Hello, Thanks for responding! As mentioned, I am trying to find a working, programmatic way to pass a USB devices by either libusb_device or libusb_device_handle from aSPICE and Opaque. I've now compiled libusb, usbredir 0.12, and recompiled spice-gtk 0.39 with usbredir support. The code I came up with looks like the following. The integer fileDescriptor holds a file descriptor for the USB device obtained in java after requesting permissions from the user. The first bit is from https://github.com/libusb/libusb/blob/master/android/README. NOTE: For the part after the call to allocate_backend_device(), I had to include the entire usb-backend.c file as you do in your tests in spice-gtk, since I couldn't find a public API that allows me to construct a SpiceUsbDevice. This may be a feature request that I'd need to open with your project provided we can get USB redirection to work in the first place. ====================================== JNIEXPORT void JNICALL Java_com_undatech_opaque_SpiceCommunicator_SpiceSetNativeFileDescriptor(JNIEnv *env, jobject obj, jint fileDescriptor) { // START: https://github.com/libusb/libusb/blob/master/android/README libusb_context *ctx = NULL; libusb_device_handle *devh = NULL; int r = 0; r = libusb_set_option(NULL, LIBUSB_OPTION_NO_DEVICE_DISCOVERY, NULL); if (r != LIBUSB_SUCCESS) { LOGE("%s: libusb_set_option failed", __FUNCTION__); return; } r = libusb_init(&ctx); if (r < 0) { LOGE("%s: libusb_init failed", __FUNCTION__); return; } LOGD("%s: calling libusb_wrap_sys_device", __FUNCTION__); r = libusb_wrap_sys_device(ctx, (intptr_t)fileDescriptor, &devh); if (r < 0) { LOGE("%s: libusb_wrap_sys_device failed", __FUNCTION__); return; } else if (devh == NULL) { LOGE("%s: libusb_wrap_sys_device returned invalid handle", __FUNCTION__); return; } // END: https://github.com/libusb/libusb/blob/master/android/README // Calling functionality from usb-backend.c SpiceUsbDevice *device = allocate_backend_device(libusb_get_device(devh)); SpiceUsbDeviceManager *manager = spice_usb_device_manager_get(global_conn->session, NULL); if (manager == NULL) { LOGE("%s: spice_usb_device_manager_get returned null manager", __FUNCTION__); return; } LOGD("%s: Attaching device via spice_usb_device_manager_connect_device_async", __FUNCTION__); spice_usb_device_manager_connect_device_async(manager, device, NULL, NULL, NULL); } ====================================== During initialization I do get a few errors, which I suppose are due to spice-gtk attempting to read USB devices directly, but I am not certain: ====================================== 2021-12-21 02:13:59.761 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:286 New session (compiled from package spice-gtk 0.39.4-ce0b8) 2021-12-21 02:13:59.762 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:290 Supported channels: main, display, inputs, cursor, playback, record, usbredir 2021-12-21 02:13:59.765 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/usb-device-manager.c:391 auto-connect filter set to 0x03,-1,-1,-1,0|-1,-1,-1,-1,1 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE W/GLib+android-spice: Error initializing LIBUSB support: Input/Output Error [-1] 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE E/GLib+android-spice: spice_usb_backend_deregister_hotplug: assertion 'be != NULL' failed 2021-12-21 02:13:59.762 3011-3011/com.iiordanov.aSPICE W/Thread-4: type=1400 audit(0.0:1572): avc: denied { read } for name="usb" dev="tmpfs" ino=1397419 scontext=u:r:untrusted_app:s0:c181,c257,c512,c768 tcontext=u:object_r:usb_device:s0 tclass=dir permissive=0 app=com.iiordanov.aSPICE 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:1578 Could not initialize SpiceUsbDeviceManager - Error initializing LIBUSB support: Input/Output Error [-1] 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/usb-device-manager.c:391 auto-connect filter set to 0x03,-1,-1,-1,0|-1,-1,-1,-1,1 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE W/GLib+android-spice: Error initializing LIBUSB support: Input/Output Error [-1] 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE E/GLib+android-spice: spice_usb_backend_deregister_hotplug: assertion 'be != NULL' failed 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE W/GLib+android-spice: Error initializing LIBUSB support: Input/Output Error [-1] 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:1578 Could not initialize SpiceUsbDeviceManager - Error initializing LIBUSB support: Input/Output Error [-1] 2021-12-21 02:13:59.766 3011-3060/com.iiordanov.aSPICE W/GLib+android-spice: Error initializing LIBUSB support: Input/Output Error [-1] ====================================== The rest of the log looks very encouraging, save for the fact that no device is attached to the remote. The same device does attach when I use spicy from my laptop to the same VM. Here is the log that is output from the above code and subsequently by spice-gtk: ====================================== 2021-12-21 02:13:59.957 3011-3060/com.iiordanov.aSPICE D/SpiceCommunicator: Passing fd: 85 to SPICE for device: UsbDevice[mName=/dev/bus/usb/001/002,mVendorId=7741,mProductId=8338,mClass=0,mSubclass=0,mProtocol=0,mManufacturerName=CBM ,mProductName=Flash Disk ,mVersion=1.00,mSerialNumberReader=android.hardware.usb.IUsbSerialReader$Stub$Proxy@ecfcac3, mHasAudioPlayback=false, mHasAudioCapture=false, mHasMidi=false, mHasVideoCapture=false, mHasVideoPlayback=false, mConfigurations=[ UsbConfiguration[mId=1,mName=null,mAttributes=128,mMaxPower=50,mInterfaces=[ UsbInterface[mId=0,mAlternateSetting=0,mName=null,mClass=8,mSubclass=6,mProtocol=80,mEndpoints=[ UsbEndpoint[mAddress=1,mAttributes=2,mMaxPacketSize=512,mInterval=0] UsbEndpoint[mAddress=129,mAttributes=2,mMaxPacketSize=512,mInterval=0]]]] 2021-12-21 02:13:59.957 3011-3060/com.iiordanov.aSPICE D/android-service: Java_com_undatech_opaque_SpiceCommunicator_SpiceSetNativeFileDescriptor: start 2021-12-21 02:13:59.957 3011-3060/com.iiordanov.aSPICE D/android-service: Java_com_undatech_opaque_SpiceCommunicator_SpiceSetNativeFileDescriptor: calling libusb_wrap_sys_device 2021-12-21 02:13:59.958 3011-3060/com.iiordanov.aSPICE D/android-service: Java_com_undatech_opaque_SpiceCommunicator_SpiceSetNativeFileDescriptor: calling allocate_backend_device 2021-12-21 02:13:59.958 3011-3060/com.iiordanov.aSPICE D/android-service: Java_com_undatech_opaque_SpiceCommunicator_SpiceSetNativeFileDescriptor: calling spice_usb_device_manager_get 2021-12-21 02:13:59.956 3011-3011/com.iiordanov.aSPICE W/Thread-4: type=1400 audit(0.0:1578): avc: denied { read } for name="usb" dev="tmpfs" ino=1397419 scontext=u:r:untrusted_app:s0:c181,c257,c512,c768 tcontext=u:object_r:usb_device:s0 tclass=dir permissive=0 app=com.iiordanov.aSPICE 2021-12-21 02:13:59.958 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/usb-device-manager.c:391 auto-connect filter set to 0x03,-1,-1,-1,0|-1,-1,-1,-1,1 2021-12-21 02:13:59.960 3011-3060/com.iiordanov.aSPICE D/android-service: Java_com_undatech_opaque_SpiceCommunicator_SpiceSetNativeFileDescriptor: Attaching device via spice_usb_device_manager_connect_device_async 2021-12-21 02:13:59.960 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/usb-device-manager.c:1103 connecting device 0x70efaf1490 2021-12-21 02:13:59.960 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/channel-usbredir.c:344 usbredir-9:0: connecting device 1e3d:2092 (0x70efaf1490) to channel 0x725fae4540 2021-12-21 02:13:59.960 3011-3079/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2921 test cap 1 in 0x1052: yes 2021-12-21 02:13:59.961 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2703 usbredir-9:0: Open coroutine starting 0x725fae4540 2021-12-21 02:13:59.962 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2540 usbredir-9:0: Started background coroutine 0x725fae43f8 2021-12-21 02:13:59.962 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2265 usbredir-9:0: Using plain text, port 6001 2021-12-21 02:13:59.962 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2703 usbredir-9:1: Open coroutine starting 0x725fae4340 2021-12-21 02:13:59.963 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2540 usbredir-9:1: Started background coroutine 0x725fae41f8 2021-12-21 02:13:59.963 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2265 usbredir-9:1: Using plain text, port 6001 2021-12-21 02:13:59.965 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2196 open host MYHOST:6001 2021-12-21 02:13:59.965 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2118 usbredir-9:0: connecting 0x709fb7aaf0... 2021-12-21 02:13:59.965 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2196 open host MYHOST:6001 2021-12-21 02:13:59.966 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2118 usbredir-9:1: connecting 0x709fa7caf0... 2021-12-21 02:13:59.992 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2102 usbredir-9:0: connect ready 2021-12-21 02:13:59.992 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1372 usbredir-9:0: channel type 9 id 0 num common caps 1 num caps 1 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1396 usbredir-9:0: Peer version: 2:2 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1952 usbredir-9:0: spice_channel_recv_link_msg: 2 caps 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1966 usbredir-9:0: got remote common caps: 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1902 0:0xB 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1973 usbredir-9:0: got remote channel caps: 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1902 0:0x1 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2921 test cap 0 in 0xB: yes 2021-12-21 02:14:00.002 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2921 test cap 1 in 0xB: yes 2021-12-21 02:14:00.003 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2921 test cap 3 in 0xB: yes 2021-12-21 02:14:00.003 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2005 usbredir-9:0: use mini header: 1 2021-12-21 02:14:00.003 3011-3060/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-session.c:2102 usbredir-9:1: connect ready 2021-12-21 02:14:00.003 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1372 usbredir-9:1: channel type 9 id 1 num common caps 1 num caps 1 2021-12-21 02:14:00.005 3011-3115/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1303 usbredir-9:0: channel up, state 3 2021-12-21 02:14:00.013 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1396 usbredir-9:1: Peer version: 2:2 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1952 usbredir-9:1: spice_channel_recv_link_msg: 2 caps 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1966 usbredir-9:1: got remote common caps: 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1902 0:0xB 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1973 usbredir-9:1: got remote channel caps: 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1902 0:0x1 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2921 test cap 0 in 0xB: yes 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2921 test cap 1 in 0xB: yes 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2921 test cap 3 in 0xB: yes 2021-12-21 02:14:00.014 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:2005 usbredir-9:1: use mini header: 1 2021-12-21 02:14:00.018 3011-3116/com.iiordanov.aSPICE D/GLib+GSpice: ../src/spice-channel.c:1303 usbredir-9:1: channel up, state 3 ====================================== Your help and suggestions are highly appreciated! Sincerely, iordan On Mon, Dec 20, 2021 at 5:57 AM Uri Lublin <uril@xxxxxxxxxx> wrote: > > Hi iordan, > > On Mon, Dec 20, 2021 at 9:46 AM i iordanov <iiordanov@xxxxxxxxx> wrote: > > > > Hi guys, > > > > I saw that the developers at libusb have done a bunch of work to > > support accessing USB devices on unrooted Android devices, and in > > response to a user request, I decided to look into the current state > > of the implementation. > > Congrats to libusb developers. > > > > > I am able to obtain permissions and get both: > > > > libusb_device *dev > > > > and > > > > libusb_device_handle *handle > > > > for an attached USB stick, but now do not have a good idea how to > > request libspice to attach the device to the remote. > > > > Is there an API exposed that would permit me to attach devices by > > either libusb_device or libusb_device_handle? In either case, any > > pointers on how to accomplish this are welcome! > > On the client side, you need to build usbredir and rebuild spice-gtk > with usbredir enabled. > > On the server side you need to build usbredir and rebuild Qemu with > usbredir enabled. > You also need to add to your VM configuration some USB devices and > attach them to SPICE. > See SPICE User Manual [1] "USB redirection" for details. > > [1] https://www.spice-space.org/spice-user-manual.html > > Regards, > Uri. > > > > > Sincerely, > > iordan > > > > -- > > The conscious mind has only one thread of execution. > > > -- The conscious mind has only one thread of execution.