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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 "trunks/trunks_binder_service.h"
#include <sysexits.h>
#include <base/bind.h>
#include <binderwrapper/binder_wrapper.h>
#include "trunks/binder_interface.h"
#include "trunks/command_transceiver.h"
#include "trunks/error_codes.h"
#include "trunks/interface.pb.h"
namespace {
// If |command| is a valid command protobuf, provides the |command_data| and
// returns true. Otherwise, returns false.
bool ParseCommandProto(const std::vector<int8_t>& command,
std::string* command_data) {
trunks::SendCommandRequest request_proto;
if (!request_proto.ParseFromArray(command.data(), command.size()) ||
!request_proto.has_command() || request_proto.command().empty()) {
return false;
}
*command_data = request_proto.command();
return true;
}
void CreateResponseProto(const std::string& data,
std::vector<int8_t>* response) {
trunks::SendCommandResponse response_proto;
response_proto.set_response(data);
response->resize(response_proto.ByteSize());
CHECK(response_proto.SerializeToArray(response->data(), response->size()))
<< "TrunksBinderService: Failed to serialize protobuf.";
}
} // namespace
namespace trunks {
int TrunksBinderService::OnInit() {
android::BinderWrapper::Create();
if (!watcher_.Init()) {
LOG(ERROR) << "TrunksBinderService: BinderWatcher::Init failed.";
return EX_UNAVAILABLE;
}
binder_ = new BinderServiceInternal(this);
if (!android::BinderWrapper::Get()->RegisterService(
kTrunksServiceName, android::IInterface::asBinder(binder_))) {
LOG(ERROR) << "TrunksBinderService: RegisterService failed.";
return EX_UNAVAILABLE;
}
LOG(INFO) << "Trunks: Binder service registered.";
return brillo::Daemon::OnInit();
}
TrunksBinderService::BinderServiceInternal::BinderServiceInternal(
TrunksBinderService* service)
: service_(service) {}
android::binder::Status TrunksBinderService::BinderServiceInternal::SendCommand(
const std::vector<int8_t>& command,
const android::sp<android::trunks::ITrunksClient>& client) {
auto callback =
base::Bind(&TrunksBinderService::BinderServiceInternal::OnResponse,
GetWeakPtr(), client);
std::string command_data;
if (!ParseCommandProto(command, &command_data)) {
LOG(ERROR) << "TrunksBinderService: Bad command data.";
callback.Run(CreateErrorResponse(SAPI_RC_BAD_PARAMETER));
return android::binder::Status::ok();
}
service_->transceiver_->SendCommand(command_data, callback);
return android::binder::Status::ok();
}
void TrunksBinderService::BinderServiceInternal::OnResponse(
const android::sp<android::trunks::ITrunksClient>& client,
const std::string& response) {
std::vector<int8_t> binder_response;
CreateResponseProto(response, &binder_response);
android::binder::Status status = client->OnCommandResponse(binder_response);
if (!status.isOk()) {
LOG(ERROR) << "TrunksBinderService: Failed to send response to client: "
<< status.toString8();
}
}
android::binder::Status
TrunksBinderService::BinderServiceInternal::SendCommandAndWait(
const std::vector<int8_t>& command,
std::vector<int8_t>* response) {
std::string command_data;
if (!ParseCommandProto(command, &command_data)) {
LOG(ERROR) << "TrunksBinderService: Bad command data.";
CreateResponseProto(CreateErrorResponse(SAPI_RC_BAD_PARAMETER), response);
return android::binder::Status::ok();
}
CreateResponseProto(service_->transceiver_->SendCommandAndWait(command_data),
response);
return android::binder::Status::ok();
}
} // namespace trunks
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