55b69e9104
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>
43 lines
970 B
C
43 lines
970 B
C
/* This is a module which is used to mark packets for tracing.
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netfilter/x_tables.h>
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MODULE_DESCRIPTION("Xtables: packet flow tracing");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("ipt_TRACE");
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MODULE_ALIAS("ip6t_TRACE");
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static unsigned int
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trace_tg(struct sk_buff *skb, const struct net_device *in,
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const struct net_device *out, unsigned int hooknum,
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const struct xt_target *target, const void *targinfo)
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{
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skb->nf_trace = 1;
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return XT_CONTINUE;
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}
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static struct xt_target trace_tg_reg __read_mostly = {
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.name = "TRACE",
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.revision = 0,
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.family = NFPROTO_UNSPEC,
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.table = "raw",
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.target = trace_tg,
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.me = THIS_MODULE,
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};
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static int __init trace_tg_init(void)
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{
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return xt_register_target(&trace_tg_reg);
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}
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static void __exit trace_tg_exit(void)
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{
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xt_unregister_target(&trace_tg_reg);
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}
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module_init(trace_tg_init);
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module_exit(trace_tg_exit);
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