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/* Gy Interface, 3GPP TS 32.299
* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
* Copyright (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "context.h"
#include "gtp-path.h"
#include "pfcp-path.h"
#include "gy-handler.h"
#include "binding.h"
static void urr_update_volume(smf_sess_t *sess, ogs_pfcp_urr_t *urr, ogs_diam_gy_message_t *gy_message)
{
if (gy_message->cca.granted.cc_total_octets_present || gy_message->cca.volume_threshold) {
urr->meas_method |= OGS_PFCP_MEASUREMENT_METHOD_VOLUME;
ogs_assert(sess->pfcp_node);
if (sess->pfcp_node->up_function_features.mnop)
urr->meas_info.mnop = 1;
} else {
urr->meas_method &= ~OGS_PFCP_MEASUREMENT_METHOD_VOLUME;
}
/* Volume Quota */
if (gy_message->cca.granted.cc_total_octets_present) {
ogs_debug("Adding Volume Quota total_octets=%" PRIu64, gy_message->cca.granted.cc_total_octets);
urr->rep_triggers.volume_quota = 1;
urr->vol_quota.tovol = 1;
urr->vol_quota.total_volume = gy_message->cca.granted.cc_total_octets;
} else {
urr->rep_triggers.volume_quota = 0;
urr->vol_quota.tovol = 0;
urr->vol_quota.total_volume = 0;
}
/* Volume Threshold, requires Volume Quota for calculations */
if (gy_message->cca.volume_threshold &&
gy_message->cca.granted.cc_total_octets >= gy_message->cca.volume_threshold) {
ogs_debug("Adding Volume Threshold total_octets=%" PRIu32, gy_message->cca.volume_threshold);
urr->rep_triggers.volume_threshold = 1;
urr->vol_threshold.tovol = 1;
urr->vol_threshold.total_volume = (gy_message->cca.granted.cc_total_octets -
gy_message->cca.volume_threshold);
} else {
urr->rep_triggers.volume_threshold = 0;
urr->vol_threshold.tovol = 0;
urr->vol_threshold.total_volume = 0;
}
}
static void urr_update_time(smf_sess_t *sess, ogs_pfcp_urr_t *urr, ogs_diam_gy_message_t *gy_message)
{
uint32_t time_quota;
if (sess->pfcp_node->up_function_features.vtime) {
if (gy_message->cca.validity_time > 0) {
urr->rep_triggers.quota_validity_time = 1;
urr->quota_validity_time = gy_message->cca.validity_time;
} else {
urr->rep_triggers.quota_validity_time = 0;
urr->quota_validity_time = 0;
}
time_quota = gy_message->cca.granted.cc_time_present ? gy_message->cca.granted.cc_time : 0;
} else {
/* Store Validity Time as Volume Quota (if not longer than Volume Quota) */
if (gy_message->cca.validity_time && (gy_message->cca.granted.cc_time_present && gy_message->cca.granted.cc_time > 0))
time_quota = (gy_message->cca.validity_time <= gy_message->cca.granted.cc_time) ?
gy_message->cca.validity_time : gy_message->cca.granted.cc_time;
else if (gy_message->cca.validity_time)
time_quota = gy_message->cca.validity_time;
else if (gy_message->cca.granted.cc_time_present && gy_message->cca.granted.cc_time > 0)
time_quota = gy_message->cca.granted.cc_time;
else
time_quota = 0;
}
if (gy_message->cca.validity_time || time_quota || gy_message->cca.time_threshold) {
urr->meas_method |= OGS_PFCP_MEASUREMENT_METHOD_DURATION;
urr->meas_info.istm = 1;
} else {
urr->meas_info.istm = 0;
urr->meas_method &= ~OGS_PFCP_MEASUREMENT_METHOD_DURATION;
}
/* Time Quota */
if (time_quota) {
ogs_debug("Adding Time Quota secs=%" PRIu32, time_quota);
urr->rep_triggers.time_quota = 1;
urr->time_quota = time_quota;
} else {
urr->rep_triggers.time_quota = 0;
urr->time_quota = 0;
}
/* Time Threshold, requires Time Quota for calculations */
if (gy_message->cca.time_threshold &&
time_quota >= gy_message->cca.time_threshold) {
ogs_debug("Adding Time Threshold secs=%" PRIu32, gy_message->cca.time_threshold);
urr->rep_triggers.time_threshold = 1;
urr->time_threshold = (time_quota - gy_message->cca.time_threshold);
} else {
urr->rep_triggers.time_threshold = 0;
urr->time_threshold = 0;
}
}
/* Returns ER_DIAMETER_SUCCESS on success, Diameter error code on failue.
