On Thu, May 14, 2009 at 04:59:26PM +0200, Thierry Deval wrote:
> Nice trick.
> Though, wouldn't we break the cmsg loop once the SCM_TIMESTAMP is found ?
but that's what we want! (:
we do not parse any other control messages.
> + for (cmsg = CMSG_FIRSTHDR(&somsg); cmsg != NULL;
> + cmsg = CMSG_NXTHDR(&somsg, cmsg)) {
> + if (cmsg->cmsg_level == SOL_SOCKET &&
> + cmsg->cmsg_type == SCM_TIMESTAMP) {
> + memcpy(&tv1, CMSG_DATA(cmsg), sizeof tv1);
> + T4 += tv1.tv_sec + JAN_1970 + 1.0e-6 * tv1.tv_usec;
> ++ break;
> + }
> + }
>
> Michael Shalayeff wrote:
> >re
> >this diff converts ntpd to use socket timestamps (SO_TIMESTAMP sockopt)
> >for received packets. this seems to reduce deviation by a factor of 5.
> >code pohnz0red from bgpd and others using recvmsg.
> >this has ran on a number of servers already (and still should apply
> >to original ntpd code ;) but surely can use another look.
> >cu
> >
>
--
paranoic mickey (my employers have changed but, the name has remained)
