iank
/
libreCMC
biforcado de libreCMC/libreCMC


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934
							<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
    <title>Reference</title>
    <link rel="stylesheet" href="../luadoc.css" type="text/css" />
	<!--meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/-->
</head>

<body>
<div id="container">

<div id="product">
	<div id="product_logo"></div>
	<div id="product_name"><big><b></b></big></div>
	<div id="product_description"></div>
</div> <!-- id="product" -->

<div id="main">

<div id="navigation">


<h1>LuaDoc</h1>
<ul>
	
	<li><a href="../index.html">Index</a></li>
	
</ul>


<!-- Module list -->

<h1>Modules</h1>
<ul>

	<li>
		<a href="../modules/luci.dispatcher.html">luci.dispatcher</a>
	</li>

	<li>
		<a href="../modules/luci.http.html">luci.http</a>
	</li>

	<li>
		<a href="../modules/luci.http.protocol.html">luci.http.protocol</a>
	</li>

	<li>
		<a href="../modules/luci.http.protocol.conditionals.html">luci.http.protocol.conditionals</a>
	</li>

	<li>
		<a href="../modules/luci.http.protocol.date.html">luci.http.protocol.date</a>
	</li>

	<li>
		<a href="../modules/luci.http.protocol.mime.html">luci.http.protocol.mime</a>
	</li>

	<li>
		<a href="../modules/luci.i18n.html">luci.i18n</a>
	</li>

	<li><strong>luci.ip</strong></li>
	
	<li>
		<a href="../modules/luci.ip.cidr.html">luci.ip.cidr</a>
	</li>

	<li>
		<a href="../modules/luci.json.html">luci.json</a>
	</li>

	<li>
		<a href="../modules/luci.jsonc.html">luci.jsonc</a>
	</li>

	<li>
		<a href="../modules/luci.jsonc.parser.html">luci.jsonc.parser</a>
	</li>

	<li>
		<a href="../modules/luci.model.ipkg.html">luci.model.ipkg</a>
	</li>

	<li>
		<a href="../modules/luci.model.uci.html">luci.model.uci</a>
	</li>

	<li>
		<a href="../modules/luci.rpcc.html">luci.rpcc</a>
	</li>

	<li>
		<a href="../modules/luci.rpcc.ruci.html">luci.rpcc.ruci</a>
	</li>

	<li>
		<a href="../modules/luci.sys.html">luci.sys</a>
	</li>

	<li>
		<a href="../modules/luci.sys.init.html">luci.sys.init</a>
	</li>

	<li>
		<a href="../modules/luci.sys.iptparser.html">luci.sys.iptparser</a>
	</li>

	<li>
		<a href="../modules/luci.sys.net.html">luci.sys.net</a>
	</li>

	<li>
		<a href="../modules/luci.sys.process.html">luci.sys.process</a>
	</li>

	<li>
		<a href="../modules/luci.sys.user.html">luci.sys.user</a>
	</li>

	<li>
		<a href="../modules/luci.sys.wifi.html">luci.sys.wifi</a>
	</li>

	<li>
		<a href="../modules/luci.util.html">luci.util</a>
	</li>

	<li>
		<a href="../modules/nixio.html">nixio</a>
	</li>

	<li>
		<a href="../modules/nixio.CHANGELOG.html">nixio.CHANGELOG</a>
	</li>

	<li>
		<a href="../modules/nixio.CryptoHash.html">nixio.CryptoHash</a>
	</li>

	<li>
		<a href="../modules/nixio.File.html">nixio.File</a>
	</li>

	<li>
		<a href="../modules/nixio.README.html">nixio.README</a>
	</li>

	<li>
		<a href="../modules/nixio.Socket.html">nixio.Socket</a>
	</li>

	<li>
		<a href="../modules/nixio.TLSContext.html">nixio.TLSContext</a>
	</li>

	<li>
		<a href="../modules/nixio.TLSSocket.html">nixio.TLSSocket</a>
	</li>

	<li>
		<a href="../modules/nixio.UnifiedIO.html">nixio.UnifiedIO</a>
	</li>

	<li>
		<a href="../modules/nixio.bin.html">nixio.bin</a>
	</li>

	<li>
		<a href="../modules/nixio.bit.html">nixio.bit</a>
	</li>

	<li>
		<a href="../modules/nixio.crypto.html">nixio.crypto</a>
	</li>

	<li>
		<a href="../modules/nixio.fs.html">nixio.fs</a>
	</li>

</ul>


<!-- File list -->


</div><!-- id="navigation" -->

<div id="content">

<h1>Class <code>luci.ip</code></h1>

<p>
 LuCI IP calculation and netlink access library.</p>


<h2>Functions</h2>
<table class="function_list">

	<tr>
	<td class="name" nowrap><a href="#new">new</a>&nbsp;(address, netmask)</td>
	<td class="summary">
 
