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openairinterface5g/openair2/RRC/LTE/rrc_eNB_S1AP.c
T
Cedric Roux 4236ff2b3e nr: improve x2/rrc for ENDC 
This commit introduces several enhancements in X2AP and RRC to deal
with ENDC. The main goal is to deal with UE's on/off and with various
errors.

The following work is included:

    - DC prep and DC overall X2 timers
    - X2 messages for UE release and DC timers' timeout

Open problems:

    - what to do when the UE sends an scg Failure? This commit removes
      the UE. And this removal may not be correctly done
    - UE removal in the gNB's PHY layer (a next commit is coming,
      but it is hackish and will need a rework)
2020-09-22 11:57:31 +02:00

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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 rrc_eNB_S1AP.c
* \brief rrc S1AP procedures for eNB
* \author Navid Nikaein, Laurent Winckel, Sebastien ROUX, and Lionel GAUTHIER
* \date 2013-2016
* \version 1.0
* \company Eurecom
* \email: navid.nikaein@eurecom.fr
*/
#include "rrc_defs.h"
#include "rrc_extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#include "RRC/LTE/MESSAGES/asn1_msg.h"
#include "rrc_eNB_UE_context.h"
#include "rrc_eNB_S1AP.h"
#include "enb_config.h"
#include "common/ran_context.h"
#include "gtpv1u.h"
#include "s1ap_eNB.h"
#include "s1ap_eNB_defs.h"
#include "s1ap_eNB_management_procedures.h"
#include "s1ap_eNB_ue_context.h"
#include "asn1_conversions.h"
#include "intertask_interface.h"
#include "pdcp.h"
#include "pdcp_primitives.h"
#include "UTIL/OSA/osa_defs.h"
#include "msc.h"
#include "LTE_UERadioAccessCapabilityInformation.h"
#include "gtpv1u_eNB_task.h"
#include "RRC/LTE/rrc_eNB_GTPV1U.h"
#include "TLVDecoder.h"
#include "S1AP_NAS-PDU.h"
#include "flexran_agent_common_internal.h"
#include "executables/softmodem-common.h"
extern RAN_CONTEXT_t RC;
extern int
gtpv1u_delete_s1u_tunnel(
const instance_t instanceP,
const gtpv1u_enb_delete_tunnel_req_t *const req_pP);
/* Value to indicate an invalid UE initial id */
static const uint16_t UE_INITIAL_ID_INVALID = 0;
/* Masks for S1AP Encryption algorithms, EEA0 is always supported (not coded) */
static const uint16_t S1AP_ENCRYPTION_EEA1_MASK = 0x8000;
static const uint16_t S1AP_ENCRYPTION_EEA2_MASK = 0x4000;
/* Masks for S1AP Integrity algorithms, EIA0 is always supported (not coded) */
static const uint16_t S1AP_INTEGRITY_EIA1_MASK = 0x8000;
static const uint16_t S1AP_INTEGRITY_EIA2_MASK = 0x4000;
#define INTEGRITY_ALGORITHM_NONE LTE_SecurityAlgorithmConfig__integrityProtAlgorithm_eia0_v920
void extract_imsi(uint8_t *pdu_buf, uint32_t pdu_len, rrc_eNB_ue_context_t *ue_context_pP) {
/* Process NAS message locally to get the IMSI */
nas_message_t nas_msg;
memset(&nas_msg, 0, sizeof(nas_message_t));
int size = 0;
nas_message_security_header_t *header = &nas_msg.header;
/* Decode the first octet of the header (security header type or EPS
* bearer identity, and protocol discriminator) */
DECODE_U8((char *) pdu_buf, *(uint8_t *) (header), size);
/* Decode NAS message only if decodable*/
if (!(header->security_header_type <= SECURITY_HEADER_TYPE_INTEGRITY_PROTECTED
&& header->protocol_discriminator == EPS_MOBILITY_MANAGEMENT_MESSAGE
&& pdu_len > NAS_MESSAGE_SECURITY_HEADER_SIZE))
return;
/* Decode plain NAS message */
EMM_msg *e_msg = &nas_msg.plain.emm;
emm_msg_header_t *emm_header = &e_msg->header;
if (header->security_header_type != SECURITY_HEADER_TYPE_NOT_PROTECTED) {
/* Decode the message authentication code */
DECODE_U32((char *) pdu_buf+size, header->message_authentication_code, size);
/* Decode the sequence number */
DECODE_U8((char *) pdu_buf+size, header->sequence_number, size);
/* Decode the security header type and the protocol discriminator */
DECODE_U8(pdu_buf + size, *(uint8_t *)(emm_header), size);
/* Check that this is the right message */
if (emm_header->protocol_discriminator != EPS_MOBILITY_MANAGEMENT_MESSAGE)
return;
}
pdu_buf += size;
pdu_len -= size;
/* Check that buffer contains more than only the header */
if (pdu_len <= sizeof(emm_msg_header_t))
return;
/* First decode the EMM message header */
int e_head_size = 0;
/* Decode the message type */
DECODE_U8(pdu_buf + e_head_size, emm_header->message_type, e_head_size);
pdu_buf += e_head_size;
pdu_len -= e_head_size;
if (emm_header->message_type == IDENTITY_RESPONSE) {
decode_identity_response(&e_msg->identity_response, pdu_buf, pdu_len);
if (e_msg->identity_response.mobileidentity.imsi.typeofidentity == MOBILE_IDENTITY_IMSI) {
memcpy(&ue_context_pP->ue_context.imsi,
&e_msg->identity_response.mobileidentity.imsi,
sizeof(ImsiMobileIdentity_t));
}
} else if (emm_header->message_type == ATTACH_REQUEST) {
decode_attach_request(&e_msg->attach_request, pdu_buf, pdu_len);
if (e_msg->attach_request.oldgutiorimsi.imsi.typeofidentity == MOBILE_IDENTITY_IMSI) {
/* the following is very dirty, we cast (implicitly) from
* ImsiEpsMobileIdentity_t to ImsiMobileIdentity_t*/
memcpy(&ue_context_pP->ue_context.imsi,
&e_msg->attach_request.oldgutiorimsi.imsi,
sizeof(ImsiMobileIdentity_t));
}
}
}
//------------------------------------------------------------------------------
/*
* Get the UE S1 struct containing hashtables S1_id/UE_id.
* Is also used to set the S1_id of the UE, depending on inputs.
*/
struct rrc_ue_s1ap_ids_s *
rrc_eNB_S1AP_get_ue_ids(
eNB_RRC_INST *const rrc_instance_pP,
const uint16_t ue_initial_id,
const uint32_t eNB_ue_s1ap_id
)
//------------------------------------------------------------------------------
{
rrc_ue_s1ap_ids_t *result = NULL;
rrc_ue_s1ap_ids_t *result2 = NULL;
/*****************************/
instance_t instance = 0;
s1ap_eNB_instance_t *s1ap_eNB_instance_p = NULL;
s1ap_eNB_ue_context_t *ue_desc_p = NULL;
rrc_eNB_ue_context_t *ue_context_p = NULL;
/*****************************/
hashtable_rc_t h_rc;
if (ue_initial_id != UE_INITIAL_ID_INVALID) {
h_rc = hashtable_get(rrc_instance_pP->initial_id2_s1ap_ids, (hash_key_t)ue_initial_id, (void **)&result);
if (h_rc == HASH_TABLE_OK) {
if (eNB_ue_s1ap_id > 0) {
h_rc = hashtable_get(rrc_instance_pP->s1ap_id2_s1ap_ids, (hash_key_t)eNB_ue_s1ap_id, (void **)&result2);
if (h_rc != HASH_TABLE_OK) { // this case is equivalent to associate eNB_ue_s1ap_id and ue_initial_id
result2 = malloc(sizeof(*result2));
if (NULL != result2) {
*result2 = *result;
result2->eNB_ue_s1ap_id = eNB_ue_s1ap_id;
result->eNB_ue_s1ap_id = eNB_ue_s1ap_id;
h_rc = hashtable_insert(rrc_instance_pP->s1ap_id2_s1ap_ids, (hash_key_t)eNB_ue_s1ap_id, result2);
if (h_rc != HASH_TABLE_OK) {
LOG_E(S1AP, "[eNB %ld] Error while hashtable_insert in s1ap_id2_s1ap_ids eNB_ue_s1ap_id %"PRIu32"\n",
rrc_instance_pP - RC.rrc[0],
eNB_ue_s1ap_id);
}
}
} else { // here we should check that the association was done correctly
if ((result->ue_initial_id != result2->ue_initial_id) || (result->eNB_ue_s1ap_id != result2->eNB_ue_s1ap_id)) {
LOG_E(S1AP, "[eNB %ld] Error while hashtable_get, two rrc_ue_s1ap_ids_t that should be equal, are not:\n \
ue_initial_id 1 = %"PRIu16",\n \
ue_initial_id 2 = %"PRIu16",\n \
eNB_ue_s1ap_id 1 = %"PRIu32",\n \
eNB_ue_s1ap_id 2 = %"PRIu32"\n",
rrc_instance_pP - RC.rrc[0],
result->ue_initial_id,
result2->ue_initial_id,
result->eNB_ue_s1ap_id,
result2->eNB_ue_s1ap_id);
// Still return *result
}
}
} // end if if (eNB_ue_s1ap_id > 0)
} else { // end if (h_rc == HASH_TABLE_OK)
LOG_E(S1AP, "[eNB %ld] In hashtable_get, couldn't find in initial_id2_s1ap_ids ue_initial_id %"PRIu16"\n",
rrc_instance_pP - RC.rrc[0],
ue_initial_id);
return NULL;
/*
* At the moment this is written, this case shouldn't (cannot) happen and is equivalent to an error.
* One could try to find the struct instance based on s1ap_id2_s1ap_ids and eNB_ue_s1ap_id (if > 0),
* but this behavior is not expected at the moment.
*/
} // end else (h_rc != HASH_TABLE_OK)
} else { // end if (ue_initial_id != UE_INITIAL_ID_INVALID)
if (eNB_ue_s1ap_id > 0) {
h_rc = hashtable_get(rrc_instance_pP->s1ap_id2_s1ap_ids, (hash_key_t)eNB_ue_s1ap_id, (void **)&result);
if (h_rc != HASH_TABLE_OK) {
/*
* This case is uncommon, but can happen when:
* -> if the first NAS message was a Detach Request (non exhaustiv), the UE RRC context exist
* but is not associated with eNB_ue_s1ap_id
* -> ... (?)
*/
LOG_E(S1AP, "[eNB %ld] In hashtable_get, couldn't find in s1ap_id2_s1ap_ids eNB_ue_s1ap_id %"PRIu32", trying to find it through S1AP context\n",
rrc_instance_pP - RC.rrc[0],
eNB_ue_s1ap_id);
instance = ENB_MODULE_ID_TO_INSTANCE(rrc_instance_pP - RC.rrc[0]); // get eNB instance
s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance); // get s1ap_eNB_instance
if (s1ap_eNB_instance_p != NULL) {
ue_desc_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p, eNB_ue_s1ap_id); // get s1ap_eNB_ue_context
} else {
LOG_E(S1AP, "[eNB instance %d] Couldn't find the eNB S1AP context\n",
instance);
return NULL;
}
if (ue_desc_p != NULL) {
struct s1ap_eNB_ue_context_s *s1ap_ue_context_p = NULL;
if ((s1ap_ue_context_p = RB_REMOVE(s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head, ue_desc_p)) != NULL) {
LOG_E(RRC, "Removed UE context eNB_ue_s1ap_id %u\n", s1ap_ue_context_p->eNB_ue_s1ap_id);
s1ap_eNB_free_ue_context(s1ap_ue_context_p);
} else {
LOG_E(RRC, "Removing UE context eNB_ue_s1ap_id %u: did not find context\n",ue_desc_p->eNB_ue_s1ap_id);
}
return NULL; //skip the operation below to avoid loop
result = rrc_eNB_S1AP_get_ue_ids(rrc_instance_pP, ue_desc_p->ue_initial_id, eNB_ue_s1ap_id);
if (ue_desc_p->ue_initial_id != UE_INITIAL_ID_INVALID) {
result = rrc_eNB_S1AP_get_ue_ids(rrc_instance_pP, ue_desc_p->ue_initial_id, eNB_ue_s1ap_id);
if (result != NULL) {
ue_context_p = rrc_eNB_get_ue_context(RC.rrc[ENB_INSTANCE_TO_MODULE_ID(instance)], result->ue_rnti);
if ((ue_context_p != NULL) && (ue_context_p->ue_context.eNB_ue_s1ap_id == 0)) {
ue_context_p->ue_context.eNB_ue_s1ap_id = eNB_ue_s1ap_id;
} else {
LOG_E(RRC, "[eNB %ld] Incoherence between RRC context and S1AP context (%d != %d) for UE RNTI %d or UE RRC context doesn't exist\n",
rrc_instance_pP - RC.rrc[0],
(ue_context_p==NULL)?99999:ue_context_p->ue_context.eNB_ue_s1ap_id,
eNB_ue_s1ap_id,
result->ue_rnti);
}
}
} else {
LOG_E(S1AP, "[eNB %ld] S1AP context found but ue_initial_id is invalid (0)\n", rrc_instance_pP - RC.rrc[0]);
return NULL;
}
} else {
LOG_E(S1AP, "[eNB %ld] In hashtable_get, couldn't find in s1ap_id2_s1ap_ids eNB_ue_s1ap_id %"PRIu32", because ue_initial_id is invalid in S1AP context\n",
rrc_instance_pP - RC.rrc[0],
eNB_ue_s1ap_id);
return NULL;
}
} // end if (h_rc != HASH_TABLE_OK)
} // end if (eNB_ue_s1ap_id > 0)
} // end else (ue_initial_id == UE_INITIAL_ID_INVALID)
return result;
}
//------------------------------------------------------------------------------
/*
* Remove UE ids (ue_initial_id and S1_id) from hashtables.
*/
void
rrc_eNB_S1AP_remove_ue_ids(
eNB_RRC_INST *const rrc_instance_pP,
struct rrc_ue_s1ap_ids_s *const ue_ids_pP
)
//------------------------------------------------------------------------------
{
hashtable_rc_t h_rc;
if (rrc_instance_pP == NULL) {
LOG_E(RRC, "Bad RRC instance\n");
return;
}
if (ue_ids_pP == NULL) {
LOG_E(RRC, "Trying to free a NULL S1AP UE IDs\n");
return;
}
const uint16_t ue_initial_id = ue_ids_pP->ue_initial_id;
const uint32_t eNB_ue_s1ap_id = ue_ids_pP->eNB_ue_s1ap_id;
if (eNB_ue_s1ap_id > 0) {
h_rc = hashtable_remove(rrc_instance_pP->s1ap_id2_s1ap_ids, (hash_key_t)eNB_ue_s1ap_id);
if (h_rc != HASH_TABLE_OK) {
LOG_W(RRC, "S1AP Did not find entry in hashtable s1ap_id2_s1ap_ids for eNB_ue_s1ap_id %u\n", eNB_ue_s1ap_id);
} else {
LOG_W(RRC, "S1AP removed entry in hashtable s1ap_id2_s1ap_ids for eNB_ue_s1ap_id %u\n", eNB_ue_s1ap_id);
}
}
if (ue_initial_id != UE_INITIAL_ID_INVALID) {
h_rc = hashtable_remove(rrc_instance_pP->initial_id2_s1ap_ids, (hash_key_t)ue_initial_id);
if (h_rc != HASH_TABLE_OK) {
LOG_W(RRC, "S1AP Did not find entry in hashtable initial_id2_s1ap_ids for ue_initial_id %u\n", ue_initial_id);
} else {
LOG_W(RRC, "S1AP removed entry in hashtable initial_id2_s1ap_ids for ue_initial_id %u\n", ue_initial_id);
}
}
}
/*! \fn uint16_t get_next_ue_initial_id(uint8_t mod_id)
*\brief provide an UE initial ID for S1AP initial communication.
