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https://github.com/open5gs/open5gs.git
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mme: Delete session when default E-RAB setup fails
When the MME receives an E-RAB Setup Response with failure for the default bearer, the PDN session remains in MME/SGWC context even though it was never activated. As a result, when the UE retries PDN Connectivity Request for the same APN, the MME prints "APN duplicated [ims]" and rejects the request. This patch fixes the issue by sending a Delete Session Request toward SGWC when the default E-RAB setup fails. The failed PDN session is then removed, allowing the UE to reattempt PDN connectivity for the same APN. Added a new regression test (test_issues4141_func) that reproduces the scenario: - First PDN Connectivity Request for IMS fails (E-RAB setup failure) - MME sends Delete Session Request - Second PDN Connectivity Request for IMS succeeds normally Issue: #4141
This commit is contained in:
Sukchan Lee
parent
348d48fd7d
commit
4642ef5a18
4 changed files with 376 additions and 11 deletions
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@ -1646,6 +1646,11 @@ void s1ap_handle_e_rab_setup_response(
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enb_ue_t *enb_ue = NULL;
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mme_ue_t *mme_ue = NULL;
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sgw_ue_t *sgw_ue = NULL;
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mme_sess_t *sess = NULL;
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mme_bearer_t *bearer = NULL;
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mme_bearer_t *linked_bearer = NULL;
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ogs_assert(enb);
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ogs_assert(enb->sctp.sock);
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@ -1740,8 +1745,6 @@ void s1ap_handle_e_rab_setup_response(
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S1AP_E_RABSetupItemBearerSUResIEs_t *item = NULL;
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S1AP_E_RABSetupItemBearerSURes_t *e_rab = NULL;
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mme_bearer_t *bearer = NULL;
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item = (S1AP_E_RABSetupItemBearerSUResIEs_t *)
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E_RABSetupListBearerSURes->list.array[i];
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if (!item) {
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@ -1817,7 +1820,7 @@ void s1ap_handle_e_rab_setup_response(
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bearer->enb_s1u_ip.addr6, OGS_IPV6_LEN);
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if (OGS_FSM_CHECK(&bearer->sm, esm_state_active)) {
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mme_bearer_t *linked_bearer = mme_linked_bearer(bearer);
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linked_bearer = mme_linked_bearer(bearer);
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ogs_assert(linked_bearer);
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ogs_debug(" Linked-EBI[%d]", linked_bearer->ebi);
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@ -1838,13 +1841,16 @@ void s1ap_handle_e_rab_setup_response(
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}
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if (E_RABFailedToSetupListBearerSURes) {
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ogs_debug("E_RABFailedToSetupListBearerSURes");
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ogs_warn("E_RABFailedToSetupListBearerSURes");
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for (i = 0; i < E_RABFailedToSetupListBearerSURes->list.count; i++) {
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S1AP_E_RABItem_t *item = (S1AP_E_RABItem_t *)
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S1AP_E_RABItemIEs_t *item = NULL;
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S1AP_E_RABItem_t *e_rab = NULL;
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item = (S1AP_E_RABItemIEs_t *)
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E_RABFailedToSetupListBearerSURes->list.array[i];
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if (!item) {
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ogs_error("No S1AP_E_RABItem_t");
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ogs_error("No S1AP_E_RABItemIEs_t");
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r = s1ap_send_error_indication2(mme_ue,
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S1AP_Cause_PR_protocol,
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S1AP_CauseProtocol_semantic_error);
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@ -1853,9 +1859,44 @@ void s1ap_handle_e_rab_setup_response(
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return;
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}
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ogs_debug("RAB_ID: %d", (int)item->e_RAB_ID);
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ogs_debug(" Cause[Group:%d Cause:%d]",
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(int)item->cause.present, (int)item->cause.choice.radioNetwork);
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e_rab = &item->value.choice.E_RABItem;
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ogs_warn("RAB_ID: %x", (int)e_rab->e_RAB_ID);
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ogs_warn(" Cause[Group:%d Cause:%d]",
