|
|
- #!/bin/sh
- ##############################################################################
- #
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License version 2 as
- # published by the Free Software Foundation.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # Copyright (C) 2016 Eric Luehrsen
- #
- ##############################################################################
- #
- # Unbound is a full featured recursive server with many options. The UCI
- # provided tries to simplify and bundle options. This should make Unbound
- # easier to deploy. Even light duty routers may resolve recursively instead of
- # depending on a stub with the ISP. The UCI also attempts to replicate dnsmasq
- # features as used in base LEDE/OpenWrt. If there is a desire for more
- # detailed tuning, then manual conf file overrides are also made available.
- #
- ##############################################################################
-
- UNBOUND_B_SLAAC6_MAC=0
- UNBOUND_B_DNSSEC=0
- UNBOUND_B_DNS64=0
- UNBOUND_B_EXT_STATS=0
- UNBOUND_B_GATE_NAME=0
- UNBOUND_B_HIDE_BIND=1
- UNBOUND_B_LOCL_BLCK=0
- UNBOUND_B_LOCL_SERV=1
- UNBOUND_B_MAN_CONF=0
- UNBOUND_B_NTP_BOOT=1
- UNBOUND_B_QUERY_MIN=0
- UNBOUND_B_QRY_MINST=0
- UNBOUND_B_AUTH_ROOT=0
-
- UNBOUND_D_CONTROL=0
- UNBOUND_D_DOMAIN_TYPE=static
- UNBOUND_D_DHCP_LINK=none
- UNBOUND_D_EXTRA_DNS=0
- UNBOUND_D_LAN_FQDN=0
- UNBOUND_D_PRIV_BLCK=1
- UNBOUND_D_PROTOCOL=mixed
- UNBOUND_D_RESOURCE=small
- UNBOUND_D_RECURSION=passive
- UNBOUND_D_WAN_FQDN=0
-
- UNBOUND_IP_DNS64="64:ff9b::/96"
-
- UNBOUND_N_EDNS_SIZE=1280
- UNBOUND_N_FWD_PORTS=""
- UNBOUND_N_RX_PORT=53
- UNBOUND_N_ROOT_AGE=9
-
- UNBOUND_TTL_MIN=120
-
- UNBOUND_TXT_DOMAIN=lan
- UNBOUND_TXT_FWD_ZONE=""
- UNBOUND_TXT_HOSTNAME=thisrouter
-
- UNBOUND_LIST_FORWARD=""
- UNBOUND_LIST_INSECURE=""
-
- ##############################################################################
-
- # keep track of assignments during inserted resource records
- UNBOUND_LIST_DOMAINS=""
- UNBOUND_LIST_IFACE=""
- UNBOUND_LIST_PRV_IP6GLA=""
- UNBOUND_LIST_LAN_NET=""
-
- # Similar default SOA / NS RR as Unbound uses for private ARPA zones
- UNBOUND_XSOA="3600 IN SOA localhost. nobody.invalid. 1 3600 1200 7200 600"
- UNBOUND_XNS="3600 IN NS localhost."
-
- ##############################################################################
-
- . /lib/functions.sh
- . /lib/functions/network.sh
-
- . /usr/lib/unbound/defaults.sh
- . /usr/lib/unbound/dnsmasq.sh
- . /usr/lib/unbound/iptools.sh
- . /usr/lib/unbound/rootzone.sh
-
- ##############################################################################
-
- create_interface_dns() {
- local cfg="$1"
- local ipcommand logint ignore ifname ifdashname
- local name names address addresses
- local ulaprefix if_fqdn host_fqdn
- local mode_ptr="$UNBOUND_TXT_HOSTNAME"
- local names="$UNBOUND_TXT_HOSTNAME"
-
- # Create local-data: references for this hosts interfaces (router).
