mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-04 06:00:37 +00:00
331 lines
15 KiB
C++
331 lines
15 KiB
C++
/*
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* Copyright (c) 2013-2023, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#ifndef DESTINATION_H__
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#define DESTINATION_H__
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#include <string.h>
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#include <thread>
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#include <mutex>
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#include <memory>
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#include <map>
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#include <unordered_map>
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#include <set>
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#include <string>
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#include <functional>
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#include <boost/asio.hpp>
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#include "Identity.h"
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#include "TunnelPool.h"
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#include "Crypto.h"
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#include "LeaseSet.h"
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#include "Garlic.h"
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#include "NetDb.hpp"
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#include "Streaming.h"
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#include "Datagram.h"
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#include "util.h"
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namespace i2p
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{
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namespace client
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{
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const uint8_t PROTOCOL_TYPE_STREAMING = 6;
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const uint8_t PROTOCOL_TYPE_DATAGRAM = 17;
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const uint8_t PROTOCOL_TYPE_RAW = 18;
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const int PUBLISH_CONFIRMATION_TIMEOUT = 5; // in seconds
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const int PUBLISH_VERIFICATION_TIMEOUT = 10; // in seconds after successful publish
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const int PUBLISH_MIN_INTERVAL = 20; // in seconds
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const int PUBLISH_REGULAR_VERIFICATION_INTERNAL = 100; // in seconds periodically
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const int LEASESET_REQUEST_TIMEOUT = 5; // in seconds
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const int MAX_LEASESET_REQUEST_TIMEOUT = 40; // in seconds
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const int DESTINATION_CLEANUP_TIMEOUT = 3; // in minutes
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const unsigned int MAX_NUM_FLOODFILLS_PER_REQUEST = 7;
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// I2CP
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const char I2CP_PARAM_INBOUND_TUNNEL_LENGTH[] = "inbound.length";
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const int DEFAULT_INBOUND_TUNNEL_LENGTH = 3;
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const char I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH[] = "outbound.length";
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const int DEFAULT_OUTBOUND_TUNNEL_LENGTH = 3;
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const char I2CP_PARAM_INBOUND_TUNNELS_QUANTITY[] = "inbound.quantity";
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const int DEFAULT_INBOUND_TUNNELS_QUANTITY = 5;
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const char I2CP_PARAM_OUTBOUND_TUNNELS_QUANTITY[] = "outbound.quantity";
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const int DEFAULT_OUTBOUND_TUNNELS_QUANTITY = 5;
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const char I2CP_PARAM_INBOUND_TUNNELS_LENGTH_VARIANCE[] = "inbound.lengthVariance";
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const int DEFAULT_INBOUND_TUNNELS_LENGTH_VARIANCE = 0;
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const char I2CP_PARAM_OUTBOUND_TUNNELS_LENGTH_VARIANCE[] = "outbound.lengthVariance";
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const int DEFAULT_OUTBOUND_TUNNELS_LENGTH_VARIANCE = 0;
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const char I2CP_PARAM_EXPLICIT_PEERS[] = "explicitPeers";
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const int STREAM_REQUEST_TIMEOUT = 60; //in seconds
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const char I2CP_PARAM_TAGS_TO_SEND[] = "crypto.tagsToSend";
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const int DEFAULT_TAGS_TO_SEND = 40;
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const char I2CP_PARAM_RATCHET_INBOUND_TAGS[] = "crypto.ratchet.inboundTags";
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const char I2CP_PARAM_RATCHET_OUTBOUND_TAGS[] = "crypto.ratchet.outboundTags"; // not used yet
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const char I2CP_PARAM_INBOUND_NICKNAME[] = "inbound.nickname";
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const char I2CP_PARAM_OUTBOUND_NICKNAME[] = "outbound.nickname";
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const char I2CP_PARAM_DONT_PUBLISH_LEASESET[] = "i2cp.dontPublishLeaseSet";
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const char I2CP_PARAM_LEASESET_TYPE[] = "i2cp.leaseSetType";
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const int DEFAULT_LEASESET_TYPE = 3;
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const char I2CP_PARAM_LEASESET_ENCRYPTION_TYPE[] = "i2cp.leaseSetEncType";
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const char I2CP_PARAM_LEASESET_PRIV_KEY[] = "i2cp.leaseSetPrivKey"; // PSK decryption key, base64
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const char I2CP_PARAM_LEASESET_AUTH_TYPE[] = "i2cp.leaseSetAuthType";
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const char I2CP_PARAM_LEASESET_CLIENT_DH[] = "i2cp.leaseSetClient.dh"; // group of i2cp.leaseSetClient.dh.nnn
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const char I2CP_PARAM_LEASESET_CLIENT_PSK[] = "i2cp.leaseSetClient.psk"; // group of i2cp.leaseSetClient.psk.nnn
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// latency
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const char I2CP_PARAM_MIN_TUNNEL_LATENCY[] = "latency.min";
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const int DEFAULT_MIN_TUNNEL_LATENCY = 0;
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const char I2CP_PARAM_MAX_TUNNEL_LATENCY[] = "latency.max";
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const int DEFAULT_MAX_TUNNEL_LATENCY = 0;
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// streaming
