Replace to itti timer.

Fix nnsf selection.
Fix indentation and opening brace.

openair3/S1AP/s1ap_eNB_handlers.c

@@ -290,8 +290,7 @@ int s1ap_eNB_handle_s1_setup_failure(uint32_t               assoc_id,
   S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupFailureIEs_t, ie, container,
                              S1AP_ProtocolIE_ID_id_Cause,true);
 
-  if(ie == NULL)
-  {
+  if(ie == NULL) {
     return -1;
   }
 
@@ -302,19 +301,16 @@ int s1ap_eNB_handle_s1_setup_failure(uint32_t               assoc_id,
     S1AP_ERROR("Received s1 setup failure for MME... please check your parameters\n");
   }
 
-  if( mme_desc_p->timer_id != S1AP_TIMERID_INIT )
-  {
+  if( mme_desc_p->timer_id != S1AP_TIMERID_INIT ) {
     s1ap_timer_remove( mme_desc_p->timer_id );
     mme_desc_p->timer_id = S1AP_TIMERID_INIT;
   }
   instance_p = mme_desc_p->s1ap_eNB_instance;
   if( ( instance_p->s1_setupreq_count >= mme_desc_p->s1_setupreq_cnt) ||
-      ( instance_p->s1_setupreq_count == 0xffff) )
-  {
+      ( instance_p->s1_setupreq_count == 0xffff) ) {
     S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupFailureIEs_t, ie, container,
                                S1AP_ProtocolIE_ID_id_TimeToWait, false);
-    if( ie != NULL )
-    {
+    if( ie != NULL ) {
       switch(ie->value.choice.TimeToWait)
       {
         case S1AP_TimeToWait_v1s:
@@ -339,9 +335,7 @@ int s1ap_eNB_handle_s1_setup_failure(uint32_t               assoc_id,
           interval_sec = instance_p->s1_setupreq_wait_timer;
           break;
       }
-    }
-    else
-    {
+    } else {
       interval_sec = instance_p->s1_setupreq_wait_timer;
     }
     
@@ -350,15 +344,11 @@ int s1ap_eNB_handle_s1_setup_failure(uint32_t               assoc_id,
     timer_kind = timer_kind | S1_SETREQ_WAIT;
     
     if( s1ap_timer_setup(interval_sec, 0, TASK_S1AP, instance_p->instance, timer_kind, S1AP_TIMER_ONE_SHOT,
-      NULL, &mme_desc_p->timer_id) < 0 )
-    {
+      NULL, &mme_desc_p->timer_id) < 0 ) {
       S1AP_ERROR("Timer Start NG(S1 Setup Request) : MME=%d\n",mme_desc_p->cnx_id);
-      
       s1ap_eNB_snd_s1_setup_request( instance_p, mme_desc_p );
     }
-  }
-  else
-  {
+  } else {
     S1AP_ERROR("Retransmission count exceeded of S1 SETUP REQUEST : MME=%d\n",mme_desc_p->cnx_id);
   }
   return 0;
@@ -391,16 +381,14 @@ int s1ap_eNB_handle_s1_setup_response(uint32_t               assoc_id,
   /* Set the capacity of this MME */
   S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupResponseIEs_t, ie, container,
                              S1AP_ProtocolIE_ID_id_RelativeMMECapacity, true);
-  if(ie == NULL)
-  {
+  if(ie == NULL) {
     return -1;
   }
   mme_desc_p->relative_mme_capacity = ie->value.choice.RelativeMMECapacity;
 
   S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupResponseIEs_t, ie, container,
                              S1AP_ProtocolIE_ID_id_ServedGUMMEIs, true);
-  if(ie == NULL)
-  {
+  if(ie == NULL) {
     return -1;
   }
 
@@ -463,12 +451,6 @@ int s1ap_eNB_handle_s1_setup_response(uint32_t               assoc_id,
     STAILQ_INSERT_TAIL(&mme_desc_p->served_gummei, new_gummei_p, next);
   }
   
