doc/html/boost_asio/overview/posix/local.html

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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="boost_asio.overview.posix.local"></a><a class="link" href="local.html" title="UNIX Domain Sockets">UNIX Domain Sockets</a>
  28 </h4></div></div></div>
  29 <p>
  30           Boost.Asio provides basic support for UNIX domain sockets (also known as
  31           local sockets). The simplest use involves creating a pair of connected
  32           sockets. The following code:
  33         </p>
  34 <pre class="programlisting">local::stream_protocol::socket socket1(my_io_context);
  35 local::stream_protocol::socket socket2(my_io_context);
  36 local::connect_pair(socket1, socket2);
  37 </pre>
  38 <p>
  39           will create a pair of stream-oriented sockets. To do the same for datagram-oriented
  40           sockets, use:
  41         </p>
  42 <pre class="programlisting">local::datagram_protocol::socket socket1(my_io_context);
  43 local::datagram_protocol::socket socket2(my_io_context);
  44 local::connect_pair(socket1, socket2);
  45 </pre>
  46 <p>
  47           A UNIX domain socket server may be created by binding an acceptor to an
  48           endpoint, in much the same way as one does for a TCP server:
  49         </p>
  50 <pre class="programlisting">::unlink("/tmp/foobar"); // Remove previous binding.
  51 local::stream_protocol::endpoint ep("/tmp/foobar");
  52 local::stream_protocol::acceptor acceptor(my_io_context, ep);
  53 local::stream_protocol::socket socket(my_io_context);
  54 acceptor.accept(socket);
  55 </pre>
  56 <p>
  57           A client that connects to this server might look like:
  58         </p>
  59 <pre class="programlisting">local::stream_protocol::endpoint ep("/tmp/foobar");
  60 local::stream_protocol::socket socket(my_io_context);
  61 socket.connect(ep);
  62 </pre>
  63 <p>
  64           Transmission of file descriptors or credentials across UNIX domain sockets
  65           is not directly supported within Boost.Asio, but may be achieved by accessing
  66           the socket's underlying descriptor using the <a class="link" href="../../reference/basic_socket/native_handle.html" title="basic_socket::native_handle">native_handle()</a>
  67           member function.
  68         </p>
  69 <h6>
  70 <a name="boost_asio.overview.posix.local.h0"></a>
  71           <span class="phrase"><a name="boost_asio.overview.posix.local.see_also"></a></span><a class="link" href="local.html#boost_asio.overview.posix.local.see_also">See
  72           Also</a>
  73         </h6>
  74 <p>
  75           <a class="link" href="../../reference/local__connect_pair.html" title="local::connect_pair">local::connect_pair</a>,
  76           <a class="link" href="../../reference/local__datagram_protocol.html" title="local::datagram_protocol">local::datagram_protocol</a>,
  77           <a class="link" href="../../reference/local__datagram_protocol/endpoint.html" title="local::datagram_protocol::endpoint">local::datagram_protocol::endpoint</a>,
  78           <a class="link" href="../../reference/local__datagram_protocol/socket.html" title="local::datagram_protocol::socket">local::datagram_protocol::socket</a>,
  79           <a class="link" href="../../reference/local__stream_protocol.html" title="local::stream_protocol">local::stream_protocol</a>,
  80           <a class="link" href="../../reference/local__stream_protocol/acceptor.html" title="local::stream_protocol::acceptor">local::stream_protocol::acceptor</a>,
  81           <a class="link" href="../../reference/local__stream_protocol/endpoint.html" title="local::stream_protocol::endpoint">local::stream_protocol::endpoint</a>,
  82           <a class="link" href="../../reference/local__stream_protocol/iostream.html" title="local::stream_protocol::iostream">local::stream_protocol::iostream</a>,
  83           <a class="link" href="../../reference/local__stream_protocol/socket.html" title="local::stream_protocol::socket">local::stream_protocol::socket</a>,
  84           <a class="link" href="../../examples/cpp03_examples.html#boost_asio.examples.cpp03_examples.unix_domain_sockets">UNIX
  85           domain sockets examples</a>.
  86         </p>
  87 <h6>
  88 <a name="boost_asio.overview.posix.local.h1"></a>
  89           <span class="phrase"><a name="boost_asio.overview.posix.local.notes"></a></span><a class="link" href="local.html#boost_asio.overview.posix.local.notes">Notes</a>
  90         </h6>
  91 <p>
  92           UNIX domain sockets are only available at compile time if supported by
  93           the target operating system. A program may test for the macro <code class="computeroutput">BOOST_ASIO_HAS_LOCAL_SOCKETS</code>
  94           to determine whether they are supported.
  95         </p>
  96 </div>
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  99 <td align="right"><div class="copyright-footer">Copyright &#169; 2003-2019 Christopher M. Kohlhoff<p>
 100         Distributed under the Boost Software License, Version 1.0. (See accompanying
 101         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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