[openbeosnetteam] Re: DHCP Client needed,what would stand in the way?

  • From: "Waldemar Kornewald" <Waldemar.Kornewald@xxxxxx>
  • To: openbeosnetteam@xxxxxxxxxxxxx
  • Date: Thu, 24 Jul 2003 13:10:34 +0200 CEST

Axel Dörfler <"Axel Dörfler" <axeld@xxxxxxxxxxxxxxxx>> wrote:> 
"Waldemar Kornewald" <Waldemar.Kornewald@xxxxxx> wrote:
> > Please do not forget that some interfaces want to set up a 
> > nameserver 
> > from
> > kernel-level. ;)
> > There should be some better way to set up the nameservers than 
> > writing an
> > entry into resolv.conf like Syllable's dhcp.
> 
> Why? It has to be read out everytime a DNS is to be resolved anyway 
> (at 
> least if we keep using it this way).

Because you surely do not want to keep that DNS entry after you 
disconnect, the connection is lost, or your system crashes. ;)
Alternatively, we could have a "/etc/dynamic-resolv.conf" which is 
cleared on boot-up.
A more error-safe and easier system would still be better, IMHO.
Why are dynamic/static attributes not good for this?
The static attributes get saved (on each change) to /etc/netsettings or 
~/config/settings/kernel/netsettings.
There would be a nameservers section:

nameservers {
        ipv4 129.24.234.12
        ipv6 a:b:c:d:e:.....
}

# and maybe some other sections (not important, just to visualize my 
idea)

interfaces {
        eth0 {
                ipv4    192.168.0.1
        }
}

Dynamic attributes would only live in memory and never saved.
A simple piece of code:
dns_manager->RemoveAttributeAt(dns_manager->IndexOfValue("ipv4", 
mydns));
would remove that nameserver when the interface disconnects (for 
whatever reason).
A system crash is no problem because the entries are not saved to disk. 
Thus, no need for clearing a file at boot-up. ;)

Just a suggestion. :)
This is roughly what I had in mind for DNS.

Waldemar

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