librenms/includes/discovery/ipv4-addresses.inc.php

<?php

use LibreNMS\Util\IPv4;
use LibreNMS\Exceptions\InvalidIpException;

if (key_exists('vrf_lite_cisco', $device) && (count($device['vrf_lite_cisco'])!= 0)) {
    $vrfs_lite_cisco = $device['vrf_lite_cisco'];
} else {
    $vrfs_lite_cisco = array(array('context_name'=>null));
}
foreach ($vrfs_lite_cisco as $vrf) {
    $device['context_name']=$vrf['context_name'];

    $oids = trim(snmp_walk($device, 'ipAdEntIfIndex', '-Osq', 'IP-MIB'));
    $oids = str_replace('ipAdEntIfIndex.', '', $oids);
    foreach (explode("\n", $oids) as $data) {
        $data               = trim($data);
        list($oid,$ifIndex) = explode(' ', $data);
        $mask               = trim(snmp_get($device, "ipAdEntNetMask.$oid", '-Oqv', 'IP-MIB'));
        $cidr               = IPv4::netmask2cidr($mask);
        try {
            $ipv4               = new IPv4("$oid/$cidr");
        } catch (InvalidIpException $e) {
            continue;
        }
        $network            = $ipv4->getNetworkAddress() . '/' . $ipv4->cidr;


        if (dbFetchCell('SELECT COUNT(*) FROM `ports` WHERE device_id = ? AND `ifIndex` = ?', array($device['device_id'], $ifIndex)) != '0' && $oid != '0.0.0.0' && $oid != 'ipAdEntIfIndex') {
            $port_id = dbFetchCell('SELECT `port_id` FROM `ports` WHERE `device_id` = ? AND `ifIndex` = ?', array($device['device_id'], $ifIndex));

            if (is_numeric($port_id)) {
                if (dbFetchCell('SELECT COUNT(*) FROM `ipv4_networks` WHERE `ipv4_network` = ?', array($network)) < '1') {
                    dbInsert(array('ipv4_network' => $network, 'context_name' => $device['context_name']), 'ipv4_networks');
                    // echo("Create Subnet $network\n");
                    echo 'S';
                } else {
                    //Update Context
                    dbUpdate(array('context_name' => $device['context_name']), 'ipv4_networks', '`ipv4_network` = ?', array($network));
                    echo 's';
                }

                $ipv4_network_id = dbFetchCell('SELECT `ipv4_network_id` FROM `ipv4_networks` WHERE `ipv4_network` = ?', array($network));

                if (dbFetchCell('SELECT COUNT(*) FROM `ipv4_addresses` WHERE `ipv4_address` = ? AND `ipv4_prefixlen` = ? AND `port_id` = ? ', array($oid, $cidr, $port_id)) == '0') {
                    dbInsert(array(
                        'ipv4_address' => $oid,
                        'ipv4_prefixlen' => $cidr,
                        'ipv4_network_id' => $ipv4_network_id,
                        'port_id' => $port_id,
                        'context_name' => $device['context_name']
                    ), 'ipv4_addresses');
                    // echo("Added $oid/$cidr to $port_id ( $hostname $ifIndex )\n $i_query\n");
                    echo '+';
                } else {
                    //Update Context
                    dbUpdate(array('context_name' => $device['context_name']), 'ipv4_addresses', '`ipv4_address` = ? AND `ipv4_prefixlen` = ? AND `port_id` = ?', array($oid, $cidr, $port_id));
                    echo '.';
                }
                $full_address = "$oid/$cidr|$ifIndex";
                $valid_v4[$full_address] = 1;
            } else {
                d_echo("No port id found for $ifIndex");
            }
        } else {
            echo '!';
        }//end if
    }//end foreach

    $sql = 'SELECT `ipv4_addresses`.*, `ports`.`device_id`, `ports`.`ifIndex` FROM `ipv4_addresses`';
    $sql .= ' LEFT JOIN `ports` ON `ipv4_addresses`.`port_id` = `ports`.`port_id`';
    $sql .= ' WHERE `ports`.device_id = ? OR `ports`.`device_id` IS NULL';
    foreach (dbFetchRows($sql, array($device['device_id'])) as $row) {
        $full_address = $row['ipv4_address'].'/'.$row['ipv4_prefixlen'].'|'.$row['ifIndex'];

        if (!$valid_v4[$full_address]) {
            echo '-';
            $query = dbDelete('ipv4_addresses', '`ipv4_address_id` = ?', array($row['ipv4_address_id']));
            if (!dbFetchCell('SELECT COUNT(*) FROM `ipv4_addresses` WHERE `ipv4_network_id` = ?', array($row['ipv4_network_id']))) {
                $query = dbDelete('ipv4_networks', '`ipv4_network_id` = ?', array($row['ipv4_network_id']));
            }
        }
    }

    echo "\n";
    unset($device['context_name']);
    unset($valid_v4);
}
unset($vrfs_c);