553 lines
19 KiB
C
553 lines
19 KiB
C
/* RANAP interface for a core-network node */
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/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/ranap/ranap_common.h>
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#include <osmocom/ranap/ranap_common_cn.h>
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#include <osmocom/ranap/ranap_ies_defs.h>
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#define DRANAP _ranap_DRANAP
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static int cn_ranap_rx_initiating_msg_co(void *ctx, RANAP_InitiatingMessage_t *imsg,
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ranap_message *message)
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{
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int rc = 0;
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message->procedureCode = imsg->procedureCode;
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message->criticality = imsg->criticality;
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DEBUGP(DRANAP, "Rx CO IM (%s)\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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switch (imsg->procedureCode) {
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case RANAP_ProcedureCode_id_InitialUE_Message:
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rc = ranap_decode_initialue_messageies(&message->msg.initialUE_MessageIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_DirectTransfer:
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rc = ranap_decode_directtransferies(&message->msg.directTransferIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_RAB_ReleaseRequest:
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/* RNC requests the release of RAB */
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rc = ranap_decode_rab_releaserequesties(&message->msg.raB_ReleaseRequestIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_Iu_ReleaseRequest:
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/* RNC requests the release of Iu */
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rc = ranap_decode_iu_releaserequesties(&message->msg.iu_ReleaseRequestIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_ErrorIndication:
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rc = ranap_decode_errorindicationies(&message->msg.errorIndicationIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_RAB_ModifyRequest:
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rc = ranap_decode_rab_modifyrequesties(&message->msg.raB_ModifyRequestIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_SecurityModeControl:
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/* FIXME this is not a message received by CN (used by hnb-test) */
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/* Only an RNC will receive a Security Mode Control as
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* Initiating Message, in other words: only hnb-test. */
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rc = ranap_decode_securitymodecommandies(&message->msg.securityModeCommandIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_Iu_Release:
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/* FIXME this is not a message received by CN (used by hnb-test) */
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rc = ranap_decode_iu_releasecommandies(&message->msg.iu_ReleaseCommandIEs, &imsg->value);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
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"Procedure %s (CO, IM) from RNC, ignoring\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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rc = -1;
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break;
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}
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return rc;
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}
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static void cn_ranap_free_initiating_msg_co(ranap_message *message)
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{
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switch (message->procedureCode) {
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case RANAP_ProcedureCode_id_InitialUE_Message:
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ranap_free_initialue_messageies(&message->msg.initialUE_MessageIEs);
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break;
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case RANAP_ProcedureCode_id_DirectTransfer:
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ranap_free_directtransferies(&message->msg.directTransferIEs);
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break;
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case RANAP_ProcedureCode_id_RAB_ReleaseRequest:
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/* RNC requests the release of RAB */
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ranap_free_rab_releaserequesties(&message->msg.raB_ReleaseRequestIEs);
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break;
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case RANAP_ProcedureCode_id_Iu_ReleaseRequest:
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/* RNC requests the release of Iu */
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ranap_free_iu_releaserequesties(&message->msg.iu_ReleaseRequestIEs);
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break;
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case RANAP_ProcedureCode_id_ErrorIndication:
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ranap_free_errorindicationies(&message->msg.errorIndicationIEs);
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break;
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case RANAP_ProcedureCode_id_RAB_ModifyRequest:
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ranap_free_rab_modifyrequesties(&message->msg.raB_ModifyRequestIEs);
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break;
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case RANAP_ProcedureCode_id_SecurityModeControl:
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/* FIXME this is not a message received by CN (used by hnb-test) */
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/* Only an RNC will receive a Security Mode Control as
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* Initiating Message, in other words: only hnb-test. */
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ranap_free_securitymodecommandies(&message->msg.securityModeCommandIEs);
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break;
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case RANAP_ProcedureCode_id_Iu_Release:
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/* FIXME this is not a message received by CN (used by hnb-test) */
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ranap_free_iu_releasecommandies(&message->msg.iu_ReleaseCommandIEs);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP "
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"Procedure %s (CO, IM) from RNC\n",
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get_value_string(ranap_procedure_code_vals, message->procedureCode));
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break;
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}
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}
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static int cn_ranap_rx_successful_msg_co(void *ctx, RANAP_SuccessfulOutcome_t *imsg,
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ranap_message *message)
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{
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int rc = 0;
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message->procedureCode = imsg->procedureCode;
