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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 |