mirror of
https://github.com/matrix-construct/construct
synced 2024-11-16 06:51:08 +01:00
72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
// Matrix Construct
|
|
//
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_NET_DNS_H
|
|
|
|
namespace ircd::net
|
|
{
|
|
struct dns extern dns;
|
|
}
|
|
|
|
/// DNS resolution suite.
|
|
///
|
|
/// This is a singleton class; public usage is to make calls on the singleton
|
|
/// object like `ircd::net::dns()` etc.
|
|
///
|
|
struct ircd::net::dns
|
|
{
|
|
struct opts;
|
|
struct resolver;
|
|
|
|
struct resolver static *resolver;
|
|
struct opts static const opts_default;
|
|
|
|
public:
|
|
using callback = std::function<void (std::exception_ptr, vector_view<const rfc1035::record *>)>;
|
|
using callback_A_one = std::function<void (std::exception_ptr, const rfc1035::record::A &)>;
|
|
using callback_SRV_one = std::function<void (std::exception_ptr, const rfc1035::record::SRV &)>;
|
|
using callback_ipport_one = std::function<void (std::exception_ptr, const ipport &)>;
|
|
|
|
// Callback-based interface
|
|
void operator()(const hostport &, const opts &, callback);
|
|
void operator()(const hostport &, const opts &, callback_A_one);
|
|
void operator()(const hostport &, const opts &, callback_SRV_one);
|
|
void operator()(const hostport &, const opts &, callback_ipport_one);
|
|
|
|
// Callback-based interface (default options)
|
|
template<class Callback> void operator()(const hostport &, Callback&&);
|
|
};
|
|
|
|
/// DNS resolution options
|
|
struct ircd::net::dns::opts
|
|
{
|
|
/// Overrides the SRV query to make for this resolution. If empty an
|
|
/// SRV query may still be made from other deductions. This string is
|
|
/// copied at the start of the resolution. It must be a fully qualified
|
|
/// SRV query string: Example: "_matrix._tcp."
|
|
string_view srv;
|
|
|
|
/// Specifies the SRV protocol part when deducing the SRV query to be
|
|
/// made. This is used when the net::hostport.service string is just
|
|
/// the name of the service like "matrix" so we then use this value
|
|
/// to build the protocol part of the SRV query string. It is ignored
|
|
/// if `srv` is set or if no service is specified (thus no SRV query is
|
|
/// made in the first place).
|
|
string_view proto{"tcp"};
|
|
};
|
|
|
|
template<class Callback>
|
|
void
|
|
ircd::net::dns::operator()(const hostport &hostport,
|
|
Callback&& callback)
|
|
{
|
|
operator()(hostport, opts_default, std::forward<Callback>(callback));
|
|
}
|