def _getNextDHCPPacket(self, timeout=60, packet_buffer=2048):
"""
Blocks for up to ``timeout`` seconds while waiting for a packet to
arrive; if one does, a thread is spawned to process it.
Have a thread blocking on this at all times; restart it immediately after it returns.
:param int timeout: The number of seconds to wait before returning.
:param int packet_buffer: The size of the buffer to use for receiving packets.
:return tuple(2):
0. ``bool``: ``True`` if a DHCP packet was received.
1. :class:`Address <dhcp.Address>` or ``None``: None if the timeout was reached.
"""
(source_address, data, pxe) = self._network_link.getData(timeout=timeout, packet_buffer=packet_buffer)
if data:
try:
packet = DHCPPacket(data=data)
except ValueError:
pass
else:
if packet.isDHCPRequestPacket():
threading.Thread(target=self._handleDHCPRequest, args=(packet, source_address, pxe)).start()
elif packet.isDHCPDiscoverPacket():
threading.Thread(target=self._handleDHCPDiscover, args=(packet, source_address, pxe)).start()
elif packet.isDHCPInformPacket():
threading.Thread(target=self._handleDHCPInform, args=(packet, source_address, pxe)).start()
elif packet.isDHCPReleasePacket():
threading.Thread(target=self._handleDHCPRelease, args=(packet, source_address, pxe)).start()
elif packet.isDHCPDeclinePacket():
threading.Thread(target=self._handleDHCPDecline, args=(packet, source_address, pxe)).start()
elif packet.isDHCPLeaseQueryPacket():
threading.Thread(target=self._handleDHCPLeaseQuery, args=(packet, source_address, pxe)).start()
return (True, source_address)
return (False, source_address)
def _getNextDHCPPacket(self, timeout=60, packet_buffer=2048):
"""
Blocks for up to ``timeout`` seconds while waiting for a packet to
arrive; if one does, a thread is spawned to process it.
Have a thread blocking on this at all times; restart it immediately after it returns.
:param int timeout: The number of seconds to wait before returning.
:param int packet_buffer: The size of the buffer to use for receiving packets.
:return tuple(2):
0. ``bool``: ``True`` if a DHCP packet was received.
1. :class:`Address <dhcp.Address>` or ``None``: None if the timeout was reached.
"""
(source_address, data,
pxe) = self._network_link.getData(timeout=timeout,
packet_buffer=packet_buffer)
if data:
try:
packet = DHCPPacket(data=data)
except ValueError:
pass
else:
if packet.isDHCPRequestPacket():
threading.Thread(target=self._handleDHCPRequest,
args=(packet, source_address,
pxe)).start()
elif packet.isDHCPDiscoverPacket():
threading.Thread(target=self._handleDHCPDiscover,
args=(packet, source_address,
pxe)).start()
elif packet.isDHCPInformPacket():
threading.Thread(target=self._handleDHCPInform,
args=(packet, source_address,
pxe)).start()
elif packet.isDHCPReleasePacket():
threading.Thread(target=self._handleDHCPRelease,
args=(packet, source_address,
pxe)).start()
elif packet.isDHCPDeclinePacket():
threading.Thread(target=self._handleDHCPDecline,
args=(packet, source_address,
pxe)).start()
elif packet.isDHCPLeaseQueryPacket():
threading.Thread(target=self._handleDHCPLeaseQuery,
args=(packet, source_address,
pxe)).start()
return (True, source_address)
return (False, source_address)
def _getNextDHCPPacket(self, timeout=60):
"""
Blocks for up to C{timeout} seconds while waiting for a packet to
arrive; if one does, a thread is spawned to process it.
@type timeout: int
@param timeout: The number of seconds to wait before returning.
@rtype: tuple(2)
@return: (received:bool, (address:basestring, port:int)|None), with received
indicating whether a DHCP packet was received or not and the tuple
reflecting the source of the received packet, if any.
"""
active_sockets = None
source_address = None
if self._pxe_socket:
active_sockets = select.select([self._dhcp_socket, self._pxe_socket], [], [], timeout)[0]
else:
active_sockets = select.select([self._dhcp_socket], [], [], timeout)[0]
if active_sockets:
active_socket = active_sockets[0]
(data, source_address) = active_socket.recvfrom(4096)
if data:
packet = DHCPPacket(data)
if packet.isDHCPPacket():
pxe = active_socket == self._pxe_socket
if packet.isDHCPRequestPacket():
threading.Thread(target=self._handleDHCPRequest, args=(packet, source_address, pxe)).start()
elif packet.isDHCPDiscoverPacket():
threading.Thread(target=self._handleDHCPDiscover, args=(packet, source_address, pxe)).start()
elif packet.isDHCPInformPacket():
threading.Thread(target=self._handleDHCPInform, args=(packet, source_address, pxe)).start()
elif packet.isDHCPReleasePacket():
threading.Thread(target=self._handleDHCPRelease, args=(packet, source_address, pxe)).start()
elif packet.isDHCPDeclinePacket():
threading.Thread(target=self._handleDHCPDecline, args=(packet, source_address, pxe)).start()
elif packet.isDHCPLeaseQueryPacket():
threading.Thread(target=self._handleDHCPLeaseQuery, args=(packet, source_address, pxe)).start()
return (True, source_address)
return (False, source_address)