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resend HolePunch 3 times or until SessionRequest received

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orignal 2024-10-16 13:10:21 -04:00
parent 4f73f60e51
commit 50d9252ba9
2 changed files with 40 additions and 1 deletions
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32
libi2pd/SSU2OutOfSession.cpp
View File

@ -229,7 +229,7 @@ namespace transport
const boost::asio::ip::udp::endpoint& remoteEndpoint,
std::shared_ptr<const i2p::data::RouterInfo::Address> addr):
SSU2Session (server), // we create full incoming session
m_Nonce (nonce)
m_Nonce (nonce), m_NumResends (0), m_HolePunchResendTimer (server.GetService ())
{
// we are Charlie
uint64_t destConnID = htobe64 (((uint64_t)nonce << 32) | nonce); // dest id
@ -295,6 +295,36 @@ namespace transport
memcpy (m_RelayResponseBlock.data (), relayResponseBlock, relayResponseBlockLen);
#endif
SendHolePunch ();
ScheduleResend ();
}
void SSU2HolePunchSession::ScheduleResend ()
{
if (m_NumResends < SSU2_HOLE_PUNCH_MAX_NUM_RESENDS)
{
m_HolePunchResendTimer.expires_from_now (boost::posix_time::milliseconds(
SSU2_HOLE_PUNCH_RESEND_INTERVAL + GetServer ().GetRng ()() % SSU2_HOLE_PUNCH_RESEND_INTERVAL_VARIANCE));
std::weak_ptr<SSU2HolePunchSession> s(std::static_pointer_cast<SSU2HolePunchSession>(shared_from_this ()));
m_HolePunchResendTimer.async_wait ([s](const boost::system::error_code& ecode)
{
if (ecode != boost::asio::error::operation_aborted)
{
auto s1 = s.lock ();
if (s1 && s1->GetState () == eSSU2SessionStateHolePunch)
{
s1->SendHolePunch ();
s1->ScheduleResend ();
}
}
});
m_NumResends++;
}
}
bool SSU2HolePunchSession::ProcessFirstIncomingMessage (uint64_t connID, uint8_t * buf, size_t len)
{
m_HolePunchResendTimer.cancel ();
return SSU2Session::ProcessFirstIncomingMessage (connID, buf, len);
}
}
}

9
libi2pd/SSU2OutOfSession.h
View File

@ -52,6 +52,10 @@ namespace transport
boost::asio::deadline_timer m_PeerTestResendTimer;
};
const int SSU2_HOLE_PUNCH_RESEND_INTERVAL = 1000; // in milliseconds
const int SSU2_HOLE_PUNCH_RESEND_INTERVAL_VARIANCE = 500; // in milliseconds
const int SSU2_HOLE_PUNCH_MAX_NUM_RESENDS = 3;
class SSU2HolePunchSession: public SSU2Session // Charlie
{
public:
@ -61,14 +65,19 @@ namespace transport
void SendHolePunch (const uint8_t * relayResponseBlock, size_t relayResponseBlockLen);
bool ProcessFirstIncomingMessage (uint64_t connID, uint8_t * buf, size_t len) override; // SessionRequest
private:
void SendHolePunch ();
void ScheduleResend ();
private:
uint32_t m_Nonce;
int m_NumResends;
std::vector<uint8_t> m_RelayResponseBlock;
boost::asio::deadline_timer m_HolePunchResendTimer;
};
}
}