Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 4 | /* (C) 2009-2015 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 0e3e88e | 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 | 75bb820 | 2010-03-14 15:45:01 +0800 | [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 | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 18 | * |
Harald Welte | 0e3e88e | 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 | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 27 | #include <stdint.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 28 | #include <errno.h> |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 29 | #include <stdbool.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 30 | #include <netinet/in.h> |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 32 | #include <netdb.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 33 | |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 34 | #include <openssl/rand.h> |
| 35 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 36 | #include <openbsc/db.h> |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 37 | #include <osmocom/core/msgb.h> |
Harald Welte | 8b1713a | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 38 | #include <osmocom/gsm/tlv.h> |
| 39 | #include <osmocom/gsm/gsm_utils.h> |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 40 | #include <osmocom/core/signal.h> |
| 41 | #include <osmocom/core/talloc.h> |
| 42 | #include <osmocom/core/rate_ctr.h> |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 43 | #include <osmocom/gsm/apn.h> |
Harald Welte | 35ade5e | 2016-04-20 17:11:43 +0200 | [diff] [blame] | 44 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 45 | |
Harald Welte | cfb6b28 | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 46 | #include <osmocom/gprs/gprs_bssgp.h> |
| 47 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 48 | #include <openbsc/debug.h> |
| 49 | #include <openbsc/gsm_data.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 50 | #include <openbsc/gsm_subscriber.h> |
| 51 | #include <openbsc/gsm_04_08.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 52 | #include <openbsc/paging.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 53 | #include <openbsc/transaction.h> |
| 54 | #include <openbsc/gprs_llc.h> |
| 55 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 56 | #include <openbsc/gprs_gmm.h> |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 57 | #include <openbsc/gprs_utils.h> |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 58 | #include <openbsc/sgsn.h> |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 59 | #include <openbsc/signal.h> |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 60 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 61 | #include <pdp.h> |
| 62 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 63 | #define PTMSI_ALLOC |
| 64 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 65 | extern struct sgsn_instance *sgsn; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 66 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 67 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 68 | .def = { |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 69 | [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 70 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 71 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 72 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_FIXED, 3 }, |
| 73 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_FIXED, 16 }, |
| 74 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 75 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 76 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 77 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 78 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 79 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 80 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 81 | }, |
| 82 | }; |
| 83 | |
| 84 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 85 | .def = { |
| 86 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 87 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 88 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 89 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 90 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 91 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 92 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, |
| 93 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 94 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 95 | }, |
| 96 | }; |
| 97 | |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 98 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx); |
| 99 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 100 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 101 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 102 | static void mmctx_timer_cb(void *_mm); |
| 103 | |
| 104 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 105 | unsigned int seconds) |
| 106 | { |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 107 | if (osmo_timer_pending(&mm->timer)) |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 108 | LOGMMCTXP(LOGL_ERROR, mm, "Starting MM timer %u while old " |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 109 | "timer %u pending\n", T, mm->T); |
| 110 | mm->T = T; |
| 111 | mm->num_T_exp = 0; |
| 112 | |
| 113 | /* FIXME: we should do this only once ? */ |
| 114 | mm->timer.data = mm; |
| 115 | mm->timer.cb = &mmctx_timer_cb; |
| 116 | |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 117 | osmo_timer_schedule(&mm->timer, seconds, 0); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 121 | { |
| 122 | if (mm->T != T) |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 123 | LOGMMCTXP(LOGL_ERROR, mm, "Stopping MM timer %u but " |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 124 | "%u is running\n", T, mm->T); |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 125 | osmo_timer_del(&mm->timer); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 126 | } |
| 127 | |
Jacob Erlbeck | e6140d0 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 128 | time_t gprs_max_time_to_idle(void) |
| 129 | { |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 130 | return sgsn->cfg.timers.T3314 + (sgsn->cfg.timers.T3312 + 4 * 60); |
Jacob Erlbeck | e6140d0 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 131 | } |
| 132 | |
Neels Hofmeyr | 2a7ce0f | 2016-08-11 19:12:54 +0200 | [diff] [blame] | 133 | /* Send a message through the underlying layer. |
| 134 | * For param encryptable, see 3GPP TS 24.008 § 4.7.1.2 and |
| 135 | * gsm48_hdr_gmm_cipherable(). Pass false for not cipherable messages. */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 136 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 137 | struct sgsn_mm_ctx *mm, bool encryptable) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 138 | { |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 139 | if (mm) |
| 140 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
| 141 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 142 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 143 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm, encryptable); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 144 | } |
| 145 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 146 | /* copy identifiers from old message to new message, this |
| 147 | * is required so lower layers can route it correctly */ |
| 148 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 149 | { |
| 150 | msgb_tlli(msg) = msgb_tlli(old); |
| 151 | msgb_bvci(msg) = msgb_bvci(old); |
| 152 | msgb_nsei(msg) = msgb_nsei(old); |
| 153 | } |
| 154 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 155 | /* Store BVCI/NSEI in MM context */ |
| 156 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 157 | { |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 158 | mm->gb.bvci = msgb_bvci(msg); |
| 159 | mm->gb.nsei = msgb_nsei(msg); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | /* Store BVCI/NSEI in MM context */ |
| 163 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 164 | { |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 165 | msgb_tlli(msg) = mm->gb.tlli; |
| 166 | msgb_bvci(msg) = mm->gb.bvci; |
| 167 | msgb_nsei(msg) = mm->gb.nsei; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 168 | } |
| 169 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 170 | static void mm_ctx_cleanup_free(struct sgsn_mm_ctx *ctx, const char *log_text) |
| 171 | { |
Jacob Erlbeck | 70c177a | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 172 | LOGMMCTXP(LOGL_INFO, ctx, "Cleaning MM context due to %s\n", log_text); |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 173 | |
| 174 | /* Mark MM state as deregistered */ |
| 175 | ctx->mm_state = GMM_DEREGISTERED; |
| 176 | |
Jacob Erlbeck | 70c177a | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 177 | sgsn_mm_ctx_cleanup_free(ctx); |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 178 | } |
| 179 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 180 | /* Chapter 9.4.18 */ |
| 181 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 182 | struct sgsn_mm_ctx *mmctx, int sm) |
| 183 | { |
| 184 | struct gsm48_hdr *gh; |
| 185 | |
| 186 | /* MMCTX might be NULL! */ |
| 187 | |
| 188 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 189 | get_value_string(gsm48_gmm_cause_names, cause)); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 190 | |
| 191 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 192 | if (sm) { |
| 193 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 194 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 195 | } else { |
| 196 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 197 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 198 | } |
| 199 | gh->data[0] = cause; |
| 200 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 201 | return gsm48_gmm_sendmsg(msg, 0, mmctx, true); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 202 | } |
Jacob Erlbeck | ce61bb7 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 203 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 204 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 205 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 206 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 GMM STATUS"); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 207 | |
| 208 | mmctx2msgid(msg, mmctx); |
| 209 | return _tx_status(msg, cause, mmctx, 0); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 210 | } |
Jacob Erlbeck | ce61bb7 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 211 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 212 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 213 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 214 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SM STATUS"); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 215 | |
| 216 | mmctx2msgid(msg, mmctx); |
| 217 | return _tx_status(msg, cause, mmctx, 1); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 218 | } |
| 219 | |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 220 | static int _tx_detach_req(struct msgb *msg, uint8_t detach_type, uint8_t cause, |
| 221 | struct sgsn_mm_ctx *mmctx) |
| 222 | { |
| 223 | struct gsm48_hdr *gh; |
| 224 | |
| 225 | /* MMCTX might be NULL! */ |
| 226 | |
| 227 | DEBUGP(DMM, "<- GPRS MM DETACH REQ (type: %s, cause: %s)\n", |
| 228 | get_value_string(gprs_det_t_mt_strs, detach_type), |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 229 | get_value_string(gsm48_gmm_cause_names, cause)); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 230 | |
| 231 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 232 | |
| 233 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 234 | gh->msg_type = GSM48_MT_GMM_DETACH_REQ; |
| 235 | gh->data[0] = detach_type & 0x07; |
| 236 | |
| 237 | msgb_tv_put(msg, GSM48_IE_GMM_CAUSE, cause); |
| 238 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 239 | return gsm48_gmm_sendmsg(msg, 0, mmctx, true); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | static int gsm48_tx_gmm_detach_req(struct sgsn_mm_ctx *mmctx, |
| 243 | uint8_t detach_type, uint8_t cause) |
| 244 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 245 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET REQ"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 246 | |
| 247 | mmctx2msgid(msg, mmctx); |
| 248 | return _tx_detach_req(msg, detach_type, cause, mmctx); |
| 249 | } |
| 250 | |
| 251 | static int gsm48_tx_gmm_detach_req_oldmsg(struct msgb *oldmsg, |
| 252 | uint8_t detach_type, uint8_t cause) |
| 253 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 254 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET OLD"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 255 | |
| 256 | gmm_copy_id(msg, oldmsg); |
| 257 | return _tx_detach_req(msg, detach_type, cause, NULL); |
| 258 | } |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 259 | |
Harald Welte | 242d172 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 260 | static struct gsm48_qos default_qos = { |
| 261 | .delay_class = 4, /* best effort */ |
| 262 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 263 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 264 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 265 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 266 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 267 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 268 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 269 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 270 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 271 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 272 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 273 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 274 | .handling_prio = 3, |
| 275 | .xfer_delay = 0x10, /* 200ms */ |
| 276 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 277 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 278 | .sig_ind = 0, /* not optimised for signalling */ |
| 279 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 280 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 281 | }; |
| 282 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 283 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 284 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 285 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 286 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT ACK"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 287 | struct gsm48_hdr *gh; |
| 288 | struct gsm48_attach_ack *aa; |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 289 | uint8_t *mid; |
| 290 | #if 0 |
| 291 | uint8_t *ptsig; |
| 292 | #endif |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 293 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 294 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 295 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_ACKED]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 296 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 297 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 298 | |
| 299 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 300 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 301 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 302 | |
