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.

1 files changed, 47 insertions, 0 deletions

diff --git a/src/providers/ldap/ldap_common.c b/src/providers/ldap/ldap_common.c
index 1e92400d9..856c57e43 100644
--- a/src/providers/ldap/ldap_common.c
+++ b/src/providers/ldap/ldap_common.c
@@ -1628,3 +1628,50 @@ sdap_attrs_get_sid_str(TALLOC_CTX *mem_ctx,
 
     return EOK;
 }
+
+struct sdap_id_conn_ctx *
+sdap_id_ctx_conn_add(struct sdap_id_ctx *id_ctx,
+                     struct sdap_service *sdap_service)
+{
+    struct sdap_id_conn_ctx *conn;
+    errno_t ret;
+
+    conn = talloc_zero(id_ctx, struct sdap_id_conn_ctx);
+    if (conn == NULL) {
+        return NULL;
+    }
+    conn->service = talloc_steal(conn, sdap_service);
+    conn->id_ctx = id_ctx;
+
+    /* Create a connection cache */
+    ret = sdap_id_conn_cache_create(conn, id_ctx, conn, &conn->conn_cache);
+    if (ret != EOK) {
+        talloc_free(conn);
+        return NULL;
+    }
+    DLIST_ADD_END(id_ctx->conn, conn, struct sdap_id_conn_ctx *);
+
+    return conn;
+}
+
+struct sdap_id_ctx *
+sdap_id_ctx_new(TALLOC_CTX *mem_ctx, struct be_ctx *bectx,
+                struct sdap_service *sdap_service)
+{
+    struct sdap_id_ctx *sdap_ctx;
+
+    sdap_ctx = talloc_zero(mem_ctx, struct sdap_id_ctx);
+    if (sdap_ctx == NULL) {
+        return NULL;
+    }
+    sdap_ctx->be = bectx;
+
+    /* There should be at least one connection context */
+    sdap_ctx->conn = sdap_id_ctx_conn_add(sdap_ctx, sdap_service);
+    if (sdap_ctx->conn == NULL) {
+        talloc_free(sdap_ctx);
+        return NULL;
+    }
+
+    return sdap_ctx;
+}