From 1ff834e2b06761b083df9959d6c3d6bd2a94d2de Mon Sep 17 00:00:00 2001
From: Shubham Saini <pryr@pryr.xyz>
Date: Tue, 1 Dec 2020 20:21:04 +0000
Subject: mah thinkpad

---
 bin/.bin/update-resolv-conf.sh | 71 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100755 bin/.bin/update-resolv-conf.sh

(limited to 'bin/.bin/update-resolv-conf.sh')

diff --git a/bin/.bin/update-resolv-conf.sh b/bin/.bin/update-resolv-conf.sh
new file mode 100755
index 0000000..16622a1
--- /dev/null
+++ b/bin/.bin/update-resolv-conf.sh
@@ -0,0 +1,71 @@
+#!/usr/bin/env 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 <jdthood@yahoo.co.uk>
+# and Chris Hanson
+# Licensed under the GNU GPL.  See /usr/share/common-licenses/GPL.
+# 07/2013 colin@daedrum.net Fixed intet name
+# 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'
+# foreign_option_4='dhcp-option DOMAIN-SEARCH bnc.local'
+
+## The 'type' builtins will look for file in $PATH variable, so we set the
+## PATH below. You might need to directly set the path to 'resolvconf'
+## manually if it still doesn't work, i.e.
+## RESOLVCONF=/usr/sbin/resolvconf
+export PATH=$PATH:/sbin:/usr/sbin:/bin:/usr/bin
+RESOLVCONF=$(type -p resolvconf)
+
+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" || "$part2" == "DOMAIN-SEARCH" ]] ; then
+        IF_DNS_SEARCH="$IF_DNS_SEARCH $part3"
+      fi
+    fi
+  done
+  R=""
+  if [ "$IF_DNS_SEARCH" ]; then
+    R="search "
+    for DS in $IF_DNS_SEARCH ; do
+      R="${R} $DS"
+    done
+  R="${R}
+"
+  fi
+
+  for NS in $IF_DNS_NAMESERVERS ; do
+    R="${R}nameserver $NS
+"
+  done
+  #echo -n "$R" | $RESOLVCONF -x -p -a "${dev}"
+  echo -n "$R" | $RESOLVCONF -x -a "${dev}.inet"
+  ;;
+down)
+  $RESOLVCONF -d "${dev}.inet"
+  ;;
+esac
+
+# Workaround / jm@epiclabs.io 
+# force exit with no errors. Due to an apparent conflict with the Network Manager
+# $RESOLVCONF sometimes exits with error code 6 even though it has performed the
+# action correctly and OpenVPN shuts down.
+exit 0
-- 
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