Andreas Eversberg | c1a91a8 | 2011-10-28 11:05:37 +0200 | [diff] [blame] | 1 | /* Point-to-Point (PP) Short Message Service (SMS) |
| 2 | * Support on Mobile Radio Interface |
| 3 | * 3GPP TS 04.11 version 7.1.0 Release 1998 / ETSI TS 100 942 V7.1.0 */ |
| 4 | |
| 5 | /* (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de> |
| 6 | * (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| 7 | * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 8 | * (C) 2010 by On-Waves |
| 9 | * (C) 2011 by Andreas Eversberg <jolly@eversberg.eu> |
| 10 | * |
| 11 | * All Rights Reserved |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU Affero General Public License as published by |
| 15 | * the Free Software Foundation; either version 3 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU Affero General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU Affero General Public License |
| 24 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | /* Notes on msg: |
| 29 | * |
| 30 | * Messages from lower layer are freed by lower layer. |
| 31 | * |
| 32 | * Messages to upper layer are freed after upper layer call returns, so upper |
| 33 | * layer cannot use data after returning. Upper layer must not free the msg. |
| 34 | * |
| 35 | * This implies: Lower layer messages can be forwarded to upper layer. |
| 36 | * |
| 37 | * Upper layer messages are freed by lower layer, so they must not be freed |
| 38 | * after calling lower layer. |
| 39 | * |
| 40 | * |
| 41 | * Notes on release: |
| 42 | * |
| 43 | * Sending Abort/Release (MNSMS-ABORT-REQ or MNSMS-REL-REQ) may cause the |
| 44 | * lower layer to become IDLE. Then it is allowed to destroy this instance, |
| 45 | * so sending this this MUST be the last thing that is done. |
| 46 | * |
| 47 | */ |
| 48 | |
| 49 | |
| 50 | #include <string.h> |
| 51 | #include <errno.h> |
| 52 | #include <osmocom/core/msgb.h> |
| 53 | #include <osmocom/core/logging.h> |
| 54 | #include <osmocom/core/timer.h> |
| 55 | #include <osmocom/gsm/tlv.h> |
| 56 | |
| 57 | #include <osmocom/gsm/gsm0411_utils.h> |
| 58 | #include <osmocom/gsm/gsm0411_smc.h> |
| 59 | #include <osmocom/gsm/gsm0411_smr.h> |
| 60 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
| 61 | |
| 62 | static void rp_timer_expired(void *data); |
| 63 | |
| 64 | /* init a new instance */ |
| 65 | void gsm411_smr_init(struct gsm411_smr_inst *inst, int network, |
| 66 | int (*rl_recv) (struct gsm411_smr_inst *inst, int msg_type, |
| 67 | struct msgb *msg), |
| 68 | int (*mn_send) (struct gsm411_smr_inst *inst, int msg_type, |
| 69 | struct msgb *msg)) |
| 70 | { |
| 71 | memset(inst, 0, sizeof(*inst)); |
| 72 | inst->network = network; |
| 73 | inst->rp_state = GSM411_RPS_IDLE; |
| 74 | inst->rl_recv = rl_recv; |
| 75 | inst->mn_send = mn_send; |
| 76 | inst->rp_timer.data = inst; |
| 77 | inst->rp_timer.cb = rp_timer_expired; |
| 78 | |