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message->criticality = imsg->criticality;
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DEBUGP(DRANAP, "Rx CO SO (%s)\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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switch (imsg->procedureCode) {
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case RANAP_ProcedureCode_id_RAB_Assignment:
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/* RAB assignment response */
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rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_SecurityModeControl:
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/* Security Mode Complete */
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rc = ranap_decode_securitymodecompleteies(&message->msg.securityModeCompleteIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_Iu_Release:
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/* Iu release Complete; confirmation of CN-initiated release */
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rc = ranap_decode_iu_releasecompleteies(&message->msg.iu_ReleaseCompleteIEs, &imsg->value);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
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"Procedure %s (SO) from RNC, ignoring\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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rc = -1;
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break;
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}
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return rc;
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}
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static void cn_ranap_free_successful_msg_co(ranap_message *message)
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{
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switch (message->procedureCode) {
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case RANAP_ProcedureCode_id_RAB_Assignment:
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/* RAB assignment response */
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ranap_free_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs);
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break;
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case RANAP_ProcedureCode_id_SecurityModeControl:
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/* Security Mode Complete */
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ranap_free_securitymodecompleteies(&message->msg.securityModeCompleteIEs);
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break;
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case RANAP_ProcedureCode_id_Iu_Release:
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/* Iu release Complete; confirmation of CN-initiated release */
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ranap_free_iu_releasecompleteies(&message->msg.iu_ReleaseCompleteIEs);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP "
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"Procedure %s (SO) from RNC\n",
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get_value_string(ranap_procedure_code_vals, message->procedureCode));
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break;
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}
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}
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static int cn_ranap_rx_outcome_msg_co(void *ctx, RANAP_Outcome_t *imsg,
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ranap_message *message)
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{
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int rc = 0;
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message->procedureCode = imsg->procedureCode;
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message->criticality = imsg->criticality;
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DEBUGP(DRANAP, "Rx CO O (%s)\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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switch (imsg->procedureCode) {
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case RANAP_ProcedureCode_id_RAB_Assignment:
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/* RAB assignment response */
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rc = ranap_decode_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs, &imsg->value);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
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"Procedure %s (O) from RNC, ignoring\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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rc = -1;
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break;
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}
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return rc;
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}
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static void cn_ranap_free_outcome_msg_co(ranap_message *message)
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{
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switch (message->procedureCode) {
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case RANAP_ProcedureCode_id_RAB_Assignment:
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/* RAB assignment response */
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ranap_free_rab_assignmentresponseies(&message->msg.raB_AssignmentResponseIEs);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP "
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"Procedure %s (O) from RNC\n",
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get_value_string(ranap_procedure_code_vals, message->procedureCode));
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break;
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}
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}
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static int _cn_ranap_rx_co(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message)
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{
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int rc = 0;
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switch (pdu->present) {
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case RANAP_RANAP_PDU_PR_initiatingMessage:
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rc = cn_ranap_rx_initiating_msg_co(ctx, &pdu->choice.initiatingMessage, message);
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break;
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case RANAP_RANAP_PDU_PR_successfulOutcome:
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rc = cn_ranap_rx_successful_msg_co(ctx, &pdu->choice.successfulOutcome, message);
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break;
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case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
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LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP "
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"unsuccessful outcome procedure %s (CO) from RNC, ignoring\n",
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get_value_string(ranap_procedure_code_vals,
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pdu->choice.unsuccessfulOutcome.procedureCode));
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rc = -1;
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break;
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case RANAP_RANAP_PDU_PR_outcome:
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rc = cn_ranap_rx_outcome_msg_co(ctx, &pdu->choice.outcome, message);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
