commit c4560cbacf550a1daad7f0395f420d0e49e3f54a
Author: Spedoske <52339623+Spedoske@users.noreply.github.com>
Date:   Sun Jul 5 13:19:53 2020 +0800

    Initial Commit

diff --git a/IPRangeLoader.go b/IPRangeLoader.go
new file mode 100644
index 0000000..1a66031
--- /dev/null
+++ b/IPRangeLoader.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"bufio"
+	"log"
+	"net"
+	"os"
+)
+
+func loadFirstIPOfRangeFromFile() []net.IPAddr {
+	file, err := os.Open("ip.txt")
+	if err != nil {
+		log.Fatal(err)
+	}
+	firstIPs := make([]net.IPAddr, 0)
+	scanner := bufio.NewScanner(file)
+	scanner.Split(bufio.ScanLines)
+	for scanner.Scan() {
+		IPString := scanner.Text()
+		firstIP, IPRange, err := net.ParseCIDR(IPString)
+		if err != nil {
+			log.Fatal(err)
+		}
+		firstIP[15]=ipEndWith
+		for IPRange.Contains(firstIP) {
+			firstIPCopy := make([]byte, len(firstIP))
+			copy(firstIPCopy, firstIP)
+			firstIPs = append(firstIPs, net.IPAddr{IP: firstIPCopy})
+			firstIP[14]++
+			if firstIP[14] == 0 {
+				firstIP[13]++
+				if firstIP[13] == 0 {
+					firstIP[12]++
+				}
+			}
+		}
+	}
+	return firstIPs
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..c16100f
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module CloudflareIPScanner
+
+go 1.14
+
+require github.com/cheggaaa/pb/v3 v3.0.4
diff --git a/ip.txt b/ip.txt
new file mode 100644
index 0000000..ce04079
--- /dev/null
+++ b/ip.txt
@@ -0,0 +1,14 @@
+173.245.48.0/20
+103.21.244.0/22
+103.22.200.0/22
+103.31.4.0/22
+141.101.64.0/18
+108.162.192.0/18
+190.93.240.0/20
+188.114.96.0/20
+197.234.240.0/22
+198.41.128.0/17
+162.158.0.0/15
+104.16.0.0/12
+172.64.0.0/13
+131.0.72.0/22
\ No newline at end of file
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..57d8f24
--- /dev/null
+++ b/main.go
@@ -0,0 +1,79 @@
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"github.com/cheggaaa/pb/v3"
+	"log"
+	"os"
+	"sync"
+)
+
+func ExportCsv(filePath string, data [][]string) {
+	fp, err := os.Create(filePath)
+	if err != nil {
+		log.Fatalf("创建文件["+filePath+"]句柄失败,%v", err)
+		return
+	}
+	defer fp.Close()
+	w := csv.NewWriter(fp) //创建一个新的写入文件流
+	w.WriteAll(data)
+	w.Flush()
+}
+
+var pingTime int
+var pingRoutine int
+const ipEndWith uint8 = 1
+type progressEvent int
+const (
+	NoAvailableIPFound progressEvent = iota
+	AvailableIPFound
+	NormalPing
+)
+
+func handleProgressGenerator(pb *pb.ProgressBar)func (e progressEvent){
+	return func(e progressEvent) {
+		switch e {
+		case NoAvailableIPFound:
+			pb.Add(pingTime)
+		case AvailableIPFound:
+			pb.Add(failTime)
+		case NormalPing:
+			pb.Increment()
+		}
+	}
+}
+
+func handleUserInput(){
+	fmt.Println("请输入扫描协程数(数字越大越快,默认100):")
+	fmt.Scanln(&pingRoutine)
+	if pingRoutine<=0{
+		pingRoutine=100
+	}
+	fmt.Println("请输入tcping次数(默认10):")
+	fmt.Scanln(&pingTime)
+	if pingTime<=0{
+		pingTime=10
+	}
+}
+
+func main(){
+	handleUserInput()
+	ips:=loadFirstIPOfRangeFromFile()
