Issue 139 in dpkt: Check if a given dpkt-layer is part of the packet

[dp...@googlecode.com]

Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 139 by anders.a...@gmail.com: Check if a given dpkt-layer is part
of the packet
https://code.google.com/p/dpkt/issues/detail?id=139

Is there a standard method for searching the data-portion of a packet for a
given layer?

I have started to build a decoder for EtherNet/IP. When I sniff packets I
usually need to filter for a given layer (ex. ForwardOpen etc). I did not
find a method for this so I created the following two methods in
dpkt.Packet:

dpkt.Packet.HasLayer( LayerClass )
dpkt.Packet.GetLayer( LayerClass )

They are basically recursive methods that check the Type of the data
attribute of the packet.

The first one return True/False if the layer is located somewhere in the
current packet, and the second of course return the layer in question (The
first on actually run the second).

I'm running Python 2.7.5 on windows 7 and 1.8 of dpkt.

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