Hugging Face's logo

Datasets:
umakantk
/
janusdata

Tags:
janus
5g
nextg
Dataset card Files
xet
 Community
janusdata / raw_data /open5gs_source_code /src /mme /s1ap-handler.c
UmakantKulkarni
Add Training and Eval dataset
258fb37
Raw
History Blame Contribute Delete
145 kB
/*
 * Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
 *
 * This file is part of Open5GS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */
#include "mme-event.h"
#include "mme-timer.h"
#include "s1ap-path.h"
#include "nas-path.h"
#include "mme-fd-path.h"
#include "mme-gtp-path.h"
#include "sgsap-types.h"
#include "sgsap-path.h"
#include "mme-s11-build.h"
#include "s1ap-build.h"
#include "s1ap-handler.h"
#include "mme-path.h"
#include "mme-sm.h"
static bool maximum_number_of_enbs_is_reached(void)
{
 mme_enb_t *enb = NULL, *next_enb = NULL;
 int number_of_enbs_online = 0;
ogs_list_for_each_safe(&mme_self()->enb_list, next_enb, enb) {
 if (enb->state.s1_setup_success) {
 number_of_enbs_online++;
 }
 }
return number_of_enbs_online >= ogs_global_conf()->max.peer;
}
static bool enb_plmn_id_is_foreign(mme_enb_t *enb)
{
 int i;
for (i = 0; i < enb->num_of_supported_ta_list; i++) {
 if (memcmp(&enb->plmn_id, &enb->supported_ta_list[i].plmn_id,
 OGS_PLMN_ID_LEN) == 0)
 return false;
 }
return true;
}
static bool served_tai_is_found(mme_enb_t *enb)
{
 int i;
 int served_tai_index;
for (i = 0; i < enb->num_of_supported_ta_list; i++) {
 served_tai_index = mme_find_served_tai(&enb->supported_ta_list[i]);
 if (served_tai_index >= 0 &&
 served_tai_index < OGS_MAX_NUM_OF_SUPPORTED_TA) {
 ogs_debug(" SERVED_TAI_INDEX[%d]", served_tai_index);
 return true;
 }
 }
return false;
}
void s1ap_handle_s1_setup_request(mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, j, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_S1SetupRequest_t *S1SetupRequest = NULL;
S1AP_S1SetupRequestIEs_t *ie = NULL;
 S1AP_Global_ENB_ID_t *Global_ENB_ID = NULL;
 S1AP_SupportedTAs_t *SupportedTAs = NULL;
 S1AP_PagingDRX_t *PagingDRX = NULL;
uint32_t enb_id;
 S1AP_Cause_PR group = S1AP_Cause_PR_NOTHING;
 long cause = 0;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 S1SetupRequest = &initiatingMessage->value.choice.S1SetupRequest;
 ogs_assert(S1SetupRequest);
ogs_debug("S1SetupRequest");
for (i = 0; i < S1SetupRequest->protocolIEs.list.count; i++) {
 ie = S1SetupRequest->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_Global_ENB_ID:
 Global_ENB_ID = &ie->value.choice.Global_ENB_ID;
 break;
 case S1AP_ProtocolIE_ID_id_SupportedTAs:
 SupportedTAs = &ie->value.choice.SupportedTAs;
 break;
 case S1AP_ProtocolIE_ID_id_DefaultPagingDRX:
 PagingDRX = &ie->value.choice.PagingDRX;
 break;
 default:
 break;
 }
 }
if (!Global_ENB_ID) {
 ogs_error("No Global_ENB_ID");
 group = S1AP_Cause_PR_misc;
 cause = S1AP_CauseProtocol_semantic_error;
r = s1ap_send_s1_setup_failure(enb, group, cause);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!SupportedTAs) {
 ogs_error("No SupportedTAs");
 group = S1AP_Cause_PR_misc;
 cause = S1AP_CauseProtocol_semantic_error;
r = s1ap_send_s1_setup_failure(enb, group, cause);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_s1ap_ENB_ID_to_uint32(&Global_ENB_ID->eNB_ID, &enb_id);
 ogs_debug(" IP[%s] ENB_ID[%d]", OGS_ADDR(enb->sctp.addr, buf), enb_id);
mme_enb_set_enb_id(enb, enb_id);
memcpy(&enb->plmn_id,
 Global_ENB_ID->pLMNidentity.buf, sizeof(enb->plmn_id));
 ogs_debug(" PLMN_ID[MCC:%d MNC:%d]",
 ogs_plmn_id_mcc(&enb->plmn_id), ogs_plmn_id_mnc(&enb->plmn_id));
if (PagingDRX)
 ogs_debug(" PagingDRX[%ld]", *PagingDRX);
/* Parse Supported TA */
 for (i = 0, enb->num_of_supported_ta_list = 0;
 i < SupportedTAs->list.count &&
 enb->num_of_supported_ta_list < OGS_MAX_NUM_OF_SUPPORTED_TA;
 i++) {
 S1AP_SupportedTAs_Item_t *SupportedTAs_Item = NULL;
 S1AP_TAC_t *tAC = NULL;
SupportedTAs_Item =
 (S1AP_SupportedTAs_Item_t *)SupportedTAs->list.array[i];
 ogs_assert(SupportedTAs_Item);
 tAC = &SupportedTAs_Item->tAC;
 ogs_assert(tAC);
for (j = 0; j < SupportedTAs_Item->broadcastPLMNs.list.count; j++) {
 S1AP_PLMNidentity_t *pLMNidentity = NULL;
 pLMNidentity = (S1AP_PLMNidentity_t *)
 SupportedTAs_Item->broadcastPLMNs.list.array[j];
 ogs_assert(pLMNidentity);
if (enb->num_of_supported_ta_list >=
 OGS_ARRAY_SIZE(enb->supported_ta_list)) {
 ogs_error("OVERFLOW ENB->num_of_supported_ta_list "
 "[%d:%d:%d]",
 enb->num_of_supported_ta_list,
 OGS_MAX_NUM_OF_SUPPORTED_TA,
 (int)OGS_ARRAY_SIZE(enb->supported_ta_list));
 break;
 }
memcpy(&enb->supported_ta_list[enb->num_of_supported_ta_list].tac,
 tAC->buf, sizeof(uint16_t));
 enb->supported_ta_list[enb->num_of_supported_ta_list].tac =
 be16toh(enb->supported_ta_list
 [enb->num_of_supported_ta_list].tac);
 memcpy(&enb->supported_ta_list
 [enb->num_of_supported_ta_list].plmn_id,
 pLMNidentity->buf, sizeof(ogs_plmn_id_t));
 ogs_debug(" PLMN_ID[MCC:%d MNC:%d] TAC[%d]",
 ogs_plmn_id_mcc(&enb->supported_ta_list
 [enb->num_of_supported_ta_list].plmn_id),
 ogs_plmn_id_mnc(&enb->supported_ta_list
 [enb->num_of_supported_ta_list].plmn_id),
 enb->supported_ta_list[enb->num_of_supported_ta_list].tac);
 enb->num_of_supported_ta_list++;
 }
 }
if (maximum_number_of_enbs_is_reached()) {
 ogs_warn("S1-Setup failure:");
 ogs_warn(" Maximum number of eNBs reached");
 group = S1AP_Cause_PR_misc;
 cause = S1AP_CauseMisc_unspecified;
r = s1ap_send_s1_setup_failure(enb, group, cause);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
/*
 * TS36.413
 * Section 8.7.3.4 Abnormal Conditions
 *
 * If the eNB initiates the procedure by sending a S1 SETUP REQUEST
 * message including the PLMN Identity IEs and none of the PLMNs
 * provided by the eNB is identified by the MME, then the MME shall
 * reject the eNB S1 Setup Request procedure with the appropriate cause
 * value, e.g., “Unknown PLMN”.
 */
 if (enb_plmn_id_is_foreign(enb)) {
 ogs_warn("S1-Setup failure:");
 ogs_warn(" Global-ENB-ID PLMN-ID is foreign");
 group = S1AP_Cause_PR_misc;
 cause = S1AP_CauseMisc_unknown_PLMN;
r = s1ap_send_s1_setup_failure(enb, group, cause);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!served_tai_is_found(enb)) {
 ogs_warn("S1-Setup failure:");
 ogs_warn(" Cannot find Served TAI. Check 'mme.tai' configuration");
 group = S1AP_Cause_PR_misc;
 cause = S1AP_CauseMisc_unknown_PLMN;
r = s1ap_send_s1_setup_failure(enb, group, cause);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb->state.s1_setup_success = true;
 r = s1ap_send_s1_setup_response(enb);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
}
void s1ap_handle_enb_configuration_update(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 int i, j, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_ENBConfigurationUpdate_t *ENBConfigurationUpdate = NULL;
S1AP_ENBConfigurationUpdateIEs_t *ie = NULL;
 S1AP_SupportedTAs_t *SupportedTAs = NULL;
 S1AP_PagingDRX_t *PagingDRX = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 ENBConfigurationUpdate =
 &initiatingMessage->value.choice.ENBConfigurationUpdate;
 ogs_assert(ENBConfigurationUpdate);
ogs_debug("ENBConfigurationUpdate");
for (i = 0; i < ENBConfigurationUpdate->protocolIEs.list.count; i++) {
 ie = ENBConfigurationUpdate->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_SupportedTAs:
 SupportedTAs = &ie->value.choice.SupportedTAs;
 break;
 case S1AP_ProtocolIE_ID_id_DefaultPagingDRX:
 PagingDRX = &ie->value.choice.PagingDRX;
 break;
 default:
 break;
 }
 }
/* Parse Supported TA */
 if (SupportedTAs) {
 S1AP_Cause_PR group = S1AP_Cause_PR_NOTHING;
 long cause = 0;
for (i = 0, enb->num_of_supported_ta_list = 0;
 i < SupportedTAs->list.count &&
 enb->num_of_supported_ta_list < OGS_MAX_NUM_OF_SUPPORTED_TA;
 i++) {
 S1AP_SupportedTAs_Item_t *SupportedTAs_Item = NULL;
 S1AP_TAC_t *tAC = NULL;
SupportedTAs_Item =
 (S1AP_SupportedTAs_Item_t *)SupportedTAs->list.array[i];
 ogs_assert(SupportedTAs_Item);
 tAC = &SupportedTAs_Item->tAC;
 ogs_assert(tAC);
for (j = 0; j < SupportedTAs_Item->broadcastPLMNs.list.count; j++) {
 S1AP_PLMNidentity_t *pLMNidentity = NULL;
 pLMNidentity = (S1AP_PLMNidentity_t *)
 SupportedTAs_Item->broadcastPLMNs.list.array[j];
 ogs_assert(pLMNidentity);
if (enb->num_of_supported_ta_list >=
 OGS_ARRAY_SIZE(enb->supported_ta_list)) {
 ogs_error("OVERFLOW ENB->num_of_supported_ta_list "
 "[%d:%d:%d]",
 enb->num_of_supported_ta_list,
 OGS_MAX_NUM_OF_SUPPORTED_TA,
 (int)OGS_ARRAY_SIZE(enb->supported_ta_list));
 break;
 }
memcpy(&enb->supported_ta_list[
 enb->num_of_supported_ta_list].tac,
 tAC->buf, sizeof(uint16_t));
 enb->supported_ta_list[enb->num_of_supported_ta_list].tac =
 be16toh(enb->supported_ta_list
 [enb->num_of_supported_ta_list].tac);
 memcpy(&enb->supported_ta_list
 [enb->num_of_supported_ta_list].plmn_id,
 pLMNidentity->buf, sizeof(ogs_plmn_id_t));
 ogs_debug(" PLMN_ID[MCC:%d MNC:%d] TAC[%d]",
 ogs_plmn_id_mcc(&enb->supported_ta_list
 [enb->num_of_supported_ta_list].plmn_id),
 ogs_plmn_id_mnc(&enb->supported_ta_list
 [enb->num_of_supported_ta_list].plmn_id),
 enb->supported_ta_list[enb->num_of_supported_ta_list].tac);
 enb->num_of_supported_ta_list++;
 }
 }
/*
 * TS36.413
 * Section 8.7.3.4 Abnormal Conditions
 *
 * If the eNB initiates the procedure by sending a S1 SETUP REQUEST
 * message including the PLMN Identity IEs and none of the PLMNs
 * provided by the eNB is identified by the MME, then the MME shall
 * reject the eNB S1 Setup Request procedure with the appropriate cause
 * value, e.g., “Unknown PLMN”.
