optimize(all): drop lstnq & impl. orbyte

gold/head/packet.go

@@ -5,8 +5,11 @@ import (
 	"encoding/hex"
 	"errors"
 	"net"
+	"sync/atomic"
 
 	blake2b "github.com/fumiama/blake2b-simd"
+	"github.com/fumiama/orbyte"
+	"github.com/fumiama/orbyte/pbuf"
 	"github.com/sirupsen/logrus"
 
 	"github.com/fumiama/WireGold/config"
@@ -37,6 +40,8 @@ type Packet struct {
 	DstPort uint16
 	// Flags 高3位为标志(xDM)，低13位为分片偏移
 	Flags PacketFlags
+	// 记录还有多少字节未到达
+	rembytes int32
 	// Src 源 ip (ipv4)
 	Src net.IP
 	// Dst 目的 ip (ipv4)
@@ -48,82 +53,113 @@ type Packet struct {
 	// crc64 包头字段的 checksum 值，可以认为在一定时间内唯一 (现已更改算法为 md5 但名字未变)
 	crc64 uint64
 	// data 承载的数据
-	data []byte
+	data pbuf.Bytes
 	// Data 当前的偏移
 	a, b int
-	// 记录还有多少字节未到达
-	rembytes int
-	// 是否经由 helper.MakeBytes 创建 Data
-	buffered bool
 }
 
-// NewPacket 生成一个新包
-func NewPacket(proto uint8, srcPort uint16, dst net.IP, dstPort uint16, data []byte) (p *Packet) {
-	p = SelectPacket()
-	p.Proto = proto
-	p.TTL = 16
-	p.SrcPort = srcPort
-	p.DstPort = dstPort
-	p.Dst = dst
-	p.data = data
-	p.b = len(data)
+// NewPacketPartial 从一些预设参数生成一个新包
+func NewPacketPartial(
+	proto uint8, srcPort uint16,
+	dst net.IP, dstPort uint16,
+	data pbuf.Bytes,
+) (p *orbyte.Item[Packet]) {
+	p = selectPacket()
+	pp := p.Pointer()
+	pp.Proto = proto
+	pp.TTL = 16
+	pp.SrcPort = srcPort
+	pp.DstPort = dstPort
+	pp.Dst = dst
+	pp.data = data
+	pp.b = data.Len()
 	return
 }
 
-// Unmarshal 将 data 的数据解码到自身
-func (p *Packet) Unmarshal(data []byte) (complete bool, err error) {
+func ParsePacket(p Packet) *orbyte.Item[Packet] {
+	return packetPool.Parse(nil, p)
+}
+
+func ParsePacketHeader(data []byte) (p *orbyte.Item[Packet], err error) {
 	if len(data) < 60 {
 		err = ErrDataLenLT60
 		return
 	}
-	p.crc64 = CRC64(data)
-	if CalcCRC64(data) != p.crc64 {
+	p = selectPacket()
+	pp := p.Pointer()
+	pp.crc64 = CRC64(data)
+	if CalcCRC64(data) != pp.crc64 {
 		err = ErrBadCRCChecksum
 		return
 	}
 
