Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 4 | /* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 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 |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 28 | #include <stdint.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 29 | #include <errno.h> |
| 30 | |
| 31 | #include <netinet/in.h> |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 32 | #include <arpa/inet.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 33 | |
| 34 | #include <openbsc/db.h> |
| 35 | #include <osmocore/msgb.h> |
| 36 | #include <osmocore/tlv.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 37 | #include <osmocore/gsm_utils.h> |
| 38 | #include <osmocore/signal.h> |
| 39 | #include <osmocore/talloc.h> |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 40 | #include <osmocore/rate_ctr.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 41 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 42 | #include <openbsc/debug.h> |
| 43 | #include <openbsc/gsm_data.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 44 | #include <openbsc/gsm_subscriber.h> |
| 45 | #include <openbsc/gsm_04_08.h> |
| 46 | #include <openbsc/gsm_04_08_gprs.h> |
| 47 | #include <openbsc/paging.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 48 | #include <openbsc/transaction.h> |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 49 | #include <openbsc/gprs_bssgp.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 50 | #include <openbsc/gprs_llc.h> |
| 51 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 52 | #include <openbsc/gprs_gmm.h> |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 53 | #include <openbsc/sgsn.h> |
| 54 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 55 | #include <pdp.h> |
| 56 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 57 | #define PTMSI_ALLOC |
| 58 | |
| 59 | /* Section 11.2.2 / Table 11.4 MM timers netowkr side */ |
| 60 | #define GSM0408_T3322_SECS 6 /* DETACH_REQ -> DETACH_ACC */ |
| 61 | #define GSM0408_T3350_SECS 6 /* waiting for ATT/RAU/TMSI COMPL */ |
| 62 | #define GSM0408_T3360_SECS 6 /* waiting for AUTH/CIPH RESP */ |
| 63 | #define GSM0408_T3370_SECS 6 /* waiting for ID RESP */ |
| 64 | |
| 65 | /* Section 11.2.2 / Table 11.4a MM timers netowkr side */ |
| 66 | #define GSM0408_T3313_SECS 30 /* waiting for paging response */ |
| 67 | #define GSM0408_T3314_SECS 44 /* force to STBY on expiry */ |
| 68 | #define GSM0408_T3316_SECS 44 |
| 69 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 70 | extern struct sgsn_instance *sgsn; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 71 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 72 | /* Protocol related stuff, should go into libosmocore */ |
| 73 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 74 | /* 10.5.5.14 GPRS MM Cause / Table 10.5.147 */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 75 | const struct value_string gmm_cause_names[] = { |
Harald Welte | 17b2646 | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 76 | { GMM_CAUSE_IMSI_UNKNOWN, "IMSI unknown in HLR" }, |
| 77 | { GMM_CAUSE_ILLEGAL_MS, "Illegal MS" }, |
| 78 | { GMM_CAUSE_ILLEGAL_ME, "Illegal ME" }, |
| 79 | { GMM_CAUSE_GPRS_NOTALLOWED, "GPRS services not allowed" }, |
| 80 | { GMM_CAUSE_GPRS_OTHER_NOTALLOWED, |
| 81 | "GPRS services and non-GPRS services not allowed" }, |
| 82 | { GMM_CAUSE_MS_ID_NOT_DERIVED, |
| 83 | "MS identity cannot be derived by the network" }, |
| 84 | { GMM_CAUSE_IMPL_DETACHED, "Implicitly detached" }, |
| 85 | { GMM_CAUSE_PLMN_NOTALLOWED, "PLMN not allowed" }, |
| 86 | { GMM_CAUSE_LA_NOTALLOWED, "Location Area not allowed" }, |
| 87 | { GMM_CAUSE_ROAMING_NOTALLOWED, |
| 88 | "Roaming not allowed in this location area" }, |
| 89 | { GMM_CAUSE_NO_GPRS_PLMN, |
| 90 | "GPRS services not allowed in this PLMN" }, |
| 91 | { GMM_CAUSE_MSC_TEMP_NOTREACH, "MSC temporarily not reachable" }, |
| 92 | { GMM_CAUSE_NET_FAIL, "Network failure" }, |
| 93 | { GMM_CAUSE_CONGESTION, "Congestion" }, |
| 94 | { GMM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 95 | { GMM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 96 | { GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 97 | "Message type non-existant or not implemented" }, |
| 98 | { GMM_CAUSE_MSGT_INCOMP_P_STATE, |
| 99 | "Message type not compatible with protocol state" }, |
| 100 | { GMM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 101 | "Information element non-existent or not implemented" }, |
Harald Welte | 17b2646 | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 102 | { GMM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 103 | { GMM_CAUSE_MSG_INCOMP_P_STATE, |
| 104 | "Message not compatible with protocol state " }, |
Harald Welte | 17b2646 | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 105 | { GMM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 106 | { 0, NULL } |
| 107 | }; |
| 108 | |
| 109 | /* 10.5.6.6 SM Cause / Table 10.5.157 */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 110 | const struct value_string gsm_cause_names[] = { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 111 | { GSM_CAUSE_INSUFF_RSRC, "Insufficient resources" }, |
| 112 | { GSM_CAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 113 | { GSM_CAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 114 | { GSM_CAUSE_AUTH_FAILED, "User Authentication failed" }, |
| 115 | { GSM_CAUSE_ACT_REJ_GGSN, "Activation rejected by GGSN" }, |
| 116 | { GSM_CAUSE_ACT_REJ_UNSPEC, "Activation rejected, unspecified" }, |
| 117 | { GSM_CAUSE_SERV_OPT_NOTSUPP, "Service option not supported" }, |
| 118 | { GSM_CAUSE_REQ_SERV_OPT_NOTSUB, |
| 119 | "Requested service option not subscribed" }, |
| 120 | { GSM_CAUSE_SERV_OPT_TEMP_OOO, |
| 121 | "Service option temporarily out of order" }, |
| 122 | { GSM_CAUSE_NSAPI_IN_USE, "NSAPI already used" }, |
| 123 | { GSM_CAUSE_DEACT_REGULAR, "Regular deactivation" }, |
| 124 | { GSM_CAUSE_QOS_NOT_ACCEPTED, "QoS not accepted" }, |
| 125 | { GSM_CAUSE_NET_FAIL, "Network Failure" }, |
| 126 | { GSM_CAUSE_REACT_RQD, "Reactivation required" }, |
| 127 | { GSM_CAUSE_FEATURE_NOTSUPP, "Feature not supported " }, |
| 128 | { GSM_CAUSE_INVALID_TRANS_ID, "Invalid transaction identifier" }, |
| 129 | { GSM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
| 130 | { GSM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 131 | { GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 132 | "Message type non-existant or not implemented" }, |
| 133 | { GSM_CAUSE_MSGT_INCOMP_P_STATE, |
| 134 | "Message type not compatible with protocol state" }, |
| 135 | { GSM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 136 | "Information element non-existent or not implemented" }, |
| 137 | { GSM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
| 138 | { GSM_CAUSE_MSG_INCOMP_P_STATE, |
| 139 | "Message not compatible with protocol state " }, |
| 140 | { GSM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
| 141 | { 0, NULL } |
| 142 | }; |
| 143 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 144 | /* 10.5.5.2 */ |
| 145 | const struct value_string gprs_att_t_strs[] = { |
| 146 | { GPRS_ATT_T_ATTACH, "GPRS attach" }, |
| 147 | { GPRS_ATT_T_ATT_WHILE_IMSI, "GPRS attach while IMSI attached" }, |
| 148 | { GPRS_ATT_T_COMBINED, "Combined GPRS/IMSI attach" }, |
| 149 | { 0, NULL } |
| 150 | }; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 151 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 152 | const struct value_string gprs_upd_t_strs[] = { |
| 153 | { GPRS_UPD_T_RA, "RA updating" }, |
| 154 | { GPRS_UPD_T_RA_LA, "combined RA/LA updating" }, |
| 155 | { GPRS_UPD_T_RA_LA_IMSI_ATT, "combined RA/LA updating + IMSI attach" }, |
| 156 | { GPRS_UPD_T_PERIODIC, "periodic updating" }, |
| 157 | { 0, NULL } |
| 158 | }; |
| 159 | |
| 160 | /* 10.5.5.5 */ |
| 161 | const struct value_string gprs_det_t_mo_strs[] = { |
| 162 | { GPRS_DET_T_MO_GPRS, "GPRS detach" }, |
| 163 | { GPRS_DET_T_MO_IMSI, "IMSI detach" }, |
| 164 | { GPRS_DET_T_MO_COMBINED, "Combined GPRS/IMSI detach" }, |
| 165 | { 0, NULL } |
| 166 | }; |
