1//
2// local/detail/impl/endpoint.hpp
3// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2015 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 ASIO_LOCAL_DETAIL_IMPL_ENDPOINT_IPP
13#define ASIO_LOCAL_DETAIL_IMPL_ENDPOINT_IPP
14
15
16#include "asio/detail/config.hpp"
17
18
19#include <cstring>
20#include "asio/detail/socket_ops.hpp"
21#include "asio/detail/throw_error.hpp"
22#include "asio/error.hpp"
23#include "asio/local/detail/endpoint.hpp"
24
25#include "asio/detail/push_options.hpp"
26
27namespace asio {
28namespace local {
29namespace detail {
30
31endpoint::endpoint()
32{
33  init("", 0);
34}
35
36endpoint::endpoint(const char* path_name)
37{
38  using namespace std; // For strlen.
39  init(path_name, strlen(path_name));
40}
41
42endpoint::endpoint(const std::string& path_name)
43{
44  init(path_name.data(), path_name.length());
45}
46
47void endpoint::resize(std::size_t new_size)
48{
49  if (new_size > sizeof(asio::detail::sockaddr_un_type))
50  {
51    asio::error_code ec(asio::error::invalid_argument);
52    asio::detail::throw_error(ec);
53  }
54  else if (new_size == 0)
55  {
56    path_length_ = 0;
57  }
58  else
59  {
60    path_length_ = new_size
61      - offsetof(asio::detail::sockaddr_un_type, sun_path);
62
63    // The path returned by the operating system may be NUL-terminated.
64    if (path_length_ > 0 && data_.local.sun_path[path_length_ - 1] == 0)
65      --path_length_;
66  }
67}
68
69std::string endpoint::path() const
70{
71  return std::string(data_.local.sun_path, path_length_);
72}
73
74void endpoint::path(const char* p)
75{
76  using namespace std; // For strlen.
77  init(p, strlen(p));
78}
79
80void endpoint::path(const std::string& p)
81{
82  init(p.data(), p.length());
83}
84
85bool operator==(const endpoint& e1, const endpoint& e2)
86{
87  return e1.path() == e2.path();
88}
89
90bool operator<(const endpoint& e1, const endpoint& e2)
91{
92  return e1.path() < e2.path();
93}
94
95void endpoint::init(const char* path_name, std::size_t path_length)
96{
97  if (path_length > sizeof(data_.local.sun_path) - 1)
98  {
99    // The buffer is not large enough to store this address.
100    asio::error_code ec(asio::error::name_too_long);
101    asio::detail::throw_error(ec);
102  }
103
104  using namespace std; // For memcpy.
105  data_.local = asio::detail::sockaddr_un_type();
106  data_.local.sun_family = AF_UNIX;
107  memcpy(data_.local.sun_path, path_name, path_length);
108  path_length_ = path_length;
109
110  // NUL-terminate normal path names. Names that start with a NUL are in the
111  // UNIX domain protocol's "abstract namespace" and are not NUL-terminated.
112  if (path_length > 0 && data_.local.sun_path[0] == 0)
113    data_.local.sun_path[path_length] = 0;
114}
115
116} // namespace detail
117} // namespace local
118} // namespace asio
119
120#include "asio/detail/pop_options.hpp"
121
122
123#endif // ASIO_LOCAL_DETAIL_IMPL_ENDPOINT_IPP
124