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i2pd/libi2pd/Destination.cpp

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/*
* Copyright (c) 2013-2024, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/
#include <algorithm>
#include <cassert>
#include <string>
#include <set>
#include <vector>
#include <boost/algorithm/string.hpp>
#include "Crypto.h"
#include "Log.h"
#include "FS.h"
#include "Timestamp.h"
#include "NetDb.hpp"
#include "Destination.h"
namespace i2p
{
namespace client
{
LeaseSetDestination::LeaseSetDestination (boost::asio::io_service& service,
bool isPublic, const std::map<std::string, std::string> * params):
m_Service (service), m_IsPublic (isPublic), m_PublishReplyToken (0),
m_LastSubmissionTime (0), m_PublishConfirmationTimer (m_Service),
m_PublishVerificationTimer (m_Service), m_PublishDelayTimer (m_Service), m_CleanupTimer (m_Service),
m_LeaseSetType (DEFAULT_LEASESET_TYPE), m_AuthType (i2p::data::ENCRYPTED_LEASESET_AUTH_TYPE_NONE)
{
int inLen = DEFAULT_INBOUND_TUNNEL_LENGTH;
int inQty = DEFAULT_INBOUND_TUNNELS_QUANTITY;
int outLen = DEFAULT_OUTBOUND_TUNNEL_LENGTH;
int outQty = DEFAULT_OUTBOUND_TUNNELS_QUANTITY;
int inVar = DEFAULT_INBOUND_TUNNELS_LENGTH_VARIANCE;
int outVar = DEFAULT_OUTBOUND_TUNNELS_LENGTH_VARIANCE;
int numTags = DEFAULT_TAGS_TO_SEND;
std::shared_ptr<std::vector<i2p::data::IdentHash> > explicitPeers;
try
{
if (params)
{
auto it = params->find (I2CP_PARAM_INBOUND_TUNNEL_LENGTH);
if (it != params->end ())
inLen = std::stoi(it->second);
it = params->find (I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH);
if (it != params->end ())
outLen = std::stoi(it->second);
it = params->find (I2CP_PARAM_INBOUND_TUNNELS_QUANTITY);
if (it != params->end ())
inQty = std::stoi(it->second);
it = params->find (I2CP_PARAM_OUTBOUND_TUNNELS_QUANTITY);
if (it != params->end ())
outQty = std::stoi(it->second);
it = params->find (I2CP_PARAM_INBOUND_TUNNELS_LENGTH_VARIANCE);
if (it != params->end ())
inVar = std::stoi(it->second);
it = params->find (I2CP_PARAM_OUTBOUND_TUNNELS_LENGTH_VARIANCE);
if (it != params->end ())
outVar = std::stoi(it->second);
it = params->find (I2CP_PARAM_TAGS_TO_SEND);
if (it != params->end ())
numTags = std::stoi(it->second);
LogPrint (eLogInfo, "Destination: Parameters for tunnel set to: ", inQty, " inbound (", inLen, " hops), ", outQty, " outbound (", outLen, " hops), ", numTags, " tags");
it = params->find (I2CP_PARAM_RATCHET_INBOUND_TAGS);
if (it != params->end ())
SetNumRatchetInboundTags (std::stoi(it->second));
it = params->find (I2CP_PARAM_EXPLICIT_PEERS);
if (it != params->end ())
{
explicitPeers = std::make_shared<std::vector<i2p::data::IdentHash> >();
std::stringstream ss(it->second);
std::string b64;
while (std::getline (ss, b64, ','))
{
i2p::data::IdentHash ident;
ident.FromBase64 (b64);
explicitPeers->push_back (ident);
LogPrint (eLogInfo, "Destination: Added to explicit peers list: ", b64);
}
}
it = params->find (I2CP_PARAM_INBOUND_NICKNAME);
if (it != params->end ()) m_Nickname = it->second;
else // try outbound
{
it = params->find (I2CP_PARAM_OUTBOUND_NICKNAME);
if (it != params->end ()) m_Nickname = it->second;
// otherwise we set default nickname in Start when we know local address
}
it = params->find (I2CP_PARAM_DONT_PUBLISH_LEASESET);
if (it != params->end ())
{
// oveeride isPublic
m_IsPublic = (it->second != "true");
}
it = params->find (I2CP_PARAM_LEASESET_TYPE);
if (it != params->end ())
m_LeaseSetType = std::stoi(it->second);
if (m_LeaseSetType == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2)
{
// authentication for encrypted LeaseSet
it = params->find (I2CP_PARAM_LEASESET_AUTH_TYPE);
if (it != params->end ())
{
auto authType = std::stoi (it->second);
if (authType >= i2p::data::ENCRYPTED_LEASESET_AUTH_TYPE_NONE && authType <= i2p::data::ENCRYPTED_LEASESET_AUTH_TYPE_PSK)
m_AuthType = authType;
else
LogPrint (eLogError, "Destination: Unknown auth type: ", authType);
}
}
it = params->find (I2CP_PARAM_LEASESET_PRIV_KEY);
if (it != params->end ())
{
m_LeaseSetPrivKey.reset (new i2p::data::Tag<32>());
if (m_LeaseSetPrivKey->FromBase64 (it->second) != 32)
{
LogPrint(eLogCritical, "Destination: Invalid value i2cp.leaseSetPrivKey: ", it->second);
m_LeaseSetPrivKey.reset (nullptr);
}
}
}
}
catch (std::exception & ex)
{
LogPrint(eLogError, "Destination: Unable to parse parameters for destination: ", ex.what());
}
SetNumTags (numTags);
m_Pool = i2p::tunnel::tunnels.CreateTunnelPool (inLen, outLen, inQty, outQty, inVar, outVar);
if (explicitPeers)
m_Pool->SetExplicitPeers (explicitPeers);
if(params)
{
auto itr = params->find(I2CP_PARAM_MAX_TUNNEL_LATENCY);
if (itr != params->end()) {
auto maxlatency = std::stoi(itr->second);
itr = params->find(I2CP_PARAM_MIN_TUNNEL_LATENCY);
if (itr != params->end()) {
auto minlatency = std::stoi(itr->second);
