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1043 lines
33 KiB
C++
1043 lines
33 KiB
C++
#include <algorithm>
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#include <cassert>
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#include <string>
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#include "Crypto.h"
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#include "Log.h"
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#include "FS.h"
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#include "Timestamp.h"
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#include "NetDb.hpp"
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#include "Destination.h"
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#include "util.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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LeaseSetDestination::LeaseSetDestination (bool isPublic, const std::map<std::string, std::string> * params):
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m_IsRunning (false), m_Thread (nullptr), m_IsPublic (isPublic),
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m_PublishReplyToken (0), m_LastSubmissionTime (0), m_PublishConfirmationTimer (m_Service),
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m_PublishVerificationTimer (m_Service), m_PublishDelayTimer (m_Service), m_CleanupTimer (m_Service)
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{
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int inLen = DEFAULT_INBOUND_TUNNEL_LENGTH;
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int inQty = DEFAULT_INBOUND_TUNNELS_QUANTITY;
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int outLen = DEFAULT_OUTBOUND_TUNNEL_LENGTH;
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int outQty = DEFAULT_OUTBOUND_TUNNELS_QUANTITY;
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int numTags = DEFAULT_TAGS_TO_SEND;
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std::shared_ptr<std::vector<i2p::data::IdentHash> > explicitPeers;
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try
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{
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if (params)
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{
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auto it = params->find (I2CP_PARAM_INBOUND_TUNNEL_LENGTH);
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if (it != params->end ())
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inLen = std::stoi(it->second);
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it = params->find (I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH);
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if (it != params->end ())
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outLen = std::stoi(it->second);
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it = params->find (I2CP_PARAM_INBOUND_TUNNELS_QUANTITY);
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if (it != params->end ())
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inQty = std::stoi(it->second);
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it = params->find (I2CP_PARAM_OUTBOUND_TUNNELS_QUANTITY);
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if (it != params->end ())
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outQty = std::stoi(it->second);
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it = params->find (I2CP_PARAM_TAGS_TO_SEND);
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if (it != params->end ())
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numTags = std::stoi(it->second);
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LogPrint (eLogInfo, "Destination: parameters for tunnel set to: ", inQty, " inbound (", inLen, " hops), ", outQty, " outbound (", outLen, " hops), ", numTags, " tags");
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it = params->find (I2CP_PARAM_EXPLICIT_PEERS);
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if (it != params->end ())
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{
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explicitPeers = std::make_shared<std::vector<i2p::data::IdentHash> >();
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std::stringstream ss(it->second);
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std::string b64;
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while (std::getline (ss, b64, ','))
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{
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i2p::data::IdentHash ident;
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ident.FromBase64 (b64);
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explicitPeers->push_back (ident);
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LogPrint (eLogInfo, "Destination: Added to explicit peers list: ", b64);
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}
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}
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it = params->find (I2CP_PARAM_INBOUND_NICKNAME);
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if (it != params->end ()) m_Nickname = it->second;
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else // try outbound
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{
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it = params->find (I2CP_PARAM_OUTBOUND_NICKNAME);
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if (it != params->end ()) m_Nickname = it->second;
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// otherwise we set default nickname in Start when we know local address
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}
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}
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}
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catch (std::exception & ex)
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{
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LogPrint(eLogError, "Destination: unable to parse parameters for destination: ", ex.what());
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}
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SetNumTags (numTags);
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m_Pool = i2p::tunnel::tunnels.CreateTunnelPool (inLen, outLen, inQty, outQty);
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if (explicitPeers)
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m_Pool->SetExplicitPeers (explicitPeers);
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if(params)
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{
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auto itr = params->find(I2CP_PARAM_MAX_TUNNEL_LATENCY);
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if (itr != params->end()) {
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auto maxlatency = std::stoi(itr->second);
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itr = params->find(I2CP_PARAM_MIN_TUNNEL_LATENCY);