| 79 | LOGP(DLSMS, LOGL_INFO, "New SMR instance created\n"); |
| 80 | } |
| 81 | |
| 82 | /* clear instance */ |
| 83 | void gsm411_smr_clear(struct gsm411_smr_inst *inst) |
| 84 | { |
| 85 | LOGP(DLSMS, LOGL_INFO, "Clear SMR instance\n"); |
| 86 | |
| 87 | osmo_timer_del(&inst->rp_timer); |
| 88 | } |
| 89 | |
| 90 | const char *smr_state_names[] = { |
| 91 | "IDLE", |
| 92 | "WAIT_FOR_RP_ACK", |
| 93 | "illegal state 2" |
| 94 | "WAIT_TO_TX_RP_ACK", |
| 95 | "WAIT_FOR_RETRANS_T", |
| 96 | }; |
| 97 | |
| 98 | const struct value_string gsm411_rp_cause_strs[] = { |
| 99 | { GSM411_RP_CAUSE_MO_NUM_UNASSIGNED, "(MO) Number not assigned" }, |
| 100 | { GSM411_RP_CAUSE_MO_OP_DET_BARR, "(MO) Operator determined barring" }, |
| 101 | { GSM411_RP_CAUSE_MO_CALL_BARRED, "(MO) Call barred" }, |
| 102 | { GSM411_RP_CAUSE_MO_SMS_REJECTED, "(MO) SMS rejected" }, |
| 103 | { GSM411_RP_CAUSE_MO_DEST_OUT_OF_ORDER, "(MO) Destination out of order" }, |
| 104 | { GSM411_RP_CAUSE_MO_UNIDENTIFIED_SUBSCR, "(MO) Unidentified subscriber" }, |
| 105 | { GSM411_RP_CAUSE_MO_FACILITY_REJ, "(MO) Facility reject" }, |
| 106 | { GSM411_RP_CAUSE_MO_UNKNOWN_SUBSCR, "(MO) Unknown subscriber" }, |
| 107 | { GSM411_RP_CAUSE_MO_NET_OUT_OF_ORDER, "(MO) Network out of order" }, |
| 108 | { GSM411_RP_CAUSE_MO_TEMP_FAIL, "(MO) Temporary failure" }, |
| 109 | { GSM411_RP_CAUSE_MO_CONGESTION, "(MO) Congestion" }, |
| 110 | { GSM411_RP_CAUSE_MO_RES_UNAVAIL, "(MO) Resource unavailable" }, |
| 111 | { GSM411_RP_CAUSE_MO_REQ_FAC_NOTSUBSCR, "(MO) Requested facility not subscribed" }, |
| 112 | { GSM411_RP_CAUSE_MO_REQ_FAC_NOTIMPL, "(MO) Requested facility not implemented" }, |
| 113 | { GSM411_RP_CAUSE_MO_INTERWORKING, "(MO) Interworking" }, |
| 114 | /* valid only for MT */ |
| 115 | { GSM411_RP_CAUSE_MT_MEM_EXCEEDED, "(MT) Memory Exceeded" }, |
| 116 | /* valid for both directions */ |
| 117 | { GSM411_RP_CAUSE_INV_TRANS_REF, "Invalid Transaction Reference" }, |
| 118 | { GSM411_RP_CAUSE_SEMANT_INC_MSG, "Semantically Incorrect Message" }, |
| 119 | { GSM411_RP_CAUSE_INV_MAND_INF, "Invalid Mandatory Information" }, |
| 120 | { GSM411_RP_CAUSE_MSGTYPE_NOTEXIST, "Message Type non-existant" }, |
| 121 | { GSM411_RP_CAUSE_MSG_INCOMP_STATE, "Message incompatible with protocol state" }, |
| 122 | { GSM411_RP_CAUSE_IE_NOTEXIST, "Information Element not existing" }, |
| 123 | { GSM411_RP_CAUSE_PROTOCOL_ERR, "Protocol Error" }, |
| 124 | { 0, NULL } |
| 125 | }; |
| 126 | |
| 127 | static void new_rp_state(struct gsm411_smr_inst *inst, |
| 128 | enum gsm411_rp_state state) |
| 129 | { |
| 130 | LOGP(DLSMS, LOGL_INFO, "New RP state %s -> %s\n", |
| 131 | smr_state_names[inst->rp_state], smr_state_names[state]); |
| 132 | inst->rp_state = state; |
| 133 | |
| 134 | /* stop timer when going idle */ |
| 135 | if (state == GSM411_RPS_IDLE) |
| 136 | osmo_timer_del(&inst->rp_timer); |
| 137 | } |
| 138 | |
| 139 | /* Prefix msg with a RP-DATA header and send as CP-DATA */ |