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(int)e_rab->cause.present,
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(int)e_rab->cause.choice.radioNetwork);
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bearer = mme_bearer_find_by_ue_ebi(mme_ue, e_rab->e_RAB_ID);
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if (!bearer) {
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ogs_error("No Bearer [%d]", (int)e_rab->e_RAB_ID);
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r = s1ap_send_error_indication2(mme_ue,
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S1AP_Cause_PR_radioNetwork,
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S1AP_CauseRadioNetwork_unknown_E_RAB_ID);
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ogs_expect(r == OGS_OK);
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ogs_assert(r != OGS_ERROR);
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return;
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}
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linked_bearer = mme_linked_bearer(bearer);
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ogs_assert(linked_bearer);
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ogs_debug(" Linked-EBI[%d]", linked_bearer->ebi);
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if (bearer->ebi == linked_bearer->ebi) {
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sgw_ue = sgw_ue_find_by_id(mme_ue->sgw_ue_id);
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ogs_assert(sgw_ue);
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sess = mme_sess_find_by_id(bearer->sess_id);
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ogs_assert(sess);
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/* Radio failure cleanup:
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* delete session without E-RAB release procedure */
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ogs_assert(OGS_OK ==
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mme_gtp_send_delete_session_request(enb_ue, sgw_ue, sess,
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OGS_GTP_DELETE_NO_ACTION));
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ogs_warn("Delete Session Request");
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} else {
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ogs_error("Not implemented : remove dedicated bearer");
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}
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}
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}
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@ -115,7 +115,7 @@ static void bearer_timeout(ogs_gtp_xact_t *xact, void *data)
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bearer = sgwc_bearer_find_by_id(bearer_id);
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if (!bearer) {
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ogs_error("Bearer has already been removed [%d]", type);
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ogs_warn("Bearer has already been removed [%d]", type);
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return;
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}
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@ -42,7 +42,7 @@ static void gtp_bearer_timeout(ogs_gtp_xact_t *xact, void *data)
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bearer = smf_bearer_find_by_id(bearer_id);
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if (!bearer) {
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ogs_error("Bearer has already been removed [%d]", type);
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ogs_warn("Bearer has already been removed [%d]", type);
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return;
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}
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@ -688,12 +688,336 @@ static void test2_func(abts_case *tc, void *data)
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test_ue_remove(test_ue);
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}
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static void test_issues4141_func(abts_case *tc, void *data)
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{
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int rv;
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ogs_socknode_t *s1ap;
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ogs_socknode_t *gtpu;
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ogs_pkbuf_t *emmbuf;
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ogs_pkbuf_t *esmbuf;
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ogs_pkbuf_t *sendbuf;
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ogs_pkbuf_t *recvbuf;
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ogs_s1ap_message_t message;
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ogs_nas_5gs_mobile_identity_suci_t mobile_identity_suci;
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test_ue_t *test_ue = NULL;
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test_sess_t *sess = NULL;
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test_bearer_t *bearer = NULL;
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bson_t *doc = NULL;
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/* Setup Test UE & Session Context */
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memset(&mobile_identity_suci, 0, sizeof(mobile_identity_suci));
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mobile_identity_suci.h.supi_format = OGS_NAS_5GS_SUPI_FORMAT_IMSI;
