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                 talloc_free(tmp_ctx);
  69                 return status;
  70         }
  71
  72         /* we want to use non async calls, so we're not passing an event context */
  73         status = cldap_socket_init(tmp_ctx, NULL, dest_address, &cldap);
  74         if (!NT_STATUS_IS_OK(status)) {
  75                 talloc_free(tmp_ctx);
  76                 r->out.error_string = NULL;
  77                 return status;
  78         }
  79         status = cldap_netlogon(cldap, tmp_ctx, &search);
  80         if (!NT_STATUS_IS_OK(status)
  81             || !search.out.netlogon.data.nt5_ex.client_site) {
  82                 /*
  83                   If cldap_netlogon() returns in error,
  84                   default to using Default-First-Site-Name.
  85                 */
  86                 site_name_str = talloc_asprintf(tmp_ctx, "%s",
  87                                                 "Default-First-Site-Name");
  88                 if (!site_name_str) {
  89                         r->out.error_string = NULL;
  90                         talloc_free(tmp_ctx);
  91                         return NT_STATUS_NO_MEMORY;
  92                 }
  93         } else {
  94                 site_name_str = talloc_asprintf(tmp_ctx, "%s",
  95                                         search.out.netlogon.data.nt5_ex.client_site);
  96                 if (!site_name_str) {
  97                         r->out.error_string = NULL;
  98                         talloc_free(tmp_ctx);
  99                         return NT_STATUS_NO_MEMORY;
 100                 }
 101         }
 102
 103         /* Generate the CN=Configuration,... DN. */
 104 /* TODO: look it up! */
 105         config_dn_str = talloc_asprintf(tmp_ctx, "CN=Configuration,%s", r->in.domain_dn_str);
 106         if (!config_dn_str) {
 107                 r->out.error_string = NULL;
 108                 talloc_free(tmp_ctx);
 109                 return NT_STATUS_NO_MEMORY;
 110         }
 111
 112         /* Generate the CN=Servers,... DN. */
 113         server_dn_str = talloc_asprintf(tmp_ctx, "CN=%s,CN=Servers,CN=%s,CN=Sites,%s",
 114                                                  r->in.netbios_name, site_name_str, config_dn_str);
 115         if (!server_dn_str) {
 116                 r->out.error_string = NULL;
 117                 talloc_free(tmp_ctx);
 118                 return NT_STATUS_NO_MEMORY;
 119         }
 120
 121         r->out.site_name_str = site_name_str;
 122         talloc_steal(r, site_name_str);
 123
 124         r->out.config_dn_str = config_dn_str;
 125         talloc_steal(r, config_dn_str);
 126
 127         r->out.server_dn_str = server_dn_str;
 128         talloc_steal(r, server_dn_str);
 129
 130         talloc_free(tmp_ctx);
 131         return NT_STATUS_OK;
 132 }
 133
 134 /*
 135  * find out Site specific stuff:
 136  * 1. Lookup the Site name.
 137  * 2. Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 138  * TODO: 3.) use DsAddEntry() to create CN=NTDS Settings,CN=<netbios name>,CN=Servers,CN=<site name>,...
 139  */
 140 NTSTATUS libnet_JoinSite(struct libnet_context *ctx,
 141                          struct ldb_context *remote_ldb,
 142                          struct libnet_JoinDomain *libnet_r)
 143 {
 144         NTSTATUS status;
 145         TALLOC_CTX *tmp_ctx;
 146
 147         struct libnet_JoinSite *r;
 148
 149         struct ldb_dn *server_dn;
 150         struct ldb_message *msg;
 151         int rtn;
 152
 153         const char *server_dn_str;
 154         const char *host;
 155         struct nbt_name name;
 156         const char *dest_addr = NULL;
 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         host = dcerpc_binding_get_string_option(libnet_r->out.samr_binding, "host");
 172         make_nbt_name_client(&name, host);
 173         status = resolve_name_ex(lpcfg_resolve_context(ctx->lp_ctx),
 174                                  0, 0,
 175                                  &name, r, &dest_addr, ctx->event_ctx);
 176         if (!NT_STATUS_IS_OK(status)) {
 177                 libnet_r->out.error_string = NULL;
 178                 talloc_free(tmp_ctx);
 179                 return status;
 180         }
 181
 182         /* Resolve the site name and AD DN's. */
 183         r->in.dest_address = dest_addr;
 184         r->in.netbios_name = libnet_r->in.netbios_name;
 185         r->in.domain_dn_str = libnet_r->out.domain_dn_str;
 186         r->in.cldap_port = lpcfg_cldap_port(ctx->lp_ctx);
 187
 188         status = libnet_FindSite(tmp_ctx, ctx, r);
