add forwarding and end marker

common/utils/itti_analyzer/filters.xml

@@ -91,6 +91,8 @@
     <TASK_MAC_ENB enabled="1"/>
     <TASK_RLC_ENB enabled="1"/>
     <TASK_PDCP_ENB enabled="1"/>
+    <TASK_DATA_FORWARDING enabled="1"/>
+    <TASK_END_MARKER enabled="1"/>
     <TASK_RRC_ENB enabled="1"/>
     <TASK_RAL_ENB enabled="1"/>
     <TASK_S1AP enabled="1"/>
@@ -114,6 +116,8 @@
     <TASK_MAC_ENB enabled="1"/>
     <TASK_RLC_ENB enabled="1"/>
     <TASK_PDCP_ENB enabled="1"/>
+    <TASK_DATA_FORWARDING enabled="1"/>
+    <TASK_END_MARKER enabled="1"/>
     <TASK_RRC_ENB enabled="1"/>
     <TASK_RAL_ENB enabled="1"/>
     <TASK_S1AP enabled="1"/>

common/utils/itti_analyzer/filters_ue_enb.xml

@@ -130,6 +130,8 @@
     <TASK_MAC_ENB enabled="1"/>
     <TASK_RLC_ENB enabled="1"/>
     <TASK_PDCP_ENB enabled="1"/>
+    <TASK_DATA_FORWARDING enabled="1"/>
+    <TASK_END_MARKER enabled="1"/>
     <TASK_RRC_ENB enabled="1"/>
     <TASK_RAL_ENB enabled="1"/>
     <TASK_S1AP enabled="1"/>
@@ -153,6 +155,8 @@
     <TASK_MAC_ENB enabled="1"/>
     <TASK_RLC_ENB enabled="1"/>
     <TASK_PDCP_ENB enabled="1"/>
+    <TASK_DATA_FORWARDING enabled="1"/>
+    <TASK_END_MARKER enabled="1"/>
     <TASK_RRC_ENB enabled="1"/>
     <TASK_RAL_ENB enabled="1"/>
     <TASK_S1AP enabled="1"/>

common/utils/ocp_itti/intertask_interface.h

@@ -283,6 +283,8 @@ typedef struct {
   TASK_DEF(TASK_RLC_ENB,  TASK_PRIORITY_MED, 200, NULL, NULL)   \
   TASK_DEF(TASK_RRC_ENB_NB_IoT,  TASK_PRIORITY_MED, 200, NULL, NULL) \
   TASK_DEF(TASK_PDCP_ENB, TASK_PRIORITY_MED, 200, NULL, NULL)   \
+  TASK_DEF(TASK_DATA_FORWARDING, TASK_PRIORITY_MED, 200, NULL, NULL)   \
+  TASK_DEF(TASK_END_MARKER, TASK_PRIORITY_MED, 200, NULL, NULL)   \
   TASK_DEF(TASK_RRC_ENB,  TASK_PRIORITY_MED,  200, NULL,NULL)\
   TASK_DEF(TASK_RAL_ENB,  TASK_PRIORITY_MED,  200, NULL, NULL)  \
   TASK_DEF(TASK_S1AP,     TASK_PRIORITY_MED,  200, NULL, NULL)  \

openair2/COMMON/gtpv1_u_messages_def.h

@@ -25,4 +25,8 @@ MESSAGE_DEF(GTPV1U_ENB_DELETE_TUNNEL_REQ,   MESSAGE_PRIORITY_MED, gtpv1u_enb_del
 MESSAGE_DEF(GTPV1U_ENB_DELETE_TUNNEL_RESP,  MESSAGE_PRIORITY_MED, gtpv1u_enb_delete_tunnel_resp_t, Gtpv1uDeleteTunnelResp)
 MESSAGE_DEF(GTPV1U_ENB_TUNNEL_DATA_IND,     MESSAGE_PRIORITY_MED, gtpv1u_enb_tunnel_data_ind_t,    Gtpv1uTunnelDataInd)
 MESSAGE_DEF(GTPV1U_ENB_TUNNEL_DATA_REQ,     MESSAGE_PRIORITY_MED, gtpv1u_enb_tunnel_data_req_t,    Gtpv1uTunnelDataReq)
+MESSAGE_DEF(GTPV1U_ENB_DATA_FORWARDING_REQ, MESSAGE_PRIORITY_MED, gtpv1u_enb_data_forwarding_req_t,Gtpv1uDataForwardingReq)
+MESSAGE_DEF(GTPV1U_ENB_DATA_FORWARDING_IND, MESSAGE_PRIORITY_MED, gtpv1u_enb_data_forwarding_ind_t,Gtpv1uDataForwardingInd)
+MESSAGE_DEF(GTPV1U_ENB_END_MARKER_REQ,      MESSAGE_PRIORITY_MED, gtpv1u_enb_end_marker_req_t,    Gtpv1uEndMarkerReq)
+MESSAGE_DEF(GTPV1U_ENB_END_MARKER_IND,      MESSAGE_PRIORITY_MED, gtpv1u_enb_end_marker_ind_t,    Gtpv1uEndMarkerInd)
 MESSAGE_DEF(GTPV1U_ENB_S1_REQ,        MESSAGE_PRIORITY_MED, Gtpv1uS1Req,    gtpv1uS1Req)

