FB_TlsSocketCreate

The function block FB_TlsSocketCreate can be used to create a new socket via the TwinCAT TCP/IP Connection Server, either for a server (bListener:=true) or client application (bListener:=false). Via a listener socket, the TwinCAT TCP/IP Connection Server can 'listen' for incoming connection requests from remote clients. If successful, the associated connection handle (hSocket) is returned at the hListner output. This handle is required by the function block FB_TlsSocketListen, and subsequently FB_SocketAccept. If a listener socket is no longer required, it can be closed with the function block FB_SocketClose. After the execution of the function block FB_TlsSocketCreate TLS parameters can be set to secure the communication connection. This is done using the function blocks FB_TlsSocketAddCa, FB_TlsSocketAddCrl, FB_TlsSocketSetCert and FB_TlsSocketSetPsk. Programming samples for this can be found in our samples.

Inputs

VAR_INPUT
    sSrvNetId : T_AmsNetId:='';
    bListener : BOOL:=FALSE;
    bExecute  : BOOL;
    tTimeout  : TIME:=T#5s;
END_VAR

Outputs

VAR_OUTPUT
    bBusy   : BOOL;
    bError  : BOOL;
    nErrId  : UDINT;
    hSocket : T_HSOCKET;
END_VAR