From cb21bc35f7cac6bc9e833510e48e9533cc4d0845 Mon Sep 17 00:00:00 2001
From: Michal Kubecek <mkubecek@suse.cz>
Date: Wed, 19 Aug 2015 15:08:06 +0200
Subject: Recognize 802.1ad nested VLAN tag in vlan filter.

In addition to ETHERTYPE_8021Q (0x8100) and ETHERTYPE_8021QINQ (0x9100),
recognize also ETHERTYPE_8021AD (0x88a8) as a VLAN tag. This is defined
as S-Tag (Service tag) by 802.1ad.
---
 gencode.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'gencode.c')

diff --git a/gencode.c b/gencode.c
index 33bcb484..552c40a1 100644
--- a/gencode.c
+++ b/gencode.c
@@ -7915,6 +7915,9 @@ gen_vlan_no_bpf_extensions(int vlan_num)
 
         /* check for VLAN, including QinQ */
         b0 = gen_linktype(ETHERTYPE_8021Q);
+        b1 = gen_linktype(ETHERTYPE_8021AD);
+        gen_or(b0,b1);
+        b0 = b1;
         b1 = gen_linktype(ETHERTYPE_8021QINQ);
         gen_or(b0,b1);
         b0 = b1;
-- 
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