Mercurial > cabal

annotate sources/network.cpp @ 2:19227b0b7cc1

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.h => .hpp for the headers added year 2008 to copyright notes renamed some functions for better meaning prepared parser module for rewriting added showHelp() function some code clean up
author Vlad Glagolev <enqlave@gmail.com>
date Mon, 21 Jan 2008 01:14:10 +0300
parents bafff9de2a76
children a7051ac7118b
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 socketClose();
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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::hostResolve(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
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95 bool e = 0;
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96
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97 struct addrinfo hints, *res, *reso;
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98 struct sockaddr_in *in;
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99 struct sockaddr_in6 *in6;
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100
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101 memset(&hints, 0, sizeof (hints));
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102
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103 hints.ai_socktype = SOCK_STREAM;
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104
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105 if (getaddrinfo(name, "domain", &hints, &res) < 0)
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106 return 0;
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107
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108 reso = res;
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109
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110 while (res) {
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111 if (!inet || res->ai_family == inet) {
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112 switch (res->ai_family) {
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113 case AF_INET6:
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114 a->inet = AF_INET6;
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115 in6 = (struct sockaddr_in6 *)res->ai_addr;
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116 memcpy (&a->sa6.sin6_addr, &in6->sin6_addr, \
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117 sizeof (struct in6_addr));
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118 e = 1;
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119 break;
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120 case AF_INET:
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121 a->inet = AF_INET;
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122 in = (struct sockaddr_in *)res->ai_addr;
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123 memcpy (&a->sa.sin_addr, &in->sin_addr, \
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124 sizeof (struct in_addr));
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125 e = 1;
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126 break;
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127 default:
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128 e = 0;
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129 }
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130 }
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131
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132 if (e)
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133 break;
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134
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135 res = res->ai_next;
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136 }
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137
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138 freeaddrinfo(reso);
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139
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140 return e;
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141
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142 #else
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143
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144 if (inet && inet != AF_INET)
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145 return 0;
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146
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147 a->inet = AF_INET;
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148
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149 struct hostent *he;
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150
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151 if (!(he = gethostbyname(name))) {
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152 a->sa.sin_addr.s_addr = inet_addr(name);
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153
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154 if (a->sa.sin_addr.s_addr)
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155 return 0;
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156 } else
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157 memcpy(&a->sa.sin_addr.s_addr, he->h_addr_list[0], he->h_length);
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158
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159 return 1;
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160
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161 #endif // ENABLE_IPV6
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162 }
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163
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164 bool Network::tcpActivate (int port, pchar host)
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165 {
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166 cs = socket(address.inet, SOCK_STREAM, IPPROTO_TCP);
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167
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168 if (cs == -1)
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169 return 0;
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170
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171 if (host) {
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172 struct address_type a;
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173
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174 if (!hostResolve(host, &a, address.inet)) {
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175 close(cs);
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176 return 0;
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177 }
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178
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179 int e;
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180
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181 #ifdef ENABLE_IPV6
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182 if (a.inet == AF_INET6)
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183 e = bind(cs, (struct sockaddr *)&a.sa6, sizeof (a.sa6));
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184 else
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185 #endif // ENABLE_IPV6
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186 e = bind(cs, (struct sockaddr *)&a.sa, sizeof (a.sa));
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187
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188 if (e == -1) {
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189 close(cs);
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190 return 0;
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191 }
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192 }
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193
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194 #ifdef ENABLE_IPV6
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195 if (address.inet == AF_INET6) {
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196 address.sa6.sin6_family = AF_INET6;
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197 address.sa6.sin6_port = htons(port);
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198 }
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199 else {
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200 #endif // ENABLE_IPV6
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201 address.sa.sin_family = AF_INET;
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202 address.sa.sin_port = htons(port);
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203 #ifdef ENABLE_IPV6
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204 }
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205 #endif // ENABLE_IPV6
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206
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207 socklen_t parm;
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208
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209 setsockopt(cs, IPPROTO_TCP, TCP_NODELAY, (pchar)&parm, sizeof(parm));
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210
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211 connected = 0;
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212 connecting = 1;
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213
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214 cout << "NETWORK: socket opened........... " << cs << endl;
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215
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216 return 1;
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217 }
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218
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219 bool Network::hostOpen()
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220 {
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221 int e;
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222 #ifdef ENABLE_IPV6
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223 if (address.inet == AF_INET6)
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224 e = connect(cs, (struct sockaddr *)&address.sa6, sizeof(address.sa6));
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225 else
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226 #endif // ENABLE_IPV6
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227 e = connect(cs, (struct sockaddr *)&address.sa, sizeof(address.sa));
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228
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229 if (e == -1) {
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230 if (errno == EISCONN) {
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231 connected = 1;
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232 connecting = 0;
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233
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234 return 1;
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235 }
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236
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237 if (errno != EWOULDBLOCK && errno != EINPROGRESS && errno != EALREADY) {
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238 socketClose();
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239
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240 connecting = 0;
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241
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242 return 0;
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243 }
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244
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245 return 1;
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246 }
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247
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248 connected = 1;
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249 connecting = 0;
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250
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251 cout << "NETWORK: socket connected........ " << cs << endl;
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252
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253 return 1;
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254 }
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255
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256 bool Network::socketClose()
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257 {
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258 if (cs == -1)
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259 return 0;
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260
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261 close (cs);
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262
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263 cs = -1;
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264
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265 return 1;
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266 }
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267
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268 int Network::canRead(int socket)
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269 {
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270 FD_ZERO(&rs);
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271 FD_SET(socket, &rs);
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272
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273 timeout.tv_sec = 0;
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274 timeout.tv_usec = 1;
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275
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276 int e = select(socket + 1, &rs, 0, 0, &timeout);
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277
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278 FD_ZERO(&rs);
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279
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280 return e;
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281 }
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282
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283 int Network::canWrite(int socket)
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284 {
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285 FD_ZERO(&ws);
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286 FD_SET(socket, &ws);
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287
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288 timeout.tv_sec = 0;
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289 timeout.tv_usec = 1;
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290
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291 int e = select(socket + 1, 0, &ws, 0, &timeout);
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292
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293 FD_ZERO(&ws);
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294
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295 return e;
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296 }