 */
 if (enb_plmn_id_is_foreign(enb)) {
 ogs_warn("S1-Setup failure:");
 ogs_warn(" Global-ENB-ID PLMN-ID is foreign");
 group = S1AP_Cause_PR_misc;
 cause = S1AP_CauseMisc_unknown_PLMN;
r = s1ap_send_enb_configuration_update_failure(enb, group, cause);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!served_tai_is_found(enb)) {
 ogs_warn("S1-Setup failure:");
 ogs_warn(" Cannot find Served TAI. "
 "Check 'mme.tai' configuration");
 group = S1AP_Cause_PR_misc;
 cause = S1AP_CauseMisc_unknown_PLMN;
r = s1ap_send_enb_configuration_update_failure(enb, group, cause);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 }
if (PagingDRX)
 ogs_debug(" PagingDRX[%ld]", *PagingDRX);
r = s1ap_send_enb_configuration_update_ack(enb);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
}
void s1ap_handle_initial_ue_message(mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 int i, r;
 char buf[OGS_ADDRSTRLEN];
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_InitialUEMessage_t *InitialUEMessage = NULL;
S1AP_InitialUEMessage_IEs_t *ie = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_NAS_PDU_t *NAS_PDU = NULL;
 S1AP_TAI_t *TAI = NULL;
 S1AP_EUTRAN_CGI_t *EUTRAN_CGI = NULL;
 S1AP_S_TMSI_t *S_TMSI = NULL;
S1AP_PLMNidentity_t *pLMNidentity = NULL;
 S1AP_TAC_t *tAC = NULL;
 S1AP_CellIdentity_t *cell_ID = NULL;
enb_ue_t *enb_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 InitialUEMessage = &initiatingMessage->value.choice.InitialUEMessage;
 ogs_assert(InitialUEMessage);
ogs_info("InitialUEMessage");
for (i = 0; i < InitialUEMessage->protocolIEs.list.count; i++) {
 ie = InitialUEMessage->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_NAS_PDU:
 NAS_PDU = &ie->value.choice.NAS_PDU;
 break;
 case S1AP_ProtocolIE_ID_id_TAI:
 TAI = &ie->value.choice.TAI;
 break;
 case S1AP_ProtocolIE_ID_id_EUTRAN_CGI:
 EUTRAN_CGI = &ie->value.choice.EUTRAN_CGI;
 break;
 case S1AP_ProtocolIE_ID_id_S_TMSI:
 S_TMSI = &ie->value.choice.S_TMSI;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_enb_ue_s1ap_id(enb, *ENB_UE_S1AP_ID);
 if (!enb_ue) {
 enb_ue = enb_ue_add(enb, *ENB_UE_S1AP_ID);
 if (enb_ue == NULL) {
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_misc,
 S1AP_CauseMisc_control_processing_overload);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
/* Find MME_UE if S_TMSI included */
 if (S_TMSI) {
 served_gummei_t *served_gummei = &mme_self()->served_gummei[0];
 ogs_nas_eps_guti_t nas_guti;
 mme_ue_t *mme_ue = NULL;
memset(&nas_guti, 0, sizeof(ogs_nas_eps_guti_t));
/* Use the first configured plmn_id and mme group id */
 ogs_nas_from_plmn_id(&nas_guti.nas_plmn_id,
 &served_gummei->plmn_id[0]);
 nas_guti.mme_gid = served_gummei->mme_gid[0];
/* size must be 1 */
 memcpy(&nas_guti.mme_code, S_TMSI->mMEC.buf, S_TMSI->mMEC.size);
 /* size must be 4 */
 memcpy(&nas_guti.m_tmsi, S_TMSI->m_TMSI.buf, S_TMSI->m_TMSI.size);
 nas_guti.m_tmsi = be32toh(nas_guti.m_tmsi);
mme_ue = mme_ue_find_by_guti(&nas_guti);
 if (!mme_ue) {
 ogs_info("Unknown UE by S_TMSI[G:%d,C:%d,M_TMSI:0x%x]",
 nas_guti.mme_gid, nas_guti.mme_code, nas_guti.m_tmsi);
 } else {
 ogs_info(" S_TMSI[G:%d,C:%d,M_TMSI:0x%x] IMSI:[%s]",
 mme_ue->current.guti.mme_gid,
 mme_ue->current.guti.mme_code,
 mme_ue->current.guti.m_tmsi,
 MME_UE_HAVE_IMSI(mme_ue)
 ? mme_ue->imsi_bcd : "Unknown");
/* If NAS(mme_ue_t) has already been associated with
 * older S1(enb_ue_t) context */
 if (ECM_CONNECTED(mme_ue)) {
 /*
 * Issue #2786
 *
 * In cases where the UE sends an Integrity Un-Protected Attach
 * Request or Service Request, there is an issue of sending
 * a UEContextReleaseCommand for the OLD ENB Context.
 *
 * For example, if the UE switchs off and power-on after
 * the first connection, the EPC sends a UEContextReleaseCommand.
 *
 * However, since there is no ENB context for this on the eNB,
 * the eNB does not send a UEContextReleaseComplete,
 * so the deletion of the ENB Context does not function properly.
 *
 * To solve this problem, the EPC has been modified to implicitly
 * delete the ENB Context instead of sending a UEContextReleaseCommand.
 */
 HOLDING_S1_CONTEXT(mme_ue);
 }
 enb_ue_associate_mme_ue(enb_ue, mme_ue);
 ogs_debug("Mobile Reachable timer stopped for IMSI[%s]",
 mme_ue->imsi_bcd);
 CLEAR_MME_UE_TIMER(mme_ue->t_mobile_reachable);
 }
 }
 } else {
 mme_ue_t *mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 ogs_error("Known UE ENB_UE_S1AP_ID[%d] [%p:%p]",
 (int)*ENB_UE_S1AP_ID, enb_ue, mme_ue);
 if (mme_ue) {
 ogs_error(" S_TMSI[G:%d,C:%d,M_TMSI:0x%x] IMSI:[%s]",
 mme_ue->current.guti.mme_gid,
 mme_ue->current.guti.mme_code,
 mme_ue->current.guti.m_tmsi,
 MME_UE_HAVE_IMSI(mme_ue) ? mme_ue->imsi_bcd : "Unknown");
 }
 }
if (!NAS_PDU) {
 ogs_error("No NAS_PDU");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!TAI) {
 ogs_error("No TAI");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!EUTRAN_CGI) {
 ogs_error("No EUTRAN_CGI");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
pLMNidentity = &TAI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 tAC = &TAI->tAC;
 ogs_assert(tAC && tAC->size == sizeof(uint16_t));
memcpy(&enb_ue->saved.tai.plmn_id, pLMNidentity->buf,
 sizeof(enb_ue->saved.tai.plmn_id));
 memcpy(&enb_ue->saved.tai.tac, tAC->buf, sizeof(enb_ue->saved.tai.tac));
 enb_ue->saved.tai.tac = be16toh(enb_ue->saved.tai.tac);
pLMNidentity = &EUTRAN_CGI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 cell_ID = &EUTRAN_CGI->cell_ID;
 ogs_assert(cell_ID);
 memcpy(&enb_ue->saved.e_cgi.plmn_id, pLMNidentity->buf,
 sizeof(enb_ue->saved.e_cgi.plmn_id));
 memcpy(&enb_ue->saved.e_cgi.cell_id, cell_ID->buf,
 sizeof(enb_ue->saved.e_cgi.cell_id));
 enb_ue->saved.e_cgi.cell_id = (be32toh(enb_ue->saved.e_cgi.cell_id) >> 4);
ogs_info(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d] TAC[%d] CellID[0x%x]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id,
 enb_ue->saved.tai.tac, enb_ue->saved.e_cgi.cell_id);
ogs_expect(OGS_OK == s1ap_send_to_nas(
 enb_ue, S1AP_ProcedureCode_id_initialUEMessage, NAS_PDU));
}
void s1ap_handle_uplink_nas_transport(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_UplinkNASTransport_t *UplinkNASTransport = NULL;
S1AP_UplinkNASTransport_IEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_NAS_PDU_t *NAS_PDU = NULL;
 S1AP_EUTRAN_CGI_t *EUTRAN_CGI = NULL;
 S1AP_TAI_t *TAI = NULL;
S1AP_PLMNidentity_t *pLMNidentity = NULL;
 S1AP_TAC_t *tAC = NULL;
 S1AP_CellIdentity_t *cell_ID = NULL;
enb_ue_t *enb_ue = NULL;
 mme_ue_t *mme_ue = NULL;
ogs_eps_tai_t tai;
 int served_tai_index = 0;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 UplinkNASTransport = &initiatingMessage->value.choice.UplinkNASTransport;
 ogs_assert(UplinkNASTransport);
ogs_debug("UplinkNASTransport");
for (i = 0; i < UplinkNASTransport->protocolIEs.list.count; i++) {
 ie = UplinkNASTransport->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_NAS_PDU:
 NAS_PDU = &ie->value.choice.NAS_PDU;
 break;
 case S1AP_ProtocolIE_ID_id_EUTRAN_CGI:
 EUTRAN_CGI = &ie->value.choice.EUTRAN_CGI;
 break;
 case S1AP_ProtocolIE_ID_id_TAI:
 TAI = &ie->value.choice.TAI;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
if (!NAS_PDU) {
 ogs_error("No NAS_PDU");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!EUTRAN_CGI) {
 ogs_error("No EUTRAN_CGI");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!TAI) {
 ogs_error("No TAI");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
pLMNidentity = &TAI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 tAC = &TAI->tAC;
 ogs_assert(tAC && tAC->size == sizeof(uint16_t));
memcpy(&tai.plmn_id, pLMNidentity->buf, sizeof(tai.plmn_id));
 memcpy(&tai.tac, tAC->buf, sizeof(tai.tac));
 tai.tac = be16toh(tai.tac);
/* Check TAI */
 served_tai_index = mme_find_served_tai(&tai);
 if (served_tai_index < 0) {
 ogs_error("Cannot find Served TAI[PLMN_ID:%06x,TAC:%d]",
 ogs_plmn_id_hexdump(&tai.plmn_id), tai.tac);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_message_not_compatible_with_receiver_state);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 ogs_debug(" SERVED_TAI_INDEX[%d]", served_tai_index);
pLMNidentity = &EUTRAN_CGI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 cell_ID = &EUTRAN_CGI->cell_ID;
 ogs_assert(cell_ID);
 memcpy(&enb_ue->saved.e_cgi.plmn_id, pLMNidentity->buf,
 sizeof(enb_ue->saved.e_cgi.plmn_id));
 memcpy(&enb_ue->saved.e_cgi.cell_id, cell_ID->buf,
 sizeof(enb_ue->saved.e_cgi.cell_id));
 enb_ue->saved.e_cgi.cell_id = (be32toh(enb_ue->saved.e_cgi.cell_id) >> 4);
memcpy(&enb_ue->saved.tai.plmn_id, pLMNidentity->buf,
 sizeof(enb_ue->saved.tai.plmn_id));
 memcpy(&enb_ue->saved.tai.tac, tAC->buf, sizeof(enb_ue->saved.tai.tac));
 enb_ue->saved.tai.tac = be16toh(enb_ue->saved.tai.tac);
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d] TAC[%d] CellID[0x%x]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id,
 enb_ue->saved.tai.tac, enb_ue->saved.e_cgi.cell_id);
/* Copy Stream-No/TAI/ECGI from enb_ue */
 mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (mme_ue) {
 memcpy(&mme_ue->tai, &enb_ue->saved.tai, sizeof(ogs_eps_tai_t));
 memcpy(&mme_ue->e_cgi, &enb_ue->saved.e_cgi, sizeof(ogs_e_cgi_t));
 mme_ue->ue_location_timestamp = ogs_time_now();
 } else {
 ogs_error("No UE Context in UplinkNASTransport");
 }
ogs_expect(OGS_OK == s1ap_send_to_nas(
 enb_ue, S1AP_ProcedureCode_id_uplinkNASTransport, NAS_PDU));
}
void s1ap_handle_ue_capability_info_indication(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_UECapabilityInfoIndication_t *UECapabilityInfoIndication = NULL;
S1AP_UECapabilityInfoIndicationIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_UERadioCapability_t *UERadioCapability = NULL;
enb_ue_t *enb_ue = NULL;
 mme_ue_t *mme_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 UECapabilityInfoIndication =
 &initiatingMessage->value.choice.UECapabilityInfoIndication;
 ogs_assert(UECapabilityInfoIndication);
ogs_debug("UECapabilityInfoIndication");
for (i = 0; i < UECapabilityInfoIndication->protocolIEs.list.count; i++) {
 ie = UECapabilityInfoIndication->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_UERadioCapability:
 UERadioCapability = &ie->value.choice.UERadioCapability;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (mme_ue) {
 ogs_assert(UERadioCapability);
 OGS_ASN_STORE_DATA(&mme_ue->ueRadioCapability, UERadioCapability);
