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select maximum SSU2 queue size depending on RTT value

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Vort 2024-03-26 09:41:49 +02:00
parent a30d1972e5
commit ac9d92c681
3 changed files with 23 additions and 12 deletions
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13
libi2pd/I2NPProtocol.h
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@ -152,7 +152,9 @@ namespace tunnel
const size_t I2NP_MAX_MESSAGE_SIZE = 62708;
const size_t I2NP_MAX_SHORT_MESSAGE_SIZE = 4096;
const size_t I2NP_MAX_MEDIUM_MESSAGE_SIZE = 16384;
const unsigned int I2NP_MESSAGE_LOCAL_EXPIRATION_TIMEOUT = 2000000; // in microseconds
const unsigned int I2NP_MESSAGE_LOCAL_EXPIRATION_TIMEOUT_FACTOR = 3; // multiples of RTT
const unsigned int I2NP_MESSAGE_LOCAL_EXPIRATION_TIMEOUT_MIN = 200000; // in microseconds
const unsigned int I2NP_MESSAGE_LOCAL_EXPIRATION_TIMEOUT_MAX = 2000000; // in microseconds
const unsigned int I2NP_MESSAGE_EXPIRATION_TIMEOUT = 8000; // in milliseconds (as initial RTT)
const unsigned int I2NP_MESSAGE_CLOCK_SKEW = 60*1000; // 1 minute in milliseconds
@ -162,10 +164,10 @@ namespace tunnel
size_t len, offset, maxLen;
std::shared_ptr<i2p::tunnel::InboundTunnel> from;
std::function<void ()> onDrop;
uint64_t localExpiration; // monotonic microseconds
uint64_t enqueueTime; // monotonic microseconds
I2NPMessage (): buf (nullptr), len (I2NP_HEADER_SIZE + 2),
offset(2), maxLen (0), from (nullptr), localExpiration(0) {}; // reserve 2 bytes for NTCP header
offset(2), maxLen (0), from (nullptr), enqueueTime (0) {}; // reserve 2 bytes for NTCP header
// header accessors
uint8_t * GetHeader () { return GetBuffer (); };
@ -175,8 +177,9 @@ namespace tunnel
void SetMsgID (uint32_t msgID) { htobe32buf (GetHeader () + I2NP_HEADER_MSGID_OFFSET, msgID); };
uint32_t GetMsgID () const { return bufbe32toh (GetHeader () + I2NP_HEADER_MSGID_OFFSET); };
void SetExpiration (uint64_t expiration) { htobe64buf (GetHeader () + I2NP_HEADER_EXPIRATION_OFFSET, expiration); };
void SetLocalExpiration (uint64_t expiration) { localExpiration = expiration; };
void SetEnqueueTime (uint64_t mts) { enqueueTime = mts; };
uint64_t GetExpiration () const { return bufbe64toh (GetHeader () + I2NP_HEADER_EXPIRATION_OFFSET); };
uint64_t GetEnqueueTime () const { return enqueueTime; };
void SetSize (uint16_t size) { htobe16buf (GetHeader () + I2NP_HEADER_SIZE_OFFSET, size); };
uint16_t GetSize () const { return bufbe16toh (GetHeader () + I2NP_HEADER_SIZE_OFFSET); };
void UpdateSize () { SetSize (GetPayloadLength ()); };
@ -267,8 +270,6 @@ namespace tunnel
void RenewI2NPMessageHeader ();
bool IsExpired () const;
bool IsExpired (uint64_t ts) const; // in milliseconds
bool IsLocalExpired (uint64_t mts) const { return mts > localExpiration; }; // monotonic microseconds
bool IsLocalSemiExpired (uint64_t mts) const { return mts > localExpiration - I2NP_MESSAGE_LOCAL_EXPIRATION_TIMEOUT / 2; }; // monotonic microseconds
void Drop () { if (onDrop) { onDrop (); onDrop = nullptr; }; }
};