Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1 | /* GPRS SGSN functionality */ |
| 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> |
| 41 | #include <osmocom/sgsn/gprs_sgsn.h> |
| 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 | |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 61 | #include "../../bscconfig.h" |
| 62 | |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 63 | #define GPRS_LLME_CHECK_TICK 30 |
| 64 | |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 65 | extern struct osmo_tdef sgsn_T_defs[]; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 66 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 67 | LLIST_HEAD(sgsn_mm_ctxts); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 68 | |
Pau Espin Pedrol | fd815bb | 2019-08-30 18:32:42 +0200 | [diff] [blame] | 69 | const struct value_string sgsn_ran_type_names[] = { |
| 70 | { MM_CTX_T_GERAN_Gb, "GPRS/EDGE via Gb" }, |
| 71 | { MM_CTX_T_UTRAN_Iu, "UMTS via Iu" }, |
| 72 | #if 0 |
| 73 | { MM_CTX_T_GERAN_Iu, "GPRS/EDGE via Iu" }, |
| 74 | #endif |
| 75 | { 0, NULL } |
| 76 | }; |
| 77 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 78 | static const struct rate_ctr_desc mmctx_ctr_description[] = { |
Pau Espin Pedrol | dc730a3 | 2017-11-28 19:40:34 +0100 | [diff] [blame] | 79 | { "sign:packets:in", "Signalling Messages ( In)" }, |
| 80 | { "sign:packets:out", "Signalling Messages (Out)" }, |
| 81 | { "udata:packets:in", "User Data Messages ( In)" }, |
| 82 | { "udata:packets:out", "User Data Messages (Out)" }, |
| 83 | { "udata:bytes:in", "User Data Bytes ( In)" }, |
| 84 | { "udata:bytes:out", "User Data Bytes (Out)" }, |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 85 | { "pdp_ctx_act", "PDP Context Activations " }, |
| 86 | { "suspend", "SUSPEND Count " }, |
Pau Espin Pedrol | dc730a3 | 2017-11-28 19:40:34 +0100 | [diff] [blame] | 87 | { "paging:ps", "Paging Packet Switched " }, |
| 88 | { "paging:cs", "Paging Circuit Switched " }, |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 89 | { "ra_update", "Routing Area Update " }, |
| 90 | }; |
| 91 | |
| 92 | static const struct rate_ctr_group_desc mmctx_ctrg_desc = { |
Pau Espin Pedrol | dc730a3 | 2017-11-28 19:40:34 +0100 | [diff] [blame] | 93 | .group_name_prefix = "sgsn:mmctx", |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 94 | .group_description = "SGSN MM Context Statistics", |
| 95 | .num_ctr = ARRAY_SIZE(mmctx_ctr_description), |
| 96 | .ctr_desc = mmctx_ctr_description, |
Jacob Erlbeck | 46caed8 | 2015-11-02 15:15:38 +0100 | [diff] [blame] | 97 | .class_id = OSMO_STATS_CLASS_SUBSCRIBER, |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 98 | }; |
| 99 | |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 100 | static const struct rate_ctr_desc sgsn_ctr_description[] = { |
Harald Welte | b68413b | 2017-11-21 08:51:47 +0100 | [diff] [blame] | 101 | { "llc:dl_bytes", "Count sent LLC bytes before giving it to the bssgp layer" }, |
Ruben Undheim | 55fcf11 | 2018-09-25 22:59:34 +0200 | [diff] [blame] | 102 | { "llc:ul_bytes", "Count successful received LLC bytes (encrypt & fcs correct)" }, |
| 103 | { "llc:dl_packets", "Count successful sent LLC packets before giving it to the bssgp layer" }, |
| 104 | { "llc:ul_packets", "Count successful received LLC packets (encrypt & fcs correct)" }, |
Harald Welte | b68413b | 2017-11-21 08:51:47 +0100 | [diff] [blame] | 105 | { "gprs:attach_requested", "Received attach requests" }, |
| 106 | { "gprs:attach_accepted", "Sent attach accepts" }, |
| 107 | { "gprs:attach_rejected", "Sent attach rejects" }, |
| 108 | { "gprs:detach_requested", "Received detach requests" }, |
| 109 | { "gprs:detach_acked", "Sent detach acks" }, |
| 110 | { "gprs:routing_area_requested", "Received routing area requests" }, |
| 111 | { "gprs:routing_area_requested", "Sent routing area acks" }, |
| 112 | { "gprs:routing_area_requested", "Sent routing area rejects" }, |
| 113 | { "pdp:activate_requested", "Received activate requests" }, |
| 114 | { "pdp:activate_rejected", "Sent activate rejects" }, |
| 115 | { "pdp:activate_accepted", "Sent activate accepts" }, |
| 116 | { "pdp:request_activated", "unused" }, |
| 117 | { "pdp:request_activate_rejected", "unused" }, |
| 118 | { "pdp:modify_requested", "unused" }, |
| 119 | { "pdp:modify_accepted", "unused" }, |
| 120 | { "pdp:dl_deactivate_requested", "Sent deactivate requests" }, |
| 121 | { "pdp:dl_deactivate_accepted", "Sent deactivate accepted" }, |
