1 | /* |
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2 | orxonox - the future of 3D-vertical-scrollers |
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3 | |
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4 | Copyright (C) 2004 orx |
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5 | |
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6 | This program is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | ### File Specific: |
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12 | main-programmer: claudio |
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13 | co-programmer: |
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14 | */ |
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15 | |
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16 | |
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17 | /* this is for debug output. It just says, that all calls to PRINT() belong to the DEBUG_MODULE_NETWORK module |
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18 | For more information refere to https://www.orxonox.net/cgi-bin/trac.cgi/wiki/DebugOutput |
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19 | */ |
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20 | #define DEBUG_MODULE_NETWORK |
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21 | |
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22 | |
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23 | #include "base_object.h" |
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24 | #include "network_protocol.h" |
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25 | #include "udp_socket.h" |
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26 | #include "udp_server_socket.h" |
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27 | #include "connection_monitor.h" |
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28 | #include "synchronizeable.h" |
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29 | #include "network_game_manager.h" |
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30 | #include "shared_network_data.h" |
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31 | #include "message_manager.h" |
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32 | |
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33 | #include "network_log.h" |
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34 | |
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35 | |
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36 | #include "lib/util/loading/factory.h" |
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37 | |
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38 | #include "debug.h" |
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39 | #include "class_list.h" |
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40 | #include <algorithm> |
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41 | |
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42 | /* include your own header */ |
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43 | #include "network_stream.h" |
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44 | |
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45 | /* probably unnecessary */ |
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46 | using namespace std; |
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47 | |
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48 | |
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49 | #define PACKAGE_SIZE 256 |
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50 | |
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51 | |
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52 | NetworkStream::NetworkStream() |
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53 | : DataStream() |
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54 | { |
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55 | this->init(); |
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56 | /* initialize the references */ |
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57 | this->type = NET_CLIENT; |
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58 | } |
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59 | |
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60 | |
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61 | NetworkStream::NetworkStream( std::string host, int port ) |
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62 | { |
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63 | this->type = NET_CLIENT; |
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64 | this->init(); |
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65 | this->peers[0].socket = new UdpSocket( host, port ); |
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66 | this->peers[0].userId = 0; |
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67 | this->peers[0].isServer = true; |
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68 | this->peers[0].connectionMonitor = new ConnectionMonitor( 0 ); |
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69 | } |
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70 | |
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71 | |
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72 | NetworkStream::NetworkStream( int port ) |
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73 | { |
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74 | this->type = NET_SERVER; |
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75 | this->init(); |
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76 | this->serverSocket = new UdpServerSocket(port); |
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77 | this->bActive = true; |
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78 | } |
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79 | |
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80 | |
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81 | void NetworkStream::init() |
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82 | { |
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83 | /* set the class id for the base object */ |
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84 | this->setClassID(CL_NETWORK_STREAM, "NetworkStream"); |
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85 | this->bActive = false; |
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86 | this->serverSocket = NULL; |
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87 | this->networkGameManager = NULL; |
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88 | myHostId = 0; |
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89 | currentState = 0; |
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90 | } |
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91 | |
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92 | |
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93 | NetworkStream::~NetworkStream() |
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94 | { |
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95 | if ( this->serverSocket ) |
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96 | { |
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97 | serverSocket->close(); |
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98 | delete serverSocket; |
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99 | } |
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100 | |
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101 | for ( PeerList::iterator i = peers.begin(); i!=peers.end(); i++) |
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102 | { |
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103 | if ( i->second.socket ) |
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104 | { |
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105 | i->second.socket->disconnectServer(); |
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106 | delete i->second.socket; |
