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 | |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 36 | #include "bscconfig.h" |
| 37 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 38 | #include <openbsc/db.h> |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 39 | #include <osmocom/core/msgb.h> |
Harald Welte | 8b1713a | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 40 | #include <osmocom/gsm/tlv.h> |
| 41 | #include <osmocom/gsm/gsm_utils.h> |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 42 | #include <osmocom/core/signal.h> |
| 43 | #include <osmocom/core/talloc.h> |
| 44 | #include <osmocom/core/rate_ctr.h> |
Daniel Willmann | c3eb6a3 | 2016-05-21 00:31:12 +0200 | [diff] [blame] | 45 | #include <osmocom/crypt/auth.h> |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 46 | #include <osmocom/gsm/apn.h> |
Harald Welte | 35ade5e | 2016-04-20 17:11:43 +0200 | [diff] [blame] | 47 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 48 | |
Harald Welte | cfb6b28 | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 49 | #include <osmocom/gprs/gprs_bssgp.h> |
| 50 | |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 51 | #ifdef BUILD_IU |
| 52 | #include <osmocom/ranap/ranap_ies_defs.h> |
Daniel Willmann | e0181a2 | 2016-05-21 00:35:41 +0200 | [diff] [blame] | 53 | #include <osmocom/ranap/ranap_msg_factory.h> |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 54 | #endif |
| 55 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 56 | #include <openbsc/debug.h> |
| 57 | #include <openbsc/gsm_data.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 58 | #include <openbsc/gsm_subscriber.h> |
| 59 | #include <openbsc/gsm_04_08.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 60 | #include <openbsc/paging.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 61 | #include <openbsc/transaction.h> |
| 62 | #include <openbsc/gprs_llc.h> |
| 63 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 64 | #include <openbsc/gprs_gmm.h> |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 65 | #include <openbsc/gprs_utils.h> |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 66 | #include <openbsc/sgsn.h> |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 67 | #include <openbsc/signal.h> |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 68 | #include <openbsc/iu.h> |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 69 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 70 | #include <pdp.h> |
| 71 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 72 | #define PTMSI_ALLOC |
| 73 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 74 | extern struct sgsn_instance *sgsn; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 75 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 76 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 77 | .def = { |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 78 | [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 79 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 80 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 81 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_FIXED, 3 }, |
| 82 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_FIXED, 16 }, |
| 83 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 84 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 85 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 86 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 87 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 88 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 89 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 90 | }, |
| 91 | }; |
| 92 | |
| 93 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 94 | .def = { |
| 95 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 96 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 97 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 98 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 99 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 100 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 101 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, |
| 102 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 103 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 104 | }, |
| 105 | }; |
| 106 | |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 107 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx); |
| 108 | |
Daniel Willmann | 3d224b6 | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 109 | static void mmctx_change_gtpu_endpoints_to_sgsn(struct sgsn_mm_ctx *mm_ctx) |
| 110 | { |
| 111 | struct sgsn_pdp_ctx *pdp; |
| 112 | llist_for_each_entry(pdp, &mm_ctx->pdp_list, list) { |
| 113 | sgsn_pdp_upd_gtp_u(pdp, |
| 114 | &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 115 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
| 116 | } |
| 117 | } |
| 118 | |
Daniel Willmann | e986183 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 119 | void mmctx_set_pmm_state(struct sgsn_mm_ctx *ctx, enum gprs_pmm_state state) |
| 120 | { |
| 121 | if (ctx->pmm_state == state) |
| 122 | return; |
| 123 | |
| 124 | LOGMMCTXP(LOGL_INFO, ctx, "Changing PMM state from %i to %i\n", ctx->pmm_state, state); |
| 125 | |
| 126 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu) |
| 127 | { |
| 128 | switch (state) { |
| 129 | case PMM_IDLE: |
Daniel Willmann | 3d224b6 | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 130 | /* TODO: start RA Upd timer */ |
| 131 | mmctx_change_gtpu_endpoints_to_sgsn(ctx); |
Daniel Willmann | e986183 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 132 | break; |
| 133 | case PMM_CONNECTED: |
| 134 | break; |
| 135 | default: |
| 136 | break; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | ctx->pmm_state = state; |
| 141 | } |
| 142 | |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 143 | #ifdef BUILD_IU |
| 144 | int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies); |
| 145 | int sgsn_ranap_iu_event(struct ue_conn_ctx *ctx, enum iu_event_type type, void *data) |
| 146 | { |
| 147 | struct sgsn_mm_ctx *mm; |
| 148 | int rc = -1; |
| 149 | |
| 150 | mm = sgsn_mm_ctx_by_ue_ctx(ctx); |
| 151 | if (!mm) { |
| 152 | LOGP(DRANAP, LOGL_NOTICE, "Cannot find mm ctx for IU event %i!\n", type); |
| 153 | return rc; |
| 154 | } |
| 155 | |
| 156 | switch (type) { |
| 157 | case IU_EVENT_RAB_ASSIGN: |
| 158 | rc = sgsn_ranap_rab_ass_resp(mm, (RANAP_RAB_SetupOrModifiedItemIEs_t *)data); |
| 159 | break; |
| 160 | case IU_EVENT_IU_RELEASE: |
| 161 | /* fall thru */ |
| 162 | case IU_EVENT_LINK_INVALIDATED: |
| 163 | /* Clean up ue_conn_ctx here */ |
| 164 | LOGMMCTXP(LOGL_INFO, mm, "IU release for imsi %s\n", mm->imsi); |
Daniel Willmann | 7d62c88 | 2016-05-21 00:01:21 +0200 | [diff] [blame] | 165 | if (mm->pmm_state == PMM_CONNECTED) |
Daniel Willmann | e986183 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 166 | mmctx_set_pmm_state(mm, PMM_IDLE); |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 167 | rc = 0; |
| 168 | break; |
| 169 | case IU_EVENT_SECURITY_MODE_COMPLETE: |
| 170 | /* Continue authentication here */ |
| 171 | mm->iu.ue_ctx->integrity_active = 1; |
| 172 | rc = gsm48_gmm_authorize(mm); |
| 173 | break; |
| 174 | default: |
| 175 | LOGP(DRANAP, LOGL_NOTICE, "Unknown event received: %i\n", type); |
| 176 | rc = -1; |
| 177 | break; |
| 178 | } |
| 179 | return rc; |
| 180 | } |
| 181 | #endif |
| 182 | |
| 183 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 184 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 185 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 186 | static void mmctx_timer_cb(void *_mm); |
| 187 | |
| 188 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 189 | unsigned int seconds) |
| 190 | { |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 191 | if (osmo_timer_pending(&mm->timer)) |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 192 | LOGMMCTXP(LOGL_ERROR, mm, "Starting MM timer %u while old " |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 193 | "timer %u pending\n", T, mm->T); |
| 194 | mm->T = T; |
| 195 | mm->num_T_exp = 0; |
| 196 | |
| 197 | /* FIXME: we should do this only once ? */ |
| 198 | mm->timer.data = mm; |
| 199 | mm->timer.cb = &mmctx_timer_cb; |
| 200 | |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 201 | osmo_timer_schedule(&mm->timer, seconds, 0); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 205 | { |
| 206 | if (mm->T != T) |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 207 | LOGMMCTXP(LOGL_ERROR, mm, "Stopping MM timer %u but " |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 208 | "%u is running\n", T, mm->T); |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 209 | osmo_timer_del(&mm->timer); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 210 | } |
| 211 | |
Jacob Erlbeck | e6140d0 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 212 | time_t gprs_max_time_to_idle(void) |
| 213 | { |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 214 | return sgsn->cfg.timers.T3314 + (sgsn->cfg.timers.T3312 + 4 * 60); |
Jacob Erlbeck | e6140d0 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 215 | } |
| 216 | |
Neels Hofmeyr | 2a7ce0f | 2016-08-11 19:12:54 +0200 | [diff] [blame] | 217 | /* Send a message through the underlying layer. |
| 218 | * For param encryptable, see 3GPP TS 24.008 § 4.7.1.2 and |
| 219 | * gsm48_hdr_gmm_cipherable(). Pass false for not cipherable messages. */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 220 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 221 | struct sgsn_mm_ctx *mm, bool encryptable) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 222 | { |
Daniel Willmann | 63dddc7 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 223 | if (mm) { |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 224 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
Daniel Willmann | 63dddc7 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 225 | #ifdef BUILD_IU |
| 226 | if (mm->ran_type == MM_CTX_T_UTRAN_Iu) |
| 227 | return iu_tx(msg, GPRS_SAPI_GMM); |
| 228 | #endif |
| 229 | } |
| 230 | |
| 231 | #ifdef BUILD_IU |
| 232 | /* In Iu mode, msg->dst contains the ue_conn_ctx pointer, in Gb mode |
| 233 | * dst is empty. */ |
| 234 | /* FIXME: have a more explicit indicator for Iu messages */ |
| 235 | if (msg->dst) |
| 236 | return iu_tx(msg, GPRS_SAPI_GMM); |
| 237 | #endif |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 238 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 239 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 240 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm, encryptable); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 241 | } |
| 242 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 243 | /* copy identifiers from old message to new message, this |
| 244 | * is required so lower layers can route it correctly */ |
| 245 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 246 | { |
| 247 | msgb_tlli(msg) = msgb_tlli(old); |
| 248 | msgb_bvci(msg) = msgb_bvci(old); |
| 249 | msgb_nsei(msg) = msgb_nsei(old); |
Daniel Willmann | 499d3ce | 2016-05-21 00:11:39 +0200 | [diff] [blame] | 250 | msg->dst = old->dst; |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 251 | } |
| 252 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 253 | /* Store BVCI/NSEI in MM context */ |
| 254 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 255 | { |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 256 | mm->gb.bvci = msgb_bvci(msg); |
| 257 | mm->gb.nsei = msgb_nsei(msg); |
Daniel Willmann | 499d3ce | 2016-05-21 00:11:39 +0200 | [diff] [blame] | 258 | /* In case a Iu connection is reconnected we need to update the ue ctx */ |
| 259 | mm->iu.ue_ctx = msg->dst; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | /* Store BVCI/NSEI in MM context */ |
| 263 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 264 | { |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 265 | msgb_tlli(msg) = mm->gb.tlli; |
| 266 | msgb_bvci(msg) = mm->gb.bvci; |
| 267 | msgb_nsei(msg) = mm->gb.nsei; |
Daniel Willmann | 499d3ce | 2016-05-21 00:11:39 +0200 | [diff] [blame] | 268 | msg->dst = mm->iu.ue_ctx; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 269 | } |
| 270 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 271 | static void mm_ctx_cleanup_free(struct sgsn_mm_ctx *ctx, const char *log_text) |
| 272 | { |
Jacob Erlbeck | 70c177a | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 273 | 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] | 274 | |
| 275 | /* Mark MM state as deregistered */ |
| 276 | ctx->mm_state = GMM_DEREGISTERED; |
Daniel Willmann | e986183 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 277 | |
| 278 | mmctx_set_pmm_state(ctx, PMM_DETACHED); |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 279 | |
Jacob Erlbeck | 70c177a | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 280 | sgsn_mm_ctx_cleanup_free(ctx); |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 281 | } |
| 282 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 283 | /* Chapter 9.4.18 */ |
| 284 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 285 | struct sgsn_mm_ctx *mmctx, int sm) |
| 286 | { |
| 287 | struct gsm48_hdr *gh; |
| 288 | |
| 289 | /* MMCTX might be NULL! */ |
| 290 | |
| 291 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 292 | get_value_string(gsm48_gmm_cause_names, cause)); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 293 | |
| 294 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 295 | if (sm) { |
| 296 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 297 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 298 | } else { |
| 299 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 300 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 301 | } |
| 302 | gh->data[0] = cause; |
| 303 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 304 | return gsm48_gmm_sendmsg(msg, 0, mmctx, true); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 305 | } |
Jacob Erlbeck | ce61bb7 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 306 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 307 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 308 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 309 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 GMM STATUS"); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 310 | |
| 311 | mmctx2msgid(msg, mmctx); |
| 312 | return _tx_status(msg, cause, mmctx, 0); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 313 | } |
Jacob Erlbeck | ce61bb7 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 314 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 315 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 316 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 317 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SM STATUS"); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 318 | |
| 319 | mmctx2msgid(msg, mmctx); |
| 320 | return _tx_status(msg, cause, mmctx, 1); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 321 | } |
| 322 | |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 323 | static int _tx_detach_req(struct msgb *msg, uint8_t detach_type, uint8_t cause, |
| 324 | struct sgsn_mm_ctx *mmctx) |
| 325 | { |
| 326 | struct gsm48_hdr *gh; |
| 327 | |
| 328 | /* MMCTX might be NULL! */ |
| 329 | |
| 330 | DEBUGP(DMM, "<- GPRS MM DETACH REQ (type: %s, cause: %s)\n", |
| 331 | get_value_string(gprs_det_t_mt_strs, detach_type), |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 332 | get_value_string(gsm48_gmm_cause_names, cause)); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 333 | |
| 334 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 335 | |
| 336 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 337 | gh->msg_type = GSM48_MT_GMM_DETACH_REQ; |
| 338 | gh->data[0] = detach_type & 0x07; |
| 339 | |
| 340 | msgb_tv_put(msg, GSM48_IE_GMM_CAUSE, cause); |
| 341 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 342 | return gsm48_gmm_sendmsg(msg, 0, mmctx, true); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | static int gsm48_tx_gmm_detach_req(struct sgsn_mm_ctx *mmctx, |
| 346 | uint8_t detach_type, uint8_t cause) |
| 347 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 348 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET REQ"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 349 | |
| 350 | mmctx2msgid(msg, mmctx); |
| 351 | return _tx_detach_req(msg, detach_type, cause, mmctx); |
| 352 | } |
| 353 | |
| 354 | static int gsm48_tx_gmm_detach_req_oldmsg(struct msgb *oldmsg, |
| 355 | uint8_t detach_type, uint8_t cause) |
| 356 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 357 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET OLD"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 358 | |
| 359 | gmm_copy_id(msg, oldmsg); |
| 360 | return _tx_detach_req(msg, detach_type, cause, NULL); |
| 361 | } |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 362 | |
Harald Welte | 242d172 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 363 | static struct gsm48_qos default_qos = { |
| 364 | .delay_class = 4, /* best effort */ |
| 365 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 366 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 367 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 368 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 369 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 370 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 371 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 372 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 373 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 374 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 375 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 376 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 377 | .handling_prio = 3, |
