Openbuildings\Spiderling\Network

Complexity

Total Complexity

4

Size/Duplication

Total Lines	37
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	1

Test Coverage

Coverage

100%

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	is_port_open()	0	10	2
A	ephimeral_port()	0	7	2

<?php

namespace Openbuildings\Spiderling;

/**
 * Network helper for deailng with ports
 *
 * @package    Openbuildings\Spiderling
 * @author     Ivan Kerin
 * @copyright  (c) 2013 OpenBuildings Ltd.
 * @license    http://spdx.org/licenses/BSD-3-Clause
 */
class Network {

	/**
	 * Check if a port is open
	 * @param  string  $host
	 * @param  integer  $port
	 * @return boolean
	 */
	public static function is_port_open($host, $port)
	{
		$connection = @fsockopen($host, $port);
		if (is_resource($connection))
		{
			fclose($connection);
			return FALSE;
		}
		return TRUE;
	}

	/**
	 * Find an open port in a given range, trying several times.
	 * Return FALSE if no open port is found after a timeout (1 second by default)
	 *
	 * @param  string  $host
	 * @param  integer $range_start
	 * @param  integer $range_end
	 * @param  integer $timeout
	 * @return integer|boolean
	 */
	public static function ephimeral_port($host, $range_start = 1000, $range_end = 5000, $timeout = 1000)
	{
		return Attempt::make(function() use ($host, $range_start, $range_end) {
			$port = rand($range_start, $range_end);
			return Network::is_port_open($host, $port) ? $port : FALSE;
		}, $timeout);
	}
}