Re: nmap-poll branch results

[David Fifield <david () bamsoftware com>]

On Wed, Aug 26, 2009 at 04:01:10PM +0200, Florian Vichot wrote:
> I realise I may be a little late to the conversation, but why not use
> something like libevent (http://www.monkey.org/~provos/libevent/)?
>
> It provides an abstraction layer for select and poll, as well as more
> advanced options like epoll and kqueue, and event ports on Solaris. It
> also supports Windows. It's a well maintained, BSD-licensed library,
> used by Honeyd and Tor.
>
> Any reason why not ?

Nsock and libevent are libraries with a similar purpose. I haven't used
libevent but I bet it could be made to do most of what we use Nsock for.
There hasn't been any compelling reason to want to switch from Nsock
though, and Nsock's use of select has been performant enough for what we
use it for. The problem we ran into lately is that select can only
handle a certain number of file descriptors, which can affect people
running big and fast scans.

Here is a comparison of the two libraries written by Nmap developer
Marek Majkowski.

http://popcnt.org/2007/11/trinity-choice-nsock-over-libevent.html

David Fifield

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