summaryrefslogtreecommitdiffstats
path: root/src/providers/ipa/ipa_subdomains.c
blob: 98fc69f14d62d74fb82b0f067307362e819aa82c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
/*
    SSSD

    IPA Subdomains Module

    Authors:
        Sumit Bose <sbose@redhat.com>

    Copyright (C) 2011 Red Hat

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "providers/ldap/sdap_async.h"
#include "providers/ipa/ipa_subdomains.h"
#include "providers/ipa/ipa_common.h"
#include <ctype.h>

#define SUBDOMAINS_FILTER "objectclass=ipaNTTrustedDomain"
#define MASTER_DOMAIN_FILTER "objectclass=ipaNTDomainAttrs"
#define RANGE_FILTER "objectclass=ipaIDRange"

#define IPA_CN "cn"
#define IPA_FLATNAME "ipaNTFlatName"
#define IPA_SID "ipaNTSecurityIdentifier"
#define IPA_TRUSTED_DOMAIN_SID "ipaNTTrustedDomainSID"

#define IPA_BASE_ID "ipaBaseID"
#define IPA_ID_RANGE_SIZE "ipaIDRangeSize"
#define IPA_BASE_RID "ipaBaseRID"
#define IPA_SECONDARY_BASE_RID "ipaSecondaryBaseRID"
#define OBJECTCLASS "objectClass"

/* do not refresh more often than every 5 seconds for now */
#define IPA_SUBDOMAIN_REFRESH_LIMIT 5

/* refresh automatically every 4 hours */
#define IPA_SUBDOMAIN_REFRESH_PERIOD (3600 * 4)
#define IPA_SUBDOMAIN_DISABLED_PERIOD 3600

/* the directory domain - realm mappings are written to */
#define IPA_SUBDOMAIN_MAPPING_DIR PUBCONF_PATH"/krb5.include.d"

enum ipa_subdomains_req_type {
    IPA_SUBDOMAINS_MASTER,
    IPA_SUBDOMAINS_SLAVE,
    IPA_SUBDOMAINS_RANGES,

    IPA_SUBDOMAINS_MAX /* Counter */
};

struct ipa_subdomains_req_params {
    const char *filter;
    tevent_req_fn cb;
    const char *attrs[8];
};

struct ipa_subdomains_ctx {
    struct be_ctx *be_ctx;
    struct sdap_id_ctx *sdap_id_ctx;
    struct sdap_search_base **search_bases;
    struct sdap_search_base **master_search_bases;
    struct sdap_search_base **ranges_search_bases;

    time_t last_refreshed;
    struct tevent_timer *timer_event;
    bool configured_explicit;
    time_t disabled_until;
};

struct be_ctx *ipa_get_subdomains_be_ctx(struct be_ctx *be_ctx)
{
    struct ipa_subdomains_ctx *subdom_ctx;

    subdom_ctx = talloc_get_type(be_ctx->bet_info[BET_SUBDOMAINS].pvt_bet_data,
                                 struct ipa_subdomains_ctx);
    if (subdom_ctx == NULL) {
        DEBUG(SSSDBG_TRACE_ALL, ("Subdomains are not configured.\n"));
        return NULL;
    }

    return subdom_ctx->be_ctx;
}

const char *get_flat_name_from_subdomain_name(struct be_ctx *be_ctx,
                                              const char *name)
{
    struct ipa_subdomains_ctx *ctx;
    struct sss_domain_info *dom;

    ctx = talloc_get_type(be_ctx->bet_info[BET_SUBDOMAINS].pvt_bet_data,
                          struct ipa_subdomains_ctx);
    if (ctx == NULL) {
        DEBUG(SSSDBG_TRACE_ALL, ("Subdomains are not configured.\n"));
        return NULL;
    }

    dom = find_subdomain_by_name(ctx->be_ctx->domain, name, true);
    if (dom) {
        return dom->flat_name;
    }

    return NULL;
}

static errno_t ipa_ranges_parse_results(TALLOC_CTX *mem_ctx,
                                        size_t count,
                                        struct sysdb_attrs **reply,
                                        struct range_info ***_range_list)
{
    struct range_info **range_list = NULL;
    const char *value;
    size_t c;
    int ret;

