1 files changed, 99 insertions, 0 deletions
diff --git a/lib/kernel/test/socket_client.erl b/lib/kernel/test/socket_client.erl
new file mode 100644
index 0000000000..6d74d19442
--- /dev/null
+++ b/lib/kernel/test/socket_client.erl
@@ -0,0 +1,99 @@
+%%%-------------------------------------------------------------------
+%%% @author Micael Karlberg <[email protected]>
+%%% @copyright (C) 2018, Micael Karlberg
+%%% @doc
+%%%
+%%% @end
+%%% Created : 27 Jun 2018 by Micael Karlberg <[email protected]>
+%%%-------------------------------------------------------------------
+-module(client).
+
+-export([start/1]).
+
+start(Port) ->
+    start_tcp(Port).
+
+start_tcp(Port) ->
+    start(inet, stream, tcp, Port).
+
+start(Domain, Type, Proto, Port) ->
+    try do_init(Domain, Type, Proto) of
+        Sock ->
+            connect(Sock, Domain, Port)
+    catch
+        throw:E:P ->
+            e("Failed initiate: "
+              "~n   Error: ~p"
+              "~n   Path:  ~p", [E, P])
+    end.
+
+do_init(Domain, Type, Proto) ->
+    i("try (socket) open"),
+    Sock = case socket:open(Domain, Type, Proto) of
+               {ok, S} ->
+                   S;
+               {error, OReason} ->
+                   throw({open, OReason})
+           end,
+    i("try (socket) bind"),
+    case socket:bind(Sock, any) of
+        {ok, _P} ->
+            Sock;
+        {error, BReason} ->
+            throw({bind, BReason})
+    end.
+
+which_addr(Domain) ->
+    Iflist = case inet:getifaddrs() of
+                 {ok, IFL} ->
+                     IFL;
+                 {error, Reason} ->
+                     throw({inet,getifaddrs,Reason})
+             end,
+    which_addr(Domain, Iflist).
+
+
+connect(Sock, Domain, Port) ->
+    Addr = which_addr(Domain),
+    SA = #{family => Domain,
+           addr   => Addr,
+           port   => Port},
+    i("try (socket) connect to ~p", [SA]),
+    case socket:connect(Sock, SA) of
+        ok ->
+            i("connected"),
+            ok;
+        {error, Reason} ->
+            e("connect failure: "
+              "~n   ~p", [Reason]),
+            exit({connect, Reason})
+    end.
+
+
+which_addr(_Domain, []) ->
+    throw(no_address);
+which_addr(Domain, [{Name, IFO}|_IFL]) when (Name =/= "lo") ->
+    which_addr2(Domain, IFO);
+which_addr(Domain, [_|IFL]) ->
+    which_addr(Domain, IFL).
+
+which_addr2(inet = _Domain, [{addr, Addr}|_IFO]) when (size(Addr) =:= 4) ->
+    Addr;
+which_addr2(inet6 = _Domain, [{addr, Addr}|_IFO]) when (size(Addr) =:= 8) ->
+    Addr;
+which_addr2(Domain, [_|IFO]) ->
+    which_addr2(Domain, IFO).
+
+
+
+e(F, A) ->
+    p("<ERROR> " ++ F, A).
+
+i(F) ->
+    i(F, []).
+i(F, A) ->
+    p("*** " ++ F, A).
+    
+p(F, A) ->
+    io:format("[client] " ++ F ++ "~n", A).
+