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If the UE continuously attempts to Attach while changing PDN Type, it will cause the wrong IP to be assigned. (e.g PDU-Type : IPv4v6 -> IPv4 -> IPv4v6) This is because we use two variables at the same time, one to read and store the Static IP from the Subscriber DB and one to store the IP assigned from SMF, called session->paa. When the UE attaches with PDN-Type set to IPv4v6, MME saves the allocated IP in session->paa. However, MME thinks it has been assigned a static IP based on the information in session->paa, so changing the PDN-Type may result in the wrong IP being assigned. To solve this problem, I separated the variable(session->paa) that stores the allocated IP received from SMF and the variable(session->ue_ip) that stores the Static IP read from the Subscriber DB. Therefore, the information read from the Subscriber DB (session->session_type and session->ue_ip) should not be modified.
51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
/*
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* Copyright (C) 2019,2020 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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#ifndef TEST_ESM_BUILD_H
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#define TEST_ESM_BUILD_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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ogs_pkbuf_t *testesm_build_pdn_connectivity_request(
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test_sess_t *sess, bool integrity_protected, uint8_t pdn_type);
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ogs_pkbuf_t *testesm_build_pdn_disconnect_request(test_sess_t *sess);
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ogs_pkbuf_t *testesm_build_esm_information_response(test_sess_t *sess);
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ogs_pkbuf_t *testesm_build_activate_default_eps_bearer_context_accept(
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test_bearer_t *bearer, bool integrity_protected_and_ciphered);
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ogs_pkbuf_t *testesm_build_activate_dedicated_eps_bearer_context_accept(
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test_bearer_t *bearer);
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ogs_pkbuf_t *testesm_build_activate_dedicated_eps_bearer_context_reject(
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test_bearer_t *bearer, uint8_t esm_cause);
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ogs_pkbuf_t *testesm_build_modify_eps_bearer_context_accept(
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test_bearer_t *bearer);
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ogs_pkbuf_t *testesm_build_deactivate_eps_bearer_context_accept(
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test_bearer_t *bearer);
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ogs_pkbuf_t *testesm_build_bearer_resource_allocation_request(
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test_bearer_t *bearer);
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ogs_pkbuf_t *testesm_build_bearer_resource_modification_request(
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test_bearer_t *bearer, uint8_t tft_code, uint8_t qci, uint8_t esm_cause);
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#ifdef __cplusplus
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}
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#endif
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#endif /* TEST_ESM_BUILD_H */
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