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4/8/2010

This function is called by the network address translation (NAT) driver for each packet received during a session controlled by a NAT editor.

Syntax 

NTSTATUS DataHandler( 
  PVOID 
InterfaceHandle, 
  PVOID 
SessionHandle, 
  PVOID 
DataHandle, 
  PVOID 
EditorContext, 
  PVOID 
EditorSessionContext, 
  PIPRCVBUF 
RecvBuffer, 
  ULONG 
DataOffset 
)

Parameters

InterfaceHandle

[in] Handle to an interface.

SessionHandle

[in] Handle to the session. Use this handle when calling the QueryInfoSessionfunction.

DataHandle

[in] Handle to the per-packet data context. Use this handle when calling the EditSessionfunction.

EditorContext

[in] Pointer to a context that the NAT editor supplied when the editor called the RegisterEditorfunction.

EditorSessionContext

[in] Pointer to the context of the session mapping that the editor supplied when the editor called the CreateHandlerfunction.

RecvBuffer

[in] Pointer to an IPRcvBufstructure that specifies the received packet data.

DataOffset

[in] Unsigned long integer that specifies the offset of the protocol data contained in RecvBuffer.

Return Value

STATUS_SUCCESS indicates success. A non-zero value indicates failure.

Remarks

This function is optional. Not all protocol editors need to implement this function.

The following code example shows an example of a DataHandlerfunction.

Copy Code 
NTSTATUS EditorForwardDataHandler(
	IN PVOID InterfaceHandle,
	IN PVOID SessionHandle,
	IN PVOID DataHandle,
	IN PVOID EditorContext,
	IN PVOID EditorSessionContext,
	IN PIPRCVBUF RecvBuffer,
	IN ULONG DataOffset
	)
{
#define BUFFER_LEN  64
PIPRCVBUF pRcvBuf = RecvBuffer;
TCHAR szTextBuffer[BUFFER_LEN];
while (pRcvBuf) 
	{
	_sntprintf(szTextBuffer, BUFFER_LEN, 
			TEXT("	ipr_buf: 0x%X, size: %u\r\n"), 
			pRcvBuf, pRcvBuf->ipr_size);
	szTextBuffer[BUFFER_LEN-1] = TEXT('\0'); // Guarantee
null-termination
	OutputDebugString(szTextBuffer);
	pRcvBuf = pRcvBuf->ipr_next;
}
return STATUS_SUCCESS;
}

Requirements

Header natedit.h
Library coredll.dll
Windows Embedded CE Windows CE 3.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also