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; |
Neels Hofmeyr | 68b7a47 | 2016-04-19 00:13:11 +0200 | [diff] [blame] | 66 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 67 | /* Only an RNC will receive a Security Mode Control as |
| 68 | * Initiating Message, in other words: only hnb-test. */ |
| 69 | rc = ranap_decode_securitymodecommandies(&message->msg.securityModeCommandIEs, &imsg->value); |
| 70 | break; |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 71 | default: |
| 72 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 73 | "Procedure %s (CO, IM) from RNC, ignoring\n", |
| 74 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 75 | rc = -1; |
| 76 | break; |
| 77 | } |
| 78 | |
| 79 | return rc; |
| 80 | } |
| 81 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 82 | static void cn_ranap_free_initiating_msg_co(ranap_message *message) |
| 83 | { |
| 84 | switch (message->procedureCode) { |
| 85 | case RANAP_ProcedureCode_id_InitialUE_Message: |
| 86 | ranap_free_initialue_messageies(&message->msg.initialUE_MessageIEs); |
| 87 | break; |
| 88 | case RANAP_ProcedureCode_id_DirectTransfer: |
| 89 | ranap_free_directtransferies(&message->msg.directTransferIEs); |
| 90 | break; |
| 91 | case RANAP_ProcedureCode_id_RAB_ReleaseRequest: |
| 92 | /* RNC requests the release of RAB */ |
| 93 | ranap_free_rab_releaserequesties(&message->msg.raB_ReleaseRequestIEs); |
| 94 | break; |
| 95 | case RANAP_ProcedureCode_id_Iu_ReleaseRequest: |
| 96 | /* RNC requests the release of Iu */ |
| 97 | ranap_free_iu_releaserequesties(&message->msg.iu_ReleaseRequestIEs); |
| 98 | break; |
| 99 | case RANAP_ProcedureCode_id_ErrorIndication: |
| 100 | ranap_free_errorindicationies(&message->msg.errorIndicationIEs); |
| 101 | break; |
| 102 | case RANAP_ProcedureCode_id_RAB_ModifyRequest: |
| 103 | ranap_free_rab_modifyrequesties(&message->msg.raB_ModifyRequestIEs); |
| 104 | break; |
Neels Hofmeyr | 68b7a47 | 2016-04-19 00:13:11 +0200 | [diff] [blame] | 105 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 106 | /* Only an RNC will receive a Security Mode Control as |
| 107 | * Initiating Message, in other words: only hnb-test. */ |
| 108 | ranap_free_securitymodecommandies(&message->msg.securityModeCommandIEs); |
| 109 | break; |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 110 | default: |
| 111 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 112 | "Procedure %s (CO, IM) from RNC\n", |
| 113 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 114 | break; |
| 115 | } |
| 116 | } |
| 117 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 118 | static int cn_ranap_rx_successful_msg_co(void *ctx, RANAP_SuccessfulOutcome_t *imsg, |
| 119 | ranap_message *message) |
| 120 | { |
| 121 | int rc = 0; |
| 122 | |
| 123 | message->procedureCode = imsg->procedureCode; |
| 124 | message->criticality = imsg->criticality; |
| 125 | |
Harald Welte | a31e63a | 2015-12-28 13:19:35 +0100 | [diff] [blame] | 126 | DEBUGP(DRANAP, "Rx CO SO (%s)\n", |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 127 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 128 | |
| 129 | switch (imsg->procedureCode) { |
| 130 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 131 | /* RAB assignment response */ |
| 132 | rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value); |
| 133 | break; |
| 134 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 135 | /* Security Mode Complete */ |
| 136 | rc = ranap_decode_securitymodecompleteies(&message->msg.securityModeCompleteIEs, &imsg->value); |
| 137 | break; |
| 138 | case RANAP_ProcedureCode_id_Iu_Release: |
| 139 | /* Iu release Complete; confirmation of CN-initiated release */ |
| 140 | rc = ranap_decode_iu_releasecompleteies(&message->msg.iu_ReleaseCompleteIEs, &imsg->value); |
| 141 | break; |
| 142 | default: |
| 143 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 144 | "Procedure %s (SO) from RNC, ignoring\n", |
| 145 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 146 | rc = -1; |
| 147 | break; |
| 148 | } |
| 149 | |
| 150 | return rc; |
| 151 | } |
| 152 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 153 | static void cn_ranap_free_successful_msg_co(ranap_message *message) |
