docs-nodejs/dgram.html

<!DOCTYPE html><html lang="en"><head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>UDP/Datagram Sockets | Node.js v12.10.0 Documentation</title>
  <link rel="stylesheet" href="data:text/css;base64,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">
  <link rel="stylesheet" href="data:text/css;base64,/*--------------------- Layout and Typography ----------------------------*/
html {
  font-size: 1rem;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-variant-ligatures: none;
          font-variant-ligatures: none;
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Lato", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Verdana, Tahoma, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background: #fff;
}

h1 { font-size: 2.5rem }
h2 { font-size: 2rem }
h3 { font-size: 1.75rem }
h4 { font-size: 1.5rem }
h5 { font-size: 1.25rem }
h6 { font-size: 1rem }

h1, h2, h3, h4, h5, h6 {
  margin: 1.5rem 0 1rem;
  text-rendering: optimizeLegibility;
  font-weight: 700;
  position: relative;
}

pre, tt, code, .pre, span.type, a.type {
  font-family: SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: .9em;
}

#content {
  position: relative;
}

a, a:link, a:active {
  color: #43853d;
  text-decoration: none;
  border-radius: 2px;
  padding: 1px 3px;
}

a:hover, a:focus {
  color: #fff;
  background-color: #43853d;
  outline: none;
}

strong {
  font-weight: 700;
}

code a:hover {
  background: none;
}

em code {
  font-style: normal;
}

#changelog #gtoc {
  display: none;
}

#gtoc {
  margin-top: .5rem;
  margin-bottom: 1rem;
}

#gtoc ul {
  list-style: none;
  margin-left: 0;
  line-height: 1.5rem;
}

#gtoc > ul > li {
  display: inline;
  border-right: 1px #000 solid;
  margin-right: 0.4rem;
  padding-right: 0.4rem;
}

#gtoc > ul > li:last-child {
  border-right: none;
  margin-right: 0;
  padding-right: 0;
}

li.version-picker {
  position: relative;
}

li.version-picker:hover > a {
  border-radius: 2px 2px 0 0;
}

li.version-picker:hover > ol {
  display: block;
  z-index: 1;
}

li.version-picker a span {
  font-size: .7rem;
}

ol.version-picker {
  background: #fff;
  border: 1px #43853d solid;
  border-radius: 0 0 2px 2px;
  display: none;
  list-style: none;
  position: absolute;
  right: 0;
  top: 1.25rem;
  width: 100%;
}

#gtoc ol.version-picker li {
  display: block;
  border-right: 0;
  margin-right: 0;
}

ol.version-picker li a {
  border-radius: 0;
  display: block;
  margin: 0;
  padding: .1rem;
  padding-left: 1rem;
}

ol.version-picker li:last-child a {
  border-bottom-right-radius: 1px;
  border-bottom-left-radius: 1px;
}

.line {
  width: calc(100% - 1rem);
  display: block;
  padding-bottom: 1px;
}

.api_stability {
  color: white !important;
  margin: 0 0 1rem 0;
  font-family: "Lato", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Verdana, Tahoma, sans-serif;
  padding: 1rem;
  line-height: 1.5;
}

.api_stability * {
  color: white !important;
}

.api_stability a {
  text-decoration: underline;
}

.api_stability a:hover, .api_stability a:active, .api_stability a:focus {
  background: rgba(255, 255, 255, .4);
}

.api_stability a code {
  background: none;
}

.api_stability_0 {
  background-color: #D60027;
}

.api_stability_1 {
  background-color: #EC5315;
}

.api_stability_2 {
  background-color: #4EBA0F;
}

.api_metadata {
  font-size: .85rem;
  margin-bottom: 1rem;
}

.api_metadata span {
  margin-right: 1rem;
}

.api_metadata span:last-child {
  margin-right: 0px;
}

ul.plain {
  list-style: none;
}

abbr {
  border-bottom: 1px dotted #454545;
}

p {
  text-rendering: optimizeLegibility;
  margin: 0 0 1.125rem 0;
  line-height: 1.5;
}

#apicontent > *:last-child {
  margin-bottom: 0;
  padding-bottom: 2rem;
}

table {
  border-collapse: collapse;
  margin: 0 0 1.5rem 0;
}

th, td {
  border: 1px solid #aaa;
  padding: .75rem 1rem .75rem 1rem;
  vertical-align: top;
}

th {
  text-align:left;
}

ol, ul, dl {
  margin: 0 0 .6rem 0;
  padding: 0;
}

ol ul, ol ol, ol dl, ul ul, ul ol, ul dl, dl ul, dl ol, dl dl {
  margin-bottom: 0;
}

ul, ol {
  margin-left: 2rem;
}

dl dt {
  position: relative;
  margin: 1.5rem 0 0;
}

dl dd {
  position: relative;
  margin: 0 1rem 0;
}

dd + dt.pre {
  margin-top: 1.6rem;
}

#apicontent {
  padding-top: 1rem;
}

#apicontent .line {
  width: calc(50% - 1rem);
  margin: 1rem 1rem .95rem;
  background-color: #ccc;
}

h2 + h2 {
  margin: 0 0 .5rem;
}

h3 + h3 {
  margin: 0 0 .5rem;
}

h2, h3, h4, h5 {
  position: relative;
  padding-right: 40px;
}

.srclink {
  float: right;
  font-size: smaller;
}

h1 span, h2 span, h3 span, h4 span {
  position: absolute;
  display: block;
  top: 0;
  right: 0;
}

h1 span:hover, h2 span:hover, h3 span:hover, h4 span:hover {
  opacity: 1;
}

h1 span a, h2 span a, h3 span a, h4 span a {
  color: #000;
  text-decoration: none;
  font-weight: bold;
}

pre, tt, code {
  line-height: 1.5rem;
  margin: 0; padding: 0;
}

.pre {
  line-height: 1.5rem;
}

pre {
  padding: 1rem;
  vertical-align: top;
  background: #f2f2f2;
  margin: 1rem;
  overflow-x: auto;
}

pre > code {
  padding: 0;
}

pre + h3 {
  margin-top: 2.225rem;
}

code.pre {
  white-space: pre;
}

#intro {
  margin-top: 1.25rem;
  margin-left: 1rem;
}

#intro a {
  color: #ddd;
  font-weight: bold;
}

hr {
  background: none;
  border: medium none;
  border-bottom: 1px solid #7a7a7a;
  margin: 0 0 1rem 0;
}

#toc h2 {
  margin-top: 0;
  margin: 1.5rem 0;
}

#toc p {
  margin: 0;
}

#toc ul a {
  text-decoration:none;
}

#toc ul li {
  margin-bottom: .666rem;
  list-style: square outside;
}

#toc li > ul {
  margin-top: .666rem;
}

#toc .stability_0::after {
  background-color: #d50027;
  color: #fff;
  content: "deprecated";
  margin-left: .25rem;
  padding: 1px 3px;
  border-radius: 3px;
}

#apicontent li {
  margin-bottom: .5rem;
}

#apicontent li:last-child {
  margin-bottom: 0;
}

tt, code {
  color: #040404;
  background-color: #f2f2f2;
  border-radius: 2px;
  padding: 1px 3px;
}

.api_stability code {
  background: rgba(0, 0, 0, .1);
}

a code {
  color: inherit;
  background: inherit;
  padding: 0;
}

.type {
  line-height: 1.5rem;
}

#column1.interior {
  margin-left: 234px;
  padding: 0 2rem;
  -webkit-padding-start: 1.5rem;
}

#column2.interior {
  width: 234px;
  background: #333;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  overflow-x: hidden;
  overflow-y: scroll;
}

#column2 ul {
  list-style: none;
  margin: .9rem 0 .5rem;
  background: #333;
}

#column2 > :first-child {
  margin: 1.25rem;
  font-size: 1.5rem;
}

#column2 > ul:nth-child(2) {
  margin: 1.25rem 0 .5rem;
}

#column2 > ul:last-child {
  margin: .9rem 0 1.25rem;
}

#column2 ul li {
  padding-left: 1.25rem;
  margin-bottom: .5rem;
  padding-bottom: .5rem;
}

#column2 .line {
  margin: 0 .5rem;
  background-color: #707070;
}

#column2 ul li:last-child {
  margin-bottom: 0;
}

#column2 ul li a {
  color: #ccc;
  border-radius: 0;
}

#column2 ul li a.active, #column2 ul li a.active:hover,
#column2 ul li a.active:focus {
  color: #43853d;
  border-radius: 0;
  border-bottom: 1px solid #43853d;
  background: none;
}

#intro a:hover, #intro a:focus,
#column2 ul li a:hover, #column2 ul li a:focus {
  color: #fff;
  background: none;
}

span > .mark, span > .mark:visited {
  color: #707070;
  position: absolute;
  top: 0px;
  right: 0px;
}

span > .mark:hover, span > .mark:focus, span > .mark:active {
  color: #43853d;
  background: none;
}

th > *:last-child, td > *:last-child {
  margin-bottom: 0;
}

.changelog > summary {
  margin: .5rem 0;
  padding: .5rem 0;
  cursor: pointer;
}