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if (itr != params->end()) {
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auto minlatency = std::stoi(itr->second);
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if ( minlatency > 0 && maxlatency > 0 ) {
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// set tunnel pool latency
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LogPrint(eLogInfo, "Destination: requiring tunnel latency [", minlatency, "ms, ", maxlatency, "ms]");
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m_Pool->RequireLatency(minlatency, maxlatency);
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}
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}
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}
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}
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}
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LeaseSetDestination::~LeaseSetDestination ()
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{
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if (m_IsRunning)
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Stop ();
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if (m_Pool)
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i2p::tunnel::tunnels.DeleteTunnelPool (m_Pool);
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for (auto& it: m_LeaseSetRequests)
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it.second->Complete (nullptr);
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}
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void LeaseSetDestination::Run ()
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{
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while (m_IsRunning)
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{
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try
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{
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m_Service.run ();
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}
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catch (std::exception& ex)
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{
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LogPrint (eLogError, "Destination: runtime exception: ", ex.what ());
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}
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}
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}
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bool LeaseSetDestination::Start ()
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{
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if (!m_IsRunning)
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{
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if (m_Nickname.empty ())
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m_Nickname = i2p::data::GetIdentHashAbbreviation (GetIdentHash ()); // set default nickname
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LoadTags ();
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m_IsRunning = true;
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m_Pool->SetLocalDestination (shared_from_this ());
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m_Pool->SetActive (true);
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m_CleanupTimer.expires_from_now (boost::posix_time::minutes (DESTINATION_CLEANUP_TIMEOUT));
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m_CleanupTimer.async_wait (std::bind (&LeaseSetDestination::HandleCleanupTimer,
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shared_from_this (), std::placeholders::_1));
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m_Thread = new std::thread (std::bind (&LeaseSetDestination::Run, shared_from_this ()));
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return true;
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}
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else
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return false;
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}
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bool LeaseSetDestination::Stop ()
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{
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if (m_IsRunning)
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{
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m_CleanupTimer.cancel ();
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m_PublishConfirmationTimer.cancel ();
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m_PublishVerificationTimer.cancel ();
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m_IsRunning = false;
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if (m_Pool)
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{
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m_Pool->SetLocalDestination (nullptr);
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i2p::tunnel::tunnels.StopTunnelPool (m_Pool);
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}
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m_Service.stop ();
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if (m_Thread)
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{
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m_Thread->join ();
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delete m_Thread;
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m_Thread = 0;
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}
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SaveTags ();
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CleanUp (); // GarlicDestination
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return true;
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}
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else
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return false;
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}
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bool LeaseSetDestination::Reconfigure(std::map<std::string, std::string> params)
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{
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auto itr = params.find("i2cp.dontPublishLeaseSet");
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if (itr != params.end())
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{
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m_IsPublic = itr->second != "true";
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}
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int inLen, outLen, inQuant, outQuant, numTags, minLatency, maxLatency;
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std::map<std::string, int&> intOpts = {
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{I2CP_PARAM_INBOUND_TUNNEL_LENGTH, inLen},
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{I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH, outLen},
