Using connman with iwd is impossible due to incorrect assertion

[ilya-fedin]

Issue description

connman built with iwd: https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/networking/connman/default.nix#L47
But module contains assertion that returns error when wpa_supplicant is disabled (enabling iwd disables wpa_supplicant):

nixpkgs/nixos/modules/services/networking/connman.nix

Line 76 in 63a0988

assertion = config.networking.wireless.enable;

[eadwu]

In master, the only supported way to use iwd is to use it as a standalone wireless daemon. Even if you assertion was disabled, it wouldn't make a difference, since the configurations don't allow for iwd to connect to connman. The default iwd.service is setup for dbus which differs from the one that is required [1]. Though it does look like it's relatively easy to enable iwd integration with the addition of two services, for now it might be better to just override the module manually on your local configuration.

[1] https://wiki.archlinux.org/index.php/ConnMan#Using_iwd_instead_of_wpa_supplicant

[dtzWill]

If someone ends up putting together the needed bits, please share (probably as a PR)!

Ive kludged network-manager into using iwd (kludge is needed for similar assertion and to not run iwd standalone, IIRC) but I'm keen to give connman a try :).

[stellarhoof]

FYI guys, ConnMan doesn't really keep up to date with iwd and integration between the two might lead to frustration. See

• No iwd scan integration and https://wiki.archlinux.org/index.php/ConnMan#Error_/net/connman/technology/wifi:_Not_supported
• iwd issues in connman bug tracker

The best bet for now is to use network manager with iwd (#51803)

[ilya-fedin]

NetworkManager is ugly and buggy

[stellarhoof]

I've been also using iwd without network manager or connman just fine.

[ilya-fedin]

I'm thinking of writing a GUI for iwd - to use iwd + dhcpcd

[doronbehar]

Heads up for anyone interested iwd 1.0 was released with breaking changes, refs:

• [WIP] iwd: 0.22 -> 1.0 #72321
• https://lists.01.org/hyperkitty/list/[email protected]/thread/OHP4UPBDN7LJ7MVUETL4DVM776YFFGLD/