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131 lines
3.6 KiB
C++
131 lines
3.6 KiB
C++
/*
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* Copyright (c) 2013-2022, 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 TRANSPORT_SESSION_H__
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#define TRANSPORT_SESSION_H__
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#include <inttypes.h>
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#include <iostream>
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#include <memory>
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#include <vector>
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#include <mutex>
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#include "Identity.h"
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#include "Crypto.h"
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#include "RouterInfo.h"
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#include "I2NPProtocol.h"
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#include "Timestamp.h"
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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 size_t IPV4_HEADER_SIZE = 20;
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const size_t IPV6_HEADER_SIZE = 40;
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const size_t UDP_HEADER_SIZE = 8;
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class SignedData
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{
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public:
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SignedData () {}
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SignedData (const SignedData& other)
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{
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m_Stream << other.m_Stream.rdbuf ();
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}
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void Reset ()
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{
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m_Stream.str("");
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}
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void Insert (const uint8_t * buf, size_t len)
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{
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m_Stream.write ((char *)buf, len);
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}
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template<typename T>
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void Insert (T t)
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{
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m_Stream.write ((char *)&t, sizeof (T));
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}
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bool Verify (std::shared_ptr<const i2p::data::IdentityEx> ident, const uint8_t * signature) const
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{
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return ident->Verify ((const uint8_t *)m_Stream.str ().c_str (), m_Stream.str ().size (), signature);
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}
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void Sign (const i2p::data::PrivateKeys& keys, uint8_t * signature) const
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{
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keys.Sign ((const uint8_t *)m_Stream.str ().c_str (), m_Stream.str ().size (), signature);
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}
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private:
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std::stringstream m_Stream;
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};
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class TransportSession
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{
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public:
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TransportSession (std::shared_ptr<const i2p::data::RouterInfo> router, int terminationTimeout):
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m_NumSentBytes (0), m_NumReceivedBytes (0), m_IsOutgoing (router), m_TerminationTimeout (terminationTimeout),
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m_LastActivityTimestamp (i2p::util::GetSecondsSinceEpoch ())
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{
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if (router)
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m_RemoteIdentity = router->GetRouterIdentity ();
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m_CreationTime = m_LastActivityTimestamp;
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}
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virtual ~TransportSession () {};
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virtual void Done () = 0;
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std::string GetIdentHashBase64() const { return m_RemoteIdentity ? m_RemoteIdentity->GetIdentHash().ToBase64() : ""; }
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std::shared_ptr<const i2p::data::IdentityEx> GetRemoteIdentity ()
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{
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std::lock_guard<std::mutex> l(m_RemoteIdentityMutex);
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return m_RemoteIdentity;
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}
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void SetRemoteIdentity (std::shared_ptr<const i2p::data::IdentityEx> ident)
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{
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std::lock_guard<std::mutex> l(m_RemoteIdentityMutex);
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m_RemoteIdentity = ident;
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}
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size_t GetNumSentBytes () const { return m_NumSentBytes; };
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size_t GetNumReceivedBytes () const { return m_NumReceivedBytes; };
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bool IsOutgoing () const { return m_IsOutgoing; };
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int GetTerminationTimeout () const { return m_TerminationTimeout; };
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void SetTerminationTimeout (int terminationTimeout) { m_TerminationTimeout = terminationTimeout; };
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bool IsTerminationTimeoutExpired (uint64_t ts) const
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{ return ts >= m_LastActivityTimestamp + GetTerminationTimeout (); };
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uint32_t GetCreationTime () const { return m_CreationTime; };
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void SetCreationTime (uint32_t ts) { m_CreationTime = ts; }; // for introducers
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virtual uint32_t GetRelayTag () const { return 0; };
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virtual void SendLocalRouterInfo (bool update = false) { SendI2NPMessages ({ CreateDatabaseStoreMsg () }); };
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virtual void SendI2NPMessages (const std::vector<std::shared_ptr<I2NPMessage> >& msgs) = 0;
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protected:
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std::shared_ptr<const i2p::data::IdentityEx> m_RemoteIdentity;
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mutable std::mutex m_RemoteIdentityMutex;
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size_t m_NumSentBytes, m_NumReceivedBytes;
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bool m_IsOutgoing;
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int m_TerminationTimeout;
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uint64_t m_LastActivityTimestamp;
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uint32_t m_CreationTime; // seconds since epoch
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};
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}
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}
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#endif
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