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openairinterface5g/openair3/S1AP/s1ap_eNB.c
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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file s1ap_eNB.c
* \brief S1AP eNB task
* \author S. Roux and Navid Nikaein
* \date 2010 - 2015
* \email: navid.nikaein@eurecom.fr
* \version 1.0
* @ingroup _s1ap
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "openair3/SECU/kdf.h"
#include "tree.h"
#include "queue.h"
#include "intertask_interface.h"
#include "s1ap_eNB_default_values.h"
#include "s1ap_common.h"
#include "s1ap_eNB_defs.h"
#include "s1ap_eNB.h"
#include "s1ap_eNB_encoder.h"
#include "s1ap_eNB_handlers.h"
#include "s1ap_eNB_nnsf.h"
#include "s1ap_eNB_nas_procedures.h"
#include "s1ap_eNB_management_procedures.h"
#include "s1ap_eNB_context_management_procedures.h"
#include "s1ap_eNB_itti_messaging.h"
#include "s1ap_eNB_ue_context.h" // test, to be removed
#include "assertions.h"
#include "conversions.h"
#if defined(TEST_S1C_MME)
#include "oaisim_mme_test_s1c.h"
#endif
static int s1ap_eNB_generate_s1_setup_request(
s1ap_eNB_instance_t *instance_p, s1ap_eNB_mme_data_t *s1ap_mme_data_p);
void s1ap_eNB_handle_register_eNB(instance_t instance, s1ap_register_enb_req_t *s1ap_register_eNB);
void s1ap_eNB_handle_sctp_association_resp(instance_t instance, sctp_new_association_resp_t *sctp_new_association_resp);
static int s1ap_sctp_req(s1ap_eNB_instance_t *instance_p,
s1ap_eNB_mme_data_t *s1ap_mme_data_p);
void s1ap_eNB_timer_expired(instance_t instance,
timer_has_expired_t *msg_p);
int s1ap_timer_setup(
uint32_t interval_sec,
uint32_t interval_us,
task_id_t task_id,
int32_t instance,
uint32_t timer_kind,
timer_type_t type,
void *timer_arg,
long *timer_id)
{
uint32_t *timeoutArg=NULL;
int ret=0;
timeoutArg=malloc(sizeof(uint32_t));
*timeoutArg=timer_kind;
ret=timer_setup(interval_sec,
interval_us,
task_id,
instance,
type,
(void*)timeoutArg,
timer_id);
return ret;
}
int s1ap_timer_remove(long timer_id)
{
int ret;
ret=timer_remove(timer_id);
return ret;
}
uint32_t s1ap_generate_eNB_id(void)
{
/* Retrieve the host name */
char hostname[32] = {0};
int const ret = gethostname(hostname, sizeof(hostname));
DevAssert(ret == 0);
uint8_t key[32] = {"eurecom"};
byte_array_t data = {.len = 32, .buf = (uint8_t *)hostname};
uint8_t out[32] = {0};
kdf(key, data, 32, out);
uint32_t const eNB_id = ((out[0] << 24) | (out[1] << 16) | (out[2] << 8) | out[3]);
return eNB_id;
}
static void s1ap_eNB_register_mme(s1ap_eNB_instance_t *instance_p,
net_ip_address_t *mme_ip_address,
uint16_t mme_port,
net_ip_address_t *local_ip_addr,
uint16_t in_streams,
uint16_t out_streams,
uint8_t broadcast_plmn_num,
uint8_t broadcast_plmn_index[PLMN_LIST_MAX_SIZE]) {
MessageDef *message_p = NULL;
sctp_new_association_req_t *sctp_new_association_req_p = NULL;
s1ap_eNB_mme_data_t *s1ap_mme_data_p = NULL;
// struct s1ap_eNB_mme_data_s *mme = NULL;
DevAssert(instance_p != NULL);
DevAssert(mme_ip_address != NULL);
message_p = itti_alloc_new_message(TASK_S1AP, 0, SCTP_NEW_ASSOCIATION_REQ);
sctp_new_association_req_p = &message_p->ittiMsg.sctp_new_association_req;
sctp_new_association_req_p->port = mme_port;
sctp_new_association_req_p->ppid = S1AP_SCTP_PPID;
sctp_new_association_req_p->in_streams = in_streams;
sctp_new_association_req_p->out_streams = out_streams;
memcpy(&sctp_new_association_req_p->remote_address,
mme_ip_address,
sizeof(*mme_ip_address));
memcpy(&sctp_new_association_req_p->local_address,
local_ip_addr,
sizeof(*local_ip_addr));
S1AP_INFO("[eNB %ld] check the mme registration state\n",instance_p->instance);
/* Create new MME descriptor */
s1ap_mme_data_p = calloc(1, sizeof(*s1ap_mme_data_p));
DevAssert(s1ap_mme_data_p != NULL);
s1ap_mme_data_p->cnx_id = s1ap_eNB_fetch_add_global_cnx_id();
sctp_new_association_req_p->ulp_cnx_id = s1ap_mme_data_p->cnx_id;
s1ap_mme_data_p->assoc_id = -1;
s1ap_mme_data_p->broadcast_plmn_num = broadcast_plmn_num;
memcpy(&s1ap_mme_data_p->mme_s1_ip,
mme_ip_address,
sizeof(*mme_ip_address));
s1ap_mme_data_p->mme_port = mme_port;
for (int i = 0; i < broadcast_plmn_num; ++i)
s1ap_mme_data_p->broadcast_plmn_index[i] = broadcast_plmn_index[i];
s1ap_mme_data_p->s1ap_eNB_instance = instance_p;
STAILQ_INIT(&s1ap_mme_data_p->served_gummei);
/* Insert the new descriptor in list of known MME
* but not yet associated.
