Pau Espin Pedrol | 58101ea | 2023-01-09 12:29:27 +0100 | [diff] [blame^] | 1 | /* Mobility Management context */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 2 | |
| 3 | /* (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| 4 | * |
| 5 | * All Rights Reserved |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 8 | * it under the terms of the GNU Affero General Public License as published by |
| 9 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 15 | * GNU Affero General Public License for more details. |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 16 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * You should have received a copy of the GNU Affero General Public License |
| 18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 19 | * |
| 20 | */ |
| 21 | |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 22 | #include <stdint.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 23 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 24 | #include <osmocom/core/linuxlist.h> |
| 25 | #include <osmocom/core/talloc.h> |
| 26 | #include <osmocom/core/timer.h> |
| 27 | #include <osmocom/core/rate_ctr.h> |
Jacob Erlbeck | 46caed8 | 2015-11-02 15:15:38 +0100 | [diff] [blame] | 28 | #include <osmocom/core/stats.h> |
Harald Welte | fdf453c | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 29 | #include <osmocom/core/backtrace.h> |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 30 | #include <osmocom/ctrl/control_if.h> |
| 31 | #include <osmocom/ctrl/ports.h> |
Alexander Couzens | f23e2db | 2020-07-27 22:39:58 +0200 | [diff] [blame] | 32 | #include <osmocom/gprs/gprs_ns2.h> |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 33 | #include <osmocom/gprs/gprs_bssgp.h> |
Harald Welte | 53373bc | 2016-04-20 17:11:43 +0200 | [diff] [blame] | 34 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
Harald Welte | 7e82b74 | 2017-08-12 13:43:54 +0200 | [diff] [blame] | 35 | #include <osmocom/gsm/apn.h> |
Neels Hofmeyr | ee6cfdc | 2017-07-13 02:03:50 +0200 | [diff] [blame] | 36 | #include <osmocom/gsm/gsm_utils.h> |
Pau Espin Pedrol | 73b2bf3 | 2018-10-30 18:00:57 +0100 | [diff] [blame] | 37 | #include <osmocom/gsm/gsup.h> |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 38 | |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 39 | #include <osmocom/sgsn/gprs_subscriber.h> |
| 40 | #include <osmocom/sgsn/debug.h> |
Pau Espin Pedrol | 58101ea | 2023-01-09 12:29:27 +0100 | [diff] [blame^] | 41 | #include <osmocom/sgsn/mmctx.h> |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 42 | #include <osmocom/sgsn/sgsn.h> |
| 43 | #include <osmocom/sgsn/gprs_gmm.h> |
Pau Espin Pedrol | 35f0e66 | 2019-09-02 18:27:27 +0200 | [diff] [blame] | 44 | #include <osmocom/sgsn/gprs_sm.h> |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 45 | #include <osmocom/sgsn/gprs_utils.h> |
| 46 | #include <osmocom/sgsn/signal.h> |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 47 | #include <osmocom/sgsn/gprs_gmm_attach.h> |
Pau Espin Pedrol | 02514bc | 2019-08-30 16:14:22 +0200 | [diff] [blame] | 48 | #include <osmocom/sgsn/gprs_mm_state_gb_fsm.h> |
Pau Espin Pedrol | ccd1252 | 2019-08-30 17:06:36 +0200 | [diff] [blame] | 49 | #include <osmocom/sgsn/gprs_mm_state_iu_fsm.h> |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 50 | #include <osmocom/sgsn/gprs_gmm_fsm.h> |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 51 | #include <osmocom/sgsn/gprs_llc.h> |
Pau Espin Pedrol | 52c9b8e | 2023-01-05 18:56:13 +0100 | [diff] [blame] | 52 | #include <osmocom/sgsn/gprs_sndcp.h> |
Pau Espin Pedrol | 5f4736a | 2023-01-04 21:30:28 +0100 | [diff] [blame] | 53 | #include <osmocom/sgsn/gtp_ggsn.h> |
Pau Espin Pedrol | 8ec269a | 2023-01-05 19:19:32 +0100 | [diff] [blame] | 54 | #include <osmocom/sgsn/gtp.h> |
Pau Espin Pedrol | 05190c3 | 2023-01-05 20:13:13 +0100 | [diff] [blame] | 55 | #include <osmocom/sgsn/pdpctx.h> |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 56 | |
Neels Hofmeyr | f4daf16 | 2016-05-21 00:44:50 +0200 | [diff] [blame] | 57 | #include <pdp.h> |
