mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-20 13:33:07 +00:00
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
|
/*
|
||
|
|
* ZeroTier One - Network Virtualization Everywhere
|
||
|
|
* Copyright (C) 2011-2015 ZeroTier, Inc.
|
||
|
|
*
|
||
|
|
* This program is free 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
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
* --
|
||
|
|
*
|
||
|
|
* ZeroTier may be used and distributed under the terms of the GPLv3, which
|
||
|
|
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
|
||
|
|
*
|
||
|
|
* If you would like to embed ZeroTier into a commercial application or
|
||
|
|
* redistribute it in a modified binary form, please contact ZeroTier Networks
|
||
|
|
* LLC. Start here: http://www.zerotier.com/
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef ZT_DEFERREDPACKETS_HPP
|
||
|
|
#define ZT_DEFERREDPACKETS_HPP
|
||
|
|
|
||
|
|
#include "Constants.hpp"
|
||
|
|
#include "SharedPtr.hpp"
|
||
|
|
#include "Mutex.hpp"
|
||
|
|
#include "DeferredPackets.hpp"
|
||
|
|
#include "BinarySemaphore.hpp"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Maximum number of deferred packets
|
||
|
|
*/
|
||
|
|
#define ZT_DEFFEREDPACKETS_MAX 1024
|
||
|
|
|
||
|
|
namespace ZeroTier {
|
||
|
|
|
||
|
|
class IncomingPacket;
|
||
|
|
class RuntimeEnvironment;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Deferred packets
|
||
|
|
*
|
||
|
|
* IncomingPacket can defer its decoding this way by enqueueing itself here.
|
||
|
|
* When this is done, deferredDecode() is called later. This is done for
|
||
|
|
* operations that may be expensive to allow them to potentially be handled
|
||
|
|
* in the background or rate limited to maintain quality of service for more
|
||
|
|
* routine operations.
|
||
|
|
*/
|
||
|
|
class DeferredPackets
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
DeferredPackets(const RuntimeEnvironment *renv);
|
||
|
|
~DeferredPackets();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Enqueue a packet
|
||
|
|
*
|
||
|
|
* Since packets enqueue themselves, they call it with 'this' and we wrap
|
||
|
|
* them in a SharedPtr<>. This is safe as SharedPtr<> is introspective and
|
||
|
|
* supports this. This should not be called from any other code outside
|
||
|
|
* IncomingPacket.
|
||
|
|
*
|
||
|
|
* @param pkt Packet to process later (possibly in the background)
|
||
|
|
* @return False if queue is full
|
||
|
|
*/
|
||
|
|
bool enqueue(IncomingPacket *pkt);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Wait for and then process a deferred packet
|
||
|
|
*
|
||
|
|
* If we are shutting down (in destructor), this returns -1 and should
|
||
|
|
* not be called again. Otherwise it returns the number of packets
|
||
|
|
* processed.
|
||
|
|
*
|
||
|
|
* @return Number processed or -1 if shutting down
|
||
|
|
*/
|
||
|
|
int process();
|
||
|
|
|
||
|
|
private:
|
||
|
|
SharedPtr<IncomingPacket> _q[ZT_DEFFEREDPACKETS_MAX];
|
||
|
|
const RuntimeEnvironment *const RR;
|
||
|
|
unsigned long _readPtr;
|
||
|
|
unsigned long _writePtr;
|
||
|
|
bool _die;
|
||
|
|
Mutex _q_m;
|
||
|
|
BinarySemaphore _q_s;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace ZeroTier
|
||
|
|
|
||
|
|
#endif
|