def decode_name_component(self, decoder: TlvDecoder) -> bytearray:
"""
Decode a name component
:param decoder: Decoder
:return: Value of name component
"""
savePosition = decoder.getOffset()
type = decoder.readVarNumber()
decoder.seek(savePosition)
return decoder.readBlobTlv(type).tobytes()
def decode_nack(self, input: bytearray) -> (Name, NackReason):
"""
Decode NACK packet
:param input: Data packet in NDN-TLV wire format
:return: Name
"""
# decode name
name = self.decode_interest(input[13:])
# decode nack reason
decoder = TlvDecoder(input)
decoder.readNestedTlvsStart(Tlv.LpPacket_LpPacket)
decoder.readNestedTlvsStart(Tlv.LpPacket_Nack)
try:
decoder.readNestedTlvsStart(Tlv.LpPacket_NackReason)
wire_reason = decoder.readVarNumber()
reason = self.__nack_reason_enum[wire_reason]
except ValueError:
# happens when nack reason is not specified
reason = NackReason.NOT_SET
return (name, reason)