Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/netinet/udp_usrreq.c,v
rcsdiff: /ftp/cvs/cvsroot/src/sys/netinet/udp_usrreq.c,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.28
retrieving revision 1.29.2.1
diff -u -p -r1.28 -r1.29.2.1
--- src/sys/netinet/udp_usrreq.c	1996/03/16 23:54:03	1.28
+++ src/sys/netinet/udp_usrreq.c	1996/11/10 21:57:55	1.29.2.1
@@ -1,4 +1,4 @@
-/*	$NetBSD: udp_usrreq.c,v 1.28 1996/03/16 23:54:03 christos Exp $	*/
+/*	$NetBSD: udp_usrreq.c,v 1.29.2.1 1996/11/10 21:57:55 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993
@@ -162,7 +162,7 @@ udp_input(m, va_alist)
 	/*
 	 * Checksum extended UDP header and data.
 	 */
-	if (udpcksum && uh->uh_sum) {
+	if (uh->uh_sum) {
 		bzero(((struct ipovly *)ip)->ih_x1,
 		    sizeof ((struct ipovly *)ip)->ih_x1);
 		((struct ipovly *)ip)->ih_len = uh->uh_ulen;
@@ -462,6 +462,15 @@ udp_output(m, va_alist)
 	}
 
 	/*
+	 * Compute the packet length of the IP header, and
+	 * punt if the length looks bogus.
+	 */
+	if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
+		error = EMSGSIZE;
+		goto release;
+	}
+
+	/*
 	 * Fill in mbuf with extended UDP header
 	 * and addresses and length put into network format.
 	 */