--- /dev/null
+#!/usr/bin/awk
+##############################################################################
+#
+# 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
+#
+##############################################################################
+#
+# Turn DHCP records into meaningful A, AAAA, and PTR records. Also lift a
+# function from dnsmasq and use DHCPv4 MAC to find IPV6 SLAAC hosts.
+#
+# External Parameters
+# "hostfile" = where this script will cache host DNS data
+# "domain" = text domain suffix
+# "bslaac" = boolean, use DHCPv4 MAC to find GA and ULA IPV6 SLAAC
+# "bisolt" = boolean, format <host>.<network>.<domain>. so you can isolate
+#
+##############################################################################
+
+/^#/ {
+ # We need to pick out DHCP v4 or v6 records
+ net = $2 ; id = $3 ; cls = $4 ; hst = $5 ; adr = $9 ;
+ cdr = adr ;
+ sub( /\/.*/, "", adr ) ;
+ sub( /.*\//, "", cdr ) ;
+
+
+ if ( bisolt == 1 ) {
+ # TODO: this might be better with a substituion option,
+ # or per DHCP pool do-not-DNS option, but its getting busy here.
+ fqdn = net
+ fqdn = sub( /\./, "-", fqdn ) ;
+ fqdn = tolower( hst "." fqdn "." domain ) ;
+ }
+
+ else {
+ fqdn = tolower( hst "." domain ) ;
+ }
+
+
+ if ( cls == "ipv4" ) {
+ if ( NF == 8 ) {
+ # odhcpd errata in field format without host name
+ adr = $8 ; hst = "-" ; cdr = adr ;
+ sub( /\/.*/, "", adr ) ;
+ sub( /.*\//, "", cdr ) ;
+ }
+
+
+ if (( cdr == 32 ) && ( hst != "-" )) {
+ # only for provided hostnames and full /32 assignments
+ ptr = adr ; qpr = "" ; split( ptr, ptr, "." ) ;
+ slaac = slaac_eui64( id ) ;
+ for( i=1; i<=4; i++ ) { qpr = ( ptr[i] "." qpr) ; }
+
+ # DHCP A and PTR records with FQDN
+ x = ( fqdn ". 120 IN A " adr ) ;
+ y = ( qpr "in-addr.arpa. 120 IN PTR " fqdn ) ;
+ print ( x "\n" y ) > hostfile ;
+
+
+ if ((bslaac == 1) && (slaac != 0)) {
+ # UCI option to discover IPV6 routed SLAAC addresses
+ # NOT TODO - ping probe take too long when added in awk-rule loop
+ cmd = ( "ip -6 --oneline route show dev " net ) ;
+
+
+ while ( ( cmd | getline adr ) > 0 ) {
+ if ( substr( adr, 1, 5 ) <= "fd00:" ) {
+ # GA or ULA routed addresses only (not LL or MC)
+ sub( /\/.*/, "", adr ) ;
+ adr = ( adr slaac ) ;
+ if ( split( adr, tmp0, ":" ) >= 8 ) { sub( "::", ":", adr ) ; }
+ qpr = ipv6_ptr( adr ) ;
+ x = ( fqdn ". 120 IN AAAA " adr ) ;
+ y = ( qpr " 120 IN PTR " fqdn ) ;
+ print ( x "\n" y ) > hostfile ;
+ }
+ }
+
+
+ close( cmd ) ;
+ }
+ }
+ }
+
+ else {
+ if (( cdr == 128 ) && ( hst != "-" )) {
+ # only for provided hostnames and full /128 assignments
+ qpr = ipv6_ptr( adr ) ;
+ x = ( fqdn ". 120 IN AAAA " adr ) ;
+ y = ( qpr " 120 IN PTR " fqdn ) ;
+ print ( x "\n" y ) > hostfile ;
+ }
+ }
+}
+
+##############################################################################
+
+function ipv6_ptr( ipv6, arpa, ary, end, i, j, new6, sz, start ) {
+ # IPV6 colon flexibility is a challenge when creating [ptr].ip6.arpa.
