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1249 lines
33 KiB
1249 lines
33 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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# Unbound is a full featured recursive server with many options. The UCI
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# provided tries to simplify and bundle options. This should make Unbound
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# easier to deploy. Even light duty routers may resolve recursively instead of
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# depending on a stub with the ISP. The UCI also attempts to replicate dnsmasq
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# features as used in base LEDE/OpenWrt. If there is a desire for more
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# detailed tuning, then manual conf file overrides are also made available.
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#
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##############################################################################
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UNBOUND_B_SLAAC6_MAC=0
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UNBOUND_B_DNSSEC=0
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UNBOUND_B_DNS64=0
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UNBOUND_B_EXT_STATS=0
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UNBOUND_B_GATE_NAME=0
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UNBOUND_B_HIDE_BIND=1
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UNBOUND_B_LOCL_BLCK=0
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UNBOUND_B_LOCL_SERV=1
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UNBOUND_B_MAN_CONF=0
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UNBOUND_B_NTP_BOOT=1
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UNBOUND_B_QUERY_MIN=0
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UNBOUND_B_QRY_MINST=0
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UNBOUND_D_CONTROL=0
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UNBOUND_D_DOMAIN_TYPE=static
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UNBOUND_D_DHCP_LINK=none
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UNBOUND_D_EXTRA_DNS=0
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UNBOUND_D_LAN_FQDN=0
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UNBOUND_D_PRIV_BLCK=1
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UNBOUND_D_PROTOCOL=mixed
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UNBOUND_D_RESOURCE=small
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UNBOUND_D_RECURSION=passive
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UNBOUND_D_WAN_FQDN=0
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UNBOUND_IP_DNS64="64:ff9b::/96"
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UNBOUND_N_EDNS_SIZE=1280
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UNBOUND_N_FWD_PORTS=""
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UNBOUND_N_RX_PORT=53
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UNBOUND_N_ROOT_AGE=9
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UNBOUND_TTL_MIN=120
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UNBOUND_TXT_DOMAIN=lan
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UNBOUND_TXT_FWD_ZONE=""
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UNBOUND_TXT_HOSTNAME=thisrouter
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UNBOUND_LIST_FORWARD=""
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UNBOUND_LIST_INSECURE=""
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UNBOUND_LIST_PRV_SUBNET=""
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##############################################################################
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# keep track of local-domain: assignments during inserted resource records
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UNBOUND_LIST_DOMAINS=""
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##############################################################################
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. /lib/functions.sh
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. /lib/functions/network.sh
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. /usr/lib/unbound/defaults.sh
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. /usr/lib/unbound/dnsmasq.sh
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. /usr/lib/unbound/iptools.sh
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. /usr/lib/unbound/rootzone.sh
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##############################################################################
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copy_dash_update() {
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# TODO: remove this function and use builtins when this issues is resovled.
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# Due to OpenWrt/LEDE divergence "cp -u" isn't yet universally available.
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local filetime keeptime
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if [ -f $UNBOUND_KEYFILE.keep ] ; then
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# root.key.keep is reused if newest
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filetime=$( date -r $UNBOUND_KEYFILE +%s )
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keeptime=$( date -r $UNBOUND_KEYFILE.keep +%s )
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if [ $keeptime -gt $filetime ] ; then
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cp $UNBOUND_KEYFILE.keep $UNBOUND_KEYFILE
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fi
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rm -f $UNBOUND_KEYFILE.keep
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fi
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}
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##############################################################################
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create_interface_dns() {
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local cfg="$1"
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local ipcommand logint ignore ifname ifdashname
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local name names address addresses
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local ulaprefix if_fqdn host_fqdn mode mode_ptr
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# Create local-data: references for this hosts interfaces (router).
