I2P: End-to-End encrypted and anonymous Internet https://i2pd.website/
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#ifndef ROUTER_CONTEXT_H__
#define ROUTER_CONTEXT_H__
#include <inttypes.h>
#include <string>
#include <memory>
#include <mutex>
#include <chrono>
#include <boost/asio.hpp>
#include "Identity.h"
#include "RouterInfo.h"
#include "Garlic.h"
namespace i2p
{
const char ROUTER_INFO[] = "router.info";
const char ROUTER_KEYS[] = "router.keys";
const char NTCP2_KEYS[] = "ntcp2.keys";
const int ROUTER_INFO_UPDATE_INTERVAL = 1800; // 30 minutes
enum RouterStatus
{
eRouterStatusOK = 0,
eRouterStatusTesting = 1,
eRouterStatusFirewalled = 2,
eRouterStatusError = 3
};
enum RouterError
{
eRouterErrorNone = 0,
eRouterErrorClockSkew = 1
};
class RouterContext: public i2p::garlic::GarlicDestination
{
private:
struct NTCP2PrivateKeys
{
uint8_t staticPublicKey[32];
uint8_t staticPrivateKey[32];
uint8_t iv[16];
};
public:
RouterContext ();
void Init ();
const i2p::data::PrivateKeys& GetPrivateKeys () const { return m_Keys; };
i2p::data::RouterInfo& GetRouterInfo () { return m_RouterInfo; };
std::shared_ptr<const i2p::data::RouterInfo> GetSharedRouterInfo () const
{
return std::shared_ptr<const i2p::data::RouterInfo> (&m_RouterInfo,
[](const i2p::data::RouterInfo *) {});
}
std::shared_ptr<i2p::garlic::GarlicDestination> GetSharedDestination ()
{
return std::shared_ptr<i2p::garlic::GarlicDestination> (this,
[](i2p::garlic::GarlicDestination *) {});
}
const uint8_t * GetNTCP2StaticPublicKey () const { return m_NTCP2Keys ? m_NTCP2Keys->staticPublicKey : nullptr; };
const uint8_t * GetNTCP2StaticPrivateKey () const { return m_NTCP2Keys ? m_NTCP2Keys->staticPrivateKey : nullptr; };
const uint8_t * GetNTCP2IV () const { return m_NTCP2Keys ? m_NTCP2Keys->iv : nullptr; };
i2p::crypto::X25519Keys& GetStaticKeys ();
uint32_t GetUptime () const; // in seconds
uint64_t GetLastUpdateTime () const { return m_LastUpdateTime; };
uint64_t GetBandwidthLimit () const { return m_BandwidthLimit; };
uint64_t GetTransitBandwidthLimit () const { return (m_BandwidthLimit*m_ShareRatio)/100LL; };
RouterStatus GetStatus () const { return m_Status; };
void SetStatus (RouterStatus status);
RouterError GetError () const { return m_Error; };
void SetError (RouterError error) { m_Status = eRouterStatusError; m_Error = error; };
int GetNetID () const { return m_NetID; };
void SetNetID (int netID) { m_NetID = netID; };
bool DecryptTunnelBuildRecord (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx) const;
void UpdatePort (int port); // called from Daemon
void UpdateAddress (const boost::asio::ip::address& host); // called from SSU or Daemon
void PublishNTCP2Address (int port, bool publish = true, bool v4only = false);
void UpdateNTCP2Address (bool enable);
void PublishNTCPAddress (bool publish, bool v4only = true);
bool AddIntroducer (const i2p::data::RouterInfo::Introducer& introducer);
void RemoveIntroducer (const boost::asio::ip::udp::endpoint& e);
bool IsUnreachable () const;
void SetUnreachable ();
void SetReachable ();
bool IsFloodfill () const { return m_IsFloodfill; };
void SetFloodfill (bool floodfill);
void SetFamily (const std::string& family);
std::string GetFamily () const;
void SetBandwidth (int limit); /* in kilobytes */
void SetBandwidth (char L); /* by letter */
void SetShareRatio (int percents); // 0 - 100
bool AcceptsTunnels () const { return m_AcceptsTunnels; };
void SetAcceptsTunnels (bool acceptsTunnels) { m_AcceptsTunnels = acceptsTunnels; };
bool SupportsV6 () const { return m_RouterInfo.IsV6 (); };
bool SupportsV4 () const { return m_RouterInfo.IsV4 (); };
void SetSupportsV6 (bool supportsV6);
void SetSupportsV4 (bool supportsV4);
void UpdateNTCP2V6Address (const boost::asio::ip::address& host); // called from Daemon. TODO: remove
void UpdateStats ();
void UpdateTimestamp (uint64_t ts); // in seconds, called from NetDb before publishing
void CleanupDestination (); // garlic destination
// implements LocalDestination
std::shared_ptr<const i2p::data::IdentityEx> GetIdentity () const { return m_Keys.GetPublic (); };
bool Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx) const;
void Sign (const uint8_t * buf, int len, uint8_t * signature) const { m_Keys.Sign (buf, len, signature); };
void SetLeaseSetUpdated () {};
// implements GarlicDestination
std::shared_ptr<const i2p::data::LocalLeaseSet> GetLeaseSet () { return nullptr; };
std::shared_ptr<i2p::tunnel::TunnelPool> GetTunnelPool () const;
void HandleI2NPMessage (const uint8_t * buf, size_t len, std::shared_ptr<i2p::tunnel::InboundTunnel> from);
// override GarlicDestination
void ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg);
void ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg);
private:
void CreateNewRouter ();
void NewRouterInfo ();
void UpdateRouterInfo ();
void NewNTCP2Keys ();
bool Load ();
void SaveKeys ();
private:
i2p::data::RouterInfo m_RouterInfo;
i2p::data::PrivateKeys m_Keys;
std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> m_Decryptor;
uint64_t m_LastUpdateTime; // in seconds
bool m_AcceptsTunnels, m_IsFloodfill;
#ifdef WIN32
uint64_t m_StartupTime = 0; // in seconds since epoch
#else
std::chrono::time_point<std::chrono::steady_clock> m_StartupTime;
#endif
uint64_t m_BandwidthLimit; // allowed bandwidth
int m_ShareRatio;
RouterStatus m_Status;
RouterError m_Error;
int m_NetID;
std::mutex m_GarlicMutex;
std::unique_ptr<NTCP2PrivateKeys> m_NTCP2Keys;
std::unique_ptr<i2p::crypto::X25519Keys> m_StaticKeys;
};
extern RouterContext context;
}
#endif