[sane-devel] saned.conf hostname format

[Sebastien Sable]

Hello,

Henning Meier-Geinitz <henning at meier-geinitz.de> writes:

> With "vortex" in saned.conf:
> 
> Sep 21 21:38:20 hmg1 saned[20554]: my name: hmg1 
> Sep 21 21:38:20 hmg1 saned[20554]: checking for: vortex 
> Sep 21 21:38:20 hmg1 saned[20554]: peer name: vortex 
> Sep 21 21:38:20 hmg1 saned[20554]: peer name alias: vortex.swb.de 
> Sep 21 21:38:20 hmg1 saned[20554]: access by root at vortex accepted 
> 
> So it finds the name for both cases, name and alias.

With "incubus.snv.jussieu.fr" in saned.conf:

Sep 24 14:26:56 inova saned[17031]: checking for: incubus.snv.jussieu.fr 
Sep 24 14:26:56 inova saned[17031]: peer name: incubus.snv.jussieu.fr 
Sep 24 14:26:56 inova saned[17031]: access by saned-user at incubus.snv.jussieu.fr accepted 
Sep 24 14:27:34 inova saned[17031]: exiting 

With "incubus" in saned.conf:

Sep 24 14:27:55 inova saned[17037]: checking for: incubus 
Sep 24 14:27:55 inova saned[17037]: peer name: incubus.snv.jussieu.fr 
Sep 24 14:27:55 inova saned[17037]: access by saned-user at incubus.snv.jussieu.fr rejected 
Sep 24 14:27:55 inova saned[17037]: exiting

> The difference seems to be that for me the peer name is sent without
> the domain. 

My gethostbyaddr seems to give the peer name with the domain, and no
alias...  The version of libc on my computer is the GNU C Library
2.2.4 provided in Debian without any change, so something rather
common and recent.

I searched for 'gethostbyaddr' in GNU libc bugs page and found
nothing.

Looking at bugs.debian.org for libc6, one of the bugs is :

   I use telnetd-ssl (0.17.13+0.1-1) on a testing machine, that is in
   a small home lan (4 pc's + 1 laptop, all with debian): when I
   upgraded libc6 to the latest revision available (2.2.4-1), I
   couldn't telnet anymore to that machine, nor locally (telnet
   localhost or telnet <name> or telnet 192.168.0.10) neither from the
   other pc's. The message says that the connection is refused by host
   and i get the prompt; if i try again, telnet-ssl/telnet hangs and
   <CTRL-c> doesn't work, i must kill it from another vt.
   
   I downgraded libc6 to the previous revision (2.2.3-9) and the
   problem disappeared; I also changed telnetd-ssl with telnet and it
   worked.

I don't know if this is related, but maybe gethostbyaddr as changed
its behaviour in recent versions of libc?
There must be a correct way to use it however since most of my network
programs (ssh, telnet, ftp...) work correctly with short names (well,
they don't use something as saned.conf either).

bye

-- 
Sébastien Sablé <Sebastien.Sable at snv.jussieu.fr>
http://inova.snv.jussieu.fr/~sable/