blob: 2856a0d8095f3a2302b51b70042ab39d679694ac (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef _FRR_CHECKSUM_H
#define _FRR_CHECKSUM_H
#include <stdint.h>
#include <netinet/in.h>
#ifdef __cplusplus
extern "C" {
#endif
/* IPv4 pseudoheader */
struct ipv4_ph {
struct in_addr src;
struct in_addr dst;
uint8_t rsvd;
uint8_t proto;
uint16_t len;
} __attribute__((packed));
/* IPv6 pseudoheader */
struct ipv6_ph {
struct in6_addr src;
struct in6_addr dst;
uint32_t ulpl;
uint8_t zero[3];
uint8_t next_hdr;
} __attribute__((packed));
extern uint16_t in_cksumv(const struct iovec *iov, size_t iov_len);
static inline uint16_t in_cksum(const void *data, size_t nbytes)
{
struct iovec iov[1];
iov[0].iov_base = (void *)data;
iov[0].iov_len = nbytes;
return in_cksumv(iov, array_size(iov));
}
static inline uint16_t in_cksum_with_ph4(const struct ipv4_ph *ph,
const void *data, size_t nbytes)
{
struct iovec iov[2];
iov[0].iov_base = (void *)ph;
iov[0].iov_len = sizeof(*ph);
iov[1].iov_base = (void *)data;
iov[1].iov_len = nbytes;
return in_cksumv(iov, array_size(iov));
}
static inline uint16_t in_cksum_with_ph6(const struct ipv6_ph *ph,
const void *data, size_t nbytes)
{
struct iovec iov[2];
iov[0].iov_base = (void *)ph;
iov[0].iov_len = sizeof(*ph);
iov[1].iov_base = (void *)data;
iov[1].iov_len = nbytes;
return in_cksumv(iov, array_size(iov));
}
#define FLETCHER_CHECKSUM_VALIDATE 0xffff
extern uint16_t fletcher_checksum(uint8_t *, const size_t len,
const uint16_t offset);
#ifdef __cplusplus
}
#endif
#endif /* _FRR_CHECKSUM_H */
|
