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/TCPConnection.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 TCPCONNECTION_H





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#define TCPCONNECTION_H





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#include "arch/cc.h"





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#include "lwip/err.h"





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//#include "lwip/tcp.h"





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#include "TCPItem.h"





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namespace mbed {





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class NetServer;





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class TCPListener;





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class TCPConnection : public TCPItem {





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  public:





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    TCPConnection(struct ip_addr, u16_t);





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    TCPConnection(TCPListener *, struct tcp_pcb *);





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    virtual ~TCPConnection();





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    void connect();





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    err_t write(void *, u16_t len, u8_t flags = TCP_WRITE_FLAG_COPY) const;





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    void recved(u32_t len) const;





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    u16_t sndbuf() const { return tcp_sndbuf(_pcb); }





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    void set_poll_timer(const u32_t &time) {





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      if(_pcb) {





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        _pcb->polltmr = time;





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      }





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    }





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    u32_t get_poll_interval() const {





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      return (_pcb)? _pcb->pollinterval: 0;





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    }





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    void set_poll_interval(const u32_t &value) {





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      if(_pcb) {





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        _pcb->pollinterval = value;





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      }





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    }





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    u32_t get_poll_timer() const {





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      return (_pcb)? _pcb->polltmr: 0;





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    }





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  protected:  





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    TCPConnection();





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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) = 0;





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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) = 0;





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    /**





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     * Function to be called when a connection has been set up.





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     * @param pcb the tcp_pcb that now is connected





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





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     * @return value is currently ignored





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     */





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    virtual err_t connected(err_t err);





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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() = 0;





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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 err) = 0;





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    virtual void dnsreply(const char *hostname, struct ip_addr *addr) = 0;





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    err_t dnsrequest(const char *hostname, struct ip_addr *addr) const;





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  private:





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    static void dnsreply_callback(const char *name, struct ip_addr *ipaddr, void *arg);





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    static err_t connected_callback(void *arg, struct tcp_pcb *pcb, err_t err);





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    static err_t sent_callback(void *arg, struct tcp_pcb *pcb, u16_t space);





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    static err_t recv_callback(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);





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    static err_t poll_callback(void *arg, struct tcp_pcb *pcb);





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    static void error_callback(void *arg, err_t erra);





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  protected:





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    TCPListener *_parent;





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    struct ip_addr _ipaddr;





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    u16_t _port;





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  friend class NetServer;





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};





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};





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#endif /* TCPCONNECTION_H */