| 58 | |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 59 | #include <time.h> |
| 60 | |
Pau Espin Pedrol | f44dfa8 | 2023-01-09 13:01:00 +0100 | [diff] [blame] | 61 | #include "../../config.h" |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 62 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 63 | LLIST_HEAD(sgsn_mm_ctxts); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 64 | |
Pau Espin Pedrol | fd815bb | 2019-08-30 18:32:42 +0200 | [diff] [blame] | 65 | const struct value_string sgsn_ran_type_names[] = { |
| 66 | { MM_CTX_T_GERAN_Gb, "GPRS/EDGE via Gb" }, |
| 67 | { MM_CTX_T_UTRAN_Iu, "UMTS via Iu" }, |
| 68 | #if 0 |
| 69 | { MM_CTX_T_GERAN_Iu, "GPRS/EDGE via Iu" }, |
| 70 | #endif |
| 71 | { 0, NULL } |
| 72 | }; |
| 73 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 74 | static const struct rate_ctr_desc mmctx_ctr_description[] = { |
Pau Espin Pedrol | dc730a3 | 2017-11-28 19:40:34 +0100 | [diff] [blame] | 75 | { "sign:packets:in", "Signalling Messages ( In)" }, |
| 76 | { "sign:packets:out", "Signalling Messages (Out)" }, |
| 77 | { "udata:packets:in", "User Data Messages ( In)" }, |
| 78 | { "udata:packets:out", "User Data Messages (Out)" }, |
| 79 | { "udata:bytes:in", "User Data Bytes ( In)" }, |
| 80 | { "udata:bytes:out", "User Data Bytes (Out)" }, |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 81 | { "pdp_ctx_act", "PDP Context Activations " }, |
| 82 | { "suspend", "SUSPEND Count " }, |
Pau Espin Pedrol | dc730a3 | 2017-11-28 19:40:34 +0100 | [diff] [blame] | 83 | { "paging:ps", "Paging Packet Switched " }, |
| 84 | { "paging:cs", "Paging Circuit Switched " }, |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 85 | { "ra_update", "Routing Area Update " }, |
| 86 | }; |
| 87 | |
| 88 | static const struct rate_ctr_group_desc mmctx_ctrg_desc = { |
Pau Espin Pedrol | dc730a3 | 2017-11-28 19:40:34 +0100 | [diff] [blame] | 89 | .group_name_prefix = "sgsn:mmctx", |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 90 | .group_description = "SGSN MM Context Statistics", |
| 91 | .num_ctr = ARRAY_SIZE(mmctx_ctr_description), |
| 92 | .ctr_desc = mmctx_ctr_description, |
Jacob Erlbeck | 46caed8 | 2015-11-02 15:15:38 +0100 | [diff] [blame] | 93 | .class_id = OSMO_STATS_CLASS_SUBSCRIBER, |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 94 | }; |
| 95 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 96 | /* look-up an SGSN MM context based on Iu UE context (struct ue_conn_ctx)*/ |
| 97 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_ue_ctx(const void *uectx) |
| 98 | { |
| 99 | struct sgsn_mm_ctx *ctx; |
| 100 | |
| 101 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
| 102 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu |
| 103 | && uectx == ctx->iu.ue_ctx) |
| 104 | return ctx; |
| 105 | } |
| 106 | |
| 107 | return NULL; |
| 108 | } |
| 109 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 110 | /* look-up a SGSN MM context based on TLLI + RAI */ |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 111 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli(uint32_t tlli, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 112 | const struct gprs_ra_id *raid) |
| 113 | { |
| 114 | struct sgsn_mm_ctx *ctx; |
| 115 | |
| 116 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 117 | if ((tlli == ctx->gb.tlli || tlli == ctx->gb.tlli_new) && |
Jacob Erlbeck | e7bcdc3 | 2016-01-04 18:43:34 +0100 | [diff] [blame] | 118 | gprs_ra_id_equals(raid, &ctx->ra)) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 119 | return ctx; |
| 120 | } |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 121 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 122 | return NULL; |
| 123 | } |
| 124 | |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 125 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli_and_ptmsi(uint32_t tlli, |
| 126 | const struct gprs_ra_id *raid) |
| 127 | { |
| 128 | struct sgsn_mm_ctx *ctx; |
| 129 | int tlli_type; |
| 130 | |
| 131 | /* TODO: Also check the P_TMSI signature to be safe. That signature |
