Remove SocketMode

This is pretty much a boolean now...let's make it one. Also note PhysicalConnection is passes as `this`, it can't be null.

StackExchange.Redis/StackExchange/Redis/PhysicalConnection.cs

@@ -860,12 +860,10 @@ private static LocalCertificateSelectionCallback GetAmbientCertificateCallback()
             return null;
         }
 
-        internal async ValueTask<SocketMode> ConnectedAsync(Socket socket, TextWriter log, SocketManager manager)
+        internal async ValueTask<bool> ConnectedAsync(Socket socket, TextWriter log, SocketManager manager)
         {
             try
             {
-                const SocketMode socketMode = SocketMode.Async;
-
                 // disallow connection in some cases
                 OnDebugAbort();
 
@@ -901,7 +899,7 @@ internal async ValueTask<SocketMode> ConnectedAsync(Socket socket, TextWriter lo
                     {
                         RecordConnectionFailed(ConnectionFailureType.AuthenticationFailure, authexception);
                         Multiplexer.Trace("Encryption failure");
-                        return SocketMode.Abort;
+                        return false;
                     }
                     pipe = StreamConnection.GetDuplex(ssl, manager.SendPipeOptions, manager.ReceivePipeOptions, name: Bridge.Name);
                 }
@@ -915,14 +913,14 @@ internal async ValueTask<SocketMode> ConnectedAsync(Socket socket, TextWriter lo
 
                 Multiplexer.LogLocked(log, "Connected {0}", Bridge);
 
-                await Bridge.OnConnectedAsync(this, log);
-                return socketMode;
+                await Bridge.OnConnectedAsync(this, log).ForAwait();
+                return true;
             }
             catch (Exception ex)
             {
                 RecordConnectionFailed(ConnectionFailureType.InternalFailure, ex); // includes a bridge.OnDisconnected
                 Multiplexer.Trace("Could not connect: " + ex.Message, physicalName);
-                return SocketMode.Abort;
+                return false;
             }
         }
 

StackExchange.Redis/StackExchange/Redis/SocketManager.cs

@@ -9,12 +9,6 @@
 
 namespace StackExchange.Redis
 {
-    internal enum SocketMode
-    {
-        Abort,
-        Async,
-    }
-
     /// <summary>
     /// A SocketManager monitors multiple sockets for availability of data; this is done using
     /// the Socket.Select API and a dedicated reader-thread, which allows for fast responses
@@ -150,8 +144,7 @@ private static void ConfigureTimeout(SocketAsyncEventArgs args, int timeoutMilli
 
         internal async void BeginConnectAsync(EndPoint endpoint, Socket socket, PhysicalConnection physicalConnection, ConnectionMultiplexer multiplexer, TextWriter log)
         {
-            var formattedEndpoint = Format.ToString(endpoint);
-            multiplexer.LogLocked(log, "BeginConnect: {0}", formattedEndpoint);
+            multiplexer.LogLocked(log, "BeginConnect: {0}", Format.ToString(endpoint));
 
             var awaitable = new SocketAwaitable();
             var args = new SocketAsyncEventArgs
@@ -180,24 +173,24 @@ internal async void BeginConnectAsync(EndPoint endpoint, Socket socket, Physical
 
                     await awaitable; // wait for the connect to complete or fail (will throw)
 
-                    switch (physicalConnection == null ? SocketMode.Abort : await physicalConnection.ConnectedAsync(socket, log, this).ForAwait())
+                    if (physicalConnection != null && await physicalConnection.ConnectedAsync(socket, log, this).ForAwait())
                     {
-                        case SocketMode.Async:
                         multiplexer.LogLocked(log, "Starting read");
                         try
                         {
                             physicalConnection.StartReading();
+                            // Normal return
                         }
                         catch (Exception ex)
                         {
                             ConnectionMultiplexer.TraceWithoutContext(ex.Message);
                             Shutdown(socket);
                         }
-                            break;
-                        default:
+                    }
+                    else
+                    {
                         ConnectionMultiplexer.TraceWithoutContext("Aborting socket");
                         Shutdown(socket);
-                            break;
                     }
                 }
                 catch (ObjectDisposedException)