Source: ../../libxipc/xrl_pf_sudp.hh

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// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-

// Copyright (c) 2001-2007 International Computer Science Institute
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software")
// to deal in the Software without restriction, subject to the conditions
// listed in the XORP LICENSE file. These conditions include: you must
// preserve this copyright notice, and you cannot mention the copyright
// holders in advertising related to the Software without their permission.
// The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This
// notice is a summary of the XORP LICENSE file; the license in that file is
// legally binding.

// $XORP: xorp/libxipc/xrl_pf_sudp.hh,v 1.22 2007/02/16 22:46:13 pavlin Exp $

#ifndef __LIBXIPC_XRL_PF_SUDP_HH__
#define __LIBXIPC_XRL_PF_SUDP_HH__

#include "xrl_pf.hh"

class XUID;

// ----------------------------------------------------------------------------
// XRL Protocol Family : Simplest UDP

class XrlPFSUDPListener : public XrlPFListener {
public:
    XrlPFSUDPListener(EventLoop& e, XrlDispatcher* xr = 0)
	throw (XrlPFConstructorError);
    ~XrlPFSUDPListener();

    const char* address() const			{ return _addr.c_str(); }
    const char* protocol() const		{ return _protocol; }

    bool response_pending() const;

private:
    const XrlError dispatch_command(const char* buf, XrlArgs& response);

    void send_reply(struct sockaddr_storage*	ss,
		    socklen_t			ss_len,
		    const XrlError&		e,
		    const XUID&			xuid,
		    const XrlArgs*		response);

    void recv(XorpFd fd, IoEventType type);

    XorpFd	_sock;
    string _addr;
    static const char* _protocol;
};

class XrlPFSUDPSender : public XrlPFSender {
public:
    XrlPFSUDPSender(EventLoop& e, const char* address = NULL)
	throw (XrlPFConstructorError);
    virtual ~XrlPFSUDPSender();

    bool send(const Xrl& 			x,
	      bool 				direct_call,
	      const XrlPFSender::SendCallback& 	cb);

    bool sends_pending() const;

    bool alive() const;

    const char* protocol() const;

    inline static const char* protocol_name()		{ return _protocol; }

protected:
    static void recv(XorpFd fd, IoEventType type);
    void timeout_hook(XUID x);

private:
    struct sockaddr_in		_destination;

    static const char* _protocol;
    static XorpFd sender_sock;  	// shared fd between all senders
    static int instance_count;
};

#endif // __LIBXIPC_XRL_PF_SUDP_HH__