| 378 | .xfer_delay = 0x10, /* 200ms */ |
| 379 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 380 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 381 | .sig_ind = 0, /* not optimised for signalling */ |
| 382 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 383 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 384 | }; |
| 385 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 386 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 387 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 388 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 389 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT ACK"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 390 | struct gsm48_hdr *gh; |
| 391 | struct gsm48_attach_ack *aa; |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 392 | uint8_t *mid; |
| 393 | #if 0 |
| 394 | uint8_t *ptsig; |
| 395 | #endif |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 396 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 397 | 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] | 398 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_ACKED]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 399 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 400 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 401 | |
| 402 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 403 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 404 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 405 | |
| 406 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 407 | aa->force_stby = 0; /* not indicated */ |
| 408 | aa->att_result = 1; /* GPRS only */ |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 409 | 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] | 410 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 411 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 412 | |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 413 | #if 0 |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 414 | /* Optional: P-TMSI signature */ |
| 415 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 416 | ptsig = msgb_put(msg, 3); |
| 417 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 418 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 419 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 420 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 421 | #endif |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 422 | /* Optional: Negotiated Ready timer value |
| 423 | * (fixed 44s, default value, GSM 04.08, table 11.4a) to safely limit |
| 424 | * the inactivity time READY->STANDBY. |
| 425 | */ |
| 426 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 427 | gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 428 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 429 | #ifdef PTMSI_ALLOC |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 430 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 431 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 432 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 433 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 434 | #endif |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 435 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 436 | /* Optional: MS-identity (combined attach) */ |
| 437 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 438 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 439 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 443 | static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause, |
| 444 | const struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 445 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 446 | struct gsm48_hdr *gh; |
| 447 | |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 448 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS ATTACH REJECT: %s\n", |
| 449 | get_value_string(gsm48_gmm_cause_names, gmm_cause)); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 450 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REJECTED]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 451 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 452 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 453 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 454 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 455 | gh->data[0] = gmm_cause; |
| 456 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 457 | return gsm48_gmm_sendmsg(msg, 0, NULL, false); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 458 | } |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 459 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 460 | uint8_t gmm_cause) |
| 461 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 462 | 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] | 463 | gmm_copy_id(msg, old_msg); |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 464 | return _tx_gmm_att_rej(msg, gmm_cause, NULL); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 465 | } |
| 466 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 467 | uint8_t gmm_cause) |
| 468 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 469 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT REJ"); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 470 | mmctx2msgid(msg, mm); |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 471 | return _tx_gmm_att_rej(msg, gmm_cause, mm); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 472 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 473 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 474 | /* Chapter 9.4.6.2 Detach accept */ |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 475 | static int _tx_detach_ack(struct msgb *msg, uint8_t force_stby, |
| 476 | struct sgsn_mm_ctx *mm) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 477 | { |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 478 | struct gsm48_hdr *gh; |
| 479 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 480 | /* MMCTX might be NULL! */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 481 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 482 | DEBUGP(DMM, "<- GPRS MM DETACH ACC (force-standby: %d)\n", force_stby); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 483 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_ACKED]); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 484 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 485 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 486 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 487 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 488 | gh->data[0] = force_stby; |
| 489 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 490 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 491 | } |
| 492 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 493 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
| 494 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 495 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACK"); |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 496 | |
| 497 | mmctx2msgid(msg, mm); |
| 498 | return _tx_detach_ack(msg, force_stby, mm); |
| 499 | } |
| 500 | |
| 501 | static int gsm48_tx_gmm_det_ack_oldmsg(struct msgb *oldmsg, uint8_t force_stby) |
| 502 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 503 | 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] | 504 | |
| 505 | gmm_copy_id(msg, oldmsg); |
| 506 | return _tx_detach_ack(msg, force_stby, NULL); |
| 507 | } |
| 508 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 509 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 510 | 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] | 511 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 512 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ID REQ"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 513 | struct gsm48_hdr *gh; |
| 514 | |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 515 | LOGMMCTXP(LOGL_DEBUG, mm, "<- GPRS IDENTITY REQUEST: mi_type=%s\n", |
| 516 | gsm48_mi_type_name(id_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 517 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 518 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 519 | |
| 520 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 521 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 522 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 523 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 524 | gh->data[0] = id_type & 0xf; |
| 525 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 526 | return gsm48_gmm_sendmsg(msg, 1, mm, false); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 527 | } |
| 528 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 529 | /* 3GPP TS 24.008 Section 9.4.9: Authentication and Ciphering Request */ |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 530 | 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] | 531 | uint8_t key_seq, bool force_standby) |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 532 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 533 | 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] | 534 | struct gsm48_hdr *gh; |
| 535 | struct gsm48_auth_ciph_req *acreq; |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 536 | uint8_t *m_rand, *m_cksn, rbyte; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 537 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 538 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS AUTH AND CIPHERING REQ (rand = %s)\n", |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 539 | osmo_hexdump(rnd, 16)); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 540 | |
| 541 | mmctx2msgid(msg, mm); |
| 542 | |
| 543 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 544 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 545 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; |
| 546 | |
| 547 | acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 548 | acreq->ciph_alg = mm->ciph_algo & 0xf; |
| 549 | /* § 10.5.5.10: */ |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 550 | acreq->imeisv_req = 0x1; |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 551 | /* § 10.5.5.7: */ |
| 552 | acreq->force_stby = force_standby; |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 553 | /* 3GPP TS 24.008 § 10.5.5.19: */ |
| 554 | if (RAND_bytes(&rbyte, 1) != 1) { |
| 555 | LOGP(DMM, LOGL_NOTICE, "RAND_bytes failed for A&C ref, falling " |
| 556 | "back to rand()\n"); |
| 557 | acreq->ac_ref_nr = rand(); |
| 558 | } else |
| 559 | acreq->ac_ref_nr = rbyte; |
| 560 | mm->ac_ref_nr_used = acreq->ac_ref_nr; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 561 | |
| 562 | /* Only if authentication is requested we need to set RAND + CKSN */ |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 563 | if (rnd) { |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 564 | m_rand = msgb_put(msg, 16+1); |
| 565 | m_rand[0] = GSM48_IE_GMM_AUTH_RAND; |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 566 | memcpy(m_rand + 1, rnd, 16); |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 567 | /* § 10.5.1.2: */ |
Jacob Erlbeck | 79dcaa4 | 2014-12-01 10:36:17 +0100 | [diff] [blame] | 568 | m_cksn = msgb_put(msg, 1); |
| 569 | m_cksn[0] = (GSM48_IE_GMM_CIPH_CKSN << 4) | (key_seq & 0x07); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 570 | } |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 571 | /* 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] | 572 | /* FIXME: make sure we don't send any other messages to the MS */ |
| 573 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 574 | return gsm48_gmm_sendmsg(msg, 1, mm, false); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | /* Section 9.4.11: Authentication and Ciphering Reject */ |
| 578 | static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) |
| 579 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 580 | 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] | 581 | struct gsm48_hdr *gh; |
| 582 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 583 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS AUTH AND CIPH REJECT\n"); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 584 | |
| 585 | mmctx2msgid(msg, mm); |
| 586 | |
| 587 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 588 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 589 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; |
| 590 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 591 | return gsm48_gmm_sendmsg(msg, 0, mm, false); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | /* Section 9.4.10: Authentication and Ciphering Response */ |
| 595 | static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, |
| 596 | struct msgb *msg) |
| 597 | { |
| 598 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 599 | struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; |
| 600 | struct tlv_parsed tp; |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 601 | struct gsm_auth_tuple *at; |
| 602 | int rc; |
| 603 | |
| 604 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH RESPONSE\n"); |
| 605 | |
| 606 | if (ctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 607 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 608 | "Unexpected Auth & Ciph Response (ignored)\n"); |
| 609 | return 0; |
| 610 | } |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 611 | |
Max | 9943d7a | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 612 | if (acr->ac_ref_nr != ctx->ac_ref_nr_used) { |
| 613 | LOGMMCTXP(LOGL_NOTICE, ctx, "Reference mismatch for Auth & Ciph" |
| 614 | " Response: %u received, %u expected\n", |
| 615 | acr->ac_ref_nr, ctx->ac_ref_nr_used); |
| 616 | return 0; |
| 617 | } |
| 618 | |
Jacob Erlbeck | 4d12767 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 619 | /* Stop T3360 */ |
| 620 | mmctx_timer_stop(ctx, 3360); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 621 | |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 622 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 623 | (msg->data + msg->len) - acr->data, 0, 0); |
| 624 | |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 625 | if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || |
| 626 | !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV)) { |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 627 | /* TODO: missing mandatory IE, return STATUS or REJ? */ |
| 628 | LOGMMCTXP(LOGL_ERROR, ctx, "Missing mandantory IE\n"); |
| 629 | return -EINVAL; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 630 | } |
| 631 | |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 632 | /* Compare SRES with what we expected */ |
| 633 | LOGMMCTXP(LOGL_DEBUG, ctx, "checking received auth info, SRES = %s\n", |
| 634 | osmo_hexdump(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), |
| 635 | TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES))); |
| 636 | |
| 637 | at = &ctx->auth_triplet; |
| 638 | |
Harald Welte | 34ef4c5 | 2016-04-20 13:13:19 +0200 | [diff] [blame] | 639 | if (TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES) != sizeof(at->vec.sres) || |
| 640 | memcmp(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), at->vec.sres, |
| 641 | sizeof(at->vec.sres)) != 0) { |
Jacob Erlbeck | c9cb9b0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 642 | |
| 643 | LOGMMCTXP(LOGL_NOTICE, ctx, "Received SRES doesn't match\n"); |
| 644 | rc = gsm48_tx_gmm_auth_ciph_rej(ctx); |
| 645 | mm_ctx_cleanup_free(ctx, "GPRS AUTH AND CIPH REJECT"); |
| 646 | return rc; |
| 647 | } |
| 648 | |
| 649 | ctx->is_authenticated = 1; |
| 650 | |
Daniel Willmann | 522fee8 | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 651 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu) |
| 652 | ctx->iu.new_key = 1; |
| 653 | |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 654 | /* FIXME: enable LLC cipheirng */ |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 655 | |
| 656 | /* Check if we can let the mobile station enter */ |
| 657 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 658 | } |
| 659 | |
Holger Hans Peter Freyther | a9f671c | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 660 | static void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx) |
| 661 | { |
| 662 | struct gsm_mncc_number called; |
| 663 | uint8_t msisdn[sizeof(ctx->subscr->sgsn_data->msisdn) + 1]; |
| 664 | |
| 665 | /* Convert MSISDN from encoded to string.. */ |
| 666 | if (!ctx->subscr) |
| 667 | return; |
| 668 | |
| 669 | if (ctx->subscr->sgsn_data->msisdn_len < 1) |
| 670 | return; |
| 671 | |
| 672 | /* prepare the data for the decoder */ |
| 673 | memset(&called, 0, sizeof(called)); |
| 674 | msisdn[0] = ctx->subscr->sgsn_data->msisdn_len; |
| 675 | memcpy(&msisdn[1], ctx->subscr->sgsn_data->msisdn, |
| 676 | ctx->subscr->sgsn_data->msisdn_len); |
| 677 | |
| 678 | /* decode the string now */ |
| 679 | gsm48_decode_called(&called, msisdn); |
| 680 | |
| 681 | /* Prepend a '+' for international numbers */ |
| 682 | if (called.plan == 1 && called.type == 1) { |
| 683 | ctx->msisdn[0] = '+'; |
| 684 | strncpy(&ctx->msisdn[1], called.number, |
| 685 | sizeof(ctx->msisdn) - 1); |
| 686 | } else { |
| 687 | strncpy(&ctx->msisdn[0], called.number, |
| 688 | sizeof(ctx->msisdn) - 1); |
| 689 | } |
| 690 | } |
| 691 | |
Holger Hans Peter Freyther | 8b2b5fb | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 692 | static void extract_subscr_hlr(struct sgsn_mm_ctx *ctx) |
| 693 | { |
| 694 | struct gsm_mncc_number called; |
| 695 | uint8_t hlr_number[sizeof(ctx->subscr->sgsn_data->hlr) + 1]; |
| 696 | |
| 697 | if (!ctx->subscr) |
| 698 | return; |
| 699 | |
| 700 | if (ctx->subscr->sgsn_data->hlr_len < 1) |
| 701 | return; |
| 702 | |
| 703 | /* prepare the data for the decoder */ |
