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Commit | Line | Data |
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064af421 | 1 | /* |
d6c1bc0d | 2 | * Copyright (c) 2008, 2011, 2015 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 BP |
15 | */ |
16 | ||
17 | #ifndef CSUM_H | |
18 | #define CSUM_H 1 | |
19 | ||
20 | #include <stddef.h> | |
21 | #include <stdint.h> | |
6879df6b | 22 | #include "openvswitch/types.h" |
064af421 | 23 | |
932c96b7 JR |
24 | struct in6_addr; |
25 | ||
6879df6b | 26 | ovs_be16 csum(const void *, size_t); |
064af421 | 27 | uint32_t csum_continue(uint32_t partial, const void *, size_t); |
6879df6b BP |
28 | ovs_be16 csum_finish(uint32_t partial); |
29 | ovs_be16 recalc_csum16(ovs_be16 old_csum, ovs_be16 old_u16, ovs_be16 new_u16); | |
30 | ovs_be16 recalc_csum32(ovs_be16 old_csum, ovs_be32 old_u32, ovs_be32 new_u32); | |
74ff3298 JR |
31 | ovs_be16 recalc_csum48(ovs_be16 old_csum, const struct eth_addr old_mac, |
32 | const struct eth_addr new_mac); | |
4528f34f | 33 | ovs_be16 recalc_csum128(ovs_be16 old_csum, ovs_16aligned_be32 old_u32[4], |
932c96b7 | 34 | const struct in6_addr *); |
064af421 | 35 | |
d6c1bc0d BP |
36 | #ifndef __CHECKER__ |
37 | /* Adds the 16 bits in 'new' to the partial IP checksum 'partial' and returns | |
38 | * the updated checksum. (To start a new checksum, pass 0 for 'partial'. To | |
39 | * obtain the finished checksum, pass the return value to csum_finish().) */ | |
40 | static inline uint32_t | |
41 | csum_add16(uint32_t partial, ovs_be16 new) | |
42 | { | |
43 | return partial + new; | |
44 | } | |
45 | ||
46 | /* Adds the 32 bits in 'new' to the partial IP checksum 'partial' and returns | |
47 | * the updated checksum. (To start a new checksum, pass 0 for 'partial'. To | |
48 | * obtain the finished checksum, pass the return value to csum_finish().) */ | |
49 | static inline uint32_t | |
50 | csum_add32(uint32_t partial, ovs_be32 new) | |
51 | { | |
52 | return partial + (new >> 16) + (new & 0xffff); | |
53 | } | |
54 | #else | |
55 | uint32_t csum_add16(uint32_t partial, ovs_be16); | |
56 | uint32_t csum_add32(uint32_t partial, ovs_be32); | |
57 | #endif | |
58 | ||
064af421 | 59 | #endif /* csum.h */ |