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<?php defined('SYSPATH') or die('No direct script access.');
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/*
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* This file is part of open source system FreenetIS
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* and it is released under GPLv3 licence.
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*
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* More info about licence can be found:
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* http://www.gnu.org/licenses/gpl-3.0.html
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*
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* More info about project can be found:
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* http://www.freenetis.org/
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*
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*/
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/**
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* Linux SNMP driver.
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* This class MUST not be initialized directly, use Snmp_Factory!
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*
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* @author Ondrej Fibich
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* @see Abstract_Snmp
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*/
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class Linux_Snmp extends Abstract_Snmp
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{
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/**
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* Checks if the driver is compactible with the driver.
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*
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* @param string $device_ip Device IP address
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* @return bool Is compactible?
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*/
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public function isCompactibleDriverWith($device_ip)
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{
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if (!valid::ip($device_ip))
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{
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throw new InvalidArgumentException('Wrong IP address of the device');
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}
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try
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{
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$this->startErrorHandler();
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$row = snmp2_get(
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$device_ip, $this->comunity, 'iso.3.6.1.2.1.1.1.0',
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$this->timeout, $this->retries
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);
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$this->stopErrorHandler();
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}
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catch (Exception $e)
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{
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return FALSE;
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}
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// parse result
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$matches = array();
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if (preg_match('/STRING: "?(.*)"?/', $row, $matches) > 0)
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{
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return text::starts_with($matches[1], 'Linux') ||
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text::starts_with($matches[1], 'S6720'); // Huawei switch
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}
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else
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{
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return FALSE;
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}
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}
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/**
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* Obtain MAC address of a device with the given IP address from ARP table.
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*
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* @param string $device_ip IP address of the device (we would like to know his MAC)
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* @return string MAC address in format xx:xx:xx:xx:xx:xx
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* @throws Exception On SNMP error or wrong SNMP response
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* @throws InvalidArgumentException On wrong IP address
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*/
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public function getARPMacAddressOf($device_ip)
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{
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if (!valid::ip($device_ip))
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{
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throw new InvalidArgumentException('Wrong IP address of the device');
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}
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// obtain
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$this->startErrorHandler();
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$arp_table = snmp2_real_walk(
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$this->deviceIp, $this->comunity, 'iso.3.6.1.2.1.3.1.1.2',
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$this->timeout, $this->retries
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);
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$this->stopErrorHandler();
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// parse result
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$regex = '/Hex-STRING: (([0-9a-fA-F]{2}\s){5}[0-9a-fA-F]{2})/';
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$matches = array();
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foreach ($arp_table as $key => $val)
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{
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if (text::ends_with($key, '.' . $device_ip) &&
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preg_match($regex, $val, $matches))
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{
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return mb_strtolower(str_replace(' ', ':', $matches[1]));
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}
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}
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throw new Exception('Given IP address ' . $device_ip
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. ' not in ARP table on ' . $this->deviceIp);
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}
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/**
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* Obtain MAC address of a device with the given IP address from DHCP server.
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*
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* @param string $device_ip IP address of the device (we would like to know his MAC)
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* @return string MAC address in format xx:xx:xx:xx:xx:xx
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* @throws Exception On SNMP error or wrong SNMP response
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* @throws InvalidArgumentException On wrong IP address
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*/
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public function getDHCPMacAddressOf($device_ip)
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{
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if (!valid::ip($device_ip))
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{
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throw new InvalidArgumentException('Wrong IP address of the device');
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}
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try
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{
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// obtain
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$this->startErrorHandler();
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$row = snmp2_get(
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$this->deviceIp, $this->comunity,
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'iso.3.6.1.2.1.9999.1.1.6.4.1.8.' . $device_ip,
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$this->timeout, $this->retries
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);
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$this->stopErrorHandler();
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}
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catch (Exception $e)
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{
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throw new DHCPMacAddressException($e->getTraceAsString());
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}
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// parse result
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$regex = '/STRING: "(([0-9a-fA-F]{2}\s){5}[0-9a-fA-F]{2})"/';
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$matches = array();
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if (preg_match($regex, $row, $matches) > 0)
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{
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return mb_strtolower(str_replace(' ', ':', $matches[1]));
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}
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else
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{
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throw new DHCPMacAddressException('Invalid SMNP output during obtaning of MAC address: ' . $row);
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}
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}
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/**
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* Obtaint port number with given MAC address.
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*
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* @param string $mac_address MAC address of the device (we would like to know to which port is connected)
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* @return string MAC address in format xx:xx:xx:xx:xx:xx
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* @throws Exception On SNMP error or wrong SNMP response
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* @throws InvalidArgumentException On wrong IP address
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*/
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public function getPortNumberOf($mac_address)
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{
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// is not possible
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return FALSE;
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}
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}
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