void TransitTunnelParticipant::HandleTunnelDataMsg(
std::shared_ptr<const i2p::I2NPMessage> tunnelMsg) {
auto newMsg = CreateEmptyTunnelDataMsg();
EncryptTunnelMsg(tunnelMsg, newMsg);
m_NumTransmittedBytes += tunnelMsg->GetLength();
htobe32buf(newMsg->GetPayload(), GetNextTunnelID());
newMsg->FillI2NPMessageHeader(e_I2NPTunnelData);
m_TunnelDataMsgs.push_back(newMsg);
}
void TransitTunnelParticipant::FlushTunnelDataMsgs ()
{
if (!m_TunnelDataMsgs.empty ())
{
auto num = m_TunnelDataMsgs.size ();
if (num > 1)
LogPrint (eLogDebug, "TransitTunnel: ", GetTunnelID (), "->", GetNextTunnelID (), " ", num);
i2p::transport::transports.SendMessages (GetNextIdentHash (), m_TunnelDataMsgs);
m_TunnelDataMsgs.clear ();
}
}
size_t GarlicRoutingSession::CreateDeliveryStatusClove (uint8_t * buf, uint32_t msgID)
{
size_t size = 0;
if (m_Owner)
{
auto inboundTunnel = m_Owner->GetTunnelPool ()->GetNextInboundTunnel ();
if (inboundTunnel)
{
buf[size] = eGarlicDeliveryTypeTunnel << 5; // delivery instructions flag tunnel
size++;
// hash and tunnelID sequence is reversed for Garlic
memcpy (buf + size, inboundTunnel->GetNextIdentHash (), 32); // To Hash
size += 32;
htobe32buf (buf + size, inboundTunnel->GetNextTunnelID ()); // tunnelID
size += 4;
// create msg
auto msg = CreateDeliveryStatusMsg (msgID);
if (m_Owner)
{
//encrypt
uint8_t key[32], tag[32];
RAND_bytes (key, 32); // random session key
RAND_bytes (tag, 32); // random session tag
m_Owner->SubmitSessionKey (key, tag);
GarlicRoutingSession garlic (key, tag);
msg = garlic.WrapSingleMessage (msg);
}
memcpy (buf + size, msg->GetBuffer (), msg->GetLength ());
size += msg->GetLength ();
// fill clove
uint64_t ts = i2p::util::GetMillisecondsSinceEpoch () + 8000; // 8 sec
uint32_t cloveID;
RAND_bytes ((uint8_t *)&cloveID, 4);
htobe32buf (buf + size, cloveID); // CloveID
size += 4;
htobe64buf (buf + size, ts); // Expiration of clove
size += 8;
memset (buf + size, 0, 3); // certificate of clove
size += 3;
}
else
LogPrint (eLogError, "Garlic: No inbound tunnels in the pool for DeliveryStatus");
}
else
LogPrint (eLogWarning, "Garlic: Missing local LeaseSet");
return size;
}
void TunnelPool::RecreateOutboundTunnel (std::shared_ptr<OutboundTunnel> tunnel)
{
auto inboundTunnel = GetNextInboundTunnel ();
if (!inboundTunnel)
inboundTunnel = tunnels.GetNextInboundTunnel ();
if (inboundTunnel)
{
LogPrint (eLogDebug, "Tunnels: Re-creating destination outbound tunnel...");
auto newTunnel = tunnels.CreateTunnel<OutboundTunnel> (
std::make_shared<TunnelConfig> (tunnel->GetPeers (),
inboundTunnel->GetNextTunnelID (), inboundTunnel->GetNextIdentHash ()));
newTunnel->SetTunnelPool (shared_from_this ());
}
else
LogPrint (eLogDebug, "Tunnels: Can't re-create outbound tunnel, no inbound tunnels found");
}
void TunnelPool::CreateOutboundTunnel ()
{
auto inboundTunnel = GetNextInboundTunnel ();
if (!inboundTunnel)
inboundTunnel = tunnels.GetNextInboundTunnel ();
if (inboundTunnel)
{
LogPrint (eLogDebug, "Tunnels: Creating destination outbound tunnel...");
std::vector<std::shared_ptr<const i2p::data::IdentityEx> > peers;
if (SelectPeers (peers, false))
{
auto tunnel = tunnels.CreateTunnel<OutboundTunnel> (
std::make_shared<TunnelConfig> (peers, inboundTunnel->GetNextTunnelID (), inboundTunnel->GetNextIdentHash ()));
tunnel->SetTunnelPool (shared_from_this ());
}
else
LogPrint (eLogError, "Tunnels: Can't create outbound tunnel, no peers available");
}
else
LogPrint (eLogError, "Tunnels: Can't create outbound tunnel, no inbound tunnels found");
}
