1 /*******************************************************************************
3 * Copyright (c) 2019 AT&T Intellectual Property.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 *******************************************************************************/
20 // #cgo CFLAGS: -I../asn1codec/inc/ -I../asn1codec/e2ap_engine/
21 // #cgo LDFLAGS: -L ../asn1codec/lib/ -L../asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
22 // #include <asn1codec_utils.h>
23 // #include <x2setup_request_wrapper.h>
27 "github.com/pkg/errors"
34 ShortMacro_eNB_ID = 18
40 var PackedEndcX2setupRequest []byte
41 var PackedX2setupRequest []byte
42 var PackedEndcX2setupRequestAsString string
43 var PackedX2setupRequestAsString string
45 /*The Ric Id is the combination of pLMNId and ENBId*/
49 var ricFlag = []byte{0xbb, 0xbc, 0xcc} /*pLMNId [3]bytes*/
51 func preparePackedEndcX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
52 packedBuf := make([]byte, maxAsn1PackedBufferSize)
53 errBuf := make([]C.char, maxAsn1CodecMessageBufferSize)
54 packedBufSize := C.ulong(len(packedBuf))
57 if !C.build_pack_endc_x2setup_request(
58 (*C.uchar)(unsafe.Pointer(&pLMNId[0])) /*pLMN_Identity*/,
59 (*C.uchar)(unsafe.Pointer(&eNB_Id[0])),
61 (*C.uchar)(unsafe.Pointer(&ricFlag[0])) /*pLMN_Identity*/,
63 (*C.uchar)(unsafe.Pointer(&packedBuf[0])),
66 return nil, "", errors.New(fmt.Sprintf("packing error: %s", C.GoString(&errBuf[0])))
69 pdu := C.new_pdu(C.size_t(1)) //TODO: change signature
70 defer C.delete_pdu(pdu)
71 if C.per_unpack_pdu(pdu, packedBufSize, (*C.uchar)(unsafe.Pointer(&packedBuf[0])), C.size_t(len(errBuf)), &errBuf[0]) {
72 C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
73 pduAsString = C.GoString(&errBuf[0])
76 return packedBuf[:packedBufSize], pduAsString, nil
79 func preparePackedX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
80 packedBuf := make([]byte, maxAsn1PackedBufferSize)
81 errBuf := make([]C.char, maxAsn1CodecMessageBufferSize)
82 packedBufSize := C.ulong(len(packedBuf))
85 if !C.build_pack_x2setup_request(
86 (*C.uchar)(unsafe.Pointer(&pLMNId[0])) /*pLMN_Identity*/,
87 (*C.uchar)(unsafe.Pointer(&eNB_Id[0])),
89 (*C.uchar)(unsafe.Pointer(&ricFlag[0])) /*pLMN_Identity*/,
91 (*C.uchar)(unsafe.Pointer(&packedBuf[0])),
94 return nil, "", errors.New(fmt.Sprintf("packing error: %s", C.GoString(&errBuf[0])))
97 pdu := C.new_pdu(C.size_t(1)) //TODO: change signature
98 defer C.delete_pdu(pdu)
99 if C.per_unpack_pdu(pdu, packedBufSize, (*C.uchar)(unsafe.Pointer(&packedBuf[0])), C.size_t(len(errBuf)), &errBuf[0]) {
100 C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
101 pduAsString = C.GoString(&errBuf[0])
103 return packedBuf[:packedBufSize], pduAsString, nil
106 //Expected value in RIC_ID = pLMN_Identity-eNB_ID/<eNB_ID size in bits>
107 //<6 hex digits>-<6 or 8 hex digits>/<18|20|21|28>
108 //Each byte is represented by two hex digits, the value in the lowest byte of the eNB_ID must be assigned to the lowest bits
109 //For example, to get the value of ffffeab/28 the last byte must be 0x0b, not 0xb0 (-ffffea0b/28).
110 func parseRicID(ricId string) error {
111 if _, err := fmt.Sscanf(ricId, "%6x-%8x/%2d", &pLMNId, &eNBId, &eNBIdBitqty); err != nil {
112 return fmt.Errorf("unable to extract the value of %s: %s", EnvRicId, err)
116 return fmt.Errorf("invalid value for %s, len(pLMNId:%v) != 3", EnvRicId, pLMNId)
120 return fmt.Errorf("invalid value for %s, len(eNBId:%v) != 3 or 4", EnvRicId, eNBId)
123 if eNBIdBitqty != ShortMacro_eNB_ID && eNBIdBitqty != Macro_eNB_ID && eNBIdBitqty != LongMacro_eNB_ID && eNBIdBitqty != Home_eNB_ID {
124 return fmt.Errorf("invalid value for %s, eNBIdBitqty: %d", EnvRicId, eNBIdBitqty)
132 ricId := os.Getenv(EnvRicId)
133 //ricId="bbbccc-ffff0e/20"
134 //ricId="bbbccc-abcd0e/20"
135 if err = parseRicID(ricId); err != nil {
139 PackedEndcX2setupRequest, PackedEndcX2setupRequestAsString, err = preparePackedEndcX2SetupRequest(MaxAsn1PackedBufferSize, MaxAsn1CodecMessageBufferSize, pLMNId, eNBId, eNBIdBitqty, ricFlag)
143 PackedX2setupRequest, PackedX2setupRequestAsString, err = preparePackedX2SetupRequest(MaxAsn1PackedBufferSize, MaxAsn1CodecMessageBufferSize, pLMNId, eNBId, eNBIdBitqty, ricFlag)