| 122 | { "pdp:ul_deactivate_requested", "Received deactivate requests" }, |
| 123 | { "pdp:ul_deactivate_accepted", "Received deactivate accepts" }, |
Alexander Couzens | 14314bd | 2016-07-05 09:52:52 +0200 | [diff] [blame] | 124 | }; |
| 125 | |
| 126 | static const struct rate_ctr_group_desc sgsn_ctrg_desc = { |
| 127 | "sgsn", |
| 128 | "SGSN Overall Statistics", |
| 129 | OSMO_STATS_CLASS_GLOBAL, |
| 130 | ARRAY_SIZE(sgsn_ctr_description), |
| 131 | sgsn_ctr_description, |
| 132 | }; |
| 133 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 134 | /* look-up an SGSN MM context based on Iu UE context (struct ue_conn_ctx)*/ |
| 135 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_ue_ctx(const void *uectx) |
| 136 | { |
| 137 | struct sgsn_mm_ctx *ctx; |
| 138 | |
| 139 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
| 140 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu |
| 141 | && uectx == ctx->iu.ue_ctx) |
| 142 | return ctx; |
| 143 | } |
| 144 | |
| 145 | return NULL; |
| 146 | } |
| 147 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 148 | /* look-up a SGSN MM context based on TLLI + RAI */ |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 149 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli(uint32_t tlli, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 150 | const struct gprs_ra_id *raid) |
| 151 | { |
| 152 | struct sgsn_mm_ctx *ctx; |
| 153 | |
| 154 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 155 | if ((tlli == ctx->gb.tlli || tlli == ctx->gb.tlli_new) && |
Jacob Erlbeck | e7bcdc3 | 2016-01-04 18:43:34 +0100 | [diff] [blame] | 156 | gprs_ra_id_equals(raid, &ctx->ra)) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 157 | return ctx; |
| 158 | } |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 159 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 160 | return NULL; |
| 161 | } |
| 162 | |
Jacob Erlbeck | 5ac4aad | 2016-01-04 18:43:38 +0100 | [diff] [blame] | 163 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_tlli_and_ptmsi(uint32_t tlli, |
| 164 | const struct gprs_ra_id *raid) |
| 165 | { |
| 166 | struct sgsn_mm_ctx *ctx; |
| 167 | int tlli_type; |
| 168 | |
| 169 | /* TODO: Also check the P_TMSI signature to be safe. That signature |
| 170 | * should be different (at least with a sufficiently high probability) |
| 171 | * after SGSN restarts and for multiple SGSN instances. |
| 172 | */ |
| 173 | |
| 174 | tlli_type = gprs_tlli_type(tlli); |
| 175 | if (tlli_type != TLLI_FOREIGN && tlli_type != TLLI_LOCAL) |
| 176 | return NULL; |
| 177 | |
| 178 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
| 179 | if ((gprs_tmsi2tlli(ctx->p_tmsi, tlli_type) == tlli || |
| 180 | gprs_tmsi2tlli(ctx->p_tmsi_old, tlli_type) == tlli) && |
| 181 | gprs_ra_id_equals(raid, &ctx->ra)) |
| 182 | return ctx; |
| 183 | } |
| 184 | |
| 185 | return NULL; |
| 186 | } |
| 187 | |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 188 | 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] | 189 | { |
| 190 | struct sgsn_mm_ctx *ctx; |
| 191 | |
| 192 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 193 | if (p_tmsi == ctx->p_tmsi || |
| 194 | (ctx->p_tmsi_old && ctx->p_tmsi_old == p_tmsi)) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 195 | return ctx; |
| 196 | } |
| 197 | return NULL; |
| 198 | } |
| 199 | |
| 200 | struct sgsn_mm_ctx *sgsn_mm_ctx_by_imsi(const char *imsi) |
| 201 | { |
| 202 | struct sgsn_mm_ctx *ctx; |
| 203 | |
| 204 | llist_for_each_entry(ctx, &sgsn_mm_ctxts, list) { |
| 205 | if (!strcmp(imsi, ctx->imsi)) |
| 206 | return ctx; |
| 207 | } |
| 208 | return NULL; |
| 209 | |
| 210 | } |
| 211 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 212 | /* Allocate a new SGSN MM context, generic part */ |
| 213 | 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] | 214 | { |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 215 | struct sgsn_mm_ctx *ctx; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 216 | |
Pau Espin Pedrol | b1d1c24 | 2018-10-30 17:27:59 +0100 | [diff] [blame] | 217 | ctx = talloc_zero(tall_sgsn_ctx, struct sgsn_mm_ctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 218 | if (!ctx) |
| 219 | return NULL; |
| 220 | |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 221 | ctx->auth_triplet.key_seq = GSM_KEY_SEQ_INVAL; |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 222 | 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] | 223 | if (!ctx->ctrg) { |
