Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 1 | /* RANAP interface for a core-network node */ |
| 2 | |
| 3 | /* (C) 2015 by Harald Welte <laforge@gnumonks.org> |
| 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 <unistd.h> |
| 22 | #include <errno.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #include <osmocom/core/utils.h> |
| 26 | #include <osmocom/core/logging.h> |
| 27 | |
Neels Hofmeyr | 96979af | 2016-01-05 15:19:44 +0100 | [diff] [blame] | 28 | #include <osmocom/ranap/ranap_common.h> |
Harald Welte | 5c6bd51 | 2016-01-05 15:05:03 +0100 | [diff] [blame] | 29 | #include <osmocom/ranap/ranap_common_cn.h> |
Neels Hofmeyr | 96979af | 2016-01-05 15:19:44 +0100 | [diff] [blame] | 30 | #include <osmocom/ranap/ranap_ies_defs.h> |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 31 | |
Harald Welte | cee5a28 | 2015-12-26 08:43:31 +0100 | [diff] [blame] | 32 | #include "hnbgw.h" |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 33 | |
| 34 | static int cn_ranap_rx_initiating_msg_co(void *ctx, RANAP_InitiatingMessage_t *imsg, |
| 35 | ranap_message *message) |
| 36 | { |
| 37 | int rc = 0; |
| 38 | |
| 39 | message->procedureCode = imsg->procedureCode; |
| 40 | message->criticality = imsg->criticality; |
| 41 | |
| 42 | DEBUGP(DRANAP, "Rx CO IM (%s)\n", |
| 43 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 44 | |
| 45 | switch (imsg->procedureCode) { |
| 46 | case RANAP_ProcedureCode_id_InitialUE_Message: |
| 47 | rc = ranap_decode_initialue_messageies(&message->msg.initialUE_MessageIEs, &imsg->value); |
| 48 | break; |
| 49 | case RANAP_ProcedureCode_id_DirectTransfer: |
| 50 | rc = ranap_decode_directtransferies(&message->msg.directTransferIEs, &imsg->value); |
| 51 | break; |
| 52 | case RANAP_ProcedureCode_id_RAB_ReleaseRequest: |
| 53 | /* RNC requests the release of RAB */ |
| 54 | rc = ranap_decode_rab_releaserequesties(&message->msg.raB_ReleaseRequestIEs, &imsg->value); |
| 55 | break; |
| 56 | case RANAP_ProcedureCode_id_Iu_ReleaseRequest: |
| 57 | /* RNC requests the release of Iu */ |
| 58 | rc = ranap_decode_iu_releaserequesties(&message->msg.iu_ReleaseRequestIEs, &imsg->value); |
| 59 | break; |
| 60 | case RANAP_ProcedureCode_id_ErrorIndication: |
| 61 | rc = ranap_decode_errorindicationies(&message->msg.errorIndicationIEs, &imsg->value); |
| 62 | break; |
| 63 | case RANAP_ProcedureCode_id_RAB_ModifyRequest: |
| 64 | rc = ranap_decode_rab_modifyrequesties(&message->msg.raB_ModifyRequestIEs, &imsg->value); |
| 65 | break; |
| 66 | default: |
| 67 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 68 | "Procedure %s (CO, IM) from RNC, ignoring\n", |
| 69 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 70 | rc = -1; |
| 71 | break; |
| 72 | } |
| 73 | |
| 74 | return rc; |
| 75 | } |
| 76 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 77 | static void cn_ranap_free_initiating_msg_co(ranap_message *message) |
| 78 | { |
| 79 | switch (message->procedureCode) { |
| 80 | case RANAP_ProcedureCode_id_InitialUE_Message: |
| 81 | ranap_free_initialue_messageies(&message->msg.initialUE_MessageIEs); |
| 82 | break; |
| 83 | case RANAP_ProcedureCode_id_DirectTransfer: |
| 84 | ranap_free_directtransferies(&message->msg.directTransferIEs); |
| 85 | break; |
| 86 | case RANAP_ProcedureCode_id_RAB_ReleaseRequest: |
| 87 | /* RNC requests the release of RAB */ |
| 88 | ranap_free_rab_releaserequesties(&message->msg.raB_ReleaseRequestIEs); |
| 89 | break; |
| 90 | case RANAP_ProcedureCode_id_Iu_ReleaseRequest: |
| 91 | /* RNC requests the release of Iu */ |
| 92 | ranap_free_iu_releaserequesties(&message->msg.iu_ReleaseRequestIEs); |
| 93 | break; |
| 94 | case RANAP_ProcedureCode_id_ErrorIndication: |
| 95 | ranap_free_errorindicationies(&message->msg.errorIndicationIEs); |
| 96 | break; |
| 97 | case RANAP_ProcedureCode_id_RAB_ModifyRequest: |
| 98 | ranap_free_rab_modifyrequesties(&message->msg.raB_ModifyRequestIEs); |
| 99 | break; |
| 100 | default: |
| 101 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 102 | "Procedure %s (CO, IM) from RNC\n", |
| 103 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 104 | break; |
| 105 | } |
| 106 | } |
| 107 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 108 | static int cn_ranap_rx_successful_msg_co(void *ctx, RANAP_SuccessfulOutcome_t *imsg, |
| 109 | ranap_message *message) |
| 110 | { |
| 111 | int rc = 0; |
| 112 | |
| 113 | message->procedureCode = imsg->procedureCode; |
| 114 | message->criticality = imsg->criticality; |
| 115 | |
