├── update-resolv-conf.sh
└── update-resolv-conf.sh.readme


/update-resolv-conf.sh:
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 1 | #!/usr/bin/env bash
 2 | #
 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 /etc/openvpn/update-resolv-conf
 6 | # down /etc/openvpn/update-resolv-conf
 7 | #
 8 | # Used snippets of resolvconf script by Thomas Hood <jdthood@yahoo.co.uk>
 9 | # and Chris Hanson
10 | # Licensed under the GNU GPL.  See /usr/share/common-licenses/GPL.
11 | # 07/2013 colin@daedrum.net Fixed intet name
12 | # 05/2006 chlauber@bnc.ch
13 | #
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'
18 | # foreign_option_4='dhcp-option DOMAIN-SEARCH bnc.local'
19 | 
20 | ## The 'type' builtins will look for file in $PATH variable, so we set the
21 | ## PATH below. You might need to directly set the path to 'resolvconf'
22 | ## manually if it still doesn't work, i.e.
23 | ## RESOLVCONF=/usr/sbin/resolvconf
24 | export PATH=$PATH:/sbin:/usr/sbin:/bin:/usr/bin
25 | RESOLVCONF=$(type -p resolvconf)
26 | 
27 | case $script_type in
28 | 
29 | up)
30 |   for optionname in ${!foreign_option_*} ; do
31 |     option="${!optionname}"
32 |     echo $option
33 |     part1=$(echo "$option" | cut -d " " -f 1)
34 |     if [ "$part1" == "dhcp-option" ] ; then
35 |       part2=$(echo "$option" | cut -d " " -f 2)
36 |       part3=$(echo "$option" | cut -d " " -f 3)
37 |       if [ "$part2" == "DNS" ] ; then
38 |         IF_DNS_NAMESERVERS="$IF_DNS_NAMESERVERS $part3"
39 |       fi
40 |       if [[ "$part2" == "DOMAIN" || "$part2" == "DOMAIN-SEARCH" ]] ; then
41 |         IF_DNS_SEARCH="$IF_DNS_SEARCH $part3"
42 |       fi
43 |     fi
44 |   done
45 |   R=""
46 |   if [ "$IF_DNS_SEARCH" ]; then
47 |     R="search "
48 |     for DS in $IF_DNS_SEARCH ; do
49 |       R="${R} $DS"
50 |     done
51 |   R="${R}
52 | "
53 |   fi
54 | 
55 |   for NS in $IF_DNS_NAMESERVERS ; do
56 |     R="${R}nameserver $NS
57 | "
58 |   done
59 |   #echo -n "$R" | $RESOLVCONF -x -p -a "${dev}"
60 |   echo -n "$R" | $RESOLVCONF -x -a "${dev}.inet"
61 |   ;;
62 | down)
63 |   $RESOLVCONF -d "${dev}.inet"
64 |   ;;
65 | esac
66 | 
67 | # Workaround / jm@epiclabs.io 
68 | # force exit with no errors. Due to an apparent conflict with the Network Manager
69 | # $RESOLVCONF sometimes exits with error code 6 even though it has performed the
70 | # action correctly and OpenVPN shuts down.
71 | exit 0
72 | 


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/update-resolv-conf.sh.readme:
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1 | Source: https://github.com/masterkorp/openvpn-update-resolv-conf
2 | 


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