Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 1 | #include <osmocom/sgsn/gprs_gmm_attach.h> |
| 2 | |
| 3 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
| 4 | #include <osmocom/sgsn/debug.h> |
| 5 | #include <osmocom/sgsn/gprs_gmm.h> |
| 6 | #include <osmocom/sgsn/sgsn.h> |
| 7 | |
| 8 | #define X(s) (1 << (s)) |
| 9 | |
| 10 | static int require_identity_imei = 1; |
| 11 | static int require_auth = 1; |
| 12 | |
| 13 | static void st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 14 | { |
| 15 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 16 | struct msgb *attach_req = data; |
| 17 | |
| 18 | /* we can run st_init multiple times */ |
| 19 | if (ctx->gmm_att_req.attach_req) |
| 20 | msgb_free(ctx->gmm_att_req.attach_req); |
| 21 | |
| 22 | ctx->gmm_att_req.attach_req = msgb_copy(attach_req, "Attach Request"); |
| 23 | ctx->auth_state = SGSN_AUTH_UNKNOWN; |
| 24 | ctx->gmm_att_req.auth_reattempt = 0; |
| 25 | |
| 26 | /* |
| 27 | * TODO: remove pending_req as soon the sgsn_auth code doesn't depend |
| 28 | * on it. |
| 29 | * pending_req must be set, even this fsm doesn't use it, because |
| 30 | * the sgsn_auth code is using this too |
| 31 | */ |
| 32 | ctx->pending_req = GSM48_MT_GMM_ATTACH_REQ; |
| 33 | |
| 34 | if (require_identity_imei) { |
| 35 | ctx->gmm_att_req.id_type = GSM_MI_TYPE_IMEI; |
| 36 | osmo_fsm_inst_state_chg(fi, ST_IDENTIY, sgsn->cfg.timers.T3370, 3370); |
| 37 | } else if (!strlen(ctx->imsi)) { |
| 38 | ctx->gmm_att_req.id_type = GSM_MI_TYPE_IMSI; |
| 39 | osmo_fsm_inst_state_chg(fi, ST_IDENTIY, sgsn->cfg.timers.T3370, 3370); |
| 40 | } else if (require_auth) |
| 41 | osmo_fsm_inst_state_chg(fi, ST_AUTH, sgsn->cfg.timers.T3360, 3360); |
| 42 | else |
| 43 | osmo_fsm_inst_state_chg(fi, ST_ACCEPT, sgsn->cfg.timers.T3350, 3350); |
| 44 | } |
| 45 | |
| 46 | static void st_identity_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 47 | { |
| 48 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 49 | int ret = 0; |
| 50 | |
| 51 | ctx->num_T_exp = 0; |
| 52 | |
| 53 | switch (ctx->gmm_att_req.id_type) { |
| 54 | case GSM_MI_TYPE_IMEI: |
| 55 | case GSM_MI_TYPE_IMSI: |
| 56 | break; |
| 57 | default: |
| 58 | /* TODO logging */ |
| 59 | osmo_fsm_inst_dispatch(fi, E_REJECT, NULL); |
| 60 | return; |
| 61 | } |
| 62 | |
| 63 | ctx->t3370_id_type = ctx->gmm_att_req.id_type; |
| 64 | ret = gsm48_tx_gmm_id_req(ctx, ctx->gmm_att_req.id_type); |
| 65 | if (ret < 0) { |
| 66 | LOGPFSM(fi, "Can not send tx_gmm_id %d.\n", ret); |
| 67 | osmo_fsm_inst_dispatch(fi, E_REJECT, NULL); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | static void st_identity(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 72 | { |
| 73 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 74 | |
| 75 | OSMO_ASSERT(event == E_IDEN_RESP_RECV); |
| 76 | |
| 77 | /* check if we received a identity response */ |
