Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 4 | /* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 18 | * |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 27 | #include <stdint.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 28 | #include <errno.h> |
| 29 | |
| 30 | #include <netinet/in.h> |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 32 | |
| 33 | #include <openbsc/db.h> |
| 34 | #include <osmocore/msgb.h> |
| 35 | #include <osmocore/tlv.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 36 | #include <osmocore/gsm_utils.h> |
| 37 | #include <osmocore/signal.h> |
| 38 | #include <osmocore/talloc.h> |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 39 | #include <osmocore/rate_ctr.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 40 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 41 | #include <openbsc/debug.h> |
| 42 | #include <openbsc/gsm_data.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 43 | #include <openbsc/gsm_subscriber.h> |
| 44 | #include <openbsc/gsm_04_08.h> |
| 45 | #include <openbsc/gsm_04_08_gprs.h> |
| 46 | #include <openbsc/paging.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 47 | #include <openbsc/transaction.h> |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 48 | #include <openbsc/gprs_bssgp.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 49 | #include <openbsc/gprs_llc.h> |
| 50 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 51 | #include <openbsc/gprs_gmm.h> |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 52 | #include <openbsc/sgsn.h> |
| 53 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 54 | #include <pdp.h> |
| 55 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 56 | #define PTMSI_ALLOC |
| 57 | |
| 58 | /* Section 11.2.2 / Table 11.4 MM timers netowkr side */ |
| 59 | #define GSM0408_T3322_SECS 6 /* DETACH_REQ -> DETACH_ACC */ |
| 60 | #define GSM0408_T3350_SECS 6 /* waiting for ATT/RAU/TMSI COMPL */ |
| 61 | #define GSM0408_T3360_SECS 6 /* waiting for AUTH/CIPH RESP */ |
| 62 | #define GSM0408_T3370_SECS 6 /* waiting for ID RESP */ |
| 63 | |
| 64 | /* Section 11.2.2 / Table 11.4a MM timers netowkr side */ |
| 65 | #define GSM0408_T3313_SECS 30 /* waiting for paging response */ |
| 66 | #define GSM0408_T3314_SECS 44 /* force to STBY on expiry */ |
| 67 | #define GSM0408_T3316_SECS 44 |
| 68 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 69 | /* Section 11.3 / Table 11.2d Timers of Session Management - network side */ |
| 70 | #define GSM0408_T3385_SECS 8 /* wait for ACT PDP CTX REQ */ |
| 71 | #define GSM0408_T3386_SECS 8 /* wait for MODIFY PDP CTX ACK */ |
| 72 | #define GSM0408_T3395_SECS 8 /* wait for DEACT PDP CTX ACK */ |
| 73 | #define GSM0408_T3397_SECS 8 /* wait for DEACT AA PDP CTX ACK */ |
| 74 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 75 | extern struct sgsn_instance *sgsn; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 76 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 77 | /* Protocol related stuff, should go into libosmocore */ |
| 78 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 79 | /* 10.5.5.14 GPRS MM Cause / Table 10.5.147 */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 80 | const struct value_string gmm_cause_names[] = { |
Harald Welte | 17b2646 | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 81 | { GMM_CAUSE_IMSI_UNKNOWN, "IMSI unknown in HLR" }, |
| 82 | { GMM_CAUSE_ILLEGAL_MS, "Illegal MS" }, |
| 83 | { GMM_CAUSE_ILLEGAL_ME, "Illegal ME" }, |
| 84 | { GMM_CAUSE_GPRS_NOTALLOWED, "GPRS services not allowed" }, |
| 85 | { GMM_CAUSE_GPRS_OTHER_NOTALLOWED, |
| 86 | "GPRS services and non-GPRS services not allowed" }, |
| 87 | { GMM_CAUSE_MS_ID_NOT_DERIVED, |
| 88 | "MS identity cannot be derived by the network" }, |
| 89 | { GMM_CAUSE_IMPL_DETACHED, "Implicitly detached" }, |
| 90 | { GMM_CAUSE_PLMN_NOTALLOWED, "PLMN not allowed" }, |
| 91 | { GMM_CAUSE_LA_NOTALLOWED, "Location Area not allowed" }, |
| 92 | { GMM_CAUSE_ROAMING_NOTALLOWED, |
| 93 | "Roaming not allowed in this location area" }, |
| 94 | { GMM_CAUSE_NO_GPRS_PLMN, |
| 95 | "GPRS services not allowed in this PLMN" }, |
| 96 | { GMM_CAUSE_MSC_TEMP_NOTREACH, "MSC temporarily not reachable" }, |
| 97 | { GMM_CAUSE_NET_FAIL, "Network failure" }, |
| 98 | { GMM_CAUSE_CONGESTION, "Congestion" }, |
| 99 | { GMM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 100 | { GMM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 101 | { GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 102 | "Message type non-existant or not implemented" }, |
| 103 | { GMM_CAUSE_MSGT_INCOMP_P_STATE, |
| 104 | "Message type not compatible with protocol state" }, |
| 105 | { GMM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 106 | "Information element non-existent or not implemented" }, |
Harald Welte | 17b2646 | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 107 | { GMM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 108 | { GMM_CAUSE_MSG_INCOMP_P_STATE, |
| 109 | "Message not compatible with protocol state " }, |
Harald Welte | 17b2646 | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 110 | { GMM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 111 | { 0, NULL } |
| 112 | }; |
| 113 | |
| 114 | /* 10.5.6.6 SM Cause / Table 10.5.157 */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 115 | const struct value_string gsm_cause_names[] = { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 116 | { GSM_CAUSE_INSUFF_RSRC, "Insufficient resources" }, |
| 117 | { GSM_CAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 118 | { GSM_CAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 119 | { GSM_CAUSE_AUTH_FAILED, "User Authentication failed" }, |
| 120 | { GSM_CAUSE_ACT_REJ_GGSN, "Activation rejected by GGSN" }, |
| 121 | { GSM_CAUSE_ACT_REJ_UNSPEC, "Activation rejected, unspecified" }, |
| 122 | { GSM_CAUSE_SERV_OPT_NOTSUPP, "Service option not supported" }, |
| 123 | { GSM_CAUSE_REQ_SERV_OPT_NOTSUB, |
| 124 | "Requested service option not subscribed" }, |
| 125 | { GSM_CAUSE_SERV_OPT_TEMP_OOO, |
| 126 | "Service option temporarily out of order" }, |
| 127 | { GSM_CAUSE_NSAPI_IN_USE, "NSAPI already used" }, |
| 128 | { GSM_CAUSE_DEACT_REGULAR, "Regular deactivation" }, |
| 129 | { GSM_CAUSE_QOS_NOT_ACCEPTED, "QoS not accepted" }, |
| 130 | { GSM_CAUSE_NET_FAIL, "Network Failure" }, |
| 131 | { GSM_CAUSE_REACT_RQD, "Reactivation required" }, |
| 132 | { GSM_CAUSE_FEATURE_NOTSUPP, "Feature not supported " }, |
| 133 | { GSM_CAUSE_INVALID_TRANS_ID, "Invalid transaction identifier" }, |
| 134 | { GSM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
| 135 | { GSM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 136 | { GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 137 | "Message type non-existant or not implemented" }, |
| 138 | { GSM_CAUSE_MSGT_INCOMP_P_STATE, |
| 139 | "Message type not compatible with protocol state" }, |
| 140 | { GSM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 141 | "Information element non-existent or not implemented" }, |
| 142 | { GSM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
| 143 | { GSM_CAUSE_MSG_INCOMP_P_STATE, |
| 144 | "Message not compatible with protocol state " }, |
| 145 | { GSM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
| 146 | { 0, NULL } |
| 147 | }; |
| 148 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 149 | /* 10.5.5.2 */ |
| 150 | const struct value_string gprs_att_t_strs[] = { |
| 151 | { GPRS_ATT_T_ATTACH, "GPRS attach" }, |
| 152 | { GPRS_ATT_T_ATT_WHILE_IMSI, "GPRS attach while IMSI attached" }, |
| 153 | { GPRS_ATT_T_COMBINED, "Combined GPRS/IMSI attach" }, |
| 154 | { 0, NULL } |
| 155 | }; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 156 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 157 | const struct value_string gprs_upd_t_strs[] = { |
| 158 | { GPRS_UPD_T_RA, "RA updating" }, |
| 159 | { GPRS_UPD_T_RA_LA, "combined RA/LA updating" }, |
| 160 | { GPRS_UPD_T_RA_LA_IMSI_ATT, "combined RA/LA updating + IMSI attach" }, |
| 161 | { GPRS_UPD_T_PERIODIC, "periodic updating" }, |
| 162 | { 0, NULL } |
| 163 | }; |
| 164 | |
| 165 | /* 10.5.5.5 */ |
| 166 | const struct value_string gprs_det_t_mo_strs[] = { |
| 167 | { GPRS_DET_T_MO_GPRS, "GPRS detach" }, |
| 168 | { GPRS_DET_T_MO_IMSI, "IMSI detach" }, |
| 169 | { GPRS_DET_T_MO_COMBINED, "Combined GPRS/IMSI detach" }, |
| 170 | { 0, NULL } |
| 171 | }; |
| 172 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 173 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 174 | .def = { |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 175 | [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 176 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 177 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 178 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_FIXED, 3 }, |
| 179 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_FIXED, 16 }, |
| 180 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 181 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 182 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 183 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 184 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 185 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 186 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 187 | }, |
| 188 | }; |
| 189 | |
| 190 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 191 | .def = { |
| 192 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 193 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 194 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 195 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 196 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 197 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 198 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, |
| 199 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 200 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 201 | }, |
| 202 | }; |
| 203 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 204 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 205 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 206 | static void mmctx_timer_cb(void *_mm); |
| 207 | |
| 208 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 209 | unsigned int seconds) |
| 210 | { |
| 211 | if (bsc_timer_pending(&mm->timer)) |
| 212 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 213 | "timer %u pending\n", T, mm->T); |
| 214 | mm->T = T; |
| 215 | mm->num_T_exp = 0; |
| 216 | |
| 217 | /* FIXME: we should do this only once ? */ |
| 218 | mm->timer.data = mm; |
| 219 | mm->timer.cb = &mmctx_timer_cb; |
| 220 | |
| 221 | bsc_schedule_timer(&mm->timer, seconds, 0); |
| 222 | } |
| 223 | |
| 224 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 225 | { |
| 226 | if (mm->T != T) |
| 227 | LOGP(DMM, LOGL_ERROR, "Stopping MM timer %u but " |
| 228 | "%u is running\n", T, mm->T); |
| 229 | bsc_del_timer(&mm->timer); |
| 230 | } |
| 231 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 232 | /* Send a message through the underlying layer */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 233 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
| 234 | const struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 235 | { |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 236 | if (mm) |
| 237 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
| 238 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 239 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 240 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 241 | } |
| 242 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 243 | /* copy identifiers from old message to new message, this |
| 244 | * is required so lower layers can route it correctly */ |
| 245 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 246 | { |
| 247 | msgb_tlli(msg) = msgb_tlli(old); |
| 248 | msgb_bvci(msg) = msgb_bvci(old); |
| 249 | msgb_nsei(msg) = msgb_nsei(old); |
| 250 | } |
| 251 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 252 | /* Store BVCI/NSEI in MM context */ |
| 253 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 254 | { |
| 255 | mm->bvci = msgb_bvci(msg); |
| 256 | mm->nsei = msgb_nsei(msg); |
| 257 | } |
| 258 | |
| 259 | /* Store BVCI/NSEI in MM context */ |
| 260 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 261 | { |
| 262 | msgb_tlli(msg) = mm->tlli; |
| 263 | msgb_bvci(msg) = mm->bvci; |
| 264 | msgb_nsei(msg) = mm->nsei; |
| 265 | } |
| 266 | |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 267 | /* Chapter 9.4.18 */ |
| 268 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 269 | struct sgsn_mm_ctx *mmctx, int sm) |
| 270 | { |
| 271 | struct gsm48_hdr *gh; |
| 272 | |
| 273 | /* MMCTX might be NULL! */ |
| 274 | |
| 275 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
| 276 | get_value_string(gmm_cause_names, cause)); |
| 277 | |
| 278 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 279 | if (sm) { |
| 280 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 281 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 282 | } else { |
| 283 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 284 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 285 | } |
| 286 | gh->data[0] = cause; |
| 287 | |
| 288 | return gsm48_gmm_sendmsg(msg, 0, mmctx); |
| 289 | } |
| 290 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 291 | { |
| 292 | struct msgb *msg = gsm48_msgb_alloc(); |
| 293 | |
| 294 | mmctx2msgid(msg, mmctx); |
| 295 | return _tx_status(msg, cause, mmctx, 0); |
| 296 | }; |
| 297 | static int gsm48_tx_gmm_status_oldmsg(struct msgb *oldmsg, uint8_t cause) |
| 298 | { |
| 299 | struct msgb *msg = gsm48_msgb_alloc(); |
| 300 | |
| 301 | gmm_copy_id(msg, oldmsg); |
| 302 | return _tx_status(msg, cause, NULL, 0); |
| 303 | } |
| 304 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 305 | { |
| 306 | struct msgb *msg = gsm48_msgb_alloc(); |
| 307 | |
| 308 | mmctx2msgid(msg, mmctx); |
| 309 | return _tx_status(msg, cause, mmctx, 1); |
| 310 | }; |
| 311 | static int gsm48_tx_sm_status_oldmsg(struct msgb *oldmsg, uint8_t cause) |
| 312 | { |
| 313 | struct msgb *msg = gsm48_msgb_alloc(); |
| 314 | |
| 315 | gmm_copy_id(msg, oldmsg); |
| 316 | return _tx_status(msg, cause, NULL, 1); |
| 317 | } |
| 318 | |
| 319 | |
Harald Welte | 242d172 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 320 | static struct gsm48_qos default_qos = { |
| 321 | .delay_class = 4, /* best effort */ |
| 322 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 323 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 324 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 325 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 326 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 327 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 328 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 329 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 330 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 331 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 332 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 333 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 334 | .handling_prio = 3, |
| 335 | .xfer_delay = 0x10, /* 200ms */ |
| 336 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 337 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 338 | .sig_ind = 0, /* not optimised for signalling */ |
| 339 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 340 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 341 | }; |
| 342 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 343 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 344 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 345 | { |
| 346 | struct msgb *msg = gsm48_msgb_alloc(); |
| 347 | struct gsm48_hdr *gh; |
| 348 | struct gsm48_attach_ack *aa; |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 349 | uint8_t *ptsig, *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 350 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 351 | DEBUGP(DMM, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 352 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 353 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 354 | |
| 355 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 356 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 357 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 358 | |
| 359 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 360 | aa->force_stby = 0; /* not indicated */ |
| 361 | aa->att_result = 1; /* GPRS only */ |
| 362 | aa->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
| 363 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 364 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 365 | |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 366 | #if 0 |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 367 | /* Optional: P-TMSI signature */ |
| 368 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 369 | ptsig = msgb_put(msg, 3); |
| 370 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 371 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 372 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 373 | |
| 374 | /* Optional: Negotiated Ready timer value */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 375 | #endif |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 376 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 377 | #ifdef PTMSI_ALLOC |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 378 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 379 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 380 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 381 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 382 | #endif |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 383 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 384 | /* Optional: MS-identity (combined attach) */ |
| 385 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 386 | |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 387 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 391 | static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 392 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 393 | struct gsm48_hdr *gh; |
| 394 | |
| 395 | DEBUGP(DMM, "<- GPRS ATTACH REJECT\n"); |
| 396 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 397 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 398 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 399 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 400 | gh->data[0] = gmm_cause; |
| 401 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 402 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 403 | } |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 404 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 405 | uint8_t gmm_cause) |
| 406 | { |
| 407 | struct msgb *msg = gsm48_msgb_alloc(); |
| 408 | gmm_copy_id(msg, old_msg); |
| 409 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 410 | } |
| 411 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 412 | uint8_t gmm_cause) |
| 413 | { |
| 414 | struct msgb *msg = gsm48_msgb_alloc(); |
| 415 | mmctx2msgid(msg, mm); |
| 416 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 417 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 418 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 419 | /* Chapter 9.4.6.2 Detach accept */ |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 420 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 421 | { |
| 422 | struct msgb *msg = gsm48_msgb_alloc(); |
| 423 | struct gsm48_hdr *gh; |
| 424 | |
| 425 | DEBUGP(DMM, "<- GPRS DETACH ACCEPT\n"); |
| 426 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 427 | mmctx2msgid(msg, mm); |
| 428 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 429 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 430 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 431 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 432 | gh->data[0] = force_stby; |
| 433 | |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 434 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 435 | } |
| 436 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 437 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 438 | static int gsm48_tx_gmm_id_req(struct sgsn_mm_ctx *mm, uint8_t id_type) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 439 | { |
| 440 | struct msgb *msg = gsm48_msgb_alloc(); |
| 441 | struct gsm48_hdr *gh; |
| 442 | |
Harald Welte | 96cf248 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 443 | DEBUGP(DMM, "<- GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 444 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 445 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 446 | |
| 447 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 448 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 449 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 450 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 451 | gh->data[0] = id_type & 0xf; |
| 452 | |
Harald Welte | 96cf248 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 453 | return gsm48_gmm_sendmsg(msg, 1, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 454 | } |
| 455 | |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 456 | /* Section 9.4.9: Authentication and Ciphering Request */ |
| 457 | static int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, uint8_t *rand, |
| 458 | uint8_t key_seq, uint8_t algo) |
| 459 | { |
| 460 | struct msgb *msg = gsm48_msgb_alloc(); |
| 461 | struct gsm48_hdr *gh; |
| 462 | struct gsm48_auth_ciph_req *acreq; |
| 463 | uint8_t *m_rand, *m_cksn; |
| 464 | |
| 465 | DEBUGP(DMM, "<- GPRS AUTH AND CIPHERING REQ (rand = %s)\n", |
| 466 | hexdump(rand, 16)); |
| 467 | |
| 468 | mmctx2msgid(msg, mm); |
| 469 | |
| 470 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 471 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 472 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; |
| 473 | |
| 474 | acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); |
| 475 | acreq->ciph_alg = algo & 0xf; |
| 476 | acreq->imeisv_req = 0x1; |
| 477 | acreq->force_stby = 0x0; |
| 478 | acreq->ac_ref_nr = 0x0; /* FIXME: increment this? */ |
| 479 | |
| 480 | /* Only if authentication is requested we need to set RAND + CKSN */ |
| 481 | if (rand) { |
| 482 | m_rand = msgb_put(msg, 16+1); |
| 483 | m_rand[0] = GSM48_IE_GMM_AUTH_RAND; |
| 484 | memcpy(m_rand+1, rand, 16); |
| 485 | |
| 486 | m_cksn = msgb_put(msg, 1+1); |
| 487 | m_cksn[0] = GSM48_IE_GMM_CIPH_CKSN; |
| 488 | m_cksn[1] = key_seq; |
| 489 | } |
| 490 | |
| 491 | /* Start T3360 */ |
| 492 | mmctx_timer_start(mm, 3360, GSM0408_T3360_SECS); |
| 493 | |
| 494 | /* FIXME: make sure we don't send any other messages to the MS */ |
| 495 | |
| 496 | return gsm48_gmm_sendmsg(msg, 1, mm); |
| 497 | } |
| 498 | |
| 499 | /* Section 9.4.11: Authentication and Ciphering Reject */ |
| 500 | static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) |
| 501 | { |
| 502 | struct msgb *msg = gsm48_msgb_alloc(); |
| 503 | struct gsm48_hdr *gh; |
| 504 | |
| 505 | DEBUGP(DMM, "<- GPRS AUTH AND CIPH REJECT\n"); |
| 506 | |
| 507 | mmctx2msgid(msg, mm); |
| 508 | |
| 509 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 510 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 511 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; |
| 512 | |
| 513 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 514 | } |
| 515 | |
| 516 | /* Section 9.4.10: Authentication and Ciphering Response */ |
| 517 | static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, |
| 518 | struct msgb *msg) |
| 519 | { |
| 520 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 521 | struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; |
| 522 | struct tlv_parsed tp; |
| 523 | int rc; |
| 524 | |
| 525 | /* FIXME: Stop T3360 */ |
| 526 | |
| 527 | rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, |
| 528 | (msg->data + msg->len) - acr->data, 0, 0); |
| 529 | |
| 530 | /* FIXME: compare ac_ref? */ |
| 531 | |
| 532 | if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || |
| 533 | !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV)) { |
| 534 | /* FIXME: missing mandatory IE */ |
| 535 | } |
| 536 | |
| 537 | /* FIXME: compare SRES with what we expected */ |
| 538 | /* FIXME: enable LLC cipheirng */ |
| 539 | return 0; |
| 540 | } |
| 541 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 542 | /* Check if we can already authorize a subscriber */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 543 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx, |
| 544 | enum gprs_t3350_mode t3350_mode) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 545 | { |
| 546 | if (strlen(ctx->imei) && strlen(ctx->imsi)) { |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 547 | #ifdef PTMSI_ALLOC |
| 548 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 549 | ctx->t3350_mode = t3350_mode; |
| 550 | mmctx_timer_start(ctx, 3350, GSM0408_T3350_SECS); |
| 551 | #endif |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 552 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 553 | return gsm48_tx_gmm_att_ack(ctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 554 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 555 | if (!strlen(ctx->imei)) { |
| 556 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 557 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
| 558 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 559 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 560 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 561 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 562 | if (!strlen(ctx->imsi)) { |
| 563 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 564 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
| 565 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 566 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 567 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 568 | |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 573 | static int gsm48_rx_gmm_id_resp(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 574 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 575 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 576 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 577 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 578 | |
| 579 | gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 580 | DEBUGP(DMM, "-> GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s) ", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 581 | mi_type, mi_string); |
| 582 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 583 | if (!ctx) { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 584 | DEBUGP(DMM, "from unknown TLLI 0x%08x?!?\n", msgb_tlli(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 585 | return -EINVAL; |
| 586 | } |
| 587 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 588 | if (mi_type == ctx->t3370_id_type) |
| 589 | mmctx_timer_stop(ctx, 3370); |
| 590 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 591 | switch (mi_type) { |
| 592 | case GSM_MI_TYPE_IMSI: |
| 593 | /* we already have a mm context with current TLLI, but no |
| 594 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 595 | * this initial context with data from the HLR */ |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 596 | if (strlen(ctx->imsi) == 0) { |
| 597 | /* Check if we already have a MM context for this IMSI */ |
| 598 | struct sgsn_mm_ctx *ictx; |
| 599 | ictx = sgsn_mm_ctx_by_imsi(mi_string); |
| 600 | if (ictx) { |
| 601 | DEBUGP(DMM, "Deleting old MM Context for same IMSI ", |
| 602 | "p_tmsi_old=0x%08x, p_tmsi_new=0x%08x\n", |
| 603 | ictx->p_tmsi, ctx->p_tmsi); |
| 604 | gprs_llgmm_assign(ictx->llme, ictx->tlli, |
| 605 | 0xffffffff, GPRS_ALGO_GEA0, NULL); |
| 606 | sgsn_mm_ctx_free(ictx); |
| 607 | } |
| 608 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 609 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imei)); |
| 610 | break; |
| 611 | case GSM_MI_TYPE_IMEI: |
| 612 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei)); |
| 613 | break; |
| 614 | case GSM_MI_TYPE_IMEISV: |
| 615 | break; |
| 616 | } |
| 617 | |
| 618 | DEBUGPC(DMM, "\n"); |
| 619 | /* Check if we can let the mobile station enter */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 620 | return gsm48_gmm_authorize(ctx, ctx->t3350_mode); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | /* Section 9.4.1 Attach request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 624 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 625 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 626 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 627 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 628 | uint8_t *cur = gh->data, *msnc, *mi, *old_ra_info, *ms_ra_acc_cap; |
| 629 | uint8_t msnc_len, att_type, mi_len, mi_type, ms_ra_acc_cap_len; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 630 | uint16_t drx_par; |
| 631 | uint32_t tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 632 | char mi_string[GSM48_MI_SIZE]; |
| 633 | struct gprs_ra_id ra_id; |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 634 | uint16_t cid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 635 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 636 | DEBUGP(DMM, "-> GMM ATTACH REQUEST "); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 637 | |
| 638 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 639 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 640 | * or with random TLLI. */ |
| 641 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 642 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 643 | |
| 644 | /* MS network capability 10.5.5.12 */ |
| 645 | msnc_len = *cur++; |
| 646 | msnc = cur; |
Harald Welte | abe0613 | 2010-07-03 21:20:06 +0200 | [diff] [blame] | 647 | if (msnc_len > 8) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 648 | goto err_inval; |
| 649 | cur += msnc_len; |
| 650 | |
| 651 | /* aTTACH Type 10.5.5.2 */ |
| 652 | att_type = *cur++ & 0x0f; |
| 653 | |
| 654 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 655 | drx_par = *cur++ << 8; |
| 656 | drx_par |= *cur++; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 657 | |
| 658 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 659 | mi_len = *cur++; |
| 660 | mi = cur; |
| 661 | if (mi_len > 8) |
| 662 | goto err_inval; |
| 663 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 664 | cur += mi_len; |
| 665 | |
| 666 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 667 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 668 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 669 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 670 | |
| 671 | /* Old routing area identification 10.5.5.15 */ |
| 672 | old_ra_info = cur; |
| 673 | cur += 6; |
| 674 | |
| 675 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 676 | ms_ra_acc_cap_len = *cur++; |
| 677 | ms_ra_acc_cap = cur; |
Harald Welte | abe0613 | 2010-07-03 21:20:06 +0200 | [diff] [blame] | 678 | if (ms_ra_acc_cap_len > 51) |
| 679 | goto err_inval; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 680 | |
| 681 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 682 | |
| 683 | switch (mi_type) { |
| 684 | case GSM_MI_TYPE_IMSI: |
| 685 | /* Try to find MM context based on IMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 686 | if (!ctx) |
| 687 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 688 | if (!ctx) { |
| 689 | #if 0 |
| 690 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 691 | #else |
Harald Welte | f8ff153 | 2010-12-24 15:39:08 +0100 | [diff] [blame] | 692 | /* As a temorary hack, we simply assume that the IMSI exists, |
| 693 | * as long as it is part of 'our' network */ |
| 694 | char mccmnc[16]; |
| 695 | snprintf(mccmnc, sizeof(mccmnc), "%03d%02d", ra_id.mcc, ra_id.mnc); |
| 696 | if (strncmp(mccmnc, mi_string, 5)) { |
| 697 | LOGP(DMM, LOGL_INFO, "Rejecting ATTACH REQUESET IMSI=%s\n", |
| 698 | mi_string); |
| 699 | return gsm48_tx_gmm_att_rej_oldmsg(msg, |
| 700 | GMM_CAUSE_GPRS_NOTALLOWED); |
| 701 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 702 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
| 703 | if (!ctx) |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 704 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_NET_FAIL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 705 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
| 706 | #endif |
| 707 | } |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 708 | ctx->tlli = msgb_tlli(msg); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 709 | ctx->llme = llme; |
Harald Welte | 5c23bfc | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 710 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 711 | break; |
| 712 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 713 | memcpy(&tmsi, mi+1, 4); |
| 714 | tmsi = ntohl(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 715 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 716 | if (!ctx) |
| 717 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 718 | if (!ctx) { |
Harald Welte | c6e196f | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 719 | /* Allocate a context as most of our code expects one. |
| 720 | * Context will not have an IMSI ultil ID RESP is received */ |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 721 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 722 | ctx->p_tmsi = tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 723 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 724 | ctx->tlli = msgb_tlli(msg); |
| 725 | ctx->llme = llme; |
| 726 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 727 | break; |
| 728 | default: |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 729 | LOGP(DMM, LOGL_NOTICE, "Rejecting ATTACH REQUEST with " |
| 730 | "MI type %u\n", mi_type); |
| 731 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 732 | } |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 733 | /* Update MM Context with currient RA and Cell ID */ |
| 734 | ctx->ra = ra_id; |
| 735 | ctx->cell_id = cid; |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 736 | /* Update MM Context with other data */ |
| 737 | ctx->drx_parms = drx_par; |
| 738 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
| 739 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, ms_ra_acc_cap_len); |
| 740 | ctx->ms_network_capa.len = msnc_len; |
| 741 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
| 742 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 743 | #ifdef PTMSI_ALLOC |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 744 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 745 | ctx->p_tmsi_old = ctx->p_tmsi; |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 746 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 747 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 748 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 749 | * foreign TLLI to local TLLI */ |
| 750 | ctx->tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 751 | |
| 752 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | 0c4304f | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 753 | gprs_llgmm_assign(ctx->llme, ctx->tlli, ctx->tlli_new, |
| 754 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 755 | |
| 756 | DEBUGPC(DMM, "\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 757 | return ctx ? gsm48_gmm_authorize(ctx, GMM_T3350_MODE_ATT) : 0; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 758 | |
| 759 | err_inval: |
| 760 | DEBUGPC(DMM, "\n"); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 761 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_SEM_INCORR_MSG); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 762 | } |
| 763 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 764 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 765 | static int gsm48_rx_gmm_det_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 766 | { |
| 767 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | e25385b | 2010-06-28 19:11:41 +0200 | [diff] [blame] | 768 | struct sgsn_pdp_ctx *pdp, *pdp2; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 769 | uint8_t detach_type, power_off; |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 770 | int rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 771 | |
| 772 | detach_type = gh->data[0] & 0x7; |
| 773 | power_off = gh->data[0] & 0x8; |
| 774 | |
| 775 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
| 776 | |
| 777 | DEBUGP(DMM, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", |
| 778 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 779 | power_off ? "Power-off" : ""); |
| 780 | |
| 781 | /* Mark MM state as deregistered */ |
| 782 | ctx->mm_state = GMM_DEREGISTERED; |
| 783 | |
Harald Welte | e25385b | 2010-06-28 19:11:41 +0200 | [diff] [blame] | 784 | /* delete all existing PDP contexts for this MS */ |
| 785 | llist_for_each_entry_safe(pdp, pdp2, &ctx->pdp_list, list) { |
| 786 | LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u " |
| 787 | "due to GPRS DETACH REQUEST\n", pdp->nsapi); |
| 788 | sgsn_delete_pdp_ctx(pdp); |
| 789 | /* FIXME: the callback wants to transmit a DEACT PDP CTX ACK, |
| 790 | * which is quite stupid for a MS that has just detached.. */ |
| 791 | } |
| 792 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 793 | /* force_stby = 0 */ |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 794 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 795 | |
| 796 | /* TLLI unassignment */ |
Harald Welte | 0c4304f | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 797 | gprs_llgmm_assign(ctx->llme, ctx->tlli, 0xffffffff, |
| 798 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 309b593 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 799 | |
| 800 | return rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 801 | } |
| 802 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 803 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 804 | static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 805 | { |
| 806 | struct msgb *msg = gsm48_msgb_alloc(); |
| 807 | struct gsm48_hdr *gh; |
| 808 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 809 | uint8_t *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 810 | |
| 811 | DEBUGP(DMM, "<- ROUTING AREA UPDATE ACCEPT\n"); |
| 812 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 813 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 814 | |
| 815 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 816 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 817 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 818 | |
| 819 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 820 | rua->force_stby = 0; /* not indicated */ |
| 821 | rua->upd_result = 0; /* RA updated */ |
| 822 | rua->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 823 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 824 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 825 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 826 | #if 0 |
| 827 | /* Optional: P-TMSI signature */ |
| 828 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 829 | ptsig = msgb_put(msg, 3); |
| 830 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 831 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 832 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 833 | #endif |
| 834 | |
| 835 | #ifdef PTMSI_ALLOC |
| 836 | /* Optional: Allocated P-TMSI */ |
| 837 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 838 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 839 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 840 | #endif |
| 841 | |
| 842 | /* Option: MS ID, ... */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 843 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 844 | } |
| 845 | |
| 846 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 847 | static int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 848 | { |
| 849 | struct msgb *msg = gsm48_msgb_alloc(); |
| 850 | struct gsm48_hdr *gh; |
| 851 | |
| 852 | DEBUGP(DMM, "<- ROUTING AREA UPDATE REJECT\n"); |
| 853 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 854 | gmm_copy_id(msg, old_msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 855 | |
| 856 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 857 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 858 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 859 | gh->data[0] = cause; |
| 860 | gh->data[1] = 0; /* ? */ |
| 861 | |
| 862 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 863 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 864 | } |
| 865 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 866 | static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, |
| 867 | uint16_t pdp_status) |
| 868 | { |
| 869 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 870 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 871 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 872 | * shall deactivate all those PDP contexts locally (without peer to |
| 873 | * peer signalling between the MS and the network), which are not in SM |
| 874 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 875 | * being in state PDP-INACTIVE. */ |
| 876 | |
| 877 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
| 878 | if (!(pdp_status & (1 << pdp->nsapi))) { |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 879 | LOGP(DMM, LOGL_NOTICE, "Dropping PDP context for NSAPI=%u " |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 880 | "due to PDP CTX STATUS IE= 0x%04x\n", |
| 881 | pdp->nsapi, pdp_status); |
| 882 | sgsn_delete_pdp_ctx(pdp); |
| 883 | } |
| 884 | } |
| 885 | } |
| 886 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 887 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 888 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 889 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 890 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 891 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 892 | uint8_t *cur = gh->data; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 893 | uint8_t *ms_ra_acc_cap; |
| 894 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 895 | struct gprs_ra_id old_ra_id; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 896 | struct tlv_parsed tp; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 897 | uint8_t upd_type; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 898 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 899 | |
| 900 | /* Update Type 10.5.5.18 */ |
| 901 | upd_type = *cur++ & 0x0f; |
| 902 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 903 | DEBUGP(DMM, "-> GMM RA UPDATE REQUEST type=\"%s\" ", |
| 904 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 905 | |
| 906 | /* Old routing area identification 10.5.5.15 */ |
| 907 | gsm48_parse_ra(&old_ra_id, cur); |
| 908 | cur += 6; |
| 909 | |
| 910 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 911 | ms_ra_acc_cap_len = *cur++; |
| 912 | ms_ra_acc_cap = cur; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 913 | |
| 914 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 915 | * DRX parameter, MS network capability */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 916 | rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
| 917 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 918 | |
| 919 | switch (upd_type) { |
| 920 | case GPRS_UPD_T_RA_LA: |
| 921 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
| 922 | DEBUGPC(DMM, " unsupported in Mode III, is your SI13 corrupt?\n"); |
| 923 | return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_PROTO_ERR_UNSPEC); |
| 924 | break; |
| 925 | case GPRS_UPD_T_RA: |
| 926 | case GPRS_UPD_T_PERIODIC: |
| 927 | break; |
| 928 | } |
| 929 | |
| 930 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Harald Welte | 51f78ee | 2010-12-23 23:34:43 +0100 | [diff] [blame] | 931 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 932 | if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) { |
| 933 | /* The MS has to perform GPRS attach */ |
| 934 | DEBUGPC(DMM, " REJECT\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 935 | /* Device is still IMSI atached for CS but initiate GPRS ATTACH */ |
| 936 | return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 937 | } |
| 938 | |
Harald Welte | 66d062a | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 939 | /* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */ |
| 940 | msgid2mmctx(mmctx, msg); |
| 941 | /* Bump the statistics of received signalling msgs for this MM context */ |
| 942 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 943 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 944 | /* Update the MM context with the new RA-ID */ |
| 945 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
Harald Welte | 66d062a | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 946 | /* Update the MM context with the new (i.e. foreign) TLLI */ |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 947 | mmctx->tlli = msgb_tlli(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 948 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 949 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 950 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 951 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 952 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 953 | DEBUGPC(DMM, " ACCEPT\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 954 | #ifdef PTMSI_ALLOC |
| 955 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 956 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 957 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 958 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
| 959 | mmctx_timer_start(mmctx, 3350, GSM0408_T3350_SECS); |
| 960 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 961 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 962 | * foreign TLLI to local TLLI */ |
| 963 | mmctx->tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 964 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 965 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | 0c4304f | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 966 | gprs_llgmm_assign(mmctx->llme, mmctx->tlli, mmctx->tlli_new, |
| 967 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 968 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 969 | /* Look at PDP Context Status IE and see if MS's view of |
| 970 | * activated/deactivated NSAPIs agrees with our view */ |
| 971 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
| 972 | uint16_t pdp_status = ntohs(*(uint16_t *) |
| 973 | TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)); |
| 974 | process_ms_ctx_status(mmctx, pdp_status); |
| 975 | } |
| 976 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 977 | /* Send RA UPDATE ACCEPT */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 978 | return gsm48_tx_gmm_ra_upd_ack(mmctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 979 | } |
| 980 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 981 | static int gsm48_rx_gmm_status(struct sgsn_mm_ctx *mmctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 982 | { |
| 983 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 984 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 985 | DEBUGP(DMM, "-> GPRS MM STATUS (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 986 | get_value_string(gmm_cause_names, gh->data[0])); |
| 987 | |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | /* GPRS Mobility Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 992 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 993 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 994 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 995 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 996 | int rc; |
| 997 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 998 | /* MMCTX can be NULL when called */ |
| 999 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1000 | if (!mmctx && |
| 1001 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1002 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1003 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1004 | return gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1005 | } |
| 1006 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1007 | switch (gh->msg_type) { |
| 1008 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1009 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1010 | break; |
| 1011 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1012 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1013 | break; |
| 1014 | case GSM48_MT_GMM_ID_RESP: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1015 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1016 | break; |
| 1017 | case GSM48_MT_GMM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1018 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1019 | break; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1020 | case GSM48_MT_GMM_DETACH_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1021 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1022 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1023 | case GSM48_MT_GMM_ATTACH_COMPL: |
| 1024 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1025 | DEBUGP(DMM, "-> ATTACH COMPLETE\n"); |
| 1026 | mmctx_timer_stop(mmctx, 3350); |
| 1027 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1028 | /* Unassign the old TLLI */ |
| 1029 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | 0c4304f | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1030 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1031 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1032 | break; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1033 | case GSM48_MT_GMM_RA_UPD_COMPL: |
| 1034 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1035 | DEBUGP(DMM, "-> ROUTEING AREA UPDATE COMPLETE\n"); |
| 1036 | mmctx_timer_stop(mmctx, 3350); |
| 1037 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1038 | /* Unassign the old TLLI */ |
| 1039 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | 0c4304f | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1040 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1041 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1042 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1043 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1044 | DEBUGP(DMM, "-> PTMSI REALLLICATION COMPLETE\n"); |
| 1045 | mmctx_timer_stop(mmctx, 3350); |
| 1046 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1047 | /* Unassign the old TLLI */ |
| 1048 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | 0c4304f | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1049 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, GPRS_ALGO_GEA0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1050 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1051 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1052 | rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1053 | break; |
| 1054 | default: |
| 1055 | DEBUGP(DMM, "Unknown GSM 04.08 GMM msg type 0x%02x\n", |
| 1056 | gh->msg_type); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1057 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1058 | break; |
| 1059 | } |
| 1060 | |
| 1061 | return rc; |
| 1062 | } |
| 1063 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1064 | static void mmctx_timer_cb(void *_mm) |
| 1065 | { |
| 1066 | struct sgsn_mm_ctx *mm = _mm; |
| 1067 | |
| 1068 | mm->num_T_exp++; |
| 1069 | |
| 1070 | switch (mm->T) { |
| 1071 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 1072 | if (mm->num_T_exp >= 5) { |
| 1073 | LOGP(DMM, LOGL_NOTICE, "T3350 expired >= 5 times\n"); |
| 1074 | mm->mm_state = GMM_DEREGISTERED; |
| 1075 | /* FIXME: should we return some error? */ |
| 1076 | break; |
| 1077 | } |
| 1078 | /* re-transmit the respective msg and re-start timer */ |
| 1079 | switch (mm->t3350_mode) { |
| 1080 | case GMM_T3350_MODE_ATT: |
| 1081 | gsm48_tx_gmm_att_ack(mm); |
| 1082 | break; |
| 1083 | case GMM_T3350_MODE_RAU: |
| 1084 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 1085 | break; |
| 1086 | case GMM_T3350_MODE_PTMSI_REALL: |
| 1087 | /* FIXME */ |
| 1088 | break; |
| 1089 | } |
| 1090 | bsc_schedule_timer(&mm->timer, GSM0408_T3350_SECS, 0); |
| 1091 | break; |
Harald Welte | 45fcf68 | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1092 | case 3360: /* waiting for AUTH AND CIPH RESP */ |
| 1093 | if (mm->num_T_exp >= 5) { |
| 1094 | LOGP(DMM, LOGL_NOTICE, "T3360 expired >= 5 times\n"); |
| 1095 | mm->mm_state = GMM_DEREGISTERED; |
| 1096 | break; |
| 1097 | } |
| 1098 | /* FIXME: re-transmit the respective msg and re-start timer */ |
| 1099 | bsc_schedule_timer(&mm->timer, GSM0408_T3360_SECS, 0); |
| 1100 | break; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1101 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 1102 | if (mm->num_T_exp >= 5) { |
| 1103 | LOGP(DMM, LOGL_NOTICE, "T3370 expired >= 5 times\n"); |
| 1104 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
| 1105 | mm->mm_state = GMM_DEREGISTERED; |
| 1106 | break; |
| 1107 | } |
| 1108 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 1109 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
| 1110 | bsc_schedule_timer(&mm->timer, GSM0408_T3370_SECS, 0); |
| 1111 | break; |
| 1112 | default: |
| 1113 | LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n", |
| 1114 | mm->T); |
| 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | /* GPRS SESSION MANAGEMENT */ |
| 1119 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1120 | static void pdpctx_timer_cb(void *_mm); |
| 1121 | |
| 1122 | static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, |
| 1123 | unsigned int seconds) |
| 1124 | { |
| 1125 | if (bsc_timer_pending(&pdp->timer)) |
| 1126 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 1127 | "timer %u pending\n", T, pdp->T); |
| 1128 | pdp->T = T; |
| 1129 | pdp->num_T_exp = 0; |
| 1130 | |
| 1131 | /* FIXME: we should do this only once ? */ |
| 1132 | pdp->timer.data = pdp; |
| 1133 | pdp->timer.cb = &pdpctx_timer_cb; |
| 1134 | |
| 1135 | bsc_schedule_timer(&pdp->timer, seconds, 0); |
| 1136 | } |
| 1137 | |
| 1138 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1139 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 1140 | { |
| 1141 | uint8_t v[6]; |
| 1142 | |
| 1143 | v[0] = PDP_TYPE_ORG_IETF; |
| 1144 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 1145 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 1146 | |
| 1147 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1148 | } |
| 1149 | |
| 1150 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 1151 | { |
| 1152 | uint8_t v[2]; |
| 1153 | |
| 1154 | v[0] = PDP_TYPE_ORG_ETSI; |
| 1155 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 1156 | |
| 1157 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1158 | } |
| 1159 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1160 | /* Section 9.5.2: Ativate PDP Context Accept */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1161 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1162 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1163 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1164 | struct gsm48_hdr *gh; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1165 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1166 | |
| 1167 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT ACK\n"); |
| 1168 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1169 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1170 | |
| 1171 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1172 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1173 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1174 | |
| 1175 | /* Negotiated LLC SAPI */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1176 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1177 | |
Harald Welte | 540dcbc | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 1178 | /* FIXME: copy QoS parameters from original request */ |
| 1179 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 1180 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1181 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1182 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1183 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1184 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1185 | /* PDP address */ |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1186 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 1187 | * the IE is identical with the 04.08 PDP Address IE */ |
| 1188 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1189 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 1190 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1191 | pdp->lib->eua.v[0] |= 0xf0; |
| 1192 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1193 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
| 1194 | if (pdp->lib->pco_req.l && pdp->lib->pco_req.v) |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1195 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | f2d6658 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 1196 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1197 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1198 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1199 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1200 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1201 | } |
| 1202 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1203 | /* Section 9.5.3: Activate PDP Context reject */ |
| 1204 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1205 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 1206 | { |
| 1207 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1208 | struct gsm48_hdr *gh; |
| 1209 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1210 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1211 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1212 | |
| 1213 | mmctx2msgid(msg, mm); |
| 1214 | |
| 1215 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1216 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1217 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 1218 | |
| 1219 | msgb_v_put(msg, cause); |
| 1220 | if (pco_len && pco_v) |
| 1221 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 1222 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1223 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1224 | } |
| 1225 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1226 | /* Section 9.5.8: Deactivate PDP Context Request */ |
| 1227 | static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1228 | uint8_t sm_cause) |
| 1229 | { |
| 1230 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1231 | struct gsm48_hdr *gh; |
| 1232 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1233 | |
| 1234 | DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT REQ\n"); |
| 1235 | |
| 1236 | mmctx2msgid(msg, mm); |
| 1237 | |
| 1238 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1239 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1240 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; |
| 1241 | |
| 1242 | msgb_v_put(msg, sm_cause); |
| 1243 | |
| 1244 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1245 | } |
| 1246 | int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause) |
| 1247 | { |
| 1248 | pdpctx_timer_start(pdp, 3395, GSM0408_T3395_SECS); |
| 1249 | |
| 1250 | return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause); |
| 1251 | } |
| 1252 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1253 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1254 | static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1255 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1256 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1257 | struct gsm48_hdr *gh; |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1258 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1259 | |
| 1260 | DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
| 1261 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1262 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1263 | |
| 1264 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1265 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1266 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 1267 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1268 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1269 | } |
| 1270 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 1271 | { |
| 1272 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1273 | } |
| 1274 | |
| 1275 | /* Section 9.5.1: Activate PDP Context Request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1276 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 1277 | struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1278 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1279 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1280 | struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data; |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1281 | uint8_t req_qos_len, req_pdpa_len; |
| 1282 | uint8_t *req_qos, *req_pdpa; |
| 1283 | struct tlv_parsed tp; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1284 | uint8_t transaction_id = (gh->proto_discr >> 4); |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1285 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1286 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1287 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1288 | DEBUGP(DMM, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
| 1289 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1290 | |
Harald Welte | b7b0fd7 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1291 | /* FIXME: length checks! */ |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1292 | req_qos_len = act_req->data[0]; |
| 1293 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 1294 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 1295 | req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1296 | |
Harald Welte | b7b0fd7 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1297 | /* Optional: Access Point Name, Protocol Config Options */ |
| 1298 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 1299 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 1300 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 1301 | else |
| 1302 | memset(&tp, 0, sizeof(tp)); |
| 1303 | |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1304 | switch (req_pdpa[0] & 0xf) { |
| 1305 | case 0x0: |
| 1306 | DEBUGPC(DMM, "ETSI "); |
| 1307 | break; |
| 1308 | case 0x1: |
| 1309 | DEBUGPC(DMM, "IETF "); |
| 1310 | break; |
| 1311 | case 0xf: |
| 1312 | DEBUGPC(DMM, "Empty "); |
| 1313 | break; |
| 1314 | } |
| 1315 | |
| 1316 | switch (req_pdpa[1]) { |
| 1317 | case 0x21: |
| 1318 | DEBUGPC(DMM, "IPv4 "); |
| 1319 | if (req_pdpa_len >= 6) { |
| 1320 | struct in_addr ia; |
| 1321 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 1322 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 1323 | } |
| 1324 | break; |
| 1325 | case 0x57: |
| 1326 | DEBUGPC(DMM, "IPv6 "); |
| 1327 | if (req_pdpa_len >= 18) { |
| 1328 | /* FIXME: print IPv6 address */ |
| 1329 | } |
| 1330 | break; |
| 1331 | default: |
| 1332 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 1333 | break; |
| 1334 | } |
| 1335 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1336 | DEBUGPC(DMM, "\n"); |
| 1337 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1338 | /* put the non-TLV elements in the TLV parser structure to |
| 1339 | * pass them on to the SGSN / GTP code */ |
| 1340 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 1341 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 1342 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 1343 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 1344 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1345 | /* FIXME: determine GGSN based on APN and subscription options */ |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1346 | if (TLVP_PRESENT(&tp, GSM48_IE_GSM_APN)) {} |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1347 | |
| 1348 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 1349 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 1350 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 1351 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1352 | GSM_CAUSE_INV_MAND_INFO, |
| 1353 | 0, NULL); |
| 1354 | } |
| 1355 | |
| 1356 | /* Check if NSAPI is already in use */ |
Harald Welte | 5fbac98 | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 1357 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 1358 | if (pdp) { |
| 1359 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 1360 | if (pdp->sapi == act_req->req_llc_sapi && |
| 1361 | pdp->ti == transaction_id) { |
| 1362 | /* This apparently is a re-transmission of a PDP CTX |
| 1363 | * ACT REQ (our ACT ACK must have got dropped) */ |
| 1364 | return gsm48_tx_gsm_act_pdp_acc(pdp); |
| 1365 | } |
| 1366 | |
| 1367 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1368 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1369 | GSM_CAUSE_NSAPI_IN_USE, |
| 1370 | 0, NULL); |
| 1371 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1372 | |
Harald Welte | a456a23 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 1373 | /* Only increment counter for a real activation, after we checked |
| 1374 | * for re-transmissions */ |
| 1375 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 1376 | |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1377 | ggsn = sgsn_ggsn_ctx_by_id(0); |
| 1378 | if (!ggsn) { |
| 1379 | LOGP(DGPRS, LOGL_ERROR, "No GGSN context 0 found!\n"); |
| 1380 | return -EIO; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1381 | } |
Harald Welte | 8bf65d0 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1382 | ggsn->gsn = sgsn->gsn; |
| 1383 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, act_req->req_nsapi, &tp); |
| 1384 | if (!pdp) |
| 1385 | return -1; |
| 1386 | |
| 1387 | /* Store SAPI and Transaction Identifier */ |
| 1388 | pdp->sapi = act_req->req_llc_sapi; |
| 1389 | pdp->ti = transaction_id; |
| 1390 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1391 | return 0; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1392 | } |
| 1393 | |
| 1394 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1395 | static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1396 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1397 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1398 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1399 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1400 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1401 | DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1402 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1403 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1404 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1405 | if (!pdp) { |
| 1406 | LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Request for " |
| 1407 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1408 | mm->imsi, transaction_id); |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1409 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1410 | } |
| 1411 | |
| 1412 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1413 | } |
| 1414 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1415 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
| 1416 | static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) |
| 1417 | { |
| 1418 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 1419 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1420 | struct sgsn_pdp_ctx *pdp; |
| 1421 | |
| 1422 | DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT ACK\n"); |
| 1423 | |
| 1424 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1425 | if (!pdp) { |
| 1426 | LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Accept for " |
| 1427 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1428 | mm->imsi, transaction_id); |
| 1429 | return 0; |
| 1430 | } |
| 1431 | |
| 1432 | return sgsn_delete_pdp_ctx(pdp); |
| 1433 | } |
| 1434 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1435 | static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1436 | { |
| 1437 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1438 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1439 | DEBUGP(DMM, "-> GPRS SM STATUS (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1440 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1441 | |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1445 | static void pdpctx_timer_cb(void *_pdp) |
| 1446 | { |
| 1447 | struct sgsn_pdp_ctx *pdp = _pdp; |
| 1448 | |
| 1449 | pdp->num_T_exp++; |
| 1450 | |
| 1451 | switch (pdp->T) { |
| 1452 | case 3395: /* waiting for PDP CTX DEACT ACK */ |
| 1453 | if (pdp->num_T_exp >= 4) { |
| 1454 | LOGP(DMM, LOGL_NOTICE, "T3395 expired >= 5 times\n"); |
| 1455 | pdp->state = PDP_STATE_INACTIVE; |
| 1456 | sgsn_delete_pdp_ctx(pdp); |
| 1457 | break; |
| 1458 | } |
| 1459 | gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); |
| 1460 | bsc_schedule_timer(&pdp->timer, GSM0408_T3395_SECS, 0); |
| 1461 | break; |
| 1462 | default: |
| 1463 | LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n", |
| 1464 | pdp->T); |
| 1465 | } |
| 1466 | } |
| 1467 | |
| 1468 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1469 | /* GPRS Session Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1470 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1471 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1472 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1473 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1474 | int rc; |
| 1475 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1476 | /* MMCTX can be NULL when called */ |
| 1477 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1478 | if (!mmctx) { |
| 1479 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Harald Welte | ef7157f | 2010-07-02 16:18:18 +0200 | [diff] [blame] | 1480 | gsm48_tx_gmm_status_oldmsg(msg, GMM_CAUSE_IMPL_DETACHED); |
| 1481 | return gsm48_tx_sm_status_oldmsg(msg, GSM_CAUSE_PROTO_ERR_UNSPEC); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1482 | } |
| 1483 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1484 | switch (gh->msg_type) { |
| 1485 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1486 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1487 | break; |
| 1488 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1489 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1490 | break; |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1491 | case GSM48_MT_GSM_DEACT_PDP_ACK: |
| 1492 | rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); |
| 1493 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1494 | case GSM48_MT_GSM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1495 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1496 | break; |
| 1497 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 1498 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 1499 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
| 1500 | DEBUGP(DMM, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n", |
| 1501 | gh->msg_type); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1502 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1503 | break; |
| 1504 | default: |
| 1505 | DEBUGP(DMM, "Unknown GSM 04.08 GSM msg type 0x%02x\n", |
| 1506 | gh->msg_type); |
Harald Welte | 263edd1 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1507 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1508 | break; |
| 1509 | |
| 1510 | } |
| 1511 | |
| 1512 | return rc; |
| 1513 | } |
| 1514 | |
| 1515 | /* Main entry point for incoming 04.08 GPRS messages */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1516 | int gsm0408_gprs_rcvmsg(struct msgb *msg, struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1517 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1518 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1519 | uint8_t pdisc = gh->proto_discr & 0x0f; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1520 | struct sgsn_mm_ctx *mmctx; |
| 1521 | struct gprs_ra_id ra_id; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1522 | int rc = -EINVAL; |
| 1523 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1524 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 1525 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1526 | if (mmctx) { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1527 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1528 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1529 | mmctx->llme = llme; |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1530 | } |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1531 | |
| 1532 | /* MMCTX can be NULL */ |
| 1533 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1534 | switch (pdisc) { |
| 1535 | case GSM48_PDISC_MM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1536 | rc = gsm0408_rcv_gmm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1537 | break; |
| 1538 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1539 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1540 | break; |
| 1541 | default: |
| 1542 | DEBUGP(DMM, "Unknown GSM 04.08 discriminator 0x%02x\n", |
| 1543 | pdisc); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1544 | /* FIXME: return status message */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1545 | break; |
| 1546 | } |
| 1547 | |
| 1548 | return rc; |
| 1549 | } |
Harald Welte | 5026482 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1550 | |
| 1551 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 1552 | { |
| 1553 | struct sgsn_mm_ctx *mmctx; |
| 1554 | |
| 1555 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1556 | if (!mmctx) { |
| 1557 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 1558 | "TLLI=%08x\n", tlli); |
| 1559 | return -EINVAL; |
| 1560 | } |
| 1561 | |
| 1562 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL) { |
| 1563 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request while state " |
| 1564 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 1565 | return -EINVAL; |
| 1566 | } |
| 1567 | |
| 1568 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
| 1569 | mmctx->mm_state = GMM_REGISTERED_SUSPENDED; |
| 1570 | return 0; |
| 1571 | } |
| 1572 | |
| 1573 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 1574 | uint8_t suspend_ref) |
| 1575 | { |
| 1576 | struct sgsn_mm_ctx *mmctx; |
| 1577 | |
| 1578 | /* FIXME: make use of suspend reference? */ |
| 1579 | |
| 1580 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1581 | if (!mmctx) { |
| 1582 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 1583 | "TLLI=%08x\n", tlli); |
| 1584 | return -EINVAL; |
| 1585 | } |
| 1586 | |
| 1587 | if (mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
| 1588 | LOGP(DMM, LOGL_NOTICE, "RESUME request while state " |
| 1589 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 1590 | /* FIXME: should we not simply ignore it? */ |
| 1591 | return -EINVAL; |
| 1592 | } |
| 1593 | |
| 1594 | /* Transition from SUSPENDED to NORMAL */ |
| 1595 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
| 1596 | return 0; |
| 1597 | } |