public static async Task <TcpMultiPartyNetworkSession> EstablishAsync(Party localParty, IPAddress address, int startPort, int numberOfParties)
{
TcpTwoPartyNetworkSession[] remotePartySessions = new TcpTwoPartyNetworkSession[numberOfParties - 1];
for (int i = 0; i < localParty.Id; ++i)
{
remotePartySessions[i] = await TcpTwoPartyNetworkSession.ConnectAsync(localParty, address, startPort + i);
}
TcpListener listener = new TcpListener(IPAddress.Any, startPort + localParty.Id)
{
ExclusiveAddressUse = true
};
listener.Start();
for (int j = localParty.Id + 1; j < numberOfParties; ++j)
{
remotePartySessions[j - 1] = await TcpTwoPartyNetworkSession.AcceptAsync(localParty, listener);
}
listener.Stop();
for (int i = 0; i < numberOfParties; ++i)
{
if (i != localParty.Id && !remotePartySessions.Any(session => session.RemoteParty.Id == i))
{
throw new NetworkConsistencyException("Inconsistent TCP connection graph.");
}
}
return(new TcpMultiPartyNetworkSession(localParty, remotePartySessions));
}
public static async Task <TcpMultiPartyNetworkSession> EstablishAsync(Party localParty, IPEndPoint[] endPoints)
{
if (localParty.Id < 0 || localParty.Id >= endPoints.Length)
{
throw new ArgumentException($"Local party id {localParty.Id} is out of range.");
}
IPEndPoint localEndPoint = endPoints[localParty.Id];
TcpTwoPartyNetworkSession[] outgoingSessions = await TcpTwoPartyNetworkSession.ConnectAsync(
localParty,
endPoints,
localParty.Id
);
TcpTwoPartyNetworkSession[] incomingSessions = await TcpTwoPartyNetworkSession.AcceptAsync(
localParty,
localEndPoint,
endPoints.Length - localParty.Id - 1
);
List <ITwoPartyNetworkSession> remotePartySessions = new List <ITwoPartyNetworkSession>(endPoints.Length - 1);
remotePartySessions.AddRange(outgoingSessions);
remotePartySessions.AddRange(incomingSessions);
for (int i = 0; i < endPoints.Length; ++i)
{
if (i != localParty.Id && remotePartySessions.All(session => session.RemoteParty.Id != i))
{
throw new NetworkConsistencyException("Inconsistent TCP connection graph.");
}
}
return(new TcpMultiPartyNetworkSession(localParty, remotePartySessions));
}