GO语言实现的端口扫描器分享

//go语言  实现端口扫描
    //缺陷
    //port  无法设置成全局变量不知道怎么设置的
    //var l = list.new()   这个是数组操作并不是消息队列    跟消息队列功能类似

    //实现功能
    //实现生成 ip段
    //实现端口扫描
    //实现参数传入
    //写入文件到本地
    //main.go 58.215.20.30 58.215.201.30 80
    //文件名 开始ip 结束ip 扫描端口
    //qq29295842   希望认识更多的朋友技术交流
    //qq群367196336   go   golang web安全开发
    package main

    import (
        "container/list"
        "fmt"
        "net"
        "os"
        "strconv"
        "strings"
        "time"
    )

    func ip2num(ip string) int {
        cansplit := func(c rune) bool { return c == '.' }
        lisit := strings.fieldsfunc(ip, cansplit) //[58 215 20 30]
        //fmt.println(lisit)
        ip1_str_int, _ := strconv.atoi(lisit[0])
        ip2_str_int, _ := strconv.atoi(lisit[1])
        ip3_str_int, _ := strconv.atoi(lisit[2])
        ip4_str_int, _ := strconv.atoi(lisit[3])
        return ip1_str_int<<24 | ip2_str_int<<16 | ip3_str_int<<8 | ip4_str_int
    }

    func num2ip(num int) string {
        ip1_int := (num & 0xff000000) >> 24
        ip2_int := (num & 0x00ff0000) >> 16
        ip3_int := (num & 0x0000ff00) >> 8
        ip4_int := num & 0x000000ff
        //fmt.println(ip1_int)
        data := fmt.sprintf("%d.%d.%d.%d", ip1_int, ip2_int, ip3_int, ip4_int)
        return data
    }

    func gen_ip(aip1 int, aip2 int) {
        index := aip1
        for index < aip2 {
            //fmt.println(num2ip(index))
            // 入队, 压栈
            ip_data := num2ip(index)
            //fmt.println(ip_data)
            l.pushback(ip_data)
            index++
        }
    }

    func text_add(name string, data string) { //向文件中写入数据   text_add("file2.txt", "qqqqqqqqqqqqqqqqqqqqqqq")
        f, err := os.openfile(name, os.o_rdwr|os.o_create|os.o_append, 0x644)
        if err != nil {
            panic(err)
        }
        defer f.close()

        _, err = f.writestring(data)
        _, err = f.writestring("\r\n")
        if err != nil {
            panic(err)
        }
    }

    //text_add("file2.txt", "qqqqqqqqqqqqqqqqqqqqqqq")
    var l = list.new()

    func socket_ip(host string, port string) bool {
        var (
            remote = host + ":" + port
        )

        tcpaddr, _ := net.resolvetcpaddr("tcp4", remote) //转换ip格式
        //fmt.printf("%s", tcpaddr)
        conn, err := net.dialtcp("tcp", nil, tcpaddr) //查看是否连接成功
        if err != nil {
            fmt.printf("no==%s:%s\r\n", host, port)
            return false

        }
        defer conn.close()
        fmt.printf("ok==%s:%s\r\n", host, port)
        return true
    }

    func for_ip(port string) {
        now := time.now()
        year, mon, day := now.utc().date()
        file_name := fmt.sprintf("%d-%d-%d_%s", year, mon, day, port)
        for { //死循环
            if l.len() <= 0 {
                fmt.println("跳出循环")
                break //#跳出
            }
            // 出队  从前读取
            i1 := l.front()
            l.remove(i1)
            ip, _ := i1.value.(string)
            if socket_ip(ip, port) {
                //ok
                //获取当前  日期作为文件名  在把ip写入进去
                text_add(file_name+"_ok.txt", ip)
            } //else {
            //  text_add(file_name+"_no.txt", ip)
            // }

            time.sleep(time.millisecond * 500) //纳秒为单位
        }
    }

    func main() {
        argslen := len(os.args)
        //fmt.println(argslen)
        if argslen != 4 {
            fmt.println("main.go 58.215.20.30 58.215.201.30 80")
        } else {
            gen_ip(ip2num(os.args[1]), ip2num(os.args[2]))
            for index := 0; index < 200; index++ {
                go for_ip(os.args[3])
            }
            for {
                time.sleep(1 * time.second) //纳秒为单位
            }

        }
    }