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Merge branch 'master' of https://github.com/acetcom/cellwire 

Conflicts:
	src/mme/emm_handler.c
	src/mme/emm_handler.h
This commit is contained in:
James Park 2017-04-28 14:56:47 +09:00
parent 2939cf1349 337dccff45
commit 62935aac2c
15 changed files with 258 additions and 8 deletions
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96
src/mme/emm_handler.c
View File

@ -16,6 +16,9 @@
#include "s1ap_build.h"
#include "s1ap_path.h"
#include "mme_s11_build.h"
#include "mme_s11_path.h"
void emm_handle_identity_request(mme_ue_t *ue);
void emm_handle_esm_message_container(
@ -156,7 +159,7 @@ void emm_handle_identity_request(mme_ue_t *mme_ue)
ue = mme_ue->enb_ue;
d_assert(ue, return, "Null param");
enb = ue->enb;
d_assert(ue->enb, return, "Null param");
d_assert(enb, return, "Null param");
memset(&message, 0, sizeof(message));
message.emm.h.protocol_discriminator = NAS_PROTOCOL_DISCRIMINATOR_EMM;
@ -220,7 +223,7 @@ void emm_handle_authentication_request(mme_ue_t *mme_ue)
ue = mme_ue->enb_ue;
d_assert(ue, return, "Null param");
enb = ue->enb;
d_assert(ue->enb, return, "Null param");
d_assert(enb, return, "Null param");
memset(&message, 0, sizeof(message));
message.emm.h.protocol_discriminator = NAS_PROTOCOL_DISCRIMINATOR_EMM;
@ -450,7 +453,8 @@ void emm_handle_detach_request(
status_t rv;
mme_enb_t *enb = NULL;
enb_ue_t *enb_ue = NULL;
pkbuf_t *emmbuf = NULL, *s1apbuf = NULL;
pkbuf_t *emmbuf = NULL, *s11buf = NULL, *s1apbuf = NULL;
mme_sess_t *sess;
nas_message_t message;
nas_detach_type_t *detach_type = &detach_request->detach_type;
@ -466,24 +470,57 @@ void emm_handle_detach_request(
enb = enb_ue->enb;
d_assert(enb, return, "Null param");
/* Encode ue->s1ap.cause for later use */
enb_ue->s1ap.cause.present = S1ap_Cause_PR_nas;
enb_ue->s1ap.cause.choice.nas = S1ap_CauseNas_detach;
switch (detach_type->detach_type)
{
/* 0 0 1 : EPS detach */
case NAS_DETACH_TYPE_FROM_UE_EPS_DETACH:
d_info("[NAS] (EPS) Detach request : UE_IMSI[%s] --> EMM",
ue->imsi_bcd);
break;
/* 0 1 0 : IMSI detach */
case NAS_DETACH_TYPE_FROM_UE_IMSI_DETACH:
d_info("[NAS] (IMSI) Detach request : UE_IMSI[%s] --> EMM",
ue->imsi_bcd);
break;
case 6: /* 1 1 0 : reserved */
case 7: /* 1 1 1 : reserved */
d_info("[NAS] (Unknown) Detach request : UE_IMSI[%s] --> EMM",
ue->imsi_bcd);
break;
/* 0 1 1 : combined EPS/IMSI detach */
case NAS_DETACH_TYPE_FROM_UE_COMBINED_EPS_IMSI_DETACH:
default: /* all other values */
d_info("[NAS] (EPS+IMSI) Detach request : UE_IMSI[%s] --> EMM",
ue->imsi_bcd);
break;
}
/* TODO: ESM session delete */
sess = mme_sess_first(ue);
while (sess != NULL)
{
mme_bearer_t *bearer = mme_default_bearer_in_sess(sess);
if (bearer != NULL)
{
rv = mme_s11_build_delete_session_request(&s11buf, sess);
d_assert(rv == CORE_OK, return, "S11 build error");
rv = mme_s11_send_to_sgw(bearer->sgw,
GTP_DELETE_SESSION_REQUEST_TYPE, sess->sgw_s11_teid,
s11buf);
if (rv != CORE_OK)
{
d_error("S11 send error rv %d", rv);
pkbuf_free(s11buf);
/* continue to send */
}
}
sess = mme_sess_next(sess);
}
if ((detach_type->switch_off & 0x1) == 0)
{
@ -509,7 +546,56 @@ void emm_handle_detach_request(
d_assert(s1ap_send_to_enb(enb, s1apbuf) == CORE_OK,, "s1ap send error");
}
/* initiate s1 ue context release */
/* TODO: initiate s1 ue context release with a timeout value */
}
void emm_handle_delete_session_response(mme_bearer_t *bearer)
{
status_t rv;
mme_ue_t *ue = NULL;
mme_enb_t *enb = NULL;
pkbuf_t *s1apbuf = NULL;
mme_sess_t *sess;
int b_wait = 0;
enb_ue_t *enb_ue = NULL;
d_assert(bearer, return, "Null param");
ue = bearer->ue;
d_assert(ue, return, "Null param");
enb_ue = ue->enb_ue;
d_assert(enb_ue, return, "Null param");
enb = enb_ue->enb;
d_assert(enb, return, "Null param");
sess = mme_sess_find_by_ebi(ue, bearer->ebi);
mme_sess_remove(sess);
/* sess and bearer are not valid from here */
sess = mme_sess_first(ue);
while (sess != NULL)
{
mme_bearer_t *temp_bearer = mme_default_bearer_in_sess(sess);
if (temp_bearer != NULL)
{
b_wait = 1;
break;
}
sess = mme_sess_next(sess);
}
if (!b_wait)
{
d_info("[NAS] Detach done : UE[%s] <-- EMM", ue->imsi_bcd);
rv = s1ap_build_ue_context_release_commmand(&s1apbuf, enb_ue, enb_ue->s1ap.cause);
d_assert(rv == CORE_OK && s1apbuf, return, "s1ap build error");
d_assert(s1ap_send_to_enb(enb, s1apbuf) == CORE_OK,, "s1ap send error");
/* TODO: launch a timer */
}
}
mme_ue_t *emm_find_ue_by_message(enb_ue_t *enb_ue, nas_message_t *message)

