source4/libnet/libnet_unbecome_dc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Stefan Metzmacher <metze@samba.org> 2006
   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/composite/composite.h"
  23 #include "libcli/cldap/cldap.h"
  24 #include "lib/ldb/include/ldb.h"
  25 #include "lib/ldb/include/ldb_errors.h"
  26 #include "lib/ldb_wrap.h"
  27 #include "dsdb/samdb/samdb.h"
  28 #include "dsdb/common/flags.h"
  29 #include "librpc/gen_ndr/ndr_drsuapi_c.h"
  30 #include "param/param.h"
  31
  32 /*****************************************************************************
  33  * Windows 2003 (w2k3) does the following steps when changing the server role
  34  * from domain controller back to domain member
  35  *
  36  * We mostly do the same.
  37  *****************************************************************************/
  38
  39 /*
  40  * lookup DC:
  41  * - using nbt name<1C> request and a samlogon mailslot request
  42  * or
  43  * - using a DNS SRV _ldap._tcp.dc._msdcs. request and a CLDAP netlogon request
  44  *
  45  * see: unbecomeDC_send_cldap() and unbecomeDC_recv_cldap()
  46  */
  47
  48 /*
  49  * Open 1st LDAP connection to the DC using admin credentials
  50  *
  51  * see: unbecomeDC_ldap_connect()
  52  */
  53
  54 /*
  55  * LDAP search 1st LDAP connection:
  56  *
  57  * see: unbecomeDC_ldap_rootdse()
  58  *
  59  * Request:
  60  *      basedn: ""
  61  *      scope:  base
  62  *      filter: (objectClass=*)
  63  *      attrs:  defaultNamingContext
  64  *              configurationNamingContext
  65  * Result:
  66  *      ""
  67  *              defaultNamingContext:   <domain_partition>
  68  *              configurationNamingContext:CN=Configuration,<domain_partition>
  69  */
  70
  71 /*
  72  * LDAP search 1st LDAP connection:
  73  *
  74  * see: unbecomeDC_ldap_computer_object()
  75  *
  76  * Request:
  77  *      basedn: <domain_partition>
  78  *      scope:  sub
  79  *      filter: (&(|(objectClass=user)(objectClass=computer))(sAMAccountName=<new_dc_account_name>))
  80  *      attrs:  distinguishedName
  81  *              userAccountControl
  82  * Result:
  83  *      CN=<new_dc_netbios_name>,CN=Domain Controllers,<domain_partition>
  84  *              distinguishedName:      CN=<new_dc_netbios_name>,CN=Domain Controllers,<domain_partition>
  85  *              userAccoountControl:    532480 <0x82000>
  86  */
  87
  88 /*
  89  * LDAP search 1st LDAP connection:
  90  *
  91  * see: unbecomeDC_ldap_modify_computer()
  92  *
  93  * Request:
  94  *      basedn: CN=<new_dc_netbios_name>,CN=Computers,<domain_partition>
  95  *      scope:  base
  96  *      filter: (objectClass=*)
  97  *      attrs:  userAccountControl
  98  * Result:
  99  *      CN=<new_dc_netbios_name>,CN=Computers,<domain_partition>
 100  *              userAccoountControl:    532480 <0x82000>
 101  */
 102
 103 /*
 104  * LDAP modify 1st LDAP connection:
 105  *
 106  * see: unbecomeDC_ldap_modify_computer()
 107  *
 108  * Request (replace):
 109  *      CN=<new_dc_netbios_name>,CN=Computers,<domain_partition>
 110  *      userAccoountControl:    4096 <0x1000>
 111  * Result:
 112  *      <success>
 113  */
 114
 115 /*
 116  * LDAP search 1st LDAP connection:
 117  *
 118  * see: unbecomeDC_ldap_move_computer()
 119  *
 120  * Request:
 121  *      basedn: <WKGUID=aa312825768811d1aded00c04fd8d5cd,<domain_partition>>
 122  *      scope:  base
 123  *      filter: (objectClass=*)
