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qTox/src/toxdns.h
2014-11-09 13:14:21 +01:00

62 lines
2.0 KiB
C++

/*
Copyright (C) 2014 by Project Tox <https://tox.im>
This file is part of qTox, a Qt-based graphical interface for Tox.
This program is libre software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the COPYING file for more details.
*/
#ifndef QTOXDNS_H
#define QTOXDNS_H
#include "src/corestructs.h"
#include <QDnsLookup>
#include <QObject>
/// Handles tox1 and tox3 DNS queries
class ToxDNS : public QObject
{
Q_OBJECT
public:
struct tox3_server ///< Represents a tox3 server
{
tox3_server()=default;
tox3_server(const char* _name, uint8_t _pk[32]):name{_name},pubkey{_pk}{}
const char* name; ///< Hostname of the server, e.g. toxme.se
uint8_t* pubkey; ///< Public key of the tox3 server, usually 256bit long
};
public:
/// Tries to map a text string to a ToxID struct, will query Tox DNS records if necessary
static ToxID resolveToxAddress(const QString& address, bool silent=true);
static QString queryTox1(const QString& record, bool silent=true); ///< Record should look like user@domain.tld
static QString queryTox3(const tox3_server& server, const QString& record, bool silent=true); ///< Record should look like user@domain.tld, may fallback on queryTox1
protected:
static void showWarning(const QString& message);
ToxDNS()=default;
private:
/// Try to fetch the first entry of the given TXT record
/// Returns an empty object on failure. May block for up to ~3s
/// May display message boxes on error if silent if false
static QByteArray fetchLastTextRecord(const QString& record, bool silent=true);
public:
static const tox3_server pinnedServers[2];
};
#endif // QTOXDNS_H