Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 1 | /* Common parts of IuCS and IuPS interfaces implementation */ |
| 2 | |
| 3 | /* (C) 2016-2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU Affero General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <stdint.h> |
| 22 | #include <unistd.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #include <stdbool.h> |
| 27 | |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 28 | #include <asn1c/asn1helpers.h> |
| 29 | |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 30 | #include <osmocom/ranap/iu_client.h> |
| 31 | |
| 32 | #include <osmocom/core/logging.h> |
| 33 | #include <osmocom/crypt/auth.h> |
| 34 | #include <osmocom/gprs/gprs_msgb.h> |
| 35 | #include <osmocom/sigtran/sccp_sap.h> |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 36 | #include <osmocom/sigtran/sccp_helpers.h> |
| 37 | #include <osmocom/ranap/ranap_common_cn.h> |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 38 | #include <osmocom/ranap/ranap_ies_defs.h> |
| 39 | #include <osmocom/ranap/ranap_msg_factory.h> |
| 40 | |
| 41 | /* Parsed global RNC id. See also struct RANAP_GlobalRNC_ID, and note that the |
| 42 | * PLMN identity is a BCD representation of the MCC and MNC. |
| 43 | * See iu_grnc_id_parse(). */ |
| 44 | struct iu_grnc_id { |
| 45 | uint16_t mcc; |
| 46 | uint16_t mnc; |
| 47 | uint16_t rnc_id; |
| 48 | }; |
| 49 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 50 | struct iu_lac_rac_entry { |
| 51 | struct llist_head entry; |
| 52 | |
| 53 | /* LAC: Location Area Code (for CS and PS) */ |
| 54 | uint16_t lac; |
| 55 | /* RAC: Routing Area Code (for PS only) */ |
| 56 | uint8_t rac; |
| 57 | }; |
| 58 | |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 59 | /* A remote RNC (Radio Network Controller, like BSC but for UMTS) that has |
| 60 | * called us and is currently reachable at the given osmo_sccp_addr. So, when we |
| 61 | * know a LAC for a subscriber, we can page it at the RNC matching that LAC or |
| 62 | * RAC. An HNB-GW typically presents itself as if it were a single RNC, even |
| 63 | * though it may have several RNCs in hNodeBs connected to it. Those will then |
| 64 | * share the same RNC id, which they actually receive and adopt from the HNB-GW |
| 65 | * in the HNBAP HNB REGISTER ACCEPT message. */ |
| 66 | struct ranap_iu_rnc { |
| 67 | struct llist_head entry; |
| 68 | |
| 69 | uint16_t rnc_id; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 70 | struct osmo_sccp_addr sccp_addr; |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 71 | |
| 72 | /* A list of struct iu_lac_rac_entry */ |
| 73 | struct llist_head lac_rac_list; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 74 | }; |
| 75 | |
| 76 | void *talloc_iu_ctx; |
| 77 | void *talloc_asn1_ctx; |
| 78 | |
| 79 | /* Implement the extern asn_debug from libasn1c to indicate whether to print |
| 80 | * asn.1 debug messages (see libasn1c). */ |
| 81 | int asn_debug = 0; |
| 82 | |
| 83 | /* Implement the extern asn1_xer_print to indicate whether the ASN.1 binary |
| 84 | * code decoded and encoded during Iu communication should be logged to stderr |
| 85 | * (see asn.1 generated code in osmo-iuh). */ |
| 86 | int asn1_xer_print = 0; |
| 87 | |
| 88 | ranap_iu_recv_cb_t global_iu_recv_cb = NULL; |
| 89 | ranap_iu_event_cb_t global_iu_event_cb = NULL; |
| 90 | int iu_log_subsystem = 0; |
| 91 | |
| 92 | #define LOGPIU(level, fmt, args...) \ |
| 93 | LOGP(iu_log_subsystem, level, fmt, ## args) |
| 94 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 95 | #define LOGPIUC(level, fmt, args...) \ |
| 96 | LOGPC(iu_log_subsystem, level, fmt, ## args) |
| 97 | |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 98 | static LLIST_HEAD(ue_conn_ctx_list); |
| 99 | static LLIST_HEAD(rnc_list); |
| 100 | |
| 101 | static struct osmo_sccp_instance *g_sccp; |
| 102 | static struct osmo_sccp_user *g_scu; |
Neels Hofmeyr | 1aef9a6 | 2017-08-12 18:02:44 +0200 | [diff] [blame] | 103 | static struct osmo_sccp_addr g_local_sccp_addr; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 104 | |
| 105 | const struct value_string ranap_iu_event_type_names[] = { |
| 106 | OSMO_VALUE_STRING(RANAP_IU_EVENT_RAB_ASSIGN), |