openair2/COMMON/gtpv1_u_messages_types.h

@@ -33,10 +33,33 @@
 #define GTPV1U_ENB_DELETE_TUNNEL_RESP(mSGpTR) (mSGpTR)->ittiMsg.Gtpv1uDeleteTunnelResp
 #define GTPV1U_ENB_TUNNEL_DATA_IND(mSGpTR)    (mSGpTR)->ittiMsg.Gtpv1uTunnelDataInd
 #define GTPV1U_ENB_TUNNEL_DATA_REQ(mSGpTR)    (mSGpTR)->ittiMsg.Gtpv1uTunnelDataReq
+#define GTPV1U_ENB_DATA_FORWARDING_REQ(mSGpTR)    (mSGpTR)->ittiMsg.Gtpv1uDataForwardingReq
+#define GTPV1U_ENB_DATA_FORWARDING_IND(mSGpTR)    (mSGpTR)->ittiMsg.Gtpv1uDataForwardingInd
+#define GTPV1U_ENB_END_MARKER_REQ(mSGpTR)     (mSGpTR)->ittiMsg.Gtpv1uEndMarkerReq
+#define GTPV1U_ENB_END_MARKER_IND(mSGpTR)     (mSGpTR)->ittiMsg.Gtpv1uEndMarkerInd
+
 #define GTPV1U_ENB_S1_REQ(mSGpTR)    (mSGpTR)->ittiMsg.gtpv1uS1Req
 
 #define GTPV1U_ALL_TUNNELS_TEID (teid_t)0xFFFFFFFF
 
+typedef struct gtpv1u_enb_create_x2u_tunnel_req_s {
+  rnti_t                 rnti;
+  int                    num_tunnels;
+  teid_t                 tenb_X2u_teid[GTPV1U_MAX_BEARERS_PER_UE];  ///< Tunnel Endpoint Identifier
+  ebi_t                  eps_bearer_id[GTPV1U_MAX_BEARERS_PER_UE];
+  transport_layer_addr_t enb_addr[GTPV1U_MAX_BEARERS_PER_UE];
+} gtpv1u_enb_create_x2u_tunnel_req_t;
+
+typedef struct gtpv1u_enb_create_x2u_tunnel_resp_s {
+  uint8_t                status;               ///< Status of S1U endpoint creation (Failed = 0xFF or Success = 0x0)
+  rnti_t                 rnti;
+  int                    num_tunnels;
+  teid_t                 enb_X2u_teid[GTPV1U_MAX_BEARERS_PER_UE];  ///< Tunnel Endpoint Identifier
+  ebi_t                  eps_bearer_id[GTPV1U_MAX_BEARERS_PER_UE];
+  transport_layer_addr_t enb_addr;
+} gtpv1u_enb_create_x2u_tunnel_resp_t;
+
+
 typedef struct gtpv1u_enb_create_tunnel_req_s {
   rnti_t                 rnti;
   int                    num_tunnels;
@@ -99,6 +122,50 @@ typedef struct gtpv1u_enb_tunnel_data_req_s {
   rb_id_t                rab_id;
 } gtpv1u_enb_tunnel_data_req_t;
 
