mirror of
https://github.com/openwrt/packages.git
synced 2025-12-21 19:14:30 +04:00
4a72200214
Current odhcpd in master writes MAC addresses with colons in his lease file, this new odhcpd format leads to a crash loop in unbound (if DHCPv4 to SLAAC is selected). Just remove the colons, before the processing in slaac_eui64 begins, fixes #28032 Signed-off-by: Dirk Brenken <dev@brenken.org>
263 lines
8.1 KiB
Awk
263 lines
8.1 KiB
Awk
#!/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
|
|
# "conffile" = Unbound configuration left for a restart
|
|
# "pipefile" = DNS entries for unbound-control standard input
|
|
# "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
|
|
# "bconf" = boolean, write conf file with pipe records
|
|
# "exclude_ipv6_ga" = boolean, exclude IPv6 GA addresses from local-data
|
|
#
|
|
##############################################################################
|
|
|
|
/^#/ {
|
|
# We need to pick out DHCP v4 or v6 records
|
|
net = $2 ; id = $3 ; cls = $4 ; hst = $5 ; adr = $9 ; adr2 = $10
|
|
cdr = adr ;
|
|
cdr2 = adr2 ;
|
|
sub( /\/.*/, "", adr ) ;
|
|
sub( /.*\//, "", cdr ) ;
|
|
sub( /\/.*/, "", adr2 ) ;
|
|
sub( /.*\//, "", cdr2 ) ;
|
|
gsub( /_/, "-", hst ) ;
|
|
|
|
if ( hst !~ /^[[:alnum:]]([-[:alnum:]]*[[:alnum:]])?$/ ) {
|
|
# that is not a valid host name (RFC1123)
|
|
# above replaced common error of "_" in host name with "-"
|
|
hst = "-" ;
|
|
}
|
|
|
|
if ( bisolt == 1 ) {
|
|
# TODO: this might be better with a substitution option,
|
|
# or per DHCP pool do-not-DNS option, but its getting busy here.
|
|
fqdn = net
|
|
gsub( /\./, "-", fqdn ) ;
|
|
fqdn = tolower( hst "." fqdn "." domain ) ;
|
|
}
|
|
|
|
else {
|
|
fqdn = tolower( hst "." domain ) ;
|
|
}
|
|
|
|
if ((cls == "ipv4") && (hst != "-") && (cdr == 32) && (NF == 9)) {
|
|
# IPV4 ; only for provided hostnames and full /32 assignments
|
|
# NF=9 ; odhcpd errata in field format without host name
|
|
ptr = adr ; qpr = "" ; split( ptr, ptrarr, "." ) ;
|
|
slaac = slaac_eui64( id ) ;
|
|
|
|
if ( bconf == 1 ) {
|
|
x = ( "local-data: \"" fqdn ". 300 IN A " adr "\"" ) ;
|
|
y = ( "local-data-ptr: \"" adr " 300 " fqdn "\"" ) ;
|
|
print ( x "\n" y "\n" ) > conffile ;
|
|
}
|
|
|
|
# always create the pipe file
|
|
for( i=1; i<=4; i++ ) { qpr = ( ptrarr[i] "." qpr) ; }
|
|
x = ( fqdn ". 300 IN A " adr ) ;
|
|
y = ( qpr "in-addr.arpa. 300 IN PTR " fqdn ) ;
|
|
print ( x "\n" y ) > pipefile ;
|
|
|
|
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 ) <= "fdff:" ) \
|
|
&& ( index( adr, "::/" ) != 0 ) \
|
|
&& ( index( adr, "anycast" ) == 0 ) \
|
|
&& ( index( adr, "via" ) == 0 )) {
|
|
if ( exclude_ipv6_ga == 1 && ipv6_in_range(adr) ) {
|
|
printf "Excluding GA IPv6 address: %s for %s\n", \
|
|
adr, fqdn | "logger -t unbound-odhcpd"
|
|
continue
|
|
}
|
|
sub( /\/.*/, "", adr ) ;
|
|
adr = ( adr slaac ) ;
|
|
|
|
if ( split( adr, tmp0, ":" ) > 8 ) {
|
|
sub( "::", ":", adr ) ;
|
|
}
|
|
|
|
if ( bconf == 1 ) {
|
|
x = ( "local-data: \"" fqdn ". 300 IN AAAA " adr "\"" ) ;
|
|
y = ( "local-data-ptr: \"" adr " 300 " fqdn "\"" ) ;
|
|
print ( x "\n" y "\n" ) > conffile ;
|
|
}
|
|
|
|
# always create the pipe file
|
|
qpr = ipv6_ptr( adr ) ;
|
|
x = ( fqdn ". 300 IN AAAA " adr ) ;
|
|
y = ( qpr ". 300 IN PTR " fqdn ) ;
|
|
print ( x "\n" y ) > pipefile ;
|
|
}
|
|
}
|
|
|
|
close( cmd ) ;
|
|
}
|
|
}
|
|
|
|
else if ((cls != "ipv4") && (hst != "-") && (9 <= NF) && (NF <= 10)) {
|
|
if (cdr == 128) {
|
|
if ( exclude_ipv6_ga == 1 && ipv6_in_range(adr) ) {
|
|
printf "Excluding GA IPv6 address: %s for %s\n", \
|
