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1 <?php |
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2 /* Copyright 2010 Ivo Smits <Ivo@UCIS.nl>. All rights reserved. |
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3 Redistribution and use in source and binary forms, with or without modification, are |
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4 permitted provided that the following conditions are met: |
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5 |
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6 1. Redistributions of source code must retain the above copyright notice, this list of |
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7 conditions and the following disclaimer. |
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8 |
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9 2. Redistributions in binary form must reproduce the above copyright notice, this list |
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10 of conditions and the following disclaimer in the documentation and/or other materials |
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11 provided with the distribution. |
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12 |
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13 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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14 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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15 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR |
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16 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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17 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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18 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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19 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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20 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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21 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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22 |
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23 The views and conclusions contained in the software and documentation are those of the |
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24 authors and should not be interpreted as representing official policies, either expressed |
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25 or implied, of Ivo Smits.*/ |
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26 |
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27 if (defined('app_loaded')) return; |
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28 define('app_loaded', TRUE); |
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29 if (!isset($config)) include './config.php'; |
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30 |
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31 print("UCIS UDPMSG3 IRC server (c) 2010 Ivo Smits <Ivo@UCIS.nl>\n"); |
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32 print("More information: http://wiki.ucis.nl/UDPMSG3\n"); |
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33 print("\n"); |
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34 |
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35 srand(); |
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36 |
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37 class Channel { |
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38 public $name = NULL; |
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39 public $udpmsg = FALSE; |
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40 public $users = array(); |
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41 public $persistent = FALSE; |
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42 public function __construct($name) { $this->name = $name; } |
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43 } |
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44 class Client { |
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45 public $socket = NULL; |
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46 public $name = NULL; |
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47 public $channels = array(); |
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48 public $readbuffer = ''; |
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49 } |
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50 |
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51 $channels = array(); |
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52 $clients = array(); |
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53 $udpmsg = NULL; |
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54 $udpmsg_config = NULL; |
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55 $udpmsg_connected = FALSE; |
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56 $udpmsg_timer = 0; |
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57 $udpmsg_buffer = ''; |
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58 $udpmsg_channels = array(); |
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59 $listener = NULL; |
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60 |
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61 srand(); |
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62 |
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63 prepare(); |
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64 configure(); |
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65 init(); |
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66 readloop(); |
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67 |
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68 function getchannel($name) { |
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69 global $channels; |
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70 if (array_key_exists($name, $channels)) return $channels[$name]; |
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71 $ch = new Channel($name); |
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72 $channels[$name] = $ch; |
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73 return $ch; |
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74 } |
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75 function configure() { |
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76 global $channels, $config; |
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77 global $udpmsg, $udpmsg_config, $udpmsg_channels; |
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78 |
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79 print("Parsing configuration...\n"); |
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80 //require 'config.php'; |
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81 |
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82 if (isset($config['udpmsg'])) { |
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83 $udpmsg_config = $config['udpmsg']; |
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84 $udpmsg = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); |
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85 socket_set_nonblock($udpmsg); |
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86 @socket_connect($udpmsg, $udpmsg_config['host'], $udpmsg_config['port']); |
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87 } |
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88 foreach ($config['channels'] as $key => $cf) { |
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89 $ch = getchannel($key); |
