Bug 1553453

I've got this partly working on Windows 10 Redstone 4 (Insider build 17115 - due to become the 2018 Spring Creators Update) with Fedora 27. Not perfect yet but already better.

= Recipe =

In the Fedora Workstation VM:

* Make sure you have kernel 4.15 or newer from Fedora 27 updates.
* echo "hv_sock" > /etc/modules-load.d/hv_sock.conf
* Set SELinux to permissive for now.
* Rebuild xrdp >= 0.9.5 with --enable-vsock (via SRPM) and install.
* systemctl enable xrdp

Edit /etc/xrdp/xrdp.ini to set:

use_vsock=true
security_layer=rdp
crypt_level=none
bitmap_compression=false

Edit /etc/xrdp/sesman.ini to set:

X11DisplayOffset=0

Create /etc/X11/Xwrapper.config and set:

allowed_users=anybody/g' /etc/X11/Xwrapper.config

* Power off the Fedora VM.


On the Windows 10 Host:

* Set-VM -VMName "Fedora Workstation" -EnhancedSessionTransportType HvSocket

* Start VM.


= Results =

* Have to log into xrdp every time you connect to the VM.
* Can resize desktop of Linux VM when establishing connection.
* Copy and Paste in and out of VM.
* Mouse latency issue is gone!
* Graphics still laggy.


= Todo =

* Re-enable SELinux via xrdp-selinux
* Work out if the colourd bits are needed.
* Audit the xrdp config changes for security implications (e.g. if VM is on net passthrough not nat).
* See if it's possible to remove the xrdp login.
* Look at other xrdp build optimisations.

Found many of the options needed in this:

https://github.com/jterry75/xrdp-init/blob/18_test/ubuntu/18.04/install.sh

Here's the SELinux alert it's generating at the moment:

SELinux is preventing xrdp from read access on the socket Unknown.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that xrdp should be allowed read access on the Unknown socket by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'xrdp' --raw | audit2allow -M my-xrdp
# semodule -X 300 -i my-xrdp.pp

Additional Information:
Source Context                system_u:system_r:unconfined_service_t:s0
Target Context                system_u:object_r:unlabeled_t:s0
Target Objects                Unknown [ socket ]
Source                        xrdp
Source Path                   xrdp
Port                          <Unknown>
Host                          localhost.localdomain
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-283.26.fc27.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain 4.15.6-300.fc27.x86_64
                              #1 SMP Mon Feb 26 18:43:03 UTC 2018 x86_64 x86_64
Alert Count                   9
First Seen                    2018-03-10 19:50:35 GMT
Last Seen                     2018-03-10 20:39:21 GMT
Local ID                      e04ec249-efb5-47f3-be28-ca44045e2242

Raw Audit Messages
type=AVC msg=audit(1520714361.329:287): avc:  denied  { read } for  pid=1367 comm="xrdp" scontext=system_u:system_r:unconfined_service_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1


Hash: xrdp,unconfined_service_t,unlabeled_t,socket,read

allowed_users=anybody/g' /etc/X11/Xwrapper.config

should be:

allowed_users=anybody

above.

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