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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#include <sys/types.h>
27#include <netinet/in.h>
28
29/*
30 * htonll(), ntohll(), htonl(), ntohl(), htons(), ntohs()
31 *
32 * On little endian machines these functions reverse the byte order of the
33 * input parameter and returns the result.  This is to convert the byte order
34 * from host byte order (little endian) to network byte order (big endian),
35 * or vice versa.
36 *
37 * On big endian machines these functions just return the input parameter,
38 * as the host byte order is the same as the network byte order (big endian).
39 */
40
41
42#ifdef	_LITTLE_ENDIAN
43uint64_t
44htonll(uint64_t in)
45{
46	return ((uint64_t)htonl((in >> 32) & 0xffffffff) |
47	    ((uint64_t)htonl(in & 0xffffffff) << 32));
48}
49
50uint64_t
51ntohll(uint64_t in)
52{
53	return ((uint64_t)ntohl((in >> 32) & 0xffffffff) |
54	    ((uint64_t)ntohl(in & 0xffffffff) << 32));
55}
56
57uint32_t
58htonl(uint32_t in)
59{
60	uint32_t	i;
61
62	i = (uint32_t)((in & (uint32_t)0xff000000) >> 24) +
63	    (uint32_t)((in & (uint32_t)0x00ff0000) >> 8) +
64	    (uint32_t)((in & (uint32_t)0x0000ff00) << 8) +
65	    (uint32_t)((in & (uint32_t)0x000000ff) << 24);
66	return (i);
67}
68
69uint32_t
70ntohl(uint32_t in)
71{
72	return (htonl(in));
73}
74
75uint16_t
76htons(uint16_t in)
77{
78	register int arg = (int)in;
79	uint16_t i;
80
81	i = (uint16_t)(((arg & 0xff00) >> 8) & 0xff);
82	i |= (uint16_t)((arg & 0xff) << 8);
83	return ((uint16_t)i);
84}
85
86uint16_t
87ntohs(uint16_t in)
88{
89	return (htons(in));
90}
91
92#else	/* _LITTLE_ENDIAN */
93
94#if defined(lint)
95uint64_t
96htonll(uint64_t in)
97{
98	return (in);
99}
100
101uint64_t
102ntohll(uint64_t in)
103{
104	return (in);
105}
106
107uint32_t
108htonl(uint32_t in)
109{
110	return (in);
111}
112
113uint32_t
114ntohl(uint32_t in)
115{
116	return (in);
117}
118
119uint16_t
120htons(uint16_t in)
121{
122	return (in);
123}
124
125uint16_t
126ntohs(uint16_t in)
127{
128	return (in);
129}
130
131#endif	/* lint */
132#endif	/* _LITTLE_ENDIAN */
133