Mercurial > cabal

annotate sources/network.cpp @ 5:0faceb076254

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code clean up added PID to the default Core argument bool => true|false
author Vlad Glagolev <enqlave@gmail.com>
date Thu, 24 Jan 2008 21:00:52 +0300
parents a7051ac7118b
children 9be05a31b7f9
rev   line source
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1 /**
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2 * network.cpp (2007-04-02)
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3 *
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4 * -- CABAL -- network essentials (sockets, etc.)
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5 *
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6 * Copyright (c) 2007-2008 Vlad Glagolev <enqlave@gmail.com>
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7 * All rights reserved.
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8 *
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9 * Permission to use, copy, modify, and distribute this software for any
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10 * purpose with or without fee is hereby granted, provided that the above
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11 * copyright notice and this permission notice appear in all copies.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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20 */
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21
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22 #include "cabal.hpp" // required: network.hpp
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23
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24 Network::Network()
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25 {
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26 cout << "NETWORK: going online...\n";
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27 }
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28
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29 Network::~Network()
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30 {
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31 closeSocket();
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32
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33 cout << "NETWORK: offline\n";
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34 }
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35
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36 void Network::sendMsg(string m)
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37 {
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38 if (cs == -1)
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39 return;
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40
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41 if (CABAL->debug)
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42 cout << "<- " << cs << " -- " << m << endl;
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43
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44 send(cs, (m + "\n").c_str(), (m + "\n").size(), 0);
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45 }
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46
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47 string Network::receiveMsg()
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48 {
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49 if (cs == -1)
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50 return 0;
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51
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52 if (canRead(cs)) {
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53 string sbuffer = "";
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54 char cbuffer;
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55
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56 int err = recv(cs, &cbuffer, 1, 0);
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57
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58 if (err > 0) {
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59 sbuffer += cbuffer;
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60
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61 while (1) {
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62 if (sbuffer[sbuffer.size() - 1] == '\n') {
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63 sbuffer = (sbuffer.substr(0, 1) == ":")
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64 ? sbuffer.substr(1, sbuffer.size() - 3)
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65 : sbuffer.substr(0, sbuffer.size() - 2);
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66
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67 if (CABAL->debug)
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68 cout << "-> " << cs << " -- " << sbuffer << endl;
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69
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70 return sbuffer;
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71 }
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72
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73 err = recv(cs, &cbuffer, 1, 0);
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74
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75 if (!err)
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76 shut("remote server closed connection");
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77 else if (err < 0)
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78 shut("failed to receive data");
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79 else
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80 sbuffer += cbuffer;
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81 }
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82 } else if (!err)
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83 shut("remote server closed connection");
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84
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85 return sbuffer;
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86 }
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87
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88 return "";
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89 }
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90
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91 bool Network::resolveHost(pchar name, struct address_type *a, int inet)
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92 {
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93 #ifdef ENABLE_IPV6
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94 bool e = false;
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95
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96 struct addrinfo hints, *res, *reso;
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97 struct sockaddr_in *in;
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98 struct sockaddr_in6 *in6;
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99
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100 memset(&hints, 0, sizeof (hints));
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101
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102 hints.ai_socktype = SOCK_STREAM;
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103
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104 if (getaddrinfo(name, "domain", &hints, &res) < 0)
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105 return 0;
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106
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107 reso = res;
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108
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109 while (res) {
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110 if (!inet || res->ai_family == inet) {
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111 switch (res->ai_family) {
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112 case AF_INET6:
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113 a->inet = AF_INET6;
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114 in6 = (struct sockaddr_in6 *)res->ai_addr;
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115 memcpy (&a->sa6.sin6_addr, &in6->sin6_addr, \
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116 sizeof (struct in6_addr));
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117 e = true;
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118 break;
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119 case AF_INET:
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120 a->inet = AF_INET;
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121 in = (struct sockaddr_in *)res->ai_addr;
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122 memcpy (&a->sa.sin_addr, &in->sin_addr, \
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123 sizeof (struct in_addr));
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124 e = true;
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125 break;
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126 default:
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127 e = false;
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128 }
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129 }
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130
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131 if (e)
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132 break;
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133
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134 res = res->ai_next;
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135 }
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136
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137 freeaddrinfo(reso);
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138
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139 return e;
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140 #else
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141 if (inet && inet != AF_INET)
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142 return 0;
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143
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144 a->inet = AF_INET;
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145
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146 struct hostent *he;
