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+</head>
+<body class="article">
+<div id="header">
+<h1><a href="index.html">Getting Started with 'nanomsg'</a></h1>
+</div>
+<div id="content">
+<div id="preamble">
+<div class="sectionbody">
+<div class="admonitionblock note">
+<table>
+<tr>
+<td class="icon">
+<i class="fa icon-note" title="Note"></i>
+</td>
+<td class="content">
+This document is derived from an original post by Tim Dysinger.
+That post is no longer available, but we have modified and restructured it,
+as well as making enhancments and corrections.
+Tim&#8217;s original code is on <a href="https://github.com/dysinger/nanomsg-examples">github</a>, but we recommend using the examples here as they have a number of corrections.
+</td>
+</tr>
+</table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_bus_routing">Bus (Routing)</h2>
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="bus.png" alt="A Simple Bus">
+</div>
+</div>
+<div class="paragraph">
+<p>The bus protocol is useful for routing applications, or for building
+fully interconnected mesh networks.  In this pattern, messages are
+sent to every directly connected peer.</p>
+</div>
+<div class="listingblock">
+<div class="title">bus.c</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;stdlib.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;string.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;unistd.h&gt;</span>
+
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/bus.h&gt;</span>
+
+<span class="directive">void</span>
+fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func)
+{
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, func, nn_strerror(nn_errno()));
+        exit(<span class="integer">1</span>);
+}
+
+<span class="predefined-type">int</span>
+node(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
+{
+        <span class="predefined-type">int</span> sock;
+
+        <span class="keyword">if</span> ((sock = nn_socket (AF_SP, NN_BUS)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+          <span class="keyword">if</span> (nn_bind(sock, argv[<span class="integer">2</span>]) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_bind</span><span class="delimiter">&quot;</span></span>);
+        }
+
+        sleep(<span class="integer">1</span>); <span class="comment">// wait for peers to bind</span>
+        <span class="keyword">if</span> (argc &gt;= <span class="integer">3</span>) {
+                <span class="keyword">for</span> (<span class="predefined-type">int</span> x = <span class="integer">3</span>; x &lt; argc; x++) {
+                        <span class="keyword">if</span> (nn_connect(sock, argv[x]) &lt; <span class="integer">0</span>) {
+                                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_connect</span><span class="delimiter">&quot;</span></span>);
+                        }
+                }
+        }
+        sleep(<span class="integer">1</span>); <span class="comment">// wait for connections</span>
+        <span class="predefined-type">int</span> to = <span class="integer">100</span>;
+        <span class="keyword">if</span> (nn_setsockopt(sock, NN_SOL_SOCKET, NN_RCVTIMEO, &amp;to,
+            <span class="keyword">sizeof</span> (to)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_setsockopt</span><span class="delimiter">&quot;</span></span>);
+        }
+
+        <span class="comment">// SEND</span>
+        <span class="predefined-type">int</span> sz_n = strlen(argv[<span class="integer">1</span>]) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: SENDING '%s' ONTO BUS</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, argv[<span class="integer">1</span>], argv[<span class="integer">1</span>]);
+        <span class="keyword">if</span> (nn_send(sock, argv[<span class="integer">1</span>], sz_n, <span class="integer">0</span>) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_send</span><span class="delimiter">&quot;</span></span>);
+        }
+
+        <span class="comment">// RECV</span>
+        <span class="keyword">for</span> (;;) {
+                <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+                <span class="predefined-type">int</span> recv = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
+                <span class="keyword">if</span> (recv &gt;= <span class="integer">0</span>) {
+                        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: RECEIVED '%s' FROM BUS</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, argv[<span class="integer">1</span>], buf); <i class="conum" data-value="1"></i><b>(1)</b>
+                        nn_freemsg(buf);
+                }
+        }
+        <span class="keyword">return</span> (nn_shutdown(sock, <span class="integer">0</span>));
+}
+
+<span class="predefined-type">int</span>
+main(<span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
+{
+        <span class="keyword">if</span> (argc &gt;= <span class="integer">3</span>) {
+                <span class="keyword">return</span> (node(argc, argv));
+        }
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: bus &lt;NODE_NAME&gt; &lt;URL&gt; &lt;URL&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>);
+        <span class="keyword">return</span> <span class="integer">1</span>;
+}</code></pre>
+</div>
+</div>
+<div class="colist arabic">
+<table>
+<tr>
+<td><i class="conum" data-value="1"></i><b>1</b></td>
+<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td>
+</tr>
+</table>
+</div>
+<div class="listingblock">
+<div class="title">Compilation</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">gcc bus.c -lnanomsg.a -o bus</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Execution</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">./bus node0 ipc:///tmp/node0.ipc ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc &amp; node0=$!
+./bus node1 ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc &amp; node1=$!
+./bus node2 ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc &amp; node2=$!
+./bus node3 ipc:///tmp/node3.ipc ipc:///tmp/node0.ipc &amp; node3=$!
+sleep 5
+kill $node0 $node1 $node2 $node3</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Output</div>
+<div class="content">
+<pre>node0: SENDING 'node0' ONTO BUS
+node1: SENDING 'node1' ONTO BUS
+node2: SENDING 'node2' ONTO BUS
+node3: SENDING 'node3' ONTO BUS
+node0: RECEIVED 'node1' FROM BUS
+node0: RECEIVED 'node2' FROM BUS
+node0: RECEIVED 'node3' FROM BUS
+node1: RECEIVED 'node0' FROM BUS
+node1: RECEIVED 'node2' FROM BUS
+node1: RECEIVED 'node3' FROM BUS
+node2: RECEIVED 'node0' FROM BUS
+node2: RECEIVED 'node1' FROM BUS
+node2: RECEIVED 'node3' FROM BUS
+node3: RECEIVED 'node0' FROM BUS
+node3: RECEIVED 'node1' FROM BUS
+node3: RECEIVED 'node2' FROM BUS</pre>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2018-01-09 01:08:26 UTC
+</div>
+</div>
+</body>
+</html>
diff --git a/gettingstarted/index.html b/gettingstarted/index.html
index b04cfa8..fcc7978 100644
--- a/gettingstarted/index.html
+++ b/gettingstarted/index.html
@@ -522,7 +522,7 @@
 </head>
 <body class="article">
 <div id="header">
-<h1>Getting Started with 'nanomsg'</h1>
+<h1><a href="#">Getting Started with 'nanomsg'</a></h1>
 </div>
 <div id="content">
 <div id="preamble">
@@ -534,617 +534,55 @@
 <i class="fa icon-note" title="Note"></i>
 </td>
 <td class="content">
-This document is taken from an original post by Tim Dysinger.
-That post is no longer available, but we have modified it from HTML
-and posted it here for your enjoyment.
+This document is derived from an original post by Tim Dysinger.
+That post is no longer available, but we have modified and restructured it,
+as well as making enhancments and corrections.
+Tim&#8217;s original code is on <a href="https://github.com/dysinger/nanomsg-examples">github</a>, but we recommend using the examples here as they have a number of corrections.
