SetBufferSize Method of the IFWXConnection Interface

Article
08/13/2010

The SetBufferSize method sets the buffer size for a connection.

Syntax

HRESULT SetBufferSize(
  [in]  DWORD BufferSize
);

Parameters

BufferSize
Buffer size to be used for this connection.

Return Value

S_OK
The method succeeded.
E_INVALIDARG
Invalid value was passed to the method.

Remarks

This method allows you to modify the buffer size for a connection. By default, the service uses buffers of 4096 bytes for UDP and 2048 for TCP. UDP datagrams larger than the default buffer size are dropped by the service. Use this function to set a larger buffer size for protocols that use packets larger than 4096 bytes.

For TCP, the buffer size is used for optimization. In general, it should not be modified. For UDP, datagrams larger than the buffer size can be dropped. If the filter determines that larger datagrams can be transmitted, it should set the buffer size accordingly.

Requirements

Server	Requires Windows Server 2008 R2 or Windows Server 2008 x64 Edition with SP2.
Version	Requires Forefront Threat Management Gateway (TMG) 2010.
Header	Declared in Wspfwext.idl.
DLL	Requires Wspsrv.exe.

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