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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 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 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 ASSERT_EQ(1, uv_is_closing(handle));
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58 close_cb_called++;
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59 }
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60
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61
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62 static void cl_recv_cb(uv_udp_t* handle,
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63 ssize_t nread,
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64 const uv_buf_t* buf,
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65 const struct sockaddr* addr,
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66 unsigned flags) {
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67 CHECK_HANDLE(handle);
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68 ASSERT_OK(flags);
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69
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70 if (nread < 0) {
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71 ASSERT(0 && "unexpected error");
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72 }
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73
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74 if (nread == 0) {
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75 /* Returning unused buffer. Don't count towards cl_recv_cb_called */
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76 ASSERT_NULL(addr);
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77 return;
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78 }
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79
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80 ASSERT_NOT_NULL(addr);
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81 ASSERT_EQ(4, nread);
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82 ASSERT(!memcmp("PONG", buf->base, nread));
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83
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84 cl_recv_cb_called++;
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85
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86 uv_close((uv_handle_t*) handle, close_cb);
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87 }
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88
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89
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90 static void cl_send_cb(uv_udp_send_t* req, int status) {
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91 int r;
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92
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93 ASSERT_NOT_NULL(req);
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94 ASSERT_OK(status);
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95 CHECK_HANDLE(req->handle);
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96
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97 r = uv_udp_recv_start(req->handle, alloc_cb, cl_recv_cb);
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98 ASSERT_OK(r);
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99
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100 cl_send_cb_called++;
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101 }
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102
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103
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104 static void sv_send_cb(uv_udp_send_t* req, int status) {
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105 ASSERT_NOT_NULL(req);
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106 ASSERT_OK(status);
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107 CHECK_HANDLE(req->handle);
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108
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109 uv_close((uv_handle_t*) req->handle, close_cb);
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110 free(req);
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111
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112 sv_send_cb_called++;
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113 }
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114
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115
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116 static void sv_recv_cb(uv_udp_t* handle,
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117 ssize_t nread,
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118 const uv_buf_t* rcvbuf,
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119 const struct sockaddr* addr,
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120 unsigned flags) {
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121 uv_udp_send_t* req;
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122 uv_buf_t sndbuf;
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123 int r;
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124
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125 if (nread < 0) {
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126 ASSERT(0 && "unexpected error");
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127 }
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128
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129 if (nread == 0) {
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130 /* Returning unused buffer. Don't count towards sv_recv_cb_called */
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131 ASSERT_NULL(addr);
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132 return;
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133 }
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134
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135 CHECK_HANDLE(handle);
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136 ASSERT_OK(flags);
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137
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138 ASSERT_NOT_NULL(addr);
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139 ASSERT_EQ(4, nread);
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140 ASSERT(!memcmp("PING", rcvbuf->base, nread));
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141
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142 /* FIXME? `uv_udp_recv_stop` does what it says: recv_cb is not called
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143 * anymore. That's problematic because the read buffer won't be returned
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144 * either... Not sure I like that but it's consistent with `uv_read_stop`.
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145 */
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146 r = uv_udp_recv_stop(handle);
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147 ASSERT_OK(r);
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148
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149 req = malloc(sizeof *req);
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150 ASSERT_NOT_NULL(req);
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151
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152 sndbuf = uv_buf_init("PONG", 4);
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153 r = uv_udp_send(req, handle, &sndbuf, 1, addr, sv_send_cb);
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154 ASSERT_OK(r);
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155
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156 sv_recv_cb_called++;
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157 }
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158
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159
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160 TEST_IMPL(udp_send_and_recv) {
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161 struct sockaddr_in addr;
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162 uv_udp_send_t req;
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163 uv_buf_t buf;
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164 int r;
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165
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166 ASSERT_OK(uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));
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167
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168 r = uv_udp_init(uv_default_loop(), &server);
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169 ASSERT_OK(r);
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170
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171 r = uv_udp_bind(&server, (const struct sockaddr*) &addr, 0);
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172 ASSERT_OK(r);
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173
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174 r = uv_udp_recv_start(&server, alloc_cb, sv_recv_cb);
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175 ASSERT_OK(r);
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176
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177 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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178
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179 r = uv_udp_init(uv_default_loop(), &client);
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180 ASSERT_OK(r);
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181
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182 /* client sends "PING", expects "PONG" */
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183 buf = uv_buf_init("PING", 4);
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184
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185 r = uv_udp_send(&req,
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186 &client,
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187 &buf,
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188 1,
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189 (const struct sockaddr*) &addr,
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190 cl_send_cb);
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191 ASSERT_OK(r);
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192
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193 ASSERT_OK(close_cb_called);
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194 ASSERT_OK(cl_send_cb_called);
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195 ASSERT_OK(cl_recv_cb_called);
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196 ASSERT_OK(sv_send_cb_called);
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197 ASSERT_OK(sv_recv_cb_called);
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198
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199 uv_run(uv_default_loop(), UV_RUN_DEFAULT);
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200
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201 ASSERT_EQ(1, cl_send_cb_called);
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202 ASSERT_EQ(1, cl_recv_cb_called);
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203 ASSERT_EQ(1, sv_send_cb_called);
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204 ASSERT_EQ(1, sv_recv_cb_called);
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205 ASSERT_EQ(2, close_cb_called);
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206
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207 ASSERT_OK(client.send_queue_size);
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208 ASSERT_OK(server.send_queue_size);
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209
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210 MAKE_VALGRIND_HAPPY(uv_default_loop());
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211 return 0;
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212 }
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