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107 | i->second.socket = NULL; |
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108 | } |
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109 | |
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110 | if ( i->second.handshake ) |
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111 | { |
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112 | delete i->second.handshake; |
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113 | i->second.handshake = NULL; |
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114 | } |
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115 | } |
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116 | |
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117 | if ( serverSocket ) |
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118 | { |
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119 | delete serverSocket; |
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120 | serverSocket = NULL; |
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121 | } |
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122 | |
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123 | } |
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124 | |
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125 | |
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126 | void NetworkStream::createNetworkGameManager() |
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127 | { |
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128 | this->networkGameManager = NetworkGameManager::getInstance(); |
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129 | // setUniqueID( maxCon+2 ) because we need one id for every handshake |
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130 | // and one for handshake to reject client maxCon+1 |
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131 | this->networkGameManager->setUniqueID( SharedNetworkData::getInstance()->getNewUniqueID() ); |
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132 | MessageManager::getInstance()->setUniqueID( SharedNetworkData::getInstance()->getNewUniqueID() ); |
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133 | } |
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134 | |
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135 | |
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136 | void NetworkStream::startHandshake() |
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137 | { |
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138 | Handshake* hs = new Handshake(false); |
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139 | hs->setUniqueID( 0 ); |
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140 | assert( peers[0].handshake == NULL ); |
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141 | peers[0].handshake = hs; |
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142 | // peers[0].handshake->setSynchronized( true ); |
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143 | //this->connectSynchronizeable(*hs); |
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144 | //this->connectSynchronizeable(*hs); |
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145 | PRINTF(0)("NetworkStream: Handshake created: %s\n", hs->getName()); |
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146 | } |
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147 | |
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148 | |
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149 | void NetworkStream::connectSynchronizeable(Synchronizeable& sync) |
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150 | { |
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151 | this->synchronizeables.push_back(&sync); |
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152 | sync.setNetworkStream( this ); |
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153 | |
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154 | this->bActive = true; |
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155 | } |
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156 | |
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157 | |
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158 | void NetworkStream::disconnectSynchronizeable(Synchronizeable& sync) |
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159 | { |
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160 | // removing the Synchronizeable from the List. |
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161 | std::list<Synchronizeable*>::iterator disconnectSynchro = std::find(this->synchronizeables.begin(), this->synchronizeables.end(), &sync); |
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162 | if (disconnectSynchro != this->synchronizeables.end()) |
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163 | this->synchronizeables.erase(disconnectSynchro); |
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164 | |
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165 | oldSynchronizeables[sync.getUniqueID()] = SDL_GetTicks(); |
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166 | } |
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167 | |
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168 | |
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169 | void NetworkStream::processData() |
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170 | { |
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171 | currentState++; |
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172 | |
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173 | if ( this->type == NET_SERVER ) |
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174 | { |
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175 | if ( serverSocket ) |
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176 | serverSocket->update(); |
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177 | |
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178 | this->updateConnectionList(); |
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179 | } |
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180 | else |
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181 | { |
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182 | if ( peers[0].socket && !peers[0].socket->isOk() ) |
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183 | { |
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184 | PRINTF(1)("lost connection to server\n"); |
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185 | |
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186 | peers[0].socket->disconnectServer(); |
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187 | delete peers[0].socket; |
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188 | peers[0].socket = NULL; |
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189 | |
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190 | if ( peers[0].handshake ) |
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191 | delete peers[0].handshake; |
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192 | peers[0].handshake = NULL; |
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193 | } |
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194 | } |
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195 | |
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196 | cleanUpOldSyncList(); |
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197 | handleHandshakes(); |
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198 | handleUpstream(); |
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199 | handleDownstream(); |
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200 | |
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201 | } |
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202 | |
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203 | void NetworkStream::updateConnectionList( ) |
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204 | { |
