forked from OISF/suricata
-
Notifications
You must be signed in to change notification settings - Fork 0
/
output-json.c
1100 lines (987 loc) · 36 KB
/
output-json.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
/* Copyright (C) 2007-2018 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* 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
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Tom DeCanio <td@npulsetech.com>
*
* Logs detection and monitoring events in JSON format.
*
*/
#include "suricata-common.h"
#include "debug.h"
#include "detect.h"
#include "flow.h"
#include "conf.h"
#include "threads.h"
#include "tm-threads.h"
#include "threadvars.h"
#include "util-debug.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-mpm.h"
#include "detect-reference.h"
#include "app-layer-parser.h"
#include "util-classification-config.h"
#include "util-syslog.h"
#include "output.h"
#include "output-json.h"
#include "util-byte.h"
#include "util-privs.h"
#include "util-print.h"
#include "util-proto-name.h"
#include "util-optimize.h"
#include "util-buffer.h"
#include "util-logopenfile.h"
#include "util-log-redis.h"
#include "util-device.h"
#include "util-validate.h"
#include "util-crypt.h"
#include "flow-var.h"
#include "flow-bit.h"
#include "source-pcap-file.h"
#define DEFAULT_LOG_FILENAME "eve.json"
#define DEFAULT_ALERT_SYSLOG_FACILITY_STR "local0"
#define DEFAULT_ALERT_SYSLOG_FACILITY LOG_LOCAL0
#define DEFAULT_ALERT_SYSLOG_LEVEL LOG_INFO
#define MODULE_NAME "OutputJSON"
#define MAX_JSON_SIZE 2048
static void OutputJsonDeInitCtx(OutputCtx *);
static void CreateJSONCommunityFlowId(json_t *js, const Flow *f, const uint16_t seed);
static const char *TRAFFIC_ID_PREFIX = "traffic/id/";
static const char *TRAFFIC_LABEL_PREFIX = "traffic/label/";
static size_t traffic_id_prefix_len = 0;
static size_t traffic_label_prefix_len = 0;
void OutputJsonRegister (void)
{
OutputRegisterModule(MODULE_NAME, "eve-log", OutputJsonInitCtx);
traffic_id_prefix_len = strlen(TRAFFIC_ID_PREFIX);
traffic_label_prefix_len = strlen(TRAFFIC_LABEL_PREFIX);
}
json_t *SCJsonBool(int val)
{
return (val ? json_true() : json_false());
}
/**
* Wrap json_decref. This is mainly to expose this function to Rust as its
* defined in the Jansson header file as an inline function.
*/
void SCJsonDecref(json_t *json)
{
json_decref(json);
}
json_t *SCJsonString(const char *val)
{
if (val == NULL){
return NULL;
}
json_t * retval = json_string(val);
char retbuf[MAX_JSON_SIZE] = {0};
if (retval == NULL) {
uint32_t u = 0;
uint32_t offset = 0;
for (u = 0; u < strlen(val); u++) {
if (isprint(val[u])) {
PrintBufferData(retbuf, &offset, MAX_JSON_SIZE-1, "%c",
val[u]);
} else {
PrintBufferData(retbuf, &offset, MAX_JSON_SIZE-1,
"\\x%02X", val[u]);
}
}
retbuf[offset] = '\0';
retval = json_string(retbuf);
}
return retval;
}
/* Default Sensor ID value */
static int64_t sensor_id = -1; /* -1 = not defined */
/**
* \brief Create a JSON string from a character sequence
*
* \param Pointer to character sequence
* \param Number of characters to use from the sequence
* \retval JSON object for the character sequence
*/
json_t *JsonAddStringN(const char *string, size_t size)
{
char tmpbuf[size + 1];
memcpy(tmpbuf, string, size);
tmpbuf[size] = '\0';
return SCJsonString(tmpbuf);
}
static void JsonAddPacketvars(const Packet *p, json_t *js_vars)
{
if (p == NULL || p->pktvar == NULL) {
return;
}
json_t *js_pktvars = NULL;
PktVar *pv = p->pktvar;
while (pv != NULL) {
if (pv->key || pv->id > 0) {
if (js_pktvars == NULL) {
js_pktvars = json_array();
if (js_pktvars == NULL)
break;
}
json_t *js_pair = json_object();
if (js_pair == NULL) {
break;
}
if (pv->key != NULL) {
uint32_t offset = 0;
uint8_t keybuf[pv->key_len + 1];
PrintStringsToBuffer(keybuf, &offset,
sizeof(keybuf),
pv->key, pv->key_len);
uint32_t len = pv->value_len;
uint8_t printable_buf[len + 1];
offset = 0;
PrintStringsToBuffer(printable_buf, &offset,
sizeof(printable_buf),
pv->value, pv->value_len);
json_object_set_new(js_pair, (char *)keybuf,
json_string((char *)printable_buf));
} else {
const char *varname = VarNameStoreLookupById(pv->id, VAR_TYPE_PKT_VAR);
uint32_t len = pv->value_len;
uint8_t printable_buf[len + 1];
uint32_t offset = 0;
PrintStringsToBuffer(printable_buf, &offset,
sizeof(printable_buf),
pv->value, pv->value_len);
json_object_set_new(js_pair, varname,
json_string((char *)printable_buf));
}
json_array_append_new(js_pktvars, js_pair);
}
pv = pv->next;
}
if (js_pktvars) {
json_object_set_new(js_vars, "pktvars", js_pktvars);
}
}
/**
* \brief Check if string s has prefix prefix.
