add appropriate support for DMR TSCC to repeat the channel grant following appropriate channel grant; add support to affiliation tables to log what source ID a destination ID is granted to;

src/dmr/Slot.cpp

@@ -159,6 +159,7 @@ Slot::Slot(uint32_t slotNo, uint32_t timeout, uint32_t tgHang, uint32_t queueSiz
     m_tsccPayloadDstId(0U),
     m_tsccPayloadGroup(false),
     m_tsccPayloadVoice(true),
+    m_lastLateEntry(0U),
     m_verbose(verbose),
     m_debug(debug)
 {
@@ -438,7 +439,7 @@ void Slot::clock()
 
             if (m_ccPacketInterval.isRunning() && m_ccPacketInterval.hasExpired()) {
                 if (m_ccRunning) {
-                    if (m_ccSeq == 3U) {
+                    if (m_ccSeq == 4U) {
                         m_ccSeq = 0U;
                     }
 
@@ -975,9 +976,9 @@ void Slot::writeRF_ControlData(uint16_t frameCnt, uint8_t n)
         return;
     }
 
-    // loop to generate 3 control sequences
+    // loop to generate 4 control sequences
     if (frameCnt == 511U) {
-        seqCnt = 3U;
+        seqCnt = 4U;
     }
 
     // should we insert the Git Hash burst?
@@ -999,6 +1000,37 @@ void Slot::writeRF_ControlData(uint16_t frameCnt, uint8_t n)
 
         switch (n)
         {
+        case 3:
+        {
+            std::unordered_map<uint32_t, uint32_t> grants = m_affiliations->grantTable();
+            if (grants.size() > 0) {
+                uint32_t j = 0U;
+                if (m_lastLateEntry > grants.size()) {
+                    m_lastLateEntry = 0U;
+                }
+
+                for (auto entry : grants) {
+                    if (j == m_lastLateEntry) {
+                        uint32_t dstId = entry.first;
+                        uint32_t srcId = m_affiliations->getGrantedSrcId(dstId);
+
+                        if (m_debug) {
+                            LogDebug(LOG_DMR, "writeRF_ControlData, frameCnt = %u, seq = %u, late entry, dstId = %u, srcId = %u", frameCnt, n, dstId, srcId);
+                        }
+
+                        m_control->writeRF_CSBK_Grant_LateEntry(dstId, srcId);
+                        m_lastLateEntry = j++;
+                        break;
+                    }
+
+                    j++;
+                }
+            }
+            else {
+                m_control->writeRF_TSCC_Bcast_Sys_Parm();
+            }
+        }
+        break;
         case 2:
             m_control->writeRF_TSCC_Bcast_Ann_Wd(m_channelNo, true);
             break;

src/dmr/Slot.h

@@ -196,6 +196,8 @@ namespace dmr
         bool m_tsccPayloadGroup;
         bool m_tsccPayloadVoice;
 
+        uint32_t m_lastLateEntry;
+
         bool m_controlPermitTG;
 
         bool m_verbose;

src/dmr/lc/csbk/CSBK_TV_GRANT.cpp

@@ -42,7 +42,8 @@ using namespace dmr;
 /// <summary>
 /// Initializes a new instance of the CSBK_TV_GRANT class.
 /// </summary>
-CSBK_TV_GRANT::CSBK_TV_GRANT() : CSBK()
+CSBK_TV_GRANT::CSBK_TV_GRANT() : CSBK(),
+    m_lateEntry(false)
 {
     m_CSBKO = CSBKO_TV_GRANT;
 }
@@ -73,7 +74,7 @@ void CSBK_TV_GRANT::encode(uint8_t* data)
 
