[5542] | 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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[5592] | 12 | main-programmer: Christoph Renner, David Hasenfratz |
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| 13 | co-programmer: |
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[5542] | 14 | */ |
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| 15 | |
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| 16 | |
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[5605] | 17 | |
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[5542] | 18 | /* this is for debug output. It just says, that all calls to PRINT() belong to the DEBUG_MODULE_NETWORK module |
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| 19 | For more information refere to https://www.orxonox.net/cgi-bin/trac.cgi/wiki/DebugOutput |
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| 20 | */ |
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| 21 | #define DEBUG_MODULE_NETWORK |
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| 22 | |
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[6341] | 23 | #include "converter.h" |
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[5542] | 24 | |
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| 25 | /* include your own header */ |
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| 26 | #include "network_socket.h" |
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| 27 | |
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[5565] | 28 | /* header for debug output */ |
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| 29 | #include "debug.h" |
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[5542] | 30 | |
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| 31 | /** |
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| 32 | * Default constructor |
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| 33 | */ |
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| 34 | NetworkSocket::NetworkSocket() |
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[5565] | 35 | { |
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[5808] | 36 | this->init(); |
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| 37 | } |
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| 38 | |
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| 39 | /** |
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| 40 | * Constructor to connect directly |
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| 41 | */ |
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| 42 | NetworkSocket::NetworkSocket(IPaddress ip) |
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| 43 | { |
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| 44 | this->init(); |
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| 45 | connectToServer(ip); |
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| 46 | } |
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| 47 | |
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| 48 | |
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[5996] | 49 | NetworkSocket::NetworkSocket( TCPsocket sock ) |
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| 50 | { |
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| 51 | this->init(); |
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| 52 | this->tcpSocket = sock; |
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| 53 | |
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[6139] | 54 | readThread = SDL_CreateThread(thread_read, (void*)this); |
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| 55 | writeThread = SDL_CreateThread(thread_write, (void*)this); |
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[5996] | 56 | } |
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| 57 | |
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[5808] | 58 | void NetworkSocket::init() |
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| 59 | { |
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[5592] | 60 | /* set the class id for the base object */ |
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| 61 | this->setClassID(CL_NETWORK_SOCKET, "NetworkSocket"); |
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[5542] | 62 | |
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[5624] | 63 | tcpSocket = NULL; |
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[5630] | 64 | incomingBufferLength = 0; |
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| 65 | outgoingBufferLength = 0; |
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[5624] | 66 | |
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[6139] | 67 | readThread = NULL; |
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| 68 | writeThread = NULL; |
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| 69 | |
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| 70 | |
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| 71 | thread_write_running = false; |
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| 72 | thread_read_running = false; |
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| 73 | |
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[5630] | 74 | incomingBufferMutex = SDL_CreateMutex(); |
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| 75 | outgoingBufferMutex = SDL_CreateMutex(); |
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[6139] | 76 | |
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| 77 | |
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[5630] | 78 | socketMutex = SDL_CreateMutex(); |
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[5624] | 79 | terminateThread = false; |
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| 80 | |
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[5592] | 81 | /* Init SDL_net */ |
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[5624] | 82 | //NOTE: do we need to call SDLNet_Init for all instances? |
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[5592] | 83 | if(SDLNet_Init()==-1) |
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| 84 | { |
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| 85 | PRINTF(1)("SDLNet_Init: %s\n", SDLNet_GetError()); |
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[5565] | 86 | return; |
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[5592] | 87 | } |
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| 88 | else |
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| 89 | PRINTF(5)("SDL_net initialized\n"); |
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[5565] | 90 | |
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[5606] | 91 | PRINTF(0)("NetworkSocket created\n"); |
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| 92 | |
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[5565] | 93 | } |
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| 94 | |
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[5996] | 95 | |
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| 96 | |
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[5542] | 97 | /** |
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| 98 | * Default destructor |
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| 99 | */ |
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[6139] | 100 | NetworkSocket::~NetworkSocket( ) |
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[5542] | 101 | { |
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[6139] | 102 | this->terminateThread = true; |