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90 $ch->persistent = TRUE; |
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91 if (isset($cf['udpmsg'])) { |
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92 $ch->udpmsg = $cf['udpmsg']; |
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93 $udpmsg_channels[$cf['udpmsg']] = $ch; |
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94 } |
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95 } |
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96 } |
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97 |
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98 function prepare() { |
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99 global $channels; |
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100 print("Starting IRC Relay...\n"); |
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101 } |
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102 |
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103 function init() { |
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104 global $listener; |
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105 print("Initializing...\n"); |
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106 $listener = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); |
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107 socket_bind($listener, '0.0.0.0', 7777) or die("Could not bind listening socket.\n"); |
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108 socket_listen($listener) or die("Could not start listening.\n"); |
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109 } |
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110 |
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111 function readloop() { |
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112 global $channels, $clients, $udpmsg, $listener, $udpmsg_connected, $udpmsg_config, $udpmsg_timer; |
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113 |
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114 $ltime = 0; |
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115 |
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116 print("Running\n"); |
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117 while (TRUE) { |
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118 $ntime = time(); |
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119 $tdiff = $ntime - $ltime; |
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120 $ltime = $ntime; |
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121 |
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122 if ($udpmsg === NULL && $udpmsg_config['host'] !== NULL) { |
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123 $udpmsg_timer += $tdiff; |
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124 if ($udpmsg_timer >= 30) { |
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125 fprintf(STDERR, "UDPMSG: Reconnecting...\n"); |
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126 $udpmsg = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); |
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127 socket_set_nonblock($udpmsg); |
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128 @socket_connect($udpmsg, $udpmsg_config['host'], $udpmsg_config['port']); |
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129 $udpmsg_timer = 0; |
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130 } |
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131 } |
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132 |
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133 $selread = array(); |
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134 $selwrite = array(); |
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135 $selerror = array(); |
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136 |
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137 if ($udpmsg !== NULL) { |
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138 $selread[] = $udpmsg; |
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139 $selerror[] = $udpmsg; |
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140 if (!$udpmsg_connected) $selwrite[] = $udpmsg; |
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141 } |
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142 $selread[] = $listener; |
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143 |
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144 foreach ($clients as $client) { |
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145 $selread[] = $client->socket; |
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146 $selerror[] = $client->socket; |
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147 } |
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148 |
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149 socket_select(&$selread, &$selwrite, &$selerror, 10); |
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150 |
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151 if (in_array($listener, $selread)) { |
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152 client_accept($listener); |
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153 } |
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154 |
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155 if (in_array($udpmsg, $selerror)) { |
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156 fprintf(STDERR, "UDPMSG: Error: select error.\n"); |
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157 socket_close($udpmsg); |
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158 $udpmsg = NULL; |
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159 $udpmsg_connected = FALSE; |
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160 } else { |
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161 if (in_array($udpmsg, $selwrite) && !$udpmsg_connected) { |
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162 fprintf(STDERR, "UDPMSG: Connected.\n"); |
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163 $udpmsg_buffer = ''; |
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164 $udpmsg_connected = TRUE; |
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165 } |
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166 if (in_array($udpmsg, $selread)) { |
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167 if (!udpmsg_read($udpmsg)) { |
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168 fprintf(STDERR, "UDPMSG: Error: closing connection.\n"); |
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169 socket_close($udpmsg); |
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170 $udpmsg = NULL; |
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171 $udpmsg_connected = FALSE; |
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172 } |
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173 } |
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174 } |
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175 |
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176 foreach ($clients as $client) { |
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177 if (in_array($client->socket, $selerror)) { |
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178 client_close($client); |
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179 } else if (in_array($client->socket, $selread)) { |
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180 if (!client_read($client)) { |
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181 client_close($client); |
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182 } |
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183 } |
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184 } |
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185 } |
