Wireshark-bugs: [Wireshark-bugs] [Bug 12240] Interpretation of BGP NLRI for default route cause
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 08 Mar 2016 15:19:14 +0000

Comment # 6 on bug 12240 from 
(In reply to Alexis La Goutte from comment #5)
> (In reply to Uli Heilmeier from comment #3)
> > After removing the lines
> > 
> > 1974         if( prefix_len == 0) {
> > 1975             return 1; /* prefix length is zero (i.e. matching all IP
> > prefixes) and remaining bytes within the NLRI is greater than or equal to 1
> > -      may be BGP add-path */
> > 1976         }
> > 
> > in epan/dissectors/packet-bgp.c the default routes are parsed without any
> > issue.
> 
> Thanks Uli for analyze 
> We need to found a better solution for support
> https://tools.ietf.org/html/draft-ietf-idr-add-paths

It seems like a false positive in the presented piece of code. The function
should return 1 only if there are remaining octets after prefix length field.
Maybe 'end' variable set to invalid value earlier in the code.

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