def send(self,
sensor_data,
ack_num=0,
timestamp=int(time.time()),
ident=None,
snum=None,
dstip=None,
dstport=None):
if ident == None:
ident = self.Ident
if snum == None:
snum = self.SNum
if dstip == None:
dstip = self.MCGroup
if dstport == None:
dstport = self.MCDstPort
else:
if version not in list(hdr_fmt.keys()):
raise ValueError("Incorrect protocol version")
try:
print("Header:")
print(self.Version)
print(ident)
print(snum)
print(ack_num)
print(timestamp)
print(list(pld_fmt.keys()))
msg = super(IPMcastWorker, self)._dgram_pack(self.Version, ident, snum, \
ack_num, timestamp)
print(msg)
if ack_num != 0:
self.msg_queue[snum] = msg
sent_size = self.working_socket.sendto(msg, (dstip, dstport))
self.SNum += self.SNumDelta
return sent_size
except socket.error:
del msg
return err['ErrSocketError']
except socket.timeout:
del msg
return err['ErrSocketTimeout']
except struct.error:
del msg
return err['ErrPacketFormat']
def __basic_init(self,Ident=1,Version=1,
MaxMsgSize=opts['MaxMsgSize']):
self.SNum = int((time.time() - int(time.time())) * time.time()) >> 16
self.SNumDelta = int((time.time() - int(time.time())) * time.time()) >> 20
self.MaxMsgSize = MaxMsgSize
if Version not in (list(hdr_fmt.keys())):
raise ValueError("Invalid protocol version")
else:
self.Version = Version
if Ident not in range (1,65536):
raise ValueError("Invalid ident")
else:
self.Ident = Ident
def _dgram_pack(self,
sensor_data,
ack_required=False,
version=None,
ident=None,
snum=None,
ack_num=0,
timestamp=int(time.time())):
if version == None:
version = self.Version
elif (version not in list(hdr_fmt.keys())):
raise ValueError("Incorrect version field value")
else:
pass
if ident == None:
ident = self.Ident
else:
try:
ident = int(ident)
except Exception:
raise ValueError("Incorrect ident field value")
if snum == None:
snum = self.SNum
else:
try:
snum = int(snum)
except Exception:
raise ValueError("Incorrect serial number field value")
send_buf = bytearray()
try:
send_buf.extend(struct.pack(hdr_fmt[self.Version],
version,
ident,
snum,
ack_num,
timestamp)
)
for data in sensor_data:
send_buf.extend(struct.pack(pld_fmt[self.Version],
data['sensor_id'],
data['sensor_value']
)
)
return send_buf
except struct.error:
del send_buf
return err['ErrPacketFormat']
except KeyError:
del send_buf
return err['ErrPacketFormat']