*\param mod_id Instance ID of eNB.
*\return the UE initial ID.
*/
//------------------------------------------------------------------------------
static uint16_t
get_next_ue_initial_id(
const module_id_t mod_id
)
//------------------------------------------------------------------------------
{
static uint16_t ue_initial_id[NUMBER_OF_eNB_MAX];
ue_initial_id[mod_id]++;
/* Never use UE_INITIAL_ID_INVALID this is the invalid id! */
if (ue_initial_id[mod_id] == UE_INITIAL_ID_INVALID) {
ue_initial_id[mod_id]++;
}
return ue_initial_id[mod_id];
}
/*! \fn uint8_t get_UE_index_from_s1ap_ids(uint8_t mod_id, uint16_t ue_initial_id, uint32_t eNB_ue_s1ap_id)
*\brief retrieve UE index in the eNB from the UE initial ID if not equal to UE_INDEX_INVALID or
*\brief from the eNB_ue_s1ap_id previously transmitted by S1AP.
*\param mod_id Instance ID of eNB.
*\param ue_initial_id The UE initial ID sent to S1AP.
*\param eNB_ue_s1ap_id The value sent by S1AP.
*\return the UE index or UE_INDEX_INVALID if not found.
*/
static struct rrc_eNB_ue_context_s *
rrc_eNB_get_ue_context_from_s1ap_ids(
const instance_t instanceP,
const uint16_t ue_initial_idP,
const uint32_t eNB_ue_s1ap_idP
) {
rrc_ue_s1ap_ids_t *temp = NULL;
temp = rrc_eNB_S1AP_get_ue_ids(RC.rrc[ENB_INSTANCE_TO_MODULE_ID(instanceP)], ue_initial_idP, eNB_ue_s1ap_idP);
if (temp != NULL) {
return rrc_eNB_get_ue_context(RC.rrc[ENB_INSTANCE_TO_MODULE_ID(instanceP)], temp->ue_rnti);
}
return NULL;
}
/*! \fn e_SecurityAlgorithmConfig__cipheringAlgorithm rrc_eNB_select_ciphering(uint16_t algorithms)
*\brief analyze available encryption algorithms bit mask and return the relevant one.
*\param algorithms The bit mask of available algorithms received from S1AP.
*\return the selected algorithm.
*/
static LTE_CipheringAlgorithm_r12_t rrc_eNB_select_ciphering(uint16_t algorithms) {
//#warning "Forced return SecurityAlgorithmConfig__cipheringAlgorithm_eea0, to be deleted in future"
return LTE_CipheringAlgorithm_r12_eea0;
if (algorithms & S1AP_ENCRYPTION_EEA2_MASK) {
return LTE_CipheringAlgorithm_r12_eea2;
}
if (algorithms & S1AP_ENCRYPTION_EEA1_MASK) {
return LTE_CipheringAlgorithm_r12_eea1;
}
return LTE_CipheringAlgorithm_r12_eea0;
}
/*! \fn e_SecurityAlgorithmConfig__integrityProtAlgorithm rrc_eNB_select_integrity(uint16_t algorithms)
*\brief analyze available integrity algorithms bit mask and return the relevant one.
*\param algorithms The bit mask of available algorithms received from S1AP.
*\return the selected algorithm.
*/
static e_LTE_SecurityAlgorithmConfig__integrityProtAlgorithm rrc_eNB_select_integrity(uint16_t algorithms) {
if (algorithms & S1AP_INTEGRITY_EIA2_MASK) {
return LTE_SecurityAlgorithmConfig__integrityProtAlgorithm_eia2;
}
if (algorithms & S1AP_INTEGRITY_EIA1_MASK) {
return LTE_SecurityAlgorithmConfig__integrityProtAlgorithm_eia1;
}
return INTEGRITY_ALGORITHM_NONE;
}
/*! \fn int rrc_eNB_process_security (uint8_t mod_id, uint8_t ue_index, security_capabilities_t *security_capabilities)
*\brief save and analyze available security algorithms bit mask and select relevant ones.
*\param mod_id Instance ID of eNB.
*\param ue_index Instance ID of UE in the eNB.
*\param security_capabilities The security capabilities received from S1AP.
*\return TRUE if at least one algorithm has been changed else FALSE.
*/
int
rrc_eNB_process_security(
const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
security_capabilities_t *security_capabilities_pP
) {
boolean_t changed = FALSE;
LTE_CipheringAlgorithm_r12_t cipheringAlgorithm;
e_LTE_SecurityAlgorithmConfig__integrityProtAlgorithm integrityProtAlgorithm;
/* Save security parameters */
ue_context_pP->ue_context.security_capabilities = *security_capabilities_pP;
// translation
LOG_D(RRC,
"[eNB %d] NAS security_capabilities.encryption_algorithms %u AS ciphering_algorithm %lu NAS security_capabilities.integrity_algorithms %u AS integrity_algorithm %u\n",
ctxt_pP->module_id,
ue_context_pP->ue_context.security_capabilities.encryption_algorithms,
(unsigned long)ue_context_pP->ue_context.ciphering_algorithm,
ue_context_pP->ue_context.security_capabilities.integrity_algorithms,
ue_context_pP->ue_context.integrity_algorithm);
/* Select relevant algorithms */
cipheringAlgorithm = rrc_eNB_select_ciphering (ue_context_pP->ue_context.security_capabilities.encryption_algorithms);
if (ue_context_pP->ue_context.ciphering_algorithm != cipheringAlgorithm) {
ue_context_pP->ue_context.ciphering_algorithm = cipheringAlgorithm;
changed = TRUE;
}
integrityProtAlgorithm = rrc_eNB_select_integrity (ue_context_pP->ue_context.security_capabilities.integrity_algorithms);
if (ue_context_pP->ue_context.integrity_algorithm != integrityProtAlgorithm) {
ue_context_pP->ue_context.integrity_algorithm = integrityProtAlgorithm;
changed = TRUE;
}
LOG_I (RRC, "[eNB %d][UE %x] Selected security algorithms (%p): %lx, %x, %s\n",
ctxt_pP->module_id,
ue_context_pP->ue_context.rnti,
security_capabilities_pP,
(unsigned long)cipheringAlgorithm,
integrityProtAlgorithm,
changed ? "changed" : "same");
return changed;
}
/*! \fn void process_eNB_security_key (const protocol_ctxt_t* const ctxt_pP, eNB_RRC_UE_t * const ue_context_pP, uint8_t *security_key)
*\brief save security key.
*\param ctxt_pP Running context.
*\param ue_context_pP UE context.
*\param security_key_pP The security key received from S1AP.
*/
//------------------------------------------------------------------------------
void process_eNB_security_key (
const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
uint8_t *security_key_pP
)
//------------------------------------------------------------------------------
{
char ascii_buffer[65];
uint8_t i;
/* Saves the security key */
memcpy (ue_context_pP->ue_context.kenb, security_key_pP, SECURITY_KEY_LENGTH);
memset (ue_context_pP->ue_context.nh, 0, SECURITY_KEY_LENGTH);
ue_context_pP->ue_context.nh_ncc = -1;
for (i = 0; i < 32; i++) {
sprintf(&ascii_buffer[2 * i], "%02X", ue_context_pP->ue_context.kenb[i]);
}
ascii_buffer[2 * i] = '\0';
LOG_I (RRC, "[eNB %d][UE %x] Saved security key %s\n", ctxt_pP->module_id, ue_context_pP->ue_context.rnti, ascii_buffer);
}
//------------------------------------------------------------------------------
void
rrc_pdcp_config_security(
const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
const uint8_t send_security_mode_command
)
//------------------------------------------------------------------------------
{
LTE_SRB_ToAddModList_t *SRB_configList = ue_context_pP->ue_context.SRB_configList;
uint8_t *kRRCenc = NULL;
uint8_t *kRRCint = NULL;
uint8_t *kUPenc = NULL;
pdcp_t *pdcp_p = NULL;
static int print_keys= 1;
hashtable_rc_t h_rc;
hash_key_t key;
/* Derive the keys from kenb */
if (SRB_configList != NULL) {
derive_key_up_enc(ue_context_pP->ue_context.ciphering_algorithm,
ue_context_pP->ue_context.kenb,
&kUPenc);
}
derive_key_rrc_enc(ue_context_pP->ue_context.ciphering_algorithm,
ue_context_pP->ue_context.kenb,
&kRRCenc);
derive_key_rrc_int(ue_context_pP->ue_context.integrity_algorithm,
ue_context_pP->ue_context.kenb,
&kRRCint);
if (!IS_SOFTMODEM_IQPLAYER) {
SET_LOG_DUMP(DEBUG_SECURITY) ;
}
if ( LOG_DUMPFLAG( DEBUG_SECURITY ) ) {
if (print_keys ==1 ) {
print_keys =0;
LOG_DUMPMSG(RRC, DEBUG_SECURITY, ue_context_pP->ue_context.kenb, 32,"\nKeNB:" );
LOG_DUMPMSG(RRC, DEBUG_SECURITY, kRRCenc, 32,"\nKRRCenc:" );
LOG_DUMPMSG(RRC, DEBUG_SECURITY, kRRCint, 32,"\nKRRCint:" );
}
}
key = PDCP_COLL_KEY_VALUE(ctxt_pP->module_id, ctxt_pP->rnti, ctxt_pP->enb_flag, DCCH, SRB_FLAG_YES);
h_rc = hashtable_get(pdcp_coll_p, key, (void **)&pdcp_p);
if (h_rc == HASH_TABLE_OK) {
pdcp_config_set_security(
ctxt_pP,
pdcp_p,
DCCH,
DCCH+2,
(send_security_mode_command == TRUE) ?
0 | (ue_context_pP->ue_context.integrity_algorithm << 4) :
(ue_context_pP->ue_context.ciphering_algorithm ) |
(ue_context_pP->ue_context.integrity_algorithm << 4),
kRRCenc,
kRRCint,
kUPenc);
} else {
LOG_E(RRC,
PROTOCOL_RRC_CTXT_UE_FMT"Could not get PDCP instance for SRB DCCH %u\n",
PROTOCOL_RRC_CTXT_UE_ARGS(ctxt_pP),
DCCH);
}
}
//------------------------------------------------------------------------------
void
rrc_eNB_send_S1AP_INITIAL_CONTEXT_SETUP_RESP(
const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP
)
//------------------------------------------------------------------------------
{
MessageDef *msg_p = NULL;
int e_rab;
int e_rabs_done = 0;
int e_rabs_failed = 0;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_INITIAL_CONTEXT_SETUP_RESP);
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
for (e_rab = 0; e_rab < ue_context_pP->ue_context.nb_of_e_rabs; e_rab++) {
if (ue_context_pP->ue_context.e_rab[e_rab].status == E_RAB_STATUS_DONE) {
e_rabs_done++;
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).e_rabs[e_rab].e_rab_id = ue_context_pP->ue_context.e_rab[e_rab].param.e_rab_id;
// TODO add other information from S1-U when it will be integrated
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).e_rabs[e_rab].gtp_teid = ue_context_pP->ue_context.enb_gtp_teid[e_rab];
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).e_rabs[e_rab].eNB_addr = ue_context_pP->ue_context.enb_gtp_addrs[e_rab];
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).e_rabs[e_rab].eNB_addr.length = 4;
ue_context_pP->ue_context.e_rab[e_rab].status = E_RAB_STATUS_ESTABLISHED;
} else {
e_rabs_failed++;
ue_context_pP->ue_context.e_rab[e_rab].status = E_RAB_STATUS_FAILED;
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).e_rabs_failed[e_rab].e_rab_id = ue_context_pP->ue_context.e_rab[e_rab].param.e_rab_id;
// TODO add cause when it will be integrated
}
}
MSC_LOG_TX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
(const char *)&S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p),
sizeof(s1ap_initial_context_setup_resp_t),
MSC_AS_TIME_FMT" INITIAL_CONTEXT_SETUP_RESP UE %X eNB_ue_s1ap_id %u e_rabs:%u succ %u fail",
MSC_AS_TIME_ARGS(ctxt_pP),
ue_context_pP->ue_id_rnti,
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).eNB_ue_s1ap_id,
e_rabs_done, e_rabs_failed);
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).nb_of_e_rabs = e_rabs_done;
S1AP_INITIAL_CONTEXT_SETUP_RESP (msg_p).nb_of_e_rabs_failed = e_rabs_failed;
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
}
//------------------------------------------------------------------------------
void
rrc_eNB_send_S1AP_UPLINK_NAS(
const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
LTE_UL_DCCH_Message_t *const ul_dcch_msg
)
//------------------------------------------------------------------------------
{
{
LTE_ULInformationTransfer_t *ulInformationTransfer = &ul_dcch_msg->message.choice.c1.choice.ulInformationTransfer;
if ((ulInformationTransfer->criticalExtensions.present == LTE_ULInformationTransfer__criticalExtensions_PR_c1)
&& (ulInformationTransfer->criticalExtensions.choice.c1.present
== LTE_ULInformationTransfer__criticalExtensions__c1_PR_ulInformationTransfer_r8)
&& (ulInformationTransfer->criticalExtensions.choice.c1.choice.ulInformationTransfer_r8.dedicatedInfoType.present
== LTE_ULInformationTransfer_r8_IEs__dedicatedInfoType_PR_dedicatedInfoNAS)) {
/* This message hold a dedicated info NAS payload, forward it to NAS */
struct LTE_ULInformationTransfer_r8_IEs__dedicatedInfoType *dedicatedInfoType =
&ulInformationTransfer->criticalExtensions.choice.c1.choice.ulInformationTransfer_r8.dedicatedInfoType;
uint32_t pdu_length;
uint8_t *pdu_buffer;
MessageDef *msg_p;
pdu_length = dedicatedInfoType->choice.dedicatedInfoNAS.size;
pdu_buffer = dedicatedInfoType->choice.dedicatedInfoNAS.buf;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_UPLINK_NAS);
S1AP_UPLINK_NAS (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
S1AP_UPLINK_NAS (msg_p).nas_pdu.length = pdu_length;
S1AP_UPLINK_NAS (msg_p).nas_pdu.buffer = pdu_buffer;
extract_imsi(S1AP_UPLINK_NAS (msg_p).nas_pdu.buffer,
S1AP_UPLINK_NAS (msg_p).nas_pdu.length,
ue_context_pP);
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
}
}
}
//------------------------------------------------------------------------------
void rrc_eNB_send_S1AP_UE_CAPABILITIES_IND(
const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
LTE_UL_DCCH_Message_t *ul_dcch_msg
)
//------------------------------------------------------------------------------
{
LTE_UECapabilityInformation_t *ueCapabilityInformation = &ul_dcch_msg->message.choice.c1.choice.ueCapabilityInformation;
/* 4096 is arbitrary, should be big enough */
unsigned char buf[4096];
unsigned char *buf2;
LTE_UERadioAccessCapabilityInformation_t rac;
if (ueCapabilityInformation->criticalExtensions.present != LTE_UECapabilityInformation__criticalExtensions_PR_c1
|| ueCapabilityInformation->criticalExtensions.choice.c1.present != LTE_UECapabilityInformation__criticalExtensions__c1_PR_ueCapabilityInformation_r8) {
LOG_E(RRC, "[eNB %d][UE %x] bad UE capabilities\n", ctxt_pP->module_id, ue_context_pP->ue_context.rnti);
return;
}
asn_enc_rval_t ret = uper_encode_to_buffer(&asn_DEF_LTE_UECapabilityInformation, NULL, ueCapabilityInformation, buf, 4096);
if (ret.encoded == -1) abort();
memset(&rac, 0, sizeof(LTE_UERadioAccessCapabilityInformation_t));
rac.criticalExtensions.present = LTE_UERadioAccessCapabilityInformation__criticalExtensions_PR_c1;
rac.criticalExtensions.choice.c1.present = LTE_UERadioAccessCapabilityInformation__criticalExtensions__c1_PR_ueRadioAccessCapabilityInformation_r8;
rac.criticalExtensions.choice.c1.choice.ueRadioAccessCapabilityInformation_r8.ue_RadioAccessCapabilityInfo.buf = buf;
rac.criticalExtensions.choice.c1.choice.ueRadioAccessCapabilityInformation_r8.ue_RadioAccessCapabilityInfo.size = (ret.encoded+7)/8;
rac.criticalExtensions.choice.c1.choice.ueRadioAccessCapabilityInformation_r8.nonCriticalExtension = NULL;
/* 8192 is arbitrary, should be big enough */
buf2 = malloc16(8192);
if (buf2 == NULL) abort();
ret = uper_encode_to_buffer(&asn_DEF_LTE_UERadioAccessCapabilityInformation, NULL, &rac, buf2, 8192);
if (ret.encoded == -1) abort();
MessageDef *msg_p;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_UE_CAPABILITIES_IND);
S1AP_UE_CAPABILITIES_IND (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
S1AP_UE_CAPABILITIES_IND (msg_p).ue_radio_cap.length = (ret.encoded+7)/8;
S1AP_UE_CAPABILITIES_IND (msg_p).ue_radio_cap.buffer = buf2;
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
}
//------------------------------------------------------------------------------
/*
* Initial UE NAS message on S1AP.