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mobile_identity_suci.h.type = OGS_NAS_5GS_MOBILE_IDENTITY_SUCI;
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mobile_identity_suci.routing_indicator1 = 0;
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mobile_identity_suci.routing_indicator2 = 0xf;
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mobile_identity_suci.routing_indicator3 = 0xf;
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mobile_identity_suci.routing_indicator4 = 0xf;
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mobile_identity_suci.protection_scheme_id = OGS_PROTECTION_SCHEME_NULL;
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mobile_identity_suci.home_network_pki_value = 0;
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test_ue = test_ue_add_by_suci(&mobile_identity_suci, "1032548691");
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ogs_assert(test_ue);
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test_ue->e_cgi.cell_id = 0x1079baf;
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test_ue->nas.ksi = OGS_NAS_KSI_NO_KEY_IS_AVAILABLE;
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test_ue->nas.value = OGS_NAS_ATTACH_TYPE_COMBINED_EPS_IMSI_ATTACH;
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test_ue->k_string = "465b5ce8b199b49faa5f0a2ee238a6bc";
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test_ue->opc_string = "e8ed289deba952e4283b54e88e6183ca";
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sess = test_sess_add_by_apn(test_ue, "internet", OGS_GTP2_RAT_TYPE_EUTRAN);
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ogs_assert(sess);
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/* eNB connects to MME */
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s1ap = tests1ap_client(AF_INET);
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ABTS_PTR_NOTNULL(tc, s1ap);
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/* eNB connects to SGW */
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gtpu = test_gtpu_server(1, AF_INET);
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ABTS_PTR_NOTNULL(tc, gtpu);
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/* Send S1-Setup Reqeust */
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sendbuf = test_s1ap_build_s1_setup_request(
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S1AP_ENB_ID_PR_macroENB_ID, 0x54f64);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive S1-Setup Response */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(NULL, recvbuf);
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/********** Insert Subscriber in Database */
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doc = test_db_new_session(test_ue);
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ABTS_PTR_NOTNULL(tc, doc);
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ABTS_INT_EQUAL(tc, OGS_OK, test_db_insert_ue(test_ue, doc));
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/* Send Attach Request */
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memset(&sess->pdn_connectivity_param,
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0, sizeof(sess->pdn_connectivity_param));
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sess->pdn_connectivity_param.eit = 1;
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sess->pdn_connectivity_param.request_type =
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OGS_NAS_EPS_REQUEST_TYPE_INITIAL;
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esmbuf = testesm_build_pdn_connectivity_request(
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sess, false, OGS_NAS_EPS_PDN_TYPE_IPV4V6);
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ABTS_PTR_NOTNULL(tc, esmbuf);
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memset(&test_ue->attach_request_param,
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0, sizeof(test_ue->attach_request_param));
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test_ue->attach_request_param.drx_parameter = 1;
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test_ue->attach_request_param.ms_network_capability = 1;
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test_ue->attach_request_param.tmsi_status = 1;
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test_ue->attach_request_param.mobile_station_classmark_2 = 1;
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test_ue->attach_request_param.ue_usage_setting = 1;
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emmbuf = testemm_build_attach_request(test_ue, esmbuf, true, false);
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ABTS_PTR_NOTNULL(tc, emmbuf);
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memset(&test_ue->initial_ue_param, 0, sizeof(test_ue->initial_ue_param));
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sendbuf = test_s1ap_build_initial_ue_message(
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test_ue, emmbuf, S1AP_RRC_Establishment_Cause_mo_Signalling, false);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive Authentication Request */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(test_ue, recvbuf);
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/* Send Authentication response */
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emmbuf = testemm_build_authentication_response(test_ue);
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ABTS_PTR_NOTNULL(tc, emmbuf);
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sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, emmbuf);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive Security mode Command */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(test_ue, recvbuf);
