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1607 lines
49 KiB
C++
1607 lines
49 KiB
C++
/*
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* Copyright (c) 2013-2024, 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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#include <string.h>
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#include <stdio.h>
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#ifdef _MSC_VER
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#include <stdlib.h>
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#endif
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#include "Base.h"
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#include "Identity.h"
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#include "Log.h"
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#include "Destination.h"
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#include "ClientContext.h"
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#include "util.h"
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#include "SAM.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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SAMSocket::SAMSocket (SAMBridge& owner):
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m_Owner (owner), m_Socket(owner.GetService()), m_Timer (m_Owner.GetService ()),
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m_BufferOffset (0),
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m_SocketType (eSAMSocketTypeUnknown), m_IsSilent (false),
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m_IsAccepting (false), m_Stream (nullptr)
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{
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}
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SAMSocket::~SAMSocket ()
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{
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m_Stream = nullptr;
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}
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void SAMSocket::Terminate (const char* reason)
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{
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if(m_Stream)
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{
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m_Stream->AsyncClose ();
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m_Stream = nullptr;
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}
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auto Session = m_Owner.FindSession(m_ID);
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switch (m_SocketType)
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{
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case eSAMSocketTypeSession:
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m_Owner.CloseSession (m_ID);
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break;
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case eSAMSocketTypeStream:
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{
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break;
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}
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case eSAMSocketTypeAcceptor:
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case eSAMSocketTypeForward:
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{
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if (Session)
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{
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if (m_IsAccepting && Session->GetLocalDestination ())
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Session->GetLocalDestination ()->StopAcceptingStreams ();
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}
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break;
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}
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default: ;
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}
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m_SocketType = eSAMSocketTypeTerminated;
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if (m_Socket.is_open ())
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{
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boost::system::error_code ec;
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m_Socket.shutdown (boost::asio::ip::tcp::socket::shutdown_both, ec);
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m_Socket.close ();
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}
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m_Owner.RemoveSocket(shared_from_this());
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}
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void SAMSocket::ReceiveHandshake ()
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{
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m_Socket.async_read_some (boost::asio::buffer(m_Buffer, SAM_SOCKET_BUFFER_SIZE),
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std::bind(&SAMSocket::HandleHandshakeReceived, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2));
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}
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static bool SAMVersionAcceptable(const std::string & ver)
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{
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return ver == "3.0" || ver == "3.1";
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}
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static bool SAMVersionTooLow(const std::string & ver)
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{
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return ver.size() && ver[0] < '3';
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}
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static bool SAMVersionTooHigh(const std::string & ver)
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{
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return ver.size() && ver > "3.1";
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}
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void SAMSocket::HandleHandshakeReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (ecode)
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{
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LogPrint (eLogError, "SAM: Handshake read error: ", ecode.message ());
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if (ecode != boost::asio::error::operation_aborted)
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Terminate ("SAM: handshake read error");
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}
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else
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{
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m_Buffer[bytes_transferred] = 0;
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char * eol = (char *)memchr (m_Buffer, '\n', bytes_transferred);
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if (eol)
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*eol = 0;
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LogPrint (eLogDebug, "SAM: Handshake ", m_Buffer);
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char * separator = strchr (m_Buffer, ' ');
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if (separator)
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{
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separator = strchr (separator + 1, ' ');
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if (separator)
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*separator = 0;
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}
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if (!strcmp (m_Buffer, SAM_HANDSHAKE))
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{
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std::string maxver("3.1");
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std::string minver("3.0");
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// try to find MIN and MAX, 3.0 if not found
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if (separator)
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{
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separator++;
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std::map<std::string, std::string> params;
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ExtractParams (separator, params);
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auto it = params.find (SAM_PARAM_MAX);
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if (it != params.end ())
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maxver = it->second;
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it = params.find(SAM_PARAM_MIN);
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if (it != params.end ())
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minver = it->second;
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}
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// version negotiation
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std::string version;
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if (SAMVersionAcceptable(maxver))
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{
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version = maxver;
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}
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else if (SAMVersionAcceptable(minver))
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{
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version = minver;
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}
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else if (SAMVersionTooLow(minver) && SAMVersionTooHigh(maxver))
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{
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version = "3.0";
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}
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if (SAMVersionAcceptable(version))
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{
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#ifdef _MSC_VER
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size_t l = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_HANDSHAKE_REPLY, version.c_str ());
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#else
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size_t l = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_HANDSHAKE_REPLY, version.c_str ());
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#endif
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boost::asio::async_write (m_Socket, boost::asio::buffer (m_Buffer, l), boost::asio::transfer_all (),
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std::bind(&SAMSocket::HandleHandshakeReplySent, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2));
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}
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else
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SendMessageReply (SAM_HANDSHAKE_NOVERSION, strlen (SAM_HANDSHAKE_NOVERSION), true);
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}
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else
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{
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LogPrint (eLogError, "SAM: Handshake mismatch");
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Terminate ("SAM: handshake mismatch");
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}
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}
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}
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bool SAMSocket::IsSession(const std::string & id) const
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{
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return id == m_ID;
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}
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void SAMSocket::HandleHandshakeReplySent (const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (ecode)
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{
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LogPrint (eLogError, "SAM: Handshake reply send error: ", ecode.message ());
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if (ecode != boost::asio::error::operation_aborted)
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Terminate ("SAM: handshake reply send error");
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}
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else
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{
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m_Socket.async_read_some (boost::asio::buffer(m_Buffer, SAM_SOCKET_BUFFER_SIZE),
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std::bind(&SAMSocket::HandleMessage, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2));
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}
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}
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void SAMSocket::SendMessageReply (const char * msg, size_t len, bool close)
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{
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LogPrint (eLogDebug, "SAMSocket::SendMessageReply, close=",close?"true":"false", " reason: ", msg);
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if (!m_IsSilent || m_SocketType == eSAMSocketTypeForward)
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boost::asio::async_write (m_Socket, boost::asio::buffer (msg, len), boost::asio::transfer_all (),
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std::bind(&SAMSocket::HandleMessageReplySent, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2, close));
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else
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{
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if (close)
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Terminate ("SAMSocket::SendMessageReply(close=true)");
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else
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Receive ();
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}
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}
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void SAMSocket::HandleMessageReplySent (const boost::system::error_code& ecode, std::size_t bytes_transferred, bool close)
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{
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if (ecode)
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{
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LogPrint (eLogError, "SAM: Reply send error: ", ecode.message ());
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if (ecode != boost::asio::error::operation_aborted)
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Terminate ("SAM: reply send error");
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}
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else
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{
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if (close)
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Terminate ("SAMSocket::HandleMessageReplySent(close=true)");
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else
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Receive ();
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}
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}
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void SAMSocket::HandleMessage (const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (ecode)
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{
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LogPrint (eLogError, "SAM: Read error: ", ecode.message ());
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if (ecode != boost::asio::error::operation_aborted)
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Terminate ("SAM: read error");
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}
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else if (m_SocketType == eSAMSocketTypeStream)
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HandleReceived (ecode, bytes_transferred);
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else
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{
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bytes_transferred += m_BufferOffset;
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m_BufferOffset = 0;
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m_Buffer[bytes_transferred] = 0;
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char * eol = (char *)memchr (m_Buffer, '\n', bytes_transferred);
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if (eol)
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{
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if (eol > m_Buffer && eol[-1] == '\r') eol--;
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*eol = 0;
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char * separator = strchr (m_Buffer, ' ');
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if (separator)
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{
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separator = strchr (separator + 1, ' ');
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if (separator)
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*separator = 0;
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else
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separator = eol;
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if (!strcmp (m_Buffer, SAM_SESSION_CREATE))
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ProcessSessionCreate (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_STREAM_CONNECT))
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ProcessStreamConnect (separator + 1, bytes_transferred - (separator - m_Buffer) - 1, bytes_transferred - (eol - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_STREAM_ACCEPT))
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ProcessStreamAccept (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_STREAM_FORWARD))
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ProcessStreamForward (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_DEST_GENERATE))
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ProcessDestGenerate (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_NAMING_LOOKUP))
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ProcessNamingLookup (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_SESSION_ADD))
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ProcessSessionAdd (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_SESSION_REMOVE))
