+ local ifname="$3"
+
+ # execute in subshell to not taint callers env
+ # see tickets #11046, #11545, #11570
+ (
+ json_init
+ json_add_int action 6
+ json_add_string host "$host"
+ [ -n "$ifname" ] && json_add_string ifname "$ifname"
+ _proto_notify "$interface" -S
+ )