1
src/mme/emm_handler.h
View File

@ -22,6 +22,7 @@ CORE_DECLARE(void) emm_handle_identity_response(
mme_ue_t *ue, nas_identity_response_t *identity_response);
CORE_DECLARE(void) emm_handle_detach_request(
mme_ue_t *ue, nas_detach_request_from_ue_t *detach_request);
CORE_DECLARE(void) emm_handle_delete_session_response(mme_bearer_t *bearer);
CORE_DECLARE(mme_ue_t*) emm_find_ue_by_message(enb_ue_t *enb_ue, nas_message_t *message);
#ifdef __cplusplus

3
src/mme/emm_sm.c
View File

@ -56,6 +56,9 @@ void emm_state_operational(fsm_t *s, event_t *e)
case GTP_CREATE_SESSION_RESPONSE_TYPE:
emm_handle_create_session_response(bearer);
break;
case GTP_DELETE_SESSION_RESPONSE_TYPE:
emm_handle_delete_session_response(bearer);
break;
}
break;

3
src/mme/mme_context.c
View File

@ -355,6 +355,9 @@ status_t enb_ue_remove(enb_ue_t *ue)
index_free(&enb_ue_pool, ue);
if (ue->mme_ue)
ue->mme_ue->enb_ue = NULL;
return CORE_OK;
}

11
src/mme/mme_context.h
View File

@ -14,6 +14,9 @@
#include "mme_sm.h"
/* S1AP */
#include "S1ap-Cause.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
@ -114,15 +117,16 @@ struct _enb_ue_t {
tai_t tai;
e_cgi_t e_cgi;
/* S_TMSI */
//s_tmsi_t s_smti;
/* S1AP transactions */
struct {
S1ap_Cause_t cause;
} s1ap;
/* mme_ue_context */
mme_ue_t *mme_ue;
/* Connected enodeB */
mme_enb_t *enb;
};
struct _mme_ue_t {
@ -182,6 +186,7 @@ struct _mme_ue_t {
c_uint8_t ebi; /* EPS Bearer ID generator */
list_t sess_list;
/* Timer Info */
tm_block_id tm_t3; /**< T3 Timer */

