DPDK  17.05.2
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
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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,
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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 
46 struct gre_hdr {
47 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
48  uint16_t res2:4;
49  uint16_t s:1;
50  uint16_t k:1;
51  uint16_t res1:1;
52  uint16_t c:1;
53  uint16_t ver:3;
54  uint16_t res3:5;
55 #elif RTE_BYTE_ORDER == RTE_BIG_ENDIAN
56  uint16_t c:1;
57  uint16_t res1:1;
58  uint16_t k:1;
59  uint16_t s:1;
60  uint16_t res2:4;
61  uint16_t res3:5;
62  uint16_t ver:3;
63 #endif
64  uint16_t proto;
65 } __attribute__((__packed__));
66 
67 #ifdef __cplusplus
68 }
69 #endif
70 
71 #endif /* RTE_GRE_H_ */