xref: /third_party/libuv/test/test-udp-mmsg.c (revision e66f31c5) 
1/* Copyright libuv 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 CHECK_HANDLE(handle) \
30  ASSERT_NE((uv_udp_t*)(handle) == &recver || (uv_udp_t*)(handle) == &sender, 0)
31
32#define BUFFER_MULTIPLIER 20
33#define MAX_DGRAM_SIZE (64 * 1024)
34#define NUM_SENDS 40
35#define EXPECTED_MMSG_ALLOCS (NUM_SENDS / BUFFER_MULTIPLIER)
36
37static uv_udp_t recver;
38static uv_udp_t sender;
39static int recv_cb_called;
40static int received_datagrams;
41static int close_cb_called;
42static int alloc_cb_called;
43
44
45static void alloc_cb(uv_handle_t* handle,
46                     size_t suggested_size,
47                     uv_buf_t* buf) {
48  size_t buffer_size;
49  CHECK_HANDLE(handle);
50
51  /* Only allocate enough room for multiple dgrams if we can actually recv them */
52  buffer_size = MAX_DGRAM_SIZE;
53  if (uv_udp_using_recvmmsg((uv_udp_t*)handle))
54    buffer_size *= BUFFER_MULTIPLIER;
55
56  /* Actually malloc to exercise free'ing the buffer later */
57  buf->base = malloc(buffer_size);
58  ASSERT_NOT_NULL(buf->base);
59  buf->len = buffer_size;
60  alloc_cb_called++;
61}
62
63
64static void close_cb(uv_handle_t* handle) {
65  CHECK_HANDLE(handle);
66  ASSERT(uv_is_closing(handle));
67  close_cb_called++;
68}
69
70
71static void recv_cb(uv_udp_t* handle,
72                    ssize_t nread,
73                    const uv_buf_t* rcvbuf,
74                    const struct sockaddr* addr,
75                    unsigned flags) {
76  ASSERT_GE(nread, 0);
77
78  /* free and return if this is a mmsg free-only callback invocation */
79  if (flags & UV_UDP_MMSG_FREE) {
80    ASSERT_OK(nread);
81    ASSERT_NULL(addr);
82    free(rcvbuf->base);
83    return;
84  }
85
86  if (nread == 0) {
87    /* There can be no more available data for the time being. */
88    ASSERT_NULL(addr);
89  } else {
90    ASSERT_EQ(4, nread);
91    ASSERT_NOT_NULL(addr);
92    ASSERT_MEM_EQ("PING", rcvbuf->base, nread);
93    received_datagrams++;
94  }
95
96  recv_cb_called++;
97  if (received_datagrams == NUM_SENDS) {
98    uv_close((uv_handle_t*) handle, close_cb);
99    uv_close((uv_handle_t*) &sender, close_cb);
100  }
101
102  /* Don't free if the buffer could be reused via mmsg */
103  if (rcvbuf && !(flags & UV_UDP_MMSG_CHUNK))
104    free(rcvbuf->base);
105}
106
107
108TEST_IMPL(udp_mmsg) {
109  struct sockaddr_in addr;
110  uv_buf_t buf;
111  int i;
112
113  ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
114
115  ASSERT_OK(uv_udp_init_ex(uv_default_loop(), &recver,
116                           AF_UNSPEC | UV_UDP_RECVMMSG));
117
118  ASSERT_OK(uv_udp_bind(&recver, (const struct sockaddr*) &addr, 0));
119
120  ASSERT_OK(uv_udp_recv_start(&recver, alloc_cb, recv_cb));
121
122  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
123
124  ASSERT_OK(uv_udp_init(uv_default_loop(), &sender));
125
126  buf = uv_buf_init("PING", 4);
127  for (i = 0; i < NUM_SENDS; i++) {
128    ASSERT_EQ(4, uv_udp_try_send(&sender, &buf, 1, (const struct sockaddr*) &addr));
129  }
130
131  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
132
133  ASSERT_EQ(2, close_cb_called);
134  ASSERT_EQ(received_datagrams, NUM_SENDS);
135
136  ASSERT_OK(sender.send_queue_size);
137  ASSERT_OK(recver.send_queue_size);
138
139  printf("%d allocs for %d recvs\n", alloc_cb_called, recv_cb_called);
140
141  /* On platforms that don't support mmsg, each recv gets its own alloc */
142  if (uv_udp_using_recvmmsg(&recver))
143    ASSERT_EQ(alloc_cb_called, EXPECTED_MMSG_ALLOCS);
144  else
145    ASSERT_EQ(alloc_cb_called, recv_cb_called);
146
147  MAKE_VALGRIND_HAPPY(uv_default_loop());
148  return 0;
149}
150