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import subprocess
import pf
"""
Doing this the "right" way by using DIOCNATLOOK on the pf device turns out
to be a pain. Apple has made a number of modifications to the data
structures returned, and compiling userspace tools to test and work with
this turns out to be a pain in the ass. Parsing pfctl output is short,
simple, and works.
Note: Also Tested with FreeBSD 10 pkgng Python 2.7.x.
Should work almost exactly as on Mac OS X and except with some changes to
the output processing of pfctl (see pf.py).
"""
class Resolver(object):
STATECMD = ("sudo", "-n", "/sbin/pfctl", "-s", "state")
def original_addr(self, csock):
peer = csock.getpeername()
try:
stxt = subprocess.check_output(self.STATECMD, stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as e:
if "sudo: a password is required" in e.output:
insufficient_priv = True
else:
raise RuntimeError("Error getting pfctl state: " + repr(e))
else:
insufficient_priv = "sudo: a password is required" in stxt
if insufficient_priv:
raise RuntimeError(
"Insufficient privileges to access pfctl. "
"See http://mitmproxy.org/doc/transparent/osx.html for details.")
return pf.lookup(peer[0], peer[1], stxt)
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