Harald Welte | a31e63a | 2015-12-28 13:19:35 +0100 | [diff] [blame] | 116 | DEBUGP(DRANAP, "Rx CO SO (%s)\n", |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 117 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 118 | |
| 119 | switch (imsg->procedureCode) { |
| 120 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 121 | /* RAB assignment response */ |
| 122 | rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value); |
| 123 | break; |
| 124 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 125 | /* Security Mode Complete */ |
| 126 | rc = ranap_decode_securitymodecompleteies(&message->msg.securityModeCompleteIEs, &imsg->value); |
| 127 | break; |
| 128 | case RANAP_ProcedureCode_id_Iu_Release: |
| 129 | /* Iu release Complete; confirmation of CN-initiated release */ |
| 130 | rc = ranap_decode_iu_releasecompleteies(&message->msg.iu_ReleaseCompleteIEs, &imsg->value); |
| 131 | break; |
| 132 | default: |
| 133 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 134 | "Procedure %s (SO) from RNC, ignoring\n", |
| 135 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 136 | rc = -1; |
| 137 | break; |
| 138 | } |
| 139 | |
| 140 | return rc; |
| 141 | } |
| 142 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 143 | static void cn_ranap_free_successful_msg_co(ranap_message *message) |
| 144 | { |
| 145 | switch (message->procedureCode) { |
| 146 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 147 | /* RAB assignment response */ |
| 148 | ranap_free_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs); |
| 149 | break; |
| 150 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 151 | /* Security Mode Complete */ |
| 152 | ranap_free_securitymodecompleteies(&message->msg.securityModeCompleteIEs); |
| 153 | break; |
| 154 | case RANAP_ProcedureCode_id_Iu_Release: |
| 155 | /* Iu release Complete; confirmation of CN-initiated release */ |
| 156 | ranap_free_iu_releasecompleteies(&message->msg.iu_ReleaseCompleteIEs); |
| 157 | break; |
| 158 | default: |
| 159 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 160 | "Procedure %s (SO) from RNC\n", |
| 161 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 162 | break; |
| 163 | } |
| 164 | } |
| 165 | |
Harald Welte | 7bccc98 | 2015-12-28 14:44:49 +0100 | [diff] [blame] | 166 | static int cn_ranap_rx_outcome_msg_co(void *ctx, RANAP_Outcome_t *imsg, |
| 167 | ranap_message *message) |
| 168 | { |
| 169 | int rc = 0; |
| 170 | |
| 171 | message->procedureCode = imsg->procedureCode; |
| 172 | message->criticality = imsg->criticality; |
| 173 | |
| 174 | DEBUGP(DRANAP, "Rx CO O (%s)\n", |
| 175 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 176 | |
| 177 | switch (imsg->procedureCode) { |
| 178 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 179 | /* RAB assignment response */ |
| 180 | rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value); |
| 181 | break; |
| 182 | default: |
| 183 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 184 | "Procedure %s (O) from RNC, ignoring\n", |
| 185 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 186 | rc = -1; |
| 187 | break; |
| 188 | } |
| 189 | |
| 190 | return rc; |
| 191 | } |
| 192 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 193 | static void cn_ranap_free_outcome_msg_co(ranap_message *message) |
| 194 | { |
| 195 | switch (message->procedureCode) { |
| 196 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 197 | /* RAB assignment response */ |
| 198 | ranap_free_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs); |
| 199 | break; |
| 200 | default: |
| 201 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 202 | "Procedure %s (O) from RNC\n", |
| 203 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 204 | break; |
| 205 | } |
| 206 | } |
| 207 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 208 | static int _cn_ranap_rx_co(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message) |
| 209 | { |
| 210 | int rc = 0; |
| 211 | |
| 212 | switch (pdu->present) { |
| 213 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 214 | rc = cn_ranap_rx_initiating_msg_co(ctx, &pdu->choice.initiatingMessage, message); |
| 215 | break; |
| 216 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 217 | rc = cn_ranap_rx_successful_msg_co(ctx, &pdu->choice.successfulOutcome, message); |
| 218 | break; |
| 219 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 220 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
| 221 | "unsuccessful outcome procedure %s (CO) from RNC, ignoring\n", |
| 222 | get_value_string(ranap_procedure_code_vals, |