if ( minlatency > 0 && maxlatency > 0 ) {
// set tunnel pool latency
LogPrint(eLogInfo, "Destination: Requiring tunnel latency [", minlatency, "ms, ", maxlatency, "ms]");
m_Pool->RequireLatency(minlatency, maxlatency);
}
}
}
}
}
LeaseSetDestination::~LeaseSetDestination ()
{
if (m_Pool)
i2p::tunnel::tunnels.DeleteTunnelPool (m_Pool);
for (auto& it: m_LeaseSetRequests)
it.second->Complete (nullptr);
}
void LeaseSetDestination::Start ()
{
if (m_Nickname.empty ())
m_Nickname = i2p::data::GetIdentHashAbbreviation (GetIdentHash ()); // set default nickname
LoadTags ();
m_Pool->SetLocalDestination (shared_from_this ());
m_Pool->SetActive (true);
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::Stop ()
{
m_CleanupTimer.cancel ();
m_PublishConfirmationTimer.cancel ();
m_PublishVerificationTimer.cancel ();
if (m_Pool)
{
m_Pool->SetLocalDestination (nullptr);
i2p::tunnel::tunnels.StopTunnelPool (m_Pool);
}
SaveTags ();
CleanUp (); // GarlicDestination
}
bool LeaseSetDestination::Reconfigure(std::map<std::string, std::string> params)
{
auto itr = params.find("i2cp.dontPublishLeaseSet");
if (itr != params.end())
{
m_IsPublic = itr->second != "true";
}
int inLen, outLen, inQuant, outQuant, numTags, minLatency, maxLatency;
std::map<std::string, int&> intOpts = {
{I2CP_PARAM_INBOUND_TUNNEL_LENGTH, inLen},
{I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH, outLen},
{I2CP_PARAM_INBOUND_TUNNELS_QUANTITY, inQuant},
{I2CP_PARAM_OUTBOUND_TUNNELS_QUANTITY, outQuant},
{I2CP_PARAM_TAGS_TO_SEND, numTags},
{I2CP_PARAM_MIN_TUNNEL_LATENCY, minLatency},
{I2CP_PARAM_MAX_TUNNEL_LATENCY, maxLatency}
};
auto pool = GetTunnelPool();
inLen = pool->GetNumInboundHops();
outLen = pool->GetNumOutboundHops();
inQuant = pool->GetNumInboundTunnels();
outQuant = pool->GetNumOutboundTunnels();
minLatency = 0;
maxLatency = 0;
for (auto & opt : intOpts)
{
itr = params.find(opt.first);
if(itr != params.end())
{
opt.second = std::stoi(itr->second);
}
}
pool->RequireLatency(minLatency, maxLatency);
return pool->Reconfigure(inLen, outLen, inQuant, outQuant);
}
std::shared_ptr<i2p::data::LeaseSet> LeaseSetDestination::FindLeaseSet (const i2p::data::IdentHash& ident)
{
std::shared_ptr<i2p::data::LeaseSet> remoteLS;
{
std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
auto it = m_RemoteLeaseSets.find (ident);
if (it != m_RemoteLeaseSets.end ())
remoteLS = it->second;
}
if (remoteLS)
{
if (!remoteLS->IsExpired ())
{
if (remoteLS->ExpiresSoon())
{
LogPrint(eLogDebug, "Destination: Lease Set expires soon, updating before expire");
// update now before expiration for smooth handover
auto s = shared_from_this ();
RequestDestination(ident, [s, ident] (std::shared_ptr<i2p::data::LeaseSet> ls) {
if(ls && !ls->IsExpired())
{
ls->PopulateLeases();
{
std::lock_guard<std::mutex> _lock(s->m_RemoteLeaseSetsMutex);
s->m_RemoteLeaseSets[ident] = ls;
}
}
});
}
return remoteLS;
}
else
{
LogPrint (eLogWarning, "Destination: Remote LeaseSet expired");
std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
m_RemoteLeaseSets.erase (ident);
return nullptr;
}
}
return nullptr;
}
std::shared_ptr<const i2p::data::LocalLeaseSet> LeaseSetDestination::GetLeaseSet ()
{
if (!m_Pool) return nullptr;
if (!m_LeaseSet)
UpdateLeaseSet ();
auto ls = GetLeaseSetMt ();
return (ls && ls->GetInnerLeaseSet ()) ? ls->GetInnerLeaseSet () : ls; // always non-encrypted
}
std::shared_ptr<const i2p::data::LocalLeaseSet> LeaseSetDestination::GetLeaseSetMt ()
{
std::lock_guard<std::mutex> l(m_LeaseSetMutex);
return m_LeaseSet;
}
void LeaseSetDestination::SetLeaseSet (std::shared_ptr<const i2p::data::LocalLeaseSet> newLeaseSet)
{
{
std::lock_guard<std::mutex> l(m_LeaseSetMutex);
m_LeaseSet = newLeaseSet;
}
i2p::garlic::GarlicDestination::SetLeaseSetUpdated ();
if (m_IsPublic)
{
auto s = shared_from_this ();
m_Service.post ([s](void)
{
s->m_PublishVerificationTimer.cancel ();
s->Publish ();
});
}
}
void LeaseSetDestination::UpdateLeaseSet ()
{
int numTunnels = m_Pool->GetNumInboundTunnels () + 2; // 2 backup tunnels
if (numTunnels > i2p::data::MAX_NUM_LEASES) numTunnels = i2p::data::MAX_NUM_LEASES; // 16 tunnels maximum
auto tunnels = m_Pool->GetInboundTunnels (numTunnels);
if (!tunnels.empty ())
CreateNewLeaseSet (tunnels);
else
LogPrint (eLogInfo, "Destination: No inbound tunnels for LeaseSet");
}
bool LeaseSetDestination::SubmitSessionKey (const uint8_t * key, const uint8_t * tag)
{
struct
{
uint8_t k[32], t[32];
} data;
memcpy (data.k, key, 32);
memcpy (data.t, tag, 32);
auto s = shared_from_this ();
m_Service.post ([s,data](void)
{
s->AddSessionKey (data.k, data.t);
});
return true;
}
void LeaseSetDestination::SubmitECIESx25519Key (const uint8_t * key, uint64_t tag)
{
struct
{
uint8_t k[32];
uint64_t t;
} data;
memcpy (data.k, key, 32);
data.t = tag;
auto s = shared_from_this ();
m_Service.post ([s,data](void)
