2014-01-23 21:10:33 +00:00
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#ifndef SSU_H__
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#define SSU_H__
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#include <inttypes.h>
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2014-06-17 17:15:32 +00:00
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#include <string.h>
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2014-01-24 21:30:07 +00:00
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#include <map>
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2014-02-09 23:28:34 +00:00
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#include <list>
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2014-04-09 18:58:30 +00:00
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#include <set>
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2014-04-20 00:45:41 +00:00
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#include <thread>
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#include <mutex>
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2014-01-23 21:10:33 +00:00
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#include <boost/asio.hpp>
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2015-11-03 14:15:49 +00:00
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#include "Crypto.h"
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2014-01-27 21:52:17 +00:00
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#include "I2PEndian.h"
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2014-04-04 18:56:46 +00:00
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#include "Identity.h"
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2014-01-28 21:49:54 +00:00
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#include "RouterInfo.h"
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#include "I2NPProtocol.h"
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#include "SSUSession.h"
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2014-01-23 21:10:33 +00:00
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namespace i2p
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{
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namespace transport
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{
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const int SSU_KEEP_ALIVE_INTERVAL = 30; // 30 seconds
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const int SSU_PEER_TEST_TIMEOUT = 60; // 60 seconds
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2014-09-05 20:35:02 +00:00
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const int SSU_TO_INTRODUCER_SESSION_DURATION = 3600; // 1 hour
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2014-09-09 12:03:05 +00:00
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const size_t SSU_MAX_NUM_INTRODUCERS = 3;
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2015-02-09 01:28:18 +00:00
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struct SSUPacket
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{
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i2p::crypto::AESAlignedBuffer<1500> buf;
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boost::asio::ip::udp::endpoint from;
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size_t len;
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};
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2014-01-23 21:10:33 +00:00
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class SSUServer
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{
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public:
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SSUServer (int port);
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~SSUServer ();
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void Start ();
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void Stop ();
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void CreateSession (std::shared_ptr<const i2p::data::RouterInfo> router, bool peerTest = false);
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void CreateSession (std::shared_ptr<const i2p::data::RouterInfo> router,
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const boost::asio::ip::address& addr, int port, bool peerTest = false);
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std::shared_ptr<SSUSession> FindSession (std::shared_ptr<const i2p::data::RouterInfo> router) const;
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std::shared_ptr<SSUSession> FindSession (const boost::asio::ip::udp::endpoint& e) const;
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std::shared_ptr<SSUSession> GetRandomEstablishedV4Session (std::shared_ptr<const SSUSession> excluded);
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void DeleteSession (std::shared_ptr<SSUSession> session);
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2014-02-21 21:13:36 +00:00
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void DeleteAllSessions ();
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2015-01-12 02:00:38 +00:00
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boost::asio::io_service& GetService () { return m_Service; };
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boost::asio::io_service& GetServiceV6 () { return m_ServiceV6; };
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const boost::asio::ip::udp::endpoint& GetEndpoint () const { return m_Endpoint; };
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void Send (const uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& to);
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void AddRelay (uint32_t tag, const boost::asio::ip::udp::endpoint& relay);
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std::shared_ptr<SSUSession> FindRelaySession (uint32_t tag);
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void NewPeerTest (uint32_t nonce, PeerTestParticipant role, std::shared_ptr<SSUSession> session = nullptr);
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PeerTestParticipant GetPeerTestParticipant (uint32_t nonce);
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std::shared_ptr<SSUSession> GetPeerTestSession (uint32_t nonce);
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void UpdatePeerTest (uint32_t nonce, PeerTestParticipant role);
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void RemovePeerTest (uint32_t nonce);
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2014-01-23 21:10:33 +00:00
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private:
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void Run ();
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2014-11-30 22:19:21 +00:00
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void RunV6 ();
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void RunReceivers ();
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void Receive ();
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void ReceiveV6 ();
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void HandleReceivedFrom (const boost::system::error_code& ecode, std::size_t bytes_transferred, SSUPacket * packet);
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void HandleReceivedFromV6 (const boost::system::error_code& ecode, std::size_t bytes_transferred, SSUPacket * packet);
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void HandleReceivedPackets (std::vector<SSUPacket *> packets,
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std::map<boost::asio::ip::udp::endpoint, std::shared_ptr<SSUSession> >* sessions);
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2014-01-23 21:10:33 +00:00
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2015-11-29 14:10:49 +00:00
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void CreateSessionThroughIntroducer (std::shared_ptr<const i2p::data::RouterInfo> router, bool peerTest = false);
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void CreateDirectSession (std::shared_ptr<const i2p::data::RouterInfo> router, boost::asio::ip::udp::endpoint remoteEndpoint, bool peerTest);
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2014-09-03 20:49:48 +00:00
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template<typename Filter>
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std::shared_ptr<SSUSession> GetRandomV4Session (Filter filter);
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std::set<SSUSession *> FindIntroducers (int maxNumIntroducers);
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void ScheduleIntroducersUpdateTimer ();
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void HandleIntroducersUpdateTimer (const boost::system::error_code& ecode);
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2015-02-26 19:54:28 +00:00
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void SchedulePeerTestsCleanupTimer ();
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void HandlePeerTestsCleanupTimer (const boost::system::error_code& ecode);
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2014-01-23 21:10:33 +00:00
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private:
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2015-02-26 02:56:51 +00:00
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struct PeerTest
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{
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uint64_t creationTime;
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PeerTestParticipant role;
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std::shared_ptr<SSUSession> session; // for Bob to Alice
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};
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bool m_IsRunning;
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std::thread * m_Thread, * m_ThreadV6, * m_ReceiversThread;
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boost::asio::io_service m_Service, m_ServiceV6, m_ReceiversService;
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boost::asio::io_service::work m_Work, m_WorkV6, m_ReceiversWork;
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boost::asio::ip::udp::endpoint m_Endpoint, m_EndpointV6;
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boost::asio::ip::udp::socket m_Socket, m_SocketV6;
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boost::asio::deadline_timer m_IntroducersUpdateTimer, m_PeerTestsCleanupTimer;
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2014-09-07 00:43:20 +00:00
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std::list<boost::asio::ip::udp::endpoint> m_Introducers; // introducers we are connected to
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std::map<boost::asio::ip::udp::endpoint, std::shared_ptr<SSUSession> > m_Sessions, m_SessionsV6;
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std::map<uint32_t, boost::asio::ip::udp::endpoint> m_Relays; // we are introducer
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std::map<uint32_t, PeerTest> m_PeerTests; // nonce -> creation time in milliseconds
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2014-02-25 03:28:28 +00:00
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public:
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// for HTTP only
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const decltype(m_Sessions)& GetSessions () const { return m_Sessions; };
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const decltype(m_SessionsV6)& GetSessionsV6 () const { return m_SessionsV6; };
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2014-01-23 21:10:33 +00:00
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};
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}
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}
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#endif
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