Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 4 | /* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 27 | #include <stdint.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 28 | #include <errno.h> |
| 29 | |
| 30 | #include <netinet/in.h> |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 31 | #include <arpa/inet.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 32 | |
| 33 | #include <openbsc/db.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 34 | #include <osmocom/core/msgb.h> |
Harald Welte | d36ff76 | 2011-03-23 18:26:56 +0100 | [diff] [blame] | 35 | #include <osmocom/gsm/tlv.h> |
| 36 | #include <osmocom/gsm/gsm_utils.h> |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 37 | #include <osmocom/core/signal.h> |
| 38 | #include <osmocom/core/talloc.h> |
| 39 | #include <osmocom/core/rate_ctr.h> |
Harald Welte | d605709 | 2010-05-02 12:57:45 +0200 | [diff] [blame] | 40 | |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 41 | #include <osmocom/gprs/gprs_bssgp.h> |
| 42 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 43 | #include <openbsc/debug.h> |
| 44 | #include <openbsc/gsm_data.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 45 | #include <openbsc/gsm_subscriber.h> |
| 46 | #include <openbsc/gsm_04_08.h> |
| 47 | #include <openbsc/gsm_04_08_gprs.h> |
| 48 | #include <openbsc/paging.h> |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 49 | #include <openbsc/transaction.h> |
| 50 | #include <openbsc/gprs_llc.h> |
| 51 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 52 | #include <openbsc/gprs_gmm.h> |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 53 | #include <openbsc/sgsn.h> |
| 54 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 55 | #include <pdp.h> |
| 56 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 57 | #define PTMSI_ALLOC |
| 58 | |
Harald Welte | 649e1ff | 2013-07-21 17:41:46 +0800 | [diff] [blame] | 59 | /* Section 11.2.2 / Table 11.4 MM timers netwokr side */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 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 | |
Harald Welte | 649e1ff | 2013-07-21 17:41:46 +0800 | [diff] [blame] | 65 | /* Section 11.2.2 / Table 11.4a MM timers netwokr side */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 66 | #define GSM0408_T3313_SECS 30 /* waiting for paging response */ |
| 67 | #define GSM0408_T3314_SECS 44 /* force to STBY on expiry */ |
| 68 | #define GSM0408_T3316_SECS 44 |
| 69 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 70 | /* Section 11.3 / Table 11.2d Timers of Session Management - network side */ |
| 71 | #define GSM0408_T3385_SECS 8 /* wait for ACT PDP CTX REQ */ |
| 72 | #define GSM0408_T3386_SECS 8 /* wait for MODIFY PDP CTX ACK */ |
| 73 | #define GSM0408_T3395_SECS 8 /* wait for DEACT PDP CTX ACK */ |
| 74 | #define GSM0408_T3397_SECS 8 /* wait for DEACT AA PDP CTX ACK */ |
| 75 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 76 | extern struct sgsn_instance *sgsn; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 77 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 78 | /* Protocol related stuff, should go into libosmocore */ |
| 79 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 80 | /* 10.5.5.14 GPRS MM Cause / Table 10.5.147 */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 81 | const struct value_string gmm_cause_names[] = { |
Harald Welte | fd29a1f | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 82 | { GMM_CAUSE_IMSI_UNKNOWN, "IMSI unknown in HLR" }, |
| 83 | { GMM_CAUSE_ILLEGAL_MS, "Illegal MS" }, |
| 84 | { GMM_CAUSE_ILLEGAL_ME, "Illegal ME" }, |
| 85 | { GMM_CAUSE_GPRS_NOTALLOWED, "GPRS services not allowed" }, |
| 86 | { GMM_CAUSE_GPRS_OTHER_NOTALLOWED, |
| 87 | "GPRS services and non-GPRS services not allowed" }, |
| 88 | { GMM_CAUSE_MS_ID_NOT_DERIVED, |
| 89 | "MS identity cannot be derived by the network" }, |
| 90 | { GMM_CAUSE_IMPL_DETACHED, "Implicitly detached" }, |
| 91 | { GMM_CAUSE_PLMN_NOTALLOWED, "PLMN not allowed" }, |
| 92 | { GMM_CAUSE_LA_NOTALLOWED, "Location Area not allowed" }, |
| 93 | { GMM_CAUSE_ROAMING_NOTALLOWED, |
| 94 | "Roaming not allowed in this location area" }, |
| 95 | { GMM_CAUSE_NO_GPRS_PLMN, |
| 96 | "GPRS services not allowed in this PLMN" }, |
| 97 | { GMM_CAUSE_MSC_TEMP_NOTREACH, "MSC temporarily not reachable" }, |
| 98 | { GMM_CAUSE_NET_FAIL, "Network failure" }, |
| 99 | { GMM_CAUSE_CONGESTION, "Congestion" }, |
| 100 | { GMM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 101 | { GMM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 102 | { GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 103 | "Message type non-existant or not implemented" }, |
| 104 | { GMM_CAUSE_MSGT_INCOMP_P_STATE, |
| 105 | "Message type not compatible with protocol state" }, |
| 106 | { GMM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 107 | "Information element non-existent or not implemented" }, |
Harald Welte | fd29a1f | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 108 | { GMM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 109 | { GMM_CAUSE_MSG_INCOMP_P_STATE, |
| 110 | "Message not compatible with protocol state " }, |
Harald Welte | fd29a1f | 2010-07-01 12:26:59 +0200 | [diff] [blame] | 111 | { GMM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 112 | { 0, NULL } |
| 113 | }; |
| 114 | |
| 115 | /* 10.5.6.6 SM Cause / Table 10.5.157 */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 116 | const struct value_string gsm_cause_names[] = { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 117 | { GSM_CAUSE_INSUFF_RSRC, "Insufficient resources" }, |
| 118 | { GSM_CAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 119 | { GSM_CAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 120 | { GSM_CAUSE_AUTH_FAILED, "User Authentication failed" }, |
| 121 | { GSM_CAUSE_ACT_REJ_GGSN, "Activation rejected by GGSN" }, |
| 122 | { GSM_CAUSE_ACT_REJ_UNSPEC, "Activation rejected, unspecified" }, |
| 123 | { GSM_CAUSE_SERV_OPT_NOTSUPP, "Service option not supported" }, |
| 124 | { GSM_CAUSE_REQ_SERV_OPT_NOTSUB, |
| 125 | "Requested service option not subscribed" }, |
| 126 | { GSM_CAUSE_SERV_OPT_TEMP_OOO, |
| 127 | "Service option temporarily out of order" }, |
| 128 | { GSM_CAUSE_NSAPI_IN_USE, "NSAPI already used" }, |
| 129 | { GSM_CAUSE_DEACT_REGULAR, "Regular deactivation" }, |
| 130 | { GSM_CAUSE_QOS_NOT_ACCEPTED, "QoS not accepted" }, |
| 131 | { GSM_CAUSE_NET_FAIL, "Network Failure" }, |
| 132 | { GSM_CAUSE_REACT_RQD, "Reactivation required" }, |
| 133 | { GSM_CAUSE_FEATURE_NOTSUPP, "Feature not supported " }, |
| 134 | { GSM_CAUSE_INVALID_TRANS_ID, "Invalid transaction identifier" }, |
| 135 | { GSM_CAUSE_SEM_INCORR_MSG, "Semantically incorrect message" }, |
| 136 | { GSM_CAUSE_INV_MAND_INFO, "Invalid mandatory information" }, |
| 137 | { GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL, |
| 138 | "Message type non-existant or not implemented" }, |
| 139 | { GSM_CAUSE_MSGT_INCOMP_P_STATE, |
| 140 | "Message type not compatible with protocol state" }, |
| 141 | { GSM_CAUSE_IE_NOTEXIST_NOTIMPL, |
| 142 | "Information element non-existent or not implemented" }, |
| 143 | { GSM_CAUSE_COND_IE_ERR, "Conditional IE error" }, |
| 144 | { GSM_CAUSE_MSG_INCOMP_P_STATE, |
| 145 | "Message not compatible with protocol state " }, |
| 146 | { GSM_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
| 147 | { 0, NULL } |
| 148 | }; |
| 149 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 150 | /* 10.5.5.2 */ |
| 151 | const struct value_string gprs_att_t_strs[] = { |
| 152 | { GPRS_ATT_T_ATTACH, "GPRS attach" }, |
| 153 | { GPRS_ATT_T_ATT_WHILE_IMSI, "GPRS attach while IMSI attached" }, |
| 154 | { GPRS_ATT_T_COMBINED, "Combined GPRS/IMSI attach" }, |
| 155 | { 0, NULL } |
| 156 | }; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 157 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 158 | const struct value_string gprs_upd_t_strs[] = { |
| 159 | { GPRS_UPD_T_RA, "RA updating" }, |
| 160 | { GPRS_UPD_T_RA_LA, "combined RA/LA updating" }, |
| 161 | { GPRS_UPD_T_RA_LA_IMSI_ATT, "combined RA/LA updating + IMSI attach" }, |
| 162 | { GPRS_UPD_T_PERIODIC, "periodic updating" }, |
| 163 | { 0, NULL } |
| 164 | }; |
| 165 | |
| 166 | /* 10.5.5.5 */ |
| 167 | const struct value_string gprs_det_t_mo_strs[] = { |
| 168 | { GPRS_DET_T_MO_GPRS, "GPRS detach" }, |
| 169 | { GPRS_DET_T_MO_IMSI, "IMSI detach" }, |
| 170 | { GPRS_DET_T_MO_COMBINED, "Combined GPRS/IMSI detach" }, |
| 171 | { 0, NULL } |
| 172 | }; |
| 173 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 174 | const struct value_string gprs_det_t_mt_strs[] = { |
| 175 | { GPRS_DET_T_MT_REATT_REQ, "re-attach required" }, |
| 176 | { GPRS_DET_T_MT_REATT_NOTREQ, "re-attach not required" }, |
| 177 | { GPRS_DET_T_MT_IMSI, "IMSI detach (after VLR failure)" }, |
| 178 | { 0, NULL } |
| 179 | }; |
| 180 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 181 | static const struct tlv_definition gsm48_gmm_att_tlvdef = { |
| 182 | .def = { |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 183 | [GSM48_IE_GMM_CIPH_CKSN] = { TLV_TYPE_FIXED, 1 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 184 | [GSM48_IE_GMM_TIMER_READY] = { TLV_TYPE_TV, 1 }, |
| 185 | [GSM48_IE_GMM_ALLOC_PTMSI] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 186 | [GSM48_IE_GMM_PTMSI_SIG] = { TLV_TYPE_FIXED, 3 }, |
| 187 | [GSM48_IE_GMM_AUTH_RAND] = { TLV_TYPE_FIXED, 16 }, |
| 188 | [GSM48_IE_GMM_AUTH_SRES] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 189 | [GSM48_IE_GMM_IMEISV] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 190 | [GSM48_IE_GMM_DRX_PARAM] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 191 | [GSM48_IE_GMM_MS_NET_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 192 | [GSM48_IE_GMM_PDP_CTX_STATUS] = { TLV_TYPE_TLV, 0 }, |
| 193 | [GSM48_IE_GMM_PS_LCS_CAPA] = { TLV_TYPE_TLV, 0 }, |
| 194 | [GSM48_IE_GMM_GMM_MBMS_CTX_ST] = { TLV_TYPE_TLV, 0 }, |
| 195 | }, |
| 196 | }; |
| 197 | |
| 198 | static const struct tlv_definition gsm48_sm_att_tlvdef = { |
| 199 | .def = { |
| 200 | [GSM48_IE_GSM_APN] = { TLV_TYPE_TLV, 0 }, |
| 201 | [GSM48_IE_GSM_PROTO_CONF_OPT] = { TLV_TYPE_TLV, 0 }, |
| 202 | [GSM48_IE_GSM_PDP_ADDR] = { TLV_TYPE_TLV, 0 }, |
| 203 | [GSM48_IE_GSM_AA_TMR] = { TLV_TYPE_TV, 1 }, |
| 204 | [GSM48_IE_GSM_NAME_FULL] = { TLV_TYPE_TLV, 0 }, |
| 205 | [GSM48_IE_GSM_NAME_SHORT] = { TLV_TYPE_TLV, 0 }, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 206 | [GSM48_IE_GSM_TIMEZONE] = { TLV_TYPE_FIXED, 1 }, |
| 207 | [GSM48_IE_GSM_UTC_AND_TZ] = { TLV_TYPE_FIXED, 7 }, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 208 | [GSM48_IE_GSM_LSA_ID] = { TLV_TYPE_TLV, 0 }, |
| 209 | }, |
| 210 | }; |
| 211 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 212 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx); |
| 213 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 214 | /* Our implementation, should be kept in SGSN */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 215 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 216 | static void mmctx_timer_cb(void *_mm); |
| 217 | |
| 218 | static void mmctx_timer_start(struct sgsn_mm_ctx *mm, unsigned int T, |
| 219 | unsigned int seconds) |
| 220 | { |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 221 | if (osmo_timer_pending(&mm->timer)) |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 222 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 223 | "timer %u pending\n", T, mm->T); |
| 224 | mm->T = T; |
| 225 | mm->num_T_exp = 0; |
| 226 | |
| 227 | /* FIXME: we should do this only once ? */ |
| 228 | mm->timer.data = mm; |
| 229 | mm->timer.cb = &mmctx_timer_cb; |
| 230 | |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 231 | osmo_timer_schedule(&mm->timer, seconds, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | static void mmctx_timer_stop(struct sgsn_mm_ctx *mm, unsigned int T) |
| 235 | { |
| 236 | if (mm->T != T) |
| 237 | LOGP(DMM, LOGL_ERROR, "Stopping MM timer %u but " |
| 238 | "%u is running\n", T, mm->T); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 239 | osmo_timer_del(&mm->timer); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 240 | } |
| 241 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 242 | /* Send a message through the underlying layer */ |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 243 | static int gsm48_gmm_sendmsg(struct msgb *msg, int command, |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 244 | struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 245 | { |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 246 | if (mm) |
| 247 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_SIG_OUT]); |
| 248 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 249 | /* caller needs to provide TLLI, BVCI and NSEI */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 250 | return gprs_llc_tx_ui(msg, GPRS_SAPI_GMM, command, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 251 | } |
| 252 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 253 | /* copy identifiers from old message to new message, this |
| 254 | * is required so lower layers can route it correctly */ |
| 255 | static void gmm_copy_id(struct msgb *msg, const struct msgb *old) |
| 256 | { |
| 257 | msgb_tlli(msg) = msgb_tlli(old); |
| 258 | msgb_bvci(msg) = msgb_bvci(old); |
| 259 | msgb_nsei(msg) = msgb_nsei(old); |
| 260 | } |
