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probing resistance

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orignal
2025-05-03 13:09:06 -04:00
parent aece5bb16c
commit 0d278d2ae5
2 changed files with 17 additions and 3 deletions
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libi2pd/NTCP2.cpp
+15 -2
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@@ -528,6 +528,7 @@ namespace transport
}
else
{
m_Establisher->CreateEphemeralKey ();
boost::asio::post (m_Server.GetEstablisherService (),
[s = shared_from_this (), bytes_transferred] ()
{
@@ -566,7 +567,7 @@ namespace transport
SendSessionCreated ();
}
else
boost::asio::post (m_Server.GetService (), std::bind (&NTCP2Session::Terminate, shared_from_this ()));
ReadSomethingAndTerminate (); // probing resistance
}
void NTCP2Session::HandleSessionRequestPaddingReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
@@ -918,7 +919,6 @@ namespace transport
{
SetTerminationTimeout (NTCP2_ESTABLISH_TIMEOUT);
SetLastActivityTimestamp (i2p::util::GetSecondsSinceEpoch ());
m_Establisher->CreateEphemeralKey ();
boost::asio::async_read (m_Socket, boost::asio::buffer(m_Establisher->m_SessionRequestBuffer, 64), boost::asio::transfer_all (),
std::bind(&NTCP2Session::HandleSessionRequestReceived, shared_from_this (),
std::placeholders::_1, std::placeholders::_2));
@@ -1399,6 +1399,19 @@ namespace transport
boost::asio::post (m_Server.GetService (), std::bind (&NTCP2Session::Terminate, shared_from_this ())); // let termination message go
}
void NTCP2Session::ReadSomethingAndTerminate ()
{
size_t len = m_Server.GetRng ()() % NTCP2_SESSION_REQUEST_MAX_SIZE;
if (len > 0 && m_Establisher)
boost::asio::async_read (m_Socket, boost::asio::buffer(m_Establisher->m_SessionRequestBuffer, len), boost::asio::transfer_all (),
[s = shared_from_this()](const boost::system::error_code& ecode, size_t bytes_transferred)
{
s->Terminate ();
});
else
boost::asio::post (m_Server.GetService (), std::bind (&NTCP2Session::Terminate, shared_from_this ()));
}
void NTCP2Session::SendI2NPMessages (std::list<std::shared_ptr<I2NPMessage> >& msgs)
{
if (m_IsTerminated || msgs.empty ())