mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-04 06:00:37 +00:00
186 lines
8.3 KiB
C++
186 lines
8.3 KiB
C++
/*
|
|
* Copyright (c) 2022-2024, 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 SSU2_H__
|
|
#define SSU2_H__
|
|
|
|
#include <unordered_map>
|
|
#include <mutex>
|
|
#include "util.h"
|
|
#include "SSU2Session.h"
|
|
|
|
namespace i2p
|
|
{
|
|
namespace transport
|
|
{
|
|
const int SSU2_TERMINATION_CHECK_TIMEOUT = 25; // in seconds
|
|
const int SSU2_CLEANUP_INTERVAL = 72; // in seconds
|
|
const int SSU2_RESEND_CHECK_TIMEOUT = 400; // in milliseconds
|
|
const int SSU2_RESEND_CHECK_TIMEOUT_VARIANCE = 100; // in milliseconds
|
|
const int SSU2_RESEND_CHECK_MORE_TIMEOUT = 10; // in milliseconds
|
|
const size_t SSU2_MAX_RESEND_PACKETS = 128; // packets to resend at the time
|
|
const size_t SSU2_SOCKET_RECEIVE_BUFFER_SIZE = 0x1FFFF; // 128K
|
|
const size_t SSU2_SOCKET_SEND_BUFFER_SIZE = 0x1FFFF; // 128K
|
|
const size_t SSU2_MAX_NUM_INTRODUCERS = 3;
|
|
const size_t SSU2_MIN_RECEIVED_PACKET_SIZE = 40; // 16 byte short header + 8 byte minimum payload + 16 byte MAC
|
|
const int SSU2_TO_INTRODUCER_SESSION_DURATION = 3600; // 1 hour
|
|
const int SSU2_TO_INTRODUCER_SESSION_EXPIRATION = 4800; // 80 minutes
|
|
const int SSU2_KEEP_ALIVE_INTERVAL = 15; // in seconds
|
|
const int SSU2_KEEP_ALIVE_INTERVAL_VARIANCE = 4; // in seconds
|
|
const int SSU2_PROXY_CONNECT_RETRY_TIMEOUT = 30; // in seconds
|
|
|
|
class SSU2Server: private i2p::util::RunnableServiceWithWork
|
|
{
|
|
struct Packet
|
|
{
|
|
uint8_t buf[SSU2_MAX_PACKET_SIZE];
|
|
size_t len;
|
|
boost::asio::ip::udp::endpoint from;
|
|
};
|
|
|
|
class ReceiveService: public i2p::util::RunnableService
|
|
{
|
|
public:
|
|
|
|
ReceiveService (const std::string& name): RunnableService (name) {};
|
|
boost::asio::io_service& GetService () { return GetIOService (); };
|
|
void Start () { StartIOService (); };
|
|
void Stop () { StopIOService (); };
|
|
};
|
|
|
|
public:
|
|
|
|
SSU2Server ();
|
|
~SSU2Server () {};
|
|
|
|
void Start ();
|
|
void Stop ();
|
|
boost::asio::io_service& GetService () { return GetIOService (); };
|
|
void SetLocalAddress (const boost::asio::ip::address& localAddress);
|
|
bool SetProxy (const std::string& address, uint16_t port);
|
|
bool UsesProxy () const { return m_IsThroughProxy; };
|
|
bool IsSupported (const boost::asio::ip::address& addr) const;
|
|
uint16_t GetPort (bool v4) const;
|
|
bool IsSyncClockFromPeers () const { return m_IsSyncClockFromPeers; };
|
|
void AdjustTimeOffset (int64_t offset, std::shared_ptr<const i2p::data::IdentityEx> from);
|
|
|
|
void AddSession (std::shared_ptr<SSU2Session> session);
|
|
void RemoveSession (uint64_t connID);
|
|
void AddSessionByRouterHash (std::shared_ptr<SSU2Session> session);
|
|
bool AddPendingOutgoingSession (std::shared_ptr<SSU2Session> session);
|
|
void RemovePendingOutgoingSession (const boost::asio::ip::udp::endpoint& ep);
|
|
