def notify(self, vcid):
"""
Notifies virtual channel handler of change in VCID
"""
# No longer the active channel handler
if vcid != self.VCID:
# Channel has unfinished TP_File
if self.cTPFile != None:
# Handle S_PDU (decryption)
spdu = CCSDS.S_PDU(self.cTPFile.PAYLOAD, self.keys)
# Create new xRIT file
xrit = CCSDS.xRIT(spdu.PLAINTEXT)
xrit.save(self.outputPath)
xrit.print_info()
if len(self.cTPFile.PAYLOAD) < self.cTPFile.LENGTH:
print(
" FILE IS INCOMPLETE (Known issue with COMSFOG / COMSIR images)"
)
ac = len(self.cTPFile.PAYLOAD)
ex = self.cTPFile.LENGTH
p = round((ac / ex) * 100)
print(" {}% OF EXPECTED LENGTH".format(p))
# Clear finished TP_File
self.cTPFile = None
def notify(self, vcid):
"""
Notifies virtual channel handler of change in VCID
"""
# No longer the active channel handler
if vcid != self.config.VCID:
# Channel has unfinished TP_File
if self.cTPFile != None:
# Handle S_PDU (decryption)
spdu = CCSDS.S_PDU(self.cTPFile.PAYLOAD, self.config.keys)
# Handle xRIT file
self.handle_xRIT(spdu)
if len(self.cTPFile.PAYLOAD) < self.cTPFile.LENGTH:
print(
" " + Fore.WHITE + Back.RED + Style.BRIGHT +
"FILE IS INCOMPLETE (Known issue with COMSFOG / COMSIR images)"
)
ac = len(self.cTPFile.PAYLOAD)
ex = self.cTPFile.LENGTH
p = round((ac / ex) * 100)
print(" " + Fore.WHITE + Back.RED + Style.BRIGHT +
"{}% OF EXPECTED LENGTH".format(p))
# Clear finished TP_File
self.cTPFile = None
elif self.cProduct != None:
# Save and clear current product
self.cProduct.save()
self.cProduct = None
def handle_CPPDU(self, cppdu):
"""
Processes complete CP_PDUs to build a TP_File
"""
if cppdu.SEQ == cppdu.Sequence.FIRST:
# Create new TP_File
self.cTPFile = CCSDS.TP_File(cppdu.PAYLOAD[:-2])
elif cppdu.SEQ == cppdu.Sequence.CONTINUE:
# Add data to TP_File
self.cTPFile.append(cppdu.PAYLOAD[:-2])
elif cppdu.SEQ == cppdu.Sequence.LAST:
# Close current TP_File
lenok = self.cTPFile.finish(cppdu.PAYLOAD[:-2])
if self.config.verbose: self.cTPFile.print_info()
if lenok:
if self.config.verbose:
print(" " + Fore.GREEN + Style.BRIGHT +
"LENGTH: OK\n")
# Handle S_PDU (decryption)
spdu = CCSDS.S_PDU(self.cTPFile.PAYLOAD, self.config.keys)
# Handle xRIT file
self.handle_xRIT(spdu)
# Print key index
if self.config.verbose:
print(" KEY INDEX: 0x{}\n".format(
hex(int.from_bytes(spdu.index,
byteorder="big"))[2:].upper()))
elif not lenok:
ex = self.cTPFile.LENGTH
ac = len(self.cTPFile.PAYLOAD)
diff = ac - ex
if self.config.verbose:
print(
" " + Fore.WHITE + Back.RED + Style.BRIGHT +
"LENGTH: ERROR (EXPECTED: {}, ACTUAL: {}, DIFF: {})"
.format(ex, ac, diff))
print(" " + Fore.WHITE + Back.RED + Style.BRIGHT +
"SKIPPING FILE DUE TO DROPPED PACKETS")
# Clear finished TP_File
self.cTPFile = None
if self.config.verbose:
ac = len(self.cTPFile.PAYLOAD)
ex = self.cTPFile.LENGTH
p = round((ac / ex) * 100)
diff = ex - ac
print(
" [TP_File] CURRENT LEN: {} ({}%) EXPECTED LEN: {} DIFF: {}\n\n\n"
.format(ac, p, ex, diff))
def handle_CPPDU(self, cppdu):
"""
Processes complete CP_PDUs to build a TP_File
"""
if cppdu.SEQ == cppdu.Sequence.FIRST:
# Create new TP_File
self.cTPFile = CCSDS.TP_File(cppdu.PAYLOAD[:-2])
elif cppdu.SEQ == cppdu.Sequence.CONTINUE:
# Add data to TP_File
self.cTPFile.append(cppdu.PAYLOAD[:-2])
elif cppdu.SEQ == cppdu.Sequence.LAST:
# Close current TP_File
lenok = self.cTPFile.finish(cppdu.PAYLOAD[:-2])
if self.verbose: self.cTPFile.print_info()
if lenok:
if self.verbose: print(" LENGTH: OK\n")
# Handle S_PDU (decryption)
spdu = CCSDS.S_PDU(self.cTPFile.PAYLOAD, self.keys)
# Create new xRIT file
xrit = CCSDS.xRIT(spdu.PLAINTEXT)
xrit.save(self.outputPath)
xrit.print_info()
elif not lenok:
ex = self.cTPFile.LENGTH
ac = len(self.cTPFile.PAYLOAD)
diff = ac - ex
if self.verbose:
print(
" LENGTH: ERROR (EXPECTED: {}, ACTUAL: {}, DIFF: {})"
.format(ex, ac, diff))
print(" SKIPPING FILE (DROPPED PACKETS?)")
# Clear finished TP_File
self.cTPFile = None
if self.verbose:
ac = len(self.cTPFile.PAYLOAD)
ex = self.cTPFile.LENGTH
p = round((ac / ex) * 100)
diff = ex - ac
print(
" [TP_File] CURRENT LEN: {} ({}%) EXPECTED LEN: {} DIFF: {}\n\n\n"
.format(ac, p, ex, diff))
def handle_CPPDU(self, cppdu):
"""
Processes complete CP_PDUs to build a TP_File
"""
if cppdu.SEQ == "FIRST":
# Create new TP_File
self.cTPFile = CCSDS.TP_File(cppdu.PAYLOAD[:-2])
elif cppdu.SEQ == "CONTINUE":
# Add data to TP_File
self.cTPFile.append(cppdu.PAYLOAD[:-2])
elif cppdu.SEQ == "LAST":
# Close current TP_File
lenok = self.cTPFile.finish(cppdu.PAYLOAD[:-2])
if self.verbose: self.cTPFile.print_info()
if lenok:
if self.verbose: print(" LENGTH: OK\n")
# Handle S_PDU (decryption)
spdu = CCSDS.S_PDU(self.cTPFile.PAYLOAD, self.keys)
# Create new xRIT file
xrit = CCSDS.xRIT(spdu.PLAINTEXT)
xrit.save(self.outputPath)
xrit.print_info()
elif not lenok:
ex = self.cTPFile.LENGTH
ac = len(self.cTPFile.PAYLOAD)
diff = ac - ex
if self.verbose:
print(
" LENGTH: ERROR (EXPECTED: {}, ACTUAL: {}, DIFF: {})"
.format(ex, ac, diff))
print(" SKIPPING FILE (DROPPED PACKETS?)")