Re: broadcom fmac ap mode testing - how to set iwd as dhcp server?

[James Prestwood <prestwoj@gmail.com>]

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Hi Keith,

<snip>
>  When I restart the AP from iwct, I can connect again. 
> What I do not yet know how to do, though, is assign an ip address to
> the ap and then have it be a dhcp server to serve out a dhcp address
> to the connecting computer. I found this online and took a stab, but
> it did not assign an address, though the computer did 'attach'.

Yes this is exactly the behavior we are seeing as well. I do have a
patch which fixes the disconnect issue and allows the same client to
connect again but we've actually got more problems than this. My recent
patches 'fixing' AP mode is somewhat of a hack in all honesty. It
allows the 4-way handshake to happen but not the GTK handshake. This
means no group traffic which breaks DHCP.

I won't bore you with details but it boils down to brcmfmac being (as
far as we can tell) broken when used this way. We are going to
investigate handshake offloading which might fix it, but we just don't
know yet. I am expecting offloading to work  but if not we need to talk
with linux-wireless/broadcom about why its broken or how it supposed to
work. Anyways, we hope to have this sorted soon.

FYI even hostapd exibits this exact same behavior with brcmfmac cards,
does the 4-way but no GTK handshake. At least on my brcmfmac cards. I
would be curious if it does the same for you.

> How do you set it up for iwd to be a dhcp server? If iwd cannot do
> it, can I use dhcpd? dnsmasq? I have found very little info in my
> searches. 

You're likely setting it up correctly (EnableNetworkConfiguration=true)
but we've got this GTK problem.

Thanks,
James

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