*/
void
rrc_eNB_send_S1AP_NAS_FIRST_REQ(
const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
LTE_RRCConnectionSetupComplete_r8_IEs_t *rrcConnectionSetupComplete
)
//------------------------------------------------------------------------------
{
eNB_RRC_INST *rrc = RC.rrc[ctxt_pP->module_id];
{
MessageDef *message_p = NULL;
rrc_ue_s1ap_ids_t *rrc_ue_s1ap_ids_p = NULL;
hashtable_rc_t h_rc;
message_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_NAS_FIRST_REQ);
memset(&message_p->ittiMsg.s1ap_nas_first_req, 0, sizeof(s1ap_nas_first_req_t));
ue_context_pP->ue_context.ue_initial_id = get_next_ue_initial_id(ctxt_pP->module_id);
S1AP_NAS_FIRST_REQ(message_p).ue_initial_id = ue_context_pP->ue_context.ue_initial_id;
rrc_ue_s1ap_ids_p = malloc(sizeof(*rrc_ue_s1ap_ids_p));
rrc_ue_s1ap_ids_p->ue_initial_id = ue_context_pP->ue_context.ue_initial_id;
rrc_ue_s1ap_ids_p->eNB_ue_s1ap_id = UE_INITIAL_ID_INVALID;
rrc_ue_s1ap_ids_p->ue_rnti = ctxt_pP->rnti;
h_rc = hashtable_insert(RC.rrc[ctxt_pP->module_id]->initial_id2_s1ap_ids,
(hash_key_t)ue_context_pP->ue_context.ue_initial_id,
rrc_ue_s1ap_ids_p);
if (h_rc != HASH_TABLE_OK) {
LOG_E(S1AP, "[eNB %d] Error while hashtable_insert in initial_id2_s1ap_ids ue_initial_id %u\n",
ctxt_pP->module_id,
ue_context_pP->ue_context.ue_initial_id);
}
/* Assume that cause is coded in the same way in RRC and S1ap, just check that the value is in S1ap range */
AssertFatal(ue_context_pP->ue_context.establishment_cause < RRC_CAUSE_LAST,
"Establishment cause invalid (%jd/%d) for eNB %d!",
ue_context_pP->ue_context.establishment_cause,
RRC_CAUSE_LAST,
ctxt_pP->module_id);
S1AP_NAS_FIRST_REQ (message_p).establishment_cause = ue_context_pP->ue_context.establishment_cause;
/* Forward NAS message */
S1AP_NAS_FIRST_REQ (message_p).nas_pdu.buffer = rrcConnectionSetupComplete->dedicatedInfoNAS.buf;
S1AP_NAS_FIRST_REQ (message_p).nas_pdu.length = rrcConnectionSetupComplete->dedicatedInfoNAS.size;
extract_imsi(S1AP_NAS_FIRST_REQ (message_p).nas_pdu.buffer,
S1AP_NAS_FIRST_REQ (message_p).nas_pdu.length,
ue_context_pP);
/* Fill UE identities with available information */
{
S1AP_NAS_FIRST_REQ (message_p).ue_identity.presenceMask = UE_IDENTITIES_NONE;
if (ue_context_pP->ue_context.Initialue_identity_s_TMSI.presence) {
/* Fill s-TMSI */
UE_S_TMSI *s_TMSI = &ue_context_pP->ue_context.Initialue_identity_s_TMSI;
S1AP_NAS_FIRST_REQ (message_p).ue_identity.presenceMask |= UE_IDENTITIES_s_tmsi;
S1AP_NAS_FIRST_REQ (message_p).ue_identity.s_tmsi.mme_code = s_TMSI->mme_code;
S1AP_NAS_FIRST_REQ (message_p).ue_identity.s_tmsi.m_tmsi = s_TMSI->m_tmsi;
LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ with s_TMSI: MME code %u M-TMSI %u ue %x\n",
ctxt_pP->module_id,
S1AP_NAS_FIRST_REQ (message_p).ue_identity.s_tmsi.mme_code,
S1AP_NAS_FIRST_REQ (message_p).ue_identity.s_tmsi.m_tmsi,
ue_context_pP->ue_context.rnti);
} // end if S-TMSI presence
/* selected_plmn_identity: IE is 1-based, convert to 0-based (C array) */
int selected_plmn_identity = rrcConnectionSetupComplete->selectedPLMN_Identity - 1;
S1AP_NAS_FIRST_REQ(message_p).selected_plmn_identity = selected_plmn_identity;
if (rrcConnectionSetupComplete->registeredMME != NULL) {
/* Fill GUMMEI */
struct LTE_RegisteredMME *r_mme = rrcConnectionSetupComplete->registeredMME;
S1AP_NAS_FIRST_REQ (message_p).ue_identity.presenceMask |= UE_IDENTITIES_gummei;
if (r_mme->plmn_Identity != NULL) {
if ((r_mme->plmn_Identity->mcc != NULL) && (r_mme->plmn_Identity->mcc->list.count > 0)) {
/* Use first indicated PLMN MCC if it is defined */
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mcc = *r_mme->plmn_Identity->mcc->list.array[selected_plmn_identity];
LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MCC %u ue %x\n",
ctxt_pP->module_id,
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mcc,
ue_context_pP->ue_context.rnti);
}
if (r_mme->plmn_Identity->mnc.list.count > 0) {
/* Use first indicated PLMN MNC if it is defined */
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc = *r_mme->plmn_Identity->mnc.list.array[selected_plmn_identity];
LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI MNC %u ue %x\n",
ctxt_pP->module_id,
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc,
ue_context_pP->ue_context.rnti);
}
} else { // end if plmn_Identity != NULL
S1AP_NAS_FIRST_REQ(message_p).ue_identity.gummei.mcc = rrc->configuration.mcc[selected_plmn_identity];
S1AP_NAS_FIRST_REQ(message_p).ue_identity.gummei.mnc = rrc->configuration.mnc[selected_plmn_identity];
S1AP_NAS_FIRST_REQ(message_p).ue_identity.gummei.mnc_len = rrc->configuration.mnc_digit_length[selected_plmn_identity];
} // end else (plmn_Identity == NULL)
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mme_code = BIT_STRING_to_uint8 (&r_mme->mmec);
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mme_group_id = BIT_STRING_to_uint16 (&r_mme->mmegi);
ue_context_pP->ue_context.ue_gummei.mcc = S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mcc;
ue_context_pP->ue_context.ue_gummei.mnc = S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc;
ue_context_pP->ue_context.ue_gummei.mnc_len = S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mnc_len;
ue_context_pP->ue_context.ue_gummei.mme_code = S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mme_code;
ue_context_pP->ue_context.ue_gummei.mme_group_id = S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mme_group_id;
MSC_LOG_TX_MESSAGE(MSC_S1AP_ENB,
MSC_S1AP_MME,
(const char *)&message_p->ittiMsg.s1ap_nas_first_req,
sizeof(s1ap_nas_first_req_t),
MSC_AS_TIME_FMT" S1AP_NAS_FIRST_REQ eNB %u UE %x",
MSC_AS_TIME_ARGS(ctxt_pP),
ctxt_pP->module_id,
ctxt_pP->rnti);
LOG_I(S1AP, "[eNB %d] Build S1AP_NAS_FIRST_REQ adding in s_TMSI: GUMMEI mme_code %u mme_group_id %u ue %x\n",
ctxt_pP->module_id,
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mme_code,
S1AP_NAS_FIRST_REQ (message_p).ue_identity.gummei.mme_group_id,
ue_context_pP->ue_context.rnti);
} // end if MME info present
} // end "Fill UE identities with available information" sub-part
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, message_p);
}
}
//------------------------------------------------------------------------------
int
rrc_eNB_process_S1AP_DOWNLINK_NAS(
MessageDef *msg_p,
const char *msg_name,
instance_t instance,
mui_t *rrc_eNB_mui
)
//------------------------------------------------------------------------------
{
uint16_t ue_initial_id;
uint32_t eNB_ue_s1ap_id;
uint32_t length;
uint8_t *buffer;
uint8_t srb_id;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
memset(&ctxt, 0, sizeof(protocol_ctxt_t));
ue_initial_id = S1AP_DOWNLINK_NAS (msg_p).ue_initial_id;
eNB_ue_s1ap_id = S1AP_DOWNLINK_NAS (msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, ue_initial_id, eNB_ue_s1ap_id);
LOG_I(RRC, "[eNB %d] Received %s: ue_initial_id %d, eNB_ue_s1ap_id %d\n",
instance,
msg_name,
ue_initial_id,
eNB_ue_s1ap_id);
if (ue_context_p == NULL) {
MSC_LOG_RX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
NULL,
0,
MSC_AS_TIME_FMT" DOWNLINK-NAS UE initial id %u eNB_ue_s1ap_id %u",
0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
ue_initial_id,
eNB_ue_s1ap_id);
/* Can not associate this message to an UE index, send a failure to S1AP and discard it! */
MessageDef *msg_fail_p;
LOG_W(RRC, "[eNB %d] In S1AP_DOWNLINK_NAS: unknown UE from S1AP ids (%d, %d)\n", instance, ue_initial_id, eNB_ue_s1ap_id);
msg_fail_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_NAS_NON_DELIVERY_IND);
S1AP_NAS_NON_DELIVERY_IND (msg_fail_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
S1AP_NAS_NON_DELIVERY_IND (msg_fail_p).nas_pdu.length = S1AP_DOWNLINK_NAS (msg_p).nas_pdu.length;
S1AP_NAS_NON_DELIVERY_IND (msg_fail_p).nas_pdu.buffer = S1AP_DOWNLINK_NAS (msg_p).nas_pdu.buffer;
// TODO add failure cause when defined!
MSC_LOG_TX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
(const char *)NULL,
0,
MSC_AS_TIME_FMT" S1AP_NAS_NON_DELIVERY_IND UE initial id %u eNB_ue_s1ap_id %u (ue ctxt !found)",
0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
ue_initial_id,
eNB_ue_s1ap_id);
itti_send_msg_to_task (TASK_S1AP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
srb_id = ue_context_p->ue_context.Srb2.Srb_info.Srb_id;
/* Is it the first income from S1AP ? */
if (ue_context_p->ue_context.eNB_ue_s1ap_id == 0) {
ue_context_p->ue_context.eNB_ue_s1ap_id = S1AP_DOWNLINK_NAS (msg_p).eNB_ue_s1ap_id;
}
MSC_LOG_RX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
(const char *)NULL,
0,
MSC_AS_TIME_FMT" DOWNLINK-NAS UE initial id %u eNB_ue_s1ap_id %u",
0,0,//MSC_AS_TIME_ARGS(ctxt_pP),
ue_initial_id,
S1AP_DOWNLINK_NAS (msg_p).eNB_ue_s1ap_id);
/* Create message for PDCP (DLInformationTransfer_t) */
length = do_DLInformationTransfer (
instance,
&buffer,
rrc_eNB_get_next_transaction_identifier (instance),
S1AP_DOWNLINK_NAS (msg_p).nas_pdu.length,
S1AP_DOWNLINK_NAS (msg_p).nas_pdu.buffer);
LOG_DUMPMSG(RRC,DEBUG_RRC,buffer,length,"[MSG] RRC DL Information Transfer\n");
/*
* switch UL or DL NAS message without RRC piggybacked to SRB2 if active.
