mirror of
https://github.com/sshuttle/sshuttle.git
synced 2024-11-21 23:43:18 +01:00
107 lines
3.3 KiB
Python
107 lines
3.3 KiB
Python
import sys, os, re, socket, zlib
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import compat.ssubprocess as ssubprocess
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import helpers
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from helpers import *
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def readfile(name):
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basedir = os.path.dirname(os.path.abspath(sys.argv[0]))
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path = [basedir] + sys.path
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for d in path:
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fullname = os.path.join(d, name)
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if os.path.exists(fullname):
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return open(fullname, 'rb').read()
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raise Exception("can't find file %r in any of %r" % (name, path))
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def empackage(z, filename, data=None):
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(path,basename) = os.path.split(filename)
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if not data:
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data = readfile(filename)
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content = z.compress(data)
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content += z.flush(zlib.Z_SYNC_FLUSH)
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return '%s\n%d\n%s' % (basename, len(content), content)
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def connect(ssh_cmd, rhostport, python, stderr, options):
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main_exe = sys.argv[0]
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portl = []
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rhostIsIPv6 = False
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if (rhostport or '').count(':') > 1:
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rhostIsIPv6 = True
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if rhostport.count(']') or rhostport.count('['):
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result = rhostport.split(']')
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rhost = result[0].strip('[')
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if len(result) > 1:
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result[1] = result[1].strip(':')
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if result[1] is not '':
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portl = ['-p', str(int(result[1]))]
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else: # can't disambiguate IPv6 colons and a port number. pass the hostname through.
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rhost = rhostport
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else: # IPv4
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l = (rhostport or '').split(':', 1)
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rhost = l[0]
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if len(l) > 1:
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portl = ['-p', str(int(l[1]))]
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if rhost == '-':
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rhost = None
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ipv6flag = []
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if rhostIsIPv6:
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ipv6flag = ['-6']
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z = zlib.compressobj(1)
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content = readfile('assembler.py')
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optdata = ''.join("%s=%r\n" % (k,v) for (k,v) in options.items())
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content2 = (empackage(z, 'cmdline_options.py', optdata) +
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empackage(z, 'helpers.py') +
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empackage(z, 'compat/ssubprocess.py') +
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empackage(z, 'ssnet.py') +
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empackage(z, 'hostwatch.py') +
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empackage(z, 'server.py') +
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"\n")
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pyscript = r"""
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import sys;
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skip_imports=1;
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verbosity=%d;
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exec compile(sys.stdin.read(%d), "assembler.py", "exec")
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""" % (helpers.verbose or 0, len(content))
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pyscript = re.sub(r'\s+', ' ', pyscript.strip())
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if not rhost:
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# ignore the --python argument when running locally; we already know
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# which python version works.
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argv = [sys.argv[1], '-c', pyscript]
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else:
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if ssh_cmd:
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sshl = ssh_cmd.split(' ')
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else:
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sshl = ['ssh']
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if python:
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pycmd = "'%s' -c '%s'" % (python, pyscript)
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else:
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pycmd = ("P=python2; $P -V 2>/dev/null || P=python; "
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"\"$P\" -c '%s'") % pyscript
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argv = (sshl +
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portl +
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ipv6flag +
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[rhost, '--', pycmd])
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(s1,s2) = socket.socketpair()
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def setup():
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# runs in the child process
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s2.close()
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s1a,s1b = os.dup(s1.fileno()), os.dup(s1.fileno())
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s1.close()
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debug2('executing: %r\n' % argv)
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p = ssubprocess.Popen(argv, stdin=s1a, stdout=s1b, preexec_fn=setup,
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close_fds=True, stderr=stderr)
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os.close(s1a)
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os.close(s1b)
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s2.sendall(content)
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s2.sendall(content2)
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return p, s2
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