*/
RB_INSERT(s1ap_mme_map, &instance_p->s1ap_mme_head, s1ap_mme_data_p);
s1ap_mme_data_p->state = S1AP_ENB_STATE_DISCONNECTED;
memcpy( &(s1ap_mme_data_p->mme_ip_address), mme_ip_address, sizeof(net_ip_address_t) );
s1ap_mme_data_p->overload_state = S1AP_NO_OVERLOAD;
s1ap_mme_data_p->sctp_req_cnt++;
s1ap_mme_data_p->timer_id = S1AP_TIMERID_INIT;
instance_p->s1ap_mme_pending_nb ++;
itti_send_msg_to_task(TASK_SCTP, instance_p->instance, message_p);
}
void s1ap_eNB_handle_register_eNB(instance_t instance, s1ap_register_enb_req_t *s1ap_register_eNB) {
s1ap_eNB_instance_t *new_instance;
uint8_t index;
DevAssert(s1ap_register_eNB != NULL);
/* Look if the provided instance already exists */
new_instance = s1ap_eNB_get_instance(instance);
if (new_instance != NULL) {
/* Checks if it is a retry on the same eNB */
DevCheck(new_instance->eNB_id == s1ap_register_eNB->eNB_id, new_instance->eNB_id, s1ap_register_eNB->eNB_id, 0);
DevCheck(new_instance->cell_type == s1ap_register_eNB->cell_type, new_instance->cell_type, s1ap_register_eNB->cell_type, 0);
DevCheck(new_instance->num_plmn == s1ap_register_eNB->num_plmn, new_instance->num_plmn, s1ap_register_eNB->num_plmn, 0);
DevCheck(new_instance->tac == s1ap_register_eNB->tac, new_instance->tac, s1ap_register_eNB->tac, 0);
for (int i = 0; i < new_instance->num_plmn; i++) {
DevCheck(new_instance->mcc[i] == s1ap_register_eNB->mcc[i], new_instance->mcc[i], s1ap_register_eNB->mcc[i], 0);
DevCheck(new_instance->mnc[i] == s1ap_register_eNB->mnc[i], new_instance->mnc[i], s1ap_register_eNB->mnc[i], 0);
DevCheck(new_instance->mnc_digit_length[i] == s1ap_register_eNB->mnc_digit_length[i], new_instance->mnc_digit_length[i], s1ap_register_eNB->mnc_digit_length[i], 0);
}
DevCheck(new_instance->default_drx == s1ap_register_eNB->default_drx, new_instance->default_drx, s1ap_register_eNB->default_drx, 0);
} else {
new_instance = calloc(1, sizeof(s1ap_eNB_instance_t));
DevAssert(new_instance != NULL);
RB_INIT(&new_instance->s1ap_ue_head);
RB_INIT(&new_instance->s1ap_mme_head);
/* Copy usefull parameters */
new_instance->instance = instance;
new_instance->eNB_name = s1ap_register_eNB->eNB_name;
new_instance->eNB_id = s1ap_register_eNB->eNB_id;
new_instance->cell_type = s1ap_register_eNB->cell_type;
new_instance->tac = s1ap_register_eNB->tac;
memcpy(&new_instance->eNB_s1_ip,
&s1ap_register_eNB->enb_ip_address,
sizeof(s1ap_register_eNB->enb_ip_address));
for (int i = 0; i < s1ap_register_eNB->num_plmn; i++) {
new_instance->mcc[i] = s1ap_register_eNB->mcc[i];
new_instance->mnc[i] = s1ap_register_eNB->mnc[i];
new_instance->mnc_digit_length[i] = s1ap_register_eNB->mnc_digit_length[i];
}
memcpy( &(new_instance->enb_ip_address), &(s1ap_register_eNB->enb_ip_address), sizeof(net_ip_address_t) );
new_instance->s1_setuprsp_wait_timer = s1ap_register_eNB->s1_setuprsp_wait_timer;
new_instance->s1_setupreq_wait_timer = s1ap_register_eNB->s1_setupreq_wait_timer;
new_instance->s1_setupreq_count = s1ap_register_eNB->s1_setupreq_count;
new_instance->sctp_req_timer = s1ap_register_eNB->sctp_req_timer;
new_instance->sctp_req_count = s1ap_register_eNB->sctp_req_count;
