<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `libstd/net/udp.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>udp.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../settings.html"><img src="../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10"> 10</span> <span id="11"> 11</span> <span id="12"> 12</span> <span id="13"> 13</span> <span id="14"> 14</span> <span id="15"> 15</span> <span id="16"> 16</span> <span id="17"> 17</span> <span id="18"> 18</span> <span id="19"> 19</span> <span id="20"> 20</span> <span id="21"> 21</span> <span id="22"> 22</span> <span id="23"> 23</span> <span id="24"> 24</span> <span id="25"> 25</span> <span id="26"> 26</span> <span id="27"> 27</span> <span id="28"> 28</span> <span id="29"> 29</span> <span id="30"> 30</span> <span id="31"> 31</span> <span id="32"> 32</span> <span id="33"> 33</span> <span id="34"> 34</span> <span id="35"> 35</span> <span id="36"> 36</span> <span id="37"> 37</span> <span id="38"> 38</span> <span id="39"> 39</span> <span id="40"> 40</span> <span id="41"> 41</span> <span id="42"> 42</span> <span id="43"> 43</span> <span id="44"> 44</span> <span id="45"> 45</span> <span id="46"> 46</span> <span id="47"> 47</span> <span id="48"> 48</span> <span id="49"> 49</span> <span id="50"> 50</span> <span id="51"> 51</span> <span id="52"> 52</span> <span id="53"> 53</span> <span id="54"> 54</span> <span id="55"> 55</span> <span id="56"> 56</span> <span id="57"> 57</span> <span id="58"> 58</span> <span id="59"> 59</span> <span id="60"> 60</span> <span id="61"> 61</span> <span id="62"> 62</span> <span id="63"> 63</span> <span id="64"> 64</span> <span id="65"> 65</span> <span id="66"> 66</span> <span id="67"> 67</span> <span id="68"> 68</span> <span id="69"> 69</span> <span id="70"> 70</span> <span id="71"> 71</span> <span id="72"> 72</span> <span id="73"> 73</span> <span id="74"> 74</span> <span id="75"> 75</span> <span id="76"> 76</span> <span id="77"> 77</span> <span id="78"> 78</span> <span id="79"> 79</span> <span id="80"> 80</span> <span id="81"> 81</span> <span id="82"> 82</span> <span id="83"> 83</span> <span id="84"> 84</span> <span id="85"> 85</span> <span id="86"> 86</span> <span id="87"> 87</span> <span id="88"> 88</span> <span id="89"> 89</span> <span id="90"> 90</span> <span id="91"> 91</span> <span id="92"> 92</span> <span id="93"> 93</span> <span id="94"> 94</span> <span id="95"> 95</span> <span id="96"> 96</span> <span id="97"> 97</span> <span id="98"> 98</span> <span id="99"> 99</span> <span id="100"> 100</span> <span id="101"> 101</span> <span id="102"> 102</span> <span id="103"> 103</span> <span id="104"> 104</span> <span id="105"> 105</span> <span id="106"> 106</span> <span id="107"> 107</span> <span id="108"> 108</span> <span id="109"> 109</span> <span id="110"> 110</span> <span id="111"> 111</span> <span id="112"> 112</span> <span id="113"> 113</span> <span id="114"> 114</span> <span id="115"> 115</span> <span id="116"> 116</span> <span id="117"> 117</span> <span id="118"> 118</span> <span id="119"> 119</span> <span id="120"> 120</span> <span id="121"> 121</span> <span id="122"> 122</span> <span id="123"> 123</span> <span id="124"> 124</span> <span id="125"> 125</span> <span id="126"> 126</span> <span id="127"> 127</span> <span id="128"> 128</span> <span id="129"> 129</span> <span id="130"> 130</span> <span id="131"> 131</span> <span id="132"> 132</span> <span id="133"> 133</span> <span id="134"> 134</span> <span id="135"> 135</span> <span id="136"> 136</span> <span id="137"> 137</span> <span id="138"> 138</span> <span id="139"> 139</span> <span id="140"> 140</span> <span id="141"> 141</span> <span id="142"> 142</span> <span id="143"> 143</span> <span id="144"> 144</span> <span id="145"> 145</span> <span id="146"> 146</span> <span id="147"> 147</span> <span id="148"> 148</span> <span id="149"> 149</span> <span id="150"> 150</span> <span id="151"> 151</span> <span id="152"> 152</span> <span id="153"> 153</span> <span id="154"> 154</span> <span id="155"> 155</span> <span id="156"> 156</span> <span id="157"> 157</span> <span id="158"> 158</span> <span id="159"> 159</span> <span id="160"> 160</span> <span id="161"> 161</span> <span id="162"> 162</span> <span id="163"> 163</span> <span id="164"> 164</span> <span id="165"> 165</span> <span id="166"> 166</span> <span id="167"> 167</span> <span id="168"> 168</span> <span id="169"> 169</span> <span id="170"> 170</span> <span id="171"> 171</span> <span id="172"> 172</span> <span id="173"> 173</span> <span id="174"> 174</span> <span id="175"> 175</span> <span id="176"> 176</span> <span id="177"> 177</span> <span id="178"> 178</span> <span id="179"> 179</span> <span id="180"> 180</span> <span id="181"> 181</span> <span id="182"> 182</span> <span id="183"> 183</span> <span id="184"> 184</span> <span id="185"> 185</span> <span id="186"> 186</span> <span id="187"> 187</span> <span id="188"> 188</span> <span id="189"> 189</span> <span id="190"> 190</span> <span id="191"> 191</span> <span id="192"> 192</span> <span id="193"> 193</span> <span id="194"> 194</span> <span id="195"> 195</span> <span id="196"> 196</span> <span id="197"> 197</span> <span id="198"> 198</span> <span id="199"> 199</span> <span id="200"> 200</span> <span id="201"> 201</span> <span id="202"> 202</span> <span id="203"> 203</span> <span id="204"> 204</span> <span id="205"> 205</span> <span id="206"> 206</span> <span id="207"> 207</span> <span id="208"> 208</span> <span id="209"> 209</span> <span id="210"> 210</span> <span id="211"> 211</span> <span id="212"> 212</span> <span id="213"> 213</span> <span id="214"> 214</span> <span id="215"> 215</span> <span id="216"> 216</span> <span id="217"> 217</span> <span id="218"> 218</span> <span id="219"> 219</span> <span id="220"> 220</span> <span id="221"> 221</span> <span id="222"> 222</span> <span id="223"> 223</span> <span id="224"> 224</span> <span id="225"> 225</span> <span id="226"> 226</span> <span id="227"> 227</span> <span id="228"> 228</span> <span id="229"> 229</span> <span id="230"> 230</span> <span id="231"> 231</span> <span id="232"> 232</span> <span id="233"> 233</span> <span id="234"> 234</span> <span id="235"> 235</span> <span id="236"> 236</span> <span id="237"> 237</span> <span id="238"> 238</span> <span id="239"> 239</span> <span id="240"> 240</span> <span id="241"> 241</span> <span id="242"> 242</span> <span id="243"> 243</span> <span id="244"> 244</span> <span id="245"> 245</span> <span id="246"> 246</span> <span id="247"> 247</span> <span id="248"> 248</span> <span id="249"> 249</span> <span id="250"> 250</span> <span id="251"> 251</span> <span id="252"> 252</span> <span id="253"> 253</span> <span id="254"> 254</span> <span id="255"> 255</span> <span id="256"> 256</span> <span id="257"> 257</span> <span id="258"> 258</span> <span id="259"> 259</span> <span id="260"> 260</span> <span id="261"> 261</span> <span id="262"> 262</span> <span id="263"> 263</span> <span id="264"> 264</span> <span id="265"> 265</span> <span id="266"> 266</span> <span id="267"> 267</span> <span id="268"> 268</span> <span id="269"> 269</span> <span id="270"> 270</span> <span id="271"> 271</span> <span id="272"> 272</span> <span id="273"> 273</span> <span id="274"> 274</span> <span id="275"> 275</span> <span id="276"> 276</span> <span id="277"> 277</span> <span id="278"> 278</span> <span id="279"> 279</span> <span id="280"> 280</span> <span id="281"> 281</span> <span id="282"> 282</span> <span id="283"> 283</span> <span id="284"> 284</span> <span id="285"> 285</span> <span id="286"> 286</span> <span id="287"> 287</span> <span id="288"> 288</span> <span id="289"> 289</span> <span id="290"> 290</span> <span id="291"> 291</span> <span id="292"> 292</span> <span id="293"> 293</span> <span id="294"> 294</span> <span id="295"> 295</span> <span id="296"> 296</span> <span id="297"> 297</span> <span id="298"> 298</span> <span id="299"> 299</span> <span id="300"> 300</span> <span id="301"> 301</span> <span id="302"> 302</span> <span id="303"> 303</span> <span id="304"> 304</span> <span id="305"> 305</span> <span id="306"> 306</span> <span id="307"> 307</span> <span id="308"> 308</span> <span id="309"> 309</span> <span id="310"> 310</span> <span id="311"> 311</span> <span id="312"> 312</span> <span id="313"> 313</span> <span id="314"> 314</span> <span id="315"> 315</span> <span id="316"> 316</span> <span id="317"> 317</span> <span id="318"> 318</span> <span id="319"> 319</span> <span id="320"> 320</span> <span id="321"> 321</span> <span id="322"> 322</span> <span id="323"> 323</span> <span id="324"> 324</span> <span id="325"> 325</span> <span id="326"> 326</span> <span id="327"> 327</span> <span id="328"> 328</span> <span id="329"> 329</span> <span id="330"> 330</span> <span id="331"> 331</span> <span id="332"> 332</span> <span id="333"> 333</span> <span id="334"> 334</span> <span id="335"> 335</span> <span id="336"> 336</span> <span id="337"> 337</span> <span id="338"> 338</span> <span id="339"> 339</span> <span id="340"> 340</span> <span id="341"> 341</span> <span id="342"> 342</span> <span id="343"> 343</span> <span id="344"> 344</span> <span id="345"> 345</span> <span id="346"> 346</span> <span id="347"> 347</span> <span id="348"> 348</span> <span id="349"> 349</span> <span id="350"> 350</span> <span id="351"> 351</span> <span id="352"> 352</span> <span id="353"> 353</span> <span id="354"> 354</span> <span id="355"> 355</span> <span id="356"> 356</span> <span id="357"> 357</span> <span id="358"> 358</span> <span id="359"> 359</span> <span id="360"> 360</span> <span id="361"> 361</span> <span id="362"> 362</span> <span id="363"> 363</span> <span id="364"> 364</span> <span id="365"> 365</span> <span id="366"> 366</span> <span id="367"> 367</span> <span id="368"> 368</span> <span id="369"> 369</span> <span id="370"> 370</span> <span id="371"> 371</span> <span id="372"> 372</span> <span id="373"> 373</span> <span id="374"> 374</span> <span id="375"> 375</span> <span id="376"> 376</span> <span id="377"> 377</span> <span id="378"> 378</span> <span id="379"> 379</span> <span id="380"> 380</span> <span id="381"> 381</span> <span id="382"> 382</span> <span id="383"> 383</span> <span id="384"> 384</span> <span id="385"> 385</span> <span id="386"> 386</span> <span id="387"> 387</span> <span id="388"> 388</span> <span id="389"> 389</span> <span id="390"> 390</span> <span id="391"> 391</span> <span id="392"> 392</span> <span id="393"> 393</span> <span id="394"> 394</span> <span id="395"> 395</span> <span id="396"> 396</span> <span id="397"> 397</span> <span id="398"> 398</span> <span id="399"> 399</span> <span id="400"> 400</span> <span id="401"> 401</span> <span id="402"> 402</span> <span id="403"> 403</span> <span id="404"> 404</span> <span id="405"> 405</span> <span id="406"> 406</span> <span id="407"> 407</span> <span id="408"> 408</span> <span id="409"> 409</span> <span id="410"> 410</span> <span id="411"> 411</span> <span id="412"> 412</span> <span id="413"> 413</span> <span id="414"> 414</span> <span id="415"> 415</span> <span id="416"> 416</span> <span id="417"> 417</span> <span id="418"> 418</span> <span id="419"> 419</span> <span id="420"> 420</span> <span id="421"> 421</span> <span id="422"> 422</span> <span id="423"> 423</span> <span id="424"> 424</span> <span id="425"> 425</span> <span id="426"> 426</span> <span id="427"> 427</span> <span id="428"> 428</span> <span id="429"> 429</span> <span id="430"> 430</span> <span id="431"> 431</span> <span id="432"> 432</span> <span id="433"> 433</span> <span id="434"> 434</span> <span id="435"> 435</span> <span id="436"> 436</span> <span id="437"> 437</span> <span id="438"> 438</span> <span id="439"> 439</span> <span id="440"> 440</span> <span id="441"> 441</span> <span id="442"> 442</span> <span id="443"> 443</span> <span id="444"> 444</span> <span id="445"> 445</span> <span id="446"> 446</span> <span id="447"> 447</span> <span id="448"> 448</span> <span id="449"> 449</span> <span id="450"> 450</span> <span id="451"> 451</span> <span id="452"> 452</span> <span id="453"> 453</span> <span id="454"> 454</span> <span id="455"> 455</span> <span id="456"> 456</span> <span id="457"> 457</span> <span id="458"> 458</span> <span id="459"> 459</span> <span id="460"> 460</span> <span id="461"> 461</span> <span id="462"> 462</span> <span id="463"> 463</span> <span id="464"> 464</span> <span id="465"> 465</span> <span id="466"> 466</span> <span id="467"> 467</span> <span id="468"> 468</span> <span id="469"> 469</span> <span id="470"> 470</span> <span id="471"> 471</span> <span id="472"> 472</span> <span id="473"> 473</span> <span