-  /* Set the capacity of this MME */
-//  S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupResponseIEs_t, ie, container,
-//                             S1AP_ProtocolIE_ID_id_RelativeMMECapacity, true);
-//
-//  mme_desc_p->relative_mme_capacity = ie->value.choice.RelativeMMECapacity;
-//
   /* Optionaly set the mme name */
   S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_S1SetupResponseIEs_t, ie, container,
                              S1AP_ProtocolIE_ID_id_MMEname, false);
@@ -486,7 +468,6 @@ int s1ap_eNB_handle_s1_setup_response(uint32_t               assoc_id,
    */
   mme_desc_p->state = S1AP_ENB_STATE_CONNECTED;
   mme_desc_p->s1ap_eNB_instance->s1ap_mme_associated_nb ++;
-//  s1ap_handle_s1_setup_message(mme_desc_p, 0);
   return 0;
 }
 
@@ -819,8 +800,7 @@ int s1ap_eNB_handle_error_indication(uint32_t         assoc_id,
                              S1AP_ProtocolIE_ID_id_CriticalityDiagnostics, false);
 
   if (ie) {
-    if( ie->value.choice.CriticalityDiagnostics.procedureCode )
-    {
+    if( ie->value.choice.CriticalityDiagnostics.procedureCode ) {
       S1AP_WARN("Received S1 Error indication CriticalityDiagnostics procedureCode = %ld\n", *ie->value.choice.CriticalityDiagnostics.procedureCode);
     }
     // TODO continue
@@ -1023,8 +1003,7 @@ int s1ap_eNB_handle_ue_context_release_command(uint32_t   assoc_id,
 
   S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_UEContextReleaseCommand_IEs_t, ie, container,
                              S1AP_ProtocolIE_ID_id_Cause, true);
-  if( ie == NULL )
-  {
+  if( ie == NULL ) {
     S1AP_ERROR( "Mandatory Element Nothing : UEContextReleaseCommand(Cause)\n" );
     return -1;
   }
@@ -1076,9 +1055,6 @@ int s1ap_eNB_handle_ue_context_release_command(uint32_t   assoc_id,
       //#warning "TODO mapping mme_ue_s1ap_id  enb_ue_s1ap_id?"
 
       case S1AP_UE_S1AP_IDs_PR_mME_UE_S1AP_ID:
-//        mme_ue_s1ap_id = ie->value.choice.UE_S1AP_IDs.choice.uE_S1AP_ID_pair.mME_UE_S1AP_ID;
-//        S1AP_ERROR("TO DO mapping mme_ue_s1ap_id  enb_ue_s1ap_id");
-//        (void)mme_ue_s1ap_id; /* TODO: remove - it's to remove gcc warning about unused var */
         mme_ue_s1ap_id = ie->value.choice.UE_S1AP_IDs.choice.mME_UE_S1AP_ID;
         
         RB_FOREACH(ue_desc_p, s1ap_ue_map, &mme_desc_p->s1ap_eNB_instance->s1ap_ue_head)
@@ -1087,7 +1063,7 @@ int s1ap_eNB_handle_ue_context_release_command(uint32_t   assoc_id,
           {
             enb_ue_s1ap_id = ue_desc_p->eNB_ue_s1ap_id;
             
-            message_p = itti_alloc_new_message(TASK_S1AP, S1AP_UE_CONTEXT_RELEASE_COMMAND);
+            message_p = itti_alloc_new_message(TASK_S1AP, 0, S1AP_UE_CONTEXT_RELEASE_COMMAND);
             S1AP_UE_CONTEXT_RELEASE_COMMAND(message_p).eNB_ue_s1ap_id = enb_ue_s1ap_id;
             itti_send_msg_to_task(TASK_RRC_ENB, ue_desc_p->eNB_instance->instance, message_p);
             

openair3/S1AP/s1ap_eNB_management_procedures.c

@@ -102,8 +102,7 @@ struct s1ap_eNB_mme_data_s *s1ap_eNB_get_MME(
   temp.assoc_id = assoc_id;
   temp.cnx_id   = cnx_id;
 
