ceph/src/spdk/dpdk/lib/librte_net/rte_gre.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2016 6WIND S.A.
   3  */
   4
   5 #ifndef _RTE_GRE_H_
   6 #define _RTE_GRE_H_
   7
   8 #include <stdint.h>
   9 #include <rte_byteorder.h>
  10
  11 #ifdef __cplusplus
  12 extern "C" {
  13 #endif
  14
  15 /**
  16  * GRE Header
  17  */
  18 __extension__
  19 struct gre_hdr {
  20 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
  21         uint16_t res2:4; /**< Reserved */
  22         uint16_t s:1;    /**< Sequence Number Present bit */
  23         uint16_t k:1;    /**< Key Present bit */
  24         uint16_t res1:1; /**< Reserved */
  25         uint16_t c:1;    /**< Checksum Present bit */
  26         uint16_t ver:3;  /**< Version Number */
  27         uint16_t res3:5; /**< Reserved */
  28 #elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
  29         uint16_t c:1;    /**< Checksum Present bit */
  30         uint16_t res1:1; /**< Reserved */
  31         uint16_t k:1;    /**< Key Present bit */
  32         uint16_t s:1;    /**< Sequence Number Present bit */
  33         uint16_t res2:4; /**< Reserved */
  34         uint16_t res3:5; /**< Reserved */
  35         uint16_t ver:3;  /**< Version Number */
  36 #endif
  37         uint16_t proto;  /**< Protocol Type */
  38 } __attribute__((__packed__));
  39
  40 #ifdef __cplusplus
  41 }
  42 #endif
  43
  44 #endif /* RTE_GRE_H_ */