2244 lines
68 KiB
C
2244 lines
68 KiB
C
/* GSM Mobile Radio Interface Layer 3 Call Control */
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/* (C) 2008-2016 by Harald Welte <laforge@gnumonks.org>
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* (C) 2008-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
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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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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <time.h>
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#include <netinet/in.h>
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#include <regex.h>
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#include <sys/types.h>
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#include <osmocom/mgcp_client/mgcp_client_endpoint_fsm.h>
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#include <osmocom/msc/db.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/gsm_subscriber.h>
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#include <osmocom/msc/gsm_04_11.h>
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#include <osmocom/msc/gsm_04_08.h>
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#include <osmocom/msc/gsm_04_80.h>
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#include <osmocom/msc/gsm_04_14.h>
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#include <osmocom/msc/gsm_09_11.h>
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#include <osmocom/msc/signal.h>
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#include <osmocom/msc/transaction.h>
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#include <osmocom/msc/silent_call.h>
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#include <osmocom/msc/mncc_int.h>
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#include <osmocom/abis/e1_input.h>
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#include <osmocom/core/bitvec.h>
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#include <osmocom/msc/vlr.h>
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#include <osmocom/msc/msub.h>
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#include <osmocom/msc/msc_a.h>
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#include <osmocom/msc/paging.h>
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#include <osmocom/msc/call_leg.h>
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#include <osmocom/msc/rtp_stream.h>
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#include <osmocom/msc/mncc_call.h>
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#include <osmocom/msc/msc_t.h>
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#include <osmocom/gsm/gsm48.h>
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#include <osmocom/gsm/gsm0480.h>
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#include <osmocom/gsm/gsm_utils.h>
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#include <osmocom/gsm/protocol/gsm_04_08.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/byteswap.h>
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#include <osmocom/gsm/tlv.h>
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#include <osmocom/crypt/auth.h>
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#include <assert.h>
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static int gsm48_cc_tx_setup(struct gsm_trans *trans, void *arg);
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static int gsm48_cc_tx_release(struct gsm_trans *trans, void *arg);
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static int gsm48_cc_tx_disconnect(struct gsm_trans *trans, void *arg);
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static int trans_tx_gsm48(struct gsm_trans *trans, struct msgb *msg)
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{
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struct gsm48_hdr *gh = (struct gsm48_hdr *) msg->data;
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gh->proto_discr = GSM48_PDISC_CC | (trans->transaction_id << 4);
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OMSC_LINKID_CB(msg) = trans->dlci;
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return msc_a_tx_dtap_to_i(trans->msc_a, msg);
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}
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uint32_t msc_cc_next_outgoing_callref() {
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static uint32_t last_callref = 0x80000000;
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last_callref++;
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if (last_callref < 0x80000001)
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last_callref = 0x80000001;
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return last_callref;
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}
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static void gsm48_cc_guard_timeout(void *arg)
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{
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struct gsm_trans *trans = arg;
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LOG_TRANS(trans, LOGL_DEBUG, "guard timeout expired\n");
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trans_free(trans);
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return;
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}
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static void gsm48_stop_guard_timer(struct gsm_trans *trans)
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{
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if (osmo_timer_pending(&trans->cc.timer_guard)) {
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LOG_TRANS(trans, LOGL_DEBUG, "stopping pending guard timer\n");
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osmo_timer_del(&trans->cc.timer_guard);
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}
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}
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static void gsm48_start_guard_timer(struct gsm_trans *trans)
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{
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/* NOTE: The purpose of this timer is to prevent the cc state machine
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* from hanging in cases where mncc, gsm48 or both become unresponsive
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* for some reason. The timer is started initially with the setup from
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* the gsm48 side and then re-started with every incoming mncc message.
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* Once the mncc state reaches its active state the timer is stopped.
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* So if the cc state machine does not show any activity for an
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* extended amount of time during call setup or teardown the guard
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* timer will time out and hard-clear the connection. */
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if (osmo_timer_pending(&trans->cc.timer_guard))
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gsm48_stop_guard_timer(trans);
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LOG_TRANS(trans, LOGL_DEBUG, "starting guard timer with %d seconds\n", trans->net->mncc_guard_timeout);
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osmo_timer_setup(&trans->cc.timer_guard, gsm48_cc_guard_timeout, trans);
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osmo_timer_schedule(&trans->cc.timer_guard,
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trans->net->mncc_guard_timeout, 0);
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}
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/* Call Control */
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void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg)
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{
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net->mncc_recv(net, msg);
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}
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int gsm48_cc_tx_notify_ss(struct gsm_trans *trans, const char *message)
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{
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struct gsm48_hdr *gh;
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struct msgb *ss_notify;
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ss_notify = gsm0480_create_notifySS(message);
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if (!ss_notify)
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return -1;
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gsm0480_wrap_invoke(ss_notify, GSM0480_OP_CODE_NOTIFY_SS, 0);
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uint8_t *data = msgb_push(ss_notify, 1);
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data[0] = ss_notify->len - 1;
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gh = (struct gsm48_hdr *) msgb_push(ss_notify, sizeof(*gh));
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gh->msg_type = GSM48_MT_CC_FACILITY;
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return trans_tx_gsm48(trans, ss_notify);
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}
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/* FIXME: this count_statistics is a state machine behaviour. we should convert
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* the complete call control into a state machine. Afterwards we can move this
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* code into state transitions.
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*/
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static void count_statistics(struct gsm_trans *trans, int new_state)
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{
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int old_state = trans->cc.state;
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struct rate_ctr_group *msc = trans->net->msc_ctrs;
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if (old_state == new_state)
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return;
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/* state incoming */
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switch (new_state) {
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case GSM_CSTATE_ACTIVE:
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osmo_stat_item_inc(osmo_stat_item_group_get_item(trans->net->statg, MSC_STAT_ACTIVE_CALLS),
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1);
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rate_ctr_inc(rate_ctr_group_get_ctr(msc, MSC_CTR_CALL_ACTIVE));
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break;
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}
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/* state outgoing */
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switch (old_state) {
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case GSM_CSTATE_ACTIVE:
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osmo_stat_item_dec(osmo_stat_item_group_get_item(trans->net->statg, MSC_STAT_ACTIVE_CALLS),
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1);
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if (new_state == GSM_CSTATE_DISCONNECT_REQ ||
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new_state == GSM_CSTATE_DISCONNECT_IND)
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rate_ctr_inc(rate_ctr_group_get_ctr(msc, MSC_CTR_CALL_COMPLETE));
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else
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rate_ctr_inc(rate_ctr_group_get_ctr(msc, MSC_CTR_CALL_INCOMPLETE));
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break;
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}
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}
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static void new_cc_state(struct gsm_trans *trans, int state)
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{
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if (state > 31 || state < 0)
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return;
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LOG_TRANS(trans, LOGL_DEBUG, "new state %s -> %s\n",
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gsm48_cc_state_name(trans->cc.state),
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gsm48_cc_state_name(state));
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count_statistics(trans, state);
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trans->cc.state = state;
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/* Stop the guard timer when a call reaches the active state */
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if (state == GSM_CSTATE_ACTIVE)
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gsm48_stop_guard_timer(trans);
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}
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static int gsm48_cc_tx_status(struct gsm_trans *trans, void *arg)
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{
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struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC STATUS");
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struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
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uint8_t *cause, *call_state;
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gh->msg_type = GSM48_MT_CC_STATUS;
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cause = msgb_put(msg, 3);
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cause[0] = 2;
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cause[1] = GSM48_CAUSE_CS_GSM | GSM48_CAUSE_LOC_USER;
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cause[2] = 0x80 | 30; /* response to status inquiry */
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call_state = msgb_put(msg, 1);
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call_state[0] = 0xc0 | 0x00;
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return trans_tx_gsm48(trans, msg);
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}
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static void gsm48_stop_cc_timer(struct gsm_trans *trans)
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{
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if (osmo_timer_pending(&trans->cc.timer)) {
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LOG_TRANS(trans, LOGL_DEBUG, "stopping pending timer T%x\n", trans->cc.Tcurrent);
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osmo_timer_del(&trans->cc.timer);
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trans->cc.Tcurrent = 0;
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}
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}
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static int mncc_recvmsg(struct gsm_network *net, struct gsm_trans *trans,
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int msg_type, struct gsm_mncc *mncc)
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{
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struct msgb *msg;
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unsigned char *data;
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LOG_TRANS_CAT(trans, DMNCC, LOGL_DEBUG, "tx %s\n", get_mncc_name(msg_type));
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mncc->msg_type = msg_type;
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msg = msgb_alloc(sizeof(struct gsm_mncc), "MNCC");
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if (!msg)
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return -ENOMEM;
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data = msgb_put(msg, sizeof(struct gsm_mncc));
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memcpy(data, mncc, sizeof(struct gsm_mncc));
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cc_tx_to_mncc(net, msg);
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/* trans may be NULL when sending an MNCC error reply upon an invalid MNCC request */
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if (trans)
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trans->cc.mncc_initiated = true;
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return 0;
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}
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int mncc_release_ind(struct gsm_network *net, struct gsm_trans *trans,
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uint32_t callref, int location, int value)
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{
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struct gsm_mncc rel;
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memset(&rel, 0, sizeof(rel));
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rel.callref = callref;
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mncc_set_cause(&rel, location, value);
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if (trans && trans->cc.state == GSM_CSTATE_RELEASE_REQ)
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return mncc_recvmsg(net, trans, MNCC_REL_CNF, &rel);
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return mncc_recvmsg(net, trans, MNCC_REL_IND, &rel);
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}
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/* Call Control Specific transaction release.
