diff options
| -rw-r--r-- | src/tests/ranap_common_cn.c | 303 | ||||
| -rw-r--r-- | src/tests/ranap_common_cn.h | 17 |
2 files changed, 320 insertions, 0 deletions
diff --git a/src/tests/ranap_common_cn.c b/src/tests/ranap_common_cn.c new file mode 100644 index 0000000..a26df03 --- /dev/null +++ b/src/tests/ranap_common_cn.c @@ -0,0 +1,303 @@ +/* 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 "cn_ranap_common.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 CL 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_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; + 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)); + + memset(pdu, 0, sizeof(*pdu)); + 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); + + 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)); + + memset(pdu, 0, sizeof(*pdu)); + 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); + + ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu); + + return rc; +} diff --git a/src/tests/ranap_common_cn.h b/src/tests/ranap_common_cn.h new file mode 100644 index 0000000..38d2384 --- /dev/null +++ b/src/tests/ranap_common_cn.h @@ -0,0 +1,17 @@ +#pragma once + +#include <stdint.h> + +#include "ranap_common.h" +#include "ranap_ies_defs.h" + +/* call-back functions to be provided by actual core network node */ +int cn_ranap_handle_co(void *ctx, ranap_message *message); +int cn_ranap_handle_cl(void *ctx, ranap_message *message); + + +/* receive a connections-liess RANAP message */ +int cn_ranap_rx_cl(void *ctx, uint8_t *data, size_t len); + +/* receive a connection-oriented RANAP message */ +int cn_ranap_rx_co(void *ctx, uint8_t *data, size_t len); |