in_cksum.h (a5f50ef9e43b28e15a7e2a2aec73754456619f17) | in_cksum.h (14d617bf1f85ab8ca6ba341442d209a277d0cfb0) |
---|---|
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 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. | 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 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. |
13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. |
|
13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE --- 19 unchanged lines hidden (view full) --- 40#define in_cksum(m, len) in_cksum_skip(m, len, 0) 41 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 */ | 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE --- 19 unchanged lines hidden (view full) --- 44#define in_cksum(m, len) in_cksum_skip(m, len, 0) 45 46/* 47 * It it useful to have an Internet checksum routine which is inlineable 48 * and optimized specifically for the task of computing IP header checksums 49 * in the normal case (where there are no options and the header length is 50 * therefore always exactly five 32-bit words. 51 */ |
48#ifdef __CC_SUPPORTS___INLINE | 52#ifdef __GNUC__ |
49 50static __inline void 51in_cksum_update(struct ip *ip) 52{ 53 int __tmpsum; 54 __tmpsum = (int)ntohs(ip->ip_sum) + 256; 55 ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); 56} --- 20 unchanged lines hidden --- | 53 54static __inline void 55in_cksum_update(struct ip *ip) 56{ 57 int __tmpsum; 58 __tmpsum = (int)ntohs(ip->ip_sum) + 256; 59 ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); 60} --- 20 unchanged lines hidden --- |