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