72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2016 6WIND S.A.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTE_GRE_H_
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#define _RTE_GRE_H_
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#include <stdint.h>
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#include <rte_byteorder.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* GRE Header
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*/
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struct gre_hdr {
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#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
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uint16_t res2:4; /**< Reserved */
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uint16_t s:1; /**< Sequence Number Present bit */
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uint16_t k:1; /**< Key Present bit */
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uint16_t res1:1; /**< Reserved */
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uint16_t c:1; /**< Checksum Present bit */
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uint16_t ver:3; /**< Version Number */
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uint16_t res3:5; /**< Reserved */
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#elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
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uint16_t c:1; /**< Checksum Present bit */
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uint16_t res1:1; /**< Reserved */
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uint16_t k:1; /**< Key Present bit */
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uint16_t s:1; /**< Sequence Number Present bit */
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uint16_t res2:4; /**< Reserved */
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uint16_t res3:5; /**< Reserved */
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uint16_t ver:3; /**< Version Number */
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#endif
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uint16_t proto; /**< Protocol Type */
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} __attribute__((__packed__));
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#ifdef __cplusplus
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}
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#endif
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#endif /* RTE_GRE_H_ */
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