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Diffstat (limited to 'usr.sbin/timed/timed/cksum.c')
| -rw-r--r-- | usr.sbin/timed/timed/cksum.c | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/usr.sbin/timed/timed/cksum.c b/usr.sbin/timed/timed/cksum.c deleted file mode 100644 index 28583d76003d..000000000000 --- a/usr.sbin/timed/timed/cksum.c +++ /dev/null @@ -1,83 +0,0 @@ -/*- - * SPDX-License-Identifier: BSD-3-Clause - * - * Copyright (c) 1985, 1993 - * 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. 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. - */ - -#ifndef lint -#if 0 -static char sccsid[] = "@(#)cksum.c 8.1 (Berkeley) 6/6/93"; -#endif -static const char rcsid[] = - "$FreeBSD$"; -#endif /* not lint */ - -#include <sys/types.h> - -/* - * I N _ C K S U M - * - * Checksum routine for Internet Protocol family headers (C Version) - * - * There is no profit in a specialized version of the checksum - * function for any machine where int's are 32 bits and shorts are 16. - * - * All timed packets are smaller than 32K shorts, so there is no need to - * worry about carries except at the end. - */ -int -in_cksum(u_short *addr, int len) -{ - register int nleft = len; - register u_short *w = addr; - register u_short answer; - register int sum = 0; - - /* - * Our algorithm is simple, using a 32 bit accumulator (sum), - * we add sequential 16 bit words to it, and at the end, fold - * back all the carry bits from the top 16 bits into the lower - * 16 bits. - */ - while( nleft > 1 ) { - sum += *w++; - nleft -= 2; - } - - /* mop up an odd byte, if necessary */ - if( nleft == 1 ) - sum += (*(u_char *)w) << 8; - - /* - * add back carry outs from top 16 bits to low 16 bits - */ - sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ - sum += (sum >> 16); /* add carry */ - answer = ~sum; /* truncate to 16 bits */ - return (answer); -} |