30
src/mme/mme_s11_build.c
View File

@ -179,3 +179,33 @@ status_t mme_s11_build_modify_bearer_request(
return CORE_OK;
}
status_t mme_s11_build_delete_session_request(pkbuf_t **pkbuf, mme_sess_t *sess)
{
status_t rv;
mme_ue_t *ue = NULL;
gtp_message_t gtp_message;
gtp_delete_session_request_t *req = &gtp_message.delete_session_request;
gtp_f_teid_t mme_s11_teid;
d_assert(sess, return CORE_ERROR, "Null param");
ue = sess->ue;
d_assert(ue, return CORE_ERROR, "Null param");
memset(&gtp_message, 0, sizeof(gtp_message_t));
memset(&mme_s11_teid, 0, sizeof(gtp_f_teid_t));
mme_s11_teid.ipv4 = 1;
mme_s11_teid.interface_type = GTP_F_TEID_S11_MME_GTP_C;
mme_s11_teid.teid = htonl(sess->mme_s11_teid);
mme_s11_teid.ipv4_addr = sess->mme_s11_addr;
req->sender_f_teid_for_control_plane.presence = 1;
req->sender_f_teid_for_control_plane.data = &mme_s11_teid;
req->sender_f_teid_for_control_plane.len = GTP_F_TEID_IPV4_LEN;
rv = gtp_build_msg(pkbuf, GTP_DELETE_SESSION_REQUEST_TYPE, &gtp_message);
d_assert(rv == CORE_OK, return CORE_ERROR, "gtp build failed");
return CORE_OK;
}

2
src/mme/mme_s11_build.h
View File

@ -11,6 +11,8 @@ CORE_DECLARE(status_t) mme_s11_build_create_session_request(
pkbuf_t **pkbuf, mme_bearer_t *bearer);
CORE_DECLARE(status_t) mme_s11_build_modify_bearer_request(
pkbuf_t **pkbuf, mme_bearer_t *bearer);
CORE_DECLARE(status_t) mme_s11_build_delete_session_request(
pkbuf_t **pkbuf, mme_sess_t *sess);
#ifdef __cplusplus
}

27
src/mme/mme_s11_handler.c
View File

@ -97,3 +97,30 @@ void mme_s11_handle_modify_bearer_response(
event_set_param2(&e, (c_uintptr_t)GTP_MODIFY_BEARER_RESPONSE_TYPE);
mme_event_send(&e);
}
void mme_s11_handle_delete_session_response(
mme_sess_t *sess, gtp_delete_session_response_t *rsp)
{
event_t e;
mme_bearer_t *bearer;
d_assert(sess, return, "Null param");
d_assert(rsp, return, "Null param");
bearer = mme_default_bearer_in_sess(sess);
d_assert(bearer, return, "Null param");
if (rsp->cause.presence == 0)
{
d_error("No Cause");
return;
}
d_info("[GTP] Delete Session Response : "
"MME[%d] <-- SGW[%d]", sess->mme_s11_teid, sess->sgw_s11_teid);
event_set(&e, MME_EVT_EMM_BEARER_FROM_S11);
event_set_param1(&e, (c_uintptr_t)bearer->index);
event_set_param2(&e, (c_uintptr_t)GTP_DELETE_SESSION_RESPONSE_TYPE);
mme_event_send(&e);
}

2
src/mme/mme_s11_handler.h
View File

@ -13,6 +13,8 @@ CORE_DECLARE(void) mme_s11_handle_create_session_response(
mme_sess_t *sess, gtp_create_session_response_t *rsp);
CORE_DECLARE(void) mme_s11_handle_modify_bearer_response(
mme_sess_t *sess, gtp_modify_bearer_response_t *rsp);
CORE_DECLARE(void) mme_s11_handle_delete_session_response(
mme_sess_t *sess, gtp_delete_session_response_t *rsp);
#ifdef __cplusplus
}

4
src/mme/mme_sm.c
View File

@ -295,6 +295,10 @@ void mme_state_operational(fsm_t *s, event_t *e)
mme_s11_handle_modify_bearer_response(
sess, &gtp_message.modify_bearer_response);
break;
case GTP_DELETE_SESSION_RESPONSE_TYPE:
mme_s11_handle_delete_session_response(
sess, &gtp_message.delete_session_response);
break;
default:
d_warn("Not implmeneted(type:%d)", type);
break;

