Holger Hans Peter Freyther | acf8a0c | 2010-03-29 08:47:44 +0200 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 4 | /* (C) 2008-2016 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | c121bb3 | 2012-12-26 10:17:42 +0100 | [diff] [blame] | 5 | * (C) 2008-2012 by Holger Hans Peter Freyther <zecke@selfish.org> |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 6 | * |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
Max | ddee01f | 2016-05-24 14:23:27 +0200 | [diff] [blame] | 28 | #include <stdbool.h> |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 29 | #include <errno.h> |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 30 | #include <time.h> |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 31 | #include <netinet/in.h> |
Max | ddee01f | 2016-05-24 14:23:27 +0200 | [diff] [blame] | 32 | #include <regex.h> |
| 33 | #include <sys/types.h> |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 34 | |
Neels Hofmeyr | 4ac8009 | 2019-03-04 02:46:37 +0100 | [diff] [blame] | 35 | #include "config.h" |
Harald Welte | 9c3dc90 | 2012-04-08 16:59:24 +0200 | [diff] [blame] | 36 | |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 37 | #include <osmocom/msc/db.h> |
| 38 | #include <osmocom/msc/debug.h> |
| 39 | #include <osmocom/msc/gsm_data.h> |
| 40 | #include <osmocom/msc/gsm_subscriber.h> |
| 41 | #include <osmocom/msc/gsm_04_11.h> |
| 42 | #include <osmocom/msc/gsm_04_08.h> |
| 43 | #include <osmocom/msc/gsm_04_80.h> |
| 44 | #include <osmocom/msc/gsm_04_14.h> |
Vadim Yanitskiy | 5b860fa | 2018-06-12 05:24:52 +0700 | [diff] [blame] | 45 | #include <osmocom/msc/gsm_09_11.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 46 | #include <osmocom/msc/signal.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 47 | #include <osmocom/msc/transaction.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 48 | #include <osmocom/msc/silent_call.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 49 | #include <osmocom/msc/mncc_int.h> |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 50 | #include <osmocom/abis/e1_input.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 51 | #include <osmocom/core/bitvec.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 52 | #include <osmocom/msc/vlr.h> |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 53 | #include <osmocom/msc/msc_a.h> |
| 54 | #include <osmocom/msc/paging.h> |
Holger Hans Peter Freyther | 841c200 | 2010-09-30 18:52:23 +0800 | [diff] [blame] | 55 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 56 | #include <osmocom/gsm/gsm48.h> |
| 57 | #include <osmocom/gsm/gsm0480.h> |
| 58 | #include <osmocom/gsm/gsm_utils.h> |
Max | 8db12e4 | 2016-04-18 23:11:18 +0200 | [diff] [blame] | 59 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 60 | #include <osmocom/core/msgb.h> |
| 61 | #include <osmocom/core/talloc.h> |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 62 | #include <osmocom/core/utils.h> |
Philipp Maier | 621ba03 | 2017-11-07 17:19:25 +0100 | [diff] [blame] | 63 | #include <osmocom/core/byteswap.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 64 | #include <osmocom/gsm/tlv.h> |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 65 | #include <osmocom/crypt/auth.h> |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 66 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 67 | #include <osmocom/msc/msub.h> |
| 68 | #include <osmocom/msc/msc_roles.h> |
Philipp Maier | fbf6610 | 2017-04-09 12:32:51 +0200 | [diff] [blame] | 69 | |
Holger Hans Peter Freyther | 1e61b25 | 2013-07-06 11:45:38 +0200 | [diff] [blame] | 70 | #include <assert.h> |
| 71 | |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 72 | |
Harald Welte (local) | d19e58b | 2009-08-15 02:30:58 +0200 | [diff] [blame] | 73 | void *tall_locop_ctx; |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 74 | void *tall_authciphop_ctx; |
Harald Welte | 2cf161b | 2009-06-20 22:36:41 +0200 | [diff] [blame] | 75 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 76 | static int gsm0408_loc_upd_acc(struct msc_a *msc_a, uint32_t send_tmsi); |
Harald Welte | 65e74cc | 2008-12-29 01:55:35 +0000 | [diff] [blame] | 77 | |
Harald Welte | 27989d4 | 2018-06-21 20:39:20 +0200 | [diff] [blame] | 78 | /*! Send a simple GSM 04.08 message without any payload |
Neels Hofmeyr | c036b79 | 2018-11-29 22:37:51 +0100 | [diff] [blame] | 79 | * \param conn Active RAN connection |
Harald Welte | 27989d4 | 2018-06-21 20:39:20 +0200 | [diff] [blame] | 80 | * \param[in] pdisc Protocol discriminator |
| 81 | * \param[in] msg_type Message type |
| 82 | * \return result of \ref gsm48_conn_sendmsg |
| 83 | */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 84 | int gsm48_tx_simple(struct msc_a *msc_a, uint8_t pdisc, uint8_t msg_type) |
Harald Welte | 27989d4 | 2018-06-21 20:39:20 +0200 | [diff] [blame] | 85 | { |
| 86 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 TX SIMPLE"); |
| 87 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 88 | |
| 89 | gh->proto_discr = pdisc; |
| 90 | gh->msg_type = msg_type; |
| 91 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 92 | return msc_a_tx_dtap_to_i(msc_a, msg); |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 93 | } |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 94 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 95 | /* clear all transactions globally; used in case of MNCC socket disconnect */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 96 | void gsm0408_clear_all_trans(struct gsm_network *net, enum trans_type type) |
Harald Welte | 371efe5 | 2010-12-22 23:17:50 +0100 | [diff] [blame] | 97 | { |
| 98 | struct gsm_trans *trans, *temp; |
| 99 | |
| 100 | LOGP(DCC, LOGL_NOTICE, "Clearing all currently active transactions!!!\n"); |
| 101 | |
| 102 | llist_for_each_entry_safe(trans, temp, &net->trans_list, entry) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 103 | if (trans->type == type) { |
Harald Welte | eb76c7a | 2010-12-23 02:47:53 +0100 | [diff] [blame] | 104 | trans->callref = 0; |
Harald Welte | 371efe5 | 2010-12-22 23:17:50 +0100 | [diff] [blame] | 105 | trans_free(trans); |
Harald Welte | eb76c7a | 2010-12-23 02:47:53 +0100 | [diff] [blame] | 106 | } |
Harald Welte | 371efe5 | 2010-12-22 23:17:50 +0100 | [diff] [blame] | 107 | } |
| 108 | } |
| 109 | |
Holger Freyther | 429e776 | 2008-12-30 13:28:30 +0000 | [diff] [blame] | 110 | /* Chapter 9.2.14 : Send LOCATION UPDATING REJECT */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 111 | static int gsm0408_loc_upd_rej(struct msc_a *msc_a, uint8_t cause) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 112 | { |
Holger Hans Peter Freyther | 230a4d8 | 2010-06-15 19:40:05 +0800 | [diff] [blame] | 113 | struct msgb *msg; |
| 114 | |
Holger Hans Peter Freyther | 230a4d8 | 2010-06-15 19:40:05 +0800 | [diff] [blame] | 115 | msg = gsm48_create_loc_upd_rej(cause); |
| 116 | if (!msg) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 117 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "Failed to create msg for LOCATION UPDATING REJECT.\n"); |
Holger Hans Peter Freyther | 230a4d8 | 2010-06-15 19:40:05 +0800 | [diff] [blame] | 118 | return -1; |
| 119 | } |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 120 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 121 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_INFO, "LOCATION UPDATING REJECT\n"); |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 122 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 123 | return msc_a_tx_dtap_to_i(msc_a, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /* Chapter 9.2.13 : Send LOCATION UPDATE ACCEPT */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 127 | static int gsm0408_loc_upd_acc(struct msc_a *msc_a, uint32_t send_tmsi) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 128 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 129 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 LOC UPD ACC"); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 130 | struct gsm48_hdr *gh; |
| 131 | struct gsm48_loc_area_id *lai; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 132 | uint8_t *mid; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 133 | struct gsm_network *net = msc_a_net(msc_a); |
| 134 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 135 | struct osmo_location_area_id laid = { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 136 | .plmn = net->plmn, |
| 137 | .lac = vsub->cgi.lai.lac, |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 138 | }; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 139 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 140 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 141 | gh->proto_discr = GSM48_PDISC_MM; |
| 142 | gh->msg_type = GSM48_MT_MM_LOC_UPD_ACCEPT; |
| 143 | |
| 144 | lai = (struct gsm48_loc_area_id *) msgb_put(msg, sizeof(*lai)); |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 145 | gsm48_generate_lai2(lai, &laid); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 146 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 147 | if (send_tmsi == GSM_RESERVED_TMSI) { |
| 148 | /* we did not allocate a TMSI to the MS, so we need to |
| 149 | * include the IMSI in order for the MS to delete any |
| 150 | * old TMSI that might still be allocated */ |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 151 | uint8_t mi[10]; |
| 152 | int len; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 153 | len = gsm48_generate_mid_from_imsi(mi, vsub->imsi); |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 154 | mid = msgb_put(msg, len); |
| 155 | memcpy(mid, mi, len); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 156 | DEBUGP(DMM, "-> %s LOCATION UPDATE ACCEPT\n", |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 157 | vlr_subscr_name(vsub)); |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 158 | } else { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 159 | /* Include the TMSI, which means that the MS will send a |
| 160 | * TMSI REALLOCATION COMPLETE, and we should wait for |
| 161 | * that until T3250 expiration */ |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 162 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 163 | gsm48_generate_mid_from_tmsi(mid, send_tmsi); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 164 | DEBUGP(DMM, "-> %s LOCATION UPDATE ACCEPT (TMSI = 0x%08x)\n", |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 165 | vlr_subscr_name(vsub), |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 166 | send_tmsi); |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 167 | } |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 168 | /* TODO: Follow-on proceed */ |
| 169 | /* TODO: CTS permission */ |
| 170 | /* TODO: Equivalent PLMNs */ |
| 171 | /* TODO: Emergency Number List */ |
| 172 | /* TODO: Per-MS T3312 */ |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 173 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 174 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 175 | return msc_a_tx_dtap_to_i(msc_a, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 176 | } |
