Newer
Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/*
* 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 f1ap_handlers.c
* \brief f1ap messages handlers
* \author EURECOM/NTUST
* \date 2018
* \version 0.1
* \company Eurecom
* \email: navid.nikaein@eurecom.fr, bing-kai.hong@eurecom.fr
* \note
* \warning
*/
#include "f1ap_common.h"
#include "f1ap_cu_interface_management.h"
#include "f1ap_du_interface_management.h"
#include "f1ap_cu_rrc_message_transfer.h"
#include "f1ap_du_rrc_message_transfer.h"
#include "f1ap_cu_ue_context_management.h"
#include "f1ap_du_ue_context_management.h"
#include "f1ap_du_paging.h"
/* Handlers matrix. Only f1 related procedure present here */
static const f1ap_message_processing_t f1ap_messages_processing[][3] = {
{0, 0, 0}, /* Reset */
{CU_handle_F1_SETUP_REQUEST, DU_handle_F1_SETUP_RESPONSE, DU_handle_F1_SETUP_FAILURE}, /* F1Setup */
{0, 0, 0}, /* ErrorIndication */
{0, 0, 0}, /* gNBDUConfigurationUpdate */
{DU_handle_gNB_CU_CONFIGURATION_UPDATE,
CU_handle_gNB_CU_CONFIGURATION_UPDATE_ACKNOWLEDGE,
CU_handle_gNB_CU_CONFIGURATION_UPDATE_FAILURE}, /* gNBCUConfigurationUpdate */
{DU_handle_UE_CONTEXT_SETUP_REQUEST, CU_handle_UE_CONTEXT_SETUP_RESPONSE, 0}, /* UEContextSetup */
{DU_handle_UE_CONTEXT_RELEASE_COMMAND, CU_handle_UE_CONTEXT_RELEASE_COMPLETE, 0}, /* UEContextRelease */
{DU_handle_UE_CONTEXT_MODIFICATION_REQUEST, CU_handle_UE_CONTEXT_MODIFICATION_RESPONSE, 0}, /* UEContextModification */
{CU_handle_UE_CONTEXT_MODIFICATION_REQUIRED, DU_handle_UE_CONTEXT_MODIFICATION_CONFIRM, DU_handle_UE_CONTEXT_MODIFICATION_REFUSE}, /* UEContextModificationRequired */
{0, 0, 0}, /* UEMobilityCommand */
{CU_handle_UE_CONTEXT_RELEASE_REQUEST, 0, 0}, /* UEContextReleaseRequest */
{CU_handle_INITIAL_UL_RRC_MESSAGE_TRANSFER, 0, 0}, /* InitialULRRCMessageTransfer */
{DU_handle_DL_RRC_MESSAGE_TRANSFER, 0, 0}, /* DLRRCMessageTransfer */
{CU_handle_UL_RRC_MESSAGE_TRANSFER, 0, 0}, /* ULRRCMessageTransfer */
{0, 0, 0}, /* privateMessage */
{0, 0, 0}, /* UEInactivityNotification */
{0, 0, 0}, /* GNBDUResourceCoordination */
{0, 0, 0}, /* SystemInformationDeliveryCommand */
{DU_handle_Paging, 0, 0}, /* Paging */
{0, 0, 0}, /* Notify */
{0, 0, 0}, /* WriteReplaceWarning */
{0, 0, 0}, /* PWSCancel */
{0, 0, 0}, /* PWSRestartIndication */
{0, 0, 0}, /* PWSFailureIndication */
};
const char *f1ap_direction2String(int f1ap_dir) {
static const char *const f1ap_direction_String[] = {
"", /* Nothing */
"Initiating message", /* initiating message */
"Successfull outcome", /* successfull outcome */
"UnSuccessfull outcome", /* successfull outcome */
};
return(f1ap_direction_String[f1ap_dir]);
}
static F1AP_F1AP_PDU_t *f1ap_decode_pdu(const uint8_t *const buffer, uint32_t length)
{
DevAssert(buffer != NULL);
asn_codec_ctx_t st = {.max_stack_size = 100 * 1000};
F1AP_F1AP_PDU_t *pdu = NULL;
asn_dec_rval_t dec_ret = aper_decode(&st, &asn_DEF_F1AP_F1AP_PDU, (void **)&pdu, buffer, length, 0, 0);
if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
LOG_E(F1AP, "----------------- ASN1 DECODER PRINT START----------------- \n");
xer_fprint(stdout, &asn_DEF_F1AP_F1AP_PDU, pdu);
LOG_E(F1AP, "----------------- ASN1 DECODER PRINT END ----------------- \n");
}
return dec_ret.code == RC_OK ? pdu : NULL;
}
int f1ap_handle_message(instance_t instance,
uint32_t assoc_id,
int32_t stream,
const uint8_t *const data,
const uint32_t data_length)
{
DevAssert(data != NULL);
F1AP_F1AP_PDU_t *pdu = f1ap_decode_pdu(data, data_length);
if (pdu == NULL) {
LOG_E(F1AP, "Failed to decode PDU\n");
return -1;
}
/* Checking procedure Code and direction of message */
if (pdu->choice.initiatingMessage->procedureCode >= sizeof(f1ap_messages_processing) / (3 * sizeof(f1ap_message_processing_t))
|| (pdu->present > F1AP_F1AP_PDU_PR_unsuccessfulOutcome)) {
LOG_E(F1AP,
"[SCTP %d] Either procedureCode %ld or direction %d exceed expected\n",
assoc_id,
pdu->choice.initiatingMessage->procedureCode,
pdu->present);
ASN_STRUCT_FREE(asn_DEF_F1AP_F1AP_PDU, pdu);
return -1;
}
int ret;
if (f1ap_messages_processing[pdu->choice.initiatingMessage->procedureCode][pdu->present - 1] == NULL) {
// No handler present. This can mean not implemented or no procedure for eNB (wrong direction).
LOG_E(F1AP,
"[SCTP %d] No handler for procedureCode %ld in %s\n",
assoc_id,
pdu->choice.initiatingMessage->procedureCode,
f1ap_direction2String(pdu->present - 1));
ret=-1;
} else {
/* Calling the right handler */
LOG_D(F1AP, "Calling handler with instance %ld\n",instance);
ret = (*f1ap_messages_processing[pdu->choice.initiatingMessage->procedureCode][pdu->present - 1])(instance,
assoc_id,
stream,
pdu);
}
ASN_STRUCT_FREE(asn_DEF_F1AP_F1AP_PDU, pdu);
return ret;
}