Hi, On Wed, Nov 23, 2022 at 01:19:10PM +0000, 韩雪峰 wrote: > Hi Victor, > > Thanks for your solution. I just find 'usbredirtestclient' in > usbredir project, the client has the feature connect to > server(QEMU), and it could connect to server successfully, but > I cannot find how to redirect usb device from client to VM. It > seems that I need to write some code to redirect USB with > usbredir, right ? usbredirtestclient is a testing client, not what you want. Try usbredirect binary from usbredir-tools package (Fedora 37): https://koji.fedoraproject.org/koji/buildinfo?buildID=2088721 Or just compile usbredir project and test it out: $ git clone https://gitlab.freedesktop.org/spice/usbredir.git $ cd usbredir $ meson . build -Dtools=enabled $ ninja -C build $ sudo ./build/tools/usbredirect --to localhost:5550 --device 8644:8003 Cheers, Victor > > Thanks and Regards, > Xuefeng > > > -----邮件原件----- > 发件人: Victor Toso <victortoso@xxxxxxxxxx> > 发送时间: 2022年11月22日 16:45 > 收件人: 韩雪峰 <hanxuefeng@xxxxxx> > 抄送: Frediano Ziglio <freddy77@xxxxxxxxx>; spice-devel@xxxxxxxxxxxxxxxxxxxxx > 主题: Re: 答复: The second client cannot redirect USB > > Hi, > > On Mon, Nov 21, 2022 at 08:44:49AM +0000, 韩雪峰 wrote: > > Hi, > > Thanks for your reply. But If I want to support multiple channels for > > USB redirection when multiple clients connect to a same VM, do you > > know which project includes the code about USB > > channels ? Spice ? or QEMU? > > As Frediano pointed out, USB redirection with SPICE is bounded to the first connected SPICE client. > > You can reconfigure your VM to have a TCP backend for your USB devices, the libvirt change would look like this: > > <redirdev bus='usb' type='tcp'> > <source mode='bind' host='localhost' service='5550'/> > <protocol type='raw'/> > <address type='usb' bus='0' port='3'/> > </redirdev> > > And then, you can use usbredirect (from usbredir project) to redirect USB devices from multiple clients. > > Note that this is will use plain usbredir protocol over TCP, it isn't secure channel like what SPICE provides. > > Cheers, > Victor > > > Thanks and Regards, > > Xuefeng > > > > 发件人: Frediano Ziglio <freddy77@xxxxxxxxx> > > 发送时间: 2022年11月18日 20:52 > > 收件人: 韩雪峰 <hanxuefeng@xxxxxx> > > 抄送: spice-devel@xxxxxxxxxxxxxxxxxxxxx > > 主题: Re: The second client cannot redirect USB > > > > Il giorno ven 18 nov 2022 alle ore 10:21 韩雪峰 <hanxuefeng@xxxxxx<mailto:hanxuefeng@xxxxxx>> ha scritto: > > Hello, > > > > When I used two client to connect to a same one VM by spice > > with setting “SPICE_DEBUG_ALLOW_MC=1”, the two clients > > worked, and the first client could redirect USB. However, > > the second client could not redirect USB device, It shows > > like the picture: [cid:image001.png@01D8FDC6.C4D82080] > > > > I’m sure that there’re enough channels for USB redirection. > > > > Is this a problem? Or Is there any way that could resolve the second client’s USB redirection problem? > > > > Thanks and Regards, > > > > Xuefeng > > > > Currently all character device channels (including USB one) do not support multiple channels, so the first client takes them all. > > > > Frediano > >
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