copy new iv only if existant

diff --git a/sys/netinet/ip_espdesmd5.c b/sys/netinet/ip_espdesmd5.c
index 24e3789..bf10750 100644 (file)
--- a/sys/netinet/ip_espdesmd5.c
+++ b/sys/netinet/ip_espdesmd5.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ip_espdesmd5.c,v 1.3 1997/02/26 20:53:18 deraadt Exp $        */
+/*     $OpenBSD: ip_espdesmd5.c,v 1.4 1997/03/28 09:48:37 provos Exp $ */
 
 /*
  * The author of this code is John Ioannidis, ji@tla.org,
@@ -713,7 +713,8 @@ espdesmd5_output(struct mbuf *m, struct sockaddr_encap *gw, struct tdb *tdb, str
          printf("espdesmd5_output: almost done now\n");
 #endif
 
-       bcopy(iv, xd->edx_iv, ESPDESMD5_IVS); /* New IV */
+       if (xd->edx_ivlen)
+         bcopy(iv, xd->edx_iv, ESPDESMD5_IVS); /* New IV */
 
        /* Fix the length and the next protocol, copy back and off we go */
        ipo.ip_len = htons(sizeof (struct ip) + ohlen + rlen + padding +