495 lines
17 KiB
C
495 lines
17 KiB
C
/*
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* Handle the connection to the MSC. This include ping/timeout/reconnect
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* (C) 2008-2018 by Harald Welte <laforge@gnumonks.org>
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* (C) 2009-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009-2015 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/ctrl/control_cmd.h>
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#include <osmocom/ctrl/control_if.h>
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#include <osmocom/crypt/auth.h>
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#include <osmocom/bsc/debug.h>
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#include <osmocom/bsc/gsm_data.h>
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#include <osmocom/bsc/ipaccess.h>
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#include <osmocom/bsc/bsc_msc_data.h>
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#include <osmocom/bsc/osmo_bsc_sigtran.h>
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#include <osmocom/bsc/signal.h>
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#include <osmocom/bsc/bts.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/gsm/gsm0808.h>
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#include <osmocom/gsm/gsm23236.h>
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#include <osmocom/abis/ipa.h>
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#include <osmocom/mgcp_client/mgcp_client.h>
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#include <osmocom/mgcp_client/mgcp_client_pool.h>
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#include <sys/socket.h>
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#include <netinet/tcp.h>
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#include <unistd.h>
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static const struct rate_ctr_desc msc_ctr_description[] = {
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/* Rx message counters (per specific message) */
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[MSC_CTR_BSSMAP_RX_UDT_RESET_ACKNOWLEDGE] = {
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"bssmap:rx:udt:reset:ack",
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"Number of received BSSMAP UDT RESET ACKNOWLEDGE messages"
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},
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[MSC_CTR_BSSMAP_RX_UDT_RESET] = {
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"bssmap:rx:udt:reset:request",
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"Number of received BSSMAP UDT RESET messages"
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},
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[MSC_CTR_BSSMAP_RX_UDT_PAGING] = {
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"bssmap:rx:udt:paging",
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"Number of received BSSMAP UDT PAGING messages"
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},
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[MSC_CTR_BSSMAP_RX_UDT_UNKNOWN] = {
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"bssmap:rx:udt:err_unknown",
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"Number of received BSSMAP unknown UDT messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_CLEAR_CMD] = {
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"bssmap:rx:dt1:clear:cmd",
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"Number of received BSSMAP DT1 CLEAR CMD messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_CIPHER_MODE_CMD] = {
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"bssmap:rx:dt1:cipher_mode:cmd",
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"Number of received BSSMAP DT1 CIPHER MODE CMD messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_ASSIGNMENT_RQST] = {
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"bssmap:rx:dt1:assignment:rqst",
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"Number of received BSSMAP DT1 ASSIGNMENT RQST messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_LCLS_CONNECT_CTRL] = {
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"bssmap:rx:dt1:lcls_connect_ctrl:cmd",
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"Number of received BSSMAP DT1 LCLS CONNECT CTRL messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_HANDOVER_RQST] = {
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"bssmap:rx:dt1:handover:rqst",
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"Number of received BSSMAP DT1 HANDOVER RQST messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_HANDOVER_CMD] = {
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"bssmap:rx:dt1:handover:cmd",
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"Number of received BSSMAP DT1 HANDOVER CMD messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_CLASSMARK_RQST] = {
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"bssmap:rx:dt1:classmark:rqst",
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"Number of received BSSMAP DT1 CLASSMARK RQST messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_CONFUSION] = {
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"bssmap:rx:dt1:confusion",
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"Number of received BSSMAP DT1 CONFUSION messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_COMMON_ID] = {
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"bssmap:rx:dt1:common_id",
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"Number of received BSSMAP DT1 COMMON ID messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_UNKNOWN] = {
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"bssmap:rx:dt1:err_unknown",
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"Number of received BSSMAP unknown DT1 messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_DTAP] = {
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"bssmap:rx:dt1:dtap:good",
