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check out of sequence messages range

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orignal 2022-07-11 18:16:05 -04:00
parent efbaf02016
commit c50e453af6
1 changed files with 22 additions and 17 deletions
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39
libi2pd/SSU2Session.cpp
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@ -1174,7 +1174,7 @@ namespace transport
m_IsDataReceived = true;
break;
case eSSU2BlkTermination:
LogPrint (eLogDebug, "SSU2: Termination");
LogPrint (eLogDebug, "SSU2: Termination reason=", (int)buf[11]);
Terminate ();
break;
case eSSU2BlkRelayRequest:
@ -2210,23 +2210,28 @@ namespace transport
else
++it;
}
if (m_OutOfSequencePackets.size () > 255)
{
m_ReceivePacketNum = *m_OutOfSequencePackets.rbegin ();
m_OutOfSequencePackets.clear ();
}
else if (m_OutOfSequencePackets.size () > SSU2_MAX_NUM_ACK_RANGES)
{
uint32_t packet = *m_OutOfSequencePackets.begin ();
if (packet > m_ReceivePacketNum + 1)
if (!m_OutOfSequencePackets.empty ())
{
if (m_OutOfSequencePackets.size () > 2*SSU2_MAX_NUM_ACK_RANGES ||
*m_OutOfSequencePackets.rbegin () > m_ReceivePacketNum + 255*8)
{
// like we've just received all packets before first
packet--;
m_ReceivePacketNum = packet - 1;
UpdateReceivePacketNum (packet);
}
else
LogPrint (eLogError, "SSU2: Out of sequence packet ", packet, " is less than last received ", m_ReceivePacketNum);
uint32_t packet = *m_OutOfSequencePackets.begin ();
if (packet > m_ReceivePacketNum + 1)
{
// like we've just received all packets before first
packet--;
m_ReceivePacketNum = packet - 1;
UpdateReceivePacketNum (packet);
}
else
LogPrint (eLogError, "SSU2: Out of sequence packet ", packet, " is less than last received ", m_ReceivePacketNum);
}
if (m_OutOfSequencePackets.size () > 255*4)
{
// seems we have a serious network issue
m_ReceivePacketNum = *m_OutOfSequencePackets.rbegin ();
m_OutOfSequencePackets.clear ();
}
}
for (auto it = m_RelaySessions.begin (); it != m_RelaySessions.end ();)