libpcap filters

["Pinkney, John" <John.Pinkney () spirentcom com>]

Hi

I am looking at adding Frame Relay into libpcap including filtering support.

With Frame Relay supporting long and short versions of the NLPID
encapsulation, it means that the network layer can start at different
offsets.

Is it possible for the filtering code to handle variable network layer
offsets on a single DLT type?

Looking at the gencode.c it looks like it might be possible but I am quite
new to the code and would appreciate any pointers of where to start.


Thanks in advance
John
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