xref: /illumos-gate/usr/src/common/net/dhcp/v4_sum_impl.h (revision c40a6cd785e883b3f052b122c332e21174fc1871)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright (c) 1999-2001 by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #ifndef	_V4_SUM_IMPL_H
28 #define	_V4_SUM_IMPL_H
29 
30 #include <sys/types.h>
31 #include <netinet/in.h>
32 #include <netinet/udp.h>
33 
34 /*
35  * Common functions for various IP/UDP module checksum implementations.
36  */
37 
38 #ifdef	__cplusplus
39 extern "C" {
40 #endif
41 
42 #define	BIT_WRAP		(uint_t)0x10000	/* checksum wrap */
43 
44 extern uint16_t ipv4cksum(uint16_t *, uint16_t);
45 extern uint16_t udp_chksum(struct udphdr *, const struct in_addr *,
46     const struct in_addr *, uint8_t);
47 
48 #ifdef	__cplusplus
49 }
50 #endif
51 
52 #endif	/* _V4_SUM_IMPL_H */
53