| 177 | |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 178 | /* Transmit Chapter 9.2.10 Identity Request */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 179 | static int mm_tx_identity_req(struct msc_a *msc_a, uint8_t id_type) |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 180 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 181 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ID REQ"); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 182 | struct gsm48_hdr *gh; |
Harald Welte | fc977a8 | 2008-12-27 10:19:37 +0000 | [diff] [blame] | 183 | |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 184 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 185 | gh->proto_discr = GSM48_PDISC_MM; |
| 186 | gh->msg_type = GSM48_MT_MM_ID_REQ; |
| 187 | gh->data[0] = id_type; |
| 188 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 189 | return msc_a_tx_dtap_to_i(msc_a, msg); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 190 | } |
| 191 | |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 192 | /* Parse Chapter 9.2.11 Identity Response */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 193 | static int mm_rx_id_resp(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 194 | { |
| 195 | struct gsm48_hdr *gh = msgb_l3(msg); |
Neels Hofmeyr | b62289a | 2019-01-11 00:04:32 +0100 | [diff] [blame] | 196 | uint8_t *mi = gh->data+1; |
| 197 | uint8_t mi_len = gh->data[0]; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 198 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 199 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 200 | if (!vsub) { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 201 | LOGP(DMM, LOGL_ERROR, |
| 202 | "Rx MM Identity Response: invalid: no subscriber\n"); |
| 203 | return -EINVAL; |
| 204 | } |
| 205 | |
Neels Hofmeyr | b62289a | 2019-01-11 00:04:32 +0100 | [diff] [blame] | 206 | DEBUGP(DMM, "IDENTITY RESPONSE: MI=%s\n", osmo_mi_name(mi, mi_len)); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 207 | |
Pablo Neira Ayuso | bbc5b99 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 208 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, gh->data); |
Harald Welte | 7659de1 | 2009-12-13 12:39:18 +0100 | [diff] [blame] | 209 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 210 | return vlr_subscr_rx_id_resp(vsub, mi, mi_len); |
| 211 | } |
| 212 | |
| 213 | /* 9.2.5 CM service accept */ |
| 214 | static int msc_gsm48_tx_mm_serv_ack(struct msc_a *msc_a) |
| 215 | { |
| 216 | struct msgb *msg; |
| 217 | struct gsm48_hdr *gh; |
| 218 | |
| 219 | msg = gsm48_msgb_alloc_name("GSM 04.08 SERV ACC"); |
| 220 | |
| 221 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 222 | gh->proto_discr = GSM48_PDISC_MM; |
| 223 | gh->msg_type = GSM48_MT_MM_CM_SERV_ACC; |
| 224 | |
| 225 | return msc_a_tx_dtap_to_i(msc_a, msg); |
| 226 | } |
| 227 | |
| 228 | /* 9.2.6 CM service reject */ |
| 229 | static int msc_gsm48_tx_mm_serv_rej(struct msc_a *msc_a, |
| 230 | enum gsm48_reject_value value) |
| 231 | { |
| 232 | struct msgb *msg; |
| 233 | |
| 234 | msg = gsm48_create_mm_serv_rej(value); |
| 235 | if (!msg) { |
| 236 | LOGP(DMM, LOGL_ERROR, "Failed to allocate CM Service Reject.\n"); |
| 237 | return -1; |
| 238 | } |
| 239 | |
| 240 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "-> CM SERVICE Reject cause: %d\n", value); |
| 241 | |
| 242 | return msc_a_tx_dtap_to_i(msc_a, msg); |
| 243 | } |
| 244 | |
| 245 | |
| 246 | /* Extract the R99 flag from various Complete Level 3 messages. Depending on the Message Type, extract R99 from the |
| 247 | * Classmark Type 1 or the Classmark Type 2. Return 1 for R99, 0 for pre-R99, negative if not a valid Complete Level 3 |
| 248 | * message. */ |
| 249 | int compl_l3_msg_is_r99(const struct msgb *msg) |
| 250 | { |
| 251 | const struct gsm48_hdr *gh = msgb_l3(msg); |
| 252 | uint8_t pdisc = gsm48_hdr_pdisc(gh); |
| 253 | const struct gsm48_loc_upd_req *lu; |
| 254 | const struct gsm48_imsi_detach_ind *idi; |
| 255 | uint8_t cm2_len; |
| 256 | const struct gsm48_classmark2 *cm2; |
| 257 | |
| 258 | switch (pdisc) { |
| 259 | case GSM48_PDISC_MM: |
| 260 | switch (gsm48_hdr_msg_type(gh)) { |
| 261 | case GSM48_MT_MM_LOC_UPD_REQUEST: |
| 262 | lu = (const struct gsm48_loc_upd_req *) gh->data; |
| 263 | return osmo_gsm48_classmark1_is_r99(&lu->classmark1) ? 1 : 0; |
| 264 | |
| 265 | case GSM48_MT_MM_CM_SERV_REQ: |
| 266 | case GSM48_MT_MM_CM_REEST_REQ: |
| 267 | break; |
| 268 | |
| 269 | case GSM48_MT_MM_IMSI_DETACH_IND: |
| 270 | idi = (const struct gsm48_imsi_detach_ind *) gh->data; |
| 271 | return osmo_gsm48_classmark1_is_r99(&idi->classmark1) ? 1 : 0; |
| 272 | |
| 273 | default: |
| 274 | return -1; |
| 275 | } |
| 276 | break; |
| 277 | |
| 278 | case GSM48_PDISC_RR: |
| 279 | switch (gsm48_hdr_msg_type(gh)) { |
| 280 | case GSM48_MT_RR_PAG_RESP: |
| 281 | break; |
| 282 | |
| 283 | default: |
| 284 | return -1; |
| 285 | } |
| 286 | break; |
| 287 | |
| 288 | default: |
| 289 | return -1; |
| 290 | } |
| 291 | |
| 292 | /* Both CM Service Request and Paging Response have Classmark Type 2 at the same location: */ |
| 293 | cm2_len = gh->data[1]; |
| 294 | cm2 = (void*)gh->data+2; |
| 295 | return osmo_gsm48_classmark2_is_r99(cm2, cm2_len) ? 1 : 0; |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 296 | } |
| 297 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 298 | /* Chapter 9.2.15: Receive Location Updating Request. |
| 299 | * Keep this function non-static for direct invocation by unit tests. */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 300 | static int mm_rx_loc_upd_req(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 301 | { |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 302 | struct gsm48_hdr *gh = msgb_l3(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 303 | struct gsm48_loc_upd_req *lu; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 304 | uint8_t mi_type; |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 305 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 306 | enum vlr_lu_type vlr_lu_type = VLR_LU_TYPE_REGULAR; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 307 | uint32_t tmsi; |
| 308 | char *imsi; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 309 | struct osmo_location_area_id old_lai; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 310 | struct osmo_fsm_inst *lu_fsm; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 311 | bool is_utran; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 312 | struct gsm_network *net = msc_a_net(msc_a); |
| 313 | struct vlr_subscr *vsub; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 314 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 315 | lu = (struct gsm48_loc_upd_req *) gh->data; |
| 316 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 317 | if (msc_a_is_establishing_auth_ciph(msc_a)) { |
| 318 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, |
| 319 | "Cannot accept another LU, conn already busy establishing authenticity;" |
| 320 | " extraneous LOCATION UPDATING REQUEST: MI=%s LU-type=%s\n", |
| 321 | osmo_mi_name(lu->mi, lu->mi_len), osmo_lu_type_name(lu->type)); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 322 | return -EINVAL; |
| 323 | } |
| 324 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 325 | if (msc_a_is_accepted(msc_a)) { |
| 326 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, |
| 327 | "Cannot accept another LU, conn already established;" |
| 328 | " extraneous LOCATION UPDATING REQUEST: MI=%s LU-type=%s\n", |
| 329 | osmo_mi_name(lu->mi, lu->mi_len), osmo_lu_type_name(lu->type)); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 330 | return -EINVAL; |
| 331 | } |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 332 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 333 | msc_a->complete_layer3_type = COMPLETE_LAYER3_LU; |
| 334 | msub_update_id_from_mi(msc_a->c.msub, lu->mi, lu->mi_len); |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 335 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 336 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "LOCATION UPDATING REQUEST: MI=%s LU-type=%s\n", |
| 337 | osmo_mi_name(lu->mi, lu->mi_len), osmo_lu_type_name(lu->type)); |
Holger Freyther | 73487a2 | 2008-12-31 18:53:57 +0000 | [diff] [blame] | 338 | |
Pablo Neira Ayuso | bbc5b99 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 339 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, &lu->mi_len); |
Harald Welte | 7659de1 | 2009-12-13 12:39:18 +0100 | [diff] [blame] | 340 | |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 341 | switch (lu->type) { |
| 342 | case GSM48_LUPD_NORMAL: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 343 | rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_NORMAL]); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 344 | vlr_lu_type = VLR_LU_TYPE_REGULAR; |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 345 | break; |
| 346 | case GSM48_LUPD_IMSI_ATT: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 347 | rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_ATTACH]); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 348 | vlr_lu_type = VLR_LU_TYPE_IMSI_ATTACH; |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 349 | break; |
| 350 | case GSM48_LUPD_PERIODIC: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 351 | rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_PERIODIC]); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 352 | vlr_lu_type = VLR_LU_TYPE_PERIODIC; |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 353 | break; |
| 354 | } |
| 355 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 356 | /* TODO: 10.5.1.6 MS Classmark for UMTS / Classmark 2 */ |
| 357 | /* TODO: 10.5.3.14 Aditional update parameters (CS fallback calls) */ |
| 358 | /* TODO: 10.5.7.8 Device properties */ |
| 359 | /* TODO: 10.5.1.15 MS network feature support */ |
Sylvain Munaut | 2030a2a | 2010-06-10 13:36:59 +0200 | [diff] [blame] | 360 | |
Neels Hofmeyr | 361e571 | 2019-01-03 02:32:14 +0100 | [diff] [blame] | 361 | mi_type = lu->mi[0] & GSM_MI_TYPE_MASK; |
| 362 | gsm48_mi_to_string(mi_string, sizeof(mi_string), lu->mi, lu->mi_len); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 363 | switch (mi_type) { |
| 364 | case GSM_MI_TYPE_IMSI: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 365 | tmsi = GSM_RESERVED_TMSI; |
| 366 | imsi = mi_string; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 367 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 368 | case GSM_MI_TYPE_TMSI: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 369 | tmsi = tmsi_from_string(mi_string); |
| 370 | imsi = NULL; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 371 | break; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 372 | default: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 373 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "unknown mobile identity type\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 374 | tmsi = GSM_RESERVED_TMSI; |