| 132 | * should be different (at least with a sufficiently high probability) |
| 133 | * after SGSN restarts and for multiple SGSN instances. |
| 134 | */ |
| 135 | |
| 136 | tlli_type = gprs_tlli_type(tlli); |
| 137 | if (tlli_type != TLLI_FOREIGN && tlli_type != TLLI_LOCAL) |
| 138 | return NULL; |
| 139 | |
| 140 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
| 141 | if ((gprs_tmsi2tlli(ctx->p_tmsi, tlli_type) == tlli || |
| 142 | gprs_tmsi2tlli(ctx->p_tmsi_old, tlli_type) == tlli) && |
| 143 | gprs_ra_id_equals(raid, &ctx->ra)) |
| 144 | return ctx; |
| 145 | } |
| 146 | |
| 147 | return NULL; |
| 148 | } |
| 149 | |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 150 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_ptmsi(uint32_t p_tmsi) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 151 | { |
| 152 | struct sgsn_mm_ctx *ctx; |
| 153 | |
| 154 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 155 | if (p_tmsi == ctx->p_tmsi || |
| 156 | (ctx->p_tmsi_old && ctx->p_tmsi_old == p_tmsi)) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 157 | return ctx; |
| 158 | } |
| 159 | return NULL; |
| 160 | } |
| 161 | |
| 162 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_imsi(const char *imsi) |
| 163 | { |
| 164 | struct sgsn_mm_ctx *ctx; |
| 165 | |
| 166 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
| 167 | if (!strcmp(imsi, ctx->imsi)) |
| 168 | return ctx; |
| 169 | } |
| 170 | return NULL; |
| 171 | |
| 172 | } |
| 173 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 174 | /* Allocate a new SGSN MM context, generic part */ |
| 175 | struct sgsn_mm_ctx *sgsn_mm_ctx_alloc(uint32_t rate_ctr_id) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 176 | { |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 177 | struct sgsn_mm_ctx *ctx; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 178 | |
Pau Espin Pedrol | b1d1c24 | 2018-10-30 17:27:59 +0100 | [diff] [blame] | 179 | ctx = talloc_zero(tall_sgsn_ctx, struct sgsn_mm_ctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 180 | if (!ctx) |
| 181 | return NULL; |
| 182 | |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 183 | ctx->auth_triplet.key_seq = GSM_KEY_SEQ_INVAL; |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 184 | ctx->ctrg = rate_ctr_group_alloc(ctx, &mmctx_ctrg_desc, rate_ctr_id); |
Harald Welte | 26c1465 | 2017-07-12 00:25:51 +0200 | [diff] [blame] | 185 | if (!ctx->ctrg) { |
| 186 | LOGMMCTXP(LOGL_ERROR, ctx, "Cannot allocate counter group\n"); |
| 187 | talloc_free(ctx); |
| 188 | return NULL; |
| 189 | } |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 190 | |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 191 | ctx->gmm_fsm = osmo_fsm_inst_alloc(&gmm_fsm, ctx, ctx, LOGL_DEBUG, "gmm_fsm"); |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 192 | if (!ctx->gmm_fsm) |
| 193 | goto out; |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 194 | ctx->gmm_att_req.fsm = osmo_fsm_inst_alloc(&gmm_attach_req_fsm, ctx, ctx, LOGL_DEBUG, "gb_gmm_req"); |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 195 | if (!ctx->gmm_att_req.fsm) |
| 196 | goto out; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 197 | ctx->gb.mm_state_fsm = osmo_fsm_inst_alloc(&mm_state_gb_fsm, ctx, ctx, LOGL_DEBUG, NULL); |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 198 | if (!ctx->gb.mm_state_fsm) |
| 199 | goto out; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 200 | #ifdef BUILD_IU |
| 201 | ctx->iu.mm_state_fsm = osmo_fsm_inst_alloc(&mm_state_iu_fsm, ctx, ctx, LOGL_DEBUG, NULL); |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 202 | if (!ctx->iu.mm_state_fsm) |
| 203 | goto out; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 204 | #endif |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 205 | |
Harald Welte | 6ffbaab | 2010-05-18 12:44:45 +0200 | [diff] [blame] | 206 | INIT_LLIST_HEAD(&ctx->pdp_list); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 207 | |
| 208 | llist_add(&ctx->list, &sgsn_mm_ctxts); |