    range_list = talloc_array(mem_ctx, struct range_info *, count + 1);
    if (range_list == NULL) {
        DEBUG(SSSDBG_OP_FAILURE, ("talloc_array failed.\n"));
        return ENOMEM;
    }

    for (c = 0; c < count; c++) {
        range_list[c] = talloc_zero(range_list, struct range_info);
        if (range_list[c] == NULL) {
            DEBUG(SSSDBG_OP_FAILURE, ("talloc_zero failed.\n"));
            ret = ENOMEM;
            goto done;
        }

        ret = sysdb_attrs_get_string(reply[c], IPA_CN, &value);
        if (ret != EOK) {
            DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
            goto done;
        }
        range_list[c]->name = talloc_strdup(range_list[c], value);
        if (range_list[c]->name == NULL) {
            DEBUG(SSSDBG_OP_FAILURE, ("talloc_strdup failed.\n"));
            ret = ENOMEM;
            goto done;
        }

        ret = sysdb_attrs_get_string(reply[c], IPA_TRUSTED_DOMAIN_SID, &value);
        if (ret == EOK) {
            range_list[c]->trusted_dom_sid = talloc_strdup(range_list[c],
                                                           value);
            if (range_list[c]->trusted_dom_sid == NULL) {
                DEBUG(SSSDBG_OP_FAILURE, ("talloc_strdup failed.\n"));
                ret = ENOMEM;
                goto done;
            }
        } else if (ret != ENOENT) {
            DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
            goto done;
        }

        ret = sysdb_attrs_get_uint32_t(reply[c], IPA_BASE_ID,
                                       &range_list[c]->base_id);
        if (ret != EOK && ret != ENOENT) {
            DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
            goto done;
        }

        ret = sysdb_attrs_get_uint32_t(reply[c], IPA_ID_RANGE_SIZE,
                                       &range_list[c]->id_range_size);
        if (ret != EOK && ret != ENOENT) {
            DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
            goto done;
        }

        ret = sysdb_attrs_get_uint32_t(reply[c], IPA_BASE_RID,
                                       &range_list[c]->base_rid);
        if (ret != EOK && ret != ENOENT) {
            DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
            goto done;
        }

        ret = sysdb_attrs_get_uint32_t(reply[c], IPA_SECONDARY_BASE_RID,
                                       &range_list[c]->secondary_base_rid);
        if (ret != EOK && ret != ENOENT) {
            DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
            goto done;
        }
    }
    range_list[c] = NULL;

    *_range_list = range_list;
    ret = EOK;

done:
    if (ret != EOK) {
        talloc_free(range_list);
    }

    return ret;
}

static errno_t ipa_subdom_store(struct sss_domain_info *domain,
                                struct sysdb_attrs *attrs)
{
    TALLOC_CTX *tmp_ctx;
    const char *name;
    char *realm;
    const char *flat;
    const char *id;
    int ret;

    tmp_ctx = talloc_new(domain);

    ret = sysdb_attrs_get_string(attrs, IPA_CN, &name);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
        goto done;
    }

    realm = get_uppercase_realm(tmp_ctx, name);
    if (!realm) {
        ret = ENOMEM;
        goto done;
    }

    ret = sysdb_attrs_get_string(attrs, IPA_FLATNAME, &flat);
    if (ret) {
        DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
        goto done;
    }

    ret = sysdb_attrs_get_string(attrs, IPA_TRUSTED_DOMAIN_SID, &id);
    if (ret) {
        DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
        goto done;
    }

    ret = sysdb_subdomain_store(domain->sysdb, name, realm, flat, id);
    if (ret) {
        DEBUG(SSSDBG_OP_FAILURE, ("sysdb_subdomain_store failed.\n"));
        goto done;
    }

    ret = EOK;
done:
    talloc_free(tmp_ctx);
    return ret;
}

static errno_t
ipa_subdomains_write_mappings(struct sss_domain_info *domain)
{
    struct sss_domain_info *dom;
    errno_t ret;
    errno_t err;
    TALLOC_CTX *tmp_ctx;
    const char *mapping_file;
    char *sanitized_domain;
    char *tmp_file = NULL;
    int fd = -1;
    mode_t old_mode;
    FILE *fstream = NULL;
    int i;

    if (domain == NULL || domain->name == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("No domain name provided\n"));
        return EINVAL;
    }

    tmp_ctx = talloc_new(NULL);
    if (!tmp_ctx) return ENOMEM;

    sanitized_domain = talloc_strdup(tmp_ctx, domain->name);
    if (sanitized_domain == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_strdup() failed\n"));
        return ENOMEM;
    }

