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To: Charles Mott <cmott@srv.net>
cc: Eivind Eklund <eivind@dimaga.com>, ari.suutari@carel.fi,
        hackers@freebsd.org
Subject: Re: ipdivert & masqd 
In-reply-to: Your message of "Wed, 22 Jan 1997 13:46:18 MST."
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Date: Wed, 22 Jan 1997 21:24:42 +0000
From: Brian Somers <brian@awfulhak.demon.co.uk>
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> Brian,
> 
> I am travelling right now (this is from a university terminal that I 
> stopped by).  Regarding the IP checksum -- in version 1.8, I went 
> todifferential checksumming which will not work as I see it described 
> with one cirection of the divert socket.
> 
> Definetly people should try to test Ari's natd, I think.  I am still in 
> 2.1.0-R and therefore too backwrrads to test it.
> 
> Charles Mott

The masqd code now works.  It passes the packet to PacketAlias{In|Out}()
with a potentially zero'd ip_sum (PacketAliasIn() packets) and recomputes
a zero sum afterwards.  The only other thing needed was a call to
SetAliasAddress().

Any feedback from people would be great - the code can be found on
www.awfulhak.demon.co.uk.

Perhaps it might be a good idea to make an "alias" library out of this stuff,
that way, it can be ported to different environments easily.  So far, the
code written is rather trivial - it screams to be a library !

I'll write again when I've polished the code (and maybe written a man page).

I havn't seen the natd code yet - I've seen reports that it's difficult to
get to the web page it's on ;(  However, I like masqd hugely as it's so
simple.

-- 
Brian <brian@awfulhak.demon.co.uk>, <brian@freebsd.org>
      <http://www.awfulhak.demon.co.uk/>
Don't _EVER_ lose your sense of humour....