Class RTPSSubMessage_ACKNACK

scapy/contrib/rtps/rtps.py:315–357

0...2...........7...............15.............23...............31 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ACKNACK | flags | octetsToNextHeader | +---------------+---------------+---------------+---------------+ | EntityId rea

class RTPSSubMessage_ACKNACK(EPacket):
    """
    0...2...........7...............15.............23...............31
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |   ACKNACK     |     flags     |      octetsToNextHeader       |
    +---------------+---------------+---------------+---------------+
    | EntityId readerEntityId                                       |
    +---------------+---------------+---------------+---------------+
    | EntityId writerEntityId                                       |
    +---------------+---------------+---------------+---------------+
    |                                                               |
    + SequenceNumberSet readerSNState                               +
    |                                                               |
    +---------------+---------------+---------------+---------------+
    | Counter count                                                 |
    +---------------+---------------+---------------+---------------+
    """

    name = "RTPS ACKNACK (0x06)"
    fields_desc = [
        XByteField("submessageId", 0x06),
        XByteField("submessageFlags", 0x00),
        EField(ShortField("octetsToNextHeader", 0),
               endianness_from=e_flags),
        EnumField(
            "reader_id",
            default=b"\x00\x00\x00\x00",
            fmt="4s",
            enum=_rtps_reserved_entity_ids,
        ),
        EnumField(
            "writer_id",
            default=b"\x00\x00\x00\x00",
            fmt="4s",
            enum=_rtps_reserved_entity_ids,
        ),
        XStrLenField(
            "readerSNState",
            0, length_from=lambda pkt: pkt.octetsToNextHeader - 8 - 4
        ),
        EField(IntField("count", 0),
               endianness_from=e_flags),
    ]


class RTPSSubMessage_HEARTBEAT(EPacket):