1 /*
2 * Copyright (C) 2022 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 #define LOG_TAG "RemoteAccessImpl"
18
19 #include "RemoteAccessService.h"
20
21 #include "BindToDeviceSocketMutator.h"
22
23 #include <android-base/logging.h>
24 #include <android/binder_manager.h>
25 #include <android/binder_process.h>
26 #include <grpcpp/create_channel.h>
27 #include <libnetdevice/libnetdevice.h>
28 #include <stdlib.h>
29
30 namespace {
31
32 constexpr char GRPC_SERVICE_CONFIG_FILE[] = "/vendor/etc/automotive/powercontroller/serverconfig";
33 constexpr char SERVICE_NAME[] = "android.hardware.automotive.remoteaccess.IRemoteAccess/default";
34
maybeGetGrpcServiceInfo(std::string * address,std::string * ifname)35 void maybeGetGrpcServiceInfo(std::string* address, std::string* ifname) {
36 std::ifstream ifs(GRPC_SERVICE_CONFIG_FILE);
37 if (!ifs) {
38 LOG(INFO) << "Cannot open grpc service config file at: " << GRPC_SERVICE_CONFIG_FILE
39 << ", assume no service is available";
40 return;
41 }
42 int count = 0;
43 while (ifs.good()) {
44 std::string line;
45 ifs >> line;
46 // First line is address, second line, if present is ifname.
47 if (count == 0) {
48 *address = line;
49 } else {
50 *ifname = line;
51 break;
52 }
53 count++;
54 }
55 ifs.close();
56 }
57
58 } // namespace
59
main(int,char * [])60 int main(int /* argc */, char* /* argv */[]) {
61 std::string grpcServiceAddress = "";
62 std::string grpcServiceIfname = "";
63 maybeGetGrpcServiceInfo(&grpcServiceAddress, &grpcServiceIfname);
64
65 std::unique_ptr<android::hardware::automotive::remoteaccess::WakeupClient::Stub> grpcStub;
66
67 if (grpcServiceAddress != "") {
68 LOG(INFO) << "Registering RemoteAccessService as service, server: " << grpcServiceAddress
69 << "...";
70 grpc::ChannelArguments grpcargs = {};
71
72 if (grpcServiceIfname != "") {
73 grpcargs.SetSocketMutator(
74 android::hardware::automotive::remoteaccess::MakeBindToDeviceSocketMutator(
75 grpcServiceIfname));
76 LOG(DEBUG) << "grpcServiceIfname specified as: " << grpcServiceIfname;
77 LOG(INFO) << "Waiting for interface: " << grpcServiceIfname;
78 android::netdevice::waitFor({grpcServiceIfname},
79 android::netdevice::WaitCondition::PRESENT_AND_UP);
80 LOG(INFO) << "Waiting for interface: " << grpcServiceIfname << " done";
81 }
82 auto channel = grpc::CreateChannel(grpcServiceAddress, grpc::InsecureChannelCredentials());
83 grpcStub = android::hardware::automotive::remoteaccess::WakeupClient::NewStub(channel);
84 } else {
85 LOG(INFO) << "grpcServiceAddress is not defined, work in fake mode";
86 }
87
88 auto service = ndk::SharedRefBase::make<
89 android::hardware::automotive::remoteaccess::RemoteAccessService>(grpcStub.get());
90
91 binder_exception_t err = AServiceManager_addService(service->asBinder().get(), SERVICE_NAME);
92 if (err != EX_NONE) {
93 LOG(ERROR) << "failed to register android.hardware.automotive.remote.IRemoteAccess service"
94 << ", exception: " << err;
95 exit(1);
96 }
97
98 if (!ABinderProcess_setThreadPoolMaxThreadCount(1)) {
99 LOG(ERROR) << "failed to set thread pool max thread count";
100 exit(1);
101 }
102 ABinderProcess_startThreadPool();
103
104 LOG(INFO) << "RemoteAccess service Ready";
105
106 ABinderProcess_joinThreadPool();
107
108 LOG(ERROR) << "Should not reach here";
109
110 return 0;
111 }
112