Add S1down auto recovery.

(cherry picked from commit 2339972ceaeb75fe18c0b2ae9ea69216dd919668)

cmake_targets/CMakeLists.txt

@@ -540,6 +540,7 @@ add_library(S1AP_ENB
   ${S1AP_DIR}/s1ap_eNB_overload.c
   ${S1AP_DIR}/s1ap_eNB_trace.c
   ${S1AP_DIR}/s1ap_eNB_ue_context.c
+  ${S1AP_DIR}/s1ap_eNB_timer.c
   )
 add_dependencies(S1AP_ENB rrc_flag s1ap_flag)
 

openair2/COMMON/s1ap_messages_types.h

@@ -393,6 +393,11 @@ typedef struct s1ap_register_enb_req_s {
   /* Number of SCTP streams used for a mme association */
   uint16_t sctp_in_streams;
   uint16_t sctp_out_streams;
+  uint16_t s1_setuprsp_wait_timer;
+  uint16_t s1_setupreq_wait_timer;
+  uint16_t s1_setupreq_count;
+  uint16_t sctp_req_timer;
+  uint16_t sctp_req_count;
 } s1ap_register_enb_req_t;
 
 //-------------------------------------------------------------------------------------------//

openair2/COMMON/tasks_def.h

@@ -47,7 +47,8 @@ TASK_DEF(TASK_RAL_ENB, TASK_PRIORITY_MED, 200)
 TASK_DEF(TASK_UDP,      TASK_PRIORITY_MED,          1000)
 // GTP_V1U task
 TASK_DEF(TASK_GTPV1_U,  TASK_PRIORITY_MED,          1000)
-TASK_DEF(TASK_S1AP,     TASK_PRIORITY_MED,          200)
+//TASK_DEF(TASK_S1AP,     TASK_PRIORITY_MED,          200)
+TASK_DEF(TASK_S1AP,     TASK_PRIORITY_MED,         2000)
 TASK_DEF(TASK_CU_F1,     TASK_PRIORITY_MED,          200)
 TASK_DEF(TASK_DU_F1,     TASK_PRIORITY_MED,          200)
 ///   M3ap task, acts as both source and target

openair2/X2AP/x2ap_common.h

@@ -84,7 +84,7 @@ extern int asn1_xer_print;
         break; \
       } \
     } \
-    if (mandatory) DevAssert(ie != NULL); \
+/*    if (mandatory) DevAssert(ie != NULL); \*/ \
   } while(0)
 
 /** \brief Function callback prototype.

openair2/X2AP/x2ap_eNB_handler.c

@@ -536,6 +536,14 @@ int x2ap_eNB_handle_x2_setup_response(instance_t instance,
     return -1;
   }
 
+  if((x2ap_eNB_data->state == X2AP_ENB_STATE_CONNECTED) ||
+     (x2ap_eNB_data->state == X2AP_ENB_STATE_READY))
+  
+  {
+    X2AP_ERROR("Received Unexpexted X2 Setup Response Message\n");
+    return -1;
+  }
+
   X2AP_DEBUG("Received a new X2 setup response\n");
 
   X2AP_FIND_PROTOCOLIE_BY_ID(X2AP_X2SetupResponse_IEs_t, ie, x2SetupResponse,
@@ -662,6 +670,14 @@ int x2ap_eNB_handle_x2_setup_failure(instance_t instance,
     return -1;
   }
 
+  if((x2ap_eNB_data->state == X2AP_ENB_STATE_CONNECTED) ||
+     (x2ap_eNB_data->state == X2AP_ENB_STATE_READY))
+  
+  {
+    X2AP_ERROR("Received Unexpexted X2 Setup Failure Message\n");
+    return -1;
+  }
+
   X2AP_DEBUG("Received a new X2 setup failure\n");
 
   X2AP_FIND_PROTOCOLIE_BY_ID(X2AP_X2SetupFailure_IEs_t, ie, x2SetupFailure,
@@ -730,6 +746,7 @@ int x2ap_eNB_handle_handover_preparation (instance_t instance,
                              X2AP_ProtocolIE_ID_id_Old_eNB_UE_X2AP_ID, true);
   if (ie == NULL ) {
     X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
     return -1;
   }
 
