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 | |
Harald Welte | 9c3dc90 | 2012-04-08 16:59:24 +0200 | [diff] [blame] | 35 | #include "bscconfig.h" |
| 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/osmo_msc.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 50 | #include <osmocom/msc/mncc_int.h> |
Pablo Neira Ayuso | ed5cacb | 2011-08-17 22:44:07 +0200 | [diff] [blame] | 51 | #include <osmocom/abis/e1_input.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 52 | #include <osmocom/core/bitvec.h> |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 53 | #include <osmocom/msc/vlr.h> |
| 54 | #include <osmocom/msc/msc_ifaces.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> |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 66 | #ifdef BUILD_IU |
Neels Hofmeyr | 00e82d6 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 67 | #include <osmocom/ranap/iu_client.h> |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 68 | #endif |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 69 | |
Neels Hofmeyr | 9084396 | 2017-09-04 15:04:35 +0200 | [diff] [blame] | 70 | #include <osmocom/msc/msc_ifaces.h> |
| 71 | #include <osmocom/msc/a_iface.h> |
Philipp Maier | 621ba03 | 2017-11-07 17:19:25 +0100 | [diff] [blame] | 72 | #include <osmocom/msc/msc_mgcp.h> |
Philipp Maier | fbf6610 | 2017-04-09 12:32:51 +0200 | [diff] [blame] | 73 | |
Holger Hans Peter Freyther | 1e61b25 | 2013-07-06 11:45:38 +0200 | [diff] [blame] | 74 | #include <assert.h> |
| 75 | |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 76 | |
Harald Welte (local) | d19e58b | 2009-08-15 02:30:58 +0200 | [diff] [blame] | 77 | void *tall_locop_ctx; |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 78 | void *tall_authciphop_ctx; |
Harald Welte | 2cf161b | 2009-06-20 22:36:41 +0200 | [diff] [blame] | 79 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 80 | static int gsm0408_loc_upd_acc(struct gsm_subscriber_connection *conn, |
| 81 | uint32_t send_tmsi); |
Harald Welte | 65e74cc | 2008-12-29 01:55:35 +0000 | [diff] [blame] | 82 | |
Harald Welte | 27989d4 | 2018-06-21 20:39:20 +0200 | [diff] [blame] | 83 | /*! Send a simple GSM 04.08 message without any payload |
| 84 | * \param conn Active subscriber connection |
| 85 | * \param[in] pdisc Protocol discriminator |
| 86 | * \param[in] msg_type Message type |
| 87 | * \return result of \ref gsm48_conn_sendmsg |
| 88 | */ |
| 89 | int gsm48_tx_simple(struct gsm_subscriber_connection *conn, |
| 90 | uint8_t pdisc, uint8_t msg_type) |
| 91 | { |
| 92 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 TX SIMPLE"); |
| 93 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 94 | |
| 95 | gh->proto_discr = pdisc; |
| 96 | gh->msg_type = msg_type; |
| 97 | |
| 98 | return gsm48_conn_sendmsg(msg, conn, NULL); |
| 99 | } |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 100 | |
Neels Hofmeyr | 9d74425 | 2018-03-22 16:09:50 +0100 | [diff] [blame] | 101 | static bool classmark_is_r99(struct gsm_classmark *cm) |
| 102 | { |
| 103 | int rev_lev = 0; |
| 104 | if (cm->classmark1_set) |
| 105 | rev_lev = cm->classmark1.rev_lev; |
| 106 | else if (cm->classmark2_len > 0) |
| 107 | rev_lev = (cm->classmark2[0] >> 5) & 0x3; |
| 108 | return rev_lev >= 2; |
| 109 | } |
| 110 | |
Harald Welte | 7133072 | 2017-12-23 19:59:02 +0100 | [diff] [blame] | 111 | /* Determine if the given CLASSMARK (1/2/3) value permits a given A5/n cipher */ |
| 112 | static bool classmark_supports_a5(const struct gsm_classmark *cm, uint8_t a5) |
| 113 | { |
| 114 | switch (a5) { |
| 115 | case 0: |
| 116 | /* all phones must implement A5/0, see 3GPP TS 43.020 4.9 */ |
| 117 | return true; |
| 118 | case 1: |
| 119 | /* 3GPP TS 43.020 4.9 requires A5/1 to be suppored by all phones and actually states: |
| 120 | * "The network shall not provide service to an MS which indicates that it does not |
| 121 | * support the ciphering algorithm A5/1.". However, let's be more tolerant based |
| 122 | * on policy here */ |
| 123 | /* See 3GPP TS 24.008 10.5.1.7 */ |
| 124 | if (!cm->classmark1_set) { |
| 125 | DEBUGP(DMSC, "CLASSMARK 1 unknown, assuming MS supports A5/1\n"); |
| 126 | return true; |
| 127 | } else { |
| 128 | if (cm->classmark1.a5_1) |
| 129 | return false; /* Inverted logic for this bit! */ |
| 130 | else |
| 131 | return true; |
| 132 | } |
| 133 | break; |
| 134 | case 2: |
| 135 | case 3: |
| 136 | /* See 3GPP TS 24.008 10.5.1.6 */ |
| 137 | if (cm->classmark2_len < 3) { |
| 138 | DEBUGP(DMSC, "CLASSMARK 2 unknown, assuming MS doesn't support A5/%u\n", a5); |
| 139 | return false; |
| 140 | } else { |
| 141 | if (cm->classmark2[2] & (1 << (a5-2))) |
| 142 | return true; |
| 143 | else |
| 144 | return false; |
| 145 | } |
| 146 | break; |
| 147 | case 4: |
| 148 | case 5: |
| 149 | case 6: |
| 150 | case 7: |
| 151 | /* See 3GPP TS 24.008 10.5.1.7 */ |
| 152 | if (cm->classmark3_len < 1) { |
| 153 | DEBUGP(DMSC, "CLASSMARK 3 unknown, assuming MS doesn't support A5/%u\n", a5); |
| 154 | return false; |
| 155 | } else { |
| 156 | if (cm->classmark3[0] & (1 << (a5-4))) |
| 157 | return true; |
| 158 | else |
| 159 | return false; |
| 160 | } |
| 161 | break; |
| 162 | default: |
| 163 | return false; |
| 164 | } |
| 165 | } |
| 166 | |
Harald Welte | 27989d4 | 2018-06-21 20:39:20 +0200 | [diff] [blame] | 167 | int gsm48_conn_sendmsg(struct msgb *msg, struct gsm_subscriber_connection *conn, struct gsm_trans *trans) |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 168 | { |
| 169 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msg->data; |
| 170 | |
| 171 | /* if we get passed a transaction reference, do some common |
| 172 | * work that the caller no longer has to do */ |
| 173 | if (trans) { |
| 174 | gh->proto_discr = trans->protocol | (trans->transaction_id << 4); |
Harald Welte | 0e2fa5d | 2018-04-09 16:35:01 +0200 | [diff] [blame] | 175 | OMSC_LINKID_CB(msg) = trans->dlci; |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 176 | } |
| 177 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 178 | return msc_tx_dtap(conn, msg); |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 179 | } |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 180 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 181 | /* clear all transactions globally; used in case of MNCC socket disconnect */ |
Harald Welte | 371efe5 | 2010-12-22 23:17:50 +0100 | [diff] [blame] | 182 | void gsm0408_clear_all_trans(struct gsm_network *net, int protocol) |
| 183 | { |
| 184 | struct gsm_trans *trans, *temp; |
| 185 | |
| 186 | LOGP(DCC, LOGL_NOTICE, "Clearing all currently active transactions!!!\n"); |
| 187 | |
| 188 | llist_for_each_entry_safe(trans, temp, &net->trans_list, entry) { |
Harald Welte | eb76c7a | 2010-12-23 02:47:53 +0100 | [diff] [blame] | 189 | if (trans->protocol == protocol) { |
| 190 | trans->callref = 0; |
Harald Welte | 371efe5 | 2010-12-22 23:17:50 +0100 | [diff] [blame] | 191 | trans_free(trans); |
Harald Welte | eb76c7a | 2010-12-23 02:47:53 +0100 | [diff] [blame] | 192 | } |
Harald Welte | 371efe5 | 2010-12-22 23:17:50 +0100 | [diff] [blame] | 193 | } |
| 194 | } |
| 195 | |
Holger Freyther | 429e776 | 2008-12-30 13:28:30 +0000 | [diff] [blame] | 196 | /* Chapter 9.2.14 : Send LOCATION UPDATING REJECT */ |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 197 | static int gsm0408_loc_upd_rej(struct gsm_subscriber_connection *conn, uint8_t cause) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 198 | { |
Holger Hans Peter Freyther | 230a4d8 | 2010-06-15 19:40:05 +0800 | [diff] [blame] | 199 | struct msgb *msg; |
| 200 | |
Holger Hans Peter Freyther | 230a4d8 | 2010-06-15 19:40:05 +0800 | [diff] [blame] | 201 | msg = gsm48_create_loc_upd_rej(cause); |
| 202 | if (!msg) { |
| 203 | LOGP(DMM, LOGL_ERROR, "Failed to create msg for LOCATION UPDATING REJECT.\n"); |
| 204 | return -1; |
| 205 | } |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 206 | |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 207 | LOGP(DMM, LOGL_INFO, "Subscriber %s: LOCATION UPDATING REJECT\n", |
| 208 | vlr_subscr_name(conn->vsub)); |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 209 | |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 210 | return gsm48_conn_sendmsg(msg, conn, NULL); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | /* Chapter 9.2.13 : Send LOCATION UPDATE ACCEPT */ |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 214 | static int gsm0408_loc_upd_acc(struct gsm_subscriber_connection *conn, |
| 215 | uint32_t send_tmsi) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 216 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 217 | 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] | 218 | struct gsm48_hdr *gh; |
| 219 | struct gsm48_loc_area_id *lai; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 220 | uint8_t *mid; |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 221 | struct osmo_location_area_id laid = { |
| 222 | .plmn = conn->network->plmn, |
| 223 | .lac = conn->lac, |
| 224 | }; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 225 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 226 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 227 | gh->proto_discr = GSM48_PDISC_MM; |
| 228 | gh->msg_type = GSM48_MT_MM_LOC_UPD_ACCEPT; |
| 229 | |
| 230 | lai = (struct gsm48_loc_area_id *) msgb_put(msg, sizeof(*lai)); |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 231 | gsm48_generate_lai2(lai, &laid); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 232 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 233 | if (send_tmsi == GSM_RESERVED_TMSI) { |
| 234 | /* we did not allocate a TMSI to the MS, so we need to |
| 235 | * include the IMSI in order for the MS to delete any |
| 236 | * old TMSI that might still be allocated */ |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 237 | uint8_t mi[10]; |
| 238 | int len; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 239 | len = gsm48_generate_mid_from_imsi(mi, conn->vsub->imsi); |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 240 | mid = msgb_put(msg, len); |
| 241 | memcpy(mid, mi, len); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 242 | DEBUGP(DMM, "-> %s LOCATION UPDATE ACCEPT\n", |
| 243 | vlr_subscr_name(conn->vsub)); |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 244 | } else { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 245 | /* Include the TMSI, which means that the MS will send a |
| 246 | * TMSI REALLOCATION COMPLETE, and we should wait for |
| 247 | * that until T3250 expiration */ |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 248 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 249 | gsm48_generate_mid_from_tmsi(mid, send_tmsi); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 250 | DEBUGP(DMM, "-> %s LOCATION UPDATE ACCEPT (TMSI = 0x%08x)\n", |
| 251 | vlr_subscr_name(conn->vsub), |
| 252 | send_tmsi); |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 253 | } |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 254 | /* TODO: Follow-on proceed */ |
| 255 | /* TODO: CTS permission */ |
| 256 | /* TODO: Equivalent PLMNs */ |
| 257 | /* TODO: Emergency Number List */ |
| 258 | /* TODO: Per-MS T3312 */ |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 259 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 260 | |
Holger Hans Peter Freyther | dc5db24 | 2010-06-15 14:07:27 +0800 | [diff] [blame] | 261 | return gsm48_conn_sendmsg(msg, conn, NULL); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 262 | } |
| 263 | |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 264 | /* Transmit Chapter 9.2.10 Identity Request */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 265 | static int mm_tx_identity_req(struct gsm_subscriber_connection *conn, uint8_t id_type) |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 266 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 267 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ID REQ"); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 268 | struct gsm48_hdr *gh; |
Harald Welte | fc977a8 | 2008-12-27 10:19:37 +0000 | [diff] [blame] | 269 | |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 270 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 271 | gh->proto_discr = GSM48_PDISC_MM; |
