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From: nnd@itfs.nsk.su
To: current@freebsd.org
Subject: PPP - why set CLOCAL for server ('-direct' mode) ?
Date: 10 Sep 1997 12:39:11 GMT
Message-ID: <5v64df$gsa@news.itfs.nsk.su>
Sender: owner-freebsd-current@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

	I try to construct a 'dial-in-access-server'
from IBM PC-compatible with Cyclades' Cyclom-16YeP multiport
board, some cheap modems and FreeBSD-3.0.

	I've discover that if I start '/usr/sbin/ppp' as:

/usr/sbin/ppp -direct user-label

(from small script setted as as user's shell)
then it sets 'CLOCAL' flag for modem and
as a result 'ppp' process does'nt received 'SIGHUP'
on modem's carrier drop.

	What is the purpose of such ('CLOCAL') setting
in '-direct' mode ?

	N.Dudorov

P.S. If this is just an oversight I append a patch for
/usr/src/usr.sbin/ppp/modem.c ;-)

--- modem.c.ORIG	Wed Sep 10 13:54:34 1997
+++ modem.c	Wed Sep 10 13:55:43 1997
@@ -566,10 +566,9 @@
   }
   tcgetattr(modem, &rstio);
   cfmakeraw(&rstio);
+  if (!(mode & MODE_DIRECT)) rstio.c_cflag |= CLOCAL;
   if (VarCtsRts)
-    rstio.c_cflag |= CLOCAL | CCTS_OFLOW | CRTS_IFLOW;
-  else
-    rstio.c_cflag |= CLOCAL;
+    rstio.c_cflag |= CCTS_OFLOW | CRTS_IFLOW;
 
   if (!(mode & MODE_DEDICATED))
     rstio.c_cflag |= HUPCL;