forked from acouzens/open5gs
502 lines
18 KiB
C
502 lines
18 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 "nsmf-handler.h"
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#include "nas-path.h"
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#include "ngap-path.h"
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#include "sbi-path.h"
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#include "gmm-build.h"
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int amf_nsmf_pdu_session_handle_create_sm_context(
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amf_sess_t *sess, ogs_sbi_message_t *recvmsg)
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{
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int rv;
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ogs_assert(sess);
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ogs_assert(recvmsg);
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if (recvmsg->res_status == OGS_SBI_HTTP_STATUS_CREATED) {
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ogs_sbi_message_t message;
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ogs_sbi_header_t header;
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if (!recvmsg->http.location) {
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ogs_error("[%d:%d] No http.location", sess->psi, sess->pti);
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nas_5gs_send_back_5gsm_message_from_sbi(sess,
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OGS_SBI_HTTP_STATUS_INTERNAL_SERVER_ERROR);
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return OGS_ERROR;
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}
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memset(&header, 0, sizeof(header));
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header.uri = recvmsg->http.location;
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rv = ogs_sbi_parse_header(&message, &header);
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if (rv != OGS_OK) {
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ogs_error("[%d:%d] Cannot parse http.location [%s]",
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sess->psi, sess->pti, recvmsg->http.location);
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nas_5gs_send_back_5gsm_message_from_sbi(sess,
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OGS_SBI_HTTP_STATUS_INTERNAL_SERVER_ERROR);
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return OGS_ERROR;
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}
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if (!message.h.resource.component[1]) {
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ogs_error("[%d:%d] No SmContextRef [%s]",
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sess->psi, sess->pti, recvmsg->http.location);
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ogs_sbi_header_free(&header);
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nas_5gs_send_back_5gsm_message_from_sbi(sess,
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OGS_SBI_HTTP_STATUS_INTERNAL_SERVER_ERROR);
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return OGS_ERROR;
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}
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if (sess->pdu_session_establishment_accept) {
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/*
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* [1-SERVER] /namf-comm/v1/ue-contexts/{supi}/n1-n2-messages
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* [2-CLIENT] /nsmf-pdusession/v1/sm-contexts
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*
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* If [1-SERVER] arrives before [2-CLIENT],
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* there is no sm-context-ref. The PDU session establishment accept
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* stored in [1-SERVER] is now trasnmitted to gNB.
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*/
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amf_ue_t *amf_ue = sess->amf_ue;
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ogs_assert(amf_ue);
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rv = nas_5gs_send_to_gnb(amf_ue,
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sess->pdu_session_establishment_accept);
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sess->pdu_session_establishment_accept = NULL;
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if (rv != OGS_OK) {
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ogs_error("[%d:%d] nas_5gs_send_to_gnb() failed",
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sess->psi, sess->pti);
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ogs_sbi_header_free(&header);
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nas_5gs_send_back_5gsm_message_from_sbi(sess,
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OGS_SBI_HTTP_STATUS_INTERNAL_SERVER_ERROR);
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return OGS_ERROR;
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}
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}
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if (sess->sm_context_ref)
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ogs_free(sess->sm_context_ref);
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sess->sm_context_ref = ogs_strdup(message.h.resource.component[1]);
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ogs_sbi_header_free(&header);
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} else {
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OpenAPI_sm_context_create_error_t *SmContextCreateError = NULL;
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OpenAPI_ref_to_binary_data_t *n1SmMsg = NULL;
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ogs_pkbuf_t *n1smbuf = NULL;
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SmContextCreateError = recvmsg->SmContextCreateError;
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if (!SmContextCreateError) {
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ogs_error("[%d:%d] No SmContextCreateError", sess->psi, sess->pti);
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nas_5gs_send_back_5gsm_message_from_sbi(sess, recvmsg->res_status);
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return OGS_ERROR;
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}
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if (!SmContextCreateError->error) {
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ogs_error("[%d:%d] No Error", sess->psi, sess->pti);
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nas_5gs_send_back_5gsm_message_from_sbi(sess, recvmsg->res_status);
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return OGS_ERROR;
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}
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n1SmMsg = SmContextCreateError->n1_sm_msg;
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if (n1SmMsg && n1SmMsg->content_id) {
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n1smbuf = ogs_sbi_find_part_by_content_id(
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recvmsg, n1SmMsg->content_id);
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if (n1smbuf) {
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/*
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* NOTE : The pkbuf created in the SBI message will be removed
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* from ogs_sbi_message_free(), so it must be copied.
