DNS sites support - use SRV DNS lookup plugin in all providers

https://fedorahosted.org/sssd/ticket/1032

We set a plugin during an initialization of ID provider, which
is an authoritative provider for a plugin choice. The plugin is
set only once. When other provider is initalized (e.g. id = IPA,
sudo = LDAP), we do not overwrite the plugin.

Since sssm_*_id_init() is called from all module constructors,
this patch relies on the fact, that ID provider is initialized
before all other providers.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/providers/ad/ad_init.c b/src/providers/ad/ad_init.c
index 2add74a20..087ec3c45 100644
--- a/src/providers/ad/ad_init.c
+++ b/src/providers/ad/ad_init.c
@@ -107,6 +107,7 @@ sssm_ad_id_init(struct be_ctx *bectx,
     errno_t ret;
     struct ad_id_ctx *ad_ctx;
     struct sdap_id_ctx *sdap_ctx;
+    const char *hostname;
 
     if (!ad_options) {
         ret = common_ad_init(bectx);
@@ -175,6 +176,15 @@ sssm_ad_id_init(struct be_ctx *bectx,
         goto done;
     }
 
+    /* setup SRV lookup plugin */
+    hostname = dp_opt_get_string(ad_options->basic, AD_HOSTNAME);
+    ret = be_fo_set_dns_srv_lookup_plugin(bectx, hostname);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to set SRV lookup plugin "
+                                    "[%d]: %s\n", ret, strerror(ret)));
+        goto done;
+    }
+
     *ops = &ad_id_ops;
     *pvt_data = ad_ctx;