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// Copyright 2015 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 <signal.h>
#include <sysexits.h>
#include <string>
#include <base/command_line.h>
#include <base/files/file_util.h>
#ifdef __ANDROID__
#include <binderwrapper/binder_wrapper.h>
#include <brillo/binder_watcher.h>
#include <brillo/daemons/daemon.h>
#else
#include <brillo/dbus/async_event_sequencer.h>
#include <brillo/dbus/exported_object_manager.h>
#include <brillo/daemons/dbus_daemon.h>
#endif // __ANDROID__
#include <brillo/flag_helper.h>
#include <brillo/syslog_logging.h>
#ifdef __ANDROID__
#include "webservd/binder_server.h"
#include "webserv_common/binder_constants.h"
#else
#include "webservd/server.h"
#endif
#include "webservd/config.h"
#include "webservd/log_manager.h"
#include "webservd/utils.h"
#if defined(__ANDROID__)
#include <firewalld/firewall.h>
#else
#include "webservd/permission_broker_firewall.h"
using FirewallImpl = webservd::PermissionBrokerFirewall;
#endif // defined(__ANDROID__)
#ifdef __ANDROID__
using BaseDaemon = brillo::Daemon;
#else
using brillo::dbus_utils::AsyncEventSequencer;
using BaseDaemon = brillo::DBusServiceDaemon;
#endif // __ANDROID__
namespace {
const char kDefaultConfigFilePath[] = "/etc/webservd/config";
#ifndef __ANDROID__
const char kServiceName[] = "org.chromium.WebServer";
const char kRootServicePath[] = "/org/chromium/WebServer";
const char kWebServerUserName[] = "webservd";
const char kWebServerGroupName[] = "webservd";
#endif // !defined(__ANDROID__)
class Daemon final : public BaseDaemon {
public:
#ifdef __ANDROID__
explicit Daemon(webservd::Config config)
: config_{std::move(config)} {}
#else
explicit Daemon(webservd::Config config)
: DBusServiceDaemon{kServiceName, kRootServicePath},
config_{std::move(config)} {}
#endif // __ANDROID__
protected:
#ifndef __ANDROID__
void RegisterDBusObjectsAsync(AsyncEventSequencer* sequencer) override {
webservd::LogManager::Init(base::FilePath{config_.log_directory});
server_.reset(new webservd::Server{
object_manager_.get(), config_,
std::unique_ptr<webservd::FirewallInterface>{new FirewallImpl()}});
server_->RegisterAsync(
sequencer->GetHandler("Server.RegisterAsync() failed.", true));
}
void OnShutdown(int* /* return_code */) override {
server_.reset();
}
#endif // !__ANDROID__
private:
#ifdef __ANDROID__
int OnInit() override {
int result = brillo::Daemon::OnInit();
if (result != EX_OK) {
return result;
}
webservd::LogManager::Init(base::FilePath{config_.log_directory});
android::BinderWrapper::Create();
if (!binder_watcher_.Init()) {
return EX_OSERR;
}
server_.reset(new webservd::BinderServer(config_,
android::BinderWrapper::Get()));
if (!android::BinderWrapper::Get()->RegisterService(
webservd::kWebserverBinderServiceName,
server_.get())) {
return EX_OSERR;
}
return EX_OK;
}
#endif // __ANDROID__
webservd::Config config_;
#ifdef __ANDROID__
std::unique_ptr<webservd::BinderServer> server_;
brillo::BinderWatcher binder_watcher_;
#else
std::unique_ptr<webservd::Server> server_;
#endif // __ANDROID__
DISALLOW_COPY_AND_ASSIGN(Daemon);
};
} // namespace
int main(int argc, char* argv[]) {
DEFINE_bool(log_to_stderr, false, "log trace messages to stderr as well");
DEFINE_string(config_path, "",
"path to a file containing server configuration");
DEFINE_bool(debug, false,
"return debug error information in web requests");
DEFINE_bool(ipv6, true, "enable IPv6 support");
brillo::FlagHelper::Init(argc, argv, "Brillo web server daemon");
// From libmicrohttpd documentation, section 1.5 SIGPIPE:
// ... portable code using MHD must install a SIGPIPE handler or explicitly
// block the SIGPIPE signal.
// This also applies to using pipes over D-Bus to pass request/response data
// to/from remote request handlers. We handle errors from write operations on
// sockets/pipes correctly, so SIGPIPE is just a pest.
signal(SIGPIPE, SIG_IGN);
int flags = brillo::kLogToSyslog;
if (FLAGS_log_to_stderr)
flags |= brillo::kLogToStderr;
brillo::InitLog(flags | brillo::kLogHeader);
webservd::Config config;
config.use_ipv6 = FLAGS_ipv6;
base::FilePath default_file_path{kDefaultConfigFilePath};
if (!FLAGS_config_path.empty()) {
// In tests, we'll override the board specific and default configurations
// with a test specific configuration.
webservd::LoadConfigFromFile(base::FilePath{FLAGS_config_path}, &config);
} else if (base::PathExists(default_file_path)) {
// Some boards have a configuration they will want to use to override
// our defaults. Part of our interface is to look for this in a
// standard location.
CHECK(webservd::LoadConfigFromFile(default_file_path, &config));
} else {
webservd::LoadDefaultConfig(&config);
}
// For protocol handlers bound to specific network interfaces, we need root
// access to create those bound sockets.
for (auto& handler_config : config.protocol_handlers) {
if (!handler_config.interface_name.empty()) {
int socket_fd =
webservd::CreateNetworkInterfaceSocket(handler_config.interface_name);
if (socket_fd < 0) {
LOG(ERROR) << "Failed to create a socket for network interface "
<< handler_config.interface_name;
return EX_SOFTWARE;
}
handler_config.socket_fd = socket_fd;
}
}
config.use_debug = FLAGS_debug;
Daemon daemon{std::move(config)};
return daemon.Run();
}
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