| 154 | { |
| 155 | switch (message->procedureCode) { |
| 156 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 157 | /* RAB assignment response */ |
| 158 | ranap_free_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs); |
| 159 | break; |
| 160 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 161 | /* Security Mode Complete */ |
| 162 | ranap_free_securitymodecompleteies(&message->msg.securityModeCompleteIEs); |
| 163 | break; |
| 164 | case RANAP_ProcedureCode_id_Iu_Release: |
| 165 | /* Iu release Complete; confirmation of CN-initiated release */ |
| 166 | ranap_free_iu_releasecompleteies(&message->msg.iu_ReleaseCompleteIEs); |
| 167 | break; |
| 168 | default: |
| 169 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 170 | "Procedure %s (SO) from RNC\n", |
| 171 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 172 | break; |
| 173 | } |
| 174 | } |
| 175 | |
Harald Welte | 7bccc98 | 2015-12-28 14:44:49 +0100 | [diff] [blame] | 176 | static int cn_ranap_rx_outcome_msg_co(void *ctx, RANAP_Outcome_t *imsg, |
| 177 | ranap_message *message) |
| 178 | { |
| 179 | int rc = 0; |
| 180 | |
| 181 | message->procedureCode = imsg->procedureCode; |
| 182 | message->criticality = imsg->criticality; |
| 183 | |
| 184 | DEBUGP(DRANAP, "Rx CO O (%s)\n", |
| 185 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 186 | |
| 187 | switch (imsg->procedureCode) { |
| 188 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 189 | /* RAB assignment response */ |
| 190 | rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value); |
| 191 | break; |
| 192 | default: |
| 193 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 194 | "Procedure %s (O) from RNC, ignoring\n", |
| 195 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 196 | rc = -1; |
| 197 | break; |
| 198 | } |
| 199 | |
| 200 | return rc; |
| 201 | } |
| 202 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 203 | static void cn_ranap_free_outcome_msg_co(ranap_message *message) |
| 204 | { |
| 205 | switch (message->procedureCode) { |
| 206 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 207 | /* RAB assignment response */ |
| 208 | ranap_free_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs); |
| 209 | break; |
| 210 | default: |
| 211 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 212 | "Procedure %s (O) from RNC\n", |
| 213 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 214 | break; |
| 215 | } |
| 216 | } |
| 217 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 218 | static int _cn_ranap_rx_co(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message) |
| 219 | { |
| 220 | int rc = 0; |
| 221 | |
| 222 | switch (pdu->present) { |
| 223 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 224 | rc = cn_ranap_rx_initiating_msg_co(ctx, &pdu->choice.initiatingMessage, message); |
| 225 | break; |
| 226 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 227 | rc = cn_ranap_rx_successful_msg_co(ctx, &pdu->choice.successfulOutcome, message); |
| 228 | break; |
| 229 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 230 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
| 231 | "unsuccessful outcome procedure %s (CO) from RNC, ignoring\n", |
| 232 | get_value_string(ranap_procedure_code_vals, |
| 233 | pdu->choice.unsuccessfulOutcome.procedureCode)); |
| 234 | rc = -1; |
| 235 | break; |
Harald Welte | 7bccc98 | 2015-12-28 14:44:49 +0100 | [diff] [blame] | 236 | case RANAP_RANAP_PDU_PR_outcome: |
Daniel Willmann | 366dcf2 | 2016-01-07 14:12:07 +0100 | [diff] [blame] | 237 | rc = cn_ranap_rx_outcome_msg_co(ctx, &pdu->choice.outcome, message); |
Harald Welte | 7bccc98 | 2015-12-28 14:44:49 +0100 | [diff] [blame] | 238 | break; |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 239 | default: |
| 240 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 241 | "presence %s (CO) from RNC, ignoring\n", |
| 242 | get_value_string(ranap_presence_vals, pdu->present)); |
| 243 | rc = -1; |
| 244 | break; |
| 245 | } |
| 246 | |
| 247 | return rc; |
| 248 | } |
| 249 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 250 | static void _cn_ranap_free_co(ranap_message *message) |
