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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title><arpa/inet.h></title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4>NAME</h4><blockquote>arpa/inet.h - definitions for internet operations</blockquote><h4>SYNOPSIS</h4><blockquote><pre><code>#include <arpa/inet.h></code></pre></blockquote><h4>DESCRIPTION</h4><blockquote>The <<B>arpa/inet.h</B>> header makes available the type <B>in_port_t</B>and the type <B>in_addr_t</B> as defined in the description of<i><a href="netinetin.h.html"><netinet/in.h></a></i>.<p>The <<B>arpa/inet.h</B>> header makes available the <B>in_addr</B> structure,as defined in the description of <i><a href="netinetin.h.html"><netinet/in.h></a></i>.<p>The following may be declared as functions, or defined as macros, or both:<p><pre><code>uint32_t htonl(uint32_t hostlong);uint16_t htons(uint16_t hostshort);uint32_t ntohl(uint32_t netlong);uint16_t ntohs(uint16_t netshort);</code></pre><p>The <B>uint32_t</B>and <B>uint16_t</B>types are made available by inclusion of<i><a href="../xsh/inttypes.h.html"><inttypes.h></a></i>(see referenced document<B>XSH</B>).<p>The following are declared as functions, and may also be defined as macros:<pre><code>in_addr_t <a href="inet_addr.html">inet_addr</a>(const char *<I>cp</I>);in_addr_t <a href="inet_lnaof.html">inet_lnaof</a>(struct in_addr <I>in</I>);struct in_addr <a href="inet_makeaddr.html">inet_makeaddr</a>(in_addr_t <I>net</I>, in_addr_t <I>lna</I>);in_addr_t <a href="inet_netof.html">inet_netof</a>(struct in_addr <I>in</I>);in_addr_t <a href="inet_network.html">inet_network</a>(const char *<I>cp</I>);char *<a href="inet_ntoa.html">inet_ntoa</a>(struct in_addr <I>in</I>);</code></pre>Inclusion of the<i><a href="arpainet.h.html"><arpa/inet.h></a></i>header may also make visible all symbols from<i><a href="netinetin.h.html"><netinet/in.h></a></i>and<i><a href="../xsh/inttypes.h.html"><inttypes.h></a></i>.</blockquote><h4>SEE ALSO</h4><blockquote><i><a href="htonl.html">htonl()</a></i>,<i><a href="inet_addr.html">inet_addr()</a></i>,<i><a href="netinetin.h.html"><netinet/in.h></a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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