 </td>
 </tr>
 </table>
 </div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_messaging_patterns">Messaging Patterns</h2>
+<div class="sectionbody">
 <div class="paragraph">
-<p>Posted on September 16, 2013 by [Tim Dysinger](<a href="https://github.com/dysinger/nanomsg-examples" class="bare">https://github.com/dysinger/nanomsg-examples</a>)</p>
+<p><a href="http://nanomsg.org">Nanomsg</a> is a messaging framework that attempts to
+help solve common messaging problems with one of a few patterns ('protocols'
+in nanomsg parlance.)</p>
 </div>
 <div class="paragraph">
-<p>I played around with <a href="http://nanomsg.org/">nanomsg</a>. It’s natural to describe it as a mini-zeromq in C. The following are my examples of each pattern type in C. Error handling and such has been left out for brevity.</p>
+<p>Following are examples of each pattern type in C.</p>
 </div>
-<div class="paragraph">
-<p>The code is on <a href="https://github.com/dysinger/nanomsg-examples">github as well</a>, but may be more out of date.</p>
-</div>
-</div>
-</div>
-<div class="sect1">
-<h2 id="_pipeline_a_one_way_pipe">Pipeline (A One-Way Pipe)</h2>
-<div class="sectionbody">
-<div class="imageblock">
-<div class="content">
-<img src="pipeline.png" alt="A One-Way Pipe">
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="C"><span class="preprocessor">#include</span> <span class="include">&lt;assert.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;libc.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/pipeline.h&gt;</span>
-
-<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">&quot;</span><span class="content">node0</span><span class="delimiter">&quot;</span></span>
-<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">&quot;</span><span class="content">node1</span><span class="delimiter">&quot;</span></span>
-
-<span class="predefined-type">int</span> node0 (<span class="directive">const</span> <span class="predefined-type">char</span> *url)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_PULL);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_bind (sock, url) &gt;= <span class="integer">0</span>);
-  <span class="keyword">while</span> (<span class="integer">1</span>)
-    {
-      <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
-      <span class="predefined-type">int</span> bytes = nn_recv (sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
-      assert (bytes &gt;= <span class="integer">0</span>);
-      printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE0: RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, buf);
-      nn_freemsg (buf);
-    }
-}
-
-<span class="predefined-type">int</span> node1 (<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *msg)
-{
-  <span class="predefined-type">int</span> sz_msg = strlen (msg) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_PUSH);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_connect (sock, url) &gt;= <span class="integer">0</span>);
-  printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE1: SENDING </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, msg);
-  <span class="predefined-type">int</span> bytes = nn_send (sock, msg, sz_msg, <span class="integer">0</span>);
-  assert (bytes == sz_msg);
-  sleep(<span class="integer">1</span>); <span class="comment">// wait for messages to flush before shutting down</span>
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> main (<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
-{
-  <span class="keyword">if</span> (strncmp (NODE0, argv[<span class="integer">1</span>], strlen (NODE0)) == <span class="integer">0</span> &amp;&amp; argc &gt; <span class="integer">1</span>)
-    <span class="keyword">return</span> node0 (argv[<span class="integer">2</span>]);
-  <span class="keyword">else</span> <span class="keyword">if</span> (strncmp (NODE1, argv[<span class="integer">1</span>], strlen (NODE1)) == <span class="integer">0</span> &amp;&amp; argc &gt; <span class="integer">2</span>)
-    <span class="keyword">return</span> node1 (argv[<span class="integer">2</span>], argv[<span class="integer">3</span>]);
-  <span class="keyword">else</span>
-    {
-      fprintf (stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: pipeline %s|%s &lt;URL&gt; &lt;ARG&gt; ...'</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
-               NODE0, NODE1);
-      <span class="keyword">return</span> <span class="integer">1</span>;
-    }
-}</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="bash">gcc pipeline.c /usr/local/lib/libnanomsg.a -o pipeline
-./pipeline node0 ipc:///tmp/pipeline.ipc &amp; node0=$! &amp;&amp; sleep 1
-./pipeline node1 ipc:///tmp/pipeline.ipc &quot;Hello, World!&quot;
-./pipeline node1 ipc:///tmp/pipeline.ipc &quot;Goodbye.&quot;
-kill $node0</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre>NODE1: SENDING "Hello, World!"
-NODE0: RECEIVED "Hello, World!"
-NODE1: SENDING "Goodbye."
-NODE0: RECEIVED "Goodbye."</pre>
-</div>
-</div>
-</div>
-</div>
-<div class="sect1">
-<h2 id="_request_reply_i_ask_you_answer">Request/Reply (I ask, you answer)</h2>
-<div class="sectionbody">
-<div class="imageblock">
-<div class="content">
-<img src="reqrep.png" alt="I ask" width="you answer">
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;assert.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;libc.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/pipeline.h&gt;</span>
-
-<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">&quot;</span><span class="content">node0</span><span class="delimiter">&quot;</span></span>
-<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">&quot;</span><span class="content">node1</span><span class="delimiter">&quot;</span></span>
-
-<span class="predefined-type">int</span> node0 (<span class="directive">const</span> <span class="predefined-type">char</span> *url)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_PULL);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_bind (sock, url) &gt;= <span class="integer">0</span>);
-  <span class="keyword">while</span> (<span class="integer">1</span>)
-    {
-      <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
-      <span class="predefined-type">int</span> bytes = nn_recv (sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
-      assert (bytes &gt;= <span class="integer">0</span>);
-      printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE0: RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, buf);
-      nn_freemsg (buf);
-    }
-}
-
-<span class="predefined-type">int</span> node1 (<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *msg)
-{
-  <span class="predefined-type">int</span> sz_msg = strlen (msg) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_PUSH);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_connect (sock, url) &gt;= <span class="integer">0</span>);
-  printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE1: SENDING </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, msg);
-  <span class="predefined-type">int</span> bytes = nn_send (sock, msg, sz_msg, <span class="integer">0</span>);
-  assert (bytes == sz_msg);
-  sleep(<span class="integer">1</span>); <span class="comment">// wait for messages to flush before shutting down</span>
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> main (<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
-{
-  <span class="keyword">if</span> (strncmp (NODE0, argv[<span class="integer">1</span>], strlen (NODE0)) == <span class="integer">0</span> &amp;&amp; argc &gt; <span class="integer">1</span>)
-    <span class="keyword">return</span> node0 (argv[<span class="integer">2</span>]);
-  <span class="keyword">else</span> <span class="keyword">if</span> (strncmp (NODE1, argv[<span class="integer">1</span>], strlen (NODE1)) == <span class="integer">0</span> &amp;&amp; argc &gt; <span class="integer">2</span>)
-    <span class="keyword">return</span> node1 (argv[<span class="integer">2</span>], argv[<span class="integer">3</span>]);
-  <span class="keyword">else</span>
-    {
-      fprintf (stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: pipeline %s|%s &lt;URL&gt; &lt;ARG&gt; ...'</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
-               NODE0, NODE1);
-      <span class="keyword">return</span> <span class="integer">1</span>;
-    }
-}</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="bash">gcc reqrep.c /usr/local/lib/libnanomsg.a -o reqrep
-./reqrep node0 ipc:///tmp/reqrep.ipc &amp; node0=$! &amp;&amp; sleep 1
-./reqrep node1 ipc:///tmp/reqrep.ipc
-kill $node0</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre>NODE1: SENDING DATE REQUEST DATE
-NODE0: RECEIVED DATE REQUEST
-NODE0: SENDING DATE Sat Sep  7 17:39:01 2013
-NODE1: RECEIVED DATE Sat Sep  7 17:39:01 2013</pre>
-</div>
-</div>
-</div>
-</div>
-<div class="sect1">
-<h2 id="_pair_two_way_radio">Pair (Two Way Radio)</h2>
-<div class="sectionbody">
-<div class="imageblock">
-<div class="content">
-<img src="pair.png" alt="Two Way Radio">
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;assert.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;libc.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/pair.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
-
-<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">&quot;</span><span class="content">node0</span><span class="delimiter">&quot;</span></span>
-<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">&quot;</span><span class="content">node1</span><span class="delimiter">&quot;</span></span>
-
-<span class="predefined-type">int</span> send_name(<span class="predefined-type">int</span> sock, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
-{
-  printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: SENDING </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name, name);
-  <span class="predefined-type">int</span> sz_n = strlen (name) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
-  <span class="keyword">return</span> nn_send (sock, name, sz_n, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> recv_name(<span class="predefined-type">int</span> sock, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
-{
-  <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
-  <span class="predefined-type">int</span> result = nn_recv (sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
-  <span class="keyword">if</span> (result &gt; <span class="integer">0</span>)
-    {
-      printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name, buf);
-      nn_freemsg (buf);
-    }
-  <span class="keyword">return</span> result;
-}
-
-<span class="predefined-type">int</span> send_recv(<span class="predefined-type">int</span> sock, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
-{
-  <span class="predefined-type">int</span> to = <span class="integer">100</span>;
-  assert (nn_setsockopt (sock, NN_SOL_SOCKET, NN_RCVTIMEO, &amp;to, <span class="keyword">sizeof</span> (to)) &gt;= <span class="integer">0</span>);
-  <span class="keyword">while</span>(<span class="integer">1</span>)
-    {
-      recv_name(sock, name);
-      sleep(<span class="integer">1</span>);
-      send_name(sock, name);
-    }
-}
-
-<span class="predefined-type">int</span> node0 (<span class="directive">const</span> <span class="predefined-type">char</span> *url)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_PAIR);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_bind (sock, url) &gt;= <span class="integer">0</span>);
-  send_recv(sock, NODE0);
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> node1 (<span class="directive">const</span> <span class="predefined-type">char</span> *url)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_PAIR);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_connect (sock, url) &gt;= <span class="integer">0</span>);
-  send_recv(sock, NODE1);
-  sleep(<span class="integer">1</span>); <span class="comment">// wait for messages to flush before shutting down</span>
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> main (<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
-{
-  <span class="keyword">if</span> (strncmp (NODE0, argv[<span class="integer">1</span>], strlen (NODE0)) == <span class="integer">0</span> &amp;&amp; argc &gt; <span class="integer">1</span>)
-    <span class="keyword">return</span> node0 (argv[<span class="integer">2</span>]);
-  <span class="keyword">else</span> <span class="keyword">if</span> (strncmp (NODE1, argv[<span class="integer">1</span>], strlen (NODE1)) == <span class="integer">0</span> &amp;&amp; argc &gt; <span class="integer">1</span>)
-    <span class="keyword">return</span> node1 (argv[<span class="integer">2</span>]);
-  <span class="keyword">else</span>
-    {
-      fprintf (stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: pair %s|%s &lt;URL&gt; &lt;ARG&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
-               NODE0, NODE1);
-      <span class="keyword">return</span> <span class="integer">1</span>;
-    }
-}</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="bash">gcc pair.c /usr/local/lib/libnanomsg.a -o pair
-./pair node0 ipc:///tmp/pair.ipc &amp; node0=$!
