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 "lib/ldb/include/ldb.h"
  24 #include "lib/ldb/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(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, 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, lp_iconv_convenience(lctx->lp_ctx), 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         const char *config_dn_str;
 154         struct nbt_name name;
 155         const char *dest_addr = NULL;
 156         char *dns_host_name;
 157
 158         tmp_ctx = talloc_named(libnet_r, 0, "libnet_JoinSite temp context");
 159         if (!tmp_ctx) {
 160                 libnet_r->out.error_string = NULL;
 161                 return NT_STATUS_NO_MEMORY;
 162         }
 163
 164         r = talloc(tmp_ctx, struct libnet_JoinSite);
 165         if (!r) {
 166                 libnet_r->out.error_string = NULL;
 167                 talloc_free(tmp_ctx);
 168                 return NT_STATUS_NO_MEMORY;
 169         }
 170
 171         make_nbt_name_client(&name, libnet_r->out.samr_binding->host);
 172         status = resolve_name(lp_resolve_context(ctx->lp_ctx), &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 = lp_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         config_dn_str = r->out.config_dn_str;
 194         server_dn_str = r->out.server_dn_str;
 195
 196         /*
 197          Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 198         */
 199         msg = ldb_msg_new(tmp_ctx);
 200         if (!msg) {
 201                 libnet_r->out.error_string = NULL;
 202                 talloc_free(tmp_ctx);
 203                 return NT_STATUS_NO_MEMORY;
 204         }
 205
 206         rtn = ldb_msg_add_string(msg, "objectClass", "server");
 207         if (rtn != 0) {
 208                 libnet_r->out.error_string = NULL;
 209                 talloc_free(tmp_ctx);
 210                 return NT_STATUS_NO_MEMORY;
 211         }
 212         rtn = ldb_msg_add_string(msg, "systemFlags", "50000000");
 213         if (rtn != 0) {
 214                 libnet_r->out.error_string = NULL;
 215                 talloc_free(tmp_ctx);
 216                 return NT_STATUS_NO_MEMORY;
 217         }
 218         rtn = ldb_msg_add_string(msg, "serverReference", libnet_r->out.account_dn_str);
 219         if (rtn != 0) {
 220                 libnet_r->out.error_string = NULL;
 221                 talloc_free(tmp_ctx);
 222                 return NT_STATUS_NO_MEMORY;
 223         }
 224         dns_host_name = talloc_asprintf(tmp_ctx, "%s.%s",
 225                                         libnet_r->in.netbios_name, libnet_r->out.realm);
 226         if (!dns_host_name) {
 227                 r->out.error_string = NULL;
 228                 talloc_free(tmp_ctx);
 229                 return NT_STATUS_NO_MEMORY;
 230         }
 231         strlower_m(dns_host_name);
 232         rtn = ldb_msg_add_string(msg, "dNSHostName", dns_host_name);
 233
 234         server_dn = ldb_dn_new(tmp_ctx, remote_ldb, server_dn_str);
 235         if ( ! ldb_dn_validate(server_dn)) {
 236                 libnet_r->out.error_string = talloc_asprintf(libnet_r,
 237                                         "Invalid server dn: %s",
 238                                         server_dn_str);
 239                 talloc_free(tmp_ctx);
 240                 return NT_STATUS_UNSUCCESSFUL;
 241         }
 242
 243         msg->dn = server_dn;
 244
 245         rtn = ldb_add(remote_ldb, msg);
 246         if (rtn == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 247                 unsigned int i;
 248
 249                 /* make a 'modify' msg, and only for serverReference */
 250                 msg = ldb_msg_new(tmp_ctx);
 251                 if (!msg) {
 252                         libnet_r->out.error_string = NULL;
 253                         talloc_free(tmp_ctx);
 254                         return NT_STATUS_NO_MEMORY;
 255                 }
 256                 msg->dn = server_dn;
 257
 258                 rtn = ldb_msg_add_string(msg, "serverReference",libnet_r->out.account_dn_str);
 259                 if (rtn != 0) {
 260                         libnet_r->out.error_string = NULL;
 261                         talloc_free(tmp_ctx);
 262                         return NT_STATUS_NO_MEMORY;
 263                 }
 264
 265                 /* mark all the message elements (should be just one)
 266                    as LDB_FLAG_MOD_REPLACE */
 267                 for (i=0;i<msg->num_elements;i++) {
 268                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 269                 }
 270
 271                 rtn = ldb_modify(remote_ldb, msg);
 272                 if (rtn != 0) {
 273                         libnet_r->out.error_string
 274                                 = talloc_asprintf(libnet_r,
 275                                                   "Failed to modify server entry %s: %s: %d",
 276                                                   server_dn_str,
 277                                                   ldb_errstring(remote_ldb), rtn);
 278                         talloc_free(tmp_ctx);
 279                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 280                 }
 281         } else if (rtn != 0) {
 282                 libnet_r->out.error_string
 283                         = talloc_asprintf(libnet_r,
 284                                 "Failed to add server entry %s: %s: %d",
 285                                 server_dn_str, ldb_errstring(remote_ldb),
 286                                 rtn);
 287                 talloc_free(tmp_ctx);
 288                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 289         }
 290         DEBUG(0, ("We still need to perform a DsAddEntry() so that we can create the CN=NTDS Settings container.\n"));
 291
 292         /* Store the server DN in libnet_r */
 293         libnet_r->out.server_dn_str = server_dn_str;
 294         talloc_steal(libnet_r, server_dn_str);
 295
 296         talloc_free(tmp_ctx);
 297         return NT_STATUS_OK;
 298 }