/* simpler clearfix */
.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}

.github_icon {
  vertical-align: middle;
  margin: -2px 3px 0 0;
}

@media only screen and (max-width: 1024px) {
  #content {
    overflow: visible;
  }
  #column1.interior {
    margin-left: 0;
    padding-left: .5rem;
    padding-right: .5rem;
    width: auto;
    overflow-y: visible;
  }
  #column2 {
    display: none;
  }
}

@media print {
  html {
    height: auto;
    font-size: 0.75em;
  }
  #column2.interior {
    display: none;
  }
  #column1.interior {
    margin-left: 0px;
    padding: 0px;
    overflow-y: auto;
  }
  .api_metadata,
  #toc,
  .srclink,
  #gtoc,
  .mark {
    display: none;
  }
  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.75rem;
  }
  h3 {
    font-size: 1.5rem;
  }
  h4 {
    font-size: 1.3rem;
  }
  h5 {
    font-size: 1.2rem;
  }
  h6 {
    font-size: 1.1rem;
  }
  .api_stability {
    display: inline-block;
  }
  .api_stability a {
    text-decoration: none;
  }
  a {
    color: inherit;
  }
  #apicontent {
    overflow: hidden;
  }
}
">
  <link rel="stylesheet" href="data:text/css;base64,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">
  <link rel="canonical" href="https://nodejs.org/api/dgram.html">
</head>
<body class="alt apidoc" id="api-section-dgram">
  <div id="content" class="clearfix">
    <div id="column2" class="interior">
      <div id="intro" class="interior">
        <a href="https://nodejs.org/" title="Go back to the home page">
          Node.js
        </a>
      </div>
      <ul>
<li><a href="https://nodejs.org/api/documentation.html" class="nav-documentation">About these Docs</a></li>
<li><a href="https://nodejs.org/api/synopsis.html" class="nav-synopsis">Usage &amp; Example</a></li>
</ul>
<div class="line"></div>
<ul>
<li><a href="https://nodejs.org/api/assert.html" class="nav-assert">Assertion Testing</a></li>
<li><a href="https://nodejs.org/api/async_hooks.html" class="nav-async_hooks">Async Hooks</a></li>
<li><a href="https://nodejs.org/api/buffer.html" class="nav-buffer">Buffer</a></li>
<li><a href="https://nodejs.org/api/addons.html" class="nav-addons">C++ Addons</a></li>
<li><a href="https://nodejs.org/api/n-api.html" class="nav-n-api">C/C++ Addons - N-API</a></li>
<li><a href="https://nodejs.org/api/child_process.html" class="nav-child_process">Child Processes</a></li>
<li><a href="https://nodejs.org/api/cluster.html" class="nav-cluster">Cluster</a></li>
<li><a href="https://nodejs.org/api/cli.html" class="nav-cli">Command Line Options</a></li>
<li><a href="https://nodejs.org/api/console.html" class="nav-console">Console</a></li>
<li><a href="https://nodejs.org/api/crypto.html" class="nav-crypto">Crypto</a></li>
<li><a href="https://nodejs.org/api/debugger.html" class="nav-debugger">Debugger</a></li>
<li><a href="https://nodejs.org/api/deprecations.html" class="nav-deprecations">Deprecated APIs</a></li>
<li><a href="https://nodejs.org/api/dns.html" class="nav-dns">DNS</a></li>
<li><a href="https://nodejs.org/api/domain.html" class="nav-domain">Domain</a></li>
<li><a href="https://nodejs.org/api/esm.html" class="nav-esm">ECMAScript Modules</a></li>
<li><a href="https://nodejs.org/api/errors.html" class="nav-errors">Errors</a></li>
<li><a href="https://nodejs.org/api/events.html" class="nav-events">Events</a></li>
<li><a href="https://nodejs.org/api/fs.html" class="nav-fs">File System</a></li>
<li><a href="https://nodejs.org/api/globals.html" class="nav-globals">Globals</a></li>
<li><a href="https://nodejs.org/api/http.html" class="nav-http">HTTP</a></li>
<li><a href="https://nodejs.org/api/http2.html" class="nav-http2">HTTP/2</a></li>
<li><a href="https://nodejs.org/api/https.html" class="nav-https">HTTPS</a></li>
<li><a href="https://nodejs.org/api/inspector.html" class="nav-inspector">Inspector</a></li>
<li><a href="https://nodejs.org/api/intl.html" class="nav-intl">Internationalization</a></li>
<li><a href="https://nodejs.org/api/modules.html" class="nav-modules">Modules</a></li>
<li><a href="https://nodejs.org/api/net.html" class="nav-net">Net</a></li>
<li><a href="https://nodejs.org/api/os.html" class="nav-os">OS</a></li>
<li><a href="https://nodejs.org/api/path.html" class="nav-path">Path</a></li>
<li><a href="https://nodejs.org/api/perf_hooks.html" class="nav-perf_hooks">Performance Hooks</a></li>
<li><a href="https://nodejs.org/api/policy.html" class="nav-policy">Policies</a></li>
<li><a href="https://nodejs.org/api/process.html" class="nav-process">Process</a></li>
<li><a href="https://nodejs.org/api/punycode.html" class="nav-punycode">Punycode</a></li>
<li><a href="https://nodejs.org/api/querystring.html" class="nav-querystring">Query Strings</a></li>
<li><a href="https://nodejs.org/api/readline.html" class="nav-readline">Readline</a></li>
<li><a href="https://nodejs.org/api/repl.html" class="nav-repl">REPL</a></li>
<li><a href="https://nodejs.org/api/report.html" class="nav-report">Report</a></li>
<li><a href="https://nodejs.org/api/stream.html" class="nav-stream">Stream</a></li>
<li><a href="https://nodejs.org/api/string_decoder.html" class="nav-string_decoder">String Decoder</a></li>
<li><a href="https://nodejs.org/api/timers.html" class="nav-timers">Timers</a></li>
<li><a href="https://nodejs.org/api/tls.html" class="nav-tls">TLS/SSL</a></li>
<li><a href="https://nodejs.org/api/tracing.html" class="nav-tracing">Trace Events</a></li>
<li><a href="https://nodejs.org/api/tty.html" class="nav-tty">TTY</a></li>
<li><a href="https://nodejs.org/api/dgram.html" class="nav-dgram active">UDP/Datagram</a></li>
<li><a href="https://nodejs.org/api/url.html" class="nav-url">URL</a></li>
<li><a href="https://nodejs.org/api/util.html" class="nav-util">Utilities</a></li>
<li><a href="https://nodejs.org/api/v8.html" class="nav-v8">V8</a></li>
<li><a href="https://nodejs.org/api/vm.html" class="nav-vm">VM</a></li>
<li><a href="https://nodejs.org/api/worker_threads.html" class="nav-worker_threads">Worker Threads</a></li>
<li><a href="https://nodejs.org/api/zlib.html" class="nav-zlib">Zlib</a></li>
</ul>
<div class="line"></div>
<ul>
<li><a href="https://github.com/nodejs/node" class="nav-https-github-com-nodejs-node">GitHub Repo &amp; Issue Tracker</a></li>
</ul>
    </div>

    <div id="column1" data-id="dgram" class="interior">
      <header>
        <h1>Node.js v12.10.0 Documentation</h1>
        <div id="gtoc">
          <ul>
            <li>
              <a href="https://nodejs.org/api/index.html" name="toc">Index</a>
            </li>
            <li>
              <a href="https://nodejs.org/api/all.html">View on single page</a>
            </li>
            <li>
              <a href="https://nodejs.org/api/dgram.json">View as JSON</a>
            </li>
            
    <li class="version-picker">
      <a href="#">View another version <span>▼</span></a>
      <ol class="version-picker"><li><a href="https://nodejs.org/docs/latest-v12.x/api/dgram.html">12.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v11.x/api/dgram.html">11.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v10.x/api/dgram.html">10.x <b>LTS</b></a></li>
<li><a href="https://nodejs.org/docs/latest-v9.x/api/dgram.html">9.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v8.x/api/dgram.html">8.x <b>LTS</b></a></li>
<li><a href="https://nodejs.org/docs/latest-v7.x/api/dgram.html">7.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v6.x/api/dgram.html">6.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v5.x/api/dgram.html">5.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v4.x/api/dgram.html">4.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v0.12.x/api/dgram.html">0.12.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v0.10.x/api/dgram.html">0.10.x</a></li></ol>
    </li>
  
