| /****************************************************************************** |
| * |
| * Copyright (C) 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. |
| * |
| ******************************************************************************/ |
| |
| #include <assert.h> |
| #include <string.h> |
| #include "btcore/include/bdaddr.h" |
| #include "btcore/include/device_class.h" |
| #include "btcore/include/property.h" |
| #include "btcore/include/uuid.h" |
| #include "osi/include/allocator.h" |
| |
| static bt_property_t *property_new_(void *val, size_t len, bt_property_type_t type); |
| |
| bt_property_t *property_copy_array(const bt_property_t *properties, size_t count) { |
| assert(properties != NULL); |
| bt_property_t *clone = osi_calloc(sizeof(bt_property_t) * count); |
| if (!clone) { |
| return NULL; |
| } |
| |
| memcpy(&clone[0], &properties[0], sizeof(bt_property_t) * count); |
| for (size_t i = 0; i < count; ++i) { |
| clone[i].val = osi_calloc(clone[i].len); |
| memcpy(clone[i].val, properties[i].val, clone[i].len); |
| } |
| |
| return clone; |
| } |
| |
| bt_property_t *property_copy(bt_property_t *dest, const bt_property_t *src) { |
| assert(dest != NULL); |
| assert(src != NULL); |
| return (bt_property_t *)memcpy(dest, src, sizeof(bt_property_t)); |
| } |
| |
| bool property_equals(const bt_property_t *p1, const bt_property_t *p2) { |
| // Two null properties are not the same. May need to revisit that |
| // decision when we have a test case that exercises that condition. |
| if (!p1 || !p2 || p1->type != p2->type) { |
| return false; |
| } |
| |
| // Although the Bluetooth name is a 249-byte array, the implementation |
| // treats it like a variable-length array with its size specified in the |
| // property's `len` field. We special-case the equivalence of BDNAME |
| // types here by truncating the larger, zero-padded name to its string |
| // length and comparing against the shorter name. |
| // |
| // Note: it may be the case that both strings are zero-padded but that |
| // hasn't come up yet so this implementation doesn't handle it. |
| if (p1->type == BT_PROPERTY_BDNAME && p1->len != p2->len) { |
| const bt_property_t *shorter = p1, *longer = p2; |
| if (p1->len > p2->len) { |
| shorter = p2; |
| longer = p1; |
| } |
| return strlen((const char *)longer->val) == (size_t)shorter->len && !memcmp(longer->val, shorter->val, shorter->len); |
| } |
| |
| return p1->len == p2->len && !memcmp(p1->val, p2->val, p1->len); |
| } |
| |
| bt_property_t *property_new_addr(const bt_bdaddr_t *addr) { |
| assert(addr != NULL); |
| return property_new_((void *)addr, sizeof(bt_bdaddr_t), BT_PROPERTY_BDADDR); |
| } |
| |
| bt_property_t *property_new_device_class(const bt_device_class_t *dc) { |
| assert(dc != NULL); |
| return property_new_((void *)dc, sizeof(bt_device_class_t), BT_PROPERTY_CLASS_OF_DEVICE); |
| } |
| |
| bt_property_t *property_new_device_type(bt_device_type_t type) { |
| return property_new_((void *)&type, sizeof(bt_device_type_t), BT_PROPERTY_TYPE_OF_DEVICE); |
| } |
| |
| bt_property_t *property_new_discovery_timeout(const uint32_t timeout) { |
| return property_new_((void *)&timeout, sizeof(uint32_t), BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT); |
| } |
| |
| bt_property_t *property_new_name(const char *name) { |
| assert(name != NULL); |
| return property_new_((void *)name, sizeof(bt_bdname_t), BT_PROPERTY_BDNAME); |
| } |
| |
| bt_property_t *property_new_rssi(int8_t rssi) { |
| return property_new_((void *)&rssi, sizeof(int8_t), BT_PROPERTY_REMOTE_RSSI); |
| } |
| |
| bt_property_t *property_new_scan_mode(bt_scan_mode_t scan_mode) { |
| return property_new_((void *)&scan_mode, sizeof(bt_scan_mode_t), BT_PROPERTY_ADAPTER_SCAN_MODE); |
| } |
| |
| bt_property_t *property_new_uuids(const bt_uuid_t *uuid, size_t count) { |
| assert(uuid != NULL); |
| return property_new_((void *)uuid, sizeof(bt_uuid_t) * count, BT_PROPERTY_UUIDS); |
| } |
| |
| void property_free(bt_property_t *property) { |
| property_free_array(property, 1); |
| } |
| |
| void property_free_array(bt_property_t *properties, size_t count) { |
| if (properties == NULL) |
| return; |
| |
| for (size_t i = 0; i < count; ++i) { |
| osi_free(properties[i].val); |
| } |
| |
| osi_free(properties); |
| } |
| |
| bool property_is_addr(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_BDADDR; |
| } |
| |
| bool property_is_device_class(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_CLASS_OF_DEVICE; |
| } |
| |
| bool property_is_device_type(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_TYPE_OF_DEVICE; |
| } |
| |
| bool property_is_discovery_timeout(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT; |
| } |
| |
| bool property_is_name(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_BDNAME; |
| } |
| |
| bool property_is_rssi(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_REMOTE_RSSI; |
| } |
| |
| bool property_is_scan_mode(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_ADAPTER_SCAN_MODE; |
| } |
| |
| bool property_is_uuids(const bt_property_t *property) { |
| assert(property != NULL); |
| return property->type == BT_PROPERTY_UUIDS; |
| } |
| |
| // Convenience conversion methods to property values |
| const bt_bdaddr_t *property_as_addr(const bt_property_t *property) { |
| assert(property_is_addr(property)); |
| return (const bt_bdaddr_t *)property->val; |
| } |
| |
| const bt_device_class_t *property_as_device_class(const bt_property_t *property) { |
| assert(property_is_device_class(property)); |
| return (const bt_device_class_t *)property->val; |
| } |
| |
| bt_device_type_t property_as_device_type(const bt_property_t *property) { |
| assert(property_is_device_type(property)); |
| return *(const bt_device_type_t *)property->val; |
| } |
| |
| uint32_t property_as_discovery_timeout(const bt_property_t *property) { |
| assert(property_is_discovery_timeout(property)); |
| return *(const uint32_t *)property->val; |
| } |
| |
| const bt_bdname_t *property_as_name(const bt_property_t *property) { |
| assert(property_is_name(property)); |
| return (const bt_bdname_t *)property->val; |
| } |
| |
| int8_t property_as_rssi(const bt_property_t *property) { |
| assert(property_is_rssi(property)); |
| return *(const int8_t *)property->val; |
| } |
| |
| bt_scan_mode_t property_as_scan_mode(const bt_property_t *property) { |
| assert(property_is_scan_mode(property)); |
| return *(const bt_scan_mode_t *)property->val; |
| } |
| |
| const bt_uuid_t *property_as_uuids(const bt_property_t *property, size_t *count) { |
| assert(property_is_uuids(property)); |
| *count = sizeof(bt_uuid_t) / property->len; |
| return (const bt_uuid_t *)property->val; |
| } |
| |
| static bt_property_t *property_new_(void *val, size_t len, bt_property_type_t type) { |
| bt_property_t *property = osi_calloc(sizeof(bt_property_t)); |
| assert(property != NULL); |
| |
| property->val = osi_malloc(len); |
| assert(property->val != NULL); |
| |
| memcpy(property->val, val, len); |
| |
| property->type = type; |
| property->len = len; |
| |
| return property; |
| } |