-
Notifications
You must be signed in to change notification settings - Fork 1.7k
/
Copy pathsplunk.c
1205 lines (1019 loc) · 38.3 KB
/
splunk.c
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
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2024 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fluent-bit/flb_output_plugin.h>
#include <fluent-bit/flb_http_client.h>
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/flb_mp.h>
#include <fluent-bit/flb_time.h>
#include <fluent-bit/flb_gzip.h>
#include <fluent-bit/flb_ra_key.h>
#include <fluent-bit/flb_metrics.h>
#include <fluent-bit/flb_log_event_decoder.h>
#include <msgpack.h>
#include "splunk.h"
#include "splunk_conf.h"
static int cb_splunk_init(struct flb_output_instance *ins,
struct flb_config *config, void *data)
{
struct flb_splunk *ctx;
ctx = flb_splunk_conf_create(ins, config);
if (!ctx) {
flb_plg_error(ins, "configuration failed");
return -1;
}
flb_output_set_context(ins, ctx);
/*
* This plugin instance uses the HTTP client interface, let's register
* it debugging callbacks.
*/
flb_output_set_http_debug_callbacks(ins);
return 0;
}
static msgpack_object *local_msgpack_map_lookup(
msgpack_object *map_object,
char *key)
{
size_t key_length;
size_t index;
msgpack_object_map *map;
if (key == NULL) {
return NULL;
}
if (map_object == NULL) {
return NULL;
}
if (map_object->type != MSGPACK_OBJECT_MAP) {
return NULL;
}
map = &map_object->via.map;
key_length = strlen(key);
for (index = 0; index < map->size ; index++) {
if (map->ptr[index].key.type == MSGPACK_OBJECT_STR) {
if (map->ptr[index].key.via.str.size == key_length) {
if (strncmp(map->ptr[index].key.via.str.ptr,
key,
key_length) == 0) {
return &map->ptr[index].val;
}
}
}
}
return NULL;
}
static int local_msgpack_map_string_lookup(
msgpack_object *map_object,
char *key,
char **value,
size_t *value_size)
{
msgpack_object *value_object;
value_object = local_msgpack_map_lookup(map_object, key);
if (value_object == NULL) {
return -1;
}
if (value_object->type != MSGPACK_OBJECT_STR) {
return -2;
}
*value = (char *) value_object->via.str.ptr;
*value_size = value_object->via.str.size;
return 0;
}
static int local_msgpack_map_string_extract(
msgpack_object *map_object,
char *key,
char *output_buffer,
size_t output_buffer_size)
{
size_t value_size;
int result;
char *value;
result = local_msgpack_map_string_lookup(map_object,
key,
&value,
&value_size);
if (result != 0) {
return -1;
}
if (value_size >= output_buffer_size) {
return -2;
}
strncpy(output_buffer,
value,
value_size);
output_buffer[value_size] = '\0';
return 0;
}
static inline void local_msgpack_pack_cstr(msgpack_packer *packer, char *value)
{
msgpack_pack_str(packer, strlen(value));
msgpack_pack_str_body(packer, value, strlen(value));
}
static int pack_otel_data(struct flb_splunk *ctx,
msgpack_packer *mp_pck,
struct flb_mp_map_header *mh_pck,
msgpack_object *group_metadata,
msgpack_object *group_attributes,
msgpack_object *record_attributes)
{
msgpack_object *source_map;
char schema[8];
int result;
int source_map_resource_attributes = FLB_FALSE;
struct flb_mp_map_header mh_tmp;
msgpack_object *value;
size_t index;
result = local_msgpack_map_string_extract(group_metadata,
"schema",
schema,
sizeof(schema));
if (result != 0) {
return 0;
}
if (strcmp(schema, "otlp") != 0) {
return 0;
}
source_map = local_msgpack_map_lookup(group_attributes, "resource");
