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(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, 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
 157         tmp_ctx = talloc_named(libnet_r, 0, "libnet_JoinSite temp context");
 158         if (!tmp_ctx) {
 159                 libnet_r->out.error_string = NULL;
 160                 return NT_STATUS_NO_MEMORY;
 161         }
 162
 163         r = talloc(tmp_ctx, struct libnet_JoinSite);
 164         if (!r) {
 165                 libnet_r->out.error_string = NULL;
 166                 talloc_free(tmp_ctx);
 167                 return NT_STATUS_NO_MEMORY;
 168         }
 169
 170         make_nbt_name_client(&name, libnet_r->out.samr_binding->host);
 171         status = resolve_name_ex(lpcfg_resolve_context(ctx->lp_ctx),
 172                                  0, 0,
 173                                  &name, r, &dest_addr, ctx->event_ctx);
 174         if (!NT_STATUS_IS_OK(status)) {
 175                 libnet_r->out.error_string = NULL;
 176                 talloc_free(tmp_ctx);
 177                 return status;
 178         }
 179
 180         /* Resolve the site name and AD DN's. */
 181         r->in.dest_address = dest_addr;
 182         r->in.netbios_name = libnet_r->in.netbios_name;
 183         r->in.domain_dn_str = libnet_r->out.domain_dn_str;
 184         r->in.cldap_port = lpcfg_cldap_port(ctx->lp_ctx);
 185
 186         status = libnet_FindSite(tmp_ctx, ctx, r);
 187         if (!NT_STATUS_IS_OK(status)) {
 188                 libnet_r->out.error_string =
 189                         talloc_steal(libnet_r, r->out.error_string);
 190                 talloc_free(tmp_ctx);
 191                 return status;
 192         }
 193
 194         config_dn_str = r->out.config_dn_str;
 195         server_dn_str = r->out.server_dn_str;
 196
 197         /*
 198          Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
 199         */
 200         msg = ldb_msg_new(tmp_ctx);
 201         if (!msg) {
 202                 libnet_r->out.error_string = NULL;
 203                 talloc_free(tmp_ctx);
 204                 return NT_STATUS_NO_MEMORY;
 205         }
 206
 207         rtn = ldb_msg_add_string(msg, "objectClass", "server");
 208         if (rtn != LDB_SUCCESS) {
 209                 libnet_r->out.error_string = NULL;
 210                 talloc_free(tmp_ctx);
 211                 return NT_STATUS_NO_MEMORY;
 212         }
 213         rtn = ldb_msg_add_string(msg, "systemFlags", "50000000");
 214         if (rtn != LDB_SUCCESS) {
 215                 libnet_r->out.error_string = NULL;
 216                 talloc_free(tmp_ctx);
 217                 return NT_STATUS_NO_MEMORY;
 218         }
 219         rtn = ldb_msg_add_string(msg, "serverReference", libnet_r->out.account_dn_str);
 220         if (rtn != LDB_SUCCESS) {
 221                 libnet_r->out.error_string = NULL;
 222                 talloc_free(tmp_ctx);
 223                 return NT_STATUS_NO_MEMORY;
 224         }
 225
 226         server_dn = ldb_dn_new(tmp_ctx, remote_ldb, server_dn_str);
 227         if ( ! ldb_dn_validate(server_dn)) {
 228                 libnet_r->out.error_string = talloc_asprintf(libnet_r,
 229                                         "Invalid server dn: %s",
 230                                         server_dn_str);
 231                 talloc_free(tmp_ctx);
 232                 return NT_STATUS_UNSUCCESSFUL;
 233         }
 234
 235         msg->dn = server_dn;
 236
 237         rtn = ldb_add(remote_ldb, msg);
 238         if (rtn == LDB_ERR_ENTRY_ALREADY_EXISTS) {
 239                 unsigned int i;
 240
 241                 /* make a 'modify' msg, and only for serverReference */
 242                 msg = ldb_msg_new(tmp_ctx);
 243                 if (!msg) {
 244                         libnet_r->out.error_string = NULL;
 245                         talloc_free(tmp_ctx);
 246                         return NT_STATUS_NO_MEMORY;
 247                 }
 248                 msg->dn = server_dn;
 249
 250                 rtn = ldb_msg_add_string(msg, "serverReference",libnet_r->out.account_dn_str);
 251                 if (rtn != LDB_SUCCESS) {
 252                         libnet_r->out.error_string = NULL;
 253                         talloc_free(tmp_ctx);
 254                         return NT_STATUS_NO_MEMORY;
 255                 }
 256
 257                 /* mark all the message elements (should be just one)
 258                    as LDB_FLAG_MOD_REPLACE */
 259                 for (i=0;i<msg->num_elements;i++) {
 260                         msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 261                 }
 262
 263                 rtn = ldb_modify(remote_ldb, msg);
 264                 if (rtn != LDB_SUCCESS) {
 265                         libnet_r->out.error_string
 266                                 = talloc_asprintf(libnet_r,
 267                                                   "Failed to modify server entry %s: %s: %d",
 268                                                   server_dn_str,
 269                                                   ldb_errstring(remote_ldb), rtn);
 270                         talloc_free(tmp_ctx);
 271                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 272                 }
 273         } else if (rtn != LDB_SUCCESS) {
 274                 libnet_r->out.error_string
 275                         = talloc_asprintf(libnet_r,
 276                                 "Failed to add server entry %s: %s: %d",
 277                                 server_dn_str, ldb_errstring(remote_ldb),
 278                                 rtn);
 279                 talloc_free(tmp_ctx);
 280                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 281         }
 282         DEBUG(0, ("We still need to perform a DsAddEntry() so that we can create the CN=NTDS Settings container.\n"));
 283
 284         /* Store the server DN in libnet_r */
 285         libnet_r->out.server_dn_str = server_dn_str;
 286         talloc_steal(libnet_r, server_dn_str);
 287
 288         talloc_free(tmp_ctx);
 289         return NT_STATUS_OK;
 290 }