Viewing file:  loclist.pl (3.13 KB) -rw-r--r--
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#!/usr/bin/perl
# loclist.pl -- check a list of hostnames for LOC records
# -v -- verbose output (include NO results). used to be the default
# -n -- try looking for network LOC records as well (slower)
# -r -- try doing reverse-resolution on IP-appearing hosts
# -d -- debugging output
# egrep 'loc2earth.*host' /serv/www/logs/wn.log |
# perl -pe 's/^.*host=//; s/([a-zA-Z0-9.-]+).*/$1/' |
# sort -u | ~/loclist.pl > loc.sites
use strict;
use warnings;
use Net::DNS '0.08';
use Getopt::Std;
getopts('vnrd');
$res = Net::DNS::Resolver->new();
line:
while (<>) {
chomp;
$foundloc = $namefound = 0;
next line if m/^$/;
next line if m/[^\w.-\/+_]/; # /, +, _ not actually valid in hostnames
print STDERR "$_ DEBUG looking up...\n" if $opt_d;
if (m/^\d+\.\d+\.\d+\.\d+$/) {
if ($opt_r) {
$query = $res->query($_);
if (defined ($query)) {
foreach my $ans ($query->answer) {
if ($ans->type eq "PTR") {
$_ = $ans->ptrdname;
$namefound++;
}
}
}
}
next line unless $namefound;
}
$query = $res->query($_,"LOC");
if (defined ($query)) { # then we got an answer of some sort
foreach my $ans ($query->answer) {
if ($ans->type eq "LOC") {
print "$_ YES ",$ans->rdatastr,"\n";
$foundloc++;
}
}
}
if ($opt_n && !$foundloc) { # try the RFC 1101 search bit
@addrs = @netnames = ();
$query = $res->query($_,"A");
if (defined ($query)) {
foreach my $ans ($query->answer) {
if ($ans->type eq "A") {
push(@addrs,$ans->address);
}
}
}
if (@addrs) {
checkaddrs:
foreach my $ipstr (@addrs) {
$ipnum = unpack("N",pack("CCCC",split(/\./,$ipstr,4)));
($ip1) = split(/\./,$ipstr);
if ($ip1 >= 224) { # class D/E, treat as host addr
$mask = 0xFFFFFFFF;
} elsif ($ip1 >= 192) { # "class C"
$mask = 0xFFFFFF00;
} elsif ($ip1 >= 128) { # "class B"
$mask = 0xFFFF0000;
} else { # class A
$mask = 0xFF000000;
}
$oldmask = 0;
while ($oldmask != $mask) {
$oldmask = $mask;
$querystr =
join(".", reverse (unpack("CCCC",pack("N",$ipnum & $mask))))
. ".in-addr.arpa";
$query = $res->query($querystr,"PTR");
if (defined ($query)) {
foreach my $ans ($query->answer) {
if ($ans->type eq "PTR") {
# we want the list in LIFO order
unshift(@netnames,$ans->ptrdname);
}
}
$query = $res->query($querystr,"A");
if (defined ($query)) {
foreach my $ans ($query->answer) {
if ($ans->type eq "A") {
$mask = unpack("L",pack("CCCC",
split(/\./,$ans->address,4)));
}
}
}
}
}
if (@netnames) {
foreach my $network (@netnames) {
$query = $res->query($network,"LOC");
if (defined ($query)) {
foreach my $ans ($query->answer) {
if ($ans->type eq "LOC") {
print "$_ YES ",$ans->rdatastr,"\n";
$foundloc++;
last checkaddrs;
} elsif ($ans->type eq "CNAME") {
# XXX should follow CNAME chains here
}
}
}
}
}
}
}
}
if ($opt_v && !$foundloc) {
print "$_ NO\n";
}
}
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