| 167 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 168 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 169 | .def = { |
| 170 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 171 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
| 172 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_TV, 3 }, |
| 173 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_TV, 16 }, |
| 174 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_TV, 4 }, |
| 175 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
| 176 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_TV, 2 }, |
| 177 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 178 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 179 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 180 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 181 | }, |
| 182 | }; |
| 183 | |
| 184 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 185 | .def = { |
| 186 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 187 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 188 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 189 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 190 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 191 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
| 192 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_TV, 1 }, |
| 193 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_TV, 7 }, |
| 194 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 195 | }, |
| 196 | }; |
| 197 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 198 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 199 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 200 | static void mmctx_timer_cb(void *_mm); |
| 201 | |
| 202 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 203 | unsigned int seconds) |
| 204 | { |
| 205 | if (bsc_timer_pending(&mm->timer)) |
| 206 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 207 | "timer %u pending\n", T, mm->T); |
| 208 | mm->T = T; |
| 209 | mm->num_T_exp = 0; |
| 210 | |
| 211 | /* FIXME: we should do this only once ? */ |
| 212 | mm->timer.data = mm; |
| 213 | mm->timer.cb = &mmctx_timer_cb; |
| 214 | |
| 215 | bsc_schedule_timer(&mm->timer, seconds, 0); |
| 216 | } |
| 217 | |
| 218 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 219 | { |
| 220 | if (mm->T != T) |
| 221 | LOGP(DMM, LOGL_ERROR, "Stopping MM timer %u but " |
| 222 | "%u is running\n", T, mm->T); |
| 223 | bsc_del_timer(&mm->timer); |
| 224 | } |
| 225 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 226 | /* Send a message through the underlying layer */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 227 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
| 228 | const struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 229 | { |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 230 | if (mm) |
| 231 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
| 232 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 233 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 234 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 235 | } |
| 236 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 237 | /* copy identifiers from old message to new message, this |
| 238 | * is required so lower layers can route it correctly */ |
| 239 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 240 | { |
| 241 | msgb_tlli(msg) = msgb_tlli(old); |
| 242 | msgb_bvci(msg) = msgb_bvci(old); |
| 243 | msgb_nsei(msg) = msgb_nsei(old); |
| 244 | } |
| 245 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 246 | /* Store BVCI/NSEI in MM context */ |
| 247 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 248 | { |
| 249 | mm->bvci = msgb_bvci(msg); |
| 250 | mm->nsei = msgb_nsei(msg); |
| 251 | } |
| 252 | |
| 253 | /* Store BVCI/NSEI in MM context */ |
| 254 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 255 | { |
| 256 | msgb_tlli(msg) = mm->tlli; |
| 257 | msgb_bvci(msg) = mm->bvci; |
| 258 | msgb_nsei(msg) = mm->nsei; |
| 259 | } |
| 260 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 261 | /* Chapter 9.4.18 */ |
| 262 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 263 | struct sgsn_mm_ctx *mmctx, int sm) |
| 264 | { |
| 265 | struct gsm48_hdr *gh; |
| 266 | |
| 267 | /* MMCTX might be NULL! */ |
| 268 | |
| 269 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
| 270 | get_value_string(gmm_cause_names, cause)); |
| 271 | |
| 272 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 273 | if (sm) { |
| 274 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 275 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 276 | } else { |
| 277 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 278 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 279 | } |
| 280 | gh->data[0] = cause; |
| 281 | |
| 282 | return gsm48_gmm_sendmsg(msg, 0, mmctx); |
| 283 | } |
| 284 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 285 | { |
| 286 | struct msgb *msg = gsm48_msgb_alloc(); |
| 287 | |
| 288 | mmctx2msgid(msg, mmctx); |
| 289 | return _tx_status(msg, cause, mmctx, 0); |
| 290 | }; |
| 291 | static int gsm48_tx_gmm_status_oldmsg(struct msgb *oldmsg, uint8_t cause) |
| 292 | { |
| 293 | struct msgb *msg = gsm48_msgb_alloc(); |
| 294 | |
| 295 | gmm_copy_id(msg, oldmsg); |
| 296 | return _tx_status(msg, cause, NULL, 0); |
| 297 | } |
| 298 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 299 | { |
| 300 | struct msgb *msg = gsm48_msgb_alloc(); |
| 301 | |
| 302 | mmctx2msgid(msg, mmctx); |
| 303 | return _tx_status(msg, cause, mmctx, 1); |
| 304 | }; |
| 305 | static int gsm48_tx_sm_status_oldmsg(struct msgb *oldmsg, uint8_t cause) |
| 306 | { |
| 307 | struct msgb *msg = gsm48_msgb_alloc(); |
| 308 | |
| 309 | gmm_copy_id(msg, oldmsg); |
| 310 | return _tx_status(msg, cause, NULL, 1); |
| 311 | } |
| 312 | |
| 313 | |
Harald Welte | 242d172 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 314 | static struct gsm48_qos default_qos = { |
| 315 | .delay_class = 4, /* best effort */ |
| 316 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 317 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 318 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 319 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 320 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 321 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 322 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 323 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 324 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 325 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 326 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 327 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 328 | .handling_prio = 3, |
| 329 | .xfer_delay = 0x10, /* 200ms */ |
| 330 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 331 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 332 | .sig_ind = 0, /* not optimised for signalling */ |
| 333 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 334 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 335 | }; |
| 336 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 337 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 338 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 339 | { |
| 340 | struct msgb *msg = gsm48_msgb_alloc(); |
| 341 | struct gsm48_hdr *gh; |
| 342 | struct gsm48_attach_ack *aa; |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 343 | uint8_t *ptsig, *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 344 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 345 | DEBUGP(DMM, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 346 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 347 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 348 | |
| 349 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 350 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 351 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 352 | |
| 353 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 354 | aa->force_stby = 0; /* not indicated */ |
| 355 | aa->att_result = 1; /* GPRS only */ |
| 356 | aa->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
