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Initial commit
author Ivo Smits <Ivo@UCIS.nl>
date Mon, 28 Feb 2011 00:49:07 +0100
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-1:000000000000 0:dd81c38b513a
1 #!/usr/bin/php
2 <?php
3 /* Copyright 2010 Ivo Smits <Ivo@UCIS.nl>. All rights reserved.
4 Redistribution and use in source and binary forms, with or without modification, are
5 permitted provided that the following conditions are met:
6
7 1. Redistributions of source code must retain the above copyright notice, this list of
8 conditions and the following disclaimer.
9
10 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 of conditions and the following disclaimer in the documentation and/or other materials
12 provided with the distribution.
13
14 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
15 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
16 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
17 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
21 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
22 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23
24 The views and conclusions contained in the software and documentation are those of the
25 authors and should not be interpreted as representing official policies, either expressed
26 or implied, of Ivo Smits.*/
27
28 srand();
29
30 $listchannels = array();
31 $channels = array();
32
33 $udpmsg = NULL;
34 $udpmsg_buffer = '';
35
36 $client_name = NULL;
37 $client_buffer = '';
38
39 srand();
40
41 require 'config.php';
42
43 client_send(':server NOTICE AUTH :*** Not looking up your hostname, we do not care.');
44 client_send(':server NOTICE AUTH :*** Not checking ident, are you serious?');
45
46 while ($client_name === NULL) {
47 $line = client_read_line();
48 $partsa = explode(' :', $line, 2);
49 $parts = explode(' ', $partsa[0]);
50 $command = array_shift(&$parts);
51 if (count($partsa) > 1) array_push(&$parts, $partsa[1]);
52 switch (strtoupper($command)) {
53 case 'NICK': //Nickname change: newnick = $parts[0]
54 if (!preg_match('/^[a-zA-Z0-9\-_]+$/', $parts[0])) {
55 client_sendnumeric(432, $parts[0].' :Erroneous nickname');
56 } else {
57 $client_name = $parts[0];
58 client_sendnumeric(001, ':Welcome to the Internet Relay Chat Network');
59 client_sendnumeric(002, ':Your host is UDPMSG3-IRCD');
60 client_sendnumeric(003, ':This server was created some time ago');
61 client_sendnumeric(004, 'irc.udpmsg3.local 1.0 + +');
62 client_sendnumeric(005, 'NICKLEN=16 CHANNELLEN=16 CHANTYPES=# NETWORK=UDPMSG3 :are supported by this server');
63 client_sendnumeric(251, ':There are 1 users and some invisible on a bunch of servers');
64 client_sendnumeric(252, '0 :operator(s) online');
65 client_sendnumeric(254, count($config['channels']).' :channels formed');
66 client_sendnumeric(255, ':I have a bunch of clients and a bunch of servers');
67 client_sendnumeric(265, ':Current Local Users: undisclosed');
68 client_sendnumeric(266, ':Current Global Users: unknown');
69 client_sendnumeric(375, ':- server Message of the Day - ');
70 client_sendnumeric(372, ':- No message, sorry.');
71 client_sendnumeric(376, ':End of /MOTD command.');
72 }
73 case 'USER':
74 case 'PASS':
75 break;
76 default:
77 client_sendnumeric(421, $command.' :Unknown command');
78 }
79 }
80