     csbkValue = (csbkValue << 12) + (m_logicalCh1 & 0xFFFU);                        // Logical Physical Channel 1
     csbkValue = (csbkValue << 1) + (m_slotNo & 0x3U);                               // Logical Slot Number
-    csbkValue = (csbkValue << 1) + 0U;                                              // Late Entry
+    csbkValue = (csbkValue << 1) + ((m_lateEntry) ? 1U : 0U);;                      // Late Entry
     csbkValue = (csbkValue << 1) + ((m_emergency) ? 1U : 0U);                       // Emergency
     csbkValue = (csbkValue << 1) + ((m_siteOffsetTiming) ? 1U : 0U);                // Site Timing: Aligned or Offset
     csbkValue = (csbkValue << 24) + m_dstId;                                        // Talkgroup ID
@@ -82,3 +83,18 @@ void CSBK_TV_GRANT::encode(uint8_t* data)
     std::unique_ptr<uint8_t[]> csbk = CSBK::fromValue(csbkValue);
     CSBK::encode(data, csbk.get());
 }
+
+// ---------------------------------------------------------------------------
+//  Private Class Members
+// ---------------------------------------------------------------------------
+
+/// <summary>
+/// Internal helper to copy the the class.
+/// </summary>
+/// <param name="data"></param>
+void CSBK_TV_GRANT::copy(const CSBK_TV_GRANT& data)
+{
+    CSBK::copy(data);
+
+    m_lateEntry = data.m_lateEntry;
+}

src/dmr/lc/csbk/CSBK_TV_GRANT.h

@@ -49,6 +49,12 @@ namespace dmr
                 virtual bool decode(const uint8_t* data);
                 /// <summary>Encode a control signalling block.</summary>
                 virtual void encode(uint8_t* data);
+
+            public:
+                /// <summary>Flag indicating whether the grant is a late entry.</summary>
+                __PROPERTY(bool, lateEntry, LateEntry);
+
+                __COPY(CSBK_TV_GRANT);      
             };
         } // namespace csbk
     } // namespace lc

src/dmr/lookups/DMRAffiliationLookup.cpp

@@ -62,9 +62,10 @@ DMRAffiliationLookup::~DMRAffiliationLookup()
 /// Helper to grant a channel.
 /// </summary>
 /// <param name="dstId"></param>
+/// <param name="srcId"></param>
 /// <param name="grantTimeout"></param>
 /// <returns></returns>
-bool DMRAffiliationLookup::grantCh(uint32_t dstId, uint32_t grantTimeout)
+bool DMRAffiliationLookup::grantCh(uint32_t dstId, uint32_t srcId, uint32_t grantTimeout)
 {
     uint32_t chNo = m_rfChTable.at(0);
     uint8_t slot = getAvailableSlotForChannel(chNo);
@@ -73,17 +74,18 @@ bool DMRAffiliationLookup::grantCh(uint32_t dstId, uint32_t grantTimeout)
         return false;
     }
 
-    return grantChSlot(dstId, slot, grantTimeout);
+    return grantChSlot(dstId, srcId, slot, grantTimeout);
 }
 
 /// <summary>
 /// Helper to grant a channel and slot.
 /// </summary>
 /// <param name="dstId"></param>
+/// <param name="srcId"></param>
 /// <param name="slot"></param>
 /// <param name="grantTimeout"></param>
 /// <returns></returns>
-bool DMRAffiliationLookup::grantChSlot(uint32_t dstId, uint8_t slot, uint32_t grantTimeout)
+bool DMRAffiliationLookup::grantChSlot(uint32_t dstId, uint32_t srcId, uint8_t slot, uint32_t grantTimeout)
 {
     if (dstId == 0U) {
         return false;
@@ -104,6 +106,7 @@ bool DMRAffiliationLookup::grantChSlot(uint32_t dstId, uint8_t slot, uint32_t gr
     }
 
     m_grantChTable[dstId] = chNo;
+    m_grantSrcIdTable[dstId] = srcId;
     m_grantChSlotTable[dstId] = std::make_tuple(chNo, slot);
     m_rfGrantChCnt++;
 