+	pp.idxdatsz = binary.LittleEndian.Uint32(data[:4])
+	sz := pp.Len()
+	if config.ShowDebugLog {
+		logrus.Debugln("[packet] header data len", sz, "read data len", len(data))
+	}
+	pt := binary.LittleEndian.Uint16(data[4:6])
+	pp.Proto = uint8(pt)
+	pp.TTL = uint8(pt >> 8)
+	pp.SrcPort = binary.LittleEndian.Uint16(data[6:8])
+	pp.DstPort = binary.LittleEndian.Uint16(data[8:10])
+
+	flags := PacketFlags(binary.LittleEndian.Uint16(data[10:12]))
+	pp.Flags = flags
+	pp.Src = make(net.IP, 4)
+	copy(pp.Src, data[12:16])
+	pp.Dst = make(net.IP, 4)
+	copy(pp.Dst, data[16:20])
+	copy(pp.Hash[:], data[20:52])
+
+	switch {
+	case sz+PacketHeadLen == len(data):
+		pp.b = sz
+		pp.rembytes = -1
+	case pp.rembytes == 0:
+		pp.data = pbuf.NewBytes(sz)
+		pp.b = sz
+		pp.rembytes = int32(sz)
+	}
+
+	return
+}
+
+// ParseData 将 data 的数据解码到自身
+//
+// 必须先调用 ParsePacketHeader
+func (p *Packet) ParseData(data []byte) (complete bool) {
 	sz := p.Len()
-	if sz == 0 && len(p.data) == 0 {
-		p.idxdatsz = binary.LittleEndian.Uint32(data[:4])
-		sz = p.Len()
-		if sz+52 == len(data) {
-			p.data = data[52:]
-			p.b = len(p.data)
-			p.rembytes = 0
-		} else {
-			p.data = helper.MakeBytes(sz)
-			p.buffered = true
-			p.b = sz
-			p.rembytes = sz
-		}
-		pt := binary.LittleEndian.Uint16(data[4:6])
-		p.Proto = uint8(pt)
-		p.TTL = uint8(pt >> 8)
-		p.SrcPort = binary.LittleEndian.Uint16(data[6:8])
-		p.DstPort = binary.LittleEndian.Uint16(data[8:10])
+	if sz+PacketHeadLen == len(data) {
+		p.data = pbuf.ParseBytes(data[PacketHeadLen:]...)
+		return true
 	}
 
 	flags := PacketFlags(binary.LittleEndian.Uint16(data[10:12]))
-
+	if config.ShowDebugLog {
+		logrus.Debugln("[packet] parse data flags", flags, "off", flags.Offset())
+	}
 	if flags.ZeroOffset() {
 		p.Flags = flags
-		p.Src = make(net.IP, 4)
-		copy(p.Src, data[12:16])
-		p.Dst = make(net.IP, 4)
-		copy(p.Dst, data[16:20])
-		copy(p.Hash[:], data[20:52])
-	}
-
-	if p.rembytes > 0 {
-		p.rembytes -= copy(p.data[flags.Offset():], data[PacketHeadLen:])
 		if config.ShowDebugLog {
-			logrus.Debugln("[packet] copied frag", hex.EncodeToString(p.Hash[:]), "rembytes:", p.rembytes)
+			logrus.Debugln("[packet] parse data set zero offset flags", flags)
 		}
 	}
 
-	complete = p.rembytes == 0
+	rembytes := atomic.LoadInt32(&p.rembytes)
+	if rembytes > 0 {
+		n := int32(copy(p.data.Bytes()[flags.Offset():], data[PacketHeadLen:]))
+		newrem := rembytes - n
+		for !atomic.CompareAndSwapInt32(&p.rembytes, rembytes, newrem) {
+			rembytes = atomic.LoadInt32(&p.rembytes)
+			newrem = rembytes - n
+		}
+		if config.ShowDebugLog {
+			logrus.Debugln("[packet] copied frag", hex.EncodeToString(data[20:52]), "rembytes:", p.rembytes)
+		}
+	}
 
-	return
+	return p.rembytes <= 0
 }
 
 // DecreaseAndGetTTL TTL 自减后返回
@@ -132,9 +168,13 @@ func (p *Packet) DecreaseAndGetTTL() uint8 {
 	return p.TTL
 }
 
