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+#!/usr/bin/perl -w
+#
+# Munin plugin to monitor Tor
+#
+# Author: Ge van Geldorp <ge@gse.nl>
+#
+# Parameters understood:
+#
+# host - Change which host to graph (default localhost)
+# port - Change which port to connect to (default 9051)
+# password - Plain-text control channel password (see torrc
+# HashedControlPassword parameter)
+# cookiefile - Name of the file containing the control channel cookie
+# (see torrc CookieAuthentication parameter)
+#
+# Using HashedControlPassword authentication has the problem that you must
+# include the plain-text password in the munin config file. To have any
+# effect, that file shouldn't be world-readable.
+# If you're using CookieAuthentication, you should run this plugin as a user
+# which has read access to the tor datafiles. Also note that bugs in versions
+# upto and including 0.1.1.20 prevent CookieAuthentication from working.
+#
+# Usage: place in /etc/munin/node.d/ (or link it there using ln -s)
+#
+# Parameters understood:
+# config (required)
+# autoconf (optional - used by munin-config)
+#
+#
+# Magic markers - optional - used by installation scripts and
+# munin-config:
+#
+#%# family=contrib
+#%# capabilities=autoconf
+
+use strict;
+use IO::Socket::INET;
+
+# Config
+our $address = $ENV{host} || "localhost"; # Default: localhost
+our $port = $ENV{port} || 9051; # Default: 9051
+
+# Don't edit below this line
+
+sub Authenticate
+{
+ my ($socket) = @_;
+ my $authline = "AUTHENTICATE";
+ if (defined($ENV{cookiefile})) {
+ if (open(COOKIE, "<$ENV{cookiefile}")) {
+ binmode COOKIE;
+ my $cookie;
+ $authline .= " ";
+ while (read(COOKIE, $cookie, 32)) {
+ foreach my $byte (unpack "C*", $cookie) {
+ $authline .= sprintf "%02x", $byte;
+ }
+ }
+ close COOKIE;
+ }
+ } elsif (defined($ENV{password})) {
+ $authline .= ' "' . $ENV{password} . '"';
+ }
+ print $socket "$authline\r\n";
+ my $replyline = <$socket>;
+ if (substr($replyline, 0, 1) != '2') {
+ $replyline =~ s/\s*$//;
+ return "Failed to authenticate: $replyline";
+ }
+
+ return;
+}
+
+if ($ARGV[0] and $ARGV[0] eq "autoconf") {
+ # Try to connect to the daemon
+ my $socket = IO::Socket::INET->new("$address:$port")
+ or my $failed = 1;
+
+ if ($failed) {
+ print "no (failed to connect to $address port $port)\n";
+ exit 1;
+ }
+
+ my $msg = Authenticate($socket);
+ if (defined($msg)) {
+ print $socket "QUIT\r\n";
+ close($socket);
+ print "no ($msg)\n";
+ exit 1;
+ }
+
+ print $socket "QUIT\r\n";
+ close($socket);
+ print "yes\n";
+ exit 0;
+}
+
+my %connections = ("new", 0,
+ "launched", 0,
+ "connected", 0,
+ "failed", 0,
+ "closed", 0);
+
+if ($ARGV[0] and $ARGV[0] eq "config") {
+ print "graph_title Connections\n";
+ print "graph_args -l 0 --base 1000\n";
+ print "graph_vlabel connections\n";
+ print "graph_category Tor\n";
+ print "graph_period second\n";
+ print "graph_info This graph shows the number of Tor OR connections.\n";
+
+ foreach my $status (keys %connections) {
+ print "$status.label $status\n";
+ print "$status.type GAUGE\n";
+ print "$status.max 50000\n";
+ print "$status.min 0\n";
+ }
+
+ exit 0;
+}
+
+my $socket = IO::Socket::INET->new("$address:$port")
+ or die("Couldn't connect to $address port $port: $!");
+
+my $msg = Authenticate($socket);
+if (defined($msg)) {
+ print $socket "QUIT\r\n";
+ close($socket);
+ die "$msg\n";
+}
+
+print $socket "GETINFO orconn-status\r\n";
+my $replyline = <$socket>;
+if (substr($replyline, 0, 1) != '2') {
+ print $socket "QUIT\r\n";
+ close($socket);
+ $replyline =~ s/\s*$//;
+ die "Failed to get orconn-status info: $replyline\n";
+}
+
+while (! (($replyline = <$socket>) =~ /^\.\s*$/)) {
+ my @reply = split(/\s+/, $replyline);
+ $connections{lc($reply[1])}++;
+}
+$replyline = <$socket>;
+if (substr($replyline, 0, 1) != '2') {
+ print $socket "QUIT\r\n";
+ close($socket);
+ $replyline =~ s/\s*$//;
+ die "Failed to authenticate: $replyline\n";
+}
+
+print $socket "QUIT\r\n";
+close($socket);
+
+while (my ($status, $count) = each(%connections)) {
+ print "$status.value $count\n";
+}
+
+exit 0;
+
+# vim:syntax=perl