#!/bin/bash # # Parses DHCP options from openvpn to update resolv.conf # To use set as 'up' and 'down' script in your openvpn *.conf: # up /etc/openvpn/update-resolv-conf # down /etc/openvpn/update-resolv-conf # # Used snippets of resolvconf script by Thomas Hood # and Chris Hanson # Licensed under the GNU GPL. See /usr/share/common-licenses/GPL. # # 05/2006 chlauber@bnc.ch # # Example envs set from openvpn: # foreign_option_1='dhcp-option DNS 193.43.27.132' # foreign_option_2='dhcp-option DNS 193.43.27.133' # foreign_option_3='dhcp-option DOMAIN be.bnc.ch' [ -x /sbin/resolvconf ] || exit 0 case $script_type in up) for optionname in ${!foreign_option_*} ; do option="${!optionname}" echo $option part1=$(echo "$option" | cut -d " " -f 1) if [ "$part1" == "dhcp-option" ] ; then part2=$(echo "$option" | cut -d " " -f 2) part3=$(echo "$option" | cut -d " " -f 3) if [ "$part2" == "DNS" ] ; then IF_DNS_NAMESERVERS="$IF_DNS_NAMESERVERS $part3" fi if [ "$part2" == "DOMAIN" ] ; then IF_DNS_SEARCH="$IF_DNS_SEARCH $part3" fi fi done R="" for SS in $IF_DNS_SEARCH ; do R="${R}search $SS " done for NS in $IF_DNS_NAMESERVERS ; do R="${R}nameserver $NS " done echo -n "$R" | /sbin/resolvconf -a "${dev}.inet" ;; down) /sbin/resolvconf -d "${dev}.inet" ;; esac