LDAP: sdap_id_ctx might contain several connections

With some LDAP server implementations, one server might provide
different "views" of the identites on different ports. One example is
the Active Directory Global catalog. The provider would contact
different view depending on which operation it is performing and against
which SSSD domain.

At the same time, these views run on the same server, which means the same
server options, enumeration, cleanup or Kerberos service should be used.
So instead of using several different failover ports or several
instances of sdap_id_ctx, this patch introduces a new "struct
sdap_id_conn_ctx" that contains the connection cache to the particular
view and an instance of "struct sdap_options" that contains the URI.

No functional changes are present in this patch, currently all providers
use a single connection. Multiple connections will be used later in the
upcoming patches.

2 files changed, 22 insertions, 27 deletions

diff --git a/src/providers/ad/ad_init.c b/src/providers/ad/ad_init.c
index d5488ad0..aada14ec 100644
--- a/src/providers/ad/ad_init.c
+++ b/src/providers/ad/ad_init.c
@@ -135,29 +135,36 @@ sssm_ad_id_init(struct be_ctx *bectx,
     ad_ctx->ad_options = ad_options;
     ad_options->id_ctx = ad_ctx;
 
-    sdap_ctx = talloc_zero(ad_options, struct sdap_id_ctx);
-    if (!sdap_ctx) {
+    sdap_ctx = sdap_id_ctx_new(ad_options, bectx, ad_options->service->sdap);
+    if (sdap_ctx == NULL) {
         return ENOMEM;
     }
-    sdap_ctx->be = bectx;
-    sdap_ctx->service = ad_options->service->sdap;
     ad_ctx->sdap_id_ctx = sdap_ctx;
 
-    ret = ad_get_id_options(ad_options, bectx->cdb,
-                            bectx->conf_path,
-                            &sdap_ctx->opts);
+    ret = ad_dyndns_init(sdap_ctx->be, ad_options);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_MINOR_FAILURE,
+             ("Failure setting up automatic DNS update\n"));
+        /* Continue without DNS updates */
+    }
+
+    ret = sdap_id_setup_tasks(sdap_ctx);
     if (ret != EOK) {
         goto done;
     }
 
-    ret = setup_tls_config(sdap_ctx->opts->basic);
+    ret = sdap_setup_child();
     if (ret != EOK) {
-        DEBUG(SSSDBG_CRIT_FAILURE,
-              ("setup_tls_config failed [%s]\n", strerror(ret)));
+        DEBUG(SSSDBG_FATAL_FAILURE,
+              ("setup_child failed [%d][%s].\n",
+               ret, strerror(ret)));
         goto done;
     }
 
-    ret = sdap_id_conn_cache_create(sdap_ctx, sdap_ctx, &sdap_ctx->conn_cache);
+    /* Set up various SDAP options */
+    ret = ad_get_id_options(ad_options, bectx->cdb,
+                            bectx->conf_path,
+                            &sdap_ctx->opts);
     if (ret != EOK) {
         goto done;
     }
@@ -166,23 +173,11 @@ sssm_ad_id_init(struct be_ctx *bectx,
     ret = sdap_idmap_init(sdap_ctx, sdap_ctx, &sdap_ctx->opts->idmap_ctx);
     if (ret != EOK) goto done;
 
-    ret = ad_dyndns_init(sdap_ctx->be, ad_options);
-    if (ret != EOK) {
-        DEBUG(SSSDBG_MINOR_FAILURE,
-             ("Failure setting up automatic DNS update\n"));
-        /* Continue without DNS updates */
-    }
 
-    ret = sdap_id_setup_tasks(sdap_ctx);
-    if (ret != EOK) {
-        goto done;
-    }
-
-    ret = sdap_setup_child();
+    ret = setup_tls_config(sdap_ctx->opts->basic);
     if (ret != EOK) {
-        DEBUG(SSSDBG_FATAL_FAILURE,
-              ("setup_child failed [%d][%s].\n",
-               ret, strerror(ret)));
+        DEBUG(SSSDBG_CRIT_FAILURE,
+              ("setup_tls_config failed [%s]\n", strerror(ret)));
         goto done;
     }
 
diff --git a/src/providers/ad/ad_subdomains.c b/src/providers/ad/ad_subdomains.c
index 51c69554..da0c85e7 100644
--- a/src/providers/ad/ad_subdomains.c
+++ b/src/providers/ad/ad_subdomains.c
@@ -93,7 +93,7 @@ static void ad_subdomains_retrieve(struct ad_subdomains_ctx *ctx,
     req_ctx->reply = NULL;
 
     req_ctx->sdap_op = sdap_id_op_create(req_ctx,
-                                         ctx->sdap_id_ctx->conn_cache);
+                                         ctx->sdap_id_ctx->conn->conn_cache);
     if (req_ctx->sdap_op == NULL) {
         DEBUG(SSSDBG_OP_FAILURE, ("sdap_id_op_create failed.\n"));
         ret = ENOMEM;