[nos-bbs] AXUDP/AXIP - resolving (not) DOMAIN NAMES in autoexec.nos

[Jean Létourneau (VE2PKT)]

About AXUDP, I am trying to set a UDP link, there is my setup. similar
to Maiko example:
at now+0001 "attach axudp beaupt 256 va2bbs.homeip.net va2bbs-4 10093
10093"
at now+0002 "ifconfig beaupt desc \"vaebb2, quebec\""
at now+0003 "netrom interface beaupt 255 170"

If I do a ifconfig beaupt at the command prompt it show as AXIP not
AXUPD, is this normal?

And can I have more then 1 AXUDP link on the same port?

Thanks.
73 de Jean,
VE2PKT
 


Le lundi 04 février 2008 à 13:29 -0600, Maiko Langelaar (ve4klm) a
écrit :
> Greetings,
> 
> I just thought I would pass this tidbit of information out to the
> group. Did you know that if you try to pass a hostname in any of the
> autoexec.nos commands, resolution of that hostname will fail.
> 
> One could put the entry in their local DNS (domain.txt) file, but that
> is not practical in (most) cases where you would need to go out to the
> internet to get the information anyways.
> 
> The way JNOS works is that DNS query is not available until the entire
> autoexec.nos has been loaded and JNOS has entered it's main command loop,
> ready to accept commands at the console.
> 
> So what do we do ? Let's look at an AXUDP link to a DYNDNS remote host.
> 
> Suppose you have the following entry in your autoexec.nos :
> 
>    attach axudp werner 256 ve4wws.dyndns.org
>    ifconfig werner desc "wormhole to ve4wws"
> 
> After JNOS has finished loading autoexec.nos and is ready, you will
> probably not see the interface (port) called 'werner' when you run
> the ifconfig command at the console, or the Ports command at the
> mailbox prompt.
> 
> If the initial domain name query for 've4wws.dyndns.org' fails (which
> it will) when you run the attach, the interface is not created, and the
> subsequent ifconfig fails as well.
> 
> The only practical solution is to schedule the attach AFTER the JNOS
> system is up and running. You can use the JNOS 'at' command to run the
> attach and ifconfig a bit later. So, instead, you SHOULD use something
> like the following in your autoexec.nos :
> 
>    at now+0001 "attach axudp werner 256 ve4wws.dyndns.org"
>    at now+0002 "ifconfig werner desc \"wormhole to ve4wws\""
> 
> Of course that means you have to wait 1 minute after JNOS has restarted
> to make use of the AXUDP link and yet another minute after that to see
> the description for the port.
> 
> K2MF (Barry) has modified his MFNOS 'at' command to accept the use of
> seconds, ie: 'at ss', which I'm going to implement as well as a future
> feature. That way instead of waiting a minute or two, it's just a matter
> of waiting a few seconds instead.
> 
> That will work much better.
> 
> Maiko Langelaar / VE4KLM
> 
> 
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