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*/
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n1smbuf = ogs_pkbuf_copy(n1smbuf);
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ogs_assert(n1smbuf);
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nas_5gs_send_gsm_reject_from_sbi(sess,
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OGS_NAS_PAYLOAD_CONTAINER_N1_SM_INFORMATION,
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n1smbuf, recvmsg->res_status);
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return OGS_ERROR;
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}
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}
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nas_5gs_send_back_5gsm_message_from_sbi(sess, recvmsg->res_status);
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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int amf_nsmf_pdu_session_handle_update_sm_context(
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amf_sess_t *sess, int state, ogs_sbi_message_t *recvmsg)
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{
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amf_ue_t *amf_ue = NULL;
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ogs_assert(sess);
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amf_ue = sess->amf_ue;
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ogs_assert(amf_ue);
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ogs_assert(recvmsg);
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if (recvmsg->res_status == OGS_SBI_HTTP_STATUS_NO_CONTENT ||
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recvmsg->res_status == OGS_SBI_HTTP_STATUS_OK) {
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OpenAPI_sm_context_updated_data_t *SmContextUpdatedData = NULL;
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OpenAPI_ref_to_binary_data_t *n1SmMsg = NULL;
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OpenAPI_ref_to_binary_data_t *n2SmInfo = NULL;
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ogs_pkbuf_t *n1smbuf = NULL;
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ogs_pkbuf_t *n2smbuf = NULL;
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if (recvmsg->SmContextUpdatedData &&
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recvmsg->SmContextUpdatedData->n2_sm_info) {
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SmContextUpdatedData = recvmsg->SmContextUpdatedData;
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ogs_assert(SmContextUpdatedData);
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n2SmInfo = SmContextUpdatedData->n2_sm_info;
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ogs_assert(n2SmInfo);
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if (n2SmInfo->content_id) {
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n2smbuf = ogs_sbi_find_part_by_content_id(
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recvmsg, n2SmInfo->content_id);
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}
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n1SmMsg = SmContextUpdatedData->n1_sm_msg;
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if (n1SmMsg && n1SmMsg->content_id) {
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n1smbuf = ogs_sbi_find_part_by_content_id(
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recvmsg, n1SmMsg->content_id);
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}
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switch (SmContextUpdatedData->n2_sm_info_type) {
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case OpenAPI_n2_sm_info_type_PDU_RES_SETUP_REQ:
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if (!n2smbuf) {
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ogs_error("[%s:%d] No N2 SM Content",
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amf_ue->supi, sess->psi);
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nas_5gs_send_gmm_reject(amf_ue,
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OGS_5GMM_CAUSE_5GS_SERVICES_NOT_ALLOWED);
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return OGS_ERROR;
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}
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/*
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* To Deliver N2 SM Content to gNB Temporarily,
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* Store N2 SM Context in Session Context
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*/
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if (sess->pdu_session_resource_setup_request_transfer) {
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/*
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* It should not be reached this way.
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* If the problem occurred, free the old n2smbuf
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*/
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ogs_error("[%s:%d] N2 SM Content is duplicated",
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amf_ue->supi, sess->psi);
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ogs_pkbuf_free(
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sess->pdu_session_resource_setup_request_transfer);
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}
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/*
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* NOTE : The pkbuf created in the SBI message will be removed
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* from ogs_sbi_message_free().
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* So it must be copied and push a event queue.
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*/
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sess->pdu_session_resource_setup_request_transfer =
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ogs_pkbuf_copy(n2smbuf);
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ogs_assert(sess->pdu_session_resource_setup_request_transfer);
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if (SESSION_SYNC_DONE(amf_ue)) {
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nas_5gs_send_accept(amf_ue);
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/*
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* After sending accept message, N2 SM context is freed
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* For checking memory, NULL pointer should be set to n2smbuf.
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*/
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ogs_list_for_each(&amf_ue->sess_list, sess) {
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if (sess->pdu_session_resource_setup_request_transfer) {
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ogs_pkbuf_free(sess->
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pdu_session_resource_setup_request_transfer);
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sess->pdu_session_resource_setup_request_transfer =
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NULL;
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}
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}
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}
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break;
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case OpenAPI_n2_sm_info_type_PDU_RES_REL_CMD:
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if (!n1smbuf) {
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ogs_error("[%s:%d] No N1 SM Content [%s]",
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amf_ue->supi, sess->psi, n1SmMsg->content_id);
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nas_5gs_send_back_5gsm_message(sess,
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OGS_5GSM_CAUSE_SEMANTICALLY_INCORRECT_MESSAGE);
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return OGS_ERROR;
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}
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/*
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* NOTE : The pkbuf created in the SBI message will be removed
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* from ogs_sbi_message_free(), so it must be copied.
