def to_layer_three(AorB, pkt):
if random.uniform(0, 1) < sim.lossprob:
return
packet = copy.deepcopy(pkt)
if random.uniform(0, 1) < sim.corruptprob:
if packet.payload != 0:
packet.payload.data = packet.payload.data[0:-1] + "*"
else:
packet.seqnum = -1
q = sim.envlist.head
lasttime = sim.time
while q != None:
if q.eventity == AorB and q.evtype == "FROM_LAYER3":
lasttime = q.evtime
q = q.next
eventime = lasttime + 1 + 9 * random.uniform(0, 1)
if AorB == "A":
sim.envlist.insert(event(eventime, "FROM_LAYER3", "B", packet))
else:
sim.envlist.insert(event(eventime, "FROM_LAYER3", "A", packet))
def generate_next_arrival(self):
time = self.time + self.Lambda
self.envlist.insert(event(time, "FROM_LAYER5", "A"))
return