| 78 | long type = (long) data; |
| 79 | switch (type) { |
| 80 | case GSM_MI_TYPE_IMEI: |
| 81 | case GSM_MI_TYPE_IMSI: |
| 82 | break; |
| 83 | default: |
| 84 | LOGMMCTXP(LOGL_ERROR, ctx, "Unknown mi type: 0x%lx, rejecting MS.\n", type); |
| 85 | osmo_fsm_inst_dispatch(fi, E_REJECT, (void *) GMM_CAUSE_NET_FAIL); |
| 86 | return; |
| 87 | } |
| 88 | |
| 89 | if (type != ctx->gmm_att_req.id_type) { |
| 90 | /* ignore wrong package */ |
| 91 | /* TODO logging */ |
| 92 | return; |
| 93 | } |
| 94 | |
| 95 | if (type == GSM_MI_TYPE_IMEI && !strlen(ctx->imsi)) { |
| 96 | ctx->gmm_att_req.id_type = GSM_MI_TYPE_IMSI; |
| 97 | osmo_fsm_inst_state_chg(fi, ST_IDENTIY, sgsn->cfg.timers.T3370, 3370); |
| 98 | } else if (require_auth) |
| 99 | osmo_fsm_inst_state_chg(fi, ST_AUTH, sgsn->cfg.timers.T3360, 3360); |
| 100 | else |
| 101 | osmo_fsm_inst_state_chg(fi, ST_ACCEPT, sgsn->cfg.timers.T3350, 3350); |
| 102 | } |
| 103 | |
| 104 | static void st_auth_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 105 | { |
| 106 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 107 | enum sgsn_auth_state auth_state; |
| 108 | |
| 109 | ctx->num_T_exp = 0; |
| 110 | |
| 111 | /* TODO: remove this layer violation. Don't parse any auth_policy here |
| 112 | * The correct way would be to ask the SGSN is this mmctx has to be auth |
| 113 | * regardless of the state. |
| 114 | * Otherwise someone else could steal the TLLI and just use it without further |
| 115 | * auth. |
| 116 | */ |
| 117 | if (sgsn->cfg.auth_policy != SGSN_AUTH_POLICY_REMOTE) { |
| 118 | /* we can "trust" sgsn_auth_state as long it's not remote */ |
| 119 | auth_state = sgsn_auth_state(ctx); |
| 120 | } else { |
| 121 | auth_state = ctx->auth_state; |
| 122 | } |
| 123 | |
| 124 | switch(auth_state) { |
| 125 | case SGSN_AUTH_UMTS_RESYNC: /* ask the vlr for a new vector to match the simcards seq */ |
| 126 | case SGSN_AUTH_UNKNOWN: /* the SGSN doesn know this MS */ |
| 127 | osmo_fsm_inst_state_chg(fi, ST_ASK_VLR, sgsn->cfg.timers.T3350, 3350); |
| 128 | break; |
| 129 | case SGSN_AUTH_REJECTED: |
| 130 | /* TODO: correct GMM cause */ |
| 131 | osmo_fsm_inst_dispatch(fi, E_REJECT, (void *) GMM_CAUSE_GPRS_NOTALLOWED); |
| 132 | break; |
| 133 | case SGSN_AUTH_ACCEPTED: |
| 134 | osmo_fsm_inst_state_chg(fi, ST_ACCEPT, sgsn->cfg.timers.T3350, 3350); |
| 135 | break; |
| 136 | case SGSN_AUTH_AUTHENTICATE: |
| 137 | if (ctx->auth_triplet.key_seq == GSM_KEY_SEQ_INVAL) { |
| 138 | /* invalid key material */ |
| 139 | osmo_fsm_inst_state_chg(fi, ST_ASK_VLR, sgsn->cfg.timers.T3350, 3350); |
| 140 | } |
| 141 | |
| 142 | struct gsm_auth_tuple *at = &ctx->auth_triplet; |
| 143 | if (gsm48_tx_gmm_auth_ciph_req(ctx, &at->vec, at->key_seq, |
| 144 | false) < 0) { |
| 145 | /* network failure */ |
| 146 | osmo_fsm_inst_dispatch(fi, E_REJECT, (void *) GMM_CAUSE_NET_FAIL); |
| 147 | } |
