src: Support netdev egress hook

Add userspace support for the netdev egress hook which is queued up for
v5.16-rc1, complete with documentation and tests.  Usage is identical to
the ingress hook.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/rule.c b/src/rule.c
index 7c048fcc..c7bc6bcf 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -675,6 +675,7 @@ static const char * const chain_hookname_str_array[] = {
 	"postrouting",
 	"output",
 	"ingress",
+	"egress",
 	NULL,
 };
 
@@ -832,6 +833,8 @@ const char *hooknum2str(unsigned int family, unsigned int hooknum)
 		switch (hooknum) {
 		case NF_NETDEV_INGRESS:
 			return "ingress";
+		case NF_NETDEV_EGRESS:
+			return "egress";
 		}
 		break;
 	default: