mirror of
https://github.com/sshuttle/sshuttle.git
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76 lines
1.5 KiB
Python
76 lines
1.5 KiB
Python
import sys, os, socket
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logprefix = ''
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verbose = 0
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def log(s):
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try:
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sys.stdout.flush()
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sys.stderr.write(logprefix + s)
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sys.stderr.flush()
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except IOError:
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# this could happen if stderr gets forcibly disconnected, eg. because
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# our tty closes. That sucks, but it's no reason to abort the program.
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pass
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def debug1(s):
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if verbose >= 1:
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log(s)
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def debug2(s):
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if verbose >= 2:
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log(s)
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def debug3(s):
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if verbose >= 3:
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log(s)
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class Fatal(Exception):
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pass
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def list_contains_any(l, sub):
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for i in sub:
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if i in l:
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return True
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return False
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def resolvconf_nameservers():
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l = []
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for line in open('/etc/resolv.conf'):
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words = line.lower().split()
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if len(words) >= 2 and words[0] == 'nameserver':
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l.append(words[1])
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return l
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def resolvconf_random_nameserver():
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l = resolvconf_nameservers()
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if l:
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if len(l) > 1:
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# don't import this unless we really need it
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import random
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random.shuffle(l)
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return l[0]
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else:
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return '127.0.0.1'
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def islocal(ip):
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sock = socket.socket()
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try:
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try:
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sock.bind((ip, 0))
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except socket.error, e:
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if e.args[0] == errno.EADDRNOTAVAIL:
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return False # not a local IP
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else:
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raise
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finally:
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sock.close()
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return True # it's a local IP, or there would have been an error
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