1 files changed, 94 insertions, 0 deletions
diff --git a/erts/emulator/test/esock_misc/esock_iow_client.erl b/erts/emulator/test/esock_misc/esock_iow_client.erl
new file mode 100644
index 0000000000..3e48a8f300
--- /dev/null
+++ b/erts/emulator/test/esock_misc/esock_iow_client.erl
@@ -0,0 +1,94 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2020-2020. 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%
+%%
+
+%% ---------------------------------------------------------------------
+%%
+%% Writes small messages to a socket, until counters wrap!
+%%
+%% ---------------------------------------------------------------------
+
+-module(esock_iow_client).
+
+-export([start/1]).
+
+-define(LIB,   esock_iow_lib).
+-define(LIMIT, 100000).
+
+-define(MSG, <<"abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz"
+               "abcdefghijklmnopqrstuvxyz">>).
+
+
+%% ---------------------------------------------------------------------
+
+start(ServerPort) ->
+    Domain  = inet,
+    ?LIB:iprint("open"),
+    {ok, S} = socket:open(Domain, stream, tcp),
+    ?LIB:iprint("iow"),
+    ok = socket:setopt(S, otp, iow, true),
+    ?LIB:iprint("bind"),
+    LocalSA = #{family => Domain,
+                addr   => {147,214,93,147}},
+    {ok, _} = socket:bind(S, LocalSA),
+    ?LIB:iprint("connect (to ~w)", [ServerPort]),
+    ServerSA = LocalSA#{port => ServerPort},
+    ok      = socket:connect(S, ServerSA),
+    ?LIB:iprint("connected - now await begin"),
+    case socket:recv(S, 0, infinity) of
+        {ok, <<"begin">>} ->
+            ?LIB:iprint("begin"),
+            loop(S, 0);
+        {error, Reason} ->
+            ?LIB:eprint("failed receive begin: ~p", [Reason])
+    end.
+
+loop(S, N) ->
+    ok = socket:send(S, ?MSG),
+    NextN = receive
+                {'$socket', S, counter_wrap, Cnt} ->
+                    ?LIB:iprint("Counter ~w wrapped", [Cnt]),
+                    N + 1;
+                Any ->
+                    ?LIB:iprint("Received: ~n   ~p~n", [Any]),
+                    N + 1
+            after 1 ->
+                    if (N < ?LIMIT) ->
+                            N+1;
+                       true ->
+                            ?LIB:iprint("Counters:"
+                                        "~s", [?LIB:format_counters(cnts(S))]),
+                            0
+                    end
+            end,
+    loop(S, NextN).
+
+
+cnts(S) ->
+    #{counters := Cnts} = socket:info(S),
+    Cnts.
+