| 303 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 304 | aa->force_stby = 0; /* not indicated */ |
| 305 | aa->att_result = 1; /* GPRS only */ |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 306 | aa->ra_upd_timer = gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3312); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 307 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 308 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 309 | |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 310 | #if 0 |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 311 | /* Optional: P-TMSI signature */ |
| 312 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 313 | ptsig = msgb_put(msg, 3); |
| 314 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 315 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 316 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 317 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 318 | #endif |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 319 | /* Optional: Negotiated Ready timer value |
| 320 | * (fixed 44s, default value, GSM 04.08, table 11.4a) to safely limit |
| 321 | * the inactivity time READY->STANDBY. |
| 322 | */ |
| 323 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 324 | gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 325 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 326 | #ifdef PTMSI_ALLOC |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 327 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 328 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 329 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 330 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 331 | #endif |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 332 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 333 | /* Optional: MS-identity (combined attach) */ |
| 334 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 335 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 336 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 340 | static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause, |
| 341 | const struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 342 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 343 | struct gsm48_hdr *gh; |
| 344 | |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 345 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS ATTACH REJECT: %s\n", |
| 346 | get_value_string(gsm48_gmm_cause_names, gmm_cause)); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 347 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REJECTED]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 348 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 349 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 350 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 351 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 352 | gh->data[0] = gmm_cause; |
| 353 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 354 | return gsm48_gmm_sendmsg(msg, 0, NULL, false); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 355 | } |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 356 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 357 | uint8_t gmm_cause) |
| 358 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 359 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT REJ OLD"); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 360 | gmm_copy_id(msg, old_msg); |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 361 | return _tx_gmm_att_rej(msg, gmm_cause, NULL); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 362 | } |
| 363 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 364 | uint8_t gmm_cause) |
| 365 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 366 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT REJ"); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 367 | mmctx2msgid(msg, mm); |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 368 | return _tx_gmm_att_rej(msg, gmm_cause, mm); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 369 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 370 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 371 | /* Chapter 9.4.6.2 Detach accept */ |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 372 | static int _tx_detach_ack(struct msgb *msg, uint8_t force_stby, |
| 373 | struct sgsn_mm_ctx *mm) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 374 | { |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 375 | struct gsm48_hdr *gh; |
| 376 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 377 | /* MMCTX might be NULL! */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 378 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 379 | DEBUGP(DMM, "<- GPRS MM DETACH ACC (force-standby: %d)\n", force_stby); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 380 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_ACKED]); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 381 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 382 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 383 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 384 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 385 | gh->data[0] = force_stby; |
| 386 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 387 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 388 | } |
| 389 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 390 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
| 391 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 392 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACK"); |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 393 | |
| 394 | mmctx2msgid(msg, mm); |
| 395 | return _tx_detach_ack(msg, force_stby, mm); |
| 396 | } |
| 397 | |
| 398 | static int gsm48_tx_gmm_det_ack_oldmsg(struct msgb *oldmsg, uint8_t force_stby) |
| 399 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 400 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACK OLD"); |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 401 | |
| 402 | gmm_copy_id(msg, oldmsg); |
| 403 | return _tx_detach_ack(msg, force_stby, NULL); |
| 404 | } |
| 405 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 406 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 407 | static int gsm48_tx_gmm_id_req(struct sgsn_mm_ctx *mm, uint8_t id_type) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 408 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 409 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ID REQ"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 410 | struct gsm48_hdr *gh; |
| 411 | |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 412 | LOGMMCTXP(LOGL_DEBUG, mm, "<- GPRS IDENTITY REQUEST: mi_type=%s\n", |
| 413 | gsm48_mi_type_name(id_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 414 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 415 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 416 | |
| 417 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 418 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 419 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 420 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 421 | gh->data[0] = id_type & 0xf; |
| 422 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 423 | return gsm48_gmm_sendmsg(msg, 1, mm, false); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 424 | } |
| 425 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 426 | /* 3GPP TS 24.008 Section 9.4.9: Authentication and Ciphering Request */ |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 427 | static int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, uint8_t *rnd, |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 428 | uint8_t key_seq, bool force_standby) |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 429 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 430 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH CIPH REQ"); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 431 | struct gsm48_hdr *gh; |
| 432 | struct gsm48_auth_ciph_req *acreq; |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 433 | uint8_t *m_rand, *m_cksn, rbyte; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 434 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 435 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS AUTH AND CIPHERING REQ (rand = %s)\n", |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 436 | osmo_hexdump(rnd, 16)); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 437 | |
| 438 | mmctx2msgid(msg, mm); |
| 439 | |
| 440 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 441 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 442 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; |
| 443 | |
| 444 | acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 445 | acreq->ciph_alg = mm->ciph_algo & 0xf; |
| 446 | /* § 10.5.5.10: */ |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 447 | acreq->imeisv_req = 0x1; |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 448 | /* § 10.5.5.7: */ |
| 449 | acreq->force_stby = force_standby; |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 450 | /* 3GPP TS 24.008 § 10.5.5.19: */ |
| 451 | if (RAND_bytes(&rbyte, 1) != 1) { |
| 452 | LOGP(DMM, LOGL_NOTICE, "RAND_bytes failed for A&C ref, falling " |
| 453 | "back to rand()\n"); |
| 454 | acreq->ac_ref_nr = rand(); |
| 455 | } else |
| 456 | acreq->ac_ref_nr = rbyte; |
| 457 | mm->ac_ref_nr_used = acreq->ac_ref_nr; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 458 | |
| 459 | /* Only if authentication is requested we need to set RAND + CKSN */ |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 460 | if (rnd) { |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 461 | m_rand = msgb_put(msg, 16+1); |
| 462 | m_rand[0] = GSM48_IE_GMM_AUTH_RAND; |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 463 | memcpy(m_rand + 1, rnd, 16); |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 464 | /* § 10.5.1.2: */ |
Jacob Erlbeck | 79dcaa4 | 2014-12-01 10:36:17 +0100 | [diff] [blame] | 465 | m_cksn = msgb_put(msg, 1); |
| 466 | m_cksn[0] = (GSM48_IE_GMM_CIPH_CKSN << 4) | (key_seq & 0x07); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 467 | } |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 468 | /* FIXME: add AUTN for 3g auth according to 3GPP TS 24.008 § 10.5.3.1.1 */ |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 469 | /* FIXME: make sure we don't send any other messages to the MS */ |
| 470 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 471 | return gsm48_gmm_sendmsg(msg, 1, mm, false); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | /* Section 9.4.11: Authentication and Ciphering Reject */ |
| 475 | static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) |
| 476 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 477 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH CIPH REJ"); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 478 | struct gsm48_hdr *gh; |
| 479 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 480 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS AUTH AND CIPH REJECT\n"); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 481 | |
| 482 | mmctx2msgid(msg, mm); |
| 483 | |
| 484 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 485 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 486 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; |
| 487 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 488 | return gsm48_gmm_sendmsg(msg, 0, mm, false); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | /* Section 9.4.10: Authentication and Ciphering Response */ |
| 492 | static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, |
| 493 | struct msgb *msg) |
| 494 | { |
| 495 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 496 | struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; |
| 497 | struct tlv_parsed tp; |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 498 | struct gsm_auth_tuple *at; |
| 499 | int rc; |
| 500 | |
| 501 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH RESPONSE\n"); |
| 502 | |
| 503 | if (ctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 504 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 505 | "Unexpected Auth & Ciph Response (ignored)\n"); |
| 506 | return 0; |
| 507 | } |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 508 | |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 509 | if (acr->ac_ref_nr != ctx->ac_ref_nr_used) { |
| 510 | LOGMMCTXP(LOGL_NOTICE, ctx, "Reference mismatch for Auth & Ciph" |
| 511 | " Response: %u received, %u expected\n", |
| 512 | acr->ac_ref_nr, ctx->ac_ref_nr_used); |
| 513 | return 0; |
| 514 | } |
| 515 | |
Jacob Erlbeck | 4d12767 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 516 | /* Stop T3360 */ |
| 517 | mmctx_timer_stop(ctx, 3360); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 518 | |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 519 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 520 | (msg->data + msg->len) - acr->data, 0, 0); |
| 521 | |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 522 | if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || |
| 523 | !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV)) { |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 524 | /* TODO: missing mandatory IE, return STATUS or REJ? */ |
| 525 | LOGMMCTXP(LOGL_ERROR, ctx, "Missing mandantory IE\n"); |
| 526 | return -EINVAL; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 527 | } |
| 528 | |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 529 | /* Compare SRES with what we expected */ |
| 530 | LOGMMCTXP(LOGL_DEBUG, ctx, "checking received auth info, SRES = %s\n", |
| 531 | osmo_hexdump(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), |
| 532 | TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES))); |
| 533 | |
| 534 | at = &ctx->auth_triplet; |
| 535 | |
Harald Welte | 34ef4c5 | 2016-04-20 13:13:19 +0200 | [diff] [blame] | 536 | if (TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES) != sizeof(at->vec.sres) || |
| 537 | memcmp(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), at->vec.sres, |
| 538 | sizeof(at->vec.sres)) != 0) { |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 539 | |
| 540 | LOGMMCTXP(LOGL_NOTICE, ctx, "Received SRES doesn't match\n"); |
| 541 | rc = gsm48_tx_gmm_auth_ciph_rej(ctx); |
| 542 | mm_ctx_cleanup_free(ctx, "GPRS AUTH AND CIPH REJECT"); |
| 543 | return rc; |
| 544 | } |
| 545 | |
| 546 | ctx->is_authenticated = 1; |
| 547 | |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 548 | /* FIXME: enable LLC cipheirng */ |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 549 | |
| 550 | /* Check if we can let the mobile station enter */ |
| 551 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 552 | } |
| 553 | |
Holger Hans Peter Freyther | a9f671c | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 554 | static void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx) |
| 555 | { |
| 556 | struct gsm_mncc_number called; |
| 557 | uint8_t msisdn[sizeof(ctx->subscr->sgsn_data->msisdn) + 1]; |
| 558 | |
| 559 | /* Convert MSISDN from encoded to string.. */ |
| 560 | if (!ctx->subscr) |
| 561 | return; |
| 562 | |
| 563 | if (ctx->subscr->sgsn_data->msisdn_len < 1) |
| 564 | return; |
| 565 | |
| 566 | /* prepare the data for the decoder */ |
