sysmocom
/
open5gs
forked from acouzens/open5gs
11
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

update it

This commit is contained in:
Sukchan Lee 2017-03-26 14:57:33 +09:00
parent b588104b58
commit 8a3037a6fa
12 changed files with 393 additions and 325 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/mme/Makefile.am
View File

@ -5,7 +5,7 @@ noinst_LTLIBRARIES = libmme.la
libmme_la_SOURCES = \
kdf.h kasumi.h snow_3g.h zuc.h \
event.h context.h \
s1ap_build.h s1ap_conv.h s1ap_path.h \
s1ap_build.h s1ap_handler.h s1ap_conv.h s1ap_path.h \
nas_conv.h nas_security.h \
s11_path.h \
sm.h s6a_sm.h
@ -13,7 +13,7 @@ libmme_la_SOURCES = \
nodist_libmme_la_SOURCES = \
kdf.c kasumi.c snow_3g.c zuc.c \
init.c event.c context.c \
s1ap_build.c s1ap_conv.c s1ap_path.c \
s1ap_build.c s1ap_handler.c s1ap_conv.c s1ap_path.c \
nas_conv.c nas_security.c \
s11_path.c \
mme_sm.c enb_s1ap_sm.c ue_emm_sm.c s6a_sm.c

137
src/mme/emm_handler.c Normal file
View File

@ -0,0 +1,137 @@
#define TRACE_MODULE _emm_handler
#include "core_debug.h"
#include "3gpp_conv.h"
#include "s1ap_message.h"
#include "nas_message.h"
#include "sm.h"
#include "context.h"
#include "event.h"
#include "kdf.h"
#include "nas_security.h"
#include "s1ap_path.h"
#include "s1ap_conv.h"
#include "nas_conv.h"
#include "s6a_sm.h"
void emm_handle_attach_request(
ue_ctx_t *ue, nas_attach_request_t *attach_request)
{
nas_eps_mobile_identity_t *eps_mobile_identity =
&attach_request->eps_mobile_identity;
switch(eps_mobile_identity->imsi.type_of_identity)
{
case NAS_EPS_MOBILE_IDENTITY_IMSI:
{
plmn_id_t *plmn_id = &mme_self()->plmn_id;
if (attach_request->presencemask &
NAS_ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_PRESENT)
{
nas_tracking_area_identity_t *last_visited_registered_tai =
&attach_request->last_visited_registered_tai;
plmn_id = &last_visited_registered_tai->plmn_id;
}
nas_imsi_bcd_to_buffer(
&eps_mobile_identity->imsi, eps_mobile_identity->length,
ue->imsi, &ue->imsi_len);
memcpy(&ue->ue_network_capability,
&attach_request->ue_network_capability,
sizeof(attach_request->ue_network_capability));
memcpy(&ue->ms_network_capability,
&attach_request->ms_network_capability,
sizeof(attach_request->ms_network_capability));
d_assert(ue->imsi, return,);
d_info("[NAS] Attach request : UE[%s] --> EMM", ue->imsi);
s6a_send_auth_info_req(ue, plmn_id);
break;
}
default:
{
d_warn("Not implemented(type:%d)",
eps_mobile_identity->imsi.type_of_identity);
return;
}
}
}
void emm_handle_authentication_response(
ue_ctx_t *ue, nas_authentication_response_t *authentication_response)
{
nas_authentication_response_parameter_t *authentication_response_parameter =
&authentication_response->authentication_response_parameter;
nas_message_t message;
pkbuf_t *sendbuf = NULL;
nas_security_mode_command_t *security_mode_command =
&message.security_mode_command;
nas_security_algorithms_t *selected_nas_security_algorithms =
&security_mode_command->selected_nas_security_algorithms;
nas_key_set_identifier_t *nas_key_set_identifier =
&security_mode_command->nas_key_set_identifier;
nas_ue_security_capability_t *replayed_ue_security_capabilities =
&security_mode_command->replayed_ue_security_capabilities;
d_assert(ue, return, "Null param");
if (authentication_response_parameter->length != ue->xres_len ||
memcmp(authentication_response_parameter->res,
ue->xres, ue->xres_len) != 0)
{
d_error("authentication failed");
return;
}
d_assert(ue->imsi, return, );
d_info("[NAS] Authentication response : UE[%s] --> EMM", ue->imsi);
memset(&message, 0, sizeof(message));
message.h.protocol_discriminator = NAS_PROTOCOL_DISCRIMINATOR_EMM;
message.h.message_type = NAS_SECURITY_MODE_COMMAND;
selected_nas_security_algorithms->type_of_ciphering_algorithm =
mme_self()->selected_enc_algorithm;
selected_nas_security_algorithms->type_of_integrity_protection_algorithm =
mme_self()->selected_int_algorithm;
nas_key_set_identifier->tsc = 0;
nas_key_set_identifier->nas_key_set_identifier = 0;
replayed_ue_security_capabilities->length =
sizeof(replayed_ue_security_capabilities->eea) +
sizeof(replayed_ue_security_capabilities->eia) +
sizeof(replayed_ue_security_capabilities->uea) +
sizeof(replayed_ue_security_capabilities->uia) +
sizeof(replayed_ue_security_capabilities->gea);
replayed_ue_security_capabilities->eea = ue->ue_network_capability.eea;
replayed_ue_security_capabilities->eia = ue->ue_network_capability.eia;
replayed_ue_security_capabilities->uea = ue->ue_network_capability.uea;
replayed_ue_security_capabilities->uia = ue->ue_network_capability.uia;
replayed_ue_security_capabilities->gea =
(ue->ms_network_capability.gea1 << 6) |
ue->ms_network_capability.extended_gea;
mme_kdf_nas(MME_KDF_NAS_INT_ALG, mme_self()->selected_int_algorithm,
ue->kasme, ue->knas_int);
mme_kdf_nas(MME_KDF_NAS_ENC_ALG, mme_self()->selected_enc_algorithm,
ue->kasme, ue->knas_enc);
message.h.security_header_type =
NAS_SECURITY_HEADER_INTEGRITY_PROTECTED_AND_NEW_SECURITY_CONTEXT;
d_assert(nas_security_encode(&sendbuf, ue, &message) == CORE_OK &&
sendbuf,,);
nas_send_s1ap_to_enb(ue, sendbuf);
d_assert(ue->imsi, return,);
d_info("[NAS] Security mode command : UE[%s] <-- EMM", ue->imsi);
}

