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160
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1 /* Copyright Joyent, Inc. and other Node 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 #define CHECK_HANDLE(handle) \
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30 ASSERT_NE((uv_udp_t*)(handle) == &server || (uv_udp_t*)(handle) == &client, 0)
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31
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32 #define MULTICAST_ADDR "239.255.0.1"
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33
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34 static uv_udp_t server;
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35 static uv_udp_t client;
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36 static uv_udp_send_t req;
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37 static uv_udp_send_t req_ss;
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38
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39 static int darwin_ebusy_errors;
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40 static int cl_recv_cb_called;
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41 static int sv_send_cb_called;
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42 static int close_cb_called;
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43
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44 static void alloc_cb(uv_handle_t* handle,
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45 size_t suggested_size,
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46 uv_buf_t* buf) {
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47 static char slab[65536];
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48 CHECK_HANDLE(handle);
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49 ASSERT_LE(suggested_size, sizeof(slab));
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50 buf->base = slab;
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51 buf->len = sizeof(slab);
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52 }
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53
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54
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55 static void close_cb(uv_handle_t* handle) {
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56 CHECK_HANDLE(handle);
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57 close_cb_called++;
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58 }
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59
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60
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61 static void sv_send_cb(uv_udp_send_t* req, int status) {
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62 ASSERT_NOT_NULL(req);
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63 ASSERT_OK(status);
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64 CHECK_HANDLE(req->handle);
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65
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66 sv_send_cb_called++;
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67
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68 if (sv_send_cb_called == 2)
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69 uv_close((uv_handle_t*) req->handle, close_cb);
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70 }
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71
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72
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73 static int do_send(uv_udp_send_t* send_req) {
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74 uv_buf_t buf;
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75 struct sockaddr_in addr;
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76
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77 buf = uv_buf_init("PING", 4);
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78
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79 ASSERT_OK(uv_ip4_addr(MULTICAST_ADDR, TEST_PORT, &addr));
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80
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81 /* client sends "PING" */
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82 return uv_udp_send(send_req,
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83 &client,
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84 &buf,
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85 1,
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86 (const struct sockaddr*) &addr,
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87 sv_send_cb);
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88 }
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89
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90
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91 static void cl_recv_cb(uv_udp_t* handle,
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92 ssize_t nread,
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93 const uv_buf_t* buf,
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94 const struct sockaddr* addr,
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95 unsigned flags) {
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96 CHECK_HANDLE(handle);
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97 ASSERT_OK(flags);
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98
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99 if (nread < 0) {
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100 ASSERT(0 && "unexpected error");
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101 }
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102
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103 if (nread == 0) {
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104 /* Returning unused buffer. Don't count towards cl_recv_cb_called */
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105 ASSERT_NULL(addr);
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106 return;
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107 }
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108
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109 ASSERT_NOT_NULL(addr);
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110 ASSERT_EQ(4, nread);
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111 ASSERT(!memcmp("PING", buf->base, nread));
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112
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113 cl_recv_cb_called++;
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114
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115 if (cl_recv_cb_called == 2) {
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116 /* we are done with the server handle, we can close it */
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117 uv_close((uv_handle_t*) &server, close_cb);
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118 } else {
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119 int r;
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120 char source_addr[64];
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121
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122 r = uv_ip4_name((const struct sockaddr_in*)addr, source_addr, sizeof(source_addr));
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123 ASSERT_OK(r);
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124
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125 r = uv_udp_set_membership(&server, MULTICAST_ADDR, NULL, UV_LEAVE_GROUP);
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126 ASSERT_OK(r);
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127
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128 #if !defined(__NetBSD__)
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129 r = uv_udp_set_source_membership(&server, MULTICAST_ADDR, NULL, source_addr, UV_JOIN_GROUP);
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130 #if defined(__APPLE__)
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131 if (r == UV_EBUSY) {
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132 uv_close((uv_handle_t*) &server, close_cb);
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133 darwin_ebusy_errors++;
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134 return;
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135 }
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136 #endif
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137 ASSERT_OK(r);
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138 #endif
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139
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140 r = do_send(&req_ss);
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141 ASSERT_OK(r);
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142 }
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143 }
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144
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145
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146 TEST_IMPL(udp_multicast_join) {
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147 #if defined(__OpenBSD__)
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148 RETURN_SKIP("Test does not currently work in OpenBSD");
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149 #endif
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150 int r;
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151 struct sockaddr_in addr;
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152
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153 ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
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154
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155 r = uv_udp_init(uv_default_loop(), &server);
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156 ASSERT_OK(r);
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157
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158 r = uv_udp_init(uv_default_loop(), &client);
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159 ASSERT_OK(r);
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160
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161 /* bind to the desired port */
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162 r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
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163 ASSERT_OK(r);
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164
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165 /* join the multicast channel */
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166 r = uv_udp_set_membership(&server, MULTICAST_ADDR, NULL, UV_JOIN_GROUP);
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167 if (r == UV_ENODEV)
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168 RETURN_SKIP("No multicast support.");
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169 if (r == UV_ENOEXEC)
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170 RETURN_SKIP("No multicast support (likely a firewall issue).");
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171 ASSERT_OK(r);
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172 #if defined(__ANDROID__)
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173 /* It returns an ENOSYS error */
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174 RETURN_SKIP("Test does not currently work in ANDROID");
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175 #endif
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176
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177 r = uv_udp_recv_start(&server, alloc_cb, cl_recv_cb);
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178 ASSERT_OK(r);
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179
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180 r = do_send(&req);
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181 ASSERT_OK(r);
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182
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183 ASSERT_OK(close_cb_called);
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184 ASSERT_OK(cl_recv_cb_called);
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185 ASSERT_OK(sv_send_cb_called);
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186
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187 /* run the loop till all events are processed */
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188 uv_run(uv_default_loop(), UV_RUN_DEFAULT);
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189
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190 if (darwin_ebusy_errors > 0)
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191 RETURN_SKIP("Unexplained macOS IP_ADD_SOURCE_MEMBERSHIP EBUSY bug");
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192
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193 ASSERT_EQ(2, cl_recv_cb_called);
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194 ASSERT_EQ(2, sv_send_cb_called);
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195 ASSERT_EQ(2, close_cb_called);
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196
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197 MAKE_VALGRIND_HAPPY(uv_default_loop());
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198 return 0;
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199 }
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