id="474"> 474</span> <span id="475"> 475</span> <span id="476"> 476</span> <span id="477"> 477</span> <span id="478"> 478</span> <span id="479"> 479</span> <span id="480"> 480</span> <span id="481"> 481</span> <span id="482"> 482</span> <span id="483"> 483</span> <span id="484"> 484</span> <span id="485"> 485</span> <span id="486"> 486</span> <span id="487"> 487</span> <span id="488"> 488</span> <span id="489"> 489</span> <span id="490"> 490</span> <span id="491"> 491</span> <span id="492"> 492</span> <span id="493"> 493</span> <span id="494"> 494</span> <span id="495"> 495</span> <span id="496"> 496</span> <span id="497"> 497</span> <span id="498"> 498</span> <span id="499"> 499</span> <span id="500"> 500</span> <span id="501"> 501</span> <span id="502"> 502</span> <span id="503"> 503</span> <span id="504"> 504</span> <span id="505"> 505</span> <span id="506"> 506</span> <span id="507"> 507</span> <span id="508"> 508</span> <span id="509"> 509</span> <span id="510"> 510</span> <span id="511"> 511</span> <span id="512"> 512</span> <span id="513"> 513</span> <span id="514"> 514</span> <span id="515"> 515</span> <span id="516"> 516</span> <span id="517"> 517</span> <span id="518"> 518</span> <span id="519"> 519</span> <span id="520"> 520</span> <span id="521"> 521</span> <span id="522"> 522</span> <span id="523"> 523</span> <span id="524"> 524</span> <span id="525"> 525</span> <span id="526"> 526</span> <span id="527"> 527</span> <span id="528"> 528</span> <span id="529"> 529</span> <span id="530"> 530</span> <span id="531"> 531</span> <span id="532"> 532</span> <span id="533"> 533</span> <span id="534"> 534</span> <span id="535"> 535</span> <span id="536"> 536</span> <span id="537"> 537</span> <span id="538"> 538</span> <span id="539"> 539</span> <span id="540"> 540</span> <span id="541"> 541</span> <span id="542"> 542</span> <span id="543"> 543</span> <span id="544"> 544</span> <span id="545"> 545</span> <span id="546"> 546</span> <span id="547"> 547</span> <span id="548"> 548</span> <span id="549"> 549</span> <span id="550"> 550</span> <span id="551"> 551</span> <span id="552"> 552</span> <span id="553"> 553</span> <span id="554"> 554</span> <span id="555"> 555</span> <span id="556"> 556</span> <span id="557"> 557</span> <span id="558"> 558</span> <span id="559"> 559</span> <span id="560"> 560</span> <span id="561"> 561</span> <span id="562"> 562</span> <span id="563"> 563</span> <span id="564"> 564</span> <span id="565"> 565</span> <span id="566"> 566</span> <span id="567"> 567</span> <span id="568"> 568</span> <span id="569"> 569</span> <span id="570"> 570</span> <span id="571"> 571</span> <span id="572"> 572</span> <span id="573"> 573</span> <span id="574"> 574</span> <span id="575"> 575</span> <span id="576"> 576</span> <span id="577"> 577</span> <span id="578"> 578</span> <span id="579"> 579</span> <span id="580"> 580</span> <span id="581"> 581</span> <span id="582"> 582</span> <span id="583"> 583</span> <span id="584"> 584</span> <span id="585"> 585</span> <span id="586"> 586</span> <span id="587"> 587</span> <span id="588"> 588</span> <span id="589"> 589</span> <span id="590"> 590</span> <span id="591"> 591</span> <span id="592"> 592</span> <span id="593"> 593</span> <span id="594"> 594</span> <span id="595"> 595</span> <span id="596"> 596</span> <span id="597"> 597</span> <span id="598"> 598</span> <span id="599"> 599</span> <span id="600"> 600</span> <span id="601"> 601</span> <span id="602"> 602</span> <span id="603"> 603</span> <span id="604"> 604</span> <span id="605"> 605</span> <span id="606"> 606</span> <span id="607"> 607</span> <span id="608"> 608</span> <span id="609"> 609</span> <span id="610"> 610</span> <span id="611"> 611</span> <span id="612"> 612</span> <span id="613"> 613</span> <span id="614"> 614</span> <span id="615"> 615</span> <span id="616"> 616</span> <span id="617"> 617</span> <span id="618"> 618</span> <span id="619"> 619</span> <span id="620"> 620</span> <span id="621"> 621</span> <span id="622"> 622</span> <span id="623"> 623</span> <span id="624"> 624</span> <span id="625"> 625</span> <span id="626"> 626</span> <span id="627"> 627</span> <span id="628"> 628</span> <span id="629"> 629</span> <span id="630"> 630</span> <span id="631"> 631</span> <span id="632"> 632</span> <span id="633"> 633</span> <span id="634"> 634</span> <span id="635"> 635</span> <span id="636"> 636</span> <span id="637"> 637</span> <span id="638"> 638</span> <span id="639"> 639</span> <span id="640"> 640</span> <span id="641"> 641</span> <span id="642"> 642</span> <span id="643"> 643</span> <span id="644"> 644</span> <span id="645"> 645</span> <span id="646"> 646</span> <span id="647"> 647</span> <span id="648"> 648</span> <span id="649"> 649</span> <span id="650"> 650</span> <span id="651"> 651</span> <span id="652"> 652</span> <span id="653"> 653</span> <span id="654"> 654</span> <span id="655"> 655</span> <span id="656"> 656</span> <span id="657"> 657</span> <span id="658"> 658</span> <span id="659"> 659</span> <span id="660"> 660</span> <span id="661"> 661</span> <span id="662"> 662</span> <span id="663"> 663</span> <span id="664"> 664</span> <span id="665"> 665</span> <span id="666"> 666</span> <span id="667"> 667</span> <span id="668"> 668</span> <span id="669"> 669</span> <span id="670"> 670</span> <span id="671"> 671</span> <span id="672"> 672</span> <span id="673"> 673</span> <span id="674"> 674</span> <span id="675"> 675</span> <span id="676"> 676</span> <span id="677"> 677</span> <span id="678"> 678</span> <span id="679"> 679</span> <span id="680"> 680</span> <span id="681"> 681</span> <span id="682"> 682</span> <span id="683"> 683</span> <span id="684"> 684</span> <span id="685"> 685</span> <span id="686"> 686</span> <span id="687"> 687</span> <span id="688"> 688</span> <span id="689"> 689</span> <span id="690"> 690</span> <span id="691"> 691</span> <span id="692"> 692</span> <span id="693"> 693</span> <span id="694"> 694</span> <span id="695"> 695</span> <span id="696"> 696</span> <span id="697"> 697</span> <span id="698"> 698</span> <span id="699"> 699</span> <span id="700"> 700</span> <span id="701"> 701</span> <span id="702"> 702</span> <span id="703"> 703</span> <span id="704"> 704</span> <span id="705"> 705</span> <span id="706"> 706</span> <span id="707"> 707</span> <span id="708"> 708</span> <span id="709"> 709</span> <span id="710"> 710</span> <span id="711"> 711</span> <span id="712"> 712</span> <span id="713"> 713</span> <span id="714"> 714</span> <span id="715"> 715</span> <span id="716"> 716</span> <span id="717"> 717</span> <span id="718"> 718</span> <span id="719"> 719</span> <span id="720"> 720</span> <span id="721"> 721</span> <span id="722"> 722</span> <span id="723"> 723</span> <span id="724"> 724</span> <span id="725"> 725</span> <span id="726"> 726</span> <span id="727"> 727</span> <span id="728"> 728</span> <span id="729"> 729</span> <span id="730"> 730</span> <span id="731"> 731</span> <span id="732"> 732</span> <span id="733"> 733</span> <span id="734"> 734</span> <span id="735"> 735</span> <span id="736"> 736</span> <span id="737"> 737</span> <span id="738"> 738</span> <span id="739"> 739</span> <span id="740"> 740</span> <span id="741"> 741</span> <span id="742"> 742</span> <span id="743"> 743</span> <span id="744"> 744</span> <span id="745"> 745</span> <span id="746"> 746</span> <span id="747"> 747</span> <span id="748"> 748</span> <span id="749"> 749</span> <span id="750"> 750</span> <span id="751"> 751</span> <span id="752"> 752</span> <span id="753"> 753</span> <span id="754"> 754</span> <span id="755"> 755</span> <span id="756"> 756</span> <span id="757"> 757</span> <span id="758"> 758</span> <span id="759"> 759</span> <span id="760"> 760</span> <span id="761"> 761</span> <span id="762"> 762</span> <span id="763"> 763</span> <span id="764"> 764</span> <span id="765"> 765</span> <span id="766"> 766</span> <span id="767"> 767</span> <span id="768"> 768</span> <span id="769"> 769</span> <span id="770"> 770</span> <span id="771"> 771</span> <span id="772"> 772</span> <span id="773"> 773</span> <span id="774"> 774</span> <span id="775"> 775</span> <span id="776"> 776</span> <span id="777"> 777</span> <span id="778"> 778</span> <span id="779"> 779</span> <span id="780"> 780</span> <span id="781"> 781</span> <span id="782"> 782</span> <span id="783"> 783</span> <span id="784"> 784</span> <span id="785"> 785</span> <span id="786"> 786</span> <span id="787"> 787</span> <span id="788"> 788</span> <span id="789"> 789</span> <span id="790"> 790</span> <span id="791"> 791</span> <span id="792"> 792</span> <span id="793"> 793</span> <span id="794"> 794</span> <span id="795"> 795</span> <span id="796"> 796</span> <span id="797"> 797</span> <span id="798"> 798</span> <span id="799"> 799</span> <span id="800"> 800</span> <span id="801"> 801</span> <span id="802"> 802</span> <span id="803"> 803</span> <span id="804"> 804</span> <span id="805"> 805</span> <span id="806"> 806</span> <span id="807"> 807</span> <span id="808"> 808</span> <span id="809"> 809</span> <span id="810"> 810</span> <span id="811"> 811</span> <span id="812"> 812</span> <span id="813"> 813</span> <span id="814"> 814</span> <span id="815"> 815</span> <span id="816"> 816</span> <span id="817"> 817</span> <span id="818"> 818</span> <span id="819"> 819</span> <span id="820"> 820</span> <span id="821"> 821</span> <span id="822"> 822</span> <span id="823"> 823</span> <span id="824"> 824</span> <span id="825"> 825</span> <span id="826"> 826</span> <span id="827"> 827</span> <span id="828"> 828</span> <span id="829"> 829</span> <span id="830"> 830</span> <span id="831"> 831</span> <span id="832"> 832</span> <span id="833"> 833</span> <span id="834"> 834</span> <span id="835"> 835</span> <span id="836"> 836</span> <span id="837"> 837</span> <span id="838"> 838</span> <span id="839"> 839</span> <span id="840"> 840</span> <span id="841"> 841</span> <span id="842"> 842</span> <span id="843"> 843</span> <span id="844"> 844</span> <span id="845"> 845</span> <span id="846"> 846</span> <span id="847"> 847</span> <span id="848"> 848</span> <span id="849"> 849</span> <span id="850"> 850</span> <span id="851"> 851</span> <span id="852"> 852</span> <span id="853"> 853</span> <span id="854"> 854</span> <span id="855"> 855</span> <span id="856"> 856</span> <span id="857"> 857</span> <span id="858"> 858</span> <span id="859"> 859</span> <span id="860"> 860</span> <span id="861"> 861</span> <span id="862"> 862</span> <span id="863"> 863</span> <span id="864"> 864</span> <span id="865"> 865</span> <span id="866"> 866</span> <span id="867"> 867</span> <span id="868"> 868</span> <span id="869"> 869</span> <span id="870"> 870</span> <span id="871"> 871</span> <span id="872"> 872</span> <span id="873"> 873</span> <span id="874"> 874</span> <span id="875"> 875</span> <span id="876"> 876</span> <span id="877"> 877</span> <span id="878"> 878</span> <span id="879"> 879</span> <span id="880"> 880</span> <span id="881"> 881</span> <span id="882"> 882</span> <span id="883"> 883</span> <span id="884"> 884</span> <span id="885"> 885</span> <span id="886"> 886</span> <span id="887"> 887</span> <span id="888"> 888</span> <span id="889"> 889</span> <span id="890"> 890</span> <span id="891"> 891</span> <span id="892"> 892</span> <span id="893"> 893</span> <span id="894"> 894</span> <span id="895"> 895</span> <span id="896"> 896</span> <span id="897"> 897</span> <span id="898"> 898</span> <span id="899"> 899</span> <span id="900"> 900</span> <span id="901"> 901</span> <span id="902"> 902</span> <span id="903"> 903</span> <span id="904"> 904</span> <span id="905"> 905</span> <span id="906"> 906</span> <span id="907"> 907</span> <span id="908"> 908</span> <span id="909"> 909</span> <span id="910"> 910</span> <span id="911"> 911</span> <span id="912"> 912</span> <span id="913"> 913</span> <span id="914"> 914</span> <span id="915"> 915</span> <span id="916"> 916</span> <span id="917"> 917</span> <span id="918"> 918</span> <span id="919"> 919</span> <span id="920"> 920</span> <span id="921"> 921</span> <span id="922"> 922</span> <span id="923"> 923</span> <span id="924"> 924</span> <span id="925"> 925</span> <span id="926"> 926</span> <span id="927"> 927</span> <span id="928"> 928</span> <span id="929"> 929</span> <span id="930"> 930</span> <span id="931"> 931</span> <span id="932"> 932</span> <span id="933"> 933</span> <span id="934"> 934</span> <span id="935"> 935</span> <span id="936"> 936</span> <span id="937"> 937</span> <span id="938"> 938</span> <span id="939"> 939</span> <span id="940"> 940</span> <span