223 lines
8.6 KiB
HTML
223 lines
8.6 KiB
HTML
|
<?xml version="1.0" encoding="utf-8" ?>
|
||
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="generator" content="Docutils 0.10: http://docutils.sourceforge.net/" />
|
||
|
|
<title>Filter</title>
|
||
|
|
<meta name="author" content="Arvid Norberg, arvid@rasterbar.com" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="../../css/base.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="../../css/rst.css" />
|
||
|
|
<script type="text/javascript">
|
||
|
|
/* <![CDATA[ */
|
||
|
|
(function() {
|
||
|
|
var s = document.createElement('script'), t = document.getElementsByTagName('script')[0];
|
||
|
|
s.type = 'text/javascript';
|
||
|
|
s.async = true;
|
||
|
|
s.src = 'http://api.flattr.com/js/0.6/load.js?mode=auto';
|
||
|
|
t.parentNode.insertBefore(s, t);
|
||
|
|
})();
|
||
|
|
/* ]]> */
|
||
|
|
</script>
|
||
|
|
<link rel="stylesheet" href="style.css" type="text/css" />
|
||
|
|
<style type="text/css">
|
||
|
|
/* Hides from IE-mac \*/
|
||
|
|
* html pre { height: 1%; }
|
||
|
|
/* End hide from IE-mac */
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="document" id="filter">
|
||
|
|
<div id="container">
|
||
|
|
<div id="headerNav">
|
||
|
|
<ul>
|
||
|
|
<li class="first"><a href="/">Home</a></li>
|
||
|
|
<li><a href="../../products.html">Products</a></li>
|
||
|
|
<li><a href="../../contact.html">Contact</a></li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<div id="header">
|
||
|
|
<div id="orange"></div>
|
||
|
|
<div id="logo"></div>
|
||
|
|
</div>
|
||
|
|
<div id="main">
|
||
|
|
<h1 class="title">Filter</h1>
|
||
|
|
<table class="docinfo" frame="void" rules="none">
|
||
|
|
<col class="docinfo-name" />
|
||
|
|
<col class="docinfo-content" />
|
||
|
|
<tbody valign="top">
|
||
|
|
<tr><th class="docinfo-name">Author:</th>
|
||
|
|
<td>Arvid Norberg, <a class="last reference external" href="mailto:arvid@rasterbar.com">arvid@rasterbar.com</a></td></tr>
|
||
|
|
<tr><th class="docinfo-name">Version:</th>
|
||
|
|
<td>1.0.0</td></tr>
|
||
|
|
</tbody>
|
||
|
|
</table>
|
||
|
|
<div class="contents topic" id="table-of-contents">
|
||
|
|
<p class="topic-title first">Table of contents</p>
|
||
|
|
<ul class="simple">
|
||
|
|
<li><a class="reference internal" href="#ip-filter" id="id10">ip_filter</a></li>
|
||
|
|
<li><a class="reference internal" href="#port-filter" id="id11">port_filter</a></li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<a name="ip_filter"></a><div class="section" id="ip-filter">
|
||
|
|
<h1>ip_filter</h1>
|
||
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/ip_filter.hpp">libtorrent/ip_filter.hpp</a>"</p>
|
||
|
|
<p>The <tt class="docutils literal">ip_filter</tt> class is a set of rules that uniquely categorizes all
|
||
|
|
ip addresses as allowed or disallowed. The default constructor creates
|
||
|
|
a single rule that allows all addresses (0.0.0.0 - 255.255.255.255 for
|
||
|
|
the IPv4 range, and the equivalent range covering all addresses for the
|
||
|
|
IPv6 range).</p>
|
||
|
|
<p>A default constructed <a class="reference external" href="reference-Filter.html#ip_filter">ip_filter</a> does not filter any address.</p>
|
||
|
|
<pre class="literal-block">
|
||
|
|
struct ip_filter
|
||
|
|
{
|
||
|
|
void <strong>add_rule</strong> (address first, address last, int flags);
|
||
|
|
