/// <summary>
/// Settings für HierarchieServer.
/// </summary>
/// <param name="isRoot"></param>
public static void HierarchieSettings(bool isRoot)
{
ServerConfig.structure = Structure.HIERARCHY;
Console.WriteLine("HierarchieSettings");
if (isRoot)
{
ServerConfig.host = KnownServers.Root; // <- Sollte nur noch in KnownServers geändert werden
ServerConfig.serverID = 1;
}
else
{
while (true)
{
Console.WriteLine("Stimmt die Adresse von Root? [Y/N]");
Console.WriteLine(KnownServers.Root);
char answer;
do
{
answer = (char)Console.Read();
} while (!"YyJjNn".Contains(answer));
if ("Nn".Contains(answer))
{
do
{
Console.WriteLine("Bitte eine valide IPv4 Adresse für Root angeben.");
} while (!IPAddress.TryParse(Console.ReadLine(), out KnownServers.Root));
}
//read = Console.ReadLine();
Package package = new Package
{
sourceServer = ServerConfig.host.ToString(),
hierarchie = new HierarchiePackage()
};
package.hierarchie.HierarchieRequest = HierarchieRequest.NewServer;
package = ServerLogic.Send(package, KnownServers.Root);
if (package != null)
{
Console.WriteLine("Packet ist angekommen");
//Logic
Console.WriteLine("Adresse: " + package.hierarchie.destinationAdress);
//Zu wem muss ich mich verbinden? bzw. Registrieren
package.hierarchie.HierarchieRequest = HierarchieRequest.RegisterServer;
package.hierarchie.sourceAdress = ServerConfig.host.ToString();
Console.WriteLine("Verbindung zum Server aufbauen? Y");
Console.ReadLine();
IPAddress connectServer = IPAddress.Parse(package.hierarchie.destinationAdress);
Package receive;
while (true)
{
try
{
receive = ServerLogic.Send(package, connectServer);
Thread.Sleep(1000);
break;
}
catch (Exception ex)
{
Console.WriteLine("Es gab ein Problem. Y fuer nochmal");
Console.ReadLine();
Console.WriteLine(ex);
}
}
if (receive != null)
{
Console.WriteLine("SourceID: " + receive.hierarchie.sourceID);
ServerConfig.serverID = receive.hierarchie.sourceID;
ServerLogic.database.NewServerEntry(receive.hierarchie.destinationAdress, receive.hierarchie.destinationID);
Console.WriteLine("Adresse: " + receive.hierarchie.destinationAdress);
Console.WriteLine("ID: " + receive.hierarchie.destinationID);
break;
}
else
{
Console.WriteLine("Server antwortet nicht richtig, Root nochmal fragen");
}
}
else
{
Console.WriteLine("Server nicht verfügbar oder irgendwas ist schief gelaufen");
}
}
}
}
/// <summary>
/// Settings für P2PServer. Zugehöriigkeit WellKnownPeers usw.
/// </summary>
/// <param name="isWellKnown"></param>
public static void P2PSettings(bool isWellKnown)
{
while (CheckWellKnownPeers())
{
;
}
if (isWellKnown)
{
//Data.ServerConfig.ListofWellKnown.Add(Data.ServerConfig.host);
foreach (IPAddress ipAddress in KnownServers.ListofWellKnownPeers)
{
if (ipAddress.ToString() != ServerConfig.host.ToString())
{
Package package = new Package
{
p2p = new P2PPackage()
};
package.p2p.P2Prequest = P2PRequest.RegisterServer;
package.p2p.SetOriginIPAddress(ServerConfig.host.ToString());
Package receive = ServerLogic.Send(package, ipAddress);
//Nur hinzufügen wenn noch nicht existent
if (receive != null && !ServerConfig.neighbours.Exists(x => x.ToString() == ipAddress.ToString()))
{
ServerConfig.neighbours.Add(ipAddress);
}
}
}
}
else
{ //This only functions if we have two or more Well Known Peers
for (int i = 2; i > 0; i--) //'i' represents number of connections to create.
