// 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) );
fflush($clientsocket);
}
//
// Identify ourselves to the Citadel server (do this once after connection)
//
function ctdl_iden() {
global $clientsocket;
// Identify client and hostname
serv_puts("IDEN 0|8|001|PHP web client|" . $_SERVER['REMOTE_ADDR'] );
$buf = serv_gets();
// Also express our message format preferences
serv_puts("MSGP text/html|text/plain");
$buf = serv_gets();
}
//
// login_existing_user() -- attempt to login using a supplied username/password
// Returns an array with two variables:
// 0. TRUE or FALSE to determine success or failure
// 1. String error message (if relevant)
//
function login_existing_user($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;
$tok = strtok($server_parms, "|");
if ($tok) $thisline["username"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["axlevel"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["calls"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["posts"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["userflags"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["usernum"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["lastcall"] = $tok;
ctdl_goto("_BASEROOM_");
}
//
// 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 == 1) $_SESSION["serv_nodename"] = $buf;
if ($i == 2) $_SESSION["serv_humannode"] = $buf;
if ($i == 3) $_SESSION["serv_fqdn"] = $buf;
if ($i == 4) $_SESSION["serv_software"] = $buf;
if ($i == 6) $_SESSION["serv_city"] = $buf;
if ($i == 7) $_SESSION["serv_sysadmin"] = $buf;
$i = $i + 1;
} while (strcasecmp($buf, "000"));
}
}
//
// Display a system banner. (Returns completed HTML.)
// (This is probably temporary because it outputs more or less finalized
// markup. For now it's just usable.)
//
function ctdl_mesg($msgname) {
global $clientsocket;
$msgtext = "
\n";
serv_puts("MESG " . $msgname);
$response = serv_gets();
if (substr($response, 0, 1) == "1") {
while (strcmp($buf = serv_gets(), "000")) {
$msgtext .= "" . htmlspecialchars($buf)
. "
\n" ;
}
}
else {
$msgtext .= "" . substr($response, 4) . "
\n";
}
$msgtext .= "
\n";
return($msgtext);
}
//
// Fetch the list of users currently logged in.
//
function ctdl_rwho() {
global $clientsocket;
serv_puts("RWHO");
$response = serv_gets();
if (substr($response, 0, 1) != "1") {
return array(0, NULL);
}
$all_lines = array();
$num_lines = 0;
while (strcmp($buf = serv_gets(), "000")) {
$thisline = array();
$tok = strtok($buf, "|");
if ($tok) $thisline["session"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["user"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["room"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["host"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["client"] = $tok;
// IGnore the rest of the fields for now.
$num_lines = array_push($all_lines, $thisline);
}
return array($num_lines, $all_lines);
}
//
// Goto a room.
//
function ctdl_goto($to_where) {
serv_puts("GOTO " . $to_where);
$response = serv_gets();
if (substr($response, 0, 1) == "2") {
$_SESSION["room"] = strtok(substr($response, 4), "|");
return array(TRUE, substr($response, 0, 3));
}
else {
return array(FALSE, substr($response, 0, 3));
}
}
//
// Fetch the list of known rooms.
//
function ctdl_knrooms() {
global $clientsocket;
serv_puts("LKRA");
$response = serv_gets();
if (substr($response, 0, 1) != "1") {
return array(0, NULL);
}
$all_lines = array();
$num_lines = 0;
while (strcmp($buf = serv_gets(), "000")) {
$thisline = array();
$tok = strtok($buf, "|");
if ($tok) $thisline["name"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["flags"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["floor"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["order"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["flags2"] = $tok;
$tok = strtok("|");
if ($tok) $thisline["access"] = $tok;
if ($thisline["access"] & 8) {
$thisline["hasnewmsgs"] = TRUE;
}
else {
$thisline["hasnewmsgs"] = FALSE;
}
$num_lines = array_push($all_lines, $thisline);
}
return array($num_lines, $all_lines);
}
//
// Fetch the list of messages in this room.
// Returns: count, response, message array
//
function ctdl_msgs($mode, $count) {
global $clientsocket;
serv_puts("MSGS " . $mode . "|" . $count);
$response = serv_gets();
if (substr($response, 0, 1) != "1") {
return array(0, substr($response, 4), NULL);
}
$msgs = array();
$num_msgs = 0;
while (strcmp($buf = serv_gets(), "000")) {
$num_msgs = array_push($msgs, $buf);
}
return array($num_msgs, substr($response, 4), $msgs);
}
// Load a message from the server.
function ctdl_fetch_message($msgnum) {
global $clientsocket;
serv_puts("MSG4 " . $msgnum);
$response = serv_gets();
if (substr($response, 0, 1) != "1") {
return array(FALSE, substr($response, 4), NULL);
}
$fields = array();
while (strcmp($buf = serv_gets(), "000")) {
if (substr($buf, 0, 4) == "text") {
// We're in the text body. New loop here.
$fields["text"] = ctdl_msg4_from_server();
return array(TRUE, substr($response, 4), $fields);
}
else {
$fields[substr($buf, 0, 4)] = substr($buf, 5);
}
}
// Message terminated prematurely (no text body)
return array(FALSE, substr($response, 4), $fields);
}
// Support function for ctdl_fetch_message(). This handles the text body
// portion of the message, converting various formats to HTML as
// appropriate.
function ctdl_msg4_from_server() {
$txt = "";
$msgformat = "text/plain";
$in_body = FALSE;
$previous_line = "";
while (strcmp($buf = serv_gets(), "000")) {
if ($in_body == FALSE) {
if (strlen($buf) == 0) {
$in_body = TRUE;
}
else {
if (!strncasecmp($buf, "content-type: ", 14)) {
$msgformat = substr($buf, 14);
}
}
}
else {
if (!strcasecmp($msgformat, "text/html")) {
$txt .= $buf;
}
else if (!strcasecmp($msgformat, "text/plain")) {
$txt .= "" . htmlspecialchars($buf) . "
\n" ;
}
else if (!strcasecmp($msgformat, "text/x-citadel-variformat")) {
if (substr($previous_line, 0, 1) == " ") {
$txt .= "
\n" ;
}
$txt .= htmlspecialchars($buf);
}
else {
$txt .= htmlspecialchars($buf);
}
$previous_line = $buf;
}
}
return($txt);
}
?>