if (source_map != NULL) {
source_map = local_msgpack_map_lookup(source_map, "attributes");
if (source_map != NULL) {
source_map_resource_attributes = FLB_TRUE;
value = local_msgpack_map_lookup(source_map, "host.name");
if (value != NULL) {
flb_mp_map_header_append(mh_pck);
local_msgpack_pack_cstr(mp_pck, "host");
msgpack_pack_object(mp_pck, *value);
}
}
}
flb_mp_map_header_append(mh_pck);
local_msgpack_pack_cstr(mp_pck, "fields");
flb_mp_map_header_init(&mh_tmp, mp_pck);
/* check if we have resource attributes to pack */
if (source_map_resource_attributes == FLB_TRUE) {
for (index = 0; index < source_map->via.map.size ; index++) {
flb_mp_map_header_append(&mh_tmp);
msgpack_pack_object(mp_pck, source_map->via.map.ptr[index].key);
msgpack_pack_object(mp_pck, source_map->via.map.ptr[index].val);
}
}
source_map = local_msgpack_map_lookup(record_attributes, "otlp");
if (source_map != NULL) {
value = local_msgpack_map_lookup(source_map,
"severity_number");
if (value != NULL &&
(value->type == MSGPACK_OBJECT_POSITIVE_INTEGER ||
value->type == MSGPACK_OBJECT_NEGATIVE_INTEGER)) {
flb_mp_map_header_append(&mh_tmp);
local_msgpack_pack_cstr(mp_pck, "otel.log.severity.number");
msgpack_pack_object(mp_pck, *value);
}
value = local_msgpack_map_lookup(source_map,
"severity_text");
if (value != NULL &&
value->type == MSGPACK_OBJECT_STR) {
flb_mp_map_header_append(&mh_tmp);
local_msgpack_pack_cstr(mp_pck, "otel.log.severity.text");
msgpack_pack_object(mp_pck, *value);
}
source_map = local_msgpack_map_lookup(source_map, "attributes");
if (source_map != NULL &&
source_map->type == MSGPACK_OBJECT_MAP) {
for (index = 0; index < source_map->via.map.size ; index++) {
flb_mp_map_header_append(&mh_tmp);
msgpack_pack_object(mp_pck, source_map->via.map.ptr[index].key);
msgpack_pack_object(mp_pck, source_map->via.map.ptr[index].val);
}
}
}
flb_mp_map_header_end(&mh_tmp);
return 0;
}
static int pack_map_meta(struct flb_splunk *ctx,
struct flb_mp_map_header *mh,
msgpack_packer *mp_pck,
msgpack_object map,
char *tag, int tag_len)
{
int index_key_set = FLB_FALSE;
int sourcetype_key_set = FLB_FALSE;
flb_sds_t str;
struct mk_list *head;
struct flb_splunk_field *f;
struct flb_mp_map_header mh_fields;
struct flb_ra_value *rval;
/* event host */
if (ctx->event_host) {
str = flb_ra_translate(ctx->ra_event_host, tag, tag_len,
map, NULL);
if (str) {
if (flb_sds_len(str) > 0) {
flb_mp_map_header_append(mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT_HOST) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT_HOST,
sizeof(FLB_SPLUNK_DEFAULT_EVENT_HOST) - 1);
msgpack_pack_str(mp_pck, flb_sds_len(str));
msgpack_pack_str_body(mp_pck, str, flb_sds_len(str));
}
flb_sds_destroy(str);
}
}
/* event source */
if (ctx->event_source) {
str = flb_ra_translate(ctx->ra_event_source, tag, tag_len,
map, NULL);
if (str) {
if (flb_sds_len(str) > 0) {
flb_mp_map_header_append(mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT_SOURCE) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT_SOURCE,
sizeof(FLB_SPLUNK_DEFAULT_EVENT_SOURCE) - 1);
msgpack_pack_str(mp_pck, flb_sds_len(str));
msgpack_pack_str_body(mp_pck, str, flb_sds_len(str));
}
flb_sds_destroy(str);
}
}
/* event sourcetype (key lookup) */
if (ctx->event_sourcetype_key) {
str = flb_ra_translate(ctx->ra_event_sourcetype_key, tag, tag_len,
map, NULL);
if (str) {
/* sourcetype_key was found */
if (flb_sds_len(str) > 0) {
