allow overriding globally set OIDCCacheType back to shm in vhosts

Signed-off-by: Hans Zandbelt <hans.zandbelt@openidc.com>

Author: zandbelt

ChangeLog

@@ -1,5 +1,9 @@
+09/06/2024
+- allow overriding globally set OIDCCacheType back to shm in vhosts
+
 09/05/2024
 - fix OIDCCacheShmMax min/max settings; see #1260; thanks @bbartke
+- bump to 2.4.16.3dev
 
 08/30/2024
 - release 2.4.16.2

src/cfg/cache.c

@@ -344,7 +344,7 @@ static void oidc_cfg_cache_redis_merge_server_config(oidc_cfg_t *c, oidc_cfg_t *
  * generic
  */
 void oidc_cfg_cache_create_server_config(oidc_cfg_t *c) {
-	c->cache.impl = &oidc_cache_shm;
+	c->cache.impl = NULL;
 	c->cache.cfg = NULL;
 	c->cache.encrypt = OIDC_CONFIG_POS_INT_UNSET;
 	oidc_cfg_cache_shm_create_server_config(c);
@@ -358,7 +358,7 @@ void oidc_cfg_cache_create_server_config(oidc_cfg_t *c) {
 }
 
 void oidc_cfg_cache_merge_server_config(oidc_cfg_t *c, oidc_cfg_t *base, oidc_cfg_t *add) {
-	c->cache.impl = (add->cache.impl != &oidc_cache_shm) ? add->cache.impl : base->cache.impl;
+	c->cache.impl = (add->cache.impl != NULL) ? add->cache.impl : base->cache.impl;
 	c->cache.encrypt = add->cache.encrypt != OIDC_CONFIG_POS_INT_UNSET ? add->cache.encrypt : base->cache.encrypt;
 	c->cache.cfg = NULL;
 	oidc_cfg_cache_shm_merge_server_config(c, base, add);

src/cfg/cfg.c

@@ -858,6 +858,8 @@ oidc_cache_mutex_t *oidc_cfg_refresh_mutex_get(oidc_cfg_t *cfg) {
 }
 
 int oidc_cfg_post_config(oidc_cfg_t *cfg, server_rec *s) {
+	if (cfg->cache.impl == NULL)
+		cfg->cache.impl = &oidc_cache_shm;
 	if (cfg->cache.impl->post_config != NULL) {
 		if (cfg->cache.impl->post_config(s) != OK)
 			return HTTP_INTERNAL_SERVER_ERROR;