{
Package package = new Package
{
p2p = new P2PPackage
{
P2Prequest = P2PRequest.NewServer
},
sourceServer = ServerConfig.host.ToString()
};
package.p2p.SetOriginIPAddress(ServerConfig.host.ToString());
package = ServerLogic.Send(package, KnownServers.GetRandomWellKnownPeer());
if (package != null)
{
//2 Server mit denen ich mich verbinde und bei denen Registriere
switch (package.p2p.P2PAnswer)
{
case P2PAnswer.Error:
Console.WriteLine(package.p2p.ErrorMsg);
break;
case P2PAnswer.Failure:
Console.WriteLine(NewServerFail);
break;
default:
Package registerPackage = new Package
{
p2p = new P2PPackage
{
P2Prequest = P2PRequest.RegisterServer
},
sourceServer = ServerConfig.host.ToString()
};
registerPackage.p2p.SetOriginIPAddress(ServerConfig.host.ToString());
registerPackage = ServerLogic.Send(registerPackage, IPAddress.Parse(package.p2p.lastIP));
if (registerPackage != null)
{
switch (registerPackage.p2p.P2PAnswer)
{
case P2PAnswer.Success:
ServerConfig.neighbours.Add(IPAddress.Parse(package.p2p.lastIP));
Console.WriteLine(RegisterServerSuccess);
break;
case P2PAnswer.Visited:
break;
default:
Console.WriteLine(RegisterServerFail);
break;
}
}
else
{
Console.WriteLine(SendError);
}
break;
}
}
else
{
Console.WriteLine(SendError);
}
}
}
if (ServerConfig.neighbours.Count == 0)
{
Console.WriteLine(SetupFailed);
}
else if (ServerConfig.neighbours.Count < 2)
{
Console.WriteLine(SetupIncomplete);
}
else
{
Console.WriteLine(SetupComplete);
}
}
/// <summary>
/// Paketauflösung in einem HierarchieNetz.
/// </summary>
/// <param name="package"></param>
/// <returns></returns>
public static HierarchiePackage ResolveHierarchie(HierarchiePackage package)
{
int anzConnection = ServerLogic.database.GetServerCount();
string ip = ServerConfig.host.ToString();
int id = ServerConfig.serverID;
switch (package.HierarchieRequest)
{
case HierarchieRequest.Invite:
//Ab hier soll man wissen, an WEN ES GEHEN SOLL UND MUSS!
if (package.destinationID != ServerConfig.serverID)
{
sendHierarchie(getAdress(package.destinationID), ToDo.Send, null);
}
else
{
//TO FIX: Schau erstmal nach ob der User existiert
if (ServerLogic.database.UserExist(package.login))
{
ServerLogic.database.SaveInvites(package.login, package.invite);
package.HierarchieAnswer = HierarchieAnswer.Success;
}
else
{
// TO FIX: User existiert nicht?
}
}
break;
case HierarchieRequest.NewServer:
if (anzConnection > 0)
{
//Eigene Send funktion machen
//Auch parallel
//sendHierarchie();
Console.WriteLine("Auf der SUche nach einem passenden Server");
StateEintrag stateEintrag = new StateEintrag();
List <HierarchiePackage> child = new List <HierarchiePackage>();
stateEintrag.SetCounter(ServerLogic.database.GetServerCount());
int childcount = 0;
for (int i = 0; i < ServerLogic.database.GetServerCount(); i++)
{
Console.WriteLine("Dieser Server hat Kinder");
int childID = ServerConfig.serverID * 10 + 1 - i; //Weil HierarchieID's!
if (ServerLogic.database.ServerExist(childID))
{
try
{
child.Add(sendHierarchie(getAdress(childID), ToDo.Info, stateEintrag));
childcount++;
}
catch (Exception)
{
Console.WriteLine("Etwas ist schief gelaufen beim KindServer");
}
}
}
//wartet auf die anderen. hoffentlich
//stateEintrag.wait();
if (childcount != 1) // wenn der Server nur ein Kind hat, so hat er das Sorgerecht für das Kind
{
//Wenn überhaupt was reingebracht wurde
if (child.Count > 0)
{
foreach (HierarchiePackage c in child)
{
//wenn zuverlässigerweise was schief gelaufen ist, wird das ignoriert
if (c != null)
{
if (c.anzConnection <= anzConnection)
{
anzConnection = c.anzConnection;
ip = c.destinationAdress;
id = c.destinationID;
}
}
}
}
}
}
package.destinationID = id;
package.destinationAdress = ip;
package.anzConnection = anzConnection;
//Muss ich weiterleiten an die Unter mir? oder Nicht? entsprechende Antwort schicken
break;
case HierarchieRequest.RegisterServer:
//Sollte immer durch newServer abgefragt werden!
