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 | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 4 | /* (C) 2009-2010 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> |
| 29 | |
| 30 | #include <netinet/in.h> |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 32 | |
| 33 | #include <openbsc/db.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 34 | #include <osmocom/core/msgb.h> |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 35 | #include <osmocom/gsm/tlv.h> |
| 36 | #include <osmocom/gsm/gsm_utils.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 37 | #include <osmocom/core/signal.h> |
| 38 | #include <osmocom/core/talloc.h> |
| 39 | #include <osmocom/core/rate_ctr.h> |
Harald Welte | d605709 | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 40 | |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 41 | #include <osmocom/gprs/gprs_bssgp.h> |
| 42 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 43 | #include <openbsc/debug.h> |
| 44 | #include <openbsc/gsm_data.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 45 | #include <openbsc/gsm_subscriber.h> |
| 46 | #include <openbsc/gsm_04_08.h> |
| 47 | #include <openbsc/gsm_04_08_gprs.h> |
| 48 | #include <openbsc/paging.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 49 | #include <openbsc/transaction.h> |
| 50 | #include <openbsc/gprs_llc.h> |
| 51 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 52 | #include <openbsc/gprs_gmm.h> |
Jacob Erlbeck | 8de9c48 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 53 | #include <openbsc/gprs_utils.h> |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 54 | #include <openbsc/sgsn.h> |
| 55 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 56 | #include <pdp.h> |
| 57 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 58 | #define PTMSI_ALLOC |
| 59 | |
Jacob Erlbeck | 841d95f | 2015-01-23 12:32:38 +0100 | [diff] [blame] | 60 | /* Section 11.2.2 / Table 11.3a GPRS Mobility management timers – MS side */ |
| 61 | #define GSM0408_T3312_SECS (10*60) /* periodic RAU interval, default 54min */ |
| 62 | |
Harald Welte | 649e1ff | 2013-07-21 17:41:46 +0800 | [diff] [blame] | 63 | /* Section 11.2.2 / Table 11.4 MM timers netwokr side */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 64 | #define GSM0408_T3322_SECS 6 /* DETACH_REQ -> DETACH_ACC */ |
| 65 | #define GSM0408_T3350_SECS 6 /* waiting for ATT/RAU/TMSI COMPL */ |
| 66 | #define GSM0408_T3360_SECS 6 /* waiting for AUTH/CIPH RESP */ |
| 67 | #define GSM0408_T3370_SECS 6 /* waiting for ID RESP */ |
| 68 | |
Harald Welte | 649e1ff | 2013-07-21 17:41:46 +0800 | [diff] [blame] | 69 | /* Section 11.2.2 / Table 11.4a MM timers netwokr side */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 70 | #define GSM0408_T3313_SECS 30 /* waiting for paging response */ |
Jacob Erlbeck | 8de9c48 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 71 | #define GSM0408_T3314_SECS 44 /* force to STBY on expiry, Ready timer */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 72 | #define GSM0408_T3316_SECS 44 |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 73 | #define GSM0408_MOBILE_REACHABLE_SECS (GSM0408_T3312_SECS + 4 * 60) |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 74 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 75 | /* Section 11.3 / Table 11.2d Timers of Session Management - network side */ |
| 76 | #define GSM0408_T3385_SECS 8 /* wait for ACT PDP CTX REQ */ |
| 77 | #define GSM0408_T3386_SECS 8 /* wait for MODIFY PDP CTX ACK */ |
| 78 | #define GSM0408_T3395_SECS 8 /* wait for DEACT PDP CTX ACK */ |
| 79 | #define GSM0408_T3397_SECS 8 /* wait for DEACT AA PDP CTX ACK */ |
| 80 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 81 | extern struct sgsn_instance *sgsn; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 82 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 83 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 84 | .def = { |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 85 | [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 86 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 87 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 88 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_FIXED, 3 }, |
| 89 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_FIXED, 16 }, |
| 90 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 91 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 92 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 93 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 94 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 95 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 96 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 97 | }, |
| 98 | }; |
| 99 | |
| 100 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 101 | .def = { |
| 102 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 103 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 104 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 105 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 106 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 107 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 108 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, |
| 109 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 110 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 111 | }, |
| 112 | }; |
| 113 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 114 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx); |
| 115 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 116 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 117 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 118 | static void mmctx_timer_cb(void *_mm); |
| 119 | |
| 120 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 121 | unsigned int seconds) |
| 122 | { |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 123 | if (osmo_timer_pending(&mm->timer)) |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 124 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 125 | "timer %u pending\n", T, mm->T); |
| 126 | mm->T = T; |
| 127 | mm->num_T_exp = 0; |
| 128 | |
| 129 | /* FIXME: we should do this only once ? */ |
| 130 | mm->timer.data = mm; |
| 131 | mm->timer.cb = &mmctx_timer_cb; |
| 132 | |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 133 | osmo_timer_schedule(&mm->timer, seconds, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 137 | { |
| 138 | if (mm->T != T) |
| 139 | LOGP(DMM, LOGL_ERROR, "Stopping MM timer %u but " |
| 140 | "%u is running\n", T, mm->T); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 141 | osmo_timer_del(&mm->timer); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 142 | } |
| 143 | |
Jacob Erlbeck | 81ffb74 | 2015-01-23 11:33:51 +0100 | [diff] [blame] | 144 | time_t gprs_max_time_to_idle(void) |
| 145 | { |
| 146 | return GSM0408_T3314_SECS + GSM0408_MOBILE_REACHABLE_SECS; |
| 147 | } |
| 148 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 149 | /* Send a message through the underlying layer */ |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 150 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 151 | struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 152 | { |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 153 | if (mm) |
| 154 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
| 155 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 156 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 157 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 158 | } |
| 159 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 160 | /* copy identifiers from old message to new message, this |
| 161 | * is required so lower layers can route it correctly */ |
| 162 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 163 | { |
| 164 | msgb_tlli(msg) = msgb_tlli(old); |
| 165 | msgb_bvci(msg) = msgb_bvci(old); |
| 166 | msgb_nsei(msg) = msgb_nsei(old); |
| 167 | } |
| 168 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 169 | /* Store BVCI/NSEI in MM context */ |
| 170 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 171 | { |
| 172 | mm->bvci = msgb_bvci(msg); |
| 173 | mm->nsei = msgb_nsei(msg); |
| 174 | } |
| 175 | |
| 176 | /* Store BVCI/NSEI in MM context */ |
| 177 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 178 | { |
| 179 | msgb_tlli(msg) = mm->tlli; |
| 180 | msgb_bvci(msg) = mm->bvci; |
| 181 | msgb_nsei(msg) = mm->nsei; |
| 182 | } |
| 183 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 184 | static void mm_ctx_cleanup_free(struct sgsn_mm_ctx *ctx, const char *log_text) |
| 185 | { |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 186 | 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] | 187 | |
| 188 | /* Mark MM state as deregistered */ |
| 189 | ctx->mm_state = GMM_DEREGISTERED; |
| 190 | |
Jacob Erlbeck | e671d25 | 2015-01-26 14:43:07 +0100 | [diff] [blame] | 191 | sgsn_mm_ctx_cleanup_free(ctx); |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 192 | } |
| 193 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 194 | /* Chapter 9.4.18 */ |
| 195 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 196 | struct sgsn_mm_ctx *mmctx, int sm) |
| 197 | { |
| 198 | struct gsm48_hdr *gh; |
| 199 | |
| 200 | /* MMCTX might be NULL! */ |
| 201 | |
| 202 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 203 | get_value_string(gsm48_gmm_cause_names, cause)); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 204 | |
| 205 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 206 | if (sm) { |
| 207 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 208 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 209 | } else { |
| 210 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 211 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 212 | } |
| 213 | gh->data[0] = cause; |
| 214 | |
| 215 | return gsm48_gmm_sendmsg(msg, 0, mmctx); |
| 216 | } |
Jacob Erlbeck | 7067142 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 217 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 218 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 219 | { |
| 220 | struct msgb *msg = gsm48_msgb_alloc(); |
| 221 | |
| 222 | mmctx2msgid(msg, mmctx); |
| 223 | return _tx_status(msg, cause, mmctx, 0); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 224 | } |
Jacob Erlbeck | 7067142 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 225 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 226 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 227 | { |
| 228 | struct msgb *msg = gsm48_msgb_alloc(); |
| 229 | |
| 230 | mmctx2msgid(msg, mmctx); |
| 231 | return _tx_status(msg, cause, mmctx, 1); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 232 | } |
| 233 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 234 | static int _tx_detach_req(struct msgb *msg, uint8_t detach_type, uint8_t cause, |
| 235 | struct sgsn_mm_ctx *mmctx) |
| 236 | { |
| 237 | struct gsm48_hdr *gh; |
| 238 | |
| 239 | /* MMCTX might be NULL! */ |
| 240 | |
| 241 | DEBUGP(DMM, "<- GPRS MM DETACH REQ (type: %s, cause: %s)\n", |
| 242 | get_value_string(gprs_det_t_mt_strs, detach_type), |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 243 | get_value_string(gsm48_gmm_cause_names, cause)); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 244 | |
| 245 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 246 | |
| 247 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 248 | gh->msg_type = GSM48_MT_GMM_DETACH_REQ; |
| 249 | gh->data[0] = detach_type & 0x07; |
| 250 | |
| 251 | msgb_tv_put(msg, GSM48_IE_GMM_CAUSE, cause); |
| 252 | |
| 253 | return gsm48_gmm_sendmsg(msg, 0, mmctx); |
| 254 | } |
| 255 | |
| 256 | static int gsm48_tx_gmm_detach_req(struct sgsn_mm_ctx *mmctx, |
| 257 | uint8_t detach_type, uint8_t cause) |
| 258 | { |
| 259 | struct msgb *msg = gsm48_msgb_alloc(); |
| 260 | |
| 261 | mmctx2msgid(msg, mmctx); |
| 262 | return _tx_detach_req(msg, detach_type, cause, mmctx); |
| 263 | } |
| 264 | |
| 265 | static int gsm48_tx_gmm_detach_req_oldmsg(struct msgb *oldmsg, |
| 266 | uint8_t detach_type, uint8_t cause) |
| 267 | { |
| 268 | struct msgb *msg = gsm48_msgb_alloc(); |