id="941"> 941</span> <span id="942"> 942</span> <span id="943"> 943</span> <span id="944"> 944</span> <span id="945"> 945</span> <span id="946"> 946</span> <span id="947"> 947</span> <span id="948"> 948</span> <span id="949"> 949</span> <span id="950"> 950</span> <span id="951"> 951</span> <span id="952"> 952</span> <span id="953"> 953</span> <span id="954"> 954</span> <span id="955"> 955</span> <span id="956"> 956</span> <span id="957"> 957</span> <span id="958"> 958</span> <span id="959"> 959</span> <span id="960"> 960</span> <span id="961"> 961</span> <span id="962"> 962</span> <span id="963"> 963</span> <span id="964"> 964</span> <span id="965"> 965</span> <span id="966"> 966</span> <span id="967"> 967</span> <span id="968"> 968</span> <span id="969"> 969</span> <span id="970"> 970</span> <span id="971"> 971</span> <span id="972"> 972</span> <span id="973"> 973</span> <span id="974"> 974</span> <span id="975"> 975</span> <span id="976"> 976</span> <span id="977"> 977</span> <span id="978"> 978</span> <span id="979"> 979</span> <span id="980"> 980</span> <span id="981"> 981</span> <span id="982"> 982</span> <span id="983"> 983</span> <span id="984"> 984</span> <span id="985"> 985</span> <span id="986"> 986</span> <span id="987"> 987</span> <span id="988"> 988</span> <span id="989"> 989</span> <span id="990"> 990</span> <span id="991"> 991</span> <span id="992"> 992</span> <span id="993"> 993</span> <span id="994"> 994</span> <span id="995"> 995</span> <span id="996"> 996</span> <span id="997"> 997</span> <span id="998"> 998</span> <span id="999"> 999</span> <span id="1000">1000</span> <span id="1001">1001</span> <span id="1002">1002</span> <span id="1003">1003</span> <span id="1004">1004</span> <span id="1005">1005</span> <span id="1006">1006</span> <span id="1007">1007</span> <span id="1008">1008</span> <span id="1009">1009</span> <span id="1010">1010</span> <span id="1011">1011</span> <span id="1012">1012</span> <span id="1013">1013</span> <span id="1014">1014</span> <span id="1015">1015</span> <span id="1016">1016</span> <span id="1017">1017</span> <span id="1018">1018</span> <span id="1019">1019</span> <span id="1020">1020</span> <span id="1021">1021</span> <span id="1022">1022</span> <span id="1023">1023</span> <span id="1024">1024</span> <span id="1025">1025</span> <span id="1026">1026</span> <span id="1027">1027</span> <span id="1028">1028</span> <span id="1029">1029</span> <span id="1030">1030</span> <span id="1031">1031</span> <span id="1032">1032</span> <span id="1033">1033</span> <span id="1034">1034</span> <span id="1035">1035</span> <span id="1036">1036</span> <span id="1037">1037</span> <span id="1038">1038</span> <span id="1039">1039</span> <span id="1040">1040</span> <span id="1041">1041</span> <span id="1042">1042</span> <span id="1043">1043</span> <span id="1044">1044</span> <span id="1045">1045</span> <span id="1046">1046</span> <span id="1047">1047</span> <span id="1048">1048</span> <span id="1049">1049</span> <span id="1050">1050</span> <span id="1051">1051</span> <span id="1052">1052</span> <span id="1053">1053</span> <span id="1054">1054</span> <span id="1055">1055</span> <span id="1056">1056</span> <span id="1057">1057</span> <span id="1058">1058</span> <span id="1059">1059</span> <span id="1060">1060</span> <span id="1061">1061</span> <span id="1062">1062</span> <span id="1063">1063</span> <span id="1064">1064</span> <span id="1065">1065</span> <span id="1066">1066</span> <span id="1067">1067</span> <span id="1068">1068</span> <span id="1069">1069</span> <span id="1070">1070</span> <span id="1071">1071</span> <span id="1072">1072</span> <span id="1073">1073</span> <span id="1074">1074</span> <span id="1075">1075</span> <span id="1076">1076</span> <span id="1077">1077</span> <span id="1078">1078</span> <span id="1079">1079</span> <span id="1080">1080</span> <span id="1081">1081</span> <span id="1082">1082</span> <span id="1083">1083</span> <span id="1084">1084</span> <span id="1085">1085</span> <span id="1086">1086</span> <span id="1087">1087</span> <span id="1088">1088</span> <span id="1089">1089</span> <span id="1090">1090</span> <span id="1091">1091</span> <span id="1092">1092</span> <span id="1093">1093</span> <span id="1094">1094</span> <span id="1095">1095</span> <span id="1096">1096</span> <span id="1097">1097</span> <span id="1098">1098</span> <span id="1099">1099</span> <span id="1100">1100</span> <span id="1101">1101</span> <span id="1102">1102</span> <span id="1103">1103</span> <span id="1104">1104</span> <span id="1105">1105</span> <span id="1106">1106</span> <span id="1107">1107</span> <span id="1108">1108</span> <span id="1109">1109</span> <span id="1110">1110</span> <span id="1111">1111</span> <span id="1112">1112</span> <span id="1113">1113</span> <span id="1114">1114</span> <span id="1115">1115</span> <span id="1116">1116</span> <span id="1117">1117</span> <span id="1118">1118</span> <span id="1119">1119</span> <span id="1120">1120</span> <span id="1121">1121</span> <span id="1122">1122</span> <span id="1123">1123</span> <span id="1124">1124</span> <span id="1125">1125</span> <span id="1126">1126</span> <span id="1127">1127</span> <span id="1128">1128</span> <span id="1129">1129</span> <span id="1130">1130</span> <span id="1131">1131</span> <span id="1132">1132</span> <span id="1133">1133</span> <span id="1134">1134</span> <span id="1135">1135</span> <span id="1136">1136</span> <span id="1137">1137</span> <span id="1138">1138</span> <span id="1139">1139</span> <span id="1140">1140</span> <span id="1141">1141</span> <span id="1142">1142</span> <span id="1143">1143</span> <span id="1144">1144</span> <span id="1145">1145</span> <span id="1146">1146</span> <span id="1147">1147</span> <span id="1148">1148</span> <span id="1149">1149</span> <span id="1150">1150</span> <span id="1151">1151</span> <span id="1152">1152</span> <span id="1153">1153</span> <span id="1154">1154</span> <span id="1155">1155</span> <span id="1156">1156</span> <span id="1157">1157</span> <span id="1158">1158</span> <span id="1159">1159</span> <span id="1160">1160</span> <span id="1161">1161</span> <span id="1162">1162</span> <span id="1163">1163</span> </pre><pre class="rust "> <span class="comment">// Copyright 2015 The Rust Project Developers. See the COPYRIGHT</span> <span class="comment">// file at the top-level directory of this distribution and at</span> <span class="comment">// http://rust-lang.org/COPYRIGHT.</span> <span class="comment">//</span> <span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> <span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span> <span class="comment">// option. This file may not be copied, modified, or distributed</span> <span class="comment">// except according to those terms.</span> <span class="kw">use</span> <span class="ident">fmt</span>; <span class="kw">use</span> <span class="ident">io</span>::{<span class="self">self</span>, <span class="ident">Error</span>, <span class="ident">ErrorKind</span>}; <span class="kw">use</span> <span class="ident">net</span>::{<span class="ident">ToSocketAddrs</span>, <span class="ident">SocketAddr</span>, <span class="ident">Ipv4Addr</span>, <span class="ident">Ipv6Addr</span>}; <span class="kw">use</span> <span class="ident">sys_common</span>::<span class="ident">net</span> <span class="kw">as</span> <span class="ident">net_imp</span>; <span class="kw">use</span> <span class="ident">sys_common</span>::{<span class="ident">AsInner</span>, <span class="ident">FromInner</span>, <span class="ident">IntoInner</span>}; <span class="kw">use</span> <span class="ident">time</span>::<span class="ident">Duration</span>; <span class="doccomment">/// A UDP socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// After creating a `UdpSocket` by [`bind`]ing it to a socket address, data can be</span> <span class="doccomment">/// [sent to] and [received from] any other socket address.</span> <span class="doccomment">///</span> <span class="doccomment">/// Although UDP is a connectionless protocol, this implementation provides an interface</span> <span class="doccomment">/// to set an address where data should be sent and received from. After setting a remote</span> <span class="doccomment">/// address with [`connect`], data can be sent to and received from that address with</span> <span class="doccomment">/// [`send`] and [`recv`].</span> <span class="doccomment">///</span> <span class="doccomment">/// As stated in the User Datagram Protocol's specification in [IETF RFC 768], UDP is</span> <span class="doccomment">/// an unordered, unreliable protocol; refer to [`TcpListener`] and [`TcpStream`] for TCP</span> <span class="doccomment">/// primitives.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`bind`]: #method.bind</span> <span class="doccomment">/// [`connect`]: #method.connect</span> <span class="doccomment">/// [IETF RFC 768]: https://tools.ietf.org/html/rfc768</span> <span class="doccomment">/// [`recv`]: #method.recv</span> <span class="doccomment">/// [received from]: #method.recv_from</span> <span class="doccomment">/// [`send`]: #method.send</span> <span class="doccomment">/// [sent to]: #method.send_to</span> <span class="doccomment">/// [`TcpListener`]: ../../std/net/struct.TcpListener.html</span> <span class="doccomment">/// [`TcpStream`]: ../../std/net/struct.TcpStream.html</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// fn main() -> std::io::Result<()> {</span> <span class="doccomment">/// {</span> <span class="doccomment">/// let mut socket = UdpSocket::bind("127.0.0.1:34254")?;</span> <span class="doccomment">///</span> <span class="doccomment">/// // Receives a single datagram message on the socket. If `buf` is too small to hold</span> <span class="doccomment">/// // the message, it will be cut off.</span> <span class="doccomment">/// let mut buf = [0; 10];</span> <span class="doccomment">/// let (amt, src) = socket.recv_from(&mut buf)?;</span> <span class="doccomment">///</span> <span class="doccomment">/// // Redeclare `buf` as slice of the received data and send reverse data back to origin.</span> <span class="doccomment">/// let buf = &mut buf[..amt];</span> <span class="doccomment">/// buf.reverse();</span> <span class="doccomment">/// socket.send_to(buf, &src)?;</span> <span class="doccomment">/// } // the socket is closed here</span> <span class="doccomment">/// Ok(())</span> <span class="doccomment">/// }</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">UdpSocket</span>(<span class="ident">net_imp</span>::<span class="ident">UdpSocket</span>); <span class="kw">impl</span> <span class="ident">UdpSocket</span> { <span class="doccomment">/// Creates a UDP socket from the given address.</span> <span class="doccomment">///</span> <span class="doccomment">/// The address type can be any implementor of [`ToSocketAddrs`] trait. See</span> <span class="doccomment">/// its documentation for concrete examples.</span> <span class="doccomment">///</span> <span class="doccomment">/// If `addr` yields multiple addresses, `bind` will be attempted with</span> <span class="doccomment">/// each of the addresses until one succeeds and returns the socket. If none</span> <span class="doccomment">/// of the addresses succeed in creating a socket, the error returned from</span> <span class="doccomment">/// the last attempt (the last address) is returned.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`ToSocketAddrs`]: ../../std/net/trait.ToSocketAddrs.html</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// Create a UDP socket bound to `127.0.0.1:3400`:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:3400").expect("couldn't bind to address");</span> <span class="doccomment">/// ```</span> <span class="doccomment">///</span> <span class="doccomment">/// Create a UDP socket bound to `127.0.0.1:3400`. If the socket cannot be</span> <span class="doccomment">/// bound to that address, create a UDP socket bound to `127.0.0.1:3401`:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::{SocketAddr, UdpSocket};</span> <span class="doccomment">///</span> <span class="doccomment">/// let addrs = [</span> <span class="doccomment">/// SocketAddr::from(([127, 0, 0, 1], 3400)),</span> <span class="doccomment">/// SocketAddr::from(([127, 0, 0, 1], 3401)),</span> <span class="doccomment">/// ];</span> <span class="doccomment">/// let socket = UdpSocket::bind(&addrs[..]).expect("couldn't bind to address");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">bind</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToSocketAddrs</span><span class="op">></span>(<span class="ident">addr</span>: <span class="ident">A</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">UdpSocket</span><span class="op">></span> { <span class="kw">super</span>::<span class="ident">each_addr</span>(<span class="ident">addr</span>, <span class="ident">net_imp</span>::<span class="ident">UdpSocket</span>::<span class="ident">bind</span>).