ctdlphp/ctdlsession.php

   1 <?PHP
   2 // $Id$
   3 //
   4 // This gets called from within the header functions.  It establishes or
   5 // connects to a PHP session, and then connects to Citadel if necessary.
   6 //
   7 // Web designers: please make changes in ctdlheader.php, not here.
   8 //
   9 // Copyright (c) 2003 by Art Cancro <ajc@uncensored.citadel.org>
  10 // This program is released under the terms of the GNU General Public License.
  11
  12
  13 function establish_citadel_session() {
  14
  15         global $session, $clientsocket;
  16
  17         if (strcmp('4.3.0', phpversion()) > 0) {
  18                 die("This program requires PHP 4.3.0 or newer.");
  19         }
  20
  21
  22         session_start();
  23
  24         if (isset($_SESSION["ctdlsession"])) {
  25                 $session = $_SESSION["ctdlsession"];
  26         }
  27         else {
  28                 $session = "CtdlSession." . time() . rand(1000,9999) ;
  29                 $_SESSION["ctdlsession"] = $session;
  30         }
  31
  32         // See if there's a Citadel connection proxy open for this session.
  33         // The name of the socket is identical to the name of the
  34         // session, and it's found in the /tmp directory.
  35
  36         $sockname = "/tmp/" . $session . ".socket" ;
  37
  38         $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
  39         if (!$clientsocket) {
  40                 // It ain't there, dude.  Open up the proxy. (C version)
  41                 //$cmd = "./sessionproxy " . $sockname ;
  42                 //exec($cmd);
  43
  44                 // It ain't there, dude.  Open up the proxy.  (PHP version)
  45                 $cmd = "./sessionproxy.php " . $sockname .
  46                         " </dev/null >/dev/null 2>&1 " .
  47                         " 3>&1 4>&1 5>&1 6>&1 7>&1 8>&1 & " ;
  48                 exec($cmd);
  49
  50                 // Keep attempting connections 10 times per second up to 100 times
  51                 $attempts = 0;
  52                 while (!$clientsocket) {
  53                         usleep(100);
  54                         $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
  55                         $attempts += 1;
  56                         if ($attempts > 100) {
  57                                 echo "ERROR: unable to start connection proxy. ";
  58                                 echo "Please contact your system administrator.<BR>\n";
  59                                 flush();
  60                                 exit(1);
  61                         }
  62                 }
  63
  64                 // At this point we have a good connection to Citadel.
  65                 $identity=array(
  66                         "DevelNr" => '0',
  67                         "ClientID" => '8',
  68                         "VersionNumber" => '001',
  69                         "ClientInfoString" => 'PHP web client|',
  70                         "Remote Address" => $_SERVER['REMOTE_ADDR'] );
  71
  72                 ctdl_iden($identity);   // Identify client
  73                 ctdl_MessageFormatsPrefered(array("text/html","text/plain"));
  74                 if (isset($_SESSION["username"])) {
  75                         login_existing_user(
  76                                 $_SESSION["username"],
  77                                 $_SESSION["password"]
  78                         );
  79                 }
  80
  81                 if (isset($_SESSION["room"])) {
  82                         ctdl_goto($_SESSION["room"]);
  83                 }
  84                 else {
  85                         ctdl_goto("_BASEROOM_");
  86                 }
  87         }
  88
  89         if (!isset($_SESSION["serv_humannode"])) {
  90                 $server_info = ctdl_get_serv_info();
  91                 print_r($server_info);
  92                 $keys = array_keys($server_info);
  93                 foreach ($keys as $key)
  94                         $_SESSION[$key] = $server_info[$key];
  95         }
  96
  97         // If the user is trying to call up any page other than
  98         // login.php logout.php do_login.php,
  99         // and the session is not logged in, redirect to login.php
 100         //
 101         if (isset($_SESSION["logged_in"]) && ($_SESSION["logged_in"] != 1)) {
 102                 $filename = basename(getenv('SCRIPT_NAME'));
 103                 if (    (strcmp($filename, "login.php"))
 104                    &&   (strcmp($filename, "logout.php"))
 105                    &&   (strcmp($filename, "do_login.php"))
 106                 ) {
 107                         header("Location: login.php");
 108                         exit(0);
 109                 }
 110         }
 111
 112
 113 }
 114
 115
 116 //
 117 // Clear out both our Citadel session and our PHP session.  We're done.
 118 //
 119 function ctdl_end_session() {
 120         global $clientsocket, $session;
 121
 122         // Tell the Citadel server to terminate our connection.
 123         // (The extra newlines force it to see that the Citadel session
 124         // ended, and the proxy will quit.)
 125         //
 126         fwrite($clientsocket, "QUIT\n\n\n\n\n\n\n\n\n\n\n");
 127         $response = fgets($clientsocket, 4096);         // IGnore response
 128         fclose($clientsocket);
 129         unset($clientsocket);
 130
 131         // Now clear our PHP session.
 132         $_SESSION = array();
 133         session_write_close();
 134 }
 135
 136 ?>