int <strong>access</strong> (address const& addr) const;
|
||
|
|
filter_tuple_t <strong>export_filter</strong> () const;
|
||
|
|
|
||
|
|
enum access_flags
|
||
|
|
{
|
||
|
|
blocked,
|
||
|
|
};
|
||
|
|
};
|
||
|
|
</pre>
|
||
|
|
<a name="add_rule()"></a><div class="section" id="add-rule">
|
||
|
|
<h2>add_rule()</h2>
|
||
|
|
<pre class="literal-block">
|
||
|
|
void <strong>add_rule</strong> (address first, address last, int flags);
|
||
|
|
</pre>
|
||
|
|
<p>Adds a rule to the filter. <tt class="docutils literal">first</tt> and <tt class="docutils literal">last</tt> defines a range of
|
||
|
|
ip addresses that will be marked with the given flags. The <tt class="docutils literal">flags</tt>
|
||
|
|
can currently be 0, which means allowed, or <tt class="docutils literal"><span class="pre">ip_filter::blocked</span></tt>, which
|
||
|
|
means disallowed.</p>
|
||
|
|
<p>precondition:
|
||
|
|
<tt class="docutils literal">first.is_v4() == last.is_v4() && first.is_v6() == last.is_v6()</tt></p>
|
||
|
|
<p>postcondition:
|
||
|
|
<tt class="docutils literal">access(x) == flags</tt> for every <tt class="docutils literal">x</tt> in the range [<tt class="docutils literal">first</tt>, <tt class="docutils literal">last</tt>]</p>
|
||
|
|
<p>This means that in a case of overlapping ranges, the last one applied takes
|
||
|
|
precedence.</p>
|
||
|
|
<a name="access()"></a></div>
|
||
|
|
<div class="section" id="access">
|
||
|
|
<h2>access()</h2>
|
||
|
|
<pre class="literal-block">
|
||
|
|
int <strong>access</strong> (address const& addr) const;
|
||
|
|
</pre>
|
||
|
|
<p>Returns the access permissions for the given address (<tt class="docutils literal">addr</tt>). The permission
|
||
|
|
can currently be 0 or <tt class="docutils literal"><span class="pre">ip_filter::blocked</span></tt>. The complexity of this operation
|
||
|
|
is O(<tt class="docutils literal">log</tt> n), where n is the minimum number of non-overlapping ranges to describe
|
||
|
|
the current filter.</p>
|
||
|
|
<a name="export_filter()"></a></div>
|
||
|
|
<div class="section" id="export-filter">
|
||
|
|
<h2>export_filter()</h2>
|
||
|
|
<pre class="literal-block">
|
||
|
|
filter_tuple_t <strong>export_filter</strong> () const;
|
||
|
|
</pre>
|
||
|
|
<p>This function will return the current state of the filter in the minimum number of
|
||
|
|
ranges possible. They are sorted from ranges in low addresses to high addresses. Each
|
||
|
|
<a class="reference external" href="reference-Bencoding.html#entry">entry</a> in the returned vector is a range with the access control specified in its
|
||
|
|
<tt class="docutils literal">flags</tt> field.</p>
|
||
|
|
<p>The return value is a tuple containing two range-lists. One for IPv4 addresses
|
||
|
|
and one for IPv6 addresses.</p>
|
||
|
|
<a name="access_flags"></a></div>
|
||
|
|
<div class="section" id="enum-access-flags">
|
||
|
|
<h2>enum access_flags</h2>
|
||
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/ip_filter.hpp">libtorrent/ip_filter.hpp</a>"</p>
|
||
|
|
<table border="1" class="docutils">
|
||
|
|
<colgroup>
|
||
|
|
<col width="12%" />
|
||
|
|
<col width="9%" />
|
||
|
|
<col width="78%" />
|
||
|
|
</colgroup>
|
||
|
|
<thead valign="bottom">
|
||
|
|
<tr><th class="head">name</th>
|
||
|
|
<th class="head">value</th>
|
||
|
|
<th class="head">description</th>
|
