[src/trunk]: src/sys/net Fix typo, and add a comment about MPLS.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ef57e7c6cde5
branches:  trunk
changeset: 359479:ef57e7c6cde5
user:      maxv <maxv%NetBSD.org@localhost>
date:      Mon Feb 12 12:17:38 2018 +0000

description:
Fix typo, and add a comment about MPLS.

diffstat:

 sys/net/if_ethersubr.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (37 lines):

diff -r d594e31cc43e -r ef57e7c6cde5 sys/net/if_ethersubr.c
--- a/sys/net/if_ethersubr.c    Mon Feb 12 11:14:15 2018 +0000
+++ b/sys/net/if_ethersubr.c    Mon Feb 12 12:17:38 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_ethersubr.c,v 1.257 2018/01/19 12:31:27 nakayama Exp $      */
+/*     $NetBSD: if_ethersubr.c,v 1.258 2018/02/12 12:17:38 maxv Exp $  */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -61,7 +61,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.257 2018/01/19 12:31:27 nakayama Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.258 2018/02/12 12:17:38 maxv Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -260,7 +260,7 @@
                        void *tha = ar_tha(ah);
 
                        if (tha == NULL) {
-                               /* fake with ARPHDR_IEEE1394 */
+                               /* fake with ARPHRD_IEEE1394 */
                                m_freem(m);
                                return 0;
                        }
@@ -606,7 +606,8 @@
        }
 
        /*
-        * Determine if the packet is within its size limits.
+        * Determine if the packet is within its size limits. For MPLS the
+        * header length is variable, so we skip the check.
         */
        if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len >
            ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) {