 124  *      attrs:  1.1
 125  * Result:
 126  *      CN=Computers,<domain_partition>
 127  */
 128
 129 /*
 130  * LDAP search 1st LDAP connection:
 131  *
 132  * not implemented because it doesn't give any new information
 133  *
 134  * Request:
 135  *      basedn: CN=Computers,<domain_partition>
 136  *      scope:  base
 137  *      filter: (objectClass=*)
 138  *      attrs:  distinguishedName
 139  * Result:
 140  *      CN=Computers,<domain_partition>
 141  *              distinguishedName:      CN=Computers,<domain_partition>
 142  */
 143
 144 /*
 145  * LDAP modifyRDN 1st LDAP connection:
 146  *
 147  * see: unbecomeDC_ldap_move_computer()
 148  *
 149  * Request:
 150  *      entry:          CN=<new_dc_netbios_name>,CN=Domain Controllers,<domain_partition>
 151  *      newrdn:         CN=<new_dc_netbios_name>
 152  *      deleteoldrdn:   TRUE
 153  *      newparent:      CN=Computers,<domain_partition>
 154  * Result:
 155  *      <success>
 156  */
 157
 158 /*
 159  * LDAP unbind on the 1st LDAP connection
 160  *
 161  * not implemented, because it's not needed...
 162  */
 163
 164 /*
 165  * Open 1st DRSUAPI connection to the DC using admin credentials
 166  * DsBind with DRSUAPI_DS_BIND_GUID ("e24d201a-4fd6-11d1-a3da-0000f875ae0d")
 167  *
 168  * see: unbecomeDC_drsuapi_connect_send(), unbecomeDC_drsuapi_connect_recv(),
 169  *      unbecomeDC_drsuapi_bind_send() and unbecomeDC_drsuapi_bind_recv()
 170  */
 171
 172 /*
 173  * DsRemoveDsServer to remove the
 174  * CN=<machine_name>,CN=Servers,CN=<site_name>,CN=Configuration,<domain_partition>
 175  * and CN=NTDS Settings,CN=<machine_name>,CN=Servers,CN=<site_name>,CN=Configuration,<domain_partition>
 176  * on the 1st DRSUAPI connection
 177  *
 178  * see: unbecomeDC_drsuapi_remove_ds_server_send() and unbecomeDC_drsuapi_remove_ds_server_recv()
 179  */
 180
 181 /*
 182  * DsUnbind on the 1st DRSUAPI connection
 183  *
 184  * not implemented, because it's not needed...
 185  */
 186
 187
 188 struct libnet_UnbecomeDC_state {
 189         struct composite_context *creq;
 190
 191         struct libnet_context *libnet;
 192
 193         struct {
 194                 struct cldap_socket *sock;
 195                 struct cldap_netlogon io;
 196                 struct nbt_cldap_netlogon_5 netlogon5;
 197         } cldap;
 198
 199         struct {
 200                 struct ldb_context *ldb;
 201         } ldap;
 202
 203         struct {
 204                 struct dcerpc_binding *binding;
 205                 struct dcerpc_pipe *pipe;
 206                 struct drsuapi_DsBind bind_r;
 207                 struct GUID bind_guid;
 208                 struct drsuapi_DsBindInfoCtr bind_info_ctr;
 209                 struct drsuapi_DsBindInfo28 local_info28;
 210                 struct drsuapi_DsBindInfo28 remote_info28;
 211                 struct policy_handle bind_handle;
 212                 struct drsuapi_DsRemoveDSServer rm_ds_srv_r;
 213         } drsuapi;
 214
 215         struct {
 216                 /* input */
 217                 const char *dns_name;
 218                 const char *netbios_name;
 219
 220                 /* constructed */
 221                 struct GUID guid;
 222                 const char *dn_str;
 223         } domain;
 224
 225         struct {
 226                 /* constructed */
 227                 const char *config_dn_str;
 228         } forest;
 229
 230         struct {