            <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/master/doc/api/dgram.md"><span class="github_icon"><svg height="16" width="16" viewBox="0 0 16.1 16.1" fill="currentColor"><path d="M8 0a8 8 0 0 0-2.5 15.6c.4 0 .5-.2.5-.4v-1.5c-2 .4-2.5-.5-2.7-1 0-.1-.5-.9-.8-1-.3-.2-.7-.6 0-.6.6 0 1 .6 1.2.8.7 1.2 1.9 1 2.4.7 0-.5.2-.9.5-1-1.8-.3-3.7-1-3.7-4 0-.9.3-1.6.8-2.2 0-.2-.3-1 .1-2 0 0 .7-.3 2.2.7a7.4 7.4 0 0 1 4 0c1.5-1 2.2-.8 2.2-.8.5 1.1.2 2 .1 2.1.5.6.8 1.3.8 2.2 0 3-1.9 3.7-3.6 4 .3.2.5.7.5 1.4v2.2c0 .2.1.5.5.4A8 8 0 0 0 16 8a8 8 0 0 0-8-8z"></path></svg></span>Edit on GitHub</a></li>
          </ul>
        </div>
        <hr>
      </header>

      <div id="toc">
        <h2>Table of Contents</h2>
        <ul>
<li>
<p><span class="stability_2"><a href="#dgram_udp_datagram_sockets">UDP/Datagram Sockets</a></span></p>
<ul>
<li>
<p><a href="#dgram_class_dgram_socket">Class: dgram.Socket</a></p>
<ul>
<li><a href="#dgram_event_close">Event: 'close'</a></li>
<li><a href="#dgram_event_connect">Event: 'connect'</a></li>
<li><a href="#dgram_event_error">Event: 'error'</a></li>
<li><a href="#dgram_event_listening">Event: 'listening'</a></li>
<li><a href="#dgram_event_message">Event: 'message'</a></li>
<li><a href="#dgram_socket_addmembership_multicastaddress_multicastinterface">socket.addMembership(multicastAddress[, multicastInterface])</a></li>
<li><a href="#dgram_socket_address">socket.address()</a></li>
<li><a href="#dgram_socket_bind_port_address_callback">socket.bind([port][, address][, callback])</a></li>
<li><a href="#dgram_socket_bind_options_callback">socket.bind(options[, callback])</a></li>
<li><a href="#dgram_socket_close_callback">socket.close([callback])</a></li>
<li><a href="#dgram_socket_connect_port_address_callback">socket.connect(port[, address][, callback])</a></li>
<li><a href="#dgram_socket_disconnect">socket.disconnect()</a></li>
<li><a href="#dgram_socket_dropmembership_multicastaddress_multicastinterface">socket.dropMembership(multicastAddress[, multicastInterface])</a></li>
<li><a href="#dgram_socket_getrecvbuffersize">socket.getRecvBufferSize()</a></li>
<li><a href="#dgram_socket_getsendbuffersize">socket.getSendBufferSize()</a></li>
<li><a href="#dgram_socket_ref">socket.ref()</a></li>
<li><a href="#dgram_socket_remoteaddress">socket.remoteAddress()</a></li>
<li><a href="#dgram_socket_send_msg_offset_length_port_address_callback">socket.send(msg[, offset, length][, port][, address][, callback])</a></li>
<li><a href="#dgram_socket_setbroadcast_flag">socket.setBroadcast(flag)</a></li>
<li>
<p><a href="#dgram_socket_setmulticastinterface_multicastinterface">socket.setMulticastInterface(multicastInterface)</a></p>
<ul>
<li><a href="#dgram_examples_ipv6_outgoing_multicast_interface">Examples: IPv6 Outgoing Multicast Interface</a></li>
<li><a href="#dgram_example_ipv4_outgoing_multicast_interface">Example: IPv4 Outgoing Multicast Interface</a></li>
<li><a href="#dgram_call_results">Call Results</a></li>
</ul>
</li>
<li><a href="#dgram_socket_setmulticastloopback_flag">socket.setMulticastLoopback(flag)</a></li>
<li><a href="#dgram_socket_setmulticastttl_ttl">socket.setMulticastTTL(ttl)</a></li>
<li><a href="#dgram_socket_setrecvbuffersize_size">socket.setRecvBufferSize(size)</a></li>
<li><a href="#dgram_socket_setsendbuffersize_size">socket.setSendBufferSize(size)</a></li>
<li><a href="#dgram_socket_setttl_ttl">socket.setTTL(ttl)</a></li>
<li><a href="#dgram_socket_unref">socket.unref()</a></li>
<li><a href="#dgram_change_to_asynchronous_socket_bind_behavior">Change to asynchronous <code>socket.bind()</code> behavior</a></li>
</ul>
</li>
<li>
<p><a href="#dgram_dgram_module_functions"><code>dgram</code> module functions</a></p>
<ul>
<li><a href="#dgram_dgram_createsocket_options_callback">dgram.createSocket(options[, callback])</a></li>
<li><a href="#dgram_dgram_createsocket_type_callback">dgram.createSocket(type[, callback])</a></li>
</ul>
</li>
</ul>
</li>
</ul>
      </div>

      <div id="apicontent">
        <h1>UDP/Datagram Sockets<span><a class="mark" href="#dgram_udp_datagram_sockets" id="dgram_udp_datagram_sockets">#</a></span></h1>

<p></p><div class="api_stability api_stability_2"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 2</a> - Stable</div><p></p>

<p>The <code>dgram</code> module provides an implementation of UDP Datagram sockets.</p>
<pre><code class="language-js">const dgram = require('dgram');
const server = dgram.createSocket('udp4');

server.on('error', (err) =&gt; {
  console.log(`server error:\n${err.stack}`);
  server.close();
});

server.on('message', (msg, rinfo) =&gt; {
  console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
});

server.on('listening', () =&gt; {
  const address = server.address();
  console.log(`server listening ${address.address}:${address.port}`);
});

server.bind(41234);
// Prints: server listening 0.0.0.0:41234
</code></pre>
<h2>Class: dgram.Socket<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L88">[src]</a><span><a class="mark" href="#dgram_class_dgram_socket" id="dgram_class_dgram_socket">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<ul>
<li>Extends: <a href="https://nodejs.org/api/events.html#events_class_eventemitter" class="type">&lt;EventEmitter&gt;</a></li>
</ul>
<p>Encapsulates the datagram functionality.</p>
<p>New instances of <code>dgram.Socket</code> are created using <a href="#dgram_dgram_createsocket_options_callback"><code>dgram.createSocket()</code></a>.
The <code>new</code> keyword is not to be used to create <code>dgram.Socket</code> instances.</p>
<h3>Event: 'close'<span><a class="mark" href="#dgram_event_close" id="dgram_event_close">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<p>The <code>'close'</code> event is emitted after a socket is closed with <a href="#dgram_socket_close_callback"><code>close()</code></a>.
Once triggered, no new <code>'message'</code> events will be emitted on this socket.</p>
<h3>Event: 'connect'<span><a class="mark" href="#dgram_event_connect" id="dgram_event_connect">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v12.0.0</span>
</div>
<p>The <code>'connect'</code> event is emitted after a socket is associated to a remote
address as a result of a successful <a href="#dgram_socket_connect_port_address_callback"><code>connect()</code></a> call.</p>
<h3>Event: 'error'<span><a class="mark" href="#dgram_event_error" id="dgram_event_error">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<ul>
<li><code>exception</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p>The <code>'error'</code> event is emitted whenever any error occurs. The event handler
function is passed a single <code>Error</code> object.</p>
<h3>Event: 'listening'<span><a class="mark" href="#dgram_event_listening" id="dgram_event_listening">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<p>The <code>'listening'</code> event is emitted whenever a socket begins listening for
datagram messages. This occurs as soon as UDP sockets are created.</p>
<h3>Event: 'message'<span><a class="mark" href="#dgram_event_message" id="dgram_event_message">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<p>The <code>'message'</code> event is emitted when a new datagram is available on a socket.
The event handler function is passed two arguments: <code>msg</code> and <code>rinfo</code>.</p>
<ul>
<li><code>msg</code> <a href="https://nodejs.org/api/buffer.html#buffer_class_buffer" class="type">&lt;Buffer&gt;</a> The message.</li>
<li>
<p><code>rinfo</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a> Remote address information.</p>
<ul>
<li><code>address</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> The sender address.</li>
<li><code>family</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> The address family (<code>'IPv4'</code> or <code>'IPv6'</code>).</li>
<li><code>port</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;number&gt;</a> The sender port.</li>
<li><code>size</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;number&gt;</a> The message size.</li>
</ul>
</li>
</ul>
<h3>socket.addMembership(multicastAddress[, multicastInterface])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L796">[src]</a><span><a class="mark" href="#dgram_socket_addmembership_multicastaddress_multicastinterface" id="dgram_socket_addmembership_multicastaddress_multicastinterface">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.6.9</span>
</div>
<ul>
<li><code>multicastAddress</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
<li><code>multicastInterface</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
</ul>
<p>Tells the kernel to join a multicast group at the given <code>multicastAddress</code> and
<code>multicastInterface</code> using the <code>IP_ADD_MEMBERSHIP</code> socket option. If the
<code>multicastInterface</code> argument is not specified, the operating system will choose
one interface and will add membership to it. To add membership to every
available interface, call <code>addMembership</code> multiple times, once per interface.</p>
<p>When sharing a UDP socket across multiple <code>cluster</code> workers, the
<code>socket.addMembership()</code> function must be called only once or an
<code>EADDRINUSE</code> error will occur:</p>
<pre><code class="language-js">const cluster = require('cluster');
const dgram = require('dgram');
if (cluster.isMaster) {
  cluster.fork(); // Works ok.
  cluster.fork(); // Fails with EADDRINUSE.
} else {
  const s = dgram.createSocket('udp4');
  s.bind(1234, () =&gt; {
    s.addMembership('224.0.0.114');
  });
}
</code></pre>
<h3>socket.address()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L716">[src]</a><span><a class="mark" href="#dgram_socket_address" id="dgram_socket_address">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<ul>
<li>Returns: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a></li>
</ul>
<p>Returns an object containing the address information for a socket.
For UDP sockets, this object will contain <code>address</code>, <code>family</code> and <code>port</code>
properties.</p>
<h3>socket.bind([port][, address][, callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L203">[src]</a><span><a class="mark" href="#dgram_socket_bind_port_address_callback" id="dgram_socket_bind_port_address_callback">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<ul>
<li><code>port</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
<li><code>address</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> with no parameters. Called when binding is complete.</li>
</ul>
<p>For UDP sockets, causes the <code>dgram.Socket</code> to listen for datagram
messages on a named <code>port</code> and optional <code>address</code>. If <code>port</code> is not
specified or is <code>0</code>, the operating system will attempt to bind to a
random port. If <code>address</code> is not specified, the operating system will
attempt to listen on all addresses. Once binding is complete, a
<code>'listening'</code> event is emitted and the optional <code>callback</code> function is
called.</p>
<p>Specifying both a <code>'listening'</code> event listener and passing a
<code>callback</code> to the <code>socket.bind()</code> method is not harmful but not very
useful.</p>
<p>A bound datagram socket keeps the Node.js process running to receive
datagram messages.</p>
<p>If binding fails, an <code>'error'</code> event is generated. In rare case (e.g.
attempting to bind with a closed socket), an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> may be thrown.</p>
<p>Example of a UDP server listening on port 41234:</p>
<pre><code class="language-js">const dgram = require('dgram');
const server = dgram.createSocket('udp4');

