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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_P2P_BASE_TCPPORT_H_
#define WEBRTC_P2P_BASE_TCPPORT_H_
#include <list>
#include <string>
#include "webrtc/p2p/base/port.h"
#include "webrtc/base/asyncpacketsocket.h"
namespace cricket {
class TCPConnection;
// Communicates using a local TCP port.
//
// This class is designed to allow subclasses to take advantage of the
// connection management provided by this class. A subclass should take of all
// packet sending and preparation, but when a packet is received, it should
// call this TCPPort::OnReadPacket (3 arg) to dispatch to a connection.
class TCPPort : public Port {
public:
static TCPPort* Create(rtc::Thread* thread,
rtc::PacketSocketFactory* factory,
rtc::Network* network,
const rtc::IPAddress& ip,
uint16_t min_port,
uint16_t max_port,
const std::string& username,
const std::string& password,
bool allow_listen) {
TCPPort* port = new TCPPort(thread, factory, network, ip, min_port,
max_port, username, password, allow_listen);
if (!port->Init()) {
delete port;
port = NULL;
}
return port;
}
virtual ~TCPPort();
virtual Connection* CreateConnection(const Candidate& address,
CandidateOrigin origin);
virtual void PrepareAddress();
virtual int GetOption(rtc::Socket::Option opt, int* value);
virtual int SetOption(rtc::Socket::Option opt, int value);
virtual int GetError();
virtual bool SupportsProtocol(const std::string& protocol) const {
return protocol == TCP_PROTOCOL_NAME || protocol == SSLTCP_PROTOCOL_NAME;
}
protected:
TCPPort(rtc::Thread* thread,
rtc::PacketSocketFactory* factory,
rtc::Network* network,
const rtc::IPAddress& ip,
uint16_t min_port,
uint16_t max_port,
const std::string& username,
const std::string& password,
bool allow_listen);
bool Init();
// Handles sending using the local TCP socket.
virtual int SendTo(const void* data, size_t size,
const rtc::SocketAddress& addr,
const rtc::PacketOptions& options,
bool payload);
// Accepts incoming TCP connection.
void OnNewConnection(rtc::AsyncPacketSocket* socket,
rtc::AsyncPacketSocket* new_socket);
private:
struct Incoming {
rtc::SocketAddress addr;
rtc::AsyncPacketSocket* socket;
};
rtc::AsyncPacketSocket* GetIncoming(
const rtc::SocketAddress& addr, bool remove = false);
// Receives packet signal from the local TCP Socket.
void OnReadPacket(rtc::AsyncPacketSocket* socket,
const char* data, size_t size,
const rtc::SocketAddress& remote_addr,
const rtc::PacketTime& packet_time);
void OnReadyToSend(rtc::AsyncPacketSocket* socket);
void OnAddressReady(rtc::AsyncPacketSocket* socket,
const rtc::SocketAddress& address);
// TODO: Is this still needed?
bool incoming_only_;
bool allow_listen_;
rtc::AsyncPacketSocket* socket_;
int error_;
std::list<Incoming> incoming_;
friend class TCPConnection;
};
class TCPConnection : public Connection {
public:
// Connection is outgoing unless socket is specified
TCPConnection(TCPPort* port, const Candidate& candidate,
rtc::AsyncPacketSocket* socket = 0);
virtual ~TCPConnection();
virtual int Send(const void* data, size_t size,
const rtc::PacketOptions& options);
virtual int GetError();
rtc::AsyncPacketSocket* socket() { return socket_.get(); }
void OnMessage(rtc::Message* pmsg);
// Allow test cases to overwrite the default timeout period.
int reconnection_timeout() const { return reconnection_timeout_; }
void set_reconnection_timeout(int timeout_in_ms) {
reconnection_timeout_ = timeout_in_ms;
}
protected:
enum {
MSG_TCPCONNECTION_DELAYED_ONCLOSE = Connection::MSG_FIRST_AVAILABLE,
};
// Set waiting_for_stun_binding_complete_ to false to allow data packets in
// addition to what Port::OnConnectionRequestResponse does.
virtual void OnConnectionRequestResponse(ConnectionRequest* req,
StunMessage* response);
private:
// Helper function to handle the case when Ping or Send fails with error
// related to socket close.
void MaybeReconnect();
void CreateOutgoingTcpSocket();
void ConnectSocketSignals(rtc::AsyncPacketSocket* socket);
void OnConnect(rtc::AsyncPacketSocket* socket);
void OnClose(rtc::AsyncPacketSocket* socket, int error);
void OnReadPacket(rtc::AsyncPacketSocket* socket,
const char* data, size_t size,
const rtc::SocketAddress& remote_addr,
const rtc::PacketTime& packet_time);
void OnReadyToSend(rtc::AsyncPacketSocket* socket);
rtc::scoped_ptr<rtc::AsyncPacketSocket> socket_;
int error_;
bool outgoing_;
// Guard against multiple outgoing tcp connection during a reconnect.
bool connection_pending_;
// Guard against data packets sent when we reconnect a TCP connection. During
// reconnecting, when a new tcp connection has being made, we can't send data
// packets out until the STUN binding is completed (i.e. the write state is
// set to WRITABLE again by Connection::OnConnectionRequestResponse). IPC
// socket, when receiving data packets before that, will trigger OnError which
// will terminate the newly created connection.
bool pretending_to_be_writable_;
// Allow test case to overwrite the default timeout period.
int reconnection_timeout_;
friend class TCPPort;
};
} // namespace cricket
#endif // WEBRTC_P2P_BASE_TCPPORT_H_
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