diff options
Diffstat (limited to 'freebsd/sys/arm/include/machine/in_cksum.h')
| -rw-r--r-- | freebsd/sys/arm/include/machine/in_cksum.h | 63 |
1 files changed, 37 insertions, 26 deletions
diff --git a/freebsd/sys/arm/include/machine/in_cksum.h b/freebsd/sys/arm/include/machine/in_cksum.h index 5e3e9333..37d88e2e 100644 --- a/freebsd/sys/arm/include/machine/in_cksum.h +++ b/freebsd/sys/arm/include/machine/in_cksum.h @@ -10,10 +10,6 @@ * 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. @@ -33,34 +29,49 @@ * 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 + * from: src/sys/alpha/include/in_cksum.h,v 1.7 2005/03/02 21:33:20 joerg * $FreeBSD$ */ -#ifndef _MACHINE_IN_CKSUM_HH_ -#define _MACHINE_IN_CKSUM_HH_ 1 +#ifndef _MACHINE_IN_CKSUM_H_ +#define _MACHINE_IN_CKSUM_H_ 1 -#include <freebsd/sys/cdefs.h> +#include <sys/cdefs.h> -#ifdef _KERNEL -u_short in_cksum(struct mbuf *m, int len); -u_short in_addword(u_short sum, u_short b); -u_short in_cksum_skip(struct mbuf *m, int len, int skip); -u_int do_cksum(const void *, int); -u_int in_cksum_hdr(const struct ip *); +#define in_cksum(m, len) in_cksum_skip(m, len, 0) -static __inline u_short -in_pseudo(u_int sum, u_int b, u_int c) +/* + * 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) { - __asm __volatile("adds %0, %0, %1\n" - "adcs %0, %0, %2\n" - "adc %0, %0, #0\n" - : "+r" (sum) - : "r" (b), "r" (c)); - sum = (sum & 0xffff) + (sum >> 16); - if (sum > 0xffff) - sum -= 0xffff; - return (sum); + int __tmpsum; + __tmpsum = (int)ntohs(ip->ip_sum) + 256; + ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); } -#endif /* _KERNEL */ -#endif /* _MACHINE_IN_CKSUM_HH_ */ +#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 + +#ifdef _KERNEL +u_int in_cksum_hdr(const struct ip *ip); +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_ */ |