48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
|
package sctp
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/binary"
|
||
|
|
)
|
||
|
|
|
||
|
|
// errorCauseHeader represents the shared header that is shared by all error causes
|
||
|
|
type errorCauseHeader struct {
|
||
|
|
code errorCauseCode
|
||
|
|
len uint16
|
||
|
|
raw []byte
|
||
|
|
}
|
||
|
|
|
||
|
|
const (
|
||
|
|
errorCauseHeaderLength = 4
|
||
|
|
)
|
||
|
|
|
||
|
|
func (e *errorCauseHeader) marshal() ([]byte, error) {
|
||
|
|
e.len = uint16(len(e.raw)) + uint16(errorCauseHeaderLength)
|
||
|
|
raw := make([]byte, e.len)
|
||
|
|
binary.BigEndian.PutUint16(raw[0:], uint16(e.code))
|
||
|
|
binary.BigEndian.PutUint16(raw[2:], e.len)
|
||
|
|
copy(raw[errorCauseHeaderLength:], e.raw)
|
||
|
|
|
||
|
|
return raw, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *errorCauseHeader) unmarshal(raw []byte) error {
|
||
|
|
e.code = errorCauseCode(binary.BigEndian.Uint16(raw[0:]))
|
||
|
|
e.len = binary.BigEndian.Uint16(raw[2:])
|
||
|
|
valueLength := e.len - errorCauseHeaderLength
|
||
|
|
e.raw = raw[errorCauseHeaderLength : errorCauseHeaderLength+valueLength]
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *errorCauseHeader) length() uint16 {
|
||
|
|
return e.len
|
||
|
|
}
|
||
|
|
|
||
|
|
func (e *errorCauseHeader) errorCauseCode() errorCauseCode {
|
||
|
|
return e.code
|
||
|
|
}
|
||
|
|
|
||
|
|
// String makes errorCauseHeader printable
|
||
|
|
func (e errorCauseHeader) String() string {
|
||
|
|
return e.code.String()
|
||
|
|
}
|