|
adr, fqdn | "logger -t unbound-odhcpd"
|
|
}
|
|
else {
|
|
if ( bconf == 1 ) {
|
|
x = ( "local-data: \"" fqdn ". 300 IN AAAA " adr "\"" ) ;
|
|
y = ( "local-data-ptr: \"" adr " 300 " fqdn "\"" ) ;
|
|
print ( x "\n" y "\n" ) > conffile ;
|
|
}
|
|
|
|
# only for provided hostnames and full /128 assignments
|
|
qpr = ipv6_ptr( adr ) ;
|
|
x = ( fqdn ". 300 IN AAAA " adr ) ;
|
|
y = ( qpr ". 300 IN PTR " fqdn ) ;
|
|
print ( x "\n" y ) > pipefile ;
|
|
}
|
|
}
|
|
|
|
if (cdr2 == 128) {
|
|
if ( exclude_ipv6_ga == 1 && ipv6_in_range(adr2) ) {
|
|
printf "Excluding GA IPv6 address: %s for %s\n", \
|
|
adr2, fqdn | "logger -t unbound-odhcpd"
|
|
}
|
|
else {
|
|
if ( bconf == 1 ) {
|
|
x = ( "local-data: \"" fqdn ". 300 IN AAAA " adr2 "\"" ) ;
|
|
y = ( "local-data-ptr: \"" adr2 " 300 " fqdn "\"" ) ;
|
|
print ( x "\n" y "\n" ) > conffile ;
|
|
}
|
|
|
|
# odhcp puts GA and ULA on the same line (position 9 and 10)
|
|
qpr2 = ipv6_ptr( adr2 ) ;
|
|
x = ( fqdn ". 300 IN AAAA " adr2 ) ;
|
|
y = ( qpr2 ". 300 IN PTR " fqdn ) ;
|
|
print ( x "\n" y ) > pipefile ;
|
|
}
|
|
}
|
|
}
|
|
|
|
else {
|
|
# dump non-conforming lease records
|
|
}
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
function ipv6_ptr( ipv6, arpa, ary, end, m, n, new6, sz, start ) {
|
|
# IPV6 colon flexibility is a challenge when creating [ptr].ip6.arpa.
|
|
sz = split( ipv6, ary, ":" ) ; end = 9 - sz ;
|
|
|
|
for( m=1; m<=sz; m++ ) {
|
|
if( length(ary[m]) == 0 ) {
|
|
for( n=1; n<=end; n++ ) { ary[m] = ( ary[m] "0000" ) ; }
|
|
}
|
|
|
|
else {
|
|
ary[m] = substr( ( "0000" ary[m] ), length( ary[m] )+5-4 ) ;
|
|
}
|
|
}
|
|
|
|
new6 = ary[1] ;
|
|
for( m = 2; m <= sz; m++ ) { new6 = ( new6 ary[m] ) ; }
|
|
start = length( new6 ) ;
|
|
for( m=start; m>0; m-- ) { arpa = ( arpa substr( new6, m, 1 ) ) ; } ;
|
|
gsub( /./, "&.", arpa ) ; arpa = ( arpa "ip6.arpa" ) ;
|
|
|
|
return arpa ;
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
function slaac_eui64( mac, ary, glbit, eui64 ) {
|
|
# Remove any colons from mac
|
|
gsub(":", "", mac) ;
|
|
|
|
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 ;
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
function normalize_ipv6(ip, parts, normalized) {
|
|
# Remove any prefix length
|
|
sub(/\/.*/, "", ip);
|
|
|
|
# Handle compressed notation (::)
|
|
if (index(ip, "::") > 0) {
|
|
split(ip, parts, "::");
|
|
# Count colons to determine how many zero groups to insert
|
|
gsub(/:/, ":", parts[1]);
|
|
if (parts[2] != "") gsub(/:/, ":", parts[2]);
|
|
missing = 8 - (split(parts[1], tmp1, ":") + split(parts[2], tmp2, ":"));
|
|
|
|
# Build normalized address
|
|
normalized = parts[1];
|
|
for (i = 0; i < missing; i++) normalized = normalized ":0";
|
|
if (parts[2] != "") normalized = normalized ":" parts[2];
|
|
} else {
|
|
normalized = ip;
|
|
}
|
|
|
|
# Fill each group with leading zeros
|
|
split(normalized, parts, ":");
|
|
normalized = "";
|
|
for (i = 1; i <= length(parts); i++) {
|
|
if (parts[i] == "") parts[i] = "0";
|
|
while (length(parts[i]) < 4) {
|
|
parts[i] = "0" parts[i];
|
|
}
|
|
if (i > 1) normalized = normalized ":";
|
|
normalized = normalized parts[i];
|
|
}
|
|
|
|
return normalized;
|
|
}
|
|
|
|
function ipv6_in_range(ip) {
|
|
# Normalize the address first
|
|
ip = normalize_ipv6(ip);
|
|
|
|
# Check if it's in 2000::/3 range
|
|
# This covers 2000:: to 3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
|
|
first_group = substr(ip, 1, 4);
|
|
first_digit = substr(first_group, 1, 1);
|
|
|
|
return (first_digit == "2" || first_digit == "3");
|
|
}
|
|
|