private void receiveFileFromPeer(peerClient thisPeer, String fileName)
{
String completePathOfFile = Folder + "\\" + fileName;
if (File.Exists(completePathOfFile))
{
File.Delete(completePathOfFile);
}
/*creating new file.*/
Stream dest = File.OpenWrite(completePathOfFile);/*ye received file is client k apne folder me save hogi.*/
listBox1.Items.Add("receiving file '" + fileName + "' from the peer " + thisPeer.Port + "...");
while (true)
{
byte[] buffer = new byte[1500000];
int msgLength = thisPeer.Connector.Receive(buffer, 0, buffer.Length, 0);
if (getActualMessage(buffer, msgLength) == "file completed")
{
listBox1.Items.Add("File received successfully, and saved in your folder.");
dest.Close(); /*file completely received, so closes the file so that file will be completely received.
* aur phir is peer se normal messages receive krne shuru kar dein ge.*/
thisPeer.receiveStatus = ""; /*ab dubara normal messages receive karein ge.*/
return; /*returning from this function to normally receiving messages state from this peer.*/
}
char[] chars = new char[msgLength];
Encoding.Default.GetDecoder().GetChars(buffer, 0, msgLength, chars, 0);
dest.Write(buffer, 0, msgLength);/*buffer me se 0th index se msgLength tak ka sara data 'dest' ki current
* position (end) per write (append) kar dena he.*/
}
}
void sendFileToPeerIfItAAccepts(peerClient p1, String sourcefileCompleteNameWithPath)
{
sendBtn.Enabled = false;
downloadBtn.Enabled = false;
p1.sendStatus = "*";
while (p1.sendStatus == "*")
{
;
}
if (p1.sendStatus == "1")
{
/*this peer accepts the file, and I will send the file to it.*/
p1.Connector.SendFile(sourcefileCompleteNameWithPath);
Thread.Sleep(75);
p1.Connector.Send(Encoding.Default.GetBytes("file completed"));
listBox1.Items.Add("File sent successfully");
}
else/*p1.sendStatus == ""*/
{
listBox1.Items.Add("File is rejected by peer " + p1.Port);
}
p1.sendStatus = "";
sendBtn.Enabled = true;/*ab me koi aur file bi send kar sakta hu.*/
downloadBtn.Enabled = true;
}
return(new HastingDiscoveryTest(logger,
peerRepository,
peerSettings,
dns,
peerClient,
peerMessageCorrelationManager,
cancellationTokenProvider,
peerClientObservables,
autoStart,
peerDiscoveryBurnIn,
state,
hastingsCareTaker,
millisecondsTimeout,
hasValidCandidatesCheckMillisecondsFrequency,
scheduler));
private void continuouslyListeningNewPeers()
{
while (true)
{
try{
Listener.Listen(0);/*setting that only 1 new client can come in one time.*/
Socket temp = Listener.Accept();
listBox1.Items.Add("New peer connected.");
peerClient newPeer = new peerClient();
newPeer.Connector = temp;
temp = null;
peer.Add(newPeer);
Thread newThread2 = new Thread(() => continuouslyReceivingMessagesFromThisPeer(newPeer));
newThread2.IsBackground = true;
newThread2.Start();
}
catch (Exception ex) { MessageBox.Show(ex.Message); }
}
}
private void ConnectToDestinPeer()
{
try{
/*destination peer k sath directly connect krna he.*/
String destinationPeer = destinPortNo.Text;
peerClient newPeer = new peerClient();
/*separating destination IP, and port to connect to destination peer directly.*/
newPeer.IP = destinationPeer.Substring(0, destinationPeer.IndexOf(":"));
newPeer.Port = Convert.ToInt32(destinationPeer.Substring(destinationPeer.IndexOf(':') + 1));
for (int i = 0; i < peer.Count(); i++)
{
if (peer[i].IP == newPeer.IP && peer[i].Port == newPeer.Port)
{
/*I am already connected to destin. peer, tu me dobara is k sath
* connection establish nai karu ga.*/
listBox1.Items.Add("Already Connected to peer " + newPeer.Port);
setConnectedToDestinPeerState();
destinPeer.SelectedIndex = destinPeer.FindStringExact(newPeer.Port.ToString());
newPeer = null;
return;
}
}
listBox1.Items.Add("Connecting to peer:" + newPeer.Port);
newPeer.Connector.Connect(new IPEndPoint(IPAddress.Parse(newPeer.IP), newPeer.Port));
peer.Add(newPeer);/*adding a new peer in the peers list.*/
listBox1.Items.Add("Connected to the peer : " + newPeer.Port);
setConnectedToDestinPeerState();
destinPeer.Items.Add(newPeer.Port);
destinPeer.SelectedIndex = destinPeer.FindStringExact(newPeer.Port.ToString());
/*now receiving messages from this peer continuously in this thread.*/
Thread newThread2 = new Thread(() => continuouslyReceivingMessagesFromThisPeer(newPeer));
newThread2.IsBackground = true;
newThread2.Start();
newPeer.Connector.Send(Encoding.Default.GetBytes("My address is:" + meIP + "_" + mePort));
}