{
s->AddECIESx25519Key (data.k, data.t);
});
}
void LeaseSetDestination::ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg)
{
m_Service.post (std::bind (&LeaseSetDestination::HandleGarlicMessage, shared_from_this (), msg));
}
void LeaseSetDestination::ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg)
{
uint32_t msgID = bufbe32toh (msg->GetPayload () + DELIVERY_STATUS_MSGID_OFFSET);
m_Service.post (std::bind (&LeaseSetDestination::HandleDeliveryStatusMessage, shared_from_this (), msgID));
}
void LeaseSetDestination::HandleI2NPMessage (const uint8_t * buf, size_t len)
{
I2NPMessageType typeID = (I2NPMessageType)(buf[I2NP_HEADER_TYPEID_OFFSET]);
uint32_t msgID = bufbe32toh (buf + I2NP_HEADER_MSGID_OFFSET);
LeaseSetDestination::HandleCloveI2NPMessage (typeID, buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE, msgID);
}
bool LeaseSetDestination::HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len, uint32_t msgID)
{
switch (typeID)
{
case eI2NPData:
HandleDataMessage (payload, len);
break;
case eI2NPDeliveryStatus:
HandleDeliveryStatusMessage (bufbe32toh (payload + DELIVERY_STATUS_MSGID_OFFSET));
break;
case eI2NPTunnelTest:
if (m_Pool)
m_Pool->ProcessTunnelTest (bufbe32toh (payload + TUNNEL_TEST_MSGID_OFFSET), bufbe64toh (payload + TUNNEL_TEST_TIMESTAMP_OFFSET));
break;
case eI2NPDatabaseStore:
HandleDatabaseStoreMessage (payload, len);
break;
case eI2NPDatabaseSearchReply:
HandleDatabaseSearchReplyMessage (payload, len);
break;
case eI2NPShortTunnelBuildReply: // might come as garlic encrypted
i2p::HandleI2NPMessage (CreateI2NPMessage (typeID, payload, len, msgID));
break;
default:
LogPrint (eLogWarning, "Destination: Unexpected I2NP message type ", typeID);
return false;
}
return true;
}
void LeaseSetDestination::HandleDatabaseStoreMessage (const uint8_t * buf, size_t len)
{
if (len < DATABASE_STORE_HEADER_SIZE)
{
LogPrint (eLogError, "Destination: Database store msg is too short ", len);
return;
}
uint32_t replyToken = bufbe32toh (buf + DATABASE_STORE_REPLY_TOKEN_OFFSET);
size_t offset = DATABASE_STORE_HEADER_SIZE;
if (replyToken)
{
LogPrint (eLogInfo, "Destination: Reply token is ignored for DatabaseStore");
offset += 36;
}
if (offset > len || len > i2p::data::MAX_LS_BUFFER_SIZE + offset)
{
LogPrint (eLogError, "Destination: Database store message is too long ", len);
return;
}
i2p::data::IdentHash key (buf + DATABASE_STORE_KEY_OFFSET);
std::shared_ptr<i2p::data::LeaseSet> leaseSet;
switch (buf[DATABASE_STORE_TYPE_OFFSET])
{
case i2p::data::NETDB_STORE_TYPE_LEASESET: // 1
case i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2: // 3
{
LogPrint (eLogDebug, "Destination: Remote LeaseSet");
std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
auto it = m_RemoteLeaseSets.find (key);
if (it != m_RemoteLeaseSets.end () &&
it->second->GetStoreType () == buf[DATABASE_STORE_TYPE_OFFSET]) // update only if same type
{
leaseSet = it->second;
if (leaseSet->IsNewer (buf + offset, len - offset))
{
leaseSet->Update (buf + offset, len - offset);
if (leaseSet->IsValid () && leaseSet->GetIdentHash () == key && !leaseSet->IsExpired ())
LogPrint (eLogDebug, "Destination: Remote LeaseSet updated");
else
{
LogPrint (eLogDebug, "Destination: Remote LeaseSet update failed");
m_RemoteLeaseSets.erase (it);
leaseSet = nullptr;
}
}
else
LogPrint (eLogDebug, "Destination: Remote LeaseSet is older. Not updated");
}
else
{
// add or replace
if (buf[DATABASE_STORE_TYPE_OFFSET] == i2p::data::NETDB_STORE_TYPE_LEASESET)
leaseSet = std::make_shared<i2p::data::LeaseSet> (buf + offset, len - offset); // LeaseSet
else
leaseSet = std::make_shared<i2p::data::LeaseSet2> (buf[DATABASE_STORE_TYPE_OFFSET], buf + offset, len - offset, true, GetPreferredCryptoType () ); // LeaseSet2
if (leaseSet->IsValid () && leaseSet->GetIdentHash () == key && !leaseSet->IsExpired ())
{
if (leaseSet->GetIdentHash () != GetIdentHash ())
{
LogPrint (eLogDebug, "Destination: New remote LeaseSet added");
m_RemoteLeaseSets[key] = leaseSet;
}
else
LogPrint (eLogDebug, "Destination: Own remote LeaseSet dropped");
}
else
{
LogPrint (eLogError, "Destination: New remote LeaseSet failed");
leaseSet = nullptr;
}
}
break;
}
case i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2: // 5
{
auto it2 = m_LeaseSetRequests.find (key);
if (it2 != m_LeaseSetRequests.end () && it2->second->requestedBlindedKey)
{
auto ls2 = std::make_shared<i2p::data::LeaseSet2> (buf + offset, len - offset,
it2->second->requestedBlindedKey, m_LeaseSetPrivKey ? ((const uint8_t *)*m_LeaseSetPrivKey) : nullptr , GetPreferredCryptoType ());
if (ls2->IsValid () && !ls2->IsExpired ())
{
leaseSet = ls2;
std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
m_RemoteLeaseSets[ls2->GetIdentHash ()] = ls2; // ident is not key
m_RemoteLeaseSets[key] = ls2; // also store as key for next lookup
}
else