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ProcessSessionRemove (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
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else if (!strcmp (m_Buffer, SAM_DATAGRAM_SEND) || !strcmp (m_Buffer, SAM_RAW_SEND))
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{
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size_t len = bytes_transferred - (separator - m_Buffer) - 1;
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size_t processed = ProcessDatagramSend (separator + 1, len, eol + 1);
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if (processed < len)
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{
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m_BufferOffset = len - processed;
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if (processed > 0)
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memmove (m_Buffer, separator + 1 + processed, m_BufferOffset);
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else
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{
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// restore string back
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*separator = ' ';
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*eol = '\n';
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}
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}
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// since it's SAM v1 reply is not expected
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Receive ();
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}
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else
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{
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LogPrint (eLogError, "SAM: Unexpected message ", m_Buffer);
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Terminate ("SAM: unexpected message");
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}
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}
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else
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{
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LogPrint (eLogError, "SAM: Malformed message ", m_Buffer);
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Terminate ("malformed message");
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}
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}
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else
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{
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LogPrint (eLogWarning, "SAM: Incomplete message ", bytes_transferred);
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m_BufferOffset = bytes_transferred;
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// try to receive remaining message
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Receive ();
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}
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}
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}
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static bool IsAcceptableSessionName(const std::string & str)
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{
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auto itr = str.begin();
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while(itr != str.end())
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{
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char ch = *itr;
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++itr;
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if (ch == '<' || ch == '>' || ch == '"' || ch == '\'' || ch == '/')
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return false;
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}
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return true;
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}
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void SAMSocket::ProcessSessionCreate (char * buf, size_t len)
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{
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LogPrint (eLogDebug, "SAM: Session create: ", buf);
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std::map<std::string, std::string> params;
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ExtractParams (buf, params);
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std::string& style = params[SAM_PARAM_STYLE];
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std::string& id = params[SAM_PARAM_ID];
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std::string& destination = params[SAM_PARAM_DESTINATION];
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if(!IsAcceptableSessionName(id))
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{
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// invalid session id
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SendMessageReply (SAM_SESSION_CREATE_INVALID_ID, strlen(SAM_SESSION_CREATE_INVALID_ID), true);
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return;
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}
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m_ID = id;
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if (m_Owner.FindSession (id))
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{
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// session exists
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SendMessageReply (SAM_SESSION_CREATE_DUPLICATED_ID, strlen(SAM_SESSION_CREATE_DUPLICATED_ID), true);
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return;
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}
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SAMSessionType type = eSAMSessionTypeUnknown;
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if (style == SAM_VALUE_STREAM) type = eSAMSessionTypeStream;
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else if (style == SAM_VALUE_DATAGRAM) type = eSAMSessionTypeDatagram;
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else if (style == SAM_VALUE_RAW) type = eSAMSessionTypeRaw;
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else if (style == SAM_VALUE_MASTER) type = eSAMSessionTypeMaster;
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if (type == eSAMSessionTypeUnknown)
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{
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// unknown style
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SendSessionI2PError("Unknown STYLE");
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return;
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}
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std::shared_ptr<boost::asio::ip::udp::endpoint> forward = nullptr;
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if ((type == eSAMSessionTypeDatagram || type == eSAMSessionTypeRaw) &&
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params.find(SAM_PARAM_HOST) != params.end() && params.find(SAM_PARAM_PORT) != params.end())
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{
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// udp forward selected
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boost::system::error_code e;
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// TODO: support hostnames in udp forward
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auto addr = boost::asio::ip::address::from_string(params[SAM_PARAM_HOST], e);
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if (e)
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{
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// not an ip address
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SendSessionI2PError("Invalid IP Address in HOST");
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return;
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}
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auto port = std::stoi(params[SAM_PARAM_PORT]);
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if (port == -1)
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{
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SendSessionI2PError("Invalid port");
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return;
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}
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forward = std::make_shared<boost::asio::ip::udp::endpoint>(addr, port);
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}
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//ensure we actually received a destination
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if (destination.empty())
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{
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SendMessageReply (SAM_SESSION_STATUS_INVALID_KEY, strlen(SAM_SESSION_STATUS_INVALID_KEY), true);
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return;
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}
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if (destination != SAM_VALUE_TRANSIENT)
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{
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//ensure it's a base64 string
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i2p::data::PrivateKeys keys;