new_instance->sctp_in_streams = s1ap_register_eNB->sctp_in_streams;
new_instance->sctp_out_streams = s1ap_register_eNB->sctp_out_streams;
new_instance->num_plmn = s1ap_register_eNB->num_plmn;
new_instance->default_drx = s1ap_register_eNB->default_drx;
/* Add the new instance to the list of eNB (meaningfull in virtual mode) */
s1ap_eNB_insert_new_instance(new_instance);
S1AP_INFO("Registered new eNB[%ld] and %s eNB id %u\n",
instance,
s1ap_register_eNB->cell_type == CELL_MACRO_ENB ? "macro" : "home",
s1ap_register_eNB->eNB_id);
}
if( s1ap_register_eNB->nb_mme > S1AP_MAX_NB_MME_IP_ADDRESS )
{
S1AP_ERROR("Invalid MME number = %d\n ", s1ap_register_eNB->nb_mme);
s1ap_register_eNB->nb_mme = S1AP_MAX_NB_MME_IP_ADDRESS;
}
new_instance->s1ap_mme_nb = s1ap_register_eNB->nb_mme;
/* Trying to connect to provided list of MME ip address */
for (index = 0; index < s1ap_register_eNB->nb_mme; index++) {
net_ip_address_t *mme_ip = &s1ap_register_eNB->mme_ip_address[index];
uint16_t mme_port = s1ap_register_eNB->mme_port[index];
struct s1ap_eNB_mme_data_s *mme = NULL;
RB_FOREACH(mme, s1ap_mme_map, &new_instance->s1ap_mme_head) {
/* Compare whether IPv4 and IPv6 information is already present, in which
* wase we do not register again */
if (mme->mme_s1_ip.ipv4 == mme_ip->ipv4 && (!mme_ip->ipv4
|| strncmp(mme->mme_s1_ip.ipv4_address, mme_ip->ipv4_address, 16) == 0)
&& mme->mme_s1_ip.ipv6 == mme_ip->ipv6 && (!mme_ip->ipv6
|| strncmp(mme->mme_s1_ip.ipv6_address, mme_ip->ipv6_address, 46) == 0))
break;
}
if (mme)
continue;
s1ap_eNB_register_mme(new_instance,
mme_ip,
mme_port,
&s1ap_register_eNB->enb_ip_address,
s1ap_register_eNB->sctp_in_streams,
s1ap_register_eNB->sctp_out_streams,
s1ap_register_eNB->broadcast_plmn_num[index],
s1ap_register_eNB->broadcast_plmn_index[index]);
}
}
void s1ap_eNB_handle_sctp_association_resp(instance_t instance, sctp_new_association_resp_t *sctp_new_association_resp) {
s1ap_eNB_instance_t *instance_p;
s1ap_eNB_mme_data_t *s1ap_mme_data_p;
s1ap_eNB_ue_context_t *ue_p = NULL;
MessageDef *message_p = NULL;
uint32_t timer_kind = 0;
struct plmn_identity_s* plmnInfo;
struct served_group_id_s* groupInfo;
struct served_gummei_s* gummeiInfo;
struct mme_code_s* mmeCode;
int8_t cnt = 0;
unsigned enb_s1ap_id[NUMBER_OF_UE_MAX];
DevAssert(sctp_new_association_resp != NULL);
instance_p = s1ap_eNB_get_instance(instance);
DevAssert(instance_p != NULL);
s1ap_mme_data_p = s1ap_eNB_get_MME(instance_p, -1,
sctp_new_association_resp->ulp_cnx_id);
DevAssert(s1ap_mme_data_p != NULL);
memset(enb_s1ap_id, 0, sizeof(enb_s1ap_id) );
if( s1ap_mme_data_p->timer_id != S1AP_TIMERID_INIT ) {
s1ap_timer_remove( s1ap_mme_data_p->timer_id );
s1ap_mme_data_p->timer_id = S1AP_TIMERID_INIT;
}
if( sctp_new_association_resp->sctp_state != SCTP_STATE_ESTABLISHED ) {
RB_FOREACH(ue_p, s1ap_ue_map, &instance_p->s1ap_ue_head) {
if( ue_p->mme_ref == s1ap_mme_data_p ) {
if(cnt < NUMBER_OF_UE_MAX) {
enb_s1ap_id[cnt] = ue_p->eNB_ue_s1ap_id;
cnt++;
message_p = NULL;
message_p = itti_alloc_new_message(TASK_S1AP, 0, S1AP_UE_CONTEXT_RELEASE_COMMAND);
if( message_p != NULL ) {
S1AP_UE_CONTEXT_RELEASE_COMMAND(message_p).eNB_ue_s1ap_id = ue_p->eNB_ue_s1ap_id;