LogPrint (eLogError, "Destination: New remote encrypted LeaseSet2 failed");
}
else
LogPrint (eLogInfo, "Destination: Couldn't find request for encrypted LeaseSet2");
break;
}
default:
LogPrint (eLogError, "Destination: Unexpected client's DatabaseStore type ", buf[DATABASE_STORE_TYPE_OFFSET], ", dropped");
}
auto it1 = m_LeaseSetRequests.find (key);
if (it1 != m_LeaseSetRequests.end ())
{
it1->second->requestTimeoutTimer.cancel ();
if (it1->second) it1->second->Complete (leaseSet);
m_LeaseSetRequests.erase (it1);
}
}
void LeaseSetDestination::HandleDatabaseSearchReplyMessage (const uint8_t * buf, size_t len)
{
i2p::data::IdentHash key (buf);
int num = buf[32]; // num
LogPrint (eLogDebug, "Destination: DatabaseSearchReply for ", key.ToBase64 (), " num=", num);
auto it = m_LeaseSetRequests.find (key);
if (it != m_LeaseSetRequests.end ())
{
auto request = it->second;
for (int i = 0; i < num; i++)
{
i2p::data::IdentHash peerHash (buf + 33 + i*32);
if (!request->excluded.count (peerHash) && !i2p::data::netdb.FindRouter (peerHash))
{
LogPrint (eLogInfo, "Destination: Found new floodfill, request it");
i2p::data::netdb.RequestDestination (peerHash, nullptr, false); // through exploratory
}
}
SendNextLeaseSetRequest (key, request);
}
else
LogPrint (eLogWarning, "Destination: Request for ", key.ToBase64 (), " not found");
}
void LeaseSetDestination::SendNextLeaseSetRequest (const i2p::data::IdentHash& key,
std::shared_ptr<LeaseSetRequest> request)
{
bool found = false;
if (request->excluded.size () < MAX_NUM_FLOODFILLS_PER_REQUEST)
{
auto floodfill = i2p::data::netdb.GetClosestFloodfill (key, request->excluded);
if (floodfill)
{
LogPrint (eLogInfo, "Destination: Requesting ", key.ToBase64 (), " at ", floodfill->GetIdentHash ().ToBase64 ());
if (SendLeaseSetRequest (key, floodfill, request))
found = true;
}
}
if (!found)
{
LogPrint (eLogInfo, "Destination: ", key.ToBase64 (), " was not found on ", MAX_NUM_FLOODFILLS_PER_REQUEST, " floodfills");
request->Complete (nullptr);
m_LeaseSetRequests.erase (key);
}
}
void LeaseSetDestination::HandleDeliveryStatusMessage (uint32_t msgID)
{
if (msgID == m_PublishReplyToken)
{
LogPrint (eLogDebug, "Destination: Publishing LeaseSet confirmed for ", GetIdentHash().ToBase32());
m_ExcludedFloodfills.clear ();
m_PublishReplyToken = 0;
// 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 (msgID);
}
void LeaseSetDestination::SetLeaseSetUpdated ()
{
UpdateLeaseSet ();
}
void LeaseSetDestination::Publish ()
{
auto leaseSet = GetLeaseSetMt ();
if (!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 floodfill = i2p::data::netdb.GetClosestFloodfill (leaseSet->GetStoreHash (), m_ExcludedFloodfills);
if (!floodfill)
{
LogPrint (eLogError, "Destination: Can't publish LeaseSet, no more floodfills found");
m_ExcludedFloodfills.clear ();
return;
}
auto outbound = m_Pool->GetNextOutboundTunnel (nullptr, floodfill->GetCompatibleTransports (false));
auto inbound = m_Pool->GetNextInboundTunnel (nullptr, floodfill->GetCompatibleTransports (true));
if (!outbound || !inbound)
{
if (!m_Pool->GetInboundTunnels ().empty () && !m_Pool->GetOutboundTunnels ().empty ())
{
LogPrint (eLogInfo, "Destination: No compatible tunnels with ", floodfill->GetIdentHash ().ToBase64 (), ". Trying another floodfill");
m_ExcludedFloodfills.insert (floodfill->GetIdentHash ());
floodfill = i2p::data::netdb.GetClosestFloodfill (leaseSet->GetStoreHash (), m_ExcludedFloodfills);
if (floodfill)
{
outbound = m_Pool->GetNextOutboundTunnel (nullptr, floodfill->GetCompatibleTransports (false));
if (outbound)
{
inbound = m_Pool->GetNextInboundTunnel (nullptr, floodfill->GetCompatibleTransports (true));
if (!inbound)
LogPrint (eLogError, "Destination: Can't publish LeaseSet. No inbound tunnels");
}
else
LogPrint (eLogError, "Destination: Can't publish LeaseSet. No outbound tunnels");
}
else
LogPrint (eLogError, "Destination: Can't publish LeaseSet, no more floodfills found");
}
else
LogPrint (eLogDebug, "Destination: No tunnels in pool");
if (!floodfill || !outbound || !inbound)
{
// we can't publish now
m_ExcludedFloodfills.clear ();
m_PublishReplyToken = 1; // dummy non-zero value
// try again after a while
LogPrint (eLogInfo, "Destination: Can't publish LeasetSet because destination is not ready. Try publishing again after ", PUBLISH_CONFIRMATION_TIMEOUT, " seconds");
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));
return;
}
}
m_ExcludedFloodfills.insert (floodfill->GetIdentHash ());
LogPrint (eLogDebug, "Destination: Publish LeaseSet of ", GetIdentHash ().ToBase32 ());
RAND_bytes ((uint8_t *)&m_PublishReplyToken, 4);
auto msg = WrapMessageForRouter (floodfill, i2p::CreateDatabaseStoreMsg (leaseSet, m_PublishReplyToken, inbound));
auto s = shared_from_this ();
msg->onDrop = [s]()
{
s->GetService ().post([s]()
{
s->m_PublishConfirmationTimer.cancel ();
