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1 module dreactor.protocol.RawTcp;
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2
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3 import tango.io.Conduit;
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4 import tango.io.selector.model.ISelector;
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5 import tango.net.Socket;
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6 import tango.util.collection.CircularSeq;
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7 import tango.util.log.Log;
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8 import tango.util.log.Config;
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9
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10 import dreactor.transport.AsyncSocketConduit;
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11 import dreactor.core.SelectLoop;
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12 import dreactor.core.ConnectionHandler;
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13
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14 /******************************************************************************
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15
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16 Basic TCP server or client routines for sending raw data.
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17
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18 ******************************************************************************/
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19 class RawTCPListener
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20 {
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21 public
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22 Logger log;
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23 this(ConnectionHandler mgr, SelectLoop sel, IPv4Address addr)
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24 {
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25 manager = mgr;
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26 mgr.events(Event.Read);
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27 mgr.setOutgoingHandler(&Handlers.onSend);
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28 mgr.setIncomingHandler(&Handlers.onReceive);
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29 mgr.setConnectHandler(&accept);
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30 mgr.listen(addr);
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31
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32 sel.addConnection(mgr);
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33 select = sel;
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34 log = Log.lookup("dreactor.protocol.RawTcpServer");
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35 log.info("log initialized");
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36 children = new CircularSeq!(ConnectionHandler);
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37 }
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38
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39 int accept(Conduit cond, RegisterD reg)
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40 {
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41 AsyncSocketConduit newcond = new AsyncSocketConduit;
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42 (cast(AsyncSocketConduit)cond).socket().accept(newcond.socket);
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43 ConnectionHandler h = ConnectionHandler.New(newcond, manager);
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44 h.events(Event.Read);
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45 select.addConnection(h);
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46 children.append(h);
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47 log.info("accepted new connection");
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48 return 0;
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49 }
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50
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51 int broadcast(char[] outbuf)
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52 {
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53 foreach(ConnectionHandler h; children)
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54 {
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55 if (h.appendOutBuffer(outbuf))
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56 {
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57 h.addEvent(Event.Write);
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58 select.addConnection(h);
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59 }
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60 }
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61 return 0;
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62 }
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63
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64 void close()
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65 {
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66
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67 }
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68
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69 private
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70 ConnectionHandler manager;
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71 SelectLoop select;
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72 CircularSeq!(ConnectionHandler) children;
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73 }
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74
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75 class RawTCPClient
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76 {
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77 public
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78 Logger log;
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79 this(ConnectionHandler mgr, SelectLoop sel, Event evts = Event.Read)
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80 {
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81 manager = mgr;
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82 manager.events(evts);
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83 connected = false;
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84 mgr.setOutgoingHandler(&Handlers.onSend);
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85 mgr.setIncomingHandler(&Handlers.onReceive);
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86 select = sel;
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87 log = Log.lookup("dreactor.protocol.RawTcpClient");
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88 }
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89
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90 int connect(IPv4Address addr)
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91 {
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92 (cast(AsyncSocketConduit) manager.transport()).connect(addr);
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93 select.addConnection(manager);
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94 connected = true;
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95 log.info("connected to {}", addr);
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96 return 0;
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97 }
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98
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99 /**************************************************************************
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100
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101 send
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102 User-called function to send data to the counterpart at the other
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103 end of the connection. This sets up the connection manager to send
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104 data as the socket becomes free.
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105
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106 **************************************************************************/
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107 int send(char[] outbuf, IPv4Address addr = null)
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108 {
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109 log.info("sending buffer: {}", outbuf);
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110 if (!connected)
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111 {
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112 log.info("not connected, connecting");
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113 if (addr !is null)
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114 {
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115 if (0 > connect(addr))
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116 {
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117 log.error("unable to connect");
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118 return -1;
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119 }
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120 }
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121 }
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122 if (manager.appendOutBuffer(outbuf))
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123 {
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124 manager.addEvent(Event.Write);
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125 if (!select.addConnection(manager))
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126 {
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127 log.error("unable to register mgr");
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128 }
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129 }
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130 return 0;
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131 }
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132
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133 private
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134 ConnectionHandler manager;
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135 SelectLoop select;
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136 bool connected;
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137 }
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138
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139
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140 /******************************************************************************
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141
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142 Default Event handlers common to both listener/clients
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143
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144 ******************************************************************************/
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145 class Handlers
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146 {
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147 /**************************************************************************
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148
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149 onSend
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150 OutgoingHandlerD
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151 To be registered as the response to socket writable event.
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152 Sends data, returns amount sent. Unregisters Handler for sending
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153 if there is no more data left to send.
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154
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155 ***************************************************************************/
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156 public static int onSend(ConnectionHandler h)
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157 {
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158 Logger log = Log.lookup("Handlers.onSend");
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159
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160 log.info("top of onSend");
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161 char[] outbuf = h.nextBuffer();
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162 if (outbuf !is null)
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163 {
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164 int sent = h.transport.write(outbuf);
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165 if (sent > 0)
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166 {
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167 if (! h.addOffset(sent))
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168 {
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169 h.remEvent(Event.Write);
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170 return REREGISTER;
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171 }
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172 }
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173 else if (sent == AsyncSocketConduit.Eof)
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174 {
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175 log.error("Select said socket was writable, but sent 0 bytes");
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176 }
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177 else
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178 {
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179 log.error("Socket send return ERR");
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180 }
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181 return REMAIN;
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182 }
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183 else
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184 {
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185 h.remEvent(Event.Write);
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186 return REREGISTER;
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187 }
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188 }
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189 /**************************************************************************
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190
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191 receive
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192 IncomingHandlerD
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193 Default incoming data handler. Should be replaced with something useful.
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194
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195 **************************************************************************/
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196 public static int onReceive(ConnectionHandler h)
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197 {
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198 Logger log = Log.lookup("Handlers.onReceive");
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199
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200 char inbuf[8192];
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201 int amt;
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202 if((amt = h.transport.read(inbuf)) > 0)
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203 log.info("Received Buffer: {}", inbuf[0 .. amt]);
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204 else
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205 log.error("Received no data, err = {}", amt);
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206
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207 return REMAIN;
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208 }
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209 }
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