X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/99f6d01b24d037f4d69ad098f085d98e3d1b73b4..230e0b85778df66f9cec62d13f0025c78cc0c9da:/ethertype.h

diff --git a/ethertype.h b/ethertype.h
index f38ec8e4..7719a6f0 100644
--- a/ethertype.h
+++ b/ethertype.h
@@ -19,6 +19,13 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
+/*
+ * Maximum length of the length field in an Ethernet header; any value
+ * greater than this is not a length value, so it's either an Ethernet
+ * type or an invalid value.
+ */
+#define	MAX_ETHERNET_LENGTH_VAL	1500
+
 /*
  * Ethernet types.
  *