s->HandlePublishConfirmationTimer (boost::system::error_code());
});
};
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->SendTunnelDataMsgTo (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 or failed. 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 confirmation 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 ls = GetLeaseSetMt ();
if (!ls)
{
LogPrint (eLogWarning, "Destination: Couldn't verify LeaseSet for ", GetIdentHash().ToBase32());
return;
}
auto s = shared_from_this ();
RequestLeaseSet (ls->GetStoreHash (),
[s, ls](std::shared_ptr<const i2p::data::LeaseSet> leaseSet)
{
if (leaseSet)
{
if (*ls == *leaseSet)
{
// we got latest LeasetSet
LogPrint (eLogDebug, "Destination: Published LeaseSet verified for ", s->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 ", s->GetIdentHash().ToBase32());
}
else
LogPrint (eLogWarning, "Destination: Couldn't find published LeaseSet for ", s->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, nullptr));
return true;
}
bool LeaseSetDestination::RequestDestinationWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::BlindedPublicKey> dest, RequestComplete requestComplete)
{
if (!dest || !m_Pool || !IsReady ())
{
if (requestComplete)
m_Service.post ([requestComplete](void){requestComplete (nullptr);});
return false;
}
auto storeHash = dest->GetStoreHash ();
auto leaseSet = FindLeaseSet (storeHash);
if (leaseSet)
{
if (requestComplete)
m_Service.post ([requestComplete, leaseSet](void){requestComplete (leaseSet);});
return true;
}
m_Service.post (std::bind (&LeaseSetDestination::RequestLeaseSet, shared_from_this (), storeHash, requestComplete, dest));
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::CancelDestinationRequestWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::BlindedPublicKey> dest, bool notify)
{
if (dest)
CancelDestinationRequest (dest->GetStoreHash (), notify);
}
void LeaseSetDestination::RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete, std::shared_ptr<const i2p::data::BlindedPublicKey> requestedBlindedKey)
{
std::set<i2p::data::IdentHash> excluded;
auto floodfill = i2p::data::netdb.GetClosestFloodfill (dest, excluded);
if (floodfill)
{
auto request = std::make_shared<LeaseSetRequest> (m_Service);
request->requestedBlindedKey = requestedBlindedKey; // for encrypted LeaseSet2
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))
{
// try another
LogPrint (eLogWarning, "Destination: Couldn't send LeaseSet request to ", floodfill->GetIdentHash ().ToBase64 (), ". Trying another");
request->excluded.insert (floodfill->GetIdentHash ());
floodfill = i2p::data::netdb.GetClosestFloodfill (dest, request->excluded);
if (!SendLeaseSetRequest (dest, floodfill, request))
{
// request failed
LogPrint (eLogWarning, "Destination: LeaseSet request for ", dest.ToBase32 (), " was not sent");
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 (nullptr, nextFloodfill->GetCompatibleTransports (false)); // outbound from floodfill
if (!request->replyTunnel) LogPrint (eLogWarning, "Destination: Can't send LeaseSet request, no compatible inbound tunnels found");
if (!request->outboundTunnel || !request->outboundTunnel->IsEstablished ())
request->outboundTunnel = m_Pool->GetNextOutboundTunnel (nullptr, nextFloodfill->GetCompatibleTransports (true)); // inbound from floodfill
if (!request->outboundTunnel) LogPrint (eLogWarning, "Destination: Can't send LeaseSet request, no compatible outbound tunnels found");
if (request->replyTunnel && request->outboundTunnel)
{
request->excluded.insert (nextFloodfill->GetIdentHash ());
request->requestTimeoutTimer.cancel ();
bool isECIES = SupportsEncryptionType (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD) &&
nextFloodfill->GetVersion () >= MAKE_VERSION_NUMBER(0, 9, 46); // >= 0.9.46;
uint8_t replyKey[32], replyTag[32];
RAND_bytes (replyKey, 32); // random session key
RAND_bytes (replyTag, isECIES ? 8 : 32); // random session tag
if (isECIES)
AddECIESx25519Key (replyKey, replyTag);
else
AddSessionKey (replyKey, replyTag);
auto msg = WrapMessageForRouter (nextFloodfill,
CreateLeaseSetDatabaseLookupMsg (dest, request->excluded, request->replyTunnel, replyKey, replyTag, isECIES));
auto s = shared_from_this ();
msg->onDrop = [s, dest, request]()
{
s->GetService ().post([s, dest, request]()
{
s->SendNextLeaseSetRequest (dest, request);
});
};
request->outboundTunnel->SendTunnelDataMsgs (
{
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;
}
}
i2p::data::CryptoKeyType LeaseSetDestination::GetPreferredCryptoType () const
{
if (SupportsEncryptionType (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD))
return i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD;
return i2p::data::CRYPTO_KEY_TYPE_ELGAMAL;
}
ClientDestination::ClientDestination (boost::asio::io_service& service, const i2p::data::PrivateKeys& keys,