-./pair node1 ipc:///tmp/pair.ipc &amp; node1=$!
-sleep 3
-kill $node0 $node1</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre>NODE1: SENDING DATE REQUEST DATE
-NODE0: RECEIVED DATE REQUEST
-NODE0: SENDING DATE Sat Sep  7 17:39:01 2013
-NODE1: RECEIVED DATE Sat Sep  7 17:39:01 2013</pre>
-</div>
-</div>
-</div>
-</div>
-<div class="sect1">
-<h2 id="_pub_sub_topics_broadcast">Pub/Sub (Topics &amp; Broadcast)</h2>
-<div class="sectionbody">
-<div class="imageblock">
-<div class="content">
-<img src="pubsub.png" alt="Topics &amp; Broadcast">
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;assert.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;libc.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/pubsub.h&gt;</span>
-
-<span class="preprocessor">#define</span> SERVER <span class="string"><span class="delimiter">&quot;</span><span class="content">server</span><span class="delimiter">&quot;</span></span>
-<span class="preprocessor">#define</span> CLIENT <span class="string"><span class="delimiter">&quot;</span><span class="content">client</span><span class="delimiter">&quot;</span></span>
-
-<span class="predefined-type">char</span> *date ()
-{
-  time_t raw = time (&amp;raw);
-  <span class="keyword">struct</span> tm *info = localtime (&amp;raw);
-  <span class="predefined-type">char</span> *text = asctime (info);
-  text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span>
-  <span class="keyword">return</span> text;
-}
-
-<span class="predefined-type">int</span> server (<span class="directive">const</span> <span class="predefined-type">char</span> *url)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_PUB);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_bind (sock, url) &gt;= <span class="integer">0</span>);
-  <span class="keyword">while</span> (<span class="integer">1</span>)
-    {
-      <span class="predefined-type">char</span> *d = date();
-      <span class="predefined-type">int</span> sz_d = strlen(d) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
-      printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">SERVER: PUBLISHING DATE %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, d);
-      <span class="predefined-type">int</span> bytes = nn_send (sock, d, sz_d, <span class="integer">0</span>);
-      assert (bytes == sz_d);
-      sleep(<span class="integer">1</span>);
-    }
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> client (<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_SUB);
-  assert (sock &gt;= <span class="integer">0</span>);
-  <span class="comment">// TODO learn more about publishing/subscribe keys</span>
-  assert (nn_setsockopt (sock, NN_SUB, NN_SUB_SUBSCRIBE, <span class="string"><span class="delimiter">&quot;</span><span class="delimiter">&quot;</span></span>, <span class="integer">0</span>) &gt;= <span class="integer">0</span>);
-  assert (nn_connect (sock, url) &gt;= <span class="integer">0</span>);
-  <span class="keyword">while</span> (<span class="integer">1</span>)
-    {
-      <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
-      <span class="predefined-type">int</span> bytes = nn_recv (sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
-      assert (bytes &gt;= <span class="integer">0</span>);
-      printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">CLIENT (%s): RECEIVED %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name, buf);
-      nn_freemsg (buf);
-    }
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> main (<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
-{
-  <span class="keyword">if</span> (strncmp (SERVER, argv[<span class="integer">1</span>], strlen (SERVER)) == <span class="integer">0</span> &amp;&amp; argc &gt;= <span class="integer">2</span>)
-    <span class="keyword">return</span> server (argv[<span class="integer">2</span>]);
-  <span class="keyword">else</span> <span class="keyword">if</span> (strncmp (CLIENT, argv[<span class="integer">1</span>], strlen (CLIENT)) == <span class="integer">0</span> &amp;&amp; argc &gt;= <span class="integer">3</span>)
-    <span class="keyword">return</span> client (argv[<span class="integer">2</span>], argv[<span class="integer">3</span>]);
-  <span class="keyword">else</span>
-    {
-      fprintf (stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: pubsub %s|%s &lt;URL&gt; &lt;ARG&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
-               SERVER, CLIENT);
-      <span class="keyword">return</span> <span class="integer">1</span>;
-    }
-}</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="bash">gcc pubsub.c /usr/local/lib/libnanomsg.a -o pubsub
-./pubsub server ipc:///tmp/pubsub.ipc &amp; server=$! &amp;&amp; sleep 1
-./pubsub client ipc:///tmp/pubsub.ipc client0 &amp; client0=$!
-./pubsub client ipc:///tmp/pubsub.ipc client1 &amp; client1=$!
-./pubsub client ipc:///tmp/pubsub.ipc client2 &amp; client2=$!
-sleep 5
-kill $server $client0 $client1 $client2</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre>SERVER: PUBLISHING DATE Sat Sep  7 17:40:11 2013
-SERVER: PUBLISHING DATE Sat Sep  7 17:40:12 2013
-SERVER: PUBLISHING DATE Sat Sep  7 17:40:13 2013
-CLIENT (client2): RECEIVED Sat Sep  7 17:40:13 2013
-CLIENT (client0): RECEIVED Sat Sep  7 17:40:13 2013
-CLIENT (client1): RECEIVED Sat Sep  7 17:40:13 2013
-SERVER: PUBLISHING DATE Sat Sep  7 17:40:14 2013
-CLIENT (client2): RECEIVED Sat Sep  7 17:40:14 2013
-CLIENT (client1): RECEIVED Sat Sep  7 17:40:14 2013
-CLIENT (client0): RECEIVED Sat Sep  7 17:40:14 2013
-SERVER: PUBLISHING DATE Sat Sep  7 17:40:15 2013
-CLIENT (client1): RECEIVED Sat Sep  7 17:40:15 2013
-CLIENT (client2): RECEIVED Sat Sep  7 17:40:15 2013
-CLIENT (client0): RECEIVED Sat Sep  7 17:40:15 2013
-SERVER: PUBLISHING DATE Sat Sep  7 17:40:16 2013
-CLIENT (client1): RECEIVED Sat Sep  7 17:40:16 2013
-CLIENT (client2): RECEIVED Sat Sep  7 17:40:16 2013
-CLIENT (client0): RECEIVED Sat Sep  7 17:40:16 2013</pre>
-</div>
-</div>
-</div>
-</div>
-<div class="sect1">
-<h2 id="_survey_everybody_votes">Survey (Everybody Votes)</h2>
-<div class="sectionbody">
-<div class="imageblock">
-<div class="content">
-<img src="survey.png" alt="Everybody Votes">
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;assert.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;libc.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/survey.h&gt;</span>
-
-<span class="preprocessor">#define</span> SERVER <span class="string"><span class="delimiter">&quot;</span><span class="content">server</span><span class="delimiter">&quot;</span></span>
-<span class="preprocessor">#define</span> CLIENT <span class="string"><span class="delimiter">&quot;</span><span class="content">client</span><span class="delimiter">&quot;</span></span>
-<span class="preprocessor">#define</span> DATE   <span class="string"><span class="delimiter">&quot;</span><span class="content">DATE</span><span class="delimiter">&quot;</span></span>
-
-<span class="predefined-type">char</span> *date ()
-{
-  time_t raw = time (&amp;raw);
-  <span class="keyword">struct</span> tm *info = localtime (&amp;raw);
-  <span class="predefined-type">char</span> *text = asctime (info);
-  text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span>
-  <span class="keyword">return</span> text;
-}
-
-<span class="predefined-type">int</span> server (<span class="directive">const</span> <span class="predefined-type">char</span> *url)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_SURVEYOR);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_bind (sock, url) &gt;= <span class="integer">0</span>);
-  sleep(<span class="integer">1</span>); <span class="comment">// wait for connections</span>
-  <span class="predefined-type">int</span> sz_d = strlen(DATE) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
-  printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">SERVER: SENDING DATE SURVEY REQUEST</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>);
-  <span class="predefined-type">int</span> bytes = nn_send (sock, DATE, sz_d, <span class="integer">0</span>);
-  assert (bytes == sz_d);
-  <span class="keyword">while</span> (<span class="integer">1</span>)
-    {
-      <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
-      <span class="predefined-type">int</span> bytes = nn_recv (sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
-      <span class="keyword">if</span> (bytes == ETIMEDOUT) <span class="keyword">break</span>;
-      <span class="keyword">if</span> (bytes &gt;= <span class="integer">0</span>)
-      {
-        printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">SERVER: RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="content"> SURVEY RESPONSE</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, buf);
-        nn_freemsg (buf);
-      }
-    }
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> client (<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_RESPONDENT);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_connect (sock, url) &gt;= <span class="integer">0</span>);
-  <span class="keyword">while</span> (<span class="integer">1</span>)
-    {
-      <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
-      <span class="predefined-type">int</span> bytes = nn_recv (sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
-      <span class="keyword">if</span> (bytes &gt;= <span class="integer">0</span>)
-        {
-          printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">CLIENT (%s): RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="content"> SURVEY REQUEST</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name, buf);
-          nn_freemsg (buf);
-          <span class="predefined-type">char</span> *d = date();
-          <span class="predefined-type">int</span> sz_d = strlen(d) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
-          printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">CLIENT (%s): SENDING DATE SURVEY RESPONSE</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name);
-          <span class="predefined-type">int</span> bytes = nn_send (sock, d, sz_d, <span class="integer">0</span>);
-          assert (bytes == sz_d);
-        }
-    }
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> main (<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
-{
-  <span class="keyword">if</span> (strncmp (SERVER, argv[<span class="integer">1</span>], strlen (SERVER)) == <span class="integer">0</span> &amp;&amp; argc &gt;= <span class="integer">2</span>)
-    <span class="keyword">return</span> server (argv[<span class="integer">2</span>]);
-  <span class="keyword">else</span> <span class="keyword">if</span> (strncmp (CLIENT, argv[<span class="integer">1</span>], strlen (CLIENT)) == <span class="integer">0</span> &amp;&amp; argc &gt;= <span class="integer">3</span>)
-    <span class="keyword">return</span> client (argv[<span class="integer">2</span>], argv[<span class="integer">3</span>]);
-  <span class="keyword">else</span>
-    {
-      fprintf (stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: survey %s|%s &lt;URL&gt; &lt;ARG&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
-               SERVER, CLIENT);
-      <span class="keyword">return</span> <span class="integer">1</span>;
-    }
-}</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="bash">gcc survey.c /usr/local/lib/libnanomsg.a -o survey
-./survey server ipc:///tmp/survey.ipc &amp; server=$!