| 107 | OSMO_VALUE_STRING(RANAP_IU_EVENT_SECURITY_MODE_COMPLETE), |
| 108 | OSMO_VALUE_STRING(RANAP_IU_EVENT_IU_RELEASE), |
| 109 | OSMO_VALUE_STRING(RANAP_IU_EVENT_LINK_INVALIDATED), |
| 110 | { 0, NULL } |
| 111 | }; |
| 112 | |
| 113 | static struct ranap_ue_conn_ctx *ue_conn_ctx_alloc(struct ranap_iu_rnc *rnc, uint32_t conn_id) |
| 114 | { |
| 115 | struct ranap_ue_conn_ctx *ctx = talloc_zero(talloc_iu_ctx, struct ranap_ue_conn_ctx); |
| 116 | |
| 117 | ctx->rnc = rnc; |
| 118 | ctx->conn_id = conn_id; |
| 119 | llist_add(&ctx->list, &ue_conn_ctx_list); |
| 120 | |
| 121 | return ctx; |
| 122 | } |
| 123 | |
| 124 | static struct ranap_ue_conn_ctx *ue_conn_ctx_find(uint32_t conn_id) |
| 125 | { |
| 126 | struct ranap_ue_conn_ctx *ctx; |
| 127 | |
| 128 | llist_for_each_entry(ctx, &ue_conn_ctx_list, list) { |
| 129 | if (ctx->conn_id == conn_id) |
| 130 | return ctx; |
| 131 | } |
| 132 | return NULL; |
| 133 | } |
| 134 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 135 | static struct ranap_iu_rnc *iu_rnc_alloc(uint16_t rnc_id, struct osmo_sccp_addr *addr) |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 136 | { |
| 137 | struct ranap_iu_rnc *rnc = talloc_zero(talloc_iu_ctx, struct ranap_iu_rnc); |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 138 | OSMO_ASSERT(rnc); |
| 139 | |
| 140 | INIT_LLIST_HEAD(&rnc->lac_rac_list); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 141 | |
| 142 | rnc->rnc_id = rnc_id; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 143 | rnc->sccp_addr = *addr; |
| 144 | llist_add(&rnc->entry, &rnc_list); |
| 145 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 146 | LOGPIU(LOGL_NOTICE, "New RNC %d at %s\n", rnc->rnc_id, osmo_sccp_addr_dump(addr)); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 147 | |
| 148 | return rnc; |
| 149 | } |
| 150 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 151 | /* Find a match for the given LAC (and RAC). For CS, pass rac as 0. |
| 152 | * If rnc and lre pointers are not NULL, *rnc / *lre are set to NULL if no match is found, or to the |
| 153 | * match if a match is found. Return true if a match is found. */ |
| 154 | static bool iu_rnc_lac_rac_find(struct ranap_iu_rnc **rnc, struct iu_lac_rac_entry **lre, |
| 155 | uint16_t lac, uint8_t rac) |
| 156 | { |
| 157 | struct ranap_iu_rnc *r; |
| 158 | struct iu_lac_rac_entry *e; |
| 159 | |
| 160 | if (rnc) |
| 161 | *rnc = NULL; |
| 162 | if (lre) |
| 163 | *lre = NULL; |
| 164 | |
| 165 | llist_for_each_entry(r, &rnc_list, entry) { |
| 166 | llist_for_each_entry(e, &r->lac_rac_list, entry) { |
| 167 | if (e->lac == lac && e->rac == rac) { |
| 168 | if (rnc) |
| 169 | *rnc = r; |
| 170 | if (lre) |
| 171 | *lre = e; |
| 172 | return true; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | return false; |
| 177 | } |
| 178 | |
| 179 | static struct ranap_iu_rnc *iu_rnc_id_find(uint16_t rnc_id) |
| 180 | { |
| 181 | struct ranap_iu_rnc *rnc; |
| 182 | llist_for_each_entry(rnc, &rnc_list, entry) { |
| 183 | if (rnc->rnc_id == rnc_id) |
| 184 | return rnc; |
| 185 | } |
| 186 | return NULL; |
| 187 | } |
| 188 | |
| 189 | static bool same_sccp_addr(struct osmo_sccp_addr *a, struct osmo_sccp_addr *b) |
| 190 | { |
| 191 | char buf[256]; |
| 192 | osmo_strlcpy(buf, osmo_sccp_addr_dump(a), sizeof(buf)); |
| 193 | return !strcmp(buf, osmo_sccp_addr_dump(b)); |
| 194 | } |
| 195 | |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 196 | static struct ranap_iu_rnc *iu_rnc_register(uint16_t rnc_id, uint16_t lac, |
| 197 | uint8_t rac, struct osmo_sccp_addr *addr) |
| 198 | { |
| 199 | struct ranap_iu_rnc *rnc; |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 200 | struct ranap_iu_rnc *old_rnc; |
| 201 | struct iu_lac_rac_entry *lre; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 202 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 203 | /* Make sure we know this rnc_id and that this SCCP address is in our records */ |
| 204 | rnc = iu_rnc_id_find(rnc_id); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 205 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 206 | if (rnc) { |
| 207 | if (!same_sccp_addr(&rnc->sccp_addr, addr)) { |
| 208 | LOGPIU(LOGL_NOTICE, "RNC %u changed its SCCP addr to %s (LAC=%u RAC=%u)\n", |