| 251 | { |
| 252 | switch (message->direction) { |
| 253 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 254 | cn_ranap_free_initiating_msg_co(message); |
| 255 | break; |
| 256 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 257 | cn_ranap_free_successful_msg_co(message); |
| 258 | break; |
| 259 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 260 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing unsupported RANAP " |
| 261 | "unsuccessful outcome procedure (CO) from RNC\n"); |
| 262 | break; |
| 263 | case RANAP_RANAP_PDU_PR_outcome: |
| 264 | cn_ranap_free_outcome_msg_co(message); |
| 265 | break; |
| 266 | default: |
| 267 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 268 | "presence %s (CO) from RNC, ignoring\n", |
| 269 | get_value_string(ranap_presence_vals, message->direction)); |
| 270 | break; |
| 271 | } |
| 272 | } |
| 273 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 274 | /* receive a connection-oriented RANAP message and call |
| 275 | * cn_ranap_handle_co() with the resulting ranap_message struct */ |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 276 | 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] | 277 | { |
| 278 | RANAP_RANAP_PDU_t *pdu = NULL; |
| 279 | ranap_message message; |
| 280 | asn_dec_rval_t dec_ret; |
| 281 | int rc; |
| 282 | |
| 283 | memset(&message, 0, sizeof(message)); |
| 284 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 285 | dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| 286 | data, len, 0, 0); |
| 287 | if (dec_ret.code != RC_OK) { |
| 288 | LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
| 289 | return rc; |
| 290 | } |
| 291 | |
| 292 | message.direction = pdu->present; |
| 293 | |
| 294 | rc = _cn_ranap_rx_co(ctx, pdu, &message); |
| 295 | |
| 296 | if (rc == 0) |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 297 | (*cb)(ctx, &message); |
Harald Welte | 4928797 | 2015-12-29 19:00:35 +0100 | [diff] [blame] | 298 | else |
| 299 | 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] | 300 | |
Daniel Willmann | c858fe9 | 2016-01-07 14:28:06 +0100 | [diff] [blame] | 301 | /* Free the asn1 structs in message */ |
| 302 | _cn_ranap_free_co(&message); |
| 303 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 304 | ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu); |
| 305 | |
| 306 | return rc; |
| 307 | } |
| 308 | |
| 309 | static int cn_ranap_rx_initiating_msg_cl(void *ctx, RANAP_InitiatingMessage_t *imsg, |
| 310 | ranap_message *message) |
| 311 | { |
| 312 | int rc; |
| 313 | |
| 314 | message->procedureCode = imsg->procedureCode; |
| 315 | message->criticality = imsg->criticality; |
| 316 | |
| 317 | DEBUGP(DRANAP, "Rx CL IM (%s)\n", |
| 318 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 319 | |
| 320 | switch (imsg->procedureCode) { |
| 321 | case RANAP_ProcedureCode_id_Reset: |
| 322 | /* Reset request */ |
| 323 | rc = ranap_decode_reseties(&message->msg.resetIEs, &imsg->value); |
| 324 | break; |
| 325 | case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */ |
| 326 | rc = ranap_decode_overloadies(&message->msg.overloadIEs, &imsg->value); |
| 327 | break; |
| 328 | case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */ |
| 329 | rc = ranap_decode_errorindicationies(&message->msg.errorIndicationIEs, &imsg->value); |
| 330 | break; |
| 331 | case RANAP_ProcedureCode_id_ResetResource: /* request */ |
| 332 | rc = ranap_decode_resetresourceies(&message->msg.resetResourceIEs, &imsg->value); |
| 333 | break; |
| 334 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 335 | rc = ranap_decode_informationtransferindicationies(&message->msg.informationTransferIndicationIEs, &imsg->value); |
| 336 | break; |
| 337 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 338 | rc = ranap_decode_directinformationtransferies(&message->msg.directInformationTransferIEs, &imsg->value); |
| 339 | break; |
| 340 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 341 | rc = ranap_decode_uplinkinformationexchangerequesties(&message->msg.uplinkInformationExchangeRequestIEs, &imsg->value); |
| 342 | break; |
| 343 | default: |