*
* \retval true if string has prefix
* \retval false if string does not have prefix
*
* TODO: Move to file with other string handling functions.
*/
static bool SCStringHasPrefix(const char *s, const char *prefix)
{
if (strncmp(s, prefix, strlen(prefix)) == 0) {
return true;
}
return false;
}
/**
* \brief Add flow variables to a json object.
*
* Adds "flowvars" (map), "flowints" (map) and "flowbits" (array) to
* the json object provided as js_root.
*/
static void JsonAddFlowVars(const Flow *f, json_t *js_root, json_t **js_traffic)
{
if (f == NULL || f->flowvar == NULL) {
return;
}
json_t *js_flowvars = NULL;
json_t *js_traffic_id = NULL;
json_t *js_traffic_label = NULL;
json_t *js_flowints = NULL;
json_t *js_flowbits = NULL;
GenericVar *gv = f->flowvar;
while (gv != NULL) {
if (gv->type == DETECT_FLOWVAR || gv->type == DETECT_FLOWINT) {
FlowVar *fv = (FlowVar *)gv;
if (fv->datatype == FLOWVAR_TYPE_STR && fv->key == NULL) {
const char *varname = VarNameStoreLookupById(fv->idx,
VAR_TYPE_FLOW_VAR);
if (varname) {
if (js_flowvars == NULL) {
js_flowvars = json_array();
if (js_flowvars == NULL)
break;
}
uint32_t len = fv->data.fv_str.value_len;
uint8_t printable_buf[len + 1];
uint32_t offset = 0;
PrintStringsToBuffer(printable_buf, &offset,
sizeof(printable_buf),
fv->data.fv_str.value, fv->data.fv_str.value_len);
json_t *js_flowvar = json_object();
if (unlikely(js_flowvar == NULL)) {
break;
}
json_object_set_new(js_flowvar, varname,
json_string((char *)printable_buf));
json_array_append_new(js_flowvars, js_flowvar);
}
} else if (fv->datatype == FLOWVAR_TYPE_STR && fv->key != NULL) {
if (js_flowvars == NULL) {
js_flowvars = json_array();
if (js_flowvars == NULL)
break;
}
uint8_t keybuf[fv->keylen + 1];
uint32_t offset = 0;
PrintStringsToBuffer(keybuf, &offset,
sizeof(keybuf),
fv->key, fv->keylen);
uint32_t len = fv->data.fv_str.value_len;
uint8_t printable_buf[len + 1];
offset = 0;
PrintStringsToBuffer(printable_buf, &offset,
sizeof(printable_buf),
fv->data.fv_str.value, fv->data.fv_str.value_len);
json_t *js_flowvar = json_object();
if (unlikely(js_flowvar == NULL)) {
break;
}
json_object_set_new(js_flowvar, (const char *)keybuf,
json_string((char *)printable_buf));
json_array_append_new(js_flowvars, js_flowvar);
} else if (fv->datatype == FLOWVAR_TYPE_INT) {
const char *varname = VarNameStoreLookupById(fv->idx,
VAR_TYPE_FLOW_INT);
if (varname) {
if (js_flowints == NULL) {
js_flowints = json_object();
if (js_flowints == NULL)
break;
}
json_object_set_new(js_flowints, varname,
json_integer(fv->data.fv_int.value));
}
}
} else if (gv->type == DETECT_FLOWBITS) {
FlowBit *fb = (FlowBit *)gv;
const char *varname = VarNameStoreLookupById(fb->idx,
VAR_TYPE_FLOW_BIT);
if (varname) {
if (SCStringHasPrefix(varname, TRAFFIC_ID_PREFIX)) {
if (js_traffic_id == NULL) {
js_traffic_id = json_array();