+typedef struct gtpv1u_enb_data_forwarding_req_s {
+  uint8_t               *buffer;
+  uint32_t               length;
+  uint32_t               offset;               ///< start of message offset in buffer
+  rnti_t                 rnti;
+  rb_id_t                rab_id;
+} gtpv1u_enb_data_forwarding_req_t;
+
+typedef struct gtpv1u_enb_data_forwarding_ind_s {
+  uint32_t 				 frame;
+  uint8_t 				 enb_flag;
+  uint32_t 				 rb_id;
+  uint32_t 				 muip;
+  uint32_t 				 confirmp;
+  uint32_t 				 sdu_size;
+  uint8_t 				 *sdu_p;
+  uint8_t 				 mode;
+  uint16_t     			 rnti;
+  uint8_t      			 module_id;
+  uint8_t 				 eNB_index;
+} gtpv1u_enb_data_forwarding_ind_t;
+
+typedef struct gtpv1u_enb_end_marker_req_s {
+	  uint8_t               *buffer;
+	  uint32_t               length;
+	  uint32_t               offset;               ///< start of message offset in buffer
+	  rnti_t                 rnti;
+	  rb_id_t                rab_id;
+} gtpv1u_enb_end_marker_req_t;
+
+typedef struct gtpv1u_enb_end_marker_ind_s {
+  uint32_t 			 frame;
+  uint8_t 			 enb_flag;
+  uint32_t 			 rb_id;
+  uint32_t 			 muip;
+  uint32_t 			 confirmp;
+  uint32_t 			 sdu_size;
+  uint8_t 			 *sdu_p;
+  uint8_t 			 mode;
+  uint16_t     			 rnti;
+  uint8_t      			 module_id;
+  uint8_t 			 eNB_index;
+} gtpv1u_enb_end_marker_ind_t;
+
 typedef struct {
   in_addr_t             enb_ip_address_for_S1u_S12_S4_up;
   tcp_udp_port_t        enb_port_for_S1u_S12_S4_up;

openair2/RRC/LTE/rrc_defs.h

@@ -348,11 +348,24 @@ typedef enum HO_STATE_e {
   HO_COMPLETE, // initiated by the target eNB
   HO_REQUEST,
   HO_ACK,
+  HO_FORWARDING,
   HO_CONFIGURED,
+  HO_END_MARKER,
+  HO_FORWARDING_COMPLETE,
   HO_RELEASE,
   HO_CANCEL
 } HO_STATE_t;
 
+typedef enum DATA_FORWARDING_STATE_e {
+  FORWARDING_EMPTY=0,
+  FORWARDING_NO_EMPTY
+} DATA_FORWARDING_STATE_t;
+
+typedef enum DATA_ENDMARK_STATE_e {
+  ENDMARK_EMPTY=0,
+  ENDMARK_NO_EMPTY
+} DATA_ENDMARK_STATE_t;
+
 typedef enum SL_TRIGGER_e {
   SL_RECEIVE_COMMUNICATION=0,
   SL_TRANSMIT_RELAY_ONE_TO_ONE,
@@ -477,6 +490,9 @@ typedef struct HANDOVER_INFO_s {
   uint8_t buf[RRC_BUF_SIZE];  /* ASN.1 encoded handoverCommandMessage */
   int size;   /* size of above message in bytes */
   int x2_id;   /* X2AP UE ID in the target eNB */
+  uint32_t x2u_teid;
+  DATA_FORWARDING_STATE_t forwarding_state;
+  DATA_ENDMARK_STATE_t endmark_state;
 } HANDOVER_INFO;
 
 typedef struct PER_EVENT_s {
@@ -693,6 +709,12 @@ typedef struct eNB_RRC_UE_s {
   uint32_t                           enb_gtp_teid[S1AP_MAX_E_RAB];
   transport_layer_addr_t             enb_gtp_addrs[S1AP_MAX_E_RAB];
   rb_id_t                            enb_gtp_ebi[S1AP_MAX_E_RAB];
+  /* Total number of e_rab already setup in the list */
+  uint8_t                            nb_x2u_e_rabs;
+  // LG: For GTPV1 TUNNELS(X2U)
+  uint32_t                           enb_gtp_x2u_teid[S1AP_MAX_E_RAB];
+  transport_layer_addr_t             enb_gtp_x2u_addrs[S1AP_MAX_E_RAB];
+  rb_id_t                            enb_gtp_x2u_ebi[S1AP_MAX_E_RAB];
   uint32_t                           ul_failure_timer;
   uint32_t                           ue_release_timer;
   uint32_t                           ue_release_timer_thres;

