I2P: End-to-End encrypted and anonymous Internet https://i2pd.website/
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#ifndef TUNNEL_GATEWAY_H__
#define TUNNEL_GATEWAY_H__
#include <inttypes.h>
#include <vector>
#include "I2NPProtocol.h"
#include "TunnelBase.h"
namespace i2p
{
namespace tunnel
{
class TunnelGatewayBuffer
{
struct TunnelMessageBlockExt: public TunnelMessageBlock
{
size_t deliveryInstructionsLen, totalLen;
bool isFragmented;
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};
public:
TunnelGatewayBuffer (uint32_t tunnelID): m_TunnelID (tunnelID), m_Remaining (0) {};
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void PutI2NPMsg (const uint8_t * gwHash, uint32_t gwTunnel, I2NPMessage * msg);
std::vector<I2NPMessage *> GetTunnelDataMsgs ();
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private:
size_t CreateFirstFragment (TunnelMessageBlockExt * block, uint8_t * buf, size_t len);
size_t CreateFollowOnFragment (TunnelMessageBlockExt * block, uint8_t * buf, size_t len);
I2NPMessage * CreateNextTunnelMessage (int& ind);
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private:
uint32_t m_TunnelID;
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std::vector<TunnelMessageBlockExt *> m_I2NPMsgs;
// for fragmented messages
size_t m_NextOffset, m_NextSeqn, m_Remaining;
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uint32_t m_NextMsgID;
};
class TunnelGateway
{
public:
TunnelGateway (TunnelBase * tunnel):
m_Tunnel (tunnel), m_Buffer (tunnel->GetNextTunnelID ()), m_NumSentBytes (0) {};
void SendTunnelDataMsg (const uint8_t * gwHash, uint32_t gwTunnel, i2p::I2NPMessage * msg);
void PutTunnelDataMsg (const uint8_t * gwHash, uint32_t gwTunnel, i2p::I2NPMessage * msg);
void SendBuffer ();
size_t GetNumSentBytes () const { return m_NumSentBytes; };
private:
TunnelBase * m_Tunnel;
TunnelGatewayBuffer m_Buffer;
size_t m_NumSentBytes;
};
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}
}
#endif