SysSock2FdZero (FUN) ¶ FUNCTION SysSock2FdZero : RTS_IEC_RESULT Clear a Socket set. InOut: Scope Name Type Comment Return SysSock2FdZero RTS_IEC_RESULT Returns the runtime system error code (see CmpErrors.library). Input pfs REFERENCE TO SOCKET_FD_SET Socket Set

SysSock2GetOption (FUN) ¶ FUNCTION SysSock2GetOption : RTS_IEC_RESULT Set options of a specified socket. InOut: Scope Name Type Comment Return SysSock2GetOption RTS_IEC_RESULT Runtime system error code (see CmpErrors.library). Input hSocket RTS_IEC_HANDLE Handle to the socket diLevel DINT Level of the socket diOption DINT Socket option command pdiOptionValue POINTER TO BYTE Pointer to the option value pdiOptionLen POINTER TO DINT Lenght of option value

SysSock2GetPeerName (FUN) ¶ FUNCTION SysSock2GetPeerName : RTS_IEC_RESULT Returns the socket address of the peer to which a socket is connected. The SysSockGetPeerName function can be used only on a connected socket. InOut: Scope Name Type Comment Return SysSock2GetPeerName RTS_IEC_RESULT Runtime system error code (see CmpErrors.library). Input hSocket RTS_IEC_HANDLE Handle to the socket pSockAddr POINTER TO SOCKADDRESS Socket address of the peer pdiSockAddrSize POINTER TO DINT Pointer to size of socket address structure

SysSock2GetSockName (FUN) ¶ FUNCTION SysSock2GetSockName : RTS_IEC_RESULT Returns the socket address of the local socket. Usally this function is called to retrieve the local socket address on multihomed hosts or to get the local port number in client implemntations. If the socket is neither connected nor locally bound to an address, the result of the function and the value stored in the object pointed to by pSockAddress is unspecified. InOut: Scope Name Type Comment Return SysSock2GetSockName RTS_IEC_RESULT Runtime system error code (see CmpErrors.library). Input hSocket RTS_IEC_HANDLE Handle to the socket pSockAddr POINTER TO SOCKADDRESS Socket address of the local socket pdiSockAddrSize POINTER TO DINT Pointer to size of socket address structure

SysSock2Htons (FUN) ¶ FUNCTION SysSock2Htons : WORD Converts a value of type short from order of the TCP/IP network to the host byte order. InOut: Scope Name Type Comment Return SysSock2Htons WORD Converted WORD value Input usHost WORD Ethernet value

SysSock2Htonl (FUN) ¶ FUNCTION SysSock2Htonl : UDINT Converts a value of type UDINT from host byte order to the order of the TCP/IP network. InOut: Scope Name Type Comment Return SysSock2Htonl UDINT Converted UDINT value Input ulHost UDINT Host value

SysSock2InetAddr (FUN) ¶ FUNCTION SysSock2InetAddr : RTS_IEC_RESULT Convert an IP address string into an IP address. InOut: Scope Name Type Comment Return SysSock2InetAddr RTS_IEC_RESULT Runtime system error code (see CmpErrors.library). Input szIPAddress REFERENCE TO STRING Pointer to get IP address string (must be at least 16 bytes long) pInAddr POINTER TO UDINT Pointer to IP address description

SysSock2InetNtoa (FUN) ¶ FUNCTION SysSock2InetNtoa : RTS_IEC_RESULT Convert IP address to a string. InOut: Scope Name Type Comment Return SysSock2InetNtoa RTS_IEC_RESULT Runtime system error code (see CmpErrors.library). Input pInAddr POINTER TO INADDR Pointer to IP address description szIPADDR REFERENCE TO STRING Pointer to get IP address string (must be at least 16 bytes long) diIPAddrSize DINT Maximum length of szIPAddr

SysSock2Ioctl (FUN) ¶ FUNCTION SysSock2Ioctl : RTS_IEC_RESULT Io-control of a socket. InOut: Scope Name Type Comment Return SysSock2Ioctl RTS_IEC_RESULT Runtime system error code (see CmpErrors.library). Input hSocket RTS_IEC_HANDLE Handle to the socket diCommand DINT Io-control command pdiParameter POINTER TO DINT Parameter value of the command

SysSockBind (FUN) ¶ FUNCTION SysSockBind : RTS_IEC_RESULT Bind a socket to a socket address and port number. This functions calls the function bind of the operating system, which will assign a local address to a socket that has already been allocated to an address by SysSockCreate , but not yet fixed uniquely. This is usually done previous to a call to functions like SysSockListen or SysSockAccept . InOut: Scope Name Type Comment Return SysSockBind RTS_IEC_RESULT Runtime system error code (see CmpErrors.library). Input hSocket RTS_IEC_HANDLE Handle to the socket pSockAddr POINTER TO SOCKADDRESS Spcket address diSockAddrSize DINT Size of the socket address structure