@@ -750,7 +767,11 @@ int x2ap_eNB_handle_handover_preparation (instance_t instance,
                                                //measResultListEUTRA.list.array[ncell_index]->physCellId;
   X2AP_FIND_PROTOCOLIE_BY_ID(X2AP_HandoverRequest_IEs_t, ie, x2HandoverRequest,
                              X2AP_ProtocolIE_ID_id_GUMMEI_ID, true);
-
+  if (ie == NULL ) {
+    X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
+    return -1;
+  }
   TBCD_TO_MCC_MNC(&ie->value.choice.ECGI.pLMN_Identity, X2AP_HANDOVER_REQ(msg).ue_gummei.mcc,
                   X2AP_HANDOVER_REQ(msg).ue_gummei.mnc, X2AP_HANDOVER_REQ(msg).ue_gummei.mnc_len);
   OCTET_STRING_TO_INT8(&ie->value.choice.GUMMEI.mME_Code, X2AP_HANDOVER_REQ(msg).ue_gummei.mme_code);
@@ -761,6 +782,7 @@ int x2ap_eNB_handle_handover_preparation (instance_t instance,
 
   if (ie == NULL ) {
     X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
     return -1;
   }
 
@@ -872,6 +894,7 @@ int x2ap_eNB_handle_handover_response (instance_t instance,
 
   if (ie == NULL ) {
     X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
     return -1;
   }
 
@@ -882,6 +905,7 @@ int x2ap_eNB_handle_handover_response (instance_t instance,
 
   if (ie == NULL ) {
     X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
     return -1;
   }
 
@@ -912,6 +936,7 @@ int x2ap_eNB_handle_handover_response (instance_t instance,
 
   if (ie == NULL ) {
     X2AP_ERROR("%s %d: ie is a NULL pointer \n", __FILE__, __LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
     return -1;
   }else{
     if (ie->value.choice.E_RABs_Admitted_List.list.count > 0) {
@@ -959,6 +984,12 @@ int x2ap_eNB_handle_handover_response (instance_t instance,
   X2AP_FIND_PROTOCOLIE_BY_ID(X2AP_HandoverRequestAcknowledge_IEs_t, ie, x2HandoverRequestAck,
                              X2AP_ProtocolIE_ID_id_TargeteNBtoSource_eNBTransparentContainer, true);
 
+  if (ie == NULL ) {
+    X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
+    return -1;
+  }
+
   X2AP_TargeteNBtoSource_eNBTransparentContainer_t *c = &ie->value.choice.TargeteNBtoSource_eNBTransparentContainer;
 
   if (c->size > 1024 /* TODO: this is the size of rrc_buffer in struct x2ap_handover_req_ack_s */)
@@ -1012,6 +1043,7 @@ int x2ap_eNB_handle_ue_context_release (instance_t instance,
 
   if (ie == NULL ) {
     X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
     return -1;
   }
 
@@ -1022,6 +1054,7 @@ int x2ap_eNB_handle_ue_context_release (instance_t instance,
 
   if (ie == NULL ) {
     X2AP_ERROR("%s %d: ie is a NULL pointer \n",__FILE__,__LINE__);
+    itti_free(ITTI_MSG_ORIGIN_ID(msg), msg);
     return -1;
   }
 

openair3/S1AP/s1ap_common.h

@@ -106,7 +106,12 @@ extern int asn1_xer_print;
     if (ie == NULL ) { \
       S1AP_ERROR("S1AP_FIND_PROTOCOLIE_BY_ID: %s %d: ie is NULL\n",__FILE__,__LINE__);\
     } \
-    if (mandatory)  DevAssert(ie != NULL); \
+    if (mandatory) { \
+      if (ie == NULL) { \
+        S1AP_ERROR("S1AP_FIND_PROTOCOLIE_BY_ID: %s %d: ie is NULL\n",__FILE__,__LINE__);\
+        return -1; \
+      } \
+    } \
   } while(0)
 /** \brief Function callback prototype.
  **/

openair3/S1AP/s1ap_eNB_defs.h

@@ -166,6 +166,10 @@ typedef struct s1ap_eNB_mme_data_s {
   struct s1ap_eNB_instance_s *s1ap_eNB_instance;
   
   uint32_t nb_calls;
+  net_ip_address_t mme_ip_address;
+  long             timer_id;
+  uint16_t         s1_setupreq_cnt;
+  uint16_t         sctp_req_cnt;
 } s1ap_eNB_mme_data_t;
 
 typedef struct s1ap_eNB_instance_s {
@@ -218,6 +222,14 @@ typedef struct s1ap_eNB_instance_s {
 