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{I2CP_PARAM_INBOUND_TUNNELS_QUANTITY, inQuant},
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{I2CP_PARAM_OUTBOUND_TUNNELS_QUANTITY, outQuant},
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{I2CP_PARAM_TAGS_TO_SEND, numTags},
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{I2CP_PARAM_MIN_TUNNEL_LATENCY, minLatency},
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{I2CP_PARAM_MAX_TUNNEL_LATENCY, maxLatency}
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};
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auto pool = GetTunnelPool();
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inLen = pool->GetNumInboundHops();
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outLen = pool->GetNumOutboundHops();
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inQuant = pool->GetNumInboundTunnels();
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outQuant = pool->GetNumOutboundTunnels();
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minLatency = 0;
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maxLatency = 0;
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for (auto & opt : intOpts)
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{
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itr = params.find(opt.first);
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if(itr != params.end())
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{
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opt.second = std::stoi(itr->second);
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}
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}
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pool->RequireLatency(minLatency, maxLatency);
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return pool->Reconfigure(inLen, outLen, inQuant, outQuant);
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}
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std::shared_ptr<const i2p::data::LeaseSet> LeaseSetDestination::FindLeaseSet (const i2p::data::IdentHash& ident)
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{
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std::shared_ptr<i2p::data::LeaseSet> remoteLS;
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{
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std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
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auto it = m_RemoteLeaseSets.find (ident);
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if (it != m_RemoteLeaseSets.end ())
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remoteLS = it->second;
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}
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if (remoteLS)
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{
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if (!remoteLS->IsExpired ())
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{
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if (remoteLS->ExpiresSoon())
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{
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LogPrint(eLogDebug, "Destination: Lease Set expires soon, updating before expire");
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// update now before expiration for smooth handover
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auto s = shared_from_this ();
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RequestDestination(ident, [s, ident] (std::shared_ptr<i2p::data::LeaseSet> ls) {
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if(ls && !ls->IsExpired())
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{
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ls->PopulateLeases();
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{
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std::lock_guard<std::mutex> _lock(s->m_RemoteLeaseSetsMutex);
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s->m_RemoteLeaseSets[ident] = ls;
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}
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}
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});
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}
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return remoteLS;
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}
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else
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{
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LogPrint (eLogWarning, "Destination: remote LeaseSet expired");
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std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
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m_RemoteLeaseSets.erase (ident);
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return nullptr;
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}
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}
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else
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{
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auto ls = i2p::data::netdb.FindLeaseSet (ident);
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if (ls && !ls->IsExpired ())
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{
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ls->PopulateLeases (); // since we don't store them in netdb
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std::lock_guard<std::mutex> _lock(m_RemoteLeaseSetsMutex);
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m_RemoteLeaseSets[ident] = ls;
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return ls;
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}
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}
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return nullptr;
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}
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std::shared_ptr<const i2p::data::LocalLeaseSet> LeaseSetDestination::GetLeaseSet ()
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{
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if (!m_Pool) return nullptr;
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if (!m_LeaseSet)
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UpdateLeaseSet ();
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std::lock_guard<std::mutex> l(m_LeaseSetMutex);
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return m_LeaseSet;
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}
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void LeaseSetDestination::SetLeaseSet (i2p::data::LocalLeaseSet * newLeaseSet)
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{
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{
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std::lock_guard<std::mutex> l(m_LeaseSetMutex);
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m_LeaseSet.reset (newLeaseSet);
