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Code Issues Releases Activity

allow 0ms latency for tunnel

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This commit is contained in:
Vort 2024-02-25 22:57:57 +02:00
parent 821a76a7c5
commit d6d440ba8a
4 changed files with 18 additions and 15 deletions
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6
libi2pd/Tunnel.cpp
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@ -33,7 +33,7 @@ namespace tunnel
TunnelBase (config->GetTunnelID (), config->GetNextTunnelID (), config->GetNextIdentHash ()),
m_Config (config), m_IsShortBuildMessage (false), m_Pool (nullptr),
m_State (eTunnelStatePending), m_FarEndTransports (i2p::data::RouterInfo::eAllTransports),
m_IsRecreated (false), m_Latency (0)
m_IsRecreated (false), m_Latency (UNKNOWN_LATENCY)
{
}
@ -198,10 +198,10 @@ namespace tunnel
return established;
}
bool Tunnel::LatencyFitsRange(uint64_t lower, uint64_t upper) const
bool Tunnel::LatencyFitsRange(int lowerbound, int upperbound) const
{
auto latency = GetMeanLatency();
return latency >= lower && latency <= upper;
return latency >= lowerbound && latency <= upperbound;
}
void Tunnel::EncryptTunnelMsg (std::shared_ptr<const I2NPMessage> in, std::shared_ptr<I2NPMessage> out)

13
libi2pd/Tunnel.h
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@ -39,6 +39,7 @@ namespace tunnel
const int TUNNEL_CREATION_TIMEOUT = 30; // 30 seconds
const int STANDARD_NUM_RECORDS = 4; // in VariableTunnelBuild message
const int MAX_NUM_RECORDS = 8;
const int UNKNOWN_LATENCY = -1;
const int HIGH_LATENCY_PER_HOP = 250; // in milliseconds
const int MAX_TUNNEL_MSGS_BATCH_SIZE = 100; // handle messages without interrupt
const uint16_t DEFAULT_MAX_NUM_TRANSIT_TUNNELS = 5000;
@ -108,14 +109,14 @@ namespace tunnel
void EncryptTunnelMsg (std::shared_ptr<const I2NPMessage> in, std::shared_ptr<I2NPMessage> out) override;
/** @brief add latency sample */
void AddLatencySample(const uint64_t ms) { m_Latency = (m_Latency + ms) >> 1; }
void AddLatencySample(const int ms) { m_Latency = LatencyIsKnown() ? (m_Latency + ms) >> 1 : ms; }
/** @brief get this tunnel's estimated latency */
uint64_t GetMeanLatency() const { return m_Latency; }
int GetMeanLatency() const { return m_Latency; }
/** @brief return true if this tunnel's latency fits in range [lowerbound, upperbound] */
bool LatencyFitsRange(uint64_t lowerbound, uint64_t upperbound) const;
bool LatencyFitsRange(int lowerbound, int upperbound) const;
bool LatencyIsKnown() const { return m_Latency > 0; }
bool IsSlow () const { return LatencyIsKnown() && (int)m_Latency > HIGH_LATENCY_PER_HOP*GetNumHops (); }
bool LatencyIsKnown() const { return m_Latency != UNKNOWN_LATENCY; }
bool IsSlow () const { return LatencyIsKnown() && m_Latency > HIGH_LATENCY_PER_HOP*GetNumHops (); }
/** visit all hops we currently store */
void VisitTunnelHops(TunnelHopVisitor v);
@ -129,7 +130,7 @@ namespace tunnel
TunnelState m_State;
i2p::data::RouterInfo::CompatibleTransports m_FarEndTransports;
bool m_IsRecreated; // if tunnel is replaced by new, or new tunnel requested to replace
uint64_t m_Latency; // in milliseconds
int m_Latency; // in milliseconds
};
class OutboundTunnel: public Tunnel

8
libi2pd/TunnelPool.cpp
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@ -477,8 +477,10 @@ namespace tunnel
}
if (found)
{
uint64_t dlt = i2p::util::GetMillisecondsSinceEpoch () - timestamp;
int dlt = (int)((int64_t)i2p::util::GetMillisecondsSinceEpoch () - (int64_t)timestamp);
LogPrint (eLogDebug, "Tunnels: Test of ", msgID, " successful. ", dlt, " milliseconds");
if (dlt < 0)
dlt = 0;
int numHops = 0;
if (test.first) numHops += test.first->GetNumHops ();
if (test.second) numHops += test.second->GetNumHops ();
@ -488,7 +490,7 @@ namespace tunnel
if (test.first->GetState () != eTunnelStateExpiring)
test.first->SetState (eTunnelStateEstablished);
// update latency
uint64_t latency = 0;
int latency = 0;
if (numHops) latency = dlt*test.first->GetNumHops ()/numHops;
if (!latency) latency = dlt/2;
test.first->AddLatencySample(latency);
@ -498,7 +500,7 @@ namespace tunnel
if (test.second->GetState () != eTunnelStateExpiring)
test.second->SetState (eTunnelStateEstablished);
// update latency
uint64_t latency = 0;
int latency = 0;
if (numHops) latency = dlt*test.second->GetNumHops ()/numHops;
if (!latency) latency = dlt/2;
test.second->AddLatencySample(latency);

6
libi2pd/TunnelPool.h
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@ -105,7 +105,7 @@ namespace tunnel
bool HasCustomPeerSelector();
/** @brief make this tunnel pool yield tunnels that fit latency range [min, max] */
void RequireLatency(uint64_t min, uint64_t max) { m_MinLatency = min; m_MaxLatency = max; }
void RequireLatency(int min, int max) { m_MinLatency = min; m_MaxLatency = max; }
/** @brief return true if this tunnel pool has a latency requirement */
bool HasLatencyRequirement() const { return m_MinLatency > 0 && m_MaxLatency > 0; }
@ -150,8 +150,8 @@ namespace tunnel
std::mutex m_CustomPeerSelectorMutex;
ITunnelPeerSelector * m_CustomPeerSelector;
uint64_t m_MinLatency = 0; // if > 0 this tunnel pool will try building tunnels with minimum latency by ms
uint64_t m_MaxLatency = 0; // if > 0 this tunnel pool will try building tunnels with maximum latency by ms
int m_MinLatency = 0; // if > 0 this tunnel pool will try building tunnels with minimum latency by ms
int m_MaxLatency = 0; // if > 0 this tunnel pool will try building tunnels with maximum latency by ms
std::random_device m_Rd;
std::mt19937 m_Rng;