| 375 | imsi = NULL; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 376 | break; |
| 377 | } |
| 378 | |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 379 | gsm48_decode_lai2(&lu->lai, &old_lai); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 380 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "USIM: old LAI: %s\n", osmo_lai_name(&old_lai)); |
Harald Welte | 24516ea | 2009-07-04 10:18:00 +0200 | [diff] [blame] | 381 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 382 | msc_a_get(msc_a, __func__); |
| 383 | msc_a_get(msc_a, MSC_A_USE_LOCATION_UPDATING); |
| 384 | |
| 385 | is_utran = (msc_a->c.ran->type == OSMO_RAT_UTRAN_IU); |
| 386 | lu_fsm = vlr_loc_update(msc_a->c.fi, |
| 387 | MSC_A_EV_AUTHENTICATED, MSC_A_EV_CN_CLOSE, NULL, |
| 388 | net->vlr, msc_a, vlr_lu_type, tmsi, imsi, |
| 389 | &old_lai, &msc_a->via_cell.lai, |
| 390 | is_utran || net->authentication_required, |
| 391 | is_utran || net->a5_encryption_mask > 0x01, |
Sylvain Munaut | da9f37e | 2019-03-14 11:02:36 +0100 | [diff] [blame] | 392 | lu->key_seq, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 393 | osmo_gsm48_classmark1_is_r99(&lu->classmark1), |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 394 | is_utran, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 395 | net->vlr->cfg.assign_tmsi); |
| 396 | if (!lu_fsm) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 397 | LOG_MSC_A(msc_a, LOGL_ERROR, "Can't start LU FSM\n"); |
| 398 | msc_a_put(msc_a, MSC_A_USE_LOCATION_UPDATING); |
| 399 | msc_a_put(msc_a, __func__); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 400 | return 0; |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 401 | } |
| 402 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 403 | /* From vlr_loc_update() we expect an implicit dispatch of |
| 404 | * VLR_ULA_E_UPDATE_LA, and thus we expect msc_vlr_subscr_assoc() to |
| 405 | * already have been called and completed. Has an error occured? */ |
Harald Welte | 255539c | 2008-12-28 02:26:27 +0000 | [diff] [blame] | 406 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 407 | vsub = msc_a_vsub(msc_a); |
| 408 | if (!vsub) { |
| 409 | msc_a_put(msc_a, __func__); |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | if (vsub->lu_fsm != lu_fsm) { |
| 414 | LOG_MSC_A(msc_a, LOGL_ERROR, "Internal Error during Location Updating attempt\n"); |
| 415 | msc_a_release_cn(msc_a); |
| 416 | msc_a_put(msc_a, __func__); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 417 | return -EIO; |
| 418 | } |
| 419 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 420 | vsub->classmark.classmark1 = lu->classmark1; |
| 421 | vsub->classmark.classmark1_set = true; |
| 422 | msc_a_put(msc_a, __func__); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 423 | return 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 424 | } |
| 425 | |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 426 | /* Turn int into semi-octet representation: 98 => 0x89 */ |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 427 | /* FIXME: libosmocore/libosmogsm */ |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 428 | static uint8_t bcdify(uint8_t value) |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 429 | { |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 430 | uint8_t ret; |
| 431 | |
| 432 | ret = value / 10; |
| 433 | ret |= (value % 10) << 4; |
| 434 | |
| 435 | return ret; |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 436 | } |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 437 | |
Harald Welte | 0df904d | 2018-12-03 11:00:04 +0100 | [diff] [blame] | 438 | /* Generate a message buffer that contains a valid MM info message, |
| 439 | * See also 3GPP TS 24.008, chapter 9.2.15a */ |
| 440 | struct msgb *gsm48_create_mm_info(struct gsm_network *net) |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 441 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 442 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 MM INF"); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 443 | struct gsm48_hdr *gh; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 444 | uint8_t *ptr8; |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 445 | int name_len, name_pad; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 446 | |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 447 | time_t cur_t; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 448 | struct tm* gmt_time; |
| 449 | struct tm* local_time; |
| 450 | int tzunits; |
Jacob Erlbeck | f46e226 | 2014-01-07 15:05:16 +0100 | [diff] [blame] | 451 | int dst = 0; |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 452 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 453 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 454 | gh->proto_discr = GSM48_PDISC_MM; |
| 455 | gh->msg_type = GSM48_MT_MM_INFO; |
| 456 | |
| 457 | if (net->name_long) { |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 458 | #if 0 |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 459 | name_len = strlen(net->name_long); |
| 460 | /* 10.5.3.5a */ |
| 461 | ptr8 = msgb_put(msg, 3); |
| 462 | ptr8[0] = GSM48_IE_NAME_LONG; |
| 463 | ptr8[1] = name_len*2 +1; |
| 464 | ptr8[2] = 0x90; /* UCS2, no spare bits, no CI */ |
| 465 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 466 | ptr16 = (uint16_t *) msgb_put(msg, name_len*2); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 467 | for (i = 0; i < name_len; i++) |
Harald Welte | 179f064 | 2008-12-31 23:59:18 +0000 | [diff] [blame] | 468 | ptr16[i] = htons(net->name_long[i]); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 469 | |
| 470 | /* FIXME: Use Cell Broadcast, not UCS-2, since |
| 471 | * UCS-2 is only supported by later revisions of the spec */ |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 472 | #endif |
| 473 | name_len = (strlen(net->name_long)*7)/8; |
| 474 | name_pad = (8 - strlen(net->name_long)*7)%8; |
| 475 | if (name_pad > 0) |
| 476 | name_len++; |
| 477 | /* 10.5.3.5a */ |
| 478 | ptr8 = msgb_put(msg, 3); |
| 479 | ptr8[0] = GSM48_IE_NAME_LONG; |
| 480 | ptr8[1] = name_len +1; |
| 481 | ptr8[2] = 0x80 | name_pad; /* Cell Broadcast DCS, no CI */ |
| 482 | |
| 483 | ptr8 = msgb_put(msg, name_len); |
Harald Welte | 5468f76 | 2015-01-01 12:41:17 +0100 | [diff] [blame] | 484 | gsm_7bit_encode_n(ptr8, name_len, net->name_long, NULL); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 485 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | if (net->name_short) { |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 489 | #if 0 |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 490 | name_len = strlen(net->name_short); |
| 491 | /* 10.5.3.5a */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 492 | ptr8 = (uint8_t *) msgb_put(msg, 3); |
Harald Welte | 7543eb7 | 2009-07-19 17:51:36 +0200 | [diff] [blame] | 493 | ptr8[0] = GSM48_IE_NAME_SHORT; |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 494 | ptr8[1] = name_len*2 + 1; |
| 495 | ptr8[2] = 0x90; /* UCS2, no spare bits, no CI */ |
| 496 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 497 | ptr16 = (uint16_t *) msgb_put(msg, name_len*2); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 498 | for (i = 0; i < name_len; i++) |
Harald Welte | 179f064 | 2008-12-31 23:59:18 +0000 | [diff] [blame] | 499 | ptr16[i] = htons(net->name_short[i]); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 500 | #endif |
| 501 | name_len = (strlen(net->name_short)*7)/8; |
| 502 | name_pad = (8 - strlen(net->name_short)*7)%8; |
| 503 | if (name_pad > 0) |
| 504 | name_len++; |
| 505 | /* 10.5.3.5a */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 506 | ptr8 = (uint8_t *) msgb_put(msg, 3); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 507 | ptr8[0] = GSM48_IE_NAME_SHORT; |
| 508 | ptr8[1] = name_len +1; |
| 509 | ptr8[2] = 0x80 | name_pad; /* Cell Broadcast DCS, no CI */ |
| 510 | |
| 511 | ptr8 = msgb_put(msg, name_len); |
Harald Welte | 5468f76 | 2015-01-01 12:41:17 +0100 | [diff] [blame] | 512 | gsm_7bit_encode_n(ptr8, name_len, net->name_short, NULL); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 513 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 514 | } |
| 515 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 516 | /* Section 10.5.3.9 */ |
| 517 | cur_t = time(NULL); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 518 | gmt_time = gmtime(&cur_t); |
| 519 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 520 | ptr8 = msgb_put(msg, 8); |
| 521 | ptr8[0] = GSM48_IE_NET_TIME_TZ; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 522 | ptr8[1] = bcdify(gmt_time->tm_year % 100); |
| 523 | ptr8[2] = bcdify(gmt_time->tm_mon + 1); |
| 524 | ptr8[3] = bcdify(gmt_time->tm_mday); |
| 525 | ptr8[4] = bcdify(gmt_time->tm_hour); |
| 526 | ptr8[5] = bcdify(gmt_time->tm_min); |
| 527 | ptr8[6] = bcdify(gmt_time->tm_sec); |
| 528 | |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 529 | if (net->tz.override) { |
Harald Welte | 45f9171 | 2012-07-08 16:48:11 +0200 | [diff] [blame] | 530 | /* Convert tz.hr and tz.mn to units */ |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 531 | if (net->tz.hr < 0) { |
| 532 | tzunits = ((net->tz.hr/-1)*4); |
| 533 | tzunits = tzunits + (net->tz.mn/15); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 534 | ptr8[7] = bcdify(tzunits); |
| 535 | /* Set negative time */ |
| 536 | ptr8[7] |= 0x08; |
| 537 | } |
| 538 | else { |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 539 | tzunits = net->tz.hr*4; |
| 540 | tzunits = tzunits + (net->tz.mn/15); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 541 | ptr8[7] = bcdify(tzunits); |
| 542 | } |
Jacob Erlbeck | f46e226 | 2014-01-07 15:05:16 +0100 | [diff] [blame] | 543 | /* Convert DST value */ |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 544 | if (net->tz.dst >= 0 && net->tz.dst <= 2) |
| 545 | dst = net->tz.dst; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 546 | } |
| 547 | else { |
| 548 | /* Need to get GSM offset and convert into 15 min units */ |
| 549 | /* This probably breaks if gmtoff returns a value not evenly divisible by 15? */ |
Harald Welte | 9c3dc90 | 2012-04-08 16:59:24 +0200 | [diff] [blame] | 550 | #ifdef HAVE_TM_GMTOFF_IN_TM |
Benoit Bolsee | 38bb344 | 2017-07-05 12:57:16 +0200 | [diff] [blame] | 551 | local_time = localtime(&cur_t); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 552 | tzunits = (local_time->tm_gmtoff/60)/15; |
Harald Welte | 9c3dc90 | 2012-04-08 16:59:24 +0200 | [diff] [blame] | 553 | #else |
Benoit Bolsee | 38bb344 | 2017-07-05 12:57:16 +0200 | [diff] [blame] | 554 | /* find timezone offset */ |
| 555 | time_t utc; |
| 556 | double offsetFromUTC; |
| 557 | utc = mktime(gmt_time); |
| 558 | local_time = localtime(&cur_t); |
| 559 | offsetFromUTC = difftime(cur_t, utc); |
