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[tprouty/samba.git] / source / nsswitch / winbindd_group.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    Winbind daemon for ntdom nss module
5
6    Copyright (C) Tim Potter 2000
7    Copyright (C) Jeremy Allison 2001.
8    
9    This program is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 2 of the License, or
12    (at your option) any later version.
13    
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18    
19    You should have received a copy of the GNU General Public License
20    along with this program; if not, write to the Free Software
21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include "winbindd.h"
25
26 #undef DBGC_CLASS
27 #define DBGC_CLASS DBGC_WINBIND
28
29 /***************************************************************
30  Empty static struct for negative caching.
31 ****************************************************************/
32
33 /* Fill a grent structure from various other information */
34
35 static BOOL fill_grent(struct winbindd_gr *gr, const char *dom_name, 
36                        const char *gr_name, gid_t unix_gid)
37 {
38         fstring full_group_name;
39         /* Fill in uid/gid */
40         fill_domain_username(full_group_name, dom_name, gr_name);
41
42         gr->gr_gid = unix_gid;
43     
44         /* Group name and password */
45     
46         safe_strcpy(gr->gr_name, full_group_name, sizeof(gr->gr_name) - 1);
47         safe_strcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd) - 1);
48
49         return True;
50 }
51
52 /* Fill in the group membership field of a NT group given by group_rid */
53
54 static BOOL fill_grent_mem(struct winbindd_domain *domain,
55                            uint32 group_rid, 
56                            enum SID_NAME_USE group_name_type, 
57                            int *num_gr_mem, char **gr_mem, int *gr_mem_len)
58 {
59         uint32 *rid_mem = NULL, num_names = 0;
60         uint32 *name_types = NULL;
61         int buf_len, buf_ndx, i;
62         char **names = NULL, *buf;
63         BOOL result = False;
64         TALLOC_CTX *mem_ctx;
65         NTSTATUS status;
66
67         if (!(mem_ctx = talloc_init_named("fill_grent_mem(%s)", domain->name)))
68                 return False;
69
70         /* Initialise group membership information */
71         
72         DEBUG(10, ("group %s rid 0x%x\n", domain ? domain->name : "NULL", 
73                    group_rid));
74
75         *num_gr_mem = 0;
76         
77         if (group_name_type != SID_NAME_DOM_GRP) {
78                 DEBUG(1, ("rid %d in domain %s isn't a domain group\n", 
79                           group_rid, domain->name));
80                 goto done;
81         }
82
83         /* Lookup group members */
84         status = domain->methods->lookup_groupmem(domain, mem_ctx, group_rid, &num_names, 
85                                                   &rid_mem, &names, &name_types);
86         if (!NT_STATUS_IS_OK(status)) {
87                 DEBUG(1, ("could not lookup membership for group rid %d in domain %s (error: %s)\n", 
88                           group_rid, domain->name, nt_errstr(status)));
89
90                 goto done;
91         }
92
93         DEBUG(10, ("looked up %d names\n", num_names));
94
95         if (DEBUGLEVEL >= 10) {
96                 for (i = 0; i < num_names; i++)
97                         DEBUG(10, ("\t%20s %x %d\n", names[i], rid_mem[i],
98                                    name_types[i]));
99         }
100
101         /* Add members to list */
102
103         buf = NULL;
104         buf_len = buf_ndx = 0;
105
106  again:
107
108         for (i = 0; i < num_names; i++) {
109                 char *the_name;
110                 fstring name;
111                 int len;
112                         
113                 the_name = names[i];
114
115                 DEBUG(10, ("processing name %s\n", the_name));
116
117                 /* FIXME: need to cope with groups within groups.  These
118                    occur in Universal groups on a Windows 2000 native mode
119                    server. */
120
121                 if (name_types[i] != SID_NAME_USER) {
122                         DEBUG(3, ("name %s isn't a domain user\n", the_name));
123                         continue;
124                 }
125
126                 /* Don't bother with machine accounts */
127                 
128                 if (the_name[strlen(the_name) - 1] == '$') {
129                         DEBUG(10, ("%s is machine account\n", the_name));
130                         continue;
131                 }
132
133                 /* Append domain name */
134
135                 fill_domain_username(name, domain->name, the_name);
136
