ctdlphp/ctdlsession.php

   1 <?PHP
   2
   3 // $Id$
   4 //
   5 // This gets called from within the header functions.  It establishes or
   6 // connects to a PHP session, and then connects to Citadel if necessary.
   7 //
   8
   9 function establish_citadel_session() {
  10
  11         global $session, $clientsocket;
  12
  13         session_start();
  14
  15         if ($_SESSION["ctdlsession"]) {
  16                 $session = $_SESSION["ctdlsession"];
  17         }
  18         else {
  19                 $session = "CtdlSession." . time() . rand(1000,9999) ;
  20                 $_SESSION["ctdlsession"] = $session;
  21         }
  22
  23         // See if there's a Citadel connection proxy open for this session.
  24         // The name of the socket is identical to the name of the
  25         // session, and it's found in the /tmp directory.
  26
  27         $sockname = "/tmp/" . $session . ".socket" ;
  28
  29         $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
  30         if (!$clientsocket) {
  31                 // It ain't there, dude.  Open up the proxy. (C version)
  32                 //$cmd = "./sessionproxy " . $sockname ;
  33                 //exec($cmd);
  34
  35                 // It ain't there, dude.  Open up the proxy.  (PHP version)
  36                 $cmd = "./sessionproxy.php " . $sockname .
  37                         " </dev/null >/dev/null 2>&1 " .
  38                         " 3>&1 4>&1 5>&1 6>&1 7>&1 8>&1 & " ;
  39                 exec($cmd);
  40                 sleep(2);
  41
  42                 // Ok, now try again.
  43                 $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
  44
  45                 // Try to log the user back in and go back to the correct room.
  46                 if ($clientsocket) {
  47
  48                         ctdl_iden();    // Identify client
  49
  50                         if ($_SESSION["username"]) {
  51                                 login_existing_user(
  52                                         $_SESSION["username"],
  53                                         $_SESSION["password"]
  54                                 );
  55                         }
  56
  57                         if ($_SESSION["room"]) {
  58                                 ctdl_goto($_SESSION["room"]);
  59                         }
  60                         else {
  61                                 ctdl_goto("_BASEROOM_");
  62                         }
  63                 }
  64         }
  65
  66         if ($clientsocket) {
  67                 if (!$_SESSION["serv_humannode"]) {
  68                         ctdl_get_serv_info();
  69                 }
  70         }
  71         else {
  72                 echo "ERROR: no Citadel socket!<BR>\n";
  73                 flush();
  74         }
  75
  76 }
  77
  78
  79 //
  80 // Clear out both our Citadel session and our PHP session.  We're done.
  81 //
  82 function ctdl_end_session() {
  83         global $clientsocket, $session;
  84
  85         // Tell the Citadel server to terminate our connection.
  86         // (The extra newlines force it to see that the Citadel session
  87         // ended, and the proxy will quit.)
  88         //
  89         fwrite($clientsocket, "QUIT\n\n\n\n\n\n\n\n\n\n\n");
  90         $response = fgets($clientsocket, 4096);         // IGnore response
  91         fclose($clientsocket);
  92         unset($clientsocket);
  93
  94         // Now clear our PHP session.
  95         $_SESSION = array();
  96         session_write_close();
  97 }
  98
  99 ?>