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
43 uint64_t
htonll(uint64_t in)44 htonll(uint64_t in)
45 {
46 return ((uint64_t)htonl((in >> 32) & 0xffffffff) |
47 ((uint64_t)htonl(in & 0xffffffff) << 32));
48 }
49
50 uint64_t
ntohll(uint64_t in)51 ntohll(uint64_t in)
52 {
53 return ((uint64_t)ntohl((in >> 32) & 0xffffffff) |
54 ((uint64_t)ntohl(in & 0xffffffff) << 32));
55 }
56
57 uint32_t
htonl(uint32_t in)58 htonl(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
69 uint32_t
ntohl(uint32_t in)70 ntohl(uint32_t in)
71 {
72 return (htonl(in));
73 }
74
75 uint16_t
htons(uint16_t in)76 htons(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
86 uint16_t
ntohs(uint16_t in)87 ntohs(uint16_t in)
88 {
89 return (htons(in));
90 }
91
92 #else /* _LITTLE_ENDIAN */
93
94 #if defined(lint)
95 uint64_t
htonll(uint64_t in)96 htonll(uint64_t in)
97 {
98 return (in);
99 }
100
101 uint64_t
ntohll(uint64_t in)102 ntohll(uint64_t in)
103 {
104 return (in);
105 }
106
107 uint32_t
htonl(uint32_t in)108 htonl(uint32_t in)
109 {
110 return (in);
111 }
112
113 uint32_t
ntohl(uint32_t in)114 ntohl(uint32_t in)
115 {
116 return (in);
117 }
118
119 uint16_t
htons(uint16_t in)120 htons(uint16_t in)
121 {
122 return (in);
123 }
124
125 uint16_t
ntohs(uint16_t in)126 ntohs(uint16_t in)
127 {
128 return (in);
129 }
130
131 #endif /* lint */
132 #endif /* _LITTLE_ENDIAN */
133