81 $udpmsg = stream_socket_client('tcp://'.$config['udpmsg']['host'].':'.$config['udpmsg']['port']);
82 if (!$udpmsg) {
83 client_send('ERROR :Could not connect to exchange.');
84 die();
85 }
86
87 while (TRUE) {
88 $selwrite = NULL;
89 $selread = array($udpmsg, STDIN);
90 $selerror = array($udpmsg, STDIN);
91 stream_select(&$selread, &$selwrite, &$selerror, 10);
92 if (in_array($udpmsg, $selerror)) {
93 fclose($udpmsg);
94 client_send('ERROR :Lost connection to exchange.');
95 die();
96 } else {
97 if (in_array($udpmsg, $selread)) {
98 if (!udpmsg_read($udpmsg)) {
99 fclose($udpmsg);
100 client_send('ERROR :Error in exchange protocol.');
101 die();
102 }
103 }
104 }
105 if (in_array(STDIN, $selerror)) {
106 fclose($udpmsg);
107 client_send('ERROR :Error while reading from client.');
108 die();
109 } else if (in_array(STDIN, $selread)) {
110 if (!client_read()) {
111 fclose($udpmsg);
112 client_send('ERROR :End of file.');
113 die();
114 }
115 }
116 }
117
118 function udpmsg_read() {
119 global $channels, $udpmsg, $udpmsg_buffer, $config;
120 $msg = fread($udpmsg, 1024);
121 if (!strlen($msg)) return FALSE;
122 $udpmsg_buffer .= $msg;
123 while (strlen($udpmsg_buffer) > 2) {
124 $len = ord($udpmsg_buffer[0]) * 256 + ord($udpmsg_buffer[1]);
125 if ($len <= 0 || $len > 1024) return FALSE;
126 if (strlen($udpmsg_buffer) < 2 + $len) break;
127 $msg = substr($udpmsg_buffer, 2, $len);
128 $udpmsg_buffer = substr($udpmsg_buffer, 2 + $len);
129 $parts = explode("\0", $msg);
130 $ret = array();
131 for ($i = 0; $i < count($parts)-1; $i += 2) $ret[$parts[$i]] = $parts[$i+1];
132
133 if (!isset($ret['CHN']) || !isset($ret['CMD']) || !isset($ret['USR'])) continue;
134 if (!substr($ret['CHN'], 0, strlen($config['udpmsg']['chprefix']))) continue;
135 $chn = '#'.substr($ret['CHN'], strlen($config['udpmsg']['chprefix']));
136 if (!in_array($chn, $channels)) continue;
137 if ($ret['CMD'] == 'MSG') {
138 if (!isset($ret['MSG'])) continue;
139 $from = preg_replace('/[^a-zA-Z0-9\-_]/', '', $ret['USR']);
140 if ($config['udpmsg']['nicknetwork'] && isset($ret['NET'])) $from = preg_replace('/[^a-zA-Z0-9\-_]/', '', $ret['NET']).$config['udpmsg']['nickseparator'].$from;
141 $from = $config['udpmsg']['nickprefix'].$from;
142 $message = preg_replace('/[\x00\x10-\x13]/', '', $ret['MSG']);
143 client_send(':'.$from.' PRIVMSG '.$chn.' :'.$message);
144 }
145 }
146 return TRUE;
147 }
148
149 function udpmsg_send($arr) {
150 global $udpmsg;
151 $tmp = array();
152 foreach ($arr as $key => $value) { $tmp[] = $key; $tmp[] = $value; }
153 $tmp[] = '';
154 $msg = implode("\0", $tmp);
155 $len = strlen($msg);
156 if ($len > 1024) return;
157 $lens = chr(floor($len / 256)).chr($len % 256);
158 fwrite($udpmsg, $lens.$msg);
159 }
160
161 function array_remove(&$arr, $item) {
162 foreach ($arr as $key => $value) if ($value === $item) unset($arr[$key]);
163 }
164
165 function client_read() {
166 global $client_buffer;
167 $newdata = fread(STDIN, 1024);
168 if ($newdata === FALSE || !strlen($newdata)) return FALSE;
169 $client_buffer .= $newdata;
170 $offset = 0;
171 $len = strlen($client_buffer);
172 while ($offset < $len) {
173 $posa = strpos($client_buffer, "\n", $offset);
174 $posb = strpos($client_buffer, "\r", $offset);
175 if ($posa !== FALSE && $posb !== FALSE) {
176 $pos = min($posa, $posb);