if( itti_send_msg_to_task(TASK_RRC_ENB, ue_p->eNB_instance->instance, message_p) < 0 ) {
S1AP_ERROR("UE Context Release Command Transmission Failure: eNB_ue_s1ap_id=%u\n", ue_p->eNB_ue_s1ap_id);
}
} else {
S1AP_ERROR("Invalid message_p : eNB_ue_s1ap_id=%u\n", ue_p->eNB_ue_s1ap_id);
}
}else{
S1AP_ERROR("s1ap_eNB_handle_sctp_association_resp: cnt %d > max\n", cnt);
}
}
}
for( ; cnt > 0 ; ) {
cnt--;
struct s1ap_eNB_ue_context_s *ue_context_p = NULL;
struct s1ap_eNB_ue_context_s *s1ap_ue_context_p = NULL;
ue_context_p = s1ap_eNB_get_ue_context(instance_p, (uint32_t)enb_s1ap_id[cnt]);
if (ue_context_p != NULL) {
s1ap_ue_context_p = RB_REMOVE(s1ap_ue_map, &instance_p->s1ap_ue_head, ue_context_p);
s1ap_eNB_free_ue_context(s1ap_ue_context_p);
}
}
s1ap_mme_data_p->mme_name = 0;
s1ap_mme_data_p->overload_state = S1AP_NO_OVERLOAD;
s1ap_mme_data_p->nextstream = 0;
s1ap_mme_data_p->in_streams = 0;
s1ap_mme_data_p->out_streams = 0;
s1ap_mme_data_p->assoc_id = -1;
while (!STAILQ_EMPTY(&s1ap_mme_data_p->served_gummei)) {
gummeiInfo = STAILQ_FIRST(&s1ap_mme_data_p->served_gummei);
STAILQ_REMOVE_HEAD(&s1ap_mme_data_p->served_gummei, next);
while (!STAILQ_EMPTY(&gummeiInfo->served_plmns)) {
plmnInfo = STAILQ_FIRST(&gummeiInfo->served_plmns);
STAILQ_REMOVE_HEAD(&gummeiInfo->served_plmns, next);
free(plmnInfo);
}
while (!STAILQ_EMPTY(&gummeiInfo->served_group_ids)) {
groupInfo = STAILQ_FIRST(&gummeiInfo->served_group_ids);
STAILQ_REMOVE_HEAD(&gummeiInfo->served_group_ids, next);
free(groupInfo);
}
while (!STAILQ_EMPTY(&gummeiInfo->mme_codes)) {
mmeCode = STAILQ_FIRST(&gummeiInfo->mme_codes);
STAILQ_REMOVE_HEAD(&gummeiInfo->mme_codes, next);
free(mmeCode);
}
free(gummeiInfo);
}
STAILQ_INIT(&s1ap_mme_data_p->served_gummei);
if( s1ap_mme_data_p->state == S1AP_ENB_STATE_DISCONNECTED ) {
if( (s1ap_mme_data_p->sctp_req_cnt <= instance_p->sctp_req_count) ||
(instance_p->sctp_req_count == 0xffff) ) {
timer_kind = s1ap_mme_data_p->cnx_id;
timer_kind = timer_kind | S1AP_MMEIND;
timer_kind = timer_kind | SCTP_REQ_WAIT;
if( s1ap_timer_setup( instance_p->sctp_req_timer, 0, TASK_S1AP, instance_p->instance,
timer_kind, TIMER_ONE_SHOT, NULL, &s1ap_mme_data_p->timer_id) < 0 ) {
S1AP_ERROR("Timer Start NG(SCTP retransmission wait timer) : MME=%d\n",s1ap_mme_data_p->cnx_id);
s1ap_sctp_req( instance_p, s1ap_mme_data_p );
}
} else {
S1AP_ERROR("Retransmission count exceeded of SCTP : MME=%d\n",s1ap_mme_data_p->cnx_id);
}
} else {
S1AP_ERROR("SCTP disconnection reception : MME = %d\n",s1ap_mme_data_p->cnx_id);
if( (s1ap_mme_data_p->sctp_req_cnt <= instance_p->sctp_req_count) ||
(instance_p->sctp_req_count == 0xffff) ) {
s1ap_sctp_req( instance_p, s1ap_mme_data_p );
} else {
S1AP_ERROR("Retransmission count exceeded of SCTP : MME=%d\n",s1ap_mme_data_p->cnx_id);
}
s1ap_mme_data_p->state = S1AP_ENB_STATE_DISCONNECTED;
}
} else {
/* Update parameters */
s1ap_mme_data_p->assoc_id = sctp_new_association_resp->assoc_id;
s1ap_mme_data_p->in_streams = sctp_new_association_resp->in_streams;
s1ap_mme_data_p->out_streams = sctp_new_association_resp->out_streams;
/* Prepare new S1 Setup Request */
s1ap_mme_data_p->s1_setupreq_cnt = 0;