    /* only alpha-numeric chars, dashes and underscores are allowed in
     * krb5 include directory */
    for (i = 0; sanitized_domain[i] != '\0'; i++) {
        if (!isalnum(sanitized_domain[i])
                && sanitized_domain[i] != '-' && sanitized_domain[i] != '_') {
            sanitized_domain[i] = '_';
        }
    }

    mapping_file = talloc_asprintf(tmp_ctx, "%s/domain_realm_%s",
                                   IPA_SUBDOMAIN_MAPPING_DIR, sanitized_domain);
    if (!mapping_file) {
        ret = ENOMEM;
        goto done;
    }

    DEBUG(SSSDBG_FUNC_DATA, ("Mapping file for domain [%s] is [%s]\n",
                             domain->name, mapping_file));

    tmp_file = talloc_asprintf(tmp_ctx, "%sXXXXXX", mapping_file);
    if (tmp_file == NULL) {
        ret = ENOMEM;
        goto done;
    }

    old_mode = umask(077);
    fd = mkstemp(tmp_file);
    umask(old_mode);
    if (fd < 0) {
        DEBUG(SSSDBG_OP_FAILURE, ("creating the temp file [%s] for domain-realm "
                                  "mappings failed.", tmp_file));
        ret = EIO;
        talloc_zfree(tmp_ctx);
        goto done;
    }

    fstream = fdopen(fd, "a");
    if (!fstream) {
        ret = errno;
        DEBUG(SSSDBG_OP_FAILURE, ("fdopen failed [%d]: %s\n",
                                  ret, strerror(ret)));
        ret = close(fd);
        if (ret != 0) {
            ret = errno;
            DEBUG(SSSDBG_CRIT_FAILURE,
                ("fclose failed [%d][%s].\n", ret, strerror(ret)));
            /* Nothing to do here, just report the failure */
        }
        ret = EIO;
        goto done;
    }

    ret = fprintf(fstream, "[domain_realm]\n");
    if (ret < 0) {
        DEBUG(SSSDBG_OP_FAILURE, ("fprintf failed\n"));
        ret = EIO;
        goto done;
    }

    for (dom = get_next_domain(domain, true);
         dom && IS_SUBDOMAIN(dom); /* if we get back to a parent, stop */
         dom = get_next_domain(dom, false)) {
        ret = fprintf(fstream, ".%s = %s\n%s = %s\n",
                               dom->name, dom->realm, dom->name, dom->realm);
        if (ret < 0) {
            DEBUG(SSSDBG_CRIT_FAILURE, ("fprintf failed\n"));
            goto done;
        }
    }

    ret = fclose(fstream);
    fstream = NULL;
    if (ret != 0) {
        ret = errno;
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("fclose failed [%d][%s].\n", ret, strerror(ret)));
        goto done;
    }

    ret = rename(tmp_file, mapping_file);
    if (ret == -1) {
        ret = errno;
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("rename failed [%d][%s].\n", ret, strerror(ret)));
        goto done;
    }

    talloc_zfree(tmp_file);

    ret = chmod(mapping_file, 0644);
    if (ret == -1) {
        ret = errno;
        DEBUG(SSSDBG_CRIT_FAILURE,
              ("fchmod failed [%d][%s].\n", ret, strerror(ret)));
        goto done;
    }

    ret = EOK;
done:
    if (fstream) {
        err = fclose(fstream);
        if (err != 0) {
            err = errno;
            DEBUG(SSSDBG_CRIT_FAILURE,
                ("fclose failed [%d][%s].\n", err, strerror(err)));
            /* Nothing to do here, just report the failure */
        }
    }

    if (tmp_file) {
        err = unlink(tmp_file);
        if (err < 0) {
            err = errno;
            DEBUG(SSSDBG_MINOR_FAILURE,
                  ("Could not remove file [%s]: [%d]: %s",
                   tmp_file, err, strerror(err)));
        }
    }
    talloc_free(tmp_ctx);
    return ret;
}

static errno_t ipa_subdomains_refresh(struct ipa_subdomains_ctx *ctx,
                                      int count, struct sysdb_attrs **reply,
                                      bool *changes)
{
    struct sss_domain_info *domain, *dom;
    bool handled[count];
    const char *value;
    int c, h;
    int ret;

    domain = ctx->be_ctx->domain;
    memset(handled, 0, sizeof(bool) * count);
    h = 0;

