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/*
* Copyright (C) 2019-2024 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 "sbi-path.h"
#include "nnrf-handler.h"
void pcf_state_initial(ogs_fsm_t *s, pcf_event_t *e)
{
pcf_sm_debug(e);
ogs_assert(s);
OGS_FSM_TRAN(s, &pcf_state_operational);
}
void pcf_state_final(ogs_fsm_t *s, pcf_event_t *e)
{
pcf_sm_debug(e);
}
void pcf_state_operational(ogs_fsm_t *s, pcf_event_t *e)
{
int rv;
ogs_sbi_stream_t *stream = NULL;
ogs_pool_id_t stream_id = OGS_INVALID_POOL_ID;
ogs_sbi_request_t *request = NULL;
ogs_sbi_nf_instance_t *nf_instance = NULL;
ogs_sbi_subscription_data_t *subscription_data = NULL;
ogs_sbi_response_t *response = NULL;
ogs_sbi_message_t message;
ogs_sbi_object_t *sbi_object = NULL;
ogs_sbi_xact_t *sbi_xact = NULL;
ogs_pool_id_t sbi_xact_id = OGS_INVALID_POOL_ID;
ogs_sbi_service_type_e service_type = OGS_SBI_SERVICE_TYPE_NULL;
pcf_ue_t *pcf_ue = NULL;
ogs_pool_id_t pcf_ue_id = OGS_INVALID_POOL_ID;
pcf_sess_t *sess = NULL;
ogs_pool_id_t sess_id = OGS_INVALID_POOL_ID;
pcf_app_t *app_session = NULL;
pcf_sm_debug(e);
ogs_assert(s);
switch (e->h.id) {
case OGS_FSM_ENTRY_SIG:
break;
case OGS_FSM_EXIT_SIG:
break;
case OGS_EVENT_SBI_SERVER:
request = e->h.sbi.request;
ogs_assert(request);
stream_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(stream_id >= OGS_MIN_POOL_ID &&
stream_id <= OGS_MAX_POOL_ID);
stream = ogs_sbi_stream_find_by_id(stream_id);
if (!stream) {
ogs_error("STREAM has already been removed [%d]", stream_id);
break;
}
rv = ogs_sbi_parse_request(&message, request);
if (rv != OGS_OK) {
/* 'message' buffer is released in ogs_sbi_parse_request() */
ogs_error("cannot parse HTTP message");
ogs_assert(true ==
ogs_sbi_server_send_error(
stream, OGS_SBI_HTTP_STATUS_BAD_REQUEST,
NULL, "cannot parse HTTP message", NULL, NULL));
break;
}
if (strcmp(message.h.api.version, OGS_SBI_API_V1) != 0) {
ogs_error("Not supported version [%s]", message.h.api.version);
ogs_assert(true ==
ogs_sbi_server_send_error(
stream, OGS_SBI_HTTP_STATUS_BAD_REQUEST,
&message, "Not supported version", NULL, NULL));
ogs_sbi_message_free(&message);
break;
}
SWITCH(message.h.service.name)
CASE(OGS_SBI_SERVICE_NAME_NNRF_NFM)
SWITCH(message.h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_NF_STATUS_NOTIFY)
SWITCH(message.h.method)
CASE(OGS_SBI_HTTP_METHOD_POST)
ogs_nnrf_nfm_handle_nf_status_notify(stream, &message);
break;
DEFAULT
ogs_error("Invalid HTTP method [%s]", message.h.method);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_FORBIDDEN, &message,
"Invalid HTTP method", message.h.method, NULL));
END
break;
DEFAULT
ogs_error("Invalid resource name [%s]",
message.h.resource.component[0]);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_BAD_REQUEST, &message,
"Unknown resource name",
message.h.resource.component[0], NULL));
END
break;
CASE(OGS_SBI_SERVICE_NAME_NPCF_AM_POLICY_CONTROL)
SWITCH(message.h.method)
CASE(OGS_SBI_HTTP_METHOD_POST)
if (message.PolicyAssociationRequest &&
message.PolicyAssociationRequest->supi) {
pcf_ue = pcf_ue_find_by_supi(
message.PolicyAssociationRequest->supi);
if (!pcf_ue) {
pcf_ue = pcf_ue_add(
message.PolicyAssociationRequest->supi);
ogs_assert(pcf_ue);
}
}
break;
CASE(OGS_SBI_HTTP_METHOD_DELETE)
if (message.h.resource.component[1]) {
pcf_ue = pcf_ue_find_by_association_id(
message.h.resource.component[1]);
} else {
ogs_error("No Policy Association Id");
}
break;
DEFAULT
END
if (!pcf_ue) {
