Fix bug in handling return value from decompress routine.

diff --git a/svr4/ppp_comp.c b/svr4/ppp_comp.c
index 4a33591503f6e484df04f70ee5eaf311acd3ed14..b4782675627e1c9e2ae3e7430a75bd2290ac5bbb 100644 (file)
--- a/svr4/ppp_comp.c
+++ b/svr4/ppp_comp.c
@@ -24,7 +24,7 @@
  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  * OR MODIFICATIONS.
  *
- * $Id: ppp_comp.c,v 1.3 1995/05/29 06:43:50 paulus Exp $
+ * $Id: ppp_comp.c,v 1.4 1995/07/11 06:42:27 paulus Exp $
  */
 
 /*
@@ -406,7 +406,7 @@ static int
 ppp_comp_wsrv(q)
     queue_t *q;
 {
-    mblk_t *mp, *cmp, *np;
+    mblk_t *mp, *cmp = NULL, *np;
     comp_state_t *cp;
     int len, proto, type;
     struct ip *ip;
@@ -558,7 +558,7 @@ ppp_comp_rsrv(q)
     queue_t *q;
 {
     int proto, rv, i;
-    mblk_t *mp, *dmp, *np;
+    mblk_t *mp, *dmp = NULL, *np;
     uchar_t *dp, *iphdr;
     comp_state_t *cp;
     int len, hlen, vjlen, iphlen;
@@ -644,26 +644,25 @@ ppp_comp_rsrv(q)
                && (cp->flags & CCP_DECOMP_RUN) && cp->rstate
                && (cp->flags & CCP_ERR) == 0) {
                rv = (*cp->rcomp->decompress)(cp->rstate, mp, &dmp);
-               if (dmp != NULL) {
+               switch (rv) {
+               case DECOMP_OK:
                    freemsg(mp);
                    mp = dmp;
-               } else {
-                   switch (rv) {
-                   case DECOMP_OK:
-                       /* no error, but no packet returned */
-                       freemsg(mp);
+                   if (mp == NULL) {
+                       /* no error, but no packet returned either. */
                        continue;
-                   case DECOMP_ERROR:
-                       cp->flags |= CCP_ERROR;
-                       ++cp->stats.ppp_ierrors;
-                       putctl1(q->q_next, M_CTL, PPPCTL_IERROR);
-                       break;
-                   case DECOMP_FATALERROR:
-                       cp->flags |= CCP_FATALERROR;
-                       ++cp->stats.ppp_ierrors;
-                       putctl1(q->q_next, M_CTL, PPPCTL_IERROR);
-                       break;
                    }
+                   break;
+               case DECOMP_ERROR:
+                   cp->flags |= CCP_ERROR;
+                   ++cp->stats.ppp_ierrors;
+                   putctl1(q->q_next, M_CTL, PPPCTL_IERROR);
+                   break;
+               case DECOMP_FATALERROR:
+                   cp->flags |= CCP_FATALERROR;
+                   ++cp->stats.ppp_ierrors;
+                   putctl1(q->q_next, M_CTL, PPPCTL_IERROR);
+                   break;
                }
            }
        } else if (cp->rstate && (cp->flags & CCP_DECOMP_RUN)) {