 189         if (!NT_STATUS_IS_OK(status)) {
 190                 libnet_r->out.error_string =
 191                         talloc_steal(libnet_r, r->out.error_string);
 192                 talloc_free(tmp_ctx);
 193                 return status;
 194         }
 195
 196         server_dn_str = r->out.server_dn_str;
 197
 198         /*
 199          Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 200         */
 201         msg = ldb_msg_new(tmp_ctx);
 202         if (!msg) {
 203                 libnet_r->out.error_string = NULL;
 204                 talloc_free(tmp_ctx);
 205                 return NT_STATUS_NO_MEMORY;
 206         }
 207
 208         rtn = ldb_msg_add_string(msg, "objectClass", "server");
 209         if (rtn != LDB_SUCCESS) {
 210                 libnet_r->out.error_string = NULL;
 211                 talloc_free(tmp_ctx);
 212                 return NT_STATUS_NO_MEMORY;
 213         }
 214         rtn = ldb_msg_add_string(msg, "systemFlags", "50000000");
 215         if (rtn != LDB_SUCCESS) {
 216                 libnet_r->out.error_string = NULL;
 217                 talloc_free(tmp_ctx);
 218                 return NT_STATUS_NO_MEMORY;
 219         }
 220         rtn = ldb_msg_add_string(msg, "serverReference", libnet_r->out.account_dn_str);
 221         if (rtn != LDB_SUCCESS) {
 222                 libnet_r->out.error_string = NULL;
 223                 talloc_free(tmp_ctx);
 224                 return NT_STATUS_NO_MEMORY;
 225         }
 226
 227         server_dn = ldb_dn_new(tmp_ctx, remote_ldb, server_dn_str);
 228         if ( ! ldb_dn_validate(server_dn)) {
 229                 libnet_r->out.error_string = talloc_asprintf(libnet_r,
 230                                         "Invalid server dn: %s",
 231                                         server_dn_str);
 232                 talloc_free(tmp_ctx);
 233                 return NT_STATUS_UNSUCCESSFUL;
 234         }
 235
 236         msg->dn = server_dn;
 237
 238         rtn = ldb_add(remote_ldb, msg);
 239         if (rtn == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 240                 unsigned int i;
 241
 242                 /* make a 'modify' msg, and only for serverReference */
 243                 msg = ldb_msg_new(tmp_ctx);
 244                 if (!msg) {
 245                         libnet_r->out.error_string = NULL;
 246                         talloc_free(tmp_ctx);
 247                         return NT_STATUS_NO_MEMORY;
 248                 }
 249                 msg->dn = server_dn;
 250
 251                 rtn = ldb_msg_add_string(msg, "serverReference",libnet_r->out.account_dn_str);
 252                 if (rtn != LDB_SUCCESS) {
 253                         libnet_r->out.error_string = NULL;
 254                         talloc_free(tmp_ctx);
 255                         return NT_STATUS_NO_MEMORY;
 256                 }
 257
 258                 /* mark all the message elements (should be just one)
 259                    as LDB_FLAG_MOD_REPLACE */
 260                 for (i=0;i<msg->num_elements;i++) {
 261                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 262                 }
 263
 264                 rtn = ldb_modify(remote_ldb, msg);
 265                 if (rtn != LDB_SUCCESS) {
 266                         libnet_r->out.error_string
 267                                 = talloc_asprintf(libnet_r,
 268                                                   "Failed to modify server entry %s: %s: %d",
 269                                                   server_dn_str,
 270                                                   ldb_errstring(remote_ldb), rtn);
 271                         talloc_free(tmp_ctx);
 272                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 273                 }
 274         } else if (rtn != LDB_SUCCESS) {
 275                 libnet_r->out.error_string
 276                         = talloc_asprintf(libnet_r,
 277                                 "Failed to add server entry %s: %s: %d",
 278                                 server_dn_str, ldb_errstring(remote_ldb),
 279                                 rtn);
 280                 talloc_free(tmp_ctx);
 281                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 282         }
 283         DEBUG(0, ("We still need to perform a DsAddEntry() so that we can create the CN=NTDS Settings container.\n"));
 284
 285         /* Store the server DN in libnet_r */
 286         libnet_r->out.server_dn_str = server_dn_str;
 287         talloc_steal(libnet_r, server_dn_str);
 288
 289         talloc_free(tmp_ctx);
 290         return NT_STATUS_OK;
 291 }