| 269 | |
| 270 | gmm_copy_id(msg, oldmsg); |
| 271 | return _tx_detach_req(msg, detach_type, cause, NULL); |
| 272 | } |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 273 | |
Harald Welte | 86fda90 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 274 | static struct gsm48_qos default_qos = { |
| 275 | .delay_class = 4, /* best effort */ |
| 276 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 277 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 278 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 279 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 280 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 281 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 282 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 283 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 284 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 285 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 286 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 287 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 288 | .handling_prio = 3, |
| 289 | .xfer_delay = 0x10, /* 200ms */ |
| 290 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 291 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 292 | .sig_ind = 0, /* not optimised for signalling */ |
| 293 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 294 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 295 | }; |
| 296 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 297 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 298 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 299 | { |
| 300 | struct msgb *msg = gsm48_msgb_alloc(); |
| 301 | struct gsm48_hdr *gh; |
| 302 | struct gsm48_attach_ack *aa; |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 303 | uint8_t *mid; |
| 304 | #if 0 |
| 305 | uint8_t *ptsig; |
| 306 | #endif |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 307 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 308 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 309 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 310 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 311 | |
| 312 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 313 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 314 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 315 | |
| 316 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 317 | aa->force_stby = 0; /* not indicated */ |
| 318 | aa->att_result = 1; /* GPRS only */ |
Jacob Erlbeck | 841d95f | 2015-01-23 12:32:38 +0100 | [diff] [blame] | 319 | aa->ra_upd_timer = gprs_secs_to_tmr_floor(GSM0408_T3312_SECS); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 320 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 321 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 322 | |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 323 | #if 0 |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 324 | /* Optional: P-TMSI signature */ |
| 325 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 326 | ptsig = msgb_put(msg, 3); |
| 327 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 328 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 329 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 330 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 331 | #endif |
Jacob Erlbeck | 8de9c48 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 332 | /* Optional: Negotiated Ready timer value |
| 333 | * (fixed 44s, default value, GSM 04.08, table 11.4a) to safely limit |
| 334 | * the inactivity time READY->STANDBY. |
| 335 | */ |
| 336 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
| 337 | gprs_secs_to_tmr_floor(GSM0408_T3314_SECS)); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 338 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 339 | #ifdef PTMSI_ALLOC |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 340 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 341 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 342 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 343 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 344 | #endif |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 345 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 346 | /* Optional: MS-identity (combined attach) */ |
| 347 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 348 | |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 349 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 353 | static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 354 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 355 | struct gsm48_hdr *gh; |
| 356 | |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 357 | LOGP(DMM, LOGL_NOTICE, "<- GPRS ATTACH REJECT: %s\n", get_value_string(gsm48_gmm_cause_names, gmm_cause)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 358 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 359 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 360 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 361 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 362 | gh->data[0] = gmm_cause; |
| 363 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 364 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 365 | } |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 366 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 367 | uint8_t gmm_cause) |
| 368 | { |
| 369 | struct msgb *msg = gsm48_msgb_alloc(); |
| 370 | gmm_copy_id(msg, old_msg); |
| 371 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 372 | } |
| 373 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 374 | uint8_t gmm_cause) |
| 375 | { |
| 376 | struct msgb *msg = gsm48_msgb_alloc(); |
| 377 | mmctx2msgid(msg, mm); |
| 378 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 379 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 380 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 381 | /* Chapter 9.4.6.2 Detach accept */ |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 382 | static int _tx_detach_ack(struct msgb *msg, uint8_t force_stby, |
| 383 | struct sgsn_mm_ctx *mm) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 384 | { |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 385 | struct gsm48_hdr *gh; |
| 386 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 387 | /* MMCTX might be NULL! */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 388 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 389 | DEBUGP(DMM, "<- GPRS MM DETACH ACC (force-standby: %d)\n", force_stby); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 390 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 391 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 392 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 393 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 394 | gh->data[0] = force_stby; |
| 395 | |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 396 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 397 | } |
| 398 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 399 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
| 400 | { |
| 401 | struct msgb *msg = gsm48_msgb_alloc(); |
| 402 | |
| 403 | mmctx2msgid(msg, mm); |
| 404 | return _tx_detach_ack(msg, force_stby, mm); |
| 405 | } |
| 406 | |
| 407 | static int gsm48_tx_gmm_det_ack_oldmsg(struct msgb *oldmsg, uint8_t force_stby) |
| 408 | { |
| 409 | struct msgb *msg = gsm48_msgb_alloc(); |
| 410 | |
| 411 | gmm_copy_id(msg, oldmsg); |
| 412 | return _tx_detach_ack(msg, force_stby, NULL); |
| 413 | } |
| 414 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 415 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 416 | static 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] | 417 | { |
| 418 | struct msgb *msg = gsm48_msgb_alloc(); |
| 419 | struct gsm48_hdr *gh; |
| 420 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 421 | LOGMMCTXP(LOGL_DEBUG, mm, "<- GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 422 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 423 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 424 | |
| 425 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 426 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 427 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 428 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 429 | gh->data[0] = id_type & 0xf; |
| 430 | |
Harald Welte | dce1255 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 431 | return gsm48_gmm_sendmsg(msg, 1, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 432 | } |
| 433 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 434 | /* Section 9.4.9: Authentication and Ciphering Request */ |
| 435 | static int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, uint8_t *rand, |
| 436 | uint8_t key_seq, uint8_t algo) |
| 437 | { |
| 438 | struct msgb *msg = gsm48_msgb_alloc(); |
| 439 | struct gsm48_hdr *gh; |
| 440 | struct gsm48_auth_ciph_req *acreq; |
| 441 | uint8_t *m_rand, *m_cksn; |
| 442 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 443 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS AUTH AND CIPHERING REQ (rand = %s)\n", |
Pablo Neira Ayuso | c0d17f2 | 2011-05-07 12:12:48 +0200 | [diff] [blame] | 444 | osmo_hexdump(rand, 16)); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 445 | |
| 446 | mmctx2msgid(msg, mm); |
| 447 | |
| 448 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 449 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 450 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; |
| 451 | |
| 452 | acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); |
| 453 | acreq->ciph_alg = algo & 0xf; |
| 454 | acreq->imeisv_req = 0x1; |
| 455 | acreq->force_stby = 0x0; |
| 456 | acreq->ac_ref_nr = 0x0; /* FIXME: increment this? */ |
| 457 | |
| 458 | /* Only if authentication is requested we need to set RAND + CKSN */ |
| 459 | if (rand) { |
| 460 | m_rand = msgb_put(msg, 16+1); |
| 461 | m_rand[0] = GSM48_IE_GMM_AUTH_RAND; |
| 462 | memcpy(m_rand+1, rand, 16); |
| 463 | |
Jacob Erlbeck | 65d8273 | 2014-12-01 10:36:17 +0100 | [diff] [blame] | 464 | m_cksn = msgb_put(msg, 1); |
| 465 | m_cksn[0] = (GSM48_IE_GMM_CIPH_CKSN << 4) | (key_seq & 0x07); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 466 | } |
| 467 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 468 | /* FIXME: make sure we don't send any other messages to the MS */ |
| 469 | |
| 470 | return gsm48_gmm_sendmsg(msg, 1, mm); |
| 471 | } |
| 472 | |
| 473 | /* Section 9.4.11: Authentication and Ciphering Reject */ |
| 474 | static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) |
| 475 | { |
| 476 | struct msgb *msg = gsm48_msgb_alloc(); |
| 477 | struct gsm48_hdr *gh; |
| 478 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 479 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS AUTH AND CIPH REJECT\n"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 480 | |
| 481 | mmctx2msgid(msg, mm); |
| 482 | |
| 483 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 484 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 485 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; |
| 486 | |
| 487 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 488 | } |
| 489 | |
| 490 | /* Section 9.4.10: Authentication and Ciphering Response */ |
| 491 | static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, |
| 492 | struct msgb *msg) |
| 493 | { |
| 494 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 495 | struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; |
| 496 | struct tlv_parsed tp; |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 497 | struct gsm_auth_tuple *at; |
| 498 | int rc; |
| 499 | |
| 500 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH RESPONSE\n"); |
| 501 | |
| 502 | if (ctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 503 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 504 | "Unexpected Auth & Ciph Response (ignored)\n"); |
| 505 | return 0; |
| 506 | } |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 507 | |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 508 | /* Stop T3360 */ |
