private int GetNextFreeLabel(SNPP first, SNPP second, int index_in_list)
{
bool sendRejectedResponse = false;
//sprawdzamy, czy wgl jest jakas wolna lambda
if (first._availableLabels.Count == 0)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - No free label available in SNPP with id " + first._localID);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - No free label available in SNPP with id " + first._localID);
sendRejectedResponse = true;
}
else if (second._availableLabels.Count == 0)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - No free label available in SNPP with id " + second._localID);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - No free label available in SNPP with id " + second._localID);
sendRejectedResponse = true;
}
if (sendRejectedResponse)
{
return(-1);
}
else
{
if (first._availableLabels.Count < index_in_list)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - No more free label available in SNPP with id " + first._localID);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - No more free label available in SNPP with id " + first._localID);
return(-1);
}
else
{
return(first._availableLabels[index_in_list]);
}
}
}
private void SNPRealise(int dealocationID, int snppID, int connectionID, string sourcePcIpAddress)
{
#region Odszukuje_obiekt_SNPP_o_zadanym_id
SNPP requestedSnpp = null;
for (int i = 0; i < _snppList.Count; i++)
{
if (_snppList[i]._localID == snppID)
{
requestedSnpp = _snppList[i];
break;
}
}
//jeżeli nie ma takiego obiektu to zwróć błąd
if (requestedSnpp == null)
{
//jest jakiś błąd i trzeba to zakomunikować
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR (SnppRealise)- Cannot find the SNPP with ID equals " + snppID);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR (SnppRealise)- Cannot find the SNPP with ID equals " + snppID);
//zwróć odpowiedź negatywną
SignalMessage rejectedMessage = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPRealiseResponse,
General_DestinationIpAddress = sourcePcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = dealocationID,
IsAccepted = false
};
//wyslij wiadomość i wyjdź z metody
SendMessageToPC(rejectedMessage);
return;
}
#endregion
#region Znajduję_SNP_związane_z_connectionID
SNP localSNP = null;
for (int i = 0; i < requestedSnpp._allocatedSNP.Count; i++)
{
if (requestedSnpp._allocatedSNP[i]._connectionID == connectionID)
{
localSNP = requestedSnpp._allocatedSNP[i];
break;
}
}
//jeżeli nie ma to zwróc negatywną odpowiedź
if (localSNP == null)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - Cannot find the SNP with connectionID equals " + connectionID + " in SNPP with ID: " + requestedSnpp._localID);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - Cannot find the SNP with connectionID equals " + connectionID + " in SNPP with ID: " + requestedSnpp._localID);
//wyślij wiadomość odmowną
SignalMessage message = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPRealiseResponse,
General_DestinationIpAddress = sourcePcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = dealocationID,
IsAccepted = false
};
SendMessageToPC(message);
//zakończ działanie metody
return;
}
#endregion
#region Zwolnij_etykiete_i_usun_localSNP
int freeLabel = localSNP._allocatedLabel;
requestedSnpp._availableLabels.Add(freeLabel);
requestedSnpp._allocatedSNP.Remove(localSNP);
#endregion
#region Wyslij_odpowiedź
SignalMessage acceptedMessage = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPRealiseResponse,
General_DestinationIpAddress = sourcePcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = dealocationID,
IsAccepted = true
};
SendMessageToPC(acceptedMessage);
#endregion
}
private void LinkConnectionDealocation(int connectionID, SignalMessage.Pair snpp_id_pair)