| 344 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 345 | "Procedure %s (CL, IM) from RNC, ignoring\n", |
| 346 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 351 | static void cn_ranap_free_initiating_msg_cl(ranap_message *message) |
| 352 | { |
| 353 | |
| 354 | switch (message->procedureCode) { |
| 355 | case RANAP_ProcedureCode_id_Reset: |
| 356 | /* Reset request */ |
| 357 | ranap_free_reseties(&message->msg.resetIEs); |
| 358 | break; |
| 359 | case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */ |
| 360 | ranap_free_overloadies(&message->msg.overloadIEs); |
| 361 | break; |
| 362 | case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */ |
| 363 | ranap_free_errorindicationies(&message->msg.errorIndicationIEs); |
| 364 | break; |
| 365 | case RANAP_ProcedureCode_id_ResetResource: /* request */ |
| 366 | ranap_free_resetresourceies(&message->msg.resetResourceIEs); |
| 367 | break; |
| 368 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 369 | ranap_free_informationtransferindicationies(&message->msg.informationTransferIndicationIEs); |
| 370 | break; |
| 371 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 372 | ranap_free_directinformationtransferies(&message->msg.directInformationTransferIEs); |
| 373 | break; |
| 374 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 375 | ranap_free_uplinkinformationexchangerequesties(&message->msg.uplinkInformationExchangeRequestIEs); |
| 376 | break; |
| 377 | default: |
| 378 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 379 | "Procedure %s (CL, IM)\n", |
| 380 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 381 | break; |
| 382 | } |
| 383 | } |
| 384 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 385 | static int cn_ranap_rx_successful_msg_cl(void *ctx, RANAP_SuccessfulOutcome_t *imsg, |
| 386 | ranap_message *message) |
| 387 | { |
| 388 | int rc; |
| 389 | |
| 390 | message->procedureCode = imsg->procedureCode; |
| 391 | message->criticality = imsg->criticality; |
| 392 | |
| 393 | DEBUGP(DRANAP, "Rx CL SO (%s)\n", |
| 394 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 395 | |
| 396 | switch (imsg->procedureCode) { |
| 397 | case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */ |
| 398 | rc = ranap_decode_resetacknowledgeies(&message->msg.resetAcknowledgeIEs, &imsg->value); |
| 399 | break; |
| 400 | case RANAP_ProcedureCode_id_ResetResource: /* response */ |
| 401 | rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value); |
Daniel Willmann | 618f0f5 | 2016-01-07 14:11:01 +0100 | [diff] [blame] | 402 | break; |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 403 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 404 | rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value); |
| 405 | break; |
| 406 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 407 | rc = ranap_decode_informationtransferconfirmationies(&message->msg.informationTransferConfirmationIEs, &imsg->value); |
| 408 | break; |
| 409 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 410 | rc = ranap_decode_uplinkinformationexchangeresponseies(&message->msg.uplinkInformationExchangeResponseIEs, &imsg->value); |
| 411 | break; |
| 412 | default: |
| 413 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 414 | "Procedure %s (CL, SO) from RNC, ignoring\n", |
| 415 | get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| 416 | break; |
| 417 | } |
| 418 | } |
| 419 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 420 | static void cn_ranap_free_successful_msg_cl(ranap_message *message) |
| 421 | { |
| 422 | switch (message->procedureCode) { |
| 423 | case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */ |
| 424 | ranap_free_resetacknowledgeies(&message->msg.resetAcknowledgeIEs); |
| 425 | break; |
| 426 | case RANAP_ProcedureCode_id_ResetResource: /* response */ |
| 427 | ranap_free_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs); |
| 428 | break; |
| 429 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 430 | ranap_free_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs); |
| 431 | break; |
| 432 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 433 | ranap_free_informationtransferconfirmationies(&message->msg.informationTransferConfirmationIEs); |
