[BUG] connman: DNS broken

[3nprob]

Describe the bug

It seems to me that DNS support for Wireguard VPN is not working.

To Reproduce

Connect to Wireguard VPN when already connected to DHCP-enabled wifi network:

$ cat /storage/.config/wireguard/myvpn.config
[provider_wireguard]
Type = WireGuard
Name = WireGuard VPN Tunnel
Host = 1.2.3.4
Wireguard.Address = 10.1.100.121/24
Wireguard.ListenPort = 1234
Wireguard.PrivateKey = foo
Wireguard.PublicKey = bar
Wireguard.PresharedKey = baz
Wireguard.DNS = 10.1.100.2
Wireguard.AllowedIPs = 10.1.100.0/24
Wireguard.EndpointPort = 2345
Wireguard.PersistentKeepalive = 30

$ connmanctl  connect vpn_1_2_3_4
Connected vpn_1_2_3_4

$ wg
## Connected, data transfering in both directions.

$ nslookup foo.mydomain.com 
(does not work, looks up using ISP DNS acquired via DHCP)

$ nslookup foo.mydomain.com 10.1.100.2
(resolves correctly)

$ cat /etc/resolv.conf
# Generated by Connection Manager
nameserver $ISP_DHCP_DNS

So it seems connman ignores the desired DNS from wireguard.

I suspect the -r here is the reason:

LibreELEC.tv/packages/network/connman/system.d/connman.service

Line 15 in acc9f05

ExecStart=/bin/sh -c ". /usr/lib/connman/connman-setup; exec /usr/sbin/connmand -nr $CONNMAN_MAIN $CONNMAN_DEBUG"

If the -r is removed, connman would instead run a local DNS proxy and keep track of DNS config properly.

It would be great if at the very least this could be made overridable by env vars (or just re-enable connman's built-in DNS functionality?)

Informations

• LE Version: 10.0.1
• Hardware Platform: Rpi400

[3nprob]

Overriding connman.service with a version sans -r and DNS over VPN works as expected