1 /*
2 * Copyright 2019, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "netlink_message.h"
18
19 #include <netlink/genl/genl.h>
20 #include <netlink/msg.h>
21
NetlinkMessage()22 NetlinkMessage::NetlinkMessage() {
23 }
24
NetlinkMessage(NetlinkMessage && other)25 NetlinkMessage::NetlinkMessage(NetlinkMessage&& other) {
26 std::swap(mMessage, other.mMessage);
27 }
28
~NetlinkMessage()29 NetlinkMessage::~NetlinkMessage() {
30 if (mMessage) {
31 nlmsg_free(mMessage);
32 mMessage = nullptr;
33 }
34 }
35
operator =(NetlinkMessage && other)36 NetlinkMessage& NetlinkMessage::operator=(NetlinkMessage&& other) {
37 if (mMessage) {
38 nlmsg_free(mMessage);
39 mMessage = nullptr;
40 }
41 std::swap(mMessage, other.mMessage);
42 return *this;
43 }
44
initGeneric(int family,uint8_t command,int version)45 bool NetlinkMessage::initGeneric(int family, uint8_t command, int version) {
46 if (mMessage) {
47 return false;
48 }
49
50 mMessage = nlmsg_alloc();
51 if (!mMessage) {
52 return false;
53 }
54
55 return genlmsg_put(mMessage, NL_AUTO_PORT, NL_AUTO_SEQ, family, 0,
56 NLM_F_REQUEST, command, version) != nullptr;
57 }
58
getSeqNum() const59 uint32_t NetlinkMessage::getSeqNum() const {
60 return nlmsg_hdr(mMessage)->nlmsg_seq;
61 }
62