   /* Default Paging DRX of the eNB as defined in TS 36.304 */
   paging_drx_t default_drx;
+  net_ip_address_t   enb_ip_address;
+  uint16_t           s1_setuprsp_wait_timer;
+  uint16_t           s1_setupreq_wait_timer;
+  uint16_t           s1_setupreq_count;
+  uint16_t           sctp_req_timer;
+  uint16_t           sctp_req_count;
+  uint16_t           sctp_in_streams;
+  uint16_t           sctp_out_streams;
 } s1ap_eNB_instance_t;
 
 typedef struct {

openair3/S1AP/s1ap_eNB_management_procedures.c

@@ -95,23 +95,54 @@ struct s1ap_eNB_mme_data_s *s1ap_eNB_get_MME(
 {
   struct s1ap_eNB_mme_data_s  temp;
   struct s1ap_eNB_mme_data_s *found;
+  struct s1ap_eNB_mme_data_s *mme_p;
 
   memset(&temp, 0, sizeof(struct s1ap_eNB_mme_data_s));
 
   temp.assoc_id = assoc_id;
   temp.cnx_id   = cnx_id;
 
-  if (instance_p == NULL) {
-    STAILQ_FOREACH(instance_p, &s1ap_eNB_internal_data.s1ap_eNB_instances_head,
-                   s1ap_eNB_entries) {
-      found = RB_FIND(s1ap_mme_map, &instance_p->s1ap_mme_head, &temp);
+  if( cnx_id != 0 )
+  {
+    if (instance_p == NULL) {
+      STAILQ_FOREACH(instance_p, &s1ap_eNB_internal_data.s1ap_eNB_instances_head,
+                     s1ap_eNB_entries) {
+        found = RB_FIND(s1ap_mme_map, &instance_p->s1ap_mme_head, &temp);
 
-      if (found != NULL) {
-        return found;
+        if (found != NULL) {
+          return found;
+        }
+      }
+    } else {
+      return RB_FIND(s1ap_mme_map, &instance_p->s1ap_mme_head, &temp);
+    }
+  }
+  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 )
+          {
+            return mme_p;
+          }
+        }
+      }
+    }
+    else
+    {
+      RB_FOREACH(mme_p, s1ap_mme_map, &instance_p->s1ap_mme_head)
+      {
+        if( mme_p->assoc_id == assoc_id )
+        {
+          return mme_p;
+        }
       }
     }
-  } else {
-    return RB_FIND(s1ap_mme_map, &instance_p->s1ap_mme_head, &temp);
   }
 
   return NULL;

openair3/S1AP/s1ap_eNB_nas_procedures.c

@@ -339,10 +339,18 @@ int s1ap_eNB_handle_nas_downlink(uint32_t         assoc_id,
     container = &pdu->choice.initiatingMessage.value.choice.DownlinkNASTransport;
     S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_DownlinkNASTransport_IEs_t, ie, container,
                                S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID, true);
+    if(ie == NULL)
+    {
+      return -1;
+    }
     mme_ue_s1ap_id = ie->value.choice.MME_UE_S1AP_ID;
 
     S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_DownlinkNASTransport_IEs_t, ie, container,
                                S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID, true);
+    if(ie == NULL)
+    {
+      return -1;
+    }
     enb_ue_s1ap_id = ie->value.choice.ENB_UE_S1AP_ID;
 
     if ((ue_desc_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance,
@@ -397,6 +405,10 @@ int s1ap_eNB_handle_nas_downlink(uint32_t         assoc_id,
 
     S1AP_FIND_PROTOCOLIE_BY_ID(S1AP_DownlinkNASTransport_IEs_t, ie, container,
                                S1AP_ProtocolIE_ID_id_NAS_PDU, true);
+    if(ie == NULL)
+    {
+      return -1;
+    }
     /* Forward the NAS PDU to RRC */
     s1ap_eNB_itti_send_nas_downlink_ind(s1ap_eNB_instance->instance,
                                         ue_desc_p->ue_initial_id,

openair3/S1AP/s1ap_eNB_overload.c

@@ -62,6 +62,10 @@ int s1ap_eNB_handle_overload_start(uint32_t         assoc_id,
                  S1AP_OverloadResponse_PR_overloadAction,
                  S1AP_OverloadResponse_PR_overloadAction, 0, 0);
     }
+    else
+    {
+        return -1;
+    }
     /* Non UE-associated signalling -> stream 0 */
 
     if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {

openair3/S1AP/s1ap_eNB_timer.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <signal.h>
+#include <time.h>
+#include <errno.h>
+
+#include "assertions.h"
+#include "intertask_interface.h"
+#include "s1ap_eNB_timer.h"
+#include "common/utils/LOG/log.h"
+#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=%x\n", timer_kind);
+  }
+  if (timer_p == NULL)
+  {
+    S1AP_ERROR("Didn't find timer 0x%lx 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 = &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( timer_p->type == 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,
+  uint32_t      interval_us,
+  task_id_t     task_id,
+  int32_t       instance,
+  uint32_t      timer_kind,
+  timer_type_t  type,
+  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( type >= 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( type == 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;
+}
+
+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_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 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;
+}

