1/* Copyright libuv project contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22#include "uv.h"
23#include "task.h"
24
25#include <errno.h>
26#include <string.h> /* memset */
27
28#ifdef _WIN32
29# define INVALID_FD (INVALID_HANDLE_VALUE)
30#else
31# define INVALID_FD (-1)
32#endif
33
34static uv_loop_t* loop;
35static uv_tcp_t tcp_server;
36static uv_tcp_t tcp_client;
37static uv_tcp_t tcp_accepted;
38static uv_connect_t connect_req;
39static uv_shutdown_t shutdown_req;
40static uv_write_t write_reqs[4];
41
42static int client_close;
43static int shutdown_before_close;
44
45static int write_cb_called;
46static int close_cb_called;
47static int shutdown_cb_called;
48
49static void connect_cb(uv_connect_t* req, int status);
50static void write_cb(uv_write_t* req, int status);
51static void close_cb(uv_handle_t* handle);
52static void shutdown_cb(uv_shutdown_t* req, int status);
53
54static int read_size;
55
56
57static void do_write(uv_tcp_t* handle) {
58  uv_buf_t buf;
59  unsigned i;
60  int r;
61
62  buf = uv_buf_init("PING", 4);
63  for (i = 0; i < ARRAY_SIZE(write_reqs); i++) {
64    r = uv_write(&write_reqs[i], (uv_stream_t*) handle, &buf, 1, write_cb);
65    ASSERT_OK(r);
66  }
67}
68
69
70static void do_close(uv_tcp_t* handle) {
71  uv_os_fd_t fd;
72  int r;
73
74  if (shutdown_before_close == 1) {
75    ASSERT_OK(uv_shutdown(&shutdown_req,
76                          (uv_stream_t*) handle,
77                          shutdown_cb));
78    ASSERT_EQ(UV_EINVAL, uv_tcp_close_reset(handle, close_cb));
79  } else if (shutdown_before_close == 2) {
80    r = uv_fileno((const uv_handle_t*) handle, &fd);
81    ASSERT_OK(r);
82#ifdef _WIN32
83    ASSERT_PTR_NE(fd, INVALID_FD);
84    ASSERT_OK(shutdown((SOCKET)fd, SD_BOTH));
85#else
86    ASSERT_NE(fd, INVALID_FD);
87    ASSERT_OK(shutdown(fd, SHUT_RDWR));
88#endif
89    ASSERT_OK(uv_tcp_close_reset(handle, close_cb));
90  } else {
91    ASSERT_OK(uv_tcp_close_reset(handle, close_cb));
92    ASSERT_EQ(UV_ENOTCONN, uv_shutdown(&shutdown_req, (uv_stream_t*) handle,
93              shutdown_cb));
94  }
95
96  uv_close((uv_handle_t*) &tcp_server, NULL);
97}
98
99static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {
100  static char slab[1024];
101  buf->base = slab;
102  buf->len = sizeof(slab);
103}
104
105static void read_cb2(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
106  ASSERT_PTR_EQ((uv_tcp_t*)stream, &tcp_client);
107  if (nread == UV_EOF)
108    uv_close((uv_handle_t*) stream, NULL);
109}
110
111
112static void connect_cb(uv_connect_t* conn_req, int status) {
113  ASSERT_PTR_EQ(conn_req, &connect_req);
114  uv_read_start((uv_stream_t*) &tcp_client, alloc_cb, read_cb2);
115  do_write(&tcp_client);
116  if (client_close)
117    do_close(&tcp_client);
118}
119
120
121static void write_cb(uv_write_t* req, int status) {
122  /* write callbacks should run before the close callback */
123  ASSERT_OK(close_cb_called);
124  ASSERT_PTR_EQ(req->handle, (uv_stream_t*)&tcp_client);
125  write_cb_called++;
126}
127
128
129static void close_cb(uv_handle_t* handle) {
130  if (client_close)
131    ASSERT_PTR_EQ(handle, (uv_handle_t*) &tcp_client);
132  else
133    ASSERT_PTR_EQ(handle, (uv_handle_t*) &tcp_accepted);
134
135  close_cb_called++;
136}
137
138static void shutdown_cb(uv_shutdown_t* req, int status) {
139  if (client_close)
140    ASSERT_PTR_EQ(req->handle, (uv_stream_t*) &tcp_client);
141  else
142    ASSERT_PTR_EQ(req->handle, (uv_stream_t*) &tcp_accepted);
143
144  shutdown_cb_called++;
145}
146
147
148static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
149  ASSERT_PTR_EQ((uv_tcp_t*)stream, &tcp_accepted);
150  if (nread < 0) {
151    uv_close((uv_handle_t*) stream, NULL);
152  } else {
153    read_size += nread;
154    if (read_size == 16 && client_close == 0)
155      do_close(&tcp_accepted);
156  }
157}
158
159
160static void connection_cb(uv_stream_t* server, int status) {
161  ASSERT_OK(status);
162
163  ASSERT_OK(uv_tcp_init(loop, &tcp_accepted));
164  ASSERT_OK(uv_accept(server, (uv_stream_t*) &tcp_accepted));
165
166  uv_read_start((uv_stream_t*) &tcp_accepted, alloc_cb, read_cb);
167}
168
169
170static void start_server(uv_loop_t* loop, uv_tcp_t* handle) {
171  struct sockaddr_in addr;
172  int r;
173
174  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
175
176  r = uv_tcp_init(loop, handle);
177  ASSERT_OK(r);
178
179  r = uv_tcp_bind(handle, (const struct sockaddr*) &addr, 0);
180  ASSERT_OK(r);
181
182  r = uv_listen((uv_stream_t*)handle, 128, connection_cb);
183  ASSERT_OK(r);
184}
185
186
187static void do_connect(uv_loop_t* loop, uv_tcp_t* tcp_client) {
188  struct sockaddr_in addr;
189  int r;
190
191  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
192
193  r = uv_tcp_init(loop, tcp_client);
194  ASSERT_OK(r);
195
196  r = uv_tcp_connect(&connect_req,
197                     tcp_client,
198                     (const struct sockaddr*) &addr,
199                     connect_cb);
200  ASSERT_OK(r);
201}
202
203
204/* Check that pending write requests have their callbacks
205 * invoked when the handle is closed.
