Mark Doll wrote:
...
> 2. Giving the exact length of "original datagram" in octets to differentiate
> the origianl datagram from a possibly added padding is unnecessary, since the
> length of the original datagram can be deduced from its own length field,
> carried in the IP header of the original datagram itself.

This is true only if the original IP datagram is included in its
entirety. That's not the case for MTU-sized original datagrams, or any
datagram which is otherwise truncated (e.g., for performance).

Joe

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