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Unix/Linux 网络时间协议版本3 Network Time Protocol Version 3 (NTP) distribution for Unix systems

Replied: Tue, 18 Mar 1997 19:20:47 -0500
Replied: "Tom Javen <[e-mail]> [e-mail], [e-mail]"
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Date: Tue, 18 Mar 1997 21:24:44 +0200 (EET)
From: Tom Javen <[e-mail]>
To: [e-mail]
cc: [e-mail]
Subject: Re: pps
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On Tue, 18 Mar 1997 [e-mail] wrote:

> Tom,
> 
> Could be the "character" delivered by the gadget box does not
> match the charactere expected by the program. Ordinarily, we
> use the line discipline to capture the timestamp before it gets
> degraded by the OS latencies. This is not a NTP thing, just ugly
> serial ropeadope.
I assumed the magic characters were erase and kill. They are set to
^@ (null I think).
I even changed the character from my gadgetbox to * which is easily
seen by tip, but changeing the erase and kill characters to * did not
help. 
I had a small look at the source , to me it seems that the driver
needs the timestamp from the line discipline. 

I'll try to dig into the kernel and get the line discipline working.


Thanks again,
Tom



btw. here is a small patch for ntptrace (stops at reference clocks=any
host on 127 net even if stratum is higher than 1)


*** ntptrace.c  Thu Mar 13 16:06:20 1997
--- ntptrace.c.orig     Thu Mar 13 15:35:59 1997
***************
*** 485,492 ****
        printserver(server, stdout);
  
        /* End of recursion if we reach stratum 1 */
!       /* or at a reference clock,(a clock on 127 net) */
!       if ((server->stratum <= 1) || ((server->refid & 0xff) == 127 ))
                return(1);
  
        nextia.s_addr = server->refid;
--- 484,490 ----



-- 
Tom Javen                        phone [phone]
Instmel Oy                       fax   [phone]
Asianajajankatu 2                email [e-mail]
FIN-20780 Kaarina
Finland