<span class="ident">map</span>(<span class="ident">UdpSocket</span>) } <span class="doccomment">/// Receives a single datagram message on the socket. On success, returns the number</span> <span class="doccomment">/// of bytes read and the origin.</span> <span class="doccomment">///</span> <span class="doccomment">/// The function must be called with valid byte array `buf` of sufficient size to</span> <span class="doccomment">/// hold the message bytes. If a message is too long to fit in the supplied buffer,</span> <span class="doccomment">/// excess bytes may be discarded.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// let mut buf = [0; 10];</span> <span class="doccomment">/// let (number_of_bytes, src_addr) = socket.recv_from(&mut buf)</span> <span class="doccomment">/// .expect("Didn't receive data");</span> <span class="doccomment">/// let filled_buf = &mut buf[..number_of_bytes];</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="ident">SocketAddr</span>)<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">recv_from</span>(<span class="ident">buf</span>) } <span class="doccomment">/// Receives a single datagram message on the socket, without removing it from the</span> <span class="doccomment">/// queue. On success, returns the number of bytes read and the origin.</span> <span class="doccomment">///</span> <span class="doccomment">/// The function must be called with valid byte array `buf` of sufficient size to</span> <span class="doccomment">/// hold the message bytes. If a message is too long to fit in the supplied buffer,</span> <span class="doccomment">/// excess bytes may be discarded.</span> <span class="doccomment">///</span> <span class="doccomment">/// Successive calls return the same data. This is accomplished by passing</span> <span class="doccomment">/// `MSG_PEEK` as a flag to the underlying `recvfrom` system call.</span> <span class="doccomment">///</span> <span class="doccomment">/// Do not use this function to implement busy waiting, instead use `libc::poll` to</span> <span class="doccomment">/// synchronize IO events on one or more sockets.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// let mut buf = [0; 10];</span> <span class="doccomment">/// let (number_of_bytes, src_addr) = socket.peek_from(&mut buf)</span> <span class="doccomment">/// .expect("Didn't receive data");</span> <span class="doccomment">/// let filled_buf = &mut buf[..number_of_bytes];</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"peek"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.18.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">peek_from</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>(<span class="ident">usize</span>, <span class="ident">SocketAddr</span>)<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">peek_from</span>(<span class="ident">buf</span>) } <span class="doccomment">/// Sends data on the socket to the given address. On success, returns the</span> <span class="doccomment">/// number of bytes written.</span> <span class="doccomment">///</span> <span class="doccomment">/// Address type can be any implementor of [`ToSocketAddrs`] trait. See its</span> <span class="doccomment">/// documentation for concrete examples.</span> <span class="doccomment">///</span> <span class="doccomment">/// It is possible for `addr` to yield multiple addresses, but `send_to`</span> <span class="doccomment">/// will only send data to the first address yielded by `addr`.</span> <span class="doccomment">///</span> <span class="doccomment">/// This will return an error when the IP version of the local socket</span> <span class="doccomment">/// does not match that returned from [`ToSocketAddrs`].</span> <span class="doccomment">///</span> <span class="doccomment">/// See <https://github.com/rust-lang/rust/issues/34202> for more details.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`ToSocketAddrs`]: ../../std/net/trait.ToSocketAddrs.html</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.send_to(&[0; 10], "127.0.0.1:4242").expect("couldn't send data");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">send_to</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToSocketAddrs</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="ident">addr</span>: <span class="ident">A</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { <span class="kw">match</span> <span class="ident">addr</span>.<span class="ident">to_socket_addrs</span>()<span class="question-mark">?</span>.<span class="ident">next</span>() { <span class="prelude-val">Some</span>(<span class="ident">addr</span>) <span class="op">=></span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">send_to</span>(<span class="ident">buf</span>, <span class="kw-2">&</span><span class="ident">addr</span>), <span class="prelude-val">None</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">ErrorKind</span>::<span class="ident">InvalidInput</span>, <span class="string">"no addresses to send data to"</span>)), } } <span class="doccomment">/// Returns the socket address that this socket was created from.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, UdpSocket};</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// assert_eq!(socket.local_addr().unwrap(),</span> <span class="doccomment">/// SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 34254)));</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">local_addr</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SocketAddr</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">socket_addr</span>() } <span class="doccomment">/// Creates a new independently owned handle to the underlying socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// The returned `UdpSocket` is a reference to the same socket that this</span> <span class="doccomment">/// object references. Both handles will read and write the same port, and</span> <span class="doccomment">/// options set on one socket will be propagated to the other.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// let socket_clone = socket.try_clone().expect("couldn't clone the socket");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">try_clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">UdpSocket</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">duplicate</span>().<span class="ident">map</span>(<span class="ident">UdpSocket</span>) } <span class="doccomment">/// Sets the read timeout to the timeout specified.</span> <span class="doccomment">///</span> <span class="doccomment">/// If the value specified is [`None`], then [`read`] calls will block</span> <span class="doccomment">/// indefinitely. An [`Err`] is returned if the zero [`Duration`] is</span> <span class="doccomment">/// passed to this method.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Platform-specific behavior</span> <span class="doccomment">///</span> <span class="doccomment">/// Platforms may return a different error code whenever a read times out as</span> <span class="doccomment">/// a result of setting this option. For example Unix typically returns an</span> <span class="doccomment">/// error of the kind [`WouldBlock`], but Windows may return [`TimedOut`].</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">/// [`Err`]: ../../std/result/enum.Result.html#variant.Err</span> <span class="doccomment">/// [`read`]: ../../std/io/trait.Read.html#tymethod.read</span> <span class="doccomment">/// [`Duration`]: ../../std/time/struct.Duration.html</span> <span class="doccomment">/// [`WouldBlock`]: ../../std/io/enum.ErrorKind.html#variant.WouldBlock</span> <span class="doccomment">/// [`TimedOut`]: ../../std/io/enum.ErrorKind.html#variant.TimedOut</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_read_timeout(None).expect("set_read_timeout call failed");</span> <span class="doccomment">/// ```</span> <span class="doccomment">///</span> <span class="doccomment">/// An [`Err`] is returned if the zero [`Duration`] is passed to this</span> <span class="doccomment">/// method:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::io;</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").unwrap();</span> <span class="doccomment">/// let result = socket.set_read_timeout(Some(Duration::new(0, 0)));</span> <span class="doccomment">/// let err = result.unwrap_err();</span> <span class="doccomment">/// assert_eq!(err.kind(), io::ErrorKind::InvalidInput)</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"socket_timeout"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.4.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_read_timeout</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">dur</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_read_timeout</span>(<span class="ident">dur</span>) } <span class="doccomment">/// Sets the write timeout to the timeout specified.</span> <span class="doccomment">///</span> <span class="doccomment">/// If the value specified is [`None`], then [`write`] calls will block</span> <span class="doccomment">/// indefinitely. An [`Err`] is returned if the zero [`Duration`] is</span> <span class="doccomment">/// passed to this method.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Platform-specific behavior</span> <span class="doccomment">///</span> <span class="doccomment">/// Platforms may return a different error code whenever a write times out</span> <span class="doccomment">/// as a result of setting this option. For example Unix typically returns</span> <span class="doccomment">/// an error of the kind [`WouldBlock`], but Windows may return [`TimedOut`].</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">/// [`Err`]: ../../std/result/enum.Result.html#variant.Err</span> <span class="doccomment">/// [`write`]: ../../std/io/trait.Write.html#tymethod.write</span> <span class="doccomment">/// [`Duration`]: ../../std/time/struct.Duration.html</span> <span class="doccomment">/// [`WouldBlock`]: ../../std/io/enum.ErrorKind.html#variant.WouldBlock</span> <span class="doccomment">/// [`TimedOut`]: ../../std/io/enum.ErrorKind.html#variant.TimedOut</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_write_timeout(None).expect("set_write_timeout call failed");</span> <span class="doccomment">/// ```</span> <span class="doccomment">///</span> <span class="doccomment">/// An [`Err`] is returned if the zero [`Duration`] is passed to this</span> <span class="doccomment">/// method:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::io;</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").unwrap();</span> <span class="doccomment">/// let result = socket.set_write_timeout(Some(Duration::new(0, 0)));</span> <span class="doccomment">/// let err = result.unwrap_err();</span> <span class="doccomment">/// assert_eq!(err.kind(), io::ErrorKind::InvalidInput)</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"socket_timeout"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.4.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_write_timeout</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">dur</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_write_timeout</span>(<span class="ident">dur</span>) } <span class="doccomment">/// Returns the read timeout of this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// If the timeout is [`None`], then [`read`] calls will block indefinitely.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">/// [`read`]: ../../std/io/trait.Read.html#tymethod.read</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_read_timeout(None).expect("set_read_timeout call failed");</span> <span class="doccomment">/// assert_eq!(socket.read_timeout().unwrap(), None);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"socket_timeout"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.4.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">read_timeout</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">>></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">read_timeout</span>() } <span class="doccomment">/// Returns the write timeout of this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// If the timeout is [`None`], then [`write`] calls will block indefinitely.