nudpconnection.h

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/*
 * nudpconnection.h,v 1.1 2003/12/27 19:46:23 matti Exp
 *
 * COBAIN - Communications API for EPOC Environments
 * Copyright (C) 2002-2003 Matti Dahlbom, Matti Kokkola
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Contact: Matti Dahlbom <matti@777-team.org>
 *          Matti Kokkola <matti.kokkola@iki.fi>
 */

#ifndef __NUDP_CONNECTION_H
#define __NUDP_CONNECTION_H

#include <e32base.h>

#include "concreteconnection.h"

// Size of nanoUDP protocol header in octets
const TInt KNUDPHeaderSize = 5;

// nanoUDP protocol number
const TUint8 KNUDPProtocolNumber = 0;

// Flag value indicating first fragment (0100)
const TUint8 KFirstFragment = 0x4; 

// Flag value indicating last fragment (1000)
const TUint8 KLastFragment = 0x8;

class CNUDPConnection : public CConcreteConnection
{
 public:
    static CNUDPConnection * NewL(RSocket *aSocket, 
                  CServerSession &aSession,
                  TInt aMtu);
    static CNUDPConnection * NewListeningL(RSocket *aSocket,
                       RSocketServ *aSocketServ,
                       CServerSession &aSession);

    ~CNUDPConnection();

    void ReceiveL(const RMessage &aMessage);
    void SendL(TDesC8 *aBuf);

 private:
    // Functions
    CNUDPConnection(RSocket* aSocket,
            RSocketServ *aSocketServ, 
            CServerSession &aSession,
            TInt aMtu);
    
    TDesC8 *CreateFrame(TDesC8 *aBuf, TUint8 aFlags, TUint16 aLen);

    // Data
    TUint8 iSrcPort;
    TUint8 iDstPort;

    friend class CConcreteConnection;
};

#endif // __NUDP_CONNECTION

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