 }
}
void s1ap_handle_initial_context_setup_response(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 int i, r, rv;
 char buf[OGS_ADDRSTRLEN];
S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
 S1AP_InitialContextSetupResponse_t *InitialContextSetupResponse = NULL;
S1AP_InitialContextSetupResponseIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_E_RABSetupListCtxtSURes_t *E_RABSetupListCtxtSURes = NULL;
mme_ue_t *mme_ue = NULL;
 enb_ue_t *enb_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 successfulOutcome = message->choice.successfulOutcome;
 ogs_assert(successfulOutcome);
 InitialContextSetupResponse =
 &successfulOutcome->value.choice.InitialContextSetupResponse;
 ogs_assert(InitialContextSetupResponse);
ogs_debug("InitialContextSetupResponse");
for (i = 0; i < InitialContextSetupResponse->protocolIEs.list.count; i++) {
 ie = InitialContextSetupResponse->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_E_RABSetupListCtxtSURes:
 E_RABSetupListCtxtSURes =
 &ie->value.choice.E_RABSetupListCtxtSURes;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
if (E_RABSetupListCtxtSURes) {
 int uli_presence = 0;
ogs_list_init(&mme_ue->bearer_to_modify_list);
for (i = 0; i < E_RABSetupListCtxtSURes->list.count; i++) {
 S1AP_E_RABSetupItemCtxtSUResIEs_t *item = NULL;
 S1AP_E_RABSetupItemCtxtSURes_t *e_rab = NULL;
mme_bearer_t *bearer = NULL;
item = (S1AP_E_RABSetupItemCtxtSUResIEs_t *)
 E_RABSetupListCtxtSURes->list.array[i];
 if (!item) {
 ogs_error("No S1AP_E_RABSetupItemCtxtSUResIEs_t");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
e_rab = &item->value.choice.E_RABSetupItemCtxtSURes;
 if (!e_rab) {
 ogs_error("No E_RABSetupItemCtxtSURes");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
bearer = mme_bearer_find_by_ue_ebi(mme_ue, e_rab->e_RAB_ID);
 if (!bearer) {
 ogs_error("No Bearer [%d]", (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_E_RAB_ID);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
memcpy(&bearer->enb_s1u_teid, e_rab->gTP_TEID.buf,
 sizeof(bearer->enb_s1u_teid));
 bearer->enb_s1u_teid = be32toh(bearer->enb_s1u_teid);
 rv = ogs_asn_BIT_STRING_to_ip(
 &e_rab->transportLayerAddress, &bearer->enb_s1u_ip);
 if (rv != OGS_OK) {
 ogs_error("No transportLayerAddress [%d]",
 (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" EBI[%d] ENB-S1U-TEID[%d]",
 bearer->ebi, bearer->enb_s1u_teid);
if (OGS_FSM_CHECK(&bearer->sm, esm_state_active)) {
 ogs_debug(" NAS_EPS Type[%d]", mme_ue->nas_eps.type);
 if (mme_ue->nas_eps.type != MME_EPS_TYPE_ATTACH_REQUEST) {
 ogs_debug(" ### ULI PRESENT ###");
 uli_presence = 1;
 }
 if (ogs_list_exists(
 &mme_ue->bearer_to_modify_list,
 &bearer->to_modify_node) == false)
 ogs_list_add(
 &mme_ue->bearer_to_modify_list,
 &bearer->to_modify_node);
 else
 ogs_warn("Bearer [%d] Duplicated", (int)e_rab->e_RAB_ID);
 }
 }
if (ogs_list_count(&mme_ue->bearer_to_modify_list)) {
 ogs_assert(OGS_OK ==
 mme_gtp_send_modify_bearer_request(mme_ue, uli_presence, 0));
 }
 }
if (MME_PAGING_ONGOING(mme_ue))
 mme_send_after_paging(mme_ue, false);
}
void s1ap_handle_initial_context_setup_failure(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_UnsuccessfulOutcome_t *unsuccessfulOutcome = NULL;
 S1AP_InitialContextSetupFailure_t *InitialContextSetupFailure = NULL;
S1AP_InitialContextSetupFailureIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_Cause_t *Cause = NULL;
mme_ue_t *mme_ue = NULL;
 enb_ue_t *enb_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 unsuccessfulOutcome = message->choice.unsuccessfulOutcome;
 ogs_assert(unsuccessfulOutcome);
 InitialContextSetupFailure =
 &unsuccessfulOutcome->value.choice.InitialContextSetupFailure;
 ogs_assert(InitialContextSetupFailure);
ogs_debug("InitialContextSetupFailure");
for (i = 0; i < InitialContextSetupFailure->protocolIEs.list.count; i++) {
 ie = InitialContextSetupFailure->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_Cause:
 Cause = &ie->value.choice.Cause;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
if (!Cause) {
 ogs_error("No Cause");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" Cause[Group:%d Cause:%d]",
 Cause->present, (int)Cause->choice.radioNetwork);
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
if (mme_ue) {
 /*
 * if T3450 is running, Attach complete will be sent.
 * So, we need to clear all the timer at this point.
 */
 CLEAR_SERVICE_INDICATOR(mme_ue);
 CLEAR_MME_UE_ALL_TIMERS(mme_ue);
 }
enb_ue->relcause.group = S1AP_Cause_PR_nas;
 enb_ue->relcause.cause = S1AP_CauseNas_normal_release;
/*
 * 19.2.2.3 in Spec 36.300
 *
 * In case of failure, eNB and MME behaviours are not mandated.
 *
 * Both implicit release (local release at each node) and
 * explicit release (MME-initiated UE Context Release procedure)
 * may in principle be adopted. The eNB should ensure
 * that no hanging resources remain at the eNB.
 */
 mme_send_release_access_bearer_or_ue_context_release(enb_ue);
}
void s1ap_handle_ue_context_modification_response(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
 S1AP_UEContextModificationResponse_t *UEContextModificationResponse = NULL;
S1AP_UEContextModificationResponseIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
mme_ue_t *mme_ue = NULL;
 enb_ue_t *enb_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 successfulOutcome = message->choice.successfulOutcome;
 ogs_assert(successfulOutcome);
 UEContextModificationResponse =
 &successfulOutcome->value.choice.UEContextModificationResponse;
 ogs_assert(UEContextModificationResponse);
ogs_debug("UEContextModificationResponse");
for (i = 0;
 i < UEContextModificationResponse->protocolIEs.list.count; i++) {
 ie = UEContextModificationResponse->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
CLEAR_SERVICE_INDICATOR(mme_ue);
}
void s1ap_handle_ue_context_modification_failure(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_UnsuccessfulOutcome_t *unsuccessfulOutcome = NULL;
 S1AP_UEContextModificationFailure_t *UEContextModificationFailure = NULL;
S1AP_UEContextModificationFailureIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_Cause_t *Cause = NULL;
enb_ue_t *enb_ue = NULL;
 mme_ue_t *mme_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 unsuccessfulOutcome = message->choice.unsuccessfulOutcome;
 ogs_assert(unsuccessfulOutcome);
 UEContextModificationFailure =
 &unsuccessfulOutcome->value.choice.UEContextModificationFailure;
 ogs_assert(UEContextModificationFailure);
ogs_warn("UEContextModificationFailure");
for (i = 0; i < UEContextModificationFailure->protocolIEs.list.count; i++) {
 ie = UEContextModificationFailure->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_Cause:
 Cause = &ie->value.choice.Cause;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
if (!Cause) {
 ogs_error("No Cause");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" Cause[Group:%d Cause:%d]",
 Cause->present, (int)Cause->choice.radioNetwork);
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
 CLEAR_SERVICE_INDICATOR(mme_ue);
}
void s1ap_handle_e_rab_setup_response(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 int i, r, rv;
 char buf[OGS_ADDRSTRLEN];
S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
 S1AP_E_RABSetupResponse_t *E_RABSetupResponse = NULL;
S1AP_E_RABSetupResponseIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_E_RABSetupListBearerSURes_t *E_RABSetupListBearerSURes = NULL;
 S1AP_E_RABList_t *E_RABFailedToSetupListBearerSURes = NULL;
 S1AP_CriticalityDiagnostics_t *CriticalityDiagnostics = NULL;
enb_ue_t *enb_ue = NULL;
 mme_ue_t *mme_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 successfulOutcome = message->choice.successfulOutcome;
 ogs_assert(successfulOutcome);
 E_RABSetupResponse = &successfulOutcome->value.choice.E_RABSetupResponse;
 ogs_assert(E_RABSetupResponse);
ogs_debug("E-RABSetupResponse");
for (i = 0; i < E_RABSetupResponse->protocolIEs.list.count; i++) {
 ie = E_RABSetupResponse->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_E_RABSetupListBearerSURes:
 E_RABSetupListBearerSURes =
 &ie->value.choice.E_RABSetupListBearerSURes;
 break;
 case S1AP_ProtocolIE_ID_id_E_RABFailedToSetupListBearerSURes:
 E_RABFailedToSetupListBearerSURes =
 &ie->value.choice.E_RABList;
 break;
 case S1AP_ProtocolIE_ID_id_CriticalityDiagnostics:
 CriticalityDiagnostics =
 &ie->value.choice.CriticalityDiagnostics;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
if (E_RABSetupListBearerSURes) {
 for (i = 0; i < E_RABSetupListBearerSURes->list.count; i++) {
 S1AP_E_RABSetupItemBearerSUResIEs_t *item = NULL;
 S1AP_E_RABSetupItemBearerSURes_t *e_rab = NULL;
mme_bearer_t *bearer = NULL;
item = (S1AP_E_RABSetupItemBearerSUResIEs_t *)
 E_RABSetupListBearerSURes->list.array[i];
 if (!item) {
 ogs_error("No S1AP_E_RABSetupItemBearerSUResIEs_t");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
e_rab = &item->value.choice.E_RABSetupItemBearerSURes;
 if (!e_rab) {
 ogs_error("No E_RABSetupItemBearerSURes");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
bearer = mme_bearer_find_by_ue_ebi(mme_ue, e_rab->e_RAB_ID);
 if (!bearer) {
 ogs_error("No Bearer [%d]", (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_E_RAB_ID);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
memcpy(&bearer->enb_s1u_teid, e_rab->gTP_TEID.buf,
 sizeof(bearer->enb_s1u_teid));
 bearer->enb_s1u_teid = be32toh(bearer->enb_s1u_teid);
 rv = ogs_asn_BIT_STRING_to_ip(
 &e_rab->transportLayerAddress, &bearer->enb_s1u_ip);
 if (rv != OGS_OK) {
 ogs_error("No transportLayerAddress [%d]",
 (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" EBI[%d]", bearer->ebi);
if (OGS_FSM_CHECK(&bearer->sm, esm_state_active)) {
 mme_bearer_t *linked_bearer = mme_linked_bearer(bearer);
 ogs_assert(linked_bearer);
 ogs_debug(" Linked-EBI[%d]", linked_bearer->ebi);
if (bearer->ebi == linked_bearer->ebi) {
 ogs_list_init(&mme_ue->bearer_to_modify_list);
 ogs_list_add(&mme_ue->bearer_to_modify_list,
 &bearer->to_modify_node);
 ogs_assert(OGS_OK ==
 mme_gtp_send_modify_bearer_request(mme_ue, 0, 0));
 } else {
 ogs_assert(OGS_OK ==
 mme_gtp_send_create_bearer_response(
 bearer, OGS_GTP2_CAUSE_REQUEST_ACCEPTED));
 }
 }
 }
 }
if (E_RABFailedToSetupListBearerSURes) {
 ogs_debug("E_RABFailedToSetupListBearerSURes");
