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_AbandonRequest) {
  52                 DEBUG(10,("Got (and ignoring) CLDAP AbandonRequest from %s.",
  53                           tsocket_address_string(in->src, in)));
  54                 talloc_free(in);
  55                 return;
  56         }
  57
  58         if (in->ldap_msg->type != LDAP_TAG_SearchRequest) {
  59                 DEBUG(0,("Invalid CLDAP request type %d from %s\n",
  60                          in->ldap_msg->type,
  61                          tsocket_address_string(in->src, in)));
  62                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
  63                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP request");
  64                 talloc_free(in);
  65                 return;
  66         }
  67
  68         search = &in->ldap_msg->r.SearchRequest;
  69
  70         if (strcmp("", search->basedn) != 0) {
  71                 DEBUG(0,("Invalid CLDAP basedn '%s' from %s\n",
  72                          search->basedn,
  73                          tsocket_address_string(in->src, in)));
  74                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
  75                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP basedn");
  76                 talloc_free(in);
  77                 return;
  78         }
  79
  80         if (search->scope != LDAP_SEARCH_SCOPE_BASE) {
  81                 DEBUG(0,("Invalid CLDAP scope %d from %s\n",
  82                          search->scope,
  83                          tsocket_address_string(in->src, in)));
  84                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
  85                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP scope");
  86                 talloc_free(in);
  87                 return;
  88         }
  89
  90         cldapd_rootdse_request(cldap, cldapd, in,
  91                                in->ldap_msg->messageid,
  92                                search, in->src);
  93         talloc_free(in);
  94 }
  95
  96
  97 /*
  98   start listening on the given address
  99 */
 100 static NTSTATUS cldapd_add_socket(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
 101                                   const char *address)
 102 {
 103         struct cldap_socket *cldapsock;
 104         struct tsocket_address *socket_address;
 105         NTSTATUS status;
 106         int ret;
 107
 108         ret = tsocket_address_inet_from_strings(cldapd,
 109                                                 "ip",
 110                                                 address,
 111                                                 lpcfg_cldap_port(lp_ctx),
 112                                                 &socket_address);
 113         if (ret != 0) {
 114                 status = map_nt_error_from_unix_common(errno);
 115                 DEBUG(0,("invalid address %s:%d - %s:%s\n",
 116                          address, lpcfg_cldap_port(lp_ctx),
 117                          gai_strerror(ret), nt_errstr(status)));
 118                 return status;
 119         }
 120
 121         /* listen for unicasts on the CLDAP port (389) */
 122         status = cldap_socket_init(cldapd,
 123                                    socket_address,
 124                                    NULL,
 125                                    &cldapsock);
 126         if (!NT_STATUS_IS_OK(status)) {
 127                 DEBUG(0,("Failed to bind to %s - %s\n",
 128                          tsocket_address_string(socket_address, socket_address),
 129                          nt_errstr(status)));
 130                 talloc_free(socket_address);
 131                 return status;
 132         }
 133         talloc_free(socket_address);
 134
 135         cldap_set_incoming_handler(cldapsock, cldapd->task->event_ctx,
 136                                    cldapd_request_handler, cldapd);
 137
 138         return NT_STATUS_OK;
 139 }
 140
 141 /*
 142   setup our listening sockets on the configured network interfaces
 143 */
 144 static NTSTATUS cldapd_startup_interfaces(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
 145                                           struct interface *ifaces)
 146 {
 147         int i, num_interfaces;
 148         TALLOC_CTX *tmp_ctx = talloc_new(cldapd);
 149         NTSTATUS status;
 150
 151         num_interfaces = iface_list_count(ifaces);
 152
 153         /* if we are allowing incoming packets from any address, then
 154            we need to bind to the wildcard address */
 155         if (!lpcfg_bind_interfaces_only(lp_ctx)) {
 156                 int num_binds = 0;
 157                 char **wcard = iface_list_wildcard(cldapd);
 158                 NT_STATUS_HAVE_NO_MEMORY(wcard);
 159                 for (i=0; wcard[i]; i++) {
 160                         status = cldapd_add_socket(cldapd, lp_ctx, wcard[i]);
 161                         if (NT_STATUS_IS_OK(status)) {
 162                                 num_binds++;
 163                         }
 164                 }
 165                 talloc_free(wcard);
 166                 if (num_binds == 0) {
 167                         return NT_STATUS_INVALID_PARAMETER_MIX;
 168                 }
 169         }
 170
 171         /* now we have to also listen on the specific interfaces,
 172            so that replies always come from the right IP */
 173         for (i=0; i<num_interfaces; i++) {
 174                 const char *address = talloc_strdup(tmp_ctx, iface_list_n_ip(ifaces, i));
 175                 status = cldapd_add_socket(cldapd, lp_ctx, address);
 176                 NT_STATUS_NOT_OK_RETURN(status);
 177         }
 178
 179         talloc_free(tmp_ctx);
 180
 181         return NT_STATUS_OK;
 182 }
 183
 184 /*
 185   startup the cldapd task
 186 */
 187 static void cldapd_task_init(struct task_server *task)
 188 {
 189         struct cldapd_server *cldapd;
 190         NTSTATUS status;
 191         struct interface *ifaces;
 192
 193         load_interface_list(task, task->lp_ctx, &ifaces);
 194
 195         if (iface_list_count(ifaces) == 0) {
 196                 task_server_terminate(task, "cldapd: no network interfaces configured", false);
 197                 return;
 198         }
 199
 200         switch (lpcfg_server_role(task->lp_ctx)) {
 201         case ROLE_STANDALONE:
 202                 task_server_terminate(task, "cldap_server: no CLDAP server required in standalone configuration",
 203                                       false);
 204                 return;
 205         case ROLE_DOMAIN_MEMBER:
 206                 task_server_terminate(task, "cldap_server: no CLDAP server required in member server configuration",
 207                                       false);
 208                 return;
 209         case ROLE_ACTIVE_DIRECTORY_DC:
 210                 /* Yes, we want an CLDAP server */
 211                 break;
 212         }
 213
 214         task_server_set_title(task, "task[cldapd]");
 215
 216         cldapd = talloc(task, struct cldapd_server);
 217         if (cldapd == NULL) {
 218                 task_server_terminate(task, "cldapd: out of memory", true);
 219                 return;
 220         }
 221
 222         cldapd->task = task;
 223         cldapd->samctx = samdb_connect(cldapd, task->event_ctx, task->lp_ctx, system_session(task->lp_ctx), 0);
 224         if (cldapd->samctx == NULL) {
 225                 task_server_terminate(task, "cldapd failed to open samdb", true);
 226                 return;
 227         }
 228
 229         /* start listening on the configured network interfaces */
 230         status = cldapd_startup_interfaces(cldapd, task->lp_ctx, ifaces);
 231         if (!NT_STATUS_IS_OK(status)) {
 232                 task_server_terminate(task, "cldapd failed to setup interfaces", true);
 233                 return;
 234         }
 235
 236         irpc_add_name(task->msg_ctx, "cldap_server");
 237 }
 238
 239
 240 /*
 241   register ourselves as a available server
 242 */
 243 NTSTATUS server_service_cldapd_init(void)
 244 {
 245         return register_server_service("cldap", cldapd_task_init);
 246 }