X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=modules%2Fppp_ahdlc.c;h=6d0ef485da9fd0af456131f010a76046a0e0ad8c;hb=07de73a331240b97d915c1851431a743449dd0f4;hp=5bc8e531fac84f90cf90613e6e87d470830aadec;hpb=0f52184692ed408f01280f233f3b2c8fafbc9b03;p=ppp.git

diff --git a/modules/ppp_ahdlc.c b/modules/ppp_ahdlc.c
index 5bc8e53..6d0ef48 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 1.6 1997/04/30 05:44:58 paulus Exp $
+ * $Id: ppp_ahdlc.c,v 1.10 1999/04/12 06:20:21 paulus Exp $
  */
 
 /*
@@ -190,6 +190,8 @@ MOD_CLOSE(ahdlc_close)
 	    state->cur_frame = 0;
 	}
 	FREE(q->q_ptr, sizeof(ahdlc_state_t));
+	q->q_ptr = NULL;
+	OTHERQ(q)->q_ptr = NULL;
 	--ppp_ahdlc_count;
     }
     return 0;
@@ -207,6 +209,12 @@ ahdlc_wput(q, mp)
     struct ppp_stats *psp;
 
     state = (ahdlc_state_t *) q->q_ptr;
+    if (state == 0) {
+	DPRINT("state == 0 in ahdlc_wput\n");
+	freemsg(mp);
+	return 0;
+    }
+
     switch (mp->b_datap->db_type) {
     case M_DATA:
 	/*
@@ -225,6 +233,10 @@ 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 */
@@ -236,6 +248,10 @@ 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;
@@ -318,6 +334,7 @@ ahdlc_wput(q, mp)
     default:
 	putnext(q, mp);
     }
+
     return 0;
 }
 
@@ -330,6 +347,13 @@ ahdlc_rput(q, mp)
     uchar_t *cp;
     ahdlc_state_t *state;
 
+    state = (ahdlc_state_t *) q->q_ptr;
+    if (state == 0) {
+	DPRINT("state == 0 in ahdlc_rput\n");
+	freemsg(mp);
+	return 0;
+    }
+
     switch (mp->b_datap->db_type) {
     case M_DATA:
 	unstuff_chars(q, mp);
@@ -337,7 +361,6 @@ ahdlc_rput(q, mp)
 	break;
 
     case M_HANGUP:
-	state = (ahdlc_state_t *) q->q_ptr;
 	if (state->cur_frame != 0) {
 	    /* XXX would like to send this up for debugging */
 	    freemsg(state->cur_frame);
@@ -387,12 +410,14 @@ 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
@@ -504,12 +529,6 @@ 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.
      */