| 509 | mmctx_timer_stop(ctx, 3360); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 510 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 511 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 512 | (msg->data + msg->len) - acr->data, 0, 0); |
| 513 | |
| 514 | /* FIXME: compare ac_ref? */ |
| 515 | |
| 516 | if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || |
| 517 | !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV)) { |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 518 | /* TODO: missing mandatory IE, return STATUS or REJ? */ |
| 519 | LOGMMCTXP(LOGL_ERROR, ctx, "Missing mandantory IE\n"); |
| 520 | return -EINVAL; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 521 | } |
| 522 | |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 523 | /* Compare SRES with what we expected */ |
| 524 | LOGMMCTXP(LOGL_DEBUG, ctx, "checking received auth info, SRES = %s\n", |
| 525 | osmo_hexdump(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), |
| 526 | TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES))); |
| 527 | |
| 528 | at = &ctx->auth_triplet; |
| 529 | |
| 530 | if (TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES) != sizeof(at->sres) || |
| 531 | memcmp(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), at->sres, |
| 532 | sizeof(at->sres)) != 0) { |
| 533 | |
| 534 | LOGMMCTXP(LOGL_NOTICE, ctx, "Received SRES doesn't match\n"); |
| 535 | rc = gsm48_tx_gmm_auth_ciph_rej(ctx); |
| 536 | mm_ctx_cleanup_free(ctx, "GPRS AUTH AND CIPH REJECT"); |
| 537 | return rc; |
| 538 | } |
| 539 | |
| 540 | ctx->is_authenticated = 1; |
| 541 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 542 | /* FIXME: enable LLC cipheirng */ |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 543 | |
| 544 | /* Check if we can let the mobile station enter */ |
| 545 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 546 | } |
| 547 | |
Holger Hans Peter Freyther | 20de3ae | 2015-05-05 22:52:40 +0200 | [diff] [blame^] | 548 | static void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx) |
| 549 | { |
| 550 | struct gsm_mncc_number called; |
| 551 | uint8_t msisdn[sizeof(ctx->subscr->sgsn_data->msisdn) + 1]; |
| 552 | |
| 553 | /* Convert MSISDN from encoded to string.. */ |
| 554 | if (!ctx->subscr) |
| 555 | return; |
| 556 | |
| 557 | if (ctx->subscr->sgsn_data->msisdn_len < 1) |
| 558 | return; |
| 559 | |
| 560 | /* prepare the data for the decoder */ |
| 561 | memset(&called, 0, sizeof(called)); |
| 562 | msisdn[0] = ctx->subscr->sgsn_data->msisdn_len; |
| 563 | memcpy(&msisdn[1], ctx->subscr->sgsn_data->msisdn, |
| 564 | ctx->subscr->sgsn_data->msisdn_len); |
| 565 | |
| 566 | /* decode the string now */ |
| 567 | gsm48_decode_called(&called, msisdn); |
| 568 | |
| 569 | /* Prepend a '+' for international numbers */ |
| 570 | if (called.plan == 1 && called.type == 1) { |
| 571 | ctx->msisdn[0] = '+'; |
| 572 | strncpy(&ctx->msisdn[1], called.number, |
| 573 | sizeof(ctx->msisdn) - 1); |
| 574 | } else { |
| 575 | strncpy(&ctx->msisdn[0], called.number, |
| 576 | sizeof(ctx->msisdn) - 1); |
| 577 | } |
| 578 | } |
| 579 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 580 | /* Check if we can already authorize a subscriber */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 581 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 582 | { |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 583 | /* Request IMSI and IMEI from the MS if they are unknown */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 584 | if (!strlen(ctx->imei)) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 585 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
| 586 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 587 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 588 | } |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 589 | if (!strlen(ctx->imsi)) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 590 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
| 591 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 592 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 593 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 594 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 595 | /* All information required for authentication is available */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 596 | ctx->t3370_id_type = GSM_MI_TYPE_NONE; |
| 597 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 598 | if (ctx->auth_state == SGSN_AUTH_UNKNOWN) { |
| 599 | /* Request authorization, this leads to a call to |
Jacob Erlbeck | f951a01 | 2014-11-07 14:17:44 +0100 | [diff] [blame] | 600 | * sgsn_auth_update which in turn calls |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 601 | * gsm0408_gprs_access_granted or gsm0408_gprs_access_denied */ |
| 602 | |
Jacob Erlbeck | a0b6efb | 2014-11-13 10:48:39 +0100 | [diff] [blame] | 603 | sgsn_auth_request(ctx); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 604 | /* Note that gsm48_gmm_authorize can be called recursively via |
| 605 | * sgsn_auth_request iff ctx->auth_info changes to AUTH_ACCEPTED |
| 606 | */ |
| 607 | return 0; |
| 608 | } |
| 609 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 610 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && !ctx->is_authenticated) { |
| 611 | struct gsm_auth_tuple *at = &ctx->auth_triplet; |
| 612 | |
| 613 | mmctx_timer_start(ctx, 3360, GSM0408_T3360_SECS); |
| 614 | return gsm48_tx_gmm_auth_ciph_req(ctx, at->rand, at->key_seq, |
| 615 | GPRS_ALGO_GEA0); |
| 616 | } |
| 617 | |
| 618 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && ctx->is_authenticated && |
| 619 | ctx->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { |
| 620 | /* Check again for authorization */ |
| 621 | sgsn_auth_request(ctx); |
| 622 | return 0; |
| 623 | } |
| 624 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 625 | if (ctx->auth_state != SGSN_AUTH_ACCEPTED) { |
| 626 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 627 | "authorization is denied, aborting procedure\n"); |
| 628 | return -EACCES; |
Jacob Erlbeck | 0c06f98 | 2014-10-29 22:12:20 +0100 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | /* The MS is authorized */ |
| 632 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 633 | switch (ctx->pending_req) { |
| 634 | case 0: |
| 635 | LOGMMCTXP(LOGL_INFO, ctx, |
| 636 | "no pending request, authorization completed\n"); |
| 637 | break; |
| 638 | case GSM48_MT_GMM_ATTACH_REQ: |
Holger Hans Peter Freyther | 20de3ae | 2015-05-05 22:52:40 +0200 | [diff] [blame^] | 639 | |
| 640 | extract_subscr_msisdn(ctx); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 641 | #ifdef PTMSI_ALLOC |
| 642 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 643 | mmctx_timer_start(ctx, 3350, GSM0408_T3350_SECS); |
| 644 | ctx->t3350_mode = GMM_T3350_MODE_ATT; |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 645 | #else |
| 646 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 647 | #endif |
| 648 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 649 | return gsm48_tx_gmm_att_ack(ctx); |
| 650 | default: |
| 651 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 652 | "only Attach Request is supported yet, " |
| 653 | "got request type %u\n", ctx->pending_req); |
| 654 | break; |
| 655 | } |
| 656 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 657 | return 0; |
| 658 | } |
| 659 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 660 | void gsm0408_gprs_authenticate(struct sgsn_mm_ctx *ctx) |
| 661 | { |
| 662 | ctx->is_authenticated = 0; |
| 663 | |
| 664 | gsm48_gmm_authorize(ctx); |
| 665 | } |
| 666 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 667 | void gsm0408_gprs_access_granted(struct sgsn_mm_ctx *ctx) |
| 668 | { |
| 669 | switch (ctx->mm_state) { |
| 670 | case GMM_COMMON_PROC_INIT: |
| 671 | LOGP(DMM, LOGL_NOTICE, |
| 672 | "Authorized, continuing procedure, IMSI=%s\n", |
| 673 | ctx->imsi); |
| 674 | /* Continue with the authorization */ |
| 675 | gsm48_gmm_authorize(ctx); |
| 676 | break; |
| 677 | default: |
| 678 | LOGP(DMM, LOGL_INFO, |
| 679 | "Authorized, ignored, IMSI=%s\n", |
| 680 | ctx->imsi); |
| 681 | } |
| 682 | } |
| 683 | |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 684 | 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] | 685 | { |
Jacob Erlbeck | d6267d1 | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 686 | if (gmm_cause == SGSN_ERROR_CAUSE_NONE) |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 687 | gmm_cause = GMM_CAUSE_GPRS_NOTALLOWED; |
| 688 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 689 | switch (ctx->mm_state) { |
| 690 | case GMM_COMMON_PROC_INIT: |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 691 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 692 | "Not authorized, rejecting ATTACH REQUEST " |
| 693 | "with cause '%s' (%d)\n", |
| 694 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 695 | gmm_cause); |
| 696 | gsm48_tx_gmm_att_rej(ctx, gmm_cause); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 697 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJECT"); |
| 698 | break; |
| 699 | case GMM_REGISTERED_NORMAL: |
| 700 | case GMM_REGISTERED_SUSPENDED: |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 701 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 702 | "Authorization lost, detaching " |
| 703 | "with cause '%s' (%d)\n", |
| 704 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 705 | gmm_cause); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 706 | gsm48_tx_gmm_detach_req( |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 707 | ctx, GPRS_DET_T_MT_REATT_NOTREQ, gmm_cause); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 708 | |
| 709 | mm_ctx_cleanup_free(ctx, "auth lost"); |
| 710 | break; |
| 711 | default: |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 712 | LOGMMCTXP(LOGL_INFO, ctx, |
| 713 | "Authorization lost, cause is '%s' (%d)\n", |
| 714 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 715 | gmm_cause); |
| 716 | mm_ctx_cleanup_free(ctx, "auth lost"); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 717 | } |
| 718 | } |
| 719 | |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 720 | 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] | 721 | { |
Jacob Erlbeck | d6267d1 | 2015-01-19 11:10:04 +0100 | [diff] [blame] | 722 | if (gmm_cause != SGSN_ERROR_CAUSE_NONE) { |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 723 | LOGMMCTXP(LOGL_INFO, ctx, |
| 724 | "Cancelled with cause '%s' (%d), deleting context\n", |
| 725 | get_value_string(gsm48_gmm_cause_names, gmm_cause), |
| 726 | gmm_cause); |
| 727 | gsm0408_gprs_access_denied(ctx, gmm_cause); |
| 728 | return; |
Jacob Erlbeck | 98647ca | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 729 | } |
Jacob Erlbeck | af3d5c5 | 2015-01-05 17:51:17 +0100 | [diff] [blame] | 730 | |
| 731 | LOGMMCTXP(LOGL_INFO, ctx, "Cancelled, deleting context silently\n"); |
Jacob Erlbeck | 98647ca | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 732 | mm_ctx_cleanup_free(ctx, "access cancelled"); |
| 733 | } |
| 734 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 735 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 736 | 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] | 737 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 738 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 739 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 740 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 741 | |
| 742 | 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] | 743 | if (!ctx) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 744 | 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] | 745 | return -EINVAL; |
| 746 | } |
| 747 | |
Daniel Willmann | f8070f4 | 2014-09-23 18:48:44 +0200 | [diff] [blame] | 748 | LOGMMCTXP(LOGL_DEBUG, ctx, "-> GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s)\n", |
| 749 | mi_type, mi_string); |
| 750 | |
Jacob Erlbeck | fb26c60 | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 751 | if (ctx->t3370_id_type == GSM_MI_TYPE_NONE) { |
| 752 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 753 | "Got unexpected IDENTITY RESPONSE: mi_type=0x%02x MI(%s), " |
| 754 | "ignoring message\n", |