| 209 | rnc_id, osmo_sccp_addr_dump(addr), lac, rac); |
| 210 | rnc->sccp_addr = *addr; |
| 211 | } |
| 212 | } else |
| 213 | rnc = iu_rnc_alloc(rnc_id, addr); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 214 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 215 | /* Detect whether the LAC,RAC is already recorded in another RNC */ |
| 216 | iu_rnc_lac_rac_find(&old_rnc, &lre, lac, rac); |
| 217 | |
| 218 | if (old_rnc && old_rnc != rnc) { |
| 219 | /* LAC,RAC already exists in a different RNC */ |
| 220 | LOGPIU(LOGL_NOTICE, "LAC %u RAC %u moved from RNC %u %s", |
| 221 | lac, rac, old_rnc->rnc_id, osmo_sccp_addr_dump(&old_rnc->sccp_addr)); |
| 222 | LOGPIUC(LOGL_NOTICE, " to RNC %u %s\n", |
| 223 | rnc->rnc_id, osmo_sccp_addr_dump(&rnc->sccp_addr)); |
| 224 | |
| 225 | llist_del(&lre->entry); |
| 226 | llist_add(&lre->entry, &rnc->lac_rac_list); |
| 227 | } else if (!old_rnc) { |
| 228 | /* LAC,RAC not recorded yet */ |
| 229 | LOGPIU(LOGL_NOTICE, "RNC %u: new LAC %u RAC %u\n", rnc_id, lac, rac); |
| 230 | lre = talloc_zero(rnc, struct iu_lac_rac_entry); |
| 231 | lre->lac = lac; |
| 232 | lre->rac = rac; |
| 233 | llist_add(&lre->entry, &rnc->lac_rac_list); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 234 | } |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 235 | /* else, LAC,RAC already recorded with the current RNC. */ |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 236 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 237 | return rnc; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | /*********************************************************************** |
| 241 | * RANAP handling |
| 242 | ***********************************************************************/ |
| 243 | |
| 244 | int ranap_iu_rab_act(struct ranap_ue_conn_ctx *ue_ctx, struct msgb *msg) |
| 245 | { |
| 246 | struct osmo_scu_prim *prim; |
| 247 | |
| 248 | /* wrap RANAP message in SCCP N-DATA.req */ |
| 249 | prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim)); |
| 250 | prim->u.data.conn_id = ue_ctx->conn_id; |
| 251 | osmo_prim_init(&prim->oph, |
| 252 | SCCP_SAP_USER, |
| 253 | OSMO_SCU_PRIM_N_DATA, |
| 254 | PRIM_OP_REQUEST, |
| 255 | msg); |
| 256 | return osmo_sccp_user_sap_down(g_scu, &prim->oph); |
| 257 | } |
| 258 | |
| 259 | int ranap_iu_rab_deact(struct ranap_ue_conn_ctx *ue_ctx, uint8_t rab_id) |
| 260 | { |
| 261 | /* FIXME */ |
| 262 | return -1; |
| 263 | } |
| 264 | |
| 265 | int ranap_iu_tx_sec_mode_cmd(struct ranap_ue_conn_ctx *uectx, struct osmo_auth_vector *vec, |
| 266 | int send_ck, int new_key) |
| 267 | { |
| 268 | struct osmo_scu_prim *prim; |
| 269 | struct msgb *msg; |
| 270 | |
| 271 | /* create RANAP message */ |
| 272 | msg = ranap_new_msg_sec_mod_cmd(vec->ik, send_ck? vec->ck : NULL, |
| 273 | new_key ? RANAP_KeyStatus_new : RANAP_KeyStatus_old); |
| 274 | msg->l2h = msg->data; |
| 275 | /* wrap RANAP message in SCCP N-DATA.req */ |
| 276 | prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim)); |
| 277 | prim->u.data.conn_id = uectx->conn_id; |
| 278 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, |
| 279 | OSMO_SCU_PRIM_N_DATA, |
| 280 | PRIM_OP_REQUEST, msg); |
| 281 | osmo_sccp_user_sap_down(g_scu, &prim->oph); |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | int ranap_iu_tx_common_id(struct ranap_ue_conn_ctx *uectx, const char *imsi) |
| 287 | { |
| 288 | struct msgb *msg; |
| 289 | struct osmo_scu_prim *prim; |
| 290 | |
| 291 | LOGPIU(LOGL_INFO, "Transmitting RANAP CommonID (SCCP conn_id %u)\n", |
| 292 | uectx->conn_id); |
| 293 | |
| 294 | msg = ranap_new_msg_common_id(imsi); |
| 295 | msg->l2h = msg->data; |
| 296 | prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim)); |
| 297 | prim->u.data.conn_id = uectx->conn_id; |
| 298 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, |
| 299 | OSMO_SCU_PRIM_N_DATA, |
| 300 | PRIM_OP_REQUEST, msg); |
| 301 | osmo_sccp_user_sap_down(g_scu, &prim->oph); |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | static int iu_grnc_id_parse(struct iu_grnc_id *dst, struct RANAP_GlobalRNC_ID *src) |
| 306 | { |
| 307 | /* The size is coming from arbitrary sender, check it gracefully */ |
| 308 | if (src->pLMNidentity.size != 3) { |
| 309 | LOGPIU(LOGL_ERROR, "Invalid PLMN Identity size:" |