| 704 | memset(&called, 0, sizeof(called)); |
| 705 | hlr_number[0] = ctx->subscr->sgsn_data->hlr_len; |
| 706 | memcpy(&hlr_number[1], ctx->subscr->sgsn_data->hlr, |
| 707 | ctx->subscr->sgsn_data->hlr_len); |
| 708 | |
| 709 | /* decode the string now */ |
| 710 | gsm48_decode_called(&called, hlr_number); |
| 711 | |
| 712 | if (called.plan != 1) { |
| 713 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 714 | "Numbering plan(%d) not allowed\n", |
| 715 | called.plan); |
| 716 | return; |
| 717 | } |
| 718 | |
| 719 | if (called.type != 1) { |
| 720 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 721 | "Numbering type(%d) not allowed\n", |
| 722 | called.type); |
| 723 | return; |
| 724 | } |
| 725 | |
| 726 | strncpy(&ctx->hlr[0], called.number, sizeof(ctx->hlr) - 1); |
| 727 | } |
| 728 | |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 729 | #ifdef BUILD_IU |
| 730 | /* Chapter 9.4.21: Service accept */ |
| 731 | static int gsm48_tx_gmm_service_ack(struct sgsn_mm_ctx *mm) |
| 732 | { |
| 733 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE ACK"); |
| 734 | struct gsm48_hdr *gh; |
| 735 | |
| 736 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS SERVICE ACCEPT (P-TMSI=0x%08x)\n", mm->p_tmsi); |
| 737 | |
| 738 | mmctx2msgid(msg, mm); |
| 739 | |
| 740 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 741 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 742 | gh->msg_type = GSM48_MT_GMM_SERVICE_ACK; |
| 743 | |
| 744 | /* Optional: PDP context status */ |
| 745 | /* Optional: MBMS context status */ |
| 746 | |
| 747 | return gsm48_gmm_sendmsg(msg, 0, mm, false); |
| 748 | } |
| 749 | #endif |
| 750 | |
| 751 | /* Chapter 9.4.22: Service reject */ |
| 752 | static int _tx_gmm_service_rej(struct msgb *msg, uint8_t gmm_cause, |
| 753 | const struct sgsn_mm_ctx *mm) |
| 754 | { |
| 755 | struct gsm48_hdr *gh; |
| 756 | |
| 757 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS SERVICE REJECT: %s\n", |
| 758 | get_value_string(gsm48_gmm_cause_names, gmm_cause)); |
| 759 | |
| 760 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 761 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 762 | gh->msg_type = GSM48_MT_GMM_SERVICE_REJ; |
| 763 | gh->data[0] = gmm_cause; |
| 764 | |
| 765 | return gsm48_gmm_sendmsg(msg, 0, NULL, true); |
| 766 | } |
| 767 | static int gsm48_tx_gmm_service_rej_oldmsg(const struct msgb *old_msg, |
| 768 | uint8_t gmm_cause) |
| 769 | { |
| 770 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE REJ OLD"); |
| 771 | gmm_copy_id(msg, old_msg); |
| 772 | return _tx_gmm_service_rej(msg, gmm_cause, NULL); |
| 773 | } |
| 774 | #if 0 |
| 775 | -- currently unused -- |
| 776 | static int gsm48_tx_gmm_service_rej(struct sgsn_mm_ctx *mm, |
| 777 | uint8_t gmm_cause) |
| 778 | { |
| 779 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE REJ"); |
| 780 | mmctx2msgid(msg, mm); |
| 781 | return _tx_gmm_service_rej(msg, gmm_cause, mm); |
| 782 | } |
| 783 | #endif |
| 784 | |
| 785 | static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm); |
| 786 | |
| 787 | #ifdef BUILD_IU |
| 788 | void activate_pdp_rabs(struct sgsn_mm_ctx *ctx) |
| 789 | { |
| 790 | /* Send RAB activation requests for all PDP contexts */ |
| 791 | struct sgsn_pdp_ctx *pdp; |
| 792 | llist_for_each_entry(pdp, &ctx->pdp_list, list) { |
| 793 | iu_rab_act_ps(pdp->nsapi, pdp, 1); |
| 794 | } |
| 795 | } |
| 796 | #endif |
| 797 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 798 | /* Check if we can already authorize a subscriber */ |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 799 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 800 | { |
Daniel Willmann | 522fee8 | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 801 | #ifdef BUILD_IU |
| 802 | int rc; |
| 803 | #endif |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 804 | #ifndef PTMSI_ALLOC |
| 805 | struct sgsn_signal_data sig_data; |
| 806 | #endif |
| 807 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 808 | /* Request IMSI and IMEI from the MS if they are unknown */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 809 | if (!strlen(ctx->imei)) { |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 810 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 811 | mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 812 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 813 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 814 | if (!strlen(ctx->imsi)) { |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 815 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 816 | mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 817 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 818 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 819 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 820 | /* All information required for authentication is available */ |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 821 | ctx->t3370_id_type = GSM_MI_TYPE_NONE; |
| 822 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 823 | if (ctx->auth_state == SGSN_AUTH_UNKNOWN) { |
| 824 | /* Request authorization, this leads to a call to |
Jacob Erlbeck | 802d78a | 2014-11-07 14:17:44 +0100 | [diff] [blame] | 825 | * sgsn_auth_update which in turn calls |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 826 | * gsm0408_gprs_access_granted or gsm0408_gprs_access_denied */ |
| 827 | |
Jacob Erlbeck | b2acd74 | 2014-11-13 10:48:39 +0100 | [diff] [blame] | 828 | sgsn_auth_request(ctx); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 829 | /* Note that gsm48_gmm_authorize can be called recursively via |
| 830 | * sgsn_auth_request iff ctx->auth_info changes to AUTH_ACCEPTED |
| 831 | */ |
| 832 | return 0; |
| 833 | } |
| 834 | |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 835 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && !ctx->is_authenticated) { |
| 836 | struct gsm_auth_tuple *at = &ctx->auth_triplet; |
| 837 | |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 838 | mmctx_timer_start(ctx, 3360, sgsn->cfg.timers.T3360); |
Harald Welte | 34ef4c5 | 2016-04-20 13:13:19 +0200 | [diff] [blame] | 839 | return gsm48_tx_gmm_auth_ciph_req(ctx, at->vec.rand, |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 840 | at->key_seq, false); |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && ctx->is_authenticated && |
| 844 | ctx->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { |
| 845 | /* Check again for authorization */ |
| 846 | sgsn_auth_request(ctx); |
| 847 | return 0; |
| 848 | } |
| 849 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 850 | if (ctx->auth_state != SGSN_AUTH_ACCEPTED) { |
| 851 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 852 | "authorization is denied, aborting procedure\n"); |
| 853 | return -EACCES; |
Jacob Erlbeck | 79d438a | 2014-10-29 22:12:20 +0100 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | /* The MS is authorized */ |
Daniel Willmann | 522fee8 | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 857 | #ifdef BUILD_IU |
| 858 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu && !ctx->iu.ue_ctx->integrity_active) { |
| 859 | rc = iu_tx_sec_mode_cmd(ctx->iu.ue_ctx, &ctx->auth_triplet, 0, ctx->iu.new_key); |
| 860 | ctx->iu.new_key = 0; |
| 861 | return rc; |
| 862 | } |
| 863 | #endif |
Jacob Erlbeck | 79d438a | 2014-10-29 22:12:20 +0100 | [diff] [blame] | 864 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 865 | switch (ctx->pending_req) { |
| 866 | case 0: |
| 867 | LOGMMCTXP(LOGL_INFO, ctx, |
| 868 | "no pending request, authorization completed\n"); |
| 869 | break; |
| 870 | case GSM48_MT_GMM_ATTACH_REQ: |
Daniel Willmann | 68ce9e3 | 2016-05-21 00:21:15 +0200 | [diff] [blame] | 871 | ctx->pending_req = 0; |
Holger Hans Peter Freyther | a9f671c | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 872 | |
| 873 | extract_subscr_msisdn(ctx); |
Holger Hans Peter Freyther | 8b2b5fb | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 874 | extract_subscr_hlr(ctx); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 875 | #ifdef PTMSI_ALLOC |
| 876 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 877 | mmctx_timer_start(ctx, 3350, sgsn->cfg.timers.T3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 878 | ctx->t3350_mode = GMM_T3350_MODE_ATT; |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 879 | #else |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 880 | memset(&sig_data, 0, sizeof(sig_data)); |
| 881 | sig_data.mm = mmctx; |
| 882 | osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 883 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 884 | #endif |
| 885 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 886 | return gsm48_tx_gmm_att_ack(ctx); |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 887 | #ifdef BUILD_IU |
| 888 | case GSM48_MT_GMM_SERVICE_REQ: |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 889 | ctx->pending_req = 0; |
Daniel Willmann | e986183 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 890 | mmctx_set_pmm_state(ctx, PMM_CONNECTED); |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 891 | rc = gsm48_tx_gmm_service_ack(ctx); |
| 892 | |
Daniel Willmann | e0181a2 | 2016-05-21 00:35:41 +0200 | [diff] [blame] | 893 | if (ctx->iu.service.type != GPRS_SERVICE_T_SIGNALLING) |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 894 | activate_pdp_rabs(ctx); |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 895 | |
| 896 | return rc; |
| 897 | #endif |
| 898 | case GSM48_MT_GMM_RA_UPD_REQ: |
| 899 | ctx->pending_req = 0; |
| 900 | /* Send RA UPDATE ACCEPT */ |
| 901 | return gsm48_tx_gmm_ra_upd_ack(ctx); |
| 902 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 903 | default: |
| 904 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 905 | "only Attach Request is supported yet, " |
| 906 | "got request type %u\n", ctx->pending_req); |
| 907 | break; |
| 908 | } |
| 909 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 910 | return 0; |
| 911 | } |
| 912 | |
Jacob Erlbeck | ac33698 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 913 | void gsm0408_gprs_authenticate(struct sgsn_mm_ctx *ctx) |
| 914 | { |
| 915 | ctx->is_authenticated = 0; |
| 916 | |
| 917 | gsm48_gmm_authorize(ctx); |
| 918 | } |
| 919 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 920 | void gsm0408_gprs_access_granted(struct sgsn_mm_ctx *ctx) |
| 921 | { |
| 922 | switch (ctx->mm_state) { |
| 923 | case GMM_COMMON_PROC_INIT: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 924 | LOGMMCTXP(LOGL_NOTICE, ctx, |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 925 | "Authorized, continuing procedure, IMSI=%s\n", |
| 926 | ctx->imsi); |
| 927 | /* Continue with the authorization */ |
| 928 | gsm48_gmm_authorize(ctx); |
| 929 | break; |
| 930 | default: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 931 | LOGMMCTXP(LOGL_INFO, ctx, |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 932 | "Authorized, ignored, IMSI=%s\n", |
| 933 | ctx->imsi); |
| 934 | } |
| 935 | } |
| 936 | |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 937 | 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] | 938 | { |
Jacob Erlbeck | f96779f | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 939 | if (gmm_cause == SGSN_ERROR_CAUSE_NONE) |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 940 | gmm_cause = GMM_CAUSE_GPRS_NOTALLOWED; |
| 941 | |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 942 | switch (ctx->mm_state) { |
| 943 | case GMM_COMMON_PROC_INIT: |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 944 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 945 | "Not authorized, rejecting ATTACH REQUEST " |
| 946 | "with cause '%s' (%d)\n", |
| 947 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 948 | gmm_cause); |
| 949 | gsm48_tx_gmm_att_rej(ctx, gmm_cause); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 950 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJECT"); |
| 951 | break; |
| 952 | case GMM_REGISTERED_NORMAL: |
| 953 | case GMM_REGISTERED_SUSPENDED: |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 954 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 955 | "Authorization lost, detaching " |
| 956 | "with cause '%s' (%d)\n", |
| 957 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 958 | gmm_cause); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 959 | gsm48_tx_gmm_detach_req( |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 960 | ctx, GPRS_DET_T_MT_REATT_NOTREQ, gmm_cause); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 961 | |
| 962 | mm_ctx_cleanup_free(ctx, "auth lost"); |
| 963 | break; |
| 964 | default: |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 965 | LOGMMCTXP(LOGL_INFO, ctx, |
| 966 | "Authorization lost, cause is '%s' (%d)\n", |
| 967 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 968 | gmm_cause); |
| 969 | mm_ctx_cleanup_free(ctx, "auth lost"); |
Jacob Erlbeck | c64af7a | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 970 | } |
| 971 | } |
| 972 | |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 973 | 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] | 974 | { |
Jacob Erlbeck | f96779f | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 975 | if (gmm_cause != SGSN_ERROR_CAUSE_NONE) { |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 976 | LOGMMCTXP(LOGL_INFO, ctx, |
| 977 | "Cancelled with cause '%s' (%d), deleting context\n", |
| 978 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 979 | gmm_cause); |
| 980 | gsm0408_gprs_access_denied(ctx, gmm_cause); |
| 981 | return; |
Jacob Erlbeck | bf0b874 | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 982 | } |
Jacob Erlbeck | 4101008 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 983 | |
| 984 | LOGMMCTXP(LOGL_INFO, ctx, "Cancelled, deleting context silently\n"); |
Jacob Erlbeck | bf0b874 | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 985 | mm_ctx_cleanup_free(ctx, "access cancelled"); |
| 986 | } |
| 987 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 988 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 989 | 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] | 990 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 991 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 992 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 993 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 994 | |
| 995 | 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] | 996 | if (!ctx) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 997 | 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] | 998 | return -EINVAL; |
| 999 | } |
| 1000 | |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1001 | LOGMMCTXP(LOGL_DEBUG, ctx, "-> GMM IDENTITY RESPONSE: MI(%s)=%s\n", |
| 1002 | gsm48_mi_type_name(mi_type), mi_string); |
Daniel Willmann | 09827d5 | 2014-09-23 18:48:44 +0200 | [diff] [blame] | 1003 | |
Jacob Erlbeck | 5233c0c | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 1004 | if (ctx->t3370_id_type == GSM_MI_TYPE_NONE) { |
| 1005 | LOGMMCTXP(LOGL_NOTICE, ctx, |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1006 | "Got unexpected IDENTITY RESPONSE: MI(%s)=%s, " |
Jacob Erlbeck | 5233c0c | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 1007 | "ignoring message\n", |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1008 | gsm48_mi_type_name(mi_type), mi_string); |
Jacob Erlbeck | 5233c0c | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 1009 | return -EINVAL; |
| 1010 | } |
| 1011 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1012 | if (mi_type == ctx->t3370_id_type) |
| 1013 | mmctx_timer_stop(ctx, 3370); |
| 1014 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1015 | switch (mi_type) { |
| 1016 | case GSM_MI_TYPE_IMSI: |
| 1017 | /* we already have a mm context with current TLLI, but no |
| 1018 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 1019 | * this initial context with data from the HLR */ |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 1020 | if (strlen(ctx->imsi) == 0) { |
| 1021 | /* Check if we already have a MM context for this IMSI */ |
| 1022 | struct sgsn_mm_ctx *ictx; |
| 1023 | ictx = sgsn_mm_ctx_by_imsi(mi_string); |
| 1024 | if (ictx) { |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 1025 | /* Handle it like in gsm48_rx_gmm_det_req, |
| 1026 | * except that no messages are sent to the BSS */ |
| 1027 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1028 | LOGMMCTXP(LOGL_NOTICE, ctx, "Deleting old MM Context for same IMSI " |
| 1029 | "p_tmsi_old=0x%08x\n", |
| 1030 | ictx->p_tmsi); |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 1031 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 1032 | mm_ctx_cleanup_free(ictx, "GPRS IMSI re-use"); |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 1033 | } |
| 1034 | } |
Jacob Erlbeck | b485ee9 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 1035 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi) - 1); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1036 | break; |
| 1037 | case GSM_MI_TYPE_IMEI: |
Jacob Erlbeck | b485ee9 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 1038 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei) - 1); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1039 | break; |
| 1040 | case GSM_MI_TYPE_IMEISV: |
| 1041 | break; |
| 1042 | } |
| 1043 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1044 | /* Check if we can let the mobile station enter */ |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1045 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | /* Section 9.4.1 Attach request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1049 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 1050 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1051 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1052 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1053 | uint8_t *cur = gh->data, *msnc, *mi, *ms_ra_acc_cap; |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1054 | 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] | 1055 | uint16_t drx_par; |
