mirror of
https://github.com/zerotier/ZeroTierOne.git
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98 lines
3.4 KiB
C++
98 lines
3.4 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: 2024-01-01
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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_VL1_HPP
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#define ZT_VL1_HPP
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#include "Constants.hpp"
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#include "Defragmenter.hpp"
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#include "Buf.hpp"
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#include "Address.hpp"
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#include "Protocol.hpp"
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#include "Hashtable.hpp"
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#include "Mutex.hpp"
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#include "FCV.hpp"
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#include <vector>
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namespace ZeroTier {
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class RuntimeEnvironment;
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class Peer;
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class VL2;
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/**
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* VL1 (virtual layer 1) packet I/O and messaging.
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*
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* This class is thread safe.
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*/
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class VL1
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{
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public:
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explicit VL1(const RuntimeEnvironment *renv);
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~VL1();
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/**
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* Called when a packet is received from the real network
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*
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* The packet data supplied to this method may be modified. Internal
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* packet handler code may also take possession of it via atomic swap
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* and leave the 'data' pointer NULL. The 'data' pointer and its
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* contents should not be used after this call. Make a copy if the
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* data might still be needed.
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*
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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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* @param localSocket Local I/O socket as supplied by external code
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* @param fromAddr Internet IP address of origin
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* @param data Packet data
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* @param len Packet length
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*/
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void onRemotePacket(void *tPtr,int64_t localSocket,const InetAddress &fromAddr,SharedPtr<Buf> &data,unsigned int len);
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private:
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const RuntimeEnvironment *RR;
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// Code to handle relaying of packets to other nodes.
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void _relay(void *tPtr,const SharedPtr<Path> &path,const Address &destination,SharedPtr<Buf> &data,unsigned int len);
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// Send any pending WHOIS requests.
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void _sendPendingWhois(void *tPtr,int64_t now);
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// Handlers for VL1 verbs -- for clarity's sake VL2 verbs are in the VL2 class.
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bool _HELLO(void *tPtr,const SharedPtr<Path> &path,SharedPtr<Peer> &peer,Buf &pkt,int packetSize,bool authenticated);
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bool _ERROR(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize,Protocol::Verb &inReVerb);
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bool _OK(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize,Protocol::Verb &inReVerb);
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bool _WHOIS(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize);
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bool _RENDEZVOUS(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize);
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bool _ECHO(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize);
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bool _PUSH_DIRECT_PATHS(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize);
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bool _USER_MESSAGE(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize);
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bool _ENCAP(void *tPtr,const SharedPtr<Path> &path,const SharedPtr<Peer> &peer,Buf &pkt,int packetSize);
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struct _WhoisQueueItem
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{
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ZT_INLINE _WhoisQueueItem() : lastRetry(0),inboundPackets(),retries(0) {}
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int64_t lastRetry;
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FCV<Buf::Slice,32> inboundPackets; // capacity can be changed but this should be plenty
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unsigned int retries;
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};
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Defragmenter<ZT_MAX_PACKET_FRAGMENTS> _inputPacketAssembler;
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Hashtable<Address,_WhoisQueueItem> _whoisQueue;
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Mutex _whoisQueue_l;
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};
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} // namespace ZeroTier
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#endif
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