| 140 | static int gsm411_rp_sendmsg(struct gsm411_smr_inst *inst, struct msgb *msg, |
| 141 | uint8_t rp_msg_type, uint8_t rp_msg_ref, |
| 142 | int mnsms_msg_type) |
| 143 | { |
| 144 | struct gsm411_rp_hdr *rp; |
| 145 | uint8_t len = msg->len; |
| 146 | |
| 147 | /* GSM 04.11 RP-DATA header */ |
| 148 | rp = (struct gsm411_rp_hdr *)msgb_push(msg, sizeof(*rp)); |
| 149 | rp->len = len + 2; |
| 150 | rp->msg_type = rp_msg_type; |
| 151 | rp->msg_ref = rp_msg_ref; /* FIXME: Choose randomly */ |
| 152 | |
| 153 | return inst->mn_send(inst, mnsms_msg_type, msg); |
| 154 | } |
| 155 | |
| 156 | static int gsm411_send_rp_error(struct gsm411_smr_inst *inst, |
| 157 | uint8_t msg_ref, uint8_t cause) |
| 158 | { |
| 159 | struct msgb *msg = gsm411_msgb_alloc(); |
| 160 | |
| 161 | msgb_tv_put(msg, 1, cause); |
| 162 | |
| 163 | LOGP(DLSMS, LOGL_NOTICE, "TX: SMS RP ERROR, cause %d (%s)\n", cause, |
| 164 | get_value_string(gsm411_rp_cause_strs, cause)); |
| 165 | |
| 166 | return gsm411_rp_sendmsg(inst, msg, |
| 167 | (inst->network) ? GSM411_MT_RP_ERROR_MT : GSM411_MT_RP_ERROR_MO, |
| 168 | msg_ref, GSM411_MNSMS_DATA_REQ); |
| 169 | } |
| 170 | |
| 171 | static int gsm411_send_release(struct gsm411_smr_inst *inst) |
| 172 | { |
| 173 | struct msgb *msg = gsm411_msgb_alloc(); |
| 174 | |
| 175 | LOGP(DLSMS, LOGL_NOTICE, "TX: MNSMS-REL-REQ\n"); |
| 176 | |
| 177 | return inst->mn_send(inst, GSM411_MNSMS_REL_REQ, msg); |
| 178 | } |
| 179 | |
| 180 | static int gsm411_send_abort(struct gsm411_smr_inst *inst) |
| 181 | { |
| 182 | struct msgb *msg = gsm411_msgb_alloc(); |
| 183 | |
| 184 | msgb_tv_put(msg, 1, 111); //FIXME: better idea ? */ |
| 185 | LOGP(DLSMS, LOGL_NOTICE, "TX: MNSMS-ABORT-REQ\n"); |
| 186 | |
| 187 | return inst->mn_send(inst, GSM411_MNSMS_ABORT_REQ, msg); |
| 188 | } |
| 189 | |
| 190 | static int gsm411_send_report(struct gsm411_smr_inst *inst) |
| 191 | { |
| 192 | struct msgb *msg = gsm411_msgb_alloc(); |
| 193 | |
| 194 | LOGP(DLSMS, LOGL_NOTICE, "send empty SM_RL_REPORT_IND\n"); |
| 195 | |
| 196 | return inst->rl_recv(inst, GSM411_SM_RL_REPORT_IND, msg); |
| 197 | } |
| 198 | |
| 199 | static int gsm411_rl_data_req(struct gsm411_smr_inst *inst, struct msgb *msg) |
| 200 | { |
| 201 | LOGP(DLSMS, LOGL_DEBUG, "TX SMS RP-DATA\n"); |
| 202 | /* start TR1N and enter 'wait for RP-ACK state' */ |
| 203 | osmo_timer_schedule(&inst->rp_timer, GSM411_TMR_TR1M); |
| 204 | new_rp_state(inst, GSM411_RPS_WAIT_FOR_RP_ACK); |
| 205 | |
| 206 | return inst->mn_send(inst, GSM411_MNSMS_EST_REQ, msg); |
| 207 | } |
| 208 | |
| 209 | static int gsm411_rl_report_req(struct gsm411_smr_inst *inst, struct msgb *msg) |
| 210 | { |
| 211 | LOGP(DLSMS, LOGL_DEBUG, "TX SMS REPORT\n"); |
| 212 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 213 | |
| 214 | inst->mn_send(inst, GSM411_MNSMS_DATA_REQ, msg); |
