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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/dbus/arc_crosh_service_provider.h"
#include <memory>
#include <string>
#include <utility>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/memory/scoped_refptr.h"
#include "chromeos/ash/components/dbus/arc/arc.pb.h"
#include "chromeos/ash/experiences/arc/mojom/crosh.mojom.h"
#include "chromeos/ash/experiences/arc/session/arc_bridge_service.h"
#include "chromeos/ash/experiences/arc/session/arc_service_manager.h"
#include "components/user_manager/user_manager.h"
#include "dbus/exported_object.h"
#include "dbus/message.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace ash {
ArcCroshServiceProvider::ArcCroshServiceProvider() = default;
ArcCroshServiceProvider::~ArcCroshServiceProvider() = default;
void ArcCroshServiceProvider::Start(
scoped_refptr<dbus::ExportedObject> exported_object) {
exported_object->ExportMethod(
arc::crosh::kArcCroshInterfaceName, arc::crosh::kArcCroshRequest,
base::BindRepeating(&ArcCroshServiceProvider::Request,
weak_ptr_factory_.GetWeakPtr()),
base::BindOnce(&ArcCroshServiceProvider::OnExported,
weak_ptr_factory_.GetWeakPtr()));
}
void ArcCroshServiceProvider::Request(
dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender) {
dbus::MessageReader reader(method_call);
arc::ArcShellExecutionRequest request;
if (!reader.PopArrayOfBytesAsProto(&request)) {
LOG(ERROR)
<< "Failed to parse incoming message as ArcShellExecutionRequest";
std::move(response_sender)
.Run(dbus::ErrorResponse::FromMethodCall(
method_call, DBUS_ERROR_INVALID_ARGS,
"No ArcShellExecutionRequest in message"));
return;
}
if (!request.has_command()) {
LOG(WARNING) << "ArcShellExecutionRequest.command is empty";
std::move(response_sender)
.Run(dbus::ErrorResponse::FromMethodCall(
method_call, DBUS_ERROR_INVALID_ARGS,
"command should not be empty"));
return;
}
arc::mojom::ArcShellCommand command;
switch (request.command()) {
case arc::ArcShellExecutionRequest_ArcShellCommand::
ArcShellExecutionRequest_ArcShellCommand_TOP:
command = arc::mojom::ArcShellCommand::kTop;
break;
case arc::ArcShellExecutionRequest_ArcShellCommand::
ArcShellExecutionRequest_ArcShellCommand_CPUINFO:
command = arc::mojom::ArcShellCommand::kCpuinfo;
break;
case arc::ArcShellExecutionRequest_ArcShellCommand::
ArcShellExecutionRequest_ArcShellCommand_MEMINFO:
command = arc::mojom::ArcShellCommand::kMeminfo;
break;
default:
LOG(FATAL) << "Not supported shell command requested: "
<< request.command();
}
arc::mojom::ArcShellExecutionRequestPtr mojo_request =
arc::mojom::ArcShellExecutionRequest::New(command);
if (!request.has_user_id()) {
LOG(WARNING) << "request.user_id is empty";
std::move(response_sender)
.Run(dbus::ErrorResponse::FromMethodCall(
method_call, DBUS_ERROR_INVALID_ARGS,
"user_id should not be empty"));
return;
}
user_manager::UserManager* user_manager = user_manager::UserManager::Get();
std::string requesting_user = request.user_id();
if (requesting_user != user_manager->GetPrimaryUser()->username_hash()) {
LOG(WARNING) << "Requesting user is not primary user";
std::move(response_sender)
.Run(dbus::ErrorResponse::FromMethodCall(
method_call, DBUS_ERROR_ACCESS_DENIED,
"Request from not primary user is prohibited"));
return;
}
arc::mojom::ArcShellExecutionInstance* mojo_instance =
ARC_GET_INSTANCE_FOR_METHOD(arc::ArcServiceManager::Get()
->arc_bridge_service()
->arc_shell_execution(),
Exec);
if (!mojo_instance) {
LOG(ERROR) << "Failed to get connection with ArcCroshService";
std::move(response_sender)
.Run(dbus::ErrorResponse::FromMethodCall(
method_call, DBUS_ERROR_FAILED,
"Failed to get connection with ArcCroshService. "
"You can make ARCVM running from starting ARC apps, "
"e.g. Play Store"));
return;
}
std::unique_ptr<dbus::Response> response =
dbus::Response::FromMethodCall(method_call);
mojo_instance->Exec(
std::move(mojo_request),
base::BindOnce(&ArcCroshServiceProvider::SendResponse,
weak_ptr_factory_.GetWeakPtr(), std::move(response),
std::move(response_sender)));
}
void ArcCroshServiceProvider::SendResponse(
std::unique_ptr<dbus::Response> response,
dbus::ExportedObject::ResponseSender response_sender,
arc::mojom::ArcShellExecutionResultPtr got_mojo_result) {
arc::ArcShellExecutionResult sending_dbus_result;
// Only `error` field has a value if the execution fails.
if (got_mojo_result->is_error()) {
sending_dbus_result.set_error(got_mojo_result->get_error());
} else {
sending_dbus_result.set_stdout(got_mojo_result->get_stdout());
}
dbus::MessageWriter writer(response.get());
writer.AppendProtoAsArrayOfBytes(sending_dbus_result);
std::move(response_sender).Run(std::move(response));
}
void ArcCroshServiceProvider::OnExported(const std::string& interface_name,
const std::string& method_name,
bool success) {
if (!success) {
LOG(ERROR) << "Failed to export " << interface_name << "." << method_name;
}
}
} // namespace ash
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