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186 } |
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187 |
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188 function client_accept($listener) { |
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189 global $clients; |
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190 $client = new Client(); |
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191 $client->socket = socket_accept($listener); |
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192 if (!$client->socket) return; |
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193 if (!socket_getpeername($client->socket, &$addr, &$port)) $addr = 'unknown'; |
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194 fprintf(STDERR, 'Accepted client '.$addr.':'.$port."\n"); |
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195 client_send($client, ':server NOTICE AUTH :*** Not looking up your hostname, we do not care.'); |
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196 client_send($client, ':server NOTICE AUTH :*** Not checking ident, are you serious?'); |
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197 $clients[(int)($client->socket)] = $client; |
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198 } |
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199 |
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200 function client_close($client, $reason = '') { |
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201 global $clients, $channels; |
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202 socket_close($client->socket); |
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203 array_remove($clients, $client); |
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204 $users = array(); |
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205 foreach ($client->channels as $ch) { |
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206 array_remove($ch->users, $client); |
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207 if (count($ch->users)) { |
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208 foreach ($ch->users as $user) if (!in_array($user, $users)) $users[] = $user; |
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209 } elseif (!$ch->persistent) { |
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210 array_remove($channels, $ch); |
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211 } |
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212 } |
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213 foreach ($users as $user) client_send($user, ':'.$client->name.' QUIT :'.$reason); |
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214 } |
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215 |
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216 function udpmsg_read() { |
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217 global $channels, $clients, $udpmsg, $udpmsg_buffer, $udpmsg_channels, $udpmsg_config; |
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218 $msg = socket_read($udpmsg, 1024); |
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219 if (!strlen($msg)) { |
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220 fprintf(STDERR, "UDPMSG: End of file\n"); |
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221 return FALSE; |
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222 } |
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223 $udpmsg_buffer .= $msg; |
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224 while (strlen($udpmsg_buffer) > 2) { |
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225 $len = ord($udpmsg_buffer[0]) * 256 + ord($udpmsg_buffer[1]); |
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226 if ($len <= 0 || $len > 1024) { |
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227 fprintf(STDERR, "UDPMSG: Error: protocol error\n"); |
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228 return FALSE; |
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229 } |
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230 if (strlen($udpmsg_buffer) < 2 + $len) break; |
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231 $msg = substr($udpmsg_buffer, 2, $len); |
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232 $udpmsg_buffer = substr($udpmsg_buffer, 2 + $len); |
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233 $parts = explode("\0", $msg); |
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234 $ret = array(); |
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235 for ($i = 0; $i < count($parts)-1; $i += 2) $ret[$parts[$i]] = $parts[$i+1]; |
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236 |
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237 if (!isset($ret['CHN']) || !isset($ret['CMD']) || !isset($ret['USR'])) continue; |
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238 if (!array_key_exists($ret['CHN'], $udpmsg_channels)) continue; |
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239 $ch = $udpmsg_channels[$ret['CHN']]; |
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240 if ($ret['CMD'] == 'MSG') { |
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241 if (!isset($ret['MSG'])) continue; |
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242 $from = preg_replace('/[^a-zA-Z0-9\-_]/', '', $ret['USR']); |
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243 if ($udpmsg_config['nicknetwork'] && isset($ret['NET'])) $from = preg_replace('/[^a-zA-Z0-9\-_]/', '', $ret['NET']).$udpmsg_config['nickseparator'].$from; |
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244 $from = $udpmsg_config['nickprefix'].$from; |
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245 $message = preg_replace('/[\x00\x10-\x13]/', '', $ret['MSG']); |
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246 channel_send($ch, NULL, ':'.$from.' PRIVMSG '.$ch->name.' :'.$message); |
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247 } |
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248 } |
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249 return TRUE; |
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250 } |
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251 |
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252 function udpmsg_send($arr) { |
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253 global $udpmsg, $udpmsg_connected; |
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254 if (!$udpmsg || !$udpmsg_connected) return; |
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255 $tmp = array(); |
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256 foreach ($arr as $key => $value) { $tmp[] = $key; $tmp[] = $value; } |
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257 $tmp[] = ''; |
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258 $msg = implode("\0", $tmp); |
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259 $len = strlen($msg); |
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260 if ($len > 1024) { |
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261 fprintf(STDERR, "UDPMSG: Error: message too long!\n"); |
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262 return; |
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263 } |
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264 $lens = chr(floor($len / 256)).chr($len % 256); |
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265 socket_write($udpmsg, $lens.$msg); |
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266 } |
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267 |
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268 |
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269 function array_remove(&$arr, $item) { |
