public MTUConfig GetMTU(IPEndPoint ep)
{
var result = new MTUConfig();
if (ep == null)
{
result.MTU = 1484 - 28; // IPV4 28 byte UDP header
result.MTUMax = 1484 - 28;
result.MTUMin = 620 - 28;
return(result);
}
switch (ep.AddressFamily)
{
case System.Net.Sockets.AddressFamily.InterNetwork:
result.MTU = 1484 - 28;
result.MTUMax = 1484 - 28;
result.MTUMin = 620 - 28;
break;
case System.Net.Sockets.AddressFamily.InterNetworkV6:
result.MTU = 1280 - 48; // IPV6 48 byte UDP header
result.MTUMax = 1472 - 48;
result.MTUMin = 1280 - 48;
break;
default:
throw new NotImplementedException($"{ep.AddressFamily} not supported");
}
return(result);
}
// Session to introducer
internal SSUSession(SSUHost owner, IPEndPoint remoteep, IntroducerInfo ii, IMTUProvider mtup, RouterContext rc)
{
Host = owner;
RemoteEP = remoteep;
MTUProvider = mtup;
MyRouterContext = rc;
RemoteAddr = new I2PRouterAddress(ii.Host, ii.Port, 0, "SSU");
// TODO: This is what PurpleI2P does. Seems strange... But there is no RouterInfo available for introducer sessions.
RemoteRouter = MyRouterContext.MyRouterIdentity;
TransportInstance = Interlocked.Increment(ref NTCPClient.TransportInstanceCounter);
#if LOG_ALL_TRANSPORT
DebugUtils.LogDebug("SSUSession: " + DebugId + " Introducer instance created.");
#endif
Fragmenter = new DataFragmenter();
if (RemoteAddr == null)
{
throw new NullReferenceException("SSUSession needs an address");
}
IntroKey = ii.IntroKey;
MTU = MTUProvider.GetMTU(remoteep);
}
// We are client
public SSUSession(SSUHost owner, IPEndPoint remoteep, I2PRouterAddress remoteaddr, I2PKeysAndCert rri, IMTUProvider mtup, RouterContext rc)
{
Host = owner;
RemoteEP = remoteep;
RemoteAddr = remoteaddr;
RemoteRouter = rri;
MTUProvider = mtup;
MyRouterContext = rc;
TransportInstance = Interlocked.Increment(ref NTCPClient.TransportInstanceCounter);
#if LOG_ALL_TRANSPORT
DebugUtils.LogDebug("SSUSession: " + DebugId + " Client instance created.");
#endif
Fragmenter = new DataFragmenter();
if (RemoteAddr == null)
{
throw new NullReferenceException("SSUSession needs an address");
}
IntroKey = new BufLen(FreenetBase64.Decode(RemoteAddr.Options["key"]));
MTU = MTUProvider.GetMTU(remoteep);
}
public MTUConfig GetMTU(IPEndPoint ep)
{
var result = new MTUConfig();
result.MTU = 1484 - 28;
result.MTUMax = 1484 - 28;
result.MTUMin = 620 - 28;
return(result);
}
// We are host
public SSUSession(SSUHost owner, IPEndPoint remoteep, IMTUProvider mtup, RouterContext rc)
{
Host = owner;
RemoteEP = remoteep;
MTUProvider = mtup;
MyRouterContext = rc;
TransportInstance = Interlocked.Increment(ref NTCPClient.TransportInstanceCounter) + 10000;
#if LOG_ALL_TRANSPORT
DebugUtils.LogDebug("SSUSession: " + DebugId + " Host instance created.");
#endif
Fragmenter = new DataFragmenter();
MTU = MTUProvider.GetMTU(remoteep);
SendQueue.AddLast((new DeliveryStatusMessage((ulong)I2PConstants.I2P_NETWORK_ID)).Header5);
SendQueue.AddLast((new DatabaseStoreMessage(MyRouterContext.MyRouterInfo)).Header5);
CurrentState = new SessionCreatedState(this);
}
public void MTUUsed(IPEndPoint ep, MTUConfig mtu)
{
}