| 223 | pdu->choice.unsuccessfulOutcome.procedureCode)); |
| 224 | rc = -1; |
| 225 | break; |
Harald Welte | 7bccc98 | 2015-12-28 14:44:49 +0100 | [diff] [blame] | 226 | case RANAP_RANAP_PDU_PR_outcome: |
Daniel Willmann | 366dcf2 | 2016-01-07 14:12:07 +0100 | [diff] [blame] | 227 | rc = cn_ranap_rx_outcome_msg_co(ctx, &pdu->choice.outcome, message); |
Harald Welte | 7bccc98 | 2015-12-28 14:44:49 +0100 | [diff] [blame] | 228 | break; |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 229 | default: |
| 230 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 231 | "presence %s (CO) from RNC, ignoring\n", |
| 232 | get_value_string(ranap_presence_vals, pdu->present)); |
| 233 | rc = -1; |
| 234 | break; |
| 235 | } |
| 236 | |
| 237 | return rc; |
| 238 | } |
| 239 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 240 | static void _cn_ranap_free_co(ranap_message *message) |
| 241 | { |
| 242 | switch (message->direction) { |
| 243 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 244 | cn_ranap_free_initiating_msg_co(message); |
| 245 | break; |
| 246 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 247 | cn_ranap_free_successful_msg_co(message); |
| 248 | break; |
| 249 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 250 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing unsupported RANAP " |
| 251 | "unsuccessful outcome procedure (CO) from RNC\n"); |
| 252 | break; |
| 253 | case RANAP_RANAP_PDU_PR_outcome: |
| 254 | cn_ranap_free_outcome_msg_co(message); |
| 255 | break; |
| 256 | default: |
| 257 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 258 | "presence %s (CO) from RNC, ignoring\n", |
| 259 | get_value_string(ranap_presence_vals, message->direction)); |
| 260 | break; |
| 261 | } |
| 262 | } |
| 263 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 264 | /* receive a connection-oriented RANAP message and call |
| 265 | * cn_ranap_handle_co() with the resulting ranap_message struct */ |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 266 | int ranap_cn_rx_co(ranap_handle_cb cb, void *ctx, uint8_t *data, size_t len) |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 267 | { |
| 268 | RANAP_RANAP_PDU_t *pdu = NULL; |
| 269 | ranap_message message; |
| 270 | asn_dec_rval_t dec_ret; |
| 271 | int rc; |
| 272 | |
| 273 | memset(&message, 0, sizeof(message)); |
| 274 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 275 | dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| 276 | data, len, 0, 0); |
| 277 | if (dec_ret.code != RC_OK) { |
| 278 | LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
| 279 | return rc; |
| 280 | } |
| 281 | |
| 282 | message.direction = pdu->present; |
| 283 | |
| 284 | rc = _cn_ranap_rx_co(ctx, pdu, &message); |
| 285 | |
| 286 | if (rc == 0) |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 287 | (*cb)(ctx, &message); |
Harald Welte | 4928797 | 2015-12-29 19:00:35 +0100 | [diff] [blame] | 288 | else |
| 289 | LOGP(DRANAP, LOGL_ERROR, "Not calling cn_ranap_handle_co() due to rc=%d\n", rc); |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 290 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 291 | /* Free the asn1 structs in message */ |
| 292 | _cn_ranap_free_co(&message); |
| 293 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 294 | ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu); |
| 295 | |
| 296 | return rc; |
| 297 | } |
| 298 | |
| 299 | static int cn_ranap_rx_initiating_msg_cl(void *ctx, RANAP_InitiatingMessage_t *imsg, |
| 300 | ranap_message *message) |
| 301 | { |
| 302 | int rc; |
| 303 | |
| 304 | message->procedureCode = imsg->procedureCode; |
| 305 | message->criticality = imsg->criticality; |
| 306 | |
| 307 | DEBUGP(DRANAP, "Rx CL IM (%s)\n", |
| 308 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 309 | |
| 310 | switch (imsg->procedureCode) { |
| 311 | case RANAP_ProcedureCode_id_Reset: |
| 312 | /* Reset request */ |
| 313 | rc = ranap_decode_reseties(&message->msg.resetIEs, &imsg->value); |
| 314 | break; |
| 315 | case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */ |
| 316 | rc = ranap_decode_overloadies(&message->msg.overloadIEs, &imsg->value); |
| 317 | break; |
| 318 | case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */ |
| 319 | rc = ranap_decode_errorindicationies(&message->msg.errorIndicationIEs, &imsg->value); |
| 320 | break; |
| 321 | case RANAP_ProcedureCode_id_ResetResource: /* request */ |
| 322 | rc = ranap_decode_resetresourceies(&message->msg.resetResourceIEs, &imsg->value); |
| 323 | break; |
