def MBPostRequest(self, Func, Addr, Qty, TID, UID, Message):
# Check the parameters which represent the URL string.
FunctionCode, Address, Quantity, TransID, UnitID = self._ValidateURLParams(Func, Addr, Qty, TID, UID)
# Check if the values could be read without error.
if ((FunctionCode == None) or (Address == None) or (Quantity == None) or (TransID == None) or (UnitID == None)):
# Set some initial default values for these.
TransID = -1
UnitID = -1
FunctionCode = 0
Address = 0
data = '0000'
exceptioncode = 0
return TransID, UnitID, FunctionCode, Address, data, exceptioncode
# Try to parse the XML message to get just the data portion of the message.
XMLParser = RestXMLParser()
if XMLParser.ParseRequest(Message):
MsgData = XMLParser.GetMsgData()
else:
MsgData = ''
# At this point, the parameters have all be checked to see if they can be used.
# Now validate the data according to the requirements of each function.
if (FunctionCode == 5):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Check if request data is valid.
if MsgData not in ('0000', 'ff00', 'fF00', 'Ff00', 'FF00'):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, MsgData, exceptioncode
elif (FunctionCode == 6):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Check if message length is OK.
if (len(MsgData) != 4):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
else:
# Try to convert to binary string. If no good, then
# the string is not valid hexadecimal data.
try:
temp = ModbusDataStrLib.hex2bin(MsgData)
except:
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, MsgData, exceptioncode
elif (FunctionCode == 15):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Qty of outputs is out of range.
elif ((Quantity < 1) or (Quantity > self._protocollimits[FunctionCode])):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty for coils exceeds the amount of data sent.
elif (Quantity > len(MsgData)):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty for coils is less than the amount of data sent.
elif (Quantity < (len(MsgData) - 8)):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty for coils exceeds amount of data sent.
# Try to convert to binary string. If no good, then
# the string is not valid hexadecimal data.
# Length must also be a multiple of 8.
else:
try:
temp = ModbusDataStrLib.bininversor(MsgData)
except:
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, (Quantity, MsgData), exceptioncode
elif (FunctionCode == 16):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Qty of registers is out of range.
elif ((Quantity < 1) or (Quantity > self._protocollimits[FunctionCode])):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty does not match the amount of data sent.
elif ((Quantity * 4) != len(MsgData)):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Check if message length is OK. Length must be a multiple of 4.
elif ((len(MsgData) % 4) != 0):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
else:
# Try to convert to binary string. If no good, then
# the string is not valid hexadecimal data.
try:
temp = ModbusDataStrLib.hex2bin(MsgData)
except:
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, (Quantity, MsgData), exceptioncode
# Function code is not supported.
else:
# This error code needs special treatment in case of bad function
# codes that are very large.
FunctionCode = (FunctionCode & 0xff) | 0x80 # Create error code.
exceptioncode = 1 # Exception code.
return TransID, UnitID, FunctionCode, 0, '0000', exceptioncode
def MBPostRequest(self, Func, Addr, Qty, TID, UID, Message):
# Check the parameters which represent the URL string.
FunctionCode, Address, Quantity, TransID, UnitID = self._ValidateURLParams(
Func, Addr, Qty, TID, UID)
# Check if the values could be read without error.
if ((FunctionCode == None) or (Address == None) or (Quantity == None)
or (TransID == None) or (UnitID == None)):
# Set some initial default values for these.
TransID = -1
UnitID = -1
FunctionCode = 0
Address = 0
data = '0000'
exceptioncode = 0
return TransID, UnitID, FunctionCode, Address, data, exceptioncode
# Try to parse the XML message to get just the data portion of the message.
XMLParser = RestXMLParser()
if XMLParser.ParseRequest(Message):
MsgData = XMLParser.GetMsgData()
else:
MsgData = ''
# At this point, the parameters have all be checked to see if they can be used.
# Now validate the data according to the requirements of each function.
if (FunctionCode == 5):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Check if request data is valid.
if MsgData not in ('0000', 'ff00', 'fF00', 'Ff00', 'FF00'):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, MsgData, exceptioncode
elif (FunctionCode == 6):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Check if message length is OK.
if (len(MsgData) != 4):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
else:
# Try to convert to binary string. If no good, then
# the string is not valid hexadecimal data.
try:
temp = ModbusDataStrLib.hex2bin(MsgData)
except:
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, MsgData, exceptioncode
elif (FunctionCode == 15):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Qty of outputs is out of range.
elif ((Quantity < 1)
or (Quantity > self._protocollimits[FunctionCode])):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty for coils exceeds the amount of data sent.
elif (Quantity > len(MsgData)):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty for coils is less than the amount of data sent.
elif (Quantity < (len(MsgData) - 8)):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty for coils exceeds amount of data sent.
# Try to convert to binary string. If no good, then
# the string is not valid hexadecimal data.
# Length must also be a multiple of 8.
else:
try:
temp = ModbusDataStrLib.bininversor(MsgData)
except:
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, (
Quantity, MsgData), exceptioncode
elif (FunctionCode == 16):
exceptioncode = 0 # Default exception code.
# Check for address limits.
if not self._AddrLimitsOK(Address, Quantity, FunctionCode):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 2 # Exception code.
# Qty of registers is out of range.
elif ((Quantity < 1)
or (Quantity > self._protocollimits[FunctionCode])):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Qty does not match the amount of data sent.
elif ((Quantity * 4) != len(MsgData)):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
# Check if message length is OK. Length must be a multiple of 4.
elif ((len(MsgData) % 4) != 0):
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
else:
# Try to convert to binary string. If no good, then
# the string is not valid hexadecimal data.
try:
temp = ModbusDataStrLib.hex2bin(MsgData)
except:
FunctionCode = FunctionCode + 128 # Create error code.
exceptioncode = 3 # Exception code.
return TransID, UnitID, FunctionCode, Address, (
Quantity, MsgData), exceptioncode
# Function code is not supported.
else:
# This error code needs special treatment in case of bad function
# codes that are very large.
FunctionCode = (FunctionCode & 0xff) | 0x80 # Create error code.
exceptioncode = 1 # Exception code.
return TransID, UnitID, FunctionCode, 0, '0000', exceptioncode
