Xref: utzoo comp.os.vms:38199 comp.protocols.tcp-ip:15751
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!mcsun!ukc!strath-cs!str-va!cnbs06
From: cnbs06@vaxa.strath.ac.uk (Bruce Rodger.)
Newsgroups: comp.os.vms,comp.protocols.tcp-ip,vmsnet.networks.tcp-ip.misc
Subject: UCX server implementation problem
Message-ID: <1991Apr19.104106.11439@vaxa.strath.ac.uk>
Date: 19 Apr 91 10:41:06 GMT
Organization: the R473 Lunatic Asylum
Lines: 40


We are currently trying to port Geoff Huston's ANU-NEWS server to run under 
UCX. We are having one major problem - how to start a new server process 
each time a TCP call is received on the news server port (conventionally 
port 119), and assign that stream to that process.

Under Unix, it would be straightforward - you would just add an entry to 
/etc/services, specifying the program to be run when a call is received. 
Similarly, under CMU TCP and WIN TCP, you would modify 
sys$manager:internet.config or twg$tcp:[netdist.etc]servers.dat & 
twg$tcp:[netdist.etc]services respectively. Under multinet, you would use 
the $Multinet config/server command, and even under DECnet, you could use 
NCP. But how do you do this sort of thing under UCX ?

My own feeling is that it can't be done in this way - there is no mention 
of anything like this in the UCX manuals. We'll probably have to take an 
approach similar to that used by the UCX FTP utility - a daemon (UCX$FTPD) 
runs as a detached process, "listening" to the appropriate port. When an 
incoming call is detected, a server process (UCX$FTPC) is created, and the 
logical stream assigned to this process.

Obviously what we require is a program to performa function similar to the 
UCX$FTPD program.

However, as we don't have the source code for UCX$FTPD available, I'm 
unsure how to go about writing the news_daemon. In particular, how is the 
new process created, and how is the stream assigned to that process ?

Any information or example code would be gratefully received!


Bruce.

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