update to 2.3 based on netbsd stuff

[ppp.git] / NeXT / vjcompress.c

diff --git a/NeXT/vjcompress.c b/NeXT/vjcompress.c
index 237b1ff78958717a1998c389c1bb95fa1acabd6b..0a0a29a3929dabd9a2a963c0b70d4c6e55b5a6d1 100644 (file)
--- a/NeXT/vjcompress.c
+++ b/NeXT/vjcompress.c
@@ -29,7 +29,7 @@
  * This version is used under SunOS 4.x, DEC Alpha OSF/1, AIX 4.x,
  * and SVR4 systems including Solaris 2.
  *
- * $Id: vjcompress.c,v 1.1 1995/12/18 03:30:20 paulus Exp $
+ * $Id: vjcompress.c,v 1.2 1996/05/24 07:04:06 paulus Exp $
  */
 
 #include <sys/types.h>
@@ -439,7 +439,12 @@ vj_uncompress_uncomp(buf, comp)
     register struct ip *ip;
 
     ip = (struct ip *) buf;
-    if (ip->ip_p >= MAX_STATES) {
+    hlen = getip_hl(*ip) << 2;
+    if (ip->ip_p >= MAX_STATES
+       || hlen + sizeof(struct tcphdr) > buflen
+       || (hlen += getth_off(*((struct tcphdr *)&((char *)ip)[hlen])) << 2)
+           > buflen
+       || hlen > MAX_HDR) {
        comp->flags |= VJF_TOSS;
        INCR(vjs_errorin);
        return (0);
@@ -447,9 +452,6 @@ vj_uncompress_uncomp(buf, comp)
     cs = &comp->rstate[comp->last_recv = ip->ip_p];
     comp->flags &=~ VJF_TOSS;
     ip->ip_p = IPPROTO_TCP;
-    hlen = getip_hl(*ip);
-    hlen += getth_off(*((struct tcphdr *)&((int *)ip)[hlen]));
-    hlen <<= 2;
     BCOPY(ip, &cs->cs_ip, hlen);
     cs->cs_hlen = hlen;
     INCR(vjs_uncompressedin);