#ifdef TCP_GLOBALS
#define TCP_EXT
#else
#define TCP_EXT extern 
#endif 

/* TCP task SEM_NUM*/
//#define AppSemSend 	8
//#define AppSemCon 	12
//#define AppSemDisc 	40
TCP_EXT OS_EVENT  		*AppSemSend[MAX_TCP_LINKS];
TCP_EXT OS_EVENT  		*AppSemCon[MAX_TCP_LINKS];
TCP_EXT OS_EVENT  		*AppSemDisc[MAX_TCP_LINKS];	

/*tcp state define */
#define 	TCP_STATE_CLOSED        0
#define 	TCP_STATE_LISTEN        1
#define 	TCP_STATE_SYN_RCVD      2
#define 	TCP_STATE_SYN_SENT      3
#define 	TCP_STATE_ESTABLISHED   4
#define 	TCP_STATE_FIN_WAIT1     5
#define 	TCP_STATE_FIN_WAIT2     6
#define 	TCP_STATE_CLOSING       7
#define 	TCP_STATE_CLOSE_WAIT    8
#define 	TCP_STATE_LAST_ACK      9
#define 	TCP_STATE_TIME_WAIT     10
//tcp連接的標志位
#define 	TCP_FIN 0x01
#define 	TCP_SYN 0x02
#define 	TCP_RST 0x04
#define 	TCP_PSH 0x08
#define 	TCP_ACK 0x10
#define 	TCP_URG 0x20

struct tcp_data {  
	            uint16 	SourcePort;//f  	   	/*源端口*//
	            uint16 	DestPort;    //f	   	/*目的端口*/
	            uint32 	SeqNum;  //0-3 f	   		/*順序號*/
	            uint32 	AckNum;  //0-3 f	   		/*確認號*/
	            uint8 	offset;     	   	/*數據偏移量*/
	            uint8 	control;    	   	/*連接控制*/
	            uint16 	window; //f     	   	/*流控*/
	            uint16 	Crc;     //f    	   	/*校驗和 ，包括偽頭部，TCP頭部，數據*/
	            uint16 	urg;               	/*緊急指針*/
	            uint8 	tcpdata[MAX_TCP_DATA];     	/*TCP數據*/
	           };
struct  tcp_dhead{  
		uint8	rev; 
		uint8	NextProtocal;
               	uint16 	TotalLen;          /*校驗和,包括偽頭部,udp頭部,數據*/
             	uint8 	SourceIp[4];  	   /*源端口*/
               	uint8 	DestId[4];     	   /*目的端口*/
			   };
typedef struct  {
				struct tcp_dhead 	TcpDHead;
				struct tcp_data		Tcp;			
		}tcp_send;
struct Socket_Type{
                   	uint16   	My_Port; 		 		//本機端口
		   	uint16  	Dest_Port;		 		//對方端口
		   	uint8  		Dest_Ip[4];	 			//對方ip
		   	uint8		My_Ip[4];
		   	uint32 		IRS;			 		//初始化順序號
                   	uint32 		ISS;			 		//我的初始化序列號
                   	uint32 		Rcv_Next;		 		//對方的順序號
		   	uint32 		Send_Next;		 		//我的已經發送順序號
                   	uint32 		Sent_UnAck;		 		//我的還沒有確認順序號
		   	uint32		RecPassSeq;
		   	uint32		RecPassAck;
		   	uint32		SenPassSeq;
		   	uint32		SenPassAck;
		   	uint32		RecFutureAck;
		   	uint32		SenFutureSeq;
		   	//unsigned long dest_ack_number;
		   	uint16 		Rcv_Window;		 		//對方的window大小
                   	uint16 		Snd_Window; 		 	//我的window大小
        	   	uint16 		Dest_Max_Seg_Size;		//對方接受的最大的數據包大小MTU
                   	uint16 		My_Max_Seg_Size; 		//我能接受的最大的數據包大小
		   	uint32 		My_Wl1;		//seq
		   	uint32 		My_Wl2;		//ack
                   	uint8 		State;		//連接狀態
		   	uint8 		Open;
			uint8 		ResendState;
			uint8 		ResendTime;
			uint16		ResendLength;
			uint8		StaSem;	//BIT7表示該連接是LISTEN開始的，即服務器的。BIT1是表示該連接等待AppSemCon信號量。BIT0是表示正等待AppSemSend信號量
			//struct tcp_data 	resend_data;
			uint8 		TcpDHeadUint8[12];
			uint8 		TcpHeadUint8[MAX_TCP_DATA+20];
			uint8 		TcpDataQ[MAX_TCP_DATA];
			uint16		TcpDataQWrPtr;
			uint16		TcpDataQRdPtr;
                  };
TCP_EXT uint16 CheckSumTcp1(uint8 num,uint16 length);
TCP_EXT void Delete_Socket(uint8 num) ;
TCP_EXT struct Socket_Type TcpStatus[MAX_TCP_LINKS];
TCP_EXT	void TcpHeadHandle(uint8 num ,uint16 Tcp_headlength_Control);
//TCP_EXT	uint8 Tcp_Connect1(uint8 aa) keilreentrant ;
TCP_EXT uint8 Process_Tcp1(Rec_Ptr * Tcp_Rec) ;// USE_XDATA keilreentrant ;
TCP_EXT void Tcp_Initial(void);// keilreentrant ;
TCP_EXT void TCB_Delete(uint8 i);