diff options
Diffstat (limited to 'debian/update-resolv-conf')
| -rw-r--r-- | debian/update-resolv-conf | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/debian/update-resolv-conf b/debian/update-resolv-conf new file mode 100644 index 0000000..61b15d9 --- /dev/null +++ b/debian/update-resolv-conf @@ -0,0 +1,63 @@ +#!/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. +# +# 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' +# + +if [ ! -x /sbin/resolvconf ] ; then + logger "[OpenVPN:update-resolve-conf] missing binary /sbin/resolvconf"; + exit 0; +fi + +[ "$script_type" ] || exit 0 +[ "$dev" ] || exit 0 + +split_into_parts() +{ + part1="$1" + part2="$2" + part3="$3" +} + +case "$script_type" in + up) + NMSRVRS="" + SRCHS="" + foreign_options=$(printf '%s\n' ${!foreign_option_*} | sort -t _ -k 3 -g) + for optionvarname in ${foreign_options} ; do + option="${!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 + |