| 209 | |
| 210 | return ctx; |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 211 | |
| 212 | out: |
| 213 | if (ctx->iu.mm_state_fsm) |
| 214 | osmo_fsm_inst_free(ctx->iu.mm_state_fsm); |
| 215 | if (ctx->gb.mm_state_fsm) |
| 216 | osmo_fsm_inst_free(ctx->gb.mm_state_fsm); |
| 217 | if (ctx->gmm_att_req.fsm) |
| 218 | osmo_fsm_inst_free(ctx->gmm_att_req.fsm); |
| 219 | if (ctx->gmm_fsm) |
| 220 | osmo_fsm_inst_free(ctx->gmm_fsm); |
| 221 | |
| 222 | rate_ctr_group_free(ctx->ctrg); |
| 223 | talloc_free(ctx); |
| 224 | |
| 225 | return NULL; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 226 | } |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 227 | /* Allocate a new SGSN MM context for GERAN_Gb */ |
| 228 | struct sgsn_mm_ctx *sgsn_mm_ctx_alloc_gb(uint32_t tlli, |
| 229 | const struct gprs_ra_id *raid) |
| 230 | { |
| 231 | struct sgsn_mm_ctx *ctx; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 232 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 233 | ctx = sgsn_mm_ctx_alloc(tlli); |
| 234 | if (!ctx) |
| 235 | return NULL; |
| 236 | |
| 237 | memcpy(&ctx->ra, raid, sizeof(ctx->ra)); |
| 238 | ctx->ran_type = MM_CTX_T_GERAN_Gb; |
| 239 | ctx->gb.tlli = tlli; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 240 | osmo_fsm_inst_update_id_f(ctx->gb.mm_state_fsm, "%" PRIu32, tlli); |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 241 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 242 | return ctx; |
| 243 | } |
| 244 | |
| 245 | /* Allocate a new SGSN MM context for UTRAN_Iu */ |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 246 | struct sgsn_mm_ctx *sgsn_mm_ctx_alloc_iu(void *uectx) |
| 247 | { |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 248 | #if BUILD_IU |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 249 | struct sgsn_mm_ctx *ctx; |
Max | 794693c | 2017-12-20 11:38:01 +0100 | [diff] [blame] | 250 | struct ranap_ue_conn_ctx *ue_ctx = uectx; |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 251 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 252 | ctx = sgsn_mm_ctx_alloc(ue_ctx->conn_id); |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 253 | if (!ctx) |
| 254 | return NULL; |
| 255 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 256 | /* Need to get RAID from IU conn */ |
| 257 | ctx->ra = ue_ctx->ra_id; |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 258 | ctx->ran_type = MM_CTX_T_UTRAN_Iu; |
Max | 794693c | 2017-12-20 11:38:01 +0100 | [diff] [blame] | 259 | ctx->iu.ue_ctx = ue_ctx; |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 260 | ctx->iu.ue_ctx->rab_assign_addr_enc = sgsn->cfg.iu.rab_assign_addr_enc; |
Daniel Willmann | 3ecfbbb | 2016-05-21 00:16:55 +0200 | [diff] [blame] | 261 | ctx->iu.new_key = 1; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 262 | osmo_fsm_inst_update_id_f(ctx->iu.mm_state_fsm, "%" PRIu32, ue_ctx->conn_id); |
Pau Espin Pedrol | ccd1252 | 2019-08-30 17:06:36 +0200 | [diff] [blame] | 263 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 264 | |
| 265 | return ctx; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 266 | #else |
| 267 | return NULL; |
| 268 | #endif |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | |
Harald Welte | 7b022ee | 2012-07-14 12:04:04 +0200 | [diff] [blame] | 272 | /* this is a hard _free_ function, it doesn't clean up the PDP contexts |
| 273 | * in libgtp! */ |
Holger Hans Peter Freyther | b448dd8 | 2015-05-03 11:46:58 +0200 | [diff] [blame] | 274 | static void sgsn_mm_ctx_free(struct sgsn_mm_ctx *mm) |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 275 | { |
| 276 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 277 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 278 | /* Unlink from global list of MM contexts */ |
| 279 | llist_del(&mm->list); |
| 280 | |
| 281 | /* Free all PDP contexts */ |
| 282 | llist_for_each_entry_safe(pdp, pdp2, &mm->pdp_list, list) |
| 283 | sgsn_pdp_ctx_free(pdp); |
| 284 | |
| 285 | rate_ctr_group_free(mm->ctrg); |
| 286 | |
