kern/125003: incorrect EtherIP header format.

Shunsuke SHINOMIYA shino at fornext.org
Fri Jun 27 06:01:15 UTC 2008


> sh>  In current implementation, 0x03 is transmitted, and, next, 0x00 is
> sh>  transmitted as version(3) and reserved(0x000) field. But I think that
> sh>  0x30 should be transmitted first from RFC3378.
> 
>  I don't understand why you think 0x30 is correct.

From RFC3378
> In summary, the EtherIP Header has two fields:
> 
>       Bits 0-3:  Protocol version
>       Bits 4-15: Reserved for future use
> 
>         0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
>      +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
>      |               |                                               |
>      |    VERSION    |                   RESERVED                    |
>      |               |                                               |
>      +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
> 
>                  Figure 2: EtherIP Header Format (in bits)
> 

, first octet(bit 0,MSB to 7) consists of VERSION and a part of RESERVED.
And VERSION is high 4 bits of the octet.
Am I misunderstanding this?

-- 
Shunsuke SHINOMIYA <shino at fornext.org>



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