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const char I2CP_PARAM_STREAMING_INITIAL_ACK_DELAY[] = "i2p.streaming.initialAckDelay";
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const int DEFAULT_INITIAL_ACK_DELAY = 200; // milliseconds
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const char I2CP_PARAM_STREAMING_ANSWER_PINGS[] = "i2p.streaming.answerPings";
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const int DEFAULT_ANSWER_PINGS = true;
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typedef std::function<void (std::shared_ptr<i2p::stream::Stream> stream)> StreamRequestComplete;
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class LeaseSetDestination: public i2p::garlic::GarlicDestination,
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public std::enable_shared_from_this<LeaseSetDestination>
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{
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typedef std::function<void (std::shared_ptr<i2p::data::LeaseSet> leaseSet)> RequestComplete;
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// leaseSet = nullptr means not found
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struct LeaseSetRequest
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{
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LeaseSetRequest (boost::asio::io_service& service): requestTime (0), requestTimeoutTimer (service) {};
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std::set<i2p::data::IdentHash> excluded;
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uint64_t requestTime;
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boost::asio::deadline_timer requestTimeoutTimer;
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std::list<RequestComplete> requestComplete;
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std::shared_ptr<i2p::tunnel::OutboundTunnel> outboundTunnel;
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std::shared_ptr<i2p::tunnel::InboundTunnel> replyTunnel;
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std::shared_ptr<const i2p::data::BlindedPublicKey> requestedBlindedKey; // for encrypted LeaseSet2 only
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void Complete (std::shared_ptr<i2p::data::LeaseSet> ls)
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{
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for (auto& it: requestComplete) it (ls);
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requestComplete.clear ();
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}
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};
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public:
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LeaseSetDestination (boost::asio::io_service& service, bool isPublic, const std::map<std::string, std::string> * params = nullptr);
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~LeaseSetDestination ();
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const std::string& GetNickname () const { return m_Nickname; };
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boost::asio::io_service& GetService () { return m_Service; };
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virtual void Start ();
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virtual void Stop ();
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/** i2cp reconfigure */
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virtual bool Reconfigure(std::map<std::string, std::string> i2cpOpts);
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std::shared_ptr<i2p::tunnel::TunnelPool> GetTunnelPool () { return m_Pool; };
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bool IsReady () const { return m_LeaseSet && !m_LeaseSet->IsExpired () && m_Pool->GetOutboundTunnels ().size () > 0; };
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std::shared_ptr<i2p::data::LeaseSet> FindLeaseSet (const i2p::data::IdentHash& ident);
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bool RequestDestination (const i2p::data::IdentHash& dest, RequestComplete requestComplete = nullptr);
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bool RequestDestinationWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::BlindedPublicKey> dest, RequestComplete requestComplete = nullptr);
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void CancelDestinationRequest (const i2p::data::IdentHash& dest, bool notify = true);
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void CancelDestinationRequestWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::BlindedPublicKey> dest, bool notify = true);
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// implements GarlicDestination
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std::shared_ptr<const i2p::data::LocalLeaseSet> GetLeaseSet ();
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std::shared_ptr<i2p::tunnel::TunnelPool> GetTunnelPool () const { return m_Pool; }
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// override GarlicDestination
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bool SubmitSessionKey (const uint8_t * key, const uint8_t * tag);
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void SubmitECIESx25519Key (const uint8_t * key, uint64_t tag);
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void ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg);
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void ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg);
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void SetLeaseSetUpdated ();
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bool IsPublic () const { return m_IsPublic; };
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void SetPublic (bool pub) { m_IsPublic = pub; };
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protected:
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// implements GarlicDestination
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void HandleI2NPMessage (const uint8_t * buf, size_t len);
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bool HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len, uint32_t msgID);
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void SetLeaseSet (std::shared_ptr<const i2p::data::LocalLeaseSet> newLeaseSet);
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int GetLeaseSetType () const { return m_LeaseSetType; };
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void SetLeaseSetType (int leaseSetType) { m_LeaseSetType = leaseSetType; };
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int GetAuthType () const { return m_AuthType; };
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virtual void CleanupDestination () {}; // additional clean up in derived classes
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// I2CP
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virtual void HandleDataMessage (const uint8_t * buf, size_t len) = 0;
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virtual void CreateNewLeaseSet (const std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> >& tunnels) = 0;
