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Re: [PATCH] nl80211: Provide per channel maximum regulatory transmit power

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On Wed, 2013-10-02 at 09:43 +0200, Helmut Schaa wrote:
> In some cases its not only required to know the maximum transmit power
> the hw is capable of. Instead, userspace (hostapd) might want to know
> the maximum transmit power as defined in the current regulatory domain
> (for example for 802.11d country IEs).

Why wouldn't it use (the equivalent of) "iw reg get" for that?


> +	if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_REG_TX_POWER,
> +			DBM_TO_MBM(chan->max_reg_power)))
> +		goto nla_put_failure;

This would have to go into the "if (large)" part because otherwise older
userspace can't read the info at all since it overflows the buffer.

johannes

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