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Packet Demod: bound HDLC state outside frames

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Codex
2026-10-04 16:50:44 +03:00
committed by Delfer
parent 95c0622a69
commit b5cf557d91
1 changed files with 9 additions and 1 deletions
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plugins/channelrx/demodpacket/packetdemodframer.h
+9 -1
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@@ -234,7 +234,7 @@ private:
if (bit == 1)
{
d.m_onesCount++;
d.m_onesCount = std::min(d.m_onesCount + 1, 7);
// Shouldn't ever get 7 1s in a row
if ((d.m_onesCount == 7) && d.m_gotSOP)
@@ -288,6 +288,14 @@ private:
d.m_bits = 0;
d.m_bitCount = 0;
}
// Outside a frame only the run-of-ones detector is needed to find a flag.
// Do not let m_bitCount grow without bound before acquisition or after an
// abort: shifting by >= 32 above is undefined (caught by the IQ tests).
if (!d.m_gotSOP)
{
d.m_bits = 0;
d.m_bitCount = 0;
}
}
// True if the assembled bytes carry a matching CRC, in which case packet is the frame