NGAP paging handling

src/asn/utils/utils.hpp

@@ -198,4 +198,12 @@ inline Unique<T> WrapUnique(T *ptr, asn_TYPE_descriptor_t &desc)
     return asn::Unique<T>(ptr, asn::Deleter<T>{desc});
 }
 
+template <typename T>
+inline Unique<T> UniqueCopy(const T &value, asn_TYPE_descriptor_t &desc)
+{
+    auto *ptr = New<T>();
+    DeepCopy(desc, value, ptr);
+    return WrapUnique(ptr, desc);
+}
+
 } // namespace asn
\ No newline at end of file

src/gnb/ngap/radio.cpp

@@ -13,6 +13,9 @@
 #include <gnb/gtp/task.hpp>
 #include <gnb/rrc/task.hpp>
 
+#include <asn/ngap/ASN_NGAP_FiveG-S-TMSI.h>
+#include <asn/ngap/ASN_NGAP_Paging.h>
+
 namespace nr::gnb
 {
 
@@ -27,4 +30,31 @@ void NgapTask::handleRadioLinkFailure(int ueId)
     sendContextRelease(ueId, NgapCause::RadioNetwork_radio_connection_with_ue_lost);
 }
 
+void NgapTask::receivePaging(int amfId, ASN_NGAP_Paging *msg)
+{
+    m_logger->debug("Paging received");
+
+    auto *amf = findAmfContext(amfId);
+    if (amf == nullptr)
+        return;
+
+    auto *w = new NwGnbNgapToRrc(NwGnbNgapToRrc::PAGING);
+
+    auto *ieUePagingIdentity = asn::ngap::GetProtocolIe(msg, ASN_NGAP_ProtocolIE_ID_id_UEPagingIdentity);
+    if (ieUePagingIdentity)
+    {
+        if (ieUePagingIdentity->UEPagingIdentity.present == ASN_NGAP_UEPagingIdentity_PR_fiveG_S_TMSI)
+            w->uePagingTmsi = asn::UniqueCopy(*ieUePagingIdentity->UEPagingIdentity.choice.fiveG_S_TMSI,
+                                              asn_DEF_ASN_NGAP_FiveG_S_TMSI);
+    }
+
+    auto *ieTaiListForPaging = asn::ngap::GetProtocolIe(msg, ASN_NGAP_ProtocolIE_ID_id_TAIListForPaging);
+    if (ieTaiListForPaging)
+    {
+        w->taiListForPaging = asn::UniqueCopy(ieTaiListForPaging->TAIListForPaging, asn_DEF_ASN_NGAP_TAIListForPaging);
+    }
+
+    m_base->rrcTask->push(w);
+}
+
 } // namespace nr::gnb

src/gnb/nts.hpp

@@ -8,8 +8,10 @@
 
 #pragma once
 
+#include "types.hpp"
 #include <app/cli_base.hpp>
 #include <app/cli_cmd.hpp>
+#include <asn/utils/utils.hpp>
 #include <rrc/rrc.hpp>
 #include <sctp/sctp.hpp>
 #include <utility>
@@ -18,7 +20,8 @@
 #include <utils/octet_string.hpp>
 #include <utils/unique_buffer.hpp>
 
-#include "types.hpp"
+extern "C" struct ASN_NGAP_FiveG_S_TMSI;
+extern "C" struct ASN_NGAP_TAIListForPaging;
 
 namespace nr::gnb
 {
@@ -103,6 +106,7 @@ struct NwGnbNgapToRrc : NtsMessage
         RADIO_POWER_ON,
         NAS_DELIVERY,
         AN_RELEASE,
+        PAGING,
     } present;
 
     // NAS_DELIVERY
@@ -112,6 +116,10 @@ struct NwGnbNgapToRrc : NtsMessage
     // NAS_DELIVERY
     OctetString pdu{};
 
+    // PAGING
+    asn::Unique<ASN_NGAP_FiveG_S_TMSI> uePagingTmsi{};
+    asn::Unique<ASN_NGAP_TAIListForPaging> taiListForPaging{};
+
     explicit NwGnbNgapToRrc(PR present) : NtsMessage(NtsMessageType::GNB_NGAP_TO_RRC), present(present)
     {
     }