Construct a new luci.ip.cidr instance and autodetect the address family.</td>
	</tr>

	<tr>
	<td class="name" nowrap><a href="#IPv4">IPv4</a>&nbsp;(address, netmask)</td>
	<td class="summary">
 
Construct a new IPv4 luci.ip.cidr instance.</td>
	</tr>

	<tr>
	<td class="name" nowrap><a href="#IPv6">IPv6</a>&nbsp;(address, netmask)</td>
	<td class="summary">
 
Construct a new IPv6 luci.ip.cidr instance.</td>
	</tr>

	<tr>
	<td class="name" nowrap><a href="#route">route</a>&nbsp;(address)</td>
	<td class="summary">
 
Determine the route leading to the given destination.</td>
	</tr>

	<tr>
	<td class="name" nowrap><a href="#routes">routes</a>&nbsp;(filter, callback)</td>
	<td class="summary">
 
Fetch all routes, optionally matching the given criteria.</td>
	</tr>

	<tr>
	<td class="name" nowrap><a href="#neighbors">neighbors</a>&nbsp;(filter, callback)</td>
	<td class="summary">
 
Fetches entries from the IPv4 ARP and IPv6 neighbour kernel table </td>
	</tr>

	<tr>
	<td class="name" nowrap><a href="#link">link</a>&nbsp;(device)</td>
	<td class="summary">
 
Fetch basic device information </td>
	</tr>

</table>


<br/>
<br/>


<h2><a name="functions"></a>Functions</h2>
<dl class="function">


<dt><a name="new"></a><strong>new</strong>&nbsp;(address, netmask)</dt>
<dd>

 
Construct a new luci.ip.cidr instance and autodetect the address family. 
Throws an error if the given strings do not represent a valid address or 
if the given optional netmask is of a different family.


<h3>Parameters</h3>
<ul>
	
	<li>
	  address: String containing a valid IPv4 or IPv6 address, optionally 
with prefix size (CIDR notation) or netmask separated by slash.
	</li>
	
	<li>
	  netmask: String containing a valid IPv4 or IPv6 netmask or number 
containing a prefix size in bits (<code>0..32</code> for IPv4, 
<code>0..128</code> for IPv6). Overrides mask embedded in the first argument 
if specified. (optional)
	</li>
	
</ul>


<h3>Usage:</h3>
<pre>addr = luci.ip.new("10.24.0.1/24") 
addr = luci.ip.new("10.24.0.1/255.255.255.0") 
addr = luci.ip.new("10.24.0.1", "255.255.255.0")        -- separate netmask 
addr = luci.ip.new("10.24.0.1/24", 16)                  -- override netmask 
 
addr6 = luci.ip.new("fe80::221:63ff:fe75:aa17/64") 
addr6 = luci.ip.new("fe80::221:63ff:fe75:aa17/ffff:ffff:ffff:ffff::") 
addr6 = luci.ip.new("fe80::221:63ff:fe75:aa17", "ffff:ffff:ffff:ffff::") 
addr6 = luci.ip.new("fe80::221:63ff:fe75:aa17/64", 128) -- override netmask</pre>


<h3>Return value:</h3>
A <code>luci.ip.cidr</code> object representing the given 
address/mask range.


<h3>See also:</h3>
<ul>
	
	<li><a href="#IPv4">
		IPv4
	</a>
	
	<li><a href="#IPv6">
		IPv6
	</a>
	
</ul>

</dd>


<dt><a name="IPv4"></a><strong>IPv4</strong>&nbsp;(address, netmask)</dt>
<dd>

 
Construct a new IPv4 luci.ip.cidr instance. 
Throws an error if the given string does not represent a valid IPv4 address or 
if the given optional netmask is of a different family.


