def _do_run(self):
"""main function of the server"""
try:
# check the status of every socket
request = utils.to_data('')
if self._block_on_first_byte:
# do a blocking read for first byte
self._serial.timeout = None
try:
read_bytes = self._serial.read(1)
request += read_bytes
except Exception as e:
self._serial.close()
self._serial.open()
self._serial.timeout = self._timeout
# Read rest of the request
while True:
try:
read_bytes = self._serial.read(128)
if not read_bytes:
break
except Exception as e:
self._serial.close()
self._serial.open()
break
request += read_bytes
# parse the request
if request:
retval = call_hooks("modbus_rtu.RtuServer.after_read", (self, request))
if retval is not None:
request = retval
response = self._handle(request)
# send back the response
retval = call_hooks("modbus_rtu.RtuServer.before_write", (self, response))
if retval is not None:
response = retval
if response:
if self._serial.in_waiting > 0:
# Most likely master timed out on this request and started a new one
# for which we already received atleast 1 byte
LOGGER.warning("Not sending response because there is new request pending")
else:
self._serial.write(response)
self._serial.flush()
time.sleep(self.get_timeout())
call_hooks("modbus_rtu.RtuServer.after_write", (self, response))
except Exception as excpt:
LOGGER.error("Error while handling request, Exception occurred: %s", excpt)
call_hooks("modbus_rtu.RtuServer.on_error", (self, excpt))
def _do_run(self):
"""main function of the server"""
try:
# check the status of every socket
request = utils.to_data('')
if self._block_on_first_byte:
# do a blocking read for first byte
self._serial.timeout = None
try:
read_bytes = self._serial.read(1)
request += read_bytes
except Exception as e:
self._serial.close()
self._serial.open()
self._serial.timeout = self._timeout
# Read rest of the request
while True:
try:
read_bytes = self._serial.read(128)
if not read_bytes:
break
except Exception as e:
self._serial.close()
self._serial.open()
break
request += read_bytes
# parse the request
if request:
retval = call_hooks("modbus_rtu.RtuServer.after_read", (self, request))
if retval is not None:
request = retval
response = self._handle(request)
# send back the response
retval = call_hooks("modbus_rtu.RtuServer.before_write", (self, response))
if retval is not None:
response = retval
if response:
if self._serial.in_waiting > 0:
# Most likely master timed out on this request and started a new one
# for which we already received atleast 1 byte
LOGGER.warning("Not sending response because there is new request pending")
else:
self._serial.write(response)
self._serial.flush()
time.sleep(self.get_timeout())
call_hooks("modbus_rtu.RtuServer.after_write", (self, response))
except Exception as excpt:
LOGGER.error("Error while handling request, Exception occurred: %s", excpt)
call_hooks("modbus_rtu.RtuServer.on_error", (self, excpt))
def _do_exit(self):
"""clean the server tasks"""
#close the sockets
for sock in self._sockets:
try:
sock.close()
self._sockets.remove(sock)
except Exception as msg:
LOGGER.warning("Error while closing socket, Exception occurred: %s", msg)
self._sock.close()
self._sock = None
def _do_run(self):
"""called in a almost-for-ever loop by the server"""
# check the status of every socket
inputready = select.select(self._sockets, [], [], 1.0)[0]
#print(inputready)
# handle data on each a socket
for sock in inputready:
try:
if sock == self._sock:
#print (self._sock)
# handle the server socket
#print ("Receiveeeeeeeeeeeeeeeeeeeee")
client, address = self._sock.accept()
client.setblocking(0)
LOGGER.debug("%s is connected with socket %d...",
str(address), client.fileno())
self._sockets.append(client)
call_hooks("modbus_tcp.TcpServer.on_connect",
(self, client, address))
return
else:
if len(sock.recv(1, socket.MSG_PEEK)) == 0:
# socket is disconnected
LOGGER.debug("%d is disconnected" % (sock.fileno()))
