Harald Welte | 9b455bf | 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 | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 4 | /* (C) 2009-2015 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Harald Welte | 9b455bf | 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 | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 9b455bf | 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 | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 9b455bf | 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 | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 27 | #include <stdint.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 28 | #include <errno.h> |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 29 | #include <stdbool.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 30 | #include <netinet/in.h> |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 32 | #include <netdb.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 33 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 34 | #include "bscconfig.h" |
| 35 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 36 | #include <osmocom/core/msgb.h> |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 37 | #include <osmocom/gsm/tlv.h> |
| 38 | #include <osmocom/gsm/gsm_utils.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 39 | #include <osmocom/core/signal.h> |
| 40 | #include <osmocom/core/talloc.h> |
| 41 | #include <osmocom/core/rate_ctr.h> |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 42 | #include <osmocom/core/utils.h> |
Daniel Willmann | 770f3e3 | 2016-05-21 00:31:12 +0200 | [diff] [blame] | 43 | #include <osmocom/crypt/auth.h> |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 44 | #include <osmocom/gsm/apn.h> |
Harald Welte | 53373bc | 2016-04-20 17:11:43 +0200 | [diff] [blame] | 45 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
Harald Welte | d605709 | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 46 | |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 47 | #include <osmocom/gprs/gprs_bssgp.h> |
| 48 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 49 | #ifdef BUILD_IU |
| 50 | #include <osmocom/ranap/ranap_ies_defs.h> |
Daniel Willmann | af24172 | 2016-05-21 00:35:41 +0200 | [diff] [blame] | 51 | #include <osmocom/ranap/ranap_msg_factory.h> |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 52 | #include <osmocom/ranap/iu_client.h> |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 53 | #endif |
| 54 | |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 55 | #include <osmocom/sgsn/debug.h> |
| 56 | #include <osmocom/sgsn/gprs_llc.h> |
| 57 | #include <osmocom/sgsn/gprs_sgsn.h> |
| 58 | #include <osmocom/sgsn/gprs_gmm.h> |
| 59 | #include <osmocom/sgsn/gprs_utils.h> |
| 60 | #include <osmocom/sgsn/gprs_subscriber.h> |
| 61 | #include <osmocom/sgsn/sgsn.h> |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 62 | #include <osmocom/sgsn/gprs_gmm_attach.h> |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 63 | #include <osmocom/sgsn/signal.h> |
| 64 | #include <osmocom/sgsn/gprs_sndcp.h> |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 65 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 66 | #include <pdp.h> |
| 67 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 68 | #define PTMSI_ALLOC |
| 69 | |
Pau Espin Pedrol | 20795e3 | 2019-05-28 21:25:06 +0200 | [diff] [blame] | 70 | /* 3GPP TS 04.08 sec 6.1.3.4.3(.a) "Abnormal cases" */ |
| 71 | #define T339X_MAX_RETRANS 4 |
| 72 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 73 | extern struct sgsn_instance *sgsn; |
Pau Espin Pedrol | b1d1c24 | 2018-10-30 17:27:59 +0100 | [diff] [blame] | 74 | extern void *tall_sgsn_ctx; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 75 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 76 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 77 | .def = { |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 78 | [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, |
Harald Welte | 588d44e | 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 | 4b6ac1e | 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 }, |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 84 | [GSM48_IE_GMM_AUTH_RES_EXT] = { TLV_TYPE_TLV, 0 }, |
| 85 | [GSM48_IE_GMM_AUTH_FAIL_PAR] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 86 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 87 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 88 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 89 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 90 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 91 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 92 | }, |
| 93 | }; |
| 94 | |
| 95 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 96 | .def = { |
| 97 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 98 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 99 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 100 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 101 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 102 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 103 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, |
| 104 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 105 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 106 | }, |
| 107 | }; |
| 108 | |
Alexander Couzens | 17a29ef | 2017-01-31 18:13:15 +0100 | [diff] [blame] | 109 | static const struct value_string gprs_pmm_state_names[] = { |
| 110 | { PMM_DETACHED, "PMM DETACH" }, |
| 111 | { PMM_CONNECTED, "PMM CONNECTED" }, |
| 112 | { PMM_IDLE, "PMM IDLE" }, |
| 113 | { MM_IDLE, "MM IDLE" }, |
| 114 | { MM_READY, "MM READY" }, |
| 115 | { MM_STANDBY, "MM STANDBY" }, |
Neels Hofmeyr | 5616cdd | 2017-03-01 15:01:28 +0100 | [diff] [blame] | 116 | { 0, NULL } |
Alexander Couzens | 17a29ef | 2017-01-31 18:13:15 +0100 | [diff] [blame] | 117 | }; |
| 118 | |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 119 | /* On RANAP, Returns pointer to he associated ranap_ue_conn_ctx in msg, filled |
| 120 | * in by osmo-iuh's iu_recv_cb(). |
| 121 | * On Gb, returns NULL */ |
| 122 | #define MSG_IU_UE_CTX(msg) ((struct ranap_ue_conn_ctx *)(msg)->dst) |
| 123 | #define MSG_IU_UE_CTX_SET(msg, val) (msg)->dst = (val) |
| 124 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 125 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx); |
| 126 | |
Daniel Willmann | 21b269f | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 127 | static void mmctx_change_gtpu_endpoints_to_sgsn(struct sgsn_mm_ctx *mm_ctx) |
| 128 | { |
| 129 | struct sgsn_pdp_ctx *pdp; |
| 130 | llist_for_each_entry(pdp, &mm_ctx->pdp_list, list) { |
Max | c005db7 | 2017-10-27 18:43:29 +0200 | [diff] [blame] | 131 | LOGMMCTXP(LOGL_INFO, mm_ctx, "Changing GTP-U endpoints %s -> %s\n", |
| 132 | sgsn_gtp_ntoa(&pdp->lib->gsnlu), inet_ntoa(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Daniel Willmann | 21b269f | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 133 | sgsn_pdp_upd_gtp_u(pdp, |
| 134 | &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 135 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
| 136 | } |
| 137 | } |
| 138 | |
Pau Espin Pedrol | 6e31125 | 2019-08-13 19:07:22 +0200 | [diff] [blame] | 139 | static void mmctx_set_pmm_state(struct sgsn_mm_ctx *ctx, enum gprs_pmm_state state) |
Daniel Willmann | c17cdb4 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 140 | { |
Pau Espin Pedrol | 2179dec | 2019-08-13 19:09:32 +0200 | [diff] [blame^] | 141 | OSMO_ASSERT(ctx->ran_type == MM_CTX_T_UTRAN_Iu); |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 142 | |
Daniel Willmann | c17cdb4 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 143 | if (ctx->pmm_state == state) |
| 144 | return; |
| 145 | |
Alexander Couzens | 17a29ef | 2017-01-31 18:13:15 +0100 | [diff] [blame] | 146 | LOGMMCTXP(LOGL_INFO, ctx, "Changing PMM state from %s to %s\n", |
| 147 | get_value_string(gprs_pmm_state_names, ctx->pmm_state), |
| 148 | get_value_string(gprs_pmm_state_names, state)); |
Daniel Willmann | c17cdb4 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 149 | |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 150 | switch (state) { |
| 151 | case PMM_IDLE: |
| 152 | /* TODO: start RA Upd timer */ |
| 153 | mmctx_change_gtpu_endpoints_to_sgsn(ctx); |
| 154 | break; |
| 155 | case PMM_CONNECTED: |
| 156 | break; |
| 157 | default: |
| 158 | break; |
Daniel Willmann | c17cdb4 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | ctx->pmm_state = state; |
| 162 | } |
| 163 | |
Pau Espin Pedrol | 6e31125 | 2019-08-13 19:07:22 +0200 | [diff] [blame] | 164 | static void mmctx_set_mm_state(struct sgsn_mm_ctx *ctx, enum gprs_pmm_state state) |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 165 | { |
Pau Espin Pedrol | 2179dec | 2019-08-13 19:09:32 +0200 | [diff] [blame^] | 166 | OSMO_ASSERT(ctx->ran_type == MM_CTX_T_GERAN_Gb); |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 167 | |
| 168 | if (ctx->pmm_state == state) |
| 169 | return; |
| 170 | |
Alexander Couzens | 17a29ef | 2017-01-31 18:13:15 +0100 | [diff] [blame] | 171 | LOGMMCTXP(LOGL_INFO, ctx, "Changing MM state from %s to %s\n", |
| 172 | get_value_string(gprs_pmm_state_names, ctx->pmm_state), |
| 173 | get_value_string(gprs_pmm_state_names, state)); |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 174 | |
| 175 | ctx->pmm_state = state; |
| 176 | } |
| 177 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 178 | #ifdef BUILD_IU |
| 179 | int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies); |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 180 | int sgsn_ranap_iu_event(struct ranap_ue_conn_ctx *ctx, enum ranap_iu_event_type type, void *data) |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 181 | { |
| 182 | struct sgsn_mm_ctx *mm; |
| 183 | int rc = -1; |
| 184 | |
| 185 | mm = sgsn_mm_ctx_by_ue_ctx(ctx); |
Neels Hofmeyr | d6649c3 | 2017-07-20 14:41:34 +0200 | [diff] [blame] | 186 | |
| 187 | #define REQUIRE_MM \ |
| 188 | if (!mm) { \ |
| 189 | LOGP(DRANAP, LOGL_NOTICE, "Cannot find mm ctx for IU event %d\n", type); \ |
| 190 | return rc; \ |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | switch (type) { |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 194 | case RANAP_IU_EVENT_RAB_ASSIGN: |
Neels Hofmeyr | d6649c3 | 2017-07-20 14:41:34 +0200 | [diff] [blame] | 195 | REQUIRE_MM |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 196 | rc = sgsn_ranap_rab_ass_resp(mm, (RANAP_RAB_SetupOrModifiedItemIEs_t *)data); |
| 197 | break; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 198 | case RANAP_IU_EVENT_IU_RELEASE: |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 199 | /* fall thru */ |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 200 | case RANAP_IU_EVENT_LINK_INVALIDATED: |
| 201 | /* Clean up ranap_ue_conn_ctx here */ |
Neels Hofmeyr | d6649c3 | 2017-07-20 14:41:34 +0200 | [diff] [blame] | 202 | if (mm) |
| 203 | LOGMMCTXP(LOGL_INFO, mm, "IU release for imsi %s\n", mm->imsi); |
| 204 | else |
| 205 | LOGMMCTXP(LOGL_INFO, mm, "IU release for UE conn 0x%x\n", |
| 206 | ctx->conn_id); |
| 207 | if (mm && mm->pmm_state == PMM_CONNECTED) |
Daniel Willmann | c17cdb4 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 208 | mmctx_set_pmm_state(mm, PMM_IDLE); |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 209 | rc = 0; |
| 210 | break; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 211 | case RANAP_IU_EVENT_SECURITY_MODE_COMPLETE: |
Neels Hofmeyr | d6649c3 | 2017-07-20 14:41:34 +0200 | [diff] [blame] | 212 | REQUIRE_MM |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 213 | /* Continue authentication here */ |
| 214 | mm->iu.ue_ctx->integrity_active = 1; |
Alexander Couzens | 932ccf8 | 2019-04-16 09:08:22 +0200 | [diff] [blame] | 215 | |
| 216 | /* FIXME: remove gmm_authorize */ |
| 217 | if (mm->pending_req != GSM48_MT_GMM_ATTACH_REQ) |
| 218 | gsm48_gmm_authorize(mm); |
| 219 | else |
| 220 | osmo_fsm_inst_dispatch(mm->gmm_att_req.fsm, E_IU_SECURITY_CMD_COMPLETE, NULL); |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 221 | break; |
| 222 | default: |
| 223 | LOGP(DRANAP, LOGL_NOTICE, "Unknown event received: %i\n", type); |
| 224 | rc = -1; |
| 225 | break; |
| 226 | } |
| 227 | return rc; |
| 228 | } |
| 229 | #endif |
| 230 | |
| 231 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 232 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 233 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 234 | static void mmctx_timer_cb(void *_mm); |
| 235 | |
| 236 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 237 | unsigned int seconds) |
| 238 | { |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 239 | if (osmo_timer_pending(&mm->timer)) |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 240 | LOGMMCTXP(LOGL_ERROR, mm, "Starting MM timer %u while old " |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 241 | "timer %u pending\n", T, mm->T); |
| 242 | mm->T = T; |
| 243 | mm->num_T_exp = 0; |
| 244 | |
| 245 | /* FIXME: we should do this only once ? */ |
Pablo Neira Ayuso | 5121576 | 2017-05-08 20:57:52 +0200 | [diff] [blame] | 246 | osmo_timer_setup(&mm->timer, mmctx_timer_cb, mm); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 247 | osmo_timer_schedule(&mm->timer, seconds, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 251 | { |
| 252 | if (mm->T != T) |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 253 | LOGMMCTXP(LOGL_ERROR, mm, "Stopping MM timer %u but " |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 254 | "%u is running\n", T, mm->T); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 255 | osmo_timer_del(&mm->timer); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 256 | } |
| 257 | |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 258 | time_t gprs_max_time_to_idle(void) |
| 259 | { |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 260 | return sgsn->cfg.timers.T3314 + (sgsn->cfg.timers.T3312 + 4 * 60); |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 261 | } |
| 262 | |
Neels Hofmeyr | 723f7c7 | 2016-08-11 19:12:54 +0200 | [diff] [blame] | 263 | /* Send a message through the underlying layer. |
| 264 | * For param encryptable, see 3GPP TS 24.008 § 4.7.1.2 and |
| 265 | * gsm48_hdr_gmm_cipherable(). Pass false for not cipherable messages. */ |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 266 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 267 | struct sgsn_mm_ctx *mm, bool encryptable) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 268 | { |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 269 | if (mm) { |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 270 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 271 | #ifdef BUILD_IU |
| 272 | if (mm->ran_type == MM_CTX_T_UTRAN_Iu) |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 273 | return ranap_iu_tx(msg, GPRS_SAPI_GMM); |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 274 | #endif |
| 275 | } |
| 276 | |
| 277 | #ifdef BUILD_IU |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 278 | if (MSG_IU_UE_CTX(msg)) |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 279 | return ranap_iu_tx(msg, GPRS_SAPI_GMM); |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 280 | #endif |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 281 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 282 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 283 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm, encryptable); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 284 | } |
| 285 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 286 | /* copy identifiers from old message to new message, this |
| 287 | * is required so lower layers can route it correctly */ |
| 288 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 289 | { |
| 290 | msgb_tlli(msg) = msgb_tlli(old); |
| 291 | msgb_bvci(msg) = msgb_bvci(old); |
| 292 | msgb_nsei(msg) = msgb_nsei(old); |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 293 | MSG_IU_UE_CTX_SET(msg, MSG_IU_UE_CTX(old)); |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 294 | } |
| 295 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 296 | /* Store BVCI/NSEI in MM context */ |
| 297 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 298 | { |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 299 | mm->gb.bvci = msgb_bvci(msg); |
| 300 | mm->gb.nsei = msgb_nsei(msg); |
Daniel Willmann | d75864f | 2016-05-21 00:11:39 +0200 | [diff] [blame] | 301 | /* In case a Iu connection is reconnected we need to update the ue ctx */ |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 302 | mm->iu.ue_ctx = MSG_IU_UE_CTX(msg); |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 303 | if (mm->ran_type == MM_CTX_T_UTRAN_Iu |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 304 | && mm->iu.ue_ctx) { |
| 305 | #ifdef BUILD_IU |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 306 | mm->iu.ue_ctx->rab_assign_addr_enc = |
| 307 | sgsn->cfg.iu.rab_assign_addr_enc; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 308 | #endif |
| 309 | } |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | /* Store BVCI/NSEI in MM context */ |
| 313 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 314 | { |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 315 | msgb_tlli(msg) = mm->gb.tlli; |
| 316 | msgb_bvci(msg) = mm->gb.bvci; |
| 317 | msgb_nsei(msg) = mm->gb.nsei; |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 318 | MSG_IU_UE_CTX_SET(msg, mm->iu.ue_ctx); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 319 | } |
| 320 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 321 | static void mm_ctx_cleanup_free(struct sgsn_mm_ctx *ctx, const char *log_text) |
| 322 | { |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 323 | LOGMMCTXP(LOGL_INFO, ctx, "Cleaning MM context due to %s\n", log_text); |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 324 | |
| 325 | /* Mark MM state as deregistered */ |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 326 | ctx->gmm_state = GMM_DEREGISTERED; |
Pau Espin Pedrol | 2179dec | 2019-08-13 19:09:32 +0200 | [diff] [blame^] | 327 | |
| 328 | switch(ctx->ran_type) { |
| 329 | case MM_CTX_T_UTRAN_Iu: |
| 330 | mmctx_set_pmm_state(ctx, PMM_DETACHED); |
| 331 | break; |
| 332 | case MM_CTX_T_GERAN_Gb: |
| 333 | mmctx_set_mm_state(ctx, MM_IDLE); |
| 334 | break; |
| 335 | } |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 336 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 337 | sgsn_mm_ctx_cleanup_free(ctx); |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 338 | } |
| 339 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 340 | /* Chapter 9.4.18 */ |
| 341 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 342 | struct sgsn_mm_ctx *mmctx, int sm) |
| 343 | { |
| 344 | struct gsm48_hdr *gh; |
| 345 | |
| 346 | /* MMCTX might be NULL! */ |
| 347 | |
| 348 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 349 | get_value_string(gsm48_gmm_cause_names, cause)); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 350 | |
| 351 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 352 | if (sm) { |
| 353 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 354 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 355 | } else { |
| 356 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 357 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 358 | } |
| 359 | gh->data[0] = cause; |
| 360 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 361 | return gsm48_gmm_sendmsg(msg, 0, mmctx, true); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 362 | } |
Jacob Erlbeck | 7067142 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 363 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 364 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 365 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 366 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 GMM STATUS"); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 367 | |
| 368 | mmctx2msgid(msg, mmctx); |
| 369 | return _tx_status(msg, cause, mmctx, 0); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 370 | } |
Jacob Erlbeck | 7067142 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 371 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 372 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 373 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 374 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SM STATUS"); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 375 | |
| 376 | mmctx2msgid(msg, mmctx); |
| 377 | return _tx_status(msg, cause, mmctx, 1); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 378 | } |
| 379 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 380 | static int _tx_detach_req(struct msgb *msg, uint8_t detach_type, uint8_t cause, |
| 381 | struct sgsn_mm_ctx *mmctx) |
| 382 | { |
| 383 | struct gsm48_hdr *gh; |
| 384 | |
| 385 | /* MMCTX might be NULL! */ |
| 386 | |
| 387 | DEBUGP(DMM, "<- GPRS MM DETACH REQ (type: %s, cause: %s)\n", |
| 388 | get_value_string(gprs_det_t_mt_strs, detach_type), |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 389 | get_value_string(gsm48_gmm_cause_names, cause)); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 390 | |
| 391 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 392 | |
| 393 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 394 | gh->msg_type = GSM48_MT_GMM_DETACH_REQ; |
