9d96dfd468
Base LEDE/OpenWrt UCI for dnsmasq provides for DNS override in /etc/config/dhcp. It is desired to be able to use dnsmasq and Unbound as transparently as possible. Option 'add_extra_dns' will pull 'domain', 'mxhost', 'srvhost, and 'cname' from base. netifd/procd have an interaction with DHCPv6/RA on WAN (FS#713). Minor IP6 parameter updates can cause Unbound reload events every few minutes. List option 'trigger' selects which interfaces may cause reload. For example 'lan', 'wan' but not 'wan6'. Squash other cosmetics. Signed-off-by: Eric Luehrsen <ericluehrsen@hotmail.com>
99 lines
3.6 KiB
Bash
99 lines
3.6 KiB
Bash
#!/bin/sh
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##############################################################################
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# Copyright (C) 2016 Eric Luehrsen
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#
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##############################################################################
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#
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# This script facilitates alternate installation of Unbound+odhcpd and no
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# need for dnsmasq. There are some limitations, but it works and is small.
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# The lease file is parsed to make "zone-data:" and "local-data:" entries.
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#
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# config odhcpd 'odhcpd'
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# option leasetrigger '/usr/lib/unbound/odhcpd.sh'
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#
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##############################################################################
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# Common file location definitions
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. /usr/lib/unbound/unbound.sh
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##############################################################################
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odhcpd_settings() {
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# This trigger is out of normal init context, so we need to read some UCI.
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local cfg="$1"
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config_get UNBOUND_D_DHCP_LINK "$cfg" dhcp_link none
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config_get_bool UNBOUND_B_SLAAC6_MAC "$cfg" dhcp4_slaac6 0
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config_get UNBOUND_TXT_DOMAIN "$cfg" domain lan
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}
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##############################################################################
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odhcpd_zonedata() {
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local dns_ls_add=$UNBOUND_VARDIR/dhcp_dns.add
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local dns_ls_del=$UNBOUND_VARDIR/dhcp_dns.del
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local dhcp_ls_new=$UNBOUND_VARDIR/dhcp_lease.new
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local dhcp_ls_old=$UNBOUND_VARDIR/dhcp_lease.old
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local dhcp_ls_add=$UNBOUND_VARDIR/dhcp_lease.add
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local dhcp_ls_del=$UNBOUND_VARDIR/dhcp_lease.del
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local dhcp_origin=$( uci_get dhcp.@odhcpd[0].leasefile )
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config_load unbound
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config_foreach odhcpd_settings unbound
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if [ "$UNBOUND_D_DHCP_LINK" = "odhcpd" -a -f "$dhcp_origin" ] ; then
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# Capture the lease file which could be changing often
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cat $dhcp_origin | sort > $dhcp_ls_new
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touch $dhcp_ls_old
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sort $dhcp_ls_new $dhcp_ls_old $dhcp_ls_old | uniq -u > $dhcp_ls_add
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sort $dhcp_ls_old $dhcp_ls_new $dhcp_ls_new | uniq -u > $dhcp_ls_del
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# Go through the messy business of coding up A, AAAA, and PTR records
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# This static conf will be available if Unbound restarts asynchronously
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awk -v hostfile=$UNBOUND_DHCP_CONF -v domain=$UNBOUND_TXT_DOMAIN \
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-v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=1 \
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-f /usr/lib/unbound/odhcpd.awk $dhcp_ls_new
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# Deleting and adding all records into Unbound can be a burden in a
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# high density environment. Use unbound-control incrementally.
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awk -v hostfile=$dns_ls_del -v domain=$UNBOUND_TXT_DOMAIN \
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-v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=0 \
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-f /usr/lib/unbound/odhcpd.awk $dhcp_ls_del
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awk -v hostfile=$dns_ls_add -v domain=$UNBOUND_TXT_DOMAIN \
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-v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 -v bconf=0 \
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-f /usr/lib/unbound/odhcpd.awk $dhcp_ls_add
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if [ -f "$dns_ls_del" ] ; then
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cat $dns_ls_del | $UNBOUND_CONTROL_CFG local_datas_remove
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fi
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if [ -f "$dns_ls_add" ] ; then
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cat $dns_ls_add | $UNBOUND_CONTROL_CFG local_datas
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fi
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# prepare next round
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mv $dhcp_ls_new $dhcp_ls_old
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rm -f $dns_ls_del $dns_ls_add $dhcp_ls_del $dhcp_ls_add
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fi
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}
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##############################################################################
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odhcpd_zonedata
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##############################################################################
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