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if (!keys.FromBase64(destination))
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{
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SendMessageReply(SAM_SESSION_STATUS_INVALID_KEY, strlen(SAM_SESSION_STATUS_INVALID_KEY), true);
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return;
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}
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}
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// create destination
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auto session = m_Owner.CreateSession (id, type, destination == SAM_VALUE_TRANSIENT ? "" : destination, ¶ms);
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if (session)
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{
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m_SocketType = eSAMSocketTypeSession;
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if (type == eSAMSessionTypeDatagram || type == eSAMSessionTypeRaw)
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{
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session->UDPEndpoint = forward;
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auto dest = session->GetLocalDestination ()->CreateDatagramDestination ();
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auto port = std::stoi(params[SAM_PARAM_PORT]);
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if (type == eSAMSessionTypeDatagram)
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dest->SetReceiver (std::bind (&SAMSocket::HandleI2PDatagramReceive, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4, std::placeholders::_5),
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port
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);
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else // raw
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dest->SetRawReceiver (std::bind (&SAMSocket::HandleI2PRawDatagramReceive, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4),
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port
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);
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}
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if (session->GetLocalDestination ()->IsReady ())
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SendSessionCreateReplyOk ();
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else
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{
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m_Timer.expires_from_now (boost::posix_time::seconds(SAM_SESSION_READINESS_CHECK_INTERVAL));
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m_Timer.async_wait (std::bind (&SAMSocket::HandleSessionReadinessCheckTimer,
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shared_from_this (), std::placeholders::_1));
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}
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}
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else
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SendMessageReply (SAM_SESSION_CREATE_DUPLICATED_DEST, strlen(SAM_SESSION_CREATE_DUPLICATED_DEST), true);
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}
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void SAMSocket::HandleSessionReadinessCheckTimer (const boost::system::error_code& ecode)
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{
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if (ecode != boost::asio::error::operation_aborted)
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{
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if (m_Socket.is_open ())
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{
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auto session = m_Owner.FindSession(m_ID);
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if(session)
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{
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if (session->GetLocalDestination ()->IsReady ())
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SendSessionCreateReplyOk ();
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else
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{
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m_Timer.expires_from_now (boost::posix_time::seconds(SAM_SESSION_READINESS_CHECK_INTERVAL));
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m_Timer.async_wait (std::bind (&SAMSocket::HandleSessionReadinessCheckTimer,
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shared_from_this (), std::placeholders::_1));
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}
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}
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}
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else
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Terminate ("SAM: session socket closed");
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}
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}
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void SAMSocket::SendSessionCreateReplyOk ()
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{
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auto session = m_Owner.FindSession(m_ID);
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if (session)
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{
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uint8_t buf[1024];
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char priv[1024];
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size_t l = session->GetLocalDestination ()->GetPrivateKeys ().ToBuffer (buf, 1024);
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size_t l1 = i2p::data::ByteStreamToBase64 (buf, l, priv, 1024);
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priv[l1] = 0;
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#ifdef _MSC_VER
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size_t l2 = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_CREATE_REPLY_OK, priv);
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#else
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size_t l2 = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_CREATE_REPLY_OK, priv);
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#endif
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SendMessageReply (m_Buffer, l2, false);
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}
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}
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|
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void SAMSocket::ProcessStreamConnect (char * buf, size_t len, size_t rem)
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{
|
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LogPrint (eLogDebug, "SAM: Stream connect: ", buf);
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if ( m_SocketType != eSAMSocketTypeUnknown)
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{
|
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SendSessionI2PError ("Socket already in use");
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return;
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}
|
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std::map<std::string, std::string> params;
|
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ExtractParams (buf, params);
|
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std::string& id = params[SAM_PARAM_ID];
|
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std::string& destination = params[SAM_PARAM_DESTINATION];
|
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std::string& silent = params[SAM_PARAM_SILENT];
|
|
if (silent == SAM_VALUE_TRUE) m_IsSilent = true;
|
|
m_ID = id;
|
|
auto session = m_Owner.FindSession (id);
|
|
if (session)
|
|
{
|
|
if (rem > 0) // handle follow on data
|
|
{
|
|
memmove (m_Buffer, buf + len + 1, rem); // buf is a pointer to m_Buffer's content
|
|
m_BufferOffset = rem;
|
|
}
|
|
else
|
|
m_BufferOffset = 0;
|
|
|
|
std::shared_ptr<const Address> addr;
|
|
if (destination.find(".i2p") != std::string::npos)
|
|
addr = context.GetAddressBook().GetAddress (destination);
|
|
else
|
|
{
|
|
auto dest = std::make_shared<i2p::data::IdentityEx> ();
|
|
size_t l = dest->FromBase64(destination);
|
|
if (l > 0)
|
|
{
|
|
context.GetAddressBook().InsertFullAddress(dest);
|
|
addr = std::make_shared<Address>(dest->GetIdentHash ());
|
|
}
|
|
}
|
|
|
|
if (addr && addr->IsValid ())
|
|
{
|
|
if (addr->IsIdentHash ())
|
|
{
|
|
if (session->GetLocalDestination ()->GetIdentHash () != addr->identHash)
|
|
{
|
|
auto leaseSet = session->GetLocalDestination ()->FindLeaseSet(addr->identHash);
|
|
if (leaseSet)
|
|
Connect(leaseSet, session);
|
|
else
|
|
{
|
|
session->GetLocalDestination ()->RequestDestination(addr->identHash,
|
|
std::bind(&SAMSocket::HandleConnectLeaseSetRequestComplete,
|
|
shared_from_this(), std::placeholders::_1));
|
|
}
|
|
}
|
|
else
|
|
SendStreamCantReachPeer ("Can't connect to myself");
|
|
}
|
|
else // B33
|
|
session->GetLocalDestination ()->RequestDestinationWithEncryptedLeaseSet (addr->blindedPublicKey,
|
|
std::bind(&SAMSocket::HandleConnectLeaseSetRequestComplete,
|
|
shared_from_this(), std::placeholders::_1));
|
|
}
|
|
else
|
|
SendMessageReply (SAM_STREAM_STATUS_INVALID_KEY, strlen(SAM_STREAM_STATUS_INVALID_KEY), true);
|
|
}
|
|
else
|
|
SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
|
|
}
|
|
|
|
void SAMSocket::Connect (std::shared_ptr<const i2p::data::LeaseSet> remote, std::shared_ptr<SAMSession> session)
|
|
{
|
|
if (!session) session = m_Owner.FindSession(m_ID);
|
|
if (session)
|
|
{
|
|
if (session->GetLocalDestination ()->SupportsEncryptionType (remote->GetEncryptionType ()))
|
|
{
|
|
m_SocketType = eSAMSocketTypeStream;
|
|
m_Stream = session->GetLocalDestination ()->CreateStream (remote);
|
|
if (m_Stream)
|
|
{
|
|
m_Stream->Send ((uint8_t *)m_Buffer, m_BufferOffset); // connect and send
|
|
m_BufferOffset = 0;
|
|
I2PReceive ();
|
|
SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
|
|
}
|
|
else
|
|
SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
|
|
}
|
|
else
|
|
SendStreamCantReachPeer ("Incompatible crypto");
|
|
}
|
|
else
|
|
SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
|
|
}
|
|
|
|
void SAMSocket::HandleConnectLeaseSetRequestComplete (std::shared_ptr<i2p::data::LeaseSet> leaseSet)
|
|
{
|
|
if (leaseSet)
|
|
Connect (leaseSet);
|
|
else
|
|
{
|
|
LogPrint (eLogError, "SAM: Destination to connect not found");
|
|
SendStreamCantReachPeer ("LeaseSet not found");
|
|
}
|
|
}
|
|
|
|
void SAMSocket::ProcessStreamAccept (char * buf, size_t len)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Stream accept: ", buf);
|
|
if ( m_SocketType != eSAMSocketTypeUnknown)
|
|
{
|
|
SendSessionI2PError ("Socket already in use");
|
|
return;
|
|
}
|
|
std::map<std::string, std::string> params;
|
|
ExtractParams (buf, params);
|
|
std::string& id = params[SAM_PARAM_ID];
|
|
std::string& silent = params[SAM_PARAM_SILENT];
|
|
if (silent == SAM_VALUE_TRUE) m_IsSilent = true;
|
|
m_ID = id;
|
|
auto session = m_Owner.FindSession (id);
|
|
if (session)
|
|
{
|
|
m_SocketType = eSAMSocketTypeAcceptor;
|
|
if (!session->GetLocalDestination ()->IsAcceptingStreams ())
|
|
{
|
|
m_IsAccepting = true;
|
|
SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
|
|
session->GetLocalDestination ()->AcceptOnce (std::bind (&SAMSocket::HandleI2PAccept, shared_from_this (), std::placeholders::_1));
|
|
}
|
|
else
|
|
{
|
|
auto ts = i2p::util::GetSecondsSinceEpoch ();
|
|
while (!session->acceptQueue.empty () && session->acceptQueue.front ().second + SAM_SESSION_MAX_ACCEPT_INTERVAL > ts)
|
|
{
|
|
auto socket = session->acceptQueue.front ().first;
|
|
session->acceptQueue.pop_front ();
|
|
if (socket)
|
|
m_Owner.GetService ().post (std::bind(&SAMSocket::TerminateClose, socket));
|
|
}
|
|
if (session->acceptQueue.size () < SAM_SESSION_MAX_ACCEPT_QUEUE_SIZE)
|
|
{
|
|
// already accepting, queue up
|
|
SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
|
|
session->acceptQueue.push_back (std::make_pair(shared_from_this(), ts));
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogInfo, "SAM: Session ", m_ID, " accept queue is full ", session->acceptQueue.size ());
|
|
SendStreamI2PError ("Already accepting");
|
|
}
|
|
}
|
|
}
|
|
else
|
|
SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
|
|
}
|
|
|
|
void SAMSocket::ProcessStreamForward (char * buf, size_t len)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Stream forward: ", buf);
|
|
std::map<std::string, std::string> params;
|
|
ExtractParams (buf, params);
|
|
std::string& id = params[SAM_PARAM_ID];
|
|
auto session = m_Owner.FindSession (id);
|
|
if (!session)
|
|
{
|
|
SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
|
|
return;
|
|
}
|
|
if (session->GetLocalDestination ()->IsAcceptingStreams ())
|
|
{
|
|
SendSessionI2PError ("Already accepting");
|
|
return;
|
|
}
|
|
auto it = params.find (SAM_PARAM_PORT);
|
|
if (it == params.end ())
|
|
{
|
|
SendSessionI2PError ("PORT is missing");
|
|
return;
|
|
}
|
|
auto port = std::stoi (it->second);
|
|
if (port <= 0 || port >= 0xFFFF)
|
|
{
|
|
SendSessionI2PError ("Invalid PORT");
|
|
return;
|
|
}
|
|
boost::system::error_code ec;
|
|
auto ep = m_Socket.remote_endpoint (ec);
|
|
if (ec)
|
|
{
|
|
SendSessionI2PError ("Socket error");
|
|
return;
|
|
}
|
|
ep.port (port);
|
|
m_SocketType = eSAMSocketTypeForward;
|
|
m_ID = id;
|
|
m_IsAccepting = true;
|
|
std::string& silent = params[SAM_PARAM_SILENT];
|
|
if (silent == SAM_VALUE_TRUE) m_IsSilent = true;
|
|
session->GetLocalDestination ()->AcceptStreams (std::bind (&SAMSocket::HandleI2PForward,
|
|
shared_from_this (), std::placeholders::_1, ep));
|
|
SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
|
|
}
|
|
|
|
size_t SAMSocket::ProcessDatagramSend (char * buf, size_t len, const char * data)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Datagram send: ", buf, " ", len);
|
|
std::map<std::string, std::string> params;
|
|
ExtractParams (buf, params);
|
|
size_t size = std::stoi(params[SAM_PARAM_SIZE]), offset = data - buf;
|
|
if (offset + size <= len)
|
|
{
|
|
auto session = m_Owner.FindSession(m_ID);
|
|
if (session)
|
|
{
|
|
auto d = session->GetLocalDestination ()->GetDatagramDestination ();
|
|
if (d)
|
|
{
|
|
i2p::data::IdentityEx dest;
|
|
dest.FromBase64 (params[SAM_PARAM_DESTINATION]);
|
|
if (session->Type == eSAMSessionTypeDatagram)
|
|
d->SendDatagramTo ((const uint8_t *)data, size, dest.GetIdentHash ());
|
|
else // raw
|
|
d->SendRawDatagramTo ((const uint8_t *)data, size, dest.GetIdentHash ());
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Missing datagram destination");
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Session is not created from DATAGRAM SEND");
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogWarning, "SAM: Sent datagram size ", size, " exceeds buffer ", len - offset);
|
|
return 0; // try to receive more
|
|
}
|
|
return offset + size;
|
|
}
|
|
|
|
void SAMSocket::ProcessDestGenerate (char * buf, size_t len)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Dest generate");
|
|
std::map<std::string, std::string> params;
|
|
ExtractParams (buf, params);
|
|
// extract signature type
|
|
i2p::data::SigningKeyType signatureType = i2p::data::SIGNING_KEY_TYPE_DSA_SHA1;
|
|
i2p::data::CryptoKeyType cryptoType = i2p::data::CRYPTO_KEY_TYPE_ELGAMAL;
|
|
auto it = params.find (SAM_PARAM_SIGNATURE_TYPE);
|
|
if (it != params.end ())
|
|
{
|
|
if (!m_Owner.ResolveSignatureType (it->second, signatureType))
|
|
LogPrint (eLogWarning, "SAM: ", SAM_PARAM_SIGNATURE_TYPE, " is invalid ", it->second);
|
|
}
|
|
it = params.find (SAM_PARAM_CRYPTO_TYPE);
|
|
if (it != params.end ())
|
|
{
|
|
try
|
|
{
|
|
cryptoType = std::stoi(it->second);
|
|
}
|
|
catch (const std::exception& ex)
|
|
{
|
|
LogPrint (eLogWarning, "SAM: ", SAM_PARAM_CRYPTO_TYPE, "error: ", ex.what ());
|
|
}
|
|
}
|
|
auto keys = i2p::data::PrivateKeys::CreateRandomKeys (signatureType, cryptoType, true);
|
|
#ifdef _MSC_VER
|
|
size_t l = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_DEST_REPLY,
|
|
keys.GetPublic ()->ToBase64 ().c_str (), keys.ToBase64 ().c_str ());
|
|
#else
|
|
size_t l = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_DEST_REPLY,
|
|
keys.GetPublic ()->ToBase64 ().c_str (), keys.ToBase64 ().c_str ());
|
|
#endif
|
|
SendMessageReply (m_Buffer, l, false);
|
|
}
|
|
|
|
void SAMSocket::ProcessNamingLookup (char * buf, size_t len)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Naming lookup: ", buf);
|
|
std::map<std::string, std::string> params;
|
|
ExtractParams (buf, params);
|
|
std::string& name = params[SAM_PARAM_NAME];
|
|
std::shared_ptr<const i2p::data::IdentityEx> identity;
|
|
std::shared_ptr<const Address> addr;
|
|
auto session = m_Owner.FindSession(m_ID);
|
|
auto dest = session == nullptr ? context.GetSharedLocalDestination() : session->GetLocalDestination ();
|
|
if (name == "ME")
|
|
SendNamingLookupReply (name, dest->GetIdentity ());
|
|
else if ((identity = context.GetAddressBook ().GetFullAddress (name)) != nullptr)
|
|
SendNamingLookupReply (name, identity);
|
|
else if ((addr = context.GetAddressBook ().GetAddress (name)))
|
|
{
|
|
if (addr->IsIdentHash ())
|
|
{
|
|
auto leaseSet = dest->FindLeaseSet (addr->identHash);
|
|
if (leaseSet)
|
|
SendNamingLookupReply (name, leaseSet->GetIdentity ());
|
|
else
|
|
dest->RequestDestination (addr->identHash,
|
|
std::bind (&SAMSocket::HandleNamingLookupLeaseSetRequestComplete,
|
|
shared_from_this (), std::placeholders::_1, name));
|
|
}
|
|
else
|
|
dest->RequestDestinationWithEncryptedLeaseSet (addr->blindedPublicKey,
|
|
std::bind (&SAMSocket::HandleNamingLookupLeaseSetRequestComplete,
|
|
shared_from_this (), std::placeholders::_1, name));
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogError, "SAM: Naming failed, unknown address ", name);
|
|
#ifdef _MSC_VER
|
|
size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_INVALID_KEY, name.c_str());
|
|
#else
|
|
size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_INVALID_KEY, name.c_str());
|
|
#endif
|
|
SendMessageReply (m_Buffer, len, false);
|
|
}
|
|
}
|
|
|
|
void SAMSocket::ProcessSessionAdd (char * buf, size_t len)
|
|
{
|
|
auto session = m_Owner.FindSession(m_ID);
|
|
if (session && session->Type == eSAMSessionTypeMaster)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Subsession add: ", buf);
|
|
auto masterSession = std::static_pointer_cast<SAMMasterSession>(session);
|
|
std::map<std::string, std::string> params;
|
|
ExtractParams (buf, params);
|
|
std::string& id = params[SAM_PARAM_ID];
|
|
if (masterSession->subsessions.count (id) > 1)
|
|
{
|
|
// session exists
|
|
SendMessageReply (SAM_SESSION_CREATE_DUPLICATED_ID, strlen(SAM_SESSION_CREATE_DUPLICATED_ID), false);
