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Fix the CCITT16 checksums for CSBK, DMR Data and D-Star Headers.

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This commit is contained in:
Jonathan Naylor
2016-02-18 21:56:26 +00:00
parent 9a3fe18e91
commit 63aa53c705
8 changed files with 96 additions and 56 deletions
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13
DStarSlowData.cpp
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@@ -82,18 +82,11 @@ CDStarHeader* CDStarSlowData::add(const unsigned char* data)
for (unsigned int i = 3U; i < 39U; i++)
m_header[i] &= 0x7FU;
// Save the CRC for later comparison
unsigned char crc[2U];
::memcpy(crc, m_header + 39U, 2U);
// Add the new CRC
CCRC::addCCITT16(m_header, DSTAR_HEADER_LENGTH_BYTES);
// Compare them
if (::memcmp(crc, m_header + 39U, 2U) != 0) {
// Check the CRC
bool ret = CCRC::checkCCITT161(m_header, DSTAR_HEADER_LENGTH_BYTES);
if (!ret) {
if (m_ptr == 45U)
LogMessage("D-Star, invalid slow data header");
::memcpy(m_header + 39U, crc, 2U);
return NULL;
}