mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-17 21:26:04 +00:00
289 lines
11 KiB
C++
289 lines
11 KiB
C++
/*
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* Copyright (c) 2013-2021, 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 SAM_H__
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#define SAM_H__
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#include <inttypes.h>
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#include <string>
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#include <map>
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#include <list>
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#include <set>
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#include <thread>
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#include <mutex>
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#include <memory>
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#include <boost/asio.hpp>
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#include "util.h"
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#include "Identity.h"
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#include "LeaseSet.h"
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#include "Streaming.h"
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#include "Destination.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 size_t SAM_SOCKET_BUFFER_SIZE = 8192;
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const int SAM_SOCKET_CONNECTION_MAX_IDLE = 3600; // in seconds
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const int SAM_SESSION_READINESS_CHECK_INTERVAL = 20; // in seconds
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const char SAM_HANDSHAKE[] = "HELLO VERSION";
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const char SAM_HANDSHAKE_REPLY[] = "HELLO REPLY RESULT=OK VERSION=%s\n";
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const char SAM_HANDSHAKE_NOVERSION[] = "HELLO REPLY RESULT=NOVERSION\n";
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const char SAM_HANDSHAKE_I2P_ERROR[] = "HELLO REPLY RESULT=I2P_ERROR\n";
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const char SAM_SESSION_CREATE[] = "SESSION CREATE";
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const char SAM_SESSION_CREATE_REPLY_OK[] = "SESSION STATUS RESULT=OK DESTINATION=%s\n";
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const char SAM_SESSION_CREATE_DUPLICATED_ID[] = "SESSION STATUS RESULT=DUPLICATED_ID\n";
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const char SAM_SESSION_CREATE_DUPLICATED_DEST[] = "SESSION STATUS RESULT=DUPLICATED_DEST\n";
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const char SAM_SESSION_CREATE_INVALID_ID[] = "SESSION STATUS RESULT=INVALID_ID\n";
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const char SAM_SESSION_STATUS_INVALID_KEY[] = "SESSION STATUS RESULT=INVALID_KEY\n";
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const char SAM_SESSION_STATUS_I2P_ERROR[] = "SESSION STATUS RESULT=I2P_ERROR MESSAGE=%s\n";
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const char SAM_SESSION_ADD[] = "SESSION ADD";
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const char SAM_SESSION_REMOVE[] = "SESSION REMOVE";
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const char SAM_STREAM_CONNECT[] = "STREAM CONNECT";
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const char SAM_STREAM_STATUS_OK[] = "STREAM STATUS RESULT=OK\n";
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const char SAM_STREAM_STATUS_INVALID_ID[] = "STREAM STATUS RESULT=INVALID_ID\n";
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const char SAM_STREAM_STATUS_INVALID_KEY[] = "STREAM STATUS RESULT=INVALID_KEY\n";
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const char SAM_STREAM_STATUS_CANT_REACH_PEER[] = "STREAM STATUS RESULT=CANT_REACH_PEER\n";
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const char SAM_STREAM_STATUS_I2P_ERROR[] = "STREAM STATUS RESULT=I2P_ERROR\n";
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const char SAM_STREAM_ACCEPT[] = "STREAM ACCEPT";
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const char SAM_STREAM_FORWARD[] = "STREAM FORWARD";
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const char SAM_DATAGRAM_SEND[] = "DATAGRAM SEND";
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const char SAM_RAW_SEND[] = "RAW SEND";
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const char SAM_DEST_GENERATE[] = "DEST GENERATE";
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const char SAM_DEST_REPLY[] = "DEST REPLY PUB=%s PRIV=%s\n";
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const char SAM_DEST_REPLY_I2P_ERROR[] = "DEST REPLY RESULT=I2P_ERROR\n";
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const char SAM_NAMING_LOOKUP[] = "NAMING LOOKUP";
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const char SAM_NAMING_REPLY[] = "NAMING REPLY RESULT=OK NAME=%s VALUE=%s\n";
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const char SAM_DATAGRAM_RECEIVED[] = "DATAGRAM RECEIVED DESTINATION=%s SIZE=%lu\n";
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const char SAM_RAW_RECEIVED[] = "RAW RECEIVED SIZE=%lu\n";
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const char SAM_NAMING_REPLY_INVALID_KEY[] = "NAMING REPLY RESULT=INVALID_KEY NAME=%s\n";
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const char SAM_NAMING_REPLY_KEY_NOT_FOUND[] = "NAMING REPLY RESULT=KEY_NOT_FOUND NAME=%s\n";
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const char SAM_PARAM_MIN[] = "MIN";
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const char SAM_PARAM_MAX[] = "MAX";
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const char SAM_PARAM_STYLE[] = "STYLE";
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const char SAM_PARAM_ID[] = "ID";
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const char SAM_PARAM_SILENT[] = "SILENT";
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const char SAM_PARAM_DESTINATION[] = "DESTINATION";
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const char SAM_PARAM_NAME[] = "NAME";
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const char SAM_PARAM_SIGNATURE_TYPE[] = "SIGNATURE_TYPE";
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const char SAM_PARAM_CRYPTO_TYPE[] = "CRYPTO_TYPE";
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const char SAM_PARAM_SIZE[] = "SIZE";
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const char SAM_PARAM_HOST[] = "HOST";
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const char SAM_PARAM_PORT[] = "PORT";
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const char SAM_PARAM_FROM_PORT[] = "FROM_PORT";
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const char SAM_VALUE_TRANSIENT[] = "TRANSIENT";
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const char SAM_VALUE_STREAM[] = "STREAM";
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const char SAM_VALUE_DATAGRAM[] = "DATAGRAM";
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const char SAM_VALUE_RAW[] = "RAW";
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const char SAM_VALUE_MASTER[] = "MASTER";
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const char SAM_VALUE_TRUE[] = "true";
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const char SAM_VALUE_FALSE[] = "false";
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enum SAMSocketType
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{
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eSAMSocketTypeUnknown,
