forked from acouzens/open5gs
112 lines
2.9 KiB
C
112 lines
2.9 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 "upf-sm.h"
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#include "context.h"
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#include "event.h"
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#include "pfcp-path.h"
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#include "gtp-path.h"
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void upf_state_initial(ogs_fsm_t *s, upf_event_t *e)
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{
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upf_sm_debug(e);
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ogs_assert(s);
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OGS_FSM_TRAN(s, &upf_state_operational);
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}
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void upf_state_final(ogs_fsm_t *s, upf_event_t *e)
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{
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upf_sm_debug(e);
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ogs_assert(s);
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}
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void upf_state_operational(ogs_fsm_t *s, upf_event_t *e)
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{
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int rv;
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ogs_pkbuf_t *recvbuf = NULL;
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ogs_pfcp_message_t *pfcp_message = NULL;
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ogs_pfcp_node_t *node = NULL;
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ogs_pfcp_xact_t *xact = NULL;
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upf_sm_debug(e);
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ogs_assert(s);
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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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case UPF_EVT_N4_MESSAGE:
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ogs_assert(e);
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recvbuf = e->pkbuf;
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ogs_assert(recvbuf);
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node = e->pfcp_node;
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ogs_assert(node);
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/*
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* Issue #1911
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*
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* Because ogs_pfcp_message_t is over 80kb in size,
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* it can cause stack overflow.
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* To avoid this, the pfcp_message structure uses heap memory.
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*/
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if ((pfcp_message = ogs_pfcp_parse_msg(recvbuf)) == NULL) {
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ogs_error("ogs_pfcp_parse_msg() failed");
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ogs_pkbuf_free(recvbuf);
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break;
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}
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rv = ogs_pfcp_xact_receive(node, &pfcp_message->h, &xact);
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if (rv != OGS_OK) {
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ogs_pkbuf_free(recvbuf);
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ogs_pfcp_message_free(pfcp_message);
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break;
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}
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e->pfcp_message = pfcp_message;
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e->pfcp_xact = xact;
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ogs_fsm_dispatch(&node->sm, e);
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if (OGS_FSM_CHECK(&node->sm, upf_pfcp_state_exception)) {
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ogs_error("PFCP state machine exception");
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}
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ogs_pkbuf_free(recvbuf);
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ogs_pfcp_message_free(pfcp_message);
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break;
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case UPF_EVT_N4_TIMER:
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case UPF_EVT_N4_NO_HEARTBEAT:
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node = e->pfcp_node;
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ogs_assert(node);
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ogs_assert(OGS_FSM_STATE(&node->sm));
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ogs_fsm_dispatch(&node->sm, e);
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break;
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default:
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ogs_error("No handler for event %s", upf_event_get_name(e));
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break;
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}
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}
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