+<?php
+
+error_reporting(E_ALL | E_STRICT);
+set_time_limit(0);
+
+require('udp-inc.php');
+
+$port = 60825;
+$host = '0.0.0.0';
+
+$leaving = array('/leave', '/logout', '/bye', '/quit');
+$shutdown = array('/shutdown', '/halt');
+$masters = array('127.0.0.1');
+
+// create a streaming socket, of type TCP/IP
+$main_sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
+
+// set the option to reuse the port
+socket_set_option($main_sock, SOL_SOCKET, SO_REUSEADDR, 1);
+
+// "bind" the socket to the address to "localhost", on port $port
+// so this means that all connections on this port are now our resposibility to send/recv data, disconnect, etc..
+socket_bind($main_sock, $host, $port);
+
+// start listen for connections
+socket_listen($main_sock);
+
+// create a list of all the clients that will be connected to us..
+// add the listening socket to this list
+$clients = array($main_sock);
+
+out(__FILE__, __LINE__, '['.date('m/d/Y:H:i:s', time())."]:Server listens on {$host}:{$port}");
+
+while (count($clients) > 0) {
+ // create a copy, so $clients doesn't get modified by socket_select()
+ $read = $clients;
+
+ // get a list of all the clients that have data to be read from
+ // if there are no clients with data, go to next iteration
+ $left = @socket_select($read, $write = null, $except = null, 0, 150);
+ if ($left < 1) {
+ continue;
+ }
+
+ // check if there is a client trying to connect
+ if (in_array($main_sock, $read)) {
+ // accept the client, and add him to the $clients array
+ $new_sock = socket_accept($main_sock);
+ $clients[] = $new_sock;
+
+ // send the client a welcome message
+ socket_write($new_sock, "No noobs, but I'll make an exception. :)\n".
+ "There are ".(count($clients) - 1)." client(s) connected to the server.\n");
+
+ socket_getpeername($new_sock, $ip);
+ out(__FILE__, __LINE__, '['.date('m/d/Y:H:i:s', time())."]:New client connected: {$ip}");
+
+ // Notify all chatter
+ if (count($clients) > 2) {
+ foreach ($clients as $send_sock) {
+ if ($send_sock != $main_sock && $send_sock != $new_sock) {
+ socket_write($send_sock, "Server: Chatter has joined from {$ip}. There are now ".(count($clients) - 1)." clients.\n");
+ }
+ }
+ }
+
+ // remove the listening socket from the clients-with-data array
+ $key = array_search($main_sock, $read);
+ unset($read[$key]);
+ }
+
+ // loop through all the clients that have data to read from
+ foreach ($read as $read_sock) {
+ // Get client data
+ socket_getpeername($read_sock, $ip);
+
+ // read until newline or 1024 bytes
+ // socket_read while show errors when the client is disconnected, so silence the error messages
+ $data = @socket_read($read_sock, 1024, PHP_NORMAL_READ);
+
+ // check if the client is disconnected
+ if (($data === FALSE) || (in_array(strtolower(trim($data)), $leaving))) {
+
+ // remove client for $clients array
+ $key = array_search($read_sock, $clients);
+ unset($clients[$key]);
+ out(__FILE__, __LINE__, '['.date('m/d/Y:H:i:s', time())."]:Client from {$ip} disconnected. Left: ".(count($clients) - 1)."");
+
+ // Notify all chatter
+ if (count($clients) > 1) {
+ foreach ($clients as $send_sock) {
+ if ($send_sock != $main_sock) {
+ socket_write($send_sock, "Server: Chatter from {$ip} has logged out. ".(count($clients) - 1)." client(s) left.\n");
+ }
+ }
+ }
+
+ // continue to the next client to read from, if any
+ socket_write($read_sock, "Server: Good bye.\n");
+ socket_shutdown($read_sock, 2);
+ socket_close($read_sock);
+ continue;
+ } elseif (in_array(trim($data), $shutdown)) {
+ // Is he allowed to shutdown?
+ if (!in_array($ip, $masters)) {
+ out(__FILE__, __LINE__, '['.date('m/d/Y:H:i:s', time())."]:Client {$ip} has tried to shutdown the server!");
+ socket_write($read_sock, "Server: You are not allowed to shutdown the server!\n");
+ $data = "";
+ continue;
+ }
+
+ // Close all connections a leave here
+ foreach ($clients as $client) {
+ // Send message to client
+ if ($client !== $main_sock && $client != $read_sock) {
+ socket_write($client, "Server: Shutting down! Thank you for joining us.\n");
+ }
+
+ // Quit him
+ socket_shutdown($client, 2);
+ socket_close($client);
+ } // end foreach
+
+ // Leave the loop
+ $data = "";
+ $clients = array();
+ continue;
+ }
+
+ // trim off the trailing/beginning white spaces
+ $data = trim($data);
+
+ // Test for HTML codes
+ $tags = strip_tags($data);
+
+ // check if there is any data after trimming off the spaces
+ if (!empty($data) && $tags == $data && count($clients) > 2) {
+ // Send confirmation to "chatter"
+ socket_write($read_sock, "\nServer: Message accepted.\n");
+
+ // send this to all the clients in the $clients array (except the first one, which is a listening socket)
+ foreach ($clients as $send_sock) {
+
+ // if its the listening sock or the client that we got the message from, go to the next one in the list
+ if ($send_sock == $main_sock || $send_sock == $read_sock)
+ continue;
+
+ // write the message to the client -- add a newline character to the end of the message
+ socket_write($send_sock, "{$ip}:{$data}\n");
+
+ } // end of broadcast foreach
+ } elseif ($tags != $data) {
+ // HTML codes are not allowed
+ out(__FILE__, __LINE__, '['.date('m/d/Y:H:i:s', time())."]:Client {$ip} has entered HTML code!");
+ socket_write($read_sock, "Server: HTML is forbidden!\n");
+ } elseif ((count($clients) == 2) && ($read_sock != $main_sock)) {
+ // No one else will hear the "chatter"
+ out(__FILE__, __LINE__, '['.date('m/d/Y:H:i:s', time())."]:Client {$ip} speaks with himself.");
+ socket_write($read_sock, "Server: No one will hear you!\n");
+ }
+ } // end of reading foreach
+}
+
+// close the listening socket
+socket_close($main_sock);
+
+?>
projects / hub.git / commitdiff