| 148 | ctx->gmm_att_req.auth_reattempt++; |
| 149 | break; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | static void st_auth(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 154 | { |
| 155 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 156 | |
| 157 | switch (event) { |
| 158 | case E_AUTH_RESP_RECV_SUCCESS: |
| 159 | sgsn_auth_request(ctx); |
Alexander Couzens | 5455756 | 2018-09-27 21:15:30 +0200 | [diff] [blame] | 160 | #ifdef BUILD_IU |
| 161 | if (ctx->ran_type == MM_CTX_T_UTRAN_Iu && !ctx->iu.ue_ctx->integrity_active) |
| 162 | osmo_fsm_inst_state_chg(fi, ST_IU_SECURITY_CMD, sgsn->cfg.timers.T3350, 3350); |
| 163 | else |
| 164 | #endif /* BUILD_IU */ |
| 165 | osmo_fsm_inst_state_chg(fi, ST_ACCEPT, sgsn->cfg.timers.T3350, 3350); |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 166 | break; |
| 167 | case E_AUTH_RESP_RECV_RESYNC: |
| 168 | if (ctx->gmm_att_req.auth_reattempt <= 1) |
| 169 | osmo_fsm_inst_state_chg(fi, ST_ASK_VLR, sgsn->cfg.timers.T3350, 3350); |
| 170 | else |
| 171 | osmo_fsm_inst_dispatch(fi, E_REJECT, (void *) GMM_CAUSE_SYNC_FAIL); |
| 172 | break; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | static void st_accept_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 177 | { |
| 178 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 179 | |
| 180 | ctx->num_T_exp = 0; |
| 181 | |
| 182 | /* TODO: remove pending_req as soon the sgsn_auth code doesn't depend on it */ |
| 183 | ctx->pending_req = 0; |
| 184 | gsm48_tx_gmm_att_ack(ctx); |
| 185 | } |
| 186 | |
| 187 | static void st_accept(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 188 | { |
| 189 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 190 | |
| 191 | switch(event) { |
| 192 | case E_ATTACH_COMPLETE_RECV: |
| 193 | /* TODO: #ifdef ! PTMSI_ALLOC is not supported */ |
| 194 | extract_subscr_msisdn(ctx); |
| 195 | extract_subscr_hlr(ctx); |
| 196 | osmo_fsm_inst_state_chg(fi, ST_INIT, 0, 0); |
| 197 | break; |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | static void st_reject(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 202 | { |
| 203 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 204 | long reject_cause = (long) data; |
| 205 | |
| 206 | if (reject_cause != GMM_DISCARD_MS_WITHOUT_REJECT) |
| 207 | gsm48_tx_gmm_att_rej(ctx, (uint8_t) reject_cause); |
| 208 | |
| 209 | sgsn_mm_ctx_cleanup_free(ctx); |
| 210 | } |
| 211 | |
| 212 | static void st_ask_vlr_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 213 | { |
| 214 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 215 | |
| 216 | /* FIXME: remove this layer violation. |
| 217 | * The VLR should send the message to the HLR and not the rx function |
| 218 | * gsm48_rx_gmm_auth_ciph_fail. Because gmm_auth_ciph_fail already send a |
| 219 | * message to the HLR, we don't send here a request. */ |
| 220 | if (ctx->auth_state == SGSN_AUTH_UMTS_RESYNC) |
