def __init__(self, code, subcode, data=b'', parse_data=True):
self.code = code
self.subcode = subcode
if not parse_data:
self.data = data
return
if not (code, subcode) in [(6, 2), (6, 4)]:
self.data = data if not len(
[_ for _ in str(data)
if _ not in string.printable]) else hexbytes(data)
return
if len(data) == 0:
# shutdown without shutdown communication (the old fashioned way)
self.data = b''
return
# draft-ietf-idr-shutdown or the peer was using 6,2 with data
shutdown_length = ordinal(data[0])
data = data[1:]
if shutdown_length == 0:
self.data = b"empty Shutdown Communication."
# move offset past length field
return
if len(data) < shutdown_length:
self.data = b"invalid Shutdown Communication (buffer underrun) length : %i [%s]" % (
shutdown_length, hexstring(data))
return
if shutdown_length > 128:
self.data = b"invalid Shutdown Communication (too large) length : %i [%s]" % (
shutdown_length, hexstring(data))
return
try:
self.data = b'Shutdown Communication: "%s"' % \
data[:shutdown_length].decode('utf-8').replace('\r',' ').replace('\n',' ')
except UnicodeDecodeError:
self.data = b"invalid Shutdown Communication (invalid UTF-8) length : %i [%s]" % (
shutdown_length, hexstring(data))
return
trailer = data[shutdown_length:]
if trailer:
self.data += b", trailing data: " + hexstring(trailer)
def __init__ (self, code, subcode, data=b'', parse_data=True):
self.code = code
self.subcode = subcode
if not parse_data:
self.data = data
return
if not (code, subcode) in [(6, 2), (6, 4)]:
self.data = data if not len([_ for _ in str(data) if _ not in string.printable]) else hexbytes(data)
return
if len(data) == 0:
# shutdown without shutdown communication (the old fashioned way)
self.data = b''
return
# draft-ietf-idr-shutdown or the peer was using 6,2 with data
shutdown_length = ordinal(data[0])
data = data[1:]
if shutdown_length == 0:
self.data = b"empty Shutdown Communication."
# move offset past length field
return
if len(data) < shutdown_length:
self.data = b"invalid Shutdown Communication (buffer underrun) length : %i [%s]" % (shutdown_length, hexstring(data))
return
if shutdown_length > 128:
self.data = b"invalid Shutdown Communication (too large) length : %i [%s]" % (shutdown_length, hexstring(data))
return
try:
self.data = b'Shutdown Communication: "%s"' % \
data[:shutdown_length].decode('utf-8').replace('\r',' ').replace('\n',' ')
except UnicodeDecodeError:
self.data = b"invalid Shutdown Communication (invalid UTF-8) length : %i [%s]" % (shutdown_length, hexstring(data))
return
trailer = data[shutdown_length:]
if trailer:
self.data += b", trailing data: " + hexstring(trailer)