20
src/mme/emm_handler.h Normal file
View File

@ -0,0 +1,20 @@
#ifndef __EMM_HANDLER_H__
#define __EMM_HANDLER_H__
#include "context.h"
#include "nas_message.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
CORE_DECLARE(void) emm_handle_attach_request(
ue_ctx_t *ue, nas_attach_request_t *attach_request);
CORE_DECLARE(void) emm_handle_authentication_response(
ue_ctx_t *ue, nas_authentication_response_t *authentication_response);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __EMM_HANDLER_H__ */

151
src/mme/enb_s1ap_sm.c
View File

@ -7,18 +7,7 @@
#include "event.h"
#include "s1ap_build.h"
#include "s1ap_conv.h"
#include "s1ap_path.h"
#include "nas_message.h"
static void enb_s1ap_handle_s1_setup_request(
enb_ctx_t *enb, s1ap_message_t *message);
static void enb_s1ap_handle_initial_ue_message(
enb_ctx_t *enb, s1ap_message_t *message);
static void enb_s1ap_handle_uplink_nas_transport(
enb_ctx_t *enb, s1ap_message_t *message);
static void enb_s1ap_send_to_ue(ue_ctx_t *ue, S1ap_NAS_PDU_t *nasPdu);
#include "s1ap_handler.h"
void enb_s1ap_state_initial(enb_s1ap_sm_t *s, event_t *e)
{
@ -78,17 +67,17 @@ void enb_s1ap_state_operational(enb_s1ap_sm_t *s, event_t *e)
{
case S1ap_ProcedureCode_id_S1Setup :
{
enb_s1ap_handle_s1_setup_request(enb, &message);
s1ap_handle_s1_setup_request(enb, &message);
break;
}
case S1ap_ProcedureCode_id_initialUEMessage :
{
enb_s1ap_handle_initial_ue_message(enb, &message);
s1ap_handle_initial_ue_message(enb, &message);
break;
}
case S1ap_ProcedureCode_id_uplinkNASTransport :
{
enb_s1ap_handle_uplink_nas_transport(enb, &message);
s1ap_handle_uplink_nas_transport(enb, &message);
break;
}
default:
@ -161,135 +150,3 @@ void enb_s1ap_state_exception(enb_s1ap_sm_t *s, event_t *e)
}
}
static void enb_s1ap_handle_s1_setup_request(
enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
S1ap_S1SetupRequestIEs_t *ies = NULL;
pkbuf_t *sendbuf = NULL;
c_uint32_t enb_id;
d_assert(enb, return, "Null param");
d_assert(enb->s1ap_sock, return, "Null param");
d_assert(message, return, "Null param");
ies = &message->s1ap_S1SetupRequestIEs;
d_assert(ies, return, "Null param");
s1ap_ENB_ID_to_uint32(&ies->global_ENB_ID.eNB_ID, &enb_id);
#if 0 /* FIXME : does it needed? */
if (mme_ctx_enb_find_by_enb_id(enb_id))
{
S1ap_Cause_t cause;
d_error("eNB-id[0x%x] duplicated from [%s]", enb_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf));
cause.present = S1ap_Cause_PR_protocol;
cause.choice.protocol =
S1ap_CauseProtocol_message_not_compatible_with_receiver_state;