| 434 | break; |
| 435 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 436 | ranap_free_uplinkinformationexchangeresponseies(&message->msg.uplinkInformationExchangeResponseIEs); |
| 437 | break; |
| 438 | default: |
| 439 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP " |
| 440 | "Procedure %s (CL, SO)\n", |
| 441 | get_value_string(ranap_procedure_code_vals, message->procedureCode)); |
| 442 | break; |
| 443 | } |
| 444 | } |
| 445 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 446 | static int _cn_ranap_rx_cl(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message) |
| 447 | { |
| 448 | int rc; |
| 449 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 450 | /* Extend _cn_ranap_free_cl as well when extending this function */ |
| 451 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 452 | switch (pdu->present) { |
| 453 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 454 | rc = cn_ranap_rx_initiating_msg_cl(ctx, &pdu->choice.initiatingMessage, |
| 455 | message); |
| 456 | break; |
| 457 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 458 | rc = cn_ranap_rx_successful_msg_cl(ctx, &pdu->choice.successfulOutcome, |
| 459 | message); |
| 460 | break; |
| 461 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 462 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
| 463 | "unsuccessful outcome procedure %s (CL) from RNC, ignoring\n", |
| 464 | get_value_string(ranap_procedure_code_vals, |
| 465 | pdu->choice.unsuccessfulOutcome.procedureCode)); |
| 466 | break; |
| 467 | default: |
| 468 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 469 | "presence %s (CL) from RNC, ignoring\n", |
| 470 | get_value_string(ranap_presence_vals, pdu->present)); |
| 471 | break; |
| 472 | } |
| 473 | } |
| 474 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 475 | static void _cn_ranap_free_cl(ranap_message *message) |
| 476 | { |
| 477 | switch (message->direction) { |
| 478 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 479 | cn_ranap_free_initiating_msg_cl(message); |
| 480 | break; |
| 481 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 482 | cn_ranap_free_successful_msg_cl(message); |
| 483 | break; |
| 484 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 485 | LOGP(DRANAP, LOGL_NOTICE, "Not freeing unsupported RANAP " |
| 486 | "unsuccessful outcome procedure from RNC\n"); |
| 487 | break; |
| 488 | default: |
| 489 | LOGP(DRANAP, LOGL_NOTICE, "Suspicious RANAP " |
| 490 | "presence %s (CL) from RNC, ignoring\n", message->direction); |
| 491 | break; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | /* receive a connection-less RANAP message and call |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 496 | * cn_ranap_handle_co() with the resulting ranap_message struct */ |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 497 | 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] | 498 | { |
| 499 | RANAP_RANAP_PDU_t *pdu = NULL; |
| 500 | ranap_message message; |
| 501 | asn_dec_rval_t dec_ret; |
| 502 | int rc; |
| 503 | |
| 504 | memset(&message, 0, sizeof(message)); |
| 505 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 506 | dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| 507 | data, len, 0, 0); |
| 508 | if (dec_ret.code != RC_OK) { |
| 509 | LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
| 510 | return rc; |
| 511 | } |
| 512 | |
| 513 | message.direction = pdu->present; |
| 514 | |
| 515 | rc = _cn_ranap_rx_cl(ctx, pdu, &message); |
| 516 | |
| 517 | if (rc == 0) |
Harald Welte | 8fa5d55 | 2016-01-05 15:01:53 +0100 | [diff] [blame] | 518 | (*cb)(ctx, &message); |
Harald Welte | 4928797 | 2015-12-29 19:00:35 +0100 | [diff] [blame] | 519 | else |
| 520 | 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] | 521 | |
Daniel Willmann | c35b298 | 2016-01-07 14:13:49 +0100 | [diff] [blame] | 522 | /* Free the asn1 structs in message */ |
| 523 | _cn_ranap_free_cl(&message); |
| 524 | |
Harald Welte | 3cfa450 | 2015-12-25 15:33:41 +0100 | [diff] [blame] | 525 | ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu); |
| 526 | |
| 527 | return rc; |
| 528 | } |