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