PCAP.IsValidFilter

PCAP.IsValidFilter

Method signature

 Protected Function IsValidFilter(Expression As String, Optional ActiveCapture As PCAP.Capture) As Boolean

Parameters

Name	Type	Comment
Expression	String	A high-level filtering expression
ActiveCapture	Capture	Optional. The capture source. If not specified then a dummy capture using LinkType.NULL will be used.

Return value

Returns True if the Expression is a valid packet filter expression. If this method returns False you may check PCAP.Filter.LastCompileError for details.

Not all legal filter programs are valid for all possible capture sources.

See also

• PCAP.Filter.Compile