| 272 | gh->msg_type = GSM48_MT_MM_ID_REQ; |
| 273 | gh->data[0] = id_type; |
| 274 | |
Holger Hans Peter Freyther | d521d97 | 2010-06-15 14:11:01 +0800 | [diff] [blame] | 275 | return gsm48_conn_sendmsg(msg, conn, NULL); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 276 | } |
| 277 | |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 278 | /* Parse Chapter 9.2.11 Identity Response */ |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 279 | static int mm_rx_id_resp(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 280 | { |
| 281 | struct gsm48_hdr *gh = msgb_l3(msg); |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 282 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 283 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 284 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 285 | if (!conn->vsub) { |
| 286 | LOGP(DMM, LOGL_ERROR, |
| 287 | "Rx MM Identity Response: invalid: no subscriber\n"); |
| 288 | return -EINVAL; |
| 289 | } |
| 290 | |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 291 | gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
Harald Welte | b9845f9 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 292 | DEBUGP(DMM, "IDENTITY RESPONSE: MI(%s)=%s\n", |
| 293 | gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 294 | |
Pablo Neira Ayuso | bbc5b99 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 295 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, gh->data); |
Harald Welte | 7659de1 | 2009-12-13 12:39:18 +0100 | [diff] [blame] | 296 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 297 | return vlr_subscr_rx_id_resp(conn->vsub, gh->data+1, gh->data[0]); |
Harald Welte | 231ad4f | 2008-12-27 11:15:38 +0000 | [diff] [blame] | 298 | } |
| 299 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 300 | /* FIXME: to libosmogsm */ |
Harald Welte | b9845f9 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 301 | static const struct value_string lupd_names[] = { |
| 302 | { GSM48_LUPD_NORMAL, "NORMAL" }, |
| 303 | { GSM48_LUPD_PERIODIC, "PERIODIC" }, |
| 304 | { GSM48_LUPD_IMSI_ATT, "IMSI ATTACH" }, |
| 305 | { 0, NULL } |
| 306 | }; |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 307 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 308 | /* Chapter 9.2.15: Receive Location Updating Request. |
| 309 | * Keep this function non-static for direct invocation by unit tests. */ |
| 310 | int mm_rx_loc_upd_req(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 311 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 312 | struct gsm_network *net = conn->network; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 313 | struct gsm48_hdr *gh = msgb_l3(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 314 | struct gsm48_loc_upd_req *lu; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 315 | uint8_t mi_type; |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 316 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 317 | enum vlr_lu_type vlr_lu_type = VLR_LU_TYPE_REGULAR; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 318 | uint32_t tmsi; |
| 319 | char *imsi; |
| 320 | struct osmo_location_area_id old_lai, new_lai; |
| 321 | struct osmo_fsm_inst *lu_fsm; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 322 | bool is_utran; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 323 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 324 | lu = (struct gsm48_loc_upd_req *) gh->data; |
| 325 | |
| 326 | mi_type = lu->mi[0] & GSM_MI_TYPE_MASK; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 327 | |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 328 | gsm48_mi_to_string(mi_string, sizeof(mi_string), lu->mi, lu->mi_len); |
Harald Welte | fc977a8 | 2008-12-27 10:19:37 +0000 | [diff] [blame] | 329 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 330 | if (msc_subscr_conn_is_establishing_auth_ciph(conn)) { |
| 331 | LOGP(DMM, LOGL_ERROR, |
| 332 | "Cannot accept another LU, conn already busy establishing authenticity;" |
| 333 | " extraneous LOCATION UPDATING REQUEST: MI(%s)=%s type=%s\n", |
| 334 | gsm48_mi_type_name(mi_type), mi_string, get_value_string(lupd_names, lu->type)); |
| 335 | return -EINVAL; |
| 336 | } |
| 337 | |
| 338 | if (msc_subscr_conn_is_accepted(conn)) { |
| 339 | LOGP(DMM, LOGL_ERROR, |
| 340 | "Cannot accept another LU, conn already established;" |
| 341 | " extraneous LOCATION UPDATING REQUEST: MI(%s)=%s type=%s\n", |
| 342 | gsm48_mi_type_name(mi_type), mi_string, get_value_string(lupd_names, lu->type)); |
| 343 | return -EINVAL; |
| 344 | } |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 345 | |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 346 | msc_subscr_conn_update_id(conn, COMPLETE_LAYER3_LU, mi_string); |
| 347 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 348 | conn->classmark.classmark1 = lu->classmark1; |
| 349 | conn->classmark.classmark1_set = true; |
| 350 | |
| 351 | DEBUGP(DMM, "LOCATION UPDATING REQUEST: MI(%s)=%s type=%s\n", |
| 352 | gsm48_mi_type_name(mi_type), mi_string, |
| 353 | get_value_string(lupd_names, lu->type)); |
Holger Freyther | 73487a2 | 2008-12-31 18:53:57 +0000 | [diff] [blame] | 354 | |
Pablo Neira Ayuso | bbc5b99 | 2011-05-06 12:12:31 +0200 | [diff] [blame] | 355 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, &lu->mi_len); |
Harald Welte | 7659de1 | 2009-12-13 12:39:18 +0100 | [diff] [blame] | 356 | |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 357 | switch (lu->type) { |
| 358 | case GSM48_LUPD_NORMAL: |
Neels Hofmeyr | a9f2bb5 | 2016-05-09 21:09:47 +0200 | [diff] [blame] | 359 | rate_ctr_inc(&conn->network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_NORMAL]); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 360 | vlr_lu_type = VLR_LU_TYPE_REGULAR; |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 361 | break; |
| 362 | case GSM48_LUPD_IMSI_ATT: |
Neels Hofmeyr | a9f2bb5 | 2016-05-09 21:09:47 +0200 | [diff] [blame] | 363 | rate_ctr_inc(&conn->network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_ATTACH]); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 364 | vlr_lu_type = VLR_LU_TYPE_IMSI_ATTACH; |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 365 | break; |
| 366 | case GSM48_LUPD_PERIODIC: |
Neels Hofmeyr | a9f2bb5 | 2016-05-09 21:09:47 +0200 | [diff] [blame] | 367 | rate_ctr_inc(&conn->network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_PERIODIC]); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 368 | vlr_lu_type = VLR_LU_TYPE_PERIODIC; |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 369 | break; |
| 370 | } |
| 371 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 372 | /* TODO: 10.5.1.6 MS Classmark for UMTS / Classmark 2 */ |
| 373 | /* TODO: 10.5.3.14 Aditional update parameters (CS fallback calls) */ |
| 374 | /* TODO: 10.5.7.8 Device properties */ |
| 375 | /* TODO: 10.5.1.15 MS network feature support */ |
Sylvain Munaut | 2030a2a | 2010-06-10 13:36:59 +0200 | [diff] [blame] | 376 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 377 | switch (mi_type) { |
| 378 | case GSM_MI_TYPE_IMSI: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 379 | tmsi = GSM_RESERVED_TMSI; |
| 380 | imsi = mi_string; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 381 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 382 | case GSM_MI_TYPE_TMSI: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 383 | tmsi = tmsi_from_string(mi_string); |
| 384 | imsi = NULL; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 385 | break; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 386 | default: |
Harald Welte | a036854 | 2009-06-27 02:58:43 +0200 | [diff] [blame] | 387 | DEBUGPC(DMM, "unknown mobile identity type\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 388 | tmsi = GSM_RESERVED_TMSI; |
| 389 | imsi = NULL; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 390 | break; |
| 391 | } |
| 392 | |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 393 | gsm48_decode_lai2(&lu->lai, &old_lai); |
| 394 | new_lai.plmn = conn->network->plmn; |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 395 | new_lai.lac = conn->lac; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 396 | DEBUGP(DMM, "LU/new-LAC: %u/%u\n", old_lai.lac, new_lai.lac); |
Harald Welte | 24516ea | 2009-07-04 10:18:00 +0200 | [diff] [blame] | 397 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 398 | is_utran = (conn->via_ran == RAN_UTRAN_IU); |
Neels Hofmeyr | 4d3a66b | 2018-03-31 18:45:59 +0200 | [diff] [blame] | 399 | lu_fsm = vlr_loc_update(conn->fi, |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 400 | SUBSCR_CONN_E_ACCEPTED, SUBSCR_CONN_E_CN_CLOSE, NULL, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 401 | net->vlr, conn, vlr_lu_type, tmsi, imsi, |
| 402 | &old_lai, &new_lai, |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 403 | is_utran || conn->network->authentication_required, |
Harald Welte | 7b222aa | 2017-12-23 19:30:32 +0100 | [diff] [blame] | 404 | is_utran || conn->network->a5_encryption_mask > 0x01, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 405 | classmark_is_r99(&conn->classmark), |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 406 | is_utran, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 407 | net->vlr->cfg.assign_tmsi); |
| 408 | if (!lu_fsm) { |
| 409 | DEBUGP(DRR, "%s: Can't start LU FSM\n", mi_string); |
| 410 | return 0; |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 411 | } |
| 412 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 413 | /* From vlr_loc_update() we expect an implicit dispatch of |
| 414 | * VLR_ULA_E_UPDATE_LA, and thus we expect msc_vlr_subscr_assoc() to |
| 415 | * already have been called and completed. Has an error occured? */ |
Harald Welte | 255539c | 2008-12-28 02:26:27 +0000 | [diff] [blame] | 416 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 417 | if (!conn->vsub || conn->vsub->lu_fsm != lu_fsm) { |
| 418 | LOGP(DRR, LOGL_ERROR, |
| 419 | "%s: internal error during Location Updating attempt\n", |
| 420 | mi_string); |
| 421 | return -EIO; |
| 422 | } |
| 423 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 424 | msc_subscr_conn_complete_layer_3(conn); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 425 | return 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 426 | } |
| 427 | |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 428 | /* Turn int into semi-octet representation: 98 => 0x89 */ |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 429 | /* FIXME: libosmocore/libosmogsm */ |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 430 | static uint8_t bcdify(uint8_t value) |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 431 | { |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 432 | uint8_t ret; |
| 433 | |
| 434 | ret = value / 10; |
| 435 | ret |= (value % 10) << 4; |
| 436 | |
| 437 | return ret; |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 438 | } |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 439 | |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 440 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 441 | /* Section 9.2.15a */ |
Holger Hans Peter Freyther | 9140174 | 2010-06-15 14:16:02 +0800 | [diff] [blame] | 442 | int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn) |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 443 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 444 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 MM INF"); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 445 | struct gsm48_hdr *gh; |
Neels Hofmeyr | a9f2bb5 | 2016-05-09 21:09:47 +0200 | [diff] [blame] | 446 | struct gsm_network *net = conn->network; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 447 | uint8_t *ptr8; |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 448 | int name_len, name_pad; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 449 | |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 450 | time_t cur_t; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 451 | struct tm* gmt_time; |
| 452 | struct tm* local_time; |
| 453 | int tzunits; |