| 567 | memset(&called, 0, sizeof(called)); |
| 568 | msisdn[0] = ctx->subscr->sgsn_data->msisdn_len; |
| 569 | memcpy(&msisdn[1], ctx->subscr->sgsn_data->msisdn, |
| 570 | ctx->subscr->sgsn_data->msisdn_len); |
| 571 | |
| 572 | /* decode the string now */ |
| 573 | gsm48_decode_called(&called, msisdn); |
| 574 | |
| 575 | /* Prepend a '+' for international numbers */ |
| 576 | if (called.plan == 1 && called.type == 1) { |
| 577 | ctx->msisdn[0] = '+'; |
| 578 | strncpy(&ctx->msisdn[1], called.number, |
| 579 | sizeof(ctx->msisdn) - 1); |
| 580 | } else { |
| 581 | strncpy(&ctx->msisdn[0], called.number, |
| 582 | sizeof(ctx->msisdn) - 1); |
| 583 | } |
| 584 | } |
| 585 | |
Holger Hans Peter Freyther | 8b2b5fb | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 586 | static void extract_subscr_hlr(struct sgsn_mm_ctx *ctx) |
| 587 | { |
| 588 | struct gsm_mncc_number called; |
| 589 | uint8_t hlr_number[sizeof(ctx->subscr->sgsn_data->hlr) + 1]; |
| 590 | |
| 591 | if (!ctx->subscr) |
| 592 | return; |
| 593 | |
| 594 | if (ctx->subscr->sgsn_data->hlr_len < 1) |
| 595 | return; |
| 596 | |
| 597 | /* prepare the data for the decoder */ |
| 598 | memset(&called, 0, sizeof(called)); |
| 599 | hlr_number[0] = ctx->subscr->sgsn_data->hlr_len; |
| 600 | memcpy(&hlr_number[1], ctx->subscr->sgsn_data->hlr, |
| 601 | ctx->subscr->sgsn_data->hlr_len); |
| 602 | |
| 603 | /* decode the string now */ |
| 604 | gsm48_decode_called(&called, hlr_number); |
| 605 | |
| 606 | if (called.plan != 1) { |
| 607 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 608 | "Numbering plan(%d) not allowed\n", |
| 609 | called.plan); |
| 610 | return; |
| 611 | } |
| 612 | |
| 613 | if (called.type != 1) { |
| 614 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 615 | "Numbering type(%d) not allowed\n", |
| 616 | called.type); |
| 617 | return; |
| 618 | } |
| 619 | |
| 620 | strncpy(&ctx->hlr[0], called.number, sizeof(ctx->hlr) - 1); |
| 621 | } |
| 622 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 623 | /* Check if we can already authorize a subscriber */ |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 624 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 625 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 626 | #ifndef PTMSI_ALLOC |
| 627 | struct sgsn_signal_data sig_data; |
| 628 | #endif |
| 629 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 630 | /* Request IMSI and IMEI from the MS if they are unknown */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 631 | if (!strlen(ctx->imei)) { |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 632 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 633 | mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 634 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 635 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 636 | if (!strlen(ctx->imsi)) { |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 637 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 638 | mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 639 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 640 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 641 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 642 | /* All information required for authentication is available */ |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 643 | ctx->t3370_id_type = GSM_MI_TYPE_NONE; |
| 644 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 645 | if (ctx->auth_state == SGSN_AUTH_UNKNOWN) { |
| 646 | /* Request authorization, this leads to a call to |
Jacob Erlbeck | 802d78a | 2014-11-07 14:17:44 +0100 | [diff] [blame] | 647 | * sgsn_auth_update which in turn calls |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 648 | * gsm0408_gprs_access_granted or gsm0408_gprs_access_denied */ |
| 649 | |
Jacob Erlbeck | b2acd74 | 2014-11-13 10:48:39 +0100 | [diff] [blame] | 650 | sgsn_auth_request(ctx); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 651 | /* Note that gsm48_gmm_authorize can be called recursively via |
| 652 | * sgsn_auth_request iff ctx->auth_info changes to AUTH_ACCEPTED |
| 653 | */ |
| 654 | return 0; |
| 655 | } |
| 656 | |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 657 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && !ctx->is_authenticated) { |
| 658 | struct gsm_auth_tuple *at = &ctx->auth_triplet; |
| 659 | |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 660 | mmctx_timer_start(ctx, 3360, sgsn->cfg.timers.T3360); |
Harald Welte | 34ef4c5 | 2016-04-20 13:13:19 +0200 | [diff] [blame] | 661 | return gsm48_tx_gmm_auth_ciph_req(ctx, at->vec.rand, |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 662 | at->key_seq, false); |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 663 | } |
| 664 | |
| 665 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && ctx->is_authenticated && |
| 666 | ctx->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { |
| 667 | /* Check again for authorization */ |
| 668 | sgsn_auth_request(ctx); |
| 669 | return 0; |
| 670 | } |
| 671 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 672 | if (ctx->auth_state != SGSN_AUTH_ACCEPTED) { |
| 673 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 674 | "authorization is denied, aborting procedure\n"); |
| 675 | return -EACCES; |
Jacob Erlbeck | 79d438a | 2014-10-29 22:12:20 +0100 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | /* The MS is authorized */ |
| 679 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 680 | switch (ctx->pending_req) { |
| 681 | case 0: |
| 682 | LOGMMCTXP(LOGL_INFO, ctx, |
| 683 | "no pending request, authorization completed\n"); |
| 684 | break; |
| 685 | case GSM48_MT_GMM_ATTACH_REQ: |
Holger Hans Peter Freyther | a9f671c | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 686 | |
| 687 | extract_subscr_msisdn(ctx); |
Holger Hans Peter Freyther | 8b2b5fb | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 688 | extract_subscr_hlr(ctx); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 689 | #ifdef PTMSI_ALLOC |
| 690 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 691 | mmctx_timer_start(ctx, 3350, sgsn->cfg.timers.T3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 692 | ctx->t3350_mode = GMM_T3350_MODE_ATT; |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 693 | #else |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 694 | memset(&sig_data, 0, sizeof(sig_data)); |
| 695 | sig_data.mm = mmctx; |
| 696 | osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 697 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 698 | #endif |
| 699 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 700 | return gsm48_tx_gmm_att_ack(ctx); |
| 701 | default: |
| 702 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 703 | "only Attach Request is supported yet, " |
| 704 | "got request type %u\n", ctx->pending_req); |
| 705 | break; |
| 706 | } |
| 707 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 708 | return 0; |
| 709 | } |
| 710 | |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 711 | void gsm0408_gprs_authenticate(struct sgsn_mm_ctx *ctx) |
| 712 | { |
| 713 | ctx->is_authenticated = 0; |
| 714 | |
| 715 | gsm48_gmm_authorize(ctx); |
| 716 | } |
| 717 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 718 | void gsm0408_gprs_access_granted(struct sgsn_mm_ctx *ctx) |
| 719 | { |
| 720 | switch (ctx->mm_state) { |
| 721 | case GMM_COMMON_PROC_INIT: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 722 | LOGMMCTXP(LOGL_NOTICE, ctx, |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 723 | "Authorized, continuing procedure, IMSI=%s\n", |
| 724 | ctx->imsi); |
| 725 | /* Continue with the authorization */ |
| 726 | gsm48_gmm_authorize(ctx); |
| 727 | break; |
| 728 | default: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 729 | LOGMMCTXP(LOGL_INFO, ctx, |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 730 | "Authorized, ignored, IMSI=%s\n", |
| 731 | ctx->imsi); |
| 732 | } |
| 733 | } |
| 734 | |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 735 | void gsm0408_gprs_access_denied(struct sgsn_mm_ctx *ctx, int gmm_cause) |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 736 | { |
Jacob Erlbeck | f96779f | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 737 | if (gmm_cause == SGSN_ERROR_CAUSE_NONE) |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 738 | gmm_cause = GMM_CAUSE_GPRS_NOTALLOWED; |
| 739 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 740 | switch (ctx->mm_state) { |
| 741 | case GMM_COMMON_PROC_INIT: |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 742 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 743 | "Not authorized, rejecting ATTACH REQUEST " |
| 744 | "with cause '%s' (%d)\n", |
| 745 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 746 | gmm_cause); |
| 747 | gsm48_tx_gmm_att_rej(ctx, gmm_cause); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 748 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJECT"); |
| 749 | break; |
| 750 | case GMM_REGISTERED_NORMAL: |
| 751 | case GMM_REGISTERED_SUSPENDED: |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 752 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 753 | "Authorization lost, detaching " |
| 754 | "with cause '%s' (%d)\n", |
| 755 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 756 | gmm_cause); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 757 | gsm48_tx_gmm_detach_req( |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 758 | ctx, GPRS_DET_T_MT_REATT_NOTREQ, gmm_cause); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 759 | |
| 760 | mm_ctx_cleanup_free(ctx, "auth lost"); |
| 761 | break; |
| 762 | default: |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 763 | LOGMMCTXP(LOGL_INFO, ctx, |
| 764 | "Authorization lost, cause is '%s' (%d)\n", |
| 765 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 766 | gmm_cause); |
| 767 | mm_ctx_cleanup_free(ctx, "auth lost"); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 768 | } |
| 769 | } |
| 770 | |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 771 | void gsm0408_gprs_access_cancelled(struct sgsn_mm_ctx *ctx, int gmm_cause) |
Jacob Erlbeck | bf0b874 | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 772 | { |
Jacob Erlbeck | f96779f | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 773 | if (gmm_cause != SGSN_ERROR_CAUSE_NONE) { |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 774 | LOGMMCTXP(LOGL_INFO, ctx, |
| 775 | "Cancelled with cause '%s' (%d), deleting context\n", |
| 776 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 777 | gmm_cause); |
| 778 | gsm0408_gprs_access_denied(ctx, gmm_cause); |
| 779 | return; |
Jacob Erlbeck | bf0b874 | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 780 | } |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 781 | |
| 782 | LOGMMCTXP(LOGL_INFO, ctx, "Cancelled, deleting context silently\n"); |
Jacob Erlbeck | bf0b874 | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 783 | mm_ctx_cleanup_free(ctx, "access cancelled"); |
| 784 | } |
| 785 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 786 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 787 | static int gsm48_rx_gmm_id_resp(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 788 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 789 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 790 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 791 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 792 | |
| 793 | gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 794 | if (!ctx) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 795 | DEBUGP(DMM, "from unknown TLLI 0x%08x?!? This should not happen\n", msgb_tlli(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 796 | return -EINVAL; |
| 797 | } |
| 798 | |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 799 | LOGMMCTXP(LOGL_DEBUG, ctx, "-> GMM IDENTITY RESPONSE: MI(%s)=%s\n", |
| 800 | gsm48_mi_type_name(mi_type), mi_string); |
Daniel Willmann | 09827d5 | 2014-09-23 18:48:44 +0200 | [diff] [blame] | 801 | |
Jacob Erlbeck | 5233c0c | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 802 | if (ctx->t3370_id_type == GSM_MI_TYPE_NONE) { |
| 803 | LOGMMCTXP(LOGL_NOTICE, ctx, |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 804 | "Got unexpected IDENTITY RESPONSE: MI(%s)=%s, " |
Jacob Erlbeck | 5233c0c | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 805 | "ignoring message\n", |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 806 | gsm48_mi_type_name(mi_type), mi_string); |
Jacob Erlbeck | 5233c0c | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 807 | return -EINVAL; |
| 808 | } |
| 809 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 810 | if (mi_type == ctx->t3370_id_type) |
| 811 | mmctx_timer_stop(ctx, 3370); |
| 812 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 813 | switch (mi_type) { |
| 814 | case GSM_MI_TYPE_IMSI: |
| 815 | /* we already have a mm context with current TLLI, but no |
| 816 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 817 | * this initial context with data from the HLR */ |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 818 | if (strlen(ctx->imsi) == 0) { |
| 819 | /* Check if we already have a MM context for this IMSI */ |
| 820 | struct sgsn_mm_ctx *ictx; |
| 821 | ictx = sgsn_mm_ctx_by_imsi(mi_string); |
| 822 | if (ictx) { |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 823 | /* Handle it like in gsm48_rx_gmm_det_req, |
| 824 | * except that no messages are sent to the BSS */ |
| 825 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 826 | LOGMMCTXP(LOGL_NOTICE, ctx, "Deleting old MM Context for same IMSI " |
| 827 | "p_tmsi_old=0x%08x\n", |
| 828 | ictx->p_tmsi); |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 829 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 830 | mm_ctx_cleanup_free(ictx, "GPRS IMSI re-use"); |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 831 | } |
| 832 | } |
Jacob Erlbeck | b485ee9 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 833 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi) - 1); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 834 | break; |
| 835 | case GSM_MI_TYPE_IMEI: |
Jacob Erlbeck | b485ee9 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 836 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei) - 1); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 837 | break; |
| 838 | case GSM_MI_TYPE_IMEISV: |
| 839 | break; |
| 840 | } |
| 841 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 842 | /* Check if we can let the mobile station enter */ |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 843 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 844 | } |
| 845 | |
| 846 | /* Section 9.4.1 Attach request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 847 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 848 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 849 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 850 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 851 | uint8_t *cur = gh->data, *msnc, *mi, *ms_ra_acc_cap; |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 852 | uint8_t msnc_len, att_type, mi_len, mi_type, ms_ra_acc_cap_len; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 853 | uint16_t drx_par; |
| 854 | uint32_t tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 855 | char mi_string[GSM48_MI_SIZE]; |
