perl Выбор интерфейса IO::Socket

#!/usr/bin/perl
# Simple DHCP client - sending a broadcasted DHCP Discover request

use IO::Socket::INET;
use Net::DHCP::Packet;
use Net::DHCP::Constants;

# create DHCP Packet
$discover = Net::DHCP::Packet->new(
                      xid => int(rand(0xFFFFFFFF)), # random xid
                      Flags => 0x8000,              # ask for broadcast answer
                      DHO_DHCP_MESSAGE_TYPE() => DHCPDISCOVER(),
                      DHO_VENDOR_CLASS_IDENTIFIER() => 'foo',
                      );

# send packet
$handle = IO::Socket::INET->new(Proto => 'udp',
                                Broadcast => 1,
                                PeerPort => '67',
                                LocalPort => '68',
                                PeerAddr => '255.255.255.255')
              or die "socket: $@";     # yes, it uses $@ here
$handle->send($discover->serialize())
              or die "Error sending broadcast inform:$!\n";