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ahriFrame.go
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/
ahriFrame.go
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package core
import (
"bytes"
)
type AhriFrame []byte
/*
+---------------+------------+------+----+---------+-------------+----------------+
| protocol flag | frame type | from | to | conn No | payload len | payload |
+---------------+------------+------+----+---------+-------------+----------------+
| 1 | 1 | 2 | 2 | 8 | 2 | variable<=2032 |
+---------------+------------+------+----+---------+-------------+----------------+
| 0 | 1 | 2 | 4 | 6 | 14 | 16 |
+---------------+------------+------+----+---------+-------------+----------------+
*/
func (frame AhriFrame) frameType() byte {
return frame[1]
}
func (frame AhriFrame) setFrameType(frameType byte) {
frame[1] = frameType
}
func (frame AhriFrame) from() string {
var buf bytes.Buffer
for _, v := range frame[2:4] {
if v == 0 {
break
}
buf.WriteByte(v)
}
return buf.String()
}
func (frame AhriFrame) setFrom(from string) {
source := []byte(from)
target := frame[2:4]
for i := range target {
target[i] = 0
}
for i, v := range source {
if i == 2 {
break
}
target[i] = v
}
}
func (frame AhriFrame) to() string {
var buf bytes.Buffer
for _, v := range frame[4:6] {
if v == 0 {
break
}
buf.WriteByte(v)
}
return buf.String()
}
func (frame AhriFrame) setTo(to string) {
source := []byte(to)
target := frame[4:6]
for i := range target {
target[i] = 0
}
for i, v := range source {
if i == 2 {
break
}
target[i] = v
}
}
func (frame AhriFrame) connId() uint64 {
return BytesToUint64(frame[6:14])
}
func (frame AhriFrame) setConnId(connId uint64) {
copy(frame[6:14], Uint64ToBytes(connId))
}
func (frame AhriFrame) setPayloadLen(payloadLen uint16) {
copy(frame[14:16], Uint16ToBytes(payloadLen))
}
func (frame AhriFrame) payloadLen() uint16 {
return BytesToUint16(frame[14:16])
}
func (frame AhriFrame) payload() []byte {
return frame[AfpHeaderLen : AfpHeaderLen+BytesToUint16(frame[14:16])]
}
func (frame AhriFrame) setPayload(payload []byte) AhriFrame {
payloadLen := uint16(len(payload))
copy(frame[14:16], Uint16ToBytes(payloadLen))
copy(frame[AfpHeaderLen:AfpHeaderLen+payloadLen], payload)
return frame[0 : AfpHeaderLen+payloadLen]
}
func (frame AhriFrame) free() {
if frame == nil || cap(frame) < AfpFrameMaxLen {
return
}
//There must be a type conversion here, otherwise an error will be encountered when call "pool.Get().([]byte)"
ByteArrPool.Put([]byte(frame))
}
func NewAhriFrame(source []byte) AhriFrame {
buf := ByteArrPool.Get()
copy(buf, source)
return buf[0:len(source)]
}