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Leonardo Bonati
2021-12-08 20:17:46 +00:00
commit 60dffad583
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102
setup/e2mgr/E2Manager/converters/x2apPdu_asn1_unpacker.go Normal file
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//
// Copyright 2019 AT&T Intellectual Property
// Copyright 2019 Nokia
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// 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.
// This source code is part of the near-RT RIC (RAN Intelligent Controller)
// platform project (RICP).
package converters
// #cgo CFLAGS: -I../3rdparty/asn1codec/inc/ -I../3rdparty/asn1codec/e2ap_engine/
// #cgo LDFLAGS: -L ../3rdparty/asn1codec/lib/ -L../3rdparty/asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
// #include <asn1codec_utils.h>
// #include <x2setup_request_wrapper.h>
import "C"
import (
"e2mgr/logger"
"fmt"
"github.com/pkg/errors"
"unsafe"
)
type X2PduRefinedResponse struct {
PduPrint string
}
//func unpackX2apPduUPer(logger *logger.Logger, allocationBufferSize int, packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*C.E2AP_PDU_t, error) {
// pdu := C.new_pdu(C.ulong(allocationBufferSize))
//
// if pdu == nil {
// return nil, errors.New("allocation failure (pdu)")
// }
//
// logger.Debugf("#x2apPdu_asn1_unpacker.unpackX2apPduUPer - Packed pdu(%d):%x", packedBufferSize, packedBuf)
//
// errBuf := make([]C.char, maxMessageBufferSize)
// 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) {
// return nil, errors.New(fmt.Sprintf("unpacking error: %s", C.GoString(&errBuf[0])))
// }
//
// if logger.DebugEnabled() {
// C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
// logger.Debugf("#x2apPdu_asn1_unpacker.unpackX2apPduUPer - PDU: %v packed size:%d", C.GoString(&errBuf[0]), packedBufferSize)
// }
//
// return pdu, nil
//}
func UnpackX2apPdu(logger *logger.Logger, allocationBufferSize int, packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*C.E2AP_PDU_t, error) {
pdu := C.new_pdu(C.ulong(allocationBufferSize))
if pdu == nil {
return nil, errors.New("allocation failure (pdu)")
}
logger.Infof("#x2apPdu_asn1_unpacker.UnpackX2apPdu - Packed pdu(%d):%x", packedBufferSize, packedBuf)
errBuf := make([]C.char, maxMessageBufferSize)
if !C.per_unpack_pdu(pdu, C.ulong(packedBufferSize), (*C.uchar)(unsafe.Pointer(&packedBuf[0])), C.ulong(len(errBuf)), &errBuf[0]) {
return nil, errors.New(fmt.Sprintf("unpacking error: %s", C.GoString(&errBuf[0])))
}
if logger.DebugEnabled() {
C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
logger.Debugf("#x2apPdu_asn1_unpacker.UnpackX2apPdu - PDU: %v packed size:%d", C.GoString(&errBuf[0]), packedBufferSize)
}
return pdu, nil
}
func UnpackX2apPduAndRefine(logger *logger.Logger, allocationBufferSize int, packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*X2PduRefinedResponse, error) {
pdu, err := UnpackX2apPdu(logger, allocationBufferSize, packedBufferSize, packedBuf, maxMessageBufferSize)
if err != nil {
return nil, err
}
defer C.delete_pdu(pdu)
var refinedResponse = ""
if logger.DebugEnabled() {
buf := make([]C.char, 16*maxMessageBufferSize)
C.asn1_pdu_printer(pdu, C.size_t(len(buf)), &buf[0])
refinedResponse = C.GoString(&buf[0])
}
return &X2PduRefinedResponse{PduPrint: refinedResponse}, nil
}