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openairinterface5g/openair3/NAS/COMMON/ESM/MSG/PduSessionEstablishmentAccept.c
T
Angelo Athanassopoulos 07abf4329d PSEA - IEI DNN - This is the last IEI in the message. 
Before this commit each time the message was captured, it entered the
default switch statement, which is meant to show that  we received an
uknown IEI.

Now after the DNN IEI, we set offset=msg_length, to exit the
switch.
2022-10-28 13:54:13 +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
*/
#include "PduSessionEstablishmentAccept.h"
#include "common/utils/LOG/log.h"
#include "nr_nas_msg_sim.h"
#include "openair2/RRC/NAS/nas_config.h"
#include "openair2/SDAP/nr_sdap/nr_sdap.h"
extern char *baseNetAddress;
void capture_pdu_session_establishment_accept_msg(uint8_t *buffer, uint32_t msg_length)
{
uint8_t offset = 0;
security_protected_nas_5gs_msg_t sec_nas_hdr;
security_protected_plain_nas_5gs_msg_t sec_nas_msg;
pdu_session_establishment_accept_msg_t psea_msg;
sec_nas_hdr.epd = *(buffer + (offset++));
sec_nas_hdr.sht = *(buffer + (offset++));
sec_nas_hdr.mac = htonl(*(uint32_t *)(buffer + offset));
offset+=sizeof(sec_nas_hdr.mac);
sec_nas_hdr.sqn = *(buffer + (offset++));
sec_nas_msg.epd = *(buffer + (offset++));
sec_nas_msg.sht = *(buffer + (offset++));
sec_nas_msg.msg_type = *(buffer + (offset++));
sec_nas_msg.payload_type = *(buffer + (offset++));
sec_nas_msg.payload_len = htons(*(uint16_t *)(buffer + offset));
offset+=sizeof(sec_nas_msg.payload_len);
/* Mandatory Presence IEs */
psea_msg.epd = *(buffer + (offset++));
psea_msg.pdu_id = *(buffer + (offset++));
psea_msg.pti = *(buffer + (offset++));
psea_msg.msg_type = *(buffer + (offset++));
psea_msg.pdu_type = *(buffer + offset) & 0x0f;
psea_msg.ssc_mode = (*(buffer + (offset++)) & 0xf0) >> 4;
psea_msg.qos_rules.length = htons(*(uint16_t *)(buffer + offset));
offset+=sizeof(psea_msg.qos_rules.length);
/* Supports the capture of only one QoS Rule, it should be changed for multiple QoS Rules */
qos_rule_t qos_rule;
qos_rule.id = *(buffer + (offset++));
qos_rule.length = htons(*(uint16_t *)(buffer + offset));
offset+=sizeof(qos_rule.length);
qos_rule.oc = (*(buffer + offset) & 0xE0) >> 5;
qos_rule.dqr = (*(buffer + offset) & 0x10) >> 4;
qos_rule.nb_pf = *(buffer + (offset++)) & 0x0F;
if(qos_rule.nb_pf) {
packet_filter_t pf;
if(qos_rule.oc == ROC_CREATE_NEW_QOS_RULE ||
ROC_MODIFY_QOS_RULE_ADD_PF ||
ROC_MODIFY_QOS_RULE_REPLACE_PF) {
pf.pf_type.type_1.pf_dir = (*(buffer + offset) & 0x30) >> 4;
pf.pf_type.type_1.pf_id = *(buffer + offset++) & 0x0F;
pf.pf_type.type_1.length = *(buffer + offset++);
offset += (qos_rule.nb_pf * pf.pf_type.type_1.length); /* Ommit the Packet filter List */
} else if (qos_rule.oc == ROC_MODIFY_QOS_RULE_DELETE_PF) {
offset += qos_rule.nb_pf;
}
}
qos_rule.prcd = *(buffer + offset++);
qos_rule.qfi = *(buffer + offset++);
psea_msg.sess_ambr.length = *(buffer + offset++);
offset += psea_msg.sess_ambr.length; /* Ommit the Seassion-AMBR */
/* Optional Presence IEs */
uint8_t psea_iei = *(buffer + offset++);
while(offset < msg_length) {
switch (psea_iei) {
case IEI_5GSM_CAUSE: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received 5GSM Cause IEI\n");
offset++;
break;
case IEI_PDU_ADDRESS:
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received PDU Address IE\n");
psea_msg.pdu_addr_ie.pdu_length = *(buffer + offset++);