| 856 | struct gprs_ra_id ra_id; |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 857 | uint16_t cid; |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 858 | enum gsm48_gmm_cause reject_cause; |
| 859 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 860 | |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 861 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM ATTACH REQUEST "); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 862 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REQUEST]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 863 | |
| 864 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 865 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 866 | * or with random TLLI. */ |
| 867 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 868 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 869 | |
| 870 | /* MS network capability 10.5.5.12 */ |
| 871 | msnc_len = *cur++; |
| 872 | msnc = cur; |
Alexander Chemeris | 6824c50 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 873 | if (msnc_len > sizeof(ctx->ms_network_capa.buf)) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 874 | goto err_inval; |
| 875 | cur += msnc_len; |
| 876 | |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame^] | 877 | /* TODO: In iu mode - handle follow-on request */ |
| 878 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 879 | /* aTTACH Type 10.5.5.2 */ |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame^] | 880 | att_type = *cur++ & 0x07; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 881 | |
| 882 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 883 | drx_par = *cur++ << 8; |
| 884 | drx_par |= *cur++; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 885 | |
| 886 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 887 | mi_len = *cur++; |
| 888 | mi = cur; |
| 889 | if (mi_len > 8) |
| 890 | goto err_inval; |
| 891 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 892 | cur += mi_len; |
| 893 | |
| 894 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 895 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 896 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 897 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 898 | |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 899 | /* Old routing area identification 10.5.5.15. Skip it */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 900 | cur += 6; |
| 901 | |
| 902 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 903 | ms_ra_acc_cap_len = *cur++; |
| 904 | ms_ra_acc_cap = cur; |
Alexander Chemeris | 6824c50 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 905 | if (ms_ra_acc_cap_len > sizeof(ctx->ms_radio_access_capa.buf)) |
Harald Welte | abe0613 | 2010-07-03 21:20:06 +0200 | [diff] [blame] | 906 | goto err_inval; |
Harald Welte | 45ca552 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 907 | cur += ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 908 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 909 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 910 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 911 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 912 | |
| 913 | switch (mi_type) { |
| 914 | case GSM_MI_TYPE_IMSI: |
| 915 | /* Try to find MM context based on IMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 916 | if (!ctx) |
| 917 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 918 | if (!ctx) { |
| 919 | #if 0 |
| 920 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 921 | #else |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 922 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 923 | if (!ctx) { |
| 924 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 925 | goto rejected; |
| 926 | } |
Jacob Erlbeck | b485ee9 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 927 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi) - 1); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 928 | #endif |
| 929 | } |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 930 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 931 | ctx->gb.tlli = msgb_tlli(msg); |
| 932 | ctx->gb.llme = llme; |
| 933 | } |
Harald Welte | 5c23bfc | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 934 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 935 | break; |
| 936 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 937 | memcpy(&tmsi, mi+1, 4); |
| 938 | tmsi = ntohl(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 939 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 940 | if (!ctx) |
| 941 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 942 | if (!ctx) { |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 943 | /* Allocate a context as most of our code expects one. |
| 944 | * Context will not have an IMSI ultil ID RESP is received */ |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 945 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 946 | ctx->p_tmsi = tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 947 | } |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 948 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 949 | ctx->gb.tlli = msgb_tlli(msg); |
| 950 | ctx->gb.llme = llme; |
| 951 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 952 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 953 | break; |
| 954 | default: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 955 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with " |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 956 | "MI type %s\n", gsm48_mi_type_name(mi_type)); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 957 | reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; |
| 958 | goto rejected; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 959 | } |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 960 | /* Update MM Context with currient RA and Cell ID */ |
| 961 | ctx->ra = ra_id; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 962 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) |
| 963 | ctx->gb.cell_id = cid; |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 964 | /* Update MM Context with other data */ |
| 965 | ctx->drx_parms = drx_par; |
Alexander Chemeris | 6824c50 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 966 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
Harald Welte | 45ca552 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 967 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, |
| 968 | ctx->ms_radio_access_capa.len); |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 969 | ctx->ms_network_capa.len = msnc_len; |
| 970 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 971 | if (!gprs_ms_net_cap_gea_supported(ctx->ms_network_capa.buf, msnc_len, |
| 972 | ctx->ciph_algo)) { |
| 973 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 974 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with MI " |
| 975 | "type %s because MS do not support required %s " |
| 976 | "encryption\n", gsm48_mi_type_name(mi_type), |
| 977 | get_value_string(gprs_cipher_names,ctx->ciph_algo)); |
| 978 | goto rejected; |
| 979 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 980 | #ifdef PTMSI_ALLOC |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 981 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Jacob Erlbeck | e06476a | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 982 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 983 | if (ctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 984 | ctx->p_tmsi_old = ctx->p_tmsi; |
| 985 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 986 | } |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 987 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 988 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 989 | |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 990 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 991 | /* Even if there is no P-TMSI allocated, the MS will |
| 992 | * switch from foreign TLLI to local TLLI */ |
| 993 | ctx->gb.tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 994 | |
| 995 | /* Inform LLC layer about new TLLI but keep old active */ |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 996 | if (ctx->is_authenticated) |
| 997 | gprs_llme_copy_key(ctx, ctx->gb.llme); |
| 998 | |
| 999 | gprs_llgmm_assign(ctx->gb.llme, ctx->gb.tlli, ctx->gb.tlli_new); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1000 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1001 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1002 | ctx->pending_req = GSM48_MT_GMM_ATTACH_REQ; |
| 1003 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1004 | |
| 1005 | err_inval: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1006 | LOGPC(DMM, LOGL_INFO, "\n"); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1007 | reject_cause = GMM_CAUSE_SEM_INCORR_MSG; |
| 1008 | |
| 1009 | rejected: |
| 1010 | /* Send ATTACH REJECT */ |
| 1011 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1012 | "Rejecting Attach Request with cause '%s' (%d)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1013 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1014 | rc = gsm48_tx_gmm_att_rej_oldmsg(msg, reject_cause); |
| 1015 | if (ctx) |
| 1016 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJ"); |
| 1017 | else |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1018 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1019 | |
| 1020 | return rc; |
| 1021 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1022 | } |
| 1023 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1024 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1025 | static int gsm48_rx_gmm_det_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1026 | { |
| 1027 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1028 | uint8_t detach_type, power_off; |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1029 | int rc = 0; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1030 | |
| 1031 | detach_type = gh->data[0] & 0x7; |
| 1032 | power_off = gh->data[0] & 0x8; |
| 1033 | |
| 1034 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1035 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_REQUEST]); |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1036 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1037 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 1038 | power_off ? "Power-off" : ""); |
| 1039 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1040 | /* Only send the Detach Accept (MO) if power off isn't indicated, |
Jacob Erlbeck | 97ee376 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1041 | * see 04.08, 4.7.4.1.2/3 for details */ |
| 1042 | if (!power_off) { |
| 1043 | /* force_stby = 0 */ |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1044 | if (ctx) |
| 1045 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 1046 | else |
| 1047 | rc = gsm48_tx_gmm_det_ack_oldmsg(msg, 0); |
Jacob Erlbeck | 97ee376 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1048 | } |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1049 | |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1050 | if (ctx) { |
| 1051 | struct sgsn_signal_data sig_data; |
| 1052 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1053 | sig_data.mm = ctx; |
| 1054 | osmo_signal_dispatch(SS_SGSN, S_SGSN_DETACH, &sig_data); |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1055 | mm_ctx_cleanup_free(ctx, "GPRS DETACH REQUEST"); |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1056 | } |
Jacob Erlbeck | 12396bd | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 1057 | |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1058 | return rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1059 | } |
| 1060 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1061 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1062 | static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1063 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1064 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 UPD ACK"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1065 | struct gsm48_hdr *gh; |
| 1066 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1067 | uint8_t *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1068 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1069 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_ACKED]); |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1070 | LOGMMCTXP(LOGL_INFO, mm, "<- ROUTING AREA UPDATE ACCEPT\n"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1071 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1072 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1073 | |
| 1074 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1075 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1076 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 1077 | |
| 1078 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 1079 | rua->force_stby = 0; /* not indicated */ |
| 1080 | rua->upd_result = 0; /* RA updated */ |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1081 | rua->ra_upd_timer = gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3312); |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1082 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1083 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1084 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1085 | #if 0 |
| 1086 | /* Optional: P-TMSI signature */ |
| 1087 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 1088 | ptsig = msgb_put(msg, 3); |
| 1089 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 1090 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 1091 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 1092 | #endif |
| 1093 | |
| 1094 | #ifdef PTMSI_ALLOC |
| 1095 | /* Optional: Allocated P-TMSI */ |
| 1096 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 1097 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 1098 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 1099 | #endif |
| 1100 | |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 1101 | /* Optional: Negotiated READY timer value */ |
| 1102 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1103 | gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 1104 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1105 | /* Option: MS ID, ... */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1106 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1107 | } |
| 1108 | |
| 1109 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1110 | static int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1111 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1112 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 RA UPD REJ"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1113 | struct gsm48_hdr *gh; |
| 1114 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1115 | LOGP(DMM, LOGL_NOTICE, "<- ROUTING AREA UPDATE REJECT\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1116 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REJECT]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1117 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1118 | gmm_copy_id(msg, old_msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1119 | |
| 1120 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 1121 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1122 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 1123 | gh->data[0] = cause; |
