mirror of
https://github.com/zerotier/ZeroTierOne.git
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114 lines
4 KiB
C++
114 lines
4 KiB
C++
/*
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* Copyright (c)2013-2021 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_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 "Mutex.hpp"
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#include "FCV.hpp"
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#include "Containers.hpp"
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#include "CallContext.hpp"
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#define ZT_VL1_MAX_WHOIS_WAITING_PACKETS 32
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#define ZT_VL1_AUTH_RESULT_FLAG_AUTHENTICATED 0x01U
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#define ZT_VL1_AUTH_RESULT_FLAG_ENCRYPTED 0x02U
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#define ZT_VL1_AUTH_RESULT_FLAG_FORWARD_SECRET 0x04U
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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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/**
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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 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(CallContext &cc, int64_t localSocket, const InetAddress &fromAddr, SharedPtr< Buf > &data, unsigned int len) noexcept;
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private:
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const RuntimeEnvironment *RR;
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void m_relay(CallContext &cc, const SharedPtr< Path > &path, Address destination, SharedPtr< Buf > &pkt, int pktSize);
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void m_sendPendingWhois(CallContext &cc);
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SharedPtr< Peer > m_HELLO(CallContext &cc, const SharedPtr< Path > &path, Buf &pkt, int packetSize);
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bool m_ERROR(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize, Protocol::Verb &inReVerb);
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bool m_OK(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize, Protocol::Verb &inReVerb);
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bool m_WHOIS(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize);
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bool m_RENDEZVOUS(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize);
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bool m_ECHO(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize);
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bool m_PUSH_DIRECT_PATHS(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize);
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bool m_USER_MESSAGE(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize);
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bool m_ENCAP(CallContext &cc, uint64_t packetId, unsigned int auth, const SharedPtr< Path > &path, const SharedPtr< Peer > &peer, Buf &pkt, int packetSize);
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// Defragmentation engine for handling inbound packets with more than one fragment.
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Defragmenter< ZT_MAX_PACKET_FRAGMENTS > m_inputPacketAssembler;
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// Queue of outbound WHOIS reqeusts and packets waiting on them.
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struct p_WhoisQueueItem
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{
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ZT_INLINE p_WhoisQueueItem() : lastRetry(0), retries(0), waitingPacketCount(0)
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{}
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int64_t lastRetry;
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unsigned int retries;
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unsigned int waitingPacketCount;
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unsigned int waitingPacketSize[ZT_VL1_MAX_WHOIS_WAITING_PACKETS];
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SharedPtr< Buf > waitingPacket[ZT_VL1_MAX_WHOIS_WAITING_PACKETS];
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};
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Map< Address, p_WhoisQueueItem > m_whoisQueue;
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Mutex m_whoisQueue_l;
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};
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} // namespace ZeroTier
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#endif
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