From 7e20c7add6fbd44b2164c1501d1c47f6258b5251 Mon Sep 17 00:00:00 2001
From: julian <julian@FreeBSD.org>
Date: Sun, 14 Jun 1998 20:58:17 +0000
Subject: Try narrow down the culprit sending undefined packet types through
 the loopback

---
 sys/net/if_ethersubr.c  |  9 ++++-----
 sys/net/if_fddisubr.c   |  6 ++++--
 sys/net/if_loop.c       | 15 ++++++++++++++-
 sys/netinet/ip_output.c | 10 +++++++++-
 4 files changed, 31 insertions(+), 9 deletions(-)

(limited to 'sys')

diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c
index 97b9847..e523232 100644
--- a/sys/net/if_ethersubr.c
+++ b/sys/net/if_ethersubr.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)if_ethersubr.c	8.1 (Berkeley) 6/10/93
- * $Id: if_ethersubr.c,v 1.49 1998/06/12 03:48:07 julian Exp $
+ * $Id: if_ethersubr.c,v 1.50 1998/06/13 02:27:10 julian Exp $
  */
 
 #include "opt_atalk.h"
@@ -357,16 +357,15 @@ ether_output(ifp, m0, dst, rt0)
 	 * on the wire). However, we don't do that here for security
 	 * reasons and compatibility with the original behavior.
 	 */
-	if (ifp->if_flags & IFF_SIMPLEX) {
+	if ((ifp->if_flags & IFF_SIMPLEX) &&
+	   (loop_copy != -1)) {
 		if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
 			struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 
 			(void) if_simloop(ifp, n, dst, ETHER_HDR_LEN);
 		} else if (bcmp(eh->ether_dhost,
 		    eh->ether_shost, ETHER_ADDR_LEN) == 0) {
-			if (loop_copy != -1)
-				(void) if_simloop(ifp, m, dst,
-							ETHER_HDR_LEN);
+			(void) if_simloop(ifp, m, dst, ETHER_HDR_LEN);
 			return(0);	/* XXX */
 		}
 	}
diff --git a/sys/net/if_fddisubr.c b/sys/net/if_fddisubr.c
index ee4e847..823bf4d 100644
--- a/sys/net/if_fddisubr.c
+++ b/sys/net/if_fddisubr.c
@@ -33,7 +33,7 @@
  * SUCH DAMAGE.
  *
  *	from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp
- * $Id: if_fddisubr.c,v 1.30 1998/05/21 00:33:16 dg Exp $
+ * $Id: if_fddisubr.c,v 1.31 1998/06/12 03:48:08 julian Exp $
  */
 
 #include "opt_atalk.h"
@@ -301,6 +301,7 @@ fddi_output(ifp, m0, dst, rt0)
 	case AF_UNSPEC:
 	{
 		struct ether_header *eh;
+		loop_copy = -1;
 		eh = (struct ether_header *)dst->sa_data;
  		(void)memcpy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst));
 		if (*edst & 1)
@@ -386,7 +387,8 @@ fddi_output(ifp, m0, dst, rt0)
 	 * on the wire). However, we don't do that here for security
 	 * reasons and compatibility with the original behavior.
 	 */
-	if (ifp->if_flags & IFF_SIMPLEX) {
+	if ((ifp->if_flags & IFF_SIMPLEX) &&
+	   (loop_copy != -1)) {
 		if ((m->m_flags & M_BCAST) || loop_copy) {
 			struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 
diff --git a/sys/net/if_loop.c b/sys/net/if_loop.c
index ee77758..9153923 100644
--- a/sys/net/if_loop.c
+++ b/sys/net/if_loop.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)if_loop.c	8.1 (Berkeley) 6/10/93
- * $Id: if_loop.c,v 1.33 1998/06/12 03:48:09 julian Exp $
+ * $Id: if_loop.c,v 1.34 1998/06/12 20:03:26 julian Exp $
  */
 
 /*
@@ -144,6 +144,19 @@ looutput(ifp, m, dst, rt)
 	}
 	ifp->if_opackets++;
 	ifp->if_obytes += m->m_pkthdr.len;
+#if 1	/* XXX */
+	switch (dst->sa_family) {
+	case AF_INET:
+	case AF_IPX:
+	case AF_NS:
+	case AF_ISO:
+	case AF_APPLETALK:
+	default:
+		printf("looutput: af=%d unexpected", dst->sa_family);
+		m_freem(m);
+		return (EAFNOSUPPORT);
+	}
+#endif
 	return(if_simloop(ifp, m, dst, 0));
 }
 
diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c
index 0ffc630..03aa4b6 100644
--- a/sys/netinet/ip_output.c
+++ b/sys/netinet/ip_output.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ip_output.c	8.3 (Berkeley) 1/21/94
- *	$Id: ip_output.c,v 1.71 1998/06/06 21:49:17 julian Exp $
+ *	$Id: ip_output.c,v 1.72 1998/06/12 03:48:19 julian Exp $
  */
 
 #define _IP_VHL
@@ -1322,6 +1322,14 @@ ip_mloopback(ifp, m, dst, hlen)
 		 * packet.  For the moment, we'll err on the side
 		 * of safety by using if_simloop().
 		 */
+#if 1 /* XXX */
+		if (dst->sin_family != AF_INET) {
+			printf("ip_mloopback: bad address family %d\n");
+						dst->sin_family);
+			dst->sin_family = AF_INET;
+		}
+#endif
+
 #ifdef notdef
 		copym->m_pkthdr.rcvif = ifp;
 		ip_input(copym);
-- 
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