add support to grant demand to support denying a grant and supporting unit to unit; better support LOC_REG_RSP being sent over the network;

src/p25/Control.cpp

@@ -1111,6 +1111,8 @@ void Control::processNetwork()
     }
 
     bool grantDemand = (buffer[14U] & 0x80U) == 0x80U;
+    bool grantDenial = (buffer[14U] & 0x40U) == 0x40U;
+    bool unitToUnit = (buffer[14U] & 0x01U) == 0x01U;
 
     // process network message header
     uint8_t duid = buffer[22U];
@@ -1283,7 +1285,15 @@ void Control::processNetwork()
                     LogMessage(LOG_NET, P25_TSDU_STR " remote grant demand, srcId = %u, dstId = %u", srcId, dstId);
                 }
 
-                if (!m_control->writeRF_TSDU_Grant(srcId, dstId, serviceOptions, true, true)) {
+                // are we denying the grant?
+                if (grantDenial) {
+                    m_control->writeRF_TSDU_Deny(srcId, dstId, P25_DENY_RSN_PTT_COLLIDE, (!unitToUnit) ? TSBK_IOSP_GRP_VCH : TSBK_IOSP_UU_VCH);
+                    return;
+                }
+
+                // perform grant response logic
+                if (!m_control->writeRF_TSDU_Grant(srcId, dstId, serviceOptions, unitToUnit, true))
+                {
                     LogError(LOG_NET, P25_TSDU_STR " call failure, network call not granted, dstId = %u", dstId);
                     return;
                 }

src/p25/packet/ControlSignaling.cpp

@@ -2726,11 +2726,14 @@ bool ControlSignaling::writeRF_TSDU_Loc_Reg_Rsp(uint32_t srcId, uint32_t dstId,
     osp->setDstId(dstId);
     osp->setSrcId(srcId);
 
+    bool noNet = false;
+
     // validate the source RID
     if (!acl::AccessControl::validateSrcId(srcId)) {
         LogWarning(LOG_RF, P25_TSDU_STR ", %s denial, RID rejection, srcId = %u", osp->toString().c_str(), srcId);
         ::ActivityLog("P25", true, "location registration request from %u denied", srcId);
         osp->setResponse(P25_RSP_REFUSED);
+        noNet = true;
     }
 
     // validate the source RID is registered
@@ -2751,6 +2754,7 @@ bool ControlSignaling::writeRF_TSDU_Loc_Reg_Rsp(uint32_t srcId, uint32_t dstId,
                 LogWarning(LOG_RF, P25_TSDU_STR ", %s denial, TGID rejection, dstId = %u", osp->toString().c_str(), dstId);
                 ::ActivityLog("P25", true, "location registration request from %u to %s %u denied", srcId, "TG ", dstId);
                 osp->setResponse(P25_RSP_DENY);
+                noNet = true;
             }
         }
     }
@@ -2764,7 +2768,7 @@ bool ControlSignaling::writeRF_TSDU_Loc_Reg_Rsp(uint32_t srcId, uint32_t dstId,
         ret = true;
     }
 
-    writeRF_TSDU_SBF_Imm(osp.get(), false);
+    writeRF_TSDU_SBF_Imm(osp.get(), noNet);
     return ret;
 }