diff options
Diffstat (limited to 'src/host/layer23/src/common/l23sap.c')
| -rw-r--r-- | src/host/layer23/src/common/l23sap.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/host/layer23/src/common/l23sap.c b/src/host/layer23/src/common/l23sap.c new file mode 100644 index 00000000..b07265ac --- /dev/null +++ b/src/host/layer23/src/common/l23sap.c @@ -0,0 +1,98 @@ +/* + * 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); +} |