| 310 | " should be 3, is %d\n", src->pLMNidentity.size); |
| 311 | return -1; |
| 312 | } |
| 313 | gsm48_mcc_mnc_from_bcd(&src->pLMNidentity.buf[0], |
| 314 | &dst->mcc, &dst->mnc); |
| 315 | dst->rnc_id = (uint16_t)src->rNC_ID; |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | #if 0 |
| 320 | -- not used at present -- |
| 321 | static int iu_grnc_id_compose(struct iu_grnc_id *src, struct RANAP_GlobalRNC_ID *dst) |
| 322 | { |
| 323 | /* The caller must ensure proper size */ |
| 324 | OSMO_ASSERT(dst->pLMNidentity.size == 3); |
| 325 | gsm48_mcc_mnc_to_bcd(&dst->pLMNidentity.buf[0], |
| 326 | src->mcc, src->mnc); |
| 327 | dst->rNC_ID = src->rnc_id; |
| 328 | return 0; |
| 329 | } |
| 330 | #endif |
| 331 | |
| 332 | struct new_ue_conn_ctx { |
| 333 | struct osmo_sccp_addr sccp_addr; |
| 334 | uint32_t conn_id; |
| 335 | }; |
| 336 | |
| 337 | static int ranap_handle_co_initial_ue(void *ctx, RANAP_InitialUE_MessageIEs_t *ies) |
| 338 | { |
| 339 | struct new_ue_conn_ctx *new_ctx = ctx; |
| 340 | struct gprs_ra_id ra_id; |
| 341 | struct iu_grnc_id grnc_id; |
| 342 | uint16_t sai; |
| 343 | struct ranap_ue_conn_ctx *ue; |
| 344 | struct msgb *msg = msgb_alloc(256, "RANAP->NAS"); |
| 345 | struct ranap_iu_rnc *rnc; |
| 346 | |
| 347 | if (ranap_parse_lai(&ra_id, &ies->lai) != 0) { |
| 348 | LOGPIU(LOGL_ERROR, "Failed to parse RANAP LAI IE\n"); |
| 349 | return -1; |
| 350 | } |
| 351 | |
| 352 | if (ies->presenceMask & INITIALUE_MESSAGEIES_RANAP_RAC_PRESENT) { |
| 353 | ra_id.rac = asn1str_to_u8(&ies->rac); |
| 354 | } |
| 355 | |
| 356 | if (iu_grnc_id_parse(&grnc_id, &ies->globalRNC_ID) != 0) { |
| 357 | LOGPIU(LOGL_ERROR, |
| 358 | "Failed to parse RANAP Global-RNC-ID IE\n"); |
| 359 | return -1; |
| 360 | } |
| 361 | |
| 362 | sai = asn1str_to_u16(&ies->sai.sAC); |
| 363 | msgb_gmmh(msg) = msgb_put(msg, ies->nas_pdu.size); |
| 364 | memcpy(msgb_gmmh(msg), ies->nas_pdu.buf, ies->nas_pdu.size); |
| 365 | |
| 366 | /* Make sure we know the RNC Id and LAC+RAC coming in on this connection. */ |
| 367 | rnc = iu_rnc_register(grnc_id.rnc_id, ra_id.lac, ra_id.rac, &new_ctx->sccp_addr); |
| 368 | |
| 369 | ue = ue_conn_ctx_alloc(rnc, new_ctx->conn_id); |
| 370 | OSMO_ASSERT(ue); |
| 371 | ue->ra_id = ra_id; |
| 372 | |
| 373 | /* Feed into the MM layer */ |
| 374 | msg->dst = ue; |
| 375 | global_iu_recv_cb(msg, &ra_id, &sai); |
| 376 | |
| 377 | msgb_free(msg); |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static int ranap_handle_co_dt(void *ctx, RANAP_DirectTransferIEs_t *ies) |
| 383 | { |
| 384 | struct gprs_ra_id _ra_id, *ra_id = NULL; |
| 385 | uint16_t _sai, *sai = NULL; |
| 386 | struct msgb *msg = msgb_alloc(256, "RANAP->NAS"); |
| 387 | |
| 388 | if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_LAI_PRESENT) { |
| 389 | if (ranap_parse_lai(&_ra_id, &ies->lai) != 0) { |
| 390 | LOGPIU(LOGL_ERROR, "Failed to parse RANAP LAI IE\n"); |
| 391 | return -1; |
| 392 | } |
| 393 | ra_id = &_ra_id; |
| 394 | if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_RAC_PRESENT) { |
| 395 | _ra_id.rac = asn1str_to_u8(&ies->rac); |
| 396 | } |
| 397 | if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_SAI_PRESENT) { |
| 398 | _sai = asn1str_to_u16(&ies->sai.sAC); |
| 399 | sai = &_sai; |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | msgb_gmmh(msg) = msgb_put(msg, ies->nas_pdu.size); |
| 404 | memcpy(msgb_gmmh(msg), ies->nas_pdu.buf, ies->nas_pdu.size); |
| 405 | |
| 406 | /* Feed into the MM/CC/SMS-CP layer */ |
| 407 | msg->dst = ctx; |
| 408 | global_iu_recv_cb(msg, ra_id, sai); |
| 409 | |
| 410 | msgb_free(msg); |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | static int ranap_handle_co_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies) |
| 416 | { |
| 417 | if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT) |
| 418 | LOGPIU(LOGL_ERROR, "Rx Error Indication (%s)\n", |
| 419 | ranap_cause_str(&ies->cause)); |
| 420 | else |
| 421 | LOGPIU(LOGL_ERROR, "Rx Error Indication\n"); |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | int ranap_iu_tx(struct msgb *msg_nas, uint8_t sapi) |
| 427 | { |
| 428 | struct ranap_ue_conn_ctx *uectx = msg_nas->dst; |
| 429 | struct msgb *msg; |
| 430 | struct osmo_scu_prim *prim; |
| 431 | |
