1 /*
2 * Copyright (c) 2021-2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "netlink/netlink_manager.h"
17
18 #include <cerrno>
19 #include <fcntl.h>
20 #include <iostream>
21 #include <sys/socket.h>
22 #include <unistd.h>
23 #include <linux/netlink.h>
24
25 #include "securec.h"
26 #include "storage_service_errno.h"
27 #include "storage_service_log.h"
28
29 namespace OHOS {
30 namespace StorageDaemon {
31 NetlinkManager* NetlinkManager::instance_ = nullptr;
32
Instance()33 NetlinkManager* NetlinkManager::Instance()
34 {
35 if (instance_ == nullptr) {
36 instance_ = new NetlinkManager();
37 }
38
39 return instance_;
40 }
41
Start()42 int32_t NetlinkManager::Start()
43 {
44 struct sockaddr_nl addr;
45 int32_t bufferSize = 256 * ONE_KB;
46 int32_t passCred = 1;
47
48 (void)memset_s(&addr, sizeof(addr), 0, sizeof(addr));
49 addr.nl_family = AF_NETLINK;
50 addr.nl_pid = static_cast<uint32_t>(getprocpid());
51 addr.nl_groups = 0xffffffff;
52
53 socketFd_ = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT);
54 if (socketFd_ < 0) {
55 LOGE("Create netlink socket failed, errno %{public}d", errno);
56 return E_ERR;
57 }
58
59 if (setsockopt(socketFd_, SOL_SOCKET, SO_RCVBUFFORCE, &bufferSize, sizeof(bufferSize)) != 0) {
60 LOGE("Set SO_RCVBUFFORCE failed, errno %{public}d", errno);
61 (void)close(socketFd_);
62 return E_ERR;
63 }
64
65 if (setsockopt(socketFd_, SOL_SOCKET, SO_PASSCRED, &passCred, sizeof(passCred)) != 0) {
66 LOGE("Set SO_PASSCRED failed, errno %{public}d", errno);
67 (void)close(socketFd_);
68 return E_ERR;
69 }
70
71 if (bind(socketFd_, reinterpret_cast<struct sockaddr *>(&addr), sizeof(addr)) != 0) {
72 LOGE("Socket bind failed, errno %{public}d", errno);
73 (void)close(socketFd_);
74 return E_ERR;
75 }
76
77 nlHandler_ = new NetlinkHandler(socketFd_);
78 if (nlHandler_->Start()) {
79 (void)close(socketFd_);
80 return E_ERR;
81 }
82 return E_OK;
83 }
84
Stop()85 int32_t NetlinkManager::Stop()
86 {
87 int32_t ret = 0;
88 if (nlHandler_ != nullptr) {
89 if (nlHandler_->Stop()) {
90 ret = E_ERR;
91 }
92 delete nlHandler_;
93 }
94 nlHandler_ = nullptr;
95 (void)close(socketFd_);
96 socketFd_ = -1;
97
98 return ret;
99 }
100 } // StorageDaemon
101 } // OHOS
102