Answering this myself as I found the solution for my problem for futher reference: On Thu, 2022-07-21 at 18:30 +0200, Dylan Van Assche wrote: > Hi, > > I'm trying to setup a Bluetooth hotspot using NAP with BlueZ and > NetworkManager. However, I cannot fix the following error: > > bnep: Can't add bnep0 to the bridge btnap0: Invalid argument(22) Turns out that the device I have here has incorrect MAC addresses for WiFi and Bluetooth. I could lay my hands on a different device and there bnep0 gets properly added to the bridge since the MAC addresses were not rejected by the Linux kernel bridge driver. > > I have created a network bridge as followed: > > brctl addbr btnap0 > > and used test-nap [1] as followed: > > test-nap btnap0 > > when the client connect, you can see in the logs that BlueZ tries to > link the bnep0 interface it is creating with the btnap0 bridge, but > fails to do that. > > Logs: > > profiles/network/server.c:confirm_event() BNEP: incoming connect from > XX:XX:XX:XX:XX:XX > profiles/network/bnep.c:bnep_getsuppfeat() supported features: 0x1 > profiles/network/bnep.c:bnep_add_to_bridge() bnep: Can't add bnep0 to > the bridge btnap0: Invalid argument(22) > profiles/network/server.c:bnep_setup() BNEP server cannot be added > > Environment: > > BlueZ 5.64 > postmarketOS edge / Alpine Linux (musl libc) > Qualcomm wcn3990 Bluetooth adaptor > Linux 5.18.3 (arm64) > > Did I miss something to set this up? > > Kind regards, > Dylan Van Assche > > [1] > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/test-nap Kind reagards, Dylan Van Assche