@@ -161,7 +164,8 @@ bool DMRAffiliationLookup::releaseGrant(uint32_t dstId, bool releaseAll)
             m_releaseGrant(chNo, dstId, slot);
         }
 
-        m_grantChTable[dstId] = 0U;
+        m_grantChTable.erase(dstId);
+        m_grantSrcIdTable.erase(dstId);
         m_grantChSlotTable.erase(dstId);
 
         auto it = std::find(m_rfChTable.begin(), m_rfChTable.end(), chNo);

src/dmr/lookups/DMRAffiliationLookup.h

@@ -50,9 +50,9 @@ namespace dmr
             virtual ~DMRAffiliationLookup();
 
             /// <summary>Helper to grant a channel.</summary>
-            virtual bool grantCh(uint32_t dstId, uint32_t grantTimeout);
+            virtual bool grantCh(uint32_t dstId, uint32_t srcId, uint32_t grantTimeout);
             /// <summary>Helper to grant a channel and slot.</summary>
-            bool grantChSlot(uint32_t dstId, uint8_t slot, uint32_t grantTimeout);
+            bool grantChSlot(uint32_t dstId, uint32_t srcId, uint8_t slot, uint32_t grantTimeout);
             /// <summary>Helper to release the channel grant for the destination ID.</summary>
             virtual bool releaseGrant(uint32_t dstId, bool releaseAll);
             /// <summary>Helper to determine if the channel number is busy.</summary>

src/dmr/packet/ControlSignaling.cpp

@@ -821,7 +821,7 @@ bool ControlSignaling::writeRF_CSBK_Grant(uint32_t srcId, uint32_t dstId, uint8_
                 }
             }
             else {
-                if (m_tscc->m_affiliations->grantCh(dstId, GRANT_TIMER_TIMEOUT)) {
+                if (m_tscc->m_affiliations->grantCh(dstId, srcId, GRANT_TIMER_TIMEOUT)) {
                     chNo = m_tscc->m_affiliations->getGrantedCh(dstId);
                     slot = m_tscc->m_affiliations->getGrantedSlot(dstId);
                     //m_tscc->m_siteData.setChCnt(m_tscc->m_affiliations->getRFChCnt() + m_tscc->m_affiliations->getGrantedRFChCnt());
@@ -1056,7 +1056,7 @@ bool ControlSignaling::writeRF_CSBK_Data_Grant(uint32_t srcId, uint32_t dstId, u
                 }
             }
             else {
-                if (m_tscc->m_affiliations->grantCh(dstId, GRANT_TIMER_TIMEOUT)) {
+                if (m_tscc->m_affiliations->grantCh(dstId, srcId, GRANT_TIMER_TIMEOUT)) {
                     chNo = m_tscc->m_affiliations->getGrantedCh(dstId);
                     slot = m_tscc->m_affiliations->getGrantedSlot(dstId);
 
@@ -1219,6 +1219,29 @@ void ControlSignaling::writeRF_CSBK_U_Reg_Rsp(uint32_t srcId, uint8_t serviceOpt
     writeRF_CSBK(csbk.get());
 }
 
+
+/// <summary>
+/// Helper to write a grant packet.
+/// </summary>
+/// <param name="dstId"></param>
+/// <param name="srcId"></param>
+void ControlSignaling::writeRF_CSBK_Grant_LateEntry(uint32_t dstId, uint32_t srcId)
+{
+    Slot *m_tscc = m_slot->m_dmr->getTSCCSlot();
+
+    uint32_t chNo = m_tscc->m_affiliations->getGrantedCh(dstId);
+    uint8_t slot = m_tscc->m_affiliations->getGrantedSlot(dstId);
+
+    std::unique_ptr<CSBK_TV_GRANT> csbk = new_unique(CSBK_TV_GRANT);
+    csbk->setLogicalCh1(chNo);
+    csbk->setSlotNo(slot - 1U);
+
+    csbk->setSrcId(srcId);
+    csbk->setDstId(dstId);
+
+    writeRF_CSBK(csbk.get());
+}
+
 /// <summary>
 /// Helper to write a TSCC Aloha broadcast packet on the RF interface.
 /// </summary>

src/dmr/packet/ControlSignaling.h

@@ -101,6 +101,9 @@ namespace dmr
             /// <summary>Helper to write a unit registration response packet.</summary>
             void writeRF_CSBK_U_Reg_Rsp(uint32_t srcId, uint8_t serviceOptions);
 