ogs_error("Not found [%s]", message.h.method);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_NOT_FOUND,
&message, "Not found", message.h.method, NULL));
break;
}
ogs_assert(OGS_FSM_STATE(&pcf_ue->sm));
e->pcf_ue_id = pcf_ue->id;
e->h.sbi.message = &message;
ogs_fsm_dispatch(&pcf_ue->sm, e);
if (OGS_FSM_CHECK(&pcf_ue->sm, pcf_am_state_exception)) {
ogs_error("[%s] State machine exception", pcf_ue->supi);
pcf_ue_remove(pcf_ue);
} else if (OGS_FSM_CHECK(&pcf_ue->sm, pcf_am_state_deleted)) {
ogs_debug("[%s] PCF-AM removed", pcf_ue->supi);
pcf_ue_remove(pcf_ue);
}
break;
CASE(OGS_SBI_SERVICE_NAME_NPCF_SMPOLICYCONTROL)
SWITCH(message.h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_SM_POLICIES)
if (!message.h.resource.component[1]) {
if (message.SmPolicyContextData &&
message.SmPolicyContextData->supi &&
message.SmPolicyContextData->pdu_session_id) {
pcf_ue = pcf_ue_find_by_supi(
message.SmPolicyContextData->supi);
if (!pcf_ue) {
if (!strcmp(message.h.method,
OGS_SBI_HTTP_METHOD_POST)) {
pcf_ue = pcf_ue_add(
message.SmPolicyContextData->supi);
if (!pcf_ue) {
ogs_error("[%s:%d] Invalid Request [%s]",
message.SmPolicyContextData->supi,
message.SmPolicyContextData->
pdu_session_id,
message.h.method);
} else
ogs_debug("[%s:%d] PCF UE added",
message.SmPolicyContextData->supi,
message.SmPolicyContextData->
pdu_session_id);
} else {
ogs_error("[%s:%d] Invalid HTTP method [%s]",
message.SmPolicyContextData->supi,
message.SmPolicyContextData->
pdu_session_id,
message.h.method);
}
}
if (pcf_ue) {
sess = pcf_sess_find_by_psi(pcf_ue, message.
SmPolicyContextData->pdu_session_id);
if (!sess) {
if (!strcmp(message.h.method,
OGS_SBI_HTTP_METHOD_POST)) {
sess = pcf_sess_add(pcf_ue, message.
SmPolicyContextData->pdu_session_id);
if (!sess) {
ogs_error("[%s:%d] "
"Invalid Request [%s]",
message.SmPolicyContextData->
supi,
message.SmPolicyContextData->
pdu_session_id,
message.h.method);
} else
ogs_debug("[%s:%d] PCF session added",
pcf_ue->supi, sess->psi);
} else {
ogs_error("[%s:%d] "
"Invalid HTTP method [%s]",
message.SmPolicyContextData->supi,
message.SmPolicyContextData->
pdu_session_id,
message.h.method);
}
}
}
}
} else {
sess = pcf_sess_find_by_sm_policy_id(
message.h.resource.component[1]);
}
break;
DEFAULT
END
if (!sess) {
ogs_error("Not found [%s]", message.h.uri);
/*
* TS29.512
* 4.2.2.2 SM Policy Association establishment
*
* If the user information received within the "supi" attribute is
* unknown, the PCF shall reject the request with an HTTP "400 Bad
* Request" response message including the "cause" attribute
* of the ProblemDetails data structure set to "USER_UNKNOWN".
*/
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_BAD_REQUEST,
&message, "Not found", message.h.uri, "USER_UNKNOWN"));
break;
}
ogs_assert(OGS_FSM_STATE(&sess->sm));
e->sess_id = sess->id;
e->h.sbi.message = &message;
ogs_fsm_dispatch(&sess->sm, e);
if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
ogs_error("[%s:%d] State machine exception",
pcf_ue->supi, sess->psi);
pcf_sess_remove(sess);
}
break;
CASE(OGS_SBI_SERVICE_NAME_NPCF_POLICYAUTHORIZATION)
SWITCH(message.h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_APP_SESSIONS)
if (!message.h.resource.component[1]) {
if (message.AppSessionContext &&
message.AppSessionContext->asc_req_data &&
(message.AppSessionContext->asc_req_data->ue_ipv4 ||
message.AppSessionContext->asc_req_data->ue_ipv6)) {
if (!sess &&
message.AppSessionContext->asc_req_data->ue_ipv4)
sess = pcf_sess_find_by_ipv4addr(message.
