3 # Parses DHCP options from openvpn to update resolv.conf
4 # To use set as 'up' and 'down' script in your openvpn *.conf:
5 # up /usr/lib/openvpn/update-resolv-conf
6 # down /usr/lib/openvpn/update-resolv-conf
8 # Used snippets of resolvconf script by Thomas Hood <jdthood@yahoo.co.uk>
10 # Licensed under the GNU GPL.
12 # 05/2006 chlauber@bnc.ch
14 # Example envs set from openvpn:
15 # foreign_option_1='dhcp-option DNS 193.43.27.132'
16 # foreign_option_2='dhcp-option DNS 193.43.27.133'
17 # foreign_option_3='dhcp-option DOMAIN be.bnc.ch'
19 [ -x /sbin/resolvconf ] || exit 0
24 for optionname in ${!foreign_option_*} ; do
25 option="${!optionname}"
27 part1=$(echo "$option" | cut -d " " -f 1)
28 if [ "$part1" == "dhcp-option" ] ; then
29 part2=$(echo "$option" | cut -d " " -f 2)
30 part3=$(echo "$option" | cut -d " " -f 3)
31 if [ "$part2" == "DNS" ] ; then
32 IF_DNS_NAMESERVERS="$IF_DNS_NAMESERVERS $part3"
34 if [ "$part2" == "DOMAIN" ] ; then
35 IF_DNS_SEARCH="$part3"
40 if [ "$IF_DNS_SEARCH" ] ; then
41 R="${R}search $IF_DNS_SEARCH
44 for NS in $IF_DNS_NAMESERVERS ; do
48 echo -n "$R" | /sbin/resolvconf -a "${dev}.inet"
51 /sbin/resolvconf -d "${dev}.inet"