{
#region Odnajdywanie_SNPP_i_sprawdzenie_czy_istnieją
//odnajdz pierwszy i drugi SNPP
SNPP first = null;
SNPP second = null;
//wyszukuje pierwszą wartość w liście
for (int i = 0; i < _snppList.Count; i++)
{
if (_snppList[i]._localID == snpp_id_pair.first)
{
first = _snppList[i];
break;
}
}
//jeżeli nie ma takiego elementu to zwróć bład
if (first == null)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
}
else
{
//wyszukuje drugą wartość w liście
for (int i = 0; i < _snppList.Count; i++)
{
if (_snppList[i]._localID == snpp_id_pair.second)
{
second = _snppList[i];
break;
}
}
//jeżeli nie ma takiego elementu to zwróć bład
if (second == null)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
}
}
if (first == null || second == null)
{
SignalMessage rejectedResponse = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.LinkConnectionDealocationResponse,
General_DestinationIpAddress = _localPcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "CC",
IsAccepted = false,
};
SendMessageToPC(rejectedResponse);
//zakończ działanie metody
return;
}
#endregion
#region Znajdź_SNP_związane_z_tym_connectionID
SNP localSNP = null;
for (int i = 0; i < first._allocatedSNP.Count; i++)
{
if (first._allocatedSNP[i]._connectionID == connectionID)
{
localSNP = first._allocatedSNP[i];
break;
}
}
if (localSNP == null)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - Cannot find the SNP with connectionID equals " + snpp_id_pair.first + " in SNPP with ID: " + first._localID);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - Cannot find the SNP with connectionID equals " + snpp_id_pair.first + " in SNPP with ID: " + first._localID);
//wyślij wiadomość odmowną
SignalMessage rejectedResponse = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.LinkConnectionDealocationResponse,
General_DestinationIpAddress = _localPcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "CC",
IsAccepted = false
};
SendMessageToPC(rejectedResponse);
//zakończ działanie metody
return;
}
#endregion
#region Wyslij_lokalne_i_zewnętrzne_snpRealise_i_czekaj_na_odp
bool accept = false;
List <int> dealocationIDList = new List <int>();
Random rnd = new Random();
while (!accept)
{
//losuje identyfikator negocjacji
dealocationIDList.Add(rnd.Next());
while (_isSnpRealiseAnswerBack.ContainsKey(dealocationIDList[0]))
{
dealocationIDList[0] = rnd.Next();
}
//utwórz wpis w słowniku z danym ID
_isSnpRealiseAnswerBack.Add(dealocationIDList[0], false);
//wysyłamy SNPRealise do lokalnego LRM
SignalMessage snmInsideNegotiation = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPRealise,
General_DestinationIpAddress = _localPcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = dealocationIDList[0],
Negotiation_SnppID = second._localID,
Negotiation_ConnectionID = connectionID
};
SendMessageToPC(snmInsideNegotiation);
//wysyłamy SNPRealise do pozostałych podsieci jeżeli jest taka konieczność
if (first._areaName != _areaName)
{
dealocationIDList.Add(rnd.Next());
while (_isSnpRealiseAnswerBack.ContainsKey(dealocationIDList[dealocationIDList.Count - 1]))
{
dealocationIDList[dealocationIDList.Count - 1] = rnd.Next();
}
//utwórz wpisy w słownikach
_isSnpRealiseAnswerBack.Add(dealocationIDList[dealocationIDList.Count - 1], false);
//znajdź adres PC odpowiedzialnego za dany LRM w sieci first._areaName
string destinationIpAddr = _lrmToSubnetworksDictionary[first._areaName];
SignalMessage message = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPRealise,
General_SourceIpAddress = _localPcIpAddress,
General_DestinationIpAddress = destinationIpAddr,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = dealocationIDList[dealocationIDList.Count - 1],