 231                 /* input */
 232                 const char *address;
 233
 234                 /* constructed */
 235                 const char *dns_name;
 236                 const char *netbios_name;
 237                 const char *site_name;
 238         } source_dsa;
 239
 240         struct {
 241                 /* input */
 242                 const char *netbios_name;
 243
 244                 /* constructed */
 245                 const char *dns_name;
 246                 const char *site_name;
 247                 const char *computer_dn_str;
 248                 const char *server_dn_str;
 249                 uint32_t user_account_control;
 250         } dest_dsa;
 251 };
 252
 253 static void unbecomeDC_recv_cldap(struct cldap_request *req);
 254
 255 static void unbecomeDC_send_cldap(struct libnet_UnbecomeDC_state *s)
 256 {
 257         struct composite_context *c = s->creq;
 258         struct cldap_request *req;
 259
 260         s->cldap.io.in.dest_address     = s->source_dsa.address;
 261         s->cldap.io.in.dest_port        = lp_cldap_port(s->libnet->lp_ctx);
 262         s->cldap.io.in.realm            = s->domain.dns_name;
 263         s->cldap.io.in.host             = s->dest_dsa.netbios_name;
 264         s->cldap.io.in.user             = NULL;
 265         s->cldap.io.in.domain_guid      = NULL;
 266         s->cldap.io.in.domain_sid       = NULL;
 267         s->cldap.io.in.acct_control     = -1;
 268         s->cldap.io.in.version          = 6;
 269
 270         s->cldap.sock = cldap_socket_init(s, s->libnet->event_ctx,
 271                                           lp_iconv_convenience(s->libnet->lp_ctx));
 272         if (composite_nomem(s->cldap.sock, c)) return;
 273
 274         req = cldap_netlogon_send(s->cldap.sock, &s->cldap.io);
 275         if (composite_nomem(req, c)) return;
 276         req->async.fn           = unbecomeDC_recv_cldap;
 277         req->async.private      = s;
 278 }
 279
 280 static void unbecomeDC_connect_ldap(struct libnet_UnbecomeDC_state *s);
 281
 282 static void unbecomeDC_recv_cldap(struct cldap_request *req)
 283 {
 284         struct libnet_UnbecomeDC_state *s = talloc_get_type(req->async.private,
 285                                             struct libnet_UnbecomeDC_state);
 286         struct composite_context *c = s->creq;
 287
 288         c->status = cldap_netlogon_recv(req, s, &s->cldap.io);
 289         if (!composite_is_ok(c)) return;
 290
 291         s->cldap.netlogon5 = s->cldap.io.out.netlogon.logon5;
 292
 293         s->domain.dns_name              = s->cldap.netlogon5.dns_domain;
 294         s->domain.netbios_name          = s->cldap.netlogon5.domain;
 295         s->domain.guid                  = s->cldap.netlogon5.domain_uuid;
 296
 297         s->source_dsa.dns_name          = s->cldap.netlogon5.pdc_dns_name;
 298         s->source_dsa.netbios_name      = s->cldap.netlogon5.pdc_name;
 299         s->source_dsa.site_name         = s->cldap.netlogon5.server_site;
 300
 301         s->dest_dsa.site_name           = s->cldap.netlogon5.client_site;
 302
 303         unbecomeDC_connect_ldap(s);
 304 }
 305
 306 static NTSTATUS unbecomeDC_ldap_connect(struct libnet_UnbecomeDC_state *s)
 307 {
 308         char *url;
 309
 310         url = talloc_asprintf(s, "ldap://%s/", s->source_dsa.dns_name);
 311         NT_STATUS_HAVE_NO_MEMORY(url);
 312
 313         s->ldap.ldb = ldb_wrap_connect(s, s->libnet->lp_ctx, url,