| 287 | talloc_free(mm); |
| 288 | } |
| 289 | |
| 290 | void sgsn_mm_ctx_cleanup_free(struct sgsn_mm_ctx *mm) |
| 291 | { |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 292 | struct gprs_llc_llme *llme = NULL; |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 293 | struct sgsn_pdp_ctx *pdp, *pdp2; |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 294 | struct sgsn_signal_data sig_data; |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 295 | |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 296 | if (mm->ran_type == MM_CTX_T_GERAN_Gb) |
| 297 | llme = mm->gb.llme; |
| 298 | else |
| 299 | OSMO_ASSERT(mm->gb.llme == NULL); |
| 300 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 301 | /* Forget about ongoing look-ups */ |
| 302 | if (mm->ggsn_lookup) { |
| 303 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 304 | "Cleaning mmctx with on-going query.\n"); |
| 305 | mm->ggsn_lookup->mmctx = NULL; |
| 306 | mm->ggsn_lookup = NULL; |
| 307 | } |
| 308 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 309 | /* delete all existing PDP contexts for this MS */ |
| 310 | llist_for_each_entry_safe(pdp, pdp2, &mm->pdp_list, list) { |
| 311 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 312 | "Dropping PDP context for NSAPI=%u\n", pdp->nsapi); |
| 313 | sgsn_pdp_ctx_terminate(pdp); |
| 314 | } |
| 315 | |
Jacob Erlbeck | ae20b4b | 2014-10-20 16:05:55 +0200 | [diff] [blame] | 316 | if (osmo_timer_pending(&mm->timer)) { |
| 317 | LOGMMCTXP(LOGL_INFO, mm, "Cancelling MM timer %u\n", mm->T); |
| 318 | osmo_timer_del(&mm->timer); |
| 319 | } |
| 320 | |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 321 | memset(&sig_data, 0, sizeof(sig_data)); |
| 322 | sig_data.mm = mm; |
| 323 | osmo_signal_dispatch(SS_SGSN, S_SGSN_MM_FREE, &sig_data); |
| 324 | |
| 325 | |
Jacob Erlbeck | be2c8d9 | 2014-11-12 10:18:09 +0100 | [diff] [blame] | 326 | /* Detach from subscriber which is possibly freed then */ |
| 327 | if (mm->subscr) { |
Neels Hofmeyr | 0e5d807 | 2017-01-10 00:49:56 +0100 | [diff] [blame] | 328 | struct gprs_subscr *subscr = gprs_subscr_get(mm->subscr); |
Jacob Erlbeck | 3e4e58f | 2015-01-26 11:07:24 +0100 | [diff] [blame] | 329 | gprs_subscr_cleanup(subscr); |
Neels Hofmeyr | 0e5d807 | 2017-01-10 00:49:56 +0100 | [diff] [blame] | 330 | gprs_subscr_put(subscr); |
Jacob Erlbeck | be2c8d9 | 2014-11-12 10:18:09 +0100 | [diff] [blame] | 331 | } |
| 332 | |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 333 | if (mm->gmm_att_req.fsm) |
| 334 | gmm_att_req_free(mm); |
Pau Espin Pedrol | 02514bc | 2019-08-30 16:14:22 +0200 | [diff] [blame] | 335 | if (mm->gb.mm_state_fsm) |
| 336 | osmo_fsm_inst_free(mm->gb.mm_state_fsm); |
Pau Espin Pedrol | ccd1252 | 2019-08-30 17:06:36 +0200 | [diff] [blame] | 337 | if (mm->iu.mm_state_fsm) |
| 338 | osmo_fsm_inst_free(mm->iu.mm_state_fsm); |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 339 | if (mm->gmm_fsm) |
| 340 | osmo_fsm_inst_free(mm->gmm_fsm); |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 341 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 342 | sgsn_mm_ctx_free(mm); |
| 343 | mm = NULL; |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 344 | |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 345 | if (llme) { |
| 346 | /* TLLI unassignment, must be called after sgsn_mm_ctx_free */ |
Pau Espin Pedrol | 788863c | 2019-08-12 18:31:22 +0200 | [diff] [blame] | 347 | if (gprs_llgmm_unassign(llme) < 0) |
| 348 | LOGMMCTXP(LOGL_ERROR, mm, "gprs_llgmm_unassign failed, llme not freed!\n"); |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 349 | } |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 350 | } |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 351 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 352 | |
Harald Welte | 96df606 | 2010-06-03 06:37:26 +0200 | [diff] [blame] | 353 | /* look up PDP context by MM context and NSAPI */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 354 | struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_nsapi(const struct sgsn_mm_ctx *mm, |