    /* check existing subdomains */
    for (dom = get_next_domain(domain, true);
         dom && IS_SUBDOMAIN(dom); /* if we get back to a parent, stop */
         dom = get_next_domain(dom, false)) {
        for (c = 0; c < count; c++) {
            if (handled[c]) {
                continue;
            }
            ret = sysdb_attrs_get_string(reply[c], IPA_CN, &value);
            if (ret != EOK) {
                DEBUG(SSSDBG_OP_FAILURE, ("sysdb_attrs_get_string failed.\n"));
                goto done;
            }
            if (strcmp(value, dom->name) == 0) {
                break;
            }
        }

        if (c >= count) {
            /* ok this subdomain does not exist anymore, let's clean up */
            dom->disabled = true;
            ret = sysdb_subdomain_delete(dom->sysdb, dom->name);
            if (ret != EOK) {
                goto done;
            }
        } else {
            /* ok let's try to update it */
            ret = ipa_subdom_store(domain, reply[c]);
            if (ret) {
                /* Nothing we can do about the errorr. Let's at least try
                 * to reuse the existing domain
                 */
                DEBUG(SSSDBG_MINOR_FAILURE, ("Failed to parse subdom data, "
                      "will try to use cached subdomain\n"));
            }
            handled[c] = true;
            h++;
        }
    }

    if (count == h) {
        /* all domains were already accounted for and have been updated */
        ret = EOK;
        goto done;
    }

    /* if we get here it means we have changes to the subdomains list */
    *changes = true;

    for (c = 0; c < count; c++) {
        if (handled[c]) {
            continue;
        }
        /* Nothing we can do about the errorr. Let's at least try
         * to reuse the existing domain.
         */
        ret = ipa_subdom_store(domain, reply[c]);
        if (ret) {
            DEBUG(SSSDBG_MINOR_FAILURE, ("Failed to parse subdom data, "
                  "will try to use cached subdomain\n"));
        }
    }

    ret = EOK;

done:
    if (ret != EOK) {
        ctx->last_refreshed = 0;
    } else {
        ctx->last_refreshed = time(NULL);
    }

    return ret;
}

struct ipa_subdomains_req_ctx {
    struct be_req *be_req;
    struct ipa_subdomains_ctx *sd_ctx;
    struct sdap_id_op *sdap_op;

    char *current_filter;

    struct sdap_search_base **search_bases;
    int search_base_iter;

    size_t reply_count;
    struct sysdb_attrs **reply;
};

static void ipa_subdomains_get_conn_done(struct tevent_req *req);
static errno_t
ipa_subdomains_handler_get(struct ipa_subdomains_req_ctx *ctx,
                           enum ipa_subdomains_req_type type);
static void ipa_subdomains_handler_done(struct tevent_req *req);
static void ipa_subdomains_handler_master_done(struct tevent_req *req);
static void ipa_subdomains_handler_ranges_done(struct tevent_req *req);

static struct ipa_subdomains_req_params subdomain_requests[] = {
    { MASTER_DOMAIN_FILTER,
      ipa_subdomains_handler_master_done,
      { IPA_CN, IPA_FLATNAME, IPA_SID, NULL }
    },
    { SUBDOMAINS_FILTER,
      ipa_subdomains_handler_done,
      { IPA_CN, IPA_FLATNAME, IPA_TRUSTED_DOMAIN_SID, NULL }
    },
    { RANGE_FILTER,
      ipa_subdomains_handler_ranges_done,
      { OBJECTCLASS, IPA_CN,
        IPA_BASE_ID, IPA_BASE_RID, IPA_SECONDARY_BASE_RID,
        IPA_ID_RANGE_SIZE, IPA_TRUSTED_DOMAIN_SID, NULL
      }
    }
};