| 357 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 358 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 359 | |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 360 | #if 0 |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 361 | /* Optional: P-TMSI signature */ |
| 362 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 363 | ptsig = msgb_put(msg, 3); |
| 364 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 365 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 366 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 367 | |
| 368 | /* Optional: Negotiated Ready timer value */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 369 | #endif |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 370 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 371 | #ifdef PTMSI_ALLOC |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 372 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 373 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 374 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 375 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 376 | #endif |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 377 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 378 | /* Optional: MS-identity (combined attach) */ |
| 379 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 380 | |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 381 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 385 | static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 386 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 387 | struct gsm48_hdr *gh; |
| 388 | |
| 389 | DEBUGP(DMM, "<- GPRS ATTACH REJECT\n"); |
| 390 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [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_ATTACH_REJ; |
| 394 | gh->data[0] = gmm_cause; |
| 395 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 396 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 397 | } |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 398 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 399 | uint8_t gmm_cause) |
| 400 | { |
| 401 | struct msgb *msg = gsm48_msgb_alloc(); |
| 402 | gmm_copy_id(msg, old_msg); |
| 403 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 404 | } |
| 405 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 406 | uint8_t gmm_cause) |
| 407 | { |
| 408 | struct msgb *msg = gsm48_msgb_alloc(); |
| 409 | mmctx2msgid(msg, mm); |
| 410 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 411 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 412 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 413 | /* Chapter 9.4.6.2 Detach accept */ |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 414 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 415 | { |
| 416 | struct msgb *msg = gsm48_msgb_alloc(); |
| 417 | struct gsm48_hdr *gh; |
| 418 | |
| 419 | DEBUGP(DMM, "<- GPRS DETACH ACCEPT\n"); |
| 420 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 421 | mmctx2msgid(msg, mm); |
| 422 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 423 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 424 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 425 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 426 | gh->data[0] = force_stby; |
| 427 | |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 428 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 429 | } |
| 430 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 431 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 432 | static int gsm48_tx_gmm_id_req(struct sgsn_mm_ctx *mm, uint8_t id_type) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 433 | { |
| 434 | struct msgb *msg = gsm48_msgb_alloc(); |
| 435 | struct gsm48_hdr *gh; |
| 436 | |
Harald Welte | 96cf248 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 437 | DEBUGP(DMM, "<- GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 438 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 439 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 440 | |
| 441 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 442 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 443 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 444 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 445 | gh->data[0] = id_type & 0xf; |
| 446 | |
Harald Welte | 96cf248 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 447 | return gsm48_gmm_sendmsg(msg, 1, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | /* Check if we can already authorize a subscriber */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 451 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx, |
| 452 | enum gprs_t3350_mode t3350_mode) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 453 | { |
| 454 | if (strlen(ctx->imei) && strlen(ctx->imsi)) { |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 455 | #ifdef PTMSI_ALLOC |
| 456 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 457 | ctx->t3350_mode = t3350_mode; |
| 458 | mmctx_timer_start(ctx, 3350, GSM0408_T3350_SECS); |
| 459 | #endif |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 460 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 461 | return gsm48_tx_gmm_att_ack(ctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 462 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 463 | if (!strlen(ctx->imei)) { |
| 464 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 465 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
| 466 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 467 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 468 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 469 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 470 | if (!strlen(ctx->imsi)) { |
| 471 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 472 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
| 473 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 474 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 475 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 481 | static int gsm48_rx_gmm_id_resp(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 482 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 483 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 484 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 485 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 486 | |
| 487 | gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 488 | DEBUGP(DMM, "-> GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s) ", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 489 | mi_type, mi_string); |
| 490 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 491 | if (!ctx) { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 492 | DEBUGP(DMM, "from unknown TLLI 0x%08x?!?\n", msgb_tlli(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 493 | return -EINVAL; |
| 494 | } |
| 495 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 496 | if (mi_type == ctx->t3370_id_type) |
| 497 | mmctx_timer_stop(ctx, 3370); |
| 498 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 499 | switch (mi_type) { |
| 500 | case GSM_MI_TYPE_IMSI: |
| 501 | /* we already have a mm context with current TLLI, but no |
| 502 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 503 | * this initial context with data from the HLR */ |
| 504 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imei)); |
| 505 | break; |
| 506 | case GSM_MI_TYPE_IMEI: |
| 507 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei)); |
| 508 | break; |
| 509 | case GSM_MI_TYPE_IMEISV: |
| 510 | break; |
| 511 | } |
| 512 | |
| 513 | DEBUGPC(DMM, "\n"); |
| 514 | /* Check if we can let the mobile station enter */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 515 | return gsm48_gmm_authorize(ctx, ctx->t3350_mode); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | /* Section 9.4.1 Attach request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 519 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 520 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 521 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 522 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 523 | uint8_t *cur = gh->data, *msnc, *mi, *old_ra_info, *ms_ra_acc_cap; |
