From e88a3a0b2ab3d48ac12bdb65edf13784be4c70cb Mon Sep 17 00:00:00 2001
From: Bryan Biedenkapp <gatekeep@gmail.com>
Date: Sat, 8 Feb 2025 15:07:34 -0500
Subject: [PATCH] add support to decode LC_CALL_TERM when DVM is used in some
 reverse repeater situations;

---
 src/common/p25/lc/tdulc/LC_CALL_TERM.cpp | 14 ++++++++++++--
 src/common/p25/lc/tdulc/TDULCFactory.cpp |  2 ++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/common/p25/lc/tdulc/LC_CALL_TERM.cpp b/src/common/p25/lc/tdulc/LC_CALL_TERM.cpp
index 96377749..84634f4c 100644
--- a/src/common/p25/lc/tdulc/LC_CALL_TERM.cpp
+++ b/src/common/p25/lc/tdulc/LC_CALL_TERM.cpp
@@ -4,7 +4,7 @@
  * GPLv2 Open Source. Use is subject to license terms.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *  Copyright (C) 2022,2024 Bryan Biedenkapp, N2PLL
+ *  Copyright (C) 2022,2024,2025 Bryan Biedenkapp, N2PLL
  *
  */
 #include "Defines.h"
@@ -34,7 +34,17 @@ bool LC_CALL_TERM::decode(const uint8_t* data)
 {
     assert(data != nullptr);
 
-    /* stub */
+    uint8_t rs[P25_TDULC_LENGTH_BYTES + 1U];
+    ::memset(rs, 0x00U, P25_TDULC_LENGTH_BYTES);
+
+    bool ret = TDULC::decode(data, rs);
+    if (!ret)
+        return false;
+
+    ulong64_t rsValue = TDULC::toValue(rs);
+
+    m_implicit = true;
+    m_dstId = (uint32_t)(rsValue & 0xFFFFFFU);                                  // Target Address
 
     return true;
 }
diff --git a/src/common/p25/lc/tdulc/TDULCFactory.cpp b/src/common/p25/lc/tdulc/TDULCFactory.cpp
index 8d3bd6a2..4d5a9890 100644
--- a/src/common/p25/lc/tdulc/TDULCFactory.cpp
+++ b/src/common/p25/lc/tdulc/TDULCFactory.cpp
@@ -79,6 +79,8 @@ std::unique_ptr<TDULC> TDULCFactory::createTDULC(const uint8_t* data)
         return decode(new LC_PRIVATE(), data);
     case LCO::TEL_INT_VCH_USER:
         return decode(new LC_TEL_INT_VCH_USER(), data);
+    case LCO::CALL_TERM:
+        return decode(new LC_CALL_TERM(), data);
     default:
         LogError(LOG_P25, "TDULCFactory::create(), unknown TDULC LCO value, lco = $%02X", lco);
         break;