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eSAMSocketTypeSession,
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eSAMSocketTypeStream,
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eSAMSocketTypeAcceptor,
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eSAMSocketTypeForward,
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eSAMSocketTypeTerminated
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};
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class SAMBridge;
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struct SAMSession;
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class SAMSocket: public std::enable_shared_from_this<SAMSocket>
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{
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public:
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typedef boost::asio::ip::tcp::socket Socket_t;
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SAMSocket (SAMBridge& owner);
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~SAMSocket ();
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Socket_t& GetSocket () { return m_Socket; };
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void ReceiveHandshake ();
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void SetSocketType (SAMSocketType socketType) { m_SocketType = socketType; };
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SAMSocketType GetSocketType () const { return m_SocketType; };
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void Terminate (const char* reason);
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bool IsSession(const std::string & id) const;
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private:
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void TerminateClose() { Terminate(nullptr); }
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void HandleHandshakeReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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void HandleHandshakeReplySent (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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void HandleMessage (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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void SendMessageReply (const char * msg, size_t len, bool close);
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void HandleMessageReplySent (const boost::system::error_code& ecode, std::size_t bytes_transferred, bool close);
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void Receive ();
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void HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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void I2PReceive ();
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void HandleI2PReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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void HandleI2PAccept (std::shared_ptr<i2p::stream::Stream> stream);
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void HandleI2PForward (std::shared_ptr<i2p::stream::Stream> stream, boost::asio::ip::tcp::endpoint ep);
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void HandleWriteI2PData (const boost::system::error_code& ecode, size_t sz);
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void HandleI2PDatagramReceive (const i2p::data::IdentityEx& from, uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len);
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void HandleI2PRawDatagramReceive (uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len);
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void ProcessSessionCreate (char * buf, size_t len);
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void ProcessStreamConnect (char * buf, size_t len, size_t rem);
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void ProcessStreamAccept (char * buf, size_t len);
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void ProcessStreamForward (char * buf, size_t len);
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void ProcessDestGenerate (char * buf, size_t len);
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void ProcessNamingLookup (char * buf, size_t len);
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void ProcessSessionAdd (char * buf, size_t len);
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void ProcessSessionRemove (char * buf, size_t len);
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void SendI2PError(const std::string & msg);
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size_t ProcessDatagramSend (char * buf, size_t len, const char * data); // from SAM 1.0
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void ExtractParams (char * buf, std::map<std::string, std::string>& params);
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void Connect (std::shared_ptr<const i2p::data::LeaseSet> remote, std::shared_ptr<SAMSession> session = nullptr);
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void HandleConnectLeaseSetRequestComplete (std::shared_ptr<i2p::data::LeaseSet> leaseSet);
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void SendNamingLookupReply (const std::string& name, std::shared_ptr<const i2p::data::IdentityEx> identity);
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void HandleNamingLookupLeaseSetRequestComplete (std::shared_ptr<i2p::data::LeaseSet> leaseSet, std::string name);
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void HandleSessionReadinessCheckTimer (const boost::system::error_code& ecode);
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void SendSessionCreateReplyOk ();
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void WriteI2PData(size_t sz);
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void WriteI2PDataImmediate(uint8_t * ptr, size_t sz);
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void HandleWriteI2PDataImmediate(const boost::system::error_code & ec, uint8_t * buff);
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void HandleStreamSend(const boost::system::error_code & ec);
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private:
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SAMBridge& m_Owner;
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Socket_t m_Socket;
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boost::asio::deadline_timer m_Timer;
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char m_Buffer[SAM_SOCKET_BUFFER_SIZE + 1];
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size_t m_BufferOffset;
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uint8_t m_StreamBuffer[SAM_SOCKET_BUFFER_SIZE];
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SAMSocketType m_SocketType;
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std::string m_ID; // nickname
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bool m_IsSilent;
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bool m_IsAccepting; // for eSAMSocketTypeAcceptor only
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std::shared_ptr<i2p::stream::Stream> m_Stream;
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};
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enum SAMSessionType
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{
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eSAMSessionTypeUnknown,
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eSAMSessionTypeStream,
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eSAMSessionTypeDatagram,
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eSAMSessionTypeRaw,