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}
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i2p::garlic::GarlicDestination::SetLeaseSetUpdated ();
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if (m_IsPublic)
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{
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auto s = shared_from_this ();
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m_Service.post ([s](void)
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{
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s->m_PublishVerificationTimer.cancel ();
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s->Publish ();
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});
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}
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}
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void LeaseSetDestination::UpdateLeaseSet ()
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{
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int numTunnels = m_Pool->GetNumInboundTunnels () + 2; // 2 backup tunnels
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if (numTunnels > i2p::data::MAX_NUM_LEASES) numTunnels = i2p::data::MAX_NUM_LEASES; // 16 tunnels maximum
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CreateNewLeaseSet (m_Pool->GetInboundTunnels (numTunnels));
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}
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bool LeaseSetDestination::SubmitSessionKey (const uint8_t * key, const uint8_t * tag)
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{
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struct
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{
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uint8_t k[32], t[32];
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} data;
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memcpy (data.k, key, 32);
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memcpy (data.t, tag, 32);
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auto s = shared_from_this ();
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m_Service.post ([s,data](void)
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{
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s->AddSessionKey (data.k, data.t);
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});
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return true;
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}
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void LeaseSetDestination::ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg)
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{
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m_Service.post (std::bind (&LeaseSetDestination::HandleGarlicMessage, shared_from_this (), msg));
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}
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void LeaseSetDestination::ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg)
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{
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m_Service.post (std::bind (&LeaseSetDestination::HandleDeliveryStatusMessage, shared_from_this (), msg));
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}
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void LeaseSetDestination::HandleI2NPMessage (const uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from)
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{
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uint8_t typeID = buf[I2NP_HEADER_TYPEID_OFFSET];
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switch (typeID)
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{
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case eI2NPData:
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HandleDataMessage (buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE);
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break;
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case eI2NPDeliveryStatus:
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// we assume tunnel tests non-encrypted
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HandleDeliveryStatusMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len), from));
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break;
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case eI2NPDatabaseStore:
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HandleDatabaseStoreMessage (buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE);
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break;
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case eI2NPDatabaseSearchReply:
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HandleDatabaseSearchReplyMessage (buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE);
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break;
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default:
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i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len), from));
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}
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}
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void LeaseSetDestination::HandleDatabaseStoreMessage (const uint8_t * buf, size_t len)
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{
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uint32_t replyToken = bufbe32toh (buf + DATABASE_STORE_REPLY_TOKEN_OFFSET);
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size_t offset = DATABASE_STORE_HEADER_SIZE;
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if (replyToken)
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{
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LogPrint (eLogInfo, "Destination: Reply token is ignored for DatabaseStore");
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offset += 36;
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}
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i2p::data::IdentHash key (buf + DATABASE_STORE_KEY_OFFSET);
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std::shared_ptr<i2p::data::LeaseSet> leaseSet;
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if (buf[DATABASE_STORE_TYPE_OFFSET] == 1) // LeaseSet
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{
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LogPrint (eLogDebug, "Destination: Remote LeaseSet");
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std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
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auto it = m_RemoteLeaseSets.find (key);
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if (it != m_RemoteLeaseSets.end ())
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{
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leaseSet = it->second;
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if (leaseSet->IsNewer (buf + offset, len - offset))