AppSessionContext->asc_req_data->ue_ipv4);
if (!sess &&
message.AppSessionContext->asc_req_data->ue_ipv6)
sess = pcf_sess_find_by_ipv6addr(message.
AppSessionContext->asc_req_data->ue_ipv6);
}
} else {
app_session = pcf_app_find_by_app_session_id(
message.h.resource.component[1]);
if (app_session)
sess = app_session->sess;
}
break;
DEFAULT
END
if (!sess) {
ogs_error("Not found [%s]", message.h.uri);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_NOT_FOUND,
&message, "Not found", message.h.uri, NULL));
break;
}
ogs_assert(OGS_FSM_STATE(&sess->sm));
e->sess_id = sess->id;
e->app = app_session;
e->h.sbi.message = &message;
ogs_fsm_dispatch(&sess->sm, e);
if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
ogs_error("[%s:%d] State machine exception",
pcf_ue->supi, sess->psi);
pcf_sess_remove(sess);
}
break;
DEFAULT
ogs_error("Invalid API name [%s]", message.h.service.name);
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_BAD_REQUEST, &message,
"Invalid API name", message.h.service.name, NULL));
END
/* In lib/sbi/server.c, notify_completed() releases 'request' buffer. */
ogs_sbi_message_free(&message);
break;
case OGS_EVENT_SBI_CLIENT:
ogs_assert(e);
response = e->h.sbi.response;
ogs_assert(response);
rv = ogs_sbi_parse_response(&message, response);
if (rv != OGS_OK) {
ogs_error("cannot parse HTTP response");
ogs_sbi_message_free(&message);
ogs_sbi_response_free(response);
break;
}
if (strcmp(message.h.api.version, OGS_SBI_API_V1) != 0) {
ogs_error("Not supported version [%s]", message.h.api.version);
ogs_sbi_message_free(&message);
ogs_sbi_response_free(response);
break;
}
SWITCH(message.h.service.name)
CASE(OGS_SBI_SERVICE_NAME_NNRF_NFM)
SWITCH(message.h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_NF_INSTANCES)
nf_instance = e->h.sbi.data;
ogs_assert(nf_instance);
ogs_assert(OGS_FSM_STATE(&nf_instance->sm));
e->h.sbi.message = &message;
ogs_fsm_dispatch(&nf_instance->sm, e);
break;
CASE(OGS_SBI_RESOURCE_NAME_SUBSCRIPTIONS)
subscription_data = e->h.sbi.data;
ogs_assert(subscription_data);
SWITCH(message.h.method)
CASE(OGS_SBI_HTTP_METHOD_POST)
if (message.res_status == OGS_SBI_HTTP_STATUS_CREATED ||
message.res_status == OGS_SBI_HTTP_STATUS_OK) {
ogs_nnrf_nfm_handle_nf_status_subscribe(
subscription_data, &message);
} else {
ogs_error("HTTP response error : %d",
message.res_status);
}
break;
CASE(OGS_SBI_HTTP_METHOD_PATCH)
if (message.res_status == OGS_SBI_HTTP_STATUS_OK ||
message.res_status == OGS_SBI_HTTP_STATUS_NO_CONTENT) {
ogs_nnrf_nfm_handle_nf_status_update(
subscription_data, &message);
} else {
ogs_error("[%s] HTTP response error [%d]",
subscription_data->id ?
subscription_data->id : "Unknown",
message.res_status);
}
break;
CASE(OGS_SBI_HTTP_METHOD_DELETE)
if (message.res_status ==
OGS_SBI_HTTP_STATUS_NO_CONTENT) {
ogs_sbi_subscription_data_remove(subscription_data);
} else {
ogs_error("[%s] HTTP response error [%d]",
subscription_data->id ?