| 432 | LOGPIU(LOGL_INFO, "Transmitting L3 Message as RANAP DT (SCCP conn_id %u)\n", |
| 433 | uectx->conn_id); |
| 434 | |
| 435 | msg = ranap_new_msg_dt(sapi, msg_nas->data, msgb_length(msg_nas)); |
| 436 | msgb_free(msg_nas); |
| 437 | msg->l2h = msg->data; |
| 438 | prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim)); |
| 439 | prim->u.data.conn_id = uectx->conn_id; |
| 440 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, |
| 441 | OSMO_SCU_PRIM_N_DATA, |
| 442 | PRIM_OP_REQUEST, msg); |
| 443 | osmo_sccp_user_sap_down(g_scu, &prim->oph); |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | /* Send Iu Release for the given UE connection. |
| 448 | * If cause is NULL, the standard "No remaining RAB" cause is sent, otherwise |
| 449 | * the provided cause. */ |
| 450 | int ranap_iu_tx_release(struct ranap_ue_conn_ctx *ctx, const struct RANAP_Cause *cause) |
| 451 | { |
| 452 | struct msgb *msg; |
| 453 | struct osmo_scu_prim *prim; |
| 454 | static const struct RANAP_Cause default_cause = { |
| 455 | .present = RANAP_Cause_PR_radioNetwork, |
| 456 | .choice.radioNetwork = RANAP_CauseRadioNetwork_no_remaining_rab, |
| 457 | }; |
| 458 | |
| 459 | if (!cause) |
| 460 | cause = &default_cause; |
| 461 | |
| 462 | msg = ranap_new_msg_iu_rel_cmd(cause); |
| 463 | msg->l2h = msg->data; |
| 464 | prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim)); |
| 465 | prim->u.data.conn_id = ctx->conn_id; |
| 466 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, |
| 467 | OSMO_SCU_PRIM_N_DATA, |
| 468 | PRIM_OP_REQUEST, msg); |
| 469 | return osmo_sccp_user_sap_down(g_scu, &prim->oph); |
| 470 | } |
| 471 | |
| 472 | static int ranap_handle_co_iu_rel_req(struct ranap_ue_conn_ctx *ctx, RANAP_Iu_ReleaseRequestIEs_t *ies) |
| 473 | { |
| 474 | LOGPIU(LOGL_INFO, "Received Iu Release Request, Sending Release Command\n"); |
| 475 | ranap_iu_tx_release(ctx, &ies->cause); |
| 476 | return 0; |
| 477 | } |
| 478 | |
| 479 | static int ranap_handle_co_rab_ass_resp(struct ranap_ue_conn_ctx *ctx, RANAP_RAB_AssignmentResponseIEs_t *ies) |
| 480 | { |
| 481 | int rc = -1; |
| 482 | |
| 483 | LOGPIU(LOGL_INFO, |
| 484 | "Rx RAB Assignment Response for UE conn_id %u\n", ctx->conn_id); |
| 485 | if (ies->presenceMask & RAB_ASSIGNMENTRESPONSEIES_RANAP_RAB_SETUPORMODIFIEDLIST_PRESENT) { |
| 486 | /* TODO: Iterate over list of SetupOrModifiedList IEs and handle each one */ |
| 487 | RANAP_IE_t *ranap_ie = ies->raB_SetupOrModifiedList.raB_SetupOrModifiedList_ies.list.array[0]; |
| 488 | RANAP_RAB_SetupOrModifiedItemIEs_t setup_ies; |
| 489 | |
| 490 | rc = ranap_decode_rab_setupormodifieditemies_fromlist(&setup_ies, &ranap_ie->value); |
| 491 | if (rc) { |
| 492 | LOGPIU(LOGL_ERROR, "Error in ranap_decode_rab_setupormodifieditemies()\n"); |
| 493 | return rc; |
| 494 | } |
| 495 | |
| 496 | rc = global_iu_event_cb(ctx, RANAP_IU_EVENT_RAB_ASSIGN, &setup_ies); |
| 497 | |
| 498 | ranap_free_rab_setupormodifieditemies(&setup_ies); |
| 499 | } |
| 500 | /* FIXME: handle RAB Ass failure? */ |
| 501 | |
| 502 | return rc; |
| 503 | } |
| 504 | |
| 505 | static void cn_ranap_handle_co_initial(void *ctx, ranap_message *message) |
| 506 | { |
| 507 | int rc; |
| 508 | |
| 509 | LOGPIU(LOGL_NOTICE, "handle_co_initial(dir=%u, proc=%u)\n", message->direction, message->procedureCode); |
| 510 | |
| 511 | if (message->direction != RANAP_RANAP_PDU_PR_initiatingMessage |
| 512 | || message->procedureCode != RANAP_ProcedureCode_id_InitialUE_Message) { |
| 513 | LOGPIU(LOGL_ERROR, "Expected direction 'InitiatingMessage'," |
| 514 | " procedureCode 'InitialUE_Message', instead got %u and %u\n", |
| 515 | message->direction, message->procedureCode); |
| 516 | rc = -1; |
| 517 | } |
| 518 | else |
| 519 | rc = ranap_handle_co_initial_ue(ctx, &message->msg.initialUE_MessageIEs); |
| 520 | |
| 521 | if (rc) { |
| 522 | LOGPIU(LOGL_ERROR, "Error in %s (%d)\n", __func__, rc); |
| 523 | /* TODO handling of the error? */ |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | /* Entry point for connection-oriented RANAP message */ |
| 528 | static void cn_ranap_handle_co(void *ctx, ranap_message *message) |
| 529 | { |
| 530 | int rc; |
| 531 | |
| 532 | LOGPIU(LOGL_NOTICE, "handle_co(dir=%u, proc=%u)\n", message->direction, message->procedureCode); |
