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1292 lines
38 KiB
C++
1292 lines
38 KiB
C++
/*
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* Copyright (c) 2013-2020, 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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{
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if (Session)
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{
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if (m_IsAccepting && Session->localDestination)
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Session->localDestination->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)
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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_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_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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if (type == eSAMSessionTypeUnknown)
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{
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// unknown style
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SendI2PError("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_VALUE_HOST) != params.end() && params.find(SAM_VALUE_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_VALUE_HOST], e);
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if (e)
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{
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// not an ip address
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SendI2PError("Invalid IP Address in HOST");
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return;
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}
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auto port = std::stoi(params[SAM_VALUE_PORT]);
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if (port == -1)
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{
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SendI2PError("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->localDestination->CreateDatagramDestination ();
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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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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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}
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if (session->localDestination->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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auto session = m_Owner.FindSession(m_ID);
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if(session)
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{
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if (session->localDestination->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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}
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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->localDestination->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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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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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];
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if (silent == SAM_VALUE_TRUE) m_IsSilent = true;
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m_ID = id;
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auto session = m_Owner.FindSession (id);
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if (session)
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{
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if (rem > 0) // handle follow on data
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{
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memmove (m_Buffer, buf + len + 1, rem); // buf is a pointer to m_Buffer's content
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m_BufferOffset = rem;
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}
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else
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m_BufferOffset = 0;
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auto dest = std::make_shared<i2p::data::IdentityEx> ();
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size_t l = dest->FromBase64(destination);
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if (l > 0)
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{
|
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context.GetAddressBook().InsertFullAddress(dest);
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auto leaseSet = session->localDestination->FindLeaseSet(dest->GetIdentHash());
|
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if (leaseSet)
|
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Connect(leaseSet);
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else
|
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{
|
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session->localDestination->RequestDestination(dest->GetIdentHash(),
|
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std::bind(&SAMSocket::HandleConnectLeaseSetRequestComplete,
|
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shared_from_this(), std::placeholders::_1));
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}
|
|
}
|
|
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)
|
|
{
|
|
auto session = m_Owner.FindSession(m_ID);
|
|
if(session)
|
|
{
|
|
