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// Copyright 2015 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/public/cpp/bindings/lib/control_message_proxy.h"
#include <stddef.h>
#include <stdint.h>
#include <utility>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/macros.h"
#include "base/run_loop.h"
#include "mojo/public/cpp/bindings/lib/message_builder.h"
#include "mojo/public/cpp/bindings/lib/serialization.h"
#include "mojo/public/cpp/bindings/lib/validation_util.h"
#include "mojo/public/cpp/bindings/message.h"
#include "mojo/public/interfaces/bindings/interface_control_messages.mojom.h"
namespace mojo {
namespace internal {
namespace {
bool ValidateControlResponse(Message* message) {
ValidationContext validation_context(message->payload(),
message->payload_num_bytes(), 0, 0,
message, "ControlResponseValidator");
if (!ValidateMessageIsResponse(message, &validation_context))
return false;
switch (message->header()->name) {
case interface_control::kRunMessageId:
return ValidateMessagePayload<
interface_control::internal::RunResponseMessageParams_Data>(
message, &validation_context);
}
return false;
}
using RunCallback =
base::Callback<void(interface_control::RunResponseMessageParamsPtr)>;
class RunResponseForwardToCallback : public MessageReceiver {
public:
explicit RunResponseForwardToCallback(const RunCallback& callback)
: callback_(callback) {}
bool Accept(Message* message) override;
private:
RunCallback callback_;
DISALLOW_COPY_AND_ASSIGN(RunResponseForwardToCallback);
};
bool RunResponseForwardToCallback::Accept(Message* message) {
if (!ValidateControlResponse(message))
return false;
interface_control::internal::RunResponseMessageParams_Data* params =
reinterpret_cast<
interface_control::internal::RunResponseMessageParams_Data*>(
message->mutable_payload());
interface_control::RunResponseMessageParamsPtr params_ptr;
SerializationContext context;
Deserialize<interface_control::RunResponseMessageParamsDataView>(
params, ¶ms_ptr, &context);
callback_.Run(std::move(params_ptr));
return true;
}
void SendRunMessage(MessageReceiverWithResponder* receiver,
interface_control::RunInputPtr input_ptr,
const RunCallback& callback) {
SerializationContext context;
auto params_ptr = interface_control::RunMessageParams::New();
params_ptr->input = std::move(input_ptr);
size_t size = PrepareToSerialize<interface_control::RunMessageParamsDataView>(
params_ptr, &context);
MessageBuilder builder(interface_control::kRunMessageId,
Message::kFlagExpectsResponse, size, 0);
interface_control::internal::RunMessageParams_Data* params = nullptr;
Serialize<interface_control::RunMessageParamsDataView>(
params_ptr, builder.buffer(), ¶ms, &context);
std::unique_ptr<MessageReceiver> responder =
base::MakeUnique<RunResponseForwardToCallback>(callback);
ignore_result(
receiver->AcceptWithResponder(builder.message(), std::move(responder)));
}
Message ConstructRunOrClosePipeMessage(
interface_control::RunOrClosePipeInputPtr input_ptr) {
SerializationContext context;
auto params_ptr = interface_control::RunOrClosePipeMessageParams::New();
params_ptr->input = std::move(input_ptr);
size_t size = PrepareToSerialize<
interface_control::RunOrClosePipeMessageParamsDataView>(params_ptr,
&context);
MessageBuilder builder(interface_control::kRunOrClosePipeMessageId, 0, size,
0);
interface_control::internal::RunOrClosePipeMessageParams_Data* params =
nullptr;
Serialize<interface_control::RunOrClosePipeMessageParamsDataView>(
params_ptr, builder.buffer(), ¶ms, &context);
return std::move(*builder.message());
}
void SendRunOrClosePipeMessage(
MessageReceiverWithResponder* receiver,
interface_control::RunOrClosePipeInputPtr input_ptr) {
Message message(ConstructRunOrClosePipeMessage(std::move(input_ptr)));
ignore_result(receiver->Accept(&message));
}
void RunVersionCallback(
const base::Callback<void(uint32_t)>& callback,
interface_control::RunResponseMessageParamsPtr run_response) {
uint32_t version = 0u;
if (run_response->output && run_response->output->is_query_version_result())
version = run_response->output->get_query_version_result()->version;
callback.Run(version);
}
void RunClosure(const base::Closure& callback,
interface_control::RunResponseMessageParamsPtr run_response) {
callback.Run();
}
} // namespace
ControlMessageProxy::ControlMessageProxy(MessageReceiverWithResponder* receiver)
: receiver_(receiver) {
}
ControlMessageProxy::~ControlMessageProxy() = default;
void ControlMessageProxy::QueryVersion(
const base::Callback<void(uint32_t)>& callback) {
auto input_ptr = interface_control::RunInput::New();
input_ptr->set_query_version(interface_control::QueryVersion::New());
SendRunMessage(receiver_, std::move(input_ptr),
base::Bind(&RunVersionCallback, callback));
}
void ControlMessageProxy::RequireVersion(uint32_t version) {
auto require_version = interface_control::RequireVersion::New();
require_version->version = version;
auto input_ptr = interface_control::RunOrClosePipeInput::New();
input_ptr->set_require_version(std::move(require_version));
SendRunOrClosePipeMessage(receiver_, std::move(input_ptr));
}
void ControlMessageProxy::FlushForTesting() {
if (encountered_error_)
return;
auto input_ptr = interface_control::RunInput::New();
input_ptr->set_flush_for_testing(interface_control::FlushForTesting::New());
base::RunLoop run_loop;
run_loop_quit_closure_ = run_loop.QuitClosure();
SendRunMessage(
receiver_, std::move(input_ptr),
base::Bind(&RunClosure,
base::Bind(&ControlMessageProxy::RunFlushForTestingClosure,
base::Unretained(this))));
run_loop.Run();
}
void ControlMessageProxy::RunFlushForTestingClosure() {
DCHECK(!run_loop_quit_closure_.is_null());
base::ResetAndReturn(&run_loop_quit_closure_).Run();
}
void ControlMessageProxy::OnConnectionError() {
encountered_error_ = true;
if (!run_loop_quit_closure_.is_null())
RunFlushForTestingClosure();
}
} // namespace internal
} // namespace mojo
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