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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+-module(ei_tmo_SUITE).
+
+-include("test_server.hrl").
+-include_lib("kernel/include/inet.hrl").
+-include("ei_tmo_SUITE_data/ei_tmo_test_cases.hrl").
+
+-define(dummy_host,test01).
+
+-export([all/1, init_per_testcase/2, fin_per_testcase/2,
+ framework_check/1, ei_accept_tmo/1, ei_connect_tmo/1, ei_send_tmo/1,
+ ei_recv_tmo/1]).
+
+all(suite) -> [framework_check,ei_accept_tmo,ei_connect_tmo,
+ ei_send_tmo,ei_recv_tmo].
+
+init_per_testcase(_Case, Config) ->
+ Dog = ?t:timetrap(?t:minutes(1)),
+ % test if platform is vxworks_simso
+ ?line {_,Host} = split(node()),
+ Bool = case atom_to_list(Host) of
+ [$v,$x,$s,$i,$m | _] -> true;
+ _ -> false
+ end,
+ [{vxsim,Bool},{watchdog, Dog}|Config].
+
+fin_per_testcase(_Case, Config) ->
+ Dog = ?config(watchdog, Config),
+ test_server:timetrap_cancel(Dog),
+ ok.
+
+framework_check(doc) ->
+ ["Check the framework."];
+framework_check(suite) ->
+ [];
+framework_check(Config) when is_list(Config) ->
+ %%dbg:tracer(),
+ %%dbg:p(self()),
+ ?line P = runner:start(?framework_check),
+ ?line runner:send_term(P,{hello,world}),
+ ?line {term, {hello,world}} = runner:get_term(P),
+ ?line runner:recv_eot(P),
+ ok.
+
+
+ei_recv_tmo(doc) ->
+ ["Check recv with timeouts."];
+ei_recv_tmo(suite) ->
+ [];
+ei_recv_tmo(Config) when is_list(Config) ->
+ ?line do_one_recv(c_node_recv_tmo_1),
+ ?line do_one_recv_failure(c_node_recv_tmo_2),
+ ok.
+
+
+do_one_recv(CNode) ->
+ ?line {_,Host} = split(node()),
+ ?line P1 = runner:start(?recv_tmo),
+ ?line runner:send_term(P1,{CNode,
+ erlang:get_cookie(),
+ node()}),
+ ?line {term, X} = runner:get_term(P1, 10000),
+ ?line true = is_integer(X),
+ ?line CNode1 = join(CNode,Host),
+ ?line Term1 = {hej,[hopp,{i,[lingon,"skogen"]}]},
+ ?line {test,CNode1} ! Term1,
+ ?line {term, Term1} = runner:get_term(P1, 10000),
+ ?line runner:recv_eot(P1).
+
+do_one_recv_failure(CNode) ->
+ ?line P1 = runner:start(?recv_tmo),
+ ?line runner:send_term(P1,{CNode,
+ erlang:get_cookie(),
+ node()}),
+ ?line {term, X} = runner:get_term(P1, 10000),
+ ?line true = is_integer(X),
+ ?line {term, {Ret,ETimedout,ETimedout}} = runner:get_term(P1, 10000),
+ ?line true = (Ret < 0),
+ ?line runner:recv_eot(P1).
+
+
+ei_send_tmo(doc) ->
+ ["Check send with timeouts."];
+ei_send_tmo(suite) ->
+ [];
+ei_send_tmo(Config) when is_list(Config) ->
+ %dbg:tracer(),
+ %dbg:p(self()),
+ VxSim = ?config(vxsim, Config),
+ ?line register(ei_send_tmo_1,self()),
+ ?line do_one_send(self(),c_node_send_tmo_1),
+ ?line do_one_send(ei_send_tmo_1,c_node_send_tmo_2),
+ ?line do_one_send_failure(self(),cccc1,c_nod_send_tmo_3,VxSim),
+ ?line do_one_send_failure(ei_send_tmo_1,cccc2,c_nod_send_tmo_4,VxSim),
+ ok.
+
+
+do_one_send(From,CNode) ->
+ ?line {_,Host} = split(node()),
+ ?line P1 = runner:start(?send_tmo),
+ ?line runner:send_term(P1,{CNode,
+ erlang:get_cookie(),
+ node()}),
+ ?line {term, X} = runner:get_term(P1, 10000),
+ ?line true = is_integer(X),
+ ?line CNode1 = join(CNode,Host),
+ ?line Term1 = {hej,[hopp,{i,[lingon,"skogen"]}]},
+ ?line {test,CNode1} ! {From,1,Term1},
+ ?line ok = receive
+ Term1 ->
+ ok
+ after 2000 ->
+ error
+ end,
+ ?line {term, 0} = runner:get_term(P1, 10000),
+ ?line runner:recv_eot(P1).