| 755 | mi_type, mi_string); |
| 756 | return -EINVAL; |
| 757 | } |
| 758 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 759 | if (mi_type == ctx->t3370_id_type) |
| 760 | mmctx_timer_stop(ctx, 3370); |
| 761 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 762 | switch (mi_type) { |
| 763 | case GSM_MI_TYPE_IMSI: |
| 764 | /* we already have a mm context with current TLLI, but no |
| 765 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 766 | * this initial context with data from the HLR */ |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 767 | if (strlen(ctx->imsi) == 0) { |
| 768 | /* Check if we already have a MM context for this IMSI */ |
| 769 | struct sgsn_mm_ctx *ictx; |
| 770 | ictx = sgsn_mm_ctx_by_imsi(mi_string); |
| 771 | if (ictx) { |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 772 | /* Handle it like in gsm48_rx_gmm_det_req, |
| 773 | * except that no messages are sent to the BSS */ |
| 774 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 775 | LOGMMCTXP(LOGL_NOTICE, ctx, "Deleting old MM Context for same IMSI " |
| 776 | "p_tmsi_old=0x%08x\n", |
| 777 | ictx->p_tmsi); |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 778 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 779 | mm_ctx_cleanup_free(ictx, "GPRS IMSI re-use"); |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 780 | } |
| 781 | } |
Jacob Erlbeck | 496aee7 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 782 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi) - 1); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 783 | break; |
| 784 | case GSM_MI_TYPE_IMEI: |
Jacob Erlbeck | 496aee7 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 785 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei) - 1); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 786 | break; |
| 787 | case GSM_MI_TYPE_IMEISV: |
| 788 | break; |
| 789 | } |
| 790 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 791 | /* Check if we can let the mobile station enter */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 792 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | /* Section 9.4.1 Attach request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 796 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 797 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 798 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 799 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 800 | uint8_t *cur = gh->data, *msnc, *mi, *ms_ra_acc_cap; |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 801 | 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] | 802 | uint16_t drx_par; |
| 803 | uint32_t tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 804 | char mi_string[GSM48_MI_SIZE]; |
| 805 | struct gprs_ra_id ra_id; |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 806 | uint16_t cid; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 807 | enum gsm48_gmm_cause reject_cause; |
| 808 | int rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 809 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 810 | LOGP(DMM, LOGL_INFO, "-> GMM ATTACH REQUEST "); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 811 | |
| 812 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 813 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 814 | * or with random TLLI. */ |
| 815 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 816 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 817 | |
| 818 | /* MS network capability 10.5.5.12 */ |
| 819 | msnc_len = *cur++; |
| 820 | msnc = cur; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 821 | if (msnc_len > sizeof(ctx->ms_network_capa.buf)) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 822 | goto err_inval; |
| 823 | cur += msnc_len; |
| 824 | |
| 825 | /* aTTACH Type 10.5.5.2 */ |
| 826 | att_type = *cur++ & 0x0f; |
| 827 | |
| 828 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 829 | drx_par = *cur++ << 8; |
| 830 | drx_par |= *cur++; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 831 | |
| 832 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 833 | mi_len = *cur++; |
| 834 | mi = cur; |
| 835 | if (mi_len > 8) |
| 836 | goto err_inval; |
| 837 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 838 | cur += mi_len; |
| 839 | |
| 840 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 841 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 842 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 843 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 844 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 845 | /* Old routing area identification 10.5.5.15. Skip it */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 846 | cur += 6; |
| 847 | |
| 848 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 849 | ms_ra_acc_cap_len = *cur++; |
| 850 | ms_ra_acc_cap = cur; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 851 | 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] | 852 | goto err_inval; |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 853 | cur += ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 854 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 855 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 856 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 857 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 858 | |
| 859 | switch (mi_type) { |
| 860 | case GSM_MI_TYPE_IMSI: |
| 861 | /* Try to find MM context based on IMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 862 | if (!ctx) |
| 863 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 864 | if (!ctx) { |
| 865 | #if 0 |
| 866 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 867 | #else |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 868 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 869 | if (!ctx) { |
| 870 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 871 | goto rejected; |
| 872 | } |
Jacob Erlbeck | 496aee7 | 2015-01-26 10:38:12 +0100 | [diff] [blame] | 873 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi) - 1); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 874 | #endif |
| 875 | } |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 876 | ctx->tlli = msgb_tlli(msg); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 877 | ctx->llme = llme; |
Harald Welte | 68b99a4 | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 878 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 879 | break; |
| 880 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 881 | memcpy(&tmsi, mi+1, 4); |
| 882 | tmsi = ntohl(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 883 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 884 | if (!ctx) |
| 885 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 886 | if (!ctx) { |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 887 | /* Allocate a context as most of our code expects one. |
| 888 | * Context will not have an IMSI ultil ID RESP is received */ |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 889 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 890 | ctx->p_tmsi = tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 891 | } |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 892 | ctx->tlli = msgb_tlli(msg); |
| 893 | ctx->llme = llme; |
| 894 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 895 | break; |
| 896 | default: |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 897 | LOGP(DMM, LOGL_NOTICE, "Rejecting ATTACH REQUEST with " |
| 898 | "MI type %u\n", mi_type); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 899 | reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; |
| 900 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 901 | } |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 902 | /* Update MM Context with currient RA and Cell ID */ |
| 903 | ctx->ra = ra_id; |
| 904 | ctx->cell_id = cid; |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 905 | /* Update MM Context with other data */ |
| 906 | ctx->drx_parms = drx_par; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 907 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 908 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, |
| 909 | ctx->ms_radio_access_capa.len); |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 910 | ctx->ms_network_capa.len = msnc_len; |
| 911 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
| 912 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 913 | #ifdef PTMSI_ALLOC |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 914 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Jacob Erlbeck | f6e7d99 | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 915 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 916 | if (ctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 917 | ctx->p_tmsi_old = ctx->p_tmsi; |
| 918 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 919 | } |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 920 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 921 | #endif |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 922 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 923 | * foreign TLLI to local TLLI */ |
| 924 | ctx->tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 925 | |
| 926 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 927 | gprs_llgmm_assign(ctx->llme, ctx->tlli, ctx->tlli_new, |
| 928 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 929 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 930 | ctx->pending_req = GSM48_MT_GMM_ATTACH_REQ; |
| 931 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 932 | |
| 933 | err_inval: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 934 | LOGPC(DMM, LOGL_INFO, "\n"); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 935 | reject_cause = GMM_CAUSE_SEM_INCORR_MSG; |
| 936 | |
| 937 | rejected: |
| 938 | /* Send ATTACH REJECT */ |
| 939 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 940 | "Rejecting Attach Request with cause '%s' (%d)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 941 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 942 | rc = gsm48_tx_gmm_att_rej_oldmsg(msg, reject_cause); |
| 943 | if (ctx) |
| 944 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJ"); |
| 945 | else |
| 946 | /* TLLI unassignment */ |
| 947 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, GPRS_ALGO_GEA0, NULL); |
| 948 | |
| 949 | return rc; |
| 950 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 951 | } |
| 952 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 953 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 954 | 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] | 955 | { |
| 956 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 957 | uint8_t detach_type, power_off; |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 958 | int rc = 0; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 959 | |
| 960 | detach_type = gh->data[0] & 0x7; |
| 961 | power_off = gh->data[0] & 0x8; |
| 962 | |
| 963 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
| 964 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 965 | 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] | 966 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 967 | power_off ? "Power-off" : ""); |
| 968 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 969 | /* Only send the Detach Accept (MO) if power off isn't indicated, |
Jacob Erlbeck | b9ab0d4 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 970 | * see 04.08, 4.7.4.1.2/3 for details */ |
| 971 | if (!power_off) { |
| 972 | /* force_stby = 0 */ |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 973 | if (ctx) |
| 974 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 975 | else |
| 976 | rc = gsm48_tx_gmm_det_ack_oldmsg(msg, 0); |
Jacob Erlbeck | b9ab0d4 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 977 | } |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 978 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 979 | if (ctx) |
| 980 | mm_ctx_cleanup_free(ctx, "GPRS DETACH REQUEST"); |