| 395 | gh->data[0] = detach_type & 0x07; |
| 396 | |
| 397 | msgb_tv_put(msg, GSM48_IE_GMM_CAUSE, cause); |
| 398 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 399 | return gsm48_gmm_sendmsg(msg, 0, mmctx, true); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | static int gsm48_tx_gmm_detach_req(struct sgsn_mm_ctx *mmctx, |
| 403 | uint8_t detach_type, uint8_t cause) |
| 404 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 405 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET REQ"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 406 | |
| 407 | mmctx2msgid(msg, mmctx); |
| 408 | return _tx_detach_req(msg, detach_type, cause, mmctx); |
| 409 | } |
| 410 | |
| 411 | static int gsm48_tx_gmm_detach_req_oldmsg(struct msgb *oldmsg, |
| 412 | uint8_t detach_type, uint8_t cause) |
| 413 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 414 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET OLD"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 415 | |
| 416 | gmm_copy_id(msg, oldmsg); |
| 417 | return _tx_detach_req(msg, detach_type, cause, NULL); |
| 418 | } |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 419 | |
Harald Welte | 86fda90 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 420 | static struct gsm48_qos default_qos = { |
| 421 | .delay_class = 4, /* best effort */ |
| 422 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 423 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 424 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 425 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 426 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 427 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 428 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 429 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 430 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 431 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 432 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 433 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 434 | .handling_prio = 3, |
| 435 | .xfer_delay = 0x10, /* 200ms */ |
| 436 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 437 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 438 | .sig_ind = 0, /* not optimised for signalling */ |
| 439 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 440 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 441 | }; |
| 442 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 443 | /* Chapter 9.4.2: Attach accept */ |
Alexander Couzens | d4788cd | 2018-05-02 22:32:19 +0200 | [diff] [blame] | 444 | int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 445 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 446 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT ACK"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 447 | struct gsm48_hdr *gh; |
| 448 | struct gsm48_attach_ack *aa; |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 449 | uint8_t *mid; |
| 450 | #if 0 |
| 451 | uint8_t *ptsig; |
| 452 | #endif |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 453 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 454 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 455 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_ACKED]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 456 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 457 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 458 | |
| 459 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 460 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 461 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 462 | |
| 463 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 464 | aa->force_stby = 0; /* not indicated */ |
| 465 | aa->att_result = 1; /* GPRS only */ |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 466 | aa->ra_upd_timer = gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3312); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 467 | aa->radio_prio = 4; /* lowest */ |
Max | 25c65c3 | 2018-01-08 14:43:53 +0100 | [diff] [blame] | 468 | gsm48_encode_ra(&aa->ra_id, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 469 | |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 470 | #if 0 |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 471 | /* Optional: P-TMSI signature */ |
| 472 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 473 | ptsig = msgb_put(msg, 3); |
| 474 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 475 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 476 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 477 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 478 | #endif |
Jacob Erlbeck | 8de9c48 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 479 | /* Optional: Negotiated Ready timer value |
| 480 | * (fixed 44s, default value, GSM 04.08, table 11.4a) to safely limit |
| 481 | * the inactivity time READY->STANDBY. |
| 482 | */ |
| 483 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 484 | gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 485 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 486 | #ifdef PTMSI_ALLOC |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 487 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 488 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 489 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 490 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 491 | #endif |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 492 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 493 | /* Optional: MS-identity (combined attach) */ |
| 494 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 495 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 496 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 500 | static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause, |
| 501 | const struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 502 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 503 | struct gsm48_hdr *gh; |
| 504 | |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 505 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS ATTACH REJECT: %s\n", |
| 506 | get_value_string(gsm48_gmm_cause_names, gmm_cause)); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 507 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REJECTED]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 508 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 509 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 510 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 511 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 512 | gh->data[0] = gmm_cause; |
| 513 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 514 | return gsm48_gmm_sendmsg(msg, 0, NULL, false); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 515 | } |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 516 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 517 | uint8_t gmm_cause) |
| 518 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 519 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT REJ OLD"); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 520 | gmm_copy_id(msg, old_msg); |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 521 | return _tx_gmm_att_rej(msg, gmm_cause, NULL); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 522 | } |
Alexander Couzens | d4788cd | 2018-05-02 22:32:19 +0200 | [diff] [blame] | 523 | int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 524 | uint8_t gmm_cause) |
| 525 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 526 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ATT REJ"); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 527 | mmctx2msgid(msg, mm); |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 528 | return _tx_gmm_att_rej(msg, gmm_cause, mm); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 529 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 530 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 531 | /* Chapter 9.4.6.2 Detach accept */ |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 532 | static int _tx_detach_ack(struct msgb *msg, uint8_t force_stby, |
| 533 | struct sgsn_mm_ctx *mm) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 534 | { |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 535 | struct gsm48_hdr *gh; |
| 536 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 537 | /* MMCTX might be NULL! */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 538 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 539 | DEBUGP(DMM, "<- GPRS MM DETACH ACC (force-standby: %d)\n", force_stby); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 540 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_ACKED]); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 541 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 542 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 543 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 544 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 545 | gh->data[0] = force_stby; |
| 546 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 547 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 548 | } |
| 549 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 550 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
| 551 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 552 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACK"); |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 553 | |
| 554 | mmctx2msgid(msg, mm); |
| 555 | return _tx_detach_ack(msg, force_stby, mm); |
| 556 | } |
| 557 | |
| 558 | static int gsm48_tx_gmm_det_ack_oldmsg(struct msgb *oldmsg, uint8_t force_stby) |
| 559 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 560 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DET ACK OLD"); |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 561 | |
| 562 | gmm_copy_id(msg, oldmsg); |
| 563 | return _tx_detach_ack(msg, force_stby, NULL); |
| 564 | } |
| 565 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 566 | /* Transmit Chapter 9.4.12 Identity Request */ |
Alexander Couzens | d4788cd | 2018-05-02 22:32:19 +0200 | [diff] [blame] | 567 | int gsm48_tx_gmm_id_req(struct sgsn_mm_ctx *mm, uint8_t id_type) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 568 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 569 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ID REQ"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 570 | struct gsm48_hdr *gh; |
| 571 | |
Harald Welte | b9845f9 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 572 | LOGMMCTXP(LOGL_DEBUG, mm, "<- GPRS IDENTITY REQUEST: mi_type=%s\n", |
| 573 | gsm48_mi_type_name(id_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 574 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 575 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 576 | |
| 577 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 578 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 579 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 580 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 581 | gh->data[0] = id_type & 0xf; |
| 582 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 583 | return gsm48_gmm_sendmsg(msg, 1, mm, false); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 584 | } |
| 585 | |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 586 | /* determine if the MS/UE supports R99 or later */ |
| 587 | static bool mmctx_is_r99(const struct sgsn_mm_ctx *mm) |
| 588 | { |
| 589 | if (mm->ms_network_capa.len < 1) |
| 590 | return false; |
| 591 | if (mm->ms_network_capa.buf[0] & 0x01) |
| 592 | return true; |
| 593 | return false; |
| 594 | } |
| 595 | |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 596 | /* 3GPP TS 24.008 Section 9.4.9: Authentication and Ciphering Request */ |
Alexander Couzens | d4788cd | 2018-05-02 22:32:19 +0200 | [diff] [blame] | 597 | int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 598 | const struct osmo_auth_vector *vec, |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 599 | uint8_t key_seq, bool force_standby) |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 600 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 601 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH CIPH REQ"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 602 | struct gsm48_hdr *gh; |
| 603 | struct gsm48_auth_ciph_req *acreq; |
Max | 4011e72 | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 604 | uint8_t *m_rand, *m_cksn, rbyte; |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 605 | int rc; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 606 | |
Neels Hofmeyr | 918a47b | 2018-04-30 21:59:34 +0200 | [diff] [blame] | 607 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS AUTH AND CIPHERING REQ (rand = %s," |
| 608 | " mmctx_is_r99=%d, vec->auth_types=0x%x", |
| 609 | osmo_hexdump(vec->rand, sizeof(vec->rand)), |
| 610 | mmctx_is_r99(mm), vec->auth_types); |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 611 | if (mmctx_is_r99(mm) && vec |
| 612 | && (vec->auth_types & OSMO_AUTH_TYPE_UMTS)) { |
| 613 | LOGPC(DMM, LOGL_INFO, ", autn = %s)\n", |
| 614 | osmo_hexdump(vec->autn, sizeof(vec->autn))); |
| 615 | } else |
| 616 | LOGPC(DMM, LOGL_INFO, ")\n"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 617 | |
| 618 | mmctx2msgid(msg, mm); |
| 619 | |
| 620 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 621 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 622 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; |
| 623 | |
| 624 | acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 625 | acreq->ciph_alg = mm->ciph_algo & 0xf; |
| 626 | /* § 10.5.5.10: */ |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 627 | acreq->imeisv_req = 0x1; |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 628 | /* § 10.5.5.7: */ |
| 629 | acreq->force_stby = force_standby; |
Max | 4011e72 | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 630 | /* 3GPP TS 24.008 § 10.5.5.19: */ |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 631 | rc = osmo_get_rand_id(&rbyte, 1); |
| 632 | if (rc < 0) { |
| 633 | LOGP(DMM, LOGL_ERROR, "osmo_get_rand_id() failed for A&C ref: %s\n", strerror(-rc)); |
| 634 | return rc; |
| 635 | } |
| 636 | |
| 637 | acreq->ac_ref_nr = rbyte; |
Max | 4011e72 | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 638 | mm->ac_ref_nr_used = acreq->ac_ref_nr; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 639 | |
| 640 | /* Only if authentication is requested we need to set RAND + CKSN */ |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 641 | if (vec) { |
| 642 | m_rand = msgb_put(msg, sizeof(vec->rand) + 1); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 643 | m_rand[0] = GSM48_IE_GMM_AUTH_RAND; |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 644 | memcpy(m_rand + 1, vec->rand, sizeof(vec->rand)); |
| 645 | |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 646 | /* § 10.5.1.2: */ |
Jacob Erlbeck | 65d8273 | 2014-12-01 10:36:17 +0100 | [diff] [blame] | 647 | m_cksn = msgb_put(msg, 1); |
| 648 | m_cksn[0] = (GSM48_IE_GMM_CIPH_CKSN << 4) | (key_seq & 0x07); |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 649 | |
| 650 | /* A Release99 or higher MS/UE must be able to handle |
| 651 | * the optional AUTN IE. If a classic GSM SIM is |
| 652 | * inserted, it will simply ignore AUTN and just use |
| 653 | * RAND */ |
| 654 | if (mmctx_is_r99(mm) && |
| 655 | (vec->auth_types & OSMO_AUTH_TYPE_UMTS)) { |
| 656 | msgb_tlv_put(msg, GSM48_IE_GMM_AUTN, |
| 657 | sizeof(vec->autn), vec->autn); |
| 658 | } |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 659 | } |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 660 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 661 | return gsm48_gmm_sendmsg(msg, 1, mm, false); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | /* Section 9.4.11: Authentication and Ciphering Reject */ |
| 665 | static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) |
| 666 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 667 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH CIPH REJ"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 668 | struct gsm48_hdr *gh; |
| 669 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 670 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS AUTH AND CIPH REJECT\n"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 671 | |
| 672 | mmctx2msgid(msg, mm); |
| 673 | |
| 674 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 675 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 676 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; |
| 677 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 678 | return gsm48_gmm_sendmsg(msg, 0, mm, false); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 679 | } |
| 680 | |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 681 | /* check if the received authentication response matches */ |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 682 | static enum osmo_sub_auth_type check_auth_resp(struct sgsn_mm_ctx *ctx, |
| 683 | bool is_utran, |
| 684 | const struct osmo_auth_vector *vec, |
| 685 | const uint8_t *res, uint8_t res_len) |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 686 | { |
| 687 | const uint8_t *expect_res; |
| 688 | uint8_t expect_res_len; |
| 689 | enum osmo_sub_auth_type expect_type; |
| 690 | const char *expect_str; |
| 691 | |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 692 | /* On UTRAN (3G) we always expect UMTS AKA. On GERAN (2G) we sent AUTN |
| 693 | * and expect UMTS AKA if there is R99 capability and our vector |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 694 | * supports UMTS AKA, otherwise we expect GSM AKA. |
| 695 | * However, on GERAN, even if we sent a UMTS AKA Authentication Request, the MS may decide to |
| 696 | * instead reply with a GSM AKA SRES response. */ |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 697 | if (is_utran |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 698 | || (mmctx_is_r99(ctx) && (vec->auth_types & OSMO_AUTH_TYPE_UMTS) |
| 699 | && (res_len > sizeof(vec->sres)))) { |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 700 | expect_type = OSMO_AUTH_TYPE_UMTS; |
| 701 | expect_str = "UMTS RES"; |
| 702 | expect_res = vec->res; |
| 703 | expect_res_len = vec->res_len; |
| 704 | } else { |
| 705 | expect_type = OSMO_AUTH_TYPE_GSM; |
| 706 | expect_str = "GSM SRES"; |
| 707 | expect_res = vec->sres; |
| 708 | expect_res_len = sizeof(vec->sres); |
| 709 | } |
Pau Espin Pedrol | d04e669 | 2018-01-07 18:14:12 +0100 | [diff] [blame] | 710 | |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 711 | if (!(vec->auth_types & expect_type)) { |
| 712 | LOGMMCTXP(LOGL_ERROR, ctx, "Auth error: auth vector does" |
| 713 | " not provide the expected auth type:" |
| 714 | " expected %s = 0x%x, auth_types are 0x%x\n", |
| 715 | expect_str, expect_type, vec->auth_types); |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 716 | return OSMO_AUTH_TYPE_NONE; |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | if (!res) |
| 720 | goto auth_mismatch; |
| 721 | |
| 722 | if (res_len != expect_res_len) |
| 723 | goto auth_mismatch; |
| 724 | |
| 725 | if (memcmp(res, expect_res, res_len) != 0) |
| 726 | goto auth_mismatch; |
| 727 | |
| 728 | /* Authorized! */ |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 729 | return expect_type; |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 730 | |
| 731 | auth_mismatch: |
| 732 | LOGMMCTXP(LOGL_ERROR, ctx, "Auth mismatch: expected %s = %s\n", |
| 733 | expect_str, osmo_hexdump_nospc(expect_res, expect_res_len)); |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 734 | return OSMO_AUTH_TYPE_NONE; |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 735 | } |
| 736 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 737 | /* Section 9.4.10: Authentication and Ciphering Response */ |
| 738 | static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, |
| 739 | struct msgb *msg) |
| 740 | { |
| 741 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 742 | struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; |
| 743 | struct tlv_parsed tp; |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 744 | struct gsm_auth_tuple *at; |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 745 | const char *res_name = "(no response)"; |
| 746 | uint8_t res[16]; |
| 747 | uint8_t res_len; |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 748 | int rc; |
| 749 | |
| 750 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH RESPONSE\n"); |
| 751 | |
| 752 | if (ctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 753 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 754 | "Unexpected Auth & Ciph Response (ignored)\n"); |
| 755 | return 0; |
| 756 | } |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 757 | |
Max | 4011e72 | 2016-07-05 15:19:12 +0200 | [diff] [blame] | 758 | if (acr->ac_ref_nr != ctx->ac_ref_nr_used) { |
| 759 | LOGMMCTXP(LOGL_NOTICE, ctx, "Reference mismatch for Auth & Ciph" |
| 760 | " Response: %u received, %u expected\n", |
| 761 | acr->ac_ref_nr, ctx->ac_ref_nr_used); |
| 762 | return 0; |
| 763 | } |
| 764 | |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 765 | /* Stop T3360 */ |
| 766 | mmctx_timer_stop(ctx, 3360); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 767 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 768 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 769 | (msg->data + msg->len) - acr->data, 0, 0); |