-// Marshal 将自身数据编码为 []byte
+// MarshalWith 补全剩余参数, 将自身数据编码为 []byte
 // offset 必须为 8 的倍数，表示偏移的 8 位
-func (p *Packet) Marshal(src net.IP, teatype uint8, additional uint16, datasz uint32, offset uint16, dontfrag, hasmore bool) ([]byte, func()) {
+func (p *Packet) MarshalWith(
+	src net.IP, teatype uint8, additional uint16,
+	datasz uint32, offset uint16,
+	dontfrag, hasmore bool,
+) pbuf.Bytes {
 	if src != nil {
 		p.Src = src
 		p.idxdatsz = (uint32(teatype) << 27) | (uint32(additional&0x07ff) << 16) | datasz&0xffff
@@ -148,8 +188,7 @@ func (p *Packet) Marshal(src net.IP, teatype uint8, additional uint16, datasz ui
 		offset |= 0x2000
 	}
 	p.Flags = PacketFlags(offset)
-
-	return helper.OpenWriterF(func(w *helper.Writer) {
+	return helper.NewWriterF(func(w *helper.Writer) {
 		w.WriteUInt32(p.idxdatsz)
 		w.WriteUInt16((uint16(p.TTL) << 8) | uint16(p.Proto))
 		w.WriteUInt16(p.SrcPort)
@@ -158,7 +197,7 @@ func (p *Packet) Marshal(src net.IP, teatype uint8, additional uint16, datasz ui
 		w.Write(p.Src.To4())
 		w.Write(p.Dst.To4())
 		w.Write(p.Hash[:])
-		p.crc64 = CalcCRC64(w.Bytes())
+		p.crc64 = CalcCRC64(w.UnsafeBytes())
 		w.WriteUInt64(p.crc64)
 		w.Write(p.Body())
 	})
@@ -189,6 +228,7 @@ func (p *Packet) IsVaildHash() bool {
 	var sum [32]byte
 	_ = h.Sum(sum[:0])
 	if config.ShowDebugLog {
+		logrus.Debugln("[packet] sum data len:", len(p.Body()))
 		logrus.Debugln("[packet] sum calulated:", hex.EncodeToString(sum[:]))
 		logrus.Debugln("[packet] sum in packet:", hex.EncodeToString(p.Hash[:]))
 	}
@@ -210,45 +250,28 @@ func (p *Packet) Len() int {
 	return int(p.idxdatsz & 0xffff)
 }
 
-// Put 将自己放回池中
-func (p *Packet) Put() {
-	PutPacket(p)
-}
-
 func (p *Packet) CRC64() uint64 {
 	return p.crc64
 }
 
 // Body returns data
 func (p *Packet) Body() []byte {
-	return p.data[p.a:p.b]
+	return p.data.Bytes()[p.a:p.b]
 }
 
 func (p *Packet) BodyLen() int {
 	return p.b - p.a
 }
 
-func (p *Packet) SetBody(b []byte, buffered bool) {
+func (p *Packet) SetBody(b []byte) {
 	p.a = 0
 	p.b = len(b)
-	if len(b) <= cap(p.data) {
-		p.data = p.data[:len(b)]
-		copy(p.data, b)
-		if buffered {
-			helper.PutBytes(b)
-		}
-		return
-	}
-	if p.buffered {
-		helper.PutBytes(p.data)
-	}
-	p.data = b
-	p.buffered = buffered
+	p.data = pbuf.ParseBytes(b...)
 }
 
 func (p *Packet) CropBody(a, b int) {
-	if b > len(p.data) {
-		b = len(p.data)
+	if b > p.data.Len() {
+		b = p.data.Len()
 	}
 	if a < 0 || b < 0 || a > b {
 		return
@@ -256,16 +279,8 @@ func (p *Packet) CropBody(a, b int) {
 	p.a, p.b = a, b
 }
 
-func (p *Packet) Copy() *Packet {
-	newp := SelectPacket()
-	*newp = *p
-	newp.buffered = false
-	return newp
-}
-
-func (p *Packet) CopyWithBody() *Packet {
-	newp := p.Copy()
-	newp.data = helper.MakeBytes(len(p.data))
-	copy(newp.data, p.data)
+func (p *Packet) ShallowCopy() (newp Packet) {
+	newp = *p
+	newp.data = p.data.Ref()
 	return newp
 }