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8484a5af60
If eg. PCRF or AAA diameter link is not yet ready (eg. PCRF crashed), and a client sends a CreateSessionRequest announcing its ow F-TEID, then open5gs-smfd answers with Create Session Response Cause= "Remote peer not responding", but it is not setting the received F-TEID in the header of the response, instead it sends with TEI=0. As a result, the peer cannot match the CreateSessionResponse, and needs to rely on its own timeout timer to figure out that specific request failed. To address this issue, I modified the GTP Response message to check the Sender F-TEID and send it accordingly, setting the destination TEID to the value of the Sender F-TEID. I've made this modification only for SMF, but MME and SGW-C have not done so; if you need to, you can work from the examples in SMF. Similarly, the same situation can happen with PFCP. If anyone needs to do this in the future, I think you can work on it this way.
48 lines
1.4 KiB
C
48 lines
1.4 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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#if !defined(OGS_GTP_INSIDE) && !defined(OGS_GTP_COMPILATION)
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#error "This header cannot be included directly."
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#endif
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#ifndef OGS_GTP_UTIL_H
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#define OGS_GTP_UTIL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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int ogs_gtpu_parse_header(
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ogs_gtp2_header_desc_t *header_desc, ogs_pkbuf_t *pkbuf);
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uint16_t ogs_in_cksum(uint16_t *addr, int len);
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typedef struct ogs_gtp2_sender_f_teid_s {
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bool teid_presence;
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uint32_t teid;
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} ogs_gtp2_sender_f_teid_t;
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void ogs_gtp2_sender_f_teid(
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ogs_gtp2_sender_f_teid_t *sender_f_teid, ogs_gtp2_message_t *message);
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#ifdef __cplusplus
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}
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#endif
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#endif /* OGS_GTP_UTIL_H */
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