- config_get logint "$cfg" interface
- config_get_bool ignore "$cfg" ignore 0
- network_get_device ifname "$cfg"
-
- ifdashname="${ifname//./-}"
- ipcommand="ip -o address show $ifname"
- addresses=$( $ipcommand | awk '/inet/{sub(/\/.*/,"",$4); print $4}' )
- ulaprefix=$( uci_get network.@globals[0].ula_prefix )
- host_fqdn="$UNBOUND_TXT_HOSTNAME.$UNBOUND_TXT_DOMAIN"
- if_fqdn="$ifdashname.$host_fqdn"
-
-
- if [ -z "$ifdashname" ] ; then
- # race conditions at init can rarely cause a blank device return
- # the record format is invalid and Unbound won't load the conf file
- mode=0
-
- elif [ -n "$UNBOUND_LIST_IFACE" ] ; then
- case "$UNBOUND_LIST_IFACE" in
- *$ifdashname*)
- # repeat such as dual WAN (eth0-1) and WAN6 (eth0-1)
- mode=0
- ;;
-
- *)
- mode=1
- ;;
- esac
-
- else
- mode=1
- fi
-
-
- if [ $mode -gt 0 ] ; then
- UNBOUND_LIST_IFACE="$UNBOUND_LIST_IFACE $ifdashname"
-
-
- if [ -z "${ulaprefix%%:/*}" ] ; then
- # Nonsense so this option isn't globbed below
- ulaprefix="fdno:such:addr::/48"
- fi
-
-
- if [ "$ignore" -gt 0 ] ; then
- mode="$UNBOUND_D_WAN_FQDN"
- else
- mode="$UNBOUND_D_LAN_FQDN"
- fi
- fi
-
-
- if [ "$mode" -gt 1 ] ; then
- case "$mode" in
- 3)
- mode_ptr="$host_fqdn"
- names="$host_fqdn $UNBOUND_TXT_HOSTNAME"
- ;;
-
- 4)
- mode_ptr="$if_fqdn"
- names="$if_fqdn $host_fqdn $UNBOUND_TXT_HOSTNAME"
- ;;
- esac
-
-
- {
- for address in $addresses ; do
- case $address in
- fe80:*|169.254.*)
- echo " # note link address $address"
- ;;
-
- [1-9a-f]*:*[0-9a-f])
- # GA and ULA IP6 for HOST IN AAA records (ip command is robust)
- for name in $names ; do
- echo " local-data: \"$name. 120 IN AAAA $address\""
- done
- echo " local-data-ptr: \"$address 120 $mode_ptr\""
- ;;
-
- [1-9]*.*[0-9])
- # Old fashioned HOST IN A records
- for name in $names ; do
- echo " local-data: \"$name. 120 IN A $address\""
- done
- echo " local-data-ptr: \"$address 120 $mode_ptr\""
- ;;
- esac
- done
- echo
- } >> $UNBOUND_CONFFILE
-
- elif [ "$mode" -gt 0 ] ; then
- {
- for address in $addresses ; do
- case $address in
- fe80:*|169.254.*)
- echo " # note link address $address"
- ;;
-
- "${ulaprefix%%:/*}"*)
- # Only this networks ULA and only hostname
- echo " local-data: \"$UNBOUND_TXT_HOSTNAME. 120 IN AAAA $address\""
- echo " local-data-ptr: \"$address 120 $UNBOUND_TXT_HOSTNAME\""
- ;;
-
- [1-9]*.*[0-9])
- echo " local-data: \"$UNBOUND_TXT_HOSTNAME. 120 IN A $address\""
- echo " local-data-ptr: \"$address 120 $UNBOUND_TXT_HOSTNAME\""
- ;;
- esac
- done
- echo
- } >> $UNBOUND_CONFFILE
- fi
- }
-
- ##############################################################################
-
- create_local_zone() {
- local target="$1"
- local partial domain found
-
-
- if [ -n "$UNBOUND_LIST_DOMAINS" ] ; then
- for domain in $UNBOUND_LIST_DOMAINS ; do
- case $target in
- *"${domain}")
- found=1
- break
- ;;
-
- [A-Za-z0-9]*.[A-Za-z0-9]*)
- found=0
- ;;
-
- *) # no dots
- found=1
- break
- ;;
- esac
- done
- else
- found=0
- fi
-
-
- if [ $found -eq 0 ] ; then
- # New Zone! Bundle local-zones: by first two name tiers "abcd.tld."
