Wireshark mailing list archives
Re: Regarding display filter- how to redesign code to incorporate expressions other than protocols?
From: Guy Harris <guy () alum mit edu>
Date: Sat, 19 Apr 2014 12:12:35 -0700
On Apr 19, 2014, at 11:58 AM, Ateeth Kumar Thirukkovulur <athirukkovulur () uh edu> wrote:
Not exactly. Suppose I want to include a NOT operator in the display filter. Say "! tcp". Which code must I change? I know it already exists. Where do I include the symbols n expressions for newly added terms. Do you get what I am saying?
No, not really. If you mean "how do I support new operators in packet-matching expressions", you'd: change epan/dfilter/scanner.l to add the new operator as a lexical-analyzer token; change epan/dfilter/grammar.lemon to handle that token as part of the grammar, translating them into new "instructions" in the "display filter virtual machine"; change epan/dfilter/dfvm.c to support those new "instructions". If you mean "how do I support some particular *type* of new operators", you'd need to tell us what those new operators are and what semantics they have, so we can indicate what *particular* changes would be needed to those files. ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- Regarding display filter- how to redesign code to incorporate expressions other than protocols? Ateeth Kumar Thirukkovulur (Apr 18)
- Re: Regarding display filter- how to redesign code to incorporate expressions other than protocols? Guy Harris (Apr 18)
- Re: Regarding display filter- how to redesign code to incorporate expressions other than protocols? Ateeth Kumar Thirukkovulur (Apr 19)
- Re: Regarding display filter- how to redesign code to incorporate expressions other than protocols? Guy Harris (Apr 19)
- Re: Regarding display filter- how to redesign code to incorporate expressions other than protocols? Ateeth Kumar Thirukkovulur (Apr 20)
- Re: Regarding display filter- how to redesign code to incorporate expressions other than protocols? Ateeth Kumar Thirukkovulur (Apr 19)
- Re: Regarding display filter- how to redesign code to incorporate expressions other than protocols? Guy Harris (Apr 18)