206 */
207TEST_IMPL(tcp_close_reset_client) {
208  int r;
209
210  loop = uv_default_loop();
211
212  start_server(loop, &tcp_server);
213
214  client_close = 1;
215  shutdown_before_close = 0;
216
217  do_connect(loop, &tcp_client);
218
219  ASSERT_OK(write_cb_called);
220  ASSERT_OK(close_cb_called);
221  ASSERT_OK(shutdown_cb_called);
222
223  r = uv_run(loop, UV_RUN_DEFAULT);
224  ASSERT_OK(r);
225
226  ASSERT_EQ(4, write_cb_called);
227  ASSERT_EQ(1, close_cb_called);
228  ASSERT_OK(shutdown_cb_called);
229
230  MAKE_VALGRIND_HAPPY(loop);
231  return 0;
232}
233
234TEST_IMPL(tcp_close_reset_client_after_shutdown) {
235  int r;
236
237  loop = uv_default_loop();
238
239  start_server(loop, &tcp_server);
240
241  client_close = 1;
242  shutdown_before_close = 1;
243
244  do_connect(loop, &tcp_client);
245
246  ASSERT_OK(write_cb_called);
247  ASSERT_OK(close_cb_called);
248  ASSERT_OK(shutdown_cb_called);
249
250  r = uv_run(loop, UV_RUN_DEFAULT);
251  ASSERT_OK(r);
252
253  ASSERT_EQ(4, write_cb_called);
254  ASSERT_OK(close_cb_called);
255  ASSERT_EQ(1, shutdown_cb_called);
256
257  MAKE_VALGRIND_HAPPY(loop);
258  return 0;
259}
260
261TEST_IMPL(tcp_close_reset_accepted) {
262  int r;
263
264  loop = uv_default_loop();
265
266  start_server(loop, &tcp_server);
267
268  client_close = 0;
269  shutdown_before_close = 0;
270
271  do_connect(loop, &tcp_client);
272
273  ASSERT_OK(write_cb_called);
274  ASSERT_OK(close_cb_called);
275  ASSERT_OK(shutdown_cb_called);
276
277  r = uv_run(loop, UV_RUN_DEFAULT);
278  ASSERT_OK(r);
279
280  ASSERT_EQ(4, write_cb_called);
281  ASSERT_EQ(1, close_cb_called);
282  ASSERT_OK(shutdown_cb_called);
283
284  MAKE_VALGRIND_HAPPY(loop);
285  return 0;
286}
287
288TEST_IMPL(tcp_close_reset_accepted_after_shutdown) {
289  int r;
290
291  loop = uv_default_loop();
292
293  start_server(loop, &tcp_server);
294
295  client_close = 0;
296  shutdown_before_close = 1;
297
298  do_connect(loop, &tcp_client);
299
300  ASSERT_OK(write_cb_called);
301  ASSERT_OK(close_cb_called);
302  ASSERT_OK(shutdown_cb_called);
303
304  r = uv_run(loop, UV_RUN_DEFAULT);
305  ASSERT_OK(r);
306
307  ASSERT_EQ(4, write_cb_called);
308  ASSERT_OK(close_cb_called);
309  ASSERT_EQ(1, shutdown_cb_called);
310
311  MAKE_VALGRIND_HAPPY(loop);
312  return 0;
313}
314
315TEST_IMPL(tcp_close_reset_accepted_after_socket_shutdown) {
316  int r;
317
318  loop = uv_default_loop();
319
320  start_server(loop, &tcp_server);
321
322  client_close = 0;
323  shutdown_before_close = 2;
324
325  do_connect(loop, &tcp_client);
326
327  ASSERT_OK(write_cb_called);
328  ASSERT_OK(close_cb_called);
329  ASSERT_OK(shutdown_cb_called);
330
331  r = uv_run(loop, UV_RUN_DEFAULT);
332  ASSERT_OK(r);
333
334  ASSERT_EQ(4, write_cb_called);
335  ASSERT_EQ(1, close_cb_called);
336  ASSERT_OK(shutdown_cb_called);
337
338  MAKE_VALGRIND_HAPPY(loop);
339  return 0;
340}
341