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270 foreach ($arr as $key => $value) if ($value === $item) unset($arr[$key]); |
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271 } |
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272 |
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273 function find_nick($nick) { |
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274 global $clients; |
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275 $nick = strtoupper($nick); |
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276 foreach ($clients as $client) if (strtoupper($client->name) == $nick) return $client; |
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277 return FALSE; |
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278 } |
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279 |
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280 function client_read($client) { |
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281 $newdata = socket_read($client->socket, 1024); |
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282 if ($newdata === FALSE || !strlen($newdata)) return FALSE; |
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283 $client->readbuffer .= $newdata; |
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284 $offset = 0; |
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285 $len = strlen($client->readbuffer); |
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286 while ($offset < $len) { |
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287 $posa = strpos($client->readbuffer, "\n", $offset); |
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288 $posb = strpos($client->readbuffer, "\r", $offset); |
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289 if ($posa !== FALSE && $posb !== FALSE) { |
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290 $pos = min($posa, $posb); |
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291 } else if ($posa !== FALSE) { |
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292 $pos = $posa; |
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293 } else if ($posb !== FALSE) { |
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294 $pos = $posb; |
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295 } else { |
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296 break; |
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297 } |
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298 $line = substr($client->readbuffer, $offset, $pos - $offset); |
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299 if (strlen($line)) { |
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300 if (!client_process($client, $line)) return FALSE; |
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301 } |
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302 $offset = $pos + 1; |
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303 } |
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304 if ($offset == $len) { |
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305 $client->readbuffer = ''; |
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306 } else if ($offset != 0) { |
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307 $client->readbuffer = substr($client->readbuffer, $offset); |
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308 } |
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309 return TRUE; |
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310 } |
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311 |
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312 function client_process($client, $line) { |
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313 $partsa = explode(' :', $line, 2); |
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314 $parts = explode(' ', $partsa[0]); |
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315 $command = array_shift(&$parts); |
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316 if (count($partsa) > 1) array_push(&$parts, $partsa[1]); |
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317 $clientname = $client->name; |
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318 switch (strtoupper($command)) { |
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319 case 'NICK': //Nickname change: newnick = $parts[0] |
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320 if (find_nick($parts[0])) { |
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321 client_sendnumeric($client, 433, $parts[0].' :Nickname in use'); |
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322 } elseif (!preg_match('/^[a-zA-Z0-9\-_]+$/', $parts[0])) { |
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323 client_sendnumeric($client, 432, $parts[0].' :Erroneous nickname'); |
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324 } elseif ($client->name === NULL) { |
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325 $client->name = $parts[0]; |
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326 client_sendnumeric($client, 001, ':Welcome to the Internet Relay Chat Network'); |
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327 client_sendnumeric($client, 002, ':Your host is UDPMSG3-IRCD'); |
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328 client_sendnumeric($client, 003, ':This server was created some time ago'); |
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329 client_sendnumeric($client, 004, 'irc.udpmsg3.local 1.0 + +'); |
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330 client_sendnumeric($client, 005, 'NICKLEN=16 CHANNELLEN=16 CHANTYPES=# NETWORK=UDPMSG3 :are supported by this server'); |
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331 client_sendnumeric($client, 251, ':There are '.count($GLOBALS['clients']).' users and some invisible on a bunch of servers'); |
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332 client_sendnumeric($client, 252, '0 :operator(s) online'); |
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333 client_sendnumeric($client, 254, count($GLOBALS['channels']).' :channels formed'); |
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334 client_sendnumeric($client, 255, ':I have a bunch of clients and a bunch of servers'); |
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335 client_sendnumeric($client, 265, ':Current Local Users: undisclosed'); |
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336 client_sendnumeric($client, 266, ':Current Global Users: unknown'); |
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337 client_sendnumeric($client, 375, ':- server Message of the Day - '); |
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338 client_sendnumeric($client, 372, ':- No message, sorry.'); |
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339 client_sendnumeric($client, 376, ':End of /MOTD command.'); |
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340 } else { |
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341 $users = array($client); |
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342 foreach ($client->channels as $ch) foreach ($ch->users as $user) if (!in_array($user, $users)) $users[] = $user; |
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343 foreach ($users as $user) client_send($user, ':'.$client->name.' NICK :'.$parts[0]); |
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344 $client->name = $parts[0]; |
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345 } |
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346 break; |
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347 case 'USER': |
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348 case 'PASS': |
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349 break; |
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350 default: |
