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222 lines
8.9 KiB
C++
222 lines
8.9 KiB
C++
#ifndef DESTINATION_H__
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#define DESTINATION_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 <set>
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#include <string>
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#include <functional>
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#ifdef I2LUA
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#include <future>
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#endif
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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.h"
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#include "Streaming.h"
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#include "Datagram.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 successfull publish
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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_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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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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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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};
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public:
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LeaseSetDestination (bool isPublic, const std::map<std::string, std::string> * params = nullptr);
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~LeaseSetDestination ();
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virtual bool Start ();
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virtual bool Stop ();
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bool IsRunning () const { return m_IsRunning; };
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boost::asio::io_service& GetService () { return m_Service; };
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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<const 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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void CancelDestinationRequest (const i2p::data::IdentHash& 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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void HandleI2NPMessage (const uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from);
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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 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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protected:
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void SetLeaseSet (i2p::data::LocalLeaseSet * newLeaseSet);
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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 (std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> > tunnels) = 0;
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private:
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void Run ();
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void UpdateLeaseSet ();
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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 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 (std::shared_ptr<I2NPMessage> msg);
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void RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete);
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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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private:
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volatile bool m_IsRunning;
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std::thread * m_Thread;
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boost::asio::io_service m_Service;
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boost::asio::io_service::work m_Work;
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mutable std::mutex m_RemoteLeaseSetsMutex;
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std::map<i2p::data::IdentHash, std::shared_ptr<i2p::data::LeaseSet> > m_RemoteLeaseSets;
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std::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<i2p::data::LocalLeaseSet> m_LeaseSet;
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bool m_IsPublic;
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uint32_t m_PublishReplyToken;
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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, m_CleanupTimer;
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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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};
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class ClientDestination: public LeaseSetDestination
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{
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public:
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#ifdef I2LUA
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// type for informing that a client destination is ready
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typedef std::promise<std::shared_ptr<ClientDestination> > ReadyPromise;
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// informs promise with shared_from_this() when this destination is ready to use
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// if cancelled before ready, informs promise with nullptr
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void Ready(ReadyPromise & p);
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#endif
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ClientDestination (const i2p::data::PrivateKeys& keys, bool isPublic, const std::map<std::string, std::string> * params = nullptr);
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~ClientDestination ();
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bool Start ();
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bool 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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// streaming
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std::shared_ptr<i2p::stream::StreamingDestination> CreateStreamingDestination (int port, bool gzip = true); // additional
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std::shared_ptr<i2p::stream::StreamingDestination> GetStreamingDestination (int port = 0) const;
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// following methods operate with default streaming destination
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void CreateStream (StreamRequestComplete streamRequestComplete, const i2p::data::IdentHash& dest, int port = 0);
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std::shared_ptr<i2p::stream::Stream> CreateStream (std::shared_ptr<const i2p::data::LeaseSet> remote, int port = 0);
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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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// datagram
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i2p::datagram::DatagramDestination * GetDatagramDestination () const { return m_DatagramDestination; };
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i2p::datagram::DatagramDestination * CreateDatagramDestination ();
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// implements LocalDestination
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const uint8_t * GetEncryptionPrivateKey () const { return m_EncryptionPrivateKey; };
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std::shared_ptr<const i2p::data::IdentityEx> GetIdentity () const { return m_Keys.GetPublic (); };
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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 (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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void PersistTemporaryKeys ();
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#ifdef I2LUA
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void ScheduleCheckForReady(ReadyPromise * p);
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void HandleCheckForReady(const boost::system::error_code & ecode, ReadyPromise * p);
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#endif
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private:
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i2p::data::PrivateKeys m_Keys;
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uint8_t m_EncryptionPublicKey[256], m_EncryptionPrivateKey[256];
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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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i2p::datagram::DatagramDestination * m_DatagramDestination;
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boost::asio::deadline_timer m_ReadyChecker;
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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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};
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}
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}
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#endif
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