77 lines
1.9 KiB
Python
77 lines
1.9 KiB
Python
import struct
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import socket
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import threading
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import queue
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import logging
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from enum import Enum, auto
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logger = logging.getLogger(__name__)
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class PortState(Enum):
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OPEN = auto()
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CLOSED = auto()
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FILTERED = auto()
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class TCPScanner:
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def __init__(self, host, ports, timeout=5):
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self.host = host
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self.ports = ports
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self.timeout = timeout
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self.results = []
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self.q = queue.SimpleQueue()
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def scan(self, num_threads=5):
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for port in self.ports:
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self.q.put(port)
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threads = []
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for i in range(num_threads):
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t = threading.Thread(target=self.run)
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t.start()
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threads.append(t)
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for t in threads:
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t.join()
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return self.results
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def run(self):
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try:
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while True:
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self._scan(self.q.get(block=False))
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except queue.Empty:
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return
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def _scan(self, port):
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try:
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conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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conn.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, struct.pack("ii", 1, 0))
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conn.settimeout(self.timeout)
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ret = conn.connect_ex((self.host, port))
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# DATA RECEIVED - SYN ACK
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if ret == 0:
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logger.debug('%s:%d - tcp open (SYN-ACK packet)' % (self.host, port))
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self.results.append((port, PortState.OPEN))
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# RST RECEIVED - PORT CLOSED
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elif ret == 111:
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logger.debug('%s:%d - tcp closed (RST packet)' % (self.host, port))
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self.results.append((port, PortState.CLOSED))
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# ERR CODE 11 - TIMEOUT
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elif ret == 11:
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self.results.append((port, PortState.FILTERED))
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else:
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logger.debug('%s:%d - code %d' % (self.host, port, ret))
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conn.close()
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except socket.timeout:
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self.results.append((port, PortState.FILTERED))
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