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 |
| 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 | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 28 | #include <stdint.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 29 | #include <errno.h> |
| 30 | |
| 31 | #include <netinet/in.h> |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 32 | #include <arpa/inet.h> |
Harald Welte | 9b455bf | 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 | d605709 | 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 | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 40 | #include <osmocore/rate_ctr.h> |
Harald Welte | d605709 | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 41 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 42 | #include <openbsc/debug.h> |
| 43 | #include <openbsc/gsm_data.h> |
Harald Welte | 9b455bf | 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 | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 48 | #include <openbsc/transaction.h> |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 49 | #include <openbsc/gprs_bssgp.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 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> |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 53 | #include <openbsc/sgsn.h> |
| 54 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 55 | #include <pdp.h> |
| 56 | |
Harald Welte | c2e8cc4 | 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 | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 70 | /* Section 11.3 / Table 11.2d Timers of Session Management - network side */ |
| 71 | #define GSM0408_T3385_SECS 8 /* wait for ACT PDP CTX REQ */ |
| 72 | #define GSM0408_T3386_SECS 8 /* wait for MODIFY PDP CTX ACK */ |
| 73 | #define GSM0408_T3395_SECS 8 /* wait for DEACT PDP CTX ACK */ |
| 74 | #define GSM0408_T3397_SECS 8 /* wait for DEACT AA PDP CTX ACK */ |
| 75 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 76 | extern struct sgsn_instance *sgsn; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 77 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 78 | /* Protocol related stuff, should go into libosmocore */ |
| 79 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 80 | /* 10.5.5.14 GPRS MM Cause / Table 10.5.147 */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 81 | const struct value_string gmm_cause_names[] = { |
Harald Welte | fd29a1f | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 82 | { GMM_CAUSE_IMSI_UNKNOWN, "IMSI unknown in HLR" }, |
| 83 | { GMM_CAUSE_ILLEGAL_MS, "Illegal MS" }, |
| 84 | { GMM_CAUSE_ILLEGAL_ME, "Illegal ME" }, |
| 85 | { GMM_CAUSE_GPRS_NOTALLOWED, "GPRS services not allowed" }, |
| 86 | { GMM_CAUSE_GPRS_OTHER_NOTALLOWED, |
| 87 | "GPRS services and non-GPRS services not allowed" }, |
| 88 | { GMM_CAUSE_MS_ID_NOT_DERIVED, |
| 89 | "MS identity cannot be derived by the network" }, |
| 90 | { GMM_CAUSE_IMPL_DETACHED, "Implicitly detached" }, |
| 91 | { GMM_CAUSE_PLMN_NOTALLOWED, "PLMN not allowed" }, |
| 92 | { GMM_CAUSE_LA_NOTALLOWED, "Location Area not allowed" }, |
| 93 | { GMM_CAUSE_ROAMING_NOTALLOWED, |
| 94 | "Roaming not allowed in this location area" }, |
| 95 | { GMM_CAUSE_NO_GPRS_PLMN, |
| 96 | "GPRS services not allowed in this PLMN" }, |
| 97 | { GMM_CAUSE_MSC_TEMP_NOTREACH, "MSC temporarily not reachable" }, |
| 98 | { GMM_CAUSE_NET_FAIL, "Network failure" }, |
| 99 | { GMM_CAUSE_CONGESTION, "Congestion" }, |
| 100 | { GMM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 101 | { GMM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 102 | { GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 103 | "Message type non-existant or not implemented" }, |
| 104 | { GMM_CAUSE_MSGT_INCOMP_P_STATE, |
| 105 | "Message type not compatible with protocol state" }, |
| 106 | { GMM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 107 | "Information element non-existent or not implemented" }, |
Harald Welte | fd29a1f | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 108 | { GMM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 109 | { GMM_CAUSE_MSG_INCOMP_P_STATE, |
| 110 | "Message not compatible with protocol state " }, |
Harald Welte | fd29a1f | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 111 | { GMM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 112 | { 0, NULL } |
| 113 | }; |
| 114 | |
| 115 | /* 10.5.6.6 SM Cause / Table 10.5.157 */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 116 | const struct value_string gsm_cause_names[] = { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 117 | { GSM_CAUSE_INSUFF_RSRC, "Insufficient resources" }, |
| 118 | { GSM_CAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 119 | { GSM_CAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 120 | { GSM_CAUSE_AUTH_FAILED, "User Authentication failed" }, |
| 121 | { GSM_CAUSE_ACT_REJ_GGSN, "Activation rejected by GGSN" }, |
| 122 | { GSM_CAUSE_ACT_REJ_UNSPEC, "Activation rejected, unspecified" }, |
| 123 | { GSM_CAUSE_SERV_OPT_NOTSUPP, "Service option not supported" }, |
| 124 | { GSM_CAUSE_REQ_SERV_OPT_NOTSUB, |
| 125 | "Requested service option not subscribed" }, |
| 126 | { GSM_CAUSE_SERV_OPT_TEMP_OOO, |
| 127 | "Service option temporarily out of order" }, |
| 128 | { GSM_CAUSE_NSAPI_IN_USE, "NSAPI already used" }, |
| 129 | { GSM_CAUSE_DEACT_REGULAR, "Regular deactivation" }, |
| 130 | { GSM_CAUSE_QOS_NOT_ACCEPTED, "QoS not accepted" }, |
| 131 | { GSM_CAUSE_NET_FAIL, "Network Failure" }, |
| 132 | { GSM_CAUSE_REACT_RQD, "Reactivation required" }, |
| 133 | { GSM_CAUSE_FEATURE_NOTSUPP, "Feature not supported " }, |
| 134 | { GSM_CAUSE_INVALID_TRANS_ID, "Invalid transaction identifier" }, |
| 135 | { GSM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
| 136 | { GSM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 137 | { GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 138 | "Message type non-existant or not implemented" }, |
| 139 | { GSM_CAUSE_MSGT_INCOMP_P_STATE, |
| 140 | "Message type not compatible with protocol state" }, |
| 141 | { GSM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 142 | "Information element non-existent or not implemented" }, |
| 143 | { GSM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
| 144 | { GSM_CAUSE_MSG_INCOMP_P_STATE, |
| 145 | "Message not compatible with protocol state " }, |
| 146 | { GSM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
| 147 | { 0, NULL } |
| 148 | }; |
| 149 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 150 | /* 10.5.5.2 */ |
| 151 | const struct value_string gprs_att_t_strs[] = { |
| 152 | { GPRS_ATT_T_ATTACH, "GPRS attach" }, |
| 153 | { GPRS_ATT_T_ATT_WHILE_IMSI, "GPRS attach while IMSI attached" }, |
| 154 | { GPRS_ATT_T_COMBINED, "Combined GPRS/IMSI attach" }, |
| 155 | { 0, NULL } |
| 156 | }; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 157 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 158 | const struct value_string gprs_upd_t_strs[] = { |
| 159 | { GPRS_UPD_T_RA, "RA updating" }, |
| 160 | { GPRS_UPD_T_RA_LA, "combined RA/LA updating" }, |
| 161 | { GPRS_UPD_T_RA_LA_IMSI_ATT, "combined RA/LA updating + IMSI attach" }, |
| 162 | { GPRS_UPD_T_PERIODIC, "periodic updating" }, |
| 163 | { 0, NULL } |
| 164 | }; |
| 165 | |
| 166 | /* 10.5.5.5 */ |
| 167 | const struct value_string gprs_det_t_mo_strs[] = { |
| 168 | { GPRS_DET_T_MO_GPRS, "GPRS detach" }, |
| 169 | { GPRS_DET_T_MO_IMSI, "IMSI detach" }, |
| 170 | { GPRS_DET_T_MO_COMBINED, "Combined GPRS/IMSI detach" }, |
| 171 | { 0, NULL } |
| 172 | }; |
| 173 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 174 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 175 | .def = { |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 176 | [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 177 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 178 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 179 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_FIXED, 3 }, |
| 180 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_FIXED, 16 }, |
| 181 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 182 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 183 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 184 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 185 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 186 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 187 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 188 | }, |
| 189 | }; |
| 190 | |
| 191 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 192 | .def = { |
| 193 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 194 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 195 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 196 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 197 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 198 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 199 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, |
| 200 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 201 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 202 | }, |
| 203 | }; |
