206 lines
4.2 KiB
C
206 lines
4.2 KiB
C
/*
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* Copyright (C) 2023 sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Alexander Couzens <acouzens@sysmocom.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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 General Public License as published by
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* the Free Software Foundation; either version 2 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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*/
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#include <errno.h>
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#include <sa/ike_sa.h>
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#include <threading/rwlock.h>
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#include <utils/utils.h>
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#include <utils/debug.h>
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#include "osmo_epdg_ue.h"
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#include "osmo_epdg_utils.h"
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typedef struct private_osmo_epdg_ue_t private_osmo_epdg_ue_t;
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/**
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* Private data of an osmo_epdg_ue_t object.
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*/
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struct private_osmo_epdg_ue_t {
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/**
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* Public osmo_epdg_ue_t interface.
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*/
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osmo_epdg_ue_t public;
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/**
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* a unique id.
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* Same as ike_sa_t->get_unique_id().
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*/
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uint32_t id;
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/**
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* IMSI encoded as character
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*/
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char *imsi;
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/**
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* APN encoded as character (foo.example)
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*/
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char *apn;
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/**
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* IP address of the client. Might become a llist_t in the future
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*/
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host_t *address;
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/**
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* Refcount to track this object.
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* It will call destroy() when refcount reaches 0
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*/
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refcount_t refcount;
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/**
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* rwlock to lock access for changes
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*/
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rwlock_t *lock;
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enum osmo_epdg_ue_state state;
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};
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METHOD(osmo_epdg_ue_t, get_imsi, const char *,
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private_osmo_epdg_ue_t *this)
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{
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return this->imsi;
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}
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METHOD(osmo_epdg_ue_t, get_apn, const char *,
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private_osmo_epdg_ue_t *this)
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{
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return this->apn;
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}
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METHOD(osmo_epdg_ue_t, get_id, uint32_t,
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private_osmo_epdg_ue_t *this)
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{
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return this->id;
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}
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METHOD(osmo_epdg_ue_t, set_id, void,
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private_osmo_epdg_ue_t *this, uint32_t unique_id)
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{
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this->id = unique_id;
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}
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METHOD(osmo_epdg_ue_t, set_address, void,
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private_osmo_epdg_ue_t *this, host_t *address)
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{
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this->lock->write_lock(this->lock);
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if (this->address)
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{
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this->address->destroy(this->address);
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}
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this->address = address->clone(address);
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this->lock->unlock(this->lock);
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}
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METHOD(osmo_epdg_ue_t, get_address, host_t *,
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private_osmo_epdg_ue_t *this)
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{
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host_t *address = NULL;
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this->lock->read_lock(this->lock);
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if (this->address)
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{
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address = this->address->clone(this->address);
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}
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this->lock->unlock(this->lock);
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return address;
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}
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METHOD(osmo_epdg_ue_t, set_state, void,
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private_osmo_epdg_ue_t *this, enum osmo_epdg_ue_state state)
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{
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this->lock->write_lock(this->lock);
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/* TODO: implement a FSM. At least we can get debug information out of it. */
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this->state = state;
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this->lock->unlock(this->lock);
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}
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METHOD(osmo_epdg_ue_t, get_state, enum osmo_epdg_ue_state,
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private_osmo_epdg_ue_t *this)
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{
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enum osmo_epdg_ue_state state;
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this->lock->read_lock(this->lock);
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/* TODO: implement a FSM. At least we can get debug information out of it. */
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state = this->state;
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this->lock->unlock(this->lock);
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return state;
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}
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METHOD(osmo_epdg_ue_t, get, void,
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private_osmo_epdg_ue_t *this)
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{
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ref_get(&this->refcount);
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}
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METHOD(osmo_epdg_ue_t, put, void,
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private_osmo_epdg_ue_t *this)
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{
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if (ref_put(&this->refcount))
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{
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this->public.destroy(&this->public);
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}
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}
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METHOD(osmo_epdg_ue_t, destroy, void,
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private_osmo_epdg_ue_t *this)
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{
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this->lock->destroy(this->lock);
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free(this->apn);
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free(this->imsi);
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free(this);
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}
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osmo_epdg_ue_t *osmo_epdg_ue_create(uint32_t id, const char *imsi, const char *apn)
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{
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private_osmo_epdg_ue_t *this;
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if (epdg_validate_apn(apn) ||
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epdg_validate_imsi(imsi))
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{
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return NULL;
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}
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INIT(this,
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.public = {
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.get = _get,
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.put = _put,
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.get_apn = _get_apn,
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.get_imsi = _get_imsi,
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.get_id = _get_id,
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.set_id = _set_id,
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.get_address = _get_address,
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.set_address = _set_address,
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.get_state = _get_state,
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.set_state = _set_state,
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.destroy = _destroy,
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},
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.apn = strdup(apn),
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.imsi = strdup(imsi),
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.id = id,
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.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
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.state = UE_WAIT_LOCATION_UPDATE,
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.refcount = 1,
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);
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return &this->public;
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}
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