 for (i = 0; i < E_RABFailedToSetupListBearerSURes->list.count; i++) {
 S1AP_E_RABItem_t *item = (S1AP_E_RABItem_t *)
 E_RABFailedToSetupListBearerSURes->list.array[i];
if (!item) {
 ogs_error("No S1AP_E_RABItem_t");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug("RAB_ID: %d", (int)item->e_RAB_ID);
 ogs_debug(" Cause[Group:%d Cause:%d]",
 (int)item->cause.present, (int)item->cause.choice.radioNetwork);
 }
 }
if (CriticalityDiagnostics) {
 ogs_debug("CriticalityDiagnostics");
 S1AP_ProcedureCode_t *procedureCode =
 CriticalityDiagnostics->procedureCode;
 S1AP_TriggeringMessage_t *triggeringMessage =
 CriticalityDiagnostics->triggeringMessage;
 S1AP_Criticality_t *procedureCriticality =
 CriticalityDiagnostics->procedureCriticality;
 if (procedureCode)
 ogs_debug("procedureCode: %lld", (long long)*procedureCode);
 if (triggeringMessage)
 ogs_debug("triggeringMessage: %lld", (long long)*triggeringMessage);
 if (procedureCriticality)
 ogs_debug("procedureCriticality: %lld",
 (long long)*procedureCriticality);
 }
}
void s1ap_handle_ue_context_release_request(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_UEContextReleaseRequest_t *UEContextReleaseRequest = NULL;
S1AP_UEContextReleaseRequest_IEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_Cause_t *Cause = NULL;
enb_ue_t *enb_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 UEContextReleaseRequest =
 &initiatingMessage->value.choice.UEContextReleaseRequest;
 ogs_assert(UEContextReleaseRequest);
ogs_debug("UEContextReleaseRequest");
for (i = 0; i < UEContextReleaseRequest->protocolIEs.list.count; i++) {
 ie = UEContextReleaseRequest->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_Cause:
 Cause = &ie->value.choice.Cause;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_warn("No ENB UE Context : MME_UE_S1AP_ID[%d]",
 (int)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb,
 MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
if (!Cause) {
 ogs_error("No Cause");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" Cause[Group:%d Cause:%d]",
 Cause->present, (int)Cause->choice.radioNetwork);
switch (Cause->present) {
 case S1AP_Cause_PR_radioNetwork:
 case S1AP_Cause_PR_transport:
 case S1AP_Cause_PR_protocol:
 case S1AP_Cause_PR_misc:
 break;
 case S1AP_Cause_PR_nas:
 ogs_warn("NAS-Cause[%d]", (int)Cause->choice.nas);
 break;
 default:
 ogs_warn("Invalid cause group[%d]", Cause->present);
 break;
 }
enb_ue->relcause.group = Cause->present;
 enb_ue->relcause.cause = (int)Cause->choice.radioNetwork;
 mme_send_release_access_bearer_or_ue_context_release(enb_ue);
}
void s1ap_handle_ue_context_release_complete(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
 S1AP_UEContextReleaseComplete_t *UEContextReleaseComplete = NULL;
S1AP_UEContextReleaseComplete_IEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
enb_ue_t *enb_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 successfulOutcome = message->choice.successfulOutcome;
 ogs_assert(successfulOutcome);
 UEContextReleaseComplete =
 &successfulOutcome->value.choice.UEContextReleaseComplete;
 ogs_assert(UEContextReleaseComplete);
ogs_debug("UEContextReleaseComplete");
for (i = 0; i < UEContextReleaseComplete->protocolIEs.list.count; i++) {
 ie = UEContextReleaseComplete->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_warn("No ENB UE Context : MME_UE_S1AP_ID[%d]",
 (int)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb,
 MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
s1ap_handle_ue_context_release_action(enb_ue);
}
void s1ap_handle_ue_context_release_action(enb_ue_t *enb_ue)
{
 int r;
 mme_ue_t *mme_ue = NULL;
if (!enb_ue) {
 ogs_error("S1 context has already been removed");
 return;
 }
ogs_info("UE Context Release [Action:%d]", enb_ue->ue_ctx_rel_action);
 ogs_info(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (mme_ue) {
 ogs_info(" IMSI[%s]", mme_ue->imsi_bcd);
/*
 * An assert occurs when a NAS message retransmission occurs.
 *
 * Because there is no `enb_ue` context.
 *
 * Therefore, before removing enb_ue, all Timers must be stopped
 * to prevent retransmission of NAS messages.
 */
 CLEAR_MME_UE_ALL_TIMERS(mme_ue);
if (OGS_FSM_CHECK(&mme_ue->sm, emm_state_registered)) {
 ogs_debug("Mobile Reachable timer started for IMSI[%s]",
 mme_ue->imsi_bcd);
 /*
 * TS 24.301
 * Section 5.3.5
 * Handling of the periodic tracking area update timer and
 * mobile reachable timer (S1 mode only)
 *
 * The periodic tracking area updating procedure is used to
 * periodically notify the availability of the UE to the network.
 * The procedure is controlled in the UE by timer T3412.
 * The value of timer T3412 is sent by the network to the UE
 * in the ATTACH ACCEPT message and can be sent in the TRACKING AREA
 * UPDATE ACCEPT message. The UE shall apply this value in all tracking
 * areas of the list of tracking areas assigned to the UE
 * until a new value is received.
 *
 * If timer T3412 received by the UE in an ATTACH ACCEPT or TRACKING
 * AREA UPDATE ACCEPT message contains an indication that the timer is
 * deactivated or the timer value is zero, then timer T3412 is
 * deactivated and the UE shall not perform the periodic tracking area
 * updating procedure.
 *
 * Timer T3412 is reset and started with its initial value,
 * when the UE changes from EMM-CONNECTED to EMM-IDLE mode.
 *
 * Timer T3412 is stopped when the UE enters EMM-CONNECTED mode or
 * the EMM-DEREGISTERED state. If the UE is attached for emergency
 * bearer services, and timer T3412 expires, the UE shall not initiate
 * a periodic tracking area updating procedure, but shall locally detach
 * from the network. When the UE is camping on a suitable cell, it may
 * re-attach to regain normal service.
 *
 * When a UE is not attached for emergency bearer services, and timer
 * T3412 expires, the periodic tracking area updating procedure shall
 * be started and the timer shall be set to its initial value
 * for the next start.
 *
 * If the UE is not attached for emergency bearer services, the mobile
 * reachable timer shall be longer than T3412. In this case, by default,
 * the mobile reachable timer is 4 minutes greater than timer T3412.
 *
 * Upon expiry of the mobile reachable timer the network shall start
 * the implicit detach timer. The value of the implicit detach timer is
 * network dependent. If ISR is activated, the default value of
 * the implicit detach timer is 4 minutes greater than timer T3423.
 * If the implicit detach timer expires before the UE contacts
 * the network, the network shall implicitly detach the UE. If the MME
 * includes timer T3346 in the TRACKING AREA UPDATE REJECT message or
 * the SERVICE REJECT message and timer T3346 is greater than timer
 * T3412, the MME sets the mobile reachable timer and the implicit
 * detach timer such that the sum of the timer values is greater than
 * timer T3346.
 */
 ogs_timer_start(mme_ue->t_mobile_reachable.timer,
 ogs_time_from_sec(mme_self()->time.t3412.value + 240));
 }
 }
switch (enb_ue->ue_ctx_rel_action) {
 case S1AP_UE_CTX_REL_S1_CONTEXT_REMOVE:
 ogs_debug(" Action: S1 context remove");
 enb_ue_remove(enb_ue);
 break;
 case S1AP_UE_CTX_REL_S1_REMOVE_AND_UNLINK:
 ogs_debug(" Action: S1 normal release");
 enb_ue_remove(enb_ue);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
 enb_ue_unlink(mme_ue);
 break;
 case S1AP_UE_CTX_REL_UE_CONTEXT_REMOVE:
 ogs_debug(" Action: UE context remove");
 enb_ue_remove(enb_ue);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
mme_ue_remove(mme_ue);
 break;
 case S1AP_UE_CTX_REL_S1_HANDOVER_COMPLETE:
 ogs_debug(" Action: S1 handover complete");
enb_ue_source_deassociate_target(enb_ue);
 enb_ue_remove(enb_ue);
if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
 if (mme_ue_have_indirect_tunnel(mme_ue) == true) {
 ogs_assert(OGS_OK ==
 mme_gtp_send_delete_indirect_data_forwarding_tunnel_request(
 mme_ue, OGS_GTP_DELETE_INDIRECT_HANDOVER_COMPLETE));
 } else {
 ogs_warn("Check your eNodeB");
 ogs_warn(" No INDIRECT TUNNEL");
 ogs_warn(" Packet could be dropped during S1-Handover");
 mme_ue_clear_indirect_tunnel(mme_ue);
 }
 break;
 case S1AP_UE_CTX_REL_S1_HANDOVER_CANCEL:
 ogs_warn(" Action: S1 handover cancel");
enb_ue_source_deassociate_target(enb_ue);
 enb_ue_remove(enb_ue);
if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
 if (mme_ue_have_indirect_tunnel(mme_ue) == true) {
 ogs_assert(OGS_OK ==
 mme_gtp_send_delete_indirect_data_forwarding_tunnel_request(
 mme_ue, OGS_GTP_DELETE_INDIRECT_HANDOVER_CANCEL));
 } else {
 ogs_warn("Check your eNodeB");
 ogs_warn(" No INDIRECT TUNNEL");
 ogs_warn(" Packet could be dropped during S1-Handover");
 mme_ue_clear_indirect_tunnel(mme_ue);
enb_ue = enb_ue_find_by_id(mme_ue->enb_ue_id);
 if (!enb_ue) {
 ogs_error("No S1 context");
 return;
 }
 r = s1ap_send_handover_cancel_ack(enb_ue);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 }
 break;
 case S1AP_UE_CTX_REL_S1_HANDOVER_FAILURE:
 ogs_warn(" Action: S1 handover failure");
enb_ue_source_deassociate_target(enb_ue);
 enb_ue_remove(enb_ue);
if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
 if (mme_ue_have_indirect_tunnel(mme_ue) == true) {
 ogs_error("Check your eNodeB");
 ogs_error(" We found INDIRECT TUNNEL in HandoverFailure");
 mme_ue_clear_indirect_tunnel(mme_ue);
 }
 break;
 case S1AP_UE_CTX_REL_S1_PAGING:
 ogs_debug(" Action: S1 paging");
 enb_ue_remove(enb_ue);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
 enb_ue_unlink(mme_ue);
r = s1ap_send_paging(mme_ue, S1AP_CNDomain_ps);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 break;
 default:
 ogs_error("Invalid Action[%d]", enb_ue->ue_ctx_rel_action);
 break;
 }
}
void s1ap_handle_e_rab_modification_indication(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r, rv;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_E_RABModificationIndication_t *E_RABModificationIndication = NULL;
S1AP_E_RABModificationIndicationIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_E_RABToBeModifiedListBearerModInd_t
 *E_RABToBeModifiedListBearerModInd = NULL;
enb_ue_t *enb_ue = NULL;
 mme_ue_t *mme_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 E_RABModificationIndication = &initiatingMessage->value.choice.E_RABModificationIndication;
 ogs_assert(E_RABModificationIndication);
ogs_info("E_RABModificationIndication");
