1 /* Copyright libuv project and 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 #include <stdio.h>
25 #include <stdlib.h>
26 
27 static uv_tcp_t tcp;
28 static uv_connect_t connect_req;
29 static uv_shutdown_t shutdown_req;
30 static uv_buf_t qbuf;
31 static int got_q;
32 static int got_eof;
33 static int called_connect_cb;
34 static int called_shutdown_cb;
35 static int called_tcp_close_cb;
36 
37 
alloc_cb(uv_handle_t * handle,size_t size,uv_buf_t * buf)38 static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {
39   buf->base = malloc(size);
40   buf->len = size;
41 }
42 
43 
shutdown_cb(uv_shutdown_t * req,int status)44 static void shutdown_cb(uv_shutdown_t *req, int status) {
45   ASSERT_PTR_EQ(req, &shutdown_req);
46 
47   ASSERT_EQ(1, called_connect_cb);
48   ASSERT_OK(called_tcp_close_cb);
49 }
50 
51 
read_cb(uv_stream_t * t,ssize_t nread,const uv_buf_t * buf)52 static void read_cb(uv_stream_t* t, ssize_t nread, const uv_buf_t* buf) {
53   ASSERT_PTR_EQ((uv_tcp_t*)t, &tcp);
54 
55   if (nread == 0) {
56     free(buf->base);
57     return;
58   }
59 
60   if (!got_q) {
61     ASSERT_EQ(4, nread);
62     ASSERT_OK(got_eof);
63     ASSERT_MEM_EQ(buf->base, "QQSS", 4);
64     free(buf->base);
65     got_q = 1;
66     puts("got QQSS");
67     /* Shutdown our end of the connection simultaneously */
68     uv_shutdown(&shutdown_req, (uv_stream_t*) &tcp, shutdown_cb);
69     called_shutdown_cb++;
70   } else {
71     ASSERT_EQ(nread, UV_EOF);
72     if (buf->base) {
73       free(buf->base);
74     }
75     got_eof = 1;
76     puts("got EOF");
77   }
78 }
79 
80 
connect_cb(uv_connect_t * req,int status)81 static void connect_cb(uv_connect_t *req, int status) {
82   ASSERT_OK(status);
83   ASSERT_PTR_EQ(req, &connect_req);
84 
85   /* Start reading from our connection so we can receive the EOF.  */
86   ASSERT_OK(uv_read_start((uv_stream_t*)&tcp, alloc_cb, read_cb));
87 
88   /* Check error handling. */
89   ASSERT_EQ(UV_EALREADY, uv_read_start((uv_stream_t*)&tcp, alloc_cb, read_cb));
90   ASSERT_EQ(UV_EINVAL, uv_read_start(NULL, alloc_cb, read_cb));
91   ASSERT_EQ(UV_EINVAL, uv_read_start((uv_stream_t*)&tcp, NULL, read_cb));
92   ASSERT_EQ(UV_EINVAL, uv_read_start((uv_stream_t*)&tcp, alloc_cb, NULL));
93 
94   /*
95    * Write the letter 'Q' and 'QSS` to gracefully kill the echo-server. This
96    * will not effect our connection.
97    */
98   ASSERT_EQ(qbuf.len, uv_try_write((uv_stream_t*) &tcp, &qbuf, 1));
99 
100   called_connect_cb++;
101   ASSERT_OK(called_shutdown_cb);
102 }
103 
104 
105 /*
106  * This test has a client which connects to the echo_server and immediately
107  * issues a shutdown. We check that this does not cause libuv to hang.
108  */
TEST_IMPL(shutdown_simultaneous)109 TEST_IMPL(shutdown_simultaneous) {
110   struct sockaddr_in server_addr;
111   int r;
112 
113   qbuf.base = "QQSS";
114   qbuf.len = 4;
115 
116   ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &server_addr));
117   r = uv_tcp_init(uv_default_loop(), &tcp);
118   ASSERT_OK(r);
119 
120   r = uv_tcp_connect(&connect_req,
121                      &tcp,
122                      (const struct sockaddr*) &server_addr,
123                      connect_cb);
124   ASSERT_OK(r);
125 
126   uv_run(uv_default_loop(), UV_RUN_DEFAULT);
127 
128   ASSERT_EQ(1, called_connect_cb);
129   ASSERT_EQ(1, called_shutdown_cb);
130   ASSERT_EQ(1, got_eof);
131   ASSERT_EQ(1, got_q);
132 
133   MAKE_VALGRIND_HAPPY(uv_default_loop());
134   return 0;
135 }
136