openair2/RRC/LTE/rrc_eNB_GTPV1U.c

@@ -27,14 +27,19 @@
  * \email: lionel.gauthier@eurecom.fr
  */
 
+//#if defined(ENABLE_USE_MME)
 # include "rrc_defs.h"
 # include "rrc_extern.h"
 # include "RRC/LTE/MESSAGES/asn1_msg.h"
 # include "rrc_eNB_GTPV1U.h"
 # include "rrc_eNB_UE_context.h"
 # include "msc.h"
+
+//# if defined(ENABLE_ITTI)
 #   include "asn1_conversions.h"
 #   include "intertask_interface.h"
+//#endif
+
 # include "common/ran_context.h"
 
 extern RAN_CONTEXT_t RC;
@@ -88,6 +93,88 @@ rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP(
   }
 }
 
+//------------------------------------------------------------------------------
+boolean_t
+gtpv_data_req(
+  const protocol_ctxt_t*   const ctxt_pP,
+  const rb_id_t                  rb_idP,
+  const mui_t                    muiP,
+  const confirm_t                confirmP,
+  const sdu_size_t               sdu_sizeP,
+  uint8_t*                 const buffer_pP,
+  const pdcp_transmission_mode_t modeP,
+  uint32_t task_id
+)
+//------------------------------------------------------------------------------
+{
+  if(sdu_sizeP == 0)
+  {
+    LOG_I(GTPU,"gtpv_data_req sdu_sizeP == 0");
+    return FALSE;
+  }
+  LOG_D(GTPU,"gtpv_data_req ue rnti %x sdu_sizeP %d rb id %d", ctxt_pP->rnti, sdu_sizeP, rb_idP);
+#if defined(ENABLE_ITTI)
+  {
+    MessageDef *message_p;
+    // Uses a new buffer to avoid issue with PDCP buffer content that could be changed by PDCP (asynchronous message handling).
+    uint8_t *message_buffer;
+
+    if(task_id == TASK_DATA_FORWARDING){
+
+      LOG_I(GTPU,"gtpv_data_req task_id = TASK_DATA_FORWARDING\n");
+
+      message_buffer = itti_malloc (TASK_GTPV1_U, TASK_DATA_FORWARDING, sdu_sizeP);
+
+      memcpy (message_buffer, buffer_pP, sdu_sizeP);
+
+      message_p = itti_alloc_new_message (TASK_GTPV1_U, GTPV1U_ENB_DATA_FORWARDING_IND);
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).frame 	= ctxt_pP->frame;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).enb_flag	= ctxt_pP->enb_flag;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).rb_id 	= rb_idP;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).muip		= muiP;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).confirmp	= confirmP;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).sdu_size	= sdu_sizeP;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).sdu_p 	= message_buffer;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).mode		= modeP;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).module_id = ctxt_pP->module_id;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).rnti		 = ctxt_pP->rnti;
+      GTPV1U_ENB_DATA_FORWARDING_IND (message_p).eNB_index = ctxt_pP->eNB_index;
+
+      itti_send_msg_to_task (TASK_DATA_FORWARDING, ctxt_pP->instance, message_p);
+      return TRUE; // TODO should be changed to a CNF message later, currently RRC lite does not used the returned value anyway.
+    }else if(task_id == TASK_END_MARKER){
+      
+      LOG_I(GTPU,"gtpv_data_req task_id = TASK_END_MARKER\n");
+
+      message_buffer = itti_malloc (TASK_GTPV1_U, TASK_END_MARKER, sdu_sizeP);
+
+      memcpy (message_buffer, buffer_pP, sdu_sizeP);
+
+      message_p = itti_alloc_new_message (TASK_GTPV1_U, GTPV1U_ENB_END_MARKER_IND);
+      GTPV1U_ENB_END_MARKER_IND (message_p).frame 	= ctxt_pP->frame;
+      GTPV1U_ENB_END_MARKER_IND (message_p).enb_flag	= ctxt_pP->enb_flag;
+      GTPV1U_ENB_END_MARKER_IND (message_p).rb_id 	= rb_idP;
+      GTPV1U_ENB_END_MARKER_IND (message_p).muip		= muiP;
+      GTPV1U_ENB_END_MARKER_IND (message_p).confirmp	= confirmP;
+      GTPV1U_ENB_END_MARKER_IND (message_p).sdu_size	= sdu_sizeP;
+      GTPV1U_ENB_END_MARKER_IND (message_p).sdu_p 	= message_buffer;
+      GTPV1U_ENB_END_MARKER_IND (message_p).mode		= modeP;
+      GTPV1U_ENB_END_MARKER_IND (message_p).module_id = ctxt_pP->module_id;
+      GTPV1U_ENB_END_MARKER_IND (message_p).rnti		 = ctxt_pP->rnti;
+      GTPV1U_ENB_END_MARKER_IND (message_p).eNB_index = ctxt_pP->eNB_index;
+
+      itti_send_msg_to_task (TASK_END_MARKER, ctxt_pP->instance, message_p);
+      return TRUE; // TODO should be changed to a CNF message later, currently RRC lite does not used the returned value anyway.
+    }
+  }
+#endif
+
+  return TRUE;
+
+}
+
+//#endif
+
 void rrc_eNB_send_GTPV1U_ENB_DELETE_TUNNEL_REQ(
   module_id_t enb_mod_idP,
   const rrc_eNB_ue_context_t* const ue_context_pP
@@ -112,3 +199,5 @@ void rrc_eNB_send_GTPV1U_ENB_DELETE_TUNNEL_REQ(
   }
   itti_send_msg_to_task(TASK_GTPV1_U, ENB_MODULE_ID_TO_INSTANCE(enb_mod_idP), msg);
 }
+
+