rv = s1ap_build_setup_failure(&sendbuf, cause);
}
#endif
d_assert(enb->s1ap_sock, return,);
d_info("[S1AP] S1SetupRequest : eNB[%s:%d] --> MME",
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb_id);
enb->enb_id = enb_id;
d_assert(s1ap_build_setup_rsp(&sendbuf) == CORE_OK,
return, "build error");
d_assert(s1ap_send_to_enb(enb, sendbuf) == CORE_OK, , "send error");
d_assert(enb->s1ap_sock, return,);
d_info("[S1AP] S1SetupResponse: eNB[%s:%d] <-- MME",
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb_id);
}
static void enb_s1ap_handle_initial_ue_message(
enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
ue_ctx_t *ue = NULL;
S1ap_InitialUEMessage_IEs_t *ies = NULL;
d_assert(enb, return, "Null param");
ies = &message->s1ap_InitialUEMessage_IEs;
d_assert(ies, return, "Null param");
ue = mme_ctx_ue_find_by_enb_ue_s1ap_id(enb, ies->eNB_UE_S1AP_ID);
if (!ue)
{
ue = mme_ctx_ue_add(enb);
d_assert(ue, return, "Null param");
ue->enb_ue_s1ap_id = ies->eNB_UE_S1AP_ID;
}
else
{
d_warn("Duplicated: eNB[0x%x] sends "
"Initial-UE Message[eNB-UE-S1AP-ID(%d)]",
enb->enb_id, ue->enb_ue_s1ap_id);
}
d_assert(enb->s1ap_sock, mme_ctx_ue_remove(ue);return,);
d_info("[S1AP] InitialUEMessage : UE[eNB-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb->enb_id);
fsm_create((fsm_t*)&ue->emm_sm,
ue_emm_state_initial, ue_emm_state_final);
ue->emm_sm.ctx = ue;
fsm_init((fsm_t*)&ue->emm_sm, 0);
enb_s1ap_send_to_ue(ue, &ies->nas_pdu);
}
static void enb_s1ap_handle_uplink_nas_transport(
enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
ue_ctx_t *ue = NULL;
S1ap_UplinkNASTransport_IEs_t *ies = NULL;
ies = &message->s1ap_UplinkNASTransport_IEs;
d_assert(ies, return, "Null param");
ue = mme_ctx_ue_find_by_enb_ue_s1ap_id(enb, ies->eNB_UE_S1AP_ID);
d_assert(ue, return, "Null param");
d_info("[S1AP] uplinkNASTransport : UE[eNB-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb->enb_id);
enb_s1ap_send_to_ue(ue, &ies->nas_pdu);
}
static void enb_s1ap_send_to_ue(ue_ctx_t *ue, S1ap_NAS_PDU_t *nasPdu)
{
pkbuf_t *sendbuf = NULL;
event_t e;
d_assert(nasPdu, return, "Null param");
/* The Packet Buffer(pkbuf_t) for NAS message MUST make a HEADROOM.
* When calculating AES_CMAC, we need to use the headroom of the packet. */
sendbuf = pkbuf_alloc(NAS_HEADROOM, nasPdu->size);
d_assert(sendbuf, return, "Null param");
memcpy(sendbuf->payload, nasPdu->buf, nasPdu->size);
event_set(&e, EVT_MSG_UE_EMM);
event_set_param1(&e, (c_uintptr_t)ue);
event_set_param2(&e, (c_uintptr_t)sendbuf);
event_send(mme_self()->queue_id, &e);
}

