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Thulashitharan D
Asked: 2021-02-11 04:30:12 +0800 CST

How to use kde connect with a android qemu vm

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I have an android vm.I use qemu along with virgl for hardware acceleration.I had to build qemu from source for sdl and virgl support. I used the following build parameters

./configure --enable-sdl --enable-opengl --enable-virglrenderer --enable-system --enable-modules --audio-drv-list=pa --target-list=x86_64-softmmu --enable-kvm --enable-gtk --enable-spice

My build directory is

/home/username/builds/qemu/qemu/build/

My VM launch options are

./qemu-system-x86_64 -boot c -enable-kvm -smp 1 -name android -device virtio-vga,virgl=on -net nic -net user,hostfwd=tcp::4444-:5555 -cpu host -device ES1370 -m 1028 -display sdl,gl=on -hda /home/username/Documents/android.img -usb -usbdevice tablet -machine q35 -object rng-random,id=rng0,filename=/dev/urandom -device virtio-rng-pci,rng=rng0

I would like to connect to my VM and host using kde connect.I assume that requires setting up a bridge and tap ,tun stuff.It would be nice if some one could suggest a easy method to do the above. My ifconfig output

username@username-H81 ~ [1]> ifconfig
enp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.40  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::7288:16a8:48fe:99e4  prefixlen 64  scopeid 0x20<link>
        ether 00:e0:4c:c2:08:55  txqueuelen 1000  (Ethernet)
        RX packets 684976  bytes 626450094 (626.4 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 215101  bytes 23434472 (23.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 83058  bytes 67059421 (67.0 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 83058  bytes 67059421 (67.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

My host system - Kubuntu 20.10
Guest - android9 from android x86 with kernel 4.9

networking

1 Answers

  1. Found a easy script to set up tap interface.credits

    • First find the logical name of your network device In my case enp3s0.(run the command ifconfig and ls -la /sys/class/net/ to find out the logical name ignore the device with the name lo it is a loop back device)

    • Then run these remember to replace eth0 with the logical name of your network device name.

    sudo brctl addbr br0
sudo ip addr flush dev eth0
sudo brctl addif br0 eth0
sudo tunctl -t tap0 -u `whoami`
sudo brctl addif br0 tap0
sudo ifconfig eth0 up
sudo ifconfig tap0 up
sudo ifconfig br0 up
sudo dhclient -v br0

    • Launch vm with -netdev tap,id=mynet0,ifname=tap0,script=no,downscript=no -device e1000,netdev=mynet0,mac=52:55:00:d1:55:01

    • To make this changes permanent you have to save these changes to /etc/network/interfaces but i am not sure how.Any help on doing that would be appreciated

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