mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 14:52:24 +00:00
136 lines
4.8 KiB
C++
136 lines
4.8 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_INCOMINGPACKET_HPP
|
|
#define ZT_INCOMINGPACKET_HPP
|
|
|
|
#include <stdexcept>
|
|
|
|
#include "Packet.hpp"
|
|
#include "InetAddress.hpp"
|
|
#include "Utils.hpp"
|
|
#include "SharedPtr.hpp"
|
|
#include "AtomicCounter.hpp"
|
|
#include "MulticastGroup.hpp"
|
|
#include "Peer.hpp"
|
|
|
|
/*
|
|
* The big picture:
|
|
*
|
|
* tryDecode gets called for a given fully-assembled packet until it returns
|
|
* true or the packet's time to live has been exceeded, in which case it is
|
|
* discarded as failed decode. Any exception thrown by tryDecode also causes
|
|
* the packet to be discarded.
|
|
*
|
|
* Thus a return of false from tryDecode() indicates that it should be called
|
|
* again. Logic is very simple as to when, and it's in doAnythingWaitingForPeer
|
|
* in Switch. This might be expanded to be more fine grained in the future.
|
|
*
|
|
* A return value of true indicates that the packet is done. tryDecode must
|
|
* never be called again after that.
|
|
*/
|
|
|
|
namespace ZeroTier {
|
|
|
|
class RuntimeEnvironment;
|
|
class Network;
|
|
|
|
/**
|
|
* Subclass of packet that handles the decoding of it
|
|
*/
|
|
class IncomingPacket : public Packet
|
|
{
|
|
friend class SharedPtr<IncomingPacket>;
|
|
|
|
public:
|
|
/**
|
|
* Create a new packet-in-decode
|
|
*
|
|
* @param data Packet data
|
|
* @param len Packet length
|
|
* @param remoteAddress Address from which packet came
|
|
* @param now Current time
|
|
* @throws std::out_of_range Range error processing packet
|
|
*/
|
|
IncomingPacket(const void *data,unsigned int len,const InetAddress &remoteAddress,uint64_t now) :
|
|
Packet(data,len),
|
|
_receiveTime(now),
|
|
_remoteAddress(remoteAddress),
|
|
__refCount()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Attempt to decode this packet
|
|
*
|
|
* Note that this returns 'true' if processing is complete. This says nothing
|
|
* about whether the packet was valid. A rejection is 'complete.'
|
|
*
|
|
* Once true is returned, this must not be called again. The packet's state
|
|
* may no longer be valid.
|
|
*
|
|
* @param RR Runtime environment
|
|
* @return True if decoding and processing is complete, false if caller should try again
|
|
* @throws std::out_of_range Range error processing packet (should be discarded)
|
|
* @throws std::runtime_error Other error processing packet (should be discarded)
|
|
*/
|
|
bool tryDecode(const RuntimeEnvironment *RR);
|
|
|
|
/**
|
|
* @return Time of packet receipt / start of decode
|
|
*/
|
|
inline uint64_t receiveTime() const throw() { return _receiveTime; }
|
|
|
|
private:
|
|
// These are called internally to handle packet contents once it has
|
|
// been authenticated, decrypted, decompressed, and classified.
|
|
bool _doERROR(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doHELLO(const RuntimeEnvironment *RR);
|
|
bool _doOK(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doWHOIS(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doRENDEZVOUS(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doFRAME(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doEXT_FRAME(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doMULTICAST_LIKE(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doNETWORK_MEMBERSHIP_CERTIFICATE(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doNETWORK_CONFIG_REQUEST(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doNETWORK_CONFIG_REFRESH(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doMULTICAST_GATHER(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
bool _doMULTICAST_FRAME(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer);
|
|
|
|
// Send an ERROR_NEED_MEMBERSHIP_CERTIFICATE to a peer indicating that an updated cert is needed to join
|
|
void _sendErrorNeedCertificate(const RuntimeEnvironment *RR,const SharedPtr<Peer> &peer,uint64_t nwid);
|
|
|
|
uint64_t _receiveTime;
|
|
InetAddress _remoteAddress;
|
|
AtomicCounter __refCount;
|
|
};
|
|
|
|
} // namespace ZeroTier
|
|
|
|
#endif
|