+ sz = split( ipv6, ary, ":" ) ; end = 9 - sz ;
+
+
+ for( i=1; i<=sz; i++ ) {
+ if( length(ary[i]) == 0 ) {
+ for( j=1; j<=end; j++ ) { ary[i] = ( ary[i] "0000" ) ; }
+ }
+
+ else {
+ ary[i] = substr( ( "0000" ary[i] ), length( ary[i] )+5-4 ) ;
+ }
+ }
+
+
+ new6 = ary[1] ;
+ for( i = 2; i <= sz; i++ ) { new6 = ( new6 ary[i] ) ; }
+ start = length( new6 ) ;
+ for( i=start; i>0; i-- ) { arpa = ( arpa substr( new6, i, 1 ) ) ; } ;
+ gsub( /./, "&\.", arpa ) ; arpa = ( arpa "ip6.arpa" ) ;
+
+ return arpa ;
+}
+
+##############################################################################
+
+function slaac_eui64( mac, ary, glbit, eui64 ) {
+ if ( length(mac) >= 12 ) {
+ # RFC2373 and use DHCPv4 registered MAC to find SLAAC addresses
+ split( mac , ary , "" ) ;
+ glbit = ( "0x" ary[2] ) ;
+ glbit = sprintf( "%d", glbit ) ;
+ glbit = or( glbit, 2 ) ;
+ ary[2] = sprintf( "%x", glbit ) ;
+ eui64 = ( ary[1] ary[2] ary[3] ary[4] ":" ary[5] ary[6] "ff:fe" ) ;
+ eui64 = ( eui64 ary[7] ary[8] ":" ary[9] ary[10] ary[11] ary[12] ) ;
+ }
+
+ else {
+ eui64 = 0 ;
+ }
+
+
+ return eui64 ;
+}
+
+##############################################################################
+
--- /dev/null
+#!/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 script facilitates alternate installation of Unbound+odhcpd and no
+# need for dnsmasq. There are some limitations, but it works and is small.
+# The lease file is parsed to make "zone-data:" and "local-data:" entries.
+#
+# config odhcpd 'odhcpd'
+# option leasetrigger '/usr/lib/unbound/odhcpd.sh'
+#
+##############################################################################
+
+# Common file location definitions
+. /usr/lib/unbound/unbound.sh
+
+##############################################################################
+
+odhcpd_settings() {
+ # This trigger is out of normal init context, so we need to read some UCI.
+ local cfg="$1"
+ config_get UNBOUND_D_DHCP_LINK "$cfg" dhcp_link none
+ config_get_bool UNBOUND_B_SLAAC6_MAC "$cfg" dhcp4_slaac6 0
+}
+
+##############################################################################
+
+odhcpd_zonedata() {
+ local dns_ls_add=$UNBOUND_VARDIR/dhcp_dns.add
+ local dns_ls_del=$UNBOUND_VARDIR/dhcp_dns.del
+ local dhcp_ls_new=$UNBOUND_VARDIR/dhcp_lease.new
+ local dhcp_ls_old=$UNBOUND_VARDIR/dhcp_lease.old
+ local dhcp_ls_add=$UNBOUND_VARDIR/dhcp_lease.add
+ local dhcp_ls_del=$UNBOUND_VARDIR/dhcp_lease.del
+ local dhcp_origin=$( uci get dhcp.@odhcpd[0].leasefile )
+
+ config_load unbound
+ config_foreach odhcpd_settings unbound
+
+
+ if [ "$UNBOUND_D_DHCP_LINK" = "odhcpd" -a -f "$dhcp_origin" ] ; then
+ # Capture the lease file which could be changing often,
+ # and unbound-control only for changes in hosts (or else...)
+ cat $dhcp_origin | sort > $dhcp_ls_new
+ touch $dhcp_ls_old
+ sort $dhcp_ls_new $dhcp_ls_old $dhcp_ls_old | uniq -u > $dhcp_ls_add
+ sort $dhcp_ls_old $dhcp_ls_new $dhcp_ls_new | uniq -u > $dhcp_ls_del
+
+ # Go through the messy business of coding up A, AAAA, and PTR records.
+ awk -v hostfile=$dns_ls_del -v domain=$UNBOUND_TXT_DOMAIN \
+ -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 \
+ -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_del
+
+ awk -v hostfile=$dns_ls_add -v domain=$UNBOUND_TXT_DOMAIN \
+ -v bslaac=$UNBOUND_B_SLAAC6_MAC -v bisolt=0 \
+ -f /usr/lib/unbound/odhcpd.awk $dhcp_ls_add
+
+
+ if [ -f "$dns_ls_del" ] ; then
+ cat $dns_ls_del | $UNBOUND_CONTROL_CFG local_datas_remove
+ fi
+
+
+ if [ -f "$dns_ls_add" ] ; then
+ cat $dns_ls_add | $UNBOUND_CONTROL_CFG local_datas
+ fi
+
+
+ # prepare next round
+ mv $dhcp_ls_new $dhcp_ls_old
+ rm -f $dns_ls_del $dns_ls_add
+ fi
+}
+
+##############################################################################
+
+odhcpd_zonedata
+
+##############################################################################
+
git.99rst.org / openwrt-packages.git / commitdiff