bool isPublic, const std::map<std::string, std::string> * params):
LeaseSetDestination (service, isPublic, params),
m_Keys (keys), m_StreamingAckDelay (DEFAULT_INITIAL_ACK_DELAY),
m_IsStreamingAnswerPings (DEFAULT_ANSWER_PINGS), m_LastPort (0),
m_DatagramDestination (nullptr), m_RefCounter (0),
m_ReadyChecker(service)
{
if (keys.IsOfflineSignature () && GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_LEASESET)
SetLeaseSetType (i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2); // offline keys can be published with LS2 only
// extract encryption type params for LS2
std::set<i2p::data::CryptoKeyType> encryptionKeyTypes;
if (params)
{
auto it = params->find (I2CP_PARAM_LEASESET_ENCRYPTION_TYPE);
if (it != params->end ())
{
// comma-separated values
std::vector<std::string> values;
boost::split(values, it->second, boost::is_any_of(","));
for (auto& it1: values)
{
try
{
encryptionKeyTypes.insert (std::stoi(it1));
}
catch (std::exception& ex)
{
LogPrint (eLogInfo, "Destination: Unexpected crypto type ", it1, ". ", ex.what ());
continue;
}
}
}
}
// if no param or valid crypto type use from identity
bool isSingleKey = false;
if (encryptionKeyTypes.empty ())
{
isSingleKey = true;
encryptionKeyTypes.insert (GetIdentity ()->GetCryptoKeyType ());
}
for (auto& it: encryptionKeyTypes)
{
auto encryptionKey = new EncryptionKey (it);
if (IsPublic ())
PersistTemporaryKeys (encryptionKey, isSingleKey);
else
encryptionKey->GenerateKeys ();
encryptionKey->CreateDecryptor ();
if (it == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD)
{
m_ECIESx25519EncryptionKey.reset (encryptionKey);
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_LEASESET)
SetLeaseSetType (i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2); // Rathets must use LeaseSet2
}
else
m_StandardEncryptionKey.reset (encryptionKey);
}
if (IsPublic ())
LogPrint (eLogInfo, "Destination: Local address ", GetIdentHash().ToBase32 (), " created");
try
{
if (params)
{
// extract streaming params
auto it = params->find (I2CP_PARAM_STREAMING_INITIAL_ACK_DELAY);
if (it != params->end ())
m_StreamingAckDelay = std::stoi(it->second);
it = params->find (I2CP_PARAM_STREAMING_ANSWER_PINGS);
if (it != params->end ())
m_IsStreamingAnswerPings = std::stoi (it->second); // 1 for true
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2)
{
// authentication for encrypted LeaseSet
auto authType = GetAuthType ();
if (authType > 0)
{
m_AuthKeys = std::make_shared<std::vector<i2p::data::AuthPublicKey> >();
if (authType == i2p::data::ENCRYPTED_LEASESET_AUTH_TYPE_DH)
ReadAuthKey (I2CP_PARAM_LEASESET_CLIENT_DH, params);
else if (authType == i2p::data::ENCRYPTED_LEASESET_AUTH_TYPE_PSK)
ReadAuthKey (I2CP_PARAM_LEASESET_CLIENT_PSK, params);
else
LogPrint (eLogError, "Destination: Unexpected auth type: ", authType);
if (m_AuthKeys->size ())
LogPrint (eLogInfo, "Destination: ", m_AuthKeys->size (), " auth keys read");
else
{
LogPrint (eLogCritical, "Destination: No auth keys read for auth type: ", authType);
m_AuthKeys = nullptr;
}
}
}
}
}
catch (std::exception & ex)
{
LogPrint(eLogCritical, "Destination: Unable to parse parameters for destination: ", ex.what());
}
}
ClientDestination::~ClientDestination ()
{
}
void ClientDestination::Start ()
{
LeaseSetDestination::Start ();
m_StreamingDestination = std::make_shared<i2p::stream::StreamingDestination> (GetSharedFromThis ()); // TODO:
m_StreamingDestination->Start ();
for (auto& it: m_StreamingDestinationsByPorts)
it.second->Start ();
}
void ClientDestination::Stop ()
{
LogPrint(eLogDebug, "Destination: Stopping destination ", GetIdentHash().ToBase32(), ".b32.i2p");
LeaseSetDestination::Stop ();
m_ReadyChecker.cancel();
LogPrint(eLogDebug, "Destination: -> Stopping Streaming Destination");
m_StreamingDestination->Stop ();
//m_StreamingDestination->SetOwner (nullptr);
m_StreamingDestination = nullptr;
LogPrint(eLogDebug, "Destination: -> Stopping Streaming Destination by ports");
for (auto& it: m_StreamingDestinationsByPorts)
{
it.second->Stop ();
//it.second->SetOwner (nullptr);
}
m_StreamingDestinationsByPorts.clear ();
m_LastStreamingDestination = nullptr;
if (m_DatagramDestination)
{
LogPrint(eLogDebug, "Destination: -> Stopping Datagram Destination");
delete m_DatagramDestination;
m_DatagramDestination = nullptr;
}
LogPrint(eLogDebug, "Destination: -> Stopping done");
}
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
if (toPort != m_LastPort || !m_LastStreamingDestination)
{
m_LastStreamingDestination = GetStreamingDestination (toPort);
if (!m_LastStreamingDestination)
m_LastStreamingDestination = m_StreamingDestination; // if no destination on port use default
m_LastPort = toPort;
}
if (m_LastStreamingDestination)
m_LastStreamingDestination->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;
case PROTOCOL_TYPE_RAW:
