[Bro-Dev] [JIRA] (BIT-1363) Clustered AF_PACKET support

[Michal Purzynski (JIRA)]

    [ https://bro-tracker.atlassian.net/browse/BIT-1363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=22300#comment-22300 ] 

Michal Purzynski commented on BIT-1363:
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After talking with some people who implemented both libpcap based and raw af_packet functionality recently and testing it myself, I've learned one cannot simply add fanout options to a socket services by libpcap and expect it to work.

If we want fanout we have to use af_packet directly.

Libpcap when opened by multiple processes will deliver the same packets to each of them. Adding fanout changes nothing.

> Clustered AF_PACKET support
> ---------------------------
>
>                 Key: BIT-1363
>                 URL: https://bro-tracker.atlassian.net/browse/BIT-1363
>             Project: Bro Issue Tracker
>          Issue Type: New Feature
>          Components: Bro
>    Affects Versions: git/master
>            Reporter: Michal Purzynski
>
> Let's have a support for packet capture with the AF_PACKET sockets in multi worker configuration.
> Bro can use a single worker with af_packet, I have tested and it works, but having a direct support for multi-worker load balancing would allow to avoid the pf_ring for many deployments with the traffic level where DNA / ZC / Myricom / DAG is not required.



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