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<h1>Class <code>luci.sys.net</code></h1>
<p>
LuCI system utilities / network related functions.
</p>
<h2>Functions</h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#call">call</a> (...)</td>
<td class="summary">
Execute a given shell command and return the error code
</td>
</tr>
<tr>
<td class="name" nowrap><a href="#dmesg">dmesg</a> ()</td>
<td class="summary">
Retrieves the output of the "dmesg" command.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#exec">exec</a> (command)</td>
<td class="summary">
Execute a given shell command and capture its standard output
</td>
</tr>
<tr>
<td class="name" nowrap><a href="#getenv">getenv</a> (var)</td>
<td class="summary">
Retrieve environment variables.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#hostname">hostname</a> (String)</td>
<td class="summary">
Get or set the current hostname.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#httpget">httpget</a> (url, stream, target)</td>
<td class="summary">
Returns the contents of a documented referred by an URL.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#mounts">mounts</a> ()</td>
<td class="summary">
Retrieve information about currently mounted file systems.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.arptable">arptable</a> ()</td>
<td class="summary">
Returns the current arp-table entries as two-dimensional table.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.conntrack">conntrack</a> ()</td>
<td class="summary">
Returns conntrack information
</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.deviceinfo">deviceinfo</a> ()</td>
<td class="summary">
Return information about available network interfaces.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.devices">devices</a> ()</td>
<td class="summary">
Determine the names of available network interfaces.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.ipv4_hints">ipv4_hints</a> ()</td>
<td class="summary">
Returns a two-dimensional table of IPv4 address hints.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.ipv6_hints">ipv6_hints</a> ()</td>
<td class="summary">
Returns a two-dimensional table of IPv6 address hints.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.mac_hints">mac_hints</a> ()</td>
<td class="summary">
Returns a two-dimensional table of mac address hints.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.pingtest">pingtest</a> (host)</td>
<td class="summary">
Tests whether the given host responds to ping probes.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.routes">routes</a> ()</td>
<td class="summary">
Returns the current kernel routing table entries.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#net.routes6">routes6</a> ()</td>
<td class="summary">
Returns the current ipv6 kernel routing table entries.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#reboot">reboot</a> ()</td>
<td class="summary">
Initiate a system reboot.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#syslog">syslog</a> ()</td>
<td class="summary">
Retrieves the output of the "logread" command.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#uniqueid">uniqueid</a> (bytes)</td>
<td class="summary">
Generates a random id with specified length.</td>
</tr>
<tr>
<td class="name" nowrap><a href="#uptime">uptime</a> ()</td>
<td class="summary">
Returns the current system uptime stats.</td>
</tr>
</table>
<br/>
<br/>
<h2><a name="functions"></a>Functions</h2>
<dl class="function">
<dt><a name="call"></a><strong>call</strong> (...)</dt>
<dd>
Execute a given shell command and return the error code
<h3>Parameters</h3>
<ul>
<li>
...: Command to call
</li>
</ul>
<h3>Return value:</h3>
Error code of the command
</dd>
<dt><a name="dmesg"></a><strong>dmesg</strong> ()</dt>
<dd>
Retrieves the output of the "dmesg" command.
<h3>Return value:</h3>
String containing the current log buffer
</dd>
<dt><a name="exec"></a><strong>exec</strong> (command)</dt>
<dd>
Execute a given shell command and capture its standard output
<h3>Parameters</h3>
<ul>
<li>
command: Command to call
</li>
</ul>
<h3>Return value:</h3>
String containg the return the output of the command
</dd>
<dt><a name="getenv"></a><strong>getenv</strong> (var)</dt>
<dd>
Retrieve environment variables. If no variable is given then a table
containing the whole environment is returned otherwise this function returns
the corresponding string value for the given name or nil if no such variable
exists.
<h3>Parameters</h3>
<ul>
<li>
var: Name of the environment variable to retrieve (optional)
</li>
</ul>
<h3>Return values:</h3>
<ol>
<li>String containg the value of the specified variable
<li>Table containing all variables if no variable name is given
</ol>
</dd>
<dt><a name="hostname"></a><strong>hostname</strong> (String)</dt>
<dd>
Get or set the current hostname.
<h3>Parameters</h3>
<ul>
<li>
String: containing a new hostname to set (optional)
</li>
</ul>
<h3>Return value:</h3>
String containing the system hostname
</dd>
<dt><a name="httpget"></a><strong>httpget</strong> (url, stream, target)</dt>
<dd>
Returns the contents of a documented referred by an URL.