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[5592] | 103 | /* Quit SDL_net */ |
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[5624] | 104 | // NOTE: what if other instances of NetworkSocket running? |
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[5592] | 105 | SDLNet_Quit(); |
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| 106 | PRINTF(5)("SDL_net shutdown\n"); |
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[5625] | 107 | |
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[5630] | 108 | SDL_DestroyMutex(incomingBufferMutex); |
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| 109 | SDL_DestroyMutex(outgoingBufferMutex); |
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| 110 | SDL_DestroyMutex(socketMutex); |
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[6139] | 111 | SDL_DestroyMutex(threadTerminationMutex); |
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[5542] | 112 | } |
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| 113 | |
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| 114 | /** |
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[5624] | 115 | * This function establishes a TCP/UDP connection to a given server (function argument). |
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| 116 | * It is called by the NetworkStream. It creates a TCP/UDP socket for the connection. |
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| 117 | * @param ip |
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| 118 | */ |
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[5804] | 119 | void NetworkSocket::connectToServer(IPaddress ip) |
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[5542] | 120 | { |
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[5624] | 121 | //check if not already connected or listening |
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| 122 | if (tcpSocket) |
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| 123 | { |
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| 124 | PRINTF(1)("NetworkSocket::listen: tcpSocket!=NULL! maybe you already called listen or connectToServer or did not call disconnectServer()!"); |
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| 125 | } |
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[5577] | 126 | |
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[5592] | 127 | /* Connect to the host and port contained in ip using a TCP connection. */ |
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| 128 | tcpSocket = SDLNet_TCP_Open(&ip); |
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| 129 | if(!tcpSocket) |
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| 130 | { |
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[5577] | 131 | PRINTF(1)("SDLNet_TCP_Open: %s\n", SDLNet_GetError()); |
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| 132 | return; |
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[5592] | 133 | } |
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[5577] | 134 | |
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[6139] | 135 | readThread = SDL_CreateThread(thread_read, (void*)this); |
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| 136 | writeThread = SDL_CreateThread(thread_write, (void*)this); |
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[5542] | 137 | } |
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| 138 | |
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[5624] | 139 | |
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[5542] | 140 | /** |
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[5565] | 141 | * DTears down a TCP/UDP connection. |
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[5542] | 142 | */ |
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| 143 | void NetworkSocket::disconnectServer( ) |
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| 144 | { |
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[5624] | 145 | terminateThread = true; |
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[5592] | 146 | /* Close the connection */ |
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[5625] | 147 | |
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[5630] | 148 | SDL_mutexP(socketMutex); |
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[5592] | 149 | SDLNet_TCP_Close(tcpSocket); |
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[5624] | 150 | tcpSocket = NULL; |
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[5630] | 151 | SDL_mutexV(socketMutex); |
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[5542] | 152 | } |
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| 153 | |
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[5624] | 154 | |
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[5542] | 155 | /** |
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[5624] | 156 | * This function writes some bytes (data) to the network connection (if the connection is already |
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| 157 | * estabilhed) otherwise it just does nothing (silently discarding the data). And writes some |
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| 158 | * warnings |
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| 159 | * @param data: pointer to the data to send |
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| 160 | * @param length: n bytes to send |
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| 161 | * @return the number successfully written bytes |
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| 162 | */ |
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| 163 | int NetworkSocket::writeBytes(byte * data, int length) |
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[5542] | 164 | { |
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[6139] | 165 | PRINTF(5)("NetworkSocket::writeBytes()\n"); |
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[5630] | 166 | #ifdef _USE_OUTGOING_BUFFER |
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[5625] | 167 | |
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[5630] | 168 | #define min(a,b) (a<b)?a:b |
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| 169 | int nbytes = min(_OUTGOING_BUFFER_SIZE - outgoingBufferLength, length); |
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| 170 | #undef min |
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| 171 | |
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| 172 | if (!tcpSocket || data==NULL || nbytes<=0) |
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| 173 | return 0; |
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| 174 | |
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| 175 | SDL_mutexP(outgoingBufferMutex); |
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| 176 | |
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| 177 | memcpy(outgoingBuffer + outgoingBufferLength, data, nbytes); |
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| 178 | outgoingBufferLength += nbytes; |
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[5804] | 179 | |
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[5630] | 180 | SDL_mutexV(outgoingBufferMutex); |
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| 181 | |
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[5805] | 182 | |
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[5630] | 183 | return nbytes; |
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| 184 | #else |
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| 185 | SDL_mutexP(socketMutex); |
