diff options
Diffstat (limited to 'bitmask_android/openvpn/contrib/pull-resolv-conf/client.up')
-rw-r--r-- | bitmask_android/openvpn/contrib/pull-resolv-conf/client.up | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/bitmask_android/openvpn/contrib/pull-resolv-conf/client.up b/bitmask_android/openvpn/contrib/pull-resolv-conf/client.up new file mode 100644 index 00000000..b28d4d19 --- /dev/null +++ b/bitmask_android/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 |