public void run() {
// variables
int randomTime, i;
Stopwatch timer = new Stopwatch();
// start simulation
running = true;
timer.start();
while ((timer.elapsedTime() * 1000) < this.runtime) {
// request packets from the internet at random times (1-30 sec)
randomTime = AccessPoint.randInt(1000, 3200);
// request a series of packets from random webpage
for (i = 0; i < AccessPoint.randInt(1, 10); i++) {
RequestFromInternet();
}
// delay
try {
Thread.sleep(randomTime);
} catch (InterruptedException e) {
}
}
running = false;
}
public void RequestFromInternet() {
// load frame and header with information
Frame frame = new Frame();
frame.loadNetworkData("request for webpage from " + Websites.getRandom() + ".com");
frame.macHeader.sourceMAC = this.MAC;
frame.macHeader.destinationMAC = this.AP.getMAC();
frame.setAssociatedDevice(this);
frame.size = 20 + frame.networkData.length();
// "sense" the channel to see if it's in use
while (AP.channel_2G.inUse) {
// there was a collision so increase counter & wait random amnt of time
MainSimulation.numCollisions++;
try {
Thread.sleep(AccessPoint.randInt(50, 150));
} catch (InterruptedException e) {
}
}
// send request frame to the AP
AP.channel_2G.inUse = true;
stopwatch.start();
AP.channel_2G.sendFrameToAP(frame);
try {
Thread.sleep((100 - signalStrength));
} catch (InterruptedException e) {
}
AP.channel_2G.inUse = false;
AP.getRequestedFromInternet();
}
public void receiveAssociationReply(AccessPoint ap, int distance) {
this.AP = ap;
this.metersAwayFromAP = distance;
obstacles = AccessPoint.randInt(0, 2);
getIPFromDHCP();
calculateSignalStrength();
}
public void ReceiveReplyFromInternet() {
// for parsing content in frame
Frame IPdatagram[] = new Frame[4];
int i = 0;
// "sense" the channel to see if it's in use
while (AP.channel_2G.inUse) {
// there was a collision so increase counter & wait random amnt of time
MainSimulation.numCollisions++;
try {
Thread.sleep(AccessPoint.randInt(50, 200));
} catch (InterruptedException e) {
}
}
// receive frames from the access point
AP.channel_2G.inUse = true;
// package frames into IP datagram and send to network layer in wireless device
while (!AP.channel_2G.isEmpty()) {
IPdatagram[i] = AP.channel_2G.getFrameFromAP();
System.out.println(Name + " received " + IPdatagram[i].networkData);
i++;
}
try {
Thread.sleep((100 - signalStrength));
} catch (InterruptedException e) {
}
AP.channel_2G.inUse = false;
updateThroughput(IPdatagram[0].size, stopwatch.elapsedTime());
}
public void getIPFromDHCP() {
// variables
String localIP = AP.getLocalIP();
int num;
String tokens[] = localIP.split("\\.");
// look for last number
num = Integer.parseInt(tokens[3]);
num++;
num += AP.getLocationInAP(this) + 1;
tokens[3] = "" + num;
// set new local ip
this.localIPaddress = tokens[0] + '.' + tokens[1] + '.' + tokens[2] + '.' + tokens[3];
// set public ip
this.publicIPaddress = AP.getPublicIP();
}
public WirelessDevice(String name) {
this.Name = name;
this.AP = null;
this.MAC =
Integer.toHexString(AccessPoint.randInt(0, 255))
+ "-"
+ Integer.toHexString(AccessPoint.randInt(0, 255))
+ "-"
+ Integer.toHexString(AccessPoint.randInt(0, 255))
+ "-"
+ Integer.toHexString(AccessPoint.randInt(0, 255))
+ "-"
+ Integer.toHexString(AccessPoint.randInt(0, 255))
+ "-"
+ Integer.toHexString(AccessPoint.randInt(0, 255));
this.localIPaddress = null;
this.publicIPaddress = null;
this.stopwatch = new Stopwatch();
this.throughput = 0.0;
this.runtime = 0;
running = false;
}
public void sendAssociationReq(AccessPoint ap) {
// System.out.println(Name + " sending association request frame to " + AP.getSSID());
ap.requestConnection(this);
}
