diff --git a/openair-cn/NAS/EURECOM-NAS/src/emm/TrackingAreaUpdate.c b/openair-cn/NAS/EURECOM-NAS/src/emm/TrackingAreaUpdate.c
index 4ff7e485f75f50ed11fc4afe8c842eaed659f678..4c29dcc40ad5a49c5735628f8b73d20d38ffc724 100644
--- a/openair-cn/NAS/EURECOM-NAS/src/emm/TrackingAreaUpdate.c
+++ b/openair-cn/NAS/EURECOM-NAS/src/emm/TrackingAreaUpdate.c
@@ -32,6 +32,9 @@ Description Defines the tracking area update EMM procedure executed by the
#include "emmData.h"
#include "emm_sap.h"
+#include "emm_cause.h"
+
+#include <string.h> // memcmp, memcpy
/****************************************************************************/
/**************** E X T E R N A L D E F I N I T I O N S ****************/
@@ -59,12 +62,58 @@ void *_emm_tau_t3430_handler(void *);
* --------------------------------------------------------------------------
*/
#ifdef NAS_MME
+static int _emm_tracking_area_update_reject(void *args);
#endif // NAS_MME
/****************************************************************************/
/****************** E X P O R T E D F U N C T I O N S ******************/
/****************************************************************************/
+/****************************************************************************
+ ** **
+ ** Name: emm_proc_tracking_area_update_reject() **
+ ** **
+ ** Description: **
+ ** **
+ ** Inputs: ueid: UE lower layer identifier **
+ ** emm_cause: EMM cause code to be reported **
+ ** Others: None **
+ ** **
+ ** Outputs: None **
+ ** Return: RETURNok, RETURNerror **
+ ** Others: _emm_data **
+ ** **
+ ***************************************************************************/
+int emm_proc_tracking_area_update_reject(unsigned int ueid, int emm_cause)
+{
+ LOG_FUNC_IN;
+
+ int rc;
+
+ /* Create temporary UE context */
+ emm_data_context_t ue_ctx;
+ memset(&ue_ctx, 0 , sizeof(emm_data_context_t));
+ ue_ctx.is_dynamic = FALSE;
+ ue_ctx.ueid = ueid;
+
+ /* Update the EMM cause code */
+#if defined(EPC_BUILD)
+ if (ueid > 0)
+#else
+ if (ueid < EMM_DATA_NB_UE_MAX)
+#endif
+ {
+ ue_ctx.emm_cause = emm_cause;
+ } else {
+ ue_ctx.emm_cause = EMM_CAUSE_ILLEGAL_UE;
+ }
+
+ /* Do not accept attach request with protocol error */
+ rc = _emm_tracking_area_update_reject(&ue_ctx);
+
+ LOG_FUNC_RETURN(rc);
+}
+
/****************************************************************************/
/********************* L O C A L F U N C T I O N S *********************/
/****************************************************************************/
@@ -78,18 +127,18 @@ void *_emm_tau_t3430_handler(void *);
/****************************************************************************
** **
- ** Name: _emm_tau_t3430_handler() **
+ ** Name: _emm_tau_t3430_handler() **
** **
** Description: T3430 timeout handler **
** **
** 3GPP TS 24.301, section 5.5.3.2.6 case c **
** **
- ** Inputs: args: handler parameters **
- ** Others: None **
+ ** Inputs: args: handler parameters **
+ ** Others: None **
** **
** Outputs: None **
- ** Return: None **
- ** Others: None **
+ ** Return: None **
+ ** Others: None **
** **
***************************************************************************/
void *_emm_tau_t3430_handler(void *args)
@@ -105,3 +154,58 @@ void *_emm_tau_t3430_handler(void *args)
}
#endif // NAS_UE
+
+#ifdef NAS_MME
+/****************************************************************************
+ ** **
+ ** Name: _emm_tracking_area_update_reject() **
+ ** **
+ ** Description: Performs the tracking area update procedure not accepted **
+ ** by the network. **
+ ** **
+ ** Inputs: args: UE context data **
+ ** Others: None **
+ ** **
+ ** Outputs: None **
+ ** Return: RETURNok, RETURNerror **
+ ** Others: None **
+ ** **
+ ***************************************************************************/
+static int _emm_tracking_area_update_reject(void *args)
+{
+ LOG_FUNC_IN;
+
+ int rc = RETURNerror;
+
+ emm_data_context_t *emm_ctx = (emm_data_context_t *)(args);
+
+ if (emm_ctx) {
+ emm_sap_t emm_sap;
+ LOG_TRACE(WARNING, "EMM-PROC - EMM tracking area update procedure not accepted "
+ "by the network (ueid=%08x, cause=%d)",
+ emm_ctx->ueid, emm_ctx->emm_cause);