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205 | //check for new connections |
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206 | |
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207 | NetworkSocket* tempNetworkSocket = serverSocket->getNewSocket(); |
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208 | |
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209 | if ( tempNetworkSocket ) |
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210 | { |
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211 | int clientId; |
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212 | if ( freeSocketSlots.size() >0 ) |
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213 | { |
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214 | clientId = freeSocketSlots.back(); |
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215 | freeSocketSlots.pop_back(); |
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216 | peers[clientId].socket = tempNetworkSocket; |
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217 | peers[clientId].handshake = new Handshake(true, clientId, this->networkGameManager->getUniqueID(), MessageManager::getInstance()->getUniqueID() ); |
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218 | peers[clientId].connectionMonitor = new ConnectionMonitor( clientId ); |
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219 | peers[clientId].handshake->setUniqueID(clientId); |
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220 | peers[clientId].userId = clientId; |
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221 | peers[clientId].isServer = false; |
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222 | } else |
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223 | { |
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224 | clientId = 1; |
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225 | |
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226 | for ( PeerList::iterator it = peers.begin(); it != peers.end(); it++ ) |
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227 | if ( it->first >= clientId ) |
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228 | clientId = it->first + 1; |
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229 | |
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230 | peers[clientId].socket = tempNetworkSocket; |
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231 | peers[clientId].handshake = new Handshake(true, clientId, this->networkGameManager->getUniqueID(), MessageManager::getInstance()->getUniqueID()); |
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232 | peers[clientId].handshake->setUniqueID(clientId); |
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233 | peers[clientId].connectionMonitor = new ConnectionMonitor( clientId ); |
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234 | peers[clientId].userId = clientId; |
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235 | peers[clientId].isServer = false; |
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236 | |
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237 | PRINTF(0)("num sync: %d\n", synchronizeables.size()); |
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238 | } |
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239 | |
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240 | if ( clientId > MAX_CONNECTIONS ) |
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241 | { |
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242 | peers[clientId].handshake->doReject( "too many connections" ); |
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243 | PRINTF(0)("Will reject client %d because there are to many connections!\n", clientId); |
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244 | } |
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245 | else |
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246 | |
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247 | PRINTF(0)("New Client: %d\n", clientId); |
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248 | |
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249 | //this->connectSynchronizeable(*handshakes[clientId]); |
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250 | } |
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251 | |
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252 | |
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253 | //check if connections are ok else remove them |
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254 | for ( PeerList::iterator it = peers.begin(); it != peers.end(); it++ ) |
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255 | { |
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256 | //TODO check for timeout |
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257 | if ( |
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258 | (it->second.socket && !it->second.socket->isOk() ) || |
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259 | it->second.connectionMonitor->hasTimedOut() |
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260 | ) |
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261 | { |
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262 | PRINTF(0)("Client is gone: %d\n", it->second.userId); |
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263 | |
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264 | it->second.socket->disconnectServer(); |
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265 | delete it->second.socket; |
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266 | it->second.socket = NULL; |
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267 | |
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268 | if ( it->second.handshake ) |
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269 | delete it->second.handshake; |
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270 | it->second.handshake = NULL; |
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271 | |
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272 | for ( SynchronizeableList::iterator it2 = synchronizeables.begin(); it2 != synchronizeables.end(); it2++ ) |
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273 | { |
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274 | (*it2)->cleanUpUser( it->second.userId ); |
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275 | } |
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276 | |
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277 | NetworkGameManager::getInstance()->signalLeftPlayer(it->second.userId); |
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278 | |
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279 | freeSocketSlots.push_back( it->second.userId ); |
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280 | |
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281 | } |
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282 | } |
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283 | |
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284 | |
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285 | } |
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286 | |
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287 | void NetworkStream::debug() |
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288 | { |
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289 | if( this->isServer()) |
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290 | PRINT(0)(" Host ist Server with ID: %i\n", this->myHostId); |
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291 | else |
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292 | PRINT(0)(" Host ist Client with ID: %i\n", this->myHostId); |
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293 | |
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294 | PRINT(0)(" Got %i connected Synchronizeables, showing active Syncs:\n", this->synchronizeables.size()); |
