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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2011-2014 ZeroTier Networks LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#ifndef ZT_SOCKET_HPP
#define ZT_SOCKET_HPP
#include "Constants.hpp"
#include "InetAddress.hpp"
#include "AtomicCounter.hpp"
#include "SharedPtr.hpp"
#include "NonCopyable.hpp"
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <Windows.h>
#endif
/**
* Maximum discrete message length supported by all socket types
*/
#define ZT_SOCKET_MAX_MESSAGE_LEN 2048
namespace ZeroTier {
class Socket;
class SocketManager;
/**
* Base class of all socket types
*
* Socket implementations are tightly bound to SocketManager.
*/
class Socket : NonCopyable
{
friend class SocketManager;
friend class SharedPtr<Socket>;
public:
enum Type
{
ZT_SOCKET_TYPE_UDP_V4,
ZT_SOCKET_TYPE_UDP_V6,
ZT_SOCKET_TYPE_TCP_IN, // incoming connection, not listen
ZT_SOCKET_TYPE_TCP_OUT
};
virtual ~Socket() {}
/**
* @return Socket type
*/
inline Type type() const
throw()
{
return _type;
}
/**
* @return True if this is a UDP socket
*/
inline bool udp() const
throw()
{
return ((_type == ZT_SOCKET_TYPE_UDP_V4)||(_type == ZT_SOCKET_TYPE_UDP_V6));
}
/**
* @return True if this is a TCP socket
*/
inline bool tcp() const
throw()
{
return ((_type == ZT_SOCKET_TYPE_TCP_IN)||(_type == ZT_SOCKET_TYPE_TCP_OUT));
}
/**
* Send a ZeroTier message packet
*
* @param to Destination address (ignored in connected TCP sockets)
* @param msg Message data
* @param msglen Message length (max 16384 bytes)
* @return True if send appears successful on our end, false if e.g. address type unreachable from this socket
*/
virtual bool send(const InetAddress &to,const void *msg,unsigned int msglen) = 0;
protected:
#ifdef __WINDOWS__
Socket(Type t,SOCKET s) :
#else
Socket(Type t,int s) :
#endif
_sock(s),
_type(t) {}
// Called only by SocketManager, should return false if socket is no longer open/valid (e.g. connection drop or other fatal error)
virtual bool notifyAvailableForRead(const SharedPtr<Socket> &self,SocketManager *sm) = 0;
virtual bool notifyAvailableForWrite(const SharedPtr<Socket> &self,SocketManager *sm) = 0;
#ifdef __WINDOWS__
SOCKET _sock;
#else
int _sock;
#endif
Type _type;
AtomicCounter __refCount;
};
} // namespace ZeroTier
#endif
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