-  if( cnx_id != 0 )
-  {
+  if( cnx_id != 0 ) {
     if (instance_p == NULL) {
       STAILQ_FOREACH(instance_p, &s1ap_eNB_internal_data.s1ap_eNB_instances_head,
                      s1ap_eNB_entries) {
@@ -116,29 +115,19 @@ struct s1ap_eNB_mme_data_s *s1ap_eNB_get_MME(
     } else {
       return RB_FIND(s1ap_mme_map, &instance_p->s1ap_mme_head, &temp);
     }
-  }
-  else
-  {
-    if (instance_p == NULL)
-    {
+  } else {
+    if (instance_p == NULL) {
       STAILQ_FOREACH(instance_p, &s1ap_eNB_internal_data.s1ap_eNB_instances_head,
-                     s1ap_eNB_entries)
-      {
-        RB_FOREACH(mme_p, s1ap_mme_map, &instance_p->s1ap_mme_head)
-        {
-          if( mme_p->assoc_id == assoc_id )
-          {
+                     s1ap_eNB_entries) {
+        RB_FOREACH(mme_p, s1ap_mme_map, &instance_p->s1ap_mme_head) {
+          if( mme_p->assoc_id == assoc_id ) {
             return mme_p;
           }
         }
       }
-    }
-    else
-    {
-      RB_FOREACH(mme_p, s1ap_mme_map, &instance_p->s1ap_mme_head)
-      {
-        if( mme_p->assoc_id == assoc_id )
-        {
+    } else {
+      RB_FOREACH(mme_p, s1ap_mme_map, &instance_p->s1ap_mme_head) {
+        if( mme_p->assoc_id == assoc_id ) {
           return mme_p;
         }
       }

openair3/S1AP/s1ap_eNB_nas_procedures.c

@@ -139,8 +139,7 @@ int s1ap_eNB_handle_nas_first_req(
          */
         mme_desc_p = s1ap_eNB_nnsf_select_mme(
                        instance_p,
-                       s1ap_nas_first_req_p->establishment_cause,
-                       s1ap_nas_first_req_p->selected_plmn_identity);
+                       s1ap_nas_first_req_p->establishment_cause);
 
         if (mme_desc_p) {
             S1AP_INFO("[eNB %ld] Chose MME '%s' (assoc_id %d) through highest relative capacity\n",
@@ -233,9 +232,9 @@ int s1ap_eNB_handle_nas_first_req(
     MACRO_ENB_ID_TO_CELL_IDENTITY(instance_p->eNB_id,
                                   0, // Cell ID
                                   &ie->value.choice.EUTRAN_CGI.cell_ID);
-    MCC_MNC_TO_TBCD(instance_p->mcc[mme_desc_p->broadcast_plmn_index[0]],
-                    instance_p->mnc[mme_desc_p->broadcast_plmn_index[0]],
-                    instance_p->mnc_digit_length[mme_desc_p->broadcast_plmn_index[0]],
+    MCC_MNC_TO_TBCD(instance_p->mcc[ue_desc_p->selected_plmn_identity],
+                    instance_p->mnc[ue_desc_p->selected_plmn_identity],
+                    instance_p->mnc_digit_length[ue_desc_p->selected_plmn_identity],
                     &ie->value.choice.EUTRAN_CGI.pLMNidentity);
     ASN_SEQUENCE_ADD(&out->protocolIEs.list, ie);
     /* Set the establishment cause according to those provided by RRC */

openair3/S1AP/s1ap_eNB_nnsf.c

@@ -36,17 +36,18 @@
 #include "s1ap_eNB_defs.h"
 #include "s1ap_eNB_nnsf.h"
 
+
+typedef struct MME_nnsf_inf {
+  struct s1ap_eNB_mme_data_s *mme_p;
+  uint64_t weight;
+} MME_nnsf_inf_t;
+
 struct s1ap_eNB_mme_data_s *
 s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
-                         rrc_establishment_cause_t  cause,
-                         uint32_t                   plmn_id)
+                         rrc_establishment_cause_t  cause)
 {
   struct s1ap_eNB_mme_data_s *mme_data_p = NULL;
   struct s1ap_eNB_mme_data_s *mme_highest_capacity_p = NULL;
-  typedef struct MME_nnsf_inf {
-    struct s1ap_eNB_mme_data_s *mme_p;
-    uint64_t weight;
-  } MME_nnsf_inf_t;
   
   uint16_t capacity_sum = 0;
   MME_nnsf_inf_t mme_inf[10];
@@ -57,7 +58,6 @@ s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
   memset(mme_inf, 0, sizeof(mme_inf));
   