std::shared_ptr<SSU2Session> FindSession (const i2p::data::IdentHash& ident) const;
|
|
std::shared_ptr<SSU2Session> FindPendingOutgoingSession (const boost::asio::ip::udp::endpoint& ep) const;
|
|
std::shared_ptr<SSU2Session> GetRandomSession (i2p::data::RouterInfo::CompatibleTransports remoteTransports,
|
|
const i2p::data::IdentHash& excluded) const;
|
|
|
|
void AddRelay (uint32_t tag, std::shared_ptr<SSU2Session> relay);
|
|
void RemoveRelay (uint32_t tag);
|
|
std::shared_ptr<SSU2Session> FindRelaySession (uint32_t tag);
|
|
|
|
void Send (const uint8_t * header, size_t headerLen, const uint8_t * payload, size_t payloadLen,
|
|
const boost::asio::ip::udp::endpoint& to);
|
|
void Send (const uint8_t * header, size_t headerLen, const uint8_t * headerX, size_t headerXLen,
|
|
const uint8_t * payload, size_t payloadLen, const boost::asio::ip::udp::endpoint& to);
|
|
|
|
bool CreateSession (std::shared_ptr<const i2p::data::RouterInfo> router,
|
|
std::shared_ptr<const i2p::data::RouterInfo::Address> address, bool peerTest = false);
|
|
bool StartPeerTest (std::shared_ptr<const i2p::data::RouterInfo> router, bool v4);
|
|
|
|
void UpdateOutgoingToken (const boost::asio::ip::udp::endpoint& ep, uint64_t token, uint32_t exp);
|
|
uint64_t FindOutgoingToken (const boost::asio::ip::udp::endpoint& ep);
|
|
uint64_t GetIncomingToken (const boost::asio::ip::udp::endpoint& ep);
|
|
std::pair<uint64_t, uint32_t> NewIncomingToken (const boost::asio::ip::udp::endpoint& ep);
|
|
|
|
void RescheduleIntroducersUpdateTimer ();
|
|
void RescheduleIntroducersUpdateTimerV6 ();
|
|
|
|
i2p::util::MemoryPool<SSU2SentPacket>& GetSentPacketsPool () { return m_SentPacketsPool; };
|
|
i2p::util::MemoryPool<SSU2IncompleteMessage>& GetIncompleteMessagesPool () { return m_IncompleteMessagesPool; };
|
|
i2p::util::MemoryPool<SSU2IncompleteMessage::Fragment>& GetFragmentsPool () { return m_FragmentsPool; };
|
|
|
|
private:
|
|
|
|
boost::asio::ip::udp::socket& OpenSocket (const boost::asio::ip::udp::endpoint& localEndpoint);
|
|
void Receive (boost::asio::ip::udp::socket& socket);
|
|
void HandleReceivedFrom (const boost::system::error_code& ecode, size_t bytes_transferred,
|
|
Packet * packet, boost::asio::ip::udp::socket& socket);
|
|
void HandleReceivedPacket (Packet * packet);
|
|
void HandleReceivedPackets (std::vector<Packet *> packets);
|
|
void ProcessNextPacket (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& senderEndpoint);
|
|
|
|
void ScheduleTermination ();
|
|
void HandleTerminationTimer (const boost::system::error_code& ecode);
|
|
|
|
void ScheduleCleanup ();
|
|
void HandleCleanupTimer (const boost::system::error_code& ecode);
|
|
|
|
void ScheduleResend (bool more);
|
|
void HandleResendTimer (const boost::system::error_code& ecode);
|
|
|
|
void ConnectThroughIntroducer (std::shared_ptr<SSU2Session> session);
|
|
std::list<std::shared_ptr<SSU2Session> > FindIntroducers (int maxNumIntroducers,
|
|