| 770 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 771 | if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 772 | !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV) || |
| 773 | TLVP_LEN(&tp,GSM48_IE_GMM_AUTH_SRES) != 4) { |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 774 | /* TODO: missing mandatory IE, return STATUS or REJ? */ |
| 775 | LOGMMCTXP(LOGL_ERROR, ctx, "Missing mandantory IE\n"); |
| 776 | return -EINVAL; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 777 | } |
| 778 | |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 779 | /* Start with the good old 4-byte SRES */ |
| 780 | memcpy(res, TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), 4); |
| 781 | res_len = 4; |
| 782 | res_name = "GSM SRES"; |
| 783 | |
| 784 | /* Append extended RES as part of UMTS AKA, if any */ |
| 785 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_RES_EXT)) { |
| 786 | unsigned int l = TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_RES_EXT); |
| 787 | if (l > sizeof(res)-4) |
| 788 | l = sizeof(res)-4; |
| 789 | memcpy(res+4, TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_RES_EXT), l); |
| 790 | res_len += l; |
| 791 | res_name = "UMTS RES"; |
| 792 | } |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 793 | |
| 794 | at = &ctx->auth_triplet; |
| 795 | |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 796 | LOGMMCTXP(LOGL_DEBUG, ctx, "checking auth: received %s = %s\n", |
| 797 | res_name, osmo_hexdump(res, res_len)); |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 798 | ctx->sec_ctx = check_auth_resp(ctx, false, &at->vec, res, res_len); |
| 799 | if (!sgsn_mm_ctx_is_authenticated(ctx)) { |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 800 | rc = gsm48_tx_gmm_auth_ciph_rej(ctx); |
| 801 | mm_ctx_cleanup_free(ctx, "GPRS AUTH AND CIPH REJECT"); |
| 802 | return rc; |
| 803 | } |
| 804 | |
Daniel Willmann | 3ecfbbb | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 805 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu) |
| 806 | ctx->iu.new_key = 1; |
| 807 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 808 | /* FIXME: enable LLC cipheirng */ |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 809 | |
| 810 | /* Check if we can let the mobile station enter */ |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 811 | return osmo_fsm_inst_dispatch(ctx->gmm_att_req.fsm, E_AUTH_RESP_RECV_SUCCESS, NULL); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 812 | } |
| 813 | |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 814 | /* Section 9.4.10: Authentication and Ciphering Failure */ |
| 815 | static int gsm48_rx_gmm_auth_ciph_fail(struct sgsn_mm_ctx *ctx, |
| 816 | struct msgb *msg) |
| 817 | { |
| 818 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 819 | struct tlv_parsed tp; |
| 820 | const uint8_t gmm_cause = gh->data[0]; |
| 821 | const uint8_t *auts; |
| 822 | int rc; |
| 823 | |
| 824 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH FAILURE (cause = %s)\n", |
| 825 | get_value_string(gsm48_gmm_cause_names, gmm_cause)); |
| 826 | |
| 827 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, gh->data+1, msg->len - 1, 0, 0); |
| 828 | |
| 829 | /* Only if GMM cause is present and the AUTS is provided, we can |
| 830 | * start re-sync procedure */ |
| 831 | if (gmm_cause == GMM_CAUSE_SYNC_FAIL && |
| 832 | TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR)) { |
| 833 | if (TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR) != 14) { |
| 834 | LOGMMCTXP(LOGL_ERROR, ctx, "AUTS IE has wrong size:" |
| 835 | " expected %d, got %u\n", 14, |
| 836 | TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR)); |
| 837 | return -EINVAL; |
| 838 | } |
| 839 | auts = TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_FAIL_PAR); |
| 840 | |
| 841 | LOGMMCTXP(LOGL_INFO, ctx, |
| 842 | "R99 AUTHENTICATION SYNCH (AUTS = %s)\n", |
| 843 | osmo_hexdump_nospc(auts, 14)); |
| 844 | |
| 845 | /* make sure we'll refresh the auth_triplet in |
| 846 | * sgsn_auth_update() */ |
| 847 | ctx->auth_triplet.key_seq = GSM_KEY_SEQ_INVAL; |
| 848 | |
| 849 | /* make sure we'll retry authentication after the resync */ |
| 850 | ctx->auth_state = SGSN_AUTH_UMTS_RESYNC; |
| 851 | |
| 852 | /* Send AUTS to HLR and wait for new Auth Info Result */ |
| 853 | rc = gprs_subscr_request_auth_info(ctx, auts, |
| 854 | ctx->auth_triplet.vec.rand); |
| 855 | if (!rc) |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 856 | return osmo_fsm_inst_dispatch(ctx->gmm_att_req.fsm, E_AUTH_RESP_RECV_RESYNC, NULL); |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 857 | /* on error, fall through to send a reject */ |
| 858 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 859 | "Sending AUTS to HLR failed (rc = %d)\n", rc); |
| 860 | } |
| 861 | |
| 862 | LOGMMCTXP(LOGL_NOTICE, ctx, "Authentication failed\n"); |
| 863 | rc = gsm48_tx_gmm_auth_ciph_rej(ctx); |
| 864 | mm_ctx_cleanup_free(ctx, "GPRS AUTH FAILURE"); |
| 865 | return rc; |
| 866 | } |
| 867 | |
Alexander Couzens | 8007be4 | 2018-05-14 06:48:24 +0200 | [diff] [blame] | 868 | void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx) |
Holger Hans Peter Freyther | 20de3ae | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 869 | { |
| 870 | struct gsm_mncc_number called; |
| 871 | uint8_t msisdn[sizeof(ctx->subscr->sgsn_data->msisdn) + 1]; |
| 872 | |
| 873 | /* Convert MSISDN from encoded to string.. */ |
| 874 | if (!ctx->subscr) |
| 875 | return; |
| 876 | |
| 877 | if (ctx->subscr->sgsn_data->msisdn_len < 1) |
| 878 | return; |
| 879 | |
| 880 | /* prepare the data for the decoder */ |
| 881 | memset(&called, 0, sizeof(called)); |
| 882 | msisdn[0] = ctx->subscr->sgsn_data->msisdn_len; |
| 883 | memcpy(&msisdn[1], ctx->subscr->sgsn_data->msisdn, |
| 884 | ctx->subscr->sgsn_data->msisdn_len); |
| 885 | |
| 886 | /* decode the string now */ |
| 887 | gsm48_decode_called(&called, msisdn); |
| 888 | |
| 889 | /* Prepend a '+' for international numbers */ |
| 890 | if (called.plan == 1 && called.type == 1) { |
| 891 | ctx->msisdn[0] = '+'; |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 892 | osmo_strlcpy(&ctx->msisdn[1], called.number, |
| 893 | sizeof(ctx->msisdn)); |
Holger Hans Peter Freyther | 20de3ae | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 894 | } else { |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 895 | osmo_strlcpy(ctx->msisdn, called.number, sizeof(ctx->msisdn)); |
Holger Hans Peter Freyther | 20de3ae | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 896 | } |
| 897 | } |
| 898 | |
Alexander Couzens | 8007be4 | 2018-05-14 06:48:24 +0200 | [diff] [blame] | 899 | void extract_subscr_hlr(struct sgsn_mm_ctx *ctx) |
Holger Hans Peter Freyther | 8ee13e2 | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 900 | { |
| 901 | struct gsm_mncc_number called; |
| 902 | uint8_t hlr_number[sizeof(ctx->subscr->sgsn_data->hlr) + 1]; |
| 903 | |
| 904 | if (!ctx->subscr) |
| 905 | return; |
| 906 | |
| 907 | if (ctx->subscr->sgsn_data->hlr_len < 1) |
| 908 | return; |
| 909 | |
| 910 | /* prepare the data for the decoder */ |
| 911 | memset(&called, 0, sizeof(called)); |
| 912 | hlr_number[0] = ctx->subscr->sgsn_data->hlr_len; |
| 913 | memcpy(&hlr_number[1], ctx->subscr->sgsn_data->hlr, |
| 914 | ctx->subscr->sgsn_data->hlr_len); |
| 915 | |
| 916 | /* decode the string now */ |
| 917 | gsm48_decode_called(&called, hlr_number); |
| 918 | |
| 919 | if (called.plan != 1) { |
| 920 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 921 | "Numbering plan(%d) not allowed\n", |
| 922 | called.plan); |
| 923 | return; |
| 924 | } |
| 925 | |
| 926 | if (called.type != 1) { |
| 927 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 928 | "Numbering type(%d) not allowed\n", |
| 929 | called.type); |
| 930 | return; |
| 931 | } |
| 932 | |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 933 | osmo_strlcpy(ctx->hlr, called.number, sizeof(ctx->hlr)); |
Holger Hans Peter Freyther | 8ee13e2 | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 934 | } |
| 935 | |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 936 | #ifdef BUILD_IU |
| 937 | /* Chapter 9.4.21: Service accept */ |
| 938 | static int gsm48_tx_gmm_service_ack(struct sgsn_mm_ctx *mm) |
| 939 | { |
| 940 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE ACK"); |
| 941 | struct gsm48_hdr *gh; |
| 942 | |
| 943 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS SERVICE ACCEPT (P-TMSI=0x%08x)\n", mm->p_tmsi); |
| 944 | |
| 945 | mmctx2msgid(msg, mm); |
| 946 | |
| 947 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 948 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 949 | gh->msg_type = GSM48_MT_GMM_SERVICE_ACK; |
| 950 | |
| 951 | /* Optional: PDP context status */ |
| 952 | /* Optional: MBMS context status */ |
| 953 | |
| 954 | return gsm48_gmm_sendmsg(msg, 0, mm, false); |
| 955 | } |
| 956 | #endif |
| 957 | |
| 958 | /* Chapter 9.4.22: Service reject */ |
| 959 | static int _tx_gmm_service_rej(struct msgb *msg, uint8_t gmm_cause, |
| 960 | const struct sgsn_mm_ctx *mm) |
| 961 | { |
| 962 | struct gsm48_hdr *gh; |
| 963 | |
| 964 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS SERVICE REJECT: %s\n", |
| 965 | get_value_string(gsm48_gmm_cause_names, gmm_cause)); |
| 966 | |
| 967 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 968 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 969 | gh->msg_type = GSM48_MT_GMM_SERVICE_REJ; |
| 970 | gh->data[0] = gmm_cause; |
| 971 | |
| 972 | return gsm48_gmm_sendmsg(msg, 0, NULL, true); |
| 973 | } |
| 974 | static int gsm48_tx_gmm_service_rej_oldmsg(const struct msgb *old_msg, |
| 975 | uint8_t gmm_cause) |
| 976 | { |
| 977 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE REJ OLD"); |
| 978 | gmm_copy_id(msg, old_msg); |
| 979 | return _tx_gmm_service_rej(msg, gmm_cause, NULL); |
| 980 | } |
| 981 | #if 0 |
| 982 | -- currently unused -- |
| 983 | static int gsm48_tx_gmm_service_rej(struct sgsn_mm_ctx *mm, |
| 984 | uint8_t gmm_cause) |
| 985 | { |
| 986 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERVICE REJ"); |
| 987 | mmctx2msgid(msg, mm); |
| 988 | return _tx_gmm_service_rej(msg, gmm_cause, mm); |
| 989 | } |
| 990 | #endif |
| 991 | |
| 992 | static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm); |
| 993 | |
| 994 | #ifdef BUILD_IU |
Neels Hofmeyr | 158de36 | 2017-07-20 14:41:40 +0200 | [diff] [blame] | 995 | /* Send RAB activation requests for all PDP contexts */ |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 996 | void activate_pdp_rabs(struct sgsn_mm_ctx *ctx) |
| 997 | { |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 998 | struct sgsn_pdp_ctx *pdp; |
Neels Hofmeyr | 158de36 | 2017-07-20 14:41:40 +0200 | [diff] [blame] | 999 | if (ctx->ran_type != MM_CTX_T_UTRAN_Iu) |
| 1000 | return; |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1001 | llist_for_each_entry(pdp, &ctx->pdp_list, list) { |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 1002 | iu_rab_act_ps(pdp->nsapi, pdp); |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1003 | } |
| 1004 | } |
| 1005 | #endif |
| 1006 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1007 | /* Check if we can already authorize a subscriber */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1008 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1009 | { |
Daniel Willmann | 3ecfbbb | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 1010 | #ifdef BUILD_IU |
| 1011 | int rc; |
| 1012 | #endif |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1013 | #ifndef PTMSI_ALLOC |
| 1014 | struct sgsn_signal_data sig_data; |
| 1015 | #endif |
| 1016 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1017 | /* Request IMSI and IMEI from the MS if they are unknown */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1018 | if (!strlen(ctx->imei)) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1019 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1020 | mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1021 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1022 | } |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1023 | if (!strlen(ctx->imsi)) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1024 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1025 | mmctx_timer_start(ctx, 3370, sgsn->cfg.timers.T3370); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1026 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1027 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1028 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1029 | /* All information required for authentication is available */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1030 | ctx->t3370_id_type = GSM_MI_TYPE_NONE; |
| 1031 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1032 | if (ctx->auth_state == SGSN_AUTH_UNKNOWN) { |
| 1033 | /* Request authorization, this leads to a call to |
Jacob Erlbeck | f951a01 | 2014-11-07 14:17:44 +0100 | [diff] [blame] | 1034 | * sgsn_auth_update which in turn calls |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1035 | * gsm0408_gprs_access_granted or gsm0408_gprs_access_denied */ |
| 1036 | |
Jacob Erlbeck | a0b6efb | 2014-11-13 10:48:39 +0100 | [diff] [blame] | 1037 | sgsn_auth_request(ctx); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1038 | /* Note that gsm48_gmm_authorize can be called recursively via |
| 1039 | * sgsn_auth_request iff ctx->auth_info changes to AUTH_ACCEPTED |
| 1040 | */ |
| 1041 | return 0; |
| 1042 | } |
| 1043 | |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 1044 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE |
| 1045 | && !sgsn_mm_ctx_is_authenticated(ctx)) { |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 1046 | struct gsm_auth_tuple *at = &ctx->auth_triplet; |
| 1047 | |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1048 | mmctx_timer_start(ctx, 3360, sgsn->cfg.timers.T3360); |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 1049 | return gsm48_tx_gmm_auth_ciph_req(ctx, &at->vec, at->key_seq, |
| 1050 | false); |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 1051 | } |
| 1052 | |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 1053 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && sgsn_mm_ctx_is_authenticated(ctx) && |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 1054 | ctx->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { |
| 1055 | /* Check again for authorization */ |
| 1056 | sgsn_auth_request(ctx); |
| 1057 | return 0; |
| 1058 | } |
| 1059 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1060 | if (ctx->auth_state != SGSN_AUTH_ACCEPTED) { |
| 1061 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1062 | "authorization is denied, aborting procedure\n"); |
| 1063 | return -EACCES; |
Jacob Erlbeck | 0c06f98 | 2014-10-29 22:12:20 +0100 | [diff] [blame] | 1064 | } |
| 1065 | |
| 1066 | /* The MS is authorized */ |
Daniel Willmann | 3ecfbbb | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 1067 | #ifdef BUILD_IU |
| 1068 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu && !ctx->iu.ue_ctx->integrity_active) { |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 1069 | rc = ranap_iu_tx_sec_mode_cmd(ctx->iu.ue_ctx, &ctx->auth_triplet.vec, 0, ctx->iu.new_key); |
Daniel Willmann | 3ecfbbb | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 1070 | ctx->iu.new_key = 0; |
| 1071 | return rc; |
| 1072 | } |
| 1073 | #endif |
Jacob Erlbeck | 0c06f98 | 2014-10-29 22:12:20 +0100 | [diff] [blame] | 1074 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1075 | switch (ctx->pending_req) { |
| 1076 | case 0: |
| 1077 | LOGMMCTXP(LOGL_INFO, ctx, |
| 1078 | "no pending request, authorization completed\n"); |
| 1079 | break; |
| 1080 | case GSM48_MT_GMM_ATTACH_REQ: |
Daniel Willmann | fac9758 | 2016-05-21 00:21:15 +0200 | [diff] [blame] | 1081 | ctx->pending_req = 0; |
Holger Hans Peter Freyther | 20de3ae | 2015-05-05 22:52:40 +0200 | [diff] [blame] | 1082 | |
| 1083 | extract_subscr_msisdn(ctx); |
Holger Hans Peter Freyther | 8ee13e2 | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 1084 | extract_subscr_hlr(ctx); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1085 | #ifdef PTMSI_ALLOC |
| 1086 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1087 | mmctx_timer_start(ctx, 3350, sgsn->cfg.timers.T3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1088 | ctx->t3350_mode = GMM_T3350_MODE_ATT; |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1089 | #else |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1090 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1091 | sig_data.mm = mmctx; |
| 1092 | osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 1093 | ctx->gmm_state = GMM_REGISTERED_NORMAL; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1094 | #endif |
| 1095 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1096 | return gsm48_tx_gmm_att_ack(ctx); |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1097 | #ifdef BUILD_IU |
| 1098 | case GSM48_MT_GMM_SERVICE_REQ: |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1099 | ctx->pending_req = 0; |
Daniel Willmann | c17cdb4 | 2016-05-11 12:42:54 +0200 | [diff] [blame] | 1100 | mmctx_set_pmm_state(ctx, PMM_CONNECTED); |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1101 | rc = gsm48_tx_gmm_service_ack(ctx); |
| 1102 | |
Daniel Willmann | af24172 | 2016-05-21 00:35:41 +0200 | [diff] [blame] | 1103 | if (ctx->iu.service.type != GPRS_SERVICE_T_SIGNALLING) |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1104 | activate_pdp_rabs(ctx); |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1105 | |
| 1106 | return rc; |
| 1107 | #endif |
| 1108 | case GSM48_MT_GMM_RA_UPD_REQ: |
| 1109 | ctx->pending_req = 0; |
| 1110 | /* Send RA UPDATE ACCEPT */ |
| 1111 | return gsm48_tx_gmm_ra_upd_ack(ctx); |
| 1112 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1113 | default: |
| 1114 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 1115 | "only Attach Request is supported yet, " |
| 1116 | "got request type %u\n", ctx->pending_req); |
| 1117 | break; |
| 1118 | } |
| 1119 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1120 | return 0; |
| 1121 | } |
| 1122 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 1123 | void gsm0408_gprs_authenticate(struct sgsn_mm_ctx *ctx) |
| 1124 | { |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 1125 | ctx->sec_ctx = OSMO_AUTH_TYPE_NONE; |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 1126 | |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1127 | if (ctx->gmm_att_req.fsm->state != ST_INIT) |
| 1128 | osmo_fsm_inst_dispatch(ctx->gmm_att_req.fsm, E_VLR_ANSWERED, (void *) 0); |
| 1129 | else |
| 1130 | gsm48_gmm_authorize(ctx); |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 1131 | } |
| 1132 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1133 | void gsm0408_gprs_access_granted(struct sgsn_mm_ctx *ctx) |
| 1134 | { |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 1135 | switch (ctx->gmm_state) { |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1136 | case GMM_COMMON_PROC_INIT: |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 1137 | LOGMMCTXP(LOGL_NOTICE, ctx, |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1138 | "Authorized, continuing procedure, IMSI=%s\n", |
| 1139 | ctx->imsi); |
| 1140 | /* Continue with the authorization */ |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1141 | if (ctx->gmm_att_req.fsm->state != ST_INIT) |
| 1142 | osmo_fsm_inst_dispatch(ctx->gmm_att_req.fsm, E_VLR_ANSWERED, (void *) 0); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1143 | break; |
| 1144 | default: |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 1145 | LOGMMCTXP(LOGL_INFO, ctx, |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1146 | "Authorized, ignored, IMSI=%s\n", |
| 1147 | ctx->imsi); |
| 1148 | } |
| 1149 | } |
| 1150 | |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1151 | void gsm0408_gprs_access_denied(struct sgsn_mm_ctx *ctx, int gmm_cause) |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1152 | { |
Jacob Erlbeck | d6267d1 | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 1153 | if (gmm_cause == SGSN_ERROR_CAUSE_NONE) |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1154 | gmm_cause = GMM_CAUSE_GPRS_NOTALLOWED; |
| 1155 | |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 1156 | switch (ctx->gmm_state) { |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1157 | case GMM_COMMON_PROC_INIT: |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1158 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1159 | "Not authorized, rejecting ATTACH REQUEST " |
| 1160 | "with cause '%s' (%d)\n", |
| 1161 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 1162 | gmm_cause); |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1163 | if (ctx->gmm_att_req.fsm->state != ST_INIT) |
| 1164 | osmo_fsm_inst_dispatch(ctx->gmm_att_req.fsm, E_REJECT, (void *) (long) gmm_cause); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1165 | break; |
| 1166 | case GMM_REGISTERED_NORMAL: |
| 1167 | case GMM_REGISTERED_SUSPENDED: |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1168 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1169 | "Authorization lost, detaching " |
| 1170 | "with cause '%s' (%d)\n", |
