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49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
/* Copyright (C) 2021 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Jeff Lucovsky <jeff@lucovsky.org>
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*/
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#ifndef __DECODE_VNTAG_H__
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#define __DECODE_VNTAG_H__
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/* https://www.ieee802.org/1/files/public/docs2009/new-pelissier-vntag-seminar-0508.pdf */
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/** VNTag macros to access VNTag direction, dst vif_id, dest, looped, version, src vif_id **/
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#define GET_VNTAG_DIR(vntagh) ((SCNtohl((vntagh)->tag) & 0x80000000) >> 31)
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#define GET_VNTAG_PTR(vntagh) ((SCNtohl((vntagh)->tag) & 0x40000000) >> 30)
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#define GET_VNTAG_DEST(vntagh) ((SCNtohl((vntagh)->tag) & 0x3FFF0000) >> 16)
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#define GET_VNTAG_LOOPED(vntagh) ((SCNtohl((vntagh)->tag) & 0x00008000) >> 15)
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#define GET_VNTAG_VERSION(vntagh) ((SCNtohl((vntagh)->tag) & 0x00003000) >> 12)
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#define GET_VNTAG_SRC(vntagh) ((SCNtohl((vntagh)->tag) & 0x00000FFF))
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#define GET_VNTAG_PROTO(vntagh) ((SCNtohs((vntagh)->protocol)))
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/** VNTag header struct */
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typedef struct VNTagHdr_ {
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uint32_t tag;
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uint16_t protocol; /**< protocol field */
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} __attribute__((__packed__)) VNTagHdr;
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/** VNTag header length */
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#define VNTAG_HEADER_LEN 6
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void DecodeVNTagRegisterTests(void);
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#endif /* __DECODE_VNTAG_H__ */
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