| 18,11 → 18,16 |
|---|
| * limitations under the License. |
| */ |
| |
| // Very good resources for information about OUI, EUI, MAC, ... |
| // - https://mac-address.alldatafeeds.com/faq#how-to-recognise-mac-address-application |
| // - https://standards.ieee.org/wp-content/uploads/import/documents/tutorials/eui.pdf |
| // - https://en.m.wikipedia.org/wiki/Organizationally_unique_identifier |
| |
| const IEEE_MAC_REGISTRY = __DIR__ . '/../web-data'; |
| |
| /** |
| * Checks if a MAC, EUI, or IPv6-LinkLocal address is valid |
| * @param string $mac MAC, EUI, or IPv6-LinkLocal Address |
| * Checks if a MAC, EUI, ELI, or IPv6-Link-Local address is valid |
| * @param string $mac MAC, EUI, or IPv6-Link-Local Address |
| * @return bool True if it is valid |
| */ |
| function mac_valid(string $mac): bool { |
| 40,7 → 45,7 |
|---|
| } |
| |
| /** |
| * Returns the amount of bits of a MAC or EUI |
| * Returns the amount of bits of a MAC, EUI, or ELI |
| * @param string $mac |
| * @return false|int |
| */ |
| 51,10 → 56,10 |
|---|
| } |
| |
| /** |
| * Canonizes a MAC, EUI, or IPv6-LinkLocal address |
| * @param string $mac MAC, EUI, or IPv6-LinkLocal Address |
| * Canonizes a MAC, EUI, ELI, or IPv6-Link-Local address |
| * @param string $mac MAC, EUI, ELI, or IPv6-Link-Local Address |
| * @param string $delimiter Desired delimiter for inserting between each octet |
| * @return string|false The canonized address (Note: IPv6-Linklocal becomes EUI-64) |
| * @return string|false The canonized address (Note: IPv6-Link-Local becomes EUI-64) |
| */ |
| function mac_canonize(string $mac, string $delimiter="-") { |
| if (!mac_valid($mac)) return false; |
| 133,6 → 138,7 |
|---|
| if (!mac_valid($eui64)) return false; |
| $eui64 = mac_canonize($eui64, ''); |
| if (eui_bits($eui64) == 48) return mac_canonize($eui64); |
| if ($eui64[1] == 'A') return false; // do not allow ELI-64 |
| |
| if (substr($eui64, 6, 4) == 'FFFF') { |
| // EUI-64 to MAC-48 |
| 162,6 → 168,7 |
|---|
| if (!mac_valid($mac48)) return false; |
| $mac48 = mac_canonize($mac48, ''); |
| if (eui_bits($mac48) == 64) return mac_canonize($mac48); |
| if ($mac48[1] == 'A') return false; // do not allow ELI-48 |
| |
| $eui64 = substr($mac48, 0, 6).'FFFF'.substr($mac48, 6, 6); |
| return mac_canonize($eui64); |
| 178,6 → 185,7 |
|---|
| if (!mac_valid($eui48)) return false; |
| $eui48 = mac_canonize($eui48, ''); |
| if (eui_bits($eui48) == 64) return mac_canonize($eui48); |
| if ($eui48[1] == 'A') return false; // do not allow ELI-48 |
| |
| $eui64 = substr($eui48, 0, 6).'FFFE'.substr($eui48, 6, 6); |
| return mac_canonize($eui64); |
| 194,6 → 202,7 |
|---|
| if (!mac_valid($eui48)) return false; |
| $eui48 = mac_canonize($eui48, ''); |
| if (eui_bits($eui48) == 64) return mac_canonize($eui48); |
| if ($eui48[1] == 'A') return false; // do not allow ELI-48 |
| |
| $eui64 = substr($eui48, 0, 6).'FFFE'.substr($eui48, 6, 6); |
| |
| 203,8 → 212,8 |
|---|
| } |
| |
| /** |
| * Try to convert IPv6-LinkLocal address to MAC-48 |
| * @param string $ipv6 IPv6-LinkLocal address |
| * Try to convert IPv6-Link-Local address to MAC-48 |
| * @param string $ipv6 IPv6-Link-Local address |