<h3>Parameters</h3>
<ul>
	
	<li>
	  address: String containing a valid IPv4, optionally with prefix size 
(CIDR notation) or netmask separated by slash.
	</li>
	
	<li>
	  netmask: String containing a valid IPv4 netmask or number 
containing a prefix size between <code>0</code> and <code>32</code> bit. 
Overrides mask embedded in the first argument if specified. (optional)
	</li>
	
</ul>


<h3>Usage:</h3>
<pre>addr = luci.ip.IPv4("10.24.0.1/24") 
addr = luci.ip.IPv4("10.24.0.1/255.255.255.0") 
addr = luci.ip.IPv4("10.24.0.1", "255.255.255.0")        -- separate netmask 
addr = luci.ip.IPv4("10.24.0.1/24", 16)                  -- override netmask</pre>


<h3>Return value:</h3>
A <code>luci.ip.cidr</code> object representing the given IPv4 range.


<h3>See also:</h3>
<ul>
	
	<li><a href="#IPv6">
		IPv6
	</a>
	
</ul>

</dd>


<dt><a name="IPv6"></a><strong>IPv6</strong>&nbsp;(address, netmask)</dt>
<dd>

 
Construct a new IPv6 luci.ip.cidr instance. 
Throws an error if the given string does not represent a valid IPv6 address or 
if the given optional netmask is of a different family.


<h3>Parameters</h3>
<ul>
	
	<li>
	  address: String containing a valid IPv6, optionally with prefix size 
(CIDR notation) or netmask separated by slash.
	</li>
	
	<li>
	  netmask: String containing a valid IPv4 netmask or number 
containing a prefix size between <code>0</code> and <code>128</code> bit. 
Overrides mask embedded in the first argument if specified. (optional)
	</li>
	
</ul>


<h3>Usage:</h3>
<pre>addr6 = luci.ip.IPv6("fe80::221:63ff:fe75:aa17/64") 
addr6 = luci.ip.IPv6("fe80::221:63ff:fe75:aa17/ffff:ffff:ffff:ffff::") 
addr6 = luci.ip.IPv6("fe80::221:63ff:fe75:aa17", "ffff:ffff:ffff:ffff::") 
addr6 = luci.ip.IPv6("fe80::221:63ff:fe75:aa17/64", 128) -- override netmask</pre>


<h3>Return value:</h3>
A <code>luci.ip.cidr</code> object representing the given IPv6 range.


<h3>See also:</h3>
<ul>
	
	<li><a href="#IPv4">
		IPv4
	</a>
	
</ul>

</dd>


<dt><a name="route"></a><strong>route</strong>&nbsp;(address)</dt>
<dd>

 
Determine the route leading to the given destination.


<h3>Parameters</h3>
<ul>
	
	<li>
	  address: A <code>luci.ip.cidr</code> instance or a string containing 
a valid IPv4 or IPv6 range as specified by <code>luci.ip.new()</code>.
	</li>
	
</ul>


<h3>Usage:</h3>
<ul> 
<li>Find default gateway by getting route to Google's public NS server 
<pre>rt = luci.ip.route("8.8.8.8") 
if rt ~= nil then 
	print("gateway is", rt.gw) 
end</pre></li> 
<li>Determine IPv6 upstream interface <pre>rt = luci.ip.route("2001::/7") 
if rt ~= nil then 
	print("ipv6 upstream device is", rt.dev) 
end</pre></li> 
</ul>