openair2/RRC/LTE/rrc_eNB_GTPV1U.h

@@ -53,4 +53,16 @@ void rrc_eNB_send_GTPV1U_ENB_DELETE_TUNNEL_REQ(
   const rrc_eNB_ue_context_t* const ue_context_pP
 );
 
+boolean_t
+gtpv_data_req(
+  const protocol_ctxt_t*   const ctxt_pP,
+  const rb_id_t                  rb_idP,
+  const mui_t                    muiP,
+  const confirm_t                confirmP,
+  const sdu_size_t               sdu_sizeP,
+  uint8_t*                 const buffer_pP,
+  const pdcp_transmission_mode_t modeP,
+  uint32_t task_id
+);
+
 #endif /* RRC_ENB_GTPV1U_H_ */

openair2/RRC/LTE/rrc_eNB_S1AP.c

@@ -2040,6 +2040,70 @@ int rrc_eNB_send_PATH_SWITCH_REQ(const protocol_ctxt_t *const ctxt_pP,
   return 0;
 }
 
+int rrc_eNB_process_X2AP_TUNNEL_SETUP_REQ(instance_t instance, rrc_eNB_ue_context_t* const ue_context_target_p) {
+  gtpv1u_enb_create_x2u_tunnel_req_t  create_tunnel_req;
+  gtpv1u_enb_create_x2u_tunnel_resp_t create_tunnel_resp;
+  uint8_t                      		  e_rab_done;
+  uint8_t                         	  inde_list[NB_RB_MAX - 3]= {0};
+  
+  LOG_I(RRC, "[eNB %d] rrc_eNB_process_X2AP_TUNNEL_SETUP_REQ: rnti %u nb_of_e_rabs %d\n",
+        instance, ue_context_target_p->ue_context.rnti, ue_context_target_p->ue_context.nb_of_e_rabs);
+
+  if (ue_context_target_p == NULL) {
+    
+    return (-1);
+  } else {
+    
+    /* Save e RAB information for later */
+    {
+      int i;
+      memset(&create_tunnel_req, 0, sizeof(create_tunnel_req));
+      uint8_t nb_e_rabs_tosetup = ue_context_target_p->ue_context.nb_of_e_rabs;
+      e_rab_done = 0;
+
+      for (i = 0;i < nb_e_rabs_tosetup; i++) {
+
+        if(ue_context_target_p->ue_context.e_rab[i].status >= E_RAB_STATUS_DONE)
+          continue;
+
+        create_tunnel_req.eps_bearer_id[e_rab_done]       = ue_context_target_p->ue_context.e_rab[i].param.e_rab_id;
+        LOG_I(RRC,"x2 tunnel setup: local index %d UE id %x, eps id %d \n",
+              i,
+              ue_context_target_p->ue_context.rnti,
+              create_tunnel_req.eps_bearer_id[i] );
+		inde_list[i] = e_rab_done;
+        e_rab_done++;
+      }
+
+      create_tunnel_req.rnti           = ue_context_target_p->ue_context.rnti; // warning put zero above
+      create_tunnel_req.num_tunnels    = e_rab_done;
+      // NN: not sure if we should create a new tunnel: need to check teid, etc.
+      gtpv1u_create_x2u_tunnel(
+        instance,
+        &create_tunnel_req,
+        &create_tunnel_resp);
+
+          ue_context_target_p->ue_context.nb_x2u_e_rabs = create_tunnel_resp.num_tunnels;
+	  for (i = 0; i < create_tunnel_resp.num_tunnels; i++) {
+		ue_context_target_p->ue_context.enb_gtp_x2u_teid[inde_list[i]]  = create_tunnel_resp.enb_X2u_teid[i];
+	    ue_context_target_p->ue_context.enb_gtp_x2u_addrs[inde_list[i]] = create_tunnel_resp.enb_addr;
+		ue_context_target_p->ue_context.enb_gtp_x2u_ebi[inde_list[i]]   = create_tunnel_resp.eps_bearer_id[i];
+
+		LOG_I(RRC, "rrc_eNB_process_X2AP_TUNNEL_SETUP_REQ tunnel (%u, %u) bearer UE context index %u, msg index %u, eps bearer id %u, gtp addr len %d \n",
+            create_tunnel_resp.enb_X2u_teid[i],
+            ue_context_target_p->ue_context.enb_gtp_x2u_teid[inde_list[i]],            
+            inde_list[i],
+	    	i,
+            create_tunnel_resp.eps_bearer_id[i],
+	    	create_tunnel_resp.enb_addr.length);
+	  }
+    }
+
+    return (0);
+  }
+}
+
+
 int rrc_eNB_process_S1AP_PATH_SWITCH_REQ_ACK (MessageDef *msg_p, const char *msg_name, instance_t instance) {
   uint16_t                        ue_initial_id;
   uint32_t                        eNB_ue_s1ap_id;

