[Bro-Dev] [JIRA] (BIT-1364) Bro does not attach UDP analyzers when signature matches after first packet

Jon Siwek (JIRA) jira at bro-tracker.atlassian.net
Mon Apr 6 14:00:01 PDT 2015

     [ https://bro-tracker.atlassian.net/browse/BIT-1364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jon Siwek updated BIT-1364:
    Resolution: Duplicate
        Status: Closed  (was: Open)

Duplicate of BIT-844.

I tested the patch mentioned in that ticket against the DTLS examples in this ticket and it seemed to work, please double check that if you can.

> Bro does not attach UDP analyzers when signature matches after first packet
> ---------------------------------------------------------------------------
>                 Key: BIT-1364
>                 URL: https://bro-tracker.atlassian.net/browse/BIT-1364
>             Project: Bro Issue Tracker
>          Issue Type: Problem
>          Components: Bro
>    Affects Versions: git/master
>            Reporter: Johanna Amann
>            Assignee: Jon Siwek
>            Priority: Low
>             Fix For: 2.4
>         Attachments: f1.pcap, f2.pcap
> At the moment, Bro only seems to attach UDP analyzers based on signatures, if the very first UDP packet matches the signature. Even if later UDP packets match the signature, the analyzer is not attached.
> The attachments contain a test case. f1.pcap contains a DTLS connection with a few STUN packets that are sent first, which is not recognized as DTLS. f2.pcap contains the same connection with the first few packets missing.
> It would probably be nice if one could at least opt to attach analyzers at a later time too, if a signature matches. (I know that 2.4 is probably a bit optimistic for this).

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