2 * Copyright (C) 2016 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
22 #include <android-base/logging.h>
23 #include <android-base/macros.h>
24 #include <binder/IPCThreadState.h>
25 #include <binder/IServiceManager.h>
26 #include <binder/ProcessState.h>
27 #include <cutils/properties.h>
28 #include <utils/String16.h>
30 #include "ipc_constants.h"
31 #include "looper_backed_event_loop.h"
34 using android::net::wifi::IWificond;
35 using android::wificond::ipc_constants::kDevModePropertyKey;
36 using android::wificond::ipc_constants::kDevModeServiceName;
37 using android::wificond::ipc_constants::kServiceName;
41 class ScopedSignalHandler final {
43 ScopedSignalHandler(android::wificond::LooperBackedEventLoop* event_loop) {
44 if (s_event_loop_ != nullptr) {
45 LOG(FATAL) << "Only instantiate one signal handler per process!";
47 s_event_loop_ = event_loop;
48 std::signal(SIGINT, &ScopedSignalHandler::LeaveLoop);
49 std::signal(SIGTERM, &ScopedSignalHandler::LeaveLoop);
52 ~ScopedSignalHandler() {
53 std::signal(SIGINT, SIG_DFL);
54 std::signal(SIGTERM, SIG_DFL);
55 s_event_loop_ = nullptr;
59 static android::wificond::LooperBackedEventLoop* s_event_loop_;
60 static void LeaveLoop(int signal) {
61 if (s_event_loop_ != nullptr) {
62 s_event_loop_->TriggerExit();
66 DISALLOW_COPY_AND_ASSIGN(ScopedSignalHandler);
69 android::wificond::LooperBackedEventLoop*
70 ScopedSignalHandler::s_event_loop_ = nullptr;
73 // Setup our interface to the Binder driver or die trying.
74 int SetupBinderOrCrash() {
76 android::ProcessState::self()->setThreadPoolMaxThreadCount(0);
77 android::IPCThreadState::self()->disableBackgroundScheduling(true);
78 int err = android::IPCThreadState::self()->setupPolling(&binder_fd);
79 CHECK_EQ(err, 0) << "Error setting up binder polling: " << strerror(-err);
80 CHECK_GE(binder_fd, 0) << "Invalid binder FD: " << binder_fd;
84 void RegisterServiceOrCrash(const android::sp<android::IBinder>& service) {
85 android::sp<android::IServiceManager> sm = android::defaultServiceManager();
86 CHECK_EQ(sm != NULL, true) << "Could not obtain IServiceManager";
88 const int8_t dev_mode_on = property_get_bool(kDevModePropertyKey, 0);
89 const char* service_name = (dev_mode_on) ? kDevModeServiceName : kServiceName;
90 CHECK_EQ(sm->addService(android::String16(service_name), service),
96 void OnBinderReadReady(int fd) {
97 android::IPCThreadState::self()->handlePolledCommands();
100 int main(int argc, char** argv) {
101 android::base::InitLogging(argv, android::base::LogdLogger(android::base::SYSTEM));
102 LOG(INFO) << "wificond is starting up...";
104 std::unique_ptr<android::wificond::LooperBackedEventLoop> event_dispatcher(
105 new android::wificond::LooperBackedEventLoop());
106 ScopedSignalHandler scoped_signal_handler(event_dispatcher.get());
108 int binder_fd = SetupBinderOrCrash();
109 CHECK(event_dispatcher->WatchFileDescriptor(
111 android::wificond::EventLoop::kModeInput,
112 &OnBinderReadReady)) << "Failed to watch binder FD";
114 android::sp<android::IBinder> server = new android::wificond::Server();
115 RegisterServiceOrCrash(server);
117 event_dispatcher->Poll();
118 LOG(INFO) << "wificond is about to exit";