static int parse_reg_rule(struct nlattr *tb[],
	struct ieee80211_reg_rule *reg_rule)
{
	struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
	struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;

	if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
		return -EINVAL;
	if (!tb[NL80211_ATTR_FREQ_RANGE_START])
		return -EINVAL;
	if (!tb[NL80211_ATTR_FREQ_RANGE_END])
		return -EINVAL;
	if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
		return -EINVAL;
	if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
		return -EINVAL;

	reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);

	freq_range->start_freq_khz =
		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
	freq_range->end_freq_khz =
		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
	freq_range->max_bandwidth_khz =
		nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);

	power_rule->max_eirp =
		nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);

	if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
		power_rule->max_antenna_gain =
			nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);

	return 0;
}
Unknown