線程Python端口掃描程序

Question

我正在編輯端口掃描程序，我正在編輯使用線程。 這是原始代碼的基礎知識：

for i in range(0, 2000):  

    s = socket(AF_INET, SOCK_STREAM)  
    result = s.connect_ex((TargetIP, i))  

    if(result == 0) :  
        c = "Port %d: OPEN\n" % (i,)  

    s.close()

這大約需要33分鍾才能完成。 所以我想我會把它設置為讓它運行得更快一點。 這是我的第一個線程項目，所以它不是太極端，但我運行了以下代碼大約一個小時，沒有例外但沒有輸出。 我只是做錯誤的線程或什么？

import threading
from socket import *
import time

a = 0
b = 0
c = ""
d = ""

def ScanLow():
    global a
    global c

    for i in range(0, 1000):  
        s = socket(AF_INET, SOCK_STREAM)  
        result = s.connect_ex((TargetIP, i))  

        if(result == 0) :  
            c = "Port %d: OPEN\n" % (i,)  

        s.close()  
        a += 1

def ScanHigh():
    global b
    global d

    for i in range(1001, 2000):  
        s = socket(AF_INET, SOCK_STREAM)  
        result = s.connect_ex((TargetIP, i))  

        if(result == 0) :  
            d = "Port %d: OPEN\n" % (i,)  

        s.close()  
        b += 1

Target = raw_input("Enter Host To Scan:")
TargetIP = gethostbyname(Target)

print "Start Scan On Host ", TargetIP
Start = time.time()

threading.Thread(target = ScanLow).start()
threading.Thread(target = ScanHigh).start()

e = a + b

while e < 2000:
    f = raw_input()

End = time.time() - Start
print c
print d
print End

g = raw_input()

Answer 1

這是您的代碼失敗的地方。

threading.Thread(target = ScanLow).start()
threading.Thread(target = ScanHigh).start()

e = a + b

while e < 2000:
   f = raw_input()

啟動線程后，立即將值設置為e 。 但是，之后你永遠不會更新e ，因此循環永遠不會退出。

你似乎也要等到兩個線程都完成了。 join()方法是一種更好的方法。

from threading import Thread
threads = []
threads.append(Thread(target = ScanLow))
threads.append(Thread(target = ScanHigh))
for thread in threads:
  thread.start()
//both threads are running
for thread in threads:
  thread.join()
//both threads have stopped

編輯：與您的問題無關，但是有用的評論。 兩個掃描功能都完全相同。 您可以使用一個將掃描范圍作為參數的函數替換它們，並使用一個函數啟動兩個線程。

from threading import Thread
def Scan(start, stop):
    global a
    global c

    for i in range(start, stop):  
        s = socket(AF_INET, SOCK_STREAM)  
        result = s.connect_ex((TargetIP, i))  

        if(result == 0) :  
            c = "Port %d: OPEN\n" % (i,)  

        s.close()  
        a += 1

threadCount = 2
totalPorts = 2000
threads = []
for start in xrange(0, totalPorts, totalPorts/threadCount):
    threads.append(Thread(target = Scan, args = (start, totalPorts/threadCount)))

for thread in threads:
  thread.start()
//both threads are running
for thread in threads:
  thread.join()
//both threads have stopped

現在，您可以輕松調整要掃描的線程和端口數。

Answer 2

你有一個監控線程的笨拙方法。 使用join將指示線程何時完成。 沒有理由不剝離更多的線程來獲得更快的結果：

import threading
import socket
import time

ports = []
def check_port(ip,port):
    s = socket.socket()
    if s.connect_ex((ip,port)) == 0:
        ports.append(port)
    s.close()

target = raw_input('Target? ')
s = time.time()
threads = []
for port in range(2000):
    t = threading.Thread(target=check_port,args=(target,port))
    t.start()
    threads.append(t)
for t in threads:
    t.join()
print ports
print time.time() - s

產量

[80, 135, 445, 1028]
6.92199993134