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* gets called by trans_free, DO NOT CALL YOURSELF! */
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void _gsm48_cc_trans_free(struct gsm_trans *trans)
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{
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gsm48_stop_cc_timer(trans);
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/* send release to L4, if callref still exists */
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if (trans->callref) {
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/* Send MNCC REL.ind (cause='Resource unavailable') */
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if (trans->cc.mncc_initiated) {
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mncc_release_ind(trans->net, trans, trans->callref,
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GSM48_CAUSE_LOC_PRN_S_LU,
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GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
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}
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/* FIXME: currently, a CC trans that would not yet be in state GSM_CSTATE_RELEASE_REQ fails to send a
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* CC Release to the MS if it gets freed here. Hack it to do so. */
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if (trans->cc.state != GSM_CSTATE_RELEASE_REQ) {
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struct gsm_mncc rel = {};
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rel.callref = trans->callref;
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mncc_set_cause(&rel, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
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gsm48_cc_tx_release(trans, &rel);
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}
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/* This is a final freeing of the transaction. The MNCC release may have triggered the
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* T308 release timer, but we don't have the luxury of graceful CC Release here. */
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gsm48_stop_cc_timer(trans);
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}
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if (trans->cc.state != GSM_CSTATE_NULL)
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new_cc_state(trans, GSM_CSTATE_NULL);
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gsm48_stop_guard_timer(trans);
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if (trans->msc_a && trans->msc_a->cc.active_trans == trans)
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trans->msc_a->cc.active_trans = NULL;
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}
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/* call-back from paging the B-end of the connection */
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static void cc_paging_cb(struct msc_a *msc_a, struct gsm_trans *trans)
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{
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if (trans->msc_a) {
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LOG_MSC_A_CAT(msc_a, DPAG, LOGL_ERROR,
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"Handle paging error: transaction already associated with subscriber,"
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" apparently it was already handled. Skip.\n");
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return;
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}
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if (msc_a) {
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LOG_TRANS(trans, LOGL_DEBUG, "Paging succeeded\n");
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/* Assign conn */
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msc_a_get(msc_a, MSC_A_USE_CC);
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trans->msc_a = msc_a;
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trans->paging_request = NULL;
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/* Get the GCR from the MO call leg (if any). */
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if (!trans->cc.lcls)
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trans->cc.lcls = trans_lcls_compose(trans, true);
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if (trans->cc.lcls && trans->cc.msg.fields & MNCC_F_GCR) {
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int rc = osmo_dec_gcr(&trans->cc.lcls->gcr,
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&trans->cc.msg.gcr[0],
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sizeof(trans->cc.msg.gcr));
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if (rc < 0)
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LOG_TRANS(trans, LOGL_ERROR, "Failed to parse GCR\n");
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else
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trans->cc.lcls->gcr_available = true;
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}
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osmo_fsm_inst_dispatch(msc_a->c.fi, MSC_A_EV_TRANSACTION_ACCEPTED, trans);
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/* send SETUP request to called party */
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gsm48_cc_tx_setup(trans, &trans->cc.msg);
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} else {
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LOG_TRANS(trans, LOGL_DEBUG, "Paging expired\n");
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/* Temporarily out of order */
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mncc_release_ind(trans->net, trans,
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trans->callref,
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GSM48_CAUSE_LOC_PRN_S_LU,
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GSM48_CC_CAUSE_DEST_OOO);
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trans->callref = 0;
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trans->paging_request = NULL;
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trans_free(trans);
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}
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}
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/* bridge channels of two transactions */
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static int tch_bridge(struct gsm_network *net, const struct gsm_mncc_bridge *bridge)
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{
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struct gsm_trans *trans1 = trans_find_by_callref(net, bridge->callref[0]);
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struct gsm_trans *trans2 = trans_find_by_callref(net, bridge->callref[1]);
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struct call_leg *cl1;
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struct call_leg *cl2;
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if (!trans1 || !trans2) {
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LOG_TRANS(trans1 ? : trans2, LOGL_ERROR, "Cannot MNCC_BRIDGE, one or both call legs are unset\n");
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return -EIO;
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}
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if (!trans1->msc_a || !trans2->msc_a) {
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LOG_TRANS(trans1, LOGL_ERROR, "Cannot MNCC_BRIDGE, one or both call legs lack an active connection\n");
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LOG_TRANS(trans2, LOGL_ERROR, "Cannot MNCC_BRIDGE, one or both call legs lack an active connection\n");
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return -EIO;
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}
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LOG_TRANS(trans1, LOGL_DEBUG, "MNCC_BRIDGE: Local bridge to callref 0x%x\n", trans2->callref);
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LOG_TRANS(trans2, LOGL_DEBUG, "MNCC_BRIDGE: Local bridge to callref 0x%x\n", trans1->callref);
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/* This call bridging mechanism is only used with the internal MNCC (with external MNCC briding would be done by
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* the PBX). For inter-MSC Handover scenarios, an external MNCC is mandatory. The conclusion is that in this
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* code path, there is only one MSC, and the MSC-I role is local, and hence we can directly access the ran_conn.
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* If we can't, then we must give up. */
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cl1 = trans1->msc_a->cc.call_leg;
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cl2 = trans2->msc_a->cc.call_leg;
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return call_leg_local_bridge(cl1, trans1->callref, trans1, cl2, trans2->callref, trans2);
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}
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static int gsm48_cc_rx_status_enq(struct gsm_trans *trans, struct msgb *msg)
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{
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LOG_TRANS(trans, LOGL_DEBUG, "-> STATUS ENQ\n");
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return gsm48_cc_tx_status(trans, msg);
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}
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static void gsm48_cc_timeout(void *arg)
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{
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struct gsm_trans *trans = arg;
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int disconnect = 0, release = 0;
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int mo_cause = GSM48_CC_CAUSE_RECOVERY_TIMER;
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int mo_location = GSM48_CAUSE_LOC_USER;
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int l4_cause = GSM48_CC_CAUSE_NORMAL_UNSPEC;
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int l4_location = GSM48_CAUSE_LOC_PRN_S_LU;
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struct gsm_mncc mo_rel, l4_rel;
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memset(&mo_rel, 0, sizeof(struct gsm_mncc));
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mo_rel.callref = trans->callref;
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memset(&l4_rel, 0, sizeof(struct gsm_mncc));
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l4_rel.callref = trans->callref;
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switch(trans->cc.Tcurrent) {
