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 <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25
26#include "task.h"
27#include "uv.h"
28
29static uv_tcp_t server;
30static uv_tcp_t client;
31static uv_tcp_t incoming;
32static int connect_cb_called;
33static int close_cb_called;
34static int connection_cb_called;
35static int write_cb_called;
36static uv_write_t small_write;
37static uv_write_t big_write;
38
39/* 10 MB, which is large than the send buffer size and the recv buffer */
40static char data[1024 * 1024 * 10];
41
42static void close_cb(uv_handle_t* handle) {
43  close_cb_called++;
44}
45
46static void write_cb(uv_write_t* w, int status) {
47  /* the small write should finish immediately after the big write */
48  ASSERT_OK(uv_stream_get_write_queue_size((uv_stream_t*) &client));
49
50  write_cb_called++;
51
52  if (write_cb_called == 2) {
53    /* we are done */
54    uv_close((uv_handle_t*) &client, close_cb);
55    uv_close((uv_handle_t*) &incoming, close_cb);
56    uv_close((uv_handle_t*) &server, close_cb);
57  }
58}
59
60static void connect_cb(uv_connect_t* _, int status) {
61  int r;
62  uv_buf_t buf;
63  size_t write_queue_size0, write_queue_size1;
64
65  ASSERT_OK(status);
66  connect_cb_called++;
67
68  /* fire a big write */
69  buf = uv_buf_init(data, sizeof(data));
70  r = uv_write(&small_write, (uv_stream_t*) &client, &buf, 1, write_cb);
71  ASSERT_OK(r);
72
73  /* check that the write process gets stuck */
74  write_queue_size0 = uv_stream_get_write_queue_size((uv_stream_t*) &client);
75  ASSERT_GT(write_queue_size0, 0);
76
77  /* fire a small write, which should be queued */
78  buf = uv_buf_init("A", 1);
79  r = uv_write(&big_write, (uv_stream_t*) &client, &buf, 1, write_cb);
80  ASSERT_OK(r);
81
82  write_queue_size1 = uv_stream_get_write_queue_size((uv_stream_t*) &client);
83  ASSERT_EQ(write_queue_size1, write_queue_size0 + 1);
84}
85
86static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {
87  static char base[1024];
88
89  buf->base = base;
90  buf->len = sizeof(base);
91}
92
93static void read_cb(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {}
94
95static void connection_cb(uv_stream_t* tcp, int status) {
96  ASSERT_OK(status);
97  connection_cb_called++;
98
99  ASSERT_OK(uv_tcp_init(tcp->loop, &incoming));
100  ASSERT_OK(uv_accept(tcp, (uv_stream_t*) &incoming));
101  ASSERT_OK(uv_read_start((uv_stream_t*) &incoming, alloc_cb, read_cb));
102}
103
104static void start_server(void) {
105  struct sockaddr_in addr;
106
107  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
108
109  ASSERT_OK(uv_tcp_init(uv_default_loop(), &server));
110  ASSERT_OK(uv_tcp_bind(&server, (struct sockaddr*) &addr, 0));
111  ASSERT_OK(uv_listen((uv_stream_t*) &server, 128, connection_cb));
112}
113
114TEST_IMPL(tcp_write_in_a_row) {
115#if defined(_WIN32)
116  RETURN_SKIP("tcp_write_in_a_row does not work on Windows");
117#elif defined(__PASE__)
118  RETURN_SKIP("tcp_write_in_a_row does not work on IBM i PASE");
119#else
120  uv_connect_t connect_req;
121  struct sockaddr_in addr;
122
123  start_server();
124
125  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
126
127  ASSERT_OK(uv_tcp_init(uv_default_loop(), &client));
128  ASSERT_OK(uv_tcp_connect(&connect_req,
129                           &client,
130                           (struct sockaddr*) &addr,
131                           connect_cb));
132
133  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
134
135  ASSERT_EQ(1, connect_cb_called);
136  ASSERT_EQ(3, close_cb_called);
137  ASSERT_EQ(1, connection_cb_called);
138  ASSERT_EQ(2, write_cb_called);
139
140  MAKE_VALGRIND_HAPPY(uv_default_loop());
141  return 0;
142#endif
143}
144