libiptc ... and matches , seg fault

[Francesco Ciocchetti <primero@fastwebnet.it>]

Hi all ML.

I'm tryng to develop a small apps with libiptc copyng as much as
possible from iptables.c

i'm getting a segmentation fault when i call find_match with 'tcp' as
argument.

searching with gdb i found that :

my segfault arrives when in register_match

if (strcmp(me->version, program_version) != 0) (line 1052 of iptables.c
1.2.11)

Program received signal SIGSEGV, Segmentation fault.
0x0ff0b824 in strcmp () from /lib/tls/libc.so.6
(gdb) where
#0  0x0ff0b824 in strcmp () from /lib/tls/libc.so.6
#1  0x100083e8 in register_match ()
#2  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#3  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#4  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#5  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#6  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#7  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#8  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#9  0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#10 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#11 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#12 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#13 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#14 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#15 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#16 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#17 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#18 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#19 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
#20 0x0fe53584 in _init () from /lib/iptables/libipt_tcp.so
Previous frame inner to this frame (corrupt stack?)

If i missed some info don't esiatate to ask :)

anyone has some hints?

thx
Francesco