   RB_FOREACH(mme_data_p, s1ap_mme_map, &instance_p->s1ap_mme_head) {
-    struct served_gummei_s *gummei_p = NULL;
     capacity_sum = capacity_sum + mme_data_p->relative_mme_capacity;
     if (mme_data_p->state != S1AP_ENB_STATE_CONNECTED) {
       /* The association between MME and eNB is not ready for the moment,
@@ -83,7 +83,8 @@ s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
                 || (cause == RRC_CAUSE_HIGH_PRIO_ACCESS))) {
           continue;
         }
-
+        mme_inf[nb_mme].mme_p = mme_data_p;
+        nb_mme++;
         /* At this point, the RRC establishment can be handled by the MME
          * even if it is in overload state.
          */
@@ -92,58 +93,27 @@ s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
         continue;
       }
     }
-
-    gummei_p = mme_data_p->served_gummei.stqh_first;
-    if( gummei_p != NULL )
-    {
-      struct plmn_identity_s *served_plmns_p = NULL;
-
-      served_plmns_p = gummei_p->served_plmns.stqh_first;
-      if( served_plmns_p != 0 )
-      for( cnt = 0 ; cnt < 8 ; cnt++)
-      {
-        if ( (served_plmns_p->mcc == instance_p->mcc[plmn_id]) &&
-          (served_plmns_p->mnc == instance_p->mnc[plmn_id]) )
-        {
-          mme_inf[nb_mme].mme_p = mme_data_p;
-          nb_mme++;
-          break;
-        }
-        if( served_plmns_p->next.stqe_next == 0 )
-        {
-          break;
-        }
-        served_plmns_p = served_plmns_p->next.stqe_next;
-      }
-    }
   }
-  if( nb_mme != 0 )
-  {
-    for( cnt = 0 ; cnt < nb_mme ; cnt++ )
-    {
+  
+  if( nb_mme != 0 ) {
+    for( cnt = 0 ; cnt < nb_mme ; cnt++ ) {
       mme_inf[cnt].weight = (capacity_sum*10)/mme_inf[cnt].mme_p->relative_mme_capacity;
       mme_inf[cnt].weight = (mme_inf[cnt].weight)*(mme_inf[cnt].mme_p->nb_calls + 1);
     }
     mme_highest_capacity_p = mme_inf[0].mme_p;
     weight = mme_inf[0].weight;
-    for( cnt = 1 ; cnt < nb_mme ; cnt++ )
-    {
-      if( weight > mme_inf[cnt].weight )
-      {
+    for( cnt = 1 ; cnt < nb_mme ; cnt++ ) {
+      if( weight > mme_inf[cnt].weight ) {
         mme_highest_capacity_p = mme_inf[cnt].mme_p;
         weight = mme_inf[cnt].weight;
       }
     }
-  }
-  else
-  {
+  } else {
     mme_highest_capacity_p = NULL;
   }
-  if( mme_highest_capacity_p != NULL )
-  {
+  if( mme_highest_capacity_p != NULL ) {
     mme_highest_capacity_p->nb_calls++;
   }
-
   return mme_highest_capacity_p;
 }
 
@@ -154,7 +124,14 @@ s1ap_eNB_nnsf_select_mme_by_plmn_id(s1ap_eNB_instance_t       *instance_p,
 {
   struct s1ap_eNB_mme_data_s *mme_data_p = NULL;
   struct s1ap_eNB_mme_data_s *mme_highest_capacity_p = NULL;
-  uint8_t current_capacity = 0;
+  
+  uint16_t capacity_sum = 0;
+  MME_nnsf_inf_t mme_inf[10];
+  int       cnt;
+  int       nb_mme = 0;
+  uint64_t  weight = 0;
+  
+  memset(mme_inf, 0, sizeof(mme_inf));
   
   RB_FOREACH(mme_data_p, s1ap_mme_map, &instance_p->s1ap_mme_head) {
     struct served_gummei_s *gummei_p = NULL;
@@ -198,6 +175,8 @@ s1ap_eNB_nnsf_select_mme_by_plmn_id(s1ap_eNB_instance_t       *instance_p,
       STAILQ_FOREACH(served_plmn_p, &gummei_p->served_plmns, next) {
         if ((served_plmn_p->mcc == instance_p->mcc[selected_plmn_identity]) &&
             (served_plmn_p->mnc == instance_p->mnc[selected_plmn_identity])) {
+          mme_inf[nb_mme].mme_p = mme_data_p;
+          nb_mme++;
           break;
         }
       }
@@ -206,14 +185,27 @@ s1ap_eNB_nnsf_select_mme_by_plmn_id(s1ap_eNB_instance_t       *instance_p,
     }
     /* if we didn't find such a served PLMN, go on with the next MME */
     if (!served_plmn_p) continue;
+  }
 