*/
/* Transfer data to PDCP */
rrc_data_req (
&ctxt,
srb_id,
(*rrc_eNB_mui)++,
SDU_CONFIRM_NO,
length,
buffer,
PDCP_TRANSMISSION_MODE_CONTROL);
return (0);
}
}
/*------------------------------------------------------------------------------*/
int rrc_eNB_process_S1AP_INITIAL_CONTEXT_SETUP_REQ(MessageDef *msg_p, const char *msg_name, instance_t instance) {
uint16_t ue_initial_id;
uint32_t eNB_ue_s1ap_id;
//MessageDef *message_gtpv1u_p = NULL;
gtpv1u_enb_create_tunnel_req_t create_tunnel_req;
gtpv1u_enb_create_tunnel_resp_t create_tunnel_resp;
uint8_t inde_list[NB_RB_MAX - 3]= {0};
int ret;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
ue_initial_id = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).ue_initial_id;
eNB_ue_s1ap_id = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, ue_initial_id, eNB_ue_s1ap_id);
LOG_I(RRC, "[eNB %d] Received %s: ue_initial_id %d, eNB_ue_s1ap_id %d, nb_of_e_rabs %d\n",
instance, msg_name, ue_initial_id, eNB_ue_s1ap_id, S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).nb_of_e_rabs);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to S1AP and discard it! */
MessageDef *msg_fail_p = NULL;
LOG_W(RRC, "[eNB %d] In S1AP_INITIAL_CONTEXT_SETUP_REQ: unknown UE from S1AP ids (%d, %d)\n", instance, ue_initial_id, eNB_ue_s1ap_id);
msg_fail_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_INITIAL_CONTEXT_SETUP_FAIL);
S1AP_INITIAL_CONTEXT_SETUP_FAIL (msg_fail_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task (TASK_S1AP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
ue_context_p->ue_context.eNB_ue_s1ap_id = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).eNB_ue_s1ap_id;
ue_context_p->ue_context.mme_ue_s1ap_id = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).mme_ue_s1ap_id;
/* Save e RAB information for later */
{
int i;
memset(&create_tunnel_req, 0, sizeof(create_tunnel_req));
ue_context_p->ue_context.nb_of_e_rabs = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).nb_of_e_rabs;
for (i = 0; i < ue_context_p->ue_context.nb_of_e_rabs; i++) {
ue_context_p->ue_context.e_rab[i].status = E_RAB_STATUS_NEW;
ue_context_p->ue_context.e_rab[i].param = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).e_rab_param[i];
create_tunnel_req.eps_bearer_id[i] = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).e_rab_param[i].e_rab_id;
create_tunnel_req.sgw_S1u_teid[i] = S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).e_rab_param[i].gtp_teid;
memcpy(&create_tunnel_req.sgw_addr[i],
&S1AP_INITIAL_CONTEXT_SETUP_REQ (msg_p).e_rab_param[i].sgw_addr,
sizeof(transport_layer_addr_t));
inde_list[create_tunnel_req.num_tunnels]= i;
create_tunnel_req.num_tunnels++;
}
create_tunnel_req.rnti = ue_context_p->ue_context.rnti; // warning put zero above
// create_tunnel_req.num_tunnels = i;
ret = gtpv1u_create_s1u_tunnel(
instance,
&create_tunnel_req,
&create_tunnel_resp);
if ( ret != 0 ) {
LOG_E(RRC,"rrc_eNB_process_S1AP_INITIAL_CONTEXT_SETUP_REQ : gtpv1u_create_s1u_tunnel failed,start to release UE %x\n",ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ue_release_timer_s1 = 1;
ue_context_p->ue_context.ue_release_timer_thres_s1 = 100;
ue_context_p->ue_context.ue_release_timer = 0;
ue_context_p->ue_context.ue_reestablishment_timer = 0;
ue_context_p->ue_context.ul_failure_timer = 20000; // set ul_failure to 20000 for triggering rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ
rrc_eNB_free_UE(ctxt.module_id,ue_context_p);
ue_context_p->ue_context.ul_failure_timer = 0;
return (0);
}
rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP(
&ctxt,
&create_tunnel_resp,
&inde_list[0]);
ue_context_p->ue_context.setup_e_rabs=ue_context_p->ue_context.nb_of_e_rabs;
}
/* TODO parameters yet to process ... */
{
// S1AP_INITIAL_CONTEXT_SETUP_REQ(msg_p).ue_ambr;
}
rrc_eNB_process_security (
&ctxt,
ue_context_p,
&S1AP_INITIAL_CONTEXT_SETUP_REQ(msg_p).security_capabilities);
process_eNB_security_key (
&ctxt,
ue_context_p,
S1AP_INITIAL_CONTEXT_SETUP_REQ(msg_p).security_key);
{
uint8_t send_security_mode_command = TRUE;
#ifndef EXMIMO_IOT
if ((ue_context_p->ue_context.ciphering_algorithm == SecurityAlgorithmConfig__cipheringAlgorithm_eea0)
&& (ue_context_p->ue_context.integrity_algorithm == INTEGRITY_ALGORITHM_NONE)) {
send_security_mode_command = FALSE;
}
#endif
rrc_pdcp_config_security(
&ctxt,
ue_context_p,
send_security_mode_command);
if (send_security_mode_command) {
rrc_eNB_generate_SecurityModeCommand (
&ctxt,
ue_context_p);
send_security_mode_command = FALSE;
// apply ciphering after RRC security command mode
rrc_pdcp_config_security(
&ctxt,
ue_context_p,
send_security_mode_command);
} else {
rrc_eNB_generate_UECapabilityEnquiry (&ctxt, ue_context_p);
}
}
// in case, send the S1SP initial context response if it is not sent with the attach complete message
if (ue_context_p->ue_context.Status == RRC_RECONFIGURED) {
LOG_I(RRC, "Sending rrc_eNB_send_S1AP_INITIAL_CONTEXT_SETUP_RESP, cause %ld\n", ue_context_p->ue_context.reestablishment_cause);
//if(ue_context_p->ue_context.reestablishment_cause == ReestablishmentCause_spare1){}
rrc_eNB_send_S1AP_INITIAL_CONTEXT_SETUP_RESP(&ctxt,ue_context_p);
}
/*
if ((RC.rrc[ctxt.module_id]->node_type == ngran_eNB_CU) ||
(RC.rrc[ctxt.module_id]->node_type == ngran_ng_eNB_CU) ||
(RC.rrc[ctxt.module_id]->node_type == ngran_gNB_CU) ){
message_p = itti_alloc_new_message (TASK_RRC_ENB, F1AP_UE_CONTEXT_SETUP_REQ);
F1AP_UE_CONTEXT_SETUP_REQ (message_p).rrc_container = ue_p->Srb0.Tx_buffer.Payload;
F1AP_UE_CONTEXT_SETUP_REQ (message_p).rrc_container_length = ue_p->Srb0.Tx_buffer.payload_size;
F1AP_UE_CONTEXT_SETUP_REQ (message_p).gNB_CU_ue_id = 0;
F1AP_UE_CONTEXT_SETUP_REQ (message_p).gNB_DU_ue_id = 0;
F1AP_UE_CONTEXT_SETUP_REQ (message_p).old_gNB_DU_ue_id = 0xFFFFFFFF; // unknown
F1AP_UE_CONTEXT_SETUP_REQ (message_p).rnti = ue_p->rnti;
F1AP_UE_CONTEXT_SETUP_REQ (message_p).srb_id = CCCH;
F1AP_UE_CONTEXT_SETUP_REQ (message_p).execute_duplication = 1;
F1AP_UE_CONTEXT_SETUP_REQ (message_p).RAT_frequency_priority_information.en_dc = 0;
itti_send_msg_to_task (TASK_CU_F1, ctxt_pP->module_id, message_p);
LOG_D(RRC, "Send F1AP_UE_CONTEXT_SETUP_REQ with ITTI\n");
}
*/
return (0);
}
}
/*------------------------------------------------------------------------------*/
int rrc_eNB_process_S1AP_UE_CTXT_MODIFICATION_REQ(MessageDef *msg_p, const char *msg_name, instance_t instance) {
uint32_t eNB_ue_s1ap_id;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
eNB_ue_s1ap_id = S1AP_UE_CTXT_MODIFICATION_REQ (msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, UE_INITIAL_ID_INVALID, eNB_ue_s1ap_id);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to S1AP and discard it! */
MessageDef *msg_fail_p;
LOG_W(RRC, "[eNB %d] In S1AP_UE_CTXT_MODIFICATION_REQ: unknown UE from eNB_ue_s1ap_id (%d)\n", instance, eNB_ue_s1ap_id);
msg_fail_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_UE_CTXT_MODIFICATION_FAIL);
S1AP_UE_CTXT_MODIFICATION_FAIL (msg_fail_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task (TASK_S1AP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
/* TODO parameters yet to process ... */
{
if (S1AP_UE_CTXT_MODIFICATION_REQ(msg_p).present & S1AP_UE_CONTEXT_MODIFICATION_UE_AMBR) {
// S1AP_UE_CTXT_MODIFICATION_REQ(msg_p).ue_ambr;
}
}
if (S1AP_UE_CTXT_MODIFICATION_REQ(msg_p).present & S1AP_UE_CONTEXT_MODIFICATION_UE_SECU_CAP) {
if (rrc_eNB_process_security (
&ctxt,
ue_context_p,
&S1AP_UE_CTXT_MODIFICATION_REQ(msg_p).security_capabilities)) {
/* transmit the new security parameters to UE */
rrc_eNB_generate_SecurityModeCommand (
&ctxt,
ue_context_p);
}
}
if (S1AP_UE_CTXT_MODIFICATION_REQ(msg_p).present & S1AP_UE_CONTEXT_MODIFICATION_SECURITY_KEY) {
process_eNB_security_key (
&ctxt,
ue_context_p,
S1AP_UE_CTXT_MODIFICATION_REQ(msg_p).security_key);
/* TODO reconfigure lower layers... */
}
/* Send the response */
{
MessageDef *msg_resp_p;
msg_resp_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CTXT_MODIFICATION_RESP);
S1AP_UE_CTXT_MODIFICATION_RESP(msg_resp_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
itti_send_msg_to_task(TASK_S1AP, instance, msg_resp_p);
}
return (0);
}
}
/*------------------------------------------------------------------------------*/
int rrc_eNB_process_S1AP_UE_CONTEXT_RELEASE_REQ (MessageDef *msg_p, const char *msg_name, instance_t instance) {
uint32_t eNB_ue_s1ap_id;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
eNB_ue_s1ap_id = S1AP_UE_CONTEXT_RELEASE_REQ(msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, UE_INITIAL_ID_INVALID, eNB_ue_s1ap_id);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to S1AP and discard it! */
MessageDef *msg_fail_p;
LOG_W(RRC, "[eNB %d] In S1AP_UE_CONTEXT_RELEASE_REQ: unknown UE from eNB_ue_s1ap_id (%d)\n",
instance,
eNB_ue_s1ap_id);
msg_fail_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CONTEXT_RELEASE_RESP); /* TODO change message ID. */
S1AP_UE_CONTEXT_RELEASE_RESP(msg_fail_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task(TASK_S1AP, instance, msg_fail_p);
return (-1);
} else {
/* TODO release context. */
/* Send the response */
{
MessageDef *msg_resp_p;
msg_resp_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CONTEXT_RELEASE_RESP);
S1AP_UE_CONTEXT_RELEASE_RESP(msg_resp_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
itti_send_msg_to_task(TASK_S1AP, instance, msg_resp_p);
}
return (0);
}
}
//------------------------------------------------------------------------------
/*
* Send the S1 command UE_CONTEXT_RELEASE_REQUEST to the MME.
*/
void
rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ(
const module_id_t enb_mod_idP,
const rrc_eNB_ue_context_t *const ue_context_pP,
const s1ap_Cause_t causeP,
const long cause_valueP)
//------------------------------------------------------------------------------
{
if (ue_context_pP == NULL) {
LOG_E(RRC, "[eNB] In S1AP_UE_CONTEXT_RELEASE_REQ: invalid UE\n");
} else {
MSC_LOG_TX_MESSAGE(MSC_RRC_ENB,
MSC_S1AP_ENB,
NULL,
0,
"0 S1AP_UE_CONTEXT_RELEASE_REQ eNB_ue_s1ap_id 0x%06"PRIX32" ",
ue_context_pP->ue_context.eNB_ue_s1ap_id);
MessageDef *msg_context_release_req_p = NULL;
msg_context_release_req_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CONTEXT_RELEASE_REQ);
S1AP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
S1AP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).cause = causeP;
S1AP_UE_CONTEXT_RELEASE_REQ(msg_context_release_req_p).cause_value = cause_valueP;
itti_send_msg_to_task(TASK_S1AP, ENB_MODULE_ID_TO_INSTANCE(enb_mod_idP), msg_context_release_req_p);
}
}
void rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_CPLT(
module_id_t enb_mod_idP,
uint32_t eNB_ue_s1ap_id
) {
MSC_LOG_TX_MESSAGE(MSC_RRC_ENB, MSC_S1AP_ENB, NULL, 0,
"0 S1AP_UE_CONTEXT_RELEASE_COMPLETE eNB_ue_s1ap_id 0x%06"PRIX32" ",
eNB_ue_s1ap_id);
MessageDef *msg = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CONTEXT_RELEASE_COMPLETE);
S1AP_UE_CONTEXT_RELEASE_COMPLETE(msg).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
itti_send_msg_to_task(TASK_S1AP, ENB_MODULE_ID_TO_INSTANCE(enb_mod_idP), msg);
}
//-----------------------------------------------------------------------------
/*
* Process the S1 command UE_CONTEXT_RELEASE_COMMAND, sent by MME.
* The eNB should remove all e-rab, S1 context, and other context of the UE.
*/
int
rrc_eNB_process_S1AP_UE_CONTEXT_RELEASE_COMMAND(
MessageDef *msg_p,
const char *msg_name,
instance_t instance) {
//-----------------------------------------------------------------------------
uint32_t eNB_ue_s1ap_id = 0;
protocol_ctxt_t ctxt;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
struct rrc_ue_s1ap_ids_s *rrc_ue_s1ap_ids = NULL;
eNB_ue_s1ap_id = S1AP_UE_CONTEXT_RELEASE_COMMAND(msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, UE_INITIAL_ID_INVALID, eNB_ue_s1ap_id);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index */
MessageDef *msg_complete_p = NULL;
LOG_W(RRC, "[eNB %d] In S1AP_UE_CONTEXT_RELEASE_COMMAND: unknown UE from eNB_ue_s1ap_id (%d)\n",
instance,
eNB_ue_s1ap_id);
MSC_LOG_EVENT(MSC_RRC_ENB, "0 S1AP_UE_CONTEXT_RELEASE_COMPLETE eNB_ue_s1ap_id 0x%06"PRIX32" context not found",
eNB_ue_s1ap_id);
MSC_LOG_TX_MESSAGE(MSC_RRC_ENB,
MSC_S1AP_ENB,
NULL,
0,
"0 S1AP_UE_CONTEXT_RELEASE_COMPLETE eNB_ue_s1ap_id 0x%06"PRIX32" ",
eNB_ue_s1ap_id);
msg_complete_p = itti_alloc_new_message(TASK_RRC_ENB, S1AP_UE_CONTEXT_RELEASE_COMPLETE);
S1AP_UE_CONTEXT_RELEASE_COMPLETE(msg_complete_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
itti_send_msg_to_task(TASK_S1AP, instance, msg_complete_p);
rrc_ue_s1ap_ids = rrc_eNB_S1AP_get_ue_ids(RC.rrc[instance], UE_INITIAL_ID_INVALID, eNB_ue_s1ap_id);
if (rrc_ue_s1ap_ids != NULL) {
rrc_eNB_S1AP_remove_ue_ids(RC.rrc[instance], rrc_ue_s1ap_ids);
}
return -1;
} else {
ue_context_p->ue_context.ue_release_timer_s1 = 0;
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
rrc_eNB_generate_RRCConnectionRelease(&ctxt, ue_context_p);
return 0;
}
}
int rrc_eNB_process_S1AP_E_RAB_SETUP_REQ(MessageDef *msg_p, const char *msg_name, instance_t instance) {
uint16_t ue_initial_id;
uint32_t eNB_ue_s1ap_id;
gtpv1u_enb_create_tunnel_req_t create_tunnel_req;
gtpv1u_enb_create_tunnel_resp_t create_tunnel_resp;
uint8_t inde_list[NB_RB_MAX - 3]= {0};
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
uint8_t e_rab_done;
int ret = 0;
ue_initial_id = S1AP_E_RAB_SETUP_REQ (msg_p).ue_initial_id;
eNB_ue_s1ap_id = S1AP_E_RAB_SETUP_REQ (msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, ue_initial_id, eNB_ue_s1ap_id);
LOG_I(RRC, "[eNB %d] Received %s: ue_initial_id %d, eNB_ue_s1ap_id %d, nb_of_e_rabs %d\n",
instance, msg_name, ue_initial_id, eNB_ue_s1ap_id, S1AP_E_RAB_SETUP_REQ (msg_p).nb_e_rabs_tosetup);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to S1AP and discard it! */
MessageDef *msg_fail_p = NULL;
LOG_W(RRC, "[eNB %d] In S1AP_E_RAB_SETUP_REQ: unknown UE from S1AP ids (%d, %d)\n", instance, ue_initial_id, eNB_ue_s1ap_id);
msg_fail_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_SETUP_REQUEST_FAIL);
S1AP_E_RAB_SETUP_REQ (msg_fail_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
// TODO add failure cause when defined!
