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dhcp: use static mapping to find a gateway to delegated prefix

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PR: https://forum.opnsense.org/index.php?topic=34416.0
This commit is contained in:
Franco Fichtner 2023-06-12 13:14:05 +02:00
parent 188df11552
commit a738136847
1 changed files with 50 additions and 1 deletions
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51
src/opnsense/scripts/dhcp/prefixes.php
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@ -27,9 +27,37 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
require_once 'config.inc';
require_once 'util.inc';
require_once 'plugins.inc';
$leases_file = "/var/dhcpd/var/db/dhcpd6.leases";
function parse_duid($duid_string)
{
$parsed_duid = [];
for ($i = 0; $i < strlen($duid_string); $i++) {
$s = substr($duid_string, $i, 1);
if ($s == '\\') {
$n = substr($duid_string, $i + 1, 1);
if ($n == '\\' || $n == '"') {
$parsed_duid[] = sprintf('%02x', ord($n));
$i += 1;
} elseif (is_numeric($n)) {
$parsed_duid[] = sprintf('%02x', octdec(substr($duid_string, $i + 1, 3)));
$i += 3;
}
} else {
$parsed_duid[] = sprintf('%02x', ord($s));
}
}
$iaid = array_slice($parsed_duid, 0, 4);
$duid = array_slice($parsed_duid, 4);
return [$iaid, $duid];
}
$leases_file = '/var/dhcpd/var/db/dhcpd6.leases';
if (!file_exists($leases_file)) {
exit(1);
}
@ -54,6 +82,9 @@ foreach (new SplFileObject($leases_file) as $line) {
/* closing bracket */
if (preg_match("/^}/i ", $line)) {
$iaid_duid = parse_duid($duid);
$duid = implode(':', $iaid_duid[1]);
switch ($type) {
case "ia-na":
if (!empty($ia_na)) {
@ -74,6 +105,24 @@ foreach (new SplFileObject($leases_file) as $line) {
}
}
/* since a route requires a gateway try to derive it from static mapping as well */
foreach (plugins_run('static_mapping') as $map) {
foreach ($map as $host) {
if (empty($host['duid'])) {
continue;
}
if (empty($duid_arr[$host['duid']])) {
continue;
}
if (!empty($host['ipaddrv6'])) {
/* we want static mapping to have a higher priority */
$duid_arr[$host['duid']]['ia-na'] = $host['ipaddrv6'];
}
}
}
$routes = [];
foreach ($duid_arr as $entry) {