#!/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 # ############################################################################## # # This crosses over to the dnsmasq UCI file "dhcp" and parses it for fields # that will allow Unbound to request local host DNS of dnsmasq. We need to look # at the interfaces in "dhcp" and get their subnets. The Unbound conf syntax # makes this a little difficult. First in "server:" we need to create private # zones for the domain and PTR records. Then we need to create numerous # "forward:" clauses to forward those zones to dnsmasq. # ############################################################################## # while useful (sh)ellcheck is pedantic and noisy # shellcheck disable=1091,2002,2004,2034,2039,2086,2094,2140,2154,2155 DM_D_WAN_FQDN=0 DM_LIST_KNOWN_ZONES="invalid" DM_LIST_TRN_ZONES="" DM_LIST_LOCAL_DATA="" DM_LIST_LOCAL_PTR="" DM_LIST_FWD_PORTS="" DM_LIST_FWD_ZONES="" ############################################################################## create_local_zone() { local target="$1" local partial domain found case $DM_LIST_TRN_ZONES in *"${target}"*) found=1 ;; *) case $target in [A-Za-z0-9]*.[A-Za-z0-9]*) found=0 ;; *) # no dots found=1 ;; esac esac 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 }' ) DM_LIST_TRN_ZONES="$DM_LIST_TRN_ZONES $partial" DM_LIST_KNOWN_ZONES="$DM_LIST_KNOWN_ZONES $partial" fi } ############################################################################## create_host_record() { local cfg="$1" local ip name debug_ip # basefiles dhcp "domain" clause which means host A, AAAA, and PRT record config_get ip "$cfg" ip config_get name "$cfg" name if [ -n "$name" ] && [ -n "$ip" ] ; then create_local_zone "$name" case $ip in fe[89ab][0-9a-f]:*|169.254.*) debug_ip="$ip@$name" ;; [1-9a-f]*:*[0-9a-f]) DM_LIST_LOCAL_DATA="$DM_LIST_LOCAL_DATA $name.@@300@@IN@@AAAA@@$ip" DM_LIST_LOCAL_PTR="$DM_LIST_LOCAL_PTR $ip@@300@@$name" ;; [1-9]*.*[0-9]) DM_LIST_LOCAL_DATA="$DM_LIST_LOCAL_DATA $name.@@300@@IN@@A@@$ip" DM_LIST_LOCAL_PTR="$DM_LIST_LOCAL_PTR $ip@@300@@$name" ;; esac fi } ############################################################################## create_mx_record() { local cfg="$1" local domain relay pref record # Insert a static MX record config_get domain "$cfg" domain config_get relay "$cfg" relay config_get pref "$cfg" pref 10 if [ -n "$domain" ] && [ -n "$relay" ] ; then create_local_zone "$domain" record="$domain.@@300@@IN@@MX@@$pref@@$relay." DM_LIST_LOCAL_DATA="$DM_LIST_LOCAL_DATA $record" fi } ############################################################################## create_srv_record() { local cfg="$1" local srv target port class weight record # Insert a static SRV record such as SIP server config_get srv "$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 "$srv" ] && [ -n "$target" ] && [ -n "$port" ] ; then create_local_zone "$srv" record="$srv.@@300@@IN@@SRV@@$class@@$weight@@$port@@$target." DM_LIST_LOCAL_DATA="$DM_LIST_LOCAL_DATA $record" fi } ############################################################################## create_cname_record() { local cfg="$1" local cname target record # Insert static CNAME record config_get cname "$cfg" cname config_get target "$cfg" target if [ -n "$cname" ] && [ -n "$target" ] ; then create_local_zone "$cname" record="$cname.