-./survey client ipc:///tmp/survey.ipc client0 &amp; client0=$!
-./survey client ipc:///tmp/survey.ipc client1 &amp; client1=$!
-./survey client ipc:///tmp/survey.ipc client2 &amp; client2=$!
-sleep 3
-kill $server $client0 $client1 $client2</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre>SERVER: SENDING DATE SURVEY REQUEST
-CLIENT (client1): RECEIVED "DATE" SURVEY REQUEST
-CLIENT (client2): RECEIVED "DATE" SURVEY REQUEST
-CLIENT (client0): RECEIVED "DATE" SURVEY REQUEST
-CLIENT (client0): SENDING DATE SURVEY RESPONSE
-CLIENT (client1): SENDING DATE SURVEY RESPONSE
-CLIENT (client2): SENDING DATE SURVEY RESPONSE
-SERVER: RECEIVED "Sun Sep 15 13:39:46 2013" SURVEY RESPONSE
-SERVER: RECEIVED "Sun Sep 15 13:39:46 2013" SURVEY RESPONSE
-SERVER: RECEIVED "Sun Sep 15 13:39:46 2013" SURVEY RESPONSE</pre>
-</div>
-</div>
-</div>
-</div>
-<div class="sect1">
-<h2 id="_bus_routing">Bus (Routing)</h2>
-<div class="sectionbody">
-<div class="imageblock">
-<div class="content">
-<img src="bus.png" alt="A Simple Bus">
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;assert.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;libc.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
-<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/bus.h&gt;</span>
-
-<span class="predefined-type">int</span> node (<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
-{
-  <span class="predefined-type">int</span> sock = nn_socket (AF_SP, NN_BUS);
-  assert (sock &gt;= <span class="integer">0</span>);
-  assert (nn_bind (sock, argv[<span class="integer">2</span>]) &gt;= <span class="integer">0</span>);
-  sleep (<span class="integer">1</span>); <span class="comment">// wait for connections</span>
-  <span class="keyword">if</span> (argc &gt;= <span class="integer">3</span>)
-    {
-      <span class="predefined-type">int</span> x=<span class="integer">3</span>;
-      <span class="keyword">for</span>(x; x&lt;argc; x++)
-        assert (nn_connect (sock, argv[x]) &gt;= <span class="integer">0</span>);
-    }
-  sleep (<span class="integer">1</span>); <span class="comment">// wait for connections</span>
-  <span class="predefined-type">int</span> to = <span class="integer">100</span>;
-  assert (nn_setsockopt (sock, NN_SOL_SOCKET, NN_RCVTIMEO, &amp;to, <span class="keyword">sizeof</span> (to)) &gt;= <span class="integer">0</span>);
-  <span class="comment">// SEND</span>
-  <span class="predefined-type">int</span> sz_n = strlen(argv[<span class="integer">1</span>]) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
-  printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: SENDING '%s' ONTO BUS</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, argv[<span class="integer">1</span>], argv[<span class="integer">1</span>]);
-  <span class="predefined-type">int</span> send = nn_send (sock, argv[<span class="integer">1</span>], sz_n, <span class="integer">0</span>);
-  assert (send == sz_n);
-  <span class="keyword">while</span> (<span class="integer">1</span>)
-    {
-      <span class="comment">// RECV</span>
-      <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
-      <span class="predefined-type">int</span> recv = nn_recv (sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
-      <span class="keyword">if</span> (recv &gt;= <span class="integer">0</span>)
-        {
-          printf (<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: RECEIVED '%s' FROM BUS</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, argv[<span class="integer">1</span>], buf);
-          nn_freemsg (buf);
-        }
-    }
-  <span class="keyword">return</span> nn_shutdown (sock, <span class="integer">0</span>);
-}
-
-<span class="predefined-type">int</span> main (<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
-{
-  <span class="keyword">if</span> (argc &gt;= <span class="integer">3</span>) node (argc, argv);
-  <span class="keyword">else</span>
-    {
-      fprintf (stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: bus &lt;NODE_NAME&gt; &lt;URL&gt; &lt;URL&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>);
-      <span class="keyword">return</span> <span class="integer">1</span>;
-    }
-}</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre class="CodeRay highlight"><code data-lang="bash">gcc bus.c /usr/local/lib/libnanomsg.a -o bus
-./bus node0 ipc:///tmp/node0.ipc ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc &amp; node0=$!
-./bus node1 ipc:///tmp/node1.ipc ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc &amp; node1=$!
-./bus node2 ipc:///tmp/node2.ipc ipc:///tmp/node3.ipc &amp; node2=$!
-./bus node3 ipc:///tmp/node3.ipc ipc:///tmp/node0.ipc &amp; node3=$!
-sleep 5
-kill $node0 $node1 $node2 $node3</code></pre>
-</div>
-</div>
-<div class="listingblock">
-<div class="content">
-<pre>node0: SENDING 'node0' ONTO BUS
-node1: SENDING 'node1' ONTO BUS
-node2: SENDING 'node2' ONTO BUS
-node3: SENDING 'node3' ONTO BUS
-node0: RECEIVED 'node1' FROM BUS
-node0: RECEIVED 'node2' FROM BUS
-node0: RECEIVED 'node3' FROM BUS
-node1: RECEIVED 'node0' FROM BUS
-node1: RECEIVED 'node2' FROM BUS
-node1: RECEIVED 'node3' FROM BUS
-node2: RECEIVED 'node0' FROM BUS
-node2: RECEIVED 'node1' FROM BUS
-node2: RECEIVED 'node3' FROM BUS
-node3: RECEIVED 'node0' FROM BUS
-node3: RECEIVED 'node1' FROM BUS
-node3: RECEIVED 'node2' FROM BUS</pre>
-</div>
+<div class="ulist">
+<ul>
+<li>
+<p><a href="pipeline.html">Pipeline (A One-Way Pipe)</a></p>
+</li>
+<li>
+<p><a href="reqrep.html">Request/Reply (I ask, you answer)</a></p>
+</li>
+<li>
+<p><a href="pair.html">Pair (Two Way Radio)</a></p>
+</li>
+<li>
+<p><a href="pubsub.html">Pub/Sub (Topics &amp; Broadcast)</a></p>
+</li>
+<li>
+<p><a href="survey.html">Survey (Everybody Votes)</a></p>
+</li>
+<li>
+<p><a href="bus.html">Bus (Routing)</a></p>
+</li>
+</ul>
 </div>
 </div>
 </div>
 </div>
 <div id="footer">
 <div id="footer-text">
-Last updated 2017-10-31 04:59:35 UTC
+Last updated 2018-01-09 01:08:26 UTC
 </div>
 </div>
 </body>
diff --git a/gettingstarted/pair.html b/gettingstarted/pair.html
new file mode 100644
index 0000000..ef1809b
--- /dev/null
+++ b/gettingstarted/pair.html
@@ -0,0 +1,698 @@
+---
+layout: default
+---
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge"><![endif]-->
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta name="generator" content="Asciidoctor 1.5.6.1">
+<title>Getting Started with 'nanomsg'</title>
+<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700">
+<style>
+/* Asciidoctor default stylesheet | MIT License | http://asciidoctor.org */
+/* Remove comment around @import statement below when using as a custom stylesheet */
+/*@import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700";*/
+article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block}
+audio,canvas,video{display:inline-block}
+audio:not([controls]){display:none;height:0}
+[hidden],template{display:none}
+script{display:none!important}
+html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}
+a{background:transparent}
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+</head>
+<body class="article">
+<div id="header">
+<h1><a href="index.html">Getting Started with 'nanomsg'</a></h1>
+</div>
+<div id="content">
+<div id="preamble">
+<div class="sectionbody">
+<div class="admonitionblock note">
+<table>
+<tr>
+<td class="icon">
+<i class="fa icon-note" title="Note"></i>
+</td>
+<td class="content">
+This document is derived from an original post by Tim Dysinger.