Jacob Erlbeck | f46e226 | 2014-01-07 15:05:16 +0100 | [diff] [blame] | 454 | int dst = 0; |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 455 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 456 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 457 | gh->proto_discr = GSM48_PDISC_MM; |
| 458 | gh->msg_type = GSM48_MT_MM_INFO; |
| 459 | |
| 460 | if (net->name_long) { |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 461 | #if 0 |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 462 | name_len = strlen(net->name_long); |
| 463 | /* 10.5.3.5a */ |
| 464 | ptr8 = msgb_put(msg, 3); |
| 465 | ptr8[0] = GSM48_IE_NAME_LONG; |
| 466 | ptr8[1] = name_len*2 +1; |
| 467 | ptr8[2] = 0x90; /* UCS2, no spare bits, no CI */ |
| 468 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 469 | ptr16 = (uint16_t *) msgb_put(msg, name_len*2); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 470 | for (i = 0; i < name_len; i++) |
Harald Welte | 179f064 | 2008-12-31 23:59:18 +0000 | [diff] [blame] | 471 | ptr16[i] = htons(net->name_long[i]); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 472 | |
| 473 | /* FIXME: Use Cell Broadcast, not UCS-2, since |
| 474 | * UCS-2 is only supported by later revisions of the spec */ |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 475 | #endif |
| 476 | name_len = (strlen(net->name_long)*7)/8; |
| 477 | name_pad = (8 - strlen(net->name_long)*7)%8; |
| 478 | if (name_pad > 0) |
| 479 | name_len++; |
| 480 | /* 10.5.3.5a */ |
| 481 | ptr8 = msgb_put(msg, 3); |
| 482 | ptr8[0] = GSM48_IE_NAME_LONG; |
| 483 | ptr8[1] = name_len +1; |
| 484 | ptr8[2] = 0x80 | name_pad; /* Cell Broadcast DCS, no CI */ |
| 485 | |
| 486 | ptr8 = msgb_put(msg, name_len); |
Harald Welte | 5468f76 | 2015-01-01 12:41:17 +0100 | [diff] [blame] | 487 | gsm_7bit_encode_n(ptr8, name_len, net->name_long, NULL); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 488 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | if (net->name_short) { |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 492 | #if 0 |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 493 | name_len = strlen(net->name_short); |
| 494 | /* 10.5.3.5a */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 495 | ptr8 = (uint8_t *) msgb_put(msg, 3); |
Harald Welte | 7543eb7 | 2009-07-19 17:51:36 +0200 | [diff] [blame] | 496 | ptr8[0] = GSM48_IE_NAME_SHORT; |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 497 | ptr8[1] = name_len*2 + 1; |
| 498 | ptr8[2] = 0x90; /* UCS2, no spare bits, no CI */ |
| 499 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 500 | ptr16 = (uint16_t *) msgb_put(msg, name_len*2); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 501 | for (i = 0; i < name_len; i++) |
Harald Welte | 179f064 | 2008-12-31 23:59:18 +0000 | [diff] [blame] | 502 | ptr16[i] = htons(net->name_short[i]); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 503 | #endif |
| 504 | name_len = (strlen(net->name_short)*7)/8; |
| 505 | name_pad = (8 - strlen(net->name_short)*7)%8; |
| 506 | if (name_pad > 0) |
| 507 | name_len++; |
| 508 | /* 10.5.3.5a */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 509 | ptr8 = (uint8_t *) msgb_put(msg, 3); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 510 | ptr8[0] = GSM48_IE_NAME_SHORT; |
| 511 | ptr8[1] = name_len +1; |
| 512 | ptr8[2] = 0x80 | name_pad; /* Cell Broadcast DCS, no CI */ |
| 513 | |
| 514 | ptr8 = msgb_put(msg, name_len); |
Harald Welte | 5468f76 | 2015-01-01 12:41:17 +0100 | [diff] [blame] | 515 | gsm_7bit_encode_n(ptr8, name_len, net->name_short, NULL); |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 516 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 517 | } |
| 518 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 519 | /* Section 10.5.3.9 */ |
| 520 | cur_t = time(NULL); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 521 | gmt_time = gmtime(&cur_t); |
| 522 | |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 523 | ptr8 = msgb_put(msg, 8); |
| 524 | ptr8[0] = GSM48_IE_NET_TIME_TZ; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 525 | ptr8[1] = bcdify(gmt_time->tm_year % 100); |
| 526 | ptr8[2] = bcdify(gmt_time->tm_mon + 1); |
| 527 | ptr8[3] = bcdify(gmt_time->tm_mday); |
| 528 | ptr8[4] = bcdify(gmt_time->tm_hour); |
| 529 | ptr8[5] = bcdify(gmt_time->tm_min); |
| 530 | ptr8[6] = bcdify(gmt_time->tm_sec); |
| 531 | |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 532 | if (net->tz.override) { |
Harald Welte | 45f9171 | 2012-07-08 16:48:11 +0200 | [diff] [blame] | 533 | /* Convert tz.hr and tz.mn to units */ |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 534 | if (net->tz.hr < 0) { |
| 535 | tzunits = ((net->tz.hr/-1)*4); |
| 536 | tzunits = tzunits + (net->tz.mn/15); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 537 | ptr8[7] = bcdify(tzunits); |
| 538 | /* Set negative time */ |
| 539 | ptr8[7] |= 0x08; |
| 540 | } |
| 541 | else { |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 542 | tzunits = net->tz.hr*4; |
| 543 | tzunits = tzunits + (net->tz.mn/15); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 544 | ptr8[7] = bcdify(tzunits); |
| 545 | } |
Jacob Erlbeck | f46e226 | 2014-01-07 15:05:16 +0100 | [diff] [blame] | 546 | /* Convert DST value */ |
Neels Hofmeyr | 7398395 | 2016-05-10 13:29:33 +0200 | [diff] [blame] | 547 | if (net->tz.dst >= 0 && net->tz.dst <= 2) |
| 548 | dst = net->tz.dst; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 549 | } |
| 550 | else { |
| 551 | /* Need to get GSM offset and convert into 15 min units */ |
| 552 | /* 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] | 553 | #ifdef HAVE_TM_GMTOFF_IN_TM |
Benoit Bolsee | 38bb344 | 2017-07-05 12:57:16 +0200 | [diff] [blame] | 554 | local_time = localtime(&cur_t); |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 555 | tzunits = (local_time->tm_gmtoff/60)/15; |
Harald Welte | 9c3dc90 | 2012-04-08 16:59:24 +0200 | [diff] [blame] | 556 | #else |
Benoit Bolsee | 38bb344 | 2017-07-05 12:57:16 +0200 | [diff] [blame] | 557 | /* find timezone offset */ |
| 558 | time_t utc; |
| 559 | double offsetFromUTC; |
| 560 | utc = mktime(gmt_time); |
| 561 | local_time = localtime(&cur_t); |
| 562 | offsetFromUTC = difftime(cur_t, utc); |
| 563 | if (local_time->tm_isdst) |
| 564 | offsetFromUTC += 3600.0; |
| 565 | tzunits = ((int)offsetFromUTC) / 60 / 15; |
Harald Welte | 9c3dc90 | 2012-04-08 16:59:24 +0200 | [diff] [blame] | 566 | #endif |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 567 | if (tzunits < 0) { |
| 568 | tzunits = tzunits/-1; |
| 569 | ptr8[7] = bcdify(tzunits); |
| 570 | /* Flip it to negative */ |
| 571 | ptr8[7] |= 0x08; |
| 572 | } |
| 573 | else |
| 574 | ptr8[7] = bcdify(tzunits); |
Jacob Erlbeck | f46e226 | 2014-01-07 15:05:16 +0100 | [diff] [blame] | 575 | |
| 576 | /* Does not support DST +2 */ |
| 577 | if (local_time->tm_isdst) |
| 578 | dst = 1; |
| 579 | } |
| 580 | |
| 581 | if (dst) { |
| 582 | ptr8 = msgb_put(msg, 3); |
| 583 | ptr8[0] = GSM48_IE_NET_DST; |
| 584 | ptr8[1] = 1; |
| 585 | ptr8[2] = dst; |
Gus Bourg | 1c5dd2c | 2011-12-02 10:18:17 +0100 | [diff] [blame] | 586 | } |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 587 | |
Daniel Willmann | eea9337 | 2009-08-13 03:42:07 +0200 | [diff] [blame] | 588 | DEBUGP(DMM, "-> MM INFO\n"); |
| 589 | |
Holger Hans Peter Freyther | 9140174 | 2010-06-15 14:16:02 +0800 | [diff] [blame] | 590 | return gsm48_conn_sendmsg(msg, conn, NULL); |
Harald Welte | db253af | 2008-12-30 17:56:55 +0000 | [diff] [blame] | 591 | } |
| 592 | |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 593 | /*! Send an Authentication Request to MS on the given subscriber connection |
| 594 | * according to 3GPP/ETSI TS 24.008, Section 9.2.2. |
| 595 | * \param[in] conn Subscriber connection to send on. |
| 596 | * \param[in] rand Random challenge token to send, must be 16 bytes long. |
| 597 | * \param[in] autn r99: In case of UMTS mutual authentication, AUTN token to |
| 598 | * send; must be 16 bytes long, or pass NULL for plain GSM auth. |
| 599 | * \param[in] key_seq auth tuple's sequence number. |
| 600 | */ |
| 601 | int gsm48_tx_mm_auth_req(struct gsm_subscriber_connection *conn, uint8_t *rand, |
| 602 | uint8_t *autn, int key_seq) |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 603 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 604 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH REQ"); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 605 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
Sylvain Munaut | 849f554 | 2009-09-27 11:10:17 +0200 | [diff] [blame] | 606 | 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] | 607 | |
Neels Hofmeyr | 3355fd6 | 2017-02-14 17:42:25 +0100 | [diff] [blame] | 608 | DEBUGP(DMM, "-> AUTH REQ (rand = %s)\n", osmo_hexdump_nospc(rand, 16)); |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 609 | if (autn) |
Neels Hofmeyr | 3355fd6 | 2017-02-14 17:42:25 +0100 | [diff] [blame] | 610 | DEBUGP(DMM, " AUTH REQ (autn = %s)\n", osmo_hexdump_nospc(autn, 16)); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 611 | |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 612 | gh->proto_discr = GSM48_PDISC_MM; |
| 613 | gh->msg_type = GSM48_MT_MM_AUTH_REQ; |
| 614 | |
Sylvain Munaut | bd55a6d | 2009-12-24 00:23:46 +0100 | [diff] [blame] | 615 | ar->key_seq = key_seq; |
Sylvain Munaut | 849f554 | 2009-09-27 11:10:17 +0200 | [diff] [blame] | 616 | |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 617 | /* 16 bytes RAND parameters */ |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 618 | osmo_static_assert(sizeof(ar->rand) == 16, sizeof_auth_req_r99_rand); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 619 | if (rand) |
Sylvain Munaut | 849f554 | 2009-09-27 11:10:17 +0200 | [diff] [blame] | 620 | memcpy(ar->rand, rand, 16); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 621 | |
Neels Hofmeyr | d675515 | 2017-01-27 00:25:47 +0100 | [diff] [blame] | 622 | |
| 623 | /* 16 bytes AUTN */ |
| 624 | if (autn) |
| 625 | msgb_tlv_put(msg, GSM48_IE_AUTN, 16, autn); |
| 626 | |
Holger Hans Peter Freyther | e9ed340 | 2010-06-16 12:30:50 +0800 | [diff] [blame] | 627 | return gsm48_conn_sendmsg(msg, conn, NULL); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | /* Section 9.2.1 */ |
Holger Hans Peter Freyther | e9ed340 | 2010-06-16 12:30:50 +0800 | [diff] [blame] | 631 | int gsm48_tx_mm_auth_rej(struct gsm_subscriber_connection *conn) |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 632 | { |
| 633 | DEBUGP(DMM, "-> AUTH REJECT\n"); |
Holger Hans Peter Freyther | e9ed340 | 2010-06-16 12:30:50 +0800 | [diff] [blame] | 634 | return gsm48_tx_simple(conn, GSM48_PDISC_MM, GSM48_MT_MM_AUTH_REJ); |
Harald Welte | 7984d5c | 2009-08-12 22:56:50 +0200 | [diff] [blame] | 635 | } |
| 636 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 637 | static int msc_vlr_tx_cm_serv_acc(void *msc_conn_ref); |
Neels Hofmeyr | 1580959 | 2018-04-06 02:57:51 +0200 | [diff] [blame] | 638 | static int msc_vlr_tx_cm_serv_rej(void *msc_conn_ref, enum gsm48_reject_value result); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 639 | |
| 640 | static int cm_serv_reuse_conn(struct gsm_subscriber_connection *conn, const uint8_t *mi_lv) |
Holger Hans Peter Freyther | 2147bc4 | 2013-12-27 17:19:19 +0100 | [diff] [blame] | 641 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 642 | uint8_t mi_type; |
| 643 | char mi_string[GSM48_MI_SIZE]; |
| 644 | uint32_t tmsi; |
Holger Hans Peter Freyther | 2147bc4 | 2013-12-27 17:19:19 +0100 | [diff] [blame] | 645 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 646 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi_lv+1, mi_lv[0]); |
| 647 | mi_type = mi_lv[1] & GSM_MI_TYPE_MASK; |
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 | switch (mi_type) { |
| 650 | case GSM_MI_TYPE_IMSI: |
| 651 | if (vlr_subscr_matches_imsi(conn->vsub, mi_string)) |
| 652 | goto accept_reuse; |
| 653 | break; |
| 654 | case GSM_MI_TYPE_TMSI: |
| 655 | tmsi = osmo_load32be(mi_lv+2); |
| 656 | if (vlr_subscr_matches_tmsi(conn->vsub, tmsi)) |
| 657 | goto accept_reuse; |
| 658 | break; |
| 659 | case GSM_MI_TYPE_IMEI: |
| 660 | if (vlr_subscr_matches_imei(conn->vsub, mi_string)) |
| 661 | goto accept_reuse; |
| 662 | break; |
| 663 | default: |
| 664 | break; |
| 665 | } |
