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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

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Date: Thu, 27 Mar 1997 16:44:29 +0200
Message-Id: <[e-mail]>
From: Juha Takala <[e-mail]>
To: [e-mail]
Subject: xntp3-5.89 on Intel Linux with Trimble TSIP
Reply-to: [e-mail]
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Content-Type: text/plain; charset=US-ASCII


Hi,

I have had xntp running on my PC running Linux, for a long
time already.  Last october or such, I got a Trimble Acutime
II GPS receiver and atatched that to one serial port.  At
that time I worked out the byte order dependencies in xntpd
to make it understand TSIP.  I also sent my diffs to one of
xntpd maintainers (as I understood) to Germany.

After that time, there has been two new releases of xntpd,
but I haven't seen these diffs included into the distributed
versions.  I don't know the reason.  Maybe he wasn't one of
the xntpd development team.  Now I'm sending these diffs to
you.  If you are not the correct person, then maybe you can
tell me who is, or forward these diffs.

(You may want to drop those '#if 0 ... #else' parts away
completely, I left them so that the file shows what has been
changed).

Thank you.

	-juha

*** libparse/clk_trimtsip.c~	Tue Jan 21 05:02:06 1997
--- libparse/clk_trimtsip.c	Thu Mar 27 15:59:55 1997
***************
*** 453,462 ****
--- 453,469 ----
  getflt(bp)
    u_char *bp;
  {
+ #ifdef XNTP_BIG_ENDIAN
    uval.bd[0] = *bp++;
    uval.bd[1] = *bp++;
    uval.bd[2] = *bp++;
    uval.bd[3] = *bp;
+ #else  /* ! XNTP_BIG_ENDIAN */
+   uval.bd[3] = *bp++;
+   uval.bd[2] = *bp++;
+   uval.bd[1] = *bp++;
+   uval.bd[0] = *bp;
+ #endif /* ! XNTP_BIG_ENDIAN */
    return uval.fv;
  }
  
***************
*** 464,469 ****
--- 471,477 ----
  getdbl(bp)
    u_char *bp;
  {
+ #ifdef XNTP_BIG_ENDIAN
    uval.bd[0] = *bp++;
    uval.bd[1] = *bp++;
    uval.bd[2] = *bp++;
***************
*** 472,480 ****
--- 480,499 ----
    uval.bd[5] = *bp++;
    uval.bd[6] = *bp++;
    uval.bd[7] = *bp;
+ #else  /* ! XNTP_BIG_ENDIAN */
+   uval.bd[0] = *bp++;
+   uval.bd[1] = *bp++;
+   uval.bd[2] = *bp++;
+   uval.bd[3] = *bp++;
+   uval.bd[4] = *bp++;
+   uval.bd[5] = *bp++;
+   uval.bd[6] = *bp++;
+   uval.bd[7] = *bp;
+ #endif /* ! XNTP_BIG_ENDIAN */
    return uval.dv;
  }
  
+ #if 0
  static int
  getint(bp)
    u_char *bp;
***************
*** 487,492 ****
--- 506,522 ----
      uval.bd[0] = uval.bd[1] = 0;
    return uval.iv;
  }
+ #else  /* !0 */
+ static int
+ getint(bp)
+      u_char *bp;
+ {
+ 	if (*bp & 0x80)
+ 		return ((~0xffff) | (*bp<<8) | *(bp+1));
+ 	else
+ 		return ((*bp<<8) | *(bp+1));
+ }
+ #endif /* !0 */
  
  #else /* not (REFCLOCK && PARSE && CLOCK_TRIMTSIP && !PARSESTREAM) */
  int clk_trimtsip_bs;
*** xntpd/refclock_parse.c~	Tue Jan 21 05:37:28 1997
--- xntpd/refclock_parse.c	Thu Mar 27 15:59:19 1997
***************
*** 4125,4133 ****
--- 4125,4139 ----
    struct txbuf *buf;
    int a;
  {
+ #if 0
    uval.iv = a;
    sendbyte(buf, uval.bd[2]);
    sendbyte(buf, uval.bd[3]);
+ #else
+   /* send 16bit int, msbyte first */
+   sendbyte(buf, (a>>8) & 0xff);
+   sendbyte(buf, a & 0xff);
+ #endif
  }
  
  void
***************
*** 4138,4144 ****
--- 4144,4154 ----
    int i;
  
    uval.fv = a;
+ #ifdef XNTP_BIG_ENDIAN
    for (i=0; i<=3; i++)
+ #else
+   for (i=3; i>=0; i--)
+ #endif
      sendbyte(buf, uval.bd[i]);
  }