From 3e4d8f433239c40311037616b1b8833a06651ae0 Mon Sep 17 00:00:00 2001
From: Arne Schwabe <arne@rfc2549.org>
Date: Mon, 16 Apr 2012 19:21:14 +0200
Subject: Initial import

---
 openvpn/contrib/pull-resolv-conf/client.down |  47 +++++++++++++
 openvpn/contrib/pull-resolv-conf/client.up   | 101 +++++++++++++++++++++++++++
 2 files changed, 148 insertions(+)
 create mode 100644 openvpn/contrib/pull-resolv-conf/client.down
 create mode 100644 openvpn/contrib/pull-resolv-conf/client.up

(limited to 'openvpn/contrib/pull-resolv-conf')

diff --git a/openvpn/contrib/pull-resolv-conf/client.down b/openvpn/contrib/pull-resolv-conf/client.down
new file mode 100644
index 00000000..05f2d4d5
--- /dev/null
+++ b/openvpn/contrib/pull-resolv-conf/client.down
@@ -0,0 +1,47 @@
+#!/bin/sh
+
+# Copyright (c) 2005-2010 OpenVPN Technologies, Inc.
+# Licensed under the GPL version 2
+
+# First version by Jesse Adelman
+# someone at boldandbusted dink com
+# http://www.boldandbusted.com/
+
+# PURPOSE: This script automatically removes the /etc/resolv.conf entries previously
+# set by the companion script "client.up".
+
+# INSTALL NOTES:
+# Place this in /etc/openvpn/client.down
+# Then, add the following to your /etc/openvpn/<clientconfig>.conf:
+#   client
+#   up /etc/openvpn/client.up
+#   down /etc/openvpn/client.down
+# Next, "chmod a+x /etc/openvpn/client.down"
+
+# USAGE NOTES:
+# Note that this script is best served with the companion "client.up"
+# script.
+
+# Tested under Debian lenny with OpenVPN 2.1_rc11
+# It should work with any UNIX with a POSIX sh, /etc/resolv.conf or resolvconf
+
+# This runs with the context of the OpenVPN UID/GID 
+# at the time of execution. This generally means that
+# the client "up" script will run fine, but the "down" script
+# will require the use of the OpenVPN "down-root" plugin
+# which is in the plugins/ directory of the OpenVPN source tree
+
+# A horrid work around, from a security perspective,
+# is to run OpenVPN as root. THIS IS NOT RECOMMENDED. You have
+# been WARNED.
+PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin
+
+if type resolvconf >/dev/null 2>&1; then
+  resolvconf -d "${1}" -f
+elif [ -e /etc/resolv.conf.ovpnsave ] ; then
+  # cp + rm rather than mv in case it's a symlink
+  cp /etc/resolv.conf.ovpnsave /etc/resolv.conf
+  rm -f /etc/resolv.conf.ovpnsave
+fi
+
+exit 0
diff --git a/openvpn/contrib/pull-resolv-conf/client.up b/openvpn/contrib/pull-resolv-conf/client.up
new file mode 100644
index 00000000..b28d4d19
--- /dev/null
+++ b/openvpn/contrib/pull-resolv-conf/client.up
@@ -0,0 +1,101 @@
+#!/bin/sh
+
+# Copyright (c) 2005-2010 OpenVPN Technologies, Inc.
+# Licensed under the GPL version 2
+
+# First version by Jesse Adelman
+# someone at boldandbusted dink com
+# http://www.boldandbusted.com/
+
+# PURPOSE: This script automatically sets the proper /etc/resolv.conf entries
+# as pulled down from an OpenVPN server.
+
+# INSTALL NOTES:
+# Place this in /etc/openvpn/client.up
+# Then, add the following to your /etc/openvpn/<clientconfig>.conf:
+#   client
+#   up /etc/openvpn/client.up
+# Next, "chmod a+x /etc/openvpn/client.up"
+
+# USAGE NOTES:
+# Note that this script is best served with the companion "client.down"
+# script.
+
+# Tested under Debian lenny with OpenVPN 2.1_rc11
+# It should work with any UNIX with a POSIX sh, /etc/resolv.conf or resolvconf
+
+# This runs with the context of the OpenVPN UID/GID 
+# at the time of execution. This generally means that
+# the client "up" script will run fine, but the "down" script
+# will require the use of the OpenVPN "down-root" plugin
+# which is in the plugins/ directory of the OpenVPN source tree
+
+# A horrid work around, from a security perspective,
+# is to run OpenVPN as root. THIS IS NOT RECOMMENDED. You have
+# been WARNED.
+PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin
+
+# init variables
+
+i=1
+domains=
+fopt=
+ndoms=0
+nns=0
+nl='
+'
+
+# $foreign_option_<n> is something like
+# "dhcp-option DOMAIN example.com" (multiple allowed)
+# or
+# "dhcp-option DNS 10.10.10.10" (multiple allowed)
+
+# each DNS option becomes a "nameserver" option in resolv.con
+# if we get one DOMAIN, that becomes "domain" in resolv.conf
+# if we get multiple DOMAINS, those become "search" lines in resolv.conf
+
+while true; do
+  eval fopt=\$foreign_option_${i}
+  [ -z "${fopt}" ] && break
+
+  case ${fopt} in
+		dhcp-option\ DOMAIN\ *)
+           ndoms=$((ndoms + 1))
+           domains="${domains} ${fopt#dhcp-option DOMAIN }"
+           ;;
+		dhcp-option\ DNS\ *)
+           nns=$((nns + 1))
+           if [ $nns -le 3 ]; then
+             dns="${dns}${dns:+$nl}nameserver ${fopt#dhcp-option DNS }"
+           else
+             printf "%s\n" "Too many nameservers - ignoring after third" >&2
+           fi
+           ;;
+        *)
+           printf "%s\n" "Unknown option \"${fopt}\" - ignored" >&2
+           ;;
+	esac
+  i=$((i + 1))
+done
+
+ds=domain
+if [ $ndoms -gt 1 ]; then
+  ds=search
+fi
+
+# This is the complete file - "$domains" has a leading space already
+out="# resolv.conf autogenerated by ${0} (${1})${nl}${dns}${nl}${ds}${domains}"
+
+# use resolvconf if it's available
+if type resolvconf >/dev/null 2>&1; then
+  printf "%s\n" "${out}" | resolvconf -p -a "${1}"
+else
+  # Preserve the existing resolv.conf
+  if [ -e /etc/resolv.conf ] ; then
+    cp /etc/resolv.conf /etc/resolv.conf.ovpnsave
+  fi
+  printf "%s\n" "${out}" > /etc/resolv.conf
+  chmod 644 /etc/resolv.conf
+fi
+
+exit 0
-- 
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