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4
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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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5
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11 import dreactor.core.Vat;
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6
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12 import dreactor.core.Dispatcher;
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4
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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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10
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19 class RawTCPListener
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4
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20 {
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21 public
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6
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22 this(Dispatcher mgr, Vat sel, IPv4Address addr)
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4
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23 {
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24 manager = mgr;
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25 mgr.events(Event.Read);
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10
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26 mgr.setOutgoingHandler(&RawTCPHandler.onSend);
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8
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27 mgr.setIncomingHandler(&onReceive);
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4
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28 mgr.setConnectHandler(&accept);
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10
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29 mgr.setErrorHandler(&RawTCPHandler.onError);
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30 mgr.setDisconnectHandler(&RawTCPHandler.onHangup);
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4
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31 mgr.listen(addr);
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9
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32
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33 sel.addConnection(mgr);
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5
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34 vat = sel;
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4
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35 log = Log.lookup("dreactor.protocol.RawTcpServer");
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36 log.info("log initialized");
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6
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37 children = new CircularSeq!(Dispatcher);
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4
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38 }
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8
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39 this(Vat sel, IPv4Address addr)
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40 {
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41 AsyncSocketConduit cond = new AsyncSocketConduit;
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9
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42 cond.socket().setAddressReuse(true);
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8
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43 Dispatcher lh = new Dispatcher(cond, true);
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44 this(lh, sel, addr);
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45 }
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9
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46
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47 ~this()
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48 {
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10
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49 close();
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9
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50 }
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51
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4
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52 int accept(Conduit cond, RegisterD reg)
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53 {
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54 AsyncSocketConduit newcond = new AsyncSocketConduit;
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55 (cast(AsyncSocketConduit)cond).socket().accept(newcond.socket);
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6
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56 Dispatcher h = Dispatcher.New(newcond, manager);
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57 h.events(Event.Read);
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58 vat.addConnection(h);
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59 children.append(h);
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60 log.info("accepted new connection");
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61 return 0;
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62 }
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63
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9
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64 int broadcast(char[] outbuf, Dispatcher[] excluded = null)
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4
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65 {
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6
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66 foreach(Dispatcher h; children)
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67 {
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68 if (excluded && excluded.includes(h))
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69 continue;
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70 if (h.appendOutBuffer(outbuf))
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71 {
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72 h.addEvent(Event.Write);
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73 vat.addConnection(h);
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74 }
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75 }
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76 return 0;
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77 }
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9
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78
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79 /**************************************************************************
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80
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81 send
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82 User-called function to send data to the counterpart at the other
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83 end of the connection. This sets up the connection manager to send
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84 data as the socket becomes free.
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85
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86 **************************************************************************/
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87 int send(Dispatcher d, char[] outbuf, IPv4Address addr = null)
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88 {
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89 if (d.appendOutBuffer(outbuf))
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90 {
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91 d.addEvent(Event.Write);
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92 if (!vat.addConnection(d))
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93 {
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94 log.error("unable to register mgr");
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95 }
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96 }
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97 return 0;
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98 }
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8
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99
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10
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100 /**************************************************************************
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101
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102 receive
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103 IncomingHandlerD
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104 Default incoming data handler. Should be replaced with something useful.
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105
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106 **************************************************************************/
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107 int onReceive(Dispatcher h)
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108 {
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109 Logger log = Log.lookup("Handlers.onReceive");
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110
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111 char inbuf[8192];
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112 int amt;
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113 if((amt = h.transport.read(inbuf)) > 0)
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114 {
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115 if (dataHandler)
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116 dataHandler(inbuf[0 .. amt], h);
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117 else
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118 log.info("Received {} byte Buffer: {}", amt, inbuf[0 .. amt]);
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119 }
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120 else
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121 {
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122 if (amt == 0)
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123 {
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124 children.remove(h);
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125 (cast(AsyncSocketConduit) h.transport).shutdown();
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126 return CLOSE;
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127 }
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128 log.error("Received no data, err = {}", amt);
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129 }
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130 return REMAIN;
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131 }
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132
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133 void close()
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134 {
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135 foreach(Dispatcher d; children)
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136 {
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137 (cast(AsyncSocketConduit)d.transport).shutdown();
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138 (cast(AsyncSocketConduit)d.transport).detach();
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139 }
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140 (cast(AsyncSocketConduit)manager.transport).shutdown();
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141 (cast(AsyncSocketConduit)manager.transport).detach();
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4
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142
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143 }
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144
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145 void setDataHandler(void delegate(char[], Dispatcher) h)
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146 {
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147 dataHandler = h;
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148 }
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149
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150 private
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151 Vat vat;
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152 CircularSeq!(Dispatcher) children;
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153 Dispatcher manager;
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154 Logger log;
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155 RawTCPHandler h;
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156 void delegate(char[], Dispatcher) dataHandler;
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157 }
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158
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10
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159 class RawTCPClient
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160 {
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161
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162 public
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163 this(Dispatcher mgr, Vat sel, Event evts = Event.Read)
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164 {
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165 manager = mgr;
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166 manager.events(evts);
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167 connected = false;
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168 mgr.setOutgoingHandler(&RawTCPHandler.onSend);
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169 mgr.setIncomingHandler(&onReceive);
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170 mgr.setErrorHandler(&RawTCPHandler.onError);
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171 mgr.setDisconnectHandler(&RawTCPHandler.onHangup);
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172 vat = sel;
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173 log = Log.lookup("dreactor.protocol.RawTcpClient");
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174 }
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175
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176 this(Vat sel, Event evts = Event.Read)
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177 {
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178 AsyncSocketConduit clcond = new AsyncSocketConduit;
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179 Dispatcher ch = new Dispatcher(clcond);
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180 this(ch, sel, evts);
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181 }
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4
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182
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9
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183 ~this()
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184 {
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185 (cast(AsyncSocketConduit)manager.transport).shutdown();
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186 (cast(AsyncSocketConduit)manager.transport).detach();
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187 }
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188
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4
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189 int connect(IPv4Address addr)
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190 {
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191 (cast(AsyncSocketConduit) manager.transport()).connect(addr);
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192 vat.addConnection(manager);
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193 connected = true;
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194 log.info("connected to {}", addr);
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195 return 0;
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196 }
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197
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198 /**************************************************************************
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199
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200 send
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201 User-called function to send data to the counterpart at the other
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202 end of the connection. This sets up the connection manager to send
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203 data as the socket becomes free.
