2 // Copyright 2019 AT&T Intellectual Property
3 // Copyright 2019 Nokia
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.
20 // #cgo CFLAGS: -I../3rdparty/asn1codec/inc/ -I../3rdparty/asn1codec/e2ap_engine/
21 // #cgo LDFLAGS: -L ../3rdparty/asn1codec/lib/ -L../3rdparty/asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
22 // #include <asn1codec_utils.h>
23 // #include <x2setup_request_wrapper.h>
28 "github.com/pkg/errors"
32 type X2PduRefinedResponse struct {
36 //func unpackX2apPduUPer(logger *logger.Logger, allocationBufferSize int, packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*C.E2AP_PDU_t, error) {
37 // pdu := C.new_pdu(C.ulong(allocationBufferSize))
40 // return nil, errors.New("allocation failure (pdu)")
43 // logger.Debugf("#x2apPdu_asn1_unpacker.unpackX2apPduUPer - Packed pdu(%d):%x", packedBufferSize, packedBuf)
45 // errBuf := make([]C.char, maxMessageBufferSize)
46 // if !C.unpack_pdu_aux(pdu, C.ulong(packedBufferSize), (*C.uchar)(unsafe.Pointer(&packedBuf[0])), C.ulong(len(errBuf)), &errBuf[0], C.ATS_UNALIGNED_BASIC_PER) {
47 // return nil, errors.New(fmt.Sprintf("unpacking error: %s", C.GoString(&errBuf[0])))
50 // if logger.DebugEnabled() {
51 // C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
52 // logger.Debugf("#x2apPdu_asn1_unpacker.unpackX2apPduUPer - PDU: %v packed size:%d", C.GoString(&errBuf[0]), packedBufferSize)
58 func UnpackX2apPdu(logger *logger.Logger, allocationBufferSize int, packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*C.E2AP_PDU_t, error) {
59 pdu := C.new_pdu(C.ulong(allocationBufferSize))
62 return nil, errors.New("allocation failure (pdu)")
65 logger.Infof("#x2apPdu_asn1_unpacker.UnpackX2apPdu - Packed pdu(%d):%x", packedBufferSize, packedBuf)
67 errBuf := make([]C.char, maxMessageBufferSize)
68 if !C.per_unpack_pdu(pdu, C.ulong(packedBufferSize), (*C.uchar)(unsafe.Pointer(&packedBuf[0])), C.ulong(len(errBuf)), &errBuf[0]) {
69 return nil, errors.New(fmt.Sprintf("unpacking error: %s", C.GoString(&errBuf[0])))
72 if logger.DebugEnabled() {
73 C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
74 logger.Debugf("#x2apPdu_asn1_unpacker.UnpackX2apPdu - PDU: %v packed size:%d", C.GoString(&errBuf[0]), packedBufferSize)
80 func UnpackX2apPduAndRefine(logger *logger.Logger, allocationBufferSize int, packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*X2PduRefinedResponse, error) {
81 pdu, err := UnpackX2apPdu(logger, allocationBufferSize, packedBufferSize, packedBuf, maxMessageBufferSize)
86 defer C.delete_pdu(pdu)
88 var refinedResponse = ""
89 if logger.DebugEnabled() {
90 buf := make([]C.char, 16*maxMessageBufferSize)
91 C.asn1_pdu_printer(pdu, C.size_t(len(buf)), &buf[0])
92 refinedResponse = C.GoString(&buf[0])
95 return &X2PduRefinedResponse{PduPrint: refinedResponse}, nil