. /include/boost/corosio /native /native_tcp.hpp
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1 - //  
2 - // Copyright (c) 2026 Steve Gerbino  
3 - //  
4 - // Distributed under the Boost Software License, Version 1.0. (See accompanying  
5 - // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)  
6 - //  
7 - // Official repository: https://github.com/cppalliance/corosio  
8 - //  
9 -  
10 - /** @file native_tcp.hpp  
11 -  
12 - Inline TCP protocol type using platform-specific constants.  
13 - All methods are `constexpr` or trivially inlined, giving zero  
14 - overhead compared to hand-written socket creation calls.  
15 -  
16 - This header includes platform socket headers  
17 - (`<sys/socket.h>`, `<netinet/in.h>`, etc.).  
18 - For a version that avoids platform includes, use  
19 - `<boost/corosio/tcp.hpp>` (`boost::corosio::tcp`).  
20 -  
21 - Both variants satisfy the same protocol-type interface and work  
22 - interchangeably with `tcp_socket::open` / `tcp_acceptor::open`.  
23 -  
24 - @see boost::corosio::tcp  
25 - */  
26 -  
27 - #ifndef BOOST_COROSIO_NATIVE_NATIVE_TCP_HPP  
28 - #define BOOST_COROSIO_NATIVE_NATIVE_TCP_HPP  
29 -  
30 - #ifdef _WIN32  
31 - #include <winsock2.h>  
32 - #include <ws2tcpip.h>  
33 - #else  
34 - #include <netinet/in.h>  
35 - #include <sys/socket.h>  
36 - #endif  
37 -  
38 - namespace boost::corosio {  
39 -  
40 - class tcp_socket;  
41 - class tcp_acceptor;  
42 -  
43 - } // namespace boost::corosio  
44 -  
45 - namespace boost::corosio {  
46 -  
47 - /** Inline TCP protocol type with platform constants.  
48 -  
49 - Same shape as @ref boost::corosio::tcp but with inline  
50 - `family()`, `type()`, and `protocol()` methods that  
51 - resolve to compile-time constants.  
52 -  
53 - @see boost::corosio::tcp  
54 - */  
55 - class native_tcp  
56 - {  
57 - bool v6_;  
DCB 58 - 5145 explicit constexpr native_tcp(bool v6) noexcept : v6_(v6) {}  
59 -  
60 - public:  
61 - /// Construct an IPv4 TCP protocol.  
DCB 62 - 5103 static constexpr native_tcp v4() noexcept  
63 - {  
DCB 64 - 5103 return native_tcp(false);  
65 - }  
66 -  
67 - /// Construct an IPv6 TCP protocol.  
DCB 68 - 42 static constexpr native_tcp v6() noexcept  
69 - {  
DCB 70 - 42 return native_tcp(true);  
71 - }  
72 -  
73 - /// Return true if this is IPv6.  
74 - constexpr bool is_v6() const noexcept  
75 - {  
76 - return v6_;  
77 - }  
78 -  
79 - /// Return the address family (AF_INET or AF_INET6).  
DCB 80 - 5145 int family() const noexcept  
81 - {  
DCB 82 - 5145 return v6_ ? AF_INET6 : AF_INET;  
83 - }  
84 -  
85 - /// Return the socket type (SOCK_STREAM).  
DCB 86 - 5145 static constexpr int type() noexcept  
87 - {  
DCB 88 - 5145 return SOCK_STREAM;  
89 - }  
90 -  
91 - /// Return the IP protocol (IPPROTO_TCP).  
DCB 92 - 5145 static constexpr int protocol() noexcept  
93 - {  
DCB 94 - 5145 return IPPROTO_TCP;  
95 - }  
96 -  
97 - /// The associated socket type.  
98 - using socket = tcp_socket;  
99 -  
100 - /// The associated acceptor type.  
101 - using acceptor = tcp_acceptor;  
102 -  
103 - friend constexpr bool operator==(native_tcp a, native_tcp b) noexcept  
104 - {  
105 - return a.v6_ == b.v6_;  
106 - }  
107 -  
108 - friend constexpr bool operator!=(native_tcp a, native_tcp b) noexcept  
109 - {  
110 - return a.v6_ != b.v6_;  
111 - }  
112 - };  
113 -  
114 - } // namespace boost::corosio  
115 -  
116 - #endif // BOOST_COROSIO_NATIVE_NATIVE_TCP_HPP