private void ReceiveCallback(IAsyncResult ar)
{
SSUSession session = null;
try
{
EndPoint ep = RemoteEP;
var size = MySocket.EndReceiveFrom(ar, ref ep);
if (ep.AddressFamily != AddressFamily.InterNetwork &&
(!SessionLayer.RouterContext.Inst.UseIpV6 ||
ep.AddressFamily != AddressFamily.InterNetworkV6))
{
return; // TODO: Add IPV6
}
if (size <= 37)
{
Logging.LogDebugData($"SSU Recv: {size} bytes [0x{size:X}] from {ep} (hole punch, ignored)");
return;
}
var sessionendpoint = (IPEndPoint)ep;
Logging.LogDebugData($"SSU Recv: {size} bytes [0x{size:X}] from {ep}");
lock ( Sessions )
{
if (!Sessions.ContainsKey(sessionendpoint))
{
if (IPFilter.IsFiltered(((IPEndPoint)ep).Address))
{
Logging.LogTransport($"SSUHost ReceiveCallback: IPAddress {sessionendpoint} is blocked. {size} bytes.");
return;
}
++IncommingConnectionAttempts;
Logging.LogTransport($"SSUHost: incoming connection " +
$"from {sessionendpoint} created.");
session = new SSUSession(
this,
Send,
(IPEndPoint)ep,
MyRouterContext);
Sessions[sessionendpoint] = session;
Logging.LogTransport($"SSUHost: incoming connection " +
$"{session.DebugId} from {sessionendpoint} created.");
NeedCpu(session);
ConnectionCreated?.Invoke(session);
}
else
{
session = Sessions[sessionendpoint];
}
}
var localbuffer = BufRefLen.Clone(ReceiveBuf, 0, size);
#if DEBUG
Stopwatch Stopwatch1 = new Stopwatch();
Stopwatch1.Start();
#endif
try
{
session.Receive(localbuffer);
}
catch (ThreadAbortException taex)
{
AddFailedSession(session);
Logging.Log(taex);
}
catch (ThreadInterruptedException tiex)
{
AddFailedSession(session);
Logging.Log(tiex);
}
catch (ChecksumFailureException cfex)
{
AddFailedSession(session);
Logging.Log(cfex);
}
catch (SignatureCheckFailureException scex)
{
AddFailedSession(session);
Logging.Log(scex);
}
catch (FailedToConnectException fcex)
{
AddFailedSession(session);
#if LOG_MUCH_TRANSPORT
Logging.LogTransport(fcex);
#endif
if (session != null)
{
NetDb.Inst.Statistics.FailedToConnect(session.RemoteRouterIdentity.IdentHash);
session.RaiseException(fcex);
}
}
#if DEBUG
Stopwatch1.Stop();
if (Stopwatch1.ElapsedMilliseconds > SessionCallWarningLevelMilliseconds)
{
Logging.LogTransport(
$"SSUHost ReceiveCallback: WARNING Session {session} used {Stopwatch1.ElapsedMilliseconds}ms cpu.");
}
#endif
}
catch (Exception ex)
{
AddFailedSession(session);
Logging.Log(ex);
if (session != null && session.RemoteRouterIdentity != null && NetDb.Inst != null)
{
NetDb.Inst.Statistics.DestinationInformationFaulty(session.RemoteRouterIdentity.IdentHash);
session.RaiseException(ex);
}
}
finally
{
RemoteEP = LocalEP;
MySocket.BeginReceiveFrom(ReceiveBuf, 0, ReceiveBuf.Length, SocketFlags.None, ref RemoteEP,
new AsyncCallback(ReceiveCallback), MySocket);
}
}
private void ReceiveCallback(IAsyncResult ar)
{
SSUSession session = null;
try
{
EndPoint ep = RemoteEP;
var size = MySocket.EndReceiveFrom(ar, ref ep);
if (ep.AddressFamily != AddressFamily.InterNetwork)
{
return; // TODO: Add IPV6
}
if (size <= 37)
{
#if LOG_ALL_TRANSPORT
DebugUtils.Log(string.Format("SSU Recv: {0} bytes [0x{0:X}] from {1} (hole punch, ignored)", size, ep));
#endif
return;
}
var key = (IPEndPoint)ep;
#if LOG_ALL_TRANSPORT
DebugUtils.Log(string.Format("SSU Recv: {0} bytes [0x{0:X}] from {1}", size, ep));
#endif
lock ( Sessions )
{
if (!Sessions.ContainsKey(key))
{
if (IPFilter.IsFiltered(((IPEndPoint)ep).Address))
{
DebugUtils.LogDebug(() => string.Format("SSUHost ReceiveCallback: IPAddress {0} is blocked. {1} bytes.",
key, size));
return;
}
++IncommingConnectionAttempts;
session = new SSUSession(this, (IPEndPoint)ep, MTUProvider, MyRouterContext);
Sessions[key] = session;
DebugUtils.LogDebug("SSUHost: incoming connection " + session.DebugId + " from " + key.ToString() + " created.");
NeedCpu(session);
if (ConnectionCreated != null)
{
ConnectionCreated(session);
}
}
else
{
session = Sessions[key];
}
}
var localbuffer = BufRefLen.Clone(ReceiveBuf, 0, size);
#if DEBUG
Stopwatch Stopwatch1 = new Stopwatch();
Stopwatch1.Start();
#endif
try
{
session.Receive(localbuffer);
}
catch (ThreadAbortException taex)
{
AddFailedSession(session);
DebugUtils.Log(taex);
}
catch (ThreadInterruptedException tiex)
{
AddFailedSession(session);
DebugUtils.Log(tiex);
}
catch (ChecksumFailureException cfex)
{
AddFailedSession(session);
DebugUtils.Log(cfex);
}
catch (SignatureCheckFailureException scex)
{
AddFailedSession(session);
DebugUtils.Log(scex);
}
catch (FailedToConnectException fcex)
{
AddFailedSession(session);
#if LOG_ALL_TRANSPORT
DebugUtils.Log(fcex);
#endif
if (session != null)
{
NetDb.Inst.Statistics.FailedToConnect(session.RemoteRouterIdentity.IdentHash);
session.RaiseException(fcex);
}
}
#if DEBUG
Stopwatch1.Stop();
if (Stopwatch1.ElapsedMilliseconds > SessionCallWarningLevelMilliseconds)
{
DebugUtils.LogDebug(() =>
string.Format("SSUHost ReceiveCallback: WARNING Session {0} used {1}ms cpu.", session, Stopwatch1.ElapsedMilliseconds));
}
#endif
}
catch (Exception ex)
{
AddFailedSession(session);
DebugUtils.Log(ex);
if (session != null && session.RemoteRouterIdentity != null && NetDb.Inst != null)
{
NetDb.Inst.Statistics.DestinationInformationFaulty(session.RemoteRouterIdentity.IdentHash);
session.RaiseException(ex);
}
}
finally
{
RemoteEP = LocalEP;
MySocket.BeginReceiveFrom(ReceiveBuf, 0, ReceiveBuf.Length, SocketFlags.None, ref RemoteEP,
new AsyncCallback(ReceiveCallback), MySocket);
}
}