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case 0x303:
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release = 1;
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l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND;
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break;
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case 0x310:
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disconnect = 1;
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l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND;
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break;
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case 0x313:
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disconnect = 1;
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/* unknown, did not find it in the specs */
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break;
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case 0x301:
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disconnect = 1;
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l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND;
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break;
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case 0x308:
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if (!trans->cc.T308_second) {
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/* restart T308 a second time */
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gsm48_cc_tx_release(trans, &trans->cc.msg);
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trans->cc.T308_second = 1;
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break; /* stay in release state */
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}
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trans_free(trans);
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return;
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case 0x306:
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release = 1;
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mo_cause = trans->cc.msg.cause.value;
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mo_location = trans->cc.msg.cause.location;
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break;
|
|
case 0x323:
|
|
disconnect = 1;
|
|
break;
|
|
default:
|
|
release = 1;
|
|
}
|
|
|
|
if (release && trans->callref) {
|
|
/* process release towards layer 4 */
|
|
mncc_release_ind(trans->net, trans, trans->callref,
|
|
l4_location, l4_cause);
|
|
trans->callref = 0;
|
|
}
|
|
|
|
if (disconnect && trans->callref) {
|
|
/* process disconnect towards layer 4 */
|
|
mncc_set_cause(&l4_rel, l4_location, l4_cause);
|
|
mncc_recvmsg(trans->net, trans, MNCC_DISC_IND, &l4_rel);
|
|
}
|
|
|
|
/* process disconnect towards mobile station */
|
|
if (disconnect || release) {
|
|
mncc_set_cause(&mo_rel, mo_location, mo_cause);
|
|
mo_rel.cause.diag[0] = ((trans->cc.Tcurrent & 0xf00) >> 8) + '0';
|
|
mo_rel.cause.diag[1] = ((trans->cc.Tcurrent & 0x0f0) >> 4) + '0';
|
|
mo_rel.cause.diag[2] = (trans->cc.Tcurrent & 0x00f) + '0';
|
|
mo_rel.cause.diag_len = 3;
|
|
|
|
if (disconnect)
|
|
gsm48_cc_tx_disconnect(trans, &mo_rel);
|
|
if (release)
|
|
gsm48_cc_tx_release(trans, &mo_rel);
|
|
}
|
|
|
|
}
|
|
|
|
/* disconnect both calls from the bridge */
|
|
static inline void disconnect_bridge(struct gsm_network *net,
|
|
const struct gsm_mncc_bridge *bridge, int err)
|
|
{
|
|
struct gsm_trans *trans0 = trans_find_by_callref(net, bridge->callref[0]);
|
|
struct gsm_trans *trans1 = trans_find_by_callref(net, bridge->callref[1]);
|
|
struct gsm_mncc mx_rel;
|
|
if (!trans0 || !trans1)
|
|
return;
|
|
|
|
LOG_TRANS(trans0, LOGL_ERROR, "Failed to bridge TCH for calls %x <-> %x :: %s \n",
|
|
trans0->callref, trans1->callref, strerror(err));
|
|
LOG_TRANS(trans1, LOGL_ERROR, "Failed to bridge TCH for calls %x <-> %x :: %s \n",
|
|
trans0->callref, trans1->callref, strerror(err));
|
|
|
|
memset(&mx_rel, 0, sizeof(struct gsm_mncc));
|
|
mncc_set_cause(&mx_rel, GSM48_CAUSE_LOC_INN_NET,
|
|
GSM48_CC_CAUSE_CHAN_UNACCEPT);
|
|
|
|
mx_rel.callref = trans0->callref;
|
|
gsm48_cc_tx_disconnect(trans0, &mx_rel);
|
|
|
|
mx_rel.callref = trans1->callref;
|
|
gsm48_cc_tx_disconnect(trans1, &mx_rel);
|
|
}
|
|
|
|
static void gsm48_start_cc_timer(struct gsm_trans *trans, int current,
|
|
int sec, int micro)
|
|
{
|
|
LOG_TRANS(trans, LOGL_DEBUG, "starting timer T%x with %d seconds\n", current, sec);
|
|
osmo_timer_setup(&trans->cc.timer, gsm48_cc_timeout, trans);
|
|
osmo_timer_schedule(&trans->cc.timer, sec, micro);
|
|
trans->cc.Tcurrent = current;
|
|
}
|
|
|
|
static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
uint8_t msg_type = gsm48_hdr_msg_type(gh);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc setup;
|
|
|
|
gsm48_start_guard_timer(trans);
|
|
|
|
memset(&setup, 0, sizeof(struct gsm_mncc));
|
|
setup.callref = trans->callref;
|
|
|
|
/* New Global Call Reference */
|
|
if (!trans->cc.lcls)
|
|
trans->cc.lcls = trans_lcls_compose(trans, true);
|
|
|
|
/* Pass the LCLS GCR on to the MT call leg via MNCC */
|
|
if (trans->cc.lcls) {
|
|
struct msgb *gcr_msg = msgb_alloc(sizeof(setup.gcr), "MNCC GCR");
|
|
const struct osmo_gcr_parsed *gcr = &trans->cc.lcls->gcr;
|
|
int rc;
|
|
|
|
if (gcr_msg != NULL && (rc = osmo_enc_gcr(gcr_msg, gcr)) > 0) {
|
|
memcpy(&setup.gcr[0], gcr_msg->data, rc);
|
|
setup.fields |= MNCC_F_GCR;
|
|
} else
|
|
LOG_TRANS(trans, LOGL_ERROR, "Failed to encode GCR\n");
|
|
msgb_free(gcr_msg);
|
|
}
|
|
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
|
|
/* emergency setup is identified by msg_type */
|
|
if (msg_type == GSM48_MT_CC_EMERG_SETUP) {
|
|
setup.fields |= MNCC_F_EMERGENCY;
|
|
setup.emergency = 1;
|
|
/* use destination number as configured by user (if any) */
|
|
if (trans->net->emergency.route_to_msisdn) {
|
|
setup.fields |= MNCC_F_CALLED;
|
|
setup.called.type = 0; /* unknown */
|
|
setup.called.plan = 0; /* unknown */
|
|
OSMO_STRLCPY_ARRAY(setup.called.number,
|
|
trans->net->emergency.route_to_msisdn);
|
|
}
|
|
}
|
|
|
|
/* use subscriber as calling party number */
|
|
setup.fields |= MNCC_F_CALLING;
|
|
OSMO_STRLCPY_ARRAY(setup.calling.number, trans->vsub->msisdn);
|
|
OSMO_STRLCPY_ARRAY(setup.imsi, trans->vsub->imsi);
|
|
|
|
/* bearer capability */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
|
|
setup.fields |= MNCC_F_BEARER_CAP;
|
|
gsm48_decode_bearer_cap(&setup.bearer_cap,
|
|
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
|
|
|
|
/* Create a copy of the bearer capability
|
|
* in the transaction struct, so we can use
|
|
* this information later */
|
|
memcpy(&trans->bearer_cap, &setup.bearer_cap,
|
|
sizeof(trans->bearer_cap));
|
|
}
|
|
/* facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
|
|
setup.fields |= MNCC_F_FACILITY;
|
|
gsm48_decode_facility(&setup.facility,
|
|
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
|
|
}
|
|
/* called party bcd number */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CALLED_BCD)) {
|
|
setup.fields |= MNCC_F_CALLED;
|
|
gsm48_decode_called(&setup.called,
|
|
TLVP_VAL(&tp, GSM48_IE_CALLED_BCD)-1);
|
|
}
|
|
/* user-user */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
|
|
setup.fields |= MNCC_F_USERUSER;
|
|
gsm48_decode_useruser(&setup.useruser,
|
|
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
|
|
}
|
|
/* ss-version */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) {
|
|
setup.fields |= MNCC_F_SSVERSION;
|
|
gsm48_decode_ssversion(&setup.ssversion,
|
|
TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
|
|
}
|
|
/* CLIR suppression */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CLIR_SUPP))
|
|
setup.clir.sup = 1;
|
|
/* CLIR invocation */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CLIR_INVOC))
|
|
setup.clir.inv = 1;
|
|
/* cc cap */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CC_CAP)) {
|
|
setup.fields |= MNCC_F_CCCAP;
|
|
gsm48_decode_cccap(&setup.cccap,
|
|
TLVP_VAL(&tp, GSM48_IE_CC_CAP)-1);
|
|
}
|
|
|
|
new_cc_state(trans, GSM_CSTATE_INITIATED);
|
|
|
|
LOG_TRANS(trans, setup.emergency ? LOGL_NOTICE : LOGL_INFO, "%sSETUP to %s\n",
|
|
setup.emergency ? "EMERGENCY_" : "", setup.called.number);
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(trans->net->msc_ctrs, MSC_CTR_CALL_MO_SETUP));
|
|
|
|
/* indicate setup to MNCC */
|
|
mncc_recvmsg(trans->net, trans, MNCC_SETUP_IND, &setup);
|
|
|
|
/* MNCC code will modify the channel asynchronously, we should
|
|
* ipaccess-bind only after the modification has been made to the
|
|
* lchan->tch_mode */
|
|
return 0;
|
|
}
|
|
|
|
static int gsm48_cc_tx_setup(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC STUP");
|
|
struct gsm48_hdr *gh;
|
|
struct gsm_mncc *setup = arg;
|
|
int rc, trans_id;
|
|
|
|
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
/* transaction id must not be assigned */
|
|
if (trans->transaction_id != TRANS_ID_UNASSIGNED) {
|
|
LOG_TRANS(trans, LOGL_DEBUG, "TX Setup with assigned transaction. "
|
|
"This is not allowed!\n");
|
|
/* Temporarily out of order */
|
|
rc = mncc_release_ind(trans->net, trans, trans->callref,
|
|
GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
|
|
trans->callref = 0;
|
|
trans_free(trans);
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
|
|
/* Get free transaction_id */
|
|
trans_id = trans_assign_trans_id(trans->net, trans->vsub, TRANS_CC);
|
|
if (trans_id < 0) {
|
|
/* no free transaction ID */
|
|
rc = mncc_release_ind(trans->net, trans, trans->callref,
|
|
GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
|
|
trans->callref = 0;
|
|
trans_free(trans);
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
trans->transaction_id = trans_id;
|
|
|
|
gh->msg_type = GSM48_MT_CC_SETUP;
|
|
|
|
gsm48_start_cc_timer(trans, 0x303, GSM48_T303);
|
|
|
|
/* bearer capability */
|
|
if (setup->fields & MNCC_F_BEARER_CAP) {
|
|
/* Create a copy of the bearer capability in the transaction struct, so we
|
|
* can use this information later */
|
|
memcpy(&trans->bearer_cap, &setup->bearer_cap, sizeof(trans->bearer_cap));
|
|
gsm48_encode_bearer_cap(msg, 0, &setup->bearer_cap);
|
|
}
|
|
/* facility */
|
|
if (setup->fields & MNCC_F_FACILITY)
|
|
gsm48_encode_facility(msg, 0, &setup->facility);
|
|
/* progress */
|
|
if (setup->fields & MNCC_F_PROGRESS)
|
|
gsm48_encode_progress(msg, 0, &setup->progress);
|
|
/* calling party BCD number */
|
|
if (setup->fields & MNCC_F_CALLING)
|
|
gsm48_encode_calling(msg, &setup->calling);
|
|
/* called party BCD number */
|
|
if (setup->fields & MNCC_F_CALLED)
|
|
gsm48_encode_called(msg, &setup->called);
|
|
/* user-user */
|
|
if (setup->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 0, &setup->useruser);
|
|
/* redirecting party BCD number */
|
|
if (setup->fields & MNCC_F_REDIRECTING)
|
|