| 261 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 262 | /* Store BVCI/NSEI in MM context */ |
| 263 | static void msgid2mmctx(struct sgsn_mm_ctx *mm, const struct msgb *msg) |
| 264 | { |
| 265 | mm->bvci = msgb_bvci(msg); |
| 266 | mm->nsei = msgb_nsei(msg); |
| 267 | } |
| 268 | |
| 269 | /* Store BVCI/NSEI in MM context */ |
| 270 | static void mmctx2msgid(struct msgb *msg, const struct sgsn_mm_ctx *mm) |
| 271 | { |
| 272 | msgb_tlli(msg) = mm->tlli; |
| 273 | msgb_bvci(msg) = mm->bvci; |
| 274 | msgb_nsei(msg) = mm->nsei; |
| 275 | } |
| 276 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 277 | static void delete_pdp_contexts(struct sgsn_mm_ctx *ctx, const char *log_text) |
| 278 | { |
| 279 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 280 | |
| 281 | /* delete all existing PDP contexts for this MS */ |
| 282 | llist_for_each_entry_safe(pdp, pdp2, &ctx->pdp_list, list) { |
| 283 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 284 | "Dropping PDP context for NSAPI=%u due to %s\n", |
| 285 | pdp->nsapi, log_text); |
| 286 | sgsn_pdp_ctx_terminate(pdp); |
| 287 | } |
| 288 | } |
| 289 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 290 | static void mm_ctx_cleanup_free(struct sgsn_mm_ctx *ctx, const char *log_text) |
| 291 | { |
| 292 | struct gprs_llc_llme *llme = ctx->llme; |
| 293 | uint32_t tlli = ctx->tlli; |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 294 | |
| 295 | /* Mark MM state as deregistered */ |
| 296 | ctx->mm_state = GMM_DEREGISTERED; |
| 297 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 298 | delete_pdp_contexts(ctx, log_text); |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 299 | |
| 300 | sgsn_mm_ctx_free(ctx); |
| 301 | ctx = NULL; |
| 302 | |
| 303 | /* TLLI unassignment, must be called after sgsn_mm_ctx_free */ |
| 304 | gprs_llgmm_assign(llme, tlli, 0xffffffff, GPRS_ALGO_GEA0, NULL); |
| 305 | } |
| 306 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 307 | /* Chapter 9.4.18 */ |
| 308 | static int _tx_status(struct msgb *msg, uint8_t cause, |
| 309 | struct sgsn_mm_ctx *mmctx, int sm) |
| 310 | { |
| 311 | struct gsm48_hdr *gh; |
| 312 | |
| 313 | /* MMCTX might be NULL! */ |
| 314 | |
| 315 | DEBUGP(DMM, "<- GPRS MM STATUS (cause: %s)\n", |
| 316 | get_value_string(gmm_cause_names, cause)); |
| 317 | |
| 318 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 319 | if (sm) { |
| 320 | gh->proto_discr = GSM48_PDISC_SM_GPRS; |
| 321 | gh->msg_type = GSM48_MT_GSM_STATUS; |
| 322 | } else { |
| 323 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 324 | gh->msg_type = GSM48_MT_GMM_STATUS; |
| 325 | } |
| 326 | gh->data[0] = cause; |
| 327 | |
| 328 | return gsm48_gmm_sendmsg(msg, 0, mmctx); |
| 329 | } |
Jacob Erlbeck | 7067142 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 330 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 331 | static int gsm48_tx_gmm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 332 | { |
| 333 | struct msgb *msg = gsm48_msgb_alloc(); |
| 334 | |
| 335 | mmctx2msgid(msg, mmctx); |
| 336 | return _tx_status(msg, cause, mmctx, 0); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 337 | } |
Jacob Erlbeck | 7067142 | 2014-10-29 22:57:30 +0100 | [diff] [blame] | 338 | |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 339 | static int gsm48_tx_sm_status(struct sgsn_mm_ctx *mmctx, uint8_t cause) |
| 340 | { |
| 341 | struct msgb *msg = gsm48_msgb_alloc(); |
| 342 | |
| 343 | mmctx2msgid(msg, mmctx); |
| 344 | return _tx_status(msg, cause, mmctx, 1); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 345 | } |
| 346 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 347 | static int _tx_detach_req(struct msgb *msg, uint8_t detach_type, uint8_t cause, |
| 348 | struct sgsn_mm_ctx *mmctx) |
| 349 | { |
| 350 | struct gsm48_hdr *gh; |
| 351 | |
| 352 | /* MMCTX might be NULL! */ |
| 353 | |
| 354 | DEBUGP(DMM, "<- GPRS MM DETACH REQ (type: %s, cause: %s)\n", |
| 355 | get_value_string(gprs_det_t_mt_strs, detach_type), |
| 356 | get_value_string(gmm_cause_names, cause)); |
| 357 | |
| 358 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 359 | |
| 360 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 361 | gh->msg_type = GSM48_MT_GMM_DETACH_REQ; |
| 362 | gh->data[0] = detach_type & 0x07; |
| 363 | |
| 364 | msgb_tv_put(msg, GSM48_IE_GMM_CAUSE, cause); |
| 365 | |
| 366 | return gsm48_gmm_sendmsg(msg, 0, mmctx); |
| 367 | } |
| 368 | |
| 369 | static int gsm48_tx_gmm_detach_req(struct sgsn_mm_ctx *mmctx, |
| 370 | uint8_t detach_type, uint8_t cause) |
| 371 | { |
| 372 | struct msgb *msg = gsm48_msgb_alloc(); |
| 373 | |
| 374 | mmctx2msgid(msg, mmctx); |
| 375 | return _tx_detach_req(msg, detach_type, cause, mmctx); |
| 376 | } |
| 377 | |
| 378 | static int gsm48_tx_gmm_detach_req_oldmsg(struct msgb *oldmsg, |
| 379 | uint8_t detach_type, uint8_t cause) |
| 380 | { |
| 381 | struct msgb *msg = gsm48_msgb_alloc(); |
| 382 | |
| 383 | gmm_copy_id(msg, oldmsg); |
| 384 | return _tx_detach_req(msg, detach_type, cause, NULL); |
| 385 | } |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 386 | |
Harald Welte | 86fda90 | 2010-05-03 10:54:35 +0200 | [diff] [blame] | 387 | static struct gsm48_qos default_qos = { |
| 388 | .delay_class = 4, /* best effort */ |
| 389 | .reliab_class = GSM48_QOS_RC_LLC_UN_RLC_ACK_DATA_PROT, |
| 390 | .peak_tput = GSM48_QOS_PEAK_TPUT_32000bps, |
| 391 | .preced_class = GSM48_QOS_PC_NORMAL, |
| 392 | .mean_tput = GSM48_QOS_MEAN_TPUT_BEST_EFFORT, |
| 393 | .traf_class = GSM48_QOS_TC_INTERACTIVE, |
| 394 | .deliv_order = GSM48_QOS_DO_UNORDERED, |
| 395 | .deliv_err_sdu = GSM48_QOS_ERRSDU_YES, |
| 396 | .max_sdu_size = GSM48_QOS_MAXSDU_1520, |
| 397 | .max_bitrate_up = GSM48_QOS_MBRATE_63k, |
| 398 | .max_bitrate_down = GSM48_QOS_MBRATE_63k, |
| 399 | .resid_ber = GSM48_QOS_RBER_5e_2, |
| 400 | .sdu_err_ratio = GSM48_QOS_SERR_1e_2, |
| 401 | .handling_prio = 3, |
| 402 | .xfer_delay = 0x10, /* 200ms */ |
| 403 | .guar_bitrate_up = GSM48_QOS_MBRATE_0k, |
| 404 | .guar_bitrate_down = GSM48_QOS_MBRATE_0k, |
| 405 | .sig_ind = 0, /* not optimised for signalling */ |
| 406 | .max_bitrate_down_ext = 0, /* use octet 9 */ |
| 407 | .guar_bitrate_down_ext = 0, /* use octet 13 */ |
| 408 | }; |
| 409 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 410 | /* Chapter 9.4.2: Attach accept */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 411 | static int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 412 | { |
| 413 | struct msgb *msg = gsm48_msgb_alloc(); |
| 414 | struct gsm48_hdr *gh; |
| 415 | struct gsm48_attach_ack *aa; |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 416 | uint8_t *mid; |
| 417 | #if 0 |
| 418 | uint8_t *ptsig; |
| 419 | #endif |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 420 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 421 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS ATTACH ACCEPT (new P-TMSI=0x%08x)\n", mm->p_tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 422 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 423 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 424 | |
| 425 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 426 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 427 | gh->msg_type = GSM48_MT_GMM_ATTACH_ACK; |
| 428 | |
| 429 | aa = (struct gsm48_attach_ack *) msgb_put(msg, sizeof(*aa)); |
| 430 | aa->force_stby = 0; /* not indicated */ |
| 431 | aa->att_result = 1; /* GPRS only */ |
| 432 | aa->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
| 433 | aa->radio_prio = 4; /* lowest */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 434 | gsm48_construct_ra(aa->ra_id.digits, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 435 | |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 436 | #if 0 |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 437 | /* Optional: P-TMSI signature */ |
| 438 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 439 | ptsig = msgb_put(msg, 3); |
| 440 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 441 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 442 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 443 | |
| 444 | /* Optional: Negotiated Ready timer value */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 445 | #endif |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 446 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 447 | #ifdef PTMSI_ALLOC |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 448 | /* Optional: Allocated P-TMSI */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 449 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 450 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 451 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 452 | #endif |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 453 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 454 | /* Optional: MS-identity (combined attach) */ |
| 455 | /* Optional: GMM cause (partial attach result for combined attach) */ |
| 456 | |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 457 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | /* Chapter 9.4.5: Attach reject */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 461 | static int _tx_gmm_att_rej(struct msgb *msg, uint8_t gmm_cause) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 462 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 463 | struct gsm48_hdr *gh; |
| 464 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 465 | LOGP(DMM, LOGL_NOTICE, "<- GPRS ATTACH REJECT: %s\n", get_value_string(gmm_cause_names, gmm_cause)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 466 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 467 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 468 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 469 | gh->msg_type = GSM48_MT_GMM_ATTACH_REJ; |
| 470 | gh->data[0] = gmm_cause; |
| 471 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 472 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 473 | } |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 474 | static int gsm48_tx_gmm_att_rej_oldmsg(const struct msgb *old_msg, |
| 475 | uint8_t gmm_cause) |
| 476 | { |
| 477 | struct msgb *msg = gsm48_msgb_alloc(); |
| 478 | gmm_copy_id(msg, old_msg); |
| 479 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 480 | } |
| 481 | static int gsm48_tx_gmm_att_rej(struct sgsn_mm_ctx *mm, |
| 482 | uint8_t gmm_cause) |
| 483 | { |
| 484 | struct msgb *msg = gsm48_msgb_alloc(); |
| 485 | mmctx2msgid(msg, mm); |
| 486 | return _tx_gmm_att_rej(msg, gmm_cause); |
| 487 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 488 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 489 | /* Chapter 9.4.6.2 Detach accept */ |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 490 | static int _tx_detach_ack(struct msgb *msg, uint8_t force_stby, |
| 491 | struct sgsn_mm_ctx *mm) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 492 | { |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 493 | struct gsm48_hdr *gh; |
| 494 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 495 | /* MMCTX might be NULL! */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 496 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 497 | DEBUGP(DMM, "<- GPRS MM DETACH ACC (force-standby: %d)\n", force_stby); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 498 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 499 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 500 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 501 | gh->msg_type = GSM48_MT_GMM_DETACH_ACK; |
| 502 | gh->data[0] = force_stby; |
| 503 | |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 504 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 505 | } |
| 506 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 507 | static int gsm48_tx_gmm_det_ack(struct sgsn_mm_ctx *mm, uint8_t force_stby) |
| 508 | { |
| 509 | struct msgb *msg = gsm48_msgb_alloc(); |
| 510 | |
| 511 | mmctx2msgid(msg, mm); |
| 512 | return _tx_detach_ack(msg, force_stby, mm); |
| 513 | } |
| 514 | |
| 515 | static int gsm48_tx_gmm_det_ack_oldmsg(struct msgb *oldmsg, uint8_t force_stby) |
| 516 | { |
| 517 | struct msgb *msg = gsm48_msgb_alloc(); |
| 518 | |
| 519 | gmm_copy_id(msg, oldmsg); |
| 520 | return _tx_detach_ack(msg, force_stby, NULL); |
| 521 | } |
| 522 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 523 | /* Transmit Chapter 9.4.12 Identity Request */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 524 | static int gsm48_tx_gmm_id_req(struct sgsn_mm_ctx *mm, uint8_t id_type) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 525 | { |
| 526 | struct msgb *msg = gsm48_msgb_alloc(); |
| 527 | struct gsm48_hdr *gh; |
| 528 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 529 | LOGMMCTXP(LOGL_DEBUG, mm, "<- GPRS IDENTITY REQUEST: mi_type=%02x\n", id_type); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 530 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 531 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 532 | |
| 533 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 534 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 535 | gh->msg_type = GSM48_MT_GMM_ID_REQ; |
| 536 | /* 10.5.5.9 ID type 2 + identity type and 10.5.5.7 'force to standby' IE */ |
| 537 | gh->data[0] = id_type & 0xf; |
| 538 | |
