patch-2.1.51 linux/arch/ppc/lib/checksum.c

• Lines: 137
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.50/linux/arch/ppc/lib/checksum.c
• Orig date: Wed Dec 18 00:49:52 1996

diff -u --recursive --new-file v2.1.50/linux/arch/ppc/lib/checksum.c linux/arch/ppc/lib/checksum.c
@@ -1,136 +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.
- *
- *		IP/TCP/UDP checksumming routines
- *
- * Authors:	Jorge Cwik, <jorge@laser.satlink.net>
- *		Arnt Gulbrandsen, <agulbra@nvg.unit.no>
- *		Tom May, <ftom@netcom.com>
- *		Lots of code moved from tcp.c and ip.c; see those files
- *		for more names.
- *
- * Adapted for PowerPC by Gary Thomas <gdt@mc.com>
- *
- *		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.
- */
-
-#include <net/checksum.h>
-
-/*
- * computes the checksum of a memory block at buff, length len,
- * and adds in "sum" (32-bit)
- *
- * returns a 32-bit number suitable for feeding into itself
- * or csum_tcpudp_magic
- *
- * this function must be called with even lengths, except
- * for the last fragment, which may be odd
- *
- * it's best to have buff aligned on a 32-bit boundary
- */
-unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
-{
-	unsigned long result = ~_csum_partial(buff, len, sum);
-#if 0	
-printk("Csum partial(%x, %d, %x) = %x\n", buff, len, sum, result);
-dump_buf(buff, len);
-#endif
-	return result;
-}
-
-/*
- * the same as csum_partial, but copies from src while it
- * checksums
- *
- * here even more important to align src and dst on a 32-bit boundary
- */
-
-unsigned int csum_partial_copy(const char *src, char *dst, int len, int sum)
-{
-	/*
-	 * The whole idea is to do the copy and the checksum at
-	 * the same time, but we do it the easy way now.
-	 *
-	 * At least csum on the source, not destination, for cache
-	 * reasons..
-	 */
-	sum = csum_partial(src, len, sum);
-	memcpy(dst, src, len);
-	return sum;
-}
-
-extern unsigned short _ip_fast_csum(unsigned char *buf);
-
-unsigned short
-ip_fast_csum(unsigned char *buf, unsigned int len)
-{
-	unsigned short _val;
-	_val = _ip_fast_csum(buf);
-#if 0
-	printk("IP CKSUM(%x, %d) = %x\n", buf, len, _val);
-	dump_buf(buf, len*4);
-#endif	
-	return (_val);
-}
-
-extern unsigned short _ip_compute_csum(unsigned char *buf, int len);
-
-unsigned short
-ip_compute_csum(unsigned char *buf, int len)
-{
-	unsigned short _val;
-	_val = _ip_compute_csum(buf, len);
-#if 0
-	printk("Compute IP CKSUM(%x, %d) = %x\n", buf, len, _val);
-	dump_buf(buf, len);
-#endif	
-	return (_val);
-}
-
-unsigned short
-_udp_check(unsigned char *buf, int len, int saddr, int daddr, int hdr);
-
-unsigned short
-udp_check(unsigned char *buf, int len, int saddr, int daddr)
-{
-	unsigned short _val;
-	int hdr;
-	hdr = (len << 16) + IPPROTO_UDP;
-	_val = _udp_check(buf, len, saddr, daddr, hdr);
-#if 0
-	printk("UDP CSUM(%x,%d,%x,%x) = %x\n", buf, len, saddr, daddr, _val);
-	dump_buf(buf, len);
-#endif	
-	return (_val);
-}
-
-unsigned short
-_tcp_check(unsigned char *buf, int len, int saddr, int daddr, int hdr);
-
-unsigned short
-csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len, unsigned short proto, unsigned int sum)
-{
-	unsigned short _val;
-	_val = _csum_tcpudp_magic(saddr, daddr, sum, (len<<16)+proto);
-#if 0
-	printk("TCP Magic(%x, %x, %x, %x) = %x\n", saddr, daddr, (len<<16)+proto, sum, _val);
-#endif
-	return (_val);
-}
-
-/*
- *	Fold a partial checksum without adding pseudo headers
- */
-
-unsigned int csum_fold(unsigned int sum)
-{
-	sum = (sum & 0xffff) + (sum >> 16);
-	sum = (sum & 0xffff) + (sum >> 16);
-	return ~sum;
-}
-