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/*
* Copyright (C) 2016 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.
*/
#include <unistd.h>
#include <sys/capability.h>
#include <csignal>
#include <memory>
#include <android-base/logging.h>
#include <android-base/macros.h>
#include <binder/IPCThreadState.h>
#include <binder/IServiceManager.h>
#include <binder/ProcessState.h>
#include <cutils/properties.h>
#include <libminijail.h>
#include <utils/String16.h>
#include <wifi_system/interface_tool.h>
#include "wificond/ipc_constants.h"
#include "wificond/looper_backed_event_loop.h"
#include "wificond/net/netlink_manager.h"
#include "wificond/net/netlink_utils.h"
#include "wificond/scanning/scan_utils.h"
#include "wificond/server.h"
#include "wifi_keystore_hal_connector.h"
using android::net::wifi::nl80211::IWificond;
using android::wifi_system::InterfaceTool;
using android::wificond::ipc_constants::kServiceName;
using android::wificond::WifiKeystoreHalConnector;
using std::unique_ptr;
namespace {
class ScopedSignalHandler final {
public:
ScopedSignalHandler(android::wificond::LooperBackedEventLoop* event_loop) {
if (s_event_loop_ != nullptr) {
LOG(FATAL) << "Only instantiate one signal handler per process!";
}
s_event_loop_ = event_loop;
std::signal(SIGINT, &ScopedSignalHandler::LeaveLoop);
std::signal(SIGTERM, &ScopedSignalHandler::LeaveLoop);
}
~ScopedSignalHandler() {
std::signal(SIGINT, SIG_DFL);
std::signal(SIGTERM, SIG_DFL);
s_event_loop_ = nullptr;
}
private:
static android::wificond::LooperBackedEventLoop* s_event_loop_;
static void LeaveLoop(int signal) {
if (s_event_loop_ != nullptr) {
s_event_loop_->TriggerExit();
}
}
DISALLOW_COPY_AND_ASSIGN(ScopedSignalHandler);
};
android::wificond::LooperBackedEventLoop*
ScopedSignalHandler::s_event_loop_ = nullptr;
// Setup our interface to the Binder driver or die trying.
int SetupBinderOrCrash() {
int binder_fd = -1;
android::ProcessState::self()->setThreadPoolMaxThreadCount(0);
android::IPCThreadState::self()->disableBackgroundScheduling(true);
int err = android::IPCThreadState::self()->setupPolling(&binder_fd);
CHECK_EQ(err, 0) << "Error setting up binder polling: " << strerror(-err);
CHECK_GE(binder_fd, 0) << "Invalid binder FD: " << binder_fd;
return binder_fd;
}
void RegisterServiceOrCrash(const android::sp<android::IBinder>& service) {
android::sp<android::IServiceManager> sm = android::defaultServiceManager();
CHECK_EQ(sm != NULL, true) << "Could not obtain IServiceManager";
CHECK_EQ(sm->addService(android::String16(kServiceName), service),
android::NO_ERROR);
}
} // namespace
void OnBinderReadReady(int fd) {
android::IPCThreadState::self()->handlePolledCommands();
}
int main(int argc, char** argv) {
android::base::InitLogging(argv, android::base::LogdLogger(android::base::SYSTEM));
LOG(INFO) << "wificond is starting up...";
unique_ptr<android::wificond::LooperBackedEventLoop> event_dispatcher(
new android::wificond::LooperBackedEventLoop());
ScopedSignalHandler scoped_signal_handler(event_dispatcher.get());
int binder_fd = SetupBinderOrCrash();
CHECK(event_dispatcher->WatchFileDescriptor(
binder_fd,
android::wificond::EventLoop::kModeInput,
&OnBinderReadReady)) << "Failed to watch binder FD";
android::wificond::NetlinkManager netlink_manager(event_dispatcher.get());
if (!netlink_manager.Start()) {
LOG(ERROR) << "Failed to start netlink manager";
}
android::wificond::NetlinkUtils netlink_utils(&netlink_manager);
android::wificond::ScanUtils scan_utils(&netlink_manager);
android::sp<android::wificond::Server> server(new android::wificond::Server(
unique_ptr<InterfaceTool>(new InterfaceTool),
&netlink_utils,
&scan_utils));
RegisterServiceOrCrash(server);
WifiKeystoreHalConnector keystore_connector;
keystore_connector.start();
event_dispatcher->Poll();
LOG(INFO) << "wificond is about to exit";
return 0;
}
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