SDAP release DRB

openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c

@@ -1093,12 +1093,11 @@ void nr_pdcp_reconfigure_srb(ue_id_t ue_id, int srb_id, long t_Reordering)
   nr_pdcp_manager_unlock(nr_pdcp_ue_manager);
 }
 
-void nr_pdcp_reconfigure_drb(ue_id_t ue_id, int drb_id, long t_Reordering)
+void nr_pdcp_reconfigure_drb(ue_id_t ue_id, int drb_id, NR_PDCP_Config_t *pdcp_config, NR_SDAP_Config_t *sdap_config)
 {
-  /* The enabling/disabling of ciphering or integrity protection
-   * can be changed only by releasing and adding the DRB
-   * (so not by reconfiguring).
-   */
+  // The enabling/disabling of ciphering or integrity protection
+  // can be changed only by releasing and adding the DRB
+  // (so not by reconfiguring).
   nr_pdcp_manager_lock(nr_pdcp_ue_manager);
   nr_pdcp_ue_t *ue = nr_pdcp_manager_get_ue(nr_pdcp_ue_manager, ue_id);
   nr_pdcp_entity_t *drb = nr_pdcp_get_rb(ue, drb_id, false);
@@ -1107,8 +1106,33 @@ void nr_pdcp_reconfigure_drb(ue_id_t ue_id, int drb_id, long t_Reordering)
     nr_pdcp_manager_unlock(nr_pdcp_ue_manager);
     return;
   }
-  int decoded_t_reordering = decode_t_reordering(t_Reordering);
-  drb->t_reordering = decoded_t_reordering;
+  if (pdcp_config) {
+    if (pdcp_config->t_Reordering)
+      drb->t_reordering = decode_t_reordering(*pdcp_config->t_Reordering);
+    else
+      drb->t_reordering = -1;
+    struct NR_PDCP_Config__drb *drb_config = pdcp_config->drb;
+    if (drb_config) {
+      if (drb_config->discardTimer)
+        drb->discard_timer = decode_discard_timer(*drb_config->discardTimer);
+      bool size_set = false;
+      if (drb_config->pdcp_SN_SizeUL) {
+        drb->sn_size = decode_sn_size_ul(*drb_config->pdcp_SN_SizeUL);
+        size_set = true;
+      }
+      if (drb_config->pdcp_SN_SizeDL) {
+        int size = decode_sn_size_dl(*drb_config->pdcp_SN_SizeDL);
+        AssertFatal(!size_set || (size == drb->sn_size),
+                    "SN sizes must be the same. dl=%d, ul=%d",
+                    size, drb->sn_size);
+        drb->sn_size = size;
+      }
+    }
+  }
+  if (sdap_config) {
+    // nr_reconfigure_sdap_entity
+    AssertFatal(false, "Function to reconfigure SDAP entity not implemented yet\n");
+  }
   nr_pdcp_manager_unlock(nr_pdcp_ue_manager);
 }
 
@@ -1131,6 +1155,7 @@ void nr_pdcp_release_drb(ue_id_t ue_id, int drb_id)
   nr_pdcp_ue_t *ue = nr_pdcp_manager_get_ue(nr_pdcp_ue_manager, ue_id);
   nr_pdcp_entity_t *drb = ue->drb[drb_id - 1];
   if (drb) {
+    nr_sdap_release_drb(ue_id, drb_id, drb->pdusession_id);
     drb->release_entity(drb);
     drb->delete_entity(drb);
     ue->drb[drb_id - 1] = NULL;

openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.h

@@ -69,10 +69,11 @@ void nr_pdcp_reestablishment(ue_id_t ue_id, int rb_id, bool srb_flag);
 void nr_pdcp_suspend_srb(ue_id_t ue_id, int srb_id);
 void nr_pdcp_suspend_drb(ue_id_t ue_id, int drb_id);
 void nr_pdcp_reconfigure_srb(ue_id_t ue_id, int srb_id, long t_Reordering);
-void nr_pdcp_reconfigure_drb(ue_id_t ue_id, int drb_id, long t_Reordering);
+void nr_pdcp_reconfigure_drb(ue_id_t ue_id, int drb_id, NR_PDCP_Config_t *pdcp_config, NR_SDAP_Config_t *sdap_config);
 void nr_pdcp_release_srb(ue_id_t ue_id, int srb_id);
 void nr_pdcp_release_drb(ue_id_t ue_id, int drb_id);
 
+
 void add_srb(int is_gnb,
              ue_id_t rntiMaybeUEid,
              struct NR_SRB_ToAddMod *s,

openair2/RRC/NR_UE/rrc_UE.c

@@ -1256,8 +1256,9 @@ static void nr_rrc_ue_process_RadioBearerConfig(NR_UE_RRC_INST_t *ue_rrc,
       if (rrcNB->status_DRBs[DRB_id] == RB_ESTABLISHED) {
         AssertFatal(drb->reestablishPDCP == NULL, "reestablishPDCP not yet implemented\n");
         AssertFatal(drb->recoverPDCP == NULL, "recoverPDCP not yet implemented\n");
-        if (drb->pdcp_Config && drb->pdcp_Config->t_Reordering)
-          nr_pdcp_reconfigure_drb(rnti, DRB_id, *drb->pdcp_Config->t_Reordering);
+        NR_SDAP_Config_t *sdap_Config = drb->cnAssociation ? drb->cnAssociation->choice.sdap_Config : NULL;
+        if (drb->pdcp_Config || sdap_Config)
+          nr_pdcp_reconfigure_drb(rnti, DRB_id, drb->pdcp_Config, sdap_Config);
         if (drb->cnAssociation)
           AssertFatal(drb->cnAssociation->choice.sdap_Config == NULL, "SDAP reconfiguration not yet implemented\n");
       } else {

openair2/SDAP/nr_sdap/nr_sdap_entity.c

@@ -468,6 +468,21 @@ nr_sdap_entity_t *nr_sdap_get_entity(ue_id_t ue_id, int pdusession_id)
   return NULL;
 }
 
+void nr_sdap_release_drb(ue_id_t ue_id, int drb_id, int pdusession_id)
+{
+  // remove all QoS flow to DRB mappings associated with the released DRB
+  nr_sdap_entity_t *sdap = nr_sdap_get_entity(ue_id, pdusession_id);
+  if (sdap) {
+    for (int i = 0; i < SDAP_MAX_QFI; i++) {
+      if (sdap->qfi2drb_table[i].drb_id == drb_id)
+        sdap->qfi2drb_table[i].drb_id = SDAP_NO_MAPPING_RULE;
+    }
+  }
+  else
+    LOG_E(SDAP, "Couldn't find a SDAP entity associated with PDU session ID %d\n",
+          pdusession_id);
+}
+
 bool nr_sdap_delete_entity(ue_id_t ue_id, int pdusession_id)
 {
   nr_sdap_entity_t *entityPtr = sdap_info.sdap_entity_llist;

openair2/SDAP/nr_sdap/nr_sdap_entity.h

@@ -169,6 +169,8 @@ nr_sdap_entity_t *new_nr_sdap_entity(int is_gnb, bool has_sdap_rx, bool has_sdap
 /* Entity Handling Related Functions */
 nr_sdap_entity_t *nr_sdap_get_entity(ue_id_t ue_id, int pdusession_id);
 
+void nr_sdap_release_drb(ue_id_t ue_id, int drb_id, int pdusession_id);
+
 /**
  * @brief Function to delete a single SDAP Entity based on the ue_id and pdusession_id.
  * @note  1. SDAP entities may have the same ue_id.