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| 186 | |
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[5624] | 187 | if (!tcpSocket || data==NULL) |
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| 188 | return 0; |
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| 189 | |
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| 190 | int res = SDLNet_TCP_Send(tcpSocket, data, length); |
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| 191 | |
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[5630] | 192 | SDL_mutexV(socketMutex); |
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[5625] | 193 | |
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[5624] | 194 | if (res<length) |
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| 195 | PRINTF(1)("SDLNet_TCP_Send: %s\n", SDLNet_GetError()); |
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[5628] | 196 | |
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| 197 | return res; |
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[5630] | 198 | #endif |
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[5542] | 199 | } |
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| 200 | |
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[5624] | 201 | /** |
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| 202 | * Reads in the bytes from the network interface and passes it to the NetworkStream. |
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| 203 | * This function must internaly be implemented/connected as a thread, since the read |
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| 204 | * functions of many network libraries are blocking an would therefore block the whole |
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| 205 | * program. |
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| 206 | * From outside, the thread shouldn't be accessible at all. |
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| 207 | * @param data: pointer to memory, big enough to store length bytes |
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| 208 | * @param length: n bytes to read |
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| 209 | * @return the number successfully read bytes. -1 on error. may be less than length! |
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| 210 | */ |
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[5614] | 211 | int NetworkSocket::readBytes(byte * data, int length) |
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[5542] | 212 | { |
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[6139] | 213 | PRINTF(5)("NetworkSocket::readBytes()\n"); |
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[5625] | 214 | if (data==NULL) |
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[5624] | 215 | return 0; |
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| 216 | |
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[5630] | 217 | int nbytes = (length<incomingBufferLength) ? length : incomingBufferLength; |
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[5624] | 218 | |
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[5808] | 219 | |
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[5630] | 220 | //printf("readBytes: nbytes = %d; length=%d; incomingBufferLength=%d\n", nbytes, length, incomingBufferLength); |
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| 221 | |
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[5624] | 222 | // just in case ... |
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| 223 | if (nbytes<0) |
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| 224 | return -1; |
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| 225 | |
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| 226 | if (nbytes==0) |
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| 227 | return 0; |
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| 228 | |
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[5630] | 229 | SDL_mutexP(incomingBufferMutex); |
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[5624] | 230 | |
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[5630] | 231 | memcpy(data, incomingBuffer, nbytes); |
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[5624] | 232 | |
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| 233 | //important: use memmove because the memory areas may overlap |
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[5630] | 234 | memmove(incomingBuffer, incomingBuffer+nbytes, incomingBufferLength-nbytes); |
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| 235 | incomingBufferLength -= nbytes; |
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[5624] | 236 | |
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[5630] | 237 | SDL_mutexV(incomingBufferMutex); |
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[5624] | 238 | |
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| 239 | return nbytes; |
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[5542] | 240 | } |
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[5624] | 241 | |
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| 242 | /** |
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[5725] | 243 | * Reads in the bytes form the network interface and passes it to the NetworkStream. |
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| 244 | * It only reads the bytes if there are enough bytes in our buffer. |
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| 245 | * @param data: pointer to memory, big enough to store length bytes |
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| 246 | * @param length: n bytes to read |
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| 247 | * @return the number successfully read bytes. -1 on error. 0 if there are not enough bytes in our buffer. |
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| 248 | */ |
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[5729] | 249 | int NetworkSocket::readBlock(byte * data, int length) |
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[5725] | 250 | { |
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[5804] | 251 | printf("NetworkSocket: got %i bytes, NetworkStream requested %i bytes\n", this->incomingBufferLength, length); |
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[5725] | 252 | if (incomingBufferLength >= length) |
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| 253 | return readBytes(data, length); |
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| 254 | else return 0; |
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| 255 | } |
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| 256 | |
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[5624] | 257 | |
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| 258 | /** |
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| 259 | * used to create a thread to read from socket |
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| 260 | * @param data: pointer to NetworkSocket |
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| 261 | */ |
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| 262 | int NetworkSocket::thread_read( void * data ) |
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| 263 | { |
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| 264 | int nbytesread = 0; |
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| 265 | int nbytestoread = 0; |
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| 266 | char buffer[_LOCAL_BUFFER_SIZE]; |