gsm48_encode_redirecting(msg, &setup->redirecting);
|
|
/* signal */
|
|
if (setup->fields & MNCC_F_SIGNAL)
|
|
gsm48_encode_signal(msg, setup->signal);
|
|
|
|
new_cc_state(trans, GSM_CSTATE_CALL_PRESENT);
|
|
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(trans->net->msc_ctrs, MSC_CTR_CALL_MT_SETUP));
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_call_conf(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc call_conf;
|
|
int rc;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
gsm48_start_cc_timer(trans, 0x310, GSM48_T310);
|
|
|
|
memset(&call_conf, 0, sizeof(struct gsm_mncc));
|
|
call_conf.callref = trans->callref;
|
|
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
|
|
#if 0
|
|
/* repeat */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_REPEAT_CIR))
|
|
call_conf.repeat = 1;
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_REPEAT_SEQ))
|
|
call_conf.repeat = 2;
|
|
#endif
|
|
/* bearer capability */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
|
|
call_conf.fields |= MNCC_F_BEARER_CAP;
|
|
gsm48_decode_bearer_cap(&call_conf.bearer_cap,
|
|
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
|
|
|
|
/* Create a copy of the bearer capability
|
|
* in the transaction struct, so we can use
|
|
* this information later */
|
|
memcpy(&trans->bearer_cap,&call_conf.bearer_cap,
|
|
sizeof(trans->bearer_cap));
|
|
}
|
|
/* cause */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
|
|
call_conf.fields |= MNCC_F_CAUSE;
|
|
gsm48_decode_cause(&call_conf.cause,
|
|
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
|
|
}
|
|
/* cc cap */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CC_CAP)) {
|
|
call_conf.fields |= MNCC_F_CCCAP;
|
|
gsm48_decode_cccap(&call_conf.cccap,
|
|
TLVP_VAL(&tp, GSM48_IE_CC_CAP)-1);
|
|
}
|
|
|
|
/* IMSI of called subscriber */
|
|
OSMO_STRLCPY_ARRAY(call_conf.imsi, trans->vsub->imsi);
|
|
|
|
new_cc_state(trans, GSM_CSTATE_MO_TERM_CALL_CONF);
|
|
|
|
/* Assign call (if not done yet) */
|
|
rc = msc_a_try_call_assignment(trans);
|
|
|
|
/* don't continue, if there were problems with
|
|
* the call assignment. */
|
|
if (rc)
|
|
return rc;
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_CALL_CONF_IND,
|
|
&call_conf);
|
|
}
|
|
|
|
static int gsm48_cc_tx_call_proc_and_assign(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *proceeding = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC PROC");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
int rc;
|
|
|
|
gh->msg_type = GSM48_MT_CC_CALL_PROC;
|
|
|
|
new_cc_state(trans, GSM_CSTATE_MO_CALL_PROC);
|
|
|
|
/* bearer capability */
|
|
if (proceeding->fields & MNCC_F_BEARER_CAP) {
|
|
gsm48_encode_bearer_cap(msg, 0, &proceeding->bearer_cap);
|
|
memcpy(&trans->bearer_cap, &proceeding->bearer_cap, sizeof(trans->bearer_cap));
|
|
}
|
|
/* facility */
|
|
if (proceeding->fields & MNCC_F_FACILITY)
|
|
gsm48_encode_facility(msg, 0, &proceeding->facility);
|
|
/* progress */
|
|
if (proceeding->fields & MNCC_F_PROGRESS)
|
|
gsm48_encode_progress(msg, 0, &proceeding->progress);
|
|
|
|
rc = trans_tx_gsm48(trans, msg);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Assign call (if not done yet) */
|
|
return msc_a_try_call_assignment(trans);
|
|
}
|
|
|
|
static int gsm48_cc_rx_alerting(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc alerting;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
gsm48_start_cc_timer(trans, 0x301, GSM48_T301);
|
|
|
|
memset(&alerting, 0, sizeof(struct gsm_mncc));
|
|
alerting.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
|
|
/* facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
|
|
alerting.fields |= MNCC_F_FACILITY;
|
|
gsm48_decode_facility(&alerting.facility,
|
|
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
|
|
}
|
|
|
|
/* progress */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) {
|
|
alerting.fields |= MNCC_F_PROGRESS;
|
|
gsm48_decode_progress(&alerting.progress,
|
|
TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1);
|
|
}
|
|
/* ss-version */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) {
|
|
alerting.fields |= MNCC_F_SSVERSION;
|
|
gsm48_decode_ssversion(&alerting.ssversion,
|
|
TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
|
|
}
|
|
|
|
new_cc_state(trans, GSM_CSTATE_CALL_RECEIVED);
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_ALERT_IND,
|
|
&alerting);
|
|
}
|
|
|
|
static int gsm48_cc_tx_alerting(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *alerting = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC ALERT");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_ALERTING;
|
|
|
|
/* facility */
|
|
if (alerting->fields & MNCC_F_FACILITY)
|
|
gsm48_encode_facility(msg, 0, &alerting->facility);
|
|
/* progress */
|
|
if (alerting->fields & MNCC_F_PROGRESS)
|
|
gsm48_encode_progress(msg, 0, &alerting->progress);
|
|
/* user-user */
|
|
if (alerting->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 0, &alerting->useruser);
|
|
|
|
new_cc_state(trans, GSM_CSTATE_CALL_DELIVERED);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_tx_progress(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *progress = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC PROGRESS");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_PROGRESS;
|
|
|
|
/* progress */
|
|
gsm48_encode_progress(msg, 1, &progress->progress);
|
|
/* user-user */
|
|
if (progress->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 0, &progress->useruser);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_tx_connect(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *connect = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSN 04.08 CC CON");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_CONNECT;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
gsm48_start_cc_timer(trans, 0x313, GSM48_T313);
|
|
|
|
/* facility */
|
|
if (connect->fields & MNCC_F_FACILITY)
|
|
gsm48_encode_facility(msg, 0, &connect->facility);
|
|
/* progress */
|
|
if (connect->fields & MNCC_F_PROGRESS)
|
|
gsm48_encode_progress(msg, 0, &connect->progress);
|
|
/* connected number */
|
|
if (connect->fields & MNCC_F_CONNECTED)
|
|
gsm48_encode_connected(msg, &connect->connected);
|
|
/* user-user */
|
|
if (connect->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 0, &connect->useruser);
|
|
|
|
new_cc_state(trans, GSM_CSTATE_CONNECT_IND);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_connect(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc connect;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
memset(&connect, 0, sizeof(struct gsm_mncc));
|
|
connect.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
|
|
/* use subscriber as connected party number */
|
|
connect.fields |= MNCC_F_CONNECTED;
|
|
OSMO_STRLCPY_ARRAY(connect.connected.number, trans->vsub->msisdn);
|
|
OSMO_STRLCPY_ARRAY(connect.imsi, trans->vsub->imsi);
|
|
|
|
/* facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
|
|
connect.fields |= MNCC_F_FACILITY;
|
|
gsm48_decode_facility(&connect.facility,
|
|
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
|
|
}
|
|
/* user-user */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
|
|
connect.fields |= MNCC_F_USERUSER;
|
|
gsm48_decode_useruser(&connect.useruser,
|
|
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
|
|
}
|
|
/* ss-version */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) {
|
|
connect.fields |= MNCC_F_SSVERSION;
|
|
gsm48_decode_ssversion(&connect.ssversion,
|
|
TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
|
|
}
|
|
|
|
new_cc_state(trans, GSM_CSTATE_CONNECT_REQUEST);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(trans->net->msc_ctrs, MSC_CTR_CALL_MT_CONNECT));
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_SETUP_CNF, &connect);
|
|
}
|
|
|
|
|
|
static int gsm48_cc_rx_connect_ack(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm_mncc connect_ack;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
new_cc_state(trans, GSM_CSTATE_ACTIVE);
|
|
rate_ctr_inc(rate_ctr_group_get_ctr(trans->net->msc_ctrs, MSC_CTR_CALL_MO_CONNECT_ACK));
|
|
|
|
memset(&connect_ack, 0, sizeof(struct gsm_mncc));
|
|
connect_ack.callref = trans->callref;
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_SETUP_COMPL_IND,
|
|
&connect_ack);
|
|
}
|
|
|
|
static int gsm48_cc_tx_connect_ack(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC CON ACK");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_CONNECT_ACK;
|
|
|
|
new_cc_state(trans, GSM_CSTATE_ACTIVE);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_disconnect(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc disc;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
new_cc_state(trans, GSM_CSTATE_DISCONNECT_REQ);
|
|
|
|
memset(&disc, 0, sizeof(struct gsm_mncc));
|
|
disc.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_CAUSE, 0);
|
|
/* cause */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
|
|
disc.fields |= MNCC_F_CAUSE;
|
|
gsm48_decode_cause(&disc.cause,
|
|
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
|
|
}
|
|
/* facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
|
|
disc.fields |= MNCC_F_FACILITY;
|
|
gsm48_decode_facility(&disc.facility,
|
|
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
|
|
}
|
|
/* user-user */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
|
|
disc.fields |= MNCC_F_USERUSER;
|
|
gsm48_decode_useruser(&disc.useruser,
|
|
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
|
|
}
|
|
/* ss-version */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) {
|
|
disc.fields |= MNCC_F_SSVERSION;
|
|
gsm48_decode_ssversion(&disc.ssversion,
|
|
TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
|
|
}
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_DISC_IND, &disc);
|
|
}
|
|
|
|
static struct gsm_mncc_cause default_cause = {
|
|
.location = GSM48_CAUSE_LOC_PRN_S_LU,
|
|
.coding = 0,
|
|
.rec = 0,
|
|
.rec_val = 0,
|
|
.value = GSM48_CC_CAUSE_NORMAL_UNSPEC,
|
|
.diag_len = 0,
|
|
.diag = { 0 },
|
|
};
|
|
|
|
static int gsm48_cc_tx_disconnect(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *disc = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC DISC");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_DISCONNECT;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
gsm48_start_cc_timer(trans, 0x306, GSM48_T306);
|
|
|
|
/* cause */
|
|
if (disc->fields & MNCC_F_CAUSE)
|
|
gsm48_encode_cause(msg, 1, &disc->cause);
|
|
else
|
|
gsm48_encode_cause(msg, 1, &default_cause);
|
|
|
|
/* facility */
|
|
if (disc->fields & MNCC_F_FACILITY)
|
|
gsm48_encode_facility(msg, 0, &disc->facility);
|
|
/* progress */
|
|
if (disc->fields & MNCC_F_PROGRESS)
|
|
gsm48_encode_progress(msg, 0, &disc->progress);
|
|
/* user-user */
|
|
if (disc->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 0, &disc->useruser);