psea_msg.pdu_addr_ie.pdu_type = *(buffer + offset++);
if (psea_msg.pdu_addr_ie.pdu_type == PDU_SESSION_TYPE_IPV4) {
psea_msg.pdu_addr_ie.pdu_addr_oct1 = *(buffer + offset++);
psea_msg.pdu_addr_ie.pdu_addr_oct2 = *(buffer + offset++);
psea_msg.pdu_addr_ie.pdu_addr_oct3 = *(buffer + offset++);
psea_msg.pdu_addr_ie.pdu_addr_oct4 = *(buffer + offset++);
nas_getparams();
sprintf(baseNetAddress, "%d.%d", psea_msg.pdu_addr_ie.pdu_addr_oct1, psea_msg.pdu_addr_ie.pdu_addr_oct2);
nas_config(1, psea_msg.pdu_addr_ie.pdu_addr_oct3, psea_msg.pdu_addr_ie.pdu_addr_oct4, "oaitun_ue");
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received UE IP: %d.%d.%d.%d\n",
psea_msg.pdu_addr_ie.pdu_addr_oct1,
psea_msg.pdu_addr_ie.pdu_addr_oct2,
psea_msg.pdu_addr_ie.pdu_addr_oct3,
psea_msg.pdu_addr_ie.pdu_addr_oct4);
} else {
offset += psea_msg.pdu_addr_ie.pdu_length;
}
psea_iei = *(buffer + offset++);
break;
case IEI_RQ_TIMER_VALUE: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received RQ timer value IE\n");
offset++; /* TS 24.008 10.5.7.3 */
psea_iei = *(buffer + offset++);
break;
case IEI_SNSSAI: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received S-NSSAI IE\n");
uint8_t snssai_length = *(buffer + offset);
offset += (snssai_length + sizeof(snssai_length));
psea_iei = *(buffer + offset++);
break;
case IEI_ALWAYSON_PDU: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received Always-on PDU Session indication IE\n");
offset++;
psea_iei = *(buffer + offset++);
break;
case IEI_MAPPED_EPS: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received Mapped EPS bearer context IE\n");
uint16_t mapped_eps_length = htons(*(uint16_t *)(buffer + offset));
offset += mapped_eps_length;
psea_iei = *(buffer + offset++);
break;
case IEI_EAP_MSG: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received EAP message IE\n");
uint16_t eap_length = htons(*(uint16_t *)(buffer + offset));
offset += (eap_length + sizeof(eap_length));
psea_iei = *(buffer + offset++);
break;
case IEI_AUTH_QOS_DESC: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received Authorized QoS flow descriptions IE\n");
psea_msg.qos_fd_ie.length = htons(*(uint16_t *)(buffer + offset));
offset += (psea_msg.qos_fd_ie.length + sizeof(psea_msg.qos_fd_ie.length));
psea_iei = *(buffer + offset++);
break;
case IEI_EXT_CONF_OPT: /* Ommited */
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received Extended protocol configuration options IE\n");
psea_msg.ext_pp_ie.length = htons(*(uint16_t *)(buffer + offset));
offset += (psea_msg.ext_pp_ie.length + sizeof(psea_msg.ext_pp_ie.length ));
psea_iei = *(buffer + offset++);
break;
case IEI_DNN:
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Received DNN IE\n");
psea_msg.dnn_ie.dnn_length = *(buffer + offset++);
char apn[APN_MAX_LEN];
if(psea_msg.dnn_ie.dnn_length <= APN_MAX_LEN &&
psea_msg.dnn_ie.dnn_length >= APN_MIN_LEN) {
for (int i = 0 ; i < psea_msg.dnn_ie.dnn_length ; ++i)
apn[i] = *(buffer + offset + i);
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - APN: %s\n", apn);
} else
LOG_E(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - DNN IE has invalid length\n");
offset = msg_length;
break;
default:
LOG_T(NAS, "PDU SESSION ESTABLISHMENT ACCEPT - Not known IE\n");
offset = msg_length;
break;
}
}
set_qfi_pduid(qos_rule.qfi, psea_msg.pdu_id);
return;
}
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