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open5gs/src/mme/mme-sm.c

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/*
* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "mme-context.h"
#include "mme-sm.h"
#include "mme-timer.h"
#include "s1ap-handler.h"
#include "s1ap-path.h"
#include "sgsap-path.h"
#include "nas-security.h"
#include "nas-path.h"
#include "emm-handler.h"
#include "esm-handler.h"
#include "mme-gtp-path.h"
#include "mme-s11-handler.h"
#include "mme-fd-path.h"
#include "mme-s6a-handler.h"
#include "mme-path.h"
/* 3GPP TS 29.272 Annex A; Table !.a:
* Mapping from S6a error codes to NAS Cause Codes */
static uint8_t emm_cause_from_diameter(
mme_ue_t *mme_ue, const uint32_t *dia_err, const uint32_t *dia_exp_err)
{
ogs_assert(mme_ue);
if (dia_exp_err) {
switch (*dia_exp_err) {
case OGS_DIAM_S6A_ERROR_USER_UNKNOWN: /* 5001 */
ogs_info("[%s] User Unknown in HSS DB", mme_ue->imsi_bcd);
return EMM_CAUSE_PLMN_NOT_ALLOWED;
case OGS_DIAM_S6A_ERROR_UNKNOWN_EPS_SUBSCRIPTION: /* 5420 */
/* FIXME: Error diagnostic? */
return EMM_CAUSE_NO_SUITABLE_CELLS_IN_TRACKING_AREA;
case OGS_DIAM_S6A_ERROR_RAT_NOT_ALLOWED: /* 5421 */
return EMM_CAUSE_ROAMING_NOT_ALLOWED_IN_THIS_TRACKING_AREA;
case OGS_DIAM_S6A_ERROR_ROAMING_NOT_ALLOWED: /* 5004 */
return EMM_CAUSE_PLMN_NOT_ALLOWED;
//return EMM_CAUSE_EPS_SERVICES_NOT_ALLOWED_IN_THIS_PLMN; (ODB_HPLMN_APN)
//return EMM_CAUSE_ESM_FAILURE; (ODB_ALL_APN)
case OGS_DIAM_S6A_AUTHENTICATION_DATA_UNAVAILABLE: /* 4181 */
return EMM_CAUSE_NETWORK_FAILURE;
}
}
if (dia_err) {
switch (*dia_err) {
case ER_DIAMETER_AUTHORIZATION_REJECTED: /* 5003 */
case ER_DIAMETER_UNABLE_TO_DELIVER: /* 3002 */
case ER_DIAMETER_REALM_NOT_SERVED: /* 3003 */
return EMM_CAUSE_NO_SUITABLE_CELLS_IN_TRACKING_AREA;
case ER_DIAMETER_UNABLE_TO_COMPLY: /* 5012 */
case ER_DIAMETER_INVALID_AVP_VALUE: /* 5004 */
case ER_DIAMETER_AVP_UNSUPPORTED: /* 5001 */
case ER_DIAMETER_MISSING_AVP: /* 5005 */
case ER_DIAMETER_RESOURCES_EXCEEDED: /* 5006 */
case ER_DIAMETER_AVP_OCCURS_TOO_MANY_TIMES: /* 5009 */
return EMM_CAUSE_NETWORK_FAILURE;
}
}
ogs_error("Unexpected Diameter Result Code %d/%d, defaulting to severe "
"network failure",
dia_err ? *dia_err : -1, dia_exp_err ? *dia_exp_err : -1);
return EMM_CAUSE_SEVERE_NETWORK_FAILURE;
}
void mme_state_initial(ogs_fsm_t *s, mme_event_t *e)
{
mme_sm_debug(e);
ogs_assert(s);
OGS_FSM_TRAN(s, &mme_state_operational);
}
void mme_state_final(ogs_fsm_t *s, mme_event_t *e)
{
mme_sm_debug(e);
ogs_assert(s);
}
void mme_state_operational(ogs_fsm_t *s, mme_event_t *e)
{
int rv;
char buf[OGS_ADDRSTRLEN];
ogs_sock_t *sock = NULL;
ogs_sockaddr_t *addr = NULL;
mme_enb_t *enb = NULL;
uint16_t max_num_of_ostreams = 0;
ogs_s1ap_message_t s1ap_message;
ogs_pkbuf_t *pkbuf = NULL;
int rc;
ogs_nas_eps_message_t nas_message;
enb_ue_t *enb_ue = NULL;
mme_ue_t *mme_ue = NULL;
mme_bearer_t *bearer = NULL;
mme_bearer_t *default_bearer = NULL;
mme_sess_t *sess = NULL;
ogs_diam_s6a_message_t *s6a_message = NULL;
ogs_gtp_node_t *gnode = NULL;
ogs_gtp_xact_t *xact = NULL;
ogs_gtp2_message_t gtp_message;
mme_vlr_t *vlr = NULL;
ogs_assert(e);
mme_sm_debug(e);
ogs_assert(s);
switch (e->id) {