| 1171 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 1172 | gmm_cause); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1173 | gsm48_tx_gmm_detach_req( |
Alexander Couzens | 13c1312 | 2018-05-22 20:28:18 +0200 | [diff] [blame] | 1174 | ctx, GPRS_DET_T_MT_IMSI, gmm_cause); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1175 | |
| 1176 | mm_ctx_cleanup_free(ctx, "auth lost"); |
| 1177 | break; |
| 1178 | default: |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1179 | LOGMMCTXP(LOGL_INFO, ctx, |
| 1180 | "Authorization lost, cause is '%s' (%d)\n", |
| 1181 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 1182 | gmm_cause); |
| 1183 | mm_ctx_cleanup_free(ctx, "auth lost"); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 1184 | } |
| 1185 | } |
| 1186 | |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1187 | void gsm0408_gprs_access_cancelled(struct sgsn_mm_ctx *ctx, int gmm_cause) |
Jacob Erlbeck | 98647ca | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 1188 | { |
Jacob Erlbeck | d6267d1 | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 1189 | if (gmm_cause != SGSN_ERROR_CAUSE_NONE) { |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1190 | LOGMMCTXP(LOGL_INFO, ctx, |
| 1191 | "Cancelled with cause '%s' (%d), deleting context\n", |
| 1192 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 1193 | gmm_cause); |
| 1194 | gsm0408_gprs_access_denied(ctx, gmm_cause); |
| 1195 | return; |
Jacob Erlbeck | 98647ca | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 1196 | } |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 1197 | |
| 1198 | LOGMMCTXP(LOGL_INFO, ctx, "Cancelled, deleting context silently\n"); |
Jacob Erlbeck | 98647ca | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 1199 | mm_ctx_cleanup_free(ctx, "access cancelled"); |
| 1200 | } |
| 1201 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1202 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1203 | static int gsm48_rx_gmm_id_resp(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1204 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1205 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1206 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1207 | long mi_typel = mi_type; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1208 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1209 | |
| 1210 | gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1211 | if (!ctx) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1212 | DEBUGP(DMM, "from unknown TLLI 0x%08x?!? This should not happen\n", msgb_tlli(msg)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1213 | return -EINVAL; |
| 1214 | } |
| 1215 | |
Harald Welte | b9845f9 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1216 | LOGMMCTXP(LOGL_DEBUG, ctx, "-> GMM IDENTITY RESPONSE: MI(%s)=%s\n", |
| 1217 | gsm48_mi_type_name(mi_type), mi_string); |
Daniel Willmann | f8070f4 | 2014-09-23 18:48:44 +0200 | [diff] [blame] | 1218 | |
Jacob Erlbeck | fb26c60 | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 1219 | if (ctx->t3370_id_type == GSM_MI_TYPE_NONE) { |
| 1220 | LOGMMCTXP(LOGL_NOTICE, ctx, |
Harald Welte | b9845f9 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1221 | "Got unexpected IDENTITY RESPONSE: MI(%s)=%s, " |
Jacob Erlbeck | fb26c60 | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 1222 | "ignoring message\n", |
Harald Welte | b9845f9 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1223 | gsm48_mi_type_name(mi_type), mi_string); |
Jacob Erlbeck | fb26c60 | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 1224 | return -EINVAL; |
| 1225 | } |
| 1226 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1227 | if (mi_type == ctx->t3370_id_type) |
| 1228 | mmctx_timer_stop(ctx, 3370); |
| 1229 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1230 | switch (mi_type) { |
| 1231 | case GSM_MI_TYPE_IMSI: |
| 1232 | /* we already have a mm context with current TLLI, but no |
| 1233 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 1234 | * this initial context with data from the HLR */ |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 1235 | if (strlen(ctx->imsi) == 0) { |
| 1236 | /* Check if we already have a MM context for this IMSI */ |
| 1237 | struct sgsn_mm_ctx *ictx; |
| 1238 | ictx = sgsn_mm_ctx_by_imsi(mi_string); |
| 1239 | if (ictx) { |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 1240 | /* Handle it like in gsm48_rx_gmm_det_req, |
| 1241 | * except that no messages are sent to the BSS */ |
| 1242 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1243 | LOGMMCTXP(LOGL_NOTICE, ctx, "Deleting old MM Context for same IMSI " |
| 1244 | "p_tmsi_old=0x%08x\n", |
| 1245 | ictx->p_tmsi); |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 1246 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 1247 | mm_ctx_cleanup_free(ictx, "GPRS IMSI re-use"); |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 1248 | } |
| 1249 | } |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 1250 | osmo_strlcpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1251 | break; |
| 1252 | case GSM_MI_TYPE_IMEI: |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 1253 | osmo_strlcpy(ctx->imei, mi_string, sizeof(ctx->imei)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1254 | break; |
| 1255 | case GSM_MI_TYPE_IMEISV: |
| 1256 | break; |
| 1257 | } |
| 1258 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1259 | /* Check if we can let the mobile station enter */ |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1260 | return osmo_fsm_inst_dispatch(ctx->gmm_att_req.fsm, E_IDEN_RESP_RECV, (void *)mi_typel); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1261 | } |
| 1262 | |
Max | 86e04df | 2017-10-09 16:21:31 +0200 | [diff] [blame] | 1263 | /* Allocate a new P-TMSI and change context state */ |
| 1264 | static inline void ptmsi_update(struct sgsn_mm_ctx *ctx) |
| 1265 | { |
| 1266 | uint32_t ptmsi; |
| 1267 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 1268 | if (ctx->gmm_state != GMM_COMMON_PROC_INIT) { |
| 1269 | ptmsi = sgsn_alloc_ptmsi(); |
Max | 7ad8fa6 | 2017-10-09 16:26:43 +0200 | [diff] [blame] | 1270 | if (ptmsi != GSM_RESERVED_TMSI) { |
| 1271 | ctx->p_tmsi_old = ctx->p_tmsi; |
| 1272 | ctx->p_tmsi = ptmsi; |
| 1273 | } else |
| 1274 | LOGMMCTXP(LOGL_ERROR, ctx, "P-TMSI allocation failure: using old one.\n"); |
Max | 86e04df | 2017-10-09 16:21:31 +0200 | [diff] [blame] | 1275 | } |
| 1276 | ctx->gmm_state = GMM_COMMON_PROC_INIT; |
| 1277 | } |
| 1278 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1279 | /* Section 9.4.1 Attach request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1280 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 1281 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1282 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1283 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1284 | uint8_t *cur = gh->data, *msnc, *mi, *ms_ra_acc_cap; |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1285 | uint8_t msnc_len, att_type, mi_len, mi_type, ms_ra_acc_cap_len; |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1286 | uint16_t drx_par; |
| 1287 | uint32_t tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1288 | char mi_string[GSM48_MI_SIZE]; |
| 1289 | struct gprs_ra_id ra_id; |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1290 | uint16_t cid = 0; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1291 | enum gsm48_gmm_cause reject_cause; |
| 1292 | int rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1293 | |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 1294 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM ATTACH REQUEST "); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1295 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ATTACH_REQUEST]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1296 | |
| 1297 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 1298 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 1299 | * or with random TLLI. */ |
| 1300 | |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 1301 | if (!MSG_IU_UE_CTX(msg)) { |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1302 | /* Gb mode */ |
| 1303 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 1304 | } else { |
| 1305 | #ifdef BUILD_IU |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 1306 | ra_id = MSG_IU_UE_CTX(msg)->ra_id; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 1307 | #else |
| 1308 | LOGMMCTXP(LOGL_ERROR, ctx, "Cannot handle Iu Attach Request, built without Iu support\n"); |
| 1309 | return -ENOTSUP; |
| 1310 | #endif |
| 1311 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1312 | |
| 1313 | /* MS network capability 10.5.5.12 */ |
| 1314 | msnc_len = *cur++; |
| 1315 | msnc = cur; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 1316 | if (msnc_len > sizeof(ctx->ms_network_capa.buf)) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1317 | goto err_inval; |
| 1318 | cur += msnc_len; |
| 1319 | |
Daniel Willmann | 746c789 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1320 | /* TODO: In iu mode - handle follow-on request */ |
| 1321 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1322 | /* aTTACH Type 10.5.5.2 */ |
Daniel Willmann | 746c789 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1323 | att_type = *cur++ & 0x07; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1324 | |
| 1325 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1326 | drx_par = *cur++ << 8; |
| 1327 | drx_par |= *cur++; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1328 | |
| 1329 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 1330 | mi_len = *cur++; |
| 1331 | mi = cur; |
| 1332 | if (mi_len > 8) |
| 1333 | goto err_inval; |
| 1334 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 1335 | cur += mi_len; |
| 1336 | |
| 1337 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 1338 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1339 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 1340 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1341 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1342 | /* Old routing area identification 10.5.5.15. Skip it */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1343 | cur += 6; |
| 1344 | |
| 1345 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1346 | ms_ra_acc_cap_len = *cur++; |
| 1347 | ms_ra_acc_cap = cur; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 1348 | if (ms_ra_acc_cap_len > sizeof(ctx->ms_radio_access_capa.buf)) |
Harald Welte | c48ac47 | 2010-07-03 21:20:06 +0200 | [diff] [blame] | 1349 | goto err_inval; |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1350 | cur += ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1351 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1352 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 1353 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1354 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 1355 | |
| 1356 | switch (mi_type) { |
| 1357 | case GSM_MI_TYPE_IMSI: |
| 1358 | /* Try to find MM context based on IMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1359 | if (!ctx) |
| 1360 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1361 | if (!ctx) { |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 1362 | if (MSG_IU_UE_CTX(msg)) |
| 1363 | ctx = sgsn_mm_ctx_alloc_iu(MSG_IU_UE_CTX(msg)); |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1364 | else |
Alexander Couzens | 2b5fb8e | 2017-02-04 06:01:00 +0100 | [diff] [blame] | 1365 | ctx = sgsn_mm_ctx_alloc_gb(0, &ra_id); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1366 | if (!ctx) { |
| 1367 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 1368 | goto rejected; |
| 1369 | } |
Neels Hofmeyr | 93bafb6 | 2017-01-13 03:12:08 +0100 | [diff] [blame] | 1370 | osmo_strlcpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1371 | } |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1372 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1373 | ctx->gb.tlli = msgb_tlli(msg); |
| 1374 | ctx->gb.llme = llme; |
| 1375 | } |
Harald Welte | 68b99a4 | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 1376 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1377 | break; |
| 1378 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1379 | memcpy(&tmsi, mi+1, 4); |
| 1380 | tmsi = ntohl(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1381 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1382 | if (!ctx) |
| 1383 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1384 | if (!ctx) { |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 1385 | /* Allocate a context as most of our code expects one. |
| 1386 | * Context will not have an IMSI ultil ID RESP is received */ |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 1387 | if (MSG_IU_UE_CTX(msg)) |
| 1388 | ctx = sgsn_mm_ctx_alloc_iu(MSG_IU_UE_CTX(msg)); |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1389 | else |
Alexander Couzens | 2b5fb8e | 2017-02-04 06:01:00 +0100 | [diff] [blame] | 1390 | ctx = sgsn_mm_ctx_alloc_gb(msgb_tlli(msg), &ra_id); |
Neels Hofmeyr | aa7af4d | 2017-12-20 00:41:27 +0100 | [diff] [blame] | 1391 | if (!ctx) { |
| 1392 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 1393 | goto rejected; |
| 1394 | } |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1395 | ctx->p_tmsi = tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1396 | } |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1397 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1398 | ctx->gb.tlli = msgb_tlli(msg); |
| 1399 | ctx->gb.llme = llme; |
| 1400 | } |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1401 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1402 | break; |
| 1403 | default: |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 1404 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with " |
Harald Welte | b9845f9 | 2015-08-16 18:07:48 +0200 | [diff] [blame] | 1405 | "MI type %s\n", gsm48_mi_type_name(mi_type)); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1406 | reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; |
| 1407 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1408 | } |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1409 | /* Update MM Context with currient RA and Cell ID */ |
| 1410 | ctx->ra = ra_id; |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1411 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) |
| 1412 | ctx->gb.cell_id = cid; |
Daniel Willmann | 770f3e3 | 2016-05-21 00:31:12 +0200 | [diff] [blame] | 1413 | |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1414 | /* Update MM Context with other data */ |
| 1415 | ctx->drx_parms = drx_par; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 1416 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1417 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, |
| 1418 | ctx->ms_radio_access_capa.len); |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1419 | ctx->ms_network_capa.len = msnc_len; |
| 1420 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 1421 | if (!gprs_ms_net_cap_gea_supported(ctx->ms_network_capa.buf, msnc_len, |
| 1422 | ctx->ciph_algo)) { |
| 1423 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1424 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting ATTACH REQUEST with MI " |
| 1425 | "type %s because MS do not support required %s " |
| 1426 | "encryption\n", gsm48_mi_type_name(mi_type), |
| 1427 | get_value_string(gprs_cipher_names,ctx->ciph_algo)); |
| 1428 | goto rejected; |
| 1429 | } |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1430 | #ifdef PTMSI_ALLOC |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1431 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Max | 86e04df | 2017-10-09 16:21:31 +0200 | [diff] [blame] | 1432 | ptmsi_update(ctx); |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1433 | #endif |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1434 | |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1435 | if (ctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1436 | /* Even if there is no P-TMSI allocated, the MS will |
| 1437 | * switch from foreign TLLI to local TLLI */ |
| 1438 | ctx->gb.tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 1439 | |
| 1440 | /* Inform LLC layer about new TLLI but keep old active */ |
Neels Hofmeyr | aa4ed67 | 2018-04-22 19:29:41 +0200 | [diff] [blame] | 1441 | if (sgsn_mm_ctx_is_authenticated(ctx)) |
Max | 5aa5196 | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1442 | gprs_llme_copy_key(ctx, ctx->gb.llme); |
| 1443 | |
| 1444 | gprs_llgmm_assign(ctx->gb.llme, ctx->gb.tlli, ctx->gb.tlli_new); |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1445 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1446 | |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1447 | osmo_fsm_inst_dispatch(ctx->gmm_att_req.fsm, E_ATTACH_REQ_RECV, msg); |
| 1448 | return 0; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1449 | |
| 1450 | err_inval: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1451 | LOGPC(DMM, LOGL_INFO, "\n"); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1452 | reject_cause = GMM_CAUSE_SEM_INCORR_MSG; |
| 1453 | |
| 1454 | rejected: |
| 1455 | /* Send ATTACH REJECT */ |
| 1456 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1457 | "Rejecting Attach Request with cause '%s' (%d)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1458 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1459 | rc = gsm48_tx_gmm_att_rej_oldmsg(msg, reject_cause); |
| 1460 | if (ctx) |
| 1461 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJ"); |
Neels Hofmeyr | ceccd46 | 2017-12-20 16:21:45 +0100 | [diff] [blame] | 1462 | else if (llme) |
Max | 3955025 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1463 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1464 | |
| 1465 | return rc; |
| 1466 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1467 | } |
| 1468 | |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1469 | |
| 1470 | /* Checks if two attach request contain the IEs and IE values |
| 1471 | * return 0 if equal |
| 1472 | * return -1 if error |
| 1473 | * return 1 if unequal |
| 1474 | * |
| 1475 | * Only do a simple memcmp for now. |
| 1476 | */ |
| 1477 | int gprs_gmm_attach_req_ies(struct msgb *a, struct msgb *b) |
| 1478 | { |
| 1479 | struct gsm48_hdr *gh_a = (struct gsm48_hdr *) msgb_gmmh(a); |
| 1480 | struct gsm48_hdr *gh_b = (struct gsm48_hdr *) msgb_gmmh(b); |
| 1481 | |
| 1482 | #define GMM_ATTACH_REQ_LEN 26 |
| 1483 | |
| 1484 | /* there is the LLC FCS behind */ |
| 1485 | if (msgb_l3len(a) < GMM_ATTACH_REQ_LEN || msgb_l3len(b) < GMM_ATTACH_REQ_LEN) |
| 1486 | return -1; |
| 1487 | |
| 1488 | return !!memcmp(gh_a, gh_b, GMM_ATTACH_REQ_LEN); |
| 1489 | } |
| 1490 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1491 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1492 | static int gsm48_rx_gmm_det_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1493 | { |
| 1494 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1495 | uint8_t detach_type, power_off; |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1496 | int rc = 0; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1497 | |
| 1498 | detach_type = gh->data[0] & 0x7; |
| 1499 | power_off = gh->data[0] & 0x8; |
| 1500 | |
| 1501 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1502 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_DETACH_REQUEST]); |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1503 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1504 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 1505 | power_off ? "Power-off" : ""); |
| 1506 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1507 | /* Only send the Detach Accept (MO) if power off isn't indicated, |
Jacob Erlbeck | b9ab0d4 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1508 | * see 04.08, 4.7.4.1.2/3 for details */ |
| 1509 | if (!power_off) { |
| 1510 | /* force_stby = 0 */ |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1511 | if (ctx) |
| 1512 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 1513 | else |
| 1514 | rc = gsm48_tx_gmm_det_ack_oldmsg(msg, 0); |
Jacob Erlbeck | b9ab0d4 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1515 | } |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1516 | |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1517 | if (ctx) { |
| 1518 | struct sgsn_signal_data sig_data; |
| 1519 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1520 | sig_data.mm = ctx; |
| 1521 | osmo_signal_dispatch(SS_SGSN, S_SGSN_DETACH, &sig_data); |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1522 | mm_ctx_cleanup_free(ctx, "GPRS DETACH REQUEST"); |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1523 | } |
Jacob Erlbeck | 258ce3d | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 1524 | |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1525 | return rc; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1526 | } |
| 1527 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1528 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1529 | static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1530 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1531 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 UPD ACK"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1532 | struct gsm48_hdr *gh; |