s1ap_mme_data_p->sctp_req_cnt = 0;
if (s1ap_eNB_generate_s1_setup_request(instance_p, s1ap_mme_data_p) == -1) {
S1AP_ERROR("s1ap eNB generate s1 setup request failed\n");
return;
}
}
}
static
void s1ap_eNB_handle_sctp_data_ind(sctp_data_ind_t *sctp_data_ind) {
int result;
DevAssert(sctp_data_ind != NULL);
#if defined(TEST_S1C_MME)
mme_test_s1_notify_sctp_data_ind(sctp_data_ind->assoc_id, sctp_data_ind->stream,
sctp_data_ind->buffer, sctp_data_ind->buffer_length);
#else
if (s1ap_eNB_handle_message(sctp_data_ind->assoc_id, sctp_data_ind->stream,
sctp_data_ind->buffer, sctp_data_ind->buffer_length) == -1) {
S1AP_ERROR("Failed to handle s1ap eNB message\n");
}
#endif
result = itti_free(TASK_UNKNOWN, sctp_data_ind->buffer);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
}
void s1ap_eNB_timer_expired(
instance_t instance,
timer_has_expired_t *msg_p)
{
uint32_t timer_kind = 0;
int16_t line_ind = 0;
s1ap_eNB_mme_data_t *mme_desc_p = NULL;
uint32_t timer_ind = 0;
s1ap_eNB_instance_t *instance_p = NULL;
long timer_id = S1AP_TIMERID_INIT;
instance_p = s1ap_eNB_get_instance(instance);
if(msg_p->arg!=NULL){
timer_kind = *((uint32_t*)msg_p->arg);
free(msg_p->arg);
}else{
S1AP_ERROR("s1 timer timer_kind is NULL\n");
return;
}
line_ind = (int16_t)(timer_kind & S1AP_LINEIND);
timer_id = msg_p->timer_id;
if( (timer_kind & S1AP_MMEIND) == S1AP_MMEIND ) {
mme_desc_p = s1ap_eNB_get_MME(instance_p, -1, line_ind);
if(mme_desc_p != NULL) {
if( timer_id == mme_desc_p->timer_id ) {
mme_desc_p->timer_id = S1AP_TIMERID_INIT;
timer_ind = timer_kind & S1AP_TIMERIND;
switch(timer_ind)
{
case S1_SETRSP_WAIT:
{
if( (instance_p->s1_setupreq_count >= mme_desc_p->s1_setupreq_cnt) ||
(instance_p->s1_setupreq_count == 0xffff) ) {
s1ap_eNB_generate_s1_setup_request( instance_p, mme_desc_p );
} else {
S1AP_ERROR("Retransmission count exceeded of S1 SETUP REQUEST : MME=%d\n",line_ind);
}
break;
}
case S1_SETREQ_WAIT:
{
if( (instance_p->s1_setupreq_count >= mme_desc_p->s1_setupreq_cnt) ||
(instance_p->s1_setupreq_count == 0xffff) ) {
s1ap_eNB_generate_s1_setup_request( instance_p, mme_desc_p );
} else {
S1AP_ERROR("Retransmission count exceeded of S1 SETUP REQUEST : MME=%d\n",line_ind);
}
break;
}
case SCTP_REQ_WAIT:
{
if( (instance_p->sctp_req_count >= mme_desc_p->sctp_req_cnt) ||
(instance_p->sctp_req_count == 0xffff) ) {
s1ap_sctp_req( instance_p, mme_desc_p );
} else {
S1AP_ERROR("Retransmission count exceeded of SCTP : MME=%d\n",line_ind);
}
break;
}
default:
{
S1AP_WARN("Invalid Timer indication\n");
break;
}
}
} else {
S1AP_DEBUG("Unmatch timer id\n");
return;
}
} else {
S1AP_WARN("Not applicable MME detected : connection id = %d\n", line_ind);
return;
}
}
return;
}
void s1ap_eNB_init(void) {
S1AP_DEBUG("Starting S1AP layer\n");
s1ap_eNB_prepare_internal_data();
itti_mark_task_ready(TASK_S1AP);
}
void *s1ap_eNB_process_itti_msg(void *notUsed) {
MessageDef *received_msg = NULL;
int result;
itti_receive_msg(TASK_S1AP, &received_msg);
switch (ITTI_MSG_ID(received_msg)) {
case TERMINATE_MESSAGE:
S1AP_WARN(" *** Exiting S1AP thread\n");
itti_exit_task();
break;
case S1AP_REGISTER_ENB_REQ: {
/* Register a new eNB.