|
|
return;
|
|
}
|
|
std::string& style = params[SAM_PARAM_STYLE];
|
|
SAMSessionType type = eSAMSessionTypeUnknown;
|
|
if (style == SAM_VALUE_STREAM) type = eSAMSessionTypeStream;
|
|
// TODO: implement other styles
|
|
if (type == eSAMSessionTypeUnknown)
|
|
{
|
|
// unknown style
|
|
SendSessionI2PError("Unsupported STYLE");
|
|
return;
|
|
}
|
|
auto fromPort = std::stoi(params[SAM_PARAM_FROM_PORT]);
|
|
if (fromPort == -1)
|
|
{
|
|
SendSessionI2PError("Invalid from port");
|
|
return;
|
|
}
|
|
auto subsession = std::make_shared<SAMSubSession>(masterSession, id, type, fromPort);
|
|
if (m_Owner.AddSession (subsession))
|
|
{
|
|
masterSession->subsessions.insert (id);
|
|
SendSessionCreateReplyOk ();
|
|
}
|
|
else
|
|
SendMessageReply (SAM_SESSION_CREATE_DUPLICATED_ID, strlen(SAM_SESSION_CREATE_DUPLICATED_ID), false);
|
|
}
|
|
else
|
|
SendSessionI2PError ("Wrong session type");
|
|
}
|
|
|
|
void SAMSocket::ProcessSessionRemove (char * buf, size_t len)
|
|
{
|
|
auto session = m_Owner.FindSession(m_ID);
|
|
if (session && session->Type == eSAMSessionTypeMaster)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Subsession remove: ", buf);
|
|
auto masterSession = std::static_pointer_cast<SAMMasterSession>(session);
|
|
std::map<std::string, std::string> params;
|
|
ExtractParams (buf, params);
|
|
std::string& id = params[SAM_PARAM_ID];
|
|
if (!masterSession->subsessions.erase (id))
|
|
{
|
|
SendMessageReply (SAM_SESSION_STATUS_INVALID_KEY, strlen(SAM_SESSION_STATUS_INVALID_KEY), false);
|
|
return;
|
|
}
|
|
m_Owner.CloseSession (id);
|
|
SendSessionCreateReplyOk ();
|
|
}
|
|
else
|
|
SendSessionI2PError ("Wrong session type");
|
|
}
|
|
|
|
void SAMSocket::SendReplyWithMessage (const char * reply, const std::string & msg)
|
|
{
|
|
#ifdef _MSC_VER
|
|
size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, reply, msg.c_str());
|
|
#else
|
|
size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, reply, msg.c_str());
|
|
#endif
|
|
SendMessageReply (m_Buffer, len, true);
|
|
}
|
|
|
|
void SAMSocket::SendSessionI2PError(const std::string & msg)
|
|
{
|
|
LogPrint (eLogError, "SAM: Session I2P error: ", msg);
|
|
SendReplyWithMessage (SAM_SESSION_STATUS_I2P_ERROR, msg);
|
|
}
|
|
|
|
void SAMSocket::SendStreamI2PError(const std::string & msg)
|
|
{
|
|
LogPrint (eLogError, "SAM: Stream I2P error: ", msg);
|
|
SendReplyWithMessage (SAM_STREAM_STATUS_I2P_ERROR, msg);
|
|
}
|
|
|
|
void SAMSocket::SendStreamCantReachPeer(const std::string & msg)
|
|
{
|
|
SendReplyWithMessage (SAM_STREAM_STATUS_CANT_REACH_PEER, msg);
|
|
}
|
|
|
|
void SAMSocket::HandleNamingLookupLeaseSetRequestComplete (std::shared_ptr<i2p::data::LeaseSet> leaseSet, std::string name)
|
|
{
|
|
if (leaseSet)
|
|
{
|
|
context.GetAddressBook ().InsertFullAddress (leaseSet->GetIdentity ());
|
|
SendNamingLookupReply (name, leaseSet->GetIdentity ());
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogError, "SAM: Naming lookup failed. LeaseSet for ", name, " not found");
|
|
#ifdef _MSC_VER
|
|
size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_INVALID_KEY, name.c_str());
|
|
#else
|
|
size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_INVALID_KEY, name.c_str());
|
|
#endif
|
|
SendMessageReply (m_Buffer, len, false);
|
|
}
|
|
}
|
|
|
|
void SAMSocket::SendNamingLookupReply (const std::string& name, std::shared_ptr<const i2p::data::IdentityEx> identity)
|
|
{
|
|
auto base64 = identity->ToBase64 ();
|
|
#ifdef _MSC_VER
|
|
size_t l = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY, name.c_str (), base64.c_str ());
|
|
#else
|
|
size_t l = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY, name.c_str (), base64.c_str ());
|
|
#endif
|
|
SendMessageReply (m_Buffer, l, false);
|
|
}
|
|
|
|
void SAMSocket::ExtractParams (char * buf, std::map<std::string, std::string>& params)
|
|
{
|
|
char * separator;
|
|
do
|
|
{
|
|
separator = strchr (buf, ' ');
|
|
if (separator) *separator = 0;
|
|
char * value = strchr (buf, '=');
|
|
if (value)
|
|
{
|
|
*value = 0;
|
|
value++;
|
|
params[buf] = value;
|
|
}
|
|
buf = separator + 1;
|
|
}
|
|
while (separator);
|
|
}
|
|
|
|
void SAMSocket::Receive ()
|
|
{
|
|
m_Socket.async_read_some (boost::asio::buffer(m_Buffer + m_BufferOffset, SAM_SOCKET_BUFFER_SIZE - m_BufferOffset),
|
|
std::bind((m_SocketType == eSAMSocketTypeStream) ? &SAMSocket::HandleReceived : &SAMSocket::HandleMessage,
|
|
shared_from_this (), std::placeholders::_1, std::placeholders::_2));
|
|
}
|
|
|
|
void SAMSocket::HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
|
|
{
|
|
if (ecode)
|
|
{
|
|
LogPrint (eLogError, "SAM: Read error: ", ecode.message ());
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
Terminate ("read error");
|
|
}
|
|
else
|
|
{
|
|
if (m_Stream)
|
|
{
|
|
bytes_transferred += m_BufferOffset;
|
|
m_BufferOffset = 0;
|
|
m_Stream->AsyncSend ((uint8_t *)m_Buffer, bytes_transferred,
|
|
std::bind(&SAMSocket::HandleStreamSend, shared_from_this(), std::placeholders::_1));
|
|
}
|
|
else
|
|
{
|
|
Terminate("No Stream Remaining");
|
|
}
|
|
}
|
|
}
|
|
|
|
void SAMSocket::I2PReceive ()
|
|
{
|
|
if (m_Stream)
|
|
{
|
|
if (m_Stream->GetStatus () == i2p::stream::eStreamStatusNew ||
|
|
m_Stream->GetStatus () == i2p::stream::eStreamStatusOpen) // regular
|
|
{
|
|
m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, SAM_SOCKET_BUFFER_SIZE),
|
|
std::bind (&SAMSocket::HandleI2PReceive, shared_from_this(),
|
|
std::placeholders::_1, std::placeholders::_2),
|
|
SAM_SOCKET_CONNECTION_MAX_IDLE);
|
|
}
|
|
else // closed by peer
|
|
{
|
|
uint8_t * buff = new uint8_t[SAM_SOCKET_BUFFER_SIZE];
|
|
// get remaining data
|
|
auto len = m_Stream->ReadSome (buff, SAM_SOCKET_BUFFER_SIZE);
|
|
if (len > 0) // still some data
|
|
{
|
|
WriteI2PDataImmediate(buff, len);
|
|
}
|
|
else // no more data
|
|
{
|
|
delete [] buff;
|
|
Terminate ("no more data");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void SAMSocket::WriteI2PDataImmediate(uint8_t * buff, size_t sz)
|
|
{
|
|
boost::asio::async_write (
|
|
m_Socket,
|
|
boost::asio::buffer (buff, sz),
|
|
boost::asio::transfer_all(),
|
|
std::bind (&SAMSocket::HandleWriteI2PDataImmediate, shared_from_this (), std::placeholders::_1, buff)); // postpone termination
|
|
}
|
|
|
|
void SAMSocket::HandleWriteI2PDataImmediate(const boost::system::error_code & ec, uint8_t * buff)
|
|
{
|
|
delete [] buff;
|
|
}
|
|
|
|
void SAMSocket::WriteI2PData(size_t sz)
|
|
{
|
|
boost::asio::async_write (
|
|
m_Socket,
|
|
boost::asio::buffer (m_StreamBuffer, sz),
|
|
boost::asio::transfer_all(),
|
|
std::bind(&SAMSocket::HandleWriteI2PData, shared_from_this(), std::placeholders::_1, std::placeholders::_2));
|
|
}
|
|
|
|
void SAMSocket::HandleI2PReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
|
|
{
|
|
if (ecode)
|
|
{
|
|
LogPrint (eLogError, "SAM: Stream read error: ", ecode.message ());
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
{
|
|
if (bytes_transferred > 0)
|
|
{
|
|
WriteI2PData(bytes_transferred);
|
|
}
|
|
else
|
|
{
|
|
auto s = shared_from_this ();
|
|
m_Owner.GetService ().post ([s] { s->Terminate ("stream read error"); });
|
|
}
|
|
}
|
|
else
|
|
{
|
|
auto s = shared_from_this ();
|
|
m_Owner.GetService ().post ([s] { s->Terminate ("stream read error (op aborted)"); });
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (m_SocketType != eSAMSocketTypeTerminated)
|
|
{
|
|
if (bytes_transferred > 0)
|
|
{
|
|
WriteI2PData(bytes_transferred);
|
|
}
|
|
else
|
|
I2PReceive();
|
|
}
|
|
}
|
|
}
|
|
|
|
void SAMSocket::HandleWriteI2PData (const boost::system::error_code& ecode, size_t bytes_transferred)
|
|
{
|
|
if (ecode)
|
|
{
|
|
LogPrint (eLogError, "SAM: Socket write error: ", ecode.message ());
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
Terminate ("socket write error at HandleWriteI2PData");
|
|
}
|
|
else
|
|
{
|
|
I2PReceive ();
|
|
}
|
|
}
|
|
|
|
void SAMSocket::HandleI2PAccept (std::shared_ptr<i2p::stream::Stream> stream)
|
|
{
|
|
if (stream)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Incoming I2P connection for session ", m_ID);
|
|
m_SocketType = eSAMSocketTypeStream;
|
|
m_IsAccepting = false;
|
|
m_Stream = stream;
|
|
context.GetAddressBook ().InsertFullAddress (stream->GetRemoteIdentity ());
|
|
auto session = m_Owner.FindSession (m_ID);
|
|
if (session && !session->acceptQueue.empty ())
|
|
{
|
|
// pending acceptors
|
|
auto ts = i2p::util::GetSecondsSinceEpoch ();
|
|
while (!session->acceptQueue.empty () && session->acceptQueue.front ().second + SAM_SESSION_MAX_ACCEPT_INTERVAL > ts)
|
|
{
|
|
auto socket = session->acceptQueue.front ().first;
|
|
session->acceptQueue.pop_front ();
|
|
if (socket)
|
|
m_Owner.GetService ().post (std::bind(&SAMSocket::TerminateClose, socket));
|
|
}
|
|
if (!session->acceptQueue.empty ())
|
|
{
|
|
auto socket = session->acceptQueue.front ().first;
|
|
session->acceptQueue.pop_front ();
|
|
if (socket && socket->GetSocketType () == eSAMSocketTypeAcceptor)
|
|
{
|
|
socket->m_IsAccepting = true;
|
|
session->GetLocalDestination ()->AcceptOnce (std::bind (&SAMSocket::HandleI2PAccept, socket, std::placeholders::_1));
|
|
}
|
|
}
|
|
}
|
|
if (!m_IsSilent)
|
|
{
|
|
// get remote peer address
|
|
auto ident_ptr = stream->GetRemoteIdentity();
|
|
const size_t ident_len = ident_ptr->GetFullLen();
|
|
uint8_t* ident = new uint8_t[ident_len];
|
|
|
|
// send remote peer address as base64
|
|
const size_t l = ident_ptr->ToBuffer (ident, ident_len);
