扫描工具

代码如下：

import optparse
import socket
def connScan(tgtHost,tgtPort):
    try:
        s = socket.socket()
        s.connect((tgtHost,int(tgtPort)))
        resv = s.recv(1024)
        print('[+] %s/tcp open'%tgtPort)
        print('[+]' +str(resv.decode('utf-8')))
        s.close()
    except:
        #print(tgtHost + ' ',tgtPort)
        print('[-] %s/tcp closed'%tgtPort)
def postScan(tgtHost,tgtPorts):
    try:
        tgtIP = socket.gethostbyname(tgtHost)
    except:
        print("[-] Cannot resolve '%s':Unknown host"%tgtHost)
        return
    try:
        tgtName = socket.gethostbyaddr(tgtIP)
        print('\n[+] Scan Results for:'+tgtName[0])
    except:
        print('\n[+] Scan Results for:'+tgtIP)
    socket.setdefaulttimeout(1)
    posts_list = tgtPorts.split(',')
    print(posts_list)
    for tgtPort in posts_list:
        #print(tgtPort)
        print('scanning port' + tgtPort)
        connScan(tgtHost,int(tgtPort))
def main():
    parser = optparse.OptionParser()
    parser.add_option('-H',dest="tgtHost",type="string",help="specify target port[s] separated by comma0")
    parser.add_option("-P",dest='tgtPort',type=('string'),help='specify target post[s] separated by comma')
    (options,args)=parser.parse_args()
    tgHost = options.tgtHost
    tgPorts = options.tgtPort
    if (tgHost==None) | (tgPorts==None):
        print('[-] You must specify a target hos  t and port[s].')
        exit(0)
    postScan(tgHost,tgPorts)
if __name__ == '__main__':
    main()



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发这个的原因    买的一本书里面的代码全是2.7的

保存纪念以及方便后续阅读
　　　　　　　　　　　　　　           2018.6.23
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