/****************************************************************************** * * Copyright 2014 Google, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ #define LOG_TAG "bt_hci" #include "hci_packet_parser.h" #include #include "buffer_allocator.h" #include "hci_layer.h" #include "hcimsgs.h" #include "osi/include/log.h" static const command_opcode_t NO_OPCODE_CHECKING = 0; static const allocator_t* buffer_allocator; static uint8_t* read_command_complete_header(BT_HDR* response, command_opcode_t expected_opcode, size_t minimum_bytes_after); static void parse_generic_command_complete(BT_HDR* response) { read_command_complete_header(response, NO_OPCODE_CHECKING, 0 /* bytes after */); buffer_allocator->free(response); } static void parse_read_buffer_size_response(BT_HDR* response, uint16_t* data_size_ptr, uint16_t* acl_buffer_count_ptr) { uint8_t* stream = read_command_complete_header(response, HCI_READ_BUFFER_SIZE, 5 /* bytes after */); CHECK(stream != NULL); STREAM_TO_UINT16(*data_size_ptr, stream); STREAM_SKIP_UINT8(stream); // skip the sco packet length STREAM_TO_UINT16(*acl_buffer_count_ptr, stream); buffer_allocator->free(response); } static void parse_read_local_version_info_response(BT_HDR* response, bt_version_t* bt_version) { uint8_t* stream = read_command_complete_header( response, HCI_READ_LOCAL_VERSION_INFO, 8 /* bytes after */); CHECK(stream != NULL); STREAM_TO_UINT8(bt_version->hci_version, stream); STREAM_TO_UINT16(bt_version->hci_revision, stream); STREAM_TO_UINT8(bt_version->lmp_version, stream); STREAM_TO_UINT16(bt_version->manufacturer, stream); STREAM_TO_UINT16(bt_version->lmp_subversion, stream); buffer_allocator->free(response); } static void parse_read_local_supported_codecs_response( BT_HDR* response, uint8_t* number_of_local_supported_codecs, uint8_t* local_supported_codecs) { uint8_t* stream = read_command_complete_header( response, HCI_READ_LOCAL_SUPPORTED_CODECS, 0 /* bytes after */); if (stream) { STREAM_TO_UINT8(*number_of_local_supported_codecs, stream); for (uint8_t i = 0; i < *number_of_local_supported_codecs; i++) { STREAM_TO_UINT8(*local_supported_codecs, stream); local_supported_codecs++; } } buffer_allocator->free(response); } static void parse_read_bd_addr_response(BT_HDR* response, RawAddress* address_ptr) { uint8_t* stream = read_command_complete_header( response, HCI_READ_BD_ADDR, RawAddress::kLength /* bytes after */); CHECK(stream != NULL); STREAM_TO_BDADDR(*address_ptr, stream); buffer_allocator->free(response); } static void parse_read_local_supported_commands_response( BT_HDR* response, uint8_t* supported_commands_ptr, size_t supported_commands_length) { uint8_t* stream = read_command_complete_header(response, HCI_READ_LOCAL_SUPPORTED_CMDS, supported_commands_length /* bytes after */); CHECK(stream != NULL); STREAM_TO_ARRAY(supported_commands_ptr, stream, (int)supported_commands_length); buffer_allocator->free(response); } static void parse_read_local_extended_features_response( BT_HDR* response, uint8_t* page_number_ptr, uint8_t* max_page_number_ptr, bt_device_features_t* feature_pages, size_t feature_pages_count) { uint8_t* stream = read_command_complete_header( response, HCI_READ_LOCAL_EXT_FEATURES, 2 + sizeof(bt_device_features_t) /* bytes after */); CHECK(stream != NULL); STREAM_TO_UINT8(*page_number_ptr, stream); STREAM_TO_UINT8(*max_page_number_ptr, stream); CHECK(*page_number_ptr < feature_pages_count); STREAM_TO_ARRAY(feature_pages[*page_number_ptr].as_array, stream, (int)sizeof(bt_device_features_t)); buffer_allocator->free(response); } static void parse_ble_read_white_list_size_response( BT_HDR* response, uint8_t* white_list_size_ptr) { uint8_t* stream = read_command_complete_header( response, HCI_BLE_READ_WHITE_LIST_SIZE, 1 /* byte after */); CHECK(stream != NULL); STREAM_TO_UINT8(*white_list_size_ptr, stream); buffer_allocator->free(response); } static void parse_ble_read_buffer_size_response(BT_HDR* response, uint16_t* data_size_ptr, uint8_t* acl_buffer_count_ptr) { uint8_t* stream = read_command_complete_header( response, HCI_BLE_READ_BUFFER_SIZE, 3 /* bytes after */); CHECK(stream != NULL); STREAM_TO_UINT16(*data_size_ptr, stream); STREAM_TO_UINT8(*acl_buffer_count_ptr, stream); buffer_allocator->free(response); } static void parse_ble_read_supported_states_response( BT_HDR* response, uint8_t* supported_states, size_t supported_states_size) { uint8_t* stream = read_command_complete_header(response, HCI_BLE_READ_SUPPORTED_STATES, supported_states_size /* bytes after */); CHECK(stream != NULL); STREAM_TO_ARRAY(supported_states, stream, (int)supported_states_size); buffer_allocator->free(response); } static