Module Name: src
Committed By: roy
Date: Tue Apr 28 15:12:28 UTC 2020
Modified Files:
src/sys/netinet6: nd6.c
Log Message:
inet6: Ensure that route MTU is guarded by ARC_PHDS_MAXMTU
This mirrors the ARP behavior for ARCnet interfaces based on current
kernel RA handling.
To generate a diff of this commit:
cvs rdiff -u -r1.269 -r1.270 src/sys/netinet6/nd6.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/netinet6/nd6.c
diff -u src/sys/netinet6/nd6.c:1.269 src/sys/netinet6/nd6.c:1.270
--- src/sys/netinet6/nd6.c:1.269 Sun Apr 12 12:13:52 2020
+++ src/sys/netinet6/nd6.c Tue Apr 28 15:12:28 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: nd6.c,v 1.269 2020/04/12 12:13:52 roy Exp $ */
+/* $NetBSD: nd6.c,v 1.270 2020/04/28 15:12:28 roy Exp $ */
/* $KAME: nd6.c,v 1.279 2002/06/08 11:16:51 itojun Exp $ */
/*
@@ -31,7 +31,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nd6.c,v 1.269 2020/04/12 12:13:52 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nd6.c,v 1.270 2020/04/28 15:12:28 roy Exp $");
#ifdef _KERNEL_OPT
#include "opt_net_mpsafe.h"
@@ -1462,8 +1462,22 @@ nd6_rtrequest(int req, struct rtentry *r
return;
}
- if ((rt->rt_flags & RTF_GATEWAY) != 0)
+ if ((rt->rt_flags & RTF_GATEWAY) != 0) {
+ if (req != RTM_ADD)
+ return;
+ /*
+ * linklayers with particular MTU limitation.
+ */
+ switch(ifp->if_type) {
+#if NARCNET > 0
+ case IFT_ARCNET:
+ if (rt->rt_rmx.rmx_mtu > ARC_PHDS_MAXMTU) /* RFC2497 */
+ rt->rt_rmx.rmx_mtu = ARC_PHDS_MAXMTU;
+ break;
+#endif
+ }
return;
+ }
if (nd6_need_cache(ifp) == 0 && (rt->rt_flags & RTF_HOST) == 0) {
RT_DPRINTF("rt_getkey(rt) = %p\n", rt_getkey(rt));