* in Virtual mode eNBs will be distinguished using the mod_id/
* Each eNB has to send an S1AP_REGISTER_ENB message with its
* own parameters.
*/
s1ap_eNB_handle_register_eNB(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_REGISTER_ENB_REQ(received_msg));
}
break;
case SCTP_NEW_ASSOCIATION_RESP: {
s1ap_eNB_handle_sctp_association_resp(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&received_msg->ittiMsg.sctp_new_association_resp);
}
break;
case SCTP_DATA_IND: {
s1ap_eNB_handle_sctp_data_ind(&received_msg->ittiMsg.sctp_data_ind);
}
break;
case S1AP_NAS_FIRST_REQ: {
s1ap_eNB_handle_nas_first_req(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_NAS_FIRST_REQ(received_msg));
}
break;
case S1AP_UPLINK_NAS: {
s1ap_eNB_nas_uplink(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_UPLINK_NAS(received_msg));
}
break;
case S1AP_UE_CAPABILITIES_IND: {
s1ap_eNB_ue_capabilities(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_UE_CAPABILITIES_IND(received_msg));
}
break;
case S1AP_INITIAL_CONTEXT_SETUP_RESP: {
s1ap_eNB_initial_ctxt_resp(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_INITIAL_CONTEXT_SETUP_RESP(received_msg));
}
break;
case S1AP_E_RAB_SETUP_RESP: {
s1ap_eNB_e_rab_setup_resp(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_E_RAB_SETUP_RESP(received_msg));
}
break;
case S1AP_E_RAB_MODIFY_RESP: {
s1ap_eNB_e_rab_modify_resp(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_E_RAB_MODIFY_RESP(received_msg));
}
break;
case S1AP_NAS_NON_DELIVERY_IND: {
s1ap_eNB_nas_non_delivery_ind(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_NAS_NON_DELIVERY_IND(received_msg));
}
break;
case S1AP_PATH_SWITCH_REQ: {
s1ap_eNB_path_switch_req(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_PATH_SWITCH_REQ(received_msg));
}
break;
case S1AP_E_RAB_MODIFICATION_IND: {
s1ap_eNB_generate_E_RAB_Modification_Indication(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_E_RAB_MODIFICATION_IND(received_msg));
}
break;
case S1AP_UE_CONTEXT_RELEASE_COMPLETE: {
s1ap_ue_context_release_complete(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_UE_CONTEXT_RELEASE_COMPLETE(received_msg));
}
break;
case S1AP_UE_CONTEXT_RELEASE_REQ: {
s1ap_eNB_instance_t *s1ap_eNB_instance_p = NULL; // test
struct s1ap_eNB_ue_context_s *ue_context_p = NULL; // test
s1ap_ue_context_release_req(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_UE_CONTEXT_RELEASE_REQ(received_msg));
s1ap_eNB_instance_p = s1ap_eNB_get_instance(ITTI_MSG_DESTINATION_INSTANCE(received_msg)); // test
DevAssert(s1ap_eNB_instance_p != NULL); // test
if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
S1AP_UE_CONTEXT_RELEASE_REQ(received_msg).eNB_ue_s1ap_id)) == NULL) { // test
/* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
S1AP_ERROR("Failed to find ue context associated with eNB ue s1ap id: %u\n",
S1AP_UE_CONTEXT_RELEASE_REQ(received_msg).eNB_ue_s1ap_id); // test
} // test
}
break;
case S1AP_E_RAB_RELEASE_RESPONSE: {
s1ap_eNB_e_rab_release_resp(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&S1AP_E_RAB_RELEASE_RESPONSE(received_msg));
}
break;
case TIMER_HAS_EXPIRED:
{
s1ap_eNB_timer_expired(ITTI_MSG_DESTINATION_INSTANCE(received_msg),
&received_msg->ittiMsg.timer_has_expired);