openair3/S1AP/s1ap_eNB_timer.h

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef TIMER_H_
+#define TIMER_H_
+
+#include <signal.h>
+
+#define SIGTIMER SIGRTMIN
+
+typedef enum s1ap_timer_type_s {
+  S1AP_TIMER_PERIODIC,
+  S1AP_TIMER_ONE_SHOT,
+  S1AP_TIMER_TYPE_MAX,
+} s1ap_timer_type_t;
+
+typedef struct {
+  void    *arg;
+  long    timer_id;
+  int32_t timer_kind;
+} s1ap_timer_has_expired_t;
+
+
+int s1ap_timer_timeout(sigval_t info);
+
+/** \brief Request a new timer
+ *  \param interval_sec timer interval in seconds
+ *  \param interval_us  timer interval in micro seconds
+ *  \param task_id      task id of the task requesting the timer
+ *  \param instance     instance of the task requesting the timer
+ *  \param type         timer type
+ *  \param timer_id     unique timer identifier
+ *  @returns -1 on failure, 0 otherwise
+ **/
+int s1ap_timer_setup(
+  uint32_t      interval_sec,
+  uint32_t      interval_us,
+  task_id_t     task_id,
+  int32_t       instance,
+  uint32_t      timer_kind,
+  timer_type_t  type,
+  void         *timer_arg,
+  long         *timer_id);
+
+/** \brief Remove the timer from list
+ *  \param timer_id unique timer id
+ *  @returns -1 on failure, 0 otherwise
+ **/
+
+int s1ap_timer_remove(long timer_id);
+
+/** \brief Initialize timer task and its API
+ *  \param mme_config MME common configuration
+ *  @returns -1 on failure, 0 otherwise
+ **/
+int s1ap_timer_init(void);
+
+#define S1AP_MMEIND     0x80000000
+#define S1AP_UEIND      0x00000000
+#define S1_SETRSP_WAIT  0x00010000
+#define S1_SETREQ_WAIT  0x00020000
+#define SCTP_REQ_WAIT   0x00030000
+#define S1AP_LINEIND    0x0000ffff
+#define S1AP_TIMERIND   0x00ff0000
+
+#define S1AP_TIMERID_INIT   0xffffffffffffffff
+
+#endif

openair3/S1AP/s1ap_eNB_trace.c

@@ -121,6 +121,10 @@ int s1ap_eNB_handle_trace_start(uint32_t         assoc_id,
   if (ie != NULL) {
     ue_desc_p = s1ap_eNB_get_ue_context(mme_ref_p->s1ap_eNB_instance,
                                         ie->value.choice.ENB_UE_S1AP_ID);
+  }
+  else
+  {
+    return -1;
   }
     if (ue_desc_p == NULL) {
         /* Could not find context associated with this eNB_ue_s1ap_id -> generate

openair3/SCTP/sctp_default_values.h

@@ -24,8 +24,8 @@
 
 #define SCTP_OUT_STREAMS        (16)
 #define SCTP_IN_STREAMS         (16)
-#define SCTP_MAX_ATTEMPTS       (2)
-#define SCTP_TIMEOUT            (5)
+#define SCTP_MAX_ATTEMPTS       (8)
+#define SCTP_TIMEOUT            (60000)
 #define SCTP_RECV_BUFFER_SIZE   (8192)
 
 #endif /* SCTP_DEFAULT_VALUES_H_ */

openair3/SCTP/sctp_eNB_task.c

@@ -943,10 +943,12 @@ sctp_eNB_read_from_socket(
                      &sinfo, &flags);
 
     if (n < 0) {
-        if (errno == ENOTCONN) {
+        if( (errno == ENOTCONN) || (errno == ECONNRESET) || (errno == ETIMEDOUT) || (errno == ECONNREFUSED) )
+        {
             itti_unsubscribe_event_fd(TASK_SCTP, sctp_cnx->sd);
 
             SCTP_DEBUG("Received not connected for sd %d\n", sctp_cnx->sd);
+            SCTP_ERROR("sctp_recvmsg (fd %d, len %d ): %s:%d\n", sctp_cnx->sd, n, strerror(errno), errno);
 
             sctp_itti_send_association_resp(
                 sctp_cnx->task_id, sctp_cnx->instance, -1,