| 533 | |
| 534 | switch (message->direction) { |
| 535 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 536 | switch (message->procedureCode) { |
| 537 | case RANAP_ProcedureCode_id_InitialUE_Message: |
| 538 | LOGPIU(LOGL_ERROR, "Got InitialUE_Message but this is not a new conn\n"); |
| 539 | rc = -1; |
| 540 | break; |
| 541 | case RANAP_ProcedureCode_id_DirectTransfer: |
| 542 | rc = ranap_handle_co_dt(ctx, &message->msg.directTransferIEs); |
| 543 | break; |
| 544 | case RANAP_ProcedureCode_id_ErrorIndication: |
| 545 | rc = ranap_handle_co_err_ind(ctx, &message->msg.errorIndicationIEs); |
| 546 | break; |
| 547 | case RANAP_ProcedureCode_id_Iu_ReleaseRequest: |
| 548 | /* Iu Release Request */ |
| 549 | rc = ranap_handle_co_iu_rel_req(ctx, &message->msg.iu_ReleaseRequestIEs); |
| 550 | break; |
| 551 | default: |
| 552 | LOGPIU(LOGL_ERROR, "Received Initiating Message: unknown Procedure Code %d\n", |
| 553 | message->procedureCode); |
| 554 | rc = -1; |
| 555 | break; |
| 556 | } |
| 557 | break; |
| 558 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 559 | switch (message->procedureCode) { |
| 560 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 561 | /* Security Mode Complete */ |
| 562 | rc = global_iu_event_cb(ctx, RANAP_IU_EVENT_SECURITY_MODE_COMPLETE, NULL); |
| 563 | break; |
| 564 | case RANAP_ProcedureCode_id_Iu_Release: |
| 565 | /* Iu Release Complete */ |
| 566 | rc = global_iu_event_cb(ctx, RANAP_IU_EVENT_IU_RELEASE, NULL); |
| 567 | if (rc) { |
| 568 | LOGPIU(LOGL_ERROR, "Iu Release event: Iu Event callback returned %d\n", |
| 569 | rc); |
| 570 | } |
| 571 | break; |
| 572 | default: |
| 573 | LOGPIU(LOGL_ERROR, "Received Successful Outcome: unknown Procedure Code %d\n", |
| 574 | message->procedureCode); |
| 575 | rc = -1; |
| 576 | break; |
| 577 | } |
| 578 | break; |
| 579 | case RANAP_RANAP_PDU_PR_outcome: |
| 580 | switch (message->procedureCode) { |
| 581 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 582 | /* RAB Assignment Response */ |
| 583 | rc = ranap_handle_co_rab_ass_resp(ctx, &message->msg.raB_AssignmentResponseIEs); |
| 584 | break; |
| 585 | default: |
| 586 | LOGPIU(LOGL_ERROR, "Received Outcome: unknown Procedure Code %d\n", |
| 587 | message->procedureCode); |
| 588 | rc = -1; |
| 589 | break; |
| 590 | } |
| 591 | break; |
| 592 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 593 | default: |
| 594 | LOGPIU(LOGL_ERROR, "Received Unsuccessful Outcome: Procedure Code %d\n", |
| 595 | message->procedureCode); |
| 596 | rc = -1; |
| 597 | break; |
| 598 | } |
| 599 | |
| 600 | if (rc) { |
| 601 | LOGPIU(LOGL_ERROR, "Error in %s (%d)\n", __func__, rc); |
| 602 | /* TODO handling of the error? */ |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | static int ranap_handle_cl_reset_req(void *ctx, RANAP_ResetIEs_t *ies) |
| 607 | { |
| 608 | /* FIXME: send reset response */ |
| 609 | return -1; |
| 610 | } |
| 611 | |
| 612 | static int ranap_handle_cl_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies) |
| 613 | { |
| 614 | if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT) |
| 615 | LOGPIU(LOGL_ERROR, "Rx Error Indication (%s)\n", |
| 616 | ranap_cause_str(&ies->cause)); |
| 617 | else |
| 618 | LOGPIU(LOGL_ERROR, "Rx Error Indication\n"); |
| 619 | |
| 620 | return 0; |
| 621 | } |
| 622 | |
| 623 | /* Entry point for connection-less RANAP message */ |
| 624 | static void cn_ranap_handle_cl(void *ctx, ranap_message *message) |
| 625 | { |
| 626 | int rc; |
| 627 | |
| 628 | switch (message->direction) { |
| 629 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 630 | switch (message->procedureCode) { |
| 631 | case RANAP_ProcedureCode_id_Reset: |
| 632 | /* received reset.req, send reset.resp */ |
| 633 | rc = ranap_handle_cl_reset_req(ctx, &message->msg.resetIEs); |
| 634 | break; |
| 635 | case RANAP_ProcedureCode_id_ErrorIndication: |
| 636 | rc = ranap_handle_cl_err_ind(ctx, &message->msg.errorIndicationIEs); |
| 637 | break; |
| 638 | default: |
| 639 | rc = -1; |
| 640 | break; |
| 641 | } |
| 642 | break; |
| 643 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 644 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 645 | case RANAP_RANAP_PDU_PR_outcome: |