||
|
|
</tr>
|
||
|
|
</thead>
|
||
|
|
<tbody valign="top">
|
||
|
|
<tr><td>blocked</td>
|
||
|
|
<td>1</td>
|
||
|
|
<td>indicates that IPs in this range should not be connected
|
||
|
|
to nor accepted as incoming connections</td>
|
||
|
|
</tr>
|
||
|
|
</tbody>
|
||
|
|
</table>
|
||
|
|
<a name="port_filter"></a></div>
|
||
|
|
</div>
|
||
|
|
<div class="section" id="port-filter">
|
||
|
|
<h1>port_filter</h1>
|
||
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/ip_filter.hpp">libtorrent/ip_filter.hpp</a>"</p>
|
||
|
|
<p>the port filter maps non-overlapping port ranges to flags. This
|
||
|
|
is primarily used to indicate whether a range of ports should
|
||
|
|
be connected to or not. The default is to have the full port
|
||
|
|
range (0-65535) set to flag 0.</p>
|
||
|
|
<pre class="literal-block">
|
||
|
|
class port_filter
|
||
|
|
{
|
||
|
|
void <strong>add_rule</strong> (boost::uint16_t first, boost::uint16_t last, int flags);
|
||
|
|
int <strong>access</strong> (boost::uint16_t port) const;
|
||
|
|
|
||
|
|
enum access_flags
|
||
|
|
{
|
||
|
|
blocked,
|
||
|
|
};
|
||
|
|
};
|
||
|
|
</pre>
|
||
|
|
<a name="add_rule()"></a><div class="section" id="id6">
|
||
|
|
<h2>add_rule()</h2>
|
||
|
|
<pre class="literal-block">
|
||
|
|
void <strong>add_rule</strong> (boost::uint16_t first, boost::uint16_t last, int flags);
|
||
|
|
</pre>
|
||
|
|
<p>set the flags for the specified port range (<tt class="docutils literal">first</tt>, <tt class="docutils literal">last</tt>) to
|
||
|
|
<tt class="docutils literal">flags</tt> overwriting any existing rule for those ports. The range
|
||
|
|
is inclusive, i.e. the port <tt class="docutils literal">last</tt> also has the flag set on it.</p>
|
||
|
|
<a name="access()"></a></div>
|
||
|
|
<div class="section" id="id7">
|
||
|
|
<h2>access()</h2>
|
||
|
|
<pre class="literal-block">
|
||
|
|
int <strong>access</strong> (boost::uint16_t port) const;
|
||
|
|
</pre>
|
||
|
|
<p>test the specified port (<tt class="docutils literal">port</tt>) for whether it is blocked
|
||
|
|
or not. The returned value is the flags set for this port.
|
||
|
|
see acces_flags.</p>
|
||
|
|
<a name="access_flags"></a></div>
|
||
|
|
<div class="section" id="id8">
|
||
|
|
<h2>enum access_flags</h2>
|
||
|
|
<p>Declared in "<a class="reference external" href="../include/libtorrent/ip_filter.hpp">libtorrent/ip_filter.hpp</a>"</p>
|
||
|
|
<table border="1" class="docutils">
|
||
|
|
<colgroup>
|
||
|
|
<col width="13%" />
|
||
|
|
<col width="10%" />
|
||
|
|
<col width="76%" />
|
||
|
|
</colgroup>
|
||
|
|
<thead valign="bottom">
|
||
|
|
<tr><th class="head">name</th>
|
||
|
|
<th class="head">value</th>
|
||
|
|
<th class="head">description</th>
|
||
|
|
</tr>
|
||
|
|
</thead>
|
||
|
|
<tbody valign="top">
|
||
|
|
<tr><td>blocked</td>
|
||
|
|
<td>1</td>
|
||
|
|
<td>this flag indicates that destination ports in the
|
||
|
|
range should not be connected to</td>
|
||
|
|
</tr>
|
||
|
|
</tbody>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div id="footer">
|
||
|
|
<span>Copyright © 2005-2013 Rasterbar Software.</span>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
|
||
|
|
</script>
|
||
|
|
<script type="text/javascript">
|
||
|
|
_uacct = "UA-1599045-1";
|
||
|
|
urchinTracker();
|
||
|
|
</script>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|