for (i = 0; i < E_RABModificationIndication->protocolIEs.list.count; i++) {
 ie = E_RABModificationIndication->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_E_RABToBeModifiedListBearerModInd:
 E_RABToBeModifiedListBearerModInd =
 &ie->value.choice.E_RABToBeModifiedListBearerModInd;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_warn("No ENB UE Context : MME_UE_S1AP_ID[%d]",
 (int)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb,
 MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
if (!E_RABToBeModifiedListBearerModInd) {
 ogs_error("No E_RABToBeModifiedListBearerModInd");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
ogs_list_init(&mme_ue->bearer_to_modify_list);
for (i = 0; i < E_RABToBeModifiedListBearerModInd->list.count; i++) {
 S1AP_E_RABToBeModifiedItemBearerModIndIEs_t *item = NULL;
 S1AP_E_RABToBeModifiedItemBearerModInd_t *e_rab = NULL;
mme_bearer_t *bearer = NULL;
item = (S1AP_E_RABToBeModifiedItemBearerModIndIEs_t *)
 E_RABToBeModifiedListBearerModInd->list.array[i];
 if (!item) {
 ogs_error("No S1AP_E_RABToBeModifiedItemBearerModIndIEs_t");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
e_rab = &item->value.choice.E_RABToBeModifiedItemBearerModInd;
 if (!e_rab) {
 ogs_error("No E_RABToBeModifiedItemBearerModInd");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
bearer = mme_bearer_find_by_ue_ebi(mme_ue, e_rab->e_RAB_ID);
 if (!bearer) {
 ogs_error("No Bearer [%d]", (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_E_RAB_ID);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
memcpy(&bearer->enb_s1u_teid, e_rab->dL_GTP_TEID.buf,
 sizeof(bearer->enb_s1u_teid));
 bearer->enb_s1u_teid = be32toh(bearer->enb_s1u_teid);
 rv = ogs_asn_BIT_STRING_to_ip(
 &e_rab->transportLayerAddress, &bearer->enb_s1u_ip);
 if (rv != OGS_OK) {
 ogs_error("No transportLayerAddress [%d]",
 (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (ogs_list_exists(
 &mme_ue->bearer_to_modify_list,
 &bearer->to_modify_node) == false)
 ogs_list_add(
 &mme_ue->bearer_to_modify_list, &bearer->to_modify_node);
 else
 ogs_warn("Bearer [%d] Duplicated", (int)e_rab->e_RAB_ID);
 }
if (ogs_list_count(&mme_ue->bearer_to_modify_list)) {
 ogs_assert(OGS_OK == mme_gtp_send_modify_bearer_request(
 mme_ue, 0, OGS_GTP_MODIFY_IN_E_RAB_MODIFICATION));
 }
}
void s1ap_handle_enb_direct_information_transfer(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_ENBDirectInformationTransfer_t *ENBDirectInformationTransfer = NULL;
S1AP_ENBDirectInformationTransferIEs_t *ie = NULL;
 S1AP_Inter_SystemInformationTransferType_t *Inter_SystemInformationTransferType = NULL;
S1AP_RIMTransfer_t *RIMTransfer = NULL;
 S1AP_RIMInformation_t *RIMInformation = NULL;
 S1AP_RIMRoutingAddress_t *RIMRoutingAddress = NULL;
 struct S1AP_GERAN_Cell_ID *geran_cell_id = NULL;
 ogs_plmn_id_t plmn_id;
 ogs_nas_rai_t rai;
 uint16_t cell_id;
 unsigned int i;
 mme_sgsn_t *sgsn = NULL;
ogs_assert(enb);
 ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 ENBDirectInformationTransfer = &initiatingMessage->value.choice.ENBDirectInformationTransfer;
 ogs_assert(ENBDirectInformationTransfer);
ogs_info("Rx eNB DIRECT INFORMATION TRANSFER");
for (i = 0; i < ENBDirectInformationTransfer->protocolIEs.list.count; i++) {
 ie = ENBDirectInformationTransfer->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_Inter_SystemInformationTransferTypeEDT:
 Inter_SystemInformationTransferType = &ie->value.choice.Inter_SystemInformationTransferType;
 break;
 default:
 break;
 }
 }
RIMTransfer = Inter_SystemInformationTransferType->choice.rIMTransfer;
RIMInformation = &RIMTransfer->rIMInformation;
 RIMRoutingAddress = RIMTransfer->rIMRoutingAddress; /* optional */
if (!RIMRoutingAddress) {
 ogs_warn("Rx eNB DIRECT INFORMATION TRANSFER without RIM Routing Address IE!");
 goto forward_to_default_sgsn;
 }
switch (RIMRoutingAddress->present) {
 case S1AP_RIMRoutingAddress_PR_gERAN_Cell_ID:
 geran_cell_id = RIMRoutingAddress->choice.gERAN_Cell_ID;
 ogs_assert(geran_cell_id);
 memcpy(&plmn_id, geran_cell_id->lAI.pLMNidentity.buf, sizeof(plmn_id));
 ogs_nas_from_plmn_id(&rai.lai.nas_plmn_id, &plmn_id);
 memcpy(&rai.lai.lac, geran_cell_id->lAI.lAC.buf, sizeof(uint16_t));
 rai.lai.lac = be16toh(rai.lai.lac);
 rai.rac = *geran_cell_id->rAC.buf;
 memcpy(&cell_id, geran_cell_id->cI.buf, sizeof(uint16_t));
 cell_id = be16toh(cell_id);
 ogs_info(" RAI[MCC:%u MNC:%u LAC:%u RAC:%u] CI[%u]",
 ogs_plmn_id_mcc(&plmn_id), ogs_plmn_id_mnc(&plmn_id),
 rai.lai.lac, rai.rac, cell_id);
 sgsn = mme_sgsn_find_by_routing_address(&rai, cell_id);
 if (sgsn) {
 mme_gtp1_send_ran_information_relay(
 sgsn, RIMInformation->buf, RIMInformation->size,
 &rai, cell_id);
 } else {
 ogs_warn("No SGSN to forward RIM message! RAI[MCC:%u MNC:%u LAC:%u RAC:%u] CI[%u]",
 ogs_plmn_id_mcc(&plmn_id), ogs_plmn_id_mnc(&plmn_id),
 rai.lai.lac, rai.rac, cell_id);
 }
 break;
 case S1AP_RIMRoutingAddress_PR_targetRNC_ID:
 ogs_warn("Rx empty RIM Routing Address 'RNC_ID' not implemented!");
 break;
 case S1AP_RIMRoutingAddress_PR_eHRPD_Sector_ID:
 ogs_warn("Rx empty RIM Routing Address 'eHRPD_Sector_ID' not implemented!");
 break;
 case S1AP_RIMRoutingAddress_PR_NOTHING:
 ogs_warn("Rx empty RIM Routing Address!");
 goto forward_to_default_sgsn;
 default:
 ogs_warn("Rx unknown RIM Routing Address type %u!", RIMRoutingAddress->present);
 break;
 }
return;
forward_to_default_sgsn:
 sgsn = mme_sgsn_find_by_default_routing_address();
 if (!sgsn)
 return;
 mme_gtp1_send_ran_information_relay(
 sgsn, RIMInformation->buf, RIMInformation->size,
 NULL, 0);
}
void s1ap_handle_path_switch_request(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 int i, r, rv;
 char buf[OGS_ADDRSTRLEN];
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_PathSwitchRequest_t *PathSwitchRequest = NULL;
S1AP_PathSwitchRequestIEs_t *ie = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_E_RABToBeSwitchedDLList_t *E_RABToBeSwitchedDLList = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_EUTRAN_CGI_t *EUTRAN_CGI = NULL;
 S1AP_TAI_t *TAI = NULL;
 S1AP_UESecurityCapabilities_t *UESecurityCapabilities = NULL;
S1AP_PLMNidentity_t *pLMNidentity = NULL;
 S1AP_CellIdentity_t *cell_ID = NULL;
 S1AP_TAC_t *tAC = NULL;
 S1AP_EncryptionAlgorithms_t *encryptionAlgorithms = NULL;
 S1AP_IntegrityProtectionAlgorithms_t *integrityProtectionAlgorithms = NULL;
 uint16_t eea = 0, eia = 0;
 uint8_t eea0 = 0, eia0 = 0;
enb_ue_t *enb_ue = NULL;
 mme_ue_t *mme_ue = NULL;
 ogs_pkbuf_t *s1apbuf = NULL;
ogs_eps_tai_t tai;
 int served_tai_index = 0;
sgw_relocation_e relocation;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 PathSwitchRequest = &initiatingMessage->value.choice.PathSwitchRequest;
 ogs_assert(PathSwitchRequest);
ogs_info("PathSwitchRequest");
for (i = 0; i < PathSwitchRequest->protocolIEs.list.count; i++) {
 ie = PathSwitchRequest->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_E_RABToBeSwitchedDLList:
 E_RABToBeSwitchedDLList =
 &ie->value.choice.E_RABToBeSwitchedDLList;
 break;
 case S1AP_ProtocolIE_ID_id_SourceMME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_EUTRAN_CGI:
 EUTRAN_CGI = &ie->value.choice.EUTRAN_CGI;
 break;
 case S1AP_ProtocolIE_ID_id_TAI:
 TAI = &ie->value.choice.TAI;
 break;
 case S1AP_ProtocolIE_ID_id_UESecurityCapabilities:
 UESecurityCapabilities = &ie->value.choice.UESecurityCapabilities;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 enb_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!enb_ue) {
 ogs_error("Cannot find UE from sourceMME-UE-S1AP-ID[%d] and eNB[%s:%d]",
 (int)*MME_UE_S1AP_ID,
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
s1apbuf = s1ap_build_path_switch_failure(
 *ENB_UE_S1AP_ID, *MME_UE_S1AP_ID,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 if (!s1apbuf) {
 ogs_error("s1ap_build_path_switch_failure() failed");
 return;
 }
r = s1ap_send_to_enb(enb, s1apbuf, S1AP_NON_UE_SIGNALLING);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_info(" OLD ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
if (!EUTRAN_CGI) {
 ogs_error("No EUTRAN_CGI");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
pLMNidentity = &EUTRAN_CGI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 cell_ID = &EUTRAN_CGI->cell_ID;
 ogs_assert(cell_ID);
if (!TAI) {
 ogs_error("No TAI");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
pLMNidentity = &TAI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 tAC = &TAI->tAC;
 ogs_assert(tAC && tAC->size == sizeof(uint16_t));
memcpy(&tai.plmn_id, pLMNidentity->buf, sizeof(tai.plmn_id));
 memcpy(&tai.tac, tAC->buf, sizeof(tai.tac));
 tai.tac = be16toh(tai.tac);
/* Check TAI */
 served_tai_index = mme_find_served_tai(&tai);
 if (served_tai_index < 0) {
 ogs_error("Cannot find Served TAI[PLMN_ID:%06x,TAC:%d]",
 ogs_plmn_id_hexdump(&tai.plmn_id), tai.tac);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_message_not_compatible_with_receiver_state);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 ogs_debug(" SERVED_TAI_INDEX[%d]", served_tai_index);
if (!E_RABToBeSwitchedDLList) {
 ogs_error("No E_RABToBeSwitchedDLList");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
if (!SECURITY_CONTEXT_IS_VALID(mme_ue)) {
 ogs_error("No Security Context");
 s1apbuf = s1ap_build_path_switch_failure(
 *ENB_UE_S1AP_ID, *MME_UE_S1AP_ID,
 S1AP_Cause_PR_nas, S1AP_CauseNas_authentication_failure);
 if (!s1apbuf) {
 ogs_error("s1ap_build_path_switch_failure() failed");
 return;
 }
r = s1ap_send_to_enb_ue(enb_ue, s1apbuf);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_info(" OLD TAI[PLMN_ID:%06x,TAC:%d]",
 ogs_plmn_id_hexdump(&mme_ue->tai.plmn_id),
 mme_ue->tai.tac);
 ogs_info(" OLD E_CGI[PLMN_ID:%06x,CELL_ID:0x%x]",
 ogs_plmn_id_hexdump(&mme_ue->e_cgi.plmn_id),
 mme_ue->e_cgi.cell_id);
/* Update ENB-UE-S1AP-ID */
 enb_ue->enb_ue_s1ap_id = *ENB_UE_S1AP_ID;
/* Change enb_ue to the NEW eNB */
 enb_ue_switch_to_enb(enb_ue, enb);
ogs_info(" NEW ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
memcpy(&enb_ue->saved.tai.plmn_id, pLMNidentity->buf,
 sizeof(enb_ue->saved.tai.plmn_id));
 memcpy(&enb_ue->saved.tai.tac, tAC->buf, sizeof(enb_ue->saved.tai.tac));
 enb_ue->saved.tai.tac = be16toh(enb_ue->saved.tai.tac);
memcpy(&enb_ue->saved.e_cgi.plmn_id, pLMNidentity->buf,
 sizeof(enb_ue->saved.e_cgi.plmn_id));