- partial=$( echo "$target" | awk -F. '{ j=NF ; i=j-1; print $i"."$j }' )
- UNBOUND_LIST_DOMAINS="$UNBOUND_LIST_DOMAINS $partial"
- echo " local-zone: $partial transparent" >> $UNBOUND_CONFFILE
- fi
- }
-
- ##############################################################################
-
- create_host_record() {
- local cfg="$1"
- local ip name
-
- # basefiles dhcp "domain" clause which means host A, AAAA, and PRT record
- config_get ip "$cfg" ip
- config_get name "$cfg" name
-
-
- if [ -n "$name" -a -n "$ip" ] ; then
- create_local_zone "$name"
-
- {
- case $ip in
- fe80:*|169.254.*)
- echo " # note link address $ip for host $name"
- ;;
-
- [1-9a-f]*:*[0-9a-f])
- echo " local-data: \"$name. 120 IN AAAA $ip\""
- echo " local-data-ptr: \"$ip 120 $name\""
- ;;
-
- [1-9]*.*[0-9])
- echo " local-data: \"$name. 120 IN A $ip\""
- echo " local-data-ptr: \"$ip 120 $name\""
- ;;
- esac
- } >> $UNBOUND_CONFFILE
- fi
- }
-
- ##############################################################################
-
- create_mx_record() {
- local cfg="$1"
- local domain relay pref
-
- # Insert a static MX record
- config_get domain "$cfg" domain
- config_get relay "$cfg" relay
- config_get pref "$cfg" pref 10
-
-
- if [ -n "$domain" -a -n "$relay" ] ; then
- create_local_zone "$domain"
- echo " local-data: \"$domain. 120 IN MX $pref $relay.\"" \
- >> $UNBOUND_CONFFILE
- fi
- }
-
- ##############################################################################
-
- create_srv_record() {
- local cfg="$1"
- local srv target port class weight
-
- # Insert a static SRV record such as SIP server
- config_get srv "$cfg" srv
- config_get target "$cfg" target
- config_get port "$cfg" port
- config_get class "$cfg" class 10
- config_get weight "$cfg" weight 10
-
-
- if [ -n "$srv" -a -n "$target" -a -n "$port" ] ; then
- create_local_zone "$srv"
- echo " local-data: \"$srv. 120 IN SRV $class $weight $port $target.\"" \
- >> $UNBOUND_CONFFILE
- fi
- }
-
- ##############################################################################
-
- create_cname_record() {
- local cfg="$1"
- local cname target
-
- # Insert static CNAME record
- config_get cname "$cfg" cname
- config_get target "$cfg" target
-
-
- if [ -n "$cname" -a -n "$target" ] ; then
- create_local_zone "$cname"
- echo " local-data: \"$cname. 120 IN CNAME $target.\"" >> $UNBOUND_CONFFILE
- fi
- }
-
- ##############################################################################
-
- create_access_control() {
- local cfg="$1"
- local subnets subnets4 subnets6
- local validip4 validip6
-
- network_get_subnets subnets4 "$cfg"
- network_get_subnets6 subnets6 "$cfg"
- subnets="$subnets4 $subnets6"
-
-
- if [ -n "$subnets" ] ; then
- for subnet in $subnets ; do
- validip4=$( valid_subnet4 $subnet )
- validip6=$( valid_subnet6 $subnet )
-
-