| 1124 | gh->data[1] = 0; /* ? */ |
| 1125 | |
| 1126 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1127 | return gsm48_gmm_sendmsg(msg, 0, NULL, false); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1128 | } |
| 1129 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1130 | static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1131 | const uint8_t *pdp_status) |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1132 | { |
| 1133 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 1134 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 1135 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 1136 | * shall deactivate all those PDP contexts locally (without peer to |
| 1137 | * peer signalling between the MS and the network), which are not in SM |
| 1138 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 1139 | * being in state PDP-INACTIVE. */ |
| 1140 | |
| 1141 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
Harald Welte | 9e7093c | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1142 | if (pdp->nsapi < 8) { |
| 1143 | if (!(pdp_status[0] & (1 << pdp->nsapi))) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1144 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | 9e7093c | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1145 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1146 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1147 | sgsn_delete_pdp_ctx(pdp); |
| 1148 | } |
| 1149 | } else { |
| 1150 | if (!(pdp_status[1] & (1 << (pdp->nsapi - 8)))) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1151 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | 9e7093c | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1152 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1153 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1154 | sgsn_delete_pdp_ctx(pdp); |
| 1155 | } |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1156 | } |
| 1157 | } |
| 1158 | } |
| 1159 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1160 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1161 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1162 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1163 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1164 | #ifndef PTMSI_ALLOC |
| 1165 | struct sgsn_signal_data sig_data; |
| 1166 | #endif |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1167 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1168 | uint8_t *cur = gh->data; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1169 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1170 | struct gprs_ra_id old_ra_id; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1171 | struct tlv_parsed tp; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1172 | uint8_t upd_type; |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1173 | enum gsm48_gmm_cause reject_cause; |
| 1174 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1175 | |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame^] | 1176 | /* TODO: In iu mode - handle follow-on request */ |
| 1177 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1178 | /* Update Type 10.5.5.18 */ |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame^] | 1179 | upd_type = *cur++ & 0x07; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1180 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1181 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REQUEST]); |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1182 | LOGP(DMM, LOGL_INFO, "-> GMM RA UPDATE REQUEST type=\"%s\"\n", |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1183 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1184 | |
| 1185 | /* Old routing area identification 10.5.5.15 */ |
| 1186 | gsm48_parse_ra(&old_ra_id, cur); |
| 1187 | cur += 6; |
| 1188 | |
| 1189 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1190 | ms_ra_acc_cap_len = *cur++; |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1191 | if (ms_ra_acc_cap_len > 52) { |
| 1192 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1193 | goto rejected; |
| 1194 | } |
Harald Welte | 45ca552 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1195 | cur += ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1196 | |
| 1197 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 1198 | * DRX parameter, MS network capability */ |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1199 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1200 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1201 | |
| 1202 | switch (upd_type) { |
| 1203 | case GPRS_UPD_T_RA_LA: |
| 1204 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1205 | LOGP(DMM, LOGL_NOTICE, "Update type %i unsupported in Mode III, is your SI13 corrupt?\n", upd_type); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1206 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1207 | goto rejected; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1208 | case GPRS_UPD_T_RA: |
| 1209 | case GPRS_UPD_T_PERIODIC: |
| 1210 | break; |
| 1211 | } |
| 1212 | |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1213 | if (!mmctx) { |
| 1214 | /* BSSGP doesn't give us an mmctx */ |
| 1215 | |
| 1216 | /* TODO: Check if there is an MM CTX with old_ra_id and |
| 1217 | * the P-TMSI (if given, reguired for UMTS) or as last resort |
| 1218 | * if the TLLI matches foreign_tlli (P-TMSI). Note that this |
| 1219 | * is an optimization to avoid the RA reject (impl detached) |
| 1220 | * below, which will cause a new attach cycle. */ |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1221 | /* Look-up the MM context based on old RA-ID and TLLI */ |
| 1222 | mmctx = sgsn_mm_ctx_by_tlli_and_ptmsi(msgb_tlli(msg), &old_ra_id); |
| 1223 | if (mmctx) { |
| 1224 | LOGMMCTXP(LOGL_INFO, mmctx, |
| 1225 | "Looked up by matching TLLI and P_TMSI. " |
| 1226 | "BSSGP TLLI: %08x, P-TMSI: %08x (%08x), " |
| 1227 | "TLLI: %08x (%08x), RA: %d-%d-%d-%d\n", |
| 1228 | msgb_tlli(msg), |
| 1229 | mmctx->p_tmsi, mmctx->p_tmsi_old, |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 1230 | mmctx->gb.tlli, mmctx->gb.tlli_new, |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1231 | mmctx->ra.mcc, mmctx->ra.mnc, |
| 1232 | mmctx->ra.lac, mmctx->ra.rac); |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1233 | |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1234 | mmctx->mm_state = GMM_COMMON_PROC_INIT; |
| 1235 | } |
| 1236 | } else if (!gprs_ra_id_equals(&mmctx->ra, &old_ra_id) || |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1237 | mmctx->mm_state == GMM_DEREGISTERED) |
| 1238 | { |
| 1239 | /* We cannot use the mmctx */ |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1240 | LOGMMCTXP(LOGL_INFO, mmctx, |
| 1241 | "The MM context cannot be used, RA: %d-%d-%d-%d\n", |
| 1242 | mmctx->ra.mcc, mmctx->ra.mnc, |
| 1243 | mmctx->ra.lac, mmctx->ra.rac); |
| 1244 | mmctx = NULL; |
| 1245 | } |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1246 | |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1247 | if (!mmctx) { |
Harald Welte | 95de4d5 | 2015-12-25 22:31:36 +0100 | [diff] [blame] | 1248 | if (llme) { |
| 1249 | /* send a XID reset to re-set all LLC sequence numbers |
| 1250 | * in the MS */ |
| 1251 | LOGMMCTXP(LOGL_NOTICE, mmctx, "LLC XID RESET\n"); |
| 1252 | gprs_llgmm_reset(llme); |
| 1253 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1254 | /* The MS has to perform GPRS attach */ |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1255 | /* Device is still IMSI attached for CS but initiate GPRS ATTACH, |
| 1256 | * see GSM 04.08, 4.7.5.1.4 and G.6 */ |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1257 | reject_cause = GMM_CAUSE_IMPL_DETACHED; |
| 1258 | goto rejected; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1259 | } |
| 1260 | |
Harald Welte | 66d062a | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 1261 | /* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */ |
| 1262 | msgid2mmctx(mmctx, msg); |
| 1263 | /* Bump the statistics of received signalling msgs for this MM context */ |
| 1264 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 1265 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1266 | /* Update the MM context with the new RA-ID */ |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1267 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
Daniel Willmann | 711adc2 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 1268 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1269 | /* Update the MM context with the new (i.e. foreign) TLLI */ |
| 1270 | mmctx->gb.tlli = msgb_tlli(msg); |
| 1271 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1272 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 1273 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 1274 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1275 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 1276 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1277 | #ifdef PTMSI_ALLOC |
Jacob Erlbeck | e06476a | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 1278 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 1279 | if (mmctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 1280 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 1281 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 1282 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1283 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 1284 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1285 | mmctx_timer_start(mmctx, 3350, sgsn->cfg.timers.T3350); |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1286 | |
| 1287 | mmctx->mm_state = GMM_COMMON_PROC_INIT; |
| 1288 | #else |
| 1289 | /* Make sure we are NORMAL (i.e. not SUSPENDED anymore) */ |
| 1290 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1291 | |
| 1292 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1293 | sig_data.mm = mmctx; |
| 1294 | osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1295 | #endif |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1296 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1297 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 1298 | * foreign TLLI to local TLLI */ |
| 1299 | mmctx->gb.tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1300 | |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1301 | /* Inform LLC layer about new TLLI but keep old active */ |
| 1302 | gprs_llgmm_assign(mmctx->gb.llme, mmctx->gb.tlli, |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1303 | mmctx->gb.tlli_new); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1304 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1305 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1306 | /* Look at PDP Context Status IE and see if MS's view of |
| 1307 | * activated/deactivated NSAPIs agrees with our view */ |
| 1308 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1309 | const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1310 | process_ms_ctx_status(mmctx, pdp_status); |
| 1311 | } |
| 1312 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1313 | /* Send RA UPDATE ACCEPT */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1314 | return gsm48_tx_gmm_ra_upd_ack(mmctx); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1315 | |
| 1316 | rejected: |
| 1317 | /* Send RA UPDATE REJECT */ |
| 1318 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 1319 | "Rejecting RA Update Request with cause '%s' (%d)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1320 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1321 | rc = gsm48_tx_gmm_ra_upd_rej(msg, reject_cause); |
| 1322 | if (mmctx) |
| 1323 | mm_ctx_cleanup_free(mmctx, "GPRS RA UPDATE REJ"); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1324 | else { |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1325 | if (llme) |
| 1326 | gprs_llgmm_unassign(llme); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1327 | } |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1328 | |
| 1329 | return rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1330 | } |
| 1331 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1332 | static int gsm48_rx_gmm_status(struct sgsn_mm_ctx *mmctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1333 | { |
| 1334 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1335 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1336 | LOGMMCTXP(LOGL_INFO, mmctx, "-> GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1337 | get_value_string(gsm48_gmm_cause_names, gh->data[0])); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1338 | |
| 1339 | return 0; |
| 1340 | } |
| 1341 | |
| 1342 | /* GPRS Mobility Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1343 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1344 | struct gprs_llc_llme *llme, bool drop_cipherable) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1345 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1346 | struct sgsn_signal_data sig_data; |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1347 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1348 | int rc; |
| 1349 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1350 | /* MMCTX can be NULL when called */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1351 | if (drop_cipherable && gsm48_hdr_gmm_cipherable(gh)) { |
| 1352 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping cleartext GMM %s which " |
| 1353 | "is expected to be encrypted for TLLI 0x%08x\n", |
| 1354 | get_value_string(gprs_msgt_gmm_names, gh->msg_type), |
| 1355 | llme->tlli); |
| 1356 | return -EBADMSG; |
| 1357 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1358 | |
Harald Welte | 95de4d5 | 2015-12-25 22:31:36 +0100 | [diff] [blame] | 1359 | if (llme && !mmctx && |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1360 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1361 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1362 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1363 | /* 4.7.10 */ |
Jacob Erlbeck | b35ee6b | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1364 | if (gh->msg_type == GSM48_MT_GMM_STATUS) { |
| 1365 | /* TLLI unassignment */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1366 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1367 | return 0; |
Jacob Erlbeck | b35ee6b | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1368 | } |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1369 | |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1370 | /* Don't reply or establish a LLME on DETACH_ACK */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1371 | if (gh->msg_type == GSM48_MT_GMM_DETACH_ACK) |
| 1372 | return gprs_llgmm_unassign(llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1373 | |
Jacob Erlbeck | 218ed40 | 2014-11-11 08:55:13 +0100 | [diff] [blame] | 1374 | gprs_llgmm_reset(llme); |
| 1375 | |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1376 | /* Don't force it into re-attachment */ |
| 1377 | if (gh->msg_type == GSM48_MT_GMM_DETACH_REQ) { |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1378 | /* Handle Detach Request */ |
| 1379 | rc = gsm48_rx_gmm_det_req(NULL, msg); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1380 | |
| 1381 | /* TLLI unassignment */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1382 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1383 | return rc; |
| 1384 | } |
| 1385 | |