| 1056 | uint32_t tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1057 | char mi_string[GSM48_MI_SIZE]; |
| 1058 | struct gprs_ra_id ra_id; |
Daniel Willmann | 63dddc7 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1059 | uint16_t cid = 0; |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1060 | enum gsm48_gmm_cause reject_cause; |
| 1061 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1062 | |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 1063 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM ATTACH REQUEST "); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1064 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REQUEST]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1065 | |
| 1066 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 1067 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 1068 | * or with random TLLI. */ |
| 1069 | |
Daniel Willmann | 63dddc7 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1070 | /* In Iu mode, msg->dst contains the ue_conn_ctx pointer, in Gb mode |
| 1071 | * dst is empty. */ |
| 1072 | /* FIXME: have a more explicit indicator for Iu messages */ |
| 1073 | if (!msg->dst) { |
| 1074 | /* Gb mode */ |
| 1075 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Neels Hofmeyr | 0915612 | 2016-11-26 13:37:55 +0100 | [diff] [blame] | 1076 | } else |
| 1077 | ra_id = ((struct ue_conn_ctx*)msg->dst)->ra_id; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1078 | |
| 1079 | /* MS network capability 10.5.5.12 */ |
| 1080 | msnc_len = *cur++; |
| 1081 | msnc = cur; |
Alexander Chemeris | 6824c50 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 1082 | if (msnc_len > sizeof(ctx->ms_network_capa.buf)) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1083 | goto err_inval; |
| 1084 | cur += msnc_len; |
| 1085 | |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1086 | /* TODO: In iu mode - handle follow-on request */ |
| 1087 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1088 | /* aTTACH Type 10.5.5.2 */ |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1089 | att_type = *cur++ & 0x07; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1090 | |
| 1091 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1092 | drx_par = *cur++ << 8; |
| 1093 | drx_par |= *cur++; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1094 | |
| 1095 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 1096 | mi_len = *cur++; |
| 1097 | mi = cur; |
| 1098 | if (mi_len > 8) |
| 1099 | goto err_inval; |
| 1100 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 1101 | cur += mi_len; |
| 1102 | |
| 1103 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 1104 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1105 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 1106 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1107 | |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1108 | /* Old routing area identification 10.5.5.15. Skip it */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1109 | cur += 6; |
| 1110 | |
| 1111 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1112 | ms_ra_acc_cap_len = *cur++; |
| 1113 | ms_ra_acc_cap = cur; |
Alexander Chemeris | 6824c50 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 1114 | 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] | 1115 | goto err_inval; |
Harald Welte | 45ca552 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1116 | cur += ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1117 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1118 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 1119 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1120 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 1121 | |
| 1122 | switch (mi_type) { |
| 1123 | case GSM_MI_TYPE_IMSI: |
| 1124 | /* Try to find MM context based on IMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1125 | if (!ctx) |
| 1126 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1127 | if (!ctx) { |
| 1128 | #if 0 |
| 1129 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 1130 | #else |
Daniel Willmann | 63dddc7 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1131 | if (msg->dst) |
| 1132 | ctx = sgsn_mm_ctx_alloc_iu(msg->dst); |
| 1133 | else |
| 1134 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1135 | if (!ctx) { |
| 1136 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 1137 | goto rejected; |
| 1138 | } |
Jacob Erlbeck | b485ee9 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 1139 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi) - 1); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1140 | #endif |
| 1141 | } |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1142 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1143 | ctx->gb.tlli = msgb_tlli(msg); |
| 1144 | ctx->gb.llme = llme; |
| 1145 | } |
Harald Welte | 5c23bfc | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 1146 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1147 | break; |
| 1148 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1149 | memcpy(&tmsi, mi+1, 4); |
| 1150 | tmsi = ntohl(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1151 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1152 | if (!ctx) |
| 1153 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1154 | if (!ctx) { |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 1155 | /* Allocate a context as most of our code expects one. |
| 1156 | * Context will not have an IMSI ultil ID RESP is received */ |
Daniel Willmann | 63dddc7 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1157 | if (msg->dst) |
| 1158 | ctx = sgsn_mm_ctx_alloc_iu(msg->dst); |
| 1159 | else |
| 1160 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1161 | ctx->p_tmsi = tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1162 | } |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1163 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1164 | ctx->gb.tlli = msgb_tlli(msg); |
| 1165 | ctx->gb.llme = llme; |
| 1166 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1167 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1168 | break; |
| 1169 | default: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 1170 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with " |
Harald Welte | 7e3e933 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1171 | "MI type %s\n", gsm48_mi_type_name(mi_type)); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1172 | reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; |
| 1173 | goto rejected; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1174 | } |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1175 | /* Update MM Context with currient RA and Cell ID */ |
| 1176 | ctx->ra = ra_id; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1177 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) |
| 1178 | ctx->gb.cell_id = cid; |
Daniel Willmann | c3eb6a3 | 2016-05-21 00:31:12 +0200 | [diff] [blame] | 1179 | else if (ctx->ran_type == MM_CTX_T_UTRAN_Iu) { |
| 1180 | /* DEVELOPMENT HACK: Our current HLR does not support 3G |
| 1181 | * authentication tokens. A new HLR/VLR implementation is being |
| 1182 | * developed. Until it is ready and actual milenage |
| 1183 | * authentication is properly supported, we are hardcoding a |
| 1184 | * fixed Ki and use 2G auth. */ |
| 1185 | unsigned char tmp_rand[16]; |
| 1186 | /* Ki 000102030405060708090a0b0c0d0e0f */ |
| 1187 | struct osmo_sub_auth_data auth = { |
| 1188 | .type = OSMO_AUTH_TYPE_GSM, |
| 1189 | .algo = OSMO_AUTH_ALG_COMP128v1, |
| 1190 | .u.gsm.ki = { |
| 1191 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, |
| 1192 | 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, |
| 1193 | 0x0e, 0x0f |
| 1194 | }, |
| 1195 | }; |
| 1196 | /* XXX: Hack to make 3G auth work with special SIM card */ |
| 1197 | ctx->auth_state = SGSN_AUTH_AUTHENTICATE; |
| 1198 | |
| 1199 | RAND_bytes(tmp_rand, 16); |
| 1200 | |
| 1201 | memset(&ctx->auth_triplet.vec, 0, sizeof(ctx->auth_triplet.vec)); |
| 1202 | osmo_auth_gen_vec(&ctx->auth_triplet.vec, &auth, tmp_rand); |
| 1203 | |
| 1204 | ctx->auth_triplet.key_seq = 0; |
| 1205 | } |
| 1206 | |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1207 | /* Update MM Context with other data */ |
| 1208 | ctx->drx_parms = drx_par; |
Alexander Chemeris | 6824c50 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 1209 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
Harald Welte | 45ca552 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1210 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, |
| 1211 | ctx->ms_radio_access_capa.len); |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1212 | ctx->ms_network_capa.len = msnc_len; |
| 1213 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 1214 | if (!gprs_ms_net_cap_gea_supported(ctx->ms_network_capa.buf, msnc_len, |
| 1215 | ctx->ciph_algo)) { |
| 1216 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1217 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with MI " |
| 1218 | "type %s because MS do not support required %s " |
| 1219 | "encryption\n", gsm48_mi_type_name(mi_type), |
| 1220 | get_value_string(gprs_cipher_names,ctx->ciph_algo)); |
| 1221 | goto rejected; |
| 1222 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1223 | #ifdef PTMSI_ALLOC |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1224 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Jacob Erlbeck | e06476a | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 1225 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 1226 | if (ctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 1227 | ctx->p_tmsi_old = ctx->p_tmsi; |
| 1228 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 1229 | } |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1230 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1231 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1232 | |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1233 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1234 | /* Even if there is no P-TMSI allocated, the MS will |
| 1235 | * switch from foreign TLLI to local TLLI */ |
| 1236 | ctx->gb.tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 1237 | |
| 1238 | /* Inform LLC layer about new TLLI but keep old active */ |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1239 | if (ctx->is_authenticated) |
| 1240 | gprs_llme_copy_key(ctx, ctx->gb.llme); |
| 1241 | |
| 1242 | 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] | 1243 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1244 | |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1245 | ctx->pending_req = GSM48_MT_GMM_ATTACH_REQ; |
| 1246 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1247 | |
| 1248 | err_inval: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1249 | LOGPC(DMM, LOGL_INFO, "\n"); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1250 | reject_cause = GMM_CAUSE_SEM_INCORR_MSG; |
| 1251 | |
| 1252 | rejected: |
| 1253 | /* Send ATTACH REJECT */ |
| 1254 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1255 | "Rejecting Attach Request with cause '%s' (%d)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1256 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1257 | rc = gsm48_tx_gmm_att_rej_oldmsg(msg, reject_cause); |
| 1258 | if (ctx) |
| 1259 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJ"); |
| 1260 | else |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1261 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1262 | |
| 1263 | return rc; |
| 1264 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1265 | } |
| 1266 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1267 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1268 | 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] | 1269 | { |
| 1270 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1271 | uint8_t detach_type, power_off; |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1272 | int rc = 0; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1273 | |
| 1274 | detach_type = gh->data[0] & 0x7; |
| 1275 | power_off = gh->data[0] & 0x8; |
| 1276 | |
| 1277 | /* 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] | 1278 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_REQUEST]); |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1279 | 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] | 1280 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 1281 | power_off ? "Power-off" : ""); |
| 1282 | |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1283 | /* Only send the Detach Accept (MO) if power off isn't indicated, |
Jacob Erlbeck | 97ee376 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1284 | * see 04.08, 4.7.4.1.2/3 for details */ |
| 1285 | if (!power_off) { |
| 1286 | /* force_stby = 0 */ |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1287 | if (ctx) |
| 1288 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 1289 | else |
| 1290 | rc = gsm48_tx_gmm_det_ack_oldmsg(msg, 0); |
Jacob Erlbeck | 97ee376 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1291 | } |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1292 | |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1293 | if (ctx) { |
| 1294 | struct sgsn_signal_data sig_data; |
| 1295 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1296 | sig_data.mm = ctx; |
| 1297 | osmo_signal_dispatch(SS_SGSN, S_SGSN_DETACH, &sig_data); |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1298 | mm_ctx_cleanup_free(ctx, "GPRS DETACH REQUEST"); |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1299 | } |
Jacob Erlbeck | 12396bd | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 1300 | |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1301 | return rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1302 | } |
| 1303 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1304 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1305 | 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] | 1306 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1307 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 UPD ACK"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1308 | struct gsm48_hdr *gh; |
| 1309 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1310 | uint8_t *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1311 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1312 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_ACKED]); |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1313 | LOGMMCTXP(LOGL_INFO, mm, "<- ROUTING AREA UPDATE ACCEPT\n"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1314 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1315 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1316 | |
| 1317 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1318 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1319 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 1320 | |
| 1321 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 1322 | rua->force_stby = 0; /* not indicated */ |
| 1323 | rua->upd_result = 0; /* RA updated */ |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1324 | 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] | 1325 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1326 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1327 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1328 | #if 0 |
| 1329 | /* Optional: P-TMSI signature */ |
| 1330 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 1331 | ptsig = msgb_put(msg, 3); |
| 1332 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 1333 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 1334 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 1335 | #endif |
| 1336 | |
| 1337 | #ifdef PTMSI_ALLOC |
| 1338 | /* Optional: Allocated P-TMSI */ |
| 1339 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 1340 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 1341 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 1342 | #endif |
| 1343 | |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 1344 | /* Optional: Negotiated READY timer value */ |
| 1345 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1346 | gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); |
Jacob Erlbeck | 1063ae0 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 1347 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1348 | /* Option: MS ID, ... */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1349 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1350 | } |
| 1351 | |
| 1352 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1353 | 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] | 1354 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1355 | 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] | 1356 | struct gsm48_hdr *gh; |
| 1357 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1358 | LOGP(DMM, LOGL_NOTICE, "<- ROUTING AREA UPDATE REJECT\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1359 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REJECT]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1360 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1361 | gmm_copy_id(msg, old_msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1362 | |
| 1363 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 1364 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1365 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 1366 | gh->data[0] = cause; |
| 1367 | gh->data[1] = 0; /* ? */ |
| 1368 | |