| 324 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 325 | rc = ranap_decode_informationtransferindicationies(&message->msg.informationTransferIndicationIEs, &imsg->value); |
| 326 | break; |
| 327 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 328 | rc = ranap_decode_directinformationtransferies(&message->msg.directInformationTransferIEs, &imsg->value); |
| 329 | break; |
| 330 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 331 | rc = ranap_decode_uplinkinformationexchangerequesties(&message->msg.uplinkInformationExchangeRequestIEs, &imsg->value); |
| 332 | break; |
| 333 | default: |
| 334 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 335 | "Procedure %s (CL, IM) from RNC, ignoring\n", |
| 336 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 337 | break; |
| 338 | } |
| 339 | } |
| 340 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 341 | static void cn_ranap_free_initiating_msg_cl(ranap_message *message) |
| 342 | { |
| 343 | |
| 344 | switch (message->procedureCode) { |
| 345 | case RANAP_ProcedureCode_id_Reset: |
| 346 | /* Reset request */ |
| 347 | ranap_free_reseties(&message->msg.resetIEs); |
| 348 | break; |
| 349 | case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */ |
| 350 | ranap_free_overloadies(&message->msg.overloadIEs); |
| 351 | break; |
| 352 | case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */ |
| 353 | ranap_free_errorindicationies(&message->msg.errorIndicationIEs); |
| 354 | break; |
| 355 | case RANAP_ProcedureCode_id_ResetResource: /* request */ |
| 356 | ranap_free_resetresourceies(&message->msg.resetResourceIEs); |
| 357 | break; |
| 358 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 359 | ranap_free_informationtransferindicationies(&message->msg.informationTransferIndicationIEs); |
| 360 | break; |
| 361 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 362 | ranap_free_directinformationtransferies(&message->msg.directInformationTransferIEs); |
| 363 | break; |
| 364 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 365 | ranap_free_uplinkinformationexchangerequesties(&message->msg.uplinkInformationExchangeRequestIEs); |
| 366 | break; |
| 367 | default: |
| 368 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 369 | "Procedure %s (CL, IM)\n", |
| 370 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 371 | break; |
| 372 | } |
| 373 | } |
| 374 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 375 | static int cn_ranap_rx_successful_msg_cl(void *ctx, RANAP_SuccessfulOutcome_t *imsg, |
| 376 | ranap_message *message) |
| 377 | { |
| 378 | int rc; |
| 379 | |
| 380 | message->procedureCode = imsg->procedureCode; |
| 381 | message->criticality = imsg->criticality; |
| 382 | |
| 383 | DEBUGP(DRANAP, "Rx CL SO (%s)\n", |
| 384 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 385 | |
| 386 | switch (imsg->procedureCode) { |
| 387 | case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */ |
| 388 | rc = ranap_decode_resetacknowledgeies(&message->msg.resetAcknowledgeIEs, &imsg->value); |
| 389 | break; |
| 390 | case RANAP_ProcedureCode_id_ResetResource: /* response */ |
| 391 | rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value); |
Daniel Willmann | 618f0f5 | 2016-01-07 14:11:01 +0100 | [diff] [blame] | 392 | break; |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 393 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 394 | rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value); |
| 395 | break; |
| 396 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 397 | rc = ranap_decode_informationtransferconfirmationies(&message->msg.informationTransferConfirmationIEs, &imsg->value); |
| 398 | break; |
| 399 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 400 | rc = ranap_decode_uplinkinformationexchangeresponseies(&message->msg.uplinkInformationExchangeResponseIEs, &imsg->value); |
| 401 | break; |
| 402 | default: |
| 403 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 404 | "Procedure %s (CL, SO) from RNC, ignoring\n", |
| 405 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 406 | break; |
| 407 | } |
| 408 | } |
| 409 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 410 | static void cn_ranap_free_successful_msg_cl(ranap_message *message) |
| 411 | { |
| 412 | switch (message->procedureCode) { |
| 413 | case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */ |
| 414 | ranap_free_resetacknowledgeies(&message->msg.resetAcknowledgeIEs); |
| 415 | break; |
| 416 | case RANAP_ProcedureCode_id_ResetResource: /* response */ |
| 417 | ranap_free_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs); |
