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 == NULL
  82             || search.out.netlogon.data.nt5_ex.client_site[0] == '\0') {
  83                 /*
  84                   If cldap_netlogon() returns in error,
  85                   default to using Default-First-Site-Name.
  86                 */
  87                 site_name_str = talloc_asprintf(tmp_ctx, "%s",
  88                                                 "Default-First-Site-Name");
  89                 if (!site_name_str) {
  90                         r->out.error_string = NULL;
  91                         talloc_free(tmp_ctx);
  92                         return NT_STATUS_NO_MEMORY;
  93                 }
  94         } else {
  95                 site_name_str = talloc_asprintf(tmp_ctx, "%s",
  96                                         search.out.netlogon.data.nt5_ex.client_site);
  97                 if (!site_name_str) {
  98                         r->out.error_string = NULL;
  99                         talloc_free(tmp_ctx);
 100                         return NT_STATUS_NO_MEMORY;
 101                 }
 102         }
 103
 104         /* Generate the CN=Configuration,... DN. */
 105 /* TODO: look it up! */
 106         config_dn_str = talloc_asprintf(tmp_ctx, "CN=Configuration,%s", r->in.domain_dn_str);
 107         if (!config_dn_str) {
 108                 r->out.error_string = NULL;
 109                 talloc_free(tmp_ctx);
 110                 return NT_STATUS_NO_MEMORY;
 111         }
 112
 113         /* Generate the CN=Servers,... DN. */
 114         server_dn_str = talloc_asprintf(tmp_ctx, "CN=%s,CN=Servers,CN=%s,CN=Sites,%s",
 115                                                  r->in.netbios_name, site_name_str, config_dn_str);
 116         if (!server_dn_str) {
 117                 r->out.error_string = NULL;
 118                 talloc_free(tmp_ctx);
 119                 return NT_STATUS_NO_MEMORY;
 120         }
 121
 122         r->out.site_name_str = site_name_str;
 123         talloc_steal(r, site_name_str);
 124
 125         r->out.config_dn_str = config_dn_str;
 126         talloc_steal(r, config_dn_str);
 127
 128         r->out.server_dn_str = server_dn_str;
 129         talloc_steal(r, server_dn_str);
 130
 131         talloc_free(tmp_ctx);
 132         return NT_STATUS_OK;
 133 }
 134
 135 /*
 136  * find out Site specific stuff:
 137  * 1. Lookup the Site name.
 138  * 2. Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 139  * TODO: 3.) use DsAddEntry() to create CN=NTDS Settings,CN=<netbios name>,CN=Servers,CN=<site name>,...
 140  */
 141 NTSTATUS libnet_JoinSite(struct libnet_context *ctx,
 142                          struct ldb_context *remote_ldb,
 143                          struct libnet_JoinDomain *libnet_r)
 144 {
 145         NTSTATUS status;
 146         TALLOC_CTX *tmp_ctx;
 147
 148         struct libnet_JoinSite *r;
 149
 150         struct ldb_dn *server_dn;
 151         struct ldb_message *msg;
 152         int rtn;
 153
 154         const char *server_dn_str;
 155         const char *host;
 156         struct nbt_name name;
 157         const char *dest_addr = NULL;
 158
 159         tmp_ctx = talloc_named(libnet_r, 0, "libnet_JoinSite temp context");
 160         if (!tmp_ctx) {
 161                 libnet_r->out.error_string = NULL;
 162                 return NT_STATUS_NO_MEMORY;
 163         }
 164
 165         r = talloc(tmp_ctx, struct libnet_JoinSite);
 166         if (!r) {
 167                 libnet_r->out.error_string = NULL;
 168                 talloc_free(tmp_ctx);
 169                 return NT_STATUS_NO_MEMORY;
 170         }
 171
 172         host = dcerpc_binding_get_string_option(libnet_r->out.samr_binding, "host");
 173         make_nbt_name_client(&name, host);
 174         status = resolve_name_ex(lpcfg_resolve_context(ctx->lp_ctx),
 175                                  0, 0,
 176                                  &name, r, &dest_addr, ctx->event_ctx);
 177         if (!NT_STATUS_IS_OK(status)) {
 178                 libnet_r->out.error_string = NULL;
 179                 talloc_free(tmp_ctx);
 180                 return status;
 181         }
 182
 183         /* Resolve the site name and AD DN's. */
 184         r->in.dest_address = dest_addr;
 185         r->in.netbios_name = libnet_r->in.netbios_name;
 186         r->in.domain_dn_str = libnet_r->out.domain_dn_str;
 187         r->in.cldap_port = lpcfg_cldap_port(ctx->lp_ctx);
 188
 189         status = libnet_FindSite(tmp_ctx, ctx, r);
 190         if (!NT_STATUS_IS_OK(status)) {