| 560 | if (local_time->tm_isdst) |
| 561 | offsetFromUTC += 3600.0; |
| 562 | tzunits = ((int)offsetFromUTC) / 60 / 15; |
Harald Welte | 9c3dc90 | 2012-04-08 16:59:24 +0200 | [diff] [blame] | 563 | #endif |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 564 | if (tzunits < 0) { |
| 565 | tzunits = tzunits/-1; |
| 566 | ptr8[7] = bcdify(tzunits); |
| 567 | /* Flip it to negative */ |
| 568 | ptr8[7] |= 0x08; |
| 569 | } |
| 570 | else |
| 571 | ptr8[7] = bcdify(tzunits); |
Jacob Erlbeck | f46e226 | 2014-01-07 15:05:16 +0100 | [diff] [blame] | 572 | |
| 573 | /* Does not support DST +2 */ |
| 574 | if (local_time->tm_isdst) |
| 575 | dst = 1; |
| 576 | } |
| 577 | |
| 578 | if (dst) { |
| 579 | ptr8 = msgb_put(msg, 3); |
| 580 | ptr8[0] = GSM48_IE_NET_DST; |
| 581 | ptr8[1] = 1; |
| 582 | ptr8[2] = dst; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 583 | } |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 584 | |
Harald Welte | 0df904d | 2018-12-03 11:00:04 +0100 | [diff] [blame] | 585 | return msg; |
| 586 | } |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 587 | |
Harald Welte | 0df904d | 2018-12-03 11:00:04 +0100 | [diff] [blame] | 588 | /* Section 9.2.15a */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 589 | int gsm48_tx_mm_info(struct msc_a *msc_a) |
Harald Welte | 0df904d | 2018-12-03 11:00:04 +0100 | [diff] [blame] | 590 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 591 | struct gsm_network *net = msc_a_net(msc_a); |
Harald Welte | 0df904d | 2018-12-03 11:00:04 +0100 | [diff] [blame] | 592 | struct msgb *msg; |
| 593 | |
| 594 | msg = gsm48_create_mm_info(net); |
| 595 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 596 | LOG_MSC_A(msc_a, LOGL_DEBUG, "Tx MM INFO\n"); |
| 597 | return msc_a_tx_dtap_to_i(msc_a, msg); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 598 | } |
| 599 | |
Neels Hofmeyr | c036b79 | 2018-11-29 22:37:51 +0100 | [diff] [blame] | 600 | /*! Send an Authentication Request to MS on the given RAN connection |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 601 | * according to 3GPP/ETSI TS 24.008, Section 9.2.2. |
| 602 | * \param[in] conn Subscriber connection to send on. |
| 603 | * \param[in] rand Random challenge token to send, must be 16 bytes long. |
| 604 | * \param[in] autn r99: In case of UMTS mutual authentication, AUTN token to |
| 605 | * send; must be 16 bytes long, or pass NULL for plain GSM auth. |
| 606 | * \param[in] key_seq auth tuple's sequence number. |
| 607 | */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 608 | int gsm48_tx_mm_auth_req(struct msc_a *msc_a, uint8_t *rand, |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 609 | uint8_t *autn, int key_seq) |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 610 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 611 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH REQ"); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 612 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
Sylvain Munaut | 849f554 | 2009-09-27 11:10:17 +0200 | [diff] [blame] | 613 | struct gsm48_auth_req *ar = (struct gsm48_auth_req *) msgb_put(msg, sizeof(*ar)); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 614 | |
Neels Hofmeyr | 46c06e2 | 2019-01-04 17:42:05 +0100 | [diff] [blame] | 615 | DEBUGP(DMM, "Tx AUTH REQ (rand = %s)\n", osmo_hexdump_nospc(rand, 16)); |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 616 | if (autn) |
Neels Hofmeyr | 3355fd6 | 2017-02-14 17:42:25 +0100 | [diff] [blame] | 617 | DEBUGP(DMM, " AUTH REQ (autn = %s)\n", osmo_hexdump_nospc(autn, 16)); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 618 | |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 619 | gh->proto_discr = GSM48_PDISC_MM; |
| 620 | gh->msg_type = GSM48_MT_MM_AUTH_REQ; |
| 621 | |
Sylvain Munaut | bd55a6d | 2009-12-24 00:23:46 +0100 | [diff] [blame] | 622 | ar->key_seq = key_seq; |
Sylvain Munaut | 849f554 | 2009-09-27 11:10:17 +0200 | [diff] [blame] | 623 | |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 624 | /* 16 bytes RAND parameters */ |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 625 | osmo_static_assert(sizeof(ar->rand) == 16, sizeof_auth_req_r99_rand); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 626 | if (rand) |
Sylvain Munaut | 849f554 | 2009-09-27 11:10:17 +0200 | [diff] [blame] | 627 | memcpy(ar->rand, rand, 16); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 628 | |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 629 | |
| 630 | /* 16 bytes AUTN */ |
| 631 | if (autn) |
| 632 | msgb_tlv_put(msg, GSM48_IE_AUTN, 16, autn); |
| 633 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 634 | return msc_a_tx_dtap_to_i(msc_a, msg); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | /* Section 9.2.1 */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 638 | int gsm48_tx_mm_auth_rej(struct msc_a *msc_a) |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 639 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 640 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "-> AUTH REJECT\n"); |
| 641 | return gsm48_tx_simple(msc_a, GSM48_PDISC_MM, GSM48_MT_MM_AUTH_REJ); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 642 | } |
| 643 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 644 | static int msc_vlr_tx_cm_serv_rej(void *msc_conn_ref, enum osmo_cm_service_type cm_service_type, |
| 645 | enum gsm48_reject_value cause); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 646 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 647 | static int cm_serv_reuse_conn(struct msc_a *msc_a, const uint8_t *mi_lv, enum osmo_cm_service_type cm_serv_type) |
Holger Hans Peter Freyther | 2147bc4 | 2013-12-27 17:19:19 +0100 | [diff] [blame] | 648 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 649 | uint8_t mi_type; |
| 650 | char mi_string[GSM48_MI_SIZE]; |
| 651 | uint32_t tmsi; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 652 | struct gsm_network *net = msc_a_net(msc_a); |
| 653 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
Holger Hans Peter Freyther | 2147bc4 | 2013-12-27 17:19:19 +0100 | [diff] [blame] | 654 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 655 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi_lv+1, mi_lv[0]); |
| 656 | mi_type = mi_lv[1] & GSM_MI_TYPE_MASK; |
Holger Hans Peter Freyther | 2147bc4 | 2013-12-27 17:19:19 +0100 | [diff] [blame] | 657 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 658 | switch (mi_type) { |
| 659 | case GSM_MI_TYPE_IMSI: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 660 | if (vlr_subscr_matches_imsi(vsub, mi_string)) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 661 | goto accept_reuse; |
| 662 | break; |
| 663 | case GSM_MI_TYPE_TMSI: |
| 664 | tmsi = osmo_load32be(mi_lv+2); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 665 | if (vlr_subscr_matches_tmsi(vsub, tmsi)) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 666 | goto accept_reuse; |
| 667 | break; |
| 668 | case GSM_MI_TYPE_IMEI: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 669 | if (vlr_subscr_matches_imei(vsub, mi_string)) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 670 | goto accept_reuse; |
| 671 | break; |
| 672 | default: |
| 673 | break; |
| 674 | } |
Holger Hans Peter Freyther | 2147bc4 | 2013-12-27 17:19:19 +0100 | [diff] [blame] | 675 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 676 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "CM Service Request with mismatching mobile identity: %s %s\n", |
| 677 | gsm48_mi_type_name(mi_type), mi_string); |
| 678 | msc_vlr_tx_cm_serv_rej(msc_a, cm_serv_type, GSM48_REJECT_ILLEGAL_MS); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 679 | return -EINVAL; |
Sylvain Munaut | ba87f45 | 2009-12-24 00:28:46 +0100 | [diff] [blame] | 680 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 681 | accept_reuse: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 682 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "re-using already accepted connection\n"); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 683 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 684 | msc_a_get(msc_a, msc_a_cm_service_type_to_use(cm_serv_type)); |
| 685 | msub_update_id(msc_a->c.msub); |
| 686 | return net->vlr->ops.tx_cm_serv_acc(msc_a, cm_serv_type); |
Sylvain Munaut | ba87f45 | 2009-12-24 00:28:46 +0100 | [diff] [blame] | 687 | } |
| 688 | |
Harald Welte | 4ed0e92 | 2009-01-10 03:17:30 +0000 | [diff] [blame] | 689 | /* |
| 690 | * Handle CM Service Requests |
| 691 | * a) Verify that the packet is long enough to contain the information |
| 692 | * we require otherwsie reject with INCORRECT_MESSAGE |
| 693 | * b) Try to parse the TMSI. If we do not have one reject |
| 694 | * c) Check that we know the subscriber with the TMSI otherwise reject |
| 695 | * with a HLR cause |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 696 | * d) Set the subscriber on the conn and accept |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 697 | * |
| 698 | * Keep this function non-static for direct invocation by unit tests. |
Harald Welte | 4ed0e92 | 2009-01-10 03:17:30 +0000 | [diff] [blame] | 699 | */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 700 | int gsm48_rx_mm_serv_req(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 701 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 702 | struct gsm_network *net = msc_a_net(msc_a); |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 703 | struct gsm48_hdr *gh; |
| 704 | struct gsm48_service_request *req; |
| 705 | struct gsm48_classmark2 *cm2; |
| 706 | uint8_t *cm2_buf, cm2_len; |
| 707 | uint8_t *mi_buf, mi_len; |
| 708 | uint8_t *mi, mi_type; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 709 | bool is_utran; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 710 | struct vlr_subscr *vsub; |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 711 | |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 712 | /* Make sure that both header and CM Service Request fit into the buffer */ |
| 713 | if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*req)) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 714 | LOG_MSC_A(msc_a, LOGL_ERROR, "Rx CM SERVICE REQUEST: wrong message size (%u < %zu)\n", |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 715 | msgb_l3len(msg), sizeof(*gh) + sizeof(*req)); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 716 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_INCORRECT_MESSAGE); |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 717 | } |
| 718 | |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 719 | gh = (struct gsm48_hdr *) msgb_l3(msg); |
| 720 | req = (struct gsm48_service_request *) gh->data; |
| 721 | |
| 722 | /* Unfortunately in Phase1 the Classmark2 length is variable, so we cannot |
| 723 | * just use gsm48_service_request struct, and need to parse it manually. */ |
| 724 | cm2_len = gh->data[1]; |
| 725 | cm2_buf = gh->data + 2; |
