extension.cpp File Reference

#include "lspdef.h"

Include dependency graph for extension.cpp:

Go to the source code of this file.

Functions
BOOL	LoadExtensionFunction (FARPROC **func, GUID ExtensionGuid, LPWSPIOCTL fnIoctl, SOCKET s)
BOOL PASCAL FAR	ExtConnectEx (IN SOCKET s, IN const struct sockaddr FAR *name, IN int namelen, IN PVOID lpSendBuffer OPTIONAL, IN DWORD dwSendDataLength, OUT LPDWORD lpdwBytesSent, IN LPOVERLAPPED lpOverlapped)

---

Function Documentation

BOOL PASCAL FAR ExtConnectEx	(	IN SOCKET	s,
		IN const struct sockaddr FAR *	name,
		IN int	namelen,
		IN PVOID lpSendBuffer	OPTIONAL,
		IN DWORD	dwSendDataLength,
		OUT LPDWORD	lpdwBytesSent,
		IN LPOVERLAPPED	lpOverlapped
	)

Definition at line 83 of file extension.cpp.

{
    SOCKET_CONTEXT *sockContext = NULL;
    SOCKADDR       *proxyAddr = NULL;
    int             Errno = NO_ERROR,
                    proxyLen = 0,
                    rc = FALSE;

    sockContext = FindSocketContext( s );
    if ( NULL == sockContext )
    {
        dbgprint("ExtConnectEx: FindSocketContext failed!");
        Errno = WSAENOTSOCK;
        goto cleanup;
    }

    // Make sure we already have the extension function
    if ( NULL == sockContext->Provider->NextProcTableExt.lpfnConnectEx )
    {
        GUID    guidConnectEx = WSAID_CONNECTEX;

        rc = LoadExtensionFunction(
                (FARPROC **)&sockContext->Provider->NextProcTableExt.lpfnConnectEx,
                guidConnectEx,
                sockContext->Provider->NextProcTable.lpWSPIoctl,
                s
                );
        if ( FALSE == rc )
        {
            dbgprint("Next proc table ConnectEx == NULL!");
            Errno = WSAEFAULT;
            goto cleanup;
        }
    }

    // See if the connect needs to be proxied
    FindDestinationAddress( sockContext, name, namelen, &proxyAddr, &proxyLen );

    rc = sockContext->Provider->NextProcTableExt.lpfnConnectEx(
            s,
            proxyAddr,
            proxyLen,
            lpSendBuffer,
            dwSendDataLength,
            lpdwBytesSent,
            lpOverlapped
            );

cleanup:

    return rc;
}

BOOL LoadExtensionFunction	(	FARPROC **	func,
		GUID	ExtensionGuid,
		LPWSPIOCTL	fnIoctl,
		SOCKET	s
	)

Definition at line 35 of file extension.cpp.

{
    DWORD   dwBytes;
    int     rc, 
            error;

    // Use the lower provider's WSPIoctl to load the extension function
    rc = fnIoctl(
            s,
            SIO_GET_EXTENSION_FUNCTION_POINTER,
           &ExtensionGuid,
            sizeof(GUID),
            func,
            sizeof(FARPROC),
           &dwBytes,
            NULL,
            NULL,
            NULL,
           &error
            );
    if ( SOCKET_ERROR == rc )
    {
        dbgprint("LoadExtensionFunction: WSAIoctl (SIO_GET_EXTENSION_FUNCTION) failed: %d",
            error);
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}