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"Number of received BSSMAP DTAP messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_DTAP_ERROR] = {
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"bssmap:rx:dt1:dtap:error",
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"Number of received BSSMAP DTAP messages with errors"
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},
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[MSC_CTR_BSSMAP_RX_DT1_PERFORM_LOCATION_REQUEST] = {
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"bssmap:rx:dt1:location:request",
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"Number of received BSSMAP Perform Location Request messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_PERFORM_LOCATION_ABORT] = {
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"bssmap:tx:dt1:location:abort",
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"Number of received BSSMAP Perform Location Abort messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_VGCS_VBS_SETUP] = {
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"bssmap:rx:dt1:vgcs_vbs_setup",
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"Number of received BSSMAP DT1 VGCS/VBS SETUP messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_VGCS_VBS_ASSIGN_RQST] = {
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"bssmap:rx:dt1:vgcs_vbs_assignment:req",
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"Number of received BSSMAP DT1 VGCS/VBS ASSIGNMENT messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_UPLINK_RQST_ACKNOWLEDGE] = {
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"bssmap:rx:dt1:uplink_rqst:ack",
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"Number of received BSSMAP DT1 UPLINK REQUEST ACKNOWLEDGE messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_UPLINK_REJECT_CMD] = {
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"bssmap:rx:dt1:uplink_reject:cmd",
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"Number of received BSSMAP DT1 UPLINK REJECT COMMAND messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_UPLINK_RELEASE_CMD] = {
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"bssmap:rx:dt1:uplink_release:cmd",
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"Number of received BSSMAP DT1 UPLINK RELEASE COMMAND messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_UPLINK_SEIZED_CMD] = {
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"bssmap:rx:dt1:uplink_seized:cmd",
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"Number of received BSSMAP DT1 UPLINK SEIZED COMMAND messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_VGCS_ADDL_INFO] = {
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"bssmap:rx:dt1:vgcs_addl_info",
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"Number of received BSSMAP DT1 VGCS/VBS ASSITIONAL INFORMATION messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_VGCS_SMS] = {
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"bssmap:rx:dt1:vgcs_sms",
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"Number of received BSSMAP DT1 VGCS SMS messages"
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},
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[MSC_CTR_BSSMAP_RX_DT1_NOTIFICATION_DATA] = {
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"bssmap:rx:dt1:notification_data",
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"Number of received BSSMAP DT1 NOTIFICATION DATA messages"
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},
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/* Tx message counters (per message type)
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*
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* The counters here follow the logic of the osmo_bsc_sigtran_send() function
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* which receives DT1 messages from the upper layers and actually sends them to the MSC.
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* These counters cover all messages passed to the function by the upper layers: */
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[MSC_CTR_BSSMAP_TX_BSS_MANAGEMENT] = {
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"bssmap:tx:type:bss_management",
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"Number of transmitted BSS MANAGEMENT messages"
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},
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[MSC_CTR_BSSMAP_TX_DTAP] = {
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"bssmap:tx:type:dtap",
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"Number of transmitted DTAP messages"
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},
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[MSC_CTR_BSSMAP_TX_UNKNOWN] = {
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"bssmap:tx:type:err_unknown",
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"Number of transmitted messages with unknown type (an error in our code?)"
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},
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[MSC_CTR_BSSMAP_TX_SHORT] = {
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"bssmap:tx:type:err_short",
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"Number of transmitted messages which are too short (an error in our code?)"
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},
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/* The next counters are also counted in the osmo_bsc_sigtran_send() function and
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* sum up to the exactly same number as the counters above but instead of message
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* classes they split by the result of the sending attempt: */
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[MSC_CTR_BSSMAP_TX_ERR_CONN_NOT_READY] = {
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"bssmap:tx:result:err_conn_not_ready",
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"Number of BSSMAP messages we tried to send when the connection was not ready yet"