* Upon failure, CCR-Terminate is needed based on "need_termination" value (this
* may happen eg. if messaged RC is successful but MSCC RC is rejected). */
uint32_t smf_gy_handle_cca_initial_request(
smf_sess_t *sess, ogs_diam_gy_message_t *gy_message,
ogs_gtp_xact_t *gtp_xact,
bool *need_termination)
{
smf_bearer_t *bearer;
ogs_assert(sess);
ogs_assert(gy_message);
ogs_assert(gtp_xact);
ogs_assert(need_termination);
ogs_debug("[Gy CCA Initial]");
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
sess->sgw_s5c_teid, sess->smf_n4_teid);
*need_termination = false;
if (gy_message->result_code != ER_DIAMETER_SUCCESS) {
ogs_warn("Gy CCA Initial Diameter failure: res=%u",
gy_message->result_code);
return gy_message->err ? *gy_message->err :
ER_DIAMETER_AUTHENTICATION_REJECTED;
}
if (gy_message->cca.result_code != ER_DIAMETER_SUCCESS) {
ogs_warn("Gy CCA Initial Diameter Multiple-Services-Credit-Control Result-Code=%u",
gy_message->cca.result_code);
/* Message RC was successful but MSCC was rejected. The session needs to
* be tear down through CCR-T: */
*need_termination = true;
return gy_message->cca.err ? *gy_message->cca.err :
ER_DIAMETER_AUTHENTICATION_REJECTED;
}
bearer = smf_default_bearer_in_sess(sess);
ogs_assert(bearer);
if (!bearer->urr)
bearer->urr = ogs_pfcp_urr_add(&sess->pfcp);
ogs_assert(bearer->urr);
/* Configure based on what we received from OCS: */
urr_update_time(sess, bearer->urr, gy_message);
urr_update_volume(sess, bearer->urr, gy_message);
sess->gy.final_unit = gy_message->cca.final.cc_final_action_present;
/* Associate acconting URR each direction PDR: */
ogs_pfcp_pdr_associate_urr(bearer->ul_pdr, bearer->urr);
ogs_pfcp_pdr_associate_urr(bearer->dl_pdr, bearer->urr);
return ER_DIAMETER_SUCCESS;
}
uint32_t smf_gy_handle_cca_update_request(
smf_sess_t *sess, ogs_diam_gy_message_t *gy_message,
ogs_pfcp_xact_t *pfcp_xact)
{
ogs_pfcp_urr_t *urr = NULL;
smf_bearer_t *bearer;
int rv;
uint64_t modify_flags = 0;
ogs_pfcp_measurement_method_t prev_meas_method;
ogs_pfcp_reporting_triggers_t prev_rep_triggers;
ogs_pfcp_quota_validity_time_t prev_quota_validity_time;
ogs_pfcp_time_quota_t prev_time_quota;
ogs_pfcp_volume_threshold_t prev_vol_threshold;
ogs_pfcp_time_threshold_t prev_time_threshold;
ogs_assert(sess);
ogs_assert(gy_message);
ogs_assert(pfcp_xact);
ogs_debug("[Gy CCA Update]");
ogs_debug(" SGW_S5C_TEID[0x%x] PGW_S5C_TEID[0x%x]",
sess->sgw_s5c_teid, sess->smf_n4_teid);
if (gy_message->result_code != ER_DIAMETER_SUCCESS) {
ogs_warn("Gy CCA Update Diameter failure: Result-Code=%u",
gy_message->result_code);
return gy_message->err ? *gy_message->err :
ER_DIAMETER_AUTHENTICATION_REJECTED;
}
if (gy_message->cca.result_code != ER_DIAMETER_SUCCESS) {
ogs_warn("Gy CCA Update Diameter Multiple-Services-Credit-Control Result-Code=%u",
gy_message->cca.result_code);
return gy_message->cca.err ? *gy_message->cca.err :
ER_DIAMETER_AUTHENTICATION_REJECTED;
}
bearer = smf_default_bearer_in_sess(sess);
ogs_assert(bearer);
urr = bearer->urr;
ogs_assert(urr);
prev_meas_method = urr->meas_method;
prev_rep_triggers = urr->rep_triggers;
prev_quota_validity_time = urr->quota_validity_time;
prev_time_quota = urr->time_quota;
prev_vol_threshold = urr->vol_threshold;
prev_time_threshold = urr->time_threshold;
urr_update_time(sess, urr, gy_message);
urr_update_volume(sess, urr, gy_message);
sess->gy.final_unit = gy_message->cca.final.cc_final_action_present;
/* Associate accounting URR each direction PDR: */
ogs_pfcp_pdr_associate_urr(bearer->ul_pdr, urr);
ogs_pfcp_pdr_associate_urr(bearer->dl_pdr, urr);
if (urr->meas_method != prev_meas_method)
modify_flags |= OGS_PFCP_MODIFY_URR_MEAS_METHOD;
if (urr->rep_triggers.quota_validity_time != prev_rep_triggers.quota_validity_time ||
urr->rep_triggers.time_quota != prev_rep_triggers.time_quota ||
urr->rep_triggers.volume_quota != prev_rep_triggers.volume_quota ||
urr->rep_triggers.time_threshold != prev_rep_triggers.time_threshold ||
urr->rep_triggers.volume_threshold != prev_rep_triggers.volume_threshold)
modify_flags |= OGS_PFCP_MODIFY_URR_REPORT_TRIGGER;
if (urr->quota_validity_time != prev_quota_validity_time)
modify_flags |= OGS_PFCP_MODIFY_URR_QUOTA_VALIDITY_TIME;
if (urr->time_quota != prev_time_quota)
modify_flags |= OGS_PFCP_MODIFY_URR_TIME_QUOTA;
if (urr->vol_quota.tovol || urr->vol_quota.total_volume)
modify_flags |= OGS_PFCP_MODIFY_URR_VOLUME_QUOTA;
if (urr->time_threshold != prev_time_threshold)
modify_flags |= OGS_PFCP_MODIFY_URR_TIME_THRESH;
if (urr->vol_threshold.tovol != prev_vol_threshold.tovol ||
urr->vol_threshold.total_volume != prev_vol_threshold.total_volume)
modify_flags |= OGS_PFCP_MODIFY_URR_VOLUME_THRESH;
/* Send PFCP Session Modification Request if we need to update the params. */
if (modify_flags) {
modify_flags |= OGS_PFCP_MODIFY_URR|OGS_PFCP_MODIFY_UL_ONLY;
rv = smf_epc_pfcp_send_all_pdr_modification_request(
sess, OGS_INVALID_POOL_ID, NULL, modify_flags,
OGS_NAS_PROCEDURE_TRANSACTION_IDENTITY_UNASSIGNED,
OGS_GTP1_CAUSE_REACTIACTION_REQUESTED);
ogs_assert(rv == OGS_OK);
}
return ER_DIAMETER_SUCCESS;
}
uint32_t smf_gy_handle_cca_termination_request(
smf_sess_t *sess, ogs_diam_gy_message_t *gy_message,
ogs_gtp_xact_t *gtp_xact)
{
ogs_assert(sess);
ogs_assert(gy_message);
ogs_debug("[SMF] Delete Session Response");
ogs_debug(" SGW_S5C_TEID[0x%x] SMF_N4_TEID[0x%x]",
sess->sgw_s5c_teid, sess->smf_n4_teid);
return ER_DIAMETER_SUCCESS;
}
void smf_gy_handle_re_auth_request(
smf_sess_t *sess, ogs_diam_gy_message_t *gy_message)
{
/* TODO: find out what to do here */
}
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