| 524 | uint8_t msnc_len, att_type, mi_len, mi_type, ms_ra_acc_cap_len; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 525 | uint16_t drx_par; |
| 526 | uint32_t tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 527 | char mi_string[GSM48_MI_SIZE]; |
| 528 | struct gprs_ra_id ra_id; |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 529 | uint16_t cid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 530 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 531 | DEBUGP(DMM, "-> GMM ATTACH REQUEST "); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 532 | |
| 533 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 534 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 535 | * or with random TLLI. */ |
| 536 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 537 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 538 | |
| 539 | /* MS network capability 10.5.5.12 */ |
| 540 | msnc_len = *cur++; |
| 541 | msnc = cur; |
| 542 | if (msnc_len > 2) |
| 543 | goto err_inval; |
| 544 | cur += msnc_len; |
| 545 | |
| 546 | /* aTTACH Type 10.5.5.2 */ |
| 547 | att_type = *cur++ & 0x0f; |
| 548 | |
| 549 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 550 | drx_par = *cur++ << 8; |
| 551 | drx_par |= *cur++; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 552 | |
| 553 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 554 | mi_len = *cur++; |
| 555 | mi = cur; |
| 556 | if (mi_len > 8) |
| 557 | goto err_inval; |
| 558 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 559 | cur += mi_len; |
| 560 | |
| 561 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 562 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 563 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 564 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 565 | |
| 566 | /* Old routing area identification 10.5.5.15 */ |
| 567 | old_ra_info = cur; |
| 568 | cur += 6; |
| 569 | |
| 570 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 571 | ms_ra_acc_cap_len = *cur++; |
| 572 | ms_ra_acc_cap = cur; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 573 | |
| 574 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 575 | |
| 576 | switch (mi_type) { |
| 577 | case GSM_MI_TYPE_IMSI: |
| 578 | /* Try to find MM context based on IMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 579 | if (!ctx) |
| 580 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 581 | if (!ctx) { |
| 582 | #if 0 |
| 583 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 584 | #else |
| 585 | /* As a temorary hack, we simply assume that the IMSI exists */ |
| 586 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
| 587 | if (!ctx) |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 588 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_NET_FAIL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 589 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
| 590 | #endif |
| 591 | } |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 592 | ctx->tlli = msgb_tlli(msg); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 593 | ctx->llme = llme; |
Harald Welte | 5c23bfc | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 594 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 595 | break; |
| 596 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 597 | memcpy(&tmsi, mi+1, 4); |
| 598 | tmsi = ntohl(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 599 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 600 | if (!ctx) |
| 601 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 602 | if (!ctx) { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 603 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 604 | ctx->p_tmsi = tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 605 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 606 | ctx->tlli = msgb_tlli(msg); |
| 607 | ctx->llme = llme; |
| 608 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 609 | break; |
| 610 | default: |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 611 | LOGP(DMM, LOGL_NOTICE, "Rejecting ATTACH REQUEST with " |
| 612 | "MI type %u\n", mi_type); |
| 613 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 614 | } |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 615 | /* Update MM Context with currient RA and Cell ID */ |
| 616 | ctx->ra = ra_id; |
| 617 | ctx->cell_id = cid; |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 618 | /* Update MM Context with other data */ |
| 619 | ctx->drx_parms = drx_par; |
| 620 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
| 621 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, ms_ra_acc_cap_len); |
| 622 | ctx->ms_network_capa.len = msnc_len; |
| 623 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
| 624 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 625 | #ifdef PTMSI_ALLOC |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 626 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 627 | ctx->p_tmsi_old = ctx->p_tmsi; |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 628 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 629 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 630 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 631 | * foreign TLLI to local TLLI */ |
| 632 | ctx->tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 633 | |
| 634 | /* Inform LLC layer about new TLLI but keep old active */ |
| 635 | gprs_llgmm_assign(ctx->llme, ctx->tlli, ctx->tlli_new, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 636 | |
| 637 | DEBUGPC(DMM, "\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 638 | return ctx ? gsm48_gmm_authorize(ctx, GMM_T3350_MODE_ATT) : 0; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 639 | |
| 640 | err_inval: |
| 641 | DEBUGPC(DMM, "\n"); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 642 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_SEM_INCORR_MSG); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 643 | } |
| 644 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 645 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 646 | static int gsm48_rx_gmm_det_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 647 | { |
| 648 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | e25385b | 2010-06-28 19:11:41 +0200 | [diff] [blame] | 649 | struct sgsn_pdp_ctx *pdp, *pdp2; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 650 | uint8_t detach_type, power_off; |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 651 | int rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 652 | |
| 653 | detach_type = gh->data[0] & 0x7; |
| 654 | power_off = gh->data[0] & 0x8; |
| 655 | |
| 656 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
| 657 | |
| 658 | DEBUGP(DMM, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", |
| 659 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 660 | power_off ? "Power-off" : ""); |
| 661 | |
| 662 | /* Mark MM state as deregistered */ |
| 663 | ctx->mm_state = GMM_DEREGISTERED; |
| 664 | |
Harald Welte | e25385b | 2010-06-28 19:11:41 +0200 | [diff] [blame] | 665 | /* delete all existing PDP contexts for this MS */ |
| 666 | llist_for_each_entry_safe(pdp, pdp2, &ctx->pdp_list, list) { |
| 667 | LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u " |
| 668 | "due to GPRS DETACH REQUEST\n", pdp->nsapi); |
| 669 | sgsn_delete_pdp_ctx(pdp); |
| 670 | /* FIXME: the callback wants to transmit a DEACT PDP CTX ACK, |
| 671 | * which is quite stupid for a MS that has just detached.. */ |
| 672 | } |
| 673 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 674 | /* force_stby = 0 */ |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 675 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 676 | |
| 677 | /* TLLI unassignment */ |
| 678 | gprs_llgmm_assign(ctx->llme, ctx->tlli, 0xffffffff, 0, NULL); |
| 679 | |
| 680 | return rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 681 | } |
| 682 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 683 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 684 | static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 685 | { |
