155 lines
4.2 KiB
C
155 lines
4.2 KiB
C
/* Code used by both libbsc and libmsc (common_cs means "BSC or MSC").
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*
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* (C) 2016 by sysmocom s.m.f.c. <info@sysmocom.de>
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* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2014 by Holger Hans Peter Freyther
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* All Rights Reserved
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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 <stdbool.h>
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#include <osmocom/gsm/gsm0480.h>
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#include <openbsc/common_cs.h>
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#include <openbsc/gsm_data.h>
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#include <openbsc/gsm_subscriber.h>
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#include <openbsc/gsm_data.h>
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#include <openbsc/gsm_04_11.h>
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/* Warning: if bsc_network_init() is not called, some of the members of
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* gsm_network are not initialized properly and must not be used! (In
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* particular the llist heads and stats counters.)
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* The long term aim should be to have entirely separate structs for libbsc and
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* libmsc with some common general items.
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*/
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struct gsm_network *gsm_network_init(void *ctx,
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uint16_t country_code,
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uint16_t network_code,
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mncc_recv_cb_t mncc_recv)
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{
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struct gsm_network *net;
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const char *default_regexp = ".*";
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net = talloc_zero(ctx, struct gsm_network);
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if (!net)
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return NULL;
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if (gsm_parse_reg(net, &net->authorized_regexp, &net->authorized_reg_str, 1,
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&default_regexp) != 0)
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return NULL;
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net->country_code = country_code;
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net->network_code = network_code;
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/* Use 30 min periodic update interval as sane default */
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net->t3212 = 5;
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INIT_LLIST_HEAD(&net->trans_list);
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INIT_LLIST_HEAD(&net->upqueue);
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INIT_LLIST_HEAD(&net->subscr_conns);
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net->bsc_subscribers = talloc_zero(net, struct llist_head);
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INIT_LLIST_HEAD(net->bsc_subscribers);
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/* init statistics */
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net->msc_ctrs = rate_ctr_group_alloc(net, &msc_ctrg_desc, 0);
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if (!net->msc_ctrs) {
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talloc_free(net);
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return NULL;
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}
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net->active_calls = osmo_counter_alloc("msc.active_calls");
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net->mncc_recv = mncc_recv;
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net->dyn_ts_allow_tch_f = true;
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INIT_LLIST_HEAD(&net->a.bscs);
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return net;
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}
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struct msgb *gsm48_create_mm_serv_rej(enum gsm48_reject_value value)
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{
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struct msgb *msg;
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struct gsm48_hdr *gh;
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msg = gsm48_msgb_alloc_name("GSM 04.08 SERV REJ");
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if (!msg)
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return NULL;
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gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
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gh->proto_discr = GSM48_PDISC_MM;
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gh->msg_type = GSM48_MT_MM_CM_SERV_REJ;
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gh->data[0] = value;
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return msg;
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}
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struct msgb *gsm48_create_loc_upd_rej(uint8_t cause)
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{
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struct gsm48_hdr *gh;
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struct msgb *msg;
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msg = gsm48_msgb_alloc_name("GSM 04.08 LOC UPD REJ");
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if (!msg)
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return NULL;
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gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1);
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gh->proto_discr = GSM48_PDISC_MM;
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gh->msg_type = GSM48_MT_MM_LOC_UPD_REJECT;
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gh->data[0] = cause;
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return msg;
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}
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int gsm48_extract_mi(uint8_t *classmark2_lv, int length, char *mi_string, uint8_t *mi_type)
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{
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/* Check the size for the classmark */
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if (length < 1 + *classmark2_lv)
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return -1;
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uint8_t *mi_lv = classmark2_lv + *classmark2_lv + 1;
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if (length < 2 + *classmark2_lv + mi_lv[0])
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return -2;
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*mi_type = mi_lv[1] & GSM_MI_TYPE_MASK;
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return gsm48_mi_to_string(mi_string, GSM48_MI_SIZE, mi_lv+1, *mi_lv);
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}
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int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length,
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char *mi_string, uint8_t *mi_type)
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{
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static const uint32_t classmark_offset =
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offsetof(struct gsm48_pag_resp, classmark2);
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uint8_t *classmark2_lv = (uint8_t *) &resp->classmark2;
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return gsm48_extract_mi(classmark2_lv, length - classmark_offset,
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mi_string, mi_type);
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}
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uint8_t sms_next_rp_msg_ref(uint8_t *next_rp_ref)
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{
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const uint8_t rp_msg_ref = *next_rp_ref;
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/*
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* This should wrap as the valid range is 0 to 255. We only
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* transfer one SMS at a time so we don't need to check if
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* the id has been already assigned.
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*/
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*next_rp_ref += 1;
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return rp_msg_ref;
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}
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