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.
7 // Web designers: please make changes in ctdlheader.php, not here.
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.
13 function establish_citadel_session() {
15 global $session, $clientsocket;
17 if (strcmp('4.3.0', phpversion()) > 0) {
18 die("This program requires PHP 4.3.0 or newer.");
24 if (isset($_SESSION["ctdlsession"])) {
25 $session = $_SESSION["ctdlsession"];
28 $session = "CtdlSession." . time() . rand(1000,9999) ;
29 $_SESSION["ctdlsession"] = $session;
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.
36 $sockname = "/tmp/" . $session . ".socket" ;
38 $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
40 // It ain't there, dude. Open up the proxy. (C version)
41 //$cmd = "./sessionproxy " . $sockname ;
44 // It ain't there, dude. Open up the proxy. (PHP version)
45 $cmd = "./sessionproxy.php " . $sockname .
46 " </dev/null >/dev/null 2>&1 " .
47 " 3>&1 4>&1 5>&1 6>&1 7>&1 8>&1 & " ;
50 // Keep attempting connections 10 times per second up to 100 times
52 while (!$clientsocket) {
54 $clientsocket = fsockopen($sockname, 0, $errno, $errstr, 5);
56 if ($attempts > 100) {
57 echo "ERROR: unable to start connection proxy. ";
58 echo "Please contact your system administrator.<BR>\n";
64 // At this point we have a good connection to Citadel.
66 ctdl_iden(); // Identify client
68 if ($_SESSION["username"]) {
70 $_SESSION["username"],
75 if ($_SESSION["room"]) {
76 ctdl_goto($_SESSION["room"]);
79 ctdl_goto("_BASEROOM_");
83 if (!isset($_SESSION["serv_humannode"])) {
87 // If the user is trying to call up any page other than
88 // login.php logout.php do_login.php,
89 // and the session is not logged in, redirect to login.php
91 if (isset($_SESSION["logged_in"]) && ($_SESSION["logged_in"] != 1)) {
92 $filename = basename(getenv('SCRIPT_NAME'));
93 if ( (strcmp($filename, "login.php"))
94 && (strcmp($filename, "logout.php"))
95 && (strcmp($filename, "do_login.php"))
97 header("Location: login.php");
107 // Clear out both our Citadel session and our PHP session. We're done.
109 function ctdl_end_session() {
110 global $clientsocket, $session;
112 // Tell the Citadel server to terminate our connection.
113 // (The extra newlines force it to see that the Citadel session
114 // ended, and the proxy will quit.)
116 fwrite($clientsocket, "QUIT\n\n\n\n\n\n\n\n\n\n\n");
117 $response = fgets($clientsocket, 4096); // IGnore response
118 fclose($clientsocket);
119 unset($clientsocket);
121 // Now clear our PHP session.
123 session_write_close();