<h3>Return value:</h3>
<p>Table containing the fields described below.</p> 
<table id="routetable"> 
<tr><th>Field</th><th>Description</th></tr> 
<tr><td><code>type</code><td> 
  <p>Route type with one of the following numeric values:</p> 
  <table> 
  <tr> 
	<td><code>1</code></td> 
	<td><code>RTN_UNICAST</code> - Gateway or direct route</td> 
  </tr> 
  <tr> 
	<td><code>2</code></td> 
	<td><code>RTN_LOCAL</code> - Accept locally</td> 
  </tr> 
  <tr> 
	<td><code>3</code></td> 
	<td><code>RTN_BROADCAST</code> - 
	    Accept locally as broadcast send as broadcast</td> 
  </tr> 
  <tr> 
	<td><code>4</code></td> 
	<td><code>RTN_ANYCAST</code> - 
        Accept locally as broadcast but send as unicast</td> 
  </tr> 
  <tr> 
	<td><code>5</code></td> 
	<td><code>RTN_MULTICAST</code> - Multicast route</td> 
  </tr> 
  </table> 
</td></tr> 
<tr> 
  <td><code>family</code></td> 
  <td>Number containing the route family, <code>4</code> for IPv4 or 
      <code>6</code> for IPv6</td> 
</tr> 
<tr> 
  <td><code>dest</code></td> 
  <td>Destination <code>luci.ip.cidr</code> instance</td> 
</tr> 
<tr> 
  <td><code>gw</code></td> 
  <td>Gateway <code>luci.ip.cidr</code> instance (optional)</td> 
</tr> 
<tr> 
  <td><code>from</code></td> 
  <td>Source address <code>luci.ip.cidr</code> instance (optional)</td> 
</tr> 
<tr> 
  <td><code>src</code></td> 
  <td>Preferred source <code>luci.ip.cidr</code> instance (optional)</td> 
</tr> 
<tr> 
  <td><code>dev</code></td> 
  <td>String containing the name of the outgoing interface</td> 
</tr> 
<tr> 
  <td><code>iif</code></td> 
  <td>String containing the name of the incoming interface (optional)</td> 
</tr> 
<tr> 
  <td><code>table</code></td> 
  <td>Number of the associated routing table (<code>0..65535</code>)</td> 
</tr> 
<tr> 
  <td><code>proto</code></td> 
  <td>Number of the associated routing protocol</td> 
</tr> 
<tr> 
  <td><code>scope</code></td> 
  <td>Number describing the scope of the route, most commonly 
      <code>0</code> for global or <code>253</code> for on-link</td> 
</tr> 
<tr> 
  <td><code>metric</code></td> 
  <td>Number describing the route metric (optional)</td> 
</tr> 
<tr> 
  <td><code>expires</code></td> 
  <td>Number of seconds the prefix is valid (IPv6 only, optional)</td> 
</tr> 
<tr> 
  <td><code>error</code></td> 
  <td>Route destination error code (optional)</td> 
</tr> 
</table>


<h3>See also:</h3>
<ul>
	
	<li><a href="#routes">
		routes
	</a>
	
</ul>

</dd>


<dt><a name="routes"></a><strong>routes</strong>&nbsp;(filter, callback)</dt>
<dd>

 
Fetch all routes, optionally matching the given criteria.


<h3>Parameters</h3>
<ul>
	
	<li>
	  filter: <p>Table containing one or more of the possible filter 
critera described below (optional)</p><table> 
<tr><th>Field</th><th>Description</th></tr> 
<tr><td><code>family</code></td><td> 
 Number describing the address family to return - <code>4</code> selects 
 IPv4 routes, <code>6</code> IPv6 ones. Any other value selects both. 
</td></tr> 
<tr><td><code>iif</code></td><td> 
 String containing the incoming route interface to match. 
</td></tr> 
<tr><td><code>oif</code></td><td> 
 String containing the outgoing route interface to match. 
</td></tr> 
<tr><td><code>type</code></td><td> 
 Numeric type to match, e.g. <code>1</code> for unicast. 
</td></tr> 
<tr><td><code>scope</code></td><td> 
 Numeric scope to match, e.g. <code>253</code> for onlink. 
</td></tr> 
<tr><td><code>proto</code></td><td> 
 Numeric protocol to match, e.g. <code>2</code> for boot. 
</td></tr> 
<tr><td><code>table</code></td><td> 
 Numeric routing table to match (<code>0..65535</code>). 
</td></tr> 
<tr><td><code>gw</code></td><td> 
 String containing the gateway address to match. Can be in any notation 
 specified by <code>luci.ip.new()</code>. Prefix matching is performed when 
 comparing the routes, e.g. "192.168.1.0/24" would select routes with gateway 
 addresses <code>192.168.1.1 .. 192.168.1.255</code>. 
</td></tr> 
<tr><td><code>dest</code></td><td> 
 String containing the destination to match. Prefix matching is performed. 
</td></tr> 
<tr><td><code>from</code></td><td> 
 String containing the source address to match. Prefix matching is performed. 
</td></tr> 
<tr><td><code>src</code></td><td> 
 String containing the preferred source address to match. 
 Prefix matching is performed. 
</td></tr> 
<tr><td><code>dest_exact</code></td><td> 
 String containing the destination to match. Exact matching is performed, 
 e.g. <code>dest = "0.0.0.0/0"</code> would match <em>any</em> IPv4 route 
 while <code>dest_exact = "0.0.0.0/0"</code> will <em>only</em> match the 
 default route. 
</td></tr> 
<tr><td><code>from_exact</code></td><td> 
 String containing the source address to match. Exact matching is performed. 
</td></tr> 
</table>
	</li>
	
