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