|
|
const size_t l1 = i2p::data::ByteStreamToBase64 (ident, l, (char *)m_StreamBuffer, SAM_SOCKET_BUFFER_SIZE);
|
|
delete[] ident;
|
|
m_StreamBuffer[l1] = '\n';
|
|
HandleI2PReceive (boost::system::error_code (), l1 +1); // we send identity like it has been received from stream
|
|
}
|
|
else
|
|
I2PReceive ();
|
|
}
|
|
else
|
|
LogPrint (eLogWarning, "SAM: I2P acceptor has been reset");
|
|
}
|
|
|
|
void SAMSocket::HandleI2PForward (std::shared_ptr<i2p::stream::Stream> stream,
|
|
boost::asio::ip::tcp::endpoint ep)
|
|
{
|
|
if (stream)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Incoming forward I2P connection for session ", m_ID);
|
|
auto newSocket = std::make_shared<SAMSocket>(m_Owner);
|
|
newSocket->SetSocketType (eSAMSocketTypeStream);
|
|
auto s = shared_from_this ();
|
|
newSocket->GetSocket ().async_connect (ep,
|
|
[s, newSocket, stream](const boost::system::error_code& ecode)
|
|
{
|
|
if (!ecode)
|
|
{
|
|
s->m_Owner.AddSocket (newSocket);
|
|
newSocket->Receive ();
|
|
newSocket->m_Stream = stream;
|
|
newSocket->m_ID = s->m_ID;
|
|
if (!s->m_IsSilent)
|
|
{
|
|
// get remote peer address
|
|
auto dest = stream->GetRemoteIdentity()->ToBase64 ();
|
|
memcpy (newSocket->m_StreamBuffer, dest.c_str (), dest.length ());
|
|
newSocket->m_StreamBuffer[dest.length ()] = '\n';
|
|
newSocket->HandleI2PReceive (boost::system::error_code (),dest.length () + 1); // we send identity like it has been received from stream
|
|
}
|
|
else
|
|
newSocket->I2PReceive ();
|
|
}
|
|
else
|
|
stream->AsyncClose ();
|
|
});
|
|
}
|
|
else
|
|
LogPrint (eLogWarning, "SAM: I2P forward acceptor has been reset");
|
|
}
|
|
|
|
void SAMSocket::HandleI2PDatagramReceive (const i2p::data::IdentityEx& from, uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Datagram received ", len);
|
|
auto base64 = from.ToBase64 ();
|
|
auto session = m_Owner.FindSession(m_ID);
|
|
if(session)
|
|
{
|
|
auto ep = session->UDPEndpoint;
|
|
if (ep)
|
|
{
|
|
// udp forward enabled
|
|
const char lf = '\n';
|
|
// send to remote endpoint, { destination, linefeed, payload }
|
|
m_Owner.SendTo({ {(const uint8_t *)base64.c_str(), base64.size()}, {(const uint8_t *)&lf, 1}, {buf, len} }, *ep);
|
|
}
|
|
else
|
|
{
|
|
#ifdef _MSC_VER
|
|
size_t l = sprintf_s ((char *)m_StreamBuffer, SAM_SOCKET_BUFFER_SIZE, SAM_DATAGRAM_RECEIVED, base64.c_str (), (long unsigned int)len);
|
|
#else
|
|
size_t l = snprintf ((char *)m_StreamBuffer, SAM_SOCKET_BUFFER_SIZE, SAM_DATAGRAM_RECEIVED, base64.c_str (), (long unsigned int)len);
|
|
#endif
|
|
if (len < SAM_SOCKET_BUFFER_SIZE - l)
|
|
{
|
|
memcpy (m_StreamBuffer + l, buf, len);
|
|
WriteI2PData(len + l);
|
|
}
|
|
else
|
|
LogPrint (eLogWarning, "SAM: Received datagram size ", len," exceeds buffer");
|
|
}
|
|
}
|
|
}
|
|
|
|
void SAMSocket::HandleI2PRawDatagramReceive (uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: Raw datagram received ", len);
|
|
auto session = m_Owner.FindSession(m_ID);
|
|
if(session)
|
|
{
|
|
auto ep = session->UDPEndpoint;
|
|
if (ep)
|
|
// udp forward enabled
|
|
m_Owner.SendTo({ {buf, len} }, *ep);
|
|
else
|
|
{
|
|
#ifdef _MSC_VER
|
|
size_t l = sprintf_s ((char *)m_StreamBuffer, SAM_SOCKET_BUFFER_SIZE, SAM_RAW_RECEIVED, (long unsigned int)len);
|
|
#else
|
|
size_t l = snprintf ((char *)m_StreamBuffer, SAM_SOCKET_BUFFER_SIZE, SAM_RAW_RECEIVED, (long unsigned int)len);
|
|
#endif
|
|
if (len < SAM_SOCKET_BUFFER_SIZE - l)
|
|
{
|
|
memcpy (m_StreamBuffer + l, buf, len);
|
|
WriteI2PData(len + l);
|
|
}
|
|
else
|
|
LogPrint (eLogWarning, "SAM: Received raw datagram size ", len," exceeds buffer");
|
|
}
|
|
}
|
|
}
|
|
|
|
void SAMSocket::HandleStreamSend(const boost::system::error_code & ec)
|
|
{
|
|
m_Owner.GetService ().post (std::bind( !ec ? &SAMSocket::Receive : &SAMSocket::TerminateClose, shared_from_this()));
|
|
}
|
|
|
|
SAMSession::SAMSession (SAMBridge & parent, const std::string & id, SAMSessionType type):
|
|
m_Bridge(parent), Name(id), Type (type), UDPEndpoint(nullptr)
|
|
{
|
|
}
|
|
|
|
void SAMSession::CloseStreams ()
|
|
{
|
|
for(const auto & itr : m_Bridge.ListSockets(Name))
|
|
{
|
|
itr->Terminate(nullptr);
|
|
}
|
|
}
|
|
|
|
SAMSingleSession::SAMSingleSession (SAMBridge & parent, const std::string & name, SAMSessionType type, std::shared_ptr<ClientDestination> dest):
|
|
SAMSession (parent, name, type),
|
|
localDestination (dest)
|
|
{
|
|
}
|
|
|
|
SAMSingleSession::~SAMSingleSession ()
|
|
{
|
|
i2p::client::context.DeleteLocalDestination (localDestination);
|
|
}
|
|
|
|
void SAMSingleSession::StopLocalDestination ()
|
|
{
|
|
localDestination->Release ();
|
|
// stop accepting new streams
|
|
localDestination->StopAcceptingStreams ();
|
|
// terminate existing streams
|
|
auto s = localDestination->GetStreamingDestination (); // TODO: take care about datagrams
|
|
if (s) s->Stop ();
|
|
}
|
|
|
|
void SAMMasterSession::Close ()
|
|
{
|
|
SAMSingleSession::Close ();
|
|
for (const auto& it: subsessions)
|
|
m_Bridge.CloseSession (it);
|
|
subsessions.clear ();
|
|
}
|
|
|
|
SAMSubSession::SAMSubSession (std::shared_ptr<SAMMasterSession> master, const std::string& name, SAMSessionType type, uint16_t port):
|
|
SAMSession (master->m_Bridge, name, type), masterSession (master), inPort (port)
|
|
{
|
|
if (Type == eSAMSessionTypeStream)
|
|
{
|
|
auto d = masterSession->GetLocalDestination ()->CreateStreamingDestination (inPort);
|
|
if (d) d->Start ();
|
|
}
|
|
// TODO: implement datagrams
|
|
}
|
|
|
|
std::shared_ptr<ClientDestination> SAMSubSession::GetLocalDestination ()
|
|
{
|
|
return masterSession ? masterSession->GetLocalDestination () : nullptr;
|
|
}
|
|
|
|
void SAMSubSession::StopLocalDestination ()
|
|
{
|
|
auto dest = GetLocalDestination ();
|
|
if (dest && Type == eSAMSessionTypeStream)
|
|
{
|
|
auto d = dest->RemoveStreamingDestination (inPort);
|
|
if (d) d->Stop ();
|
|
}
|
|
// TODO: implement datagrams
|
|
}
|
|
|
|
SAMBridge::SAMBridge (const std::string& address, uint16_t portTCP, uint16_t portUDP, bool singleThread):
|
|
RunnableService ("SAM"), m_IsSingleThread (singleThread),
|
|
m_Acceptor (GetIOService (), boost::asio::ip::tcp::endpoint(boost::asio::ip::address::from_string(address), portTCP)),
|
|
m_DatagramEndpoint (boost::asio::ip::address::from_string(address), (!portUDP) ? portTCP-1 : portUDP), m_DatagramSocket (GetIOService (), m_DatagramEndpoint),
|
|
m_SignatureTypes
|
|
{
|
|
{"DSA_SHA1", i2p::data::SIGNING_KEY_TYPE_DSA_SHA1},
|
|
{"ECDSA_SHA256_P256", i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256},
|
|
{"ECDSA_SHA384_P384", i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA384_P384},
|
|
{"ECDSA_SHA512_P521", i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA512_P521},
|
|
{"EdDSA_SHA512_Ed25519", i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519},
|
|
{"GOST_GOSTR3411256_GOSTR3410CRYPTOPROA", i2p::data::SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256},
|
|
{"GOST_GOSTR3411512_GOSTR3410TC26A512", i2p::data::SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512},
|
|
{"RedDSA_SHA512_Ed25519", i2p::data::SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519},
|
|
}
|
|
{
|
|
}
|
|
|
|
SAMBridge::~SAMBridge ()
|
|
{
|
|
if (IsRunning ())
|
|
Stop ();
|
|
}
|
|
|
|
void SAMBridge::Start ()
|
|
{
|
|
Accept ();
|
|
ReceiveDatagram ();
|
|
StartIOService ();
|
|
}
|
|
|
|
void SAMBridge::Stop ()
|
|
{
|
|
try
|
|
{
|
|
m_Acceptor.cancel ();
|
|
}
|
|
catch (const std::exception& ex)
|
|
{
|
|
LogPrint (eLogError, "SAM: Runtime exception: ", ex.what ());
|
|
}
|
|
|
|
{
|
|
std::unique_lock<std::mutex> l(m_SessionsMutex);
|
|
for (auto& it: m_Sessions)
|
|
it.second->Close ();
|
|
m_Sessions.clear ();
|
|
}
|
|
StopIOService ();
|
|
}
|
|
|
|
void SAMBridge::Accept ()
|
|
{
|
|
auto newSocket = std::make_shared<SAMSocket>(*this);
|
|
m_Acceptor.async_accept (newSocket->GetSocket(), std::bind (&SAMBridge::HandleAccept, this,
|
|
std::placeholders::_1, newSocket));
|
|
}
|
|
|
|
void SAMBridge::AddSocket(std::shared_ptr<SAMSocket> socket)
|
|
{
|
|
std::unique_lock<std::mutex> lock(m_OpenSocketsMutex);
|
|
m_OpenSockets.push_back(socket);
|
|
}
|
|
|
|
void SAMBridge::RemoveSocket(const std::shared_ptr<SAMSocket> & socket)
|
|
{
|
|
std::unique_lock<std::mutex> lock(m_OpenSocketsMutex);
|
|
m_OpenSockets.remove_if([socket](const std::shared_ptr<SAMSocket> & item) -> bool { return item == socket; });
|
|
}
|
|
|
|
void SAMBridge::HandleAccept(const boost::system::error_code& ecode, std::shared_ptr<SAMSocket> socket)
|
|
{
|
|
if (!ecode)
|
|
{
|
|
boost::system::error_code ec;
|
|
auto ep = socket->GetSocket ().remote_endpoint (ec);
|
|
if (!ec)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: New connection from ", ep);
|
|
AddSocket (socket);
|
|
socket->ReceiveHandshake ();
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Incoming connection error: ", ec.message ());
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Accept error: ", ecode.message ());
|
|
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
Accept ();
|
|
}
|
|
|
|
std::shared_ptr<SAMSession> SAMBridge::CreateSession (const std::string& id, SAMSessionType type,
|
|
const std::string& destination, const std::map<std::string, std::string> * params)
|
|
{
|
|
std::shared_ptr<ClientDestination> localDestination = nullptr;
|
|
if (destination != "")
|
|
{
|
|
i2p::data::PrivateKeys keys;
|
|
if (!keys.FromBase64 (destination)) return nullptr;
|
|
localDestination = m_IsSingleThread ?
