X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=netbsd-1.1%2Fppp_tty.c;h=d24b9907bfdb7654f7c7a625e5719db9fef00e51;hp=37b1739bccfe4fed5d48b0ac1d74ca31c175eb42;hb=7f417198cd0911ddbd890565298a4a400e09cae2;hpb=96e6e506a6e0b6213fc1f33528a5fff85e014772

diff --git a/netbsd-1.1/ppp_tty.c b/netbsd-1.1/ppp_tty.c
index 37b1739..d24b990 100644
--- a/netbsd-1.1/ppp_tty.c
+++ b/netbsd-1.1/ppp_tty.c
@@ -1,23 +1,46 @@
-/*	$Id: ppp_tty.c,v 1.3 1996/07/01 01:04:11 paulus Exp $	*/
+/*	$Id: ppp_tty.c,v 1.5 2002/12/06 12:03:44 paulus Exp $	*/
 
 /*
  * ppp_tty.c - Point-to-Point Protocol (PPP) driver for asynchronous
  * 	       tty devices.
  *
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
  *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University.  The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For permission or any legal
+ *    details, please contact
+ *      Office of Technology Transfer
+ *      Carnegie Mellon University
+ *      5000 Forbes Avenue
+ *      Pittsburgh, PA  15213-3890
+ *      (412) 268-4387, fax: (412) 268-7395
+ *      tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by Computing Services
+ *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  *
  * Drew D. Perkins
  * Carnegie Mellon University
@@ -104,6 +127,9 @@
 #include <net/slcompress.h>
 #endif
 
+#ifdef PPP_FILTER
+#include <net/bpf.h>
+#endif
 #include <net/ppp_defs.h>
 #include <net/if_ppp.h>
 #include <net/if_pppvar.h>
@@ -115,7 +141,7 @@ int	pppwrite __P((struct tty *tp, struct uio *uio, int flag));
 int	ppptioctl __P((struct tty *tp, u_long cmd, caddr_t data, int flag,
 		       struct proc *));
 int	pppinput __P((int c, struct tty *tp));
-int	pppstart __P((struct tty *tp));
+int	pppstart __P((struct tty *tp, int));
 
 static u_int16_t pppfcs __P((u_int16_t fcs, u_char *cp, int len));
 static void	pppasyncstart __P((struct ppp_softc *));
@@ -568,8 +594,10 @@ pppasyncstart(sc)
 		 */
 		if (len) {
 		    s = spltty();
-		    if (putc(PPP_ESCAPE, &tp->t_outq))
+		    if (putc(PPP_ESCAPE, &tp->t_outq)) {
+			splx(s);
 			break;
+		    }
 		    if (putc(*start ^ PPP_TRANS, &tp->t_outq)) {
 			(void) unputc(&tp->t_outq);
 			splx(s);
@@ -658,7 +686,7 @@ pppasyncstart(sc)
 
     /* Call pppstart to start output again if necessary. */
     s = spltty();
-    pppstart(tp);
+    pppstart(tp, 0);
 
     /*
      * This timeout is needed for operation on a pseudo-tty,
@@ -699,8 +727,9 @@ pppasyncctlp(sc)
  * Called at spltty or higher.
  */
 int
-pppstart(tp)
+pppstart(tp, force)
     register struct tty *tp;
+    int force;
 {
     register struct ppp_softc *sc = (struct ppp_softc *) tp->t_sc;
 
@@ -716,8 +745,9 @@ pppstart(tp)
      * or been disconnected from the ppp unit, then tell if_ppp.c that
      * we need more output.
      */
-    if (CCOUNT(&tp->t_outq) < PPP_LOWAT
-	&& !((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0)
+    if (CCOUNT(&tp->t_outq) >= PPP_LOWAT && !force)
+	return 0;
+    if (!((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0)
 	&& sc != NULL && tp == (struct tty *) sc->sc_devp) {
 	ppp_restart(sc);
     }
@@ -738,7 +768,7 @@ ppp_timeout(x)
 
     s = spltty();
     sc->sc_flags &= ~SC_TIMEOUT;
-    pppstart(tp);
+    pppstart(tp, 1);
     splx(s);
 }