Re: [PATCH 6/6] cfg80211: enable 5 GHz band for world regulatory domain

["Johannes Berg" <johannes@sipsolutions.net>]

Luis R. Rodriguez wrote:
> Technically speaking since some countries do not support
> some channels in 5 GHz the world regulatory domain should not
> use them however APs should *not* be shipped in those countries
> which don't allow 5 GHz operation. Because of this we can
> safely assume we operate correctly in STA mode by forcing
> passive scan and disabling ad-hoc in 5 GHz. We leave out
> all DFS channels as we don't support DFS yet.

No,  this is incorrect. The linux kernel can well act as an AP.

> Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
> ---
>  net/wireless/reg.c |   12 +++++++++++-
>  1 files changed, 11 insertions(+), 1 deletions(-)
>
> diff --git a/net/wireless/reg.c b/net/wireless/reg.c
> index dd1020b..ce0c730 100644
> --- a/net/wireless/reg.c
> +++ b/net/wireless/reg.c
> @@ -85,7 +85,11 @@ static u32 supported_bandwidths[] = {
>   * information to give us an alpha2 */
>  static const struct ieee80211_regdomain *cfg80211_regdomain;
>
> -/* We keep a static world regulatory domain in case of the absence of
> CRDA */
> +/* We keep a static world regulatory domain in case of the absence of
> CRDA.
> + * Although some countries disable 5 GHz completely it is up to the APs
> + * sold in those countries to not beacon, we can safely passive scan
> though
> + * on non DFS channels. We don't support yet DFS so don't include DFS
> + * channels yet (5260 MHz - 5700 MHz) */
>  static const struct ieee80211_regdomain world_regdom = {
>  	.n_reg_rules = 1,
>  	.alpha2 =  "00",
> @@ -93,6 +97,12 @@ static const struct ieee80211_regdomain world_regdom =
> {
>  		REG_RULE(2412-10, 2462+10, 40, 6, 20,
>  			NL80211_RRF_PASSIVE_SCAN |
>  			NL80211_RRF_NO_IBSS),
> +		REG_RULE(5170, 5260, 40, 6, 20,
> +			NL80211_RRF_PASSIVE_SCAN |
> +			NL80211_RRF_NO_IBSS),
> +		REG_RULE(5700, 5835, 40, 6, 20,
> +			NL80211_RRF_PASSIVE_SCAN |
> +			NL80211_RRF_NO_IBSS),
>  	}
>  };
>
> --
> 1.5.6.3
>
> --
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