server.on('error', (err) =&gt; {
  console.log(`server error:\n${err.stack}`);
  server.close();
});

server.on('message', (msg, rinfo) =&gt; {
  console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
});

server.on('listening', () =&gt; {
  const address = server.address();
  console.log(`server listening ${address.address}:${address.port}`);
});

server.bind(41234);
// Prints: server listening 0.0.0.0:41234
</code></pre>
<h3>socket.bind(options[, callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L203">[src]</a><span><a class="mark" href="#dgram_socket_bind_options_callback" id="dgram_socket_bind_options_callback">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.11.14</span>
</div>
<ul>
<li>
<p><code>options</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a> Required. Supports the following properties:</p>
<ul>
<li><code>port</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
<li><code>address</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
<li><code>exclusive</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type">&lt;boolean&gt;</a></li>
<li><code>fd</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
</ul>
</li>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a></li>
</ul>
<p>For UDP sockets, causes the <code>dgram.Socket</code> to listen for datagram
messages on a named <code>port</code> and optional <code>address</code> that are passed as
properties of an <code>options</code> object passed as the first argument. If
<code>port</code> is not specified or is <code>0</code>, the operating system will attempt
to bind to a random port. If <code>address</code> is not specified, the operating
system will attempt to listen on all addresses. Once binding is
complete, a <code>'listening'</code> event is emitted and the optional <code>callback</code>
function is called.</p>
<p>The <code>options</code> object may contain a <code>fd</code> property. When a <code>fd</code> greater
than <code>0</code> is set, it will wrap around an existing socket with the given
file descriptor. In this case, the properties of <code>port</code> and <code>address</code>
will be ignored.</p>
<p>Specifying both a <code>'listening'</code> event listener and passing a
<code>callback</code> to the <code>socket.bind()</code> method is not harmful but not very
useful.</p>
<p>The <code>options</code> object may contain an additional <code>exclusive</code> property that is
used when using <code>dgram.Socket</code> objects with the <a href="https://nodejs.org/api/cluster.html"><code>cluster</code></a> module. When
<code>exclusive</code> is set to <code>false</code> (the default), cluster workers will use the same
underlying socket handle allowing connection handling duties to be shared.
When <code>exclusive</code> is <code>true</code>, however, the handle is not shared and attempted
port sharing results in an error.</p>
<p>A bound datagram socket keeps the Node.js process running to receive
datagram messages.</p>
<p>If binding fails, an <code>'error'</code> event is generated. In rare case (e.g.
attempting to bind with a closed socket), an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> may be thrown.</p>
<p>An example socket listening on an exclusive port is shown below.</p>
<pre><code class="language-js">socket.bind({
  address: 'localhost',
  port: 8000,
  exclusive: true
});
</code></pre>
<h3>socket.close([callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L686">[src]</a><span><a class="mark" href="#dgram_socket_close_callback" id="dgram_socket_close_callback">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<ul>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> Called when the socket has been closed.</li>
</ul>
<p>Close the underlying socket and stop listening for data on it. If a callback is
provided, it is added as a listener for the <a href="#dgram_event_close"><code>'close'</code></a> event.</p>
<h3>socket.connect(port[, address][, callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L348">[src]</a><span><a class="mark" href="#dgram_socket_connect_port_address_callback" id="dgram_socket_connect_port_address_callback">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v12.0.0</span>
</div>
<ul>
<li><code>port</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
<li><code>address</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> Called when the connection is completed or on error.</li>
</ul>
<p>Associates the <code>dgram.Socket</code> to a remote address and port. Every
message sent by this handle is automatically sent to that destination. Also,
the socket will only receive messages from that remote peer.
Trying to call <code>connect()</code> on an already connected socket will result
in an <a href="https://nodejs.org/api/errors.html#errors_err_socket_dgram_is_connected"><code>ERR_SOCKET_DGRAM_IS_CONNECTED</code></a> exception. If <code>address</code> is not
provided, <code>'127.0.0.1'</code> (for <code>udp4</code> sockets) or <code>'::1'</code> (for <code>udp6</code> sockets)
will be used by default. Once the connection is complete, a <code>'connect'</code> event
is emitted and the optional <code>callback</code> function is called. In case of failure,
the <code>callback</code> is called or, failing this, an <code>'error'</code> event is emitted.</p>
<h3>socket.disconnect()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L423">[src]</a><span><a class="mark" href="#dgram_socket_disconnect" id="dgram_socket_disconnect">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v12.0.0</span>
</div>
<p>A synchronous function that disassociates a connected <code>dgram.Socket</code> from
its remote address. Trying to call <code>disconnect()</code> on an already disconnected
socket will result in an <a href="https://nodejs.org/api/errors.html#errors_err_socket_dgram_not_connected"><code>ERR_SOCKET_DGRAM_NOT_CONNECTED</code></a> exception.</p>
<h3>socket.dropMembership(multicastAddress[, multicastInterface])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L812">[src]</a><span><a class="mark" href="#dgram_socket_dropmembership_multicastaddress_multicastinterface" id="dgram_socket_dropmembership_multicastaddress_multicastinterface">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.6.9</span>
</div>
<ul>
<li><code>multicastAddress</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
<li><code>multicastInterface</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
</ul>
<p>Instructs the kernel to leave a multicast group at <code>multicastAddress</code> using the
<code>IP_DROP_MEMBERSHIP</code> socket option. This method is automatically called by the
kernel when the socket is closed or the process terminates, so most apps will
never have reason to call this.</p>
<p>If <code>multicastInterface</code> is not specified, the operating system will attempt to
drop membership on all valid interfaces.</p>
<h3>socket.getRecvBufferSize()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L887">[src]</a><span><a class="mark" href="#dgram_socket_getrecvbuffersize" id="dgram_socket_getrecvbuffersize">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v8.7.0</span>
</div>
<ul>
<li>Returns: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;number&gt;</a> the <code>SO_RCVBUF</code> socket receive buffer size in bytes.</li>
</ul>
<h3>socket.getSendBufferSize()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L892">[src]</a><span><a class="mark" href="#dgram_socket_getsendbuffersize" id="dgram_socket_getsendbuffersize">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v8.7.0</span>
</div>
<ul>
<li>Returns: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;number&gt;</a> the <code>SO_SNDBUF</code> socket send buffer size in bytes.</li>
</ul>
<h3>socket.ref()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L857">[src]</a><span><a class="mark" href="#dgram_socket_ref" id="dgram_socket_ref">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.9.1</span>
</div>
<p>By default, binding a socket will cause it to block the Node.js process from
exiting as long as the socket is open. The <code>socket.unref()</code> method can be used
to exclude the socket from the reference counting that keeps the Node.js
process active. The <code>socket.ref()</code> method adds the socket back to the reference
counting and restores the default behavior.</p>
<p>Calling <code>socket.ref()</code> multiples times will have no additional effect.</p>
<p>The <code>socket.ref()</code> method returns a reference to the socket so calls can be
chained.</p>
<h3>socket.remoteAddress()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L728">[src]</a><span><a class="mark" href="#dgram_socket_remoteaddress" id="dgram_socket_remoteaddress">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v12.0.0</span>
</div>
<ul>
<li>Returns: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a></li>
</ul>
<p>Returns an object containing the <code>address</code>, <code>family</code>, and <code>port</code> of the remote
endpoint. It throws an <a href="https://nodejs.org/api/errors.html#errors_err_socket_dgram_not_connected"><code>ERR_SOCKET_DGRAM_NOT_CONNECTED</code></a> exception if the
socket is not connected.</p>
<h3>socket.send(msg[, offset, length][, port][, address][, callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L546">[src]</a><span><a class="mark" href="#dgram_socket_send_msg_offset_length_port_address_callback" id="dgram_socket_send_msg_offset_length_port_address_callback">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>Added support for sending data on connected sockets.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>The <code>msg</code> parameter can be an <code>Uint8Array</code> now.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>The <code>address</code> parameter is always optional now.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>On success, <code>callback</code> will now be called with an <code>error</code> argument of <code>null</code> rather than <code>0</code>.</p></td></tr>