openair2/RRC/LTE/rrc_eNB_S1AP.h

@@ -278,6 +278,7 @@ int rrc_eNB_send_S1AP_E_RAB_RELEASE_RESPONSE(const protocol_ctxt_t *const ctxt_p
 
 int rrc_eNB_send_PATH_SWITCH_REQ(const protocol_ctxt_t *const ctxt_pP,
                                  rrc_eNB_ue_context_t          *const ue_context_pP);
+int rrc_eNB_process_X2AP_TUNNEL_SETUP_REQ(instance_t instance, rrc_eNB_ue_context_t* const ue_context_target_p);
 int rrc_eNB_process_S1AP_PATH_SWITCH_REQ_ACK (MessageDef *msg_p, const char *msg_name, instance_t instance);
 
 int rrc_eNB_send_X2AP_UE_CONTEXT_RELEASE(const protocol_ctxt_t* const ctxt_pP, rrc_eNB_ue_context_t* const ue_context_pP);

openair2/X2AP/x2ap_eNB_generate_messages.c

@@ -797,6 +797,27 @@ int x2ap_eNB_generate_x2_handover_request_ack (x2ap_eNB_instance_t *instance_p,
         e_RABs_Admitted_Item = &e_RABS_Admitted_ItemIEs->value.choice.E_RABs_Admitted_Item;
         {
           e_RABs_Admitted_Item->e_RAB_ID = x2ap_handover_req_ack->e_rabs_tobesetup[i].e_rab_id;
+	  e_RABs_Admitted_Item->uL_GTP_TunnelEndpoint = NULL;
+	  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint = (X2AP_GTPtunnelEndpoint_t *)calloc(1, sizeof(*e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint));
+		  
+	  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.size = (uint8_t)x2ap_handover_req_ack->e_rabs_tobesetup[i].eNB_addr.length;
+          e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.bits_unused = 0;
+          e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.buf =
+                        calloc(1, e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.size);
+
+          memcpy (e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.buf,
+                  x2ap_handover_req_ack->e_rabs_tobesetup[i].eNB_addr.buffer,
+                  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.size);
+
+          X2AP_DEBUG("X2 handover response target ip addr. length %lu bits_unused %d buf %d.%d.%d.%d\n",
+		  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.size,
+		  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.bits_unused,
+		  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.buf[0],
+		  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.buf[1],
+		  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.buf[2],
+		  e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.buf[3]);
+		  
+          INT32_TO_OCTET_STRING(x2ap_handover_req_ack->e_rabs_tobesetup[i].gtp_teid, &e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->gTP_TEID);
         }
         ASN_SEQUENCE_ADD(&ie->value.choice.E_RABs_Admitted_List.list, e_RABS_Admitted_ItemIEs);
       }

