[ntcore] Fix EALREADY errors by tracking read state (#7202)

ntcore/src/main/native/cpp/net/WebSocketConnection.h

@@ -59,8 +59,18 @@ class WebSocketConnection final
     return m_ws.GetLastReceivedTime();
   }
 
-  void StopRead() final { m_ws.GetStream().StopRead(); }
-  void StartRead() final { m_ws.GetStream().StartRead(); }
+  void StopRead() final {
+    if (m_readActive) {
+      m_ws.GetStream().StopRead();
+      m_readActive = false;
+    }
+  }
+  void StartRead() final {
+    if (!m_readActive) {
+      m_ws.GetStream().StartRead();
+      m_readActive = true;
+    }
+  }
 
   void Disconnect(std::string_view reason) final;
 
@@ -80,6 +90,7 @@ class WebSocketConnection final
 
   wpi::WebSocket& m_ws;
   wpi::Logger& m_logger;
+  bool m_readActive = true;
 
   class Stream;
 

ntcore/src/main/native/cpp/net3/UvStreamConnection3.h

@@ -41,8 +41,18 @@ class UvStreamConnection3 final
 
   uint64_t GetLastFlushTime() const final { return m_lastFlushTime; }
 
-  void StopRead() final { m_stream.StopRead(); }
-  void StartRead() final { m_stream.StartRead(); }
+  void StopRead() final {
+    if (m_readActive) {
+      m_stream.StopRead();
+      m_readActive = false;
+    }
+  }
+  void StartRead() final {
+    if (!m_readActive) {
+      m_stream.StartRead();
+      m_readActive = true;
+    }
+  }
 
   void Disconnect(std::string_view reason) final;
 
@@ -62,6 +72,7 @@ class UvStreamConnection3 final
   std::string m_reason;
   uint64_t m_lastFlushTime = 0;
   int m_sendsActive = 0;
+  bool m_readActive = true;
 };
 
 }  // namespace nt::net3