1 files changed, 90 insertions, 0 deletions
diff --git a/net/netfilter/utils.c b/net/netfilter/utils.c
new file mode 100644
index 000000000000..0b660c568156
--- /dev/null
+++ b/net/netfilter/utils.c
@@ -0,0 +1,90 @@
+#include <linux/kernel.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <net/netfilter/nf_queue.h>
+
+__sum16 nf_checksum(struct sk_buff *skb, unsigned int hook,
+		    unsigned int dataoff, u_int8_t protocol,
+		    unsigned short family)
+{
+	const struct nf_ipv6_ops *v6ops;
+	__sum16 csum = 0;
+
+	switch (family) {
+	case AF_INET:
+		csum = nf_ip_checksum(skb, hook, dataoff, protocol);
+		break;
+	case AF_INET6:
+		v6ops = rcu_dereference(nf_ipv6_ops);
+		if (v6ops)
+			csum = v6ops->checksum(skb, hook, dataoff, protocol);
+		break;
+	}
+
+	return csum;
+}
+EXPORT_SYMBOL_GPL(nf_checksum);
+
+__sum16 nf_checksum_partial(struct sk_buff *skb, unsigned int hook,
+			    unsigned int dataoff, unsigned int len,
+			    u_int8_t protocol, unsigned short family)
+{
+	const struct nf_ipv6_ops *v6ops;
+	__sum16 csum = 0;
+
+	switch (family) {
+	case AF_INET:
+		csum = nf_ip_checksum_partial(skb, hook, dataoff, len,
+					      protocol);
+		break;
+	case AF_INET6:
+		v6ops = rcu_dereference(nf_ipv6_ops);
+		if (v6ops)
+			csum = v6ops->checksum_partial(skb, hook, dataoff, len,
+						       protocol);
+		break;
+	}
+
+	return csum;
+}
+EXPORT_SYMBOL_GPL(nf_checksum_partial);
+
+int nf_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
+	     bool strict, unsigned short family)
+{
+	const struct nf_ipv6_ops *v6ops;
+	int ret = 0;
+
+	switch (family) {
+	case AF_INET:
+		ret = nf_ip_route(net, dst, fl, strict);
+		break;
+	case AF_INET6:
+		v6ops = rcu_dereference(nf_ipv6_ops);
+		if (v6ops)
+			ret = v6ops->route(net, dst, fl, strict);
+		break;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(nf_route);
+
+int nf_reroute(struct sk_buff *skb, struct nf_queue_entry *entry)
+{
+	const struct nf_ipv6_ops *v6ops;
+	int ret = 0;
+
+	switch (entry->state.pf) {
+	case AF_INET:
+		ret = nf_ip_reroute(skb, entry);
+		break;
+	case AF_INET6:
+		v6ops = rcu_dereference(nf_ipv6_ops);
+		if (v6ops)
+			ret = v6ops->reroute(skb, entry);
+		break;
+	}
+	return ret;
+}