python | 端口扫描器（多线程）

基于python2.7的多线程端口扫描器

使用方法：

python2 scan.py -H www.baidu.com -p 80,443,3389

源代码：

# -*- coding: utf-8 -*-
import optparse
import socket
from socket import *
from threading import *

screenLock = Semaphore(value=1)
def connScan(tgtHost,tgtPort): #尝试逐个链接我们需要连接的端口
    try:
        #第一个是网络的协议，第二个是默认的参数值
        connSkt = socket(AF_INET,SOCK_STREAM)
        connSkt.connect((tgtHost,tgtPort))
        connSkt.send('addslashes_J0NG
')
        results = connSkt.recv(100)
        screenLock.acquire()
        print '[+]%d/tcp open'% tgtPort
        print '[+]' +str(results)
        connSkt.close()
    except:
        screenLock.acquire()
        print '[-]%d/tcp closed'% tgtPort

    finally:
        screenLock.release()
        connSkt.close()

def portScan(tgtHost,tgtPorts):
    try:#获得主机的ip地址
        tgtIP = gethostbyname(tgtHost)
    except:
        print "[-] Cannot resolve '%s': Unknow host" %tgtHost
        return
    try:#获得主机名
        tgtName = gethostbyaddr(tgtIP)
        print '
[+]Scan results for: ' +tgtName[0]
    except:
        print '
[+]Scan results for: ' +tgtIP
    setdefaulttimeout(1)
    for tgtPort in tgtPorts:
        t = Thread(target=connScan,args=(tgtHost,int(tgtPort)))
        t.start()


def main():
    parser = optparse.OptionParser("usage %prog -H + <target host> -p <target port>")
    #带参的话会把参数变量的内容作为帮助信息输出
    parser.add_option('-H',dest = 'tgtHost',type = 'string',help = 'specif target host')
    parser.add_option('-p',dest = 'tgtPort',type = 'string',help = 'specif target port')
    (options,args) = parser.parse_args()
    tgtHost = options.tgtHost
    tgtPorts = str(options.tgtPort).split(',')


    if (tgtHost ==None) | (tgtPorts[0] == None):
        print '[-]you must specify a target host and port[s].'
        exit(0)
    portScan(tgtHost,tgtPorts)
if __name__=="__main__":
    main()