套接字编程知识回顾01

#-*- coding:utf8 -*-
'''
Created on 2018年9月17日

@author: Administrator
'''
import socket

def main(target,port):
    sk=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    sk.connect((target,port))
    sk.send("successful to connection...".encode("utf-8"))
    response=sk.recv(1024)
    print(str(response,"utf-8"))
if __name__=="__main__":
    target="127.0.0.1"
    port=8000
    main(target,port)

# -*- coding:utf-8 -*-
'''
Created on 2018��9��17��

@author: Administrator
'''
import socket

def main(target,port):
    server=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    server.bind((target,port))
    server.listen(10)
    print("[*]启动监听%s:%d"%(target,port))
    client,addr=server.accept()
    print("[*]接受来自 %s:%d"%(addr[0],addr[1]))
    
    response=client.recv(1024)
    print(response.decode("utf-8"))
    
    client.send("success to connection...".encode("utf8"))
    client.close()
    
if __name__=="__main__":
    target="0.0.0.0"
    port=8000
    main(target,port)

 基于TCP的三次握手，对服务器的端口进行扫描。如果扫描成功，打印，否则不打印。

# -*- coding:utf-8 -*-

'''
Created on 2018年9月18日

@author: Administrator
'''

#1定义函数，用来进行TCP端口扫描
#2、启动多线程运行扫描函数

import socket

def portScan(target):
    client=socket.socket()
    try:
        client.connect((target,80))
        print("[*] %s:80  开放"%target)
        client.close()
    except:
        pass

def main():
    pass

if __name__=="__main__":
    target=input("please input ip address...")
    portScan(target)

　　利用多线程，提升扫描端口的效率

# -*- coding:utf-8 -*-

'''
Created on 2018年9月18日

@author: Administrator
'''

#1定义函数，用来进行TCP端口扫描
#2、启动多线程运行扫描函数

import socket,time
from threading import Thread


def portScan(target,port):
    client=socket.socket()
    try:
        client.connect((target,port))
        print("[*] %s:%d 开放"%(target,port))
        
    except:
        pass
    finally:
        client.close()

def main(target):
    threads=[]
    print("开始扫描：%s"%target)
    for port in range(1,1024):
        t=Thread(target=portScan,args=(target,port))
        threads.append(t)
        t.start()
    for i in threads:
#         i.start()
        t.join()
        
    

if __name__=="__main__":
    
    target=input("please input ip address...")
    start=time.time()
    main(target)
    print("over spend times %s"%(time.time()-start))