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"presence %s (CO) from RNC, ignoring\n",
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get_value_string(ranap_presence_vals, pdu->present));
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rc = -1;
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break;
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}
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return rc;
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}
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static void _cn_ranap_free_co(ranap_message *message)
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{
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switch (message->direction) {
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case RANAP_RANAP_PDU_PR_initiatingMessage:
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cn_ranap_free_initiating_msg_co(message);
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break;
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case RANAP_RANAP_PDU_PR_successfulOutcome:
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cn_ranap_free_successful_msg_co(message);
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break;
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case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
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LOGP(DRANAP, LOGL_NOTICE, "Not freeing unsupported RANAP "
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"unsuccessful outcome procedure (CO) from RNC\n");
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break;
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case RANAP_RANAP_PDU_PR_outcome:
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cn_ranap_free_outcome_msg_co(message);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
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"presence %s (CO) from RNC, ignoring\n",
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get_value_string(ranap_presence_vals, message->direction));
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break;
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}
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}
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/* receive a connection-oriented RANAP message and call
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* cn_ranap_handle_co() with the resulting ranap_message struct */
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int ranap_cn_rx_co(ranap_handle_cb cb, void *ctx, uint8_t *data, size_t len)
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{
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RANAP_RANAP_PDU_t *pdu = NULL;
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ranap_message message;
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asn_dec_rval_t dec_ret;
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int rc;
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memset(&message, 0, sizeof(message));
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dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu,
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data, len, 0, 0);
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if (dec_ret.code != RC_OK) {
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LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n");
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return -1;
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}
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message.direction = pdu->present;
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rc = _cn_ranap_rx_co(ctx, pdu, &message);
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if (rc == 0)
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(*cb)(ctx, &message);
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else
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LOGP(DRANAP, LOGL_ERROR, "Not calling cn_ranap_handle_co() due to rc=%d\n", rc);
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/* Free the asn1 structs in message */
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_cn_ranap_free_co(&message);
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ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu);
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return rc;
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}
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static int cn_ranap_rx_initiating_msg_cl(void *ctx, RANAP_InitiatingMessage_t *imsg,
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ranap_message *message)
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{
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int rc = 0;
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message->procedureCode = imsg->procedureCode;
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message->criticality = imsg->criticality;
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DEBUGP(DRANAP, "Rx CL IM (%s)\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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switch (imsg->procedureCode) {
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case RANAP_ProcedureCode_id_Reset:
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/* Reset request */
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rc = ranap_decode_reseties(&message->msg.resetIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */
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rc = ranap_decode_overloadies(&message->msg.overloadIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */
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rc = ranap_decode_errorindicationies(&message->msg.errorIndicationIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_ResetResource: /* request */
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rc = ranap_decode_resetresourceies(&message->msg.resetResourceIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_InformationTransfer:
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rc = ranap_decode_informationtransferindicationies(&message->msg.informationTransferIndicationIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_DirectInformationTransfer:
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rc = ranap_decode_directinformationtransferies(&message->msg.directInformationTransferIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_UplinkInformationExchange:
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rc = ranap_decode_uplinkinformationexchangerequesties(&message->msg.uplinkInformationExchangeRequestIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_Paging:
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/* FIXME this is not a message received by CN (used by hnb-test) */
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rc = ranap_decode_pagingies(&message->msg.pagingIEs, &imsg->value);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
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"Procedure %s (CL, IM) from RNC, ignoring\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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break;
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}
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return rc;
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}
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static void cn_ranap_free_initiating_msg_cl(ranap_message *message)
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{
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switch (message->procedureCode) {
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case RANAP_ProcedureCode_id_Reset:
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/* Reset request */
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ranap_free_reseties(&message->msg.resetIEs);
