mirror of https://github.com/F-Stack/f-stack.git
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright 2016 6WIND S.A.
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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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/**
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* @file
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*
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* GRE headers definition.
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*
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* Generic Routing Encapsulation (GRE) is a tunneling protocol
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* that can encapsulate a wide variety of network layer protocols
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* inside virtual point-to-point links or point-to-multipoint links
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* over an Internet Protocol network.
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*/
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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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__extension__
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struct rte_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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} __rte_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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