| 204 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 205 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 206 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 207 | static void mmctx_timer_cb(void *_mm); |
| 208 | |
| 209 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 210 | unsigned int seconds) |
| 211 | { |
| 212 | if (bsc_timer_pending(&mm->timer)) |
| 213 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 214 | "timer %u pending\n", T, mm->T); |
| 215 | mm->T = T; |
| 216 | mm->num_T_exp = 0; |
| 217 | |
| 218 | /* FIXME: we should do this only once ? */ |
| 219 | mm->timer.data = mm; |
| 220 | mm->timer.cb = &mmctx_timer_cb; |
| 221 | |
| 222 | bsc_schedule_timer(&mm->timer, seconds, 0); |
| 223 | } |
| 224 | |
| 225 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 226 | { |
| 227 | if (mm->T != T) |
| 228 | LOGP(DMM, LOGL_ERROR, "Stopping MM timer %u but " |
| 229 | "%u is running\n", T, mm->T); |
| 230 | bsc_del_timer(&mm->timer); |
| 231 | } |
| 232 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 233 | /* Send a message through the underlying layer */ |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 234 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
| 235 | const struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 236 | { |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 237 | if (mm) |
| 238 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
| 239 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 240 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 241 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 242 | } |
| 243 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 244 | /* copy identifiers from old message to new message, this |
| 245 | * is required so lower layers can route it correctly */ |
| 246 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 247 | { |
| 248 | msgb_tlli(msg) = msgb_tlli(old); |
| 249 | msgb_bvci(msg) = msgb_bvci(old); |
| 250 | msgb_nsei(msg) = msgb_nsei(old); |
| 251 | } |
| 252 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 253 | /* Store BVCI/NSEI in MM context */ |
| 254 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 255 | { |
| 256 | mm->bvci = msgb_bvci(msg); |
| 257 | mm->nsei = msgb_nsei(msg); |
| 258 | } |
| 259 | |
| 260 | /* Store BVCI/NSEI in MM context */ |
| 261 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 262 | { |
| 263 | msgb_tlli(msg) = mm->tlli; |
| 264 | msgb_bvci(msg) = mm->bvci; |
| 265 | msgb_nsei(msg) = mm->nsei; |
| 266 | } |
| 267 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 268 | /* Chapter 9.4.18 */ |
| 269 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 270 | struct sgsn_mm_ctx *mmctx, int sm) |
| 271 | { |
| 272 | struct gsm48_hdr *gh; |
| 273 | |
| 274 | /* MMCTX might be NULL! */ |
| 275 | |
| 276 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
| 277 | get_value_string(gmm_cause_names, cause)); |
| 278 | |
| 279 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 280 | if (sm) { |
| 281 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 282 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 283 | } else { |
| 284 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 285 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 286 | } |
| 287 | gh->data[0] = cause; |
| 288 | |
| 289 | return gsm48_gmm_sendmsg(msg, 0, mmctx); |
| 290 | } |
| 291 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 292 | { |
| 293 | struct msgb *msg = gsm48_msgb_alloc(); |
| 294 | |
| 295 | mmctx2msgid(msg, mmctx); |
| 296 | return _tx_status(msg, cause, mmctx, 0); |
| 297 | }; |
| 298 | static int gsm48_tx_gmm_status_oldmsg(struct msgb *oldmsg, uint8_t cause) |
| 299 | { |
| 300 | struct msgb *msg = gsm48_msgb_alloc(); |
| 301 | |
| 302 | gmm_copy_id(msg, oldmsg); |
| 303 | return _tx_status(msg, cause, NULL, 0); |
| 304 | } |
| 305 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 306 | { |
| 307 | struct msgb *msg = gsm48_msgb_alloc(); |
| 308 | |
| 309 | mmctx2msgid(msg, mmctx); |
| 310 | return _tx_status(msg, cause, mmctx, 1); |
| 311 | }; |
| 312 | static int gsm48_tx_sm_status_oldmsg(struct msgb *oldmsg, uint8_t cause) |
| 313 | { |
| 314 | struct msgb *msg = gsm48_msgb_alloc(); |
| 315 | |
| 316 | gmm_copy_id(msg, oldmsg); |
| 317 | return _tx_status(msg, cause, NULL, 1); |
| 318 | } |
| 319 | |
| 320 | |
Harald Welte | 86fda90 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 321 | static struct gsm48_qos default_qos = { |
| 322 | .delay_class = 4, /* best effort */ |
| 323 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 324 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 325 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 326 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 327 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 328 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 329 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 330 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 331 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 332 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 333 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 334 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 335 | .handling_prio = 3, |
| 336 | .xfer_delay = 0x10, /* 200ms */ |
| 337 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 338 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 339 | .sig_ind = 0, /* not optimised for signalling */ |
| 340 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 341 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 342 | }; |
| 343 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 344 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 345 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 346 | { |
| 347 | struct msgb *msg = gsm48_msgb_alloc(); |
| 348 | struct gsm48_hdr *gh; |
| 349 | struct gsm48_attach_ack *aa; |
Harald Welte | cd4dd4d | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 350 | uint8_t *ptsig, *mid; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 351 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 352 | DEBUGP(DMM, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 353 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 354 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 355 | |
| 356 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 357 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 358 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 359 | |
| 360 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 361 | aa->force_stby = 0; /* not indicated */ |
| 362 | aa->att_result = 1; /* GPRS only */ |
| 363 | aa->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
| 364 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 365 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 366 | |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 367 | #if 0 |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 368 | /* Optional: P-TMSI signature */ |
| 369 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 370 | ptsig = msgb_put(msg, 3); |
| 371 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 372 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 373 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 374 | |
| 375 | /* Optional: Negotiated Ready timer value */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 376 | #endif |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 377 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 378 | #ifdef PTMSI_ALLOC |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 379 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 380 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 381 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 382 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 383 | #endif |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 384 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 385 | /* Optional: MS-identity (combined attach) */ |
| 386 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 387 | |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 388 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 392 | 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] | 393 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 394 | struct gsm48_hdr *gh; |
| 395 | |
| 396 | DEBUGP(DMM, "<- GPRS ATTACH REJECT\n"); |
| 397 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 398 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 399 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 400 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 401 | gh->data[0] = gmm_cause; |
| 402 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 403 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 404 | } |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 405 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 406 | uint8_t gmm_cause) |
| 407 | { |
| 408 | struct msgb *msg = gsm48_msgb_alloc(); |
| 409 | gmm_copy_id(msg, old_msg); |
| 410 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 411 | } |
| 412 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 413 | uint8_t gmm_cause) |
| 414 | { |
| 415 | struct msgb *msg = gsm48_msgb_alloc(); |
| 416 | mmctx2msgid(msg, mm); |
