+#
+# Net-Oping - lib/Net/Oping.pm
+# Copyright (C) 2007 Olivier Fredj
+# Copyright (C) 2008,2009 Florian octo Forster
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; only version 2 of the License is
+# applicable.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+# Authors:
+# Olivier Fredj <ofredj at proxad.net>
+# Florian octo Forster <ff at octo.it>
+#
+
package Net::Oping;
=head1 NAME
=head1 SYNOPSIS
- use Net::Oping;
+ use Net::Oping ();
my $obj = Net::Oping->new ();
$obj->host_add (qw(one.example.org two.example.org));
=head1 DESCRIPTION
This Perl module is a high-level interface to the
-L<oping library|http://verplant.org/liboping/>. Its purpose it to send C<ICMP
-ECHO_REQUEST> packets (also known as "ping") to a host and measure the time
-that elapses until the reception of an C<ICMP ECHO_REPLY> packet (also known as
-"pong"). If no such packet is received after a certain timeout the host is considered to be unreachable.
+L<oping library|http://noping.cc/>. Its purpose it to send C<ICMP ECHO_REQUEST>
+packets (also known as "ping") to a host and measure the time that elapses
+until the reception of an C<ICMP ECHO_REPLY> packet (also known as "pong"). If
+no such packet is received after a certain timeout the host is considered to be
+unreachable.
-The used C<oping> library supports "ping"ing multiple hosts in parallel and
+The used I<oping> library supports "ping"ing multiple hosts in parallel and
works with IPv4 and IPv6 transparently. Other advanced features that are
-provided by the underlying library, such as setting the data sent or
-configuring the time of live (TTL) are not yet supported by this interface.
+provided by the underlying library, such as setting the data sent, are not yet
+supported by this interface.
=cut
-use 5.008007;
+use 5.006;
use strict;
use warnings;
use Carp (qw(cluck confess));
-our $VERSION = '1.00';
+our $VERSION = '1.21';
require XSLoader;
-XSLoader::load('Net::Oping', $VERSION);
+XSLoader::load ('Net::Oping', $VERSION);
return (1);
=head1 INTERFACE
The interface is kept simple and clean. First you need to create an object to
which you then add hosts. Using the C<ping> method you can request a latency
-measurement and get the current values returned. If neccessary you can remove
+measurement and get the current values returned. If necessary you can remove
hosts from the object, too.
The constructor and methods are defined as follows:
=over 4
-=item my I<$obj> = Net::Oping-E<gt>B<new> ();
+=item I<$obj> = Net::Oping-E<gt>B<new> ();
Creates and returns a new object.
_ping_destroy ($obj->{'c_obj'});
}
-=item my I<$status> = I<$obj>-E<gt>B<timeout> (I<$timeout>);
+=item I<$status> = I<$obj>-E<gt>B<timeout> (I<$timeout>);
Sets the timeout before a host is considered unreachable to I<$timeout>
seconds, which may be a floating point number to specify fractional seconds.
return (1);
}
-=item my I<$status> = I<$obj>-E<gt>B<bind> (I<$ip_addr>);
+=item I<$status> = I<$obj>-E<gt>B<ttl> (I<$ttl>);
+
+Sets the I<Time to Live> (TTL) of outgoing packets. I<$ttl> must be in the
+range B<1>E<nbsp>...E<nbsp>B<255>. Returns true when successful and false
+when an error occurred.
+
+=cut
+
+sub ttl
+{
+ my $obj = shift;
+ my $ttl = shift;
+ my $status;
+
+ $status = _ping_setopt_ttl ($obj->{'c_obj'}, $ttl);
+ if ($status != 0)
+ {
+ $obj->{'err_msg'} = "" . _ping_get_error ($obj->{'c_obj'});
+ return;
+ }
+
+ return (1);
+}
+
+=item I<$status> = I<$obj>-E<gt>B<bind> (I<$ip_addr>);
Sets the source IP-address to use. I<$ip_addr> must be a string containing an
IP-address, such as "192.168.0.1" or "2001:f00::1". As a side-effect this will
-set the address-family (IPv4 or IPv6) to a fixed, value, too, for obvious
+set the address-family (IPv4 or IPv6) to a fixed value, too, for obvious
reasons.
=cut
return (1);
}
-=item my I<$status> = I<$obj>-E<gt>B<host_add> (I<$host>, [I<$host>, ...]);
+=item I<$status> = I<$obj>-E<gt>B<device> (I<$device>);
+
+Sets the network device used for communication. This may not be supported on
+all platforms.
+
+I<Requires liboping 1.3 or later.>
+
+=cut
+
+sub device
+{
+ my $obj = shift;
+ my $device = shift;
+ my $status;
+
+ $status = _ping_setopt_device ($obj->{'c_obj'}, $device);
+ if ($status == -95) # Feature not supported.
+ {
+ $obj->{'err_msg'} = "Feature not supported by your version of liboping.";
+ }
+ elsif ($status != 0)
+ {
+ $obj->{'err_msg'} = "" . _ping_get_error ($obj->{'c_obj'});
+ return;
+ }
+
+ return (1);
+}
+
+=item I<$status> = I<$obj>-E<gt>B<host_add> (I<$host>, [I<$host>, ...]);
Adds one or more hosts to the Net::Oping-object I<$obj>. The number of
successfully added hosts is returned. If this number differs from the number of
return ($i);
}
-=item my I<$status> = I<$obj>-E<gt>B<host_remove> (I<$host>, [I<$host>, ...]);
+=item I<$status> = I<$obj>-E<gt>B<host_remove> (I<$host>, [I<$host>, ...]);
Same semantic as B<host_add> but removes hosts.
return ($i);
}
-=item
my I<$latency> = I<$obj>-E<gt>B<ping> ()
+=item I<$latency> = I<$obj>-E<gt>B<ping> ()
The central method of this module sends ICMP packets to the hosts and waits for
replies. The time it takes for replies to arrive is measured and returned.
