def data_in(self, vcdu):
"""
Takes in VCDUs for the channel handler to process
:param packet: Parsed VCDU object
"""
# Check VCDU continuity
self.VCDU_continuity(vcdu)
# Parse M_PDU
mpdu = CCSDS.M_PDU(vcdu.MPDU)
# If M_PDU contains CP_PDU header
if mpdu.HEADER:
# If data preceeds header
if mpdu.POINTER != 0:
# Finish previous CP_PDU
preptr = mpdu.PACKET[:mpdu.POINTER]
try:
lenok, crcok = self.cCPPDU.finish(preptr, self.crclut)
if self.verbose: self.check_CPPDU(lenok, crcok)
# Handle finished CP_PDU
self.handle_CPPDU(self.cCPPDU)
except AttributeError:
if self.verbose:
print(" NO CP_PDU TO FINISH (DROPPED PACKETS?)")
#TODO: Check CP_PDU continuity
# Create new CP_PDU
postptr = mpdu.PACKET[mpdu.POINTER:]
self.cCPPDU = CCSDS.CP_PDU(postptr)
else:
# First CP_PDU in TP_File
# Create new CP_PDU
self.cCPPDU = CCSDS.CP_PDU(mpdu.PACKET)
#TODO: Finish SEQ LAST CP_PDU before going to FILL
# Handle special EOF CP_PDU
if self.cCPPDU.is_EOF():
self.cCPPDU = None
else:
if self.verbose:
self.cCPPDU.print_info()
print(" HEADER: 0x{}".format(
hex(mpdu.POINTER)[2:].upper()))
else:
# Append packet to current CP_PDU
try:
self.cCPPDU.append(mpdu.PACKET)
except AttributeError:
if self.verbose:
print(" NO CP_PDU TO APPEND M_PDU TO (DROPPED PACKETS?)")
def data_in(self, vcdu):
"""
Takes in VCDUs for the channel handler to process
:param packet: Parsed VCDU object
"""
# Check VCDU continuity counter
self.continuity(vcdu)
# Parse M_PDU
mpdu = CCSDS.M_PDU(vcdu.MPDU)
# If M_PDU contains CP_PDU header
if mpdu.HEADER:
# If data preceeds header
if mpdu.POINTER != 0:
# Finish previous CP_PDU
preptr = mpdu.PACKET[:mpdu.POINTER]
try:
lenok, crcok = self.cCPPDU.finish(preptr, self.crclut)
if self.verbose: self.check_CPPDU(lenok, crcok)
# Handle finished CP_PDU
self.handle_CPPDU(self.cCPPDU)
except AttributeError:
if self.verbose:
print(" NO CP_PDU TO FINISH (DROPPED PACKETS?)")
#TODO: Check CP_PDU continuity
# Create new CP_PDU
postptr = mpdu.PACKET[mpdu.POINTER:]
self.cCPPDU = CCSDS.CP_PDU(postptr)
# Need more data to parse CP_PDU header
if not self.cCPPDU.PARSED:
return
# Handle CP_PDUs less than one M_PDU in length
if 1 < self.cCPPDU.LENGTH < 886 and len(
self.cCPPDU.PAYLOAD) > self.cCPPDU.LENGTH:
# Remove trailing null bytes (M_PDU padding)
self.cCPPDU.PAYLOAD = self.cCPPDU.PAYLOAD[:self.cCPPDU.
LENGTH]
try:
lenok, crcok = self.cCPPDU.finish(b'', self.crclut)
if self.verbose: self.check_CPPDU(lenok, crcok)
# Handle finished CP_PDU
self.handle_CPPDU(self.cCPPDU)
except AttributeError:
if self.verbose:
print(" NO CP_PDU TO FINISH (DROPPED PACKETS?)")
else:
# First CP_PDU in TP_File
# Create new CP_PDU
self.cCPPDU = CCSDS.CP_PDU(mpdu.PACKET)
# Handle special EOF CP_PDU
if self.cCPPDU.is_EOF():
self.cCPPDU = None
if self.verbose: print(" [CP_PDU] EOF MARKER")
else:
if self.verbose:
self.cCPPDU.print_info()
print(" HEADER: 0x{}".format(
self.cCPPDU.header.hex().upper()))
print(" OFFSET: 0x{}\n ".format(
hex(mpdu.POINTER)[2:].upper()),
end="")
else:
# Append packet to current CP_PDU
try:
wasparsed = self.cCPPDU.PARSED
self.cCPPDU.append(mpdu.PACKET)
if wasparsed != self.cCPPDU.PARSED and self.verbose:
self.cCPPDU.print_info()
print(" HEADER: 0x{}".format(
self.cCPPDU.header.hex().upper()))
print(" OFFSET: SPANS MULTIPLE M_PDUs\n", end="")
except AttributeError:
if self.verbose:
print(" NO CP_PDU TO APPEND M_PDU TO (DROPPED PACKETS?)")