| 726 | cm2 = (struct gsm48_classmark2 *) cm2_buf; |
| 727 | |
| 728 | /* Prevent buffer overrun: check the length of Classmark2 */ |
| 729 | if (cm2_buf + cm2_len > msg->tail) { |
| 730 | LOG_MSC_A(msc_a, LOGL_ERROR, "Rx CM SERVICE REQUEST: Classmark2 " |
| 731 | "length=%u is too big\n", cm2_len); |
| 732 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_INCORRECT_MESSAGE); |
| 733 | } |
| 734 | |
| 735 | /* MI (Mobile Identity) LV follows the Classmark2 */ |
| 736 | mi_buf = cm2_buf + cm2_len; |
| 737 | mi_len = mi_buf[0]; |
| 738 | mi = mi_buf + 1; |
| 739 | |
| 740 | /* Prevent buffer overrun: check the length of MI */ |
| 741 | if (mi_buf + mi_len > msg->tail) { |
| 742 | LOG_MSC_A(msc_a, LOGL_ERROR, "Rx CM SERVICE REQUEST: Mobile Identity " |
| 743 | "length=%u is too big\n", cm2_len); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 744 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_INCORRECT_MESSAGE); |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 745 | } |
| 746 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 747 | if (msc_a_is_establishing_auth_ciph(msc_a)) { |
| 748 | LOG_MSC_A(msc_a, LOGL_ERROR, |
| 749 | "Cannot accept CM Service Request, conn already busy establishing authenticity\n"); |
| 750 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_CONGESTION); |
Neels Hofmeyr | 7ce21dc | 2019-01-04 17:42:05 +0100 | [diff] [blame] | 751 | /* or should we accept and note down the service request anyway? */ |
| 752 | } |
| 753 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 754 | msc_a->complete_layer3_type = COMPLETE_LAYER3_CM_SERVICE_REQ; |
| 755 | msub_update_id_from_mi(msc_a->c.msub, mi, mi_len); |
| 756 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "Rx CM SERVICE REQUEST cm_service_type=%s\n", |
| 757 | osmo_cm_service_type_name(req->cm_service_type)); |
Neels Hofmeyr | 46c06e2 | 2019-01-04 17:42:05 +0100 | [diff] [blame] | 758 | |
Neels Hofmeyr | 361e571 | 2019-01-03 02:32:14 +0100 | [diff] [blame] | 759 | mi_type = (mi && mi_len) ? (mi[0] & GSM_MI_TYPE_MASK) : GSM_MI_TYPE_NONE; |
Harald Welte | 3995d2e | 2018-01-24 11:23:54 +0100 | [diff] [blame] | 760 | switch (mi_type) { |
| 761 | case GSM_MI_TYPE_IMSI: |
| 762 | case GSM_MI_TYPE_TMSI: |
| 763 | /* continue below */ |
| 764 | break; |
| 765 | case GSM_MI_TYPE_IMEI: |
| 766 | if (req->cm_service_type == GSM48_CMSERV_EMERGENCY) { |
| 767 | /* We don't do emergency calls by IMEI */ |
Vadim Yanitskiy | 4456065 | 2019-05-09 21:05:41 +0700 | [diff] [blame] | 768 | LOG_MSC_A(msc_a, LOGL_NOTICE, "Tx CM SERVICE REQUEST REJECT: " |
| 769 | "emergency services by IMEI are not supported\n"); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 770 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_IMEI_NOT_ACCEPTED); |
Harald Welte | 3995d2e | 2018-01-24 11:23:54 +0100 | [diff] [blame] | 771 | } |
| 772 | /* fall-through for non-emergency setup */ |
| 773 | default: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 774 | LOG_MSC_A(msc_a, LOGL_ERROR, "MI type is not expected: %s\n", gsm48_mi_type_name(mi_type)); |
| 775 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_INCORRECT_MESSAGE); |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 776 | } |
| 777 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 778 | if (!msc_a_cm_service_type_to_use(req->cm_service_type)) |
| 779 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_SRV_OPT_NOT_SUPPORTED); |
Harald Welte | 37382ec | 2018-01-24 12:49:34 +0100 | [diff] [blame] | 780 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 781 | if (msc_a_is_accepted(msc_a)) |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 782 | return cm_serv_reuse_conn(msc_a, mi_buf, req->cm_service_type); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 783 | |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 784 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, mi_buf); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 785 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 786 | msc_a_get(msc_a, msc_a_cm_service_type_to_use(req->cm_service_type)); |
| 787 | |
| 788 | is_utran = (msc_a->c.ran->type == OSMO_RAT_UTRAN_IU); |
| 789 | vlr_proc_acc_req(msc_a->c.fi, |
| 790 | MSC_A_EV_AUTHENTICATED, MSC_A_EV_CN_CLOSE, NULL, |
| 791 | net->vlr, msc_a, |
| 792 | VLR_PR_ARQ_T_CM_SERV_REQ, |
| 793 | req->cm_service_type, |
| 794 | mi-1, &msc_a->via_cell.lai, |
| 795 | is_utran || net->authentication_required, |
| 796 | is_utran || net->a5_encryption_mask > 0x01, |
Sylvain Munaut | da9f37e | 2019-03-14 11:02:36 +0100 | [diff] [blame] | 797 | req->cipher_key_seq, |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 798 | osmo_gsm48_classmark2_is_r99(cm2, cm2_len), |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 799 | is_utran); |
Holger Freyther | eb44398 | 2009-06-04 13:58:42 +0000 | [diff] [blame] | 800 | |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 801 | /* From vlr_proc_acc_req() we expect an implicit dispatch of PR_ARQ_E_START we expect |
| 802 | * msc_vlr_subscr_assoc() to already have been called and completed. Has an error occured? */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 803 | vsub = msc_a_vsub(msc_a); |
| 804 | if (!vsub) { |
| 805 | LOG_MSC_A(msc_a, LOGL_ERROR, "subscriber not allowed to do a CM Service Request\n"); |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 806 | return -EIO; |
| 807 | } |
| 808 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 809 | vsub->classmark.classmark2 = *cm2; |
Vadim Yanitskiy | b380a8c | 2019-05-08 16:11:29 +0700 | [diff] [blame] | 810 | vsub->classmark.classmark2_len = cm2_len; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 811 | return 0; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 812 | } |
| 813 | |
Harald Welte | 49f8fcb | 2018-01-24 21:40:19 +0100 | [diff] [blame] | 814 | /* Receive a CM Re-establish Request */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 815 | static int gsm48_rx_cm_reest_req(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 49f8fcb | 2018-01-24 21:40:19 +0100 | [diff] [blame] | 816 | { |
| 817 | uint8_t mi_type; |
| 818 | char mi_string[GSM48_MI_SIZE]; |
| 819 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 820 | |
| 821 | uint8_t classmark2_len = gh->data[1]; |
| 822 | uint8_t *classmark2 = gh->data+2; |
| 823 | uint8_t mi_len = *(classmark2 + classmark2_len); |
| 824 | uint8_t *mi = (classmark2 + classmark2_len + 1); |
| 825 | |
| 826 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 827 | mi_type = mi[0] & GSM_MI_TYPE_MASK; |
| 828 | DEBUGP(DMM, "<- CM RE-ESTABLISH REQUEST MI(%s)=%s\n", gsm48_mi_type_name(mi_type), mi_string); |
| 829 | |
| 830 | /* we don't support CM call re-establishment */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 831 | return msc_gsm48_tx_mm_serv_rej(msc_a, GSM48_REJECT_SRV_OPT_NOT_SUPPORTED); |
Harald Welte | 49f8fcb | 2018-01-24 21:40:19 +0100 | [diff] [blame] | 832 | } |
| 833 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 834 | static int gsm48_rx_mm_imsi_detach_ind(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 835 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 836 | struct gsm_network *net = msc_a_net(msc_a); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 837 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 838 | struct gsm48_imsi_detach_ind *idi = |
| 839 | (struct gsm48_imsi_detach_ind *) gh->data; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 840 | uint8_t mi_type = idi->mi[0] & GSM_MI_TYPE_MASK; |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 841 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 842 | struct vlr_subscr *vsub = NULL; |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 843 | |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 844 | gsm48_mi_to_string(mi_string, sizeof(mi_string), idi->mi, idi->mi_len); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 845 | DEBUGP(DMM, "IMSI DETACH INDICATION: MI(%s)=%s\n", |
| 846 | gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 847 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 848 | rate_ctr_inc(&net->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_DETACH]); |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 849 | |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 850 | switch (mi_type) { |
| 851 | case GSM_MI_TYPE_TMSI: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 852 | vsub = vlr_subscr_find_by_tmsi(net->vlr, |
Neels Hofmeyr | 7c5346c | 2019-02-19 02:36:35 +0100 | [diff] [blame] | 853 | tmsi_from_string(mi_string), __func__); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 854 | break; |
| 855 | case GSM_MI_TYPE_IMSI: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 856 | vsub = vlr_subscr_find_by_imsi(net->vlr, mi_string, __func__); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 857 | break; |
| 858 | case GSM_MI_TYPE_IMEI: |
| 859 | case GSM_MI_TYPE_IMEISV: |
| 860 | /* no sim card... FIXME: what to do ? */ |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 861 | LOGP(DMM, LOGL_ERROR, "MI(%s)=%s: unimplemented mobile identity type\n", |
| 862 | gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 863 | break; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 864 | default: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 865 | LOGP(DMM, LOGL_ERROR, "MI(%s)=%s: unknown mobile identity type\n", |
| 866 | gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 867 | break; |
| 868 | } |
| 869 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 870 | if (!vsub) { |
| 871 | LOGP(DMM, LOGL_ERROR, "IMSI DETACH for unknown subscriber MI(%s)=%s\n", |
| 872 | gsm48_mi_type_name(mi_type), mi_string); |
| 873 | } else { |
| 874 | LOGP(DMM, LOGL_INFO, "IMSI DETACH for %s\n", vlr_subscr_name(vsub)); |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 875 | msub_set_vsub(msc_a->c.msub, vsub); |
Neels Hofmeyr | facd57a | 2017-12-15 03:48:48 +0100 | [diff] [blame] | 876 | |
| 877 | if (vsub->cs.is_paging) |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 878 | paging_expired(vsub); |
Neels Hofmeyr | facd57a | 2017-12-15 03:48:48 +0100 | [diff] [blame] | 879 | |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 880 | vsub->classmark.classmark1 = idi->classmark1; |
| 881 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 882 | vlr_subscr_rx_imsi_detach(vsub); |
| 883 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_DETACHED, vsub); |
Neels Hofmeyr | 7c5346c | 2019-02-19 02:36:35 +0100 | [diff] [blame] | 884 | vlr_subscr_put(vsub, __func__); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 885 | } |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 886 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 887 | msc_a_release_cn(msc_a); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 888 | return 0; |
| 889 | } |
| 890 | |
Harald Welte | d2a7f5a | 2009-06-05 20:08:20 +0000 | [diff] [blame] | 891 | static int gsm48_rx_mm_status(struct msgb *msg) |
| 892 | { |
