Mercurial > cabal

annotate sources/network.cpp @ 0:bafff9de2a76

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Initial commit since summer'07
author Vlad Glagolev <enqlave@gmail.com>
date Sun, 20 Jan 2008 19:25:25 +0300
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children 19227b0b7cc1
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0
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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 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.h" // required: network.h
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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::msgSend (string data)
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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 << " -- " << data << endl;
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43
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44 send (cs, (data + "\n").c_str(), (data + "\n").size(), 0);
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45 }
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46
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47 string Network::msgReceive()
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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) == 1) {
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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 == 0)
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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 == 0)
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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 != 0) {
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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 != 0 && 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)) == 0) {
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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 == 1)
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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 != 0) {
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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
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223 #ifdef ENABLE_IPV6
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224 if (address.inet == AF_INET6)
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225 e = connect (cs, (struct sockaddr *)&address.sa6, sizeof (address.sa6));
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226 else
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227 #endif // ENABLE_IPV6
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228 e = connect (cs, (struct sockaddr *)&address.sa, sizeof (address.sa));
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229
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230 if (e == -1) {
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231 if (errno == EISCONN) {
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232 connected = 1;
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233 connecting = 0;
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234
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235 return 1;
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236 }
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237
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238 if (errno != EWOULDBLOCK && errno != EINPROGRESS && errno != EALREADY) {
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239 socketClose();
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240
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241 connecting = 0;
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242
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243 return 0;
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244 }
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245
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246 return 1;
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247 }
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248
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249 connected = 1;
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250 connecting = 0;
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251
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252 cout << "NETWORK: socket connected........ " << cs << endl;
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253
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254 return 1;
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255 }
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256
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257 bool Network::socketClose()
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258 {
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259 if (cs == -1)
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260 return 0;
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261
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262 close (cs);
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263
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264 cs = -1;
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265
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266 return 1;
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267 }
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268
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269 int Network::canRead (int socket)
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270 {
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271 FD_ZERO (&rs);
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272 FD_SET (socket, &rs);
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273
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274 timeout.tv_sec = 0;
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275 timeout.tv_usec = 1;
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276
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277 int e = select (socket + 1, &rs, 0, 0, &timeout);
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278
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279 FD_ZERO (&rs);
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280
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281 return e;
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282 }
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283
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284 int Network::canWrite (int socket)
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285 {
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286 FD_ZERO (&ws);
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287 FD_SET (socket, &ws);
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288
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289 timeout.tv_sec = 0;
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290 timeout.tv_usec = 1;
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291
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292 int e = select (socket + 1, 0, &ws, 0, &timeout);
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293
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294 FD_ZERO (&ws);
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295
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296 return e;
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297 }