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correct values for last ack range

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orignal 2022-06-12 16:54:02 -04:00
parent f7b6db5dad
commit b72d1237d2
1 changed files with 12 additions and 7 deletions
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19
libi2pd/SSU2Session.cpp
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@ -1607,14 +1607,14 @@ namespace transport
}
// ranges
uint32_t lastNum = ackThrough - acnt;
while (it != m_OutOfSequencePackets.rend () && lastNum > m_ReceivePacketNum && numRanges < SSU2_MAX_NUM_ACK_RANGES)
while (it != m_OutOfSequencePackets.rend () && numRanges < SSU2_MAX_NUM_ACK_RANGES)
{
if (lastNum - (*it) < 255)
{
buf[7 + numRanges*2] = lastNum - (*it) - 1; // NACKs
lastNum = *it; it++;
uint8_t numAcks = 1;
while (it != m_OutOfSequencePackets.rend () && numAcks < 255 && lastNum > m_ReceivePacketNum && *it == lastNum - 1)
while (it != m_OutOfSequencePackets.rend () && numAcks < 255 && lastNum > 0 && *it == lastNum - 1)
{
numAcks++; lastNum--;
it++;
@ -1626,12 +1626,17 @@ namespace transport
else
break;
}
if (numRanges < SSU2_MAX_NUM_ACK_RANGES && m_ReceivePacketNum)
if (numRanges < SSU2_MAX_NUM_ACK_RANGES && it == m_OutOfSequencePackets.rend ())
{
// add received packets to last range
int numAcks = buf[7 + numRanges*2 + 1] + m_ReceivePacketNum;
if (numAcks > 255) numAcks = 255;
buf[7 + numRanges*2 + 1] = numAcks;
// add range between out-of-seqence and received
int nacks = *m_OutOfSequencePackets.begin () - m_ReceivePacketNum - 1;
if (nacks > 0)
{
if (nacks > 255) nacks = 255;
buf[7 + numRanges*2] = nacks;
buf[7 + numRanges*2 + 1] = std::min ((int)m_ReceivePacketNum, 255);
numRanges++;
}
}
}
}