}
break;
default:
S1AP_ERROR("Received unhandled message: %d:%s\n",
ITTI_MSG_ID(received_msg), ITTI_MSG_NAME(received_msg));
break;
}
result = itti_free (ITTI_MSG_ORIGIN_ID(received_msg), received_msg);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
received_msg = NULL;
return NULL;
}
void *s1ap_eNB_task(void *arg) {
s1ap_eNB_init();
while (1) {
(void) s1ap_eNB_process_itti_msg(NULL);
}
return NULL;
}
//-----------------------------------------------------------------------------
/*
* eNB generate a S1 setup request towards MME
*/
static int s1ap_eNB_generate_s1_setup_request(
s1ap_eNB_instance_t *instance_p,
s1ap_eNB_mme_data_t *s1ap_mme_data_p)
//-----------------------------------------------------------------------------
{
S1AP_S1AP_PDU_t pdu;
S1AP_S1SetupRequest_t *out = NULL;
S1AP_S1SetupRequestIEs_t *ie = NULL;
S1AP_SupportedTAs_Item_t *ta = NULL;
S1AP_PLMNidentity_t *plmn = NULL;
uint8_t *buffer = NULL;
uint32_t len = 0;
int ret = 0;
uint32_t timer_kind = 0;
DevAssert(instance_p != NULL);
DevAssert(s1ap_mme_data_p != NULL);
s1ap_mme_data_p->state = S1AP_ENB_STATE_WAITING;
/* Prepare the S1AP message to encode */
memset(&pdu, 0, sizeof(pdu));
pdu.present = S1AP_S1AP_PDU_PR_initiatingMessage;
pdu.choice.initiatingMessage.procedureCode = S1AP_ProcedureCode_id_S1Setup;
pdu.choice.initiatingMessage.criticality = S1AP_Criticality_reject;
pdu.choice.initiatingMessage.value.present = S1AP_InitiatingMessage__value_PR_S1SetupRequest;
out = &pdu.choice.initiatingMessage.value.choice.S1SetupRequest;
/* mandatory */
ie = (S1AP_S1SetupRequestIEs_t *)calloc(1, sizeof(S1AP_S1SetupRequestIEs_t));
ie->id = S1AP_ProtocolIE_ID_id_Global_ENB_ID;
ie->criticality = S1AP_Criticality_reject;
ie->value.present = S1AP_S1SetupRequestIEs__value_PR_Global_ENB_ID;
MCC_MNC_TO_PLMNID(instance_p->mcc[s1ap_mme_data_p->broadcast_plmn_index[0]],
instance_p->mnc[s1ap_mme_data_p->broadcast_plmn_index[0]],
instance_p->mnc_digit_length[s1ap_mme_data_p->broadcast_plmn_index[0]],
&ie->value.choice.Global_ENB_ID.pLMNidentity);
ie->value.choice.Global_ENB_ID.eNB_ID.present = S1AP_ENB_ID_PR_macroENB_ID;
MACRO_ENB_ID_TO_BIT_STRING(instance_p->eNB_id,
&ie->value.choice.Global_ENB_ID.eNB_ID.choice.macroENB_ID);
S1AP_INFO("%u -> %02x%02x%02x\n", instance_p->eNB_id,
ie->value.choice.Global_ENB_ID.eNB_ID.choice.macroENB_ID.buf[0],
ie->value.choice.Global_ENB_ID.eNB_ID.choice.macroENB_ID.buf[1],
ie->value.choice.Global_ENB_ID.eNB_ID.choice.macroENB_ID.buf[2]);
asn1cSeqAdd(&out->protocolIEs.list, ie);
/* optional */
if (instance_p->eNB_name) {
ie = (S1AP_S1SetupRequestIEs_t *)calloc(1, sizeof(S1AP_S1SetupRequestIEs_t));
ie->id = S1AP_ProtocolIE_ID_id_eNBname;
ie->criticality = S1AP_Criticality_ignore;
ie->value.present = S1AP_S1SetupRequestIEs__value_PR_ENBname;
OCTET_STRING_fromBuf(&ie->value.choice.ENBname, instance_p->eNB_name,
strlen(instance_p->eNB_name));
asn1cSeqAdd(&out->protocolIEs.list, ie);
}
/* mandatory */
ie = (S1AP_S1SetupRequestIEs_t *)calloc(1, sizeof(S1AP_S1SetupRequestIEs_t));
ie->id = S1AP_ProtocolIE_ID_id_SupportedTAs;
ie->criticality = S1AP_Criticality_reject;
ie->value.present = S1AP_S1SetupRequestIEs__value_PR_SupportedTAs;
{
ta = (S1AP_SupportedTAs_Item_t *)calloc(1, sizeof(S1AP_SupportedTAs_Item_t));