Holger Hans Peter Freyther | 2147bc4 | 2013-12-27 17:19:19 +0100 | [diff] [blame] | 666 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 667 | LOGP(DMM, LOGL_ERROR, "%s: CM Service Request with mismatching mobile identity: %s %s\n", |
| 668 | vlr_subscr_name(conn->vsub), gsm48_mi_type_name(mi_type), mi_string); |
Neels Hofmeyr | 1580959 | 2018-04-06 02:57:51 +0200 | [diff] [blame] | 669 | msc_vlr_tx_cm_serv_rej(conn, GSM48_REJECT_ILLEGAL_MS); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 670 | return -EINVAL; |
Sylvain Munaut | ba87f45 | 2009-12-24 00:28:46 +0100 | [diff] [blame] | 671 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 672 | accept_reuse: |
| 673 | DEBUGP(DMM, "%s: re-using already accepted connection\n", |
| 674 | vlr_subscr_name(conn->vsub)); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 675 | |
| 676 | if (!conn->received_cm_service_request) { |
| 677 | conn->received_cm_service_request = true; |
| 678 | msc_subscr_conn_get(conn, MSC_CONN_USE_CM_SERVICE); |
| 679 | } |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 680 | msc_subscr_conn_update_id(conn, conn->complete_layer3_type, mi_string); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 681 | return conn->network->vlr->ops.tx_cm_serv_acc(conn); |
Sylvain Munaut | ba87f45 | 2009-12-24 00:28:46 +0100 | [diff] [blame] | 682 | } |
| 683 | |
Harald Welte | 4ed0e92 | 2009-01-10 03:17:30 +0000 | [diff] [blame] | 684 | /* |
| 685 | * Handle CM Service Requests |
| 686 | * a) Verify that the packet is long enough to contain the information |
| 687 | * we require otherwsie reject with INCORRECT_MESSAGE |
| 688 | * b) Try to parse the TMSI. If we do not have one reject |
| 689 | * c) Check that we know the subscriber with the TMSI otherwise reject |
| 690 | * with a HLR cause |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 691 | * d) Set the subscriber on the conn and accept |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 692 | * |
| 693 | * Keep this function non-static for direct invocation by unit tests. |
Harald Welte | 4ed0e92 | 2009-01-10 03:17:30 +0000 | [diff] [blame] | 694 | */ |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 695 | int gsm48_rx_mm_serv_req(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 696 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 697 | struct gsm_network *net = conn->network; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 698 | uint8_t mi_type; |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 699 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 700 | |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 701 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 702 | struct gsm48_service_request *req = |
| 703 | (struct gsm48_service_request *)gh->data; |
Holger Hans Peter Freyther | 5d65806 | 2010-05-14 08:02:08 +0800 | [diff] [blame] | 704 | /* unfortunately in Phase1 the classmark2 length is variable */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 705 | uint8_t classmark2_len = gh->data[1]; |
| 706 | uint8_t *classmark2 = gh->data+2; |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 707 | uint8_t *mi_p = classmark2 + classmark2_len; |
| 708 | uint8_t mi_len = *mi_p; |
| 709 | uint8_t *mi = mi_p + 1; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 710 | struct osmo_location_area_id lai; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 711 | bool is_utran; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 712 | |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 713 | lai.plmn = conn->network->plmn; |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 714 | lai.lac = conn->lac; |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 715 | |
| 716 | if (msg->data_len < sizeof(struct gsm48_service_request*)) { |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 717 | LOGP(DMM, LOGL_ERROR, "<- CM SERVICE REQUEST wrong sized message\n"); |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 718 | return msc_gsm48_tx_mm_serv_rej(conn, |
| 719 | GSM48_REJECT_INCORRECT_MESSAGE); |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | if (msg->data_len < req->mi_len + 6) { |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 723 | LOGP(DMM, LOGL_ERROR, "<- CM SERVICE REQUEST does not fit in packet\n"); |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 724 | return msc_gsm48_tx_mm_serv_rej(conn, |
| 725 | GSM48_REJECT_INCORRECT_MESSAGE); |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 726 | } |
| 727 | |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 728 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
Harald Welte | c9e0218 | 2009-05-01 19:07:53 +0000 | [diff] [blame] | 729 | mi_type = mi[0] & GSM_MI_TYPE_MASK; |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 730 | DEBUGP(DMM, "<- CM SERVICE REQUEST serv_type=0x%02x MI(%s)=%s\n", |
| 731 | req->cm_service_type, gsm48_mi_type_name(mi_type), mi_string); |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 732 | |
Harald Welte | 3995d2e | 2018-01-24 11:23:54 +0100 | [diff] [blame] | 733 | switch (mi_type) { |
| 734 | case GSM_MI_TYPE_IMSI: |
| 735 | case GSM_MI_TYPE_TMSI: |
| 736 | /* continue below */ |
| 737 | break; |
| 738 | case GSM_MI_TYPE_IMEI: |
| 739 | if (req->cm_service_type == GSM48_CMSERV_EMERGENCY) { |
| 740 | /* We don't do emergency calls by IMEI */ |
| 741 | LOGP(DMM, LOGL_NOTICE, "<- CM SERVICE REQUEST(IMEI=%s) rejected\n", mi_string); |
| 742 | return msc_gsm48_tx_mm_serv_rej(conn, GSM48_REJECT_IMEI_NOT_ACCEPTED); |
| 743 | } |
| 744 | /* fall-through for non-emergency setup */ |
| 745 | default: |
Holger Hans Peter Freyther | 666e36a | 2015-07-13 20:33:08 +0200 | [diff] [blame] | 746 | DEBUGPC(DMM, "mi_type is not expected: %d\n", mi_type); |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 747 | return msc_gsm48_tx_mm_serv_rej(conn, |
| 748 | GSM48_REJECT_INCORRECT_MESSAGE); |
Harald Welte | ba4cf16 | 2009-01-10 01:49:35 +0000 | [diff] [blame] | 749 | } |
| 750 | |
Harald Welte | 37382ec | 2018-01-24 12:49:34 +0100 | [diff] [blame] | 751 | switch (req->cm_service_type) { |
| 752 | case GSM48_CMSERV_MO_CALL_PACKET: |
| 753 | case GSM48_CMSERV_EMERGENCY: |
| 754 | case GSM48_CMSERV_SMS: |
| 755 | case GSM48_CMSERV_SUP_SERV: |
| 756 | /* continue below */ |
| 757 | break; |
| 758 | default: |
| 759 | return msc_gsm48_tx_mm_serv_rej(conn, GSM48_REJECT_SRV_OPT_NOT_SUPPORTED); |
| 760 | } |
| 761 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 762 | if (msc_subscr_conn_is_accepted(conn)) |
| 763 | return cm_serv_reuse_conn(conn, mi_p); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 764 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 765 | if (msc_subscr_conn_is_establishing_auth_ciph(conn)) { |
| 766 | LOGP(DMM, LOGL_ERROR, |
| 767 | "Cannot accept CM Service Request, conn already busy establishing authenticity\n"); |
Neels Hofmeyr | 1580959 | 2018-04-06 02:57:51 +0200 | [diff] [blame] | 768 | msc_vlr_tx_cm_serv_rej(conn, GSM48_REJECT_CONGESTION); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 769 | return -EINVAL; |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 770 | /* or should we accept and note down the service request anyway? */ |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 771 | } |
| 772 | |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 773 | msc_subscr_conn_update_id(conn, COMPLETE_LAYER3_CM_SERVICE_REQ, mi_string); |
Harald Welte | 7659de1 | 2009-12-13 12:39:18 +0100 | [diff] [blame] | 774 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 775 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, mi_p); |
| 776 | memcpy(conn->classmark.classmark2, classmark2, classmark2_len); |
| 777 | conn->classmark.classmark2_len = classmark2_len; |
| 778 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 779 | is_utran = (conn->via_ran == RAN_UTRAN_IU); |
Neels Hofmeyr | 4d3a66b | 2018-03-31 18:45:59 +0200 | [diff] [blame] | 780 | vlr_proc_acc_req(conn->fi, |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 781 | SUBSCR_CONN_E_ACCEPTED, SUBSCR_CONN_E_CN_CLOSE, NULL, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 782 | net->vlr, conn, |
| 783 | VLR_PR_ARQ_T_CM_SERV_REQ, mi-1, &lai, |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 784 | is_utran || conn->network->authentication_required, |
Harald Welte | 7b222aa | 2017-12-23 19:30:32 +0100 | [diff] [blame] | 785 | is_utran || conn->network->a5_encryption_mask > 0x01, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 786 | classmark_is_r99(&conn->classmark), |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 787 | is_utran); |
Holger Freyther | eb44398 | 2009-06-04 13:58:42 +0000 | [diff] [blame] | 788 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 789 | msc_subscr_conn_complete_layer_3(conn); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 790 | return 0; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 791 | } |
| 792 | |
Harald Welte | 49f8fcb | 2018-01-24 21:40:19 +0100 | [diff] [blame] | 793 | /* Receive a CM Re-establish Request */ |
| 794 | static int gsm48_rx_cm_reest_req(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| 795 | { |
| 796 | uint8_t mi_type; |
| 797 | char mi_string[GSM48_MI_SIZE]; |
| 798 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 799 | |
| 800 | uint8_t classmark2_len = gh->data[1]; |
| 801 | uint8_t *classmark2 = gh->data+2; |
| 802 | uint8_t mi_len = *(classmark2 + classmark2_len); |
| 803 | uint8_t *mi = (classmark2 + classmark2_len + 1); |
| 804 | |
| 805 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 806 | mi_type = mi[0] & GSM_MI_TYPE_MASK; |
| 807 | DEBUGP(DMM, "<- CM RE-ESTABLISH REQUEST MI(%s)=%s\n", gsm48_mi_type_name(mi_type), mi_string); |
| 808 | |
| 809 | /* we don't support CM call re-establishment */ |
| 810 | return msc_gsm48_tx_mm_serv_rej(conn, GSM48_REJECT_SRV_OPT_NOT_SUPPORTED); |
| 811 | } |
| 812 | |
Holger Hans Peter Freyther | 153b13b | 2012-07-10 08:53:27 +0200 | [diff] [blame] | 813 | static int gsm48_rx_mm_imsi_detach_ind(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 814 | { |
Neels Hofmeyr | a9f2bb5 | 2016-05-09 21:09:47 +0200 | [diff] [blame] | 815 | struct gsm_network *network = conn->network; |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 816 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 817 | struct gsm48_imsi_detach_ind *idi = |
| 818 | (struct gsm48_imsi_detach_ind *) gh->data; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 819 | 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] | 820 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 821 | struct vlr_subscr *vsub = NULL; |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 822 | |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 823 | 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] | 824 | DEBUGP(DMM, "IMSI DETACH INDICATION: MI(%s)=%s\n", |
| 825 | gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 826 | |
Neels Hofmeyr | a9f2bb5 | 2016-05-09 21:09:47 +0200 | [diff] [blame] | 827 | rate_ctr_inc(&network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_DETACH]); |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 828 | |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 829 | switch (mi_type) { |
| 830 | case GSM_MI_TYPE_TMSI: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 831 | vsub = vlr_subscr_find_by_tmsi(network->vlr, |
| 832 | tmsi_from_string(mi_string)); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 833 | break; |
| 834 | case GSM_MI_TYPE_IMSI: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 835 | vsub = vlr_subscr_find_by_imsi(network->vlr, mi_string); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 836 | break; |
| 837 | case GSM_MI_TYPE_IMEI: |
| 838 | case GSM_MI_TYPE_IMEISV: |
| 839 | /* no sim card... FIXME: what to do ? */ |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 840 | LOGP(DMM, LOGL_ERROR, "MI(%s)=%s: unimplemented mobile identity type\n", |
| 841 | gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 842 | break; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 843 | default: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 844 | LOGP(DMM, LOGL_ERROR, "MI(%s)=%s: unknown mobile identity type\n", |
| 845 | gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 846 | break; |
| 847 | } |