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},
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[MSC_CTR_BSSMAP_TX_ERR_SEND] = {
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"bssmap:tx:result:err_send",
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"Number of socket errors while sending BSSMAP messages"
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},
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[MSC_CTR_BSSMAP_TX_SUCCESS] = {
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"bssmap:tx:result:success",
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"Number of successfully sent BSSMAP messages"
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},
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/* Tx message counters (per specific message)
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*
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* Theoretically, the DT1 counters should sum up to the same number as the Tx counters
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* above but since these counters are coming from the upper layers, there might be
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* some difference if we forget some code path. */
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[MSC_CTR_BSSMAP_TX_UDT_RESET] = {
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"bssmap:tx:udt:reset:request",
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"Number of transmitted BSSMAP UDT RESET messages"
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},
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[MSC_CTR_BSSMAP_TX_UDT_RESET_ACK] = {
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"bssmap:tx:udt:reset:ack",
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"Number of transmitted BSSMAP UDT RESET ACK messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_CLEAR_RQST] = {
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"bssmap:tx:dt1:clear:rqst",
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"Number of transmitted BSSMAP DT1 CLEAR RQSTtx messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_CLEAR_COMPLETE] = {
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"bssmap:tx:dt1:clear:complete",
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"Number of transmitted BSSMAP DT1 CLEAR COMPLETE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_ASSIGNMENT_FAILURE] = {
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"bssmap:tx:dt1:assignment:failure",
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"Number of transmitted BSSMAP DT1 ASSIGNMENT FAILURE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_ASSIGNMENT_COMPLETE] = {
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"bssmap:tx:dt1:assignment:complete",
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"Number of transmitted BSSMAP DT1 ASSIGNMENT COMPLETE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_SAPI_N_REJECT] = {
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"bssmap:tx:dt1:sapi_n:reject",
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"Number of transmitted BSSMAP DT1 SAPI N REJECT messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_CIPHER_COMPLETE] = {
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"bssmap:tx:dt1:cipher_mode:complete",
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"Number of transmitted BSSMAP DT1 CIPHER COMPLETE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_CIPHER_REJECT] = {
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"bssmap:tx:dt1:cipher_mode:reject",
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"Number of transmitted BSSMAP DT1 CIPHER REJECT messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_CLASSMARK_UPDATE] = {
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"bssmap:tx:dt1:classmark:update",
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"Number of transmitted BSSMAP DT1 CLASSMARK UPDATE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_LCLS_CONNECT_CTRL_ACK] = {
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"bssmap:tx:dt1:lcls_connect_ctrl:ack",
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"Number of transmitted BSSMAP DT1 LCLS CONNECT CTRL ACK messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_HANDOVER_REQUIRED] = {
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"bssmap:tx:dt1:handover:required",
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"Number of transmitted BSSMAP DT1 HANDOVER REQUIRED messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_HANDOVER_PERFORMED] = {
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"bssmap:tx:dt1:handover:performed",
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"Number of transmitted BSSMAP DT1 HANDOVER PERFORMED messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_HANDOVER_RQST_ACKNOWLEDGE] = {
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"bssmap:tx:dt1:handover:rqst_acknowledge",
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"Number of transmitted BSSMAP DT1 HANDOVER RQST ACKNOWLEDGE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_HANDOVER_DETECT] = {
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"bssmap:tx:dt1:handover:detect",
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"Number of transmitted BSSMAP DT1 HANDOVER DETECT messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_HANDOVER_COMPLETE] = {
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"bssmap:tx:dt1:handover:complete",
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"Number of transmitted BSSMAP DT1 HANDOVER COMPLETE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_HANDOVER_FAILURE] = {
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"bssmap:tx:dt1:handover:failure",
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"Number of transmitted BSSMAP DT1 HANDOVER FAILURE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_DTAP] = {
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"bssmap:tx:dt1:dtap",