-    if (current_capacity < mme_data_p->relative_mme_capacity) {
-      /* We find a better MME, keep a reference to it */
-      current_capacity = mme_data_p->relative_mme_capacity;
-      mme_highest_capacity_p = mme_data_p;
+  if( nb_mme != 0 ) {
+    for( cnt = 0 ; cnt < nb_mme ; cnt++ ) {
+      mme_inf[cnt].weight = (capacity_sum*10)/mme_inf[cnt].mme_p->relative_mme_capacity;
+      mme_inf[cnt].weight = (mme_inf[cnt].weight)*(mme_inf[cnt].mme_p->nb_calls + 1);
     }
+    mme_highest_capacity_p = mme_inf[0].mme_p;
+    weight = mme_inf[0].weight;
+    for( cnt = 1 ; cnt < nb_mme ; cnt++ ) {
+      if( weight > mme_inf[cnt].weight ) {
+        mme_highest_capacity_p = mme_inf[cnt].mme_p;
+        weight = mme_inf[cnt].weight;
+      }
+    }
+  } else {
+    mme_highest_capacity_p = NULL;
+  }
+  if( mme_highest_capacity_p != NULL ) {
+    mme_highest_capacity_p->nb_calls++;
   }
-
   return mme_highest_capacity_p;
 }
 

openair3/S1AP/s1ap_eNB_nnsf.h

@@ -24,8 +24,7 @@
 
 struct s1ap_eNB_mme_data_s *
 s1ap_eNB_nnsf_select_mme(s1ap_eNB_instance_t       *instance_p,
-                         rrc_establishment_cause_t  cause,
-                         uint32_t                   plmn_id);
+                         rrc_establishment_cause_t  cause);
 
 struct s1ap_eNB_mme_data_s *
 s1ap_eNB_nnsf_select_mme_by_plmn_id(s1ap_eNB_instance_t       *instance_p,

openair3/S1AP/s1ap_eNB_timer.c

@@ -36,91 +36,6 @@
 #include "queue.h"
 #include "s1ap_common.h"
 