| 417 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 418 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 419 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 420 | /* Chapter 9.4.6.2 Detach accept */ |
Harald Welte | cd4dd4d | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 421 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 422 | { |
| 423 | struct msgb *msg = gsm48_msgb_alloc(); |
| 424 | struct gsm48_hdr *gh; |
| 425 | |
| 426 | DEBUGP(DMM, "<- GPRS DETACH ACCEPT\n"); |
| 427 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 428 | mmctx2msgid(msg, mm); |
| 429 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 430 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 431 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 432 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 433 | gh->data[0] = force_stby; |
| 434 | |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 435 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 436 | } |
| 437 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 438 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 439 | 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] | 440 | { |
| 441 | struct msgb *msg = gsm48_msgb_alloc(); |
| 442 | struct gsm48_hdr *gh; |
| 443 | |
Harald Welte | dce1255 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 444 | DEBUGP(DMM, "<- GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 445 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 446 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 447 | |
| 448 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 449 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 450 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 451 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 452 | gh->data[0] = id_type & 0xf; |
| 453 | |
Harald Welte | dce1255 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 454 | return gsm48_gmm_sendmsg(msg, 1, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 455 | } |
| 456 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 457 | /* Section 9.4.9: Authentication and Ciphering Request */ |
| 458 | static int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, uint8_t *rand, |
| 459 | uint8_t key_seq, uint8_t algo) |
| 460 | { |
| 461 | struct msgb *msg = gsm48_msgb_alloc(); |
| 462 | struct gsm48_hdr *gh; |
| 463 | struct gsm48_auth_ciph_req *acreq; |
| 464 | uint8_t *m_rand, *m_cksn; |
| 465 | |
| 466 | DEBUGP(DMM, "<- GPRS AUTH AND CIPHERING REQ (rand = %s)\n", |
| 467 | hexdump(rand, 16)); |
| 468 | |
| 469 | mmctx2msgid(msg, mm); |
| 470 | |
| 471 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 472 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 473 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; |
| 474 | |
| 475 | acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); |
| 476 | acreq->ciph_alg = algo & 0xf; |
| 477 | acreq->imeisv_req = 0x1; |
| 478 | acreq->force_stby = 0x0; |
| 479 | acreq->ac_ref_nr = 0x0; /* FIXME: increment this? */ |
| 480 | |
| 481 | /* Only if authentication is requested we need to set RAND + CKSN */ |
| 482 | if (rand) { |
| 483 | m_rand = msgb_put(msg, 16+1); |
| 484 | m_rand[0] = GSM48_IE_GMM_AUTH_RAND; |
| 485 | memcpy(m_rand+1, rand, 16); |
| 486 | |
| 487 | m_cksn = msgb_put(msg, 1+1); |
| 488 | m_cksn[0] = GSM48_IE_GMM_CIPH_CKSN; |
| 489 | m_cksn[1] = key_seq; |
| 490 | } |
| 491 | |
| 492 | /* Start T3360 */ |
| 493 | mmctx_timer_start(mm, 3360, GSM0408_T3360_SECS); |
| 494 | |
| 495 | /* FIXME: make sure we don't send any other messages to the MS */ |
| 496 | |
| 497 | return gsm48_gmm_sendmsg(msg, 1, mm); |
| 498 | } |
| 499 | |
| 500 | /* Section 9.4.11: Authentication and Ciphering Reject */ |
| 501 | static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) |
| 502 | { |
| 503 | struct msgb *msg = gsm48_msgb_alloc(); |
| 504 | struct gsm48_hdr *gh; |
| 505 | |
| 506 | DEBUGP(DMM, "<- GPRS AUTH AND CIPH REJECT\n"); |
| 507 | |
| 508 | mmctx2msgid(msg, mm); |
| 509 | |
| 510 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 511 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 512 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; |
| 513 | |
| 514 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 515 | } |
| 516 | |
| 517 | /* Section 9.4.10: Authentication and Ciphering Response */ |
| 518 | static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, |
| 519 | struct msgb *msg) |
| 520 | { |
| 521 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 522 | struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; |
| 523 | struct tlv_parsed tp; |
| 524 | int rc; |
| 525 | |
| 526 | /* FIXME: Stop T3360 */ |
| 527 | |
| 528 | rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, |
| 529 | (msg->data + msg->len) - acr->data, 0, 0); |
| 530 | |
| 531 | /* FIXME: compare ac_ref? */ |
| 532 | |
| 533 | if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || |
| 534 | !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV)) { |
| 535 | /* FIXME: missing mandatory IE */ |
| 536 | } |
| 537 | |
| 538 | /* FIXME: compare SRES with what we expected */ |
| 539 | /* FIXME: enable LLC cipheirng */ |
| 540 | return 0; |
| 541 | } |
| 542 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 543 | /* Check if we can already authorize a subscriber */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 544 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx, |
| 545 | enum gprs_t3350_mode t3350_mode) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 546 | { |
| 547 | if (strlen(ctx->imei) && strlen(ctx->imsi)) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 548 | #ifdef PTMSI_ALLOC |
| 549 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 550 | ctx->t3350_mode = t3350_mode; |
| 551 | mmctx_timer_start(ctx, 3350, GSM0408_T3350_SECS); |
| 552 | #endif |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 553 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 554 | return gsm48_tx_gmm_att_ack(ctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 555 | } |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 556 | if (!strlen(ctx->imei)) { |
| 557 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 558 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
| 559 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 560 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 561 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 562 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 563 | if (!strlen(ctx->imsi)) { |
| 564 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 565 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
| 566 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 567 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 568 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 574 | 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] | 575 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 576 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 577 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 578 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 579 | |
| 580 | gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 581 | DEBUGP(DMM, "-> GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s) ", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 582 | mi_type, mi_string); |
| 583 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 584 | if (!ctx) { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 585 | DEBUGP(DMM, "from unknown TLLI 0x%08x?!?\n", msgb_tlli(msg)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 586 | return -EINVAL; |
| 587 | } |
| 588 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 589 | if (mi_type == ctx->t3370_id_type) |
| 590 | mmctx_timer_stop(ctx, 3370); |
| 591 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 592 | switch (mi_type) { |
| 593 | case GSM_MI_TYPE_IMSI: |
| 594 | /* we already have a mm context with current TLLI, but no |
| 595 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 596 | * this initial context with data from the HLR */ |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 597 | if (strlen(ctx->imsi) == 0) { |
| 598 | /* Check if we already have a MM context for this IMSI */ |
| 599 | struct sgsn_mm_ctx *ictx; |
| 600 | ictx = sgsn_mm_ctx_by_imsi(mi_string); |
| 601 | if (ictx) { |
| 602 | DEBUGP(DMM, "Deleting old MM Context for same IMSI ", |
| 603 | "p_tmsi_old=0x%08x, p_tmsi_new=0x%08x\n", |
| 604 | ictx->p_tmsi, ctx->p_tmsi); |
| 605 | gprs_llgmm_assign(ictx->llme, ictx->tlli, |
| 606 | 0xffffffff, GPRS_ALGO_GEA0, NULL); |
| 607 | sgsn_mm_ctx_free(ictx); |
| 608 | } |
| 609 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 610 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imei)); |
| 611 | break; |
| 612 | case GSM_MI_TYPE_IMEI: |
| 613 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei)); |
| 614 | break; |
| 615 | case GSM_MI_TYPE_IMEISV: |
| 616 | break; |
| 617 | } |
| 618 | |
| 619 | DEBUGPC(DMM, "\n"); |
| 620 | /* Check if we can let the mobile station enter */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 621 | return gsm48_gmm_authorize(ctx, ctx->t3350_mode); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | /* Section 9.4.1 Attach request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 625 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 626 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 627 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 628 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 629 | uint8_t *cur = gh->data, *msnc, *mi, *old_ra_info, *ms_ra_acc_cap; |
| 630 | 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] | 631 | uint16_t drx_par; |
| 632 | uint32_t tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 633 | char mi_string[GSM48_MI_SIZE]; |
| 634 | struct gprs_ra_id ra_id; |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 635 | uint16_t cid; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 636 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 637 | DEBUGP(DMM, "-> GMM ATTACH REQUEST "); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 638 | |
| 639 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 640 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 641 | * or with random TLLI. */ |
| 642 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 643 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 644 | |
| 645 | /* MS network capability 10.5.5.12 */ |
| 646 | msnc_len = *cur++; |
| 647 | msnc = cur; |
Harald Welte | c48ac47 | 2010-07-03 21:20:06 +0200 | [diff] [blame] | 648 | if (msnc_len > 8) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 649 | goto err_inval; |
| 650 | cur += msnc_len; |
| 651 | |
| 652 | /* aTTACH Type 10.5.5.2 */ |
| 653 | att_type = *cur++ & 0x0f; |
| 654 | |
| 655 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 656 | drx_par = *cur++ << 8; |
| 657 | drx_par |= *cur++; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 658 | |
| 659 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 660 | mi_len = *cur++; |
| 661 | mi = cur; |
| 662 | if (mi_len > 8) |
| 663 | goto err_inval; |
| 664 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 665 | cur += mi_len; |
| 666 | |
| 667 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 668 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 669 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 670 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 671 | |
| 672 | /* Old routing area identification 10.5.5.15 */ |
| 673 | old_ra_info = cur; |
| 674 | cur += 6; |
| 675 | |
| 676 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 677 | ms_ra_acc_cap_len = *cur++; |
| 678 | ms_ra_acc_cap = cur; |
Harald Welte | c48ac47 | 2010-07-03 21:20:06 +0200 | [diff] [blame] | 679 | if (ms_ra_acc_cap_len > 51) |
| 680 | goto err_inval; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 681 | |
| 682 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 683 | |
| 684 | switch (mi_type) { |
| 685 | case GSM_MI_TYPE_IMSI: |
| 686 | /* Try to find MM context based on IMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 687 | if (!ctx) |
| 688 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 689 | if (!ctx) { |
| 690 | #if 0 |
| 691 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 692 | #else |
Harald Welte | eafe22c | 2010-12-24 15:39:08 +0100 | [diff] [blame] | 693 | /* As a temorary hack, we simply assume that the IMSI exists, |
| 694 | * as long as it is part of 'our' network */ |
| 695 | char mccmnc[16]; |
| 696 | snprintf(mccmnc, sizeof(mccmnc), "%03d%02d", ra_id.mcc, ra_id.mnc); |
| 697 | if (strncmp(mccmnc, mi_string, 5)) { |
| 698 | LOGP(DMM, LOGL_INFO, "Rejecting ATTACH REQUESET IMSI=%s\n", |
| 699 | mi_string); |
| 700 | return gsm48_tx_gmm_att_rej_oldmsg(msg, |
| 701 | GMM_CAUSE_GPRS_NOTALLOWED); |
| 702 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 703 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
| 704 | if (!ctx) |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 705 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_NET_FAIL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 706 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
| 707 | #endif |
| 708 | } |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 709 | ctx->tlli = msgb_tlli(msg); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 710 | ctx->llme = llme; |
Harald Welte | 68b99a4 | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 711 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 712 | break; |
| 713 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 714 | memcpy(&tmsi, mi+1, 4); |
| 715 | tmsi = ntohl(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 716 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 717 | if (!ctx) |
| 718 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 719 | if (!ctx) { |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 720 | /* Allocate a context as most of our code expects one. |
| 721 | * Context will not have an IMSI ultil ID RESP is received */ |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 722 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 723 | ctx->p_tmsi = tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 724 | } |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 725 | ctx->tlli = msgb_tlli(msg); |
| 726 | ctx->llme = llme; |
| 727 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 728 | break; |
| 729 | default: |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 730 | LOGP(DMM, LOGL_NOTICE, "Rejecting ATTACH REQUEST with " |
| 731 | "MI type %u\n", mi_type); |
| 732 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 733 | } |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 734 | /* Update MM Context with currient RA and Cell ID */ |
| 735 | ctx->ra = ra_id; |
| 736 | ctx->cell_id = cid; |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 737 | /* Update MM Context with other data */ |
| 738 | ctx->drx_parms = drx_par; |
| 739 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
| 740 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, ms_ra_acc_cap_len); |
| 741 | ctx->ms_network_capa.len = msnc_len; |
| 742 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
| 743 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 744 | #ifdef PTMSI_ALLOC |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 745 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 746 | ctx->p_tmsi_old = ctx->p_tmsi; |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 747 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 748 | #endif |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 749 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 750 | * foreign TLLI to local TLLI */ |
| 751 | ctx->tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 752 | |
| 753 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 754 | gprs_llgmm_assign(ctx->llme, ctx->tlli, ctx->tlli_new, |
| 755 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 756 | |
| 757 | DEBUGPC(DMM, "\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 758 | return ctx ? gsm48_gmm_authorize(ctx, GMM_T3350_MODE_ATT) : 0; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 759 | |
| 760 | err_inval: |
| 761 | DEBUGPC(DMM, "\n"); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 762 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_SEM_INCORR_MSG); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 763 | } |
| 764 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 765 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 766 | 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] | 767 | { |
| 768 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | c0d5950 | 2010-06-28 19:11:41 +0200 | [diff] [blame] | 769 | struct sgsn_pdp_ctx *pdp, *pdp2; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 770 | uint8_t detach_type, power_off; |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 771 | int rc; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 772 | |
| 773 | detach_type = gh->data[0] & 0x7; |
| 774 | power_off = gh->data[0] & 0x8; |
| 775 | |
| 776 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
| 777 | |
| 778 | DEBUGP(DMM, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", |
| 779 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 780 | power_off ? "Power-off" : ""); |
| 781 | |
| 782 | /* Mark MM state as deregistered */ |
| 783 | ctx->mm_state = GMM_DEREGISTERED; |
| 784 | |
Harald Welte | c0d5950 | 2010-06-28 19:11:41 +0200 | [diff] [blame] | 785 | /* delete all existing PDP contexts for this MS */ |
| 786 | llist_for_each_entry_safe(pdp, pdp2, &ctx->pdp_list, list) { |
| 787 | LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u " |
| 788 | "due to GPRS DETACH REQUEST\n", pdp->nsapi); |
| 789 | sgsn_delete_pdp_ctx(pdp); |
| 790 | /* FIXME: the callback wants to transmit a DEACT PDP CTX ACK, |
| 791 | * which is quite stupid for a MS that has just detached.. */ |
| 792 | } |
| 793 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 794 | /* force_stby = 0 */ |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 795 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 796 | |
| 797 | /* TLLI unassignment */ |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 798 | gprs_llgmm_assign(ctx->llme, ctx->tlli, 0xffffffff, |
| 799 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 800 | |
| 801 | return rc; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 802 | } |
| 803 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 804 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 805 | 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] | 806 | { |
| 807 | struct msgb *msg = gsm48_msgb_alloc(); |
| 808 | struct gsm48_hdr *gh; |
| 809 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 810 | uint8_t *mid; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 811 | |
| 812 | DEBUGP(DMM, "<- ROUTING AREA UPDATE ACCEPT\n"); |
| 813 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 814 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 815 | |
| 816 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 817 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 818 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 819 | |
| 820 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 821 | rua->force_stby = 0; /* not indicated */ |
| 822 | rua->upd_result = 0; /* RA updated */ |
| 823 | rua->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 824 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 825 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 826 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 827 | #if 0 |
| 828 | /* Optional: P-TMSI signature */ |
| 829 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 830 | ptsig = msgb_put(msg, 3); |
| 831 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 832 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 833 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 834 | #endif |
| 835 | |
| 836 | #ifdef PTMSI_ALLOC |
| 837 | /* Optional: Allocated P-TMSI */ |
| 838 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 839 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 840 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 841 | #endif |
| 842 | |
| 843 | /* Option: MS ID, ... */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 844 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 848 | 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] | 849 | { |
| 850 | struct msgb *msg = gsm48_msgb_alloc(); |
| 851 | struct gsm48_hdr *gh; |
| 852 | |
| 853 | DEBUGP(DMM, "<- ROUTING AREA UPDATE REJECT\n"); |
| 854 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 855 | gmm_copy_id(msg, old_msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 856 | |
| 857 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 858 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 859 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 860 | gh->data[0] = cause; |
| 861 | gh->data[1] = 0; /* ? */ |
| 862 | |
| 863 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 864 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 865 | } |
| 866 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 867 | static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, |
| 868 | uint16_t pdp_status) |
| 869 | { |
| 870 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 871 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 872 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 873 | * shall deactivate all those PDP contexts locally (without peer to |
| 874 | * peer signalling between the MS and the network), which are not in SM |
| 875 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 876 | * being in state PDP-INACTIVE. */ |
| 877 | |
| 878 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
| 879 | if (!(pdp_status & (1 << pdp->nsapi))) { |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 880 | LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u " |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 881 | "due to PDP CTX STATUS IE= 0x%04x\n", |
| 882 | pdp->nsapi, pdp_status); |
| 883 | sgsn_delete_pdp_ctx(pdp); |
| 884 | } |
| 885 | } |
| 886 | } |
| 887 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 888 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 889 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 890 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 891 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 892 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 893 | uint8_t *cur = gh->data; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 894 | uint8_t *ms_ra_acc_cap; |
| 895 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 896 | struct gprs_ra_id old_ra_id; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 897 | struct tlv_parsed tp; |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 898 | uint8_t upd_type; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 899 | int rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 900 | |
| 901 | /* Update Type 10.5.5.18 */ |
| 902 | upd_type = *cur++ & 0x0f; |
| 903 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 904 | DEBUGP(DMM, "-> GMM RA UPDATE REQUEST type=\"%s\" ", |
| 905 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 906 | |
| 907 | /* Old routing area identification 10.5.5.15 */ |
| 908 | gsm48_parse_ra(&old_ra_id, cur); |
| 909 | cur += 6; |
| 910 | |
| 911 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 912 | ms_ra_acc_cap_len = *cur++; |
| 913 | ms_ra_acc_cap = cur; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 914 | |
| 915 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 916 | * DRX parameter, MS network capability */ |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 917 | rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
| 918 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 919 | |
| 920 | switch (upd_type) { |
| 921 | case GPRS_UPD_T_RA_LA: |
| 922 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
| 923 | DEBUGPC(DMM, " unsupported in Mode III, is your SI13 corrupt?\n"); |
| 924 | return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_PROTO_ERR_UNSPEC); |
| 925 | break; |
| 926 | case GPRS_UPD_T_RA: |
| 927 | case GPRS_UPD_T_PERIODIC: |
| 928 | break; |
| 929 | } |
| 930 | |
| 931 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Harald Welte | f6bd340 | 2010-12-23 23:34:43 +0100 | [diff] [blame] | 932 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 933 | if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) { |
| 934 | /* The MS has to perform GPRS attach */ |
| 935 | DEBUGPC(DMM, " REJECT\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 936 | /* Device is still IMSI atached for CS but initiate GPRS ATTACH */ |
| 937 | return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 938 | } |
| 939 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 940 | /* Update the MM context with the new RA-ID */ |
| 941 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
| 942 | /* Update the MM context with the new TLLI */ |
| 943 | mmctx->tlli = msgb_tlli(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 944 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 945 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 946 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 947 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 948 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 949 | DEBUGPC(DMM, " ACCEPT\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 950 | #ifdef PTMSI_ALLOC |
| 951 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 952 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 953 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 954 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
| 955 | mmctx_timer_start(mmctx, 3350, GSM0408_T3350_SECS); |
| 956 | #endif |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 957 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 958 | * foreign TLLI to local TLLI */ |
| 959 | mmctx->tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 960 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 961 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 962 | gprs_llgmm_assign(mmctx->llme, mmctx->tlli, mmctx->tlli_new, |
| 963 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 964 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 965 | /* Look at PDP Context Status IE and see if MS's view of |
| 966 | * activated/deactivated NSAPIs agrees with our view */ |
| 967 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
| 968 | uint16_t pdp_status = ntohs(*(uint16_t *) |
| 969 | TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)); |
| 970 | process_ms_ctx_status(mmctx, pdp_status); |
| 971 | } |
| 972 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 973 | /* Send RA UPDATE ACCEPT */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 974 | return gsm48_tx_gmm_ra_upd_ack(mmctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 975 | } |
| 976 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 977 | 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] | 978 | { |
| 979 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 980 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 981 | DEBUGP(DMM, "-> GPRS MM STATUS (cause: %s)\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 982 | get_value_string(gmm_cause_names, gh->data[0])); |
| 983 | |
| 984 | return 0; |
| 985 | } |
| 986 | |
| 987 | /* GPRS Mobility Management */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 988 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 989 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 990 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 991 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 992 | int rc; |
| 993 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 994 | /* MMCTX can be NULL when called */ |
| 995 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 996 | if (!mmctx && |
| 997 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 998 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 999 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1000 | return gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1001 | } |
| 1002 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1003 | switch (gh->msg_type) { |
| 1004 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1005 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1006 | break; |
| 1007 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1008 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1009 | break; |
| 1010 | case GSM48_MT_GMM_ID_RESP: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1011 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1012 | break; |
| 1013 | case GSM48_MT_GMM_STATUS: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1014 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1015 | break; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1016 | case GSM48_MT_GMM_DETACH_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1017 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1018 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1019 | case GSM48_MT_GMM_ATTACH_COMPL: |
| 1020 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1021 | DEBUGP(DMM, "-> ATTACH COMPLETE\n"); |
| 1022 | mmctx_timer_stop(mmctx, 3350); |
| 1023 | mmctx->p_tmsi_old = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1024 | /* Unassign the old TLLI */ |
| 1025 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1026 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1027 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1028 | break; |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1029 | case GSM48_MT_GMM_RA_UPD_COMPL: |
| 1030 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1031 | DEBUGP(DMM, "-> ROUTEING AREA UPDATE COMPLETE\n"); |
| 1032 | mmctx_timer_stop(mmctx, 3350); |
| 1033 | mmctx->p_tmsi_old = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1034 | /* Unassign the old TLLI */ |
| 1035 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1036 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1037 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1038 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1039 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1040 | DEBUGP(DMM, "-> PTMSI REALLLICATION COMPLETE\n"); |
| 1041 | mmctx_timer_stop(mmctx, 3350); |
| 1042 | mmctx->p_tmsi_old = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1043 | /* Unassign the old TLLI */ |
| 1044 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1045 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, GPRS_ALGO_GEA0, NULL); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1046 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1047 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1048 | rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1049 | break; |
| 1050 | default: |
| 1051 | DEBUGP(DMM, "Unknown GSM 04.08 GMM msg type 0x%02x\n", |
| 1052 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1053 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1054 | break; |
| 1055 | } |
| 1056 | |
| 1057 | return rc; |
| 1058 | } |
| 1059 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1060 | static void mmctx_timer_cb(void *_mm) |
| 1061 | { |
| 1062 | struct sgsn_mm_ctx *mm = _mm; |
| 1063 | |
| 1064 | mm->num_T_exp++; |
| 1065 | |
| 1066 | switch (mm->T) { |
| 1067 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 1068 | if (mm->num_T_exp >= 5) { |
| 1069 | LOGP(DMM, LOGL_NOTICE, "T3350 expired >= 5 times\n"); |
| 1070 | mm->mm_state = GMM_DEREGISTERED; |
| 1071 | /* FIXME: should we return some error? */ |
| 1072 | break; |
| 1073 | } |
| 1074 | /* re-transmit the respective msg and re-start timer */ |
| 1075 | switch (mm->t3350_mode) { |
| 1076 | case GMM_T3350_MODE_ATT: |
| 1077 | gsm48_tx_gmm_att_ack(mm); |
| 1078 | break; |
| 1079 | case GMM_T3350_MODE_RAU: |
| 1080 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 1081 | break; |
| 1082 | case GMM_T3350_MODE_PTMSI_REALL: |
| 1083 | /* FIXME */ |
| 1084 | break; |
| 1085 | } |
| 1086 | bsc_schedule_timer(&mm->timer, GSM0408_T3350_SECS, 0); |
| 1087 | break; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1088 | case 3360: /* waiting for AUTH AND CIPH RESP */ |
| 1089 | if (mm->num_T_exp >= 5) { |
| 1090 | LOGP(DMM, LOGL_NOTICE, "T3360 expired >= 5 times\n"); |
| 1091 | mm->mm_state = GMM_DEREGISTERED; |
| 1092 | break; |
| 1093 | } |
| 1094 | /* FIXME: re-transmit the respective msg and re-start timer */ |
| 1095 | bsc_schedule_timer(&mm->timer, GSM0408_T3360_SECS, 0); |
| 1096 | break; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1097 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 1098 | if (mm->num_T_exp >= 5) { |
| 1099 | LOGP(DMM, LOGL_NOTICE, "T3370 expired >= 5 times\n"); |
| 1100 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
| 1101 | mm->mm_state = GMM_DEREGISTERED; |
| 1102 | break; |
| 1103 | } |
| 1104 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 1105 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
| 1106 | bsc_schedule_timer(&mm->timer, GSM0408_T3370_SECS, 0); |
| 1107 | break; |
| 1108 | default: |
| 1109 | LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n", |
| 1110 | mm->T); |
| 1111 | } |
| 1112 | } |
| 1113 | |
| 1114 | /* GPRS SESSION MANAGEMENT */ |
| 1115 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1116 | static void pdpctx_timer_cb(void *_mm); |
| 1117 | |
| 1118 | static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, |
| 1119 | unsigned int seconds) |
| 1120 | { |
| 1121 | if (bsc_timer_pending(&pdp->timer)) |
| 1122 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 1123 | "timer %u pending\n", T, pdp->T); |
| 1124 | pdp->T = T; |
| 1125 | pdp->num_T_exp = 0; |
| 1126 | |
| 1127 | /* FIXME: we should do this only once ? */ |
| 1128 | pdp->timer.data = pdp; |
| 1129 | pdp->timer.cb = &pdpctx_timer_cb; |
| 1130 | |
| 1131 | bsc_schedule_timer(&pdp->timer, seconds, 0); |
| 1132 | } |
| 1133 | |
| 1134 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1135 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 1136 | { |
| 1137 | uint8_t v[6]; |
| 1138 | |
| 1139 | v[0] = PDP_TYPE_ORG_IETF; |
| 1140 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 1141 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 1142 | |
| 1143 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1144 | } |
| 1145 | |
| 1146 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 1147 | { |
| 1148 | uint8_t v[2]; |
| 1149 | |
| 1150 | v[0] = PDP_TYPE_ORG_ETSI; |
| 1151 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 1152 | |
| 1153 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1154 | } |
| 1155 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1156 | /* Section 9.5.2: Ativate PDP Context Accept */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1157 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1158 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1159 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1160 | struct gsm48_hdr *gh; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1161 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1162 | |
| 1163 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT ACK\n"); |
| 1164 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1165 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1166 | |
| 1167 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1168 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1169 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1170 | |
| 1171 | /* Negotiated LLC SAPI */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1172 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1173 | |
Harald Welte | 55e0df7 | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 1174 | /* FIXME: copy QoS parameters from original request */ |
| 1175 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 1176 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1177 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1178 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1179 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1180 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1181 | /* PDP address */ |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1182 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 1183 | * the IE is identical with the 04.08 PDP Address IE */ |
| 1184 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1185 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 1186 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1187 | pdp->lib->eua.v[0] |= 0xf0; |
| 1188 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1189 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
| 1190 | if (pdp->lib->pco_req.l && pdp->lib->pco_req.v) |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1191 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | 3c0b9b9 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 1192 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1193 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1194 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1195 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1196 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1197 | } |
| 1198 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1199 | /* Section 9.5.3: Activate PDP Context reject */ |
| 1200 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1201 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 1202 | { |
| 1203 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1204 | struct gsm48_hdr *gh; |
| 1205 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1206 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1207 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1208 | |
| 1209 | mmctx2msgid(msg, mm); |
| 1210 | |
| 1211 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1212 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1213 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 1214 | |
| 1215 | msgb_v_put(msg, cause); |
| 1216 | if (pco_len && pco_v) |
| 1217 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 1218 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1219 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1220 | } |
| 1221 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1222 | /* Section 9.5.8: Deactivate PDP Context Request */ |
| 1223 | static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1224 | uint8_t sm_cause) |
| 1225 | { |
| 1226 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1227 | struct gsm48_hdr *gh; |
| 1228 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1229 | |
| 1230 | DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT REQ\n"); |
| 1231 | |
| 1232 | mmctx2msgid(msg, mm); |
| 1233 | |
| 1234 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1235 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1236 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; |
| 1237 | |
| 1238 | msgb_v_put(msg, sm_cause); |
| 1239 | |
| 1240 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1241 | } |
| 1242 | int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause) |
| 1243 | { |
| 1244 | pdpctx_timer_start(pdp, 3395, GSM0408_T3395_SECS); |
| 1245 | |
| 1246 | return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause); |
| 1247 | } |
| 1248 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1249 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1250 | 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] | 1251 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1252 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1253 | struct gsm48_hdr *gh; |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1254 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1255 | |
| 1256 | DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
| 1257 | |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1258 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1259 | |
| 1260 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1261 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1262 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 1263 | |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1264 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1265 | } |
| 1266 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 1267 | { |
| 1268 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1269 | } |
| 1270 | |
| 1271 | /* Section 9.5.1: Activate PDP Context Request */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1272 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 1273 | struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1274 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1275 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1276 | 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] | 1277 | uint8_t req_qos_len, req_pdpa_len; |
| 1278 | uint8_t *req_qos, *req_pdpa; |
| 1279 | struct tlv_parsed tp; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1280 | uint8_t transaction_id = (gh->proto_discr >> 4); |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1281 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1282 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1283 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1284 | DEBUGP(DMM, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
| 1285 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1286 | |
Harald Welte | 23c1376 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1287 | /* FIXME: length checks! */ |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1288 | req_qos_len = act_req->data[0]; |
| 1289 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 1290 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 1291 | 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] | 1292 | |
Harald Welte | 23c1376 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1293 | /* Optional: Access Point Name, Protocol Config Options */ |
| 1294 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 1295 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 1296 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 1297 | else |
| 1298 | memset(&tp, 0, sizeof(tp)); |
| 1299 | |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1300 | switch (req_pdpa[0] & 0xf) { |
| 1301 | case 0x0: |
| 1302 | DEBUGPC(DMM, "ETSI "); |
| 1303 | break; |
| 1304 | case 0x1: |
| 1305 | DEBUGPC(DMM, "IETF "); |
| 1306 | break; |
| 1307 | case 0xf: |
| 1308 | DEBUGPC(DMM, "Empty "); |
| 1309 | break; |
| 1310 | } |
| 1311 | |
| 1312 | switch (req_pdpa[1]) { |
| 1313 | case 0x21: |
| 1314 | DEBUGPC(DMM, "IPv4 "); |
| 1315 | if (req_pdpa_len >= 6) { |
| 1316 | struct in_addr ia; |
| 1317 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 1318 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 1319 | } |
| 1320 | break; |
| 1321 | case 0x57: |
| 1322 | DEBUGPC(DMM, "IPv6 "); |
| 1323 | if (req_pdpa_len >= 18) { |
| 1324 | /* FIXME: print IPv6 address */ |
| 1325 | } |
| 1326 | break; |
| 1327 | default: |
| 1328 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 1329 | break; |
| 1330 | } |
| 1331 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1332 | DEBUGPC(DMM, "\n"); |
| 1333 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1334 | /* put the non-TLV elements in the TLV parser structure to |
| 1335 | * pass them on to the SGSN / GTP code */ |
| 1336 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 1337 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 1338 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 1339 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 1340 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1341 | /* FIXME: determine GGSN based on APN and subscription options */ |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1342 | if (TLVP_PRESENT(&tp, GSM48_IE_GSM_APN)) {} |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1343 | |
| 1344 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 1345 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 1346 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 1347 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1348 | GSM_CAUSE_INV_MAND_INFO, |
| 1349 | 0, NULL); |
| 1350 | } |
| 1351 | |
| 1352 | /* Check if NSAPI is already in use */ |
Harald Welte | b37515e | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 1353 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 1354 | if (pdp) { |
| 1355 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 1356 | if (pdp->sapi == act_req->req_llc_sapi && |
| 1357 | pdp->ti == transaction_id) { |
| 1358 | /* This apparently is a re-transmission of a PDP CTX |
| 1359 | * ACT REQ (our ACT ACK must have got dropped) */ |
| 1360 | return gsm48_tx_gsm_act_pdp_acc(pdp); |
| 1361 | } |
| 1362 | |
| 1363 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1364 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1365 | GSM_CAUSE_NSAPI_IN_USE, |
| 1366 | 0, NULL); |
| 1367 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1368 | |
Harald Welte | 19f9e30 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 1369 | /* Only increment counter for a real activation, after we checked |
| 1370 | * for re-transmissions */ |
| 1371 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 1372 | |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1373 | ggsn = sgsn_ggsn_ctx_by_id(0); |
| 1374 | if (!ggsn) { |
| 1375 | LOGP(DGPRS, LOGL_ERROR, "No GGSN context 0 found!\n"); |
| 1376 | return -EIO; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1377 | } |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1378 | ggsn->gsn = sgsn->gsn; |
| 1379 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, act_req->req_nsapi, &tp); |
| 1380 | if (!pdp) |
| 1381 | return -1; |
| 1382 | |
| 1383 | /* Store SAPI and Transaction Identifier */ |
| 1384 | pdp->sapi = act_req->req_llc_sapi; |
| 1385 | pdp->ti = transaction_id; |
| 1386 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1387 | return 0; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1388 | } |
| 1389 | |
| 1390 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1391 | 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] | 1392 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1393 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1394 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1395 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1396 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1397 | DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1398 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1399 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1400 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1401 | if (!pdp) { |
| 1402 | LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Request for " |
| 1403 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1404 | mm->imsi, transaction_id); |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1405 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1406 | } |
| 1407 | |
| 1408 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1409 | } |
| 1410 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1411 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
| 1412 | static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) |
| 1413 | { |
| 1414 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 1415 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1416 | struct sgsn_pdp_ctx *pdp; |
| 1417 | |
| 1418 | DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT ACK\n"); |
| 1419 | |
| 1420 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1421 | if (!pdp) { |
| 1422 | LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Accept for " |
| 1423 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1424 | mm->imsi, transaction_id); |
| 1425 | return 0; |
| 1426 | } |
| 1427 | |
| 1428 | return sgsn_delete_pdp_ctx(pdp); |
| 1429 | } |
| 1430 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1431 | 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] | 1432 | { |
| 1433 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1434 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1435 | DEBUGP(DMM, "-> GPRS SM STATUS (cause: %s)\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1436 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1437 | |
| 1438 | return 0; |
| 1439 | } |
| 1440 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1441 | static void pdpctx_timer_cb(void *_pdp) |
| 1442 | { |
| 1443 | struct sgsn_pdp_ctx *pdp = _pdp; |
| 1444 | |
| 1445 | pdp->num_T_exp++; |
| 1446 | |
| 1447 | switch (pdp->T) { |
| 1448 | case 3395: /* waiting for PDP CTX DEACT ACK */ |
| 1449 | if (pdp->num_T_exp >= 4) { |
| 1450 | LOGP(DMM, LOGL_NOTICE, "T3395 expired >= 5 times\n"); |
| 1451 | pdp->state = PDP_STATE_INACTIVE; |
| 1452 | sgsn_delete_pdp_ctx(pdp); |
| 1453 | break; |
| 1454 | } |
| 1455 | gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); |
| 1456 | bsc_schedule_timer(&pdp->timer, GSM0408_T3395_SECS, 0); |
| 1457 | break; |
| 1458 | default: |
| 1459 | LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n", |
| 1460 | pdp->T); |
| 1461 | } |
| 1462 | } |
| 1463 | |
| 1464 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1465 | /* GPRS Session Management */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1466 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1467 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1468 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1469 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1470 | int rc; |
| 1471 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1472 | /* MMCTX can be NULL when called */ |
| 1473 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1474 | if (!mmctx) { |
| 1475 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Harald Welte | 18d1452 | 2010-07-02 16:18:18 +0200 | [diff] [blame] | 1476 | gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_IMPL_DETACHED); |
| 1477 | return gsm48_tx_sm_status_oldmsg(msg, GSM_CAUSE_PROTO_ERR_UNSPEC); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1478 | } |
| 1479 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1480 | switch (gh->msg_type) { |
| 1481 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1482 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1483 | break; |
| 1484 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1485 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1486 | break; |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1487 | case GSM48_MT_GSM_DEACT_PDP_ACK: |
| 1488 | rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); |
| 1489 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1490 | case GSM48_MT_GSM_STATUS: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1491 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1492 | break; |
| 1493 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 1494 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 1495 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
| 1496 | DEBUGP(DMM, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n", |
| 1497 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1498 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1499 | break; |
| 1500 | default: |
| 1501 | DEBUGP(DMM, "Unknown GSM 04.08 GSM msg type 0x%02x\n", |
| 1502 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1503 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1504 | break; |
| 1505 | |
| 1506 | } |
| 1507 | |
| 1508 | return rc; |
| 1509 | } |
| 1510 | |
| 1511 | /* Main entry point for incoming 04.08 GPRS messages */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1512 | int gsm0408_gprs_rcvmsg(struct msgb *msg, struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1513 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1514 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1515 | uint8_t pdisc = gh->proto_discr & 0x0f; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1516 | struct sgsn_mm_ctx *mmctx; |
| 1517 | struct gprs_ra_id ra_id; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1518 | int rc = -EINVAL; |
| 1519 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1520 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 1521 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1522 | if (mmctx) { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1523 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1524 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1525 | mmctx->llme = llme; |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1526 | } |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1527 | |
| 1528 | /* MMCTX can be NULL */ |
| 1529 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1530 | switch (pdisc) { |
| 1531 | case GSM48_PDISC_MM_GPRS: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1532 | rc = gsm0408_rcv_gmm(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1533 | break; |
| 1534 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1535 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1536 | break; |
| 1537 | default: |
| 1538 | DEBUGP(DMM, "Unknown GSM 04.08 discriminator 0x%02x\n", |
| 1539 | pdisc); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1540 | /* FIXME: return status message */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1541 | break; |
| 1542 | } |
| 1543 | |
| 1544 | return rc; |
| 1545 | } |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1546 | |
| 1547 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 1548 | { |
| 1549 | struct sgsn_mm_ctx *mmctx; |
| 1550 | |
| 1551 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1552 | if (!mmctx) { |
| 1553 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 1554 | "TLLI=%08x\n", tlli); |
| 1555 | return -EINVAL; |
| 1556 | } |
| 1557 | |
| 1558 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL) { |
| 1559 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request while state " |
| 1560 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 1561 | return -EINVAL; |
| 1562 | } |
| 1563 | |
| 1564 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
| 1565 | mmctx->mm_state = GMM_REGISTERED_SUSPENDED; |
| 1566 | return 0; |
| 1567 | } |
| 1568 | |
| 1569 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 1570 | uint8_t suspend_ref) |
| 1571 | { |
| 1572 | struct sgsn_mm_ctx *mmctx; |
| 1573 | |
| 1574 | /* FIXME: make use of suspend reference? */ |
| 1575 | |
| 1576 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1577 | if (!mmctx) { |
| 1578 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 1579 | "TLLI=%08x\n", tlli); |
| 1580 | return -EINVAL; |
| 1581 | } |
| 1582 | |
| 1583 | if (mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
| 1584 | LOGP(DMM, LOGL_NOTICE, "RESUME request while state " |
| 1585 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 1586 | /* FIXME: should we not simply ignore it? */ |
| 1587 | return -EINVAL; |
| 1588 | } |
| 1589 | |
| 1590 | /* Transition from SUSPENDED to NORMAL */ |
| 1591 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
| 1592 | return 0; |
| 1593 | } |