Harald Welte | 8c8f791 | 2009-10-26 20:42:55 +0100 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
| 4 | /* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 680833e | 2010-07-25 18:08:53 +0800 | [diff] [blame] | 5 | * (C) 2008, 2009, 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 6 | * (C) 2009 by Mike Haben <michael.haben@btinternet.com> |
| 7 | * |
| 8 | * All Rights Reserved |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 11 | * it under the terms of the GNU Affero General Public License as published by |
| 12 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 18 | * GNU Affero General Public License for more details. |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 19 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 20 | * You should have received a copy of the GNU Affero General Public License |
| 21 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 22 | * |
| 23 | */ |
| 24 | |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <errno.h> |
| 30 | |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 31 | #include <osmocom/msc/debug.h> |
| 32 | #include <osmocom/msc/gsm_data.h> |
| 33 | #include <osmocom/msc/gsm_04_08.h> |
| 34 | #include <osmocom/msc/gsm_04_80.h> |
| 35 | #include <osmocom/msc/msc_ifaces.h> |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 36 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 37 | #include <osmocom/gsm/gsm0480.h> |
| 38 | #include <osmocom/gsm/gsm_utils.h> |
| 39 | #include <osmocom/core/msgb.h> |
| 40 | #include <osmocom/gsm/tlv.h> |
Holger Hans Peter Freyther | c0714b8 | 2010-09-30 18:48:28 +0800 | [diff] [blame] | 41 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 42 | static inline unsigned char *msgb_wrap_with_TL(struct msgb *msgb, uint8_t tag) |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 43 | { |
Holger Hans Peter Freyther | ac30cc8 | 2010-07-26 19:08:59 +0800 | [diff] [blame] | 44 | uint8_t *data = msgb_push(msgb, 2); |
| 45 | |
| 46 | data[0] = tag; |
Holger Hans Peter Freyther | e6373b7 | 2010-07-27 01:25:59 +0800 | [diff] [blame] | 47 | data[1] = msgb->len - 2; |
Holger Hans Peter Freyther | ac30cc8 | 2010-07-26 19:08:59 +0800 | [diff] [blame] | 48 | return data; |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 49 | } |
| 50 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 51 | static inline unsigned char *msgb_push_TLV1(struct msgb *msgb, uint8_t tag, |
| 52 | uint8_t value) |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 53 | { |
Holger Hans Peter Freyther | ac30cc8 | 2010-07-26 19:08:59 +0800 | [diff] [blame] | 54 | uint8_t *data = msgb_push(msgb, 3); |
| 55 | |
| 56 | data[0] = tag; |
| 57 | data[1] = 1; |
| 58 | data[2] = value; |
| 59 | return data; |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 63 | /* Send response to a mobile-originated ProcessUnstructuredSS-Request */ |
Holger Hans Peter Freyther | d42c3f2 | 2010-06-17 17:35:57 +0800 | [diff] [blame] | 64 | int gsm0480_send_ussd_response(struct gsm_subscriber_connection *conn, |
Vadim Yanitskiy | 12d221f | 2018-04-04 05:30:16 +0700 | [diff] [blame] | 65 | const char *response_text, const struct ss_request *req) |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 66 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 67 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 USSD RSP"); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 68 | struct gsm48_hdr *gh; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 69 | uint8_t *ptr8; |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 70 | int response_len; |
| 71 | |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 72 | /* First put the payload text into the message */ |
Holger Hans Peter Freyther | ba81ab3 | 2010-07-26 17:56:55 +0800 | [diff] [blame] | 73 | ptr8 = msgb_put(msg, 0); |
Holger Hans Peter Freyther | 1f229b3 | 2013-12-26 22:17:45 +0100 | [diff] [blame] | 74 | gsm_7bit_encode_n_ussd(ptr8, msgb_tailroom(msg), response_text, &response_len); |
Holger Hans Peter Freyther | ba81ab3 | 2010-07-26 17:56:55 +0800 | [diff] [blame] | 75 | msgb_put(msg, response_len); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 76 | |
| 77 | /* Then wrap it as an Octet String */ |
| 78 | msgb_wrap_with_TL(msg, ASN1_OCTET_STRING_TAG); |
| 79 | |
| 80 | /* Pre-pend the DCS octet string */ |
| 81 | msgb_push_TLV1(msg, ASN1_OCTET_STRING_TAG, 0x0F); |
| 82 | |
| 83 | /* Then wrap these as a Sequence */ |
| 84 | msgb_wrap_with_TL(msg, GSM_0480_SEQUENCE_TAG); |
| 85 | |
| 86 | /* Pre-pend the operation code */ |
Harald Welte | 6307b85 | 2009-10-16 08:41:51 +0200 | [diff] [blame] | 87 | msgb_push_TLV1(msg, GSM0480_OPERATION_CODE, |
| 88 | GSM0480_OP_CODE_PROCESS_USS_REQ); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 89 | |
| 90 | /* Wrap the operation code and IA5 string as a sequence */ |