| 355 | uint8_t nsapi) |
| 356 | { |
| 357 | struct sgsn_pdp_ctx *pdp; |
| 358 | |
| 359 | llist_for_each_entry(pdp, &mm->pdp_list, list) { |
| 360 | if (pdp->nsapi == nsapi) |
| 361 | return pdp; |
| 362 | } |
| 363 | return NULL; |
| 364 | } |
| 365 | |
Harald Welte | 96df606 | 2010-06-03 06:37:26 +0200 | [diff] [blame] | 366 | /* look up PDP context by MM context and transaction ID */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 367 | struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tid(const struct sgsn_mm_ctx *mm, |
| 368 | uint8_t tid) |
| 369 | { |
| 370 | struct sgsn_pdp_ctx *pdp; |
| 371 | |
| 372 | llist_for_each_entry(pdp, &mm->pdp_list, list) { |
| 373 | if (pdp->ti == tid) |
| 374 | return pdp; |
| 375 | } |
| 376 | return NULL; |
| 377 | } |
| 378 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 379 | uint32_t sgsn_alloc_ptmsi(void) |
| 380 | { |
| 381 | struct sgsn_mm_ctx *mm; |
Alexander Couzens | 8a215c3 | 2017-02-03 23:22:18 +0100 | [diff] [blame] | 382 | uint32_t ptmsi = 0xdeadbeef; |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 383 | int max_retries = 100, rc = 0; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 384 | |
| 385 | restart: |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 386 | rc = osmo_get_rand_id((uint8_t *) &ptmsi, sizeof(ptmsi)); |
| 387 | if (rc < 0) |
Daniel Willmann | 044ce5f | 2015-10-12 19:36:33 +0200 | [diff] [blame] | 388 | goto failed; |
| 389 | |
Jacob Erlbeck | d8a6553 | 2015-01-15 18:51:31 +0100 | [diff] [blame] | 390 | /* Enforce that the 2 MSB are set without loosing the distance between |
| 391 | * identical values. Since rand() has no duplicate values within a |
| 392 | * period (because the size of the state is the same like the size of |
| 393 | * the random value), this leads to a distance of period/4 when the |
| 394 | * distribution of the 2 MSB is uniform. This approach fails with a |
| 395 | * probability of (3/4)^max_retries, only 1% of the approaches will |
| 396 | * need more than 16 numbers (even distribution assumed). |
| 397 | * |
| 398 | * Alternatively, a freeze list could be used if another PRNG is used |
| 399 | * or when this approach proves to be not sufficient. |
| 400 | */ |
Eric Wild | df9b391 | 2019-06-17 12:13:28 +0200 | [diff] [blame] | 401 | if (ptmsi >= GSM23003_TMSI_SGSN_MASK) { |
Jacob Erlbeck | d8a6553 | 2015-01-15 18:51:31 +0100 | [diff] [blame] | 402 | if (!max_retries--) |
| 403 | goto failed; |
| 404 | goto restart; |
| 405 | } |
Eric Wild | df9b391 | 2019-06-17 12:13:28 +0200 | [diff] [blame] | 406 | ptmsi |= GSM23003_TMSI_SGSN_MASK; |
Jacob Erlbeck | d8a6553 | 2015-01-15 18:51:31 +0100 | [diff] [blame] | 407 | |
| 408 | if (ptmsi == GSM_RESERVED_TMSI) { |
| 409 | if (!max_retries--) |
| 410 | goto failed; |
| 411 | goto restart; |
| 412 | } |
| 413 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 414 | llist_for_each_entry(mm, &sgsn_mm_ctxts, list) { |
Jacob Erlbeck | 08fbeb8 | 2014-09-19 09:28:42 +0200 | [diff] [blame] | 415 | if (mm->p_tmsi == ptmsi) { |
| 416 | if (!max_retries--) |
| 417 | goto failed; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 418 | goto restart; |
Jacob Erlbeck | 08fbeb8 | 2014-09-19 09:28:42 +0200 | [diff] [blame] | 419 | } |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 420 | } |
| 421 | |
| 422 | return ptmsi; |
Jacob Erlbeck | 08fbeb8 | 2014-09-19 09:28:42 +0200 | [diff] [blame] | 423 | |
| 424 | failed: |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 425 | LOGP(DGPRS, LOGL_ERROR, "Failed to allocate a P-TMSI: %d (%s)\n", rc, strerror(-rc)); |
Jacob Erlbeck | 08fbeb8 | 2014-09-19 09:28:42 +0200 | [diff] [blame] | 426 | return GSM_RESERVED_TMSI; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 427 | } |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 428 | |
Jacob Erlbeck | 555b2e5 | 2015-01-26 13:52:42 +0100 | [diff] [blame] | 429 | void sgsn_update_subscriber_data(struct sgsn_mm_ctx *mmctx) |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 430 | { |
