1 files changed, 120 insertions, 0 deletions
diff --git a/source4/nbt_server/wins/wins_ldb.c b/source4/nbt_server/wins/wins_ldb.c
new file mode 100644
index 0000000000..02ea306243
--- /dev/null
+++ b/source4/nbt_server/wins/wins_ldb.c
@@ -0,0 +1,120 @@
+/* 
+   ldb database module
+
+   Copyright (C) Stefan Metzmacher 2006
+
+   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/>.
+*/
+
+/*
+ *  Name: ldb
+ *
+ *  Component: ldb winsdb module
+ *
+ *  Description: verify winsdb records before they're written to disk
+ *
+ *  Author: Stefan Metzmacher
+ */
+
+#include "includes.h"
+#include "nbt_server/nbt_server.h"
+#include "nbt_server/wins/winsdb.h"
+#include "lib/ldb/include/ldb.h"
+#include "lib/ldb/include/ldb_errors.h"
+#include "lib/ldb/include/ldb_private.h"
+#include "system/network.h"
+#include "lib/socket/netif.h"
+#include "param/param.h"
+
+static int wins_ldb_verify(struct ldb_module *module, struct ldb_request *req)
+{
+	struct winsdb_handle *h = talloc_get_type(ldb_get_opaque(module->ldb, "winsdb_handle"),
+						  struct winsdb_handle);
+	const struct ldb_message *msg;
+
+	switch (req->operation) {
+	case LDB_ADD:
+		msg = req->op.add.message;
+		break;
+		
+	case LDB_MODIFY:
+		msg = req->op.mod.message;
+		break;
+
+	default:
+		return ldb_next_request(module, req);
+	}
+
+	/* do not manipulate our control entries */
+	if (ldb_dn_is_special(msg->dn)) {
+		return ldb_next_request(module, req);
+	}
+
+	if (!h) {
+		ldb_debug_set(module->ldb, LDB_DEBUG_FATAL, "%s", "WINS_LDB: INTERNAL ERROR: no winsdb_handle present!");
+		return LDB_ERR_OTHER;
+	}
+
+	switch (h->caller) {
+	case WINSDB_HANDLE_CALLER_NBTD:
+	case WINSDB_HANDLE_CALLER_WREPL:
+		/* we trust our nbt and wrepl code ... */
+		return ldb_next_request(module, req);
+
+	case WINSDB_HANDLE_CALLER_ADMIN:
+		ldb_debug(module->ldb, LDB_DEBUG_WARNING, "%s\n", "WINS_LDB: TODO verify add/modify for WINSDB_HANDLE_CALLER_ADMIN");
+		return ldb_next_request(module, req);
+	}
+
+	return LDB_ERR_OTHER;
+}
+
+static int wins_ldb_init(struct ldb_module *ctx)
+{
+	struct winsdb_handle *h;
+	const char *owner;
+	struct loadparm_context *lp_ctx = ldb_get_opaque(ctx->ldb, "loadparm");
+
+	ctx->private_data = NULL;
+
+	owner = lp_parm_string(lp_ctx, NULL, "winsdb", "local_owner");
+	if (!owner) {
+		struct interface *ifaces;
+		load_interfaces(ctx, lp_interfaces(lp_ctx), &ifaces);
+		owner = iface_n_ip(ifaces, 0);
+		if (!owner) {
+			owner = "0.0.0.0";
+		}
+	}
+
+	h = talloc(ctx, struct winsdb_handle);
+	if (!h) goto failed;
+	h->ldb		= ctx->ldb;
+	h->caller	= WINSDB_HANDLE_CALLER_ADMIN;
+	h->local_owner	= talloc_strdup(h, owner);
+	if (!h->local_owner) goto failed;
+
+	return ldb_set_opaque(ctx->ldb, "winsdb_handle", h);
+
+failed:
+	talloc_free(h);
+	return LDB_ERR_OTHER;
+}
+
+_PUBLIC_ const struct ldb_module_ops ldb_wins_ldb_module_ops = {
+	.name          = "wins_ldb",
+	.add           = wins_ldb_verify,
+	.modify        = wins_ldb_verify,
+	.init_context  = wins_ldb_init
+};