TLA  Line data    Source code

       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                 : #ifndef BOOST_COROSIO_TCP_HPP
      11                 : #define BOOST_COROSIO_TCP_HPP
      12                 : 
      13                 : #include <boost/corosio/detail/config.hpp>
      14                 : 
      15                 : namespace boost::corosio {
      16                 : 
      17                 : class tcp_socket;
      18                 : class tcp_acceptor;
      19                 : 
      20                 : /** Encapsulate the TCP protocol for socket creation.
      21                 : 
      22                 :     This class identifies the TCP protocol and its address family
      23                 :     (IPv4 or IPv6). It is used to parameterize socket and acceptor
      24                 :     `open()` calls with a self-documenting type.
      25                 : 
      26                 :     The `family()`, `type()`, and `protocol()` members return the
      27                 :     three integers passed to the operating system's `socket()`
      28                 :     call. Their values are platform-defined constants taken from
      29                 :     the system socket headers. For an inline variant that includes
      30                 :     those headers, use @ref native_tcp.
      31                 : 
      32                 :     @par Example
      33                 :     @code
      34                 :     tcp_acceptor acc( ioc );
      35                 :     acc.open( tcp::v6() );  // IPv6 socket
      36                 :     acc.set_option( socket_option::reuse_address( true ) );
      37                 :     acc.bind( endpoint( ipv6_address::any(), 8080 ) );
      38                 :     acc.listen();
      39                 :     @endcode
      40                 : 
      41                 :     @see native_tcp, tcp_socket, tcp_acceptor
      42                 : */
      43                 : class BOOST_COROSIO_DECL tcp
      44                 : {
      45                 :     bool v6_;
      46 HIT        2250 :     explicit constexpr tcp(bool v6) noexcept : v6_(v6) {}
      47                 : 
      48                 : public:
      49                 :     /// Construct an IPv4 TCP protocol.
      50            2206 :     static constexpr tcp v4() noexcept
      51                 :     {
      52            2206 :         return tcp(false);
      53                 :     }
      54                 : 
      55                 :     /// Construct an IPv6 TCP protocol.
      56              44 :     static constexpr tcp v6() noexcept
      57                 :     {
      58              44 :         return tcp(true);
      59                 :     }
      60                 : 
      61                 :     /// Return true if this is IPv6.
      62                 :     constexpr bool is_v6() const noexcept
      63                 :     {
      64                 :         return v6_;
      65                 :     }
      66                 : 
      67                 :     /// Return the address family (AF_INET or AF_INET6).
      68                 :     int family() const noexcept;
      69                 : 
      70                 :     /// Return the socket type (SOCK_STREAM).
      71                 :     static int type() noexcept;
      72                 : 
      73                 :     /// Return the IP protocol (IPPROTO_TCP).
      74                 :     static int protocol() noexcept;
      75                 : 
      76                 :     /// The socket type to use with this protocol, @ref tcp_socket.
      77                 :     using socket = tcp_socket;
      78                 : 
      79                 :     /// The acceptor type to use with this protocol, @ref tcp_acceptor.
      80                 :     using acceptor = tcp_acceptor;
      81                 : 
      82                 :     /// Test for equality.
      83              12 :     friend constexpr bool operator==(tcp a, tcp b) noexcept
      84                 :     {
      85              12 :         return a.v6_ == b.v6_;
      86                 :     }
      87                 : 
      88                 :     /// Test for inequality.
      89                 :     friend constexpr bool operator!=(tcp a, tcp b) noexcept
      90                 :     {
      91                 :         return a.v6_ != b.v6_;
      92                 :     }
      93                 : };
      94                 : 
      95                 : } // namespace boost::corosio
      96                 : 
      97                 : #endif // BOOST_COROSIO_TCP_HPP