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config_get logint "$cfg" interface
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config_get_bool ignore "$cfg" ignore 0
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network_get_device ifname "$cfg"
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ifdashname="${ifname//./-}"
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ipcommand="ip -o address show $ifname"
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addresses=$( $ipcommand | awk '/inet/{sub(/\/.*/,"",$4); print $4}' )
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ulaprefix=$( uci_get network.@globals[0].ula_prefix )
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host_fqdn="$UNBOUND_TXT_HOSTNAME.$UNBOUND_TXT_DOMAIN"
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if_fqdn="$ifdashname.$host_fqdn"
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if [ -z "${ulaprefix%%:/*}" ] ; then
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# Nonsense so this option isn't globbed below
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ulaprefix="fdno:such:addr::/48"
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fi
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if [ "$ignore" -gt 0 ] ; then
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mode="$UNBOUND_D_WAN_FQDN"
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else
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mode="$UNBOUND_D_LAN_FQDN"
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fi
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case "$mode" in
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3)
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mode_ptr="$host_fqdn"
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names="$host_fqdn $UNBOUND_TXT_HOSTNAME"
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;;
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4)
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if [ -z "$ifdashname" ] ; then
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# race conditions at init can rarely cause a blank device return
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# the record format is invalid and Unbound won't load the conf file
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mode_ptr="$host_fqdn"
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names="$host_fqdn $UNBOUND_TXT_HOSTNAME"
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else
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mode_ptr="$if_fqdn"
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names="$if_fqdn $host_fqdn $UNBOUND_TXT_HOSTNAME"
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fi
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;;
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*)
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mode_ptr="$UNBOUND_TXT_HOSTNAME"
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names="$UNBOUND_TXT_HOSTNAME"
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;;
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esac
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if [ "$mode" -gt 1 ] ; then
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{
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for address in $addresses ; do
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case $address in
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fe80:*|169.254.*)
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echo " # note link address $address"
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;;
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[1-9a-f]*:*[0-9a-f])
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# GA and ULA IP6 for HOST IN AAA records (ip command is robust)
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for name in $names ; do
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echo " local-data: \"$name. 120 IN AAAA $address\""
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done
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echo " local-data-ptr: \"$address 120 $mode_ptr\""
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;;
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[1-9]*.*[0-9])
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# Old fashioned HOST IN A records
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for name in $names ; do
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echo " local-data: \"$name. 120 IN A $address\""
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done
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echo " local-data-ptr: \"$address 120 $mode_ptr\""
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;;
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esac
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done
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echo
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} >> $UNBOUND_CONFFILE
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elif [ "$mode" -gt 0 ] ; then
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{
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for address in $addresses ; do
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case $address in
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fe80:*|169.254.*)
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echo " # note link address $address"
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;;
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"${ulaprefix%%:/*}"*)
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# Only this networks ULA and only hostname
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echo " local-data: \"$UNBOUND_TXT_HOSTNAME. 120 IN AAAA $address\""
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echo " local-data-ptr: \"$address 120 $UNBOUND_TXT_HOSTNAME\""
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;;
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[1-9]*.*[0-9])
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echo " local-data: \"$UNBOUND_TXT_HOSTNAME. 120 IN A $address\""
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echo " local-data-ptr: \"$address 120 $UNBOUND_TXT_HOSTNAME\""
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;;
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esac
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done
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echo
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} >> $UNBOUND_CONFFILE
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fi
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}
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##############################################################################
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create_local_zone() {
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local target="$1"
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local partial domain found
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if [ -n "$UNBOUND_LIST_DOMAINS" ] ; then
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for domain in $UNBOUND_LIST_DOMAINS ; do
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case $target in
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*"${domain}")
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found=1
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break
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;;
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[A-Za-z0-9]*.[A-Za-z0-9]*)
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found=0
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;;
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*) # no dots
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found=1
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break
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;;
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esac
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done
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else
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found=0
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fi
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if [ $found -eq 0 ] ; then
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# New Zone! Bundle local-zones: by first two name tiers "abcd.tld."
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partial=$( echo "$target" | awk -F. '{ j=NF ; i=j-1; print $i"."$j }' )
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UNBOUND_LIST_DOMAINS="$UNBOUND_LIST_DOMAINS $partial"
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echo " local-zone: $partial. transparent" >> $UNBOUND_CONFFILE
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fi
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}
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##############################################################################
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create_host_record() {
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local cfg="$1"
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local ip name
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# basefiles dhcp "domain" clause which means host A, AAAA, and PRT record
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config_get ip "$cfg" ip
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config_get name "$cfg" name
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if [ -n "$name" -a -n "$ip" ] ; then
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create_local_zone "$name"
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{
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case $ip in
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fe80:*|169.254.*)
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echo " # note link address $ip for host $name"
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;;
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[1-9a-f]*:*[0-9a-f])
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echo " local-data: \"$name. 120 IN AAAA $ip\""
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echo " local-data-ptr: \"$ip 120 $name\""
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;;
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[1-9]*.*[0-9])
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echo " local-data: \"$name. 120 IN A $ip\""
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echo " local-data-ptr: \"$ip 120 $name\""
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;;
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esac
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} >> $UNBOUND_CONFFILE
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fi
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}
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##############################################################################
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create_mx_record() {
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local cfg="$1"
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local domain relay pref
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# Insert a static MX record
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config_get domain "$cfg" domain
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config_get relay "$cfg" relay
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config_get pref "$cfg" pref 10
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if [ -n "$domain" -a -n "$relay" ] ; then
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create_local_zone "$domain"
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echo " local-data: \"$domain. 120 IN MX $pref $relay.\"" \
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>> $UNBOUND_CONFFILE
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fi
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}
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##############################################################################
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create_srv_record() {
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local cfg="$1"
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local srv target port class weight
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# Insert a static SRV record such as SIP server
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config_get srv "$cfg" srv
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config_get target "$cfg" target
