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periodic sending ack requests in ECEISX25519 session and dead path detection in I2CP

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orignal 2024-08-15 13:35:51 -04:00
parent 09dbe9fc03
commit d47ae3012a
3 changed files with 66 additions and 18 deletions
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18
libi2pd/ECIESX25519AEADRatchetSession.h
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@ -30,7 +30,9 @@ namespace garlic
const int ECIESX25519_SEND_INACTIVITY_TIMEOUT = 5000; // number of milliseconds we can send empty(pyaload only) packet after
const int ECIESX25519_SEND_EXPIRATION_TIMEOUT = 480; // in seconds
const int ECIESX25519_RECEIVE_EXPIRATION_TIMEOUT = 600; // in seconds
const int ECIESX25519_PREVIOUS_TAGSET_EXPIRATION_TIMEOUT = 180; // 180
const int ECIESX25519_PREVIOUS_TAGSET_EXPIRATION_TIMEOUT = 180; // in seconds
const int ECIESX25519_ACK_REQUEST_INTERVAL = 33000; // in milliseconds
const int ECIESX25519_ACK_REQUEST_MAX_NUM_ATTEMPTS = 3;
const int ECIESX25519_TAGSET_MAX_NUM_TAGS = 8192; // number of tags we request new tagset after
const int ECIESX25519_MIN_NUM_GENERATED_TAGS = 24;
const int ECIESX25519_MAX_NUM_GENERATED_TAGS = 320;
@ -57,6 +59,8 @@ namespace garlic
int GetTagSetID () const { return m_TagSetID; };
void SetTagSetID (int tagsetID) { m_TagSetID = tagsetID; };
uint32_t GetMsgID () const { return (m_TagSetID << 16) + m_NextIndex; }; // (tagsetid << 16) + N
private:
i2p::data::Tag<64> m_SessionTagKeyData;
@ -178,14 +182,16 @@ namespace garlic
bool IsReadyToSend () const { return m_State != eSessionStateNewSessionSent; };
bool IsTerminated () const { return m_IsTerminated; }
uint64_t GetLastActivityTimestamp () const { return m_LastActivityTimestamp; };
bool CleanupUnconfirmedTags (); // return true if unaswered Ack requests, called from I2CP
protected:
i2p::crypto::NoiseSymmetricState& GetNoiseState () { return *this; };
void SetNoiseState (const i2p::crypto::NoiseSymmetricState& state) { GetNoiseState () = state; };
void CreateNonce (uint64_t seqn, uint8_t * nonce);
void HandlePayload (const uint8_t * buf, size_t len, const std::shared_ptr<ReceiveRatchetTagSet>& receiveTagset, int index);
bool MessageConfirmed (uint32_t msgID);
private:
bool GenerateEphemeralKeysAndEncode (uint8_t * buf); // buf is 32 bytes
@ -219,11 +225,15 @@ namespace garlic
m_LastSentTimestamp = 0; // in milliseconds
std::shared_ptr<RatchetTagSet> m_SendTagset, m_NSRSendTagset;
std::unique_ptr<i2p::data::IdentHash> m_Destination;// TODO: might not need it
std::list<std::pair<uint16_t, int> > m_AckRequests; // (tagsetid, index)
std::list<std::pair<uint16_t, int> > m_AckRequests; // incoming (tagsetid, index)
bool m_SendReverseKey = false, m_SendForwardKey = false, m_IsTerminated = false;
std::unique_ptr<DHRatchet> m_NextReceiveRatchet, m_NextSendRatchet;
uint8_t m_PaddingSizes[32], m_NextPaddingSize;
uint64_t m_LastAckRequestSendTime = 0; // milliseconds
uint32_t m_AckRequestMsgID = 0;
int m_AckRequestNumAttempts = 0;
public:
// for HTTP only