xtables symbol error with Debian 6

[nosmo]

Hey there,

Big fan of the module. I've been developing on Debian 7 with no problems, but I've had to make my code compatible with Debian 6. Unfortunately Debian 6's xtables seems to lack the xtables_pending_matches (and xtables_pending_targets) symbol and this causes iptc to fail to import as follows:

>>> import iptc
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/local/lib/python2.6/dist-packages/iptc/__init__.py", line 10, in 
    from ip4tc import (is_table_available, Table, Chain, Rule, Match, Target,
  File "/usr/local/lib/python2.6/dist-packages/iptc/ip4tc.py", line 12, in 
    from xtables import (XT_INV_PROTO, NFPROTO_IPV4, XTablesError, xtables,
  File "/usr/local/lib/python2.6/dist-packages/iptc/xtables.py", line 746, in 
    class xtables(object):
  File "/usr/local/lib/python2.6/dist-packages/iptc/xtables.py", line 766, in xtables
    "xtables_pending_matches"))
ValueError: /lib/libxtables.so.4: undefined symbol: xtables_pending_matches
>>>

I'm trying to backport Wheezy's xtables packages, but can python-iptables function without this symbol? I've commented the references to it out and I don't seem to be hitting any major issues but I'm curious/worried as to whether this will bite me further down the line. For reference this issue appears in the current git HEAD.
Thanks!

[ldx]

If the test suite does not complain then you're probably fine. Is it only xtables_pending_matches(), or xtables_pending_targets() too missing from libxtables?

[nosmo]

Both xtables_pending_matches and xtables_pending_targets are missing from the object file

The test suite returns three failures:

======================================================================
ERROR: test_target_parameters (iptc.test.test_targets.TestTarget)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/root/python-iptables/iptc/test/test_targets.py", line 45, in test_target_parameters
    t.nfmask = "0xdeadbeef"
  File "/root/python-iptables/iptc/ip4tc.py", line 358, in __setattr__
    self.parse(name.replace("_", "-"), value)
  File "/root/python-iptables/iptc/ip4tc.py", line 277, in parse
    self._parse(argv, inv, entry)
  File "/root/python-iptables/iptc/ip4tc.py", line 596, in _parse
    ct.cast(self._ptrptr, ct.POINTER(ct.c_void_p)))
  File "/root/python-iptables/iptc/xtables.py", line 737, in new
    ret = fn(*args)
  File "/root/python-iptables/iptc/xtables.py", line 987, in parse_target
    self._parse(t, argv, invert, flags, fw, ptr)
  File "/root/python-iptables/iptc/xtables.py", line 939, in _parse
    raise ValueError("invalid value %s" % (argv[1]))
ValueError: invalid value 0xdeadbeef
======================================================================
ERROR: test_insert (iptc.test.test_targets.TestXTClusteripTarget)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/root/python-iptables/iptc/test/test_targets.py", line 104, in test_insert
    self.target.hashmode = "sourceip"
  File "/root/python-iptables/iptc/ip4tc.py", line 358, in __setattr__
    self.parse(name.replace("_", "-"), value)
  File "/root/python-iptables/iptc/ip4tc.py", line 277, in parse
    self._parse(argv, inv, entry)
  File "/root/python-iptables/iptc/ip4tc.py", line 596, in _parse
    ct.cast(self._ptrptr, ct.POINTER(ct.c_void_p)))
  File "/root/python-iptables/iptc/xtables.py", line 737, in new
    ret = fn(*args)
  File "/root/python-iptables/iptc/xtables.py", line 987, in parse_target
    self._parse(t, argv, invert, flags, fw, ptr)
  File "/root/python-iptables/iptc/xtables.py", line 939, in _parse
    raise ValueError("invalid value %s" % (argv[1]))
ValueError: invalid value sourceip
======================================================================
ERROR: test_mode (iptc.test.test_targets.TestXTClusteripTarget)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/root/python-iptables/iptc/test/test_targets.py", line 88, in test_mode
    self.target.hashmode = hashmode
  File "/root/python-iptables/iptc/ip4tc.py", line 358, in __setattr__
    self.parse(name.replace("_", "-"), value)
  File "/root/python-iptables/iptc/ip4tc.py", line 277, in parse
    self._parse(argv, inv, entry)
  File "/root/python-iptables/iptc/ip4tc.py", line 596, in _parse
    ct.cast(self._ptrptr, ct.POINTER(ct.c_void_p)))
  File "/root/python-iptables/iptc/xtables.py", line 737, in new
    ret = fn(*args)
  File "/root/python-iptables/iptc/xtables.py", line 987, in parse_target
    self._parse(t, argv, invert, flags, fw, ptr)
  File "/root/python-iptables/iptc/xtables.py", line 939, in _parse
    raise ValueError("invalid value %s" % (argv[1]))
ValueError: invalid value sourceip
----------------------------------------------------------------------

[ldx]

These should be okay - you just have an old revision of these two extensions, not accepting certain values or lacking features.

[nosmo]

Awesome, thanks for clearing that up! :) I'll close this out, thanks for the help.