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">/// [`write`]: ../../std/io/trait.Write.html#tymethod.write</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_write_timeout(None).expect("set_write_timeout call failed");</span> <span class="doccomment">/// assert_eq!(socket.write_timeout().unwrap(), None);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"socket_timeout"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.4.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write_timeout</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">>></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">write_timeout</span>() } <span class="doccomment">/// Sets the value of the `SO_BROADCAST` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// When enabled, this socket is allowed to send packets to a broadcast</span> <span class="doccomment">/// address.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_broadcast(false).expect("set_broadcast call failed");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_broadcast</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">broadcast</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_broadcast</span>(<span class="ident">broadcast</span>) } <span class="doccomment">/// Gets the value of the `SO_BROADCAST` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// For more information about this option, see</span> <span class="doccomment">/// [`set_broadcast`][link].</span> <span class="doccomment">///</span> <span class="doccomment">/// [link]: #method.set_broadcast</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_broadcast(false).expect("set_broadcast call failed");</span> <span class="doccomment">/// assert_eq!(socket.broadcast().unwrap(), false);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">broadcast</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">broadcast</span>() } <span class="doccomment">/// Sets the value of the `IP_MULTICAST_LOOP` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// If enabled, multicast packets will be looped back to the local socket.</span> <span class="doccomment">/// Note that this may not have any affect on IPv6 sockets.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_multicast_loop_v4(false).expect("set_multicast_loop_v4 call failed");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_multicast_loop_v4</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">multicast_loop_v4</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_multicast_loop_v4</span>(<span class="ident">multicast_loop_v4</span>) } <span class="doccomment">/// Gets the value of the `IP_MULTICAST_LOOP` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// For more information about this option, see</span> <span class="doccomment">/// [`set_multicast_loop_v4`][link].</span> <span class="doccomment">///</span> <span class="doccomment">/// [link]: #method.set_multicast_loop_v4</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_multicast_loop_v4(false).expect("set_multicast_loop_v4 call failed");</span> <span class="doccomment">/// assert_eq!(socket.multicast_loop_v4().unwrap(), false);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">multicast_loop_v4</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">multicast_loop_v4</span>() } <span class="doccomment">/// Sets the value of the `IP_MULTICAST_TTL` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// Indicates the time-to-live value of outgoing multicast packets for</span> <span class="doccomment">/// this socket. The default value is 1 which means that multicast packets</span> <span class="doccomment">/// don't leave the local network unless explicitly requested.</span> <span class="doccomment">///</span> <span class="doccomment">/// Note that this may not have any affect on IPv6 sockets.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_multicast_ttl_v4(42).expect("set_multicast_ttl_v4 call failed");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_multicast_ttl_v4</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">multicast_ttl_v4</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_multicast_ttl_v4</span>(<span class="ident">multicast_ttl_v4</span>) } <span class="doccomment">/// Gets the value of the `IP_MULTICAST_TTL` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// For more information about this option, see</span> <span class="doccomment">/// [`set_multicast_ttl_v4`][link].</span> <span class="doccomment">///</span> <span class="doccomment">/// [link]: #method.set_multicast_ttl_v4</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_multicast_ttl_v4(42).expect("set_multicast_ttl_v4 call failed");</span> <span class="doccomment">/// assert_eq!(socket.multicast_ttl_v4().unwrap(), 42);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">multicast_ttl_v4</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">multicast_ttl_v4</span>() } <span class="doccomment">/// Sets the value of the `IPV6_MULTICAST_LOOP` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// Controls whether this socket sees the multicast packets it sends itself.</span> <span class="doccomment">/// Note that this may not have any affect on IPv4 sockets.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_multicast_loop_v6(false).expect("set_multicast_loop_v6 call failed");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_multicast_loop_v6</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">multicast_loop_v6</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_multicast_loop_v6</span>(<span class="ident">multicast_loop_v6</span>) } <span class="doccomment">/// Gets the value of the `IPV6_MULTICAST_LOOP` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// For more information about this option, see</span> <span class="doccomment">/// [`set_multicast_loop_v6`][link].</span> <span class="doccomment">///</span> <span class="doccomment">/// [link]: #method.set_multicast_loop_v6</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_multicast_loop_v6(false).expect("set_multicast_loop_v6 call failed");</span> <span class="doccomment">/// assert_eq!(socket.multicast_loop_v6().unwrap(), false);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">multicast_loop_v6</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">bool</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">multicast_loop_v6</span>() } <span class="doccomment">/// Sets the value for the `IP_TTL` option on this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// This value sets the time-to-live field that is used in every packet sent</span> <span class="doccomment">/// from this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_ttl(42).expect("set_ttl call failed");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_ttl</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">ttl</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_ttl</span>(<span class="ident">ttl</span>) } <span class="doccomment">/// Gets the value of the `IP_TTL` option for this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// For more information about this option, see [`set_ttl`][link].</span> <span class="doccomment">///</span> <span class="doccomment">/// [link]: #method.set_ttl</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.set_ttl(42).expect("set_ttl call failed");</span> <span class="doccomment">/// assert_eq!(socket.ttl().unwrap(), 42);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ttl</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">ttl</span>() } <span class="doccomment">/// Executes an operation of the `IP_ADD_MEMBERSHIP` type.</span> <span class="doccomment">///</span> <span class="doccomment">/// This function specifies a new multicast group for this socket to join.</span> <span class="doccomment">/// The address must be a valid multicast address, and `interface` is the</span> <span class="doccomment">/// address of the local interface with which the system should join the</span> <span class="doccomment">/// multicast group. If it's equal to `INADDR_ANY` then an appropriate</span> <span class="doccomment">/// interface is chosen by the system.</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">join_multicast_v4</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">multiaddr</span>: <span class="kw-2">&</span><span class="ident">Ipv4Addr</span>, <span class="ident">interface</span>: <span class="kw-2">&</span><span class="ident">Ipv4Addr</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">join_multicast_v4</span>(<span class="ident">multiaddr</span>, <span class="ident">interface</span>) } <span class="doccomment">/// Executes an operation of the `IPV6_ADD_MEMBERSHIP` type.</span> <span class="doccomment">///</span> <span class="doccomment">/// This function specifies a new multicast group for this socket to join.</span> <span class="doccomment">/// The address must be a valid multicast address, and `interface` is the</span> <span class="doccomment">/// index of the interface to join/leave (or 0 to indicate any interface).</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">join_multicast_v6</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">multiaddr</span>: <span class="kw-2">&</span><span class="ident">Ipv6Addr</span>, <span class="ident">interface</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">join_multicast_v6</span>(<span class="ident">multiaddr</span>, <span class="ident">interface</span>) } <span class="doccomment">/// Executes an operation of the `IP_DROP_MEMBERSHIP` type.</span> <span class="doccomment">///</span> <span class="doccomment">/// For more information about this option, see</span> <span class="doccomment">/// [`join_multicast_v4`][link].</span> <span class="doccomment">///</span> <span class="doccomment">/// [link]: #method.join_multicast_v4</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">leave_multicast_v4</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">multiaddr</span>: <span class="kw-2">&</span><span class="ident">Ipv4Addr</span>, <span class="ident">interface</span>: <span class="kw-2">&</span><span class="ident">Ipv4Addr</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">leave_multicast_v4</span>(<span class="ident">multiaddr</span>, <span class="ident">interface</span>) } <span class="doccomment">/// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type.</span> <span class="doccomment">///</span> <span class="doccomment">/// For more information about this option, see</span> <span class="doccomment">/// [`join_multicast_v6`][link].</span> <span class="doccomment">///</span> <span class="doccomment">/// [link]: #method.join_multicast_v6</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">leave_multicast_v6</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">multiaddr</span>: <span class="kw-2">&</span><span class="ident">Ipv6Addr</span>, <span class="ident">interface</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">leave_multicast_v6</span>(<span class="ident">multiaddr</span>, <span class="ident">interface</span>) } <span class="doccomment">/// Get the value of the `SO_ERROR` option on this socket.</span> <span class="doccomment">///</span> <span class="doccomment">/// This will retrieve the stored error in the underlying socket, clearing</span> <span class="doccomment">/// the field in the process. This can be useful for checking errors between</span> <span class="doccomment">/// calls.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// match socket.take_error() {</span> <span class="doccomment">/// Ok(Some(error)) => println!("UdpSocket error: {:?}", error),</span> <span class="doccomment">/// Ok(None) => println!("No error"),</span> <span class="doccomment">/// Err(error) => println!("UdpSocket.take_error failed: {:?}", error),</span> <span class="doccomment">/// }</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">take_error</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">io</span>::<span class="ident">Error</span><span class="op">>></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">take_error</span>() } <span class="doccomment">/// Connects this UDP socket to a remote address, allowing the `send` and</span> <span class="doccomment">/// `recv` syscalls to be used to send data and also applies filters to only</span> <span class="doccomment">/// receive data from the specified address.