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Diffstat (limited to 'c/src/libnetworking/machine/in_cksum.h')
| -rw-r--r-- | c/src/libnetworking/machine/in_cksum.h | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/c/src/libnetworking/machine/in_cksum.h b/c/src/libnetworking/machine/in_cksum.h deleted file mode 100644 index 15509b3888..0000000000 --- a/c/src/libnetworking/machine/in_cksum.h +++ /dev/null @@ -1,118 +0,0 @@ -/*- - * 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. 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 - * $Id$ - */ - -#ifndef _MACHINE_IN_CKSUM_H_ -#define _MACHINE_IN_CKSUM_H_ 1 - -#include <sys/cdefs.h> - -/* - * 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. - */ -#if (defined(__GNUC__) && defined(__i386__)) -static __inline u_int -in_cksum_hdr(const struct ip *ip) -{ - register u_int sum = 0; - -#define ADD(n) __asm("addl " #n "(%2), %0" : "=r" (sum) : "0" (sum), "r" (ip)) -#define ADDC(n) __asm("adcl " #n "(%2), %0" : "=r" (sum) : "0" (sum), "r" (ip)) -#define MOP __asm("adcl $0, %0" : "=r" (sum) : "0" (sum)) - - ADD(0); - ADDC(4); - ADDC(8); - ADDC(12); - ADDC(16); - MOP; - sum = (sum & 0xffff) + (sum >> 16); - if (sum > 0xffff) - sum -= 0xffff; - - return ~sum & 0xffff; -} - -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)); -} - -#elif (defined(__GNUC__) && (defined(__mc68000__) || defined(__m68k__))) - -static __inline__ u_int -in_cksum_hdr(const struct ip *ip) -{ - register u_int *ap = (u_int *)ip; - register u_int sum = *ap++; - register u_int tmp; - - __asm__("addl %2@+,%0\n\t" - "movel %2@+,%1\n\t" - "addxl %1,%0\n\t" - "movel %2@+,%1\n\t" - "addxl %1,%0\n\t" - "movel %2@,%1\n\t" - "addxl %1,%0\n\t" - "moveq #0,%1\n\t" - "addxl %1,%0\n" : - "=d" (sum), "=d" (tmp), "=a" (ap) : - "0" (sum), "2" (ap)); - sum = (sum & 0xffff) + (sum >> 16); - if (sum > 0xffff) - sum -= 0xffff; - return ~sum & 0xffff; -} - -#else -u_int in_cksum_hdr __P((const struct ip *)); -#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 /* _MACHINE_IN_CKSUM_H_ */ |