| 1386 | /* Force the MS to re-attach */ |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 1387 | rc = gsm0408_gprs_force_reattach_oldmsg(msg, llme); |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1388 | |
| 1389 | /* TLLI unassignment */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1390 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1391 | return rc; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1392 | } |
| 1393 | |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1394 | /* |
| 1395 | * For a few messages, mmctx may be NULL. For most, we want to ensure a |
| 1396 | * non-NULL mmctx. At the same time, we want to keep the message |
| 1397 | * validity check intact, so that all message types appear in the |
| 1398 | * switch statement and the default case thus means "unknown message". |
| 1399 | * If we split the switch in two parts to check non-NULL halfway, the |
| 1400 | * unknown-message check breaks, or we'd need to duplicate the switch |
| 1401 | * cases in both parts. Just keep one large switch and add some gotos. |
| 1402 | */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1403 | switch (gh->msg_type) { |
| 1404 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1405 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1406 | break; |
| 1407 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1408 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1409 | break; |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1410 | /* For all the following types mmctx can not be NULL */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1411 | case GSM48_MT_GMM_ID_RESP: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1412 | if (!mmctx) |
| 1413 | goto null_mmctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1414 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1415 | break; |
| 1416 | case GSM48_MT_GMM_STATUS: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1417 | if (!mmctx) |
| 1418 | goto null_mmctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1419 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1420 | break; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1421 | case GSM48_MT_GMM_DETACH_REQ: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1422 | if (!mmctx) |
| 1423 | goto null_mmctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1424 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1425 | break; |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1426 | case GSM48_MT_GMM_DETACH_ACK: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1427 | if (!mmctx) |
| 1428 | goto null_mmctx; |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1429 | LOGMMCTXP(LOGL_INFO, mmctx, "-> DETACH ACK\n"); |
| 1430 | mm_ctx_cleanup_free(mmctx, "GPRS DETACH ACK"); |
| 1431 | rc = 0; |
| 1432 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1433 | case GSM48_MT_GMM_ATTACH_COMPL: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1434 | if (!mmctx) |
| 1435 | goto null_mmctx; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1436 | /* only in case SGSN offered new P-TMSI */ |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1437 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ATTACH COMPLETE\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1438 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1439 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1440 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1441 | mmctx->pending_req = 0; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1442 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1443 | /* Unassign the old TLLI */ |
| 1444 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1445 | gprs_llme_copy_key(mmctx, mmctx->gb.llme); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1446 | gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1447 | mmctx->gb.tlli_new); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1448 | } |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1449 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1450 | rc = 0; |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1451 | |
| 1452 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1453 | sig_data.mm = mmctx; |
| 1454 | osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1455 | break; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1456 | case GSM48_MT_GMM_RA_UPD_COMPL: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1457 | if (!mmctx) |
| 1458 | goto null_mmctx; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1459 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | b25510a | 2015-08-16 18:14:33 +0200 | [diff] [blame] | 1460 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ROUTING AREA UPDATE COMPLETE\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1461 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1462 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1463 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1464 | mmctx->pending_req = 0; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1465 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1466 | /* Unassign the old TLLI */ |
| 1467 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1468 | gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, |
| 1469 | mmctx->gb.tlli_new); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1470 | } |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1471 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1472 | rc = 0; |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1473 | |
| 1474 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1475 | sig_data.mm = mmctx; |
| 1476 | osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1477 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1478 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1479 | if (!mmctx) |
| 1480 | goto null_mmctx; |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1481 | LOGMMCTXP(LOGL_INFO, mmctx, "-> PTMSI REALLLICATION COMPLETE\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1482 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1483 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1484 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1485 | mmctx->pending_req = 0; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1486 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1487 | /* Unassign the old TLLI */ |
| 1488 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
| 1489 | //gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, mmctx->gb.tlli_new, GPRS_ALGO_GEA0, NULL); |
| 1490 | } |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1491 | rc = 0; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1492 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1493 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1494 | if (!mmctx) |
| 1495 | goto null_mmctx; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1496 | rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1497 | break; |
| 1498 | default: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1499 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GMM msg type 0x%02x\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1500 | gh->msg_type); |
Neels Hofmeyr | d0ba6d6 | 2016-06-03 00:44:23 +0200 | [diff] [blame] | 1501 | if (mmctx) |
| 1502 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
| 1503 | else |
| 1504 | rc = -EINVAL; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1505 | break; |
| 1506 | } |
| 1507 | |
| 1508 | return rc; |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1509 | |
| 1510 | null_mmctx: |
| 1511 | LOGP(DMM, LOGL_ERROR, |
| 1512 | "Received GSM 04.08 message type 0x%02x," |
| 1513 | " but no MM context available\n", |
| 1514 | gh->msg_type); |
| 1515 | return -EINVAL; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1516 | } |
| 1517 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1518 | static void mmctx_timer_cb(void *_mm) |
| 1519 | { |
| 1520 | struct sgsn_mm_ctx *mm = _mm; |
Jacob Erlbeck | 4d12767 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1521 | struct gsm_auth_tuple *at; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1522 | |
| 1523 | mm->num_T_exp++; |
| 1524 | |
| 1525 | switch (mm->T) { |
| 1526 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 1527 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1528 | LOGMMCTXP(LOGL_NOTICE, mm, "T3350 expired >= 5 times\n"); |
Jacob Erlbeck | 2533588 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1529 | mm_ctx_cleanup_free(mm, "T3350"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1530 | /* FIXME: should we return some error? */ |
| 1531 | break; |
| 1532 | } |
| 1533 | /* re-transmit the respective msg and re-start timer */ |
| 1534 | switch (mm->t3350_mode) { |
| 1535 | case GMM_T3350_MODE_ATT: |
| 1536 | gsm48_tx_gmm_att_ack(mm); |
| 1537 | break; |
| 1538 | case GMM_T3350_MODE_RAU: |
| 1539 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 1540 | break; |
| 1541 | case GMM_T3350_MODE_PTMSI_REALL: |
| 1542 | /* FIXME */ |
| 1543 | break; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1544 | case GMM_T3350_MODE_NONE: |
| 1545 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 1546 | "T3350 mode wasn't set, ignoring timeout\n"); |
| 1547 | break; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1548 | } |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1549 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3350, 0); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1550 | break; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1551 | case 3360: /* waiting for AUTH AND CIPH RESP */ |
| 1552 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1553 | LOGMMCTXP(LOGL_NOTICE, mm, "T3360 expired >= 5 times\n"); |
Jacob Erlbeck | 2533588 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1554 | mm_ctx_cleanup_free(mm, "T3360"); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1555 | break; |
| 1556 | } |
Jacob Erlbeck | 4d12767 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1557 | /* Re-transmit the respective msg and re-start timer */ |
| 1558 | if (mm->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 1559 | LOGMMCTXP(LOGL_ERROR, mm, |
| 1560 | "timeout: invalid auth triplet reference\n"); |
| 1561 | mm_ctx_cleanup_free(mm, "T3360"); |
| 1562 | break; |
| 1563 | } |
| 1564 | at = &mm->auth_triplet; |
| 1565 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 1566 | gsm48_tx_gmm_auth_ciph_req(mm, at->vec.rand, at->key_seq, false); |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1567 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3360, 0); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1568 | break; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1569 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 1570 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1571 | LOGMMCTXP(LOGL_NOTICE, mm, "T3370 expired >= 5 times\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1572 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Jacob Erlbeck | 2533588 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1573 | mm_ctx_cleanup_free(mm, "GPRS ATTACH REJECT (T3370)"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1574 | break; |
| 1575 | } |
| 1576 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 1577 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1578 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3370, 0); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1579 | break; |
| 1580 | default: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1581 | LOGMMCTXP(LOGL_ERROR, mm, "timer expired in unknown mode %u\n", |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1582 | mm->T); |
| 1583 | } |
| 1584 | } |
| 1585 | |
| 1586 | /* GPRS SESSION MANAGEMENT */ |
| 1587 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1588 | static void pdpctx_timer_cb(void *_mm); |
| 1589 | |
| 1590 | static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, |
| 1591 | unsigned int seconds) |
| 1592 | { |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1593 | if (osmo_timer_pending(&pdp->timer)) |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 1594 | LOGMMCTXP(LOGL_ERROR, pdp->mm, "Starting MM timer %u while old " |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1595 | "timer %u pending\n", T, pdp->T); |
| 1596 | pdp->T = T; |
| 1597 | pdp->num_T_exp = 0; |
| 1598 | |
| 1599 | /* FIXME: we should do this only once ? */ |
| 1600 | pdp->timer.data = pdp; |
| 1601 | pdp->timer.cb = &pdpctx_timer_cb; |
| 1602 | |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1603 | osmo_timer_schedule(&pdp->timer, seconds, 0); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1604 | } |
| 1605 | |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1606 | #if 0 |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1607 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 1608 | { |
| 1609 | uint8_t v[6]; |
| 1610 | |
| 1611 | v[0] = PDP_TYPE_ORG_IETF; |
| 1612 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 1613 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 1614 | |
| 1615 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1616 | } |
| 1617 | |
| 1618 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 1619 | { |
| 1620 | uint8_t v[2]; |
| 1621 | |
| 1622 | v[0] = PDP_TYPE_ORG_ETSI; |
| 1623 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 1624 | |
| 1625 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1626 | } |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1627 | #endif |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1628 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1629 | /* Section 9.5.2: Activate PDP Context Accept */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1630 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1631 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1632 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP ACC"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1633 | struct gsm48_hdr *gh; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1634 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1635 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1636 | LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1637 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_ACCEPT]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1638 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1639 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1640 | |
| 1641 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1642 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1643 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1644 | |
| 1645 | /* Negotiated LLC SAPI */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1646 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1647 | |
Harald Welte | 540dcbc | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 1648 | /* FIXME: copy QoS parameters from original request */ |
| 1649 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 1650 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1651 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1652 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1653 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1654 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1655 | /* PDP address */ |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1656 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 1657 | * the IE is identical with the 04.08 PDP Address IE */ |