Jacob Erlbeck | 258ce3d | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 981 | |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 982 | return rc; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 983 | } |
| 984 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 985 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 986 | 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] | 987 | { |
| 988 | struct msgb *msg = gsm48_msgb_alloc(); |
| 989 | struct gsm48_hdr *gh; |
| 990 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 991 | uint8_t *mid; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 992 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 993 | LOGMMCTXP(LOGL_INFO, mm, "<- ROUTING AREA UPDATE ACCEPT\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 994 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 995 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 996 | |
| 997 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 998 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 999 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 1000 | |
| 1001 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 1002 | rua->force_stby = 0; /* not indicated */ |
| 1003 | rua->upd_result = 0; /* RA updated */ |
Jacob Erlbeck | 841d95f | 2015-01-23 12:32:38 +0100 | [diff] [blame] | 1004 | rua->ra_upd_timer = gprs_secs_to_tmr_floor(GSM0408_T3312_SECS); |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1005 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1006 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1007 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1008 | #if 0 |
| 1009 | /* Optional: P-TMSI signature */ |
| 1010 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 1011 | ptsig = msgb_put(msg, 3); |
| 1012 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 1013 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 1014 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 1015 | #endif |
| 1016 | |
| 1017 | #ifdef PTMSI_ALLOC |
| 1018 | /* Optional: Allocated P-TMSI */ |
| 1019 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 1020 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 1021 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 1022 | #endif |
| 1023 | |
Jacob Erlbeck | 8de9c48 | 2015-01-23 11:44:39 +0100 | [diff] [blame] | 1024 | /* Optional: Negotiated READY timer value */ |
| 1025 | msgb_tv_put(msg, GSM48_IE_GMM_TIMER_READY, |
| 1026 | gprs_secs_to_tmr_floor(GSM0408_T3314_SECS)); |
| 1027 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1028 | /* Option: MS ID, ... */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1029 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1030 | } |
| 1031 | |
| 1032 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1033 | static 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] | 1034 | { |
| 1035 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1036 | struct gsm48_hdr *gh; |
| 1037 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1038 | LOGP(DMM, LOGL_NOTICE, "<- ROUTING AREA UPDATE REJECT\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1039 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1040 | gmm_copy_id(msg, old_msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1041 | |
| 1042 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 1043 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1044 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 1045 | gh->data[0] = cause; |
| 1046 | gh->data[1] = 0; /* ? */ |
| 1047 | |
| 1048 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1049 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1050 | } |
| 1051 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1052 | 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] | 1053 | const uint8_t *pdp_status) |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1054 | { |
| 1055 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 1056 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 1057 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 1058 | * shall deactivate all those PDP contexts locally (without peer to |
| 1059 | * peer signalling between the MS and the network), which are not in SM |
| 1060 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 1061 | * being in state PDP-INACTIVE. */ |
| 1062 | |
| 1063 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1064 | if (pdp->nsapi < 8) { |
| 1065 | if (!(pdp_status[0] & (1 << pdp->nsapi))) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1066 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1067 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1068 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1069 | sgsn_delete_pdp_ctx(pdp); |
| 1070 | } |
| 1071 | } else { |
| 1072 | if (!(pdp_status[1] & (1 << (pdp->nsapi - 8)))) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1073 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1074 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1075 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1076 | sgsn_delete_pdp_ctx(pdp); |
| 1077 | } |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1078 | } |
| 1079 | } |
| 1080 | } |
| 1081 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1082 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1083 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1084 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1085 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1086 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1087 | uint8_t *cur = gh->data; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1088 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1089 | struct gprs_ra_id old_ra_id; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1090 | struct tlv_parsed tp; |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1091 | uint8_t upd_type; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1092 | enum gsm48_gmm_cause reject_cause; |
| 1093 | int rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1094 | |
| 1095 | /* Update Type 10.5.5.18 */ |
| 1096 | upd_type = *cur++ & 0x0f; |
| 1097 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1098 | LOGP(DMM, LOGL_INFO, "-> GMM RA UPDATE REQUEST type=\"%s\"\n", |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1099 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1100 | |
| 1101 | /* Old routing area identification 10.5.5.15 */ |
| 1102 | gsm48_parse_ra(&old_ra_id, cur); |
| 1103 | cur += 6; |
| 1104 | |
| 1105 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1106 | ms_ra_acc_cap_len = *cur++; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1107 | if (ms_ra_acc_cap_len > 52) { |
| 1108 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1109 | goto rejected; |
| 1110 | } |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1111 | cur += ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1112 | |
| 1113 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 1114 | * DRX parameter, MS network capability */ |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1115 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1116 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1117 | |
| 1118 | switch (upd_type) { |
| 1119 | case GPRS_UPD_T_RA_LA: |
| 1120 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1121 | 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] | 1122 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1123 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1124 | case GPRS_UPD_T_RA: |
| 1125 | case GPRS_UPD_T_PERIODIC: |
| 1126 | break; |
| 1127 | } |
| 1128 | |
| 1129 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Harald Welte | f6bd340 | 2010-12-23 23:34:43 +0100 | [diff] [blame] | 1130 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1131 | if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) { |
Harald Welte | 2b697a6 | 2011-10-16 18:50:56 +0200 | [diff] [blame] | 1132 | /* send a XID reset to re-set all LLC sequence numbers |
| 1133 | * in the MS */ |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1134 | LOGP(DMM, LOGL_NOTICE, "LLC XID RESET\n"); |
Harald Welte | 2b697a6 | 2011-10-16 18:50:56 +0200 | [diff] [blame] | 1135 | gprs_llgmm_reset(llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1136 | /* The MS has to perform GPRS attach */ |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1137 | /* Device is still IMSI attached for CS but initiate GPRS ATTACH, |
| 1138 | * see GSM 04.08, 4.7.5.1.4 and G.6 */ |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1139 | reject_cause = GMM_CAUSE_IMPL_DETACHED; |
| 1140 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1141 | } |
| 1142 | |
Harald Welte | f0901f0 | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 1143 | /* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */ |
| 1144 | msgid2mmctx(mmctx, msg); |
| 1145 | /* Bump the statistics of received signalling msgs for this MM context */ |
| 1146 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 1147 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1148 | /* Update the MM context with the new RA-ID */ |
| 1149 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
Harald Welte | f0901f0 | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 1150 | /* Update the MM context with the new (i.e. foreign) TLLI */ |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1151 | mmctx->tlli = msgb_tlli(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1152 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 1153 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 1154 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1155 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 1156 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1157 | #ifdef PTMSI_ALLOC |
Jacob Erlbeck | f6e7d99 | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 1158 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 1159 | if (mmctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 1160 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 1161 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 1162 | } |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1163 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 1164 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
| 1165 | mmctx_timer_start(mmctx, 3350, GSM0408_T3350_SECS); |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1166 | |
| 1167 | mmctx->mm_state = GMM_COMMON_PROC_INIT; |
| 1168 | #else |
| 1169 | /* Make sure we are NORMAL (i.e. not SUSPENDED anymore) */ |
| 1170 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1171 | #endif |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1172 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 1173 | * foreign TLLI to local TLLI */ |
| 1174 | mmctx->tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1175 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1176 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1177 | gprs_llgmm_assign(mmctx->llme, mmctx->tlli, mmctx->tlli_new, |
| 1178 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1179 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1180 | /* Look at PDP Context Status IE and see if MS's view of |
| 1181 | * activated/deactivated NSAPIs agrees with our view */ |
| 1182 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1183 | 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] | 1184 | process_ms_ctx_status(mmctx, pdp_status); |
| 1185 | } |
| 1186 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1187 | /* Send RA UPDATE ACCEPT */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1188 | return gsm48_tx_gmm_ra_upd_ack(mmctx); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1189 | |
| 1190 | rejected: |
| 1191 | /* Send RA UPDATE REJECT */ |
| 1192 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 1193 | "Rejecting RA Update Request with cause '%s' (%d)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1194 | get_value_string(gsm48_gmm_cause_names, reject_cause), reject_cause); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1195 | rc = gsm48_tx_gmm_ra_upd_rej(msg, reject_cause); |
| 1196 | if (mmctx) |
| 1197 | mm_ctx_cleanup_free(mmctx, "GPRS RA UPDATE REJ"); |
| 1198 | else |
| 1199 | /* TLLI unassignment */ |
