in_cksum.h (a5f50ef9e43b28e15a7e2a2aec73754456619f17) in_cksum.h (920b965865cd72bbb131f4461feb176074ce164a)
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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34
35#ifndef _MACHINE_IN_CKSUM_H_
36#define _MACHINE_IN_CKSUM_H_ 1
37
38#include <sys/cdefs.h>
39
40#define in_cksum(m, len) in_cksum_skip(m, len, 0)
41
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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34
35#ifndef _MACHINE_IN_CKSUM_H_
36#define _MACHINE_IN_CKSUM_H_ 1
37
38#include <sys/cdefs.h>
39
40#define in_cksum(m, len) in_cksum_skip(m, len, 0)
41
42#if defined(IPVERSION) && (IPVERSION == 4)
42/*
43 * It it useful to have an Internet checksum routine which is inlineable
44 * and optimized specifically for the task of computing IP header checksums
45 * in the normal case (where there are no options and the header length is
46 * therefore always exactly five 32-bit words.
47 */
48#ifdef __CC_SUPPORTS___INLINE
49

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60#define in_cksum_update(ip) \
61 do { \
62 int __tmpsum; \
63 __tmpsum = (int)ntohs(ip->ip_sum) + 256; \
64 ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); \
65 } while(0)
66
67#endif
43/*
44 * It it useful to have an Internet checksum routine which is inlineable
45 * and optimized specifically for the task of computing IP header checksums
46 * in the normal case (where there are no options and the header length is
47 * therefore always exactly five 32-bit words.
48 */
49#ifdef __CC_SUPPORTS___INLINE
50

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61#define in_cksum_update(ip) \
62 do { \
63 int __tmpsum; \
64 __tmpsum = (int)ntohs(ip->ip_sum) + 256; \
65 ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); \
66 } while(0)
67
68#endif
69#endif
68
69#ifdef _KERNEL
70
71#ifdef _KERNEL
72#if defined(IPVERSION) && (IPVERSION == 4)
70u_int in_cksum_hdr(const struct ip *ip);
73u_int in_cksum_hdr(const struct ip *ip);
74#endif
71u_short in_addword(u_short sum, u_short b);
72u_short in_pseudo(u_int sum, u_int b, u_int c);
73u_short in_cksum_skip(struct mbuf *m, int len, int skip);
74#endif
75
76#endif /* _MACHINE_IN_CKSUM_H_ */
75u_short in_addword(u_short sum, u_short b);
76u_short in_pseudo(u_int sum, u_int b, u_int c);
77u_short in_cksum_skip(struct mbuf *m, int len, int skip);
78#endif
79
80#endif /* _MACHINE_IN_CKSUM_H_ */