Jacob Erlbeck | 555b2e5 | 2015-01-26 13:52:42 +0100 | [diff] [blame] | 431 | OSMO_ASSERT(mmctx != NULL); |
Jacob Erlbeck | c939196 | 2014-12-18 09:53:07 +0100 | [diff] [blame] | 432 | LOGMMCTXP(LOGL_INFO, mmctx, "Subscriber data update\n"); |
Jacob Erlbeck | be2c8d9 | 2014-11-12 10:18:09 +0100 | [diff] [blame] | 433 | |
Jacob Erlbeck | a0b6efb | 2014-11-13 10:48:39 +0100 | [diff] [blame] | 434 | sgsn_auth_update(mmctx); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 435 | } |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 436 | |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 437 | static void insert_extra(struct tlv_parsed *tp, |
| 438 | struct sgsn_subscriber_data *data, |
| 439 | struct sgsn_subscriber_pdp_data *pdp) |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 440 | { |
| 441 | tp->lv[OSMO_IE_GSM_SUB_QOS].len = pdp->qos_subscribed_len; |
| 442 | tp->lv[OSMO_IE_GSM_SUB_QOS].val = pdp->qos_subscribed; |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 443 | |
| 444 | /* Prefer PDP charging characteristics of per subscriber one */ |
| 445 | if (pdp->has_pdp_charg) { |
| 446 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].len = sizeof(pdp->pdp_charg); |
| 447 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].val = &pdp->pdp_charg[0]; |
| 448 | } else if (data->has_pdp_charg) { |
| 449 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].len = sizeof(data->pdp_charg); |
| 450 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].val = &data->pdp_charg[0]; |
| 451 | } |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | /** |
| 455 | * The tlv_parsed tp parameter will be modified to insert a |
| 456 | * OSMO_IE_GSM_SUB_QOS in case the data is available in the |
| 457 | * PDP context handling. |
| 458 | */ |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 459 | struct sgsn_ggsn_ctx *sgsn_mm_ctx_find_ggsn_ctx(struct sgsn_mm_ctx *mmctx, |
| 460 | struct tlv_parsed *tp, |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 461 | enum gsm48_gsm_cause *gsm_cause, |
| 462 | char *out_apn_str) |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 463 | { |
| 464 | char req_apn_str[GSM_APN_LENGTH] = {0}; |
| 465 | const struct apn_ctx *apn_ctx = NULL; |
| 466 | const char *selected_apn_str = NULL; |
| 467 | struct sgsn_subscriber_pdp_data *pdp; |
| 468 | struct sgsn_ggsn_ctx *ggsn = NULL; |
| 469 | int allow_any_apn = 0; |
| 470 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 471 | out_apn_str[0] = '\0'; |
| 472 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 473 | if (TLVP_PRESENT(tp, GSM48_IE_GSM_APN)) { |
| 474 | if (TLVP_LEN(tp, GSM48_IE_GSM_APN) >= GSM_APN_LENGTH - 1) { |
| 475 | LOGMMCTXP(LOGL_ERROR, mmctx, "APN IE too long\n"); |
| 476 | *gsm_cause = GSM_CAUSE_INV_MAND_INFO; |
| 477 | return NULL; |
| 478 | } |
| 479 | |
Harald Welte | 7e82b74 | 2017-08-12 13:43:54 +0200 | [diff] [blame] | 480 | osmo_apn_to_str(req_apn_str, |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 481 | TLVP_VAL(tp, GSM48_IE_GSM_APN), |
| 482 | TLVP_LEN(tp, GSM48_IE_GSM_APN)); |
| 483 | |
| 484 | if (strcmp(req_apn_str, "*") == 0) |
| 485 | req_apn_str[0] = 0; |
| 486 | } |
| 487 | |
Holger Hans Peter Freyther | 9270d99 | 2015-05-24 20:51:17 +0800 | [diff] [blame] | 488 | if (mmctx->subscr == NULL) |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 489 | allow_any_apn = 1; |
| 490 | |
| 491 | if (strlen(req_apn_str) == 0 && !allow_any_apn) { |
| 492 | /* No specific APN requested, check for an APN that is both |
| 493 | * granted and configured */ |
| 494 | |
| 495 | llist_for_each_entry(pdp, &mmctx->subscr->sgsn_data->pdp_list, list) { |
| 496 | if (strcmp(pdp->apn_str, "*") == 0) |
| 497 | { |
| 498 | allow_any_apn = 1; |
| 499 | selected_apn_str = ""; |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 500 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 501 | continue; |
| 502 | } |
Pau Espin Pedrol | fd4d435 | 2023-01-05 19:37:05 +0100 | [diff] [blame] | 503 | if (!llist_empty(&sgsn->apn_list)) { |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 504 | apn_ctx = sgsn_apn_ctx_match(req_apn_str, mmctx->imsi); |