 314                                        NULL,
 315                                        s->libnet->cred,
 316                                        0, NULL);
 317         talloc_free(url);
 318         if (s->ldap.ldb == NULL) {
 319                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 320         }
 321
 322         return NT_STATUS_OK;
 323 }
 324
 325 static NTSTATUS unbecomeDC_ldap_rootdse(struct libnet_UnbecomeDC_state *s)
 326 {
 327         int ret;
 328         struct ldb_result *r;
 329         struct ldb_dn *basedn;
 330         static const char *attrs[] = {
 331                 "defaultNamingContext",
 332                 "configurationNamingContext",
 333                 NULL
 334         };
 335
 336         basedn = ldb_dn_new(s, s->ldap.ldb, NULL);
 337         NT_STATUS_HAVE_NO_MEMORY(basedn);
 338
 339         ret = ldb_search(s->ldap.ldb, basedn, LDB_SCOPE_BASE,
 340                          "(objectClass=*)", attrs, &r);
 341         talloc_free(basedn);
 342         if (ret != LDB_SUCCESS) {
 343                 return NT_STATUS_LDAP(ret);
 344         } else if (r->count != 1) {
 345                 talloc_free(r);
 346                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 347         }
 348         talloc_steal(s, r);
 349
 350         s->domain.dn_str        = ldb_msg_find_attr_as_string(r->msgs[0], "defaultNamingContext", NULL);
 351         if (!s->domain.dn_str) return NT_STATUS_INVALID_NETWORK_RESPONSE;
 352         talloc_steal(s, s->domain.dn_str);
 353
 354         s->forest.config_dn_str = ldb_msg_find_attr_as_string(r->msgs[0], "configurationNamingContext", NULL);
 355         if (!s->forest.config_dn_str) return NT_STATUS_INVALID_NETWORK_RESPONSE;
 356         talloc_steal(s, s->forest.config_dn_str);
 357
 358         s->dest_dsa.server_dn_str = talloc_asprintf(s, "CN=%s,CN=Servers,CN=%s,CN=Sites,%s",
 359                                                     s->dest_dsa.netbios_name,
 360                                                     s->dest_dsa.site_name,
 361                                                     s->forest.config_dn_str);
 362         NT_STATUS_HAVE_NO_MEMORY(s->dest_dsa.server_dn_str);
 363
 364         talloc_free(r);
 365         return NT_STATUS_OK;
 366 }
 367
 368 static NTSTATUS unbecomeDC_ldap_computer_object(struct libnet_UnbecomeDC_state *s)
 369 {
 370         int ret;
 371         struct ldb_result *r;
 372         struct ldb_dn *basedn;
 373         char *filter;
 374         static const char *attrs[] = {
 375                 "distinguishedName",
 376                 "userAccountControl",
 377                 NULL
 378         };
 379
 380         basedn = ldb_dn_new(s, s->ldap.ldb, s->domain.dn_str);
 381         NT_STATUS_HAVE_NO_MEMORY(basedn);
 382
 383         filter = talloc_asprintf(basedn, "(&(|(objectClass=user)(objectClass=computer))(sAMAccountName=%s$))",
 384                                  s->dest_dsa.netbios_name);
 385         NT_STATUS_HAVE_NO_MEMORY(filter);
 386
 387         ret = ldb_search(s->ldap.ldb, basedn, LDB_SCOPE_SUBTREE,
 388                          filter, attrs, &r);
 389         talloc_free(basedn);
 390         if (ret != LDB_SUCCESS) {
 391                 return NT_STATUS_LDAP(ret);
 392         } else if (r->count != 1) {
 393                 talloc_free(r);
 394                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 395         }
 396