| * @return false|string MAC-48 (or IPv6 if it was no LinkLocal address, or Modified EUI-64 if it decapsulation failed) |
| */ |
| function ipv6linklocal_to_mac48(string $ipv6) { |
| 214,7 → 223,7 |
|---|
| $hex = unpack("H*hex", $tmp); |
| $ipv6 = substr(preg_replace("/([A-f0-9]{4})/", "$1:", $hex['hex']), 0, -1); |
| |
| // Remove "fe80::" to convert IPv6 Link Local address back to EUI-64 |
| // Remove "fe80::" to convert IPv6-Link-Local address back to EUI-64 |
| // see https://support.lenovo.com/de/de/solutions/ht509925-how-to-convert-a-mac-address-into-an-ipv6-link-local-address-eui-64 |
| $cnt = 0; |
| $mac = preg_replace('@^fe80:0000:0000:0000:@i', '', $ipv6, -1, $cnt); |
| 233,7 → 242,7 |
|---|
| } |
| |
| /** |
| * Converts MAC-48 or EUI-48 to IPv6-LinkLocal (based on Modified EUI-64) |
| * Converts MAC-48 or EUI-48 to IPv6-Link-Local (based on Modified EUI-64) |
| * @param string $mac |
| * @return false|string |
| */ |
| 248,14 → 257,12 |
|---|
| } |
| |
| /** |
| * Prints information about an IPv6-LinkLocal address, MAC, or EUI. |
| * @param string $mac IPv6-LinkLocal address, MAC, or EUI |
| * Prints information about an IPv6-Link-Local address, MAC, EUI, or ELI. |
| * @param string $mac IPv6-Link-Local address, MAC, EUI, or ELI |
| * @return void |
| * @throws Exception |
| */ |
| function decode_mac(string $mac) { |
| // Amazing website about MAC addresses: https://mac-address.alldatafeeds.com/faq#how-to-recognise-mac-address-application |
| |
| echo sprintf("%-32s %s\n", "Input:", $mac); |
| |
| // Format MAC for machine readability |
| 262,6 → 269,12 |
|---|
| $mac = mac_canonize($mac, ''); |
| |
| $type = ''; |
| if ($mac[1] == 'A') { |
| // An ELI is based on a CID-24 |
| // A CID has ZYXM bits set to 1010 (0b1010 = 0xA) |
| // Since X=1 (U/L=1), the CID cannot be used to form a universal UAA MAC (only a local LAA MAC) |
| $type = 'ELI-'.eui_bits($mac);; |
| } else { |
| $tmp = ipv6linklocal_to_mac48($mac); |
| if ($tmp !== false) { |
| $mac = $tmp; |
| 287,13 → 300,20 |
|---|
| assert(false); /** @phpstan-ignore-line */ |
| } |
| } |
| } |
| echo sprintf("%-32s %s\n", "Type:", $type); |
| |
| echo "\n"; |
| |
| // Show various representations |
| if ($mac[1] == 'A') { |
| // Note: There does not seem to exist an algorithm for converting ELI-48 <=> ELI-64 |
| echo sprintf("%-32s %s\n", "ELI-".eui_bits($mac).":", mac_canonize($mac)); |
| $mac48 = eui64_to_eui48($mac); |
| echo sprintf("%-32s %s\n", "MAC-48 (Local):", (eui_bits($mac48) != 48) ? 'Not available' : $mac48); |
| } else { |
| $eui48 = eui64_to_eui48($mac); |
| echo sprintf("%-32s %s\n", "EUI-48:", (eui_bits($eui48) != 48) ? 'Not available' : $eui48); |
| echo sprintf("%-32s %s\n", "EUI-48 or MAC-48:", (eui_bits($eui48) != 48) ? 'Not available' : $eui48); |
| if (eui_bits($mac) == 48) { |
| $eui64 = mac48_to_eui64($mac); |
| echo sprintf("%-32s %s\n", "EUI-64:", ((eui_bits($eui64) != 64) ? 'Not available' : $eui64).' (MAC-48 to EUI-64 Encapsulation)'); |
| 302,11 → 322,12 |
|---|
| $eui64 = maceui48_to_modeui64($mac); |
| echo sprintf("%-32s %s\n", "", ((eui_bits($eui64) != 64) ? 'Not available' : $eui64).' (MAC/EUI-48 to Modified EUI-64 Encapsulation)'); |
