The latest hostapd and some of the wireless drivers support DFS, which
is required on the 5 GHz band in many countries. This patch adds the
correct option to the hostapd configuration if dfs=1 is set (along with
the country code) in the wireless configuration.

v2: refresh patch for netifd

Signed-off-by: Matti Laakso <malaakso at elisanet.fi>
---

Index: trunk/package/network/services/hostapd/files/netifd.sh
===================================================================
--- trunk/package/network/services/hostapd/files/netifd.sh      (revision 39585)
+++ trunk/package/network/services/hostapd/files/netifd.sh      (working copy)
@@ -51,7 +51,7 @@
        config_add_array basic_rate
 
        config_add_string country
-       config_add_boolean country_ie
+       config_add_boolean country_ie dfs
 
        hostapd_add_log_config
 }
@@ -63,14 +63,18 @@
        local base="${config%%.conf}"
        local base_cfg=
 
-       json_get_vars country country_ie beacon_int
+       json_get_vars country country_ie dfs beacon_int
 
        hostapd_set_log_options base_cfg
 
        set_default country_ie 1
+       set_default dfs 0
        [ -n "$country" ] && {
                append base_cfg "country_code=$country" "$N"
-               [ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
+               [ "$country_ie" -gt 0 ] && {
+                       append base_cfg "ieee80211d=1" "$N"
+                       [ "$dfs" -gt 0 ] && append base_cfg "ieee80211h=1" "$N"
+               }
        }
        [ -n "$hwmode" ] && append base_cfg "hw_mode=$hwmode" "$N"
 
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