| 1200 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, GPRS_ALGO_GEA0, |
| 1201 | NULL); |
| 1202 | |
| 1203 | return rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1204 | } |
| 1205 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1206 | 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] | 1207 | { |
| 1208 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1209 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1210 | LOGMMCTXP(LOGL_INFO, mmctx, "-> GPRS MM STATUS (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1211 | get_value_string(gsm48_gmm_cause_names, gh->data[0])); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1212 | |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
| 1216 | /* GPRS Mobility Management */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1217 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1218 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1219 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1220 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1221 | int rc; |
| 1222 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1223 | /* MMCTX can be NULL when called */ |
| 1224 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1225 | if (!mmctx && |
| 1226 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1227 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1228 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1229 | /* 4.7.10 */ |
Jacob Erlbeck | 14ae582 | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1230 | if (gh->msg_type == GSM48_MT_GMM_STATUS) { |
| 1231 | /* TLLI unassignment */ |
| 1232 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1233 | GPRS_ALGO_GEA0, NULL); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1234 | return 0; |
Jacob Erlbeck | 14ae582 | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1235 | } |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1236 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1237 | /* Don't reply or establish a LLME on DETACH_ACK */ |
| 1238 | if (gh->msg_type == GSM48_MT_GMM_DETACH_ACK) { |
| 1239 | /* TLLI unassignment */ |
| 1240 | return gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1241 | GPRS_ALGO_GEA0, NULL); |
| 1242 | } |
| 1243 | |
Jacob Erlbeck | c4f9bf3 | 2014-11-11 08:55:13 +0100 | [diff] [blame] | 1244 | gprs_llgmm_reset(llme); |
| 1245 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1246 | /* Don't force it into re-attachment */ |
| 1247 | if (gh->msg_type == GSM48_MT_GMM_DETACH_REQ) { |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1248 | /* Handle Detach Request */ |
| 1249 | rc = gsm48_rx_gmm_det_req(NULL, msg); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1250 | |
| 1251 | /* TLLI unassignment */ |
| 1252 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1253 | GPRS_ALGO_GEA0, NULL); |
| 1254 | return rc; |
| 1255 | } |
| 1256 | |
| 1257 | /* Force the MS to re-attach */ |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1258 | rc = sgsn_force_reattach_oldmsg(msg); |
| 1259 | |
| 1260 | /* TLLI unassignment */ |
| 1261 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1262 | GPRS_ALGO_GEA0, NULL); |
| 1263 | return rc; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1264 | } |
| 1265 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1266 | switch (gh->msg_type) { |
| 1267 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1268 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1269 | break; |
| 1270 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1271 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1272 | break; |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1273 | /* For all the following types mmctx can not be NULL */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1274 | case GSM48_MT_GMM_ID_RESP: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1275 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1276 | break; |
| 1277 | case GSM48_MT_GMM_STATUS: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1278 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1279 | break; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1280 | case GSM48_MT_GMM_DETACH_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1281 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1282 | break; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1283 | case GSM48_MT_GMM_DETACH_ACK: |
| 1284 | LOGMMCTXP(LOGL_INFO, mmctx, "-> DETACH ACK\n"); |
| 1285 | mm_ctx_cleanup_free(mmctx, "GPRS DETACH ACK"); |
| 1286 | rc = 0; |
| 1287 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1288 | case GSM48_MT_GMM_ATTACH_COMPL: |
| 1289 | /* only in case SGSN offered new P-TMSI */ |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1290 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ATTACH COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1291 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1292 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1293 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1294 | mmctx->pending_req = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1295 | /* Unassign the old TLLI */ |
| 1296 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1297 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1298 | GPRS_ALGO_GEA0, NULL); |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1299 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1300 | rc = 0; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1301 | break; |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1302 | case GSM48_MT_GMM_RA_UPD_COMPL: |
| 1303 | /* only in case SGSN offered new P-TMSI */ |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1304 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ROUTEING AREA UPDATE COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1305 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1306 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1307 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1308 | mmctx->pending_req = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1309 | /* Unassign the old TLLI */ |
| 1310 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1311 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1312 | GPRS_ALGO_GEA0, NULL); |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1313 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1314 | rc = 0; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1315 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1316 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1317 | LOGMMCTXP(LOGL_INFO, mmctx, "-> PTMSI REALLLICATION COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1318 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1319 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1320 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1321 | mmctx->pending_req = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1322 | /* Unassign the old TLLI */ |
| 1323 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1324 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, GPRS_ALGO_GEA0, NULL); |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1325 | rc = 0; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1326 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1327 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1328 | rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1329 | break; |
| 1330 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1331 | 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] | 1332 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1333 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1334 | break; |
| 1335 | } |
| 1336 | |
| 1337 | return rc; |
| 1338 | } |
| 1339 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1340 | static void mmctx_timer_cb(void *_mm) |
| 1341 | { |
| 1342 | struct sgsn_mm_ctx *mm = _mm; |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1343 | struct gsm_auth_tuple *at; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1344 | |
| 1345 | mm->num_T_exp++; |
| 1346 | |
| 1347 | switch (mm->T) { |
| 1348 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 1349 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1350 | LOGMMCTXP(LOGL_NOTICE, mm, "T3350 expired >= 5 times\n"); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1351 | mm_ctx_cleanup_free(mm, "T3350"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1352 | /* FIXME: should we return some error? */ |
| 1353 | break; |
| 1354 | } |
| 1355 | /* re-transmit the respective msg and re-start timer */ |
| 1356 | switch (mm->t3350_mode) { |
| 1357 | case GMM_T3350_MODE_ATT: |
| 1358 | gsm48_tx_gmm_att_ack(mm); |
| 1359 | break; |
| 1360 | case GMM_T3350_MODE_RAU: |
| 1361 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 1362 | break; |
| 1363 | case GMM_T3350_MODE_PTMSI_REALL: |
| 1364 | /* FIXME */ |
| 1365 | break; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1366 | case GMM_T3350_MODE_NONE: |
| 1367 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 1368 | "T3350 mode wasn't set, ignoring timeout\n"); |
| 1369 | break; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1370 | } |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1371 | osmo_timer_schedule(&mm->timer, GSM0408_T3350_SECS, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1372 | break; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1373 | case 3360: /* waiting for AUTH AND CIPH RESP */ |
| 1374 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1375 | LOGMMCTXP(LOGL_NOTICE, mm, "T3360 expired >= 5 times\n"); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1376 | mm_ctx_cleanup_free(mm, "T3360"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1377 | break; |
| 1378 | } |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1379 | /* Re-transmit the respective msg and re-start timer */ |
| 1380 | if (mm->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 1381 | LOGMMCTXP(LOGL_ERROR, mm, |
| 1382 | "timeout: invalid auth triplet reference\n"); |
| 1383 | mm_ctx_cleanup_free(mm, "T3360"); |
| 1384 | break; |
| 1385 | } |
| 1386 | at = &mm->auth_triplet; |
| 1387 | |
| 1388 | gsm48_tx_gmm_auth_ciph_req(mm, at->rand, at->key_seq, GPRS_ALGO_GEA0); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1389 | osmo_timer_schedule(&mm->timer, GSM0408_T3360_SECS, 0); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1390 | break; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1391 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 1392 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1393 | LOGMMCTXP(LOGL_NOTICE, mm, "T3370 expired >= 5 times\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1394 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1395 | mm_ctx_cleanup_free(mm, "GPRS ATTACH REJECT (T3370)"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1396 | break; |
| 1397 | } |
| 1398 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 1399 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1400 | osmo_timer_schedule(&mm->timer, GSM0408_T3370_SECS, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1401 | break; |
| 1402 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1403 | LOGMMCTXP(LOGL_ERROR, mm, "timer expired in unknown mode %u\n", |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1404 | mm->T); |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | /* GPRS SESSION MANAGEMENT */ |
| 1409 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1410 | static void pdpctx_timer_cb(void *_mm); |
| 1411 | |
| 1412 | static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, |
| 1413 | unsigned int seconds) |
| 1414 | { |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1415 | if (osmo_timer_pending(&pdp->timer)) |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1416 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 1417 | "timer %u pending\n", T, pdp->T); |
| 1418 | pdp->T = T; |
| 1419 | pdp->num_T_exp = 0; |
| 1420 | |
| 1421 | /* FIXME: we should do this only once ? */ |
| 1422 | pdp->timer.data = pdp; |
| 1423 | pdp->timer.cb = &pdpctx_timer_cb; |
