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来自「Unix/Linux 网络时间协议版本3 Network Time Proto」· 代码 · 共 42 行

Replied: Mon, 02 Jun 1997 21:14:39 -0400
Replied: "Juha Sarlin <[e-mail]> [e-mail]"
Replied: Mon, 02 Jun 1997 18:29:41 -0400
Replied: "Juha Sarlin <[e-mail]> [e-mail]"
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Date: Fri, 30 May 1997 21:01:24 +0200
From: Juha Sarlin <[e-mail]>
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Subject: Another cutout fix for xntp3-5.90
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The loopfilter shouldn't try to adjust when abs(offset) >= .5 s,
because the fractional part of offset is used as a signed value and
a fraction >= .5 s has a reversed sign bit.

Here is a fix:

*** xntpd/ntp_loopfilter.c~	Fri May 30 20:24:17 1997
--- xntpd/ntp_loopfilter.c	Fri May 30 20:30:19 1997
***************
*** 239,242 ****
  	 */
! 	} else if (ftmp.l_ui > CLOCK_MAX_I || (ftmp.l_ui == CLOCK_MAX_I
! 	    && ftmp.l_uf >= CLOCK_MAX_F && !cutout)) {
  		tc_counter = 0;
--- 239,243 ----
  	 */
! 	} else if (ftmp.l_ui > CLOCK_MAX_I || ftmp.l_f < 0
! 		   || (ftmp.l_ui == CLOCK_MAX_I && ftmp.l_uf >= CLOCK_MAX_F
! 		       && !cutout)) {
  		tc_counter = 0;