mirror of https://github.com/PurpleI2P/i2pd.git
orignal
4 years ago
committed by
GitHub
42 changed files with 536 additions and 2093 deletions
@ -1,242 +0,0 @@ |
|||||||
/*
|
|
||||||
* Copyright (c) 2013-2020, The PurpleI2P Project |
|
||||||
* |
|
||||||
* This file is part of Purple i2pd project and licensed under BSD3 |
|
||||||
* |
|
||||||
* See full license text in LICENSE file at top of project tree |
|
||||||
*/ |
|
||||||
|
|
||||||
#ifndef NTCP_SESSION_H__ |
|
||||||
#define NTCP_SESSION_H__ |
|
||||||
|
|
||||||
#include <inttypes.h> |
|
||||||
#include <map> |
|
||||||
#include <memory> |
|
||||||
#include <thread> |
|
||||||
#include <mutex> |
|
||||||
#include <boost/asio.hpp> |
|
||||||
#include "Crypto.h" |
|
||||||
#include "Identity.h" |
|
||||||
#include "RouterInfo.h" |
|
||||||
#include "I2NPProtocol.h" |
|
||||||
#include "TransportSession.h" |
|
||||||
#include "CryptoWorker.h" |
|
||||||
|
|
||||||
namespace i2p |
|
||||||
{ |
|
||||||
namespace transport |
|
||||||
{ |
|
||||||
struct NTCPPhase1 |
|
||||||
{ |
|
||||||
uint8_t pubKey[256]; |
|
||||||
uint8_t HXxorHI[32]; |
|
||||||
}; |
|
||||||
|
|
||||||
struct NTCPPhase2 |
|
||||||
{ |
|
||||||
uint8_t pubKey[256]; |
|
||||||
struct |
|
||||||
{ |
|
||||||
uint8_t hxy[32]; |
|
||||||
uint8_t timestamp[4]; |
|
||||||
uint8_t filler[12]; |
|
||||||
} encrypted; |
|
||||||
}; |
|
||||||
|
|
||||||
struct NTCPWork; |
|
||||||
|
|
||||||
const size_t NTCP_MAX_MESSAGE_SIZE = 16384; |
|
||||||
const size_t NTCP_BUFFER_SIZE = 1028; // fits 1 tunnel data message
|
|
||||||
const int NTCP_CONNECT_TIMEOUT = 5; // 5 seconds
|
|
||||||
const int NTCP_ESTABLISH_TIMEOUT = 10; // 10 seconds
|
|
||||||
const int NTCP_TERMINATION_TIMEOUT = 120; // 2 minutes
|
|
||||||
const int NTCP_TERMINATION_CHECK_TIMEOUT = 30; // 30 seconds
|
|
||||||
const size_t NTCP_DEFAULT_PHASE3_SIZE = 2/*size*/ + i2p::data::DEFAULT_IDENTITY_SIZE/*387*/ + 4/*ts*/ + 15/*padding*/ + 40/*signature*/; // 448
|
|
||||||
const int NTCP_CLOCK_SKEW = 60; // in seconds
|
|
||||||
const int NTCP_MAX_OUTGOING_QUEUE_SIZE = 200; // how many messages we can queue up
|
|
||||||
|
|
||||||
class NTCPServer; |
|
||||||
class NTCPSession: public TransportSession, public std::enable_shared_from_this<NTCPSession> |
|
||||||
{ |
|
||||||
public: |
|
||||||
|
|
||||||
NTCPSession (NTCPServer& server, std::shared_ptr<const i2p::data::RouterInfo> in_RemoteRouter = nullptr); |
|
||||||
~NTCPSession (); |
|
||||||
void Terminate (); |
|
||||||
void Done (); |
|
||||||
|
|
||||||
boost::asio::ip::tcp::socket& GetSocket () { return m_Socket; }; |
|
||||||
boost::asio::io_service & GetService(); |
|
||||||
bool IsEstablished () const { return m_IsEstablished; }; |
|
||||||
bool IsTerminated () const { return m_IsTerminated; }; |
|
||||||
|
|
||||||
void ClientLogin (); |
|
||||||
void ServerLogin (); |
|
||||||
void SendI2NPMessages (const std::vector<std::shared_ptr<I2NPMessage> >& msgs); |
|
||||||
|
|
||||||
private: |
|
||||||
|
|
||||||
void PostI2NPMessages (std::vector<std::shared_ptr<I2NPMessage> > msgs); |
|
||||||
void Connected (); |
|
||||||
void SendTimeSyncMessage (); |
|
||||||
void SetIsEstablished (bool isEstablished) { m_IsEstablished = isEstablished; } |
|
||||||
|
|
||||||
void CreateAESKey (uint8_t * pubKey); |
|
||||||
|
|
||||||
// client
|
|
||||||
void SendPhase3 (); |
|
||||||
void HandlePhase1Sent (const boost::system::error_code& ecode, std::size_t bytes_transferred); |
|
