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Commit | Line | Data |
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064af421 | 1 | /* |
3d75c660 | 2 | * Copyright (c) 2008, 2010, 2011, 2013, 2016 Nicira, Inc. |
064af421 | 3 | * |
a14bc59f BP |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
064af421 | 7 | * |
a14bc59f BP |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
064af421 | 15 | */ |
10a24935 BP |
16 | #ifndef BYTE_ORDER_H |
17 | #define BYTE_ORDER_H 1 | |
064af421 | 18 | |
064af421 | 19 | #include <sys/types.h> |
b2befd5b BP |
20 | #include <netinet/in.h> |
21 | #include <arpa/inet.h> | |
965f03d8 | 22 | #include <inttypes.h> |
dbba996b | 23 | #include "openvswitch/types.h" |
064af421 | 24 | |
6506f45c | 25 | #ifndef __CHECKER__ |
837351e6 | 26 | #if !(defined(_WIN32) || defined(htonll)) |
dbba996b | 27 | static inline ovs_be64 |
064af421 BP |
28 | htonll(uint64_t n) |
29 | { | |
30 | return htonl(1) == 1 ? n : ((uint64_t) htonl(n) << 32) | htonl(n >> 32); | |
31 | } | |
32 | ||
33 | static inline uint64_t | |
dbba996b | 34 | ntohll(ovs_be64 n) |
064af421 BP |
35 | { |
36 | return htonl(1) == 1 ? n : ((uint64_t) ntohl(n) << 32) | ntohl(n >> 32); | |
37 | } | |
837351e6 | 38 | #endif /* !(defined(_WIN32) || defined(htonll)) */ |
6506f45c BP |
39 | #else |
40 | /* Making sparse happy with these functions also makes them unreadable, so | |
41 | * don't bother to show it their implementations. */ | |
42 | ovs_be64 htonll(uint64_t); | |
43 | uint64_t ntohll(ovs_be64); | |
44 | #endif | |
064af421 | 45 | |
32ea15f6 JP |
46 | static inline ovs_be128 |
47 | hton128(const ovs_u128 src) | |
557344e3 | 48 | { |
32ea15f6 JP |
49 | ovs_be128 dst; |
50 | ||
51 | dst.be64.hi = htonll(src.u64.hi); | |
52 | dst.be64.lo = htonll(src.u64.lo); | |
53 | return dst; | |
557344e3 JS |
54 | } |
55 | ||
32ea15f6 JP |
56 | static inline ovs_u128 |
57 | ntoh128(const ovs_be128 src) | |
557344e3 | 58 | { |
32ea15f6 JP |
59 | ovs_u128 dst; |
60 | ||
61 | dst.u64.hi = ntohll(src.be64.hi); | |
62 | dst.u64.lo = ntohll(src.be64.lo); | |
63 | return dst; | |
557344e3 JS |
64 | } |
65 | ||
97025b23 JS |
66 | static inline uint32_t |
67 | uint32_byteswap(uint32_t crc) { | |
68 | return (((crc & 0x000000ff) << 24) | | |
69 | ((crc & 0x0000ff00) << 8) | | |
70 | ((crc & 0x00ff0000) >> 8) | | |
71 | ((crc & 0xff000000) >> 24)); | |
72 | } | |
97025b23 | 73 | |
965f03d8 BP |
74 | /* These macros may substitute for htons(), htonl(), and htonll() in contexts |
75 | * where function calls are not allowed, such as case labels. They should not | |
76 | * be used elsewhere because all of them evaluate their argument many times. */ | |
6506f45c BP |
77 | #if defined(WORDS_BIGENDIAN) || __CHECKER__ |
78 | #define CONSTANT_HTONS(VALUE) ((OVS_FORCE ovs_be16) ((VALUE) & 0xffff)) | |
79 | #define CONSTANT_HTONL(VALUE) ((OVS_FORCE ovs_be32) ((VALUE) & 0xffffffff)) | |
80 | #define CONSTANT_HTONLL(VALUE) \ | |
81 | ((OVS_FORCE ovs_be64) ((VALUE) & UINT64_C(0xffffffffffffffff))) | |
965f03d8 BP |
82 | #else |
83 | #define CONSTANT_HTONS(VALUE) \ | |
dbba996b BP |
84 | (((((ovs_be16) (VALUE)) & 0xff00) >> 8) | \ |
85 | ((((ovs_be16) (VALUE)) & 0x00ff) << 8)) | |
965f03d8 | 86 | #define CONSTANT_HTONL(VALUE) \ |
dbba996b BP |
87 | (((((ovs_be32) (VALUE)) & 0x000000ff) << 24) | \ |