| 646 | default: |
| 647 | rc = -1; |
| 648 | break; |
| 649 | } |
| 650 | |
| 651 | if (rc) { |
| 652 | LOGPIU(LOGL_ERROR, "Error in %s (%d)\n", __func__, rc); |
| 653 | /* TODO handling of the error? */ |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | /*********************************************************************** |
| 658 | * Paging |
| 659 | ***********************************************************************/ |
| 660 | |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 661 | /* Send a paging command down a given SCCP User. tmsi and paging_cause are |
| 662 | * optional and may be passed NULL and 0, respectively, to disable their use. |
| 663 | * See enum RANAP_PagingCause. |
| 664 | * |
| 665 | * If TMSI is given, the IMSI is not sent over the air interface. Nevertheless, |
| 666 | * the IMSI is still required for resolution in the HNB-GW and/or(?) RNC. */ |
| 667 | static int iu_tx_paging_cmd(struct osmo_sccp_addr *called_addr, |
| 668 | const char *imsi, const uint32_t *tmsi, |
| 669 | bool is_ps, uint32_t paging_cause) |
| 670 | { |
| 671 | struct msgb *msg; |
| 672 | msg = ranap_new_msg_paging_cmd(imsi, tmsi, is_ps? 1 : 0, paging_cause); |
| 673 | msg->l2h = msg->data; |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 674 | return osmo_sccp_tx_unitdata_msg(g_scu, &g_local_sccp_addr, called_addr, msg); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 675 | } |
| 676 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 677 | static int iu_page(const char *imsi, const uint32_t *tmsi_or_ptmsi, |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 678 | uint16_t lac, uint8_t rac, bool is_ps) |
| 679 | { |
| 680 | struct ranap_iu_rnc *rnc; |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 681 | int rc; |
| 682 | const char *log_msg; |
| 683 | int log_level; |
| 684 | int paged = 0; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 685 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 686 | iu_rnc_lac_rac_find(&rnc, NULL, lac, rac); |
| 687 | if (rnc) { |
| 688 | if (iu_tx_paging_cmd(&rnc->sccp_addr, imsi, tmsi_or_ptmsi, is_ps, 0) == 0) { |
| 689 | log_msg = "Paging"; |
| 690 | log_level = LOGL_DEBUG; |
| 691 | paged = 1; |
| 692 | } else { |
| 693 | log_msg = "Paging failed"; |
| 694 | log_level = LOGL_ERROR; |
| 695 | } |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 696 | } else { |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 697 | log_msg = "Found no RNC to Page"; |
| 698 | log_level = LOGL_ERROR; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 699 | } |
| 700 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 701 | if (is_ps) |
| 702 | LOGPIU(log_level, "IuPS: %s on LAC %d RAC %d", log_msg, lac, rac); |
| 703 | else |
| 704 | LOGPIU(log_level, "IuCS: %s on LAC %d", log_msg, lac); |
| 705 | if (rnc) |
| 706 | LOGPIUC(log_level, " at SCCP-addr %s", osmo_sccp_addr_dump(&rnc->sccp_addr)); |
| 707 | if (tmsi_or_ptmsi) |
| 708 | LOGPIUC(log_level, ", for %s %08x\n", is_ps? "PTMSI" : "TMSI", *tmsi_or_ptmsi); |
| 709 | else |
| 710 | LOGPIUC(log_level, ", for IMSI %s\n", imsi); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 711 | |
Neels Hofmeyr | 69888c8 | 2017-12-15 02:54:45 +0100 | [diff] [blame] | 712 | return paged; |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | int ranap_iu_page_cs(const char *imsi, const uint32_t *tmsi, uint16_t lac) |
| 716 | { |
| 717 | return iu_page(imsi, tmsi, lac, 0, false); |
| 718 | } |
| 719 | |
| 720 | int ranap_iu_page_ps(const char *imsi, const uint32_t *ptmsi, uint16_t lac, uint8_t rac) |
| 721 | { |
| 722 | return iu_page(imsi, ptmsi, lac, rac, true); |
| 723 | } |
| 724 | |
| 725 | |
| 726 | /*********************************************************************** |
| 727 | * |
| 728 | ***********************************************************************/ |
| 729 | |
| 730 | int tx_unitdata(struct osmo_sccp_user *scu); |
| 731 | int tx_conn_req(struct osmo_sccp_user *scu, uint32_t conn_id); |
| 732 | |
| 733 | struct osmo_prim_hdr *make_conn_req(uint32_t conn_id); |
| 734 | struct osmo_prim_hdr *make_dt1_req(uint32_t conn_id, const uint8_t *data, unsigned int len); |
| 735 | |
| 736 | static struct osmo_prim_hdr *make_conn_resp(struct osmo_scu_connect_param *param) |