case OGS_FSM_ENTRY_SIG:
break;
case OGS_FSM_EXIT_SIG:
break;
case MME_EVT_S1AP_LO_ACCEPT:
sock = e->sock;
ogs_assert(sock);
addr = e->addr;
ogs_assert(addr);
ogs_assert(addr->ogs_sa_family == AF_INET ||
addr->ogs_sa_family == AF_INET6);
ogs_info("eNB-S1 accepted[%s] in master_sm module",
OGS_ADDR(addr, buf));
enb = mme_enb_find_by_addr(addr);
if (!enb) {
enb = mme_enb_add(sock, addr);
ogs_assert(enb);
} else {
ogs_warn("eNB context duplicated with IP-address [%s]!!!",
OGS_ADDR(addr, buf));
ogs_sock_destroy(sock);
ogs_free(addr);
ogs_warn("S1 Socket Closed");
}
break;
case MME_EVT_S1AP_LO_SCTP_COMM_UP:
sock = e->sock;
ogs_assert(sock);
addr = e->addr;
ogs_assert(addr);
ogs_assert(addr->ogs_sa_family == AF_INET ||
addr->ogs_sa_family == AF_INET6);
max_num_of_ostreams = e->max_num_of_ostreams;
enb = mme_enb_find_by_addr(addr);
if (!enb) {
enb = mme_enb_add(sock, addr);
ogs_assert(enb);
} else {
ogs_free(addr);
}
if (enb->max_num_of_ostreams)
enb->max_num_of_ostreams =
ogs_min(max_num_of_ostreams, enb->max_num_of_ostreams);
else
enb->max_num_of_ostreams = max_num_of_ostreams;
ogs_info("eNB-N2[%s] max_num_of_ostreams : %d",
OGS_ADDR(enb->sctp.addr, buf), enb->max_num_of_ostreams);
break;
case MME_EVT_S1AP_LO_CONNREFUSED:
sock = e->sock;
ogs_assert(sock);
addr = e->addr;
ogs_assert(addr);
ogs_assert(addr->ogs_sa_family == AF_INET ||
addr->ogs_sa_family == AF_INET6);
enb = mme_enb_find_by_addr(addr);
if (enb) {
ogs_info("eNB-S1[%s] connection refused!!!", OGS_ADDR(addr, buf));
mme_gtp_send_release_all_ue_in_enb(
enb, OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_LO_CONNREFUSED);
mme_enb_remove(enb);
} else {
ogs_warn("eNB-S1[%s] connection refused, Already Removed!",
OGS_ADDR(addr, buf));
}
ogs_free(addr);
break;
case MME_EVT_S1AP_MESSAGE:
sock = e->sock;
ogs_assert(sock);
addr = e->addr;
ogs_assert(addr);
pkbuf = e->pkbuf;
ogs_assert(pkbuf);
ogs_assert(addr->ogs_sa_family == AF_INET ||
addr->ogs_sa_family == AF_INET6);
enb = mme_enb_find_by_addr(addr);
ogs_free(addr);
ogs_assert(enb);
ogs_assert(OGS_FSM_STATE(&enb->sm));
rc = ogs_s1ap_decode(&s1ap_message, pkbuf);
if (rc == OGS_OK) {
e->enb = enb;
e->s1ap_message = &s1ap_message;
ogs_fsm_dispatch(&enb->sm, e);
} else {
ogs_warn("Cannot decode S1AP message");
ogs_assert(OGS_OK ==
s1ap_send_error_indication(
enb, NULL, NULL, S1AP_Cause_PR_protocol,
S1AP_CauseProtocol_abstract_syntax_error_falsely_constructed_message));
}
ogs_s1ap_free(&s1ap_message);
ogs_pkbuf_free(pkbuf);
break;
case MME_EVT_S1AP_TIMER:
enb_ue = e->enb_ue;
ogs_assert(enb_ue);
switch (e->timer_id) {
case MME_TIMER_S1_DELAYED_SEND:
enb = e->enb;
ogs_assert(enb);
pkbuf = e->pkbuf;
ogs_assert(pkbuf);
ogs_expect(OGS_OK == s1ap_send_to_enb_ue(enb_ue, pkbuf));
ogs_timer_delete(e->timer);
break;
case MME_TIMER_S1_HOLDING:
ogs_warn("Implicit S1 release");
ogs_warn(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
enb_ue->enb_ue_s1ap_id, enb_ue->mme_ue_s1ap_id);
s1ap_handle_ue_context_release_action(enb_ue);
break;
default:
ogs_error("Unknown timer[%s:%d]",
mme_timer_get_name(e->timer_id), e->timer_id);
break;
}
break;
case MME_EVT_EMM_MESSAGE:
enb_ue = e->enb_ue;
ogs_assert(enb_ue);
