PTP- Why clock is updated after the Follow-up but not after Delay response packet.

[srivallik-eaton]

Hi,

I am using nucleo STM32H743zi controller.
I am using linux machine as host and my controller as slave in E2E mode.
I have used DHCP mode.
I have below few questions for which I was unable to find answers for:
It will be really helpful if I can get answers to these questions.

1. Why is the internal timing or the clock updated soon after the Follow-up message is received. Should not the clock be updated after delay response is received from master. (in protocol.c, function name: handleFollowUp( ))

2. Since the sequence ID is int16_t it is storing negative sequence numbers. (in datatypes.h)

3. Is there any work-around the internal time exceeding the integer limit after 2038. (in arith.c)

Thank you