+            /// <summary>Helper to write a TSCC late entry channel grant packet on the RF interface.</summary>
+            void writeRF_CSBK_Grant_LateEntry(uint32_t dstId, uint32_t srcId);
+
             /// <summary>Helper to write a TSCC Aloha broadcast packet on the RF interface.</summary>
             void writeRF_TSCC_Aloha();
             /// <summary>Helper to write a TSCC Ann-Wd broadcast packet on the RF interface.</summary>

src/lookups/AffiliationLookup.cpp

@@ -49,6 +49,7 @@ AffiliationLookup::AffiliationLookup(const char* name, bool verbose) :
     m_unitRegTable(),
     m_grpAffTable(),
     m_grantChTable(),
+    m_grantSrcIdTable(),
     m_grantTimers(),
     m_name(name),
     m_verbose(verbose)
@@ -59,6 +60,7 @@ AffiliationLookup::AffiliationLookup(const char* name, bool verbose) :
     m_grpAffTable.clear();
 
     m_grantChTable.clear();
+    m_grantSrcIdTable.clear();
     m_grantTimers.clear();
 }
 
@@ -238,9 +240,10 @@ std::vector<uint32_t> AffiliationLookup::clearGroupAff(uint32_t dstId, bool rele
 /// Helper to grant a channel.
 /// </summary>
 /// <param name="dstId"></param>
+/// <param name="srcId"></param>
 /// <param name="grantTimeout"></param>
 /// <returns></returns>
-bool AffiliationLookup::grantCh(uint32_t dstId, uint32_t grantTimeout)
+bool AffiliationLookup::grantCh(uint32_t dstId, uint32_t srcId, uint32_t grantTimeout)
 {
     if (dstId == 0U) {
         return false;
@@ -255,14 +258,15 @@ bool AffiliationLookup::grantCh(uint32_t dstId, uint32_t grantTimeout)
     m_rfChTable.erase(it);
 
     m_grantChTable[dstId] = chNo;
+    m_grantSrcIdTable[dstId] = srcId;
     m_rfGrantChCnt++;
 
     m_grantTimers[dstId] = Timer(1000U, grantTimeout);
     m_grantTimers[dstId].start();
 
     if (m_verbose) {
-        LogMessage(LOG_HOST, "%s, granting channel, chNo = %u, dstId = %u",
-            m_name, chNo, dstId);
+        LogMessage(LOG_HOST, "%s, granting channel, chNo = %u, dstId = %u, srcId = %u",
+            m_name, chNo, dstId, srcId);
     }
 
     return true;
@@ -321,7 +325,8 @@ bool AffiliationLookup::releaseGrant(uint32_t dstId, bool releaseAll)
                 m_name, chNo, dstId);
         }
 
-        m_grantChTable[dstId] = 0U;
+        m_grantChTable.erase(dstId);
+        m_grantSrcIdTable.erase(dstId);
         m_rfChTable.push_back(chNo);
 
         if (m_rfGrantChCnt > 0U) {
@@ -402,6 +407,24 @@ uint32_t AffiliationLookup::getGrantedCh(uint32_t dstId)
     return 0U;
 }
 
