forked from acouzens/open5gs
493 lines
16 KiB
C
493 lines
16 KiB
C
/*
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* Copyright (C) 2019-2024 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 "pfcp-path.h"
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#include "gtp-path.h"
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#include "n4-handler.h"
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static void upf_n4_handle_create_urr(upf_sess_t *sess, ogs_pfcp_tlv_create_urr_t *create_urr_arr,
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uint8_t *cause_value, uint8_t *offending_ie_value)
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{
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int i;
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ogs_pfcp_urr_t *urr;
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*cause_value = OGS_PFCP_CAUSE_REQUEST_ACCEPTED;
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for (i = 0; i < OGS_MAX_NUM_OF_URR; i++) {
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urr = ogs_pfcp_handle_create_urr(&sess->pfcp, &create_urr_arr[i],
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cause_value, offending_ie_value);
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if (!urr)
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return;
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/* TODO: enable counters somewhere else if ISTM not set, upon first pkt received */
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if (urr->meas_info.istm) {
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upf_sess_urr_acc_timers_setup(sess, urr);
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}
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}
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}
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void upf_n4_handle_session_establishment_request(
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upf_sess_t *sess, ogs_pfcp_xact_t *xact,
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ogs_pfcp_session_establishment_request_t *req)
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{
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ogs_pfcp_pdr_t *pdr = NULL;
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ogs_pfcp_far_t *far = NULL;
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ogs_pfcp_pdr_t *created_pdr[OGS_MAX_NUM_OF_PDR];
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int num_of_created_pdr = 0;
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uint8_t cause_value = 0;
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uint8_t offending_ie_value = 0;
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int i;
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ogs_pfcp_sereq_flags_t sereq_flags;
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bool restoration_indication = false;
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upf_metrics_inst_global_inc(UPF_METR_GLOB_CTR_SM_N4SESSIONESTABREQ);
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ogs_assert(xact);
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ogs_assert(req);
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ogs_debug("Session Establishment Request");
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cause_value = OGS_PFCP_CAUSE_REQUEST_ACCEPTED;
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if (!sess) {
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ogs_error("No Context");
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ogs_pfcp_send_error_message(xact,
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OGS_PFCP_SEID_NO_PRESENCE, 0,
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OGS_PFCP_SESSION_ESTABLISHMENT_RESPONSE_TYPE,
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OGS_PFCP_CAUSE_MANDATORY_IE_MISSING, 0);
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upf_metrics_inst_by_cause_add(OGS_PFCP_CAUSE_MANDATORY_IE_MISSING,
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UPF_METR_CTR_SM_N4SESSIONESTABFAIL, 1);
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return;
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}
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memset(&sereq_flags, 0, sizeof(sereq_flags));
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if (req->pfcpsereq_flags.presence == 1)
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sereq_flags.value = req->pfcpsereq_flags.u8;
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for (i = 0; i < OGS_MAX_NUM_OF_PDR; i++) {
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created_pdr[i] = ogs_pfcp_handle_create_pdr(&sess->pfcp,
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&req->create_pdr[i], &sereq_flags,
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&cause_value, &offending_ie_value);
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if (created_pdr[i] == NULL)
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break;
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}
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num_of_created_pdr = i;
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_FAR; i++) {
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if (ogs_pfcp_handle_create_far(&sess->pfcp, &req->create_far[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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upf_n4_handle_create_urr(sess, &req->create_urr[0], &cause_value, &offending_ie_value);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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if (req->apn_dnn.presence) {
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char apn_dnn[OGS_MAX_DNN_LEN+1];
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ogs_assert(0 < ogs_fqdn_parse(apn_dnn, req->apn_dnn.data,
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ogs_min(req->apn_dnn.len, OGS_MAX_DNN_LEN)));
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if (sess->apn_dnn)
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ogs_free(sess->apn_dnn);
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sess->apn_dnn = ogs_strdup(apn_dnn);
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ogs_assert(sess->apn_dnn);
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}
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for (i = 0; i < OGS_MAX_NUM_OF_QER; i++) {