| 224 | LOGMMCTXP(LOGL_ERROR, ctx, "Cannot allocate counter group\n"); |
| 225 | talloc_free(ctx); |
| 226 | return NULL; |
| 227 | } |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 228 | |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 229 | 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] | 230 | if (!ctx->gmm_fsm) |
| 231 | goto out; |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 232 | 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] | 233 | if (!ctx->gmm_att_req.fsm) |
| 234 | goto out; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 235 | 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] | 236 | if (!ctx->gb.mm_state_fsm) |
| 237 | goto out; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 238 | #ifdef BUILD_IU |
| 239 | 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] | 240 | if (!ctx->iu.mm_state_fsm) |
| 241 | goto out; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 242 | #endif |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 243 | |
Harald Welte | 6ffbaab | 2010-05-18 12:44:45 +0200 | [diff] [blame] | 244 | INIT_LLIST_HEAD(&ctx->pdp_list); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 245 | |
| 246 | llist_add(&ctx->list, &sgsn_mm_ctxts); |
| 247 | |
| 248 | return ctx; |
Alexander Couzens | 865bf6f | 2019-10-08 17:01:05 +0200 | [diff] [blame] | 249 | |
| 250 | out: |
| 251 | if (ctx->iu.mm_state_fsm) |
| 252 | osmo_fsm_inst_free(ctx->iu.mm_state_fsm); |
| 253 | if (ctx->gb.mm_state_fsm) |
| 254 | osmo_fsm_inst_free(ctx->gb.mm_state_fsm); |
| 255 | if (ctx->gmm_att_req.fsm) |
| 256 | osmo_fsm_inst_free(ctx->gmm_att_req.fsm); |
| 257 | if (ctx->gmm_fsm) |
| 258 | osmo_fsm_inst_free(ctx->gmm_fsm); |
| 259 | |
| 260 | rate_ctr_group_free(ctx->ctrg); |
| 261 | talloc_free(ctx); |
| 262 | |
| 263 | return NULL; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 264 | } |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 265 | /* Allocate a new SGSN MM context for GERAN_Gb */ |
| 266 | struct sgsn_mm_ctx *sgsn_mm_ctx_alloc_gb(uint32_t tlli, |
| 267 | const struct gprs_ra_id *raid) |
| 268 | { |
| 269 | struct sgsn_mm_ctx *ctx; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 270 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 271 | ctx = sgsn_mm_ctx_alloc(tlli); |
| 272 | if (!ctx) |
| 273 | return NULL; |
| 274 | |
| 275 | memcpy(&ctx->ra, raid, sizeof(ctx->ra)); |
| 276 | ctx->ran_type = MM_CTX_T_GERAN_Gb; |
| 277 | ctx->gb.tlli = tlli; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 278 | 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] | 279 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 280 | return ctx; |
| 281 | } |
| 282 | |
| 283 | /* Allocate a new SGSN MM context for UTRAN_Iu */ |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 284 | struct sgsn_mm_ctx *sgsn_mm_ctx_alloc_iu(void *uectx) |
| 285 | { |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 286 | #if BUILD_IU |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 287 | struct sgsn_mm_ctx *ctx; |
Max | 794693c | 2017-12-20 11:38:01 +0100 | [diff] [blame] | 288 | struct ranap_ue_conn_ctx *ue_ctx = uectx; |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 289 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 290 | ctx = sgsn_mm_ctx_alloc(ue_ctx->conn_id); |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 291 | if (!ctx) |
| 292 | return NULL; |
| 293 | |
Pau Espin Pedrol | 87264e6 | 2019-08-29 20:52:28 +0200 | [diff] [blame] | 294 | /* Need to get RAID from IU conn */ |
| 295 | ctx->ra = ue_ctx->ra_id; |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 296 | ctx->ran_type = MM_CTX_T_UTRAN_Iu; |
Max | 794693c | 2017-12-20 11:38:01 +0100 | [diff] [blame] | 297 | ctx->iu.ue_ctx = ue_ctx; |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 298 | 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] | 299 | ctx->iu.new_key = 1; |
Alexander Couzens | d597ee2 | 2019-09-17 17:42:11 +0200 | [diff] [blame] | 300 | 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] | 301 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 302 | |
| 303 | return ctx; |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 304 | #else |
| 305 | return NULL; |
| 306 | #endif |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | |
Harald Welte | 7b022ee | 2012-07-14 12:04:04 +0200 | [diff] [blame] | 310 | /* this is a hard _free_ function, it doesn't clean up the PDP contexts |
| 311 | * in libgtp! */ |