void parse_ble_read_local_supported_features_response( BT_HDR* response, bt_device_features_t* supported_features) { uint8_t* stream = read_command_complete_header( response, HCI_BLE_READ_LOCAL_SPT_FEAT, sizeof(bt_device_features_t) /* bytes after */); CHECK(stream != NULL); STREAM_TO_ARRAY(supported_features->as_array, stream, (int)sizeof(bt_device_features_t)); buffer_allocator->free(response); } static void parse_ble_read_resolving_list_size_response( BT_HDR* response, uint8_t* resolving_list_size_ptr) { uint8_t* stream = read_command_complete_header( response, HCI_BLE_READ_RESOLVING_LIST_SIZE, 1 /* bytes after */); STREAM_TO_UINT8(*resolving_list_size_ptr, stream); buffer_allocator->free(response); } static void parse_ble_read_suggested_default_data_length_response( BT_HDR* response, uint16_t* ble_default_packet_length_ptr) { uint8_t* stream = read_command_complete_header( response, HCI_BLE_READ_DEFAULT_DATA_LENGTH, 2 /* bytes after */); STREAM_TO_UINT16(*ble_default_packet_length_ptr, stream); buffer_allocator->free(response); } static void parse_ble_read_maximum_data_length_response( BT_HDR* response, uint16_t* ble_supported_max_tx_octets, uint16_t* ble_supported_max_tx_time, uint16_t* ble_supported_max_rx_octets, uint16_t* ble_supported_max_rx_time) { uint8_t* stream = read_command_complete_header( response, HCI_BLE_READ_MAXIMUM_DATA_LENGTH, 8 /* bytes after */); STREAM_TO_UINT16(*ble_supported_max_tx_octets, stream); STREAM_TO_UINT16(*ble_supported_max_tx_time, stream); STREAM_TO_UINT16(*ble_supported_max_rx_octets, stream); STREAM_TO_UINT16(*ble_supported_max_rx_time, stream); buffer_allocator->free(response); } static void parse_ble_read_maximum_advertising_data_length( BT_HDR* response, uint16_t* ble_maximum_advertising_data_length_ptr) { uint8_t* stream = read_command_complete_header( response, HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH, 2 /* bytes after */); STREAM_TO_UINT16(*ble_maximum_advertising_data_length_ptr, stream); buffer_allocator->free(response); } static void parse_ble_read_number_of_supported_advertising_sets( BT_HDR* response, uint8_t* ble_number_of_supported_advertising_sets_ptr) { uint8_t* stream = read_command_complete_header( response, HCI_LE_READ_NUMBER_OF_SUPPORTED_ADVERTISING_SETS, 1 /* bytes after */); STREAM_TO_UINT8(*ble_number_of_supported_advertising_sets_ptr, stream); buffer_allocator->free(response); } // Internal functions static uint8_t* read_command_complete_header(BT_HDR* response, command_opcode_t expected_opcode, size_t minimum_bytes_after) { uint8_t* stream = response->data + response->offset; // Read the event header uint8_t event_code; uint8_t parameter_length; STREAM_TO_UINT8(event_code, stream); STREAM_TO_UINT8(parameter_length, stream); const size_t parameter_bytes_we_read_here = 4; // Check the event header values against what we expect CHECK(event_code == HCI_COMMAND_COMPLETE_EVT); CHECK(parameter_length >= (parameter_bytes_we_read_here + minimum_bytes_after)); // Read the command complete header command_opcode_t opcode; uint8_t status; STREAM_SKIP_UINT8(stream); // skip the number of hci command packets field STREAM_TO_UINT16(opcode, stream); // Check the command complete header values against what we expect if (expected_opcode != NO_OPCODE_CHECKING) { CHECK(opcode == expected_opcode); } // Assume the next field is the status field STREAM_TO_UINT8(status, stream); if (status != HCI_SUCCESS) { LOG_ERROR("%s: return status - 0x%x", __func__, status); return NULL; } return stream; } static const hci_packet_parser_t interface = { parse_generic_command_complete, parse_read_buffer_size_response, parse_read_local_version_info_response, parse_read_bd_addr_response, parse_read_local_supported_commands_response, parse_read_local_extended_features_response, parse_ble_read_white_list_size_response, parse_ble_read_buffer_size_response, parse_ble_read_supported_states_response, parse_ble_read_local_supported_features_response, parse_ble_read_resolving_list_size_response, parse_ble_read_suggested_default_data_length_response, parse_ble_read_maximum_data_length_response, parse_ble_read_maximum_advertising_data_length, parse_ble_read_number_of_supported_advertising_sets, parse_read_local_supported_codecs_response}; const hci_packet_parser_t* hci_packet_parser_get_interface() { buffer_allocator = buffer_allocator_get_interface(); return &interface; } const hci_packet_parser_t* hci_packet_parser_get_test_interface( allocator_t* buffer_allocator_interface) { buffer_allocator = buffer_allocator_interface; return &interface; }