+ /*
+ * Notify EMM-AS SAP that Tracking Area Update Reject message has to be sent
+ * onto the network
+ */
+ emm_sap.primitive = EMMAS_ESTABLISH_REJ;
+ emm_sap.u.emm_as.u.establish.ueid = emm_ctx->ueid;
+ emm_sap.u.emm_as.u.establish.UEid.guti = NULL;
+ if (emm_ctx->emm_cause == EMM_CAUSE_SUCCESS) {
+ emm_ctx->emm_cause = EMM_CAUSE_ILLEGAL_UE;
+ }
+ emm_sap.u.emm_as.u.establish.emm_cause = emm_ctx->emm_cause;
+ emm_sap.u.emm_as.u.establish.NASinfo = EMM_AS_NAS_INFO_TAU;
+ emm_sap.u.emm_as.u.establish.NASmsg.length = 0;
+ emm_sap.u.emm_as.u.establish.NASmsg.value = NULL;
+
+ /* Setup EPS NAS security data */
+ emm_as_set_security_data(&emm_sap.u.emm_as.u.establish.sctx,
+ emm_ctx->security, FALSE, TRUE);
+ rc = emm_sap_send(&emm_sap);
+ }
+
+ LOG_FUNC_RETURN(rc);
+}
+
+#endif // NAS_MME
diff --git a/openair-cn/NAS/EURECOM-NAS/src/emm/emm_proc.h b/openair-cn/NAS/EURECOM-NAS/src/emm/emm_proc.h
index d194e2728a0c386b700f35c21088866f37f7a694..50e490280eaca9ca8b0a6c8daf3420433b0f631b 100644
--- a/openair-cn/NAS/EURECOM-NAS/src/emm/emm_proc.h
+++ b/openair-cn/NAS/EURECOM-NAS/src/emm/emm_proc.h
@@ -137,6 +137,7 @@ int emm_proc_attach_request(unsigned int ueid, emm_proc_attach_type_t type,
imei_t *imei, tai_t *tai, int eea, int eia, const OctetString *esm_msg);
int emm_proc_attach_reject(unsigned int ueid, int emm_cause);
int emm_proc_attach_complete(unsigned int ueid, const OctetString *esm_msg);
+int emm_proc_tracking_area_update_reject(unsigned int ueid, int emm_cause);
#endif
/*
diff --git a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_as.c b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_as.c
index 29b483c8c7b4abe9984c79516fabcf5d67c7c472..176b9f9940bcc5ec095bcca012434fc5a25476d7 100644
--- a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_as.c
+++ b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_as.c
@@ -368,6 +368,12 @@ static int _emm_as_recv(unsigned int ueid, const char *msg, int len,
break;
#endif
#ifdef NAS_MME
+ case ATTACH_REQUEST:
+ rc = emm_recv_attach_request(ueid,
+ &emm_msg->attach_request,
+ emm_cause);
+ break;
+
case IDENTITY_RESPONSE:
rc = emm_recv_identity_response(ueid,
&emm_msg->identity_response,
@@ -722,7 +728,9 @@ static int _emm_as_establish_req(const emm_as_establish_t *msg, int *emm_cause)
break;
case TRACKING_AREA_UPDATE_REQUEST:
- rc = RETURNok; /* TODO */
+ rc = emm_recv_tracking_area_update_request(msg->ueid,
+ &emm_msg->tracking_area_update_request,
+ emm_cause);
break;
case SERVICE_REQUEST:
@@ -1096,6 +1104,7 @@ static int _emm_as_send(const emm_as_t *msg)
LOG_FUNC_RETURN (RETURNok);
} break;
+ case AS_NAS_ESTABLISH_RSP:
case AS_NAS_ESTABLISH_CNF: {
if (as_msg.msg.nas_establish_rsp.errCode != AS_SUCCESS) {
nas_itti_dl_data_req(as_msg.msg.nas_establish_rsp.UEid,
@@ -1768,6 +1777,10 @@ static int _emm_as_establish_rej(const emm_as_establish_t *msg,
size = emm_send_attach_reject(msg, &emm_msg->attach_reject);
break;
+ case EMM_AS_NAS_INFO_TAU:
+ size = emm_send_tracking_area_update_reject(msg, &emm_msg->tracking_area_update_reject);
+ break;
+
default:
LOG_TRACE(WARNING, "EMMAS-SAP - Type of initial NAS "
"message 0x%.2x is not valid", msg->NASinfo);
diff --git a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.c b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.c
index 993bfa53c97ae6a80665c5d43516d4cfa8bab111..dcd5ad46921b84f7fecb1e5fefdaa6e3912b8940 100644
--- a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.c
+++ b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.c
@@ -745,6 +745,37 @@ int emm_recv_detach_request(unsigned int ueid, const detach_request_msg *msg,
LOG_FUNC_RETURN (rc);
}
+/****************************************************************************
+ ** **
+ ** Name: emm_recv_tracking_area_update_request() **
+ ** **
+ ** Description: Processes Tracking Area Update Request message **
+ ** **
+ ** Inputs: ueid: UE lower layer identifier **
+ ** msg: The received EMM message **
+ ** Others: None **
+ ** **
+ ** Outputs: emm_cause: EMM cause code **
+ ** Return: RETURNok, RETURNerror **
+ ** Others: None **
+ ** **
