On Mon, 10 Jun 2013, Dan Cook wrote:
> I am trying to write a very simple ipset program using libipset on
> Ubuntu 12.04 (precise). I have libipset-dev installed and the
> following program fails to link.
>
> #include <assert.h> /* assert */
> #include <ctype.h> /* isspace */
> #include <errno.h> /* errno */
> #include <stdarg.h> /* va_* */
> #include <stdbool.h> /* bool */
> #include <stdio.h> /* fprintf, fgets */
> #include <stdlib.h> /* exit */
> #include <string.h> /* str* */
>
> #include <libipset/data.h> /* enum ipset_data */
> #include <libipset/parse.h> /* ipset_parse_* */
> #include <libipset/session.h> /* ipset_session_* */
> #include <libipset/types.h> /* struct ipset_type */
> #include <libipset/ui.h> /* core options, commands */
> #include <libipset/utils.h> /* STREQ */
>
> int main(int argc, char *argv[]) {
>
> struct ipset_session *session;
>
> session = ipset_session_init(printf);
> if (session == NULL) {
> fprintf(stderr, "Cannot initialize ipset session, aborting.\n");
> return -1;
> }
>
> ipset_session_fini(session);
>
> return 0;
> }
>
> $ gcc ipsetTest.c -lipset -lmnl -o ipsetTest
> /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/libipset.so:
> undefined reference to `ipset_port_usage'
> collect2: ld returned 1 exit status
This compiles cleanly with a more recent ipset library.
> I can not install a new kernel module or over write the system library
> of libipset, this has to work with the kernel modules already
> installed on customer machines.
>
> I could however build a custom version of the library and reference it
> from our executable, but it has to be compatible with the kernel
> version installed in 12.04.
Yes, you can install a custom library for example in /usr/local and use
it. The userspace ipset library and program is independent from the kernel
part modules: they'll negotiate the best common functionality and will use
that.
> Is libipset broken on 12.04? How do I fix it - can I patch a version
> to work w/ 12.04?
> 12.04 reports ipset version 6.11 protocol version 6.
The function ipset_port_usage was missing from the library, it was fixed
in 6.12. You can find the patch in git, but it's easier to use a more
recent package and the library from it.
Best regards,
Jozsef
-
E-mail : kadlec@xxxxxxxxxxxxxxxxx, kadlecsik.jozsef@xxxxxxxxxxxxx
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Address : Wigner Research Centre for Physics, Hungarian Academy of Sciences
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