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
31 static struct sockaddr_in addr;
32 static uv_tcp_t tcp_server;
33 static uv_tcp_t tcp_outgoing[2];
34 static uv_tcp_t tcp_incoming[ARRAY_SIZE(tcp_outgoing)];
35 static uv_connect_t connect_reqs[ARRAY_SIZE(tcp_outgoing)];
36 static uv_tcp_t tcp_check;
37 static uv_connect_t tcp_check_req;
38 static uv_write_t write_reqs[ARRAY_SIZE(tcp_outgoing)];
39 static unsigned int got_connections;
40 static unsigned int close_cb_called;
41 static unsigned int write_cb_called;
42 static unsigned int read_cb_called;
43 static unsigned int pending_incoming;
44
close_cb(uv_handle_t * handle)45 static void close_cb(uv_handle_t* handle) {
46 close_cb_called++;
47 }
48
write_cb(uv_write_t * req,int status)49 static void write_cb(uv_write_t* req, int status) {
50 ASSERT_OK(status);
51 write_cb_called++;
52 }
53
connect_cb(uv_connect_t * req,int status)54 static 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
alloc_cb(uv_handle_t * handle,size_t size,uv_buf_t * buf)81 static 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
read_cb(uv_stream_t * stream,ssize_t nread,const uv_buf_t * buf)87 static 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
connection_cb(uv_stream_t * server,int status)117 static 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
TEST_IMPL(tcp_close_accept)142 TEST_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
196 typedef int file_has_no_tests; /* ISO C forbids an empty translation unit. */
197
198 #endif /* !_WIN32 */
199
