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Re: I Need to register some DLTs


From: Guy Harris <guy () alum mit edu>
Date: Tue, 18 Sep 2007 20:31:40 -0700


On Aug 24, 2007, at 2:33 PM, Luis EG Ontanon wrote:

Hi,
I Need to register two DLTs they would be:

DLT_MTP2_MULTISTANDARD
that will have a one byte pseudo header of which the MS bit indicates
the direction the next three bits are reserved and must be set to zero
in writing the last nibble is used to indicate the standard used for
mtp3 packets transported (0000=itu, 0001=ansi, 0010=japan, 0011=china,
other values are reserved for future extensions), readers must ignore
the contents of the three reserved bits.


DLT_MTP3_MULTISTANDARD
that will have a one byte pseudo header of which the MS nibble is
reserved and must be set to zero in writing the last two are used to
indicate the standard used for mtp3 packets transported (0000=itu,
0001=ansi, 0010=japan, 0011=china, other values are reserved for
future extensions), readers must ignore the contents of the reserved
bits.

Is a capture likely to have a mix of packets for different MTP3 standards? And are there likely to be more types in the future?

If not, should we just have multiple DLT_MTP2_ and DLT_MTP3_ values?
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