python进行TCP端口扫描的实现

#测试当前主机和端口是否开放，直接使用socket连接
def connScan(host,port):
  try:
    connSkt = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    connSkt.connect((host,port))
    print("tcp open port:" + str(port))
  except:
    print('tcp closed:'+str(port))

def portScan(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)  
  for tgtPort in tgtPorts:    
    print('Scanning port ' + str(tgtPort))    connScan(tgtHost, int(tgtPort))

portScan('www.baidu.com', [80,443,3389,1433,23,445])

[+] Scan Results for: 61.135.169.125
Scanning port 80
tcp open port:80
Scanning port 443
tcp open port:443
Scanning port 3389
tcp closed:3389
Scanning port 1433
tcp closed:1433
Scanning port 23
tcp closed:23
Scanning port 445
tcp closed:445

#测试当前主机和端口是否开放，直接使用socket连接
def connScan(host,port):
  try:
    connSkt = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    connSkt.connect((host,port))
    connSkt.send('Python\r\n')
    results = connSkt.recv(100)
    print("tcp open port:" + str(port))
    print('[+] ' + str(results)) 
  except:
    print('tcp closed:'+str(port))
def portScan(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)  
  for tgtPort in tgtPorts:    
    print('Scanning port ' + str(tgtPort))    
    connScan(tgtHost, int(tgtPort))

portScan('www.qq.com', [22,80,443,3389,1433,23,445])

for tgtPort in tgtPorts:
  print('Scanning port ' + str(tgtPort))
  t = threading.Thread(target=connScan, args=(tgtHost,
  int(tgtPort)))
  t.start()

import nmap
def nmapScan(tgtHost, tgtPort):
  nmScan = nmap.PortScanner()
  results = nmScan.scan(tgtHost, tgtPort)
  state = results['scan'][tgtHost]['tcp'][int(tgtPort)]['state']
  print(" [*] " + tgtHost + " tcp/" + tgtPort + " " + state)
  nmapScan('10.108.x.x','8080')