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{
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leaseSet->Update (buf + offset, len - offset);
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if (leaseSet->IsValid () && leaseSet->GetIdentHash () == key)
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LogPrint (eLogDebug, "Destination: Remote LeaseSet updated");
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else
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{
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LogPrint (eLogDebug, "Destination: Remote LeaseSet update failed");
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m_RemoteLeaseSets.erase (it);
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leaseSet = nullptr;
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}
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}
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else
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LogPrint (eLogDebug, "Destination: Remote LeaseSet is older. Not updated");
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}
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else
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{
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leaseSet = std::make_shared<i2p::data::LeaseSet> (buf + offset, len - offset);
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if (leaseSet->IsValid () && leaseSet->GetIdentHash () == key)
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{
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if (leaseSet->GetIdentHash () != GetIdentHash ())
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{
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LogPrint (eLogDebug, "Destination: New remote LeaseSet added");
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m_RemoteLeaseSets[key] = leaseSet;
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}
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else
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LogPrint (eLogDebug, "Destination: Own remote LeaseSet dropped");
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}
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else
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{
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LogPrint (eLogError, "Destination: New remote LeaseSet failed");
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leaseSet = nullptr;
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}
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}
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}
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else
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LogPrint (eLogError, "Destination: Unexpected client's DatabaseStore type ", buf[DATABASE_STORE_TYPE_OFFSET], ", dropped");
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auto it1 = m_LeaseSetRequests.find (key);
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if (it1 != m_LeaseSetRequests.end ())
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{
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it1->second->requestTimeoutTimer.cancel ();
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if (it1->second) it1->second->Complete (leaseSet);
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m_LeaseSetRequests.erase (it1);
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}
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}
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void LeaseSetDestination::HandleDatabaseSearchReplyMessage (const uint8_t * buf, size_t len)
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{
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i2p::data::IdentHash key (buf);
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int num = buf[32]; // num
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LogPrint (eLogDebug, "Destination: DatabaseSearchReply for ", key.ToBase64 (), " num=", num);
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auto it = m_LeaseSetRequests.find (key);
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if (it != m_LeaseSetRequests.end ())
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{
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auto request = it->second;
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bool found = false;
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if (request->excluded.size () < MAX_NUM_FLOODFILLS_PER_REQUEST)
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{
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for (int i = 0; i < num; i++)
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{
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i2p::data::IdentHash peerHash (buf + 33 + i*32);
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if (!request->excluded.count (peerHash) && !i2p::data::netdb.FindRouter (peerHash))
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{
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LogPrint (eLogInfo, "Destination: Found new floodfill, request it"); // TODO: recheck this message
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i2p::data::netdb.RequestDestination (peerHash);
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}
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}
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auto floodfill = i2p::data::netdb.GetClosestFloodfill (key, request->excluded);
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if (floodfill)
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{
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LogPrint (eLogInfo, "Destination: Requesting ", key.ToBase64 (), " at ", floodfill->GetIdentHash ().ToBase64 ());
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if (SendLeaseSetRequest (key, floodfill, request))
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found = true;
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}
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}
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if (!found)
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{
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LogPrint (eLogInfo, "Destination: ", key.ToBase64 (), " was not found on ", MAX_NUM_FLOODFILLS_PER_REQUEST, " floodfills");
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request->Complete (nullptr);
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m_LeaseSetRequests.erase (key);
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}
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}
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else
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LogPrint (eLogWarning, "Destination: Request for ", key.ToBase64 (), " not found");
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}
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void LeaseSetDestination::HandleDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg)
