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.

1 files changed, 3 insertions, 0 deletions

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;