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[NETFILTER]: ipt_hashlimit: add compat conversion functions

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Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-09-20 12:07:23 -07:00 committed by David S. Miller
parent 02c63cf777
commit 127f15dd65
1 changed files with 29 additions and 0 deletions
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29
net/ipv4/netfilter/ipt_hashlimit.c
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@ -535,10 +535,39 @@ hashlimit_destroy(const struct xt_match *match, void *matchinfo)
htable_put(r->hinfo);
}
#ifdef CONFIG_COMPAT
struct compat_ipt_hashlimit_info {
char name[IFNAMSIZ];
struct hashlimit_cfg cfg;
compat_uptr_t hinfo;
compat_uptr_t master;
};
static void compat_from_user(void *dst, void *src)
{
int off = offsetof(struct compat_ipt_hashlimit_info, hinfo);
memcpy(dst, src, off);
memset(dst + off, 0, sizeof(struct compat_ipt_hashlimit_info) - off);
}
static int compat_to_user(void __user *dst, void *src)
{
int off = offsetof(struct compat_ipt_hashlimit_info, hinfo);
return copy_to_user(dst, src, off) ? -EFAULT : 0;
}
#endif
static struct ipt_match ipt_hashlimit = {
.name = "hashlimit",
.match = hashlimit_match,
.matchsize = sizeof(struct ipt_hashlimit_info),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_ipt_hashlimit_info),
.compat_from_user = compat_from_user,
.compat_to_user = compat_to_user,
#endif
.checkentry = hashlimit_checkentry,
.destroy = hashlimit_destroy,
.me = THIS_MODULE