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if (ogs_pfcp_handle_create_qer(&sess->pfcp, &req->create_qer[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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upf_metrics_inst_by_dnn_add(sess->apn_dnn,
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UPF_METR_GAUGE_UPF_QOSFLOWS, 1);
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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ogs_pfcp_handle_create_bar(&sess->pfcp, &req->create_bar,
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&cause_value, &offending_ie_value);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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/* Setup GTP Node */
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ogs_list_for_each(&sess->pfcp.far_list, far) {
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if (OGS_ERROR == ogs_pfcp_setup_far_gtpu_node(far)) {
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ogs_fatal("CHECK CONFIGURATION: upf.gtpu");
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ogs_fatal("ogs_pfcp_setup_far_gtpu_node() failed");
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goto cleanup;
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}
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if (far->gnode)
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ogs_pfcp_far_f_teid_hash_set(far);
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}
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/* PFCPSEReq-Flags */
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if (sereq_flags.restoration_indication == 1) {
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for (i = 0; i < num_of_created_pdr; i++) {
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pdr = created_pdr[i];
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ogs_assert(pdr);
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if (pdr->f_teid_len)
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ogs_pfcp_pdr_swap_teid(pdr);
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}
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restoration_indication = true;
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}
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for (i = 0; i < num_of_created_pdr; i++) {
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pdr = created_pdr[i];
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ogs_assert(pdr);
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/* Setup UE IP address */
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if (pdr->ue_ip_addr_len) {
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if (req->pdn_type.presence == 1) {
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cause_value = upf_sess_set_ue_ip(sess, req->pdn_type.u8, pdr);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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} else {
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ogs_error("No PDN Type");
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}
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}
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if (pdr->ipv4_framed_routes) {
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cause_value =
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upf_sess_set_ue_ipv4_framed_routes(sess,
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pdr->ipv4_framed_routes);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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}
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if (pdr->ipv6_framed_routes) {
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cause_value =
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upf_sess_set_ue_ipv6_framed_routes(sess,
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pdr->ipv6_framed_routes);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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}
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/* Setup UPF-N3-TEID & QFI Hash */
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if (pdr->f_teid_len)
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ogs_pfcp_object_teid_hash_set(
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OGS_PFCP_OBJ_SESS_TYPE, pdr, restoration_indication);
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}
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/* Send Buffered Packet to gNB/SGW */
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ogs_list_for_each(&sess->pfcp.pdr_list, pdr) {
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if (pdr->src_if == OGS_PFCP_INTERFACE_CORE) { /* Downlink */
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ogs_pfcp_send_buffered_packet(pdr);
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}
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}
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if (restoration_indication == true ||
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ogs_pfcp_self()->up_function_features.ftup == 0)
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ogs_assert(OGS_OK ==
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upf_pfcp_send_session_establishment_response(
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xact, sess, NULL, 0));
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else
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ogs_assert(OGS_OK ==
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upf_pfcp_send_session_establishment_response(
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xact, sess, created_pdr, num_of_created_pdr));
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return;
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cleanup:
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upf_metrics_inst_by_cause_add(cause_value,
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UPF_METR_CTR_SM_N4SESSIONESTABFAIL, 1);
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ogs_pfcp_sess_clear(&sess->pfcp);
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ogs_pfcp_send_error_message(xact,
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sess ? OGS_PFCP_SEID_PRESENCE : OGS_PFCP_SEID_NO_PRESENCE,
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sess ? sess->smf_n4_f_seid.seid : 0,
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OGS_PFCP_SESSION_ESTABLISHMENT_RESPONSE_TYPE,
