Android 10 L2CAP连接IOException超时Wii平衡板 [英] Android 10 L2CAP connection IOException timeout Wii Balance Board

问题描述

很久以前，我被责成为Wii平衡板制作一个android应用程序，经过一番纠缠后，我发现android不再支持L2CAP.更多研究导致了解它正在重新是Android 10中的新增功能.随着Android 10的发布，我现在试图对其进行破解.

A long time ago I was tasked with making a android app for the Wii Balance Board, after some screwing around I found that android no longer supported L2CAP. More research lead to understand that it was being re-added in Android 10. With Android 10 out I've been trying to give it a crack now.

所以我目前的简单目标是与Wii平衡板建立连接.

So my simple goal at the moment is to create a connection with the Wii Balance Board.

我的连接方法是:

• 开始发现

• Start discovery

将发现的蓝牙设备添加到列表中

Add discovered bluetooth devices to list

当您单击设备时，它会尝试按以下方式打开套接字:

When you click on a device it then tries to open a socket as such:

bluetoothSocket = btDevice.createInsecureL2capChannel(port);

如 WiiBrew 网站中所述，我将psm值0x13用于输入和输出为0x11.

As mentioned on the WiiBrew site I'm using psm value 0x13 for input and 0x11 for output.

然后我使用bluetoothSocket.connect并继续接收IOException(超时错误)

I then use bluetoothSocket.connect and proceed to receive a IOException (timeout error)

我还尝试过同时使用createL2capChannel和createInsecureL2capChannel并获得相同的结果

I've also tried using both createL2capChannel and createInsecureL2capChannel with same results

我能够使用btDevice.createBond()成功配对到设备，然后将电话BT地址反向使用.setpin()，Wii平衡板只是充当了哑巴".输入设备. (不确定是否需要配对/好主意)

I was able to successfully pair to the device using btDevice.createBond() and then using the phones BT address backwards for .setpin() and the Wii Balance Board simply acts as a "dumb" input device. (not sure if pairing is needed/good idea)

以上是我尝试连接的简化流程.我还尝试过使用Paul Burton的 fitscales 中的BalanceBoard.java回购更新所有旧的蓝牙代码，再次，我仍然超时.

The above is a simplified flow of how I'm trying to connect. I've also tried using BalanceBoard.java from Paul Burton's fitscales repo updating all of the old bluetooth code, again I still get the timeout.

推荐答案

您是否看过bt_stack日志?

Have you looked at the bt_stack logs?

这是我尝试用Wiimote打开插座的方法:

Here is mine from trying to open a socket with a wiimote:

04-05 12:25:04.949 E/bt_stack(4895): [ERROR:btif_sock_l2cap.cc(244)] SOCK_LIST: free(id = 4) - NO app_fd!
04-05 12:25:04.949 I/bt_stack(4895): [INFO:btsnoop.cc(323)] clear_l2cap_whitelist: Clearing whitelist from l2cap channel. conn_handle=65535 cid=65:0
04-05 12:25:04.949 E/bt_l2cap(4895): L2CA_FreeLePSM: Invalid PSM=19 value!
04-05 12:25:40.141 I/bt_stack(4895): [INFO:btsnoop.cc(323)] clear_l2cap_whitelist: Clearing whitelist from l2cap channel. conn_handle=1 cid=66:64
04-05 12:25:55.736 I/bt_stack(4895): [INFO:btsnoop.cc(323)] clear_l2cap_whitelist: Clearing whitelist from l2cap channel. conn_handle=2 cid=67:65

我相信这就是问题所在，我只是一个新手，所以我不确定该怎么办.我知道旧的连接方式将fd作为参数传递给了蓝牙套接字构造函数，但我认为这不再可行

I believe this is where the problem lies, Im only a novice so Im not sure what can be done about it. I know the old ways of connecting passed the fd as a parameter to the bluetooth socket constructor but I dont think this is possible anymore

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