# VCDU indicator
if self.verbose: print(".", end="")
sys.stdout.flush()
def data_in(self, vcdu):
"""
Takes in VCDUs for the channel handler to process
:param packet: Parsed VCDU object
"""
# Check VCDU continuity counter
self.continuity(vcdu)
# Parse M_PDU
mpdu = CCSDS.M_PDU(vcdu.MPDU)
# If M_PDU contains CP_PDU header
if mpdu.HEADER:
# No current TP_File and CP_PDU header is at the start of M_PDU
if self.cTPFile == None and mpdu.POINTER == 0:
# Create CP_PDU for new TP_File
self.cCPPDU = CCSDS.CP_PDU(mpdu.PACKET)
# Continue unfinished TP_File
else:
# If M_PDU contains data from previous CP_PDU
if mpdu.POINTER != 0:
# Finish previous CP_PDU
preptr = mpdu.PACKET[:mpdu.POINTER]
else:
# No data to append
preptr = b''
try:
lenok, crcok = self.cCPPDU.finish(preptr, self.config.lut)
if self.config.verbose: self.check_CPPDU(lenok, crcok)
# Handle finished CP_PDU
self.handle_CPPDU(self.cCPPDU)
except AttributeError:
if self.config.verbose:
print(" " + Fore.WHITE + Back.RED + Style.BRIGHT +
"NO CP_PDU TO FINISH (DROPPED PACKETS?)")
# Create new CP_PDU
postptr = mpdu.PACKET[mpdu.POINTER:]
self.cCPPDU = CCSDS.CP_PDU(postptr)
# Need more data to parse CP_PDU header
if not self.cCPPDU.PARSED:
return
# Handle CP_PDUs less than one M_PDU in length
if 1 < self.cCPPDU.LENGTH < 886 and len(
self.cCPPDU.PAYLOAD) > self.cCPPDU.LENGTH:
# Remove trailing null bytes (M_PDU padding)
self.cCPPDU.PAYLOAD = self.cCPPDU.PAYLOAD[:self.cCPPDU.
LENGTH]
try:
lenok, crcok = self.cCPPDU.finish(b'', self.config.lut)
if self.config.verbose: self.check_CPPDU(lenok, crcok)
# Handle finished CP_PDU
self.handle_CPPDU(self.cCPPDU)
except AttributeError:
if self.config.verbose:
print(" " + Fore.WHITE + Back.RED + Style.BRIGHT +
"NO CP_PDU TO FINISH (DROPPED PACKETS?)")
# Handle special EOF CP_PDU (by ignoring it)
if self.cCPPDU.is_EOF():
self.cCPPDU = None
if self.config.verbose:
print(" " + Fore.GREEN + Style.BRIGHT +
"[CP_PDU] EOF MARKER\n")
else:
if self.config.verbose:
self.cCPPDU.print_info()
print(" HEADER: 0x{}".format(
self.cCPPDU.header.hex().upper()))
print(" OFFSET: 0x{}\n ".format(
hex(mpdu.POINTER)[2:].upper()),
end="")
else:
# Append M_PDU payload to current CP_PDU
try:
# Check if CP_PDU header has been parsed
wasparsed = self.cCPPDU.PARSED
# Add data from current M_PDU
self.cCPPDU.append(mpdu.PACKET)
# If CP_PDU header was just parsed, print CP_PDU header info
if wasparsed != self.cCPPDU.PARSED and self.config.verbose:
self.cCPPDU.print_info()
print(" HEADER: 0x{}".format(
self.cCPPDU.header.hex().upper()))
print(" OFFSET: SPANS MULTIPLE M_PDUs\n", end="")
except AttributeError:
if self.config.verbose:
print(" " + Fore.WHITE + Back.RED + Style.BRIGHT +
"NO CP_PDU TO APPEND M_PDU TO (DROPPED PACKETS?)")
# VCDU indicator
if self.config.verbose: print(".", end="")
sys.stdout.flush()