|
|
|
|
/* store disconnect cause for T306 expiry */
|
|
memcpy(&trans->cc.msg, disc, sizeof(struct gsm_mncc));
|
|
|
|
new_cc_state(trans, GSM_CSTATE_DISCONNECT_IND);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_release(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc rel;
|
|
int rc;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
memset(&rel, 0, sizeof(struct gsm_mncc));
|
|
rel.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
|
|
/* cause */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
|
|
rel.fields |= MNCC_F_CAUSE;
|
|
gsm48_decode_cause(&rel.cause,
|
|
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
|
|
}
|
|
/* facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
|
|
rel.fields |= MNCC_F_FACILITY;
|
|
gsm48_decode_facility(&rel.facility,
|
|
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
|
|
}
|
|
/* user-user */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
|
|
rel.fields |= MNCC_F_USERUSER;
|
|
gsm48_decode_useruser(&rel.useruser,
|
|
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
|
|
}
|
|
/* ss-version */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) {
|
|
rel.fields |= MNCC_F_SSVERSION;
|
|
gsm48_decode_ssversion(&rel.ssversion,
|
|
TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
|
|
}
|
|
|
|
if (trans->cc.state == GSM_CSTATE_RELEASE_REQ) {
|
|
/* release collision 5.4.5 */
|
|
rc = mncc_recvmsg(trans->net, trans, MNCC_REL_CNF, &rel);
|
|
} else {
|
|
rc = gsm48_tx_simple(trans->msc_a,
|
|
GSM48_PDISC_CC | (trans->transaction_id << 4),
|
|
GSM48_MT_CC_RELEASE_COMPL);
|
|
rc = mncc_recvmsg(trans->net, trans, MNCC_REL_IND, &rel);
|
|
}
|
|
|
|
new_cc_state(trans, GSM_CSTATE_NULL);
|
|
|
|
trans->callref = 0;
|
|
trans_free(trans);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int gsm48_cc_tx_release(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *rel = arg;
|
|
struct msgb *msg;
|
|
struct gsm48_hdr *gh;
|
|
|
|
if (!trans->msc_a) {
|
|
LOG_TRANS(trans, LOGL_DEBUG, "Cannot send CC REL, there is no MSC-A connection\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
msg = gsm48_msgb_alloc_name("GSM 04.08 CC REL");
|
|
gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_RELEASE;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
gsm48_start_cc_timer(trans, 0x308, GSM48_T308);
|
|
|
|
/* cause */
|
|
if (rel->fields & MNCC_F_CAUSE)
|
|
gsm48_encode_cause(msg, 0, &rel->cause);
|
|
/* facility */
|
|
if (rel->fields & MNCC_F_FACILITY)
|
|
gsm48_encode_facility(msg, 0, &rel->facility);
|
|
/* user-user */
|
|
if (rel->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 0, &rel->useruser);
|
|
|
|
trans->cc.T308_second = 0;
|
|
memcpy(&trans->cc.msg, rel, sizeof(struct gsm_mncc));
|
|
|
|
if (trans->cc.state != GSM_CSTATE_RELEASE_REQ)
|
|
new_cc_state(trans, GSM_CSTATE_RELEASE_REQ);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_release_compl(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc rel;
|
|
int rc = 0;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
memset(&rel, 0, sizeof(struct gsm_mncc));
|
|
rel.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
|
|
/* cause */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
|
|
rel.fields |= MNCC_F_CAUSE;
|
|
gsm48_decode_cause(&rel.cause,
|
|
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
|
|
}
|
|
/* facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
|
|
rel.fields |= MNCC_F_FACILITY;
|
|
gsm48_decode_facility(&rel.facility,
|
|
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
|
|
}
|
|
/* user-user */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
|
|
rel.fields |= MNCC_F_USERUSER;
|
|
gsm48_decode_useruser(&rel.useruser,
|
|
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
|
|
}
|
|
/* ss-version */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) {
|
|
rel.fields |= MNCC_F_SSVERSION;
|
|
gsm48_decode_ssversion(&rel.ssversion,
|
|
TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
|
|
}
|
|
|
|
if (trans->callref) {
|
|
switch (trans->cc.state) {
|
|
case GSM_CSTATE_CALL_PRESENT:
|
|
rc = mncc_recvmsg(trans->net, trans,
|
|
MNCC_REJ_IND, &rel);
|
|
break;
|
|
case GSM_CSTATE_RELEASE_REQ:
|
|
rc = mncc_recvmsg(trans->net, trans,
|
|
MNCC_REL_CNF, &rel);
|
|
break;
|
|
default:
|
|
rc = mncc_recvmsg(trans->net, trans,
|
|
MNCC_REL_IND, &rel);
|
|
}
|
|
}
|
|
|
|
trans->callref = 0;
|
|
trans_free(trans);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int gsm48_cc_tx_release_compl(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *rel = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC REL COMPL");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
int ret;
|
|
|
|
gh->msg_type = GSM48_MT_CC_RELEASE_COMPL;
|
|
|
|
trans->callref = 0;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
/* cause */
|
|
if (rel->fields & MNCC_F_CAUSE)
|
|
gsm48_encode_cause(msg, 0, &rel->cause);
|
|
/* facility */
|
|
if (rel->fields & MNCC_F_FACILITY)
|
|
gsm48_encode_facility(msg, 0, &rel->facility);
|
|
/* user-user */
|
|
if (rel->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 0, &rel->useruser);
|
|
|
|
ret = trans_tx_gsm48(trans, msg);
|
|
|
|
trans_free(trans);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int gsm48_cc_rx_facility(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc fac;
|
|
|
|
memset(&fac, 0, sizeof(struct gsm_mncc));
|
|
fac.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_FACILITY, 0);
|
|
/* facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
|
|
fac.fields |= MNCC_F_FACILITY;
|
|
gsm48_decode_facility(&fac.facility,
|
|
TLVP_VAL(&tp, GSM48_IE_FACILITY)-1);
|
|
}
|
|
/* ss-version */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) {
|
|
fac.fields |= MNCC_F_SSVERSION;
|
|
gsm48_decode_ssversion(&fac.ssversion,
|
|
TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1);
|
|
}
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_FACILITY_IND, &fac);
|
|
}
|
|
|
|
static int gsm48_cc_tx_facility(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *fac = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC FAC");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_FACILITY;
|
|
|
|
/* facility */
|
|
gsm48_encode_facility(msg, 1, &fac->facility);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_hold(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm_mncc hold;
|
|
|
|
memset(&hold, 0, sizeof(struct gsm_mncc));
|
|
hold.callref = trans->callref;
|
|
return mncc_recvmsg(trans->net, trans, MNCC_HOLD_IND, &hold);
|
|
}
|
|
|
|
static int gsm48_cc_tx_hold_ack(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC HLD ACK");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_HOLD_ACK;
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_tx_hold_rej(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *hold_rej = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC HLD REJ");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_HOLD_REJ;
|
|
|
|
/* cause */
|
|
if (hold_rej->fields & MNCC_F_CAUSE)
|
|
gsm48_encode_cause(msg, 1, &hold_rej->cause);
|
|
else
|
|
gsm48_encode_cause(msg, 1, &default_cause);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_retrieve(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm_mncc retrieve;
|
|
|
|
memset(&retrieve, 0, sizeof(struct gsm_mncc));
|
|
retrieve.callref = trans->callref;
|
|
return mncc_recvmsg(trans->net, trans, MNCC_RETRIEVE_IND,
|
|
&retrieve);
|
|
}
|
|
|
|
static int gsm48_cc_tx_retrieve_ack(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC RETR ACK");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_RETR_ACK;
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_tx_retrieve_rej(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *retrieve_rej = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC RETR REJ");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_RETR_REJ;
|
|
|
|
/* cause */
|
|
if (retrieve_rej->fields & MNCC_F_CAUSE)
|
|
gsm48_encode_cause(msg, 1, &retrieve_rej->cause);
|
|
else
|
|
gsm48_encode_cause(msg, 1, &default_cause);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_start_dtmf(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc dtmf;
|
|
|
|
memset(&dtmf, 0, sizeof(struct gsm_mncc));
|
|
dtmf.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0);
|
|
/* keypad facility */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_KPD_FACILITY)) {
|
|
dtmf.fields |= MNCC_F_KEYPAD;
|
|
gsm48_decode_keypad(&dtmf.keypad,
|
|
TLVP_VAL(&tp, GSM48_IE_KPD_FACILITY)-1);
|
|
}
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_START_DTMF_IND, &dtmf);
|
|
}
|
|
|
|
static int gsm48_cc_tx_start_dtmf_ack(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *dtmf = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DTMF ACK");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_START_DTMF_ACK;
|
|
|
|
/* keypad */
|
|
if (dtmf->fields & MNCC_F_KEYPAD)
|
|
gsm48_encode_keypad(msg, dtmf->keypad);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_tx_start_dtmf_rej(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *dtmf = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DTMF REJ");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_START_DTMF_REJ;
|
|
|
|
/* cause */
|
|
if (dtmf->fields & MNCC_F_CAUSE)
|
|
gsm48_encode_cause(msg, 1, &dtmf->cause);
|
|
else
|
|
gsm48_encode_cause(msg, 1, &default_cause);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_tx_stop_dtmf_ack(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DTMF STP ACK");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_STOP_DTMF_ACK;
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_stop_dtmf(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm_mncc dtmf;
|
|
|
|
memset(&dtmf, 0, sizeof(struct gsm_mncc));
|
|
dtmf.callref = trans->callref;
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_STOP_DTMF_IND, &dtmf);
|
|
}
|
|
|
|
static int gsm48_cc_rx_modify(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc modify;
|
|
|
|
memset(&modify, 0, sizeof(struct gsm_mncc));
|
|
modify.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_BEARER_CAP, 0);
|
|
/* bearer capability */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
|
|
modify.fields |= MNCC_F_BEARER_CAP;
|
|
gsm48_decode_bearer_cap(&modify.bearer_cap,
|
|
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
|
|
|
|
/* Create a copy of the bearer capability
|
|
* in the transaction struct, so we can use
|
|
* this information later */
|
|
memcpy(&trans->bearer_cap,&modify.bearer_cap,
|
|
sizeof(trans->bearer_cap));
|
|
}
|
|
|
|
new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY);
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_MODIFY_IND, &modify);
|
|
}
|
|
|
|
static int gsm48_cc_tx_modify(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *modify = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC MOD");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_MODIFY;