| 893 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 894 | |
| 895 | DEBUGP(DMM, "MM STATUS (reject cause 0x%02x)\n", gh->data[0]); |
| 896 | |
| 897 | return 0; |
| 898 | } |
| 899 | |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 900 | static int parse_gsm_auth_resp(uint8_t *res, uint8_t *res_len, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 901 | struct msc_a *msc_a, |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 902 | struct msgb *msg) |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 903 | { |
| 904 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 905 | struct gsm48_auth_resp *ar = (struct gsm48_auth_resp*) gh->data; |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 906 | |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 907 | if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*ar)) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 908 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "MM AUTHENTICATION RESPONSE: l3 length invalid: %u\n", |
| 909 | msgb_l3len(msg)); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 910 | return -EINVAL; |
| 911 | } |
| 912 | |
| 913 | *res_len = sizeof(ar->sres); |
| 914 | memcpy(res, ar->sres, sizeof(ar->sres)); |
| 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | static int parse_umts_auth_resp(uint8_t *res, uint8_t *res_len, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 919 | struct msc_a *msc_a, |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 920 | struct msgb *msg) |
| 921 | { |
| 922 | struct gsm48_hdr *gh; |
| 923 | uint8_t *data; |
| 924 | uint8_t iei; |
| 925 | uint8_t ie_len; |
| 926 | unsigned int data_len; |
| 927 | |
| 928 | /* First parse the GSM part */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 929 | if (parse_gsm_auth_resp(res, res_len, msc_a, msg)) |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 930 | return -EINVAL; |
| 931 | OSMO_ASSERT(*res_len == 4); |
| 932 | |
| 933 | /* Then add the extended res part */ |
| 934 | gh = msgb_l3(msg); |
| 935 | data = gh->data + sizeof(struct gsm48_auth_resp); |
| 936 | data_len = msgb_l3len(msg) - (data - (uint8_t*)msgb_l3(msg)); |
| 937 | |
| 938 | if (data_len < 3) { |
Vadim Yanitskiy | 2fca80e | 2019-05-08 16:53:23 +0700 | [diff] [blame] | 939 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "MM AUTHENTICATION RESPONSE: " |
| 940 | "message length=%u is too short\n", data_len); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 941 | return -EINVAL; |
| 942 | } |
| 943 | |
| 944 | iei = data[0]; |
| 945 | ie_len = data[1]; |
| 946 | if (iei != GSM48_IE_AUTH_RES_EXT) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 947 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "MM R99 AUTHENTICATION RESPONSE: expected IEI 0x%02x, got 0x%02x\n", |
| 948 | GSM48_IE_AUTH_RES_EXT, iei); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 949 | return -EINVAL; |
| 950 | } |
| 951 | |
| 952 | if (ie_len > 12) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 953 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, |
| 954 | "MM R99 AUTHENTICATION RESPONSE: extended Auth Resp IE 0x%02x is too large: %u bytes\n", |
| 955 | GSM48_IE_AUTH_RES_EXT, ie_len); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 956 | return -EINVAL; |
| 957 | } |
| 958 | |
| 959 | *res_len += ie_len; |
| 960 | memcpy(res + 4, &data[2], ie_len); |
| 961 | return 0; |
| 962 | } |
| 963 | |
| 964 | /* Chapter 9.2.3: Authentication Response */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 965 | static int gsm48_rx_mm_auth_resp(struct msc_a *msc_a, struct msgb *msg) |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 966 | { |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 967 | uint8_t res[16]; |
| 968 | uint8_t res_len; |
| 969 | int rc; |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 970 | bool is_umts; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 971 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 972 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 973 | if (!vsub) { |
| 974 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "MM AUTHENTICATION RESPONSE: invalid: no subscriber\n"); |
| 975 | msc_a_release_mo(msc_a, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 976 | return -EINVAL; |
| 977 | } |
| 978 | |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 979 | is_umts = (msgb_l3len(msg) > sizeof(struct gsm48_hdr) + sizeof(struct gsm48_auth_resp)); |
| 980 | |
| 981 | if (is_umts) |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 982 | rc = parse_umts_auth_resp(res, &res_len, msc_a, msg); |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 983 | else |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 984 | rc = parse_gsm_auth_resp(res, &res_len, msc_a, msg); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 985 | |
| 986 | if (rc) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 987 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, |
| 988 | "MM AUTHENTICATION RESPONSE: invalid: parsing %s AKA Auth Response" |
| 989 | " failed with rc=%d; dispatching zero length SRES/RES to trigger failure\n", |
| 990 | is_umts ? "UMTS" : "GSM", rc); |
Neels Hofmeyr | 8e0af0b | 2018-03-10 03:32:18 +0100 | [diff] [blame] | 991 | memset(res, 0, sizeof(res)); |
| 992 | res_len = 0; |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 993 | } |
| 994 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 995 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "MM %s AUTHENTICATION RESPONSE (%s = %s)\n", |
| 996 | is_umts ? "UMTS" : "GSM", is_umts ? "res" : "sres", |
| 997 | osmo_hexdump_nospc(res, res_len)); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 998 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 999 | return vlr_subscr_rx_auth_resp(vsub, osmo_gsm48_classmark_is_r99(&vsub->classmark), |
| 1000 | msc_a->c.ran->type == OSMO_RAT_UTRAN_IU, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1001 | res, res_len); |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 1002 | } |
| 1003 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1004 | static int gsm48_rx_mm_auth_fail(struct msc_a *msc_a, struct msgb *msg) |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1005 | { |
| 1006 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1007 | uint8_t cause; |
| 1008 | uint8_t auts_tag; |
| 1009 | uint8_t auts_len; |
| 1010 | uint8_t *auts; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1011 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1012 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1013 | if (!vsub) { |
| 1014 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "MM R99 AUTHENTICATION FAILURE: invalid: no subscriber\n"); |
| 1015 | msc_a_release_mo(msc_a, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1016 | return -EINVAL; |
| 1017 | } |
| 1018 | |
| 1019 | if (msgb_l3len(msg) < sizeof(*gh) + 1) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1020 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "MM R99 AUTHENTICATION FAILURE: l3 length invalid: %u\n", |
| 1021 | msgb_l3len(msg)); |
| 1022 | msc_a_release_mo(msc_a, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1023 | return -EINVAL; |
| 1024 | } |
| 1025 | |
| 1026 | cause = gh->data[0]; |
| 1027 | |
| 1028 | if (cause != GSM48_REJECT_SYNCH_FAILURE) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1029 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_INFO, "MM R99 AUTHENTICATION FAILURE: cause 0x%0x\n", cause); |
| 1030 | vlr_subscr_rx_auth_fail(vsub, NULL); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1031 | return 0; |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | /* This is a Synch Failure procedure, which should pass an AUTS to |
| 1035 | * resynchronize the sequence nr with the HLR. Expecting exactly one |
| 1036 | * TLV with 14 bytes of AUTS. */ |
| 1037 | |
| 1038 | if (msgb_l3len(msg) < sizeof(*gh) + 1 + 2) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1039 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_INFO, |
| 1040 | "MM R99 AUTHENTICATION FAILURE: invalid Synch Failure: missing AUTS IE\n"); |
| 1041 | msc_a_release_mo(msc_a, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1042 | return -EINVAL; |
| 1043 | } |
| 1044 | |
| 1045 | auts_tag = gh->data[1]; |
| 1046 | auts_len = gh->data[2]; |
| 1047 | auts = &gh->data[3]; |
| 1048 | |
| 1049 | if (auts_tag != GSM48_IE_AUTS |
| 1050 | || auts_len != 14) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1051 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_INFO, |
| 1052 | "MM R99 AUTHENTICATION FAILURE: invalid Synch Failure:" |
| 1053 | " expected AUTS IE 0x%02x of 14 bytes," |
| 1054 | " got IE 0x%02x of %u bytes\n", |
| 1055 | GSM48_IE_AUTS, auts_tag, auts_len); |
| 1056 | msc_a_release_mo(msc_a, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1057 | return -EINVAL; |
| 1058 | } |
| 1059 | |
| 1060 | if (msgb_l3len(msg) < sizeof(*gh) + 1 + 2 + auts_len) { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1061 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_INFO, |
| 1062 | "MM R99 AUTHENTICATION FAILURE: invalid Synch Failure msg: message truncated (%u)\n", |
| 1063 | msgb_l3len(msg)); |
| 1064 | msc_a_release_mo(msc_a, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1065 | return -EINVAL; |
| 1066 | } |
| 1067 | |
| 1068 | /* We have an AUTS IE with exactly 14 bytes of AUTS and the msgb is |
| 1069 | * large enough. */ |
| 1070 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1071 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "MM R99 AUTHENTICATION SYNCH (AUTS = %s)\n", |
| 1072 | osmo_hexdump_nospc(auts, 14)); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1073 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1074 | return vlr_subscr_rx_auth_fail(vsub, auts); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1075 | } |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1076 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1077 | static int gsm48_rx_mm_tmsi_reall_compl(struct msc_a *msc_a) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1078 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1079 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
| 1080 | if (!vsub) { |
| 1081 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "Rx MM TMSI Reallocation Complete: invalid: no subscriber\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1082 | return -EINVAL; |
| 1083 | } |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1084 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_DEBUG, "TMSI Reallocation Completed\n"); |
| 1085 | return vlr_subscr_rx_tmsi_reall_compl(vsub); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1086 | } |
| 1087 | |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 1088 | /* Receive a GSM 04.08 Mobility Management (MM) message */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1089 | int gsm0408_rcv_mm(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1090 | { |
