1 | /* |
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2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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3 | * > www.orxonox.net < |
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4 | * |
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5 | * |
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6 | * License notice: |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU General Public License |
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10 | * as published by the Free Software Foundation; either version 2 |
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11 | * of the License, or (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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21 | * |
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22 | * Author: |
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23 | * Oliver Scheuss, (C) 2007 |
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24 | * Co-authors: |
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25 | * ... |
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26 | * |
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27 | */ |
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28 | |
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29 | // |
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30 | // C++ Interface: ClientConnection |
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31 | // |
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32 | // Description: The Class ClientConnection manages the servers conenctions to the clients. |
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33 | // each connection is provided by a new process. communication between master process and |
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34 | // connection processes is provided by ... |
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35 | // |
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36 | // |
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37 | // Author: Oliver Scheuss |
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38 | // |
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39 | |
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40 | #include "ClientConnection.h" |
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41 | |
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42 | #include <iostream> |
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43 | // boost.thread library for multithreading support |
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44 | #include <boost/thread/thread.hpp> |
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45 | #include <boost/bind.hpp> |
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46 | |
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47 | #include "util/Sleep.h" |
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48 | #include "util/Debug.h" |
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49 | |
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50 | namespace network |
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51 | { |
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52 | //static boost::thread_group network_threads; |
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53 | |
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54 | boost::recursive_mutex ClientConnection::enet_mutex_; |
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55 | |
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56 | ClientConnection::ClientConnection(int port, std::string address) { |
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57 | quit=false; |
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58 | server=NULL; |
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59 | enet_address_set_host(&serverAddress, address.c_str()); |
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60 | serverAddress.port = port; |
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61 | established=false; |
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62 | } |
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63 | |
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64 | ClientConnection::ClientConnection(int port, const char *address) { |
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65 | quit=false; |
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66 | server=NULL; |
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67 | enet_address_set_host(&serverAddress, address); |
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68 | serverAddress.port = port; |
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69 | established=false; |
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70 | } |
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71 | |
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72 | bool ClientConnection::waitEstablished(int milisec) { |
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73 | for(int i=0; i<=milisec && !established; i++) |
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74 | usleep(1000); |
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75 | |
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76 | return established; |
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77 | } |
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78 | |
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79 | |
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80 | /*ENetPacket *ClientConnection::getPacket(ENetAddress &address) { |
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81 | if(!buffer.isEmpty()) { |
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82 | //std::cout << "###BUFFER IS NOT EMPTY###" << std::endl; |
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83 | return buffer.pop(address); |
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84 | } |
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85 | else{ |
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86 | return NULL; |
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87 | } |
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88 | } |
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89 | |
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90 | ENetPacket *ClientConnection::getPacket() { |
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91 | ENetAddress address; //sems that address is not needed |
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92 | return getPacket(address); |
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93 | }*/ |
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94 | |
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95 | ENetEvent *ClientConnection::getEvent(){ |
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96 | if(!buffer.isEmpty()) |
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97 | return buffer.pop(); |
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98 | else |
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99 | return NULL; |
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100 | } |
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101 | |
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102 | bool ClientConnection::queueEmpty() { |
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103 | return buffer.isEmpty(); |
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104 | } |
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105 | |
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106 | bool ClientConnection::createConnection() { |
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107 | receiverThread_ = new boost::thread(boost::bind(&ClientConnection::receiverThread, this)); |
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108 | //network_threads.create_thread(boost::bind(boost::mem_fn(&ClientConnection::receiverThread), this)); |
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109 | // wait 10 seconds for the connection to be established |
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110 | return waitEstablished(NETWORK_CLIENT_CONNECT_TIMEOUT); |
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111 | } |
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112 | |
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113 | bool ClientConnection::closeConnection() { |
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114 | quit=true; |
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115 | //network_threads.join_all(); |
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116 | receiverThread_->join(); |
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117 | established=false; |
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118 | return true; |
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119 | } |
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120 | |
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121 | |
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122 | bool ClientConnection::addPacket(ENetPacket *packet) { |
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123 | if(server==NULL) |
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124 | return false; |
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125 | if(packet==NULL){ |
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126 | COUT(3) << "Cl.con: addpacket: invalid packet" << std::endl; |
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127 | return false; |
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128 | } |
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129 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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130 | if(enet_peer_send(server, 0, packet)<0) |
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131 | return false; |
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132 | else |
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133 | return true; |
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134 | } |
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135 | |
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136 | bool ClientConnection::sendPackets() { |
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137 | if(server==NULL) |
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138 | return false; |