if (unlikely(js_traffic_id == NULL)) {
break;
}
}
json_array_append_new(js_traffic_id,
json_string(&varname[traffic_id_prefix_len]));
} else if (SCStringHasPrefix(varname, TRAFFIC_LABEL_PREFIX)) {
if (js_traffic_label == NULL) {
js_traffic_label = json_array();
if (unlikely(js_traffic_label == NULL)) {
break;
}
}
json_array_append_new(js_traffic_label,
json_string(&varname[traffic_label_prefix_len]));
} else {
if (js_flowbits == NULL) {
js_flowbits = json_array();
if (unlikely(js_flowbits == NULL))
break;
}
json_array_append_new(js_flowbits, json_string(varname));
}
}
}
gv = gv->next;
}
if (js_flowbits) {
json_object_set_new(js_root, "flowbits", js_flowbits);
}
if (js_flowints) {
json_object_set_new(js_root, "flowints", js_flowints);
}
if (js_flowvars) {
json_object_set_new(js_root, "flowvars", js_flowvars);
}
if (js_traffic_id != NULL || js_traffic_label != NULL) {
*js_traffic = json_object();
if (likely(*js_traffic != NULL)) {
if (js_traffic_id != NULL) {
json_object_set_new(*js_traffic, "id", js_traffic_id);
}
if (js_traffic_label != NULL) {
json_object_set_new(*js_traffic, "label", js_traffic_label);
}
}
}
}
/**
* \brief Add top-level metadata to the eve json object.
*/
static void JsonAddMetadata(const Packet *p, const Flow *f, json_t *js)
{
if ((p && p->pktvar) || (f && f->flowvar)) {
json_t *js_vars = json_object();
json_t *js_traffic = NULL;
if (js_vars) {
if (f && f->flowvar) {
JsonAddFlowVars(f, js_vars, &js_traffic);
if (js_traffic != NULL) {
json_object_set_new(js, "traffic", js_traffic);
}
}
if (p && p->pktvar) {
JsonAddPacketvars(p, js_vars);
}
json_object_set_new(js, "metadata", js_vars);
}
}
}
void JsonAddCommonOptions(const OutputJsonCommonSettings *cfg,
const Packet *p, const Flow *f, json_t *js)
{
if (cfg->include_metadata) {
JsonAddMetadata(p, f, js);
}
if (cfg->include_community_id && f != NULL) {
CreateJSONCommunityFlowId(js, f, cfg->community_id_seed);
}
}
/**
* \brief Jsonify a packet
*
* \param p Packet
* \param js JSON object
* \param max_length If non-zero, restricts the number of packet data bytes handled.
*/
void JsonPacket(const Packet *p, json_t *js, unsigned long max_length)
{
unsigned long max_len = max_length == 0 ? GET_PKT_LEN(p) : max_length;
unsigned long len = 2 * max_len;
uint8_t encoded_packet[len];
if (Base64Encode((unsigned char*) GET_PKT_DATA(p), max_len, encoded_packet, &len) == SC_BASE64_OK) {
json_object_set_new(js, "packet", json_string((char *)encoded_packet));
}
/* Create packet info. */
json_t *packetinfo_js = json_object();
if (unlikely(packetinfo_js == NULL)) {
return;
}
json_object_set_new(packetinfo_js, "linktype", json_integer(p->datalink));
json_object_set_new(js, "packet_info", packetinfo_js);
}
/** \brief jsonify tcp flags field
* Only add 'true' fields in an attempt to keep things reasonably compact.
