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janusdata / raw_data /open5gs_source_code /src /mme /s1ap-handler.c
UmakantKulkarni
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 /*
* 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);
}