||||||
void HandlePhase2Received (const boost::system::error_code& ecode, std::size_t bytes_transferred); |
|
||||||
void HandlePhase2 (NTCPWork * work=nullptr); |
|
||||||
void HandlePhase3Sent (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsA); |
|
||||||
void HandlePhase4Received (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsA); |
|
||||||
|
|
||||||
//server
|
|
||||||
void SendPhase2 (NTCPWork * work=nullptr); |
|
||||||
void SendPhase4 (uint32_t tsA, uint32_t tsB); |
|
||||||
void HandlePhase1Received (const boost::system::error_code& ecode, std::size_t bytes_transferred); |
|
||||||
void HandlePhase2Sent (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsB); |
|
||||||
void HandlePhase3Received (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsB); |
|
||||||
void HandlePhase3ExtraReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred, uint32_t tsB, size_t paddingLen); |
|
||||||
void HandlePhase3 (uint32_t tsB, size_t paddingLen); |
|
||||||
void HandlePhase4Sent (const boost::system::error_code& ecode, std::size_t bytes_transferred); |
|
||||||
|
|
||||||
// common
|
|
||||||
void Receive (); |
|
||||||
void HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred); |
|
||||||
bool DecryptNextBlock (const uint8_t * encrypted); |
|
||||||
|
|
||||||
void Send (std::shared_ptr<i2p::I2NPMessage> msg); |
|
||||||
boost::asio::const_buffers_1 CreateMsgBuffer (std::shared_ptr<I2NPMessage> msg); |
|
||||||
void Send (const std::vector<std::shared_ptr<I2NPMessage> >& msgs); |
|
||||||
void HandleSent (const boost::system::error_code& ecode, std::size_t bytes_transferred, std::vector<std::shared_ptr<I2NPMessage> > msgs); |
|
||||||
|
|
||||||
private: |
|
||||||
|
|
||||||
NTCPServer& m_Server; |
|
||||||
boost::asio::ip::tcp::socket m_Socket; |
|
||||||
bool m_IsEstablished, m_IsTerminated; |
|
||||||
|
|
||||||
i2p::crypto::CBCDecryption m_Decryption; |
|
||||||
i2p::crypto::CBCEncryption m_Encryption; |
|
||||||
|
|
||||||
struct Establisher |
|
||||||
{ |
|
||||||
NTCPPhase1 phase1; |
|
||||||
NTCPPhase2 phase2; |
|
||||||
} * m_Establisher; |
|
||||||
|
|
||||||
i2p::crypto::AESAlignedBuffer<NTCP_BUFFER_SIZE + 16> m_ReceiveBuffer; |
|
||||||
i2p::crypto::AESAlignedBuffer<16> m_TimeSyncBuffer; |
|
||||||
int m_ReceiveBufferOffset; |
|
||||||
|
|
||||||
std::shared_ptr<I2NPMessage> m_NextMessage; |
|
||||||
size_t m_NextMessageOffset; |
|
||||||
i2p::I2NPMessagesHandler m_Handler; |
|
||||||
|
|
||||||
bool m_IsSending; |
|
||||||
std::vector<std::shared_ptr<I2NPMessage> > m_SendQueue; |
|
||||||
}; |
|
||||||
|
|
||||||
// TODO: move to NTCP.h/.cpp
|
|
||||||
class NTCPServer |
|
||||||
{ |
|
||||||
public: |
|
||||||
|
|
||||||
typedef i2p::worker::ThreadPool<NTCPSession> Pool; |
|
||||||
|
|
||||||
enum RemoteAddressType |
|
||||||
{ |
|
||||||
eIP4Address, |
|
||||||
eIP6Address, |
|
||||||
eHostname |
|
||||||
}; |
|
||||||
|
|
||||||
enum ProxyType |
|
||||||
{ |
|
||||||
eNoProxy, |
|
||||||
eSocksProxy, |
|
||||||
eHTTPProxy |
|
||||||
}; |
|
||||||
|
|
||||||
|
|
||||||
NTCPServer (int workers=4); |
|
||||||
~NTCPServer (); |
|
||||||
|
|
||||||
void Start (); |
|
||||||
void Stop (); |
|
||||||
|
|
||||||
bool AddNTCPSession (std::shared_ptr<NTCPSession> session); |
|
||||||
void RemoveNTCPSession (std::shared_ptr<NTCPSession> session); |
|
||||||
std::shared_ptr<NTCPSession> FindNTCPSession (const i2p::data::IdentHash& ident); |
|
||||||