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cause_value, offending_ie_value);
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}
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void upf_n4_handle_session_modification_request(
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upf_sess_t *sess, ogs_pfcp_xact_t *xact,
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ogs_pfcp_session_modification_request_t *req)
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{
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ogs_pfcp_pdr_t *pdr = NULL;
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ogs_pfcp_far_t *far = NULL;
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ogs_pfcp_pdr_t *created_pdr[OGS_MAX_NUM_OF_PDR];
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int num_of_created_pdr = 0;
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uint8_t cause_value = 0;
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uint8_t offending_ie_value = 0;
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int i;
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ogs_assert(xact);
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ogs_assert(req);
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ogs_debug("Session Modification Request");
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cause_value = OGS_PFCP_CAUSE_REQUEST_ACCEPTED;
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if (!sess) {
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ogs_error("No Context");
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ogs_pfcp_send_error_message(xact,
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OGS_PFCP_SEID_NO_PRESENCE, 0,
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OGS_PFCP_SESSION_MODIFICATION_RESPONSE_TYPE,
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OGS_PFCP_CAUSE_SESSION_CONTEXT_NOT_FOUND, 0);
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return;
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}
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for (i = 0; i < OGS_MAX_NUM_OF_PDR; i++) {
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created_pdr[i] = ogs_pfcp_handle_create_pdr(&sess->pfcp,
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&req->create_pdr[i], NULL, &cause_value, &offending_ie_value);
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if (created_pdr[i] == NULL)
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break;
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}
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num_of_created_pdr = i;
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_PDR; i++) {
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if (ogs_pfcp_handle_update_pdr(&sess->pfcp, &req->update_pdr[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_PDR; i++) {
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if (ogs_pfcp_handle_remove_pdr(&sess->pfcp, &req->remove_pdr[i],
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&cause_value, &offending_ie_value) == false)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_FAR; i++) {
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if (ogs_pfcp_handle_create_far(&sess->pfcp, &req->create_far[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_FAR; i++) {
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if (ogs_pfcp_handle_update_far_flags(&sess->pfcp, &req->update_far[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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/* Send End Marker to gNB */
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ogs_list_for_each(&sess->pfcp.pdr_list, pdr) {
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if (pdr->src_if == OGS_PFCP_INTERFACE_CORE) { /* Downlink */
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far = pdr->far;
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if (far && far->smreq_flags.send_end_marker_packets)
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ogs_assert(OGS_ERROR != ogs_pfcp_send_end_marker(pdr));
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}
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}
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/* Clear PFCPSMReq-Flags */
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ogs_list_for_each(&sess->pfcp.far_list, far)
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far->smreq_flags.value = 0;
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for (i = 0; i < OGS_MAX_NUM_OF_FAR; i++) {
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if (ogs_pfcp_handle_update_far(&sess->pfcp, &req->update_far[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_FAR; i++) {
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if (ogs_pfcp_handle_remove_far(&sess->pfcp, &req->remove_far[i],
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&cause_value, &offending_ie_value) == false)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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upf_n4_handle_create_urr(sess, &req->create_urr[0], &cause_value, &offending_ie_value);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_URR; i++) {
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if (ogs_pfcp_handle_update_urr(&sess->pfcp, &req->update_urr[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_URR; i++) {
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if (ogs_pfcp_handle_remove_urr(&sess->pfcp, &req->remove_urr[i],
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&cause_value, &offending_ie_value) == false)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_QER; i++) {
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if (ogs_pfcp_handle_create_qer(&sess->pfcp, &req->create_qer[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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upf_metrics_inst_by_dnn_add(sess->apn_dnn,
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UPF_METR_GAUGE_UPF_QOSFLOWS, 1);
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_QER; i++) {
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if (ogs_pfcp_handle_update_qer(&sess->pfcp, &req->update_qer[i],
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&cause_value, &offending_ie_value) == NULL)
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break;
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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for (i = 0; i < OGS_MAX_NUM_OF_QER; i++) {
