Re: SCTP howto?

[Daniel Roethlisberger <daniel () roe ch>]

David Fifield <david () bamsoftware com> 2009-01-21:
> On Wed, Jan 21, 2009 at 10:33:30PM +0100, Daniel Roethlisberger
> wrote:
> > I'm happy to announce that I checked in an initial version of
> > SCTP support into a newly created feature branch of Nmap
> > living at [1].  Right now, the branch is mostly equivalent to
> > my latest patchset from January 4th.
>
> I'm excited to try this out. Could you give or point to a howto
> for setting up an SCTP service? Like what kind of kernel
> configuration is required, and some trivial echo server or the
> like. The most fun I've been able to have so far is
>
> ./nmap -sY localhost All 36 scanned ports on localhost
> (127.0.0.1) are closed

As long as you aren't actually using any of the fancy features
like multihoming or multistreaming, using an SCTP socket is
pretty much the same as opening a TCP socket.  For testing, try
the simplistic sctp-discardd [1] which I've whipped up as a
reaction to your message.

svn://svn.insecure.org/nmap-exp/daniel/sctp-utils/sctp-discardd

> I think your patch implementing this will be helpful aside from
> enabling SCTP: it shows what are the common chunks of code that
> define each scan type. scan_engine.cc is, as you know,
> humongous and hard to work in. I'd like eventually to keep just
> the common code there and break everything scan-specific into
> separate files.

I do agree.  I was tempted to actually refactor all the protocol
specific stuff into a more modular code layout, but refrained
from doing so because it would have made merging a pain.

-- 
Daniel Roethlisberger
http://daniel.roe.ch/

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