314 lines
9.1 KiB
C
314 lines
9.1 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "context.h"
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#include "event.h"
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#include "timer.h"
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#include "upf-sm.h"
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#include "pfcp-path.h"
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#include "n4-handler.h"
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static void node_timeout(ogs_pfcp_xact_t *xact, void *data);
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void upf_pfcp_state_initial(ogs_fsm_t *s, upf_event_t *e)
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{
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int rv;
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ogs_pfcp_node_t *node = NULL;
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ogs_assert(s);
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ogs_assert(e);
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upf_sm_debug(e);
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node = e->pfcp_node;
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ogs_assert(node);
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rv = ogs_pfcp_connect(
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ogs_pfcp_self()->pfcp_sock, ogs_pfcp_self()->pfcp_sock6, node);
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ogs_assert(rv == OGS_OK);
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node->t_no_heartbeat = ogs_timer_add(ogs_app()->timer_mgr,
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upf_timer_no_heartbeat, node);
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ogs_assert(node->t_no_heartbeat);
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OGS_FSM_TRAN(s, &upf_pfcp_state_will_associate);
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}
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void upf_pfcp_state_final(ogs_fsm_t *s, upf_event_t *e)
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{
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ogs_pfcp_node_t *node = NULL;
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ogs_assert(s);
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ogs_assert(e);
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upf_sm_debug(e);
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node = e->pfcp_node;
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ogs_assert(node);
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ogs_timer_delete(node->t_no_heartbeat);
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}
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void upf_pfcp_state_will_associate(ogs_fsm_t *s, upf_event_t *e)
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{
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char buf[OGS_ADDRSTRLEN];
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ogs_pfcp_node_t *node = NULL;
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ogs_pfcp_xact_t *xact = NULL;
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ogs_pfcp_message_t *message = NULL;
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ogs_sockaddr_t *addr = NULL;
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ogs_assert(s);
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ogs_assert(e);
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upf_sm_debug(e);
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node = e->pfcp_node;
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ogs_assert(node);
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switch (e->id) {
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case OGS_FSM_ENTRY_SIG:
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if (node->t_association) {
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ogs_timer_start(node->t_association,
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ogs_app()->time.message.pfcp.association_interval);
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ogs_pfcp_up_send_association_setup_request(node, node_timeout);
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}
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break;
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case OGS_FSM_EXIT_SIG:
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if (node->t_association) {
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ogs_timer_stop(node->t_association);
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}
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break;
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case UPF_EVT_N4_TIMER:
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switch(e->timer_id) {
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case UPF_TIMER_ASSOCIATION:
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addr = node->sa_list;
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ogs_assert(addr);
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ogs_warn("Retry to association with peer [%s]:%d failed",
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OGS_ADDR(addr, buf), OGS_PORT(addr));
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ogs_assert(node->t_association);
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ogs_timer_start(node->t_association,
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ogs_app()->time.message.pfcp.association_interval);
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ogs_pfcp_up_send_association_setup_request(node, node_timeout);
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break;
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default:
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ogs_error("Unknown timer[%s:%d]",
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upf_timer_get_name(e->timer_id), e->timer_id);
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break;
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}
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break;
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case UPF_EVT_N4_MESSAGE:
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message = e->pfcp_message;
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ogs_assert(message);
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xact = e->pfcp_xact;
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ogs_assert(xact);
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switch (message->h.type) {
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case OGS_PFCP_ASSOCIATION_SETUP_REQUEST_TYPE:
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ogs_pfcp_up_handle_association_setup_request(node, xact,
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&message->pfcp_association_setup_request);
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OGS_FSM_TRAN(s, upf_pfcp_state_associated);
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break;
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case OGS_PFCP_ASSOCIATION_SETUP_RESPONSE_TYPE:
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ogs_pfcp_up_handle_association_setup_response(node, xact,
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&message->pfcp_association_setup_response);
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OGS_FSM_TRAN(s, upf_pfcp_state_associated);
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break;
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default:
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ogs_warn("cannot handle PFCP message type[%d]",
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message->h.type);
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break;
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}
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break;
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default:
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ogs_error("Unknown event %s", upf_event_get_name(e));
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break;
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}
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}
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void upf_pfcp_state_associated(ogs_fsm_t *s, upf_event_t *e)
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{
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char buf[OGS_ADDRSTRLEN];
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ogs_pfcp_node_t *node = NULL;
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ogs_pfcp_xact_t *xact = NULL;
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ogs_pfcp_message_t *message = NULL;
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ogs_sockaddr_t *addr = NULL;
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upf_sess_t *sess = NULL;
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ogs_assert(s);
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ogs_assert(e);
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upf_sm_debug(e);
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node = e->pfcp_node;
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ogs_assert(node);
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addr = node->sa_list;
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ogs_assert(addr);
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switch (e->id) {
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case OGS_FSM_ENTRY_SIG:
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ogs_info("PFCP associated");
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ogs_timer_start(node->t_no_heartbeat,
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ogs_app()->time.message.pfcp.no_heartbeat_duration);
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break;