Harald Welte | dce1255 | 2010-05-31 22:31:04 +0200 | [diff] [blame] | 539 | return gsm48_gmm_sendmsg(msg, 1, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 540 | } |
| 541 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 542 | /* Section 9.4.9: Authentication and Ciphering Request */ |
| 543 | static int gsm48_tx_gmm_auth_ciph_req(struct sgsn_mm_ctx *mm, uint8_t *rand, |
| 544 | uint8_t key_seq, uint8_t algo) |
| 545 | { |
| 546 | struct msgb *msg = gsm48_msgb_alloc(); |
| 547 | struct gsm48_hdr *gh; |
| 548 | struct gsm48_auth_ciph_req *acreq; |
| 549 | uint8_t *m_rand, *m_cksn; |
| 550 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 551 | LOGMMCTXP(LOGL_INFO, mm, "<- GPRS AUTH AND CIPHERING REQ (rand = %s)\n", |
Pablo Neira Ayuso | c0d17f2 | 2011-05-07 12:12:48 +0200 | [diff] [blame] | 552 | osmo_hexdump(rand, 16)); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 553 | |
| 554 | mmctx2msgid(msg, mm); |
| 555 | |
| 556 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 557 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 558 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REQ; |
| 559 | |
| 560 | acreq = (struct gsm48_auth_ciph_req *) msgb_put(msg, sizeof(*acreq)); |
| 561 | acreq->ciph_alg = algo & 0xf; |
| 562 | acreq->imeisv_req = 0x1; |
| 563 | acreq->force_stby = 0x0; |
| 564 | acreq->ac_ref_nr = 0x0; /* FIXME: increment this? */ |
| 565 | |
| 566 | /* Only if authentication is requested we need to set RAND + CKSN */ |
| 567 | if (rand) { |
| 568 | m_rand = msgb_put(msg, 16+1); |
| 569 | m_rand[0] = GSM48_IE_GMM_AUTH_RAND; |
| 570 | memcpy(m_rand+1, rand, 16); |
| 571 | |
Jacob Erlbeck | 65d8273 | 2014-12-01 10:36:17 +0100 | [diff] [blame] | 572 | m_cksn = msgb_put(msg, 1); |
| 573 | m_cksn[0] = (GSM48_IE_GMM_CIPH_CKSN << 4) | (key_seq & 0x07); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 574 | } |
| 575 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 576 | /* FIXME: make sure we don't send any other messages to the MS */ |
| 577 | |
| 578 | return gsm48_gmm_sendmsg(msg, 1, mm); |
| 579 | } |
| 580 | |
| 581 | /* Section 9.4.11: Authentication and Ciphering Reject */ |
| 582 | static int gsm48_tx_gmm_auth_ciph_rej(struct sgsn_mm_ctx *mm) |
| 583 | { |
| 584 | struct msgb *msg = gsm48_msgb_alloc(); |
| 585 | struct gsm48_hdr *gh; |
| 586 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 587 | LOGMMCTXP(LOGL_NOTICE, mm, "<- GPRS AUTH AND CIPH REJECT\n"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 588 | |
| 589 | mmctx2msgid(msg, mm); |
| 590 | |
| 591 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 592 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 593 | gh->msg_type = GSM48_MT_GMM_AUTH_CIPH_REJ; |
| 594 | |
| 595 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 596 | } |
| 597 | |
| 598 | /* Section 9.4.10: Authentication and Ciphering Response */ |
| 599 | static int gsm48_rx_gmm_auth_ciph_resp(struct sgsn_mm_ctx *ctx, |
| 600 | struct msgb *msg) |
| 601 | { |
| 602 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 603 | struct gsm48_auth_ciph_resp *acr = (struct gsm48_auth_ciph_resp *)gh->data; |
| 604 | struct tlv_parsed tp; |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 605 | struct gsm_auth_tuple *at; |
| 606 | int rc; |
| 607 | |
| 608 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS AUTH AND CIPH RESPONSE\n"); |
| 609 | |
| 610 | if (ctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 611 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 612 | "Unexpected Auth & Ciph Response (ignored)\n"); |
| 613 | return 0; |
| 614 | } |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 615 | |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 616 | /* Stop T3360 */ |
| 617 | mmctx_timer_stop(ctx, 3360); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 618 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 619 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, acr->data, |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 620 | (msg->data + msg->len) - acr->data, 0, 0); |
| 621 | |
| 622 | /* FIXME: compare ac_ref? */ |
| 623 | |
| 624 | if (!TLVP_PRESENT(&tp, GSM48_IE_GMM_AUTH_SRES) || |
| 625 | !TLVP_PRESENT(&tp, GSM48_IE_GMM_IMEISV)) { |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 626 | /* TODO: missing mandatory IE, return STATUS or REJ? */ |
| 627 | LOGMMCTXP(LOGL_ERROR, ctx, "Missing mandantory IE\n"); |
| 628 | return -EINVAL; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 629 | } |
| 630 | |
Jacob Erlbeck | 8ff3fb0 | 2014-12-01 12:44:24 +0100 | [diff] [blame] | 631 | /* Compare SRES with what we expected */ |
| 632 | LOGMMCTXP(LOGL_DEBUG, ctx, "checking received auth info, SRES = %s\n", |
| 633 | osmo_hexdump(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), |
| 634 | TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES))); |
| 635 | |
| 636 | at = &ctx->auth_triplet; |
| 637 | |
| 638 | if (TLVP_LEN(&tp, GSM48_IE_GMM_AUTH_SRES) != sizeof(at->sres) || |
| 639 | memcmp(TLVP_VAL(&tp, GSM48_IE_GMM_AUTH_SRES), at->sres, |
| 640 | sizeof(at->sres)) != 0) { |
| 641 | |
| 642 | LOGMMCTXP(LOGL_NOTICE, ctx, "Received SRES doesn't match\n"); |
| 643 | rc = gsm48_tx_gmm_auth_ciph_rej(ctx); |
| 644 | mm_ctx_cleanup_free(ctx, "GPRS AUTH AND CIPH REJECT"); |
| 645 | return rc; |
| 646 | } |
| 647 | |
| 648 | ctx->is_authenticated = 1; |
| 649 | |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 650 | /* FIXME: enable LLC cipheirng */ |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 651 | |
| 652 | /* Check if we can let the mobile station enter */ |
| 653 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 654 | } |
| 655 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 656 | /* Check if we can already authorize a subscriber */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 657 | static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 658 | { |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 659 | /* Request IMSI and IMEI from the MS if they are unknown */ |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 660 | if (!strlen(ctx->imei)) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 661 | ctx->t3370_id_type = GSM_MI_TYPE_IMEI; |
| 662 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 663 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMEI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 664 | } |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 665 | if (!strlen(ctx->imsi)) { |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 666 | ctx->t3370_id_type = GSM_MI_TYPE_IMSI; |
| 667 | mmctx_timer_start(ctx, 3370, GSM0408_T3370_SECS); |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 668 | return gsm48_tx_gmm_id_req(ctx, GSM_MI_TYPE_IMSI); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 669 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 670 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 671 | /* All information required for authentication is available */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 672 | ctx->t3370_id_type = GSM_MI_TYPE_NONE; |
| 673 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 674 | if (ctx->auth_state == SGSN_AUTH_UNKNOWN) { |
| 675 | /* Request authorization, this leads to a call to |
Jacob Erlbeck | f951a01 | 2014-11-07 14:17:44 +0100 | [diff] [blame] | 676 | * sgsn_auth_update which in turn calls |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 677 | * gsm0408_gprs_access_granted or gsm0408_gprs_access_denied */ |
| 678 | |
Jacob Erlbeck | a0b6efb | 2014-11-13 10:48:39 +0100 | [diff] [blame] | 679 | sgsn_auth_request(ctx); |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 680 | /* Note that gsm48_gmm_authorize can be called recursively via |
| 681 | * sgsn_auth_request iff ctx->auth_info changes to AUTH_ACCEPTED |
| 682 | */ |
| 683 | return 0; |
| 684 | } |
| 685 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 686 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && !ctx->is_authenticated) { |
| 687 | struct gsm_auth_tuple *at = &ctx->auth_triplet; |
| 688 | |
| 689 | mmctx_timer_start(ctx, 3360, GSM0408_T3360_SECS); |
| 690 | return gsm48_tx_gmm_auth_ciph_req(ctx, at->rand, at->key_seq, |
| 691 | GPRS_ALGO_GEA0); |
| 692 | } |
| 693 | |
| 694 | if (ctx->auth_state == SGSN_AUTH_AUTHENTICATE && ctx->is_authenticated && |
| 695 | ctx->auth_triplet.key_seq != GSM_KEY_SEQ_INVAL) { |
| 696 | /* Check again for authorization */ |
| 697 | sgsn_auth_request(ctx); |
| 698 | return 0; |
| 699 | } |
| 700 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 701 | if (ctx->auth_state != SGSN_AUTH_ACCEPTED) { |
| 702 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 703 | "authorization is denied, aborting procedure\n"); |
| 704 | return -EACCES; |
Jacob Erlbeck | 0c06f98 | 2014-10-29 22:12:20 +0100 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | /* The MS is authorized */ |
| 708 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 709 | switch (ctx->pending_req) { |
| 710 | case 0: |
| 711 | LOGMMCTXP(LOGL_INFO, ctx, |
| 712 | "no pending request, authorization completed\n"); |
| 713 | break; |
| 714 | case GSM48_MT_GMM_ATTACH_REQ: |
| 715 | #ifdef PTMSI_ALLOC |
| 716 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 717 | mmctx_timer_start(ctx, 3350, GSM0408_T3350_SECS); |
| 718 | ctx->t3350_mode = GMM_T3350_MODE_ATT; |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 719 | #else |
| 720 | ctx->mm_state = GMM_REGISTERED_NORMAL; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 721 | #endif |
| 722 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 723 | return gsm48_tx_gmm_att_ack(ctx); |
| 724 | default: |
| 725 | LOGMMCTXP(LOGL_ERROR, ctx, |
| 726 | "only Attach Request is supported yet, " |
| 727 | "got request type %u\n", ctx->pending_req); |
| 728 | break; |
| 729 | } |
| 730 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 731 | return 0; |
| 732 | } |
| 733 | |
Jacob Erlbeck | 4adb136 | 2014-12-02 09:47:26 +0100 | [diff] [blame] | 734 | void gsm0408_gprs_authenticate(struct sgsn_mm_ctx *ctx) |
| 735 | { |
| 736 | ctx->is_authenticated = 0; |
| 737 | |
| 738 | gsm48_gmm_authorize(ctx); |
| 739 | } |
| 740 | |
Jacob Erlbeck | 423f8bf | 2014-10-24 18:09:54 +0200 | [diff] [blame] | 741 | void gsm0408_gprs_access_granted(struct sgsn_mm_ctx *ctx) |
| 742 | { |
| 743 | switch (ctx->mm_state) { |
| 744 | case GMM_COMMON_PROC_INIT: |
| 745 | LOGP(DMM, LOGL_NOTICE, |
| 746 | "Authorized, continuing procedure, IMSI=%s\n", |
| 747 | ctx->imsi); |
| 748 | /* Continue with the authorization */ |
| 749 | gsm48_gmm_authorize(ctx); |
| 750 | break; |
| 751 | default: |
| 752 | LOGP(DMM, LOGL_INFO, |
| 753 | "Authorized, ignored, IMSI=%s\n", |
| 754 | ctx->imsi); |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | void gsm0408_gprs_access_denied(struct sgsn_mm_ctx *ctx) |
| 759 | { |
| 760 | switch (ctx->mm_state) { |
| 761 | case GMM_COMMON_PROC_INIT: |
| 762 | LOGP(DMM, LOGL_NOTICE, |
| 763 | "Not authorized, rejecting ATTACH REQUEST, IMSI=%s\n", |
| 764 | ctx->imsi); |
| 765 | gsm48_tx_gmm_att_rej(ctx, GMM_CAUSE_GPRS_NOTALLOWED); |
| 766 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJECT"); |
| 767 | break; |
| 768 | case GMM_REGISTERED_NORMAL: |
| 769 | case GMM_REGISTERED_SUSPENDED: |
| 770 | LOGP(DMM, LOGL_NOTICE, |
| 771 | "Authorization lost, detaching, IMSI=%s\n", |
| 772 | ctx->imsi); |
| 773 | gsm48_tx_gmm_detach_req( |
| 774 | ctx, GPRS_DET_T_MT_REATT_NOTREQ, GMM_CAUSE_GPRS_NOTALLOWED); |
| 775 | |
| 776 | mm_ctx_cleanup_free(ctx, "auth lost"); |
| 777 | break; |
| 778 | default: |
| 779 | LOGP(DMM, LOGL_INFO, |
| 780 | "Authorization lost, ignored, IMSI=%s\n", |
| 781 | ctx->imsi); |
| 782 | } |
| 783 | } |
| 784 | |
Jacob Erlbeck | 98647ca | 2014-11-11 14:47:38 +0100 | [diff] [blame] | 785 | void gsm0408_gprs_access_cancelled(struct sgsn_mm_ctx *ctx) |
| 786 | { |
| 787 | switch (ctx->mm_state) { |
| 788 | #if 0 |
| 789 | case GMM_COMMON_PROC_INIT: |
| 790 | LOGP(DMM, LOGL_NOTICE, |
| 791 | "Cancelled, rejecting ATTACH REQUEST, IMSI=%s\n", |
| 792 | ctx->imsi); |
| 793 | gsm48_tx_gmm_att_rej(ctx, GMM_CAUSE_IMPL_DETACHED); |
| 794 | break; |
| 795 | case GMM_REGISTERED_NORMAL: |
| 796 | case GMM_REGISTERED_SUSPENDED: |
| 797 | LOGP(DMM, LOGL_NOTICE, |
| 798 | "Cancelled, detaching, IMSI=%s\n", |
| 799 | ctx->imsi); |
| 800 | gsm48_tx_gmm_detach_req( |
| 801 | ctx, GPRS_DET_T_MT_REATT_NOTREQ, GMM_CAUSE_IMPL_DETACHED); |
| 802 | break; |
| 803 | #endif |
| 804 | default: |
| 805 | LOGP(DMM, LOGL_INFO, |
| 806 | "Cancelled, deleting context, IMSI=%s\n", |
| 807 | ctx->imsi); |
| 808 | } |
| 809 | mm_ctx_cleanup_free(ctx, "access cancelled"); |
| 810 | } |
| 811 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 812 | /* Parse Chapter 9.4.13 Identity Response */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 813 | static int gsm48_rx_gmm_id_resp(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 814 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 815 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 816 | uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 817 | char mi_string[GSM48_MI_SIZE]; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 818 | |
| 819 | gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 820 | if (!ctx) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 821 | DEBUGP(DMM, "from unknown TLLI 0x%08x?!? This should not happen\n", msgb_tlli(msg)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 822 | return -EINVAL; |