Console.WriteLine("Ein neuer Servereintrag. bzw. Child");
int newId = ServerConfig.serverID * 10;
//if (Data.ServerConfig.host == Data.ServerConfig.root)
//{
// newId += 10;
//}
//if (database.getServerCount() == 0)
//{
// newId += 1;
//}
if (!ServerLogic.database.ServerExist(newId + 1))
{
newId += 1;
}
package.sourceID = newId;
ServerLogic.database.NewServerEntry(package.sourceAdress, newId);
break;
case HierarchieRequest.RegisterUser:
int anzUser = ServerLogic.database.GetUserCount();
//überprüfen ob USERNAME schon existiert!
if (ServerLogic.database.UserExist(package.login))
{
package.HierarchieAnswer = HierarchieAnswer.UserExistent;
break;
}
else if (anzConnection > 0)
{
//Eigene Send funktion machen
//Soll parallel ablaufen
//sendHierarchie();
StateEintrag stateEintrag = new StateEintrag();
List <HierarchiePackage> child = new List <HierarchiePackage>();
stateEintrag.SetCounter(ServerLogic.database.GetServerCount());
for (int i = 0; i < 2; i++)
{
int childID = (ServerConfig.serverID * 10) + 1 - i; //Weil HierarchieID's!
if (ServerLogic.database.ServerExist(childID))
{
child.Add(sendHierarchie(getAdress(childID), ToDo.Info, stateEintrag));
}
}
//wartet auf die anderen. hoffentlich
if (child.Count > 0)
{
child = stateEintrag.child;
foreach (HierarchiePackage c in child)
{
if (c != null)
{
if (c.anzUser <= anzUser)
{
anzUser = c.anzUser;
ip = c.destinationAdress;
id = c.destinationID;
}
}
}
}
}
package.destinationID = id;
package.destinationAdress = ip;
package.anzUser = anzUser;
package.HierarchieAnswer = HierarchieAnswer.Success;
break;
case HierarchieRequest.UserLogin:
if (package.destinationID == id)
{
if (ServerLogic.database.UserExist(package.login))
{
package.destinationAdress = ServerConfig.host.ToString();
package.HierarchieAnswer = HierarchieAnswer.Success;
}
else
{
package.HierarchieAnswer = HierarchieAnswer.Failure;
}
}
else
{
package = sendHierarchie(getAdress(package.destinationID), ToDo.Send, null);
}
break;
default:
break;
}
string getAdress(int ask)
{
int numberask = GetDigitCount(ask);
int numberid = GetDigitCount(id);
bool isUp = false;
int child = 0;
if (numberid >= numberask)
{
isUp = true;
}
else
{
int dif = (int)(numberask - numberid);
int level = (int)(ask / Math.Pow(10, dif));
//Bin ich das?
if (level != id)
{
isUp = true;
}
else
{
child = (int)(ask / Math.Pow(10, dif - 1));
}
}
int addressid = id;
if (isUp)
{
addressid /= 10;
}
else
{
addressid = child;
}
return(ServerLogic.database.GetServer(addressid));
}
int GetDigitCount(int number)
{
if (number != 0)
{
double baseExp = Math.Log10(Math.Abs(number));
return(Convert.ToInt32(Math.Floor(baseExp) + 1));
}
else
{
return(1);
}
}
HierarchiePackage sendHierarchie(string ipadress, ToDo _toDo, StateEintrag state)
{
Package hierarchie = new Package
{
hierarchie = package
};
//An beide Childs
if (_toDo == ToDo.Info)
{
hierarchie = ServerLogic.Send(hierarchie, IPAddress.Parse(ipadress));
state.DecrementCounter();
state.child.Add(hierarchie.hierarchie);
}
else if (_toDo == ToDo.Send) //nur an einer gewissen Server
{
hierarchie = ServerLogic.Send(hierarchie, IPAddress.Parse(ipadress));
}
return(hierarchie.hierarchie);
}
return(package);
}
/// <summary>
/// Das Handling von P2PPaketen.
/// </summary>
/// <param name="package"></param>
/// <returns></returns>
public static P2PPackage ResolveP2P(P2PPackage package)
{
if (ServerConfig.CheckPackageID(package.GetPackageID()))
{
try
{
List <P2PPackage> returnList;
switch (package.P2Prequest)
{
case P2PRequest.NewServer:
//0. Falls ich ihn noch nicht als Nachbarn habe.
if (!ServerConfig.neighbours.Exists(x => x.ToString() == package.GetSource()))
{
//1. Anzahl Verbindungen (s. neighbours)
if (package.anzConn == P2PPackage.AnzConnInit || package.anzConn > ServerConfig.neighbours.Count)
{ //Wenn das Paket noch nicht angefasst wurde, oder wir ein mind. genausogutes Angebot haben geht es als Antwort zurück.