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config_get port "$cfg" port
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config_get class "$cfg" class 10
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config_get weight "$cfg" weight 10
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if [ -n "$srv" -a -n "$target" -a -n "$port" ] ; then
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create_local_zone "$srv"
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echo " local-data: \"$srv. 120 IN SRV $class $weight $port $target.\"" \
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>> $UNBOUND_CONFFILE
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fi
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}
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##############################################################################
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create_cname_record() {
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local cfg="$1"
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local cname target
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# Insert static CNAME record
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config_get cname "$cfg" cname
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config_get target "$cfg" target
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if [ -n "$cname" -a -n "$target" ] ; then
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create_local_zone "$cname"
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echo " local-data: \"$cname. 120 IN CNAME $target.\"" >> $UNBOUND_CONFFILE
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fi
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}
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##############################################################################
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create_access_control() {
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local cfg="$1"
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local subnets subnets4 subnets6
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local validip4 validip6
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network_get_subnets subnets4 "$cfg"
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network_get_subnets6 subnets6 "$cfg"
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subnets="$subnets4 $subnets6"
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if [ -n "$subnets" ] ; then
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for subnet in $subnets ; do
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validip4=$( valid_subnet4 $subnet )
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validip6=$( valid_subnet6 $subnet )
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if [ "$validip4" = "ok" -o "$validip6" = "ok" ] ; then
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# For each "network" UCI add "access-control:" white list for queries
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echo " access-control: $subnet allow" >> $UNBOUND_CONFFILE
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fi
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done
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fi
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}
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##############################################################################
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bundle_domain_forward() {
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UNBOUND_LIST_FORWARD="$UNBOUND_LIST_FORWARD $1"
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}
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##############################################################################
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bundle_domain_insecure() {
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UNBOUND_LIST_INSECURE="$UNBOUND_LIST_INSECURE $1"
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}
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##############################################################################
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bundle_private_interface() {
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local ipcommand ifsubnet ifsubnets ifname
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network_get_device ifname $1
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if [ -n "$ifname" ] ; then
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ipcommand="ip -6 -o address show $ifname"
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ifsubnets=$( $ipcommand | awk '/inet6/{ print $4 }' )
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if [ -n "$ifsubnets" ] ; then
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for ifsubnet in $ifsubnets ; do
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case $ifsubnet in
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[1-9]*:*[0-9a-f])
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# Special GLA protection for local block; ULA protected as a catagory
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UNBOUND_LIST_PRV_SUBNET="$UNBOUND_LIST_PRV_SUBNET $ifsubnet" ;;
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esac
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done
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fi
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fi
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}
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##############################################################################
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unbound_mkdir() {
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local filestuff
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if [ "$UNBOUND_D_DHCP_LINK" = "odhcpd" ] ; then
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local dhcp_origin=$( uci_get dhcp.@odhcpd[0].leasefile )
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local dhcp_dir=$( dirname $dhcp_origin )
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if [ ! -d "$dhcp_dir" ] ; then
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# make sure odhcpd has a directory to write (not done itself, yet)
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mkdir -p "$dhcp_dir"
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fi
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fi
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if [ -f $UNBOUND_KEYFILE ] ; then
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filestuff=$( cat $UNBOUND_KEYFILE )
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case "$filestuff" in
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*"state=2 [ VALID ]"*)
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# Lets not lose RFC 5011 tracking if we don't have to
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cp -p $UNBOUND_KEYFILE $UNBOUND_KEYFILE.keep
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;;
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esac
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fi
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# Blind copy /etc/ to /var/lib/
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mkdir -p $UNBOUND_VARDIR
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rm -f $UNBOUND_VARDIR/dhcp_*
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touch $UNBOUND_CONFFILE
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touch $UNBOUND_SRV_CONF
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touch $UNBOUND_EXT_CONF
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cp -p /etc/unbound/* $UNBOUND_VARDIR/
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if [ ! -f $UNBOUND_HINTFILE ] ; then
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if [ -f /usr/share/dns/root.hints ] ; then
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# Debian-like package dns-root-data
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cp -p /usr/share/dns/root.hints $UNBOUND_HINTFILE
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elif [ ! -f "$UNBOUND_TIMEFILE" ] ; then
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logger -t unbound -s "iterator will use built-in root hints"
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fi
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fi
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if [ ! -f $UNBOUND_KEYFILE ] ; then
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if [ -f /usr/share/dns/root.key ] ; then
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# Debian-like package dns-root-data
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cp -p /usr/share/dns/root.key $UNBOUND_KEYFILE
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elif [ -x $UNBOUND_ANCHOR ] ; then
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$UNBOUND_ANCHOR -a $UNBOUND_KEYFILE
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elif [ ! -f "$UNBOUND_TIMEFILE" ] ; then
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logger -t unbound -s "validator will use built-in trust anchor"
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fi
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fi
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copy_dash_update
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# Ensure access and prepare to jail
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chown -R unbound:unbound $UNBOUND_VARDIR
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chmod 755 $UNBOUND_VARDIR
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chmod 644 $UNBOUND_VARDIR/*
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if [ -f $UNBOUND_CTLKEY_FILE -o -f $UNBOUND_CTLPEM_FILE \
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-o -f $UNBOUND_SRVKEY_FILE -o -f $UNBOUND_SRVPEM_FILE ] ; then
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# Keys (some) exist already; do not create new ones
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chmod 640 $UNBOUND_CTLKEY_FILE $UNBOUND_CTLPEM_FILE \
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$UNBOUND_SRVKEY_FILE $UNBOUND_SRVPEM_FILE
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elif [ -x /usr/sbin/unbound-control-setup ] ; then
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case "$UNBOUND_D_CONTROL" in
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[2-3])
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# unbound-control-setup for encrypt opt. 2 and 3, but not 4 "static"
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/usr/sbin/unbound-control-setup -d $UNBOUND_VARDIR
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chown -R unbound:unbound $UNBOUND_CTLKEY_FILE $UNBOUND_CTLPEM_FILE \
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$UNBOUND_SRVKEY_FILE $UNBOUND_SRVPEM_FILE
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chmod 640 $UNBOUND_CTLKEY_FILE $UNBOUND_CTLPEM_FILE \
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$UNBOUND_SRVKEY_FILE $UNBOUND_SRVPEM_FILE
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cp -p $UNBOUND_CTLKEY_FILE /etc/unbound/unbound_control.key
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cp -p $UNBOUND_CTLPEM_FILE /etc/unbound/unbound_control.pem
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cp -p $UNBOUND_SRVKEY_FILE /etc/unbound/unbound_server.key
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cp -p $UNBOUND_SRVPEM_FILE /etc/unbound/unbound_server.pem
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;;
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esac
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fi
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}
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##############################################################################
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unbound_control() {
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if [ "$UNBOUND_D_CONTROL" -gt 1 ] ; then
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if [ ! -f $UNBOUND_CTLKEY_FILE -o ! -f $UNBOUND_CTLPEM_FILE \
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-o ! -f $UNBOUND_SRVKEY_FILE -o ! -f $UNBOUND_SRVPEM_FILE ] ; then
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# Key files need to be present; if unbound-control-setup was found, then
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# they might have been made during unbound_makedir() above.
