source4/libnet/libnet_site.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Brad Henry     2005
   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 #include "includes.h"
  21 #include "libnet/libnet.h"
  22 #include "libcli/cldap/cldap.h"
  23 #include <ldb.h>
  24 #include <ldb_errors.h>
  25 #include "libcli/resolve/resolve.h"
  26 #include "param/param.h"
  27 #include "lib/tsocket/tsocket.h"
  28
  29 /**
  30  * 1. Setup a CLDAP socket.
  31  * 2. Lookup the default Site-Name.
  32  */
  33 NTSTATUS libnet_FindSite(TALLOC_CTX *ctx, struct libnet_context *lctx, struct libnet_JoinSite *r)
  34 {
  35         NTSTATUS status;
  36         TALLOC_CTX *tmp_ctx;
  37
  38         char *site_name_str;
  39         char *config_dn_str;
  40         char *server_dn_str;
  41
  42         struct cldap_socket *cldap = NULL;
  43         struct cldap_netlogon search;
  44         int ret;
  45         struct tsocket_address *dest_address;
  46
  47         tmp_ctx = talloc_named(ctx, 0, "libnet_FindSite temp context");
  48         if (!tmp_ctx) {
  49                 r->out.error_string = NULL;
  50                 return NT_STATUS_NO_MEMORY;
  51         }
  52
  53         /* Resolve the site name. */
  54         ZERO_STRUCT(search);
  55         search.in.dest_address = NULL;
  56         search.in.dest_port = 0;
  57         search.in.acct_control = -1;
  58         search.in.version = NETLOGON_NT_VERSION_5 | NETLOGON_NT_VERSION_5EX;
  59         search.in.map_response = true;
  60
  61         ret = tsocket_address_inet_from_strings(tmp_ctx, "ip",
  62                                                 r->in.dest_address,
  63                                                 r->in.cldap_port,
  64                                                 &dest_address);
  65         if (ret != 0) {
  66                 r->out.error_string = NULL;
  67                 status = map_nt_error_from_unix_common(errno);
  68                 return status;
  69         }
  70
  71         /* we want to use non async calls, so we're not passing an event context */
  72         status = cldap_socket_init(tmp_ctx, NULL, dest_address, &cldap);
  73         if (!NT_STATUS_IS_OK(status)) {
  74                 talloc_free(tmp_ctx);
  75                 r->out.error_string = NULL;
  76                 return status;
  77         }
  78         status = cldap_netlogon(cldap, tmp_ctx, &search);
  79         if (!NT_STATUS_IS_OK(status)
  80             || !search.out.netlogon.data.nt5_ex.client_site) {
  81                 /*
  82                   If cldap_netlogon() returns in error,
  83                   default to using Default-First-Site-Name.
  84                 */
  85                 site_name_str = talloc_asprintf(tmp_ctx, "%s",
  86                                                 "Default-First-Site-Name");
  87                 if (!site_name_str) {
  88                         r->out.error_string = NULL;
  89                         talloc_free(tmp_ctx);
  90                         return NT_STATUS_NO_MEMORY;
  91                 }
  92         } else {
  93                 site_name_str = talloc_asprintf(tmp_ctx, "%s",
  94                                         search.out.netlogon.data.nt5_ex.client_site);
  95                 if (!site_name_str) {
  96                         r->out.error_string = NULL;
  97                         talloc_free(tmp_ctx);
  98                         return NT_STATUS_NO_MEMORY;
  99                 }
 100         }
 101
 102         /* Generate the CN=Configuration,... DN. */
 103 /* TODO: look it up! */
 104         config_dn_str = talloc_asprintf(tmp_ctx, "CN=Configuration,%s", r->in.domain_dn_str);
 105         if (!config_dn_str) {
 106                 r->out.error_string = NULL;
 107                 talloc_free(tmp_ctx);
 108                 return NT_STATUS_NO_MEMORY;
 109         }
 110
 111         /* Generate the CN=Servers,... DN. */
 112         server_dn_str = talloc_asprintf(tmp_ctx, "CN=%s,CN=Servers,CN=%s,CN=Sites,%s",
 113                                                  r->in.netbios_name, site_name_str, config_dn_str);
 114         if (!server_dn_str) {
 115                 r->out.error_string = NULL;
 116                 talloc_free(tmp_ctx);
 117                 return NT_STATUS_NO_MEMORY;
 118         }
 119
 120         r->out.site_name_str = site_name_str;
 121         talloc_steal(r, site_name_str);
 122
 123         r->out.config_dn_str = config_dn_str;
 124         talloc_steal(r, config_dn_str);
 125
 126         r->out.server_dn_str = server_dn_str;
 127         talloc_steal(r, server_dn_str);
 128
 129         talloc_free(tmp_ctx);
 130         return NT_STATUS_OK;
 131 }
 132
 133 /*
 134  * find out Site specific stuff:
 135  * 1. Lookup the Site name.
 136  * 2. Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 137  * TODO: 3.) use DsAddEntry() to create CN=NTDS Settings,CN=<netbios name>,CN=Servers,CN=<site name>,...