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*/
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n1smbuf = ogs_pkbuf_copy(n1smbuf);
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ogs_assert(n1smbuf);
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n2smbuf = ogs_pkbuf_copy(n2smbuf);
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ogs_assert(n2smbuf);
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nas_send_pdu_session_release_command(sess, n1smbuf, n2smbuf);
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break;
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default:
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ogs_error("Not implemented [%d]",
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SmContextUpdatedData->n2_sm_info_type);
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ngap_send_error_indication2(amf_ue,
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NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
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}
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} else {
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if (state == AMF_UPDATE_SM_CONTEXT_ACTIVATED) {
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/*
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* 1. PDUSessionResourceSetupResponse
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* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
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* 3. PFCP Session Modifcation Request (OuterHeaderCreation)
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* 4. PFCP Session Modifcation Response
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*/
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/*
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* 1. InitialContextSetupResponse
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* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
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* 3. PFCP Session Modifcation Request (Apply: FORWARD)
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* 4. PFCP Session Modifcation Response
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*/
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} else if (state == AMF_UPDATE_SM_CONTEXT_DEACTIVATED) {
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/*
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* 1. UEContextReleaseRequest
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* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
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* 3. PFCP Session Modifcation Request (Apply:Buff & NOCP)
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* 4. PFCP Session Modifcation Response
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* 5. UEContextReleaseCommand
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* 6. UEContextReleaseComplete
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*/
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if (SESSION_SYNC_DONE(amf_ue)) {
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ngap_send_amf_ue_context_release_command(amf_ue,
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NGAP_Cause_PR_nas, NGAP_CauseNas_normal_release,
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NGAP_UE_CTX_REL_NG_CONTEXT_REMOVE, 0);
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}
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} else if (state == AMF_UPDATE_SM_CONTEXT_ACTIVATING) {
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/* Not reached here */
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} else if (state == AMF_UPDATE_SM_CONTEXT_N2_RELEASED) {
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/*
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* 1. PDUSessionResourceReleaseResponse
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* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
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*/
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ogs_debug("[%s:%d] Receive Update SM context(N2-RELEASED)",
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amf_ue->supi, sess->psi);
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sess->n2_released = true;
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} else if (state == AMF_UPDATE_SM_CONTEXT_N1_RELEASED) {
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/*
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* 1. PDU session release complete
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* CLEAR_SM_CONTEXT_REF(sess) in gmm-handler.c
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* 2. /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify
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*/
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ogs_debug("[%s:%d] Receive Update SM context(N1-RELEASED)",
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amf_ue->supi, sess->psi);
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sess->n1_released = true;
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} else {
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ogs_error("Invalid STATE[%d]", state);
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}
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/*
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* If resource-status has already been updated by
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* notify(/namf-callback/v1/{supi}/sm-context-status/{psi})
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* Remove 'amf_sess_t' context to call
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* amf_nsmf_pdu_session_handle_release_sm_context().
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*/
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if (sess->n1_released == true &&
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sess->n2_released == true &&
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sess->resource_status == OpenAPI_resource_status_RELEASED) {
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ogs_debug("[%s:%d] SM context remove", amf_ue->supi, sess->psi);
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amf_nsmf_pdu_session_handle_release_sm_context(
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sess, AMF_RELEASE_SM_CONTEXT_NO_STATE);
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}
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}
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} else {
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amf_ue_t *amf_ue = NULL;
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OpenAPI_sm_context_update_error_t *SmContextUpdateError = NULL;
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OpenAPI_ref_to_binary_data_t *n1SmMsg = NULL;
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ogs_pkbuf_t *n1smbuf = NULL;
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#if 0 /* Is it needed? */
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OpenAPI_ref_to_binary_data_t *n2SmInfo = NULL;
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ogs_pkbuf_t *n2smbuf = NULL;
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#endif
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amf_ue = sess->amf_ue;
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ogs_assert(amf_ue);
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SmContextUpdateError = recvmsg->SmContextUpdateError;
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if (!SmContextUpdateError) {
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ogs_error("[%d:%d] No SmContextUpdateError", sess->psi, sess->pti);
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ngap_send_error_indication2(amf_ue,
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NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
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return OGS_ERROR;
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}
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if (!SmContextUpdateError->error) {
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ogs_error("[%d:%d] No Error", sess->psi, sess->pti);
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ngap_send_error_indication2(amf_ue,
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NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
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return OGS_ERROR;
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}
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n1SmMsg = SmContextUpdateError->n1_sm_msg;
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if (n1SmMsg && n1SmMsg->content_id) {
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n1smbuf = ogs_sbi_find_part_by_content_id(
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recvmsg, n1SmMsg->content_id);
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if (n1smbuf) {
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/*
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* NOTE : The pkbuf created in the SBI message will be removed
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* from ogs_sbi_message_free(), so it must be copied.