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295 | for (SynchronizeableList::iterator it = synchronizeables.begin(); it!=synchronizeables.end(); it++) |
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296 | { |
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297 | if( (*it)->beSynchronized() == true) |
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298 | PRINT(0)(" Synchronizeable of class: %s::%s, with unique ID: %i, Synchronize: %i\n", (*it)->getClassName(), (*it)->getName(), |
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299 | (*it)->getUniqueID(), (*it)->beSynchronized()); |
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300 | } |
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301 | PRINT(0)(" Maximal Connections: %i\n", MAX_CONNECTIONS ); |
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302 | |
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303 | } |
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304 | |
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305 | |
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306 | int NetworkStream::getSyncCount() |
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307 | { |
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308 | int n = 0; |
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309 | for (SynchronizeableList::iterator it = synchronizeables.begin(); it!=synchronizeables.end(); it++) |
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310 | if( (*it)->beSynchronized() == true) |
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311 | ++n; |
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312 | |
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313 | //return synchronizeables.size(); |
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314 | return n; |
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315 | } |
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316 | |
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317 | /** |
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318 | * check if handshakes completed |
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319 | */ |
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320 | void NetworkStream::handleHandshakes( ) |
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321 | { |
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322 | for ( PeerList::iterator it = peers.begin(); it != peers.end(); it++ ) |
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323 | { |
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324 | if ( it->second.handshake ) |
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325 | { |
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326 | if ( it->second.handshake->completed() ) |
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327 | { |
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328 | if ( it->second.handshake->ok() ) |
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329 | { |
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330 | if ( type != NET_SERVER ) |
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331 | { |
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332 | SharedNetworkData::getInstance()->setHostID( it->second.handshake->getHostId() ); |
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333 | myHostId = SharedNetworkData::getInstance()->getHostID(); |
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334 | |
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335 | this->networkGameManager = NetworkGameManager::getInstance(); |
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336 | this->networkGameManager->setUniqueID( it->second.handshake->getNetworkGameManagerId() ); |
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337 | MessageManager::getInstance()->setUniqueID( it->second.handshake->getMessageManagerId() ); |
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338 | |
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339 | |
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340 | } |
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341 | else |
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342 | handleNewClient( it->second.userId ); |
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343 | |
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344 | PRINT(0)("handshake finished id=%d\n", it->second.handshake->getNetworkGameManagerId()); |
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345 | |
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346 | delete it->second.handshake; |
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347 | it->second.handshake = NULL; |
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348 | |
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349 | } |
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350 | else |
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351 | { |
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352 | PRINT(1)("handshake failed!\n"); |
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353 | it->second.socket->disconnectServer(); |
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354 | } |
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355 | } |
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356 | } |
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357 | } |
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358 | } |
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359 | |
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360 | /** |
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361 | * handle upstream network traffic |
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362 | */ |
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363 | void NetworkStream::handleUpstream( ) |
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364 | { |
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365 | byte buf[UDP_PACKET_SIZE]; |
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366 | int offset; |
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367 | int n; |
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368 | |
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369 | for ( PeerList::iterator peer = peers.begin(); peer != peers.end(); peer++ ) |
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370 | { |
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371 | offset = INTSIZE; //make already space for length |
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372 | |
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373 | if ( !peer->second.socket ) |
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374 | continue; |
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375 | |
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376 | n = Converter::intToByteArray( currentState, buf + offset, UDP_PACKET_SIZE - offset ); |
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377 | assert( n == INTSIZE ); |
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378 | offset += n; |
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379 | |
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380 | n = Converter::intToByteArray( peer->second.lastAckedState, buf + offset, UDP_PACKET_SIZE - offset ); |
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381 | assert( n == INTSIZE ); |
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382 | offset += n; |
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383 | |
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384 | n = Converter::intToByteArray( peer->second.lastRecvedState, buf + offset, UDP_PACKET_SIZE - offset ); |
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385 | assert( n == INTSIZE ); |
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386 | offset += n; |
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387 | |
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388 | for ( SynchronizeableList::iterator it = synchronizeables.begin(); it != synchronizeables.end(); it++ ) |