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{
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uint32_t msgID = bufbe32toh (msg->GetPayload () + DELIVERY_STATUS_MSGID_OFFSET);
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if (msgID == m_PublishReplyToken)
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{
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LogPrint (eLogDebug, "Destination: Publishing LeaseSet confirmed for ", GetIdentHash().ToBase32());
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m_ExcludedFloodfills.clear ();
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m_PublishReplyToken = 0;
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|
// schedule verification
|
|
m_PublishVerificationTimer.expires_from_now (boost::posix_time::seconds(PUBLISH_VERIFICATION_TIMEOUT));
|
|
m_PublishVerificationTimer.async_wait (std::bind (&LeaseSetDestination::HandlePublishVerificationTimer,
|
|
shared_from_this (), std::placeholders::_1));
|
|
}
|
|
else
|
|
i2p::garlic::GarlicDestination::HandleDeliveryStatusMessage (msg);
|
|
}
|
|
|
|
void LeaseSetDestination::SetLeaseSetUpdated ()
|
|
{
|
|
UpdateLeaseSet ();
|
|
}
|
|
|
|
void LeaseSetDestination::Publish ()
|
|
{
|
|
if (!m_LeaseSet || !m_Pool)
|
|
{
|
|
LogPrint (eLogError, "Destination: Can't publish non-existing LeaseSet");
|
|
return;
|
|
}
|
|
if (m_PublishReplyToken)
|
|
{
|
|
LogPrint (eLogDebug, "Destination: Publishing LeaseSet is pending");
|
|
return;
|
|
}
|
|
auto ts = i2p::util::GetSecondsSinceEpoch ();
|
|
if (ts < m_LastSubmissionTime + PUBLISH_MIN_INTERVAL)
|
|
{
|
|
LogPrint (eLogDebug, "Destination: Publishing LeaseSet is too fast. Wait for ", PUBLISH_MIN_INTERVAL, " seconds");
|
|
m_PublishDelayTimer.cancel ();
|
|
m_PublishDelayTimer.expires_from_now (boost::posix_time::seconds(PUBLISH_MIN_INTERVAL));
|
|
m_PublishDelayTimer.async_wait (std::bind (&LeaseSetDestination::HandlePublishDelayTimer,
|
|
shared_from_this (), std::placeholders::_1));
|
|
return;
|
|
}
|
|
auto outbound = m_Pool->GetNextOutboundTunnel ();
|
|
if (!outbound)
|
|
{
|
|
LogPrint (eLogError, "Destination: Can't publish LeaseSet. No outbound tunnels");
|
|
return;
|
|
}
|
|
auto inbound = m_Pool->GetNextInboundTunnel ();
|
|
if (!inbound)
|
|
{
|
|
LogPrint (eLogError, "Destination: Can't publish LeaseSet. No inbound tunnels");
|
|
return;
|
|
}
|
|
auto floodfill = i2p::data::netdb.GetClosestFloodfill (m_LeaseSet->GetIdentHash (), m_ExcludedFloodfills);
|
|
if (!floodfill)
|
|
{
|
|
LogPrint (eLogError, "Destination: Can't publish LeaseSet, no more floodfills found");
|
|
m_ExcludedFloodfills.clear ();
|
|
return;
|
|
}
|
|
m_ExcludedFloodfills.insert (floodfill->GetIdentHash ());
|
|
LogPrint (eLogDebug, "Destination: Publish LeaseSet of ", GetIdentHash ().ToBase32 ());
|
|
RAND_bytes ((uint8_t *)&m_PublishReplyToken, 4);
|
|
auto msg = WrapMessage (floodfill, i2p::CreateDatabaseStoreMsg (m_LeaseSet, m_PublishReplyToken, inbound));
|
|
m_PublishConfirmationTimer.expires_from_now (boost::posix_time::seconds(PUBLISH_CONFIRMATION_TIMEOUT));
|
|
m_PublishConfirmationTimer.async_wait (std::bind (&LeaseSetDestination::HandlePublishConfirmationTimer,
|
|
shared_from_this (), std::placeholders::_1));
|
|
outbound->SendTunnelDataMsg (floodfill->GetIdentHash (), 0, msg);
|
|
m_LastSubmissionTime = ts;
|
|
}
|
|
|
|
void LeaseSetDestination::HandlePublishConfirmationTimer (const boost::system::error_code& ecode)
|
|
{
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
{
|
|
if (m_PublishReplyToken)
|
|
{
|
|
m_PublishReplyToken = 0;
|
|
if (GetIdentity ()->GetCryptoKeyType () == i2p::data::CRYPTO_KEY_TYPE_ELGAMAL)
|
|
{
|
|
LogPrint (eLogWarning, "Destination: Publish confirmation was not received in ", PUBLISH_CONFIRMATION_TIMEOUT, " seconds, will try again");
|
|
Publish ();
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogWarning, "Destination: Publish confirmation was not received in ", PUBLISH_CONFIRMATION_TIMEOUT, " seconds from Java floodfill for crypto type ", (int)GetIdentity ()->GetCryptoKeyType ());
|
|
// Java floodfill never sends confirmantion back for unknown crypto type
|
|
// assume it successive and try to verify
|
|
m_PublishVerificationTimer.expires_from_now (boost::posix_time::seconds(PUBLISH_VERIFICATION_TIMEOUT));
|
|
m_PublishVerificationTimer.async_wait (std::bind (&LeaseSetDestination::HandlePublishVerificationTimer,
|
|
shared_from_this (), std::placeholders::_1));
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void LeaseSetDestination::HandlePublishVerificationTimer (const boost::system::error_code& ecode)
|
|
{
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
{
|
|
auto s = shared_from_this ();
|
|
RequestLeaseSet (GetIdentHash (),
|
|
// "this" added due to bug in gcc 4.7-4.8
|
|
[s,this](std::shared_ptr<i2p::data::LeaseSet> leaseSet)
|
|
{
|
|
if (leaseSet)
|
|
{
|
|
if (s->m_LeaseSet && *s->m_LeaseSet == *leaseSet)
|
|
{
|
|
// we got latest LeasetSet
|
|
LogPrint (eLogDebug, "Destination: published LeaseSet verified for ", GetIdentHash().ToBase32());
|
|
s->m_PublishVerificationTimer.expires_from_now (boost::posix_time::seconds(PUBLISH_REGULAR_VERIFICATION_INTERNAL));
|
|
s->m_PublishVerificationTimer.async_wait (std::bind (&LeaseSetDestination::HandlePublishVerificationTimer, s, std::placeholders::_1));
|
|
return;
|
|
}
|
|
else
|
|
LogPrint (eLogDebug, "Destination: LeaseSet is different than just published for ", GetIdentHash().ToBase32());
|
|
}
|
|
else
|
|
LogPrint (eLogWarning, "Destination: couldn't find published LeaseSet for ", GetIdentHash().ToBase32());
|
|
// we have to publish again
|
|
s->Publish ();
|
|
});
|
|
}
|
|
}
|
|
|
|
void LeaseSetDestination::HandlePublishDelayTimer (const boost::system::error_code& ecode)
|
|
{
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
Publish ();
|
|
}
|
|
|
|
bool LeaseSetDestination::RequestDestination (const i2p::data::IdentHash& dest, RequestComplete requestComplete)
|
|
{
|
|
if (!m_Pool || !IsReady ())
|
|
{
|
|
if (requestComplete)
|
|
m_Service.post ([requestComplete](void){requestComplete (nullptr);});
|
|
return false;
|
|
}
|
|
m_Service.post (std::bind (&LeaseSetDestination::RequestLeaseSet, shared_from_this (), dest, requestComplete));
|
|
return true;
|
|
}
|
|
|
|
void LeaseSetDestination::CancelDestinationRequest (const i2p::data::IdentHash& dest, bool notify)
|
|
{
|
|
auto s = shared_from_this ();
|
|
m_Service.post ([dest, notify, s](void)
|
|
{
|
|
auto it = s->m_LeaseSetRequests.find (dest);
|
|
if (it != s->m_LeaseSetRequests.end ())
|
|
{
|
|
auto requestComplete = it->second;
|
|
s->m_LeaseSetRequests.erase (it);
|
|
if (notify && requestComplete) requestComplete->Complete (nullptr);
|
|
}
|
|
});
|
|
}
|
|
|
|
void LeaseSetDestination::RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete)
|
|
{
|
|
std::set<i2p::data::IdentHash> excluded;
|
|
auto floodfill = i2p::data::netdb.GetClosestFloodfill (dest, excluded);
|
|
if (floodfill)
|
|
{
|
|
auto request = std::make_shared<LeaseSetRequest> (m_Service);
