142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/* (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009-2011 by On-Waves
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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 <osmocom/gsm/gsm48.h>
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#include <osmocom/bsc/osmo_bsc.h>
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#include <osmocom/bsc/bsc_msc_data.h>
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#include <osmocom/bsc/gsm_04_08_rr.h>
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#include <osmocom/bsc/bsc_subscriber.h>
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#include <osmocom/bsc/debug.h>
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#include <osmocom/bsc/paging.h>
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#include <osmocom/bsc/gsm_04_08_rr.h>
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#include <osmocom/bsc/bts.h>
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#include <stdlib.h>
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static int bsc_patch_mm_info(struct gsm_subscriber_connection *conn,
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uint8_t *data, unsigned int length)
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{
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struct tlv_parsed tp;
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int parse_res;
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int tzunits;
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uint8_t tzbsd = 0;
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uint8_t dst = 0;
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/* Is TZ patching enabled? */
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struct gsm_tz *tz = &conn->network->tz;
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if (!tz->override)
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return 0;
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parse_res = tlv_parse(&tp, &gsm48_mm_att_tlvdef, data, length, 0, 0);
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if (parse_res <= 0 && parse_res != -3)
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/* FIXME: -3 means unknown IE error, so this accepts messages
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* with unknown IEs. But parsing has aborted with the unknown
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* IE and the message is broken or parsed incompletely. */
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return 0;
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/* Convert tz.hr and tz.mn to units */
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if (tz->hr < 0) {
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tzunits = -tz->hr*4;
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tzbsd |= 0x08;
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} else
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tzunits = tz->hr*4;
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tzunits = tzunits + (tz->mn/15);
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tzbsd |= (tzunits % 10)*0x10 + (tzunits / 10);
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/* Convert DST value */
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if (tz->dst >= 0 && tz->dst <= 2)
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dst = tz->dst;
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if (TLVP_PRESENT(&tp, GSM48_IE_UTC)) {
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LOGP(DMSC, LOGL_DEBUG,
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"Changing 'Local time zone' from 0x%02x to 0x%02x.\n",
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TLVP_VAL(&tp, GSM48_IE_UTC)[6], tzbsd);
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((uint8_t *)(TLVP_VAL(&tp, GSM48_IE_UTC)))[0] = tzbsd;
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}
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if (TLVP_PRESENT(&tp, GSM48_IE_NET_TIME_TZ)) {
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LOGP(DMSC, LOGL_DEBUG,
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"Changing 'Universal time and local time zone' TZ from "
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"0x%02x to 0x%02x.\n",
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TLVP_VAL(&tp, GSM48_IE_NET_TIME_TZ)[6], tzbsd);
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((uint8_t *)(TLVP_VAL(&tp, GSM48_IE_NET_TIME_TZ)))[6] = tzbsd;
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}
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#ifdef GSM48_IE_NET_DST
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if (TLVP_PRESENT(&tp, GSM48_IE_NET_DST)) {
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LOGP(DMSC, LOGL_DEBUG,
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"Changing 'Network daylight saving time' from "
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"0x%02x to 0x%02x.\n",
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TLVP_VAL(&tp, GSM48_IE_NET_DST)[0], dst);
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((uint8_t *)(TLVP_VAL(&tp, GSM48_IE_NET_DST)))[0] = dst;
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}
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#endif
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return 0;
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}
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/**
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* Messages coming back from the MSC.
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*/
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int bsc_scan_msc_msg(struct gsm_subscriber_connection *conn, struct msgb *msg)
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{
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struct gsm48_hdr *gh;
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uint8_t pdisc;
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uint8_t mtype;
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int length = msgb_l3len(msg);
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if (length < sizeof(*gh)) {
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LOGP(DMSC, LOGL_ERROR, "GSM48 header does not fit.\n");
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return -1;
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}
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gh = (struct gsm48_hdr *) msgb_l3(msg);
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length -= (const char *)&gh->data[0] - (const char *)gh;
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pdisc = gsm48_hdr_pdisc(gh);
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if (pdisc != GSM48_PDISC_MM)
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return 0;
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mtype = gsm48_hdr_msg_type(gh);
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if (mtype == GSM48_MT_MM_INFO) {
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bsc_patch_mm_info(conn, &gh->data[0], length);
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}
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if (conn && conn->lchan) {
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struct rate_ctr_group *bts_ctrs = conn->lchan->ts->trx->bts->bts_ctrs;
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switch (mtype) {
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case GSM48_MT_MM_LOC_UPD_ACCEPT:
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rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_LOCATION_UPDATE_ACCEPT));
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break;
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case GSM48_MT_MM_LOC_UPD_REJECT:
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rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_LOCATION_UPDATE_REJECT));
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break;
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case GSM48_MT_MM_IMSI_DETACH_IND:
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rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_LOCATION_UPDATE_DETACH));
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break;
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default:
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rate_ctr_inc(rate_ctr_group_get_ctr(bts_ctrs, BTS_CTR_LOCATION_UPDATE_UNKNOWN));
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break;
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}
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}
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return 0;
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}
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