$status = _ping_send ($obj->{'c_obj'});
if ($status < 0)
{
- print "\$status = $status;\n";
$obj->{'err_msg'} = "" . _ping_get_error ($obj->{'c_obj'});
return;
}
$iter = _ping_iterator_get ($obj->{'c_obj'});
+ if (!$iter)
+ {
+ $obj->{'err_msg'} = "" . _ping_get_error ($obj->{'c_obj'});
+ return;
+ }
+
while ($iter)
{
my $host = _ping_iterator_get_hostname ($iter);
}
return ($data);
-}
+} # ping
+
+=item I<$dropped> = I<$obj>-E<gt>B<get_dropped> ()
-=item my I<$errmsg> = I<$obj>-E<gt>B<get_error> ();
+Returns a hash reference holding the number of "drops" (echo requests which
+were not answered in time) for each host. An example return
+values would be:
-Returns the last error that occured.
+ $droprate = { host1 => 0, host2 => 3, host3 => undef, ... };
+
+Hosts to which no data has been sent yet will return C<undef> ("host3" in thie
+example).
+
+=cut
+
+sub get_dropped
+{
+ my $obj = shift;
+ my $iter;
+ my $data = {};
+
+ $iter = _ping_iterator_get ($obj->{'c_obj'});
+ if (!$iter)
+ {
+ $obj->{'err_msg'} = "" . _ping_get_error ($obj->{'c_obj'});
+ return;
+ }
+
+ while ($iter)
+ {
+ my $host = _ping_iterator_get_hostname ($iter);
+ if (!$host)
+ {
+ $iter = _ping_iterator_next ($iter);
+ next;
+ }
+
+ my $dropped = _ping_iterator_get_dropped ($iter);
+ if ($dropped < 0)
+ {
+ $dropped = undef;
+ }
+
+ $data->{$host} = $dropped;
+
+ $iter = _ping_iterator_next ($iter);
+ }
+
+ return ($data);
+} # get_dropped
+
+=item I<$ttl> = I<$obj>-E<gt>B<get_recv_ttl> ()
+
+Returns a hash reference holding the I<Time to Live> (TTL) of the last received
+packet for each host. An example return value would be:
+
+ $ttl = { host1 => 60, host2 => 41, host3 => 243, ... };
+
+To signal an invalid or unavailable TTL, a negative number is returned.
+
+=cut
+
+sub get_recv_ttl
+{
+ my $obj = shift;
+ my $iter;
+ my $data = {};
+
+ $iter = _ping_iterator_get ($obj->{'c_obj'});
+ if (!$iter)
+ {
+ $obj->{'err_msg'} = "" . _ping_get_error ($obj->{'c_obj'});
+ return;
+ }
+
+ while ($iter)
+ {
+ my $host = _ping_iterator_get_hostname ($iter);
+ if ($host)
+ {
+ $data->{$host} = _ping_iterator_get_recv_ttl ($iter);
+ }
+
+ $iter = _ping_iterator_next ($iter);
+ }
+
+ return ($data);
+} # get_recv_ttl
+
+=item I<$errmsg> = I<$obj>-E<gt>B<get_error> ();
+
+Returns the last error that occurred.
=cut
=back
+=head1 CAVEATS
+
+The I<oping> library opens a raw socket to be able to send ICMP packets. On
+most systems normal users are not allowed to do this. This is why on most
+systems the L<ping(1)> utility is installed as SetUID-root. Since, when using
+this module, no external process is spawned B<this> process needs the
+appropriate permissions. This means that either your script has to run as
+superuser or, under Linux, needs the C<CAP_NET_RAW> capability.
+
=head1 SEE ALSO
L<liboping(3)>
-The C<liboping> homepage may be found at L<http://verplant.org/liboping/>.
+The I<liboping> homepage may be found at L<http://noping.cc/>.
Information about its mailing list may be found at
L<http://mailman.verplant.org/listinfo/liboping>.
-=head1 AUTHOR
+=head1 AUTHORS
First XSE<nbsp>port by Olivier Fredj, extended XS functionality and high-level
Perl interface by Florian Forster.
Copyright (C) 2007 by Olivier Fredj E<lt>ofredjE<nbsp>atE<nbsp>proxad.netE<gt>
-Copyright (C) 2008 by Florian Forster
-E<lt>octoE<nbsp>atE<nbsp>verplant.orgE<gt>
+Copyright (C) 2008,2009 by Florian Forster E<lt>ffE<nbsp>atE<nbsp>octo.itE<gt>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.8.7 or,
at your option, any later version of Perl 5 you may have available.
+Please note that I<liboping> is licensed under the GPLv2. Derived works of
+both, I<Net::Oping> and I<liboping>, (i.E<nbsp>e. binary packages) may
+therefore be subject to stricter licensing terms than the source code of this
+package.
+
=cut
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