1// 2// local/detail/impl/endpoint.hpp 3// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4// 5// Copyright (c) 2003-2020 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 31namespace boost { 32namespace asio { 33namespace local { 34namespace detail { 35 36endpoint::endpoint() 37{ 38 init("", 0); 39} 40 41endpoint::endpoint(const char* path_name) 42{ 43 using namespace std; // For strlen. 44 init(path_name, strlen(path_name)); 45} 46 47endpoint::endpoint(const std::string& path_name) 48{ 49 init(path_name.data(), path_name.length()); 50} 51 52#if defined(BOOST_ASIO_HAS_STRING_VIEW) 53endpoint::endpoint(string_view path_name) 54{ 55 init(path_name.data(), path_name.length()); 56} 57#endif // defined(BOOST_ASIO_HAS_STRING_VIEW) 58 59void endpoint::resize(std::size_t new_size) 60{ 61 if (new_size > sizeof(boost::asio::detail::sockaddr_un_type)) 62 { 63 boost::system::error_code ec(boost::asio::error::invalid_argument); 64 boost::asio::detail::throw_error(ec); 65 } 66 else if (new_size == 0) 67 { 68 path_length_ = 0; 69 } 70 else 71 { 72 path_length_ = new_size 73 - offsetof(boost::asio::detail::sockaddr_un_type, sun_path); 74 75 // The path returned by the operating system may be NUL-terminated. 76 if (path_length_ > 0 && data_.local.sun_path[path_length_ - 1] == 0) 77 --path_length_; 78 } 79} 80 81std::string endpoint::path() const 82{ 83 return std::string(data_.local.sun_path, path_length_); 84} 85 86void endpoint::path(const char* p) 87{ 88 using namespace std; // For strlen. 89 init(p, strlen(p)); 90} 91 92void endpoint::path(const std::string& p) 93{ 94 init(p.data(), p.length()); 95} 96 97bool operator==(const endpoint& e1, const endpoint& e2) 98{ 99 return e1.path() == e2.path(); 100} 101 102bool operator<(const endpoint& e1, const endpoint& e2) 103{ 104 return e1.path() < e2.path(); 105} 106 107void endpoint::init(const char* path_name, std::size_t path_length) 108{ 109 if (path_length > sizeof(data_.local.sun_path) - 1) 110 { 111 // The buffer is not large enough to store this address. 112 boost::system::error_code ec(boost::asio::error::name_too_long); 113 boost::asio::detail::throw_error(ec); 114 } 115 116 using namespace std; // For memcpy. 117 data_.local = boost::asio::detail::sockaddr_un_type(); 118 data_.local.sun_family = AF_UNIX; 119 if (path_length > 0) 120 memcpy(data_.local.sun_path, path_name, path_length); 121 path_length_ = path_length; 122 123 // NUL-terminate normal path names. Names that start with a NUL are in the 124 // UNIX domain protocol's "abstract namespace" and are not NUL-terminated. 125 if (path_length > 0 && data_.local.sun_path[0] == 0) 126 data_.local.sun_path[path_length] = 0; 127} 128 129} // namespace detail 130} // namespace local 131} // namespace asio 132} // namespace boost 133 134#include <boost/asio/detail/pop_options.hpp> 135 136#endif // defined(BOOST_ASIO_HAS_LOCAL_SOCKETS) 137 138#endif // BOOST_ASIO_LOCAL_DETAIL_IMPL_ENDPOINT_IPP 139