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- #!/bin/sh
- ##############################################################################
- #
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License version 2 as
- # published by the Free Software Foundation.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # Copyright (C) 2016 Eric Luehrsen
- #
- ##############################################################################
- #
- # This script facilitates alternate installation of Unbound+odhcpd and no
- # need for dnsmasq. There are some limitations, but it works and is small.
- # The lease file is parsed to make "zone-data:" and "local-data:" entries.
- #
- # config odhcpd 'odhcpd'
- # option leasetrigger '/usr/lib/unbound/odhcpd.sh'
- #
- ##############################################################################
-
- # Common file location definitions
- . /usr/lib/unbound/unbound.sh
-
- ##############################################################################
-
- odhcpd_settings() {
- # This trigger is out of normal init context, so we need to read some UCI.
- local cfg="$1"
- config_get UNBOUND_D_DHCP_LINK "$cfg" dhcp_link none
- config_get_bool UNBOUND_B_SLAAC6_MAC "$cfg" dhcp4_slaac6 0
- config_get UNBOUND_TXT_DOMAIN "$cfg" domain lan
- }
-
- ##############################################################################
-
- odhcpd_zonedata() {
- local dns_ls_add=$UNBOUND_VARDIR/dhcp_dns.add
- local dns_ls_del=$UNBOUND_VARDIR/dhcp_dns.del
- local dhcp_ls_new=$UNBOUND_VARDIR/dhcp_lease.new
- local dhcp_ls_old=$UNBOUND_VARDIR/dhcp_lease.old
- local dhcp_ls_add=$UNBOUND_VARDIR/dhcp_lease.add
- local dhcp_ls_del=$UNBOUND_VARDIR/dhcp_lease.del
- local dhcp_origin=$( uci get dhcp.@odhcpd[0].leasefile )
-
- config_load unbound
- config_foreach odhcpd_settings unbound
-
-
- if [ "$UNBOUND_D_DHCP_LINK" = "odhcpd" -a -f "$dhcp_origin" ] ; then
- # Capture the lease file which could be changing often
- cat $dhcp_origin | sort > $dhcp_ls_new
- touch $dhcp_ls_old
- sort $dhcp_ls_new $dhcp_ls_old $dhcp_ls_old | uniq -u > $dhcp_ls_add
- sort $dhcp_ls_old $dhcp_ls_new $dhcp_ls_new | uniq -u > $dhcp_ls_del
-
- # Go through the messy business of coding up A, AAAA, and PTR records
- # This static conf will be available if Unbound restarts asynchronously
- awk -v hostfile=$UNBOUND_DHCP_CONF -v domain=$UNBOUND_TXT_DOMAIN \
- -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=1 \
- -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_new
-
- # Deleting and adding all records into Unbound can be a burden in a
- # high density environment. Use unbound-control incrementally.
- awk -v hostfile=$dns_ls_del -v domain=$UNBOUND_TXT_DOMAIN \
- -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=0 \
- -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_del
-
- awk -v hostfile=$dns_ls_add -v domain=$UNBOUND_TXT_DOMAIN \
- -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=0 \
- -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_add
-
-
- if [ -f "$dns_ls_del" ] ; then
- cat $dns_ls_del | $UNBOUND_CONTROL_CFG local_datas_remove
- fi
-
-
- if [ -f "$dns_ls_add" ] ; then
- cat $dns_ls_add | $UNBOUND_CONTROL_CFG local_datas
- fi
-
-
- # prepare next round
- mv $dhcp_ls_new $dhcp_ls_old
- rm -f $dns_ls_del $dns_ls_add $dhcp_ls_del $dhcp_ls_add
- fi
- }
-
- ##############################################################################
-
- odhcpd_zonedata
-
- ##############################################################################
-
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