Re: "not vlan" filter expression broken catastrophically!

[Ani Sinha <ani () aristanetworks com>]

In this case, I have used a tool written by Bill Fenner called
BpfExpression for Arista. Not sure if the code is GNU licensed. He's
in the mailing list and I will let him comment.

ani


On Fri, Feb 1, 2013 at 5:07 PM, Michael Richardson <mcr () sandelman ca> wrote:
> > > > > > "Ani" == Ani Sinha <ani () aristanetworks com> writes:
>     Ani> hello folks :
>
>     Ani> As you guys have been aware, I am hacking libpcap for a
>     Ani> while. Me and Bill noticed something seriously broken for any
>     Ani> filter expression that has a "not vlan" in it. For example,
>     Ani> take a look at the filter code generated by libpcap with an
>     Ani> expression like "not vlan and tcp port 80" :
>
>     Ani> BpfExpression '(not vlan and tcp port 80)' { 0x28, 0, 0,
>
> Do we have any way to test libpcap expression outputs other than -d
> options to tcpdump?  I'm thinking regression tests here.
>
> --
> ]               Never tell me the odds!                 | ipv6 mesh networks [
> ]   Michael Richardson, Sandelman Software Works        | network architect  [
> ]     mcr () sandelman ca  http://www.sandelman.ca/        |   ruby on rails    [
>
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