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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/dbus/dbus_external_service.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop_proxy.h"
#include "dbus/bus.h"
#include "dbus/exported_object.h"
#include "dbus/file_descriptor.h"
#include "dbus/message.h"
#include "dbus/object_path.h"
#include "mojo/common/channel_init.h"
#include "mojo/public/cpp/bindings/error_handler.h"
#include "mojo/public/cpp/bindings/remote_ptr.h"
#include "mojo/public/cpp/shell/application.h"
#include "mojo/public/interfaces/shell/shell.mojom.h"
#include "mojo/shell/external_service.mojom.h"
namespace mojo {
DBusExternalServiceBase::DBusExternalServiceBase(
const std::string& service_name)
: service_name_(service_name),
exported_object_(NULL) {
}
DBusExternalServiceBase::~DBusExternalServiceBase() {}
void DBusExternalServiceBase::Start() {
InitializeDBus();
ExportMethods();
TakeDBusServiceOwnership();
DVLOG(1) << "External service started";
}
void DBusExternalServiceBase::OnError() {
Disconnect();
}
void DBusExternalServiceBase::ConnectChannel(
dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender sender) {
dbus::MessageReader reader(method_call);
dbus::FileDescriptor wrapped_fd;
if (!reader.PopFileDescriptor(&wrapped_fd)) {
sender.Run(
dbus::ErrorResponse::FromMethodCall(
method_call,
"org.chromium.Mojo.BadHandle",
"Invalid FD.").PassAs<dbus::Response>());
return;
}
wrapped_fd.CheckValidity();
channel_init_.reset(new mojo::common::ChannelInit);
mojo::ScopedMessagePipeHandle message_pipe =
channel_init_->Init(wrapped_fd.TakeValue(),
base::MessageLoopProxy::current());
CHECK(message_pipe.is_valid());
Connect(mojo::ScopedExternalServiceHostHandle::From(message_pipe.Pass()));
sender.Run(dbus::Response::FromMethodCall(method_call));
}
void DBusExternalServiceBase::ExportMethods() {
CHECK(exported_object_);
CHECK(exported_object_->ExportMethodAndBlock(
kMojoDBusInterface, kMojoDBusConnectMethod,
base::Bind(&DBusExternalServiceBase::ConnectChannel,
base::Unretained(this))));
}
void DBusExternalServiceBase::InitializeDBus() {
CHECK(!bus_);
dbus::Bus::Options options;
options.bus_type = dbus::Bus::SESSION;
bus_ = new dbus::Bus(options);
CHECK(bus_->Connect());
CHECK(bus_->SetUpAsyncOperations());
exported_object_ =
bus_->GetExportedObject(dbus::ObjectPath(kMojoDBusImplPath));
}
void DBusExternalServiceBase::TakeDBusServiceOwnership() {
CHECK(bus_->RequestOwnershipAndBlock(
service_name_,
dbus::Bus::REQUIRE_PRIMARY_ALLOW_REPLACEMENT))
<< "Unable to take ownership of " << service_name_;
}
} // namespace mojo
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