| 221 | return; |
| 222 | |
| 223 | /* ask the auth layer for more data */ |
| 224 | sgsn_auth_request(ctx); |
| 225 | } |
| 226 | |
| 227 | static void st_ask_vlr(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 228 | { |
| 229 | switch(event) { |
| 230 | case E_VLR_ANSWERED: |
| 231 | osmo_fsm_inst_state_chg(fi, ST_AUTH, sgsn->cfg.timers.T3360, 3360); |
| 232 | break; |
| 233 | } |
| 234 | } |
| 235 | |
Alexander Couzens | 5455756 | 2018-09-27 21:15:30 +0200 | [diff] [blame] | 236 | static void st_iu_security_cmd_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 237 | { |
| 238 | #ifdef BUILD_IU |
| 239 | struct sgsn_mm_ctx *ctx = fi->priv; |
Alexander Couzens | 5455756 | 2018-09-27 21:15:30 +0200 | [diff] [blame] | 240 | |
| 241 | /* TODO: shouldn't this set always? not only when the integrity_active? */ |
| 242 | if (ctx->iu.ue_ctx->integrity_active) { |
| 243 | osmo_fsm_inst_state_chg(fi, ST_ACCEPT, sgsn->cfg.timers.T3350, 3350); |
| 244 | return; |
| 245 | } |
| 246 | |
| 247 | ranap_iu_tx_sec_mode_cmd(ctx->iu.ue_ctx, &ctx->auth_triplet.vec, 0, ctx->iu.new_key); |
| 248 | ctx->iu.new_key = 0; |
| 249 | #endif |
| 250 | } |
| 251 | |
| 252 | static void st_iu_security_cmd(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 253 | { |
| 254 | switch(event) { |
| 255 | case E_IU_SECURITY_CMD_COMPLETE: |
| 256 | osmo_fsm_inst_state_chg(fi, ST_ACCEPT, sgsn->cfg.timers.T3350, 3350); |
| 257 | break; |
| 258 | } |
| 259 | } |
| 260 | |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 261 | static struct osmo_fsm_state gmm_attach_req_fsm_states[] = { |
| 262 | /* default state for non-DTX and DTX when SPEECH is in progress */ |
| 263 | [ST_INIT] = { |
| 264 | .in_event_mask = X(E_ATTACH_REQ_RECV), |
| 265 | .out_state_mask = X(ST_INIT) | X(ST_IDENTIY) | X(ST_AUTH) | X(ST_ACCEPT), |
| 266 | .name = "Init", |
| 267 | .action = st_init, |
| 268 | }, |
| 269 | [ST_ASK_VLR] = { |
| 270 | .in_event_mask = X(E_VLR_ANSWERED), |
| 271 | .out_state_mask = X(ST_INIT) | X(ST_AUTH) | X(ST_ACCEPT) | X(ST_REJECT), |
| 272 | .name = "AskVLR", |
| 273 | .onenter = st_ask_vlr_on_enter, |
| 274 | .action = st_ask_vlr, |
| 275 | }, |
| 276 | [ST_IDENTIY] = { |
| 277 | .in_event_mask = X(E_IDEN_RESP_RECV), |
| 278 | .out_state_mask = X(ST_INIT) | X(ST_AUTH) | X(ST_ACCEPT) | X(ST_IDENTIY) | X(ST_REJECT), |
| 279 | .onenter = st_identity_on_enter, |
| 280 | .name = "CheckIdentity", |
| 281 | .action = st_identity, |
| 282 | }, |
| 283 | [ST_AUTH] = { |
| 284 | .in_event_mask = X(E_AUTH_RESP_RECV_SUCCESS) | X(E_AUTH_RESP_RECV_RESYNC), |
Alexander Couzens | 5455756 | 2018-09-27 21:15:30 +0200 | [diff] [blame] | 285 | .out_state_mask = X(ST_INIT) | X(ST_AUTH) | X(ST_IU_SECURITY_CMD) | X(ST_ACCEPT) | X(ST_ASK_VLR) | X(ST_REJECT), |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 286 | .name = "Authenticate", |
| 287 | .onenter = st_auth_on_enter, |
