Fix EINVAL returned on connect call to connecting socket

rpcs3/Emu/Cell/lv2/sys_net/lv2_socket_native.cpp

@@ -211,12 +211,20 @@ std::optional<s32> lv2_socket_native::connect(const sys_net_sockaddr& addr)
 		dnshook.add_dns_spy(lv2_id);
 	}
 
+#ifdef _WIN32
+	bool was_connecting = connecting;
+#endif
+
 	if (::connect(socket, reinterpret_cast<struct sockaddr*>(&native_addr), native_addr_len) == 0)
 	{
 		return CELL_OK;
 	}
 
+#ifdef _WIN32
+	sys_net_error result = get_last_error(!so_nbio, was_connecting);
+#else
 	sys_net_error result = get_last_error(!so_nbio);
+#endif
 
 	if (result)
 	{

rpcs3/Emu/Cell/lv2/sys_net/network_context.cpp

@@ -201,8 +201,8 @@ void network_thread::operator()()
 			fds[i].revents = 0;
 #ifdef _WIN32
 			const auto cur_connecting = socklist[i]->is_connecting();
-			was_connecting[i]         = connecting;
-			connecting[i]             = connecting;
+			was_connecting[i] = cur_connecting;
+			connecting[i] = cur_connecting;
 #endif
 		}
 	}

rpcs3/Emu/Cell/lv2/sys_net/sys_net_helpers.cpp

@@ -88,10 +88,15 @@ sys_net_error convert_error(bool is_blocking, int native_error, [[maybe_unused]]
 	}
 
 #ifdef _WIN32
-	// Windows will return SYS_NET_ENOTCONN when recvfrom/sendto is called on a socket that is connecting but not yet connected
-	if (is_connecting && result == SYS_NET_ENOTCONN)
+	if (is_connecting)
 	{
-		return SYS_NET_EAGAIN;
+		// Windows will return SYS_NET_ENOTCONN when recvfrom/sendto is called on a socket that is connecting but not yet connected
+		if (result == SYS_NET_ENOTCONN)
+			return SYS_NET_EAGAIN;
+
+		// See https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-connect
+		if (result == SYS_NET_EINVAL || result == SYS_NET_EWOULDBLOCK)
+			return SYS_NET_EALREADY;
 	}
 #endif