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answered 2023-06-24 17:17:07 +0000

Chuckc gravatar image

https://datatracker.ietf.org/doc/html/rfc1035#section-4.1.4

The pointer takes the form of a two octet sequence:

    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    | 1  1|                OFFSET                   |
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

Did the pointer exceed 255 so needed a bit in the upper octet?

https://datatracker.ietf.org/doc/html/rfc1035#section-4.1.4

The pointer takes the form of a two octet sequence:

    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    | 1  1|                OFFSET                   |
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

Did the pointer offset exceed 255 so needed a bit in the upper octet?