itti_send_msg_to_task (TASK_S1AP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
ue_context_p->ue_context.eNB_ue_s1ap_id = S1AP_E_RAB_SETUP_REQ (msg_p).eNB_ue_s1ap_id;
/* Save e RAB information for later */
{
int i;
memset(&create_tunnel_req, 0, sizeof(create_tunnel_req));
uint8_t nb_e_rabs_tosetup = S1AP_E_RAB_SETUP_REQ (msg_p).nb_e_rabs_tosetup;
e_rab_done = 0;
// keep the previous bearer
// the index for the rec
for (i = 0;
// i < nb_e_rabs_tosetup;
i < NB_RB_MAX - 3; // loop all e-rabs in e_rab[]
i++) {
//if (ue_context_p->ue_context.e_rab[i+ue_context_p->ue_context.setup_e_rabs].status == E_RAB_STATUS_DONE)
// LOG_W(RRC,"E-RAB already configured, reconfiguring\n");
// check e-rab status, if e rab status is greater than E_RAB_STATUS_DONE, don't not config this one
if(ue_context_p->ue_context.e_rab[i].status >= E_RAB_STATUS_DONE)
continue;
//ue_context_p->ue_context.e_rab[i+ue_context_p->ue_context.setup_e_rabs].status = E_RAB_STATUS_NEW;
//ue_context_p->ue_context.e_rab[i+ue_context_p->ue_context.setup_e_rabs].param = S1AP_E_RAB_SETUP_REQ (msg_p).e_rab_setup_params[i];
ue_context_p->ue_context.e_rab[i].status = E_RAB_STATUS_NEW;
ue_context_p->ue_context.e_rab[i].param = S1AP_E_RAB_SETUP_REQ (msg_p).e_rab_setup_params[e_rab_done];
create_tunnel_req.eps_bearer_id[e_rab_done] = S1AP_E_RAB_SETUP_REQ (msg_p).e_rab_setup_params[e_rab_done].e_rab_id;
create_tunnel_req.sgw_S1u_teid[e_rab_done] = S1AP_E_RAB_SETUP_REQ (msg_p).e_rab_setup_params[e_rab_done].gtp_teid;
memcpy(&create_tunnel_req.sgw_addr[e_rab_done],
& S1AP_E_RAB_SETUP_REQ (msg_p).e_rab_setup_params[e_rab_done].sgw_addr,
sizeof(transport_layer_addr_t));
LOG_I(RRC,"E_RAB setup REQ: local index %d teid %u, eps id %d \n",
i,
create_tunnel_req.sgw_S1u_teid[e_rab_done],
create_tunnel_req.eps_bearer_id[i] );
inde_list[e_rab_done] = i;
e_rab_done++;
if(e_rab_done >= nb_e_rabs_tosetup) {
break;
}
}
ue_context_p->ue_context.nb_of_e_rabs=nb_e_rabs_tosetup;
create_tunnel_req.rnti = ue_context_p->ue_context.rnti; // warning put zero above
create_tunnel_req.num_tunnels = e_rab_done;
// NN: not sure if we should create a new tunnel: need to check teid, etc.
ret = gtpv1u_create_s1u_tunnel(
instance,
&create_tunnel_req,
&create_tunnel_resp);
if ( ret != 0 ) {
LOG_E(RRC,"rrc_eNB_process_S1AP_E_RAB_SETUP_REQ : gtpv1u_create_s1u_tunnel failed,start to release UE %x\n",ue_context_p->ue_context.rnti);
ue_context_p->ue_context.ue_release_timer_s1 = 1;
ue_context_p->ue_context.ue_release_timer_thres_s1 = 100;
ue_context_p->ue_context.ue_release_timer = 0;
ue_context_p->ue_context.ue_reestablishment_timer = 0;
ue_context_p->ue_context.ul_failure_timer = 20000; // set ul_failure to 20000 for triggering rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ
rrc_eNB_free_UE(ctxt.module_id,ue_context_p);
ue_context_p->ue_context.ul_failure_timer = 0;
return (0);
}
rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP(
&ctxt,
&create_tunnel_resp,
&inde_list[0]);
ue_context_p->ue_context.setup_e_rabs+=nb_e_rabs_tosetup;
}
/* TODO parameters yet to process ... */
{
// S1AP_INITIAL_CONTEXT_SETUP_REQ(msg_p).ue_ambr;
}
rrc_eNB_generate_dedicatedRRCConnectionReconfiguration(&ctxt, ue_context_p, 0);
return (0);
}
}
/*NN: careful about the typcast of xid (long -> uint8_t*/
int rrc_eNB_send_S1AP_E_RAB_SETUP_RESP(const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
uint8_t xid ) {
MessageDef *msg_p = NULL;
int e_rab;
int e_rabs_done = 0;
int e_rabs_failed = 0;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_SETUP_RESP);
S1AP_E_RAB_SETUP_RESP (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
for (e_rab = 0; e_rab < ue_context_pP->ue_context.setup_e_rabs ; e_rab++) {
/* only respond to the corresponding transaction */
//if (((xid+1)%4) == ue_context_pP->ue_context.e_rab[e_rab].xid) {
if (xid == ue_context_pP->ue_context.e_rab[e_rab].xid) {
if (ue_context_pP->ue_context.e_rab[e_rab].status == E_RAB_STATUS_DONE) {
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].e_rab_id = ue_context_pP->ue_context.e_rab[e_rab].param.e_rab_id;
// TODO add other information from S1-U when it will be integrated
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].gtp_teid = ue_context_pP->ue_context.enb_gtp_teid[e_rab];
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].eNB_addr = ue_context_pP->ue_context.enb_gtp_addrs[e_rab];
//S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rab].eNB_addr.length += 4;
ue_context_pP->ue_context.e_rab[e_rab].status = E_RAB_STATUS_ESTABLISHED;
LOG_I (RRC,"enb_gtp_addr (msg index %d, e_rab index %d, status %d, xid %d): nb_of_e_rabs %d, e_rab_id %d, teid: %u, addr: %d.%d.%d.%d \n ",
e_rabs_done, e_rab, ue_context_pP->ue_context.e_rab[e_rab].status, xid,
ue_context_pP->ue_context.nb_of_e_rabs,
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].e_rab_id,
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].gtp_teid,
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].eNB_addr.buffer[0],
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].eNB_addr.buffer[1],
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].eNB_addr.buffer[2],
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs[e_rabs_done].eNB_addr.buffer[3]);
e_rabs_done++;
} else if ((ue_context_pP->ue_context.e_rab[e_rab].status == E_RAB_STATUS_NEW) ||
(ue_context_pP->ue_context.e_rab[e_rab].status == E_RAB_STATUS_ESTABLISHED)) {
LOG_D (RRC,"E-RAB is NEW or already ESTABLISHED\n");
} else { /* to be improved */
ue_context_pP->ue_context.e_rab[e_rab].status = E_RAB_STATUS_FAILED;
S1AP_E_RAB_SETUP_RESP (msg_p).e_rabs_failed[e_rabs_failed].e_rab_id = ue_context_pP->ue_context.e_rab[e_rab].param.e_rab_id;
e_rabs_failed++;
// TODO add cause when it will be integrated
}
S1AP_E_RAB_SETUP_RESP (msg_p).nb_of_e_rabs = e_rabs_done;
S1AP_E_RAB_SETUP_RESP (msg_p).nb_of_e_rabs_failed = e_rabs_failed;
// NN: add conditions for e_rabs_failed
} else {
/*debug info for the xid */
LOG_D(RRC,"xid does not corresponds (context e_rab index %d, status %d, xid %d/%d) \n ",
e_rab, ue_context_pP->ue_context.e_rab[e_rab].status, xid, ue_context_pP->ue_context.e_rab[e_rab].xid);
}
}
if ((e_rabs_done > 0) ) {
LOG_I(RRC,"S1AP_E_RAB_SETUP_RESP: sending the message: nb_of_erabs %d, total e_rabs %d, index %d\n",
ue_context_pP->ue_context.nb_of_e_rabs, ue_context_pP->ue_context.setup_e_rabs, e_rab);
MSC_LOG_TX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
(const char *)&S1AP_E_RAB_SETUP_RESP (msg_p),
sizeof(s1ap_e_rab_setup_resp_t),
MSC_AS_TIME_FMT" E_RAB_SETUP_RESP UE %X eNB_ue_s1ap_id %u e_rabs:%u succ %u fail",
MSC_AS_TIME_ARGS(ctxt_pP),
ue_context_pP->ue_id_rnti,
S1AP_E_RAB_SETUP_RESP (msg_p).eNB_ue_s1ap_id,
e_rabs_done, e_rabs_failed);
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
}
for(int i = 0; i < NB_RB_MAX; i++) {
ue_context_pP->ue_context.e_rab[i].xid = -1;
}
return 0;
}
int rrc_eNB_process_S1AP_E_RAB_MODIFY_REQ(MessageDef *msg_p, const char *msg_name, instance_t instance) {
int i;
uint16_t ue_initial_id;
uint32_t eNB_ue_s1ap_id;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
ue_initial_id = S1AP_E_RAB_MODIFY_REQ (msg_p).ue_initial_id;
eNB_ue_s1ap_id = S1AP_E_RAB_MODIFY_REQ (msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, ue_initial_id, eNB_ue_s1ap_id);
LOG_D(RRC, "[eNB %d] Received %s: ue_initial_id %d, eNB_ue_s1ap_id %d, nb_of_e_rabs %d\n",
instance, msg_name, ue_initial_id, eNB_ue_s1ap_id, S1AP_E_RAB_MODIFY_REQ (msg_p).nb_e_rabs_tomodify);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to S1AP and discard it! */
LOG_W(RRC, "[eNB %d] In S1AP_E_RAB_MODIFY_REQ: unknown UE from S1AP ids (%d, %d)\n", instance, ue_initial_id, eNB_ue_s1ap_id);
int nb_of_e_rabs_failed = 0;
MessageDef *msg_fail_p = NULL;
msg_fail_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_MODIFY_RESP);
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).eNB_ue_s1ap_id = S1AP_E_RAB_MODIFY_REQ (msg_p).eNB_ue_s1ap_id;
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).nb_of_e_rabs = 0;
for (nb_of_e_rabs_failed = 0; nb_of_e_rabs_failed < S1AP_E_RAB_MODIFY_REQ (msg_p).nb_e_rabs_tomodify; nb_of_e_rabs_failed++) {
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).e_rabs_failed[nb_of_e_rabs_failed].e_rab_id =
S1AP_E_RAB_MODIFY_REQ (msg_p).e_rab_modify_params[nb_of_e_rabs_failed].e_rab_id;
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).e_rabs_failed[nb_of_e_rabs_failed].cause = S1AP_CAUSE_RADIO_NETWORK;
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).e_rabs_failed[nb_of_e_rabs_failed].cause_value = 31;//S1ap_CauseRadioNetwork_multiple_E_RAB_ID_instances;
}
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).nb_of_e_rabs_failed = nb_of_e_rabs_failed;
itti_send_msg_to_task(TASK_S1AP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
ue_context_p->ue_context.eNB_ue_s1ap_id = eNB_ue_s1ap_id;
/* Save e RAB information for later */
{
int j;
boolean_t is_treated[S1AP_MAX_E_RAB] = {FALSE};
uint8_t nb_of_failed_e_rabs = 0;
// keep the previous bearer
// the index for the rec
for (i = 0; i < S1AP_E_RAB_MODIFY_REQ (msg_p).nb_e_rabs_tomodify; i++) {
if (is_treated[i] == TRUE) {
// already treated
continue;
}
for (j = i+1; j < S1AP_E_RAB_MODIFY_REQ (msg_p).nb_e_rabs_tomodify; j++) {
if (is_treated[j] == FALSE &&
S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[j].e_rab_id == S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].e_rab_id) {
// handle multiple E-RAB ID
ue_context_p->ue_context.modify_e_rab[j].status = E_RAB_STATUS_NEW;
ue_context_p->ue_context.modify_e_rab[j].param.e_rab_id = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[j].e_rab_id;
ue_context_p->ue_context.modify_e_rab[j].cause = S1AP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.modify_e_rab[j].cause_value = 31;//S1ap_CauseRadioNetwork_multiple_E_RAB_ID_instances;
nb_of_failed_e_rabs++;
is_treated[i] = TRUE;
is_treated[j] = TRUE;
}
}
if (is_treated[i] == TRUE) {
// handle multiple E-RAB ID
ue_context_p->ue_context.modify_e_rab[i].status = E_RAB_STATUS_NEW;
ue_context_p->ue_context.modify_e_rab[i].param.e_rab_id = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].e_rab_id;
ue_context_p->ue_context.modify_e_rab[i].cause = S1AP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.modify_e_rab[i].cause_value = 31;//S1ap_CauseRadioNetwork_multiple_E_RAB_ID_instances;
nb_of_failed_e_rabs++;
continue;
}
if (S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].nas_pdu.length == 0) {
// nas_pdu.length == 0
ue_context_p->ue_context.modify_e_rab[i].status = E_RAB_STATUS_NEW;
ue_context_p->ue_context.modify_e_rab[i].param.e_rab_id = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].e_rab_id;
ue_context_p->ue_context.modify_e_rab[i].cause = S1AP_CAUSE_NAS;
ue_context_p->ue_context.modify_e_rab[i].cause_value = 3;//S1ap_CauseNas_unspecified;
nb_of_failed_e_rabs++;
is_treated[i] = TRUE;
continue;
}
for (j = 0; j < NB_RB_MAX-3; j++) {
if (ue_context_p->ue_context.e_rab[j].param.e_rab_id == S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].e_rab_id) {
if(ue_context_p->ue_context.e_rab[j].status == E_RAB_STATUS_TORELEASE || ue_context_p->ue_context.e_rab[j].status == E_RAB_STATUS_DONE) {
break;
}
ue_context_p->ue_context.modify_e_rab[i].status = E_RAB_STATUS_NEW;
ue_context_p->ue_context.modify_e_rab[i].cause = S1AP_CAUSE_NOTHING;
ue_context_p->ue_context.modify_e_rab[i].param.e_rab_id = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].e_rab_id;
ue_context_p->ue_context.modify_e_rab[i].param.qos = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].qos;
ue_context_p->ue_context.modify_e_rab[i].param.nas_pdu.length = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].nas_pdu.length;
ue_context_p->ue_context.modify_e_rab[i].param.nas_pdu.buffer = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].nas_pdu.buffer;
ue_context_p->ue_context.modify_e_rab[i].param.sgw_addr = ue_context_p->ue_context.e_rab[j].param.sgw_addr;
ue_context_p->ue_context.modify_e_rab[i].param.gtp_teid = ue_context_p->ue_context.e_rab[j].param.gtp_teid;
is_treated[i] = TRUE;
