exthdr: generate dependencies for inet/bridge/netdev family

Should treat this as if user would have asked to match ipv6 header field.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/payload.c b/src/payload.c
index 8f67b6ec..7e380617 100644
--- a/src/payload.c
+++ b/src/payload.c
@@ -302,6 +302,21 @@ int payload_gen_dependency(struct eval_ctx *ctx, const struct expr *expr,
 	return payload_add_dependency(ctx, desc, expr->payload.desc, expr, res);
 }
 
+int exthdr_gen_dependency(struct eval_ctx *ctx, const struct expr *expr,
+			  struct stmt **res)
+{
+	const struct proto_desc *desc;
+
+	desc = ctx->pctx.protocol[PROTO_BASE_LL_HDR].desc;
+	if (desc == NULL)
+		return expr_error(ctx->msgs, expr,
+				  "Cannot generate dependency: "
+				  "no %s protocol specified",
+				  proto_base_names[PROTO_BASE_LL_HDR]);
+
+	return payload_add_dependency(ctx, desc, &proto_ip6, expr, res);
+}
+
 /**
  * payload_expr_complete - fill in type information of a raw payload expr
  *