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/* TS 29.060 § 7.5.14 RAN Information Management Messages */
/*
* (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* All Rights Reserved
*
* SPDX-License-Identifier: AGPL-3.0+
*
* Author: Pau Espin Pedrol <pespin@sysmocom.de>
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <talloc.h>
#include <osmocom/sgsn/gtp_mme.h>
#include <osmocom/sgsn/sgsn.h>
static bool _eutran_tai_equal(const struct osmo_eutran_tai *t1, const struct osmo_eutran_tai *t2)
{
return t1->mcc == t2->mcc &&
t1->mnc == t2->mnc &&
t1->mnc_3_digits == t2->mnc_3_digits &&
t1->tac == t2->tac;
}
struct sgsn_mme_ctx *sgsn_mme_ctx_alloc(struct sgsn_instance *sgsn, const char *name)
{
struct sgsn_mme_ctx *mme;
mme = talloc_zero(sgsn, struct sgsn_mme_ctx);
if (!mme)
return NULL;
/* if we are called from config file parse, this gsn doesn't exist yet */
mme->sgsn = sgsn;
mme->name = talloc_strdup(mme, name);
INIT_LLIST_HEAD(&mme->routes);
llist_add_tail(&mme->list, &sgsn->mme_list);
return mme;
}
void sgsn_mme_ctx_free(struct sgsn_mme_ctx *mme)
{
struct mme_rim_route *rt, *rt2;
llist_del(&mme->list);
llist_for_each_entry_safe(rt, rt2, &mme->routes, list) {
llist_del(&rt->list);
talloc_free(rt);
}
talloc_free(mme);
}
struct sgsn_mme_ctx *sgsn_mme_ctx_find_alloc(struct sgsn_instance *sgsn, const char *name)
{
struct sgsn_mme_ctx *mme;
mme = sgsn_mme_ctx_by_name(sgsn, name);
if (!mme)
mme = sgsn_mme_ctx_alloc(sgsn, name);
return mme;
}
void sgsn_mme_ctx_route_add(struct sgsn_mme_ctx *mme, const struct osmo_eutran_tai *tai)
{
struct mme_rim_route *rt = talloc_zero(mme, struct mme_rim_route);
rt->tai = *tai;
llist_add_tail(&rt->list, &mme->routes);
}
void sgsn_mme_ctx_route_del(struct sgsn_mme_ctx *mme, const struct osmo_eutran_tai *tai)
{
struct mme_rim_route *rt;
llist_for_each_entry(rt, &mme->routes, list) {
if (_eutran_tai_equal(tai, &rt->tai)) {
llist_del(&rt->list);
talloc_free(rt);
return;
}
}
}
struct sgsn_mme_ctx *sgsn_mme_ctx_by_name(const struct sgsn_instance *sgsn, const char *name)
{
struct sgsn_mme_ctx *mme;
llist_for_each_entry(mme, &sgsn->mme_list, list) {
if (!strcmp(name, mme->name))
return mme;
}
return NULL;
}
struct sgsn_mme_ctx *sgsn_mme_ctx_by_addr(const struct sgsn_instance *sgsn, const struct in_addr *addr)
{
struct sgsn_mme_ctx *mme;
llist_for_each_entry(mme, &sgsn->mme_list, list) {
if (!memcmp(addr, &mme->remote_addr, sizeof(*addr)))
return mme;
}
return NULL;
}
struct sgsn_mme_ctx *sgsn_mme_ctx_by_route(const struct sgsn_instance *sgsn, const struct osmo_eutran_tai *tai)
{
struct sgsn_mme_ctx *mme;
llist_for_each_entry(mme, &sgsn->mme_list, list) {
struct mme_rim_route *rt;
llist_for_each_entry(rt, &mme->routes, list) {
if (_eutran_tai_equal(tai, &rt->tai)) {
return mme;
}
}
}
return NULL;
}
struct sgsn_mme_ctx *sgsn_mme_ctx_by_default_route(const struct sgsn_instance *sgsn)
{
struct sgsn_mme_ctx *mme;
llist_for_each_entry(mme, &sgsn->mme_list, list) {
if (mme->default_route)
return mme;
}
return NULL;
}
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