1 | // Copyright (c) 2012 by István Váradi
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2 |
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3 | // This file is part of libxplcommon, a common utility library for
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4 | // development related to X-Plane
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5 |
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6 | // Redistribution and use in source and binary forms, with or without
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7 | // modification, are permitted provided that the following conditions are met:
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8 |
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9 | // 1. Redistributions of source code must retain the above copyright notice, this
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10 | // list of conditions and the following disclaimer.
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11 | // 2. Redistributions in binary form must reproduce the above copyright notice,
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12 | // this list of conditions and the following disclaimer in the documentation
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13 | // and/or other materials provided with the distribution.
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14 |
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15 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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16 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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17 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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18 | // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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19 | // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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20 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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21 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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22 | // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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23 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 |
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26 | // The views and conclusions contained in the software and documentation are those
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27 | // of the authors and should not be interpreted as representing official policies,
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28 | // either expressed or implied, of the FreeBSD Project.
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29 |
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30 | #ifndef XPLCOMMON_POSIX_ACCEPTOR_H
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31 | #define XPLCOMMON_POSIX_ACCEPTOR_H
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32 | //------------------------------------------------------------------------------
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33 |
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34 | #include "../Failable.h"
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35 |
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36 | #include <cstdlib>
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37 |
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38 | //------------------------------------------------------------------------------
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39 |
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40 | namespace xplcommon { namespace posix {
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41 |
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42 | //------------------------------------------------------------------------------
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43 |
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44 | class ServerSocket;
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45 |
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46 | //------------------------------------------------------------------------------
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47 |
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48 | /**
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49 | * Class representing the accepting of an incoming connection on a
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50 | * socket.
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51 | */
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52 | class Acceptor : public ::xplcommon::Failable
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53 | {
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54 | private:
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55 | /**
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56 | * The socket we belong to.
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57 | */
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58 | ServerSocket& socket;
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59 |
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60 | protected:
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61 | /**
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62 | * The file descriptor accepted the last time.
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63 | */
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64 | int acceptedFD;
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65 |
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66 | /**
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67 | * The buffer for the remote address, if we are interested.
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68 | */
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69 | unsigned char* address;
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70 |
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71 | /**
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72 | * The length of the remote address buffer.
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73 | */
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74 | size_t addressLength;
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75 |
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76 | protected:
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77 | /**
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78 | * Construct the acceptor.
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79 | *
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80 | * @param addressLength the length of the buffer for the peer
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81 | * address. If 0, not buffer will be created.
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82 | */
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83 | Acceptor(ServerSocket* socket, size_t addressLength = 0);
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84 |
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85 | public:
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86 | /**
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87 | * Destroy the acceptor.
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88 | */
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89 | virtual ~Acceptor();
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90 |
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91 | /**
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92 | * Start accepting a connection.
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93 | *
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94 | * If a connection is already accepted, but not retrieved yet, it
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95 | * returns true.
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96 | *
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97 | * If a new socket becomes immediately available, it returns true.
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98 | *
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99 | * If some error occurs, the acceptor is marked as failed.
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100 | */
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101 | bool accept();
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102 |
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103 | protected:
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104 | /**
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105 | * Called when a connection gets processed and we can become ready
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106 | * for the next one.
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107 | */
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108 | void connectionProcessed();
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109 | };
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110 |
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111 | //------------------------------------------------------------------------------
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112 | // Inline definitions
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113 | //------------------------------------------------------------------------------
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114 |
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115 | inline Acceptor::Acceptor(ServerSocket* socket, size_t addressLength) :
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116 | socket(*socket),
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117 | acceptedFD(-1),
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118 | address( (addressLength==0) ? 0 : new unsigned char[addressLength]),
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119 | addressLength(addressLength)
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120 | {
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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 | inline void Acceptor::connectionProcessed()
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126 | {
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127 | acceptedFD = -1;
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128 | }
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129 |
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130 | //------------------------------------------------------------------------------
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131 |
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132 | } /* namespace xplcommon::posix */ } /* namespace xplcommon */
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133 |
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134 | //------------------------------------------------------------------------------
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135 | #endif // XPLCOMMON_POSIX_ACCEPTOR_H
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136 |
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137 | // Local Variables:
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138 | // mode: C++
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139 | // c-basic-offset: 4
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140 | // indent-tabs-mode: nil
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141 | // End:
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