quick and dirty dyndns service

This script updates powerdns entries. It does not permission checks yet and is best described as a proof of concept .

1 files changed, 93 insertions, 0 deletions

diff --git a/update.php b/update.php
new file mode 100644
index 0000000..a033d38
--- /dev/null
+++ b/update.php
@@ -0,0 +1,93 @@
+<?php
+// http://info.wireme.de/update.php?ip=<ipaddr>&ipv6=<ip6addr>&domain=<domain>&user=<username>&pass=<pass>
+
+function print_error()
+{
+  echo 'pg error';
+}
+
+// Connecting, selecting database
+echo "content-type: text/html\n\n";
+# $conn   = pg_connect('host=/var/run/postgresql user=username dbname=databasename');
+$dbconn = pg_connect('host=10.0.0.101          user=powerdns dbname=powerdns connect_timeout=5')
+  or die('Could not connect: ' . pg_last_error());
+
+// if(!$dbconn)
+// {
+//   echo "fehler\n";
+//   die('Could not connect: ' . pg_last_error());
+// }
+echo "gut\n";
+
+// Performing SQL query
+
+$ip = "127.0.0.1";
+if(isset($_GET['ip']))
+{ $ip     = $_GET['ip']; }
+
+$ipv6 = "::0";
+if(isset($_GET['ipv6']))
+{ $ipv6     = $_GET['ipv6']; }
+
+
+if(! preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/', $ip) )
+{ die("illegal ip"); }
+
+
+$user = '';
+if(isset($_GET['user']))
+{ $user = $_GET['user']; }
+
+if(! preg_match('/[a-z]+/', $user) )
+{ die("illegal user"); }
+
+
+
+$stmt   = pg_prepare($dbconn, "updatesoa", "update records set content='ns1.first-ns.de postmaster.robot.first-ns.de ".date("U")." 600 300 1800 300' where id=6;")
+  or die('Could not connect: ' . pg_last_error());
+$result = pg_execute($dbconn, "updatesoa", array());
+
+if(pg_affected_rows($result) != 1)
+{
+  die("unable to update soa, result: ".pg_affected_rows($result));
+}
+
+
+#$query  = "UPDATE records SET content='$ip' WHERE type='A' AND name='wire-me.de'; ";
+#echo 'gut';
+# $result = pg_query($query) or die('Query failed: ' . pg_last_error());
+$stmt   = pg_prepare($dbconn, "updatedns", "UPDATE records SET content=$1 WHERE type=$2 AND name=$3;")
+  or die('Could not connect: ' . pg_last_error());
+$result = pg_execute($dbconn, "updatedns", array($ip, "A", $user.".wire-me.de"));
+$result = pg_execute($dbconn, "updatedns", array($ipv6, "AAAA", $user.".wire-me.de"));
+
+if(pg_affected_rows($result) != 1)
+{
+  $fh = fopen("error.log", "a+");
+  fwrite($fh, "IP: $ip; user: $user;\n");
+  fclose($fh);
+  die("unable to update user");
+}
+
+
+
+echo '<br/>rows: "'.pg_affected_rows($result).'"';
+echo '<br/>result: "'.$result.'"';
+echo '<br/>error: "'.pg_result_error($result).'"';
+// Printing results in HTML
+// echo "<table>\n";
+// while ($line = pg_fetch_array($result, null, PGSQL_ASSOC)) {
+//     echo "\t<tr>\n";
+//     foreach ($line as $col_value) {
+//         echo "\t\t<td>$col_value</td>\n";
+//     }
+//     echo "\t</tr>\n";
+// }
+// echo "</table>\n";
+
+// Free resultset
+pg_free_result($result);
+
+// Closing connection
+pg_close($dbconn);
+?>