42
src/mme/nas_build.c Normal file
View File

@ -0,0 +1,42 @@
#define TRACE_MODULE _nas_build
#include "nas_message.h"
#include "s1ap_message.h"
void nas_send_s1ap_to_enb(ue_ctx_t *ue, pkbuf_t *pkbuf)
{
char buf[INET_ADDRSTRLEN];
int encoded;
s1ap_message_t message;
S1ap_DownlinkNASTransport_IEs_t *ies =
&message.s1ap_DownlinkNASTransport_IEs;
S1ap_NAS_PDU_t *nasPdu = &ies->nas_pdu;
pkbuf_t *sendbuf = NULL;
memset(&message, 0, sizeof(s1ap_message_t));
ies->mme_ue_s1ap_id = ue->mme_ue_s1ap_id;
ies->eNB_UE_S1AP_ID = ue->enb_ue_s1ap_id;
nasPdu->size = pkbuf->len;
nasPdu->buf = core_calloc(nasPdu->size, sizeof(c_uint8_t));
memcpy(nasPdu->buf, pkbuf->payload, nasPdu->size);
message.procedureCode = S1ap_ProcedureCode_id_downlinkNASTransport;
message.direction = S1AP_PDU_PR_initiatingMessage;
encoded = s1ap_encode_pdu(&sendbuf, &message);
s1ap_free_pdu(&message);
d_assert(sendbuf && encoded >= 0,,);
d_assert(s1ap_send_to_enb(ue->enb, sendbuf) == CORE_OK,,);
pkbuf_free(pkbuf);
d_assert(ue->enb,,);
d_info("[S1AP] downlinkNASTransport : "
"UE[eNB-UE-S1AP-ID(%d)] <-- eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&ue->enb->s1ap_sock->remote.sin_addr.s_addr, buf),
ue->enb->enb_id);
}

17
src/mme/nas_build.h Normal file
View File

@ -0,0 +1,17 @@
#ifndef __NAS_BUILD_H__
#define __NAS_BUILD_H__
#include "core_pkbuf.h"
#include "context.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
CORE_DECLARE(void) nas_send_s1ap_to_enb(ue_ctx_t *ue, pkbuf_t *pkbuf);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __NAS_BUILD_H__ */

21
src/mme/s1ap_build.c
View File

@ -4,6 +4,27 @@
#include "context.h"
#include "s1ap_build.h"
#include "s1ap_conv.h"
#include "nas_message.h"
void s1ap_send_nas_to_emm(ue_ctx_t *ue, S1ap_NAS_PDU_t *nasPdu)
{
pkbuf_t *sendbuf = NULL;
event_t e;
d_assert(nasPdu, return, "Null param");
/* The Packet Buffer(pkbuf_t) for NAS message MUST make a HEADROOM.
* When calculating AES_CMAC, we need to use the headroom of the packet. */
sendbuf = pkbuf_alloc(NAS_HEADROOM, nasPdu->size);
d_assert(sendbuf, return, "Null param");
memcpy(sendbuf->payload, nasPdu->buf, nasPdu->size);
event_set(&e, EVT_MSG_UE_EMM);
event_set_param1(&e, (c_uintptr_t)ue);
event_set_param2(&e, (c_uintptr_t)sendbuf);
event_send(mme_self()->queue_id, &e);
}
status_t s1ap_build_setup_rsp(pkbuf_t **pkbuf)
{

2
src/mme/s1ap_build.h
View File

@ -7,6 +7,8 @@
extern "C" {
#endif /* __cplusplus */
CORE_DECLARE(void) s1ap_send_nas_to_emm(ue_ctx_t *ue, S1ap_NAS_PDU_t *nasPdu);
CORE_DECLARE(status_t) s1ap_build_setup_rsp(pkbuf_t **pkbuf);
CORE_DECLARE(status_t) s1ap_build_setup_failure(
pkbuf_t **pkbuf, S1ap_Cause_t cause);

