conn.h

linux下的一款播放器

							 UINT16 	port) = 0;

	virtual	ULONG32		get_addr		(void) = 0;
	virtual UINT16		get_local_port		(void) = 0;

	virtual void		set_callback	(HXAsyncNetCallback* pCallback) {mCallBack = pCallback;};
	virtual HXAsyncNetCallback* get_callback()	{return mCallBack;};


/* connection_open() returns 1 if the socket is open 0 is it is closed */
	virtual  UINT16		connection_open	(void)		{return mConnectionOpen;};
	virtual  UINT16		connection_really_open	(void)	{return mConnectionOpen;};

/* get_sock() returns the socket number or -1 if the socket is invalid */
	virtual int		get_sock		(void)		{return mSock;};
	virtual void		set_sock		( int theSock ) { mSock = theSock; };

	virtual BOOL		set_receive_buf_size(int DesiredSize) {return FALSE;};

/* join_multicast_group() has this socket join a multicast group */
	virtual HX_RESULT	join_multicast_group 
	    (ULONG32 addr, ULONG32 if_addr = HX_INADDR_ANY) = 0;
	virtual HX_RESULT	leave_multicast_group
	    (ULONG32 addr, ULONG32 if_addr = HX_INADDR_ANY) = 0;
	virtual HX_RESULT       set_multicast() {return HXR_NOTIMPL;};
	virtual HX_RESULT       set_multicast_ttl(unsigned char ttl) {return HXR_NOTIMPL;};

/* SetSockOpt */
	virtual HX_RESULT	set_broadcast (BOOL enable) =0;
	virtual HX_RESULT	reuse_addr(BOOL enable) {return HXR_NOTIMPL;};
	virtual HX_RESULT	reuse_port(BOOL enable) {return HXR_NOTIMPL;};
	virtual HX_RESULT	set_multicast_if(UINT32 ulInterface) = 0;
	virtual HX_RESULT       set_send_size(UINT32 send_size) {return HXR_NOTIMPL;};

	// IHXNetworkInterfaceEnumerator support */
	static HX_RESULT EnumerateInterfaces
	    (REF(UINT32*) pulInterfaces, REF(UINT32) ulNumInterfaces);		    
	static HX_RESULT get_host_name(char *name, int namelen);
	static HX_RESULT get_host_by_name(char *name, REF(struct hostent*) pHostent);

	virtual void		SetUserThread(HXThread* pThread) {m_pUserThread = pThread;};
	virtual HXThread*	GetUserThread(void) {return m_pUserThread;};

/* get_first_connection_position returns the position of the first connection
   in the list of connections; if the list is empty the return value is
   NULL */

	static POSITION		get_first_connection_position ();

/* get_next_connection returns the conn object at POSITION and increments
   POSITION to point to the next */

	static void		get_next_connection	(POSITION& 	nextPos,
							 conn *& 	rpConn);

	static void		set_maxbandwidth (UINT32 ulBandwidth);

	// TCP max. bandwidth management
	static UINT32		bytes_to_preparetcpread(conn* pConn);
	static void		bytes_to_actualtcpread(conn* pConn, UINT32 ulBytesRead);

	UINT32			m_ulLastStarvingTime;
	static UINT32   	m_ulMaxBandwidth;

        inline void SetAsyncDNSPref(BOOL bNoAsyncDNS)
        { m_bNoAsyncDNS = bNoAsyncDNS; }
        inline BOOL GetAsyncDNSPref(void) const { return m_bNoAsyncDNS; }
        
        static inline void SetNetworkThreadingPref(BOOL bNetworkThreading)
        { m_bNetworkThreading = bNetworkThreading; }
        static inline BOOL GetNetworkThreadingPref(void) { return m_bNetworkThreading; }
        
        static inline void SetThreadedDNSPref(BOOL bThreadedDNS ) { m_bThreadedDNS = bThreadedDNS; }
        static inline BOOL GetThreadedDNSPref(void) { return m_bThreadedDNS; }    

        /*
         * WinSock Recvfrom() Now Returns WSAECONNRESET Instead of Blocking or Timing Out (Q263823)
         * workaround - only for win UDP
         */
        virtual void IgnoreWSAECONNRESET(BOOL b) {}
        
	/*
	 * to run the networkthreadmainloop from select instead of the timer 
	 * implement this function in your platform specific connection class
	 * the parameters are the 3 fdset structures and timeval used in select
	 */
#if defined(HELIX_FEATURE_NETWORK_USE_SELECT)
	virtual HX_RESULT WaitforSelect(void *,void *) = 0;
	virtual HX_RESULT CheckForConnection()=0;
#endif /* HELIX_FEATURE_NETWORK_USE_SELECT */
        
protected:

/* 	Constructor NOTE: use new_socket() to create an instance of this class */

						conn			(void);
/* 	class destructor */	
	virtual			   	~conn			(void);

		int					mSock;
		HX_RESULT			mLastError;			// last error to occur on this socket
		UINT16				mConnectionOpen;
		HXAsyncNetCallback*		mCallBack;

		static DNR_cache	mCache[MAX_CACHE];
		static UINT16 		mCacheCount;
	
	// just for DNS for hostname...
	// is introduced for RTSP...
	ULONG32				mHostIPAddr;
	BOOL				mHostIPValid;
	BOOL				mDNSDone;

	HXThread*			m_pUserThread;
	UCHAR*				m_pUDPBuffer;
	
protected:

/* add_connection_to_list () is called by the factory method new_socket()
   to keep track of all the sockets in the system; it should only be
   accessible to the base class since that's where the factory method resides */

	static void			add_connection_to_list	( conn *pConn );

/* remove_connection_from_list () is called in the base class destructor 
   to remove objects from the list of connections. */

	static void			remove_connection_from_list ( conn *pConn );

	static	conn*			actual_new_socket 	(UINT16 type);


	static CHXMapPtrToPtr*		mConnectionList;
					
	static HXThread*		m_pNetworkThread;

	// TCP max. bandwidth management	
	static UINT32			m_ulTCPTotalBytesRead;
	static UINT32			m_ulTCPReadTimeStamp;
	static CHXSimpleList*		m_pTCPStarvingList;

        //This member variable holds the pref for turning on/off Async
        //DNS. Async DNS, under un*x, uses a fork which screws up 'gdb'.
        //You can set NoAsyncDNS=1 in your prefs file to turn off the fork.
        BOOL m_bNoAsyncDNS;
        static BOOL m_bNetworkThreading;
        static BOOL m_bThreadedDNS;
};

class DestructConnGlobals
{
public:
    DestructConnGlobals() {};
    ~DestructConnGlobals() {conn::DestructGlobals();};
};

#if defined(HELIX_FEATURE_SECURECONN)
class secureconn : public conn
{
private:
    LONG32 m_lRefCount;
    conn* m_pActualConn;
    LONG32 m_FakeFD;
    static LONG32 zm_Count;
    IHXSSL*	m_pHXSSL;
    
public:
    secureconn(IHXSSL* pHXSSL);
    virtual ~secureconn();
    
    virtual ULONG32 AddRef(void);
    virtual ULONG32 Release(void);
    
    virtual HX_RESULT connect(const char* host, UINT16 port, UINT16 blocking=0, ULONG32 ulPlatform=0);
    virtual HX_RESULT read(void* buf, UINT16* size);
    virtual HX_RESULT write(void* buf, UINT16* size);
    
    virtual HX_RESULT blocking(void);
    virtual HX_RESULT nonblocking(void);
    virtual HX_RESULT	readfrom	(REF(IHXBuffer*)   pBuffer,
					 REF(UINT32)	    ulAddress,
					 REF(UINT16)	    ulPort);
	
    virtual HX_RESULT	writeto		(void 		*buf,
					 UINT16 	*len, 
					 ULONG32 	addr,
					 UINT16 	port);

    virtual ULONG32	get_addr	(void);
    virtual UINT16	get_local_port	(void);
    virtual HX_RESULT	dns_find_ip_addr (const char * host, UINT16 blocking=0);
    virtual BOOL	dns_ip_addr_found(BOOL * valid, ULONG32 *addr);
    virtual void	done(void);
    virtual HX_RESULT	init		(UINT32		local_addr,
					 UINT16 	port, 
					 UINT16 	blocking=0);
    virtual HX_RESULT	listen		(ULONG32	ulLocalAddr,
					 UINT16		port,
					 UINT16 	backlog,
					 UINT16		blocking,
					 ULONG32	ulPlatform);
    virtual HX_RESULT	join_multicast_group 
	    (ULONG32 addr, ULONG32 if_addr = HX_INADDR_ANY);
    virtual HX_RESULT	leave_multicast_group
	    (ULONG32 addr, ULONG32 if_addr = HX_INADDR_ANY);
    virtual HX_RESULT	set_broadcast (BOOL enable);
    virtual HX_RESULT	set_multicast_if(UINT32 ulInterface);
    
    // all of these functions need to be implemented so I can
    // call through to the final implemenations' code.
    
	virtual	HX_RESULT	last_error		(void);
#if	defined (_WINDOWS) || defined (_WIN32)
//	virtual HX_RESULT 	SetWindowHandle(ULONG32 handle) {return HXR_OK;};
#elif	defined (_MACINTOSH)
 	virtual HX_RESULT	GetEndpoint(REF(void*) pRef);
	virtual HX_RESULT	SetupEndpoint(BOOL bWait);
#endif
	virtual void		set_callback	(HXAsyncNetCallback* pCallback);
	virtual  UINT16		connection_open	(void);
	virtual int		get_sock		(void);
	virtual void		set_sock		( int theSock );
	virtual BOOL		set_receive_buf_size(int DesiredSize);
	virtual HX_RESULT	reuse_addr(BOOL enable);
	virtual HX_RESULT	reuse_port(BOOL enable);

#if defined(HELIX_FEATURE_NETWORK_USE_SELECT)
	    HX_RESULT	    WaitforSelect(void *,void *) {return HXR_FAIL;};
    virtual HX_RESULT CheckForConnection(){return HXR_FAIL;};
#endif // HELIX_FEATURE_NETWORK_USE_SELECT
};

class secureconnhelper
{
public:
static CHXMapPtrToPtr zm_ConnMap;
static conn* GetConn(LONG32 fakeFD);
static void SetConn(LONG32 fakeFD, conn* pConn);

// callbacks from rnssl
static long readCallback(LONG32 fakeFD, void* buff, LONG32 len);
static long writeCallback(LONG32 fakeFD, void* buff, LONG32 len);
static void closeCallback(LONG32 fakeFD);

};
#endif /* HELIX_FEATURE_SECURECONN */
	
#endif // _conn