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annotate C++/modules/Socket/SocketTcp.cpp @ 380:06b0f405c58f

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Socket: initial support for object-oriented addresses
author David Demelier <markand@malikania.fr>
date Fri, 19 Jun 2015 13:56:12 +0200
parents 92457ea8f7e2
children
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1 /*
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2 * SocketTcp.cpp -- portable C++ socket wrappers
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3 *
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4 * Copyright (c) 2013, 2014 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include "SocketAddress.h"
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20 #include "SocketTcp.h"
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21
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22 void SocketTcp::listen(int max)
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23 {
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24 if (::listen(m_handle, max) == Error) {
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25 throw SocketError(SocketError::System, "listen");
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26 }
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27 }
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28
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29 std::unique_ptr<SocketTcp> SocketTcp::accept()
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30 {
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31 std::unique_ptr<SocketAddress> dummy;
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32
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33 return accept(dummy);
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34 }
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35
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36 std::unique_ptr<SocketTcp> SocketTcp::accept(std::unique_ptr<SocketAddress> &info)
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37 {
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38 Socket::Handle handle;
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39
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40 // Store the information
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41 sockaddr_storage address;
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42 socklen_t addrlen;
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43
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44 addrlen = sizeof (sockaddr_storage);
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45 handle = ::accept(m_handle, reinterpret_cast<sockaddr *>(&address), &addrlen);
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46
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47 if (handle == Invalid) {
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48 #if defined(_WIN32)
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49 int error = WSAGetLastError();
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50
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51 if (error == WSAEWOULDBLOCK) {
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52 throw SocketError(SocketError::WouldBlockRead, "accept", error);
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53 }
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54
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55 throw SocketError(SocketError::System, "accept", error);
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56 #else
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57 if (errno == EAGAIN || errno == EWOULDBLOCK) {
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58 throw SocketError(SocketError::WouldBlockRead, "accept");
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59 }
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60
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61 throw SocketError(SocketError::System, "accept");
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62 #endif
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63 }
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64
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65 info = SocketAddress::decode(address, addrlen);
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66
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67 return std::make_unique<SocketTcp>(handle);
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68 }
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69
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70 void SocketTcp::connect(const std::unique_ptr<SocketAddress> &address)
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71 {
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72 if (m_state == SocketState::Connected) {
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73 return;
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74 }
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75
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76 auto &sa = address->address();
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77 auto addrlen = address->length();
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78
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79 if (::connect(m_handle, reinterpret_cast<const sockaddr *>(&sa), addrlen) == Error) {
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80 /*
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81 * Determine if the error comes from a non-blocking connect that cannot be
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82 * accomplished yet.
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83 */
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84 #if defined(_WIN32)
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85 int error = WSAGetLastError();
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86
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87 if (error == WSAEWOULDBLOCK) {
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88 throw SocketError(SocketError::WouldBlockWrite, "connect", error);
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89 }
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90
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91 throw SocketError(SocketError::System, "connect", error);
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92 #else
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93 if (errno == EINPROGRESS) {
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94 throw SocketError(SocketError::WouldBlockWrite, "connect");
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95 }
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96
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97 throw SocketError(SocketError::System, "connect");
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98 #endif
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99 }
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100
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101 m_state = SocketState::Connected;
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102 }
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103
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104 unsigned SocketTcp::recv(void *data, unsigned dataLen)
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105 {
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106 int nbread;
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107
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108 nbread = ::recv(m_handle, (Socket::Arg)data, dataLen, 0);
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109 if (nbread == Error) {
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110 #if defined(_WIN32)
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111 int error = WSAGetLastError();
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112
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113 if (error == WSAEWOULDBLOCK) {
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114 throw SocketError(SocketError::WouldBlockRead, "recv", error);
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115 }
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116
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117 throw SocketError(SocketError::System, "recv", error);
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118 #else
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119 if (errno == EAGAIN || errno == EWOULDBLOCK) {
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120 throw SocketError(SocketError::WouldBlockRead, "recv");
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121 }
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122
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123 throw SocketError(SocketError::System, "recv");
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124 #endif
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125 } else if (nbread == 0) {
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126 m_state = SocketState::Closed;
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127 }
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128
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129 return (unsigned)nbread;
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130 }
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131
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132 unsigned SocketTcp::send(const void *data, unsigned length)
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133 {
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134 int nbsent;
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135
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136 nbsent = ::send(m_handle, (Socket::ConstArg)data, length, 0);
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137 if (nbsent == Error) {
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138 #if defined(_WIN32)
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139 int error = WSAGetLastError();
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140
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141 if (error == WSAEWOULDBLOCK) {
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142 throw SocketError(SocketError::WouldBlockWrite, "send", error);
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143 }
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144
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145 throw SocketError(SocketError::System, "send", error);
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146 #else
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147 if (errno == EAGAIN || errno == EWOULDBLOCK) {
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148 throw SocketError(SocketError::WouldBlockWrite, "send");
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149 }
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150
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151 throw SocketError(SocketError::System, "send");
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152 #endif
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153 }
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154
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155 return (unsigned)nbsent;
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156 }