- if [ "$validip4" = "ok" -o "$validip6" = "ok" ] ; then
- # For each "network" UCI add "access-control:" white list for queries
- echo " access-control: $subnet allow" >> $UNBOUND_CONFFILE
- fi
- done
- fi
- }
-
- ##############################################################################
-
- bundle_domain_forward() {
- UNBOUND_LIST_FORWARD="$UNBOUND_LIST_FORWARD $1"
- }
-
- ##############################################################################
-
- bundle_domain_insecure() {
- UNBOUND_LIST_INSECURE="$UNBOUND_LIST_INSECURE $1"
- }
-
- ##############################################################################
-
- bundle_private_interface() {
- local ipcommand ifsubnet ifsubnets ifname validip4
-
- network_get_device ifname $1
-
-
- if [ -n "$ifname" ] ; then
- ipcommand="ip -o address show $ifname"
- ifsubnets=$( $ipcommand | awk '/inet/{ print $4 }' )
-
-
- if [ -n "$ifsubnets" ] ; then
- for ifsubnet in $ifsubnets ; do
- case $ifsubnet in
- [1-9][0-9a-f][0-9a-f][0-9a-f]:*[0-9a-f])
- # Special GLA protection for local block; ULA protected as a catagory
- UNBOUND_LIST_PRV_IP6GLA="$UNBOUND_LIST_PRV_IP6GLA $ifsubnet"
- ;;
-
- f[dc][0-9a-f][0-9a-f]:*[0-9a-f])
- # Used to configure specific local-zone: data
- UNBOUND_LIST_LAN_NET="$UNBOUND_LIST_LAN_NET $ifsubnet"
- ;;
-
- *)
- validip4=$( valid_subnet4 $ifsubnet )
-
-
- if [ "$validip4" = "ok" ] ; then
- UNBOUND_LIST_LAN_NET="$UNBOUND_LIST_LAN_NET $ifsubnet"
- fi
- ;;
- esac
- done
- fi
- fi
- }
-
- ##############################################################################
-
- unbound_mkdir() {
- local filestuff
-
-
- if [ "$UNBOUND_D_DHCP_LINK" = "odhcpd" ] ; then
- local dhcp_origin=$( uci_get dhcp.@odhcpd[0].leasefile )
- local dhcp_dir=$( dirname $dhcp_origin )
-
-
- if [ ! -d "$dhcp_dir" ] ; then
- # make sure odhcpd has a directory to write (not done itself, yet)
- mkdir -p "$dhcp_dir"
- fi
- fi
-
-
- if [ -f $UNBOUND_KEYFILE ] ; then
- filestuff=$( cat $UNBOUND_KEYFILE )
-
-
- case "$filestuff" in
- *"state=2 [ VALID ]"*)
- # Lets not lose RFC 5011 tracking if we don't have to
- cp -p $UNBOUND_KEYFILE $UNBOUND_KEYFILE.keep
- ;;
- esac
- fi
-
-
- # Blind copy /etc/ to /var/lib/
- mkdir -p $UNBOUND_VARDIR
- rm -f $UNBOUND_VARDIR/dhcp_*
- touch $UNBOUND_CONFFILE
- touch $UNBOUND_SRV_CONF
- touch $UNBOUND_EXT_CONF
- cp -p /etc/unbound/* $UNBOUND_VARDIR/
-
-
- if [ ! -f $UNBOUND_HINTFILE ] ; then
- if [ -f /usr/share/dns/root.hints ] ; then
- # Debian-like package dns-root-data
- cp -p /usr/share/dns/root.hints $UNBOUND_HINTFILE
-
- elif [ ! -f "$UNBOUND_TIMEFILE" ] ; then
- logger -t unbound -s "default root hints (built in rootservers.net)"
- fi
- fi
-
-
- if [ ! -f $UNBOUND_KEYFILE ] ; then
- if [ -f /usr/share/dns/root.key ] ; then
- # Debian-like package dns-root-data
- cp -p /usr/share/dns/root.key $UNBOUND_KEYFILE