<tr><td>v5.7.0</td>
<td><p>The <code>msg</code> parameter can be an array now. Also, the <code>offset</code> and <code>length</code> parameters are optional now.</p></td></tr>
<tr><td>v0.1.99</td>
<td><p><span>Added in: v0.1.99</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>msg</code> <a href="https://nodejs.org/api/buffer.html#buffer_class_buffer" class="type">&lt;Buffer&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array" class="type">&lt;Uint8Array&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array" class="type">&lt;Array&gt;</a> Message to be sent.</li>
<li><code>offset</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a> Offset in the buffer where the message starts.</li>
<li><code>length</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a> Number of bytes in the message.</li>
<li><code>port</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a> Destination port.</li>
<li><code>address</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> Destination hostname or IP address.</li>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> Called when the message has been sent.</li>
</ul>
<p>Broadcasts a datagram on the socket.
For connectionless sockets, the destination <code>port</code> and <code>address</code> must be
specified. Connected sockets, on the other hand, will use their associated
remote endpoint, so the <code>port</code> and <code>address</code> arguments must not be set.</p>
<p>The <code>msg</code> argument contains the message to be sent.
Depending on its type, different behavior can apply. If <code>msg</code> is a <code>Buffer</code>
or <code>Uint8Array</code>,
the <code>offset</code> and <code>length</code> specify the offset within the <code>Buffer</code> where the
message begins and the number of bytes in the message, respectively.
If <code>msg</code> is a <code>String</code>, then it is automatically converted to a <code>Buffer</code>
with <code>'utf8'</code> encoding. With messages that
contain multi-byte characters, <code>offset</code> and <code>length</code> will be calculated with
respect to <a href="https://nodejs.org/api/buffer.html#buffer_class_method_buffer_bytelength_string_encoding">byte length</a> and not the character position.
If <code>msg</code> is an array, <code>offset</code> and <code>length</code> must not be specified.</p>
<p>The <code>address</code> argument is a string. If the value of <code>address</code> is a host name,
DNS will be used to resolve the address of the host. If <code>address</code> is not
provided or otherwise falsy, <code>'127.0.0.1'</code> (for <code>udp4</code> sockets) or <code>'::1'</code>
(for <code>udp6</code> sockets) will be used by default.</p>
<p>If the socket has not been previously bound with a call to <code>bind</code>, the socket
is assigned a random port number and is bound to the "all interfaces" address
(<code>'0.0.0.0'</code> for <code>udp4</code> sockets, <code>'::0'</code> for <code>udp6</code> sockets.)</p>
<p>An optional <code>callback</code> function may be specified to as a way of reporting
DNS errors or for determining when it is safe to reuse the <code>buf</code> object.
DNS lookups delay the time to send for at least one tick of the
Node.js event loop.</p>
<p>The only way to know for sure that the datagram has been sent is by using a
<code>callback</code>. If an error occurs and a <code>callback</code> is given, the error will be
passed as the first argument to the <code>callback</code>. If a <code>callback</code> is not given,
the error is emitted as an <code>'error'</code> event on the <code>socket</code> object.</p>
<p>Offset and length are optional but both <em>must</em> be set if either are used.
They are supported only when the first argument is a <code>Buffer</code> or <code>Uint8Array</code>.</p>
<p>Example of sending a UDP packet to a port on <code>localhost</code>;</p>
<pre><code class="language-js">const dgram = require('dgram');
const message = Buffer.from('Some bytes');
const client = dgram.createSocket('udp4');
client.send(message, 41234, 'localhost', (err) =&gt; {
  client.close();
});
</code></pre>
<p>Example of sending a UDP packet composed of multiple buffers to a port on
<code>127.0.0.1</code>;</p>
<pre><code class="language-js">const dgram = require('dgram');
const buf1 = Buffer.from('Some ');
const buf2 = Buffer.from('bytes');
const client = dgram.createSocket('udp4');
client.send([buf1, buf2], 41234, (err) =&gt; {
  client.close();
});
</code></pre>
<p>Sending multiple buffers might be faster or slower depending on the
application and operating system. It is important to run benchmarks to
determine the optimal strategy on a case-by-case basis. Generally speaking,
however, sending multiple buffers is faster.</p>
<p>Example of sending a UDP packet using a socket connected to a port on
<code>localhost</code>:</p>
<pre><code class="language-js">const dgram = require('dgram');
const message = Buffer.from('Some bytes');
const client = dgram.createSocket('udp4');
client.connect(41234, 'localhost', (err) =&gt; {
  client.send(message, (err) =&gt; {
    client.close();
  });
});
</code></pre>
<p><strong>A Note about UDP datagram size</strong></p>
<p>The maximum size of an <code>IPv4/v6</code> datagram depends on the <code>MTU</code>
(<em>Maximum Transmission Unit</em>) and on the <code>Payload Length</code> field size.</p>
<ul>
<li>
<p>The <code>Payload Length</code> field is <code>16 bits</code> wide, which means that a normal
payload exceed 64K octets <em>including</em> the internet header and data
(65,507 bytes = 65,535 − 8 bytes UDP header − 20 bytes IP header);
this is generally true for loopback interfaces, but such long datagram
messages are impractical for most hosts and networks.</p>
</li>
<li>
<p>The <code>MTU</code> is the largest size a given link layer technology can support for
datagram messages. For any link, <code>IPv4</code> mandates a minimum <code>MTU</code> of <code>68</code>
octets, while the recommended <code>MTU</code> for IPv4 is <code>576</code> (typically recommended
as the <code>MTU</code> for dial-up type applications), whether they arrive whole or in
fragments.</p>
<p>For <code>IPv6</code>, the minimum <code>MTU</code> is <code>1280</code> octets, however, the mandatory minimum
fragment reassembly buffer size is <code>1500</code> octets. The value of <code>68</code> octets is
very small, since most current link layer technologies, like Ethernet, have a
minimum <code>MTU</code> of <code>1500</code>.</p>
</li>
</ul>
<p>It is impossible to know in advance the MTU of each link through which
a packet might travel. Sending a datagram greater than the receiver <code>MTU</code> will
not work because the packet will get silently dropped without informing the
source that the data did not reach its intended recipient.</p>
<h3>socket.setBroadcast(flag)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L744">[src]</a><span><a class="mark" href="#dgram_socket_setbroadcast_flag" id="dgram_socket_setbroadcast_flag">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.6.9</span>
</div>
<ul>
<li><code>flag</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type">&lt;boolean&gt;</a></li>
</ul>
<p>Sets or clears the <code>SO_BROADCAST</code> socket option. When set to <code>true</code>, UDP
packets may be sent to a local interface's broadcast address.</p>
<h3>socket.setMulticastInterface(multicastInterface)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L786">[src]</a><span><a class="mark" href="#dgram_socket_setmulticastinterface_multicastinterface" id="dgram_socket_setmulticastinterface_multicastinterface">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v8.6.0</span>
</div>
<ul>
<li><code>multicastInterface</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
</ul>
<p><em>All references to scope in this section are referring to
<a href="https://en.wikipedia.org/wiki/IPv6_address#Scoped_literal_IPv6_addresses">IPv6 Zone Indices</a>, which are defined by <a href="https://tools.ietf.org/html/rfc4007">RFC 4007</a>. In string form, an IP
with a scope index is written as <code>'IP%scope'</code> where scope is an interface name
or interface number.</em></p>
<p>Sets the default outgoing multicast interface of the socket to a chosen
interface or back to system interface selection. The <code>multicastInterface</code> must
be a valid string representation of an IP from the socket's family.</p>
<p>For IPv4 sockets, this should be the IP configured for the desired physical
interface. All packets sent to multicast on the socket will be sent on the
interface determined by the most recent successful use of this call.</p>
<p>For IPv6 sockets, <code>multicastInterface</code> should include a scope to indicate the
interface as in the examples that follow. In IPv6, individual <code>send</code> calls can
also use explicit scope in addresses, so only packets sent to a multicast
address without specifying an explicit scope are affected by the most recent
successful use of this call.</p>
<h4>Examples: IPv6 Outgoing Multicast Interface<span><a class="mark" href="#dgram_examples_ipv6_outgoing_multicast_interface" id="dgram_examples_ipv6_outgoing_multicast_interface">#</a></span></h4>
<p>On most systems, where scope format uses the interface name:</p>
<pre><code class="language-js">const socket = dgram.createSocket('udp6');