 397         s->dest_dsa.computer_dn_str     = samdb_result_string(r->msgs[0], "distinguishedName", NULL);
 398         if (!s->dest_dsa.computer_dn_str) return NT_STATUS_INVALID_NETWORK_RESPONSE;
 399         talloc_steal(s, s->dest_dsa.computer_dn_str);
 400
 401         s->dest_dsa.user_account_control = samdb_result_uint(r->msgs[0], "userAccountControl", 0);
 402
 403         talloc_free(r);
 404         return NT_STATUS_OK;
 405 }
 406
 407 static NTSTATUS unbecomeDC_ldap_modify_computer(struct libnet_UnbecomeDC_state *s)
 408 {
 409         int ret;
 410         struct ldb_message *msg;
 411         uint32_t user_account_control = UF_WORKSTATION_TRUST_ACCOUNT;
 412         uint32_t i;
 413
 414         /* as the value is already as we want it to be, we're done */
 415         if (s->dest_dsa.user_account_control == user_account_control) {
 416                 return NT_STATUS_OK;
 417         }
 418
 419         /* make a 'modify' msg, and only for serverReference */
 420         msg = ldb_msg_new(s);
 421         NT_STATUS_HAVE_NO_MEMORY(msg);
 422         msg->dn = ldb_dn_new(msg, s->ldap.ldb, s->dest_dsa.computer_dn_str);
 423         NT_STATUS_HAVE_NO_MEMORY(msg->dn);
 424
 425         ret = ldb_msg_add_fmt(msg, "userAccountControl", "%u", user_account_control);
 426         if (ret != 0) {
 427                 talloc_free(msg);
 428                 return NT_STATUS_NO_MEMORY;
 429         }
 430
 431         /* mark all the message elements (should be just one)
 432            as LDB_FLAG_MOD_REPLACE */
 433         for (i=0;i<msg->num_elements;i++) {
 434                 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 435         }
 436
 437         ret = ldb_modify(s->ldap.ldb, msg);
 438         talloc_free(msg);
 439         if (ret != LDB_SUCCESS) {
 440                 return NT_STATUS_LDAP(ret);
 441         }
 442
 443         s->dest_dsa.user_account_control = user_account_control;
 444
 445         return NT_STATUS_OK;
 446 }
 447
 448 static NTSTATUS unbecomeDC_ldap_move_computer(struct libnet_UnbecomeDC_state *s)
 449 {
 450         int ret;
 451         struct ldb_result *r;
 452         struct ldb_dn *basedn;
 453         struct ldb_dn *old_dn;
 454         struct ldb_dn *new_dn;
 455         static const char *_1_1_attrs[] = {
 456                 "1.1",
 457                 NULL
 458         };
 459
 460         basedn = ldb_dn_new_fmt(s, s->ldap.ldb, "<WKGUID=aa312825768811d1aded00c04fd8d5cd,%s>",
 461                                 s->domain.dn_str);
 462         NT_STATUS_HAVE_NO_MEMORY(basedn);
 463
 464         ret = ldb_search(s->ldap.ldb, basedn, LDB_SCOPE_BASE,
 465                          "(objectClass=*)", _1_1_attrs, &r);
 466         talloc_free(basedn);
 467         if (ret != LDB_SUCCESS) {
 468                 return NT_STATUS_LDAP(ret);
 469         } else if (r->count != 1) {
 470                 talloc_free(r);
 471                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 472         }
 473
 474         old_dn = ldb_dn_new(r, s->ldap.ldb, s->dest_dsa.computer_dn_str);
 475         NT_STATUS_HAVE_NO_MEMORY(old_dn);
 476
 477         new_dn = r->msgs[0]->dn;
 478
 479         if (!ldb_dn_add_child_fmt(new_dn, "CN=%s", s->dest_dsa.netbios_name)) {
 480                 talloc_free(r);
 481                 return NT_STATUS_NO_MEMORY;
 482         }
 483
 484         if (ldb_dn_compare(old_dn, new_dn) == 0) {
 485                 /* we don't need to rename if the old and new dn match */