| 823 | } |
| 824 | |
Daniel Willmann | f8070f4 | 2014-09-23 18:48:44 +0200 | [diff] [blame] | 825 | LOGMMCTXP(LOGL_DEBUG, ctx, "-> GMM IDENTITY RESPONSE: mi_type=0x%02x MI(%s)\n", |
| 826 | mi_type, mi_string); |
| 827 | |
Jacob Erlbeck | fb26c60 | 2014-10-22 12:20:26 +0200 | [diff] [blame] | 828 | if (ctx->t3370_id_type == GSM_MI_TYPE_NONE) { |
| 829 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 830 | "Got unexpected IDENTITY RESPONSE: mi_type=0x%02x MI(%s), " |
| 831 | "ignoring message\n", |
| 832 | mi_type, mi_string); |
| 833 | return -EINVAL; |
| 834 | } |
| 835 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 836 | if (mi_type == ctx->t3370_id_type) |
| 837 | mmctx_timer_stop(ctx, 3370); |
| 838 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 839 | switch (mi_type) { |
| 840 | case GSM_MI_TYPE_IMSI: |
| 841 | /* we already have a mm context with current TLLI, but no |
| 842 | * P-TMSI / IMSI yet. What we now need to do is to fill |
| 843 | * this initial context with data from the HLR */ |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 844 | if (strlen(ctx->imsi) == 0) { |
| 845 | /* Check if we already have a MM context for this IMSI */ |
| 846 | struct sgsn_mm_ctx *ictx; |
| 847 | ictx = sgsn_mm_ctx_by_imsi(mi_string); |
| 848 | if (ictx) { |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 849 | /* Handle it like in gsm48_rx_gmm_det_req, |
| 850 | * except that no messages are sent to the BSS */ |
| 851 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 852 | LOGMMCTXP(LOGL_NOTICE, ctx, "Deleting old MM Context for same IMSI " |
| 853 | "p_tmsi_old=0x%08x\n", |
| 854 | ictx->p_tmsi); |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 855 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 856 | mm_ctx_cleanup_free(ictx, "GPRS IMSI re-use"); |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 857 | } |
| 858 | } |
Jacob Erlbeck | fd636ae | 2014-07-08 09:49:07 +0200 | [diff] [blame] | 859 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 860 | break; |
| 861 | case GSM_MI_TYPE_IMEI: |
| 862 | strncpy(ctx->imei, mi_string, sizeof(ctx->imei)); |
| 863 | break; |
| 864 | case GSM_MI_TYPE_IMEISV: |
| 865 | break; |
| 866 | } |
| 867 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 868 | /* Check if we can let the mobile station enter */ |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 869 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | /* Section 9.4.1 Attach request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 873 | static int gsm48_rx_gmm_att_req(struct sgsn_mm_ctx *ctx, struct msgb *msg, |
| 874 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 875 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 876 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 877 | uint8_t *cur = gh->data, *msnc, *mi, *ms_ra_acc_cap; |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 878 | uint8_t msnc_len, att_type, mi_len, mi_type, ms_ra_acc_cap_len; |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 879 | uint16_t drx_par; |
| 880 | uint32_t tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 881 | char mi_string[GSM48_MI_SIZE]; |
| 882 | struct gprs_ra_id ra_id; |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 883 | uint16_t cid; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 884 | enum gsm48_gmm_cause reject_cause; |
| 885 | int rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 886 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 887 | LOGP(DMM, LOGL_INFO, "-> GMM ATTACH REQUEST "); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 888 | |
| 889 | /* As per TS 04.08 Chapter 4.7.1.4, the attach request arrives either |
| 890 | * with a foreign TLLI (P-TMSI that was allocated to the MS before), |
| 891 | * or with random TLLI. */ |
| 892 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 893 | cid = bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 894 | |
| 895 | /* MS network capability 10.5.5.12 */ |
| 896 | msnc_len = *cur++; |
| 897 | msnc = cur; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 898 | if (msnc_len > sizeof(ctx->ms_network_capa.buf)) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 899 | goto err_inval; |
| 900 | cur += msnc_len; |
| 901 | |
| 902 | /* aTTACH Type 10.5.5.2 */ |
| 903 | att_type = *cur++ & 0x0f; |
| 904 | |
| 905 | /* DRX parameter 10.5.5.6 */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 906 | drx_par = *cur++ << 8; |
| 907 | drx_par |= *cur++; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 908 | |
| 909 | /* Mobile Identity (P-TMSI or IMSI) 10.5.1.4 */ |
| 910 | mi_len = *cur++; |
| 911 | mi = cur; |
| 912 | if (mi_len > 8) |
| 913 | goto err_inval; |
| 914 | mi_type = *mi & GSM_MI_TYPE_MASK; |
| 915 | cur += mi_len; |
| 916 | |
| 917 | gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| 918 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 919 | DEBUGPC(DMM, "MI(%s) type=\"%s\" ", mi_string, |
| 920 | get_value_string(gprs_att_t_strs, att_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 921 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 922 | /* Old routing area identification 10.5.5.15. Skip it */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 923 | cur += 6; |
| 924 | |
| 925 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 926 | ms_ra_acc_cap_len = *cur++; |
| 927 | ms_ra_acc_cap = cur; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 928 | if (ms_ra_acc_cap_len > sizeof(ctx->ms_radio_access_capa.buf)) |
Harald Welte | c48ac47 | 2010-07-03 21:20:06 +0200 | [diff] [blame] | 929 | goto err_inval; |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 930 | cur += ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 931 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 932 | LOGPC(DMM, LOGL_INFO, "\n"); |
| 933 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 934 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status */ |
| 935 | |
| 936 | switch (mi_type) { |
| 937 | case GSM_MI_TYPE_IMSI: |
| 938 | /* Try to find MM context based on IMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 939 | if (!ctx) |
| 940 | ctx = sgsn_mm_ctx_by_imsi(mi_string); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 941 | if (!ctx) { |
| 942 | #if 0 |
| 943 | return gsm48_tx_gmm_att_rej(msg, GMM_CAUSE_IMSI_UNKNOWN); |
| 944 | #else |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 945 | ctx = sgsn_mm_ctx_alloc(0, &ra_id); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 946 | if (!ctx) { |
| 947 | reject_cause = GMM_CAUSE_NET_FAIL; |
| 948 | goto rejected; |
| 949 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 950 | strncpy(ctx->imsi, mi_string, sizeof(ctx->imsi)); |
| 951 | #endif |
| 952 | } |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 953 | ctx->tlli = msgb_tlli(msg); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 954 | ctx->llme = llme; |
Harald Welte | 68b99a4 | 2010-05-18 12:05:42 +0200 | [diff] [blame] | 955 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 956 | break; |
| 957 | case GSM_MI_TYPE_TMSI: |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 958 | memcpy(&tmsi, mi+1, 4); |
| 959 | tmsi = ntohl(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 960 | /* Try to find MM context based on P-TMSI */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 961 | if (!ctx) |
| 962 | ctx = sgsn_mm_ctx_by_ptmsi(tmsi); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 963 | if (!ctx) { |
Harald Welte | c728eea | 2010-12-24 23:07:18 +0100 | [diff] [blame] | 964 | /* Allocate a context as most of our code expects one. |
| 965 | * Context will not have an IMSI ultil ID RESP is received */ |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 966 | ctx = sgsn_mm_ctx_alloc(msgb_tlli(msg), &ra_id); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 967 | ctx->p_tmsi = tmsi; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 968 | } |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 969 | ctx->tlli = msgb_tlli(msg); |
| 970 | ctx->llme = llme; |
| 971 | msgid2mmctx(ctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 972 | break; |
| 973 | default: |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 974 | LOGP(DMM, LOGL_NOTICE, "Rejecting ATTACH REQUEST with " |
| 975 | "MI type %u\n", mi_type); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 976 | reject_cause = GMM_CAUSE_MS_ID_NOT_DERIVED; |
| 977 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 978 | } |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 979 | /* Update MM Context with currient RA and Cell ID */ |
| 980 | ctx->ra = ra_id; |
| 981 | ctx->cell_id = cid; |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 982 | /* Update MM Context with other data */ |
| 983 | ctx->drx_parms = drx_par; |
Alexander Chemeris | 84402c0 | 2013-07-03 10:12:23 +0400 | [diff] [blame] | 984 | ctx->ms_radio_access_capa.len = ms_ra_acc_cap_len; |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 985 | memcpy(ctx->ms_radio_access_capa.buf, ms_ra_acc_cap, |
| 986 | ctx->ms_radio_access_capa.len); |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 987 | ctx->ms_network_capa.len = msnc_len; |
| 988 | memcpy(ctx->ms_network_capa.buf, msnc, msnc_len); |
| 989 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 990 | #ifdef PTMSI_ALLOC |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 991 | /* Allocate a new P-TMSI (+ P-TMSI signature) and update TLLI */ |
Jacob Erlbeck | f6e7d99 | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 992 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 993 | if (ctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 994 | ctx->p_tmsi_old = ctx->p_tmsi; |
| 995 | ctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 996 | } |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 997 | ctx->mm_state = GMM_COMMON_PROC_INIT; |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 998 | #endif |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 999 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 1000 | * foreign TLLI to local TLLI */ |
| 1001 | ctx->tlli_new = gprs_tmsi2tlli(ctx->p_tmsi, TLLI_LOCAL); |
| 1002 | |
| 1003 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1004 | gprs_llgmm_assign(ctx->llme, ctx->tlli, ctx->tlli_new, |
| 1005 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1006 | |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1007 | ctx->pending_req = GSM48_MT_GMM_ATTACH_REQ; |
| 1008 | return gsm48_gmm_authorize(ctx); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1009 | |
| 1010 | err_inval: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1011 | LOGPC(DMM, LOGL_INFO, "\n"); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1012 | reject_cause = GMM_CAUSE_SEM_INCORR_MSG; |
| 1013 | |
| 1014 | rejected: |
| 1015 | /* Send ATTACH REJECT */ |
| 1016 | LOGMMCTXP(LOGL_NOTICE, ctx, |
| 1017 | "Rejecting Attach Request with cause '%s' (%d)\n", |
| 1018 | get_value_string(gmm_cause_names, reject_cause), reject_cause); |
| 1019 | rc = gsm48_tx_gmm_att_rej_oldmsg(msg, reject_cause); |
| 1020 | if (ctx) |
| 1021 | mm_ctx_cleanup_free(ctx, "GPRS ATTACH REJ"); |
| 1022 | else |
| 1023 | /* TLLI unassignment */ |
| 1024 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, GPRS_ALGO_GEA0, NULL); |
| 1025 | |
| 1026 | return rc; |
| 1027 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1028 | } |
| 1029 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1030 | /* Section 4.7.4.1 / 9.4.5.2 MO Detach request */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1031 | static int gsm48_rx_gmm_det_req(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1032 | { |
| 1033 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1034 | uint8_t detach_type, power_off; |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1035 | int rc = 0; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1036 | |
| 1037 | detach_type = gh->data[0] & 0x7; |
| 1038 | power_off = gh->data[0] & 0x8; |
| 1039 | |
| 1040 | /* FIXME: In 24.008 there is an optional P-TMSI and P-TMSI signature IE */ |
| 1041 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1042 | LOGMMCTXP(LOGL_INFO, ctx, "-> GMM DETACH REQUEST TLLI=0x%08x type=%s %s\n", |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1043 | msgb_tlli(msg), get_value_string(gprs_det_t_mo_strs, detach_type), |
| 1044 | power_off ? "Power-off" : ""); |
| 1045 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1046 | /* Only send the Detach Accept (MO) if power off isn't indicated, |
Jacob Erlbeck | b9ab0d4 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1047 | * see 04.08, 4.7.4.1.2/3 for details */ |
| 1048 | if (!power_off) { |
| 1049 | /* force_stby = 0 */ |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1050 | if (ctx) |
| 1051 | rc = gsm48_tx_gmm_det_ack(ctx, 0); |
| 1052 | else |
| 1053 | rc = gsm48_tx_gmm_det_ack_oldmsg(msg, 0); |
Jacob Erlbeck | b9ab0d4 | 2014-10-21 09:52:05 +0200 | [diff] [blame] | 1054 | } |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1055 | |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1056 | if (ctx) |
| 1057 | mm_ctx_cleanup_free(ctx, "GPRS DETACH REQUEST"); |
Jacob Erlbeck | 258ce3d | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 1058 | |
Harald Welte | bd5c912 | 2010-06-28 22:18:53 +0200 | [diff] [blame] | 1059 | return rc; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1060 | } |