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351 if ($client->name === NULL) { |
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352 client_send($client, ':server 451 '.$command.' :You have not registered'); |
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353 break; |
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354 } |
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355 switch (strtoupper($command)) { |
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356 case 'PING': |
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357 client_send($client, 'PONG :'.$parts[0]); |
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358 break; |
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359 case 'PRIVMSG': |
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360 case 'NOTICE': |
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361 $channels = explode(',', $parts[0]); |
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362 foreach ($channels as $chn) { |
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363 if ($chn[0] == '#') { |
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364 if (!array_key_exists($chn, $client->channels)) { |
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365 client_sendnumeric($client, 404, $chn.' :Can not send to channel'); |
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366 } else { |
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367 channel_sendmsg($client->channels[$chn], $client, $parts[1]); |
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368 } |
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369 } else { |
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370 if ($ch = find_nick($chn)) { |
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371 client_send($ch, ':'.$client->name.' PRIVMSG '.$chn.' :'.$parts[1]); |
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372 } else { |
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373 client_sendnumeric($client, 401, $chn.' :No such nickname'); |
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374 } |
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375 } |
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376 } |
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377 break; |
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378 case 'JOIN': |
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379 $channels = explode(',', $parts[0]); |
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380 foreach ($channels as $chn) { |
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381 if (!preg_match('/^#[a-zA-Z0-9\-_]+$/', $chn)) { |
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382 client_sendnumeric($client, 403, $chn.' :No such channel'); |
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383 continue; |
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384 } |
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385 $ch = getchannel($chn); |
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386 if (!isset($client->channels[$chn])) { |
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387 $client->channels[$chn] = $ch; |
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388 $ch->users[] = $client; |
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389 print('JOIN '.$ch->name.': '.$client->name."\n"); |
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390 channel_send($ch, NULL, ':'.$client->name.'!user@host JOIN :'.$ch->name); |
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391 } |
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392 client_sendnames($ch, $client); |
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393 } |
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394 break; |
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395 case 'PART': |
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396 $channels = explode(',', $parts[0]); |
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397 foreach ($channels as $chn) { |
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398 if (!isset($client->channels[$chn])) continue; |
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399 $ch = $client->channels[$chn]; |
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400 print('PART '.$ch->name.': '.$client->name."\n"); |
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401 channel_send($ch, NULL, ':'.$client->name.' PART :'.$ch->name); |
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402 unset($client->channels[$chn]); |
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403 array_remove(&$ch->users, $client); |
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404 if (!count($ch->users) && !$ch->persistent) array_remove($GLOBALS['channels'], $ch); |
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405 } |
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406 break; |
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407 case 'QUIT': |
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408 client_close($client, isset($parts[0]) ? 'Quit: '.$parts[0] : 'Quit'); |
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409 break; |
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410 case 'NAMES': |
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411 $channels = explode(',', $parts[0]); |
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412 foreach ($channels as $chn) { |
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413 if (!isset($client->channels[$chn])) { |
|
|
414 client_sendnumeric($client, 403, $chn.' :No such channel'); |
|
|
415 } else { |
|
|
416 client_sendnames($client->channels[$chn], $client); |
|
|
417 } |
|
|
418 } |
|
|
419 break; |
|
|
420 case 'LIST': |
|
|
421 client_sendnumeric($client, 321, 'Channel :Users Name'); |
|
|
422 foreach ($GLOBALS['channels'] as $ch) { |
|
|
423 client_sendnumeric($client, 322, $ch->name.' '.count($ch->users).' :'); |
|
|
424 } |
|
|
425 client_sendnumeric($client, 323, 'End of /LIST'); |
|
|
426 break; |
|
|
427 case 'MODE': |
|
|
428 case 'USER': |
|
|
429 case 'USERHOST': |
|
|
430 break; |
|
|
431 default: |
|
|
432 client_sendnumeric($client, 421, $command.' :Unknown command'); |
|
|
433 } |
|
|
434 } |
|
|
435 return TRUE; |
|
|
436 } |
|
|
437 |
|
|
438 function client_sendnames($ch, $client) { |
|
|
439 $nicks = array(); |
|
|
440 foreach ($ch->users as $u) if ($u->name !== NULL) $nicks[] = $u->name; |
|
|
441 client_sendnumeric($client, 353, '= '.$ch->name.' :'.implode(' ', $nicks)); |
|
|
442 client_sendnumeric($client, 366, $ch->name.' :End of /NAMES list.'); |
|
|
443 } |
|
|
444 |
|
|
445 function client_sendnumeric($client, $num, $line) { |
|
|
446 client_send($client, ':server '.str_pad($num, 3, '0', STR_PAD_LEFT).' '.$client->name.' '.$line); |
|
|
447 } |
|
|
448 |
|
|
449 function client_send($client, $line) { |
|
|
450 print('W: '.$line."\n"); |
|
|
451 $line .= "\r\n"; |
|
|
452 socket_send($client->socket, $line, strlen($line), 0); |
|
|
453 } |
|
|
454 |
|
|
455 function channel_sendmsg($ch, $sender, $msg) { |
|
|
456 global $udpmsg_config; |
|
|
457 print('MESSAGE '.$ch->name.' <'.$sender->name.'> '.$msg."\n"); |
|
|
458 channel_send($ch, $sender, ':'.$sender->name.' PRIVMSG '.$ch->name.' :'.$msg); |
|
|
459 if (!$ch->udpmsg) return; |
|
|
460 $umsg = array('CMD' => 'MSG', 'CHN' => $ch->udpmsg, 'MSG' => $msg, 'USR' => $sender->name, 'DUMMY' => rand(10000, 99999)); |
|
|
461 if ($udpmsg_config['netname']) $umsg['NET'] = $udpmsg_config['netname']; |
|
|
462 udpmsg_send($umsg); |
|
|
463 } |
|
|
464 |
|
|
465 function channel_send($ch, $sender, $msg) { |
|
|
466 foreach ($ch->users as $client) { |
|
|
467 if ($client === $sender) continue; |
|
|
468 client_send($client, $msg); |
|
|
469 } |
|
|
470 } |
