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diff --git a/lib/inets/src/inets_app/inets_lib.erl b/lib/inets/src/inets_app/inets_lib.erl
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2015-2015. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-module(inets_lib).
+
+-export([millisec_passed/1, formated_timestamp/0, format_timestamp/1]).
+
+
+
+%% Help function, elapsed milliseconds since T0
+millisec_passed({_,_,_} = T0 ) ->
+    %% OTP 17 and earlier
+    timer:now_diff(inets_time_compat:timestamp(), T0) div 1000;
+
+millisec_passed(T0) ->
+    %% OTP 18
+    erlang:convert_time_unit(erlang:monotonic_time() - T0,
+			     native,
+			     micro_seconds) div 1000.
+
+%% Return formated time stamp (e.g. 2015:03:16 10:05:23 1234)
+formated_timestamp() ->
+    format_timestamp( os:timestamp() ).
+
+%% Return formated time stamp (e.g. 2015:03:16 10:05:23 1234)
+format_timestamp({_N1, _N2, N3} = Tme) ->
+    {Date, Time}   = calendar:now_to_datetime(Tme),
+    {YYYY,MM,DD}   = Date,
+    {Hour,Min,Sec} = Time,
+    FormatDate =
+        io_lib:format("~.4w:~.2.0w:~.2.0w ~.2.0w:~.2.0w:~.2.0w 4~w",
+                      [YYYY,MM,DD,Hour,Min,Sec,round(N3/1000)]),
+    lists:flatten(FormatDate).