2 ##############################################################################
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License version 2 as
6 # published by the Free Software Foundation.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # Copyright (C) 2016 Eric Luehrsen
15 ##############################################################################
17 # This script facilitates alternate installation of Unbound+odhcpd and no
18 # need for dnsmasq. There are some limitations, but it works and is small.
19 # The lease file is parsed to make "zone-data:" and "local-data:" entries.
21 # config odhcpd 'odhcpd'
22 # option leasetrigger '/usr/lib/unbound/odhcpd.sh'
24 ##############################################################################
26 # Common file location definitions
27 . /usr/lib/unbound/unbound.sh
29 ##############################################################################
32 # This trigger is out of normal init context, so we need to read some UCI.
34 config_get UNBOUND_D_DHCP_LINK "$cfg" dhcp_link none
35 config_get_bool UNBOUND_B_SLAAC6_MAC "$cfg" dhcp4_slaac6 0
36 config_get UNBOUND_TXT_DOMAIN "$cfg" domain lan
39 ##############################################################################
42 local dns_ls_add=$UNBOUND_VARDIR/dhcp_dns.add
43 local dns_ls_del=$UNBOUND_VARDIR/dhcp_dns.del
44 local dhcp_ls_new=$UNBOUND_VARDIR/dhcp_lease.new
45 local dhcp_ls_old=$UNBOUND_VARDIR/dhcp_lease.old
46 local dhcp_ls_add=$UNBOUND_VARDIR/dhcp_lease.add
47 local dhcp_ls_del=$UNBOUND_VARDIR/dhcp_lease.del
48 local dhcp_origin=$( uci get dhcp.@odhcpd[0].leasefile )
51 config_foreach odhcpd_settings unbound
54 if [ "$UNBOUND_D_DHCP_LINK" = "odhcpd" -a -f "$dhcp_origin" ] ; then
55 # Capture the lease file which could be changing often
56 cat $dhcp_origin | sort > $dhcp_ls_new
58 sort $dhcp_ls_new $dhcp_ls_old $dhcp_ls_old | uniq -u > $dhcp_ls_add
59 sort $dhcp_ls_old $dhcp_ls_new $dhcp_ls_new | uniq -u > $dhcp_ls_del
61 # Go through the messy business of coding up A, AAAA, and PTR records
62 # This static conf will be available if Unbound restarts asynchronously
63 awk -v hostfile=$UNBOUND_DHCP_CONF -v domain=$UNBOUND_TXT_DOMAIN \
64 -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=1 \
65 -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_new
67 # Deleting and adding all records into Unbound can be a burden in a
68 # high density environment. Use unbound-control incrementally.
69 awk -v hostfile=$dns_ls_del -v domain=$UNBOUND_TXT_DOMAIN \
70 -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=0 \
71 -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_del
73 awk -v hostfile=$dns_ls_add -v domain=$UNBOUND_TXT_DOMAIN \
74 -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=0 \
75 -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_add
78 if [ -f "$dns_ls_del" ] ; then
79 cat $dns_ls_del | $UNBOUND_CONTROL_CFG local_datas_remove
83 if [ -f "$dns_ls_add" ] ; then
84 cat $dns_ls_add | $UNBOUND_CONTROL_CFG local_datas
89 mv $dhcp_ls_new $dhcp_ls_old
90 rm -f $dns_ls_del $dns_ls_add $dhcp_ls_del $dhcp_ls_add
94 ##############################################################################
98 ##############################################################################