*/
void JsonTcpFlags(uint8_t flags, json_t *js)
{
if (flags & TH_SYN)
json_object_set_new(js, "syn", json_true());
if (flags & TH_FIN)
json_object_set_new(js, "fin", json_true());
if (flags & TH_RST)
json_object_set_new(js, "rst", json_true());
if (flags & TH_PUSH)
json_object_set_new(js, "psh", json_true());
if (flags & TH_ACK)
json_object_set_new(js, "ack", json_true());
if (flags & TH_URG)
json_object_set_new(js, "urg", json_true());
if (flags & TH_ECN)
json_object_set_new(js, "ecn", json_true());
if (flags & TH_CWR)
json_object_set_new(js, "cwr", json_true());
}
/**
* \brief Add five tuple from packet to JSON object
*
* \param p Packet
* \param dir log direction (packet or flow)
* \param js JSON object
*/
void JsonFiveTuple(const Packet *p, enum OutputJsonLogDirection dir, json_t *js)
{
char srcip[46] = {0}, dstip[46] = {0};
Port sp, dp;
char proto[16];
switch (dir) {
case LOG_DIR_PACKET:
if (PKT_IS_IPV4(p)) {
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p),
dstip, sizeof(dstip));
} else if (PKT_IS_IPV6(p)) {
PrintInet(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p),
dstip, sizeof(dstip));
} else {
/* Not an IP packet so don't do anything */
return;
}
sp = p->sp;
dp = p->dp;
break;
case LOG_DIR_FLOW:
case LOG_DIR_FLOW_TOSERVER:
if ((PKT_IS_TOSERVER(p))) {
if (PKT_IS_IPV4(p)) {
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p),
dstip, sizeof(dstip));
} else if (PKT_IS_IPV6(p)) {
PrintInet(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p),
dstip, sizeof(dstip));
}
sp = p->sp;
dp = p->dp;
} else {
if (PKT_IS_IPV4(p)) {
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p),
dstip, sizeof(dstip));
} else if (PKT_IS_IPV6(p)) {
PrintInet(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p),
dstip, sizeof(dstip));
}
sp = p->dp;
dp = p->sp;
}
break;
case LOG_DIR_FLOW_TOCLIENT:
if ((PKT_IS_TOCLIENT(p))) {
if (PKT_IS_IPV4(p)) {
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p),
dstip, sizeof(dstip));
} else if (PKT_IS_IPV6(p)) {
PrintInet(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p),
dstip, sizeof(dstip));
}
sp = p->sp;
dp = p->dp;
} else {
if (PKT_IS_IPV4(p)) {
PrintInet(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p),
dstip, sizeof(dstip));
} else if (PKT_IS_IPV6(p)) {
PrintInet(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p),
srcip, sizeof(srcip));
PrintInet(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p),
dstip, sizeof(dstip));
}
sp = p->dp;
dp = p->sp;
}
break;
default:
DEBUG_VALIDATE_BUG_ON(1);
return;
}
if (SCProtoNameValid(IP_GET_IPPROTO(p)) == TRUE) {
strlcpy(proto, known_proto[IP_GET_IPPROTO(p)], sizeof(proto));
} else {
snprintf(proto, sizeof(proto), "%03" PRIu32, IP_GET_IPPROTO(p));
}
json_object_set_new(js, "src_ip", json_string(srcip));
switch(p->proto) {
case IPPROTO_ICMP:
break;
case IPPROTO_UDP:
case IPPROTO_TCP:
case IPPROTO_SCTP:
json_object_set_new(js, "src_port", json_integer(sp));
break;
}
json_object_set_new(js, "dest_ip", json_string(dstip));
switch(p->proto) {
case IPPROTO_ICMP:
break;
case IPPROTO_UDP:
case IPPROTO_TCP:
case IPPROTO_SCTP:
json_object_set_new(js, "dest_port", json_integer(dp));
break;
}
json_object_set_new(js, "proto", json_string(proto));
}
static void CreateJSONCommunityFlowIdv4(json_t *js, const Flow *f,
const uint16_t seed)
{
struct {
uint16_t seed;
uint32_t src;
uint32_t dst;
uint8_t proto;
uint8_t pad0;
uint16_t sp;
uint16_t dp;
} __attribute__((__packed__)) ipv4;
uint32_t src = f->src.addr_data32[0];
uint32_t dst = f->dst.addr_data32[0];
