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[NETFILTER]: xt_conntrack: add compat support 

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-05-10 14:17:58 -07:00 committed by David S. Miller
parent 802169a4b0
commit da0dd23143
1 changed files with 54 additions and 0 deletions
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54
net/netfilter/xt_conntrack.c
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@ -134,12 +134,66 @@ static void destroy(const struct xt_match *match, void *matchinfo)
nf_ct_l3proto_module_put(match->family);
}
#ifdef CONFIG_COMPAT
struct compat_xt_conntrack_info
{
compat_uint_t statemask;
compat_uint_t statusmask;
struct ip_conntrack_old_tuple tuple[IP_CT_DIR_MAX];
struct in_addr sipmsk[IP_CT_DIR_MAX];
struct in_addr dipmsk[IP_CT_DIR_MAX];
compat_ulong_t expires_min;
compat_ulong_t expires_max;
u_int8_t flags;
u_int8_t invflags;
};
static void compat_from_user(void *dst, void *src)
{
struct compat_xt_conntrack_info *cm = src;
struct xt_conntrack_info m = {
.statemask = cm->statemask,
.statusmask = cm->statusmask,
.expires_min = cm->expires_min,
.expires_max = cm->expires_max,
.flags = cm->flags,
.invflags = cm->invflags,
};
memcpy(m.tuple, cm->tuple, sizeof(m.tuple));
memcpy(m.sipmsk, cm->sipmsk, sizeof(m.sipmsk));
memcpy(m.dipmsk, cm->dipmsk, sizeof(m.dipmsk));
memcpy(dst, &m, sizeof(m));
}
static int compat_to_user(void __user *dst, void *src)
{
struct xt_conntrack_info *m = src;
struct compat_xt_conntrack_info cm = {
.statemask = m->statemask,
.statusmask = m->statusmask,
.expires_min = m->expires_min,
.expires_max = m->expires_max,
.flags = m->flags,
.invflags = m->invflags,
};
memcpy(cm.tuple, m->tuple, sizeof(cm.tuple));
memcpy(cm.sipmsk, m->sipmsk, sizeof(cm.sipmsk));
memcpy(cm.dipmsk, m->dipmsk, sizeof(cm.dipmsk));
return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
}
#endif
static struct xt_match conntrack_match = {
.name = "conntrack",
.match = match,
.checkentry = checkentry,
.destroy = destroy,
.matchsize = sizeof(struct xt_conntrack_info),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_conntrack_info),
.compat_from_user = compat_from_user,
.compat_to_user = compat_to_user,
#endif
.family = AF_INET,
.me = THIS_MODULE,
};