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160
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1 /* Copyright libuv project contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #include "uv.h"
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23 #include "task.h"
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24
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25 #include <stdio.h>
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26 #include <stdlib.h>
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27 #include <string.h>
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28
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29 #if !defined(__linux__) && !defined(__FreeBSD__) && \
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30 !defined(__DragonFly__) && !defined(__sun) && !defined(_AIX73)
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31
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32 TEST_IMPL(udp_reuseport) {
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33 struct sockaddr_in addr1, addr2, addr3;
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34 uv_loop_t* loop;
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35 uv_udp_t handle1, handle2, handle3;
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36 int r;
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37
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38 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr1));
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39 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT_2, &addr2));
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40 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT_3, &addr3));
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41
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42 loop = uv_default_loop();
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43 ASSERT_NOT_NULL(loop);
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44
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45 r = uv_udp_init(loop, &handle1);
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46 ASSERT_OK(r);
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47
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48 r = uv_udp_bind(&handle1, (const struct sockaddr*) &addr1, UV_UDP_REUSEADDR);
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49 ASSERT_OK(r);
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50
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51 r = uv_udp_init(loop, &handle2);
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52 ASSERT_OK(r);
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53
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54 r = uv_udp_bind(&handle2, (const struct sockaddr*) &addr2, UV_UDP_REUSEPORT);
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55 ASSERT_EQ(r, UV_ENOTSUP);
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56
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57 r = uv_udp_init(loop, &handle3);
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58 ASSERT_OK(r);
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59
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60 /* For platforms where SO_REUSEPORTs don't have the capability of
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61 * load balancing, specifying both UV_UDP_REUSEADDR and UV_UDP_REUSEPORT
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62 * in flags will fail, returning an UV_ENOTSUP error. */
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63 r = uv_udp_bind(&handle3, (const struct sockaddr*) &addr3,
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64 UV_UDP_REUSEADDR | UV_UDP_REUSEPORT);
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65 ASSERT_EQ(r, UV_ENOTSUP);
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66
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67 MAKE_VALGRIND_HAPPY(loop);
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68
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69 return 0;
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70 }
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71
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72 #else
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73
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74 #define NUM_RECEIVING_THREADS 2
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75 #define MAX_UDP_DATAGRAMS 10
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76
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77 static uv_udp_t udp_send_handles[MAX_UDP_DATAGRAMS];
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78 static uv_udp_send_t udp_send_requests[MAX_UDP_DATAGRAMS];
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79
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80 static uv_sem_t semaphore;
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81
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82 static uv_mutex_t mutex;
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83 static unsigned int received;
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84
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85 static unsigned int thread_loop1_recv;
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86 static unsigned int thread_loop2_recv;
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87 static unsigned int sent;
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88
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89 static uv_loop_t* main_loop;
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90 static uv_loop_t thread_loop1;
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91 static uv_loop_t thread_loop2;
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92 static uv_udp_t thread_handle1;
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93 static uv_udp_t thread_handle2;
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94 static uv_timer_t thread_timer_handle1;
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95 static uv_timer_t thread_timer_handle2;
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96
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97 static void alloc_cb(uv_handle_t* handle,
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98 size_t suggested_size,
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99 uv_buf_t* buf) {
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100 buf->base = malloc(suggested_size);
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101 buf->len = (int) suggested_size;
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102 }
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103
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104 static void ticktack(uv_timer_t* timer) {
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105 int done = 0;
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106
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107 ASSERT(timer == &thread_timer_handle1 || timer == &thread_timer_handle2);
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108
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109 uv_mutex_lock(&mutex);
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110 if (received == MAX_UDP_DATAGRAMS) {
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111 done = 1;
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112 }
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113 uv_mutex_unlock(&mutex);
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114
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115 if (done) {
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116 uv_close((uv_handle_t*) timer, NULL);
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117 if (timer->loop == &thread_loop1)
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118 uv_close((uv_handle_t*) &thread_handle1, NULL);
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119 if (timer->loop == &thread_loop2)
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120 uv_close((uv_handle_t*) &thread_handle2, NULL);
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121 }
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122 }
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123
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124 static void on_recv(uv_udp_t* handle,
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125 ssize_t nr,
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126 const uv_buf_t* buf,
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127 const struct sockaddr* addr,
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128 unsigned flags) {
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129 ASSERT_OK(flags);
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130 ASSERT(handle == &thread_handle1 || handle == &thread_handle2);
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131
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132 ASSERT_GE(nr, 0);
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133
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134 if (nr == 0) {
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135 ASSERT_NULL(addr);
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136 free(buf->base);
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137 return;
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138 }
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139
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140 ASSERT_NOT_NULL(addr);
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141 ASSERT_EQ(5, nr);
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142 ASSERT(!memcmp("Hello", buf->base, nr));
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143 free(buf->base);
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144
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145 if (handle->loop == &thread_loop1)
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146 thread_loop1_recv++;
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147
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148 if (handle->loop == &thread_loop2)
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149 thread_loop2_recv++;
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150
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151 uv_mutex_lock(&mutex);
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152 received++;
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153 uv_mutex_unlock(&mutex);
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154 }
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155
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156 static void on_send(uv_udp_send_t* req, int status) {
