src: ct: store proto base of ct key, if any

ct keys can match on network and tranasport header protocol
elements, such as port numbers or ip addresses.

Store this base type so a followup commit can store and kill
dependencies, e.g. if bsae is network header we might be able
to kill an earlier expression because the dependency is implicit.

Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/ct.c b/src/ct.c
index f99fc7f8..044a6a50 100644
--- a/src/ct.c
+++ b/src/ct.c
@@ -347,8 +347,21 @@ struct expr *ct_expr_alloc(const struct location *loc, enum nft_ct_keys key,
 	expr->ct.nfproto = nfproto;
 
 	switch (key) {
+	case NFT_CT_SRC:
+	case NFT_CT_DST:
+		expr->ct.base = PROTO_BASE_NETWORK_HDR;
+		break;
+	case NFT_CT_PROTO_SRC:
+	case NFT_CT_PROTO_DST:
+		expr->ct.base = PROTO_BASE_TRANSPORT_HDR;
+		break;
 	case NFT_CT_PROTOCOL:
 		expr->flags = EXPR_F_PROTOCOL;
+		expr->ct.base = PROTO_BASE_NETWORK_HDR;
+		break;
+	case NFT_CT_L3PROTOCOL:
+		expr->flags = EXPR_F_PROTOCOL;
+		expr->ct.base = PROTO_BASE_LL_HDR;
 		break;
 	default:
 		break;