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private:
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void UpdateLeaseSet ();
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std::shared_ptr<const i2p::data::LocalLeaseSet> GetLeaseSetMt ();
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void Publish ();
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void HandlePublishConfirmationTimer (const boost::system::error_code& ecode);
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void HandlePublishVerificationTimer (const boost::system::error_code& ecode);
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void HandlePublishDelayTimer (const boost::system::error_code& ecode);
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void HandleDatabaseStoreMessage (const uint8_t * buf, size_t len);
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void HandleDatabaseSearchReplyMessage (const uint8_t * buf, size_t len);
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void HandleDeliveryStatusMessage (uint32_t msgID);
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void RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete, std::shared_ptr<const i2p::data::BlindedPublicKey> requestedBlindedKey = nullptr);
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bool SendLeaseSetRequest (const i2p::data::IdentHash& dest, std::shared_ptr<const i2p::data::RouterInfo> nextFloodfill, std::shared_ptr<LeaseSetRequest> request);
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void HandleRequestTimoutTimer (const boost::system::error_code& ecode, const i2p::data::IdentHash& dest);
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void HandleCleanupTimer (const boost::system::error_code& ecode);
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void CleanupRemoteLeaseSets ();
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i2p::data::CryptoKeyType GetPreferredCryptoType () const;
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private:
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boost::asio::io_service& m_Service;
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mutable std::mutex m_RemoteLeaseSetsMutex;
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std::unordered_map<i2p::data::IdentHash, std::shared_ptr<i2p::data::LeaseSet> > m_RemoteLeaseSets;
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std::unordered_map<i2p::data::IdentHash, std::shared_ptr<LeaseSetRequest> > m_LeaseSetRequests;
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std::shared_ptr<i2p::tunnel::TunnelPool> m_Pool;
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std::mutex m_LeaseSetMutex;
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std::shared_ptr<const i2p::data::LocalLeaseSet> m_LeaseSet;
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bool m_IsPublic;
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uint32_t m_PublishReplyToken;
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uint64_t m_LastSubmissionTime; // in seconds
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std::set<i2p::data::IdentHash> m_ExcludedFloodfills; // for publishing
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boost::asio::deadline_timer m_PublishConfirmationTimer, m_PublishVerificationTimer,
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m_PublishDelayTimer, m_CleanupTimer;
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std::string m_Nickname;
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int m_LeaseSetType, m_AuthType;
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std::unique_ptr<i2p::data::Tag<32> > m_LeaseSetPrivKey; // non-null if presented
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public:
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// for HTTP only
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int GetNumRemoteLeaseSets () const { return m_RemoteLeaseSets.size (); };
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const decltype(m_RemoteLeaseSets)& GetLeaseSets () const { return m_RemoteLeaseSets; };
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bool IsEncryptedLeaseSet () const { return m_LeaseSetType == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2; };
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bool IsPerClientAuth () const { return m_AuthType > 0; };
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};
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class ClientDestination: public LeaseSetDestination
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{
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struct EncryptionKey
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{
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uint8_t pub[256], priv[256];
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i2p::data::CryptoKeyType keyType;
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std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> decryptor;
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EncryptionKey (i2p::data::CryptoKeyType t):keyType(t) { memset (pub, 0, 256); memset (priv, 0, 256); };
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void GenerateKeys () { i2p::data::PrivateKeys::GenerateCryptoKeyPair (keyType, priv, pub); };
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void CreateDecryptor () { decryptor = i2p::data::PrivateKeys::CreateDecryptor (keyType, priv); };
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};
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public:
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ClientDestination (boost::asio::io_service& service, const i2p::data::PrivateKeys& keys,
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bool isPublic, const std::map<std::string, std::string> * params = nullptr);
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~ClientDestination ();
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void Start ();
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void Stop ();
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const i2p::data::PrivateKeys& GetPrivateKeys () const { return m_Keys; };
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void Sign (const uint8_t * buf, int len, uint8_t * signature) const { m_Keys.Sign (buf, len, signature); };
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// ref counter
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int Acquire () { return ++m_RefCounter; };
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int Release () { return --m_RefCounter; };
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int GetRefCounter () const { return m_RefCounter; };
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// streaming
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std::shared_ptr<i2p::stream::StreamingDestination> CreateStreamingDestination (uint16_t port, bool gzip = true); // additional
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std::shared_ptr<i2p::stream::StreamingDestination> GetStreamingDestination (uint16_t port = 0) const;
