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dpavlin |
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#!/usr/bin/perl -w |
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############################################################ |
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# |
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# $Id: rrd-server.cgi 693 2006-06-26 19:11:42Z nicolaw $ |
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# rrd-server.cgi - Data gathering CGI script for RRD::Simple |
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# |
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# Copyright 2006, 2007 Nicola Worthington |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# |
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############################################################ |
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# vim:ts=4:sw=4:tw=78 |
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# User defined constants |
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dpavlin |
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use constant BASEDIR => '/var/www/rrd'; |
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dpavlin |
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############################################################ |
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use 5.6.1; |
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use warnings; |
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use strict; |
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use Socket; |
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# We'll need to print a header unless we're in MOD_PERL land |
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print "Content-type: plain/text\n\n" unless exists $ENV{MOD_PERL}; |
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my $host; |
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my $param = get_query($ENV{QUERY_STRING}); |
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my $remote_addr = $ENV{REMOTE_ADDR}; |
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# Take the host from the "target" if they know the "secret" |
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if (defined($ENV{RRD_SECRET}) && defined($param->{secret} && defined($param->{target})) |
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&& "$ENV{RRD_SECRET}" eq "$param->{secret}") { |
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$host = $param->{target}; |
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} else { |
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# Check for HTTP proxy source addresses |
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for (qw(HTTP_X_FORWARDED_FOR HTTP_VIA HTTP_CLIENT_IP HTTP_PROXY_CONNECTION |
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FORWARDED_FOR X_FORWARDED_FOR X_HTTP_FORWARDED_FOR HTTP_FORWARDED)) { |
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if (defined $ENV{$_} && $ENV{$_} =~ /([\d\.]+)/) { |
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my $ip = $1; |
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if (isIP($ip)) { |
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$remote_addr = $ip; |
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last; |
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} |
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} |
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} |
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# Fail if we can't see who is sending us this data |
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unless ($remote_addr) { |
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print "FAILED - NO REMOTE_ADDR\n"; |
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exit; |
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} |
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$host = ip2host($remote_addr); |
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my $ip = host2ip($host); |
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# Fail if we don't believe they are who their DNS says they are |
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if ("$ip" ne "$remote_addr") { |
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print "FAILED - FORWARD AND REVERSE DNS DO NOT MATCH\n"; |
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exit; |
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} |
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# Custom hostname flanges |
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$host = 'legolas.wd.tfb.net' if $host eq 'bb-87-80-233-47.ukonline.co.uk' || $ip eq '87.80.233.47'; |
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$host = 'pippin.wd.tfb.net' if $host eq '82.153.185.41' || $ip eq '82.153.185.41'; |
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$host = 'pippin.wd.tfb.net' if $host eq '82.153.185.40' || $ip eq '82.153.185.40'; |
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$host = 'isle-of-cats.etla.org' if $ip eq '82.71.23.88'; |
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} |
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# Build a list of valid pairs |
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my @pairs; |
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while (<>) { |
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#warn "$host $_"; |
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dpavlin |
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$host = $1 if m/^#\s*host\s*(\S+)/; |
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next unless /^\d+\.[\w\.\-\_\d]+\s+[\d\.]+\s*$/; |
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push @pairs, $_; |
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} |
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# Don't bother opening a pipe if there's nothing to sent |
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unless (@pairs) { |
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printf("OKAY - %s - no valid pairs\n", $host); |
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} else { |
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# Simply open a handle to the rrd-server.pl and send in the data |
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if (open(PH,'|-', BASEDIR."/bin/rrd-server.pl -u $host")) { |
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print PH $_ for @pairs; |
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close(PH); |
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printf("OKAY - %s - received %d pairs\n", $host, scalar(@pairs)); |
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# Say if we failed the customer :) |
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} else { |
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print "FAILED - UNABLE TO EXECUTE\n"; |
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} |
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} |
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exit; |
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sub get_query { |
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my $str = shift; |
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my $kv = {}; |
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$str =~ tr/&;/&/s; |
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$str =~ s/^[&;]+//, $str =~ s/[&;]+$//; |
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for (split /[&;]/, $str) { |
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my ($k,$v) = split(/=/, $_, 2); |
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next if $k eq ''; |
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$kv->{url_decode($k)} = url_decode($v); |
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} |
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return $kv; |
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} |
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sub url_decode { |
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local $_ = @_ ? shift : $_; |
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defined or return; |
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tr/+/ /; |
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s/%([a-fA-F0-9]{2})/pack "H2", $1/eg; |
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return $_; |
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} |
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sub ip2host { |
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my $ip = shift; |
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my @numbers = split(/\./, $ip); |
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my $ip_number = pack("C4", @numbers); |
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my ($host) = (gethostbyaddr($ip_number, 2))[0]; |
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if (defined $host && $host) { |
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return $host; |
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} else { |
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return $ip; |
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} |
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} |
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sub isIP { |
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return 0 unless defined $_[0]; |
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return 1 if $_[0] =~ /^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\. |
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(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\. |
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(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\. |
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(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/x; |
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return 0; |
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} |
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sub resolve { |
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return ip2host(@_) if isIP($_[0]); |
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return host2ip(@_); |
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} |
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sub host2ip { |
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my $host = shift; |
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my @addresses = gethostbyname($host); |
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if (@addresses > 0) { |
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@addresses = map { inet_ntoa($_) } @addresses[4 .. $#addresses]; |
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return wantarray ? @addresses : $addresses[0]; |
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} else { |
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return $host; |
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} |
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} |
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1; |
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