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Add stricter P25 id checking.

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This commit is contained in:
Jonathan Naylor
2017-08-19 12:37:32 +01:00
parent 23ce9c7b46
commit afe38bcb9d
5 changed files with 28 additions and 24 deletions
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24
P25Control.cpp
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@@ -179,7 +179,7 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
if (duid == P25_DUID_LDU1) {
if (m_rfState == RS_RF_LISTENING) {
m_rfData.reset();
bool ret = m_rfData.decodeLDU1(data + 2U, m_network != NULL, m_uidOverride);
bool ret = m_rfData.decodeLDU1(data + 2U);
if (!ret) {
m_lastDUID = duid;
return false;
@@ -189,28 +189,26 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
if (m_selfOnly) {
if (m_id > 99999999U) { // Check that the Config DMR-ID is bigger than 8 digits
if (srcId != m_id / 100U) {
LogMessage("P25, invalid access attempt from %u", srcId);
m_rfState = RS_RF_REJECTED;
if (srcId != m_id / 100U)
return false;
}
}
else if (m_id > 9999999U) { // Check that the Config DMR-ID is bigger than 7 digits
if (srcId != m_id / 10U) {
LogMessage("P25, invalid access attempt from %u", srcId);
m_rfState = RS_RF_REJECTED;
if (srcId != m_id / 10U)
return false;
}
}
else if (srcId != m_id) { // All other cases
LogMessage("P25, invalid access attempt from %u", srcId);
m_rfState = RS_RF_REJECTED;
return false;
}
}
if (!m_uidOverride) {
bool found = m_lookup->exists(srcId);
if (!found)
return false;
}
bool grp = m_rfData.getLCF() == P25_LCF_GROUP;
unsigned int dstId = m_rfData.getDstId();
std::string source = m_lookup->find(srcId);
@@ -321,9 +319,7 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
return true;
}
} else if (duid == P25_DUID_TERM || duid == P25_DUID_TERM_LC) {
if (m_rfState == RS_RF_REJECTED) {
m_rfState = RS_RF_LISTENING;
} else if (m_rfState == RS_RF_AUDIO) {
if (m_rfState == RS_RF_AUDIO) {
writeNetwork(m_rfLDU, m_lastDUID, true);
::memset(data + 2U, 0x00U, P25_TERM_FRAME_LENGTH_BYTES);