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+***********************
+num2ipv4() / ipv42num()
+***********************
+
+Purpose
+=======
+
+num2ipv4
+--------
+
+num2ipv4(int)
+
+Converts an integer into an IPv4-address and returns the address as string.
+Input is an integer with a value between 0 and 4294967295. The output format
+is '>decimal<.>decimal<.>decimal<.>decimal<' and '-1' if the integer input is
+invalid or if the function encounters a problem.
+
+
+ipv42num
+--------
+
+ipv42num(str)
+
+Converts an IPv4-address into an integer and returns the integer. Input is
+a string; the expected address format may include spaces in the beginning
+and end, but must not contain any other characters in between (except dots).
+If the format does include these, the function results in an error and returns -1.
+
+
+Example
+=======
+
+num2ipv4
+--------
+
+This example shows an integer being converted to an ipv4 address.
+
+.. code-block:: none
+
+   num2ipv4(123456)
+
+
+ipv42num
+--------
+
+This example shows the parameter fromhost-ip being converted to an integer.
+
+.. code-block:: none
+
+   ipv42num($fromhost-ip)
+
+