问题描述
我正在尝试使用libusb编写代码,以使我的Asus Aura RGB可寻址标头混乱。目前,我已经获得了该设备的设备句柄,并且据我所知,我需要使用以下数据将控制权转移到该设备。我使用USBPcap捕获的数据。我使用了与使用的值完全相同的值,但它无法正确发送,并且得到了以下日志。
USB设备:
T: Bus=03 Lev=01 Prnt=01 Port=05 Cnt=02 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: vendor=0b05 ProdID=18f3 Rev=01.00
S: Manufacturer=AsusTek Computer Inc.
S: Product=AURA LED Controller
S: SerialNumber=9876543210
C: #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=16mA
I: If#=0x0 Alt= 0 #EPs= 0 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I: If#=0x2 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=usbhid
用于红色工作集的Wireshark:
USB URB
[Source: host]
[Destination: 3.3.0]
URB id: 0xffff9f12269dca80
URB type: URB_SUBMIT ('S')
URB transfer type: URB_CONTROL (0x02)
Endpoint: 0x00,Direction: OUT
Device: 3
URB bus id: 3
Device setup request: relevant (0)
Data: present (0)
URB sec: 1600327717
URB usec: 525841
URB status: Operation Now in progress (-EINPROGRESS) (-115)
URB length [bytes]: 65
Data length [bytes]: 65
[Response in: 24]
Interval: 0
Start frame: 0
copy of Transfer Flags: 0x00000000
Number of ISO descriptors: 0
[bInterfaceClass: UnkNown (0xffff)]
Setup Data
bmRequestType: 0x21
0... .... = Direction: Host-to-device
.01. .... = Type: Class (0x1)
...0 0001 = Recipient: Interface (0x01)
bRequest: 9
wValue: 0x02ec
wIndex: 2 (0x0002)
wLength: 65
Data Fragment: ec40840005ff0000ff0000ff0000ff0000ff000000000000…
无法正常工作的代码的日志:
[ 0.328415] [000041d2] libusb: debug [libusb_claim_interface] interface 0
2020-09-17 03:15:38: set_rgb::47 > Length = 65
[ 0.328463] [000041d2] libusb: debug [libusb_alloc_transfer] transfer 0x56099b879030
[ 0.328466] [000041d2] libusb: debug [libusb_submit_transfer] transfer 0x56099b879030
[ 0.328478] [000041d2] libusb: error [submit_control_transfer] submiturb Failed error -1 errno=16
[ 0.328482] [000041d2] libusb: debug [libusb_free_transfer] transfer 0x56099b879030
2020-09-17 03:15:38: set_rgb::53 > Failure LIBUSB_ERROR_IO
无效代码:
static int set_rgb(int red,int green,int blue)
{
// no rgb just static red for Now. (This is the data captured by Wireshark Windows).
// S Co:3:003:0 s 21 09 02ec 0002 0041 65 = ec408400 05ff0000 ff0000ff 0000ff00 00ff0000 00000000 00000000 00000000
// looking at this 0x21 bRequestType 0x09 bRequest 0x02ec wValue 0x2 wIndex.
unsigned char data[65] =
"\xec\x40\x84\x00\x05\xff\x00\x00\xff\x00\x00\xff\x00\x00\xff\x00"
"\x00\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
struct libusb_config_descriptor *cfg_desc = NULL;
int ret = 0;
ret = libusb_set_auto_detach_kernel_driver(dev_handle,1);
CHECK_COND(ret == LIBUSB_SUCCESS,ret);
libusb_get_active_config_descriptor(dev,&cfg_desc);
int interface_number =
cfg_desc->interface[0].altsetting[0].bInterfaceNumber;
ret = libusb_claim_interface(dev_handle,interface_number);
CHECK_COND(ret == LIBUSB_SUCCESS,ret);
int r = libusb_control_transfer(dev_handle,0x21,9,0x02ec,0x0002,data,sizeof(data),0);
if (r == LIBUSB_SUCCESS) {
LOG("Sucess\n");
} else {
LOG("Failure %s\n",libusb_error_name(r));
}
return r;
}
- 我阅读了几篇有关控件传输的不同输入的文章,例如bRequestCode,bRequest,wValue,wIndex等。我不确定我是否了解得很好。这些到底是什么,目的是什么?
- 如何调试/修复此问题。我尝试使用提升的特权,但得到的结果相同。
解决方法
您从libusb收到的错误是16,它是EBUSY(设备或资源繁忙)。您是否已经在系统中为此USB设备安装了一些驱动程序?如果是,请尝试通过卸载该设备的驱动程序模块来解决此问题,然后再次运行程序。