53
src/mme/s1ap_build.c
View File

@ -8,6 +8,7 @@
#include "s1ap_build.h"
#include "s1ap_conv.h"
status_t s1ap_build_setup_rsp(pkbuf_t **pkbuf)
{
int erval;
@ -260,3 +261,55 @@ status_t s1ap_build_initial_context_setup_request(
return CORE_OK;
}
status_t s1ap_build_ue_context_release_commmand(
pkbuf_t **s1apbuf, enb_ue_t *ue, S1ap_Cause_t cause)
{
char buf[INET_ADDRSTRLEN];
int encoded;
s1ap_message_t message;
S1ap_UEContextReleaseCommand_IEs_t *ies =
&message.s1ap_UEContextReleaseCommand_IEs;
d_assert(ue, return CORE_ERROR, "Null param");
memset(&message, 0, sizeof(s1ap_message_t));
if (ue->mme_ue_s1ap_id == 0)
{
d_error("invalid mme ue s1ap id (idx: %d)", ue->index);
return CORE_ERROR;
}
if (ue->enb_ue_s1ap_id)
{
ies->uE_S1AP_IDs.present = S1ap_UE_S1AP_IDs_PR_uE_S1AP_ID_pair;
ies->uE_S1AP_IDs.choice.uE_S1AP_ID_pair.mME_UE_S1AP_ID = ue->mme_ue_s1ap_id;
ies->uE_S1AP_IDs.choice.uE_S1AP_ID_pair.eNB_UE_S1AP_ID = ue->enb_ue_s1ap_id;
ies->uE_S1AP_IDs.choice.uE_S1AP_ID_pair.iE_Extensions = NULL;
}
else
{
ies->uE_S1AP_IDs.present = S1ap_UE_S1AP_IDs_PR_mME_UE_S1AP_ID;
ies->uE_S1AP_IDs.choice.mME_UE_S1AP_ID = ue->mme_ue_s1ap_id;
}
ies->cause = cause;
message.procedureCode = S1ap_ProcedureCode_id_UEContextRelease;
message.direction = S1AP_PDU_PR_initiatingMessage;
encoded = s1ap_encode_pdu(s1apbuf, &message);
s1ap_free_pdu(&message);
d_assert(s1apbuf && encoded >= 0,return CORE_ERROR,);
d_info("[S1AP] UE Context Release Command : "
"UE[mME-UE-S1AP-ID(%d)] <-- eNB[%s:%d]",
ue->mme_ue_s1ap_id,
INET_NTOP(&ue->enb->s1ap_sock->remote.sin_addr.s_addr, buf),
ue->enb->enb_id);
return CORE_OK;
}

2
src/mme/s1ap_build.h
View File

@ -15,6 +15,8 @@ CORE_DECLARE(status_t) s1ap_build_downlink_nas_transport(
pkbuf_t **s1apbuf, enb_ue_t *ue, pkbuf_t *emmbuf);
CORE_DECLARE(status_t) s1ap_build_initial_context_setup_request(
pkbuf_t **s1apbuf, mme_bearer_t *bearer, pkbuf_t *emmbuf);
CORE_DECLARE(status_t) s1ap_build_ue_context_release_commmand(
pkbuf_t **s1apbuf, enb_ue_t *ue, S1ap_Cause_t cause);
#ifdef __cplusplus
}

24
src/mme/s1ap_handler.c
View File

@ -300,3 +300,27 @@ void s1ap_handle_initial_context_setup_response(
}
}
void s1ap_handle_ue_context_release_complete(
mme_enb_t *enb, s1ap_message_t *message)
{
char buf[INET_ADDRSTRLEN];
enb_ue_t *ue = NULL;
S1ap_UEContextReleaseComplete_IEs_t *ies = NULL;
ies = &message->s1ap_UEContextReleaseComplete_IEs;
d_assert(ies, return, "Null param");
ue = enb_ue_find_by_mme_ue_s1ap_id(ies->mme_ue_s1ap_id);
d_assert(ue, return, "No UE Context[%d]", ies->mme_ue_s1ap_id);
d_info("[S1AP] UE Context Release Complete : "
"UE[mME-UE-S1AP-ID(%d)] --> eNB[%s:%d]",
ue->mme_ue_s1ap_id,
INET_NTOP(&enb->s1ap_sock->remote.sin_addr.s_addr, buf),
enb->enb_id);
/* BRANDON -> ACETCOM: "pass event to MME SM" or "process here?" */
/* process here */
enb_ue_remove(ue);
}

2
src/mme/s1ap_handler.h
View File

@ -18,6 +18,8 @@ CORE_DECLARE(void) s1ap_handle_ue_capability_info_indication(
mme_enb_t *enb, s1ap_message_t *message);
CORE_DECLARE(void) s1ap_handle_initial_context_setup_response(
mme_enb_t *enb, s1ap_message_t *message);
CORE_DECLARE(void) s1ap_handle_ue_context_release_complete(
mme_enb_t *enb, s1ap_message_t *message);
#ifdef __cplusplus
}

6
src/mme/s1ap_sm.c
View File

@ -100,6 +100,12 @@ void s1ap_state_operational(fsm_t *s, event_t *e)
enb, message);
break;
}
case S1ap_ProcedureCode_id_UEContextRelease :
{
s1ap_handle_ue_context_release_complete(
enb, message);
break;
}
default:
{
d_warn("Not implemented(choice:%d, proc:%d)",