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/*******************************************************************************
* shroudBNC - an object-oriented framework for IRC *
* Copyright (C) 2005-2014 Gunnar Beutner *
* *
* 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 2 *
* 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, write to the Free Software *
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
*******************************************************************************/
#ifndef LISTENER_H
#define LISTENER_H
/**
* CListenerBase<InheritedClass>
*
* Implements a generic socket listener.
*/
template<typename InheritedClass>
class CListenerBase : public CSocketEvents {
private:
SOCKET m_Listener; /**< the listening socket */
virtual int Read(bool DontProcess) {
sockaddr_storage PeerAddress;
socklen_t PeerSize = sizeof(PeerAddress);
SOCKET Client;
Client = accept(m_Listener, (sockaddr *)&PeerAddress, &PeerSize);
if (Client != INVALID_SOCKET) {
Accept(Client, (sockaddr *)&PeerAddress);
}
return 0;
}
virtual int Write(void) { return 0; }
virtual void Error(int ErrorCode) { }
virtual bool HasQueuedData(void) const { return false; }
virtual bool ShouldDestroy(void) const { return false; }
virtual const char *GetClassName(void) const { return "CListenerBase"; }
protected:
virtual void Accept(SOCKET Client, const sockaddr *PeerAddress) = 0;
public:
/**
* CListenerBase
*
* Constructs a new CListenerBase object.
*
* @param Port the port of the socket listener
* @param BindIp the ip address used for binding the listener
* @param Family the socket family of the listener (AF_INET or AF_INET6)
*/
CListenerBase(unsigned int Port, const char *BindIp = NULL, int Family = AF_INET) {
m_Listener = INVALID_SOCKET;
if (m_Listener == INVALID_SOCKET) {
m_Listener = g_Bouncer->CreateListener(Port, BindIp, Family);
}
if (m_Listener != INVALID_SOCKET) {
g_Bouncer->RegisterSocket(m_Listener, static_cast<CSocketEvents *>(this));
}
}
/**
* ~CListenerBase
*
* Destructs a listener object.
*/
virtual ~CListenerBase(void) {
if (g_Bouncer != NULL && m_Listener != INVALID_SOCKET) {
g_Bouncer->UnregisterSocket(m_Listener);
}
if (m_Listener != INVALID_SOCKET) {
closesocket(m_Listener);
}
}
/**
* Destroy
*
* Destroys a listener object and calls its destructor.
*/
virtual void Destroy(void) {
delete this;
}
/**
* IsValid
*
* Verifies that the underlying socket object is valid.
*/
virtual bool IsValid(void) const {
if (m_Listener != INVALID_SOCKET) {
return true;
} else {
return false;
}
}
/**
* GetSocket
*
* Returns the socket which is used by the listener object.
*/
virtual SOCKET GetSocket(void) const {
return m_Listener;
}
virtual unsigned int GetPort(void) const {
sockaddr_storage Address;
socklen_t Length = sizeof(Address);
if (m_Listener == INVALID_SOCKET || getsockname(m_Listener, (sockaddr *)&Address, &Length) != 0) {
return 0;
} else {
if (Address.ss_family == AF_INET) {
return ntohs(((sockaddr_in *)&Address)->sin_port);
} else if (Address.ss_family == AF_INET6) {
return ntohs(((sockaddr_in6 *)&Address)->sin6_port);
} else {
return 0;
}
}
}
};
/**
* IMPL_SOCKETLISTENER
*
* Can be used to implement a custom listener.
*/
#define IMPL_SOCKETLISTENER(ClassName) class ClassName : public CListenerBase<ClassName>
#ifdef SBNC
/**
* CClientListener
*
* A listener which can be used by bouncer clients to connect to the bouncer.
*/
IMPL_SOCKETLISTENER(CClientListener) {
bool m_SSL; /**< whether this is an SSL listener */
public:
/**
* CClientListener
*
* Constructs a new client listener.
*
* @param Port the port
* @param BindIp the bind address (or NULL)
* @param Family socket family (AF_INET or AF_INET6)
* @param SSL whether the listener should be using ssl
*/
CClientListener(unsigned int Port, const char *BindIp = NULL, int Family = AF_INET,
bool SSL = false) : CListenerBase<CClientListener>(Port, BindIp, Family) {
m_SSL = SSL;
}
/**
* Accept
*
* Accepts a new client.
*
* @param Client the client socket
* @param PeerAddress the remote address of the client
*/
virtual void Accept(SOCKET Client, const sockaddr *PeerAddress) {
CClientConnection *ClientObject;
unsigned long lTrue = 1;
ioctlsocket(Client, FIONBIO, &lTrue);
// destruction is controlled by the main loop
ClientObject = new CClientConnection(Client, m_SSL);
}
/**
* SetSSL
*
* Sets whether this listener should accept SSL clients.
*
* @param SSL boolean flag
*/
void SetSSL(bool SSL) {
m_SSL = SSL;
}
/**
* GetSSL
*
* Checks whether this listener accepts SSL clients.
*/
bool GetSSL(void) const {
return m_SSL;
}
};
#else /* SBNC */
class CClientListener;
#endif /* SBNC */
#endif /* LISTENER_H */
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