pkbuf = e->pkbuf;
ogs_assert(pkbuf);
if (ogs_nas_emm_decode(&nas_message, pkbuf) != OGS_OK) {
ogs_error("ogs_nas_emm_decode() failed");
ogs_pkbuf_free(pkbuf);
return;
}
mme_ue = enb_ue->mme_ue;
if (!mme_ue) {
mme_ue = mme_ue_find_by_message(&nas_message);
if (!mme_ue) {
mme_ue = mme_ue_add(enb_ue);
ogs_assert(mme_ue);
} else {
/* Here, if the MME_UE Context is found,
* the integrity check is not performed
* For example, ATTACH_REQUEST,
* TRACKING_AREA_UPDATE_REQUEST message
*
* Now, We will check the MAC in the NAS message*/
ogs_nas_security_header_type_t h;
h.type = e->nas_type;
if (h.integrity_protected) {
/* Decryption was performed in S1AP handler.
* So, we disabled 'ciphered'
* not to decrypt NAS message */
h.ciphered = 0;
if (nas_eps_security_decode(mme_ue, h, pkbuf) != OGS_OK) {
ogs_error("nas_security_decode() failed");
ogs_pkbuf_free(pkbuf);
return;
}
}
}
/* If NAS(mme_ue_t) has already been associated with
* older S1(enb_ue_t) context */
if (ECM_CONNECTED(mme_ue)) {
/* Previous S1(enb_ue_t) context the holding timer(30secs)
* is started.
* Newly associated S1(enb_ue_t) context holding timer
* is stopped. */
ogs_debug("Start S1 Holding Timer");
ogs_debug(" ENB_UE_S1AP_ID[%d] MME_UE_S1AP_ID[%d]",
mme_ue->enb_ue->enb_ue_s1ap_id,
mme_ue->enb_ue->mme_ue_s1ap_id);
/* De-associate S1 with NAS/EMM */
enb_ue_deassociate(mme_ue->enb_ue);
ogs_assert(OGS_OK ==
s1ap_send_ue_context_release_command(mme_ue->enb_ue,
S1AP_Cause_PR_nas, S1AP_CauseNas_normal_release,
S1AP_UE_CTX_REL_S1_CONTEXT_REMOVE, 0));
}
mme_ue_associate_enb_ue(mme_ue, enb_ue);
}
ogs_assert(mme_ue);
ogs_assert(OGS_FSM_STATE(&mme_ue->sm));
e->mme_ue = mme_ue;
e->nas_message = &nas_message;
ogs_fsm_dispatch(&mme_ue->sm, e);
if (OGS_FSM_CHECK(&mme_ue->sm, emm_state_exception)) {
mme_send_delete_session_or_mme_ue_context_release(mme_ue);
}
ogs_pkbuf_free(pkbuf);
break;
case MME_EVT_EMM_TIMER:
mme_ue = e->mme_ue;
ogs_assert(mme_ue);
ogs_assert(OGS_FSM_STATE(&mme_ue->sm));
ogs_fsm_dispatch(&mme_ue->sm, e);
break;
case MME_EVT_ESM_MESSAGE:
mme_ue = e->mme_ue;
ogs_assert(mme_ue);
pkbuf = e->pkbuf;
ogs_assert(pkbuf);
if (ogs_nas_esm_decode(&nas_message, pkbuf) != OGS_OK) {
ogs_error("ogs_nas_esm_decode() failed");
ogs_pkbuf_free(pkbuf);
break;
}
bearer = mme_bearer_find_or_add_by_message(
mme_ue, &nas_message, e->create_action);
if (!bearer) {
ogs_pkbuf_free(pkbuf);
break;
}
sess = bearer->sess;
ogs_assert(sess);
default_bearer = mme_default_bearer_in_sess(sess);
ogs_assert(default_bearer);
e->bearer = bearer;
e->nas_message = &nas_message;
ogs_fsm_dispatch(&bearer->sm, e);
if (OGS_FSM_CHECK(&bearer->sm, esm_state_bearer_deactivated)) {
if (default_bearer->ebi == bearer->ebi) {
/* if the bearer is a default bearer,
* remove all session context linked the default bearer */
mme_sess_remove(sess);
} else {
/* if the bearer is not a default bearer,
* just remove the bearer context */
mme_bearer_remove(bearer);
}
} else if (OGS_FSM_CHECK(&bearer->sm, esm_state_pdn_did_disconnect)) {
ogs_assert(default_bearer->ebi == bearer->ebi);
mme_sess_remove(sess);
} else if (OGS_FSM_CHECK(&bearer->sm, esm_state_exception)) {
/*
* The UE requested the wrong APN.