| 1061 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1062 | /* Chapter 9.4.15: Routing area update accept */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1063 | static int gsm48_tx_gmm_ra_upd_ack(struct sgsn_mm_ctx *mm) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1064 | { |
| 1065 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1066 | struct gsm48_hdr *gh; |
| 1067 | struct gsm48_ra_upd_ack *rua; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1068 | uint8_t *mid; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1069 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1070 | LOGMMCTXP(LOGL_INFO, mm, "<- ROUTING AREA UPDATE ACCEPT\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1071 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1072 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1073 | |
| 1074 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1075 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1076 | gh->msg_type = GSM48_MT_GMM_RA_UPD_ACK; |
| 1077 | |
| 1078 | rua = (struct gsm48_ra_upd_ack *) msgb_put(msg, sizeof(*rua)); |
| 1079 | rua->force_stby = 0; /* not indicated */ |
| 1080 | rua->upd_result = 0; /* RA updated */ |
| 1081 | rua->ra_upd_timer = GPRS_TMR_MINUTE | 10; |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1082 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1083 | gsm48_construct_ra(rua->ra_id.digits, &mm->ra); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1084 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1085 | #if 0 |
| 1086 | /* Optional: P-TMSI signature */ |
| 1087 | msgb_v_put(msg, GSM48_IE_GMM_PTMSI_SIG); |
| 1088 | ptsig = msgb_put(msg, 3); |
| 1089 | ptsig[0] = mm->p_tmsi_sig >> 16; |
| 1090 | ptsig[1] = mm->p_tmsi_sig >> 8; |
| 1091 | ptsig[2] = mm->p_tmsi_sig & 0xff; |
| 1092 | #endif |
| 1093 | |
| 1094 | #ifdef PTMSI_ALLOC |
| 1095 | /* Optional: Allocated P-TMSI */ |
| 1096 | mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| 1097 | gsm48_generate_mid_from_tmsi(mid, mm->p_tmsi); |
| 1098 | mid[0] = GSM48_IE_GMM_ALLOC_PTMSI; |
| 1099 | #endif |
| 1100 | |
| 1101 | /* Option: MS ID, ... */ |
Harald Welte | 56a0145 | 2010-05-31 22:12:30 +0200 | [diff] [blame] | 1102 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | /* Chapter 9.4.17: Routing area update reject */ |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1106 | static int gsm48_tx_gmm_ra_upd_rej(struct msgb *old_msg, uint8_t cause) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1107 | { |
| 1108 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1109 | struct gsm48_hdr *gh; |
| 1110 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1111 | LOGP(DMM, LOGL_NOTICE, "<- ROUTING AREA UPDATE REJECT\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1112 | |
Harald Welte | 11d7c10 | 2010-05-02 11:54:55 +0200 | [diff] [blame] | 1113 | gmm_copy_id(msg, old_msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1114 | |
| 1115 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2); |
| 1116 | gh->proto_discr = GSM48_PDISC_MM_GPRS; |
| 1117 | gh->msg_type = GSM48_MT_GMM_RA_UPD_REJ; |
| 1118 | gh->data[0] = cause; |
| 1119 | gh->data[1] = 0; /* ? */ |
| 1120 | |
| 1121 | /* Option: P-TMSI signature, allocated P-TMSI, MS ID, ... */ |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1122 | return gsm48_gmm_sendmsg(msg, 0, NULL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1123 | } |
| 1124 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1125 | static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx, |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1126 | const uint8_t *pdp_status) |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1127 | { |
| 1128 | struct sgsn_pdp_ctx *pdp, *pdp2; |
| 1129 | /* 24.008 4.7.5.1.3: If the PDP context status information element is |
| 1130 | * included in ROUTING AREA UPDATE REQUEST message, then the network |
| 1131 | * shall deactivate all those PDP contexts locally (without peer to |
| 1132 | * peer signalling between the MS and the network), which are not in SM |
| 1133 | * state PDP-INACTIVE on network side but are indicated by the MS as |
| 1134 | * being in state PDP-INACTIVE. */ |
| 1135 | |
| 1136 | llist_for_each_entry_safe(pdp, pdp2, &mmctx->pdp_list, list) { |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1137 | if (pdp->nsapi < 8) { |
| 1138 | if (!(pdp_status[0] & (1 << pdp->nsapi))) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1139 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1140 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1141 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1142 | sgsn_delete_pdp_ctx(pdp); |
| 1143 | } |
| 1144 | } else { |
| 1145 | if (!(pdp_status[1] & (1 << (pdp->nsapi - 8)))) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1146 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Dropping PDP context for NSAPI=%u " |
Harald Welte | cdf76cf | 2011-08-05 21:23:46 +0200 | [diff] [blame] | 1147 | "due to PDP CTX STATUS IE= 0x%02x%02x\n", |
| 1148 | pdp->nsapi, pdp_status[1], pdp_status[0]); |
| 1149 | sgsn_delete_pdp_ctx(pdp); |
| 1150 | } |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1151 | } |
| 1152 | } |
| 1153 | } |
| 1154 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1155 | /* Chapter 9.4.14: Routing area update request */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1156 | static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1157 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1158 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1159 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1160 | uint8_t *cur = gh->data; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1161 | uint8_t ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1162 | struct gprs_ra_id old_ra_id; |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1163 | struct tlv_parsed tp; |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1164 | uint8_t upd_type; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1165 | enum gsm48_gmm_cause reject_cause; |
| 1166 | int rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1167 | |
| 1168 | /* Update Type 10.5.5.18 */ |
| 1169 | upd_type = *cur++ & 0x0f; |
| 1170 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1171 | LOGP(DMM, LOGL_INFO, "-> GMM RA UPDATE REQUEST type=\"%s\"\n", |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1172 | get_value_string(gprs_upd_t_strs, upd_type)); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1173 | |
| 1174 | /* Old routing area identification 10.5.5.15 */ |
| 1175 | gsm48_parse_ra(&old_ra_id, cur); |
| 1176 | cur += 6; |
| 1177 | |
| 1178 | /* MS Radio Access Capability 10.5.5.12a */ |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1179 | ms_ra_acc_cap_len = *cur++; |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1180 | if (ms_ra_acc_cap_len > 52) { |
| 1181 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1182 | goto rejected; |
| 1183 | } |
Harald Welte | 4b2ed35 | 2011-07-27 23:35:38 +0200 | [diff] [blame] | 1184 | cur += ms_ra_acc_cap_len; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1185 | |
| 1186 | /* Optional: Old P-TMSI Signature, Requested READY timer, TMSI Status, |
| 1187 | * DRX parameter, MS network capability */ |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1188 | tlv_parse(&tp, &gsm48_gmm_att_tlvdef, cur, |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1189 | (msg->data + msg->len) - cur, 0, 0); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1190 | |
| 1191 | switch (upd_type) { |
| 1192 | case GPRS_UPD_T_RA_LA: |
| 1193 | case GPRS_UPD_T_RA_LA_IMSI_ATT: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1194 | LOGP(DMM, LOGL_NOTICE, "Update type %i unsupported in Mode III, is your SI13 corrupt?\n", upd_type); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1195 | reject_cause = GMM_CAUSE_PROTO_ERR_UNSPEC; |
| 1196 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1197 | case GPRS_UPD_T_RA: |
| 1198 | case GPRS_UPD_T_PERIODIC: |
| 1199 | break; |
| 1200 | } |
| 1201 | |
| 1202 | /* Look-up the MM context based on old RA-ID and TLLI */ |
Harald Welte | f6bd340 | 2010-12-23 23:34:43 +0100 | [diff] [blame] | 1203 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1204 | if (!mmctx || mmctx->mm_state == GMM_DEREGISTERED) { |
Harald Welte | 2b697a6 | 2011-10-16 18:50:56 +0200 | [diff] [blame] | 1205 | /* send a XID reset to re-set all LLC sequence numbers |
| 1206 | * in the MS */ |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1207 | LOGP(DMM, LOGL_NOTICE, "LLC XID RESET\n"); |
Harald Welte | 2b697a6 | 2011-10-16 18:50:56 +0200 | [diff] [blame] | 1208 | gprs_llgmm_reset(llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1209 | /* The MS has to perform GPRS attach */ |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1210 | /* Device is still IMSI attached for CS but initiate GPRS ATTACH, |
| 1211 | * see GSM 04.08, 4.7.5.1.4 and G.6 */ |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1212 | reject_cause = GMM_CAUSE_IMPL_DETACHED; |
| 1213 | goto rejected; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1214 | } |
| 1215 | |
Harald Welte | f0901f0 | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 1216 | /* Store new BVCI/NSEI in MM context (FIXME: delay until we ack?) */ |
| 1217 | msgid2mmctx(mmctx, msg); |
| 1218 | /* Bump the statistics of received signalling msgs for this MM context */ |
| 1219 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
| 1220 | |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1221 | /* Update the MM context with the new RA-ID */ |
| 1222 | bssgp_parse_cell_id(&mmctx->ra, msgb_bcid(msg)); |
Harald Welte | f0901f0 | 2010-12-26 10:39:26 +0100 | [diff] [blame] | 1223 | /* Update the MM context with the new (i.e. foreign) TLLI */ |
Harald Welte | 9f1f3ad | 2010-05-02 12:56:57 +0200 | [diff] [blame] | 1224 | mmctx->tlli = msgb_tlli(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1225 | /* FIXME: Update the MM context with the MS radio acc capabilities */ |
| 1226 | /* FIXME: Update the MM context with the MS network capabilities */ |
| 1227 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1228 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_RA_UPDATE]); |
| 1229 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1230 | #ifdef PTMSI_ALLOC |
Jacob Erlbeck | f6e7d99 | 2014-11-06 15:43:10 +0100 | [diff] [blame] | 1231 | /* Don't change the P-TMSI if a P-TMSI re-assignment is under way */ |
| 1232 | if (mmctx->mm_state != GMM_COMMON_PROC_INIT) { |
| 1233 | mmctx->p_tmsi_old = mmctx->p_tmsi; |
| 1234 | mmctx->p_tmsi = sgsn_alloc_ptmsi(); |
| 1235 | } |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1236 | /* Start T3350 and re-transmit up to 5 times until ATTACH COMPLETE */ |
| 1237 | mmctx->t3350_mode = GMM_T3350_MODE_RAU; |
| 1238 | mmctx_timer_start(mmctx, 3350, GSM0408_T3350_SECS); |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1239 | |
| 1240 | mmctx->mm_state = GMM_COMMON_PROC_INIT; |
| 1241 | #else |
| 1242 | /* Make sure we are NORMAL (i.e. not SUSPENDED anymore) */ |
| 1243 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1244 | #endif |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1245 | /* Even if there is no P-TMSI allocated, the MS will switch from |
| 1246 | * foreign TLLI to local TLLI */ |
| 1247 | mmctx->tlli_new = gprs_tmsi2tlli(mmctx->p_tmsi, TLLI_LOCAL); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1248 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1249 | /* Inform LLC layer about new TLLI but keep old active */ |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1250 | gprs_llgmm_assign(mmctx->llme, mmctx->tlli, mmctx->tlli_new, |
| 1251 | GPRS_ALGO_GEA0, NULL); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1252 | |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1253 | /* Look at PDP Context Status IE and see if MS's view of |
| 1254 | * activated/deactivated NSAPIs agrees with our view */ |
| 1255 | if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) { |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1256 | const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS); |
Harald Welte | 588d44e | 2010-06-09 10:28:29 +0200 | [diff] [blame] | 1257 | process_ms_ctx_status(mmctx, pdp_status); |
| 1258 | } |
| 1259 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1260 | /* Send RA UPDATE ACCEPT */ |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1261 | return gsm48_tx_gmm_ra_upd_ack(mmctx); |
Jacob Erlbeck | 80d07e3 | 2014-11-06 13:43:41 +0100 | [diff] [blame] | 1262 | |
| 1263 | rejected: |
| 1264 | /* Send RA UPDATE REJECT */ |
| 1265 | LOGMMCTXP(LOGL_NOTICE, mmctx, |
| 1266 | "Rejecting RA Update Request with cause '%s' (%d)\n", |
| 1267 | get_value_string(gmm_cause_names, reject_cause), reject_cause); |
| 1268 | rc = gsm48_tx_gmm_ra_upd_rej(msg, reject_cause); |
| 1269 | if (mmctx) |
| 1270 | mm_ctx_cleanup_free(mmctx, "GPRS RA UPDATE REJ"); |
| 1271 | else |
| 1272 | /* TLLI unassignment */ |
| 1273 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, GPRS_ALGO_GEA0, |
| 1274 | NULL); |
| 1275 | |
| 1276 | return rc; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1277 | } |
| 1278 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1279 | static int gsm48_rx_gmm_status(struct sgsn_mm_ctx *mmctx, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1280 | { |