 486                 talloc_free(r);
 487                 return NT_STATUS_OK;
 488         }
 489
 490         ret = ldb_rename(s->ldap.ldb, old_dn, new_dn);
 491         if (ret != LDB_SUCCESS) {
 492                 talloc_free(r);
 493                 return NT_STATUS_LDAP(ret);
 494         }
 495
 496         s->dest_dsa.computer_dn_str = ldb_dn_alloc_linearized(s, new_dn);
 497         NT_STATUS_HAVE_NO_MEMORY(s->dest_dsa.computer_dn_str);
 498
 499         talloc_free(r);
 500
 501         return NT_STATUS_OK;
 502 }
 503
 504 static void unbecomeDC_drsuapi_connect_send(struct libnet_UnbecomeDC_state *s);
 505
 506 static void unbecomeDC_connect_ldap(struct libnet_UnbecomeDC_state *s)
 507 {
 508         struct composite_context *c = s->creq;
 509
 510         c->status = unbecomeDC_ldap_connect(s);
 511         if (!composite_is_ok(c)) return;
 512
 513         c->status = unbecomeDC_ldap_rootdse(s);
 514         if (!composite_is_ok(c)) return;
 515
 516         c->status = unbecomeDC_ldap_computer_object(s);
 517         if (!composite_is_ok(c)) return;
 518
 519         c->status = unbecomeDC_ldap_modify_computer(s);
 520         if (!composite_is_ok(c)) return;
 521
 522         c->status = unbecomeDC_ldap_move_computer(s);
 523         if (!composite_is_ok(c)) return;
 524
 525         unbecomeDC_drsuapi_connect_send(s);
 526 }
 527
 528 static void unbecomeDC_drsuapi_connect_recv(struct composite_context *creq);
 529
 530 static void unbecomeDC_drsuapi_connect_send(struct libnet_UnbecomeDC_state *s)
 531 {
 532         struct composite_context *c = s->creq;
 533         struct composite_context *creq;
 534         char *binding_str;
 535
 536         binding_str = talloc_asprintf(s, "ncacn_ip_tcp:%s[seal]", s->source_dsa.dns_name);
 537         if (composite_nomem(binding_str, c)) return;
 538
 539         c->status = dcerpc_parse_binding(s, binding_str, &s->drsuapi.binding);
 540         talloc_free(binding_str);
 541         if (!composite_is_ok(c)) return;
 542
 543         creq = dcerpc_pipe_connect_b_send(s, s->drsuapi.binding, &ndr_table_drsuapi,
 544                                           s->libnet->cred, s->libnet->event_ctx,
 545                                           s->libnet->lp_ctx);
 546         composite_continue(c, creq, unbecomeDC_drsuapi_connect_recv, s);
 547 }
 548
 549 static void unbecomeDC_drsuapi_bind_send(struct libnet_UnbecomeDC_state *s);
 550
 551 static void unbecomeDC_drsuapi_connect_recv(struct composite_context *req)
 552 {
 553         struct libnet_UnbecomeDC_state *s = talloc_get_type(req->async.private_data,
 554                                             struct libnet_UnbecomeDC_state);
 555         struct composite_context *c = s->creq;
 556
 557         c->status = dcerpc_pipe_connect_b_recv(req, s, &s->drsuapi.pipe);
 558         if (!composite_is_ok(c)) return;
 559
 560         unbecomeDC_drsuapi_bind_send(s);
 561 }
 562
 563 static void unbecomeDC_drsuapi_bind_recv(struct rpc_request *req);
 564
 565 static void unbecomeDC_drsuapi_bind_send(struct libnet_UnbecomeDC_state *s)
 566 {
 567         struct composite_context *c = s->creq;
 568         struct rpc_request *req;
 569         struct drsuapi_DsBindInfo28 *bind_info28;
 570
 571         GUID_from_string(DRSUAPI_DS_BIND_GUID, &s->drsuapi.bind_guid);
 572
 573         bind_info28                             = &s->drsuapi.local_info28;
 574         bind_info28->supported_extensions       = 0;
