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package probes::base;
=head1 NAME
probes::base - Base Class for implementing SmokePing Probes
=head1 OVERVIEW
For the time being, please use the probes::FPing for
inspiration when implementing your own probes.
=head1 AUTHOR
Tobias Oetiker <tobi@oetiker.ch>
=cut
use vars qw($VERSION);
use Carp;
use lib qw(..);
use Smokeping;
$VERSION = 1.0;
use strict;
sub new($$)
{
my $this = shift;
my $class = ref($this) || $this;
my $self = { properties => shift, cfg => shift,
name => shift,
targets => {}, rtts => {}, addrlookup => {}};
bless $self, $class;
return $self;
}
sub add($$)
{
my $self = shift;
my $tree = shift;
$self->{targets}{$tree} = shift;
}
sub ping($)
{
croak "this must be overridden by the subclass";
}
sub round ($) {
return sprintf "%.0f", $_[0];
}
sub ProbeDesc ($) {
return "Probe which does not overrivd the ProbeDesc methode";
}
sub rrdupdate_string($$)
{ my $self = shift;
my $tree = shift;
# print "$tree -> ", join ",", @{$self->{rtts}{$tree}};print "\n";
# skip invalid addresses
my $pings = $self->_pings($tree);
return "U:${pings}:".(join ":", map {"U"} 1..($pings+1))
unless defined $self->{rtts}{$tree} and @{$self->{rtts}{$tree}} > 0;
my $entries = scalar @{$self->{rtts}{$tree}};
my @times = @{$self->{rtts}{$tree}};
my $loss = $pings - $entries;
my $median = $times[int($entries/2)] || 'U';
# shift the data into the middle of the times array
my $lowerloss = int($loss/2);
my $upperloss = $loss - $lowerloss;
@times = ((map {'U'} 1..$lowerloss),@times, (map {'U'} 1..$upperloss));
my $age;
if ( -f $self->{targets}{$tree}.".adr" ) {
$age = time - (stat($self->{targets}{$tree}.".adr"))[9];
} else {
$age = 'U';
}
if ( $entries == 0 ){
$age = 'U';
$loss = 'U';
if ( -f $self->{targets}{$tree}.".adr"
and not -f $self->{targets}{$tree}.".snmp" ){
unlink $self->{targets}{$tree}.".adr";
}
} ;
return "${age}:${loss}:${median}:".(join ":", @times);
}
sub addresses($)
{
my $self = shift;
my $addresses = [];
$self->{addrlookup} = {};
foreach my $tree (keys %{$self->{targets}}){
my $target = $self->{targets}{$tree};
if ($target =~ m|/|) {
if ( open D, "<$target.adr" ) {
my $ip;
chomp($ip = <D>);
close D;
if ( open D, "<$target.snmp" ) {
my $snmp = <D>;
chomp($snmp);
if ($snmp ne Smokeping::snmpget_ident $ip) {
# something fishy snmp properties do not match, skip this address
next;
}
close D;
}
$target = $ip;
} else {
# can't read address file skip
next;
}
}
$self->{addrlookup}{$target} = ()
unless defined $self->{addrlookup}{$target};
push @{$self->{addrlookup}{$target}}, $tree;
push @{$addresses}, $target;
};
return $addresses;
}
sub debug {
my $self = shift;
my $newval = shift;
$self->{debug} = $newval if defined $newval;
return $self->{debug};
}
sub do_debug {
my $self = shift;
return unless $self->debug;
$self->do_log(@_);
}
sub do_fatal {
my $self = shift;
$self->do_log("Fatal:", @_);
croak(@_);
}
sub do_log {
my $self = shift;
Smokeping::do_log("$self->{name}:", @_);
}
sub report {
my $self = shift;
my $count = $self->target_count;
my $offset = $self->offset_in_seconds;
my $step = $self->step;
$self->do_log("probing $count targets with step $step s and offset $offset s.");
}
sub step {
my $self = shift;
my $rv = $self->{cfg}{Database}{step};
unless (defined $self->{cfg}{General}{concurrentprobes}
and $self->{cfg}{General}{concurrentprobes} eq 'no') {
$rv = $self->{properties}{step} if defined $self->{properties}{step};
}
return $rv;
}
sub offset {
my $self = shift;
my $rv = $self->{cfg}{General}{offset};
unless (defined $self->{cfg}{General}{concurrentprobes}
and $self->{cfg}{General}{concurrentprobes} eq 'no') {
$rv = $self->{properties}{offset} if defined $self->{properties}{offset};
}
return $rv;
}
sub offset_in_seconds {
# returns the offset in seconds rather than as a percentage
# this is filled in from the initialization in Smokeping::main
my $self = shift;
my $newval = shift;
$self->{offset_in_seconds} = $newval if defined $newval;
return $self->{offset_in_seconds};
}
# the "public" method that takes a "target" argument is used by the probes
# the "private" method that takes a "tree" argument is used by Smokeping.pm
# there's no difference between them here, but we have to provide both
sub pings {
my $self = shift;
my $target = shift;
# $target is not used; basefork.pm overrides this method to provide a target-specific parameter
my $rv = $self->{cfg}{Database}{pings};
$rv = $self->{properties}{pings} if defined $self->{properties}{pings};
return $rv;
}
sub _pings {
my $self = shift;
my $tree = shift;
# $tree is not used; basefork.pm overrides this method to provide a target-specific parameter
my $rv = $self->{cfg}{Database}{pings};
$rv = $self->{properties}{pings} if defined $self->{properties}{pings};
return $rv;
}
sub target_count {
my $self = shift;
return scalar keys %{$self->{targets}};
}
1;
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