[PATCH libnftnl] expr: meta: add slave device matching

[Florian Westphal <fw@strlen.de>]

Cc: Martin Willi <martin@strongswan.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
---
 include/linux/netfilter/nf_tables.h | 4 ++++
 src/expr/meta.c                     | 4 +++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/netfilter/nf_tables.h b/include/linux/netfilter/nf_tables.h
index bb9b049310df..e237ecbdcd8a 100644
--- a/include/linux/netfilter/nf_tables.h
+++ b/include/linux/netfilter/nf_tables.h
@@ -805,6 +805,8 @@ enum nft_exthdr_attributes {
  * @NFT_META_TIME_NS: time since epoch (in nanoseconds)
  * @NFT_META_TIME_DAY: day of week (from 0 = Sunday to 6 = Saturday)
  * @NFT_META_TIME_HOUR: hour of day (in seconds)
+ * @NFT_META_SDIF: slave device interface index
+ * @NFT_META_SDIFNAME: slave device interface name
  */
 enum nft_meta_keys {
 	NFT_META_LEN,
@@ -840,6 +842,8 @@ enum nft_meta_keys {
 	NFT_META_TIME_NS,
 	NFT_META_TIME_DAY,
 	NFT_META_TIME_HOUR,
+	NFT_META_SDIF,
+	NFT_META_SDIFNAME,
 };
 
 /**
diff --git a/src/expr/meta.c b/src/expr/meta.c
index 979019831f2b..6ed8ee5645c4 100644
--- a/src/expr/meta.c
+++ b/src/expr/meta.c
@@ -22,7 +22,7 @@
 #include <libnftnl/rule.h>
 
 #ifndef NFT_META_MAX
-#define NFT_META_MAX (NFT_META_TIME_HOUR + 1)
+#define NFT_META_MAX (NFT_META_SDIFNAME + 1)
 #endif
 
 struct nftnl_expr_meta {
@@ -166,6 +166,8 @@ static const char *meta_key2str_array[NFT_META_MAX] = {
 	[NFT_META_TIME_NS]	= "time",
 	[NFT_META_TIME_DAY]	= "day",
 	[NFT_META_TIME_HOUR]	= "hour",
+	[NFT_META_SDIF]		= "sdif",
+	[NFT_META_SDIFNAME]	= "sdifname",
 };
 
 static const char *meta_key2str(uint8_t key)
-- 
2.24.1