dialup, nechodi dns (delsi)

[Karel Vyskočil]

>
> Tip: man pppd
>
>        usepeerdns
>               Ask the peer for up to 2 DNS server addresses.  The
>               addresses  supplied by the peer (if any) are passed
>               to the /etc/ppp/ip-up  script  in  the  environment
>               variables  DNS1  and  DNS2.  In addition, pppd will
>               create an /etc/ppp/resolv.conf file containing  one
> ^^^^^^^^^^^^^^^^^^^^
>               or  two  nameserver lines with the address(es) sup­
>               plied by the peer.
>
> Podle toho pppd sice ten soubor vytvori, ale v adresari ppp, takze by
> mozna pomohlo zkopirovat ho potom nejakym skriptem do /etc.
>
> J.G.

Jo jo /etc/ppp/resolv.conf se opravdu vytvori a zapise se tam ip dns serveru
meho isp. Myslel sem, ze na to, aby se tyto informace zapsali do
/etc/resolv.conf tak zde jsou skripty /etc/ppp/ip-up a
/etc/sysconfig/network-skripts/ifup-post.
Ja tem skriptum moc nerozumim (jsem BFU). Mohl by se na to nekdo mrknout a
rict mi jestli je to opravdu k tomu co si myslim a je tu nekde nejaka
drobnost proc to neudela zmeny v /etc/resolv.conf, nebo sem uplne vedle.
Jsou to skripty, ktere zde jsou normalne po instalaci RH7.1cz. Zde je jejich
vypis:

/etc/ppp/ip-up:

#!/bin/bash

# This file should not be modified -- make local changes to
# /etc/ppp/ip-up.local instead

LOGDEVICE=$6
REALDEVICE=$1

export PATH=/sbin:/usr/sbin:/bin:/usr/bin

[ -f /etc/sysconfig/network-scripts/ifcfg-${LOGDEVICE} ] &&
/etc/sysconfig/network-scripts/ifup-post ifcfg-${LOGDEVICE}

[ -x /etc/ppp/ip-up.local ] && /etc/ppp/ip-up.local "$@"

exit 0



a /etc/sysconfig/network-skripts/ifup-post:

#!/bin/sh

cd /etc/sysconfig/network-scripts
. network-functions

need_hostname
CONFIG=$1
source_config

DEVICETYPE=`echo $DEVICE | sed "s/[0-9]*$//"`
REALDEVICE=`echo $DEVICE | sed 's/:.*//g'`
if echo $DEVICE | grep -q ':' ; then
    ISALIAS=yes
else
    ISALIAS=no
fi

if [ "$ISALIAS" = no ] ; then
    /etc/sysconfig/network-scripts/ifup-aliases ${DEVICE}
fi

/etc/sysconfig/network-scripts/ifup-routes ${DEVICE}


if [ "$PEERDNS" != "no" -o -n "$RESOLV_MODS" -a "$RESOLV_MODS" != "no" ];
then
  [ -n "$MS_DNS1" ] && DNS1=$MS_DNS1
  [ -n "$MS_DNS2" ] && DNS2=$MS_DNS2
  if [ -n "$DNS1" ] && ! grep -q "^nameserver $DNS1" /etc/resolv.conf &&
   tr=`mktemp /tmp/resolv.XXXXXX` ; then
    # replace only the first two nameserver lines; cannot count on awk
    # and do not know if sed is capable of this...
    current_replacement="$DNS1"
    next_replacement="$DNS2"
    search=
    (cat /etc/resolv.conf ; echo EOF ; echo EOF) | while read answer ; do
 case $answer in
     nameserver*|EOF)
  if [ -n "$current_replacement" ] ; then
      echo "nameserver $current_replacement" >> $tr
      if [ -n "$next_replacement" ] ; then
   current_replacement="$next_replacement"
   next_replacement=
      else
   current_replacement=
      fi
  else
      if [ "$answer" != EOF ] ; then
   echo "$answer" >> $tr
      fi
  fi
  ;;
     domain*|search*)
         if [ -n "$DOMAIN" ]; then
             echo "$answer" | while read key value ; do
          search="$search $value"
      done
  else
      echo "$answer" >> $tr
  fi
  ;;
     *)
  echo "$answer" >> $tr
  ;;
 esac
 if [ -n "$DOMAIN" ]; then
    echo "search $DOMAIN $search" >> $tr
 fi
    done

    # backup resolv.conf
    cp -af /etc/resolv.conf /etc/resolv.conf.save

    # maintain permissions
    # but set umask in case it doesn't exist!
    oldumask=`umask`
    umask 022
    cat $tr > /etc/resolv.conf
    rm -f $tr
    umask $oldumask
  fi
fi

FWACTIVE=
if [ -f /etc/sysconfig/ipchains -a "`ipchains -L input -n 2>&1 | awk 'END
 print NR }'`" -gt 1 ]; then
        FWACTIVE=1
 export FWACTIVE
fi

if [ "$FIREWALL_MODS" != "no" -a -n "$FWACTIVE" ]; then
 ns=`awk '/^nameserver / { print $2 }' /etc/resolv.conf`
 if [ -n "$ns" ]; then
  for nameserver in $ns ; do
   if ! ipchains -L input -n | grep -q $nameserver ; then
    ipchains -I input -s $nameserver/32 53 -p udp -j ACCEPT
    logger $"punching nameserver $nameserver through the firewall"
   fi
  done
 fi
fi

# don't set hostname on ppp/slip connections
if [ "$2" = "boot" -a -n "$NEEDHOSTNAME" -a "${DEVICE}" != lo -a
"${DEVICETYPE}" != "ppp" -a "${DEVICETYPE}" != "slip" ]; then
    IPADDR=`LANG= LC_ALL= ifconfig ${DEVICE} | grep 'inet addr' |
     awk -F: '{ print $2 } ' | awk '{ print $1 }'`
    eval `/bin/ipcalc --silent --hostname ${IPADDR}`
    if [ "$?" = "0" ]; then
     set_hostname $HOSTNAME
    fi
fi

# Notify programs that have requested notification
do_netreport

if [ -x /sbin/ifup-local ]; then
    /sbin/ifup-local ${DEVICE}
fi

exit 0


Moc dekuji, s pozdravem Karel.
--
Karel Vyskočil
karel1 na students.zcu.cz