package Smokeping::probes::FPing; =head1 301 Moved Permanently This is a Smokeping probe module. Please use the command C to view the documentation or the command C to generate the POD document. =cut use strict; use base qw(Smokeping::probes::base); use IPC::Open3; use Symbol; use Carp; sub pod_hash { return { name => < < must point to your copy of the FPing program. If it is not installed on your system yet, you can get a slightly enhanced version from L. The (optional) B option lets you configure the packetsize for the pings sent. In B, FPing sends one more ping than requested, and discards the first RTT value returned as it's likely to be an outlier. The FPing manpage has the following to say on this topic: Number of bytes of ping data to send. The minimum size (normally 12) allows room for the data that fping needs to do its work (sequence number, timestamp). The reported received data size includes the IP header (normally 20 bytes) and ICMP header (8 bytes), so the minimum total size is 40 bytes. Default is 56, as in ping. Maximum is the theoretical maximum IP datagram size (64K), though most systems limit this to a smaller, system-dependent number. DOC authors => <<'DOC', Tobias Oetiker DOC } } 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 $binary = join(" ", $self->binary); my $testhost = $self->testhost; my $return = `$binary -C 1 $testhost 2>&1`; $self->{enable}{S} = (`$binary -h 2>&1` =~ /\s-S\s/); $self->{enable}{O} = (`$binary -h 2>&1` =~ /\s-O\s/); croak "ERROR: fping ('$binary -C 1 $testhost') could not be run: $return" if $return =~ m/not found/; croak "ERROR: FPing must be installed setuid root or it will not work\n" if $return =~ m/only.+root/; if ($return =~ m/bytes, ([0-9.]+)\sms\s+.*\n.*\n.*:\s+([0-9.]+)/ and $1 > 0){ $self->{pingfactor} = 1000 * $2/$1; if ($1 != $2){ warn "### fping seems to report in ", $2/$1, " milliseconds (old version?)"; } } else { $self->{pingfactor} = 1000; # Gives us a good-guess default warn "### assuming you are using an fping copy reporting in milliseconds\n"; } }; return $self; } sub ProbeDesc($){ my $self = shift; my $bytes = $self->{properties}{packetsize}||56; return "ICMP Echo Pings ($bytes Bytes)"; } # derived class (ie. RemoteFPing) can override this sub binary { my $self = shift; return $self->{properties}{binary}; } # derived class (ie. FPing6) can override this sub testhost { return "localhost"; } sub ping ($){ my $self = shift; # do NOT call superclass ... the ping method MUST be overwriten # increment the internal 'rounds' counter $self->increment_rounds_count; my %upd; my $inh = gensym; my $outh = gensym; my $errh = gensym; # pinging nothing is pointless return unless @{$self->addresses}; my @params = () ; push @params, "-b$self->{properties}{packetsize}" if $self->{properties}{packetsize}; push @params, "-t" . int(1000 * $self->{properties}{timeout}) if $self->{properties}{timeout}; push @params, "-i" . int(1000 * $self->{properties}{mininterval}); push @params, "-p" . int(1000 * $self->{properties}{hostinterval}) if $self->{properties}{hostinterval}; if ($self->rounds_count == 1 and $self->{properties}{sourceaddress} and not $self->{enable}{S}){ $self->do_log("WARNING: your fping binary doesn't support source address setting (-S), I will ignore any sourceaddress configurations - see http://bugs.debian.org/198486."); } push @params, "-S$self->{properties}{sourceaddress}" if $self->{properties}{sourceaddress} and $self->{enable}{S}; if ($self->rounds_count == 1 and $self->{properties}{tos} and not $self->{enable}{O}){ $self->do_log("WARNING: your fping binary doesn't support type of service setting (-O), I will ignore any tos configurations."); } push @params, "-O$self->{properties}{tos}" if $self->{properties}{tos} and $self->{enable}{O}; my $pings = $self->pings; if (($self->{properties}{blazemode} || '') eq 'true'){ $pings++; } my @cmd = ( $self->binary, '-C', $pings, '-q','-B1','-r1', @params, @{$self->addresses}); $self->do_debug("Executing @cmd"); my $pid = open3($inh,$outh,$errh, @cmd); $self->{rtts}={}; while (<$errh>){ chomp; $self->do_debug("Got fping output: '$_'"); next unless /^\S+\s+:\s+[-\d\.]/; #filter out error messages from fping my @times = split /\s+/; my $ip = shift @times; next unless ':' eq shift @times; #drop the colon if (($self->{properties}{blazemode} || '') eq 'true'){ shift @times; } @times = map {sprintf "%.10e", $_ / $self->{pingfactor}} sort {$a <=> $b} grep /^\d/, @times; map { $self->{rtts}{$_} = [@times] } @{$self->{addrlookup}{$ip}} ; } waitpid $pid,0; close $inh; close $outh; close $errh; } sub probevars { my $class = shift; return $class->_makevars($class->SUPER::probevars, { _mandatory => [ 'binary' ], binary => { _sub => sub { my ($val) = @_; return undef if $ENV{SERVER_SOFTWARE}; # don't check for fping presence in cgi mode return "ERROR: FPing 'binary' does not point to an executable" unless -f $val and -x _; return undef; }, _doc => "The location of your fping binary.", _example => '/usr/bin/fping', }, packetsize => { _re => '\d+', _example => 5000, _sub => sub { my ($val) = @_; return "ERROR: FPing packetsize must be between 12 and 64000" if ( $val < 12 or $val > 64000 ); return undef; }, _doc => "The ping packet size (in the range of 12-64000 bytes).", }, blazemode => { _re => '(true|false)', _example => 'true', _doc => "Send an extra ping and then discarge the first answer since the first is bound to be an outliner.", }, timeout => { _re => '(\d*\.)?\d+', _example => 1.5, _doc => < { _re => '(\d*\.)?\d+', _example => 1.5, _doc => < { _re => '(\d*\.)?\d+', _example => .001, _default => .01, _doc => < { _re => '\d+(\.\d+){3}', _example => '192.168.0.1', _doc => < { _re => '\d+|0x[0-9a-zA-Z]+', _example => '0x20', _doc => <