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: Benjamin Wuest |
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13 | co-programmer: ... |
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14 | */ |
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15 | |
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16 | /* this is for debug output. It just says, that all calls to PRINT() belong to the DEBUG_MODULE_NETWORK module |
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17 | For more information refere to https://www.orxonox.net/cgi-bin/trac.cgi/wiki/DebugOutput |
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18 | */ |
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19 | #define DEBUG_MODULE_NETWORK |
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20 | |
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21 | //#include ... |
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22 | |
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23 | /* include my own header */ |
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24 | #include "network_protocol.h" |
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25 | |
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26 | /* include the synchronizeable object */ |
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27 | #include "synchronizeable.h" |
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28 | |
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29 | /* include this file for debugging */ |
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30 | #include "debug.h" |
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31 | |
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32 | #include "converter.h" |
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33 | |
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34 | /* using namespace std is default, this needs to be here */ |
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35 | |
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36 | |
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37 | |
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38 | /** |
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39 | standard constructor |
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40 | */ |
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41 | NetworkProtocol::NetworkProtocol() |
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42 | { |
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43 | /* set the class id for the base object */ |
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44 | this->setClassID(CL_NETWORK_PROTOCOL, "NetworkProtocol"); |
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45 | this->headerLength = INTSIZE+FLOATSIZE; |
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46 | } |
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47 | |
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48 | /** |
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49 | standard destructor |
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50 | */ |
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51 | NetworkProtocol::~NetworkProtocol() |
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52 | {} |
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53 | |
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54 | /** |
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55 | * creates a new packet header from the function arguments |
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56 | * |
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57 | * @arg data: the binary data without header -> return the data in this binary array |
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58 | * @arg length: the data length without header |
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59 | * @arg bufferLength: the length of the internal buffer |
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60 | * @arg source: reference to the source Synchronizeable object |
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61 | * @return: the new data length with header (the header data is included into byte* data) |
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62 | * -1 if there isn't enough space in the buffer for the header |
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63 | */ |
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64 | int NetworkProtocol::createHeader(byte* data, int length, int bufferLength, const Synchronizeable& source) |
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65 | { |
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66 | PRINTF(5)("create header length = %i, bufferLength = %i\n", length, bufferLength); |
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67 | //If there isn't enough space for the header return -1 |
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68 | if (length + 2*INTSIZE > bufferLength) |
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69 | return -1; |
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70 | |
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71 | |
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72 | // FIXME: without move Create space for the header |
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73 | for( int i = length - 1; i >= 0; i--) |
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74 | data[i + INTSIZE+INTSIZE] = data[i]; |
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75 | |
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76 | //Now create the header |
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77 | /* sender ID: FIXME: there will be a better ID (for example unique:D)*/ |
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78 | //data[0] = (byte)(source.getUniqueID()); |
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79 | int res = Converter::intToByteArray( source.getUniqueID(), data, bufferLength ); |
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80 | |
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81 | /* data length*/ |
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82 | //data[1] = length; |
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83 | res += Converter::intToByteArray( length, data+res, bufferLength-res ); |
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84 | |
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85 | |
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86 | return length + res; |
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87 | } |
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88 | |
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89 | /** |
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90 | * extracts the header from the binary data stream |
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91 | * @arg data: the binary data with the header |
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92 | * @arg length: the length of the binary data (including header) |
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93 | * @return: a Header struct with the header information and the binary data |
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94 | */ |
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95 | Header NetworkProtocol::extractHeader(byte* data, int length) |
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96 | { |
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97 | PRINTF(5)("extract Header\n"); |
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98 | //Test if received data can contain a header |
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99 | if (length < 2*INTSIZE) |
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100 | { |
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101 | PRINTF(1)("Received data is to short; it can't contain a header!\n"); |
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102 | Header h; |
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103 | h.length = 0; |
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104 | return h; |
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105 | } |
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106 | |
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107 | //Extract header |
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108 | Header h; |
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109 | //&h = data; |
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110 | |
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111 | /* unique ID */ |
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112 | //h.synchronizeableID = data[0]; |
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113 | int res = Converter::byteArrayToInt( data, &(h.synchronizeableID) ); |
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114 | /* data length*/ |
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115 | //h.length = data[1]; |
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116 | Converter::byteArrayToInt( data+res, &(h.length) ); |
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117 | |
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118 | |
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119 | return h; |
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120 | } |
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