|
|
|
|
gsm48_start_cc_timer(trans, 0x323, GSM48_T323);
|
|
|
|
/* bearer capability */
|
|
gsm48_encode_bearer_cap(msg, 1, &modify->bearer_cap);
|
|
memcpy(&trans->bearer_cap, &modify->bearer_cap, sizeof(trans->bearer_cap));
|
|
|
|
new_cc_state(trans, GSM_CSTATE_MO_TERM_MODIFY);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_modify_complete(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc modify;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
memset(&modify, 0, sizeof(struct gsm_mncc));
|
|
modify.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_BEARER_CAP, 0);
|
|
/* bearer capability */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
|
|
modify.fields |= MNCC_F_BEARER_CAP;
|
|
gsm48_decode_bearer_cap(&modify.bearer_cap,
|
|
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
|
|
|
|
/* Create a copy of the bearer capability
|
|
* in the transaction struct, so we can use
|
|
* this information later */
|
|
memcpy(&trans->bearer_cap,&modify.bearer_cap,
|
|
sizeof(trans->bearer_cap));
|
|
}
|
|
|
|
new_cc_state(trans, GSM_CSTATE_ACTIVE);
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_MODIFY_CNF, &modify);
|
|
}
|
|
|
|
static int gsm48_cc_tx_modify_complete(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *modify = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC MOD COMPL");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_MODIFY_COMPL;
|
|
|
|
/* bearer capability */
|
|
gsm48_encode_bearer_cap(msg, 1, &modify->bearer_cap);
|
|
memcpy(&trans->bearer_cap, &modify->bearer_cap, sizeof(trans->bearer_cap));
|
|
|
|
new_cc_state(trans, GSM_CSTATE_ACTIVE);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_modify_reject(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc modify;
|
|
|
|
gsm48_stop_cc_timer(trans);
|
|
|
|
memset(&modify, 0, sizeof(struct gsm_mncc));
|
|
modify.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_BEARER_CAP, GSM48_IE_CAUSE);
|
|
/* bearer capability */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
|
|
modify.fields |= GSM48_IE_BEARER_CAP;
|
|
gsm48_decode_bearer_cap(&modify.bearer_cap,
|
|
TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1);
|
|
|
|
/* Create a copy of the bearer capability
|
|
* in the transaction struct, so we can use
|
|
* this information later */
|
|
memcpy(&trans->bearer_cap,&modify.bearer_cap,
|
|
sizeof(trans->bearer_cap));
|
|
}
|
|
/* cause */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) {
|
|
modify.fields |= MNCC_F_CAUSE;
|
|
gsm48_decode_cause(&modify.cause,
|
|
TLVP_VAL(&tp, GSM48_IE_CAUSE)-1);
|
|
}
|
|
|
|
new_cc_state(trans, GSM_CSTATE_ACTIVE);
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_MODIFY_REJ, &modify);
|
|
}
|
|
|
|
static int gsm48_cc_tx_modify_reject(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *modify = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC MOD REJ");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_MODIFY_REJECT;
|
|
|
|
/* bearer capability */
|
|
gsm48_encode_bearer_cap(msg, 1, &modify->bearer_cap);
|
|
memcpy(&trans->bearer_cap, &modify->bearer_cap, sizeof(trans->bearer_cap));
|
|
/* cause */
|
|
gsm48_encode_cause(msg, 1, &modify->cause);
|
|
|
|
new_cc_state(trans, GSM_CSTATE_ACTIVE);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_tx_notify(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *notify = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC NOT");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_NOTIFY;
|
|
|
|
/* notify */
|
|
gsm48_encode_notify(msg, notify->notify);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_notify(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
// struct tlv_parsed tp;
|
|
struct gsm_mncc notify;
|
|
|
|
memset(¬ify, 0, sizeof(struct gsm_mncc));
|
|
notify.callref = trans->callref;
|
|
// tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len);
|
|
if (payload_len >= 1)
|
|
gsm48_decode_notify(¬ify.notify, gh->data);
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_NOTIFY_IND, ¬ify);
|
|
}
|
|
|
|
static int gsm48_cc_tx_userinfo(struct gsm_trans *trans, void *arg)
|
|
{
|
|
struct gsm_mncc *user = arg;
|
|
struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 USR INFO");
|
|
struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
|
|
|
|
gh->msg_type = GSM48_MT_CC_USER_INFO;
|
|
|
|
/* user-user */
|
|
if (user->fields & MNCC_F_USERUSER)
|
|
gsm48_encode_useruser(msg, 1, &user->useruser);
|
|
/* more data */
|
|
if (user->more)
|
|
gsm48_encode_more(msg);
|
|
|
|
return trans_tx_gsm48(trans, msg);
|
|
}
|
|
|
|
static int gsm48_cc_rx_userinfo(struct gsm_trans *trans, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh);
|
|
struct tlv_parsed tp;
|
|
struct gsm_mncc user;
|
|
|
|
memset(&user, 0, sizeof(struct gsm_mncc));
|
|
user.callref = trans->callref;
|
|
tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_USER_USER, 0);
|
|
/* user-user */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
|
|
user.fields |= MNCC_F_USERUSER;
|
|
gsm48_decode_useruser(&user.useruser,
|
|
TLVP_VAL(&tp, GSM48_IE_USER_USER)-1);
|
|
}
|
|
/* more data */
|
|
if (TLVP_PRESENT(&tp, GSM48_IE_MORE_DATA))
|
|
user.more = 1;
|
|
|
|
return mncc_recvmsg(trans->net, trans, MNCC_USERINFO_IND, &user);
|
|
}
|
|
|
|
static int mncc_recv_rtp(struct gsm_network *net, struct gsm_trans *trans, uint32_t callref,
|
|
int cmd, struct osmo_sockaddr_str *rtp_addr, uint32_t payload_type,
|
|
uint32_t payload_msg_type)
|
|
{
|
|
uint8_t data[sizeof(struct gsm_mncc)];
|
|
struct gsm_mncc_rtp *rtp;
|
|
|
|
memset(&data, 0, sizeof(data));
|
|
rtp = (struct gsm_mncc_rtp *) &data[0];
|
|
|
|
rtp->callref = callref;
|
|
rtp->msg_type = cmd;
|
|
if (rtp_addr) {
|
|
if (osmo_sockaddr_str_to_sockaddr(rtp_addr, &rtp->addr) < 0)
|
|
return -EINVAL;
|
|
}
|
|
rtp->payload_type = payload_type;
|
|
rtp->payload_msg_type = payload_msg_type;
|
|
return mncc_recvmsg(net, trans, cmd, (struct gsm_mncc *)data);
|
|
}
|
|
|
|
static void mncc_recv_rtp_err(struct gsm_network *net, struct gsm_trans *trans, uint32_t callref, int cmd)
|
|
{
|
|
mncc_recv_rtp(net, trans, callref, cmd, NULL, 0, 0);
|
|
}
|
|
|
|
static int tch_rtp_create(struct gsm_network *net, uint32_t callref)
|
|
{
|
|
struct gsm_trans *trans;
|
|
|
|
/* Find callref */
|
|
trans = trans_find_by_callref(net, callref);
|
|
if (!trans) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "RTP create for non-existing trans\n");
|
|
mncc_recv_rtp_err(net, trans, callref, MNCC_RTP_CREATE);
|
|
return -EIO;
|
|
}
|
|
log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub);
|
|
if (!trans->msc_a) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_NOTICE, "RTP create for trans without conn\n");
|
|
mncc_recv_rtp_err(net, trans, callref, MNCC_RTP_CREATE);
|
|
return 0;
|
|
}
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_DEBUG, "rx %s\n", get_mncc_name(MNCC_RTP_CREATE));
|
|
|
|
/* Assign call (if not done yet) */
|
|
return msc_a_try_call_assignment(trans);
|
|
}
|
|
|
|
/* Trigger TCH_RTP_CREATE acknowledgement */
|
|
int gsm48_tch_rtp_create(struct gsm_trans *trans)
|
|
{
|
|
/* This function is called as soon as the port, on which the
|
|
* mgcp-gw expects the incoming RTP stream from the remote
|
|
* end (e.g. Asterisk) is known. */
|
|
struct msc_a *msc_a = trans->msc_a;
|
|
struct gsm_network *net = msc_a_net(msc_a);
|
|
struct call_leg *cl = msc_a->cc.call_leg;
|
|
struct osmo_sockaddr_str *rtp_cn_local;
|
|
struct rtp_stream *rtp_cn = cl ? cl->rtp[RTP_TO_CN] : NULL;
|
|
uint32_t payload_type;
|
|
int payload_msg_type;
|
|
const struct mgcp_conn_peer *mgcp_info;
|
|
|
|
if (!rtp_cn) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "Cannot RTP CREATE to MNCC, no RTP set up for the CN side\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!rtp_cn->codec_known) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR,
|
|
"Cannot RTP CREATE to MNCC, no codec set up for the RTP CN side\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Codec */
|
|
payload_msg_type = mgcp_codec_to_mncc_payload_msg_type(rtp_cn->codec);
|
|
|
|
/* Payload Type number */
|
|
mgcp_info = osmo_mgcpc_ep_ci_get_rtp_info(rtp_cn->ci);
|
|
if (mgcp_info && mgcp_info->ptmap_len)
|
|
payload_type = map_codec_to_pt(mgcp_info->ptmap, mgcp_info->ptmap_len, rtp_cn->codec);
|
|
else
|
|
payload_type = rtp_cn->codec;
|
|
|
|
rtp_cn_local = call_leg_local_ip(cl, RTP_TO_CN);
|
|
if (!rtp_cn_local) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "Cannot RTP CREATE to MNCC, no local RTP IP:port set up\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return mncc_recv_rtp(net, trans, trans->callref, MNCC_RTP_CREATE, rtp_cn_local, payload_type, payload_msg_type);
|
|
}
|
|
|
|
static int tch_rtp_connect(struct gsm_network *net, const struct gsm_mncc_rtp *rtp)
|
|
{
|
|
struct gsm_trans *trans;
|
|
struct call_leg *cl;
|
|
struct rtp_stream *rtps;
|
|
struct osmo_sockaddr_str rtp_addr;
|
|
char ipbuf[INET6_ADDRSTRLEN];
|
|
|
|
/* FIXME: in *rtp we should get the codec information of the remote
|
|
* leg. We will have to populate trans->conn->rtp.codec_cn with a
|
|
* meaningful value based on this information but unfortunately we
|
|
* can't do that yet because the mncc API can not signal dynamic
|
|
* payload types yet. This must be fixed first. Also there may be
|
|
* additional members necessary in trans->conn->rtp because we
|
|
* somehow need to deal with dynamic payload types that do not
|
|
* comply to 3gpp's assumptions of payload type numbers on the A
|
|
* interface. See also related tickets: OS#3399 and OS1683 */
|
|
|
|
/* Find callref */
|
|
trans = trans_find_by_callref(net, rtp->callref);
|
|
if (!trans) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "RTP connect for non-existing trans\n");
|
|
mncc_recv_rtp_err(net, trans, rtp->callref, MNCC_RTP_CONNECT);
|
|
return -EIO;
|
|
}
|
|
log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub);
|
|
if (!trans->msc_a) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "RTP connect for trans without conn\n");
|
|
mncc_recv_rtp_err(net, trans, rtp->callref, MNCC_RTP_CONNECT);
|
|
return -EIO;
|
|
}
|
|
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_DEBUG, "rx %s %s:%u\n", get_mncc_name(MNCC_RTP_CONNECT),
|
|
osmo_sockaddr_ntop((const struct sockaddr*)&rtp->addr, ipbuf),
|
|
osmo_sockaddr_port((const struct sockaddr*)&rtp->addr));
|
|
|
|
cl = trans->msc_a->cc.call_leg;
|
|
rtps = cl ? cl->rtp[RTP_TO_CN] : NULL;
|
|
|
|
if (!rtps) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "RTP connect for trans without ongoing call\n");
|
|
mncc_recv_rtp_err(net, trans, rtp->callref, MNCC_RTP_CONNECT);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (osmo_sockaddr_str_from_sockaddr(&rtp_addr, &rtp->addr) < 0) {
