53 lines
1.3 KiB
Python
53 lines
1.3 KiB
Python
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from sys import argv
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import argparse
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import ipaddress
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import random
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#import getopt #option function
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parser = argparse.ArgumentParser(description="Generating IPv6 networks")
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parser.add_argument('--size', help="size")
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parser.add_argument('string', nargs='+', help="network")
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try:
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args = parser.parse_args()
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if argv[1] == '--size':
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ipnet = argv[3]
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size = 128 - int(argv[2])
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else:
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if len(argv) > 2 :
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ipnet = argv[1]
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size = 128 - int(argv[2])
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else:
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ipnet = argv[1]
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size = 80
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ip = ipnet.split('/')
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ip2 = ipaddress.ip_network(ip[0]).supernet(new_prefix=int(ip[1]))
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# minimum network
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minNet = ipaddress.ip_network(ip[0]).supernet(new_prefix=128-size)
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# seperate network
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ip2first = ipaddress.IPv6Network(ip2)[0]
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ip2last = ipaddress.IPv6Network(ip2)[-1]
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minNetlast = ipaddress.IPv6Network(minNet)[-1]
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# calculation network
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maxRan = int(ip2last) - int(minNetlast) >> size
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result = ipaddress.ip_address((random.randrange(0,maxRan) << size) + int(ip2first) )
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resultNetwork = ipaddress.ip_network(result).supernet(new_prefix=128-size)
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print(resultNetwork)
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except:
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info="""
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wrong input
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ex) --size 64 2001:db8::/40
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or 2001:db8::/40 64
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or 2001:db8::/40 #default size 48
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"""
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print(info)
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