| 1533 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1534 | uint8_t *mid; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1535 | |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1536 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_ACKED]); |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1537 | LOGMMCTXP(LOGL_INFO, mm, "<- ROUTING AREA UPDATE ACCEPT\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1538 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1539 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1540 | |
| 1541 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1542 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1543 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 1544 | |
| 1545 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 1546 | rua->force_stby = 0; /* not indicated */ |
| 1547 | rua->upd_result = 0; /* RA updated */ |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1548 | rua->ra_upd_timer = gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3312); |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1549 | |
Max | 25c65c3 | 2018-01-08 14:43:53 +0100 | [diff] [blame] | 1550 | gsm48_encode_ra(&rua->ra_id, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1551 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1552 | #if 0 |
| 1553 | /* Optional: P-TMSI signature */ |
| 1554 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 1555 | ptsig = msgb_put(msg, 3); |
| 1556 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 1557 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 1558 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 1559 | #endif |
| 1560 | |
| 1561 | #ifdef PTMSI_ALLOC |
| 1562 | /* Optional: Allocated P-TMSI */ |
| 1563 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 1564 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 1565 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 1566 | #endif |
| 1567 | |
Jacob Erlbeck | 8de9c48 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 1568 | /* Optional: Negotiated READY timer value */ |
| 1569 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1570 | gprs_secs_to_tmr_floor(sgsn->cfg.timers.T3314)); |
Jacob Erlbeck | 8de9c48 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 1571 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1572 | /* Option: MS ID, ... */ |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1573 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1574 | } |
| 1575 | |
| 1576 | /* Chapter 9.4.17: Routing area update reject */ |
Alexander Couzens | d4788cd | 2018-05-02 22:32:19 +0200 | [diff] [blame] | 1577 | int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1578 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 1579 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 RA UPD REJ"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1580 | struct gsm48_hdr *gh; |
| 1581 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1582 | LOGP(DMM, LOGL_NOTICE, "<- ROUTING AREA UPDATE REJECT\n"); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1583 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REJECT]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1584 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1585 | gmm_copy_id(msg, old_msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1586 | |
| 1587 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 1588 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1589 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 1590 | gh->data[0] = cause; |
| 1591 | gh->data[1] = 0; /* ? */ |
| 1592 | |
| 1593 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1594 | return gsm48_gmm_sendmsg(msg, 0, NULL, false); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1595 | } |
| 1596 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1597 | static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1598 | const uint8_t *pdp_status) |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1599 | { |
| 1600 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 1601 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 1602 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 1603 | * shall deactivate all those PDP contexts locally (without peer to |
| 1604 | * peer signalling between the MS and the network), which are not in SM |
| 1605 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 1606 | * being in state PDP-INACTIVE. */ |
| 1607 | |
| 1608 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1609 | if (pdp->nsapi < 8) { |
| 1610 | if (!(pdp_status[0] & (1 << pdp->nsapi))) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1611 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1612 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1613 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1614 | sgsn_delete_pdp_ctx(pdp); |
| 1615 | } |
| 1616 | } else { |
| 1617 | if (!(pdp_status[1] & (1 << (pdp->nsapi - 8)))) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1618 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1619 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1620 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1621 | sgsn_delete_pdp_ctx(pdp); |
| 1622 | } |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1623 | } |
| 1624 | } |
| 1625 | } |
| 1626 | |
efistokl | def0d94 | 2019-04-23 14:37:13 +0300 | [diff] [blame] | 1627 | /* 3GPP TS 24.008 Section 4.7.13.4 Service request procedure not accepted by the |
| 1628 | * network. Returns true if MS has active PDP contexts in pdp_status */ |
| 1629 | bool pdp_status_has_active_nsapis(const uint8_t *pdp_status, const size_t pdp_status_len) |
| 1630 | { |
| 1631 | size_t i; |
| 1632 | |
| 1633 | for (i = 0; i < pdp_status_len; i++) |
| 1634 | if (pdp_status[i] != 0) |
| 1635 | return true; |
| 1636 | |
| 1637 | return false; |
| 1638 | } |
| 1639 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1640 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1641 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1642 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1643 | { |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1644 | #ifndef PTMSI_ALLOC |
| 1645 | struct sgsn_signal_data sig_data; |
| 1646 | #endif |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1647 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1648 | uint8_t *cur = gh->data; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1649 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1650 | struct gprs_ra_id old_ra_id; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1651 | struct tlv_parsed tp; |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1652 | uint8_t upd_type; |
Philipp Maier | 6934a0f | 2017-01-25 12:19:08 +0100 | [diff] [blame] | 1653 | enum gsm48_gmm_cause reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1654 | int rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1655 | |
Daniel Willmann | 746c789 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1656 | /* TODO: In iu mode - handle follow-on request */ |
| 1657 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1658 | /* Update Type 10.5.5.18 */ |
Daniel Willmann | 746c789 | 2016-01-25 16:49:53 +0100 | [diff] [blame] | 1659 | upd_type = *cur++ & 0x07; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1660 | |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 1661 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_GPRS_ROUTING_AREA_REQUEST]); |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1662 | LOGP(DMM, LOGL_INFO, "-> GMM RA UPDATE REQUEST type=\"%s\"\n", |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1663 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1664 | |
| 1665 | /* Old routing area identification 10.5.5.15 */ |
| 1666 | gsm48_parse_ra(&old_ra_id, cur); |
| 1667 | cur += 6; |
| 1668 | |
| 1669 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1670 | ms_ra_acc_cap_len = *cur++; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1671 | if (ms_ra_acc_cap_len > 52) { |
Neels Hofmeyr | 7554fd1 | 2018-04-23 17:07:18 +0200 | [diff] [blame] | 1672 | LOGP(DMM, LOGL_ERROR, |
| 1673 | "Rejecting GMM RA Update Request: MS Radio Access Capability too long" |
| 1674 | " (ms_ra_acc_cap_len = %u > 52)\n", ms_ra_acc_cap_len); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1675 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1676 | goto rejected; |
| 1677 | } |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1678 | cur += ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1679 | |
| 1680 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 1681 | * DRX parameter, MS network capability */ |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1682 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1683 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1684 | |
| 1685 | switch (upd_type) { |
| 1686 | case GPRS_UPD_T_RA_LA: |
| 1687 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1688 | LOGP(DMM, LOGL_NOTICE, "Update type %i unsupported in Mode III, is your SI13 corrupt?\n", upd_type); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1689 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1690 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1691 | case GPRS_UPD_T_RA: |
| 1692 | case GPRS_UPD_T_PERIODIC: |
| 1693 | break; |
| 1694 | } |
| 1695 | |
Jacob Erlbeck | d35957a | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1696 | if (!mmctx) { |
| 1697 | /* BSSGP doesn't give us an mmctx */ |
| 1698 | |
| 1699 | /* TODO: Check if there is an MM CTX with old_ra_id and |
| 1700 | * the P-TMSI (if given, reguired for UMTS) or as last resort |
| 1701 | * if the TLLI matches foreign_tlli (P-TMSI). Note that this |
| 1702 | * is an optimization to avoid the RA reject (impl detached) |
| 1703 | * below, which will cause a new attach cycle. */ |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1704 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 1705 | if (!MSG_IU_UE_CTX(msg)) { |
| 1706 | /* Gb */ |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1707 | mmctx = sgsn_mm_ctx_by_tlli_and_ptmsi(msgb_tlli(msg), &old_ra_id); |
| 1708 | } else if (TLVP_PRESENT(&tp, GSM48_IE_GMM_ALLOC_PTMSI)) { |
| 1709 | #ifdef BUILD_IU |
| 1710 | /* In Iu mode search only for ptmsi */ |
| 1711 | char mi_string[GSM48_MI_SIZE]; |
| 1712 | uint8_t mi_len = TLVP_LEN(&tp, GSM48_IE_GMM_ALLOC_PTMSI); |
Neels Hofmeyr | 69e356b | 2018-03-15 13:00:35 +0100 | [diff] [blame] | 1713 | const uint8_t *mi = TLVP_VAL(&tp, GSM48_IE_GMM_ALLOC_PTMSI); |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1714 | uint8_t mi_type = *mi & GSM_MI_TYPE_MASK; |
| 1715 | uint32_t tmsi; |
| 1716 | |
| 1717 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 1718 | |
| 1719 | if (mi_type == GSM_MI_TYPE_TMSI) { |
| 1720 | memcpy(&tmsi, mi+1, 4); |
| 1721 | tmsi = ntohl(tmsi); |
| 1722 | mmctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
| 1723 | } |
| 1724 | #else |
Neels Hofmeyr | 7554fd1 | 2018-04-23 17:07:18 +0200 | [diff] [blame] | 1725 | LOGP(DMM, LOGL_ERROR, "Rejecting GMM RA Update Request: No Iu support\n"); |
Daniel Willmann | 61329d4 | 2016-05-21 17:36:18 +0200 | [diff] [blame] | 1726 | goto rejected; |
| 1727 | #endif |
| 1728 | } |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1729 | if (mmctx) { |
| 1730 | LOGMMCTXP(LOGL_INFO, mmctx, |
| 1731 | "Looked up by matching TLLI and P_TMSI. " |
| 1732 | "BSSGP TLLI: %08x, P-TMSI: %08x (%08x), " |
Neels Hofmeyr | 10719b7 | 2018-02-21 00:39:36 +0100 | [diff] [blame] | 1733 | "TLLI: %08x (%08x), RA: %s\n", |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1734 | msgb_tlli(msg), |
| 1735 | mmctx->p_tmsi, mmctx->p_tmsi_old, |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 1736 | mmctx->gb.tlli, mmctx->gb.tlli_new, |
Neels Hofmeyr | 10719b7 | 2018-02-21 00:39:36 +0100 | [diff] [blame] | 1737 | osmo_rai_name(&mmctx->ra)); |
Jacob Erlbeck | d35957a | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1738 | |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 1739 | mmctx->gmm_state = GMM_COMMON_PROC_INIT; |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1740 | } |
| 1741 | } else if (!gprs_ra_id_equals(&mmctx->ra, &old_ra_id) || |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 1742 | mmctx->gmm_state == GMM_DEREGISTERED) |
Jacob Erlbeck | d35957a | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1743 | { |
| 1744 | /* We cannot use the mmctx */ |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1745 | LOGMMCTXP(LOGL_INFO, mmctx, |
Neels Hofmeyr | 10719b7 | 2018-02-21 00:39:36 +0100 | [diff] [blame] | 1746 | "The MM context cannot be used, RA: %03d-%0*d-%d-%d\n", |
| 1747 | mmctx->ra.mcc, mmctx->ra.mnc_3_digits, mmctx->ra.mnc, |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1748 | mmctx->ra.lac, mmctx->ra.rac); |
Pau Espin Pedrol | 1927052 | 2019-08-12 18:47:46 +0200 | [diff] [blame] | 1749 | /* mmctx is set to NULL and gprs_llgmm_unassign(llme) will be |
| 1750 | called below, let's make sure we don't keep dangling llme |
| 1751 | pointers in mmctx (OS#3957). */ |
| 1752 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) |
| 1753 | OSMO_ASSERT(mmctx->gb.llme == NULL); |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1754 | mmctx = NULL; |
| 1755 | } |
Jacob Erlbeck | d35957a | 2016-01-04 18:43:36 +0100 | [diff] [blame] | 1756 | |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 1757 | if (!mmctx) { |
Harald Welte | 2b2429e | 2015-12-25 22:31:36 +0100 | [diff] [blame] | 1758 | if (llme) { |
| 1759 | /* send a XID reset to re-set all LLC sequence numbers |
| 1760 | * in the MS */ |
| 1761 | LOGMMCTXP(LOGL_NOTICE, mmctx, "LLC XID RESET\n"); |
| 1762 | gprs_llgmm_reset(llme); |
| 1763 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1764 | /* The MS has to perform GPRS attach */ |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1765 | /* Device is still IMSI attached for CS but initiate GPRS ATTACH, |
| 1766 | * see GSM 04.08, 4.7.5.1.4 and G.6 */ |
Neels Hofmeyr | 7554fd1 | 2018-04-23 17:07:18 +0200 | [diff] [blame] | 1767 | LOGMMCTXP(LOGL_ERROR, mmctx, "Rejecting GMM RA Update Request: MS should GMM Attach first\n"); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1768 | reject_cause = GMM_CAUSE_IMPL_DETACHED; |
| 1769 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1770 | } |
| 1771 | |
Harald Welte | f0901f0 | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 1772 | /* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */ |
| 1773 | msgid2mmctx(mmctx, msg); |
| 1774 | /* Bump the statistics of received signalling msgs for this MM context */ |
| 1775 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 1776 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1777 | /* Update the MM context with the new RA-ID */ |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1778 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 1779 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1780 | /* Update the MM context with the new (i.e. foreign) TLLI */ |
| 1781 | mmctx->gb.tlli = msgb_tlli(msg); |
| 1782 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1783 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 1784 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 1785 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1786 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 1787 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1788 | #ifdef PTMSI_ALLOC |
Max | 86e04df | 2017-10-09 16:21:31 +0200 | [diff] [blame] | 1789 | ptmsi_update(mmctx); |
| 1790 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1791 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 1792 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 1793 | mmctx_timer_start(mmctx, 3350, sgsn->cfg.timers.T3350); |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1794 | #else |
| 1795 | /* Make sure we are NORMAL (i.e. not SUSPENDED anymore) */ |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 1796 | mmctx->gmm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1797 | |
| 1798 | memset(&sig_data, 0, sizeof(sig_data)); |
| 1799 | sig_data.mm = mmctx; |
| 1800 | osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1801 | #endif |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1802 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 1803 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 1804 | * foreign TLLI to local TLLI */ |
| 1805 | mmctx->gb.tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1806 | |
Pau Espin Pedrol | 982e130 | 2019-08-13 20:01:44 +0200 | [diff] [blame] | 1807 | /* Inform LLC layer about new TLLI but keep accepting the old one during Rx */ |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1808 | gprs_llgmm_assign(mmctx->gb.llme, mmctx->gb.tlli, |
Max | 5aa5196 | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 1809 | mmctx->gb.tlli_new); |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 1810 | } |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1811 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1812 | /* Look at PDP Context Status IE and see if MS's view of |
| 1813 | * activated/deactivated NSAPIs agrees with our view */ |
| 1814 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1815 | const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1816 | process_ms_ctx_status(mmctx, pdp_status); |
| 1817 | } |
| 1818 | |
Daniel Willmann | af24172 | 2016-05-21 00:35:41 +0200 | [diff] [blame] | 1819 | /* Send RA UPDATE ACCEPT. In Iu, the RA upd request can be called from |
| 1820 | * a new Iu connection, so we might need to re-authenticate the |
| 1821 | * connection as well as turn on integrity protection. */ |
| 1822 | mmctx->pending_req = GSM48_MT_GMM_RA_UPD_REQ; |
| 1823 | return gsm48_gmm_authorize(mmctx); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1824 | |
| 1825 | rejected: |
| 1826 | /* Send RA UPDATE REJECT */ |
| 1827 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 1828 | "Rejecting RA Update Request with cause '%s' (%d)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1829 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1830 | rc = gsm48_tx_gmm_ra_upd_rej(msg, reject_cause); |
| 1831 | if (mmctx) |
| 1832 | mm_ctx_cleanup_free(mmctx, "GPRS RA UPDATE REJ"); |
Pau Espin Pedrol | d723a97 | 2019-08-12 17:43:35 +0200 | [diff] [blame] | 1833 | else if (llme) |
| 1834 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1835 | |
| 1836 | return rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1837 | } |
| 1838 | |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1839 | /* 3GPP TS 24.008 Section 9.4.20 Service request. |
| 1840 | * In Iu, a UE in PMM-IDLE mode can use GSM48_MT_GMM_SERVICE_REQ to switch back |
| 1841 | * to PMM-CONNECTED mode. */ |
| 1842 | static int gsm48_rx_gmm_service_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
| 1843 | { |
| 1844 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 1845 | uint8_t *cur = gh->data, *mi; |
Pau Espin Pedrol | db6f803 | 2018-01-07 18:13:09 +0100 | [diff] [blame] | 1846 | uint8_t service_type, mi_len, mi_type; |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1847 | uint32_t tmsi; |
| 1848 | struct tlv_parsed tp; |
| 1849 | char mi_string[GSM48_MI_SIZE]; |
| 1850 | enum gsm48_gmm_cause reject_cause; |
| 1851 | int rc; |
| 1852 | |
| 1853 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM SERVICE REQUEST "); |
| 1854 | |
| 1855 | /* This message is only valid in Iu mode */ |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 1856 | if (!MSG_IU_UE_CTX(msg)) { |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1857 | LOGPC(DMM, LOGL_INFO, "Invalid if not in Iu mode\n"); |
| 1858 | return -1; |
| 1859 | } |
| 1860 | |
| 1861 | /* Skip Ciphering key sequence number 10.5.1.2 */ |
Pau Espin Pedrol | db6f803 | 2018-01-07 18:13:09 +0100 | [diff] [blame] | 1862 | /* uint8_t ciph_seq_nr = *cur & 0x07; */ |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1863 | |
| 1864 | /* Service type 10.5.5.20 */ |
| 1865 | service_type = (*cur++ >> 4) & 0x07; |
| 1866 | |
| 1867 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 1868 | mi_len = *cur++; |
| 1869 | mi = cur; |
| 1870 | if (mi_len > 8) |
| 1871 | goto err_inval; |
| 1872 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 1873 | cur += mi_len; |
| 1874 | |
| 1875 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 1876 | |
| 1877 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 1878 | get_value_string(gprs_service_t_strs, service_type)); |
| 1879 | |
| 1880 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 1881 | |
| 1882 | /* Optional: PDP context status, MBMS context status, Uplink data status, Device properties */ |
| 1883 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, (msg->data + msg->len) - cur, 0, 0); |
| 1884 | |
| 1885 | switch (mi_type) { |
| 1886 | case GSM_MI_TYPE_IMSI: |
| 1887 | /* Try to find MM context based on IMSI */ |
| 1888 | if (!ctx) |
| 1889 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
| 1890 | if (!ctx) { |
| 1891 | /* FIXME: We need to have a context for service request? */ |
Alexander Couzens | 47cf6bd | 2018-07-17 20:13:27 +0200 | [diff] [blame] | 1892 | reject_cause = GMM_CAUSE_IMPL_DETACHED; |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1893 | goto rejected; |
| 1894 | } |
| 1895 | msgid2mmctx(ctx, msg); |
| 1896 | break; |
| 1897 | case GSM_MI_TYPE_TMSI: |
| 1898 | memcpy(&tmsi, mi+1, 4); |
| 1899 | tmsi = ntohl(tmsi); |
