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Trigger deregistration

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This commit is contained in:
Robert Schmidt
2023-03-28 14:12:05 +02:00
parent a0318fb413
commit 4700dde2ae
7 changed files with 86 additions and 0 deletions
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executables/nr-uesoftmodem.c
+7
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@@ -397,6 +397,12 @@ void *rrc_enb_process_msg(void *notUsed) {
return NULL;
}
static void trigger_deregistration(int signal)
{
MessageDef *msg = itti_alloc_new_message(TASK_RRC_UE_SIM, 0, NAS_DEREGISTRATION_REQ);
itti_send_msg_to_task(TASK_NAS_NRUE, 0, msg);
}
static void get_channel_model_mode() {
paramdef_t GNBParams[] = GNBPARAMS_DESC;
config_get(GNBParams, sizeof(GNBParams)/sizeof(paramdef_t), NULL);
@@ -553,6 +559,7 @@ int main( int argc, char **argv ) {
sleep(2);
config_check_unknown_cmdlineopt(CONFIG_CHECKALLSECTIONS);
signal(SIGUSR2, trigger_deregistration);
// wait for end of program
printf("Entering ITTI signals handler\n");
printf("TYPE <CTRL-C> TO TERMINATE\n");
openair2/COMMON/as_message.h
+7
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@@ -327,6 +327,13 @@ typedef struct nas_establish_req_s {
as_nas_info_t initialNasMsg; /* Initial NAS message to transfer */
} nas_establish_req_t;
/*
* fill me
*/
typedef struct nas_deregistration_req_s {
// fill me
} nas_deregistration_req_t;
/*
* AS->NAS - NAS signalling connection establishment indication
* AS transfers the initial NAS message to the NAS.
openair2/COMMON/rrc_messages_def.h
+1
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@@ -62,6 +62,7 @@ MESSAGE_DEF(NAS_KENB_REFRESH_REQ, MESSAGE_PRIORITY_MED, NasKenbRefre
MESSAGE_DEF(NAS_CELL_SELECTION_REQ, MESSAGE_PRIORITY_MED, NasCellSelectionReq, nas_cell_selection_req)
MESSAGE_DEF(NAS_CONN_ESTABLI_REQ, MESSAGE_PRIORITY_MED, NasConnEstabliReq, nas_conn_establi_req)
MESSAGE_DEF(NAS_UPLINK_DATA_REQ, MESSAGE_PRIORITY_MED, NasUlDataReq, nas_ul_data_req)
MESSAGE_DEF(NAS_DEREGISTRATION_REQ, MESSAGE_PRIORITY_MED, NasDeregistrationReq, nas_deregistration_req)
MESSAGE_DEF(NAS_RAB_ESTABLI_RSP, MESSAGE_PRIORITY_MED, NasRabEstRsp, nas_rab_est_rsp)
openair2/COMMON/rrc_messages_types.h
+2
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@@ -75,6 +75,7 @@
#define NAS_CELL_SELECTION_REQ(mSGpTR) (mSGpTR)->ittiMsg.nas_cell_selection_req
#define NAS_CONN_ESTABLI_REQ(mSGpTR) (mSGpTR)->ittiMsg.nas_conn_establi_req
#define NAS_UPLINK_DATA_REQ(mSGpTR) (mSGpTR)->ittiMsg.nas_ul_data_req
#define NAS_DEREGISTRATION_REQ(mSGpTR) (mSGpTR)->ittiMsg.nas_deregistration_req
#define NAS_RAB_ESTABLI_RSP(mSGpTR) (mSGpTR)->ittiMsg.nas_rab_est_rsp
@@ -441,6 +442,7 @@ typedef kenb_refresh_req_t NasKenbRefreshReq;
typedef cell_info_req_t NasCellSelectionReq;
typedef nas_establish_req_t NasConnEstabliReq;
typedef ul_info_transfer_req_t NasUlDataReq;
typedef nas_deregistration_req_t NasDeregistrationReq;
typedef rab_establish_rsp_t NasRabEstRsp;
openair3/NAS/COMMON/NR_NAS_defs.h
+6
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@@ -364,6 +364,12 @@ typedef struct __attribute__((packed)) {
} securityModeCommand_t;
typedef struct __attribute__((packed)) {
Extendedprotocoldiscriminator_t epd: 8;
Security_header_t sh: 8;
SGSmobilitymanagementmessages_t mt: 8;
} deregistrationRequestUEOriginating_t;
typedef struct {
uicc_t *uicc;
} nr_user_nas_t;
openair3/NAS/NR_UE/nr_nas_msg_sim.c
+60
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@@ -43,6 +43,7 @@
#include "PduSessionEstablishRequest.h"
#include "PduSessionEstablishmentAccept.h"
#include "RegistrationAccept.h"
#include "FGSDeregistrationRequestUEOriginating.h"
#include "intertask_interface.h"
#include "openair2/RRC/NAS/nas_config.h"
#include <openair3/NAS/COMMON/NR_NAS_defs.h>
@@ -184,6 +185,9 @@ int mm_msg_encode(MM_msg *mm_msg, uint8_t *buffer, uint32_t len) {
case FGS_UPLINK_NAS_TRANSPORT:
encode_result = encode_fgs_uplink_nas_transport(&mm_msg->uplink_nas_transport, buffer, len);
break;
case FGS_DEREGISTRATION_REQUEST_UE_ORIGINATING:
encode_result = encode_fgs_deregistration_request_ue_originating(&mm_msg->fgs_deregistration_request_ue_originating, buffer, len);
break;
default:
LOG_TRACE(ERROR, "EMM-MSG - Unexpected message type: 0x%x",
mm_msg->header.message_type);
@@ -721,6 +725,53 @@ void decodeDownlinkNASTransport(as_nas_info_t *initialNasMsg, uint8_t * pdu_buff
}
}
static void generateDeregistrationRequest(nr_ue_nas_t *nas, as_nas_info_t *initialNasMsg, const nas_deregistration_req_t *req)
{
fgs_nas_message_t nas_msg = {0};
fgs_nas_message_security_protected_t *sp_msg;
sp_msg = &nas_msg.security_protected;
sp_msg->header.protocol_discriminator = FGS_MOBILITY_MANAGEMENT_MESSAGE;
sp_msg->header.security_header_type = INTEGRITY_PROTECTED_AND_CIPHERED;
sp_msg->header.message_authentication_code = 0;
sp_msg->header.sequence_number = 2;
int size = sizeof(fgs_nas_message_security_header_t);
fgs_deregistration_request_ue_originating_msg *dereg_req = &sp_msg->plain.mm_msg.fgs_deregistration_request_ue_originating;
dereg_req->protocoldiscriminator = FGS_MOBILITY_MANAGEMENT_MESSAGE;
size += 1;
dereg_req->securityheadertype = INTEGRITY_PROTECTED_AND_CIPHERED_WITH_NEW_SECU_CTX;
size += 1;
dereg_req->messagetype = FGS_DEREGISTRATION_REQUEST_UE_ORIGINATING;
size += 1;
dereg_req->deregistrationtype.switchoff = NORMAL_DEREGISTRATION;
dereg_req->deregistrationtype.reregistration_required = REREGISTRATION_NOT_REQUIRED;
dereg_req->deregistrationtype.access_type = TGPP_ACCESS;
dereg_req->naskeysetidentifier.naskeysetidentifier = 1;
size += 1;
size += fill_guti(&dereg_req->fgsmobileidentity, nas->guti);
// encode the message
initialNasMsg->data = calloc(size, sizeof(Byte_t));
int security_header_len = nas_protected_security_header_encode((char *)(initialNasMsg->data), &nas_msg.header, size);
initialNasMsg->length = security_header_len + mm_msg_encode(&sp_msg->plain.mm_msg, (uint8_t *)(initialNasMsg->data + security_header_len), size - security_header_len);
nas_stream_cipher_t stream_cipher = {
.key = nas->security.knas_int,
.key_length = 16,
.count = nas->security.mm_counter++,
.bearer = 1,
.direction = 0,
.message = (unsigned char *)(initialNasMsg->data + 6),
.blength = (initialNasMsg->length - 6) << 3, /* length in bits */
};
uint8_t mac[4];
nas_stream_encrypt_eia2(&stream_cipher, mac);
for(int i = 0; i < 4; i++)
initialNasMsg->data[2 + i] = mac[i];
}
static void generatePduSessionEstablishRequest(nr_ue_nas_t *nas, as_nas_info_t *initialNasMsg)
{
//wait send RegistrationComplete
@@ -959,6 +1010,15 @@ void *nas_nrue_task(void *args_p)
break;
case NAS_DEREGISTRATION_REQ: {
LOG_I(NAS, "[UE %ld] Received %s\n", instance, ITTI_MSG_NAME(msg_p));
nas_deregistration_req_t *req = &NAS_DEREGISTRATION_REQ(msg_p);
as_nas_info_t initialNasMsg = {0};
generateDeregistrationRequest(nas, &initialNasMsg, req);
send_nas_uplink_data_req(instance, &initialNasMsg);
}
break;
case NAS_DOWNLINK_DATA_IND:
{
LOG_I(NAS,
openair3/NAS/NR_UE/nr_nas_msg_sim.h
+3
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@@ -36,6 +36,7 @@
#include "FGSIdentityResponse.h"
#include "FGSAuthenticationResponse.h"
#include "FGSNASSecurityModeComplete.h"
#include "FGSDeregistrationRequestUEOriginating.h"
#include "RegistrationComplete.h"
#include "as_message.h"
#include "FGSUplinkNasTransport.h"
@@ -50,6 +51,7 @@
#define REGISTRATION_REQUEST 0b01000001 /* 65 = 0x41 */
#define REGISTRATION_ACCEPT 0b01000010 /* 66 = 0x42 */
#define REGISTRATION_COMPLETE 0b01000011 /* 67 = 0x43 */
#define FGS_DEREGISTRATION_REQUEST_UE_ORIGINATING 0b01000101
#define FGS_AUTHENTICATION_REQUEST 0b01010110 /* 86 = 0x56 */
#define FGS_AUTHENTICATION_RESPONSE 0b01010111 /* 87 = 0x57 */
#define FGS_IDENTITY_REQUEST 0b01011011 /* 91 = 0x5b */
@@ -117,6 +119,7 @@ typedef union {
registration_request_msg registration_request;
fgs_identiy_response_msg fgs_identity_response;
fgs_authentication_response_msg fgs_auth_response;
fgs_deregistration_request_ue_originating_msg fgs_deregistration_request_ue_originating;
fgs_security_mode_complete_msg fgs_security_mode_complete;
registration_complete_msg registration_complete;
fgs_uplink_nas_transport_msg uplink_nas_transport;