 memcpy(&enb_ue->saved.e_cgi.cell_id, cell_ID->buf,
 sizeof(enb_ue->saved.e_cgi.cell_id));
 enb_ue->saved.e_cgi.cell_id = (be32toh(enb_ue->saved.e_cgi.cell_id) >> 4);
ogs_info(" TAI[PLMN_ID:%06x,TAC:%d]",
 ogs_plmn_id_hexdump(&enb_ue->saved.tai.plmn_id),
 enb_ue->saved.tai.tac);
 ogs_info(" E_CGI[PLMN_ID:%06x,CELL_ID:0x%x]",
 ogs_plmn_id_hexdump(&enb_ue->saved.e_cgi.plmn_id),
 enb_ue->saved.e_cgi.cell_id);
/* Copy Stream-No/TAI/ECGI from enb_ue */
 mme_ue->enb_ostream_id = enb_ue->enb_ostream_id;
 memcpy(&mme_ue->tai, &enb_ue->saved.tai, sizeof(ogs_eps_tai_t));
 memcpy(&mme_ue->e_cgi, &enb_ue->saved.e_cgi, sizeof(ogs_e_cgi_t));
 mme_ue->ue_location_timestamp = ogs_time_now();
ogs_assert(UESecurityCapabilities);
 encryptionAlgorithms =
 &UESecurityCapabilities->encryptionAlgorithms;
 integrityProtectionAlgorithms =
 &UESecurityCapabilities->integrityProtectionAlgorithms;
memcpy(&eea, encryptionAlgorithms->buf, sizeof(eea));
 eea = be16toh(eea);
 eea0 = mme_ue->ue_network_capability.eea0;
 mme_ue->ue_network_capability.eea = eea >> 9;
 mme_ue->ue_network_capability.eea0 = eea0;
memcpy(&eia, integrityProtectionAlgorithms->buf, sizeof(eia));
 eia = be16toh(eia);
 eia0 = mme_ue->ue_network_capability.eia0;
 mme_ue->ue_network_capability.eia = eia >> 9;
 mme_ue->ue_network_capability.eia0 = eia0;
/* Update Security Context (NextHop) */
 mme_ue->nhcc++;
 ogs_kdf_nh_enb(mme_ue->kasme, mme_ue->nh, mme_ue->nh);
ogs_list_init(&mme_ue->bearer_to_modify_list);
for (i = 0; i < E_RABToBeSwitchedDLList->list.count; i++) {
 S1AP_E_RABToBeSwitchedDLItemIEs_t *item = NULL;
 S1AP_E_RABToBeSwitchedDLItem_t *e_rab = NULL;
mme_bearer_t *bearer = NULL;
item = (S1AP_E_RABToBeSwitchedDLItemIEs_t *)
 E_RABToBeSwitchedDLList->list.array[i];
 if (!item) {
 ogs_error("No S1AP_E_RABToBeSwitchedDLItemIEs_t");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
e_rab = &item->value.choice.E_RABToBeSwitchedDLItem;
 if (!e_rab) {
 ogs_error("No E_RABToBeSwitchedDLItem");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
bearer = mme_bearer_find_by_ue_ebi(mme_ue, e_rab->e_RAB_ID);
 if (!bearer) {
 ogs_error("No Bearer [%d]", (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_E_RAB_ID);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
memcpy(&bearer->enb_s1u_teid, e_rab->gTP_TEID.buf,
 sizeof(bearer->enb_s1u_teid));
 bearer->enb_s1u_teid = be32toh(bearer->enb_s1u_teid);
 rv = ogs_asn_BIT_STRING_to_ip(
 &e_rab->transportLayerAddress, &bearer->enb_s1u_ip);
 if (rv != OGS_OK) {
 ogs_error("No transportLayerAddress [%d]",
 (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (ogs_list_exists(
 &mme_ue->bearer_to_modify_list,
 &bearer->to_modify_node) == false)
 ogs_list_add(
 &mme_ue->bearer_to_modify_list, &bearer->to_modify_node);
 else
 ogs_warn("Bearer [%d] Duplicated", (int)e_rab->e_RAB_ID);
 }
relocation = sgw_ue_check_if_relocated(mme_ue);
 if (relocation == SGW_WITHOUT_RELOCATION) {
 if (ogs_list_count(&mme_ue->bearer_to_modify_list)) {
 ogs_assert(OGS_OK == mme_gtp_send_modify_bearer_request(
 mme_ue, 1, OGS_GTP_MODIFY_IN_PATH_SWITCH_REQUEST));
 }
 } else if (relocation == SGW_WITH_RELOCATION) {
 mme_sess_t *sess = NULL;
ogs_list_for_each(&mme_ue->sess_list, sess) {
 GTP_COUNTER_INCREMENT(
 mme_ue, GTP_COUNTER_CREATE_SESSION_BY_PATH_SWITCH);
ogs_assert(OGS_OK ==
 mme_gtp_send_create_session_request(
 sess, OGS_GTP_CREATE_IN_PATH_SWITCH_REQUEST));
 }
 } else if (relocation == SGW_HAS_ALREADY_BEEN_RELOCATED) {
 ogs_error("SGW has already been relocated");
 }
}
void s1ap_handle_enb_configuration_transfer(
 mme_enb_t *enb, ogs_s1ap_message_t *message, ogs_pkbuf_t *pkbuf)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_ENBConfigurationTransfer_t *ENBConfigurationTransfer = NULL;
S1AP_ENBConfigurationTransferIEs_t *ie = NULL;
 S1AP_SONConfigurationTransfer_t *SONConfigurationTransfer = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 ENBConfigurationTransfer =
 &initiatingMessage->value.choice.ENBConfigurationTransfer;
 ogs_assert(ENBConfigurationTransfer);
ogs_debug("ENBConfigurationTransfer");
 for (i = 0; i < ENBConfigurationTransfer->protocolIEs.list.count; i++) {
 ie = ENBConfigurationTransfer->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_SONConfigurationTransferECT:
 SONConfigurationTransfer =
 &ie->value.choice.SONConfigurationTransfer;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (SONConfigurationTransfer) {
 S1AP_TargeteNB_ID_t *targeteNB_ID =
 &SONConfigurationTransfer->targeteNB_ID;
 S1AP_SourceeNB_ID_t *sourceeNB_ID =
 &SONConfigurationTransfer->sourceeNB_ID;
mme_enb_t *target_enb = NULL;
 uint32_t source_enb_id, target_enb_id;
 uint16_t source_tac, target_tac;
ogs_s1ap_ENB_ID_to_uint32(
 &sourceeNB_ID->global_ENB_ID.eNB_ID, &source_enb_id);
 ogs_s1ap_ENB_ID_to_uint32(
 &targeteNB_ID->global_ENB_ID.eNB_ID, &target_enb_id);
memcpy(&source_tac, sourceeNB_ID->selected_TAI.tAC.buf,
 sizeof(source_tac));
 source_tac = be16toh(source_tac);
 memcpy(&target_tac, targeteNB_ID->selected_TAI.tAC.buf,
 sizeof(target_tac));
 target_tac = be16toh(target_tac);
ogs_debug(" Source : ENB_ID[%s:%d], TAC[%d]",
 sourceeNB_ID->global_ENB_ID.eNB_ID.present ==
 S1AP_ENB_ID_PR_homeENB_ID ? "Home" :
 sourceeNB_ID->global_ENB_ID.eNB_ID.present ==
 S1AP_ENB_ID_PR_macroENB_ID ? "Macro" : "Others",
 source_enb_id, source_tac);
 ogs_debug(" Target : ENB_ID[%s:%d], TAC[%d]",
 targeteNB_ID->global_ENB_ID.eNB_ID.present ==
 S1AP_ENB_ID_PR_homeENB_ID ? "Home" :
 targeteNB_ID->global_ENB_ID.eNB_ID.present ==
 S1AP_ENB_ID_PR_macroENB_ID ? "Macro" : "Others",
 target_enb_id, target_tac);
target_enb = mme_enb_find_by_enb_id(target_enb_id);
 if (target_enb == NULL) {
 ogs_error("eNB configuration transfer : "
 "cannot find target eNB-id[0x%x]", target_enb_id);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_targetID);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
r = s1ap_send_mme_configuration_transfer(
 target_enb, SONConfigurationTransfer);
 ogs_expect(r == OGS_OK);
 /* ogs_asn_copy_ie() could be failed from received packet.
 * So we should not use ogs_assert(r != OGS_ERROR).*/
 }
}
static void s1ap_handle_handover_required_intralte(enb_ue_t *source_ue,
 S1AP_Cause_t *Cause, S1AP_TargetID_t *TargetID,
 S1AP_Source_ToTarget_TransparentContainer_t *Source_ToTarget_TransparentContainer)
{
 mme_enb_t *target_enb = NULL;
 uint32_t target_enb_id = 0;
 mme_ue_t *mme_ue = NULL;
 int r;
ogs_assert(source_ue);
 ogs_assert(Cause);
 ogs_assert(TargetID);
 ogs_assert(Source_ToTarget_TransparentContainer);
switch (TargetID->present) {
 case S1AP_TargetID_PR_targeteNB_ID:
 ogs_s1ap_ENB_ID_to_uint32(
 &TargetID->choice.targeteNB_ID->global_ENB_ID.eNB_ID,
 &target_enb_id);
 break;
 default:
 ogs_error("Not implemented(%d)", TargetID->present);
 r = s1ap_send_handover_preparation_failure(source_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
target_enb = mme_enb_find_by_enb_id(target_enb_id);
 if (target_enb == NULL) {
 ogs_error("Handover required : cannot find target eNB-id[0x%x]",
 target_enb_id);
 r = s1ap_send_handover_preparation_failure(source_ue,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_targetID);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
mme_ue = mme_ue_find_by_id(source_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
if (!SECURITY_CONTEXT_IS_VALID(mme_ue)) {
 ogs_error("No Security Context");
 r = s1ap_send_handover_preparation_failure(source_ue,
 S1AP_Cause_PR_nas, S1AP_CauseNas_authentication_failure);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
source_ue->handover_type = S1AP_HandoverType_intralte;
mme_ue->nhcc++;
 ogs_kdf_nh_enb(mme_ue->kasme, mme_ue->nh, mme_ue->nh);
r = s1ap_send_handover_request(
 source_ue, target_enb, &source_ue->handover_type, Cause,
 Source_ToTarget_TransparentContainer);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
}
void s1ap_handle_handover_required(mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_HandoverRequired_t *HandoverRequired = NULL;
S1AP_HandoverRequiredIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_HandoverType_t *HandoverType = NULL;
 S1AP_Cause_t *Cause = NULL;
 S1AP_TargetID_t *TargetID = NULL;
 S1AP_Source_ToTarget_TransparentContainer_t
 *Source_ToTarget_TransparentContainer = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 HandoverRequired = &initiatingMessage->value.choice.HandoverRequired;
 ogs_assert(HandoverRequired);
enb_ue_t *source_ue = NULL;
ogs_debug("HandoverRequired");
 for (i = 0; i < HandoverRequired->protocolIEs.list.count; i++) {
 ie = HandoverRequired->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_HandoverType:
 HandoverType = &ie->value.choice.HandoverType;
 break;
 case S1AP_ProtocolIE_ID_id_Cause:
 Cause = &ie->value.choice.Cause;
 break;
 case S1AP_ProtocolIE_ID_id_TargetID:
 TargetID = &ie->value.choice.TargetID;
 break;
 case S1AP_ProtocolIE_ID_id_Source_ToTarget_TransparentContainer:
 Source_ToTarget_TransparentContainer =
 &ie->value.choice.Source_ToTarget_TransparentContainer;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
source_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!source_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" Source : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 source_ue->enb_ue_s1ap_id, source_ue->mme_ue_s1ap_id);
if (!HandoverType) {
 ogs_error("No HandoverType");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!Cause) {
 ogs_error("No Cause");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!TargetID) {
 ogs_error("No TargetID");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!Source_ToTarget_TransparentContainer) {
 ogs_error("No Source_ToTarget_TransparentContainer");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
switch (*HandoverType) {
 case S1AP_HandoverType_intralte:
 s1ap_handle_handover_required_intralte(source_ue, Cause, TargetID, Source_ToTarget_TransparentContainer);
 break;
 case S1AP_HandoverType_ltetoutran:
 case S1AP_HandoverType_ltetogeran:
 case S1AP_HandoverType_utrantolte:
 case S1AP_HandoverType_gerantolte:
 case S1AP_HandoverType_eps_to_5gs:
 case S1AP_HandoverType_fivegs_to_eps:
 default: /* Enumeration is extensible */
 ogs_error("Rx Handover Required HandoverType=%ld not implemented!", *HandoverType);
 r = s1ap_send_handover_preparation_failure(source_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 break;
