/* 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 * (C) 2008, 2009, 2010 by Holger Hans Peter Freyther * (C) 2009 by Mike Haben * * 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 . * */ #include #include #include #include #include #include #include #include /*! 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); }