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130 lines
3.6 KiB
130 lines
3.6 KiB
#!/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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