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25 lines
766 B
Python
25 lines
766 B
Python
import sys
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def lookup(address, port, s):
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"""
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Parse the pfctl state output s, to look up the destination host
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matching the client (address, port).
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Returns an (address, port) tuple, or None.
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"""
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spec = "%s:%s" % (address, port)
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for i in s.split("\n"):
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if "ESTABLISHED:ESTABLISHED" in i and spec in i:
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s = i.split()
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if len(s) > 4:
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if sys.platform.startswith("freebsd"):
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# strip parentheses for FreeBSD pfctl
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s = s[3][1:-1].split(":")
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else:
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s = s[4].split(":")
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if len(s) == 2:
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return s[0], int(s[1])
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raise RuntimeError("Could not resolve original destination.")
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