subscription_data->id : "Unknown",
message.res_status);
}
break;
DEFAULT
ogs_error("[%s] Invalid HTTP method [%s]",
subscription_data->id, message.h.method);
ogs_assert_if_reached();
END
break;
DEFAULT
ogs_error("Invalid resource name [%s]",
message.h.resource.component[0]);
ogs_assert_if_reached();
END
break;
CASE(OGS_SBI_SERVICE_NAME_NNRF_DISC)
SWITCH(message.h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_NF_INSTANCES)
sbi_xact_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(sbi_xact_id >= OGS_MIN_POOL_ID &&
sbi_xact_id <= OGS_MAX_POOL_ID);
sbi_xact = ogs_sbi_xact_find_by_id(sbi_xact_id);
if (!sbi_xact) {
/* CLIENT_WAIT timer could remove SBI transaction
* before receiving SBI message */
ogs_error("SBI transaction has already been removed [%d]",
sbi_xact_id);
break;
}
SWITCH(message.h.method)
CASE(OGS_SBI_HTTP_METHOD_GET)
if (message.res_status == OGS_SBI_HTTP_STATUS_OK)
pcf_nnrf_handle_nf_discover(sbi_xact, &message);
else
ogs_error("HTTP response error [%d]",
message.res_status);
break;
DEFAULT
ogs_error("Invalid HTTP method [%s]", message.h.method);
ogs_assert_if_reached();
END
break;
DEFAULT
ogs_error("Invalid resource name [%s]",
message.h.resource.component[0]);
ogs_assert_if_reached();
END
break;
CASE(OGS_SBI_SERVICE_NAME_NUDR_DR)
SWITCH(message.h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_POLICY_DATA)
SWITCH(message.h.resource.component[3])
CASE(OGS_SBI_RESOURCE_NAME_AM_DATA)
sbi_xact_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(sbi_xact_id >= OGS_MIN_POOL_ID &&
sbi_xact_id <= OGS_MAX_POOL_ID);
sbi_xact = ogs_sbi_xact_find_by_id(sbi_xact_id);
if (!sbi_xact) {
/* CLIENT_WAIT timer could remove SBI transaction
* before receiving SBI message */
ogs_error(
"SBI transaction has already been removed [%d]",
sbi_xact_id);
break;
}
pcf_ue_id = sbi_xact->sbi_object_id;
ogs_assert(pcf_ue_id >= OGS_MIN_POOL_ID &&
pcf_ue_id <= OGS_MAX_POOL_ID);
if (sbi_xact->assoc_stream_id >= OGS_MIN_POOL_ID &&
sbi_xact->assoc_stream_id <= OGS_MAX_POOL_ID)
e->h.sbi.data =
OGS_UINT_TO_POINTER(sbi_xact->assoc_stream_id);
ogs_sbi_xact_remove(sbi_xact);
pcf_ue = pcf_ue_find_by_id(pcf_ue_id);
if (!pcf_ue) {
ogs_error("UE(pcf_ue) Context "
"has already been removed");
break;
}
e->pcf_ue_id = pcf_ue->id;
e->h.sbi.message = &message;
ogs_fsm_dispatch(&pcf_ue->sm, e);
if (OGS_FSM_CHECK(&pcf_ue->sm, pcf_am_state_exception)) {
ogs_error("[%s] State machine exception", pcf_ue->supi);
pcf_ue_remove(pcf_ue);
}
break;
CASE(OGS_SBI_RESOURCE_NAME_SM_DATA)
sbi_xact_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(sbi_xact_id >= OGS_MIN_POOL_ID &&
sbi_xact_id <= OGS_MAX_POOL_ID);
sbi_xact = ogs_sbi_xact_find_by_id(sbi_xact_id);
if (!sbi_xact) {
/* CLIENT_WAIT timer could remove SBI transaction
* before receiving SBI message */
ogs_error(
"SBI transaction has already been removed [%d]",
sbi_xact_id);
break;
}
sess_id = sbi_xact->sbi_object_id;
ogs_assert(sess_id >= OGS_MIN_POOL_ID &&
sess_id <= OGS_MAX_POOL_ID);
if (sbi_xact->assoc_stream_id >= OGS_MIN_POOL_ID &&
sbi_xact->assoc_stream_id <= OGS_MAX_POOL_ID)
e->h.sbi.data =
OGS_UINT_TO_POINTER(sbi_xact->assoc_stream_id);
ogs_sbi_xact_remove(sbi_xact);
sess = pcf_sess_find_by_id(sess_id);
if (!sess) {
ogs_error("Session has already been removed");
break;
}
pcf_ue = pcf_ue_find_by_id(sess->pcf_ue_id);
ogs_assert(pcf_ue);
e->sess_id = sess->id;
e->h.sbi.message = &message;
ogs_fsm_dispatch(&sess->sm, e);
if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
ogs_error("[%s:%d] State machine exception",
pcf_ue->supi, sess->psi);
pcf_sess_remove(sess);
}
break;
DEFAULT
