| /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| |
| /* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2008, 2009, 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * (C) 2009 by Mike Haben <michael.haben@btinternet.com> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <stdint.h> |
| #include <errno.h> |
| |
| #include <osmocom/msc/gsm_04_80.h> |
| #include <osmocom/msc/msc_a.h> |
| |
| #include <osmocom/gsm/protocol/gsm_04_80.h> |
| #include <osmocom/gsm/gsm0480.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/gsm/tlv.h> |
| |
| /*! Send a MT RELEASE COMPLETE message with Reject component |
| * (see section 3.6.1) and given error code (see section 3.6.7). |
| * |
| * \param[in] msc_a Active subscriber |
| * \param[in] transaction_id Transaction ID with TI flag set |
| * \param[in] invoke_id InvokeID of the request |
| * \param[in] problem_tag Problem code tag (table 3.13) |
| * \param[in] problem_code Problem code (tables 3.14-17) |
| * \return result of \ref msc_tx_dtap |
| * |
| * Note: if InvokeID is not available, e.g. when message parsing |
| * failed, any incorrect value can be passed (0x00 > x > 0xff), so |
| * the universal NULL-tag (see table 3.6) will be used instead. |
| */ |
| int msc_send_ussd_reject(struct msc_a *msc_a, uint8_t transaction_id, int invoke_id, |
| uint8_t problem_tag, uint8_t problem_code) |
| { |
| struct gsm48_hdr *gh; |
| struct msgb *msg; |
| |
| msg = gsm0480_gen_reject(invoke_id, problem_tag, problem_code); |
| if (!msg) |
| return -1; |
| |
| /* Wrap the component in a Facility message */ |
| msgb_push_tl(msg, GSM0480_IE_FACILITY); |
| |
| /* And finally pre-pend the L3 header */ |
| gh = (struct gsm48_hdr *) msgb_push(msg, sizeof(*gh)); |
| gh->proto_discr = GSM48_PDISC_NC_SS; |
| gh->proto_discr |= transaction_id << 4; |
| gh->msg_type = GSM0480_MTYPE_RELEASE_COMPLETE; |
| |
| return msc_a_tx_dtap_to_i(msc_a, msg); |
| } |
| |
| int msc_send_ussd_notify(struct msc_a *msc_a, int level, const char *text) |
| { |
| struct msgb *msg = gsm0480_create_ussd_notify(level, text); |
| if (!msg) |
| return -1; |
| return msc_a_tx_dtap_to_i(msc_a, msg); |
| } |
| |
| int msc_send_ussd_release_complete(struct msc_a *msc_a, uint8_t transaction_id) |
| { |
| struct msgb *msg = gsm0480_create_release_complete(transaction_id); |
| if (!msg) |
| return -1; |
| return msc_a_tx_dtap_to_i(msc_a, msg); |
| } |
| |
| int msc_send_ussd_release_complete_cause(struct msc_a *msc_a, |
| uint8_t transaction_id, |
| uint8_t cause_loc, uint8_t cause_val) |
| { |
| struct msgb *msg; |
| uint8_t *cause_ie; |
| |
| msg = gsm0480_create_release_complete(transaction_id); |
| if (!msg) |
| return -1; |
| |
| /* Encode cause IE (see GSM 04.08, section 10.5.4.11) |
| * with fixed length (2 bytes of TL, 2 bytes of payload). |
| * NOTE: we don't use gsm48_encode_cause() API because |
| * it wants gsm_mncc_cause struct from us. */ |
| cause_ie = msgb_put(msg, 2 + 2); |
| cause_ie[0] = GSM48_IE_CAUSE; |
| cause_ie[1] = 2; |
| |
| /* Coding standard defined for the GSM PLMNs, |
| * location and cause: as given by caller, |
| * no extension, no diagnostics. */ |
| cause_ie[2] = (1 << 7) | (0x03 << 5) | (cause_loc & 0x0f); |
| cause_ie[3] = (1 << 7) | cause_val; |
| |
| return msc_a_tx_dtap_to_i(msc_a, msg); |
| } |