// raw datagram
if (m_DatagramDestination)
m_DatagramDestination->HandleDataMessagePayload (fromPort, toPort, buf, length, true);
else
LogPrint (eLogError, "Destination: Missing raw datagram destination");
break;
default:
LogPrint (eLogError, "Destination: Data: Unexpected protocol ", buf[9]);
}
}
void ClientDestination::CreateStream (StreamRequestComplete streamRequestComplete, const i2p::data::IdentHash& dest, uint16_t port)
{
if (!streamRequestComplete)
{
LogPrint (eLogError, "Destination: Request callback is not specified in CreateStream");
return;
}
auto leaseSet = FindLeaseSet (dest);
if (leaseSet)
{
auto stream = CreateStream (leaseSet, port);
GetService ().post ([streamRequestComplete, stream]()
{
streamRequestComplete(stream);
});
}
else
{
auto s = GetSharedFromThis ();
RequestDestination (dest,
[s, streamRequestComplete, port](std::shared_ptr<const i2p::data::LeaseSet> ls)
{
if (ls)
streamRequestComplete(s->CreateStream (ls, port));
else
streamRequestComplete (nullptr);
});
}
}
void ClientDestination::CreateStream (StreamRequestComplete streamRequestComplete, std::shared_ptr<const i2p::data::BlindedPublicKey> dest, uint16_t port)
{
if (!streamRequestComplete)
{
LogPrint (eLogError, "Destination: Request callback is not specified in CreateStream");
return;
}
auto s = GetSharedFromThis ();
RequestDestinationWithEncryptedLeaseSet (dest,
[s, streamRequestComplete, port](std::shared_ptr<i2p::data::LeaseSet> ls)
{
if (ls)
streamRequestComplete(s->CreateStream (ls, port));
else
streamRequestComplete (nullptr);
});
}
template<typename Dest>
std::shared_ptr<i2p::stream::Stream> ClientDestination::CreateStreamSync (const Dest& dest, uint16_t port)
{
volatile bool done = false;
std::shared_ptr<i2p::stream::Stream> stream;
std::condition_variable streamRequestComplete;
std::mutex streamRequestCompleteMutex;
CreateStream (
[&done, &streamRequestComplete, &streamRequestCompleteMutex, &stream](std::shared_ptr<i2p::stream::Stream> s)
{
stream = s;
std::unique_lock<std::mutex> l(streamRequestCompleteMutex);
streamRequestComplete.notify_all ();
done = true;
},
dest, port);
while (!done)
{
std::unique_lock<std::mutex> l(streamRequestCompleteMutex);
if (!done)
streamRequestComplete.wait (l);
}
return stream;
}
std::shared_ptr<i2p::stream::Stream> ClientDestination::CreateStream (const i2p::data::IdentHash& dest, uint16_t port)
{
return CreateStreamSync (dest, port);
}
std::shared_ptr<i2p::stream::Stream> ClientDestination::CreateStream (std::shared_ptr<const i2p::data::BlindedPublicKey> dest, uint16_t port)
{
return CreateStreamSync (dest, port);
}
std::shared_ptr<i2p::stream::Stream> ClientDestination::CreateStream (std::shared_ptr<const i2p::data::LeaseSet> remote, uint16_t port)
{
if (m_StreamingDestination)
return m_StreamingDestination->CreateNewOutgoingStream (remote, port);
else
return nullptr;
}
void ClientDestination::SendPing (const i2p::data::IdentHash& to)
{
if (m_StreamingDestination)
{
auto leaseSet = FindLeaseSet (to);
if (leaseSet)
m_StreamingDestination->SendPing (leaseSet);
else
{
auto s = m_StreamingDestination;
RequestDestination (to,
[s](std::shared_ptr<const i2p::data::LeaseSet> ls)
{
if (ls) s->SendPing (ls);
});
}
}
}
void ClientDestination::SendPing (std::shared_ptr<const i2p::data::BlindedPublicKey> to)
{
auto s = m_StreamingDestination;
RequestDestinationWithEncryptedLeaseSet (to,
[s](std::shared_ptr<const i2p::data::LeaseSet> ls)
{
if (ls) s->SendPing (ls);
});
}
std::shared_ptr<i2p::stream::StreamingDestination> ClientDestination::GetStreamingDestination (uint16_t port) const
{
if (port)
{
auto it = m_StreamingDestinationsByPorts.find (port);
if (it != m_StreamingDestinationsByPorts.end ())
return it->second;
}
else // if port is zero, use default destination
return m_StreamingDestination;
return nullptr;
}
void ClientDestination::AcceptStreams (const i2p::stream::StreamingDestination::Acceptor& acceptor)
{
if (m_StreamingDestination)
m_StreamingDestination->SetAcceptor (acceptor);
}
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 (uint16_t 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;
}
std::shared_ptr<i2p::stream::StreamingDestination> ClientDestination::RemoveStreamingDestination (uint16_t port)
{
if (port)
{
auto it = m_StreamingDestinationsByPorts.find (port);
if (it != m_StreamingDestinationsByPorts.end ())
{
auto ret = it->second;
m_StreamingDestinationsByPorts.erase (it);
return ret;
}
}
return nullptr;
}
i2p::datagram::DatagramDestination * ClientDestination::CreateDatagramDestination (bool gzip)
{
if (m_DatagramDestination == nullptr)
m_DatagramDestination = new i2p::datagram::DatagramDestination (GetSharedFromThis (), gzip);
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 (EncryptionKey * keys, bool isSingleKey)
{
if (!keys) return;
std::string ident = GetIdentHash().ToBase32();