| 1900 | /* Try to find MM context based on P-TMSI */ |
| 1901 | if (!ctx) |
| 1902 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
| 1903 | if (!ctx) { |
| 1904 | /* FIXME: We need to have a context for service request? */ |
Alexander Couzens | 47cf6bd | 2018-07-17 20:13:27 +0200 | [diff] [blame] | 1905 | reject_cause = GMM_CAUSE_IMPL_DETACHED; |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1906 | goto rejected; |
| 1907 | } |
| 1908 | msgid2mmctx(ctx, msg); |
| 1909 | break; |
| 1910 | default: |
| 1911 | LOGMMCTXP(LOGL_NOTICE, ctx, "Rejecting SERVICE REQUEST with " |
| 1912 | "MI type %s\n", gsm48_mi_type_name(mi_type)); |
| 1913 | reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; |
| 1914 | goto rejected; |
| 1915 | } |
| 1916 | |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 1917 | ctx->gmm_state = GMM_COMMON_PROC_INIT; |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1918 | |
| 1919 | ctx->iu.service.type = service_type; |
| 1920 | |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1921 | /* Look at PDP Context Status IE and see if MS's view of |
| 1922 | * activated/deactivated NSAPIs agrees with our view */ |
| 1923 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
| 1924 | const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); |
efistokl | def0d94 | 2019-04-23 14:37:13 +0300 | [diff] [blame] | 1925 | const size_t pdp_status_len = TLVP_LEN(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); |
| 1926 | |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1927 | process_ms_ctx_status(ctx, pdp_status); |
efistokl | def0d94 | 2019-04-23 14:37:13 +0300 | [diff] [blame] | 1928 | |
| 1929 | /* 3GPP TS 24.008 Section 4.7.13.4 Service request procedure not |
| 1930 | * accepted by the network. Cause #40. If MS has PDP Contexts in |
| 1931 | * Active state in pdp_status but there is no PDP contexts on |
| 1932 | * SGSN side then Reject with the cause will force the mobile to |
| 1933 | * reset PDP contexts */ |
| 1934 | if (llist_empty(&ctx->pdp_list) && pdp_status_has_active_nsapis(pdp_status, pdp_status_len)) { |
| 1935 | reject_cause = GMM_CAUSE_NO_PDP_ACTIVATED; |
| 1936 | goto rejected; |
| 1937 | } |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 1938 | } |
| 1939 | |
| 1940 | |
| 1941 | ctx->pending_req = GSM48_MT_GMM_SERVICE_REQ; |
| 1942 | return gsm48_gmm_authorize(ctx); |
| 1943 | |
| 1944 | err_inval: |
| 1945 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 1946 | reject_cause = GMM_CAUSE_SEM_INCORR_MSG; |
| 1947 | |
| 1948 | rejected: |
| 1949 | /* Send SERVICE REJECT */ |
| 1950 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1951 | "Rejecting Service Request with cause '%s' (%d)\n", |
| 1952 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
| 1953 | rc = gsm48_tx_gmm_service_rej_oldmsg(msg, reject_cause); |
| 1954 | |
| 1955 | return rc; |
| 1956 | |
| 1957 | } |
| 1958 | |
| 1959 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1960 | static int gsm48_rx_gmm_status(struct sgsn_mm_ctx *mmctx, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1961 | { |
| 1962 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1963 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1964 | LOGMMCTXP(LOGL_INFO, mmctx, "-> GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1965 | get_value_string(gsm48_gmm_cause_names, gh->data[0])); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1966 | |
| 1967 | return 0; |
| 1968 | } |
| 1969 | |
Pau Espin Pedrol | 72b61e4 | 2019-08-12 16:43:58 +0200 | [diff] [blame] | 1970 | /* Rx GPRS Mobility Management. MMCTX can be NULL when called. On !Gb (Iu), llme is NULL */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1971 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1972 | struct gprs_llc_llme *llme, bool drop_cipherable) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1973 | { |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 1974 | struct sgsn_signal_data sig_data; |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1975 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1976 | int rc; |
| 1977 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 1978 | if (drop_cipherable && gsm48_hdr_gmm_cipherable(gh)) { |
| 1979 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping cleartext GMM %s which " |
| 1980 | "is expected to be encrypted for TLLI 0x%08x\n", |
| 1981 | get_value_string(gprs_msgt_gmm_names, gh->msg_type), |
| 1982 | llme->tlli); |
| 1983 | return -EBADMSG; |
| 1984 | } |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1985 | |
Harald Welte | 2b2429e | 2015-12-25 22:31:36 +0100 | [diff] [blame] | 1986 | if (llme && !mmctx && |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1987 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1988 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1989 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1990 | /* 4.7.10 */ |
Jacob Erlbeck | 14ae582 | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1991 | if (gh->msg_type == GSM48_MT_GMM_STATUS) { |
| 1992 | /* TLLI unassignment */ |
Max | 3955025 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1993 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1994 | return 0; |
Jacob Erlbeck | 14ae582 | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1995 | } |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1996 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1997 | /* Don't reply or establish a LLME on DETACH_ACK */ |
Max | 3955025 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 1998 | if (gh->msg_type == GSM48_MT_GMM_DETACH_ACK) |
| 1999 | return gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2000 | |
Alexander Couzens | 85ca87b | 2018-05-02 18:17:34 +0200 | [diff] [blame] | 2001 | /* Don't reply to deatch requests, reason power off */ |
| 2002 | if (gh->msg_type == GSM48_MT_GMM_DETACH_REQ && |
| 2003 | gh->data[0] & 0x8) { |
| 2004 | return 0; |
| 2005 | } |
| 2006 | |
| 2007 | |
Jacob Erlbeck | c4f9bf3 | 2014-11-11 08:55:13 +0100 | [diff] [blame] | 2008 | gprs_llgmm_reset(llme); |
| 2009 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2010 | /* Don't force it into re-attachment */ |
| 2011 | if (gh->msg_type == GSM48_MT_GMM_DETACH_REQ) { |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 2012 | /* Handle Detach Request */ |
| 2013 | rc = gsm48_rx_gmm_det_req(NULL, msg); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2014 | |
| 2015 | /* TLLI unassignment */ |
Max | 3955025 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 2016 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2017 | return rc; |
| 2018 | } |
| 2019 | |
| 2020 | /* Force the MS to re-attach */ |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2021 | rc = gsm0408_gprs_force_reattach_oldmsg(msg, llme); |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2022 | |
| 2023 | /* TLLI unassignment */ |
Max | 3955025 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 2024 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2025 | return rc; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2026 | } |
| 2027 | |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2028 | /* |
| 2029 | * For a few messages, mmctx may be NULL. For most, we want to ensure a |
| 2030 | * non-NULL mmctx. At the same time, we want to keep the message |
| 2031 | * validity check intact, so that all message types appear in the |
| 2032 | * switch statement and the default case thus means "unknown message". |
| 2033 | * If we split the switch in two parts to check non-NULL halfway, the |
| 2034 | * unknown-message check breaks, or we'd need to duplicate the switch |
| 2035 | * cases in both parts. Just keep one large switch and add some gotos. |
| 2036 | */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2037 | switch (gh->msg_type) { |
| 2038 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2039 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2040 | break; |
| 2041 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2042 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2043 | break; |
Daniel Willmann | 1dee2b6 | 2016-05-21 00:15:29 +0200 | [diff] [blame] | 2044 | case GSM48_MT_GMM_SERVICE_REQ: |
| 2045 | rc = gsm48_rx_gmm_service_req(mmctx, msg); |
| 2046 | break; |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2047 | /* For all the following types mmctx can not be NULL */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2048 | case GSM48_MT_GMM_ID_RESP: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2049 | if (!mmctx) |
| 2050 | goto null_mmctx; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2051 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2052 | break; |
| 2053 | case GSM48_MT_GMM_STATUS: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2054 | if (!mmctx) |
| 2055 | goto null_mmctx; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2056 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2057 | break; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 2058 | case GSM48_MT_GMM_DETACH_REQ: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2059 | if (!mmctx) |
| 2060 | goto null_mmctx; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2061 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 2062 | break; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2063 | case GSM48_MT_GMM_DETACH_ACK: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2064 | if (!mmctx) |
| 2065 | goto null_mmctx; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2066 | LOGMMCTXP(LOGL_INFO, mmctx, "-> DETACH ACK\n"); |
| 2067 | mm_ctx_cleanup_free(mmctx, "GPRS DETACH ACK"); |
| 2068 | rc = 0; |
| 2069 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2070 | case GSM48_MT_GMM_ATTACH_COMPL: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2071 | if (!mmctx) |
| 2072 | goto null_mmctx; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2073 | /* only in case SGSN offered new P-TMSI */ |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2074 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ATTACH COMPLETE\n"); |
efistokl | c42e21e | 2019-04-07 17:14:31 +0300 | [diff] [blame] | 2075 | |
| 2076 | #ifdef BUILD_IU |
| 2077 | if (mmctx->iu.ue_ctx) { |
| 2078 | ranap_iu_tx_release(mmctx->iu.ue_ctx, NULL); |
| 2079 | } |
| 2080 | #endif |
| 2081 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2082 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 2083 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2084 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 2085 | mmctx->pending_req = 0; |
Pau Espin Pedrol | 2179dec | 2019-08-13 19:09:32 +0200 | [diff] [blame^] | 2086 | mmctx->gmm_state = GMM_REGISTERED_NORMAL; |
| 2087 | switch(mmctx->ran_type) { |
| 2088 | case MM_CTX_T_UTRAN_Iu: |
| 2089 | mmctx_set_pmm_state(mmctx, PMM_CONNECTED); |
| 2090 | break; |
| 2091 | case MM_CTX_T_GERAN_Gb: |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2092 | /* Unassign the old TLLI */ |
| 2093 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
Max | 5aa5196 | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 2094 | gprs_llme_copy_key(mmctx, mmctx->gb.llme); |
Pau Espin Pedrol | 404d9b8 | 2019-08-12 17:49:09 +0200 | [diff] [blame] | 2095 | gprs_llgmm_assign(mmctx->gb.llme, TLLI_UNASSIGNED, |
Max | 5aa5196 | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 2096 | mmctx->gb.tlli_new); |
Pau Espin Pedrol | 2179dec | 2019-08-13 19:09:32 +0200 | [diff] [blame^] | 2097 | mmctx_set_mm_state(mmctx, MM_READY); |
| 2098 | break; |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2099 | } |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 2100 | rc = 0; |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 2101 | |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 2102 | osmo_fsm_inst_dispatch(mmctx->gmm_att_req.fsm, E_ATTACH_COMPLETE_RECV, 0); |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 2103 | memset(&sig_data, 0, sizeof(sig_data)); |
| 2104 | sig_data.mm = mmctx; |
| 2105 | osmo_signal_dispatch(SS_SGSN, S_SGSN_ATTACH, &sig_data); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2106 | break; |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 2107 | case GSM48_MT_GMM_RA_UPD_COMPL: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2108 | if (!mmctx) |
| 2109 | goto null_mmctx; |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 2110 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | ecff242 | 2015-08-16 18:14:33 +0200 | [diff] [blame] | 2111 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ROUTING AREA UPDATE COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2112 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 2113 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2114 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 2115 | mmctx->pending_req = 0; |
Pau Espin Pedrol | 2179dec | 2019-08-13 19:09:32 +0200 | [diff] [blame^] | 2116 | mmctx->gmm_state = GMM_REGISTERED_NORMAL; |
| 2117 | switch(mmctx->ran_type) { |
| 2118 | case MM_CTX_T_UTRAN_Iu: |
| 2119 | mmctx_set_pmm_state(mmctx, PMM_CONNECTED); |
| 2120 | break; |
| 2121 | case MM_CTX_T_GERAN_Gb: |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2122 | /* Unassign the old TLLI */ |
| 2123 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
Pau Espin Pedrol | 404d9b8 | 2019-08-12 17:49:09 +0200 | [diff] [blame] | 2124 | gprs_llgmm_assign(mmctx->gb.llme, TLLI_UNASSIGNED, |
Max | 5aa5196 | 2016-07-06 11:33:04 +0200 | [diff] [blame] | 2125 | mmctx->gb.tlli_new); |
Pau Espin Pedrol | 2179dec | 2019-08-13 19:09:32 +0200 | [diff] [blame^] | 2126 | mmctx_set_mm_state(mmctx, MM_READY); |
| 2127 | break; |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2128 | } |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 2129 | rc = 0; |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 2130 | |
| 2131 | memset(&sig_data, 0, sizeof(sig_data)); |
| 2132 | sig_data.mm = mmctx; |
| 2133 | osmo_signal_dispatch(SS_SGSN, S_SGSN_UPDATE, &sig_data); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2134 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2135 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2136 | if (!mmctx) |
| 2137 | goto null_mmctx; |
Pau Espin Pedrol | 2844b5e | 2019-08-13 21:12:49 +0200 | [diff] [blame] | 2138 | LOGMMCTXP(LOGL_INFO, mmctx, "-> PTMSI REALLOCATION COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2139 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 2140 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2141 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 2142 | mmctx->pending_req = 0; |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2143 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) { |
| 2144 | /* Unassign the old TLLI */ |
| 2145 | mmctx->gb.tlli = mmctx->gb.tlli_new; |
Pau Espin Pedrol | 404d9b8 | 2019-08-12 17:49:09 +0200 | [diff] [blame] | 2146 | //gprs_llgmm_assign(mmctx->gb.llme, TLLI_UNASSIGNED, mmctx->gb.tlli_new, GPRS_ALGO_GEA0, NULL); |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2147 | } |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 2148 | rc = 0; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2149 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2150 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2151 | if (!mmctx) |
| 2152 | goto null_mmctx; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 2153 | rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2154 | break; |
Neels Hofmeyr | 058cd57 | 2017-02-24 06:24:45 +0100 | [diff] [blame] | 2155 | case GSM48_MT_GMM_AUTH_CIPH_FAIL: |
| 2156 | rc = gsm48_rx_gmm_auth_ciph_fail(mmctx, msg); |
| 2157 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2158 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2159 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GMM msg type 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2160 | gh->msg_type); |
Neels Hofmeyr | 9329e6f | 2016-06-03 00:44:23 +0200 | [diff] [blame] | 2161 | if (mmctx) |
| 2162 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
| 2163 | else |
| 2164 | rc = -EINVAL; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2165 | break; |
| 2166 | } |
| 2167 | |
| 2168 | return rc; |
Neels Hofmeyr | e98ba82 | 2016-05-22 14:28:19 +0200 | [diff] [blame] | 2169 | |
| 2170 | null_mmctx: |
| 2171 | LOGP(DMM, LOGL_ERROR, |
| 2172 | "Received GSM 04.08 message type 0x%02x," |
| 2173 | " but no MM context available\n", |
| 2174 | gh->msg_type); |
| 2175 | return -EINVAL; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2176 | } |
| 2177 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2178 | static void mmctx_timer_cb(void *_mm) |
| 2179 | { |
| 2180 | struct sgsn_mm_ctx *mm = _mm; |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 2181 | struct gsm_auth_tuple *at; |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 2182 | int rc; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2183 | |
| 2184 | mm->num_T_exp++; |
| 2185 | |
| 2186 | switch (mm->T) { |
| 2187 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 2188 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2189 | LOGMMCTXP(LOGL_NOTICE, mm, "T3350 expired >= 5 times\n"); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 2190 | mm_ctx_cleanup_free(mm, "T3350"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2191 | /* FIXME: should we return some error? */ |
| 2192 | break; |
| 2193 | } |
| 2194 | /* re-transmit the respective msg and re-start timer */ |
| 2195 | switch (mm->t3350_mode) { |
| 2196 | case GMM_T3350_MODE_ATT: |
| 2197 | gsm48_tx_gmm_att_ack(mm); |
| 2198 | break; |
| 2199 | case GMM_T3350_MODE_RAU: |
| 2200 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 2201 | break; |
| 2202 | case GMM_T3350_MODE_PTMSI_REALL: |
| 2203 | /* FIXME */ |
| 2204 | break; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 2205 | case GMM_T3350_MODE_NONE: |
| 2206 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 2207 | "T3350 mode wasn't set, ignoring timeout\n"); |
| 2208 | break; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2209 | } |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 2210 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3350, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2211 | break; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 2212 | case 3360: /* waiting for AUTH AND CIPH RESP */ |
| 2213 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2214 | LOGMMCTXP(LOGL_NOTICE, mm, "T3360 expired >= 5 times\n"); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 2215 | mm_ctx_cleanup_free(mm, "T3360"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 2216 | break; |
| 2217 | } |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 2218 | /* Re-transmit the respective msg and re-start timer */ |
| 2219 | if (mm->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 2220 | LOGMMCTXP(LOGL_ERROR, mm, |
| 2221 | "timeout: invalid auth triplet reference\n"); |
| 2222 | mm_ctx_cleanup_free(mm, "T3360"); |
| 2223 | break; |
| 2224 | } |
| 2225 | at = &mm->auth_triplet; |
| 2226 | |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 2227 | rc = gsm48_tx_gmm_auth_ciph_req(mm, &at->vec, at->key_seq, false); |
| 2228 | if (rc < 0) |
Ruben Undheim | 55fcf11 | 2018-09-25 22:59:34 +0200 | [diff] [blame] | 2229 | LOGMMCTXP(LOGL_ERROR, mm, "failed sending Auth. & Ciph. Request: %s \n", strerror(-rc)); |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 2230 | else |
| 2231 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3360, 0); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 2232 | break; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2233 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 2234 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2235 | LOGMMCTXP(LOGL_NOTICE, mm, "T3370 expired >= 5 times\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2236 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 2237 | mm_ctx_cleanup_free(mm, "GPRS ATTACH REJECT (T3370)"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2238 | break; |
| 2239 | } |
| 2240 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 2241 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 2242 | osmo_timer_schedule(&mm->timer, sgsn->cfg.timers.T3370, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2243 | break; |
| 2244 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2245 | LOGMMCTXP(LOGL_ERROR, mm, "timer expired in unknown mode %u\n", |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 2246 | mm->T); |
| 2247 | } |
| 2248 | } |
| 2249 | |
| 2250 | /* GPRS SESSION MANAGEMENT */ |
| 2251 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2252 | static void pdpctx_timer_cb(void *_mm); |
| 2253 | |
Pau Espin Pedrol | 9b5d7f6 | 2018-07-16 14:31:15 +0200 | [diff] [blame] | 2254 | |
| 2255 | static void pdpctx_timer_rearm(struct sgsn_pdp_ctx *pdp, unsigned int T, unsigned int seconds) |
| 2256 | { |
| 2257 | if (osmo_timer_pending(&pdp->timer)) |
| 2258 | LOGPDPCTXP(LOGL_ERROR, pdp, "Scheduling PDP timer %u while old " |
| 2259 | "timer %u pending\n", T, pdp->T); |
| 2260 | osmo_timer_schedule(&pdp->timer, seconds, 0); |
| 2261 | } |
| 2262 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2263 | static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, |
| 2264 | unsigned int seconds) |
| 2265 | { |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 2266 | if (osmo_timer_pending(&pdp->timer)) |