flb_mp_map_header_append(mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT_SOURCET) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT_SOURCET,
sizeof(FLB_SPLUNK_DEFAULT_EVENT_SOURCET) - 1);
msgpack_pack_str(mp_pck, flb_sds_len(str));
msgpack_pack_str_body(mp_pck, str, flb_sds_len(str));
sourcetype_key_set = FLB_TRUE;
}
flb_sds_destroy(str);
}
/* If not found, it will fallback to the value set in event_sourcetype */
}
if (sourcetype_key_set == FLB_FALSE && ctx->event_sourcetype) {
flb_mp_map_header_append(mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT_SOURCET) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT_SOURCET,
sizeof(FLB_SPLUNK_DEFAULT_EVENT_SOURCET) - 1);
msgpack_pack_str(mp_pck, flb_sds_len(ctx->event_sourcetype));
msgpack_pack_str_body(mp_pck,
ctx->event_sourcetype, flb_sds_len(ctx->event_sourcetype));
}
/* event index (key lookup) */
if (ctx->event_index_key) {
str = flb_ra_translate(ctx->ra_event_index_key, tag, tag_len,
map, NULL);
if (str) {
/* sourcetype_key was found */
if (flb_sds_len(str) > 0) {
flb_mp_map_header_append(mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT_INDEX) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT_INDEX,
sizeof(FLB_SPLUNK_DEFAULT_EVENT_INDEX) - 1);
msgpack_pack_str(mp_pck, flb_sds_len(str));
msgpack_pack_str_body(mp_pck, str, flb_sds_len(str));
index_key_set = FLB_TRUE;
}
flb_sds_destroy(str);
}
/* If not found, it will fallback to the value set in event_index */
}
if (index_key_set == FLB_FALSE && ctx->event_index) {
flb_mp_map_header_append(mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT_INDEX) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT_INDEX,
sizeof(FLB_SPLUNK_DEFAULT_EVENT_INDEX) - 1);
msgpack_pack_str(mp_pck, flb_sds_len(ctx->event_index));
msgpack_pack_str_body(mp_pck,
ctx->event_index, flb_sds_len(ctx->event_index));
}
/* event 'fields' */
if (mk_list_size(&ctx->fields) > 0) {
flb_mp_map_header_append(mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT_FIELDS) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT_FIELDS,
sizeof(FLB_SPLUNK_DEFAULT_EVENT_FIELDS) - 1);
/* Pack map */
flb_mp_map_header_init(&mh_fields, mp_pck);
mk_list_foreach(head, &ctx->fields) {
f = mk_list_entry(head, struct flb_splunk_field, _head);
rval = flb_ra_get_value_object(f->ra, map);
if (!rval) {
continue;
}
flb_mp_map_header_append(&mh_fields);
/* key */
msgpack_pack_str(mp_pck, flb_sds_len(f->key_name));
msgpack_pack_str_body(mp_pck, f->key_name, flb_sds_len(f->key_name));
/* value */
msgpack_pack_object(mp_pck, rval->o);
flb_ra_key_value_destroy(rval);
}
flb_mp_map_header_end(&mh_fields);
}
return 0;
}
static int pack_map(struct flb_splunk *ctx, msgpack_packer *mp_pck,
struct flb_time *tm,
msgpack_object *group_metadata,
msgpack_object *group_attributes,
msgpack_object *record_attributes,
msgpack_object map,
char *tag,
int tag_len)
{
int result;
int i;
double t;
int map_size;
msgpack_object k;
msgpack_object v;
struct flb_mp_map_header mh;
t = flb_time_to_double(tm);
map_size = map.via.map.size;
if (ctx->splunk_send_raw == FLB_TRUE) {
msgpack_pack_map(mp_pck, map_size /* all k/v */);
}
else {
flb_mp_map_header_init(&mh, mp_pck);
/* Append the time key */
flb_mp_map_header_append(&mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_TIME) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_TIME,
sizeof(FLB_SPLUNK_DEFAULT_TIME) - 1);