+
+do_one_send_failure(From,FakeName,CName,VxSim) ->
+ ?line {_,Host} = split(node()),
+ ?line OurName = join(FakeName,Host),
+ ?line Node = join(CName,Host),
+ ?line LSocket = case gen_tcp:listen(0, [{active, false}, {packet,2}]) of
+ {ok, Socket} ->
+ ?line Socket;
+ Else ->
+ ?line exit(Else)
+ end,
+ ?line EpmdSocket = register(OurName, LSocket, 1, 5),
+ ?line P3 = runner:start(?send_tmo),
+ ?line Cookie = kaksmula_som_ingen_bryr_sig_om,
+ ?line runner:send_term(P3,{CName,
+ Cookie,
+ OurName}),
+ ?line SocketB = case gen_tcp:accept(LSocket) of
+ {ok, Socket1} ->
+ ?line Socket1;
+ Else2 ->
+ ?line exit(Else2)
+ end,
+ ?line {hidden,Node,5} = recv_name(SocketB), % See 1)
+ ?line send_status(SocketB, ok),
+ ?line MyChallengeB = gen_challenge(),
+ ?line send_challenge(SocketB, OurName, MyChallengeB, 5),
+ ?line HisChallengeB = recv_challenge_reply(
+ SocketB,
+ MyChallengeB,
+ Cookie),
+ ?line DigestB = gen_digest(HisChallengeB,Cookie),
+ ?line send_challenge_ack(SocketB, DigestB),
+ ?line inet:setopts(SocketB, [{active, false},
+ {packet, 4}]),
+ ?line {term, X} = runner:get_term(P3, 10000),
+ ?line true = is_integer(X),
+ ?line Message = [112,term_to_binary({6,self(),'',test}),
+ term_to_binary({From,10000,
+ {app,["lapp",{sa,["att",du,{slapp,
+ sitta}]}]}})],
+ ?line gen_tcp:send(SocketB,Message),
+
+ %% At this point the test program starts sending messages (max 10000). Since
+ %% we're not receiving, eventually the send buffer fills up. Then no more
+ %% sending is possible and select() times out. The number of messages sent
+ %% before this happens is returned in Iters. The timeout value for get_term/2
+ %% must be large enough so there's time for the select() to time out and
+ %% the test program to return the error tuple (below).
+ Res0 =
+ if VxSim == false ->
+ ?line {term,{Res,ETO,Iters,ETO}} = runner:get_term(P3, 20000),
+ Res;
+ true -> % relax the test for vxsim
+ ?line case runner:get_term(P3, 20000) of
+ {term,{Res,ETO,Iters,ETO}} ->
+ Res;
+ {term,{Res,_,Iters,ETO}} -> % EIO?
+ Res
+ end
+ end,
+ ?line runner:recv_eot(P3),
+ ?line true = ((Res0 < 0) and (Iters > 0)),
+ ?line gen_tcp:close(SocketB),
+ ?line gen_tcp:close(EpmdSocket),
+ ok.
+
+
+ei_connect_tmo(doc) ->
+ ["Check accept with timeouts."];
+ei_connect_tmo(suite) ->
+ [];
+ei_connect_tmo(Config) when is_list(Config) ->
+ %dbg:tracer(),
+ %dbg:p(self()),
+ VxSim = ?config(vxsim, Config),
+ DummyNode = make_and_check_dummy(),
+ ?line P = runner:start(?connect_tmo),
+ ?line runner:send_term(P,{c_nod_connect_tmo_1,
+ kaksmula_som_ingen_bryr_sig_om,
+ DummyNode}),
+ ETimedout =
+ if VxSim == false ->
+ ?line {term,{-3,ETO,ETO}} = runner:get_term(P, 10000),
+ ?line ETO;
+ true -> % relax the test for vxsim
+ ?line case runner:get_term(P, 10000) of
+ {term,{-3,ETO,ETO}} ->
+ ?line ETO;
+ {term,{-1,_,ETO}} -> % EHOSTUNREACH = ok
+ ?line ETO
+ end
+ end,
+ ?line runner:recv_eot(P),
+ ?line P2 = runner:start(?connect_tmo),
+ ?line runner:send_term(P2,{c_nod_connect_tmo_2,
+ erlang:get_cookie(),
+ node()}),
+ ?line {term, X} = runner:get_term(P2, 10000),
+ ?line runner:recv_eot(P2),
+ ?line true = is_integer(X),
+ %% Aborted handshake test...
