Incorrect TransportSpecific field value

Portable, complete and BSD-licenced IEEE 1588 (PTP) implementation

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#25 Incorrect TransportSpecific field value

Status: closed

Owner: Wojciech Owczarek

Labels: None

Priority: 5

Updated: 2012-06-25

Created: 2012-01-10

Creator: Wojciech Owczarek

Private: No

dep/msg.c:

Nibble transport = 0x80;

This should be changed to:

Nibble transport = 0x00;

As per IEEE1588-2008 spec section F.4, this field should be equal zero unless running P802.1AS. With the current code, this prevents delay request / response from working. I have tested this with several hardware GMs and changing the field value to zero fixes it.

Thanks
owczi

Discussion

Wojciech Owczarek - 2012-01-26

Correction... F.4 is the Ethernet transport section. UDP/IP is D.4 (table D.2).

So this field should be set to 0x80 (bit 0 set to 1) only to request padding of packets. Maybe this should be made configurable instead?

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Wojciech Owczarek - 2012-06-25

assigned_to: nobody --> wowczarek

status: open --> closed-fixed
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Incorrect TransportSpecific field value

Portable, complete and BSD-licenced IEEE 1588 (PTP) implementation

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#25 Incorrect TransportSpecific field value

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