88 | ((((ovs_be32) (VALUE)) & 0x0000ff00) << 8) | \ | |
89 | ((((ovs_be32) (VALUE)) & 0x00ff0000) >> 8) | \ | |
90 | ((((ovs_be32) (VALUE)) & 0xff000000) >> 24)) | |
965f03d8 | 91 | #define CONSTANT_HTONLL(VALUE) \ |
dbba996b BP |
92 | (((((ovs_be64) (VALUE)) & UINT64_C(0x00000000000000ff)) << 56) | \ |
93 | ((((ovs_be64) (VALUE)) & UINT64_C(0x000000000000ff00)) << 40) | \ | |
94 | ((((ovs_be64) (VALUE)) & UINT64_C(0x0000000000ff0000)) << 24) | \ | |
95 | ((((ovs_be64) (VALUE)) & UINT64_C(0x00000000ff000000)) << 8) | \ | |
96 | ((((ovs_be64) (VALUE)) & UINT64_C(0x000000ff00000000)) >> 8) | \ | |
97 | ((((ovs_be64) (VALUE)) & UINT64_C(0x0000ff0000000000)) >> 24) | \ | |
98 | ((((ovs_be64) (VALUE)) & UINT64_C(0x00ff000000000000)) >> 40) | \ | |
99 | ((((ovs_be64) (VALUE)) & UINT64_C(0xff00000000000000)) >> 56)) | |
965f03d8 BP |
100 | #endif |
101 | ||
a13784ba BP |
102 | /* Returns the ovs_be32 that you would get from: |
103 | * | |
104 | * union { uint8_t b[4]; ovs_be32 be32; } x = { .b = { b0, b1, b2, b3 } }; | |
105 | * return x.be32; | |
106 | * | |
107 | * but without the undefined behavior. */ | |
108 | static inline ovs_be32 | |
109 | bytes_to_be32(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3) | |
110 | { | |
419681da | 111 | #if WORDS_BIGENDIAN |
a13784ba | 112 | uint32_t x = ((uint32_t) b0 << 24) | (b1 << 16) | (b2 << 8) | b3; |
419681da | 113 | #else |
a13784ba | 114 | uint32_t x = ((uint32_t) b3 << 24) | (b2 << 16) | (b1 << 8) | b0; |
419681da | 115 | #endif |
a13784ba BP |
116 | return (OVS_FORCE ovs_be32) x; |
117 | } | |
419681da | 118 | |
3d75c660 BP |
119 | /* These functions zero-extend big-endian values to longer ones, |
120 | * or truncate long big-endian value to shorter ones. */ | |
121 | #ifndef __CHECKER__ | |
122 | #if WORDS_BIGENDIAN | |
123 | static inline ovs_be32 be16_to_be32(ovs_be16 x) { return x; } | |
124 | static inline ovs_be64 be16_to_be64(ovs_be16 x) { return x; } | |
125 | static inline ovs_be64 be32_to_be64(ovs_be32 x) { return x; } | |
126 | static inline ovs_be32 be64_to_be32(ovs_be64 x) { return x; } | |
127 | static inline ovs_be16 be64_to_be16(ovs_be64 x) { return x; } | |
128 | static inline ovs_be16 be32_to_be16(ovs_be32 x) { return x; } | |
129 | #else /* !WORDS_BIGENDIAN */ | |
130 | static inline ovs_be32 be16_to_be32(ovs_be16 x) { return (ovs_be32) x << 16; } | |
131 | static inline ovs_be64 be16_to_be64(ovs_be16 x) { return (ovs_be64) x << 48; } | |
132 | static inline ovs_be64 be32_to_be64(ovs_be32 x) { return (ovs_be64) x << 32; } | |
133 | static inline ovs_be32 be64_to_be32(ovs_be64 x) { return x >> 32; } | |
134 | static inline ovs_be16 be64_to_be16(ovs_be64 x) { return x >> 48; } | |
135 | static inline ovs_be16 be32_to_be16(ovs_be32 x) { return x >> 16; } | |
136 | #endif /* !WORDS_BIGENDIAN */ | |
137 | #else /* __CHECKER__ */ | |
138 | /* Making sparse happy with these functions also makes them unreadable, so | |
139 | * don't bother to show it their implementations. */ | |
140 | ovs_be32 be16_to_be32(ovs_be16); | |
141 | ovs_be64 be16_to_be64(ovs_be16); | |
142 | ovs_be64 be32_to_be64(ovs_be32); | |
143 | ovs_be32 be64_to_be32(ovs_be64); | |
144 | ovs_be16 be64_to_be16(ovs_be64); | |
145 | ovs_be16 be32_to_be16(ovs_be32); | |
146 | #endif | |
147 | ||
10a24935 | 148 | #endif /* byte-order.h */ |