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eSAMSessionTypeMaster
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};
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struct SAMSession
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{
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SAMBridge & m_Bridge;
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std::string Name;
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SAMSessionType Type;
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std::shared_ptr<boost::asio::ip::udp::endpoint> UDPEndpoint; // TODO: move
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SAMSession (SAMBridge & parent, const std::string & name, SAMSessionType type);
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virtual ~SAMSession () {};
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virtual std::shared_ptr<ClientDestination> GetLocalDestination () = 0;
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virtual void StopLocalDestination () = 0;
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virtual void Close () { CloseStreams (); };
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void CloseStreams ();
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};
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struct SAMSingleSession: public SAMSession
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{
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std::shared_ptr<ClientDestination> localDestination;
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SAMSingleSession (SAMBridge & parent, const std::string & name, SAMSessionType type, std::shared_ptr<ClientDestination> dest);
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~SAMSingleSession ();
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std::shared_ptr<ClientDestination> GetLocalDestination () { return localDestination; };
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void StopLocalDestination ();
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};
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struct SAMMasterSession: public SAMSingleSession
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{
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std::set<std::string> subsessions;
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SAMMasterSession (SAMBridge & parent, const std::string & name, std::shared_ptr<ClientDestination> dest):
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SAMSingleSession (parent, name, eSAMSessionTypeMaster, dest) {};
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void Close ();
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};
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struct SAMSubSession: public SAMSession
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{
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std::shared_ptr<SAMMasterSession> masterSession;
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int inPort;
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SAMSubSession (std::shared_ptr<SAMMasterSession> master, const std::string& name, SAMSessionType type, int port);
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// implements SAMSession
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std::shared_ptr<ClientDestination> GetLocalDestination ();
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void StopLocalDestination ();
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};
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class SAMBridge: private i2p::util::RunnableService
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{
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public:
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SAMBridge (const std::string& address, int port, bool singleThread);
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~SAMBridge ();
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void Start ();
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void Stop ();
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boost::asio::io_service& GetService () { return GetIOService (); };
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std::shared_ptr<SAMSession> CreateSession (const std::string& id, SAMSessionType type, const std::string& destination, // empty string means transient
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const std::map<std::string, std::string> * params);
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bool AddSession (std::shared_ptr<SAMSession> session);
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void CloseSession (const std::string& id);
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std::shared_ptr<SAMSession> FindSession (const std::string& id) const;
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std::list<std::shared_ptr<SAMSocket> > ListSockets(const std::string & id) const;
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/** send raw data to remote endpoint from our UDP Socket */
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void SendTo (const std::vector<boost::asio::const_buffer>& bufs, const boost::asio::ip::udp::endpoint& ep);
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void AddSocket(std::shared_ptr<SAMSocket> socket);
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void RemoveSocket(const std::shared_ptr<SAMSocket> & socket);
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bool ResolveSignatureType (const std::string& name, i2p::data::SigningKeyType& type) const;
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private:
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void Accept ();
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void HandleAccept(const boost::system::error_code& ecode, std::shared_ptr<SAMSocket> socket);
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void ReceiveDatagram ();
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void HandleReceivedDatagram (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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private:
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bool m_IsSingleThread;
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boost::asio::ip::tcp::acceptor m_Acceptor;
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boost::asio::ip::udp::endpoint m_DatagramEndpoint, m_SenderEndpoint;
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boost::asio::ip::udp::socket m_DatagramSocket;
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mutable std::mutex m_SessionsMutex;
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std::map<std::string, std::shared_ptr<SAMSession> > m_Sessions;
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mutable std::mutex m_OpenSocketsMutex;
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std::list<std::shared_ptr<SAMSocket> > m_OpenSockets;
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uint8_t m_DatagramReceiveBuffer[i2p::datagram::MAX_DATAGRAM_SIZE+1];
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std::map<std::string, i2p::data::SigningKeyType> m_SignatureTypes;
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public:
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// for HTTP
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const decltype(m_Sessions)& GetSessions () const { return m_Sessions; };
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};
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}
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}
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#endif
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