| 1369 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1370 | return gsm48_gmm_sendmsg(msg, 0, NULL, false); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1371 | } |
| 1372 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1373 | 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] | 1374 | const uint8_t *pdp_status) |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1375 | { |
| 1376 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 1377 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 1378 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 1379 | * shall deactivate all those PDP contexts locally (without peer to |
| 1380 | * peer signalling between the MS and the network), which are not in SM |
| 1381 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 1382 | * being in state PDP-INACTIVE. */ |
| 1383 | |
| 1384 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
Harald Welte | 9e7093c | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1385 | if (pdp->nsapi < 8) { |
| 1386 | if (!(pdp_status[0] & (1 << pdp->nsapi))) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1387 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | 9e7093c | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1388 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1389 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1390 | sgsn_delete_pdp_ctx(pdp); |
| 1391 | } |
| 1392 | } else { |
| 1393 | if (!(pdp_status[1] & (1 << (pdp->nsapi - 8)))) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1394 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | 9e7093c | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1395 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1396 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1397 | sgsn_delete_pdp_ctx(pdp); |
| 1398 | } |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1399 | } |
| 1400 | } |
| 1401 | } |
| 1402 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1403 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1404 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1405 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1406 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1407 | #ifndef PTMSI_ALLOC |
| 1408 | struct sgsn_signal_data sig_data; |
| 1409 | #endif |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1410 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1411 | uint8_t *cur = gh->data; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1412 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1413 | struct gprs_ra_id old_ra_id; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1414 | struct tlv_parsed tp; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1415 | uint8_t upd_type; |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1416 | enum gsm48_gmm_cause reject_cause; |
| 1417 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1418 | |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1419 | /* TODO: In iu mode - handle follow-on request */ |
| 1420 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1421 | /* Update Type 10.5.5.18 */ |
Daniel Willmann | 4b4ecb9 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1422 | upd_type = *cur++ & 0x07; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1423 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1424 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REQUEST]); |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1425 | LOGP(DMM, LOGL_INFO, "-> GMM RA UPDATE REQUEST type=\"%s\"\n", |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1426 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1427 | |
| 1428 | /* Old routing area identification 10.5.5.15 */ |
| 1429 | gsm48_parse_ra(&old_ra_id, cur); |
| 1430 | cur += 6; |
| 1431 | |
| 1432 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1433 | ms_ra_acc_cap_len = *cur++; |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1434 | if (ms_ra_acc_cap_len > 52) { |
| 1435 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1436 | goto rejected; |
| 1437 | } |
Harald Welte | 45ca552 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1438 | cur += ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1439 | |
| 1440 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 1441 | * DRX parameter, MS network capability */ |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1442 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1443 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1444 | |
| 1445 | switch (upd_type) { |
| 1446 | case GPRS_UPD_T_RA_LA: |
| 1447 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1448 | 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] | 1449 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1450 | goto rejected; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1451 | case GPRS_UPD_T_RA: |
| 1452 | case GPRS_UPD_T_PERIODIC: |
| 1453 | break; |
| 1454 | } |
| 1455 | |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1456 | if (!mmctx) { |
| 1457 | /* BSSGP doesn't give us an mmctx */ |
| 1458 | |
| 1459 | /* TODO: Check if there is an MM CTX with old_ra_id and |
| 1460 | * the P-TMSI (if given, reguired for UMTS) or as last resort |
| 1461 | * if the TLLI matches foreign_tlli (P-TMSI). Note that this |
| 1462 | * is an optimization to avoid the RA reject (impl detached) |
| 1463 | * below, which will cause a new attach cycle. */ |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1464 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Daniel Willmann | 63dddc7 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1465 | /* In Iu mode, msg->dst contains the ue_conn_ctx pointer, in Gb |
| 1466 | * mode dst is empty. */ |
| 1467 | /* FIXME: have a more explicit indicator for Iu messages */ |
| 1468 | if (!msg->dst) { |
| 1469 | mmctx = sgsn_mm_ctx_by_tlli_and_ptmsi(msgb_tlli(msg), &old_ra_id); |
| 1470 | } else if (TLVP_PRESENT(&tp, GSM48_IE_GMM_ALLOC_PTMSI)) { |
| 1471 | #ifdef BUILD_IU |
| 1472 | /* In Iu mode search only for ptmsi */ |
| 1473 | char mi_string[GSM48_MI_SIZE]; |
| 1474 | uint8_t mi_len = TLVP_LEN(&tp, GSM48_IE_GMM_ALLOC_PTMSI); |
| 1475 | uint8_t *mi = TLVP_VAL(&tp, GSM48_IE_GMM_ALLOC_PTMSI); |
| 1476 | uint8_t mi_type = *mi & GSM_MI_TYPE_MASK; |
| 1477 | uint32_t tmsi; |
| 1478 | |
| 1479 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 1480 | |
| 1481 | if (mi_type == GSM_MI_TYPE_TMSI) { |
| 1482 | memcpy(&tmsi, mi+1, 4); |
| 1483 | tmsi = ntohl(tmsi); |
| 1484 | mmctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
| 1485 | } |
| 1486 | #else |
| 1487 | goto rejected; |
| 1488 | #endif |
| 1489 | } |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1490 | if (mmctx) { |
| 1491 | LOGMMCTXP(LOGL_INFO, mmctx, |
| 1492 | "Looked up by matching TLLI and P_TMSI. " |
| 1493 | "BSSGP TLLI: %08x, P-TMSI: %08x (%08x), " |
| 1494 | "TLLI: %08x (%08x), RA: %d-%d-%d-%d\n", |
| 1495 | msgb_tlli(msg), |
| 1496 | mmctx->p_tmsi, mmctx->p_tmsi_old, |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 1497 | mmctx->gb.tlli, mmctx->gb.tlli_new, |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1498 | mmctx->ra.mcc, mmctx->ra.mnc, |
| 1499 | mmctx->ra.lac, mmctx->ra.rac); |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1500 | |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1501 | mmctx->mm_state = GMM_COMMON_PROC_INIT; |
| 1502 | } |
| 1503 | } else if (!gprs_ra_id_equals(&mmctx->ra, &old_ra_id) || |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1504 | mmctx->mm_state == GMM_DEREGISTERED) |
| 1505 | { |
| 1506 | /* We cannot use the mmctx */ |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1507 | LOGMMCTXP(LOGL_INFO, mmctx, |
| 1508 | "The MM context cannot be used, RA: %d-%d-%d-%d\n", |
| 1509 | mmctx->ra.mcc, mmctx->ra.mnc, |
| 1510 | mmctx->ra.lac, mmctx->ra.rac); |
| 1511 | mmctx = NULL; |
| 1512 | } |
Jacob Erlbeck | e437e12 | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1513 | |
Jacob Erlbeck | 556aa91 | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1514 | if (!mmctx) { |
Harald Welte | 95de4d5 | 2015-12-25 22:31:36 +0100 | [diff] [blame] | 1515 | if (llme) { |
| 1516 | /* send a XID reset to re-set all LLC sequence numbers |
| 1517 | * in the MS */ |
| 1518 | LOGMMCTXP(LOGL_NOTICE, mmctx, "LLC XID RESET\n"); |
| 1519 | gprs_llgmm_reset(llme); |
| 1520 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1521 | /* The MS has to perform GPRS attach */ |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1522 | /* Device is still IMSI attached for CS but initiate GPRS ATTACH, |
| 1523 | * see GSM 04.08, 4.7.5.1.4 and G.6 */ |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1524 | reject_cause = GMM_CAUSE_IMPL_DETACHED; |
| 1525 | goto rejected; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1526 | } |
| 1527 | |
Harald Welte | 66d062a | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 1528 | /* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */ |
| 1529 | msgid2mmctx(mmctx, msg); |
| 1530 | /* Bump the statistics of received signalling msgs for this MM context */ |
| 1531 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 1532 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1533 | /* Update the MM context with the new RA-ID */ |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1534 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
Daniel Willmann | 711adc2 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 1535 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1536 | /* Update the MM context with the new (i.e. foreign) TLLI */ |
| 1537 | mmctx->gb.tlli = msgb_tlli(msg); |
| 1538 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1539 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 1540 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 1541 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1542 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 1543 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1544 | #ifdef PTMSI_ALLOC |
Jacob Erlbeck | e06476a | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 1545 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 1546 | if (mmctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 1547 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 1548 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 1549 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1550 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 1551 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1552 | mmctx_timer_start(mmctx, 3350, sgsn->cfg.timers.T3350); |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1553 | |
| 1554 | mmctx->mm_state = GMM_COMMON_PROC_INIT; |
| 1555 | #else |
| 1556 | /* Make sure we are NORMAL (i.e. not SUSPENDED anymore) */ |
| 1557 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1558 | |
| 1559 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1560 | sig_data.mm = mmctx; |
| 1561 | osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1562 | #endif |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1563 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1564 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 1565 | * foreign TLLI to local TLLI */ |
| 1566 | mmctx->gb.tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1567 | |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1568 | /* Inform LLC layer about new TLLI but keep old active */ |
| 1569 | gprs_llgmm_assign(mmctx->gb.llme, mmctx->gb.tlli, |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1570 | mmctx->gb.tlli_new); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1571 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1572 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1573 | /* Look at PDP Context Status IE and see if MS's view of |
| 1574 | * activated/deactivated NSAPIs agrees with our view */ |
| 1575 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1576 | 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] | 1577 | process_ms_ctx_status(mmctx, pdp_status); |
| 1578 | } |
| 1579 | |
Daniel Willmann | e0181a2 | 2016-05-21 00:35:41 +0200 | [diff] [blame] | 1580 | /* Send RA UPDATE ACCEPT. In Iu, the RA upd request can be called from |
| 1581 | * a new Iu connection, so we might need to re-authenticate the |
| 1582 | * connection as well as turn on integrity protection. */ |
| 1583 | mmctx->pending_req = GSM48_MT_GMM_RA_UPD_REQ; |
| 1584 | return gsm48_gmm_authorize(mmctx); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1585 | |
| 1586 | rejected: |
| 1587 | /* Send RA UPDATE REJECT */ |
| 1588 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 1589 | "Rejecting RA Update Request with cause '%s' (%d)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1590 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1591 | rc = gsm48_tx_gmm_ra_upd_rej(msg, reject_cause); |
| 1592 | if (mmctx) |
| 1593 | mm_ctx_cleanup_free(mmctx, "GPRS RA UPDATE REJ"); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1594 | else { |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1595 | if (llme) |
| 1596 | gprs_llgmm_unassign(llme); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1597 | } |
Jacob Erlbeck | 6f4bbd4 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1598 | |
| 1599 | return rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1600 | } |
| 1601 | |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1602 | /* 3GPP TS 24.008 Section 9.4.20 Service request. |
| 1603 | * In Iu, a UE in PMM-IDLE mode can use GSM48_MT_GMM_SERVICE_REQ to switch back |
| 1604 | * to PMM-CONNECTED mode. */ |
| 1605 | static int gsm48_rx_gmm_service_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
| 1606 | { |
| 1607 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 1608 | uint8_t *cur = gh->data, *mi; |
| 1609 | uint8_t ciph_seq_nr, service_type, mi_len, mi_type; |
| 1610 | uint32_t tmsi; |
| 1611 | struct tlv_parsed tp; |
| 1612 | char mi_string[GSM48_MI_SIZE]; |
| 1613 | enum gsm48_gmm_cause reject_cause; |
| 1614 | int rc; |
| 1615 | |
| 1616 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM SERVICE REQUEST "); |
| 1617 | |
| 1618 | /* This message is only valid in Iu mode */ |
| 1619 | if (!msg->dst) { |
| 1620 | LOGPC(DMM, LOGL_INFO, "Invalid if not in Iu mode\n"); |
| 1621 | return -1; |
| 1622 | } |
| 1623 | |
| 1624 | /* Skip Ciphering key sequence number 10.5.1.2 */ |
| 1625 | ciph_seq_nr = *cur & 0x07; |
| 1626 | |
| 1627 | /* Service type 10.5.5.20 */ |
| 1628 | service_type = (*cur++ >> 4) & 0x07; |
| 1629 | |
| 1630 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 1631 | mi_len = *cur++; |
| 1632 | mi = cur; |
| 1633 | if (mi_len > 8) |
| 1634 | goto err_inval; |
| 1635 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 1636 | cur += mi_len; |
| 1637 | |
| 1638 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 1639 | |
| 1640 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 1641 | get_value_string(gprs_service_t_strs, service_type)); |
| 1642 | |
| 1643 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 1644 | |
| 1645 | /* Optional: PDP context status, MBMS context status, Uplink data status, Device properties */ |
| 1646 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, (msg->data + msg->len) - cur, 0, 0); |
| 1647 | |
| 1648 | switch (mi_type) { |
| 1649 | case GSM_MI_TYPE_IMSI: |
| 1650 | /* Try to find MM context based on IMSI */ |
| 1651 | if (!ctx) |
| 1652 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
| 1653 | if (!ctx) { |
| 1654 | /* FIXME: We need to have a context for service request? */ |
| 1655 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 1656 | goto rejected; |
| 1657 | } |
| 1658 | msgid2mmctx(ctx, msg); |
| 1659 | break; |
| 1660 | case GSM_MI_TYPE_TMSI: |
| 1661 | memcpy(&tmsi, mi+1, 4); |
| 1662 | tmsi = ntohl(tmsi); |
| 1663 | /* Try to find MM context based on P-TMSI */ |
| 1664 | if (!ctx) |
| 1665 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
| 1666 | if (!ctx) { |
| 1667 | /* FIXME: We need to have a context for service request? */ |
| 1668 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 1669 | goto rejected; |
| 1670 | } |
| 1671 | msgid2mmctx(ctx, msg); |
| 1672 | break; |
| 1673 | default: |
| 1674 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting SERVICE REQUEST with " |
| 1675 | "MI type %s\n", gsm48_mi_type_name(mi_type)); |
| 1676 | reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; |
| 1677 | goto rejected; |
| 1678 | } |
| 1679 | |
| 1680 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 1681 | |
| 1682 | ctx->iu.service.type = service_type; |
| 1683 | |
| 1684 | /* TODO: Handle those only in case of accept? */ |
| 1685 | /* Look at PDP Context Status IE and see if MS's view of |
| 1686 | * activated/deactivated NSAPIs agrees with our view */ |
| 1687 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
| 1688 | const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); |
| 1689 | process_ms_ctx_status(ctx, pdp_status); |
| 1690 | } |
| 1691 | |
| 1692 | |
| 1693 | ctx->pending_req = GSM48_MT_GMM_SERVICE_REQ; |
| 1694 | return gsm48_gmm_authorize(ctx); |
| 1695 | |
| 1696 | err_inval: |
| 1697 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 1698 | reject_cause = GMM_CAUSE_SEM_INCORR_MSG; |
| 1699 | |
| 1700 | rejected: |
| 1701 | /* Send SERVICE REJECT */ |
| 1702 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1703 | "Rejecting Service Request with cause '%s' (%d)\n", |
| 1704 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
| 1705 | rc = gsm48_tx_gmm_service_rej_oldmsg(msg, reject_cause); |
| 1706 | |
| 1707 | return rc; |
| 1708 | |
| 1709 | } |
| 1710 | |
| 1711 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1712 | 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] | 1713 | { |