static void ipa_subdomains_retrieve(struct ipa_subdomains_ctx *ctx, struct be_req *be_req)
{
    struct ipa_subdomains_req_ctx *req_ctx = NULL;
    struct tevent_req *req;
    int dp_error = DP_ERR_FATAL;
    int ret;

    req_ctx = talloc(be_req, struct ipa_subdomains_req_ctx);
    if (req_ctx == NULL) {
        ret = ENOMEM;
        goto done;
    }

    req_ctx->be_req = be_req;
    req_ctx->sd_ctx = ctx;
    req_ctx->search_base_iter = 0;
    req_ctx->search_bases = ctx->search_bases;
    req_ctx->current_filter = NULL;
    req_ctx->reply_count = 0;
    req_ctx->reply = NULL;

    req_ctx->sdap_op = sdap_id_op_create(req_ctx,
                                         ctx->sdap_id_ctx->conn_cache);
    if (req_ctx->sdap_op == NULL) {
        DEBUG(SSSDBG_OP_FAILURE, ("sdap_id_op_create failed.\n"));
        ret = ENOMEM;
        goto done;
    }

    req = sdap_id_op_connect_send(req_ctx->sdap_op, req_ctx, &ret);
    if (req == NULL) {
        DEBUG(SSSDBG_OP_FAILURE, ("sdap_id_op_connect_send failed: %d(%s).\n",
                                  ret, strerror(ret)));
        goto done;
    }

    tevent_req_set_callback(req, ipa_subdomains_get_conn_done, req_ctx);

    return;

done:
    talloc_free(req_ctx);
    if (ret == EOK) {
        dp_error = DP_ERR_OK;
    }
    be_req_terminate(be_req, dp_error, ret, NULL);
}

static void ipa_subdomains_get_conn_done(struct tevent_req *req)
{
    int ret;
    int dp_error = DP_ERR_FATAL;
    struct ipa_subdomains_req_ctx *ctx;

    ctx = tevent_req_callback_data(req, struct ipa_subdomains_req_ctx);

    ret = sdap_id_op_connect_recv(req, &dp_error);
    talloc_zfree(req);
    if (ret) {
        if (dp_error == DP_ERR_OFFLINE) {
            DEBUG(SSSDBG_MINOR_FAILURE,
                  ("No IPA server is available, cannot get the "
                   "subdomain list while offline\n"));

/* FIXME: return saved results ?? */
        } else {
            DEBUG(SSSDBG_OP_FAILURE,
                  ("Failed to connect to IPA server: [%d](%s)\n",
                   ret, strerror(ret)));
        }

        goto fail;
    }

    ret = ipa_subdomains_handler_get(ctx, IPA_SUBDOMAINS_SLAVE);
    if (ret != EOK && ret != EAGAIN) {
        goto fail;
    }

    return;

fail:
    be_req_terminate(ctx->be_req, dp_error, ret, NULL);
}

static errno_t
ipa_subdomains_handler_get(struct ipa_subdomains_req_ctx *ctx,
                           enum ipa_subdomains_req_type type)
{
    struct tevent_req *req;
    struct sdap_search_base *base;
    struct ipa_subdomains_req_params *params;

    if (type >= IPA_SUBDOMAINS_MAX) {
        return EINVAL;
    }

    params = &subdomain_requests[type];

    base = ctx->search_bases[ctx->search_base_iter];
    if (base == NULL) {
        return EOK;
    }

    talloc_free(ctx->current_filter);
    ctx->current_filter = sdap_get_id_specific_filter(ctx, params->filter,
                                                            base->filter);
    if (ctx->current_filter == NULL) {
        return ENOMEM;
    }

    req = sdap_get_generic_send(ctx, ctx->sd_ctx->be_ctx->ev,
                        ctx->sd_ctx->sdap_id_ctx->opts,
                        sdap_id_op_handle(ctx->sdap_op),
                        base->basedn, base->scope,
                        ctx->current_filter, params->attrs, NULL, 0,
                        dp_opt_get_int(ctx->sd_ctx->sdap_id_ctx->opts->basic,
                                       SDAP_SEARCH_TIMEOUT), false);