|
|
if (requestComplete)
|
|
request->requestComplete.push_back (requestComplete);
|
|
auto ts = i2p::util::GetSecondsSinceEpoch ();
|
|
auto ret = m_LeaseSetRequests.insert (std::pair<i2p::data::IdentHash, std::shared_ptr<LeaseSetRequest> >(dest,request));
|
|
if (ret.second) // inserted
|
|
{
|
|
request->requestTime = ts;
|
|
if (!SendLeaseSetRequest (dest, floodfill, request))
|
|
{
|
|
// request failed
|
|
m_LeaseSetRequests.erase (ret.first);
|
|
if (requestComplete) requestComplete (nullptr);
|
|
}
|
|
}
|
|
else // duplicate
|
|
{
|
|
LogPrint (eLogInfo, "Destination: Request of LeaseSet ", dest.ToBase64 (), " is pending already");
|
|
if (ts > ret.first->second->requestTime + MAX_LEASESET_REQUEST_TIMEOUT)
|
|
{
|
|
// something went wrong
|
|
m_LeaseSetRequests.erase (ret.first);
|
|
if (requestComplete) requestComplete (nullptr);
|
|
}
|
|
else if (requestComplete)
|
|
ret.first->second->requestComplete.push_back (requestComplete);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogError, "Destination: Can't request LeaseSet, no floodfills found");
|
|
if (requestComplete) requestComplete (nullptr);
|
|
}
|
|
}
|
|
|
|
bool LeaseSetDestination::SendLeaseSetRequest (const i2p::data::IdentHash& dest,
|
|
std::shared_ptr<const i2p::data::RouterInfo> nextFloodfill, std::shared_ptr<LeaseSetRequest> request)
|
|
{
|
|
if (!request->replyTunnel || !request->replyTunnel->IsEstablished ())
|
|
request->replyTunnel = m_Pool->GetNextInboundTunnel ();
|
|
if (!request->replyTunnel) LogPrint (eLogError, "Destination: Can't send LeaseSet request, no inbound tunnels found");
|
|
if (!request->outboundTunnel || !request->outboundTunnel->IsEstablished ())
|
|
request->outboundTunnel = m_Pool->GetNextOutboundTunnel ();
|
|
if (!request->outboundTunnel) LogPrint (eLogError, "Destination: Can't send LeaseSet request, no outbound tunnels found");
|
|
|
|
if (request->replyTunnel && request->outboundTunnel)
|
|
{
|
|
request->excluded.insert (nextFloodfill->GetIdentHash ());
|
|
request->requestTimeoutTimer.cancel ();
|
|
|
|
uint8_t replyKey[32], replyTag[32];
|
|
RAND_bytes (replyKey, 32); // random session key
|
|
RAND_bytes (replyTag, 32); // random session tag
|
|
AddSessionKey (replyKey, replyTag);
|
|
|
|
auto msg = WrapMessage (nextFloodfill,
|
|
CreateLeaseSetDatabaseLookupMsg (dest, request->excluded,
|
|
request->replyTunnel, replyKey, replyTag));
|
|
request->outboundTunnel->SendTunnelDataMsg (
|
|
{
|
|
i2p::tunnel::TunnelMessageBlock
|
|
{
|
|
i2p::tunnel::eDeliveryTypeRouter,
|
|
nextFloodfill->GetIdentHash (), 0, msg
|
|
}
|
|
});
|
|
request->requestTimeoutTimer.expires_from_now (boost::posix_time::seconds(LEASESET_REQUEST_TIMEOUT));
|
|
request->requestTimeoutTimer.async_wait (std::bind (&LeaseSetDestination::HandleRequestTimoutTimer,
|
|
shared_from_this (), std::placeholders::_1, dest));
|
|
}
|
|
else
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
void LeaseSetDestination::HandleRequestTimoutTimer (const boost::system::error_code& ecode, const i2p::data::IdentHash& dest)
|
|
{
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
{
|
|
auto it = m_LeaseSetRequests.find (dest);
|
|
if (it != m_LeaseSetRequests.end ())
|
|
{
|
|
bool done = false;
|
|
uint64_t ts = i2p::util::GetSecondsSinceEpoch ();
|
|
if (ts < it->second->requestTime + MAX_LEASESET_REQUEST_TIMEOUT)
|
|
{
|
|
auto floodfill = i2p::data::netdb.GetClosestFloodfill (dest, it->second->excluded);
|
|
if (floodfill)
|
|
{
|
|
// reset tunnels, because one them might fail
|
|
it->second->outboundTunnel = nullptr;
|
|
it->second->replyTunnel = nullptr;
|
|
done = !SendLeaseSetRequest (dest, floodfill, it->second);
|
|
}
|
|
else
|
|
done = true;
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogWarning, "Destination: ", dest.ToBase64 (), " was not found within ", MAX_LEASESET_REQUEST_TIMEOUT, " seconds");
|
|
done = true;
|
|
}
|
|
|
|
if (done)
|
|
{
|
|
auto requestComplete = it->second;
|
|
m_LeaseSetRequests.erase (it);
|
|
if (requestComplete) requestComplete->Complete (nullptr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void LeaseSetDestination::HandleCleanupTimer (const boost::system::error_code& ecode)
|
|
{
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
{
|
|
CleanupExpiredTags ();
|
|
CleanupRemoteLeaseSets ();
|
|
CleanupDestination ();
|
|
m_CleanupTimer.expires_from_now (boost::posix_time::minutes (DESTINATION_CLEANUP_TIMEOUT));
|
|
m_CleanupTimer.async_wait (std::bind (&LeaseSetDestination::HandleCleanupTimer,
|
|
shared_from_this (), std::placeholders::_1));
|
|
}
|
|
}
|
|
|
|
void LeaseSetDestination::CleanupRemoteLeaseSets ()
|
|
{
|
|
auto ts = i2p::util::GetMillisecondsSinceEpoch ();
|
|
std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
|
|
for (auto it = m_RemoteLeaseSets.begin (); it != m_RemoteLeaseSets.end ();)
|
|
{
|
|
if (it->second->IsEmpty () || ts > it->second->GetExpirationTime ()) // leaseset expired
|
|
{
|
|
LogPrint (eLogWarning, "Destination: Remote LeaseSet ", it->second->GetIdentHash ().ToBase64 (), " expired");
|
|
it = m_RemoteLeaseSets.erase (it);
|
|
}
|
|
else
|
|
++it;
|
|
}
|
|
}
|
|
|
|
ClientDestination::ClientDestination (const i2p::data::PrivateKeys& keys, bool isPublic, const std::map<std::string, std::string> * params):
|
|
LeaseSetDestination (isPublic, params), m_Keys (keys), m_StreamingAckDelay (DEFAULT_INITIAL_ACK_DELAY),
|
|
m_DatagramDestination (nullptr), m_RefCounter (0),
|
|
m_ReadyChecker(GetService())
|
|
{
|
|
if (isPublic)
|
|
PersistTemporaryKeys ();
|
|
else
|
|
i2p::data::PrivateKeys::GenerateCryptoKeyPair(GetIdentity ()->GetCryptoKeyType (),
|
|
m_EncryptionPrivateKey, m_EncryptionPublicKey);
|
|
m_Decryptor = m_Keys.CreateDecryptor (m_EncryptionPrivateKey);
|
|
if (isPublic)
|
|
LogPrint (eLogInfo, "Destination: Local address ", GetIdentHash().ToBase32 (), " created");
|
|
|
|
// extract streaming params
|
|
if (params)
|
|
{
|
|
auto it = params->find (I2CP_PARAM_STREAMING_INITIAL_ACK_DELAY);
|
|
if (it != params->end ())
|
|
m_StreamingAckDelay = std::stoi(it->second);
|
|
}
|
|
}
|
|
|
|
ClientDestination::~ClientDestination ()
|
|
{
|
|
}
|
|
|
|
bool ClientDestination::Start ()
|
|
{
|
|
if (LeaseSetDestination::Start ())
|
|
{
|
|
m_StreamingDestination = std::make_shared<i2p::stream::StreamingDestination> (GetSharedFromThis ()); // TODO:
|
|
m_StreamingDestination->Start ();
|
|
for (auto& it: m_StreamingDestinationsByPorts)
|
|
it.second->Start ();
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
bool ClientDestination::Stop ()
|
|
{
|
|
if (LeaseSetDestination::Stop ())
|
|
{
|
|
m_ReadyChecker.cancel();
|
|
m_StreamingDestination->Stop ();
|
|
//m_StreamingDestination->SetOwner (nullptr);
|
|
m_StreamingDestination = nullptr;
|
|
for (auto& it: m_StreamingDestinationsByPorts)
|
|
{
|
|
it.second->Stop ();
|
|
//it.second->SetOwner (nullptr);
|
|
}
|
|
m_StreamingDestinationsByPorts.clear ();
|
|
if (m_DatagramDestination)
|
|
{
|
|
delete m_DatagramDestination;
|
|
m_DatagramDestination = nullptr;
|
|
}
