优化抓包性能

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

@@ -1,109 +0,0 @@
-// Copyright 2012 Google, Inc. 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 binary pulls known ports from IANA, and uses them to populate
-// iana_ports.go's TCPPortNames and UDPPortNames maps.
-//
-//  go run gen.go | gofmt > iana_ports.go
-package main
-
-import (
-	"bytes"
-	"encoding/xml"
-	"flag"
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"os"
-	"strconv"
-	"time"
-)
-
-const fmtString = `// Copyright 2012 Google, Inc. All rights reserved.
-
-package layers
-
-// Created by gen.go, don't edit manually
-// Generated at %s
-// Fetched from %q
-
-// TCPPortNames contains the port names for all TCP ports.
-var TCPPortNames = tcpPortNames
-
-// UDPPortNames contains the port names for all UDP ports.
-var UDPPortNames = udpPortNames
-
-// SCTPPortNames contains the port names for all SCTP ports.
-var SCTPPortNames = sctpPortNames
-
-var tcpPortNames = map[TCPPort]string{
-%s}
-var udpPortNames = map[UDPPort]string{
-%s}
-var sctpPortNames = map[SCTPPort]string{
-%s}
-`
-
-var url = flag.String("url", "http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml", "URL to grab port numbers from")
-
-func main() {
-	fmt.Fprintf(os.Stderr, "Fetching ports from %q\n", *url)
-	resp, err := http.Get(*url)
-	if err != nil {
-		panic(err)
-	}
-	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		panic(err)
-	}
-	fmt.Fprintln(os.Stderr, "Parsing XML")
-	var registry struct {
-		Records []struct {
-			Protocol string `xml:"protocol"`
-			Number   string `xml:"number"`
-			Name     string `xml:"name"`
-		} `xml:"record"`
-	}
-	xml.Unmarshal(body, &registry)
-	var tcpPorts bytes.Buffer
-	var udpPorts bytes.Buffer
-	var sctpPorts bytes.Buffer
-	done := map[string]map[int]bool{
-		"tcp":  map[int]bool{},
-		"udp":  map[int]bool{},
-		"sctp": map[int]bool{},
-	}
-	for _, r := range registry.Records {
-		port, err := strconv.Atoi(r.Number)
-		if err != nil {
-			continue
-		}
-		if r.Name == "" {
-			continue
-		}
-		var b *bytes.Buffer
-		switch r.Protocol {
-		case "tcp":
-			b = &tcpPorts
-		case "udp":
-			b = &udpPorts
-		case "sctp":
-			b = &sctpPorts
-		default:
-			continue
-		}
-		if done[r.Protocol][port] {
-			continue
-		}
-		done[r.Protocol][port] = true
-		fmt.Fprintf(b, "\t%d: %q,\n", port, r.Name)
-	}
-	fmt.Fprintln(os.Stderr, "Writing results to stdout")
-	fmt.Printf(fmtString, time.Now(), *url, tcpPorts.String(), udpPorts.String(), sctpPorts.String())
-}