linux-l: pppd - dynamische DNS-Adressen

[Jan-Benedict Glaw]

On Sun, Aug 13, 2000 at 07:33:09PM +0200, Rolf Buenning wrote:
Hallo Rolf!

> On Son, Aug 13, 2000 at 02:59:44 +0200, Jan-Benedict Glaw wrote:
> > On Sat, Aug 12, 2000 at 09:17:47PM +0200, Rolf Buenning wrote:
> > > Bei DNS1 stimmt es, aber DNS2 ist leer.
> [...]
> 
> Es bleibt dabei, ueber DNS2 bekomme ich nichts. :-(
> Koennte es daran liegen, dass remote statt ms-dns2 ...-dns3 uebergibt
> und der pppd damit nichts anfangen kann?
> Koenntest du mal nachsehen, was bei dir uebergeben wird?

Klaro. Ich bekomme auch ms-dns1 und ms-dns3 -- kein ms-dns2.

> Und wie? Es ist zwar nicht sehr schwierig (SuSE hat auch ein
> Beispielscript), aber wuerdest du mir mal da komplette script (oder den
> Teil mit der /etc/resolv.conf) mailen(PM)?

Ich häng's einfach mal an...

MfG, JBG

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#!/bin/sh

# 0dns-up by John Hasler 4 Apr 1999.  You may treat this program as if it
# was in the public domain.

# Rev. Dec 22 1999 to put dynaminc nameservers last.

# 0dns-up sets up /etc/resolv.conf for the provider being connected to.  In
# conjunction with pppd's usepeerdns option it also handles dynamic dns.
# It expects to be passed the provider name in PPP_IPPARAM.

# If pppconfig has been removed we are not supposed to do anything.

test -f /usr/sbin/pppconfig || exit 0

PROVIDER="$PPP_IPPARAM"
ETC="/etc"
PPPRESOLV="$ETC/ppp/resolv"
TEMPRESOLV="$ETC/resolv.conf.ppp.temp$$"
RESOLVBAK="$ETC/resolv.conf.ppp.bak"
RESOLVCONF="$ETC/resolv.conf"

# We better not do anything if resolv.conf.bak already exists.

test -f "$RESOLVBAK" && exit 0

# Put the resolv.conf for this provider (if it exists) in a temp file.
# If we are using dynamic dns it will be empty or contain any resolver
# options the user added.  Otherwise it will be a complete resolv.conf for
# this provider.

test -f "$PPPRESOLV/$PROVIDER" && cat $PPPRESOLV/$PROVIDER > $TEMPRESOLV

# USEPEERDNS, DNS1, and DNS2 are variables exported by pppd.  Do we have
# usepeerdns and a couple of nameservers?  If so, put a couple of
# nameserver lines in the temp file.

if [ "$USEPEERDNS" ] && [ "$DNS1" ] ; then
    echo -e "\nnameserver $DNS1" >> $TEMPRESOLV
    if [ "$DNS2" ] ; then
	echo -e "\nnameserver $DNS2" >> $TEMPRESOLV
    fi
fi

# If we haven't created TEMPRESOLV by now, just exit.

test -f $TEMPRESOLV || exit 0

# Back up resolv.conf.

cp $RESOLVCONF $RESOLVBAK

# And replace it with the new resolv.conf from the temp file.

mv $TEMPRESOLV $RESOLVCONF
chmod 644 $RESOLVCONF
exit 0
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#!/bin/sh

# 0dns-down by John Hasler 4 Apr 1999.  You may treat this program as if it
# was in the public domain.

# 0dns-down takes down what 0dns-up sets up.

# If pppconfig has been removed we are not supposed to do anything.

test -f /usr/sbin/pppconfig || exit 0

ETC="/etc"
RESOLVBAK="$ETC/resolv.conf.ppp.bak"
RESOLVCONF="$ETC/resolv.conf"

test -f "$RESOLVBAK" && mv $RESOLVBAK $RESOLVCONF
chmod 644 $RESOLVCONF
exit 0
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