	<li>
	  callback: <p>Callback function to invoke for each found route 
instead of returning one table of route objects (optional)</p>
	</li>
	
</ul>


<h3>Usage:</h3>
<ul> 
<li>Find all IPv4 default routes: 
<pre>luci.ip.routes({ dest_exact = "0.0.0.0/0" }, function(rt) 
	print(rt.type, rt.gw, rt.dev) 
end)</pre></li> 
<li>Find all global IPv6 prefixes on the current system: 
<pre>luci.ip.routes({ from = "2001::/7" }, function(rt) 
	print(rt.from) 
end)</pre></li> 
<li>Fetch all IPv4 routes: 
<pre>routes = luci.ip.routes({ family = 4 }) 
for _, rt in ipairs(routes) do 
	print(rt.dest, rt.gw, rt.dev) 
end</pre></li> 
</ul>


<h3>Return value:</h3>
If no callback function is provided, a table of routes 
<a href="#routetable">as specified by <code>luci.ip.route()</code></a> 
is returned. If a callback function is given, it is invoked for each route 
and nothing is returned.


<h3>See also:</h3>
<ul>
	
	<li><a href="#route">
		route
	</a>
	
</ul>

</dd>


<dt><a name="neighbors"></a><strong>neighbors</strong>&nbsp;(filter, callback)</dt>
<dd>

 
Fetches entries from the IPv4 ARP and IPv6 neighbour kernel table


<h3>Parameters</h3>
<ul>
	
	<li>
	  filter: <p>Table containing one or more of the possible filter 
critera described below (optional)</p><table> 
<tr><th>Field</th><th>Description</th></tr> 
<tr><td><code>family</code></td><td> 
 Number describing the address family to return - <code>4</code> selects 
 IPv4 ARP, <code>6</code> select IPv6 neighbour entries. Any other value 
 selects both. 
</td></tr> 
<tr><td><code>dev</code></td><td> 
 String containing the associated interface to match. 
</td></tr> 
<tr><td><code>dest</code></td><td> 
 String containing the associated address to match. Can be in any notation 
 specified by <code>luci.ip.new()</code>. Prefix matching is performed when 
 comparing the addresses, e.g. "192.168.1.0/24" would select ARP entries 
 for <code>192.168.1.1 .. 192.168.1.255</code>. 
</td></tr> 
<tr><td><code>mac</code></td><td> 
 String containing MAC address to match. 
</td></tr> 
</table>
	</li>
	
	<li>
	  callback: <p>Callback function to invoke for each found neighbour 
entry instead of returning one table of neighbour entries (optional)</p>
	</li>
	
</ul>


<h3>Usage:</h3>
<ul> 
<li>Find all ARP neighbours in the LAN: 
<pre>luci.ip.neighbors({ dest = "192.168.0.0/16" }, function(n) 
	print(n.dest, n.mac) 
end)</pre></li> 
<li>Find all active IPv6 addresses of host with given MAC: 
<pre>luci.ip.neighbors({ family = 6, mac = "00:21:63:75:aa:17" }, 
	function(n) 
		print(n.dest) 
	end)</pre></li> 
</ul>


<h3>Return value:</h3>
If no callback function is provided, a table of neighbour entries 
is returned. If a callback function is given, it is invoked for each entry 
and nothing is returned. 
 