137                 len = strlen(name);
138                 
139                 /* Add to list or calculate buffer length */
140
141                 if (!buf) {
142                         buf_len += len + 1; /* List is comma separated */
143                         (*num_gr_mem)++;
144                         DEBUG(10, ("buf_len + %d = %d\n", len + 1, buf_len));
145                 } else {
146                         DEBUG(10, ("appending %s at ndx %d\n", name, len));
147                         safe_strcpy(&buf[buf_ndx], name, len);
148                         buf_ndx += len;
149                         buf[buf_ndx] = ',';
150                         buf_ndx++;
151                 }
152         }
153
154         /* Allocate buffer */
155
156         if (!buf && buf_len != 0) {
157                 if (!(buf = malloc(buf_len))) {
158                         DEBUG(1, ("out of memory\n"));
159                         result = False;
160                         goto done;
161                 }
162                 memset(buf, 0, buf_len);
163                 goto again;
164         }
165
166         if (buf && buf_ndx > 0) {
167                 buf[buf_ndx - 1] = '\0';
168         }
169
170         *gr_mem = buf;
171         *gr_mem_len = buf_len;
172
173         DEBUG(10, ("num_mem = %d, len = %d, mem = %s\n", *num_gr_mem, 
174                    buf_len, *num_gr_mem ? buf : "NULL")); 
175         result = True;
176
177 done:
178
179         talloc_destroy(mem_ctx);
180         
181         DEBUG(10, ("fill_grent_mem returning %d\n", result));
182
183         return result;
184 }
185
186 /* Return a group structure from a group name */
187
188 enum winbindd_result winbindd_getgrnam(struct winbindd_cli_state *state)
189 {
190         DOM_SID group_sid;
191         struct winbindd_domain *domain;
192         enum SID_NAME_USE name_type;
193         uint32 group_rid;
194         fstring name_domain, name_group;
195         char *tmp, *gr_mem;
196         gid_t gid;
197         int gr_mem_len;
198         
199         /* Ensure null termination */
200         state->request.data.groupname[sizeof(state->request.data.groupname)-1]='\0';
201
202         DEBUG(3, ("[%5d]: getgrnam %s\n", state->pid,
203                   state->request.data.groupname));
204
205         /* Parse domain and groupname */
206         
207         memset(name_group, 0, sizeof(fstring));
208
209         tmp = state->request.data.groupname;
210         if (!parse_domain_user(tmp, name_domain, name_group))
211                 return WINBINDD_ERROR;
212
213         /* Get info for the domain */
214
215         if ((domain = find_domain_from_name(name_domain)) == NULL) {
216                 DEBUG(0, ("could not get domain sid for domain %s\n",
217                           name_domain));
218                 return WINBINDD_ERROR;
219         }
220
221         /* Get rid and name type from name */
222         
223         if (!winbindd_lookup_sid_by_name(domain, name_group, &group_sid, 
224                                          &name_type)) {
225                 DEBUG(1, ("group %s in domain %s does not exist\n", 
226                           name_group, name_domain));
227                 return WINBINDD_ERROR;
228         }
229
230         if ((name_type != SID_NAME_ALIAS) && (name_type != SID_NAME_DOM_GRP)) {
231                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n", 
232                           name_group, name_type));
233                 return WINBINDD_ERROR;
234         }
235
236         /* Fill in group structure */
237         if (!sid_peek_check_rid(&domain->sid, &group_sid, &group_rid))
238                 return WINBINDD_ERROR;
239
240         if (!winbindd_idmap_get_gid_from_sid(&group_sid, &gid)) {
241                 DEBUG(1, ("error converting unix gid to sid\n"));
242                 return WINBINDD_ERROR;
243         }
244
245         if (!fill_grent(&state->response.data.gr, name_domain,
246                         name_group, gid) ||
247             !fill_grent_mem(domain, group_rid, name_type,
248                             &state->response.data.gr.num_gr_mem,
249                             &gr_mem, &gr_mem_len)) {
250                 return WINBINDD_ERROR;
251         }
252
253         /* Group membership lives at start of extra data */
254
255         state->response.data.gr.gr_mem_ofs = 0;
256
257         state->response.length += gr_mem_len;
258         state->response.extra_data = gr_mem;
259
260         return WINBINDD_OK;
261 }
262
263 /* Return a group structure from a gid number */
264
265 enum winbindd_result winbindd_getgrgid(struct winbindd_cli_state *state)
266 {
267         struct winbindd_domain *domain;
268         DOM_SID group_sid;
269         enum SID_NAME_USE name_type;