Holger Hans Peter Freyther | b448dd8 | 2015-05-03 11:46:58 +0200 | [diff] [blame] | 312 | static void sgsn_mm_ctx_free(struct sgsn_mm_ctx *mm) |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 313 | { |
| 314 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 315 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 316 | /* Unlink from global list of MM contexts */ |
| 317 | llist_del(&mm->list); |
| 318 | |
| 319 | /* Free all PDP contexts */ |
| 320 | llist_for_each_entry_safe(pdp, pdp2, &mm->pdp_list, list) |
| 321 | sgsn_pdp_ctx_free(pdp); |
| 322 | |
| 323 | rate_ctr_group_free(mm->ctrg); |
| 324 | |
| 325 | talloc_free(mm); |
| 326 | } |
| 327 | |
| 328 | void sgsn_mm_ctx_cleanup_free(struct sgsn_mm_ctx *mm) |
| 329 | { |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 330 | struct gprs_llc_llme *llme = NULL; |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 331 | struct sgsn_pdp_ctx *pdp, *pdp2; |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 332 | struct sgsn_signal_data sig_data; |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 333 | |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 334 | if (mm->ran_type == MM_CTX_T_GERAN_Gb) |
| 335 | llme = mm->gb.llme; |
| 336 | else |
| 337 | OSMO_ASSERT(mm->gb.llme == NULL); |
| 338 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 339 | /* Forget about ongoing look-ups */ |
| 340 | if (mm->ggsn_lookup) { |
| 341 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 342 | "Cleaning mmctx with on-going query.\n"); |
| 343 | mm->ggsn_lookup->mmctx = NULL; |
| 344 | mm->ggsn_lookup = NULL; |
| 345 | } |
| 346 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 347 | /* delete all existing PDP contexts for this MS */ |
| 348 | llist_for_each_entry_safe(pdp, pdp2, &mm->pdp_list, list) { |
| 349 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 350 | "Dropping PDP context for NSAPI=%u\n", pdp->nsapi); |
| 351 | sgsn_pdp_ctx_terminate(pdp); |
| 352 | } |
| 353 | |
Jacob Erlbeck | ae20b4b | 2014-10-20 16:05:55 +0200 | [diff] [blame] | 354 | if (osmo_timer_pending(&mm->timer)) { |
| 355 | LOGMMCTXP(LOGL_INFO, mm, "Cancelling MM timer %u\n", mm->T); |
| 356 | osmo_timer_del(&mm->timer); |
| 357 | } |
| 358 | |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 359 | memset(&sig_data, 0, sizeof(sig_data)); |
| 360 | sig_data.mm = mm; |
| 361 | osmo_signal_dispatch(SS_SGSN, S_SGSN_MM_FREE, &sig_data); |
| 362 | |
| 363 | |
Jacob Erlbeck | be2c8d9 | 2014-11-12 10:18:09 +0100 | [diff] [blame] | 364 | /* Detach from subscriber which is possibly freed then */ |
| 365 | if (mm->subscr) { |
Neels Hofmeyr | 0e5d807 | 2017-01-10 00:49:56 +0100 | [diff] [blame] | 366 | struct gprs_subscr *subscr = gprs_subscr_get(mm->subscr); |
Jacob Erlbeck | 3e4e58f | 2015-01-26 11:07:24 +0100 | [diff] [blame] | 367 | gprs_subscr_cleanup(subscr); |
Neels Hofmeyr | 0e5d807 | 2017-01-10 00:49:56 +0100 | [diff] [blame] | 368 | gprs_subscr_put(subscr); |
Jacob Erlbeck | be2c8d9 | 2014-11-12 10:18:09 +0100 | [diff] [blame] | 369 | } |
| 370 | |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 371 | if (mm->gmm_att_req.fsm) |
| 372 | gmm_att_req_free(mm); |
Pau Espin Pedrol | 02514bc | 2019-08-30 16:14:22 +0200 | [diff] [blame] | 373 | if (mm->gb.mm_state_fsm) |
| 374 | osmo_fsm_inst_free(mm->gb.mm_state_fsm); |
Pau Espin Pedrol | ccd1252 | 2019-08-30 17:06:36 +0200 | [diff] [blame] | 375 | if (mm->iu.mm_state_fsm) |
| 376 | osmo_fsm_inst_free(mm->iu.mm_state_fsm); |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 377 | if (mm->gmm_fsm) |
| 378 | osmo_fsm_inst_free(mm->gmm_fsm); |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 379 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 380 | sgsn_mm_ctx_free(mm); |
| 381 | mm = NULL; |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 382 | |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 383 | if (llme) { |
| 384 | /* TLLI unassignment, must be called after sgsn_mm_ctx_free */ |
Pau Espin Pedrol | 788863c | 2019-08-12 18:31:22 +0200 | [diff] [blame] | 385 | if (gprs_llgmm_unassign(llme) < 0) |
| 386 | LOGMMCTXP(LOGL_ERROR, mm, "gprs_llgmm_unassign failed, llme not freed!\n"); |
Daniel Willmann | 7ec8ca4 | 2016-05-21 00:48:49 +0200 | [diff] [blame] | 387 | } |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 388 | } |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 389 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 390 | |
