#!/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/leap/update-resolv-conf # down /etc/leap/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. # # 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 [ "$script_type" ] || exit 0 [ "$dev" ] || exit 0 split_into_parts() { part1="$1" part2="$2" part3="$3" } case "$script_type" in up) NMSRVRS="" SRCHS="" for optionvarname in ${!foreign_option_*} ; do option="${!optionvarname}" echo "$option" split_into_parts $option if [ "$part1" = "dhcp-option" ] ; then if [ "$part2" = "DNS" ] ; then NMSRVRS="${NMSRVRS:+$NMSRVRS }$part3" elif [ "$part2" = "DOMAIN" ] ; then SRCHS="${SRCHS:+$SRCHS }$part3" fi fi done R="" [ "$SRCHS" ] && R="search $SRCHS " for NS in $NMSRVRS ; do R="${R}nameserver $NS " done echo -n "$R" | /sbin/resolvconf -a "${dev}.openvpn" ;; down) /sbin/resolvconf -d "${dev}.openvpn" ;; esac