TcpServer.Accept (METH)

METHOD Accept : ERROR_ID

Method Accept is called until an incoming connection is hand over from TCP stack

VAR
    fbTcpServer         : TcpServer;        (* Instance of server function block*)
    fbTcpConnection     : TcpConnection;    (* Instance of Tcp connection with remote device *)

    eErrorId            : AC500_Tcp.ERROR_ID;               (* Error Id of the Connect method *)
    dwAddErrNo          : AC500_Tcp.RTS_IEC_RESULT;         (* Additional error number - list available in GVL of CmpErrors.Erros library *)
    hSocket             : AC500_Tcp.RTS_IEC_HANDLE;         (* Handle to socket of the remote device *)
    stSocketAddrExt     : AC500_Tcp.SysSocket2.SOCKADDRESS; (* Socket address of external connected remote device *)
END_VAR


------------
// Call of TcpServer.Accept must run cyclically get incoming connections
eErrorId    := fbTcpServer.Accept(  AddErrNo        => dwAddErrNo,
                                    Socket          => hSocket,
                                    SocketAddrExt   => stSocketAddrExt);


// As long as BUSY, the server is waiting for an incoming connection
IF eErrorId <> AC500_Tcp.ERROR_ID.NO_ERROR THEN

    fbTcpConnection.SetIntSocketAddr( SockAddrSetByExternal := ADR(stSocketAddrExt));   // Assign socket address information to TcpConnection instance
    fbTcpConnection.Socket := hSocket;                                                  // Assign socket handle to TcpConnection instance

    ; // Continue with next steps to receive or send data via the fbTcpConnection instance

// If eErrorId does neither has NO_ERROR nor BUSY, an error is pending
ELSIF eErrorId <> AC500_Tcp.ERROR_ID.BUSY THEN

    ; // For ERR_INTERNAL, please check AddErrNo - AC500_Tcp.RTS_IEC_RESULT - the error codes are listed in the GVL of CmpErros.Errors

END_IF

InOut:

Scope	Name	Type	Comment
Return	Accept	ERROR_ID
Output	AddErrNo	RTS_IEC_RESULT	Additional error number gives information about error from SysSock2Close –> please see CmpErrors.Errors
	Socket	RTS_IEC_HANDLE	Socket handle of an incoming connection
	SocketAddrExt	SysSocket2.SOCKADDRESS	External Socket address of the incoming connection