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204
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205 **************************************************************************/
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206 int send(char[] outbuf, IPv4Address addr = null)
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207 {
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208 if (!connected)
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209 {
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210 log.info("send: not connected, connecting");
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211 if (addr !is null)
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212 {
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213 if (0 > connect(addr))
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214 {
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215 log.error("send: unable to connect");
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216 return -1;
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217 }
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218 }
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219 }
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220 if (manager.appendOutBuffer(outbuf))
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221 {
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222 manager.addEvent(Event.Write);
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223 if (!vat.addConnection(manager))
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224 {
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225 log.error("unable to register mgr");
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226 }
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227 }
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228 return 0;
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229 }
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230
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10
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231 /**************************************************************************
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232
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233 receive
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234 IncomingHandlerD
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235 Default incoming data handler. Should be replaced with something useful.
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236
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237 **************************************************************************/
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238 public int onReceive(Dispatcher h)
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239 {
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240 Logger log = Log.lookup("Handlers.onReceive");
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241
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242 char inbuf[8192];
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243 int amt;
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244 if((amt = h.transport.read(inbuf)) > 0)
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245 {
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246 if (dataHandler)
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247 dataHandler(inbuf[0 .. amt], h);
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248 else
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249 log.info("Received {} byte Buffer: {}", amt, inbuf[0 .. amt]);
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250 }
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251 else
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252 {
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253 if (amt == 0)
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254 {
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255 return CLOSE;
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256 }
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257 log.error("Received no data, err = {}", amt);
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258 }
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259 return REMAIN;
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260 }
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261
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262 void setDataHandler(void delegate(char[], Dispatcher) h)
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263 {
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264 dataHandler = h;
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265 }
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4
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266 private
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10
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267 void delegate(char[], Dispatcher) dataHandler;
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268 Dispatcher manager;
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269 Vat vat;
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270 bool connected;
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10
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271 Logger log;
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272 RawTCPHandler h;
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4
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273 }
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274
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275
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276 /******************************************************************************
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277
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278 Default Event handlers common to both listener/clients
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279
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280 ******************************************************************************/
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10
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281 struct RawTCPHandler
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4
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282 {
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10
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283 /**************************************************************************
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284
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285 onSend
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286 OutgoingHandlerD
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287 To be registered as the response to socket writable event.
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288 Sends data, returns amount sent. Unregisters Handler for sending
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289 if there is no more data left to send.
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290
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291 ***************************************************************************/
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292 public static int onSend(Dispatcher h)
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293 {
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294 Logger log = Log.lookup("Handlers.onSend");
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295
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296 char[] outbuf = h.nextBuffer();
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297 if (outbuf !is null)
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4
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298 {
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10
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299 int sent = h.transport.write(outbuf);
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300 if (sent > 0)
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4
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301 {
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10
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302 if (! h.addOffset(sent))
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303 {
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304 h.remEvent(Event.Write);
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305 return REREGISTER;
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306 }
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4
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307 }
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10
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308 else if (sent == AsyncSocketConduit.Eof)
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309 {
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310 log.error("Select said socket was writable, but sent 0 bytes");
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311 }
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312 else
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313 {
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314 log.error("Socket send return ERR");
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315 }
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316 return REMAIN;
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4
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317 }
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318 else
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319 {
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10
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320 h.remEvent(Event.Write);
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321 return REREGISTER;
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4
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322 }
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323 }
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324
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10
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325 static int onHangup(Dispatcher d)
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8
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326 {
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10
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327 return UNREGISTER;
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8
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328 }
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329
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10
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330 static int onError(Dispatcher d, RegisterD unreg)
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331 {
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332 return CLOSE;
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333 }
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334
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8
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335 }
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336
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337 bool includes(Dispatcher[] haystack, Dispatcher needle)
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338 {
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339 foreach(Dispatcher h; haystack)
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340 {
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341 if (h is needle)
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342 return true;
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343 }
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344 return false;
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345 }
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