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UNBOUND_D_CONTROL=0
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fi
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fi
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|
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case "$UNBOUND_D_CONTROL" in
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1)
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{
|
|
# Local Host Only Unencrypted Remote Control
|
|
echo "remote-control:"
|
|
echo " control-enable: yes"
|
|
echo " control-use-cert: no"
|
|
echo " control-interface: 127.0.0.1"
|
|
echo " control-interface: ::1"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
2)
|
|
{
|
|
# Local Host Only Encrypted Remote Control
|
|
echo "remote-control:"
|
|
echo " control-enable: yes"
|
|
echo " control-use-cert: yes"
|
|
echo " control-interface: 127.0.0.1"
|
|
echo " control-interface: ::1"
|
|
echo " server-key-file: \"$UNBOUND_SRVKEY_FILE\""
|
|
echo " server-cert-file: \"$UNBOUND_SRVPEM_FILE\""
|
|
echo " control-key-file: \"$UNBOUND_CTLKEY_FILE\""
|
|
echo " control-cert-file: \"$UNBOUND_CTLPEM_FILE\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
[3-4])
|
|
{
|
|
# Network Encrypted Remote Control
|
|
# (3) may auto setup and (4) must have static key/pem files
|
|
# TODO: add UCI list for interfaces to bind
|
|
echo "remote-control:"
|
|
echo " control-enable: yes"
|
|
echo " control-use-cert: yes"
|
|
echo " control-interface: 0.0.0.0"
|
|
echo " control-interface: ::0"
|
|
echo " server-key-file: \"$UNBOUND_SRVKEY_FILE\""
|
|
echo " server-cert-file: \"$UNBOUND_SRVPEM_FILE\""
|
|
echo " control-key-file: \"$UNBOUND_CTLKEY_FILE\""
|
|
echo " control-cert-file: \"$UNBOUND_CTLPEM_FILE\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
esac
|
|
|
|
|
|
{
|
|
# Amend your own extended clauses here like forward zones or disable
|
|
# above (local, no encryption) and amend your own remote encrypted control
|
|
echo
|
|
echo "include: $UNBOUND_EXT_CONF" >> $UNBOUND_CONFFILE
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_forward() {
|
|
local fdomain fresolver resolvers
|
|
# Forward selected domains to the upstream (WAN) stub resolver. This may be
|
|
# faster or local pool addresses to ISP service login page. This may keep
|
|
# internal organization lookups, well, internal to the organization.
|
|
|
|
|
|
if [ -n "$UNBOUND_LIST_FORWARD" ] ; then
|
|
resolvers=$( grep nameserver /tmp/resolv.conf.auto | sed "s/nameserver//g" )
|
|
|
|
|
|
if [ -n "$resolvers" ] ; then
|
|
for fdomain in $UNBOUND_LIST_FORWARD ; do
|
|
{
|
|
echo "forward-zone:"
|
|
echo " name: \"$fdomain.\""
|
|
for fresolver in $resolvers ; do
|
|
echo " forward-addr: $fresolver"
|
|
done
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
done
|
|
fi
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_conf() {
|
|
local rt_mem rt_conn modulestring domain ifsubnet
|
|
|
|
# Make fresh conf file
|
|
echo > $UNBOUND_CONFFILE
|
|
|
|
|
|
{
|
|
# Make fresh conf file
|
|
echo "# $UNBOUND_CONFFILE generated by UCI $( date )"
|
|
echo
|
|
# No threading
|
|
echo "server:"
|
|
echo " username: unbound"
|
|
echo " num-threads: 1"
|
|
echo " msg-cache-slabs: 1"
|
|
echo " rrset-cache-slabs: 1"
|
|
echo " infra-cache-slabs: 1"
|
|
echo " key-cache-slabs: 1"
|
|
echo
|
|
# Interface Wildcard (access contol handled by "option local_service")
|
|
echo " interface: 0.0.0.0"
|
|
echo " interface: ::0"
|
|
echo " outgoing-interface: 0.0.0.0"
|
|
echo " outgoing-interface: ::0"
|
|
echo
|
|
# Logging
|
|
echo " verbosity: 1"
|
|
echo " statistics-interval: 0"
|
|
echo " statistics-cumulative: no"
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ "$UNBOUND_B_EXT_STATS" -gt 0 ] ; then
|
|
{
|
|
# Log More
|
|
echo " extended-statistics: yes"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
{
|
|
# Log Less
|
|
echo " extended-statistics: no"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
case "$UNBOUND_D_PROTOCOL" in
|
|
ip4_only)
|
|
{
|
|
echo " do-ip4: yes"
|
|
echo " do-ip6: no"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
ip6_only)
|
|
{
|
|
echo " do-ip4: no"
|
|
echo " do-ip6: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
ip6_prefer)
|
|
{
|
|
echo " do-ip4: yes"
|
|
echo " do-ip6: yes"
|
|
echo " prefer-ip6: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
*)
|
|
{
|
|
echo " do-ip4: yes"
|
|
echo " do-ip6: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
esac
|
|
|
|
|
|
{
|
|
# protocol level tuning
|
|
echo " edns-buffer-size: $UNBOUND_N_EDNS_SIZE"
|
|
echo " msg-buffer-size: 8192"
|
|
echo " port: $UNBOUND_N_RX_PORT"
|
|
