src: add netdev family support

This patch adds support for the new 'netdev' table. So far, this table allows
you to create filter chains from ingress.

The following example shows a very simple base configuration with one table that
contains a basechain that is attached to the 'eth0':

 # nft list table netdev filter
 table netdev filter {
        chain eth0-ingress {
                type filter hook ingress device eth0 priority 0; policy accept;
        }
 }

You can test that this works by adding a simple rule with counters:

 # nft add rule netdev filter eth0-ingress counter

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

1 files changed, 2 insertions, 0 deletions

diff --git a/include/rule.h b/include/rule.h
index 5d445993..604de14d 100644
--- a/include/rule.h
+++ b/include/rule.h
@@ -113,6 +113,7 @@ enum chain_flags {
  * @priority:	hook priority (base chains)
  * @policy:	default chain policy (base chains)
  * @type:	chain type
+ * @dev:	device (if any)
  * @rules:	rules contained in the chain
  */
 struct chain {
@@ -125,6 +126,7 @@ struct chain {
 	int			priority;
 	int			policy;
 	const char		*type;
+	const char		*dev;
 	struct scope		scope;
 	struct list_head	rules;
 };