+That post is no longer available, but we have modified and restructured it,
+as well as making enhancments and corrections.
+Tim&#8217;s original code is on <a href="https://github.com/dysinger/nanomsg-examples">github</a>, but we recommend using the examples here as they have a number of corrections.
+</td>
+</tr>
+</table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_pair_two_way_radio">Pair (Two Way Radio)</h2>
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="pair.png" alt="Two Way Radio">
+</div>
+</div>
+<div class="paragraph">
+<p>The pair pattern is used when there a one-to-one peer relationship.
+Only one peer may be connected to another peer at a time, but both
+may speak freely.</p>
+</div>
+<div class="listingblock">
+<div class="title">pair.c</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;stdlib.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;string.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;unistd.h&gt;</span>
+
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/pair.h&gt;</span>
+
+<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">&quot;</span><span class="content">node0</span><span class="delimiter">&quot;</span></span>
+<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">&quot;</span><span class="content">node1</span><span class="delimiter">&quot;</span></span>
+
+<span class="directive">void</span>
+fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func)
+{
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, func, nn_strerror(nn_errno()));
+        exit(<span class="integer">1</span>);
+}
+
+<span class="predefined-type">int</span>
+send_name(<span class="predefined-type">int</span> sock, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
+{
+        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: SENDING </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name, name);
+        <span class="predefined-type">int</span> sz_n = strlen(name) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+        <span class="keyword">return</span> (nn_send(sock, name, sz_n, <span class="integer">0</span>));
+}
+
+<span class="predefined-type">int</span>
+recv_name(<span class="predefined-type">int</span> sock, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
+{
+        <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+        <span class="predefined-type">int</span> result = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
+        <span class="keyword">if</span> (result &gt; <span class="integer">0</span>) {
+                printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">%s: RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name, buf); <i class="conum" data-value="1"></i><b>(1)</b>
+                nn_freemsg(buf);
+        }
+        <span class="keyword">return</span> (result);
+}
+
+<span class="predefined-type">int</span>
+send_recv(<span class="predefined-type">int</span> sock, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
+{
+        <span class="predefined-type">int</span> to = <span class="integer">100</span>;
+        <span class="keyword">if</span> (nn_setsockopt(sock, NN_SOL_SOCKET, NN_RCVTIMEO, &amp;to,
+            <span class="keyword">sizeof</span> (to)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_setsockopt</span><span class="delimiter">&quot;</span></span>);
+        }
+
+        <span class="keyword">for</span> (;;) {
+                recv_name(sock, name);
+                sleep(<span class="integer">1</span>);
+                send_name(sock, name);
+        }
+}
+
+<span class="predefined-type">int</span>
+node0(<span class="directive">const</span> <span class="predefined-type">char</span> *url)
+{
+        <span class="predefined-type">int</span> sock;
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_PAIR)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+         <span class="keyword">if</span> (nn_bind(sock, url) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_bind</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">return</span> (send_recv(sock, NODE0));
+}
+
+<span class="predefined-type">int</span>
+node1(<span class="directive">const</span> <span class="predefined-type">char</span> *url)
+{
+        <span class="predefined-type">int</span> sock;
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_PAIR)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> (nn_connect(sock, url) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_connect</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">return</span> (send_recv(sock, NODE1));
+}
+
+<span class="predefined-type">int</span>
+main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
+{
+        <span class="keyword">if</span> ((argc &gt; <span class="integer">1</span>) &amp;&amp; (strcmp(NODE0, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (node0(argv[<span class="integer">2</span>]));
+
+        <span class="keyword">if</span> ((argc &gt; <span class="integer">1</span>) &amp;&amp; (strcmp(NODE1, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (node1(argv[<span class="integer">2</span>]));
+
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: pair %s|%s &lt;URL&gt; &lt;ARG&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, NODE0, NODE1);
+        <span class="keyword">return</span> <span class="integer">1</span>;
+}</code></pre>
+</div>
+</div>
+<div class="colist arabic">
+<table>
+<tr>
+<td><i class="conum" data-value="1"></i><b>1</b></td>
+<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td>
+</tr>
+</table>
+</div>
+<div class="listingblock">
+<div class="title">Compilation</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">gcc pair.c -lnanomsg -o pair</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Execution</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">./pair node0 ipc:///tmp/pair.ipc &amp; node0=$!
+./pair node1 ipc:///tmp/pair.ipc &amp; node1=$!
+sleep 3
+kill $node0 $node1</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Output</div>
+<div class="content">
+<pre>NODE1: SENDING DATE REQUEST DATE
+NODE0: RECEIVED DATE REQUEST
+NODE0: SENDING DATE Sat Sep  7 17:39:01 2013
+NODE1: RECEIVED DATE Sat Sep  7 17:39:01 2013</pre>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2018-01-09 01:08:26 UTC
+</div>
+</div>
+</body>
+</html>
diff --git a/gettingstarted/pipeline.html b/gettingstarted/pipeline.html
new file mode 100644
index 0000000..22133a8
--- /dev/null
+++ b/gettingstarted/pipeline.html
@@ -0,0 +1,681 @@
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+</head>
+<body class="article">
+<div id="header">
+<h1><a href="index.html">Getting Started with 'nanomsg'</a></h1>
+</div>
+<div id="content">
+<div id="preamble">
+<div class="sectionbody">
+<div class="admonitionblock note">
+<table>
+<tr>
+<td class="icon">
+<i class="fa icon-note" title="Note"></i>
+</td>
+<td class="content">
+This document is derived from an original post by Tim Dysinger.
+That post is no longer available, but we have modified and restructured it,
+as well as making enhancments and corrections.
+Tim&#8217;s original code is on <a href="https://github.com/dysinger/nanomsg-examples">github</a>, but we recommend using the examples here as they have a number of corrections.
+</td>
+</tr>
+</table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_pipeline_a_one_way_pipe">Pipeline (A One-Way Pipe)</h2>
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="pipeline.png" alt="A One-Way Pipe">
+</div>
+</div>
+<div class="paragraph">
+<p>This pattern is useful for solving producer/consumer problems, including
+load-balancing.  Messages flow from the push side to the pull side.  If
+multiple peers are connected, the pattern attempts to distribute fairly.</p>
+</div>
+<div class="listingblock">
+<div class="title">pipeline.c</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="C"><span class="preprocessor">#include</span> <span class="include">&lt;stdlib.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;string.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;unistd.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/pipeline.h&gt;</span>
+
+<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">&quot;</span><span class="content">node0</span><span class="delimiter">&quot;</span></span>
+<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">&quot;</span><span class="content">node1</span><span class="delimiter">&quot;</span></span>
+
+<span class="directive">void</span>
+fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func)
+{
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, func, nn_strerror(nn_errno()));
+        exit(<span class="integer">1</span>);
+}
+
+<span class="predefined-type">int</span>
+node0(<span class="directive">const</span> <span class="predefined-type">char</span> *url)
+{
+        <span class="predefined-type">int</span> sock;
+        <span class="predefined-type">int</span> rv;
+
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_PULL)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> ((rv = nn_bind(sock, url)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_bind</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">for</span> (;;) {
+                <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+                <span class="predefined-type">int</span> bytes;
+                <span class="keyword">if</span> ((bytes = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>)) &lt; <span class="integer">0</span>) {
+                        fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_recv</span><span class="delimiter">&quot;</span></span>);
+                }
+                printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE0: RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, buf); <i class="conum" data-value="1"></i><b>(1)</b>
+                nn_freemsg(buf);
+        }
+}
+
+<span class="predefined-type">int</span>
+node1(<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *msg)
+{
+        <span class="predefined-type">int</span> sz_msg = strlen(msg) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+        <span class="predefined-type">int</span> sock;
+        <span class="predefined-type">int</span> rv;
+        <span class="predefined-type">int</span> bytes;
+
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_PUSH)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> ((rv = nn_connect(sock, url)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_connect</span><span class="delimiter">&quot;</span></span>);
+        }
+        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE1: SENDING </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, msg);
+        <span class="keyword">if</span> ((bytes = nn_send(sock, msg, sz_msg, <span class="integer">0</span>)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_send</span><span class="delimiter">&quot;</span></span>);
+        }
+        sleep(<span class="integer">1</span>); <span class="comment">// wait for messages to flush before shutting down</span>
+        <span class="keyword">return</span> (nn_shutdown(sock, <span class="integer">0</span>));
+}
+
+<span class="predefined-type">int</span>
+main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
+{
+        <span class="keyword">if</span> ((argc &gt; <span class="integer">1</span>) &amp;&amp; (strcmp(NODE0, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (node0(argv[<span class="integer">2</span>]));
+
+        <span class="keyword">if</span> ((argc &gt; <span class="integer">2</span>) &amp;&amp; (strcmp(NODE1, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (node1(argv[<span class="integer">2</span>], argv[<span class="integer">3</span>]));
+
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: pipeline %s|%s &lt;URL&gt; &lt;ARG&gt; ...'</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
+                NODE0, NODE1);
+        <span class="keyword">return</span> (<span class="integer">1</span>);
+}</code></pre>
+</div>
+</div>
+<div class="colist arabic">
+<table>
+<tr>
+<td><i class="conum" data-value="1"></i><b>1</b></td>
+<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td>
+</tr>
+</table>
+</div>
+<div class="listingblock">
+<div class="title">Compilation</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">gcc pipeline.c -lnanomsg -o pipeline</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Execution</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">./pipeline node0 ipc:///tmp/pipeline.ipc &amp; node0=$! &amp;&amp; sleep 1
+./pipeline node1 ipc:///tmp/pipeline.ipc &quot;Hello, World!&quot;
+./pipeline node1 ipc:///tmp/pipeline.ipc &quot;Goodbye.&quot;
+kill $node0</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Output</div>
+<div class="content">
+<pre>NODE1: SENDING "Hello, World!"
+NODE0: RECEIVED "Hello, World!"
+NODE1: SENDING "Goodbye."
+NODE0: RECEIVED "Goodbye."</pre>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2018-01-09 01:08:26 UTC
+</div>
+</div>
+</body>
+</html>
diff --git a/gettingstarted/pubsub.html b/gettingstarted/pubsub.html
new file mode 100644
index 0000000..365c76a
--- /dev/null
+++ b/gettingstarted/pubsub.html
@@ -0,0 +1,712 @@
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+</head>
+<body class="article">
+<div id="header">
+<h1><a href="index.html">Getting Started with 'nanomsg'</a></h1>
+</div>
+<div id="content">
+<div id="preamble">
+<div class="sectionbody">
+<div class="admonitionblock note">
+<table>
+<tr>
+<td class="icon">
+<i class="fa icon-note" title="Note"></i>
+</td>
+<td class="content">
+This document is derived from an original post by Tim Dysinger.
+That post is no longer available, but we have modified and restructured it,
+as well as making enhancments and corrections.
+Tim&#8217;s original code is on <a href="https://github.com/dysinger/nanomsg-examples">github</a>, but we recommend using the examples here as they have a number of corrections.
+</td>
+</tr>
+</table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_pub_sub_topics_broadcast">Pub/Sub (Topics &amp; Broadcast)</h2>
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="pubsub.png" alt="Topics &amp; Broadcast">
+</div>
+</div>
+<div class="paragraph">
+<p>This pattern is used to allow a single broadcaster to publish messages
+to many subscribers, which may choose to limit which messages they receive.</p>
+</div>
+<div class="listingblock">
+<div class="title">pubsub.c</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;stdlib.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;string.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;time.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;unistd.h&gt;</span>
+
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/pubsub.h&gt;</span>
+
+<span class="preprocessor">#define</span> SERVER <span class="string"><span class="delimiter">&quot;</span><span class="content">server</span><span class="delimiter">&quot;</span></span>
+<span class="preprocessor">#define</span> CLIENT <span class="string"><span class="delimiter">&quot;</span><span class="content">client</span><span class="delimiter">&quot;</span></span>
+
+<span class="directive">void</span>
+fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func)
+{
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, func, nn_strerror(nn_errno()));
+}
+
+<span class="predefined-type">char</span> *
+date(<span class="directive">void</span>)
+{
+        time_t now = time(&amp;now);
+        <span class="keyword">struct</span> tm *info = localtime(&amp;now);
+        <span class="predefined-type">char</span> *text = asctime(info);
+        text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span>
+        <span class="keyword">return</span> (text);
+}
+
+<span class="predefined-type">int</span>
+server(<span class="directive">const</span> <span class="predefined-type">char</span> *url)
+{
+        <span class="predefined-type">int</span> sock;
+
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_PUB)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+          <span class="keyword">if</span> (nn_bind(sock, url) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_bind</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">for</span> (;;) {
+                <span class="predefined-type">char</span> *d = date();
+                <span class="predefined-type">int</span> sz_d = strlen(d) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+                printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">SERVER: PUBLISHING DATE %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, d);
+                <span class="predefined-type">int</span> bytes = nn_send(sock, d, sz_d, <span class="integer">0</span>);
+                <span class="keyword">if</span> (bytes &lt; <span class="integer">0</span>) {
+                        fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_send</span><span class="delimiter">&quot;</span></span>);
+                }
+                sleep(<span class="integer">1</span>);
+        }
+}
+
+<span class="predefined-type">int</span>
+client(<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
+{
+        <span class="predefined-type">int</span> sock;
+
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_SUB)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+
+        <span class="comment">// subscribe to everything (&quot;&quot; means all topics)</span>
+        <span class="keyword">if</span> (nn_setsockopt(sock, NN_SUB, NN_SUB_SUBSCRIBE, <span class="string"><span class="delimiter">&quot;</span><span class="delimiter">&quot;</span></span>, <span class="integer">0</span>) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_setsockopt</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> (nn_connect(sock, url) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_connet</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">for</span> (;;) {
+                <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+                <span class="predefined-type">int</span> bytes = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
+                <span class="keyword">if</span> (bytes &lt; <span class="integer">0</span>) {
+                        fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_recv</span><span class="delimiter">&quot;</span></span>);
+                }
+                printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">CLIENT (%s): RECEIVED %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, name, buf); <i class="conum" data-value="1"></i><b>(1)</b>
+                nn_freemsg(buf);
+        }
+}
+
+<span class="predefined-type">int</span>
+main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
+{
+        <span class="keyword">if</span> ((argc &gt;= <span class="integer">2</span>) &amp;&amp; (strcmp(SERVER, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (server(argv[<span class="integer">2</span>]));
+
+          <span class="keyword">if</span> ((argc &gt;= <span class="integer">3</span>) &amp;&amp; (strcmp(CLIENT, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (client (argv[<span class="integer">2</span>], argv[<span class="integer">3</span>]));
+
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: pubsub %s|%s &lt;URL&gt; &lt;ARG&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
+            SERVER, CLIENT);
+        <span class="keyword">return</span> <span class="integer">1</span>;
+}</code></pre>
+</div>
+</div>
+<div class="colist arabic">
+<table>
+<tr>
+<td><i class="conum" data-value="1"></i><b>1</b></td>
+<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td>
+</tr>
+</table>
+</div>
+<div class="listingblock">
+<div class="title">Compilation</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">gcc pubsub.c /usr/local/lib/libnanomsg.a -o pubsub</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Execution</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">./pubsub server ipc:///tmp/pubsub.ipc &amp; server=$! &amp;&amp; sleep 1
+./pubsub client ipc:///tmp/pubsub.ipc client0 &amp; client0=$!
+./pubsub client ipc:///tmp/pubsub.ipc client1 &amp; client1=$!
+./pubsub client ipc:///tmp/pubsub.ipc client2 &amp; client2=$!
+sleep 5
+kill $server $client0 $client1 $client2</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Output</div>
+<div class="content">
+<pre>SERVER: PUBLISHING DATE Sat Sep  7 17:40:11 2013
+SERVER: PUBLISHING DATE Sat Sep  7 17:40:12 2013
+SERVER: PUBLISHING DATE Sat Sep  7 17:40:13 2013
+CLIENT (client2): RECEIVED Sat Sep  7 17:40:13 2013
+CLIENT (client0): RECEIVED Sat Sep  7 17:40:13 2013
+CLIENT (client1): RECEIVED Sat Sep  7 17:40:13 2013
+SERVER: PUBLISHING DATE Sat Sep  7 17:40:14 2013
+CLIENT (client2): RECEIVED Sat Sep  7 17:40:14 2013
+CLIENT (client1): RECEIVED Sat Sep  7 17:40:14 2013
+CLIENT (client0): RECEIVED Sat Sep  7 17:40:14 2013
+SERVER: PUBLISHING DATE Sat Sep  7 17:40:15 2013
+CLIENT (client1): RECEIVED Sat Sep  7 17:40:15 2013
+CLIENT (client2): RECEIVED Sat Sep  7 17:40:15 2013
+CLIENT (client0): RECEIVED Sat Sep  7 17:40:15 2013
+SERVER: PUBLISHING DATE Sat Sep  7 17:40:16 2013
+CLIENT (client1): RECEIVED Sat Sep  7 17:40:16 2013
+CLIENT (client2): RECEIVED Sat Sep  7 17:40:16 2013
+CLIENT (client0): RECEIVED Sat Sep  7 17:40:16 2013</pre>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2018-01-09 01:08:26 UTC
+</div>
+</div>
+</body>
+</html>
diff --git a/gettingstarted/reqrep.html b/gettingstarted/reqrep.html
new file mode 100644
index 0000000..0d4d489
--- /dev/null
+++ b/gettingstarted/reqrep.html
@@ -0,0 +1,706 @@
+---
+layout: default
+---
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+<head>
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+</head>
+<body class="article">
+<div id="header">
+<h1><a href="index.html">Getting Started with 'nanomsg'</a></h1>
+</div>
+<div id="content">
+<div id="preamble">
+<div class="sectionbody">
+<div class="admonitionblock note">
+<table>
+<tr>
+<td class="icon">
+<i class="fa icon-note" title="Note"></i>
+</td>
+<td class="content">
+This document is derived from an original post by Tim Dysinger.
+That post is no longer available, but we have modified and restructured it,
+as well as making enhancments and corrections.
+Tim&#8217;s original code is on <a href="https://github.com/dysinger/nanomsg-examples">github</a>, but we recommend using the examples here as they have a number of corrections.
+</td>
+</tr>
+</table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_request_reply_i_ask_you_answer">Request/Reply (I ask, you answer)</h2>
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="reqrep.png" alt="I ask" width="you answer">
+</div>
+</div>
+<div class="paragraph">
+<p>Request/Reply is used for synchronous communications where each question
+is responded with a single answer, for example remote procedure calls (RPCs).
+Like <a href="pipeline.html">Pipeline</a>, it also can perform load-balancing.  This
+is the only reliaable messaging pattern in the suite, as it automatically
+will retry if a request is not matched with a response.</p>
+</div>
+<div class="listingblock">
+<div class="title">reqprep.c</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;stdlib.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;string.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;time.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/reqrep.h&gt;</span>
+
+<span class="preprocessor">#define</span> NODE0 <span class="string"><span class="delimiter">&quot;</span><span class="content">node0</span><span class="delimiter">&quot;</span></span>
+<span class="preprocessor">#define</span> NODE1 <span class="string"><span class="delimiter">&quot;</span><span class="content">node1</span><span class="delimiter">&quot;</span></span>
+<span class="preprocessor">#define</span> DATE <span class="string"><span class="delimiter">&quot;</span><span class="content">DATE</span><span class="delimiter">&quot;</span></span>
+
+<span class="directive">void</span>
+fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func)
+{
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, func, nn_strerror(nn_errno()));
+        exit(<span class="integer">1</span>);
+}
+
+<span class="predefined-type">char</span> *
+date(<span class="directive">void</span>)
+{
+        time_t now = time(&amp;now);
+        <span class="keyword">struct</span> tm *info = localtime(&amp;now);
+        <span class="predefined-type">char</span> *text = asctime(info);
+        text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span>
+        <span class="keyword">return</span> (text);
+}
+
+<span class="predefined-type">int</span>
+node0(<span class="directive">const</span> <span class="predefined-type">char</span> *url)
+{
+        <span class="predefined-type">int</span> sz_date = strlen(DATE) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+        <span class="predefined-type">int</span> sock;
+        <span class="predefined-type">int</span> rv;
+
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_REP)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+          <span class="keyword">if</span> ((rv = nn_bind(sock, url)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_bind</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">for</span> (;;) {
+                <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+                <span class="predefined-type">int</span> bytes;
+                <span class="keyword">if</span> ((bytes = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>)) &lt; <span class="integer">0</span>) {
+                        fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_recv</span><span class="delimiter">&quot;</span></span>);
+                }
+                <span class="keyword">if</span> ((bytes == (strlen(DATE) + <span class="integer">1</span>)) &amp;&amp; (strcmp(DATE, buf) == <span class="integer">0</span>)) {
+                        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE0: RECEIVED DATE REQUEST</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>);
+                        <span class="predefined-type">char</span> *d = date();
+                        <span class="predefined-type">int</span> sz_d = strlen(d) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+                        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE0: SENDING DATE %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, d);
+                        <span class="keyword">if</span> ((bytes = nn_send(sock, d, sz_d, <span class="integer">0</span>)) &lt; <span class="integer">0</span>) {
+                                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_send</span><span class="delimiter">&quot;</span></span>);
+                        }
+                }
+                nn_freemsg(buf);
+        }
+}
+
+<span class="predefined-type">int</span>
+node1(<span class="directive">const</span> <span class="predefined-type">char</span> *url)
+{
+        <span class="predefined-type">int</span> sz_date = strlen(DATE) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+        <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+        <span class="predefined-type">int</span> bytes = -<span class="integer">1</span>;
+        <span class="predefined-type">int</span> sock;
+        <span class="predefined-type">int</span> rv;
+
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_REQ)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> ((rv = nn_connect (sock, url)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_connect</span><span class="delimiter">&quot;</span></span>);
+        }
+        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE1: SENDING DATE REQUEST %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, DATE);
+        <span class="keyword">if</span> ((bytes = nn_send(sock, DATE, sz_date, <span class="integer">0</span>)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_send</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> ((bytes = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_recv</span><span class="delimiter">&quot;</span></span>);
+        }
+        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">NODE1: RECEIVED DATE %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, buf);  <i class="conum" data-value="1"></i><b>(1)</b>
+        nn_freemsg(buf);
+        <span class="keyword">return</span> (nn_shutdown(sock, <span class="integer">0</span>));
+}
+
+<span class="predefined-type">int</span>
+main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
+{
+        <span class="keyword">if</span> ((argc &gt; <span class="integer">1</span>) &amp;&amp; (strcmp(NODE0, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (node0(argv[<span class="integer">2</span>]));
+
+        <span class="keyword">if</span> ((argc &gt; <span class="integer">1</span>) &amp;&amp; (strcmp(NODE1, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (node1(argv[<span class="integer">2</span>]));
+
+      fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: reqrep %s|%s &lt;URL&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, NODE0, NODE1);
+      <span class="keyword">return</span> (<span class="integer">1</span>);
+}</code></pre>
+</div>
+</div>
+<div class="colist arabic">
+<table>
+<tr>
+<td><i class="conum" data-value="1"></i><b>1</b></td>
+<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td>
+</tr>
+</table>
+</div>
+<div class="listingblock">
+<div class="title">Compilation</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">gcc reqrep.c -lnanomsg -o reqrep</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Execution</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">./reqrep node0 ipc:///tmp/reqrep.ipc &amp; node0=$! &amp;&amp; sleep 1
+./reqrep node1 ipc:///tmp/reqrep.ipc
+kill $node0</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Output</div>
+<div class="content">
+<pre>NODE1: SENDING DATE REQUEST DATE
+NODE0: RECEIVED DATE REQUEST
+NODE0: SENDING DATE Sat Sep  7 17:39:01 2013
+NODE1: RECEIVED DATE Sat Sep  7 17:39:01 2013</pre>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2018-01-09 01:08:26 UTC
+</div>
+</div>
+</body>
+</html>
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+</head>
+<body class="article">
+<div id="header">
+<h1><a href="index.html">Getting Started with 'nanomsg'</a></h1>
+</div>
+<div id="content">
+<div id="preamble">
+<div class="sectionbody">
+<div class="admonitionblock note">
+<table>
+<tr>
+<td class="icon">
+<i class="fa icon-note" title="Note"></i>
+</td>
+<td class="content">
+This document is derived from an original post by Tim Dysinger.
+That post is no longer available, but we have modified and restructured it,
+as well as making enhancments and corrections.
+Tim&#8217;s original code is on <a href="https://github.com/dysinger/nanomsg-examples">github</a>, but we recommend using the examples here as they have a number of corrections.