+	pingCount:=len(ips)*pingTime
+	bar := pb.StartNew(pingCount)
+	var wg sync.WaitGroup
+	var mu sync.Mutex
+	var data = make([][]string,0)
+	data = append(data,[]string{"IP Address","Ping received","Ping time"})
+	control := make(chan bool,pingRoutine)
+	for _,ip :=range ips{
+		wg.Add(1)
+		control<-false
+		handleProgress:=handleProgressGenerator(bar)
+		go tcpingGoroutine(&wg,&mu,ip,pingTime, &data,control,handleProgress)
+	}
+	wg.Wait()
+	bar.Finish()
+	ExportCsv("./result.csv",data)
+}
diff --git a/tcping.go b/tcping.go
new file mode 100644
index 0000000..35eb44b
--- /dev/null
+++ b/tcping.go
@@ -0,0 +1,87 @@
+package main
+
+import (
+	"net"
+	"strconv"
+	"sync"
+	"time"
+)
+
+const defaultTcpPort = 443
+const tcpConnectTimeout = time.Second * 1
+const failTime = 4
+
+//bool connectionSucceed float64 time
+func tcping(ip net.IPAddr) (bool, float64) {
+	startTime := time.Now()
+	conn, err := net.DialTimeout("tcp", ip.String()+":"+strconv.Itoa(defaultTcpPort), tcpConnectTimeout)
+	if err != nil {
+		return false, 0
+	} else {
+		var endTime = time.Since(startTime)
+		var duration = float64(endTime.Microseconds()) / 1000.0
+		_ = conn.Close()
+		return true, duration
+	}
+}
+
+//pingReceived pingTotalTime
+func checkConnection(ip net.IPAddr) (int, float64) {
+	pingRecv := 0
+	pingTime := 0.0
+	for i := 1; i <= failTime; i++ {
+		pingSucceed, pingTimeCurrent := tcping(ip)
+		if pingSucceed {
+			pingRecv++
+			pingTime += pingTimeCurrent
+		}
+	}
+	return pingRecv, pingTime
+}
+
+//return Success packetRecv averagePingTime specificIPAddr
+func tcpingHandler(ip net.IPAddr, pingCount int, progressHandler func(e progressEvent)) (bool, int, float64, net.IPAddr) {
+	ipCanConnect := false
+	pingRecv := 0
+	pingTime := 0.0
+	for !ipCanConnect {
+		pingRecvCurrent, pingTimeCurrent := checkConnection(ip)
+		if pingRecvCurrent != 0 {
+			ipCanConnect = true
+			pingRecv = pingRecvCurrent
+			pingTime = pingTimeCurrent
+		} else {
+			ip.IP[15]++
+			if ip.IP[15] == 0 {
+				break
+			}
+			break
+		}
+	}
+	if ipCanConnect {
+		progressHandler(AvailableIPFound)
+		for i := failTime; i < pingCount; i++ {
+			pingSuccess, pingTimeCurrent := tcping(ip)
+			progressHandler(NormalPing)
+			if pingSuccess {
+				pingRecv++
+				pingTime += pingTimeCurrent
+			}
+		}
+		return true, pingRecv, pingTime / float64(pingRecv), ip
+	} else {
+		progressHandler(NoAvailableIPFound)
+		return false, 0, 0, net.IPAddr{}
+	}
+}
+
+func tcpingGoroutine(wg *sync.WaitGroup, mutex *sync.Mutex, ip net.IPAddr, pingCount int, csv *[][]string, control chan bool, progressHandler func(e progressEvent)) {
+	defer wg.Done()
+	success, pingRecv, pingTimeAvg, currentIP := tcpingHandler(ip, pingCount, progressHandler)
+	if success {
+		mutex.Lock()
+		*csv = append(*csv, []string{currentIP.String(), strconv.Itoa(pingRecv), strconv.FormatFloat(pingTimeAvg, 'f', 4, 64)})
+		mutex.Unlock()
+	}
+	<-control
+}