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107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
#include <string.h>
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#include "I2PEndian.h"
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#include "Log.h"
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#include "RouterContext.h"
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#include "I2NPProtocol.h"
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#include "Tunnel.h"
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#include "Transports.h"
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#include "TransitTunnel.h"
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namespace i2p
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{
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namespace tunnel
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{
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TransitTunnel::TransitTunnel (uint32_t receiveTunnelID,
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const uint8_t * nextIdent, uint32_t nextTunnelID,
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const uint8_t * layerKey,const uint8_t * ivKey):
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m_TunnelID (receiveTunnelID), m_NextTunnelID (nextTunnelID),
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m_NextIdent (nextIdent)
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{
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m_Encryption.SetKeys (layerKey, ivKey);
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}
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void TransitTunnel::EncryptTunnelMsg (I2NPMessage * tunnelMsg)
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{
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m_Encryption.Encrypt (tunnelMsg->GetPayload () + 4);
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}
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TransitTunnelParticipant::~TransitTunnelParticipant ()
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{
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for (auto it: m_TunnelDataMsgs)
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i2p::DeleteI2NPMessage (it);
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}
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void TransitTunnelParticipant::HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg)
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{
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EncryptTunnelMsg (tunnelMsg);
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LogPrint (eLogDebug, "TransitTunnel: ",GetTunnelID (),"->", GetNextTunnelID ());
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m_NumTransmittedBytes += tunnelMsg->GetLength ();
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htobe32buf (tunnelMsg->GetPayload (), GetNextTunnelID ());
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FillI2NPMessageHeader (tunnelMsg, eI2NPTunnelData);
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m_TunnelDataMsgs.push_back (tunnelMsg);
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}
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void TransitTunnelParticipant::FlushTunnelDataMsgs ()
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{
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LogPrint (eLogDebug, "TransitTunnel: flush");
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if (!m_TunnelDataMsgs.empty ())
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{
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i2p::transport::transports.SendMessages (GetNextIdentHash (), m_TunnelDataMsgs);
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m_TunnelDataMsgs.clear ();
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}
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}
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void TransitTunnel::SendTunnelDataMsg (i2p::I2NPMessage * msg)
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{
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LogPrint (eLogError, "We are not a gateway for transit tunnel ", m_TunnelID);
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i2p::DeleteI2NPMessage (msg);
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}
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void TransitTunnel::HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg)
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{
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LogPrint (eLogError, "Incoming tunnel message is not supported ", m_TunnelID);
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DeleteI2NPMessage (tunnelMsg);
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}
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void TransitTunnelGateway::SendTunnelDataMsg (i2p::I2NPMessage * msg)
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{
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TunnelMessageBlock block;
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block.deliveryType = eDeliveryTypeLocal;
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block.data = msg;
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std::unique_lock<std::mutex> l(m_SendMutex);
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m_Gateway.SendTunnelDataMsg (block);
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}
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void TransitTunnelEndpoint::HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg)
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{
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EncryptTunnelMsg (tunnelMsg);
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LogPrint (eLogDebug, "TransitTunnel endpoint for ", GetTunnelID ());
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m_Endpoint.HandleDecryptedTunnelDataMsg (tunnelMsg);
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}
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TransitTunnel * CreateTransitTunnel (uint32_t receiveTunnelID,
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const uint8_t * nextIdent, uint32_t nextTunnelID,
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const uint8_t * layerKey,const uint8_t * ivKey,
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bool isGateway, bool isEndpoint)
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{
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if (isEndpoint)
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{
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LogPrint (eLogInfo, "TransitTunnel endpoint: ", receiveTunnelID, " created");
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return new TransitTunnelEndpoint (receiveTunnelID, nextIdent, nextTunnelID, layerKey, ivKey);
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}
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else if (isGateway)
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{
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LogPrint (eLogInfo, "TransitTunnel gateway: ", receiveTunnelID, " created");
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return new TransitTunnelGateway (receiveTunnelID, nextIdent, nextTunnelID, layerKey, ivKey);
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}
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else
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{
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LogPrint (eLogInfo, "TransitTunnel: ", receiveTunnelID, "->", nextTunnelID, " created");
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return new TransitTunnelParticipant (receiveTunnelID, nextIdent, nextTunnelID, layerKey, ivKey);
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}
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}
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}
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}
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