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "RTP connect with invalid IP addr\n");
|
|
mncc_recv_rtp_err(net, trans, rtp->callref, MNCC_RTP_CONNECT);
|
|
return -EINVAL;
|
|
}
|
|
rtp_stream_set_remote_addr(rtps, &rtp_addr);
|
|
rtp_stream_commit(rtps);
|
|
return 0;
|
|
}
|
|
|
|
static struct downstate {
|
|
uint32_t states;
|
|
int type;
|
|
int (*rout) (struct gsm_trans *trans, void *arg);
|
|
} downstatelist[] = {
|
|
/* mobile originating call establishment */
|
|
{SBIT(GSM_CSTATE_INITIATED), /* 5.2.1.2 */
|
|
MNCC_CALL_PROC_REQ, gsm48_cc_tx_call_proc_and_assign},
|
|
{SBIT(GSM_CSTATE_INITIATED) | SBIT(GSM_CSTATE_MO_CALL_PROC), /* 5.2.1.2 | 5.2.1.5 */
|
|
MNCC_ALERT_REQ, gsm48_cc_tx_alerting},
|
|
{SBIT(GSM_CSTATE_INITIATED) | SBIT(GSM_CSTATE_MO_CALL_PROC) | SBIT(GSM_CSTATE_CALL_DELIVERED), /* 5.2.1.2 | 5.2.1.6 | 5.2.1.6 */
|
|
MNCC_SETUP_RSP, gsm48_cc_tx_connect},
|
|
{SBIT(GSM_CSTATE_MO_CALL_PROC), /* 5.2.1.4.2 */
|
|
MNCC_PROGRESS_REQ, gsm48_cc_tx_progress},
|
|
/* mobile terminating call establishment */
|
|
{SBIT(GSM_CSTATE_NULL), /* 5.2.2.1 */
|
|
MNCC_SETUP_REQ, gsm48_cc_tx_setup},
|
|
{SBIT(GSM_CSTATE_CONNECT_REQUEST),
|
|
MNCC_SETUP_COMPL_REQ, gsm48_cc_tx_connect_ack},
|
|
/* signalling during call */
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
MNCC_NOTIFY_REQ, gsm48_cc_tx_notify},
|
|
{ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ),
|
|
MNCC_FACILITY_REQ, gsm48_cc_tx_facility},
|
|
{ALL_STATES,
|
|
MNCC_START_DTMF_RSP, gsm48_cc_tx_start_dtmf_ack},
|
|
{ALL_STATES,
|
|
MNCC_START_DTMF_REJ, gsm48_cc_tx_start_dtmf_rej},
|
|
{ALL_STATES,
|
|
MNCC_STOP_DTMF_RSP, gsm48_cc_tx_stop_dtmf_ack},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
MNCC_HOLD_CNF, gsm48_cc_tx_hold_ack},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
MNCC_HOLD_REJ, gsm48_cc_tx_hold_rej},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
MNCC_RETRIEVE_CNF, gsm48_cc_tx_retrieve_ack},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
MNCC_RETRIEVE_REJ, gsm48_cc_tx_retrieve_rej},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
MNCC_MODIFY_REQ, gsm48_cc_tx_modify},
|
|
{SBIT(GSM_CSTATE_MO_ORIG_MODIFY),
|
|
MNCC_MODIFY_RSP, gsm48_cc_tx_modify_complete},
|
|
{SBIT(GSM_CSTATE_MO_ORIG_MODIFY),
|
|
MNCC_MODIFY_REJ, gsm48_cc_tx_modify_reject},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
MNCC_USERINFO_REQ, gsm48_cc_tx_userinfo},
|
|
/* clearing */
|
|
{SBIT(GSM_CSTATE_INITIATED),
|
|
MNCC_REJ_REQ, gsm48_cc_tx_release_compl},
|
|
{ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_DISCONNECT_IND) - SBIT(GSM_CSTATE_RELEASE_REQ) - SBIT(GSM_CSTATE_DISCONNECT_REQ), /* 5.4.4 */
|
|
MNCC_DISC_REQ, gsm48_cc_tx_disconnect},
|
|
{ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ), /* 5.4.3.2 */
|
|
MNCC_REL_REQ, gsm48_cc_tx_release},
|
|
};
|
|
|
|
#define DOWNSLLEN \
|
|
(sizeof(downstatelist) / sizeof(struct downstate))
|
|
|
|
|
|
static int mncc_tx_to_gsm_cc(struct gsm_network *net, const union mncc_msg *msg)
|
|
{
|
|
int i, rc = 0;
|
|
struct msc_a *msc_a = NULL;
|
|
struct gsm_trans *trans = NULL;
|
|
const struct gsm_mncc *data;
|
|
|
|
/* handle special messages */
|
|
switch(msg->msg_type) {
|
|
case MNCC_BRIDGE:
|
|
rc = tch_bridge(net, &msg->bridge);
|
|
if (rc < 0)
|
|
disconnect_bridge(net, &msg->bridge, -rc);
|
|
return rc;
|
|
case MNCC_RTP_CREATE:
|
|
return tch_rtp_create(net, msg->rtp.callref);
|
|
case MNCC_RTP_CONNECT:
|
|
return tch_rtp_connect(net, &msg->rtp);
|
|
case MNCC_RTP_FREE:
|
|
/* unused right now */
|
|
return -EIO;
|
|
|
|
case MNCC_FRAME_DROP:
|
|
case MNCC_FRAME_RECV:
|
|
case GSM_TCHF_FRAME:
|
|
case GSM_TCHF_FRAME_EFR:
|
|
case GSM_TCHH_FRAME:
|
|
case GSM_TCH_FRAME_AMR:
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_ERROR, "RTP streams must be handled externally; %s not supported.\n",
|
|
get_mncc_name(msg->msg_type));
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
data = &msg->signal;
|
|
|
|
/* Find callref */
|
|
trans = trans_find_by_callref(net, data->callref);
|
|
|
|
/* Callref unknown */
|
|
if (!trans) {
|
|
struct vlr_subscr *vsub;
|
|
|
|
if (msg->msg_type != MNCC_SETUP_REQ) {
|
|
LOG_TRANS_CAT(trans, DCC, LOGL_ERROR, "Unknown call reference for %s\n",
|
|
get_mncc_name(msg->msg_type));
|
|
/* Invalid call reference */
|
|
return mncc_release_ind(net, NULL, data->callref,
|
|
GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_INVAL_TRANS_ID);
|
|
}
|
|
if (!data->called.number[0] && !data->imsi[0]) {
|
|
LOG_TRANS_CAT(trans, DCC, LOGL_ERROR, "Neither number nor IMSI in %s\n",
|
|
get_mncc_name(msg->msg_type));
|
|
/* Invalid number */
|
|
return mncc_release_ind(net, NULL, data->callref,
|
|
GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_INV_NR_FORMAT);
|
|
}
|
|
/* New transaction due to setup, find subscriber */
|
|
if (data->called.number[0]) {
|
|
vsub = vlr_subscr_find_by_msisdn(net->vlr, data->called.number, __func__);
|
|
if (!vsub)
|
|
LOG_TRANS_CAT(trans, DCC, LOGL_ERROR, "rx %s for unknown subscriber number '%s'\n",
|
|
get_mncc_name(msg->msg_type), data->called.number);
|
|
} else {
|
|
vsub = vlr_subscr_find_by_imsi(net->vlr, data->imsi, __func__);
|
|
if (!vsub)
|
|
LOG_TRANS_CAT(trans, DCC, LOGL_ERROR, "rx %s for unknown subscriber IMSI '%s'\n",
|
|
get_mncc_name(msg->msg_type), data->imsi);
|
|
}
|
|
if (!vsub)
|
|
return mncc_release_ind(net, NULL, data->callref, GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_USER_NOTRESPOND);
|
|
/* update the subscriber we deal with */
|
|
log_set_context(LOG_CTX_VLR_SUBSCR, vsub);
|
|
|
|
/* If subscriber is not "attached" */
|
|
if (!vsub->lu_complete) {
|
|
LOG_TRANS_CAT(trans, DCC, LOGL_ERROR, "rx %s for subscriber that is not attached: %s\n",
|
|
get_mncc_name(msg->msg_type), vlr_subscr_name(vsub));
|
|
vlr_subscr_put(vsub, __func__);
|
|
/* Temporarily out of order */
|
|
return mncc_release_ind(net, NULL, data->callref,
|
|
GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_DEST_OOO);
|
|
}
|
|
|
|
/* Find valid conn */
|
|
msc_a = msc_a_for_vsub(vsub, true);
|
|
|
|
/* If subscriber is BUSY and we do not DO call in call aka "call-waiting" */
|
|
if (!net->call_waiting && msc_a) {
|
|
struct gsm_trans *existing_cc_trans = trans_find_by_type(msc_a, TRANS_CC);
|
|
if (existing_cc_trans && existing_cc_trans->cc.state != GSM_CSTATE_NULL) {
|
|
LOG_TRANS_CAT(existing_cc_trans, DCC, LOGL_NOTICE,
|
|
"rx '%s' for subscriber %s with trans state (%s)"
|
|
" rejecting with USER_BUSY\n",
|
|
get_mncc_name(msg->msg_type), data->called.number,
|
|
gsm48_cc_state_name(existing_cc_trans->cc.state));
|
|
return mncc_release_ind(net, NULL, data->callref,
|
|
GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_USER_BUSY);
|
|
}
|
|
}
|
|
|
|
/* Create transaction */
|
|
trans = trans_alloc(net, vsub, TRANS_CC,
|
|
TRANS_ID_UNASSIGNED, data->callref);
|
|
if (!trans) {
|
|
LOG_TRANS(trans, LOGL_ERROR, "No memory for trans.\n");
|
|
vlr_subscr_put(vsub, __func__);
|
|
/* Resource unavailable */
|
|
mncc_release_ind(net, NULL, data->callref,
|
|
GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* If subscriber has no conn */
|
|
if (!msc_a) {
|
|
/* This condition will return before the common logging of the received MNCC message below, so
|
|
* log it now. */
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_DEBUG, "rx %s\n", get_mncc_name(msg->msg_type));
|
|
|
|
/* store setup information until paging succeeds */
|
|
memcpy(&trans->cc.msg, data, sizeof(struct gsm_mncc));
|
|
|
|
/* Request a channel. If Paging already started, paging_request_start() will append the new
|
|
* trans to the already ongoing Paging. */
|
|
trans->paging_request = paging_request_start(vsub, PAGING_CAUSE_CALL_CONVERSATIONAL,
|
|
cc_paging_cb, trans, "MNCC: establish call");
|
|
if (!trans->paging_request) {
|
|
LOG_TRANS(trans, LOGL_ERROR, "Failed to allocate paging token.\n");
|
|
trans_free(trans);
|
|
}
|
|
vlr_subscr_put(vsub, __func__);
|
|
return 0;
|
|
}
|
|
|
|
/* Assign conn */
|
|
trans->msc_a = msc_a;
|
|
msc_a_get(msc_a, MSC_A_USE_CC);
|
|
trans->dlci = 0x00; /* SAPI=0, not SACCH */
|
|
vlr_subscr_put(vsub, __func__);
|
|
} else {
|
|
/* update the subscriber we deal with */
|
|
log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub);
|
|
}
|
|
|
|
LOG_TRANS_CAT(trans, DMNCC, LOGL_DEBUG, "rx %s\n", get_mncc_name(msg->msg_type));
|
|
|
|
gsm48_start_guard_timer(trans);
|
|
trans->cc.mncc_initiated = true;
|
|
|
|
if (trans->msc_a)
|
|
msc_a = trans->msc_a;
|
|
|
|
/* if paging did not respond yet */
|
|
if (!msc_a) {
|
|
struct gsm_mncc rel = {
|
|
.callref = data->callref,
|
|
};
|
|
LOG_TRANS(trans, LOGL_DEBUG, "rx %s in paging state\n", get_mncc_name(msg->msg_type));
|
|
mncc_set_cause(&rel, GSM48_CAUSE_LOC_PRN_S_LU,
|
|
GSM48_CC_CAUSE_NORM_CALL_CLEAR);
|
|
if (msg->msg_type == MNCC_REL_REQ)
|
|
rc = mncc_recvmsg(net, trans, MNCC_REL_CNF, &rel);
|
|
else
|
|
rc = mncc_recvmsg(net, trans, MNCC_REL_IND, &rel);
|
|
trans->callref = 0;
|
|
trans_free(trans);
|
|
return rc;
|
|
} else {
|
|
LOG_TRANS(trans, LOGL_DEBUG, "rx %s in state %s\n",
|
|
get_mncc_name(msg->msg_type), gsm48_cc_state_name(trans->cc.state));
|
|
}
|
|
|
|
/* Find function for current state and message */
|
|
for (i = 0; i < DOWNSLLEN; i++)
|
|
if ((msg->msg_type == downstatelist[i].type)
|
|
&& ((1 << trans->cc.state) & downstatelist[i].states))
|
|
break;
|
|
if (i == DOWNSLLEN) {
|
|
LOG_TRANS(trans, LOGL_DEBUG, "Message '%s' unhandled at state '%s'\n",
|
|
get_mncc_name(msg->msg_type), gsm48_cc_state_name(trans->cc.state));
|
|
return 0;
|
|
}
|
|
|
|
rc = downstatelist[i].rout(trans, (void*)msg);
|
|
|
|
return rc;
|
|
}
|
|
|
|
struct mncc_call *mncc_find_by_callref_from_msg(const union mncc_msg *msg)
|
|
{
|
|
uint32_t callref;
|
|
|
|
switch (msg->msg_type) {
|
|
case MNCC_BRIDGE:
|
|
callref = msg->bridge.callref[0];
|
|
break;
|
|
case MNCC_RTP_CREATE:
|
|
case MNCC_RTP_CONNECT:
|
|
callref = msg->rtp.callref;
|
|
break;
|
|
|
|
case MNCC_RTP_FREE:
|
|
case MNCC_FRAME_DROP:
|
|
case MNCC_FRAME_RECV:
|
|
case GSM_TCHF_FRAME:
|
|
case GSM_TCHF_FRAME_EFR:
|
|
case GSM_TCHH_FRAME:
|
|
case GSM_TCH_FRAME_AMR:
|
|
return NULL;
|
|
|
|
default:
|
|
callref = msg->signal.callref;
|
|
break;
|
|
}
|
|
|
|
return mncc_call_find_by_callref(callref);
|
|
}
|
|
|
|
/* Demux incoming genuine calls to GSM CC from MNCC forwarding for inter-MSC handover */
|
|
int mncc_tx_to_cc(struct gsm_network *net, void *arg)
|
|
{
|
|
const union mncc_msg *msg = arg;
|
|
struct mncc_call *mncc_call = NULL;
|
|
|
|
if (msg->msg_type == MNCC_SETUP_REQ) {
|
|
/* Incoming call to forward for inter-MSC Handover? */
|
|
mncc_call = msc_t_check_call_to_handover_number(&msg->signal);
|
|
if (mncc_call)
|
|
LOG_MNCC_CALL(mncc_call, LOGL_DEBUG,
|
|
"Incoming call matches pending inter-MSC Handover Number\n");
|
|
}
|
|
if (!mncc_call) {
|
|
/* Find already active MNCC FSM for this callref.
