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#!/bin/sh
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# openvpn learn-address script maintaining DNS entries of connected clients in
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# unbound config.
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DOMAIN="${1}"
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OP="${2}"
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IP="${3}"
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CN="${4}"
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9
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# Trim domain off to avoid duplication if the CN is an FQDN
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CN=${CN%%.${DOMAIN}}
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DIR="/var/unbound"
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PIDFILE="/var/run/unbound.pid"
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IPV4REGEX='^[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}$'
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if [ -n "${IP}" -a "$(/usr/bin/basename ${IP})" = "${IP}" ]; then
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if [ $(expr "${IP}" : ${IPV4REGEX}) -ne 0 ]; then
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ARECORD='A'
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PTRRECORD=$(/bin/echo ${IP} | /usr/bin/awk -F . '{print $4"."$3"."$2"."$1".in-addr.arpa."}')
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else
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ARECORD='AAAA'
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PTRRECORD=$(/bin/echo ${IP} | /usr/bin/awk -F: 'BEGIN {OFS=""; }{addCount = 9 - NF; for(i=1; i<=NF;i++){if(length($i) == 0){ for(j=1;j<=addCount;j++){$i = ($i "0000");} } else { $i = substr(("0000" $i), length($i)+5-4);}}; print}'| /usr/bin/rev | /usr/bin/sed -e "s/./&./g;s/.*/&ip6.arpa/")
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fi
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CONF="${DIR}/openvpn.client.${IP}.conf"
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case "${OP}" in
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add|update)
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TMPCONF=$(/usr/bin/mktemp "${CONF}.XXXXXX")
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TMPSRV=$(/usr/bin/mktemp "${CONF}.XXXXXX")
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if [ -f "${TMPCONF}" -a -f "${TMPSRV}" ]; then
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# Remove all configs which mention the FQDN
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/usr/bin/grep -l -null "^local-data: \"${CN}.${DOMAIN} ${ARECORD} " ${DIR}/openvpn.client.*.conf | /usr/bin/xargs -0 /bin/rm
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/bin/test -f "${CONF}" && /bin/rm "${CONF}"
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# Add new local-data entry.
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(
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echo "local-data-ptr: \"${IP} ${CN}.${DOMAIN}\"" &&
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echo "local-data: \"${CN}.${DOMAIN} ${ARECORD} ${IP}\"" &&
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echo "local-data: \"${CN} ${ARECORD} ${IP}\""
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) > "${TMPCONF}"
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# Check syntax, install configuration and restart unbound.
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(
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echo "server:" &&
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echo "chroot: ${DIR}" &&
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echo "directory: ${DIR}" &&
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echo "include: ${TMPCONF}"
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) > "${TMPSRV}"
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/bin/chmod 644 "${TMPCONF}" "${TMPSRV}"
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/usr/local/sbin/unbound-checkconf "${TMPSRV}" && /bin/mv "${TMPCONF}" "${CONF}"
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# do not restart unbound on connect, see https://redmine.pfsense.org/issues/11129
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/usr/bin/su -m unbound -c "/usr/local/sbin/unbound-control -c /var/unbound/unbound.conf local_data ${CN}.${DOMAIN} ${ARECORD} ${IP}"
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/usr/bin/su -m unbound -c "/usr/local/sbin/unbound-control -c /var/unbound/unbound.conf local_data ${CN} ${ARECORD} ${IP}"
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/usr/bin/su -m unbound -c "/usr/local/sbin/unbound-control -c /var/unbound/unbound.conf local_data ${PTRRECORD} PTR ${CN}.${DOMAIN}"
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fi
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/bin/test -f "${TMPCONF}" && /bin/rm "${TMPCONF}"
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/bin/test -f "${TMPSRV}" && /bin/rm "${TMPSRV}"
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;;
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delete)
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# CN is not set on delete
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if [ -f "${CONF}" ]; then
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CN=`/usr/bin/sed -nr "s/(local-data-ptr\:) "\""(.*) (.*).${DOMAIN}"\""/\3/p" ${CONF}` &&
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/usr/bin/su -m unbound -c "/usr/local/sbin/unbound-control -c /var/unbound/unbound.conf local_data_remove ${CN}.${DOMAIN}" &&
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/usr/bin/su -m unbound -c "/usr/local/sbin/unbound-control -c /var/unbound/unbound.conf local_data_remove ${CN}" &&
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/usr/bin/su -m unbound -c "/usr/local/sbin/unbound-control -c /var/unbound/unbound.conf local_data_remove ${PTRRECORD}"
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/bin/rm "${CONF}"
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fi
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;;
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esac
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fi
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80
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exit 0
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