maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
a247907d3a62e85d4bf14c5ca2fff756e470c5ad
openairinterface5g/openair3/S1AP/s1ap_eNB_decoder.c
T
Bi-Ruei, Chiu a247907d3a Use an un-official community collaboration version of asn1c 
1. It's no need to modify LTE-RRC's ASN.1 file for enabling option group
   feature in generate_asn1.
2. It's no need to patch the C header files generated from
   LTE-RRC/S1AP/X2AP's ASN.1 in fix_asn1.
3. It's no need to pre-process S1AP/X2AP's ASN.1 for enabling information
   object class feature by asn1tostruct.py.

This commit requires an un-official version of asn1c which are
collaboration of asn1c community members and `build_helper` is modified
in this commit accordingly :

  https://github.com/brchiu/asn1c/tree/velichkov_s1ap_plus_option_group

This asn1c can also convert ASN.1 of 5G NR RRC (38.331, v15.1.0) and
generate C files with -findirect-choice command line option without
tweaking ASN.1 file.

Examples for how to use this asn1c for S1AP are in S1AP files, e.g.
s1ap_eNB_nas_procedures.c and s1ap_eNB_handler.c.

There is an modified openair-cn (based on tag 0.5.0) with this new asn1c at :

  https://github.com/brchiu/openair-cn/tree/new-asn1c

Basic S1AP interaction and data transfer operation between OAI eNB and
this modified openair-cn has been tested.

Note: Community version of asn1c is keeping evolved to provide better usage.
2018-07-13 10:04:46 +08:00

243 lines
9.9 KiB
C
Raw Blame History

/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file s1ap_eNB_decoder.c
* \brief s1ap pdu decode procedures for eNB
* \author Sebastien ROUX and Navid Nikaein
* \email navid.nikaein@eurecom.fr
* \date 2013 - 2015
* \version 0.1
*/
#include <stdio.h>
#include "assertions.h"
#include "intertask_interface.h"
#include "s1ap_common.h"
#include "s1ap_eNB_decoder.h"
static int s1ap_eNB_decode_initiating_message(S1AP_S1AP_PDU_t *pdu)
{
MessageDef *message_p;
MessagesIds message_id;
asn_encode_to_new_buffer_result_t res = { NULL, {0, NULL, NULL} };
DevAssert(pdu != NULL);
switch(pdu->choice.initiatingMessage.procedureCode) {
case S1AP_ProcedureCode_id_downlinkNASTransport:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_DOWNLINK_NAS_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_downlink_nas_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_downlink_nas_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
break;
case S1AP_ProcedureCode_id_InitialContextSetup:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_INITIAL_CONTEXT_SETUP_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_initial_context_setup_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_initial_context_setup_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
break;
case S1AP_ProcedureCode_id_UEContextRelease:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_UE_CONTEXT_RELEASE_COMMAND_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_ue_context_release_command_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_ue_context_release_command_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
break;
case S1AP_ProcedureCode_id_Paging:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_PAGING_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_paging_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_paging_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
S1AP_INFO("Paging initiating message\n");
free(res.buffer);
break;
case S1AP_ProcedureCode_id_E_RABSetup:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_E_RAB_SETUP_REQUEST_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_e_rab_setup_request_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_e_rab_setup_request_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
S1AP_INFO("E_RABSetup initiating message\n");
break;
case S1AP_ProcedureCode_id_E_RABModify:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_E_RAB_MODIFY_REQUEST_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_e_rab_modify_request_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_e_rab_modify_request_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
S1AP_INFO("E_RABModify initiating message\n");
break;
case S1AP_ProcedureCode_id_E_RABRelease:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_E_RAB_RELEASE_REQUEST_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_e_rab_release_request_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_e_rab_release_request_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
S1AP_INFO("TODO E_RABRelease initiating message\n");
break;
case S1AP_ProcedureCode_id_ErrorIndication:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_ERROR_INDICATION_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id,
res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_error_indication_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_error_indication_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
S1AP_INFO("TODO ErrorIndication initiating message\n");
break;
default:
S1AP_ERROR("Unknown procedure ID (%d) for initiating message\n",
(int)pdu->choice.initiatingMessage.procedureCode);
AssertFatal( 0, "Unknown procedure ID (%d) for initiating message\n",
(int)pdu->choice.initiatingMessage.procedureCode);
return -1;
}
return 0;
}
static int s1ap_eNB_decode_successful_outcome(S1AP_S1AP_PDU_t *pdu)
{
MessageDef *message_p;
MessagesIds message_id;
asn_encode_to_new_buffer_result_t res = { NULL, {0, NULL, NULL} };
DevAssert(pdu != NULL);
switch(pdu->choice.successfulOutcome.procedureCode) {
case S1AP_ProcedureCode_id_S1Setup:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_S1_SETUP_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id, res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_s1_setup_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_s1_setup_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
break;
default:
S1AP_ERROR("Unknown procedure ID (%d) for successfull outcome message\n",
(int)pdu->choice.successfulOutcome.procedureCode);
return -1;
}
return 0;
}
static int s1ap_eNB_decode_unsuccessful_outcome(S1AP_S1AP_PDU_t *pdu)
{
MessageDef *message_p;
MessagesIds message_id;
asn_encode_to_new_buffer_result_t res = { NULL, {0, NULL, NULL} };
DevAssert(pdu != NULL);
switch(pdu->choice.unsuccessfulOutcome.procedureCode) {
case S1AP_ProcedureCode_id_S1Setup:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
message_id = S1AP_S1_SETUP_LOG;
message_p = itti_alloc_new_message_sized(TASK_S1AP, message_id, res.result.encoded + sizeof (IttiMsgText));
message_p->ittiMsg.s1ap_s1_setup_log.size = res.result.encoded;
memcpy(&message_p->ittiMsg.s1ap_s1_setup_log.text, res.buffer, res.result.encoded);
itti_send_msg_to_task(TASK_UNKNOWN, INSTANCE_DEFAULT, message_p);
free(res.buffer);
break;
default:
S1AP_ERROR("Unknown procedure ID (%d) for unsuccessfull outcome message\n",
(int)pdu->choice.unsuccessfulOutcome.procedureCode);
return -1;
}
return 0;
}
int s1ap_eNB_decode_pdu(S1AP_S1AP_PDU_t *pdu, const uint8_t *const buffer,
const uint32_t length)
{
asn_dec_rval_t dec_ret;
DevAssert(pdu != NULL);
DevAssert(buffer != NULL);
dec_ret = aper_decode(NULL,
&asn_DEF_S1AP_S1AP_PDU,
(void **)&pdu,
buffer,
length,
0,
0);
if (dec_ret.code != RC_OK) {
S1AP_ERROR("Failed to decode pdu\n");
return -1;
}
switch(pdu->present) {
case S1AP_S1AP_PDU_PR_initiatingMessage:
return s1ap_eNB_decode_initiating_message(pdu);
case S1AP_S1AP_PDU_PR_successfulOutcome:
return s1ap_eNB_decode_successful_outcome(pdu);
case S1AP_S1AP_PDU_PR_unsuccessfulOutcome:
return s1ap_eNB_decode_unsuccessful_outcome(pdu);
default:
S1AP_DEBUG("Unknown presence (%d) or not implemented\n", (int)pdu->present);
break;
}
return -1;
}
Reference in New Issue View Git Blame Copy Permalink