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389 | { |
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390 | Synchronizeable & sync = **it; |
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391 | |
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392 | if ( !sync.beSynchronized() || sync.getUniqueID() < 0 ) |
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393 | continue; |
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394 | |
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395 | //if handshake not finished only sync handshake |
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396 | if ( peer->second.handshake && sync.getLeafClassID() != CL_HANDSHAKE ) |
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397 | continue; |
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398 | |
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399 | if ( isServer() && sync.getLeafClassID() == CL_HANDSHAKE && sync.getUniqueID() != peer->second.userId ) |
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400 | continue; |
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401 | |
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402 | //do not sync null parent |
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403 | if ( sync.getLeafClassID() == CL_NULL_PARENT ) |
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404 | continue; |
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405 | |
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406 | assert( offset + INTSIZE <= UDP_PACKET_SIZE ); |
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407 | |
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408 | //server fakes uniqueid=0 for handshake |
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409 | if ( this->isServer() && sync.getUniqueID() < MAX_CONNECTIONS - 1 ) |
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410 | n = Converter::intToByteArray( 0, buf + offset, UDP_PACKET_SIZE - offset ); |
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411 | else |
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412 | n = Converter::intToByteArray( sync.getUniqueID(), buf + offset, UDP_PACKET_SIZE - offset ); |
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413 | assert( n == INTSIZE ); |
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414 | offset += n; |
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415 | |
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416 | //make space for size |
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417 | offset += INTSIZE; |
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418 | |
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419 | n = sync.getStateDiff( peer->second.userId, buf + offset, UDP_PACKET_SIZE-offset, currentState, peer->second.lastAckedState, -1000 ); |
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420 | offset += n; |
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421 | |
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422 | assert( Converter::intToByteArray( n, buf + offset - n - INTSIZE, INTSIZE ) == INTSIZE ); |
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423 | } |
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424 | |
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425 | assert( Converter::intToByteArray( offset, buf, INTSIZE ) == INTSIZE ); |
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426 | |
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427 | assert( peer->second.socket->writePacket( buf, offset ) ); |
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428 | |
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429 | peer->second.connectionMonitor->processUnzippedOutgoingPacket( buf, offset, currentState ); |
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430 | |
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431 | NETPRINTF(n)("send packet: %d userId = %d\n", offset, peer->second.userId); |
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432 | } |
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433 | } |
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434 | |
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435 | /** |
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436 | * handle downstream network traffic |
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437 | */ |
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438 | void NetworkStream::handleDownstream( ) |
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439 | { |
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440 | byte buf[UDP_PACKET_SIZE]; |
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441 | int offset = 0; |
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442 | |
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443 | int length = 0; |
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444 | int packetLength = 0; |
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445 | int uniqueId = 0; |
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446 | int state = 0; |
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447 | int ackedState = 0; |
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448 | int fromState = 0; |
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449 | int syncDataLength = 0; |
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450 | |
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451 | for ( PeerList::iterator peer = peers.begin(); peer != peers.end(); peer++ ) |
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452 | { |
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453 | |
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454 | if ( !peer->second.socket ) |
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455 | continue; |
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456 | |
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457 | while ( 0 < (packetLength = peer->second.socket->readPacket( buf, UDP_PACKET_SIZE )) ) |
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458 | { |
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459 | |
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460 | if ( packetLength < 4*INTSIZE ) |
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461 | { |
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462 | if ( packetLength != 0 ) |
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463 | PRINTF(1)("got too small packet: %d\n", packetLength); |
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464 | continue; |
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465 | } |
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466 | |
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467 | assert( Converter::byteArrayToInt( buf, &length ) == INTSIZE ); |
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468 | assert( Converter::byteArrayToInt( buf + INTSIZE, &state ) == INTSIZE ); |
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469 | assert( Converter::byteArrayToInt( buf + 2*INTSIZE, &fromState ) == INTSIZE ); |
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470 | assert( Converter::byteArrayToInt( buf + 3*INTSIZE, &ackedState ) == INTSIZE ); |
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471 | NETPRINTF(n)("ackedstate: %d\n", ackedState); |
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472 | offset = 4*INTSIZE; |
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473 | |
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474 | NETPRINTF(n)("got packet: %d, %d\n", length, packetLength); |
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475 | |
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476 | //if this is an old state drop it |
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477 | if ( state <= peer->second.lastRecvedState ) |
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478 | continue; |
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479 | |