Harald Welte | 96df606 | 2010-06-03 06:37:26 +0200 | [diff] [blame] | 391 | /* look up PDP context by MM context and NSAPI */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 392 | struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_nsapi(const struct sgsn_mm_ctx *mm, |
| 393 | uint8_t nsapi) |
| 394 | { |
| 395 | struct sgsn_pdp_ctx *pdp; |
| 396 | |
| 397 | llist_for_each_entry(pdp, &mm->pdp_list, list) { |
| 398 | if (pdp->nsapi == nsapi) |
| 399 | return pdp; |
| 400 | } |
| 401 | return NULL; |
| 402 | } |
| 403 | |
Harald Welte | 96df606 | 2010-06-03 06:37:26 +0200 | [diff] [blame] | 404 | /* look up PDP context by MM context and transaction ID */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 405 | struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tid(const struct sgsn_mm_ctx *mm, |
| 406 | uint8_t tid) |
| 407 | { |
| 408 | struct sgsn_pdp_ctx *pdp; |
| 409 | |
| 410 | llist_for_each_entry(pdp, &mm->pdp_list, list) { |
| 411 | if (pdp->ti == tid) |
| 412 | return pdp; |
| 413 | } |
| 414 | return NULL; |
| 415 | } |
| 416 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 417 | uint32_t sgsn_alloc_ptmsi(void) |
| 418 | { |
| 419 | struct sgsn_mm_ctx *mm; |
Alexander Couzens | 8a215c3 | 2017-02-03 23:22:18 +0100 | [diff] [blame] | 420 | uint32_t ptmsi = 0xdeadbeef; |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 421 | int max_retries = 100, rc = 0; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 422 | |
| 423 | restart: |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 424 | rc = osmo_get_rand_id((uint8_t *) &ptmsi, sizeof(ptmsi)); |
| 425 | if (rc < 0) |
Daniel Willmann | 044ce5f | 2015-10-12 19:36:33 +0200 | [diff] [blame] | 426 | goto failed; |
| 427 | |
Jacob Erlbeck | d8a6553 | 2015-01-15 18:51:31 +0100 | [diff] [blame] | 428 | /* Enforce that the 2 MSB are set without loosing the distance between |
| 429 | * identical values. Since rand() has no duplicate values within a |
| 430 | * period (because the size of the state is the same like the size of |
| 431 | * the random value), this leads to a distance of period/4 when the |
| 432 | * distribution of the 2 MSB is uniform. This approach fails with a |
| 433 | * probability of (3/4)^max_retries, only 1% of the approaches will |
| 434 | * need more than 16 numbers (even distribution assumed). |
| 435 | * |
| 436 | * Alternatively, a freeze list could be used if another PRNG is used |
| 437 | * or when this approach proves to be not sufficient. |
| 438 | */ |
Eric Wild | df9b391 | 2019-06-17 12:13:28 +0200 | [diff] [blame] | 439 | if (ptmsi >= GSM23003_TMSI_SGSN_MASK) { |
Jacob Erlbeck | d8a6553 | 2015-01-15 18:51:31 +0100 | [diff] [blame] | 440 | if (!max_retries--) |
| 441 | goto failed; |
| 442 | goto restart; |
| 443 | } |
Eric Wild | df9b391 | 2019-06-17 12:13:28 +0200 | [diff] [blame] | 444 | ptmsi |= GSM23003_TMSI_SGSN_MASK; |
Jacob Erlbeck | d8a6553 | 2015-01-15 18:51:31 +0100 | [diff] [blame] | 445 | |
| 446 | if (ptmsi == GSM_RESERVED_TMSI) { |
| 447 | if (!max_retries--) |
| 448 | goto failed; |
| 449 | goto restart; |
| 450 | } |
| 451 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 452 | llist_for_each_entry(mm, &sgsn_mm_ctxts, list) { |
Jacob Erlbeck | 08fbeb8 | 2014-09-19 09:28:42 +0200 | [diff] [blame] | 453 | if (mm->p_tmsi == ptmsi) { |
| 454 | if (!max_retries--) |
| 455 | goto failed; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 456 | goto restart; |
Jacob Erlbeck | 08fbeb8 | 2014-09-19 09:28:42 +0200 | [diff] [blame] | 457 | } |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | return ptmsi; |
Jacob Erlbeck | 08fbeb8 | 2014-09-19 09:28:42 +0200 | [diff] [blame] | 461 | |
| 462 | failed: |
Max | 3b6332f | 2017-11-01 13:28:38 +0100 | [diff] [blame] | 463 | 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] | 464 | return GSM_RESERVED_TMSI; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 465 | } |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 466 | |
Jacob Erlbeck | 555b2e5 | 2015-01-26 13:52:42 +0100 | [diff] [blame] | 467 | void sgsn_update_subscriber_data(struct sgsn_mm_ctx *mmctx) |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 468 | { |
Jacob Erlbeck | 555b2e5 | 2015-01-26 13:52:42 +0100 | [diff] [blame] | 469 | OSMO_ASSERT(mmctx != NULL); |
Jacob Erlbeck | c939196 | 2014-12-18 09:53:07 +0100 | [diff] [blame] | 470 | LOGMMCTXP(LOGL_INFO, mmctx, "Subscriber data update\n"); |
Jacob Erlbeck | be2c8d9 | 2014-11-12 10:18:09 +0100 | [diff] [blame] | 471 | |
