error while running the example about python-iptables

[ldx]

Can you paste the actual code?

[nashrafeeg]

   import iptc
   chain = iptc.Chain(iptc.TABLE_NAT, "POSTROUTING")
   rule = iptc.Rule()
   rule.protocol = "tcp"
   rule.out_interface = "eth0"
   target = iptc.Target(rule, "MASQUERADE")
   target.to_ports = "1234"
   rule.target = target
   chain.insert_rule(rule)

i got the code from http://nilvec.com/stuff/python-iptables/docs/html/examples.html#simple-rule-not-using-any-match-extensions

[ldx]

Can you tell me the version of your OS and iptables? Do you use the latest python-iptables from github?

[nashrafeeg]

Ubuntu 12.04 iptables v1.4.12. yes i cloned the code from here and ran setup.py

[ldx]

Some of the core structures in iptables have changed. Let me take some time to figure out how python-iptables can use them without breaking compatibility with older versions.

[juanluisbaptiste]

I have this issue too, any ETA on when it's going to be fixed ?

Thanks.

[faddy]

Hi,
I am facing the same issue with same iptables (1.4.12) and python-iptables (0.1.1) versions on Ubuntu 12.04.
Can you please tell us if you are working on this?
I can also work on a patch... Can you give me some hint/suggestion on how to tackle this?

Thanks for putting this library out there!

[ldx]

See #13 for a patch (not fully functional, needs some more work it seems).

[juanluisbaptiste]

Hi,

I'm very new with git and github, can you please explain me how to get the patch for this issue ?

Thanks.

[juanluisbaptiste]

Ok, I cloned hach-que/python-iptables and tried to build it but I think it is missing a file:

[mageia@dci-laptop hach-que-python-iptables (master)]$ python setup.py build
running build
running build_py
creating build
creating build/lib.linux-x86_64-2.7
creating build/lib.linux-x86_64-2.7/iptc
copying iptc/xtables.py -> build/lib.linux-x86_64-2.7/iptc
copying iptc/version.py -> build/lib.linux-x86_64-2.7/iptc
copying iptc/init.py -> build/lib.linux-x86_64-2.7/iptc
warning: build_py: byte-compiling is disabled, skipping.

running build_ext
building 'libxtwrapper' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/libxtwrapper
gcc -pthread -fno-strict-aliasing -O2 -g -pipe -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4 -I/usr/include/ncursesw -DNDEBUG -O2 -g -pipe -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4 -g -fPIC -I/usr/include/python2.7 -c libxtwrapper/wrapper.c -o build/temp.linux-x86_64-2.7/libxtwrapper/wrapper.o -g -O0
libxtwrapper/wrapper.c:6:44: fatal error: ../iptables/include/xtables.h.in: No such file or directory
compilation terminated.
error: command 'gcc' failed with exit status 1

[ldx]

Yes, modify that line to "#include <xtables.h>", and make sure the iptables-dev package (on Ubuntu) is installed.

[juanluisbaptiste]

Ok I'm not sure what you mean with "modify that line to "#include"", but I changed that include to "#include "xtables.h" and now the error changed to this:

gcc -pthread -shared -Wl,--as-needed -Wl,--no-undefined -Wl,-z,relro -Wl,-O1 -Wl,--build-id -Wl,--enable-new-dtags build/temp.linux-x86_64-2.7/libxtwrapper/wrapper.o -L/usr/lib64 -lpython2.7 -o build/lib.linux-x86_64-2.7/libxtwrapper.so -g -O0
build/temp.linux-x86_64-2.7/libxtwrapper/wrapper.o: In function wrap_mpcall': /home/mageia/git/hach-que-python-iptables/libxtwrapper/wrapper.c:71: undefined reference toxtables_option_mpcall'
build/temp.linux-x86_64-2.7/libxtwrapper/wrapper.o: In function wrap_tpcall': /home/mageia/git/hach-que-python-iptables/libxtwrapper/wrapper.c:87: undefined reference toxtables_option_tpcall'
collect2: ld returned 1 exit status
error: command 'gcc' failed with exit status 1

I'm on Mageia 2 with iptables-devel-1.4.12.2-2 installed.

btw, I maintain python-iptables for Mageia and I'm also have a package for OpenSUSE that I want to get included.

[ldx]

If you have python-iptables already installed, first remove it. You should also use '#include <xtables.h>', not '#include "xtables.h"'. Let me know if this helps - for me it compiles with iptables v1.4.12.

[juanluisbaptiste]

Yes, I had python-iptables removed, I really don't understand what you mean with the include statement, of course if I leave only:

#include

compilation will fail as it is an incomplete #include statement.

[ldx]

Sorry, it should be #include <xtables.h>.

[juanluisbaptiste]

On Mon, Oct 15, 2012 at 3:34 AM, ldx [email protected] wrote:

Sorry, it should be #include <xtables.h>.

I tried that too and the error is still the same. This is with iptables
1.4.12.

[juanluisbaptiste]

Ok, the problem was a missing linker flag to link against libxtables. I created a pull request to merge this fix and the previous one about the wrong include for xtables.h on libxtwrapper/wrapper.c:

hach-que#1

[juanluisbaptiste]

Ok, I tested again with the hach-que/python-iptables fork and this issue is still present:

chain = iptc.Chain(iptc.TABLE_FILTER, "INPUT")
rule = iptc.Rule()
rule.protocol = "tcp"
rule.in_interface = "eth+"
rule.src = "10.0.2.2"
rule.dst = "10.1.1.1" 
target = iptc.Target(rule, "DROP")
target.to_ports = str(666)    
rule.target = target
chain.insert_rule(rule)

Produces the same error:

Traceback (most recent call last):
  File "test/iptables_add.py", line 19, in <module>
    target.to_ports = str(666)
  File "/usr/lib64/python2.7/site-packages/iptc/__init__.py", line 410, in __setattr__
    self.parse(name.replace("_", "-"), value)
  File "/usr/lib64/python2.7/site-packages/iptc/__init__.py", line 376, in parse
    (self._module.name, parameter))
AttributeError: standard: invalid parameter to-ports

[ldx]

See the other tickets, iptables 1.4 introduced new module callbacks - we're not compatible with it yet.

[ldx]

Please take a look at HEAD, and open a new ticket if you still experience issues. The new iptables API is now supported by python-iptables (see http://nilvec.com/python-iptables-update/ for further info).