netfilter: nf_tables: Provide NFT_{RT,CT}_MAX for userspace

These macros allow conveniently declaring arrays which use NFT_{RT,CT}_*
values as indexes.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index 5a5551a580f75e4f137188bb12f1440fac5c12b4..ce031cf72288dfc5bbc50903c76d0915f9dec672 100644 (file)
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -831,7 +831,9 @@ enum nft_rt_keys {
        NFT_RT_NEXTHOP4,
        NFT_RT_NEXTHOP6,
        NFT_RT_TCPMSS,
+       __NFT_RT_MAX
 };
+#define NFT_RT_MAX             (__NFT_RT_MAX - 1)
 
 /**
  * enum nft_hash_types - nf_tables hash expression types
@@ -949,7 +951,9 @@ enum nft_ct_keys {
        NFT_CT_DST_IP,
        NFT_CT_SRC_IP6,
        NFT_CT_DST_IP6,
+       __NFT_CT_MAX
 };
+#define NFT_CT_MAX             (__NFT_CT_MAX - 1)
 
 /**
  * enum nft_ct_attributes - nf_tables ct expression netlink attributes