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| 267 | NetworkSocket * self = (NetworkSocket*)data; |
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| 268 | |
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[6139] | 269 | self->thread_read_running = true; |
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| 270 | |
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[5624] | 271 | while (!self->terminateThread) |
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| 272 | { |
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| 273 | #define min(a,b) (a<b)?a:b |
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[5630] | 274 | nbytestoread = min(_INCOMING_BUFFER_SIZE - self->incomingBufferLength, _LOCAL_BUFFER_SIZE); |
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| 275 | #undef min |
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[5624] | 276 | |
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[5628] | 277 | //if buffer is full |
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[6139] | 278 | if (nbytestoread<=0 || !self->tcpSocket) |
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[5628] | 279 | { |
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| 280 | SDL_Delay(_MSECONDS_SLEEP_FULL_BUFFER); |
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| 281 | continue; |
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| 282 | } |
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| 283 | |
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[5624] | 284 | nbytesread = SDLNet_TCP_Recv(self->tcpSocket, buffer, nbytestoread); |
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| 285 | |
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[5630] | 286 | SDL_mutexP(self->incomingBufferMutex); |
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[5624] | 287 | |
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| 288 | if (nbytesread<=0) |
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| 289 | { |
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[6139] | 290 | if (nbytesread<0) |
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| 291 | printf("SDLNet_TCP_Recv: %s\n", SDLNet_GetError()); |
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[5625] | 292 | |
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[5630] | 293 | SDL_mutexP(self->socketMutex); |
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[5625] | 294 | |
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[5624] | 295 | SDLNet_TCP_Close(self->tcpSocket); |
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| 296 | self->tcpSocket = NULL; |
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[5625] | 297 | |
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[5630] | 298 | SDL_mutexV(self->socketMutex); |
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| 299 | SDL_mutexV(self->incomingBufferMutex); |
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[6139] | 300 | continue; |
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[5624] | 301 | } |
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| 302 | |
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[5630] | 303 | //printf("thread_read: nbytesread=%d\n", nbytesread); |
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[5624] | 304 | |
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[5630] | 305 | memcpy(self->incomingBuffer+self->incomingBufferLength, buffer, nbytesread); |
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| 306 | self->incomingBufferLength += nbytesread; |
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| 307 | |
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| 308 | SDL_mutexV(self->incomingBufferMutex); |
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[5624] | 309 | } |
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| 310 | |
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[6139] | 311 | SDL_mutexP(self->threadTerminationMutex); |
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| 312 | self->thread_read_running = false; |
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| 313 | |
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| 314 | if ( !self->thread_write_running ) |
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| 315 | { |
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| 316 | //delete self; |
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| 317 | SDL_mutexV(self->threadTerminationMutex); |
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| 318 | } |
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| 319 | else |
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| 320 | { |
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| 321 | SDL_mutexV(self->threadTerminationMutex); |
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| 322 | } |
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| 323 | |
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| 324 | |
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| 325 | PRINTF(0)("QUIT READ THREAD\n"); |
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[5624] | 326 | return 0; |
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| 327 | } |
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| 328 | |
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[5630] | 329 | int NetworkSocket::thread_write( void * data ) |
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| 330 | { |
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| 331 | int nbyteswrite = 0; |
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| 332 | int nbytestowrite = 0; |
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| 333 | char buffer[_LOCAL_BUFFER_SIZE]; |
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| 334 | NetworkSocket * self = (NetworkSocket*)data; |
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[5624] | 335 | |
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[6139] | 336 | self->thread_write_running = true; |
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| 337 | |
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[5630] | 338 | while (!self->terminateThread) |
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| 339 | { |
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| 340 | #define min(a,b) (a<b)?a:b |
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| 341 | nbytestowrite = min(self->outgoingBufferLength, _LOCAL_BUFFER_SIZE); |
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| 342 | #undef min |
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[5628] | 343 | |
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[5805] | 344 | // printf("thread_write nbytes=%d listening=%d\n", nbytestowrite, (int)self->_isListening); |
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[5630] | 345 | |
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| 346 | //if buffer is full |
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[6139] | 347 | if (nbytestowrite<=0 || !self->tcpSocket) |
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[5630] | 348 | { |
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| 349 | SDL_Delay(_MSECONDS_SLEEP_EMPTY_BUFFER); |
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| 350 | continue; |
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| 351 | } |
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| 352 | |
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| 353 | SDL_mutexP(self->outgoingBufferMutex); |
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| 354 | |