| 1714 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1715 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1716 | LOGMMCTXP(LOGL_INFO, mmctx, "-> GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1717 | get_value_string(gsm48_gmm_cause_names, gh->data[0])); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1718 | |
| 1719 | return 0; |
| 1720 | } |
| 1721 | |
| 1722 | /* GPRS Mobility Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1723 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1724 | struct gprs_llc_llme *llme, bool drop_cipherable) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1725 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1726 | struct sgsn_signal_data sig_data; |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1727 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1728 | int rc; |
| 1729 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1730 | /* MMCTX can be NULL when called */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1731 | if (drop_cipherable && gsm48_hdr_gmm_cipherable(gh)) { |
| 1732 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping cleartext GMM %s which " |
| 1733 | "is expected to be encrypted for TLLI 0x%08x\n", |
| 1734 | get_value_string(gprs_msgt_gmm_names, gh->msg_type), |
| 1735 | llme->tlli); |
| 1736 | return -EBADMSG; |
| 1737 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1738 | |
Harald Welte | 95de4d5 | 2015-12-25 22:31:36 +0100 | [diff] [blame] | 1739 | if (llme && !mmctx && |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1740 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1741 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1742 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1743 | /* 4.7.10 */ |
Jacob Erlbeck | b35ee6b | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1744 | if (gh->msg_type == GSM48_MT_GMM_STATUS) { |
| 1745 | /* TLLI unassignment */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1746 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1747 | return 0; |
Jacob Erlbeck | b35ee6b | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1748 | } |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1749 | |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1750 | /* Don't reply or establish a LLME on DETACH_ACK */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1751 | if (gh->msg_type == GSM48_MT_GMM_DETACH_ACK) |
| 1752 | return gprs_llgmm_unassign(llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1753 | |
Jacob Erlbeck | 218ed40 | 2014-11-11 08:55:13 +0100 | [diff] [blame] | 1754 | gprs_llgmm_reset(llme); |
| 1755 | |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1756 | /* Don't force it into re-attachment */ |
| 1757 | if (gh->msg_type == GSM48_MT_GMM_DETACH_REQ) { |
Jacob Erlbeck | 42d284f | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1758 | /* Handle Detach Request */ |
| 1759 | rc = gsm48_rx_gmm_det_req(NULL, msg); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1760 | |
| 1761 | /* TLLI unassignment */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1762 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1763 | return rc; |
| 1764 | } |
| 1765 | |
| 1766 | /* Force the MS to re-attach */ |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 1767 | rc = gsm0408_gprs_force_reattach_oldmsg(msg, llme); |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1768 | |
| 1769 | /* TLLI unassignment */ |
Max | a86f5c0 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1770 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1771 | return rc; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1772 | } |
| 1773 | |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1774 | /* |
| 1775 | * For a few messages, mmctx may be NULL. For most, we want to ensure a |
| 1776 | * non-NULL mmctx. At the same time, we want to keep the message |
| 1777 | * validity check intact, so that all message types appear in the |
| 1778 | * switch statement and the default case thus means "unknown message". |
| 1779 | * If we split the switch in two parts to check non-NULL halfway, the |
| 1780 | * unknown-message check breaks, or we'd need to duplicate the switch |
| 1781 | * cases in both parts. Just keep one large switch and add some gotos. |
| 1782 | */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1783 | switch (gh->msg_type) { |
| 1784 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1785 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1786 | break; |
| 1787 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1788 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1789 | break; |
Daniel Willmann | 65edec8 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1790 | case GSM48_MT_GMM_SERVICE_REQ: |
| 1791 | rc = gsm48_rx_gmm_service_req(mmctx, msg); |
| 1792 | break; |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1793 | /* For all the following types mmctx can not be NULL */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1794 | case GSM48_MT_GMM_ID_RESP: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1795 | if (!mmctx) |
| 1796 | goto null_mmctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1797 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1798 | break; |
| 1799 | case GSM48_MT_GMM_STATUS: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1800 | if (!mmctx) |
| 1801 | goto null_mmctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1802 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1803 | break; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1804 | case GSM48_MT_GMM_DETACH_REQ: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1805 | if (!mmctx) |
| 1806 | goto null_mmctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1807 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1808 | break; |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1809 | case GSM48_MT_GMM_DETACH_ACK: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1810 | if (!mmctx) |
| 1811 | goto null_mmctx; |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1812 | LOGMMCTXP(LOGL_INFO, mmctx, "-> DETACH ACK\n"); |
| 1813 | mm_ctx_cleanup_free(mmctx, "GPRS DETACH ACK"); |
| 1814 | rc = 0; |
| 1815 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1816 | case GSM48_MT_GMM_ATTACH_COMPL: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1817 | if (!mmctx) |
| 1818 | goto null_mmctx; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1819 | /* only in case SGSN offered new P-TMSI */ |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1820 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ATTACH COMPLETE\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1821 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1822 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1823 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1824 | mmctx->pending_req = 0; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1825 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1826 | /* Unassign the old TLLI */ |
| 1827 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1828 | gprs_llme_copy_key(mmctx, mmctx->gb.llme); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1829 | gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1830 | mmctx->gb.tlli_new); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1831 | } |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1832 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Daniel Willmann | e986183 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 1833 | mmctx_set_pmm_state(mmctx, PMM_CONNECTED); |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1834 | rc = 0; |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1835 | |
| 1836 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1837 | sig_data.mm = mmctx; |
| 1838 | osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1839 | break; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1840 | case GSM48_MT_GMM_RA_UPD_COMPL: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1841 | if (!mmctx) |
| 1842 | goto null_mmctx; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1843 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | b25510a | 2015-08-16 18:14:33 +0200 | [diff] [blame] | 1844 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ROUTING AREA UPDATE COMPLETE\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1845 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1846 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1847 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1848 | mmctx->pending_req = 0; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1849 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1850 | /* Unassign the old TLLI */ |
| 1851 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
Max | eb64e3f | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1852 | gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, |
| 1853 | mmctx->gb.tlli_new); |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1854 | } |
Jacob Erlbeck | 67318ef | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1855 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Daniel Willmann | e986183 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 1856 | mmctx_set_pmm_state(mmctx, PMM_CONNECTED); |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1857 | rc = 0; |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1858 | |
| 1859 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1860 | sig_data.mm = mmctx; |
| 1861 | osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1862 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1863 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1864 | if (!mmctx) |
| 1865 | goto null_mmctx; |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1866 | LOGMMCTXP(LOGL_INFO, mmctx, "-> PTMSI REALLLICATION COMPLETE\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1867 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1868 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1869 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1870 | mmctx->pending_req = 0; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1871 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1872 | /* Unassign the old TLLI */ |
| 1873 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
| 1874 | //gprs_llgmm_assign(mmctx->gb.llme, 0xffffffff, mmctx->gb.tlli_new, GPRS_ALGO_GEA0, NULL); |
| 1875 | } |
Holger Hans Peter Freyther | f01f18e | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1876 | rc = 0; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1877 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1878 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1879 | if (!mmctx) |
| 1880 | goto null_mmctx; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1881 | rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1882 | break; |
| 1883 | default: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1884 | 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] | 1885 | gh->msg_type); |
Neels Hofmeyr | d0ba6d6 | 2016-06-03 00:44:23 +0200 | [diff] [blame] | 1886 | if (mmctx) |
| 1887 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
| 1888 | else |
| 1889 | rc = -EINVAL; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1890 | break; |
| 1891 | } |
| 1892 | |
| 1893 | return rc; |
Neels Hofmeyr | 4805d8f | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 1894 | |
| 1895 | null_mmctx: |
| 1896 | LOGP(DMM, LOGL_ERROR, |
| 1897 | "Received GSM 04.08 message type 0x%02x," |
| 1898 | " but no MM context available\n", |
| 1899 | gh->msg_type); |
| 1900 | return -EINVAL; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1901 | } |
| 1902 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1903 | static void mmctx_timer_cb(void *_mm) |
| 1904 | { |
| 1905 | struct sgsn_mm_ctx *mm = _mm; |
Jacob Erlbeck | 4d12767 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1906 | struct gsm_auth_tuple *at; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1907 | |
| 1908 | mm->num_T_exp++; |
| 1909 | |
| 1910 | switch (mm->T) { |
| 1911 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 1912 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1913 | LOGMMCTXP(LOGL_NOTICE, mm, "T3350 expired >= 5 times\n"); |
Jacob Erlbeck | 2533588 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1914 | mm_ctx_cleanup_free(mm, "T3350"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1915 | /* FIXME: should we return some error? */ |
| 1916 | break; |
| 1917 | } |
| 1918 | /* re-transmit the respective msg and re-start timer */ |
| 1919 | switch (mm->t3350_mode) { |
| 1920 | case GMM_T3350_MODE_ATT: |
| 1921 | gsm48_tx_gmm_att_ack(mm); |
| 1922 | break; |
| 1923 | case GMM_T3350_MODE_RAU: |
| 1924 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 1925 | break; |
| 1926 | case GMM_T3350_MODE_PTMSI_REALL: |
| 1927 | /* FIXME */ |
| 1928 | break; |
Jacob Erlbeck | 4f9b64a | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1929 | case GMM_T3350_MODE_NONE: |
| 1930 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 1931 | "T3350 mode wasn't set, ignoring timeout\n"); |
| 1932 | break; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1933 | } |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1934 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3350, 0); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1935 | break; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1936 | case 3360: /* waiting for AUTH AND CIPH RESP */ |
| 1937 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1938 | LOGMMCTXP(LOGL_NOTICE, mm, "T3360 expired >= 5 times\n"); |
Jacob Erlbeck | 2533588 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1939 | mm_ctx_cleanup_free(mm, "T3360"); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1940 | break; |
| 1941 | } |
Jacob Erlbeck | 4d12767 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1942 | /* Re-transmit the respective msg and re-start timer */ |
| 1943 | if (mm->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 1944 | LOGMMCTXP(LOGL_ERROR, mm, |
| 1945 | "timeout: invalid auth triplet reference\n"); |
| 1946 | mm_ctx_cleanup_free(mm, "T3360"); |
| 1947 | break; |
| 1948 | } |
| 1949 | at = &mm->auth_triplet; |
| 1950 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 1951 | 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] | 1952 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3360, 0); |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1953 | break; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1954 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 1955 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1956 | LOGMMCTXP(LOGL_NOTICE, mm, "T3370 expired >= 5 times\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1957 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Jacob Erlbeck | 2533588 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1958 | mm_ctx_cleanup_free(mm, "GPRS ATTACH REJECT (T3370)"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1959 | break; |
| 1960 | } |
| 1961 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 1962 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1963 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3370, 0); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1964 | break; |
| 1965 | default: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1966 | LOGMMCTXP(LOGL_ERROR, mm, "timer expired in unknown mode %u\n", |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1967 | mm->T); |
| 1968 | } |
| 1969 | } |
| 1970 | |
| 1971 | /* GPRS SESSION MANAGEMENT */ |
| 1972 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1973 | static void pdpctx_timer_cb(void *_mm); |
| 1974 | |
| 1975 | static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, |
| 1976 | unsigned int seconds) |
| 1977 | { |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1978 | if (osmo_timer_pending(&pdp->timer)) |
Pravin Kumarvel | b9d251d | 2016-11-17 12:19:01 +0530 | [diff] [blame] | 1979 | LOGPDPCTXP(LOGL_ERROR, pdp, "Starting PDP timer %u while old " |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1980 | "timer %u pending\n", T, pdp->T); |
| 1981 | pdp->T = T; |
| 1982 | pdp->num_T_exp = 0; |
| 1983 | |
| 1984 | /* FIXME: we should do this only once ? */ |
| 1985 | pdp->timer.data = pdp; |
| 1986 | pdp->timer.cb = &pdpctx_timer_cb; |
| 1987 | |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1988 | osmo_timer_schedule(&pdp->timer, seconds, 0); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1989 | } |
| 1990 | |
Pravin Kumarvel | 7b74246 | 2016-11-17 12:20:01 +0530 | [diff] [blame] | 1991 | static void pdpctx_timer_stop(struct sgsn_pdp_ctx *pdp, unsigned int T) |
| 1992 | { |
| 1993 | if (pdp->T != T) |
| 1994 | LOGPDPCTXP(LOGL_ERROR, pdp, "Stopping PDP timer %u but " |
| 1995 | "%u is running\n", T, pdp->T); |
| 1996 | osmo_timer_del(&pdp->timer); |
| 1997 | } |
| 1998 | |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1999 | #if 0 |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2000 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 2001 | { |
| 2002 | uint8_t v[6]; |
| 2003 | |
| 2004 | v[0] = PDP_TYPE_ORG_IETF; |
| 2005 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 2006 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 2007 | |
| 2008 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 2009 | } |
| 2010 | |
| 2011 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 2012 | { |
| 2013 | uint8_t v[2]; |
| 2014 | |
| 2015 | v[0] = PDP_TYPE_ORG_ETSI; |
| 2016 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 2017 | |
| 2018 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 2019 | } |
