. /include/boost/corosio /native /native_udp.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_udp.hpp  
11 -  
12 - Inline UDP 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/udp.hpp>` (`boost::corosio::udp`).  
20 -  
21 - Both variants satisfy the same protocol-type interface and work  
22 - interchangeably with `udp_socket::open`.  
23 -  
24 - @see boost::corosio::udp  
25 - */  
26 -  
27 - #ifndef BOOST_COROSIO_NATIVE_NATIVE_UDP_HPP  
28 - #define BOOST_COROSIO_NATIVE_NATIVE_UDP_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 udp_socket;  
41 -  
42 - } // namespace boost::corosio  
43 -  
44 - namespace boost::corosio {  
45 -  
46 - /** Inline UDP protocol type with platform constants.  
47 -  
48 - Same shape as @ref boost::corosio::udp but with inline  
49 - `family()`, `type()`, and `protocol()` methods that  
50 - resolve to compile-time constants.  
51 -  
52 - @see boost::corosio::udp  
53 - */  
54 - class native_udp  
55 - {  
56 - bool v6_;  
DCB 57 - 327 explicit constexpr native_udp(bool v6) noexcept : v6_(v6) {}  
58 -  
59 - public:  
60 - /// Construct an IPv4 UDP protocol.  
DCB 61 - 303 static constexpr native_udp v4() noexcept  
62 - {  
DCB 63 - 303 return native_udp(false);  
64 - }  
65 -  
66 - /// Construct an IPv6 UDP protocol.  
DCB 67 - 24 static constexpr native_udp v6() noexcept  
68 - {  
DCB 69 - 24 return native_udp(true);  
70 - }  
71 -  
72 - /// Return true if this is IPv6.  
73 - constexpr bool is_v6() const noexcept  
74 - {  
75 - return v6_;  
76 - }  
77 -  
78 - /// Return the address family (AF_INET or AF_INET6).  
DCB 79 - 327 int family() const noexcept  
80 - {  
DCB 81 - 327 return v6_ ? AF_INET6 : AF_INET;  
82 - }  
83 -  
84 - /// Return the socket type (SOCK_DGRAM).  
DCB 85 - 327 static constexpr int type() noexcept  
86 - {  
DCB 87 - 327 return SOCK_DGRAM;  
88 - }  
89 -  
90 - /// Return the IP protocol (IPPROTO_UDP).  
DCB 91 - 327 static constexpr int protocol() noexcept  
92 - {  
DCB 93 - 327 return IPPROTO_UDP;  
94 - }  
95 -  
96 - /// The associated socket type.  
97 - using socket = udp_socket;  
98 -  
99 - friend constexpr bool operator==(native_udp a, native_udp b) noexcept  
100 - {  
101 - return a.v6_ == b.v6_;  
102 - }  
103 -  
104 - friend constexpr bool operator!=(native_udp a, native_udp b) noexcept  
105 - {  
106 - return a.v6_ != b.v6_;  
107 - }  
108 - };  
109 -  
110 - } // namespace boost::corosio  
111 -  
112 - #endif // BOOST_COROSIO_NATIVE_NATIVE_UDP_HPP