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 "libcli/ldap/ldap.h"
  24 #include "lib/socket/socket.h"
  25 #include "lib/messaging/irpc.h"
  26 #include "smbd/service_task.h"
  27 #include "smbd/service.h"
  28 #include "cldap_server/cldap_server.h"
  29 #include "system/network.h"
  30 #include "lib/socket/netif.h"
  31 #include "lib/ldb/include/ldb.h"
  32 #include "lib/ldb/include/ldb_errors.h"
  33 #include "dsdb/samdb/samdb.h"
  34 #include "db_wrap.h"
  35 #include "auth/auth.h"
  36
  37 /*
  38   handle incoming cldap requests
  39 */
  40 static void cldapd_request_handler(struct cldap_socket *cldap,
  41                                    struct ldap_message *ldap_msg,
  42                                    struct socket_address *src)
  43 {
  44         struct ldap_SearchRequest *search;
  45         if (ldap_msg->type != LDAP_TAG_SearchRequest) {
  46                 DEBUG(0,("Invalid CLDAP request type %d from %s:%d\n",
  47                          ldap_msg->type, src->addr, src->port));
  48                 cldap_error_reply(cldap, ldap_msg->messageid, src,
  49                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP request");
  50                 return;
  51         }
  52
  53         search = &ldap_msg->r.SearchRequest;
  54
  55         if (strcmp("", search->basedn) != 0) {
  56                 DEBUG(0,("Invalid CLDAP basedn '%s' from %s:%d\n",
  57                          search->basedn, src->addr, src->port));
  58                 cldap_error_reply(cldap, ldap_msg->messageid, src,
  59                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP basedn");
  60                 return;
  61         }
  62
  63         if (search->scope != LDAP_SEARCH_SCOPE_BASE) {
  64                 DEBUG(0,("Invalid CLDAP scope %d from %s:%d\n",
  65                          search->scope, src->addr, src->port));
  66                 cldap_error_reply(cldap, ldap_msg->messageid, src,
  67                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP scope");
  68                 return;
  69         }
  70
  71         if (search->num_attributes == 1 &&
  72             strcasecmp(search->attributes[0], "netlogon") == 0) {
  73                 cldapd_netlogon_request(cldap, ldap_msg->messageid,
  74                                         search->tree, src);
  75                 return;
  76         }
  77
  78         cldapd_rootdse_request(cldap, ldap_msg->messageid,
  79                                search, src);
  80 }
  81
  82
  83 /*
  84   start listening on the given address
  85 */
  86 static NTSTATUS cldapd_add_socket(struct cldapd_server *cldapd, const char *address)
  87 {
  88         struct cldap_socket *cldapsock;
  89         struct socket_address *socket_address;
  90         NTSTATUS status;
  91
  92         /* listen for unicasts on the CLDAP port (389) */
  93         cldapsock = cldap_socket_init(cldapd, cldapd->task->event_ctx);
  94         NT_STATUS_HAVE_NO_MEMORY(cldapsock);
  95
  96         socket_address = socket_address_from_strings(cldapsock, cldapsock->sock->backend_name,
  97                                                      address, lp_cldap_port());
  98         if (!socket_address) {
  99                 talloc_free(cldapsock);
 100                 return NT_STATUS_NO_MEMORY;
 101         }
 102
 103         status = socket_listen(cldapsock->sock, socket_address, 0, 0);
 104         if (!NT_STATUS_IS_OK(status)) {
 105                 DEBUG(0,("Failed to bind to %s:%d - %s\n",
 106                          address, lp_cldap_port(), nt_errstr(status)));
 107                 talloc_free(cldapsock);
 108                 return status;
 109         }
 110
 111         talloc_free(socket_address);
 112
 113         cldap_set_incoming_handler(cldapsock, cldapd_request_handler, cldapd);
 114
 115         return NT_STATUS_OK;
 116 }
 117
 118
 119 /*
 120   setup our listening sockets on the configured network interfaces
 121 */
 122 static NTSTATUS cldapd_startup_interfaces(struct cldapd_server *cldapd)
 123 {
 124         int num_interfaces = iface_count();
 125         TALLOC_CTX *tmp_ctx = talloc_new(cldapd);
 126         NTSTATUS status;
 127
 128         /* if we are allowing incoming packets from any address, then
 129            we need to bind to the wildcard address */
 130         if (!lp_bind_interfaces_only()) {
 131                 status = cldapd_add_socket(cldapd, "0.0.0.0");
 132                 NT_STATUS_NOT_OK_RETURN(status);
 133         } else {
 134                 int i;
 135
 136                 for (i=0; i<num_interfaces; i++) {
 137                         const char *address = talloc_strdup(tmp_ctx, iface_n_ip(i));
 138                         status = cldapd_add_socket(cldapd, address);
 139                         NT_STATUS_NOT_OK_RETURN(status);
 140                 }
 141         }
 142
 143         talloc_free(tmp_ctx);
 144
 145         return NT_STATUS_OK;
 146 }
 147
 148 /*
 149   startup the cldapd task
 150 */
 151 static void cldapd_task_init(struct task_server *task)
 152 {
 153         struct cldapd_server *cldapd;
 154         NTSTATUS status;
 155
 156         if (iface_count() == 0) {
 157                 task_server_terminate(task, "cldapd: no network interfaces configured");
 158                 return;
 159         }
 160
 161         task_server_set_title(task, "task[cldapd]");
 162
 163         cldapd = talloc(task, struct cldapd_server);
 164         if (cldapd == NULL) {
 165                 task_server_terminate(task, "cldapd: out of memory");
 166                 return;
 167         }
 168
 169         cldapd->task = task;
 170         cldapd->samctx = samdb_connect(cldapd, anonymous_session(cldapd));
 171         if (cldapd->samctx == NULL) {
 172                 task_server_terminate(task, "cldapd failed to open samdb");
 173                 return;
 174         }
 175
 176         /* start listening on the configured network interfaces */
 177         status = cldapd_startup_interfaces(cldapd);
 178         if (!NT_STATUS_IS_OK(status)) {
 179                 task_server_terminate(task, "cldapd failed to setup interfaces");
 180                 return;
 181         }
 182
 183         irpc_add_name(task->msg_ctx, "cldap_server");
 184 }
 185
 186
 187 /*
 188   initialise the cldapd server
 189  */
 190 static NTSTATUS cldapd_init(struct event_context *event_ctx, const struct model_ops *model_ops)
 191 {
 192         return task_server_startup(event_ctx, model_ops, cldapd_task_init);
 193 }
 194
 195
 196 /*
 197   register ourselves as a available server
 198 */
 199 NTSTATUS server_service_cldapd_init(void)
 200 {
 201         return register_server_service("cldap", cldapd_init);
 202 }