-
- elif [ -x $UNBOUND_ANCHOR ] ; then
- $UNBOUND_ANCHOR -a $UNBOUND_KEYFILE
-
- elif [ ! -f "$UNBOUND_TIMEFILE" ] ; then
- logger -t unbound -s "default trust anchor (built in root DS record)"
- fi
- fi
-
-
- if [ -f $UNBOUND_KEYFILE.keep ] ; then
- # root.key.keep is reused if newest
- cp -u $UNBOUND_KEYFILE.keep $UNBOUND_KEYFILE
- rm -f $UNBOUND_KEYFILE.keep
- fi
-
-
- # Ensure access and prepare to jail
- chown -R unbound:unbound $UNBOUND_VARDIR
- chmod 755 $UNBOUND_VARDIR
- chmod 644 $UNBOUND_VARDIR/*
-
-
- if [ -f $UNBOUND_CTLKEY_FILE -o -f $UNBOUND_CTLPEM_FILE \
- -o -f $UNBOUND_SRVKEY_FILE -o -f $UNBOUND_SRVPEM_FILE ] ; then
- # Keys (some) exist already; do not create new ones
- chmod 640 $UNBOUND_CTLKEY_FILE $UNBOUND_CTLPEM_FILE \
- $UNBOUND_SRVKEY_FILE $UNBOUND_SRVPEM_FILE
-
- elif [ -x /usr/sbin/unbound-control-setup ] ; then
- case "$UNBOUND_D_CONTROL" in
- [2-3])
- # unbound-control-setup for encrypt opt. 2 and 3, but not 4 "static"
- /usr/sbin/unbound-control-setup -d $UNBOUND_VARDIR
-
- chown -R unbound:unbound $UNBOUND_CTLKEY_FILE $UNBOUND_CTLPEM_FILE \
- $UNBOUND_SRVKEY_FILE $UNBOUND_SRVPEM_FILE
-
- chmod 640 $UNBOUND_CTLKEY_FILE $UNBOUND_CTLPEM_FILE \
- $UNBOUND_SRVKEY_FILE $UNBOUND_SRVPEM_FILE
-
- cp -p $UNBOUND_CTLKEY_FILE /etc/unbound/unbound_control.key
- cp -p $UNBOUND_CTLPEM_FILE /etc/unbound/unbound_control.pem
- cp -p $UNBOUND_SRVKEY_FILE /etc/unbound/unbound_server.key
- cp -p $UNBOUND_SRVPEM_FILE /etc/unbound/unbound_server.pem
- ;;
- esac
- fi
- }
-
- ##############################################################################
-
- unbound_control() {
- if [ "$UNBOUND_D_CONTROL" -gt 1 ] ; then
- if [ ! -f $UNBOUND_CTLKEY_FILE -o ! -f $UNBOUND_CTLPEM_FILE \
- -o ! -f $UNBOUND_SRVKEY_FILE -o ! -f $UNBOUND_SRVPEM_FILE ] ; then
- # Key files need to be present; if unbound-control-setup was found, then
- # they might have been made during unbound_makedir() above.
- UNBOUND_D_CONTROL=0
- fi
- fi
-
-
- case "$UNBOUND_D_CONTROL" in
- 1)
- {
- # 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
- } >> $UNBOUND_CONFFILE
- done
- fi
- fi
- }
-
- ##############################################################################
-
- unbound_auth_root() {
- local axfrservers="lax.xfr.dns.icann.org iad.xfr.dns.icann.org"
- local httpserver="http://www.internic.net/domain/"
- local authzones="root arpa in-addr.arpa ip6.arpa"
- local server zone realzone
- # Download or AXFR the root and arpa zones to reduce the work needed at
- # top level of recursion. If your users will hit many ccTLD or you have
- # tracking logs resolving many PTR, then this can speed things up.
- # Total size of text in TMPFS could be about 5MB.
-
-
- if [ "$UNBOUND_B_AUTH_ROOT" -gt 0 ] ; then
- for zone in $authzones ; do
- if [ "$zone" = "root" ] ; then
- realzone="."