msgpack_pack_double(mp_pck, t);
/* Pack Splunk metadata */
pack_map_meta(ctx, &mh, mp_pck, map, tag, tag_len);
/* Pack Otel specific metadata */
result = pack_otel_data(ctx,
mp_pck,
&mh,
group_metadata,
group_attributes,
record_attributes);
if (result != 0) {
flb_plg_error(ctx->ins, "failed to pack otel data");
return -1;
}
/* Add k/v pairs under the key 'event' instead of to the top level object */
flb_mp_map_header_append(&mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT,
sizeof(FLB_SPLUNK_DEFAULT_EVENT) - 1);
flb_mp_map_header_end(&mh);
msgpack_pack_map(mp_pck, map_size);
}
/* Append k/v */
for (i = 0; i < map_size; i++) {
k = map.via.map.ptr[i].key;
v = map.via.map.ptr[i].val;
msgpack_pack_object(mp_pck, k);
msgpack_pack_object(mp_pck, v);
}
return 0;
}
static inline int pack_event_key(struct flb_splunk *ctx, msgpack_packer *mp_pck,
struct flb_time *tm, msgpack_object map,
char *tag, int tag_len)
{
double t;
struct flb_mp_map_header mh;
flb_sds_t val;
t = flb_time_to_double(tm);
val = flb_ra_translate(ctx->ra_event_key, tag, tag_len, map, NULL);
if (!val || flb_sds_len(val) == 0) {
if (val != NULL) {
flb_sds_destroy(val);
}
return -1;
}
if (ctx->splunk_send_raw == FLB_FALSE) {
flb_mp_map_header_init(&mh, mp_pck);
/* Append the time key */
flb_mp_map_header_append(&mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_TIME) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_TIME,
sizeof(FLB_SPLUNK_DEFAULT_TIME) - 1);
msgpack_pack_double(mp_pck, t);
/* Pack Splunk metadata */
pack_map_meta(ctx, &mh, mp_pck, map, tag, tag_len);
/* Add k/v pairs under the key 'event' instead of to the top level object */
flb_mp_map_header_append(&mh);
msgpack_pack_str(mp_pck, sizeof(FLB_SPLUNK_DEFAULT_EVENT) -1);
msgpack_pack_str_body(mp_pck,
FLB_SPLUNK_DEFAULT_EVENT,
sizeof(FLB_SPLUNK_DEFAULT_EVENT) - 1);
flb_mp_map_header_end(&mh);
}
msgpack_pack_str(mp_pck, flb_sds_len(val));
msgpack_pack_str_body(mp_pck, val, flb_sds_len(val));
flb_sds_destroy(val);
return 0;
}
#ifdef FLB_HAVE_METRICS
static inline int splunk_metrics_format(struct flb_output_instance *ins,
const void *in_buf, size_t in_bytes,
char **out_buf, size_t *out_size,
struct flb_splunk *ctx)
{
int ret;
size_t off = 0;
cfl_sds_t text;
cfl_sds_t host;
struct cmt *cmt = NULL;
if (ctx->event_host != NULL) {
host = ctx->event_host;
}
else {
host = "localhost";
}
/* get cmetrics context */
ret = cmt_decode_msgpack_create(&cmt, (char *) in_buf, in_bytes, &off);
if (ret != 0) {
flb_plg_error(ins, "could not process metrics payload");
return -1;
}
/* convert to text representation */
text = cmt_encode_splunk_hec_create(cmt, host, ctx->event_index, ctx->event_source, ctx->event_sourcetype);
/* destroy cmt context */
cmt_destroy(cmt);
*out_buf = text;
*out_size = flb_sds_len(text);
return 0;
}
#endif
/* implements functionality to get auth_header from msgpack map (metadata) */
static flb_sds_t extract_hec_token(struct flb_splunk *ctx, msgpack_object map,
char *tag, int tag_len)
{
flb_sds_t hec_token;
/* Extract HEC token (map which is from metadata lookup) */
if (ctx->metadata_auth_key) {
hec_token = flb_ra_translate(ctx->ra_metadata_auth_key, tag, tag_len,
map, NULL);
/*
* record accessor translation can return an empty string buffer if the
* translation was not successfull or the value was not found. We consider
* a valid token any string which length is greater than 0.