| $ipv6 = maceui_to_ipv6linklocal($mac); |
| echo sprintf("%-32s %s\n", "IPv6 link local address:", $ipv6); |
| echo sprintf("%-32s %s\n", "IPv6-Link-Local address:", $ipv6); |
| } else { |
| $eui64 = mac_canonize($mac); |
| echo sprintf("%-32s %s\n", "EUI-64:", $eui64); |
| } |
| } |
| |
| // Vergabestelle |
| $ul = hexdec($mac[1]) & 2; // Bit #LSB+1 of Byte 1 |
| 315,13 → 336,22 |
|---|
| |
| // Empfaengergruppe |
| $ig = hexdec($mac[1]) & 1; // Bit #LSB+0 of Byte 1 |
| $ig_ = ($ig == 0) ? '[0] Individual (Unicast)' : '[1] Group (Multicast)'; |
| $ig_ = ($ig == 0) ? '[0] Unicast (Individual)' : '[1] Multicast (Group)'; |
| echo sprintf("%-32s %s\n", "Transmission type (I/G flag):", $ig_); |
| |
| // Query IEEE registries |
| // TODO: gilt OUI nur bei Individual UAA? For LAA, should we convert to UAA and then query the registry? |
| if (count(glob(IEEE_MAC_REGISTRY.DIRECTORY_SEPARATOR.'*.txt')) > 0) { |
| if ($mac[1] == 'A') { |
| // Query the CID registry |
| if ( |
| ($x = _lookup_ieee_registry(IEEE_MAC_REGISTRY . DIRECTORY_SEPARATOR . 'cid.txt', 'CID', $mac)) |
| ) { |
| echo $x; |
| } |
| } else { |
| // Query the OUI registries |
| // TODO: Should we try to convert Unicast<=>Multicast if one of them can't be found? |
| if ( |
| # The IEEE Registration Authority distinguishes between IABs and OUI-36 values. Both are 36-bit values which may be used to generate EUI-48 values, but IABs may not be used to generate EUI-64 values.[6] |
| # Note: The Individual Address Block (IAB) is an inactive registry activity, which has been replaced by the MA-S registry product as of January 1, 2014. |
| ($x = _lookup_ieee_registry(IEEE_MAC_REGISTRY . DIRECTORY_SEPARATOR . 'iab.txt', 'IAB', $mac)) || |
| 332,6 → 362,7 |
|---|
| echo $x; |
| } |
| } |
| } |
| |
| $vm = ''; |
| // === FAQ "Detection rules which don't have their dedicated page yet" === |
| 449,7 → 480,8 |
|---|
| if (mac_equals($mac, 'CF:00:00:00:00:00')) $app = 'Used for Ethernet loopback tests'; |
| |
| // === FAQ "How to recognise a Broadcast MAC address application?" === |
| if (mac_equals($mac, 'FF:FF:FF:FF:FF:FF')) echo sprintf("%-32s %s\n", "Special use:", "Broadcast messaging"); |
| // According to https://standards.ieee.org/wp-content/uploads/import/documents/tutorials/eui.pdf FFFFFFFFFFFF can be used as NULL EUI |
| if (mac_equals($mac, 'FF:FF:FF:FF:FF:FF')) echo sprintf("%-32s %s\n", "Special use:", "Broadcast messaging or Null-EUI"); |
| |
| // === FAQ "How to recognise a Virtual Router ID by MAC address?" === |
| // https://tools.ietf.org/html/rfc7042#section-5.1 |
| 771,8 → 803,11 |
|---|
| |
| if ((eui_bits($mactest) != eui_bits($lowtest)) || (eui_bits($lowtest) != eui_bits($hightest))) { |
| $mactest = eui48_to_eui64($mac); |
| if ($mactest === false) return false; // e.g. trying ELI-48 to ELI-64 |
| $lowtest = eui48_to_eui64($low); |
| if ($lowtest === false) return false; // e.g. trying ELI-48 to ELI-64 |
| $hightest = eui48_to_eui64($high); |
| if ($hightest === false) return false; // e.g. trying ELI-48 to ELI-64 |
| } |
| |
| $mactest = strtoupper(preg_replace('@[^0-9A-F]@', '', $mactest)); |