Pehr Hovey / Mbed 2 deprecated UDPtest

Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed

Dependencies:   mbed

Core/TCPCallbackConnection.h@0:a548a085de55, 2010-03-14 (annotated)

Committer:
pehrhovey
Date:
Sun Mar 14 00:54:12 2010 +0000
Revision:
0:a548a085de55

        

        
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#ifndef TCPCALLBACKCONNECTION_H





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#define TCPCALLBACKCONNECTION_H





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#include "TCPConnection.h"





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namespace mbed {





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#define NO_SENT_FNC    ((err_t (*)(TCPCallbackConnection *, u16_t))NULL)





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#define NO_RECV_FNC    ((err_t (*)(TCPCallbackConnection *, struct pbuf *, err_t))NULL)





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#define NO_POLL_FNC    ((err_t (*)(TCPCallbackConnection *))NULL)





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#define NO_ACCEPT_FNC  ((err_t (*)(TCPCallbackConnection *, struct tcp_pcb *, err_t))NULL)





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#define NO_CONNECT_FNC ((err_t (*)(TCPCallbackConnection *, err_t))NULL)





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#define NO_ERR_FNC      ((void (*)(TCPCallbackConnection *, err_t))NULL)





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class TCPCallbackConnection : public TCPConnection {





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  public:





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    TCPCallbackConnection(struct ip_addr ip_addr, u16_t port,





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       err_t (*psent)(TCPCallbackConnection *, u16_t),





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       err_t (*precv)(TCPCallbackConnection *, struct pbuf *, err_t),





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       err_t (*ppoll)(TCPCallbackConnection *),





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       err_t (*pconnected)(TCPCallbackConnection *, err_t),





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       void  (*perr )(TCPCallbackConnection *, err_t))





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      : TCPConnection(ip_addr, port) {





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      _sent = psent;





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      _recv = precv;





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      _poll = ppoll;





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      _connected = pconnected;





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      _err  = perr;





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    }





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    TCPCallbackConnection(TCPListener *parent, struct tcp_pcb *npcb,





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       err_t (*psent)(TCPCallbackConnection *, u16_t),





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       err_t (*precv)(TCPCallbackConnection *, struct pbuf *, err_t),





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       err_t (*ppoll)(TCPCallbackConnection *),





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       err_t (*pconnected)(TCPCallbackConnection *, err_t),





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       void  (*perr )(TCPCallbackConnection *, err_t))





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      : TCPConnection(parent, npcb) {





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      _sent = psent;





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      _recv = precv;





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      _poll = ppoll;





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      _connected = pconnected;





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      _err  = perr;





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    }





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  private:





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    /*





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     * Function to be called when more send buffer space is available.





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     * @param space the amount of bytes available





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     * @return ERR_OK: try to send some data by calling tcp_output





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     */





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    virtual err_t sent(u16_t space) { 





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      if(_sent) {





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        return (_sent)(this, space);





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      } else {





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        return ERR_OK;





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      }





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    }





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    /*





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     * Function to be called when (in-sequence) data has arrived.





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     * @param p the packet buffer which arrived





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     * @param err an error argument (TODO: that is current always ERR_OK?)





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     * @return ERR_OK: try to send some data by calling tcp_output





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     */





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    virtual err_t recv(struct pbuf *p, err_t err) { 





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      if(_recv) {





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        return (_recv)(this, p, err);





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      } else {





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        return ERR_OK;





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      }





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    }





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    /*





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     * Function which is called periodically.





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     * The period can be adjusted in multiples of the TCP slow timer interval





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     * by changing tcp_pcb.polltmr.





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     * @return ERR_OK: try to send some data by calling tcp_output





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     */





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    virtual err_t poll() {





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      if(_poll) {





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        return (_poll)(this);





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      } else {





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        return ERR_OK;





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      }





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    }





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    virtual err_t connected(err_t err) {





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      err = TCPConnection::connected(err);





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      if(_connected) {





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        return (_connected)(this, err);





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      } else {





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        return ERR_OK;





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      }





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    }





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    /*





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     * Function to be called whenever a fatal error occurs.





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     * There is no pcb parameter since most of the times, the pcb is





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     * already deallocated (or there is no pcb) when this function is called.





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     * @param err an indication why the error callback is called:





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     *            ERR_ABRT: aborted through tcp_abort or by a TCP timer





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     *            ERR_RST: the connection was reset by the remote host





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     */





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    virtual void err(err_t erra) {





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      if(_err) {





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        (_err)(this, erra);





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      }





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    }





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    virtual void dnsreply(const char *hostname, struct ip_addr *addr) {};





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    err_t (*_sent)(TCPCallbackConnection *, u16_t);





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    err_t (*_recv)(TCPCallbackConnection *, struct pbuf *p, err_t err);





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    err_t (*_poll)(TCPCallbackConnection *);





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    err_t (*_accept)(TCPCallbackConnection *, struct tcp_pcb *newpcb, err_t err);





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    err_t (*_connected)(TCPCallbackConnection *, err_t err);





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    void  (*_err )(TCPCallbackConnection *, err_t);





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};





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};





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#endif /* TCPCALLBACKCONNECTION_H */