X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=NeXT%2Fvjcompress.c;h=cbbab89d1f38ff3017532ed28e82866ac99129bf;hp=237b1ff78958717a1998c389c1bb95fa1acabd6b;hb=a83d9887bdc27bcbf285a3fd7964d2ddac52b1f5;hpb=7554d5fef3f478ca0f9c8911522d7c1783989eae

diff --git a/NeXT/vjcompress.c b/NeXT/vjcompress.c
index 237b1ff..cbbab89 100644
--- a/NeXT/vjcompress.c
+++ b/NeXT/vjcompress.c
@@ -26,16 +26,16 @@
  */
 
 /*
- * This version is used under SunOS 4.x, DEC Alpha OSF/1, AIX 4.x,
+ * This version is used under SunOS 4.x, Digital UNIX, 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 1.3 1997/04/30 05:39:44 paulus Exp $
  */
 
 #include <sys/types.h>
 #include <sys/param.h>
 
-#ifdef __svr4__
+#ifdef SVR4
 #ifndef __GNUC__
 #include <sys/byteorder.h>	/* for ntohl, etc. */
 #else
@@ -49,7 +49,7 @@
 #endif
 #include <netinet/in.h>
 
-#ifdef __aix4__
+#ifdef AIX4
 #define _NETINET_IN_SYSTM_H_
 typedef u_long  n_long;
 #else
@@ -430,8 +430,9 @@ vj_uncompress_err(comp)
  * "Uncompress" a packet of type TYPE_UNCOMPRESSED_TCP.
  */
 int
-vj_uncompress_uncomp(buf, comp)
+vj_uncompress_uncomp(buf, buflen, comp)
     u_char *buf;
+    int buflen;
     struct vjcompress *comp;
 {
     register u_int hlen;
@@ -439,7 +440,12 @@ 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 +453,6 @@ 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);