-struct s1ap_timer_elm_s {
-  task_id_t                 task_id;    ///< Task ID which has requested the timer
-  int32_t                   instance;   ///< Instance of the task which has requested the timer
-  uint32_t                  timer_kind; ///< Instance of the task which has requested the timer
-  timer_t                   timer;      ///< Unique timer id
-  timer_type_t              type;       ///< Timer type
-  void                     *timer_arg;  ///< Optional argument that will be passed when timer expires
-  STAILQ_ENTRY(s1ap_timer_elm_s) entries;    ///< Pointer to next element
-};
-
-typedef struct timer_desc_s {
-  STAILQ_HEAD(timer_list_head, s1ap_timer_elm_s) timer_queue;
-  pthread_mutex_t timer_list_mutex;
-  struct timespec timeout;
-} timer_desc_t;
-
-static timer_desc_t timer_desc;
-
-#define TIMER_SEARCH(vAR, tIMERfIELD, tIMERvALUE, tIMERqUEUE)   \
-do {                                                            \
-    STAILQ_FOREACH(vAR, tIMERqUEUE, entries) {                  \
-    if (((vAR)->tIMERfIELD == tIMERvALUE))                  \
-            break;                                              \
-    }                                                           \
-} while(0)
-
-int s1ap_timer_timeout(sigval_t info)
-{
-  struct s1ap_timer_elm_s   *timer_p;
-  MessageDef                *message_p;
-  s1ap_timer_has_expired_t  *timer_expired_p;
-  task_id_t                 task_id;
-  int32_t                   instance;
-  uint32_t                  timer_kind;
-  
-  timer_kind = info.sival_int;
-  if( pthread_mutex_lock(&timer_desc.timer_list_mutex) != 0 )
-  {
-    S1AP_ERROR("Failed to mutex lock timeout=%x\n", timer_kind);
-    
-    return -1;
-  }
-  TIMER_SEARCH(timer_p, timer_kind, timer_kind, &timer_desc.timer_queue);
-  
-  if( pthread_mutex_unlock(&timer_desc.timer_list_mutex) != 0 )
-  {
-    S1AP_ERROR("Failed to mutex unlock timeout=0x%x\n", timer_kind);
-  }
-  if (timer_p == NULL)
-  {
-    S1AP_ERROR("Didn't find timer 0x%x in list\n", timer_kind);
-    
-    return -1;
-  }
-  S1AP_DEBUG("Timer kind 0x%x has expired\n", timer_kind);
-  
-  task_id = timer_p->task_id;
-  instance = timer_p->instance;
-  message_p = itti_alloc_new_message(TASK_UNKNOWN, TIMER_HAS_EXPIRED);
-  
-  timer_expired_p = (s1ap_timer_has_expired_t *)(&message_p->ittiMsg.timer_has_expired);
-  
-  timer_expired_p->timer_id   = (long)timer_p->timer;
-  timer_expired_p->timer_kind = timer_p->timer_kind;
-  timer_expired_p->arg        = timer_p->timer_arg;
-  
-  /* Timer is a one shot timer, remove it */
-  if( (int)timer_p->type == (int)S1AP_TIMER_ONE_SHOT )
-  {
-    if( s1ap_timer_remove((long)timer_p->timer) != 0 )
-    {
-      S1AP_DEBUG("Failed to delete timer 0x%lx\n", (long)timer_p->timer);
-    }
-  }
-  
-  /* Notify task of timer expiry */
-  if( itti_send_msg_to_task(task_id, instance, message_p) < 0 )
-  {
-    S1AP_ERROR("Failed to send msg TIMER_HAS_EXPIRED to task %u\n", task_id);
-    free(message_p);
-    return -1;
-  }
-  
-  return 0;
-}
 