socket.bind(1234, () =&gt; {
  socket.setMulticastInterface('::%eth1');
});
</code></pre>
<p>On Windows, where scope format uses an interface number:</p>
<pre><code class="language-js">const socket = dgram.createSocket('udp6');

socket.bind(1234, () =&gt; {
  socket.setMulticastInterface('::%2');
});
</code></pre>
<h4>Example: IPv4 Outgoing Multicast Interface<span><a class="mark" href="#dgram_example_ipv4_outgoing_multicast_interface" id="dgram_example_ipv4_outgoing_multicast_interface">#</a></span></h4>
<p>All systems use an IP of the host on the desired physical interface:</p>
<pre><code class="language-js">const socket = dgram.createSocket('udp4');

socket.bind(1234, () =&gt; {
  socket.setMulticastInterface('10.0.0.2');
});
</code></pre>
<h4>Call Results<span><a class="mark" href="#dgram_call_results" id="dgram_call_results">#</a></span></h4>
<p>A call on a socket that is not ready to send or no longer open may throw a <em>Not
running</em> <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a>.</p>
<p>If <code>multicastInterface</code> can not be parsed into an IP then an <em>EINVAL</em>
<a href="https://nodejs.org/api/errors.html#errors_class_systemerror"><code>System Error</code></a> is thrown.</p>
<p>On IPv4, if <code>multicastInterface</code> is a valid address but does not match any
interface, or if the address does not match the family then
a <a href="https://nodejs.org/api/errors.html#errors_class_systemerror"><code>System Error</code></a> such as <code>EADDRNOTAVAIL</code> or <code>EPROTONOSUP</code> is thrown.</p>
<p>On IPv6, most errors with specifying or omitting scope will result in the socket
continuing to use (or returning to) the system's default interface selection.</p>
<p>A socket's address family's ANY address (IPv4 <code>'0.0.0.0'</code> or IPv6 <code>'::'</code>) can be
used to return control of the sockets default outgoing interface to the system
for future multicast packets.</p>
<h3>socket.setMulticastLoopback(flag)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L776">[src]</a><span><a class="mark" href="#dgram_socket_setmulticastloopback_flag" id="dgram_socket_setmulticastloopback_flag">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.3.8</span>
</div>
<ul>
<li><code>flag</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type">&lt;boolean&gt;</a></li>
</ul>
<p>Sets or clears the <code>IP_MULTICAST_LOOP</code> socket option. When set to <code>true</code>,
multicast packets will also be received on the local interface.</p>
<h3>socket.setMulticastTTL(ttl)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L764">[src]</a><span><a class="mark" href="#dgram_socket_setmulticastttl_ttl" id="dgram_socket_setmulticastttl_ttl">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.3.8</span>
</div>
<ul>
<li><code>ttl</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
</ul>
<p>Sets the <code>IP_MULTICAST_TTL</code> socket option. While TTL generally stands for
"Time to Live", in this context it specifies the number of IP hops that a
packet is allowed to travel through, specifically for multicast traffic. Each
router or gateway that forwards a packet decrements the TTL. If the TTL is
decremented to 0 by a router, it will not be forwarded.</p>
<p>The argument passed to <code>socket.setMulticastTTL()</code> is a number of hops
between 0 and 255. The default on most systems is <code>1</code> but can vary.</p>
<h3>socket.setRecvBufferSize(size)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L877">[src]</a><span><a class="mark" href="#dgram_socket_setrecvbuffersize_size" id="dgram_socket_setrecvbuffersize_size">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v8.7.0</span>
</div>
<ul>
<li><code>size</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
</ul>
<p>Sets the <code>SO_RCVBUF</code> socket option. Sets the maximum socket receive buffer
in bytes.</p>
<h3>socket.setSendBufferSize(size)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L882">[src]</a><span><a class="mark" href="#dgram_socket_setsendbuffersize_size" id="dgram_socket_setsendbuffersize_size">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v8.7.0</span>
</div>
<ul>
<li><code>size</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
</ul>
<p>Sets the <code>SO_SNDBUF</code> socket option. Sets the maximum socket send buffer
in bytes.</p>
<h3>socket.setTTL(ttl)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L752">[src]</a><span><a class="mark" href="#dgram_socket_setttl_ttl" id="dgram_socket_setttl_ttl">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.101</span>
</div>
<ul>
<li><code>ttl</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;integer&gt;</a></li>
</ul>
<p>Sets the <code>IP_TTL</code> socket option. While TTL generally stands for "Time to Live",
in this context it specifies the number of IP hops that a packet is allowed to
travel through. Each router or gateway that forwards a packet decrements the
TTL. If the TTL is decremented to 0 by a router, it will not be forwarded.
Changing TTL values is typically done for network probes or when multicasting.</p>
<p>The argument to <code>socket.setTTL()</code> is a number of hops between 1 and 255.
The default on most systems is 64 but can vary.</p>
<h3>socket.unref()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L867">[src]</a><span><a class="mark" href="#dgram_socket_unref" id="dgram_socket_unref">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.9.1</span>
</div>
<p>By default, binding a socket will cause it to block the Node.js process from
exiting as long as the socket is open. The <code>socket.unref()</code> method can be used
to exclude the socket from the reference counting that keeps the Node.js
process active, allowing the process to exit even if the socket is still
listening.</p>
<p>Calling <code>socket.unref()</code> multiple times will have no addition effect.</p>
<p>The <code>socket.unref()</code> method returns a reference to the socket so calls can be
chained.</p>
<h3>Change to asynchronous <code>socket.bind()</code> behavior<span><a class="mark" href="#dgram_change_to_asynchronous_socket_bind_behavior" id="dgram_change_to_asynchronous_socket_bind_behavior">#</a></span></h3>
<p>As of Node.js v0.10, <a href="#dgram_socket_bind_options_callback"><code>dgram.Socket#bind()</code></a> changed to an asynchronous
execution model. Legacy code would use synchronous behavior:</p>
<pre><code class="language-js">const s = dgram.createSocket('udp4');
s.bind(1234);
s.addMembership('224.0.0.114');
</code></pre>
<p>Such legacy code would need to be changed to pass a callback function to the
<a href="#dgram_socket_bind_options_callback"><code>dgram.Socket#bind()</code></a> function:</p>
<pre><code class="language-js">const s = dgram.createSocket('udp4');
s.bind(1234, () =&gt; {
  s.addMembership('224.0.0.114');
});
</code></pre>
<h2><code>dgram</code> module functions<span><a class="mark" href="#dgram_dgram_module_functions" id="dgram_dgram_module_functions">#</a></span></h2>
<h3>dgram.createSocket(options[, callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L128">[src]</a><span><a class="mark" href="#dgram_dgram_createsocket_options_callback" id="dgram_dgram_createsocket_options_callback">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.4.0</td>
<td><p>The <code>ipv6Only</code> option is supported.</p></td></tr>
<tr><td>v8.7.0</td>
<td><p>The <code>recvBufferSize</code> and <code>sendBufferSize</code> options are supported now.</p></td></tr>
<tr><td>v8.6.0</td>
<td><p>The <code>lookup</code> option is supported.</p></td></tr>
<tr><td>v0.11.13</td>
<td><p><span>Added in: v0.11.13</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li>
<p><code>options</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a> Available options are:</p>
<ul>
<li><code>type</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> The family of socket. Must be either <code>'udp4'</code> or <code>'udp6'</code>.
Required.</li>
<li><code>reuseAddr</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type">&lt;boolean&gt;</a> When <code>true</code> <a href="#dgram_socket_bind_port_address_callback"><code>socket.bind()</code></a> will reuse the
address, even if another process has already bound a socket on it.
<strong>Default:</strong> <code>false</code>.</li>
<li><code>ipv6Only</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type">&lt;boolean&gt;</a> Setting <code>ipv6Only</code> to <code>true</code> will
disable dual-stack support, i.e., binding to address <code>::</code> won't make
<code>0.0.0.0</code> be bound. <strong>Default:</strong> <code>false</code>.</li>
<li><code>recvBufferSize</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;number&gt;</a> - Sets the <code>SO_RCVBUF</code> socket value.</li>
<li><code>sendBufferSize</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&lt;number&gt;</a> - Sets the <code>SO_SNDBUF</code> socket value.</li>
<li><code>lookup</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> Custom lookup function. <strong>Default:</strong> <a href="https://nodejs.org/api/dns.html#dns_dns_lookup_hostname_options_callback"><code>dns.lookup()</code></a>.</li>
</ul>
</li>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> Attached as a listener for <code>'message'</code> events. Optional.</li>
<li>Returns: <a href="https://nodejs.org/api/dgram.html#dgram_class_dgram_socket" class="type">&lt;dgram.Socket&gt;</a></li>
</ul>
<p>Creates a <code>dgram.Socket</code> object. Once the socket is created, calling
<a href="#dgram_socket_bind_port_address_callback"><code>socket.bind()</code></a> will instruct the socket to begin listening for datagram
messages. When <code>address</code> and <code>port</code> are not passed to <a href="#dgram_socket_bind_port_address_callback"><code>socket.bind()</code></a> the
method will bind the socket to the "all interfaces" address on a random port
(it does the right thing for both <code>udp4</code> and <code>udp6</code> sockets). The bound address
and port can be retrieved using <a href="#dgram_socket_address"><code>socket.address().address</code></a> and
<a href="#dgram_socket_address"><code>socket.address().port</code></a>.</p>
<h3>dgram.createSocket(type[, callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/dgram.js#L128">[src]</a><span><a class="mark" href="#dgram_dgram_createsocket_type_callback" id="dgram_dgram_createsocket_type_callback">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.99</span>
</div>
<ul>
<li><code>type</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> - Either <code>'udp4'</code> or <code>'udp6'</code>.</li>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> - Attached as a listener to <code>'message'</code> events.</li>
<li>Returns: <a href="https://nodejs.org/api/dgram.html#dgram_class_dgram_socket" class="type">&lt;dgram.Socket&gt;</a></li>
</ul>
<p>Creates a <code>dgram.Socket</code> object of the specified <code>type</code>. The <code>type</code> argument
can be either <code>'udp4'</code> or <code>'udp6'</code>. An optional <code>callback</code> function can be
passed which is added as a listener for <code>'message'</code> events.</p>
<p>Once the socket is created, calling <a href="#dgram_socket_bind_port_address_callback"><code>socket.bind()</code></a> will instruct the
socket to begin listening for datagram messages. When <code>address</code> and <code>port</code> are
not passed to <a href="#dgram_socket_bind_port_address_callback"><code>socket.bind()</code></a> the method will bind the socket to the "all
interfaces" address on a random port (it does the right thing for both <code>udp4</code>
and <code>udp6</code> sockets). The bound address and port can be retrieved using
<a href="#dgram_socket_address"><code>socket.address().address</code></a> and <a href="#dgram_socket_address"><code>socket.address().port</code></a>.</p>
      </div>
    </div>
  </div>
  <script src="data:application/javascript;base64,/*
SHJS - Syntax Highlighting in JavaScript
Copyright (C) 2007, 2008 gnombat@users.sourceforge.net
License: http://shjs.sourceforge.net/doc/gplv3.html
*/