120
src/mme/s1ap_handler.c Normal file
View File

@ -0,0 +1,120 @@
#define TRACE_MODULE _s1ap_handler
#include "core_debug.h"
#include "context.h"
#include "s1ap_conv.h"
#include "s1ap_build.h"
#include "s1ap_handler.h"
#include "s1ap_path.h"
void s1ap_handle_s1_setup_request(enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
S1ap_S1SetupRequestIEs_t *ies = NULL;
pkbuf_t *sendbuf = NULL;
c_uint32_t enb_id;
d_assert(enb, return, "Null param");
d_assert(enb->s1ap_sock, return, "Null param");
d_assert(message, return, "Null param");
ies = &message->s1ap_S1SetupRequestIEs;
d_assert(ies, return, "Null param");
s1ap_ENB_ID_to_uint32(&ies->global_ENB_ID.eNB_ID, &enb_id);
#if 0 /* FIXME : does it needed? */
if (mme_ctx_enb_find_by_enb_id(enb_id))
{
S1ap_Cause_t cause;
d_error("eNB-id[0x%x] duplicated from [%s]", enb_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf));
cause.present = S1ap_Cause_PR_protocol;
cause.choice.protocol =
S1ap_CauseProtocol_message_not_compatible_with_receiver_state;
rv = s1ap_build_setup_failure(&sendbuf, cause);
}
#endif
d_assert(enb->s1ap_sock, return,);
d_info("[S1AP] S1SetupRequest : eNB[%s:%d] --> MME",
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb_id);
enb->enb_id = enb_id;
d_assert(s1ap_build_setup_rsp(&sendbuf) == CORE_OK,
return, "build error");
d_assert(s1ap_send_to_enb(enb, sendbuf) == CORE_OK, , "send error");
d_assert(enb->s1ap_sock, return,);
d_info("[S1AP] S1SetupResponse: eNB[%s:%d] <-- MME",
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb_id);
}
void s1ap_handle_initial_ue_message(enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
ue_ctx_t *ue = NULL;
S1ap_InitialUEMessage_IEs_t *ies = NULL;
d_assert(enb, return, "Null param");
ies = &message->s1ap_InitialUEMessage_IEs;
d_assert(ies, return, "Null param");
ue = mme_ctx_ue_find_by_enb_ue_s1ap_id(enb, ies->eNB_UE_S1AP_ID);
if (!ue)
{
ue = mme_ctx_ue_add(enb);
d_assert(ue, return, "Null param");
ue->enb_ue_s1ap_id = ies->eNB_UE_S1AP_ID;
}
else
{
d_warn("Duplicated: eNB[0x%x] sends "
"Initial-UE Message[eNB-UE-S1AP-ID(%d)]",
enb->enb_id, ue->enb_ue_s1ap_id);
}
d_assert(enb->s1ap_sock, mme_ctx_ue_remove(ue);return,);
d_info("[S1AP] InitialUEMessage : UE[eNB-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb->enb_id);
fsm_create((fsm_t*)&ue->emm_sm,
ue_emm_state_initial, ue_emm_state_final);
ue->emm_sm.ctx = ue;
fsm_init((fsm_t*)&ue->emm_sm, 0);
s1ap_send_nas_to_emm(ue, &ies->nas_pdu);
}
void s1ap_handle_uplink_nas_transport(
enb_ctx_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
ue_ctx_t *ue = NULL;
S1ap_UplinkNASTransport_IEs_t *ies = NULL;
ies = &message->s1ap_UplinkNASTransport_IEs;
d_assert(ies, return, "Null param");
ue = mme_ctx_ue_find_by_enb_ue_s1ap_id(enb, ies->eNB_UE_S1AP_ID);
d_assert(ue, return, "Null param");
d_info("[S1AP] uplinkNASTransport : UE[eNB-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb->enb_id);
s1ap_send_nas_to_emm(ue, &ies->nas_pdu);
}

21
src/mme/s1ap_handler.h Normal file
View File

@ -0,0 +1,21 @@
#ifndef __S1AP_HANDLER_H__
#define __S1AP_HANDLER_H__
#include "s1ap_message.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
CORE_DECLARE(void) s1ap_handle_s1_setup_request(
enb_ctx_t *enb, s1ap_message_t *message);
CORE_DECLARE(void) s1ap_handle_initial_ue_message(
enb_ctx_t *enb, s1ap_message_t *message);
CORE_DECLARE(void) s1ap_handle_uplink_nas_transport(
enb_ctx_t *enb, s1ap_message_t *message);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __S1AP_HANDLER_H__ */

2
src/mme/s6a_sm.c
View File

@ -1,4 +1,4 @@
#define TRACE_MODULE _s6a_auth
#define TRACE_MODULE _s6a_sm
#include "core_debug.h"
#include "core_pool.h"

181
src/mme/ue_emm_sm.c
View File

@ -2,27 +2,14 @@
#include "core_debug.h"
#include "3gpp_conv.h"
#include "s1ap_message.h"
#include "nas_message.h"
#include "sm.h"
#include "context.h"
#include "event.h"
#include "kdf.h"
#include "nas_message.h"
#include "nas_security.h"
#include "s1ap_path.h"
#include "s1ap_conv.h"
#include "nas_conv.h"
#include "s6a_sm.h"
static void ue_emm_handle_attach_request(
ue_ctx_t *ue, nas_attach_request_t *attach_request);
static void ue_emm_handle_authentication_response(
ue_ctx_t *ue, nas_authentication_response_t *authentication_response);
static void ue_emm_send_to_enb(ue_ctx_t *ue, pkbuf_t *pkbuf);
#include "nas_build.h"
#include "emm_handler.h"
void ue_emm_state_initial(ue_emm_sm_t *s, event_t *e)
{
@ -78,14 +65,14 @@ void ue_emm_state_operational(ue_emm_sm_t *s, event_t *e)
{
case NAS_ATTACH_REQUEST:
{
ue_emm_handle_attach_request(
emm_handle_attach_request(
ue, &message.attach_request);
break;
}
case NAS_AUTHENTICATION_REQUEST:
{
pkbuf_t *pkbuf = pkbuf_copy(recvbuf);
ue_emm_send_to_enb(ue, pkbuf);
nas_send_s1ap_to_enb(ue, pkbuf);
d_assert(ue->imsi, return,);
d_info("[NAS] Authentication request : UE[%s] <-- EMM",
@ -94,7 +81,7 @@ void ue_emm_state_operational(ue_emm_sm_t *s, event_t *e)
}
case NAS_AUTHENTICATION_RESPONSE:
{
ue_emm_handle_authentication_response(
emm_handle_authentication_response(
ue, &message.authentication_response);
break;
}
@ -148,159 +135,3 @@ void ue_emm_state_exception(ue_emm_sm_t *s, event_t *e)
}
}
}
static void ue_emm_handle_attach_request(
ue_ctx_t *ue, nas_attach_request_t *attach_request)
{
nas_eps_mobile_identity_t *eps_mobile_identity =
&attach_request->eps_mobile_identity;
switch(eps_mobile_identity->imsi.type_of_identity)
{
case NAS_EPS_MOBILE_IDENTITY_IMSI:
{
plmn_id_t *plmn_id = &mme_self()->plmn_id;
if (attach_request->presencemask &
NAS_ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_PRESENT)
{
nas_tracking_area_identity_t *last_visited_registered_tai =
&attach_request->last_visited_registered_tai;
plmn_id = &last_visited_registered_tai->plmn_id;
}
nas_imsi_bcd_to_buffer(
&eps_mobile_identity->imsi, eps_mobile_identity->length,
ue->imsi, &ue->imsi_len);
memcpy(&ue->ue_network_capability,
&attach_request->ue_network_capability,
sizeof(attach_request->ue_network_capability));
memcpy(&ue->ms_network_capability,
&attach_request->ms_network_capability,
sizeof(attach_request->ms_network_capability));
d_assert(ue->imsi, return,);
d_info("[NAS] Attach request : UE[%s] --> EMM", ue->imsi);
s6a_send_auth_info_req(ue, plmn_id);
break;
}
default:
{
d_warn("Not implemented(type:%d)",
eps_mobile_identity->imsi.type_of_identity);
return;
}
}
}
static void ue_emm_handle_authentication_response(
ue_ctx_t *ue, nas_authentication_response_t *authentication_response)
{
nas_authentication_response_parameter_t *authentication_response_parameter =
&authentication_response->authentication_response_parameter;
nas_message_t message;
pkbuf_t *sendbuf = NULL;
nas_security_mode_command_t *security_mode_command =
&message.security_mode_command;
nas_security_algorithms_t *selected_nas_security_algorithms =
