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// Copyright 2018 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 "osp/impl/quic/testing/fake_quic_connection_factory.h"
#include <algorithm>
#include <memory>
#include "util/logging.h"
namespace openscreen {
namespace osp {
FakeQuicConnectionFactoryBridge::FakeQuicConnectionFactoryBridge(
const IPEndpoint& controller_endpoint)
: controller_endpoint_(controller_endpoint) {}
void FakeQuicConnectionFactoryBridge::OnConnectionClosed(
QuicConnection* connection) {
if (connection == connections_.controller) {
connections_.controller = nullptr;
return;
} else if (connection == connections_.receiver) {
connections_.receiver = nullptr;
return;
}
OSP_DCHECK(false) << "reporting an unknown connection as closed";
}
void FakeQuicConnectionFactoryBridge::OnOutgoingStream(
QuicConnection* connection,
QuicStream* stream) {
FakeQuicConnection* remote_connection = nullptr;
if (connection == connections_.controller) {
remote_connection = connections_.receiver;
} else if (connection == connections_.receiver) {
remote_connection = connections_.controller;
}
if (remote_connection) {
remote_connection->delegate()->OnIncomingStream(
remote_connection->id(), remote_connection->MakeIncomingStream());
}
}
void FakeQuicConnectionFactoryBridge::SetServerDelegate(
QuicConnectionFactory::ServerDelegate* delegate,
const IPEndpoint& endpoint) {
OSP_DCHECK(!delegate_ || !delegate);
delegate_ = delegate;
receiver_endpoint_ = endpoint;
}
void FakeQuicConnectionFactoryBridge::RunTasks(bool is_client) {
bool* idle_flag = is_client ? &client_idle_ : &server_idle_;
*idle_flag = true;
if (!connections_.controller || !connections_.receiver) {
return;
}
if (connections_pending_) {
*idle_flag = false;
connections_.receiver->delegate()->OnCryptoHandshakeComplete(
connections_.receiver->id());
connections_.controller->delegate()->OnCryptoHandshakeComplete(
connections_.controller->id());
connections_pending_ = false;
return;
}
const size_t num_streams = connections_.controller->streams().size();
OSP_CHECK_EQ(num_streams, connections_.receiver->streams().size());
auto stream_it_pair =
std::make_pair(connections_.controller->streams().begin(),
connections_.receiver->streams().begin());
for (size_t i = 0; i < num_streams; ++i) {
auto* controller_stream = stream_it_pair.first->second;
auto* receiver_stream = stream_it_pair.second->second;
std::vector<uint8_t> written_data = controller_stream->TakeWrittenData();
OSP_DCHECK(controller_stream->TakeReceivedData().empty());
if (!written_data.empty()) {
*idle_flag = false;
receiver_stream->delegate()->OnReceived(
receiver_stream, reinterpret_cast<const char*>(written_data.data()),
written_data.size());
}
written_data = receiver_stream->TakeWrittenData();
OSP_DCHECK(receiver_stream->TakeReceivedData().empty());
if (written_data.size()) {
*idle_flag = false;
controller_stream->delegate()->OnReceived(
controller_stream, reinterpret_cast<const char*>(written_data.data()),
written_data.size());
}
// Close the read end for closed write ends
if (controller_stream->write_end_closed()) {
receiver_stream->CloseReadEnd();
}
if (receiver_stream->write_end_closed()) {
controller_stream->CloseReadEnd();
}
if (controller_stream->both_ends_closed() &&
receiver_stream->both_ends_closed()) {
controller_stream->delegate()->OnClose(controller_stream->id());
receiver_stream->delegate()->OnClose(receiver_stream->id());
controller_stream->delegate()->OnReceived(controller_stream, nullptr, 0);
receiver_stream->delegate()->OnReceived(receiver_stream, nullptr, 0);
stream_it_pair.first =
connections_.controller->streams().erase(stream_it_pair.first);
stream_it_pair.second =
connections_.receiver->streams().erase(stream_it_pair.second);
} else {
// The stream pair must always be advanced at the same time.
++stream_it_pair.first;
++stream_it_pair.second;
}
}
}
std::unique_ptr<QuicConnection> FakeQuicConnectionFactoryBridge::Connect(
const IPEndpoint& endpoint,
QuicConnection::Delegate* connection_delegate) {
if (endpoint != receiver_endpoint_) {
return nullptr;
}
OSP_DCHECK(!connections_.controller);
OSP_DCHECK(!connections_.receiver);
auto controller_connection = std::make_unique<FakeQuicConnection>(
this, next_connection_id_++, connection_delegate);
connections_.controller = controller_connection.get();
auto receiver_connection = std::make_unique<FakeQuicConnection>(
this, next_connection_id_++,
delegate_->NextConnectionDelegate(controller_endpoint_));
connections_.receiver = receiver_connection.get();
delegate_->OnIncomingConnection(std::move(receiver_connection));
return controller_connection;
}
FakeClientQuicConnectionFactory::FakeClientQuicConnectionFactory(
FakeQuicConnectionFactoryBridge* bridge)
: bridge_(bridge) {}
FakeClientQuicConnectionFactory::~FakeClientQuicConnectionFactory() = default;
void FakeClientQuicConnectionFactory::SetServerDelegate(
ServerDelegate* delegate,
const std::vector<IPEndpoint>& endpoints) {
OSP_DCHECK(false) << "don't call SetServerDelegate from QuicClient side";
}
std::unique_ptr<QuicConnection> FakeClientQuicConnectionFactory::Connect(
const IPEndpoint& endpoint,
QuicConnection::Delegate* connection_delegate) {
return bridge_->Connect(endpoint, connection_delegate);
}
void FakeClientQuicConnectionFactory::OnError(UdpSocket* socket, Error error) {
OSP_UNIMPLEMENTED();
}
void FakeClientQuicConnectionFactory::OnSendError(UdpSocket* socket,
Error error) {
OSP_UNIMPLEMENTED();
}
void FakeClientQuicConnectionFactory::OnRead(UdpSocket* socket,
ErrorOr<UdpPacket> packet) {
bridge_->RunTasks(true);
idle_ = bridge_->client_idle();
}
FakeServerQuicConnectionFactory::FakeServerQuicConnectionFactory(
FakeQuicConnectionFactoryBridge* bridge)
: bridge_(bridge) {}
FakeServerQuicConnectionFactory::~FakeServerQuicConnectionFactory() = default;
void FakeServerQuicConnectionFactory::SetServerDelegate(
ServerDelegate* delegate,
const std::vector<IPEndpoint>& endpoints) {
if (delegate) {
OSP_DCHECK_EQ(1u, endpoints.size())
<< "fake bridge doesn't support multiple server endpoints";
}
bridge_->SetServerDelegate(delegate,
endpoints.empty() ? IPEndpoint{} : endpoints[0]);
}
std::unique_ptr<QuicConnection> FakeServerQuicConnectionFactory::Connect(
const IPEndpoint& endpoint,
QuicConnection::Delegate* connection_delegate) {
OSP_DCHECK(false) << "don't call Connect() from QuicServer side";
return nullptr;
}
void FakeServerQuicConnectionFactory::OnError(UdpSocket* socket, Error error) {
OSP_UNIMPLEMENTED();
}
void FakeServerQuicConnectionFactory::OnSendError(UdpSocket* socket,
Error error) {
OSP_UNIMPLEMENTED();
}
void FakeServerQuicConnectionFactory::OnRead(UdpSocket* socket,
ErrorOr<UdpPacket> packet) {
bridge_->RunTasks(false);
idle_ = bridge_->server_idle();
}
} // namespace osp
} // namespace openscreen
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