Add OpenVPN support files
This commit is contained in:
Roy Marples
8
support/openvpn/README
Normal file
8
support/openvpn/README
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These handy scripts setup any dns information that OpenVPN may push.
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They also handle the interaction with OpenRC so that the OpenVPN service
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can become "inactive". This means that when it starts, it goes inactive and
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OpenRC continues on its merry way booting the system. When OpenVPN connects
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to an endpoint it then re-starts the OpenVPN service and starts up any
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services that depend on us. A similar thing happens when we shut down.
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Of course, this is all optional.
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49
support/openvpn/down.sh
Executable file
49
support/openvpn/down.sh
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#!/bin/sh
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# Copyright 2007 Roy Marples
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# All rights reserved
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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# If we have a service specific script, run this now
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[ -x "${SVCNAME}"-down.sh ] && "${SVCNAME}"-down.sh
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# Restore resolv.conf to how it was
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if type resolvconf >/dev/null 2>&1; then
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resolvconf -d "${dev}"
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elif [ -e /etc/resolv.conf-"${dev}".sv ]; then
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# Important that we copy instead of move incase resolv.conf is
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# a symlink and not an actual file
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cp -p /etc/resolv.conf-"${dev}".sv /etc/resolv.conf
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rm -f /etc/resolv.conf-"${dev}".sv
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fi
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# Re-enter the init script to stop any dependant services
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service=/etc/init.d/"${SVCNAME}"
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[ ! -x "${service}" ] && service=/usr/local/etc/init.d/"${SVCNAME}"
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if [ -x "${service}" ]; then
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if "${service}" --quiet status; then
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export IN_BACKGROUND=YES
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"${service}" --quiet stop
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fi
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fi
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exit 0
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99
support/openvpn/up.sh
Executable file
99
support/openvpn/up.sh
Executable file
@@ -0,0 +1,99 @@
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#!/bin/sh
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# Copyright 2007 Roy Marples
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# All rights reserved
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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# Setup our resolv.conf
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# Vitally important that we use the domain entry in resolv.conf so we
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# can setup the nameservers are for the domain ONLY in resolvconf if
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# we're using a decent dns cache/forwarder like dnsmasq and NOT nscd/libc.
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# nscd/libc users will get the VPN nameservers before their other ones
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# and will use the first one that responds - maybe the LAN ones?
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# non resolvconf users just the the VPN resolv.conf
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# FIXME:- if we have >1 domain, then we have to use search :/
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# We need to add a flag to resolvconf to say
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# "these nameservers should only be used for the listed search domains
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# if other global nameservers are present on other interfaces"
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# This however, will break compatibility with Debians resolvconf
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# A possible workaround would be to just list multiple domain lines
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# and try and let resolvconf handle it
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PATH=$PATH:/usr/local/sbin
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NS=
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DOMAIN=
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SEARCH=
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i=1
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while true; do
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eval opt=\$foreign_option_${i}
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[ -z "${opt}" ] && break
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if [ "${opt}" != "${opt#dhcp-option DOMAIN *}" ]; then
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if [ -z "${DOMAIN}" ]; then
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DOMAIN="${opt#dhcp-option DOMAIN *}"
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else
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SEARCH="${SEARCH:+ }${opt#dhcp-option DOMAIN *}"
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fi
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elif [ "${opt}" != "${opt#dhcp-option DNS *}" ]; then
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NS="${NS}nameserver ${opt#dhcp-option DNS *}\n"
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fi
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i=$((${i} + 1))
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done
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if [ -n "${NS}" ]; then
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DNS="# Generated by openvpn for interface ${dev}\n"
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if [ -n "${SEARCH}" ] ; then
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DNS="${DNS}search ${DOMAIN} ${SEARCH}\n"
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else
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DNS="${DNS}domain ${DOMAIN}\n"
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fi
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DNS="${DNS}${NS}"
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if type resolvconf >/dev/null 2>&1; then
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printf "${DNS}" | resolvconf -a "${dev}"
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else
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# Preserve the existing resolv.conf
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if [ -e /etc/resolv.conf ] ; then
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cp -p /etc/resolv.conf /etc/resolv.conf-"${dev}".sv
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fi
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(umask 022; printf "${DNS}" > /etc/resolv.conf)
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fi
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fi
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# Below section is OpenRC specific
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# Quick summary - our init scripts are re-entrant and set the SVCNAME env var
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# as we could have >1 openvpn service
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# If we have a service specific script, run this now
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[ -x "${SVCNAME}"-up.sh ] && "${SVCNAME}"-up.sh
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# Re-enter the init script to start any dependant services
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service=/etc/init.d/"${SVCNAME}"
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[ ! -x "${service}" ] && service=/usr/local/etc/init.d/"${SVCNAME}"
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if [ -x "${service}" ]; then
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if ! "${service}" --quiet status; then
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export IN_BACKGROUND=true
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"${service}" --quiet start
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fi
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fi
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exit 0
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