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don't adjust clock if offsets came from same router

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orignal 2024-01-24 19:05:38 -05:00
parent c5a1806528
commit 70639f1139
3 changed files with 26 additions and 12 deletions
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29
libi2pd/SSU2.cpp
View File

@ -210,27 +210,40 @@ namespace transport
return ep.port ();
}
void SSU2Server::AdjustTimeOffset (int64_t offset)
void SSU2Server::AdjustTimeOffset (int64_t offset, std::shared_ptr<const i2p::data::IdentityEx> from)
{
if (offset)
{
if (m_PendingTimeOffset) // one more
{
if (std::abs (m_PendingTimeOffset - offset) < SSU2_CLOCK_SKEW)
if (m_PendingTimeOffsetFrom && from &&
m_PendingTimeOffsetFrom->GetIdentHash ().GetLL()[0] != from->GetIdentHash ().GetLL()[0]) // from different routers
{
offset = (m_PendingTimeOffset + offset)/2; // average
LogPrint (eLogWarning, "SSU2: Clock adjusted by ", offset, " seconds");
i2p::util::AdjustTimeOffset (offset);
}
if (std::abs (m_PendingTimeOffset - offset) < SSU2_CLOCK_SKEW)
{
offset = (m_PendingTimeOffset + offset)/2; // average
LogPrint (eLogWarning, "SSU2: Clock adjusted by ", offset, " seconds");
i2p::util::AdjustTimeOffset (offset);
}
else
LogPrint (eLogWarning, "SSU2: Time offsets are too different. Clock not adjusted");
m_PendingTimeOffset = 0;
m_PendingTimeOffsetFrom = nullptr;
}
else
LogPrint (eLogWarning, "SSU2: Time offsets are too different. Clock not adjusted");
m_PendingTimeOffset = 0;
LogPrint (eLogWarning, "SSU2: Time offsets from same router. Clock not adjusted");
}
else
{
m_PendingTimeOffset = offset; // first
m_PendingTimeOffsetFrom = from;
}
}
else
{
m_PendingTimeOffset = 0; // reset
m_PendingTimeOffsetFrom = nullptr;
}
}
boost::asio::ip::udp::socket& SSU2Server::OpenSocket (const boost::asio::ip::udp::endpoint& localEndpoint)

3
libi2pd/SSU2.h
View File

@ -67,7 +67,7 @@ namespace transport
bool IsSupported (const boost::asio::ip::address& addr) const;
uint16_t GetPort (bool v4) const;
bool IsSyncClockFromPeers () const { return m_IsSyncClockFromPeers; };
void AdjustTimeOffset (int64_t offset);
void AdjustTimeOffset (int64_t offset, std::shared_ptr<const i2p::data::IdentityEx> from);
void AddSession (std::shared_ptr<SSU2Session> session);
void RemoveSession (uint64_t connID);
@ -164,6 +164,7 @@ namespace transport
bool m_IsPublished; // if we maintain introducers
bool m_IsSyncClockFromPeers;
int64_t m_PendingTimeOffset; // during peer test
std::shared_ptr<const i2p::data::IdentityEx> m_PendingTimeOffsetFrom;
// proxy
bool m_IsThroughProxy;

6
libi2pd/SSU2Session.cpp
View File

@ -1671,10 +1671,10 @@ namespace transport
if (std::abs (offset) > SSU2_CLOCK_THRESHOLD)
{
LogPrint (eLogWarning, "SSU2: Time offset ", offset, " from ", m_RemoteEndpoint);
m_Server.AdjustTimeOffset (-offset);
m_Server.AdjustTimeOffset (-offset, GetRemoteIdentity ());
}
else
m_Server.AdjustTimeOffset (0);
m_Server.AdjustTimeOffset (0, nullptr);
}
else if (std::abs (offset) > SSU2_CLOCK_SKEW)
{
@ -2485,7 +2485,7 @@ namespace transport
i2p::context.SetTestingV6 (testing);
}
if (!testing)
m_Server.AdjustTimeOffset (0); // reset time offset when testing is over
m_Server.AdjustTimeOffset (0, nullptr); // reset time offset when testing is over
}
size_t SSU2Session::CreateAddressBlock (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& ep)