129 lines
4.6 KiB
HTML
129 lines
4.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title><arpa/inet.h></title>
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</head>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../../jscript/dotcode.js">
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<basefont size="3"> <a name="<arpa/inet.h>"></a> <a name="tag_13_03"></a><!-- <arpa/inet.h> -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_13_03_01"></a>NAME</h4>
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<blockquote>arpa/inet.h - definitions for internet operations</blockquote>
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<h4><a name="tag_13_03_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><tt>#include <arpa/inet.h></tt></p>
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</blockquote>
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<h4><a name="tag_13_03_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <b>in_port_t</b> and <b>in_addr_t</b> types shall be defined as described in <a href=
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"../netinet/in.h.html#tag_13_32"><i><netinet/in.h></i></a> .</p>
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<p>The <b>in_addr</b> structure shall be defined as described in <a href=
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"../netinet/in.h.html#tag_13_32"><i><netinet/in.h></i></a> .</p>
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<p>The INET_ADDRSTRLEN <sup>[<a href="javascript:open_code('IP6')">IP6</a>]</sup> <img src="../../images/opt-start.gif" alt=
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"[Option Start]" border="0"> and INET6_ADDRSTRLEN <img src="../../images/opt-end.gif" alt="[Option End]" border="0"> macros
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shall be defined as described in <a href="../netinet/in.h.html#tag_13_32"><i><netinet/in.h></i></a> .</p>
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<p>The following shall either be declared as functions, defined as macros, or both. If functions are declared, function prototypes
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shall be provided.</p>
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<pre>
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<tt>uint32_t htonl(uint32_t);
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uint16_t htons(uint16_t);
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uint32_t ntohl(uint32_t);
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uint16_t ntohs(uint16_t);
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</tt>
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</pre>
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<p>The <b>uint32_t</b> and <b>uint16_t</b> types shall be defined as described in <a href=
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"../inttypes.h.html#tag_13_20"><i><inttypes.h></i></a> .</p>
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<p>The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.</p>
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<pre>
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<tt>in_addr_t inet_addr(const char *);
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char *inet_ntoa(struct in_addr);
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const char *inet_ntop(int, const void *restrict, char *restrict,
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socklen_t);
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int inet_pton(int, const char *restrict, void *restrict);
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</tt>
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</pre>
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<p>Inclusion of the <i><arpa/inet.h></i> header may also make visible all symbols from <a href=
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"../../basedefs/netinet/in.h.html"><i><netinet/in.h></i></a> and <a href=
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"../../basedefs/inttypes.h.html"><i><inttypes.h></i></a>.</p>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_13_03_04"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_03_05"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_03_06"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_03_07"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="../netinet/in.h.html#tag_13_32"><i><netinet/in.h></i></a> , <a href=
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"../inttypes.h.html#tag_13_20"><i><inttypes.h></i></a> , the System Interfaces volume of IEEE Std 1003.1-2001, <a
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href="../../functions/htonl.html"><i>htonl</i>()</a>, <a href="../../functions/inet_addr.html"><i>inet_addr</i>()</a></p>
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</blockquote>
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<h4><a name="tag_13_03_08"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 6. Derived from the XNS, Issue 5.2 specification.</p>
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<p>The <b>restrict</b> keyword is added to the prototypes for <a href="../../functions/inet_ntop.html"><i>inet_ntop</i>()</a> and
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<a href="../../functions/inet_pton.html"><i>inet_pton</i>()</a>.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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