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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 <stdlib.h>
27 #include <string.h>
28 
29 #define MAX_BYTES 1024 * 1024
30 
31 static uv_tcp_t server;
32 static uv_tcp_t client;
33 static uv_tcp_t incoming;
34 static int connect_cb_called;
35 static int close_cb_called;
36 static int connection_cb_called;
37 static int bytes_read;
38 static int bytes_written;
39 
40 
close_cb(uv_handle_t * handle)41 static void close_cb(uv_handle_t* handle) {
42   close_cb_called++;
43 }
44 
45 
connect_cb(uv_connect_t * req,int status)46 static void connect_cb(uv_connect_t* req, int status) {
47   int r;
48   uv_buf_t buf;
49   ASSERT(status == 0);
50   connect_cb_called++;
51 
52   do {
53     buf = uv_buf_init("PING", 4);
54     r = uv_try_write((uv_stream_t*) &client, &buf, 1);
55     ASSERT(r > 0 || r == UV_EAGAIN);
56     if (r > 0) {
57       bytes_written += r;
58       break;
59     }
60   } while (1);
61 
62   do {
63     buf = uv_buf_init("", 0);
64     r = uv_try_write((uv_stream_t*) &client, &buf, 1);
65   } while (r != 0);
66   uv_close((uv_handle_t*) &client, close_cb);
67 }
68 
69 
alloc_cb(uv_handle_t * handle,size_t size,uv_buf_t * buf)70 static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {
71   static char base[1024];
72 
73   buf->base = base;
74   buf->len = sizeof(base);
75 }
76 
77 
read_cb(uv_stream_t * tcp,ssize_t nread,const uv_buf_t * buf)78 static void read_cb(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {
79   if (nread < 0) {
80     uv_close((uv_handle_t*) tcp, close_cb);
81     uv_close((uv_handle_t*) &server, close_cb);
82     return;
83   }
84 
85   bytes_read += nread;
86 }
87 
88 
connection_cb(uv_stream_t * tcp,int status)89 static void connection_cb(uv_stream_t* tcp, int status) {
90   ASSERT(status == 0);
91 
92   ASSERT(0 == uv_tcp_init(tcp->loop, &incoming));
93   ASSERT(0 == uv_accept(tcp, (uv_stream_t*) &incoming));
94 
95   connection_cb_called++;
96   ASSERT(0 == uv_read_start((uv_stream_t*) &incoming, alloc_cb, read_cb));
97 }
98 
99 
start_server(void)100 static void start_server(void) {
101   struct sockaddr_in addr;
102 
103   ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
104 
105   ASSERT(0 == uv_tcp_init(uv_default_loop(), &server));
106   ASSERT(0 == uv_tcp_bind(&server, (struct sockaddr*) &addr, 0));
107   ASSERT(0 == uv_listen((uv_stream_t*) &server, 128, connection_cb));
108 }
109 
110 
TEST_IMPL(tcp_try_write)111 TEST_IMPL(tcp_try_write) {
112   uv_connect_t connect_req;
113   struct sockaddr_in addr;
114 
115   start_server();
116 
117   ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
118 
119   ASSERT(0 == uv_tcp_init(uv_default_loop(), &client));
120   ASSERT(0 == uv_tcp_connect(&connect_req,
121                              &client,
122                              (struct sockaddr*) &addr,
123                              connect_cb));
124 
125   ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT));
126 
127   ASSERT(connect_cb_called == 1);
128   ASSERT(close_cb_called == 3);
129   ASSERT(connection_cb_called == 1);
130   ASSERT(bytes_read == bytes_written);
131   ASSERT(bytes_written > 0);
132 
133   MAKE_VALGRIND_HAPPY();
134   return 0;
135 }
136