F1AP: Add gNB-DU Configuration Query IE support

This field will be adopted to trigger cgc encoding at DU,
according to the specs (see subsequent commit for details).

Changes:
- Add gNB_DU_Configuration_Query field to f1ap_ue_context_mod_req_t
- Implement encoding/decoding
- Add to cp, eq, and free functions for the new field
- Update tests to include the new field

openair2/COMMON/f1ap_messages_types.h

@@ -552,6 +552,9 @@ typedef struct f1ap_ue_context_mod_req_t {
 
   byte_array_t *rrc_container;
 
+  // gNB-DU Configuration Query
+  bool *gNB_DU_Configuration_Query;
+
   int srbs_len;
   f1ap_srb_to_setup_t *srbs; // reuse the same type as for setup; there is a
                              // list for SRB modification

openair2/F1AP/lib/f1ap_ue_context.c

@@ -1666,6 +1666,15 @@ F1AP_F1AP_PDU_t *encode_ue_context_mod_req(const f1ap_ue_context_mod_req_t *req)
     OCTET_STRING_fromBuf(&ie81->value.choice.RRCContainer, (const char *)req->rrc_container->buf, req->rrc_container->len);
   }
 
+  /* optional: gNB-DU Configuration Query */
+  if (req->gNB_DU_Configuration_Query && *req->gNB_DU_Configuration_Query) {
+    asn1cSequenceAdd(out->protocolIEs.list, F1AP_UEContextModificationRequestIEs_t, ie82);
+    ie82->id = F1AP_ProtocolIE_ID_id_GNB_DUConfigurationQuery;
+    ie82->criticality = F1AP_Criticality_ignore;
+    ie82->value.present = F1AP_UEContextModificationRequestIEs__value_PR_GNB_DUConfigurationQuery;
+    ie82->value.choice.GNB_DUConfigurationQuery = F1AP_GNB_DUConfigurationQuery_true;
+  }
+
   /* optional: SRBs_ToBeSetupMod */
   if (req->srbs_len > 0) {
     DevAssert(req->srbs);
@@ -1777,6 +1786,13 @@ bool decode_ue_context_mod_req(const F1AP_F1AP_PDU_t *pdu, f1ap_ue_context_mod_r
           *out->rrc_container = create_byte_array(os->size, os->buf);
         }
         break;
+      case F1AP_ProtocolIE_ID_id_GNB_DUConfigurationQuery:
+        _F1_EQ_CHECK_INT(ie->value.present, F1AP_UEContextModificationRequestIEs__value_PR_GNB_DUConfigurationQuery);
+        {
+          bool v = ie->value.choice.GNB_DUConfigurationQuery == F1AP_GNB_DUConfigurationQuery_true;
+          _F1_MALLOC(out->gNB_DU_Configuration_Query, v);
+        }
+        break;
       case F1AP_ProtocolIE_ID_id_SRBs_ToBeSetupMod_List:
         _F1_EQ_CHECK_INT(ie->value.present, F1AP_UEContextModificationRequestIEs__value_PR_SRBs_ToBeSetupMod_List);
         _F1_CHECK_EXP(decode_srbs_to_setupmod(&ie->value.choice.SRBs_ToBeSetupMod_List, &out->srbs_len, &out->srbs));
@@ -1862,6 +1878,8 @@ f1ap_ue_context_mod_req_t cp_ue_context_mod_req(const f1ap_ue_context_mod_req_t
   }
   if (orig->status)
     _F1_MALLOC(cp.status, *orig->status);
+  if (orig->gNB_DU_Configuration_Query)
+    _F1_MALLOC(cp.gNB_DU_Configuration_Query, *orig->gNB_DU_Configuration_Query);
   return cp;
 }
 
@@ -1898,6 +1916,7 @@ bool eq_ue_context_mod_req(const f1ap_ue_context_mod_req_t *a, const f1ap_ue_con
     _F1_CHECK_EXP(eq_drb_to_release(&a->drbs_rel[i], &b->drbs_rel[i]));
 
   _F1_EQ_CHECK_OPTIONAL_IE(a, b, status, _F1_EQ_CHECK_INT);
+  _F1_EQ_CHECK_OPTIONAL_IE(a, b, gNB_DU_Configuration_Query, _F1_EQ_CHECK_INT);
   return true;
 }
 
@@ -1925,6 +1944,7 @@ void free_ue_context_mod_req(f1ap_ue_context_mod_req_t *req)
     free_drb_to_release(&req->drbs_rel[i]);
   free(req->drbs_rel);
   free(req->status);
+  free(req->gNB_DU_Configuration_Query);
 }
 
 /**

openair2/F1AP/tests/f1ap_lib_test.c

@@ -1039,6 +1039,7 @@ static void test_f1ap_ue_context_modification_request()
   orig.drbs_rel[2].id = 19;
 
   _F1_MALLOC(orig.status, LOWER_LAYERS_RESUME);
+  _F1_MALLOC(orig.gNB_DU_Configuration_Query, true);
 
   F1AP_F1AP_PDU_t *f1enc = encode_ue_context_mod_req(&orig);
   F1AP_F1AP_PDU_t *f1dec = f1ap_encode_decode(f1enc);