#!/usr/bin/perl
eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
if 0; # not running under some shell
use strict;
use Net::Pcap ':functions';
use Sys::Hostname;
my $has_io_interface = eval "use IO::Interface::Simple ':flags'; 1" || 0;
my(%devs, $err) = ();
my @devs = findalldevs(\%devs, \$err);
my $hostname = hostname();
my $aliases = (gethostbyname($hostname))[1];
print "Host information\n",
"----------------\n",
" Hostname : $hostname\n";
print " Aliases : $aliases\n" if $aliases;
print " Pcap version : ", lib_version(), $/,
$/,
"Devices information\n",
"-------------------\n";
for my $dev (@devs) {
my $default = $dev eq lookupdev(\$err) ? "(default)" : '';
print "Device $dev $default\n",
" Description : $devs{$dev}\n";
print " Link type : ", linktype($dev), $/
if $dev ne "any";
if ($has_io_interface) {
my $iface = IO::Interface::Simple->new($dev);
if (defined $iface) {
print " Hardware address : ", $iface->hwaddr, $/ if $iface->hwaddr;
print " Network address : ", $iface->address, $/ if $iface->address;
print " Network mask : ", $iface->netmask, $/ if $iface->netmask;
print " Flags : ", flags($iface), $/;
}
}
print $/;
}
sub linktype {
my ($dev) = @_;
my $linktype = "<can't get this information>";
my $status = "";
if (my $pcap = open_live($dev, 1024, 1, 0, \$err)) {
$linktype = datalink_val_to_description(datalink($pcap));
pcap_close($pcap);
}
if (-e "/sbin/mii-tool") {
chomp($status = `/sbin/mii-tool $dev 2>/dev/null`);
$status =~ s/$dev\:/,/;
}
return $linktype . $status
}
sub flags {
my ($iface) = @_;
my $string = '';
$string .= "up " if $iface->flags & &IO::Interface::IFF_UP;
$string .= "running " if $iface->is_running;
$string .= "broadcast " if $iface->is_broadcast;
$string .= "debug " if $iface->flags & &IO::Interface::IFF_DEBUG;
$string .= "loopback " if $iface->is_loopback;
$string .= "p-to-p " if $iface->is_pt2pt;
$string .= "notrailers " if $iface->is_notrailers;
$string .= "noarp " if $iface->is_noarp;
$string .= "promiscuous " if $iface->is_promiscuous;
$string .= "multicast " if $iface->is_multicast;
$string .= "allmulti " if $iface->flags & eval { &IO::Interface::IFF_ALLMULTI };
$string .= "master " if $iface->flags & eval { &IO::Interface::IFF_MASTER };
$string .= "slave " if $iface->flags & eval { &IO::Interface::IFF_SLAVE };
$string .= "portsel " if $iface->flags & eval { &IO::Interface::IFF_PORTSEL };
$string .= "automedia " if $iface->flags & eval { &IO::Interface::IFF_AUTOMEDIA };
return $string
}
__END__
=head1 NAME
pcapinfo - Prints detailed information about the network devices
=head1 SYNOPSIS
pcapinfo
=head1 OPTIONS
None.
=head1 DESCRIPTION
B<pcapinfo> prints detailed information about the network devices
and Pcap library available on the current host. Here is an example:
Host information
----------------
Hostname : fangorn.maddingue.net
Aliases : fangorn.local fangorn
Pcap version : libpcap version 0.8.3
Devices information
-------------------
Device eth0 (default)
Description : No description available
Link type : Ethernet, no autonegotiation, 10baseT-HD, link ok
Hardware address : 00:0c:6e:0a:c3:ca
Network address : 10.0.1.51
Network mask : 255.255.255.0
Flags : up running broadcast multicast
Device eth1
Description : No description available
Link type : Ethernet, no autonegotiation, 10baseT-HD, link ok
Hardware address : 00:26:54:0a:d8:4d
Network address : 192.168.1.51
Network mask : 255.255.255.0
Flags : up running broadcast multicast
The device marked as C<"(default)"> is the one returned when calling
C<Net::Pcap::lookupdev()>
Some information like the link type can only be gathered with administrative
privileges.
=head1 AUTHOR
SE<eacute>bastien Aperghis-Tramoni, E<lt>sebastien@aperghis.netE<gt>
=head1 COPYRIGHT
Copyright (C) 2005, 2006, 2007, 2008, 2009 SE<eacute>bastien Aperghis-Tramoni.
All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
Mini Shell