- else
- realzone=$zone
- fi
-
-
- {
- echo "auth-zone:"
- echo " name: $realzone"
- for server in $axfrservers ; do
- echo " master: $server"
- done
- echo " url: $httpserver$zone.zone"
- echo " fallback-enabled: yes"
- echo " for-downstream: no"
- echo " for-upstream: yes"
- echo " zonefile: $zone.zone"
- echo
- } >> $UNBOUND_CONFFILE
- done
- 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
- echo "server:"
- echo " username: unbound"
- echo " chroot: $UNBOUND_VARDIR"
- echo " directory: $UNBOUND_VARDIR"
- echo " pidfile: $UNBOUND_PIDFILE"
- echo
- # No threading
- 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 " use-syslog: yes"
- 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
- ;;
-
- mixed)
- {
- echo " do-ip4: yes"
- echo " do-ip6: yes"
- } >> $UNBOUND_CONFFILE
- ;;
-
- *)
- if [ ! -f "$UNBOUND_TIMEFILE" ] ; then
- logger -t unbound -s "default protocol configuration"
- fi
- ;;
- 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
- } >> $UNBOUND_CONFFILE
-
-
- if [ -f "$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 configuration"
- 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
- } >> $UNBOUND_CONFFILE
-
-
- case "$UNBOUND_D_RECURSION" in
- passive)
- {
- # Some query privacy but "strict" will break some servers
- if [ "$UNBOUND_B_QRY_MINST" -gt 0 \
- -a "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
- echo " qname-minimisation: yes"
- echo " qname-minimisation-strict: yes"
- elif [ "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
- echo " qname-minimisation: yes"
- else
- echo " qname-minimisation: no"
- fi
- # Use DNSSEC to quickly understand NXDOMAIN ranges
- if [ "$UNBOUND_B_DNSSEC" -gt 0 ] ; then
- echo " aggressive-nsec: yes"
- echo " prefetch-key: no"
- fi
- # On demand fetching
- echo " prefetch: no"
- echo " target-fetch-policy: \"0 0 0 0 0\""
- echo
- } >> $UNBOUND_CONFFILE
- ;;
-
- aggressive)
- {
- # Some query privacy but "strict" will break some servers
- if [ "$UNBOUND_B_QRY_MINST" -gt 0 \
- -a "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
- echo " qname-minimisation: yes"
- echo " qname-minimisation-strict: yes"
- elif [ "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
- echo " qname-minimisation: yes"
- else
- echo " qname-minimisation: no"
- fi
- # Use DNSSEC to quickly understand NXDOMAIN ranges
- if [ "$UNBOUND_B_DNSSEC" -gt 0 ] ; then
- echo " aggressive-nsec: yes"
- echo " prefetch-key: yes"
- fi
- # Prefetch what can be
- echo " prefetch: 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_IP6GLA" -a "$UNBOUND_D_PRIV_BLCK" -gt 1 ] ; then
- for ifsubnet in $UNBOUND_LIST_PRV_IP6GLA ; 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
- } >> $UNBOUND_CONFFILE
- fi
- }
-
- ##############################################################################
-
- unbound_hostname() {
- local ifsubnet ifarpa
-
-
- if [ -n "$UNBOUND_TXT_DOMAIN" ] ; then
- {
- # Hostname as TLD works, but not transparent through recursion
- echo " domain-insecure: $UNBOUND_TXT_HOSTNAME"
- echo " private-domain: $UNBOUND_TXT_HOSTNAME"
- echo " local-zone: $UNBOUND_TXT_HOSTNAME static"
- echo " local-data: \"$UNBOUND_TXT_HOSTNAME. $UNBOUND_XSOA\""