+</td>
+</tr>
+</table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_survey_everybody_votes">Survey (Everybody Votes)</h2>
+<div class="sectionbody">
+<div class="imageblock">
+<div class="content">
+<img src="survey.png" alt="Everybody Votes">
+</div>
+</div>
+<div class="paragraph">
+<p>The surveyor pattern is used to send a timed survey out, responses
+are individually returned until the survey has expired.  This pattern
+is useful for service discovery and voting algorithms.</p>
+</div>
+<div class="listingblock">
+<div class="title">survey.c</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="c"><span class="preprocessor">#include</span> <span class="include">&lt;stdio.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;stdlib.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;string.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;time.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;unistd.h&gt;</span>
+
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/nn.h&gt;</span>
+<span class="preprocessor">#include</span> <span class="include">&lt;nanomsg/survey.h&gt;</span>
+
+<span class="preprocessor">#define</span> SERVER <span class="string"><span class="delimiter">&quot;</span><span class="content">server</span><span class="delimiter">&quot;</span></span>
+<span class="preprocessor">#define</span> CLIENT <span class="string"><span class="delimiter">&quot;</span><span class="content">client</span><span class="delimiter">&quot;</span></span>
+<span class="preprocessor">#define</span> DATE   <span class="string"><span class="delimiter">&quot;</span><span class="content">DATE</span><span class="delimiter">&quot;</span></span>
+
+<span class="directive">void</span>
+fatal(<span class="directive">const</span> <span class="predefined-type">char</span> *func)
+{
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">%s: %s</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>, func, nn_strerror(nn_errno()));
+        exit(<span class="integer">1</span>);
+}
+
+<span class="predefined-type">char</span> *
+date(<span class="directive">void</span>)
+{
+        time_t now = time(&amp;now);
+        <span class="keyword">struct</span> tm *info = localtime(&amp;now);
+        <span class="predefined-type">char</span> *text = asctime(info);
+        text[strlen(text)-<span class="integer">1</span>] = <span class="char">'\0'</span>; <span class="comment">// remove '\n'</span>
+        <span class="keyword">return</span> (text);
+}
+
+<span class="predefined-type">int</span>
+server(<span class="directive">const</span> <span class="predefined-type">char</span> *url)
+{
+        <span class="predefined-type">int</span> sock;
+
+        <span class="keyword">if</span> ((sock = nn_socket (AF_SP, NN_SURVEYOR)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> (nn_bind(sock, url)  &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_bind</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">for</span> (;;) {
+                printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">SERVER: SENDING DATE SURVEY REQUEST</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>);
+                <span class="predefined-type">int</span> bytes = nn_send(sock, DATE, strlen(DATE) + <span class="integer">1</span>, <span class="integer">0</span>);
+                <span class="keyword">if</span> (bytes &lt; <span class="integer">0</span>) {
+                        fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_send</span><span class="delimiter">&quot;</span></span>);
+                }
+
+                <span class="keyword">for</span> (;;) {
+                        <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+                        <span class="predefined-type">int</span> bytes = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
+                        <span class="keyword">if</span> (bytes &lt; <span class="integer">0</span>) {
+                                <span class="keyword">if</span> (nn_errno() == ETIMEDOUT) {
+                                        <span class="keyword">break</span>;
+                                }
+                                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_recv</span><span class="delimiter">&quot;</span></span>);
+                        }
+                        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">SERVER: RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="content"> SURVEY RESPONSE</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
+                            buf); <i class="conum" data-value="1"></i><b>(1)</b>
+                        nn_freemsg(buf);
+                }
+
+                printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">SERVER: SURVEY COMPLETE</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>);
+                sleep(<span class="integer">1</span>); <span class="comment">// Start another survey in a second</span>
+        }
+}
+
+<span class="predefined-type">int</span>
+client(<span class="directive">const</span> <span class="predefined-type">char</span> *url, <span class="directive">const</span> <span class="predefined-type">char</span> *name)
+{
+        <span class="predefined-type">int</span> sock;
+
+        <span class="keyword">if</span> ((sock = nn_socket(AF_SP, NN_RESPONDENT)) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_socket</span><span class="delimiter">&quot;</span></span>);
+        }
+        <span class="keyword">if</span> (nn_connect (sock, url) &lt; <span class="integer">0</span>) {
+                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_connect</span><span class="delimiter">&quot;</span></span>);
+        }
+            <span class="keyword">for</span> (;;) {
+                <span class="predefined-type">char</span> *buf = <span class="predefined-constant">NULL</span>;
+                <span class="predefined-type">int</span> bytes = nn_recv(sock, &amp;buf, NN_MSG, <span class="integer">0</span>);
+                <span class="keyword">if</span> (bytes &gt;= <span class="integer">0</span>) {
+                        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">CLIENT (%s): RECEIVED </span><span class="char">\&quot;</span><span class="content">%s</span><span class="char">\&quot;</span><span class="content"> SURVEY REQUEST</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
+                            name, buf); <i class="conum" data-value="1"></i><b>(1)</b>
+                        nn_freemsg(buf);
+                        <span class="predefined-type">char</span> *d = date();
+                        <span class="predefined-type">int</span> sz_d = strlen(d) + <span class="integer">1</span>; <span class="comment">// '\0' too</span>
+                        printf(<span class="string"><span class="delimiter">&quot;</span><span class="content">CLIENT (%s): SENDING DATE SURVEY RESPONSE</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
+                           name);
+                        <span class="keyword">if</span> (nn_send(sock, d, sz_d, <span class="integer">0</span>) &lt; <span class="integer">0</span>) {
+                                fatal(<span class="string"><span class="delimiter">&quot;</span><span class="content">nn_send</span><span class="delimiter">&quot;</span></span>);
+                        }
+                }
+        }
+}
+
+<span class="predefined-type">int</span>
+main(<span class="directive">const</span> <span class="predefined-type">int</span> argc, <span class="directive">const</span> <span class="predefined-type">char</span> **argv)
+{
+        <span class="keyword">if</span> ((argc &gt;= <span class="integer">2</span>) &amp;&amp; (strcmp(SERVER, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (server(argv[<span class="integer">2</span>]));
+
+        <span class="keyword">if</span> ((argc &gt;= <span class="integer">3</span>) &amp;&amp; (strcmp(CLIENT, argv[<span class="integer">1</span>]) == <span class="integer">0</span>))
+                <span class="keyword">return</span> (client(argv[<span class="integer">2</span>], argv[<span class="integer">3</span>]));
+
+        fprintf(stderr, <span class="string"><span class="delimiter">&quot;</span><span class="content">Usage: survey %s|%s &lt;URL&gt; &lt;ARG&gt; ...</span><span class="char">\n</span><span class="delimiter">&quot;</span></span>,
+            SERVER, CLIENT);
+        <span class="keyword">return</span> <span class="integer">1</span>;
+}</code></pre>
+</div>
+</div>
+<div class="colist arabic">
+<table>
+<tr>
+<td><i class="conum" data-value="1"></i><b>1</b></td>
+<td>Blithely assumes message is ASCIIZ string. Real code should check it.</td>
+</tr>
+</table>
+</div>
+<div class="listingblock">
+<div class="title">Compilation</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">gcc survey.c -lnanmosg -o survey</code></pre>
+</div>
+</div>
+<div class="listingblock">
+<div class="title">Execution</div>
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="bash">./survey server ipc:///tmp/survey.ipc &amp; server=$!
+./survey client ipc:///tmp/survey.ipc client0 &amp; client0=$!
+./survey client ipc:///tmp/survey.ipc client1 &amp; client1=$!
+./survey client ipc:///tmp/survey.ipc client2 &amp; client2=$!
+sleep 4 <i class="conum" data-value="1"></i><b>(1)</b>
+kill $server $client0 $client1 $client2</code></pre>
+</div>
+</div>
+<div class="colist arabic">
+<table>
+<tr>
+<td><i class="conum" data-value="1"></i><b>1</b></td>
+<td>The first survey times out with no responders because the clients aren’t started yet.</td>
+</tr>
+</table>
+</div>
+<div class="listingblock">
+<div class="title">Output</div>
+<div class="content">
+<pre>SERVER: SENDING DATE SURVEY REQUEST
+SERVER: SURVEY COMPLETE
+SERVER: SENDING DATE SURVEY REQUEST
+CLIENT (client2): RECEIVED "DATE" SURVEY REQUEST
+CLIENT (client1): RECEIVED "DATE" SURVEY REQUEST
+CLIENT (client0): RECEIVED "DATE" SURVEY REQUEST
+CLIENT (client1): SENDING DATE SURVEY RESPONSE
+CLIENT (client0): SENDING DATE SURVEY RESPONSE
+CLIENT (client2): SENDING DATE SURVEY RESPONSE
+SERVER: RECEIVED "Mon Jan  8 13:10:43 2018" SURVEY RESPONSE
+SERVER: RECEIVED "Mon Jan  8 13:10:43 2018" SURVEY RESPONSE
+SERVER: RECEIVED "Mon Jan  8 13:10:43 2018" SURVEY RESPONSE
+SERVER: SURVEY COMPLETE</pre>
+</div>
+</div>
+</div>
+</div>
+</div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2018-01-09 01:08:26 UTC
+</div>
+</div>
+</body>
+</html>