src/corosio/src/detail/open_listener.hpp
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| Line | TLA | Hits | 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_SRC_DETAIL_OPEN_LISTENER_HPP | ||
| 11 | #define BOOST_COROSIO_SRC_DETAIL_OPEN_LISTENER_HPP | ||
| 12 | |||
| 13 | #include <boost/corosio/detail/platform.hpp> | ||
| 14 | #include <boost/corosio/endpoint.hpp> | ||
| 15 | #include <boost/corosio/socket_option.hpp> | ||
| 16 | #include <boost/corosio/tcp_acceptor.hpp> | ||
| 17 | |||
| 18 | #if BOOST_COROSIO_HAS_IOCP | ||
| 19 | #include <boost/corosio/native/detail/iocp/win_windows.hpp> | ||
| 20 | #endif | ||
| 21 | |||
| 22 | #include <cstddef> | ||
| 23 | #include <system_error> | ||
| 24 | |||
| 25 | namespace boost::corosio::detail { | ||
| 26 | |||
| 27 | #if BOOST_COROSIO_HAS_IOCP | ||
| 28 | // On Windows SO_REUSEADDR grants bind-over ("hijack") rights instead | ||
| 29 | // of TIME_WAIT reuse, so a second listener would share the port | ||
| 30 | // silently. SO_EXCLUSIVEADDRUSE restores the POSIX contract: the | ||
| 31 | // collision surfaces as WSAEADDRINUSE (errc::address_in_use). | ||
| 32 | struct exclusive_address_use | ||
| 33 | { | ||
| 34 | int value_ = 1; | ||
| 35 | |||
| 36 | static int level(family) noexcept | ||
| 37 | { | ||
| 38 | return SOL_SOCKET; | ||
| 39 | } | ||
| 40 | static int name(family) noexcept | ||
| 41 | { | ||
| 42 | return SO_EXCLUSIVEADDRUSE; | ||
| 43 | } | ||
| 44 | void const* data(family) const noexcept | ||
| 45 | { | ||
| 46 | return &value_; | ||
| 47 | } | ||
| 48 | std::size_t size(family) const noexcept | ||
| 49 | { | ||
| 50 | return sizeof(value_); | ||
| 51 | } | ||
| 52 | }; | ||
| 53 | #endif | ||
| 54 | |||
| 55 | // Open, configure address reuse, bind and listen, stopping at the | ||
| 56 | // first failing step. | ||
| 57 | inline std::error_code | ||
| 58 | 204x | open_listener(tcp_acceptor& acc, endpoint ep, int backlog) noexcept | |
| 59 | { | ||
| 60 | 204x | if (auto ec = acc.open(ep.address().family())) | |
| 61 | 2x | return ec; | |
| 62 | #if BOOST_COROSIO_HAS_IOCP | ||
| 63 | if (auto ec = acc.set_option(exclusive_address_use{})) | ||
| 64 | return ec; | ||
| 65 | #else | ||
| 66 | 202x | if (auto ec = acc.set_option(socket_option::reuse_address(true))) | |
| 67 | ✗ | return ec; | |
| 68 | #endif | ||
| 69 | 202x | if (auto ec = acc.bind(ep)) | |
| 70 | 8x | return ec; | |
| 71 | 194x | return acc.listen(backlog); | |
| 72 | } | ||
| 73 | |||
| 74 | } // namespace boost::corosio::detail | ||
| 75 | |||
| 76 | #endif | ||
| 77 |