| 848 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 849 | /* TODO? We used to remember the subscriber's classmark1 here and |
| 850 | * stored it in the old sqlite db, but now we store it in a conn that |
| 851 | * will be discarded anyway: */ |
| 852 | conn->classmark.classmark1 = idi->classmark1; |
Harald Welte (local) | ee4410a | 2009-08-17 09:39:55 +0200 | [diff] [blame] | 853 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 854 | if (!vsub) { |
| 855 | LOGP(DMM, LOGL_ERROR, "IMSI DETACH for unknown subscriber MI(%s)=%s\n", |
| 856 | gsm48_mi_type_name(mi_type), mi_string); |
| 857 | } else { |
| 858 | LOGP(DMM, LOGL_INFO, "IMSI DETACH for %s\n", vlr_subscr_name(vsub)); |
Neels Hofmeyr | facd57a | 2017-12-15 03:48:48 +0100 | [diff] [blame] | 859 | |
| 860 | if (vsub->cs.is_paging) |
| 861 | subscr_paging_cancel(vsub, GSM_PAGING_EXPIRED); |
| 862 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 863 | vlr_subscr_rx_imsi_detach(vsub); |
| 864 | osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_DETACHED, vsub); |
| 865 | vlr_subscr_put(vsub); |
| 866 | } |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 867 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 868 | msc_subscr_conn_close(conn, 0); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 869 | return 0; |
| 870 | } |
| 871 | |
Harald Welte | d2a7f5a | 2009-06-05 20:08:20 +0000 | [diff] [blame] | 872 | static int gsm48_rx_mm_status(struct msgb *msg) |
| 873 | { |
| 874 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 875 | |
| 876 | DEBUGP(DMM, "MM STATUS (reject cause 0x%02x)\n", gh->data[0]); |
| 877 | |
| 878 | return 0; |
| 879 | } |
| 880 | |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 881 | static int parse_gsm_auth_resp(uint8_t *res, uint8_t *res_len, |
| 882 | struct gsm_subscriber_connection *conn, |
| 883 | struct msgb *msg) |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 884 | { |
| 885 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 886 | struct gsm48_auth_resp *ar = (struct gsm48_auth_resp*) gh->data; |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 887 | |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 888 | if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*ar)) { |
| 889 | LOGP(DMM, LOGL_ERROR, |
| 890 | "%s: MM AUTHENTICATION RESPONSE:" |
| 891 | " l3 length invalid: %u\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 892 | vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 893 | return -EINVAL; |
| 894 | } |
| 895 | |
| 896 | *res_len = sizeof(ar->sres); |
| 897 | memcpy(res, ar->sres, sizeof(ar->sres)); |
| 898 | return 0; |
| 899 | } |
| 900 | |
| 901 | static int parse_umts_auth_resp(uint8_t *res, uint8_t *res_len, |
| 902 | struct gsm_subscriber_connection *conn, |
| 903 | struct msgb *msg) |
| 904 | { |
| 905 | struct gsm48_hdr *gh; |
| 906 | uint8_t *data; |
| 907 | uint8_t iei; |
| 908 | uint8_t ie_len; |
| 909 | unsigned int data_len; |
| 910 | |
| 911 | /* First parse the GSM part */ |
| 912 | if (parse_gsm_auth_resp(res, res_len, conn, msg)) |
| 913 | return -EINVAL; |
| 914 | OSMO_ASSERT(*res_len == 4); |
| 915 | |
| 916 | /* Then add the extended res part */ |
| 917 | gh = msgb_l3(msg); |
| 918 | data = gh->data + sizeof(struct gsm48_auth_resp); |
| 919 | data_len = msgb_l3len(msg) - (data - (uint8_t*)msgb_l3(msg)); |
| 920 | |
| 921 | if (data_len < 3) { |
| 922 | LOGP(DMM, LOGL_ERROR, |
| 923 | "%s: MM AUTHENTICATION RESPONSE:" |
| 924 | " l3 length invalid: %u\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 925 | vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 926 | return -EINVAL; |
| 927 | } |
| 928 | |
| 929 | iei = data[0]; |
| 930 | ie_len = data[1]; |
| 931 | if (iei != GSM48_IE_AUTH_RES_EXT) { |
| 932 | LOGP(DMM, LOGL_ERROR, |
| 933 | "%s: MM R99 AUTHENTICATION RESPONSE:" |
| 934 | " expected IEI 0x%02x, got 0x%02x\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 935 | vlr_subscr_name(conn->vsub), |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 936 | GSM48_IE_AUTH_RES_EXT, iei); |
| 937 | return -EINVAL; |
| 938 | } |
| 939 | |
| 940 | if (ie_len > 12) { |
| 941 | LOGP(DMM, LOGL_ERROR, |
| 942 | "%s: MM R99 AUTHENTICATION RESPONSE:" |
| 943 | " extended Auth Resp IE 0x%02x is too large: %u bytes\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 944 | vlr_subscr_name(conn->vsub), GSM48_IE_AUTH_RES_EXT, ie_len); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 945 | return -EINVAL; |
| 946 | } |
| 947 | |
| 948 | *res_len += ie_len; |
| 949 | memcpy(res + 4, &data[2], ie_len); |
| 950 | return 0; |
| 951 | } |
| 952 | |
| 953 | /* Chapter 9.2.3: Authentication Response */ |
| 954 | static int gsm48_rx_mm_auth_resp(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| 955 | { |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 956 | uint8_t res[16]; |
| 957 | uint8_t res_len; |
| 958 | int rc; |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 959 | bool is_umts; |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 960 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 961 | if (!conn->vsub) { |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 962 | LOGP(DMM, LOGL_ERROR, |
| 963 | "MM AUTHENTICATION RESPONSE: invalid: no subscriber\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 964 | msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 965 | return -EINVAL; |
| 966 | } |
| 967 | |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 968 | is_umts = (msgb_l3len(msg) > sizeof(struct gsm48_hdr) + sizeof(struct gsm48_auth_resp)); |
| 969 | |
| 970 | if (is_umts) |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 971 | rc = parse_umts_auth_resp(res, &res_len, conn, msg); |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 972 | else |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 973 | rc = parse_gsm_auth_resp(res, &res_len, conn, msg); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 974 | |
| 975 | if (rc) { |
Neels Hofmeyr | 8e0af0b | 2018-03-10 03:32:18 +0100 | [diff] [blame] | 976 | LOGP(DMM, LOGL_ERROR, |
| 977 | "%s: MM AUTHENTICATION RESPONSE: invalid: parsing %s AKA Auth Response" |
| 978 | " failed with rc=%d; dispatching zero length SRES/RES to trigger failure\n", |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 979 | vlr_subscr_name(conn->vsub), is_umts ? "UMTS" : "GSM", rc); |
Neels Hofmeyr | 8e0af0b | 2018-03-10 03:32:18 +0100 | [diff] [blame] | 980 | memset(res, 0, sizeof(res)); |
| 981 | res_len = 0; |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | DEBUGP(DMM, "%s: MM %s AUTHENTICATION RESPONSE (%s = %s)\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 985 | vlr_subscr_name(conn->vsub), |
Neels Hofmeyr | d97821f | 2018-03-10 04:51:39 +0100 | [diff] [blame] | 986 | is_umts ? "UMTS" : "GSM", is_umts ? "res" : "sres", |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 987 | osmo_hexdump_nospc(res, res_len)); |
| 988 | |
Neels Hofmeyr | 25f69d5 | 2018-03-10 03:44:06 +0100 | [diff] [blame] | 989 | return vlr_subscr_rx_auth_resp(conn->vsub, classmark_is_r99(&conn->classmark), |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 990 | conn->via_ran == RAN_UTRAN_IU, |
| 991 | res, res_len); |
Sylvain Munaut | 30a1538 | 2009-12-24 00:27:26 +0100 | [diff] [blame] | 992 | } |
| 993 | |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 994 | static int gsm48_rx_mm_auth_fail(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| 995 | { |
| 996 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 997 | uint8_t cause; |
| 998 | uint8_t auts_tag; |
| 999 | uint8_t auts_len; |
| 1000 | uint8_t *auts; |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1001 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1002 | if (!conn->vsub) { |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1003 | LOGP(DMM, LOGL_ERROR, |
| 1004 | "MM R99 AUTHENTICATION FAILURE: invalid: no subscriber\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1005 | msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1006 | return -EINVAL; |
| 1007 | } |
| 1008 | |
| 1009 | if (msgb_l3len(msg) < sizeof(*gh) + 1) { |
| 1010 | LOGP(DMM, LOGL_ERROR, |
| 1011 | "%s: MM R99 AUTHENTICATION FAILURE:" |
| 1012 | " l3 length invalid: %u\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1013 | vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
| 1014 | msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1015 | return -EINVAL; |
| 1016 | } |
| 1017 | |
| 1018 | cause = gh->data[0]; |
| 1019 | |
| 1020 | if (cause != GSM48_REJECT_SYNCH_FAILURE) { |
| 1021 | LOGP(DMM, LOGL_INFO, |
| 1022 | "%s: MM R99 AUTHENTICATION FAILURE: cause 0x%0x\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1023 | vlr_subscr_name(conn->vsub), cause); |
| 1024 | vlr_subscr_rx_auth_fail(conn->vsub, NULL); |
| 1025 | return 0; |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1026 | } |
| 1027 | |
| 1028 | /* This is a Synch Failure procedure, which should pass an AUTS to |
| 1029 | * resynchronize the sequence nr with the HLR. Expecting exactly one |
| 1030 | * TLV with 14 bytes of AUTS. */ |
| 1031 | |
| 1032 | if (msgb_l3len(msg) < sizeof(*gh) + 1 + 2) { |
| 1033 | LOGP(DMM, LOGL_INFO, |
| 1034 | "%s: MM R99 AUTHENTICATION FAILURE:" |
| 1035 | " invalid Synch Failure: missing AUTS IE\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1036 | vlr_subscr_name(conn->vsub)); |
| 1037 | msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1038 | return -EINVAL; |
| 1039 | } |
| 1040 | |
| 1041 | auts_tag = gh->data[1]; |
| 1042 | auts_len = gh->data[2]; |
| 1043 | auts = &gh->data[3]; |
| 1044 | |
| 1045 | if (auts_tag != GSM48_IE_AUTS |
| 1046 | || auts_len != 14) { |
| 1047 | LOGP(DMM, LOGL_INFO, |
| 1048 | "%s: MM R99 AUTHENTICATION FAILURE:" |
| 1049 | " invalid Synch Failure:" |
| 1050 | " expected AUTS IE 0x%02x of 14 bytes," |
| 1051 | " got IE 0x%02x of %u bytes\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1052 | vlr_subscr_name(conn->vsub), |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1053 | GSM48_IE_AUTS, auts_tag, auts_len); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1054 | msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1055 | return -EINVAL; |
| 1056 | } |
| 1057 | |
| 1058 | if (msgb_l3len(msg) < sizeof(*gh) + 1 + 2 + auts_len) { |
| 1059 | LOGP(DMM, LOGL_INFO, |
| 1060 | "%s: MM R99 AUTHENTICATION FAILURE:" |
| 1061 | " invalid Synch Failure msg: message truncated (%u)\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1062 | vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
| 1063 | msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1064 | return -EINVAL; |
| 1065 | } |
| 1066 | |
| 1067 | /* We have an AUTS IE with exactly 14 bytes of AUTS and the msgb is |
| 1068 | * large enough. */ |
| 1069 | |
| 1070 | DEBUGP(DMM, "%s: MM R99 AUTHENTICATION SYNCH (AUTS = %s)\n", |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1071 | vlr_subscr_name(conn->vsub), osmo_hexdump_nospc(auts, 14)); |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1072 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1073 | return vlr_subscr_rx_auth_fail(conn->vsub, auts); |
| 1074 | } |
Neels Hofmeyr | 22a735b | 2017-02-03 01:22:40 +0100 | [diff] [blame] | 1075 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1076 | static int gsm48_rx_mm_tmsi_reall_compl(struct gsm_subscriber_connection *conn) |
| 1077 | { |
| 1078 | DEBUGP(DMM, "TMSI Reallocation Completed. Subscriber: %s\n", |
| 1079 | vlr_subscr_name(conn->vsub)); |
| 1080 | if (!conn->vsub) { |
| 1081 | LOGP(DMM, LOGL_ERROR, |
| 1082 | "Rx MM TMSI Reallocation Complete: invalid: no subscriber\n"); |
| 1083 | return -EINVAL; |
| 1084 | } |
| 1085 | return vlr_subscr_rx_tmsi_reall_compl(conn->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 */ |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1089 | static int gsm0408_rcv_mm(struct gsm_subscriber_connection *conn, 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: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1096 | rc = mm_rx_loc_upd_req(conn, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1097 | break; |