uint16_t sp = f->sp;
if (f->proto == IPPROTO_ICMP)
sp = f->icmp_s.type;
sp = htons(sp);
uint16_t dp = f->dp;
if (f->proto == IPPROTO_ICMP)
dp = f->icmp_d.type;
dp = htons(dp);
ipv4.seed = htons(seed);
if (ntohl(src) < ntohl(dst) || (src == dst && sp < dp)) {
ipv4.src = src;
ipv4.dst = dst;
ipv4.sp = sp;
ipv4.dp = dp;
} else {
ipv4.src = dst;
ipv4.dst = src;
ipv4.sp = dp;
ipv4.dp = sp;
}
ipv4.proto = f->proto;
ipv4.pad0 = 0;
uint8_t hash[20];
if (ComputeSHA1((const uint8_t *)&ipv4, sizeof(ipv4), hash, sizeof(hash)) == 1) {
unsigned char base64buf[64] = "1:";
unsigned long out_len = sizeof(base64buf) - 2;
if (Base64Encode(hash, sizeof(hash), base64buf+2, &out_len) == SC_BASE64_OK) {
json_object_set_new(js, "community_id", json_string((const char *)base64buf));
}
}
}
static inline bool FlowHashRawAddressIPv6LtU32(const uint32_t *a, const uint32_t *b)
{
for (int i = 0; i < 4; i++) {
if (a[i] < b[i])
return true;
if (a[i] > b[i])
break;
}
return false;
}
static void CreateJSONCommunityFlowIdv6(json_t *js, const Flow *f,
const uint16_t seed)
{
struct {
uint16_t seed;
uint32_t src[4];
uint32_t dst[4];
uint8_t proto;
uint8_t pad0;
uint16_t sp;
uint16_t dp;
} __attribute__((__packed__)) ipv6;
uint16_t sp = f->sp;
if (f->proto == IPPROTO_ICMPV6)
sp = f->icmp_s.type;
sp = htons(sp);
uint16_t dp = f->dp;
if (f->proto == IPPROTO_ICMPV6)
dp = f->icmp_d.type;
dp = htons(dp);
ipv6.seed = htons(seed);
if (FlowHashRawAddressIPv6LtU32(f->src.addr_data32, f->dst.addr_data32) ||
((memcmp(&f->src, &f->dst, sizeof(f->src)) == 0) && sp < dp))
{
memcpy(&ipv6.src, &f->src.addr_data32, 16);
memcpy(&ipv6.dst, &f->dst.addr_data32, 16);
ipv6.sp = sp;
ipv6.dp = dp;
} else {
memcpy(&ipv6.src, &f->dst.addr_data32, 16);
memcpy(&ipv6.dst, &f->src.addr_data32, 16);
ipv6.sp = dp;
ipv6.dp = sp;
}
ipv6.proto = f->proto;
ipv6.pad0 = 0;
uint8_t hash[20];
if (ComputeSHA1((const uint8_t *)&ipv6, sizeof(ipv6), hash, sizeof(hash)) == 1) {
unsigned char base64buf[64] = "1:";
unsigned long out_len = sizeof(base64buf) - 2;
if (Base64Encode(hash, sizeof(hash), base64buf+2, &out_len) == SC_BASE64_OK) {
json_object_set_new(js, "community_id", json_string((const char *)base64buf));
}
}
}
static void CreateJSONCommunityFlowId(json_t *js, const Flow *f, const uint16_t seed)
{
if (f->flags & FLOW_IPV4)
return CreateJSONCommunityFlowIdv4(js, f, seed);
else if (f->flags & FLOW_IPV6)
return CreateJSONCommunityFlowIdv6(js, f, seed);
}
void CreateJSONFlowId(json_t *js, const Flow *f)
{
if (f == NULL)
return;
int64_t flow_id = FlowGetId(f);
json_object_set_new(js, "flow_id", json_integer(flow_id));
if (f->parent_id) {
json_object_set_new(js, "parent_id", json_integer(f->parent_id));
}
}
json_t *CreateJSONHeader(const Packet *p, enum OutputJsonLogDirection dir,
const char *event_type)
{
char timebuf[64];
const Flow *f = (const Flow *)p->flow;
json_t *js = json_object();
if (unlikely(js == NULL))
return NULL;
CreateIsoTimeString(&p->ts, timebuf, sizeof(timebuf));
/* time & tx */
json_object_set_new(js, "timestamp", json_string(timebuf));
CreateJSONFlowId(js, f);
/* sensor id */
if (sensor_id >= 0)
json_object_set_new(js, "sensor_id", json_integer(sensor_id));
/* input interface */
if (p->livedev) {
json_object_set_new(js, "in_iface", json_string(p->livedev->dev));
}
/* pcap_cnt */
if (p->pcap_cnt != 0) {
json_object_set_new(js, "pcap_cnt", json_integer(p->pcap_cnt));
}
if (event_type) {
json_object_set_new(js, "event_type", json_string(event_type));
}
/* vlan */
if (p->vlan_idx > 0) {
json_t *js_vlan = json_array();
