优化抓包性能

vendor/github.com/google/gopacket/gen.go

@@ -1,75 +0,0 @@
-// Copyright 2019 The GoPacket Authors. All rights reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the LICENSE file in the root of the source
-// tree.
-
-// +build ignore
-
-// This file generates LayersDecoder function for DecodingLayerContainer
-// go run gen.go | gofmt > layers_decoder.go
-package main
-
-import (
-	"fmt"
-	"os"
-	"time"
-)
-
-const headerFmt = `// Copyright 2019 The GoPacket Authors. All rights reserved.
-
-package gopacket
-
-// Created by gen.go, don't edit manually
-// Generated at %s
-
-// LayersDecoder returns DecodingLayerFunc for specified
-// DecodingLayerContainer, LayerType value to start decoding with and
-// some DecodeFeedback.
-func LayersDecoder(dl DecodingLayerContainer, first LayerType, df DecodeFeedback) DecodingLayerFunc {
-  firstDec, ok := dl.Decoder(first)
-  if !ok {
-    return func([]byte, *[]LayerType) (LayerType, error) {
-      return first, nil
-    }
-  }
-`
-
-var funcBody = `return func(data []byte, decoded *[]LayerType) (LayerType, error) {
-  *decoded = (*decoded)[:0] // Truncated decoded layers.
-  typ := first
-  decoder := firstDec
-  for {
-    if err := decoder.DecodeFromBytes(data, df); err != nil {
-      return LayerTypeZero, err
-    }
-    *decoded = append(*decoded, typ)
-    typ = decoder.NextLayerType()
-    if data = decoder.LayerPayload(); len(data) == 0 {
-      break
-    }
-    if decoder, ok = dlc.Decoder(typ); !ok {
-      return typ, nil
-    }
-  }
-  return LayerTypeZero, nil
-}`
-
-func main() {
-	fmt.Fprintf(os.Stderr, "Writing results to stdout\n")
-	types := []string{
-		"DecodingLayerSparse",
-		"DecodingLayerArray",
-		"DecodingLayerMap",
-	}
-
-	fmt.Printf(headerFmt, time.Now())
-	for _, t := range types {
-		fmt.Printf("if dlc, ok := dl.(%s); ok {", t)
-		fmt.Println(funcBody)
-		fmt.Println("}")
-	}
-	fmt.Println("dlc := dl")
-	fmt.Println(funcBody)
-	fmt.Println("}")
-}