2 files changed, 8 insertions, 0 deletions
diff --git a/src/common/ieee802_11_common.c b/src/common/ieee802_11_common.c
index ed8d4661..aca0b732 100644
--- a/src/common/ieee802_11_common.c
+++ b/src/common/ieee802_11_common.c
@@ -826,6 +826,13 @@ int ieee80211_chan_to_freq(const char *country, u8 op_class, u8 chan)
 }
 
 
+int ieee80211_is_dfs(int freq)
+{
+	/* TODO: this could be more accurate to better cover all domains */
+	return (freq >= 5260 && freq <= 5320) || (freq >= 5500 && freq <= 5700);
+}
+
+
 static int is_11b(u8 rate)
 {
 	return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16;
diff --git a/src/common/ieee802_11_common.h b/src/common/ieee802_11_common.h
index 05fe32b4..7f0b296d 100644
--- a/src/common/ieee802_11_common.h
+++ b/src/common/ieee802_11_common.h
@@ -108,6 +108,7 @@ int hostapd_config_wmm_ac(struct hostapd_wmm_ac_params wmm_ac_params[],
 			  const char *name, const char *val);
 enum hostapd_hw_mode ieee80211_freq_to_chan(int freq, u8 *channel);
 int ieee80211_chan_to_freq(const char *country, u8 op_class, u8 chan);
+int ieee80211_is_dfs(int freq);
 
 int supp_rates_11b_only(struct ieee802_11_elems *elems);