mirror of
https://github.com/zerotier/ZeroTierOne.git
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148 lines
5.2 KiB
C++
148 lines
5.2 KiB
C++
/*
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* Copyright (c)2013-2020 ZeroTier, Inc.
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file in the project's root directory.
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*
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* Change Date: 2026-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2.0 of the Apache License.
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*/
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/****/
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#ifndef ZT_INCOMINGPACKET_HPP
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#define ZT_INCOMINGPACKET_HPP
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#include <stdexcept>
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#include "Packet.hpp"
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#include "Path.hpp"
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#include "Utils.hpp"
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#include "MulticastGroup.hpp"
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#include "Peer.hpp"
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/*
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* The big picture:
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*
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* tryDecode gets called for a given fully-assembled packet until it returns
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* true or the packet's time to live has been exceeded, in which case it is
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* discarded as failed decode. Any exception thrown by tryDecode also causes
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* the packet to be discarded.
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*
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* Thus a return of false from tryDecode() indicates that it should be called
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* again. Logic is very simple as to when, and it's in doAnythingWaitingForPeer
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* in Switch. This might be expanded to be more fine grained in the future.
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*
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* A return value of true indicates that the packet is done. tryDecode must
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* never be called again after that.
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*/
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namespace ZeroTier {
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class RuntimeEnvironment;
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class Network;
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/**
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* Subclass of packet that handles the decoding of it
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*/
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class IncomingPacket : public Packet
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{
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public:
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IncomingPacket() :
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Packet(),
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_receiveTime(0),
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_path(),
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_authenticated(false)
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{
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}
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/**
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* Create a new packet-in-decode
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*
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* @param data Packet data
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* @param len Packet length
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* @param path Path over which packet arrived
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* @param now Current time
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* @throws std::out_of_range Range error processing packet
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*/
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IncomingPacket(const void *data,unsigned int len,const SharedPtr<Path> &path,int64_t now) :
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Packet(data,len),
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_receiveTime(now),
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_path(path),
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_authenticated(false)
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{
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}
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/**
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* Init packet-in-decode in place
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*
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* @param data Packet data
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* @param len Packet length
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* @param path Path over which packet arrived
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* @param now Current time
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* @throws std::out_of_range Range error processing packet
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*/
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inline void init(const void *data,unsigned int len,const SharedPtr<Path> &path,int64_t now)
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{
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copyFrom(data,len);
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_receiveTime = now;
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_path = path;
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_authenticated = false;
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}
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/**
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* Attempt to decode this packet
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*
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* Note that this returns 'true' if processing is complete. This says nothing
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* about whether the packet was valid. A rejection is 'complete.'
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*
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* Once true is returned, this must not be called again. The packet's state
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* may no longer be valid.
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*
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* @param RR Runtime environment
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* @param tPtr Thread pointer to be handed through to any callbacks called as a result of this call
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* @return True if decoding and processing is complete, false if caller should try again
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*/
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bool tryDecode(const RuntimeEnvironment *RR,void *tPtr,int32_t flowId);
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/**
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* @return Time of packet receipt / start of decode
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*/
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inline uint64_t receiveTime() const { return _receiveTime; }
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private:
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// These are called internally to handle packet contents once it has
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// been authenticated, decrypted, decompressed, and classified.
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bool _doERROR(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doHELLO(const RuntimeEnvironment *RR,void *tPtr,const bool alreadyAuthenticated);
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bool _doACK(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doQOS_MEASUREMENT(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doOK(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doWHOIS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doRENDEZVOUS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doFRAME(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer,int32_t flowId);
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bool _doEXT_FRAME(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer,int32_t flowId);
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bool _doECHO(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doMULTICAST_LIKE(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doNETWORK_CREDENTIALS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doNETWORK_CONFIG_REQUEST(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doNETWORK_CONFIG(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doMULTICAST_GATHER(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doMULTICAST_FRAME(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doPUSH_DIRECT_PATHS(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doUSER_MESSAGE(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doREMOTE_TRACE(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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bool _doPATH_NEGOTIATION_REQUEST(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer);
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void _sendErrorNeedCredentials(const RuntimeEnvironment *RR,void *tPtr,const SharedPtr<Peer> &peer,const uint64_t nwid);
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uint64_t _receiveTime;
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SharedPtr<Path> _path;
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bool _authenticated;
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};
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} // namespace ZeroTier
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#endif
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