Sync from Azure to LF

[ric-plt/resource-status-manager.git] / RSM / converters / x2apPdu_asn1_unpacker.go

diff --git a/RSM/converters/x2apPdu_asn1_unpacker.go b/RSM/converters/x2apPdu_asn1_unpacker.go
new file mode 100644 (file)
index 0000000..0d49939
--- /dev/null
+++ b/RSM/converters/x2apPdu_asn1_unpacker.go
@@ -0,0 +1,80 @@
+//
+// 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.
+//
+
+package converters
+
+// #cgo CFLAGS: -I../asn1codec/inc/ -I../asn1codec/e2ap_engine/
+// #cgo LDFLAGS: -L ../asn1codec/lib/ -L../asn1codec/e2ap_engine/ -le2ap_codec -lasncodec
+// #include <asn1codec_utils.h>
+import "C"
+import (
+       "fmt"
+       "github.com/pkg/errors"
+       "rsm/logger"
+       "unsafe"
+)
+
+type Asn1PduUnpacker interface {
+       UnpackX2apPduAsString(packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (string, error)
+}
+
+type X2apPduUnpacker struct {
+       logger *logger.Logger
+
+}
+
+func NewX2apPduUnpacker(logger *logger.Logger) Asn1PduUnpacker {
+       return &X2apPduUnpacker{logger :logger}
+}
+
+func (r X2apPduUnpacker) UnpackX2apPdu(packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (*C.E2AP_PDU_t, error) {
+       pdu := C.new_pdu()
+
+       if pdu == nil {
+               return nil, errors.New("allocation failure (pdu)")
+       }
+
+       r.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 r.logger.DebugEnabled() {
+               C.asn1_pdu_printer(pdu, C.size_t(len(errBuf)), &errBuf[0])
+               r.logger.Debugf("#x2apPdu_asn1_unpacker.UnpackX2apPdu - PDU: %v  packed size:%d", C.GoString(&errBuf[0]), packedBufferSize)
+       }
+
+       return pdu, nil
+}
+
+func (r X2apPduUnpacker)UnpackX2apPduAsString(packedBufferSize int, packedBuf []byte, maxMessageBufferSize int) (string, error) {
+       pdu, err := r.UnpackX2apPdu(packedBufferSize, packedBuf, maxMessageBufferSize)
+       if err != nil {
+               return "", err
+       }
+
+       defer C.delete_pdu(pdu)
+
+       buf := make([]C.char, 16*maxMessageBufferSize)
+       C.asn1_pdu_printer(pdu, C.size_t(len(buf)), &buf[0])
+       return C.GoString(&buf[0]), nil
+}
+
+
+