echo " outgoing-port-permit: 10240-65535"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
{
|
|
# Other harding and options for an embedded router
|
|
echo " harden-short-bufsize: yes"
|
|
echo " harden-large-queries: yes"
|
|
echo " harden-glue: yes"
|
|
echo " harden-below-nxdomain: no"
|
|
echo " harden-referral-path: no"
|
|
echo " use-caps-for-id: no"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
{
|
|
# Default Files
|
|
echo " use-syslog: yes"
|
|
echo " chroot: \"$UNBOUND_VARDIR\""
|
|
echo " directory: \"$UNBOUND_VARDIR\""
|
|
echo " pidfile: \"$UNBOUND_PIDFILE\""
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ -f "$UNBOUND_HINTFILE" ] ; then
|
|
# Optional hints if found
|
|
echo " root-hints: \"$UNBOUND_HINTFILE\"" >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_DNSSEC" -gt 0 -a -f "$UNBOUND_KEYFILE" ] ; then
|
|
{
|
|
echo " auto-trust-anchor-file: \"$UNBOUND_KEYFILE\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
echo >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
case "$UNBOUND_D_RESOURCE" in
|
|
# Tiny - Unbound's recommended cheap hardware config
|
|
tiny) rt_mem=1 ; rt_conn=1 ;;
|
|
# Small - Half RRCACHE and open ports
|
|
small) rt_mem=8 ; rt_conn=5 ;;
|
|
# Medium - Nearly default but with some added balancintg
|
|
medium) rt_mem=16 ; rt_conn=10 ;;
|
|
# Large - Double medium
|
|
large) rt_mem=32 ; rt_conn=10 ;;
|
|
# Whatever unbound does
|
|
*) rt_mem=0 ; rt_conn=0 ;;
|
|
esac
|
|
|
|
|
|
if [ "$rt_mem" -gt 0 ] ; then
|
|
{
|
|
# Set memory sizing parameters
|
|
echo " outgoing-range: $(($rt_conn*64))"
|
|
echo " num-queries-per-thread: $(($rt_conn*32))"
|
|
echo " outgoing-num-tcp: $(($rt_conn))"
|
|
echo " incoming-num-tcp: $(($rt_conn))"
|
|
echo " rrset-cache-size: $(($rt_mem*256))k"
|
|
echo " msg-cache-size: $(($rt_mem*128))k"
|
|
echo " key-cache-size: $(($rt_mem*128))k"
|
|
echo " neg-cache-size: $(($rt_mem*64))k"
|
|
echo " infra-cache-numhosts: $(($rt_mem*256))"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
elif [ ! -f "$UNBOUND_TIMEFILE" ] ; then
|
|
logger -t unbound -s "default memory resource consumption"
|
|
fi
|
|
|
|
# Assembly of module-config: options is tricky; order matters
|
|
modulestring="iterator"
|
|
|
|
|
|
if [ "$UNBOUND_B_DNSSEC" -gt 0 ] ; then
|
|
if [ ! -f "$UNBOUND_TIMEFILE" -a "$UNBOUND_B_NTP_BOOT" -gt 0 ] ; then
|
|
# DNSSEC chicken and egg with getting NTP time
|
|
echo " val-override-date: -1" >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
{
|
|
echo " harden-dnssec-stripped: yes"
|
|
echo " val-clean-additional: yes"
|
|
echo " ignore-cd-flag: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
modulestring="validator $modulestring"
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_DNS64" -gt 0 ] ; then
|
|
echo " dns64-prefix: $UNBOUND_IP_DNS64" >> $UNBOUND_CONFFILE
|
|
|
|
modulestring="dns64 $modulestring"
|
|
fi
|
|
|
|
|
|
{
|
|
# Print final module string
|
|
echo " module-config: \"$modulestring\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ "$UNBOUND_B_QRY_MINST" -gt 0 -a "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
|
|
{
|
|
# Some query privacy but "strict" will break some name servers
|
|
echo " qname-minimisation: yes"
|
|
echo " qname-minimisation-strict: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
elif [ "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
|
|
# Minor improvement on query privacy
|
|
echo " qname-minimisation: yes" >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
echo " qname-minimisation: no" >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
case "$UNBOUND_D_RECURSION" in
|
|
passive)
|
|
{
|
|
echo " prefetch: no"
|
|
echo " prefetch-key: no"
|
|
echo " target-fetch-policy: \"0 0 0 0 0\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
aggressive)
|
|
{
|
|
echo " prefetch: yes"
|
|
echo " prefetch-key: yes"
|
|
echo " target-fetch-policy: \"3 2 1 0 0\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
*)
|
|
if [ ! -f "$UNBOUND_TIMEFILE" ] ; then
|
|
logger -t unbound -s "default recursion configuration"
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
|
|
{
|
|
# Reload records more than 10 hours old
|
|
# DNSSEC 5 minute bogus cool down before retry
|
|
# Adaptive infrastructure info kept for 15 minutes
|
|
echo " cache-min-ttl: $UNBOUND_TTL_MIN"
|
|
echo " cache-max-ttl: 36000"
|
|
echo " val-bogus-ttl: 300"
|
|
echo " infra-host-ttl: 900"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ "$UNBOUND_B_HIDE_BIND" -gt 0 ] ; then
|
|
{
|
|
# Block server id and version DNS TXT records
|
|
echo " hide-identity: yes"
|
|
echo " hide-version: yes"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_D_PRIV_BLCK" -gt 0 ] ; then