call_hooks("modbus_tcp.TcpServer.on_disconnect",
(self, sock))
sock.close()
self._sockets.remove(sock)
break
# handle all other sockets
sock.settimeout(1.0)
request = to_data("")
is_ok = True
# read the 7 bytes of the mbap
while (len(request) < 7) and is_ok:
new_byte = sock.recv(1)
if len(new_byte) == 0:
is_ok = False
else:
request += new_byte
retval = call_hooks("modbus_tcp.TcpServer.after_recv",
(self, sock, request))
if retval is not None:
request = retval
if is_ok:
# read the rest of the request
length = self._get_request_length(request)
while (len(request) < (length + 6)) and is_ok:
new_byte = sock.recv(1)
if len(new_byte) == 0:
is_ok = False
else:
request += new_byte
if is_ok:
response = ""
# parse the request
try:
response = self._handle(request)
except Exception as msg:
LOGGER.error(
"Error while handling a request, Exception occurred: %s",
msg)
# send back the response
if response:
try:
retval = call_hooks(
"modbus_tcp.TcpServer.before_send",
(self, sock, response))
if retval is not None:
response = retval
sock.send(response)
call_hooks("modbus_tcp.TcpServer.after_send",
(self, sock, response))
except Exception as msg:
is_ok = False
LOGGER.error(
"Error while sending on socket %d, Exception occurred: %s",
sock.fileno(), msg)
except Exception as excpt:
LOGGER.warning("Error while processing data on socket %d: %s",
sock.fileno(), excpt)
call_hooks("modbus_tcp.TcpServer.on_error",
(self, sock, excpt))
sock.close()
self._sockets.remove(sock)
def _do_run(self):
"""called in a almost-for-ever loop by the server"""
# check the status of every socket
inputready = select.select(self._sockets, [], [], 1.0)[0]
# handle data on each a socket
for sock in inputready:
try:
if sock == self._sock:
# handle the server socket
client, address = self._sock.accept()
client.setblocking(0)
LOGGER.info("%s is connected with socket %d...", str(address), client.fileno())
self._sockets.append(client)
call_hooks("modbus_tcp.TcpServer.on_connect", (self, client, address))
else:
if len(sock.recv(1, socket.MSG_PEEK)) == 0:
# socket is disconnected
LOGGER.info("%d is disconnected" % (sock.fileno()))
call_hooks("modbus_tcp.TcpServer.on_disconnect", (self, sock))
sock.close()
self._sockets.remove(sock)
break
# handle all other sockets
sock.settimeout(1.0)
request = to_data("")
is_ok = True
# read the 7 bytes of the mbap
while (len(request) < 7) and is_ok:
new_byte = sock.recv(1)
if len(new_byte) == 0:
is_ok = False
else:
request += new_byte
retval = call_hooks("modbus_tcp.TcpServer.after_recv", (self, sock, request))
if retval is not None:
request = retval
if is_ok:
# read the rest of the request
length = self._get_request_length(request)
while (len(request) < (length + 6)) and is_ok:
new_byte = sock.recv(1)
if len(new_byte) == 0:
is_ok = False
else:
request += new_byte
if is_ok:
response = ""
# parse the request
try:
response = self._handle(request)
except Exception as msg:
LOGGER.error("Error while handling a request, Exception occurred: %s", msg)
# send back the response
if response:
try:
retval = call_hooks("modbus_tcp.TcpServer.before_send", (self, sock, response))
if retval is not None:
response = retval
sock.send(response)
call_hooks("modbus_tcp.TcpServer.after_send", (self, sock, response))
except Exception as msg:
is_ok = False
LOGGER.error(
"Error while sending on socket %d, Exception occurred: %s", sock.fileno(), msg
)
except Exception as excpt:
LOGGER.warning("Error while processing data on socket %d: %s", sock.fileno(), excpt)
call_hooks("modbus_tcp.TcpServer.on_error", (self, sock, excpt))
sock.close()
self._sockets.remove(sock)
def _do_exit(self):
"""clean the server tasks"""
#close the sockets
for sock in self._sockets:
try:
sock.close()
self._sockets.remove(sock)
except Exception as msg:
LOGGER.warning("Error while closing socket, Exception occurred: %s", msg)
self._sock.close()
self._sock = None