| 1281 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1282 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1283 | LOGMMCTXP(LOGL_INFO, mmctx, "-> GPRS MM STATUS (cause: %s)\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1284 | get_value_string(gmm_cause_names, gh->data[0])); |
| 1285 | |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | /* GPRS Mobility Management */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1290 | static int gsm0408_rcv_gmm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1291 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1292 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1293 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1294 | int rc; |
| 1295 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1296 | /* MMCTX can be NULL when called */ |
| 1297 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1298 | if (!mmctx && |
| 1299 | gh->msg_type != GSM48_MT_GMM_ATTACH_REQ && |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1300 | gh->msg_type != GSM48_MT_GMM_RA_UPD_REQ) { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1301 | LOGP(DMM, LOGL_NOTICE, "Cannot handle GMM for unknown MM CTX\n"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1302 | /* 4.7.10 */ |
Jacob Erlbeck | 14ae582 | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1303 | if (gh->msg_type == GSM48_MT_GMM_STATUS) { |
| 1304 | /* TLLI unassignment */ |
| 1305 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1306 | GPRS_ALGO_GEA0, NULL); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1307 | return 0; |
Jacob Erlbeck | 14ae582 | 2014-10-28 09:47:03 +0100 | [diff] [blame] | 1308 | } |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1309 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1310 | /* Don't reply or establish a LLME on DETACH_ACK */ |
| 1311 | if (gh->msg_type == GSM48_MT_GMM_DETACH_ACK) { |
| 1312 | /* TLLI unassignment */ |
| 1313 | return gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1314 | GPRS_ALGO_GEA0, NULL); |
| 1315 | } |
| 1316 | |
Jacob Erlbeck | c4f9bf3 | 2014-11-11 08:55:13 +0100 | [diff] [blame] | 1317 | gprs_llgmm_reset(llme); |
| 1318 | |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1319 | /* Don't force it into re-attachment */ |
| 1320 | if (gh->msg_type == GSM48_MT_GMM_DETACH_REQ) { |
Jacob Erlbeck | 5a38f64 | 2014-10-21 13:09:55 +0200 | [diff] [blame] | 1321 | /* Handle Detach Request */ |
| 1322 | rc = gsm48_rx_gmm_det_req(NULL, msg); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1323 | |
| 1324 | /* TLLI unassignment */ |
| 1325 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1326 | GPRS_ALGO_GEA0, NULL); |
| 1327 | return rc; |
| 1328 | } |
| 1329 | |
| 1330 | /* Force the MS to re-attach */ |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1331 | rc = sgsn_force_reattach_oldmsg(msg); |
| 1332 | |
| 1333 | /* TLLI unassignment */ |
| 1334 | gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, |
| 1335 | GPRS_ALGO_GEA0, NULL); |
| 1336 | return rc; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1337 | } |
| 1338 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1339 | switch (gh->msg_type) { |
| 1340 | case GSM48_MT_GMM_RA_UPD_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1341 | rc = gsm48_rx_gmm_ra_upd_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1342 | break; |
| 1343 | case GSM48_MT_GMM_ATTACH_REQ: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1344 | rc = gsm48_rx_gmm_att_req(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1345 | break; |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1346 | /* For all the following types mmctx can not be NULL */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1347 | case GSM48_MT_GMM_ID_RESP: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1348 | rc = gsm48_rx_gmm_id_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1349 | break; |
| 1350 | case GSM48_MT_GMM_STATUS: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1351 | rc = gsm48_rx_gmm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1352 | break; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1353 | case GSM48_MT_GMM_DETACH_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1354 | rc = gsm48_rx_gmm_det_req(mmctx, msg); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1355 | break; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1356 | case GSM48_MT_GMM_DETACH_ACK: |
| 1357 | LOGMMCTXP(LOGL_INFO, mmctx, "-> DETACH ACK\n"); |
| 1358 | mm_ctx_cleanup_free(mmctx, "GPRS DETACH ACK"); |
| 1359 | rc = 0; |
| 1360 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1361 | case GSM48_MT_GMM_ATTACH_COMPL: |
| 1362 | /* only in case SGSN offered new P-TMSI */ |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1363 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ATTACH COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1364 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1365 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1366 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1367 | mmctx->pending_req = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1368 | /* Unassign the old TLLI */ |
| 1369 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1370 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1371 | GPRS_ALGO_GEA0, NULL); |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1372 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1373 | rc = 0; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1374 | break; |
Harald Welte | ab1d562 | 2010-05-18 19:58:38 +0200 | [diff] [blame] | 1375 | case GSM48_MT_GMM_RA_UPD_COMPL: |
| 1376 | /* only in case SGSN offered new P-TMSI */ |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1377 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ROUTEING AREA UPDATE COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1378 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1379 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1380 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1381 | mmctx->pending_req = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1382 | /* Unassign the old TLLI */ |
| 1383 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1384 | gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, |
| 1385 | GPRS_ALGO_GEA0, NULL); |
Jacob Erlbeck | 0074a77 | 2014-10-28 16:23:46 +0100 | [diff] [blame] | 1386 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1387 | rc = 0; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1388 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1389 | case GSM48_MT_GMM_PTMSI_REALL_COMPL: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1390 | LOGMMCTXP(LOGL_INFO, mmctx, "-> PTMSI REALLLICATION COMPLETE\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1391 | mmctx_timer_stop(mmctx, 3350); |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1392 | mmctx->t3350_mode = GMM_T3350_MODE_NONE; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1393 | mmctx->p_tmsi_old = 0; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1394 | mmctx->pending_req = 0; |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1395 | /* Unassign the old TLLI */ |
| 1396 | mmctx->tlli = mmctx->tlli_new; |
Harald Welte | d6f582b | 2010-06-30 23:18:57 +0200 | [diff] [blame] | 1397 | //gprs_llgmm_assign(mmctx->llme, 0xffffffff, mmctx->tlli_new, GPRS_ALGO_GEA0, NULL); |
Holger Hans Peter Freyther | 2b17454 | 2011-10-14 23:31:34 +0200 | [diff] [blame] | 1398 | rc = 0; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1399 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1400 | case GSM48_MT_GMM_AUTH_CIPH_RESP: |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1401 | rc = gsm48_rx_gmm_auth_ciph_resp(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1402 | break; |
| 1403 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1404 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GMM msg type 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1405 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1406 | rc = gsm48_tx_gmm_status(mmctx, GMM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1407 | break; |
| 1408 | } |
| 1409 | |
| 1410 | return rc; |
| 1411 | } |
| 1412 | |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1413 | static void mmctx_timer_cb(void *_mm) |
| 1414 | { |
| 1415 | struct sgsn_mm_ctx *mm = _mm; |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1416 | struct gsm_auth_tuple *at; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1417 | |
| 1418 | mm->num_T_exp++; |
| 1419 | |
| 1420 | switch (mm->T) { |
| 1421 | case 3350: /* waiting for ATTACH COMPLETE */ |
| 1422 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1423 | LOGMMCTXP(LOGL_NOTICE, mm, "T3350 expired >= 5 times\n"); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1424 | mm_ctx_cleanup_free(mm, "T3350"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1425 | /* FIXME: should we return some error? */ |
| 1426 | break; |
| 1427 | } |
| 1428 | /* re-transmit the respective msg and re-start timer */ |
| 1429 | switch (mm->t3350_mode) { |
| 1430 | case GMM_T3350_MODE_ATT: |
| 1431 | gsm48_tx_gmm_att_ack(mm); |
| 1432 | break; |
| 1433 | case GMM_T3350_MODE_RAU: |
| 1434 | gsm48_tx_gmm_ra_upd_ack(mm); |
| 1435 | break; |
| 1436 | case GMM_T3350_MODE_PTMSI_REALL: |
| 1437 | /* FIXME */ |
| 1438 | break; |
Jacob Erlbeck | 93eae8e | 2014-10-28 12:23:29 +0100 | [diff] [blame] | 1439 | case GMM_T3350_MODE_NONE: |
| 1440 | LOGMMCTXP(LOGL_NOTICE, mm, |
| 1441 | "T3350 mode wasn't set, ignoring timeout\n"); |
| 1442 | break; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1443 | } |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1444 | osmo_timer_schedule(&mm->timer, GSM0408_T3350_SECS, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1445 | break; |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1446 | case 3360: /* waiting for AUTH AND CIPH RESP */ |
| 1447 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1448 | LOGMMCTXP(LOGL_NOTICE, mm, "T3360 expired >= 5 times\n"); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1449 | mm_ctx_cleanup_free(mm, "T3360"); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1450 | break; |
| 1451 | } |
Jacob Erlbeck | bd0cf11 | 2014-12-01 12:33:33 +0100 | [diff] [blame] | 1452 | /* Re-transmit the respective msg and re-start timer */ |
| 1453 | if (mm->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 1454 | LOGMMCTXP(LOGL_ERROR, mm, |
| 1455 | "timeout: invalid auth triplet reference\n"); |
| 1456 | mm_ctx_cleanup_free(mm, "T3360"); |
| 1457 | break; |
| 1458 | } |
| 1459 | at = &mm->auth_triplet; |
| 1460 | |
| 1461 | gsm48_tx_gmm_auth_ciph_req(mm, at->rand, at->key_seq, GPRS_ALGO_GEA0); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1462 | osmo_timer_schedule(&mm->timer, GSM0408_T3360_SECS, 0); |
Harald Welte | 4b6ac1e | 2010-07-03 11:09:06 +0200 | [diff] [blame] | 1463 | break; |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1464 | case 3370: /* waiting for IDENTITY RESPONSE */ |
| 1465 | if (mm->num_T_exp >= 5) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1466 | LOGMMCTXP(LOGL_NOTICE, mm, "T3370 expired >= 5 times\n"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1467 | gsm48_tx_gmm_att_rej(mm, GMM_CAUSE_MS_ID_NOT_DERIVED); |
Jacob Erlbeck | a790456 | 2014-11-03 10:12:52 +0100 | [diff] [blame] | 1468 | mm_ctx_cleanup_free(mm, "GPRS ATTACH REJECT (T3370)"); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1469 | break; |
| 1470 | } |
| 1471 | /* re-tranmit IDENTITY REQUEST and re-start timer */ |
| 1472 | gsm48_tx_gmm_id_req(mm, mm->t3370_id_type); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1473 | osmo_timer_schedule(&mm->timer, GSM0408_T3370_SECS, 0); |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1474 | break; |
| 1475 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1476 | LOGMMCTXP(LOGL_ERROR, mm, "timer expired in unknown mode %u\n", |
Harald Welte | c2e8cc4 | 2010-05-31 20:23:38 +0200 | [diff] [blame] | 1477 | mm->T); |
| 1478 | } |
| 1479 | } |
| 1480 | |
| 1481 | /* GPRS SESSION MANAGEMENT */ |
| 1482 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1483 | static void pdpctx_timer_cb(void *_mm); |
| 1484 | |
| 1485 | static void pdpctx_timer_start(struct sgsn_pdp_ctx *pdp, unsigned int T, |
| 1486 | unsigned int seconds) |
| 1487 | { |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1488 | if (osmo_timer_pending(&pdp->timer)) |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1489 | LOGP(DMM, LOGL_ERROR, "Starting MM timer %u while old " |
| 1490 | "timer %u pending\n", T, pdp->T); |
| 1491 | pdp->T = T; |
| 1492 | pdp->num_T_exp = 0; |
| 1493 | |
| 1494 | /* FIXME: we should do this only once ? */ |
| 1495 | pdp->timer.data = pdp; |
| 1496 | pdp->timer.cb = &pdpctx_timer_cb; |
| 1497 | |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1498 | osmo_timer_schedule(&pdp->timer, seconds, 0); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1499 | } |
| 1500 | |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1501 | #if 0 |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1502 | static void msgb_put_pdp_addr_ipv4(struct msgb *msg, uint32_t ipaddr) |
| 1503 | { |
| 1504 | uint8_t v[6]; |
| 1505 | |
| 1506 | v[0] = PDP_TYPE_ORG_IETF; |
| 1507 | v[1] = PDP_TYPE_N_IETF_IPv4; |
| 1508 | *(uint32_t *)(v+2) = htonl(ipaddr); |
| 1509 | |
| 1510 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1511 | } |
