ICMPv6: Fix some truncation codes

[tcpdump] / ethertype.h

diff --git a/ethertype.h b/ethertype.h
index f38ec8e4f7881f377353fb7740bf1fb69a7a0b42..7719a6f043aae966a6cee44664b9b9745682435f 100644 (file)
--- 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.
  *