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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1998-2009. 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(gen_tcp_api_SUITE).
%% Tests the documented API for the gen_tcp functions. The "normal" cases
%% are not tested here, because they are tested indirectly in this and
%% and other test suites.
-include("test_server.hrl").
-include_lib("kernel/include/inet.hrl").
-export([all/1, init_per_testcase/2, fin_per_testcase/2,
t_accept/1, t_connect_timeout/1, t_accept_timeout/1,
t_connect/1, t_connect_bad/1,
t_recv/1, t_recv_timeout/1, t_recv_eof/1,
t_shutdown_write/1, t_shutdown_both/1, t_shutdown_error/1,
t_fdopen/1]).
all(suite) -> [t_accept, t_connect, t_recv, t_shutdown_write,
t_shutdown_both, t_shutdown_error, t_fdopen].
init_per_testcase(_Func, Config) ->
Dog = test_server:timetrap(test_server:seconds(60)),
[{watchdog, Dog}|Config].
fin_per_testcase(_Func, Config) ->
Dog = ?config(watchdog, Config),
test_server:timetrap_cancel(Dog).
%%% gen_tcp:accept/1,2
t_accept(suite) -> [t_accept_timeout].
t_accept_timeout(doc) -> "Test that gen_tcp:accept/2 (with timeout) works.";
t_accept_timeout(suite) -> [];
t_accept_timeout(Config) when is_list(Config) ->
?line {ok, L} = gen_tcp:listen(0, []),
?line timeout({gen_tcp, accept, [L, 200]}, 0.2, 1.0).
%%% gen_tcp:connect/X
t_connect(suite) -> [t_connect_timeout, t_connect_bad].
t_connect_timeout(doc) -> "Test that gen_tcp:connect/4 (with timeout) works.";
t_connect_timeout(Config) when is_list(Config) ->
%%?line BadAddr = {134,138,177,16},
%%?line TcpPort = 80,
?line {ok, BadAddr} = unused_ip(),
?line TcpPort = 45638,
?line ok = io:format("Connecting to ~p, port ~p", [BadAddr, TcpPort]),
?line connect_timeout({gen_tcp,connect,[BadAddr,TcpPort,[],200]}, 0.2, 5.0).
t_connect_bad(doc) ->
["Test that gen_tcp:connect/3 handles non-existings hosts, and other ",
"invalid things."];
t_connect_bad(suite) -> [];
t_connect_bad(Config) when is_list(Config) ->
?line NonExistingPort = 45638, % Not in use, I hope.
?line {error, Reason1} = gen_tcp:connect(localhost, NonExistingPort, []),
?line io:format("Error for connection attempt to port not in use: ~p",
[Reason1]),
?line {error, Reason2} = gen_tcp:connect("non-existing-host-xxx", 7, []),
?line io:format("Error for connection attempt to non-existing host: ~p",
[Reason2]),
ok.
%%% gen_tcp:recv/X
t_recv(suite) -> [t_recv_timeout, t_recv_eof].
t_recv_timeout(doc) -> "Test that gen_tcp:recv/3 (with timeout works).";
t_recv_timeout(suite) -> [];
t_recv_timeout(Config) when is_list(Config) ->
?line {ok, L} = gen_tcp:listen(0, []),
?line {ok, Port} = inet:port(L),
?line {ok, Client} = gen_tcp:connect(localhost, Port, [{active, false}]),
?line {ok, _A} = gen_tcp:accept(L),
?line timeout({gen_tcp, recv, [Client, 0, 200]}, 0.2, 5.0).
t_recv_eof(doc) -> "Test that end of file on a socket is reported correctly.";
t_recv_eof(suite) -> [];
t_recv_eof(Config) when is_list(Config) ->
?line {ok, L} = gen_tcp:listen(0, []),
?line {ok, Port} = inet:port(L),
?line {ok, Client} = gen_tcp:connect(localhost, Port, [{active, false}]),
?line {ok, A} = gen_tcp:accept(L),
?line ok = gen_tcp:close(A),
?line {error, closed} = gen_tcp:recv(Client, 0),
ok.