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*/
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n1smbuf = ogs_pkbuf_copy(n1smbuf);
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ogs_assert(n1smbuf);
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nas_5gs_send_gsm_reject_from_sbi(sess,
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OGS_NAS_PAYLOAD_CONTAINER_N1_SM_INFORMATION,
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n1smbuf, recvmsg->res_status);
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return OGS_ERROR;
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}
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}
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#if 0 /* Is it needed? */
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n2SmInfo = SmContextUpdateError->n2_sm_info;
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if (!n2SmInfo || !n2SmInfo->content_id) {
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ogs_error("[%d:%d] No N2 SM Message", sess->psi, sess->pti);
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ngap_send_error_indication2(amf_ue,
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NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
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return OGS_ERROR;
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}
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n2smbuf = ogs_sbi_find_part_by_content_id(
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recvmsg, n2SmInfo->content_id);
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if (!n2smbuf) {
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ogs_error("[%d:%d] No N2 SM Content [%s]",
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sess->psi, sess->pti, n2SmInfo->content_id);
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ngap_send_error_indication2(amf_ue,
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NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
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return OGS_ERROR;
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}
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#endif
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ngap_send_error_indication2(amf_ue,
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NGAP_Cause_PR_protocol, NGAP_CauseProtocol_semantic_error);
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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int amf_nsmf_pdu_session_handle_release_sm_context(amf_sess_t *sess, int state)
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{
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amf_ue_t *amf_ue = NULL;
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ogs_assert(sess);
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amf_ue = sess->amf_ue;
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ogs_assert(amf_ue);
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amf_sess_remove(sess);
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/* Check last session */
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if (ogs_list_count(&amf_ue->sess_list) == 0) {
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if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_authentication)) {
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amf_ue_sbi_discover_and_send(OpenAPI_nf_type_AUSF, amf_ue, NULL,
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amf_nausf_auth_build_authenticate);
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} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_de_registered)) {
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nas_5gs_send_de_registration_accept(amf_ue);
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} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_exception)) {
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/*
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* 1. GMM Exception
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* 2. Release All SM contexts
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* 3. UE Context release command
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* 4. UE Context release complete
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*/
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ngap_send_amf_ue_context_release_command(amf_ue,
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NGAP_Cause_PR_nas, NGAP_CauseNas_normal_release,
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NGAP_UE_CTX_REL_UE_CONTEXT_REMOVE, 0);
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} else {
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if (state == AMF_RELEASE_SM_CONTEXT_NG_CONTEXT_REMOVE) {
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/*
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* 1. Initial context setup failure
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* 2. Release All SM contexts
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* 3. UE Context release command
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* 4. UE Context release complete
|
|
*/
|
|
ngap_send_amf_ue_context_release_command(amf_ue,
|
|
NGAP_Cause_PR_nas, NGAP_CauseNas_normal_release,
|
|
NGAP_UE_CTX_REL_NG_CONTEXT_REMOVE, 0);
|
|
|
|
} else if (state == AMF_RELEASE_SM_CONTEXT_REGISTRATION_ACCEPT) {
|
|
/*
|
|
* 1. Registration request
|
|
* 2. Release All SM contexts
|
|
* 3. Registration accept
|
|
*/
|
|
nas_5gs_send_registration_accept(amf_ue);
|
|
|
|
} else if (state == AMF_RELEASE_SM_CONTEXT_SERVICE_ACCEPT) {
|
|
/*
|
|
* 1. Service request
|
|
* 2. Release All SM contexts
|
|
* 3. Service accept
|
|
*/
|
|
nas_5gs_send_service_accept(amf_ue);
|
|
|
|
} else {
|
|
ogs_fatal("Unknown state[%d]", state);
|
|
if (OGS_FSM_CHECK(&amf_ue->sm,
|
|
gmm_state_initial_context_setup)) {
|
|
ogs_fatal("Release SM Context in initial-context-setup");
|
|
} else if (OGS_FSM_CHECK(&amf_ue->sm, gmm_state_registered)) {
|
|
|
|
ogs_fatal("Release SM Context in registered");
|
|
|
|
} else if (OGS_FSM_CHECK(
|
|
&amf_ue->sm, gmm_state_security_mode)) {
|
|
ogs_fatal("Release SM Context in security-mode");
|
|
} else {
|
|
ogs_fatal("Release SM Context : INVALID STATE");
|
|
|
|
}
|
|
ogs_assert_if_reached();
|
|
}
|
|
}
|
|
}
|
|
|
|
return OGS_OK;
|
|
}
|