 575         bind_info28->site_guid                  = GUID_zero();
 576         bind_info28->u1                         = 508;
 577         bind_info28->repl_epoch                 = 0;
 578
 579         s->drsuapi.bind_info_ctr.length         = 28;
 580         s->drsuapi.bind_info_ctr.info.info28    = *bind_info28;
 581
 582         s->drsuapi.bind_r.in.bind_guid = &s->drsuapi.bind_guid;
 583         s->drsuapi.bind_r.in.bind_info = &s->drsuapi.bind_info_ctr;
 584         s->drsuapi.bind_r.out.bind_handle = &s->drsuapi.bind_handle;
 585
 586         req = dcerpc_drsuapi_DsBind_send(s->drsuapi.pipe, s, &s->drsuapi.bind_r);
 587         composite_continue_rpc(c, req, unbecomeDC_drsuapi_bind_recv, s);
 588 }
 589
 590 static void unbecomeDC_drsuapi_remove_ds_server_send(struct libnet_UnbecomeDC_state *s);
 591
 592 static void unbecomeDC_drsuapi_bind_recv(struct rpc_request *req)
 593 {
 594         struct libnet_UnbecomeDC_state *s = talloc_get_type(req->async.private_data,
 595                                             struct libnet_UnbecomeDC_state);
 596         struct composite_context *c = s->creq;
 597
 598         c->status = dcerpc_ndr_request_recv(req);
 599         if (!composite_is_ok(c)) return;
 600
 601         if (!W_ERROR_IS_OK(s->drsuapi.bind_r.out.result)) {
 602                 composite_error(c, werror_to_ntstatus(s->drsuapi.bind_r.out.result));
 603                 return;
 604         }
 605
 606         ZERO_STRUCT(s->drsuapi.remote_info28);
 607         if (s->drsuapi.bind_r.out.bind_info) {
 608                 switch (s->drsuapi.bind_r.out.bind_info->length) {
 609                 case 24: {
 610                         struct drsuapi_DsBindInfo24 *info24;
 611                         info24 = &s->drsuapi.bind_r.out.bind_info->info.info24;
 612                         s->drsuapi.remote_info28.supported_extensions   = info24->supported_extensions;
 613                         s->drsuapi.remote_info28.site_guid              = info24->site_guid;
 614                         s->drsuapi.remote_info28.u1                     = info24->u1;
 615                         s->drsuapi.remote_info28.repl_epoch             = 0;
 616                         break;
 617                 }
 618                 case 28:
 619                         s->drsuapi.remote_info28 = s->drsuapi.bind_r.out.bind_info->info.info28;
 620                         break;
 621                 }
 622         }
 623
 624         unbecomeDC_drsuapi_remove_ds_server_send(s);
 625 }
 626
 627 static void unbecomeDC_drsuapi_remove_ds_server_recv(struct rpc_request *req);
 628
 629 static void unbecomeDC_drsuapi_remove_ds_server_send(struct libnet_UnbecomeDC_state *s)
 630 {
 631         struct composite_context *c = s->creq;
 632         struct rpc_request *req;
 633         struct drsuapi_DsRemoveDSServer *r = &s->drsuapi.rm_ds_srv_r;
 634
 635         r->in.bind_handle       = &s->drsuapi.bind_handle;
 636         r->in.level             = 1;
 637         r->in.req.req1.server_dn= s->dest_dsa.server_dn_str;
 638         r->in.req.req1.domain_dn= s->domain.dn_str;
 639         r->in.req.req1.unknown  = 0x00000001;
 640
 641         req = dcerpc_drsuapi_DsRemoveDSServer_send(s->drsuapi.pipe, s, r);
 642         composite_continue_rpc(c, req, unbecomeDC_drsuapi_remove_ds_server_recv, s);
 643 }
 644
 645 static void unbecomeDC_drsuapi_remove_ds_server_recv(struct rpc_request *req)
 646 {
