| /* RANAP interface for a core-network node */ |
| |
| /* (C) 2015 by Harald Welte <laforge@gnumonks.org> |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <unistd.h> |
| #include <errno.h> |
| #include <string.h> |
| |
| #include <osmocom/core/utils.h> |
| #include <osmocom/core/logging.h> |
| |
| #include "ranap_common.h" |
| #include "ranap_ies_defs.h" |
| #include "ranap_common_cn.h" |
| |
| #include "hnbgw.h" |
| |
| static int cn_ranap_rx_initiating_msg_co(void *ctx, RANAP_InitiatingMessage_t *imsg, |
| ranap_message *message) |
| { |
| int rc = 0; |
| |
| message->procedureCode = imsg->procedureCode; |
| message->criticality = imsg->criticality; |
| |
| DEBUGP(DRANAP, "Rx CO IM (%s)\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| |
| switch (imsg->procedureCode) { |
| case RANAP_ProcedureCode_id_InitialUE_Message: |
| rc = ranap_decode_initialue_messageies(&message->msg.initialUE_MessageIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_DirectTransfer: |
| rc = ranap_decode_directtransferies(&message->msg.directTransferIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_RAB_ReleaseRequest: |
| /* RNC requests the release of RAB */ |
| rc = ranap_decode_rab_releaserequesties(&message->msg.raB_ReleaseRequestIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_Iu_ReleaseRequest: |
| /* RNC requests the release of Iu */ |
| rc = ranap_decode_iu_releaserequesties(&message->msg.iu_ReleaseRequestIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_ErrorIndication: |
| rc = ranap_decode_errorindicationies(&message->msg.errorIndicationIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_RAB_ModifyRequest: |
| rc = ranap_decode_rab_modifyrequesties(&message->msg.raB_ModifyRequestIEs, &imsg->value); |
| break; |
| default: |
| LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| "Procedure %s (CO, IM) from RNC, ignoring\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| rc = -1; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int cn_ranap_rx_successful_msg_co(void *ctx, RANAP_SuccessfulOutcome_t *imsg, |
| ranap_message *message) |
| { |
| int rc = 0; |
| |
| message->procedureCode = imsg->procedureCode; |
| message->criticality = imsg->criticality; |
| |
| DEBUGP(DRANAP, "Rx CO SO (%s)\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| |
| switch (imsg->procedureCode) { |
| case RANAP_ProcedureCode_id_RAB_Assignment: |
| /* RAB assignment response */ |
| rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_SecurityModeControl: |
| /* Security Mode Complete */ |
| rc = ranap_decode_securitymodecompleteies(&message->msg.securityModeCompleteIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_Iu_Release: |
| /* Iu release Complete; confirmation of CN-initiated release */ |
| rc = ranap_decode_iu_releasecompleteies(&message->msg.iu_ReleaseCompleteIEs, &imsg->value); |
| break; |
| default: |
| LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| "Procedure %s (SO) from RNC, ignoring\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| rc = -1; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int cn_ranap_rx_outcome_msg_co(void *ctx, RANAP_Outcome_t *imsg, |
| ranap_message *message) |
| { |
| int rc = 0; |
| |
| message->procedureCode = imsg->procedureCode; |
| message->criticality = imsg->criticality; |
| |
| DEBUGP(DRANAP, "Rx CO O (%s)\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| |
| switch (imsg->procedureCode) { |
| case RANAP_ProcedureCode_id_RAB_Assignment: |
| /* RAB assignment response */ |
| rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value); |
| break; |
| default: |
| LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| "Procedure %s (O) from RNC, ignoring\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| rc = -1; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int _cn_ranap_rx_co(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message) |
| { |
| int rc = 0; |
| |
| switch (pdu->present) { |
| case RANAP_RANAP_PDU_PR_initiatingMessage: |
| rc = cn_ranap_rx_initiating_msg_co(ctx, &pdu->choice.initiatingMessage, message); |
| break; |
| case RANAP_RANAP_PDU_PR_successfulOutcome: |
| rc = cn_ranap_rx_successful_msg_co(ctx, &pdu->choice.successfulOutcome, message); |
| break; |
| case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
| "unsuccessful outcome procedure %s (CO) from RNC, ignoring\n", |
| get_value_string(ranap_procedure_code_vals, |
| pdu->choice.unsuccessfulOutcome.procedureCode)); |
| rc = -1; |
| break; |
| case RANAP_RANAP_PDU_PR_outcome: |
| rc = cn_ranap_rx_outcome_msg_co(ctx, &pdu->choice.successfulOutcome, message); |
| break; |
| default: |
| LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| "presence %s (CO) from RNC, ignoring\n", |
| get_value_string(ranap_presence_vals, pdu->present)); |
| rc = -1; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /* receive a connection-oriented RANAP message and call |
| * cn_ranap_handle_co() with the resulting ranap_message struct */ |
| int cn_ranap_rx_co(void *ctx, uint8_t *data, size_t len) |
| { |
| RANAP_RANAP_PDU_t *pdu = NULL; |
| ranap_message message; |
| asn_dec_rval_t dec_ret; |
| int rc; |
| |