openair2/X2AP/x2ap_eNB_handler.c

@@ -749,6 +749,8 @@ int x2ap_eNB_handle_handover_response (instance_t instance,
 {
   X2AP_HandoverRequestAcknowledge_t             *x2HandoverRequestAck;
   X2AP_HandoverRequestAcknowledge_IEs_t         *ie;
+  X2AP_E_RABs_Admitted_ItemIEs_t		 		*e_RABS_Admitted_ItemIEs;
+  X2AP_E_RABs_Admitted_Item_t 		   			*e_RABs_Admitted_Item;
 
   x2ap_eNB_instance_t                           *instance_p;
   x2ap_eNB_data_t                               *x2ap_eNB_data;
@@ -816,6 +818,56 @@ int x2ap_eNB_handle_handover_response (instance_t instance,
 
   X2AP_HANDOVER_REQ_ACK(msg).rnti = rnti;
 
+
+  X2AP_FIND_PROTOCOLIE_BY_ID(X2AP_HandoverRequestAcknowledge_IEs_t, ie, x2HandoverRequestAck,
+                             X2AP_ProtocolIE_ID_id_E_RABs_Admitted_List, true);
+
+  if (ie == NULL ) {
+    X2AP_ERROR("%s %d: ie is a NULL pointer \n", __FILE__, __LINE__);
+    return -1;
+  }else{
+    if (ie->value.choice.E_RABs_Admitted_List.list.count > 0) {
+  
+      uint8_t nb_e_rabs_tobesetup;
+      nb_e_rabs_tobesetup = ie->value.choice.E_RABs_Admitted_List.list.count;
+      X2AP_HANDOVER_REQ_ACK(msg).nb_e_rabs_tobesetup = nb_e_rabs_tobesetup;
+  
+      for (int i=0; i<nb_e_rabs_tobesetup; i++) {
+        e_RABS_Admitted_ItemIEs = (X2AP_E_RABs_Admitted_ItemIEs_t *) ie->value.choice.E_RABs_Admitted_List.list.array[i];
+	e_RABs_Admitted_Item = &e_RABS_Admitted_ItemIEs->value.choice.E_RABs_Admitted_Item;
+  
+	X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].e_rab_id = e_RABs_Admitted_Item->e_RAB_ID ;
+	X2AP_ERROR("x2u tunnel: index %d e_rab_id %d\n", i, X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].e_rab_id);
+		  
+	if(e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint == NULL){
+	  X2AP_DEBUG("%s %d: X2AP_E_RABs_Admitted_Item_t->dL_GTP_TunnelEndpoint is a NULL pointer \n", __FILE__, __LINE__);
+	  continue;
+	}
+		  
+         memcpy(X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].eNB_addr.buffer,
+		e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.buf,
+		e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.size);
+  
+	X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].eNB_addr.length = e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->transportLayerAddress.size;
+  
+	OCTET_STRING_TO_INT32(&e_RABs_Admitted_Item->dL_GTP_TunnelEndpoint->gTP_TEID,
+			      X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].gtp_teid);
+  
+  
+        X2AP_DEBUG("x2u tunnel: index %d target enb ip %d.%d.%d.%d length %d gtp teid %u\n", 
+		    i, 
+		    X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].eNB_addr.buffer[0],
+		    X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].eNB_addr.buffer[1],
+		    X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].eNB_addr.buffer[2],
+		    X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].eNB_addr.buffer[3],
+		    X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].eNB_addr.length,
+	            X2AP_HANDOVER_REQ_ACK(msg).e_rabs_tobesetup[i].gtp_teid);
+        }
+	
+      }
+
+    }
+  
   X2AP_FIND_PROTOCOLIE_BY_ID(X2AP_HandoverRequestAcknowledge_IEs_t, ie, x2HandoverRequestAck,
                              X2AP_ProtocolIE_ID_id_TargeteNBtoSource_eNBTransparentContainer, true);
 

openair3/GTPV1-U/gtpv1u_eNB_defs.h

@@ -40,6 +40,11 @@
 
 #define GTPV1U_MAX_BEARERS_ID     (max_val_LTE_DRB_Identity - GTPV1U_BEARER_OFFSET)
 
