[ntpwg] Handling KOD packets

[Danny Mayer]

Johannes Maximilian � wrote:
> Hello NTP workgroup,
> 
> I'm Max, the GSoC student working on the sntp client. I have a few
> questions regarding KOD packets. 
> 
> First of all I should say that the sntp client I'm writing will get a 
> "daemon wrapper" but wont run as daemon out of the box so the KOD packet
> records wouldn't be long in its memory. 
> 
> When a KOD has been received, how long should the record of this
> KOD package be valid? Is there a certain amount of time after which we
> can ignore that we've received KOD packet from a server once?
> 
> When a server sends a KOD packet, will it treat the timestamps as usual?
> (moving the transmit timestamp to the origin timestamp. I'm comparing
> the origin timestamp of the packet the client received after sending a
> packet with the transmit timestamp to the server before to see if the 
> client received the right packet) Or is there any other special 
> behavior besides that described in the NTPv4 document?
> 
> In case a client cannot permanently save records of the KOD packets it
> received before, is there any suggested behavior or solution to improve
> the sntp client's capabilities to deal with KOD packets then? 
> The last question is probably a bit strange. 
> 
> 
> Thanks for reading! I'd appreciate any input.
> 
> Max

See Section 7.4 of the current draft: 
http://www.ietf.org/internet-drafts/draft-ietf-ntp-ntpv4-proto-09.txt
which should tell you everything you need to know. If there is something 
you are still not clear about after you've read it please ask.

Danny