Negotiation_SnppID = first._areaNameSnppID,
Negotiation_ConnectionID = connectionID
};
SendMessageToPC(message);
}
if (second._areaName != _areaName)
{
dealocationIDList.Add(rnd.Next());
while (_isSnpRealiseAnswerBack.ContainsKey(dealocationIDList[dealocationIDList.Count - 1]))
{
dealocationIDList[dealocationIDList.Count - 1] = rnd.Next();
}
//utwórz wpisy w słownikach
_isSnpRealiseAnswerBack.Add(dealocationIDList[dealocationIDList.Count - 1], false);
//znajdź adres PC odpowiedzialnego za dany LRM w sieci first._areaName
string destinationIpAddr = _lrmToSubnetworksDictionary[second._areaName];
SignalMessage message = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPRealise,
General_SourceIpAddress = _localPcIpAddress,
General_DestinationIpAddress = destinationIpAddr,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = dealocationIDList[dealocationIDList.Count - 1],
Negotiation_SnppID = second._areaNameSnppID,
Negotiation_ConnectionID = connectionID
};
SendMessageToPC(message);
}
//czekamy biernie na odpowiedzi wszystkie (min 1 max 3)
int waitingAnswerstToGet = dealocationIDList.Count;
while (waitingAnswerstToGet != 0)
{
for (int i = 0; i < dealocationIDList.Count; i++)
{
if (_isSnpRealiseAnswerBack[(dealocationIDList[i])] == true)
{
waitingAnswerstToGet--;
}
}
}
//sprawdzamy, czy wszystkie odpowiedzi były prawidłowe
int numberOfAcceptAnswers = 0;
for (int i = 0; i < dealocationIDList.Count; i++)
{
if (_snpRealiseAnswerBack[dealocationIDList[i]] == true)
{
numberOfAcceptAnswers++;
}
}
if (numberOfAcceptAnswers == dealocationIDList.Count)
{
accept = true;
}
else
{
accept = false;
//tutaj trzeba namierzyć tą która jest zła i wysłać Realise i ponownie spróbować losować jakąć czy coś
}
}//end while(!accept)
#endregion
#region Zwalnianie_etykiety_i_usuwanie_localSNP
//zwalnianie etykiety
int freeLabel = localSNP._allocatedLabel;
first._availableLabels.Add(freeLabel);
//usuwanie local SNP
first._allocatedSNP.Remove(localSNP);
#endregion
#region Wysyłanie_wiadomości_wstecznej
SignalMessage acceptedMessage = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.LinkConnectionDealocationResponse,
General_DestinationIpAddress = _localPcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "CC",
IsAccepted = true,
};
SendMessageToPC(acceptedMessage);
#endregion
}
private void SNPNegotiation_Analyse(int negotiationID, int connectionID, int label, int snppID, int connectionCapacity, string sourcePcIpAddress)
{
#region Odszukuje_obiekt_SNPP_o_zadanym_id
SNPP requestedSnpp = null;
for (int i = 0; i < _snppList.Count; i++)
{
if (_snppList[i]._localID == snppID)
{
requestedSnpp = _snppList[i];
break;
}
}
//jeżeli nie ma takiego obiektu to zwróć błąd
if (requestedSnpp == null)
{
//jest jakiś błąd i trzeba to zakomunikować
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR (SnppNegotiation)- Cannot find the SNPP with ID equals " + snppID);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR (SnppNegotiation)- Cannot find the SNPP with ID equals " + snppID);
//zwróć odpowiedź negatywną
SignalMessage rejectedMessage = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPNegotiationResponse,
General_DestinationIpAddress = sourcePcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = negotiationID,
IsAccepted = false
};
//wyslij wiadomość i wyjdź z metody
SendMessageToPC(rejectedMessage);
return;
}
#endregion
#region Sprawdzam_czy_etykieta_jest_wolna_i_wyslij_odpowiednia_wiadomosc
if (requestedSnpp._availableLabels.Contains(label))
{
//etykieta jest wolna
int index = requestedSnpp._allocatedSNP.Count;
SNP allocatedSnp = new SNP
{
_snpID = index,
_snppID = requestedSnpp._localID,
_allocatedCapacity = connectionCapacity,
_allocatedLabel = label,
_connectionID = connectionID
};