    if (req == NULL) {
        DEBUG(SSSDBG_OP_FAILURE, ("sdap_get_generic_send failed.\n"));
        return ENOMEM;
    }

    tevent_req_set_callback(req, params->cb, ctx);

    return EAGAIN;
}

static void ipa_subdomains_handler_done(struct tevent_req *req)
{
    int ret;
    size_t reply_count;
    struct sysdb_attrs **reply = NULL;
    struct ipa_subdomains_req_ctx *ctx;
    struct sss_domain_info *domain;
    bool refresh_has_changes = false;

    ctx = tevent_req_callback_data(req, struct ipa_subdomains_req_ctx);
    domain = ctx->sd_ctx->be_ctx->domain;

    ret = sdap_get_generic_recv(req, ctx, &reply_count, &reply);
    talloc_zfree(req);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("sdap_get_generic_send request failed.\n"));
        goto done;
    }

    if (reply_count) {
        ctx->reply = talloc_realloc(ctx, ctx->reply, struct sysdb_attrs *,
                                    ctx->reply_count + reply_count);
        if (ctx->reply == NULL) {
            ret = ENOMEM;
            goto done;
        }
        memcpy(ctx->reply+ctx->reply_count, reply,
               reply_count * sizeof(struct sysdb_attrs *));
        ctx->reply_count += reply_count;
    }

    ctx->search_base_iter++;
    ret = ipa_subdomains_handler_get(ctx, IPA_SUBDOMAINS_SLAVE);
    if (ret == EAGAIN) {
        return;
    } else if (ret != EOK) {
        goto done;
    }

    ret = ipa_subdomains_refresh(ctx->sd_ctx, ctx->reply_count, ctx->reply,
                                 &refresh_has_changes);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("Failed to refresh subdomains.\n"));
        goto done;
    }

    if (refresh_has_changes) {
        ret = sysdb_update_subdomains(domain);
        if (ret != EOK) {
            DEBUG(SSSDBG_OP_FAILURE, ("sysdb_update_subdomains failed.\n"));
            goto done;
        }

        ret = ipa_subdomains_write_mappings(domain);
        if (ret != EOK) {
            DEBUG(SSSDBG_MINOR_FAILURE,
                  ("ipa_subdomains_write_mappings failed.\n"));
        }
    }


    ctx->search_base_iter = 0;
    ctx->search_bases = ctx->sd_ctx->ranges_search_bases;
    ret = ipa_subdomains_handler_get(ctx, IPA_SUBDOMAINS_RANGES);
    if (ret == EAGAIN) {
        return;
    } else if (ret != EOK) {
        goto done;
    }

    DEBUG(SSSDBG_OP_FAILURE, ("No search base for ranges available.\n"));
    ret = EINVAL;

done:
    be_req_terminate(ctx->be_req, DP_ERR_FATAL, ret, NULL);
}


static void ipa_subdomains_handler_ranges_done(struct tevent_req *req)
{
    errno_t ret;
    int dp_error = DP_ERR_FATAL;
    size_t reply_count;
    struct sysdb_attrs **reply = NULL;
    struct ipa_subdomains_req_ctx *ctx;
    struct range_info **range_list = NULL;
    struct sysdb_ctx *sysdb;
    struct sss_domain_info *domain;

    ctx = tevent_req_callback_data(req, struct ipa_subdomains_req_ctx);
    domain = ctx->sd_ctx->be_ctx->domain;
    sysdb = domain->sysdb;

    ret = sdap_get_generic_recv(req, ctx, &reply_count, &reply);
    talloc_zfree(req);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("sdap_get_generic_send request failed.\n"));
        goto done;
    }

    ret = ipa_ranges_parse_results(ctx, reply_count, reply, &range_list);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE,
              ("ipa_ranges_parse_results request failed.\n"));
        goto done;
    }

    ret = sysdb_update_ranges(sysdb, range_list);
    talloc_free(range_list);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("sysdb_update_ranges failed.\n"));
        goto done;
    }


    ret = sysdb_master_domain_update(domain);
    if (ret != EOK) {
        goto done;
    }