catch (Exception ex) { MessageBox.Show(ex.Message); }
}
private void continuouslyReceivingMessagesFromThisPeer(peerClient thisPeer)
{
while (true)
{
try{
byte[] buffer = new byte[1500];/*maximum aik packet ka size 1500 hoga.*/
int msgLength = thisPeer.Connector.Receive(buffer, 0, buffer.Length, 0);
thisPeer.message = getActualMessage(buffer, msgLength);
if (thisPeer.message.Contains("I need this file from you:"))
{
/*this peer is requesting for some file from me.*/
String fileName = thisPeer.message.Substring(thisPeer.message.IndexOf(':') + 1);
if (File.Exists(Folder + "\\" + fileName))
{
thisPeer.Connector.Send(Encoding.Default.GetBytes("Ok, I am gonna sending you this file:" + fileName));
/*asking destin peer that Can I send you this file, having size 'fileSizeInBytes' bytes, and waiting for ack.*/
listBox1.Items.Add("Sending this file '" + fileName + "' to peer : " + thisPeer.Port + "...");
Thread t1 = new Thread(() => sendFileToPeerIfItAAccepts(thisPeer, Folder + "\\" + fileName));
t1.IsBackground = true;
t1.Start();
}
else
{
thisPeer.Connector.Send(Encoding.Default.GetBytes("I don`t have this file"));/*me us peer ko -ve ack bhej raha hu, k mere paas ye file nai he.*/
}
}
else if (thisPeer.message.Contains("Ok, I am gonna sending you this file:"))
{
/*me ne us peer ko file ki request ki thi, tu us peer ne ab kaha he, k us k paas file he, aur wo
* peer muje file send krne laga he, tu muje ab ye file zaroor accept krni hogi, kiu k download krne k liay
* koi prompt nai hota, balke +ve ack hi jae gi.*/
String fileName = thisPeer.message.Substring(thisPeer.message.IndexOf(':') + 1);
thisPeer.receiveStatus = "*";
Thread.Sleep(50);
thisPeer.Connector.Send(Encoding.Default.GetBytes("Yes, send this file to me"));/*telling to the peer that OK, ye wali file 'fileName' muje
* send kar do, aur me is file ko receive kar lu ga.*/
thisPeer.receiveStatus = "1";
receiveFileFromPeer(thisPeer, fileName);
thisPeer.receiveStatus = "";
}
else if (thisPeer.message == "I don`t have this file")
{
thisPeer.receiveStatus = "";
}
else if (thisPeer.message == "Yes, send this file to me")
{
thisPeer.sendStatus = "1";
}
else if (thisPeer.message == "No, don`t send this file to me")
{
thisPeer.sendStatus = "";
}
else if (thisPeer.message.Contains("My address is:"))
{
/*receive message from thisPeer about his ip:port, so I save it.*/
String extractedMsg = thisPeer.message.Substring(thisPeer.message.IndexOf(':') + 1);
String IP = extractedMsg.Substring(0, extractedMsg.IndexOf("_"));
int Port = Convert.ToInt32(extractedMsg.Substring(extractedMsg.IndexOf('_') + 1));
for (int i = 0; i < peer.Count(); i++)
{
/*kya ye peer pehle se exist krta he?*/
if (peer[i].Port == Port)
{
listBox1.Items.Add(thisPeer.Port + " peer already connected.");
peer.Remove(thisPeer);
return;
}
}
thisPeer.IP = IP;
thisPeer.Port = Port;
listBox1.Items.Add("Connected to the peer : " + thisPeer.Port);
sendBtn.Enabled = true;
downloadBtn.Enabled = true;
destinPeer.Items.Add(thisPeer.Port);
destinPeer.SelectedIndex = destinPeer.FindStringExact(thisPeer.Port.ToString());
}
else if (thisPeer.message.Contains("Can I send this file to you:"))
{
String fileName = thisPeer.message.Substring(thisPeer.message.IndexOf(':') + 1);
thisPeer.receiveStatus = "*";/*I get notification to accept/reject the file that`s name received from peer.*/
DialogResult dialogResult = MessageBox.Show("Do you want to save the file '" + fileName + "' ", "New File received from the peer " + thisPeer.Port, MessageBoxButtons.YesNo);
if (dialogResult == DialogResult.Yes)
{
thisPeer.Connector.Send(Encoding.Default.GetBytes("Yes, send this file to me"));/*telling to the peer that OK, ye wali file 'fileName' muje
* send kar do, aur me is file ko receive kar lu ga.*/
thisPeer.receiveStatus = "1";
receiveFileFromPeer(thisPeer, fileName);
}
else
{
thisPeer.Connector.Send(Encoding.Default.GetBytes("No, don`t send this file to me"));/*(-ve ack) telling to the peer that do not send me this file 'filename'*/
}
thisPeer.receiveStatus = "";
/*is peer se agar ye file completely acctepted/rejected ho gai he, tu phir dubara ham normal messages ko receive karein ge.*/
}
else
{
listBox1.Items.Add("Peer " + thisPeer.Port + " : " + thisPeer.message);
}
}
catch (Exception ex)
{
listBox1.Items.Add(thisPeer.Port + " peer left");
peer.Remove(thisPeer);
return;/*no more this peer alive, so we close accpting things from it.*/
}
}
}
