Python - Making Fast Port Scanner

Question

Więc robię skaner portów w python ...

import socket 
ip = "External IP" 
s = socket.socket(2, 1) #socket.AF_INET, socket.SOCK_STREAM 

def porttry(ip, port): 
    try: 
     s.connect((ip, port)) 
     return True 
    except: 
     return None 

for port in range(0, 10000): 
    value = porttry(ip, port) 
    if value == None: 
     print("Port not opened on %d" % port) 
    else: 
     print("Port opened on %d" % port) 
     break 
raw_input() 

Ale to jest zbyt powolny, chcę jakoś móc niektóre, jak blisko lub złamać kod po okres nie zwracania niczego. Jeśli nie jest to możliwe, proszę mi pomóc albo sposób

Answer 1

Oprócz ustawiania limitu czasu gniazda, można również zastosować technikę wielowątkowości do turbo pobudza proces. W najlepszym przypadku N będzie szybszy, gdy masz do przeskanowania N portów.

# This script runs on Python 3 
import socket, threading 


def TCP_connect(ip, port_number, delay, output): 
    TCPsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    TCPsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 
    TCPsock.settimeout(delay) 
    try: 
     TCPsock.connect((ip, port_number)) 
     output[port_number] = 'Listening' 
    except: 
     output[port_number] = '' 



def scan_ports(host_ip, delay): 

    threads = []  # To run TCP_connect concurrently 
    output = {}   # For printing purposes 

    # Spawning threads to scan ports 
    for i in range(10000): 
     t = threading.Thread(target=TCP_connect, args=(host_ip, i, delay, output)) 
     threads.append(t) 

    # Starting threads 
    for i in range(10000): 
     threads[i].start() 

    # Locking the script until all threads complete 
    for i in range(10000): 
     threads[i].join() 

    # Printing listening ports from small to large 
    for i in range(10000): 
     if output[i] == 'Listening': 
      print(str(i) + ': ' + output[i]) 



def main(): 
    host_ip = input("Enter host IP: ") 
    delay = int(input("How many seconds the socket is going to wait until timeout: ")) 
    scan_ports(host_ip, delay) 

if __name__ == "__main__": 
    main() 

Answer 2

myślę, że ten fragment mógłby pomóc: http://www.coderholic.com/python-port-scanner/

Answer 3

rozważyć ustawienie timeout zamiast do pętli przy użyciu socket.setdefaulttimeout(timeout).

Answer 4

socket.setdefaulttimeout (0.5) Spowoduje to, że program będzie szybszy!

Answer 5

socket.setdefualttimeout (czas)

służy próbować połączyć się z portem dla perticular czasu ... po wysłaniu żądania i nie ma czasu ustawionego przez 2 sekundy, więc będzie starał się połączyć z portem dla 2 sekundy .... jeśli nie będzie odpowiedzi z tego portu w ciągu 2 sekund .... będzie to liczone jako martwy port

Answer 6

To powinno być trochę szybciej.

#-*-coding:utf8;-*- 
#qpy:3 
#qpy:console 

import socket 
import os 

# This is used to set a default timeout on socket 
# objects. 
DEFAULT_TIMEOUT = 0.5 

# This is used for checking if a call to socket.connect_ex 
# was successful. 
SUCCESS = 0 

def check_port(*host_port, timeout=DEFAULT_TIMEOUT): 
    ''' Try to connect to a specified host on a specified port. 
    If the connection takes longer then the TIMEOUT we set we assume 
    the host is down. If the connection is a success we can safely assume 
    the host is up and listing on port x. If the connection fails for any 
    other reason we assume the host is down and the port is closed.''' 

    # Create and configure the socket. 
    sock = socket.socket() 
    sock.settimeout(timeout) 

    # the SO_REUSEADDR flag tells the kernel to reuse a local 
    # socket in TIME_WAIT state, without waiting for its natural 
    # timeout to expire. 
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 

    # Like connect(address), but return an error indicator instead 
    # of raising an exception for errors returned by the C-level connect()  
    # call (other problems, such as “host not found,” can still raise exceptions). 
    # The error indicator is 0 if the operation succeeded, otherwise the value of 
    # the errnovariable. This is useful to support, for example, asynchronous connects. 
    connected = sock.connect_ex(host_port) is SUCCESS 

    # Mark the socket closed. 
    # The underlying system resource (e.g. a file descriptor) 
    # is also closed when all file objects from makefile() are closed. 
    # Once that happens, all future operations on the socket object will fail. 
    # The remote end will receive no more data (after queued data is flushed). 
    sock.close() 

    # return True if port is open or False if port is closed. 
    return connected 


con = check_port('www.google.com', 83) 
print(con)