| 505 | /* Not configured */ |
| 506 | if (apn_ctx == NULL) |
| 507 | continue; |
| 508 | } |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 509 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 510 | selected_apn_str = pdp->apn_str; |
| 511 | break; |
| 512 | } |
| 513 | } else if (!allow_any_apn) { |
| 514 | /* Check whether the given APN is granted */ |
| 515 | llist_for_each_entry(pdp, &mmctx->subscr->sgsn_data->pdp_list, list) { |
| 516 | if (strcmp(pdp->apn_str, "*") == 0) { |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 517 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 518 | selected_apn_str = req_apn_str; |
| 519 | allow_any_apn = 1; |
| 520 | continue; |
| 521 | } |
| 522 | if (strcasecmp(pdp->apn_str, req_apn_str) == 0) { |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 523 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 524 | selected_apn_str = req_apn_str; |
| 525 | break; |
| 526 | } |
| 527 | } |
| 528 | } else if (strlen(req_apn_str) != 0) { |
| 529 | /* Any APN is allowed */ |
| 530 | selected_apn_str = req_apn_str; |
| 531 | } else { |
| 532 | /* Prefer the GGSN associated with the wildcard APN */ |
| 533 | selected_apn_str = ""; |
| 534 | } |
| 535 | |
| 536 | if (!allow_any_apn && selected_apn_str == NULL) { |
| 537 | /* Access not granted */ |
| 538 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 539 | "The requested APN '%s' is not allowed\n", |
| 540 | req_apn_str); |
| 541 | *gsm_cause = GSM_CAUSE_REQ_SERV_OPT_NOTSUB; |
| 542 | return NULL; |
| 543 | } |
| 544 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 545 | /* copy the selected apn_str */ |
Holger Hans Peter Freyther | f2e114a | 2015-06-02 09:33:31 +0200 | [diff] [blame] | 546 | if (selected_apn_str) |
| 547 | strcpy(out_apn_str, selected_apn_str); |
| 548 | else |
| 549 | out_apn_str[0] = '\0'; |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 550 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 551 | if (apn_ctx == NULL && selected_apn_str) |
| 552 | apn_ctx = sgsn_apn_ctx_match(selected_apn_str, mmctx->imsi); |
| 553 | |
| 554 | if (apn_ctx != NULL) { |
| 555 | ggsn = apn_ctx->ggsn; |
Pau Espin Pedrol | fd4d435 | 2023-01-05 19:37:05 +0100 | [diff] [blame] | 556 | } else if (llist_empty(&sgsn->apn_list)) { |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 557 | /* No configuration -> use GGSN 0 */ |
Pau Espin Pedrol | 6956987 | 2023-01-05 19:39:01 +0100 | [diff] [blame] | 558 | ggsn = sgsn_ggsn_ctx_by_id(sgsn, 0); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 559 | } else if (allow_any_apn && |
| 560 | (selected_apn_str == NULL || strlen(selected_apn_str) == 0)) { |
| 561 | /* No APN given and no default configuration -> Use GGSN 0 */ |
Pau Espin Pedrol | 6956987 | 2023-01-05 19:39:01 +0100 | [diff] [blame] | 562 | ggsn = sgsn_ggsn_ctx_by_id(sgsn, 0); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 563 | } else { |
| 564 | /* No matching configuration found */ |
| 565 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 566 | "The selected APN '%s' has not been configured\n", |
| 567 | selected_apn_str); |
| 568 | *gsm_cause = GSM_CAUSE_MISSING_APN; |
| 569 | return NULL; |
| 570 | } |
| 571 | |
Holger Hans Peter Freyther | 08bb84b | 2015-05-25 14:35:10 +0800 | [diff] [blame] | 572 | if (!ggsn) { |
| 573 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 574 | "No static GGSN configured. Selected APN '%s'\n", |
| 575 | selected_apn_str); |
Vadim Yanitskiy | 4b8e309 | 2019-07-18 15:04:46 +0700 | [diff] [blame] | 576 | *gsm_cause = GSM_CAUSE_MISSING_APN; |
| 577 | return NULL; |
Holger Hans Peter Freyther | 08bb84b | 2015-05-25 14:35:10 +0800 | [diff] [blame] | 578 | } |
| 579 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 580 | LOGMMCTXP(LOGL_INFO, mmctx, |
| 581 | "Found GGSN %d for APN '%s' (requested '%s')\n", |
| 582 | ggsn->id, selected_apn_str ? selected_apn_str : "---", |
| 583 | req_apn_str); |
| 584 | |
| 585 | return ggsn; |
| 586 | } |