implemented skeleton of ntp servers parsing. fate#323454

src/lib/network/wicked.rb

@@ -16,5 +16,16 @@ def reload_config(devs)
 
       SCR.Execute(BASH_PATH, "wicked ifreload #{devs.join(" ")}").zero?
     end
+
+    # Parses wicked runtime configuration and returns list of ntp servers
+    #
+    # @param iface [String] network device
+    # @return [Array<String>] list of NTP servers
+    def parse_ntp_servers(iface)
+      raise ArgumentError, "A network device has to be specified" if iface.nil? || iface.empty?
+      raise RuntimeError, "Parsing NTP Servers not supported for network service in use" if !NetworkService.is_wicked
+
+      []
+    end
   end
 end

src/modules/LanItems.rb

@@ -2540,6 +2540,19 @@ def clear_set_hostname
       ret
     end
 
+    # Returns hash of NTP servers
+    #
+    # Provides map with NTP servers obtained via any of dhcp aware interfaces
+    #
+    # @return [Hash<String, Array<String>] key is device name, value
+    #                                      is list of ntp servers obtained from the device
+    def dhcp_ntp_servers
+      dhcp_ifaces = find_dhcp_ifaces
+
+      result = dhcp_ifaces.map { |iface| [iface, parse_ntp_servers(iface)] }.to_h
+      result.delete_if { |iface, ntps| ntps.empty? }
+    end
+
     # This helper allows YARD to extract DSL-defined attributes.
     # Unfortunately YARD has problems with the Capitalized ones,
     # so those must be done manually.