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c0583be24e77a8a55d48cf30ee73e2b5ed10e527
openairinterface5g/openair3/NAS/NR_UE/5GS/5GMM/IES/FGSMobileIdentity.c
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Guido Casati c0583be24e Migrated NAS 5GS (5GMM & 5GSM) to NR folders and refactor CMakeLists.txt files 
This commit is introducing the following macro changes:

(1) Migrate NAS 5GS lib files to a new 5GS subfolder in NR_UE
    and organize NAS 5GS lib messages into 5GMM and 5GSM subfolders.
    A nested CMake structure was implemented and CMakeLists.txt were
    added whenever necessary. This is effectively separating 5GS
    libraries from LTE libraries.

(2) In order to simplify the separation of 5GS libs from LTE libs,
    remaining dependencies from NAS LTE (e.g. nas_ue_task.c, ue-idx-standalone)
    were removed in the process

(3) ExtendedProtocolDiscriminator.c/.h and SpareHalfOctet.c/.h were deleted
    and affected types were replaced with simple integer types

(4) Cleanup: unused definitions and libs (e.g. LIB_5GNAS_GNB)
    were removed

(5) Update doc/Doxyfile

(6) clang-formatted the migrated files in the process

(7) Update includes of headers in affected files
2025-01-30 15:17:30 +01:00

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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 FGSMobileIdentity.c
* \brief 5GS Mobile Identity for registration request procedures
* \author Yoshio INOUE, Masayuki HARADA
* \email yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com
* \date 2020
* \version 0.1
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include "TLVEncoder.h"
#include "TLVDecoder.h"
#include "FGSMobileIdentity.h"
#define MIN_LEN_FGS_MOBILE_ID_IE 3 // type of identity "No identity"
#define LEN_5G_FGS_TMSI_IE 9
static int decode_guti_5gs_mobile_identity(Guti5GSMobileIdentity_t *guti, const uint8_t *buffer);
static int encode_guti_5gs_mobile_identity(Guti5GSMobileIdentity_t *guti, uint8_t *buffer);
static int encode_suci_5gs_mobile_identity(Suci5GSMobileIdentity_t *suci, uint8_t *buffer);
static int encode_imeisv_5gs_mobile_identity(Imeisv5GSMobileIdentity_t *imeisv, uint8_t *buffer);
int encode_stmsi_5gs_mobile_identity(uint8_t *buffer, Stmsi5GSMobileIdentity_t *stmsi, uint32_t len)
{
// Return if buffer is shorter than min length
if (len < LEN_5G_FGS_TMSI_IE)
return -1;
uint32_t encoded = 0;
// octet 4
*(buffer + encoded) = (DIGIT1 << 4) | ((stmsi->spare & 0x1) << 3) | (stmsi->typeofidentity & 0x7);
encoded++;
// octet 5-6
uint16_t temp = 0x00 | ((stmsi->amfsetid) << 6) | (stmsi->amfpointer & 0x3f);
IES_ENCODE_U16(buffer, encoded, temp);
// octet 7
IES_ENCODE_U32(buffer, encoded, stmsi->tmsi);
return encoded;
}
int decode_stmsi_5gs_mobile_identity(Stmsi5GSMobileIdentity_t *stmsi, const uint8_t *buffer, uint32_t len)
{
int decoded = 0;
uint16_t temp;
// Return if buffer is shorter than min length
if (len < LEN_5G_FGS_TMSI_IE)
return -1;
// Octet 4: spare (bit 3) and type of identity (bits 0-2)
stmsi->digit1 = DIGIT1;
stmsi->spare = (*(buffer + decoded) >> 3) & 0x1;
stmsi->typeofidentity = *(buffer + decoded) & 0x7;
// Validate type of identity
if (stmsi->typeofidentity != FGS_MOBILE_IDENTITY_5GS_TMSI) {
return -1;
}
decoded++;