270         fstring dom_name;
271         fstring group_name;
272         uint32 group_rid;
273         int gr_mem_len;
274         char *gr_mem;
275
276         DEBUG(3, ("[%5d]: getgrgid %d\n", state->pid, 
277                   state->request.data.gid));
278
279         /* Bug out if the gid isn't in the winbind range */
280
281         if ((state->request.data.gid < server_state.gid_low) ||
282             (state->request.data.gid > server_state.gid_high))
283                 return WINBINDD_ERROR;
284
285         /* Get rid from gid */
286
287         if (!winbindd_idmap_get_rid_from_gid(state->request.data.gid, 
288                                              &group_rid, &domain)) {
289                 DEBUG(1, ("could not convert gid %d to rid\n", 
290                           state->request.data.gid));
291                 return WINBINDD_ERROR;
292         }
293
294         /* Get sid from gid */
295
296         sid_copy(&group_sid, &domain->sid);
297         sid_append_rid(&group_sid, group_rid);
298
299         if (!winbindd_lookup_name_by_sid(&group_sid, dom_name, group_name, &name_type)) {
300                 DEBUG(1, ("could not lookup sid\n"));
301                 return WINBINDD_ERROR;
302         }
303
304         if (!((name_type == SID_NAME_ALIAS) || 
305               (name_type == SID_NAME_DOM_GRP))) {
306                 DEBUG(1, ("name '%s' is not a local or domain group: %d\n", 
307                           group_name, name_type));
308                 return WINBINDD_ERROR;
309         }
310
311         /* Fill in group structure */
312
313         if (!fill_grent(&state->response.data.gr, dom_name, group_name, 
314                         state->request.data.gid) ||
315             !fill_grent_mem(domain, group_rid, name_type,
316                             &state->response.data.gr.num_gr_mem,
317                             &gr_mem, &gr_mem_len))
318                 return WINBINDD_ERROR;
319
320         /* Group membership lives at start of extra data */
321
322         state->response.data.gr.gr_mem_ofs = 0;
323
324         state->response.length += gr_mem_len;
325         state->response.extra_data = gr_mem;
326
327         return WINBINDD_OK;
328 }
329
330 /*
331  * set/get/endgrent functions
332  */
333
334 /* "Rewind" file pointer for group database enumeration */
335
336 enum winbindd_result winbindd_setgrent(struct winbindd_cli_state *state)
337 {
338         struct winbindd_domain *domain;
339
340         DEBUG(3, ("[%5d]: setgrent\n", state->pid));
341
342         /* Check user has enabled this */
343
344         if (!lp_winbind_enum_groups())
345                 return WINBINDD_ERROR;
346
347         /* Free old static data if it exists */
348         
349         if (state->getgrent_state != NULL) {
350                 free_getent_state(state->getgrent_state);
351                 state->getgrent_state = NULL;
352         }
353         
354         /* Create sam pipes for each domain we know about */
355         
356         for (domain = domain_list(); domain != NULL; domain = domain->next) {
357                 struct getent_state *domain_state;
358                 
359                 /* Skip domains other than WINBINDD_DOMAIN environment 
360                    variable */
361                 
362                 if ((strcmp(state->request.domain, "") != 0) &&
363                     !check_domain_env(state->request.domain, domain->name))
364                         continue;
365                 
366                 /* Create a state record for this domain */
367                 
368                 if ((domain_state = (struct getent_state *)
369                      malloc(sizeof(struct getent_state))) == NULL) {
370                         DEBUG(1, ("winbindd_setgrent: malloc failed for domain_state!\n"));
371                         return WINBINDD_ERROR;
372                 }
373                 
374                 ZERO_STRUCTP(domain_state);
375                 
376                 fstrcpy(domain_state->domain_name, domain->name);
377
378                 /* Add to list of open domains */
379                 
380                 DLIST_ADD(state->getgrent_state, domain_state);
381         }
382         
383         return WINBINDD_OK;
384 }
385
386 /* Close file pointer to ntdom group database */
387
388 enum winbindd_result winbindd_endgrent(struct winbindd_cli_state *state)
389 {
390         DEBUG(3, ("[%5d]: endgrent\n", state->pid));
391
392         free_getent_state(state->getgrent_state);
393         state->getgrent_state = NULL;
394         
395         return WINBINDD_OK;
396 }
397
398 /* Get the list of domain groups and domain aliases for a domain.  We fill in
399    the sam_entries and num_sam_entries fields with domain group information.  
