forked from superkkt/cherry
/
echo.go
83 lines (70 loc) · 1.7 KB
/
echo.go
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/*
* Cherry - An OpenFlow Controller
*
* Copyright (C) 2015 Samjung Data Service, Inc. All rights reserved.
* Kitae Kim <superkkt@sds.co.kr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package openflow
import (
"encoding"
)
type Echo interface {
Data() []byte
encoding.BinaryMarshaler
encoding.BinaryUnmarshaler
// Error() returns last error message
Error() error
Header
SetData(data []byte)
}
type EchoRequest interface {
Echo
}
type EchoReply interface {
Echo
}
type BaseEcho struct {
err error
Message
data []byte
}
func (r *BaseEcho) Data() []byte {
return r.data
}
func (r *BaseEcho) SetData(data []byte) {
if data == nil {
panic("data is nil")
}
r.data = data
}
func (r *BaseEcho) Error() error {
return r.err
}
func (r *BaseEcho) MarshalBinary() ([]byte, error) {
if r.err != nil {
return nil, r.err
}
r.SetPayload(r.data)
return r.Message.MarshalBinary()
}
func (r *BaseEcho) UnmarshalBinary(data []byte) error {
if err := r.Message.UnmarshalBinary(data); err != nil {
return err
}
r.data = r.Payload()
return nil
}