| 215 | gsm411_send_release(inst); |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | static int gsm411_mnsms_est_ind(struct gsm411_smr_inst *inst, struct msgb *msg) |
| 220 | { |
| 221 | struct gsm48_hdr *gh = (struct gsm48_hdr*)msg->l3h; |
| 222 | struct gsm411_rp_hdr *rp_data = (struct gsm411_rp_hdr*)&gh->data; |
| 223 | uint8_t msg_type = rp_data->msg_type & 0x07; |
| 224 | int rc; |
| 225 | |
| 226 | /* check direction */ |
| 227 | if (inst->network == (msg_type & 1)) { |
| 228 | LOGP(DLSMS, LOGL_NOTICE, "Invalid RP type 0x%02x\n", msg_type); |
| 229 | gsm411_send_rp_error(inst, rp_data->msg_ref, |
| 230 | GSM411_RP_CAUSE_MSG_INCOMP_STATE); |
| 231 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 232 | gsm411_send_release(inst); |
| 233 | return -EINVAL; |
| 234 | } |
| 235 | |
| 236 | switch (msg_type) { |
| 237 | case GSM411_MT_RP_DATA_MT: |
| 238 | case GSM411_MT_RP_DATA_MO: |
| 239 | LOGP(DLSMS, LOGL_DEBUG, "RX SMS RP-DATA\n"); |
| 240 | /* start TR2N and enter 'wait to send RP-ACK state' */ |
| 241 | osmo_timer_schedule(&inst->rp_timer, GSM411_TMR_TR2M); |
| 242 | new_rp_state(inst, GSM411_RPS_WAIT_TO_TX_RP_ACK); |
| 243 | rc = inst->rl_recv(inst, GSM411_SM_RL_DATA_IND, msg); |
| 244 | break; |
| 245 | case GSM411_MT_RP_SMMA_MO: |
| 246 | LOGP(DLSMS, LOGL_DEBUG, "RX SMS RP-SMMA\n"); |
| 247 | /* start TR2N and enter 'wait to send RP-ACK state' */ |
| 248 | osmo_timer_schedule(&inst->rp_timer, GSM411_TMR_TR2M); |
| 249 | new_rp_state(inst, GSM411_RPS_WAIT_TO_TX_RP_ACK); |
| 250 | rc = inst->rl_recv(inst, GSM411_SM_RL_DATA_IND, msg); |
| 251 | break; |
| 252 | default: |
| 253 | LOGP(DLSMS, LOGL_NOTICE, "Invalid RP type 0x%02x\n", msg_type); |
| 254 | gsm411_send_rp_error(inst, rp_data->msg_ref, |
| 255 | GSM411_RP_CAUSE_MSGTYPE_NOTEXIST); |
| 256 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 257 | rc = -EINVAL; |
| 258 | break; |
| 259 | } |
| 260 | |
| 261 | return rc; |
| 262 | } |
| 263 | |
| 264 | static int gsm411_mnsms_data_ind_tx(struct gsm411_smr_inst *inst, |
| 265 | struct msgb *msg) |
| 266 | { |
| 267 | struct gsm48_hdr *gh = (struct gsm48_hdr*)msg->l3h; |
| 268 | struct gsm411_rp_hdr *rp_data = (struct gsm411_rp_hdr*)&gh->data; |
| 269 | uint8_t msg_type = rp_data->msg_type & 0x07; |
| 270 | int rc; |
| 271 | |
| 272 | /* check direction */ |
| 273 | if (inst->network == (msg_type & 1)) { |
| 274 | LOGP(DLSMS, LOGL_NOTICE, "Invalid RP type 0x%02x\n", msg_type); |
| 275 | gsm411_send_rp_error(inst, rp_data->msg_ref, |
| 276 | GSM411_RP_CAUSE_MSG_INCOMP_STATE); |
| 277 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 278 | gsm411_send_release(inst); |
| 279 | return -EINVAL; |
| 280 | } |
| 281 | |
| 282 | switch (msg_type) { |
| 283 | case GSM411_MT_RP_ACK_MO: |
| 284 | case GSM411_MT_RP_ACK_MT: |
| 285 | LOGP(DLSMS, LOGL_DEBUG, "RX SMS RP-ACK\n"); |
| 286 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 287 | inst->rl_recv(inst, GSM411_SM_RL_REPORT_IND, msg); |