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break;
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case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */
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ranap_free_overloadies(&message->msg.overloadIEs);
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break;
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case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */
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ranap_free_errorindicationies(&message->msg.errorIndicationIEs);
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break;
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case RANAP_ProcedureCode_id_ResetResource: /* request */
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ranap_free_resetresourceies(&message->msg.resetResourceIEs);
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break;
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case RANAP_ProcedureCode_id_InformationTransfer:
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ranap_free_informationtransferindicationies(&message->msg.informationTransferIndicationIEs);
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break;
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case RANAP_ProcedureCode_id_DirectInformationTransfer:
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ranap_free_directinformationtransferies(&message->msg.directInformationTransferIEs);
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break;
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case RANAP_ProcedureCode_id_UplinkInformationExchange:
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ranap_free_uplinkinformationexchangerequesties(&message->msg.uplinkInformationExchangeRequestIEs);
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break;
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case RANAP_ProcedureCode_id_Paging:
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/* FIXME this is not a message received by CN (used by hnb-test) */
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ranap_free_pagingies(&message->msg.pagingIEs);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP "
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"Procedure %s (CL, IM)\n",
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get_value_string(ranap_procedure_code_vals, message->procedureCode));
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break;
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}
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}
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static int cn_ranap_rx_successful_msg_cl(void *ctx, RANAP_SuccessfulOutcome_t *imsg,
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ranap_message *message)
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{
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int rc = 0;
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message->procedureCode = imsg->procedureCode;
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message->criticality = imsg->criticality;
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DEBUGP(DRANAP, "Rx CL SO (%s)\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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switch (imsg->procedureCode) {
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case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */
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rc = ranap_decode_resetacknowledgeies(&message->msg.resetAcknowledgeIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_ResetResource: /* response */
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rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_InformationTransfer:
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rc = ranap_decode_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_DirectInformationTransfer:
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rc = ranap_decode_informationtransferconfirmationies(&message->msg.informationTransferConfirmationIEs, &imsg->value);
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break;
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case RANAP_ProcedureCode_id_UplinkInformationExchange:
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rc = ranap_decode_uplinkinformationexchangeresponseies(&message->msg.uplinkInformationExchangeResponseIEs, &imsg->value);
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break;
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default:
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LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
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"Procedure %s (CL, SO) from RNC, ignoring\n",
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get_value_string(ranap_procedure_code_vals, imsg->procedureCode));
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break;
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}
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return rc;
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}
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|
|
static void cn_ranap_free_successful_msg_cl(ranap_message *message)
|
|
{
|
|
switch (message->procedureCode) {
|
|
case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */
|
|
ranap_free_resetacknowledgeies(&message->msg.resetAcknowledgeIEs);
|
|
break;
|
|
case RANAP_ProcedureCode_id_ResetResource: /* response */
|
|
ranap_free_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs);
|
|
break;
|
|
case RANAP_ProcedureCode_id_InformationTransfer:
|
|
ranap_free_resetresourceacknowledgeies(&message->msg.resetResourceAcknowledgeIEs);
|
|
break;
|
|
case RANAP_ProcedureCode_id_DirectInformationTransfer:
|
|
ranap_free_informationtransferconfirmationies(&message->msg.informationTransferConfirmationIEs);
|
|
break;
|
|
case RANAP_ProcedureCode_id_UplinkInformationExchange:
|
|
ranap_free_uplinkinformationexchangeresponseies(&message->msg.uplinkInformationExchangeResponseIEs);
|
|
break;
|
|
default:
|
|
LOGP(DRANAP, LOGL_NOTICE, "Not freeing suspicious RANAP "
|
|
"Procedure %s (CL, SO)\n",
|
|
get_value_string(ranap_procedure_code_vals, message->procedureCode));
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int _cn_ranap_rx_cl(void *ctx, RANAP_RANAP_PDU_t *pdu, ranap_message *message)
|
|
{
|
|
int rc = 0;
|
|
|
|
/* Extend _cn_ranap_free_cl as well when extending this function */
|
|
|
|
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;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void _cn_ranap_free_cl(ranap_message *message)
|
|
{
|
|
switch (message->direction) {
|
|
case RANAP_RANAP_PDU_PR_initiatingMessage:
|
|
cn_ranap_free_initiating_msg_cl(message);
|
|
break;
|
|
case RANAP_RANAP_PDU_PR_successfulOutcome:
|
|
cn_ranap_free_successful_msg_cl(message);
|
|
break;
|
|
case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
|
|
LOGP(DRANAP, LOGL_NOTICE, "Not freeing unsupported RANAP "
|
|
"unsuccessful outcome procedure from RNC\n");
|
|
break;
|
|
default:
|
|
LOGP(DRANAP, LOGL_NOTICE, "Suspicious RANAP "
|
|
"presence %d (CL) from RNC, ignoring\n", message->direction);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* receive a connection-less RANAP message and call
|
|
* cn_ranap_handle_co() with the resulting ranap_message struct */
|
|
int ranap_cn_rx_cl(ranap_handle_cb cb, 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 -1;
|
|
}
|
|
|
|
message.direction = pdu->present;
|
|
|
|
rc = _cn_ranap_rx_cl(ctx, pdu, &message);
|
|
|
|
if (rc == 0)
|
|
(*cb)(ctx, &message);
|
|
else
|
|
LOGP(DRANAP, LOGL_ERROR, "Not calling cn_ranap_handle_cl() due to rc=%d\n", rc);
|
|
|
|
/* Free the asn1 structs in message */
|
|
_cn_ranap_free_cl(&message);
|
|
|
|
ASN_STRUCT_FREE(asn_DEF_RANAP_RANAP_PDU, pdu);
|
|
|
|
return rc;
|
|
}
|