|
|
* Currently only for inter-MSC call forwarding, but mncc_fsm could at some point also be used for direct
|
|
* MNCC<->GSM-CC call handling. */
|
|
mncc_call = mncc_find_by_callref_from_msg(msg);
|
|
}
|
|
if (mncc_call) {
|
|
mncc_call_rx(mncc_call, msg);
|
|
return 0;
|
|
}
|
|
|
|
/* None of the above? Then it must be a normal GSM CC call related message. */
|
|
return mncc_tx_to_gsm_cc(net, msg);
|
|
}
|
|
|
|
static struct datastate {
|
|
uint32_t states;
|
|
int type;
|
|
int (*rout) (struct gsm_trans *trans, struct msgb *msg);
|
|
} datastatelist[] = {
|
|
/* mobile originating call establishment */
|
|
{SBIT(GSM_CSTATE_NULL), /* 5.2.1.2 */
|
|
GSM48_MT_CC_SETUP, gsm48_cc_rx_setup},
|
|
{SBIT(GSM_CSTATE_NULL), /* 5.2.1.2 */
|
|
GSM48_MT_CC_EMERG_SETUP, gsm48_cc_rx_setup},
|
|
{SBIT(GSM_CSTATE_CONNECT_IND), /* 5.2.1.2 */
|
|
GSM48_MT_CC_CONNECT_ACK, gsm48_cc_rx_connect_ack},
|
|
/* mobile terminating call establishment */
|
|
{SBIT(GSM_CSTATE_CALL_PRESENT), /* 5.2.2.3.2 */
|
|
GSM48_MT_CC_CALL_CONF, gsm48_cc_rx_call_conf},
|
|
{SBIT(GSM_CSTATE_CALL_PRESENT) | SBIT(GSM_CSTATE_MO_TERM_CALL_CONF), /* ???? | 5.2.2.3.2 */
|
|
GSM48_MT_CC_ALERTING, gsm48_cc_rx_alerting},
|
|
{SBIT(GSM_CSTATE_CALL_PRESENT) | SBIT(GSM_CSTATE_MO_TERM_CALL_CONF) | SBIT(GSM_CSTATE_CALL_RECEIVED), /* (5.2.2.6) | 5.2.2.6 | 5.2.2.6 */
|
|
GSM48_MT_CC_CONNECT, gsm48_cc_rx_connect},
|
|
/* signalling during call */
|
|
{ALL_STATES - SBIT(GSM_CSTATE_NULL),
|
|
GSM48_MT_CC_FACILITY, gsm48_cc_rx_facility},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
GSM48_MT_CC_NOTIFY, gsm48_cc_rx_notify},
|
|
{ALL_STATES,
|
|
GSM48_MT_CC_START_DTMF, gsm48_cc_rx_start_dtmf},
|
|
{ALL_STATES,
|
|
GSM48_MT_CC_STOP_DTMF, gsm48_cc_rx_stop_dtmf},
|
|
{ALL_STATES,
|
|
GSM48_MT_CC_STATUS_ENQ, gsm48_cc_rx_status_enq},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
GSM48_MT_CC_HOLD, gsm48_cc_rx_hold},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
GSM48_MT_CC_RETR, gsm48_cc_rx_retrieve},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
GSM48_MT_CC_MODIFY, gsm48_cc_rx_modify},
|
|
{SBIT(GSM_CSTATE_MO_TERM_MODIFY),
|
|
GSM48_MT_CC_MODIFY_COMPL, gsm48_cc_rx_modify_complete},
|
|
{SBIT(GSM_CSTATE_MO_TERM_MODIFY),
|
|
GSM48_MT_CC_MODIFY_REJECT, gsm48_cc_rx_modify_reject},
|
|
{SBIT(GSM_CSTATE_ACTIVE),
|
|
GSM48_MT_CC_USER_INFO, gsm48_cc_rx_userinfo},
|
|
/* clearing */
|
|
{ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ), /* 5.4.3.2 */
|
|
GSM48_MT_CC_DISCONNECT, gsm48_cc_rx_disconnect},
|
|
{ALL_STATES - SBIT(GSM_CSTATE_NULL), /* 5.4.4.1.2.2 */
|
|
GSM48_MT_CC_RELEASE, gsm48_cc_rx_release},
|
|
{ALL_STATES, /* 5.4.3.4 */
|
|
GSM48_MT_CC_RELEASE_COMPL, gsm48_cc_rx_release_compl},
|
|
};
|
|
|
|
#define DATASLLEN \
|
|
(sizeof(datastatelist) / sizeof(struct datastate))
|
|
|
|
int gsm0408_rcv_cc(struct msc_a *msc_a, struct msgb *msg)
|
|
{
|
|
struct gsm48_hdr *gh = msgb_l3(msg);
|
|
uint8_t msg_type = gsm48_hdr_msg_type(gh);
|
|
uint8_t transaction_id = gsm48_hdr_trans_id_flip_ti(gh);
|
|
struct gsm_trans *trans = NULL;
|
|
struct vlr_subscr *vsub = msc_a_vsub(msc_a);
|
|
struct gsm_network *net = msc_a_net(msc_a);
|
|
int i, rc = 0;
|
|
|
|
if (msg_type & 0x80) {
|
|
LOG_TRANS(trans, LOGL_DEBUG, "MSG 0x%2x not defined for PD error\n", msg_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!vsub) {
|
|
LOG_TRANS(trans, LOGL_ERROR, "Invalid conn: no subscriber\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Find transaction */
|
|
trans = trans_find_by_id(msc_a, TRANS_CC, transaction_id);
|
|
|
|
/* Create transaction */
|
|
if (!trans) {
|
|
/* Create transaction */
|
|
trans = trans_alloc(net, vsub,
|
|
TRANS_CC,
|
|
transaction_id, msc_cc_next_outgoing_callref());
|
|
if (!trans) {
|
|
LOG_TRANS(trans, LOGL_ERROR, "No memory for trans.\n");
|
|
rc = gsm48_tx_simple(msc_a,
|
|
GSM48_PDISC_CC | (transaction_id << 4),
|
|
GSM48_MT_CC_RELEASE_COMPL);
|
|
return -ENOMEM;
|
|
}
|
|
if (osmo_fsm_inst_dispatch(msc_a->c.fi, MSC_A_EV_TRANSACTION_ACCEPTED, trans)) {
|
|
LOG_MSC_A(msc_a, LOGL_ERROR, "Not allowed to accept CC transaction\n");
|
|
trans_free(trans);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Assign transaction */
|
|
msc_a_get(msc_a, MSC_A_USE_CC);
|
|
trans->msc_a = msc_a;
|
|
trans->dlci = OMSC_LINKID_CB(msg); /* DLCI as received from BSC */
|
|
|
|
/* An earlier CM Service Request for this CC message now has concluded */
|
|
if (!osmo_use_count_by(&msc_a->use_count, MSC_A_USE_CM_SERVICE_CC))
|
|
LOG_MSC_A(msc_a, LOGL_ERROR,
|
|
"Creating new CC transaction without prior CM Service Request\n");
|
|
else
|
|
msc_a_put(msc_a, MSC_A_USE_CM_SERVICE_CC);
|
|
}
|
|
|
|
LOG_TRANS(trans, LOGL_DEBUG, "rx %s in state %s\n", gsm48_cc_msg_name(msg_type),
|
|
gsm48_cc_state_name(trans->cc.state));
|
|
|
|
/* find function for current state and message */
|
|
for (i = 0; i < DATASLLEN; i++)
|
|
if ((msg_type == datastatelist[i].type)
|
|
&& ((1 << trans->cc.state) & datastatelist[i].states))
|
|
break;
|
|
if (i == DATASLLEN) {
|
|
LOG_TRANS(trans, LOGL_ERROR, "Message unhandled at this state.\n");
|
|
|
|
/* If a transaction was just now created, it was a bogus transaction ID, and we need to clean up the
|
|
* transaction right away. */
|
|
if (trans->cc.state == GSM_CSTATE_NULL) {
|
|
LOG_TRANS(trans, LOGL_ERROR, "Unknown transaction ID for non-SETUP message is not allowed"
|
|
" -- disarding new CC transaction right away\n");
|
|
trans_free(trans);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
assert(trans->vsub);
|
|
|
|
rc = datastatelist[i].rout(trans, msg);
|
|
|
|
return rc;
|
|
}
|