Add check for vlan-encap=802.1q
diff --git a/extensions/ebt_vlan.c b/extensions/ebt_vlan.c
index 382961f..297b61b 100644
--- a/extensions/ebt_vlan.c
+++ b/extensions/ebt_vlan.c
@@ -228,6 +228,16 @@
print_error
("For use 802.1Q extension the protocol must be specified as 802_1Q");
/*
+ * Check if specified vlan-encap=0x8100 (802.1Q Frame)
+ * when vlan-encap specified.
+ */
+ if (GET_BITMASK (EBT_VLAN_ENCAP)) {
+ if (vlaninfo->encap==htons(0x8100))
+ print_error
+ ("Encapsulated frame type can not be 802.1Q (0x8100)");
+ }
+
+ /*
* Check if specified vlan-id=0 (priority-tagged frame condition)
* when vlan-prio was specified.
*/