// Handling the routing table request
public void handleRequestClosest(IPEndPoint remotePoint, int sender, int target)
{
PeerInfo targetInfo = askForClosestPeer(sender, target);
UDPResponder responder = new UDPResponder(remotePoint, remotePoint.Port);
responder.sendClosest(target, targetInfo);
}
private void sendLeaveRequest(PeerInfo pInfo)
{
listener.closeSocket();
IPEndPoint remotePoint = new IPEndPoint(IPAddress.Parse(pInfo.getIP()), pInfo.getPORT());
UDPResponder responder = new UDPResponder(remotePoint, myInfo.getPORT());
responder.sendRequestLeave(myInfo.getGUID);
}
public void replace(int targetGuid, PeerInfo p)
{
if (!containsValue(p))
{
PeerInfo temp = table[targetGuid];
table.Remove(targetGuid);
table.Add(targetGuid, p);
addIfCloser(temp);
}
}
private void btnSendFile_Click(object sender, EventArgs e)
{
string guid;
guid = listRoutingTable.SelectedValue.ToString();
Console.WriteLine(guid);
OpenFileDialog ofd = new OpenFileDialog();
DialogResult dr = ofd.ShowDialog();
if (dr != DialogResult.OK)
{
// no file was selected
return;
}
string fileFullPath = ofd.FileName;
string fileName = Path.GetFileName(fileFullPath);
// get ip and port from selected peer in listbox
int index = listRoutingTable.SelectedIndex;
// find the guid of the peer selected
//string selectedPeer = listRoutingTable.Items[index].ToString();
if (index == -1)
{
toolStatus.Text = "Error: No peer selected!";
return;
}
Dictionary <int, PeerInfo> peerDictionary = peer.getRoutingTable.getPeers();
// FIX FOR MONDAY
// Will loop through peerDictonary and send to the first one it finds..
for (int i = 0; i < 12; i++)
{
if (peerDictionary.ContainsKey(i) && peer.getGUID != i)
{
PeerInfo receivingPeer = peerDictionary[i];
toolStatus.Text = String.Format("Sending file \"{0}\" to peer guid {1}, ip {2}:{3}", fileName, receivingPeer.getGUID, receivingPeer.getIP(), receivingPeer.getPORT());
IPAddress RecevingIp = IPAddress.Parse(receivingPeer.getIP());
//// Send file info
//// create end point
IPEndPoint remotePoint = new IPEndPoint(RecevingIp, receivingPeer.getPORT());
UDPResponder udpResponse = new UDPResponder(remotePoint, listenPort);
udpResponse.sendFileInfo(fileFullPath);
return;
}
}
}
public void add(PeerInfo p)
{
if (table.ContainsKey(p.getGUID))
{
replace(p.getGUID, p);
}
else
{
table.Add(p.getGUID, p);
}
}
// Handling receive routing table request
public void handleReceiveClosest(int guid, PeerInfo currentClosest)
{
routingTable.cleanTable(myInfo.getGUID);
foreach (SearchChannel c in channels)
{
if (guid == c.getTargetGUID())
{
c.onReceiveClosest(currentClosest);
}
}
}
public void remove(int guid)
{
foreach (KeyValuePair <int, PeerInfo> entry in table)
{
PeerInfo p = entry.Value;
if (p.getGUID == guid)
{
table.Remove(entry.Key);
break;
}
}
}
public string toString()
{
string result = "";
int count = 0;
foreach (KeyValuePair <int, PeerInfo> entry in table)
{
PeerInfo p = entry.Value;
result += count + ": " + p.toString + "\n";
count++;
}
return(result);
}
public bool containsValue(PeerInfo peer)
{
List <PeerInfo> list = new List <PeerInfo>(table.Values);
// Loop through list
foreach (PeerInfo p in list)
{
if (p.getGUID == peer.getGUID)
{
return(true);
}
}
return(false);
}
public PeerInfo findClosestFor(int senderGUID, int Target)
{
PeerInfo closest = myInfo;
int target = Target;
foreach (KeyValuePair <int, PeerInfo> entry in table)
{
PeerInfo p = entry.Value;
if (calculateXOR(p.getGUID, target) < calculateXOR(closest.getGUID, target) && senderGUID != p.getGUID)
{
closest = p;
}
}
return(closest);
}