A neighbour entry is a table containing the following fields: 
 
<table> 
<tr><th>Field</th><th>Description</th></tr> 
<tr> 
  <td><code>family</code></td> 
  <td>Number containing the neighbour entry family, <code>4</code> for IPv4 
      ARP or <code>6</code> for IPv6 NDP</td> 
</tr> 
<tr> 
  <td><code>dev</code></td> 
  <td>String containing the associated device of the neighbour entry</td> 
</tr> 
<tr> 
  <td><code>dest</code></td> 
  <td>IP address <code>luci.ip.cidr</code> instance</td> 
</tr> 
<tr> 
  <td><code>mac</code></td> 
  <td>String containing the associated MAC address</td> 
</tr> 
<tr> 
  <td><code>router</code></td> 
  <td>Boolean "true" if the neighbour entry is a router (IPv6, optional)</td> 
</tr> 
<tr> 
  <td><code>proxy</code></td> 
  <td>Boolean "true" if this is a proxy entry (optional)</td> 
</tr> 
<tr> 
  <td><code>incomplete</code></td> 
  <td>Boolean "true" if the entry is in incomplete state (optional)</td> 
</tr> 
<tr> 
  <td><code>reachable</code></td> 
  <td>Boolean "true" if the entry is in reachable state (optional)</td> 
</tr> 
<tr> 
  <td><code>stale</code></td> 
  <td>Boolean "true" if the entry is stale (optional)</td> 
</tr> 
<tr> 
  <td><code>delay</code></td> 
  <td>Boolean "true" if the entry is delayed (optional)</td> 
</tr> 
<tr> 
  <td><code>probe</code></td> 
  <td>Boolean "true" if the entry is in probe state (optional)</td> 
</tr> 
<tr> 
  <td><code>failed</code></td> 
  <td>Boolean "true" if the entry is in failed state (optional)</td> 
</tr> 
<tr> 
  <td><code>noarp</code></td> 
  <td>Boolean "true" if the entry is not caused by NDP or 
      ARP (optional)</td> 
</tr> 
<tr> 
  <td><code>permanent</code></td> 
  <td>Boolean "true" if the entry was statically configured from 
      userspace (optional)</td> 
</tr> 
</table>


</dd>


<dt><a name="link"></a><strong>link</strong>&nbsp;(device)</dt>
<dd>

 
Fetch basic device information


<h3>Parameters</h3>
<ul>
	
	<li>
	  device: String containing the network device to query
	</li>
	
</ul>


<h3>Usage:</h3>
<ul> 
<li>Test whether device br-lan exists: 
<pre>print(luci.ip.link("br-lan").name ~= nil) 
</pre></li> 
<li>Query MAC address of eth0: 
<pre>print(luci.ip.link("eth0").mac) 
</pre></li> 
</ul>


<h3>Return value:</h3>
If the given interface is found, a table containing the fields 
described below is returned, else an empty table. 
 
<table> 
<tr><th>Field</th><th>Description</th></tr> 
<tr> 
  <td><code>up</code></td> 
  <td>Boolean indicating whether the device is in IFF_RUNNING state</td> 
</tr> 
<tr> 
  <td><code>type</code></td> 
  <td>Numeric value indicating the type of the device, e.g. <code>1</code> 
      for ethernet.</td> 
</tr> 
<tr> 
  <td><code>name</code></td> 
  <td>String containing the name of the device</td> 
</tr> 
<tr> 
  <td><code>master</code></td> 
  <td>If queried device is a bridge port, string containing the name of 
      parent bridge device (optional)</td> 
</tr> 
<tr> 
  <td><code>mtu</code></td> 
  <td>Number containing the current MTU of the device</td> 
</tr> 
<tr> 
  <td><code>qlen</code></td> 
  <td>Number containing the TX queue length of the device</td> 
</tr> 
<tr> 
  <td><code>mac</code></td> 
  <td>String containing the link local address of the device in 
      dotted hex notation</td> 
</tr> 
</table>


</dd>


</dl>


</div> <!-- id="content" -->

</div> <!-- id="main" -->

<div id="about">
	<p><a href="http://validator.w3.org/check?uri=referer"><img src="http://www.w3.org/Icons/valid-xhtml10" alt="Valid XHTML 1.0!" height="31" width="88" /></a></p>
</div> <!-- id="about" -->

</div> <!-- id="container" -->
</body>
</html>