1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283 |
- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * from tahoe: in_cksum.c 1.2 86/01/05
- * from: @(#)in_cksum.c 1.3 (Berkeley) 1/19/91
- * from: Id: in_cksum.c,v 1.8 1995/12/03 18:35:19 bde Exp
- * $FreeBSD$
- */
- #ifndef _MACHINE_IN_CKSUM_H_
- #define _MACHINE_IN_CKSUM_H_ 1
- #include <sys/cdefs.h>
- #define in_cksum(m, len) in_cksum_skip(m, len, 0)
- #if defined(IPVERSION) && (IPVERSION == 4)
- /*
- * It it useful to have an Internet checksum routine which is inlineable
- * and optimized specifically for the task of computing IP header checksums
- * in the normal case (where there are no options and the header length is
- * therefore always exactly five 32-bit words.
- */
- #ifdef __CC_SUPPORTS___INLINE
- static __inline void
- in_cksum_update(struct ip *ip)
- {
- int __tmpsum;
- __tmpsum = (int)ntohs(ip->ip_sum) + 256;
- ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16));
- }
- #else
- #define in_cksum_update(ip) \
- do { \
- int __tmpsum; \
- __tmpsum = (int)ntohs(ip->ip_sum) + 256; \
- ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); \
- } while(0)
- #endif
- #endif
- #ifdef _KERNEL
- #if defined(IPVERSION) && (IPVERSION == 4)
- u_int in_cksum_hdr(const struct ip *ip);
- #endif
- u_short in_addword(u_short sum, u_short b);
- u_short in_pseudo(u_int sum, u_int b, u_int c);
- u_short in_cksum_skip(struct mbuf *m, int len, int skip);
- #endif
- #endif /* _MACHINE_IN_CKSUM_H_ */
|