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construct/include/ircd/net/resolve.h
2018-01-04 17:44:34 -08:00

53 lines
2 KiB
C++

/*
* Copyright (C) 2017 Charybdis Development Team
* Copyright (C) 2017 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#define HAVE_IRCD_NET_RESOLVE_H
namespace ircd::net
{
struct resolve extern resolve;
}
/// DNS resolution suite.
///
/// This is a singleton class; public usage is to make calls on the singleton
/// object like `ircd::net::resolve()` etc.
///
struct ircd::net::resolve
{
// Internal resolver service instance
struct resolver static resolver;
public:
using callback_one = std::function<void (std::exception_ptr, const ipport &)>;
using callback_many = std::function<void (std::exception_ptr, std::vector<ipport>)>;
using callback_reverse = std::function<void (std::exception_ptr, std::string)>;
// Callback-based interface
void operator()(const hostport &, callback_one);
void operator()(const hostport &, callback_many);
void operator()(const ipport &, callback_reverse);
// Future-based interface
ctx::future<ipport> operator()(const hostport &);
ctx::future<std::string> operator()(const ipport &);
};