| 1512 | |
| 1513 | static void msgb_put_pdp_addr_ppp(struct msgb *msg) |
| 1514 | { |
| 1515 | uint8_t v[2]; |
| 1516 | |
| 1517 | v[0] = PDP_TYPE_ORG_ETSI; |
| 1518 | v[1] = PDP_TYPE_N_ETSI_PPP; |
| 1519 | |
| 1520 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, sizeof(v), v); |
| 1521 | } |
Holger Hans Peter Freyther | 1768a57 | 2014-04-04 12:40:34 +0200 | [diff] [blame] | 1522 | #endif |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1523 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1524 | /* Section 9.5.2: Ativate PDP Context Accept */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1525 | int gsm48_tx_gsm_act_pdp_acc(struct sgsn_pdp_ctx *pdp) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1526 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1527 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1528 | struct gsm48_hdr *gh; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1529 | uint8_t transaction_id = pdp->ti ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1530 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1531 | LOGPDPCTXP(LOGL_INFO, pdp, "<- ACTIVATE PDP CONTEXT ACK\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1532 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1533 | mmctx2msgid(msg, pdp->mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1534 | |
| 1535 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1536 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1537 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_ACK; |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1538 | |
| 1539 | /* Negotiated LLC SAPI */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1540 | msgb_v_put(msg, pdp->sapi); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1541 | |
Harald Welte | 55e0df7 | 2010-05-18 13:20:08 +0200 | [diff] [blame] | 1542 | /* FIXME: copy QoS parameters from original request */ |
| 1543 | //msgb_lv_put(msg, pdp->lib->qos_neg.l, pdp->lib->qos_neg.v); |
| 1544 | msgb_lv_put(msg, sizeof(default_qos), (uint8_t *)&default_qos); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1545 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1546 | /* Radio priority 10.5.7.2 */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1547 | msgb_v_put(msg, pdp->lib->radio_pri); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1548 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1549 | /* PDP address */ |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1550 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 1551 | * the IE is identical with the 04.08 PDP Address IE */ |
| 1552 | pdp->lib->eua.v[0] &= ~0xf0; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1553 | msgb_tlv_put(msg, GSM48_IE_GSM_PDP_ADDR, |
| 1554 | pdp->lib->eua.l, pdp->lib->eua.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1555 | pdp->lib->eua.v[0] |= 0xf0; |
| 1556 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1557 | /* Optional: Protocol configuration options (FIXME: why 'req') */ |
Holger Hans Peter Freyther | d219507 | 2014-04-04 11:55:21 +0200 | [diff] [blame] | 1558 | if (pdp->lib->pco_req.l) |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1559 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, |
Harald Welte | 3c0b9b9 | 2010-05-18 14:36:11 +0200 | [diff] [blame] | 1560 | pdp->lib->pco_req.l, pdp->lib->pco_req.v); |
Harald Welte | 4e38ac7 | 2010-05-18 14:51:18 +0200 | [diff] [blame] | 1561 | |
Harald Welte | 421cba4 | 2010-05-02 23:11:50 +0200 | [diff] [blame] | 1562 | /* Optional: Packet Flow Identifier */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1563 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1564 | return gsm48_gmm_sendmsg(msg, 0, pdp->mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1565 | } |
| 1566 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1567 | /* Section 9.5.3: Activate PDP Context reject */ |
| 1568 | int gsm48_tx_gsm_act_pdp_rej(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1569 | uint8_t cause, uint8_t pco_len, uint8_t *pco_v) |
| 1570 | { |
| 1571 | struct msgb *msg = gsm48_msgb_alloc(); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1572 | struct gsm48_hdr *gh; |
| 1573 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1574 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1575 | LOGMMCTXP(LOGL_NOTICE, mm, "<- ACTIVATE PDP CONTEXT REJ(cause=%u)\n", cause); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1576 | |
| 1577 | mmctx2msgid(msg, mm); |
| 1578 | |
| 1579 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1580 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1581 | gh->msg_type = GSM48_MT_GSM_ACT_PDP_REJ; |
| 1582 | |
| 1583 | msgb_v_put(msg, cause); |
| 1584 | if (pco_len && pco_v) |
| 1585 | msgb_tlv_put(msg, GSM48_IE_GSM_PROTO_CONF_OPT, pco_len, pco_v); |
| 1586 | |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1587 | return gsm48_gmm_sendmsg(msg, 0, mm); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1588 | } |
| 1589 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1590 | /* Section 9.5.8: Deactivate PDP Context Request */ |
| 1591 | static int _gsm48_tx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, uint8_t tid, |
| 1592 | uint8_t sm_cause) |
| 1593 | { |
| 1594 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1595 | struct gsm48_hdr *gh; |
| 1596 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
| 1597 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1598 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT REQ\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1599 | |
| 1600 | mmctx2msgid(msg, mm); |
| 1601 | |
| 1602 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1603 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1604 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_REQ; |
| 1605 | |
| 1606 | msgb_v_put(msg, sm_cause); |
| 1607 | |
| 1608 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1609 | } |
| 1610 | int gsm48_tx_gsm_deact_pdp_req(struct sgsn_pdp_ctx *pdp, uint8_t sm_cause) |
| 1611 | { |
| 1612 | pdpctx_timer_start(pdp, 3395, GSM0408_T3395_SECS); |
| 1613 | |
| 1614 | return _gsm48_tx_gsm_deact_pdp_req(pdp->mm, pdp->ti, sm_cause); |
| 1615 | } |
| 1616 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1617 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1618 | static int _gsm48_tx_gsm_deact_pdp_acc(struct sgsn_mm_ctx *mm, uint8_t tid) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1619 | { |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1620 | struct msgb *msg = gsm48_msgb_alloc(); |
| 1621 | struct gsm48_hdr *gh; |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1622 | uint8_t transaction_id = tid ^ 0x8; /* flip */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1623 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1624 | LOGMMCTXP(LOGL_INFO, mm, "<- DEACTIVATE PDP CONTEXT ACK\n"); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1625 | |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1626 | mmctx2msgid(msg, mm); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1627 | |
| 1628 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 1629 | gh->proto_discr = GSM48_PDISC_SM_GPRS | (transaction_id << 4); |
| 1630 | gh->msg_type = GSM48_MT_GSM_DEACT_PDP_ACK; |
| 1631 | |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1632 | return gsm48_gmm_sendmsg(msg, 0, mm); |
| 1633 | } |
| 1634 | int gsm48_tx_gsm_deact_pdp_acc(struct sgsn_pdp_ctx *pdp) |
| 1635 | { |
| 1636 | return _gsm48_tx_gsm_deact_pdp_acc(pdp->mm, pdp->ti); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1637 | } |
| 1638 | |
| 1639 | /* Section 9.5.1: Activate PDP Context Request */ |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1640 | static int gsm48_rx_gsm_act_pdp_req(struct sgsn_mm_ctx *mmctx, |
| 1641 | struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1642 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1643 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1644 | struct gsm48_act_pdp_ctx_req *act_req = (struct gsm48_act_pdp_ctx_req *) gh->data; |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1645 | uint8_t req_qos_len, req_pdpa_len; |
| 1646 | uint8_t *req_qos, *req_pdpa; |
| 1647 | struct tlv_parsed tp; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1648 | uint8_t transaction_id = (gh->proto_discr >> 4); |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1649 | struct sgsn_ggsn_ctx *ggsn; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1650 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1651 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1652 | LOGMMCTXP(LOGL_INFO, mmctx, "-> ACTIVATE PDP CONTEXT REQ: SAPI=%u NSAPI=%u ", |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1653 | act_req->req_llc_sapi, act_req->req_nsapi); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1654 | |
Harald Welte | 23c1376 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1655 | /* FIXME: length checks! */ |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1656 | req_qos_len = act_req->data[0]; |
| 1657 | req_qos = act_req->data + 1; /* 10.5.6.5 */ |
| 1658 | req_pdpa_len = act_req->data[1 + req_qos_len]; |
| 1659 | req_pdpa = act_req->data + 1 + req_qos_len + 1; /* 10.5.6.4 */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1660 | |
Harald Welte | 23c1376 | 2010-07-02 22:52:04 +0200 | [diff] [blame] | 1661 | /* Optional: Access Point Name, Protocol Config Options */ |
| 1662 | if (req_pdpa + req_pdpa_len < msg->data + msg->len) |
| 1663 | tlv_parse(&tp, &gsm48_sm_att_tlvdef, req_pdpa + req_pdpa_len, |
| 1664 | (msg->data + msg->len) - (req_pdpa + req_pdpa_len), 0, 0); |
| 1665 | else |
| 1666 | memset(&tp, 0, sizeof(tp)); |
| 1667 | |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1668 | switch (req_pdpa[0] & 0xf) { |
| 1669 | case 0x0: |
| 1670 | DEBUGPC(DMM, "ETSI "); |
| 1671 | break; |
| 1672 | case 0x1: |
| 1673 | DEBUGPC(DMM, "IETF "); |
| 1674 | break; |
| 1675 | case 0xf: |
| 1676 | DEBUGPC(DMM, "Empty "); |
| 1677 | break; |
| 1678 | } |
| 1679 | |
| 1680 | switch (req_pdpa[1]) { |
| 1681 | case 0x21: |
| 1682 | DEBUGPC(DMM, "IPv4 "); |
| 1683 | if (req_pdpa_len >= 6) { |
| 1684 | struct in_addr ia; |
| 1685 | ia.s_addr = ntohl(*((uint32_t *) (req_pdpa+2))); |
| 1686 | DEBUGPC(DMM, "%s ", inet_ntoa(ia)); |
| 1687 | } |
| 1688 | break; |
| 1689 | case 0x57: |
| 1690 | DEBUGPC(DMM, "IPv6 "); |
| 1691 | if (req_pdpa_len >= 18) { |
| 1692 | /* FIXME: print IPv6 address */ |
| 1693 | } |
| 1694 | break; |
| 1695 | default: |
| 1696 | DEBUGPC(DMM, "0x%02x ", req_pdpa[1]); |
| 1697 | break; |
| 1698 | } |
| 1699 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1700 | LOGPC(DMM, LOGL_INFO, "\n"); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1701 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1702 | /* put the non-TLV elements in the TLV parser structure to |
| 1703 | * pass them on to the SGSN / GTP code */ |
| 1704 | tp.lv[OSMO_IE_GSM_REQ_QOS].len = req_qos_len; |
| 1705 | tp.lv[OSMO_IE_GSM_REQ_QOS].val = req_qos; |
| 1706 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].len = req_pdpa_len; |
| 1707 | tp.lv[OSMO_IE_GSM_REQ_PDP_ADDR].val = req_pdpa; |
| 1708 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1709 | /* FIXME: determine GGSN based on APN and subscription options */ |
Harald Welte | 0c3eae0 | 2010-05-02 21:07:14 +0200 | [diff] [blame] | 1710 | if (TLVP_PRESENT(&tp, GSM48_IE_GSM_APN)) {} |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1711 | |
| 1712 | /* Check if NSAPI is out of range (TS 04.65 / 7.2) */ |
| 1713 | if (act_req->req_nsapi < 5 || act_req->req_nsapi > 15) { |
| 1714 | /* Send reject with GSM_CAUSE_INV_MAND_INFO */ |
| 1715 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1716 | GSM_CAUSE_INV_MAND_INFO, |
| 1717 | 0, NULL); |
| 1718 | } |
| 1719 | |
| 1720 | /* Check if NSAPI is already in use */ |
Harald Welte | b37515e | 2010-07-02 10:12:58 +0200 | [diff] [blame] | 1721 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, act_req->req_nsapi); |
| 1722 | if (pdp) { |
| 1723 | /* We already have a PDP context for this TLLI + NSAPI tuple */ |
| 1724 | if (pdp->sapi == act_req->req_llc_sapi && |
| 1725 | pdp->ti == transaction_id) { |
| 1726 | /* This apparently is a re-transmission of a PDP CTX |
| 1727 | * ACT REQ (our ACT ACK must have got dropped) */ |
| 1728 | return gsm48_tx_gsm_act_pdp_acc(pdp); |
| 1729 | } |
| 1730 | |
| 1731 | /* Send reject with GSM_CAUSE_NSAPI_IN_USE */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1732 | return gsm48_tx_gsm_act_pdp_rej(mmctx, transaction_id, |
| 1733 | GSM_CAUSE_NSAPI_IN_USE, |
| 1734 | 0, NULL); |
| 1735 | } |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1736 | |
Harald Welte | 19f9e30 | 2010-07-02 10:15:49 +0200 | [diff] [blame] | 1737 | /* Only increment counter for a real activation, after we checked |
| 1738 | * for re-transmissions */ |
| 1739 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PDP_CTX_ACT]); |
| 1740 | |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1741 | ggsn = sgsn_ggsn_ctx_by_id(0); |
| 1742 | if (!ggsn) { |
| 1743 | LOGP(DGPRS, LOGL_ERROR, "No GGSN context 0 found!\n"); |
| 1744 | return -EIO; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1745 | } |
Harald Welte | 11ff3e8 | 2010-07-02 10:17:24 +0200 | [diff] [blame] | 1746 | ggsn->gsn = sgsn->gsn; |
| 1747 | pdp = sgsn_create_pdp_ctx(ggsn, mmctx, act_req->req_nsapi, &tp); |
