import sys
import socket
import multiprocessing
def ports(ports_service):
  #獲取常用端口對應的服務名稱
  for port in list(range(1,100))+[143,145,113,443,445,3389, 8080]:
    try:
      ports_service[port] = socket.getservbyport(port)
    except socket.error:
      pass
def ports_scan(HOST, ports_service):
  ports_open = []
  try:
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    #sock.settimeout(60)
  except socket.error:
    print('socket creation error')
    sys.exit()
  for port in ports_service:
    try:
      #嘗試連接指定端口
      sock.connect((HOST,port))
      #記錄打開的端口
      ports_open.append(port)
      sock.close()
    except socket.error:
      pass
  return ports_open
if __name__=='__main__':
  m = multiprocessing.Manager()
  ports_service = dict()
  results = dict()
  ports(ports_service)
  #創(chuàng)建進程池，允許最多8個進程同時運行
  pool = multiprocessing.Pool(processes=8)
  net = '192.168.0.'
  for host_number in map(str,range(105,106)):
    host = net+host_number
    #創(chuàng)建一個新進程，同時記錄其運行結(jié)果
    results[host] = pool.apply_async(ports_scan, (host, ports_service))
    print('starting '+host+'...')
  #關閉進程池，close()必須在join()之前調(diào)用
  pool.close()
  #等待進程池中的進程全部執(zhí)行結(jié)束
  pool.join()
  #打印輸出結(jié)果
  for host in results:
    print('='*30)
    print(host,'.'*10)
    for port in results[host].get():
      print(port, ':', ports_service[port])