| 686 | struct msgb *msg = gsm48_msgb_alloc(); |
| 687 | struct gsm48_hdr *gh; |
| 688 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 689 | uint8_t *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 690 | |
| 691 | DEBUGP(DMM, "<- ROUTING AREA UPDATE ACCEPT\n"); |
| 692 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 693 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 694 | |
| 695 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 696 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 697 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 698 | |
| 699 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 700 | rua->force_stby = 0; /* not indicated */ |
| 701 | rua->upd_result = 0; /* RA updated */ |
| 702 | rua->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 703 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 704 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 705 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 706 | #if 0 |
| 707 | /* Optional: P-TMSI signature */ |
| 708 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 709 | ptsig = msgb_put(msg, 3); |
| 710 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 711 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 712 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 713 | #endif |
| 714 | |
| 715 | #ifdef PTMSI_ALLOC |
| 716 | /* Optional: Allocated P-TMSI */ |
| 717 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 718 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 719 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 720 | #endif |
| 721 | |
| 722 | /* Option: MS ID, ... */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 723 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 727 | static int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 728 | { |
| 729 | struct msgb *msg = gsm48_msgb_alloc(); |
| 730 | struct gsm48_hdr *gh; |
| 731 | |
| 732 | DEBUGP(DMM, "<- ROUTING AREA UPDATE REJECT\n"); |
| 733 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 734 | gmm_copy_id(msg, old_msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 735 | |
| 736 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 737 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 738 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 739 | gh->data[0] = cause; |
| 740 | gh->data[1] = 0; /* ? */ |
| 741 | |
| 742 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 743 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 744 | } |
| 745 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 746 | static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, |
| 747 | uint16_t pdp_status) |
| 748 | { |
| 749 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 750 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 751 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 752 | * shall deactivate all those PDP contexts locally (without peer to |
| 753 | * peer signalling between the MS and the network), which are not in SM |
| 754 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 755 | * being in state PDP-INACTIVE. */ |
| 756 | |
| 757 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
| 758 | if (!(pdp_status & (1 << pdp->nsapi))) { |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 759 | LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u " |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 760 | "due to PDP CTX STATUS IE= 0x%04x\n", |
| 761 | pdp->nsapi, pdp_status); |
| 762 | sgsn_delete_pdp_ctx(pdp); |
| 763 | } |
| 764 | } |
| 765 | } |
| 766 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 767 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 768 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 769 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 770 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 771 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 772 | uint8_t *cur = gh->data; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 773 | uint8_t *ms_ra_acc_cap; |
| 774 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 775 | struct gprs_ra_id old_ra_id; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 776 | struct tlv_parsed tp; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 777 | uint8_t upd_type; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 778 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 779 | |
| 780 | /* Update Type 10.5.5.18 */ |
| 781 | upd_type = *cur++ & 0x0f; |
| 782 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 783 | DEBUGP(DMM, "-> GMM RA UPDATE REQUEST type=\"%s\" ", |
| 784 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 785 | |
| 786 | /* Old routing area identification 10.5.5.15 */ |
| 787 | gsm48_parse_ra(&old_ra_id, cur); |
| 788 | cur += 6; |
| 789 | |
| 790 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 791 | ms_ra_acc_cap_len = *cur++; |
| 792 | ms_ra_acc_cap = cur; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 793 | |
| 794 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 795 | * DRX parameter, MS network capability */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 796 | rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
| 797 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 798 | |
| 799 | switch (upd_type) { |
| 800 | case GPRS_UPD_T_RA_LA: |
| 801 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
| 802 | DEBUGPC(DMM, " unsupported in Mode III, is your SI13 corrupt?\n"); |
| 803 | return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_PROTO_ERR_UNSPEC); |
| 804 | break; |
| 805 | case GPRS_UPD_T_RA: |
| 806 | case GPRS_UPD_T_PERIODIC: |
| 807 | break; |
| 808 | } |
| 809 | |
| 810 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 811 | if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) { |
| 812 | /* The MS has to perform GPRS attach */ |
| 813 | DEBUGPC(DMM, " REJECT\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 814 | /* Device is still IMSI atached for CS but initiate GPRS ATTACH */ |
| 815 | return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 816 | } |
| 817 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 818 | /* Update the MM context with the new RA-ID */ |
| 819 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
| 820 | /* Update the MM context with the new TLLI */ |
| 821 | mmctx->tlli = msgb_tlli(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 822 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 823 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 824 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 825 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 826 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 827 | DEBUGPC(DMM, " ACCEPT\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 828 | #ifdef PTMSI_ALLOC |
| 829 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 830 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 831 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 832 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
| 833 | mmctx_timer_start(mmctx, 3350, GSM0408_T3350_SECS); |
| 834 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 835 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 836 | * foreign TLLI to local TLLI */ |
| 837 | mmctx->tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 838 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 839 | /* Inform LLC layer about new TLLI but keep old active */ |
| 840 | gprs_llgmm_assign(mmctx->llme, mmctx->tlli, mmctx->tlli_new, 0, NULL); |
| 841 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 842 | /* Look at PDP Context Status IE and see if MS's view of |
| 843 | * activated/deactivated NSAPIs agrees with our view */ |
| 844 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
| 845 | uint16_t pdp_status = ntohs(*(uint16_t *) |
| 846 | TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)); |
| 847 | process_ms_ctx_status(mmctx, pdp_status); |
| 848 | } |
| 849 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 850 | /* Send RA UPDATE ACCEPT */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 851 | return gsm48_tx_gmm_ra_upd_ack(mmctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 852 | } |
