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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2016 6WIND S.A.
*/
#ifndef _RTE_GRE_H_
#define _RTE_GRE_H_
#include <stdint.h>
#include <rte_byteorder.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* GRE Header
*/
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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