| 1098 | case GSM48_MT_MM_ID_RESP: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1099 | rc = mm_rx_id_resp(conn, 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: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1102 | rc = gsm48_rx_mm_serv_req(conn, 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: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1108 | rc = gsm48_rx_mm_tmsi_reall_compl(conn); |
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: |
Holger Hans Peter Freyther | 153b13b | 2012-07-10 08:53:27 +0200 | [diff] [blame] | 1111 | rc = gsm48_rx_mm_imsi_detach_ind(conn, msg); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 1112 | break; |
| 1113 | case GSM48_MT_MM_CM_REEST_REQ: |
Harald Welte | 49f8fcb | 2018-01-24 21:40:19 +0100 | [diff] [blame] | 1114 | rc = gsm48_rx_cm_reest_req(conn, msg); |
Harald Welte | 2a13937 | 2009-02-22 21:14:55 +0000 | [diff] [blame] | 1115 | break; |
| 1116 | case GSM48_MT_MM_AUTH_RESP: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1117 | rc = gsm48_rx_mm_auth_resp(conn, 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: |
| 1120 | rc = gsm48_rx_mm_auth_fail(conn, msg); |
| 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 | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1131 | static uint8_t *gsm48_cm2_get_mi(uint8_t *classmark2_lv, unsigned int tot_len) |
| 1132 | { |
| 1133 | /* Check the size for the classmark */ |
| 1134 | if (tot_len < 1 + *classmark2_lv) |
| 1135 | return NULL; |
| 1136 | |
| 1137 | uint8_t *mi_lv = classmark2_lv + *classmark2_lv + 1; |
| 1138 | if (tot_len < 2 + *classmark2_lv + mi_lv[0]) |
| 1139 | return NULL; |
| 1140 | |
| 1141 | return mi_lv; |
| 1142 | } |
| 1143 | |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1144 | /* Receive a PAGING RESPONSE message from the MS */ |
Holger Hans Peter Freyther | db4ef0d | 2010-06-21 10:46:44 +0800 | [diff] [blame] | 1145 | static int gsm48_rx_rr_pag_resp(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1146 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1147 | struct gsm_network *net = conn->network; |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1148 | struct gsm48_hdr *gh = msgb_l3(msg); |
Holger Hans Peter Freyther | f6903de | 2010-05-16 01:51:14 +0800 | [diff] [blame] | 1149 | struct gsm48_pag_resp *resp; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 1150 | uint8_t *classmark2_lv = gh->data + 1; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1151 | uint8_t *mi_lv; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 1152 | uint8_t mi_type; |
Holger Hans Peter Freyther | d1862d7 | 2009-08-19 07:54:59 +0200 | [diff] [blame] | 1153 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1154 | struct osmo_location_area_id lai; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1155 | bool is_utran; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1156 | |
Neels Hofmeyr | 379d579 | 2018-02-22 04:04:54 +0100 | [diff] [blame] | 1157 | lai.plmn = conn->network->plmn; |
Neels Hofmeyr | e2f24d5 | 2017-05-08 15:12:20 +0200 | [diff] [blame] | 1158 | lai.lac = conn->lac; |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1159 | |
Holger Hans Peter Freyther | f6903de | 2010-05-16 01:51:14 +0800 | [diff] [blame] | 1160 | resp = (struct gsm48_pag_resp *) &gh->data[0]; |
| 1161 | gsm48_paging_extract_mi(resp, msgb_l3len(msg) - sizeof(*gh), |
| 1162 | mi_string, &mi_type); |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1163 | |
| 1164 | if (msc_subscr_conn_is_establishing_auth_ciph(conn)) { |
| 1165 | LOGP(DMM, LOGL_ERROR, |
| 1166 | "Ignoring Paging Response, conn already busy establishing authenticity\n"); |
| 1167 | return 0; |
| 1168 | } |
| 1169 | |
| 1170 | if (msc_subscr_conn_is_accepted(conn)) { |
| 1171 | LOGP(DMM, LOGL_ERROR, "Ignoring Paging Response, conn already established\n"); |
| 1172 | return 0; |
| 1173 | } |
| 1174 | |
| 1175 | DEBUGP(DRR, "PAGING RESPONSE: MI(%s)=%s\n", gsm48_mi_type_name(mi_type), mi_string); |
Harald Welte | 3ac7f10 | 2009-08-10 10:12:45 +0200 | [diff] [blame] | 1176 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1177 | mi_lv = gsm48_cm2_get_mi(classmark2_lv, msgb_l3len(msg) - sizeof(*gh)); |
| 1178 | if (!mi_lv) { |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1179 | LOGP(DRR, LOGL_ERROR, "PAGING RESPONSE: invalid Mobile Identity\n"); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1180 | return -1; |
Harald Welte | fe18d8f | 2009-02-22 21:14:24 +0000 | [diff] [blame] | 1181 | } |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1182 | |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 1183 | msc_subscr_conn_update_id(conn, COMPLETE_LAYER3_PAGING_RESP, mi_string); |
Neels Hofmeyr | 6d804b1 | 2017-02-18 22:20:46 +0100 | [diff] [blame] | 1184 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1185 | memcpy(conn->classmark.classmark2, classmark2_lv+1, *classmark2_lv); |
| 1186 | conn->classmark.classmark2_len = *classmark2_lv; |
Neels Hofmeyr | 6d804b1 | 2017-02-18 22:20:46 +0100 | [diff] [blame] | 1187 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1188 | is_utran = (conn->via_ran == RAN_UTRAN_IU); |
Neels Hofmeyr | 4d3a66b | 2018-03-31 18:45:59 +0200 | [diff] [blame] | 1189 | vlr_proc_acc_req(conn->fi, |
Neels Hofmeyr | 16c42b5 | 2018-04-02 12:26:16 +0200 | [diff] [blame] | 1190 | SUBSCR_CONN_E_ACCEPTED, SUBSCR_CONN_E_CN_CLOSE, NULL, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1191 | net->vlr, conn, |
| 1192 | VLR_PR_ARQ_T_PAGING_RESP, mi_lv, &lai, |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1193 | is_utran || conn->network->authentication_required, |
Harald Welte | 7b222aa | 2017-12-23 19:30:32 +0100 | [diff] [blame] | 1194 | is_utran || conn->network->a5_encryption_mask > 0x01, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1195 | classmark_is_r99(&conn->classmark), |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1196 | is_utran); |
Holger Freyther | 053e09d | 2009-02-14 22:51:06 +0000 | [diff] [blame] | 1197 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1198 | msc_subscr_conn_complete_layer_3(conn); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1199 | return 0; |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1200 | } |
| 1201 | |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1202 | static int gsm48_rx_rr_app_info(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1203 | { |
| 1204 | struct gsm48_hdr *gh = msgb_l3(msg); |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 1205 | uint8_t apdu_id_flags; |
| 1206 | uint8_t apdu_len; |
| 1207 | uint8_t *apdu_data; |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1208 | |
| 1209 | apdu_id_flags = gh->data[0]; |
| 1210 | apdu_len = gh->data[1]; |
| 1211 | apdu_data = gh->data+2; |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 1212 | |
Max | 8dc8f23 | 2017-02-09 19:13:02 +0100 | [diff] [blame] | 1213 | 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] | 1214 | apdu_id_flags, apdu_len, osmo_hexdump(apdu_data, apdu_len)); |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1215 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1216 | /* we're not using the app info blob anywhere, so ignore. */ |
| 1217 | #if 0 |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1218 | 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] | 1219 | #else |
| 1220 | return 0; |
| 1221 | #endif |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1222 | } |
| 1223 | |
Harald Welte | bf5e8df | 2009-02-03 12:59:45 +0000 | [diff] [blame] | 1224 | /* Receive a GSM 04.08 Radio Resource (RR) message */ |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1225 | static int gsm0408_rcv_rr(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1226 | { |
| 1227 | struct gsm48_hdr *gh = msgb_l3(msg); |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1228 | int rc = 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1229 | |
| 1230 | switch (gh->msg_type) { |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1231 | case GSM48_MT_RR_PAG_RESP: |
Holger Hans Peter Freyther | db4ef0d | 2010-06-21 10:46:44 +0800 | [diff] [blame] | 1232 | rc = gsm48_rx_rr_pag_resp(conn, msg); |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1233 | break; |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1234 | case GSM48_MT_RR_APP_INFO: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1235 | rc = gsm48_rx_rr_app_info(conn, msg); |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1236 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1237 | default: |
Philipp | d37981e | 2016-10-10 15:11:41 +0200 | [diff] [blame] | 1238 | LOGP(DRR, LOGL_NOTICE, "MSC: Unimplemented %s GSM 04.08 RR " |
| 1239 | "message\n", gsm48_rr_msg_name(gh->msg_type)); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1240 | break; |
| 1241 | } |
| 1242 | |
Harald Welte | 2d35ae6 | 2009-02-06 12:02:13 +0000 | [diff] [blame] | 1243 | return rc; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1244 | } |
| 1245 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 1246 | int gsm48_send_rr_app_info(struct gsm_subscriber_connection *conn, uint8_t apdu_id, |
| 1247 | uint8_t apdu_len, const uint8_t *apdu) |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1248 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1249 | 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] | 1250 | struct gsm48_hdr *gh; |
| 1251 | |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1252 | DEBUGP(DRR, "TX APPLICATION INFO id=0x%02x, len=%u\n", |
| 1253 | apdu_id, apdu_len); |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 1254 | |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1255 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2 + apdu_len); |
| 1256 | gh->proto_discr = GSM48_PDISC_RR; |
| 1257 | gh->msg_type = GSM48_MT_RR_APP_INFO; |
| 1258 | gh->data[0] = apdu_id; |
| 1259 | gh->data[1] = apdu_len; |
| 1260 | memcpy(gh->data+2, apdu, apdu_len); |
| 1261 | |
Holger Hans Peter Freyther | 9ce1b27 | 2010-06-16 13:52:55 +0800 | [diff] [blame] | 1262 | return gsm48_conn_sendmsg(msg, conn, NULL); |
Harald Welte (local) | 6eef564 | 2009-08-15 23:32:44 +0200 | [diff] [blame] | 1263 | } |
| 1264 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1265 | static bool msg_is_initially_permitted(const struct gsm48_hdr *hdr) |
Holger Hans Peter Freyther | 02d39b2 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 1266 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1267 | uint8_t pdisc = gsm48_hdr_pdisc(hdr); |
| 1268 | uint8_t msg_type = gsm48_hdr_msg_type(hdr); |
Holger Hans Peter Freyther | 02d39b2 | 2010-07-05 15:34:16 +0800 | [diff] [blame] | 1269 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1270 | switch (pdisc) { |
| 1271 | case GSM48_PDISC_MM: |
| 1272 | switch (msg_type) { |
| 1273 | case GSM48_MT_MM_LOC_UPD_REQUEST: |
| 1274 | case GSM48_MT_MM_CM_SERV_REQ: |
Harald Welte | 49f8fcb | 2018-01-24 21:40:19 +0100 | [diff] [blame] | 1275 | case GSM48_MT_MM_CM_REEST_REQ: |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1276 | case GSM48_MT_MM_AUTH_RESP: |
| 1277 | case GSM48_MT_MM_AUTH_FAIL: |
| 1278 | case GSM48_MT_MM_ID_RESP: |
| 1279 | case GSM48_MT_MM_TMSI_REALL_COMPL: |
| 1280 | case GSM48_MT_MM_IMSI_DETACH_IND: |
| 1281 | return true; |
| 1282 | default: |
| 1283 | break; |
| 1284 | } |
| 1285 | break; |
| 1286 | case GSM48_PDISC_RR: |
| 1287 | switch (msg_type) { |
| 1288 | case GSM48_MT_RR_CIPH_M_COMPL: |
| 1289 | case GSM48_MT_RR_PAG_RESP: |
| 1290 | return true; |
| 1291 | default: |
| 1292 | break; |
| 1293 | } |
| 1294 | break; |
| 1295 | default: |
| 1296 | break; |
Neels Hofmeyr | 42eb014 | 2016-05-20 17:15:44 +0200 | [diff] [blame] | 1297 | } |
| 1298 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1299 | return false; |
Neels Hofmeyr | 42eb014 | 2016-05-20 17:15:44 +0200 | [diff] [blame] | 1300 | } |
| 1301 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1302 | void cm_service_request_concludes(struct gsm_subscriber_connection *conn, |
| 1303 | struct msgb *msg) |
| 1304 | { |
| 1305 | |
| 1306 | /* If a CM Service Request was received before, this is the request the |
| 1307 | * conn was opened for. No need to wait for further messages. */ |
| 1308 | |
| 1309 | if (!conn->received_cm_service_request) |
| 1310 | return; |
| 1311 | |
| 1312 | if (log_check_level(DMM, LOGL_DEBUG)) { |
| 1313 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1314 | uint8_t pdisc = gsm48_hdr_pdisc(gh); |