| 853 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 854 | static int gsm48_rx_gmm_status(struct sgsn_mm_ctx *mmctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 855 | { |
| 856 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 857 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 858 | DEBUGP(DMM, "-> GPRS MM STATUS (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 859 | get_value_string(gmm_cause_names, gh->data[0])); |
| 860 | |
| 861 | return 0; |
| 862 | } |
| 863 | |
| 864 | /* GPRS Mobility Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 865 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 866 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 867 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 868 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 869 | int rc; |
| 870 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 871 | /* MMCTX can be NULL when called */ |
| 872 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 873 | if (!mmctx && |
| 874 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 875 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 876 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 877 | return gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 878 | } |
| 879 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 880 | switch (gh->msg_type) { |
| 881 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 882 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 883 | break; |
| 884 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 885 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 886 | break; |
| 887 | case GSM48_MT_GMM_ID_RESP: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 888 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 889 | break; |
| 890 | case GSM48_MT_GMM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 891 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 892 | break; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 893 | case GSM48_MT_GMM_DETACH_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 894 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 895 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 896 | case GSM48_MT_GMM_ATTACH_COMPL: |
| 897 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 898 | DEBUGP(DMM, "-> ATTACH COMPLETE\n"); |
| 899 | mmctx_timer_stop(mmctx, 3350); |
| 900 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 901 | /* Unassign the old TLLI */ |
| 902 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | b3d84a4 | 2010-07-01 11:54:31 +0200 | [diff] [blame] | 903 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli, 0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 904 | break; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 905 | case GSM48_MT_GMM_RA_UPD_COMPL: |
| 906 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 907 | DEBUGP(DMM, "-> ROUTEING AREA UPDATE COMPLETE\n"); |
| 908 | mmctx_timer_stop(mmctx, 3350); |
| 909 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 910 | /* Unassign the old TLLI */ |
| 911 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | b3d84a4 | 2010-07-01 11:54:31 +0200 | [diff] [blame] | 912 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli, 0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 913 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 914 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 915 | DEBUGP(DMM, "-> PTMSI REALLLICATION COMPLETE\n"); |
| 916 | mmctx_timer_stop(mmctx, 3350); |
| 917 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 918 | /* Unassign the old TLLI */ |
| 919 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | b3d84a4 | 2010-07-01 11:54:31 +0200 | [diff] [blame] | 920 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli, 0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 921 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 922 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
| 923 | DEBUGP(DMM, "Unimplemented GSM 04.08 GMM msg type 0x%02x\n", |
| 924 | gh->msg_type); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 925 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 926 | break; |
| 927 | default: |
| 928 | DEBUGP(DMM, "Unknown GSM 04.08 GMM msg type 0x%02x\n", |
| 929 | gh->msg_type); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 930 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 931 | break; |
| 932 | } |
| 933 | |
| 934 | return rc; |
| 935 | } |
| 936 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 937 | static void mmctx_timer_cb(void *_mm) |
| 938 | { |
| 939 | struct sgsn_mm_ctx *mm = _mm; |
| 940 | |
| 941 | mm->num_T_exp++; |
| 942 | |
| 943 | switch (mm->T) { |
| 944 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 945 | if (mm->num_T_exp >= 5) { |
| 946 | LOGP(DMM, LOGL_NOTICE, "T3350 expired >= 5 times\n"); |
| 947 | mm->mm_state = GMM_DEREGISTERED; |
| 948 | /* FIXME: should we return some error? */ |
| 949 | break; |
| 950 | } |
| 951 | /* re-transmit the respective msg and re-start timer */ |
| 952 | switch (mm->t3350_mode) { |
| 953 | case GMM_T3350_MODE_ATT: |
| 954 | gsm48_tx_gmm_att_ack(mm); |
| 955 | break; |
| 956 | case GMM_T3350_MODE_RAU: |
| 957 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 958 | break; |
| 959 | case GMM_T3350_MODE_PTMSI_REALL: |
| 960 | /* FIXME */ |
| 961 | break; |
| 962 | } |
| 963 | bsc_schedule_timer(&mm->timer, GSM0408_T3350_SECS, 0); |
| 964 | break; |
| 965 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 966 | if (mm->num_T_exp >= 5) { |
| 967 | LOGP(DMM, LOGL_NOTICE, "T3370 expired >= 5 times\n"); |
| 968 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
| 969 | mm->mm_state = GMM_DEREGISTERED; |
| 970 | break; |
| 971 | } |
| 972 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 973 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
| 974 | bsc_schedule_timer(&mm->timer, GSM0408_T3370_SECS, 0); |
| 975 | break; |
| 976 | default: |
| 977 | LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n", |
| 978 | mm->T); |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | /* GPRS SESSION MANAGEMENT */ |
| 983 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 984 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 985 | { |
| 986 | uint8_t v[6]; |
| 987 | |
| 988 | v[0] = PDP_TYPE_ORG_IETF; |
| 989 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 990 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 991 | |
| 992 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 993 | } |
| 994 | |
| 995 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 996 | { |
| 997 | uint8_t v[2]; |
| 998 | |
| 999 | v[0] = PDP_TYPE_ORG_ETSI; |
| 1000 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 1001 | |
| 1002 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1003 | } |
| 1004 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1005 | /* Section 9.5.2: Ativate PDP Context Accept */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1006 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1007 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1008 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1009 | struct gsm48_hdr *gh; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1010 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1011 | |
| 1012 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT ACK\n"); |
| 1013 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1014 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1015 | |
| 1016 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1017 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1018 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1019 | |
| 1020 | /* Negotiated LLC SAPI */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1021 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1022 | |
Harald Welte | 540dcbc | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 1023 | /* FIXME: copy QoS parameters from original request */ |
