source4/cldap_server/cldap_server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    CLDAP server task
   5
   6    Copyright (C) Andrew Tridgell        2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include <talloc.h>
  24 #include "lib/messaging/irpc.h"
  25 #include "smbd/service_task.h"
  26 #include "smbd/service.h"
  27 #include "cldap_server/cldap_server.h"
  28 #include "system/network.h"
  29 #include "lib/socket/netif.h"
  30 #include <ldb.h>
  31 #include <ldb_errors.h>
  32 #include "dsdb/samdb/samdb.h"
  33 #include "ldb_wrap.h"
  34 #include "auth/auth.h"
  35 #include "param/param.h"
  36 #include "../lib/tsocket/tsocket.h"
  37
  38 NTSTATUS server_service_cldapd_init(void);
  39
  40 /*
  41   handle incoming cldap requests
  42 */
  43 static void cldapd_request_handler(struct cldap_socket *cldap,
  44                                    void *private_data,
  45                                    struct cldap_incoming *in)
  46 {
  47         struct cldapd_server *cldapd = talloc_get_type(private_data,
  48                                        struct cldapd_server);
  49         struct ldap_SearchRequest *search;
  50
  51         if (in->ldap_msg->type != LDAP_TAG_SearchRequest) {
  52                 DEBUG(0,("Invalid CLDAP request type %d from %s\n",
  53                          in->ldap_msg->type,
  54                          tsocket_address_string(in->src, in)));
  55                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
  56                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP request");
  57                 talloc_free(in);
  58                 return;
  59         }
  60
  61         search = &in->ldap_msg->r.SearchRequest;
  62
  63         if (strcmp("", search->basedn) != 0) {
  64                 DEBUG(0,("Invalid CLDAP basedn '%s' from %s\n",
  65                          search->basedn,
  66                          tsocket_address_string(in->src, in)));
  67                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
  68                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP basedn");
  69                 talloc_free(in);
  70                 return;
  71         }
  72
  73         if (search->scope != LDAP_SEARCH_SCOPE_BASE) {
  74                 DEBUG(0,("Invalid CLDAP scope %d from %s\n",
  75                          search->scope,
  76                          tsocket_address_string(in->src, in)));
  77                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
  78                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP scope");
  79                 talloc_free(in);
  80                 return;
  81         }
  82
  83         if (search->num_attributes == 1 &&
  84             strcasecmp(search->attributes[0], "netlogon") == 0) {
  85                 cldapd_netlogon_request(cldap,
  86                                         cldapd,
  87                                         in,
  88                                         in->ldap_msg->messageid,
  89                                         search->tree,
  90                                         in->src);
  91                 talloc_free(in);
  92                 return;
  93         }
  94
  95         cldapd_rootdse_request(cldap, cldapd, in,
  96                                in->ldap_msg->messageid,
  97                                search, in->src);
  98         talloc_free(in);
  99 }
 100
 101
 102 /*
 103   start listening on the given address
 104 */
 105 static NTSTATUS cldapd_add_socket(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
 106                                   const char *address)
 107 {
 108         struct cldap_socket *cldapsock;
 109         struct tsocket_address *socket_address;
 110         NTSTATUS status;
 111         int ret;
 112
 113         ret = tsocket_address_inet_from_strings(cldapd,
 114                                                 "ip",
 115                                                 address,
 116                                                 lpcfg_cldap_port(lp_ctx),
 117                                                 &socket_address);
 118         if (ret != 0) {
 119                 status = map_nt_error_from_unix_common(errno);
 120                 DEBUG(0,("invalid address %s:%d - %s:%s\n",
 121                          address, lpcfg_cldap_port(lp_ctx),
 122                          gai_strerror(ret), nt_errstr(status)));
 123                 return status;
 124         }
 125
 126         /* listen for unicasts on the CLDAP port (389) */
 127         status = cldap_socket_init(cldapd,
 128                                    socket_address,
 129                                    NULL,
 130                                    &cldapsock);