| 737 | { |
| 738 | struct msgb *msg = msgb_alloc(1024, "conn_resp"); |
| 739 | struct osmo_scu_prim *prim; |
| 740 | |
| 741 | prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim)); |
| 742 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, |
| 743 | OSMO_SCU_PRIM_N_CONNECT, |
| 744 | PRIM_OP_RESPONSE, msg); |
| 745 | memcpy(&prim->u.connect, param, sizeof(prim->u.connect)); |
| 746 | return &prim->oph; |
| 747 | } |
| 748 | |
| 749 | static int sccp_sap_up(struct osmo_prim_hdr *oph, void *_scu) |
| 750 | { |
| 751 | struct osmo_sccp_user *scu = _scu; |
| 752 | struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph; |
| 753 | struct osmo_prim_hdr *resp = NULL; |
| 754 | int rc; |
| 755 | struct ranap_ue_conn_ctx *ue; |
| 756 | struct new_ue_conn_ctx new_ctx = {}; |
| 757 | |
| 758 | LOGPIU(LOGL_DEBUG, "sccp_sap_up(%s)\n", osmo_scu_prim_name(oph)); |
| 759 | |
| 760 | switch (OSMO_PRIM_HDR(oph)) { |
| 761 | case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM): |
| 762 | /* confirmation of outbound connection */ |
| 763 | rc = -1; |
| 764 | break; |
| 765 | case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION): |
| 766 | /* indication of new inbound connection request*/ |
| 767 | LOGPIU(LOGL_DEBUG, "N-CONNECT.ind(X->%u)\n", prim->u.connect.conn_id); |
| 768 | if (/* prim->u.connect.called_addr.ssn != OSMO_SCCP_SSN_RANAP || */ |
| 769 | !msgb_l2(oph->msg) || msgb_l2len(oph->msg) == 0) { |
| 770 | LOGPIU(LOGL_NOTICE, |
| 771 | "Received invalid N-CONNECT.ind\n"); |
| 772 | return 0; |
| 773 | } |
| 774 | new_ctx.sccp_addr = prim->u.connect.calling_addr; |
| 775 | new_ctx.conn_id = prim->u.connect.conn_id; |
| 776 | /* first ensure the local SCCP socket is ACTIVE */ |
| 777 | resp = make_conn_resp(&prim->u.connect); |
| 778 | osmo_sccp_user_sap_down(scu, resp); |
| 779 | /* then handle the RANAP payload */ |
| 780 | rc = ranap_cn_rx_co(cn_ranap_handle_co_initial, &new_ctx, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 781 | break; |
| 782 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION): |
| 783 | /* indication of disconnect */ |
| 784 | LOGPIU(LOGL_DEBUG, "N-DISCONNECT.ind(%u)\n", |
| 785 | prim->u.disconnect.conn_id); |
| 786 | ue = ue_conn_ctx_find(prim->u.disconnect.conn_id); |
| 787 | rc = ranap_cn_rx_co(cn_ranap_handle_co, ue, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 788 | break; |
| 789 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION): |
| 790 | /* connection-oriented data received */ |
| 791 | LOGPIU(LOGL_DEBUG, "N-DATA.ind(%u, %s)\n", prim->u.data.conn_id, |
| 792 | osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg))); |
| 793 | /* resolve UE context */ |
| 794 | ue = ue_conn_ctx_find(prim->u.data.conn_id); |
| 795 | rc = ranap_cn_rx_co(cn_ranap_handle_co, ue, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 796 | break; |
| 797 | case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION): |
| 798 | /* connection-less data received */ |
| 799 | LOGPIU(LOGL_DEBUG, "N-UNITDATA.ind(%s)\n", |
| 800 | osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg))); |
| 801 | rc = ranap_cn_rx_cl(cn_ranap_handle_cl, scu, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 802 | break; |
| 803 | default: |
| 804 | rc = -1; |
| 805 | break; |
| 806 | } |
| 807 | |
| 808 | msgb_free(oph->msg); |
| 809 | return rc; |
| 810 | } |
| 811 | |
| 812 | int ranap_iu_init(void *ctx, int log_subsystem, const char *sccp_user_name, struct osmo_sccp_instance *sccp, |
| 813 | ranap_iu_recv_cb_t iu_recv_cb, ranap_iu_event_cb_t iu_event_cb) |
| 814 | { |
| 815 | iu_log_subsystem = log_subsystem; |
| 816 | talloc_iu_ctx = talloc_named_const(ctx, 1, "iu"); |
| 817 | talloc_asn1_ctx = talloc_named_const(talloc_iu_ctx, 1, "asn1"); |
| 818 | |
| 819 | global_iu_recv_cb = iu_recv_cb; |
| 820 | global_iu_event_cb = iu_event_cb; |
| 821 | g_sccp = sccp; |
Neels Hofmeyr | 1aef9a6 | 2017-08-12 18:02:44 +0200 | [diff] [blame] | 822 | osmo_sccp_local_addr_by_instance(&g_local_sccp_addr, sccp, OSMO_SCCP_SSN_RANAP); |
Neels Hofmeyr | aae68b2 | 2017-07-05 14:38:52 +0200 | [diff] [blame] | 823 | g_scu = osmo_sccp_user_bind(g_sccp, sccp_user_name, sccp_sap_up, OSMO_SCCP_SSN_RANAP); |
| 824 | |
| 825 | return 0; |
| 826 | } |
| 827 | |