111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/* Osmocom CBC (Cell Broacast Centre) */
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/* (C) 2019 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* SPDX-License-Identifier: AGPL-3.0+
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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 Affero General Public License as published by
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* the Free Software Foundation; either version 3 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <errno.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/gsm/cbsp.h>
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#include <osmocom/cbc/cbsp_msg.h>
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#include <osmocom/cbc/cbc_message.h>
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/* convert cbc_message to osmo_cbsp_cell_list */
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static int cbcmsg_to_cbsp_cell_list(const void *ctx, struct osmo_cbsp_cell_list *list,
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const struct cbc_message *cbcmsg)
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{
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struct osmo_cbsp_cell_ent *ent;
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switch (cbcmsg->scope) {
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case CBC_MSG_SCOPE_PLMN:
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list->id_discr = CELL_IDENT_BSS;
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ent = talloc_zero(ctx, struct osmo_cbsp_cell_ent);
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if (!ent)
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return -ENOMEM;
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//ent->cell_id = ?
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llist_add_tail(&ent->list, &list->list);
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return 0;
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default:
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OSMO_ASSERT(0);
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}
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}
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/* generate a CBSP WRITE-REPLACE from our internal representation */
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struct osmo_cbsp_decoded *cbsp_gen_write_replace_req(void *ctx, const struct cbc_message *cbcmsg)
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{
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struct osmo_cbsp_write_replace *wrepl;
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const struct smscb_message *smscb = &cbcmsg->msg;
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struct osmo_cbsp_decoded *cbsp = osmo_cbsp_decoded_alloc(ctx, CBSP_MSGT_WRITE_REPLACE);
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unsigned int i;
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int rc;
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if (!cbsp)
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return NULL;
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wrepl = &cbsp->u.write_replace;
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wrepl->msg_id = smscb->message_id;
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wrepl->new_serial_nr = smscb->serial_nr;
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/* FIXME: old? */
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/* Cell list */
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rc = cbcmsg_to_cbsp_cell_list(cbcmsg, &wrepl->cell_list, cbcmsg);
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if (rc < 0) {
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talloc_free(cbsp);
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return NULL;
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}
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if (!smscb->is_etws)
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wrepl->is_cbs = true;
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if (wrepl->is_cbs) {
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if (cbcmsg->extended_cbch)
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wrepl->u.cbs.channel_ind = CBSP_CHAN_IND_EXTENDED;
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else
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wrepl->u.cbs.channel_ind = CBSP_CHAN_IND_BASIC;
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wrepl->u.cbs.category = cbcmsg->priority;
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wrepl->u.cbs.rep_period = cbcmsg->rep_period;
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wrepl->u.cbs.num_bcast_req = cbcmsg->num_bcast;
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wrepl->u.cbs.dcs = smscb->cbs.dcs;
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INIT_LLIST_HEAD(&wrepl->u.cbs.msg_content);
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for (i = 0; i < smscb->cbs.num_pages; i++) {
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struct osmo_cbsp_content *ce = talloc_zero(cbsp, struct osmo_cbsp_content);
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if (i == smscb->cbs.num_pages - 1)
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ce->user_len = smscb->cbs.data_user_len - (i * SMSCB_RAW_PAGE_LEN);
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else
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ce->user_len = SMSCB_RAW_PAGE_LEN;
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memcpy(ce->data, smscb->cbs.data[i], SMSCB_RAW_PAGE_LEN);
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llist_add_tail(&ce->list, &wrepl->u.cbs.msg_content);
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}
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} else {
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wrepl->u.emergency.indicator = 1;
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wrepl->u.emergency.warning_type = (smscb->etws.warning_type & 0x7f) << 9;
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if (smscb->etws.user_alert)
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wrepl->u.emergency.warning_type |= 0x0100;
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if (smscb->etws.popup_on_display)
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wrepl->u.emergency.warning_type |= 0x0080;
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memcpy(wrepl->u.emergency.warning_sec_info, smscb->etws.warning_sec_info,
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sizeof(wrepl->u.emergency.warning_sec_info));
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if (cbcmsg->warning_period_sec == 0xffffffff)
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wrepl->u.emergency.warning_period = 0;
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else
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wrepl->u.emergency.warning_period = cbcmsg->warning_period_sec;
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}
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return cbsp;
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}
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