400    The dispinfo_ndx field is incremented to the index of the next group to 
401    fetch. Return True if some groups were returned, False otherwise. */
402
403 #define MAX_FETCH_SAM_ENTRIES 100
404
405 static BOOL get_sam_group_entries(struct getent_state *ent)
406 {
407         NTSTATUS status;
408         uint32 num_entries;
409         struct acct_info *name_list = NULL;
410         TALLOC_CTX *mem_ctx;
411         BOOL result = False;
412         struct acct_info *sam_grp_entries = NULL;
413         struct winbindd_domain *domain;
414         
415         if (ent->got_sam_entries)
416                 return False;
417
418         if (!(mem_ctx = talloc_init_named("get_sam_group_entries(%s)",
419                                           ent->domain_name))) {
420                 DEBUG(1, ("get_sam_group_entries: could not create talloc context!\n")); 
421                 return False;
422         }
423                 
424         /* Free any existing group info */
425
426         SAFE_FREE(ent->sam_entries);
427         ent->num_sam_entries = 0;
428         ent->got_sam_entries = True;
429
430         /* Enumerate domain groups */
431
432         num_entries = 0;
433
434         if (!(domain = find_domain_from_name(ent->domain_name))) {
435                 DEBUG(3, ("no such domain %s in get_sam_group_entries\n", ent->domain_name));
436                 goto done;
437         }
438
439         status = domain->methods->enum_dom_groups(domain,
440                                                   mem_ctx, 
441                                                   &num_entries,
442                                                   &sam_grp_entries);
443         
444         if (!NT_STATUS_IS_OK(status)) {
445                 DEBUG(3, ("get_sam_group_entries: could not enumerate domain groups! Error: %s", nt_errstr(status)));
446                 result = False;
447                 goto done;
448         }
449
450         /* Copy entries into return buffer */
451
452         if (num_entries) {
453                 name_list = malloc(sizeof(struct acct_info) * num_entries);
454                 memcpy(name_list, sam_grp_entries, 
455                        num_entries * sizeof(struct acct_info));
456         }
457         
458         ent->num_sam_entries = num_entries;
459                 
460         /* Fill in remaining fields */
461
462         ent->sam_entries = name_list;
463         ent->sam_entry_index = 0;
464
465         result = (ent->num_sam_entries > 0);
466
467  done:
468         talloc_destroy(mem_ctx);
469
470         return result;
471 }
472
473 /* Fetch next group entry from ntdom database */
474
475 #define MAX_GETGRENT_GROUPS 500
476
477 enum winbindd_result winbindd_getgrent(struct winbindd_cli_state *state)
478 {
479         struct getent_state *ent;
480         struct winbindd_gr *group_list = NULL;
481         int num_groups, group_list_ndx = 0, i, gr_mem_list_len = 0;
482         char *new_extra_data, *gr_mem_list = NULL;
483
484         DEBUG(3, ("[%5d]: getgrent\n", state->pid));
485
486         /* Check user has enabled this */
487
488         if (!lp_winbind_enum_groups())
489                 return WINBINDD_ERROR;
490
491         num_groups = MIN(MAX_GETGRENT_GROUPS, state->request.data.num_entries);
492
493         if ((state->response.extra_data = 
494              malloc(num_groups * sizeof(struct winbindd_gr))) == NULL)
495                 return WINBINDD_ERROR;
496
497         state->response.data.num_entries = 0;
498
499         group_list = (struct winbindd_gr *)state->response.extra_data;
500
501         if (!(ent = state->getgrent_state))
502                 return WINBINDD_ERROR;
503
504         /* Start sending back groups */
505
506         for (i = 0; i < num_groups; i++) {
507                 struct acct_info *name_list = NULL;
508                 fstring domain_group_name;
509                 uint32 result;
510                 gid_t group_gid;
511                 int gr_mem_len;
512                 char *gr_mem, *new_gr_mem_list;
513                 
514                 /* Do we need to fetch another chunk of groups? */
515
516         tryagain:
517
518                 DEBUG(10, ("entry_index = %d, num_entries = %d\n",
519                            ent->sam_entry_index, ent->num_sam_entries));
520
521                 if (ent->num_sam_entries == ent->sam_entry_index) {
522
523                         while(ent && !get_sam_group_entries(ent)) {
524                                 struct getent_state *next_ent;