+#define GTPV1U_SOURCE_ENB (0)
+#define GTPV1U_TARGET_ENB (1)
+#define GTPV1U_MSG_FROM_SOURCE_ENB (0)
+#define GTPV1U_MSG_FROM_SPGW (1)
+
 typedef enum {
   BEARER_DOWN = 0,
   BEARER_IN_CONFIG,
@@ -65,6 +70,9 @@ typedef struct gtpv1u_bearer_s {
   teid_t          teid_sgw;                ///< Remote TEID
   in_addr_t       sgw_ip_addr;
   struct in6_addr sgw_ip6_addr;
+  teid_t          teid_teNB;
+  in_addr_t       tenb_ip_addr;				///< target eNB ipv4
+  struct in6_addr tenb_ip6_addr;				///< target eNB ipv6
   tcp_udp_port_t  port;
   //NwGtpv1uStackSessionHandleT stack_session;
   bearer_state_t state;

openair3/GTPV1-U/gtpv1u_eNB_task.h

@@ -44,6 +44,12 @@ int   gtpv1u_eNB_init(void);
 void *gtpv1u_eNB_process_itti_msg(void*);
 void *gtpv1u_eNB_task(void *args);
 
+int
+gtpv1u_create_x2u_tunnel(
+  const instance_t instanceP,
+  const gtpv1u_enb_create_x2u_tunnel_req_t *  const create_tunnel_req_pP,
+        gtpv1u_enb_create_x2u_tunnel_resp_t * const create_tunnel_resp_pP);
+
 int
 gtpv1u_create_s1u_tunnel(
   const instance_t instanceP,
@@ -55,4 +61,9 @@ gtpv1u_update_s1u_tunnel(
     const instance_t                              instanceP,
     const gtpv1u_enb_create_tunnel_req_t * const  create_tunnel_req_pP,
     const rnti_t                                  prior_rnti);
+
+int gtpv1u_delete_x2u_tunnel(
+  const instance_t                             instanceP,
+  const gtpv1u_enb_delete_tunnel_req_t * const req_pP,
+  int                             enbflag);
 #endif /* GTPV1U_ENB_TASK_H_ */

openair3/GTPV1-U/nw-gtpv1u/src/NwGtpv1u.c

@@ -893,8 +893,14 @@ nwGtpv1uProcessUdpReq( NW_IN NwGtpv1uStackHandleT hGtpuStackHandle,
     break;
 
   case NW_GTP_END_MARKER:
-    GTPU_DEBUG("NW_GTP_END_MARKER\n");
-    ret = NW_GTPV1U_OK;
+#if defined(LOG_GTPU) && LOG_GTPU > 0
+    for(int i =1; i<= udpDataLen; i++){
+      printf("%02x ", udpData[i-1]);
+      if(i % 20 == 0)printf("\n");
+    }
+#endif  	
+    GTPU_INFO("NW_GTP_END_MARKER\n");
+    ret = nwGtpv1uProcessGpdu(thiz, udpData, udpDataLen, peerIp);
     break;
 
   default:

openair3/S1AP/s1ap_eNB_handlers.c

@@ -1518,7 +1518,7 @@ int s1ap_eNB_handle_s1_path_switch_request_ack(uint32_t               assoc_id,
   if (stream == 0) {
     S1AP_ERROR("[SCTP %d] Received s1 path switch request ack on stream (%d)\n",
                assoc_id, stream);
-    return -1;
+    //return -1;
   }
 
   if ((mme_desc_p = s1ap_eNB_get_MME(NULL, assoc_id, 0)) == NULL) {

openair3/UDP/udp_eNB_task.c

@@ -371,13 +371,13 @@ void *udp_eNB_task(void *args_p)
         udp_sd = udp_sock_p->sd;
         pthread_mutex_unlock(&udp_socket_list_mutex);
 
-#if defined(LOG_UDP) && LOG_UDP > 0
+//#if defined(LOG_UDP) && LOG_UDP > 0
         LOG_D(UDP_, "[%d] Sending message of size %u to "IPV4_ADDR" and port %u\n",
               udp_sd,
               udp_data_req_p->buffer_length,
               IPV4_ADDR_FORMAT(udp_data_req_p->peer_address),
               udp_data_req_p->peer_port);
-#endif
+//#endif
         bytes_written = sendto(
                           udp_sd,
                           &udp_data_req_p->buffer[udp_data_req_p->buffer_offset],