+ ***************************************************************************/
+int emm_recv_tracking_area_update_request(unsigned int ueid,
+ const tracking_area_update_request_msg *msg,
+ int *emm_cause)
+{
+ int rc = RETURNok;
+
+ LOG_FUNC_IN;
+
+ LOG_TRACE(INFO, "EMMAS-SAP - Received Tracking Area Update Request message");
+
+ /* LW: Not completely implemented; send a Received Tracking Area Update Reject to induce a Attach Request from UE! */
+ rc = emm_proc_tracking_area_update_reject(ueid, EMM_CAUSE_IMPLICITLY_DETACHED);
+
+ LOG_FUNC_RETURN (rc);
+}
+
/****************************************************************************
** **
** Name: emm_recv_identity_response() **
diff --git a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.h b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.h
index 60fa19d72fdd7b341f492bb04661584c869bb181..e9e29f4ec24eba7ea3d6d21323147ac27e345e8e 100644
--- a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.h
+++ b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_recv.h
@@ -116,6 +116,10 @@ int emm_recv_attach_complete(unsigned int ueid, const attach_complete_msg *msg,
int emm_recv_detach_request(unsigned int ueid, const detach_request_msg *msg,
int *emm_cause);
+int emm_recv_tracking_area_update_request(unsigned int ueid,
+ const tracking_area_update_request_msg *msg,
+ int *emm_cause);
+
int emm_recv_identity_response(unsigned int ueid, identity_response_msg *msg,
int *emm_cause);
int emm_recv_authentication_response(unsigned int ueid,
diff --git a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.c b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.c
index b81484eae2987e8f56335b2b7e4615641d5cdf60..6ba7469cf48017554490714ae55ca26286f704de 100644
--- a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.c
+++ b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.c
@@ -990,6 +990,44 @@ int emm_send_attach_reject(const emm_as_establish_t *msg,
LOG_FUNC_RETURN (size);
}
+/****************************************************************************
+ ** **
+ ** Name: emm_send_tracking_area_update_reject() **
+ ** **
+ ** Description: Builds Tracking Area Update Reject message **
+ ** **
+ ** The Tracking Area Update Reject message is sent by the **
+ ** network to the UE to indicate that the corresponding **
+ ** tracking area update has been rejected. **
+ ** **
+ ** Inputs: msg: The EMMAS-SAP primitive to process **
+ ** Others: None **
+ ** **
+ ** Outputs: emm_msg: The EMM message to be sent **
+ ** Return: The size of the EMM message **
+ ** Others: None **
+ ** **
+ ***************************************************************************/
+int emm_send_tracking_area_update_reject(const emm_as_establish_t *msg,
+ tracking_area_update_reject_msg *emm_msg)
+{
+ LOG_FUNC_IN;
+
+ int size = EMM_HEADER_MAXIMUM_LENGTH;
+
+ LOG_TRACE(INFO, "EMMAS-SAP - Send Tracking Area Update Reject message (cause=%d)",
+ msg->emm_cause);
+
+ /* Mandatory - Message type */
+ emm_msg->messagetype = TRACKING_AREA_UPDATE_REJECT;
+
+ /* Mandatory - EMM cause */
+ size += EMM_CAUSE_MAXIMUM_LENGTH;
+ emm_msg->emmcause = msg->emm_cause;
+
+ LOG_FUNC_RETURN (size);
+}
+
/****************************************************************************
** **
** Name: emm_send_identity_request() **
diff --git a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.h b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.h
index 735f167b943032fecf253de83800eab512454456..25040dbf66e111377440d01275e3f948a5ede0a0 100644
--- a/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.h
+++ b/openair-cn/NAS/EURECOM-NAS/src/emm/sap/emm_send.h
@@ -130,6 +130,9 @@ int emm_send_security_mode_reject(const emm_as_security_t *,
int emm_send_attach_accept(const emm_as_establish_t *, attach_accept_msg *);
int emm_send_attach_reject(const emm_as_establish_t *, attach_reject_msg *);
+int emm_send_tracking_area_update_reject(const emm_as_establish_t *msg,
+ tracking_area_update_reject_msg *emm_msg);
+
int emm_send_identity_request(const emm_as_security_t *, identity_request_msg *);
int emm_send_authentication_request(const emm_as_security_t *,
authentication_request_msg *);