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1 package rep.channel;
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2
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3 import java.net.InetSocketAddress;
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4 import java.net.SocketAddress;
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5 import java.util.HashMap;
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6 import java.util.LinkedList;
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7
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8 public class NetworkSimulator {
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9 // we don't use <P> because we need singleton.
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10 public static NetworkSimulator ns = new NetworkSimulator();
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11
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12 public HashMap<SocketAddress,Integer>namedb = new HashMap<SocketAddress,Integer>();
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13 public int ipcount = 1;
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14 public REPLogger logger;
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15
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16 public static NetworkSimulator singleton() {
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17 // singleton pattern may used here, but it has a little cost.
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18 return ns;
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19 }
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20
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21 int logLevel=5;
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22 /** Listening Servers. */
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23 private LinkedList<ServerData> serverList;
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24
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25 /** Constructor. */
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26 public NetworkSimulator(){
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27 serverList = new LinkedList<ServerData>();
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28 logger = REPLogger.singleton();
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29 logger.writeLog("construct Networksimulator", 1);
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30 // printAllState();
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31 }
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32
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33 /* */
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34 synchronized public void listen(InetSocketAddress ip, ServerChannelSimulator<?> scs) {
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35 serverList.add(new ServerData(ip, scs));
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36 logger.writeLog("listen", 1);
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37 printAllState();
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38 }
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39
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40 synchronized public boolean connect(InetSocketAddress ip, ChannelSimulator<?> CHclient) {
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41 logger.writeLog("connecting..", 1);
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42 for (ServerData sd0: serverList){
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43 // ANY address (0.0.0.0/0.0.0.0) should be considered.
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44 if (sd0.IP.getAddress().isAnyLocalAddress()) {
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45 if (sd0.IP.getPort() != ip.getPort()) continue;
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46 // we have to check, ip is really reachable to sd0 server,
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47 // but this simulator has no notion of host. To distinguish,
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48 // use different port address.
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49 } else if (!sd0.IP.equals(ip)) continue;
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50
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51 //ChannelSimulator<?> CHserver = new ChannelSimulator<?>();
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52 ChannelSimulator<?> CHserver = CHclient.newChannel();
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53 CHserver.setOtherEnd1(CHclient);
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54 CHclient.setOtherEnd1(CHserver);
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55
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56 sd0.connectedListS.add(CHserver);
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57 sd0.connectedListC.add(CHclient);
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58 sd0.scs.enQ(CHserver);
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59
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60 logger.writeLog("connected", 1);
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61 //printAllState();
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62 return true;
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63 }
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64 return false;
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65 }
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66
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67 /** for DEBUG methods. */
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68 void printAllState(){
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69 String log = "NetworkSimulator State:";
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70 for (ServerData sd: serverList){
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71 log += "\tSessionManager(ip="+sd.IP.toString()+"): ";
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72 log += channelList(sd.connectedListC);
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73 }
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74 logger.writeLog(log);
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75 }
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76
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77 private String channelList(LinkedList<ChannelSimulator<?>> list){
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78 String tmp = "";
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79 for (ChannelSimulator<?> ch: list){
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80 tmp += ch.toString()+" ";
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81 }
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82 return "\t"+tmp;
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83 }
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84
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85
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86
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87 public synchronized int nslookup(SocketAddress semaIP) {
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88 Integer ip;
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89 if ((ip=namedb.get(semaIP))==null) {
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90 namedb.put(semaIP, (ip=ipcount++));
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91 }
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92 return ip;
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93 }
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94
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95
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96 }
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97
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98 class ServerData {
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99 //int virtualIP;
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100 InetSocketAddress IP;
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101 //SelectorSimulator<P> selector;
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102 ServerChannelSimulator<?> scs;
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103 LinkedList<ChannelSimulator<?>> connectedListS;
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104 LinkedList<ChannelSimulator<?>> connectedListC;
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105
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106 ServerData(InetSocketAddress ip, ServerChannelSimulator<?> _scs){
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107 IP = ip;
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108 //selector = _selector;
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109 scs = _scs;
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110 connectedListS = new LinkedList<ChannelSimulator<?>>();
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111 connectedListC = new LinkedList<ChannelSimulator<?>>();
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112 }
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113 } |