+/// <summary>
+/// Helper to get the source ID granted for the given destination ID.
+/// </summary>
+/// <param name="dstId"></param>
+/// <returns></returns>
+uint32_t AffiliationLookup::getGrantedSrcId(uint32_t dstId)
+{
+    if (dstId == 0U) {
+        return 0U;
+    }
+
+    if (isGranted(dstId)) {
+        return m_grantSrcIdTable[dstId];
+    }
+
+    return 0U;
+}
+
 /// <summary>
 /// Helper to get RF channel data.
 /// </summary>

src/lookups/AffiliationLookup.h

@@ -137,7 +137,7 @@ namespace lookups
         /// <summary>Gets the grant table.</summary>
         std::unordered_map<uint32_t, uint32_t> grantTable() const { return m_grantChTable; }
         /// <summary>Helper to grant a channel.</summary>
-        virtual bool grantCh(uint32_t dstId, uint32_t grantTimeout);
+        virtual bool grantCh(uint32_t dstId, uint32_t srcId, uint32_t grantTimeout);
         /// <summary>Helper to start the destination ID grant timer.</summary>
         virtual void touchGrant(uint32_t dstId);
         /// <summary>Helper to release the channel grant for the destination ID.</summary>
@@ -148,6 +148,8 @@ namespace lookups
         virtual bool isGranted(uint32_t dstId) const;
         /// <summary>Helper to get the channel granted for the given destination ID.</summary>
         virtual uint32_t getGrantedCh(uint32_t dstId);
+        /// <summary>Helper to get the source ID granted for the given destination ID.</summary>        
+        virtual uint32_t getGrantedSrcId(uint32_t srcId);
 
         /// <summary>Helper to set RF channel data.</summary>
         void setRFChData(const std::unordered_map<uint32_t, VoiceChData> chData) { m_rfChDataTable = chData; }
@@ -177,6 +179,7 @@ namespace lookups
         std::unordered_map<uint32_t, uint32_t> m_grpAffTable;
 
         std::unordered_map<uint32_t, uint32_t> m_grantChTable;
+        std::unordered_map<uint32_t, uint32_t> m_grantSrcIdTable;
         std::unordered_map<uint32_t, Timer> m_grantTimers;
 
         const char *m_name;

src/nxdn/packet/Trunk.cpp

@@ -488,7 +488,7 @@ bool Trunk::writeRF_Message_Grant(uint32_t srcId, uint32_t dstId, uint8_t servic
                 }
             }
             else {
-                if (m_nxdn->m_affiliations.grantCh(dstId, GRANT_TIMER_TIMEOUT)) {
+                if (m_nxdn->m_affiliations.grantCh(dstId, srcId, GRANT_TIMER_TIMEOUT)) {
                     chNo = m_nxdn->m_affiliations.getGrantedCh(dstId);
                 }
             }

src/p25/packet/Trunk.cpp

@@ -2216,7 +2216,7 @@ bool Trunk::writeRF_TSDU_Grant(uint32_t srcId, uint32_t dstId, uint8_t serviceOp
                 }
             }
             else {
-                if (m_p25->m_affiliations.grantCh(dstId, GRANT_TIMER_TIMEOUT)) {
+                if (m_p25->m_affiliations.grantCh(dstId, srcId, GRANT_TIMER_TIMEOUT)) {
                     chNo = m_p25->m_affiliations.getGrantedCh(dstId);
                     m_p25->m_siteData.setChCnt(m_p25->m_affiliations.getRFChCnt() + m_p25->m_affiliations.getGrantedRFChCnt());
                 }
@@ -2360,7 +2360,7 @@ bool Trunk::writeRF_TSDU_SNDCP_Grant(uint32_t srcId, uint32_t dstId, bool skip,
                 return false;
             }
             else {
-                if (m_p25->m_affiliations.grantCh(srcId, GRANT_TIMER_TIMEOUT)) {
+                if (m_p25->m_affiliations.grantCh(srcId, srcId, GRANT_TIMER_TIMEOUT)) {
                     uint32_t chNo = m_p25->m_affiliations.getGrantedCh(srcId);
                     osp->setGrpVchNo(chNo);
                     osp->setDataChnNo(chNo);