// Handling the routing table request
public void handleJoinRequest(int targetGuid, PeerInfo newPeer)
{
List <int> targets = routingTable.getTargetGUIDs(myInfo.getGUID);
if (targets.Contains(newPeer.getGUID))
{
routingTable.add(newPeer);
}
else if (!routingTable.containsValue(newPeer))
{
routingTable.addIfCloser(newPeer);
}
routingTable.cleanTable(myInfo.getGUID);
updateTable();
}
public bool addIfCloser(PeerInfo p)
{
List <int> targets = getTargetGUIDs(myInfo.getGUID);
List <int> closerToIndex = new List <int>();
bool added = false;
foreach (int tar in targets)
{
if (table.ContainsKey(tar))
{
PeerInfo current = table[tar];
if (calculateXOR(p.getGUID, tar) < calculateXOR(current.getGUID, tar))
{
closerToIndex.Add(tar);
}
}
else
{
closerToIndex.Add(tar);
}
}
int index = -1;
int dist = -1;
foreach (int closer in closerToIndex)
{
if (dist == -1 || calculateXOR(p.getGUID, closer) < dist)
{
index = closer;
dist = calculateXOR(p.getGUID, closer);
}
}
if (index != -1)
{
added = true;
if (table.ContainsKey(index))
{
replace(index, p);
}
else
{
table.Add(index, p);
}
}
return(added);
}
// Finds closest GUIDs and searches for closest peers to them in the network
private void searchTargetPeers()
{
List <int> targetGUIDs = routingTable.getTargetGUIDs(myInfo.getGUID);
foreach (int guid in targetGUIDs)
{
PeerInfo closest = routingTable.findClosest(guid);
if (closest != null && myInfo.getGUID != closest.getGUID)
{
//routingTable.remove(closest.getGUID);
SearchChannel channel = new SearchChannel(this, guid);
channel.onReceiveClosest(closest);
channels.Add(channel);
}
}
}
public PeerInfo findClosest(int targetGUID)
{
PeerInfo closest = null;
int target = targetGUID;
foreach (KeyValuePair <int, PeerInfo> entry in table)
{
PeerInfo p = entry.Value;
if (closest == null)
{
closest = p;
}
else if (calculateXOR(p.getGUID, target) < calculateXOR(closest.getGUID, target))
{
closest = p;
}
}
return(closest);
}
public void init(int guid, string ip, int port)
{
myInfo = new PeerInfo(guid, ip, port);
// Create UDP listen and add events
listener = new UDPListener(port);
subscribeToListener(listener);
// Create Routing Table and adding boot peer
routingTable = new RoutingTable(myInfo);
routingTable.add(bootPeer);
listener.setRoutingtable = routingTable;
// Create EndPoint
IPEndPoint remotePoint = new IPEndPoint(IPAddress.Parse(bootPeer.getIP()), bootPeer.getPORT());
// Sending routing table request
UDPResponder responder = new UDPResponder(remotePoint, port);
responder.sendRequestRoutingTable();
}
public void addPeerInfo(PeerInfo pInfo)
{
List <int> targets = routingTable.getTargetGUIDs(myInfo.getGUID);
if (targets.Contains(pInfo.getGUID))
{
routingTable.add(pInfo);
IPEndPoint remotePoint = new IPEndPoint(IPAddress.Parse(pInfo.getIP()), pInfo.getPORT());
UDPResponder responder = new UDPResponder(remotePoint, myInfo.getPORT());
responder.sendRequestJoin(1, myInfo);
}
else if (!routingTable.containsValue(pInfo))
{
bool added = routingTable.addIfCloser(pInfo);
if (added)
{
IPEndPoint remotePoint = new IPEndPoint(IPAddress.Parse(pInfo.getIP()), pInfo.getPORT());
UDPResponder responder = new UDPResponder(remotePoint, myInfo.getPORT());
responder.sendRequestJoin(1, myInfo);
}
}
routingTable.cleanTable(myInfo.getGUID);
updateTable();
}
public RoutingTable(PeerInfo myInfo)
{
table = new Dictionary <int, PeerInfo>();
this.myInfo = myInfo;
}
// TODO: pass boot peer after retrieval of peers from servers
public Peer()
{
channels = new List <SearchChannel>();
bootPeer = new PeerInfo(0, "145.93.116.180", 8080);
}