Pravin Kumarvel | 26f6ced | 2016-11-17 12:19:01 +0530 | [diff] [blame] | 2267 | LOGPDPCTXP(LOGL_ERROR, pdp, "Starting PDP timer %u while old " |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2268 | "timer %u pending\n", T, pdp->T); |
| 2269 | pdp->T = T; |
| 2270 | pdp->num_T_exp = 0; |
| 2271 | |
Pablo Neira Ayuso | 5121576 | 2017-05-08 20:57:52 +0200 | [diff] [blame] | 2272 | osmo_timer_setup(&pdp->timer, pdpctx_timer_cb, pdp); |
Pau Espin Pedrol | 9b5d7f6 | 2018-07-16 14:31:15 +0200 | [diff] [blame] | 2273 | pdpctx_timer_rearm(pdp, pdp->T, seconds); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2274 | } |
| 2275 | |
Pravin Kumarvel | 16606c9 | 2016-11-17 12:20:01 +0530 | [diff] [blame] | 2276 | static void pdpctx_timer_stop(struct sgsn_pdp_ctx *pdp, unsigned int T) |
| 2277 | { |
| 2278 | if (pdp->T != T) |
| 2279 | LOGPDPCTXP(LOGL_ERROR, pdp, "Stopping PDP timer %u but " |
| 2280 | "%u is running\n", T, pdp->T); |
| 2281 | osmo_timer_del(&pdp->timer); |
| 2282 | } |
| 2283 | |
Pau Espin Pedrol | 8c7d259 | 2018-07-09 20:44:17 +0200 | [diff] [blame] | 2284 | void pdp_ctx_detach_mm_ctx(struct sgsn_pdp_ctx *pdp) |
| 2285 | { |
| 2286 | /* Detach from MM context */ |
| 2287 | llist_del(&pdp->list); |
| 2288 | pdp->mm = NULL; |
| 2289 | |
| 2290 | /* stop timer 3395 */ |
| 2291 | pdpctx_timer_stop(pdp, 3395); |
| 2292 | } |
| 2293 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 2294 | #if 0 |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2295 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 2296 | { |
| 2297 | uint8_t v[6]; |
| 2298 | |
| 2299 | v[0] = PDP_TYPE_ORG_IETF; |
| 2300 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 2301 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 2302 | |
| 2303 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 2304 | } |
| 2305 | |
| 2306 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 2307 | { |
| 2308 | uint8_t v[2]; |
| 2309 | |
| 2310 | v[0] = PDP_TYPE_ORG_ETSI; |
| 2311 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 2312 | |
| 2313 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 2314 | } |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 2315 | #endif |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2316 | |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2317 | /* Section 9.5.2: Activate PDP Context Accept */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2318 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2319 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2320 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP ACC"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2321 | struct gsm48_hdr *gh; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2322 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2323 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2324 | LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2325 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_ACCEPT]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2326 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2327 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2328 | |
| 2329 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2330 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2331 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2332 | |
| 2333 | /* Negotiated LLC SAPI */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2334 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2335 | |
Harald Welte | 55e0df7 | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 2336 | /* FIXME: copy QoS parameters from original request */ |
| 2337 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 2338 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2339 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2340 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2341 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2342 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2343 | /* PDP address */ |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2344 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 2345 | * the IE is identical with the 04.08 PDP Address IE */ |
| 2346 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2347 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 2348 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2349 | pdp->lib->eua.v[0] |= 0xf0; |
| 2350 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2351 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
Holger Hans Peter Freyther | d219507 | 2014-04-04 11:55:21 +0200 | [diff] [blame] | 2352 | if (pdp->lib->pco_req.l) |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2353 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | 3c0b9b9 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 2354 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 2355 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 2356 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2357 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2358 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm, true); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2359 | } |
| 2360 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2361 | /* Section 9.5.3: Activate PDP Context reject */ |
| 2362 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 2363 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 2364 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2365 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP REJ"); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2366 | struct gsm48_hdr *gh; |
| 2367 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 2368 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2369 | LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2370 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REJECT]); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2371 | |
| 2372 | mmctx2msgid(msg, mm); |
| 2373 | |
| 2374 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2375 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2376 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 2377 | |
| 2378 | msgb_v_put(msg, cause); |
| 2379 | if (pco_len && pco_v) |
| 2380 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 2381 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2382 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2383 | } |
| 2384 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2385 | /* Section 9.5.8: Deactivate PDP Context Request */ |
| 2386 | static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, |
Pau Espin Pedrol | 89895b0 | 2018-07-13 15:14:15 +0200 | [diff] [blame] | 2387 | uint8_t sm_cause, bool teardown) |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2388 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2389 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET REQ"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2390 | struct gsm48_hdr *gh; |
| 2391 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Pau Espin Pedrol | 89895b0 | 2018-07-13 15:14:15 +0200 | [diff] [blame] | 2392 | uint8_t tear_down_ind = (0x9 << 4) | (!!teardown); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2393 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2394 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n"); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2395 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_REQUEST]); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2396 | |
| 2397 | mmctx2msgid(msg, mm); |
| 2398 | |
| 2399 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2400 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2401 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; |
| 2402 | |
| 2403 | msgb_v_put(msg, sm_cause); |
Pau Espin Pedrol | 89895b0 | 2018-07-13 15:14:15 +0200 | [diff] [blame] | 2404 | msgb_v_put(msg, tear_down_ind); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2405 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2406 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2407 | } |
Pau Espin Pedrol | 89895b0 | 2018-07-13 15:14:15 +0200 | [diff] [blame] | 2408 | int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause, bool teardown) |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2409 | { |
Harald Welte | 9450882 | 2015-08-15 19:08:21 +0200 | [diff] [blame] | 2410 | pdpctx_timer_start(pdp, 3395, sgsn->cfg.timers.T3395); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2411 | |
Pau Espin Pedrol | 89895b0 | 2018-07-13 15:14:15 +0200 | [diff] [blame] | 2412 | return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause, teardown); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2413 | } |
| 2414 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2415 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2416 | static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2417 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 2418 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 PDP DET ACC"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2419 | struct gsm48_hdr *gh; |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2420 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2421 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2422 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2423 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_DL_DEACTIVATE_ACCEPT]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2424 | |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2425 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2426 | |
| 2427 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 2428 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 2429 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 2430 | |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2431 | return gsm48_gmm_sendmsg(msg, 0, mm, true); |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2432 | } |
| 2433 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 2434 | { |
| 2435 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2436 | } |
| 2437 | |
Holger Hans Peter Freyther | 7605bdc | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2438 | static int activate_ggsn(struct sgsn_mm_ctx *mmctx, |
| 2439 | struct sgsn_ggsn_ctx *ggsn, const uint8_t transaction_id, |
| 2440 | const uint8_t req_nsapi, const uint8_t req_llc_sapi, |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2441 | struct tlv_parsed *tp, int destroy_ggsn) |
Holger Hans Peter Freyther | 7605bdc | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2442 | { |
| 2443 | struct sgsn_pdp_ctx *pdp; |
| 2444 | |
Holger Hans Peter Freyther | b7ae0b3 | 2015-05-29 15:11:55 +0200 | [diff] [blame] | 2445 | LOGMMCTXP(LOGL_DEBUG, mmctx, "Using GGSN %u\n", ggsn->id); |
Holger Hans Peter Freyther | 7605bdc | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2446 | ggsn->gsn = sgsn->gsn; |
| 2447 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, req_nsapi, tp); |
| 2448 | if (!pdp) |
| 2449 | return -1; |
| 2450 | |
| 2451 | /* Store SAPI and Transaction Identifier */ |
| 2452 | pdp->sapi = req_llc_sapi; |
| 2453 | pdp->ti = transaction_id; |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2454 | pdp->destroy_ggsn = destroy_ggsn; |
Holger Hans Peter Freyther | 7605bdc | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2455 | |
| 2456 | return 0; |
| 2457 | } |
| 2458 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2459 | static void ggsn_lookup_cb(void *arg, int status, int timeouts, struct hostent *hostent) |
| 2460 | { |
| 2461 | struct sgsn_ggsn_ctx *ggsn; |
| 2462 | struct sgsn_ggsn_lookup *lookup = arg; |
| 2463 | struct in_addr *addr = NULL; |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2464 | |
| 2465 | /* The context is gone while we made a request */ |
| 2466 | if (!lookup->mmctx) { |
Holger Hans Peter Freyther | 725f3f1 | 2017-01-26 11:05:33 +0100 | [diff] [blame] | 2467 | talloc_free(lookup->orig_msg); |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2468 | talloc_free(lookup); |
| 2469 | return; |
| 2470 | } |
| 2471 | |
| 2472 | if (status != ARES_SUCCESS) { |
| 2473 | struct sgsn_mm_ctx *mmctx = lookup->mmctx; |
| 2474 | |
| 2475 | LOGMMCTXP(LOGL_ERROR, mmctx, "DNS query failed.\n"); |
| 2476 | |
| 2477 | /* Need to try with three digits now */ |
| 2478 | if (lookup->state == SGSN_GGSN_2DIGIT) { |
| 2479 | char *hostname; |
| 2480 | int rc; |
| 2481 | |
| 2482 | lookup->state = SGSN_GGSN_3DIGIT; |
| 2483 | hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, |
| 2484 | lookup->apn_str, 1); |
| 2485 | LOGMMCTXP(LOGL_DEBUG, mmctx, |
| 2486 | "Going to query %s\n", hostname); |
| 2487 | rc = sgsn_ares_query(sgsn, hostname, |
| 2488 | ggsn_lookup_cb, lookup); |
| 2489 | if (rc != 0) { |
Harald Welte | 601cf12 | 2015-08-16 17:16:28 +0200 | [diff] [blame] | 2490 | LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't start GGSN\n"); |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2491 | goto reject_due_failure; |
| 2492 | } |
| 2493 | return; |
| 2494 | } |
| 2495 | |
| 2496 | LOGMMCTXP(LOGL_ERROR, mmctx, "Couldn't resolve GGSN\n"); |
| 2497 | goto reject_due_failure; |
| 2498 | } |
| 2499 | |
| 2500 | if (hostent->h_length != sizeof(struct in_addr)) { |
| 2501 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, |
Harald Welte | 6b39fee | 2015-08-16 17:16:57 +0200 | [diff] [blame] | 2502 | "Wrong addr size(%zu)\n", sizeof(struct in_addr)); |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2503 | goto reject_due_failure; |
| 2504 | } |
| 2505 | |
Holger Hans Peter Freyther | 0958938 | 2015-06-02 09:38:41 +0200 | [diff] [blame] | 2506 | /* Get the first addr from the list */ |
| 2507 | addr = (struct in_addr *) hostent->h_addr_list[0]; |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2508 | if (!addr) { |
| 2509 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "No host address.\n"); |
| 2510 | goto reject_due_failure; |
| 2511 | } |
| 2512 | |
| 2513 | ggsn = sgsn_ggsn_ctx_alloc(UINT32_MAX); |
| 2514 | if (!ggsn) { |
| 2515 | LOGMMCTXP(LOGL_ERROR, lookup->mmctx, "Failed to create ggsn.\n"); |
| 2516 | goto reject_due_failure; |
| 2517 | } |
| 2518 | ggsn->remote_addr = *addr; |
| 2519 | LOGMMCTXP(LOGL_NOTICE, lookup->mmctx, |
| 2520 | "Selected %s as GGSN.\n", inet_ntoa(*addr)); |
| 2521 | |
| 2522 | /* forget about the ggsn look-up */ |
| 2523 | lookup->mmctx->ggsn_lookup = NULL; |
| 2524 | |
| 2525 | activate_ggsn(lookup->mmctx, ggsn, lookup->ti, lookup->nsapi, |
| 2526 | lookup->sapi, &lookup->tp, 1); |
| 2527 | |
| 2528 | /* Now free it */ |
Holger Hans Peter Freyther | 725f3f1 | 2017-01-26 11:05:33 +0100 | [diff] [blame] | 2529 | talloc_free(lookup->orig_msg); |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2530 | talloc_free(lookup); |
| 2531 | return; |
| 2532 | |
| 2533 | reject_due_failure: |
| 2534 | gsm48_tx_gsm_act_pdp_rej(lookup->mmctx, lookup->ti, |
| 2535 | GMM_CAUSE_NET_FAIL, 0, NULL); |
| 2536 | lookup->mmctx->ggsn_lookup = NULL; |
Holger Hans Peter Freyther | 725f3f1 | 2017-01-26 11:05:33 +0100 | [diff] [blame] | 2537 | talloc_free(lookup->orig_msg); |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2538 | talloc_free(lookup); |
| 2539 | } |
Holger Hans Peter Freyther | ccd2312 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2540 | |
Holger Hans Peter Freyther | 725f3f1 | 2017-01-26 11:05:33 +0100 | [diff] [blame] | 2541 | static int do_act_pdp_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, bool *delete) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2542 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2543 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2544 | struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data; |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 2545 | uint8_t req_qos_len, req_pdpa_len; |
| 2546 | uint8_t *req_qos, *req_pdpa; |
| 2547 | struct tlv_parsed tp; |
Neels Hofmeyr | 961bd0b | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2548 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 2549 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2550 | struct sgsn_pdp_ctx *pdp; |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 2551 | enum gsm48_gsm_cause gsm_cause; |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2552 | char apn_str[GSM_APN_LENGTH] = { 0, }; |
| 2553 | char *hostname; |
| 2554 | int rc; |
Philipp Maier | d015cbd | 2017-02-27 17:58:31 +0100 | [diff] [blame] | 2555 | struct gprs_llc_lle *lle; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2556 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2557 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2558 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2559 | |
Harald Welte | 23c1376 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 2560 | /* FIXME: length checks! */ |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 2561 | req_qos_len = act_req->data[0]; |
| 2562 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 2563 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 2564 | req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2565 | |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 2566 | switch (req_pdpa[0] & 0xf) { |
| 2567 | case 0x0: |
| 2568 | DEBUGPC(DMM, "ETSI "); |
| 2569 | break; |
| 2570 | case 0x1: |
| 2571 | DEBUGPC(DMM, "IETF "); |
| 2572 | break; |
| 2573 | case 0xf: |
| 2574 | DEBUGPC(DMM, "Empty "); |
| 2575 | break; |
| 2576 | } |
| 2577 | |
| 2578 | switch (req_pdpa[1]) { |
| 2579 | case 0x21: |
| 2580 | DEBUGPC(DMM, "IPv4 "); |
| 2581 | if (req_pdpa_len >= 6) { |
| 2582 | struct in_addr ia; |
| 2583 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 2584 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 2585 | } |
| 2586 | break; |
| 2587 | case 0x57: |
| 2588 | DEBUGPC(DMM, "IPv6 "); |
| 2589 | if (req_pdpa_len >= 18) { |
| 2590 | /* FIXME: print IPv6 address */ |
| 2591 | } |
| 2592 | break; |
Pau Espin Pedrol | d04e669 | 2018-01-07 18:14:12 +0100 | [diff] [blame] | 2593 | default: |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 2594 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 2595 | break; |
| 2596 | } |
| 2597 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2598 | LOGPC(DMM, LOGL_INFO, "\n"); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2599 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2600 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 2601 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 2602 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 2603 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2604 | GSM_CAUSE_INV_MAND_INFO, |
| 2605 | 0, NULL); |
| 2606 | } |
| 2607 | |
Holger Hans Peter Freyther | 7605bdc | 2015-05-24 12:42:26 +0800 | [diff] [blame] | 2608 | /* Optional: Access Point Name, Protocol Config Options */ |
| 2609 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 2610 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 2611 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 2612 | else |
| 2613 | memset(&tp, 0, sizeof(tp)); |
| 2614 | |
| 2615 | |
| 2616 | /* put the non-TLV elements in the TLV parser structure to |
| 2617 | * pass them on to the SGSN / GTP code */ |
| 2618 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 2619 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 2620 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 2621 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 2622 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2623 | /* Check if NSAPI is already in use */ |
Harald Welte | b37515e | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 2624 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 2625 | if (pdp) { |
| 2626 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 2627 | if (pdp->sapi == act_req->req_llc_sapi && |
| 2628 | pdp->ti == transaction_id) { |
| 2629 | /* This apparently is a re-transmission of a PDP CTX |
| 2630 | * ACT REQ (our ACT ACK must have got dropped) */ |
Philipp Maier | d015cbd | 2017-02-27 17:58:31 +0100 | [diff] [blame] | 2631 | rc = gsm48_tx_gsm_act_pdp_acc(pdp); |
| 2632 | if (rc < 0) |
| 2633 | return rc; |
| 2634 | |
| 2635 | if (pdp->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 2636 | /* Also re-transmit the SNDCP XID message */ |
| 2637 | lle = &pdp->mm->gb.llme->lle[pdp->sapi]; |
| 2638 | rc = sndcp_sn_xid_req(lle,pdp->nsapi); |
| 2639 | if (rc < 0) |
| 2640 | return rc; |
| 2641 | } |
| 2642 | |
| 2643 | return 0; |
Harald Welte | b37515e | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 2644 | } |
| 2645 | |
| 2646 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2647 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2648 | GSM_CAUSE_NSAPI_IN_USE, |
| 2649 | 0, NULL); |
| 2650 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2651 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2652 | if (mmctx->ggsn_lookup) { |
| 2653 | if (mmctx->ggsn_lookup->sapi == act_req->req_llc_sapi && |
| 2654 | mmctx->ggsn_lookup->ti == transaction_id) { |
| 2655 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 2656 | "Re-transmission while doing look-up. Ignoring.\n"); |
| 2657 | return 0; |
| 2658 | } |
| 2659 | } |
| 2660 | |
Harald Welte | 19f9e30 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 2661 | /* Only increment counter for a real activation, after we checked |
| 2662 | * for re-transmissions */ |
| 2663 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 2664 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 2665 | /* Determine GGSN based on APN and subscription options */ |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2666 | ggsn = sgsn_mm_ctx_find_ggsn_ctx(mmctx, &tp, &gsm_cause, apn_str); |
