Merge tag 'upstream/4.0.5+dfsg1' into samba_4.0_ivo

[abartlet/samba-debian.git] / source3 / lib / id_cache.c

diff --git a/source3/lib/id_cache.c b/source3/lib/id_cache.c
new file mode 100644 (file)
index 0000000..e6e3457
--- /dev/null
+++ b/source3/lib/id_cache.c
@@ -0,0 +1,115 @@
+/*
+ * Samba Unix/Linux SMB client library
+ *
+ * Copyright (C) Gregor Beck 2011
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @brief  Notify smbd about idmap changes
+ * @file   msg_idmap.c
+ * @author Gregor Beck <gb@sernet.de>
+ * @date   Feb 2011
+ *
+ */
+
+#include "includes.h"
+#include "messages.h"
+#include "lib/id_cache.h"
+#include "include/memcache.h"
+#include "idmap_cache.h"
+#include "../librpc/gen_ndr/ndr_security.h"
+#include "../libcli/security/dom_sid.h"
+
+bool id_cache_ref_parse(const char* str, struct id_cache_ref* id)
+{
+       struct dom_sid sid;
+       unsigned long ul;
+       char c, trash;
+
+       if (sscanf(str, "%cID %lu%c", &c, &ul, &trash) == 2) {
+               switch(c) {
+               case 'G':
+                       id->id.gid = ul;
+                       id->type = GID;
+                       return true;
+               case 'U':
+                       id->id.uid = ul;
+                       id->type = UID;
+                       return true;
+               default:
+                       break;
+               }
+       } else if (string_to_sid(&sid, str)) {
+               id->id.sid = sid;
+               id->type = SID;
+               return true;
+       } else if (strncmp(str, "USER ", 5) == 0) {
+               id->id.name = str + 5;
+               id->type = USERNAME;
+               return true;
+       }
+       return false;
+}
+
+static bool delete_getpwnam_cache(const char *username)
+{
+       DATA_BLOB name = data_blob_string_const_null(username);
+       DEBUG(6, ("Delete passwd struct for %s from memcache\n",
+                 username));
+       memcache_delete(NULL, GETPWNAM_CACHE, name);
+       return true;
+}
+
+void id_cache_delete_from_cache(const struct id_cache_ref* id)
+{
+       switch(id->type) {
+       case UID:
+               idmap_cache_del_uid(id->id.uid);
+               break;
+       case GID:
+               idmap_cache_del_gid(id->id.gid);
+               break;
+       case SID:
+               idmap_cache_del_sid(&id->id.sid);
+               break;
+       case USERNAME:
+               delete_getpwnam_cache(id->id.name);
+       default:
+               break;
+       }
+}
+
+void id_cache_delete_message(struct messaging_context *msg_ctx,
+                            void *private_data,
+                            uint32_t msg_type,
+                            struct server_id server_id,
+                            DATA_BLOB* data)
+{
+       const char *msg = (data && data->data) ? (const char *)data->data : "<NULL>";
+       struct id_cache_ref id;
+
+       if (!id_cache_ref_parse(msg, &id)) {
+               DEBUG(0, ("Invalid ?ID: %s\n", msg));
+               return;
+       }
+
+       id_cache_delete_from_cache(&id);
+}
+
+void id_cache_register_msgs(struct messaging_context *ctx)
+{
+       messaging_register(ctx, NULL, ID_CACHE_DELETE, id_cache_delete_message);
+}