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-rw-r--r--net/netfilter/xt_conntrack.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c
index f4ea8fe07a5..189ded5f378 100644
--- a/net/netfilter/xt_conntrack.c
+++ b/net/netfilter/xt_conntrack.c
@@ -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,
};