*
* note: flb_ra_translate_check() is not used here because it will print
* an error message if the translation fails:
*
* ref: https://github.com/fluent/fluent-bit/issues/8859
*/
if (hec_token && flb_sds_len(hec_token) > 0) {
return hec_token;
}
/* destroy empty string */
if (hec_token) {
flb_sds_destroy(hec_token);
}
flb_plg_debug(ctx->ins, "Could not find hec_token in metadata");
return NULL;
}
flb_plg_debug(ctx->ins, "Could not find a record accessor definition of hec_token");
return NULL;
}
static void set_metadata_auth_header(struct flb_splunk *ctx, flb_sds_t hec_token)
{
pthread_mutex_lock(&ctx->mutex_hec_token);
if (ctx->metadata_auth_header != NULL) {
flb_sds_destroy(ctx->metadata_auth_header);
}
ctx->metadata_auth_header = hec_token;
pthread_mutex_unlock(&ctx->mutex_hec_token);
}
static flb_sds_t get_metadata_auth_header(struct flb_splunk *ctx)
{
flb_sds_t auth_header = NULL;
pthread_mutex_lock(&ctx->mutex_hec_token);
if (ctx->metadata_auth_header) {
auth_header = flb_sds_create(ctx->metadata_auth_header);
}
pthread_mutex_unlock(&ctx->mutex_hec_token);
return auth_header;
}
static inline int splunk_format(const void *in_buf, size_t in_bytes,
char *tag, int tag_len,
char **out_buf, size_t *out_size,
struct flb_splunk *ctx)
{
int ret;
char *err;
msgpack_object map;
msgpack_object metadata;
msgpack_sbuffer mp_sbuf;
msgpack_packer mp_pck;
flb_sds_t tmp;
flb_sds_t record;
flb_sds_t json_out;
flb_sds_t metadata_hec_token = NULL;
struct flb_log_event_decoder log_decoder;
struct flb_log_event log_event;
json_out = flb_sds_create_size(in_bytes * 1.5);
if (!json_out) {
flb_errno();
return -1;
}
ret = flb_log_event_decoder_init(&log_decoder, (char *) in_buf, in_bytes);
if (ret != FLB_EVENT_DECODER_SUCCESS) {
flb_plg_error(ctx->ins,
"Log event decoder initialization error : %d", ret);
flb_sds_destroy(json_out);
return -1;
}
while ((ret = flb_log_event_decoder_next(
&log_decoder,
&log_event)) == FLB_EVENT_DECODER_SUCCESS) {
/* Create temporary msgpack buffer */
msgpack_sbuffer_init(&mp_sbuf);
msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write);
map = *log_event.body;
metadata = *log_event.metadata;
metadata_hec_token = extract_hec_token(ctx, metadata, tag, tag_len);
if (metadata_hec_token != NULL) {
/* Currently, in_splunk implementation permits to
* specify only one splunk token per one instance.
* So, it should be valid if storing only last value of
* splunk token per one chunk. */
set_metadata_auth_header(ctx, metadata_hec_token);
}
if (ctx->event_key) {
/* Pack the value of a event key */
ret = pack_event_key(ctx, &mp_pck, &log_event.timestamp, map, tag, tag_len);
if (ret != 0) {
/*
* if pack_event_key fails due to missing content in the
* record, we just warn the user and try to pack it
* as a normal map.
*/
ret = pack_map(ctx,
&mp_pck,
&log_event.timestamp,
log_event.group_metadata,
log_event.group_attributes,
log_event.metadata,
map,
tag,
tag_len);
}
}
else {
/* Pack as a map */
ret = pack_map(ctx,
&mp_pck,
&log_event.timestamp,
log_event.group_metadata,
log_event.group_attributes,
log_event.metadata,
map,
tag,
tag_len);
}
/* Validate packaging */
if (ret != 0) {
/* Format invalid record */
err = flb_msgpack_to_json_str(2048, &map);
if (err) {
/* Print error and continue processing other records */
flb_plg_warn(ctx->ins, "could not process or pack record: %s", err);
msgpack_sbuffer_destroy(&mp_sbuf);
flb_free(err);
}
continue;
}
/* Format as JSON */
record = flb_msgpack_raw_to_json_sds(mp_sbuf.data, mp_sbuf.size);
if (!record) {
flb_errno();
msgpack_sbuffer_destroy(&mp_sbuf);
flb_log_event_decoder_destroy(&log_decoder);
flb_sds_destroy(json_out);
return -1;
}
/* On raw mode, append a breakline to every record */
if (ctx->splunk_send_raw) {
tmp = flb_sds_cat(record, "\n", 1);
if (tmp) {
record = tmp;
}
}
tmp = flb_sds_cat(json_out, record, flb_sds_len(record));
flb_sds_destroy(record);
if (tmp) {
json_out = tmp;
}
else {
flb_errno();
msgpack_sbuffer_destroy(&mp_sbuf);
flb_log_event_decoder_destroy(&log_decoder);
flb_sds_destroy(json_out);
return -1;
}
msgpack_sbuffer_destroy(&mp_sbuf);
}
*out_buf = json_out;
*out_size = flb_sds_len(json_out);
flb_log_event_decoder_destroy(&log_decoder);
return 0;
}
static void debug_request_response(struct flb_splunk *ctx,
struct flb_http_client *c)
{
int ret;
int uncompressed = FLB_FALSE;
time_t now;
void *tmp_buf = NULL;
size_t tmp_size;
size_t req_size;
char *req_buf = NULL;
struct tm result;
struct tm *current;
unsigned char *ptr;
flb_sds_t req_headers = NULL;
flb_sds_t req_body = NULL;
if (c->body_len > 3) {
ptr = (unsigned char *) c->body_buf;
if (ptr[0] == 0x1F && ptr[1] == 0x8B && ptr[2] == 0x08) {
/* uncompress payload */
ret = flb_gzip_uncompress((void *) c->body_buf, c->body_len,
&tmp_buf, &tmp_size);
if (ret == -1) {
fprintf(stdout, "[out_splunk] could not uncompress data\n");
}
else {
req_buf = (char *) tmp_buf;
req_size = tmp_size;
uncompressed = FLB_TRUE;
}
}
else {
req_buf = (char *) c->body_buf;
req_size = c->body_len;
}
/* create a safe buffer */
if (req_buf) {
req_body = flb_sds_create_len(req_buf, req_size);
}
}
req_headers = flb_sds_create_len(c->header_buf, c->header_len);
if (c->resp.data)
now = time(NULL);
current = localtime_r(&now, &result);
fprintf(stdout,
"[%i/%02i/%02i %02i:%02i:%02i] "
"[out_splunk] debug HTTP 400 (bad request)\n"
">>> request\n"
"%s%s\n\n"
"<<< response\n"
"%s\n\n",
current->tm_year + 1900,
current->tm_mon + 1,
current->tm_mday,
current->tm_hour,
current->tm_min,
current->tm_sec,
req_headers,
req_body,
c->resp.data);
if (uncompressed) {
flb_free(tmp_buf);
}
if (req_headers) {
flb_sds_destroy(req_headers);
}
if (req_body) {
flb_sds_destroy(req_body);
}
}
static void cb_splunk_flush(struct flb_event_chunk *event_chunk,
struct flb_output_flush *out_flush,
struct flb_input_instance *i_ins,
void *out_context,
struct flb_config *config)
{
int ret;
int compressed = FLB_FALSE;
size_t b_sent;
flb_sds_t buf_data;
size_t resp_size;
size_t buf_size;
struct flb_splunk *ctx = out_context;
struct flb_connection *u_conn;
struct flb_http_client *c;
void *payload_buf;
size_t payload_size;
(void) i_ins;
(void) config;
flb_sds_t metadata_auth_header = NULL;
/* Get upstream connection */
u_conn = flb_upstream_conn_get(ctx->u);
if (!u_conn) {
FLB_OUTPUT_RETURN(FLB_RETRY);
}
#ifdef FLB_HAVE_METRICS
/* Check if the event type is metrics, handle the payload differently */
if (event_chunk->type == FLB_EVENT_TYPE_METRICS) {
ret = splunk_metrics_format(ctx->ins,
event_chunk->data,
event_chunk->size,
&buf_data, &buf_size, ctx);
}
#endif
if (event_chunk->type == FLB_EVENT_TYPE_LOGS) {
/* Convert binary logs into a JSON payload */
ret = splunk_format(event_chunk->data,
event_chunk->size,
(char *) event_chunk->tag,
flb_sds_len(event_chunk->tag),
&buf_data, &buf_size, ctx);
}
if (ret == -1) {
flb_upstream_conn_release(u_conn);
FLB_OUTPUT_RETURN(FLB_ERROR);
}
/* Map buffer */
payload_buf = buf_data;
payload_size = buf_size;
/* Should we compress the payload ? */
if (ctx->compress_gzip == FLB_TRUE) {
ret = flb_gzip_compress((void *) buf_data, buf_size,
&payload_buf, &payload_size);
if (ret == -1) {
flb_plg_error(ctx->ins,
"cannot gzip payload, disabling compression");
}
else {
compressed = FLB_TRUE;
/* JSON buffer is not longer needed */
flb_sds_destroy(buf_data);
}
}
/* Compose HTTP Client request */
c = flb_http_client(u_conn, FLB_HTTP_POST, FLB_SPLUNK_DEFAULT_ENDPOINT,
payload_buf, payload_size, NULL, 0, NULL, 0);
/* HTTP Response buffer size, honor value set by the user */
if (ctx->buffer_size > 0) {
flb_http_buffer_size(c, ctx->buffer_size);
}
else {
/*
* If no value was set, we try to accomodate by using our post
* payload size * 1.5, on that way we make room for large responses
* if something goes wrong, so we don't get a partial response.
*/
resp_size = payload_size * 1.5;
if (resp_size < 4096) {
resp_size = 4096;
}
flb_http_buffer_size(c, resp_size);
}
metadata_auth_header = get_metadata_auth_header(ctx);
/* HTTP Client */
flb_http_add_header(c, "User-Agent", 10, "Fluent-Bit", 10);
/*
* Authentication mechanism & order:
*
* 1. use the configure `http_user` and `http_passwd`
* 2. use metadata 'hec_token', if the records are generated by Splunk input plugin, this will be set.
* 3. use the configured `splunk_token` (if set).
*/
if (ctx->http_user && ctx->http_passwd) {
flb_http_basic_auth(c, ctx->http_user, ctx->http_passwd);
}
else if (metadata_auth_header) {
flb_http_add_header(c, "Authorization", 13,
metadata_auth_header,
flb_sds_len(metadata_auth_header));
}
else if (ctx->auth_header) {
flb_http_add_header(c, "Authorization", 13,
ctx->auth_header, flb_sds_len(ctx->auth_header));
}
/* Append Channel identifier header */
if (ctx->channel) {
flb_http_add_header(c, FLB_SPLUNK_CHANNEL_IDENTIFIER_HEADER,
strlen(FLB_SPLUNK_CHANNEL_IDENTIFIER_HEADER),
ctx->channel, ctx->channel_len);
}
/* Content Encoding: gzip */
if (compressed == FLB_TRUE) {
flb_http_set_content_encoding_gzip(c);
}
/* Map debug callbacks */
flb_http_client_debug(c, ctx->ins->callback);
/* Perform HTTP request */
ret = flb_http_do(c, &b_sent);
if (ret != 0) {
flb_plg_warn(ctx->ins, "http_do=%i", ret);
ret = FLB_RETRY;
}
else {
if (c->resp.status != 200) {
if (c->resp.payload_size > 0) {
flb_plg_warn(ctx->ins, "http_status=%i:\n%s",
c->resp.status, c->resp.payload);