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 static int wins_ldb_verify(struct ldb_module *module, struct ldb_request *req) 40 { 41 struct ldb_context *ldb = ldb_module_get_ctx(module); 42 struct winsdb_handle *h = talloc_get_type(ldb_get_opaque(ldb, "winsdb_handle"), 43 struct winsdb_handle); 44 const struct ldb_message *msg; 45 46 switch (req->operation) { 47 case LDB_ADD: 48 msg = req->op.add.message; 49 break; 50 51 case LDB_MODIFY: 52 msg = req->op.mod.message; 53 break; 54 55 default: 56 return ldb_next_request(module, req); 57 } 58 59 /* do not manipulate our control entries */ 60 if (ldb_dn_is_special(msg->dn)) { 61 return ldb_next_request(module, req); 62 } 63 64 if (!h) { 65 ldb_debug_set(ldb, LDB_DEBUG_FATAL, "%s", "WINS_LDB: INTERNAL ERROR: no winsdb_handle present!"); 66 return LDB_ERR_OTHER; 67 } 68 69 switch (h->caller) { 70 case WINSDB_HANDLE_CALLER_NBTD: 71 case WINSDB_HANDLE_CALLER_WREPL: 72 /* we trust our nbt and wrepl code ... */ 73 return ldb_next_request(module, req); 74 75 case WINSDB_HANDLE_CALLER_ADMIN: 76 ldb_debug(ldb, LDB_DEBUG_WARNING, "%s\n", "WINS_LDB: TODO verify add/modify for WINSDB_HANDLE_CALLER_ADMIN"); 77 return ldb_next_request(module, req); 78 } 79 80 return LDB_ERR_OTHER; 81 } 82 83 static int wins_ldb_init(struct ldb_module *module) 84 { 85 struct ldb_context *ldb = ldb_module_get_ctx(module); 86 struct winsdb_handle *h; 87 const char *owner; 88 struct loadparm_context *lp_ctx = ldb_get_opaque(ldb, "loadparm"); 89 90 ldb_module_set_private(module, NULL); 91 92 owner = lpcfg_parm_string(lp_ctx, NULL, "winsdb", "local_owner"); 93 if (!owner) { 94 struct interface *ifaces; 95 load_interface_list(module, lp_ctx, &ifaces); 96 owner = iface_list_first_v4(ifaces); 97 if (!owner) { 98 owner = "0.0.0.0"; 99 } 100 } 101 102 h = talloc_zero(module, struct winsdb_handle); 103 if (!h) goto failed; 104 h->ldb = ldb; 105 h->caller = WINSDB_HANDLE_CALLER_ADMIN; 106 h->local_owner = talloc_strdup(h, owner); 107 if (!h->local_owner) goto failed; 108 109 return ldb_set_opaque(ldb, "winsdb_handle", h); 110 111 failed: 112 talloc_free(h); 113 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 int ldb_wins_ldb_module_init(const char *version) 124 { 125 LDB_MODULE_CHECK_VERSION(version); 126 return ldb_register_module(&ldb_wins_ldb_module_ops); 127 } 128