*
* From the Issues #568, MME need to accept further service request.
* To do this, we are not going to release UE context.
*
* Just we'll remove MME session context.
*/
mme_sess_remove(sess);
}
ogs_pkbuf_free(pkbuf);
break;
case MME_EVT_ESM_TIMER:
bearer = e->bearer;
ogs_assert(bearer);
ogs_assert(OGS_FSM_STATE(&bearer->sm));
ogs_fsm_dispatch(&bearer->sm, e);
break;
case MME_EVT_S6A_MESSAGE:
mme_ue = e->mme_ue;
ogs_assert(mme_ue);
s6a_message = e->s6a_message;
ogs_assert(s6a_message);
enb_ue = enb_ue_cycle(mme_ue->enb_ue);
if (!enb_ue) {
ogs_error("S1 context has already been removed");
ogs_subscription_data_free(
&s6a_message->ula_message.subscription_data);
ogs_free(s6a_message);
break;
}
if (s6a_message->result_code != ER_DIAMETER_SUCCESS) {
/* Unfortunately fd doesn't distinguish
* between result-code and experimental-result-code.
*
* However, e.g. 5004 has different meaning
* if used in result-code than in experimental-result-code */
uint8_t emm_cause = emm_cause_from_diameter(
mme_ue, s6a_message->err, s6a_message->exp_err);
ogs_info("[%s] Attach reject [EMM_CAUSE:%d]",
mme_ue->imsi_bcd, emm_cause);
ogs_assert(OGS_OK ==
nas_eps_send_attach_reject(mme_ue,
emm_cause, ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
ogs_assert(OGS_OK ==
s1ap_send_ue_context_release_command(enb_ue,
S1AP_Cause_PR_nas, S1AP_CauseNas_normal_release,
S1AP_UE_CTX_REL_UE_CONTEXT_REMOVE, 0));
ogs_subscription_data_free(
&s6a_message->ula_message.subscription_data);
ogs_free(s6a_message);
break;
}
switch (s6a_message->cmd_code) {
case OGS_DIAM_S6A_CMD_CODE_AUTHENTICATION_INFORMATION:
mme_s6a_handle_aia(mme_ue, &s6a_message->aia_message);
break;
case OGS_DIAM_S6A_CMD_CODE_UPDATE_LOCATION:
mme_s6a_handle_ula(mme_ue, &s6a_message->ula_message);
if (mme_ue->nas_eps.type == MME_EPS_TYPE_ATTACH_REQUEST) {
rv = nas_eps_send_emm_to_esm(mme_ue,
&mme_ue->pdn_connectivity_request);
if (rv != OGS_OK) {
ogs_error("nas_eps_send_emm_to_esm() failed");
ogs_assert(OGS_OK ==
nas_eps_send_attach_reject(mme_ue,
EMM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED,
ESM_CAUSE_PROTOCOL_ERROR_UNSPECIFIED));
}
} else if (mme_ue->nas_eps.type == MME_EPS_TYPE_TAU_REQUEST) {
ogs_assert(OGS_OK ==
nas_eps_send_tau_accept(mme_ue,
S1AP_ProcedureCode_id_InitialContextSetup));
} else if (mme_ue->nas_eps.type == MME_EPS_TYPE_SERVICE_REQUEST) {
ogs_error("[%s] Service request", mme_ue->imsi_bcd);
} else if (mme_ue->nas_eps.type ==
MME_EPS_TYPE_DETACH_REQUEST_FROM_UE) {
ogs_error("[%s] Detach request", mme_ue->imsi_bcd);
} else {
ogs_fatal("Invalid Type[%d]", mme_ue->nas_eps.type);
ogs_assert_if_reached();
}
break;
default:
ogs_error("Invalid Type[%d]", s6a_message->cmd_code);
break;
}
ogs_subscription_data_free(&s6a_message->ula_message.subscription_data);
ogs_free(s6a_message);
break;
case MME_EVT_S11_MESSAGE:
pkbuf = e->pkbuf;
ogs_assert(pkbuf);
if (ogs_gtp2_parse_msg(&gtp_message, pkbuf) != OGS_OK) {
