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658c27ea97
DNS flag day 2020, software should reflect the minimum EDNS 1232 bytes. Added iface_wan and iface_lan to control internal DNS assignemnts and to control what is local service ACL. Interface wild cards are not explicitly set so that they can be customized in extended conf. Signed-off-by: Eric Luehrsen <ericluehrsen@gmail.com>
131 lines
3.6 KiB
Bash
131 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 component will copy root.key back to /etc/unbound/ periodically, but
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# avoid ROM flash abuse (UCI option).
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#
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##############################################################################
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# while useful (sh)ellcheck is pedantic and noisy
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# shellcheck disable=1091,2002,2004,2034,2039,2086,2094,2140,2154,2155
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. /usr/lib/unbound/defaults.sh
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##############################################################################
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roothints_update() {
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# TODO: Might not be implemented. Unbound doesn't natively update hints.
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# Unbound philosophy is built in root hints are good for machine life.
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return 0
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}
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##############################################################################
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rootkey_update() {
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local basekey_date rootkey_date rootkey_age filestuff
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local dnssec=$( uci_get unbound.@unbound[0].validator )
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local dnssec_ntp=$( uci_get unbound.@unbound[0].validator_ntp )
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local dnssec_age=$( uci_get unbound.@unbound[0].root_age )
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# fix empty
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[ -z "$dnssec" ] && dnssec=0
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[ -z "$dnssec_ntp" ] && dnssec_ntp=1
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[ -z "$dnssec_age" ] && dnssec_age=9
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if [ $dnssec_age -gt 90 ] || [ $dnssec -lt 1 ] ; then
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# Feature disabled
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return 0
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elif [ "$dnssec_ntp" -gt 0 ] && [ ! -f "$UB_TIME_FILE" ] ; then
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# We don't have time yet
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return 0
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fi
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if [ -f /etc/unbound/root.key ] ; then
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basekey_date=$( date -r /etc/unbound/root.key +%s )
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else
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# No persistent storage key
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basekey_date=$( date -d 2000-01-01 +%s )
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fi
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if [ -f "$UB_RKEY_FILE" ] ; then
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# Unbound maintains it itself
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rootkey_date=$( date -r $UB_RKEY_FILE +%s )
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rootkey_age=$(( (rootkey_date - basekey_date) / 86440 ))
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elif [ -x "$UB_ANCHOR" ] ; then
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# No tmpfs key - use unbound-anchor
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rootkey_date=$( date -I +%s )
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rootkey_age=$(( (rootkey_date - basekey_date) / 86440 ))
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$UB_ANCHOR -a $UB_RKEY_FILE
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else
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# give up
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rootkey_age=0
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fi
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if [ $rootkey_age -gt $dnssec_age ] ; then
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filestuff=$( cat $UB_RKEY_FILE )
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case "$filestuff" in
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*NOERROR*)
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# Header comment for drill and dig
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logger -t unbound -s "root.key updated after $rootkey_age days"
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cp -p $UB_RKEY_FILE /etc/unbound/root.key
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;;
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*"state=2 [ VALID ]"*)
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# Comment inline to key for unbound-anchor
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logger -t unbound -s "root.key updated after $rootkey_age days"
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cp -p $UB_RKEY_FILE /etc/unbound/root.key
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;;
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*)
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logger -t unbound -s "root.key still $rootkey_age days old"
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;;
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esac
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fi
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}
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##############################################################################
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resolv_teardown() {
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case $( cat $UB_RESOLV_CONF ) in
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*"generated by Unbound UCI"*)
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# our resolver file, reset to auto resolver file.
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rm -f $UB_RESOLV_CONF
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ln -s $UB_RESOLV_AUTO $UB_RESOLV_CONF
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;;
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esac
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}
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##############################################################################
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unbound_stop() {
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resolv_teardown
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roothints_update
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rootkey_update
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}
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##############################################################################
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