Jacob Erlbeck | a0b6efb | 2014-11-13 10:48:39 +0100 | [diff] [blame] | 472 | sgsn_auth_update(mmctx); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 473 | } |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 474 | |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 475 | static void insert_extra(struct tlv_parsed *tp, |
| 476 | struct sgsn_subscriber_data *data, |
| 477 | struct sgsn_subscriber_pdp_data *pdp) |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 478 | { |
| 479 | tp->lv[OSMO_IE_GSM_SUB_QOS].len = pdp->qos_subscribed_len; |
| 480 | 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] | 481 | |
| 482 | /* Prefer PDP charging characteristics of per subscriber one */ |
| 483 | if (pdp->has_pdp_charg) { |
| 484 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].len = sizeof(pdp->pdp_charg); |
| 485 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].val = &pdp->pdp_charg[0]; |
| 486 | } else if (data->has_pdp_charg) { |
| 487 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].len = sizeof(data->pdp_charg); |
| 488 | tp->lv[OSMO_IE_GSM_CHARG_CHAR].val = &data->pdp_charg[0]; |
| 489 | } |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | /** |
| 493 | * The tlv_parsed tp parameter will be modified to insert a |
| 494 | * OSMO_IE_GSM_SUB_QOS in case the data is available in the |
| 495 | * PDP context handling. |
| 496 | */ |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 497 | struct sgsn_ggsn_ctx *sgsn_mm_ctx_find_ggsn_ctx(struct sgsn_mm_ctx *mmctx, |
| 498 | struct tlv_parsed *tp, |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 499 | enum gsm48_gsm_cause *gsm_cause, |
| 500 | char *out_apn_str) |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 501 | { |
| 502 | char req_apn_str[GSM_APN_LENGTH] = {0}; |
| 503 | const struct apn_ctx *apn_ctx = NULL; |
| 504 | const char *selected_apn_str = NULL; |
| 505 | struct sgsn_subscriber_pdp_data *pdp; |
| 506 | struct sgsn_ggsn_ctx *ggsn = NULL; |
| 507 | int allow_any_apn = 0; |
| 508 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 509 | out_apn_str[0] = '\0'; |
| 510 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 511 | if (TLVP_PRESENT(tp, GSM48_IE_GSM_APN)) { |
| 512 | if (TLVP_LEN(tp, GSM48_IE_GSM_APN) >= GSM_APN_LENGTH - 1) { |
| 513 | LOGMMCTXP(LOGL_ERROR, mmctx, "APN IE too long\n"); |
| 514 | *gsm_cause = GSM_CAUSE_INV_MAND_INFO; |
| 515 | return NULL; |
| 516 | } |
| 517 | |
Harald Welte | 7e82b74 | 2017-08-12 13:43:54 +0200 | [diff] [blame] | 518 | osmo_apn_to_str(req_apn_str, |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 519 | TLVP_VAL(tp, GSM48_IE_GSM_APN), |
| 520 | TLVP_LEN(tp, GSM48_IE_GSM_APN)); |
| 521 | |
| 522 | if (strcmp(req_apn_str, "*") == 0) |
| 523 | req_apn_str[0] = 0; |
| 524 | } |
| 525 | |
Holger Hans Peter Freyther | 9270d99 | 2015-05-24 20:51:17 +0800 | [diff] [blame] | 526 | if (mmctx->subscr == NULL) |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 527 | allow_any_apn = 1; |
| 528 | |
| 529 | if (strlen(req_apn_str) == 0 && !allow_any_apn) { |
| 530 | /* No specific APN requested, check for an APN that is both |
| 531 | * granted and configured */ |
| 532 | |
| 533 | llist_for_each_entry(pdp, &mmctx->subscr->sgsn_data->pdp_list, list) { |
| 534 | if (strcmp(pdp->apn_str, "*") == 0) |
| 535 | { |
| 536 | allow_any_apn = 1; |
| 537 | selected_apn_str = ""; |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 538 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 539 | continue; |
| 540 | } |
Pau Espin Pedrol | fd4d435 | 2023-01-05 19:37:05 +0100 | [diff] [blame] | 541 | if (!llist_empty(&sgsn->apn_list)) { |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 542 | apn_ctx = sgsn_apn_ctx_match(req_apn_str, mmctx->imsi); |
| 543 | /* Not configured */ |
| 544 | if (apn_ctx == NULL) |
| 545 | continue; |
| 546 | } |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 547 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 548 | selected_apn_str = pdp->apn_str; |
| 549 | break; |
| 550 | } |
| 551 | } else if (!allow_any_apn) { |
| 552 | /* Check whether the given APN is granted */ |
| 553 | llist_for_each_entry(pdp, &mmctx->subscr->sgsn_data->pdp_list, list) { |
| 554 | if (strcmp(pdp->apn_str, "*") == 0) { |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 555 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 556 | selected_apn_str = req_apn_str; |
| 557 | allow_any_apn = 1; |
| 558 | continue; |
| 559 | } |