|
|
{
|
|
# Remove _upstream_ or global reponses with private addresses.
|
|
# Unbounds own "local zone" and "forward zone" may still use these.
|
|
# RFC1918, RFC3927, RFC4291, RFC6598, RFC6890
|
|
echo " private-address: 10.0.0.0/8"
|
|
echo " private-address: 100.64.0.0/10"
|
|
echo " private-address: 169.254.0.0/16"
|
|
echo " private-address: 172.16.0.0/12"
|
|
echo " private-address: 192.168.0.0/16"
|
|
echo " private-address: fc00::/7"
|
|
echo " private-address: fe80::/10"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ -n "$UNBOUND_LIST_PRV_SUBNET" -a "$UNBOUND_D_PRIV_BLCK" -gt 1 ] ; then
|
|
for ifsubnet in $UNBOUND_LIST_PRV_SUBNET ; do
|
|
# Remove global DNS responses with your local network IP6 GLA
|
|
echo " private-address: $ifsubnet" >> $UNBOUND_CONFFILE
|
|
done
|
|
|
|
|
|
echo >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_LOCL_BLCK" -gt 0 ] ; then
|
|
{
|
|
# Remove DNS reponses from upstream with loopback IP
|
|
# Black hole DNS method for ad blocking, so consider...
|
|
echo " private-address: 127.0.0.0/8"
|
|
echo " private-address: ::1/128"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ -n "$UNBOUND_LIST_INSECURE" ] ; then
|
|
for domain in $UNBOUND_LIST_INSECURE ; do
|
|
# Except and accept domains without (DNSSEC); work around broken domains
|
|
echo " domain-insecure: \"$domain\"" >> $UNBOUND_CONFFILE
|
|
done
|
|
|
|
|
|
echo >> $UNBOUND_CONFFILE
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_access() {
|
|
# TODO: Unbound 1.6.0 added "tags" and "views", so we can add tags to
|
|
# each access-control IP block, and then divert access.
|
|
# -- "guest" WIFI will not be allowed to see local zone data
|
|
# -- "child" LAN can black whole a list of domains to http~deadpixel
|
|
|
|
|
|
if [ "$UNBOUND_B_LOCL_SERV" -gt 0 ] ; then
|
|
# Only respond to queries from which this device has an interface.
|
|
# Prevent DNS amplification attacks by not responding to the universe.
|
|
config_load network
|
|
config_foreach create_access_control interface
|
|
|
|
|
|
{
|
|
echo " access-control: 127.0.0.0/8 allow"
|
|
echo " access-control: ::1/128 allow"
|
|
echo " access-control: fe80::/10 allow"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
{
|
|
echo " access-control: 0.0.0.0/0 allow"
|
|
echo " access-control: ::0/0 allow"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
{
|
|
# Amend your own "server:" stuff here
|
|
echo " include: $UNBOUND_SRV_CONF"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_adblock() {
|
|
# TODO: Unbound 1.6.0 added "tags" and "views"; lets work with adblock team
|
|
local adb_enabled adb_file
|
|
|
|
if [ ! -x /usr/bin/adblock.sh -o ! -x /etc/init.d/adblock ] ; then
|
|
adb_enabled=0
|
|
else
|
|
/etc/init.d/adblock enabled && adb_enabled=1 || adb_enabled=0
|
|
fi
|
|
|
|
|
|
if [ "$adb_enabled" -gt 0 ] ; then
|
|
{
|
|
# Pull in your selected openwrt/pacakges/net/adblock generated lists
|
|
for adb_file in $UNBOUND_VARDIR/adb_list.* ; do
|
|
echo " include: $adb_file"
|
|
done
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_hostname() {
|
|
if [ -n "$UNBOUND_TXT_DOMAIN" ] ; then
|
|
{
|
|
# TODO: Unbound 1.6.0 added "tags" and "views" and we could make
|
|
# domains by interface to prevent DNS from "guest" to "home"
|
|
echo " local-zone: $UNBOUND_TXT_DOMAIN. $UNBOUND_D_DOMAIN_TYPE"
|
|
echo " domain-insecure: $UNBOUND_TXT_DOMAIN"
|
|
echo " private-domain: $UNBOUND_TXT_DOMAIN"
|
|
echo
|
|
echo " local-zone: $UNBOUND_TXT_HOSTNAME. $UNBOUND_D_DOMAIN_TYPE"
|
|
echo " domain-insecure: $UNBOUND_TXT_HOSTNAME"
|
|