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157 ASSERT_OK(status);
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158 ASSERT_PTR_EQ(req->handle->loop, main_loop);
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159
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160 if (++sent == MAX_UDP_DATAGRAMS)
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161 uv_close((uv_handle_t*) req->handle, NULL);
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162 }
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163
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164 static void bind_socket_and_prepare_recv(uv_loop_t* loop, uv_udp_t* handle) {
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165 struct sockaddr_in addr;
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166 int r;
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167
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168 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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169
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170 r = uv_udp_init(loop, handle);
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171 ASSERT_OK(r);
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172
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173 /* For platforms where SO_REUSEPORTs have the capability of
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174 * load balancing, specifying both UV_UDP_REUSEADDR and
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175 * UV_UDP_REUSEPORT in flags is allowed and SO_REUSEPORT will
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176 * always override the behavior of SO_REUSEADDR. */
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177 r = uv_udp_bind(handle, (const struct sockaddr*) &addr,
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178 UV_UDP_REUSEADDR | UV_UDP_REUSEPORT);
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179 ASSERT_OK(r);
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180
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181 r = uv_udp_recv_start(handle, alloc_cb, on_recv);
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182 ASSERT_OK(r);
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183 }
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184
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185 static void run_event_loop(void* arg) {
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186 int r;
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187 uv_udp_t* handle;
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188 uv_timer_t* timer;
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189 uv_loop_t* loop = (uv_loop_t*) arg;
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190 ASSERT(loop == &thread_loop1 || loop == &thread_loop2);
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191
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192 if (loop == &thread_loop1) {
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193 handle = &thread_handle1;
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194 timer = &thread_timer_handle1;
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195 } else {
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196 handle = &thread_handle2;
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197 timer = &thread_timer_handle2;
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198 }
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199
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200 bind_socket_and_prepare_recv(loop, handle);
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201 r = uv_timer_init(loop, timer);
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202 ASSERT_OK(r);
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203 r = uv_timer_start(timer, ticktack, 0, 10);
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204 ASSERT_OK(r);
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205
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206 /* Notify the main thread to start sending data. */
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207 uv_sem_post(&semaphore);
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208 r = uv_run(loop, UV_RUN_DEFAULT);
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209 ASSERT_OK(r);
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210 }
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211
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212 TEST_IMPL(udp_reuseport) {
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213 struct sockaddr_in addr;
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214 uv_buf_t buf;
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215 int r;
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216 int i;
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217
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218 r = uv_mutex_init(&mutex);
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219 ASSERT_OK(r);
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220
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221 r = uv_sem_init(&semaphore, 0);
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222 ASSERT_OK(r);
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223
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224 main_loop = uv_default_loop();
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225 ASSERT_NOT_NULL(main_loop);
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226
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227 /* Run event loops of receiving sockets in separate threads. */
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228 uv_loop_init(&thread_loop1);
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229 uv_loop_init(&thread_loop2);
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230 uv_thread_t thread_loop_id1;
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231 uv_thread_t thread_loop_id2;
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232 uv_thread_create(&thread_loop_id1, run_event_loop, &thread_loop1);
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233 uv_thread_create(&thread_loop_id2, run_event_loop, &thread_loop2);
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234
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235 /* Wait until all threads to poll for receiving datagrams
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236 * before we start to sending. Otherwise the incoming datagrams
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237 * might not be distributed across all receiving threads. */
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238 for (i = 0; i < NUM_RECEIVING_THREADS; i++)
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239 uv_sem_wait(&semaphore);
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240 /* Now we know all threads are up and entering the uv_run(),
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241 * but we still sleep a little bit just for dual fail-safe. */
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242 uv_sleep(100);
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243
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244 /* Start sending datagrams to the peers. */
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245 buf = uv_buf_init("Hello", 5);
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246 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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247 for (i = 0; i < MAX_UDP_DATAGRAMS; i++) {
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248 r = uv_udp_init(main_loop, &udp_send_handles[i]);
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249 ASSERT_OK(r);
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250 r = uv_udp_send(&udp_send_requests[i],
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251 &udp_send_handles[i],
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252 &buf,
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253 1,
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254 (const struct sockaddr*) &addr,
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255 on_send);
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256 ASSERT_OK(r);
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257 }
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258
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259 r = uv_run(main_loop, UV_RUN_DEFAULT);
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260 ASSERT_OK(r);
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261
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262 /* Wait for all threads to exit. */
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263 uv_thread_join(&thread_loop_id1);
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264 uv_thread_join(&thread_loop_id2);
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265
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266 /* Verify if each receiving socket per event loop received datagrams
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267 * and the amount of received datagrams matches the one of sent datagrams.
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268 */
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269 ASSERT_EQ(received, MAX_UDP_DATAGRAMS);
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270 ASSERT_EQ(sent, MAX_UDP_DATAGRAMS);
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271 ASSERT_GT(thread_loop1_recv, 0);
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272 ASSERT_GT(thread_loop2_recv, 0);
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273 ASSERT_EQ(thread_loop1_recv + thread_loop2_recv, sent);
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274
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275 /* Clean up. */
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276 uv_mutex_destroy(&mutex);
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277
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278 uv_sem_destroy(&semaphore);
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279
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280 uv_loop_close(&thread_loop1);
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281 uv_loop_close(&thread_loop2);
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282 MAKE_VALGRIND_HAPPY(main_loop);
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283
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284 return 0;
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285 }
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286
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287 #endif
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