def read_packet(self):
if self.socket != None:
while self.socket.bytesAvailable() > 0 :
if self.incoming_packet == None:
self.incoming_packet = packets.create_packet(self.socket.peek(1))
if self.socket.bytesAvailable() >= self.incoming_packet.MAX_SIZE:
buf = self.socket.read(self.incoming_packet.MAX_SIZE)
packet = self.incoming_packet
self.incoming_packet = None
packet.deserialize(buf)
packet.dispatch(self)
packet.dispatch(self.robot_layer)
packet.dispatch(self.graph_routing_layer)
def read_packet(self):
while True:
if self.packet is None:
try:
b = self.bytes_available()
if b == 0:
return
received_data = self.recv(1)
if len(received_data) == 0:
return
self.buffer += received_data
try:
self.packet = packets.create_packet(self.buffer)
except packets.PacketNotFoundException as e:
logger.error("Packet not found (type={})".format(
e.packet_type))
logger.error("Last good packet : {} size={}".format(
self.last_good_packet,
self.last_good_packet.get_size()))
except socket.error as err:
if err.errno in [errno.EAGAIN, errno.EINTR]:
return
logger.log_exception(err)
return
else:
try:
packet_size = self.packet.get_size()
try:
if self.bytes_available() < packet_size - 1:
return
received_data = self.recv(packet_size -
len(self.buffer))
if len(received_data) == 0:
return
self.buffer += received_data
except socket.error as err:
if err.errno in [errno.EAGAIN, errno.EINTR]:
return
logger.log_exception(err)
return
if len(self.buffer) == packet_size:
# A complete packet has been received, notify the state machine
self.packet.deserialize(self.buffer)
self.last_good_packet = self.packet
self.event_loop.process(self, self.packet)
self.buffer = bytes()
self.packet = None
except Exception as e:
self.packet = None
self.buffer = bytes()
logger.log_exception(e)
def handle_read(self):
if not self.synchronized:
while self.bytes_available():
data = self.recv(1)
(packet_type,) = struct.unpack("<B", data)
if packet_type in [ packets.TurretDetect.TYPE,
packets.TurretInit.TYPE,
packets.TurretDistances.TYPE,
packets.TurretBoot.TYPE ]:
self.synchronized = True
self.buffer = data
self.packet = packets.create_packet(self.buffer)
break
try:
self.read_packet()
except Exception as e:
logger.log("Turret channel is desynchronized. Resynchronizing. Unknown packet type: {}".format(e.args[0]))
self.synchronized = False
def read_packet(self):
while True:
if self.packet is None:
try:
b = self.bytes_available()
if b == 0:
return
received_data = self.recv(1)
if len(received_data) == 0:
return
self.buffer += received_data
self.packet = packets.create_packet(self.buffer)
except socket.error as err:
if err.errno in [errno.EAGAIN, errno.EINTR]:
return
logger.log_exception(err)
return
else:
try:
try:
if self.bytes_available() < self.packet.MAX_SIZE - 1:
return
received_data = self.recv(self.packet.MAX_SIZE -
len(self.buffer))
if len(received_data) == 0:
return
self.buffer += received_data
except socket.error as err:
if err.errno in [errno.EAGAIN, errno.EINTR]:
return
logger.log_exception(err)
return
if len(self.buffer) == self.packet.MAX_SIZE:
# A complete packet has been received, notify the state machine
self.packet.deserialize(self.buffer)
self.event_loop.process(self, self.packet)
self.buffer = bytes()
self.packet = None
except Exception as e:
self.packet = None
self.buffer = bytes()
logger.log_exception(e)
def handle_read(self):
if not self.synchronized:
while self.bytes_available():
data = self.recv(1)
(packet_type, ) = struct.unpack("<B", data)
if packet_type in [
packets.TurretDetect.TYPE, packets.TurretInit.TYPE,
packets.TurretDistances.TYPE, packets.TurretBoot.TYPE
]:
self.synchronized = True
self.buffer = data
self.packet = packets.create_packet(self.buffer)
break
try:
self.read_packet()
except Exception as e:
logger.log(
"Turret channel is desynchronized. Resynchronizing. Unknown packet type: {}"
.format(e.args[0]))
self.synchronized = False
def read_packet(self):
while True :
if self.packet is None:
try:
b = self.bytes_available()
if b == 0:
return
received_data = self.recv(1)
if len(received_data) == 0:
return
self.buffer += received_data
self.packet = packets.create_packet(self.buffer)
except socket.error as err:
if err.errno in [errno.EAGAIN, errno.EINTR]:
return
logger.log_exception(err)
return
else:
try:
try:
if self.bytes_available() < self.packet.MAX_SIZE - 1:
return
received_data = self.recv(self.packet.MAX_SIZE - len(self.buffer))
if len(received_data) == 0:
return
self.buffer += received_data
except socket.error as err:
if err.errno in [errno.EAGAIN, errno.EINTR]:
return
logger.log_exception(err)
return
if len(self.buffer) == self.packet.MAX_SIZE:
# A complete packet has been received, notify the state machine
self.packet.deserialize(self.buffer)
self.event_loop.process(self, self.packet)
self.buffer = bytes()
self.packet = None
except Exception as e:
self.packet = None
self.buffer = bytes()
logger.log_exception(e)
def send_packet(self, packet: Packet):
packet_id: int = packet.id
data: bytes = packet.encode()
packet_bytes = packets.create_packet(packet_id, data)
self.send(packet_bytes)