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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.
#ifndef OSP_IMPL_QUIC_QUIC_SERVER_H_
#define OSP_IMPL_QUIC_QUIC_SERVER_H_
#include <cstdint>
#include <map>
#include <memory>
#include "osp/impl/quic/quic_connection_factory.h"
#include "osp/impl/quic/quic_service_common.h"
#include "osp/public/protocol_connection_server.h"
#include "platform/base/ip_address.h"
namespace openscreen {
// This class is the default implementation of ProtocolConnectionServer for the
// library. It manages connections to other endpoints as well as the lifetime
// of each incoming and outgoing stream. It works in conjunction with a
// QuicConnectionFactory implementation and MessageDemuxer.
// QuicConnectionFactory provides the ability to make a new QUIC
// connection from packets received on its server sockets. Incoming data is
// given to the QuicServer by the underlying QUIC implementation (through
// QuicConnectionFactory) and this is in turn handed to MessageDemuxer for
// routing CBOR messages.
class QuicServer final : public ProtocolConnectionServer,
public QuicConnectionFactory::ServerDelegate,
public ServiceConnectionDelegate::ServiceDelegate {
public:
QuicServer(const ServerConfig& config,
MessageDemuxer* demuxer,
std::unique_ptr<QuicConnectionFactory> connection_factory,
ProtocolConnectionServer::Observer* observer);
~QuicServer() override;
// ProtocolConnectionServer overrides.
bool Start() override;
bool Stop() override;
bool Suspend() override;
bool Resume() override;
void RunTasks() override;
std::unique_ptr<ProtocolConnection> CreateProtocolConnection(
uint64_t endpoint_id) override;
// QuicProtocolConnection::Owner overrides.
void OnConnectionDestroyed(QuicProtocolConnection* connection) override;
// ServiceConnectionDelegate::ServiceDelegate overrides.
uint64_t OnCryptoHandshakeComplete(ServiceConnectionDelegate* delegate,
uint64_t connection_id) override;
void OnIncomingStream(
std::unique_ptr<QuicProtocolConnection> connection) override;
void OnConnectionClosed(uint64_t endpoint_id,
uint64_t connection_id) override;
void OnDataReceived(uint64_t endpoint_id,
uint64_t connection_id,
const uint8_t* data,
size_t data_size) override;
private:
void CloseAllConnections();
// QuicConnectionFactory::ServerDelegate overrides.
QuicConnection::Delegate* NextConnectionDelegate(
const IPEndpoint& source) override;
void OnIncomingConnection(
std::unique_ptr<QuicConnection> connection) override;
const std::vector<IPEndpoint> connection_endpoints_;
std::unique_ptr<QuicConnectionFactory> connection_factory_;
std::unique_ptr<ServiceConnectionDelegate> pending_connection_delegate_;
// Maps an IPEndpoint to a generated endpoint ID. This is used to insulate
// callers from post-handshake changes to a connections actual peer endpoint.
std::map<IPEndpoint, uint64_t, IPEndpointComparator> endpoint_map_;
// Value that will be used for the next new endpoint in a Connect call.
uint64_t next_endpoint_id_ = 0;
// Maps endpoint addresses to data about connections that haven't successfully
// completed the QUIC handshake.
std::map<IPEndpoint, ServiceConnectionData, IPEndpointComparator>
pending_connections_;
// Maps endpoint IDs to data about connections that have successfully
// completed the QUIC handshake.
std::map<uint64_t, ServiceConnectionData> connections_;
// Connections that need to be destroyed, but have to wait for the next event
// loop due to the underlying QUIC implementation's way of referencing them.
std::vector<decltype(connections_)::iterator> delete_connections_;
};
} // namespace openscreen
#endif // OSP_IMPL_QUIC_QUIC_SERVER_H_
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