python端口扫描程序

from socket import *
tgtHost=raw_input("What is the web address?: ")
tgtPorts=raw_input("What are the ports seperated by commas? or would you like to test all?: ")
def connScan(tgtHost,tgtPort):
    try:
        connSkt=socket(AF_INET,SOCK_STREAM)
        connSkt.settimeout(10)
        connSkt.connect((tgtHost,tgtPort))
        connSkt.settimeout(None)
        print("%d/tcp open"%tgtPort)
    except:
        print("%d/tcp closed"%tgtPort)
def portScan(tgtHost,tgtports):
    global tgtPorts
    
    if  tgtPorts=="yes" or tgtPorts=="ya" or tgtPorts=="sure" or tgtPorts=="ok" or tgtPorts=="y" or tgtPorts=="Y":
         tgtPorts=21,22,23,25,42,43,53,67,79,80,102,110,115,119,123,135,137,143,161,179,379,389,443,445,465,636,993,995,1026,1080,1090,1433,1434,1521,1677,1701,1720,1723,1900,2409,3101,3306,3389,3390,3535,4321,4664,5190,5500,5631,5632,5900,7070,7100,8000,8080,8799,8880,9100,19430,39720
    
    
    try:
        tgtIP=gethostbyname(tgtHost)
    except:
        print(" Cannot resolve '%s': Unknown host"%tgtHost)
        return
    try:
        tgtName=gethostbyaddr(tgtIP)
        print('n Scan results for: %s' %tgtName)
    except:
        print('n Scan results for: %s' %tgtIP)
    tgtPorts=tgtPorts.split(',')
    for port in tgtPorts:
        print('Scanning port %s'%port)
        connScan(tgtHost,int(port))
def main():
    portScan(tgtHost,tgtPorts)
if __name__=='__main__':
    main()