| 1658 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1659 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 1660 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1661 | pdp->lib->eua.v[0] |= 0xf0; |
| 1662 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1663 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
Holger Hans Peter Freyther | 1b51fc2 | 2014-04-04 11:55:21 +0200 | [diff] [blame] | 1664 | if (pdp->lib->pco_req.l) |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1665 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | f2d6658 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 1666 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1667 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1668 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1669 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1670 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm, true); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1671 | } |
| 1672 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1673 | /* Section 9.5.3: Activate PDP Context reject */ |
| 1674 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1675 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 1676 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1677 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP REJ"); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1678 | struct gsm48_hdr *gh; |
| 1679 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1680 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1681 | LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1682 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REJECT]); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1683 | |
| 1684 | mmctx2msgid(msg, mm); |
| 1685 | |
| 1686 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1687 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1688 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 1689 | |
| 1690 | msgb_v_put(msg, cause); |
| 1691 | if (pco_len && pco_v) |
| 1692 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 1693 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1694 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1695 | } |
| 1696 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1697 | /* Section 9.5.8: Deactivate PDP Context Request */ |
| 1698 | static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1699 | uint8_t sm_cause) |
| 1700 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1701 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET REQ"); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1702 | struct gsm48_hdr *gh; |
| 1703 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1704 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1705 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1706 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_REQUEST]); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1707 | |
| 1708 | mmctx2msgid(msg, mm); |
| 1709 | |
| 1710 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1711 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1712 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; |
| 1713 | |
| 1714 | msgb_v_put(msg, sm_cause); |
| 1715 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1716 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1717 | } |
| 1718 | int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause) |
| 1719 | { |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1720 | pdpctx_timer_start(pdp, 3395, sgsn->cfg.timers.T3395); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1721 | |
| 1722 | return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause); |
| 1723 | } |
| 1724 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1725 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1726 | static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1727 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1728 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET ACC"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1729 | struct gsm48_hdr *gh; |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1730 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1731 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1732 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1733 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_ACCEPT]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1734 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1735 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1736 | |
| 1737 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1738 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1739 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 1740 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1741 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1742 | } |
| 1743 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 1744 | { |
| 1745 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1746 | } |
| 1747 | |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 1748 | static int activate_ggsn(struct sgsn_mm_ctx *mmctx, |
| 1749 | struct sgsn_ggsn_ctx *ggsn, const uint8_t transaction_id, |
| 1750 | const uint8_t req_nsapi, const uint8_t req_llc_sapi, |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1751 | struct tlv_parsed *tp, int destroy_ggsn) |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 1752 | { |
| 1753 | struct sgsn_pdp_ctx *pdp; |
| 1754 | |
Holger Hans Peter Freyther | 4b4f7b7 | 2015-05-29 15:11:55 +0200 | [diff] [blame] | 1755 | LOGMMCTXP(LOGL_DEBUG, mmctx, "Using GGSN %u\n", ggsn->id); |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 1756 | ggsn->gsn = sgsn->gsn; |
| 1757 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, req_nsapi, tp); |
| 1758 | if (!pdp) |
| 1759 | return -1; |
| 1760 | |
| 1761 | /* Store SAPI and Transaction Identifier */ |
| 1762 | pdp->sapi = req_llc_sapi; |
| 1763 | pdp->ti = transaction_id; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1764 | pdp->destroy_ggsn = destroy_ggsn; |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 1765 | |
| 1766 | return 0; |
| 1767 | } |
| 1768 | |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1769 | static void ggsn_lookup_cb(void *arg, int status, int timeouts, struct hostent *hostent) |
| 1770 | { |
| 1771 | struct sgsn_ggsn_ctx *ggsn; |
| 1772 | struct sgsn_ggsn_lookup *lookup = arg; |
| 1773 | struct in_addr *addr = NULL; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1774 | |
| 1775 | /* The context is gone while we made a request */ |
| 1776 | if (!lookup->mmctx) { |
| 1777 | talloc_free(lookup); |
| 1778 | return; |
| 1779 | } |
| 1780 | |
| 1781 | if (status != ARES_SUCCESS) { |
| 1782 | struct sgsn_mm_ctx *mmctx = lookup->mmctx; |
| 1783 | |
| 1784 | LOGMMCTXP(LOGL_ERROR, mmctx, "DNS query failed.\n"); |
| 1785 | |
| 1786 | /* Need to try with three digits now */ |
| 1787 | if (lookup->state == SGSN_GGSN_2DIGIT) { |
| 1788 | char *hostname; |
| 1789 | int rc; |
| 1790 | |
| 1791 | lookup->state = SGSN_GGSN_3DIGIT; |
| 1792 | hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, |
| 1793 | lookup->apn_str, 1); |
| 1794 | LOGMMCTXP(LOGL_DEBUG, mmctx, |
| 1795 | "Going to query %s\n", hostname); |
| 1796 | rc = sgsn_ares_query(sgsn, hostname, |
| 1797 | ggsn_lookup_cb, lookup); |
| 1798 | if (rc != 0) { |
Harald Welte | 0b8dbb7 | 2015-08-16 17:16:28 +0200 | [diff] [blame] | 1799 | LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't start GGSN\n"); |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1800 | goto reject_due_failure; |
| 1801 | } |
| 1802 | return; |
| 1803 | } |
| 1804 | |
| 1805 | LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't resolve GGSN\n"); |
| 1806 | goto reject_due_failure; |
| 1807 | } |
| 1808 | |
| 1809 | if (hostent->h_length != sizeof(struct in_addr)) { |
| 1810 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, |
Harald Welte | 369fb07 | 2015-08-16 17:16:57 +0200 | [diff] [blame] | 1811 | "Wrong addr size(%zu)\n", sizeof(struct in_addr)); |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1812 | goto reject_due_failure; |
| 1813 | } |
| 1814 | |
Holger Hans Peter Freyther | b985234 | 2015-06-02 09:38:41 +0200 | [diff] [blame] | 1815 | /* Get the first addr from the list */ |
| 1816 | addr = (struct in_addr *) hostent->h_addr_list[0]; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1817 | if (!addr) { |
| 1818 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "No host address.\n"); |
| 1819 | goto reject_due_failure; |
| 1820 | } |
| 1821 | |
| 1822 | ggsn = sgsn_ggsn_ctx_alloc(UINT32_MAX); |
| 1823 | if (!ggsn) { |
| 1824 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "Failed to create ggsn.\n"); |
| 1825 | goto reject_due_failure; |
| 1826 | } |
| 1827 | ggsn->remote_addr = *addr; |
| 1828 | LOGMMCTXP(LOGL_NOTICE, lookup->mmctx, |
| 1829 | "Selected %s as GGSN.\n", inet_ntoa(*addr)); |
| 1830 | |
| 1831 | /* forget about the ggsn look-up */ |
| 1832 | lookup->mmctx->ggsn_lookup = NULL; |
| 1833 | |
| 1834 | activate_ggsn(lookup->mmctx, ggsn, lookup->ti, lookup->nsapi, |
| 1835 | lookup->sapi, &lookup->tp, 1); |
| 1836 | |
| 1837 | /* Now free it */ |
| 1838 | talloc_free(lookup); |
| 1839 | return; |
| 1840 | |
| 1841 | reject_due_failure: |
| 1842 | gsm48_tx_gsm_act_pdp_rej(lookup->mmctx, lookup->ti, |
| 1843 | GMM_CAUSE_NET_FAIL, 0, NULL); |
| 1844 | lookup->mmctx->ggsn_lookup = NULL; |
| 1845 | talloc_free(lookup); |
| 1846 | } |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 1847 | |
| 1848 | static int do_act_pdp_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1849 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1850 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1851 | struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data; |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1852 | uint8_t req_qos_len, req_pdpa_len; |
| 1853 | uint8_t *req_qos, *req_pdpa; |
| 1854 | struct tlv_parsed tp; |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 1855 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1856 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1857 | struct sgsn_pdp_ctx *pdp; |
Jacob Erlbeck | 3400f11 | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 1858 | enum gsm48_gsm_cause gsm_cause; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1859 | char apn_str[GSM_APN_LENGTH] = { 0, }; |
| 1860 | char *hostname; |
| 1861 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1862 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1863 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1864 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1865 | |
Harald Welte | b7b0fd7 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1866 | /* FIXME: length checks! */ |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1867 | req_qos_len = act_req->data[0]; |
| 1868 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 1869 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 1870 | req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1871 | |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1872 | switch (req_pdpa[0] & 0xf) { |
| 1873 | case 0x0: |
| 1874 | DEBUGPC(DMM, "ETSI "); |
| 1875 | break; |
| 1876 | case 0x1: |
| 1877 | DEBUGPC(DMM, "IETF "); |
| 1878 | break; |
| 1879 | case 0xf: |
| 1880 | DEBUGPC(DMM, "Empty "); |
| 1881 | break; |
| 1882 | } |
| 1883 | |
| 1884 | switch (req_pdpa[1]) { |
| 1885 | case 0x21: |
| 1886 | DEBUGPC(DMM, "IPv4 "); |
| 1887 | if (req_pdpa_len >= 6) { |
| 1888 | struct in_addr ia; |
| 1889 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 1890 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 1891 | } |
| 1892 | break; |
| 1893 | case 0x57: |
| 1894 | DEBUGPC(DMM, "IPv6 "); |
| 1895 | if (req_pdpa_len >= 18) { |
| 1896 | /* FIXME: print IPv6 address */ |
| 1897 | } |
| 1898 | break; |
| 1899 | default: |
| 1900 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 1901 | break; |
| 1902 | } |
| 1903 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1904 | LOGPC(DMM, LOGL_INFO, "\n"); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1905 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1906 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 1907 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 1908 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 1909 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1910 | GSM_CAUSE_INV_MAND_INFO, |
| 1911 | 0, NULL); |
| 1912 | } |
| 1913 | |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 1914 | /* Optional: Access Point Name, Protocol Config Options */ |
| 1915 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 1916 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 1917 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 1918 | else |
| 1919 | memset(&tp, 0, sizeof(tp)); |
| 1920 | |
| 1921 | |
| 1922 | /* put the non-TLV elements in the TLV parser structure to |
| 1923 | * pass them on to the SGSN / GTP code */ |
| 1924 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 1925 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 1926 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 1927 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 1928 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1929 | /* Check if NSAPI is already in use */ |
Harald Welte | 5fbac98 | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 1930 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 1931 | if (pdp) { |
| 1932 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 1933 | if (pdp->sapi == act_req->req_llc_sapi && |
| 1934 | pdp->ti == transaction_id) { |
| 1935 | /* This apparently is a re-transmission of a PDP CTX |
| 1936 | * ACT REQ (our ACT ACK must have got dropped) */ |
| 1937 | return gsm48_tx_gsm_act_pdp_acc(pdp); |
| 1938 | } |
| 1939 | |
| 1940 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1941 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1942 | GSM_CAUSE_NSAPI_IN_USE, |
| 1943 | 0, NULL); |
| 1944 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1945 | |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1946 | if (mmctx->ggsn_lookup) { |
| 1947 | if (mmctx->ggsn_lookup->sapi == act_req->req_llc_sapi && |
| 1948 | mmctx->ggsn_lookup->ti == transaction_id) { |
| 1949 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 1950 | "Re-transmission while doing look-up. Ignoring.\n"); |
| 1951 | return 0; |
| 1952 | } |
| 1953 | } |
| 1954 | |
Harald Welte | a456a23 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 1955 | /* Only increment counter for a real activation, after we checked |
| 1956 | * for re-transmissions */ |
| 1957 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 1958 | |
Jacob Erlbeck | 3400f11 | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 1959 | /* Determine GGSN based on APN and subscription options */ |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1960 | ggsn = sgsn_mm_ctx_find_ggsn_ctx(mmctx, &tp, &gsm_cause, apn_str); |
| 1961 | if (ggsn) |
| 1962 | return activate_ggsn(mmctx, ggsn, transaction_id, |
| 1963 | act_req->req_nsapi, act_req->req_llc_sapi, |
| 1964 | &tp, 0); |
| 1965 | |
| 1966 | if (strlen(apn_str) == 0) |
| 1967 | goto no_context; |
| 1968 | if (!sgsn->cfg.dynamic_lookup) |
| 1969 | goto no_context; |
| 1970 | |
| 1971 | /* schedule a dynamic look-up */ |
