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/*
* L23SAP (L2&3 Service Access Point), an interface between
* L1 implementation and the upper layers (i.e. L2&3).
*
* (C) 2011 by Harald Welte <laforge@gnumonks.org>
* (C) 2018 by Vadim Yanitskiy <axilirator@gmail.com>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <errno.h>
#include <stdint.h>
#include <string.h>
#include <arpa/inet.h>
#include <l1ctl_proto.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/prim.h>
#include <osmocom/core/msgb.h>
#include <osmocom/gsm/lapdm.h>
#include <osmocom/bb/common/osmocom_data.h>
#include <osmocom/bb/common/logging.h>
#include <osmocom/bb/common/l23sap.h>
int l23sap_data_ind(struct osmocom_ms *ms, struct msgb *msg)
{
struct l1ctl_info_dl *dl = (struct l1ctl_info_dl *) msg->l1h;
struct osmo_phsap_prim pp;
struct lapdm_entity *le;
/* Init a new DATA IND primitive */
osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_DATA,
PRIM_OP_INDICATION, msg);
pp.u.data.chan_nr = dl->chan_nr;
pp.u.data.link_id = dl->link_id;
/* Determine LAPDm entity based on SACCH or not */
if (CHAN_IS_SACCH(dl->link_id))
le = &ms->lapdm_channel.lapdm_acch;
else
le = &ms->lapdm_channel.lapdm_dcch;
/* Send it up into LAPDm */
return lapdm_phsap_up(&pp.oph, le);
}
int l23sap_data_conf(struct osmocom_ms *ms, struct msgb *msg)
{
struct l1ctl_info_dl *dl = (struct l1ctl_info_dl *) msg->l1h;
struct osmo_phsap_prim pp;
struct lapdm_entity *le;
osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_RTS,
PRIM_OP_INDICATION, msg);
/* Determine LAPDm entity based on SACCH or not */
if (CHAN_IS_SACCH(dl->link_id))
le = &ms->lapdm_channel.lapdm_acch;
else
le = &ms->lapdm_channel.lapdm_dcch;
/* Send it up into LAPDm */
return lapdm_phsap_up(&pp.oph, le);
}
int l23sap_rach_conf(struct osmocom_ms *ms, struct msgb *msg)
{
struct l1ctl_info_dl *dl = (struct l1ctl_info_dl *) msg->l1h;
struct osmo_phsap_prim pp;
osmo_prim_init(&pp.oph, SAP_GSM_PH, PRIM_PH_RACH,
PRIM_OP_CONFIRM, msg);
pp.u.rach_ind.fn = ntohl(dl->frame_nr);
/* TODO: do we really need this? */
msg->l2h = msg->l3h = dl->payload;
/* Send it up into LAPDm */
return lapdm_phsap_up(&pp.oph,
&ms->lapdm_channel.lapdm_dcch);
}
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