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"Number of transmitted BSSMAP DT1 DTAP messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_PERFORM_LOCATION_RESPONSE_SUCCESS] = {
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"bssmap:tx:dt1:location:response_success",
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"Number of transmitted BSSMAP Perform Location Response messages containing a location estimate"
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},
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[MSC_CTR_BSSMAP_TX_DT1_PERFORM_LOCATION_RESPONSE_FAILURE] = {
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"bssmap:tx:dt1:location:response_failure",
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"Number of transmitted BSSMAP Perform Location Response messages containing a failure cause"
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},
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[MSC_CTR_BSSMAP_TX_DT1_VGCS_VBS_SETUP_ACK] = {
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"bssmap:tx:dt1:vgcs_vbs_setup:ack",
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"Number of transmitted BSSMAP DT1 VGCS/VBS SETUP ACK messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_VGCS_VBS_SETUP_REFUSE] = {
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"bssmap:tx:dt1:vgcs_vbs_setup:refuse",
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"Number of transmitted BSSMAP DT1 VGCS/VBS SETUP REFUSE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_VGCS_VBS_ASSIGN_RESULT] = {
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"bssmap:tx:dt1:vgcs_vbs_assignment:res",
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"Number of transmitted BSSMAP DT1 VGCS/VBS ASSIGNMENT RESULT messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_VGCS_VBS_ASSIGN_FAIL] = {
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"bssmap:tx:dt1:vgcs_vbs_assignment:fail",
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"Number of transmitted BSSMAP DT1 VGCS/VBS ASSIGNMENT FAILURE messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_VGCS_VBS_QUEUING_INDICATION] = {
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"bssmap:tx:dt1:vgcs_vbs_queuing:ind",
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"Number of transmitted BSSMAP DT1 VGCS/VBS QUEUING INDICATION messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_UPLINK_RQST] = {
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"bssmap:tx:dt1:uplink_rqst",
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"Number of transmitted BSSMAP DT1 UPLINK REQUEST messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_VGCS_VBS_ASSIGNMENT_STATUS] = {
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"bssmap:tx:dt1:vgcs_vbs_assignment:status",
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"Number of transmitted BSSMAP DT1 VGCS/VBS ASSIGNMENT STATUS messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_VGCS_VBS_AREA_CELL_INFO] = {
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"bssmap:tx:dt1:vgcs_vbs_area_cell:info",
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"Number of transmitted BSSMAP DT1 VGCS/VBS AREA CELL INFO messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_UPLINK_RQST_CONFIRMATION] = {
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"bssmap:tx:dt1:uplink_rqst:cnf",
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"Number of transmitted BSSMAP DT1 UPLINK REQUEST CONFIRMATION messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_UPLINK_RELEASE_INDICATION] = {
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"bssmap:tx:dt1:uplink_release:ind",
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"Number of transmitted BSSMAP DT1 UPLINK RELEASE INDICATION messages"
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},
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[MSC_CTR_BSSMAP_TX_DT1_UPLINK_APP_DATA] = {
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"bssmap:tx:dt1:uplink_app_data",
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"Number of transmitted BSSMAP DT1 UPLINK APPLICATION DATA messages"
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},
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/* Indicators for MSC pool usage */
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[MSC_CTR_MSCPOOL_SUBSCR_NEW] = {
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"mscpool:subscr:new",
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"Complete Layer 3 requests assigned to this MSC by round-robin (no NRI was assigned yet).",
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},
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[MSC_CTR_MSCPOOL_SUBSCR_REATTACH] = {
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"mscpool:subscr:reattach",
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"Complete Layer 3 requests assigned to this MSC by round-robin because the subscriber indicates a"
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" NULL-NRI (previously assigned by another MSC).",
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},
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[MSC_CTR_MSCPOOL_SUBSCR_KNOWN] = {
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"mscpool:subscr:known",
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"Complete Layer 3 requests directed to this MSC because the subscriber indicates an NRI of this MSC.",
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},
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[MSC_CTR_MSCPOOL_SUBSCR_PAGED] = {
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"mscpool:subscr:paged",
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"Paging Response directed to this MSC because the subscriber was recently paged by this MSC.",
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},
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[MSC_CTR_MSCPOOL_SUBSCR_ATTACH_LOST] = {
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"mscpool:subscr:attach_lost",
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"A subscriber indicates an NRI value matching this MSC, but the MSC is not connected:"
