added tcpping probe

1 files changed, 164 insertions, 0 deletions

diff --git a/lib/Smokeping/probes/TCPPing.pm b/lib/Smokeping/probes/TCPPing.pm
new file mode 100644
index 0000000..a6da253
--- /dev/null
+++ b/lib/Smokeping/probes/TCPPing.pm
@@ -0,0 +1,164 @@
+package Smokeping::probes::TCPPing;
+
+=head1 NAME
+
+probes::TCPPing - TCPPing Probe for SmokePing
+
+=head1 SYNOPSIS
+
+ *** Probes ***
+ + TCPPing
+ binary = /usr/bin/tcpping
+ forks = 10
+
+ *** Targets ***
+ port = 80
+
+=head1 DESCRIPTION
+
+Integrates TCPPing as a probe into smokeping. The variable B<binary> must
+point to your copy of the TCPPing program. If it is not installed on
+your system yet, you can get it from http://www.vdberg.org/~richard/tcpping.
+You can also get it from http://www.darkskies.za.net/~norman/scripts/tcpping.
+
+The (optional) port option lets you configure the port for the pings sent.
+The TCPPing manpage has the following to say on this topic:
+
+The problem is that with the widespread use of firewalls on the modern Internet,
+many of the packets that traceroute(8) sends out end up being filtered, 
+making it impossible to completely trace the path to the destination. 
+However, in many cases, these firewalls will permit inbound TCP packets to specific 
+ports that hosts sitting behind the firewall are listening for connections on. 
+By sending out TCP SYN packets instead of UDP or ICMP ECHO packets, 
+tcptraceroute is able to bypass the most common firewall filters.
+
+It is worth noting that tcptraceroute never completely establishes a TCP connection 
+with the destination host. If the host is not listening for incoming connections, 
+it will respond with an RST indicating that the port is closed. If the host instead 
+responds with a SYN|ACK, the port is known to be open, and an RST is sent by 
+the kernel tcptraceroute is running on to tear down the connection without completing 
+three-way handshake. This is the same half-open scanning technique that nmap(1) uses 
+when passed the -sS flag.
+
+=item forks
+
+The number of concurrent processes to be run. See probes::basefork(3pm)
+for details.
+
+=head1 AUTHOR
+
+Norman Rasmussen <norman@rasmussen.org>
+Patched for Smokeping 2.x compatibility by Anton Chernev <maznio@doom.bg>
+
+=cut
+
+use strict;
+use base qw(Smokeping::probes::basefork);
+use IPC::Open3;
+use Symbol;
+use Carp;
+
+sub new($$$)
+{
+    my $proto = shift;
+    my $class = ref($proto) || $proto;
+    my $self = $class->SUPER::new(@_);
+
+    # no need for this if we run as a cgi
+    unless ( $ENV{SERVER_SOFTWARE} ) {
+        my $return = `$self->{properties}{binary} -C -x 1 localhost 2>&1`;
+        if ($return =~ m/bytes, ([0-9.]+)\sms\s+.*\n.*\n.*:\s+([0-9.]+)/ and $1 > 0){
+            $self->{pingfactor} = 1000 * $2/$1;
+            print "### tcpping seems to report in ", $1/$2, " milliseconds\n";
+        } else {
+            $self->{pingfactor} = 1000; # Gives us a good-guess default
+            print "### assuming you are using an tcpping copy reporting in milliseconds\n";
+        }
+    };
+
+    return $self;
+}
+
+sub ProbeDesc($){
+    my $self = shift;
+    return "TCP Pings";
+}
+
+sub probevars {
+	my $class = shift;
+	return $class->_makevars($class->SUPER::probevars, {
+		_mandatory => [ 'binary' ],
+		binary => { 
+			_doc => "The location of your TCPPing script.",
+			_example => '/usr/bin/tcpping',
+			_sub => sub { 
+				my $val = shift;
+
+        			return "ERROR: TCPPing 'binary' does not point to an executable"
+            				unless -f $val and -x _;
+
+				my $return = `$val -C -x 1 localhost 2>&1`;
+				return "ERROR: TCPPing must be installed setuid root or it will not work\n"
+					if $return =~ m/only.+root/;
+
+				return undef;
+			},
+		},
+	});
+}
+
+sub targetvars {
+	my $class = shift;
+	return $class->_makevars($class->SUPER::targetvars, {
+		port => {
+			_doc => "The TCP port the probe should measure.",
+			_example => '80',
+			_sub => sub {
+				my $val = shift;
+
+				return "ERROR: TCPPing port must be between 0 and 65535"
+					if $val and ( $val < 0 or $val > 65535 ); 
+
+				return undef;
+			},
+		},
+	});
+}
+
+sub pingone ($){
+    my $self = shift;
+    my $target = shift;
+    # do NOT call superclass ... the ping method MUST be overwriten
+    my $inh = gensym;
+    my $outh = gensym;
+    my $errh = gensym;
+
+    my @times; # Result times
+
+    my @port = () ;
+    push @port, $target->{vars}{port} if $target->{vars}{port};
+
+    my @cmd = (
+                    $self->{properties}{binary},
+                    '-C', '-x', $self->pings($target), 
+                    $target->{addr}, @port);
+    $self->do_debug("Executing @cmd");
+    my $pid = open3($inh,$outh,$errh, @cmd);
+    while (<$outh>){
+        chomp;
+        next unless /^\S+\s+:\s+[\d\.]/; #filter out error messages from tcpping
+        @times = split /\s+/;
+        my $ip = shift @times;
+        next unless ':' eq shift @times; #drop the colon
+
+        @times = map {sprintf "%.10e", $_ / $self->{pingfactor}} sort {$a <=> $b} grep /^\d/, @times;
+    }
+    waitpid $pid,0;
+    close $inh;
+    close $outh;
+    close $errh;
+
+    return @times;
+}
+
+1;