bool v4, const std::set<i2p::data::IdentHash>& excluded) const;
|
|
void UpdateIntroducers (bool v4);
|
|
void ScheduleIntroducersUpdateTimer ();
|
|
void HandleIntroducersUpdateTimer (const boost::system::error_code& ecode, bool v4);
|
|
void ScheduleIntroducersUpdateTimerV6 ();
|
|
|
|
void SendThroughProxy (const uint8_t * header, size_t headerLen, const uint8_t * headerX, size_t headerXLen,
|
|
const uint8_t * payload, size_t payloadLen, const boost::asio::ip::udp::endpoint& to);
|
|
void ProcessNextPacketFromProxy (uint8_t * buf, size_t len);
|
|
void ConnectToProxy ();
|
|
void ReconnectToProxy ();
|
|
void HandshakeWithProxy ();
|
|
void ReadHandshakeWithProxyReply ();
|
|
void SendUDPAssociateRequest ();
|
|
void ReadUDPAssociateReply ();
|
|
void ReadUDPAssociateSocket (); // handle if closed by peer
|
|
|
|
private:
|
|
|
|
ReceiveService m_ReceiveService;
|
|
boost::asio::ip::udp::socket m_SocketV4, m_SocketV6;
|
|
boost::asio::ip::address m_AddressV4, m_AddressV6;
|
|
std::unordered_map<uint64_t, std::shared_ptr<SSU2Session> > m_Sessions;
|
|
std::unordered_map<i2p::data::IdentHash, std::shared_ptr<SSU2Session> > m_SessionsByRouterHash;
|
|
std::map<boost::asio::ip::udp::endpoint, std::shared_ptr<SSU2Session> > m_PendingOutgoingSessions;
|
|
mutable std::mutex m_PendingOutgoingSessionsMutex;
|
|
std::map<boost::asio::ip::udp::endpoint, std::pair<uint64_t, uint32_t> > m_IncomingTokens, m_OutgoingTokens; // remote endpoint -> (token, expires in seconds)
|
|
std::map<uint32_t, std::shared_ptr<SSU2Session> > m_Relays; // we are introducer, relay tag -> session
|
|
std::list<i2p::data::IdentHash> m_Introducers, m_IntroducersV6; // introducers we are connected to
|
|
i2p::util::MemoryPoolMt<Packet> m_PacketsPool;
|
|
i2p::util::MemoryPool<SSU2SentPacket> m_SentPacketsPool;
|
|
i2p::util::MemoryPool<SSU2IncompleteMessage> m_IncompleteMessagesPool;
|
|
i2p::util::MemoryPool<SSU2IncompleteMessage::Fragment> m_FragmentsPool;
|
|
boost::asio::deadline_timer m_TerminationTimer, m_CleanupTimer, m_ResendTimer,
|
|
m_IntroducersUpdateTimer, m_IntroducersUpdateTimerV6;
|
|
std::shared_ptr<SSU2Session> m_LastSession;
|
|
bool m_IsPublished; // if we maintain introducers
|
|
bool m_IsSyncClockFromPeers;
|
|
int64_t m_PendingTimeOffset; // during peer test
|
|
std::shared_ptr<const i2p::data::IdentityEx> m_PendingTimeOffsetFrom;
|
|
|
|
// proxy
|
|
bool m_IsThroughProxy;
|
|
uint8_t m_UDPRequestHeader[SOCKS5_UDP_IPV6_REQUEST_HEADER_SIZE];
|
|
std::unique_ptr<boost::asio::ip::tcp::endpoint> m_ProxyEndpoint;
|
|
std::unique_ptr<boost::asio::ip::tcp::socket> m_UDPAssociateSocket;
|
|
std::unique_ptr<boost::asio::ip::udp::endpoint> m_ProxyRelayEndpoint;
|
|
std::unique_ptr<boost::asio::deadline_timer> m_ProxyConnectRetryTimer;
|
|
|
|
public:
|
|
|
|
// for HTTP/I2PControl
|
|
const decltype(m_Sessions)& GetSSU2Sessions () const { return m_Sessions; };
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|