| 1315 | uint8_t msg_type = gsm48_hdr_msg_type(gh); |
| 1316 | |
Neels Hofmeyr | 78ada64 | 2017-03-10 02:15:20 +0100 | [diff] [blame] | 1317 | DEBUGP(DMM, "%s: rx msg %s:" |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1318 | " received_cm_service_request changes to false\n", |
| 1319 | vlr_subscr_name(conn->vsub), |
Neels Hofmeyr | 78ada64 | 2017-03-10 02:15:20 +0100 | [diff] [blame] | 1320 | gsm48_pdisc_msgtype_name(pdisc, msg_type)); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1321 | } |
| 1322 | conn->received_cm_service_request = false; |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1323 | msc_subscr_conn_put(conn, MSC_CONN_USE_CM_SERVICE); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1324 | } |
| 1325 | |
Harald Welte | c200785 | 2018-02-03 21:08:26 +0100 | [diff] [blame] | 1326 | /* TS 24.007 11.2.3.2.3 Message Type Octet / Duplicate Detection */ |
| 1327 | int gsm0407_pdisc_ctr_bin(uint8_t pdisc) |
| 1328 | { |
| 1329 | switch (pdisc) { |
| 1330 | case GSM48_PDISC_MM: |
| 1331 | case GSM48_PDISC_CC: |
| 1332 | case GSM48_PDISC_NC_SS: |
| 1333 | return 0; |
| 1334 | case GSM48_PDISC_GROUP_CC: |
| 1335 | return 1; |
| 1336 | case GSM48_PDISC_BCAST_CC: |
| 1337 | return 2; |
| 1338 | case GSM48_PDISC_LOC: |
| 1339 | return 3; |
| 1340 | default: |
| 1341 | return -1; |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | /* extract the N(SD) and return the modulo value for a R98 message */ |
| 1346 | static uint8_t gsm0407_determine_nsd_ret_modulo_r99(uint8_t pdisc, uint8_t msg_type, uint8_t *n_sd) |
| 1347 | { |
| 1348 | switch (pdisc) { |
| 1349 | case GSM48_PDISC_MM: |
| 1350 | case GSM48_PDISC_CC: |
| 1351 | case GSM48_PDISC_NC_SS: |
| 1352 | *n_sd = (msg_type >> 6) & 0x3; |
| 1353 | return 4; |
| 1354 | case GSM48_PDISC_GROUP_CC: |
| 1355 | case GSM48_PDISC_BCAST_CC: |
| 1356 | case GSM48_PDISC_LOC: |
| 1357 | *n_sd = (msg_type >> 6) & 0x1; |
| 1358 | return 2; |
| 1359 | default: |
| 1360 | /* no sequence number, we cannot detect dups */ |
| 1361 | return 0; |
| 1362 | } |
| 1363 | } |
| 1364 | |
| 1365 | /* extract the N(SD) and return the modulo value for a R99 message */ |
| 1366 | static uint8_t gsm0407_determine_nsd_ret_modulo_r98(uint8_t pdisc, uint8_t msg_type, uint8_t *n_sd) |
| 1367 | { |
| 1368 | switch (pdisc) { |
| 1369 | case GSM48_PDISC_MM: |
| 1370 | case GSM48_PDISC_CC: |
| 1371 | case GSM48_PDISC_NC_SS: |
| 1372 | case GSM48_PDISC_GROUP_CC: |
| 1373 | case GSM48_PDISC_BCAST_CC: |
| 1374 | case GSM48_PDISC_LOC: |
| 1375 | *n_sd = (msg_type >> 6) & 0x1; |
| 1376 | return 2; |
| 1377 | default: |
| 1378 | /* no sequence number, we cannot detect dups */ |
| 1379 | return 0; |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | /* TS 24.007 11.2.3.2 Message Type Octet / Duplicate Detection */ |
| 1384 | static bool gsm0407_is_duplicate(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| 1385 | { |
| 1386 | struct gsm48_hdr *gh; |
| 1387 | uint8_t pdisc; |
| 1388 | uint8_t n_sd, modulo, bin; |
| 1389 | |
| 1390 | gh = msgb_l3(msg); |
| 1391 | pdisc = gsm48_hdr_pdisc(gh); |
| 1392 | |
| 1393 | if (conn->classmark.classmark1_set && conn->classmark.classmark1.rev_lev < 2) { |
| 1394 | modulo = gsm0407_determine_nsd_ret_modulo_r98(pdisc, gh->msg_type, &n_sd); |
| 1395 | } else { /* R99 */ |
| 1396 | modulo = gsm0407_determine_nsd_ret_modulo_r99(pdisc, gh->msg_type, &n_sd); |
| 1397 | } |
| 1398 | if (modulo == 0) |
| 1399 | return false; |
| 1400 | bin = gsm0407_pdisc_ctr_bin(pdisc); |
| 1401 | if (bin < 0) |
| 1402 | return false; |
| 1403 | |
| 1404 | OSMO_ASSERT(bin < ARRAY_SIZE(conn->n_sd_next)); |
| 1405 | if (n_sd != conn->n_sd_next[bin]) { |
| 1406 | /* not what we expected: duplicate */ |
| 1407 | return true; |
| 1408 | } else { |
| 1409 | /* as expected: no dup; update expected counter for next message */ |
| 1410 | conn->n_sd_next[bin] = (n_sd + 1) % modulo; |
| 1411 | return false; |
| 1412 | } |
| 1413 | } |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1414 | |
Harald Welte | 27989d4 | 2018-06-21 20:39:20 +0200 | [diff] [blame] | 1415 | extern int gsm0408_rcv_cc(struct gsm_subscriber_connection *conn, struct msgb *msg); |
| 1416 | |
Neels Hofmeyr | 378a492 | 2016-05-09 21:07:43 +0200 | [diff] [blame] | 1417 | /* Main entry point for GSM 04.08/44.008 Layer 3 data (e.g. from the BSC). */ |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 1418 | int gsm0408_dispatch(struct gsm_subscriber_connection *conn, struct msgb *msg) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1419 | { |
Philipp Maier | 91f10c7 | 2017-04-20 18:40:37 +0200 | [diff] [blame] | 1420 | struct gsm48_hdr *gh; |
| 1421 | uint8_t pdisc; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 1422 | int rc = 0; |
Harald Welte | 5100877 | 2009-12-29 11:49:12 +0100 | [diff] [blame] | 1423 | |
Neels Hofmeyr | 0906a39 | 2017-09-19 14:36:06 +0200 | [diff] [blame] | 1424 | OSMO_ASSERT(msg->l3h); |
Neels Hofmeyr | ffaed9e | 2016-05-09 21:38:51 +0200 | [diff] [blame] | 1425 | OSMO_ASSERT(conn); |
| 1426 | OSMO_ASSERT(msg); |
| 1427 | |
Philipp Maier | 91f10c7 | 2017-04-20 18:40:37 +0200 | [diff] [blame] | 1428 | gh = msgb_l3(msg); |
| 1429 | pdisc = gsm48_hdr_pdisc(gh); |
| 1430 | |
Harald Welte | c200785 | 2018-02-03 21:08:26 +0100 | [diff] [blame] | 1431 | if (gsm0407_is_duplicate(conn, msg)) { |
| 1432 | LOGP(DRLL, LOGL_NOTICE, "%s: Discarding duplicate L3 message\n", |
| 1433 | (conn && conn->vsub) ? vlr_subscr_name(conn->vsub) : "UNKNOWN"); |
| 1434 | return 0; |
| 1435 | } |
| 1436 | |
Neels Hofmeyr | 78ada64 | 2017-03-10 02:15:20 +0100 | [diff] [blame] | 1437 | LOGP(DRLL, LOGL_DEBUG, "Dispatching 04.08 message %s (0x%x:0x%x)\n", |
| 1438 | gsm48_pdisc_msgtype_name(pdisc, gsm48_hdr_msg_type(gh)), |
| 1439 | pdisc, gsm48_hdr_msg_type(gh)); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1440 | |
| 1441 | if (!msc_subscr_conn_is_accepted(conn) |
| 1442 | && !msg_is_initially_permitted(gh)) { |
| 1443 | LOGP(DRLL, LOGL_ERROR, |
Neels Hofmeyr | 78ada64 | 2017-03-10 02:15:20 +0100 | [diff] [blame] | 1444 | "subscr %s: Message not permitted for initial conn: %s\n", |
| 1445 | vlr_subscr_name(conn->vsub), |
| 1446 | gsm48_pdisc_msgtype_name(pdisc, gsm48_hdr_msg_type(gh))); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1447 | return -EACCES; |
| 1448 | } |
| 1449 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1450 | if (conn->vsub && conn->vsub->cs.attached_via_ran != conn->via_ran) { |
| 1451 | LOGP(DMM, LOGL_ERROR, |
| 1452 | "%s: Illegal situation: RAN type mismatch:" |
| 1453 | " attached via %s, received message via %s\n", |
| 1454 | vlr_subscr_name(conn->vsub), |
| 1455 | ran_type_name(conn->vsub->cs.attached_via_ran), |
| 1456 | ran_type_name(conn->via_ran)); |
| 1457 | return -EACCES; |
| 1458 | } |
| 1459 | |
Philipp Maier | e0d5caa | 2017-02-27 16:56:59 +0100 | [diff] [blame] | 1460 | #if 0 |
Holger Hans Peter Freyther | 758f4df | 2010-06-21 10:34:03 +0800 | [diff] [blame] | 1461 | if (silent_call_reroute(conn, msg)) |
| 1462 | return silent_call_rx(conn, msg); |
Philipp Maier | e0d5caa | 2017-02-27 16:56:59 +0100 | [diff] [blame] | 1463 | #endif |
Alexander Couzens | fbd96f5 | 2016-08-29 18:40:02 +0200 | [diff] [blame] | 1464 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1465 | switch (pdisc) { |
| 1466 | case GSM48_PDISC_CC: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1467 | rc = gsm0408_rcv_cc(conn, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1468 | break; |
| 1469 | case GSM48_PDISC_MM: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1470 | rc = gsm0408_rcv_mm(conn, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1471 | break; |
| 1472 | case GSM48_PDISC_RR: |
Holger Hans Peter Freyther | 3f122be | 2010-06-17 17:14:35 +0800 | [diff] [blame] | 1473 | rc = gsm0408_rcv_rr(conn, msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1474 | break; |
Harald Welte | bcae43f | 2008-12-27 21:45:37 +0000 | [diff] [blame] | 1475 | case GSM48_PDISC_SMS: |
Holger Hans Peter Freyther | 9764331 | 2010-06-17 16:41:25 +0800 | [diff] [blame] | 1476 | rc = gsm0411_rcv_sms(conn, msg); |
Harald Welte | bcae43f | 2008-12-27 21:45:37 +0000 | [diff] [blame] | 1477 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1478 | case GSM48_PDISC_MM_GPRS: |
Harald Welte | bcae43f | 2008-12-27 21:45:37 +0000 | [diff] [blame] | 1479 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 5d24ba1 | 2009-12-24 12:13:17 +0100 | [diff] [blame] | 1480 | LOGP(DRLL, LOGL_NOTICE, "Unimplemented " |
| 1481 | "GSM 04.08 discriminator 0x%02x\n", pdisc); |
Neels Hofmeyr | ffaed9e | 2016-05-09 21:38:51 +0200 | [diff] [blame] | 1482 | rc = -ENOTSUP; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1483 | break; |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 1484 | case GSM48_PDISC_NC_SS: |
Vadim Yanitskiy | 5b860fa | 2018-06-12 05:24:52 +0700 | [diff] [blame] | 1485 | rc = gsm0911_rcv_nc_ss(conn, msg); |
Harald Welte | 6eafe91 | 2009-10-16 08:32:58 +0200 | [diff] [blame] | 1486 | break; |
Harald Welte | eac38c3 | 2017-05-29 18:02:53 +0200 | [diff] [blame] | 1487 | case GSM48_PDISC_TEST: |
| 1488 | rc = gsm0414_rcv_test(conn, msg); |
| 1489 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1490 | default: |
Harald Welte | 5d24ba1 | 2009-12-24 12:13:17 +0100 | [diff] [blame] | 1491 | LOGP(DRLL, LOGL_NOTICE, "Unknown " |
| 1492 | "GSM 04.08 discriminator 0x%02x\n", pdisc); |
Neels Hofmeyr | ffaed9e | 2016-05-09 21:38:51 +0200 | [diff] [blame] | 1493 | rc = -EINVAL; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1494 | break; |
| 1495 | } |
| 1496 | |
| 1497 | return rc; |
| 1498 | } |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 1499 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1500 | /*********************************************************************** |
| 1501 | * VLR integration |
| 1502 | ***********************************************************************/ |
| 1503 | |
| 1504 | /* VLR asks us to send an authentication request */ |
| 1505 | static int msc_vlr_tx_auth_req(void *msc_conn_ref, struct gsm_auth_tuple *at, |
| 1506 | bool send_autn) |
| 1507 | { |
| 1508 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1509 | return gsm48_tx_mm_auth_req(conn, at->vec.rand, |
| 1510 | send_autn? at->vec.autn : NULL, |
| 1511 | at->key_seq); |
| 1512 | } |
| 1513 | |
| 1514 | /* VLR asks us to send an authentication reject */ |
| 1515 | static int msc_vlr_tx_auth_rej(void *msc_conn_ref) |
| 1516 | { |
| 1517 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1518 | return gsm48_tx_mm_auth_rej(conn); |
| 1519 | } |
| 1520 | |
| 1521 | /* VLR asks us to transmit an Identity Request of given type */ |
| 1522 | static int msc_vlr_tx_id_req(void *msc_conn_ref, uint8_t mi_type) |
| 1523 | { |
| 1524 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1525 | return mm_tx_identity_req(conn, mi_type); |
| 1526 | } |
| 1527 | |
| 1528 | /* VLR asks us to transmit a Location Update Accept */ |
| 1529 | static int msc_vlr_tx_lu_acc(void *msc_conn_ref, uint32_t send_tmsi) |
| 1530 | { |
| 1531 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1532 | return gsm0408_loc_upd_acc(conn, send_tmsi); |
| 1533 | } |
| 1534 | |
| 1535 | /* VLR asks us to transmit a Location Update Reject */ |
Neels Hofmeyr | 1580959 | 2018-04-06 02:57:51 +0200 | [diff] [blame] | 1536 | 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] | 1537 | { |
| 1538 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1539 | return gsm0408_loc_upd_rej(conn, cause); |
| 1540 | } |
| 1541 | |
| 1542 | /* VLR asks us to transmit a CM Service Accept */ |
| 1543 | static int msc_vlr_tx_cm_serv_acc(void *msc_conn_ref) |
| 1544 | { |
| 1545 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1546 | return msc_gsm48_tx_mm_serv_ack(conn); |
| 1547 | } |
| 1548 | |
| 1549 | static int msc_vlr_tx_common_id(void *msc_conn_ref) |
| 1550 | { |
| 1551 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1552 | return msc_tx_common_id(conn); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1553 | } |
| 1554 | |
Stefan Sperling | 3a74128 | 2018-03-13 21:11:49 +0100 | [diff] [blame] | 1555 | /* VLR asks us to transmit MM info. */ |
| 1556 | static int msc_vlr_tx_mm_info(void *msc_conn_ref) |
| 1557 | { |
