Line data    Source code

       1             : /* 
       2             :    ldb database module
       3             : 
       4             :    Copyright (C) Stefan Metzmacher 2006
       5             : 
       6             :    This program is free software; you can redistribute it and/or modify
       7             :    it under the terms of the GNU General Public License as published by
       8             :    the Free Software Foundation; either version 3 of the License, or
       9             :    (at your option) any later version.
      10             :    
      11             :    This program is distributed in the hope that it will be useful,
      12             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             :    GNU General Public License for more details.
      15             :    
      16             :    You should have received a copy of the GNU General Public License
      17             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      18             : */
      19             : 
      20             : /*
      21             :  *  Name: ldb
      22             :  *
      23             :  *  Component: ldb winsdb module
      24             :  *
      25             :  *  Description: verify winsdb records before they're written to disk
      26             :  *
      27             :  *  Author: Stefan Metzmacher
      28             :  */
      29             : 
      30             : #include "includes.h"
      31             : #include "lib/events/events.h"
      32             : #include "nbt_server/nbt_server.h"
      33             : #include "nbt_server/wins/winsdb.h"
      34             : #include <ldb_module.h>
      35             : #include "system/network.h"
      36             : #include "lib/socket/netif.h"
      37             : #include "param/param.h"
      38             : 
      39        1312 : static int wins_ldb_verify(struct ldb_module *module, struct ldb_request *req)
      40             : {
      41        1312 :         struct ldb_context *ldb = ldb_module_get_ctx(module);
      42        1312 :         struct winsdb_handle *h = talloc_get_type(ldb_get_opaque(ldb, "winsdb_handle"),
      43             :                                                   struct winsdb_handle);
      44           0 :         const struct ldb_message *msg;
      45             : 
      46        1312 :         switch (req->operation) {
      47         208 :         case LDB_ADD:
      48         208 :                 msg = req->op.add.message;
      49         208 :                 break;
      50             :                 
      51        1104 :         case LDB_MODIFY:
      52        1104 :                 msg = req->op.mod.message;
      53        1104 :                 break;
      54             : 
      55           0 :         default:
      56           0 :                 return ldb_next_request(module, req);
      57             :         }
      58             : 
      59             :         /* do not manipulate our control entries */
      60        1312 :         if (ldb_dn_is_special(msg->dn)) {
      61           0 :                 return ldb_next_request(module, req);
      62             :         }
      63             : 
      64        1312 :         if (!h) {
      65           0 :                 ldb_debug_set(ldb, LDB_DEBUG_FATAL, "%s", "WINS_LDB: INTERNAL ERROR: no winsdb_handle present!");
      66           0 :                 return LDB_ERR_OTHER;
      67             :         }
      68             : 
      69        1312 :         switch (h->caller) {
      70        1312 :         case WINSDB_HANDLE_CALLER_NBTD:
      71             :         case WINSDB_HANDLE_CALLER_WREPL:
      72             :                 /* we trust our nbt and wrepl code ... */
      73        1312 :                 return ldb_next_request(module, req);
      74             : 
      75           0 :         case WINSDB_HANDLE_CALLER_ADMIN:
      76           0 :                 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s\n", "WINS_LDB: TODO verify add/modify for WINSDB_HANDLE_CALLER_ADMIN");
      77           0 :                 return ldb_next_request(module, req);
      78             :         }
      79             : 
      80           0 :         return LDB_ERR_OTHER;
      81             : }
      82             : 
      83         139 : static int wins_ldb_init(struct ldb_module *module)
      84             : {
      85         139 :         struct ldb_context *ldb = ldb_module_get_ctx(module);
      86           4 :         struct winsdb_handle *h;
      87           4 :         const char *owner;
      88         139 :         struct loadparm_context *lp_ctx = ldb_get_opaque(ldb, "loadparm");
      89             : 
      90         139 :         ldb_module_set_private(module, NULL);
      91             : 
      92         139 :         owner = lpcfg_parm_string(lp_ctx, NULL, "winsdb", "local_owner");
      93         139 :         if (!owner) {
      94           4 :                 struct interface *ifaces;
      95         139 :                 load_interface_list(module, lp_ctx, &ifaces);
      96         139 :                 owner = iface_list_first_v4(ifaces);
      97         139 :                 if (!owner) {
      98           0 :                         owner = "0.0.0.0";
      99             :                 }
     100             :         }
     101             : 
     102         139 :         h = talloc_zero(module, struct winsdb_handle);
     103         139 :         if (!h) goto failed;
     104         139 :         h->ldb               = ldb;
     105         139 :         h->caller    = WINSDB_HANDLE_CALLER_ADMIN;
     106         139 :         h->local_owner       = talloc_strdup(h, owner);
     107         139 :         if (!h->local_owner) goto failed;
     108             : 
     109         139 :         return ldb_set_opaque(ldb, "winsdb_handle", h);
     110             : 
     111           0 : failed:
     112           0 :         talloc_free(h);
     113           0 :         return LDB_ERR_OTHER;
     114             : }
     115             : 
     116             : static const struct ldb_module_ops ldb_wins_ldb_module_ops = {
     117             :         .name          = "wins_ldb",
     118             :         .add           = wins_ldb_verify,
     119             :         .modify        = wins_ldb_verify,
     120             :         .init_context  = wins_ldb_init
     121             : };
     122             : 
     123        6040 : int ldb_wins_ldb_module_init(const char *version)
     124             : {
     125        6040 :         LDB_MODULE_CHECK_VERSION(version);
     126        6040 :         return ldb_register_module(&ldb_wins_ldb_module_ops);
     127             : }