1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
.\"
.\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for
.\" permission to reproduce portions of its copyrighted documentation.
.\" Original documentation from The Open Group can be obtained online at
.\" http://www.opengroup.org/bookstore/.
.\"
.\" The Institute of Electrical and Electronics Engineers and The Open
.\" Group, have given us permission to reprint portions of their
.\" documentation.
.\"
.\" In the following statement, the phrase ``this text'' refers to portions
.\" of the system documentation.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" in the SunOS Reference Manual, from IEEE Std 1003.1, 2004 Edition,
.\" Standard for Information Technology -- Portable Operating System
.\" Interface (POSIX), The Open Group Base Specifications Issue 6,
.\" Copyright (C) 2001-2004 by the Institute of Electrical and Electronics
.\" Engineers, Inc and The Open Group. In the event of any discrepancy
.\" between these versions and the original IEEE and The Open Group
.\" Standard, the original IEEE and The Open Group Standard is the referee
.\" document. The original Standard can be obtained online at
.\" http://www.opengroup.org/unix/online.html.
.\"
.\" This notice shall appear on any product containing this material.
.\"
.\" The contents of this file are subject to the terms of the
.\" Common Development and Distribution License (the "License").
.\" You may not use this file except in compliance with the License.
.\"
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
.\" or http://www.opensolaris.org/os/licensing.
.\" See the License for the specific language governing permissions
.\" and limitations under the License.
.\"
.\" When distributing Covered Code, include this CDDL HEADER in each
.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
.\" If applicable, add the following below this CDDL HEADER, with the
.\" fields enclosed by brackets "[]" replaced with your own identifying
.\" information: Portions Copyright [yyyy] [name of copyright owner]
.\"
.\"
.\" Copyright (c) 1992, X/Open Company Limited. All Rights Reserved.
.\" Portions Copyright (c) 2000, Sun Microsystems, Inc. All Rights Reserved.
.\"
.TH INET_ADDR 3XNET "Jun 10, 2002"
.SH NAME
inet_addr, inet_network, inet_makeaddr, inet_lnaof, inet_netof, inet_ntoa \-
Internet address manipulation
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR ... ] \fIfile\fR ... \fB-lxnet\fR [ \fIlibrary\fR ... ]
#include <arpa/inet.h>
\fBin_addr_t\fR \fBinet_addr\fR(\fBconst char *\fR\fIcp\fR);
.fi
.LP
.nf
\fBin_addr_t\fR \fBinet_lnaof\fR(\fBstruct in_addr\fR \fIin\fR);
.fi
.LP
.nf
\fBstruct in_addr\fR \fBinet_makeaddr\fR(\fBin_addr_t\fR \fInet\fR, \fBin_addr_t\fR \fIlna\fR);
.fi
.LP
.nf
\fBin_addr_t\fR \fBinet_netof\fR(\fBstruct in_addr\fR \fIin\fR);
.fi
.LP
.nf
\fBin_addr_t\fR \fBinet_network\fR(\fBconst char *\fR\fIcp\fR);
.fi
.LP
.nf
\fBchar *\fR\fBinet_ntoa\fR(\fBstruct in_addr\fR \fIin\fR);
.fi
.SH DESCRIPTION
.sp
.LP
The \fBinet_addr()\fR function converts the string pointed to by \fIcp\fR, in
the Internet standard dot notation, to an integer value suitable for use as an
Internet address.
.sp
.LP
The \fBinet_lnaof()\fR function takes an Internet host address specified by
\fIin\fR and extracts the local network address part, in host byte order.
.sp
.LP
The \fBinet_makeaddr()\fR function takes the Internet network number specified
by \fInet\fR and the local network address specified by \fIlna\fR, both in host
byte order, and constructs an Internet address from them.
.sp
.LP
The \fBinet_netof()\fR function takes an Internet host address specified by
\fIin\fR and extracts the network number part, in host byte order.
.sp
.LP
The \fBinet_network()\fR function converts the string pointed to by \fIcp\fR,
in the Internet standard dot notation, to an integer value suitable for use as
an Internet network number.
.sp
.LP
The \fBinet_ntoa()\fR function converts the Internet host address specified by
\fIin\fR to a string in the Internet standard dot notation.
.sp
.LP
All Internet addresses are returned in network order (bytes ordered from left
to right).
.sp
.LP
Values specified using dot notation take one of the following forms:
.sp
.ne 2
.na
\fB\fBa.b.c.d\fR\fR
.ad
.RS 11n
When four parts are specified, each is interpreted as a byte of data and
assigned, from left to right, to the four bytes of an Internet address.
.RE
.sp
.ne 2
.na
\fB\fBa.b.c\fR\fR
.ad
.RS 11n
When a three-part address is specified, the last part is interpreted as a
16-bit quantity and placed in the rightmost two bytes of the network address.
This makes the three-part address format convenient for specifying Class B
network addresses as \fB128.\fR\fInet\fR.\fIhost\fR.
.RE
.sp
.ne 2
.na
\fB\fBa.b\fR\fR
.ad
.RS 11n
When a two-part address is supplied, the last part is interpreted as a 24-bit
quantity and placed in the rightmost three bytes of the network address. This
makes the two-part address format convenient for specifying Class A network
addresses as \fInet\fR\fB\&.\fR\fIhost\fR.
.RE
.sp
.ne 2
.na
\fB\fBa\fR\fR
.ad
.RS 11n
When only one part is given, the value is stored directly in the network
address without any byte rearrangement.
.RE
.sp
.LP
All numbers supplied as parts in dot notation may be decimal, octal, or
hexadecimal, that is, a leading 0x or 0X implies hexadecimal, as specified in
the \fIISO C\fR standard; otherwise, a leading 0 implies octal; otherwise, the
number is interpreted as decimal.
.SH USAGE
.sp
.LP
The return value of \fBinet_ntoa()\fR may point to static data that may be
overwritten by subsequent calls to \fBinet_ntoa()\fR.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fBinet_addr()\fR returns the Internet address.
Otherwise, it returns (\fBin_addr_t\fR)(\(mi1).
.sp
.LP
Upon successful completion, \fBinet_network()\fR returns the converted Internet
network number. Otherwise, it returns (\fBin_addr_t\fR)(\(mi1).
.sp
.LP
The \fBinet_makeaddr()\fR function returns the constructed Internet address.
.sp
.LP
The \fBinet_lnaof()\fR function returns the local network address part.
.sp
.LP
The \fBinet_netof()\fR function returns the network number.
.sp
.LP
The \fBinet_ntoa()\fR function returns a pointer to the network address in
Internet-standard dot notation.
.SH ERRORS
.sp
.LP
No errors are defined.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp
.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
_
Interface Stability Standard
_
MT-Level MT-Safe
.TE
.SH SEE ALSO
.sp
.LP
\fBendhostent\fR(3XNET), \fBendnetent\fR(3XNET), \fBattributes\fR(5),
\fBstandards\fR(5)
|
