src: support for flowtable listing

This patch allows you to dump existing flowtable.

 # nft list ruleset
 table ip x {
        flowtable x {
                hook ingress priority 10
                devices = { eth0, tap0 }
        }
 }

You can also list existing flowtables via:

 # nft list flowtables
 table ip x {
        flowtable x {
                hook ingress priority 10
                devices = { eth0, tap0 }
        }
 }

 You need a Linux kernel >= 4.16-rc to test this new feature.

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 2c4250e7..387eb9d8 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -179,6 +179,10 @@ extern int netlink_add_obj(struct netlink_ctx *ctx, const struct handle *h,
 extern int netlink_delete_obj(struct netlink_ctx *ctx, const struct handle *h,
 			      struct location *loc, uint32_t type);
 
+extern int netlink_list_flowtables(struct netlink_ctx *ctx,
+				   const struct handle *h,
+				   const struct location *loc);
+
 extern void netlink_dump_chain(const struct nftnl_chain *nlc,
 			       struct netlink_ctx *ctx);
 extern void netlink_dump_rule(const struct nftnl_rule *nlr,