/******************************************************************************
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*
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* Copyright 2014 Google, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include "btcore/include/property.h"
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#include <base/logging.h>
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#include <string.h>
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#include "btcore/include/device_class.h"
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#include "osi/include/allocator.h"
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#include "osi/include/compat.h"
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using bluetooth::Uuid;
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static bt_property_t* property_new_(void* val, size_t len,
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bt_property_type_t type);
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bt_property_t* property_copy_array(const bt_property_t* properties,
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size_t count) {
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CHECK(properties != NULL);
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bt_property_t* clone =
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static_cast<bt_property_t*>(osi_calloc(sizeof(bt_property_t) * count));
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memcpy(&clone[0], &properties[0], sizeof(bt_property_t) * count);
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for (size_t i = 0; i < count; ++i) {
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clone[i].val = osi_calloc(clone[i].len);
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memcpy(clone[i].val, properties[i].val, clone[i].len);
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}
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return clone;
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}
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bt_property_t* property_copy(bt_property_t* dest, const bt_property_t* src) {
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CHECK(dest != NULL);
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CHECK(src != NULL);
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return (bt_property_t*)memcpy(dest, src, sizeof(bt_property_t));
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}
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bool property_equals(const bt_property_t* p1, const bt_property_t* p2) {
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// Two null properties are not the same. May need to revisit that
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// decision when we have a test case that exercises that condition.
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if (!p1 || !p2 || p1->type != p2->type) {
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return false;
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}
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// Although the Bluetooth name is a 249-byte array, the implementation
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// treats it like a variable-length array with its size specified in the
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// property's `len` field. We special-case the equivalence of BDNAME
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// types here by truncating the larger, zero-padded name to its string
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// length and comparing against the shorter name.
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//
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// Note: it may be the case that both strings are zero-padded but that
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// hasn't come up yet so this implementation doesn't handle it.
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if (p1->type == BT_PROPERTY_BDNAME && p1->len != p2->len) {
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const bt_property_t *shorter = p1, *longer = p2;
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if (p1->len > p2->len) {
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shorter = p2;
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longer = p1;
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}
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return strlen((const char*)longer->val) == (size_t)shorter->len &&
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!memcmp(longer->val, shorter->val, shorter->len);
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}
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return p1->len == p2->len && !memcmp(p1->val, p2->val, p1->len);
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}
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bt_property_t* property_new_addr(const RawAddress* addr) {
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CHECK(addr != NULL);
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return property_new_((void*)addr, sizeof(RawAddress), BT_PROPERTY_BDADDR);
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}
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bt_property_t* property_new_device_class(const bt_device_class_t* dc) {
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CHECK(dc != NULL);
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return property_new_((void*)dc, sizeof(bt_device_class_t),
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BT_PROPERTY_CLASS_OF_DEVICE);
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}
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bt_property_t* property_new_device_type(bt_device_type_t type) {
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return property_new_((void*)&type, sizeof(bt_device_type_t),
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BT_PROPERTY_TYPE_OF_DEVICE);
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}
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bt_property_t* property_new_discovery_timeout(const uint32_t timeout) {
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return property_new_((void*)&timeout, sizeof(uint32_t),
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BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT);
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}
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bt_property_t* property_new_name(const char* name) {
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CHECK(name != NULL);
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return property_new_((void*)name, sizeof(bt_bdname_t), BT_PROPERTY_BDNAME);
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}
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bt_property_t* property_new_rssi(int8_t rssi) {
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return property_new_((void*)&rssi, sizeof(int8_t), BT_PROPERTY_REMOTE_RSSI);
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}
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bt_property_t* property_new_scan_mode(bt_scan_mode_t scan_mode) {
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return property_new_((void*)&scan_mode, sizeof(bt_scan_mode_t),
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BT_PROPERTY_ADAPTER_SCAN_MODE);
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}
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bt_property_t* property_new_uuids(const Uuid* uuid, size_t count) {
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CHECK(uuid != NULL);
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return property_new_((void*)uuid, sizeof(Uuid) * count, BT_PROPERTY_UUIDS);
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}
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void property_free(bt_property_t* property) {
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property_free_array(property, 1);
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}
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void property_free_array(bt_property_t* properties, size_t count) {
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if (properties == NULL) return;
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for (size_t i = 0; i < count; ++i) {
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osi_free(properties[i].val);
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}
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osi_free(properties);
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}
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bool property_is_addr(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_BDADDR;
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}
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bool property_is_device_class(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_CLASS_OF_DEVICE;
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}
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bool property_is_device_type(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_TYPE_OF_DEVICE;
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}
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bool property_is_discovery_timeout(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT;
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}
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bool property_is_name(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_BDNAME;
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}
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bool property_is_rssi(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_REMOTE_RSSI;
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}
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bool property_is_scan_mode(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_ADAPTER_SCAN_MODE;
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}
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bool property_is_uuids(const bt_property_t* property) {
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CHECK(property != NULL);
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return property->type == BT_PROPERTY_UUIDS;
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}
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// Convenience conversion methods to property values
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const RawAddress* property_as_addr(const bt_property_t* property) {
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CHECK(property_is_addr(property));
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return (const RawAddress*)property->val;
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}
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const bt_device_class_t* property_as_device_class(
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const bt_property_t* property) {
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CHECK(property_is_device_class(property));
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return (const bt_device_class_t*)property->val;
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}
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bt_device_type_t property_as_device_type(const bt_property_t* property) {
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CHECK(property_is_device_type(property));
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return *(const bt_device_type_t*)property->val;
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}
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uint32_t property_as_discovery_timeout(const bt_property_t* property) {
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CHECK(property_is_discovery_timeout(property));
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return *(const uint32_t*)property->val;
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}
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const bt_bdname_t* property_as_name(const bt_property_t* property) {
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CHECK(property_is_name(property));
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return (const bt_bdname_t*)property->val;
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}
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int8_t property_as_rssi(const bt_property_t* property) {
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CHECK(property_is_rssi(property));
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return *(const int8_t*)property->val;
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}
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bt_scan_mode_t property_as_scan_mode(const bt_property_t* property) {
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CHECK(property_is_scan_mode(property));
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return *(const bt_scan_mode_t*)property->val;
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}
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const Uuid* property_as_uuids(const bt_property_t* property, size_t* count) {
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CHECK(property_is_uuids(property));
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*count = sizeof(Uuid) / property->len;
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return (const Uuid*)property->val;
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}
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static bt_property_t* property_new_(void* val, size_t len,
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bt_property_type_t type) {
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bt_property_t* property =
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static_cast<bt_property_t*>(osi_calloc(sizeof(bt_property_t)));
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property->val = osi_calloc(len + 1);
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if (type == BT_PROPERTY_BDNAME) {
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strlcpy((char*)property->val, (const char*)val, len);
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} else {
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memcpy(property->val, val, len);
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}
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property->type = type;
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property->len = len;
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return property;
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}
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