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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
/*
* 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) {
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);
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);
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);
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);
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);
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);
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);
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);
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) {
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);
free(res.buffer);
break;
case S1AP_ProcedureCode_id_PathSwitchRequest:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
free(res.buffer);
break;
case S1AP_ProcedureCode_id_E_RABModificationIndication:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
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) {
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);
free(res.buffer);
break;
case S1AP_ProcedureCode_id_PathSwitchRequest:
res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_S1AP_S1AP_PDU, pdu);
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;
}