/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
OpenAirInterface is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenAirInterface 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see <http://www.gnu.org/licenses/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@eurecom.fr
Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
*******************************************************************************/
/*! \file s1ap_eNB_decoder.c
* \brief s1ap pdu decode procedures for eNB
* \author Sebastien ROUX <sebastien.roux@eurecom.fr>
* \date 2013
* \version 0.1
*/
#include <stdio.h>
#include "assertions.h"
#include "intertask_interface.h"
#include "s1ap_common.h"
#include "s1ap_ies_defs.h"
#include "s1ap_eNB_decoder.h"
static int s1ap_eNB_decode_initiating_message(s1ap_message *message,
S1ap_InitiatingMessage_t *initiating_p)
{
int ret = -1;
MessageDef *message_p;
char *message_string = NULL;
size_t message_string_size;
MessagesIds message_id;
DevAssert(initiating_p != NULL);
message_string = calloc(10000, sizeof(char));
s1ap_string_total_size = 0;
message->procedureCode = initiating_p->procedureCode;
message->criticality = initiating_p->criticality;
switch(initiating_p->procedureCode)
{
case S1ap_ProcedureCode_id_downlinkNASTransport:
ret = s1ap_decode_s1ap_downlinknastransporties(
&message->msg.s1ap_DownlinkNASTransportIEs,
&initiating_p->value);
s1ap_xer_print_s1ap_downlinknastransport(s1ap_xer__print2sp,
message_string,
message);
message_id = S1AP_DOWNLINK_NAS_LOG;
message_string_size = strlen(message_string);
message_p = itti_alloc_new_message_sized(TASK_S1AP,
message_id,
message_string_size + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_downlink_nas_log.size = message_string_size;
memcpy(&message_p->ittiMsg.s1ap_downlink_nas_log.text, message_string, message_string_size);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(message_string);
break;
case S1ap_ProcedureCode_id_InitialContextSetup:
ret = s1ap_decode_s1ap_initialcontextsetuprequesties(
&message->msg.s1ap_InitialContextSetupRequestIEs, &initiating_p->value);
s1ap_xer_print_s1ap_initialcontextsetuprequest(s1ap_xer__print2sp, message_string, message);
message_id = S1AP_INITIAL_CONTEXT_SETUP_LOG;
message_string_size = strlen(message_string);
message_p = itti_alloc_new_message_sized(TASK_S1AP,
message_id,
message_string_size + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_initial_context_setup_log.size = message_string_size;
memcpy(&message_p->ittiMsg.s1ap_initial_context_setup_log.text, message_string, message_string_size);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(message_string);
break;
case S1ap_ProcedureCode_id_UEContextRelease:
ret = s1ap_decode_s1ap_uecontextreleasecommandies(
&message->msg.s1ap_UEContextReleaseCommandIEs, &initiating_p->value);
s1ap_xer_print_s1ap_uecontextreleasecommand(s1ap_xer__print2sp, message_string, message);
message_id = S1AP_UE_CONTEXT_RELEASE_COMMAND_LOG;
message_string_size = strlen(message_string);
message_p = itti_alloc_new_message_sized(TASK_S1AP,
message_id,
message_string_size + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_ue_context_release_command_log.size = message_string_size;
memcpy(&message_p->ittiMsg.s1ap_ue_context_release_command_log.text, message_string, message_string_size);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(message_string);
break;
case S1ap_ProcedureCode_id_Paging:
ret = s1ap_decode_s1ap_pagingies(
&message->msg.s1ap_PagingIEs, &initiating_p->value);
s1ap_xer_print_s1ap_paging(s1ap_xer__print2sp, message_string, message);
S1AP_ERROR("TODO Paging initiating message\n");
free(message_string);
break;
default:
S1AP_ERROR("Unknown procedure ID (%d) for initiating message\n",
(int)initiating_p->procedureCode);
AssertFatal( 0 , "Unknown procedure ID (%d) for initiating message\n",
(int)initiating_p->procedureCode);
return -1;
}
return ret;
}
static int s1ap_eNB_decode_successful_outcome(s1ap_message *message,
S1ap_SuccessfulOutcome_t *successfullOutcome_p)
{
int ret = -1;
MessageDef *message_p;
char *message_string = NULL;
size_t message_string_size;
MessagesIds message_id;
DevAssert(successfullOutcome_p != NULL);
message_string = malloc(sizeof(char) * 10000);
s1ap_string_total_size = 0;
message->procedureCode = successfullOutcome_p->procedureCode;
message->criticality = successfullOutcome_p->criticality;
switch(successfullOutcome_p->procedureCode)
{
case S1ap_ProcedureCode_id_S1Setup:
ret = s1ap_decode_s1ap_s1setupresponseies(
&message->msg.s1ap_S1SetupResponseIEs, &successfullOutcome_p->value);
s1ap_xer_print_s1ap_s1setupresponse(s1ap_xer__print2sp, message_string, message);
message_id = S1AP_S1_SETUP_LOG;
break;
default:
S1AP_ERROR("Unknown procedure ID (%d) for successfull outcome message\n",
(int)successfullOutcome_p->procedureCode);
return -1;
}
message_string_size = strlen(message_string);
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id, message_string_size + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_s1_setup_log.size = message_string_size;
memcpy(&message_p->ittiMsg.s1ap_s1_setup_log.text, message_string, message_string_size);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(message_string);
return ret;
}
static int s1ap_eNB_decode_unsuccessful_outcome(s1ap_message *message,
S1ap_UnsuccessfulOutcome_t *unSuccessfullOutcome_p)
{
int ret = -1;
DevAssert(unSuccessfullOutcome_p != NULL);
message->procedureCode = unSuccessfullOutcome_p->procedureCode;
message->criticality = unSuccessfullOutcome_p->criticality;
switch(unSuccessfullOutcome_p->procedureCode) {
case S1ap_ProcedureCode_id_S1Setup:
return s1ap_decode_s1ap_s1setupfailureies(
&message->msg.s1ap_S1SetupFailureIEs, &unSuccessfullOutcome_p->value);
default:
S1AP_ERROR("Unknown procedure ID (%d) for unsuccessfull outcome message\n",
(int)unSuccessfullOutcome_p->procedureCode);
break;
}
return ret;
}
int s1ap_eNB_decode_pdu(s1ap_message *message, const uint8_t * const buffer,
const uint32_t length)
{
S1AP_PDU_t pdu;
S1AP_PDU_t *pdu_p = &pdu;
asn_dec_rval_t dec_ret;
DevAssert(buffer != NULL);
memset((void *)pdu_p, 0, sizeof(S1AP_PDU_t));
dec_ret = aper_decode(NULL,
&asn_DEF_S1AP_PDU,
(void **)&pdu_p,
buffer,
length,
0,
0);
if (dec_ret.code != RC_OK) {
S1AP_ERROR("Failed to decode pdu\n");
return -1;
}
message->direction = pdu_p->present;
switch(pdu_p->present) {
case S1AP_PDU_PR_initiatingMessage:
return s1ap_eNB_decode_initiating_message(message,
&pdu_p->choice.initiatingMessage);
case S1AP_PDU_PR_successfulOutcome:
return s1ap_eNB_decode_successful_outcome(message,
&pdu_p->choice.successfulOutcome);
case S1AP_PDU_PR_unsuccessfulOutcome:
return s1ap_eNB_decode_unsuccessful_outcome(message,
&pdu_p->choice.unsuccessfulOutcome);
default:
S1AP_DEBUG("Unknown presence (%d) or not implemented\n", (int)pdu_p->present);
break;
}
return -1;
}