ceph/src/boost/libs/asio/include/boost/asio/local/detail/impl/endpoint.ipp

   1 //
   2 // local/detail/impl/endpoint.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 // Derived from a public domain implementation written by Daniel Casimiro.
   7 //
   8 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   9 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11
  12 #ifndef BOOST_ASIO_LOCAL_DETAIL_IMPL_ENDPOINT_IPP
  13 #define BOOST_ASIO_LOCAL_DETAIL_IMPL_ENDPOINT_IPP
  14
  15 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  16 # pragma once
  17 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  18
  19 #include <boost/asio/detail/config.hpp>
  20
  21 #if defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
  22
  23 #include <cstring>
  24 #include <boost/asio/detail/socket_ops.hpp>
  25 #include <boost/asio/detail/throw_error.hpp>
  26 #include <boost/asio/error.hpp>
  27 #include <boost/asio/local/detail/endpoint.hpp>
  28
  29 #include <boost/asio/detail/push_options.hpp>
  30
  31 namespace boost {
  32 namespace asio {
  33 namespace local {
  34 namespace detail {
  35
  36 endpoint::endpoint()
  37 {
  38   init("", 0);
  39 }
  40
  41 endpoint::endpoint(const char* path_name)
  42 {
  43   using namespace std; // For strlen.
  44   init(path_name, strlen(path_name));
  45 }
  46
  47 endpoint::endpoint(const std::string& path_name)
  48 {
  49   init(path_name.data(), path_name.length());
  50 }
  51
  52 void endpoint::resize(std::size_t new_size)
  53 {
  54   if (new_size > sizeof(boost::asio::detail::sockaddr_un_type))
  55   {
  56     boost::system::error_code ec(boost::asio::error::invalid_argument);
  57     boost::asio::detail::throw_error(ec);
  58   }
  59   else if (new_size == 0)
  60   {
  61     path_length_ = 0;
  62   }
  63   else
  64   {
  65     path_length_ = new_size
  66       - offsetof(boost::asio::detail::sockaddr_un_type, sun_path);
  67
  68     // The path returned by the operating system may be NUL-terminated.
  69     if (path_length_ > 0 && data_.local.sun_path[path_length_ - 1] == 0)
  70       --path_length_;
  71   }
  72 }
  73
  74 std::string endpoint::path() const
  75 {
  76   return std::string(data_.local.sun_path, path_length_);
  77 }
  78
  79 void endpoint::path(const char* p)
  80 {
  81   using namespace std; // For strlen.
  82   init(p, strlen(p));
  83 }
  84
  85 void endpoint::path(const std::string& p)
  86 {
  87   init(p.data(), p.length());
  88 }
  89
  90 bool operator==(const endpoint& e1, const endpoint& e2)
  91 {
  92   return e1.path() == e2.path();
  93 }
  94
  95 bool operator<(const endpoint& e1, const endpoint& e2)
  96 {
  97   return e1.path() < e2.path();
  98 }
  99
 100 void endpoint::init(const char* path_name, std::size_t path_length)
 101 {
 102   if (path_length > sizeof(data_.local.sun_path) - 1)
 103   {
 104     // The buffer is not large enough to store this address.
 105     boost::system::error_code ec(boost::asio::error::name_too_long);
 106     boost::asio::detail::throw_error(ec);
 107   }
 108
 109   using namespace std; // For memcpy.
 110   data_.local = boost::asio::detail::sockaddr_un_type();
 111   data_.local.sun_family = AF_UNIX;
 112   memcpy(data_.local.sun_path, path_name, path_length);
 113   path_length_ = path_length;
 114
 115   // NUL-terminate normal path names. Names that start with a NUL are in the
 116   // UNIX domain protocol's "abstract namespace" and are not NUL-terminated.
 117   if (path_length > 0 && data_.local.sun_path[0] == 0)
 118     data_.local.sun_path[path_length] = 0;
 119 }
 120
 121 } // namespace detail
 122 } // namespace local
 123 } // namespace asio
 124 } // namespace boost
 125
 126 #include <boost/asio/detail/pop_options.hpp>
 127
 128 #endif // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS)
 129
 130 #endif // BOOST_ASIO_LOCAL_DETAIL_IMPL_ENDPOINT_IPP