exit with an appropriate value to indicate what happened

[ppp.git] / modules / ppp_ahdlc.c

diff --git a/modules/ppp_ahdlc.c b/modules/ppp_ahdlc.c
index 5bc8e531fac84f90cf90613e6e87d470830aadec..6d0ef485da9fd0af456131f010a76046a0e0ad8c 100644 (file)
--- 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.
      */