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_ */ 72