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case OGS_FSM_EXIT_SIG:
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ogs_info("PFCP de-associated");
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ogs_timer_stop(node->t_no_heartbeat);
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break;
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case UPF_EVT_N4_MESSAGE:
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message = e->pfcp_message;
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ogs_assert(message);
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xact = e->pfcp_xact;
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ogs_assert(xact);
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if (message->h.seid_presence && message->h.seid != 0)
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sess = upf_sess_find_by_upf_n4_seid(message->h.seid);
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switch (message->h.type) {
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case OGS_PFCP_HEARTBEAT_REQUEST_TYPE:
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ogs_assert(true ==
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ogs_pfcp_handle_heartbeat_request(node, xact,
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&message->pfcp_heartbeat_request));
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break;
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case OGS_PFCP_HEARTBEAT_RESPONSE_TYPE:
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ogs_assert(true ==
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ogs_pfcp_handle_heartbeat_response(node, xact,
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&message->pfcp_heartbeat_response));
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break;
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case OGS_PFCP_ASSOCIATION_SETUP_REQUEST_TYPE:
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ogs_warn("PFCP[REQ] has already been associated");
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ogs_pfcp_up_handle_association_setup_request(node, xact,
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&message->pfcp_association_setup_request);
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break;
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case OGS_PFCP_ASSOCIATION_SETUP_RESPONSE_TYPE:
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ogs_warn("PFCP[RSP] has already been associated");
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ogs_pfcp_up_handle_association_setup_response(node, xact,
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&message->pfcp_association_setup_response);
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break;
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case OGS_PFCP_SESSION_ESTABLISHMENT_REQUEST_TYPE:
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if (message->h.seid_presence && message->h.seid == 0) {
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ogs_expect(!sess);
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sess = upf_sess_add_by_message(message);
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if (sess)
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OGS_SETUP_PFCP_NODE(sess, node);
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}
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upf_n4_handle_session_establishment_request(
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sess, xact, &message->pfcp_session_establishment_request);
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break;
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case OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE:
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upf_n4_handle_session_modification_request(
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sess, xact, &message->pfcp_session_modification_request);
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break;
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case OGS_PFCP_SESSION_DELETION_REQUEST_TYPE:
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upf_n4_handle_session_deletion_request(
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sess, xact, &message->pfcp_session_deletion_request);
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break;
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case OGS_PFCP_SESSION_REPORT_RESPONSE_TYPE:
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upf_n4_handle_session_report_response(
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sess, xact, &message->pfcp_session_report_response);
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break;
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default:
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ogs_error("Not implemented PFCP message type[%d]",
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message->h.type);
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break;
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}
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break;
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case UPF_EVT_N4_TIMER:
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switch(e->timer_id) {
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case UPF_TIMER_NO_HEARTBEAT:
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node = e->pfcp_node;
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ogs_assert(node);
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ogs_assert(OGS_OK ==
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ogs_pfcp_send_heartbeat_request(node, node_timeout));
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break;
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default:
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ogs_error("Unknown timer[%s:%d]",
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upf_timer_get_name(e->timer_id), e->timer_id);
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break;
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}
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break;
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case UPF_EVT_N4_NO_HEARTBEAT:
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ogs_warn("No Heartbeat from SMF [%s]:%d",
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OGS_ADDR(addr, buf), OGS_PORT(addr));
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OGS_FSM_TRAN(s, upf_pfcp_state_will_associate);
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break;
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default:
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ogs_error("Unknown event %s", upf_event_get_name(e));
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break;
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}
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}
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void upf_pfcp_state_exception(ogs_fsm_t *s, upf_event_t *e)
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{
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ogs_assert(s);
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ogs_assert(e);
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upf_sm_debug(e);
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switch (e->id) {
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case OGS_FSM_ENTRY_SIG:
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break;
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case OGS_FSM_EXIT_SIG:
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break;
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default:
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ogs_error("Unknown event %s", upf_event_get_name(e));
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break;
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}
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}
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static void node_timeout(ogs_pfcp_xact_t *xact, void *data)
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{
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int rv;
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upf_event_t *e = NULL;
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uint8_t type;
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ogs_assert(xact);
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type = xact->seq[0].type;
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switch (type) {
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case OGS_PFCP_HEARTBEAT_REQUEST_TYPE:
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ogs_assert(data);
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e = upf_event_new(UPF_EVT_N4_NO_HEARTBEAT);
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e->pfcp_node = data;
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rv = ogs_queue_push(ogs_app()->queue, e);
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if (rv != OGS_OK) {
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ogs_error("ogs_queue_push() failed:%d", (int)rv);
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upf_event_free(e);
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}
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break;
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case OGS_PFCP_ASSOCIATION_SETUP_REQUEST_TYPE:
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break;
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default:
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ogs_error("Not implemented [type:%d]", type);
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break;
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}
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}
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