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147
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148 if (!(he = gethostbyname(name))) {
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149 a->sa.sin_addr.s_addr = inet_addr(name);
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150
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151 if (a->sa.sin_addr.s_addr)
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152 return 0;
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153 } else
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154 memcpy(&a->sa.sin_addr.s_addr, he->h_addr_list[0], he->h_length);
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155
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156 return 1;
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157 #endif // ENABLE_IPV6
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158 }
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159
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160 bool Network::activateTCP(int port, pchar host)
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161 {
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162 cs = socket(address.inet, SOCK_STREAM, IPPROTO_TCP);
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163
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164 if (cs == -1)
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165 return 0;
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166
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167 if (host) {
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168 struct address_type a;
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169
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170 if (!resolveHost(host, &a, address.inet)) {
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171 close(cs);
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172 return 0;
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173 }
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174
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175 int e;
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176
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177 #ifdef ENABLE_IPV6
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178 if (a.inet == AF_INET6)
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179 e = bind(cs, (struct sockaddr *)&a.sa6, sizeof(a.sa6));
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180 else
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181 #endif // ENABLE_IPV6
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182 e = bind(cs, (struct sockaddr *)&a.sa, sizeof(a.sa));
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183
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184 if (e == -1) {
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185 close(cs);
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186 return 0;
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187 }
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188 }
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189
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190 #ifdef ENABLE_IPV6
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191 if (address.inet == AF_INET6) {
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192 address.sa6.sin6_family = AF_INET6;
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193 address.sa6.sin6_port = htons(port);
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194 }
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195 else {
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196 #endif // ENABLE_IPV6
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197 address.sa.sin_family = AF_INET;
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198 address.sa.sin_port = htons(port);
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199 #ifdef ENABLE_IPV6
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200 }
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201 #endif // ENABLE_IPV6
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202
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203 socklen_t parm;
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204
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205 setsockopt(cs, IPPROTO_TCP, TCP_NODELAY, (pchar)&parm, sizeof(parm));
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206
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207 connected = 0;
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208 connecting = 1;
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209
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210 cout << "NETWORK: socket opened..........: " << cs << endl;
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211
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212 return 1;
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213 }
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214
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215 bool Network::openHost()
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216 {
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217 int e;
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218 #ifdef ENABLE_IPV6
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219 if (address.inet == AF_INET6)
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220 e = connect(cs, (struct sockaddr *)&address.sa6, sizeof(address.sa6));
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221 else
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222 #endif // ENABLE_IPV6
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223 e = connect(cs, (struct sockaddr *)&address.sa, sizeof(address.sa));
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224
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225 if (e == -1) {
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226 if (errno == EISCONN) {
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227 connected = true;
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228 connecting = false;
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229
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230 return 1;
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231 }
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232
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233 if (errno != EWOULDBLOCK && errno != EINPROGRESS && errno != EALREADY) {
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234 closeSocket();
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235
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236 connecting = false;
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237
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238 return 0;
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239 }
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240
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241 return 1;
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242 }
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243
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244 connected = true;
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245 connecting = false;
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246
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247 cout << "NETWORK: socket connected.......: " << cs << endl;
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248
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249 return 1;
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250 }
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251
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252 bool Network::closeSocket()
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253 {
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254 if (cs == -1)
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255 return 0;
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256
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257 close(cs);
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258
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259 cs = -1;
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260
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261 return 1;
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262 }
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263
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264 int Network::canRead(int socket)
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265 {
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266 FD_ZERO(&rs);
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267 FD_SET(socket, &rs);
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268
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269 timeout.tv_sec = 0;
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270 timeout.tv_usec = 1;
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271
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272 int e = select(socket + 1, &rs, 0, 0, &timeout);
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273
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274 FD_ZERO(&rs);
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275
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276 return e;
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277 }
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278
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279 int Network::canWrite(int socket)
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280 {
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281 FD_ZERO(&ws);
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282 FD_SET(socket, &ws);
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283
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284 timeout.tv_sec = 0;
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285 timeout.tv_usec = 1;
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286
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287 int e = select(socket + 1, 0, &ws, 0, &timeout);
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288
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289 FD_ZERO(&ws);
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290
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291 return e;
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292 }