 191                 libnet_r->out.error_string =
 192                         talloc_steal(libnet_r, r->out.error_string);
 193                 talloc_free(tmp_ctx);
 194                 return status;
 195         }
 196
 197         server_dn_str = r->out.server_dn_str;
 198
 199         /*
 200          Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 201         */
 202         msg = ldb_msg_new(tmp_ctx);
 203         if (!msg) {
 204                 libnet_r->out.error_string = NULL;
 205                 talloc_free(tmp_ctx);
 206                 return NT_STATUS_NO_MEMORY;
 207         }
 208
 209         rtn = ldb_msg_add_string(msg, "objectClass", "server");
 210         if (rtn != LDB_SUCCESS) {
 211                 libnet_r->out.error_string = NULL;
 212                 talloc_free(tmp_ctx);
 213                 return NT_STATUS_NO_MEMORY;
 214         }
 215         rtn = ldb_msg_add_string(msg, "systemFlags", "50000000");
 216         if (rtn != LDB_SUCCESS) {
 217                 libnet_r->out.error_string = NULL;
 218                 talloc_free(tmp_ctx);
 219                 return NT_STATUS_NO_MEMORY;
 220         }
 221         rtn = ldb_msg_add_string(msg, "serverReference", libnet_r->out.account_dn_str);
 222         if (rtn != LDB_SUCCESS) {
 223                 libnet_r->out.error_string = NULL;
 224                 talloc_free(tmp_ctx);
 225                 return NT_STATUS_NO_MEMORY;
 226         }
 227
 228         server_dn = ldb_dn_new(tmp_ctx, remote_ldb, server_dn_str);
 229         if ( ! ldb_dn_validate(server_dn)) {
 230                 libnet_r->out.error_string = talloc_asprintf(libnet_r,
 231                                         "Invalid server dn: %s",
 232                                         server_dn_str);
 233                 talloc_free(tmp_ctx);
 234                 return NT_STATUS_UNSUCCESSFUL;
 235         }
 236
 237         msg->dn = server_dn;
 238
 239         rtn = ldb_add(remote_ldb, msg);
 240         if (rtn == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 241                 unsigned int i;
 242
 243                 /* make a 'modify' msg, and only for serverReference */
 244                 msg = ldb_msg_new(tmp_ctx);
 245                 if (!msg) {
 246                         libnet_r->out.error_string = NULL;
 247                         talloc_free(tmp_ctx);
 248                         return NT_STATUS_NO_MEMORY;
 249                 }
 250                 msg->dn = server_dn;
 251
 252                 rtn = ldb_msg_add_string(msg, "serverReference",libnet_r->out.account_dn_str);
 253                 if (rtn != LDB_SUCCESS) {
 254                         libnet_r->out.error_string = NULL;
 255                         talloc_free(tmp_ctx);
 256                         return NT_STATUS_NO_MEMORY;
 257                 }
 258
 259                 /* mark all the message elements (should be just one)
 260                    as LDB_FLAG_MOD_REPLACE */
 261                 for (i=0;i<msg->num_elements;i++) {
 262                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 263                 }
 264
 265                 rtn = ldb_modify(remote_ldb, msg);
 266                 if (rtn != LDB_SUCCESS) {
 267                         libnet_r->out.error_string
 268                                 = talloc_asprintf(libnet_r,
 269                                                   "Failed to modify server entry %s: %s: %d",
 270                                                   server_dn_str,
 271                                                   ldb_errstring(remote_ldb), rtn);
 272                         talloc_free(tmp_ctx);
 273                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 274                 }
 275         } else if (rtn != LDB_SUCCESS) {
 276                 libnet_r->out.error_string
 277                         = talloc_asprintf(libnet_r,
 278                                 "Failed to add server entry %s: %s: %d",
 279                                 server_dn_str, ldb_errstring(remote_ldb),
 280                                 rtn);
 281                 talloc_free(tmp_ctx);
 282                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 283         }
 284         DEBUG(0, ("We still need to perform a DsAddEntry() so that we can create the CN=NTDS Settings container.\n"));
 285
 286         /* Store the server DN in libnet_r */
 287         libnet_r->out.server_dn_str = server_dn_str;
 288         talloc_steal(libnet_r, server_dn_str);
 289
 290         talloc_free(tmp_ctx);
 291         return NT_STATUS_OK;
 292 }