| 1972 | mmctx->ggsn_lookup = talloc_zero(tall_bsc_ctx, struct sgsn_ggsn_lookup); |
| 1973 | if (!mmctx->ggsn_lookup) |
| 1974 | goto no_context; |
| 1975 | |
| 1976 | mmctx->ggsn_lookup->state = SGSN_GGSN_2DIGIT; |
| 1977 | mmctx->ggsn_lookup->mmctx = mmctx; |
| 1978 | strcpy(mmctx->ggsn_lookup->apn_str, apn_str); |
| 1979 | |
| 1980 | mmctx->ggsn_lookup->orig_msg = msg; |
| 1981 | mmctx->ggsn_lookup->tp = tp; |
| 1982 | |
| 1983 | mmctx->ggsn_lookup->ti = transaction_id; |
| 1984 | mmctx->ggsn_lookup->nsapi = act_req->req_nsapi; |
| 1985 | mmctx->ggsn_lookup->sapi = act_req->req_llc_sapi; |
| 1986 | |
| 1987 | hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, |
| 1988 | mmctx->ggsn_lookup->apn_str, 0); |
| 1989 | |
| 1990 | LOGMMCTXP(LOGL_DEBUG, mmctx, "Going to query %s\n", hostname); |
| 1991 | rc = sgsn_ares_query(sgsn, hostname, |
| 1992 | ggsn_lookup_cb, mmctx->ggsn_lookup); |
| 1993 | if (rc != 0) { |
| 1994 | LOGMMCTXP(LOGL_ERROR, mmctx, "Failed to start ares query.\n"); |
| 1995 | goto no_context; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1996 | } |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1997 | |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 1998 | return 0; |
| 1999 | |
| 2000 | no_context: |
Harald Welte | 0b8dbb7 | 2015-08-16 17:16:28 +0200 | [diff] [blame] | 2001 | LOGMMCTXP(LOGL_ERROR, mmctx, "No GGSN context found!\n"); |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2002 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2003 | gsm_cause, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2004 | } |
| 2005 | |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2006 | /* Section 9.5.1: Activate PDP Context Request */ |
| 2007 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 2008 | struct msgb *_msg) |
| 2009 | { |
| 2010 | struct msgb *msg; |
| 2011 | int rc; |
| 2012 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2013 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REQUEST]); |
| 2014 | |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2015 | /* |
| 2016 | * This is painful. We might not have a static GGSN |
| 2017 | * configuration and then would need to copy the msg |
| 2018 | * and re-do most of this routine (or call it again |
| 2019 | * and make sure it only goes through the dynamic |
| 2020 | * resolving. The question is what to optimize for |
| 2021 | * and the dynamic resolution will be the right thing |
| 2022 | * in the long run. |
| 2023 | */ |
| 2024 | msg = gprs_msgb_copy(_msg, __func__); |
| 2025 | if (!msg) { |
| 2026 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(_msg); |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2027 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2028 | |
| 2029 | LOGMMCTXP(LOGL_ERROR, mmctx, "-> ACTIVATE PDP CONTEXT REQ failed copy.\n"); |
| 2030 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 2031 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2032 | GSM_CAUSE_NET_FAIL, |
| 2033 | 0, NULL); |
| 2034 | } |
| 2035 | |
| 2036 | rc = do_act_pdp_req(mmctx, _msg); |
| 2037 | msgb_free(msg); |
| 2038 | return rc; |
| 2039 | } |
| 2040 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2041 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2042 | static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2043 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2044 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2045 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2046 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2047 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2048 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 2049 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2050 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_REQUEST]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2051 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2052 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 2053 | if (!pdp) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2054 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for " |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2055 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 2056 | mm->imsi, transaction_id); |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2057 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2058 | } |
| 2059 | |
| 2060 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2061 | } |
| 2062 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2063 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
| 2064 | static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) |
| 2065 | { |
| 2066 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2067 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2068 | struct sgsn_pdp_ctx *pdp; |
| 2069 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2070 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2071 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_ACCEPT]); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2072 | |
| 2073 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 2074 | if (!pdp) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2075 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for " |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2076 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 2077 | mm->imsi, transaction_id); |
| 2078 | return 0; |
| 2079 | } |
| 2080 | |
| 2081 | return sgsn_delete_pdp_ctx(pdp); |
| 2082 | } |
| 2083 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2084 | static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2085 | { |
| 2086 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 2087 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2088 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 2089 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2090 | |
| 2091 | return 0; |
| 2092 | } |
| 2093 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2094 | static void pdpctx_timer_cb(void *_pdp) |
| 2095 | { |
| 2096 | struct sgsn_pdp_ctx *pdp = _pdp; |
| 2097 | |
| 2098 | pdp->num_T_exp++; |
| 2099 | |
| 2100 | switch (pdp->T) { |
| 2101 | case 3395: /* waiting for PDP CTX DEACT ACK */ |
| 2102 | if (pdp->num_T_exp >= 4) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2103 | LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired >= 5 times\n"); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2104 | pdp->state = PDP_STATE_INACTIVE; |
| 2105 | sgsn_delete_pdp_ctx(pdp); |
| 2106 | break; |
| 2107 | } |
Alexander Couzens | 88790b2 | 2016-07-19 15:14:03 +0200 | [diff] [blame] | 2108 | gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2109 | break; |
| 2110 | default: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2111 | LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n", |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2112 | pdp->T); |
| 2113 | } |
| 2114 | } |
| 2115 | |
| 2116 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2117 | /* GPRS Session Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2118 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 2119 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2120 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2121 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2122 | int rc; |
| 2123 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2124 | /* MMCTX can be NULL when called */ |
| 2125 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2126 | if (!mmctx) { |
| 2127 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2128 | /* 6.1.3.6 */ |
| 2129 | if (gh->msg_type == GSM48_MT_GSM_STATUS) |
| 2130 | return 0; |
| 2131 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2132 | return gsm0408_gprs_force_reattach_oldmsg(msg, llme); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2133 | } |
| 2134 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2135 | switch (gh->msg_type) { |
| 2136 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2137 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2138 | break; |
| 2139 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2140 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2141 | break; |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2142 | case GSM48_MT_GSM_DEACT_PDP_ACK: |
| 2143 | rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); |
| 2144 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2145 | case GSM48_MT_GSM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2146 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2147 | break; |
| 2148 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 2149 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 2150 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
Harald Welte | 20cbe91 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2151 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x: %s\n", |
| 2152 | gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 2153 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2154 | break; |
| 2155 | default: |
Harald Welte | 20cbe91 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2156 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x: %s\n", |
| 2157 | gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 2158 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2159 | break; |
| 2160 | |
| 2161 | } |
| 2162 | |
| 2163 | return rc; |
| 2164 | } |
| 2165 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2166 | int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg, |
| 2167 | struct gprs_llc_llme *llme) |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2168 | { |
Jacob Erlbeck | 6e15b73 | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2169 | int rc; |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2170 | gprs_llgmm_reset_oldmsg(msg, GPRS_SAPI_GMM, llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2171 | |
Jacob Erlbeck | 6e15b73 | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2172 | rc = gsm48_tx_gmm_detach_req_oldmsg( |
| 2173 | msg, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2174 | |
Jacob Erlbeck | 6e15b73 | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2175 | return rc; |
| 2176 | } |
| 2177 | |
| 2178 | int gsm0408_gprs_force_reattach(struct sgsn_mm_ctx *mmctx) |
| 2179 | { |
| 2180 | int rc; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2181 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) |
| 2182 | gprs_llgmm_reset(mmctx->gb.llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2183 | |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2184 | rc = gsm48_tx_gmm_detach_req( |
| 2185 | mmctx, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2186 | |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2187 | mm_ctx_cleanup_free(mmctx, "forced reattach"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2188 | |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2189 | return rc; |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2190 | } |
| 2191 | |
Harald Welte | beaf11d | 2015-12-25 19:14:57 +0100 | [diff] [blame] | 2192 | /* Main entry point for incoming 04.08 GPRS messages from Gb */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2193 | int gsm0408_gprs_rcvmsg_gb(struct msgb *msg, struct gprs_llc_llme *llme, |
| 2194 | bool drop_cipherable) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2195 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2196 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | f94dfd5 | 2016-03-14 16:13:24 +0100 | [diff] [blame] | 2197 | uint8_t pdisc = gsm48_hdr_pdisc(gh); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2198 | struct sgsn_mm_ctx *mmctx; |
| 2199 | struct gprs_ra_id ra_id; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2200 | int rc = -EINVAL; |
| 2201 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2202 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 2203 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2204 | if (mmctx) { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2205 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2206 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 2207 | mmctx->gb.llme = llme; |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2208 | } |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2209 | |
| 2210 | /* MMCTX can be NULL */ |
| 2211 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2212 | switch (pdisc) { |
| 2213 | case GSM48_PDISC_MM_GPRS: |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2214 | rc = gsm0408_rcv_gmm(mmctx, msg, llme, drop_cipherable); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2215 | break; |
| 2216 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2217 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2218 | break; |
| 2219 | default: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 2220 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 2221 | "Unknown GSM 04.08 discriminator 0x%02x: %s\n", |
Harald Welte | 20cbe91 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2222 | pdisc, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2223 | /* FIXME: return status message */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2224 | break; |
| 2225 | } |
| 2226 | |
Jacob Erlbeck | 12396bd | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 2227 | /* MMCTX can be invalid */ |
| 2228 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2229 | return rc; |
| 2230 | } |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 2231 | |
| 2232 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 2233 | { |
| 2234 | struct sgsn_mm_ctx *mmctx; |
| 2235 | |
| 2236 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 2237 | if (!mmctx) { |
| 2238 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 2239 | "TLLI=%08x\n", tlli); |
| 2240 | return -EINVAL; |
| 2241 | } |
| 2242 | |
Jacob Erlbeck | 764b8d5 | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 2243 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 2244 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2245 | LOGMMCTXP(LOGL_NOTICE, mmctx, "SUSPEND request while state " |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 2246 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 2247 | return -EINVAL; |
| 2248 | } |
| 2249 | |
| 2250 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
| 2251 | mmctx->mm_state = GMM_REGISTERED_SUSPENDED; |
| 2252 | return 0; |
| 2253 | } |
| 2254 | |
| 2255 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 2256 | uint8_t suspend_ref) |
| 2257 | { |
| 2258 | struct sgsn_mm_ctx *mmctx; |
| 2259 | |
| 2260 | /* FIXME: make use of suspend reference? */ |
| 2261 | |
| 2262 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 2263 | if (!mmctx) { |
| 2264 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 2265 | "TLLI=%08x\n", tlli); |
| 2266 | return -EINVAL; |
| 2267 | } |
| 2268 | |
Jacob Erlbeck | 764b8d5 | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 2269 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 2270 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2271 | LOGMMCTXP(LOGL_NOTICE, mmctx, "RESUME request while state " |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 2272 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 2273 | /* FIXME: should we not simply ignore it? */ |
| 2274 | return -EINVAL; |
| 2275 | } |
| 2276 | |
| 2277 | /* Transition from SUSPENDED to NORMAL */ |
| 2278 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
| 2279 | return 0; |
| 2280 | } |