| 1024 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 1025 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1026 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1027 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1028 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1029 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1030 | /* PDP address */ |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1031 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 1032 | * the IE is identical with the 04.08 PDP Address IE */ |
| 1033 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1034 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 1035 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1036 | pdp->lib->eua.v[0] |= 0xf0; |
| 1037 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1038 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
| 1039 | if (pdp->lib->pco_req.l && pdp->lib->pco_req.v) |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1040 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | f2d6658 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 1041 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1042 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1043 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1044 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1045 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1046 | } |
| 1047 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1048 | /* Section 9.5.3: Activate PDP Context reject */ |
| 1049 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1050 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 1051 | { |
| 1052 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1053 | struct gsm48_hdr *gh; |
| 1054 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1055 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1056 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1057 | |
| 1058 | mmctx2msgid(msg, mm); |
| 1059 | |
| 1060 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1061 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1062 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 1063 | |
| 1064 | msgb_v_put(msg, cause); |
| 1065 | if (pco_len && pco_v) |
| 1066 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 1067 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1068 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1069 | } |
| 1070 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1071 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1072 | static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1073 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1074 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1075 | struct gsm48_hdr *gh; |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1076 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1077 | |
| 1078 | DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
| 1079 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1080 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1081 | |
| 1082 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1083 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1084 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 1085 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1086 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1087 | } |
| 1088 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 1089 | { |
| 1090 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | /* Section 9.5.1: Activate PDP Context Request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1094 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 1095 | struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1096 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1097 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1098 | struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data; |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1099 | uint8_t req_qos_len, req_pdpa_len; |
| 1100 | uint8_t *req_qos, *req_pdpa; |
| 1101 | struct tlv_parsed tp; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1102 | uint8_t transaction_id = (gh->proto_discr >> 4); |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1103 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1104 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1105 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1106 | DEBUGP(DMM, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
| 1107 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1108 | |
Harald Welte | b7b0fd7 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1109 | /* FIXME: length checks! */ |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1110 | req_qos_len = act_req->data[0]; |
| 1111 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 1112 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 1113 | req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1114 | |
Harald Welte | b7b0fd7 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1115 | /* Optional: Access Point Name, Protocol Config Options */ |
| 1116 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 1117 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 1118 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 1119 | else |
| 1120 | memset(&tp, 0, sizeof(tp)); |
| 1121 | |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1122 | switch (req_pdpa[0] & 0xf) { |
| 1123 | case 0x0: |
| 1124 | DEBUGPC(DMM, "ETSI "); |
| 1125 | break; |
| 1126 | case 0x1: |
| 1127 | DEBUGPC(DMM, "IETF "); |
| 1128 | break; |
| 1129 | case 0xf: |
| 1130 | DEBUGPC(DMM, "Empty "); |
| 1131 | break; |
| 1132 | } |
| 1133 | |
| 1134 | switch (req_pdpa[1]) { |
| 1135 | case 0x21: |
| 1136 | DEBUGPC(DMM, "IPv4 "); |
| 1137 | if (req_pdpa_len >= 6) { |
| 1138 | struct in_addr ia; |
| 1139 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 1140 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 1141 | } |
| 1142 | break; |
| 1143 | case 0x57: |
| 1144 | DEBUGPC(DMM, "IPv6 "); |
| 1145 | if (req_pdpa_len >= 18) { |
| 1146 | /* FIXME: print IPv6 address */ |
| 1147 | } |
| 1148 | break; |
| 1149 | default: |
| 1150 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 1151 | break; |
| 1152 | } |
| 1153 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1154 | DEBUGPC(DMM, "\n"); |
| 1155 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1156 | /* put the non-TLV elements in the TLV parser structure to |
| 1157 | * pass them on to the SGSN / GTP code */ |
| 1158 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 1159 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 1160 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 1161 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 1162 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1163 | /* FIXME: determine GGSN based on APN and subscription options */ |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1164 | if (TLVP_PRESENT(&tp, GSM48_IE_GSM_APN)) {} |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1165 | |
| 1166 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 1167 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 1168 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 1169 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1170 | GSM_CAUSE_INV_MAND_INFO, |
| 1171 | 0, NULL); |
| 1172 | } |
| 1173 | |
| 1174 | /* Check if NSAPI is already in use */ |
Harald Welte | 5fbac98 | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 1175 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 1176 | if (pdp) { |
| 1177 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 1178 | if (pdp->sapi == act_req->req_llc_sapi && |
| 1179 | pdp->ti == transaction_id) { |
| 1180 | /* This apparently is a re-transmission of a PDP CTX |
| 1181 | * ACT REQ (our ACT ACK must have got dropped) */ |
| 1182 | return gsm48_tx_gsm_act_pdp_acc(pdp); |
| 1183 | } |
| 1184 | |
| 1185 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1186 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1187 | GSM_CAUSE_NSAPI_IN_USE, |
| 1188 | 0, NULL); |
| 1189 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1190 | |
Harald Welte | a456a23 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 1191 | /* Only increment counter for a real activation, after we checked |