| 418 | break; |
| 419 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 420 | ranap_free_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs); |
| 421 | break; |
| 422 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 423 | ranap_free_informationtransferconfirmationies(&message->msg.informationTransferConfirmationIEs); |
| 424 | break; |
| 425 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 426 | ranap_free_uplinkinformationexchangeresponseies(&message->msg.uplinkInformationExchangeResponseIEs); |
| 427 | break; |
| 428 | default: |
| 429 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 430 | "Procedure %s (CL, SO)\n", |
| 431 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 432 | break; |
| 433 | } |
| 434 | } |
| 435 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 436 | static int _cn_ranap_rx_cl(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message) |
| 437 | { |
| 438 | int rc; |
| 439 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 440 | /* Extend _cn_ranap_free_cl as well when extending this function */ |
| 441 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 442 | switch (pdu->present) { |
| 443 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 444 | rc = cn_ranap_rx_initiating_msg_cl(ctx, &pdu->choice.initiatingMessage, |
| 445 | message); |
| 446 | break; |
| 447 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 448 | rc = cn_ranap_rx_successful_msg_cl(ctx, &pdu->choice.successfulOutcome, |
| 449 | message); |
| 450 | break; |
| 451 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 452 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
| 453 | "unsuccessful outcome procedure %s (CL) from RNC, ignoring\n", |
| 454 | get_value_string(ranap_procedure_code_vals, |
| 455 | pdu->choice.unsuccessfulOutcome.procedureCode)); |
| 456 | break; |
| 457 | default: |
| 458 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 459 | "presence %s (CL) from RNC, ignoring\n", |
| 460 | get_value_string(ranap_presence_vals, pdu->present)); |
| 461 | break; |
| 462 | } |
| 463 | } |
| 464 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 465 | static void _cn_ranap_free_cl(ranap_message *message) |
| 466 | { |
| 467 | switch (message->direction) { |
| 468 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 469 | cn_ranap_free_initiating_msg_cl(message); |
| 470 | break; |
| 471 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 472 | cn_ranap_free_successful_msg_cl(message); |
| 473 | break; |
| 474 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 475 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing unsupported RANAP " |
| 476 | "unsuccessful outcome procedure from RNC\n"); |
| 477 | break; |
| 478 | default: |
| 479 | LOGP(DRANAP, LOGL_NOTICE, "Suspicious RANAP " |
| 480 | "presence %s (CL) from RNC, ignoring\n", message->direction); |
| 481 | break; |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | /* receive a connection-less RANAP message and call |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 486 | * cn_ranap_handle_co() with the resulting ranap_message struct */ |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 487 | int ranap_cn_rx_cl(ranap_handle_cb cb, void *ctx, uint8_t *data, size_t len) |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 488 | { |
| 489 | RANAP_RANAP_PDU_t *pdu = NULL; |
| 490 | ranap_message message; |
| 491 | asn_dec_rval_t dec_ret; |
| 492 | int rc; |
| 493 | |
| 494 | memset(&message, 0, sizeof(message)); |
| 495 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 496 | dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| 497 | data, len, 0, 0); |
| 498 | if (dec_ret.code != RC_OK) { |
| 499 | LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
| 500 | return rc; |
| 501 | } |
| 502 | |
| 503 | message.direction = pdu->present; |
| 504 | |
| 505 | rc = _cn_ranap_rx_cl(ctx, pdu, &message); |
| 506 | |
| 507 | if (rc == 0) |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 508 | (*cb)(ctx, &message); |
Harald Welte | 4928797 | 2015-12-29 19:00:35 +0100 | [diff] [blame] | 509 | else |
| 510 | LOGP(DRANAP, LOGL_ERROR, "Not calling cn_ranap_handle_cl() due to rc=%d\n", rc); |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 511 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 512 | /* Free the asn1 structs in message */ |
| 513 | _cn_ranap_free_cl(&message); |
| 514 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 515 | ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu); |
| 516 | |
| 517 | return rc; |
| 518 | } |