+ ?line {_,Host} = split(node()),
+ ?line OurName = join(cccc,Host),
+ ?line Node = join(c_nod_connect_tmo_3,Host),
+ ?line LSocket = case gen_tcp:listen(0, [{active, false}, {packet,2}]) of
+ {ok, Socket} ->
+ ?line Socket;
+ Else ->
+ ?line exit(Else)
+ end,
+ ?line EpmdSocket = register(OurName, LSocket, 1, 5),
+ ?line P3 = runner:start(?connect_tmo),
+ ?line Cookie = kaksmula_som_ingen_bryr_sig_om,
+ ?line runner:send_term(P3,{c_nod_connect_tmo_3,
+ Cookie,
+ OurName}),
+ ?line SocketB = case gen_tcp:accept(LSocket) of
+ {ok, Socket1} ->
+ ?line Socket1;
+ Else2 ->
+ ?line exit(Else2)
+ end,
+ ?line {hidden,Node,5} = recv_name(SocketB), % See 1)
+ ?line send_status(SocketB, ok),
+ ?line MyChallengeB = gen_challenge(),
+ ?line send_challenge(SocketB, OurName, MyChallengeB, 5),
+ ?line HisChallengeB = recv_challenge_reply(
+ SocketB,
+ MyChallengeB,
+ Cookie),
+ ?line {term,{-1,ETimedout,ETimedout}} = runner:get_term(P3, 10000),
+ ?line runner:recv_eot(P3),
+ ?line gen_tcp:close(SocketB),
+ ?line gen_tcp:close(EpmdSocket),
+ ok.
+
+
+ei_accept_tmo(doc) ->
+ ["Check accept with timeouts."];
+ei_accept_tmo(suite) ->
+ [];
+ei_accept_tmo(Config) when is_list(Config) ->
+ %%dbg:tracer(),
+ %%dbg:p(self()),
+ ?line P = runner:start(?accept_tmo),
+ ?line runner:send_term(P,{c_nod_som_ingen_kontaktar_1,
+ kaksmula_som_ingen_bryr_sig_om}),
+ ?line {term,{-1,ETimedout,ETimedout}} = runner:get_term(P, 10000),
+ ?line runner:recv_eot(P),
+ ?line P2 = runner:start(?accept_tmo),
+ ?line runner:send_term(P2,{c_nod_som_vi_kontaktar_1,
+ erlang:get_cookie()}),
+ ?line receive after 1000 -> ok end,
+ ?line CNode1 = make_node(c_nod_som_vi_kontaktar_1),
+ ?line {ignored,CNode1} ! tjenare,
+ ?line {term, X} = runner:get_term(P2, 10000),
+ ?line runner:recv_eot(P2),
+ ?line true = is_integer(X),
+ ?line P3 = runner:start(?accept_tmo),
+ ?line runner:send_term(P3,{c_nod_som_vi_kontaktar_2,
+ erlang:get_cookie()}),
+ ?line receive after 1000 -> ok end,
+ ?line CNode2 = make_node(c_nod_som_vi_kontaktar_2),
+ ?line {NA,NB} = split(CNode2),
+ ?line {_,Host} = split(node()),
+ ?line OurName = join(ccc,Host),
+ ?line {port,PortNo,_} = erl_epmd:port_please(NA,NB),
+ ?line {ok, SocketA} = gen_tcp:connect(atom_to_list(NB),PortNo,
+ [{active,false},
+ {packet,2}]),
+ ?line send_name(SocketA,OurName,5),
+ ?line ok = recv_status(SocketA),
+ ?line {hidden,Node,5,HisChallengeA} = recv_challenge(SocketA), % See 1)
+ ?line OurChallengeA = gen_challenge(),
+ ?line OurDigestA = gen_digest(HisChallengeA, erlang:get_cookie()),
+ %% Dont do the last two steps of the connection setup...
