This summarizes the set of WSHXxx functions that every WSH DLL must export. Each supplier of a new transports can implement these functions in a corresponding WSH DLL according to the features supported by each transport. Windows Sockets treats all WSH DLLs as trusted code. Consequently, any bug in a WSHXxx function manifests itself as bug(s) in Windows Sockets.
WSHGetSockAddrType parses a socket address.
WSHGetSocketInformation is called whenever getsockopt is passed an option that Windows Sockets does not explicitly support.
WSHGetWildCardSockAddr is called when Windows Sockets needs to perfom an “automatic” bind of a socket.
WSHGetWinsockMapping returns information about the address family, socket type, and protocol parameter triples supported by the WSH DLL.
WSHNotify is called to notify the helper DLL of a state transition.
WSHOpenSocket is called when a socket is opened.
WSHSetSocketInformation is
called whenever setsockopt is passed an option that Windows Sockets
does not explicitly support.
WSHGetBroadcastSockaddr obtains a valid broadcast address for a socket.
WSHGetProviderGuid returns the GUID that identifies the protocols supported by a helper DLL.
WSHGetWSAProtocolInfo returns a pointer to protocol information for the protocol(s) supported by a helper DLL. This function is only used during setup.
WSHIoctl obtains information or performs actions based on a unique control code.
WSHJoinLeaf performs any protocol-specific actions that must be taken to add a socket to a multipoint session.
WSHOpenSocket2 performs the protocol-specific actions for creating a new socket. If this function is exported, it replaces the WSHOpenSocket function.
WSHStringToAddress converts a logical string representation of a socket address to a SOCKADDR structure.
For more detailed information about these these WSHXxx functions, see the Network Driver Reference.