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created additional ranges if acnt > 255

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orignal 2022-07-17 15:22:41 -04:00
parent 206c068d8e
commit ffab29890b
1 changed files with 23 additions and 2 deletions
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25
libi2pd/SSU2Session.cpp
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@ -2008,7 +2008,7 @@ namespace transport
buf[0] = eSSU2BlkAck;
uint32_t ackThrough = m_OutOfSequencePackets.empty () ? m_ReceivePacketNum : *m_OutOfSequencePackets.rbegin ();
htobe32buf (buf + 3, ackThrough); // Ack Through
uint8_t acnt = 0;
uint16_t acnt = 0;
int numRanges = 0;
if (ackThrough)
{
@ -2024,6 +2024,27 @@ namespace transport
}
// ranges
uint32_t lastNum = ackThrough - acnt;
if (acnt > 255)
{
auto d = std::div (acnt - 255, 255);
acnt = 255;
if (d.quot > SSU2_MAX_NUM_ACK_RANGES)
{
d.quot = SSU2_MAX_NUM_ACK_RANGES;
d.rem = 0;
}
// Acks only ragnes for acnt
for (int i = 0; i < d.quot; i++)
{
buf[8 + numRanges*2] = 0; buf[8 + numRanges*2 + 1] = 255; // NACKs 0, Acks 255
numRanges++;
}
if (d.rem > 0)
{
buf[8 + numRanges*2] = 0; buf[8 + numRanges*2 + 1] = d.rem;
numRanges++;
}
}
while (it != m_OutOfSequencePackets.rend () && numRanges < SSU2_MAX_NUM_ACK_RANGES)
{
if (lastNum - (*it) > 255)
@ -2073,7 +2094,7 @@ namespace transport
}
}
}
buf[7] = acnt; // acnt
buf[7] = (uint8_t)acnt; // acnt
htobe16buf (buf + 1, 5 + numRanges*2);
return 8 + numRanges*2;
}