From 7a1862a392038407371d6889e49b06848efa637f Mon Sep 17 00:00:00 2001

From: Jiri Popelka <jpopelka@redhat.com>

Date: Thu, 3 Sep 2015 18:25:42 +0200

Subject: [PATCH] VLAN ID is only bottom 12-bits of TCI

The upper 4 bits contain metadata used for quality of service

management.

TCI(16b) = PCP(3b) + DEI(1b) + VID(12b)

TCI = Tag control information

PCP = Priority code point

DEI = Drop eligible indicator

VID = VLAN identifier

---

 common/lpf.c | 3 ++-

 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/lpf.c b/common/lpf.c

index 7889b6b..4c835e6 100644

--- a/common/lpf.c

+++ b/common/lpf.c

@@ -425,7 +425,8 @@ ssize_t receive_packet (interface, buf, len, from, hfrom)

 			/* Discard packets with stripped vlan id */

 #ifdef VLAN_TCI_PRESENT

-			if (aux->tp_vlan_tci != 0)

+			/* VLAN ID is only bottom 12-bits of TCI */

+			if (aux->tp_vlan_tci & 0x0fff)

 				return 0;

 #endif

-- 

2.5.0