ogs_error("Invalid resource name [%s]",
message.h.resource.component[3]);
ogs_assert_if_reached();
END
break;
DEFAULT
ogs_error("Invalid resource name [%s]",
message.h.resource.component[0]);
ogs_assert_if_reached();
END
break;
CASE(OGS_SBI_SERVICE_NAME_NBSF_MANAGEMENT)
SWITCH(message.h.resource.component[0])
CASE(OGS_SBI_RESOURCE_NAME_PCF_BINDINGS)
sbi_xact_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(sbi_xact_id >= OGS_MIN_POOL_ID &&
sbi_xact_id <= OGS_MAX_POOL_ID);
sbi_xact = ogs_sbi_xact_find_by_id(sbi_xact_id);
if (!sbi_xact) {
/* CLIENT_WAIT timer could remove SBI transaction
* before receiving SBI message */
ogs_error("SBI transaction has already been removed [%d]",
sbi_xact_id);
break;
}
sess_id = sbi_xact->sbi_object_id;
ogs_assert(sess_id >= OGS_MIN_POOL_ID &&
sess_id <= OGS_MAX_POOL_ID);
if (sbi_xact->assoc_stream_id >= OGS_MIN_POOL_ID &&
sbi_xact->assoc_stream_id <= OGS_MAX_POOL_ID)
e->h.sbi.data = OGS_UINT_TO_POINTER(sbi_xact->assoc_stream_id);
ogs_sbi_xact_remove(sbi_xact);
sess = pcf_sess_find_by_id(sess_id);
if (!sess) {
ogs_error("Session has already been removed");
break;
}
pcf_ue = pcf_ue_find_by_id(sess->pcf_ue_id);
ogs_assert(pcf_ue);
e->sess_id = sess->id;
e->h.sbi.message = &message;
ogs_fsm_dispatch(&sess->sm, e);
if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_exception)) {
ogs_error("[%s:%d] State machine exception",
pcf_ue->supi, sess->psi);
pcf_sess_remove(sess);
} else if (OGS_FSM_CHECK(&sess->sm, pcf_sm_state_deleted)) {
ogs_debug("[%s:%d] PCF session removed",
pcf_ue->supi, sess->psi);
pcf_sess_remove(sess);
}
break;
DEFAULT
ogs_error("Invalid resource name [%s]",
message.h.resource.component[0]);
ogs_assert_if_reached();
END
break;
DEFAULT
ogs_error("Invalid API name [%s]", message.h.service.name);
ogs_assert_if_reached();
END
ogs_sbi_message_free(&message);
ogs_sbi_response_free(response);
break;
case OGS_EVENT_SBI_TIMER:
ogs_assert(e);
switch(e->h.timer_id) {
case OGS_TIMER_NF_INSTANCE_REGISTRATION_INTERVAL:
case OGS_TIMER_NF_INSTANCE_HEARTBEAT_INTERVAL:
case OGS_TIMER_NF_INSTANCE_NO_HEARTBEAT:
case OGS_TIMER_NF_INSTANCE_VALIDITY:
nf_instance = e->h.sbi.data;
ogs_assert(nf_instance);
ogs_assert(OGS_FSM_STATE(&nf_instance->sm));
ogs_sbi_self()->nf_instance->load = pcf_instance_get_load();
ogs_fsm_dispatch(&nf_instance->sm, e);
if (OGS_FSM_CHECK(&nf_instance->sm, ogs_sbi_nf_state_exception))
ogs_error("[%s:%s] State machine exception [%d]",
OpenAPI_nf_type_ToString(nf_instance->nf_type),
nf_instance->id, e->h.timer_id);
break;
case OGS_TIMER_SUBSCRIPTION_VALIDITY:
subscription_data = e->h.sbi.data;
ogs_assert(subscription_data);
ogs_assert(true ==
ogs_nnrf_nfm_send_nf_status_subscribe(
ogs_sbi_self()->nf_instance->nf_type,
subscription_data->req_nf_instance_id,
subscription_data->subscr_cond.nf_type,
subscription_data->subscr_cond.service_name));
ogs_error("[%s] Subscription validity expired",
subscription_data->id);
ogs_sbi_subscription_data_remove(subscription_data);
break;
case OGS_TIMER_SUBSCRIPTION_PATCH:
subscription_data = e->h.sbi.data;
ogs_assert(subscription_data);
ogs_assert(true ==
ogs_nnrf_nfm_send_nf_status_update(subscription_data));
ogs_info("[%s] Need to update Subscription",
subscription_data->id);
break;
case OGS_TIMER_SBI_CLIENT_WAIT:
/*
* ogs_pollset_poll() receives the time of the expiration
* of next timer as an argument. If this timeout is
* in very near future (1 millisecond), and if there are
* multiple events that need to be processed by ogs_pollset_poll(),
* these could take more than 1 millisecond for processing,
* resulting in the timer already passed the expiration.
