| /* Implementation for MSC decisions which interface to send messages out on. */ |
| |
| /* (C) 2016 by sysmocom s.m.f.c GmbH <info@sysmocom.de> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <osmocom/core/logging.h> |
| |
| #include <osmocom/msc/debug.h> |
| #include <osmocom/msc/gsm_data.h> |
| #include <osmocom/msc/msc_ifaces.h> |
| #include <osmocom/msc/gsm_subscriber.h> |
| #include <osmocom/msc/transaction.h> |
| #include <osmocom/mgcp_client/mgcp_client.h> |
| #include <osmocom/msc/vlr.h> |
| #include <osmocom/msc/a_iface.h> |
| #include <osmocom/msc/gsm_04_08.h> |
| #include <osmocom/msc/msc_mgcp.h> |
| |
| #include "../../bscconfig.h" |
| |
| #ifdef BUILD_IU |
| #include <osmocom/ranap/iu_client.h> |
| #else |
| #include <osmocom/msc/iu_dummy.h> |
| #endif /* BUILD_IU */ |
| |
| const struct value_string ran_type_names[] = { |
| OSMO_VALUE_STRING(RAN_UNKNOWN), |
| OSMO_VALUE_STRING(RAN_GERAN_A), |
| OSMO_VALUE_STRING(RAN_UTRAN_IU), |
| { 0, NULL } |
| }; |
| |
| static int msc_tx(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| if (!msg) |
| return -EINVAL; |
| if (!conn) { |
| msgb_free(msg); |
| return -EINVAL; |
| } |
| |
| DEBUGP(DMSC, "msc_tx %u bytes to %s via %s\n", |
| msg->len, vlr_subscr_name(conn->vsub), |
| ran_type_name(conn->via_ran)); |
| switch (conn->via_ran) { |
| case RAN_GERAN_A: |
| msg->dst = conn; |
| return a_iface_tx_dtap(msg); |
| |
| case RAN_UTRAN_IU: |
| msg->dst = conn->iu.ue_ctx; |
| return ranap_iu_tx(msg, 0); |
| |
| default: |
| LOGP(DMSC, LOGL_ERROR, |
| "msc_tx(): conn->via_ran invalid (%d)\n", |
| conn->via_ran); |
| msgb_free(msg); |
| return -1; |
| } |
| } |
| |
| |
| int msc_tx_dtap(struct gsm_subscriber_connection *conn, |
| struct msgb *msg) |
| { |
| return msc_tx(conn, msg); |
| } |
| |
| |
| /* 9.2.5 CM service accept */ |
| int msc_gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn) |
| { |
| struct msgb *msg; |
| struct gsm48_hdr *gh; |
| |
| if (!conn) |
| return -EINVAL; |
| |
| msg = gsm48_msgb_alloc_name("GSM 04.08 SERV ACC"); |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_CM_SERV_ACC; |
| |
| DEBUGP(DMM, "-> CM SERVICE ACCEPT %s\n", |
| vlr_subscr_name(conn->vsub)); |
| |
| return msc_tx_dtap(conn, msg); |
| } |
| |
| /* 9.2.6 CM service reject */ |
| int msc_gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn, |
| enum gsm48_reject_value value) |
| { |
| struct msgb *msg; |
| |
| if (!conn) |
| return -EINVAL; |
| |
| msg = gsm48_create_mm_serv_rej(value); |
| if (!msg) { |
| LOGP(DMM, LOGL_ERROR, "Failed to allocate CM Service Reject.\n"); |
| return -1; |
| } |
| |
| DEBUGP(DMM, "-> CM SERVICE Reject cause: %d\n", value); |
| |
| return msc_tx_dtap(conn, msg); |
| } |
| |
| int msc_tx_common_id(struct gsm_subscriber_connection *conn) |
| { |
| if (!conn) |
| return -EINVAL; |
| |
| /* Common ID is only sent over IuCS */ |
| if (conn->via_ran != RAN_UTRAN_IU) { |
| LOGP(DMM, LOGL_INFO, |
| "%s: Asked to transmit Common ID, but skipping" |
| " because this is not on UTRAN\n", |
| vlr_subscr_name(conn->vsub)); |
| return 0; |
| } |
| |
| DEBUGP(DIUCS, "%s: tx CommonID %s\n", |
| vlr_subscr_name(conn->vsub), conn->vsub->imsi); |
| return ranap_iu_tx_common_id(conn->iu.ue_ctx, conn->vsub->imsi); |
| } |