void HandleI2NPMessage (std::shared_ptr<I2NPMessage> msg)
{
if (msg)
{
uint8_t typeID = msg->GetTypeID ();
LogPrint (eLogDebug, "I2NP: Handling message with type ", (int)typeID);
switch (typeID)
{
case eI2NPTunnelData:
i2p::tunnel::tunnels.PostTunnelData (msg);
break;
case eI2NPTunnelGateway:
i2p::tunnel::tunnels.PostTunnelData (msg);
break;
case eI2NPGarlic:
{
if (msg->from)
{
if (msg->from->GetTunnelPool ())
msg->from->GetTunnelPool ()->ProcessGarlicMessage (msg);
else
LogPrint (eLogInfo, "I2NP: Local destination for garlic doesn't exist anymore");
}
else
i2p::context.ProcessGarlicMessage (msg);
break;
}
case eI2NPDatabaseStore:
case eI2NPDatabaseSearchReply:
case eI2NPDatabaseLookup:
// forward to netDb
i2p::data::netdb.PostI2NPMsg (msg);
break;
case eI2NPDeliveryStatus:
{
if (msg->from && msg->from->GetTunnelPool ())
msg->from->GetTunnelPool ()->ProcessDeliveryStatus (msg);
else
i2p::context.ProcessDeliveryStatusMessage (msg);
break;
}
case eI2NPVariableTunnelBuild:
case eI2NPVariableTunnelBuildReply:
case eI2NPTunnelBuild:
case eI2NPTunnelBuildReply:
// forward to tunnel thread
i2p::tunnel::tunnels.PostTunnelData (msg);
break;
default:
HandleI2NPMessage (msg->GetBuffer (), msg->GetLength ());
}
}
}
void I2NPMessagesHandler::PutNextMessage (std::shared_ptr<I2NPMessage> msg)
{
if (msg)
{
switch (msg->GetTypeID ())
{
case eI2NPTunnelData:
m_TunnelMsgs.push_back (msg);
break;
case eI2NPTunnelGateway:
m_TunnelGatewayMsgs.push_back (msg);
break;
default:
HandleI2NPMessage (msg);
}
}
}
void HandleI2NPMessage (I2NPMessage * msg)
{
if (msg)
{
switch (msg->GetHeader ()->typeID)
{
case eI2NPTunnelData:
LogPrint ("TunnelData");
i2p::tunnel::tunnels.PostTunnelData (msg);
break;
case eI2NPTunnelGateway:
LogPrint ("TunnelGateway");
HandleTunnelGatewayMsg (msg);
break;
case eI2NPGarlic:
LogPrint ("Garlic");
if (msg->from && msg->from->GetTunnelPool ())
msg->from->GetTunnelPool ()->GetLocalDestination ().ProcessGarlicMessage (msg);
else
i2p::context.ProcessGarlicMessage (msg);
break;
case eI2NPDatabaseStore:
case eI2NPDatabaseSearchReply:
case eI2NPDatabaseLookup:
// forward to netDb
i2p::data::netdb.PostI2NPMsg (msg);
break;
case eI2NPDeliveryStatus:
LogPrint ("DeliveryStatus");
if (msg->from && msg->from->GetTunnelPool ())
msg->from->GetTunnelPool ()->ProcessDeliveryStatus (msg);
else
i2p::context.ProcessDeliveryStatusMessage (msg);
break;
default:
HandleI2NPMessage (msg->GetBuffer (), msg->GetLength ());
DeleteI2NPMessage (msg);
}
}
}
void GarlicDestination::HandleGarlicPayload (uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from)
{
if (len < 1)
{
LogPrint (eLogError, "Garlic: payload is too short");
return;
}
int numCloves = buf[0];
LogPrint (eLogDebug, "Garlic: ", numCloves," cloves");
buf++; len--;
for (int i = 0; i < numCloves; i++)
{
const uint8_t * buf1 = buf;
// delivery instructions
uint8_t flag = buf[0];
buf++; // flag
if (flag & 0x80) // encrypted?