    if (domain->flat_name == NULL ||
        domain->domain_id == NULL ||
        domain->realm == NULL) {

        ctx->search_base_iter = 0;
        ctx->search_bases = ctx->sd_ctx->master_search_bases;
        ret = ipa_subdomains_handler_get(ctx, IPA_SUBDOMAINS_MASTER);
        if (ret == EAGAIN) {
            return;
        } else if (ret != EOK) {
            goto done;
        }
    } else {
        ret = EOK;
    }

done:
    if (ret == EOK) {
        dp_error = DP_ERR_OK;
    }
    be_req_terminate(ctx->be_req, dp_error, ret, NULL);
}

static void ipa_subdomains_handler_master_done(struct tevent_req *req)
{
    errno_t ret;
    int dp_error = DP_ERR_FATAL;
    size_t reply_count;
    struct sysdb_attrs **reply = NULL;
    struct ipa_subdomains_req_ctx *ctx;

    ctx = tevent_req_callback_data(req, struct ipa_subdomains_req_ctx);

    ret = sdap_get_generic_recv(req, ctx, &reply_count, &reply);
    talloc_zfree(req);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("sdap_get_generic_send request failed.\n"));
        goto done;
    }

    if (reply_count) {
        const char *flat = NULL;
        const char *id = NULL;

        ret = sysdb_attrs_get_string(reply[0], IPA_FLATNAME, &flat);
        if (ret != EOK) {
            goto done;
        }

        ret = sysdb_attrs_get_string(reply[0], IPA_SID, &id);
        if (ret != EOK) {
            goto done;
        }

        ret = sysdb_master_domain_add_info(ctx->sd_ctx->be_ctx->domain,
                                           NULL, flat, id);
    } else {
        ctx->search_base_iter++;
        ret = ipa_subdomains_handler_get(ctx, IPA_SUBDOMAINS_MASTER);
        if (ret == EAGAIN) {
            return;
        } else if (ret != EOK) {
            goto done;
        }

        /* Right now we know there has been an error
         * and we don't have the master domain record
         */
        DEBUG(SSSDBG_CRIT_FAILURE, ("Master domain record not found!\n"));

        if (!ctx->sd_ctx->configured_explicit) {
            ctx->sd_ctx->disabled_until = time(NULL) +
                                          IPA_SUBDOMAIN_DISABLED_PERIOD;
        }

        ret = EIO;
    }

done:
    if (ret == EOK) {
        dp_error = DP_ERR_OK;
    }
    be_req_terminate(ctx->be_req, dp_error, ret, NULL);
}

static void ipa_subdom_online_cb(void *pvt);

static void ipa_subdom_timer_refresh(struct tevent_context *ev,
                                     struct tevent_timer *te,
                                     struct timeval current_time,
                                     void *pvt)
{
    ipa_subdom_online_cb(pvt);
}

static void ipa_subdom_be_req_callback(struct be_req *be_req,
                                       int dp_err, int dp_ret,
                                       const char *errstr)
{
    talloc_free(be_req);
}

static void ipa_subdom_online_cb(void *pvt)
{
    struct ipa_subdomains_ctx *ctx;
    struct be_req *be_req;
    struct timeval tv;

    ctx = talloc_get_type(pvt, struct ipa_subdomains_ctx);
    if (!ctx) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("Bad private pointer\n"));
        return;
    }

    ctx->disabled_until = 0;

    be_req = be_req_create(ctx, NULL, ctx->be_ctx,
                           ipa_subdom_be_req_callback, NULL);
    if (be_req == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("be_req_create() failed.\n"));
        return;
    }

    ipa_subdomains_retrieve(ctx, be_req);

    tv = tevent_timeval_current_ofs(IPA_SUBDOMAIN_REFRESH_PERIOD, 0);
    ctx->timer_event = tevent_add_timer(ctx->be_ctx->ev, ctx, tv,
                                        ipa_subdom_timer_refresh, ctx);
    if (!ctx->timer_event) {
        DEBUG(SSSDBG_MINOR_FAILURE, ("Failed to add subdom timer event\n"));
    }
}

static void ipa_subdom_offline_cb(void *pvt)
{
    struct ipa_subdomains_ctx *ctx;

