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create new list of SSU2 introducers

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orignal 2022-07-19 18:38:58 -04:00
parent 6f7ab49346
commit cf0d3b5f61
5 changed files with 69 additions and 6 deletions
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52
libi2pd/SSU2.cpp
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@ -755,28 +755,68 @@ namespace transport
void SSU2Server::UpdateIntroducers (bool v4)
{
uint32_t ts = i2p::util::GetSecondsSinceEpoch ();
std::list<std::shared_ptr<SSU2Session>> newList;
auto& introducers = v4 ? m_Introducers : m_IntroducersV6;
std::set<i2p::data::IdentHash> excluded;
for (const auto& it : introducers)
{
if (it->IsEstablished ())
{
it->SendKeepAlive ();
newList.push_back (it);
if (ts < it->GetCreationTime () + SSU2_TO_INTRODUCER_SESSION_EXPIRATION)
it->SendKeepAlive ();
if (ts < it->GetCreationTime () + SSU2_TO_INTRODUCER_SESSION_DURATION)
{
newList.push_back (it);
excluded.insert (it->GetRemoteIdentity ()->GetIdentHash ());
}
// TODO: remove introducer
}
}
if (newList.size () < SSU2_MAX_NUM_INTRODUCERS)
{
std::set<i2p::data::IdentHash> excluded;
for (auto& it1: newList)
excluded.insert (it1->GetRemoteIdentity ()->GetIdentHash ());
auto sessions = FindIntroducers (SSU_MAX_NUM_INTRODUCERS - newList.size (), v4, excluded);
auto sessions = FindIntroducers (SSU2_MAX_NUM_INTRODUCERS - newList.size (), v4, excluded);
if (sessions.empty () && !introducers.empty ())
{
// bump creation time for previous introducers if no new sessions found
LogPrint (eLogDebug, "SSU2: No new introducers found. Trying to reuse existing");
for (auto& it : introducers)
it->SetCreationTime (it->GetCreationTime () + SSU2_TO_INTRODUCER_SESSION_DURATION);
// try again
excluded.clear ();
sessions = FindIntroducers (SSU2_MAX_NUM_INTRODUCERS - newList.size (), v4, excluded);
}
for (const auto& it : sessions)
{
// TODO: add introducer
newList.push_back (it);
if (newList.size () >= SSU2_MAX_NUM_INTRODUCERS) break;
}
}
introducers = newList;
if (introducers.size () < SSU2_MAX_NUM_INTRODUCERS)
{
for (auto i = introducers.size (); i < SSU2_MAX_NUM_INTRODUCERS; i++)
{
auto introducer = i2p::data::netdb.GetRandomSSU2Introducer (v4, excluded);
if (introducer)
{
auto address = v4 ? introducer->GetSSU2V4Address () : introducer->GetSSU2V6Address ();
if (address)
{
CreateSession (introducer, address);
excluded.insert (introducer->GetIdentHash ());
}
}
else
{
LogPrint (eLogDebug, "SSU2: Can't find more introducers");
break;
}
}
}
}
}
}