端口扫描器设计实现（Python）

一.个人感悟

通过本次实验, 学习了扫描器设计的基本原理,并动手设计了一个开放端口扫描器.

具体原理:

1.编写前端GUI

2.学习Socket编程, 使用Socket编程的connect方法返回0 为连接成功,实现端口扫描器.

       改进的地方: 如果settimeout 设置的太短则扫描不到有些端口, 设置的太长则耗时太长, 后续尝试使用多线程方式, 解决软件卡住问题.

二.运行结果

本机IP扫描结果:

       百度地址扫描结果:

三.程序源码

import sys
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import *
from StaticUI.singleThreadPortScanner import Ui_MainWindow
import socket


class MainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setupUi(self)
        self.bind_button()
        self.init_ui()

    def init_ui(self):
        hostname = socket.gethostname()
        self.lineEdit_4.setText(hostname)
        ip = socket.gethostbyname(hostname)
        self.lineEdit_2.setText(ip)
        self.lineEdit.setInputMask('000.000.000.000;')
        pass

    def bind_button(self):
        self.pushButton.clicked.connect(self.start_scan)
        pass

    def start_scan(self):
        ip = self.lineEdit.text()
        start_port = self.lineEdit_5.text()
        end_port = self.lineEdit_3.text()
        host = ip

        target_ip = socket.gethostbyname(host)

        for port in range(int(start_port), int(end_port)):
            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            sock.settimeout(0.1)
            result = sock.connect_ex((target_ip, port))
            if result == 0:
                self.textBrowser.append(target_ip + ":" + str(port) + "is open.")
                # print(target_ip, ":", port, "is open.")
        self.textBrowser.append("finish!")
        pass


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)  # 初始化app
    test = MainWindow()
    test.show()  # 显示窗口
    sys.exit(app.exec_())