echo " private-domain: $UNBOUND_TXT_HOSTNAME"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
case "$UNBOUND_D_DOMAIN_TYPE" in
|
|
deny|inform_deny|refuse|static)
|
|
{
|
|
# avoid upstream involvement in RFC6762 like responses (link only)
|
|
echo " local-zone: local. $UNBOUND_D_DOMAIN_TYPE"
|
|
echo " domain-insecure: local"
|
|
echo " private-domain: local"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
esac
|
|
|
|
|
|
if [ "$UNBOUND_D_LAN_FQDN" -gt 0 -o "$UNBOUND_D_WAN_FQDN" -gt 0 ] ; then
|
|
config_load dhcp
|
|
config_foreach create_interface_dns dhcp
|
|
fi
|
|
|
|
|
|
if [ -f "$UNBOUND_DHCP_CONF" ] ; then
|
|
{
|
|
# Seed DHCP records because dhcp scripts trigger externally
|
|
# Incremental Unbound restarts may drop unbound-control add records
|
|
echo " include: $UNBOUND_DHCP_CONF"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_records() {
|
|
if [ "$UNBOUND_D_EXTRA_DNS" -gt 0 ] ; then
|
|
# Parasite from the uci.dhcp.domain clauses
|
|
config_load dhcp
|
|
config_foreach create_host_record domain
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_D_EXTRA_DNS" -gt 1 ] ; then
|
|
config_foreach create_srv_record srvhost
|
|
config_foreach create_mx_record mxhost
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_D_EXTRA_DNS" -gt 2 ] ; then
|
|
config_foreach create_cname_record cname
|
|
fi
|
|
|
|
|
|
echo >> $UNBOUND_CONFFILE
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_uci() {
|
|
local cfg="$1"
|
|
local dnsmasqpath hostnm
|
|
|
|
hostnm=$( uci_get system.@system[0].hostname | awk '{print tolower($0)}' )
|
|
UNBOUND_TXT_HOSTNAME=${hostnm:-thisrouter}
|
|
|
|
config_get_bool UNBOUND_B_SLAAC6_MAC "$cfg" dhcp4_slaac6 0
|
|
config_get_bool UNBOUND_B_DNS64 "$cfg" dns64 0
|
|
config_get_bool UNBOUND_B_EXT_STATS "$cfg" extended_stats 0
|
|
config_get_bool UNBOUND_B_HIDE_BIND "$cfg" hide_binddata 1
|
|
config_get_bool UNBOUND_B_LOCL_SERV "$cfg" localservice 1
|
|
config_get_bool UNBOUND_B_MAN_CONF "$cfg" manual_conf 0
|
|
config_get_bool UNBOUND_B_QUERY_MIN "$cfg" query_minimize 0
|
|
config_get_bool UNBOUND_B_QRY_MINST "$cfg" query_min_strict 0
|
|
config_get_bool UNBOUND_B_LOCL_BLCK "$cfg" rebind_localhost 0
|
|
config_get_bool UNBOUND_B_DNSSEC "$cfg" validator 0
|
|
config_get_bool UNBOUND_B_NTP_BOOT "$cfg" validator_ntp 1
|
|
|
|
config_get UNBOUND_IP_DNS64 "$cfg" dns64_prefix "64:ff9b::/96"
|
|
|
|
config_get UNBOUND_N_EDNS_SIZE "$cfg" edns_size 1280
|
|
config_get UNBOUND_N_RX_PORT "$cfg" listen_port 53
|
|
config_get UNBOUND_N_ROOT_AGE "$cfg" root_age 9
|
|
|
|
config_get UNBOUND_D_CONTROL "$cfg" unbound_control 0
|
|
config_get UNBOUND_D_DOMAIN_TYPE "$cfg" domain_type static
|
|
config_get UNBOUND_D_DHCP_LINK "$cfg" dhcp_link none
|
|
config_get UNBOUND_D_EXTRA_DNS "$cfg" add_extra_dns 0
|
|
config_get UNBOUND_D_LAN_FQDN "$cfg" add_local_fqdn 0
|
|
config_get UNBOUND_D_PRIV_BLCK "$cfg" rebind_protection 1
|
|
config_get UNBOUND_D_PROTOCOL "$cfg" protocol mixed
|
|
config_get UNBOUND_D_RECURSION "$cfg" recursion passive
|
|
config_get UNBOUND_D_RESOURCE "$cfg" resource small
|
|
config_get UNBOUND_D_WAN_FQDN "$cfg" add_wan_fqdn 0
|
|
|
|
config_get UNBOUND_TTL_MIN "$cfg" ttl_min 120
|
|
config_get UNBOUND_TXT_DOMAIN "$cfg" domain lan
|
|
|
|
config_list_foreach "$cfg" "domain_forward" bundle_domain_forward
|
|
config_list_foreach "$cfg" "domain_insecure" bundle_domain_insecure
|
|
config_list_foreach "$cfg" "rebind_interface" bundle_private_interface
|
|
|
|
UNBOUND_LIST_DOMAINS="nowhere $UNBOUND_TXT_DOMAIN"
|
|
|
|
if [ "$UNBOUND_D_DHCP_LINK" = "none" ] ; then
|
|
config_get_bool UNBOUND_B_DNSMASQ "$cfg" dnsmasq_link_dns 0
|
|
|
|
|
|