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
#ifdef I2LUA
|
|
void ClientDestination::Ready(ReadyPromise & p)
|
|
{
|
|
ScheduleCheckForReady(&p);
|
|
}
|
|
|
|
void ClientDestination::ScheduleCheckForReady(ReadyPromise * p)
|
|
{
|
|
// tick every 100ms
|
|
m_ReadyChecker.expires_from_now(boost::posix_time::milliseconds(100));
|
|
m_ReadyChecker.async_wait([&, p] (const boost::system::error_code & ecode) {
|
|
HandleCheckForReady(ecode, p);
|
|
});
|
|
}
|
|
|
|
void ClientDestination::HandleCheckForReady(const boost::system::error_code & ecode, ReadyPromise * p)
|
|
{
|
|
if(ecode) // error happened
|
|
p->set_value(nullptr);
|
|
else if(IsReady()) // we are ready
|
|
p->set_value(std::shared_ptr<ClientDestination>(this));
|
|
else // we are not ready
|
|
ScheduleCheckForReady(p);
|
|
}
|
|
#endif
|
|
|
|
void ClientDestination::HandleDataMessage (const uint8_t * buf, size_t len)
|
|
{
|
|
uint32_t length = bufbe32toh (buf);
|
|
if(length > len - 4)
|
|
{
|
|
LogPrint(eLogError, "Destination: Data message length ", length, " exceeds buffer length ", len);
|
|
return;
|
|
}
|
|
buf += 4;
|
|
// we assume I2CP payload
|
|
uint16_t fromPort = bufbe16toh (buf + 4), // source
|
|
toPort = bufbe16toh (buf + 6); // destination
|
|
switch (buf[9])
|
|
{
|
|
case PROTOCOL_TYPE_STREAMING:
|
|
{
|
|
// streaming protocol
|
|
auto dest = GetStreamingDestination (toPort);
|
|
if (dest)
|
|
dest->HandleDataMessagePayload (buf, length);
|
|
else
|
|
LogPrint (eLogError, "Destination: Missing streaming destination");
|
|
}
|
|
break;
|
|
case PROTOCOL_TYPE_DATAGRAM:
|
|
// datagram protocol
|
|
if (m_DatagramDestination)
|
|
m_DatagramDestination->HandleDataMessagePayload (fromPort, toPort, buf, length);
|
|
else
|
|
LogPrint (eLogError, "Destination: Missing datagram destination");
|
|
break;
|
|
default:
|
|
LogPrint (eLogError, "Destination: Data: unexpected protocol ", buf[9]);
|
|
}
|
|
}
|
|
|
|
void ClientDestination::CreateStream (StreamRequestComplete streamRequestComplete, const i2p::data::IdentHash& dest, int port)
|
|
{
|
|
if (!streamRequestComplete)
|
|
{
|
|
LogPrint (eLogError, "Destination: request callback is not specified in CreateStream");
|
|
return;
|
|
}
|
|
auto leaseSet = FindLeaseSet (dest);
|
|
if (leaseSet)
|
|
streamRequestComplete(CreateStream (leaseSet, port));
|
|
else
|
|
{
|
|
auto s = GetSharedFromThis ();
|
|
RequestDestination (dest,
|
|
[s, streamRequestComplete, port](std::shared_ptr<i2p::data::LeaseSet> ls)
|
|
{
|
|
if (ls)
|
|
streamRequestComplete(s->CreateStream (ls, port));
|
|
else
|
|
streamRequestComplete (nullptr);
|
|
});
|
|
}
|
|
}
|
|
|
|
std::shared_ptr<i2p::stream::Stream> ClientDestination::CreateStream (std::shared_ptr<const i2p::data::LeaseSet> remote, int port)
|
|
{
|
|
if (m_StreamingDestination)
|
|
return m_StreamingDestination->CreateNewOutgoingStream (remote, port);
|
|
else
|
|
return nullptr;
|
|
}
|
|
|
|
std::shared_ptr<i2p::stream::StreamingDestination> ClientDestination::GetStreamingDestination (int port) const
|
|
{
|
|
if (port)
|
|
{
|
|
auto it = m_StreamingDestinationsByPorts.find (port);
|
|
if (it != m_StreamingDestinationsByPorts.end ())
|
|
return it->second;
|
|
}
|
|
// if port is zero or not found, use default destination
|
|
return m_StreamingDestination;
|
|
}
|
|
|
|
void ClientDestination::AcceptStreams (const i2p::stream::StreamingDestination::Acceptor& acceptor)
|
|
{
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|
if (m_StreamingDestination)
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|
m_StreamingDestination->SetAcceptor (acceptor);
|
|
}
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|
|
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void ClientDestination::StopAcceptingStreams ()
|
|
{
|
|
if (m_StreamingDestination)
|
|
m_StreamingDestination->ResetAcceptor ();
|
|
}
|
|
|
|
bool ClientDestination::IsAcceptingStreams () const
|
|
{
|
|
if (m_StreamingDestination)
|
|
return m_StreamingDestination->IsAcceptorSet ();
|
|
return false;
|
|
}
|
|
|
|
void ClientDestination::AcceptOnce (const i2p::stream::StreamingDestination::Acceptor& acceptor)
|
|
{
|
|
if (m_StreamingDestination)
|
|
m_StreamingDestination->AcceptOnce (acceptor);
|
|
}
|
|
|
|
std::shared_ptr<i2p::stream::StreamingDestination> ClientDestination::CreateStreamingDestination (int port, bool gzip)
|
|
{
|
|
auto dest = std::make_shared<i2p::stream::StreamingDestination> (GetSharedFromThis (), port, gzip);
|
|
if (port)
|
|
m_StreamingDestinationsByPorts[port] = dest;
|
|
else // update default
|
|
m_StreamingDestination = dest;
|
|
return dest;
|
|
}
|
|
|
|
i2p::datagram::DatagramDestination * ClientDestination::CreateDatagramDestination ()
|
|
{
|
|
if (m_DatagramDestination == nullptr)
|
|
m_DatagramDestination = new i2p::datagram::DatagramDestination (GetSharedFromThis ());
|
|
return m_DatagramDestination;
|
|
}
|
|
|
|
std::vector<std::shared_ptr<const i2p::stream::Stream> > ClientDestination::GetAllStreams () const
|
|
{
|
|
std::vector<std::shared_ptr<const i2p::stream::Stream> > ret;
|
|
if (m_StreamingDestination)
|
|
{
|
|
for (auto& it: m_StreamingDestination->GetStreams ())
|
|
ret.push_back (it.second);
|
|
}
|
|
for (auto& it: m_StreamingDestinationsByPorts)
|
|
for (auto& it1: it.second->GetStreams ())
|
|
ret.push_back (it1.second);
|
|
return ret;
|
|
}
|
|
|
|
void ClientDestination::PersistTemporaryKeys ()
|
|
{
|
|
std::string ident = GetIdentHash().ToBase32();
|
|
std::string path = i2p::fs::DataDirPath("destinations", (ident + ".dat"));
|
|
std::ifstream f(path, std::ifstream::binary);
|
|
|
|
if (f) {
|
|
f.read ((char *)m_EncryptionPublicKey, 256);
|
|
f.read ((char *)m_EncryptionPrivateKey, 256);
|
|
return;
|
|
}
|
|
|
|
LogPrint (eLogInfo, "Destination: Creating new temporary keys for address ", ident, ".b32.i2p");
|
|
i2p::data::PrivateKeys::GenerateCryptoKeyPair(GetIdentity ()->GetCryptoKeyType (),
|
|
m_EncryptionPrivateKey, m_EncryptionPublicKey);
|
|
|
|
std::ofstream f1 (path, std::ofstream::binary | std::ofstream::out);
|
|
if (f1) {
|
|
f1.write ((char *)m_EncryptionPublicKey, 256);
|
|
f1.write ((char *)m_EncryptionPrivateKey, 256);
|
|
return;
|
|
}
|
|
LogPrint(eLogError, "Destinations: Can't save keys to ", path);
|
|
}
|
|
|
|
void ClientDestination::CreateNewLeaseSet (std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> > tunnels)
|
|
{
|
|
auto leaseSet = new i2p::data::LocalLeaseSet (GetIdentity (), m_EncryptionPublicKey, tunnels);
|
|
// sign
|
|
Sign (leaseSet->GetBuffer (), leaseSet->GetBufferLen () - leaseSet->GetSignatureLen (), leaseSet->GetSignature ()); // TODO
|
|
SetLeaseSet (leaseSet);
|
|
}
|
|
|
|
void ClientDestination::CleanupDestination ()
|
|
{
|
|
if (m_DatagramDestination) m_DatagramDestination->CleanUp ();
|
|
}
|
|
|
|
bool ClientDestination::Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx) const
|
|
{
|
|
if (m_Decryptor)
|
|
return m_Decryptor->Decrypt (encrypted, data, ctx, true);
|
|
else
|
|
LogPrint (eLogError, "Destinations: decryptor is not set");
|
|
return false;
|
|
}
|
|
}
|
|
}
|