119 lines
6.0 KiB
HTML
119 lines
6.0 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="AF_INET6 address family" />
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<meta name="abstract" content="This address family provides support for the Internet Protocol version 6 (IPv6). AF_INET6 address family uses a 128 bit (16 byte) address." />
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<meta name="description" content="This address family provides support for the Internet Protocol version 6 (IPv6). AF_INET6 address family uses a 128 bit (16 byte) address." />
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<meta name="DC.Relation" scheme="URI" content="address.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="cafinet6" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>AF_INET6 address family</title>
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</head>
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<body id="cafinet6"><a name="cafinet6"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">AF_INET6 address family</h1>
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<div><p>This address family provides support for the Internet Protocol
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version 6 (IPv6). AF_INET6 address family uses a 128 bit (16 byte) address.</p>
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<div class="section"><p>The basic architecture of these addresses includes
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64 bits for a network number and another 64 bits for the host number. You
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can specify AF_INET6 addresses as x:x:x:x:x:x:x:x, where the x's
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are the hexadecimal values of eight 16–bit pieces of the address. For example,
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a valid address looks like this: FEDC:BA98:7654:3210:FEDC:BA98:7654:3210.</p>
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</div>
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<div class="section"><p>For a socket application that uses TCP, User Datagram Protocol
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(UDP) or RAW, the AF_INET6 address family uses the sockaddr_in6 address structure.
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This address structure changes if you use _XOPEN_SOURCE macro to implement
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BSD 4.4/ UNIX<sup>®</sup> 98
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specifications. For the sockaddr_in6 address structure, these differences
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are summarized in this table:</p>
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</div>
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<div class="section"><div class="p">
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 1. Differences between BSD 4.3 and BSD 4.4/ UNIX 98 for sockaddr_in6
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address structure</caption><thead align="left"><tr><th valign="top" id="d0e35">BSD 4.3 sockaddr_in6 address structure</th>
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<th valign="top" id="d0e37">BSD 4.4/ UNIX 98 sockaddr_in6 address structure</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e35 "> <pre> struct sockaddr_in6 {
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sa_family_t sin6_family;
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in_port_t sin6_port;
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uint32_t sin6_flowinfo;
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struct in6_addr sin6_addr;
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uint32_t sin6_scope_id;
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};</pre>
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</td>
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<td valign="top" headers="d0e37 "> <pre> struct sockaddr_in6 {
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uint8_t sin6_len;
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sa_family_t sin6_family;
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in_port_t sin6_port;
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uint32_t sin6_flowinfo;
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struct in6_addr sin6_addr;
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uint32_t sin6_scope_id;
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};</pre>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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<div class="section"><div class="p">
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 2. AF_INET6 address structure </caption><thead align="left"><tr><th valign="top" id="d0e63">Address structure field</th>
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<th valign="top" id="d0e65">Definition</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e63 ">sin6_len</td>
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<td valign="top" headers="d0e65 ">This field contains the length of the address for UNIX 98
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specifications. <div class="note"><span class="notetitle">Note:</span> The: sin6_len field is only provided for BSD 4.4 compatibility.
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It is not necessary to use this field even when using BSD 4.4/ UNIX 98 compatibility.
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The field is ignored on input addresses.</div>
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</td>
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</tr>
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<tr><td valign="top" headers="d0e63 ">sin6_family</td>
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<td valign="top" headers="d0e65 ">This field specifies the AF_INET6 address family.</td>
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</tr>
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<tr><td valign="top" headers="d0e63 ">sin6_port</td>
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<td valign="top" headers="d0e65 ">This field contains the transport layer port.</td>
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</tr>
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<tr><td valign="top" headers="d0e63 ">sin6_flowinfo</td>
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<td valign="top" headers="d0e65 ">This field contains two pieces of information: the traffic
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class and the flow label. <div class="note"><span class="notetitle">Note:</span> This field is currently not supported and
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should be set to zero for upward compatibility.</div>
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</td>
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</tr>
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<tr><td valign="top" headers="d0e63 ">sin6_addr</td>
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<td valign="top" headers="d0e65 ">This field specifies the IPv6 address.</td>
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</tr>
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<tr><td valign="top" headers="d0e63 ">sin6_scope_id</td>
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<td valign="top" headers="d0e65 "><p>This field identifies a set of interfaces
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as appropriate for the scope of the address carried in the <strong>sin6_addr</strong> field.</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="address.htm" title="The address family parameter on a socket() determines the format of the address structure to use on socket functions.">Socket address family</a></div>
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</div>
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</div>
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</body>
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</html>
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