| 91 | msgb_wrap_with_TL(msg, GSM_0480_SEQUENCE_TAG); |
| 92 | |
| 93 | /* Pre-pend the invoke ID */ |
Mike Haben | dc329a6 | 2009-10-22 09:56:44 +0200 | [diff] [blame] | 94 | msgb_push_TLV1(msg, GSM0480_COMPIDTAG_INVOKE_ID, req->invoke_id); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 95 | |
| 96 | /* Wrap this up as a Return Result component */ |
| 97 | msgb_wrap_with_TL(msg, GSM0480_CTYPE_RETURN_RESULT); |
| 98 | |
| 99 | /* Wrap the component in a Facility message */ |
| 100 | msgb_wrap_with_TL(msg, GSM0480_IE_FACILITY); |
| 101 | |
| 102 | /* And finally pre-pend the L3 header */ |
| 103 | gh = (struct gsm48_hdr *) msgb_push(msg, sizeof(*gh)); |
Harald Welte | 8c8f791 | 2009-10-26 20:42:55 +0100 | [diff] [blame] | 104 | gh->proto_discr = GSM48_PDISC_NC_SS | req->transaction_id |
Mike Haben | dc329a6 | 2009-10-22 09:56:44 +0200 | [diff] [blame] | 105 | | (1<<7); /* TI direction = 1 */ |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 106 | gh->msg_type = GSM0480_MTYPE_RELEASE_COMPLETE; |
| 107 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 108 | return msc_tx_dtap(conn, msg); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 109 | } |
| 110 | |
Holger Hans Peter Freyther | d42c3f2 | 2010-06-17 17:35:57 +0800 | [diff] [blame] | 111 | int gsm0480_send_ussd_reject(struct gsm_subscriber_connection *conn, |
Holger Hans Peter Freyther | 5085e0b | 2016-07-12 17:53:26 +0200 | [diff] [blame] | 112 | const struct ss_request *req) |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 113 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 114 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 USSD REJ"); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 115 | struct gsm48_hdr *gh; |
| 116 | |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 117 | /* First insert the problem code */ |
Harald Welte | 6307b85 | 2009-10-16 08:41:51 +0200 | [diff] [blame] | 118 | msgb_push_TLV1(msg, GSM_0480_PROBLEM_CODE_TAG_GENERAL, |
| 119 | GSM_0480_GEN_PROB_CODE_UNRECOGNISED); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 120 | |
| 121 | /* Before it insert the invoke ID */ |
Mike Haben | dc329a6 | 2009-10-22 09:56:44 +0200 | [diff] [blame] | 122 | msgb_push_TLV1(msg, GSM0480_COMPIDTAG_INVOKE_ID, req->invoke_id); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 123 | |
| 124 | /* Wrap this up as a Reject component */ |
| 125 | msgb_wrap_with_TL(msg, GSM0480_CTYPE_REJECT); |
| 126 | |
| 127 | /* Wrap the component in a Facility message */ |
| 128 | msgb_wrap_with_TL(msg, GSM0480_IE_FACILITY); |
| 129 | |
| 130 | /* And finally pre-pend the L3 header */ |
| 131 | gh = (struct gsm48_hdr *) msgb_push(msg, sizeof(*gh)); |
Harald Welte | 6307b85 | 2009-10-16 08:41:51 +0200 | [diff] [blame] | 132 | gh->proto_discr = GSM48_PDISC_NC_SS; |
Mike Haben | dc329a6 | 2009-10-22 09:56:44 +0200 | [diff] [blame] | 133 | gh->proto_discr |= req->transaction_id | (1<<7); /* TI direction = 1 */ |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 134 | gh->msg_type = GSM0480_MTYPE_RELEASE_COMPLETE; |
| 135 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 136 | return msc_tx_dtap(conn, msg); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 137 | } |
Holger Hans Peter Freyther | daf7534 | 2010-07-26 20:01:07 +0800 | [diff] [blame] | 138 | |
Neels Hofmeyr | 43273c6 | 2016-05-10 12:50:31 +0200 | [diff] [blame] | 139 | int msc_send_ussd_notify(struct gsm_subscriber_connection *conn, int level, const char *text) |
Holger Hans Peter Freyther | daf7534 | 2010-07-26 20:01:07 +0800 | [diff] [blame] | 140 | { |
Neels Hofmeyr | 43273c6 | 2016-05-10 12:50:31 +0200 | [diff] [blame] | 141 | struct msgb *msg = gsm0480_create_ussd_notify(level, text); |
Holger Hans Peter Freyther | daf7534 | 2010-07-26 20:01:07 +0800 | [diff] [blame] | 142 | if (!msg) |
| 143 | return -1; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 144 | return msc_tx_dtap(conn, msg); |
Holger Hans Peter Freyther | daf7534 | 2010-07-26 20:01:07 +0800 | [diff] [blame] | 145 | } |
Holger Hans Peter Freyther | 68d2679 | 2010-07-27 03:31:50 +0800 | [diff] [blame] | 146 | |
Neels Hofmeyr | 43273c6 | 2016-05-10 12:50:31 +0200 | [diff] [blame] | 147 | int msc_send_ussd_release_complete(struct gsm_subscriber_connection *conn) |
Holger Hans Peter Freyther | 68d2679 | 2010-07-27 03:31:50 +0800 | [diff] [blame] | 148 | { |
Neels Hofmeyr | 43273c6 | 2016-05-10 12:50:31 +0200 | [diff] [blame] | 149 | struct msgb *msg = gsm0480_create_ussd_release_complete(); |
Holger Hans Peter Freyther | 68d2679 | 2010-07-27 03:31:50 +0800 | [diff] [blame] | 150 | if (!msg) |
| 151 | return -1; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 152 | return msc_tx_dtap(conn, msg); |
Holger Hans Peter Freyther | 68d2679 | 2010-07-27 03:31:50 +0800 | [diff] [blame] | 153 | } |