| memset(&message, 0, sizeof(message)); |
| |
| dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| data, len, 0, 0); |
| if (dec_ret.code != RC_OK) { |
| LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
| return rc; |
| } |
| |
| message.direction = pdu->present; |
| |
| rc = _cn_ranap_rx_co(ctx, pdu, &message); |
| |
| if (rc == 0) |
| cn_ranap_handle_co(ctx, &message); |
| else |
| LOGP(DRANAP, LOGL_ERROR, "Not calling cn_ranap_handle_co() due to rc=%d\n", rc); |
| |
| ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu); |
| |
| return rc; |
| } |
| |
| static int cn_ranap_rx_initiating_msg_cl(void *ctx, RANAP_InitiatingMessage_t *imsg, |
| ranap_message *message) |
| { |
| int rc; |
| |
| message->procedureCode = imsg->procedureCode; |
| message->criticality = imsg->criticality; |
| |
| DEBUGP(DRANAP, "Rx CL IM (%s)\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| |
| switch (imsg->procedureCode) { |
| case RANAP_ProcedureCode_id_Reset: |
| /* Reset request */ |
| rc = ranap_decode_reseties(&message->msg.resetIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */ |
| rc = ranap_decode_overloadies(&message->msg.overloadIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */ |
| rc = ranap_decode_errorindicationies(&message->msg.errorIndicationIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_ResetResource: /* request */ |
| rc = ranap_decode_resetresourceies(&message->msg.resetResourceIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_InformationTransfer: |
| rc = ranap_decode_informationtransferindicationies(&message->msg.informationTransferIndicationIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| rc = ranap_decode_directinformationtransferies(&message->msg.directInformationTransferIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| rc = ranap_decode_uplinkinformationexchangerequesties(&message->msg.uplinkInformationExchangeRequestIEs, &imsg->value); |
| break; |
| default: |
| LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| "Procedure %s (CL, IM) from RNC, ignoring\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| break; |
| } |
| } |
| |
| static int cn_ranap_rx_successful_msg_cl(void *ctx, RANAP_SuccessfulOutcome_t *imsg, |
| ranap_message *message) |
| { |
| int rc; |
| |
| message->procedureCode = imsg->procedureCode; |
| message->criticality = imsg->criticality; |
| |
| DEBUGP(DRANAP, "Rx CL SO (%s)\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| |
| switch (imsg->procedureCode) { |
| case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */ |
| rc = ranap_decode_resetacknowledgeies(&message->msg.resetAcknowledgeIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_ResetResource: /* response */ |
| rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value); |
| case RANAP_ProcedureCode_id_InformationTransfer: |
| rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| rc = ranap_decode_informationtransferconfirmationies(&message->msg.informationTransferConfirmationIEs, &imsg->value); |
| break; |
| case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| rc = ranap_decode_uplinkinformationexchangeresponseies(&message->msg.uplinkInformationExchangeResponseIEs, &imsg->value); |
| break; |
| default: |
| LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| "Procedure %s (CL, SO) from RNC, ignoring\n", |
| get_value_string(ranap_procedure_code_vals, imsg->procedureCode)); |
| break; |
| } |
| } |
| |
| static int _cn_ranap_rx_cl(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message) |
| { |
| int rc; |
| |
| switch (pdu->present) { |
| case RANAP_RANAP_PDU_PR_initiatingMessage: |
| rc = cn_ranap_rx_initiating_msg_cl(ctx, &pdu->choice.initiatingMessage, |
| message); |
| break; |
| case RANAP_RANAP_PDU_PR_successfulOutcome: |
| rc = cn_ranap_rx_successful_msg_cl(ctx, &pdu->choice.successfulOutcome, |
| message); |
| break; |
| case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
| "unsuccessful outcome procedure %s (CL) from RNC, ignoring\n", |
| get_value_string(ranap_procedure_code_vals, |
| pdu->choice.unsuccessfulOutcome.procedureCode)); |
| break; |
| default: |
| LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| "presence %s (CL) from RNC, ignoring\n", |
| get_value_string(ranap_presence_vals, pdu->present)); |
| break; |
| } |
| } |
| |
| /* receive a connection-oriented RANAP message and call |
| * cn_ranap_handle_co() with the resulting ranap_message struct */ |
| int cn_ranap_rx_cl(void *ctx, uint8_t *data, size_t len) |
| { |
| RANAP_RANAP_PDU_t *pdu = NULL; |
| ranap_message message; |
| asn_dec_rval_t dec_ret; |
| int rc; |
| |
| memset(&message, 0, sizeof(message)); |
| |
| dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| data, len, 0, 0); |
| if (dec_ret.code != RC_OK) { |
| LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
| return rc; |
| } |
| |
| message.direction = pdu->present; |
| |
| rc = _cn_ranap_rx_cl(ctx, pdu, &message); |
| |
| if (rc == 0) |
| cn_ranap_handle_cl(ctx, &message); |
| else |
| LOGP(DRANAP, LOGL_ERROR, "Not calling cn_ranap_handle_cl() due to rc=%d\n", rc); |
| |
| ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu); |
| |
| return rc; |
| } |