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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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snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
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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 $e)
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{
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return FALSE;
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}
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if (text::starts_with($row, 'Linux') ||
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text::starts_with($row, 'S6720'))
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{
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return TRUE;
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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($device_ip))
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{
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throw new InvalidArgumentException('Wrong IP address of the device');
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}
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$arp_table = $this->getARPTable();
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if (array_key_exists($device_ip, $arp_table))
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{
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return $arp_table[$device_ip]->mac_address;
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}
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else
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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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/**
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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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snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
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$mac_address = snmp2_get(
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$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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return mb_strtolower(str_replace(' ', ':', $mac_address));
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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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* Obtain names of all network interfaces of device
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*
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* @return array Network interfaces of device
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* @throws Exception On SNMP error or wrong SNMP response
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*/
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public function getIfaces()
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{
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// obtain all interfaces
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$this->startErrorHandler();
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snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
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$data = snmp2_real_walk(
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$this->deviceIp, $this->comunity,
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'iso.3.6.1.2.1.31.1.1.1.1',
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$this->timeout, $this->retries
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);
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$this->stopErrorHandler();
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$ifaces = array();
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foreach ($data as $key => $value)
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{
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$oids = explode('.', $key);
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$iface_id = array_pop($oids);
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$ifaces[$iface_id] = $value;
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}
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return $ifaces;
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}
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/**
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* Obtain current state of device's ports
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*
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* @return array Current states of all ports
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* @throws Exception On SNMP error or wrong SNMP response
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*/
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public function getPortStates()
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{
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return array();
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}
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/**
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* Obtain ARP table of device
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*
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* @return array Whole ARP table from device
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* @throws Exception On SNMP error or wrong SNMP response
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*/
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public function getARPTable()
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{
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// obtain whole ARP table
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$this->startErrorHandler();
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snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
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$arp_table = snmp2_real_walk(
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$this->deviceIp, $this->comunity,
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'iso.3.6.1.2.1.4.22.1.2',
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$this->timeout, $this->retries
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);
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$this->stopErrorHandler();
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$ifaces = self::getIfaces();
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$items = array();
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foreach ($arp_table as $key => $value)
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{
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$pieces = explode('.', $key);
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$iface_id = implode('.', array_slice($pieces, -5, 1));
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if (!array_key_exists($iface_id, $ifaces))
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continue;
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$mac = network::bin2mac($value);
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$item = new stdClass();
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$item->ip_address = implode('.', array_slice($pieces, -4));
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$item->mac_address = $mac;
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$item->iface_name = $ifaces[$iface_id];
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$items[$item->ip_address] = $item;
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}
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return $items;
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}
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/**
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* Obtain DHCP leases of device
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*
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* @return array All DHCP leases
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* @throws Exception On SNMP error or wrong SNMP response
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*/
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public function getDHCPLeases()
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{
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// obtain all DHCP leases
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$this->startErrorHandler();
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snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
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$dhcp_leases = snmp2_real_walk(
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$this->deviceIp, $this->comunity,
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'iso.3.6.1.2.1.9999.1.1.6.4.1.8',
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$this->timeout, $this->retries
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);
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$this->stopErrorHandler();
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$items = array();
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foreach ($dhcp_leases as $key => $value)
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{
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$pieces = explode('.', $key);
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$item = new stdClass();
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$item->ip_address = implode('.', array_slice($pieces, -4));
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$item->mac_address = str_replace(' ', ':', $value);
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$items[] = $item;
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}
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return $items;
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}
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/**
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* Obtain device's hostname from DHCP leases of device
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*
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* @param string $device_ip IP address to which we will search for hostname
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* @return string Hostname for given IP address
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* @throws Exception On SNMP error or wrong SNMP response
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* @throws InvalidArgumentException On wrong IP address
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*/
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public function getDHCPHostnameOf($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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snmp_set_valueretrieval(SNMP_VALUE_PLAIN);
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$hostname = snmp2_get(
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$this->deviceIp, $this->comunity,
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'iso.3.6.1.2.1.9999.1.1.6.4.1.9.' . $device_ip,
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$this->timeout, $this->retries
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);
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$this->stopErrorHandler();
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}
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catch (Exception $e)
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{
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throw new Exception($e->getTraceAsString());
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}
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return $hostname;
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}
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/**
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* Obtain wireless info of device
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*
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* @return array Current wireless info
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* @throws Exception On SNMP error or wrong SNMP response
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*/
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public function getWirelessInfo()
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{
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return array();
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}
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/**
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* Obtain MAC table from device
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*
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* @return array Whole MAC table
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* @throws Exception On SNMP error or wrong SNMP response
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*/
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public function getMacTable()
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{
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return array();
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}
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}
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