mirror of
https://github.com/matrix-construct/construct
synced 2024-10-31 02:48:58 +01:00
55 lines
2 KiB
C++
55 lines
2 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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/// (internal) DNS cache
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namespace ircd::net::dns::cache
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{
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struct waiter;
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using closure = std::function<bool (const string_view &, const json::object &)>;
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extern conf::item<seconds> min_ttl;
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extern conf::item<seconds> error_ttl;
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extern conf::item<seconds> nxdomain_ttl;
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extern ctx::dock dock;
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extern ctx::mutex mutex;
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extern std::list<waiter> waiting;
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bool operator==(const waiter &, const waiter &) noexcept;
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bool operator!=(const waiter &, const waiter &) noexcept;
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string_view make_type(const mutable_buffer &out, const string_view &);
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string_view make_type(const mutable_buffer &out, const uint16_t &);
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bool for_each(const string_view &type, const closure &); // do not make_type() here
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bool for_each(const hostport &, const opts &, const closure &);
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bool get(const hostport &, const opts &, const callback &);
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bool put(const hostport &, const opts &, const records &);
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bool put(const hostport &, const opts &, const uint &code, const string_view &msg = {});
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}
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/// DNS cache result waiter
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struct ircd::net::dns::cache::waiter
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{
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dns::callback callback;
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dns::opts opts;
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uint16_t port;
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string_view key;
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char keybuf[rfc1035::NAME_BUFSIZE*2];
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waiter(const hostport &hp, const dns::opts &opts, dns::callback &&callback);
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waiter(waiter &&) = delete;
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waiter(const waiter &) = delete;
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waiter &operator=(waiter &&) = delete;
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waiter &operator=(const waiter &) = delete;
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static bool call(waiter &, const uint16_t &type, const string_view &tgt, const json::array &rrs);
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static size_t call(const uint16_t &type, const string_view &tgt, const json::array &rrs);
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};
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