144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/* Implementation for MSC decisions which interface to send messages out on. */
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/* (C) 2016 by sysmocom s.m.f.c GmbH <info@sysmocom.de>
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*
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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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#include <osmocom/core/logging.h>
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#include <osmocom/msc/debug.h>
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#include <osmocom/msc/gsm_data.h>
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#include <osmocom/msc/msc_ifaces.h>
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#include <osmocom/msc/gsm_subscriber.h>
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#include <osmocom/msc/transaction.h>
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#include <osmocom/mgcp_client/mgcp_client.h>
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#include <osmocom/msc/vlr.h>
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#include <osmocom/msc/a_iface.h>
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#include <osmocom/msc/sgs_iface.h>
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#include <osmocom/msc/gsm_04_08.h>
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#include <osmocom/msc/msc_mgcp.h>
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#include "../../bscconfig.h"
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#ifdef BUILD_IU
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#include <osmocom/ranap/iu_client.h>
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#else
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#include <osmocom/msc/iu_dummy.h>
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#endif /* BUILD_IU */
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static int msc_tx(struct ran_conn *conn, struct msgb *msg)
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{
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if (!msg)
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return -EINVAL;
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if (!conn) {
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msgb_free(msg);
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return -EINVAL;
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}
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DEBUGP(DMSC, "msc_tx %u bytes to %s via %s\n",
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msg->len, vlr_subscr_name(conn->vsub),
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osmo_rat_type_name(conn->via_ran));
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switch (conn->via_ran) {
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case OSMO_RAT_GERAN_A:
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msg->dst = conn;
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return a_iface_tx_dtap(msg);
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case OSMO_RAT_UTRAN_IU:
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msg->dst = conn->iu.ue_ctx;
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return ranap_iu_tx(msg, 0);
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case OSMO_RAT_EUTRAN_SGS:
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msg->dst = conn;
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return sgs_iface_tx_dtap_ud(msg);
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default:
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LOGP(DMSC, LOGL_ERROR,
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"msc_tx(): conn->via_ran invalid (%d)\n",
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conn->via_ran);
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msgb_free(msg);
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return -1;
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}
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}
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int msc_tx_dtap(struct ran_conn *conn,
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struct msgb *msg)
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{
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return msc_tx(conn, msg);
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}
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/* 9.2.5 CM service accept */
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int msc_gsm48_tx_mm_serv_ack(struct ran_conn *conn)
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{
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struct msgb *msg;
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struct gsm48_hdr *gh;
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if (!conn)
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return -EINVAL;
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msg = gsm48_msgb_alloc_name("GSM 04.08 SERV ACC");
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gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
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gh->proto_discr = GSM48_PDISC_MM;
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gh->msg_type = GSM48_MT_MM_CM_SERV_ACC;
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DEBUGP(DMM, "-> CM SERVICE ACCEPT %s\n",
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vlr_subscr_name(conn->vsub));
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return msc_tx_dtap(conn, msg);
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}
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/* 9.2.6 CM service reject */
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int msc_gsm48_tx_mm_serv_rej(struct ran_conn *conn,
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enum gsm48_reject_value value)
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{
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struct msgb *msg;
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if (!conn)
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return -EINVAL;
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msg = gsm48_create_mm_serv_rej(value);
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if (!msg) {
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LOGP(DMM, LOGL_ERROR, "Failed to allocate CM Service Reject.\n");
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return -1;
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}
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DEBUGP(DMM, "-> CM SERVICE Reject cause: %d\n", value);
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return msc_tx_dtap(conn, msg);
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}
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int msc_tx_common_id(struct ran_conn *conn)
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{
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if (!conn)
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return -EINVAL;
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/* Common ID is only sent over IuCS */
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if (conn->via_ran != OSMO_RAT_UTRAN_IU) {
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LOGP(DMM, LOGL_INFO,
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"%s: Asked to transmit Common ID, but skipping"
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" because this is not on UTRAN\n",
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vlr_subscr_name(conn->vsub));
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return 0;
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}
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DEBUGP(DIUCS, "%s: tx CommonID %s\n",
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vlr_subscr_name(conn->vsub), conn->vsub->imsi);
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return ranap_iu_tx_common_id(conn->iu.ue_ctx, conn->vsub->imsi);
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}
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