if [ "$UNBOUND_B_DNSMASQ" -gt 0 ] ; then
|
|
UNBOUND_D_DHCP_LINK=dnsmasq
|
|
|
|
|
|
if [ ! -f "$UNBOUND_TIMEFILE" ] ; then
|
|
logger -t unbound -s "Please use 'dhcp_link' selector instead"
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_D_DHCP_LINK" = "dnsmasq" ] ; then
|
|
if [ ! -x /usr/sbin/dnsmasq -o ! -x /etc/init.d/dnsmasq ] ; then
|
|
UNBOUND_D_DHCP_LINK=none
|
|
else
|
|
/etc/init.d/dnsmasq enabled || UNBOUND_D_DHCP_LINK=none
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_D_DHCP_LINK" = "none" -a ! -f "$UNBOUND_TIMEFILE" ] ; then
|
|
logger -t unbound -s "cannot forward to dnsmasq"
|
|
fi
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_D_DHCP_LINK" = "odhcpd" ] ; then
|
|
if [ ! -x /usr/sbin/odhcpd -o ! -x /etc/init.d/odhcpd ] ; then
|
|
UNBOUND_D_DHCP_LINK=none
|
|
else
|
|
/etc/init.d/odhcpd enabled || UNBOUND_D_DHCP_LINK=none
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_D_DHCP_LINK" = "none" -a ! -f "$UNBOUND_TIMEFILE" ] ; then
|
|
logger -t unbound -s "cannot receive records from odhcpd"
|
|
fi
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_N_EDNS_SIZE" -lt 512 \
|
|
-o 4096 -lt "$UNBOUND_N_EDNS_SIZE" ] ; then
|
|
logger -t unbound -s "edns_size exceeds range, using default"
|
|
UNBOUND_N_EDNS_SIZE=1280
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_N_RX_PORT" -ne 53 ] \
|
|
&& [ "$UNBOUND_N_RX_PORT" -lt 1024 -o 10240 -lt "$UNBOUND_N_RX_PORT" ] ; then
|
|
logger -t unbound -s "privileged port or in 5 digits, using default"
|
|
UNBOUND_N_RX_PORT=53
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_TTL_MIN" -gt 1800 ] ; then
|
|
logger -t unbound -s "ttl_min could have had awful side effects, using 300"
|
|
UNBOUND_TTL_MIN=300
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
_resolv_setup() {
|
|
if [ "$UNBOUND_N_RX_PORT" != "53" ] ; then
|
|
return
|
|
fi
|
|
|
|
if [ -x /etc/init.d/dnsmasq ] && /etc/init.d/dnsmasq enabled \
|
|
&& nslookup localhost 127.0.0.1#53 >/dev/null 2>&1 ; then
|
|
# unbound is configured for port 53, but dnsmasq is enabled and a resolver
|
|
# listens on localhost:53, lets assume dnsmasq manages the resolver file.
|
|
# TODO:
|
|
# really check if dnsmasq runs a local (main) resolver in stead of using
|
|
# nslookup that times out when no resolver listens on localhost:53.
|
|
return
|
|
fi
|
|
|
|
# unbound is designated to listen on 127.0.0.1#53,
|
|
# set resolver file to local.
|
|
rm -f /tmp/resolv.conf
|
|
|
|
{
|
|
echo "# /tmp/resolv.conf generated by Unbound UCI $( date )"
|
|
echo "nameserver 127.0.0.1"
|
|
echo "nameserver ::1"
|
|
echo "search $UNBOUND_TXT_DOMAIN."
|
|
} > /tmp/resolv.conf
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
_resolv_teardown() {
|
|
case $( cat /tmp/resolv.conf ) in
|
|
*"generated by Unbound UCI"*)
|
|
# our resolver file, reset to auto resolver file.
|
|
rm -f /tmp/resolv.conf
|
|
ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
|
|
;;
|
|
esac
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_start() {
|
|
config_load unbound
|
|
config_foreach unbound_uci unbound
|
|
|
|
|
|
unbound_mkdir
|
|
|
|
|
|
if [ "$UNBOUND_B_MAN_CONF" -eq 0 ] ; then
|
|
unbound_conf
|
|
unbound_access
|
|
unbound_adblock
|
|
|
|
|
|
if [ "$UNBOUND_D_DHCP_LINK" = "dnsmasq" ] ; then
|
|
dnsmasq_link
|
|
else
|
|
unbound_hostname
|
|
unbound_records
|
|
fi
|
|
|
|
|
|
unbound_forward
|
|
unbound_control
|
|
fi
|
|
|
|
|
|
_resolv_setup
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_stop() {
|
|
_resolv_teardown
|
|
|
|
|
|
rootzone_update
|
|
}
|
|
|
|
##############################################################################
|
|
|