| 288 | .action = st_auth, |
| 289 | }, |
Alexander Couzens | 5455756 | 2018-09-27 21:15:30 +0200 | [diff] [blame] | 290 | [ST_IU_SECURITY_CMD] = { |
| 291 | .in_event_mask = X(E_IU_SECURITY_CMD_COMPLETE), |
| 292 | .out_state_mask = X(ST_INIT) | X(ST_AUTH) | X(ST_ACCEPT) | X(ST_REJECT), |
| 293 | .name = "IuSecurityCommand", |
| 294 | .onenter = st_iu_security_cmd_on_enter, |
| 295 | .action = st_iu_security_cmd, |
| 296 | }, |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 297 | [ST_ACCEPT] = { |
| 298 | .in_event_mask = X(E_ATTACH_COMPLETE_RECV), |
| 299 | .out_state_mask = X(ST_INIT) | X(ST_REJECT), |
| 300 | .name = "WaitAttachComplete", |
| 301 | .onenter = st_accept_on_enter, |
| 302 | .action = st_accept, |
| 303 | }, |
| 304 | [ST_REJECT] = { |
| 305 | .in_event_mask = X(E_REJECT), |
| 306 | .out_state_mask = X(ST_INIT), |
| 307 | .name = "Reject", |
| 308 | .action = st_reject, |
| 309 | }, |
| 310 | }; |
| 311 | |
| 312 | const struct value_string gmm_attach_req_fsm_event_names[] = { |
| 313 | { E_ATTACH_REQ_RECV, "Received an attach request" }, |
| 314 | { E_IDEN_RESP_RECV, "Identity Request received" }, |
| 315 | { E_AUTH_RESP_RECV_SUCCESS, "Authentication Response received" }, |
| 316 | { E_AUTH_RESP_RECV_RESYNC, "Authentication Failure with resync received" }, |
| 317 | { E_ATTACH_ACCEPTED, "Attach accepted" }, |
| 318 | { E_ATTACH_ACCEPT_SENT, "Attach accept sent" }, |
| 319 | { E_ATTACH_COMPLETE_RECV, "Attach complete received." }, |
Alexander Couzens | 5455756 | 2018-09-27 21:15:30 +0200 | [diff] [blame] | 320 | { E_IU_SECURITY_CMD_COMPLETE, "IU Security Command Complete received." }, |
Alexander Couzens | f7198d7 | 2018-05-22 18:29:14 +0200 | [diff] [blame] | 321 | { E_REJECT, "Reject the MS"}, |
| 322 | { E_VLR_ANSWERED, "VLR answered"}, |
| 323 | { 0, NULL } |
| 324 | }; |
| 325 | |
| 326 | void gmm_attach_allstate_action(struct osmo_fsm_inst *fi, uint32_t event, void *data) { |
| 327 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 328 | struct msgb *new_attach_req = data; |
| 329 | |
| 330 | switch (event) { |
| 331 | case E_ATTACH_REQ_RECV: |
| 332 | switch (fi->state) { |
| 333 | case ST_INIT: |
| 334 | case ST_REJECT: |
| 335 | st_init(fi, event, data); |
| 336 | break; |
| 337 | |
| 338 | case ST_ACCEPT: |
| 339 | /* TODO: drop all state (e.g. PDP Ctx) and do this procedure */ |
| 340 | osmo_fsm_inst_state_chg(fi, ST_INIT, 0, 0); |
| 341 | st_init(fi, event, data); |
| 342 | break; |
| 343 | |
| 344 | case ST_ASK_VLR: |
| 345 | case ST_AUTH: |
| 346 | case ST_IDENTIY: |
| 347 | case ST_RETRIEVE_AUTH: |
| 348 | /* 04.08 4.7.3.1.6 d) Abnormal Case |
| 349 | * Only do action if Req IEs differs. */ |
| 350 | if (ctx->gmm_att_req.attach_req && |
| 351 | gprs_gmm_attach_req_ies(new_attach_req, ctx->gmm_att_req.attach_req)) { |
| 352 | osmo_fsm_inst_state_chg(fi, ST_INIT, 0, 0); |
| 353 | st_init(fi, event, data); |