 }
}
void s1ap_handle_handover_request_ack(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 int i, r, rv;
 char buf[OGS_ADDRSTRLEN];
S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
 S1AP_HandoverRequestAcknowledge_t *HandoverRequestAcknowledge = NULL;
S1AP_HandoverRequestAcknowledgeIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_E_RABAdmittedList_t *E_RABAdmittedList = NULL;
 S1AP_Target_ToSource_TransparentContainer_t
 *Target_ToSource_TransparentContainer = NULL;
enb_ue_t *source_ue = NULL;
 enb_ue_t *target_ue = NULL;
 mme_ue_t *mme_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 successfulOutcome = message->choice.successfulOutcome;
 ogs_assert(successfulOutcome);
 HandoverRequestAcknowledge =
 &successfulOutcome->value.choice.HandoverRequestAcknowledge;
 ogs_assert(HandoverRequestAcknowledge);
ogs_debug("HandoverRequestAcknowledge");
 for (i = 0; i < HandoverRequestAcknowledge->protocolIEs.list.count; i++) {
 ie = HandoverRequestAcknowledge->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_E_RABAdmittedList:
 E_RABAdmittedList = &ie->value.choice.E_RABAdmittedList;
 break;
 case S1AP_ProtocolIE_ID_id_Target_ToSource_TransparentContainer:
 Target_ToSource_TransparentContainer =
 &ie->value.choice.Target_ToSource_TransparentContainer;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
target_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!target_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!E_RABAdmittedList) {
 ogs_error("No E_RABAdmittedList");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!Target_ToSource_TransparentContainer) {
 ogs_error("No Target_ToSource_TransparentContainer");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
source_ue = enb_ue_find_by_id(target_ue->source_ue_id);
 if (!source_ue) {
 ogs_error("No Source UE");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
mme_ue = mme_ue_find_by_id(source_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
ogs_debug(" Source : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 source_ue->enb_ue_s1ap_id, source_ue->mme_ue_s1ap_id);
 ogs_debug(" Target : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 target_ue->enb_ue_s1ap_id, target_ue->mme_ue_s1ap_id);
target_ue->enb_ue_s1ap_id = *ENB_UE_S1AP_ID;
for (i = 0; i < E_RABAdmittedList->list.count; i++) {
 S1AP_E_RABAdmittedItemIEs_t *item = NULL;
 S1AP_E_RABAdmittedItem_t *e_rab = NULL;
mme_bearer_t *bearer = NULL;
item = (S1AP_E_RABAdmittedItemIEs_t *)E_RABAdmittedList->list.array[i];
 if (!item) {
 ogs_error("No S1AP_E_RABAdmittedItemIEs_t");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
e_rab = &item->value.choice.E_RABAdmittedItem;
 if (!e_rab) {
 ogs_error("No E_RABAdmittedItem");
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
bearer = mme_bearer_find_by_ue_ebi(mme_ue, e_rab->e_RAB_ID);
 if (!bearer) {
 ogs_error("No Bearer [%d]", (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_E_RAB_ID);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
memcpy(&bearer->target_s1u_teid, e_rab->gTP_TEID.buf,
 sizeof(bearer->target_s1u_teid));
 bearer->target_s1u_teid = be32toh(bearer->target_s1u_teid);
 rv = ogs_asn_BIT_STRING_to_ip(
 &e_rab->transportLayerAddress, &bearer->target_s1u_ip);
 if (rv != OGS_OK) {
 ogs_error("No transportLayerAddress [%d]",
 (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (e_rab->dL_transportLayerAddress && e_rab->dL_gTP_TEID) {
 ogs_assert(e_rab->dL_gTP_TEID->buf);
 ogs_assert(e_rab->dL_transportLayerAddress->buf);
 memcpy(&bearer->enb_dl_teid, e_rab->dL_gTP_TEID->buf,
 sizeof(bearer->enb_dl_teid));
 bearer->enb_dl_teid = be32toh(bearer->enb_dl_teid);
 rv = ogs_asn_BIT_STRING_to_ip(
 e_rab->dL_transportLayerAddress, &bearer->enb_dl_ip);
 if (rv != OGS_OK) {
 ogs_error("No dL_transportLayerAddress [%d]",
 (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 }
if (e_rab->uL_TransportLayerAddress && e_rab->uL_GTP_TEID) {
 ogs_assert(e_rab->uL_GTP_TEID->buf);
 ogs_assert(e_rab->uL_TransportLayerAddress->buf);
 memcpy(&bearer->enb_ul_teid, e_rab->uL_GTP_TEID->buf,
 sizeof(bearer->enb_ul_teid));
 bearer->enb_ul_teid = be32toh(bearer->enb_ul_teid);
 rv = ogs_asn_BIT_STRING_to_ip(
 e_rab->uL_TransportLayerAddress, &bearer->enb_ul_ip);
 if (rv != OGS_OK) {
 ogs_error("No uL_transportLayerAddress [%d]",
 (int)e_rab->e_RAB_ID);
 r = s1ap_send_error_indication2(mme_ue,
 S1AP_Cause_PR_protocol,
 S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
 }
 }
OGS_ASN_STORE_DATA(&mme_ue->container,
 Target_ToSource_TransparentContainer);
if (mme_ue_have_indirect_tunnel(mme_ue) == true) {
 ogs_assert(OGS_OK ==
 mme_gtp_send_create_indirect_data_forwarding_tunnel_request(mme_ue)\
 );
 } else {
 r = s1ap_send_handover_command(source_ue);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 }
}
void s1ap_handle_handover_failure(mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_UnsuccessfulOutcome_t *unsuccessfulOutcome = NULL;
 S1AP_HandoverFailure_t *HandoverFailure = NULL;
S1AP_HandoverFailureIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_Cause_t *Cause = NULL;
enb_ue_t *target_ue = NULL;
 enb_ue_t *source_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 unsuccessfulOutcome = message->choice.unsuccessfulOutcome;
 ogs_assert(unsuccessfulOutcome);
 HandoverFailure = &unsuccessfulOutcome->value.choice.HandoverFailure;
 ogs_assert(HandoverFailure);
ogs_debug("HandoverFailure");
 for (i = 0; i < HandoverFailure->protocolIEs.list.count; i++) {
 ie = HandoverFailure->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_Cause:
 Cause = &ie->value.choice.Cause;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
target_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!target_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!Cause) {
 ogs_error("No Cause");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
source_ue = enb_ue_find_by_id(target_ue->source_ue_id);
 if (!source_ue) {
 ogs_error("No Source UE");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" Source : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 source_ue->enb_ue_s1ap_id, source_ue->mme_ue_s1ap_id);
 ogs_debug(" Target : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 target_ue->enb_ue_s1ap_id, target_ue->mme_ue_s1ap_id);
r = s1ap_send_handover_preparation_failure(
 source_ue, Cause->present, Cause->choice.radioNetwork);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
r = s1ap_send_ue_context_release_command(
 target_ue, S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_ho_failure_in_target_EPC_eNB_or_target_system,
 S1AP_UE_CTX_REL_S1_HANDOVER_FAILURE, 0);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
}
void s1ap_handle_handover_cancel(mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_HandoverCancel_t *HandoverCancel = NULL;
S1AP_HandoverCancelIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_Cause_t *Cause = NULL;
enb_ue_t *source_ue = NULL;
 enb_ue_t *target_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 HandoverCancel = &initiatingMessage->value.choice.HandoverCancel;
 ogs_assert(HandoverCancel);
ogs_debug("HandoverCancel");
 for (i = 0; i < HandoverCancel->protocolIEs.list.count; i++) {
 ie = HandoverCancel->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_Cause:
 Cause = &ie->value.choice.Cause;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
source_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!source_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!Cause) {
 ogs_error("No Cause");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
target_ue = enb_ue_find_by_id(source_ue->target_ue_id);
 if (!target_ue) {
 ogs_error("No Target UE");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" Source : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 source_ue->enb_ue_s1ap_id, source_ue->mme_ue_s1ap_id);
 ogs_debug(" Target : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 target_ue->enb_ue_s1ap_id, target_ue->mme_ue_s1ap_id);
r = s1ap_send_ue_context_release_command(
 target_ue, S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_handover_cancelled,
 S1AP_UE_CTX_REL_S1_HANDOVER_CANCEL, 0);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
ogs_debug("Handover Cancel : UE[eNB-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
 source_ue->enb_ue_s1ap_id,
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
}
void s1ap_handle_enb_status_transfer(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_ENBStatusTransfer_t *ENBStatusTransfer = NULL;
S1AP_ENBStatusTransferIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_ENB_StatusTransfer_TransparentContainer_t
 *ENB_StatusTransfer_TransparentContainer = NULL;
enb_ue_t *source_ue = NULL, *target_ue = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 ENBStatusTransfer = &initiatingMessage->value.choice.ENBStatusTransfer;
 ogs_assert(ENBStatusTransfer);
ogs_debug("ENBStatusTransfer");
 for (i = 0; i < ENBStatusTransfer->protocolIEs.list.count; i++) {
 ie = ENBStatusTransfer->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_StatusTransfer_TransparentContainer:
 ENB_StatusTransfer_TransparentContainer =
 &ie->value.choice.ENB_StatusTransfer_TransparentContainer;
 break;
 default:
 break;
 }
 }
 ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
/*
 * The test code is using this problem,
 * so we use WARN here instead of ERROR.
 */
 ogs_warn("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
source_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!source_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!ENB_StatusTransfer_TransparentContainer) {
 ogs_error("No ENB_StatusTransfer_TransparentContainer");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
target_ue = enb_ue_find_by_id(source_ue->target_ue_id);
 if (!target_ue) {
 ogs_error("No Target UE");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_debug(" Source : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 source_ue->enb_ue_s1ap_id, source_ue->mme_ue_s1ap_id);
 ogs_debug(" Target : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 target_ue->enb_ue_s1ap_id, target_ue->mme_ue_s1ap_id);
r = s1ap_send_mme_status_transfer(target_ue,
 ENB_StatusTransfer_TransparentContainer);
 ogs_expect(r == OGS_OK);
 /* ogs_asn_copy_ie() could be failed from received packet.