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" a re-attach to another MSC (if available) was forced, with possible service failure.",
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},
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[MSC_CTR_MSCPOOL_EMERG_FORWARDED] = {
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"mscpool:emerg:forwarded",
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"Emergency call requests forwarded to this MSC.",
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},
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};
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static const struct rate_ctr_group_desc msc_ctrg_desc = {
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"msc",
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"mobile switching center",
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OSMO_STATS_CLASS_GLOBAL,
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ARRAY_SIZE(msc_ctr_description),
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msc_ctr_description,
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};
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static const struct osmo_stat_item_desc msc_stat_desc[] = {
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[MSC_STAT_MSC_LINKS_ACTIVE] = { "msc_links:active", "Number of active MSC links", "", 16, 0 },
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[MSC_STAT_MSC_LINKS_TOTAL] = { "msc_links:total", "Number of configured MSC links", "", 16, 0 },
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};
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static const struct osmo_stat_item_group_desc msc_statg_desc = {
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.group_name_prefix = "msc",
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.group_description = "mobile switching center",
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.class_id = OSMO_STATS_CLASS_GLOBAL,
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.num_items = ARRAY_SIZE(msc_stat_desc),
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.item_desc = msc_stat_desc,
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};
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int osmo_bsc_msc_init(struct bsc_msc_data *msc)
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{
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int rc;
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/* Everything below refers to SCCP-Lite MSC connections only. */
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if (msc_is_aoip(msc))
|
|
return 0;
|
|
|
|
rc = osmo_sock_init2_ofd(&msc->mgcp_ipa.ofd, AF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP,
|
|
msc->mgcp_ipa.local_addr, msc->mgcp_ipa.local_port,
|
|
NULL, 0, OSMO_SOCK_F_BIND);
|
|
if (rc < 0) {
|
|
LOGP(DMSC, LOGL_ERROR, "msc %u: Could not create/connect/bind MGCP proxy socket: %d\n",
|
|
msc->nr, rc);
|
|
return rc;
|
|
}
|
|
LOGP(DMSC, LOGL_INFO, "msc %u: Socket forwarding IPA-encapsulated MGCP messages towards MGW: %s\n",
|
|
msc->nr, osmo_sock_get_name2(msc->mgcp_ipa.ofd.fd));
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct bsc_msc_data *osmo_msc_data_find(struct gsm_network *net, int nr)
|
|
{
|
|
struct bsc_msc_data *msc_data;
|
|
|
|
llist_for_each_entry(msc_data, &net->mscs, entry)
|
|
if (msc_data->nr == nr)
|
|
return msc_data;
|
|
return NULL;
|
|
}
|
|
|
|
struct bsc_msc_data *osmo_msc_data_alloc(struct gsm_network *net, int nr)
|
|
{
|
|
struct bsc_msc_data *msc_data;
|
|
|
|
/* check if there is already one */
|
|
msc_data = osmo_msc_data_find(net, nr);
|
|
if (msc_data)
|
|
return msc_data;
|
|
|
|
msc_data = talloc_zero(net, struct bsc_msc_data);
|
|
if (!msc_data)
|
|
return NULL;
|
|
|
|
/* init statistics */
|
|
msc_data->msc_ctrs = rate_ctr_group_alloc(net, &msc_ctrg_desc, nr);
|
|
if (!msc_data->msc_ctrs) {
|
|
talloc_free(msc_data);
|
|
return NULL;
|
|
}
|
|
msc_data->msc_statg = osmo_stat_item_group_alloc(net, &msc_statg_desc, nr);
|
|
if (!msc_data->msc_statg) {
|
|
rate_ctr_group_free(msc_data->msc_ctrs);
|
|
talloc_free(msc_data);
|
|
return NULL;
|
|
}
|
|
|
|
llist_add_tail(&msc_data->entry, &net->mscs);
|
|
|
|
/* Init back pointer */
|
|
msc_data->network = net;
|
|
|
|
msc_data->core_plmn = (struct osmo_plmn_id){
|
|
.mcc = GSM_MCC_MNC_INVALID,
|
|
.mnc = GSM_MCC_MNC_INVALID,
|
|
};
|
|
|
|
msc_data->nr = nr;
|
|
msc_data->allow_emerg = 1;
|
|
msc_data->a.asp_proto = OSMO_SS7_ASP_PROT_M3UA;
|
|
|
|
/* Defaults for the audio setup */
|
|
msc_data->amr_conf.m5_90 = 1;
|
|
msc_data->amr_octet_aligned = true;
|
|
|
|
/* Allow the full set of possible codecs by default */
|
|
msc_data->audio_length = 5;
|
|
msc_data->audio_support[0].ver = 1;
|
|
msc_data->audio_support[0].hr = 0;
|
|
msc_data->audio_support[1].ver = 1;
|
|
msc_data->audio_support[1].hr = 1;
|
|
msc_data->audio_support[2].ver = 2;
|
|
msc_data->audio_support[2].hr = 0;
|
|
msc_data->audio_support[3].ver = 3;
|
|
msc_data->audio_support[3].hr = 0;
|
|
msc_data->audio_support[4].ver = 3;
|
|
msc_data->audio_support[4].hr = 1;
|
|
|
|
osmo_fd_setup(&msc_data->mgcp_ipa.ofd, -1, OSMO_FD_READ, &bsc_sccplite_mgcp_proxy_cb, msc_data, 0);
|
|
msc_data->mgcp_ipa.local_addr = NULL; /* = INADDR(6)_ANY */
|
|
msc_data->mgcp_ipa.local_port = 0; /* dynamic */
|
|
|
|
msc_data->nri_ranges = osmo_nri_ranges_alloc(msc_data);
|
|
msc_data->allow_attach = true;
|
|
|
|
return msc_data;
|
|
}
|
|
|
|
struct osmo_cell_global_id *cgi_for_msc(struct bsc_msc_data *msc, struct gsm_bts *bts)
|
|
{
|
|
static struct osmo_cell_global_id cgi;
|
|
|
|
if (!bts)
|
|
return NULL;
|
|
|
|
cgi.lai.plmn = msc->network->plmn;
|
|
if (msc->core_plmn.mcc != GSM_MCC_MNC_INVALID)
|
|
cgi.lai.plmn.mcc = msc->core_plmn.mcc;
|
|
if (msc->core_plmn.mnc != GSM_MCC_MNC_INVALID) {
|
|
cgi.lai.plmn.mnc = msc->core_plmn.mnc;
|
|
cgi.lai.plmn.mnc_3_digits = msc->core_plmn.mnc_3_digits;
|
|
}
|
|
cgi.lai.lac = bts->location_area_code;
|
|
cgi.cell_identity = bts->cell_identity;
|
|
|
|
return &cgi;
|
|
}
|