| 288 | gsm411_send_release(inst); |
| 289 | return 0; |
| 290 | case GSM411_MT_RP_ERROR_MO: |
| 291 | case GSM411_MT_RP_ERROR_MT: |
| 292 | LOGP(DLSMS, LOGL_DEBUG, "RX SMS RP-ERROR\n"); |
| 293 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 294 | inst->rl_recv(inst, GSM411_SM_RL_REPORT_IND, msg); |
| 295 | gsm411_send_release(inst); |
| 296 | return 0; |
| 297 | default: |
| 298 | LOGP(DLSMS, LOGL_NOTICE, "Invalid RP type 0x%02x\n", msg_type); |
| 299 | gsm411_send_rp_error(inst, rp_data->msg_ref, |
| 300 | GSM411_RP_CAUSE_MSGTYPE_NOTEXIST); |
| 301 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 302 | gsm411_send_release(inst); |
| 303 | return -EINVAL; |
| 304 | } |
| 305 | |
| 306 | return rc; |
| 307 | } |
| 308 | |
| 309 | static int gsm411_mnsms_error_ind_tx(struct gsm411_smr_inst *inst, |
| 310 | struct msgb *msg) |
| 311 | { |
| 312 | LOGP(DLSMS, LOGL_DEBUG, "RX SMS MNSMS-ERROR-IND\n"); |
| 313 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 314 | inst->rl_recv(inst, GSM411_SM_RL_REPORT_IND, msg); |
| 315 | gsm411_send_release(inst); |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | static int gsm411_mnsms_error_ind_rx(struct gsm411_smr_inst *inst, |
| 320 | struct msgb *msg) |
| 321 | { |
| 322 | LOGP(DLSMS, LOGL_DEBUG, "RX SMS MNSMS-ERROR-IND\n"); |
| 323 | new_rp_state(inst, GSM411_RPS_IDLE); |
| 324 | return inst->rl_recv(inst, GSM411_SM_RL_REPORT_IND, msg); |
| 325 | } |
| 326 | |
| 327 | /* SMR TR1* is expired */ |
| 328 | static void rp_timer_expired(void *data) |
| 329 | { |
| 330 | struct gsm411_smr_inst *inst = data; |
| 331 | |
| 332 | if (inst->rp_state == GSM411_RPS_WAIT_TO_TX_RP_ACK) |
| 333 | LOGP(DLSMS, LOGL_DEBUG, "TR2N\n"); |
| 334 | else |
| 335 | LOGP(DLSMS, LOGL_DEBUG, "TR1N\n"); |
| 336 | gsm411_send_report(inst); |
| 337 | gsm411_send_abort(inst); |
| 338 | } |
| 339 | |
| 340 | /* statefull handling for SM-RL SAP messages */ |
| 341 | static struct smrdownstate { |
| 342 | uint32_t states; |
| 343 | int type; |
| 344 | const char *name; |
| 345 | int (*rout) (struct gsm411_smr_inst *inst, |
| 346 | struct msgb *msg); |
| 347 | } smrdownstatelist[] = { |
| 348 | /* data request */ |
| 349 | {SBIT(GSM411_RPS_IDLE), |
| 350 | GSM411_SM_RL_DATA_REQ, |
| 351 | "SM-RL-DATA_REQ", gsm411_rl_data_req}, |
| 352 | |
| 353 | /* report request */ |
| 354 | {SBIT(GSM411_RPS_WAIT_TO_TX_RP_ACK), |
| 355 | GSM411_SM_RL_REPORT_REQ, |
| 356 | "SM-RL-REPORT_REQ", gsm411_rl_report_req}, |
| 357 | }; |
| 358 | |
| 359 | #define SMRDOWNSLLEN \ |
| 360 | (sizeof(smrdownstatelist) / sizeof(struct smrdownstate)) |
| 361 | |
| 362 | /* message from upper layer */ |
| 363 | int gsm411_smr_send(struct gsm411_smr_inst *inst, int msg_type, |
| 364 | struct msgb *msg) |
| 365 | { |
| 366 | int i, rc; |
| 367 | |
| 368 | /* find function for current state and message */ |
| 369 | for (i = 0; i < SMRDOWNSLLEN; i++) { |