177 } else if ($posa !== FALSE) {
178 $pos = $posa;
179 } else if ($posb !== FALSE) {
180 $pos = $posb;
181 } else {
182 break;
183 }
184 $line = substr($client_buffer, $offset, $pos - $offset);
185 if (strlen($line)) {
186 if (!client_process($line)) return FALSE;
187 }
188 $offset = $pos + 1;
189 }
190 if ($offset == $len) {
191 $client_buffer = '';
192 } else if ($offset != 0) {
193 $client_buffer = substr($client_buffer, $offset);
194 }
195 return TRUE;
196 }
197
198 function client_process($line) {
199 global $client_name, $config;
200 $partsa = explode(' :', $line, 2);
201 $parts = explode(' ', $partsa[0]);
202 $command = array_shift(&$parts);
203 if (count($partsa) > 1) array_push(&$parts, $partsa[1]);
204 switch (strtoupper($command)) {
205 case 'NICK':
206 if (!preg_match('/^[a-zA-Z0-9\-_]+$/', $parts[0])) {
207 client_sendnumeric(432, $parts[0].' :Erroneous nickname');
208 } else {
209 $client_name = $parts[0];
210 }
211 break;
212 case 'PING':
213 client_send('PONG :'.$parts[0]);
214 break;
215 case 'PRIVMSG':
216 case 'NOTICE':
217 $channels = explode(',', $parts[0]);
218 foreach ($channels as $chn) {
219 if ($chn[0] == '#') {
220 if (!in_array($chn, $GLOBALS['channels'])) {
221 client_sendnumeric(404, $chn.' :Can not send to channel');
222 } else {
223 $umsg = array('CMD' => 'MSG', 'CHN' => $config['udpmsg']['chprefix'].substr($chn, 1), 'MSG' => $parts[1], 'USR' => $client_name, 'DUMMY' => rand(10000, 99999));
224 if ($config['udpmsg']['netname']) $umsg['NET'] = $config['udpmsg']['netname'];
225 udpmsg_send($umsg);
226 }
227 } else {
228 client_sendnumeric(401, $chn.' :No such nickname');
229 }
230 }
231 break;
232 case 'JOIN':
233 $channels = explode(',', $parts[0]);
234 foreach ($channels as $chn) {
235 if (!preg_match('/^#[a-zA-Z0-9\-_]+$/', $chn)) {
236 client_sendnumeric($client, 403, $chn.' :No such channel');
237 continue;
238 }
239 if (!in_array($chn, $GLOBALS['channels'])) {
240 client_send(':'.$client_name.'!user@host JOIN :'.$chn);
241 $GLOBALS['channels'][] = $chn;
242 }
243 client_sendnumeric(353, '= '.$chn.' :'.$client_name);
244 client_sendnumeric(366, $chn.' :End of /NAMES list.');
245 }
246 break;
247 case 'PART':
248 client_send(':'.$client_name.'!user@host PART :'.$chn);
249 array_remove($GLOBALS['channels'], $chn);
250 break;
251 case 'QUIT':
252 return FALSE;
253 case 'NAMES':
254 client_sendnumeric(353, '= '.$parts[0].' :'.$client_name);
255 client_sendnumeric(366, $parts[0].' :End of /NAMES list.');
256 break;
257 case 'LIST':
258 client_sendnumeric($client, 321, 'Channel :Users Name');
259 foreach ($GLOBALS['listchannels'] as $chn) {
260 client_sendnumeric(322, $chn.' 0 :');
261 }
262 client_sendnumeric(323, 'End of /LIST');
263 break;
264 case 'MODE':
265 case 'USER':
266 case 'USERHOST':
267 break;
268 default:
269 client_sendnumeric(421, $command.' :Unknown command');
270 }
271 return TRUE;
272 }
273
274 function client_sendnumeric($num, $line) {
275 global $client_name;
276 client_send(':server '.str_pad($num, 3, '0', STR_PAD_LEFT).' '.$client_name.' '.$line);
277 }
278
279 function client_send($line) {
280 print($line."\r\n");
281 }
282
283 function client_read_line() {
284 $line = fgets(STDIN);
285 if (!strlen($line)) {
286 client_send('ERROR :End of file.');
287 die();
288 }
289 return rtrim($line, "\r\n\x0B");
290 }