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1 /* Copyright libuv project 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 static uv_udp_t server;
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33 static uv_udp_t client;
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34
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35 static int cl_send_cb_called;
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36 static int cl_recv_cb_called;
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37
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38 static int sv_send_cb_called;
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39 static int sv_recv_cb_called;
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40
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41 static int close_cb_called;
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42
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43
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44 static void sv_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 buf->base = slab;
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50 buf->len = sizeof(slab);
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51 }
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52
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53
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54 static void cl_alloc_cb(uv_handle_t* handle,
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55 size_t suggested_size,
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56 uv_buf_t* buf) {
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57 /* Do nothing, recv_cb should be called with UV_ENOBUFS. */
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58 }
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59
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60
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61 static void close_cb(uv_handle_t* handle) {
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62 CHECK_HANDLE(handle);
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63 ASSERT_EQ(1, uv_is_closing(handle));
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64 close_cb_called++;
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65 }
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66
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67
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68 static void cl_recv_cb(uv_udp_t* handle,
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69 ssize_t nread,
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70 const uv_buf_t* buf,
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71 const struct sockaddr* addr,
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72 unsigned flags) {
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73 CHECK_HANDLE(handle);
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74 ASSERT_OK(flags);
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75 ASSERT_EQ(nread, UV_ENOBUFS);
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76
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77 cl_recv_cb_called++;
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78
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79 uv_close((uv_handle_t*) handle, close_cb);
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80 }
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81
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82
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83 static void cl_send_cb(uv_udp_send_t* req, int status) {
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84 int r;
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85
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86 ASSERT_NOT_NULL(req);
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87 ASSERT_OK(status);
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88 CHECK_HANDLE(req->handle);
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89
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90 r = uv_udp_recv_start(req->handle, cl_alloc_cb, cl_recv_cb);
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91 ASSERT_OK(r);
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92
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93 cl_send_cb_called++;
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94 }
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95
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96
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97 static void sv_send_cb(uv_udp_send_t* req, int status) {
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98 ASSERT_NOT_NULL(req);
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99 ASSERT_OK(status);
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100 CHECK_HANDLE(req->handle);
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101
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102 uv_close((uv_handle_t*) req->handle, close_cb);
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103 free(req);
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104
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105 sv_send_cb_called++;
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106 }
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107
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108
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109 static void sv_recv_cb(uv_udp_t* handle,
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110 ssize_t nread,
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111 const uv_buf_t* rcvbuf,
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112 const struct sockaddr* addr,
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113 unsigned flags) {
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114 uv_udp_send_t* req;
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115 uv_buf_t sndbuf;
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116 int r;
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117
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118 if (nread < 0) {
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119 ASSERT(0 && "unexpected error");
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120 }
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121
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122 if (nread == 0) {
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123 /* Returning unused buffer. Don't count towards sv_recv_cb_called */
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124 ASSERT_NULL(addr);
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125 return;
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126 }
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127
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128 CHECK_HANDLE(handle);
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129 ASSERT_OK(flags);
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130
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131 ASSERT_NOT_NULL(addr);
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132 ASSERT_EQ(4, nread);
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133 ASSERT(!memcmp("PING", rcvbuf->base, nread));
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134
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135 r = uv_udp_recv_stop(handle);
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136 ASSERT_OK(r);
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137
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138 req = malloc(sizeof *req);
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139 ASSERT_NOT_NULL(req);
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140
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141 sndbuf = uv_buf_init("PONG", 4);
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142 r = uv_udp_send(req, handle, &sndbuf, 1, addr, sv_send_cb);
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143 ASSERT_OK(r);
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144
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145 sv_recv_cb_called++;
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146 }
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147
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148
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149 TEST_IMPL(udp_alloc_cb_fail) {
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150 struct sockaddr_in addr;
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151 uv_udp_send_t req;
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152 uv_buf_t buf;
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153 int r;
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154
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155 ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
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156
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157 r = uv_udp_init(uv_default_loop(), &server);
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158 ASSERT_OK(r);
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159
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160 r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
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161 ASSERT_OK(r);
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162
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163 r = uv_udp_recv_start(&server, sv_alloc_cb, sv_recv_cb);
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164 ASSERT_OK(r);
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165
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166 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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167
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168 r = uv_udp_init(uv_default_loop(), &client);
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169 ASSERT_OK(r);
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170
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171 buf = uv_buf_init("PING", 4);
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172 r = uv_udp_send(&req,
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173 &client,
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174 &buf,
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175 1,
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176 (const struct sockaddr*) &addr,
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177 cl_send_cb);
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178 ASSERT_OK(r);
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179
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180 ASSERT_OK(close_cb_called);
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181 ASSERT_OK(cl_send_cb_called);
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182 ASSERT_OK(cl_recv_cb_called);
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183 ASSERT_OK(sv_send_cb_called);
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184 ASSERT_OK(sv_recv_cb_called);
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185
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186 uv_run(uv_default_loop(), UV_RUN_DEFAULT);
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187
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188 ASSERT_EQ(1, cl_send_cb_called);
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189 ASSERT_EQ(1, cl_recv_cb_called);
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190 ASSERT_EQ(1, sv_send_cb_called);
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191 ASSERT_EQ(1, sv_recv_cb_called);
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192 ASSERT_EQ(2, close_cb_called);
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193
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194 MAKE_VALGRIND_HAPPY(uv_default_loop());
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195 return 0;
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196 }
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