break;
}
}
if (is_treated[i] == FALSE) {
// handle Unknown E-RAB ID
ue_context_p->ue_context.modify_e_rab[i].status = E_RAB_STATUS_NEW;
ue_context_p->ue_context.modify_e_rab[i].param.e_rab_id = S1AP_E_RAB_MODIFY_REQ(msg_p).e_rab_modify_params[i].e_rab_id;
ue_context_p->ue_context.modify_e_rab[i].cause = S1AP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.modify_e_rab[i].cause_value = 30;//S1ap_CauseRadioNetwork_unknown_E_RAB_ID;
nb_of_failed_e_rabs++;
is_treated[i] = TRUE;
}
}
ue_context_p->ue_context.nb_of_modify_e_rabs = S1AP_E_RAB_MODIFY_REQ (msg_p).nb_e_rabs_tomodify;
ue_context_p->ue_context.nb_of_failed_e_rabs = nb_of_failed_e_rabs;
}
/* TODO parameters yet to process ... */
{
// S1AP_INITIAL_CONTEXT_SETUP_REQ(msg_p).ue_ambr;
}
if (ue_context_p->ue_context.nb_of_failed_e_rabs < ue_context_p->ue_context.nb_of_modify_e_rabs) {
if (0 == rrc_eNB_modify_dedicatedRRCConnectionReconfiguration(&ctxt, ue_context_p, 0)) {
return (0);
}
}
{
int nb_of_e_rabs_failed = 0;
MessageDef *msg_fail_p = NULL;
msg_fail_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_MODIFY_RESP);
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).eNB_ue_s1ap_id = S1AP_E_RAB_MODIFY_REQ (msg_p).eNB_ue_s1ap_id;
// S1AP_E_RAB_MODIFY_RESP (msg_fail_p).e_rabs[S1AP_MAX_E_RAB];
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).nb_of_e_rabs = 0;
for(nb_of_e_rabs_failed = 0; nb_of_e_rabs_failed < ue_context_p->ue_context.nb_of_failed_e_rabs; nb_of_e_rabs_failed++) {
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).e_rabs_failed[nb_of_e_rabs_failed].e_rab_id =
ue_context_p->ue_context.modify_e_rab[nb_of_e_rabs_failed].param.e_rab_id;
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).e_rabs_failed[nb_of_e_rabs_failed].cause = ue_context_p->ue_context.modify_e_rab[nb_of_e_rabs_failed].cause;
}
S1AP_E_RAB_MODIFY_RESP (msg_fail_p).nb_of_e_rabs_failed = nb_of_e_rabs_failed;
itti_send_msg_to_task (TASK_S1AP, instance, msg_fail_p);
ue_context_p->ue_context.nb_of_modify_e_rabs = 0;
ue_context_p->ue_context.nb_of_failed_e_rabs = 0;
memset(ue_context_p->ue_context.modify_e_rab, 0, sizeof(ue_context_p->ue_context.modify_e_rab));
return (0);
}
} // end of ue_context_p != NULL
}
/*NN: careful about the typcast of xid (long -> uint8_t*/
int rrc_eNB_send_S1AP_E_RAB_MODIFY_RESP(const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP,
uint8_t xid ) {
MessageDef *msg_p = NULL;
int i;
int e_rab;
int e_rabs_done = 0;
int e_rabs_failed = 0;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_MODIFY_RESP);
S1AP_E_RAB_MODIFY_RESP (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
for (e_rab = 0; e_rab < ue_context_pP->ue_context.nb_of_modify_e_rabs; e_rab++) {
/* only respond to the corresponding transaction */
if (xid == ue_context_pP->ue_context.modify_e_rab[e_rab].xid) {
if (ue_context_pP->ue_context.modify_e_rab[e_rab].status == E_RAB_STATUS_DONE) {
for (i = 0; i < ue_context_pP->ue_context.setup_e_rabs; i++) {
if (ue_context_pP->ue_context.modify_e_rab[e_rab].param.e_rab_id == ue_context_pP->ue_context.e_rab[i].param.e_rab_id) {
// Update ue_context_pP->ue_context.e_rab
ue_context_pP->ue_context.e_rab[i].status = E_RAB_STATUS_ESTABLISHED;
ue_context_pP->ue_context.e_rab[i].param.qos = ue_context_pP->ue_context.modify_e_rab[e_rab].param.qos;
ue_context_pP->ue_context.e_rab[i].cause = S1AP_CAUSE_NOTHING;
break;
}
}
if (i < ue_context_pP->ue_context.setup_e_rabs) {
S1AP_E_RAB_MODIFY_RESP (msg_p).e_rabs[e_rabs_done].e_rab_id = ue_context_pP->ue_context.modify_e_rab[e_rab].param.e_rab_id;
// TODO add other information from S1-U when it will be integrated
LOG_D (RRC,"enb_gtp_addr (msg index %d, e_rab index %d, status %d, xid %d): nb_of_modify_e_rabs %d, e_rab_id %d \n ",
e_rabs_done, e_rab, ue_context_pP->ue_context.modify_e_rab[e_rab].status, xid,
ue_context_pP->ue_context.nb_of_modify_e_rabs,
S1AP_E_RAB_MODIFY_RESP (msg_p).e_rabs[e_rabs_done].e_rab_id);
e_rabs_done++;
} else {
// unexpected
S1AP_E_RAB_MODIFY_RESP (msg_p).e_rabs_failed[e_rabs_failed].e_rab_id = ue_context_pP->ue_context.modify_e_rab[e_rab].param.e_rab_id;
S1AP_E_RAB_MODIFY_RESP (msg_p).e_rabs_failed[e_rabs_failed].cause = S1AP_CAUSE_RADIO_NETWORK;
S1AP_E_RAB_MODIFY_RESP (msg_p).e_rabs_failed[e_rabs_failed].cause_value = 30;//S1ap_CauseRadioNetwork_unknown_E_RAB_ID;
e_rabs_failed++;
}
} else if ((ue_context_pP->ue_context.modify_e_rab[e_rab].status == E_RAB_STATUS_NEW) ||
(ue_context_pP->ue_context.modify_e_rab[e_rab].status == E_RAB_STATUS_ESTABLISHED)) {
LOG_D (RRC,"E-RAB is NEW or already ESTABLISHED\n");
} else { /* status == E_RAB_STATUS_FAILED; */
S1AP_E_RAB_MODIFY_RESP (msg_p).e_rabs_failed[e_rabs_failed].e_rab_id = ue_context_pP->ue_context.modify_e_rab[e_rab].param.e_rab_id;
// add failure cause when defined
S1AP_E_RAB_MODIFY_RESP (msg_p).e_rabs_failed[e_rabs_failed].cause = ue_context_pP->ue_context.modify_e_rab[e_rab].cause;
e_rabs_failed++;
}
} else {
/*debug info for the xid */
LOG_D(RRC,"xid does not corresponds (context e_rab index %d, status %d, xid %d/%d) \n ",
e_rab, ue_context_pP->ue_context.modify_e_rab[e_rab].status, xid, ue_context_pP->ue_context.modify_e_rab[e_rab].xid);
}
}
S1AP_E_RAB_MODIFY_RESP (msg_p).nb_of_e_rabs = e_rabs_done;
S1AP_E_RAB_MODIFY_RESP (msg_p).nb_of_e_rabs_failed = e_rabs_failed;
// NN: add conditions for e_rabs_failed
if (e_rabs_done > 0 || e_rabs_failed > 0) {
LOG_D(RRC,"S1AP_E_RAB_MODIFY_RESP: sending the message: nb_of_modify_e_rabs %d, total e_rabs %d, index %d\n",
ue_context_pP->ue_context.nb_of_modify_e_rabs, ue_context_pP->ue_context.setup_e_rabs, e_rab);
MSC_LOG_TX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
(const char *)&S1AP_E_RAB_SETUP_RESP (msg_p),
sizeof(s1ap_e_rab_setup_resp_t),
MSC_AS_TIME_FMT" E_RAB_MODIFY_RESP UE %X eNB_ue_s1ap_id %u e_rabs:%u succ %u fail",
MSC_AS_TIME_ARGS(ctxt_pP),
ue_context_pP->ue_id_rnti,
S1AP_E_RAB_MODIFY_RESP (msg_p).eNB_ue_s1ap_id,
e_rabs_done, e_rabs_failed);
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
} else {
itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
}
return 0;
}
int rrc_eNB_process_S1AP_E_RAB_RELEASE_COMMAND(MessageDef *msg_p, const char *msg_name, instance_t instance) {
uint32_t eNB_ue_s1ap_id;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
e_rab_release_t e_rab_release_params[S1AP_MAX_E_RAB];
uint8_t nb_e_rabs_torelease;
int erab;
int i;
uint8_t b_existed,is_existed;
uint8_t xid;
uint8_t e_rab_release_drb;
MessageDef *msg_delete_tunnels_p = NULL;
e_rab_release_drb = 0;
memcpy(&e_rab_release_params[0], &(S1AP_E_RAB_RELEASE_COMMAND (msg_p).e_rab_release_params[0]), sizeof(e_rab_release_t)*S1AP_MAX_E_RAB);
eNB_ue_s1ap_id = S1AP_E_RAB_RELEASE_COMMAND (msg_p).eNB_ue_s1ap_id;
nb_e_rabs_torelease = S1AP_E_RAB_RELEASE_COMMAND (msg_p).nb_e_rabs_torelease;
if (nb_e_rabs_torelease > S1AP_MAX_E_RAB) {
return -1;
}
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, UE_INITIAL_ID_INVALID, eNB_ue_s1ap_id);
if(ue_context_p != NULL) {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
xid = rrc_eNB_get_next_transaction_identifier(ctxt.module_id);
LOG_D(RRC,"S1AP-E-RAB Release Command: MME_UE_S1AP_ID %d ENB_UE_S1AP_ID %d release_e_rabs %d \n",
S1AP_E_RAB_RELEASE_COMMAND (msg_p).mme_ue_s1ap_id, eNB_ue_s1ap_id,nb_e_rabs_torelease);
for(erab = 0; erab < nb_e_rabs_torelease; erab++) {
b_existed = 0;
is_existed = 0;
for ( i = erab-1; i>= 0; i--) {
if (e_rab_release_params[erab].e_rab_id == e_rab_release_params[i].e_rab_id) {
is_existed = 1;
break;
}
}
if(is_existed == 1) {
//e_rab_id is existed
continue;
}
for ( i = 0; i < NB_RB_MAX; i++) {
if (e_rab_release_params[erab].e_rab_id == ue_context_p->ue_context.e_rab[i].param.e_rab_id) {
b_existed = 1;
break;
}
}
if(b_existed == 0) {
//no e_rab_id
ue_context_p->ue_context.e_rabs_release_failed[ue_context_p->ue_context.nb_release_of_e_rabs].e_rab_id = e_rab_release_params[erab].e_rab_id;
ue_context_p->ue_context.e_rabs_release_failed[ue_context_p->ue_context.nb_release_of_e_rabs].cause = S1AP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.e_rabs_release_failed[ue_context_p->ue_context.nb_release_of_e_rabs].cause_value = 30;
ue_context_p->ue_context.nb_release_of_e_rabs++;
} else {
if(ue_context_p->ue_context.e_rab[i].status == E_RAB_STATUS_FAILED) {
ue_context_p->ue_context.e_rab[i].xid = xid;
continue;
} else if(ue_context_p->ue_context.e_rab[i].status == E_RAB_STATUS_ESTABLISHED) {
ue_context_p->ue_context.e_rab[i].status = E_RAB_STATUS_TORELEASE;
ue_context_p->ue_context.e_rab[i].xid = xid;
e_rab_release_drb++;
} else {
//e_rab_id status NG
ue_context_p->ue_context.e_rabs_release_failed[ue_context_p->ue_context.nb_release_of_e_rabs].e_rab_id = e_rab_release_params[erab].e_rab_id;
ue_context_p->ue_context.e_rabs_release_failed[ue_context_p->ue_context.nb_release_of_e_rabs].cause = S1AP_CAUSE_RADIO_NETWORK;
ue_context_p->ue_context.e_rabs_release_failed[ue_context_p->ue_context.nb_release_of_e_rabs].cause_value = 0;
ue_context_p->ue_context.nb_release_of_e_rabs++;
}
}
}
if(e_rab_release_drb > 0) {
//RRCConnectionReconfiguration To UE
rrc_eNB_generate_dedicatedRRCConnectionReconfiguration_release(&ctxt, ue_context_p, xid, S1AP_E_RAB_RELEASE_COMMAND (msg_p).nas_pdu.length, S1AP_E_RAB_RELEASE_COMMAND (msg_p).nas_pdu.buffer);
} else {
//gtp tunnel delete
msg_delete_tunnels_p = itti_alloc_new_message(TASK_RRC_ENB, GTPV1U_ENB_DELETE_TUNNEL_REQ);
memset(&GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p), 0, sizeof(GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p)));
GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).rnti = ue_context_p->ue_context.rnti;
GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).from_gnb = 0;
for(i = 0; i < NB_RB_MAX; i++) {
if(xid == ue_context_p->ue_context.e_rab[i].xid) {
GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).eps_bearer_id[GTPV1U_ENB_DELETE_TUNNEL_REQ(msg_delete_tunnels_p).num_erab++] = ue_context_p->ue_context.enb_gtp_ebi[i];
ue_context_p->ue_context.enb_gtp_teid[i] = 0;
memset(&ue_context_p->ue_context.enb_gtp_addrs[i], 0, sizeof(ue_context_p->ue_context.enb_gtp_addrs[i]));
ue_context_p->ue_context.enb_gtp_ebi[i] = 0;
}
}
itti_send_msg_to_task(TASK_GTPV1_U, instance, msg_delete_tunnels_p);
//S1AP_E_RAB_RELEASE_RESPONSE
rrc_eNB_send_S1AP_E_RAB_RELEASE_RESPONSE(&ctxt, ue_context_p, xid);
}
} else {
LOG_E(RRC,"S1AP-E-RAB Release Command: MME_UE_S1AP_ID %d ENB_UE_S1AP_ID %d Error ue_context_p NULL \n",
S1AP_E_RAB_RELEASE_COMMAND (msg_p).mme_ue_s1ap_id, S1AP_E_RAB_RELEASE_COMMAND (msg_p).eNB_ue_s1ap_id);
return -1;
}
return 0;
}
int rrc_eNB_send_S1AP_E_RAB_RELEASE_RESPONSE(const protocol_ctxt_t *const ctxt_pP, rrc_eNB_ue_context_t *const ue_context_pP, uint8_t xid) {
int e_rabs_released = 0;
MessageDef *msg_p;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_RELEASE_RESPONSE);
S1AP_E_RAB_RELEASE_RESPONSE (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
for (int i = 0; i < NB_RB_MAX; i++) {
if (xid == ue_context_pP->ue_context.e_rab[i].xid) {
S1AP_E_RAB_RELEASE_RESPONSE (msg_p).e_rab_release[e_rabs_released].e_rab_id = ue_context_pP->ue_context.e_rab[i].param.e_rab_id;
e_rabs_released++;
//clear
memset(&ue_context_pP->ue_context.e_rab[i],0,sizeof(e_rab_param_t));
}
}
S1AP_E_RAB_RELEASE_RESPONSE (msg_p).nb_of_e_rabs_released = e_rabs_released;
S1AP_E_RAB_RELEASE_RESPONSE (msg_p).nb_of_e_rabs_failed = ue_context_pP->ue_context.nb_release_of_e_rabs;
memcpy(&(S1AP_E_RAB_RELEASE_RESPONSE (msg_p).e_rabs_failed[0]),&ue_context_pP->ue_context.e_rabs_release_failed[0],sizeof(e_rab_failed_t)*ue_context_pP->ue_context.nb_release_of_e_rabs);
ue_context_pP->ue_context.setup_e_rabs -= e_rabs_released;
LOG_I(RRC,"S1AP-E-RAB RELEASE RESPONSE: ENB_UE_S1AP_ID %d release_e_rabs %d setup_e_rabs %d \n",
S1AP_E_RAB_RELEASE_RESPONSE (msg_p).eNB_ue_s1ap_id,
e_rabs_released, ue_context_pP->ue_context.setup_e_rabs);
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
//clear xid
for(int i = 0; i < NB_RB_MAX; i++) {
ue_context_pP->ue_context.e_rab[i].xid = -1;
}
//clear release e_rabs
ue_context_pP->ue_context.nb_release_of_e_rabs = 0;
