Re: Call for testers: poll and kqueue-based nsock engines

[Henri Doreau <henri.doreau () gmail com>]

2012/8/8 Henri Doreau <henri.doreau () gmail com>:
> Hello,
>
> The aim of the nsock-engine subsystem was to let most supported OS
> leverage the high performance I/O notification facilities they have,
> without breaking compatibility between them[1].
>
> So far, only Linux benefits it, with a epoll-based engine (see
> nsock/src/engine_epoll.c). Other operating systems fallback on the old
> select(2) engine.
>
> I developed two new engines, that (should) bring improvements to a
> handful of OS's.
>
> The first one is based on poll(2). It should basically work everywhere
> (even on windows!). Its efficiency is similar to select() but it
> doesn't suffer any hardcoded limit of manageable sockets. On windows,
> some others and unrelated scalability limitations have been
> highlighted recently[2], but I decided to leave the compatibility
> code.
>
> The second one is based on kqueue(2), which BSDs usually provide
> (i.e.: Mac OS, FreeBSD, OpenBSD and NetBSD, to the best of my
> knowledge). This engine, with FreeBSD, has shown very good
> performances during my tests.
>
> You can get the code at: https://svn.nmap.org/nmap-exp/henri/nsock-newengines
>
> Once compiled you can use --nsock-engine=poll (almost everywhere I
> guess) and --nsock-engine=kqueue (on BSDs) in nmap, nping and ncat to
> enforce the use of a specific engine. Note that not all nmap phases
> use nsock (typically: simple port scanning doesn't, version and script
> scan do).
>
> Feedback welcome!
>
> Regards.
>
> [1] http://seclists.org/nmap-dev/2011/q3/143
> [2] http://seclists.org/nmap-dev/2012/q3/190

Hello,

any opinion on this? I'd like to merge it at some point if there's an
agreement on it. For the sake of stability, the earlier in the release
cycle the better.

Regards.

-- 
Henri
_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://seclists.org/nmap-dev/