|
160
|
1 /* Copyright The 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
|
|
|
25 #include <stdio.h>
|
|
|
26 #include <stdlib.h>
|
|
|
27 #include <string.h>
|
|
|
28
|
|
|
29 static uv_udp_t server;
|
|
|
30 static uv_udp_t client;
|
|
|
31 static uv_check_t check_handle;
|
|
|
32 static uv_buf_t buf;
|
|
|
33 static struct sockaddr_in addr;
|
|
|
34 static char send_data[10];
|
|
|
35 static int check_cb_called;
|
|
|
36
|
|
|
37 #define N 5
|
|
|
38 static int recv_cnt;
|
|
|
39
|
|
|
40 static void alloc_cb(uv_handle_t* handle,
|
|
|
41 size_t suggested_size,
|
|
|
42 uv_buf_t* buf) {
|
|
|
43 static char slab[sizeof(send_data)];
|
|
|
44 buf->base = slab;
|
|
|
45 buf->len = sizeof(slab);
|
|
|
46 }
|
|
|
47
|
|
|
48 static void sv_recv_cb(uv_udp_t* handle,
|
|
|
49 ssize_t nread,
|
|
|
50 const uv_buf_t* rcvbuf,
|
|
|
51 const struct sockaddr* addr,
|
|
|
52 unsigned flags) {
|
|
|
53 /* |nread| can be zero when the kernel drops an incoming datagram after
|
|
|
54 * marking the file descriptor as readable but before libuv has a chance
|
|
|
55 * to receive it. Libuv still invokes the uv_udp_recv_cb callback to give
|
|
|
56 * back the memory from the uv_alloc_cb callback.
|
|
|
57 *
|
|
|
58 * See https://github.com/libuv/libuv/issues/4219.
|
|
|
59 */
|
|
|
60 recv_cnt++;
|
|
|
61 if (nread > 0)
|
|
|
62 ASSERT_EQ(nread, sizeof(send_data));
|
|
|
63 }
|
|
|
64
|
|
|
65 static void check_cb(uv_check_t* handle) {
|
|
|
66 ASSERT_PTR_EQ(&check_handle, handle);
|
|
|
67
|
|
|
68 /**
|
|
|
69 * sv_recv_cb() is called with nread set to zero to indicate
|
|
|
70 * there is no more udp packet in the kernel, so the actual
|
|
|
71 * recv_cnt is up to one larger than N. UDP being what it is,
|
|
|
72 * packets can get dropped so don't assume an exact count.
|
|
|
73 */
|
|
|
74 ASSERT_GE(recv_cnt, 1);
|
|
|
75 ASSERT_LE(recv_cnt, N+1);
|
|
|
76 check_cb_called = 1;
|
|
|
77
|
|
|
78 /* we are done */
|
|
|
79 ASSERT_OK(uv_check_stop(handle));
|
|
|
80 uv_close((uv_handle_t*) &client, NULL);
|
|
|
81 uv_close((uv_handle_t*) &check_handle, NULL);
|
|
|
82 uv_close((uv_handle_t*) &server, NULL);
|
|
|
83 }
|
|
|
84
|
|
|
85
|
|
|
86 TEST_IMPL(udp_recv_in_a_row) {
|
|
|
87 int i, r;
|
|
|
88
|
|
|
89 ASSERT_OK(uv_check_init(uv_default_loop(), &check_handle));
|
|
|
90 ASSERT_OK(uv_check_start(&check_handle, check_cb));
|
|
|
91
|
|
|
92 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
|
|
|
93
|
|
|
94 ASSERT_OK(uv_udp_init(uv_default_loop(), &server));
|
|
|
95 ASSERT_OK(uv_udp_bind(&server, (const struct sockaddr*) &addr, 0));
|
|
|
96 ASSERT_OK(uv_udp_recv_start(&server, alloc_cb, sv_recv_cb));
|
|
|
97
|
|
|
98 ASSERT_OK(uv_udp_init(uv_default_loop(), &client));
|
|
|
99
|
|
|
100 /* send N-1 udp packets */
|
|
|
101 buf = uv_buf_init(send_data, sizeof(send_data));
|
|
|
102 for (i = 0; i < N - 1; i ++) {
|
|
|
103 r = uv_udp_try_send(&client,
|
|
|
104 &buf,
|
|
|
105 1,
|
|
|
106 (const struct sockaddr*) &addr);
|
|
|
107 ASSERT_EQ(sizeof(send_data), r);
|
|
|
108 }
|
|
|
109
|
|
|
110 /* send an empty udp packet */
|
|
|
111 buf = uv_buf_init(NULL, 0);
|
|
|
112 r = uv_udp_try_send(&client,
|
|
|
113 &buf,
|
|
|
114 1,
|
|
|
115 (const struct sockaddr*) &addr);
|
|
|
116 ASSERT_OK(r);
|
|
|
117
|
|
|
118 /* check_cb() asserts that the N packets can be received
|
|
|
119 * before it gets called.
|
|
|
120 */
|
|
|
121
|
|
|
122 ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
|
|
|
123
|
|
|
124 ASSERT(check_cb_called);
|
|
|
125
|
|
|
126 MAKE_VALGRIND_HAPPY(uv_default_loop());
|
|
|
127 return 0;
|
|
|
128 }
|
