def _request(self, request_id, client_request):
dhcp = self._ongoing.get(request_id, None)
if (not dhcp):
dhcp = ServerResponse(client_request.intf, server=self)
result = dhcp.ack(client_request)
# not responding per rfc 2131
if (result == DHCP.DROP):
self._ongoing.pop(request_id, None)
response_mtype, record = None, None
# sending NAK per rfc 2131
elif (result == DHCP.NAK):
client_request.handout_ip = INADDR_ANY
response_mtype, record = DHCP.NAK, None
# responding with ACK
elif (result):
client_request.handout_ip = result
response_mtype = DHCP.ACK
record = (DHCP.LEASED, fast_time(), client_request.mac)
# protecting return on invalid dhcp types | NOTE: validate if this even does anything. :)
else:
response_mtype, record = None, None
return response_mtype, record
def _discover(self, request_id, client_request):
dhcp = ServerResponse(client_request.sock.name, server=self)
self._ongoing[request_id] = dhcp
client_request.handout_ip = dhcp.offer(client_request)
return DHCP.OFFER, (DHCP.OFFERED, fast_time(), client_request.mac)
def _request(self, request_id, client_request):
dhcp = self._ongoing.get(request_id, None)
if (not dhcp):
dhcp = ServerResponse(client_request.sock.name, server=self)
request_mtype, handout_ip = dhcp.ack(client_request)
# not responding per rfc 2131
if (request_mtype is DHCP.DROP):
record = None
# sending NAK per rfc 2131
elif (request_mtype is DHCP.NAK):
client_request.handout_ip = INADDR_ANY
record = None
# responding with ACK
elif (request_mtype in [DHCP.ACK, DHCP.RENEWING, DHCP.REBINDING]):
client_request.handout_ip = handout_ip
record = (DHCP.LEASED, fast_time(), client_request.mac)
# protecting return on invalid dhcp types | TODO: validate if this even does anything. :)
else:
record = None
# removing the request from ongoing since we are sending the final message and do
# not need any objects from the request instance anymore.
self._ongoing.pop(request_id, None)
return request_mtype, record
def _release(self, ip_address, mac_address):
dhcp = ServerResponse(server=self)
# if mac/ lease mac match, the lease will be removed from the table
if dhcp.release(ip_address, mac_address):
self.leases.modify(ip_address) # pylint: disable=no-member
else:
Log.warning(f'Client {mac_address} attempted invalid release.')
def _release(self, ip_address, mac_address):
dhcp = ServerResponse(server=self)
# if mac/ lease mac match, the lease will be removed from the table
if dhcp.release(ip_address, mac_address):
self.leases.modify(ip_address, None) # pylint: disable=no-member