1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1998-2011. 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_lib("test_server/include/test_server.hrl").
-include_lib("kernel/include/inet.hrl").
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2,
init_per_testcase/2, end_per_testcase/2,
t_connect_timeout/1, t_accept_timeout/1,
t_connect_bad/1,
t_recv_timeout/1, t_recv_eof/1,
t_shutdown_write/1, t_shutdown_both/1, t_shutdown_error/1,
t_fdopen/1, t_implicit_inet6/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[{group, t_accept}, {group, t_connect}, {group, t_recv},
t_shutdown_write, t_shutdown_both, t_shutdown_error,
t_fdopen, t_implicit_inet6].
groups() ->
[{t_accept, [], [t_accept_timeout]},
{t_connect, [], [t_connect_timeout, t_connect_bad]},
{t_recv, [], [t_recv_timeout, t_recv_eof]}].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
init_per_testcase(_Func, Config) ->
Dog = test_server:timetrap(test_server:seconds(60)),
[{watchdog, Dog}|Config].
end_per_testcase(_Func, Config) ->
Dog = ?config(watchdog, Config),
test_server:timetrap_cancel(Dog).
%%% gen_tcp:accept/1,2
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_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_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.
%%% implicit inet6 option to api functions
t_implicit_inet6(Config) when is_list(Config) ->
?line Host = ok(inet:gethostname()),
?line
case inet:getaddr(Host, inet6) of
{ok,Addr} ->
?line t_implicit_inet6(Host, Addr);
{error,Reason} ->
{skip,
"Can not look up IPv6 address: "
++atom_to_list(Reason)}
end.
t_implicit_inet6(Host, Addr) ->
?line
case gen_tcp:listen(0, [inet6]) of
{ok,S1} ->
?line Loopback = {0,0,0,0,0,0,0,1},
?line io:format("~s ~p~n", ["::1",Loopback]),
?line implicit_inet6(S1, Loopback),
?line ok = gen_tcp:close(S1),
%%
?line Localhost = "localhost",
?line Localaddr = ok(inet:getaddr(Localhost, inet6)),
?line io:format("~s ~p~n", [Localhost,Localaddr]),
?line S2 = ok(gen_tcp:listen(0, [{ip,Localaddr}])),
?line implicit_inet6(S2, Localaddr),
?line ok = gen_tcp:close(S2),
%%
?line io:format("~s ~p~n", [Host,Addr]),
?line S3 = ok(gen_tcp:listen(0, [{ifaddr,Addr}])),
?line implicit_inet6(S3, Addr),
?line ok = gen_tcp:close(S3);
{error,_} ->
{skip,"IPv6 not supported"}
end.
implicit_inet6(S, Addr) ->
?line P = ok(inet:port(S)),
?line S2 = ok(gen_tcp:connect(Addr, P, [])),
?line P2 = ok(inet:port(S2)),
?line S1 = ok(gen_tcp:accept(S)),
?line P1 = P = ok(inet:port(S1)),
?line {Addr,P2} = ok(inet:peername(S1)),
?line {Addr,P1} = ok(inet:peername(S2)),
?line {Addr,P1} = ok(inet:sockname(S1)),
?line {Addr,P2} = ok(inet:sockname(S2)),
?line ok = gen_tcp:close(S2),
?line ok = gen_tcp:close(S1).
%%% 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.
ok({ok,V}) -> V.
|