| 560 | if (strcasecmp(pdp->apn_str, req_apn_str) == 0) { |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 561 | insert_extra(tp, mmctx->subscr->sgsn_data, pdp); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 562 | selected_apn_str = req_apn_str; |
| 563 | break; |
| 564 | } |
| 565 | } |
| 566 | } else if (strlen(req_apn_str) != 0) { |
| 567 | /* Any APN is allowed */ |
| 568 | selected_apn_str = req_apn_str; |
| 569 | } else { |
| 570 | /* Prefer the GGSN associated with the wildcard APN */ |
| 571 | selected_apn_str = ""; |
| 572 | } |
| 573 | |
| 574 | if (!allow_any_apn && selected_apn_str == NULL) { |
| 575 | /* Access not granted */ |
| 576 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 577 | "The requested APN '%s' is not allowed\n", |
| 578 | req_apn_str); |
| 579 | *gsm_cause = GSM_CAUSE_REQ_SERV_OPT_NOTSUB; |
| 580 | return NULL; |
| 581 | } |
| 582 | |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 583 | /* copy the selected apn_str */ |
Holger Hans Peter Freyther | f2e114a | 2015-06-02 09:33:31 +0200 | [diff] [blame] | 584 | if (selected_apn_str) |
| 585 | strcpy(out_apn_str, selected_apn_str); |
| 586 | else |
| 587 | out_apn_str[0] = '\0'; |
Holger Hans Peter Freyther | 39c430e | 2015-05-25 12:26:49 +0800 | [diff] [blame] | 588 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 589 | if (apn_ctx == NULL && selected_apn_str) |
| 590 | apn_ctx = sgsn_apn_ctx_match(selected_apn_str, mmctx->imsi); |
| 591 | |
| 592 | if (apn_ctx != NULL) { |
| 593 | ggsn = apn_ctx->ggsn; |
Pau Espin Pedrol | fd4d435 | 2023-01-05 19:37:05 +0100 | [diff] [blame] | 594 | } else if (llist_empty(&sgsn->apn_list)) { |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 595 | /* No configuration -> use GGSN 0 */ |
Pau Espin Pedrol | 6956987 | 2023-01-05 19:39:01 +0100 | [diff] [blame] | 596 | ggsn = sgsn_ggsn_ctx_by_id(sgsn, 0); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 597 | } else if (allow_any_apn && |
| 598 | (selected_apn_str == NULL || strlen(selected_apn_str) == 0)) { |
| 599 | /* No APN given and no default configuration -> Use GGSN 0 */ |
Pau Espin Pedrol | 6956987 | 2023-01-05 19:39:01 +0100 | [diff] [blame] | 600 | ggsn = sgsn_ggsn_ctx_by_id(sgsn, 0); |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 601 | } else { |
| 602 | /* No matching configuration found */ |
| 603 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 604 | "The selected APN '%s' has not been configured\n", |
| 605 | selected_apn_str); |
| 606 | *gsm_cause = GSM_CAUSE_MISSING_APN; |
| 607 | return NULL; |
| 608 | } |
| 609 | |
Holger Hans Peter Freyther | 08bb84b | 2015-05-25 14:35:10 +0800 | [diff] [blame] | 610 | if (!ggsn) { |
| 611 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 612 | "No static GGSN configured. Selected APN '%s'\n", |
| 613 | selected_apn_str); |
Vadim Yanitskiy | 4b8e309 | 2019-07-18 15:04:46 +0700 | [diff] [blame] | 614 | *gsm_cause = GSM_CAUSE_MISSING_APN; |
| 615 | return NULL; |
Holger Hans Peter Freyther | 08bb84b | 2015-05-25 14:35:10 +0800 | [diff] [blame] | 616 | } |
| 617 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 618 | LOGMMCTXP(LOGL_INFO, mmctx, |
| 619 | "Found GGSN %d for APN '%s' (requested '%s')\n", |
| 620 | ggsn->id, selected_apn_str ? selected_apn_str : "---", |
| 621 | req_apn_str); |
| 622 | |
| 623 | return ggsn; |
| 624 | } |
| 625 | |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 626 | static void sgsn_llme_cleanup_free(struct gprs_llc_llme *llme) |
| 627 | { |
| 628 | struct sgsn_mm_ctx *mmctx = NULL; |
| 629 | |
| 630 | llist_for_each_entry(mmctx, &sgsn_mm_ctxts, list) { |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 631 | if (llme == mmctx->gb.llme) { |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 632 | gsm0408_gprs_access_cancelled(mmctx, SGSN_ERROR_CAUSE_NONE); |
| 633 | return; |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | /* No MM context found */ |
| 638 | LOGP(DGPRS, LOGL_INFO, "Deleting orphaned LLME, TLLI 0x%08x\n", |
| 639 | llme->tlli); |
Max | 3955025 | 2016-06-28 17:39:20 +0200 | [diff] [blame] | 640 | gprs_llgmm_unassign(llme); |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 641 | } |
| 642 | |
| 643 | static void sgsn_llme_check_cb(void *data_) |
| 644 | { |
| 645 | struct gprs_llc_llme *llme, *llme_tmp; |
| 646 | struct timespec now_tp; |
| 647 | time_t now, age; |
| 648 | time_t max_age = gprs_max_time_to_idle(); |
| 649 | |
| 650 | int rc; |
| 651 | |
Pau Espin Pedrol | 36abead | 2018-08-17 13:27:20 +0200 | [diff] [blame] | 652 | rc = osmo_clock_gettime(CLOCK_MONOTONIC, &now_tp); |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 653 | OSMO_ASSERT(rc >= 0); |