+ %% send_challenge_reply(SocketA, OurChallengeA, OurDigestA),
+ %% ok = recv_challenge_ack(SocketA, OurChallengeA, erlang:get_cookie()),
+ ?line {term, {-1,ETimedout,ETimedout}} = runner:get_term(P3, 10000),
+ ?line runner:recv_eot(P3),
+ ?line gen_tcp:close(SocketA),
+ ok.
+
+make_node(X) ->
+ list_to_atom(atom_to_list(X) ++ "@" ++
+ hd(tl(string:tokens(atom_to_list(node()),"@")))).
+
+
+make_and_check_dummy() ->
+ % First check that the host has an ip and is *not* reachable
+ ?line case gen_tcp:connect(?dummy_host,23,[{active,false}],5000) of
+ {error,timeout} -> ok;
+ {error,ehostunreach} -> ok
+ end,
+
+ list_to_atom("dummy@"++atom_to_list(?dummy_host)).
+
+%%
+%% Stolen from the erl_distribution_wb_test in kernel
+%% To be able to do partial handshakes...
+%%
+
+-define(to_port(Socket, Data),
+ case inet_tcp:send(Socket, Data) of
+ {error, closed} ->
+ self() ! {tcp_closed, Socket},
+ {error, closed};
+ R ->
+ R
+ end).
+
+-define(DFLAG_PUBLISHED,1).
+-define(DFLAG_ATOM_CACHE,2).
+-define(DFLAG_EXTENDED_REFERENCES,4).
+-define(DFLAG_EXTENDED_PIDS_PORTS,16#100).
+-define(DFLAG_DIST_MONITOR,8).
+
+%% From R9 and forward extended references is compulsory
+-define(COMPULSORY_DFLAGS, (?DFLAG_EXTENDED_REFERENCES bor ?DFLAG_EXTENDED_PIDS_PORTS)).
+
+-define(shutdown(X), exit(X)).
+-define(int16(X), [((X) bsr 8) band 16#ff, (X) band 16#ff]).
+
+-define(int32(X),
+ [((X) bsr 24) band 16#ff, ((X) bsr 16) band 16#ff,
+ ((X) bsr 8) band 16#ff, (X) band 16#ff]).
+
+-define(i16(X1,X0),
+ (?u16(X1,X0) -
+ (if (X1) > 127 -> 16#10000; true -> 0 end))).
+
+-define(u16(X1,X0),
+ (((X1) bsl 8) bor (X0))).
+
+-define(u32(X3,X2,X1,X0),
+ (((X3) bsl 24) bor ((X2) bsl 16) bor ((X1) bsl 8) bor (X0))).
+
+%%
+%% Handshake utilities
+%%
+
+%%
+%% MD5 hashing
+%%
+
+%% This is no proper random number, but that is not really important in
+%% this test
+gen_challenge() ->
+ {_,_,N} = erlang:now(),
+ N.
+
+%% Generate a message digest from Challenge number and Cookie
+gen_digest(Challenge, Cookie) when is_integer(Challenge), is_atom(Cookie) ->
+ C0 = erlang:md5_init(),
+ C1 = erlang:md5_update(C0, atom_to_list(Cookie)),
+ C2 = erlang:md5_update(C1, integer_to_list(Challenge)),
+ binary_to_list(erlang:md5_final(C2)).
+
+
+%%
+%% The differrent stages of the MD5 handshake
+%%
+
+send_status(Socket, Stat) ->
+ case gen_tcp:send(Socket, [$s | atom_to_list(Stat)]) of
+ {error, _} ->
+ ?shutdown(could_not_send_status);
+ _ ->
+ true
+ end.
+
+
+recv_status(Socket) ->
+ case gen_tcp:recv(Socket, 0) of
+ {ok, [$s|StrStat]} ->
+ list_to_atom(StrStat);
+ Bad ->
+ exit(Bad)
+ end.
+
+send_challenge(Socket, Node, Challenge, Version) ->
+ send_challenge(Socket, Node, Challenge, Version, ?COMPULSORY_DFLAGS).
+send_challenge(Socket, Node, Challenge, Version, Flags) ->
+ {ok, {{Ip1,Ip2,Ip3,Ip4}, _}} = inet:sockname(Socket),
+ ?to_port(Socket, [$n,?int16(Version),?int32(Flags),
+ ?int32(Challenge), atom_to_list(Node)]).