// Octet 5-6: AMF Set ID (bits 6-15) and AMF Pointer (bits 0-5)
IES_DECODE_U16(buffer, decoded, temp);
stmsi->amfsetid = (temp >> 6) & 0x03ff;
stmsi->amfpointer = temp & 0x3f;
// Octet 7-10: 32-bit TMSI
IES_DECODE_U32(buffer, decoded, stmsi->tmsi);
return decoded;
}
int decode_5gs_mobile_identity(FGSMobileIdentity *fgsmobileidentity, uint8_t iei, const uint8_t *buffer, uint32_t len)
{
int decoded_rc = TLV_DECODE_VALUE_DOESNT_MATCH;
int decoded = 0;
uint8_t ielen = 0;
if (iei > 0) {
CHECK_IEI_DECODER(iei, *buffer);
decoded++;
}
uint16_t tmp;
memcpy(&tmp, buffer + decoded, sizeof(tmp));
ielen = (uint8_t)tmp;
decoded += 2;
CHECK_LENGTH_DECODER(len - decoded, ielen);
uint8_t typeofidentity = *(buffer + decoded) & 0x7;
if (typeofidentity == FGS_MOBILE_IDENTITY_5G_GUTI) {
decoded_rc = decode_guti_5gs_mobile_identity(&fgsmobileidentity->guti, buffer + decoded);
} else {
AssertFatal(false, "Mobile Identity encoding of type %d not implemented\n", typeofidentity);
}
if (decoded_rc < 0) {
return decoded_rc;
}
return (decoded + decoded_rc);
}
int encode_5gs_mobile_identity(FGSMobileIdentity *fgsmobileidentity, uint8_t iei, uint8_t *buffer, uint32_t len)
{
// Return if buffer is shorter than min length
if (len < MIN_LEN_FGS_MOBILE_ID_IE)
return -1;
int encoded_rc = TLV_ENCODE_VALUE_DOESNT_MATCH;
uint32_t encoded = 0;
if (iei > 0) {
*buffer = iei;
encoded++;
}
encoded = encoded + 2;
len -= encoded;
if (fgsmobileidentity->guti.typeofidentity == FGS_MOBILE_IDENTITY_5G_GUTI) {
encoded_rc = encode_guti_5gs_mobile_identity(&fgsmobileidentity->guti, buffer + encoded);
}
if (fgsmobileidentity->suci.typeofidentity == FGS_MOBILE_IDENTITY_SUCI) {
encoded_rc = encode_suci_5gs_mobile_identity(&fgsmobileidentity->suci, buffer + encoded);
}
if (fgsmobileidentity->imeisv.typeofidentity == FGS_MOBILE_IDENTITY_IMEISV) {
encoded_rc = encode_imeisv_5gs_mobile_identity(&fgsmobileidentity->imeisv, buffer + encoded);
}
if (fgsmobileidentity->stmsi.typeofidentity == FGS_MOBILE_IDENTITY_5GS_TMSI) {
encoded_rc = encode_stmsi_5gs_mobile_identity(buffer + encoded, &fgsmobileidentity->stmsi, len);
}
if (encoded_rc < 0) {
return encoded_rc;
}
if (iei > 0) {
uint16_t tmp = htons(encoded + encoded_rc - 3);
memcpy(buffer + 1, &tmp, sizeof(tmp));
} else {
uint16_t tmp = htons(encoded + encoded_rc - 2);
memcpy(buffer, &tmp, sizeof(tmp));
}
return (encoded + encoded_rc);
}
static int decode_guti_5gs_mobile_identity(Guti5GSMobileIdentity_t *guti, const uint8_t *buffer)
{
int decoded = 0;
uint16_t temp;
guti->spare = (*(buffer + decoded) >> 4) & 0xf;
/*
* For the 5G-GUTI, bits 5 to 8 of octet 3 are coded as "1111"
*/
if (guti->spare != 0xf) {
return (TLV_ENCODE_VALUE_DOESNT_MATCH);
}
guti->oddeven = (*(buffer + decoded) >> 3) & 0x1;
/*
* For the 5G-GUTI, bits 4 of octet 3 are coded as "0"
*/
if (guti->oddeven != 0) {
return (TLV_ENCODE_VALUE_DOESNT_MATCH);
}
guti->typeofidentity = *(buffer + decoded) & 0x7;
if (guti->typeofidentity != FGS_MOBILE_IDENTITY_5G_GUTI) {
return (TLV_ENCODE_VALUE_DOESNT_MATCH);
}
decoded++;
guti->mccdigit2 = (*(buffer + decoded) >> 4) & 0xf;
guti->mccdigit1 = *(buffer + decoded) & 0xf;
decoded++;
guti->mncdigit3 = (*(buffer + decoded) >> 4) & 0xf;
guti->mccdigit3 = *(buffer + decoded) & 0xf;
decoded++;