| 654 | now = now_tp.tv_sec; |
| 655 | |
| 656 | LOGP(DGPRS, LOGL_DEBUG, |
| 657 | "Checking for inactive LLMEs, time = %u\n", (unsigned)now); |
| 658 | |
| 659 | llist_for_each_entry_safe(llme, llme_tmp, &gprs_llc_llmes, list) { |
| 660 | if (llme->age_timestamp == GPRS_LLME_RESET_AGE) |
| 661 | llme->age_timestamp = now; |
| 662 | |
| 663 | age = now - llme->age_timestamp; |
| 664 | |
| 665 | if (age > max_age || age < 0) { |
| 666 | LOGP(DGPRS, LOGL_INFO, |
| 667 | "Inactivity timeout for TLLI 0x%08x, age %d\n", |
| 668 | llme->tlli, (int)age); |
| 669 | sgsn_llme_cleanup_free(llme); |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | osmo_timer_schedule(&sgsn->llme_timer, GPRS_LLME_CHECK_TICK, 0); |
| 674 | } |
| 675 | |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 676 | static int sgsn_instance_talloc_destructor(struct sgsn_instance *sgi) |
| 677 | { |
| 678 | sgsn_cdr_release(sgi); |
| 679 | osmo_timer_del(&sgi->llme_timer); |
| 680 | rate_ctr_group_free(sgi->rate_ctrs); |
| 681 | return 0; |
| 682 | } |
| 683 | |
Pau Espin Pedrol | 73b2bf3 | 2018-10-30 18:00:57 +0100 | [diff] [blame] | 684 | struct sgsn_instance *sgsn_instance_alloc(void *talloc_ctx) |
| 685 | { |
| 686 | struct sgsn_instance *inst; |
| 687 | inst = talloc_zero(talloc_ctx, struct sgsn_instance); |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 688 | |
| 689 | talloc_set_destructor(inst, sgsn_instance_talloc_destructor); |
| 690 | |
Pau Espin Pedrol | 73b2bf3 | 2018-10-30 18:00:57 +0100 | [diff] [blame] | 691 | inst->cfg.gtp_statedir = talloc_strdup(inst, "./"); |
| 692 | inst->cfg.auth_policy = SGSN_AUTH_POLICY_CLOSED; |
Pau Espin Pedrol | d1463bc | 2019-06-13 19:03:25 +0200 | [diff] [blame] | 693 | inst->cfg.require_authentication = true; /* only applies if auth_policy is REMOTE */ |
Pau Espin Pedrol | 73b2bf3 | 2018-10-30 18:00:57 +0100 | [diff] [blame] | 694 | inst->cfg.gsup_server_port = OSMO_GSUP_PORT; |
Pau Espin Pedrol | e5c8998 | 2021-05-03 18:16:42 +0200 | [diff] [blame] | 695 | |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 696 | inst->cfg.T_defs = sgsn_T_defs; |
| 697 | osmo_tdefs_reset(inst->cfg.T_defs); |
| 698 | inst->cfg.T_defs_gtp = gtp_T_defs; |
| 699 | osmo_tdefs_reset(inst->cfg.T_defs_gtp); |
| 700 | |
| 701 | inst->rate_ctrs = rate_ctr_group_alloc(inst, &sgsn_ctrg_desc, 0); |
| 702 | OSMO_ASSERT(inst->rate_ctrs); |
| 703 | |
Pau Espin Pedrol | fd4d435 | 2023-01-05 19:37:05 +0100 | [diff] [blame] | 704 | INIT_LLIST_HEAD(&inst->apn_list); |
Pau Espin Pedrol | 44bde6b | 2023-01-05 17:23:26 +0100 | [diff] [blame] | 705 | INIT_LLIST_HEAD(&inst->ggsn_list); |
Pau Espin Pedrol | e5c8998 | 2021-05-03 18:16:42 +0200 | [diff] [blame] | 706 | INIT_LLIST_HEAD(&inst->mme_list); |
Pau Espin Pedrol | 15a52d9 | 2023-01-05 20:26:31 +0100 | [diff] [blame] | 707 | INIT_LLIST_HEAD(&inst->pdp_list); |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 708 | |
| 709 | osmo_timer_setup(&inst->llme_timer, sgsn_llme_check_cb, NULL); |
| 710 | osmo_timer_schedule(&inst->llme_timer, GPRS_LLME_CHECK_TICK, 0); |
| 711 | /* These are mostly setting up stuff not related to VTY cfg, so they can be set up here: */ |
| 712 | sgsn_auth_init(inst); |
| 713 | sgsn_cdr_init(inst); |
Pau Espin Pedrol | 73b2bf3 | 2018-10-30 18:00:57 +0100 | [diff] [blame] | 714 | return inst; |
| 715 | } |
| 716 | |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 717 | /* To be called after VTY config parsing: */ |
| 718 | int sgsn_inst_init(struct sgsn_instance *sgsn) |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 719 | { |
Pau Espin Pedrol | e659f75 | 2023-01-05 17:20:37 +0100 | [diff] [blame] | 720 | int rc; |
| 721 | |
| 722 | /* start control interface after reading config for |
| 723 | * ctrl_vty_get_bind_addr() */ |
| 724 | sgsn->ctrlh = ctrl_interface_setup(NULL, OSMO_CTRL_PORT_SGSN, NULL); |
| 725 | if (!sgsn->ctrlh) { |
| 726 | LOGP(DGPRS, LOGL_ERROR, "Failed to create CTRL interface.\n"); |
| 727 | return -EIO; |
| 728 | } |
| 729 | |
| 730 | rc = sgsn_ctrl_cmds_install(); |
| 731 | if (rc != 0) { |
| 732 | LOGP(DGPRS, LOGL_ERROR, "Failed to install CTRL commands.\n"); |
| 733 | return -EFAULT; |
| 734 | } |
| 735 | |
| 736 | rc = gprs_subscr_init(sgsn); |
| 737 | if (rc < 0) { |
| 738 | LOGP(DGPRS, LOGL_FATAL, "Cannot set up SGSN\n"); |
| 739 | return rc; |
| 740 | } |
| 741 | return 0; |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 742 | } |