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139 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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140 | enet_host_flush(client); |
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141 | lock.unlock(); |
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142 | return true; |
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143 | } |
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144 | |
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145 | void ClientConnection::receiverThread() { |
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146 | // what about some error-handling here ? |
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147 | atexit(enet_deinitialize); |
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148 | ENetEvent *event; |
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149 | { |
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150 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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151 | enet_initialize(); |
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152 | client = enet_host_create(NULL, NETWORK_CLIENT_MAX_CONNECTIONS, 0, 0); |
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153 | lock.unlock(); |
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154 | } |
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155 | if(client==NULL) { |
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156 | COUT(2) << "ClientConnection: could not create client host" << std::endl; |
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157 | // add some error handling here ========================== |
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158 | quit=true; |
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159 | } |
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160 | //connect to the server |
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161 | if(!establishConnection()){ |
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162 | COUT(2) << "clientConn: receiver thread: could not establishConnection" << std::endl; |
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163 | quit=true; |
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164 | return; |
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165 | } |
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166 | event = new ENetEvent; |
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167 | //main loop |
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168 | while(!quit){ |
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169 | //std::cout << "connection loop" << std::endl; |
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170 | { |
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171 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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172 | if(enet_host_service(client, event, NETWORK_CLIENT_WAIT_TIME)<0){ |
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173 | // we should never reach this point |
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174 | quit=true; |
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175 | continue; |
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176 | // add some error handling here ======================== |
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177 | } |
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178 | lock.unlock(); |
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179 | } |
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180 | switch(event->type){ |
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181 | // log handling ================ |
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182 | case ENET_EVENT_TYPE_CONNECT: |
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183 | break; |
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184 | case ENET_EVENT_TYPE_RECEIVE: |
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185 | COUT(5) << "Cl.Con: receiver-Thread while loop: got new packet" << std::endl; |
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186 | if ( !processData(event) ) COUT(2) << "Current packet was not pushed to packetBuffer -> ev ongoing SegFault" << std::endl; |
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187 | COUT(5) << "Cl.Con: processed Data in receiver-thread while loop" << std::endl; |
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188 | event = new ENetEvent; |
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189 | break; |
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190 | case ENET_EVENT_TYPE_DISCONNECT: |
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191 | quit=true; |
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192 | // server closed the connection |
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193 | return; |
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194 | break; |
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195 | case ENET_EVENT_TYPE_NONE: |
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196 | //receiverThread_->yield(); |
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197 | usleep(1000); |
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198 | break; |
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199 | } |
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200 | } |
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201 | // now disconnect |
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202 | |
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203 | if(!disconnectConnection()) |
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204 | // if disconnecting failed destroy conn. |
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205 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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206 | enet_peer_reset(server); |
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207 | return; |
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208 | } |
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209 | |
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210 | bool ClientConnection::disconnectConnection() { |
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211 | ENetEvent event; |
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212 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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213 | enet_peer_disconnect(server, 0); |
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214 | while(enet_host_service(client, &event, NETWORK_CLIENT_WAIT_TIME) > 0){ |
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215 | switch (event.type) |
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216 | { |
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217 | case ENET_EVENT_TYPE_NONE: |
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218 | case ENET_EVENT_TYPE_CONNECT: |
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219 | case ENET_EVENT_TYPE_RECEIVE: |
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220 | enet_packet_destroy(event.packet); |
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221 | break; |
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222 | case ENET_EVENT_TYPE_DISCONNECT: |
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223 | return true; |
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224 | } |
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225 | } |
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226 | enet_peer_reset(server); |
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227 | return false; |
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228 | } |
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229 | |
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230 | bool ClientConnection::establishConnection() { |
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231 | ENetEvent event; |
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232 | // connect to peer (server is type ENetPeer*) |
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233 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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234 | server = enet_host_connect(client, &serverAddress, NETWORK_CLIENT_CHANNELS); |
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235 | if(server==NULL) { |
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236 | COUT(2) << "ClientConnection: server == NULL" << std::endl; |
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237 | // error handling |
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238 | return false; |
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239 | } |
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240 | // handshake |
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241 | while(enet_host_service(client, &event, NETWORK_CLIENT_WAIT_TIME)>=0 && !quit){ |
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242 | if( event.type == ENET_EVENT_TYPE_CONNECT ){ |
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243 | established=true; |
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244 | return true; |
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245 | } |
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246 | } |
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247 | COUT(2) << "ClientConnection: enet_host_service < 0 or event.type != ENET_EVENT_TYPE_CONNECT # EVENT:" << event.type << std::endl; |
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248 | return false; |
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249 | } |
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250 | |
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251 | bool ClientConnection::processData(ENetEvent *event) { |
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252 | COUT(5) << "Cl.Con: got packet, pushing to queue" << std::endl; |
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253 | // just add packet to the buffer |
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254 | // this can be extended with some preprocessing |
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255 | return buffer.push(event); |
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256 | } |
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257 | |
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258 | } |
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