%% %% %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.