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/* Send Security mode complete */
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test_ue->mobile_identity_imeisv_presence = true;
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emmbuf = testemm_build_security_mode_complete(test_ue);
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ABTS_PTR_NOTNULL(tc, emmbuf);
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sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, emmbuf);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive ESM Information Request */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(test_ue, recvbuf);
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/* Send ESM Information Response */
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sess->esm_information_param.pco = 1;
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esmbuf = testesm_build_esm_information_response(sess);
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ABTS_PTR_NOTNULL(tc, esmbuf);
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sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, esmbuf);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive Initial Context Setup Request +
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* Attach Accept +
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* Activate Default Bearer Context Request */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(test_ue, recvbuf);
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/* Send UE Capability Info Indication */
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sendbuf = tests1ap_build_ue_radio_capability_info_indication(test_ue);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Send Initial Context Setup Response */
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sendbuf = test_s1ap_build_initial_context_setup_response(test_ue);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Send Attach Complete + Activate default EPS bearer cotext accept */
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test_ue->nr_cgi.cell_id = 0x1234502;
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bearer = test_bearer_find_by_ue_ebi(test_ue, 5);
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ogs_assert(bearer);
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esmbuf = testesm_build_activate_default_eps_bearer_context_accept(
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bearer, false);
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ABTS_PTR_NOTNULL(tc, esmbuf);
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emmbuf = testemm_build_attach_complete(test_ue, esmbuf);
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ABTS_PTR_NOTNULL(tc, emmbuf);
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sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, emmbuf);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive EMM information */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(test_ue, recvbuf);
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/* Send PDN Connectivity Request */
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sess = test_sess_add_by_apn(test_ue, "ims", OGS_GTP2_RAT_TYPE_EUTRAN);
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ogs_assert(sess);
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sess->pti = 5;
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sess->pdn_connectivity_param.apn = 1;
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sess->pdn_connectivity_param.pco = 1;
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sess->pdn_connectivity_param.request_type =
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OGS_NAS_EPS_REQUEST_TYPE_INITIAL;
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esmbuf = testesm_build_pdn_connectivity_request(
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sess, true, OGS_NAS_EPS_PDN_TYPE_IPV4V6);
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ABTS_PTR_NOTNULL(tc, esmbuf);
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sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, esmbuf);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive E-RABSetupRequest +
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* Activate default EPS bearer context request */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(test_ue, recvbuf);
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ABTS_INT_EQUAL(tc,
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S1AP_ProcedureCode_id_E_RABSetup,
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test_ue->s1ap_procedure_code);
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/* Send E-RABSetupResponse */
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bearer = test_bearer_find_by_ue_ebi(test_ue, 6);
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ogs_assert(bearer);
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sendbuf = test_s1ap_build_e_rab_failed_setup_response(
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bearer,
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S1AP_Cause_PR_radioNetwork,
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S1AP_CauseRadioNetwork_failure_in_radio_interface_procedure);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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ogs_msleep(100);
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/* Again - Send PDN Connectivity Request */