 647         struct libnet_UnbecomeDC_state *s = talloc_get_type(req->async.private_data,
 648                                             struct libnet_UnbecomeDC_state);
 649         struct composite_context *c = s->creq;
 650         struct drsuapi_DsRemoveDSServer *r = &s->drsuapi.rm_ds_srv_r;
 651
 652         c->status = dcerpc_ndr_request_recv(req);
 653         if (!composite_is_ok(c)) return;
 654
 655         if (!W_ERROR_IS_OK(r->out.result)) {
 656                 composite_error(c, werror_to_ntstatus(r->out.result));
 657                 return;
 658         }
 659
 660         if (r->out.level != 1) {
 661                 composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE);
 662                 return;
 663         }
 664
 665         if (!W_ERROR_IS_OK(r->out.res.res1.status)) {
 666                 composite_error(c, werror_to_ntstatus(r->out.res.res1.status));
 667                 return;
 668         }
 669
 670         composite_done(c);
 671 }
 672
 673 struct composite_context *libnet_UnbecomeDC_send(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_UnbecomeDC *r)
 674 {
 675         struct composite_context *c;
 676         struct libnet_UnbecomeDC_state *s;
 677         char *tmp_name;
 678
 679         c = composite_create(mem_ctx, ctx->event_ctx);
 680         if (c == NULL) return NULL;
 681
 682         s = talloc_zero(c, struct libnet_UnbecomeDC_state);
 683         if (composite_nomem(s, c)) return c;
 684         c->private_data = s;
 685         s->creq         = c;
 686         s->libnet       = ctx;
 687
 688         /* Domain input */
 689         s->domain.dns_name      = talloc_strdup(s, r->in.domain_dns_name);
 690         if (composite_nomem(s->domain.dns_name, c)) return c;
 691         s->domain.netbios_name  = talloc_strdup(s, r->in.domain_netbios_name);
 692         if (composite_nomem(s->domain.netbios_name, c)) return c;
 693
 694         /* Source DSA input */
 695         s->source_dsa.address   = talloc_strdup(s, r->in.source_dsa_address);
 696         if (composite_nomem(s->source_dsa.address, c)) return c;
 697
 698         /* Destination DSA input */
 699         s->dest_dsa.netbios_name= talloc_strdup(s, r->in.dest_dsa_netbios_name);
 700         if (composite_nomem(s->dest_dsa.netbios_name, c)) return c;
 701
 702         /* Destination DSA dns_name construction */
 703         tmp_name                = strlower_talloc(s, s->dest_dsa.netbios_name);
 704         if (composite_nomem(tmp_name, c)) return c;
 705         s->dest_dsa.dns_name    = talloc_asprintf_append_buffer(tmp_name, ".%s",
 706                                                          s->domain.dns_name);
 707         if (composite_nomem(s->dest_dsa.dns_name, c)) return c;
 708
 709         unbecomeDC_send_cldap(s);
 710         return c;
 711 }
 712
 713 NTSTATUS libnet_UnbecomeDC_recv(struct composite_context *c, TALLOC_CTX *mem_ctx, struct libnet_UnbecomeDC *r)
 714 {
 715         NTSTATUS status;
 716
 717         status = composite_wait(c);
 718
 719         ZERO_STRUCT(r->out);
 720
 721         talloc_free(c);
 722         return status;
 723 }
 724
 725 NTSTATUS libnet_UnbecomeDC(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_UnbecomeDC *r)
 726 {
 727         NTSTATUS status;
 728         struct composite_context *c;
 729         c = libnet_UnbecomeDC_send(ctx, mem_ctx, r);
 730         status = libnet_UnbecomeDC_recv(c, mem_ctx, r);
 731         return status;
 732 }