| 354 | } |
| 355 | break; |
| 356 | } |
| 357 | break; |
| 358 | case E_REJECT: |
| 359 | if (fi->state != ST_REJECT) |
| 360 | osmo_fsm_inst_state_chg(fi, ST_REJECT, 0, 0); |
| 361 | st_reject(fi, event, data); |
| 362 | break; |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | int gmm_attach_timer_cb(struct osmo_fsm_inst *fi) |
| 367 | { |
| 368 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 369 | struct gsm_auth_tuple *at = &ctx->auth_triplet; |
| 370 | |
| 371 | ctx->num_T_exp++; |
| 372 | |
| 373 | switch(fi->state) { |
| 374 | case ST_ASK_VLR: |
| 375 | /* TODO: replace T3350 by a better timer or it's own |
| 376 | * re-use T3350 - not defined by standard */ |
| 377 | LOGMMCTXP(LOGL_ERROR, ctx, "HLR did not answer in time. Rejecting.\n"); |
| 378 | osmo_fsm_inst_dispatch(fi, E_REJECT, |
| 379 | (void *) GMM_CAUSE_NET_FAIL); |
| 380 | break; |
| 381 | case ST_IDENTIY: |
| 382 | /* T3370 */ |
| 383 | if (ctx->num_T_exp >= 5) { |
| 384 | osmo_fsm_inst_dispatch(fi, E_REJECT, |
| 385 | (void *) GMM_CAUSE_MS_ID_NOT_DERIVED); |
| 386 | break; |
| 387 | } |
| 388 | gsm48_tx_gmm_id_req(ctx, ctx->gmm_att_req.id_type); |
| 389 | osmo_timer_schedule(&fi->timer, sgsn->cfg.timers.T3370, 0); |
| 390 | break; |
| 391 | case ST_AUTH: |
| 392 | /* T3360 */ |
| 393 | if (ctx->num_T_exp >= 5) { |
| 394 | osmo_fsm_inst_dispatch(fi, E_REJECT, (void *) GMM_DISCARD_MS_WITHOUT_REJECT); |
| 395 | break; |
| 396 | } |
| 397 | gsm48_tx_gmm_auth_ciph_req(ctx, &at->vec, at->key_seq, false); |
| 398 | osmo_timer_schedule(&fi->timer, sgsn->cfg.timers.T3360, 0); |
| 399 | break; |
| 400 | case ST_ACCEPT: |
| 401 | /* T3350 */ |
| 402 | if (ctx->num_T_exp >= 5) { |
| 403 | osmo_fsm_inst_dispatch(fi, E_REJECT, (void *) GMM_DISCARD_MS_WITHOUT_REJECT); |
| 404 | break; |
| 405 | } |
| 406 | gsm48_tx_gmm_att_ack(ctx); |
| 407 | osmo_timer_schedule(&fi->timer, sgsn->cfg.timers.T3350, 0); |
| 408 | break; |
| 409 | } |
| 410 | |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | struct osmo_fsm gmm_attach_req_fsm = { |
| 415 | .name = "GMM_ATTACH_REQ_FSM", |
| 416 | .states = gmm_attach_req_fsm_states, |
| 417 | .num_states = ARRAY_SIZE(gmm_attach_req_fsm_states), |
| 418 | .event_names = gmm_attach_req_fsm_event_names, |
| 419 | .allstate_event_mask = X(E_REJECT) | X(E_ATTACH_REQ_RECV), |
| 420 | .allstate_action = gmm_attach_allstate_action, |
| 421 | .log_subsys = DMM, |
| 422 | .timer_cb = gmm_attach_timer_cb, |
| 423 | }; |
| 424 | |
| 425 | static __attribute__((constructor)) void gprs_gmm_fsm_init(void) |
| 426 | { |
| 427 | osmo_fsm_register(&gmm_attach_req_fsm); |
| 428 | } |
| 429 | |
| 430 | void gmm_att_req_free(struct sgsn_mm_ctx *mm) { |
| 431 | if (mm->gmm_att_req.fsm) |
| 432 | osmo_fsm_inst_free(mm->gmm_att_req.fsm); |
| 433 | |
| 434 | if (mm->gmm_att_req.attach_req) |
| 435 | msgb_free(mm->gmm_att_req.attach_req); |
| 436 | } |