Holger Hans Peter Freyther | b32f34a | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 2020 | #endif |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2021 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2022 | /* Section 9.5.2: Activate PDP Context Accept */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2023 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2024 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2025 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP ACC"); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2026 | struct gsm48_hdr *gh; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2027 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2028 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2029 | LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2030 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_ACCEPT]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2031 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2032 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2033 | |
| 2034 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2035 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2036 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2037 | |
| 2038 | /* Negotiated LLC SAPI */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2039 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2040 | |
Harald Welte | 540dcbc | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 2041 | /* FIXME: copy QoS parameters from original request */ |
| 2042 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 2043 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2044 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2045 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2046 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2047 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2048 | /* PDP address */ |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2049 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 2050 | * the IE is identical with the 04.08 PDP Address IE */ |
| 2051 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2052 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 2053 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2054 | pdp->lib->eua.v[0] |= 0xf0; |
| 2055 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2056 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
Holger Hans Peter Freyther | 1b51fc2 | 2014-04-04 11:55:21 +0200 | [diff] [blame] | 2057 | if (pdp->lib->pco_req.l) |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2058 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | f2d6658 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 2059 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2060 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2061 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2062 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2063 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm, true); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2064 | } |
| 2065 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2066 | /* Section 9.5.3: Activate PDP Context reject */ |
| 2067 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 2068 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 2069 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2070 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP REJ"); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2071 | struct gsm48_hdr *gh; |
| 2072 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 2073 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2074 | LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2075 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REJECT]); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2076 | |
| 2077 | mmctx2msgid(msg, mm); |
| 2078 | |
| 2079 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2080 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2081 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 2082 | |
| 2083 | msgb_v_put(msg, cause); |
| 2084 | if (pco_len && pco_v) |
| 2085 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 2086 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2087 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2088 | } |
| 2089 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2090 | /* Section 9.5.8: Deactivate PDP Context Request */ |
| 2091 | static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 2092 | uint8_t sm_cause) |
| 2093 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2094 | 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] | 2095 | struct gsm48_hdr *gh; |
| 2096 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 2097 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2098 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2099 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_REQUEST]); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2100 | |
| 2101 | mmctx2msgid(msg, mm); |
| 2102 | |
| 2103 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2104 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2105 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; |
| 2106 | |
| 2107 | msgb_v_put(msg, sm_cause); |
| 2108 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2109 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2110 | } |
| 2111 | int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause) |
| 2112 | { |
Harald Welte | 9b57a3d | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 2113 | pdpctx_timer_start(pdp, 3395, sgsn->cfg.timers.T3395); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2114 | |
| 2115 | return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause); |
| 2116 | } |
| 2117 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2118 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2119 | 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] | 2120 | { |
Holger Hans Peter Freyther | dd5012a | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2121 | 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] | 2122 | struct gsm48_hdr *gh; |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2123 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2124 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2125 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2126 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_ACCEPT]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2127 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2128 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2129 | |
| 2130 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2131 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2132 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 2133 | |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2134 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2135 | } |
| 2136 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 2137 | { |
| 2138 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2139 | } |
| 2140 | |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2141 | static int activate_ggsn(struct sgsn_mm_ctx *mmctx, |
| 2142 | struct sgsn_ggsn_ctx *ggsn, const uint8_t transaction_id, |
| 2143 | 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] | 2144 | struct tlv_parsed *tp, int destroy_ggsn) |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2145 | { |
| 2146 | struct sgsn_pdp_ctx *pdp; |
| 2147 | |
Holger Hans Peter Freyther | 4b4f7b7 | 2015-05-29 15:11:55 +0200 | [diff] [blame] | 2148 | LOGMMCTXP(LOGL_DEBUG, mmctx, "Using GGSN %u\n", ggsn->id); |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2149 | ggsn->gsn = sgsn->gsn; |
| 2150 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, req_nsapi, tp); |
| 2151 | if (!pdp) |
| 2152 | return -1; |
| 2153 | |
| 2154 | /* Store SAPI and Transaction Identifier */ |
| 2155 | pdp->sapi = req_llc_sapi; |
| 2156 | pdp->ti = transaction_id; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2157 | pdp->destroy_ggsn = destroy_ggsn; |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2158 | |
| 2159 | return 0; |
| 2160 | } |
| 2161 | |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2162 | static void ggsn_lookup_cb(void *arg, int status, int timeouts, struct hostent *hostent) |
| 2163 | { |
| 2164 | struct sgsn_ggsn_ctx *ggsn; |
| 2165 | struct sgsn_ggsn_lookup *lookup = arg; |
| 2166 | struct in_addr *addr = NULL; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2167 | |
| 2168 | /* The context is gone while we made a request */ |
| 2169 | if (!lookup->mmctx) { |
| 2170 | talloc_free(lookup); |
| 2171 | return; |
| 2172 | } |
| 2173 | |
| 2174 | if (status != ARES_SUCCESS) { |
| 2175 | struct sgsn_mm_ctx *mmctx = lookup->mmctx; |
| 2176 | |
| 2177 | LOGMMCTXP(LOGL_ERROR, mmctx, "DNS query failed.\n"); |
| 2178 | |
| 2179 | /* Need to try with three digits now */ |
| 2180 | if (lookup->state == SGSN_GGSN_2DIGIT) { |
| 2181 | char *hostname; |
| 2182 | int rc; |
| 2183 | |
| 2184 | lookup->state = SGSN_GGSN_3DIGIT; |
| 2185 | hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, |
| 2186 | lookup->apn_str, 1); |
| 2187 | LOGMMCTXP(LOGL_DEBUG, mmctx, |
| 2188 | "Going to query %s\n", hostname); |
| 2189 | rc = sgsn_ares_query(sgsn, hostname, |
| 2190 | ggsn_lookup_cb, lookup); |
| 2191 | if (rc != 0) { |
Harald Welte | 0b8dbb7 | 2015-08-16 17:16:28 +0200 | [diff] [blame] | 2192 | LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't start GGSN\n"); |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2193 | goto reject_due_failure; |
| 2194 | } |
| 2195 | return; |
| 2196 | } |
| 2197 | |
| 2198 | LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't resolve GGSN\n"); |
| 2199 | goto reject_due_failure; |
| 2200 | } |
| 2201 | |
| 2202 | if (hostent->h_length != sizeof(struct in_addr)) { |
| 2203 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, |
Harald Welte | 369fb07 | 2015-08-16 17:16:57 +0200 | [diff] [blame] | 2204 | "Wrong addr size(%zu)\n", sizeof(struct in_addr)); |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2205 | goto reject_due_failure; |
| 2206 | } |
| 2207 | |
Holger Hans Peter Freyther | b985234 | 2015-06-02 09:38:41 +0200 | [diff] [blame] | 2208 | /* Get the first addr from the list */ |
| 2209 | addr = (struct in_addr *) hostent->h_addr_list[0]; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2210 | if (!addr) { |
| 2211 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "No host address.\n"); |
| 2212 | goto reject_due_failure; |
| 2213 | } |
| 2214 | |
| 2215 | ggsn = sgsn_ggsn_ctx_alloc(UINT32_MAX); |
| 2216 | if (!ggsn) { |
| 2217 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "Failed to create ggsn.\n"); |
| 2218 | goto reject_due_failure; |
| 2219 | } |
| 2220 | ggsn->remote_addr = *addr; |
| 2221 | LOGMMCTXP(LOGL_NOTICE, lookup->mmctx, |
| 2222 | "Selected %s as GGSN.\n", inet_ntoa(*addr)); |
| 2223 | |
| 2224 | /* forget about the ggsn look-up */ |
| 2225 | lookup->mmctx->ggsn_lookup = NULL; |
| 2226 | |
| 2227 | activate_ggsn(lookup->mmctx, ggsn, lookup->ti, lookup->nsapi, |
| 2228 | lookup->sapi, &lookup->tp, 1); |
| 2229 | |
| 2230 | /* Now free it */ |
| 2231 | talloc_free(lookup); |
| 2232 | return; |
| 2233 | |
| 2234 | reject_due_failure: |
| 2235 | gsm48_tx_gsm_act_pdp_rej(lookup->mmctx, lookup->ti, |
| 2236 | GMM_CAUSE_NET_FAIL, 0, NULL); |
| 2237 | lookup->mmctx->ggsn_lookup = NULL; |
| 2238 | talloc_free(lookup); |
| 2239 | } |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2240 | |
| 2241 | 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] | 2242 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2243 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2244 | 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] | 2245 | uint8_t req_qos_len, req_pdpa_len; |
| 2246 | uint8_t *req_qos, *req_pdpa; |
| 2247 | struct tlv_parsed tp; |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2248 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 2249 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2250 | struct sgsn_pdp_ctx *pdp; |
Jacob Erlbeck | 3400f11 | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 2251 | enum gsm48_gsm_cause gsm_cause; |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2252 | char apn_str[GSM_APN_LENGTH] = { 0, }; |
| 2253 | char *hostname; |
| 2254 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2255 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2256 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2257 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2258 | |
Harald Welte | b7b0fd7 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 2259 | /* FIXME: length checks! */ |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 2260 | req_qos_len = act_req->data[0]; |
| 2261 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 2262 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 2263 | 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] | 2264 | |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 2265 | switch (req_pdpa[0] & 0xf) { |
| 2266 | case 0x0: |
| 2267 | DEBUGPC(DMM, "ETSI "); |
| 2268 | break; |
| 2269 | case 0x1: |
| 2270 | DEBUGPC(DMM, "IETF "); |
| 2271 | break; |
| 2272 | case 0xf: |
| 2273 | DEBUGPC(DMM, "Empty "); |
| 2274 | break; |
| 2275 | } |
| 2276 | |
| 2277 | switch (req_pdpa[1]) { |
| 2278 | case 0x21: |
| 2279 | DEBUGPC(DMM, "IPv4 "); |
| 2280 | if (req_pdpa_len >= 6) { |
| 2281 | struct in_addr ia; |
| 2282 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 2283 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 2284 | } |
| 2285 | break; |
| 2286 | case 0x57: |
| 2287 | DEBUGPC(DMM, "IPv6 "); |
| 2288 | if (req_pdpa_len >= 18) { |
| 2289 | /* FIXME: print IPv6 address */ |
| 2290 | } |
| 2291 | break; |
| 2292 | default: |
| 2293 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 2294 | break; |
| 2295 | } |
| 2296 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2297 | LOGPC(DMM, LOGL_INFO, "\n"); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2298 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2299 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 2300 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 2301 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 2302 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2303 | GSM_CAUSE_INV_MAND_INFO, |
| 2304 | 0, NULL); |
| 2305 | } |
| 2306 | |
Holger Hans Peter Freyther | 3f7d46e | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2307 | /* Optional: Access Point Name, Protocol Config Options */ |
| 2308 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 2309 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 2310 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 2311 | else |
| 2312 | memset(&tp, 0, sizeof(tp)); |
| 2313 | |
| 2314 | |
| 2315 | /* put the non-TLV elements in the TLV parser structure to |
| 2316 | * pass them on to the SGSN / GTP code */ |
| 2317 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 2318 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 2319 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 2320 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 2321 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2322 | /* Check if NSAPI is already in use */ |
Harald Welte | 5fbac98 | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 2323 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 2324 | if (pdp) { |
| 2325 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 2326 | if (pdp->sapi == act_req->req_llc_sapi && |
| 2327 | pdp->ti == transaction_id) { |
| 2328 | /* This apparently is a re-transmission of a PDP CTX |
| 2329 | * ACT REQ (our ACT ACK must have got dropped) */ |
| 2330 | return gsm48_tx_gsm_act_pdp_acc(pdp); |
| 2331 | } |
| 2332 | |
| 2333 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2334 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2335 | GSM_CAUSE_NSAPI_IN_USE, |
| 2336 | 0, NULL); |
| 2337 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2338 | |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2339 | if (mmctx->ggsn_lookup) { |
| 2340 | if (mmctx->ggsn_lookup->sapi == act_req->req_llc_sapi && |
| 2341 | mmctx->ggsn_lookup->ti == transaction_id) { |
| 2342 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 2343 | "Re-transmission while doing look-up. Ignoring.\n"); |
| 2344 | return 0; |
| 2345 | } |
| 2346 | } |
| 2347 | |
Harald Welte | a456a23 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 2348 | /* Only increment counter for a real activation, after we checked |
| 2349 | * for re-transmissions */ |
| 2350 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 2351 | |
Jacob Erlbeck | 3400f11 | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 2352 | /* Determine GGSN based on APN and subscription options */ |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2353 | ggsn = sgsn_mm_ctx_find_ggsn_ctx(mmctx, &tp, &gsm_cause, apn_str); |
| 2354 | if (ggsn) |
| 2355 | return activate_ggsn(mmctx, ggsn, transaction_id, |
| 2356 | act_req->req_nsapi, act_req->req_llc_sapi, |
| 2357 | &tp, 0); |
| 2358 | |
| 2359 | if (strlen(apn_str) == 0) |
| 2360 | goto no_context; |
| 2361 | if (!sgsn->cfg.dynamic_lookup) |
| 2362 | goto no_context; |
| 2363 | |
| 2364 | /* schedule a dynamic look-up */ |
| 2365 | mmctx->ggsn_lookup = talloc_zero(tall_bsc_ctx, struct sgsn_ggsn_lookup); |
| 2366 | if (!mmctx->ggsn_lookup) |
| 2367 | goto no_context; |
| 2368 | |
| 2369 | mmctx->ggsn_lookup->state = SGSN_GGSN_2DIGIT; |
| 2370 | mmctx->ggsn_lookup->mmctx = mmctx; |
| 2371 | strcpy(mmctx->ggsn_lookup->apn_str, apn_str); |
| 2372 | |
| 2373 | mmctx->ggsn_lookup->orig_msg = msg; |
| 2374 | mmctx->ggsn_lookup->tp = tp; |
| 2375 | |
| 2376 | mmctx->ggsn_lookup->ti = transaction_id; |
| 2377 | mmctx->ggsn_lookup->nsapi = act_req->req_nsapi; |
| 2378 | mmctx->ggsn_lookup->sapi = act_req->req_llc_sapi; |
| 2379 | |
| 2380 | hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, |
| 2381 | mmctx->ggsn_lookup->apn_str, 0); |
| 2382 | |
| 2383 | LOGMMCTXP(LOGL_DEBUG, mmctx, "Going to query %s\n", hostname); |