525
526                                 DEBUG(10, ("freeing state info for domain %s\n", ent->domain_name)); 
527
528                                 /* Free state information for this domain */
529
530                                 SAFE_FREE(ent->sam_entries);
531
532                                 next_ent = ent->next;
533                                 DLIST_REMOVE(state->getgrent_state, ent);
534                                 
535                                 SAFE_FREE(ent);
536                                 ent = next_ent;
537                         }
538
539                         /* No more domains */
540
541                         if (!ent) 
542                                 break;
543                 }
544                 
545                 name_list = ent->sam_entries;
546                 
547                 /* Lookup group info */
548                 
549                 if (!winbindd_idmap_get_gid_from_rid(
550                         ent->domain_name,
551                         name_list[ent->sam_entry_index].rid,
552                         &group_gid)) {
553                         
554                         DEBUG(1, ("could not look up gid for group %s\n", 
555                                   name_list[ent->sam_entry_index].acct_name));
556
557                         ent->sam_entry_index++;
558                         goto tryagain;
559                 }
560
561                 DEBUG(10, ("got gid %d for group %x\n", group_gid,
562                            name_list[ent->sam_entry_index].rid));
563                 
564                 /* Fill in group entry */
565
566                 fill_domain_username(domain_group_name, ent->domain_name, 
567                          name_list[ent->sam_entry_index].acct_name);
568
569                 result = fill_grent(&group_list[group_list_ndx], 
570                                     ent->domain_name,
571                                     name_list[ent->sam_entry_index].acct_name,
572                                     group_gid);
573
574                 /* Fill in group membership entry */
575
576                 if (result) {
577                         struct winbindd_domain *domain;
578
579                         if (!(domain = 
580                               find_domain_from_name(ent->domain_name))) {
581                                 DEBUG(3, ("No such domain %s in winbindd_getgrent\n", ent->domain_name));
582                                 result = False;
583                                 goto done;
584                         }
585
586                         group_list[group_list_ndx].num_gr_mem = 0;
587                         gr_mem = NULL;
588                         gr_mem_len = 0;
589                         
590                         /* Get group membership */                      
591                         if (state->request.cmd == WINBINDD_GETGRLST) {
592                                 result = True;
593                         } else {
594                                 result = fill_grent_mem(
595                                         domain,
596                                         name_list[ent->sam_entry_index].rid,
597                                         SID_NAME_DOM_GRP,
598                                         &group_list[group_list_ndx].num_gr_mem, 
599                                         &gr_mem, &gr_mem_len);
600                         }
601                 }
602
603                 if (result) {
604                         /* Append to group membership list */
605                         new_gr_mem_list = Realloc(
606                                 gr_mem_list,
607                                 gr_mem_list_len + gr_mem_len);
608
609                         if (!new_gr_mem_list && (group_list[group_list_ndx].num_gr_mem != 0)) {
610                                 DEBUG(0, ("out of memory\n"));
611                                 SAFE_FREE(gr_mem_list);
612                                 gr_mem_list_len = 0;
613                                 break;
614                         }
615
616                         DEBUG(10, ("list_len = %d, mem_len = %d\n",
617                                    gr_mem_list_len, gr_mem_len));
618
619                         gr_mem_list = new_gr_mem_list;
620
621                         memcpy(&gr_mem_list[gr_mem_list_len], gr_mem,
622                                gr_mem_len);
623
624                         SAFE_FREE(gr_mem);
625