| 1558 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1559 | if (!conn->network->send_mm_info) |
| 1560 | return 0; |
| 1561 | return gsm48_tx_mm_info(conn); |
| 1562 | } |
| 1563 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1564 | /* VLR asks us to transmit a CM Service Reject */ |
Neels Hofmeyr | 1580959 | 2018-04-06 02:57:51 +0200 | [diff] [blame] | 1565 | static int msc_vlr_tx_cm_serv_rej(void *msc_conn_ref, enum gsm48_reject_value cause) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1566 | { |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1567 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1568 | int rc; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1569 | |
Neels Hofmeyr | e3d3dc6 | 2018-03-31 00:02:14 +0200 | [diff] [blame] | 1570 | rc = msc_gsm48_tx_mm_serv_rej(conn, cause); |
| 1571 | |
| 1572 | if (conn->received_cm_service_request) { |
| 1573 | conn->received_cm_service_request = false; |
| 1574 | msc_subscr_conn_put(conn, MSC_CONN_USE_CM_SERVICE); |
| 1575 | } |
| 1576 | |
| 1577 | return rc; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1578 | } |
| 1579 | |
Neels Hofmeyr | 703638e | 2017-12-14 05:30:16 +0100 | [diff] [blame] | 1580 | /* For msc_vlr_set_ciph_mode() */ |
| 1581 | osmo_static_assert(sizeof(((struct gsm0808_encrypt_info*)0)->key) >= sizeof(((struct osmo_auth_vector*)0)->kc), |
| 1582 | gsm0808_encrypt_info_key_fits_osmo_auth_vec_kc); |
| 1583 | |
Neels Hofmeyr | da21a52 | 2018-03-02 01:50:09 +0100 | [diff] [blame] | 1584 | /* VLR asks us to start using ciphering. |
| 1585 | * (Keep non-static to allow regression testing on this function.) */ |
| 1586 | int msc_vlr_set_ciph_mode(void *msc_conn_ref, |
| 1587 | bool umts_aka, |
| 1588 | bool retrieve_imeisv) |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1589 | { |
| 1590 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
| 1591 | struct vlr_subscr *vsub; |
| 1592 | struct gsm_auth_tuple *tuple; |
| 1593 | |
| 1594 | if (!conn || !conn->vsub) { |
| 1595 | LOGP(DMM, LOGL_ERROR, "Cannot send Ciphering Mode Command to" |
| 1596 | " NULL conn/subscriber"); |
| 1597 | return -EINVAL; |
| 1598 | } |
| 1599 | |
| 1600 | vsub = conn->vsub; |
| 1601 | tuple = vsub->last_tuple; |
| 1602 | |
| 1603 | if (!tuple) { |
| 1604 | LOGP(DMM, LOGL_ERROR, "subscr %s: Cannot send Ciphering Mode" |
| 1605 | " Command: no auth tuple available\n", |
| 1606 | vlr_subscr_name(vsub)); |
| 1607 | return -EINVAL; |
| 1608 | } |
| 1609 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1610 | switch (conn->via_ran) { |
| 1611 | case RAN_GERAN_A: |
| 1612 | DEBUGP(DMM, "-> CIPHER MODE COMMAND %s\n", |
| 1613 | vlr_subscr_name(conn->vsub)); |
Neels Hofmeyr | 703638e | 2017-12-14 05:30:16 +0100 | [diff] [blame] | 1614 | { |
Harald Welte | 7b222aa | 2017-12-23 19:30:32 +0100 | [diff] [blame] | 1615 | struct gsm_network *net = conn->network; |
Neels Hofmeyr | 703638e | 2017-12-14 05:30:16 +0100 | [diff] [blame] | 1616 | struct gsm0808_encrypt_info ei; |
Harald Welte | 7b222aa | 2017-12-23 19:30:32 +0100 | [diff] [blame] | 1617 | int i, j = 0; |
Neels Hofmeyr | 703638e | 2017-12-14 05:30:16 +0100 | [diff] [blame] | 1618 | |
Harald Welte | 7b222aa | 2017-12-23 19:30:32 +0100 | [diff] [blame] | 1619 | for (i = 0; i < 8; i++) { |
Harald Welte | 7133072 | 2017-12-23 19:59:02 +0100 | [diff] [blame] | 1620 | if (net->a5_encryption_mask & (1 << i) && |
| 1621 | classmark_supports_a5(&conn->classmark, i)) |
Harald Welte | 7b222aa | 2017-12-23 19:30:32 +0100 | [diff] [blame] | 1622 | ei.perm_algo[j++] = vlr_ciph_to_gsm0808_alg_id(i); |
| 1623 | } |
| 1624 | ei.perm_algo_len = j; |
Neels Hofmeyr | 703638e | 2017-12-14 05:30:16 +0100 | [diff] [blame] | 1625 | |
Harald Welte | 7133072 | 2017-12-23 19:59:02 +0100 | [diff] [blame] | 1626 | if (ei.perm_algo_len == 0) { |
| 1627 | LOGP(DMM, LOGL_ERROR, "%s: cannot start ciphering, no intersection " |
| 1628 | "between MSC-configured and MS-supported A5 algorithms\n", |
| 1629 | vlr_subscr_name(conn->vsub)); |
| 1630 | return -ENOTSUP; |
| 1631 | } |
| 1632 | |
Neels Hofmeyr | 5282171 | 2017-12-18 01:23:42 +0100 | [diff] [blame] | 1633 | /* In case of UMTS AKA, the Kc for ciphering must be derived from the 3G auth |
| 1634 | * tokens. tuple->vec.kc was calculated from the GSM algorithm and is not |
| 1635 | * necessarily a match for the UMTS AKA tokens. */ |
| 1636 | if (umts_aka) |
| 1637 | osmo_auth_c3(ei.key, tuple->vec.ck, tuple->vec.ik); |
| 1638 | else |
| 1639 | memcpy(ei.key, tuple->vec.kc, sizeof(tuple->vec.kc)); |
Neels Hofmeyr | 703638e | 2017-12-14 05:30:16 +0100 | [diff] [blame] | 1640 | ei.key_len = sizeof(tuple->vec.kc); |
| 1641 | |
| 1642 | return a_iface_tx_cipher_mode(conn, &ei, retrieve_imeisv); |
| 1643 | } |
| 1644 | |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1645 | case RAN_UTRAN_IU: |
| 1646 | #ifdef BUILD_IU |
| 1647 | DEBUGP(DMM, "-> SECURITY MODE CONTROL %s\n", |
| 1648 | vlr_subscr_name(conn->vsub)); |
Neels Hofmeyr | 00e82d6 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 1649 | return ranap_iu_tx_sec_mode_cmd(conn->iu.ue_ctx, &tuple->vec, 0, 1); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1650 | #else |
| 1651 | LOGP(DMM, LOGL_ERROR, "Cannot send Security Mode Control over RAN_UTRAN_IU," |
| 1652 | " built without Iu support\n"); |
| 1653 | return -ENOTSUP; |
| 1654 | #endif |
| 1655 | |
| 1656 | default: |
| 1657 | break; |
| 1658 | } |
| 1659 | LOGP(DMM, LOGL_ERROR, |
| 1660 | "%s: cannot start ciphering, unknown RAN type %d\n", |
| 1661 | vlr_subscr_name(conn->vsub), conn->via_ran); |
| 1662 | return -ENOTSUP; |
| 1663 | } |
| 1664 | |
| 1665 | void msc_rx_sec_mode_compl(struct gsm_subscriber_connection *conn) |
| 1666 | { |
| 1667 | struct vlr_ciph_result vlr_res = {}; |
| 1668 | |
| 1669 | if (!conn || !conn->vsub) { |
| 1670 | LOGP(DMM, LOGL_ERROR, |
| 1671 | "Rx Security Mode Complete for invalid conn\n"); |
| 1672 | return; |
| 1673 | } |
| 1674 | |
| 1675 | DEBUGP(DMM, "<- SECURITY MODE COMPLETE %s\n", |
| 1676 | vlr_subscr_name(conn->vsub)); |
| 1677 | |
| 1678 | vlr_res.cause = VLR_CIPH_COMPL; |
| 1679 | vlr_subscr_rx_ciph_res(conn->vsub, &vlr_res); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1680 | } |
| 1681 | |
| 1682 | /* VLR informs us that the subscriber data has somehow been modified */ |
| 1683 | static void msc_vlr_subscr_update(struct vlr_subscr *subscr) |
| 1684 | { |
Max | a263bb2 | 2017-12-27 13:23:44 +0100 | [diff] [blame] | 1685 | LOGVSUBP(LOGL_NOTICE, subscr, "VLR: update for IMSI=%s (MSISDN=%s, used=%d)\n", |
| 1686 | subscr->imsi, subscr->msisdn, subscr->use_count); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1687 | } |
| 1688 | |
| 1689 | /* VLR informs us that the subscriber has been associated with a conn */ |
| 1690 | static void msc_vlr_subscr_assoc(void *msc_conn_ref, |
| 1691 | struct vlr_subscr *vsub) |
| 1692 | { |
| 1693 | struct gsm_subscriber_connection *conn = msc_conn_ref; |
Max | 48d4ec0 | 2018-02-12 16:51:03 +0100 | [diff] [blame] | 1694 | OSMO_ASSERT(vsub); |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1695 | OSMO_ASSERT(!conn->vsub); |
| 1696 | conn->vsub = vlr_subscr_get(vsub); |
Max | 48d4ec0 | 2018-02-12 16:51:03 +0100 | [diff] [blame] | 1697 | OSMO_ASSERT(conn->vsub); |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1698 | conn->vsub->cs.attached_via_ran = conn->via_ran; |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1699 | } |
| 1700 | |
Vadim Yanitskiy | 8a0e258 | 2018-06-14 03:54:33 +0700 | [diff] [blame] | 1701 | static int msc_vlr_route_gsup_msg(struct vlr_subscr *vsub, |
| 1702 | struct osmo_gsup_message *gsup_msg) |
| 1703 | { |
| 1704 | switch (gsup_msg->message_type) { |
Vadim Yanitskiy | 8a6ef55 | 2018-06-12 08:21:20 +0700 | [diff] [blame] | 1705 | /* GSM 09.11 code implementing SS/USSD */ |
| 1706 | case OSMO_GSUP_MSGT_PROC_SS_REQUEST: |
| 1707 | case OSMO_GSUP_MSGT_PROC_SS_RESULT: |
| 1708 | case OSMO_GSUP_MSGT_PROC_SS_ERROR: |
| 1709 | DEBUGP(DMSC, "Routed to GSM 09.11 SS/USSD handler\n"); |
| 1710 | return gsm0911_gsup_handler(vsub, gsup_msg); |
| 1711 | |
Vadim Yanitskiy | 8a0e258 | 2018-06-14 03:54:33 +0700 | [diff] [blame] | 1712 | default: |
| 1713 | LOGP(DMM, LOGL_ERROR, "No handler found for %s, dropping message...\n", |
| 1714 | osmo_gsup_message_type_name(gsup_msg->message_type)); |
| 1715 | return -GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL; |
| 1716 | } |
| 1717 | } |
| 1718 | |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1719 | /* operations that we need to implement for libvlr */ |
| 1720 | static const struct vlr_ops msc_vlr_ops = { |
| 1721 | .tx_auth_req = msc_vlr_tx_auth_req, |
| 1722 | .tx_auth_rej = msc_vlr_tx_auth_rej, |
| 1723 | .tx_id_req = msc_vlr_tx_id_req, |
| 1724 | .tx_lu_acc = msc_vlr_tx_lu_acc, |
| 1725 | .tx_lu_rej = msc_vlr_tx_lu_rej, |
| 1726 | .tx_cm_serv_acc = msc_vlr_tx_cm_serv_acc, |
| 1727 | .tx_cm_serv_rej = msc_vlr_tx_cm_serv_rej, |
| 1728 | .set_ciph_mode = msc_vlr_set_ciph_mode, |
Neels Hofmeyr | 84da6b1 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1729 | .tx_common_id = msc_vlr_tx_common_id, |
Stefan Sperling | 3a74128 | 2018-03-13 21:11:49 +0100 | [diff] [blame] | 1730 | .tx_mm_info = msc_vlr_tx_mm_info, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1731 | .subscr_update = msc_vlr_subscr_update, |
| 1732 | .subscr_assoc = msc_vlr_subscr_assoc, |
Vadim Yanitskiy | 8a0e258 | 2018-06-14 03:54:33 +0700 | [diff] [blame] | 1733 | .forward_gsup_msg = msc_vlr_route_gsup_msg, |
Harald Welte | 2483f1b | 2016-06-19 18:06:02 +0200 | [diff] [blame] | 1734 | }; |
| 1735 | |
| 1736 | /* Allocate net->vlr so that the VTY may configure the VLR's data structures */ |
| 1737 | int msc_vlr_alloc(struct gsm_network *net) |
| 1738 | { |
| 1739 | net->vlr = vlr_alloc(net, &msc_vlr_ops); |
| 1740 | if (!net->vlr) |
| 1741 | return -ENOMEM; |
| 1742 | net->vlr->user_ctx = net; |
| 1743 | return 0; |
| 1744 | } |
| 1745 | |
| 1746 | /* Launch the VLR, i.e. its GSUP connection */ |
| 1747 | int msc_vlr_start(struct gsm_network *net) |
| 1748 | { |
| 1749 | OSMO_ASSERT(net->vlr); |
| 1750 | return vlr_start("MSC", net->vlr, net->gsup_server_addr_str, |
| 1751 | net->gsup_server_port); |
| 1752 | } |
Neels Hofmeyr | 79e580b | 2018-03-22 16:48:22 +0100 | [diff] [blame] | 1753 | |
| 1754 | struct msgb *gsm48_create_mm_serv_rej(enum gsm48_reject_value value) |
| 1755 | { |
| 1756 | struct msgb *msg; |
| 1757 | struct gsm48_hdr *gh; |
| 1758 | |
| 1759 | msg = gsm48_msgb_alloc_name("GSM 04.08 SERV REJ"); |
| 1760 | if (!msg) |
| 1761 | return NULL; |
| 1762 | |
| 1763 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 1764 | gh->proto_discr = GSM48_PDISC_MM; |
| 1765 | gh->msg_type = GSM48_MT_MM_CM_SERV_REJ; |
| 1766 | gh->data[0] = value; |
| 1767 | |
| 1768 | return msg; |
| 1769 | } |
| 1770 | |
| 1771 | struct msgb *gsm48_create_loc_upd_rej(uint8_t cause) |
| 1772 | { |
| 1773 | struct gsm48_hdr *gh; |
| 1774 | struct msgb *msg; |
| 1775 | |
| 1776 | msg = gsm48_msgb_alloc_name("GSM 04.08 LOC UPD REJ"); |
| 1777 | if (!msg) |
| 1778 | return NULL; |
| 1779 | |
| 1780 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 1781 | gh->proto_discr = GSM48_PDISC_MM; |
| 1782 | gh->msg_type = GSM48_MT_MM_LOC_UPD_REJECT; |
| 1783 | gh->data[0] = cause; |
| 1784 | return msg; |
| 1785 | } |
| 1786 | |
| 1787 | int gsm48_extract_mi(uint8_t *classmark2_lv, int length, char *mi_string, uint8_t *mi_type) |
| 1788 | { |
| 1789 | /* Check the size for the classmark */ |
| 1790 | if (length < 1 + *classmark2_lv) |
| 1791 | return -1; |
| 1792 | |
| 1793 | uint8_t *mi_lv = classmark2_lv + *classmark2_lv + 1; |
| 1794 | if (length < 2 + *classmark2_lv + mi_lv[0]) |
| 1795 | return -2; |
| 1796 | |
| 1797 | *mi_type = mi_lv[1] & GSM_MI_TYPE_MASK; |
| 1798 | return gsm48_mi_to_string(mi_string, GSM48_MI_SIZE, mi_lv+1, *mi_lv); |
| 1799 | } |
| 1800 | |
| 1801 | int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length, |
| 1802 | char *mi_string, uint8_t *mi_type) |
| 1803 | { |
| 1804 | static const uint32_t classmark_offset = |
| 1805 | offsetof(struct gsm48_pag_resp, classmark2); |
| 1806 | uint8_t *classmark2_lv = (uint8_t *) &resp->classmark2; |
| 1807 | return gsm48_extract_mi(classmark2_lv, length - classmark_offset, |
| 1808 | mi_string, mi_type); |
| 1809 | } |