Update dependencies

vendor/github.com/mdlayher/genetlink/message.go

@@ -0,0 +1,61 @@
+package genetlink
+
+import "errors"
+
+// errInvalidMessage is returned when a Message is malformed.
+var errInvalidMessage = errors.New("generic netlink message is invalid or too short")
+
+// A Header is a generic netlink header. A Header is sent and received with
+// each generic netlink message to indicate metadata regarding a Message.
+type Header struct {
+	// Command specifies a command to issue to netlink.
+	Command uint8
+
+	// Version specifies the version of a command to use.
+	Version uint8
+}
+
+// headerLen is the length of a Header.
+const headerLen = 4 // unix.GENL_HDRLEN
+
+// A Message is a generic netlink message. It contains a Header and an
+// arbitrary byte payload, which may be decoded using information from the
+// Header.
+//
+// Data is encoded using the native endianness of the host system. Use
+// the netlink.AttributeDecoder and netlink.AttributeEncoder types to decode
+// and encode data.
+type Message struct {
+	Header Header
+	Data   []byte
+}
+
+// MarshalBinary marshals a Message into a byte slice.
+func (m Message) MarshalBinary() ([]byte, error) {
+	b := make([]byte, headerLen)
+
+	b[0] = m.Header.Command
+	b[1] = m.Header.Version
+
+	// b[2] and b[3] are padding bytes and set to zero
+
+	return append(b, m.Data...), nil
+}
+
+// UnmarshalBinary unmarshals the contents of a byte slice into a Message.
+func (m *Message) UnmarshalBinary(b []byte) error {
+	if len(b) < headerLen {
+		return errInvalidMessage
+	}
+
+	// Don't allow reserved pad bytes to be set
+	if b[2] != 0 || b[3] != 0 {
+		return errInvalidMessage
+	}
+
+	m.Header.Command = b[0]
+	m.Header.Version = b[1]
+
+	m.Data = b[4:]
+	return nil
+}