 138  */
 139 NTSTATUS libnet_JoinSite(struct libnet_context *ctx,
 140                          struct ldb_context *remote_ldb,
 141                          struct libnet_JoinDomain *libnet_r)
 142 {
 143         NTSTATUS status;
 144         TALLOC_CTX *tmp_ctx;
 145
 146         struct libnet_JoinSite *r;
 147
 148         struct ldb_dn *server_dn;
 149         struct ldb_message *msg;
 150         int rtn;
 151
 152         const char *server_dn_str;
 153         struct nbt_name name;
 154         const char *dest_addr = NULL;
 155
 156         tmp_ctx = talloc_named(libnet_r, 0, "libnet_JoinSite temp context");
 157         if (!tmp_ctx) {
 158                 libnet_r->out.error_string = NULL;
 159                 return NT_STATUS_NO_MEMORY;
 160         }
 161
 162         r = talloc(tmp_ctx, struct libnet_JoinSite);
 163         if (!r) {
 164                 libnet_r->out.error_string = NULL;
 165                 talloc_free(tmp_ctx);
 166                 return NT_STATUS_NO_MEMORY;
 167         }
 168
 169         make_nbt_name_client(&name, libnet_r->out.samr_binding->host);
 170         status = resolve_name_ex(lpcfg_resolve_context(ctx->lp_ctx),
 171                                  0, 0,
 172                                  &name, r, &dest_addr, ctx->event_ctx);
 173         if (!NT_STATUS_IS_OK(status)) {
 174                 libnet_r->out.error_string = NULL;
 175                 talloc_free(tmp_ctx);
 176                 return status;
 177         }
 178
 179         /* Resolve the site name and AD DN's. */
 180         r->in.dest_address = dest_addr;
 181         r->in.netbios_name = libnet_r->in.netbios_name;
 182         r->in.domain_dn_str = libnet_r->out.domain_dn_str;
 183         r->in.cldap_port = lpcfg_cldap_port(ctx->lp_ctx);
 184
 185         status = libnet_FindSite(tmp_ctx, ctx, r);
 186         if (!NT_STATUS_IS_OK(status)) {
 187                 libnet_r->out.error_string =
 188                         talloc_steal(libnet_r, r->out.error_string);
 189                 talloc_free(tmp_ctx);
 190                 return status;
 191         }
 192
 193         server_dn_str = r->out.server_dn_str;
 194
 195         /*
 196          Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 197         */
 198         msg = ldb_msg_new(tmp_ctx);
 199         if (!msg) {
 200                 libnet_r->out.error_string = NULL;
 201                 talloc_free(tmp_ctx);
 202                 return NT_STATUS_NO_MEMORY;
 203         }
 204
 205         rtn = ldb_msg_add_string(msg, "objectClass", "server");
 206         if (rtn != LDB_SUCCESS) {
 207                 libnet_r->out.error_string = NULL;
 208                 talloc_free(tmp_ctx);
 209                 return NT_STATUS_NO_MEMORY;
 210         }
 211         rtn = ldb_msg_add_string(msg, "systemFlags", "50000000");
 212         if (rtn != LDB_SUCCESS) {
 213                 libnet_r->out.error_string = NULL;
 214                 talloc_free(tmp_ctx);
 215                 return NT_STATUS_NO_MEMORY;
 216         }
 217         rtn = ldb_msg_add_string(msg, "serverReference", libnet_r->out.account_dn_str);
 218         if (rtn != LDB_SUCCESS) {
 219                 libnet_r->out.error_string = NULL;
 220                 talloc_free(tmp_ctx);
 221                 return NT_STATUS_NO_MEMORY;
 222         }
 223
 224         server_dn = ldb_dn_new(tmp_ctx, remote_ldb, server_dn_str);
 225         if ( ! ldb_dn_validate(server_dn)) {
 226                 libnet_r->out.error_string = talloc_asprintf(libnet_r,
 227                                         "Invalid server dn: %s",
 228                                         server_dn_str);
 229                 talloc_free(tmp_ctx);
 230                 return NT_STATUS_UNSUCCESSFUL;
 231         }
 232
 233         msg->dn = server_dn;
 234
 235         rtn = ldb_add(remote_ldb, msg);
 236         if (rtn == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 237                 unsigned int i;
 238
 239                 /* make a 'modify' msg, and only for serverReference */
 240                 msg = ldb_msg_new(tmp_ctx);
 241                 if (!msg) {
 242                         libnet_r->out.error_string = NULL;
 243                         talloc_free(tmp_ctx);
 244                         return NT_STATUS_NO_MEMORY;
 245                 }
 246                 msg->dn = server_dn;
 247
 248                 rtn = ldb_msg_add_string(msg, "serverReference",libnet_r->out.account_dn_str);
 249                 if (rtn != LDB_SUCCESS) {
 250                         libnet_r->out.error_string = NULL;
 251                         talloc_free(tmp_ctx);
 252                         return NT_STATUS_NO_MEMORY;
 253                 }
 254
 255                 /* mark all the message elements (should be just one)
 256                    as LDB_FLAG_MOD_REPLACE */
 257                 for (i=0;i<msg->num_elements;i++) {
 258                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 259                 }
 260
 261                 rtn = ldb_modify(remote_ldb, msg);
 262                 if (rtn != LDB_SUCCESS) {
 263                         libnet_r->out.error_string
 264                                 = talloc_asprintf(libnet_r,
 265                                                   "Failed to modify server entry %s: %s: %d",
 266                                                   server_dn_str,
 267                                                   ldb_errstring(remote_ldb), rtn);
 268                         talloc_free(tmp_ctx);
 269                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 270                 }
 271         } else if (rtn != LDB_SUCCESS) {
 272                 libnet_r->out.error_string
 273                         = talloc_asprintf(libnet_r,
 274                                 "Failed to add server entry %s: %s: %d",
 275                                 server_dn_str, ldb_errstring(remote_ldb),
 276                                 rtn);
 277                 talloc_free(tmp_ctx);
 278                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 279         }
 280         DEBUG(0, ("We still need to perform a DsAddEntry() so that we can create the CN=NTDS Settings container.\n"));
 281
 282         /* Store the server DN in libnet_r */
 283         libnet_r->out.server_dn_str = server_dn_str;
 284         talloc_steal(libnet_r, server_dn_str);
 285
 286         talloc_free(tmp_ctx);
 287         return NT_STATUS_OK;
 288 }