+
+recv_challenge(Socket) ->
+ case gen_tcp:recv(Socket, 0) of
+ {ok,[$n,V1,V0,Fl1,Fl2,Fl3,Fl4,CA3,CA2,CA1,CA0 | Ns]} ->
+ Flags = ?u32(Fl1,Fl2,Fl3,Fl4),
+ Type = case Flags band ?DFLAG_PUBLISHED of
+ 0 ->
+ hidden;
+ _ ->
+ normal
+ end,
+ Node =list_to_atom(Ns),
+ Version = ?u16(V1,V0),
+ Challenge = ?u32(CA3,CA2,CA1,CA0),
+ {Type,Node,Version,Challenge};
+ _ ->
+ ?shutdown(no_node)
+ end.
+
+send_challenge_reply(Socket, Challenge, Digest) ->
+ ?to_port(Socket, [$r,?int32(Challenge),Digest]).
+
+recv_challenge_reply(Socket, ChallengeA, Cookie) ->
+ case gen_tcp:recv(Socket, 0) of
+ {ok,[$r,CB3,CB2,CB1,CB0 | SumB]} when length(SumB) == 16 ->
+ SumA = gen_digest(ChallengeA, Cookie),
+ ChallengeB = ?u32(CB3,CB2,CB1,CB0),
+ if SumB == SumA ->
+ ChallengeB;
+ true ->
+ ?shutdown(bad_challenge_reply)
+ end;
+ _ ->
+ ?shutdown(no_node)
+ end.
+
+send_challenge_ack(Socket, Digest) ->
+ ?to_port(Socket, [$a,Digest]).
+
+recv_challenge_ack(Socket, ChallengeB, CookieA) ->
+ case gen_tcp:recv(Socket, 0) of
+ {ok,[$a | SumB]} when length(SumB) == 16 ->
+ SumA = gen_digest(ChallengeB, CookieA),
+ if SumB == SumA ->
+ ok;
+ true ->
+ ?shutdown(bad_challenge_ack)
+ end;
+ _ ->
+ ?shutdown(bad_challenge_ack)
+ end.
+
+send_name(Socket, MyNode0, Version) ->
+ send_name(Socket, MyNode0, Version, ?COMPULSORY_DFLAGS).
+send_name(Socket, MyNode0, Version, Flags) ->
+ MyNode = atom_to_list(MyNode0),
+ ?to_port(Socket, [$n,?int16(Version),?int32(Flags)] ++
+ MyNode).
+
+%%
+%% recv_name is common for both old and new handshake.
+%%
+recv_name(Socket) ->
+ case gen_tcp:recv(Socket, 0) of
+ {ok,Data} ->
+ get_name(Data);
+ Res ->
+ ?shutdown({no_node,Res})
+ end.
+
+get_name([$m,VersionA,VersionB,_Ip1,_Ip2,_Ip3,_Ip4|OtherNode]) ->
+ {normal, list_to_atom(OtherNode), ?u16(VersionA,VersionB)};
+get_name([$h,VersionA,VersionB,_Ip1,_Ip2,_Ip3,_Ip4|OtherNode]) ->
+ {hidden, list_to_atom(OtherNode), ?u16(VersionA,VersionB)};
+get_name([$n,VersionA, VersionB, Flag1, Flag2, Flag3, Flag4 | OtherNode]) ->
+ Type = case ?u32(Flag1, Flag2, Flag3, Flag4) band ?DFLAG_PUBLISHED of
+ 0 ->
+ hidden;
+ _ ->
+ normal
+ end,
+ {Type, list_to_atom(OtherNode),
+ ?u16(VersionA,VersionB)};
+get_name(Data) ->
+ ?shutdown(Data).
+
+%%
+%% tell_name is for old handshake
+%%
+tell_name(Socket, MyNode0, Version) ->
+ MyNode = atom_to_list(MyNode0),
+ {ok, {{Ip1,Ip2,Ip3,Ip4}, _}} = inet:sockname(Socket),
+ ?to_port(Socket, [$h,?int16(Version),Ip1,Ip2,Ip3,Ip4] ++
+ MyNode).
