initial commit

support/openvpn/Makefile

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+MK=	../../mk
+include ${MK}/os.mk
+
+DIR=	${DATADIR}/support/openvpn
+BIN=	down.sh up.sh
+INC=	README.md
+
+
+include ${MK}/scripts.mk

support/openvpn/README.md

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+These handy scripts setup any dns information that OpenVPN may push.
+They also handle the interaction with OpenRC so that the OpenVPN service
+can become "inactive". This means that when it starts, it goes inactive and
+OpenRC continues on its merry way booting the system. When OpenVPN connects
+to an endpoint it then re-starts the OpenVPN service and starts up any
+services that depend on us. A similar thing happens when we shut down.
+
+Of course, this is all optional.

support/openvpn/down.sh

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+#!/bin/sh
+# Copyright (c) 2007-2015 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+#    except according to the terms contained in the LICENSE file.
+
+# If we have a service specific script, run this now
+[ -x "${RC_SVCNAME}"-down.sh ] && "${RC_SVCNAME}"-down.sh
+
+# Restore resolv.conf to how it was
+if command -v resolvconf >/dev/null 2>&1; then
+	resolvconf -d "${dev}"
+elif [ -e /etc/resolv.conf-"${dev}".sv ]; then
+	# Important that we copy instead of move incase resolv.conf is
+	# a symlink and not an actual file
+	cp -p /etc/resolv.conf-"${dev}".sv /etc/resolv.conf
+	rm -f /etc/resolv.conf-"${dev}".sv
+fi
+
+# Re-enter the init script to stop any dependant services
+if [ -x "${RC_SERVICE}" ]; then
+	if "${RC_SERVICE}" --quiet status; then
+		IN_BACKGROUND=YES
+		export IN_BACKGROUND
+		"${RC_SERVICE}" --quiet stop
+	fi
+fi
+
+exit 0

support/openvpn/up.sh

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+#!/bin/sh
+# Copyright (c) 2007-2015 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+#    except according to the terms contained in the LICENSE file.
+
+# Setup our resolv.conf
+# Vitally important that we use the domain entry in resolv.conf so we
+# can setup the nameservers are for the domain ONLY in resolvconf if
+# we're using a decent dns cache/forwarder like dnsmasq and NOT nscd/libc.
+# nscd/libc users will get the VPN nameservers before their other ones
+# and will use the first one that responds - maybe the LAN ones?
+# non resolvconf users just the the VPN resolv.conf
+
+# FIXME:- if we have >1 domain, then we have to use search :/
+# We need to add a flag to resolvconf to say
+# "these nameservers should only be used for the listed search domains
+#  if other global nameservers are present on other interfaces"
+# This however, will break compatibility with Debians resolvconf
+# A possible workaround would be to just list multiple domain lines
+# and try and let resolvconf handle it
+
+NS=
+DOMAIN=
+SEARCH=
+i=1
+while true; do
+	eval opt=\$foreign_option_${i}
+	[ -z "${opt}" ] && break
+	if [ "${opt}" != "${opt#dhcp-option DOMAIN *}" ]; then
+		if [ -z "${DOMAIN}" ]; then
+			DOMAIN="${opt#dhcp-option DOMAIN *}"
+		else
+			SEARCH="${SEARCH:+ }${opt#dhcp-option DOMAIN *}"
+		fi
+	elif [ "${opt}" != "${opt#dhcp-option DNS *}" ]; then
+		NS="${NS}nameserver ${opt#dhcp-option DNS *}\n"
+	fi
+	: $(( i += 1 ))
+done
+
+if [ -n "${NS}" ]; then
+	DNS="# Generated by openvpn for interface ${dev}\n"
+	if [ -n "${SEARCH}" ]; then
+		DNS="${DNS}search ${DOMAIN} ${SEARCH}\n"
+	else
+		DNS="${DNS}domain ${DOMAIN}\n"
+	fi
+	DNS="${DNS}${NS}"
+	if command -v resolvconf >/dev/null 2>&1; then
+		printf "${DNS}" | resolvconf -a "${dev}"
+	else
+		# Preserve the existing resolv.conf
+		if [ -e /etc/resolv.conf ]; then
+			cp -p /etc/resolv.conf /etc/resolv.conf-"${dev}".sv
+		fi
+		(umask 022; printf "${DNS}" > /etc/resolv.conf)
+	fi
+fi
+
+# Below section is OpenRC specific
+
+# If we have a service specific script, run this now
+[ -x "${RC_SVCNAME}"-up.sh ] && "${RC_SVCNAME}"-up.sh
+
+# Re-enter the init script to start any dependant services
+if [ -x "${RC_SERVICE}" ]; then
+	if ! "${RC_SERVICE}" --quiet status; then
+		IN_BACKGROUND=YES
+		export IN_BACKGROUND
+		"${RC_SERVICE}" --quiet start
+	fi
+fi
+
+exit 0