| 370 | if ((msg_type == smrdownstatelist[i].type) |
| 371 | && (SBIT(inst->rp_state) & smrdownstatelist[i].states)) |
| 372 | break; |
| 373 | } |
| 374 | if (i == SMRDOWNSLLEN) { |
| 375 | LOGP(DLSMS, LOGL_NOTICE, "Message %u unhandled at this state " |
| 376 | "%s.\n", msg_type, smr_state_names[inst->rp_state]); |
| 377 | msgb_free(msg); |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | LOGP(DLSMS, LOGL_INFO, "Message %s received in state %s\n", |
| 382 | smrdownstatelist[i].name, smr_state_names[inst->rp_state]); |
| 383 | |
| 384 | rc = smrdownstatelist[i].rout(inst, msg); |
| 385 | |
| 386 | return rc; |
| 387 | } |
| 388 | |
| 389 | /* statefull handling for MMSMS SAP messages */ |
| 390 | static struct smrdatastate { |
| 391 | uint32_t states; |
| 392 | int type; |
| 393 | const char *name; |
| 394 | int (*rout) (struct gsm411_smr_inst *inst, |
| 395 | struct msgb *msg); |
| 396 | } smrdatastatelist[] = { |
| 397 | /* establish indication */ |
| 398 | {SBIT(GSM411_RPS_IDLE), |
| 399 | GSM411_MNSMS_EST_IND, |
| 400 | "MNSMS-EST-IND", gsm411_mnsms_est_ind}, |
| 401 | |
| 402 | /* data indication */ |
| 403 | {SBIT(GSM411_RPS_WAIT_FOR_RP_ACK), |
| 404 | GSM411_MNSMS_DATA_IND, |
| 405 | "MNSMS-DATA-IND", gsm411_mnsms_data_ind_tx}, |
| 406 | |
| 407 | /* error indication */ |
| 408 | {SBIT(GSM411_RPS_WAIT_FOR_RP_ACK), |
| 409 | GSM411_MNSMS_ERROR_IND, |
| 410 | "MNSMS-ERROR-IND", gsm411_mnsms_error_ind_tx}, |
| 411 | |
| 412 | /* error indication */ |
| 413 | {SBIT(GSM411_RPS_WAIT_TO_TX_RP_ACK), |
| 414 | GSM411_MNSMS_ERROR_IND, |
| 415 | "MNSMS-ERROR-IND", gsm411_mnsms_error_ind_rx}, |
| 416 | |
| 417 | }; |
| 418 | |
| 419 | #define SMRDATASLLEN \ |
| 420 | (sizeof(smrdatastatelist) / sizeof(struct smrdatastate)) |
| 421 | |
| 422 | /* message from lower layer |
| 423 | * WARNING: We must not free msg, since it will be performed by the |
| 424 | * lower layer. */ |
| 425 | int gsm411_smr_recv(struct gsm411_smr_inst *inst, int msg_type, |
| 426 | struct msgb *msg) |
| 427 | { |
| 428 | int i, rc; |
| 429 | |
| 430 | /* find function for current state and message */ |
| 431 | for (i = 0; i < SMRDATASLLEN; i++) { |
| 432 | /* state must machtch, MM message must match |
| 433 | * CP msg must match only in case of MMSMS_DATA_IND |
| 434 | */ |
| 435 | if ((msg_type == smrdatastatelist[i].type) |
| 436 | && (SBIT(inst->rp_state) & smrdatastatelist[i].states)) |
| 437 | break; |
| 438 | } |
| 439 | if (i == SMRDATASLLEN) { |
| 440 | LOGP(DLSMS, LOGL_NOTICE, "Message %u unhandled at this state " |
| 441 | "%s.\n", msg_type, smr_state_names[inst->rp_state]); |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | LOGP(DLSMS, LOGL_INFO, "Message %s received in state %s\n", |
| 446 | smrdatastatelist[i].name, smr_state_names[inst->rp_state]); |
| 447 | |
| 448 | rc = smrdatastatelist[i].rout(inst, msg); |
| 449 | |
| 450 | return rc; |
| 451 | } |