fumiama/WireGold
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add pool & writer

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This commit is contained in:
fumiama
2022-01-01 19:32:15 +08:00
parent ef6b5d7293
commit c66e524c51
7 changed files with 227 additions and 82 deletions
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45
gold/head/packet.go
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@@ -6,6 +6,7 @@ import (
"net"
"unsafe"
"github.com/fumiama/WireGold/helper"
blake2b "github.com/minio/blake2b-simd"
)
@@ -57,15 +58,21 @@ func (p *Packet) Unmarshal(data []byte) (complete bool, err error) {
err = errors.New("data len < 12")
return
}
if p.DataSZ == 0 && len(p.Data) == 0 {
p.DataSZ = binary.LittleEndian.Uint32(data[:4])
p.Data = make([]byte, p.DataSZ)
if int(p.DataSZ)+52 == len(data) {
p.Data = data[52:]
p.rembytes = 0
} else {
p.Data = make([]byte, p.DataSZ)
p.rembytes = p.DataSZ
}
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])
p.rembytes = p.DataSZ
}
flags := binary.LittleEndian.Uint16(data[10:12])
@@ -78,7 +85,10 @@ func (p *Packet) Unmarshal(data []byte) (complete bool, err error) {
copy(p.Dst, data[16:20])
copy(p.Hash[:], data[20:52])
}
p.rembytes -= uint32(copy(p.Data[flags<<3:], data[52:]))
if p.rembytes > 0 {
p.rembytes -= uint32(copy(p.Data[flags<<3:], data[52:]))
}
complete = p.rembytes == 0
@@ -87,10 +97,10 @@ func (p *Packet) Unmarshal(data []byte) (complete bool, err error) {
// Marshal 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, datasz uint32, offset uint16, dontfrag, hasmore bool) []byte {
func (p *Packet) Marshal(src net.IP, datasz uint32, offset uint16, dontfrag, hasmore bool) ([]byte, func()) {
p.TTL--
if p.TTL == 0 {
return nil
return nil, nil
}
if src != nil {
@@ -105,20 +115,17 @@ func (p *Packet) Marshal(src net.IP, datasz uint32, offset uint16, dontfrag, has
p.Flags = offset
}
packet := make([]byte, 52+len(p.Data))
binary.LittleEndian.PutUint32(packet[:4], p.DataSZ)
binary.LittleEndian.PutUint16(packet[4:6], (uint16(p.TTL)<<8)|uint16(p.Proto))
binary.LittleEndian.PutUint16(packet[6:8], p.SrcPort)
binary.LittleEndian.PutUint16(packet[8:10], p.DstPort)
binary.LittleEndian.PutUint16(packet[10:12], p.Flags)
copy(packet[12:16], p.Src.To4())
copy(packet[16:20], p.Dst.To4())
copy(packet[20:52], p.Hash[:])
copy(packet[52:], p.Data)
// logrus.Debugln("[packet] marshaled packet:", hex.EncodeToString(packet))
return packet
return helper.OpenWriterF(func(w *helper.Writer) {
w.WriteUInt32(p.DataSZ)
w.WriteUInt16((uint16(p.TTL) << 8) | uint16(p.Proto))
w.WriteUInt16(p.SrcPort)
w.WriteUInt16(p.DstPort)
w.WriteUInt16(p.Flags)
w.Write(p.Src.To4())
w.Write(p.Dst.To4())
w.Write(p.Hash[:])
w.Write(p.Data)
})
}
// FillHash 生成 p.Data 的 Hash