ogs_error("ogs_gtp2_parse_msg() failed");
ogs_pkbuf_free(pkbuf);
break;
}
/*
* 5.5.2 in spec 29.274
*
* If a peer's TEID is not available, the TEID field still shall be
* present in the header and its value shall be set to "0" in the
* following messages:
*
* - Create Session Request message on S2a/S2b/S5/S8
*
* - Create Session Request message on S4/S11, if for a given UE,
* the SGSN/MME has not yet obtained the Control TEID of the SGW.
*
* - If a node receives a message and the TEID-C in the GTPv2 header of
* the received message is not known, it shall respond with
* "Context not found" Cause in the corresponding response message
* to the sender, the TEID used in the GTPv2-C header in the response
* message shall be then set to zero.
*
* - If a node receives a request message containing protocol error,
* e.g. Mandatory IE missing, which requires the receiver to reject
* the message as specified in clause 7.7, it shall reject
* the request message. For the response message, the node should
* look up the remote peer's TEID and accordingly set the GTPv2-C
* header TEID and the message cause code. As an implementation
* option, the node may not look up the remote peer's TEID and
* set the GTPv2-C header TEID to zero in the response message.
* However in this case, the cause code shall not be set to
* "Context not found".
*/
if (gtp_message.h.teid_presence && gtp_message.h.teid != 0) {
/* Cause is not "Context not found" */
mme_ue = mme_ue_find_by_teid(gtp_message.h.teid);
}
if (mme_ue) {
gnode = mme_ue->gnode;
ogs_assert(gnode);
} else {
gnode = e->gnode;
ogs_assert(gnode);
}
rv = ogs_gtp_xact_receive(gnode, &gtp_message.h, &xact);
if (rv != OGS_OK) {
ogs_pkbuf_free(pkbuf);
break;
}
switch (gtp_message.h.type) {
case OGS_GTP2_ECHO_REQUEST_TYPE:
mme_s11_handle_echo_request(xact, &gtp_message.echo_request);
break;
case OGS_GTP2_ECHO_RESPONSE_TYPE:
mme_s11_handle_echo_response(xact, &gtp_message.echo_response);
break;
case OGS_GTP2_CREATE_SESSION_RESPONSE_TYPE:
mme_s11_handle_create_session_response(
xact, mme_ue, &gtp_message.create_session_response);
break;
case OGS_GTP2_MODIFY_BEARER_RESPONSE_TYPE:
mme_s11_handle_modify_bearer_response(
xact, mme_ue, &gtp_message.modify_bearer_response);
break;
case OGS_GTP2_DELETE_SESSION_RESPONSE_TYPE:
mme_s11_handle_delete_session_response(
xact, mme_ue, &gtp_message.delete_session_response);
break;
case OGS_GTP2_CREATE_BEARER_REQUEST_TYPE:
mme_s11_handle_create_bearer_request(
xact, mme_ue, &gtp_message.create_bearer_request);
break;
case OGS_GTP2_UPDATE_BEARER_REQUEST_TYPE:
mme_s11_handle_update_bearer_request(
xact, mme_ue, &gtp_message.update_bearer_request);
break;
case OGS_GTP2_DELETE_BEARER_REQUEST_TYPE:
mme_s11_handle_delete_bearer_request(
xact, mme_ue, &gtp_message.delete_bearer_request);
break;
case OGS_GTP2_RELEASE_ACCESS_BEARERS_RESPONSE_TYPE:
mme_s11_handle_release_access_bearers_response(
