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From: gwh@lion.inmos.co.uk (Graham Hudspith)
Newsgroups: comp.protocols.tcp-ip.domains
Subject: Does anyone use RFC1101 ??
Message-ID: <14123@ganymede.inmos.co.uk>
Date: 29 Jan 91 16:44:46 GMT
References: sockets, BIND
Sender: news@inmos.co.uk
Reply-To: gwh@inmos.co.uk ()
Organization: INMOS Limited, Bristol, UK.
Lines: 77

I am working on an application which needs to implement the gethostent(3N)
and getnetent(3N) socket calls using a DNS. Using rfcs 1034 and 1035 I
have gotten gethostbyname() and gethostbyaddr() working.

It seems that rfc 1101 is purpose-built for my needs (to get
getnetbyname() and getnetbyaddr() working), but has anyone ever tried it?

I have acquired the source code for BIND v4.8 and have tried to mimic
the code for gethostby... to make getnetby... work.

Unfortunately, although getnetbyaddr() was fairly simple, by adding:

0.0.198.138.IN-ADDR.ARPA. PTR	br-ether.

to the named.revzone file, getnetbyname() is proving more difficult.
I have added a line:

br-ether.	PTR	0.0.198.138.IN-ADDR.ARPA.

to the named.zone file and called:

res_query("br-ether", C_IN, T_PTR, ...);

Although the DNS returns an answer with the string "0.0.198.138.IN-ADDR.ARPA"
present, it also indicates SERVFAIL in the return code. I don't want to
hack the code for the DNS - the software must work with any DNS,
so is there anyway I can hack the Resolver libraries to make the
getnetent(3N) calls work??

The DNS that I am using is the standard DNS supplied with SunOs 4.1, here are
the files:

::::::::::::::
/etc/named.boot
::::::::::::::
primary         inmos.co.uk             /etc/named.zone
primary         198.138.IN-ADDR.ARPA    /etc/named.revzone
::::::::::::::
/etc/named.revzone
::::::::::::::
198.138.IN-ADDR.ARPA.   IN      SOA eagle.inmos.co.uk. gwh.inmos.co.uk. (
								1.0010
								3600
								300
								360000
								3600   )
;
7.35            PTR     eagle.inmos.co.uk.
204.35          PTR     trout.inmos.co.uk.
;
0.0             PTR     br-ether.
::::::::::::::
/etc/named.zone
::::::::::::::
@               IN      SOA     eagle.inmos.co.uk. gwh.inmos.co.uk. (
								1.0010
								3600
								300
								360000
								3600   )
;
eagle           IN      A       138.198.35.7
		IN      HINFO   Sun-4/60        UNIX
trout           IN      A       138.198.35.204
		IN      HINFO   NCD             X-Terminal
;
br-ether.       PTR     0.0.198.138.IN-ADDR.ARPA.

Thanks for struggling through the article if you got this far!!

Graham Hudspith.


Graham W. Hudspith  INMOS Ltd, Bristol | EMail(UK) ukc!inmos!gwh
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