+
+%%
+%% The communication with EPMD follows
+%%
+do_register_node(NodeName, TcpPort, VLow, VHigh) ->
+ case gen_tcp:connect({127,0,0,1}, get_epmd_port(), []) of
+ {ok, Socket} ->
+ {N0,_} = split(NodeName),
+ Name = atom_to_list(N0),
+ Extra = "",
+ Elen = length(Extra),
+ Len = 1+2+1+1+2+2+2+length(Name)+2+Elen,
+ gen_tcp:send(Socket, [?int16(Len), $x,
+ ?int16(TcpPort),
+ $M,
+ 0,
+ ?int16(VHigh),
+ ?int16(VLow),
+ ?int16(length(Name)),
+ Name,
+ ?int16(Elen),
+ Extra]),
+ case wait_for_reg_reply(Socket, []) of
+ {error, epmd_close} ->
+ exit(epmd_broken);
+ Other ->
+ Other
+ end;
+ Error ->
+ Error
+ end.
+
+wait_for_reg_reply(Socket, SoFar) ->
+ receive
+ {tcp, Socket, Data0} ->
+ case SoFar ++ Data0 of
+ [$y, Result, A, B] ->
+ case Result of
+ 0 ->
+ {alive, Socket, ?u16(A, B)};
+ _ ->
+ {error, duplicate_name}
+ end;
+ Data when length(Data) < 4 ->
+ wait_for_reg_reply(Socket, Data);
+ Garbage ->
+ {error, {garbage_from_epmd, Garbage}}
+ end;
+ {tcp_closed, Socket} ->
+ {error, epmd_close}
+ after 10000 ->
+ gen_tcp:close(Socket),
+ {error, no_reg_reply_from_epmd}
+ end.
+
+
+register(NodeName, ListenSocket, VLow, VHigh) ->
+ {ok,{_,TcpPort}} = inet:sockname(ListenSocket),
+ case do_register_node(NodeName, TcpPort, VLow, VHigh) of
+ {alive, Socket, Creation} ->
+ Socket;
+ Other ->
+ exit(Other)
+ end.
+
+
+%%
+%% Utilities
+%%
+
+%% Split a nodename
+split([$@|T],A) ->
+ {lists:reverse(A),T};
+split([H|T],A) ->
+ split(T,[H|A]).
+
+split(Atom) ->
+ {A,B} = split(atom_to_list(Atom),[]),
+ {list_to_atom(A),list_to_atom(B)}.
+
+%% Build a simple distribution message
+build_message(Cookie) ->
+ [$?,term_to_binary({6,self(),Cookie,rex}),term_to_binary(plupp)].
+
+%% Build a distribution message that will make rex answer
+build_rex_message(Cookie,OurName) ->
+ [$?,term_to_binary({6,self(),Cookie,rex}),
+ term_to_binary({'$gen_cast',
+ {cast,
+ rpc,
+ cast,
+ [OurName, hello, world, []],
+ self()} })].
+
+%% Receive a distribution message
+recv_message(Socket) ->
+ case gen_tcp:recv(Socket, 0) of
+ {ok,Data} ->
+ B0 = list_to_binary(Data),
+ {_,B1} = erlang:split_binary(B0,1),
+ Header = erlang:binary_to_term(B1),
+ Siz = size(term_to_binary(Header)),
+ {_,B2} = erlang:split_binary(B1,Siz),
+ Message = case (catch erlang:binary_to_term(B2)) of
+ {'EXIT', _} ->
+ could_not_digest_message;
+ Other ->
+ Other
+ end,
+ {Header, Message};
+ Res ->
+ exit({no_message,Res})
+ end.
+
+%% Build a nodename
+join(Name,Host) ->
+ list_to_atom(atom_to_list(Name) ++ "@" ++ atom_to_list(Host)).
+
+%% start/stop slave.
+start_node(Name, Param) ->
+ ?t:start_node(Name, slave, [{args, Param}]).
+
+stop_node(Node) ->
+ ?t:stop_node(Node).
+
+
+get_nodenames(N, T) ->
+ get_nodenames(N, T, []).
+
+get_nodenames(0, _, Acc) ->
+ Acc;
+get_nodenames(N, T, Acc) ->
+ {A, B, C} = now(),
+ get_nodenames(N-1, T, [list_to_atom(atom_to_list(?MODULE)
+ ++ "-"
+ ++ atom_to_list(T)
+ ++ "-"
+ ++ integer_to_list(A)
+ ++ "-"
+ ++ integer_to_list(B)
+ ++ "-"
+ ++ integer_to_list(C)) | Acc]).
+
+get_epmd_port() ->
+ case init:get_argument(epmd_port) of
+ {ok, [[PortStr|_]|_]} when is_list(PortStr) ->
+ list_to_integer(PortStr);
+ error ->
+ 4369 % Default epmd port
+ end.