if (! this.sh_languages) {
  this.sh_languages = {};
}
var sh_requests = {};

function sh_isEmailAddress(url) {
  if (/^mailto:/.test(url)) {
    return false;
  }
  return url.indexOf('@') !== -1;
}

function sh_setHref(tags, numTags, inputString) {
  var url = inputString.substring(tags[numTags - 2].pos, tags[numTags - 1].pos);
  if (url.length >= 2 && url.charAt(0) === '<' && url.charAt(url.length - 1) === '>') {
    url = url.substr(1, url.length - 2);
  }
  if (sh_isEmailAddress(url)) {
    url = 'mailto:' + url;
  }
  tags[numTags - 2].node.href = url;
}

/*
Konqueror has a bug where the regular expression /$/g will not match at the end
of a line more than once:

  var regex = /$/g;
  var match;

  var line = '1234567890';
  regex.lastIndex = 10;
  match = regex.exec(line);

  var line2 = 'abcde';
  regex.lastIndex = 5;
  match = regex.exec(line2);  // fails
*/
function sh_konquerorExec(s) {
  var result = [''];
  result.index = s.length;
  result.input = s;
  return result;
}

/**
Highlights all elements containing source code in a text string.  The return
value is an array of objects, each representing an HTML start or end tag.  Each
object has a property named pos, which is an integer representing the text
offset of the tag. Every start tag also has a property named node, which is the
DOM element started by the tag. End tags do not have this property.
@param  inputString  a text string
@param  language  a language definition object
@return  an array of tag objects
*/
function sh_highlightString(inputString, language) {
  if (/Konqueror/.test(navigator.userAgent)) {
    if (! language.konquered) {
      for (var s = 0; s < language.length; s++) {
        for (var p = 0; p < language[s].length; p++) {
          var r = language[s][p][0];
          if (r.source === '$') {
            r.exec = sh_konquerorExec;
          }
        }
      }
      language.konquered = true;
    }
  }

  var a = document.createElement('a');
  var span = document.createElement('span');

  // the result
  var tags = [];
  var numTags = 0;

  // each element is a pattern object from language
  var patternStack = [];

  // the current position within inputString
  var pos = 0;

  // the name of the current style, or null if there is no current style
  var currentStyle = null;

  var output = function(s, style) {
    var length = s.length;
    // this is more than just an optimization - we don't want to output empty <span></span> elements
    if (length === 0) {
      return;
    }
    if (! style) {
      var stackLength = patternStack.length;
      if (stackLength !== 0) {
        var pattern = patternStack[stackLength - 1];
        // check whether this is a state or an environment
        if (! pattern[3]) {
          // it's not a state - it's an environment; use the style for this environment
          style = pattern[1];
        }
      }
    }
    if (currentStyle !== style) {
      if (currentStyle) {
        tags[numTags++] = {pos: pos};
        if (currentStyle === 'sh_url') {
          sh_setHref(tags, numTags, inputString);
        }
      }
      if (style) {
        var clone;
        if (style === 'sh_url') {
          clone = a.cloneNode(false);
        }
        else {
          clone = span.cloneNode(false);
        }
        clone.className = style;
        tags[numTags++] = {node: clone, pos: pos};
      }
    }
    pos += length;
    currentStyle = style;
  };

  var endOfLinePattern = /\r\n|\r|\n/g;
  endOfLinePattern.lastIndex = 0;
  var inputStringLength = inputString.length;
  while (pos < inputStringLength) {
    var start = pos;
    var end;
    var startOfNextLine;
    var endOfLineMatch = endOfLinePattern.exec(inputString);
    if (endOfLineMatch === null) {
      end = inputStringLength;
      startOfNextLine = inputStringLength;
    }
    else {
      end = endOfLineMatch.index;
      startOfNextLine = endOfLinePattern.lastIndex;
    }

    var line = inputString.substring(start, end);

    var matchCache = [];
    for (;;) {
      var posWithinLine = pos - start;

      var stateIndex;
      var stackLength = patternStack.length;
      if (stackLength === 0) {
        stateIndex = 0;
      }
      else {
        // get the next state
        stateIndex = patternStack[stackLength - 1][2];
      }

      var state = language[stateIndex];
      var numPatterns = state.length;
      var mc = matchCache[stateIndex];
      if (! mc) {
        mc = matchCache[stateIndex] = [];
      }
      var bestMatch = null;
      var bestPatternIndex = -1;
      for (var i = 0; i < numPatterns; i++) {
        var match;
        if (i < mc.length && (mc[i] === null || posWithinLine <= mc[i].index)) {
          match = mc[i];
        }
        else {
          var regex = state[i][0];
          regex.lastIndex = posWithinLine;
          match = regex.exec(line);
          mc[i] = match;
        }
        if (match !== null && (bestMatch === null || match.index < bestMatch.index)) {
          bestMatch = match;
          bestPatternIndex = i;
          if (match.index === posWithinLine) {
            break;
          }
        }
      }

      if (bestMatch === null) {
        output(line.substring(posWithinLine), null);
        break;
      }
      else {
        // got a match
        if (bestMatch.index > posWithinLine) {
          output(line.substring(posWithinLine, bestMatch.index), null);
        }

        var pattern = state[bestPatternIndex];

        var newStyle = pattern[1];
        var matchedString;
        if (newStyle instanceof Array) {
          for (var subexpression = 0; subexpression < newStyle.length; subexpression++) {
            matchedString = bestMatch[subexpression + 1];
            output(matchedString, newStyle[subexpression]);
          }
        }
        else {
          matchedString = bestMatch[0];
          output(matchedString, newStyle);
        }

        switch (pattern[2]) {
        case -1:
          // do nothing
          break;
        case -2:
          // exit
          patternStack.pop();
          break;
        case -3:
          // exitall
          patternStack.length = 0;
          break;
        default:
          // this was the start of a delimited pattern or a state/environment
          patternStack.push(pattern);
          break;
        }
      }
    }