{
// TODO: implement
LogPrint (eLogWarning, "Garlic: clove encrypted");
buf += 32;
}
ptrdiff_t offset = buf - buf1;
GarlicDeliveryType deliveryType = (GarlicDeliveryType)((flag >> 5) & 0x03);
switch (deliveryType)
{
case eGarlicDeliveryTypeLocal:
LogPrint (eLogDebug, "Garlic: type local");
if (offset > (int)len)
{
LogPrint (eLogError, "Garlic: message is too short");
break;
}
HandleI2NPMessage (buf, len - offset, from);
break;
case eGarlicDeliveryTypeDestination:
LogPrint (eLogDebug, "Garlic: type destination");
buf += 32; // destination. check it later or for multiple destinations
offset = buf - buf1;
if (offset > (int)len)
{
LogPrint (eLogError, "Garlic: message is too short");
break;
}
HandleI2NPMessage (buf, len - offset, from);
break;
case eGarlicDeliveryTypeTunnel:
{
LogPrint (eLogDebug, "Garlic: type tunnel");
// gwHash and gwTunnel sequence is reverted
uint8_t * gwHash = buf;
buf += 32;
offset = buf - buf1;
if (offset + 4 > (int)len)
{
LogPrint (eLogError, "Garlic: message is too short");
break;
}
uint32_t gwTunnel = bufbe32toh (buf);
buf += 4; offset += 4;
auto msg = CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len - offset), from);
if (from) // received through an inbound tunnel
{
std::shared_ptr<i2p::tunnel::OutboundTunnel> tunnel;
if (from->GetTunnelPool ())
tunnel = from->GetTunnelPool ()->GetNextOutboundTunnel ();
else
LogPrint (eLogError, "Garlic: Tunnel pool is not set for inbound tunnel");
if (tunnel) // we have send it through an outbound tunnel
tunnel->SendTunnelDataMsg (gwHash, gwTunnel, msg);
else
LogPrint (eLogWarning, "Garlic: No outbound tunnels available for garlic clove");
}
else // received directly
i2p::transport::transports.SendMessage (gwHash, i2p::CreateTunnelGatewayMsg (gwTunnel, msg)); // send directly
break;
}
case eGarlicDeliveryTypeRouter:
{
uint8_t * ident = buf;
buf += 32;
offset = buf - buf1;
if (!from) // received directly
{
if (offset > (int)len)
{
LogPrint (eLogError, "Garlic: message is too short");
break;
}
i2p::transport::transports.SendMessage (ident,
CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len - offset)));
}
else
LogPrint (eLogWarning, "Garlic: type router for inbound tunnels not supported");
break;
}
default:
LogPrint (eLogWarning, "Garlic: unknown delivery type ", (int)deliveryType);
}
if (offset > (int)len)
{
LogPrint (eLogError, "Garlic: message is too short");
break;
}
buf += GetI2NPMessageLength (buf, len - offset); // I2NP
buf += 4; // CloveID
buf += 8; // Date
buf += 3; // Certificate
offset = buf - buf1;
if (offset > (int)len)
{
LogPrint (eLogError, "Garlic: clove is too long");
break;
}
len -= offset;
}
}
void GarlicDestination::HandleGarlicPayload (uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from)
{
const uint8_t * buf1 = buf;
int numCloves = buf[0];
LogPrint (eLogDebug, "Garlic: ", numCloves," cloves");
buf++;
for (int i = 0; i < numCloves; i++)
{
// delivery instructions
uint8_t flag = buf[0];
buf++; // flag
if (flag & 0x80) // encrypted?
{
// TODO: implement
LogPrint (eLogWarning, "Garlic: clove encrypted");
buf += 32;
}
GarlicDeliveryType deliveryType = (GarlicDeliveryType)((flag >> 5) & 0x03);
switch (deliveryType)
{
case eGarlicDeliveryTypeLocal:
LogPrint (eLogDebug, "Garlic: type local");
HandleI2NPMessage (buf, len, from);
break;
case eGarlicDeliveryTypeDestination:
LogPrint (eLogDebug, "Garlic: type destination");
buf += 32; // destination. check it later or for multiple destinations
HandleI2NPMessage (buf, len, from);
break;
case eGarlicDeliveryTypeTunnel:
{
LogPrint (eLogDebug, "Garlic: type tunnel");
// gwHash and gwTunnel sequence is reverted
uint8_t * gwHash = buf;
buf += 32;
uint32_t gwTunnel = bufbe32toh (buf);
buf += 4;
std::shared_ptr<i2p::tunnel::OutboundTunnel> tunnel;
if (from && from->GetTunnelPool ())
tunnel = from->GetTunnelPool ()->GetNextOutboundTunnel ();
if (tunnel) // we have send it through an outbound tunnel
{
auto msg = CreateI2NPMessage (buf, GetI2NPMessageLength (buf), from);
tunnel->SendTunnelDataMsg (gwHash, gwTunnel, msg);
}
else
LogPrint (eLogWarning, "Garlic: No outbound tunnels available for garlic clove");
break;
}
case eGarlicDeliveryTypeRouter:
LogPrint (eLogWarning, "Garlic: type router not supported");
buf += 32;
break;
default:
LogPrint (eLogWarning, "Garlic: unknown delivery type ", (int)deliveryType);
}
buf += GetI2NPMessageLength (buf); // I2NP
buf += 4; // CloveID
buf += 8; // Date
buf += 3; // Certificate
if (buf - buf1 > (int)len)
{
LogPrint (eLogError, "Garlic: clove is too long");
break;
}
}
}