36 lines
916 B
Diff
36 lines
916 B
Diff
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From 7a1862a392038407371d6889e49b06848efa637f Mon Sep 17 00:00:00 2001
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From: Jiri Popelka <jpopelka@redhat.com>
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Date: Thu, 3 Sep 2015 18:25:42 +0200
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Subject: [PATCH] VLAN ID is only bottom 12-bits of TCI
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The upper 4 bits contain metadata used for quality of service
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management.
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TCI(16b) = PCP(3b) + DEI(1b) + VID(12b)
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TCI = Tag control information
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PCP = Priority code point
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DEI = Drop eligible indicator
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VID = VLAN identifier
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---
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common/lpf.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/common/lpf.c b/common/lpf.c
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index 7889b6b..4c835e6 100644
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--- a/common/lpf.c
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+++ b/common/lpf.c
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@@ -425,7 +425,8 @@ ssize_t receive_packet (interface, buf, len, from, hfrom)
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/* Discard packets with stripped vlan id */
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#ifdef VLAN_TCI_PRESENT
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- if (aux->tp_vlan_tci != 0)
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+ /* VLAN ID is only bottom 12-bits of TCI */
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+ if (aux->tp_vlan_tci & 0x0fff)
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return 0;
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#endif
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--
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2.5.0
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