Hey guys, I have a basic question which I'm stucked.... Im trying to use the TSecr (tcp.options.timestamp.tsecr) in order to help me calculate RTT since its stores time info from the sending server... I just dont have any clue how to transform the values of Tsecr into time information in order to calculate the RTT. As far as I understood RTT would be RTT = Actual Time (for ACK) - TSecr but since it seems that TSecr is a field of 32 bits I have no clue how to transform it into time reference in order to help into RTT calculations. Kind Regards Bruno asked 17 Jul '12, 00:39  bmaia18 |
One Answer:
The value of the TSecr field are in 'ticks' where the advise is to use a value between 1ms and 1s for each tick. But each system uses it's own tick value. So in order to use the TSecr value to calulate a time difference, you must first calculate the tick value for the specific host. See RFC 1323 paragraph 4.2.2 answered 17 Jul '12, 01:26  SYN-bit ♦♦ |