<h3>Parameters</h3>
<ul>
<li>
url: The URL to retrieve
</li>
<li>
stream: Return a stream instead of a buffer
</li>
<li>
target: Directly write to target file name
</li>
</ul>
<h3>Return value:</h3>
String containing the contents of given the URL
</dd>
<dt><a name="mounts"></a><strong>mounts</strong> ()</dt>
<dd>
Retrieve information about currently mounted file systems.
<h3>Return value:</h3>
Table containing mount information
</dd>
<dt><a name="net.arptable"></a><strong>arptable</strong> ()</dt>
<dd>
Returns the current arp-table entries as two-dimensional table.
<h3>Return value:</h3>
Table of table containing the current arp entries.
The following fields are defined for arp entry objects:
{ "IP address", "HW address", "HW type", "Flags", "Mask", "Device" }
</dd>
<dt><a name="net.conntrack"></a><strong>conntrack</strong> ()</dt>
<dd>
Returns conntrack information
<h3>Return value:</h3>
Table with the currently tracked IP connections
</dd>
<dt><a name="net.deviceinfo"></a><strong>deviceinfo</strong> ()</dt>
<dd>
Return information about available network interfaces.
<h3>Return value:</h3>
Table containing all current interface names and their information
</dd>
<dt><a name="net.devices"></a><strong>devices</strong> ()</dt>
<dd>
Determine the names of available network interfaces.
<h3>Return value:</h3>
Table containing all current interface names
</dd>
<dt><a name="net.ipv4_hints"></a><strong>ipv4_hints</strong> ()</dt>
<dd>
Returns a two-dimensional table of IPv4 address hints.
<h3>Return value:</h3>
Table of table containing known hosts from various sources.
Each entry contains the values in the following order:
[ "ip", "name" ]
</dd>
<dt><a name="net.ipv6_hints"></a><strong>ipv6_hints</strong> ()</dt>
<dd>
Returns a two-dimensional table of IPv6 address hints.
<h3>Return value:</h3>
Table of table containing known hosts from various sources.
Each entry contains the values in the following order:
[ "ip", "name" ]
</dd>
<dt><a name="net.mac_hints"></a><strong>mac_hints</strong> ()</dt>
<dd>
Returns a two-dimensional table of mac address hints.
<h3>Return value:</h3>
Table of table containing known hosts from various sources.
Each entry contains the values in the following order:
[ "mac", "name" ]
</dd>
<dt><a name="net.pingtest"></a><strong>pingtest</strong> (host)</dt>
<dd>
Tests whether the given host responds to ping probes.
<h3>Parameters</h3>
<ul>
<li>
host: String containing a hostname or IPv4 address
</li>
</ul>
<h3>Return value:</h3>
Number containing 0 on success and >= 1 on error
</dd>
<dt><a name="net.routes"></a><strong>routes</strong> ()</dt>
<dd>
Returns the current kernel routing table entries.
<h3>Return value:</h3>
Table of tables with properties of the corresponding routes.
The following fields are defined for route entry tables:
{ "dest", "gateway", "metric", "refcount", "usecount", "irtt",
"flags", "device" }
</dd>
<dt><a name="net.routes6"></a><strong>routes6</strong> ()</dt>
<dd>
Returns the current ipv6 kernel routing table entries.
<h3>Return value:</h3>
Table of tables with properties of the corresponding routes.
The following fields are defined for route entry tables:
{ "source", "dest", "nexthop", "metric", "refcount", "usecount",
"flags", "device" }
</dd>
<dt><a name="reboot"></a><strong>reboot</strong> ()</dt>
<dd>
Initiate a system reboot.
<h3>Return value:</h3>
Return value of os.execute()
</dd>
<dt><a name="syslog"></a><strong>syslog</strong> ()</dt>
<dd>
Retrieves the output of the "logread" command.
<h3>Return value:</h3>
String containing the current log buffer
</dd>
<dt><a name="uniqueid"></a><strong>uniqueid</strong> (bytes)</dt>
<dd>
Generates a random id with specified length.
<h3>Parameters</h3>
<ul>
<li>
bytes: Number of bytes for the unique id
</li>
</ul>
<h3>Return value:</h3>
String containing hex encoded id
</dd>
<dt><a name="uptime"></a><strong>uptime</strong> ()</dt>
<dd>
Returns the current system uptime stats.
<h3>Return value:</h3>
String containing total uptime in seconds
</dd>
</dl>
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