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if (ogs_pfcp_handle_remove_qer(&sess->pfcp, &req->remove_qer[i],
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&cause_value, &offending_ie_value) == false)
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break;
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upf_metrics_inst_by_dnn_add(sess->apn_dnn,
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UPF_METR_GAUGE_UPF_QOSFLOWS, -1);
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}
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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ogs_pfcp_handle_create_bar(&sess->pfcp, &req->create_bar,
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&cause_value, &offending_ie_value);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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ogs_pfcp_handle_remove_bar(&sess->pfcp, &req->remove_bar,
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&cause_value, &offending_ie_value);
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if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED)
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goto cleanup;
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/* Setup GTP Node */
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ogs_list_for_each(&sess->pfcp.far_list, far) {
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if (OGS_ERROR == ogs_pfcp_setup_far_gtpu_node(far)) {
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ogs_fatal("CHECK CONFIGURATION: upf.gtpu");
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ogs_fatal("ogs_pfcp_setup_far_gtpu_node() failed");
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goto cleanup;
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}
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if (far->gnode)
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ogs_pfcp_far_f_teid_hash_set(far);
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}
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for (i = 0; i < num_of_created_pdr; i++) {
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pdr = created_pdr[i];
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ogs_assert(pdr);
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/* Setup UPF-N3-TEID & QFI Hash */
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if (pdr->f_teid_len)
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ogs_pfcp_object_teid_hash_set(OGS_PFCP_OBJ_SESS_TYPE, pdr, false);
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}
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/* Send Buffered Packet to gNB/SGW */
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ogs_list_for_each(&sess->pfcp.pdr_list, pdr) {
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if (pdr->src_if == OGS_PFCP_INTERFACE_CORE) { /* Downlink */
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ogs_pfcp_send_buffered_packet(pdr);
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}
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}
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if (ogs_pfcp_self()->up_function_features.ftup == 0)
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ogs_assert(OGS_OK ==
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upf_pfcp_send_session_modification_response(
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xact, sess, NULL, 0));
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else
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ogs_assert(OGS_OK ==
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upf_pfcp_send_session_modification_response(
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xact, sess, created_pdr, num_of_created_pdr));
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return;
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cleanup:
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ogs_pfcp_sess_clear(&sess->pfcp);
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ogs_pfcp_send_error_message(xact,
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sess ? OGS_PFCP_SEID_PRESENCE : OGS_PFCP_SEID_NO_PRESENCE,
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sess ? sess->smf_n4_f_seid.seid : 0,
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OGS_PFCP_SESSION_MODIFICATION_RESPONSE_TYPE,
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cause_value, offending_ie_value);
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}
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void upf_n4_handle_session_deletion_request(
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upf_sess_t *sess, ogs_pfcp_xact_t *xact,
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ogs_pfcp_session_deletion_request_t *req)
|
|
{
|
|
ogs_pfcp_qer_t *qer = NULL;
|
|
|
|
ogs_assert(xact);
|
|
ogs_assert(req);
|
|
|
|
ogs_debug("Session Deletion Request");
|
|
|
|
if (!sess) {
|
|
ogs_error("No Context");
|
|
ogs_pfcp_send_error_message(xact,
|
|
OGS_PFCP_SEID_NO_PRESENCE, 0,
|
|
OGS_PFCP_SESSION_DELETION_RESPONSE_TYPE,
|
|
OGS_PFCP_CAUSE_SESSION_CONTEXT_NOT_FOUND, 0);
|
|
return;
|
|
}
|
|
upf_pfcp_send_session_deletion_response(xact, sess);
|
|
|
|
ogs_list_for_each(&sess->pfcp.qer_list, qer) {
|
|
upf_metrics_inst_by_dnn_add(sess->apn_dnn,
|
|
UPF_METR_GAUGE_UPF_QOSFLOWS, -1);
|
|
}
|
|
upf_sess_remove(sess);
|
|
}
|
|
|
|
void upf_n4_handle_session_report_response(
|
|
upf_sess_t *sess, ogs_pfcp_xact_t *xact,
|
|
ogs_pfcp_session_report_response_t *rsp)
|
|
{
|
|
uint8_t cause_value = 0;
|
|
|
|
ogs_assert(xact);
|
|
ogs_assert(rsp);
|
|
|
|
ogs_pfcp_xact_commit(xact);
|
|
|
|
ogs_debug("Session Report Response");
|
|
|
|
cause_value = OGS_PFCP_CAUSE_REQUEST_ACCEPTED;
|
|
|
|
if (!sess) {
|
|
ogs_warn("No Context");
|
|
cause_value = OGS_PFCP_CAUSE_SESSION_CONTEXT_NOT_FOUND;
|
|
}
|
|
|
|
if (rsp->cause.presence) {
|
|
if (rsp->cause.u8 != OGS_PFCP_CAUSE_REQUEST_ACCEPTED) {
|
|
ogs_error("PFCP Cause[%d] : Not Accepted", rsp->cause.u8);
|
|
cause_value = rsp->cause.u8;
|
|
}
|
|
} else {
|
|
ogs_error("No Cause");
|
|
cause_value = OGS_PFCP_CAUSE_MANDATORY_IE_MISSING;
|
|
}
|
|
|
|
if (cause_value != OGS_PFCP_CAUSE_REQUEST_ACCEPTED) {
|
|
ogs_error("Cause request not accepted[%d]", cause_value);
|
|
return;
|
|
} else {
|
|
upf_metrics_inst_global_inc(UPF_METR_GLOB_CTR_SM_N4SESSIONREPORTSUCC);
|
|
}
|
|
|
|
}
|