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diff --git a/lib/asio/local/detail/endpoint.hpp b/lib/asio/local/detail/endpoint.hpp
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+//
+// local/detail/endpoint.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+// Derived from a public domain implementation written by Daniel Casimiro.
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASIO_LOCAL_DETAIL_ENDPOINT_HPP
+#define ASIO_LOCAL_DETAIL_ENDPOINT_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#if defined(ASIO_HAS_LOCAL_SOCKETS)
+
+#include <cstddef>
+#include <string>
+#include "asio/detail/socket_types.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace local {
+namespace detail {
+
+// Helper class for implementing a UNIX domain endpoint.
+class endpoint
+{
+public:
+  // Default constructor.
+  ASIO_DECL endpoint();
+
+  // Construct an endpoint using the specified path name.
+  ASIO_DECL endpoint(const char* path_name);
+
+  // Construct an endpoint using the specified path name.
+  ASIO_DECL endpoint(const std::string& path_name);
+
+  // Copy constructor.
+  endpoint(const endpoint& other)
+    : data_(other.data_),
+      path_length_(other.path_length_)
+  {
+  }
+
+  // Assign from another endpoint.
+  endpoint& operator=(const endpoint& other)
+  {
+    data_ = other.data_;
+    path_length_ = other.path_length_;
+    return *this;
+  }
+
+  // Get the underlying endpoint in the native type.
+  asio::detail::socket_addr_type* data()
+  {
+    return &data_.base;
+  }
+
+  // Get the underlying endpoint in the native type.
+  const asio::detail::socket_addr_type* data() const
+  {
+    return &data_.base;
+  }
+
+  // Get the underlying size of the endpoint in the native type.
+  std::size_t size() const
+  {
+    return path_length_
+      + offsetof(asio::detail::sockaddr_un_type, sun_path);
+  }
+
+  // Set the underlying size of the endpoint in the native type.
+  ASIO_DECL void resize(std::size_t size);
+
+  // Get the capacity of the endpoint in the native type.
+  std::size_t capacity() const
+  {
+    return sizeof(asio::detail::sockaddr_un_type);
+  }
+
+  // Get the path associated with the endpoint.
+  ASIO_DECL std::string path() const;
+
+  // Set the path associated with the endpoint.
+  ASIO_DECL void path(const char* p);
+
+  // Set the path associated with the endpoint.
+  ASIO_DECL void path(const std::string& p);
+
+  // Compare two endpoints for equality.
+  ASIO_DECL friend bool operator==(
+      const endpoint& e1, const endpoint& e2);
+
+  // Compare endpoints for ordering.
+  ASIO_DECL friend bool operator<(
+      const endpoint& e1, const endpoint& e2);
+
+private:
+  // The underlying UNIX socket address.
+  union data_union
+  {
+    asio::detail::socket_addr_type base;
+    asio::detail::sockaddr_un_type local;
+  } data_;
+
+  // The length of the path associated with the endpoint.
+  std::size_t path_length_;
+
+  // Initialise with a specified path.
+  ASIO_DECL void init(const char* path, std::size_t path_length);
+};
+
+} // namespace detail
+} // namespace local
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#if defined(ASIO_HEADER_ONLY)
+# include "asio/local/detail/impl/endpoint.ipp"
+#endif // defined(ASIO_HEADER_ONLY)
+
+#endif // defined(ASIO_HAS_LOCAL_SOCKETS)
+
+#endif // ASIO_LOCAL_DETAIL_ENDPOINT_HPP