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1
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<?php
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2
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3
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$leases_file = "/var/dhcpd/var/db/dhcpd6.leases";
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4
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if(!file_exists($leases_file)) {
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5
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exit(1);
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6
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}
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7
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8
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$duid_arr = array();
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9
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foreach(file($leases_file) as $line) {
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10
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// echo "$line";
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11
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if(preg_match("/^(ia-[np][ad])[ ]+\"(.*?)\"/i ", $line, $duidmatch)) {
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12
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$type = $duidmatch[1];
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13
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$duid = $duidmatch[2];
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14
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continue;
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15
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}
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16
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17
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/* is it active? otherwise just discard */
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18
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if(preg_match("/binding state active/i", $line, $activematch)) {
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19
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$active = true;
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20
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continue;
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21
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}
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22
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23
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if(preg_match("/iaaddr[ ]+([0-9a-f:]+)[ ]+/i", $line, $addressmatch)) {
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24
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$ia_na = $addressmatch[1];
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25
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continue;
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26
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}
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27
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28
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if(preg_match("/iaprefix[ ]+([0-9a-f:\/]+)[ ]+/i", $line, $prefixmatch)) {
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29
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$ia_pd = $prefixmatch[1];
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30
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continue;
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31
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}
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32
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33
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/* closing bracket */
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34
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if(preg_match("/^}/i ", $line)) {
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35
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switch($type) {
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36
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case "ia-na":
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37
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$duid_arr[$duid][$type] = $ia_na;
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38
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break;
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39
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case "ia-pd":
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40
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$duid_arr[$duid][$type] = $ia_pd;
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41
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break;
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42
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}
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43
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unset($type);
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44
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unset($duid);
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45
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unset($active);
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46
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unset($ia_na);
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47
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unset($ia_pd);
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48
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continue;
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49
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}
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50
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}
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51
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52
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$routes = array();
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53
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foreach ($duid_arr as $entry) {
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54
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if($entry['ia-pd'] <> "") {
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55
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$routes[$entry['ia-na']] = $entry['ia-pd'];
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56
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}
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57
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array_shift($duid_arr);
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58
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}
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59
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60
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// echo "add routes\n";
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61
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if(count($routes) > 0) {
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62
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foreach ($routes as $address => $prefix) {
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63
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echo "/sbin/route change -inet6 {$prefix} {$address}\n";
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64
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}
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65
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}
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66
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67
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/* get clog from dhcpd */
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68
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$dhcpdlogfile = "/var/log/dhcpd.log";
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69
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$clog = array();
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70
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if(file_exists(dhcpdlogfile))
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71
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exec("clog $dhcpdlogfile", $clog, $ret);
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72
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73
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if($ret > 0)
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74
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$clog = array();
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75
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76
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$expires = array();
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77
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foreach($clog as $line) {
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78
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if(preg_match("/releases[ ]+prefix[ ]+([0-9a-f:]+\/[0-9]+)/i", $line, $expire)) {
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79
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if(in_array($expire[1], $routes))
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80
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continue;
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81
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$expires[$expire[1]] = $expire[1];
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82
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}
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83
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array_shift($clog);
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84
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}
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85
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86
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// echo "remove routes\n";
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87
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if(count($expires) > 0) {
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88
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foreach ($expires as $prefix) {
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89
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echo "/sbin/route delete -inet6 {$prefix['prefix']}\n";
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90
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array_shift($expires);
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91
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}
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92
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}
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93
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94
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?>
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