Created
September 27, 2016 12:19
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use strict; | |
use IO::Socket; | |
use Net::DHCP::Packet; | |
use Net::DHCP::Constants; | |
my $server_ip = "10.10.10.1"; | |
my $client_ip = "10.10.10.10"; | |
my $subnet_mask = "255.255.255.0"; | |
my $socket_in = IO::Socket::INET->new( | |
LocalPort => 67, | |
LocalAddr => "255.255.255.255", | |
Proto => 'udp') or die $@; | |
while(1) { | |
my $buf; | |
$socket_in->recv($buf,4096); | |
my $packet = new Net::DHCP::Packet($buf); | |
my $messagetype = $packet->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); | |
if ($messagetype eq DHCPDISCOVER()) { | |
send_offer($packet); | |
} elsif ($messagetype eq DHCPREQUEST()) { | |
send_ack($packet); | |
} | |
} | |
sub send_offer { | |
my($request)=@_; | |
my $socket_out = IO::Socket::INET->new( | |
PeerPort => 68, | |
PeerAddr => "255.255.255.255", | |
LocalAddr => "$server_ip:67", | |
Broadcast => 1, | |
Proto => 'udp') or die $@; | |
my $offer = new Net::DHCP::Packet( | |
Op => BOOTREPLY(), | |
Xid => $request->xid(), | |
Flags => $request->flags(), | |
Ciaddr => $request->ciaddr(), | |
Yiaddr => $client_ip, | |
Siaddr => $server_ip, | |
Giaddr => $request->giaddr(), | |
Chaddr => $request->chaddr(), | |
DHO_DHCP_MESSAGE_TYPE() => DHCPOFFER(), | |
); | |
$offer->addOptionValue(DHO_SUBNET_MASK(), $subnet_mask); | |
$offer->addOptionValue(DHO_NAME_SERVERS, $server_ip); | |
$socket_out->send($offer->serialize()) or die $!; | |
print STDERR "sent offer\n"; | |
} | |
sub send_ack { | |
print STDERR "send ack\n"; | |
} |
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