internal void ServiceRequest(Object state)
{
IpcServerHandler ipcServerHandler = (IpcServerHandler)state;
// Read the headers from the stream, using the header size in the message
ITransportHeaders headers = ipcServerHandler.ReadHeaders();
// Get the request Stream
Stream requestStream = ipcServerHandler.GetRequestStream();
// customErrors should be disabled, since we are on the same machine
headers["__CustomErrorsEnabled"] = false;
// process request
ServerChannelSinkStack sinkStack = new ServerChannelSinkStack();
sinkStack.Push(this, ipcServerHandler);
IMessage responseMessage = null;
ITransportHeaders responseHeaders = null;
Stream responseStream = null;
WindowsIdentity identity = null;
IPrincipal oldPrincipal = null;
bool impersonated = false;
bool principalChanged = false;
ServerProcessing processing = ServerProcessing.Complete;
try{
if (_secure)
{
IpcPort port = ipcServerHandler.Port;
port.ImpersonateClient();
oldPrincipal = Thread.CurrentPrincipal;
principalChanged = true;
impersonated = true;
identity = WindowsIdentity.GetCurrent();
// If the authentication mode is to identify callers only revert the impersonation immediately
if (!_impersonate)
{
NativePipe.RevertToSelf();
Thread.CurrentPrincipal = new GenericPrincipal(identity, null);
impersonated = false;
}
else
{
if (identity.ImpersonationLevel == TokenImpersonationLevel.Impersonation ||
identity.ImpersonationLevel == TokenImpersonationLevel.Delegation)
{
// Set the current principal
Thread.CurrentPrincipal = new WindowsPrincipal(identity);
}
else
{
throw new RemotingException(CoreChannel.GetResourceString(
"Remoting_Ipc_TokenImpersonationFailure"));
}
}
}
processing =
_nextSink.ProcessMessage(sinkStack, null, headers, requestStream,
out responseMessage,
out responseHeaders, out responseStream);
}
catch (Exception e) {
ipcServerHandler.CloseOnFatalError(e);
}
finally{
// Revert the principal if we had changed the principal
if (principalChanged)
{
Thread.CurrentPrincipal = oldPrincipal;
}
// Revert the impersonation if we had impersonated
if (impersonated)
{
NativePipe.RevertToSelf();
impersonated = false;
}
}
// handle response
switch (processing)
{
case ServerProcessing.Complete:
{
// Send the response. Call completed synchronously.
sinkStack.Pop(this);
// Send the response back to the client
ipcServerHandler.SendResponse(responseHeaders, responseStream);
break;
} // case ServerProcessing.Complete
case ServerProcessing.OneWay:
{
// No response needed, but the following method will make sure that
// we send at least a skeleton reply if the incoming request was
// not marked OneWayRequest (client/server metadata could be out of
// [....]).
ipcServerHandler.SendResponse(responseHeaders, responseStream);
break;
} // case ServerProcessing.OneWay
case ServerProcessing.Async:
{
sinkStack.StoreAndDispatch(this, ipcServerHandler);
break;
} // case ServerProcessing.Async
} // switch (processing)
// Start waiting for the next request
if (processing != ServerProcessing.Async)
{
ipcServerHandler.BeginReadMessage();
}
} // ServiceRequest
