def pingFace(srcFace, dstPrefix, iterNumber):
print("Will ping from", srcFace, dstPrefix, "iterNumber:", iterNumber)
face = faces[srcFace]
name = Name(dstPrefix)
name.append(Name(srcFace))
name.appendSequenceNumber(iterNumber)
#print("name:", name)
interest = Interest(name)
face.expressInterest(interest, onData, onTimeout, onNack)
async def face_event(self):
last_seq = -1
retry_time = 3000
retry_count_limit = 60000 // retry_time
retry_count = 0
while self.running and self.face:
name = Name("/localhost/nfd/faces/events")
face_interest = Interest()
if last_seq >= 0:
name.appendSequenceNumber(last_seq + 1)
face_interest.canBePrefix = False
else:
face_interest.mustBeFresh = True
face_interest.canBePrefix = True
logging.info("Face event notification stream %s", name.toUri())
face_interest.name = name
# face_interest.interestLifetimeMilliseconds = 60000
face_interest.interestLifetimeMilliseconds = retry_time
ret = await fetch_data_packet(self.face, face_interest)
timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
if isinstance(ret, Data):
retry_count = 0
last_seq = ret.name[-1].toSequenceNumber()
face_event = FaceEventNotificationMessage()
try:
ProtobufTlv.decode(face_event, ret.content)
dic = self.face_event_to_dict(face_event.face_event_notification)
dic['seq'] = str(last_seq)
dic['time'] = timestamp
self.emit('face event', dic)
self.event_list.append(dic)
except RuntimeError as exc:
logging.fatal('Decode failed %s', exc)
last_seq = -1
elif ret is None:
if retry_count >= retry_count_limit:
logging.info("No response: face event")
last_seq = -1
retry_count = 0
else:
retry_count += 1
else:
logging.info("NFD is not running: start reconnection")
self.start_reconnection()
return
await asyncio.sleep(0.1)