 * So we should not use ogs_assert(r != OGS_ERROR).*/
}
void s1ap_handle_handover_notification(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_HandoverNotify_t *HandoverNotify = NULL;
S1AP_HandoverNotifyIEs_t *ie = NULL;
 S1AP_MME_UE_S1AP_ID_t *MME_UE_S1AP_ID = NULL;
 S1AP_ENB_UE_S1AP_ID_t *ENB_UE_S1AP_ID = NULL;
 S1AP_EUTRAN_CGI_t *EUTRAN_CGI = NULL;
 S1AP_TAI_t *TAI = NULL;
S1AP_PLMNidentity_t *pLMNidentity = NULL;
 S1AP_CellIdentity_t *cell_ID = NULL;
 S1AP_TAC_t *tAC = NULL;
enb_ue_t *source_ue = NULL;
 enb_ue_t *target_ue = NULL;
 mme_ue_t *mme_ue = NULL;
 mme_sess_t *sess = NULL;
 mme_bearer_t *bearer = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 HandoverNotify = &initiatingMessage->value.choice.HandoverNotify;
 ogs_assert(HandoverNotify);
ogs_debug("HandoverNotify");
 for (i = 0; i < HandoverNotify->protocolIEs.list.count; i++) {
 ie = HandoverNotify->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_MME_UE_S1AP_ID:
 MME_UE_S1AP_ID = &ie->value.choice.MME_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_eNB_UE_S1AP_ID:
 ENB_UE_S1AP_ID = &ie->value.choice.ENB_UE_S1AP_ID;
 break;
 case S1AP_ProtocolIE_ID_id_EUTRAN_CGI:
 EUTRAN_CGI = &ie->value.choice.EUTRAN_CGI;
 break;
 case S1AP_ProtocolIE_ID_id_TAI:
 TAI = &ie->value.choice.TAI;
 break;
 default:
 break;
 }
 }
 ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!ENB_UE_S1AP_ID) {
 ogs_error("No ENB_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (*ENB_UE_S1AP_ID > 0x00ffffff) {
 ogs_error("Invalid ENB_UE_S1AP_ID [%lx]", *ENB_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!MME_UE_S1AP_ID) {
 ogs_error("No MME_UE_S1AP_ID");
 r = s1ap_send_error_indication(enb, NULL, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
target_ue = enb_ue_find_by_mme_ue_s1ap_id(*MME_UE_S1AP_ID);
 if (!target_ue) {
 ogs_error("No eNB UE Context : MME_UE_S1AP_ID[%lld]",
 (long long)*MME_UE_S1AP_ID);
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, NULL,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_unknown_mme_ue_s1ap_id);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
if (!EUTRAN_CGI) {
 ogs_error("No EUTRAN_CGI");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
pLMNidentity = &EUTRAN_CGI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 cell_ID = &EUTRAN_CGI->cell_ID;
 ogs_assert(cell_ID);
if (!TAI) {
 ogs_error("No TAI");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
pLMNidentity = &TAI->pLMNidentity;
 ogs_assert(pLMNidentity && pLMNidentity->size == sizeof(ogs_plmn_id_t));
 tAC = &TAI->tAC;
 ogs_assert(tAC && tAC->size == sizeof(uint16_t));
source_ue = enb_ue_find_by_id(target_ue->source_ue_id);
 if (!source_ue) {
 ogs_error("No Source UE");
 r = s1ap_send_error_indication(enb, MME_UE_S1AP_ID, ENB_UE_S1AP_ID,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
mme_ue = mme_ue_find_by_id(source_ue->mme_ue_id);
 if (!mme_ue) {
 ogs_error("No UE(mme-ue) context");
 return;
 }
ogs_debug(" Source : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 source_ue->enb_ue_s1ap_id, source_ue->mme_ue_s1ap_id);
 ogs_debug(" Target : ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
 target_ue->enb_ue_s1ap_id, target_ue->mme_ue_s1ap_id);
enb_ue_associate_mme_ue(target_ue, mme_ue);
 ogs_debug("Mobile Reachable timer stopped for IMSI[%s]", mme_ue->imsi_bcd);
 CLEAR_MME_UE_TIMER(mme_ue->t_mobile_reachable);
memcpy(&target_ue->saved.tai.plmn_id, pLMNidentity->buf,
 sizeof(target_ue->saved.tai.plmn_id));
 memcpy(&target_ue->saved.tai.tac,
 tAC->buf, sizeof(target_ue->saved.tai.tac));
 target_ue->saved.tai.tac = be16toh(target_ue->saved.tai.tac);
memcpy(&target_ue->saved.e_cgi.plmn_id, pLMNidentity->buf,
 sizeof(target_ue->saved.e_cgi.plmn_id));
 memcpy(&target_ue->saved.e_cgi.cell_id, cell_ID->buf,
 sizeof(target_ue->saved.e_cgi.cell_id));
 target_ue->saved.e_cgi.cell_id =
 (be32toh(target_ue->saved.e_cgi.cell_id) >> 4);
ogs_debug(" OLD TAI[PLMN_ID:%06x,TAC:%d]",
 ogs_plmn_id_hexdump(&mme_ue->tai.plmn_id),
 mme_ue->tai.tac);
 ogs_debug(" OLD E_CGI[PLMN_ID:%06x,CELL_ID:0x%x]",
 ogs_plmn_id_hexdump(&mme_ue->e_cgi.plmn_id),
 mme_ue->e_cgi.cell_id);
 ogs_debug(" TAI[PLMN_ID:%06x,TAC:%d]",
 ogs_plmn_id_hexdump(&target_ue->saved.tai.plmn_id),
 target_ue->saved.tai.tac);
 ogs_debug(" E_CGI[PLMN_ID:%06x,CELL_ID:0x%x]",
 ogs_plmn_id_hexdump(&target_ue->saved.e_cgi.plmn_id),
 target_ue->saved.e_cgi.cell_id);
/* Copy Stream-No/TAI/ECGI from enb_ue */
 mme_ue->enb_ostream_id = target_ue->enb_ostream_id;
 memcpy(&mme_ue->tai, &target_ue->saved.tai, sizeof(ogs_eps_tai_t));
 memcpy(&mme_ue->e_cgi, &target_ue->saved.e_cgi, sizeof(ogs_e_cgi_t));
 mme_ue->ue_location_timestamp = ogs_time_now();
r = s1ap_send_ue_context_release_command(source_ue,
 S1AP_Cause_PR_radioNetwork,
 S1AP_CauseRadioNetwork_successful_handover,
 S1AP_UE_CTX_REL_S1_HANDOVER_COMPLETE,
 ogs_local_conf()->time.handover.duration);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
ogs_list_init(&mme_ue->bearer_to_modify_list);
ogs_list_for_each(&mme_ue->sess_list, sess) {
 ogs_list_for_each(&sess->bearer_list, bearer) {
 bearer->enb_s1u_teid = bearer->target_s1u_teid;
 memcpy(&bearer->enb_s1u_ip, &bearer->target_s1u_ip,
 sizeof(ogs_ip_t));
ogs_list_add(
 &mme_ue->bearer_to_modify_list, &bearer->to_modify_node);
}
 }
if (ogs_list_count(&mme_ue->bearer_to_modify_list)) {
 ogs_assert(OGS_OK == mme_gtp_send_modify_bearer_request(mme_ue, 1, 0));
 }
}
void s1ap_handle_s1_reset(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
 int i, r;
S1AP_InitiatingMessage_t *initiatingMessage = NULL;
 S1AP_Reset_t *Reset = NULL;
S1AP_ResetIEs_t *ie = NULL;
 S1AP_Cause_t *Cause = NULL;
 S1AP_ResetType_t *ResetType = NULL;
 S1AP_UE_associatedLogicalS1_ConnectionListRes_t *partOfS1_Interface = NULL;
enb_ue_t *iter = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 initiatingMessage = message->choice.initiatingMessage;
 ogs_assert(initiatingMessage);
 Reset = &initiatingMessage->value.choice.Reset;
 ogs_assert(Reset);
ogs_warn("Reset");
for (i = 0; i < Reset->protocolIEs.list.count; i++) {
 ie = Reset->protocolIEs.list.array[i];
 switch (ie->id) {
 case S1AP_ProtocolIE_ID_id_Cause:
 Cause = &ie->value.choice.Cause;
 break;
 case S1AP_ProtocolIE_ID_id_ResetType:
 ResetType = &ie->value.choice.ResetType;
 break;
 default:
 break;
 }
 }
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
if (!Cause) {
 ogs_error("No Cause");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
ogs_warn(" Cause[Group:%d Cause:%d]",
 Cause->present, (int)Cause->choice.radioNetwork);
if (!ResetType) {
 ogs_error("No ResetType");
 r = s1ap_send_error_indication(enb, NULL, NULL,
 S1AP_Cause_PR_protocol, S1AP_CauseProtocol_semantic_error);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 return;
 }
switch (ResetType->present) {
 case S1AP_ResetType_PR_s1_Interface:
 ogs_warn(" S1AP_ResetType_PR_s1_Interface");
mme_gtp_send_release_all_ue_in_enb(
 enb, OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_RESET_ALL);
/*
 * TS36.413
 * 8.7.1.2.1 Reset Procedure Initiated from the MME
 *
 * The eNB does not need to wait for the release of radio resources
 * to be completed before returning the RESET ACKNOWLEDGE message.
 *
 * 8.7.1.2.2 Reset Procedure Initiated from the E-UTRAN
 * After the MME has released all assigned S1 resources and
 * the UE S1AP IDs for all indicated UE associations which can be used
 * for new UE-associated logical S1-connections over the S1 interface,
 * the MME shall respond with the RESET ACKNOWLEDGE message.
 */
 if (ogs_list_count(&enb->enb_ue_list) == 0) {
 r = s1ap_send_s1_reset_ack(enb, NULL);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
 }
break;
case S1AP_ResetType_PR_partOfS1_Interface:
 ogs_warn(" S1AP_ResetType_PR_partOfS1_Interface");
partOfS1_Interface = ResetType->choice.partOfS1_Interface;
 ogs_assert(partOfS1_Interface);
if (enb->s1_reset_ack)
 ogs_pkbuf_free(enb->s1_reset_ack);
enb->s1_reset_ack = ogs_s1ap_build_s1_reset_ack(partOfS1_Interface);
 if (!enb->s1_reset_ack) {
 ogs_error("ogs_s1ap_build_s1_reset_ack() failed");
 return;
 }
for (i = 0; i < partOfS1_Interface->list.count; i++) {
 S1AP_UE_associatedLogicalS1_ConnectionItemRes_t *ie2 = NULL;
 S1AP_UE_associatedLogicalS1_ConnectionItem_t *item = NULL;
enb_ue_t *enb_ue = NULL;
 mme_ue_t *mme_ue = NULL;
ie2 = (S1AP_UE_associatedLogicalS1_ConnectionItemRes_t *)
 partOfS1_Interface->list.array[i];
 if (!ie2) {
 ogs_error("No S1AP_UE_associatedLogicalS1_ConnectionItemRes_t");
 continue;
 }
item = &ie2->value.choice.UE_associatedLogicalS1_ConnectionItem;
 if (!item) {
 ogs_error("No UE_associatedLogicalS1_ConnectionItem");
 continue;
 }
ogs_warn(" MME_UE_S1AP_ID[%d] ENB_UE_S1AP_ID[%d]",
 item->mME_UE_S1AP_ID ? (int)*item->mME_UE_S1AP_ID : -1,
 item->eNB_UE_S1AP_ID ? (int)*item->eNB_UE_S1AP_ID : -1);
if (item->mME_UE_S1AP_ID)
 enb_ue = enb_ue_find_by_mme_ue_s1ap_id( *item->mME_UE_S1AP_ID);
 else if (item->eNB_UE_S1AP_ID)
 enb_ue = enb_ue_find_by_enb_ue_s1ap_id(enb,
 *item->eNB_UE_S1AP_ID);
if (enb_ue == NULL) {
 ogs_error("Cannot find S1 Context "
 "(MME_UE_S1AP_ID[%d] ENB_UE_S1AP_ID[%d])",
 item->mME_UE_S1AP_ID ? (int)*item->mME_UE_S1AP_ID : -1,
 item->eNB_UE_S1AP_ID ? (int)*item->eNB_UE_S1AP_ID : -1);
 continue;
 }
/* ENB_UE Context where PartOfS1_interface was requested */
 enb_ue->part_of_s1_reset_requested = true;
mme_ue = mme_ue_find_by_id(enb_ue->mme_ue_id);
 if (mme_ue) {
 ogs_assert(OGS_OK ==
 mme_gtp_send_release_access_bearers_request(mme_ue,
 OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_RESET_PARTIAL));
 } else {
 enb_ue_remove(enb_ue);
 }
 }
/*
 * TS36.413
 * 8.7.1.2.1 Reset Procedure Initiated from the MME
 *
 * The eNB does not need to wait for the release of radio resources
 * to be completed before returning the RESET ACKNOWLEDGE message.
 *
 * 8.7.1.2.2 Reset Procedure Initiated from the E-UTRAN
 * After the MME has released all assigned S1 resources and
 * the UE S1AP IDs for all indicated UE associations which can be used
 * for new UE-associated logical S1-connections over the S1 interface,
 * the MME shall respond with the RESET ACKNOWLEDGE message.
 */
 ogs_list_for_each(&enb->enb_ue_list, iter) {
 if (iter->part_of_s1_reset_requested == true) {
 /* The ENB_UE context
 * where PartOfS1_interface was requested
 * still remains */
 return;
 }
 }
/* All ENB_UE context
 * where PartOfS1_interface was requested
 * REMOVED */
 ogs_assert(enb->s1_reset_ack);
 r = s1ap_send_to_enb(enb, enb->s1_reset_ack, S1AP_NON_UE_SIGNALLING);
 ogs_expect(r == OGS_OK);
 ogs_assert(r != OGS_ERROR);
/* Clear S1-Reset Ack Buffer */
 enb->s1_reset_ack = NULL;
 break;
 default:
 ogs_warn("Invalid ResetType[%d]", ResetType->present);
 break;
 }
}
void s1ap_handle_write_replace_warning_response(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
 S1AP_WriteReplaceWarningResponse_t *WriteReplaceWarningResponse = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 successfulOutcome = message->choice.successfulOutcome;
 ogs_assert(successfulOutcome);
 WriteReplaceWarningResponse =
 &successfulOutcome->value.choice.WriteReplaceWarningResponse;
 ogs_assert(WriteReplaceWarningResponse);
ogs_debug("WriteReplaceWarningResponse");
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
}
void s1ap_handle_kill_response(
 mme_enb_t *enb, ogs_s1ap_message_t *message)
{
 char buf[OGS_ADDRSTRLEN];
S1AP_SuccessfulOutcome_t *successfulOutcome = NULL;
 S1AP_KillResponse_t *KillResponse = NULL;
ogs_assert(enb);
 ogs_assert(enb->sctp.sock);
ogs_assert(message);
 successfulOutcome = message->choice.successfulOutcome;
 ogs_assert(successfulOutcome);
 KillResponse =
 &successfulOutcome->value.choice.KillResponse;
 ogs_assert(KillResponse);
ogs_debug("KillResponse");
ogs_debug(" IP[%s] ENB_ID[%d]",
 OGS_ADDR(enb->sctp.addr, buf), enb->enb_id);
}