From 91d5f755f270a77882ef8474f1fe3e2a58bf5d2c Mon Sep 17 00:00:00 2001
From: "Bjoern A. Zeeb" <patch@zabbadoz.net>
Date: Mon, 6 Feb 2023 22:49:05 +0000
Subject: [PATCH] unbound: fix no-cache feature

Years ago I submitted the no-cache feature to unbound which over time
broke. I debugged it down to the point that pre-seeding no_cache_store
will fix this with minimal changes and make no-cache work again which
remains highly valuable in a lot of environments this got deployed.

Obtained from:	https://reviews.freebsd.org/D38057
---
 services/mesh.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/services/mesh.c b/services/mesh.c
index 9007b6e08..2e1d5c9dc 100644
--- a/services/mesh.c
+++ b/services/mesh.c
@@ -63,6 +63,7 @@
 #include "util/data/dname.h"
 #include "respip/respip.h"
 #include "services/listen_dnsport.h"
+#include "iterator/iter_utils.h"
 
 #ifdef CLIENT_SUBNET
 #include "edns-subnet/subnetmod.h"
@@ -967,6 +968,10 @@ mesh_state_create(struct module_env* env, struct query_info* qinfo,
 	mstate->s.edns_opts_back_in = NULL;
 	mstate->s.edns_opts_front_out = NULL;
 
+	/* Pre-seed no_cache_store based on stub/forward info. */
+	if (iter_stub_fwd_no_cache(&mstate->s, &mstate->s.qinfo, NULL, NULL))
+		mstate->s.no_cache_store = 1;
+
 	return mstate;
 }