| 1091 | struct gsm48_hdr *gh = msgb_l3(msg); |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 1092 | int rc = 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1093 | |
Neels Hofmeyr | 531734a | 2016-03-14 16:13:24 +0100 | [diff] [blame] | 1094 | switch (gsm48_hdr_msg_type(gh)) { |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1095 | case GSM48_MT_MM_LOC_UPD_REQUEST: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1096 | rc = mm_rx_loc_upd_req(msc_a, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1097 | break; |
| 1098 | case GSM48_MT_MM_ID_RESP: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1099 | rc = mm_rx_id_resp(msc_a, msg); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 1100 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1101 | case GSM48_MT_MM_CM_SERV_REQ: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1102 | rc = gsm48_rx_mm_serv_req(msc_a, msg); |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 1103 | break; |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 1104 | case GSM48_MT_MM_STATUS: |
Harald Welte | d2a7f5a | 2009-06-05 20:08:20 +0000 | [diff] [blame] | 1105 | rc = gsm48_rx_mm_status(msg); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 1106 | break; |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 1107 | case GSM48_MT_MM_TMSI_REALL_COMPL: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1108 | rc = gsm48_rx_mm_tmsi_reall_compl(msc_a); |
Harald Welte | 69b2af2 | 2009-01-06 19:47:00 +0000 | [diff] [blame] | 1109 | break; |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 1110 | case GSM48_MT_MM_IMSI_DETACH_IND: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1111 | rc = gsm48_rx_mm_imsi_detach_ind(msc_a, msg); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 1112 | break; |
| 1113 | case GSM48_MT_MM_CM_REEST_REQ: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1114 | rc = gsm48_rx_cm_reest_req(msc_a, msg); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 1115 | break; |
| 1116 | case GSM48_MT_MM_AUTH_RESP: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1117 | rc = gsm48_rx_mm_auth_resp(msc_a, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1118 | break; |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1119 | case GSM48_MT_MM_AUTH_FAIL: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1120 | rc = gsm48_rx_mm_auth_fail(msc_a, msg); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1121 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1122 | default: |
Harald Welte | 5d24ba1 | 2009-12-24 12:13:17 +0100 | [diff] [blame] | 1123 | LOGP(DMM, LOGL_NOTICE, "Unknown GSM 04.08 MM msg type 0x%02x\n", |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1124 | gh->msg_type); |
| 1125 | break; |
| 1126 | } |
| 1127 | |
| 1128 | return rc; |
| 1129 | } |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 1130 | |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1131 | /* Receive a PAGING RESPONSE message from the MS */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1132 | static int gsm48_rx_rr_pag_resp(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1133 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1134 | struct gsm_network *net = msc_a_net(msc_a); |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1135 | struct gsm48_hdr *gh = msgb_l3(msg); |
Sylvain Munaut | da9f37e | 2019-03-14 11:02:36 +0100 | [diff] [blame] | 1136 | struct gsm48_pag_resp *pr = |
| 1137 | (struct gsm48_pag_resp *)gh->data; |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 1138 | uint8_t classmark2_len = gh->data[1]; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1139 | uint8_t *classmark2_buf = gh->data+2; |
| 1140 | struct gsm48_classmark2 *cm2 = (void*)classmark2_buf; |
| 1141 | uint8_t *mi_lv = classmark2_buf + classmark2_len; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1142 | bool is_utran; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1143 | struct vlr_subscr *vsub; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1144 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1145 | if (msc_a_is_establishing_auth_ciph(msc_a)) { |
| 1146 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, |
| 1147 | "Ignoring Paging Response, conn already busy establishing authenticity\n"); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1148 | return 0; |
| 1149 | } |
| 1150 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1151 | if (msc_a_is_accepted(msc_a)) { |
| 1152 | LOG_MSC_A_CAT(msc_a, DMM, LOGL_ERROR, "Ignoring Paging Response, conn already established\n"); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1153 | return 0; |
| 1154 | } |
| 1155 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1156 | msc_a->complete_layer3_type = COMPLETE_LAYER3_PAGING_RESP; |
| 1157 | msub_update_id_from_mi(msc_a->c.msub, mi_lv + 1, *mi_lv); |
| 1158 | LOG_MSC_A_CAT(msc_a, DRR, LOGL_DEBUG, "Rx PAGING RESPONSE\n"); |
Neels Hofmeyr | 6d804b1 | 2017-02-18 22:20:46 +0100 | [diff] [blame] | 1159 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1160 | msc_a_get(msc_a, MSC_A_USE_PAGING_RESPONSE); |
| 1161 | |
| 1162 | is_utran = (msc_a->c.ran->type == OSMO_RAT_UTRAN_IU); |
| 1163 | vlr_proc_acc_req(msc_a->c.fi, |
| 1164 | MSC_A_EV_AUTHENTICATED, MSC_A_EV_CN_CLOSE, NULL, |
| 1165 | net->vlr, msc_a, |
| 1166 | VLR_PR_ARQ_T_PAGING_RESP, 0, mi_lv, &msc_a->via_cell.lai, |
| 1167 | is_utran || net->authentication_required, |
| 1168 | is_utran || net->a5_encryption_mask > 0x01, |
Sylvain Munaut | da9f37e | 2019-03-14 11:02:36 +0100 | [diff] [blame] | 1169 | pr->key_seq, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1170 | osmo_gsm48_classmark2_is_r99(cm2, classmark2_len), |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1171 | is_utran); |
Holger Freyther | 053e09d | 2009-02-14 22:51:06 +0000 | [diff] [blame] | 1172 | |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 1173 | /* From vlr_proc_acc_req() we expect an implicit dispatch of PR_ARQ_E_START we expect |
| 1174 | * msc_vlr_subscr_assoc() to already have been called and completed. Has an error occured? */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1175 | vsub = msc_a_vsub(msc_a); |
| 1176 | if (!vsub) { |
| 1177 | LOG_MSC_A(msc_a, LOGL_ERROR, "subscriber not allowed to do a Paging Response\n"); |
| 1178 | msc_a_put(msc_a, MSC_A_USE_PAGING_RESPONSE); |
Neels Hofmeyr | 986fe7e | 2018-09-13 03:05:52 +0200 | [diff] [blame] | 1179 | return -EIO; |
| 1180 | } |
| 1181 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1182 | vsub->classmark.classmark2 = *cm2; |
| 1183 | vsub->classmark.classmark2_len = classmark2_len; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1184 | return 0; |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1185 | } |
| 1186 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1187 | static int gsm48_rx_rr_ciphering_mode_complete(struct msc_a *msc_a, struct msgb *msg) |
| 1188 | { |
| 1189 | struct vlr_subscr *vsub = msc_a_vsub(msc_a); |
| 1190 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1191 | unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| 1192 | struct tlv_parsed tp; |
| 1193 | struct tlv_p_entry *mi; |
| 1194 | |
| 1195 | tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| 1196 | mi = TLVP_GET(&tp, GSM48_IE_MOBILE_ID); |
| 1197 | |
| 1198 | if (!mi) |
| 1199 | return 0; |
| 1200 | |
| 1201 | LOG_MSC_A(msc_a, LOGL_DEBUG, "Ciphering Mode Complete contains Mobile Identity: %s\n", |
| 1202 | osmo_mi_name(mi->val, mi->len)); |
| 1203 | |
| 1204 | if (!vsub) |
| 1205 | return 0; |
| 1206 | |
| 1207 | return vlr_subscr_rx_id_resp(vsub, mi->val, mi->len); |
| 1208 | } |
| 1209 | |
| 1210 | static int gsm48_rx_rr_app_info(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1211 | { |
| 1212 | struct gsm48_hdr *gh = msgb_l3(msg); |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 1213 | uint8_t apdu_id_flags; |
| 1214 | uint8_t apdu_len; |
| 1215 | uint8_t *apdu_data; |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1216 | |
| 1217 | apdu_id_flags = gh->data[0]; |
| 1218 | apdu_len = gh->data[1]; |
| 1219 | apdu_data = gh->data+2; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 1220 | |
Max | 8dc8f23 | 2017-02-09 19:13:02 +0100 | [diff] [blame] | 1221 | DEBUGP(DRR, "RX APPLICATION INFO id/flags=0x%02x apdu_len=%u apdu=%s\n", |
Pablo Neira Ayuso | c0d17f2 | 2011-05-07 12:12:48 +0200 | [diff] [blame] | 1222 | apdu_id_flags, apdu_len, osmo_hexdump(apdu_data, apdu_len)); |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1223 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1224 | /* we're not using the app info blob anywhere, so ignore. */ |
| 1225 | #if 0 |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1226 | return db_apdu_blob_store(conn->subscr, apdu_id_flags, apdu_len, apdu_data); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1227 | #else |
| 1228 | return 0; |
| 1229 | #endif |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1230 | } |
| 1231 | |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 1232 | /* Receive a GSM 04.08 Radio Resource (RR) message */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1233 | int gsm0408_rcv_rr(struct msc_a *msc_a, struct msgb *msg) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1234 | { |
| 1235 | struct gsm48_hdr *gh = msgb_l3(msg); |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1236 | int rc = 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1237 | |
| 1238 | switch (gh->msg_type) { |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1239 | case GSM48_MT_RR_PAG_RESP: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1240 | rc = gsm48_rx_rr_pag_resp(msc_a, msg); |
| 1241 | break; |
| 1242 | case GSM48_MT_RR_CIPH_M_COMPL: |
| 1243 | rc = gsm48_rx_rr_ciphering_mode_complete(msc_a, msg); |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1244 | break; |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1245 | case GSM48_MT_RR_APP_INFO: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1246 | rc = gsm48_rx_rr_app_info(msc_a, msg); |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1247 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1248 | default: |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1249 | LOG_MSC_A_CAT(msc_a, DRR, LOGL_NOTICE, "MSC: Unimplemented %s GSM 04.08 RR " |
| 1250 | "message\n", gsm48_rr_msg_name(gh->msg_type)); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1251 | break; |
| 1252 | } |
| 1253 | |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1254 | return rc; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1255 | } |
| 1256 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1257 | int gsm48_send_rr_app_info(struct msc_a *msc_a, uint8_t apdu_id, |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 1258 | uint8_t apdu_len, const uint8_t *apdu) |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1259 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1260 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 APP INF"); |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1261 | struct gsm48_hdr *gh; |
