1 files changed, 47 insertions, 0 deletions
diff --git a/vendor/github.com/pion/sctp/error_cause_header.go b/vendor/github.com/pion/sctp/error_cause_header.go
new file mode 100644
index 0000000..1ad6e1d
--- /dev/null
+++ b/vendor/github.com/pion/sctp/error_cause_header.go
@@ -0,0 +1,47 @@
+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()
+}