| 1192 | * for re-transmissions */ |
| 1193 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 1194 | |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1195 | ggsn = sgsn_ggsn_ctx_by_id(0); |
| 1196 | if (!ggsn) { |
| 1197 | LOGP(DGPRS, LOGL_ERROR, "No GGSN context 0 found!\n"); |
| 1198 | return -EIO; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1199 | } |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1200 | ggsn->gsn = sgsn->gsn; |
| 1201 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, act_req->req_nsapi, &tp); |
| 1202 | if (!pdp) |
| 1203 | return -1; |
| 1204 | |
| 1205 | /* Store SAPI and Transaction Identifier */ |
| 1206 | pdp->sapi = act_req->req_llc_sapi; |
| 1207 | pdp->ti = transaction_id; |
| 1208 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1209 | return 0; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1210 | } |
| 1211 | |
| 1212 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1213 | static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1214 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1215 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1216 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1217 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1218 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1219 | DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1220 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1221 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1222 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1223 | if (!pdp) { |
| 1224 | LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Request for " |
| 1225 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1226 | mm->imsi, transaction_id); |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1227 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1228 | } |
| 1229 | |
| 1230 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1231 | } |
| 1232 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1233 | static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1234 | { |
| 1235 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1236 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1237 | DEBUGP(DMM, "-> GPRS SM STATUS (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1238 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1239 | |
| 1240 | return 0; |
| 1241 | } |
| 1242 | |
| 1243 | /* GPRS Session Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1244 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1245 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1246 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1247 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1248 | int rc; |
| 1249 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1250 | /* MMCTX can be NULL when called */ |
| 1251 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1252 | if (!mmctx) { |
| 1253 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Harald Welte | ef7157f | 2010-07-02 16:18:18 +0200 | [diff] [blame] | 1254 | gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_IMPL_DETACHED); |
| 1255 | return gsm48_tx_sm_status_oldmsg(msg, GSM_CAUSE_PROTO_ERR_UNSPEC); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1256 | } |
| 1257 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1258 | switch (gh->msg_type) { |
| 1259 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1260 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1261 | break; |
| 1262 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1263 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1264 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1265 | case GSM48_MT_GSM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1266 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1267 | break; |
| 1268 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 1269 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 1270 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
| 1271 | DEBUGP(DMM, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n", |
| 1272 | gh->msg_type); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1273 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1274 | break; |
| 1275 | default: |
| 1276 | DEBUGP(DMM, "Unknown GSM 04.08 GSM msg type 0x%02x\n", |
| 1277 | gh->msg_type); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1278 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1279 | break; |
| 1280 | |
| 1281 | } |
| 1282 | |
| 1283 | return rc; |
| 1284 | } |
| 1285 | |
| 1286 | /* Main entry point for incoming 04.08 GPRS messages */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1287 | int gsm0408_gprs_rcvmsg(struct msgb *msg, struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1288 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1289 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1290 | uint8_t pdisc = gh->proto_discr & 0x0f; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1291 | struct sgsn_mm_ctx *mmctx; |
| 1292 | struct gprs_ra_id ra_id; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1293 | int rc = -EINVAL; |
| 1294 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1295 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 1296 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1297 | if (mmctx) { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1298 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1299 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1300 | mmctx->llme = llme; |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1301 | } |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1302 | |
| 1303 | /* MMCTX can be NULL */ |
| 1304 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1305 | switch (pdisc) { |
| 1306 | case GSM48_PDISC_MM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1307 | rc = gsm0408_rcv_gmm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1308 | break; |
| 1309 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1310 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1311 | break; |
| 1312 | default: |
| 1313 | DEBUGP(DMM, "Unknown GSM 04.08 discriminator 0x%02x\n", |
| 1314 | pdisc); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1315 | /* FIXME: return status message */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1316 | break; |
| 1317 | } |
| 1318 | |
| 1319 | return rc; |
| 1320 | } |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1321 | |
| 1322 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 1323 | { |
| 1324 | struct sgsn_mm_ctx *mmctx; |
| 1325 | |
| 1326 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1327 | if (!mmctx) { |
| 1328 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 1329 | "TLLI=%08x\n", tlli); |
| 1330 | return -EINVAL; |
| 1331 | } |
| 1332 | |
| 1333 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL) { |
| 1334 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request while state " |
| 1335 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 1336 | return -EINVAL; |
| 1337 | } |
| 1338 | |
| 1339 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
| 1340 | mmctx->mm_state = GMM_REGISTERED_SUSPENDED; |
| 1341 | return 0; |
| 1342 | } |
| 1343 | |
| 1344 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 1345 | uint8_t suspend_ref) |
| 1346 | { |
| 1347 | struct sgsn_mm_ctx *mmctx; |
| 1348 | |
| 1349 | /* FIXME: make use of suspend reference? */ |
| 1350 | |
| 1351 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1352 | if (!mmctx) { |
| 1353 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 1354 | "TLLI=%08x\n", tlli); |
| 1355 | return -EINVAL; |
| 1356 | } |
| 1357 | |
| 1358 | if (mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
| 1359 | LOGP(DMM, LOGL_NOTICE, "RESUME request while state " |
| 1360 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 1361 | /* FIXME: should we not simply ignore it? */ |
| 1362 | return -EINVAL; |
| 1363 | } |
| 1364 | |
| 1365 | /* Transition from SUSPENDED to NORMAL */ |
| 1366 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
| 1367 | return 0; |
| 1368 | } |