</span> <span class="doccomment">///</span> <span class="doccomment">/// If `addr` yields multiple addresses, `connect` will be attempted with</span> <span class="doccomment">/// each of the addresses until the underlying OS function returns no</span> <span class="doccomment">/// error. Note that usually, a successful `connect` call does not specify</span> <span class="doccomment">/// that there is a remote server listening on the port, rather, such an</span> <span class="doccomment">/// error would only be detected after the first send. If the OS returns an</span> <span class="doccomment">/// error for each of the specified addresses, the error returned from the</span> <span class="doccomment">/// last connection attempt (the last address) is returned.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// Create a UDP socket bound to `127.0.0.1:3400` and connect the socket to</span> <span class="doccomment">/// `127.0.0.1:8080`:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:3400").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.connect("127.0.0.1:8080").expect("connect function failed");</span> <span class="doccomment">/// ```</span> <span class="doccomment">///</span> <span class="doccomment">/// Unlike in the TCP case, passing an array of addresses to the `connect`</span> <span class="doccomment">/// function of a UDP socket is not a useful thing to do: The OS will be</span> <span class="doccomment">/// unable to determine whether something is listening on the remote</span> <span class="doccomment">/// address without the application sending data.</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">connect</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToSocketAddrs</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">addr</span>: <span class="ident">A</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="kw">super</span>::<span class="ident">each_addr</span>(<span class="ident">addr</span>, <span class="op">|</span><span class="ident">addr</span><span class="op">|</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">connect</span>(<span class="ident">addr</span>)) } <span class="doccomment">/// Sends data on the socket to the remote address to which it is connected.</span> <span class="doccomment">///</span> <span class="doccomment">/// The [`connect`] method will connect this socket to a remote address. This</span> <span class="doccomment">/// method will fail if the socket is not connected.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`connect`]: #method.connect</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.connect("127.0.0.1:8080").expect("connect function failed");</span> <span class="doccomment">/// socket.send(&[0, 1, 2]).expect("couldn't send message");</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">send</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">send</span>(<span class="ident">buf</span>) } <span class="doccomment">/// Receives a single datagram message on the socket from the remote address to</span> <span class="doccomment">/// which it is connected. On success, returns the number of bytes read.</span> <span class="doccomment">///</span> <span class="doccomment">/// The function must be called with valid byte array `buf` of sufficient size to</span> <span class="doccomment">/// hold the message bytes. If a message is too long to fit in the supplied buffer,</span> <span class="doccomment">/// excess bytes may be discarded.</span> <span class="doccomment">///</span> <span class="doccomment">/// The [`connect`] method will connect this socket to a remote address. This</span> <span class="doccomment">/// method will fail if the socket is not connected.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`connect`]: #method.connect</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.connect("127.0.0.1:8080").expect("connect function failed");</span> <span class="doccomment">/// let mut buf = [0; 10];</span> <span class="doccomment">/// match socket.recv(&mut buf) {</span> <span class="doccomment">/// Ok(received) => println!("received {} bytes {:?}", received, &buf[..received]),</span> <span class="doccomment">/// Err(e) => println!("recv function failed: {:?}", e),</span> <span class="doccomment">/// }</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recv</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">recv</span>(<span class="ident">buf</span>) } <span class="doccomment">/// Receives single datagram on the socket from the remote address to which it is</span> <span class="doccomment">/// connected, without removing the message from input queue. On success, returns</span> <span class="doccomment">/// the number of bytes peeked.</span> <span class="doccomment">///</span> <span class="doccomment">/// The function must be called with valid byte array `buf` of sufficient size to</span> <span class="doccomment">/// hold the message bytes. If a message is too long to fit in the supplied buffer,</span> <span class="doccomment">/// excess bytes may be discarded.</span> <span class="doccomment">///</span> <span class="doccomment">/// Successive calls return the same data. This is accomplished by passing</span> <span class="doccomment">/// `MSG_PEEK` as a flag to the underlying `recv` system call.</span> <span class="doccomment">///</span> <span class="doccomment">/// Do not use this function to implement busy waiting, instead use `libc::poll` to</span> <span class="doccomment">/// synchronize IO events on one or more sockets.</span> <span class="doccomment">///</span> <span class="doccomment">/// The [`connect`] method will connect this socket to a remote address. This</span> <span class="doccomment">/// method will fail if the socket is not connected.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`connect`]: #method.connect</span> <span class="doccomment">///</span> <span class="doccomment">/// # Errors</span> <span class="doccomment">///</span> <span class="doccomment">/// This method will fail if the socket is not connected. The `connect` method</span> <span class="doccomment">/// will connect this socket to a remote address.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");</span> <span class="doccomment">/// socket.connect("127.0.0.1:8080").expect("connect function failed");</span> <span class="doccomment">/// let mut buf = [0; 10];</span> <span class="doccomment">/// match socket.peek(&mut buf) {</span> <span class="doccomment">/// Ok(received) => println!("received {} bytes", received),</span> <span class="doccomment">/// Err(e) => println!("peek function failed: {:?}", e),</span> <span class="doccomment">/// }</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"peek"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.18.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">peek</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">peek</span>(<span class="ident">buf</span>) } <span class="doccomment">/// Moves this UDP socket into or out of nonblocking mode.</span> <span class="doccomment">///</span> <span class="doccomment">/// This will result in `recv`, `recv_from`, `send`, and `send_to`</span> <span class="doccomment">/// operations becoming nonblocking, i.e. immediately returning from their</span> <span class="doccomment">/// calls. If the IO operation is successful, `Ok` is returned and no</span> <span class="doccomment">/// further action is required. If the IO operation could not be completed</span> <span class="doccomment">/// and needs to be retried, an error with kind</span> <span class="doccomment">/// [`io::ErrorKind::WouldBlock`] is returned.</span> <span class="doccomment">///</span> <span class="doccomment">/// On Unix platforms, calling this method corresponds to calling `fcntl`</span> <span class="doccomment">/// `FIONBIO`. On Windows calling this method corresponds to calling</span> <span class="doccomment">/// `ioctlsocket` `FIONBIO`.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`io::ErrorKind::WouldBlock`]: ../io/enum.ErrorKind.html#variant.WouldBlock</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// Create a UDP socket bound to `127.0.0.1:7878` and read bytes in</span> <span class="doccomment">/// nonblocking mode:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```no_run</span> <span class="doccomment">/// use std::io;</span> <span class="doccomment">/// use std::net::UdpSocket;</span> <span class="doccomment">///</span> <span class="doccomment">/// let socket = UdpSocket::bind("127.0.0.1:7878").unwrap();</span> <span class="doccomment">/// socket.set_nonblocking(true).unwrap();</span> <span class="doccomment">///</span> <span class="doccomment">/// # fn wait_for_fd() { unimplemented!() }</span> <span class="doccomment">/// let mut buf = [0; 10];</span> <span class="doccomment">/// let (num_bytes_read, _) = loop {</span> <span class="doccomment">/// match socket.recv_from(&mut buf) {</span> <span class="doccomment">/// Ok(n) => break n,</span> <span class="doccomment">/// Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {</span> <span class="doccomment">/// // wait until network socket is ready, typically implemented</span> <span class="doccomment">/// // via platform-specific APIs such as epoll or IOCP</span> <span class="doccomment">/// wait_for_fd();</span> <span class="doccomment">/// }</span> <span class="doccomment">/// Err(e) => panic!("encountered IO error: {}", e),</span> <span class="doccomment">/// }</span> <span class="doccomment">/// };</span> <span class="doccomment">/// println!("bytes: {:?}", &buf[..num_bytes_read]);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"net2_mutators"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_nonblocking</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">nonblocking</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set_nonblocking</span>(<span class="ident">nonblocking</span>) } } <span class="kw">impl</span> <span class="ident">AsInner</span><span class="op"><</span><span class="ident">net_imp</span>::<span class="ident">UdpSocket</span><span class="op">></span> <span class="kw">for</span> <span class="ident">UdpSocket</span> { <span class="kw">fn</span> <span class="ident">as_inner</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">net_imp</span>::<span class="ident">UdpSocket</span> { <span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span> } } <span class="kw">impl</span> <span class="ident">FromInner</span><span class="op"><</span><span class="ident">net_imp</span>::<span class="ident">UdpSocket</span><span class="op">></span> <span class="kw">for</span> <span class="ident">UdpSocket</span> { <span class="kw">fn</span> <span class="ident">from_inner</span>(<span class="ident">inner</span>: <span class="ident">net_imp</span>::<span class="ident">UdpSocket</span>) <span class="op">-></span> <span class="ident">UdpSocket</span> { <span class="ident">UdpSocket</span>(<span class="ident">inner</span>) } } <span class="kw">impl</span> <span class="ident">IntoInner</span><span class="op"><</span><span class="ident">net_imp</span>::<span class="ident">UdpSocket</span><span class="op">></span> <span class="kw">for</span> <span class="ident">UdpSocket</span> { <span class="kw">fn</span> <span class="ident">into_inner</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">net_imp</span>::<span class="ident">UdpSocket</span> { <span class="self">self</span>.<span class="number">0</span> } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">UdpSocket</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">fmt</span>(<span class="ident">f</span>) } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">test</span>, <span class="ident">not</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"cloudabi"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>))))]</span> <span class="kw">mod</span> <span class="ident">tests</span> { <span class="kw">use</span> <span class="ident">io</span>::<span class="ident">ErrorKind</span>; <span class="kw">use</span> <span class="ident">net</span>::<span class="kw-2">*</span>; <span class="kw">use</span> <span class="ident">net</span>::<span class="ident">test</span>::{<span class="ident">next_test_ip4</span>, <span class="ident">next_test_ip6</span>}; <span class="kw">use</span> <span class="ident">sync</span>::<span class="ident">mpsc</span>::<span class="ident">channel</span>; <span class="kw">use</span> <span class="ident">sys_common</span>::<span class="ident">AsInner</span>; <span class="kw">use</span> <span class="ident">time</span>::{<span class="ident">Instant</span>, <span class="ident">Duration</span>}; <span class="kw">use</span> <span class="ident">thread</span>; <span class="kw">fn</span> <span class="ident">each_ip</span>(<span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">FnMut</span>(<span class="ident">SocketAddr</span>, <span class="ident">SocketAddr</span>)) { <span class="ident">f</span>(<span class="ident">next_test_ip4</span>(), <span class="ident">next_test_ip4</span>()); <span class="ident">f</span>(<span class="ident">next_test_ip6</span>(), <span class="ident">next_test_ip6</span>()); } <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">t</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>:<span class="ident">expr</span>) <span class="op">=></span> { <span class="kw">match</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span> { <span class="prelude-val">Ok</span>(<span class="ident">t</span>) <span class="op">=></span> <span class="ident">t</span>, <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"received error for `{}`: {}"</span>, <span class="macro">stringify</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">e</span>), <span class="ident">e</span>), } } } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">bind_error</span>() { <span class="kw">match</span> <span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="string">"1.1.1.1:9999"</span>) { <span class="prelude-val">Ok</span>(..) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(), <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">e</span>.<span class="ident">kind</span>(), <span class="ident">ErrorKind</span>::<span class="ident">AddrNotAvailable</span>) } } } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">socket_smoke_test_ip4</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">server_ip</span>, <span class="ident">client_ip</span><span class="op">|</span> { <span class="kw">let</span> (<span class="ident">tx1</span>, <span class="ident">rx1</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> (<span class="ident">tx2</span>, <span class="ident">rx2</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> <span class="ident">_t</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span><span class="op">||</span> { <span class="kw">let</span> <span class="ident">client</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">client_ip</span>)); <span class="ident">rx1</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">client</span>.<span class="ident">send_to</span>(<span class="kw-2">&</span>[<span class="number">99</span>], <span class="kw-2">&</span><span class="ident">server_ip</span>)); <span class="ident">tx2</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); }); <span class="kw">let</span> <span class="ident">server</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">server_ip</span>)); <span class="ident">tx1</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>]; <span class="kw">let</span> (<span class="ident">nread</span>, <span class="ident">src</span>) <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">server</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">nread</span>, <span class="number">1</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">buf</span>[<span class="number">0</span>], <span class="number">99</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">src</span>, <span class="ident">client_ip</span>); <span class="ident">rx2</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); }) } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">socket_name_ip4</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">addr</span>, <span class="kw">_</span><span class="op">|</span> { <span class="kw">let</span> <span class="ident">server</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">addr</span>, <span class="macro">t</span><span class="macro">!</span>(<span class="ident">server</span>.<span class="ident">local_addr</span>())); }) } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">udp_clone_smoke</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">addr1</span>, <span class="ident">addr2</span><span class="op">|</span> { <span class="kw">let</span> <span class="ident">sock1</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr1</span>)); <span class="kw">let</span> <span class="ident">sock2</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr2</span>)); <span class="kw">let</span> <span class="ident">_t</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span><span class="op">||</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>]; <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">sock2</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>).<span class="ident">unwrap</span>(), (<span class="number">1</span>, <span class="ident">addr1</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">buf</span>[<span class="number">0</span>], <span class="number">1</span>); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock2</span>.<span class="ident">send_to</span>(<span class="kw-2">&</span>[<span class="number">2</span>], <span class="kw-2">&</span><span class="ident">addr1</span>)); }); <span class="kw">let</span> <span class="ident">sock3</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock1</span>.<span class="ident">try_clone</span>()); <span class="kw">let</span> (<span class="ident">tx1</span>, <span class="ident">rx1</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> (<span class="ident">tx2</span>, <span class="ident">rx2</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> <span class="ident">_t</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span><span class="op">||</span> { <span class="ident">rx1</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock3</span>.<span class="ident">send_to</span>(<span class="kw-2">&</span>[<span class="number">1</span>], <span class="kw-2">&</span><span class="ident">addr2</span>)); <span class="ident">tx2</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); }); <span class="ident">tx1</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>]; <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">sock1</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>).<span class="ident">unwrap</span>(), (<span class="number">1</span>, <span class="ident">addr2</span>)); <span class="ident">rx2</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); }) } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">udp_clone_two_read</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">addr1</span>, <span class="ident">addr2</span><span class="op">|</span> { <span class="kw">let</span> <span class="ident">sock1</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr1</span>)); <span class="kw">let</span> <span class="ident">sock2</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr2</span>)); <span class="kw">let</span> (<span class="ident">tx1</span>, <span class="ident">rx</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> <span class="ident">tx2</span> <span class="op">=</span> <span class="ident">tx1</span>.<span class="ident">clone</span>(); <span class="kw">let</span> <span class="ident">_t</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span><span class="op">||</span> { <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock2</span>.<span class="ident">send_to</span>(<span class="kw-2">&</span>[<span class="number">1</span>], <span class="kw-2">&</span><span class="ident">addr1</span>)); <span class="ident">rx</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock2</span>.<span class="ident">send_to</span>(<span class="kw-2">&</span>[<span class="number">2</span>], <span class="kw-2">&</span><span class="ident">addr1</span>)); <span class="ident">rx</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); }); <span class="kw">let</span> <span class="ident">sock3</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock1</span>.<span class="ident">try_clone</span>()); <span class="kw">let</span> (<span class="ident">done</span>, <span class="ident">rx</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> <span class="ident">_t</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span><span class="op">||</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>]; <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock3</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="ident">tx2</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); <span class="ident">done</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); }); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">0</span>]; <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock1</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="ident">tx1</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); <span class="ident">rx</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); }) } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">udp_clone_two_write</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">addr1</span>, <span class="ident">addr2</span><span class="op">|</span> { <span class="kw">let</span> <span class="ident">sock1</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr1</span>)); <span class="kw">let</span> <span class="ident">sock2</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr2</span>)); <span class="kw">let</span> (<span class="ident">tx</span>, <span class="ident">rx</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> (<span class="ident">serv_tx</span>, <span class="ident">serv_rx</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> <span class="ident">_t</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span><span class="op">||</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>, <span class="number">1</span>]; <span class="ident">rx</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock2</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="ident">serv_tx</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); }); <span class="kw">let</span> <span class="ident">sock3</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">sock1</span>.<span class="ident">try_clone</span>()); <span class="kw">let</span> (<span class="ident">done</span>, <span class="ident">rx</span>) <span class="op">=</span> <span class="ident">channel</span>(); <span class="kw">let</span> <span class="ident">tx2</span> <span class="op">=</span> <span class="ident">tx</span>.<span class="ident">clone</span>(); <span class="kw">let</span> <span class="ident">_t</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span><span class="op">||</span> { <span class="kw">match</span> <span class="ident">sock3</span>.<span class="ident">send_to</span>(<span class="kw-2">&</span>[<span class="number">1</span>], <span class="kw-2">&</span><span class="ident">addr2</span>) { <span class="prelude-val">Ok</span>(..) <span class="op">=></span> { <span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">tx2</span>.<span class="ident">send</span>(()); } <span class="prelude-val">Err</span>(..) <span class="op">=></span> {} } <span class="ident">done</span>.<span class="ident">send</span>(()).<span class="ident">unwrap</span>(); }); <span class="kw">match</span> <span class="ident">sock1</span>.<span class="ident">send_to</span>(<span class="kw-2">&</span>[<span class="number">2</span>], <span class="kw-2">&</span><span class="ident">addr2</span>) { <span class="prelude-val">Ok</span>(..) <span class="op">=></span> { <span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">tx</span>.<span class="ident">send</span>(()); } <span class="prelude-val">Err</span>(..) <span class="op">=></span> {} } <span class="ident">drop</span>(<span class="ident">tx</span>); <span class="ident">rx</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); <span class="ident">serv_rx</span>.<span class="ident">recv</span>().<span class="ident">unwrap</span>(); }) } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">debug</span>() { <span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">windows</span>) {<span class="string">"socket"</span>} <span class="kw">else</span> {<span class="string">"fd"</span>}; <span class="kw">let</span> <span class="ident">socket_addr</span> <span class="op">=</span> <span class="ident">next_test_ip4</span>(); <span class="kw">let</span> <span class="ident">udpsock</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">socket_addr</span>)); <span class="kw">let</span> <span class="ident">udpsock_inner</span> <span class="op">=</span> <span class="ident">udpsock</span>.<span class="number">0</span>.<span class="ident">socket</span>().<span class="ident">as_inner</span>(); <span class="kw">let</span> <span class="ident">compare</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"UdpSocket {{ addr: {:?}, {}: {:?