memset(&ue_context_pP->ue_context.e_rabs_release_failed[0],0,sizeof(e_rab_failed_t)*S1AP_MAX_E_RAB);
return 0;
}
/*------------------------------------------------------------------------------*/
int rrc_eNB_process_PAGING_IND(MessageDef *msg_p, const char *msg_name, instance_t instance) {
const unsigned int Ttab[4] = {32,64,128,256};
uint8_t Tc,Tue; /* DRX cycle of UE */
uint32_t pcch_nB; /* 4T, 2T, T, T/2, T/4, T/8, T/16, T/32 */
uint32_t N; /* N: min(T,nB). total count of PF in one DRX cycle */
uint32_t Ns = 0; /* Ns: max(1,nB/T) */
uint8_t i_s; /* i_s = floor(UE_ID/N) mod Ns */
uint32_t T; /* DRX cycle */
for (uint16_t tai_size = 0; tai_size < S1AP_PAGING_IND(msg_p).tai_size; tai_size++) {
LOG_D(RRC,"[eNB %d] In S1AP_PAGING_IND: MCC %d, MNC %d, TAC %d\n", instance, S1AP_PAGING_IND(msg_p).plmn_identity[tai_size].mcc,
S1AP_PAGING_IND(msg_p).plmn_identity[tai_size].mnc, S1AP_PAGING_IND(msg_p).tac[tai_size]);
for (uint8_t j = 0; j < RC.rrc[instance]->configuration.num_plmn; j++) {
if (RC.rrc[instance]->configuration.mcc[j] == S1AP_PAGING_IND(msg_p).plmn_identity[tai_size].mcc
&& RC.rrc[instance]->configuration.mnc[j] == S1AP_PAGING_IND(msg_p).plmn_identity[tai_size].mnc
&& RC.rrc[instance]->configuration.tac == S1AP_PAGING_IND(msg_p).tac[tai_size]) {
for (uint8_t CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
lte_frame_type_t frame_type = RC.eNB[instance][CC_id]->frame_parms.frame_type;
/* get nB from configuration */
/* get default DRX cycle from configuration */
Tc = (uint8_t)RC.rrc[instance]->configuration.radioresourceconfig[CC_id].pcch_defaultPagingCycle;
if (Tc < LTE_PCCH_Config__defaultPagingCycle_rf32 || Tc > LTE_PCCH_Config__defaultPagingCycle_rf256) {
continue;
}
Tue = (uint8_t)S1AP_PAGING_IND(msg_p).paging_drx;
/* set T = min(Tc,Tue) */
T = Tc < Tue ? Ttab[Tc] : Ttab[Tue];
/* set pcch_nB = PCCH-Config->nB */
pcch_nB = (uint32_t)RC.rrc[instance]->configuration.radioresourceconfig[CC_id].pcch_nB;
switch (pcch_nB) {
case LTE_PCCH_Config__nB_fourT:
Ns = 4;
break;
case LTE_PCCH_Config__nB_twoT:
Ns = 2;
break;
default:
Ns = 1;
break;
}
/* set N = min(T,nB) */
if (pcch_nB > LTE_PCCH_Config__nB_oneT) {
switch (pcch_nB) {
case LTE_PCCH_Config__nB_halfT:
N = T/2;
break;
case LTE_PCCH_Config__nB_quarterT:
N = T/4;
break;
case LTE_PCCH_Config__nB_oneEighthT:
N = T/8;
break;
case LTE_PCCH_Config__nB_oneSixteenthT:
N = T/16;
break;
case LTE_PCCH_Config__nB_oneThirtySecondT:
N = T/32;
break;
default:
/* pcch_nB error */
LOG_E(RRC, "[eNB %d] In S1AP_PAGING_IND: pcch_nB error (pcch_nB %d) \n",
instance, pcch_nB);
return (-1);
}
} else {
N = T;
}
/* insert data to UE_PF_PO or update data in UE_PF_PO */
pthread_mutex_lock(&ue_pf_po_mutex);
uint8_t i = 0;
for (i = 0; i < MAX_MOBILES_PER_ENB; i++) {
if ((UE_PF_PO[CC_id][i].enable_flag == TRUE && UE_PF_PO[CC_id][i].ue_index_value == (uint16_t)(S1AP_PAGING_IND(msg_p).ue_index_value))
|| (UE_PF_PO[CC_id][i].enable_flag != TRUE)) {
/* set T = min(Tc,Tue) */
UE_PF_PO[CC_id][i].T = T;
/* set UE_ID */
UE_PF_PO[CC_id][i].ue_index_value = (uint16_t)S1AP_PAGING_IND(msg_p).ue_index_value;
/* calculate PF and PO */
/* set PF_min : SFN mod T = (T div N)*(UE_ID mod N) */
UE_PF_PO[CC_id][i].PF_min = (T / N) * (UE_PF_PO[CC_id][i].ue_index_value % N);
/* set PO */
/* i_s = floor(UE_ID/N) mod Ns */
i_s = (uint8_t)((UE_PF_PO[CC_id][i].ue_index_value / N) % Ns);
if (Ns == 1) {
UE_PF_PO[CC_id][i].PO = (frame_type==FDD) ? 9 : 0;
} else if (Ns==2) {
UE_PF_PO[CC_id][i].PO = (frame_type==FDD) ? (4+(5*i_s)) : (5*i_s);
} else if (Ns==4) {
UE_PF_PO[CC_id][i].PO = (frame_type==FDD) ? (4*(i_s&1)+(5*(i_s>>1))) : ((i_s&1)+(5*(i_s>>1)));
}
if (UE_PF_PO[CC_id][i].enable_flag == TRUE) {
//paging exist UE log
LOG_D(RRC,"[eNB %d] CC_id %d In S1AP_PAGING_IND: Update exist UE %d, T %d, PF %d, PO %d\n", instance, CC_id, UE_PF_PO[CC_id][i].ue_index_value, T, UE_PF_PO[CC_id][i].PF_min, UE_PF_PO[CC_id][i].PO);
} else {
/* set enable_flag */
UE_PF_PO[CC_id][i].enable_flag = TRUE;
//paging new UE log
LOG_D(RRC,"[eNB %d] CC_id %d In S1AP_PAGING_IND: Insert a new UE %d, T %d, PF %d, PO %d\n", instance, CC_id, UE_PF_PO[CC_id][i].ue_index_value, T, UE_PF_PO[CC_id][i].PF_min, UE_PF_PO[CC_id][i].PO);
}
break;
}
}
pthread_mutex_unlock(&ue_pf_po_mutex);
uint32_t length;
uint8_t buffer[RRC_BUF_SIZE];
uint8_t *message_buffer;
/* Transfer data to PDCP */
MessageDef *message_p;
message_p = itti_alloc_new_message (TASK_RRC_ENB, RRC_PCCH_DATA_REQ);
/* Create message for PDCP (DLInformationTransfer_t) */
length = do_Paging (instance,
buffer,
S1AP_PAGING_IND(msg_p).ue_paging_identity,
S1AP_PAGING_IND(msg_p).cn_domain);
if(length == -1) {
LOG_I(RRC, "do_Paging error");
return -1;
}
message_buffer = itti_malloc (TASK_RRC_ENB, TASK_PDCP_ENB, length);
/* Uses a new buffer to avoid issue with PDCP buffer content that could be changed by PDCP (asynchronous message handling). */
memcpy (message_buffer, buffer, length);
RRC_PCCH_DATA_REQ (message_p).sdu_size = length;
RRC_PCCH_DATA_REQ (message_p).sdu_p = message_buffer;
RRC_PCCH_DATA_REQ (message_p).mode = PDCP_TRANSMISSION_MODE_TRANSPARENT; /* not used */
RRC_PCCH_DATA_REQ (message_p).rnti = P_RNTI;
RRC_PCCH_DATA_REQ (message_p).ue_index = i;
RRC_PCCH_DATA_REQ (message_p).CC_id = CC_id;
LOG_D(RRC, "[eNB %d] CC_id %d In S1AP_PAGING_IND: send encdoed buffer to PDCP buffer_size %d\n", instance, CC_id, length);
itti_send_msg_to_task (TASK_PDCP_ENB, instance, message_p);
}
}
}
}
return (0);
}
/*NN: careful about the typcast of xid (long -> uint8_t*/
int rrc_eNB_send_PATH_SWITCH_REQ(const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP) {
MessageDef *msg_p = NULL;
int e_rab = 0;
int e_rabs_done = 0;
rrc_ue_s1ap_ids_t *rrc_ue_s1ap_ids_p = NULL;
hashtable_rc_t h_rc;
gtpv1u_enb_create_tunnel_req_t create_tunnel_req;
gtpv1u_enb_create_tunnel_resp_t create_tunnel_resp;
uint8_t inde_list[ue_context_pP->ue_context.nb_of_e_rabs];
memset(inde_list, 0, ue_context_pP->ue_context.nb_of_e_rabs*sizeof(uint8_t));
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_PATH_SWITCH_REQ);
ue_context_pP->ue_context.ue_initial_id = get_next_ue_initial_id (ctxt_pP->module_id);
S1AP_PATH_SWITCH_REQ (msg_p).ue_initial_id = ue_context_pP->ue_context.ue_initial_id;
rrc_ue_s1ap_ids_p = malloc(sizeof(*rrc_ue_s1ap_ids_p));
rrc_ue_s1ap_ids_p->ue_initial_id = ue_context_pP->ue_context.ue_initial_id;
rrc_ue_s1ap_ids_p->eNB_ue_s1ap_id = UE_INITIAL_ID_INVALID;
rrc_ue_s1ap_ids_p->ue_rnti = ctxt_pP->rnti;
h_rc = hashtable_insert(RC.rrc[ctxt_pP->module_id]->initial_id2_s1ap_ids,
(hash_key_t)ue_context_pP->ue_context.ue_initial_id,
rrc_ue_s1ap_ids_p);
if (h_rc != HASH_TABLE_OK) {
LOG_E(S1AP, "[eNB %d] Error while hashtable_insert in initial_id2_s1ap_ids ue_initial_id %u\n",
ctxt_pP->module_id, ue_context_pP->ue_context.ue_initial_id);
}
S1AP_PATH_SWITCH_REQ (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
S1AP_PATH_SWITCH_REQ (msg_p).mme_ue_s1ap_id = ue_context_pP->ue_context.mme_ue_s1ap_id;
S1AP_PATH_SWITCH_REQ (msg_p).ue_gummei.mcc = ue_context_pP->ue_context.ue_gummei.mcc;
S1AP_PATH_SWITCH_REQ (msg_p).ue_gummei.mnc = ue_context_pP->ue_context.ue_gummei.mnc;
S1AP_PATH_SWITCH_REQ (msg_p).ue_gummei.mnc_len = ue_context_pP->ue_context.ue_gummei.mnc_len;
S1AP_PATH_SWITCH_REQ (msg_p).ue_gummei.mme_code = ue_context_pP->ue_context.ue_gummei.mme_code;
S1AP_PATH_SWITCH_REQ (msg_p).ue_gummei.mme_group_id = ue_context_pP->ue_context.ue_gummei.mme_group_id;
S1AP_PATH_SWITCH_REQ (msg_p).security_capabilities.encryption_algorithms=ue_context_pP->ue_context.security_capabilities.encryption_algorithms;
S1AP_PATH_SWITCH_REQ (msg_p).security_capabilities.integrity_algorithms=ue_context_pP->ue_context.security_capabilities.integrity_algorithms;
LOG_I (RRC,"Path switch request: nb nb_of_e_rabs %u status %u\n",
ue_context_pP->ue_context.nb_of_e_rabs,
ue_context_pP->ue_context.e_rab[e_rab].status);
memset(&create_tunnel_req, 0, sizeof(create_tunnel_req));
// the context for UE to be handovered is obtained through ho_req message
for (e_rab = 0; e_rab < ue_context_pP->ue_context.nb_of_e_rabs ; e_rab++) {
if (ue_context_pP->ue_context.e_rab[e_rab].status == E_RAB_STATUS_ESTABLISHED) {
create_tunnel_req.eps_bearer_id[e_rabs_done] = ue_context_pP->ue_context.e_rab[e_rab].param.e_rab_id;
create_tunnel_req.sgw_S1u_teid[e_rabs_done] = ue_context_pP->ue_context.e_rab[e_rab].param.gtp_teid;
memcpy(&create_tunnel_req.sgw_addr[e_rabs_done],
&ue_context_pP->ue_context.e_rab[e_rab].param.sgw_addr,
sizeof(transport_layer_addr_t));
inde_list[e_rabs_done] = e_rab;
e_rabs_done++;
}
}
S1AP_PATH_SWITCH_REQ (msg_p).nb_of_e_rabs = e_rabs_done;
create_tunnel_req.rnti = ue_context_pP->ue_context.rnti;
create_tunnel_req.num_tunnels = e_rabs_done;
gtpv1u_create_s1u_tunnel(
ctxt_pP->instance,
&create_tunnel_req,
&create_tunnel_resp);
rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP(
ctxt_pP,
&create_tunnel_resp,
&inde_list[0]);
for (e_rab = 0; e_rab < e_rabs_done; e_rab++) {
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].e_rab_id = create_tunnel_resp.eps_bearer_id[e_rab];
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].gtp_teid = create_tunnel_resp.enb_S1u_teid[e_rab];
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].eNB_addr = create_tunnel_resp.enb_addr;
LOG_I (RRC,"enb_gtp_addr (msg index %d, e_rab index %d, status %d): nb_of_e_rabs %d, e_rab_id %d, teid: %u, addr: %d.%d.%d.%d \n ",
e_rabs_done, e_rab, ue_context_pP->ue_context.e_rab[inde_list[e_rab]].status,
S1AP_PATH_SWITCH_REQ (msg_p).nb_of_e_rabs,
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].e_rab_id,
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].gtp_teid,
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].eNB_addr.buffer[0],
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].eNB_addr.buffer[1],
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].eNB_addr.buffer[2],
S1AP_PATH_SWITCH_REQ (msg_p).e_rabs_tobeswitched[e_rab].eNB_addr.buffer[3]);
}
// NN: add conditions for e_rabs_failed
if (e_rabs_done > 0) {
LOG_I(RRC,"S1AP_PATH_SWITCH_REQ: sending the message: nb_of_erabstobeswitched %d, total e_rabs %d, index %d\n",
S1AP_PATH_SWITCH_REQ (msg_p).nb_of_e_rabs, ue_context_pP->ue_context.setup_e_rabs, e_rab);
MSC_LOG_TX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
(const char *)&S1AP_PATH_SWITCH_REQ (msg_p),
sizeof(s1ap_path_switch_req_t),
MSC_AS_TIME_FMT" PATH_SWITCH_REQ UE %X eNB_ue_s1ap_id %u e_rabs:%u succ",
MSC_AS_TIME_ARGS(ctxt_pP),
ue_context_pP->ue_id_rnti,
S1AP_PATH_SWITCH_REQ (msg_p).eNB_ue_s1ap_id,
e_rabs_done);
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
} else {
itti_free(ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
}
return 0;
}
int rrc_eNB_process_X2AP_TUNNEL_SETUP_REQ(instance_t instance, rrc_eNB_ue_context_t *const ue_context_target_p) {
gtpv1u_enb_create_x2u_tunnel_req_t create_tunnel_req;
gtpv1u_enb_create_x2u_tunnel_resp_t create_tunnel_resp;
uint8_t e_rab_done;
uint8_t inde_list[NB_RB_MAX - 3]= {0};
if (ue_context_target_p == NULL) {
return (-1);
} else {
/* Save e RAB information for later */
{
LOG_I(RRC, "[eNB %d] rrc_eNB_process_X2AP_TUNNEL_SETUP_REQ: rnti %u nb_of_e_rabs %d\n",
instance, ue_context_target_p->ue_context.rnti, ue_context_target_p->ue_context.nb_of_e_rabs);
int i;
memset(&create_tunnel_req, 0, sizeof(create_tunnel_req));
uint8_t nb_e_rabs_tosetup = ue_context_target_p->ue_context.nb_of_e_rabs;
e_rab_done = 0;
for (i = 0; i < nb_e_rabs_tosetup; i++) {
if(ue_context_target_p->ue_context.e_rab[i].status >= E_RAB_STATUS_DONE)
continue;
create_tunnel_req.eps_bearer_id[e_rab_done] = ue_context_target_p->ue_context.e_rab[i].param.e_rab_id;
LOG_I(RRC,"x2 tunnel setup: local index %d UE id %x, eps id %d \n",
i,
ue_context_target_p->ue_context.rnti,
create_tunnel_req.eps_bearer_id[i] );
inde_list[i] = e_rab_done;
e_rab_done++;
}
create_tunnel_req.rnti = ue_context_target_p->ue_context.rnti; // warning put zero above
create_tunnel_req.num_tunnels = e_rab_done;
// NN: not sure if we should create a new tunnel: need to check teid, etc.
