transmission/libtransmission/natpmp_local.h

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// This file Copyright © 2007-2022 Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
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#pragma once
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
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#include <ctime> // time_t
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#include <cstdint>
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#include "transmission.h" // tr_port_forwarding
#include "natpmp.h"
#include "net.h" // tr_port
class tr_natpmp
{
public:
tr_natpmp()
{
natpmp_.s = static_cast<decltype(natpmp_.s)>(TR_BAD_SOCKET);
}
~tr_natpmp()
{
closenatpmp(&natpmp_);
}
[[nodiscard]] constexpr auto renewTime() const noexcept
{
return renew_time_;
}
tr_port_forwarding pulse(tr_port port, bool is_enabled, tr_port* public_port, tr_port* real_private_port);
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private:
enum tr_natpmp_state
{
TR_NATPMP_IDLE,
TR_NATPMP_ERR,
TR_NATPMP_DISCOVER,
TR_NATPMP_RECV_PUB,
TR_NATPMP_SEND_MAP,
TR_NATPMP_RECV_MAP,
TR_NATPMP_SEND_UNMAP,
TR_NATPMP_RECV_UNMAP
};
static constexpr auto LifetimeSecs = uint32_t{ 3600 };
static constexpr auto CommandWaitSecs = time_t{ 8 };
[[nodiscard]] bool canSendCommand() const;
void setCommandTime();
natpmp_t natpmp_ = {};
tr_port public_port_ = {};
tr_port private_port_ = {};
time_t renew_time_ = 0;
time_t command_time_ = 0;
tr_natpmp_state state_ = TR_NATPMP_DISCOVER;
bool has_discovered_ = false;
bool is_mapped_ = false;
};