diff options
Diffstat (limited to 'ANDROID_3.4.5/include/net/checksum.h')
| -rw-r--r-- | ANDROID_3.4.5/include/net/checksum.h | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/ANDROID_3.4.5/include/net/checksum.h b/ANDROID_3.4.5/include/net/checksum.h deleted file mode 100644 index ba55d8b8..00000000 --- a/ANDROID_3.4.5/include/net/checksum.h +++ /dev/null @@ -1,121 +0,0 @@ -/* - * INET An implementation of the TCP/IP protocol suite for the LINUX - * operating system. INET is implemented using the BSD Socket - * interface as the means of communication with the user level. - * - * Checksumming functions for IP, TCP, UDP and so on - * - * Authors: Jorge Cwik, <jorge@laser.satlink.net> - * Arnt Gulbrandsen, <agulbra@nvg.unit.no> - * Borrows very liberally from tcp.c and ip.c, see those - * files for more names. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#ifndef _CHECKSUM_H -#define _CHECKSUM_H - -#include <linux/errno.h> -#include <asm/types.h> -#include <asm/byteorder.h> -#include <asm/uaccess.h> -#include <asm/checksum.h> - -#ifndef _HAVE_ARCH_COPY_AND_CSUM_FROM_USER -static inline -__wsum csum_and_copy_from_user (const void __user *src, void *dst, - int len, __wsum sum, int *err_ptr) -{ - if (access_ok(VERIFY_READ, src, len)) - return csum_partial_copy_from_user(src, dst, len, sum, err_ptr); - - if (len) - *err_ptr = -EFAULT; - - return sum; -} -#endif - -#ifndef HAVE_CSUM_COPY_USER -static __inline__ __wsum csum_and_copy_to_user -(const void *src, void __user *dst, int len, __wsum sum, int *err_ptr) -{ - sum = csum_partial(src, len, sum); - - if (access_ok(VERIFY_WRITE, dst, len)) { - if (copy_to_user(dst, src, len) == 0) - return sum; - } - if (len) - *err_ptr = -EFAULT; - - return (__force __wsum)-1; /* invalid checksum */ -} -#endif - -static inline __wsum csum_add(__wsum csum, __wsum addend) -{ - u32 res = (__force u32)csum; - res += (__force u32)addend; - return (__force __wsum)(res + (res < (__force u32)addend)); -} - -static inline __wsum csum_sub(__wsum csum, __wsum addend) -{ - return csum_add(csum, ~addend); -} - -static inline __wsum -csum_block_add(__wsum csum, __wsum csum2, int offset) -{ - u32 sum = (__force u32)csum2; - if (offset&1) - sum = ((sum&0xFF00FF)<<8)+((sum>>8)&0xFF00FF); - return csum_add(csum, (__force __wsum)sum); -} - -static inline __wsum -csum_block_sub(__wsum csum, __wsum csum2, int offset) -{ - u32 sum = (__force u32)csum2; - if (offset&1) - sum = ((sum&0xFF00FF)<<8)+((sum>>8)&0xFF00FF); - return csum_sub(csum, (__force __wsum)sum); -} - -static inline __wsum csum_unfold(__sum16 n) -{ - return (__force __wsum)n; -} - -#define CSUM_MANGLED_0 ((__force __sum16)0xffff) - -static inline void csum_replace4(__sum16 *sum, __be32 from, __be32 to) -{ - __be32 diff[] = { ~from, to }; - - *sum = csum_fold(csum_partial(diff, sizeof(diff), ~csum_unfold(*sum))); -} - -static inline void csum_replace2(__sum16 *sum, __be16 from, __be16 to) -{ - csum_replace4(sum, (__force __be32)from, (__force __be32)to); -} - -struct sk_buff; -extern void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb, - __be32 from, __be32 to, int pseudohdr); - -static inline void inet_proto_csum_replace2(__sum16 *sum, struct sk_buff *skb, - __be16 from, __be16 to, - int pseudohdr) -{ - inet_proto_csum_replace4(sum, skb, (__force __be32)from, - (__force __be32)to, pseudohdr); -} - -#endif |