gtpv1u_create_x2u_tunnel(
instance,
&create_tunnel_req,
&create_tunnel_resp);
ue_context_target_p->ue_context.nb_x2u_e_rabs = create_tunnel_resp.num_tunnels;
for (i = 0; i < create_tunnel_resp.num_tunnels; i++) {
ue_context_target_p->ue_context.enb_gtp_x2u_teid[inde_list[i]] = create_tunnel_resp.enb_X2u_teid[i];
ue_context_target_p->ue_context.enb_gtp_x2u_addrs[inde_list[i]] = create_tunnel_resp.enb_addr;
ue_context_target_p->ue_context.enb_gtp_x2u_ebi[inde_list[i]] = create_tunnel_resp.eps_bearer_id[i];
LOG_I(RRC, "rrc_eNB_process_X2AP_TUNNEL_SETUP_REQ tunnel (%u, %u) bearer UE context index %u, msg index %u, eps bearer id %u, gtp addr len %d \n",
create_tunnel_resp.enb_X2u_teid[i],
ue_context_target_p->ue_context.enb_gtp_x2u_teid[inde_list[i]],
inde_list[i],
i,
create_tunnel_resp.eps_bearer_id[i],
create_tunnel_resp.enb_addr.length);
}
}
return (0);
}
}
int rrc_eNB_process_S1AP_PATH_SWITCH_REQ_ACK (MessageDef *msg_p,
const char *msg_name,
instance_t instance) {
uint16_t ue_initial_id;
uint32_t eNB_ue_s1ap_id;
//gtpv1u_enb_create_tunnel_req_t create_tunnel_req;
//gtpv1u_enb_create_tunnel_resp_t create_tunnel_resp;
gtpv1u_enb_delete_tunnel_req_t delete_tunnel_req;
struct rrc_eNB_ue_context_s *ue_context_p = NULL;
protocol_ctxt_t ctxt;
int i;
ue_initial_id = S1AP_PATH_SWITCH_REQ_ACK (msg_p).ue_initial_id;
eNB_ue_s1ap_id = S1AP_PATH_SWITCH_REQ_ACK (msg_p).eNB_ue_s1ap_id;
ue_context_p = rrc_eNB_get_ue_context_from_s1ap_ids(instance, ue_initial_id, eNB_ue_s1ap_id);
LOG_I(RRC, "[eNB %d] Received %s: ue_initial_id %d, eNB_ue_s1ap_id %d, nb_of_e_rabs %d\n",
instance, msg_name, ue_initial_id, eNB_ue_s1ap_id, S1AP_E_RAB_SETUP_REQ (msg_p).nb_e_rabs_tosetup);
if (ue_context_p == NULL) {
/* Can not associate this message to an UE index, send a failure to S1AP and discard it! */
//MessageDef *msg_fail_p = NULL;
LOG_W(RRC, "[eNB %d] In S1AP_PATH_SWITCH_REQ_ACK: unknown UE from S1AP ids (%d, %d)\n", instance, ue_initial_id, eNB_ue_s1ap_id);
//msg_fail_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_PATH_SWITCH_REQ_ACK_FAIL);
//S1AP_PATH_SWITCH_REQ_ACK (msg_fail_p).eNB_ue_s1ap_id = eNB_ue_s1ap_id;
// TODO add failure cause when defined!
//itti_send_msg_to_task (TASK_S1AP, instance, msg_fail_p);
return (-1);
} else {
PROTOCOL_CTXT_SET_BY_INSTANCE(&ctxt, instance, ENB_FLAG_YES, ue_context_p->ue_context.rnti, 0, 0);
ue_context_p->ue_context.eNB_ue_s1ap_id = S1AP_PATH_SWITCH_REQ_ACK (msg_p).eNB_ue_s1ap_id;
ue_context_p->ue_context.mme_ue_s1ap_id = S1AP_PATH_SWITCH_REQ_ACK (msg_p).mme_ue_s1ap_id;
/* Save e RAB information for later */
{
ue_context_p->ue_context.nb_release_of_e_rabs = S1AP_PATH_SWITCH_REQ_ACK (msg_p).nb_e_rabs_tobereleased;
for (i = 0;
i < ue_context_p->ue_context.setup_e_rabs; // go over total number of e_rabs received through x2_ho_req msg
i++) {
// assume that we are releasing all the DRBs
ue_context_p->ue_context.e_rab[i].status = E_RAB_STATUS_REESTABLISHED;
if (ue_context_p->ue_context.nb_release_of_e_rabs==0) {
LOG_I(RRC,"Bearer re-established with ID: %d\n", ue_context_p->ue_context.e_rab[i].param.e_rab_id);
}
}
//memset(&create_tunnel_req, 0 , sizeof(create_tunnel_req));
uint8_t nb_e_rabs_tobeswitched = S1AP_PATH_SWITCH_REQ_ACK (msg_p).nb_e_rabs_tobeswitched;
// keep the previous bearer
// the index for the rec
if (nb_e_rabs_tobeswitched>0) {
int e_rab_switch_index=0;
for (i = 0;
i < ue_context_p->ue_context.setup_e_rabs; // go over total number of e_rabs received through x2_ho_req msg
i++) {
/* Harmonize with enb_gtp_teid, enb_gtp_addrs, and enb_gtp_rbi vars in the top level structure */
if (ue_context_p->ue_context.e_rab[i].param.e_rab_id == S1AP_PATH_SWITCH_REQ_ACK (msg_p).e_rabs_tobeswitched[e_rab_switch_index].e_rab_id) {
ue_context_p->ue_context.e_rab[i].param.e_rab_id = S1AP_PATH_SWITCH_REQ_ACK (msg_p).e_rabs_tobeswitched[e_rab_switch_index].e_rab_id;
ue_context_p->ue_context.e_rab[i].param.sgw_addr= S1AP_PATH_SWITCH_REQ_ACK (msg_p).e_rabs_tobeswitched[e_rab_switch_index].sgw_addr;
ue_context_p->ue_context.e_rab[i].param.gtp_teid = S1AP_PATH_SWITCH_REQ_ACK (msg_p).e_rabs_tobeswitched[e_rab_switch_index].gtp_teid;
e_rab_switch_index++;
}
}
}
}
ue_context_p->ue_context.ue_ambr=S1AP_PATH_SWITCH_REQ_ACK (msg_p).ue_ambr;
ue_context_p->ue_context.setup_e_rabs = ue_context_p->ue_context.setup_e_rabs - ue_context_p->ue_context.nb_release_of_e_rabs;
ue_context_p->ue_context.nb_of_e_rabs = ue_context_p->ue_context.nb_of_e_rabs - ue_context_p->ue_context.nb_release_of_e_rabs;
memset(&delete_tunnel_req, 0, sizeof(delete_tunnel_req));
if (ue_context_p->ue_context.nb_release_of_e_rabs>0) {
int e_rab_release_index=0;
for (i = 0;
i < ue_context_p->ue_context.setup_e_rabs;
i++) {
if (ue_context_p->ue_context.e_rab[i].param.e_rab_id == S1AP_PATH_SWITCH_REQ_ACK (msg_p).e_rabs_tobereleased[e_rab_release_index].e_rab_id) {
LOG_I(RRC,"Bearer released with ID: %d\n", ue_context_p->ue_context.e_rab[i].param.e_rab_id);
ue_context_p->ue_context.e_rab[i].status = E_RAB_STATUS_TORELEASE;
ue_context_p->ue_context.e_rabs_tobereleased[e_rab_release_index]=S1AP_PATH_SWITCH_REQ_ACK (msg_p).e_rabs_tobereleased[e_rab_release_index].e_rab_id;
delete_tunnel_req.eps_bearer_id[e_rab_release_index] = S1AP_PATH_SWITCH_REQ_ACK (msg_p).e_rabs_tobereleased[e_rab_release_index].e_rab_id;
e_rab_release_index++;
} else {
LOG_I(RRC,"Bearer re-established with ID: %d\n", ue_context_p->ue_context.e_rab[i].param.e_rab_id);
}
}
}
if (ue_context_p->ue_context.nb_release_of_e_rabs>0) {
delete_tunnel_req.rnti= ue_context_p->ue_context.rnti;
delete_tunnel_req.num_erab= ue_context_p->ue_context.nb_release_of_e_rabs;
/* this could also be done through ITTI message */
gtpv1u_delete_s1u_tunnel(instance,
&delete_tunnel_req);
/* TBD: release the DRB not admitted */
//rrc_eNB_generate_dedicatedRRCConnectionReconfiguration(&ctxt, ue_context_p, 0);
}
/* Security key */
ue_context_p->ue_context.next_hop_chain_count=S1AP_PATH_SWITCH_REQ_ACK (msg_p).next_hop_chain_count;
memcpy ( ue_context_p->ue_context.next_security_key,
S1AP_PATH_SWITCH_REQ_ACK (msg_p).next_security_key,
SECURITY_KEY_LENGTH);
rrc_eNB_send_X2AP_UE_CONTEXT_RELEASE(&ctxt, ue_context_p);
return (0);
}
}
int rrc_eNB_send_X2AP_UE_CONTEXT_RELEASE(const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP) {
MessageDef *msg_p = NULL;
msg_p = itti_alloc_new_message (TASK_RRC_ENB, X2AP_UE_CONTEXT_RELEASE);
X2AP_UE_CONTEXT_RELEASE (msg_p).rnti = ue_context_pP->ue_context.rnti;
X2AP_UE_CONTEXT_RELEASE (msg_p).source_assoc_id = ue_context_pP->ue_context.handover_info->assoc_id;
itti_send_msg_to_task (TASK_X2AP, ctxt_pP->instance, msg_p);
return (0);
}
int s1ap_ue_context_release(instance_t instance, const uint32_t eNB_ue_s1ap_id) {
s1ap_eNB_instance_t *s1ap_eNB_instance_p = NULL;
struct s1ap_eNB_ue_context_s *ue_context_p = NULL;
s1ap_eNB_instance_p = s1ap_eNB_get_instance(instance);
DevAssert(s1ap_eNB_instance_p != NULL);
if ((ue_context_p = s1ap_eNB_get_ue_context(s1ap_eNB_instance_p,
eNB_ue_s1ap_id)) == NULL) {
/* The context for this eNB ue s1ap id doesn't exist in the map of eNB UEs */
LOG_W(RRC,"Failed to find ue context associated with eNB ue s1ap id: %u\n",
eNB_ue_s1ap_id);
return -1;
}
// release UE context
struct s1ap_eNB_ue_context_s *ue_context2_p = NULL;
if ((ue_context2_p = RB_REMOVE(s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head, ue_context_p))
!= NULL) {
LOG_W(RRC,"Removed UE context eNB_ue_s1ap_id %u\n",
ue_context2_p->eNB_ue_s1ap_id);
s1ap_eNB_free_ue_context(ue_context2_p);
} else {
LOG_W(RRC,"Removing UE context eNB_ue_s1ap_id %u: did not find context\n",
ue_context_p->eNB_ue_s1ap_id);
}
/*RB_FOREACH(ue_context_p, s1ap_ue_map, &s1ap_eNB_instance_p->s1ap_ue_head) {
S1AP_WARN("in s1ap_ue_map: UE context eNB_ue_s1ap_id %u mme_ue_s1ap_id %u state %u\n",
ue_context_p->eNB_ue_s1ap_id, ue_context_p->mme_ue_s1ap_id,
ue_context_p->ue_state);
}*/
return 0;
}
int rrc_eNB_send_E_RAB_Modification_Indication(const protocol_ctxt_t *const ctxt_pP,
rrc_eNB_ue_context_t *const ue_context_pP) {
MessageDef *msg_p = NULL;
int e_rab = 0;
int e_rab_modify_index = 0;
int e_rab_notmodify_index = 0;
uint8_t inde_list[ue_context_pP->ue_context.nb_of_e_rabs];
memset(inde_list, 0, ue_context_pP->ue_context.nb_of_e_rabs*sizeof(uint8_t));
msg_p = itti_alloc_new_message (TASK_RRC_ENB, S1AP_E_RAB_MODIFICATION_IND);
S1AP_E_RAB_MODIFICATION_IND (msg_p).eNB_ue_s1ap_id = ue_context_pP->ue_context.eNB_ue_s1ap_id;
S1AP_E_RAB_MODIFICATION_IND (msg_p).mme_ue_s1ap_id = ue_context_pP->ue_context.mme_ue_s1ap_id;
LOG_I (RRC,"E-RAB modification indication: nb nb_of_e_rabs %u status %u\n",
ue_context_pP->ue_context.nb_of_e_rabs,
ue_context_pP->ue_context.e_rab[e_rab].status);
if (ue_context_pP->ue_context.nb_of_modify_endc_e_rabs > 0){
S1AP_E_RAB_MODIFICATION_IND (msg_p).nb_of_e_rabs_tobemodified = ue_context_pP->ue_context.nb_of_modify_endc_e_rabs;
for (e_rab = 0; e_rab < ue_context_pP->ue_context.setup_e_rabs ; e_rab++) {
//Add E-RAB in the list of E-RABs to be modified
if (ue_context_pP->ue_context.e_rab[e_rab].status == E_RAB_STATUS_TOMODIFY) {
S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_tobemodified[e_rab_modify_index].e_rab_id = ue_context_pP->ue_context.e_rab[e_rab].param.e_rab_id;
memcpy(S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_tobemodified[e_rab_modify_index].eNB_addr.buffer,
ue_context_pP->ue_context.gnb_gtp_endc_addrs[e_rab].buffer,
ue_context_pP->ue_context.gnb_gtp_endc_addrs[e_rab].length);
S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_tobemodified[e_rab_modify_index].eNB_addr.length = ue_context_pP->ue_context.gnb_gtp_endc_addrs[e_rab].length;
S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_tobemodified[e_rab_modify_index].gtp_teid = ue_context_pP->ue_context.gnb_gtp_endc_teid[e_rab];
e_rab_modify_index++;
}
//Add E-RAB in the list of E-RABs NOT to be modified
else{
S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_nottobemodified[e_rab_notmodify_index].e_rab_id = ue_context_pP->ue_context.e_rab[e_rab].param.e_rab_id;
memcpy(S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_nottobemodified[e_rab_notmodify_index].eNB_addr.buffer,
ue_context_pP->ue_context.gnb_gtp_endc_addrs[e_rab].buffer,
ue_context_pP->ue_context.gnb_gtp_endc_addrs[e_rab].length);
S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_nottobemodified[e_rab_notmodify_index].eNB_addr.length = ue_context_pP->ue_context.gnb_gtp_endc_addrs[e_rab].length;
S1AP_E_RAB_MODIFICATION_IND (msg_p).e_rabs_nottobemodified[e_rab_notmodify_index].gtp_teid = ue_context_pP->ue_context.gnb_gtp_endc_teid[e_rab];
e_rab_notmodify_index++;
}
}
S1AP_E_RAB_MODIFICATION_IND (msg_p).nb_of_e_rabs_nottobemodified = e_rab_notmodify_index;
}
if (e_rab_modify_index > 0) {
LOG_I(RRC,"S1AP_E_RAB_MODIFICATION_IND: sending the message: nb_of_erabstobemodified %d, total e_rabs %d, index %d\n",
S1AP_E_RAB_MODIFICATION_IND (msg_p).nb_of_e_rabs_tobemodified, ue_context_pP->ue_context.setup_e_rabs, e_rab);
MSC_LOG_TX_MESSAGE(
MSC_RRC_ENB,
MSC_S1AP_ENB,
(const char *)&S1AP_E_RAB_MODIFICATION_IND (msg_p),
sizeof(s1ap_e_rab_modification_ind_t),
MSC_AS_TIME_FMT" E RAB MODIFICATION IND UE %X eNB_ue_s1ap_id %u e_rabs:%u succ",
MSC_AS_TIME_ARGS(ctxt_pP),
ue_context_pP->ue_id_rnti,
S1AP_E_RAB_MODIFICATION_IND (msg_p).eNB_ue_s1ap_id,
e_rab_modify_index);
itti_send_msg_to_task (TASK_S1AP, ctxt_pP->instance, msg_p);
} else {
itti_free(ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
}
return 0;
}
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