def __init__(self, ism, rtid, pkt):
#OSPF neighbor information
self.state = NSM_STATE['NSM_Down'] # NSM status.
self._inactive_timer = None
self._dd_exstart_timer = None
self.lsr_resend_timer = None
self.dd_flags = 0 # DD bit flags. Slave or master.
self.dd_seqnum = 0 # DD Sequence Number.
#Last sent Database Description packet.
self.last_send = None # just the packet, not tuple
#Timestemp when last Database Description packet was sent
self.last_send_ts = 0 # not used
#Last received Database Description packet.
self.last_recv = tuple() # pattern: (ddseq, init, more, ms)
#LSA data.
self.ls_rxmt = list() # Link state retransmission list
self.db_sum = list() # Database summary list
self.ls_req = list() # Link state request list
self.ism = ism
self.rtid = rtid # neighbor router id
self.nsm = dict()
#Neighbor Information from Hello.
self.src = pkt['H']['SRC']
self.options = pkt['V']['V']['OPTS']
self.priority = pkt['V']['V']['PRIO']
self.d_router = pkt['V']['V']['DESIG']
self.bd_router = pkt['V']['V']['BDESIG']
#inactive timer is equal to dead interval
self.inactive_timer_interval = self.ism.dead_interval
self.ep = ExchangeProtocol(self)
self.fp = FloodProtocol(self)
#register all nsm events
for nsmEvent in NSM_EVENT.keys():
if nsmEvent == 'NSM_PacketReceived':
self.nsm[nsmEvent] = self._hello_received
elif nsmEvent == 'NSM_TwoWayReceived':
self.nsm[nsmEvent] = self._two_way_or_exstart
elif nsmEvent == 'NSM_OneWayReceived':
self.nsm[nsmEvent] = self._init
elif nsmEvent == 'NSM_NegotiationDone':
self.nsm[nsmEvent] = self._exchange
elif nsmEvent == 'NSM_SeqNumberMismatch':
self.nsm[nsmEvent] = self._seq_mismatch_or_bad_lsr
elif nsmEvent == 'NSM_ExchangeDone':
self.nsm[nsmEvent] = self._loading
elif nsmEvent == 'NSM_BadLSReq':
self.nsm[nsmEvent] = self._seq_mismatch_or_bad_lsr
elif nsmEvent == 'NSM_LoadingDone':
self.nsm[nsmEvent] = self._full
else:
continue
