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

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2016 6WIND S.A.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Intel Corporation nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef _RTE_GRE_H_
  34 #define _RTE_GRE_H_
  35
  36 #include <stdint.h>
  37 #include <rte_byteorder.h>
  38
  39 #ifdef __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 /**
  44  * GRE Header
  45  */
  46 struct gre_hdr {
  47 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
  48         uint16_t res2:4; /**< Reserved */
  49         uint16_t s:1;    /**< Sequence Number Present bit */
  50         uint16_t k:1;    /**< Key Present bit */
  51         uint16_t res1:1; /**< Reserved */
  52         uint16_t c:1;    /**< Checksum Present bit */
  53         uint16_t ver:3;  /**< Version Number */
  54         uint16_t res3:5; /**< Reserved */
  55 #elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
  56         uint16_t c:1;    /**< Checksum Present bit */
  57         uint16_t res1:1; /**< Reserved */
  58         uint16_t k:1;    /**< Key Present bit */
  59         uint16_t s:1;    /**< Sequence Number Present bit */
  60         uint16_t res2:4; /**< Reserved */
  61         uint16_t res3:5; /**< Reserved */
  62         uint16_t ver:3;  /**< Version Number */
  63 #endif
  64         uint16_t proto;  /**< Protocol Type */
  65 } __attribute__((__packed__));
  66
  67 #ifdef __cplusplus
  68 }
  69 #endif
  70
  71 #endif /* RTE_GRE_H_ */