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// Copyright (c) 2012 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.
//
// An implementation of the QuicClientBase::NetworkHelper
// that is based off the epoll server.
#ifndef NET_TOOLS_QUIC_QUIC_CLIENT_EPOLL_NETWORK_HELPER_H_
#define NET_TOOLS_QUIC_QUIC_CLIENT_EPOLL_NETWORK_HELPER_H_
#include <cstdint>
#include <memory>
#include <string>
#include "base/command_line.h"
#include "base/macros.h"
#include "net/quic/core/quic_client_push_promise_index.h"
#include "net/quic/core/quic_config.h"
#include "net/quic/core/quic_spdy_stream.h"
#include "net/quic/platform/api/quic_containers.h"
#include "net/tools/epoll_server/epoll_server.h"
#include "net/tools/quic/quic_client_base.h"
#include "net/tools/quic/quic_packet_reader.h"
#include "net/tools/quic/quic_process_packet_interface.h"
#include "net/tools/quic/quic_spdy_client_base.h"
#include "net/tools/quic/quic_spdy_client_session.h"
namespace net {
namespace test {
class QuicClientPeer;
} // namespace test
// An implementation of the QuicClientBase::NetworkHelper based off
// the epoll server.
class QuicClientEpollNetworkHelper : public QuicClientBase::NetworkHelper,
public EpollCallbackInterface,
public ProcessPacketInterface {
public:
// Create a quic client, which will have events managed by an externally owned
// EpollServer.
QuicClientEpollNetworkHelper(EpollServer* epoll_server,
QuicClientBase* client);
~QuicClientEpollNetworkHelper() override;
// From EpollCallbackInterface
void OnRegistration(EpollServer* eps, int fd, int event_mask) override;
void OnModification(int fd, int event_mask) override;
void OnEvent(int fd, EpollEvent* event) override;
// |fd_| can be unregistered without the client being disconnected. This
// happens in b3m QuicProber where we unregister |fd_| to feed in events to
// the client from the SelectServer.
void OnUnregistration(int fd, bool replaced) override;
void OnShutdown(EpollServer* eps, int fd) override;
// From ProcessPacketInterface. This will be called for each received
// packet.
void ProcessPacket(const QuicSocketAddress& self_address,
const QuicSocketAddress& peer_address,
const QuicReceivedPacket& packet) override;
// From NetworkHelper.
void RunEventLoop() override;
bool CreateUDPSocketAndBind(QuicSocketAddress server_address,
QuicIpAddress bind_to_address,
int bind_to_port) override;
void CleanUpAllUDPSockets() override;
QuicSocketAddress GetLatestClientAddress() const override;
QuicPacketWriter* CreateQuicPacketWriter() override;
// Accessors provided for convenience, not part of any interface.
EpollServer* epoll_server() { return epoll_server_; }
const QuicLinkedHashMap<int, QuicSocketAddress>& fd_address_map() const {
return fd_address_map_;
}
// If the client has at least one UDP socket, return the latest created one.
// Otherwise, return -1.
int GetLatestFD() const;
QuicClientBase* client() { return client_; }
void set_max_reads_per_epoll_loop(int num_reads) {
max_reads_per_epoll_loop_ = num_reads;
}
private:
friend class test::QuicClientPeer;
// Used for testing.
void SetClientPort(int port);
// If |fd| is an open UDP socket, unregister and close it. Otherwise, do
// nothing.
void CleanUpUDPSocket(int fd);
// Actually clean up |fd|.
void CleanUpUDPSocketImpl(int fd);
// Listens for events on the client socket.
EpollServer* epoll_server_;
// Map mapping created UDP sockets to their addresses. By using linked hash
// map, the order of socket creation can be recorded.
QuicLinkedHashMap<int, QuicSocketAddress> fd_address_map_;
// If overflow_supported_ is true, this will be the number of packets dropped
// during the lifetime of the server.
QuicPacketCount packets_dropped_;
// True if the kernel supports SO_RXQ_OVFL, the number of packets dropped
// because the socket would otherwise overflow.
bool overflow_supported_;
// Point to a QuicPacketReader object on the heap. The reader allocates more
// space than allowed on the stack.
std::unique_ptr<QuicPacketReader> packet_reader_;
QuicClientBase* client_;
int max_reads_per_epoll_loop_;
DISALLOW_COPY_AND_ASSIGN(QuicClientEpollNetworkHelper);
};
} // namespace net
#endif // NET_TOOLS_QUIC_QUIC_CLIENT_EPOLL_NETWORK_HELPER_H_