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Hopefully fix the unreceivable P25 transmissions.

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This commit is contained in:
Jonathan Naylor
2024-02-07 19:38:54 +00:00
parent da382647f6
commit 06a3da0f2e
2 changed files with 31 additions and 32 deletions
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26
P25Control.cpp
View File

@@ -361,7 +361,7 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
// Regenerate NID
m_nid.encode(data + 2U, P25_DUID_LDU2);
// Add the dummy LDU2 data
// Add the LDU2 data
m_rfData.encodeLDU2(data + 2U);
// Regenerate the Low Speed Data
@@ -960,7 +960,7 @@ void CP25Control::createRFHeader()
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_HEADER);
// Add the dummy header
// Add the header
m_rfData.encodeHeader(buffer + 2U);
// Add busy bits, inbound busy
@@ -995,18 +995,18 @@ void CP25Control::createNetHeader()
unsigned int dstId = (m_netLDU1[76U] << 16) + (m_netLDU1[77U] << 8) + m_netLDU1[78U];
unsigned int srcId = (m_netLDU1[101U] << 16) + (m_netLDU1[102U] << 8) + m_netLDU1[103U];
unsigned char algId = m_netLDU2[126U];
unsigned int kId = (m_netLDU2[127U] << 8) + m_netLDU2[128U];
// unsigned char algId = m_netLDU2[126U];
// unsigned int kId = (m_netLDU2[127U] << 8) + m_netLDU2[128U];
unsigned char mi[P25_MI_LENGTH_BYTES];
::memcpy(mi + 0U, m_netLDU2 + 51U, 3U);
::memcpy(mi + 3U, m_netLDU2 + 76U, 3U);
::memcpy(mi + 6U, m_netLDU2 + 101U, 3U);
// unsigned char mi[P25_MI_LENGTH_BYTES];
// ::memcpy(mi + 0U, m_netLDU2 + 51U, 3U);
// ::memcpy(mi + 3U, m_netLDU2 + 76U, 3U);
// ::memcpy(mi + 6U, m_netLDU2 + 101U, 3U);
m_netData.reset();
m_netData.setMI(mi);
m_netData.setAlgId(algId);
m_netData.setKId(kId);
// m_netData.setMI(mi);
// m_netData.setAlgId(algId);
// m_netData.setKId(kId);
m_netData.setLCF(lcf);
m_netData.setMFId(mfId);
m_netData.setSrcId(srcId);
@@ -1035,7 +1035,7 @@ void CP25Control::createNetHeader()
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_HEADER);
// Add the dummy header
// Add the header
m_netData.encodeHeader(buffer + 2U);
// Add busy bits
@@ -1121,7 +1121,7 @@ void CP25Control::createNetLDU2()
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_LDU2);
// Add the dummy LDU2 data
// Add the LDU2 data
m_netData.encodeLDU2(buffer + 2U);
// Add the Audio

37
P25Data.cpp
View File

@@ -1,5 +1,5 @@
/*
* Copyright (C) 2016,2017 by Jonathan Naylor G4KLX
* Copyright (C) 2016,2017,2023 by Jonathan Naylor G4KLX
* Copyright (C) 2018 by Bryan Biedenkapp <gatekeep@gmail.com> N2PLL
*
* This program is free software; you can redistribute it and/or modify
@@ -38,7 +38,7 @@ const unsigned char BIT_MASK_TABLE[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04
CP25Data::CP25Data() :
m_mi(NULL),
m_mfId(0U),
m_algId(0x80U),
m_algId(P25_ALGO_UNENCRYPT),
m_kId(0U),
m_lcf(0x00U),
m_emergency(false),
@@ -48,6 +48,7 @@ m_rs241213(),
m_trellis()
{
m_mi = new unsigned char[P25_MI_LENGTH_BYTES];
::memset(m_mi, 0x00U, P25_MI_LENGTH_BYTES);
}
CP25Data::~CP25Data()
@@ -66,7 +67,7 @@ CP25Data& CP25Data::operator=(const CP25Data& data)
m_emergency = data.m_emergency;
m_algId = data.m_algId;
m_kId = data.m_kId;
m_kId = data.m_kId;
::memcpy(m_mi, data.m_mi, P25_MI_LENGTH_BYTES);
}
@@ -97,20 +98,19 @@ bool CP25Data::decodeHeader(const unsigned char* data)
}
m_mfId = rs[9U]; // Mfg Id.
/*
m_algId = rs[10U]; // Algorithm ID
if (m_algId != P25_ALGO_UNENCRYPT) {
m_mi = new unsigned char[P25_MI_LENGTH_BYTES];
::memcpy(m_mi, rs, P25_MI_LENGTH_BYTES); // Message Indicator
m_kId = (rs[11U] << 8) + rs[12U]; // Key ID
m_kId = (rs[11U] << 8) | (rs[12U] << 0); // Key ID
} else {
m_mi = new unsigned char[P25_MI_LENGTH_BYTES];
::memset(m_mi, 0x00U, P25_MI_LENGTH_BYTES);
m_kId = 0x0000U;
}
*/
return true;
}
@@ -291,21 +291,20 @@ bool CP25Data::decodeLDU2(const unsigned char* data)
CUtils::dump(2U, "P25, RS crashed with input data", rs, 18U);
return false;
}
/*
m_algId = rs[9U]; // Algorithm ID
m_algId = rs[9U]; // Algorithm ID
if (m_algId != P25_ALGO_UNENCRYPT) {
m_mi = new unsigned char[P25_MI_LENGTH_BYTES];
::memcpy(m_mi, rs, P25_MI_LENGTH_BYTES); // Message Indicator
::memcpy(m_mi, rs, P25_MI_LENGTH_BYTES); // Message Indicator
m_kId = (rs[10U] << 8) + rs[11U]; // Key ID
m_kId = (rs[10U] << 8) + rs[11U]; // Key ID
}
else {
m_mi = new unsigned char[P25_MI_LENGTH_BYTES];
::memset(m_mi, 0x00U, P25_MI_LENGTH_BYTES);
m_kId = 0x0000U;
}
*/
return true;
}
@@ -318,11 +317,11 @@ void CP25Data::encodeLDU2(unsigned char* data)
::memset(rs, 0x00U, 18U);
for (unsigned int i = 0; i < P25_MI_LENGTH_BYTES; i++)
rs[i] = m_mi[i]; // Message Indicator
rs[i] = m_mi[i]; // Message Indicator
rs[9U] = m_algId; // Algorithm ID
rs[10U] = (m_kId >> 8) & 0xFFU; // Key ID MSB
rs[11U] = (m_kId >> 0) & 0xFFU; // Key ID LSB
rs[9U] = m_algId; // Algorithm ID
rs[10U] = (m_kId >> 8) & 0xFFU; // Key ID MSB
rs[11U] = (m_kId >> 0) & 0xFFU; // Key ID LSB
// encode RS (24,16,9) FEC
m_rs241213.encode24169(rs);
@@ -370,7 +369,7 @@ bool CP25Data::decodeTSDU(const unsigned char* data)
return false;
}
m_lcf = tsbk[0U] & 0x3F;
m_lcf = tsbk[0U] & 0x3F;
m_mfId = tsbk[1U];
unsigned long long tsbkValue = 0U;
@@ -556,7 +555,7 @@ void CP25Data::reset()
{
::memset(m_mi, 0x00U, P25_MI_LENGTH_BYTES);
m_algId = 0x80U;
m_algId = P25_ALGO_UNENCRYPT;
m_kId = 0x0000U;
m_lcf = P25_LCF_GROUP;
m_mfId = 0x00U;