def decode(self, file):
iBeforeDecode = file.tell()
headerParams = self.decodeHeader(file)
pduKlass = operations.getPDUClass(headerParams['command_id'])
pdu = pduKlass(headerParams['sequence_number'],
headerParams['command_status'])
self.decodeBody(file, pdu,
headerParams['command_length'] - self.HEADER_LEN)
iAfterDecode = file.tell()
parsedLen = iAfterDecode - iBeforeDecode
# Jasmin update:
# Related to #124, don't error if parsedLen is greater than command_length,
# there can be some padding in PDUs, this is a fix to be confirmed for stability
if headerParams['command_length'] > parsedLen:
padBytes = file.read(headerParams['command_length'] - parsedLen)
if len(padBytes) != headerParams['command_length'] - parsedLen:
raise PDUCorruptError(
"Invalid command length: expected %d, parsed %d, padding bytes not found"
% (headerParams['command_length'], parsedLen),
pdu_types.CommandStatus.ESME_RINVCMDLEN)
elif parsedLen < headerParams['command_length']:
raise PDUCorruptError(
"Invalid command length: expected %d, parsed %d" %
(headerParams['command_length'], parsedLen),
pdu_types.CommandStatus.ESME_RINVCMDLEN)
return pdu
def read(self, file, size):
bytesRead = file.read(size)
length = len(bytesRead)
if length == 0:
raise PDUCorruptError("Unexpected EOF", pdu_types.CommandStatus.ESME_RINVMSGLEN)
if length != size:
raise PDUCorruptError("Length mismatch. Expecting %d bytes. Read %d" % (size, length), pdu_types.CommandStatus.ESME_RINVMSGLEN)
return bytesRead
def decodeHeader(self, file):
headerParams = self.decodeRequiredParams(self.HeaderParams,
self.HeaderEncoders, file)
if headerParams['command_length'] < self.HEADER_LEN:
raise PDUCorruptError(
"Invalid command_length %d" % headerParams['command_length'],
pdu_types.CommandStatus.ESME_RINVCMDLEN)
return headerParams
def decode(self, file):
iBeforeDecode = file.tell()
headerParams = self.decodeHeader(file)
pduKlass = operations.getPDUClass(headerParams['command_id'])
pdu = pduKlass(headerParams['sequence_number'],
headerParams['command_status'])
self.decodeBody(file, pdu,
headerParams['command_length'] - self.HEADER_LEN)
iAfterDecode = file.tell()
parsedLen = iAfterDecode - iBeforeDecode
if parsedLen != headerParams['command_length']:
raise PDUCorruptError(
"Invalid command length: expected %d, parsed %d" %
(headerParams['command_length'], parsedLen),
pdu_types.CommandStatus.ESME_RINVCMDLEN)
return pdu