 int s1ap_timer_setup(
   uint32_t      interval_sec,
@@ -132,169 +47,24 @@ int s1ap_timer_setup(
   void         *timer_arg,
   long         *timer_id)
 {
-  struct sigevent          evp;
-  struct itimerspec        its;
-  struct s1ap_timer_elm_s  *timer_p;
-  timer_t                  timer;
-  
-  if( timer_id == NULL )
-  {
-    S1AP_ERROR("Invalid timer_id\n");
-    return -1;
-  }
-  
-  if( (int)type >= (int)S1AP_TIMER_TYPE_MAX )
-  {
-    S1AP_ERROR("Invalid timer type (%d/%d)!\n", type, TIMER_TYPE_MAX);
-    return -1;
-  }
-  
-  if( *timer_id != S1AP_TIMERID_INIT )
-  {
-    if( s1ap_timer_remove(*timer_id) != 0 )
-    {
-      S1AP_ERROR("Failed to delete timer when the timer start 0x%lx\n", *timer_id);
-    }
-  }
-  
-  /* Allocate new timer list element */
-  timer_p = malloc(sizeof(struct s1ap_timer_elm_s));
-  
-  if( timer_p == NULL )
-  {
-    S1AP_ERROR("Failed to create new timer element\n");
-    return -1;
-  }
-  
-  memset(&timer, 0, sizeof(timer_t));
-  memset(&evp, 0, sizeof(evp));
-  
-  timer_p->task_id    = task_id;
-  timer_p->instance   = instance;
-  timer_p->timer_kind = timer_kind;
-  timer_p->type       = type;
-  timer_p->timer_arg  = timer_arg;
-  
-  evp.sigev_notify            = (int)SIGEV_THREAD;
-  evp.sigev_notify_function   = (void *)s1ap_timer_timeout;
-  evp.sigev_signo             = SIGRTMIN;
-  evp.sigev_notify_attributes = NULL;
-  evp.sigev_value.sival_int   = timer_kind;
-  
-  /* At the timer creation, the timer structure will be filled in with timer_id,
-   * which is unique for this process. This id is allocated by kernel and the
-   * value might be used to distinguish timers.
-   */
-  if( timer_create(CLOCK_REALTIME, &evp, &timer) < 0 )
-  {
-    S1AP_ERROR("Failed to create timer: (%s:%d)\n", strerror(errno), errno);
-    free(timer_p);
-    return -1;
-  }
-  
-  /* Fill in the first expiration value. */
-  its.it_value.tv_sec  = interval_sec;
-  its.it_value.tv_nsec = interval_us * 1000;
-  
-  if( (int)type == (int)S1AP_TIMER_PERIODIC )
-  {
-    /* Asked for periodic timer. We set the interval time */
-    its.it_interval.tv_sec  = interval_sec;
-    its.it_interval.tv_nsec = interval_us * 1000;
-  }
-  else
-  {
-    /* Asked for one-shot timer. Do not set the interval field */
-    its.it_interval.tv_sec  = 0;
-    its.it_interval.tv_nsec = 0;
-  }
-  
-  if( timer_settime(timer, 0, &its, NULL) )
-  {
-    S1AP_ERROR("Failed to Settimer: (%s:%d)\n", strerror(errno), errno);
-    free(timer_p);
-    return -1;
-  }
-  
-  /* Simply set the timer_id argument. so it can be used by caller */
-  *timer_id = (long)timer;
-  
-  timer_p->timer = timer;
-  
-  /* Lock the queue and insert the timer at the tail */
-  if( pthread_mutex_lock(&timer_desc.timer_list_mutex) != 0 )
-  {
-    S1AP_ERROR("Failed to mutex lock\n");
-    if( timer_delete(timer_p->timer) < 0 )
-    {
-      S1AP_ERROR("Failed to delete timer 0x%lx\n", (long)timer_p->timer);
-    }
-    free(timer_p);
-    timer_p = NULL;
-    
-    return -1;
-  }
-  
-  STAILQ_INSERT_TAIL(&timer_desc.timer_queue, timer_p, entries);
-  if( pthread_mutex_unlock(&timer_desc.timer_list_mutex) != 0 )
-  {
-    S1AP_ERROR("Failed to mutex unlock\n");
-  }
-  
-  return 0;
+  uint32_t *timeoutArg=NULL;
+  int ret=0;
+  timeoutArg=malloc(sizeof(uint32_t));
+  *timeoutArg=timer_kind;
+  ret=timer_setup(interval_sec,
+                interval_us,
+                task_id,
+                instance,
+                type,
+                (void*)timeoutArg,
+                timer_id);
+  return ret;
 }
 
 int s1ap_timer_remove(long timer_id)
 {
-  int rc = 0;
-  struct s1ap_timer_elm_s *timer_p;
-  
-  
-  if( pthread_mutex_lock(&timer_desc.timer_list_mutex) != 0 )
-  {
-    S1AP_ERROR("Failed to mutex lock\n");
-    if( timer_delete((timer_t)timer_id) < 0 )
-    {
-      S1AP_ERROR("Failed to delete timer 0x%lx\n", (long)timer_id);
-    }
-    
-    return -1;
-  }
-  
-  TIMER_SEARCH(timer_p, timer, ((timer_t)timer_id), &timer_desc.timer_queue);
-  
-  /* We didn't find the timer in list */
-  if (timer_p == NULL)
-  {
-    S1AP_ERROR("Didn't find timer 0x%lx in list\n", timer_id);
-    if( pthread_mutex_unlock(&timer_desc.timer_list_mutex) != 0 )
-    {
-      S1AP_ERROR("Failed to mutex unlock\n");
-    }
-    
-    return -1;
-  }
-  
-  timer_delete(timer_p->timer);
-  
-  STAILQ_REMOVE(&timer_desc.timer_queue, timer_p, s1ap_timer_elm_s, entries);
-  
-  if( pthread_mutex_unlock(&timer_desc.timer_list_mutex) != 0 )
-  {
-    S1AP_ERROR("Failed to mutex unlock\n");
-  }
-  
-  free(timer_p);
-  timer_p = NULL;
-  return rc;
+  int ret;
+  ret=timer_remove(timer_id);
+  return ret;
 }
 
-int s1ap_timer_init(void)
-{
-  memset(&timer_desc, 0, sizeof(timer_desc_t));
-  
-  STAILQ_INIT(&timer_desc.timer_queue);
-  pthread_mutex_init(&timer_desc.timer_list_mutex, NULL);
-  
-  return 0;
-}