    // end of the line
    if (currentStyle) {
      tags[numTags++] = {pos: pos};
      if (currentStyle === 'sh_url') {
        sh_setHref(tags, numTags, inputString);
      }
      currentStyle = null;
    }
    pos = startOfNextLine;
  }

  return tags;
}

////////////////////////////////////////////////////////////////////////////////
// DOM-dependent functions

function sh_getClasses(element) {
  var result = [];
  var htmlClass = element.className;
  if (htmlClass && htmlClass.length > 0) {
    var htmlClasses = htmlClass.split(' ');
    for (var i = 0; i < htmlClasses.length; i++) {
      if (htmlClasses[i].length > 0) {
        result.push(htmlClasses[i]);
      }
    }
  }
  return result;
}

function sh_addClass(element, name) {
  var htmlClasses = sh_getClasses(element);
  for (var i = 0; i < htmlClasses.length; i++) {
    if (name.toLowerCase() === htmlClasses[i].toLowerCase()) {
      return;
    }
  }
  htmlClasses.push(name);
  element.className = htmlClasses.join(' ');
}

/**
Extracts the tags from an HTML DOM NodeList.
@param  nodeList  a DOM NodeList
@param  result  an object with text, tags and pos properties
*/
function sh_extractTagsFromNodeList(nodeList, result) {
  var length = nodeList.length;
  for (var i = 0; i < length; i++) {
    var node = nodeList.item(i);
    switch (node.nodeType) {
    case 1:
      if (node.nodeName.toLowerCase() === 'br') {
        var terminator;
        if (/MSIE/.test(navigator.userAgent)) {
          terminator = '\r';
        }
        else {
          terminator = '\n';
        }
        result.text.push(terminator);
        result.pos++;
      }
      else {
        result.tags.push({node: node.cloneNode(false), pos: result.pos});
        sh_extractTagsFromNodeList(node.childNodes, result);
        result.tags.push({pos: result.pos});
      }
      break;
    case 3:
    case 4:
      result.text.push(node.data);
      result.pos += node.length;
      break;
    }
  }
}

/**
Extracts the tags from the text of an HTML element. The extracted tags will be
returned as an array of tag objects. See sh_highlightString for the format of
the tag objects.
@param  element  a DOM element
@param  tags  an empty array; the extracted tag objects will be returned in it
@return  the text of the element
@see  sh_highlightString
*/
function sh_extractTags(element, tags) {
  var result = {};
  result.text = [];
  result.tags = tags;
  result.pos = 0;
  sh_extractTagsFromNodeList(element.childNodes, result);
  return result.text.join('');
}

/**
Merges the original tags from an element with the tags produced by highlighting.
@param  originalTags  an array containing the original tags
@param  highlightTags  an array containing the highlighting tags - these must not overlap
@result  an array containing the merged tags
*/
function sh_mergeTags(originalTags, highlightTags) {
  var numOriginalTags = originalTags.length;
  if (numOriginalTags === 0) {
    return highlightTags;
  }

  var numHighlightTags = highlightTags.length;
  if (numHighlightTags === 0) {
    return originalTags;
  }

  var result = [];
  var originalIndex = 0;
  var highlightIndex = 0;

  while (originalIndex < numOriginalTags && highlightIndex < numHighlightTags) {
    var originalTag = originalTags[originalIndex];
    var highlightTag = highlightTags[highlightIndex];

    if (originalTag.pos <= highlightTag.pos) {
      result.push(originalTag);
      originalIndex++;
    }
    else {
      result.push(highlightTag);
      if (highlightTags[highlightIndex + 1].pos <= originalTag.pos) {
        highlightIndex++;
        result.push(highlightTags[highlightIndex]);
        highlightIndex++;
      }
      else {
        // new end tag
        result.push({pos: originalTag.pos});

        // new start tag
        highlightTags[highlightIndex] = {node: highlightTag.node.cloneNode(false), pos: originalTag.pos};
      }
    }
  }

  while (originalIndex < numOriginalTags) {
    result.push(originalTags[originalIndex]);
    originalIndex++;
  }

  while (highlightIndex < numHighlightTags) {
    result.push(highlightTags[highlightIndex]);
    highlightIndex++;
  }

  return result;
}

/**
Inserts tags into text.
@param  tags  an array of tag objects
@param  text  a string representing the text
@return  a DOM DocumentFragment representing the resulting HTML
*/
function sh_insertTags(tags, text) {
  var doc = document;

  var result = document.createDocumentFragment();
  var tagIndex = 0;
  var numTags = tags.length;
  var textPos = 0;
  var textLength = text.length;
  var currentNode = result;

  // output one tag or text node every iteration
  while (textPos < textLength || tagIndex < numTags) {
    var tag;
    var tagPos;
    if (tagIndex < numTags) {
      tag = tags[tagIndex];
      tagPos = tag.pos;
    }
    else {
      tagPos = textLength;
    }

    if (tagPos <= textPos) {
      // output the tag
      if (tag.node) {
        // start tag
        var newNode = tag.node;
        currentNode.appendChild(newNode);
        currentNode = newNode;
      }
      else {
        // end tag
        currentNode = currentNode.parentNode;
      }
      tagIndex++;
    }
    else {
      // output text
      currentNode.appendChild(doc.createTextNode(text.substring(textPos, tagPos)));
      textPos = tagPos;
    }
  }

  return result;
}

/**
Highlights an element containing source code.  Upon completion of this function,
the element will have been placed in the "sh_sourceCode" class.
@param  element  a DOM <pre> element containing the source code to be highlighted
@param  language  a language definition object
*/
function sh_highlightElement(element, language) {
  sh_addClass(element, 'sh_sourceCode');
  var originalTags = [];
  var inputString = sh_extractTags(element, originalTags);
  var highlightTags = sh_highlightString(inputString, language);
  var tags = sh_mergeTags(originalTags, highlightTags);
  var documentFragment = sh_insertTags(tags, inputString);
  while (element.hasChildNodes()) {
    element.removeChild(element.firstChild);
  }
  element.appendChild(documentFragment);
}

function sh_getXMLHttpRequest() {
  if (window.ActiveXObject) {
    return new ActiveXObject('Msxml2.XMLHTTP');
  }
  else if (window.XMLHttpRequest) {
    return new XMLHttpRequest();
  }
  throw 'No XMLHttpRequest implementation available';
}

function sh_load(language, element, prefix, suffix) {
  if (language in sh_requests) {
    sh_requests[language].push(element);
    return;
  }
  sh_requests[language] = [element];
  var request = sh_getXMLHttpRequest();
  var url = prefix + 'sh_' + language + suffix;
  request.open('GET', url, true);
  request.onreadystatechange = function () {
    if (request.readyState === 4) {
      try {
        if (! request.status || request.status === 200) {
          eval(request.responseText);
          var elements = sh_requests[language];
          for (var i = 0; i < elements.length; i++) {
            sh_highlightElement(elements[i], sh_languages[language]);
          }
        }
        else {
          throw 'HTTP error: status ' + request.status;
        }
      }
      finally {
        request = null;
      }
    }
  };
  request.send(null);
}

/**
Highlights all elements containing source code on the current page. Elements
containing source code must be "pre" elements with a "class" attribute of
"sh_LANGUAGE", where LANGUAGE is a valid language identifier; e.g., "sh_java"
identifies the element as containing "java" language source code.
*/
function highlight(prefix, suffix, tag) {
  var nodeList = document.getElementsByTagName(tag);
  for (var i = 0; i < nodeList.length; i++) {
    var element = nodeList.item(i);
    var htmlClasses = sh_getClasses(element);
    var highlighted = false;
    var donthighlight = false;
    for (var j = 0; j < htmlClasses.length; j++) {
      var htmlClass = htmlClasses[j].toLowerCase();
      if (htmlClass === 'sh_none') {
        donthighlight = true
        continue;
      }
      if (htmlClass.substr(0, 3) === 'sh_') {
        var language = htmlClass.substring(3);
        if (language in sh_languages) {
          sh_highlightElement(element, sh_languages[language]);
          highlighted = true;
        }
        else if (typeof(prefix) === 'string' && typeof(suffix) === 'string') {
          sh_load(language, element, prefix, suffix);
        }
        else {
          throw 'Found <' + tag + '> element with class="' + htmlClass + '", but no such language exists';
        }
        break;
      }
    }
    if (highlighted === false && donthighlight == false) {
      sh_highlightElement(element, sh_languages["javascript"]);
    }
  }
}



function sh_highlightDocument(prefix, suffix) {
  highlight(prefix, suffix, 'tt');
  highlight(prefix, suffix, 'code');
  highlight(prefix, suffix, 'pre');
}
"></script>
  <script src="data:application/javascript;base64,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"></script>
  <script>highlight(undefined, undefined, 'pre');</script>


</body></html>