| 1424 | |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1425 | osmo_timer_schedule(&pdp->timer, seconds, 0); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1426 | } |
| 1427 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1428 | #if 0 |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1429 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 1430 | { |
| 1431 | uint8_t v[6]; |
| 1432 | |
| 1433 | v[0] = PDP_TYPE_ORG_IETF; |
| 1434 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 1435 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 1436 | |
| 1437 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1438 | } |
| 1439 | |
| 1440 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 1441 | { |
| 1442 | uint8_t v[2]; |
| 1443 | |
| 1444 | v[0] = PDP_TYPE_ORG_ETSI; |
| 1445 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 1446 | |
| 1447 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1448 | } |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1449 | #endif |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1450 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1451 | /* Section 9.5.2: Ativate PDP Context Accept */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1452 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1453 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1454 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1455 | struct gsm48_hdr *gh; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1456 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1457 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1458 | LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1459 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1460 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1461 | |
| 1462 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1463 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1464 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1465 | |
| 1466 | /* Negotiated LLC SAPI */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1467 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1468 | |
Harald Welte | 55e0df7 | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 1469 | /* FIXME: copy QoS parameters from original request */ |
| 1470 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 1471 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1472 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1473 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1474 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1475 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1476 | /* PDP address */ |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1477 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 1478 | * the IE is identical with the 04.08 PDP Address IE */ |
| 1479 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1480 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 1481 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1482 | pdp->lib->eua.v[0] |= 0xf0; |
| 1483 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1484 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
Holger Hans Peter Freyther | d219507 | 2014-04-04 11:55:21 +0200 | [diff] [blame] | 1485 | if (pdp->lib->pco_req.l) |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1486 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | 3c0b9b9 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 1487 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1488 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1489 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1490 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1491 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1492 | } |
| 1493 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1494 | /* Section 9.5.3: Activate PDP Context reject */ |
| 1495 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1496 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 1497 | { |
| 1498 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1499 | struct gsm48_hdr *gh; |
| 1500 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1501 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1502 | LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1503 | |
| 1504 | mmctx2msgid(msg, mm); |
| 1505 | |
| 1506 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1507 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1508 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 1509 | |
| 1510 | msgb_v_put(msg, cause); |
| 1511 | if (pco_len && pco_v) |
| 1512 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 1513 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1514 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1515 | } |
| 1516 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1517 | /* Section 9.5.8: Deactivate PDP Context Request */ |
| 1518 | static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1519 | uint8_t sm_cause) |
| 1520 | { |
| 1521 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1522 | struct gsm48_hdr *gh; |
| 1523 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1524 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1525 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1526 | |
| 1527 | mmctx2msgid(msg, mm); |
| 1528 | |
| 1529 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1530 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1531 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; |
| 1532 | |
| 1533 | msgb_v_put(msg, sm_cause); |
| 1534 | |
| 1535 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1536 | } |
| 1537 | int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause) |
| 1538 | { |
| 1539 | pdpctx_timer_start(pdp, 3395, GSM0408_T3395_SECS); |
| 1540 | |
| 1541 | return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause); |
| 1542 | } |
| 1543 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1544 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1545 | 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] | 1546 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1547 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1548 | struct gsm48_hdr *gh; |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1549 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1550 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1551 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1552 | |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1553 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1554 | |
| 1555 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1556 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1557 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 1558 | |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1559 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1560 | } |
| 1561 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 1562 | { |
| 1563 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1564 | } |
| 1565 | |
| 1566 | /* Section 9.5.1: Activate PDP Context Request */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1567 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 1568 | struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1569 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1570 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1571 | 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] | 1572 | uint8_t req_qos_len, req_pdpa_len; |
| 1573 | uint8_t *req_qos, *req_pdpa; |
| 1574 | struct tlv_parsed tp; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1575 | uint8_t transaction_id = (gh->proto_discr >> 4); |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1576 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1577 | struct sgsn_pdp_ctx *pdp; |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 1578 | enum gsm48_gsm_cause gsm_cause; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1579 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1580 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1581 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1582 | |
Harald Welte | 23c1376 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1583 | /* FIXME: length checks! */ |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1584 | req_qos_len = act_req->data[0]; |
| 1585 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 1586 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 1587 | 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] | 1588 | |
Harald Welte | 23c1376 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1589 | /* Optional: Access Point Name, Protocol Config Options */ |
| 1590 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 1591 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 1592 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 1593 | else |
| 1594 | memset(&tp, 0, sizeof(tp)); |
| 1595 | |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1596 | switch (req_pdpa[0] & 0xf) { |
| 1597 | case 0x0: |
| 1598 | DEBUGPC(DMM, "ETSI "); |
| 1599 | break; |
| 1600 | case 0x1: |
| 1601 | DEBUGPC(DMM, "IETF "); |
| 1602 | break; |
| 1603 | case 0xf: |
| 1604 | DEBUGPC(DMM, "Empty "); |
| 1605 | break; |
| 1606 | } |
| 1607 | |
| 1608 | switch (req_pdpa[1]) { |
| 1609 | case 0x21: |
| 1610 | DEBUGPC(DMM, "IPv4 "); |
| 1611 | if (req_pdpa_len >= 6) { |
| 1612 | struct in_addr ia; |
| 1613 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 1614 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 1615 | } |
| 1616 | break; |
| 1617 | case 0x57: |
| 1618 | DEBUGPC(DMM, "IPv6 "); |
| 1619 | if (req_pdpa_len >= 18) { |
| 1620 | /* FIXME: print IPv6 address */ |
| 1621 | } |
| 1622 | break; |
| 1623 | default: |
| 1624 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 1625 | break; |
| 1626 | } |
| 1627 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1628 | LOGPC(DMM, LOGL_INFO, "\n"); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1629 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1630 | /* put the non-TLV elements in the TLV parser structure to |
| 1631 | * pass them on to the SGSN / GTP code */ |
| 1632 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 1633 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 1634 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 1635 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 1636 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1637 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 1638 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 1639 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 1640 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1641 | GSM_CAUSE_INV_MAND_INFO, |
| 1642 | 0, NULL); |
| 1643 | } |
| 1644 | |
| 1645 | /* Check if NSAPI is already in use */ |
Harald Welte | b37515e | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 1646 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 1647 | if (pdp) { |
| 1648 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 1649 | if (pdp->sapi == act_req->req_llc_sapi && |
| 1650 | pdp->ti == transaction_id) { |
| 1651 | /* This apparently is a re-transmission of a PDP CTX |
| 1652 | * ACT REQ (our ACT ACK must have got dropped) */ |
| 1653 | return gsm48_tx_gsm_act_pdp_acc(pdp); |
| 1654 | } |
| 1655 | |
| 1656 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1657 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1658 | GSM_CAUSE_NSAPI_IN_USE, |
| 1659 | 0, NULL); |
| 1660 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1661 | |
Harald Welte | 19f9e30 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 1662 | /* Only increment counter for a real activation, after we checked |
| 1663 | * for re-transmissions */ |
| 1664 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 1665 | |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 1666 | /* Determine GGSN based on APN and subscription options */ |
| 1667 | ggsn = sgsn_mm_ctx_find_ggsn_ctx(mmctx, &tp, &gsm_cause); |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1668 | if (!ggsn) { |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 1669 | LOGP(DGPRS, LOGL_ERROR, "No GGSN context found!\n"); |
| 1670 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1671 | gsm_cause, 0, NULL); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1672 | } |
