2 * Copyright (c) 2019 AT&T Intellectual Property.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * This source code is part of the near-RT RIC (RAN Intelligent Controller)
19 * platform project (RICP).
24 // #cgo CFLAGS: -I../3rdparty/asn1codec/inc/ -I../3rdparty/asn1codec/e2ap_engine/
25 // #cgo LDFLAGS: -L ../3rdparty/asn1codec/lib/ -L../3rdparty/asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
26 // #include <asn1codec_utils.h>
27 // #include <x2setup_request_wrapper.h>
31 "github.com/pkg/errors"
38 ShortMacro_eNB_ID = 18
44 var PackedEndcX2setupRequest []byte
45 var PackedX2setupRequest []byte
46 var PackedEndcX2setupRequestAsString string
47 var PackedX2setupRequestAsString string
49 /*The Ric Id is the combination of pLMNId and ENBId*/
53 var ricFlag = []byte{0xbb, 0xbc, 0xcc} /*pLMNId [3]bytes*/
55 func preparePackedEndcX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
56 packedBuf := make([]byte, maxAsn1PackedBufferSize)
57 errBuf := make([]C.char, maxAsn1CodecMessageBufferSize)
58 packedBufSize := C.ulong(len(packedBuf))
61 if !C.build_pack_endc_x2setup_request(
62 (*C.uchar)(unsafe.Pointer(&pLMNId[0])) /*pLMN_Identity*/,
63 (*C.uchar)(unsafe.Pointer(&eNB_Id[0])),
65 (*C.uchar)(unsafe.Pointer(&ricFlag[0])) /*pLMN_Identity*/,
67 (*C.uchar)(unsafe.Pointer(&packedBuf[0])),
70 return nil, "", errors.New(fmt.Sprintf("packing error: %s", C.GoString(&errBuf[0])))
73 pdu := C.new_pdu(C.size_t(1)) //TODO: change signature
74 defer C.delete_pdu(pdu)
75 if C.per_unpack_pdu(pdu, packedBufSize, (*C.uchar)(unsafe.Pointer(&packedBuf[0])), C.size_t(len(errBuf)), &errBuf[0]) {
76 C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
77 pduAsString = C.GoString(&errBuf[0])
80 return packedBuf[:packedBufSize], pduAsString, nil
83 func preparePackedX2SetupRequest(maxAsn1PackedBufferSize int, maxAsn1CodecMessageBufferSize int, pLMNId []byte, eNB_Id []byte /*18, 20, 21, 28 bits length*/, bitqty uint, ricFlag []byte) ([]byte, string, error) {
84 packedBuf := make([]byte, maxAsn1PackedBufferSize)
85 errBuf := make([]C.char, maxAsn1CodecMessageBufferSize)
86 packedBufSize := C.ulong(len(packedBuf))
89 if !C.build_pack_x2setup_request(
90 (*C.uchar)(unsafe.Pointer(&pLMNId[0])) /*pLMN_Identity*/,
91 (*C.uchar)(unsafe.Pointer(&eNB_Id[0])),
93 (*C.uchar)(unsafe.Pointer(&ricFlag[0])) /*pLMN_Identity*/,
95 (*C.uchar)(unsafe.Pointer(&packedBuf[0])),
98 return nil, "", errors.New(fmt.Sprintf("packing error: %s", C.GoString(&errBuf[0])))
101 pdu := C.new_pdu(C.size_t(1)) //TODO: change signature
102 defer C.delete_pdu(pdu)
103 if C.per_unpack_pdu(pdu, packedBufSize, (*C.uchar)(unsafe.Pointer(&packedBuf[0])), C.size_t(len(errBuf)), &errBuf[0]) {
104 C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
105 pduAsString = C.GoString(&errBuf[0])
107 return packedBuf[:packedBufSize], pduAsString, nil
110 //Expected value in RIC_ID = pLMN_Identity-eNB_ID/<eNB_ID size in bits>
111 //<6 hex digits>-<6 or 8 hex digits>/<18|20|21|28>
112 //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
113 //For example, to get the value of ffffeab/28 the last byte must be 0x0b, not 0xb0 (-ffffea0b/28).
114 func parseRicID(ricId string) error {
115 if _, err := fmt.Sscanf(ricId, "%6x-%8x/%2d", &pLMNId, &eNBId, &eNBIdBitqty); err != nil {
116 return fmt.Errorf("unable to extract the value of %s: %s", EnvRicId, err)
120 return fmt.Errorf("invalid value for %s, len(pLMNId:%v) != 3", EnvRicId, pLMNId)
124 return fmt.Errorf("invalid value for %s, len(eNBId:%v) != 3 or 4", EnvRicId, eNBId)
127 if eNBIdBitqty != ShortMacro_eNB_ID && eNBIdBitqty != Macro_eNB_ID && eNBIdBitqty != LongMacro_eNB_ID && eNBIdBitqty != Home_eNB_ID {
128 return fmt.Errorf("invalid value for %s, eNBIdBitqty: %d", EnvRicId, eNBIdBitqty)
136 ricId := os.Getenv(EnvRicId)
137 //ricId="bbbccc-ffff0e/20"
138 //ricId="bbbccc-abcd0e/20"
139 if err = parseRicID(ricId); err != nil {
143 PackedEndcX2setupRequest, PackedEndcX2setupRequestAsString, err = preparePackedEndcX2SetupRequest(MaxAsn1PackedBufferSize, MaxAsn1CodecMessageBufferSize, pLMNId, eNBId, eNBIdBitqty, ricFlag)
147 PackedX2setupRequest, PackedX2setupRequestAsString, err = preparePackedX2SetupRequest(MaxAsn1PackedBufferSize, MaxAsn1CodecMessageBufferSize, pLMNId, eNBId, eNBIdBitqty, ricFlag)