626                         group_list[group_list_ndx].gr_mem_ofs = 
627                                 gr_mem_list_len;
628
629                         gr_mem_list_len += gr_mem_len;
630                 }
631
632                 ent->sam_entry_index++;
633                 
634                 /* Add group to return list */
635                 
636                 if (result) {
637
638                         DEBUG(10, ("adding group num_entries = %d\n",
639                                    state->response.data.num_entries));
640
641                         group_list_ndx++;
642                         state->response.data.num_entries++;
643                         
644                         state->response.length +=
645                                 sizeof(struct winbindd_gr);
646                         
647                 } else {
648                         DEBUG(0, ("could not lookup domain group %s\n", 
649                                   domain_group_name));
650                 }
651         }
652
653         /* Copy the list of group memberships to the end of the extra data */
654
655         if (group_list_ndx == 0)
656                 goto done;
657
658         new_extra_data = Realloc(
659                 state->response.extra_data,
660                 group_list_ndx * sizeof(struct winbindd_gr) + gr_mem_list_len);
661
662         if (!new_extra_data) {
663                 DEBUG(0, ("out of memory\n"));
664                 group_list_ndx = 0;
665                 SAFE_FREE(state->response.extra_data);
666                 SAFE_FREE(gr_mem_list);
667
668                 return WINBINDD_ERROR;
669         }
670
671         state->response.extra_data = new_extra_data;
672
673         memcpy(&((char *)state->response.extra_data)
674                [group_list_ndx * sizeof(struct winbindd_gr)], 
675                gr_mem_list, gr_mem_list_len);
676
677         SAFE_FREE(gr_mem_list);
678
679         state->response.length += gr_mem_list_len;
680
681         DEBUG(10, ("returning %d groups, length = %d\n",
682                    group_list_ndx, gr_mem_list_len));
683
684         /* Out of domains */
685
686  done:
687
688         return (group_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
689 }
690
691 /* List domain groups without mapping to unix ids */
692
693 enum winbindd_result winbindd_list_groups(struct winbindd_cli_state *state)
694 {
695         uint32 total_entries = 0;
696         struct winbindd_domain *domain;
697         char *extra_data = NULL;
698         char *ted = NULL;
699         int extra_data_len = 0, i;
700
701         DEBUG(3, ("[%5d]: list groups\n", state->pid));
702
703         /* Enumerate over trusted domains */
704
705         for (domain = domain_list(); domain; domain = domain->next) {
706                 struct getent_state groups;
707
708                 ZERO_STRUCT(groups);
709
710                 /* Skip domains other than WINBINDD_DOMAIN environment
711                    variable */ 
712                 if ((strcmp(state->request.domain, "") != 0) &&
713                     !check_domain_env(state->request.domain, domain->name))
714                         continue;
715
716                 /* Get list of sam groups */
717                 ZERO_STRUCT(groups);
718                 fstrcpy(groups.domain_name, domain->name);
719
720                 get_sam_group_entries(&groups);
721                         
722                 if (groups.num_sam_entries == 0) {
723                         /* this domain is empty or in an error state */
724                         continue;
725                 }
726
727                 /* keep track the of the total number of groups seen so 
728                    far over all domains */
729                 total_entries += groups.num_sam_entries;
730                 
731                 /* Allocate some memory for extra data.  Note that we limit
732                    account names to sizeof(fstring) = 128 characters.  */               
733                 ted = Realloc(extra_data, sizeof(fstring) * total_entries);
734  
735                 if (!ted) {
736                         DEBUG(0,("failed to enlarge buffer!\n"));
737                         SAFE_FREE(extra_data);
738                         return WINBINDD_ERROR;
739                 } else
740                         extra_data = ted;
741
742                 /* Pack group list into extra data fields */
743                 for (i = 0; i < groups.num_sam_entries; i++) {
744                         char *group_name = ((struct acct_info *)
745                                             groups.sam_entries)[i].acct_name; 
746                         fstring name;
747
748                         fill_domain_username(name, domain->name, group_name);
749                         /* Append to extra data */                      
750                         memcpy(&extra_data[extra_data_len], name, 
751                                strlen(name));
752                         extra_data_len += strlen(name);
753                         extra_data[extra_data_len++] = ',';
754                 }
755
756                 free(groups.sam_entries);
757         }
758
759         /* Assign extra_data fields in response structure */
760         if (extra_data) {
761                 extra_data[extra_data_len - 1] = '\0';
762                 state->response.extra_data = extra_data;
763                 state->response.length += extra_data_len;
764         }
765
766         /* No domains may have responded but that's still OK so don't
767            return an error. */
768
769         return WINBINDD_OK;
770 }
771
772 /* Get user supplementary groups.  This is much quicker than trying to
773    invert the groups database. */
774
775 enum winbindd_result winbindd_getgroups(struct winbindd_cli_state *state)
776 {
777         fstring name_domain, name_user;
778         DOM_SID user_sid;
779         enum SID_NAME_USE name_type;
780         uint32 user_rid, num_groups, num_gids;
781         NTSTATUS status;
782         uint32 *user_gids;
783         struct winbindd_domain *domain;
784         enum winbindd_result result = WINBINDD_ERROR;
785         gid_t *gid_list;
786         int i;
787         TALLOC_CTX *mem_ctx;
788         
789         /* Ensure null termination */
790         state->request.data.username[sizeof(state->request.data.username)-1]='\0';
791
792         DEBUG(3, ("[%5d]: getgroups %s\n", state->pid,
793                   state->request.data.username));
794
795         if (!(mem_ctx = talloc_init_named("winbindd_getgroups(%s)",
796                                           state->request.data.username)))
797                 return WINBINDD_ERROR;
798
799         /* Parse domain and username */
800
801         if (!parse_domain_user(state->request.data.username, name_domain, 
802                           name_user))
803                 goto done;
804
805         /* Get info for the domain */
806         
807         if ((domain = find_domain_from_name(name_domain)) == NULL) {
808                 DEBUG(0, ("could not find domain entry for domain %s\n", 
809                           name_domain));
810                 goto done;
811         }
812
813         /* Get rid and name type from name.  The following costs 1 packet */
814
815         if (!winbindd_lookup_sid_by_name(domain, name_user, &user_sid, 
816                                          &name_type)) {
817                 DEBUG(1, ("user '%s' does not exist\n", name_user));
818                 goto done;
819         }
820
821         if (name_type != SID_NAME_USER) {
822                 DEBUG(1, ("name '%s' is not a user name: %d\n", 
823                           name_user, name_type));
824                 goto done;
825         }
826
827         sid_split_rid(&user_sid, &user_rid);
828
829         status = domain->methods->lookup_usergroups(domain, mem_ctx, user_rid, &num_groups, &user_gids);
830         if (!NT_STATUS_IS_OK(status)) goto done;
831
832         /* Copy data back to client */
833
834         num_gids = 0;
835         gid_list = malloc(sizeof(gid_t) * num_groups);
836
837         if (state->response.extra_data)
838                 goto done;
839
840         for (i = 0; i < num_groups; i++) {
841                 if (!winbindd_idmap_get_gid_from_rid(domain->name, 
842                                                      user_gids[i], 
843                                                      &gid_list[num_gids])) {
844
845                         DEBUG(1, ("unable to convert group rid %d to gid\n", 
846                                   user_gids[i]));
847                         continue;
848                 }
849                         
850                 num_gids++;
851         }
852
853         state->response.data.num_entries = num_gids;
854         state->response.extra_data = gid_list;
855         state->response.length += num_gids * sizeof(gid_t);
856
857         result = WINBINDD_OK;
858
859  done:
860
861         talloc_destroy(mem_ctx);
862
863         return result;
864 }