Jacob Erlbeck | 277b71e | 2015-02-02 18:03:05 +0100 | [diff] [blame] | 1673 | LOGMMCTXP(LOGL_DEBUG, mmctx, "Using GGSN %d\n", ggsn->id); |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1674 | ggsn->gsn = sgsn->gsn; |
| 1675 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, act_req->req_nsapi, &tp); |
| 1676 | if (!pdp) |
| 1677 | return -1; |
| 1678 | |
| 1679 | /* Store SAPI and Transaction Identifier */ |
| 1680 | pdp->sapi = act_req->req_llc_sapi; |
| 1681 | pdp->ti = transaction_id; |
| 1682 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1683 | return 0; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1684 | } |
| 1685 | |
| 1686 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1687 | 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] | 1688 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1689 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1690 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1691 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1692 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1693 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1694 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1695 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1696 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1697 | if (!pdp) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1698 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for " |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1699 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1700 | mm->imsi, transaction_id); |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1701 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1702 | } |
| 1703 | |
| 1704 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1705 | } |
| 1706 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1707 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
| 1708 | static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) |
| 1709 | { |
| 1710 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 1711 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1712 | struct sgsn_pdp_ctx *pdp; |
| 1713 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1714 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1715 | |
| 1716 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1717 | if (!pdp) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1718 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for " |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1719 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1720 | mm->imsi, transaction_id); |
| 1721 | return 0; |
| 1722 | } |
| 1723 | |
| 1724 | return sgsn_delete_pdp_ctx(pdp); |
| 1725 | } |
| 1726 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1727 | 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] | 1728 | { |
| 1729 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1730 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1731 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n", |
Jacob Erlbeck | afcf230 | 2015-01-05 17:30:02 +0100 | [diff] [blame] | 1732 | get_value_string(gsm48_gsm_cause_names, gh->data[0])); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1733 | |
| 1734 | return 0; |
| 1735 | } |
| 1736 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1737 | static void pdpctx_timer_cb(void *_pdp) |
| 1738 | { |
| 1739 | struct sgsn_pdp_ctx *pdp = _pdp; |
| 1740 | |
| 1741 | pdp->num_T_exp++; |
| 1742 | |
| 1743 | switch (pdp->T) { |
| 1744 | case 3395: /* waiting for PDP CTX DEACT ACK */ |
| 1745 | if (pdp->num_T_exp >= 4) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1746 | LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired >= 5 times\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1747 | pdp->state = PDP_STATE_INACTIVE; |
| 1748 | sgsn_delete_pdp_ctx(pdp); |
| 1749 | break; |
| 1750 | } |
| 1751 | gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1752 | osmo_timer_schedule(&pdp->timer, GSM0408_T3395_SECS, 0); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1753 | break; |
| 1754 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1755 | LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n", |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1756 | pdp->T); |
| 1757 | } |
| 1758 | } |
| 1759 | |
| 1760 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1761 | /* GPRS Session Management */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1762 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1763 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1764 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1765 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1766 | int rc; |
| 1767 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1768 | /* MMCTX can be NULL when called */ |
| 1769 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1770 | if (!mmctx) { |
| 1771 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1772 | /* 6.1.3.6 */ |
| 1773 | if (gh->msg_type == GSM48_MT_GSM_STATUS) |
| 1774 | return 0; |
| 1775 | |
| 1776 | return sgsn_force_reattach_oldmsg(msg); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1777 | } |
| 1778 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1779 | switch (gh->msg_type) { |
| 1780 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1781 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1782 | break; |
| 1783 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1784 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1785 | break; |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1786 | case GSM48_MT_GSM_DEACT_PDP_ACK: |
| 1787 | rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); |
| 1788 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1789 | case GSM48_MT_GSM_STATUS: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1790 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1791 | break; |
| 1792 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 1793 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 1794 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1795 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1796 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1797 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1798 | break; |
| 1799 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1800 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1801 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1802 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1803 | break; |
| 1804 | |
| 1805 | } |
| 1806 | |
| 1807 | return rc; |
| 1808 | } |
| 1809 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1810 | int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg) |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1811 | { |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1812 | int rc; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1813 | gprs_llgmm_reset_oldmsg(msg, GPRS_SAPI_GMM); |
| 1814 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1815 | rc = gsm48_tx_gmm_detach_req_oldmsg( |
| 1816 | msg, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1817 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1818 | return rc; |
| 1819 | } |
| 1820 | |
| 1821 | int gsm0408_gprs_force_reattach(struct sgsn_mm_ctx *mmctx) |
| 1822 | { |
| 1823 | int rc; |
| 1824 | gprs_llgmm_reset(mmctx->llme); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1825 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1826 | rc = gsm48_tx_gmm_detach_req( |
| 1827 | mmctx, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1828 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1829 | mm_ctx_cleanup_free(mmctx, "forced reattach"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1830 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1831 | return rc; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1832 | } |
| 1833 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1834 | /* Main entry point for incoming 04.08 GPRS messages */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1835 | int gsm0408_gprs_rcvmsg(struct msgb *msg, struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1836 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1837 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1838 | uint8_t pdisc = gh->proto_discr & 0x0f; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1839 | struct sgsn_mm_ctx *mmctx; |
| 1840 | struct gprs_ra_id ra_id; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1841 | int rc = -EINVAL; |
| 1842 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1843 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 1844 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1845 | if (mmctx) { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1846 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1847 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1848 | mmctx->llme = llme; |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1849 | } |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1850 | |
| 1851 | /* MMCTX can be NULL */ |
| 1852 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1853 | switch (pdisc) { |
| 1854 | case GSM48_PDISC_MM_GPRS: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1855 | rc = gsm0408_rcv_gmm(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1856 | break; |
| 1857 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1858 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1859 | break; |
| 1860 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1861 | LOGP(DMM, LOGL_NOTICE, "Unknown GSM 04.08 discriminator 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1862 | pdisc); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1863 | /* FIXME: return status message */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1864 | break; |
| 1865 | } |
| 1866 | |
Jacob Erlbeck | 258ce3d | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 1867 | /* MMCTX can be invalid */ |
| 1868 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1869 | return rc; |
| 1870 | } |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1871 | |
| 1872 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 1873 | { |
| 1874 | struct sgsn_mm_ctx *mmctx; |
| 1875 | |
| 1876 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1877 | if (!mmctx) { |
| 1878 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 1879 | "TLLI=%08x\n", tlli); |
| 1880 | return -EINVAL; |
| 1881 | } |
| 1882 | |
Jacob Erlbeck | 7dba11f | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 1883 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 1884 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1885 | LOGMMCTXP(LOGL_NOTICE, mmctx, "SUSPEND request while state " |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1886 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 1887 | return -EINVAL; |
| 1888 | } |
| 1889 | |
| 1890 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
| 1891 | mmctx->mm_state = GMM_REGISTERED_SUSPENDED; |
| 1892 | return 0; |
| 1893 | } |
| 1894 | |
| 1895 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 1896 | uint8_t suspend_ref) |
| 1897 | { |
| 1898 | struct sgsn_mm_ctx *mmctx; |
| 1899 | |
| 1900 | /* FIXME: make use of suspend reference? */ |
| 1901 | |
| 1902 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1903 | if (!mmctx) { |
| 1904 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 1905 | "TLLI=%08x\n", tlli); |
| 1906 | return -EINVAL; |
| 1907 | } |
| 1908 | |
Jacob Erlbeck | 7dba11f | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 1909 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 1910 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1911 | LOGMMCTXP(LOGL_NOTICE, mmctx, "RESUME request while state " |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1912 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 1913 | /* FIXME: should we not simply ignore it? */ |
| 1914 | return -EINVAL; |
| 1915 | } |
| 1916 | |
| 1917 | /* Transition from SUSPENDED to NORMAL */ |
| 1918 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
| 1919 | return 0; |
| 1920 | } |