void ConnectWithProxy (const std::string& addr, uint16_t port, RemoteAddressType addrtype, std::shared_ptr<NTCPSession> conn); |
|
||||||
void Connect(const boost::asio::ip::address & address, uint16_t port, std::shared_ptr<NTCPSession> conn); |
|
||||||
|
|
||||||
bool IsBoundV4() const { return m_NTCPAcceptor != nullptr; }; |
|
||||||
bool IsBoundV6() const { return m_NTCPV6Acceptor != nullptr; }; |
|
||||||
bool NetworkIsReady() const { return IsBoundV4() || IsBoundV6() || UsingProxy(); }; |
|
||||||
bool UsingProxy() const { return m_ProxyType != eNoProxy; }; |
|
||||||
|
|
||||||
void UseProxy(ProxyType proxy, const std::string & address, uint16_t port); |
|
||||||
|
|
||||||
boost::asio::io_service& GetService () { return m_Service; }; |
|
||||||
|
|
||||||
void SetSessionLimits(uint16_t softLimit, uint16_t hardLimit) { m_SoftLimit = softLimit; m_HardLimit = hardLimit; } |
|
||||||
bool ShouldLimit() const { return ShouldHardLimit() || ShouldSoftLimit(); } |
|
||||||
void Work(std::shared_ptr<NTCPSession> conn, Pool::WorkFunc work) |
|
||||||
{ |
|
||||||
m_CryptoPool->Offer({conn, work}); |
|
||||||
} |
|
||||||
private: |
|
||||||
|
|
||||||
/** @brief return true for hard limit */ |
|
||||||
bool ShouldHardLimit() const { return m_HardLimit && m_NTCPSessions.size() >= m_HardLimit; } |
|
||||||
|
|
||||||
/** @brief return true for probabalistic soft backoff */ |
|
||||||
bool ShouldSoftLimit() const |
|
||||||
{ |
|
||||||
auto sessions = m_NTCPSessions.size(); |
|
||||||
return sessions && m_SoftLimit && m_SoftLimit < sessions && ( rand() % sessions ) <= m_SoftLimit; |
|
||||||
} |
|
||||||
void Run (); |
|
||||||
void HandleAccept (std::shared_ptr<NTCPSession> conn, const boost::system::error_code& error); |
|
||||||
void HandleAcceptV6 (std::shared_ptr<NTCPSession> conn, const boost::system::error_code& error); |
|
||||||
|
|
||||||
void HandleConnect (const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer); |
|
||||||
|
|
||||||
void HandleProxyConnect(const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType adddrtype); |
|
||||||
void AfterSocksHandshake(std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType adddrtype); |
|
||||||
|
|
||||||
// timer
|
|
||||||
void ScheduleTermination (); |
|
||||||
void HandleTerminationTimer (const boost::system::error_code& ecode); |
|
||||||
|
|
||||||
private: |
|
||||||
|
|
||||||
bool m_IsRunning; |
|
||||||
std::thread * m_Thread; |
|
||||||
boost::asio::io_service m_Service; |
|
||||||
boost::asio::io_service::work m_Work; |
|
||||||
boost::asio::deadline_timer m_TerminationTimer; |
|
||||||
boost::asio::ip::tcp::acceptor * m_NTCPAcceptor, * m_NTCPV6Acceptor; |
|
||||||
std::map<i2p::data::IdentHash, std::shared_ptr<NTCPSession> > m_NTCPSessions; // access from m_Thread only
|
|
||||||
std::list<std::shared_ptr<NTCPSession> > m_PendingIncomingSessions; |
|
||||||
|
|
||||||
ProxyType m_ProxyType; |
|
||||||
std::string m_ProxyAddress; |
|
||||||
uint16_t m_ProxyPort; |
|
||||||
boost::asio::ip::tcp::resolver m_Resolver; |
|
||||||
boost::asio::ip::tcp::endpoint * m_ProxyEndpoint; |
|
||||||
|
|
||||||
std::shared_ptr<Pool> m_CryptoPool; |
|
||||||
|
|
||||||
uint16_t m_SoftLimit, m_HardLimit; |
|
||||||
public: |
|
||||||
|
|
||||||
// for HTTP/I2PControl
|
|
||||||
const decltype(m_NTCPSessions)& GetNTCPSessions () const { return m_NTCPSessions; }; |
|
||||||
}; |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
#endif |
|
||||||
Loading…
Reference in new issue