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sess->pti = 6;
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sess->pdn_connectivity_param.apn = 1;
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sess->pdn_connectivity_param.pco = 1;
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sess->pdn_connectivity_param.request_type =
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OGS_NAS_EPS_REQUEST_TYPE_INITIAL;
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esmbuf = testesm_build_pdn_connectivity_request(
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sess, true, OGS_NAS_EPS_PDN_TYPE_IPV4V6);
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ABTS_PTR_NOTNULL(tc, esmbuf);
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sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, esmbuf);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
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ABTS_INT_EQUAL(tc, OGS_OK, rv);
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/* Receive E-RABSetupRequest +
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* Activate default EPS bearer context request */
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recvbuf = testenb_s1ap_read(s1ap);
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ABTS_PTR_NOTNULL(tc, recvbuf);
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tests1ap_recv(test_ue, recvbuf);
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ABTS_INT_EQUAL(tc,
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S1AP_ProcedureCode_id_E_RABSetup,
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test_ue->s1ap_procedure_code);
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/* Send E-RABSetupResponse */
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bearer = test_bearer_find_by_ue_ebi(test_ue, 8);
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ogs_assert(bearer);
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sendbuf = test_s1ap_build_e_rab_setup_response(bearer);
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ABTS_PTR_NOTNULL(tc, sendbuf);
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rv = testenb_s1ap_send(s1ap, sendbuf);
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, rv);
|
||||
|
||||
/* Send Activate default EPS bearer context accept */
|
||||
esmbuf = testesm_build_activate_default_eps_bearer_context_accept(
|
||||
bearer, true);
|
||||
ABTS_PTR_NOTNULL(tc, esmbuf);
|
||||
sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, esmbuf);
|
||||
ABTS_PTR_NOTNULL(tc, sendbuf);
|
||||
rv = testenb_s1ap_send(s1ap, sendbuf);
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, rv);
|
||||
|
||||
/* Receive E-RABSetupRequest +
|
||||
* Activate dedicated EPS bearer context request */
|
||||
recvbuf = testenb_s1ap_read(s1ap);
|
||||
ABTS_PTR_NOTNULL(tc, recvbuf);
|
||||
tests1ap_recv(test_ue, recvbuf);
|
||||
ABTS_INT_EQUAL(tc,
|
||||
S1AP_ProcedureCode_id_E_RABSetup,
|
||||
test_ue->s1ap_procedure_code);
|
||||
|
||||
/* Send Activate dedicated EPS bearer context accept */
|
||||
bearer = test_bearer_find_by_ue_ebi(test_ue, 9);
|
||||
ogs_assert(bearer);
|
||||
esmbuf = testesm_build_activate_dedicated_eps_bearer_context_accept(bearer);
|
||||
ABTS_PTR_NOTNULL(tc, esmbuf);
|
||||
sendbuf = test_s1ap_build_uplink_nas_transport(test_ue, esmbuf);
|
||||
ABTS_PTR_NOTNULL(tc, sendbuf);
|
||||
rv = testenb_s1ap_send(s1ap, sendbuf);
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, rv);
|
||||
|
||||
/* Send E-RABSetupResponse */
|
||||
sendbuf = test_s1ap_build_e_rab_setup_response(bearer);
|
||||
ABTS_PTR_NOTNULL(tc, sendbuf);
|
||||
rv = testenb_s1ap_send(s1ap, sendbuf);
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, rv);
|
||||
|
||||
/* DELAY is needed in dedicated EPS bearer */
|
||||
ogs_msleep(100);
|
||||
|
||||
/* Send GTP-U ICMP Packet */
|
||||
rv = test_gtpu_send_ping(gtpu, bearer, TEST_PING_IPV4);
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, rv);
|
||||
|
||||
/* Receive GTP-U ICMP Packet */
|
||||
recvbuf = test_gtpu_read(gtpu);
|
||||
ABTS_PTR_NOTNULL(tc, recvbuf);
|
||||
ogs_pkbuf_free(recvbuf);
|
||||
|
||||
/* Send UE Context Release Request */
|
||||
sendbuf = test_s1ap_build_ue_context_release_request(test_ue,
|
||||
S1AP_Cause_PR_radioNetwork, S1AP_CauseRadioNetwork_user_inactivity);
|
||||
ABTS_PTR_NOTNULL(tc, sendbuf);
|
||||
rv = testenb_s1ap_send(s1ap, sendbuf);
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, rv);
|
||||
|
||||
/* Receive UE Context Release Command */
|
||||
recvbuf = testenb_s1ap_read(s1ap);
|
||||
ABTS_PTR_NOTNULL(tc, recvbuf);
|
||||
tests1ap_recv(test_ue, recvbuf);
|
||||
|
||||
/* Send UE Context Release Complete */
|
||||
sendbuf = test_s1ap_build_ue_context_release_complete(test_ue);
|
||||
ABTS_PTR_NOTNULL(tc, sendbuf);
|
||||
rv = testenb_s1ap_send(s1ap, sendbuf);
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, rv);
|
||||
|
||||
ogs_msleep(300);
|
||||
|
||||
/********** Remove Subscriber in Database */
|
||||
ABTS_INT_EQUAL(tc, OGS_OK, test_db_remove_ue(test_ue));
|
||||
|
||||
/* eNB disonncect from MME */
|
||||
testenb_s1ap_close(s1ap);
|
||||
|
||||
/* eNB disonncect from SGW */
|
||||
test_gtpu_close(gtpu);
|
||||
|
||||
test_ue_remove(test_ue);
|
||||
}
|
||||
|
||||
abts_suite *test_session(abts_suite *suite)
|
||||
{
|
||||
suite = ADD_SUITE(suite)
|
||||
|
||||
abts_run_test(suite, test1_func, NULL);
|
||||
abts_run_test(suite, test2_func, NULL);
|
||||
abts_run_test(suite, test_issues4141_func, NULL);
|
||||
|
||||
return suite;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue