Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 4 | /* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 28 | #include <stdint.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 29 | #include <errno.h> |
| 30 | |
| 31 | #include <netinet/in.h> |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 32 | #include <arpa/inet.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 33 | |
| 34 | #include <openbsc/db.h> |
| 35 | #include <osmocore/msgb.h> |
| 36 | #include <osmocore/tlv.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 37 | #include <osmocore/gsm_utils.h> |
| 38 | #include <osmocore/signal.h> |
| 39 | #include <osmocore/talloc.h> |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 40 | #include <osmocore/rate_ctr.h> |
Harald Welte | e4cc19a | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 41 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 42 | #include <openbsc/debug.h> |
| 43 | #include <openbsc/gsm_data.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 44 | #include <openbsc/gsm_subscriber.h> |
| 45 | #include <openbsc/gsm_04_08.h> |
| 46 | #include <openbsc/gsm_04_08_gprs.h> |
| 47 | #include <openbsc/paging.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 48 | #include <openbsc/transaction.h> |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 49 | #include <openbsc/gprs_bssgp.h> |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 50 | #include <openbsc/gprs_llc.h> |
| 51 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 52 | #include <openbsc/gprs_gmm.h> |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 53 | #include <openbsc/sgsn.h> |
| 54 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 55 | #include <pdp.h> |
| 56 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 57 | #define PTMSI_ALLOC |
| 58 | |
| 59 | /* Section 11.2.2 / Table 11.4 MM timers netowkr side */ |
| 60 | #define GSM0408_T3322_SECS 6 /* DETACH_REQ -> DETACH_ACC */ |
| 61 | #define GSM0408_T3350_SECS 6 /* waiting for ATT/RAU/TMSI COMPL */ |
| 62 | #define GSM0408_T3360_SECS 6 /* waiting for AUTH/CIPH RESP */ |
| 63 | #define GSM0408_T3370_SECS 6 /* waiting for ID RESP */ |
| 64 | |
| 65 | /* Section 11.2.2 / Table 11.4a MM timers netowkr side */ |
| 66 | #define GSM0408_T3313_SECS 30 /* waiting for paging response */ |
| 67 | #define GSM0408_T3314_SECS 44 /* force to STBY on expiry */ |
| 68 | #define GSM0408_T3316_SECS 44 |
| 69 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 70 | extern struct sgsn_instance *sgsn; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 71 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 72 | /* Protocol related stuff, should go into libosmocore */ |
| 73 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 74 | /* 10.5.5.14 GPRS MM Cause / Table 10.5.147 */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 75 | const struct value_string gmm_cause_names[] = { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 76 | /* FIXME */ |
| 77 | { GMM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
| 78 | { GMM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 79 | { GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 80 | "Message type non-existant or not implemented" }, |
| 81 | { GMM_CAUSE_MSGT_INCOMP_P_STATE, |
| 82 | "Message type not compatible with protocol state" }, |
| 83 | { GMM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 84 | "Information element non-existent or not implemented" }, |
| 85 | { GMM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
| 86 | { GMM_CAUSE_MSG_INCOMP_P_STATE, |
| 87 | "Message not compatible with protocol state " }, |
| 88 | { GMM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
| 89 | { 0, NULL } |
| 90 | }; |
| 91 | |
| 92 | /* 10.5.6.6 SM Cause / Table 10.5.157 */ |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 93 | const struct value_string gsm_cause_names[] = { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 94 | { GSM_CAUSE_INSUFF_RSRC, "Insufficient resources" }, |
| 95 | { GSM_CAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 96 | { GSM_CAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 97 | { GSM_CAUSE_AUTH_FAILED, "User Authentication failed" }, |
| 98 | { GSM_CAUSE_ACT_REJ_GGSN, "Activation rejected by GGSN" }, |
| 99 | { GSM_CAUSE_ACT_REJ_UNSPEC, "Activation rejected, unspecified" }, |
| 100 | { GSM_CAUSE_SERV_OPT_NOTSUPP, "Service option not supported" }, |
| 101 | { GSM_CAUSE_REQ_SERV_OPT_NOTSUB, |
| 102 | "Requested service option not subscribed" }, |
| 103 | { GSM_CAUSE_SERV_OPT_TEMP_OOO, |
| 104 | "Service option temporarily out of order" }, |
| 105 | { GSM_CAUSE_NSAPI_IN_USE, "NSAPI already used" }, |
| 106 | { GSM_CAUSE_DEACT_REGULAR, "Regular deactivation" }, |
| 107 | { GSM_CAUSE_QOS_NOT_ACCEPTED, "QoS not accepted" }, |
| 108 | { GSM_CAUSE_NET_FAIL, "Network Failure" }, |
| 109 | { GSM_CAUSE_REACT_RQD, "Reactivation required" }, |
| 110 | { GSM_CAUSE_FEATURE_NOTSUPP, "Feature not supported " }, |
| 111 | { GSM_CAUSE_INVALID_TRANS_ID, "Invalid transaction identifier" }, |
| 112 | { GSM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
| 113 | { GSM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 114 | { GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 115 | "Message type non-existant or not implemented" }, |
| 116 | { GSM_CAUSE_MSGT_INCOMP_P_STATE, |
| 117 | "Message type not compatible with protocol state" }, |
| 118 | { GSM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 119 | "Information element non-existent or not implemented" }, |
| 120 | { GSM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
| 121 | { GSM_CAUSE_MSG_INCOMP_P_STATE, |
| 122 | "Message not compatible with protocol state " }, |
| 123 | { GSM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
| 124 | { 0, NULL } |
| 125 | }; |
| 126 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 127 | /* 10.5.5.2 */ |
| 128 | const struct value_string gprs_att_t_strs[] = { |
| 129 | { GPRS_ATT_T_ATTACH, "GPRS attach" }, |
| 130 | { GPRS_ATT_T_ATT_WHILE_IMSI, "GPRS attach while IMSI attached" }, |
| 131 | { GPRS_ATT_T_COMBINED, "Combined GPRS/IMSI attach" }, |
| 132 | { 0, NULL } |
| 133 | }; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 134 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 135 | const struct value_string gprs_upd_t_strs[] = { |
| 136 | { GPRS_UPD_T_RA, "RA updating" }, |
| 137 | { GPRS_UPD_T_RA_LA, "combined RA/LA updating" }, |
| 138 | { GPRS_UPD_T_RA_LA_IMSI_ATT, "combined RA/LA updating + IMSI attach" }, |
| 139 | { GPRS_UPD_T_PERIODIC, "periodic updating" }, |
| 140 | { 0, NULL } |
| 141 | }; |
| 142 | |
| 143 | /* 10.5.5.5 */ |
| 144 | const struct value_string gprs_det_t_mo_strs[] = { |
| 145 | { GPRS_DET_T_MO_GPRS, "GPRS detach" }, |
| 146 | { GPRS_DET_T_MO_IMSI, "IMSI detach" }, |
| 147 | { GPRS_DET_T_MO_COMBINED, "Combined GPRS/IMSI detach" }, |
| 148 | { 0, NULL } |
| 149 | }; |
| 150 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame^] | 151 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 152 | .def = { |
| 153 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 154 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
| 155 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_TV, 3 }, |
| 156 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_TV, 16 }, |
| 157 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_TV, 4 }, |
| 158 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
| 159 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_TV, 2 }, |
| 160 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 161 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 162 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 163 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 164 | }, |
| 165 | }; |
| 166 | |
| 167 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 168 | .def = { |
| 169 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 170 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 171 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 172 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 173 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 174 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
| 175 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_TV, 1 }, |
| 176 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_TV, 7 }, |
| 177 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 178 | }, |
| 179 | }; |
| 180 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 181 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 182 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 183 | static void mmctx_timer_cb(void *_mm); |
| 184 | |
| 185 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 186 | unsigned int seconds) |
| 187 | { |
| 188 | if (bsc_timer_pending(&mm->timer)) |
| 189 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 190 | "timer %u pending\n", T, mm->T); |
| 191 | mm->T = T; |
| 192 | mm->num_T_exp = 0; |
| 193 | |
| 194 | /* FIXME: we should do this only once ? */ |
| 195 | mm->timer.data = mm; |
| 196 | mm->timer.cb = &mmctx_timer_cb; |
| 197 | |
| 198 | bsc_schedule_timer(&mm->timer, seconds, 0); |
| 199 | } |
| 200 | |
| 201 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 202 | { |
| 203 | if (mm->T != T) |
| 204 | LOGP(DMM, LOGL_ERROR, "Stopping MM timer %u but " |
| 205 | "%u is running\n", T, mm->T); |
| 206 | bsc_del_timer(&mm->timer); |
| 207 | } |
| 208 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 209 | /* Send a message through the underlying layer */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 210 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
| 211 | const struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 212 | { |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 213 | if (mm) |
| 214 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
| 215 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 216 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 217 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 218 | } |
| 219 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 220 | /* copy identifiers from old message to new message, this |
| 221 | * is required so lower layers can route it correctly */ |
| 222 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 223 | { |
| 224 | msgb_tlli(msg) = msgb_tlli(old); |
| 225 | msgb_bvci(msg) = msgb_bvci(old); |
| 226 | msgb_nsei(msg) = msgb_nsei(old); |
| 227 | } |
| 228 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 229 | /* Store BVCI/NSEI in MM context */ |
| 230 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 231 | { |
| 232 | mm->bvci = msgb_bvci(msg); |
| 233 | mm->nsei = msgb_nsei(msg); |
| 234 | } |
| 235 | |
| 236 | /* Store BVCI/NSEI in MM context */ |
| 237 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 238 | { |
| 239 | msgb_tlli(msg) = mm->tlli; |
| 240 | msgb_bvci(msg) = mm->bvci; |
| 241 | msgb_nsei(msg) = mm->nsei; |
| 242 | } |
| 243 | |
Harald Welte | 242d172 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 244 | static struct gsm48_qos default_qos = { |
| 245 | .delay_class = 4, /* best effort */ |
| 246 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 247 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 248 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 249 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 250 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 251 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 252 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 253 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 254 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 255 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 256 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 257 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 258 | .handling_prio = 3, |
| 259 | .xfer_delay = 0x10, /* 200ms */ |
| 260 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 261 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 262 | .sig_ind = 0, /* not optimised for signalling */ |
| 263 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 264 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 265 | }; |
| 266 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 267 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 268 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 269 | { |
| 270 | struct msgb *msg = gsm48_msgb_alloc(); |
| 271 | struct gsm48_hdr *gh; |
| 272 | struct gsm48_attach_ack *aa; |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 273 | uint8_t *ptsig, *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 274 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 275 | 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] | 276 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 277 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 278 | |
| 279 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 280 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 281 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 282 | |
| 283 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 284 | aa->force_stby = 0; /* not indicated */ |
| 285 | aa->att_result = 1; /* GPRS only */ |
| 286 | aa->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
| 287 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 288 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 289 | |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 290 | #if 0 |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 291 | /* Optional: P-TMSI signature */ |
| 292 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 293 | ptsig = msgb_put(msg, 3); |
| 294 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 295 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 296 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 297 | |
| 298 | /* Optional: Negotiated Ready timer value */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 299 | #endif |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 300 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 301 | #ifdef PTMSI_ALLOC |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 302 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 303 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 304 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 305 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 306 | #endif |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 307 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 308 | /* Optional: MS-identity (combined attach) */ |
| 309 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 310 | |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 311 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 315 | 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] | 316 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 317 | struct gsm48_hdr *gh; |
| 318 | |
| 319 | DEBUGP(DMM, "<- GPRS ATTACH REJECT\n"); |
| 320 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 321 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 322 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 323 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 324 | gh->data[0] = gmm_cause; |
| 325 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 326 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 327 | } |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 328 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 329 | uint8_t gmm_cause) |
| 330 | { |
| 331 | struct msgb *msg = gsm48_msgb_alloc(); |
| 332 | gmm_copy_id(msg, old_msg); |
| 333 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 334 | } |
| 335 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 336 | uint8_t gmm_cause) |
| 337 | { |
| 338 | struct msgb *msg = gsm48_msgb_alloc(); |
| 339 | mmctx2msgid(msg, mm); |
| 340 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 341 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 342 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 343 | /* Chapter 9.4.6.2 Detach accept */ |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 344 | 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] | 345 | { |
| 346 | struct msgb *msg = gsm48_msgb_alloc(); |
| 347 | struct gsm48_hdr *gh; |
| 348 | |
| 349 | DEBUGP(DMM, "<- GPRS DETACH ACCEPT\n"); |
| 350 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 351 | mmctx2msgid(msg, mm); |
| 352 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 353 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 354 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 355 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 356 | gh->data[0] = force_stby; |
| 357 | |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 358 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 359 | } |
| 360 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 361 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 362 | 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] | 363 | { |
| 364 | struct msgb *msg = gsm48_msgb_alloc(); |
| 365 | struct gsm48_hdr *gh; |
| 366 | |
Harald Welte | 96cf248 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 367 | DEBUGP(DMM, "<- GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 368 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 369 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 370 | |
| 371 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 372 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 373 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 374 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 375 | gh->data[0] = id_type & 0xf; |
| 376 | |
Harald Welte | 96cf248 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 377 | return gsm48_gmm_sendmsg(msg, 1, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | /* Check if we can already authorize a subscriber */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 381 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx, |
| 382 | enum gprs_t3350_mode t3350_mode) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 383 | { |
| 384 | if (strlen(ctx->imei) && strlen(ctx->imsi)) { |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 385 | #ifdef PTMSI_ALLOC |
| 386 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 387 | ctx->t3350_mode = t3350_mode; |
| 388 | mmctx_timer_start(ctx, 3350, GSM0408_T3350_SECS); |
| 389 | #endif |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 390 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 391 | return gsm48_tx_gmm_att_ack(ctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 392 | } |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 393 | if (!strlen(ctx->imei)) { |
| 394 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 395 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
| 396 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 397 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 398 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 399 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 400 | if (!strlen(ctx->imsi)) { |
| 401 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
| 402 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
| 403 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 404 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 405 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 406 | |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 411 | 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] | 412 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 413 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 414 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 415 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 416 | |
| 417 | 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] | 418 | DEBUGP(DMM, "-> GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s) ", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 419 | mi_type, mi_string); |
| 420 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 421 | if (!ctx) { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 422 | DEBUGP(DMM, "from unknown TLLI 0x%08x?!?\n", msgb_tlli(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 423 | return -EINVAL; |
| 424 | } |
| 425 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 426 | if (mi_type == ctx->t3370_id_type) |
| 427 | mmctx_timer_stop(ctx, 3370); |
| 428 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 429 | switch (mi_type) { |
| 430 | case GSM_MI_TYPE_IMSI: |
| 431 | /* we already have a mm context with current TLLI, but no |
| 432 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 433 | * this initial context with data from the HLR */ |
| 434 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imei)); |
| 435 | break; |
| 436 | case GSM_MI_TYPE_IMEI: |
| 437 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei)); |
| 438 | break; |
| 439 | case GSM_MI_TYPE_IMEISV: |
| 440 | break; |
| 441 | } |
| 442 | |
| 443 | DEBUGPC(DMM, "\n"); |
| 444 | /* Check if we can let the mobile station enter */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 445 | return gsm48_gmm_authorize(ctx, ctx->t3350_mode); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | /* Section 9.4.1 Attach request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 449 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 450 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 451 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 452 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 453 | uint8_t *cur = gh->data, *msnc, *mi, *old_ra_info, *ms_ra_acc_cap; |
| 454 | 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] | 455 | uint16_t drx_par; |
| 456 | uint32_t tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 457 | char mi_string[GSM48_MI_SIZE]; |
| 458 | struct gprs_ra_id ra_id; |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 459 | uint16_t cid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 460 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 461 | DEBUGP(DMM, "-> GMM ATTACH REQUEST "); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 462 | |
| 463 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 464 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 465 | * or with random TLLI. */ |
| 466 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 467 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 468 | |
| 469 | /* MS network capability 10.5.5.12 */ |
| 470 | msnc_len = *cur++; |
| 471 | msnc = cur; |
| 472 | if (msnc_len > 2) |
| 473 | goto err_inval; |
| 474 | cur += msnc_len; |
| 475 | |
| 476 | /* aTTACH Type 10.5.5.2 */ |
| 477 | att_type = *cur++ & 0x0f; |
| 478 | |
| 479 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 480 | drx_par = *cur++ << 8; |
| 481 | drx_par |= *cur++; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 482 | |
| 483 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 484 | mi_len = *cur++; |
| 485 | mi = cur; |
| 486 | if (mi_len > 8) |
| 487 | goto err_inval; |
| 488 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 489 | cur += mi_len; |
| 490 | |
| 491 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 492 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 493 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 494 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 495 | |
| 496 | /* Old routing area identification 10.5.5.15 */ |
| 497 | old_ra_info = cur; |
| 498 | cur += 6; |
| 499 | |
| 500 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 501 | ms_ra_acc_cap_len = *cur++; |
| 502 | ms_ra_acc_cap = cur; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 503 | |
| 504 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 505 | |
| 506 | switch (mi_type) { |
| 507 | case GSM_MI_TYPE_IMSI: |
| 508 | /* Try to find MM context based on IMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 509 | if (!ctx) |
| 510 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 511 | if (!ctx) { |
| 512 | #if 0 |
| 513 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 514 | #else |
| 515 | /* As a temorary hack, we simply assume that the IMSI exists */ |
| 516 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
| 517 | if (!ctx) |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 518 | return gsm48_tx_gmm_att_rej_oldmsg(msg, GMM_CAUSE_NET_FAIL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 519 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
| 520 | #endif |
| 521 | } |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 522 | ctx->tlli = msgb_tlli(msg); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 523 | ctx->llme = llme; |
Harald Welte | 5c23bfc | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 524 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 525 | break; |
| 526 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 527 | memcpy(&tmsi, mi+1, 4); |
| 528 | tmsi = ntohl(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 529 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 530 | if (!ctx) |
| 531 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 532 | if (!ctx) { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 533 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 534 | ctx->p_tmsi = tmsi; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 535 | } |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 536 | ctx->tlli = msgb_tlli(msg); |
| 537 | ctx->llme = llme; |
| 538 | msgid2mmctx(ctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 539 | break; |
| 540 | default: |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 541 | LOGP(DMM, LOGL_NOTICE, "Rejecting ATTACH REQUEST with " |
| 542 | "MI type %u\n", mi_type); |
| 543 | 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] | 544 | } |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 545 | /* Update MM Context with currient RA and Cell ID */ |
| 546 | ctx->ra = ra_id; |
| 547 | ctx->cell_id = cid; |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 548 | /* Update MM Context with other data */ |
| 549 | ctx->drx_parms = drx_par; |
| 550 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
| 551 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, ms_ra_acc_cap_len); |
| 552 | ctx->ms_network_capa.len = msnc_len; |
| 553 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
| 554 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 555 | #ifdef PTMSI_ALLOC |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 556 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 557 | ctx->p_tmsi_old = ctx->p_tmsi; |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 558 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 559 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 560 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 561 | * foreign TLLI to local TLLI */ |
| 562 | ctx->tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 563 | |
| 564 | /* Inform LLC layer about new TLLI but keep old active */ |
| 565 | gprs_llgmm_assign(ctx->llme, ctx->tlli, ctx->tlli_new, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 566 | |
| 567 | DEBUGPC(DMM, "\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 568 | return ctx ? gsm48_gmm_authorize(ctx, GMM_T3350_MODE_ATT) : 0; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 569 | |
| 570 | err_inval: |
| 571 | DEBUGPC(DMM, "\n"); |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 572 | 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] | 573 | } |
| 574 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 575 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 576 | 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] | 577 | { |
| 578 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 579 | uint8_t detach_type, power_off; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 580 | |
| 581 | detach_type = gh->data[0] & 0x7; |
| 582 | power_off = gh->data[0] & 0x8; |
| 583 | |
| 584 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
| 585 | |
| 586 | DEBUGP(DMM, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", |
| 587 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 588 | power_off ? "Power-off" : ""); |
| 589 | |
| 590 | /* Mark MM state as deregistered */ |
| 591 | ctx->mm_state = GMM_DEREGISTERED; |
| 592 | |
| 593 | /* force_stby = 0 */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 594 | return gsm48_tx_gmm_det_ack(ctx, 0); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 595 | } |
| 596 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 597 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 598 | 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] | 599 | { |
| 600 | struct msgb *msg = gsm48_msgb_alloc(); |
| 601 | struct gsm48_hdr *gh; |
| 602 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 603 | uint8_t *mid; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 604 | |
| 605 | DEBUGP(DMM, "<- ROUTING AREA UPDATE ACCEPT\n"); |
| 606 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 607 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 608 | |
| 609 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 610 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 611 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 612 | |
| 613 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 614 | rua->force_stby = 0; /* not indicated */ |
| 615 | rua->upd_result = 0; /* RA updated */ |
| 616 | rua->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 617 | |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 618 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 619 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 620 | #if 0 |
| 621 | /* Optional: P-TMSI signature */ |
| 622 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 623 | ptsig = msgb_put(msg, 3); |
| 624 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 625 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 626 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 627 | #endif |
| 628 | |
| 629 | #ifdef PTMSI_ALLOC |
| 630 | /* Optional: Allocated P-TMSI */ |
| 631 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 632 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 633 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 634 | #endif |
| 635 | |
| 636 | /* Option: MS ID, ... */ |
Harald Welte | cca80c9 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 637 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 641 | 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] | 642 | { |
| 643 | struct msgb *msg = gsm48_msgb_alloc(); |
| 644 | struct gsm48_hdr *gh; |
| 645 | |
| 646 | DEBUGP(DMM, "<- ROUTING AREA UPDATE REJECT\n"); |
| 647 | |
Harald Welte | 2351f1f | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 648 | gmm_copy_id(msg, old_msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 649 | |
| 650 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 651 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 652 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 653 | gh->data[0] = cause; |
| 654 | gh->data[1] = 0; /* ? */ |
| 655 | |
| 656 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 657 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 658 | } |
| 659 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame^] | 660 | static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, |
| 661 | uint16_t pdp_status) |
| 662 | { |
| 663 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 664 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 665 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 666 | * shall deactivate all those PDP contexts locally (without peer to |
| 667 | * peer signalling between the MS and the network), which are not in SM |
| 668 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 669 | * being in state PDP-INACTIVE. */ |
| 670 | |
| 671 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
| 672 | if (!(pdp_status & (1 << pdp->nsapi))) { |
| 673 | LOGP(DMM, "Dropping PDP context for NSAPI=%u " |
| 674 | "due to PDP CTX STATUS IE= 0x%04x\n", |
| 675 | pdp->nsapi, pdp_status); |
| 676 | sgsn_delete_pdp_ctx(pdp); |
| 677 | } |
| 678 | } |
| 679 | } |
| 680 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 681 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 682 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 683 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 684 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 685 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 686 | uint8_t *cur = gh->data; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame^] | 687 | uint8_t *ms_ra_acc_cap; |
| 688 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 689 | struct gprs_ra_id old_ra_id; |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame^] | 690 | struct tlv_parsed tp; |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 691 | uint8_t upd_type; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 692 | int rc; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 693 | |
| 694 | /* Update Type 10.5.5.18 */ |
| 695 | upd_type = *cur++ & 0x0f; |
| 696 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 697 | DEBUGP(DMM, "-> GMM RA UPDATE REQUEST type=\"%s\" ", |
| 698 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 699 | |
| 700 | /* Old routing area identification 10.5.5.15 */ |
| 701 | gsm48_parse_ra(&old_ra_id, cur); |
| 702 | cur += 6; |
| 703 | |
| 704 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame^] | 705 | ms_ra_acc_cap_len = *cur++; |
| 706 | ms_ra_acc_cap = cur; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 707 | |
| 708 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 709 | * DRX parameter, MS network capability */ |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame^] | 710 | rc = tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
| 711 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 712 | |
| 713 | switch (upd_type) { |
| 714 | case GPRS_UPD_T_RA_LA: |
| 715 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
| 716 | DEBUGPC(DMM, " unsupported in Mode III, is your SI13 corrupt?\n"); |
| 717 | return gsm48_tx_gmm_ra_upd_rej(msg, GMM_CAUSE_PROTO_ERR_UNSPEC); |
| 718 | break; |
| 719 | case GPRS_UPD_T_RA: |
| 720 | case GPRS_UPD_T_PERIODIC: |
| 721 | break; |
| 722 | } |
| 723 | |
| 724 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 725 | if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) { |
| 726 | /* The MS has to perform GPRS attach */ |
| 727 | DEBUGPC(DMM, " REJECT\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 728 | /* Device is still IMSI atached for CS but initiate GPRS ATTACH */ |
| 729 | 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] | 730 | } |
| 731 | |
Harald Welte | de34afa | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 732 | /* Update the MM context with the new RA-ID */ |
| 733 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
| 734 | /* Update the MM context with the new TLLI */ |
| 735 | mmctx->tlli = msgb_tlli(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 736 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 737 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 738 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 739 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 740 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 741 | DEBUGPC(DMM, " ACCEPT\n"); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 742 | #ifdef PTMSI_ALLOC |
| 743 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 744 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 745 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 746 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
| 747 | mmctx_timer_start(mmctx, 3350, GSM0408_T3350_SECS); |
| 748 | #endif |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 749 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 750 | * foreign TLLI to local TLLI */ |
| 751 | mmctx->tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 752 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 753 | /* Inform LLC layer about new TLLI but keep old active */ |
| 754 | gprs_llgmm_assign(mmctx->llme, mmctx->tlli, mmctx->tlli_new, 0, NULL); |
| 755 | |
Harald Welte | d961072 | 2010-06-09 10:28:29 +0200 | [diff] [blame^] | 756 | /* Look at PDP Context Status IE and see if MS's view of |
| 757 | * activated/deactivated NSAPIs agrees with our view */ |
| 758 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
| 759 | uint16_t pdp_status = ntohs(*(uint16_t *) |
| 760 | TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)); |
| 761 | process_ms_ctx_status(mmctx, pdp_status); |
| 762 | } |
| 763 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 764 | /* Send RA UPDATE ACCEPT */ |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 765 | return gsm48_tx_gmm_ra_upd_ack(mmctx); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 766 | } |
| 767 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 768 | 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] | 769 | { |
| 770 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 771 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 772 | DEBUGP(DMM, "-> GPRS MM STATUS (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 773 | get_value_string(gmm_cause_names, gh->data[0])); |
| 774 | |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | /* GPRS Mobility Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 779 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 780 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 781 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 782 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 783 | int rc; |
| 784 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 785 | /* MMCTX can be NULL when called */ |
| 786 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 787 | if (!mmctx && |
| 788 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 789 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 790 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 791 | /* FIXME: Send GMM_CAUSE_IMPL_DETACHED */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 792 | return -EINVAL; |
| 793 | } |
| 794 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 795 | switch (gh->msg_type) { |
| 796 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 797 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 798 | break; |
| 799 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 800 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 801 | break; |
| 802 | case GSM48_MT_GMM_ID_RESP: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 803 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 804 | break; |
| 805 | case GSM48_MT_GMM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 806 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 807 | break; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 808 | case GSM48_MT_GMM_DETACH_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 809 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 810 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 811 | case GSM48_MT_GMM_ATTACH_COMPL: |
| 812 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 813 | DEBUGP(DMM, "-> ATTACH COMPLETE\n"); |
| 814 | mmctx_timer_stop(mmctx, 3350); |
| 815 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 816 | /* Unassign the old TLLI */ |
| 817 | mmctx->tlli = mmctx->tlli_new; |
| 818 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, 0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 819 | break; |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 820 | case GSM48_MT_GMM_RA_UPD_COMPL: |
| 821 | /* only in case SGSN offered new P-TMSI */ |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 822 | DEBUGP(DMM, "-> ROUTEING AREA UPDATE COMPLETE\n"); |
| 823 | mmctx_timer_stop(mmctx, 3350); |
| 824 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 825 | /* Unassign the old TLLI */ |
| 826 | mmctx->tlli = mmctx->tlli_new; |
| 827 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, 0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 828 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 829 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 830 | DEBUGP(DMM, "-> PTMSI REALLLICATION COMPLETE\n"); |
| 831 | mmctx_timer_stop(mmctx, 3350); |
| 832 | mmctx->p_tmsi_old = 0; |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 833 | /* Unassign the old TLLI */ |
| 834 | mmctx->tlli = mmctx->tlli_new; |
| 835 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, 0, NULL); |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 836 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 837 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
| 838 | DEBUGP(DMM, "Unimplemented GSM 04.08 GMM msg type 0x%02x\n", |
| 839 | gh->msg_type); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 840 | /* FIXME: Send GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 841 | break; |
| 842 | default: |
| 843 | DEBUGP(DMM, "Unknown GSM 04.08 GMM msg type 0x%02x\n", |
| 844 | gh->msg_type); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 845 | /* FIXME: Send GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 846 | break; |
| 847 | } |
| 848 | |
| 849 | return rc; |
| 850 | } |
| 851 | |
Harald Welte | 7e01d8e | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 852 | static void mmctx_timer_cb(void *_mm) |
| 853 | { |
| 854 | struct sgsn_mm_ctx *mm = _mm; |
| 855 | |
| 856 | mm->num_T_exp++; |
| 857 | |
| 858 | switch (mm->T) { |
| 859 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 860 | if (mm->num_T_exp >= 5) { |
| 861 | LOGP(DMM, LOGL_NOTICE, "T3350 expired >= 5 times\n"); |
| 862 | mm->mm_state = GMM_DEREGISTERED; |
| 863 | /* FIXME: should we return some error? */ |
| 864 | break; |
| 865 | } |
| 866 | /* re-transmit the respective msg and re-start timer */ |
| 867 | switch (mm->t3350_mode) { |
| 868 | case GMM_T3350_MODE_ATT: |
| 869 | gsm48_tx_gmm_att_ack(mm); |
| 870 | break; |
| 871 | case GMM_T3350_MODE_RAU: |
| 872 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 873 | break; |
| 874 | case GMM_T3350_MODE_PTMSI_REALL: |
| 875 | /* FIXME */ |
| 876 | break; |
| 877 | } |
| 878 | bsc_schedule_timer(&mm->timer, GSM0408_T3350_SECS, 0); |
| 879 | break; |
| 880 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 881 | if (mm->num_T_exp >= 5) { |
| 882 | LOGP(DMM, LOGL_NOTICE, "T3370 expired >= 5 times\n"); |
| 883 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
| 884 | mm->mm_state = GMM_DEREGISTERED; |
| 885 | break; |
| 886 | } |
| 887 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 888 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
| 889 | bsc_schedule_timer(&mm->timer, GSM0408_T3370_SECS, 0); |
| 890 | break; |
| 891 | default: |
| 892 | LOGP(DMM, LOGL_ERROR, "timer expired in unknown mode %u\n", |
| 893 | mm->T); |
| 894 | } |
| 895 | } |
| 896 | |
| 897 | /* GPRS SESSION MANAGEMENT */ |
| 898 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 899 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 900 | { |
| 901 | uint8_t v[6]; |
| 902 | |
| 903 | v[0] = PDP_TYPE_ORG_IETF; |
| 904 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 905 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 906 | |
| 907 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 908 | } |
| 909 | |
| 910 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 911 | { |
| 912 | uint8_t v[2]; |
| 913 | |
| 914 | v[0] = PDP_TYPE_ORG_ETSI; |
| 915 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 916 | |
| 917 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 918 | } |
| 919 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 920 | /* Section 9.5.2: Ativate PDP Context Accept */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 921 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 922 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 923 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 924 | struct gsm48_hdr *gh; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 925 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 926 | |
| 927 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT ACK\n"); |
| 928 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 929 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 930 | |
| 931 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 932 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 933 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 934 | |
| 935 | /* Negotiated LLC SAPI */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 936 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 937 | |
Harald Welte | 540dcbc | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 938 | /* FIXME: copy QoS parameters from original request */ |
| 939 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 940 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 941 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 942 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 943 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 944 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 945 | /* PDP address */ |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 946 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 947 | * the IE is identical with the 04.08 PDP Address IE */ |
| 948 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 949 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 950 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 951 | pdp->lib->eua.v[0] |= 0xf0; |
| 952 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 953 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
| 954 | if (pdp->lib->pco_req.l && pdp->lib->pco_req.v) |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 955 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | f2d6658 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 956 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 7d7fd2b | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 957 | |
Harald Welte | 2aea749 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 958 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 959 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 960 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 961 | } |
| 962 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 963 | /* Section 9.5.3: Activate PDP Context reject */ |
| 964 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 965 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 966 | { |
| 967 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 968 | struct gsm48_hdr *gh; |
| 969 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 970 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 971 | DEBUGP(DMM, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 972 | |
| 973 | mmctx2msgid(msg, mm); |
| 974 | |
| 975 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 976 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 977 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 978 | |
| 979 | msgb_v_put(msg, cause); |
| 980 | if (pco_len && pco_v) |
| 981 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 982 | |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 983 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 984 | } |
| 985 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 986 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 987 | 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] | 988 | { |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 989 | struct msgb *msg = gsm48_msgb_alloc(); |
| 990 | struct gsm48_hdr *gh; |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 991 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 992 | |
| 993 | DEBUGP(DMM, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
| 994 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 995 | mmctx2msgid(msg, mm); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 996 | |
| 997 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 998 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 999 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 1000 | |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1001 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1002 | } |
| 1003 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 1004 | { |
| 1005 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1006 | } |
| 1007 | |
| 1008 | /* Section 9.5.1: Activate PDP Context Request */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1009 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 1010 | struct msgb *msg) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1011 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1012 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1013 | 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] | 1014 | uint8_t req_qos_len, req_pdpa_len; |
| 1015 | uint8_t *req_qos, *req_pdpa; |
| 1016 | struct tlv_parsed tp; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1017 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1018 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1019 | |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1020 | memset(&tp, 0, sizeof(tp)); |
| 1021 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1022 | DEBUGP(DMM, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
| 1023 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1024 | |
| 1025 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 1026 | |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1027 | req_qos_len = act_req->data[0]; |
| 1028 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 1029 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 1030 | 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] | 1031 | |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1032 | switch (req_pdpa[0] & 0xf) { |
| 1033 | case 0x0: |
| 1034 | DEBUGPC(DMM, "ETSI "); |
| 1035 | break; |
| 1036 | case 0x1: |
| 1037 | DEBUGPC(DMM, "IETF "); |
| 1038 | break; |
| 1039 | case 0xf: |
| 1040 | DEBUGPC(DMM, "Empty "); |
| 1041 | break; |
| 1042 | } |
| 1043 | |
| 1044 | switch (req_pdpa[1]) { |
| 1045 | case 0x21: |
| 1046 | DEBUGPC(DMM, "IPv4 "); |
| 1047 | if (req_pdpa_len >= 6) { |
| 1048 | struct in_addr ia; |
| 1049 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 1050 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 1051 | } |
| 1052 | break; |
| 1053 | case 0x57: |
| 1054 | DEBUGPC(DMM, "IPv6 "); |
| 1055 | if (req_pdpa_len >= 18) { |
| 1056 | /* FIXME: print IPv6 address */ |
| 1057 | } |
| 1058 | break; |
| 1059 | default: |
| 1060 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 1061 | break; |
| 1062 | } |
| 1063 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1064 | DEBUGPC(DMM, "\n"); |
| 1065 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1066 | /* put the non-TLV elements in the TLV parser structure to |
| 1067 | * pass them on to the SGSN / GTP code */ |
| 1068 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 1069 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 1070 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 1071 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 1072 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1073 | /* FIXME: determine GGSN based on APN and subscription options */ |
Harald Welte | b1fd23a | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1074 | if (TLVP_PRESENT(&tp, GSM48_IE_GSM_APN)) {} |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1075 | |
| 1076 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 1077 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 1078 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 1079 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1080 | GSM_CAUSE_INV_MAND_INFO, |
| 1081 | 0, NULL); |
| 1082 | } |
| 1083 | |
| 1084 | /* Check if NSAPI is already in use */ |
| 1085 | if (sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi)) { |
| 1086 | /* FIXME: send reject with GSM_CAUSE_NSAPI_IN_USE */ |
| 1087 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1088 | GSM_CAUSE_NSAPI_IN_USE, |
| 1089 | 0, NULL); |
| 1090 | } |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1091 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1092 | #if 1 |
| 1093 | { |
Harald Welte | ebe8a6d | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1094 | struct sgsn_ggsn_ctx *ggsn = sgsn_ggsn_ctx_by_id(0); |
| 1095 | if (!ggsn) { |
| 1096 | LOGP(DGPRS, LOGL_ERROR, "No GGSN context 0 found!\n"); |
| 1097 | return -EIO; |
| 1098 | } |
| 1099 | ggsn->gsn = sgsn->gsn; |
| 1100 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, act_req->req_nsapi, &tp); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1101 | if (!pdp) |
| 1102 | return -1; |
| 1103 | pdp->sapi = act_req->req_llc_sapi; |
| 1104 | pdp->ti = transaction_id; |
| 1105 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1106 | } |
Harald Welte | 64df8ed | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1107 | return 0; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1108 | #else |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1109 | return gsm48_tx_gsm_act_pdp_acc(mmctx, transaction_id, act_req); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1110 | #endif |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1111 | } |
| 1112 | |
| 1113 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1114 | 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] | 1115 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1116 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1117 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1118 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1119 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1120 | DEBUGP(DMM, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1121 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1122 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1123 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1124 | if (!pdp) { |
| 1125 | LOGP(DMM, LOGL_NOTICE, "Deactivate PDP Context Request for " |
| 1126 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1127 | mm->imsi, transaction_id); |
Harald Welte | 3b80731 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1128 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1129 | } |
| 1130 | |
| 1131 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1132 | } |
| 1133 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1134 | 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] | 1135 | { |
| 1136 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1137 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1138 | DEBUGP(DMM, "-> GPRS SM STATUS (cause: %s)\n", |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1139 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1140 | |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | /* GPRS Session Management */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1145 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1146 | struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1147 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1148 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1149 | int rc; |
| 1150 | |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1151 | /* MMCTX can be NULL when called */ |
| 1152 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1153 | if (!mmctx) { |
| 1154 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Harald Welte | a890573 | 2010-05-30 20:28:22 +0200 | [diff] [blame] | 1155 | /* FIXME: return SM / MM STATUS */ |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1156 | return -EINVAL; |
| 1157 | } |
| 1158 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1159 | switch (gh->msg_type) { |
| 1160 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1161 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1162 | break; |
| 1163 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1164 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1165 | break; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1166 | case GSM48_MT_GSM_STATUS: |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1167 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1168 | break; |
| 1169 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 1170 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 1171 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
| 1172 | DEBUGP(DMM, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n", |
| 1173 | gh->msg_type); |
Harald Welte | a890573 | 2010-05-30 20:28:22 +0200 | [diff] [blame] | 1174 | /* FIXME: return SM / MM STATUS */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1175 | break; |
| 1176 | default: |
| 1177 | DEBUGP(DMM, "Unknown GSM 04.08 GSM msg type 0x%02x\n", |
| 1178 | gh->msg_type); |
Harald Welte | a890573 | 2010-05-30 20:28:22 +0200 | [diff] [blame] | 1179 | /* FIXME: return SM / MM STATUS */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1180 | break; |
| 1181 | |
| 1182 | } |
| 1183 | |
| 1184 | return rc; |
| 1185 | } |
| 1186 | |
| 1187 | /* Main entry point for incoming 04.08 GPRS messages */ |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1188 | int gsm0408_gprs_rcvmsg(struct msgb *msg, struct gprs_llc_llme *llme) |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1189 | { |
Harald Welte | cf3c414 | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1190 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | d85d9a9 | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1191 | uint8_t pdisc = gh->proto_discr & 0x0f; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1192 | struct sgsn_mm_ctx *mmctx; |
| 1193 | struct gprs_ra_id ra_id; |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1194 | int rc = -EINVAL; |
| 1195 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1196 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 1197 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1198 | if (mmctx) { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1199 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1200 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1201 | mmctx->llme = llme; |
Harald Welte | 8a035af | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1202 | } |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1203 | |
| 1204 | /* MMCTX can be NULL */ |
| 1205 | |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1206 | switch (pdisc) { |
| 1207 | case GSM48_PDISC_MM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1208 | rc = gsm0408_rcv_gmm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1209 | break; |
| 1210 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 75871c7 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1211 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1212 | break; |
| 1213 | default: |
| 1214 | DEBUGP(DMM, "Unknown GSM 04.08 discriminator 0x%02x\n", |
| 1215 | pdisc); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1216 | /* FIXME: return status message */ |
Harald Welte | 75bb820 | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1217 | break; |
| 1218 | } |
| 1219 | |
| 1220 | return rc; |
| 1221 | } |