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remove static bytes array

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This commit is contained in:
Darien Raymond 2018-04-02 22:12:51 +02:00
parent c5bd23105e
commit 009d58dd6c
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GPG Key ID: 7251FFA14BB18169
1 changed files with 18 additions and 17 deletions
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35
transport/internet/kcp/io.go
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@ -5,6 +5,8 @@ import (
"crypto/rand"
"io"
"v2ray.com/core/common"
"v2ray.com/core/common/buf"
"v2ray.com/core/transport/internet"
)
@ -50,8 +52,6 @@ type KCPPacketWriter struct {
Header internet.PacketHeader
Security cipher.AEAD
Writer io.Writer
buffer [2048]byte
}
func (w *KCPPacketWriter) Overhead() int {
@ -66,27 +66,28 @@ func (w *KCPPacketWriter) Overhead() int {
}
func (w *KCPPacketWriter) Write(b []byte) (int, error) {
x := w.buffer[:]
size := 0
bb := buf.NewSize(int32(len(b) + w.Overhead()))
defer bb.Release()
if w.Header != nil {
nBytes, _ := w.Header.Write(x)
size += nBytes
x = x[nBytes:]
common.Must(bb.AppendSupplier(func(x []byte) (int, error) {
return w.Header.Write(x)
}))
}
if w.Security != nil {
nonceSize := w.Security.NonceSize()
var nonce []byte
if nonceSize > 0 {
nonce = x[:nonceSize]
rand.Read(nonce)
x = x[nonceSize:]
}
x = w.Security.Seal(x[:0], nonce, b, nil)
size += nonceSize + len(x)
common.Must(bb.AppendSupplier(func(x []byte) (int, error) {
return rand.Read(x[:nonceSize])
}))
nonce := bb.BytesFrom(int32(-nonceSize))
common.Must(bb.AppendSupplier(func(x []byte) (int, error) {
eb := w.Security.Seal(x[:0], nonce, b, nil)
return len(eb), nil
}))
} else {
size += copy(x, b)
bb.Append(b)
}
_, err := w.Writer.Write(w.buffer[:size])
_, err := w.Writer.Write(bb.Bytes())
return len(b), err
}