|
|
i2p::client::context.CreateNewLocalDestination (GetIOService (), keys, true, params) :
|
|
i2p::client::context.CreateNewLocalDestination (keys, true, params);
|
|
}
|
|
else // transient
|
|
{
|
|
// extract signature type
|
|
i2p::data::SigningKeyType signatureType = i2p::data::SIGNING_KEY_TYPE_DSA_SHA1;
|
|
i2p::data::CryptoKeyType cryptoType = i2p::data::CRYPTO_KEY_TYPE_ELGAMAL;
|
|
if (params)
|
|
{
|
|
auto it = params->find (SAM_PARAM_SIGNATURE_TYPE);
|
|
if (it != params->end ())
|
|
{
|
|
if (!ResolveSignatureType (it->second, signatureType))
|
|
LogPrint (eLogWarning, "SAM: ", SAM_PARAM_SIGNATURE_TYPE, " is invalid ", it->second);
|
|
}
|
|
it = params->find (SAM_PARAM_CRYPTO_TYPE);
|
|
if (it != params->end ())
|
|
{
|
|
try
|
|
{
|
|
cryptoType = std::stoi(it->second);
|
|
}
|
|
catch (const std::exception& ex)
|
|
{
|
|
LogPrint (eLogWarning, "SAM: ", SAM_PARAM_CRYPTO_TYPE, "error: ", ex.what ());
|
|
}
|
|
}
|
|
}
|
|
localDestination = m_IsSingleThread ?
|
|
i2p::client::context.CreateNewLocalDestination (GetIOService (), true, signatureType, cryptoType, params) :
|
|
i2p::client::context.CreateNewLocalDestination (true, signatureType, cryptoType, params);
|
|
}
|
|
if (localDestination)
|
|
{
|
|
localDestination->Acquire ();
|
|
auto session = (type == eSAMSessionTypeMaster) ? std::make_shared<SAMMasterSession>(*this, id, localDestination) :
|
|
std::make_shared<SAMSingleSession>(*this, id, type, localDestination);
|
|
std::unique_lock<std::mutex> l(m_SessionsMutex);
|
|
auto ret = m_Sessions.insert (std::make_pair(id, session));
|
|
if (!ret.second)
|
|
LogPrint (eLogWarning, "SAM: Session ", id, " already exists");
|
|
return ret.first->second;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool SAMBridge::AddSession (std::shared_ptr<SAMSession> session)
|
|
{
|
|
if (!session) return false;
|
|
auto ret = m_Sessions.emplace (session->Name, session);
|
|
return ret.second;
|
|
}
|
|
|
|
void SAMBridge::CloseSession (const std::string& id)
|
|
{
|
|
std::shared_ptr<SAMSession> session;
|
|
{
|
|
std::unique_lock<std::mutex> l(m_SessionsMutex);
|
|
auto it = m_Sessions.find (id);
|
|
if (it != m_Sessions.end ())
|
|
{
|
|
session = it->second;
|
|
m_Sessions.erase (it);
|
|
}
|
|
}
|
|
if (session)
|
|
{
|
|
session->StopLocalDestination ();
|
|
session->Close ();
|
|
if (m_IsSingleThread)
|
|
{
|
|
auto timer = std::make_shared<boost::asio::deadline_timer>(GetService ());
|
|
timer->expires_from_now (boost::posix_time::seconds(5)); // postpone destination clean for 5 seconds
|
|
timer->async_wait ([timer, session](const boost::system::error_code& ecode)
|
|
{
|
|
// session's destructor is called here
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
std::shared_ptr<SAMSession> SAMBridge::FindSession (const std::string& id) const
|
|
{
|
|
std::unique_lock<std::mutex> l(m_SessionsMutex);
|
|
auto it = m_Sessions.find (id);
|
|
if (it != m_Sessions.end ())
|
|
return it->second;
|
|
return nullptr;
|
|
}
|
|
|
|
std::list<std::shared_ptr<SAMSocket> > SAMBridge::ListSockets(const std::string & id) const
|
|
{
|
|
std::list<std::shared_ptr<SAMSocket > > list;
|
|
{
|
|
std::unique_lock<std::mutex> l(m_OpenSocketsMutex);
|
|
for (const auto & itr : m_OpenSockets)
|
|
if (itr->IsSession(id))
|
|
list.push_back(itr);
|
|
}
|
|
return list;
|
|
}
|
|
|
|
void SAMBridge::SendTo (const std::vector<boost::asio::const_buffer>& bufs, const boost::asio::ip::udp::endpoint& ep)
|
|
{
|
|
m_DatagramSocket.send_to (bufs, ep);
|
|
}
|
|
|
|
void SAMBridge::ReceiveDatagram ()
|
|
{
|
|
m_DatagramSocket.async_receive_from (
|
|
boost::asio::buffer (m_DatagramReceiveBuffer, i2p::datagram::MAX_DATAGRAM_SIZE),
|
|
m_SenderEndpoint,
|
|
std::bind (&SAMBridge::HandleReceivedDatagram, this, std::placeholders::_1, std::placeholders::_2));
|
|
}
|
|
|
|
void SAMBridge::HandleReceivedDatagram (const boost::system::error_code& ecode, std::size_t bytes_transferred)
|
|
{
|
|
if (!ecode)
|
|
{
|
|
m_DatagramReceiveBuffer[bytes_transferred] = 0;
|
|
char * eol = strchr ((char *)m_DatagramReceiveBuffer, '\n');
|
|
if(eol)
|
|
{
|
|
*eol = 0; eol++;
|
|
size_t payloadLen = bytes_transferred - ((uint8_t *)eol - m_DatagramReceiveBuffer);
|
|
LogPrint (eLogDebug, "SAM: Datagram received ", m_DatagramReceiveBuffer," size=", payloadLen);
|
|
char * sessionID = strchr ((char *)m_DatagramReceiveBuffer, ' ');
|
|
if (sessionID)
|
|
{
|
|
sessionID++;
|
|
char * destination = strchr (sessionID, ' ');
|
|
if (destination)
|
|
{
|
|
*destination = 0; destination++;
|
|
auto session = FindSession (sessionID);
|
|
if (session)
|
|
{
|
|
auto localDest = session->GetLocalDestination ();
|
|
auto datagramDest = localDest ? localDest->GetDatagramDestination () : nullptr;
|
|
if (datagramDest)
|
|
{
|
|
i2p::data::IdentityEx dest;
|
|
dest.FromBase64 (destination);
|
|
if (session->Type == eSAMSessionTypeDatagram)
|
|
datagramDest->SendDatagramTo ((uint8_t *)eol, payloadLen, dest.GetIdentHash ());
|
|
else if (session->Type == eSAMSessionTypeRaw)
|
|
datagramDest->SendRawDatagramTo ((uint8_t *)eol, payloadLen, dest.GetIdentHash ());
|
|
else
|
|
LogPrint (eLogError, "SAM: Unexpected session type ", (int)session->Type, "for session ", sessionID);
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Datagram destination is not set for session ", sessionID);
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Session ", sessionID, " not found");
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Missing destination key");
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Missing sessionID");
|
|
}
|
|
else
|
|
LogPrint(eLogError, "SAM: Invalid datagram");
|
|
ReceiveDatagram ();
|
|
}
|
|
else
|
|
LogPrint (eLogError, "SAM: Datagram receive error: ", ecode.message ());
|
|
}
|
|
|
|
bool SAMBridge::ResolveSignatureType (const std::string& name, i2p::data::SigningKeyType& type) const
|
|
{
|
|
try
|
|
{
|
|
type = std::stoi (name);
|
|
}
|
|
catch (const std::invalid_argument& ex)
|
|
{
|
|
// name is not numeric, resolving
|
|
auto it = m_SignatureTypes.find (name);
|
|
if (it != m_SignatureTypes.end ())
|
|
type = it->second;
|
|
else
|
|
return false;
|
|
}
|
|
catch (const std::exception& ex)
|
|
{
|
|
return false;
|
|
}
|
|
// name has been resolved
|
|
return true;
|
|
}
|
|
}
|
|
}
|