// This program is released under the terms of the GNU General Public License.
//
//
// serv_gets() -- generic function to read one line of text from the server
//
function serv_gets() {
global $clientsocket;
$buf = fgets($clientsocket, 4096); // Read line
$buf = substr($buf, 0, (strlen($buf)-1) ); // strip trailing LF
return $buf;
}
//
// serv_puts() -- generic function to write one line of text to the server
//
function serv_puts($buf) {
global $clientsocket;
fwrite($clientsocket, $buf . "\n", (strlen($buf)+1) );
}
//
// login_existing_user() -- attempt to login using a supplied username/password
// Returns an array with two variables:
// 0. TRUE or FALSE to determine success or failure
// 1. String error message (if relevant)
//
function login_existing_user($user, $pass) {
global $clientsocket;
serv_puts("USER " . $user);
$resp = serv_gets();
if (substr($resp, 0, 1) != "3") {
return array(FALSE, substr($resp, 4));
}
serv_puts("PASS " . $pass);
$resp = serv_gets();
if (substr($resp, 0, 1) != "2") {
return array(FALSE, substr($resp, 4));
}
$_SESSION["username"] = $user;
$_SESSION["password"] = $pass;
become_logged_in(substr($resp, 4));
return array(TRUE, "Login successful. Have fun.");
}
//
// create_new_user() -- attempt to create a new user
// using a supplied username/password
// Returns an array with two variables:
// 0. TRUE or FALSE to determine success or failure
// 1. String error message (if relevant)
//
function create_new_user($user, $pass) {
global $clientsocket;
serv_puts("NEWU " . $user);
$resp = serv_gets();
if (substr($resp, 0, 1) != "2") {
return array(FALSE, substr($resp, 4));
}
serv_puts("SETP " . $pass);
$resp = serv_gets();
if (substr($resp, 0, 1) != "2") {
return array(FALSE, substr($resp, 4));
}
$_SESSION["username"] = $user;
$_SESSION["password"] = $pass;
become_logged_in(substr($resp, 4));
return array(TRUE, "Login successful. Have fun.");
}
//
// Code common to both existing-user and new-user logins
//
function become_logged_in($server_parms) {
$_SESSION["logged_in"] = 1;
}
//
// Learn all sorts of interesting things about the Citadel server to
// which we are connected.
//
function ctdl_get_serv_info() {
serv_puts("INFO");
$buf = serv_gets();
if (substr($buf, 0, 1) == "1") {
$i = 0;
do {
$buf = serv_gets();
if ($i == 2) $_SESSION["serv_humannode"] = $buf;
if ($i == 4) $_SESSION["serv_software"] = $buf;
$i = $i + 1;
} while (strcasecmp($buf, "000"));
}
}
//
// Temporary function to verify communication with the Citadel server.
//
function test_for_echo() {
global $clientsocket, $session;
$command = "ECHO Video vertigo ... test for echo.";
serv_puts($command);
$response = serv_gets();
echo $response, "
";
flush();
}
//
// Display a system banner.
// (This is probably temporary because it outputs more or less finalized
// markup. For now it's just usable.)
//
function ctdl_mesg($msgname) {
global $clientsocket;
serv_puts("MESG " . $msgname);
$response = serv_gets();
if (substr($response, 0, 1) == "1") {
echo "