| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <stdint.h> |
| #include <type_traits> |
| #include <vector> |
| |
| #include <linux/netlink.h> |
| |
| class NetlinkMessage { |
| public: |
| NetlinkMessage() = default; |
| NetlinkMessage(uint16_t type, uint32_t sequence); |
| NetlinkMessage(const char* data, size_t size); |
| |
| template<typename T, |
| typename = std::enable_if_t<std::is_pod<T>::value>> |
| bool getAttribute(int attributeId, T* value) const { |
| return getAttribute(attributeId, value, sizeof(T)); |
| } |
| |
| uint16_t type() const; |
| uint32_t sequence() const; |
| |
| nlmsghdr* header() { |
| return reinterpret_cast<nlmsghdr*>(mData.data()); |
| } |
| const nlmsghdr* header() const { |
| return reinterpret_cast<const nlmsghdr*>(mData.data()); |
| } |
| |
| template<typename T> |
| T* payload() { |
| return reinterpret_cast<T*>(NLMSG_DATA(header())); |
| } |
| template<typename T> |
| const T* payload() const { |
| return reinterpret_cast<T*>(NLMSG_DATA(header())); |
| } |
| |
| const uint8_t* data() const { return mData.data(); } |
| size_t size() const { return mData.size(); } |
| private: |
| NetlinkMessage(const NetlinkMessage&) = delete; |
| NetlinkMessage& operator=(const NetlinkMessage&) = delete; |
| |
| bool getAttribute(int attributeId, void* data, size_t size) const; |
| bool findAttribute(int attributeId, |
| const void** value, |
| uint16_t* size) const; |
| |
| std::vector<uint8_t> mData; |
| }; |
| |