netfilter: implement NFPROTO_UNSPEC as a wildcard for extensions
When a match or target is looked up using xt_find_{match,target},
Xtables will also search the NFPROTO_UNSPEC module list. This allows
for protocol-independent extensions (like xt_time) to be reused from
other components (e.g. arptables, ebtables).
Extensions that take different codepaths depending on match->family
or target->family of course cannot use NFPROTO_UNSPEC within the
registration structure (e.g. xt_pkttype).
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/netfilter/xt_TRACE.c b/net/netfilter/xt_TRACE.c
index e1bcad5..da35f9f 100644
--- a/net/netfilter/xt_TRACE.c
+++ b/net/netfilter/xt_TRACE.c
@@ -19,31 +19,23 @@
return XT_CONTINUE;
}
-static struct xt_target trace_tg_reg[] __read_mostly = {
- {
- .name = "TRACE",
- .family = NFPROTO_IPV4,
- .target = trace_tg,
- .table = "raw",
- .me = THIS_MODULE,
- },
- {
- .name = "TRACE",
- .family = NFPROTO_IPV6,
- .target = trace_tg,
- .table = "raw",
- .me = THIS_MODULE,
- },
+static struct xt_target trace_tg_reg __read_mostly = {
+ .name = "TRACE",
+ .revision = 0,
+ .family = NFPROTO_UNSPEC,
+ .table = "raw",
+ .target = trace_tg,
+ .me = THIS_MODULE,
};
static int __init trace_tg_init(void)
{
- return xt_register_targets(trace_tg_reg, ARRAY_SIZE(trace_tg_reg));
+ return xt_register_target(&trace_tg_reg);
}
static void __exit trace_tg_exit(void)
{
- xt_unregister_targets(trace_tg_reg, ARRAY_SIZE(trace_tg_reg));
+ xt_unregister_target(&trace_tg_reg);
}
module_init(trace_tg_init);