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480 | if ( packetLength != length ) |
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481 | { |
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482 | PRINTF(1)("real packet length (%d) and transmitted packet length (%d) do not match!\n", packetLength, length); |
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483 | peer->second.socket->disconnectServer(); |
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484 | continue; |
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485 | } |
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486 | |
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487 | while ( offset < length ) |
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488 | { |
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489 | assert( Converter::byteArrayToInt( buf + offset, &uniqueId ) == INTSIZE ); |
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490 | offset += INTSIZE; |
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491 | |
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492 | assert( Converter::byteArrayToInt( buf + offset, &syncDataLength ) == INTSIZE ); |
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493 | offset += INTSIZE; |
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494 | |
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495 | Synchronizeable * sync = NULL; |
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496 | |
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497 | for ( SynchronizeableList::iterator it = synchronizeables.begin(); it != synchronizeables.end(); it++ ) |
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498 | { |
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499 | // client thinks his handshake has id 0!!!!! |
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500 | if ( (*it)->getUniqueID() == uniqueId || ( uniqueId == 0 && (*it)->getUniqueID() == peer->second.userId ) ) |
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501 | { |
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502 | sync = *it; |
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503 | break; |
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504 | } |
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505 | } |
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506 | |
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507 | if ( sync == NULL ) |
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508 | { |
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509 | if ( oldSynchronizeables.find( uniqueId ) != oldSynchronizeables.end() ) |
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510 | { |
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511 | offset += syncDataLength; |
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512 | continue; |
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513 | } |
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514 | |
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515 | if ( !peers[peer->second.userId].isServer ) |
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516 | { |
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517 | offset += syncDataLength; |
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518 | continue; |
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519 | } |
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520 | |
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521 | int leafClassId; |
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522 | if ( INTSIZE > length - offset ) |
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523 | { |
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524 | offset += syncDataLength; |
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525 | continue; |
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526 | } |
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527 | |
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528 | Converter::byteArrayToInt( buf + offset, &leafClassId ); |
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529 | |
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530 | BaseObject * b; |
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531 | /* These are some small exeptions in creation: Not all objects can/should be created via Factory */ |
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532 | /* Exception 1: NullParent */ |
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533 | if( leafClassId == CL_NULL_PARENT || leafClassId == CL_SYNCHRONIZEABLE ) |
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534 | { |
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535 | PRINTF(1)("Can not create Class with ID %x!\n", (int)leafClassId); |
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536 | offset += syncDataLength; |
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537 | continue; |
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538 | } |
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539 | else |
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540 | b = Factory::fabricate( (ClassID)leafClassId ); |
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541 | |
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542 | if ( !b ) |
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543 | { |
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544 | PRINTF(1)("Could not fabricate Object with classID %x\n", leafClassId); |
---|
545 | offset += syncDataLength; |
---|
546 | continue; |
---|
547 | } |
---|
548 | |
---|
549 | if ( b->isA(CL_SYNCHRONIZEABLE) ) |
---|
550 | { |
---|
551 | sync = dynamic_cast<Synchronizeable*>(b); |
---|
552 | sync->setUniqueID( uniqueId ); |
---|
553 | sync->setSynchronized(true); |
---|
554 | |
---|
555 | PRINTF(0)("Fabricated %s with id %d\n", sync->getClassName(), sync->getUniqueID()); |
---|
556 | } |
---|
557 | else |
---|
558 | { |
---|
559 | PRINTF(1)("Class with ID %x is not a synchronizeable!\n", (int)leafClassId); |
---|
560 | delete b; |
---|
561 | offset += syncDataLength; |
---|
562 | continue; |
---|
563 | } |
---|
564 | } |
---|
565 | |
---|
566 | offset += sync->setStateDiff( peer->second.userId, buf+offset, syncDataLength, state, fromState ); |
---|
567 | } |
---|
568 | |
---|
569 | if ( offset != length ) |
---|
570 | { |
---|
571 | PRINTF(0)("offset (%d) != length (%d)\n", offset, length); |
---|
572 | peer->second.socket->disconnectServer(); |
---|
573 | } |
---|
574 | |
---|
575 | peer->second.connectionMonitor->processUnzippedIncomingPacket( buf, offset, currentState, ackedState ); |
---|
576 | |
---|
577 | peer->second.lastAckedState = ackedState; |
---|
578 | peer->second.lastRecvedState = state; |
---|
579 | |
---|
580 | } |
---|
581 | |
---|
582 | } |
---|
583 | |
---|
584 | } |
---|
585 | |
---|
586 | /** |
---|
587 | * is executed when a handshake has finished |
---|
588 | * @todo create playable for new user |
---|
589 | */ |
---|
590 | void NetworkStream::handleNewClient( int userId ) |
---|
591 | { |
---|
592 | MessageManager::getInstance()->initUser( userId ); |
---|
593 | |
---|
594 | networkGameManager->signalNewPlayer( userId ); |
---|
595 | } |
---|
596 | |
---|
597 | /** |
---|
598 | * removes old items from oldSynchronizeables |
---|
599 | */ |
---|
600 | void NetworkStream::cleanUpOldSyncList( ) |
---|
601 | { |
---|
602 | //TODO dont return do something |
---|
603 | return; |
---|
604 | int now = SDL_GetTicks(); |
---|
605 | |
---|
606 | for ( std::map<int,int>::iterator it = oldSynchronizeables.begin(); it != oldSynchronizeables.end(); ) |
---|
607 | { |
---|
608 | if ( it->second < now - 10*1000 ) |
---|
609 | { |
---|
610 | std::map<int,int>::iterator delIt = it; |
---|
611 | it++; |
---|
612 | oldSynchronizeables.erase( delIt ); |
---|
613 | continue; |
---|
614 | } |
---|
615 | it++; |
---|
616 | } |
---|
617 | } |
---|
618 | |
---|
619 | |
---|
620 | |
---|
621 | |
---|
622 | |
---|
623 | |
---|