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 DEBUG(0,("Failed to bind to %s - %s\n",
 133                          tsocket_address_string(socket_address, socket_address),
 134                          nt_errstr(status)));
 135                 talloc_free(socket_address);
 136                 return status;
 137         }
 138         talloc_free(socket_address);
 139
 140         cldap_set_incoming_handler(cldapsock, cldapd->task->event_ctx,
 141                                    cldapd_request_handler, cldapd);
 142
 143         return NT_STATUS_OK;
 144 }
 145
 146 /*
 147   setup our listening sockets on the configured network interfaces
 148 */
 149 static NTSTATUS cldapd_startup_interfaces(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
 150                                           struct interface *ifaces)
 151 {
 152         int i, num_interfaces;
 153         TALLOC_CTX *tmp_ctx = talloc_new(cldapd);
 154         NTSTATUS status;
 155
 156         num_interfaces = iface_list_count(ifaces);
 157
 158         /* if we are allowing incoming packets from any address, then
 159            we need to bind to the wildcard address */
 160         if (!lpcfg_bind_interfaces_only(lp_ctx)) {
 161                 int num_binds = 0;
 162                 char **wcard = iface_list_wildcard(cldapd);
 163                 NT_STATUS_HAVE_NO_MEMORY(wcard);
 164                 for (i=0; wcard[i]; i++) {
 165                         status = cldapd_add_socket(cldapd, lp_ctx, wcard[i]);
 166                         if (NT_STATUS_IS_OK(status)) {
 167                                 num_binds++;
 168                         }
 169                 }
 170                 talloc_free(wcard);
 171                 if (num_binds == 0) {
 172                         return NT_STATUS_INVALID_PARAMETER_MIX;
 173                 }
 174         }
 175
 176         /* now we have to also listen on the specific interfaces,
 177            so that replies always come from the right IP */
 178         for (i=0; i<num_interfaces; i++) {
 179                 const char *address = talloc_strdup(tmp_ctx, iface_list_n_ip(ifaces, i));
 180                 status = cldapd_add_socket(cldapd, lp_ctx, address);
 181                 NT_STATUS_NOT_OK_RETURN(status);
 182         }
 183
 184         talloc_free(tmp_ctx);
 185
 186         return NT_STATUS_OK;
 187 }
 188
 189 /*
 190   startup the cldapd task
 191 */
 192 static void cldapd_task_init(struct task_server *task)
 193 {
 194         struct cldapd_server *cldapd;
 195         NTSTATUS status;
 196         struct interface *ifaces;
 197
 198         load_interface_list(task, task->lp_ctx, &ifaces);
 199
 200         if (iface_list_count(ifaces) == 0) {
 201                 task_server_terminate(task, "cldapd: no network interfaces configured", false);
 202                 return;
 203         }
 204
 205         switch (lpcfg_server_role(task->lp_ctx)) {
 206         case ROLE_STANDALONE:
 207                 task_server_terminate(task, "cldap_server: no CLDAP server required in standalone configuration",
 208                                       false);
 209                 return;
 210         case ROLE_DOMAIN_MEMBER:
 211                 task_server_terminate(task, "cldap_server: no CLDAP server required in member server configuration",
 212                                       false);
 213                 return;
 214         case ROLE_ACTIVE_DIRECTORY_DC:
 215                 /* Yes, we want an CLDAP server */
 216                 break;
 217         }
 218
 219         task_server_set_title(task, "task[cldapd]");
 220
 221         cldapd = talloc(task, struct cldapd_server);
 222         if (cldapd == NULL) {
 223                 task_server_terminate(task, "cldapd: out of memory", true);
 224                 return;
 225         }
 226
 227         cldapd->task = task;
 228         cldapd->samctx = samdb_connect(cldapd, task->event_ctx, task->lp_ctx, system_session(task->lp_ctx), 0);
 229         if (cldapd->samctx == NULL) {
 230                 task_server_terminate(task, "cldapd failed to open samdb", true);
 231                 return;
 232         }
 233
 234         /* start listening on the configured network interfaces */
 235         status = cldapd_startup_interfaces(cldapd, task->lp_ctx, ifaces);
 236         if (!NT_STATUS_IS_OK(status)) {
 237                 task_server_terminate(task, "cldapd failed to setup interfaces", true);
 238                 return;
 239         }
 240
 241         irpc_add_name(task->msg_ctx, "cldap_server");
 242 }
 243
 244
 245 /*
 246   register ourselves as a available server
 247 */
 248 NTSTATUS server_service_cldapd_init(void)
 249 {
 250         return register_server_service("cldap", cldapd_task_init);
 251 }