    ctx = talloc_get_type(pvt, struct ipa_subdomains_ctx);

    if (ctx) {
        talloc_zfree(ctx->timer_event);
    }
}

static errno_t get_config_status(struct be_ctx *be_ctx,
                                 bool *configured_explicit)
{
    int ret;
    TALLOC_CTX *tmp_ctx = NULL;
    char *tmp_str;

    tmp_ctx = talloc_new(NULL);
    if (tmp_ctx == NULL) {
        DEBUG(SSSDBG_OP_FAILURE, ("talloc_new failed.\n"));
        return ENOMEM;
    }

    ret = confdb_get_string(be_ctx->cdb, tmp_ctx, be_ctx->conf_path,
                            CONFDB_DOMAIN_SUBDOMAINS_PROVIDER, NULL,
                            &tmp_str);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("confdb_get_string failed.\n"));
        goto done;
    }

    if (tmp_str == NULL) {
        *configured_explicit = false;
    } else {
        *configured_explicit = true;
    }

    DEBUG(SSSDBG_TRACE_ALL, ("IPA subdomain provider is configured %s.\n",
                             *configured_explicit ? "explicit" : "implicit"));

    ret = EOK;

done:
    talloc_free(tmp_ctx);

    return ret;
}

void ipa_subdomains_handler(struct be_req *be_req)
{
    struct be_ctx *be_ctx = be_req_get_be_ctx(be_req);
    struct ipa_subdomains_ctx *ctx;
    time_t now;

    ctx = talloc_get_type(be_ctx->bet_info[BET_SUBDOMAINS].pvt_bet_data,
                          struct ipa_subdomains_ctx);
    if (!ctx) {
        be_req_terminate(be_req, DP_ERR_FATAL, EINVAL, NULL);
        return;
    }

    now = time(NULL);

    if (ctx->disabled_until > now) {
        DEBUG(SSSDBG_TRACE_ALL, ("Subdomain provider disabled.\n"));
        be_req_terminate(be_req, DP_ERR_OK, EOK, NULL);
        return;
    }

    if (ctx->last_refreshed > now - IPA_SUBDOMAIN_REFRESH_LIMIT) {
        be_req_terminate(be_req, DP_ERR_OK, EOK, NULL);
        return;
    }

    ipa_subdomains_retrieve(ctx, be_req);
}

struct bet_ops ipa_subdomains_ops = {
    .handler = ipa_subdomains_handler,
    .finalize = NULL
};

int ipa_subdom_init(struct be_ctx *be_ctx,
                    struct ipa_id_ctx *id_ctx,
                    struct bet_ops **ops,
                    void **pvt_data)
{
    struct ipa_subdomains_ctx *ctx;
    int ret;
    bool configured_explicit = false;

    ret = get_config_status(be_ctx, &configured_explicit);
    if (ret != EOK) {
        DEBUG(SSSDBG_OP_FAILURE, ("get_config_status failed.\n"));
        return ret;
    }

    ctx = talloc_zero(id_ctx, struct ipa_subdomains_ctx);
    if (ctx == NULL) {
        DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_zero failed.\n"));
        return ENOMEM;
    }

    ctx->be_ctx = be_ctx;
    ctx->sdap_id_ctx = id_ctx->sdap_id_ctx;
    ctx->search_bases = id_ctx->ipa_options->subdomains_search_bases;
    ctx->master_search_bases = id_ctx->ipa_options->master_domain_search_bases;
    ctx->ranges_search_bases = id_ctx->ipa_options->ranges_search_bases;
    ctx->configured_explicit = configured_explicit;
    ctx->disabled_until = 0;
    *ops = &ipa_subdomains_ops;
    *pvt_data = ctx;

    ret = be_add_online_cb(ctx, be_ctx, ipa_subdom_online_cb, ctx, NULL);
    if (ret != EOK) {
        DEBUG(SSSDBG_MINOR_FAILURE, ("Failed to add subdom online callback"));
    }

    ret = be_add_offline_cb(ctx, be_ctx, ipa_subdom_offline_cb, ctx, NULL);
    if (ret != EOK) {
        DEBUG(SSSDBG_MINOR_FAILURE, ("Failed to add subdom offline callback"));
    }

    return EOK;
}