requestedSnpp._allocatedSNP.Add(allocatedSnp);
//wyślij odpowiedź zawierającą zaalokowane SNP
SignalMessage accepteddMessage = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPNegotiationResponse,
General_DestinationIpAddress = sourcePcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = negotiationID,
IsAccepted = true,
Negotiation_AllocatedSNP = allocatedSnp
};
//wyslij wiadomość i wyjdź z metody
SendMessageToPC(accepteddMessage);
}
else
{
//etykieta jest zajęta
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR (SnppNegotiation)- Lable already in use: " + label);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR (SnppNegotiation)- Lable already in use: " + label);
//zwróć odpowiedź negatywną
SignalMessage rejectedMessage = new SignalMessage()
{
General_SignalMessageType = SignalMessage.SignalType.SNPNegotiationResponse,
General_DestinationIpAddress = sourcePcIpAddress,
General_SourceIpAddress = _localPcIpAddress,
General_SourceModule = "LRM",
General_DestinationModule = "LRM",
Negotiation_ID = negotiationID,
IsAccepted = false
};
//wyslij wiadomość i wyjdź z metody
SendMessageToPC(rejectedMessage);
return;
}
#endregion
}
private void LinkConnectionRequest(int connectionID, SignalMessage.Pair snpp_id_pair, int connectionCapacity) //DOKOŃCZYC
{
#region Odnajdywanie_SNPP_i_sprawdzenie_czy_istnieją
//odnajdz pierwszy i drugi SNPP
SNPP first = null;
SNPP second = null;
//wyszukuje pierwszą wartość w liście
for (int i = 0; i < _snppList.Count; i++)
{
if (_snppList[i]._localID == snpp_id_pair.first)
{
first = _snppList[i];
break;
}
}
//jeżeli nie ma takiego elementu to zwróć bład
if (first == null)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
}
else
{
//wyszukuje drugą wartość w liście
for (int i = 0; i < _snppList.Count; i++)
{
if (_snppList[i]._localID == snpp_id_pair.second)
{
second = _snppList[i];
break;
}
}
//jeżeli nie ma takiego elementu to zwróć bład
if (second == null)
{
SignallingNodeDeviceClass.MakeSignallingLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
SignallingNodeDeviceClass.MakeSignallingConsoleLog("LRM", "ERROR - Cannot find the SNPP with ID equals " + snpp_id_pair.first);
}
}
if (first == null || second == null)
{
//wyślij wiadomośc negatywną
LinkConnectionResponse(connectionID, false, null, null);
//zakończ działanie metody
return;
}
#endregion
#region Sprawdzenie_czy_nie_ma_jakiegos_SNP_zwiazanego_z_tym_connectionID
//Sprawdz, czy nie ma jakiegoś SNP związanego z tym connectionID
int labelToForward = -1;
for (int i = 0; i < first._allocatedSNP.Count; i++)
{
if (first._allocatedSNP[i]._connectionID == connectionID)
{
labelToForward = first._allocatedSNP[i]._allocatedLabel;
break;
}
}
// Jeżeli nie ma, to sprawdz w drugim
if (labelToForward == -1)
{
for (int i = 0; i < second._allocatedSNP.Count; i++)
{
if (second._allocatedSNP[i]._connectionID == connectionID)
{
labelToForward = second._allocatedSNP[i]._allocatedLabel;
break;
}
}
}
#endregion
#region Ewentualne_losowanie_i_negocjacja_wybranej_etykiety
int numberOfIterations = 0;
bool accept = false;
List <int> negotiationIDList = new List <int>();
Random rnd = new Random();
while (!accept)
{
numberOfIterations++;
if (labelToForward == -1)
{
labelToForward = GetNextFreeLabel(first, second, numberOfIterations - 1);
}
if (labelToForward == -1)
{
//wyślij wiadomośc negatywną
LinkConnectionResponse(connectionID, false, null, null);
}
else
{
//losuje identyfikator negocjacji
negotiationIDList.Add(rnd.Next());
while (_isSnpNegotiationAnswerBack.ContainsKey(negotiationIDList[0]))
{
negotiationIDList[0] = rnd.Next();
}
_isSnpNegotiationAnswerBack.Add(negotiationIDList[0], false);
_snpNegotiatinAnswerBackAreaName.Add(negotiationIDList[0], _areaName);
