<?php

error_reporting(0);  // skippa felmeddelanden

// Ange IP-range av switchar
$switch_ips = array(
    '172.30.0.20',
    '172.30.0.21',
    '172.30.0.22',
    '172.30.0.23',
    '172.30.0.24',
    '172.30.0.25',
    '172.30.0.26',
    '172.30.0.27',
    '172.30.0.28',
    '172.30.0.28' 
);
$community = 'public'; // SNMP "lösenord"

foreach ($switch_ips as $switch_ip) {
    echo "Bearbetar switch: $switch_ip\n";

    // Hämta mappningen av bridge-portar till interface-index: dot1dBasePortIfIndex
    $dot1dBasePortIfIndex_oids = @snmp2_real_walk($switch_ip, $community, '1.3.6.1.2.1.17.1.4.1.2',-1,-1);
    if ($dot1dBasePortIfIndex_oids === false) {
        echo "Kunde inte hämta data från switchen $switch_ip\n\n";
        continue;
    }

    $bridgePortToIfIndex = array();
    foreach ($dot1dBasePortIfIndex_oids as $oid => $value) {
        // Extrahera bridge-portnummer från OID
        $parts = explode('.', $oid);
        $bridgePort = array_pop($parts);
        // Rensa värdet
        $ifIndex = trim(str_replace('INTEGER:', '', $value));
        $bridgePortToIfIndex[$bridgePort] = $ifIndex;
    }

    // Hämta interface-namn: ifDescr
    $ifDescr_oids = snmp2_real_walk($switch_ip, $community, '1.3.6.1.2.1.2.2.1.2',-1,-1);

    $ifIndexToName = array();
    foreach ($ifDescr_oids as $oid => $value) {
        // Extrahera ifIndex från OID
        $parts = explode('.', $oid);
        $ifIndex = array_pop($parts);
        // Rensa värdet
        $ifName = trim(str_replace('STRING:', '', $value), '" ');
        $ifIndexToName[$ifIndex] = $ifName;
    }

    // Hämta MAC-adresser: dot1dTpFdbAddress
    $dot1dTpFdbAddress_oids = snmp2_real_walk($switch_ip, $community, '1.3.6.1.2.1.17.4.3.1.1',-1,-1);

    $macAddresses = array();
    foreach ($dot1dTpFdbAddress_oids as $oid => $value) {
        // Extrahera index från OID
        $parts = explode('.', $oid);
        $indexParts = array_slice($parts, 11); // OID-prefixet är 11 delar
        $index = implode('.', $indexParts);
        // Rensa och formatera MAC-adressen
        $macRaw = trim(str_replace('Hex-STRING: ', '', $value));
        $macAddress = strtolower(str_replace(' ', ':', $macRaw));
        $macAddresses[$index] = $macAddress;
    }

    // Hämta bridge-portar för varje MAC-adress: dot1dTpFdbPort
    $dot1dTpFdbPort_oids = snmp2_real_walk($switch_ip, $community, '1.3.6.1.2.1.17.4.3.1.2',-1,-1);

    $bridgePorts = array();
    foreach ($dot1dTpFdbPort_oids as $oid => $value) {
        // Extrahera index från OID
        $parts = explode('.', $oid);
        $indexParts = array_slice($parts, 11); // OID-prefixet är 11 delar
        $index = implode('.', $indexParts);
        $bridgePort = trim(str_replace('INTEGER:', '', $value));
        $bridgePorts[$index] = $bridgePort;
    }

    // Mappa MAC-adresser till interface
    $macToInterface = array();

	foreach ($macAddresses as $index => $macAddress) {
        if (isset($bridgePorts[$index])) {
            $bridgePort = $bridgePorts[$index];
            if ($bridgePort == '0') {
                // Bridge-port ID 0 indikerar switchens interna MAC-adress
                $macToInterface[$macAddress] = 'Switchens interna mac-adress';
            } elseif (isset($bridgePortToIfIndex[$bridgePort])) {
                $ifIndex = $bridgePortToIfIndex[$bridgePort];
                if (isset($ifIndexToName[$ifIndex])) {
                    $interfaceName = $ifIndexToName[$ifIndex];
                    $macToInterface[$macAddress] = $interfaceName;
                } else {
                    $macToInterface[$macAddress] = 'Okänt interface';
                }
            } else {
                $macToInterface[$macAddress] = 'Okänd switch-port';
            }
        } else {
            $macToInterface[$macAddress] = 'Okänd switch-port';
        }
    }
    // Skriv ut listan för varje switch
    foreach ($macToInterface as $macAddress => $interfaceName) {
        echo "MAC-adress: $macAddress - Switch Port: $interfaceName\n";
    }
    echo "\n";
}
?>