xact, mme_ue, &gtp_message.release_access_bearers_response);
break;
case OGS_GTP2_DOWNLINK_DATA_NOTIFICATION_TYPE:
if (!mme_ue) {
if (gtp_message.h.teid_presence)
ogs_warn("No Context : TEID[%d]", gtp_message.h.teid);
else
ogs_warn("No Context : No TEID");
break;
}
mme_s11_handle_downlink_data_notification(
xact, mme_ue, &gtp_message.downlink_data_notification);
break;
case OGS_GTP2_CREATE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE:
mme_s11_handle_create_indirect_data_forwarding_tunnel_response(
xact, mme_ue,
&gtp_message.create_indirect_data_forwarding_tunnel_response);
break;
case OGS_GTP2_DELETE_INDIRECT_DATA_FORWARDING_TUNNEL_RESPONSE_TYPE:
mme_s11_handle_delete_indirect_data_forwarding_tunnel_response(
xact, mme_ue,
&gtp_message.delete_indirect_data_forwarding_tunnel_response);
break;
case OGS_GTP2_BEARER_RESOURCE_FAILURE_INDICATION_TYPE:
mme_s11_handle_bearer_resource_failure_indication(
xact, mme_ue,
&gtp_message.bearer_resource_failure_indication);
break;
default:
ogs_warn("Not implmeneted(type:%d)", gtp_message.h.type);
break;
}
ogs_pkbuf_free(pkbuf);
break;
case MME_EVT_SGSAP_LO_SCTP_COMM_UP:
sock = e->sock;
ogs_assert(sock);
addr = e->addr;
ogs_assert(addr);
ogs_assert(addr->ogs_sa_family == AF_INET ||
addr->ogs_sa_family == AF_INET6);
max_num_of_ostreams = e->max_num_of_ostreams;
vlr = mme_vlr_find_by_addr(addr);
ogs_free(addr);
ogs_assert(vlr);
ogs_assert(OGS_FSM_STATE(&vlr->sm));
vlr->max_num_of_ostreams =
ogs_min(max_num_of_ostreams, vlr->max_num_of_ostreams);
ogs_debug("VLR-SGs SCTP_COMM_UP[%s] Max Num of Outbound Streams[%d]",
OGS_ADDR(vlr->addr, buf), vlr->max_num_of_ostreams);
e->vlr = vlr;
ogs_fsm_dispatch(&vlr->sm, e);
break;
case MME_EVT_SGSAP_LO_CONNREFUSED:
sock = e->sock;
ogs_assert(sock);
addr = e->addr;
ogs_assert(addr);
ogs_assert(addr->ogs_sa_family == AF_INET ||
addr->ogs_sa_family == AF_INET6);
vlr = mme_vlr_find_by_addr(addr);
ogs_free(addr);
ogs_assert(vlr);
ogs_assert(OGS_FSM_STATE(&vlr->sm));
if (OGS_FSM_CHECK(&vlr->sm, sgsap_state_connected)) {
e->vlr = vlr;
ogs_fsm_dispatch(&vlr->sm, e);
ogs_info("VLR-SGs[%s] connection refused!!!",
OGS_ADDR(vlr->addr, buf));
} else {
ogs_warn("VLR-SGs[%s] connection refused, Already Removed!",
OGS_ADDR(vlr->addr, buf));
}
break;
case MME_EVT_SGSAP_MESSAGE:
sock = e->sock;
ogs_assert(sock);
addr = e->addr;
ogs_assert(addr);
pkbuf = e->pkbuf;
ogs_assert(pkbuf);
ogs_assert(addr->ogs_sa_family == AF_INET ||
addr->ogs_sa_family == AF_INET6);
vlr = mme_vlr_find_by_addr(addr);
ogs_free(addr);
ogs_assert(vlr);
ogs_assert(OGS_FSM_STATE(&vlr->sm));
e->vlr = vlr;
ogs_fsm_dispatch(&vlr->sm, e);
ogs_pkbuf_free(pkbuf);
break;
case MME_EVT_SGSAP_TIMER:
vlr = e->vlr;
ogs_assert(vlr);
ogs_assert(OGS_FSM_STATE(&vlr->sm));
ogs_fsm_dispatch(&vlr->sm, e);
break;
default:
ogs_error("No handler for event %s", mme_event_get_name(e));
break;
}
}
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