/****************************************************************************** * * Copyright (C) 2015 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_device_interop" #include <assert.h> #include <string.h> // For memcmp #include "btcore/include/module.h" #include "device/include/interop.h" #include "device/include/interop_database.h" #include "osi/include/allocator.h" #include "osi/include/list.h" #include "osi/include/log.h" #define CASE_RETURN_STR(const) case const: return #const; static list_t *interop_list = NULL; static const char* interop_feature_string_(const interop_feature_t feature); static void interop_free_entry_(void *data); static void interop_lazy_init_(void); static bool interop_match_fixed_(const interop_feature_t feature, const bt_bdaddr_t *addr); static bool interop_match_dynamic_(const interop_feature_t feature, const bt_bdaddr_t *addr); // Interface functions bool interop_match_addr(const interop_feature_t feature, const bt_bdaddr_t *addr) { assert(addr); if (interop_match_fixed_(feature, addr) || interop_match_dynamic_(feature, addr)) { char bdstr[20] = {0}; LOG_WARN(LOG_TAG, "%s() Device %s is a match for interop workaround %s.", __func__, bdaddr_to_string(addr, bdstr, sizeof(bdstr)), interop_feature_string_(feature)); return true; } return false; } bool interop_match_name(const interop_feature_t feature, const char *name) { assert(name); const size_t db_size = sizeof(interop_name_database) / sizeof(interop_name_entry_t); for (size_t i = 0; i != db_size; ++i) { if (feature == interop_name_database[i].feature && strlen(name) >= interop_name_database[i].length && strncmp(name, interop_name_database[i].name, interop_name_database[i].length) == 0) { return true; } } return false; } void interop_database_add(const uint16_t feature, const bt_bdaddr_t *addr, size_t length) { assert(addr); assert(length > 0); assert(length < sizeof(bt_bdaddr_t)); interop_addr_entry_t *entry = osi_calloc(sizeof(interop_addr_entry_t)); memcpy(&entry->addr, addr, length); entry->feature = feature; entry->length = length; interop_lazy_init_(); list_append(interop_list, entry); } void interop_database_clear() { if (interop_list) list_clear(interop_list); } // Module life-cycle functions static future_t *interop_clean_up(void) { list_free(interop_list); interop_list = NULL; return future_new_immediate(FUTURE_SUCCESS); } EXPORT_SYMBOL module_t interop_module = { .name = INTEROP_MODULE, .init = NULL, .start_up = NULL, .shut_down = NULL, .clean_up = interop_clean_up, .dependencies = {NULL}, }; // Local functions static const char* interop_feature_string_(const interop_feature_t feature) { switch (feature) { CASE_RETURN_STR(INTEROP_DISABLE_LE_SECURE_CONNECTIONS) CASE_RETURN_STR(INTEROP_AUTO_RETRY_PAIRING) CASE_RETURN_STR(INTEROP_DISABLE_ABSOLUTE_VOLUME) CASE_RETURN_STR(INTEROP_DISABLE_AUTO_PAIRING) CASE_RETURN_STR(INTEROP_KEYBOARD_REQUIRES_FIXED_PIN) CASE_RETURN_STR(INTEROP_2MBPS_LINK_ONLY) } return "UNKNOWN"; } static void interop_free_entry_(void *data) { interop_addr_entry_t *entry = (interop_addr_entry_t *)data; osi_free(entry); } static void interop_lazy_init_(void) { if (interop_list == NULL) { interop_list = list_new(interop_free_entry_); } } static bool interop_match_dynamic_(const interop_feature_t feature, const bt_bdaddr_t *addr) { if (interop_list == NULL || list_length(interop_list) == 0) return false; const list_node_t *node = list_begin(interop_list); while (node != list_end(interop_list)) { interop_addr_entry_t *entry = list_node(node); assert(entry); if (feature == entry->feature && memcmp(addr, &entry->addr, entry->length) == 0) return true; node = list_next(node); } return false; } static bool interop_match_fixed_(const interop_feature_t feature, const bt_bdaddr_t *addr) { assert(addr); const size_t db_size = sizeof(interop_addr_database) / sizeof(interop_addr_entry_t); for (size_t i = 0; i != db_size; ++i) { if (feature == interop_addr_database[i].feature && memcmp(addr, &interop_addr_database[i].addr, interop_addr_database[i].length) == 0) { return true; } } return false; }