Archives/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2024-11-08 01:10:40 +00:00
Code Issues Projects Releases Wiki Activity
07405e57b9
i2pd/libi2pd/Destination.cpp
orignal 07bbbbaf61 fixed gcc 4.7 build
2019-04-17 12:42:43 -04:00

1156 lines
38 KiB
C++
Raw Blame History

#include <algorithm>
#include <cassert>
#include <string>
#include "Crypto.h"
#include "Log.h"
#include "FS.h"
#include "Timestamp.h"
#include "NetDb.hpp"
#include "Destination.h"
#include "util.h"
namespace i2p
{
namespace client
{
LeaseSetDestination::LeaseSetDestination (bool isPublic, const std::map<std::string, std::string> * params):
m_IsRunning (false), m_Thread (nullptr), 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)
{
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 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_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_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_LEASESET_TYPE);
if (it != params->end ())
m_LeaseSetType = std::stoi(it->second);
}
}
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);
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_IsRunning)
Stop ();
if (m_Pool)
i2p::tunnel::tunnels.DeleteTunnelPool (m_Pool);
for (auto& it: m_LeaseSetRequests)
it.second->Complete (nullptr);
}
void LeaseSetDestination::Run ()
{
while (m_IsRunning)
{
try
{
m_Service.run ();
}
catch (std::exception& ex)
{
LogPrint (eLogError, "Destination: runtime exception: ", ex.what ());
}
}
}
bool LeaseSetDestination::Start ()
{
if (!m_IsRunning)
{
if (m_Nickname.empty ())
m_Nickname = i2p::data::GetIdentHashAbbreviation (GetIdentHash ()); // set default nickname
LoadTags ();
m_IsRunning = true;
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));
m_Thread = new std::thread (std::bind (&LeaseSetDestination::Run, shared_from_this ()));
return true;
}
else
return false;
}
bool LeaseSetDestination::Stop ()
{
if (m_IsRunning)
{
m_CleanupTimer.cancel ();
m_PublishConfirmationTimer.cancel ();
m_PublishVerificationTimer.cancel ();
m_IsRunning = false;
if (m_Pool)
{
m_Pool->SetLocalDestination (nullptr);
i2p::tunnel::tunnels.StopTunnelPool (m_Pool);
}
m_Service.stop ();
if (m_Thread)
{
m_Thread->join ();
delete m_Thread;
m_Thread = 0;
}
SaveTags ();
CleanUp (); // GarlicDestination
return true;
}
else
return false;
}
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;
}
}
else
{
auto ls = i2p::data::netdb.FindLeaseSet (ident);
if (ls && !ls->IsExpired ())
{
ls->PopulateLeases (); // since we don't store them in netdb
std::lock_guard<std::mutex> _lock(m_RemoteLeaseSetsMutex);
m_RemoteLeaseSets[ident] = ls;
return ls;
}
}
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
CreateNewLeaseSet (m_Pool->GetInboundTunnels (numTunnels));
}
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::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)
{
m_Service.post (std::bind (&LeaseSetDestination::HandleDeliveryStatusMessage, shared_from_this (), msg));
}
void LeaseSetDestination::HandleI2NPMessage (const uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from)
{
uint8_t typeID = buf[I2NP_HEADER_TYPEID_OFFSET];
switch (typeID)
{
case eI2NPData:
HandleDataMessage (buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE);
break;
case eI2NPDeliveryStatus:
// we assume tunnel tests non-encrypted
HandleDeliveryStatusMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len), from));
break;
case eI2NPDatabaseStore:
HandleDatabaseStoreMessage (buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE);
break;
case eI2NPDatabaseSearchReply:
HandleDatabaseSearchReplyMessage (buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE);
break;
default:
i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len), from));
}
}
void LeaseSetDestination::HandleDatabaseStoreMessage (const uint8_t * buf, size_t len)
{
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;
}
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 ())
{
leaseSet = it->second;
if (leaseSet->IsNewer (buf + offset, len - offset))
{
leaseSet->Update (buf + offset, len - offset);
if (leaseSet->IsValid () && leaseSet->GetIdentHash () == key)
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
{
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); // LeaseSet2
if (leaseSet->IsValid () && leaseSet->GetIdentHash () == key)
{
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);
if (ls2->IsValid ())
{
m_RemoteLeaseSets[ls2->GetIdentHash ()] = ls2; // ident is not key
m_RemoteLeaseSets[key] = ls2; // also store as key for next lookup
leaseSet = ls2;
}
}
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;
bool found = false;
if (request->excluded.size () < MAX_NUM_FLOODFILLS_PER_REQUEST)
{
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"); // TODO: recheck this message
i2p::data::netdb.RequestDestination (peerHash);
}
}
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);
}
}
else
LogPrint (eLogWarning, "Destination: Request for ", key.ToBase64 (), " not found");
}
void LeaseSetDestination::HandleDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg)
{
uint32_t msgID = bufbe32toh (msg->GetPayload () + DELIVERY_STATUS_MSGID_OFFSET);
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 (msg);
}
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 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 (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 (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 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 ();
// we must capture this for gcc 4.7 due the bug
RequestLeaseSet (ls->GetStoreHash (),
[s, ls, this](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))
{
// 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 (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
m_EncryptionKeyType = GetIdentity ()->GetCryptoKeyType ();
// extract encryption type params for LS2
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2 && params)
{
auto it = params->find (I2CP_PARAM_LEASESET_ENCRYPTION_TYPE);
if (it != params->end ())
m_EncryptionKeyType = std::stoi(it->second);
}
if (isPublic && m_EncryptionKeyType == GetIdentity ()->GetCryptoKeyType ()) // TODO: presist key type
PersistTemporaryKeys ();
else
i2p::data::PrivateKeys::GenerateCryptoKeyPair (m_EncryptionKeyType, m_EncryptionPrivateKey, m_EncryptionPublicKey);
m_Decryptor = i2p::data::PrivateKeys::CreateDecryptor (m_EncryptionKeyType, 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<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, int 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);
});
}
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)
{
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 (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 of type for address ", ident, ".b32.i2p");
memset (m_EncryptionPrivateKey, 0, 256);
memset (m_EncryptionPublicKey, 0, 256);
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)
{
std::shared_ptr<i2p::data::LocalLeaseSet> leaseSet;
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_LEASESET)
{
leaseSet = std::make_shared<i2p::data::LocalLeaseSet> (GetIdentity (), m_EncryptionPublicKey, tunnels);
// sign
Sign (leaseSet->GetBuffer (), leaseSet->GetBufferLen () - leaseSet->GetSignatureLen (), leaseSet->GetSignature ());
}
else
{
// standard LS2 (type 3) first
auto keyLen = m_Decryptor ? m_Decryptor->GetPublicKeyLen () : 256;
auto ls2 = std::make_shared<i2p::data::LocalLeaseSet2> (i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2,
m_Keys, m_EncryptionKeyType, keyLen, m_EncryptionPublicKey, tunnels);
if (GetLeaseSetType () == i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2) // encrypt if type 5
ls2 = std::make_shared<i2p::data::LocalEncryptedLeaseSet2> (ls2, m_Keys);
leaseSet = ls2;
}
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;
}
}
}
Reference in New Issue View Git Blame Copy Permalink