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78 lines
2.8 KiB
78 lines
2.8 KiB
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import time
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import psutil
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import random
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import hashlib
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from IPy import IP
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from Basis.Logger import logging
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def md5Sum(data: str, encode: str = 'UTF-8') -> str:
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return hashlib.md5(data.encode(encoding = encode)).hexdigest()
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def ipFormat(ipAddr: str, v6Bracket: bool = False) -> str:
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ip = IP(ipAddr)
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if v6Bracket and ip.version() == 6:
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return '[%s]' % str(ip) # [IPv6]
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return str(ip) # IPv4 / IPV6
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def genFlag(length: int = 12) -> str: # generate random task flag
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flag = ''
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for i in range(0, length):
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tmp = random.randint(0, 15)
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if tmp >= 10:
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flag += chr(tmp + 87) # a ~ f
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else:
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flag += str(tmp) # 0 ~ 9
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logging.debug('generate new flag -> ' + flag)
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return flag
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def getAvailablePort(rangeStart: int = 1024, rangeEnd: int = 65535, waitTime: int = 10) -> int: # get available port
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if rangeStart > rangeEnd or rangeStart < 1 or rangeEnd > 65535:
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raise RuntimeError('invalid port range')
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while True:
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port = random.randint(rangeStart, rangeEnd) # choose randomly
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if checkPortStatus(port):
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logging.debug('get new port -> %i' % port)
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return port
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time.sleep(waitTime / 1000) # ms -> s (default 10ms)
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def checkPortStatus(port: int) -> bool: # check if the port is occupied
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logging.debug('check status of port %i -> available' % port)
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for connection in networkStatus(): # scan every connections
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if connection['local']['port'] == port: # port occupied (whatever ipv4-tcp / ipv4-udp / ipv6-tcp / ipv6-udp)
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logging.debug('check status of port %i -> occupied' % port)
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return False
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return True
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def networkStatus() -> list: # get all network connections
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result = []
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for connection in psutil.net_connections():
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if not connection.family.name.startswith('AF_INET'): # AF_INET / AF_INET6
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continue
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if connection.type.name not in ['SOCK_STREAM', 'SOCK_DGRAM']: # TCP / UDP
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continue
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result.append({
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'fd': connection.fd,
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'family': 'ipv6' if connection.family.name[-1] == '6' else 'ipv4', # ip version
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'type': 'tcp' if connection.type.name == 'SOCK_STREAM' else 'udp', # tcp or udp
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'local': { # local bind address
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'addr': connection.laddr.ip,
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'port': connection.laddr.port,
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},
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'remote': { # remote address
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'addr': connection.raddr.ip,
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'port': connection.raddr.port,
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} if len(connection.raddr) != 0 else None,
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'status': connection.status,
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'pid': connection.pid, # process id
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})
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logging.debug('get network status -> found %i connections' % len(result))
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return result
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