_handle + 1u; gatt_client->end_group_handle = characteristic->end_handle; gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_value_of_characteristic_using_value_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = value_handle; gatt_client->attribute_offset = 0; gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_value_of_characteristics_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, uint16_t uuid16){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = start_handle; gatt_client->end_group_handle = end_handle; gatt_client->query_start_handle = start_handle; gatt_client->query_end_handle = end_handle; gatt_client->uuid16 = uuid16; uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_value_of_characteristics_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, const uint8_t * uuid128){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->start_group_handle = start_handle; gatt_client->end_group_handle = end_handle; gatt_client->query_start_handle = start_handle; gatt_client->query_end_handle = end_handle; gatt_client->uuid16 = 0; (void)memcpy(gatt_client->uuid128, uuid128, 16); gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); } uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t offset){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = value_handle; gatt_client->attribute_offset = offset; gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle){ return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); } uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); } uint8_t gatt_client_read_multiple_characteristic_values(btstack_packet_handler_t callback, hci_con_handle_t con_handle, int num_value_handles, uint16_t * value_handles){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->read_multiple_handle_count = num_value_handles; gatt_client->read_multiple_handles = value_handles; gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_write_value_of_characteristic_without_response(hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); } uint8_t gatt_client_write_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = value_handle; gatt_client->attribute_length = value_length; gatt_client->attribute_value = value; gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_write_long_value_of_characteristic_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = value_handle; gatt_client->attribute_length = value_length; gatt_client->attribute_offset = offset; gatt_client->attribute_value = value; gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_write_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); } uint8_t gatt_client_reliable_write_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = value_handle; gatt_client->attribute_length = value_length; gatt_client->attribute_offset = 0; gatt_client->attribute_value = value; gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_write_client_characteristic_configuration(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic, uint16_t configuration){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; } gatt_client->callback = callback; gatt_client->start_group_handle = characteristic->value_handle; gatt_client->end_group_handle = characteristic->end_handle; little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; #else gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; #endif gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = descriptor_handle; gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); } uint8_t gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t offset){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = descriptor_handle; gatt_client->attribute_offset = offset; gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle){ return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); } uint8_t gatt_client_read_long_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); } uint8_t gatt_client_write_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t value_length, uint8_t * value){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = descriptor_handle; gatt_client->attribute_length = value_length; gatt_client->attribute_offset = 0; gatt_client->attribute_value = value; gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_write_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t value_length, uint8_t * value){ return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); } uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = descriptor_handle; gatt_client->attribute_length = value_length; gatt_client->attribute_offset = offset; gatt_client->attribute_value = value; gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; gatt_client_run(); return ERROR_CODE_SUCCESS; } uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t value_length, uint8_t * value){ return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); } uint8_t gatt_client_write_long_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t value_length, uint8_t * value){ return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); } /** * @brief -> gatt complete event */ uint8_t gatt_client_prepare_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->attribute_handle = attribute_handle; gatt_client->attribute_length = value_length; gatt_client->attribute_offset = offset; gatt_client->attribute_value = value; gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; gatt_client_run(); return ERROR_CODE_SUCCESS; } /** * @brief -> gatt complete event */ uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; gatt_client_run(); return ERROR_CODE_SUCCESS; } /** * @brief -> gatt complete event */ uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; gatt_client->callback = callback; gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; gatt_client_run(); return ERROR_CODE_SUCCESS; } void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ service->start_group_handle = little_endian_read_16(packet, offset); service->end_group_handle = little_endian_read_16(packet, offset + 2); reverse_128(&packet[offset + 4], service->uuid128); if (uuid_has_bluetooth_prefix(service->uuid128)){ service->uuid16 = big_endian_read_32(service->uuid128, 0); } else { service->uuid16 = 0; } } void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ characteristic->start_handle = little_endian_read_16(packet, offset); characteristic->value_handle = little_endian_read_16(packet, offset + 2); characteristic->end_handle = little_endian_read_16(packet, offset + 4); characteristic->properties = little_endian_read_16(packet, offset + 6); reverse_128(&packet[offset+8], characteristic->uuid128); if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); } else { characteristic->uuid16 = 0; } } void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ descriptor->handle = little_endian_read_16(packet, offset); reverse_128(&packet[offset+2], descriptor->uuid128); if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); } else { descriptor->uuid16 = 0; } } void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); if (context == NULL) return; if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ context->callback = callback; context->mtu_state = SEND_MTU_EXCHANGE; gatt_client_run(); } } uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; context->write_without_response_callback = callback; att_dispatch_client_request_can_send_now_event(context->con_handle); return ERROR_CODE_SUCCESS; } #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ gatt_client_att_packet_handler(packet_type, handle, packet, size); } #endif