SM cause send implementation

src/ue/sm/sm.hpp

@@ -55,7 +55,7 @@ class NasSm
     void sendSmMessage(int psi, const nas::SmMessage &msg);
     void receiveSmStatus(const nas::FiveGSmStatus &msg);
     void receiveSmCause(const nas::IE5gSmCause &msg);
-    void sendSmCause(const nas::ESmCause &cause, int psi);
+    void sendSmCause(const nas::ESmCause &cause, int pti, int psi);
 
     /* Allocation */
     int allocatePduSessionId(const SessionConfig &config);

src/ue/sm/transport.cpp

@@ -72,10 +72,22 @@ void NasSm::receiveSmCause(const nas::IE5gSmCause &msg)
     m_logger->err("SM cause received: %s", nas::utils::EnumToString(msg.value));
 }
 
-void NasSm::sendSmCause(const nas::ESmCause &cause, int psi)
+void NasSm::sendSmCause(const nas::ESmCause &cause, int pti, int psi)
 {
     m_logger->warn("Sending SM Cause[%s] for PSI[%d]", nas::utils::EnumToString(cause), psi);
-    // TODO
+
+    nas::FiveGSmStatus smStatus{};
+    smStatus.smCause.value = cause;
+    smStatus.pti = pti;
+    smStatus.pduSessionId = psi;
+
+    nas::UlNasTransport ulTransport{};
+    ulTransport.payloadContainerType.payloadContainerType = nas::EPayloadContainerType::N1_SM_INFORMATION;
+    nas::EncodeNasMessage(smStatus, ulTransport.payloadContainer.data);
+    ulTransport.pduSessionId = nas::IEPduSessionIdentity2{};
+    ulTransport.pduSessionId->value = psi;
+
+    m_mm->deliverUlTransport(ulTransport);
 }
 
 } // namespace nr::ue
\ No newline at end of file

src/ue/sm/utils.cpp

@@ -19,7 +19,7 @@ bool NasSm::checkPtiAndPsi(const nas::SmMessage &msg)
     if (msg.pti < ProcedureTransaction::MIN_ID || msg.pti > ProcedureTransaction::MAX_ID)
     {
         m_logger->err("Received PTI [%d] value is invalid", msg.pti);
-        sendSmCause(nas::ESmCause::INVALID_PTI_VALUE, msg.pduSessionId);
+        sendSmCause(nas::ESmCause::INVALID_PTI_VALUE, msg.pti, msg.pduSessionId);
         return false;
     }
 
@@ -27,7 +27,7 @@ bool NasSm::checkPtiAndPsi(const nas::SmMessage &msg)
     {
         m_logger->err("Received PSI value [%d] is invalid, expected was [%d]", msg.pduSessionId,
                       m_procedureTransactions[msg.pti].psi);
-        sendSmCause(nas::ESmCause::INVALID_PTI_VALUE, msg.pduSessionId);
+        sendSmCause(nas::ESmCause::INVALID_PTI_VALUE, msg.pti, msg.pduSessionId);
         return false;
     }