//wysyłamy SNMNegotiation do lokalnego LRM
SNPNegotiation(negotiationIDList[0], connectionID, labelToForward, second._localID, connectionCapacity);
//wysyłamy SNMNegotiation do pozostałych podsieci jeżeli jest taka konieczność
if (first._areaName != _areaName)
{
negotiationIDList.Add(rnd.Next());
while (_isSnpNegotiationAnswerBack.ContainsKey(negotiationIDList[negotiationIDList.Count - 1]))
{
negotiationIDList[negotiationIDList.Count - 1] = rnd.Next();
}
//utwórz wpisy w słownikach
_isSnpNegotiationAnswerBack.Add(negotiationIDList[negotiationIDList.Count - 1], false);
_snpNegotiatinAnswerBackAreaName.Add(negotiationIDList[negotiationIDList.Count - 1], first._areaName);
//znajdź adres PC odpowiedzialnego za dany LRM w sieci first._areaName
string destinationIpAddr = _lrmToSubnetworksDictionary[first._areaName];
//wyslij wiadomość
SNPNegotiation(
negotiationIDList[negotiationIDList.Count - 1],
connectionID,
labelToForward,
first._areaNameSnppID,
connectionCapacity,
destinationIpAddr);
}
if (second._areaName != _areaName)
{
negotiationIDList.Add(rnd.Next());
while (_isSnpNegotiationAnswerBack.ContainsKey(negotiationIDList[negotiationIDList.Count - 1]))
{
negotiationIDList[negotiationIDList.Count - 1] = rnd.Next();
}
//utwórz wpisy w słownikach
_isSnpNegotiationAnswerBack.Add(negotiationIDList[negotiationIDList.Count - 1], false);
_snpNegotiatinAnswerBackAreaName.Add(negotiationIDList[negotiationIDList.Count - 1], second._areaName);
//znajdź adres PC odpowiedzialnego za dany LRM w sieci second._areaName
string destinationIpAddr = _lrmToSubnetworksDictionary[second._areaName];
//wyslij wiadomość
SNPNegotiation(
negotiationIDList[negotiationIDList.Count - 1],
connectionID,
labelToForward,
second._areaNameSnppID,
connectionCapacity,
destinationIpAddr);
}
//czekamy biernie na odpowiedzi wszystkie (min 1 max 3)
int waitingAnswerstToGet = negotiationIDList.Count;
while (waitingAnswerstToGet != 0)
{
for (int i = 0; i < negotiationIDList.Count; i++)
{
if (_isSnpNegotiationAnswerBack[(negotiationIDList[i])] == true)
{
waitingAnswerstToGet--;
}
}
}
//sprawdzamy, czy wszystkie odpowiedzi były prawidłowe
int numberOfAcceptAnswers = 0;
for (int i = 0; i < negotiationIDList.Count; i++)
{
if (_snpNegotiationAnswerBack[negotiationIDList[i]].IsAccepted == true)
{
numberOfAcceptAnswers++;
}
}
if (numberOfAcceptAnswers == negotiationIDList.Count)
{
accept = true;
}
else
{
accept = false;
//tutaj trzeba namierzyć tą która jest zła i wysłać Realise i ponownie spróbować losować jakąć czy coś
}
}
}
//------------------------------------------------------------------
// alokujemy SNP lokalnie (tylko pierwsza, bo druga mam w odpowiedzi)
int firstSnpID = first._allocatedSNP.Count + 1;
first._allocatedSNP.Add(new SNP {
_snpID = firstSnpID, _snppID = first._localID, _connectionID = connectionID, _allocatedCapacity = connectionCapacity, _allocatedLabel = labelToForward
});
//------------------------------------------------------------------
// tworzymy odpowiedz (odpowiedz skłąda sie z listy SNP zaalokowanych oraz w takiej samej kolejności wypisanych areaName w drugij liscie
List <SNP> receivedSnps = new List <SNP>();
List <string> receivedSnpsAreaNames = new List <string>();
//dodaj stwój lokalnie dodany SNP do listy
receivedSnps.Add(first._allocatedSNP[firstSnpID]);
receivedSnpsAreaNames.Add(_areaName);
//dodaj resztę wpisów
for (int i = 0; i < negotiationIDList.Count; i++)
{
receivedSnps.Add(_snpNegotiationAnswerBack[(negotiationIDList[i])].Negotiation_AllocatedSNP);
receivedSnpsAreaNames.Add(_snpNegotiatinAnswerBackAreaName[(negotiationIDList[i])]);
}
//wyślij wiadomość potwierdzającą
LinkConnectionResponse(connectionID, true, receivedSnps, receivedSnpsAreaNames);
#endregion
}