mirror of
https://github.com/sshuttle/sshuttle.git
synced 2024-11-22 16:03:57 +01:00
76 lines
2.5 KiB
Python
Executable File
76 lines
2.5 KiB
Python
Executable File
#!/usr/bin/env python
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import sys, re
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import options, client, iptables
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# list of:
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# 1.2.3.4/5 or just 1.2.3.4
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def parse_subnets(subnets_str):
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subnets = []
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for s in subnets_str:
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m = re.match(r'(\d+)\.(\d+)\.(\d+)\.(\d+)(?:/(\d+))?$', s)
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if not m:
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raise Exception('%r is not a valid IP subnet format' % s)
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(a,b,c,d,width) = m.groups()
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(a,b,c,d) = (int(a or 0), int(b or 0), int(c or 0), int(d or 0))
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if width == None:
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width = 32
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else:
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width = int(width)
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if a > 255 or b > 255 or c > 255 or d > 255:
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raise Exception('%d.%d.%d.%d has numbers > 255' % (a,b,c,d))
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if width > 32:
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raise Exception('*/%d is greater than the maximum of 32' % width)
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subnets.append(('%d.%d.%d.%d' % (a,b,c,d), width))
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return subnets
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# 1.2.3.4:567 or just 1.2.3.4 or just 567
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def parse_ipport(s):
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s = str(s)
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m = re.match(r'(?:(\d+)\.(\d+)\.(\d+)\.(\d+))?(?::)?(?:(\d+))?$', s)
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if not m:
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raise Exception('%r is not a valid IP:port format' % s)
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(a,b,c,d,port) = m.groups()
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(a,b,c,d,port) = (int(a or 0), int(b or 0), int(c or 0), int(d or 0),
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int(port or 0))
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if a > 255 or b > 255 or c > 255 or d > 255:
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raise Exception('%d.%d.%d.%d has numbers > 255' % (a,b,c,d))
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if port > 65535:
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raise Exception('*:%d is greater than the maximum of 65535' % port)
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if a == None:
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a = b = c = d = 0
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return ('%d.%d.%d.%d' % (a,b,c,d), port)
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optspec = """
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sshuttle [-l [ip:]port] [-r [username@]sshserver] <subnets...>
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sshuttle --iptables <port> <subnets...>
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sshuttle --server
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--
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l,listen= transproxy to this ip address and port number [default=0]
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r,remote= ssh hostname (and optional username) of remote sshuttle server
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server [internal use only]
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iptables [internal use only]
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"""
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o = options.Options('sshuttle', optspec)
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(opt, flags, extra) = o.parse(sys.argv[1:])
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if opt.server:
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o.fatal('server mode not implemented yet')
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sys.exit(1)
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elif opt.iptables:
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if len(extra) < 1:
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o.fatal('at least one argument expected')
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sys.exit(iptables.main(int(extra[0]),
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parse_subnets(extra[1:])))
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else:
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if len(extra) < 1:
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o.fatal('at least one argument expected')
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remotename = extra[0]
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if remotename == '' or remotename == '-':
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remotename = None
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sys.exit(client.main(parse_ipport(opt.listen or '0.0.0.0:1234'),
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remotename,
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parse_subnets(extra)))
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