| 1262 | |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1263 | DEBUGP(DRR, "TX APPLICATION INFO id=0x%02x, len=%u\n", |
| 1264 | apdu_id, apdu_len); |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 1265 | |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1266 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2 + apdu_len); |
| 1267 | gh->proto_discr = GSM48_PDISC_RR; |
| 1268 | gh->msg_type = GSM48_MT_RR_APP_INFO; |
| 1269 | gh->data[0] = apdu_id; |
| 1270 | gh->data[1] = apdu_len; |
| 1271 | memcpy(gh->data+2, apdu, apdu_len); |
| 1272 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1273 | return msc_a_tx_dtap_to_i(msc_a, msg); |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1274 | } |
| 1275 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1276 | extern int gsm0408_rcv_cc(struct msc_a *msc_a, struct msgb *msg); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 1277 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1278 | /*********************************************************************** |
| 1279 | * VLR integration |
| 1280 | ***********************************************************************/ |
| 1281 | |
| 1282 | /* VLR asks us to send an authentication request */ |
Neels Hofmeyr | 8b6e536 | 2018-11-30 02:57:33 +0100 | [diff] [blame] | 1283 | static int msc_vlr_tx_auth_req(void *msc_conn_ref, struct vlr_auth_tuple *at, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1284 | bool send_autn) |
| 1285 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1286 | struct msc_a *msc_a = msc_conn_ref; |
| 1287 | return gsm48_tx_mm_auth_req(msc_a, at->vec.rand, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1288 | send_autn? at->vec.autn : NULL, |
| 1289 | at->key_seq); |
| 1290 | } |
| 1291 | |
| 1292 | /* VLR asks us to send an authentication reject */ |
| 1293 | static int msc_vlr_tx_auth_rej(void *msc_conn_ref) |
| 1294 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1295 | struct msc_a *msc_a = msc_conn_ref; |
| 1296 | return gsm48_tx_mm_auth_rej(msc_a); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1297 | } |
| 1298 | |
| 1299 | /* VLR asks us to transmit an Identity Request of given type */ |
| 1300 | static int msc_vlr_tx_id_req(void *msc_conn_ref, uint8_t mi_type) |
| 1301 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1302 | struct msc_a *msc_a = msc_conn_ref; |
| 1303 | return mm_tx_identity_req(msc_a, mi_type); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | /* VLR asks us to transmit a Location Update Accept */ |
| 1307 | static int msc_vlr_tx_lu_acc(void *msc_conn_ref, uint32_t send_tmsi) |
| 1308 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1309 | struct msc_a *msc_a = msc_conn_ref; |
| 1310 | return gsm0408_loc_upd_acc(msc_a, send_tmsi); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | /* VLR asks us to transmit a Location Update Reject */ |
Neels Hofmeyr | 1580959 | 2018-04-06 02:57:51 +0200 | [diff] [blame] | 1314 | static int msc_vlr_tx_lu_rej(void *msc_conn_ref, enum gsm48_reject_value cause) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1315 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1316 | struct msc_a *msc_a = msc_conn_ref; |
| 1317 | return gsm0408_loc_upd_rej(msc_a, cause); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1318 | } |
| 1319 | |
| 1320 | /* VLR asks us to transmit a CM Service Accept */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1321 | int msc_vlr_tx_cm_serv_acc(void *msc_conn_ref, enum osmo_cm_service_type cm_service_type) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1322 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1323 | struct msc_a *msc_a = msc_conn_ref; |
| 1324 | return msc_gsm48_tx_mm_serv_ack(msc_a); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1325 | } |
| 1326 | |
| 1327 | static int msc_vlr_tx_common_id(void *msc_conn_ref) |
| 1328 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1329 | struct msc_a *msc_a = msc_conn_ref; |
| 1330 | struct ran_msg msg = { |
| 1331 | .msg_type = RAN_MSG_COMMON_ID, |
| 1332 | .common_id = { |
| 1333 | .imsi = msc_a_vsub(msc_a)->imsi, |
| 1334 | }, |
| 1335 | }; |
| 1336 | return msc_a_ran_down(msc_a, MSC_ROLE_I, &msg); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1337 | } |
| 1338 | |
Stefan Sperling | 3a74128 | 2018-03-13 21:11:49 +0100 | [diff] [blame] | 1339 | /* VLR asks us to transmit MM info. */ |
| 1340 | static int msc_vlr_tx_mm_info(void *msc_conn_ref) |
| 1341 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1342 | struct msc_a *msc_a = msc_conn_ref; |
| 1343 | struct gsm_network *net = msc_a_net(msc_a); |
| 1344 | if (!net->send_mm_info) |
Stefan Sperling | 3a74128 | 2018-03-13 21:11:49 +0100 | [diff] [blame] | 1345 | return 0; |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1346 | return gsm48_tx_mm_info(msc_a); |
Stefan Sperling | 3a74128 | 2018-03-13 21:11:49 +0100 | [diff] [blame] | 1347 | } |
| 1348 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1349 | /* VLR asks us to transmit a CM Service Reject */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1350 | static int msc_vlr_tx_cm_serv_rej(void *msc_conn_ref, enum osmo_cm_service_type cm_service_type, |
| 1351 | enum gsm48_reject_value cause) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1352 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1353 | struct msc_a *msc_a = msc_conn_ref; |
| 1354 | msc_gsm48_tx_mm_serv_rej(msc_a, cause); |
| 1355 | msc_a_put(msc_a, msc_a_cm_service_type_to_use(cm_service_type)); |
| 1356 | return 0; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1357 | } |
| 1358 | |
| 1359 | /* VLR informs us that the subscriber data has somehow been modified */ |
| 1360 | static void msc_vlr_subscr_update(struct vlr_subscr *subscr) |
| 1361 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1362 | struct msub *msub = msub_for_vsub(subscr); |
| 1363 | LOGVSUBP(LOGL_NOTICE, subscr, "VLR: update for IMSI=%s (MSISDN=%s)%s\n", |
| 1364 | subscr->imsi, subscr->msisdn, msub ? "" : " (NO CONN!)"); |
| 1365 | msub_update_id(msub); |
Neels Hofmeyr | 68cf957 | 2018-09-18 15:52:58 +0200 | [diff] [blame] | 1366 | } |
| 1367 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1368 | /* VLR informs us that the subscriber has been associated with a conn */ |
Neels Hofmeyr | 1035d90 | 2018-12-28 21:22:32 +0100 | [diff] [blame] | 1369 | static int msc_vlr_subscr_assoc(void *msc_conn_ref, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1370 | struct vlr_subscr *vsub) |
| 1371 | { |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1372 | struct msc_a *msc_a = msc_conn_ref; |
| 1373 | struct msub *msub = msc_a->c.msub; |
Max | 48d4ec0 | 2018-02-12 16:51:03 +0100 | [diff] [blame] | 1374 | OSMO_ASSERT(vsub); |
Neels Hofmeyr | 1035d90 | 2018-12-28 21:22:32 +0100 | [diff] [blame] | 1375 | |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1376 | if (msub_set_vsub(msub, vsub)) |
| 1377 | return -EINVAL; |
| 1378 | vsub->cs.attached_via_ran = msc_a->c.ran->type; |
Neels Hofmeyr | 68cf957 | 2018-09-18 15:52:58 +0200 | [diff] [blame] | 1379 | |
| 1380 | /* In case we have already received Classmark Information before the VLR Subscriber was |
| 1381 | * associated with the conn: merge the new Classmark into vsub->classmark. Don't overwrite valid |
| 1382 | * vsub->classmark with unset classmark, though. */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1383 | osmo_gsm48_classmark_update(&vsub->classmark, &msc_a->temporary_classmark); |
| 1384 | |
| 1385 | msub_update_id(msub); |
| 1386 | |
| 1387 | osmo_fsm_inst_dispatch(msc_a->c.fi, MSC_A_EV_COMPLETE_LAYER_3_OK, NULL); |
Neels Hofmeyr | 1035d90 | 2018-12-28 21:22:32 +0100 | [diff] [blame] | 1388 | return 0; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1389 | } |
| 1390 | |
| 1391 | /* operations that we need to implement for libvlr */ |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1392 | const struct vlr_ops msc_vlr_ops = { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1393 | .tx_auth_req = msc_vlr_tx_auth_req, |
| 1394 | .tx_auth_rej = msc_vlr_tx_auth_rej, |
| 1395 | .tx_id_req = msc_vlr_tx_id_req, |
| 1396 | .tx_lu_acc = msc_vlr_tx_lu_acc, |
| 1397 | .tx_lu_rej = msc_vlr_tx_lu_rej, |
| 1398 | .tx_cm_serv_acc = msc_vlr_tx_cm_serv_acc, |
| 1399 | .tx_cm_serv_rej = msc_vlr_tx_cm_serv_rej, |
Neels Hofmeyr | c4628a3 | 2018-12-07 14:47:34 +0100 | [diff] [blame] | 1400 | .set_ciph_mode = msc_a_vlr_set_cipher_mode, |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1401 | .tx_common_id = msc_vlr_tx_common_id, |
Stefan Sperling | 3a74128 | 2018-03-13 21:11:49 +0100 | [diff] [blame] | 1402 | .tx_mm_info = msc_vlr_tx_mm_info, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1403 | .subscr_update = msc_vlr_subscr_update, |
| 1404 | .subscr_assoc = msc_vlr_subscr_assoc, |
| 1405 | }; |
| 1406 | |
Neels Hofmeyr | 79e580b | 2018-03-22 16:48:22 +0100 | [diff] [blame] | 1407 | struct msgb *gsm48_create_mm_serv_rej(enum gsm48_reject_value value) |
| 1408 | { |
| 1409 | struct msgb *msg; |
| 1410 | struct gsm48_hdr *gh; |
| 1411 | |
| 1412 | msg = gsm48_msgb_alloc_name("GSM 04.08 SERV REJ"); |
| 1413 | if (!msg) |
| 1414 | return NULL; |
| 1415 | |
| 1416 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 1417 | gh->proto_discr = GSM48_PDISC_MM; |
| 1418 | gh->msg_type = GSM48_MT_MM_CM_SERV_REJ; |
| 1419 | gh->data[0] = value; |
| 1420 | |
| 1421 | return msg; |
| 1422 | } |
| 1423 | |
| 1424 | struct msgb *gsm48_create_loc_upd_rej(uint8_t cause) |
| 1425 | { |
| 1426 | struct gsm48_hdr *gh; |
| 1427 | struct msgb *msg; |
| 1428 | |
| 1429 | msg = gsm48_msgb_alloc_name("GSM 04.08 LOC UPD REJ"); |
| 1430 | if (!msg) |
| 1431 | return NULL; |
| 1432 | |
| 1433 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 1434 | gh->proto_discr = GSM48_PDISC_MM; |
| 1435 | gh->msg_type = GSM48_MT_MM_LOC_UPD_REJECT; |
| 1436 | gh->data[0] = cause; |
| 1437 | return msg; |
| 1438 | } |
| 1439 | |
| 1440 | int gsm48_extract_mi(uint8_t *classmark2_lv, int length, char *mi_string, uint8_t *mi_type) |
| 1441 | { |
| 1442 | /* Check the size for the classmark */ |
| 1443 | if (length < 1 + *classmark2_lv) |
| 1444 | return -1; |
| 1445 | |
| 1446 | uint8_t *mi_lv = classmark2_lv + *classmark2_lv + 1; |
| 1447 | if (length < 2 + *classmark2_lv + mi_lv[0]) |
| 1448 | return -2; |
| 1449 | |
| 1450 | *mi_type = mi_lv[1] & GSM_MI_TYPE_MASK; |
| 1451 | return gsm48_mi_to_string(mi_string, GSM48_MI_SIZE, mi_lv+1, *mi_lv); |
| 1452 | } |
| 1453 | |
| 1454 | int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length, |
| 1455 | char *mi_string, uint8_t *mi_type) |
| 1456 | { |
| 1457 | static const uint32_t classmark_offset = |
| 1458 | offsetof(struct gsm48_pag_resp, classmark2); |
| 1459 | uint8_t *classmark2_lv = (uint8_t *) &resp->classmark2; |
| 1460 | return gsm48_extract_mi(classmark2_lv, length - classmark_offset, |
| 1461 | mi_string, mi_type); |
| 1462 | } |