Fix the pdu release IE request type should not be intial request

src/lib/nas/enums.hpp

@@ -632,6 +632,7 @@ enum class ERequestType
     INITIAL_EMERGENCY_REQUEST = 0b011,
     EXISTING_EMERGENCY_PDU_SESSION = 0b100,
     MODIFICATION_REQUEST = 0b101,
+    RESERVED=0b111,
 };
 
 enum class EAllowedType
@@ -754,4 +755,4 @@ enum class EQoSOperationCode
 
 Json ToJson(const EPduSessionType &v);
 
-} // namespace nas
+} // namespace nas
\ No newline at end of file

src/ue/nas/sm/transport.cpp

@@ -69,6 +69,10 @@ void NasSm::sendSmMessage(int psi, const nas::SmMessage &msg)
     m.requestType = nas::IERequestType{};
     m.requestType->requestType =
         session->isEmergency ? nas::ERequestType::INITIAL_EMERGENCY_REQUEST : nas::ERequestType::INITIAL_REQUEST;
+    if (msg.messageType == nas::EMessageType::PDU_SESSION_RELEASE_REQUEST || msg.messageType == nas::EMessageType::PDU_SESSION_RELEASE_COMPLETE) {
+       m.requestType->requestType = nas::ERequestType::RESERVED;
+
+    }
 
     if (!session->isEmergency)
     {
@@ -156,4 +160,4 @@ void NasSm::receiveForwardingFailure(const nas::SmMessage &msg, nas::EMmCause ca
     abortProcedureByPti(msg.pti);
 }
 
-} // namespace nr::ue
+} // namespace nr::ue
\ No newline at end of file