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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 /* this test is Unix only */
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23 #ifndef _WIN32
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24
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25 #include "uv.h"
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26 #include "task.h"
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27
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28 #include <stdio.h>
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29 #include <string.h>
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30
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31 static struct sockaddr_in addr;
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32 static uv_tcp_t tcp_server;
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33 static uv_tcp_t tcp_outgoing[2];
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34 static uv_tcp_t tcp_incoming[ARRAY_SIZE(tcp_outgoing)];
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35 static uv_connect_t connect_reqs[ARRAY_SIZE(tcp_outgoing)];
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36 static uv_tcp_t tcp_check;
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37 static uv_connect_t tcp_check_req;
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38 static uv_write_t write_reqs[ARRAY_SIZE(tcp_outgoing)];
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39 static unsigned int got_connections;
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40 static unsigned int close_cb_called;
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41 static unsigned int write_cb_called;
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42 static unsigned int read_cb_called;
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43 static unsigned int pending_incoming;
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44
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45 static void close_cb(uv_handle_t* handle) {
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46 close_cb_called++;
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47 }
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48
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49 static void write_cb(uv_write_t* req, int status) {
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50 ASSERT_OK(status);
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51 write_cb_called++;
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52 }
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53
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54 static void connect_cb(uv_connect_t* req, int status) {
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55 unsigned int i;
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56 uv_buf_t buf;
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57 uv_stream_t* outgoing;
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58
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59 if (req == &tcp_check_req) {
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60 ASSERT(status);
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61
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62 /*
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63 * Time to finish the test: close both the check and pending incoming
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64 * connections
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65 */
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66 uv_close((uv_handle_t*) &tcp_incoming[pending_incoming], close_cb);
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67 uv_close((uv_handle_t*) &tcp_check, close_cb);
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68 return;
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69 }
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70
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71 ASSERT_OK(status);
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72 ASSERT_LE(connect_reqs, req);
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73 ASSERT_LE(req, connect_reqs + ARRAY_SIZE(connect_reqs));
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74 i = req - connect_reqs;
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75
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76 buf = uv_buf_init("x", 1);
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77 outgoing = (uv_stream_t*) &tcp_outgoing[i];
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78 ASSERT_OK(uv_write(&write_reqs[i], outgoing, &buf, 1, write_cb));
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79 }
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80
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81 static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {
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82 static char slab[1];
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83 buf->base = slab;
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84 buf->len = sizeof(slab);
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85 }
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86
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87 static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
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88 uv_loop_t* loop;
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89 unsigned int i;
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90
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91 pending_incoming = (uv_tcp_t*) stream - &tcp_incoming[0];
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92 ASSERT_LT(pending_incoming, got_connections);
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93 ASSERT_OK(uv_read_stop(stream));
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94 ASSERT_EQ(1, nread);
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95
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96 loop = stream->loop;
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97 read_cb_called++;
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98
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99 /* Close all active incomings, except current one */
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100 for (i = 0; i < got_connections; i++) {
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101 if (i != pending_incoming)
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102 uv_close((uv_handle_t*) &tcp_incoming[i], close_cb);
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103 }
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104
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105 /* Close server, so no one will connect to it */
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106 uv_close((uv_handle_t*) &tcp_server, close_cb);
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107
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108 /* Create new fd that should be one of the closed incomings */
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109 ASSERT_OK(uv_tcp_init(loop, &tcp_check));
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110 ASSERT_OK(uv_tcp_connect(&tcp_check_req,
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111 &tcp_check,
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112 (const struct sockaddr*) &addr,
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113 connect_cb));
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114 ASSERT_OK(uv_read_start((uv_stream_t*) &tcp_check, alloc_cb, read_cb));
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115 }
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116
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117 static void connection_cb(uv_stream_t* server, int status) {
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118 unsigned int i;
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119 uv_tcp_t* incoming;
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120
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121 ASSERT_PTR_EQ(server, (uv_stream_t*) &tcp_server);
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122
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123 /* Ignore tcp_check connection */
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124 if (got_connections == ARRAY_SIZE(tcp_incoming))
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125 return;
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126
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127 /* Accept everyone */
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128 incoming = &tcp_incoming[got_connections++];
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129 ASSERT_OK(uv_tcp_init(server->loop, incoming));
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130 ASSERT_OK(uv_accept(server, (uv_stream_t*) incoming));
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131
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132 if (got_connections != ARRAY_SIZE(tcp_incoming))
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133 return;
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134
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135 /* Once all clients are accepted - start reading */
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136 for (i = 0; i < ARRAY_SIZE(tcp_incoming); i++) {
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137 incoming = &tcp_incoming[i];
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138 ASSERT_OK(uv_read_start((uv_stream_t*) incoming, alloc_cb, read_cb));
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139 }
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140 }
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141
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142 TEST_IMPL(tcp_close_accept) {
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143 unsigned int i;
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144 uv_loop_t* loop;
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145 uv_tcp_t* client;
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146
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147 /*
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148 * A little explanation of what goes on below:
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149 *
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150 * We'll create server and connect to it using two clients, each writing one
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151 * byte once connected.
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152 *
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153 * When all clients will be accepted by server - we'll start reading from them
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154 * and, on first client's first byte, will close second client and server.
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155 * After that, we'll immediately initiate new connection to server using
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156 * tcp_check handle (thus, reusing fd from second client).
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157 *
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158 * In this situation uv__io_poll()'s event list should still contain read
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159 * event for second client, and, if not cleaned up properly, `tcp_check` will
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160 * receive stale event of second incoming and invoke `connect_cb` with zero
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161 * status.
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162 */
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163
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164 loop = uv_default_loop();
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165 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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166
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167 ASSERT_OK(uv_tcp_init(loop, &tcp_server));
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168 ASSERT_OK(uv_tcp_bind(&tcp_server, (const struct sockaddr*) &addr, 0));
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169 ASSERT_OK(uv_listen((uv_stream_t*) &tcp_server,
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170 ARRAY_SIZE(tcp_outgoing),
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171 connection_cb));
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172
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173 for (i = 0; i < ARRAY_SIZE(tcp_outgoing); i++) {
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174 client = tcp_outgoing + i;
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175
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176 ASSERT_OK(uv_tcp_init(loop, client));
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177 ASSERT_OK(uv_tcp_connect(&connect_reqs[i],
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178 client,
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179 (const struct sockaddr*) &addr,
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180 connect_cb));
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181 }
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182
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183 uv_run(loop, UV_RUN_DEFAULT);
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184
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185 ASSERT_EQ(ARRAY_SIZE(tcp_outgoing), got_connections);
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186 ASSERT_EQ((ARRAY_SIZE(tcp_outgoing) + 2), close_cb_called);
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187 ASSERT_EQ(ARRAY_SIZE(tcp_outgoing), write_cb_called);
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188 ASSERT_EQ(1, read_cb_called);
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189
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190 MAKE_VALGRIND_HAPPY(loop);
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191 return 0;
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192 }
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193
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194 #else
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195
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196 typedef int file_has_no_tests; /* ISO C forbids an empty translation unit. */
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197
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198 #endif /* !_WIN32 */
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