| 1748 | if (!pdp) |
| 1749 | return -1; |
| 1750 | |
| 1751 | /* Store SAPI and Transaction Identifier */ |
| 1752 | pdp->sapi = act_req->req_llc_sapi; |
| 1753 | pdp->ti = transaction_id; |
| 1754 | |
Harald Welte | 6463c07 | 2010-05-18 17:04:55 +0200 | [diff] [blame] | 1755 | return 0; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1756 | } |
| 1757 | |
| 1758 | /* Section 9.5.8: Deactivate PDP Context Request */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1759 | static int gsm48_rx_gsm_deact_pdp_req(struct sgsn_mm_ctx *mm, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1760 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1761 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1762 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1763 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1764 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1765 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT REQ (cause: %s)\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1766 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1767 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1768 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1769 | if (!pdp) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1770 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Request for " |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1771 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1772 | mm->imsi, transaction_id); |
Harald Welte | 60ebc02 | 2010-06-08 18:08:59 +0200 | [diff] [blame] | 1773 | return _gsm48_tx_gsm_deact_pdp_acc(mm, transaction_id); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1774 | } |
| 1775 | |
| 1776 | return sgsn_delete_pdp_ctx(pdp); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1777 | } |
| 1778 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1779 | /* Section 9.5.9: Deactivate PDP Context Accept */ |
| 1780 | static int gsm48_rx_gsm_deact_pdp_ack(struct sgsn_mm_ctx *mm, struct msgb *msg) |
| 1781 | { |
| 1782 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
| 1783 | uint8_t transaction_id = (gh->proto_discr >> 4); |
| 1784 | struct sgsn_pdp_ctx *pdp; |
| 1785 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1786 | LOGMMCTXP(LOGL_INFO, mm, "-> DEACTIVATE PDP CONTEXT ACK\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1787 | |
| 1788 | pdp = sgsn_pdp_ctx_by_tid(mm, transaction_id); |
| 1789 | if (!pdp) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1790 | LOGMMCTXP(LOGL_NOTICE, mm, "Deactivate PDP Context Accept for " |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1791 | "non-existing PDP Context (IMSI=%s, TI=%u)\n", |
| 1792 | mm->imsi, transaction_id); |
| 1793 | return 0; |
| 1794 | } |
| 1795 | |
| 1796 | return sgsn_delete_pdp_ctx(pdp); |
| 1797 | } |
| 1798 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1799 | static int gsm48_rx_gsm_status(struct sgsn_mm_ctx *ctx, struct msgb *msg) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1800 | { |
| 1801 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 1802 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1803 | LOGMMCTXP(LOGL_INFO, ctx, "-> GPRS SM STATUS (cause: %s)\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1804 | get_value_string(gsm_cause_names, gh->data[0])); |
| 1805 | |
| 1806 | return 0; |
| 1807 | } |
| 1808 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1809 | static void pdpctx_timer_cb(void *_pdp) |
| 1810 | { |
| 1811 | struct sgsn_pdp_ctx *pdp = _pdp; |
| 1812 | |
| 1813 | pdp->num_T_exp++; |
| 1814 | |
| 1815 | switch (pdp->T) { |
| 1816 | case 3395: /* waiting for PDP CTX DEACT ACK */ |
| 1817 | if (pdp->num_T_exp >= 4) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1818 | LOGPDPCTXP(LOGL_NOTICE, pdp, "T3395 expired >= 5 times\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1819 | pdp->state = PDP_STATE_INACTIVE; |
| 1820 | sgsn_delete_pdp_ctx(pdp); |
| 1821 | break; |
| 1822 | } |
| 1823 | gsm48_tx_gsm_deact_pdp_req(pdp, GSM_CAUSE_NET_FAIL); |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 1824 | osmo_timer_schedule(&pdp->timer, GSM0408_T3395_SECS, 0); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1825 | break; |
| 1826 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1827 | LOGPDPCTXP(LOGL_ERROR, pdp, "timer expired in unknown mode %u\n", |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1828 | pdp->T); |
| 1829 | } |
| 1830 | } |
| 1831 | |
| 1832 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1833 | /* GPRS Session Management */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1834 | static int gsm0408_rcv_gsm(struct sgsn_mm_ctx *mmctx, struct msgb *msg, |
| 1835 | struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1836 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1837 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1838 | int rc; |
| 1839 | |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1840 | /* MMCTX can be NULL when called */ |
| 1841 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1842 | if (!mmctx) { |
| 1843 | LOGP(DMM, LOGL_NOTICE, "Cannot handle SM for unknown MM CTX\n"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1844 | /* 6.1.3.6 */ |
| 1845 | if (gh->msg_type == GSM48_MT_GSM_STATUS) |
| 1846 | return 0; |
| 1847 | |
| 1848 | return sgsn_force_reattach_oldmsg(msg); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1849 | } |
| 1850 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1851 | switch (gh->msg_type) { |
| 1852 | case GSM48_MT_GSM_ACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1853 | rc = gsm48_rx_gsm_act_pdp_req(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1854 | break; |
| 1855 | case GSM48_MT_GSM_DEACT_PDP_REQ: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1856 | rc = gsm48_rx_gsm_deact_pdp_req(mmctx, msg); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 1857 | break; |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 1858 | case GSM48_MT_GSM_DEACT_PDP_ACK: |
| 1859 | rc = gsm48_rx_gsm_deact_pdp_ack(mmctx, msg); |
| 1860 | break; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1861 | case GSM48_MT_GSM_STATUS: |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1862 | rc = gsm48_rx_gsm_status(mmctx, msg); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1863 | break; |
| 1864 | case GSM48_MT_GSM_REQ_PDP_ACT_REJ: |
| 1865 | case GSM48_MT_GSM_ACT_AA_PDP_REQ: |
| 1866 | case GSM48_MT_GSM_DEACT_AA_PDP_REQ: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1867 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unimplemented GSM 04.08 GSM msg type 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1868 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1869 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1870 | break; |
| 1871 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1872 | LOGMMCTXP(LOGL_NOTICE, mmctx, "Unknown GSM 04.08 GSM msg type 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1873 | gh->msg_type); |
Harald Welte | f54e7e2 | 2010-06-09 10:51:23 +0200 | [diff] [blame] | 1874 | rc = gsm48_tx_sm_status(mmctx, GSM_CAUSE_MSGT_NOTEXIST_NOTIMPL); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1875 | break; |
| 1876 | |
| 1877 | } |
| 1878 | |
| 1879 | return rc; |
| 1880 | } |
| 1881 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1882 | int gsm0408_gprs_force_reattach_oldmsg(struct msgb *msg) |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1883 | { |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1884 | int rc; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1885 | gprs_llgmm_reset_oldmsg(msg, GPRS_SAPI_GMM); |
| 1886 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1887 | rc = gsm48_tx_gmm_detach_req_oldmsg( |
| 1888 | msg, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1889 | |
Jacob Erlbeck | abdf02b | 2014-10-31 12:20:49 +0100 | [diff] [blame] | 1890 | return rc; |
| 1891 | } |
| 1892 | |
| 1893 | int gsm0408_gprs_force_reattach(struct sgsn_mm_ctx *mmctx) |
| 1894 | { |
| 1895 | int rc; |
| 1896 | gprs_llgmm_reset(mmctx->llme); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1897 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1898 | rc = gsm48_tx_gmm_detach_req( |
| 1899 | mmctx, GPRS_DET_T_MT_REATT_REQ, GMM_CAUSE_IMPL_DETACHED); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1900 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1901 | mm_ctx_cleanup_free(mmctx, "forced reattach"); |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1902 | |
Jacob Erlbeck | b1c074f | 2014-10-31 12:27:11 +0100 | [diff] [blame] | 1903 | return rc; |
Jacob Erlbeck | 78ecaf0 | 2014-09-05 14:32:36 +0200 | [diff] [blame] | 1904 | } |
| 1905 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1906 | /* Main entry point for incoming 04.08 GPRS messages */ |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1907 | int gsm0408_gprs_rcvmsg(struct msgb *msg, struct gprs_llc_llme *llme) |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1908 | { |
Harald Welte | 943c5bc | 2010-04-30 16:33:12 +0200 | [diff] [blame] | 1909 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_gmmh(msg); |
Harald Welte | eaa614c | 2010-05-02 11:26:34 +0200 | [diff] [blame] | 1910 | uint8_t pdisc = gh->proto_discr & 0x0f; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1911 | struct sgsn_mm_ctx *mmctx; |
| 1912 | struct gprs_ra_id ra_id; |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1913 | int rc = -EINVAL; |
| 1914 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1915 | bssgp_parse_cell_id(&ra_id, msgb_bcid(msg)); |
| 1916 | mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &ra_id); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1917 | if (mmctx) { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1918 | msgid2mmctx(mmctx, msg); |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1919 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]); |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1920 | mmctx->llme = llme; |
Harald Welte | 8acd88f | 2010-05-18 10:57:45 +0200 | [diff] [blame] | 1921 | } |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 1922 | |
| 1923 | /* MMCTX can be NULL */ |
| 1924 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1925 | switch (pdisc) { |
| 1926 | case GSM48_PDISC_MM_GPRS: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1927 | rc = gsm0408_rcv_gmm(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1928 | break; |
| 1929 | case GSM48_PDISC_SM_GPRS: |
Harald Welte | 807a5d8 | 2010-06-01 11:53:01 +0200 | [diff] [blame] | 1930 | rc = gsm0408_rcv_gsm(mmctx, msg, llme); |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1931 | break; |
| 1932 | default: |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1933 | LOGP(DMM, LOGL_NOTICE, "Unknown GSM 04.08 discriminator 0x%02x\n", |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1934 | pdisc); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 1935 | /* FIXME: return status message */ |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1936 | break; |
| 1937 | } |
| 1938 | |
Jacob Erlbeck | 258ce3d | 2014-09-30 13:51:45 +0200 | [diff] [blame] | 1939 | /* MMCTX can be invalid */ |
| 1940 | |
Harald Welte | 9b455bf | 2010-03-14 15:45:01 +0800 | [diff] [blame] | 1941 | return rc; |
| 1942 | } |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1943 | |
| 1944 | int gprs_gmm_rx_suspend(struct gprs_ra_id *raid, uint32_t tlli) |
| 1945 | { |
| 1946 | struct sgsn_mm_ctx *mmctx; |
| 1947 | |
| 1948 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1949 | if (!mmctx) { |
| 1950 | LOGP(DMM, LOGL_NOTICE, "SUSPEND request for unknown " |
| 1951 | "TLLI=%08x\n", tlli); |
| 1952 | return -EINVAL; |
| 1953 | } |
| 1954 | |
Jacob Erlbeck | 7dba11f | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 1955 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 1956 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1957 | LOGMMCTXP(LOGL_NOTICE, mmctx, "SUSPEND request while state " |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1958 | "!= REGISTERED (TLLI=%08x)\n", tlli); |
| 1959 | return -EINVAL; |
| 1960 | } |
| 1961 | |
| 1962 | /* Transition from REGISTERED_NORMAL to REGISTERED_SUSPENDED */ |
| 1963 | mmctx->mm_state = GMM_REGISTERED_SUSPENDED; |
| 1964 | return 0; |
| 1965 | } |
| 1966 | |
| 1967 | int gprs_gmm_rx_resume(struct gprs_ra_id *raid, uint32_t tlli, |
| 1968 | uint8_t suspend_ref) |
| 1969 | { |
| 1970 | struct sgsn_mm_ctx *mmctx; |
| 1971 | |
| 1972 | /* FIXME: make use of suspend reference? */ |
| 1973 | |
| 1974 | mmctx = sgsn_mm_ctx_by_tlli(tlli, raid); |
| 1975 | if (!mmctx) { |
| 1976 | LOGP(DMM, LOGL_NOTICE, "RESUME request for unknown " |
| 1977 | "TLLI=%08x\n", tlli); |
| 1978 | return -EINVAL; |
| 1979 | } |
| 1980 | |
Jacob Erlbeck | 7dba11f | 2014-12-22 17:58:18 +0100 | [diff] [blame] | 1981 | if (mmctx->mm_state != GMM_REGISTERED_NORMAL && |
| 1982 | mmctx->mm_state != GMM_REGISTERED_SUSPENDED) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 1983 | LOGMMCTXP(LOGL_NOTICE, mmctx, "RESUME request while state " |
Harald Welte | 5bfe499 | 2010-06-09 11:22:47 +0200 | [diff] [blame] | 1984 | "!= SUSPENDED (TLLI=%08x)\n", tlli); |
| 1985 | /* FIXME: should we not simply ignore it? */ |
| 1986 | return -EINVAL; |
| 1987 | } |
| 1988 | |
| 1989 | /* Transition from SUSPENDED to NORMAL */ |
| 1990 | mmctx->mm_state = GMM_REGISTERED_NORMAL; |
| 1991 | return 0; |
| 1992 | } |