Hi, I think indoor/outdoor hint is currently only set by hostapd (see phy_info_freq function at driver_nl80211_capa.c). The entire implementation is based on US FCC regulations which allows passive scanning. https://apps.fcc.gov/eas/comments/GetPublishedDocument.html?id=327&tn=528122 I am curious how it is defined in EU RED. Best Regards Marcin Sielski pt., 21 gru 2018 o 17:25 Kurt Van Dijck <dev.kurt@xxxxxxxxxxxxxxxxxxxxxx> napisał(a): > > Hey all, > > I work on a project for an outdoor device equipped with a Ralink wifi > key. In order to get certified in Japan, we should be able to proof that > the device is not using the 5.2GHz bands since this band is limited to > indoor use only in Japan. > As I understood, 5.4GHz and up are allowed. > > My first, rather rough, approach is to specify all 2.4GHz bands in > wpa_supplicant's global 'freq_list' parameter. > We found that our device still connect to 5GHz networks, I believe > because passive scanning allows 5GHz networks to be detected anyway. > > 2nd attempt, on top of the 1st, is to patch wpa_supplicant with: > > diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c > index 37d429d..c32aa1a 100644 > --- a/wpa_supplicant/events.c > +++ b/wpa_supplicant/events.c > @@ -1223,6 +1223,13 @@ struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s, > continue; > } > > + if (!freq_allowed(wpa_s->conf->freq_list, bss->freq)) { > + wpa_msg(wpa_s, MSG_INFO, > + "frequency %u excluded", bss->freq); > + wpa_dbg(wpa_s, MSG_DEBUG, > + " skip - avoid this frequency"); > + continue; > + } > if (!freq_allowed(ssid->freq_list, bss->freq)) { > if (debug_print) > wpa_dbg(wpa_s, MSG_DEBUG, > > In short, this enforces wpa_supplicant to honor the global freq_list > parameter for joining accesspoints, as it does for per-network > freq_lists. > > Is this sufficient to avoid our chip to send on 5GHz band? > > I also noticed some NO-OUTDOOR specifiers in the wireless regdb, > but not on the 5.2GHz bands for Japan. > I'm in the position to find out those details, and I'm willing to amend > in the upstream repository. > I do not yet see however how I can tell the kernel that it should limit > wifi regulation to outdoor use only. There seems no simple 'iw reg set > outdoor' or similar command. How is this done? > > Thanks for your responses in advance, > Kurt