@@300@@IN@@CNAME@@$target." DM_LIST_LOCAL_DATA="$DM_LIST_LOCAL_DATA $record" fi } ############################################################################## dnsmasq_local_zone() { local cfg="$1" local fwd_port fwd_domain wan_fqdn # dnsmasq domain and interface assignment settings will control config config_get fwd_domain "$cfg" domain config_get fwd_port "$cfg" port config_get wan_fqdn "$cfg" add_wan_fqdn if [ -n "$wan_fqdn" ] ; then DM_D_WAN_FQDN=$wan_fqdn fi if [ -n "$fwd_domain" ] && [ -n "$fwd_port" ] \ && [ ! ${fwd_port:-53} -eq 53 ] ; then # dnsmasq localhost listening ports (possible multiple instances) DM_LIST_FWD_PORTS="$DM_LIST_FWD_PORTS $fwd_port" DM_LIST_FWD_ZONES="$DM_LIST_FWD_ZONES $fwd_domain" fi } ############################################################################## dnsmasq_local_arpa() { local ifarpa ifsubnet if [ -n "$UB_LIST_NETW_LAN" ] ; then for ifsubnet in $UB_LIST_NETW_LAN ; do ifarpa=$( domain_ptr_any "${ifsubnet#*@}" ) DM_LIST_FWD_ZONES="$DM_LIST_FWD_ZONES $ifarpa" done fi if [ -n "$UB_LIST_NETW_WAN" ] && [ $DM_D_WAN_FQDN -gt 0 ] ; then for ifsubnet in $UB_LIST_NETW_WAN ; do ifarpa=$( domain_ptr_any "${ifsubnet#*@}" ) DM_LIST_FWD_ZONES="$DM_LIST_FWD_ZONES $ifarpa" done fi } ############################################################################## dnsmasq_inactive() { local record if [ $UB_D_EXTRA_DNS -gt 0 ] ; then # Parasite from the uci.dhcp.domain clauses DM_LIST_KNOWN_ZONES="$DM_LIST_KNOWN_ZONES $UB_TXT_DOMAIN" config_load dhcp config_foreach create_host_record domain if [ $UB_D_EXTRA_DNS -gt 1 ] ; then config_foreach create_srv_record srvhost config_foreach create_mx_record mxhost fi if [ $UB_D_EXTRA_DNS -gt 2 ] ; then config_foreach create_cname_record cname fi { echo "# $UB_SRVMASQ_CONF generated by UCI $( date -Is )" if [ -n "$DM_LIST_TRN_ZONES" ] ; then for record in $DM_LIST_TRN_ZONES ; do echo " local-zone: $record transparent" done echo fi if [ -n "$DM_LIST_LOCAL_DATA" ] ; then for record in $DM_LIST_LOCAL_DATA ; do echo " local-data: \"${record//@@/ }\"" done echo fi if [ -n "$DM_LIST_LOCAL_PTR" ] ; then for record in $DM_LIST_LOCAL_PTR ; do echo " local-data-ptr: \"${record//@@/ }\"" done echo fi } > $UB_SRVMASQ_CONF fi } ############################################################################## dnsmasq_active() { # Look at dnsmasq settings config_load dhcp # Zone for DHCP / SLAAC-PING DOMAIN config_foreach dnsmasq_local_zone dnsmasq # Zone for DHCP / SLAAC-PING ARPA dnsmasq_local_arpa if [ -n "$DM_LIST_FWD_PORTS" ] && [ -n "$DM_LIST_FWD_ZONES" ] ; then if [ $UB_B_DNS_ASSIST -lt 1 ] ; then { # Forward to dnsmasq on same host for DHCP lease hosts echo "# $UB_SRVMASQ_CONF generated by UCI $( date -Is )" echo " do-not-query-localhost: no" echo } > $UB_SRVMASQ_CONF else echo > $UB_SRVMASQ_CONF fi echo "# $UB_EXTMASQ_CONF generated by UCI $( date -Is )" > $UB_EXTMASQ_CONF for fwd_domain in $DM_LIST_FWD_ZONES ; do { # This creates a domain with local privledges echo " domain-insecure: $fwd_domain" echo " private-domain: $fwd_domain" echo " local-zone: $fwd_domain transparent" echo } >> $UB_SRVMASQ_CONF { # This is derived from dnsmasq local domain and dhcp service subnets echo "forward-zone:" echo " name: $fwd_domain" echo " forward-first: no" for port in $DM_LIST_FWD_PORTS ; do echo " forward-addr: 127.0.0.1@$port" done echo } >> $UB_EXTMASQ_CONF done fi } ############################################################################## dnsmasq_link() { if [ "$UB_D_DHCP_LINK" = "dnsmasq" ] ; then dnsmasq_active else dnsmasq_inactive fi } ##############################################################################