&security_mode_command->selected_nas_security_algorithms;
nas_key_set_identifier_t *nas_key_set_identifier =
&security_mode_command->nas_key_set_identifier;
nas_ue_security_capability_t *replayed_ue_security_capabilities =
&security_mode_command->replayed_ue_security_capabilities;
d_assert(ue, return, "Null param");
if (authentication_response_parameter->length != ue->xres_len ||
memcmp(authentication_response_parameter->res,
ue->xres, ue->xres_len) != 0)
{
d_error("authentication failed");
return;
}
d_assert(ue->imsi, return, );
d_info("[NAS] Authentication response : UE[%s] --> EMM", ue->imsi);
memset(&message, 0, sizeof(message));
message.h.protocol_discriminator = NAS_PROTOCOL_DISCRIMINATOR_EMM;
message.h.message_type = NAS_SECURITY_MODE_COMMAND;
selected_nas_security_algorithms->type_of_ciphering_algorithm =
mme_self()->selected_enc_algorithm;
selected_nas_security_algorithms->type_of_integrity_protection_algorithm =
mme_self()->selected_int_algorithm;
nas_key_set_identifier->tsc = 0;
nas_key_set_identifier->nas_key_set_identifier = 0;
replayed_ue_security_capabilities->length =
sizeof(replayed_ue_security_capabilities->eea) +
sizeof(replayed_ue_security_capabilities->eia) +
sizeof(replayed_ue_security_capabilities->uea) +
sizeof(replayed_ue_security_capabilities->uia) +
sizeof(replayed_ue_security_capabilities->gea);
replayed_ue_security_capabilities->eea = ue->ue_network_capability.eea;
replayed_ue_security_capabilities->eia = ue->ue_network_capability.eia;
replayed_ue_security_capabilities->uea = ue->ue_network_capability.uea;
replayed_ue_security_capabilities->uia = ue->ue_network_capability.uia;
replayed_ue_security_capabilities->gea =
(ue->ms_network_capability.gea1 << 6) |
ue->ms_network_capability.extended_gea;
mme_kdf_nas(MME_KDF_NAS_INT_ALG, mme_self()->selected_int_algorithm,
ue->kasme, ue->knas_int);
mme_kdf_nas(MME_KDF_NAS_ENC_ALG, mme_self()->selected_enc_algorithm,
ue->kasme, ue->knas_enc);
message.h.security_header_type =
NAS_SECURITY_HEADER_INTEGRITY_PROTECTED_AND_NEW_SECURITY_CONTEXT;
d_assert(nas_security_encode(&sendbuf, ue, &message) == CORE_OK &&
sendbuf,,);
ue_emm_send_to_enb(ue, sendbuf);
d_assert(ue->imsi, return,);
d_info("[NAS] Security mode command : UE[%s] <-- EMM", ue->imsi);
}
static void ue_emm_send_to_enb(ue_ctx_t *ue, pkbuf_t *pkbuf)
{
char buf[INET_ADDRSTRLEN];
int encoded;
s1ap_message_t message;
S1ap_DownlinkNASTransport_IEs_t *ies =
&message.s1ap_DownlinkNASTransport_IEs;
S1ap_NAS_PDU_t *nasPdu = &ies->nas_pdu;
pkbuf_t *sendbuf = NULL;
memset(&message, 0, sizeof(s1ap_message_t));
ies->mme_ue_s1ap_id = ue->mme_ue_s1ap_id;
ies->eNB_UE_S1AP_ID = ue->enb_ue_s1ap_id;
nasPdu->size = pkbuf->len;
nasPdu->buf = core_calloc(nasPdu->size, sizeof(c_uint8_t));
memcpy(nasPdu->buf, pkbuf->payload, nasPdu->size);
message.procedureCode = S1ap_ProcedureCode_id_downlinkNASTransport;
message.direction = S1AP_PDU_PR_initiatingMessage;
encoded = s1ap_encode_pdu(&sendbuf, &message);
s1ap_free_pdu(&message);
d_assert(sendbuf && encoded >= 0,,);
d_assert(s1ap_send_to_enb(ue->enb, sendbuf) == CORE_OK,,);
pkbuf_free(pkbuf);
d_assert(ue->enb,,);
d_info("[S1AP] downlinkNASTransport : "
"UE[eNB-UE-S1AP-ID(%d)] <-- eNB[%s:%d]",
ue->enb_ue_s1ap_id,
INET_NTOP(&ue->enb->s1ap_sock->remote.sin_addr.s_addr, buf),
ue->enb->enb_id);
}