*
* In case that another NF is under heavy load and responds
* to an SBI request with some delay of a few seconds,
* it can happen that ogs_pollset_poll() adds SBI responses
* to the event list for further processing,
* then ogs_timer_mgr_expire() is called which will add
* an additional event for timer expiration. When all events are
* processed one-by-one, the SBI xact would get deleted twice
* in a row, resulting in a crash.
*
* 1. ogs_pollset_poll()
* message was received and put into an event list,
* 2. ogs_timer_mgr_expire()
* add an additional event for timer expiration
* 3. message event is processed. (free SBI xact)
* 4. timer expiration event is processed. (double-free SBI xact)
*
* To avoid double-free SBI xact,
* we need to check ogs_sbi_xact_find_by_id()
*/
sbi_xact_id = OGS_POINTER_TO_UINT(e->h.sbi.data);
ogs_assert(sbi_xact_id >= OGS_MIN_POOL_ID &&
sbi_xact_id <= OGS_MAX_POOL_ID);
sbi_xact = ogs_sbi_xact_find_by_id(sbi_xact_id);
if (!sbi_xact) {
ogs_error("SBI transaction has already been removed [%d]",
sbi_xact_id);
break;
}
sbi_object = sbi_xact->sbi_object;
ogs_assert(sbi_object);
ogs_assert(sbi_xact->assoc_stream_id >= OGS_MIN_POOL_ID &&
sbi_xact->assoc_stream_id <= OGS_MAX_POOL_ID);
stream = ogs_sbi_stream_find_by_id(sbi_xact->assoc_stream_id);
service_type = sbi_xact->service_type;
ogs_sbi_xact_remove(sbi_xact);
ogs_assert(sbi_object->type > OGS_SBI_OBJ_BASE &&
sbi_object->type < OGS_SBI_OBJ_TOP);
switch(sbi_object->type) {
case OGS_SBI_OBJ_UE_TYPE:
pcf_ue_id = sbi_xact->sbi_object_id;
ogs_assert(pcf_ue_id >= OGS_MIN_POOL_ID &&
pcf_ue_id <= OGS_MAX_POOL_ID);
pcf_ue = pcf_ue_find_by_id(pcf_ue_id);
if (!pcf_ue) {
ogs_error("UE(pcf_ue) has already been removed");
break;
}
ogs_error("[%s] Cannot receive SBI message", pcf_ue->supi);
break;
case OGS_SBI_OBJ_SESS_TYPE:
sess_id = sbi_xact->sbi_object_id;
ogs_assert(sess_id >= OGS_MIN_POOL_ID &&
sess_id <= OGS_MAX_POOL_ID);
sess = pcf_sess_find_by_id(sess_id);
if (!sess) {
ogs_error("Session has already been removed");
break;
}
ogs_error("[%d] Cannot receive SBI message", sess->psi);
break;
default:
ogs_fatal("Not implemented [%s:%d]",
ogs_sbi_service_type_to_name(service_type),
sbi_object->type);
ogs_assert_if_reached();
}
ogs_error("Cannot receive SBI message");
if (!stream) {
ogs_error("STREAM has alreadt been removed [%d]",
sbi_xact->assoc_stream_id);
break;
}
ogs_assert(true ==
ogs_sbi_server_send_error(stream,
OGS_SBI_HTTP_STATUS_GATEWAY_TIMEOUT, NULL,
"Cannot receive SBI message", NULL, NULL));
break;
default:
ogs_error("Unknown timer[%s:%d]",
ogs_timer_get_name(e->h.timer_id), e->h.timer_id);
}
break;
default:
ogs_error("No handler for event %s", pcf_event_get_name(e));
break;
}
}
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