package.anzConn = ServerConfig.neighbours.Count;
package.lastIP = ServerConfig.host.ToString();
}
else if (package.anzConn == ServerConfig.neighbours.Count)
{
package.lastIP = ServerConfig.host.ToString();
}
}
//2. Test on TTL
if (package.DecrementTTL() == 0)
{
package.P2PAnswer = P2PAnswer.Timeout;
break;
}
//3. Forking to other servers via flooding
returnList = Forward();
//Comparing answers
foreach (P2PPackage p in returnList)
{
if (p.P2PAnswer == P2PAnswer.Error)
{
package.ErrorMsg = GenerateErrorString();
/*package.Exception = p.Exception;*/
}
else if (package.anzConn >= p.anzConn)
{
package.anzConn = p.anzConn;
package.lastIP = p.lastIP;
}
}
break;
case P2PRequest.RegisterServer:
//1. Nimm Server in neighbours auf. (Falls noch nicht existent)
if (!ServerConfig.neighbours.Exists(x => x.ToString() == package.GetSource()))
{
ServerConfig.neighbours.Add(IPAddress.Parse(package.GetSource()));
package.P2PAnswer = P2PAnswer.Success;
}
else
{
package.P2PAnswer = P2PAnswer.Visited;
}
break;
case P2PRequest.NewUser:
//0. Existiert der User?
if (ServerLogic.database.UserExist(package.GetUsername()))
{
package.P2PAnswer = P2PAnswer.UserExistent;
break;
}
//1. Anzahl User
int anzUser = ServerLogic.database.GetUserCount();
if (package.anzUser == P2PPackage.AnzUserInit || package.anzUser > anzUser)
{ // siehe case NewServer
package.anzUser = anzUser;
package.lastIP = ServerConfig.host.ToString();
}
else if (package.anzUser == anzUser)
{
package.lastIP = ServerConfig.host.ToString();
}
//2. Test on TTL ???? -> Nein! Nicht vereinbar mit nur einem User im gesamten Netz.
/*if (package.DecrementTTL() == 0)
* {
* package.P2PAnswer = P2PAnswer.Timeout;
* break;
* }*/
//3. Forking to other servers via flooding
returnList = Forward();
//Comparing answers
foreach (P2PPackage p in returnList)
{
if (p.P2PAnswer == P2PAnswer.Error)
{
package.ErrorMsg = p.ErrorMsg;
/*package.Exception = p.Exception;*/
package.P2PAnswer = P2PAnswer.Error;
return(package);
}
else if (package.anzUser >= p.anzUser)
{
package.anzUser = p.anzUser;
package.lastIP = p.lastIP;
}
}
package.P2PAnswer = P2PAnswer.Success;
break;
/*
* case P2PRequest.RegisterUser:
* //Client should connect directly to register.
* break;
*/
case P2PRequest.Login:
//1. Check Datenbank nach user
if (!ServerLogic.database.UserExist(package.GetUsername())) //2. Wenn nicht gefunden => weiterleiten
{
returnList = Forward();
//Falls nur ein return => Success
if (returnList.Count == 1)
{
package.P2PAnswer = returnList.First().P2PAnswer;
package.lastIP = returnList.First().lastIP;
}
else if (returnList.Count > 1)
{
foreach (P2PPackage p in returnList)
{
if (p.P2PAnswer == P2PAnswer.Success)
{
package.lastIP = p.lastIP;
}
}
}
else
{
package.P2PAnswer = P2PAnswer.Failure; //Error?
}
}
else
{
package.lastIP = ServerConfig.host.ToString();
package.P2PAnswer = P2PAnswer.Success;
}
break;
case P2PRequest.Invite:
//1. Check Datenbank nach user
if (!ServerLogic.database.UserExist(package.GetUsername())) //2. Wenn nicht gefunden => weiterleiten
{
returnList = Forward();
foreach (P2PPackage p in returnList)
{
if (p.P2PAnswer == P2PAnswer.Success)
{
package.P2PAnswer = p.P2PAnswer;
package.lastIP = p.lastIP;
}
}
}
else
{
ServerLogic.database.SaveInvites(package.GetUsername(), package.GetInvite());
package.lastIP = ServerConfig.host.ToString();
package.P2PAnswer = P2PAnswer.Success;
}
break;
default:
break;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
package.P2PAnswer = P2PAnswer.Error;
package.ErrorMsg = GenerateErrorString(ex);
/*package.Exception = ex;*/
//throw;
}
}
else
{
package.P2PAnswer = P2PAnswer.Visited; //Node wurde bereits angefragt, keine Aktion nötig
}
return(package);
List <P2PPackage> Forward()
{
Package sendPackage = new Package(package);
Package recievePackage;
List <P2PPackage> returnList = new List <P2PPackage>();
foreach (IPAddress iPAddress in ServerConfig.neighbours)
{
recievePackage = ServerLogic.Send(sendPackage, iPAddress);
if (recievePackage != null)
{
if (recievePackage != null && recievePackage.p2p.P2PAnswer == P2PAnswer.Success)
{
return new List <P2PPackage>()
{
recievePackage.p2p
}
}
;
returnList.Add(recievePackage.p2p);
}
}
return(returnList);
}
}