m_SocketType = eSAMSocketTypeStream;
|
|
m_Stream = session->localDestination->CreateStream (remote);
|
|
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);
|
|
}
|
|
}
|
|
|
|
void SAMSocket::HandleConnectLeaseSetRequestComplete (std::shared_ptr<i2p::data::LeaseSet> leaseSet)
|
|
{
|
|
if (leaseSet)
|
|
Connect (leaseSet);
|
|
else
|
|
{
|
|
LogPrint (eLogError, "SAM: destination to connect not found");
|
|
SendMessageReply (SAM_STREAM_STATUS_CANT_REACH_PEER, strlen(SAM_STREAM_STATUS_CANT_REACH_PEER), true);
|
|
}
|
|
}
|
|
|
|
void SAMSocket::ProcessStreamAccept (char * buf, size_t len)
|
|
{
|
|
LogPrint (eLogDebug, "SAM: stream accept: ", buf);
|
|
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->localDestination->IsAcceptingStreams ())
|
|
{
|
|
m_IsAccepting = true;
|
|
session->localDestination->AcceptOnce (std::bind (&SAMSocket::HandleI2PAccept, shared_from_this (), std::placeholders::_1));
|
|
}
|
|
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);
|
|
}
|
|
|
|
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->localDestination->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);
|
|
#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->localDestination;
|
|
if (name == "ME")
|
|
SendNamingLookupReply (dest->GetIdentity ());
|
|
else if ((identity = context.GetAddressBook ().GetFullAddress (name)) != nullptr)
|
|
SendNamingLookupReply (identity);
|
|
else if ((addr = context.GetAddressBook ().GetAddress (name)))
|
|
{
|
|
if (addr->IsIdentHash ())
|
|
{
|
|
auto leaseSet = dest->FindLeaseSet (addr->identHash);
|
|
if (leaseSet)
|
|
SendNamingLookupReply (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::SendI2PError(const std::string & msg)
|
|
{
|
|
LogPrint (eLogError, "SAM: i2p error ", msg);
|
|
#ifdef _MSC_VER
|
|
size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_STATUS_I2P_ERROR, msg.c_str());
|
|
#else
|
|
size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_STATUS_I2P_ERROR, msg.c_str());
|
|
#endif
|
|
SendMessageReply (m_Buffer, len, true);
|
|
}
|
|
|
|
void SAMSocket::HandleNamingLookupLeaseSetRequestComplete (std::shared_ptr<i2p::data::LeaseSet> leaseSet, std::string name)
|
|
{
|
|
if (leaseSet)
|
|
{
|
|
context.GetAddressBook ().InsertFullAddress (leaseSet->GetIdentity ());
|
|
SendNamingLookupReply (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 (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, base64.c_str ());
|
|
#else
|
|
size_t l = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY, 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 remaning 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)
|
|
{
|
|
// find more pending acceptors
|
|
for (auto & it: m_Owner.ListSockets (m_ID))
|
|
if (it->m_SocketType == eSAMSocketTypeAcceptor)
|
|
{
|
|
it->m_IsAccepting = true;
|
|
session->localDestination->AcceptOnce (std::bind (&SAMSocket::HandleI2PAccept, it, std::placeholders::_1));
|
|
break;
|
|
}
|
|
}
|
|
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::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
|
|
size_t bsz = base64.size();
|
|
size_t sz = bsz + 1 + len;
|
|
// build datagram body
|
|
uint8_t * data = new uint8_t[sz];
|
|
// Destination
|
|
memcpy(data, base64.c_str(), bsz);
|
|
// linefeed
|
|
data[bsz] = '\n';
|
|
// Payload
|
|
memcpy(data+bsz+1, buf, len);
|
|
// send to remote endpoint
|
|
m_Owner.SendTo(data, sz, ep);
|
|
delete [] data;
|
|
}
|
|
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, std::shared_ptr<ClientDestination> dest):
|
|
m_Bridge(parent),
|
|
localDestination (dest),
|
|
UDPEndpoint(nullptr),
|
|
Name(id), Type (type)
|
|
{
|
|
}
|
|
|
|
SAMSession::~SAMSession ()
|
|
{
|
|
i2p::client::context.DeleteLocalDestination (localDestination);
|
|
}
|
|
|
|
void SAMSession::CloseStreams ()
|
|
{
|
|
for(const auto & itr : m_Bridge.ListSockets(Name))
|
|
{
|
|
itr->Terminate(nullptr);
|
|
}
|
|
}
|
|
|
|
SAMBridge::SAMBridge (const std::string& address, int port, bool singleThread):
|
|
RunnableService ("SAM"), m_IsSingleThread (singleThread),
|
|
m_Acceptor (GetIOService (), boost::asio::ip::tcp::endpoint(boost::asio::ip::address::from_string(address), port)),
|
|
m_DatagramEndpoint (boost::asio::ip::address::from_string(address), port-1), 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->CloseStreams ();
|
|
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::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);
|
|
{
|
|
std::unique_lock<std::mutex> l(m_OpenSocketsMutex);
|
|
m_OpenSockets.push_back(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 = std::make_shared<SAMSession>(*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;
|
|
}
|
|
|
|
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->localDestination->Release ();
|
|
session->localDestination->StopAcceptingStreams ();
|
|
session->CloseStreams ();
|
|
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 uint8_t * buf, size_t len, std::shared_ptr<boost::asio::ip::udp::endpoint> remote)
|
|
{
|
|
if(remote)
|
|
{
|
|
m_DatagramSocket.send_to(boost::asio::buffer(buf, len), *remote);
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
i2p::data::IdentityEx dest;
|
|
dest.FromBase64 (destination);
|
|
if (session->Type == eSAMSessionTypeDatagram)
|
|
session->localDestination->GetDatagramDestination ()->
|
|
SendDatagramTo ((uint8_t *)eol, payloadLen, dest.GetIdentHash ());
|
|
else // raw
|
|
session->localDestination->GetDatagramDestination ()->
|
|
SendRawDatagramTo ((uint8_t *)eol, payloadLen, dest.GetIdentHash ());
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
}
|