Grab a UDP Port Reservation

src/platform/datapath_winuser.c

@@ -1789,6 +1789,41 @@ QUIC_DISABLED_BY_FUZZER_START;
             }
         }
 
+        if (i == 0 &&
+            Config->LocalAddress &&
+            Config->LocalAddress->Ipv4.sin_port != 0) {
+            //
+            // Create a port reservation for the local port.
+            //
+            INET_PORT_RESERVATION_INSTANCE PortReservation;
+            INET_PORT_RANGE PortRange;
+            PortRange.StartPort = htons(Config->LocalAddress->Ipv4.sin_port);
+            PortRange.NumberOfPorts = 1;
+
+            Result =
+                WSAIoctl(
+                    SocketProc->Socket,
+                    SIO_ACQUIRE_PORT_RESERVATION,
+                    &PortRange,
+                    sizeof(PortRange),
+                    &PortReservation,
+                    sizeof(PortReservation),
+                    &BytesReturned,
+                    NULL,
+                    NULL);
+            if (Result == SOCKET_ERROR) {
+                int WsaError = WSAGetLastError();
+                QuicTraceEvent(
+                    DatapathErrorStatus,
+                    "[data][%p] ERROR, %u, %s.",
+                    Socket,
+                    WsaError,
+                    "SIO_ACQUIRE_PORT_RESERVATION");
+                Status = HRESULT_FROM_WIN32(WsaError);
+                goto Error;
+            }
+        }
+
         Result =
             bind(
                 SocketProc->Socket,