%%% gen_tcp:shutdown/2
t_shutdown_write(Config) when is_list(Config) ->
?line {ok, L} = gen_tcp:listen(0, []),
?line {ok, Port} = inet:port(L),
?line {ok, Client} = gen_tcp:connect(localhost, Port, [{active, false}]),
?line {ok, A} = gen_tcp:accept(L),
?line ok = gen_tcp:shutdown(A, write),
?line {error, closed} = gen_tcp:recv(Client, 0),
ok.
t_shutdown_both(Config) when is_list(Config) ->
?line {ok, L} = gen_tcp:listen(0, []),
?line {ok, Port} = inet:port(L),
?line {ok, Client} = gen_tcp:connect(localhost, Port, [{active, false}]),
?line {ok, A} = gen_tcp:accept(L),
?line ok = gen_tcp:shutdown(A, read_write),
?line {error, closed} = gen_tcp:recv(Client, 0),
ok.
t_shutdown_error(Config) when is_list(Config) ->
?line {ok, L} = gen_tcp:listen(0, []),
?line {error, enotconn} = gen_tcp:shutdown(L, read_write),
?line ok = gen_tcp:close(L),
?line {error, closed} = gen_tcp:shutdown(L, read_write),
ok.
%%% gen_tcp:fdopen/2
t_fdopen(Config) when is_list(Config) ->
?line Question = "Aaaa... Long time ago in a small town in Germany,",
?line Answer = "there was a shoemaker, Schumacher was his name.",
?line {ok, L} = gen_tcp:listen(0, [{active, false}]),
?line {ok, Port} = inet:port(L),
?line {ok, Client} = gen_tcp:connect(localhost, Port, [{active, false}]),
?line {ok, A} = gen_tcp:accept(L),
?line {ok, FD} = prim_inet:getfd(A),
?line {ok, Server} = gen_tcp:fdopen(FD, []),
?line ok = gen_tcp:send(Client, Question),
?line {ok, Question} = gen_tcp:recv(Server, length(Question), 2000),
?line ok = gen_tcp:send(Server, Answer),
?line {ok, Answer} = gen_tcp:recv(Client, length(Answer), 2000),
?line ok = gen_tcp:close(Client),
?line {error,closed} = gen_tcp:recv(A, 1, 2000),
?line ok = gen_tcp:close(Server),
?line ok = gen_tcp:close(A),
?line ok = gen_tcp:close(L),
ok.
%%% Utilities
%% Calls M:F/length(A), which should return a timeout error, and complete
%% within the given time.
timeout({M,F,A}, Lower, Upper) ->
case test_server:timecall(M, F, A) of
{Time, Result} when Time < Lower ->
test_server:fail({too_short_time, Time, Result});
{Time, Result} when Time > Upper ->
test_server:fail({too_long_time, Time, Result});
{_, {error, timeout}} ->
ok;
{_, Result} ->
test_server:fail({unexpected_result, Result})
end.
connect_timeout({M,F,A}, Lower, Upper) ->
case test_server:timecall(M, F, A) of
{Time, Result} when Time < Lower ->
case Result of
{error,econnrefused=E} ->
{comment,"Not tested -- got error "++atom_to_list(E)};
{error,enetunreach=E} ->
{comment,"Not tested -- got error "++atom_to_list(E)};
{ok,Socket} -> % What the...
Pinfo = erlang:port_info(Socket),
Db = inet_db:lookup_socket(Socket),
Peer = inet:peername(Socket),
test_server:fail({too_short_time, Time,
[Result,Pinfo,Db,Peer]});
_ ->
test_server:fail({too_short_time, Time, Result})
end;
{Time, Result} when Time > Upper ->
test_server:fail({too_long_time, Time, Result});
{_, {error, timeout}} ->
ok;
{_, Result} ->
test_server:fail({unexpected_result, Result})
end.
%% Try to obtain an unused IP address in the local network.
unused_ip() ->
?line {ok, Host} = inet:gethostname(),
?line {ok, Hent} = inet:gethostbyname(Host),
?line #hostent{h_addr_list=[{A, B, C, _D}|_]} = Hent,
%% Note: In our net, addresses below 16 are reserved for routers and
%% other strange creatures.
?line IP = unused_ip(A, B, C, 16),
io:format("we = ~p, unused_ip = ~p~n", [Hent, IP]),
IP.
unused_ip(_, _, _, 255) -> error;
unused_ip(A, B, C, D) ->
case inet:gethostbyaddr({A, B, C, D}) of
{ok, _} -> unused_ip(A, B, C, D+1);
{error, _} -> {ok, {A, B, C, D}}
end.
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