| 2667 | if (ggsn) |
| 2668 | return activate_ggsn(mmctx, ggsn, transaction_id, |
| 2669 | act_req->req_nsapi, act_req->req_llc_sapi, |
| 2670 | &tp, 0); |
| 2671 | |
| 2672 | if (strlen(apn_str) == 0) |
| 2673 | goto no_context; |
| 2674 | if (!sgsn->cfg.dynamic_lookup) |
| 2675 | goto no_context; |
| 2676 | |
| 2677 | /* schedule a dynamic look-up */ |
Pau Espin Pedrol | b1d1c24 | 2018-10-30 17:27:59 +0100 | [diff] [blame] | 2678 | mmctx->ggsn_lookup = talloc_zero(tall_sgsn_ctx, struct sgsn_ggsn_lookup); |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2679 | if (!mmctx->ggsn_lookup) |
| 2680 | goto no_context; |
| 2681 | |
| 2682 | mmctx->ggsn_lookup->state = SGSN_GGSN_2DIGIT; |
| 2683 | mmctx->ggsn_lookup->mmctx = mmctx; |
| 2684 | strcpy(mmctx->ggsn_lookup->apn_str, apn_str); |
| 2685 | |
| 2686 | mmctx->ggsn_lookup->orig_msg = msg; |
| 2687 | mmctx->ggsn_lookup->tp = tp; |
| 2688 | |
| 2689 | mmctx->ggsn_lookup->ti = transaction_id; |
| 2690 | mmctx->ggsn_lookup->nsapi = act_req->req_nsapi; |
| 2691 | mmctx->ggsn_lookup->sapi = act_req->req_llc_sapi; |
| 2692 | |
| 2693 | hostname = osmo_apn_qualify_from_imsi(mmctx->imsi, |
| 2694 | mmctx->ggsn_lookup->apn_str, 0); |
| 2695 | |
| 2696 | LOGMMCTXP(LOGL_DEBUG, mmctx, "Going to query %s\n", hostname); |
| 2697 | rc = sgsn_ares_query(sgsn, hostname, |
| 2698 | ggsn_lookup_cb, mmctx->ggsn_lookup); |
| 2699 | if (rc != 0) { |
| 2700 | LOGMMCTXP(LOGL_ERROR, mmctx, "Failed to start ares query.\n"); |
| 2701 | goto no_context; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2702 | } |
Holger Hans Peter Freyther | 725f3f1 | 2017-01-26 11:05:33 +0100 | [diff] [blame] | 2703 | *delete = 0; |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 2704 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2705 | return 0; |
| 2706 | |
| 2707 | no_context: |
Harald Welte | 601cf12 | 2015-08-16 17:16:28 +0200 | [diff] [blame] | 2708 | LOGMMCTXP(LOGL_ERROR, mmctx, "No GGSN context found!\n"); |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 2709 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2710 | gsm_cause, 0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2711 | } |
| 2712 | |
Holger Hans Peter Freyther | ccd2312 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2713 | /* Section 9.5.1: Activate PDP Context Request */ |
| 2714 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 2715 | struct msgb *_msg) |
| 2716 | { |
Holger Hans Peter Freyther | 725f3f1 | 2017-01-26 11:05:33 +0100 | [diff] [blame] | 2717 | bool delete = 1; |
Holger Hans Peter Freyther | ccd2312 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2718 | struct msgb *msg; |
| 2719 | int rc; |
| 2720 | |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2721 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_ACTIVATE_REQUEST]); |
| 2722 | |
Holger Hans Peter Freyther | ccd2312 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2723 | /* |
| 2724 | * This is painful. We might not have a static GGSN |
| 2725 | * configuration and then would need to copy the msg |
| 2726 | * and re-do most of this routine (or call it again |
| 2727 | * and make sure it only goes through the dynamic |
| 2728 | * resolving. The question is what to optimize for |
| 2729 | * and the dynamic resolution will be the right thing |
| 2730 | * in the long run. |
| 2731 | */ |
Pau Espin Pedrol | 816a67d | 2018-08-15 13:53:48 +0200 | [diff] [blame] | 2732 | msg = bssgp_msgb_copy(_msg, __func__); |
Holger Hans Peter Freyther | ccd2312 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2733 | if (!msg) { |
| 2734 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(_msg); |
Neels Hofmeyr | 961bd0b | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2735 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Holger Hans Peter Freyther | ccd2312 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2736 | |
| 2737 | LOGMMCTXP(LOGL_ERROR, mmctx, "-> ACTIVATE PDP CONTEXT REQ failed copy.\n"); |
| 2738 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 2739 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 2740 | GSM_CAUSE_NET_FAIL, |
| 2741 | 0, NULL); |
| 2742 | } |
| 2743 | |
Holger Hans Peter Freyther | 725f3f1 | 2017-01-26 11:05:33 +0100 | [diff] [blame] | 2744 | rc = do_act_pdp_req(mmctx, msg, &delete); |
| 2745 | if (delete) |
| 2746 | msgb_free(msg); |
Holger Hans Peter Freyther | ccd2312 | 2015-05-24 16:48:22 +0800 | [diff] [blame] | 2747 | return rc; |
| 2748 | } |
| 2749 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2750 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2751 | static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2752 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2753 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | 961bd0b | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2754 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2755 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2756 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2757 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 2758 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2759 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_REQUEST]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2760 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2761 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 2762 | if (!pdp) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2763 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for " |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2764 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 2765 | mm->imsi, transaction_id); |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 2766 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2767 | } |
| 2768 | |
| 2769 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2770 | } |
| 2771 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2772 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
| 2773 | static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) |
| 2774 | { |
| 2775 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | 961bd0b | 2016-03-14 16:13:25 +0100 | [diff] [blame] | 2776 | uint8_t transaction_id = gsm48_hdr_trans_id(gh); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2777 | struct sgsn_pdp_ctx *pdp; |
| 2778 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2779 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n"); |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 2780 | rate_ctr_inc(&sgsn->rate_ctrs->ctr[CTR_PDP_UL_DEACTIVATE_ACCEPT]); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2781 | |
| 2782 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 2783 | if (!pdp) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2784 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for " |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2785 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 2786 | mm->imsi, transaction_id); |
| 2787 | return 0; |
| 2788 | } |
Pravin Kumarvel | 16606c9 | 2016-11-17 12:20:01 +0530 | [diff] [blame] | 2789 | /* stop timer 3395 */ |
| 2790 | pdpctx_timer_stop(pdp, 3395); |
Pau Espin Pedrol | a733a50 | 2018-07-13 16:37:22 +0200 | [diff] [blame] | 2791 | if (pdp->ggsn) |
| 2792 | return sgsn_delete_pdp_ctx(pdp); |
| 2793 | /* GTP side already detached, freeing */ |
| 2794 | sgsn_pdp_ctx_free(pdp); |
| 2795 | return 0; |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2796 | } |
| 2797 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2798 | static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2799 | { |
| 2800 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 2801 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2802 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 2803 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2804 | |
| 2805 | return 0; |
| 2806 | } |
| 2807 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2808 | static void pdpctx_timer_cb(void *_pdp) |
| 2809 | { |
| 2810 | struct sgsn_pdp_ctx *pdp = _pdp; |
| 2811 | |
| 2812 | pdp->num_T_exp++; |
| 2813 | |
| 2814 | switch (pdp->T) { |
| 2815 | case 3395: /* waiting for PDP CTX DEACT ACK */ |
Pau Espin Pedrol | 20795e3 | 2019-05-28 21:25:06 +0200 | [diff] [blame] | 2816 | if (pdp->num_T_exp > T339X_MAX_RETRANS) { |
| 2817 | LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired > %d times\n", T339X_MAX_RETRANS); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2818 | pdp->state = PDP_STATE_INACTIVE; |
Pau Espin Pedrol | a733a50 | 2018-07-13 16:37:22 +0200 | [diff] [blame] | 2819 | if (pdp->ggsn) |
| 2820 | sgsn_delete_pdp_ctx(pdp); |
| 2821 | else |
| 2822 | sgsn_pdp_ctx_free(pdp); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2823 | break; |
| 2824 | } |
Pau Espin Pedrol | 9b5d7f6 | 2018-07-16 14:31:15 +0200 | [diff] [blame] | 2825 | _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, GSM_CAUSE_NET_FAIL, true); |
| 2826 | pdpctx_timer_rearm(pdp, 3395, sgsn->cfg.timers.T3395); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2827 | break; |
| 2828 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 2829 | LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n", |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2830 | pdp->T); |
| 2831 | } |
| 2832 | } |
| 2833 | |
| 2834 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2835 | /* GPRS Session Management */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2836 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 2837 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2838 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2839 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2840 | int rc; |
| 2841 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2842 | /* MMCTX can be NULL when called */ |
| 2843 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2844 | if (!mmctx) { |
| 2845 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2846 | /* 6.1.3.6 */ |
| 2847 | if (gh->msg_type == GSM48_MT_GSM_STATUS) |
| 2848 | return 0; |
| 2849 | |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2850 | return gsm0408_gprs_force_reattach_oldmsg(msg, llme); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2851 | } |
| 2852 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2853 | switch (gh->msg_type) { |
| 2854 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2855 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2856 | break; |
| 2857 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2858 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 2859 | break; |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 2860 | case GSM48_MT_GSM_DEACT_PDP_ACK: |
| 2861 | rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); |
| 2862 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2863 | case GSM48_MT_GSM_STATUS: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2864 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2865 | break; |
| 2866 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 2867 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 2868 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
Harald Welte | 6a19dd0 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2869 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x: %s\n", |
| 2870 | gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 2871 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2872 | break; |
| 2873 | default: |
Harald Welte | 6a19dd0 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2874 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x: %s\n", |
| 2875 | gh->msg_type, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 2876 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2877 | break; |
| 2878 | |
| 2879 | } |
| 2880 | |
| 2881 | return rc; |
| 2882 | } |
| 2883 | |
Max | b997f84 | 2016-07-06 15:57:01 +0200 | [diff] [blame] | 2884 | int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg, |
| 2885 | struct gprs_llc_llme *llme) |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2886 | { |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2887 | int rc; |
Alexander Couzens | a173566 | 2016-08-30 18:50:58 +0200 | [diff] [blame] | 2888 | if (llme) |
| 2889 | gprs_llgmm_reset_oldmsg(msg, GPRS_SAPI_GMM, llme); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2890 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2891 | rc = gsm48_tx_gmm_detach_req_oldmsg( |
| 2892 | msg, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2893 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 2894 | return rc; |
| 2895 | } |
| 2896 | |
| 2897 | int gsm0408_gprs_force_reattach(struct sgsn_mm_ctx *mmctx) |
| 2898 | { |
| 2899 | int rc; |
Harald Welte | dbc72b3 | 2015-12-25 22:23:27 +0100 | [diff] [blame] | 2900 | if (mmctx->ran_type == MM_CTX_T_GERAN_Gb) |
| 2901 | gprs_llgmm_reset(mmctx->gb.llme); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2902 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2903 | rc = gsm48_tx_gmm_detach_req( |
| 2904 | mmctx, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2905 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2906 | mm_ctx_cleanup_free(mmctx, "forced reattach"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2907 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 2908 | return rc; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 2909 | } |
| 2910 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 2911 | /* Main entry point for incoming 04.08 GPRS messages from Iu */ |
| 2912 | int gsm0408_gprs_rcvmsg_iu(struct msgb *msg, struct gprs_ra_id *ra_id, |
| 2913 | uint16_t *sai) |
| 2914 | { |
| 2915 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 2916 | uint8_t pdisc = gsm48_hdr_pdisc(gh); |
| 2917 | struct sgsn_mm_ctx *mmctx; |
| 2918 | int rc = -EINVAL; |
| 2919 | |
Pau Espin Pedrol | dfd7c24 | 2019-08-12 16:06:49 +0200 | [diff] [blame] | 2920 | mmctx = sgsn_mm_ctx_by_ue_ctx(MSG_IU_UE_CTX(msg)); |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 2921 | if (mmctx) { |
| 2922 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 2923 | if (ra_id) |
| 2924 | memcpy(&mmctx->ra, ra_id, sizeof(mmctx->ra)); |
| 2925 | } |
| 2926 | |
| 2927 | /* MMCTX can be NULL */ |
| 2928 | |
| 2929 | switch (pdisc) { |
| 2930 | case GSM48_PDISC_MM_GPRS: |
| 2931 | rc = gsm0408_rcv_gmm(mmctx, msg, NULL, false); |
Pau Espin Pedrol | 8a5c171 | 2018-01-07 18:15:19 +0100 | [diff] [blame] | 2932 | #pragma message "set drop_cipherable arg for gsm0408_rcv_gmm() from IuPS?" |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 2933 | break; |
| 2934 | case GSM48_PDISC_SM_GPRS: |
| 2935 | rc = gsm0408_rcv_gsm(mmctx, msg, NULL); |
| 2936 | break; |
| 2937 | default: |
| 2938 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 2939 | "Unknown GSM 04.08 discriminator 0x%02x: %s\n", |
| 2940 | pdisc, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
| 2941 | /* FIXME: return status message */ |
| 2942 | break; |
| 2943 | } |
| 2944 | |
| 2945 | /* MMCTX can be invalid */ |
| 2946 | |
| 2947 | return rc; |
| 2948 | } |
| 2949 | |
Harald Welte | 49393e1 | 2015-12-25 19:14:57 +0100 | [diff] [blame] | 2950 | /* Main entry point for incoming 04.08 GPRS messages from Gb */ |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2951 | int gsm0408_gprs_rcvmsg_gb(struct msgb *msg, struct gprs_llc_llme *llme, |
| 2952 | bool drop_cipherable) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2953 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 2954 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Neels Hofmeyr | 531734a | 2016-03-14 16:13:24 +0100 | [diff] [blame] | 2955 | uint8_t pdisc = gsm48_hdr_pdisc(gh); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2956 | struct sgsn_mm_ctx *mmctx; |
| 2957 | struct gprs_ra_id ra_id; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2958 | int rc = -EINVAL; |
| 2959 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2960 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 2961 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2962 | if (mmctx) { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2963 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2964 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 2965 | mmctx->gb.llme = llme; |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 2966 | } |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 2967 | |
| 2968 | /* MMCTX can be NULL */ |
| 2969 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2970 | switch (pdisc) { |
| 2971 | case GSM48_PDISC_MM_GPRS: |
Max | 8204010 | 2016-07-06 11:59:18 +0200 | [diff] [blame] | 2972 | rc = gsm0408_rcv_gmm(mmctx, msg, llme, drop_cipherable); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2973 | break; |
| 2974 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 2975 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2976 | break; |
| 2977 | default: |
Harald Welte | eb98c74 | 2015-08-16 17:11:32 +0200 | [diff] [blame] | 2978 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 2979 | "Unknown GSM 04.08 discriminator 0x%02x: %s\n", |
Harald Welte | 6a19dd0 | 2015-08-16 12:18:13 +0200 | [diff] [blame] | 2980 | pdisc, osmo_hexdump((uint8_t *)gh, msgb_l3len(msg))); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 2981 | /* FIXME: return status message */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2982 | break; |
| 2983 | } |
| 2984 | |
Jacob Erlbeck | 258ce3d | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 2985 | /* MMCTX can be invalid */ |
| 2986 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2987 | return rc; |
| 2988 | } |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 2989 | |
| 2990 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 2991 | { |
| 2992 | struct sgsn_mm_ctx *mmctx; |
| 2993 | |
| 2994 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 2995 | if (!mmctx) { |
| 2996 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 2997 | "TLLI=%08x\n", tlli); |
| 2998 | return -EINVAL; |
| 2999 | } |
| 3000 | |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 3001 | if (mmctx->gmm_state != GMM_REGISTERED_NORMAL && |
| 3002 | mmctx->gmm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 3003 | LOGMMCTXP(LOGL_NOTICE, mmctx, "SUSPEND request while state " |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 3004 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 3005 | return -EINVAL; |
| 3006 | } |
| 3007 | |
| 3008 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 3009 | mmctx->gmm_state = GMM_REGISTERED_SUSPENDED; |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 3010 | return 0; |
| 3011 | } |
| 3012 | |
| 3013 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 3014 | uint8_t suspend_ref) |
| 3015 | { |
| 3016 | struct sgsn_mm_ctx *mmctx; |
| 3017 | |
| 3018 | /* FIXME: make use of suspend reference? */ |
| 3019 | |
| 3020 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 3021 | if (!mmctx) { |
| 3022 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 3023 | "TLLI=%08x\n", tlli); |
| 3024 | return -EINVAL; |
| 3025 | } |
| 3026 | |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 3027 | if (mmctx->gmm_state != GMM_REGISTERED_NORMAL && |
| 3028 | mmctx->gmm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 3029 | LOGMMCTXP(LOGL_NOTICE, mmctx, "RESUME request while state " |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 3030 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 3031 | /* FIXME: should we not simply ignore it? */ |
| 3032 | return -EINVAL; |
| 3033 | } |
| 3034 | |
| 3035 | /* Transition from SUSPENDED to NORMAL */ |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 3036 | mmctx->gmm_state = GMM_REGISTERED_NORMAL; |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 3037 | return 0; |
| 3038 | } |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 3039 | |
| 3040 | #ifdef BUILD_IU |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 3041 | int iu_rab_act_ps(uint8_t rab_id, struct sgsn_pdp_ctx *pdp) |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 3042 | { |
| 3043 | struct msgb *msg; |
| 3044 | struct sgsn_mm_ctx *mm = pdp->mm; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 3045 | struct ranap_ue_conn_ctx *uectx; |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 3046 | uint32_t ggsn_ip; |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 3047 | bool use_x213_nsap; |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 3048 | |
| 3049 | uectx = mm->iu.ue_ctx; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 3050 | use_x213_nsap = (uectx->rab_assign_addr_enc == RANAP_NSAP_ADDR_ENC_X213); |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 3051 | |
| 3052 | /* Get the IP address for ggsn user plane */ |
| 3053 | memcpy(&ggsn_ip, pdp->lib->gsnru.v, pdp->lib->gsnru.l); |
| 3054 | ggsn_ip = htonl(ggsn_ip); |
| 3055 | |
| 3056 | LOGP(DRANAP, LOGL_DEBUG, "Assigning RAB: rab_id=%d, ggsn_ip=%x," |
| 3057 | " teid_gn=%x, use_x213_nsap=%d\n", |
| 3058 | rab_id, ggsn_ip, pdp->lib->teid_gn, use_x213_nsap); |
| 3059 | |
| 3060 | msg = ranap_new_msg_rab_assign_data(rab_id, ggsn_ip, |
| 3061 | pdp->lib->teid_gn, use_x213_nsap); |
| 3062 | msg->l2h = msg->data; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 3063 | return ranap_iu_rab_act(uectx, msg); |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 3064 | } |
| 3065 | #endif |