INT16_TO_OCTET_STRING(instance_p->tac, &ta->tAC);
{
for (int i = 0; i < s1ap_mme_data_p->broadcast_plmn_num; ++i) {
plmn = (S1AP_PLMNidentity_t *)calloc(1, sizeof(S1AP_PLMNidentity_t));
MCC_MNC_TO_TBCD(instance_p->mcc[s1ap_mme_data_p->broadcast_plmn_index[i]],
instance_p->mnc[s1ap_mme_data_p->broadcast_plmn_index[i]],
instance_p->mnc_digit_length[s1ap_mme_data_p->broadcast_plmn_index[i]],
plmn);
asn1cSeqAdd(&ta->broadcastPLMNs.list, plmn);
}
}
asn1cSeqAdd(&ie->value.choice.SupportedTAs.list, ta);
}
asn1cSeqAdd(&out->protocolIEs.list, ie);
/* mandatory */
ie = (S1AP_S1SetupRequestIEs_t *)calloc(1, sizeof(S1AP_S1SetupRequestIEs_t));
ie->id = S1AP_ProtocolIE_ID_id_DefaultPagingDRX;
ie->criticality = S1AP_Criticality_ignore;
ie->value.present = S1AP_S1SetupRequestIEs__value_PR_PagingDRX;
ie->value.choice.PagingDRX = instance_p->default_drx;
asn1cSeqAdd(&out->protocolIEs.list, ie);
if (s1ap_eNB_encode_pdu(&pdu, &buffer, &len) < 0) {
S1AP_ERROR("Failed to encode S1 setup request\n");
return -1;
}
timer_kind = s1ap_mme_data_p->cnx_id;
timer_kind = timer_kind | S1AP_MMEIND;
timer_kind = timer_kind | S1_SETRSP_WAIT;
if( s1ap_timer_setup(instance_p->s1_setuprsp_wait_timer, 0, TASK_S1AP, instance_p->instance, timer_kind, TIMER_ONE_SHOT,
NULL, &s1ap_mme_data_p->timer_id) < 0 )
{
S1AP_ERROR("Timer Start NG(S1 Setup Response) : MME=%d\n",s1ap_mme_data_p->cnx_id);
}
s1ap_mme_data_p->s1_setupreq_cnt++;
/* Non UE-Associated signalling -> stream = 0 */
s1ap_eNB_itti_send_sctp_data_req(instance_p->instance, s1ap_mme_data_p->assoc_id, buffer, len, 0);
return ret;
}
static int s1ap_sctp_req(s1ap_eNB_instance_t *instance_p,
s1ap_eNB_mme_data_t *s1ap_mme_data_p)
{
MessageDef *message_p = NULL;
sctp_new_association_req_t *sctp_new_association_req_p = NULL;
if( instance_p == NULL )
{
S1AP_ERROR("Invalid instance_p\n");
return -1;
}
message_p = itti_alloc_new_message(TASK_S1AP, 0, SCTP_NEW_ASSOCIATION_REQ);
sctp_new_association_req_p = &message_p->ittiMsg.sctp_new_association_req;
sctp_new_association_req_p->port = S1AP_PORT_NUMBER;
sctp_new_association_req_p->ppid = S1AP_SCTP_PPID;
sctp_new_association_req_p->in_streams = instance_p->sctp_in_streams;
sctp_new_association_req_p->out_streams = instance_p->sctp_out_streams;
sctp_new_association_req_p->ulp_cnx_id = s1ap_mme_data_p->cnx_id;
if( s1ap_mme_data_p->mme_ip_address.ipv4 != 0 ) {
memcpy(&sctp_new_association_req_p->remote_address,
&s1ap_mme_data_p->mme_ip_address,
sizeof(net_ip_address_t));
if( instance_p->enb_ip_address.ipv4 != 0 ) {
memcpy(&sctp_new_association_req_p->local_address,
&instance_p->enb_ip_address,
sizeof(net_ip_address_t));
} else {
S1AP_ERROR("Invalid IP Address Format V4(MME):V6\n");
return -1;
}
} else {
memcpy(&sctp_new_association_req_p->remote_address,
&s1ap_mme_data_p->mme_ip_address,
sizeof(net_ip_address_t));
if( instance_p->enb_ip_address.ipv6 != 0 ) {
memcpy(&sctp_new_association_req_p->local_address,
&instance_p->enb_ip_address,
sizeof(net_ip_address_t));
} else {
S1AP_ERROR("Invalid IP Address Format V6(MME):V4\n");
return -1;
}
}
itti_send_msg_to_task(TASK_SCTP, instance_p->instance, message_p);
s1ap_mme_data_p->sctp_req_cnt++;
return 0;
}
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