CCSBK::CCSBK(const unsigned char* bytes) :
m_CSBKO(CSBKO_NONE),
m_FID(0x00U),
m_bsId(0U),
m_srcId(0U),
m_dstId(0U),
m_valid(false)
{
assert(bytes != NULL);
CBPTC19696 bptc;
unsigned char data[12U];
bptc.decode(bytes, data);
data[10U] ^= CSBK_CRC_MASK[0U];
data[11U] ^= CSBK_CRC_MASK[1U];
m_valid = CCRC::checkCCITT16(data, 12U);
m_CSBKO = CSBKO(data[0U] & 0x3FU);
m_FID = data[1U];
switch (m_CSBKO) {
case CSBKO_BSDWNACT:
m_bsId = data[4U] << 16 | data[5U] << 8 | data[6U];
m_srcId = data[7U] << 16 | data[8U] << 8 | data[9U];
CUtils::dump("Download Activate CSBK", data, 12U);
break;
case CSBKO_UUVREQ:
m_dstId = data[4U] << 16 | data[5U] << 8 | data[6U];
m_srcId = data[7U] << 16 | data[8U] << 8 | data[9U];
CUtils::dump("Unit to Unit Service Request CSBK", data, 12U);
break;
case CSBKO_UUANSRSP:
m_dstId = data[4U] << 16 | data[5U] << 8 | data[6U];
m_srcId = data[7U] << 16 | data[8U] << 8 | data[9U];
CUtils::dump("Unit to Unit Service Answer Response CSBK", data, 12U);
break;
case CSBKO_PRECCSBK:
m_dstId = data[4U] << 16 | data[5U] << 8 | data[6U];
m_srcId = data[7U] << 16 | data[8U] << 8 | data[9U];
CUtils::dump("Preamble CSBK", data, 12U);
break;
case CSBKO_NACKRSP:
m_srcId = data[4U] << 16 | data[5U] << 8 | data[6U];
m_dstId = data[7U] << 16 | data[8U] << 8 | data[9U];
CUtils::dump("Negative Acknowledge Response CSBK", data, 12U);
break;
default:
CUtils::dump("Unhandled CSBK type", data, 12U);
break;
}
}
bool CDMRCSBK::put(const unsigned char* bytes)
{
assert(bytes != NULL);
CBPTC19696 bptc;
bptc.decode(bytes, m_data);
m_data[10U] ^= CSBK_CRC_MASK[0U];
m_data[11U] ^= CSBK_CRC_MASK[1U];
bool valid = CCRC::checkCCITT162(m_data, 12U);
if (!valid)
return false;
// Restore the checksum
m_data[10U] ^= CSBK_CRC_MASK[0U];
m_data[11U] ^= CSBK_CRC_MASK[1U];
m_CSBKO = CSBKO(m_data[0U] & 0x3FU);
m_FID = m_data[1U];
switch (m_CSBKO) {
case CSBKO_BSDWNACT:
m_GI = false;
m_bsId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
m_dataContent = false;
m_CBF = 0U;
CUtils::dump(1U, "Downlink Activate CSBK", m_data, 12U);
break;
case CSBKO_UUVREQ:
m_GI = false;
m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
m_dataContent = false;
m_CBF = 0U;
CUtils::dump(1U, "Unit to Unit Service Request CSBK", m_data, 12U);
break;
case CSBKO_UUANSRSP:
m_GI = false;
m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
m_dataContent = false;
m_CBF = 0U;
CUtils::dump(1U, "Unit to Unit Service Answer Response CSBK", m_data, 12U);
break;
case CSBKO_PRECCSBK:
m_GI = (m_data[2U] & 0x40U) == 0x40U;
m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
m_dataContent = (m_data[2U] & 0x80U) == 0x80U;
m_CBF = m_data[3U];
CUtils::dump(1U, "Preamble CSBK", m_data, 12U);
break;
case CSBKO_NACKRSP:
m_GI = false;
m_srcId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_dstId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
m_dataContent = false;
m_CBF = 0U;
CUtils::dump(1U, "Negative Acknowledge Response CSBK", m_data, 12U);
break;
default:
m_GI = false;
m_srcId = 0U;
m_dstId = 0U;
m_dataContent = false;
m_CBF = 0U;
CUtils::dump("Unhandled CSBK type", m_data, 12U);
return true;
}
return true;
}
