/
GBR.go
62 lines (46 loc) · 1.42 KB
/
GBR.go
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package pfcpType
import (
"bytes"
"encoding/binary"
"fmt"
"math/bits"
)
type GBR struct {
ULGBR uint64 // 40-bit data
DLGBR uint64 // 40-bit data
}
func (g *GBR) MarshalBinary() ([]byte, error) {
buf := &bytes.Buffer{}
if bits.Len64(g.ULGBR) > 40 {
return nil, fmt.Errorf("UL GBR shall not be greater than 40 bits binary integer")
}
if bits.Len64(g.DLGBR) > 40 {
return nil, fmt.Errorf("DL GBR shall not be greater than 40 bits binary integer")
}
gbrBytes := make([]byte, 8)
binary.BigEndian.PutUint64(gbrBytes, g.ULGBR)
if err := binary.Write(buf, binary.BigEndian, gbrBytes[3:]); err != nil {
return nil, fmt.Errorf("write ULGBR fail: %s", err)
}
binary.BigEndian.PutUint64(gbrBytes, g.DLGBR)
if err := binary.Write(buf, binary.BigEndian, gbrBytes[3:]); err != nil {
return nil, fmt.Errorf("write DLGBR fail: %s", err)
}
return buf.Bytes(), nil
}
func (g *GBR) UnmarshalBinary(data []byte) error {
buf := bytes.NewBuffer(data)
GBRBytes := make([]byte, 5)
uint64Byte := make([]byte, 8)
if err := binary.Read(buf, binary.BigEndian, GBRBytes); err != nil {
return fmt.Errorf("read UL GBR fail: %s", err)
}
copy(uint64Byte[3:], GBRBytes)
g.ULGBR = binary.BigEndian.Uint64(uint64Byte)
if err := binary.Read(buf, binary.BigEndian, GBRBytes); err != nil {
return fmt.Errorf("read DL GBR fail: %s", err)
}
copy(uint64Byte[3:], GBRBytes)
g.DLGBR = binary.BigEndian.Uint64(uint64Byte)
return nil
}