- echo " local-data: \"$UNBOUND_TXT_HOSTNAME. $UNBOUND_XNS\""
- echo
- } >> $UNBOUND_CONFFILE
-
-
- case "$UNBOUND_D_DOMAIN_TYPE" in
- deny|inform_deny|refuse|static)
- if [ -n "$UNBOUND_LIST_PRV_IP6GLA" \
- -a "$UNBOUND_D_PRIV_BLCK" -gt 1 ] ; then
- for ifsubnet in $UNBOUND_LIST_PRV_IP6GLA ; do
- ifarpa=$( domain_ptr_any "$ifsubnet" )
-
-
- if [ -n "$ifarpa" ] ; then
- {
- # Do NOT forward queries with your GLA ip6.arpa
- echo " domain-insecure: $ifarpa"
- echo " local-zone: $ifarpa $UNBOUND_D_DOMAIN_TYPE"
- echo " local-data: \"$ifarpa. $UNBOUND_XSOA\""
- echo " local-data: \"$ifarpa. $UNBOUND_XNS\""
- echo
- } >> $UNBOUND_CONFFILE
- fi
- done
- fi
-
-
- if [ -n "$UNBOUND_LIST_LAN_NET" \
- -a "$UNBOUND_D_PRIV_BLCK" -gt 0 ] ; then
- for ifsubnet in $UNBOUND_LIST_LAN_NET ; do
- ifarpa=$( domain_ptr_any "$ifsubnet" )
-
-
- if [ -n "$ifarpa" ] ; then
- {
- # Do NOT forward queries with your ULA ip6.arpa or in-addr.arpa
- echo " domain-insecure: $ifarpa"
- echo " local-zone: $ifarpa $UNBOUND_D_DOMAIN_TYPE"
- echo " local-data: \"$ifarpa. $UNBOUND_XSOA\""
- echo " local-data: \"$ifarpa. $UNBOUND_XNS\""
- echo
- } >> $UNBOUND_CONFFILE
- fi
- done
- fi
-
-
- {
- # avoid upstream involvement in RFC6762
- echo " domain-insecure: local"
- echo " private-domain: local"
- echo " local-zone: local $UNBOUND_D_DOMAIN_TYPE"
- echo " local-data: \"local. $UNBOUND_XSOA\""
- echo " local-data: \"local. $UNBOUND_XNS\""
- echo " local-data: \"local. 3600 IN TXT RFC6762\""
- echo
- # type static means only this router has your domain
- # type transparent will permit forward-zone: or stub-zone: clauses
- echo " domain-insecure: $UNBOUND_TXT_DOMAIN"
- echo " private-domain: $UNBOUND_TXT_DOMAIN"
- echo " local-zone: $UNBOUND_TXT_DOMAIN $UNBOUND_D_DOMAIN_TYPE"
- echo " local-data: \"$UNBOUND_TXT_DOMAIN. $UNBOUND_XSOA\""
- echo " local-data: \"$UNBOUND_TXT_DOMAIN. $UNBOUND_XNS\""
- echo
- } >> $UNBOUND_CONFFILE
- ;;
-
- *)
- # likely transparent domain with fordward-zone: clause to next router
- echo " domain-insecure: $UNBOUND_TXT_DOMAIN"
- echo " private-domain: $UNBOUND_TXT_DOMAIN"
- echo " local-zone: $UNBOUND_TXT_DOMAIN $UNBOUND_D_DOMAIN_TYPE"
- echo
- ;;
- esac
-
-
- if [ "$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_AUTH_ROOT "$cfg" prefetch_root 0
- config_get_bool UNBOUND_B_LOCL_BLCK "$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 [ "$UNBOUND_TTL_MIN" -gt 1800 ] ; then
- logger -t unbound -s "ttl_min could have had awful side effects, using 300"
- UNBOUND_TTL_MIN=300
- fi
- }
-
- ##############################################################################
-
- unbound_resolv_setup() {
- if [ "$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
- }
-
- ##############################################################################
-
- unbound_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_auth_root
- unbound_control
- fi
-
-
- unbound_resolv_setup
- }
-
- ##############################################################################
-
- unbound_stop() {
- unbound_resolv_teardown
- rootzone_update
- }
-
- ##############################################################################
-
|