source/nsswitch/winbindd_user.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon - user related functions
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jeremy Allison 2001.
   8    Copyright (C) Gerald (Jerry) Carter 2003.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_WINBIND
  30
  31 extern userdom_struct current_user_info;
  32
  33 /* Fill a pwent structure with information we have obtained */
  34
  35 static BOOL winbindd_fill_pwent(char *dom_name, char *user_name,
  36                                 DOM_SID *user_sid, DOM_SID *group_sid,
  37                                 char *full_name, struct winbindd_pw *pw)
  38 {
  39         fstring output_username;
  40         char *homedir;
  41         char *shell;
  42         fstring sid_string;
  43
  44         if (!pw || !dom_name || !user_name)
  45                 return False;
  46
  47         /* Resolve the uid number */
  48
  49         if (!NT_STATUS_IS_OK(idmap_sid_to_uid(user_sid, &pw->pw_uid, 0))) {
  50                 DEBUG(1, ("error getting user id for sid %s\n", sid_to_string(sid_string, user_sid)));
  51                 return False;
  52         }
  53
  54         /* Resolve the gid number */
  55
  56         if (!NT_STATUS_IS_OK(idmap_sid_to_gid(group_sid, &pw->pw_gid, 0))) {
  57                 DEBUG(1, ("error getting group id for sid %s\n", sid_to_string(sid_string, group_sid)));
  58                 return False;
  59         }
  60
  61         strlower_m(user_name);
  62
  63         /* Username */
  64
  65         fill_domain_username(output_username, dom_name, user_name);
  66
  67         safe_strcpy(pw->pw_name, output_username, sizeof(pw->pw_name) - 1);
  68
  69         /* Full name (gecos) */
  70
  71         safe_strcpy(pw->pw_gecos, full_name, sizeof(pw->pw_gecos) - 1);
  72
  73         /* Home directory and shell - use template config parameters.  The
  74            defaults are /tmp for the home directory and /bin/false for
  75            shell. */
  76
  77         /* The substitution of %U and %D in the 'template homedir' is done
  78            by alloc_sub_specified() below. */
  79
  80         fstrcpy(current_user_info.domain, dom_name);
  81
  82         homedir = alloc_sub_specified(lp_template_homedir(), user_name, dom_name, pw->pw_uid, pw->pw_gid);
  83
  84         if (!homedir)
  85                 return False;
  86
  87         safe_strcpy(pw->pw_dir, homedir, sizeof(pw->pw_dir) - 1);
  88
  89         SAFE_FREE(homedir);
  90
  91         shell = alloc_sub_specified(lp_template_shell(), user_name, dom_name, pw->pw_uid, pw->pw_gid);
  92
  93         if (!shell)
  94                 return False;
  95
  96         safe_strcpy(pw->pw_shell, shell,
  97                     sizeof(pw->pw_shell) - 1);
  98
  99         SAFE_FREE(shell);
 100
 101         /* Password - set to "x" as we can't generate anything useful here.
 102            Authentication can be done using the pam_winbind module. */
 103
 104         safe_strcpy(pw->pw_passwd, "x", sizeof(pw->pw_passwd) - 1);
 105
 106         return True;
 107 }
 108
 109 /* Wrapper for domain->methods->query_user, only on the parent->child pipe */
 110
 111 enum winbindd_result winbindd_dual_userinfo(struct winbindd_domain *domain,
 112                                             struct winbindd_cli_state *state)
 113 {
 114         DOM_SID sid;
 115         WINBIND_USERINFO user_info;
 116         NTSTATUS status;
 117
 118         /* Ensure null termination */
 119         state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
 120
 121         DEBUG(3, ("[%5lu]: lookupsid %s\n", (unsigned long)state->pid,
 122                   state->request.data.sid));
 123
 124         if (!string_to_sid(&sid, state->request.data.sid)) {
 125                 DEBUG(5, ("%s not a SID\n", state->request.data.sid));
 126                 return WINBINDD_ERROR;
 127         }
 128
 129         status = domain->methods->query_user(domain, state->mem_ctx,
 130                                              &sid, &user_info);
 131         if (!NT_STATUS_IS_OK(status)) {
 132                 DEBUG(1, ("error getting user info for sid %s\n",
 133                           sid_string_static(&sid)));
 134                 return WINBINDD_ERROR;
 135         }
 136
 137         fstrcpy(state->response.data.user_info.acct_name, user_info.acct_name);
 138         fstrcpy(state->response.data.user_info.full_name, user_info.full_name);
 139         if (!sid_peek_check_rid(&domain->sid, &user_info.group_sid,
 140                                 &state->response.data.user_info.group_rid)) {
 141                 DEBUG(1, ("Could not extract group rid out of %s\n",
 142                           sid_string_static(&sid)));
 143                 return WINBINDD_ERROR;
 144         }
 145
 146         return WINBINDD_OK;
 147 }
 148
 149 struct getpwsid_state {
 150         struct winbindd_cli_state *state;
 151         struct winbindd_domain *domain;
 152         char *username;
 153         char *fullname;
 154         DOM_SID user_sid;
 155         uid_t uid;
 156         DOM_SID group_sid;
 157         gid_t gid;
 158 };
 159
 160 static void getpwsid_queryuser_recv(void *private, BOOL success,
 161                                     const char *acct_name,
 162                                     const char *full_name, uint32 group_rid);
 163 static void getpwsid_sid2uid_recv(void *private, BOOL success, uid_t uid);
 164 static void getpwsid_sid2gid_recv(void *private, BOOL success, gid_t gid);
 165
 166 static void winbindd_getpwsid(struct winbindd_cli_state *state,
 167                               const DOM_SID *sid)
 168 {
 169         struct getpwsid_state *s;
 170
 171         s = TALLOC_P(state->mem_ctx, struct getpwsid_state);
 172         if (s == NULL) {
 173                 DEBUG(0, ("talloc failed\n"));
 174                 goto error;
 175         }
 176
 177         s->state = state;
 178         s->domain = find_domain_from_sid_noinit(sid);
 179         if (s->domain == NULL) {
 180                 DEBUG(3, ("Could not find domain for sid %s\n",
 181                           sid_string_static(sid)));
 182                 goto error;
 183         }
 184
 185         sid_copy(&s->user_sid, sid);
 186
 187         query_user_async(s->state->mem_ctx, s->domain, sid,
 188                          getpwsid_queryuser_recv, s);
 189         return;
 190
 191  error:
 192         request_error(state);
 193 }
 194
 195 static void getpwsid_queryuser_recv(void *private, BOOL success,
 196                                     const char *acct_name,
 197                                     const char *full_name, uint32 group_rid)
 198 {
 199         struct getpwsid_state *s =
 200                 talloc_get_type_abort(private, struct getpwsid_state);
 201
 202         if (!success) {
 203                 DEBUG(5, ("Could not query user %s\\%s\n", s->domain->name,
 204                           s->username));
 205                 request_error(s->state);
 206                 return;
 207         }
 208
 209         s->username = talloc_strdup(s->state->mem_ctx, acct_name);
 210         s->fullname = talloc_strdup(s->state->mem_ctx, full_name);
 211         sid_copy(&s->group_sid, &s->domain->sid);
 212         sid_append_rid(&s->group_sid, group_rid);
 213
 214         winbindd_sid2uid_async(s->state->mem_ctx, &s->user_sid,
 215                                getpwsid_sid2uid_recv, s);
 216 }
 217
 218 static void getpwsid_sid2uid_recv(void *private, BOOL success, uid_t uid)
 219 {
 220         struct getpwsid_state *s =
 221                 talloc_get_type_abort(private, struct getpwsid_state);
 222
 223         if (!success) {
 224                 DEBUG(5, ("Could not query user's %s\\%s uid\n",
 225                           s->domain->name, s->username));
 226                 request_error(s->state);
 227                 return;
 228         }
 229
 230         s->uid = uid;
 231         winbindd_sid2gid_async(s->state->mem_ctx, &s->group_sid,
 232                                getpwsid_sid2gid_recv, s);
 233 }
 234
 235 static void getpwsid_sid2gid_recv(void *private, BOOL success, gid_t gid)
 236 {
 237         struct getpwsid_state *s =
 238                 talloc_get_type_abort(private, struct getpwsid_state);
 239         struct winbindd_pw *pw;
 240         fstring output_username;
 241         char *homedir;
 242         char *shell;
 243
 244         if (!success) {
 245                 DEBUG(5, ("Could not query user's %s\\%s\n gid",
 246                           s->domain->name, s->username));
 247                 goto failed;
 248         }
 249
 250         s->gid = gid;
 251
 252         pw = &s->state->response.data.pw;
 253         pw->pw_uid = s->uid;
 254         pw->pw_gid = s->gid;
 255         fill_domain_username(output_username, s->domain->name, s->username);
 256         safe_strcpy(pw->pw_name, output_username, sizeof(pw->pw_name) - 1);
 257         safe_strcpy(pw->pw_gecos, s->fullname, sizeof(pw->pw_gecos) - 1);
 258
 259         /* Home directory and shell - use template config parameters.  The
 260            defaults are /tmp for the home directory and /bin/false for
 261            shell. */
 262
 263         /* The substitution of %U and %D in the 'template homedir' is done
 264            by alloc_sub_specified() below. */
 265
 266         fstrcpy(current_user_info.domain, s->domain->name);
 267
 268         homedir = alloc_sub_specified(lp_template_homedir(), s->username,
 269                                       s->domain->name, pw->pw_uid, pw->pw_gid);
 270         if (homedir == NULL) {
 271                 DEBUG(5, ("Could not compose homedir\n"));
 272                 goto failed;
 273         }
 274         safe_strcpy(pw->pw_dir, homedir, sizeof(pw->pw_dir) - 1);
 275         SAFE_FREE(homedir);
 276
 277         shell = alloc_sub_specified(lp_template_shell(), s->username,
 278                                     s->domain->name, pw->pw_uid, pw->pw_gid);
 279         if (shell == NULL) {
 280                 DEBUG(5, ("Could not compose shell\n"));
 281                 goto failed;
 282         }
 283         safe_strcpy(pw->pw_shell, shell, sizeof(pw->pw_shell) - 1);
 284         SAFE_FREE(shell);
 285
 286         /* Password - set to "x" as we can't generate anything useful here.
 287            Authentication can be done using the pam_winbind module. */
 288
 289         safe_strcpy(pw->pw_passwd, "x", sizeof(pw->pw_passwd) - 1);
 290
 291         request_ok(s->state);
 292         return;
 293
 294  failed:
 295         request_error(s->state);
 296 }
 297
 298 /* Return a password structure from a username.  */
 299
 300 static void getpwnam_name2sid_recv(void *private, BOOL success,
 301                                    const DOM_SID *sid, enum SID_NAME_USE type);
 302
 303 void winbindd_getpwnam(struct winbindd_cli_state *state)
 304 {
 305         struct winbindd_domain *domain;
 306         fstring domname, username;
 307
 308         /* Ensure null termination */
 309         state->request.data.username[sizeof(state->request.data.username)-1]='\0';
 310
 311         DEBUG(3, ("[%5lu]: getpwnam %s\n", (unsigned long)state->pid,
 312                   state->request.data.username));
 313
 314         if (!parse_domain_user(state->request.data.username, domname,
 315                                username)) {
 316                 DEBUG(0, ("Could not parse domain user: %s\n",
 317                           state->request.data.username));
 318                 request_error(state);
 319                 return;
 320         }
 321
 322         /* Get info for the domain */
 323
 324         domain = find_domain_from_name(domname);
 325
 326         if (domain == NULL) {
 327                 DEBUG(7, ("could not find domain entry for domain %s\n",
 328                           domname));
 329                 request_error(state);
 330                 return;
 331         }
 332
 333         if ( strequal(domname, lp_workgroup()) && lp_winbind_trusted_domains_only() ) {
 334                 DEBUG(7,("winbindd_getpwnam: My domain -- rejecting getpwnam() for %s\\%s.\n",
 335                         domname, username));
 336                 request_error(state);
 337                 return;
 338         }
 339
 340         /* Get rid and name type from name.  The following costs 1 packet */
 341
 342         winbindd_lookupname_async(state->mem_ctx, domname, username,
 343                                   getpwnam_name2sid_recv, state);
 344 }
 345
 346 static void getpwnam_name2sid_recv(void *private, BOOL success,
 347                                    const DOM_SID *sid, enum SID_NAME_USE type)
 348 {
 349         struct winbindd_cli_state *state = private;
 350
 351         if (!success) {
 352                 DEBUG(5, ("Could not lookup name for user %s\n",
 353                           state->request.data.username));
 354                 request_error(state);
 355                 return;
 356         }
 357
 358         if ((type != SID_NAME_USER) && (type != SID_NAME_COMPUTER)) {
 359                 DEBUG(5, ("%s is not a user\n", state->request.data.username));
 360                 request_error(state);
 361                 return;
 362         }
 363
 364         winbindd_getpwsid(state, sid);
 365 }
 366
 367 /* Return a password structure given a uid number */
 368
 369 void winbindd_getpwuid(struct winbindd_cli_state *state)
 370 {
 371         DOM_SID user_sid;
 372         NTSTATUS status;
 373
 374         /* Bug out if the uid isn't in the winbind range */
 375
 376         if ((state->request.data.uid < server_state.uid_low ) ||
 377             (state->request.data.uid > server_state.uid_high)) {
 378                 request_error(state);
 379                 return;
 380         }
 381
 382         DEBUG(3, ("[%5lu]: getpwuid %lu\n", (unsigned long)state->pid,
 383                   (unsigned long)state->request.data.uid));
 384
 385         status = idmap_uid_to_sid(&user_sid, state->request.data.uid,
 386                                   ID_QUERY_ONLY | ID_CACHE_ONLY);
 387
 388         if (!NT_STATUS_IS_OK(status)) {
 389                 DEBUG(5, ("Could not find SID for uid %lu\n",
 390                           (unsigned long)state->request.data.uid));
 391                 request_error(state);
 392                 return;
 393         }
 394
 395         winbindd_getpwsid(state, &user_sid);
 396 }
 397
 398 /*
 399  * set/get/endpwent functions
 400  */
 401
 402 /* Rewind file pointer for ntdom passwd database */
 403
 404 static BOOL winbindd_setpwent_internal(struct winbindd_cli_state *state)
 405 {
 406         struct winbindd_domain *domain;
 407
 408         DEBUG(3, ("[%5lu]: setpwent\n", (unsigned long)state->pid));
 409
 410         /* Check user has enabled this */
 411
 412         if (!lp_winbind_enum_users()) {
 413                 return False;
 414         }
 415
 416         /* Free old static data if it exists */
 417
 418         if (state->getpwent_state != NULL) {
 419                 free_getent_state(state->getpwent_state);
 420                 state->getpwent_state = NULL;
 421         }
 422
 423 #if 0   /* JERRY */
 424         /* add any local users we have */
 425
 426         if ( (domain_state = (struct getent_state *)malloc(sizeof(struct getent_state))) == NULL )
 427                 return False;
 428
 429         ZERO_STRUCTP(domain_state);
 430
 431         /* Add to list of open domains */
 432
 433         DLIST_ADD(state->getpwent_state, domain_state);
 434 #endif
 435
 436         /* Create sam pipes for each domain we know about */
 437
 438         for(domain = domain_list(); domain != NULL; domain = domain->next) {
 439                 struct getent_state *domain_state;
 440
 441
 442                 /* don't add our domaina if we are a PDC or if we
 443                    are a member of a Samba domain */
 444
 445                 if ( (IS_DC || lp_winbind_trusted_domains_only())
 446                         && strequal(domain->name, lp_workgroup()) )
 447                 {
 448                         continue;
 449                 }
 450
 451                 /* Create a state record for this domain */
 452
 453                 if ((domain_state = SMB_MALLOC_P(struct getent_state)) == NULL) {
 454                         DEBUG(0, ("malloc failed\n"));
 455                         return False;
 456                 }
 457
 458                 ZERO_STRUCTP(domain_state);
 459
 460                 fstrcpy(domain_state->domain_name, domain->name);
 461
 462                 /* Add to list of open domains */
 463
 464                 DLIST_ADD(state->getpwent_state, domain_state);
 465         }
 466
 467         state->getpwent_initialized = True;
 468         return True;
 469 }
 470
 471 void winbindd_setpwent(struct winbindd_cli_state *state)
 472 {
 473         if (winbindd_setpwent_internal(state)) {
 474                 request_ok(state);
 475         } else {
 476                 request_error(state);
 477         }
 478 }
 479
 480 /* Close file pointer to ntdom passwd database */
 481
 482 void winbindd_endpwent(struct winbindd_cli_state *state)
 483 {
 484         DEBUG(3, ("[%5lu]: endpwent\n", (unsigned long)state->pid));
 485
 486         free_getent_state(state->getpwent_state);
 487         state->getpwent_initialized = False;
 488         state->getpwent_state = NULL;
 489         request_ok(state);
 490 }
 491
 492 /* Get partial list of domain users for a domain.  We fill in the sam_entries,
 493    and num_sam_entries fields with domain user information.  The dispinfo_ndx
 494    field is incremented to the index of the next user to fetch.  Return True if
 495    some users were returned, False otherwise. */
 496
 497 static BOOL get_sam_user_entries(struct getent_state *ent, TALLOC_CTX *mem_ctx)
 498 {
 499         NTSTATUS status;
 500         uint32 num_entries;
 501         WINBIND_USERINFO *info;
 502         struct getpwent_user *name_list = NULL;
 503         BOOL result = False;
 504         struct winbindd_domain *domain;
 505         struct winbindd_methods *methods;
 506         unsigned int i;
 507
 508         if (ent->num_sam_entries)
 509                 return False;
 510
 511         if (!(domain = find_domain_from_name(ent->domain_name))) {
 512                 DEBUG(3, ("no such domain %s in get_sam_user_entries\n",
 513                           ent->domain_name));
 514                 return False;
 515         }
 516
 517         methods = domain->methods;
 518
 519         /* Free any existing user info */
 520
 521         SAFE_FREE(ent->sam_entries);
 522         ent->num_sam_entries = 0;
 523
 524         /* Call query_user_list to get a list of usernames and user rids */
 525
 526         num_entries = 0;
 527
 528         status = methods->query_user_list(domain, mem_ctx, &num_entries,
 529                                           &info);
 530
 531         if (num_entries) {
 532                 struct getpwent_user *tnl;
 533
 534                 tnl = SMB_REALLOC_ARRAY(name_list, struct getpwent_user, ent->num_sam_entries + num_entries);
 535
 536                 if (!tnl) {
 537                         DEBUG(0,("get_sam_user_entries realloc failed.\n"));
 538                         SAFE_FREE(name_list);
 539                         goto done;
 540                 } else
 541                         name_list = tnl;
 542         }
 543
 544         for (i = 0; i < num_entries; i++) {
 545                 /* Store account name and gecos */
 546                 if (!info[i].acct_name) {
 547                         fstrcpy(name_list[ent->num_sam_entries + i].name, "");
 548                 } else {
 549                         fstrcpy(name_list[ent->num_sam_entries + i].name,
 550                                 info[i].acct_name);
 551                 }
 552                 if (!info[i].full_name) {
 553                         fstrcpy(name_list[ent->num_sam_entries + i].gecos, "");
 554                 } else {
 555                         fstrcpy(name_list[ent->num_sam_entries + i].gecos,
 556                                 info[i].full_name);
 557                 }
 558
 559                 /* User and group ids */
 560                 sid_copy(&name_list[ent->num_sam_entries+i].user_sid,
 561                          &info[i].user_sid);
 562                 sid_copy(&name_list[ent->num_sam_entries+i].group_sid,
 563                          &info[i].group_sid);
 564         }
 565
 566         ent->num_sam_entries += num_entries;
 567
 568         /* Fill in remaining fields */
 569
 570         ent->sam_entries = name_list;
 571         ent->sam_entry_index = 0;
 572         result = ent->num_sam_entries > 0;
 573
 574  done:
 575
 576         return result;
 577 }
 578
 579 /* Fetch next passwd entry from ntdom database */
 580
 581 #define MAX_GETPWENT_USERS 500
 582
 583 void winbindd_getpwent(struct winbindd_cli_state *state)
 584 {
 585         struct getent_state *ent;
 586         struct winbindd_pw *user_list;
 587         int num_users, user_list_ndx = 0, i;
 588
 589         DEBUG(3, ("[%5lu]: getpwent\n", (unsigned long)state->pid));
 590
 591         /* Check user has enabled this */
 592
 593         if (!lp_winbind_enum_users()) {
 594                 request_error(state);
 595                 return;
 596         }
 597
 598         /* Allocate space for returning a chunk of users */
 599
 600         num_users = MIN(MAX_GETPWENT_USERS, state->request.data.num_entries);
 601
 602         if ((state->response.extra_data = SMB_MALLOC_ARRAY(struct winbindd_pw, num_users)) == NULL) {
 603                 request_error(state);
 604                 return;
 605         }
 606
 607         memset(state->response.extra_data, 0, num_users *
 608                sizeof(struct winbindd_pw));
 609
 610         user_list = (struct winbindd_pw *)state->response.extra_data;
 611
 612         if (!state->getpwent_initialized)
 613                 winbindd_setpwent_internal(state);
 614
 615         if (!(ent = state->getpwent_state)) {
 616                 request_error(state);
 617                 return;
 618         }
 619
 620         /* Start sending back users */
 621
 622         for (i = 0; i < num_users; i++) {
 623                 struct getpwent_user *name_list = NULL;
 624                 uint32 result;
 625
 626                 /* Do we need to fetch another chunk of users? */
 627
 628                 if (ent->num_sam_entries == ent->sam_entry_index) {
 629
 630                         while(ent &&
 631                               !get_sam_user_entries(ent, state->mem_ctx)) {
 632                                 struct getent_state *next_ent;
 633
 634                                 /* Free state information for this domain */
 635
 636                                 SAFE_FREE(ent->sam_entries);
 637
 638                                 next_ent = ent->next;
 639                                 DLIST_REMOVE(state->getpwent_state, ent);
 640
 641                                 SAFE_FREE(ent);
 642                                 ent = next_ent;
 643                         }
 644
 645                         /* No more domains */
 646
 647                         if (!ent)
 648                                 break;
 649                 }
 650
 651                 name_list = ent->sam_entries;
 652
 653                 /* Lookup user info */
 654
 655                 result = winbindd_fill_pwent(
 656                         ent->domain_name,
 657                         name_list[ent->sam_entry_index].name,
 658                         &name_list[ent->sam_entry_index].user_sid,
 659                         &name_list[ent->sam_entry_index].group_sid,
 660                         name_list[ent->sam_entry_index].gecos,
 661                         &user_list[user_list_ndx]);
 662
 663                 ent->sam_entry_index++;
 664
 665                 /* Add user to return list */
 666
 667                 if (result) {
 668
 669                         user_list_ndx++;
 670                         state->response.data.num_entries++;
 671                         state->response.length +=
 672                                 sizeof(struct winbindd_pw);
 673
 674                 } else
 675                         DEBUG(1, ("could not lookup domain user %s\n",
 676                                   name_list[ent->sam_entry_index].name));
 677         }
 678
 679         /* Out of domains */
 680
 681         if (user_list_ndx > 0)
 682                 request_ok(state);
 683         else
 684                 request_error(state);
 685 }
 686
 687 /* List domain users without mapping to unix ids */
 688
 689 void winbindd_list_users(struct winbindd_cli_state *state)
 690 {
 691         struct winbindd_domain *domain;
 692         WINBIND_USERINFO *info;
 693         const char *which_domain;
 694         uint32 num_entries = 0, total_entries = 0;
 695         char *ted, *extra_data = NULL;
 696         int extra_data_len = 0;
 697         enum winbindd_result rv = WINBINDD_ERROR;
 698
 699         DEBUG(3, ("[%5lu]: list users\n", (unsigned long)state->pid));
 700
 701         /* Ensure null termination */
 702         state->request.domain_name[sizeof(state->request.domain_name)-1]='\0';
 703         which_domain = state->request.domain_name;
 704
 705         /* Enumerate over trusted domains */
 706
 707         for (domain = domain_list(); domain; domain = domain->next) {
 708                 NTSTATUS status;
 709                 struct winbindd_methods *methods;
 710                 unsigned int i;
 711
 712                 /* if we have a domain name restricting the request and this
 713                    one in the list doesn't match, then just bypass the remainder
 714                    of the loop */
 715
 716                 if ( *which_domain && !strequal(which_domain, domain->name) )
 717                         continue;
 718
 719                 methods = domain->methods;
 720
 721                 /* Query display info */
 722                 status = methods->query_user_list(domain, state->mem_ctx,
 723                                                   &num_entries, &info);
 724
 725                 if (num_entries == 0)
 726                         continue;
 727
 728                 /* Allocate some memory for extra data */
 729                 total_entries += num_entries;
 730
 731                 ted = SMB_REALLOC(extra_data, sizeof(fstring) * total_entries);
 732
 733                 if (!ted) {
 734                         DEBUG(0,("failed to enlarge buffer!\n"));
 735                         SAFE_FREE(extra_data);
 736                         goto done;
 737                 } else
 738                         extra_data = ted;
 739
 740                 /* Pack user list into extra data fields */
 741
 742                 for (i = 0; i < num_entries; i++) {
 743                         fstring acct_name, name;
 744
 745                         if (!info[i].acct_name) {
 746                                 fstrcpy(acct_name, "");
 747                         } else {
 748                                 fstrcpy(acct_name, info[i].acct_name);
 749                         }
 750
 751                         fill_domain_username(name, domain->name, acct_name);
 752
 753                                 /* Append to extra data */
 754                         memcpy(&extra_data[extra_data_len], name,
 755                                strlen(name));
 756                         extra_data_len += strlen(name);
 757                         extra_data[extra_data_len++] = ',';
 758                 }
 759         }
 760
 761         /* Assign extra_data fields in response structure */
 762
 763         if (extra_data) {
 764                 extra_data[extra_data_len - 1] = '\0';
 765                 state->response.extra_data = extra_data;
 766                 state->response.length += extra_data_len;
 767         }
 768
 769         /* No domains responded but that's still OK so don't return an
 770            error. */
 771
 772         rv = WINBINDD_OK;
 773
 774  done:
 775
 776         if (rv == WINBINDD_OK)
 777                 request_ok(state);
 778         else
 779                 request_error(state);
 780 }