1/* Copyright Joyent, Inc. and other Node 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/* this test is Unix only */
23#ifndef _WIN32
24
25#include "uv.h"
26#include "task.h"
27
28#include <stdio.h>
29#include <string.h>
30
31static struct sockaddr_in addr;
32static uv_tcp_t tcp_server;
33static uv_tcp_t tcp_outgoing[2];
34static uv_tcp_t tcp_incoming[ARRAY_SIZE(tcp_outgoing)];
35static uv_connect_t connect_reqs[ARRAY_SIZE(tcp_outgoing)];
36static uv_tcp_t tcp_check;
37static uv_connect_t tcp_check_req;
38static uv_write_t write_reqs[ARRAY_SIZE(tcp_outgoing)];
39static unsigned int got_connections;
40static unsigned int close_cb_called;
41static unsigned int write_cb_called;
42static unsigned int read_cb_called;
43static unsigned int pending_incoming;
44
45static void close_cb(uv_handle_t* handle) {
46  close_cb_called++;
47}
48
49static void write_cb(uv_write_t* req, int status) {
50  ASSERT_OK(status);
51  write_cb_called++;
52}
53
54static void connect_cb(uv_connect_t* req, int status) {
55  unsigned int i;
56  uv_buf_t buf;
57  uv_stream_t* outgoing;
58
59  if (req == &tcp_check_req) {
60    ASSERT(status);
61
62    /*
63     * Time to finish the test: close both the check and pending incoming
64     * connections
65     */
66    uv_close((uv_handle_t*) &tcp_incoming[pending_incoming], close_cb);
67    uv_close((uv_handle_t*) &tcp_check, close_cb);
68    return;
69  }
70
71  ASSERT_OK(status);
72  ASSERT_LE(connect_reqs, req);
73  ASSERT_LE(req, connect_reqs + ARRAY_SIZE(connect_reqs));
74  i = req - connect_reqs;
75
76  buf = uv_buf_init("x", 1);
77  outgoing = (uv_stream_t*) &tcp_outgoing[i];
78  ASSERT_OK(uv_write(&write_reqs[i], outgoing, &buf, 1, write_cb));
79}
80
81static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {
82  static char slab[1];
83  buf->base = slab;
84  buf->len = sizeof(slab);
85}
86
87static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
88  uv_loop_t* loop;
89  unsigned int i;
90
91  pending_incoming = (uv_tcp_t*) stream - &tcp_incoming[0];
92  ASSERT_LT(pending_incoming, got_connections);
93  ASSERT_OK(uv_read_stop(stream));
94  ASSERT_EQ(1, nread);
95
96  loop = stream->loop;
97  read_cb_called++;
98
99  /* Close all active incomings, except current one */
100  for (i = 0; i < got_connections; i++) {
101    if (i != pending_incoming)
102      uv_close((uv_handle_t*) &tcp_incoming[i], close_cb);
103  }
104
105  /* Close server, so no one will connect to it */
106  uv_close((uv_handle_t*) &tcp_server, close_cb);
107
108  /* Create new fd that should be one of the closed incomings */
109  ASSERT_OK(uv_tcp_init(loop, &tcp_check));
110  ASSERT_OK(uv_tcp_connect(&tcp_check_req,
111                           &tcp_check,
112                           (const struct sockaddr*) &addr,
113                           connect_cb));
114  ASSERT_OK(uv_read_start((uv_stream_t*) &tcp_check, alloc_cb, read_cb));
115}
116
117static void connection_cb(uv_stream_t* server, int status) {
118  unsigned int i;
119  uv_tcp_t* incoming;
120
121  ASSERT_PTR_EQ(server, (uv_stream_t*) &tcp_server);
122
123  /* Ignore tcp_check connection */
124  if (got_connections == ARRAY_SIZE(tcp_incoming))
125    return;
126
127  /* Accept everyone */
128  incoming = &tcp_incoming[got_connections++];
129  ASSERT_OK(uv_tcp_init(server->loop, incoming));
130  ASSERT_OK(uv_accept(server, (uv_stream_t*) incoming));
131
132  if (got_connections != ARRAY_SIZE(tcp_incoming))
133    return;
134
135  /* Once all clients are accepted - start reading */
136  for (i = 0; i < ARRAY_SIZE(tcp_incoming); i++) {
137    incoming = &tcp_incoming[i];
138    ASSERT_OK(uv_read_start((uv_stream_t*) incoming, alloc_cb, read_cb));
139  }
140}
141
142TEST_IMPL(tcp_close_accept) {
143  unsigned int i;
144  uv_loop_t* loop;
145  uv_tcp_t* client;
146
147  /*
148   * A little explanation of what goes on below:
149   *
150   * We'll create server and connect to it using two clients, each writing one
151   * byte once connected.
152   *
153   * When all clients will be accepted by server - we'll start reading from them
154   * and, on first client's first byte, will close second client and server.
155   * After that, we'll immediately initiate new connection to server using
156   * tcp_check handle (thus, reusing fd from second client).
157   *
158   * In this situation uv__io_poll()'s event list should still contain read
159   * event for second client, and, if not cleaned up properly, `tcp_check` will
160   * receive stale event of second incoming and invoke `connect_cb` with zero
161   * status.
162   */
163
164  loop = uv_default_loop();
165  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
166
167  ASSERT_OK(uv_tcp_init(loop, &tcp_server));
168  ASSERT_OK(uv_tcp_bind(&tcp_server, (const struct sockaddr*) &addr, 0));
169  ASSERT_OK(uv_listen((uv_stream_t*) &tcp_server,
170                      ARRAY_SIZE(tcp_outgoing),
171                      connection_cb));
172
173  for (i = 0; i < ARRAY_SIZE(tcp_outgoing); i++) {
174    client = tcp_outgoing + i;
175
176    ASSERT_OK(uv_tcp_init(loop, client));
177    ASSERT_OK(uv_tcp_connect(&connect_reqs[i],
178                             client,
179                             (const struct sockaddr*) &addr,
180                             connect_cb));
181  }
182
183  uv_run(loop, UV_RUN_DEFAULT);
184
185  ASSERT_EQ(ARRAY_SIZE(tcp_outgoing), got_connections);
186  ASSERT_EQ((ARRAY_SIZE(tcp_outgoing) + 2), close_cb_called);
187  ASSERT_EQ(ARRAY_SIZE(tcp_outgoing), write_cb_called);
188  ASSERT_EQ(1, read_cb_called);
189
190  MAKE_VALGRIND_HAPPY(loop);
191  return 0;
192}
193
194#else
195
196typedef int file_has_no_tests; /* ISO C forbids an empty translation unit. */
197
198#endif /* !_WIN32 */
199