} }}"</span>, <span class="ident">socket_addr</span>, <span class="ident">name</span>, <span class="ident">udpsock_inner</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">udpsock</span>), <span class="ident">compare</span>); } <span class="comment">// FIXME: re-enabled bitrig/openbsd/netbsd tests once their socket timeout code</span> <span class="comment">// no longer has rounding errors.</span> <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"bitrig"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"netbsd"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"openbsd"</span>), <span class="ident">ignore</span>)]</span> <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">timeouts</span>() { <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">next_test_ip4</span>(); <span class="kw">let</span> <span class="ident">stream</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="kw">let</span> <span class="ident">dur</span> <span class="op">=</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">15410</span>, <span class="number">0</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">read_timeout</span>())); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">set_read_timeout</span>(<span class="prelude-val">Some</span>(<span class="ident">dur</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="ident">dur</span>), <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">read_timeout</span>())); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">write_timeout</span>())); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">set_write_timeout</span>(<span class="prelude-val">Some</span>(<span class="ident">dur</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Some</span>(<span class="ident">dur</span>), <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">write_timeout</span>())); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">set_read_timeout</span>(<span class="prelude-val">None</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">read_timeout</span>())); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">set_write_timeout</span>(<span class="prelude-val">None</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">None</span>, <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">write_timeout</span>())); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">test_read_timeout</span>() { <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">next_test_ip4</span>(); <span class="kw">let</span> <span class="ident">stream</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">set_read_timeout</span>(<span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">1000</span>)))); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">10</span>]; <span class="kw">let</span> <span class="ident">start</span> <span class="op">=</span> <span class="ident">Instant</span>::<span class="ident">now</span>(); <span class="kw">let</span> <span class="ident">kind</span> <span class="op">=</span> <span class="ident">stream</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>).<span class="ident">err</span>().<span class="ident">expect</span>(<span class="string">"expected error"</span>).<span class="ident">kind</span>(); <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">kind</span> <span class="op">==</span> <span class="ident">ErrorKind</span>::<span class="ident">WouldBlock</span> <span class="op">||</span> <span class="ident">kind</span> <span class="op">==</span> <span class="ident">ErrorKind</span>::<span class="ident">TimedOut</span>); <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">start</span>.<span class="ident">elapsed</span>() <span class="op">></span> <span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">400</span>)); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">test_read_with_timeout</span>() { <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">next_test_ip4</span>(); <span class="kw">let</span> <span class="ident">stream</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">set_read_timeout</span>(<span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">1000</span>)))); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">send_to</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">addr</span>)); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">11</span>]; <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">buf</span>[..]); <span class="kw">let</span> <span class="ident">start</span> <span class="op">=</span> <span class="ident">Instant</span>::<span class="ident">now</span>(); <span class="kw">let</span> <span class="ident">kind</span> <span class="op">=</span> <span class="ident">stream</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>).<span class="ident">err</span>().<span class="ident">expect</span>(<span class="string">"expected error"</span>).<span class="ident">kind</span>(); <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">kind</span> <span class="op">==</span> <span class="ident">ErrorKind</span>::<span class="ident">WouldBlock</span> <span class="op">||</span> <span class="ident">kind</span> <span class="op">==</span> <span class="ident">ErrorKind</span>::<span class="ident">TimedOut</span>); <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">start</span>.<span class="ident">elapsed</span>() <span class="op">></span> <span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">400</span>)); } <span class="comment">// Ensure the `set_read_timeout` and `set_write_timeout` calls return errors</span> <span class="comment">// when passed zero Durations</span> <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">test_timeout_zero_duration</span>() { <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">next_test_ip4</span>(); <span class="kw">let</span> <span class="ident">socket</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">socket</span>.<span class="ident">set_write_timeout</span>(<span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>))); <span class="kw">let</span> <span class="ident">err</span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">unwrap_err</span>(); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">err</span>.<span class="ident">kind</span>(), <span class="ident">ErrorKind</span>::<span class="ident">InvalidInput</span>); <span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">socket</span>.<span class="ident">set_read_timeout</span>(<span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>))); <span class="kw">let</span> <span class="ident">err</span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">unwrap_err</span>(); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">err</span>.<span class="ident">kind</span>(), <span class="ident">ErrorKind</span>::<span class="ident">InvalidInput</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">connect_send_recv</span>() { <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">next_test_ip4</span>(); <span class="kw">let</span> <span class="ident">socket</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">connect</span>(<span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">send</span>(<span class="string">b"hello world"</span>)); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">11</span>]; <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">recv</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">buf</span>[..]); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">connect_send_peek_recv</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">addr</span>, <span class="kw">_</span><span class="op">|</span> { <span class="kw">let</span> <span class="ident">socket</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">connect</span>(<span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">send</span>(<span class="string">b"hello world"</span>)); <span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">1</span>..<span class="number">3</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">11</span>]; <span class="kw">let</span> <span class="ident">size</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">peek</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">buf</span>[..]); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">size</span>, <span class="number">11</span>); } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">11</span>]; <span class="kw">let</span> <span class="ident">size</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">recv</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">buf</span>[..]); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">size</span>, <span class="number">11</span>); }) } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">peek_from</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">addr</span>, <span class="kw">_</span><span class="op">|</span> { <span class="kw">let</span> <span class="ident">socket</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">send_to</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">addr</span>)); <span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">1</span>..<span class="number">3</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">11</span>]; <span class="kw">let</span> (<span class="ident">size</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">peek_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">buf</span>[..]); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">size</span>, <span class="number">11</span>); } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">11</span>]; <span class="kw">let</span> (<span class="ident">size</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">recv_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"hello world"</span>, <span class="kw-2">&</span><span class="ident">buf</span>[..]); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">size</span>, <span class="number">11</span>); }) } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">ttl</span>() { <span class="kw">let</span> <span class="ident">ttl</span> <span class="op">=</span> <span class="number">100</span>; <span class="kw">let</span> <span class="ident">addr</span> <span class="op">=</span> <span class="ident">next_test_ip4</span>(); <span class="kw">let</span> <span class="ident">stream</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">set_ttl</span>(<span class="ident">ttl</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">ttl</span>, <span class="macro">t</span><span class="macro">!</span>(<span class="ident">stream</span>.<span class="ident">ttl</span>())); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">set_nonblocking</span>() { <span class="ident">each_ip</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">addr</span>, <span class="kw">_</span><span class="op">|</span> { <span class="kw">let</span> <span class="ident">socket</span> <span class="op">=</span> <span class="macro">t</span><span class="macro">!</span>(<span class="ident">UdpSocket</span>::<span class="ident">bind</span>(<span class="kw-2">&</span><span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">set_nonblocking</span>(<span class="bool-val">true</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">set_nonblocking</span>(<span class="bool-val">false</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">connect</span>(<span class="ident">addr</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">set_nonblocking</span>(<span class="bool-val">false</span>)); <span class="macro">t</span><span class="macro">!</span>(<span class="ident">socket</span>.<span class="ident">set_nonblocking</span>(<span class="bool-val">true</span>)); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span>]; <span class="kw">match</span> <span class="ident">socket</span>.<span class="ident">recv</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>) { <span class="prelude-val">Ok</span>(<span class="kw">_</span>) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"expected error"</span>), <span class="prelude-val">Err</span>(<span class="kw-2">ref</span> <span class="ident">e</span>) <span class="kw">if</span> <span class="ident">e</span>.<span class="ident">kind</span>() <span class="op">==</span> <span class="ident">ErrorKind</span>::<span class="ident">WouldBlock</span> <span class="op">=></span> {} <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"unexpected error {}"</span>, <span class="ident">e</span>), } }) } } </pre> </section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../../";window.currentCrate = "std";</script><script src="../../../aliases.js"></script><script src="../../../main.js"></script><script defer src="../../../search-index.js"></script></body></html>