Hello,
I'm currently introducing myself into kernel development, and I decided
to give building an xtables module a try. I'm trying to write a very
simple arptable modules which checks whether an ARP requests comes from
a given IP.
I've built the kernel module and the userspace library, but arptables
seems to ignore it (module's name is arpway):
[root@Archpv3]# ~> arptables -F
[root@Archpv3]# ~> arptables -A INPUT -m arpway -j ACCEPT
[root@Archpv3]# ~> arptables-save
*filter
:INPUT ACCEPT
:OUTPUT ACCEPT
:FORWARD ACCEPT
-A INPUT -j ACCEPT
also, `arptables -m arpway -h` does not print my module's help text.
Just to check, if I change the module's scope to ipv4 (setting
`xtables_match.family` to `NFPROTO_IPV4`), module's help is successfully
printed with `iptables -m arpway -h`, and adding the rule and then
printing it works.
Needless to say, module is successfully complied and `insmod`'ed, and
userspace library is placed in `/usr/lib/iptables/libxt_arpway.so`.
Am I doing something wrong, or does arptables not support dynamic
extensions/modules like iptables does?
Regards and thanks in advance, Roberto.
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