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, $clientsocket;
  12
  13         if (strcmp('4.3.0', phpversion()) > 0) {
  14                 die("This program requires PHP 4.3.0 or newer.");
  15         }
  16
  17
  18         session_start();
  19
  20         if ($_SESSION["ctdlsession"]) {
  21                 $session = $_SESSION["ctdlsession"];
  22         }
  23         else {
  24                 $session = "CtdlSession." . time() . rand(1000,9999) ;
  25                 $_SESSION["ctdlsession"] = $session;
  26         }
  27
  28         // See if there's a Citadel connection proxy open for this session.
  29         // The name of the socket is identical to the name of the
  30         // session, and it's found in the /tmp directory.
  31
  32         $sockname = "/tmp/" . $session . ".socket" ;
  33
  34         $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
  35         if (!$clientsocket) {
  36                 // It ain't there, dude.  Open up the proxy. (C version)
  37                 //$cmd = "./sessionproxy " . $sockname ;
  38                 //exec($cmd);
  39
  40                 // It ain't there, dude.  Open up the proxy.  (PHP version)
  41                 $cmd = "./sessionproxy.php " . $sockname .
  42                         " </dev/null >/dev/null 2>&1 " .
  43                         " 3>&1 4>&1 5>&1 6>&1 7>&1 8>&1 & " ;
  44                 exec($cmd);
  45                 sleep(2);
  46
  47                 // Ok, now try again.
  48                 $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
  49
  50                 // Try to log the user back in and go back to the correct room.
  51                 if ($clientsocket) {
  52
  53                         ctdl_iden();    // Identify client
  54
  55                         if ($_SESSION["username"]) {
  56                                 login_existing_user(
  57                                         $_SESSION["username"],
  58                                         $_SESSION["password"]
  59                                 );
  60                         }
  61
  62                         if ($_SESSION["room"]) {
  63                                 ctdl_goto($_SESSION["room"]);
  64                         }
  65                         else {
  66                                 ctdl_goto("_BASEROOM_");
  67                         }
  68                 }
  69         }
  70
  71         if ($clientsocket) {
  72                 if (!$_SESSION["serv_humannode"]) {
  73                         ctdl_get_serv_info();
  74                 }
  75         }
  76         else {
  77                 echo "ERROR: no Citadel socket!<BR>\n";
  78                 flush();
  79         }
  80
  81         // If the user is trying to call up any page other than
  82         // login.php logout.php do_login.php,
  83         // and the session is not logged in, redirect to login.php
  84         //
  85         if ($_SESSION["logged_in"] != 1) {
  86                 $filename = basename(getenv('SCRIPT_NAME'));
  87                 if (    (strcmp($filename, "login.php"))
  88                    &&   (strcmp($filename, "logout.php"))
  89                    &&   (strcmp($filename, "do_login.php"))
  90                 ) {
  91                         header("Location: login.php");
  92                         exit(0);
  93                 }
  94         }
  95
  96
  97 }
  98
  99
 100 //
 101 // Clear out both our Citadel session and our PHP session.  We're done.
 102 //
 103 function ctdl_end_session() {
 104         global $clientsocket, $session;
 105
 106         // Tell the Citadel server to terminate our connection.
 107         // (The extra newlines force it to see that the Citadel session
 108         // ended, and the proxy will quit.)
 109         //
 110         fwrite($clientsocket, "QUIT\n\n\n\n\n\n\n\n\n\n\n");
 111         $response = fgets($clientsocket, 4096);         // IGnore response
 112         fclose($clientsocket);
 113         unset($clientsocket);
 114
 115         // Now clear our PHP session.
 116         $_SESSION = array();
 117         session_write_close();
 118 }
 119
 120 ?>