Re: RLP


Philip A. Prindeville (PAP4@AI.AI.MIT.EDU)
Mon, 27 Jul 87 02:54:18 EDT


Yes, I wrote an RLP server for the FTP Software, Inc. `PC/TCP' package.
I spoke to Mike Acceta when I wrote it, and apparently, we are the only
implementors of it. It hasn't proved very popular.

One extension we discussed was to add unsolicited <I-Provide> packets for
(non-RLP) servers wishing to advertise their services. For instance, a
domain name server might send out a periodic broadcast "<who-provides> RLP"
query, then send to the servers from that answer a message "<I-provide>
DOMAIN" reply.

The servers that strictly follow the spec will discard this as being a
bogus packet (and hopefully not crash); a smart server might save this
info and use it later.

I like the protocol. I'm suprised it hasn't been accepted. It's
not Clearinghouse, but then it didn't try to be. When I have some time,
I will do an implementation for 4.3BSD...

It would be really neat if (on UNIX) you didn't need /etc/printcap to
list all the various local printers, but could use RLP to locate a
printer with suitable qualities... Real Soon Now.

-Philip



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