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std::shared_ptr<i2p::stream::StreamingDestination> RemoveStreamingDestination (uint16_t port);
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// following methods operate with default streaming destination
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void CreateStream (StreamRequestComplete streamRequestComplete, const i2p::data::IdentHash& dest, uint16_t port = 0);
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void CreateStream (StreamRequestComplete streamRequestComplete, std::shared_ptr<const i2p::data::BlindedPublicKey> dest, uint16_t port = 0);
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std::shared_ptr<i2p::stream::Stream> CreateStream (const i2p::data::IdentHash& dest, uint16_t port = 0); // sync
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std::shared_ptr<i2p::stream::Stream> CreateStream (std::shared_ptr<const i2p::data::BlindedPublicKey> dest, uint16_t port = 0); // sync
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std::shared_ptr<i2p::stream::Stream> CreateStream (std::shared_ptr<const i2p::data::LeaseSet> remote, uint16_t port = 0);
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void SendPing (const i2p::data::IdentHash& to);
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void SendPing (std::shared_ptr<const i2p::data::BlindedPublicKey> to);
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void AcceptStreams (const i2p::stream::StreamingDestination::Acceptor& acceptor);
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void StopAcceptingStreams ();
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bool IsAcceptingStreams () const;
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void AcceptOnce (const i2p::stream::StreamingDestination::Acceptor& acceptor);
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int GetStreamingAckDelay () const { return m_StreamingAckDelay; }
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bool IsStreamingAnswerPings () const { return m_IsStreamingAnswerPings; }
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// datagram
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i2p::datagram::DatagramDestination * GetDatagramDestination () const { return m_DatagramDestination; };
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i2p::datagram::DatagramDestination * CreateDatagramDestination (bool gzip = true);
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// implements LocalDestination
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bool Decrypt (const uint8_t * encrypted, uint8_t * data, i2p::data::CryptoKeyType preferredCrypto) const;
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std::shared_ptr<const i2p::data::IdentityEx> GetIdentity () const { return m_Keys.GetPublic (); };
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bool SupportsEncryptionType (i2p::data::CryptoKeyType keyType) const;
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const uint8_t * GetEncryptionPublicKey (i2p::data::CryptoKeyType keyType) const;
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protected:
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void CleanupDestination ();
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// I2CP
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void HandleDataMessage (const uint8_t * buf, size_t len);
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void CreateNewLeaseSet (const std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> >& tunnels);
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private:
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std::shared_ptr<ClientDestination> GetSharedFromThis () {
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return std::static_pointer_cast<ClientDestination>(shared_from_this ());
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}
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void PersistTemporaryKeys (EncryptionKey * keys, bool isSingleKey);
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void ReadAuthKey (const std::string& group, const std::map<std::string, std::string> * params);
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template<typename Dest>
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std::shared_ptr<i2p::stream::Stream> CreateStreamSync (const Dest& dest, uint16_t port);
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private:
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i2p::data::PrivateKeys m_Keys;
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std::unique_ptr<EncryptionKey> m_StandardEncryptionKey;
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std::unique_ptr<EncryptionKey> m_ECIESx25519EncryptionKey;
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int m_StreamingAckDelay;
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bool m_IsStreamingAnswerPings;
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std::shared_ptr<i2p::stream::StreamingDestination> m_StreamingDestination; // default
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std::map<uint16_t, std::shared_ptr<i2p::stream::StreamingDestination> > m_StreamingDestinationsByPorts;
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std::shared_ptr<i2p::stream::StreamingDestination> m_LastStreamingDestination; uint16_t m_LastPort; // for server tunnels
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i2p::datagram::DatagramDestination * m_DatagramDestination;
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int m_RefCounter; // how many clients(tunnels) use this destination
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boost::asio::deadline_timer m_ReadyChecker;
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std::shared_ptr<std::vector<i2p::data::AuthPublicKey> > m_AuthKeys; // we don't need them for I2CP
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public:
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// for HTTP only
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std::vector<std::shared_ptr<const i2p::stream::Stream> > GetAllStreams () const;
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bool DeleteStream (uint32_t recvStreamID);
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};
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class RunnableClientDestination: private i2p::util::RunnableService, public ClientDestination
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{
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public:
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RunnableClientDestination (const i2p::data::PrivateKeys& keys, bool isPublic, const std::map<std::string, std::string> * params = nullptr);
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~RunnableClientDestination ();
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void Start ();
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void Stop ();
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};
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}
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}
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#endif
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