On Tue, Feb 12, 2019 at 3:41 AM James Prestwood <james.prestwood@xxxxxxxxxxxxxxx> wrote: > > On Fri, 2019-02-08 at 12:08 -0800, James Prestwood wrote: > > Hi, > > > > I am trying to create a VHT capable radio with mac80211_hwsim, to be > > used with hostapd. I have tried a few configs in > > tests/hwsim/test_ap_vht.py but all that I have tried result in > > hostapd > > complaining about the channel e.g. > > > > Channel 36 (primary) not allowed for AP mode, flags: 0x853 NO-IR > > wln2: IEEE 802.11 Configured channel (36) not found from the channel > > list of current mode (2) IEEE 802.11a > > wln2: IEEE 802.11 Hardware does not support configured channel > > > > I have tried a few channels, none of which work. This makes me think > > it > > has to do with how I am creating the radio with mac80211_hwsim. I'm > > just creating an essentially 'default' radio (no special attributes). > > I've looked through the hwsim driver code and it appears that all > > radios created set some VHT capability bits (the for loop iterating > > over NUM_NL80211_BANDS) so any hwsim radio should support VHT > > (right?). > > None of the HWSIM_ATTR's seem to point anything related to VHT > > either. > > > > Here is (one of) the config I've tried: > > > > ssid=testSSID > > country_code=DE > > hw_mode=a > > channel=36 > > ieee80211n=1 > > ieee80211ac=1 > > vht_oper_chwidth=0 > > vht_oper_centr_freq_seg0_idx=0 > > supported_rates=60 120 240 360 480 540 > > require_vht=1 > > > > Thanks, > > James > > I still have not resolved this, though I have a bit more info that > hopefully someone can make use of. (Thanks to Johannes) I believe this > issue has to do with the regulatory domain. In my VM, if I run "iw reg > get" I see that my country is set to '00'. This country code seems to > restrict the VHT channels. I tried changing this with "iw reg set US", > but this does not actually result in the country changing (also a > common-ish problem I have found online). I have noticed a few things > after looking closer at the logs: > > Kernel Boot: > [ 0.393391] cfg80211: Loading compiled-in X.509 certificates for > regulatory database > [ 0.394742] cfg80211: Loaded X.509 cert 'sforshee: > 00b28ddf47aef9cea7' > [ 0.395648] platform regulatory.0: Direct firmware load for > regulatory.db failed with error -2 > [ 0.396819] cfg80211: failed to load regulatory.db > Without this database we cannot configure reg domains. Can you try copyng regulatory.db from https://mirrors.edge.kernel.org/pub/software/network/wireless-regdb/ in to /lib/firmware/? Then you should see the above failure should be resolved. > > I also see hostapd trying to change the country code (since I set it in > the config): > Previous country code 00, new country code US > Continue interface setup after channel list update > > But soon after: > Channel list update timeout - try to continue anyway > > So it appears to be either cfg80211 or mac80211_hwsim that is > restricting the channels hostapd is allowed to use. I see in > mac80211_hwsim there is an attribute HWSIM_ATTR_REG_HINT_ALPHA2. > I have tried using that, setting to "US", but this does not result in > the VM's country code changing (either from boot or after iw reg set > US). > > I have tried also running the hostapd hwsim tests directly following: > https://w1.fi/cgit/hostap/plain/tests/hwsim/vm/example-vm-setup.txt > > But after ./vm-run.sh all I get is wpa_supplicant usage prints (as if > it was being started with invalid arguments or something) and: > Failed to connect to wpa_supplicant global interface: /tmp/wpas- > wlan0 error: No such file or directory > > Should it be this hard to use VHT in hostapd? > > Thanks, > James > > > > > _______________________________________________ > Hostap mailing list > Hostap@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/hostap -- Thanks, Regards, Chaitanya T K. _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