| 2384 | rc = sgsn_ares_query(sgsn, hostname, |
| 2385 | ggsn_lookup_cb, mmctx->ggsn_lookup); |
| 2386 | if (rc != 0) { |
| 2387 | LOGMMCTXP(LOGL_ERROR, mmctx, "Failed to start ares query.\n"); |
| 2388 | goto no_context; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2389 | } |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 2390 | |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2391 | return 0; |
| 2392 | |
| 2393 | no_context: |
Harald Welte | 0b8dbb7 | 2015-08-16 17:16:28 +0200 | [diff] [blame] | 2394 | LOGMMCTXP(LOGL_ERROR, mmctx, "No GGSN context found!\n"); |
Holger Hans Peter Freyther | 2b1d49a | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2395 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2396 | gsm_cause, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2397 | } |
| 2398 | |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2399 | /* Section 9.5.1: Activate PDP Context Request */ |
| 2400 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 2401 | struct msgb *_msg) |
| 2402 | { |
| 2403 | struct msgb *msg; |
| 2404 | int rc; |
| 2405 | |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2406 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REQUEST]); |
| 2407 | |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2408 | /* |
| 2409 | * This is painful. We might not have a static GGSN |
| 2410 | * configuration and then would need to copy the msg |
| 2411 | * and re-do most of this routine (or call it again |
| 2412 | * and make sure it only goes through the dynamic |
| 2413 | * resolving. The question is what to optimize for |
| 2414 | * and the dynamic resolution will be the right thing |
| 2415 | * in the long run. |
| 2416 | */ |
| 2417 | msg = gprs_msgb_copy(_msg, __func__); |
| 2418 | if (!msg) { |
| 2419 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(_msg); |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2420 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Holger Hans Peter Freyther | 2c456b4 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2421 | |
| 2422 | LOGMMCTXP(LOGL_ERROR, mmctx, "-> ACTIVATE PDP CONTEXT REQ failed copy.\n"); |
| 2423 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 2424 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2425 | GSM_CAUSE_NET_FAIL, |
| 2426 | 0, NULL); |
| 2427 | } |
| 2428 | |
| 2429 | rc = do_act_pdp_req(mmctx, _msg); |
| 2430 | msgb_free(msg); |
| 2431 | return rc; |
| 2432 | } |
| 2433 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2434 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2435 | 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] | 2436 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2437 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2438 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2439 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2440 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2441 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 2442 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2443 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_REQUEST]); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2444 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2445 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 2446 | if (!pdp) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2447 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for " |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2448 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 2449 | mm->imsi, transaction_id); |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2450 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2451 | } |
| 2452 | |
| 2453 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2454 | } |
| 2455 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2456 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
| 2457 | static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) |
| 2458 | { |
| 2459 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | f1c283c | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2460 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2461 | struct sgsn_pdp_ctx *pdp; |
| 2462 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2463 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 32fdba0 | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2464 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_ACCEPT]); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2465 | |
| 2466 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 2467 | if (!pdp) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2468 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for " |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2469 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 2470 | mm->imsi, transaction_id); |
| 2471 | return 0; |
| 2472 | } |
Pravin Kumarvel | 7b74246 | 2016-11-17 12:20:01 +0530 | [diff] [blame] | 2473 | /* stop timer 3395 */ |
| 2474 | pdpctx_timer_stop(pdp, 3395); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2475 | return sgsn_delete_pdp_ctx(pdp); |
| 2476 | } |
| 2477 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2478 | 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] | 2479 | { |
| 2480 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 2481 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2482 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n", |
Jacob Erlbeck | 9346dad | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 2483 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2484 | |
| 2485 | return 0; |
| 2486 | } |
| 2487 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2488 | static void pdpctx_timer_cb(void *_pdp) |
| 2489 | { |
| 2490 | struct sgsn_pdp_ctx *pdp = _pdp; |
| 2491 | |
| 2492 | pdp->num_T_exp++; |
| 2493 | |
| 2494 | switch (pdp->T) { |
| 2495 | case 3395: /* waiting for PDP CTX DEACT ACK */ |
| 2496 | if (pdp->num_T_exp >= 4) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2497 | LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired >= 5 times\n"); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2498 | pdp->state = PDP_STATE_INACTIVE; |
| 2499 | sgsn_delete_pdp_ctx(pdp); |
| 2500 | break; |
| 2501 | } |
Alexander Couzens | 88790b2 | 2016-07-19 15:14:03 +0200 | [diff] [blame] | 2502 | gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2503 | break; |
| 2504 | default: |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2505 | LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n", |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2506 | pdp->T); |
| 2507 | } |
| 2508 | } |
| 2509 | |
| 2510 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2511 | /* GPRS Session Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2512 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 2513 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2514 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2515 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2516 | int rc; |
| 2517 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2518 | /* MMCTX can be NULL when called */ |
| 2519 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2520 | if (!mmctx) { |
| 2521 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2522 | /* 6.1.3.6 */ |
| 2523 | if (gh->msg_type == GSM48_MT_GSM_STATUS) |
| 2524 | return 0; |
| 2525 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2526 | return gsm0408_gprs_force_reattach_oldmsg(msg, llme); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2527 | } |
| 2528 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2529 | switch (gh->msg_type) { |
| 2530 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2531 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2532 | break; |
| 2533 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2534 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2535 | break; |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2536 | case GSM48_MT_GSM_DEACT_PDP_ACK: |
| 2537 | rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); |
| 2538 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2539 | case GSM48_MT_GSM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2540 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2541 | break; |
| 2542 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 2543 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 2544 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
Harald Welte | 20cbe91 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2545 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x: %s\n", |
| 2546 | gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 2547 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2548 | break; |
| 2549 | default: |
Harald Welte | 20cbe91 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2550 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x: %s\n", |
| 2551 | gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 2552 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2553 | break; |
| 2554 | |
| 2555 | } |
| 2556 | |
| 2557 | return rc; |
| 2558 | } |
| 2559 | |
Max | 6d99958 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2560 | int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg, |
| 2561 | struct gprs_llc_llme *llme) |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2562 | { |
Jacob Erlbeck | 6e15b73 | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2563 | int rc; |
Alexander Couzens | 9625a61 | 2016-08-30 18:50:58 +0200 | [diff] [blame] | 2564 | if (llme) |
| 2565 | gprs_llgmm_reset_oldmsg(msg, GPRS_SAPI_GMM, llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2566 | |
Jacob Erlbeck | 6e15b73 | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2567 | rc = gsm48_tx_gmm_detach_req_oldmsg( |
| 2568 | msg, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2569 | |
Jacob Erlbeck | 6e15b73 | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2570 | return rc; |
| 2571 | } |
| 2572 | |
| 2573 | int gsm0408_gprs_force_reattach(struct sgsn_mm_ctx *mmctx) |
| 2574 | { |
| 2575 | int rc; |
Harald Welte | 1548700 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2576 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) |
| 2577 | gprs_llgmm_reset(mmctx->gb.llme); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2578 | |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2579 | rc = gsm48_tx_gmm_detach_req( |
| 2580 | mmctx, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2581 | |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2582 | mm_ctx_cleanup_free(mmctx, "forced reattach"); |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2583 | |
Jacob Erlbeck | 0a6a02e | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2584 | return rc; |
Jacob Erlbeck | ccaa22a | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2585 | } |
| 2586 | |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 2587 | /* Main entry point for incoming 04.08 GPRS messages from Iu */ |
| 2588 | int gsm0408_gprs_rcvmsg_iu(struct msgb *msg, struct gprs_ra_id *ra_id, |
| 2589 | uint16_t *sai) |
| 2590 | { |
| 2591 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 2592 | uint8_t pdisc = gsm48_hdr_pdisc(gh); |
| 2593 | struct sgsn_mm_ctx *mmctx; |
| 2594 | int rc = -EINVAL; |
| 2595 | |
| 2596 | mmctx = sgsn_mm_ctx_by_ue_ctx(msg->dst); |
| 2597 | if (mmctx) { |
| 2598 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 2599 | if (ra_id) |
| 2600 | memcpy(&mmctx->ra, ra_id, sizeof(mmctx->ra)); |
| 2601 | } |
| 2602 | |
| 2603 | /* MMCTX can be NULL */ |
| 2604 | |
| 2605 | switch (pdisc) { |
| 2606 | case GSM48_PDISC_MM_GPRS: |
| 2607 | rc = gsm0408_rcv_gmm(mmctx, msg, NULL, false); |
| 2608 | #warning "set drop_cipherable arg for gsm0408_rcv_gmm() from IuPS?" |
| 2609 | break; |
| 2610 | case GSM48_PDISC_SM_GPRS: |
| 2611 | rc = gsm0408_rcv_gsm(mmctx, msg, NULL); |
| 2612 | break; |
| 2613 | default: |
| 2614 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 2615 | "Unknown GSM 04.08 discriminator 0x%02x: %s\n", |
| 2616 | pdisc, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
| 2617 | /* FIXME: return status message */ |
| 2618 | break; |
| 2619 | } |
| 2620 | |
| 2621 | /* MMCTX can be invalid */ |
| 2622 | |
| 2623 | return rc; |
| 2624 | } |
| 2625 | |
Harald Welte | beaf11d | 2015-12-25 19:14:57 +0100 | [diff] [blame] | 2626 | /* Main entry point for incoming 04.08 GPRS messages from Gb */ |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2627 | int gsm0408_gprs_rcvmsg_gb(struct msgb *msg, struct gprs_llc_llme *llme, |
| 2628 | bool drop_cipherable) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2629 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2630 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | f94dfd5 | 2016-03-14 16:13:24 +0100 | [diff] [blame] | 2631 | uint8_t pdisc = gsm48_hdr_pdisc(gh); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2632 | struct sgsn_mm_ctx *mmctx; |
| 2633 | struct gprs_ra_id ra_id; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2634 | int rc = -EINVAL; |
| 2635 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2636 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 2637 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2638 | if (mmctx) { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2639 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2640 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 2641 | mmctx->gb.llme = llme; |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2642 | } |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2643 | |
| 2644 | /* MMCTX can be NULL */ |
| 2645 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2646 | switch (pdisc) { |
| 2647 | case GSM48_PDISC_MM_GPRS: |
Max | 4bc2821 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2648 | rc = gsm0408_rcv_gmm(mmctx, msg, llme, drop_cipherable); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2649 | break; |
| 2650 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2651 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2652 | break; |
| 2653 | default: |
Harald Welte | bdeaf5f | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 2654 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 2655 | "Unknown GSM 04.08 discriminator 0x%02x: %s\n", |
Harald Welte | 20cbe91 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2656 | pdisc, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2657 | /* FIXME: return status message */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2658 | break; |
| 2659 | } |
| 2660 | |
Jacob Erlbeck | 12396bd | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 2661 | /* MMCTX can be invalid */ |
| 2662 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2663 | return rc; |
| 2664 | } |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 2665 | |
| 2666 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 2667 | { |
| 2668 | struct sgsn_mm_ctx *mmctx; |
| 2669 | |
| 2670 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 2671 | if (!mmctx) { |
| 2672 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 2673 | "TLLI=%08x\n", tlli); |
| 2674 | return -EINVAL; |
| 2675 | } |
| 2676 | |
Jacob Erlbeck | 764b8d5 | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 2677 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 2678 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2679 | LOGMMCTXP(LOGL_NOTICE, mmctx, "SUSPEND request while state " |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 2680 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 2681 | return -EINVAL; |
| 2682 | } |
| 2683 | |
| 2684 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
| 2685 | mmctx->mm_state = GMM_REGISTERED_SUSPENDED; |
| 2686 | return 0; |
| 2687 | } |
| 2688 | |
| 2689 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 2690 | uint8_t suspend_ref) |
| 2691 | { |
| 2692 | struct sgsn_mm_ctx *mmctx; |
| 2693 | |
| 2694 | /* FIXME: make use of suspend reference? */ |
| 2695 | |
| 2696 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 2697 | if (!mmctx) { |
| 2698 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 2699 | "TLLI=%08x\n", tlli); |
| 2700 | return -EINVAL; |
| 2701 | } |
| 2702 | |
Jacob Erlbeck | 764b8d5 | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 2703 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 2704 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2705 | LOGMMCTXP(LOGL_NOTICE, mmctx, "RESUME request while state " |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 2706 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 2707 | /* FIXME: should we not simply ignore it? */ |
| 2708 | return -EINVAL; |
| 2709 | } |
| 2710 | |
| 2711 | /* Transition from SUSPENDED to NORMAL */ |
| 2712 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
| 2713 | return 0; |
| 2714 | } |
Daniel Willmann | 943f973 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 2715 | |
| 2716 | #ifdef BUILD_IU |
| 2717 | int iu_rab_act_ps(uint8_t rab_id, struct sgsn_pdp_ctx *pdp, bool use_x213_nsap) |
| 2718 | { |
| 2719 | struct msgb *msg; |
| 2720 | struct sgsn_mm_ctx *mm = pdp->mm; |
| 2721 | struct ue_conn_ctx *uectx; |
| 2722 | uint32_t ggsn_ip; |
| 2723 | |
| 2724 | uectx = mm->iu.ue_ctx; |
| 2725 | |
| 2726 | /* Get the IP address for ggsn user plane */ |
| 2727 | memcpy(&ggsn_ip, pdp->lib->gsnru.v, pdp->lib->gsnru.l); |
| 2728 | ggsn_ip = htonl(ggsn_ip); |
| 2729 | |
| 2730 | LOGP(DRANAP, LOGL_DEBUG, "Assigning RAB: rab_id=%d, ggsn_ip=%x," |
| 2731 | " teid_gn=%x, use_x213_nsap=%d\n", |
| 2732 | rab_id, ggsn_ip, pdp->lib->teid_gn, use_x213_nsap); |
| 2733 | |
| 2734 | msg = ranap_new_msg_rab_assign_data(rab_id, ggsn_ip, |
| 2735 | pdp->lib->teid_gn, use_x213_nsap); |
| 2736 | msg->l2h = msg->data; |
| 2737 | return iu_rab_act(uectx, msg); |
| 2738 | } |
| 2739 | #endif |