forked from p15670423/monkey
80 lines
1.9 KiB
Python
80 lines
1.9 KiB
Python
import socket
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import select
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import logging
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import struct
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DEFAULT_TIMEOUT = 10
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BANNER_READ = 1024
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LOG = logging.getLogger(__name__)
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def struct_unpack_tracker(data, index, fmt):
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"""
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Unpacks a struct from the specified index according to specified format.
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Returns the data and the next index
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:param data: Buffer
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:param index: Position index
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:param fmt: Struct format
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:return: (Data, new index)
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"""
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unpacked = struct.unpack_from(fmt, data, index)
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return unpacked, struct.calcsize(fmt)
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def struct_unpack_tracker_string(data, index):
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"""
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Unpacks a null terminated string from the specified index
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Returns the data and the next index
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:param data: Buffer
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:param index: Position index
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:return: (Data, new index)
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"""
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ascii_len = data[index:].find('\0')
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fmt = "%ds" % ascii_len
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return struct_unpack_tracker(data,index,fmt)
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def check_port_tcp(ip, port, timeout=DEFAULT_TIMEOUT, get_banner=False):
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.settimeout(timeout)
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try:
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sock.connect((ip, port))
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except socket.timeout:
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return False, None
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except socket.error, exc:
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LOG.debug("Check port: %s:%s, Exception: %s", ip, port, exc)
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return False, None
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banner = None
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try:
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if get_banner:
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read_ready, _, _ = select.select([sock], [], [], timeout)
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if len(read_ready) > 0:
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banner = sock.recv(BANNER_READ)
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except:
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pass
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sock.close()
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return True, banner
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def check_port_udp(ip, port, timeout=DEFAULT_TIMEOUT):
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.settimeout(timeout)
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data = None
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is_open = False
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try:
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sock.sendto("-", (ip, port))
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data, _ = sock.recvfrom(BANNER_READ)
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is_open = True
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except:
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pass
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sock.close()
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return is_open, data
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