std::string path = i2p::fs::DataDirPath("destinations",
isSingleKey ? (ident + ".dat") : (ident + "." + std::to_string (keys->keyType) + ".dat"));
std::ifstream f(path, std::ifstream::binary);
if (f) {
f.read ((char *)keys->pub, 256);
f.read ((char *)keys->priv, 256);
return;
}
LogPrint (eLogInfo, "Destination: Creating new temporary keys of type for address ", ident, ".b32.i2p");
memset (keys->priv, 0, 256);
memset (keys->pub, 0, 256);
keys->GenerateKeys ();
// TODO:: persist crypto key type
std::ofstream f1 (path, std::ofstream::binary | std::ofstream::out);
if (f1) {
f1.write ((char *)keys->pub, 256);
f1.write ((char *)keys->priv, 256);
return;
}
LogPrint(eLogCritical, "Destinations: Can't save keys to ", path);
}
void ClientDestination::CreateNewLeaseSet (const std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> >& tunnels)
{
std::shared_ptr<i2p::data::LocalLeaseSet> leaseSet;
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_LEASESET)
{
if (m_StandardEncryptionKey)
{
leaseSet = std::make_shared<i2p::data::LocalLeaseSet> (GetIdentity (), m_StandardEncryptionKey->pub, tunnels);
// sign
Sign (leaseSet->GetBuffer (), leaseSet->GetBufferLen () - leaseSet->GetSignatureLen (), leaseSet->GetSignature ());
}
else
LogPrint (eLogError, "Destinations: Wrong encryption key type for LeaseSet type 1");
}
else
{
// standard LS2 (type 3) first
i2p::data::LocalLeaseSet2::KeySections keySections;
if (m_ECIESx25519EncryptionKey)
keySections.push_back ({m_ECIESx25519EncryptionKey->keyType, 32, m_ECIESx25519EncryptionKey->pub} );
if (m_StandardEncryptionKey)
keySections.push_back ({m_StandardEncryptionKey->keyType, (uint16_t)m_StandardEncryptionKey->decryptor->GetPublicKeyLen (), m_StandardEncryptionKey->pub} );
bool isPublishedEncrypted = GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2;
auto ls2 = std::make_shared<i2p::data::LocalLeaseSet2> (i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2,
m_Keys, keySections, tunnels, IsPublic (), isPublishedEncrypted);
if (isPublishedEncrypted) // encrypt if type 5
ls2 = std::make_shared<i2p::data::LocalEncryptedLeaseSet2> (ls2, m_Keys, GetAuthType (), m_AuthKeys);
leaseSet = ls2;
}
SetLeaseSet (leaseSet);
}
void ClientDestination::CleanupDestination ()
{
if (m_DatagramDestination) m_DatagramDestination->CleanUp ();
}
bool ClientDestination::Decrypt (const uint8_t * encrypted, uint8_t * data, i2p::data::CryptoKeyType preferredCrypto) const
{
if (preferredCrypto == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD)
if (m_ECIESx25519EncryptionKey && m_ECIESx25519EncryptionKey->decryptor)
return m_ECIESx25519EncryptionKey->decryptor->Decrypt (encrypted, data);
if (m_StandardEncryptionKey && m_StandardEncryptionKey->decryptor)
return m_StandardEncryptionKey->decryptor->Decrypt (encrypted, data);
else
LogPrint (eLogError, "Destinations: Decryptor is not set");
return false;
}
bool ClientDestination::SupportsEncryptionType (i2p::data::CryptoKeyType keyType) const
{
return keyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD ? (bool)m_ECIESx25519EncryptionKey : (bool)m_StandardEncryptionKey;
}
const uint8_t * ClientDestination::GetEncryptionPublicKey (i2p::data::CryptoKeyType keyType) const
{
if (keyType == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD)
return m_ECIESx25519EncryptionKey ? m_ECIESx25519EncryptionKey->pub : nullptr;
return m_StandardEncryptionKey ? m_StandardEncryptionKey->pub : nullptr;
}
void ClientDestination::ReadAuthKey (const std::string& group, const std::map<std::string, std::string> * params)
{
for (auto it: *params)
if (it.first.length () >= group.length () && !it.first.compare (0, group.length (), group))
{
auto pos = it.second.find (':');
if (pos != std::string::npos)
{
i2p::data::AuthPublicKey pubKey;
if (pubKey.FromBase64 (it.second.substr (pos+1)))
m_AuthKeys->push_back (pubKey);
else
LogPrint (eLogCritical, "Destination: Unexpected auth key: ", it.second.substr (pos+1));
}
}
}
bool ClientDestination::DeleteStream (uint32_t recvStreamID)
{
if (m_StreamingDestination->DeleteStream (recvStreamID))
return true;
for (auto it: m_StreamingDestinationsByPorts)
if (it.second->DeleteStream (recvStreamID))
return true;
return false;
}
RunnableClientDestination::RunnableClientDestination (const i2p::data::PrivateKeys& keys, bool isPublic, const std::map<std::string, std::string> * params):
RunnableService ("Destination"),
ClientDestination (GetIOService (), keys, isPublic, params)
{
}
RunnableClientDestination::~RunnableClientDestination ()
{
if (IsRunning ())
Stop ();
}
void RunnableClientDestination::Start ()
{
if (!IsRunning ())
{
ClientDestination::Start ();
StartIOService ();
}
}
void RunnableClientDestination::Stop ()
{
if (IsRunning ())
{
ClientDestination::Stop ();
StopIOService ();
}
}
}
}
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