X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=modules%2Fppp_ahdlc.c;h=cfde35d296ddac3e3f7d25c231005549b9bd54c5;hb=699e067418e4de59d75c0de252b1bc066d4fe8c0;hp=79a2d05d870b33f860cc597f66724ff89ee456b3;hpb=cac90e238d9c18c513cf0d45dfdd1e217df2a176;p=ppp.git

diff --git a/modules/ppp_ahdlc.c b/modules/ppp_ahdlc.c
index 79a2d05..cfde35d 100644
--- a/modules/ppp_ahdlc.c
+++ b/modules/ppp_ahdlc.c
@@ -24,7 +24,7 @@
  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  * OR MODIFICATIONS.
  *
- * $Id: ppp_ahdlc.c,v 1.5 1997/03/04 03:31:51 paulus Exp $
+ * $Id: ppp_ahdlc.c,v 1.8 1998/05/04 06:11:50 paulus Exp $
  */
 
 /*
@@ -42,6 +42,9 @@
 #include <sys/ddi.h>
 #else
 #include <sys/user.h>
+#ifdef __osf__
+#include <sys/cmn_err.h>
+#endif
 #endif /* SVR4 */
 
 #include <net/ppp_defs.h>
@@ -168,7 +171,7 @@ MOD_OPEN(ahdlc_open)
 	WR(q)->q_ptr = (caddr_t) sp;
 	sp->xaccm[0] = ~0;
 	sp->xaccm[3] = 0x60000000;
-	sp->mru = 1500;
+	sp->mru = PPP_MRU;
 	++ppp_ahdlc_count;
 	qprocson(q);
     }
@@ -222,6 +225,10 @@ ahdlc_wput(q, mp)
 	    if (iop->ioc_count < sizeof(u_int32_t)
 		|| iop->ioc_count > sizeof(ext_accm))
 		break;
+	    if (mp->b_cont == 0) {
+		DPRINT1("ahdlc_wput/%d: PPPIO_XACCM b_cont = 0!\n", state->unit);
+		break;
+	    }
 	    bcopy((caddr_t)mp->b_cont->b_rptr, (caddr_t)state->xaccm,
 		  iop->ioc_count);
 	    state->xaccm[2] &= ~0x40000000;	/* don't escape 0x5e */
@@ -233,6 +240,10 @@ ahdlc_wput(q, mp)
 	case PPPIO_RACCM:
 	    if (iop->ioc_count != sizeof(u_int32_t))
 		break;
+	    if (mp->b_cont == 0) {
+		DPRINT1("ahdlc_wput/%d: PPPIO_RACCM b_cont = 0!\n", state->unit);
+		break;
+	    }
 	    bcopy((caddr_t)mp->b_cont->b_rptr, (caddr_t)&state->raccm,
 		  sizeof(u_int32_t));
 	    iop->ioc_count = 0;
@@ -384,12 +395,14 @@ stuff_frame(q, mp)
 	goto bomb;
 
     /*
-     * Put in an initial flag for now.  We'll remove it later
-     * if we decide we don't need it.
+     * Put in an initial flag, unless the serial driver currently has
+     * packets still to be transmitted in its queue.
      */
     dp = op->b_wptr;
-    *dp++ = PPP_FLAG;
-    --olen;
+    if (qsize(q->q_next) == 0) {
+	*dp++ = PPP_FLAG;
+	--olen;
+    }
 
     /*
      * For LCP packets with code values between 1 and 7 (Conf-Req
@@ -501,12 +514,6 @@ stuff_frame(q, mp)
     *dp++ = PPP_FLAG;
     op->b_wptr = dp;
 
-    /*
-     * Remove the initial flag, if possible.
-     */
-    if (qsize(q->q_next) > 0)
-	++omsg->b_rptr;
-
     /*
      * Update statistics.
      */