src: add support to add flowtables

This patch allows you to create flowtable:

 # nft add table x
 # nft add flowtable x m { hook ingress priority 10\; devices = { eth0, wlan0 }\; }

You have to specify hook and priority. So far, only the ingress hook is
supported. The priority represents where this flowtable is placed in the
ingress hook, which is registered to the devices that the user
specifies.

You can also use the 'create' command instead to bail out in case that
there is an existing flowtable with this name.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/netlink.h b/include/netlink.h
index 387eb9d8..41fd55f9 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -7,6 +7,7 @@
 #include <libnftnl/expr.h>
 #include <libnftnl/set.h>
 #include <libnftnl/object.h>
+#include <libnftnl/flowtable.h>
 
 #include <linux/netlink.h>
 #include <linux/netfilter/nf_tables.h>
@@ -182,6 +183,9 @@ extern int netlink_delete_obj(struct netlink_ctx *ctx, const struct handle *h,
 extern int netlink_list_flowtables(struct netlink_ctx *ctx,
 				   const struct handle *h,
 				   const struct location *loc);
+extern int netlink_add_flowtable(struct netlink_ctx *ctx,
+				 const struct handle *h, struct flowtable *ft,
+				 uint32_t flags);
 
 extern void netlink_dump_chain(const struct nftnl_chain *nlc,
 			       struct netlink_ctx *ctx);