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| 355 | //printf("a\n"); |
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| 356 | |
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| 357 | memcpy(buffer, self->outgoingBuffer, nbytestowrite); |
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| 358 | self->outgoingBufferLength -= nbytestowrite; |
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| 359 | memmove(self->outgoingBuffer, self->outgoingBuffer+nbytestowrite, self->outgoingBufferLength); |
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| 360 | |
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| 361 | SDL_mutexV(self->outgoingBufferMutex); |
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| 362 | |
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| 363 | nbyteswrite = SDLNet_TCP_Send(self->tcpSocket, buffer, nbytestowrite); |
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| 364 | |
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| 365 | if (nbyteswrite<=0) |
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| 366 | { |
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[5737] | 367 | printf("SDLNet_TCP_Recv: %s\n", SDLNet_GetError()); |
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[5630] | 368 | |
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| 369 | SDL_mutexP(self->socketMutex); |
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| 370 | |
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| 371 | SDLNet_TCP_Close(self->tcpSocket); |
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| 372 | self->tcpSocket = NULL; |
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| 373 | |
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| 374 | SDL_mutexV(self->socketMutex); |
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[6139] | 375 | continue; |
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[5630] | 376 | } |
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| 377 | |
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| 378 | } |
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| 379 | |
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[6139] | 380 | SDL_mutexP(self->threadTerminationMutex); |
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| 381 | self->thread_write_running = false; |
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| 382 | |
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| 383 | if ( !self->thread_read_running ) |
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| 384 | { |
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| 385 | //delete self; |
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| 386 | SDL_mutexV(self->threadTerminationMutex); |
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| 387 | } |
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| 388 | else |
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| 389 | { |
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| 390 | SDL_mutexV(self->threadTerminationMutex); |
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| 391 | } |
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| 392 | |
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| 393 | |
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| 394 | PRINTF(0)("QUIT WRITE THREAD\n"); |
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[5630] | 395 | return 0; |
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| 396 | } |
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| 397 | |
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[5996] | 398 | bool NetworkSocket::writePacket( byte * data, int length ) |
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| 399 | { |
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[6582] | 400 | PRINTF(5)("NetworkSocket::writePacket() size=%d\n", length); |
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[5996] | 401 | |
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[6582] | 402 | if ( length > 1024 ) |
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| 403 | PRINTF(2)("WARNING SENDING BIG PACKET SIZE = %d\n", length); |
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| 404 | |
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[6341] | 405 | byte blen[INTSIZE]; |
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[5996] | 406 | |
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[6341] | 407 | Converter::intToByteArray( length, blen, INTSIZE ); |
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| 408 | |
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| 409 | writeBytes(blen, INTSIZE); |
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[5996] | 410 | writeBytes(data, length); |
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| 411 | } |
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| 412 | |
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| 413 | int NetworkSocket::readPacket( byte * data, int maxLength ) |
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| 414 | { |
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[6139] | 415 | PRINTF(5)("NetworkSocket::readPacket()\n"); |
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[6341] | 416 | if (incomingBufferLength<INTSIZE) |
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[5996] | 417 | { |
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| 418 | return 0; |
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| 419 | } |
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| 420 | |
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[6341] | 421 | int blen; |
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| 422 | Converter::byteArrayToInt( incomingBuffer, &blen ); |
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[5996] | 423 | |
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| 424 | if (blen>maxLength) |
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| 425 | { |
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| 426 | PRINTF(1)("Buffersize is too small (%d) for packet (%d)\n", maxLength, blen); |
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| 427 | return 0; |
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| 428 | } |
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| 429 | |
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| 430 | if (blen>incomingBufferLength) |
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| 431 | { |
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| 432 | return 0; |
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| 433 | } |
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| 434 | |
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[6341] | 435 | byte t[INTSIZE]; |
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| 436 | readBytes(t, INTSIZE); |
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[5996] | 437 | int res = readBytes(data, blen); |
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| 438 | |
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| 439 | if (res!=blen) |
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| 440 | return -1; |
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| 441 | else |
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| 442 | return blen; |
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| 443 | |
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| 444 | } |
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| 445 | |
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| 446 | |
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