guti->mncdigit2 = (*(buffer + decoded) >> 4) & 0xf;
guti->mncdigit1 = *(buffer + decoded) & 0xf;
decoded++;
guti->amfregionid = *(buffer + decoded);
decoded++;
IES_DECODE_U16(buffer, decoded, temp);
guti->amfsetid = temp >> 3;
guti->amfpointer = temp & 0x3f;
IES_DECODE_U32(buffer, decoded, guti->tmsi);
return decoded;
}
static int encode_guti_5gs_mobile_identity(Guti5GSMobileIdentity_t *guti, uint8_t *buffer)
{
uint32_t encoded = 0;
uint16_t temp;
*(buffer + encoded) = 0xf0 | ((guti->oddeven & 0x1) << 3) | (guti->typeofidentity & 0x7);
encoded++;
*(buffer + encoded) = 0x00 | ((guti->mccdigit2 & 0xf) << 4) | (guti->mccdigit1 & 0xf);
encoded++;
*(buffer + encoded) = 0x00 | ((guti->mncdigit3 & 0xf) << 4) | (guti->mccdigit3 & 0xf);
encoded++;
*(buffer + encoded) = 0x00 | ((guti->mncdigit2 & 0xf) << 4) | (guti->mncdigit1 & 0xf);
encoded++;
*(buffer + encoded) = guti->amfregionid;
encoded++;
temp = 0x00 | ((guti->amfsetid) << 6) | (guti->amfpointer & 0x3f);
IES_ENCODE_U16(buffer, encoded, temp);
IES_ENCODE_U32(buffer, encoded, guti->tmsi);
return encoded;
}
static int encode_suci_5gs_mobile_identity(Suci5GSMobileIdentity_t *suci, uint8_t *buffer)
{
uint32_t encoded = 0;
*(buffer + encoded) = (suci->supiformat << 4) | (suci->typeofidentity);
encoded++;
*(buffer + encoded) = ((suci->mccdigit2 & 0xf) << 4) | (suci->mccdigit1 & 0xf);
encoded++;
*(buffer + encoded) = ((suci->mncdigit3 & 0xf) << 4) | (suci->mccdigit3 & 0xf);
encoded++;
*(buffer + encoded) = ((suci->mncdigit2 & 0xf) << 4) | (suci->mncdigit1 & 0xf);
encoded++;
*(buffer + encoded) = ((suci->routingindicatordigit2 & 0xf) << 4) | (suci->routingindicatordigit1 & 0xf);
encoded++;
*(buffer + encoded) = ((suci->routingindicatordigit4 & 0xf) << 4) | (suci->routingindicatordigit3 & 0xf);
encoded++;
*(buffer + encoded) = 0x00 | (suci->protectionschemeId & 0xf);
encoded++;
*(buffer + encoded) = suci->homenetworkpki;
encoded++;
char *ptr = suci->schemeoutput;
while (ptr < suci->schemeoutput + strlen(suci->schemeoutput)) {
buffer[encoded] = ((*(ptr + 1) - '0') << 4) | (*(ptr) - '0');
encoded++;
ptr += 2;
}
if (strlen(suci->schemeoutput) % 2 == 1)
buffer[encoded++] = ((*(ptr - 1) - '0')) | 0xF0;
return encoded;
}
static int encode_imeisv_5gs_mobile_identity(Imeisv5GSMobileIdentity_t *imeisv, uint8_t *buffer)
{
uint32_t encoded = 0;
*(buffer + encoded) = 0x00 | (imeisv->digittac01 << 4) | (imeisv->oddeven << 3) | (imeisv->typeofidentity);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->digittac03 << 4) | (imeisv->digittac02);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->digittac05 << 4) | (imeisv->digittac04);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->digittac07 << 4) | (imeisv->digittac06);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->digit09 << 4) | (imeisv->digittac08);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->digit11 << 4) | (imeisv->digit10);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->digit13 << 4) | (imeisv->digit12);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->digitsv1 << 4) | (imeisv->digit14);
encoded++;
*(buffer + encoded) = 0x00 | (imeisv->spare << 4) | (imeisv->digitsv2);
encoded++;
return encoded;
}
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