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/" . $session . ".socket" ;
  37
  38         if (is_array(stat($sockname)))
  39                 $clientsocket = fsockopen(SOCKET_PREFIX.$sockname, 0, $errno, $errstr, 5);
  40         else
  41                 $clientsocket = false;
  42         if (!$clientsocket) {
  43                 // It ain't there, dude.  Open up the proxy. (C version)
  44                 //$cmd = "./sessionproxy " . $sockname ;
  45                 //exec($cmd);
  46
  47                 // It ain't there, dude.  Open up the proxy.  (PHP version)
  48                 if (CITADEL_DEBUG_PROXY){
  49                         $stdout = '>>/tmp/sessionproxyout.txt ';
  50                 }
  51                 else{
  52                         $stdout = '>/dev/null ';
  53                 }
  54
  55                 $cmd = "./sessionproxy.php " . $sockname .
  56                         " </dev/null ".$stdout."2>&1 " .
  57                         " 3>&1 4>&1 5>&1 6>&1 7>&1 8>&1 & " ;
  58                 exec($cmd);
  59                 sleep(1);
  60
  61                 // Keep attempting connections 10 times per second up to 100 times
  62                 $attempts = 0;
  63                 while (!$clientsocket) {
  64                         usleep(100);
  65                         if (is_array(stat($sockname)))
  66                                 $clientsocket = fsockopen(SOCKET_PREFIX.$sockname, 0, $errno, $errstr, 5);
  67                         else
  68                                 $clientsocket = false;
  69                         $attempts += 1;
  70                         if ($attempts > 100) {
  71                                 echo "ERROR: unable to start connection proxy. ";
  72                                 echo "Please contact your system administrator.<BR>\n";
  73                                 flush();
  74                                 exit(1);
  75                         }
  76                 }
  77
  78                 // At this point we have a good connection to Citadel.
  79                 $identity=array(
  80                         "DevelNr" => '0',
  81                         "ClientID" => '8',
  82                         "VersionNumber" => '001',
  83                         "ClientInfoString" => 'PHP web client|',
  84                         "Remote Address" => $_SERVER['REMOTE_ADDR'] );
  85
  86                 ctdl_iden($identity);   // Identify client
  87                 ctdl_MessageFormatsPrefered(array("text/html","text/plain"));
  88                 if (isset($_SESSION["username"])) {
  89                         login_existing_user(
  90                                 $_SESSION["username"],
  91                                 $_SESSION["password"]
  92                         );
  93                 }
  94
  95                 if (isset($_SESSION["room"])) {
  96                         ctdl_goto($_SESSION["room"]);
  97                 }
  98                 else {
  99                         ctdl_goto("_BASEROOM_");
 100                 }
 101         }
 102
 103         if (!isset($_SESSION["serv_humannode"])) {
 104                 $server_info = ctdl_get_serv_info();
 105                 // print_r($server_info);
 106                 $keys = array_keys($server_info);
 107                 foreach ($keys as $key)
 108                         $_SESSION[$key] = $server_info[$key];
 109         }
 110
 111         // If the user is trying to call up any page other than
 112         // login.php logout.php do_login.php,
 113         // and the session is not logged in, redirect to login.php
 114         //
 115         if (isset($_SESSION["logged_in"]) && ($_SESSION["logged_in"] != 1)) {
 116                 $filename = basename(getenv('SCRIPT_NAME'));
 117                 if (    (strcmp($filename, "login.php"))
 118                    &&   (strcmp($filename, "logout.php"))
 119                    &&   (strcmp($filename, "do_login.php"))
 120                 ) {
 121                         header("Location: login.php");
 122                         exit(0);
 123                 }
 124         }
 125
 126
 127 }
 128
 129
 130 //
 131 // Clear out both our Citadel session and our PHP session.  We're done.
 132 //
 133 function ctdl_end_session() {
 134         global $clientsocket, $session;
 135
 136         // Tell the Citadel server to terminate our connection.
 137         // (The extra newlines force it to see that the Citadel session
 138         // ended, and the proxy will quit.)
 139         //
 140         fwrite($clientsocket, "QUIT\n\n\n\n\n\n\n\n\n\n\n");
 141         $response = fgets($clientsocket, 4096);         // IGnore response
 142         fclose($clientsocket);
 143         unset($clientsocket);
 144
 145         // Now clear our PHP session.
 146         $_SESSION = array();
 147         session_write_close();
 148 }
 149
 150 ?>