if (js_vlan) {
json_array_append_new(js_vlan, json_integer(p->vlan_id[0]));
if (p->vlan_idx > 1) {
json_array_append_new(js_vlan, json_integer(p->vlan_id[1]));
}
json_object_set_new(js, "vlan", js_vlan);
}
}
/* mpls */
if (p->mpls_idx > 0) {
json_t *js_mpls;
js_mpls = json_array();
if (likely(js_mpls != NULL)) {
for (uint8_t i = 0; i < p->mpls_idx; i++) {
json_array_append_new(js_mpls, json_integer(p->mpls_id[i]));
}
json_object_set_new(js, "mpls", js_mpls);
}
}
/* 5-tuple */
JsonFiveTuple(p, dir, js);
/* icmp */
switch (p->proto) {
case IPPROTO_ICMP:
if (p->icmpv4h) {
json_object_set_new(js, "icmp_type",
json_integer(p->icmpv4h->type));
json_object_set_new(js, "icmp_code",
json_integer(p->icmpv4h->code));
}
break;
case IPPROTO_ICMPV6:
if (p->icmpv6h) {
json_object_set_new(js, "icmp_type",
json_integer(p->icmpv6h->type));
json_object_set_new(js, "icmp_code",
json_integer(p->icmpv6h->code));
}
break;
}
return js;
}
json_t *CreateJSONHeaderWithTxId(const Packet *p, enum OutputJsonLogDirection dir,
const char *event_type, uint64_t tx_id)
{
json_t *js = CreateJSONHeader(p, dir, event_type);
if (unlikely(js == NULL))
return NULL;
/* tx id for correlation with other events */
json_object_set_new(js, "tx_id", json_integer(tx_id));
return js;
}
int OutputJSONMemBufferCallback(const char *str, size_t size, void *data)
{
OutputJSONMemBufferWrapper *wrapper = data;
MemBuffer **memb = wrapper->buffer;
if (MEMBUFFER_OFFSET(*memb) + size >= MEMBUFFER_SIZE(*memb)) {
MemBufferExpand(memb, wrapper->expand_by);
}
MemBufferWriteRaw((*memb), str, size);
return 0;
}
int OutputJSONBuffer(json_t *js, LogFileCtx *file_ctx, MemBuffer **buffer)
{
if (file_ctx->sensor_name) {
json_object_set_new(js, "host",
json_string(file_ctx->sensor_name));
}
if (file_ctx->is_pcap_offline) {
json_object_set_new(js, "pcap_filename", json_string(PcapFileGetFilename()));
}
if (file_ctx->prefix) {
MemBufferWriteRaw((*buffer), file_ctx->prefix, file_ctx->prefix_len);
}
OutputJSONMemBufferWrapper wrapper = {
.buffer = buffer,
.expand_by = JSON_OUTPUT_BUFFER_SIZE
};
int r = json_dump_callback(js, OutputJSONMemBufferCallback, &wrapper,
file_ctx->json_flags);
if (r != 0)
return TM_ECODE_OK;
LogFileWrite(file_ctx, *buffer);
return 0;
}
/**
* \brief Create a new LogFileCtx for "fast" output style.
* \param conf The configuration node for this output.
* \return A LogFileCtx pointer on success, NULL on failure.
*/
OutputInitResult OutputJsonInitCtx(ConfNode *conf)
{
OutputInitResult result = { NULL, false };
OutputJsonCtx *json_ctx = SCCalloc(1, sizeof(OutputJsonCtx));
if (unlikely(json_ctx == NULL)) {
SCLogDebug("could not create new OutputJsonCtx");
return result;
}
/* First lookup a sensor-name value in this outputs configuration
* node (deprecated). If that fails, lookup the global one. */
const char *sensor_name = ConfNodeLookupChildValue(conf, "sensor-name");
if (sensor_name != NULL) {
SCLogWarning(SC_ERR_DEPRECATED_CONF,
"Found deprecated eve-log setting \"sensor-name\". "
"Please set sensor-name globally.");
}
else {
(void)ConfGet("sensor-name", &sensor_name);
}
json_ctx->file_ctx = LogFileNewCtx();
if (unlikely(json_ctx->file_ctx == NULL)) {
SCLogDebug("AlertJsonInitCtx: Could not create new LogFileCtx");
SCFree(json_ctx);
return result;
}
if (sensor_name) {
json_ctx->file_ctx->sensor_name = SCStrdup(sensor_name);
if (json_ctx->file_ctx->sensor_name == NULL) {
LogFileFreeCtx(json_ctx->file_ctx);
SCFree(json_ctx);
return result;
}
} else {
json_ctx->file_ctx->sensor_name = NULL;
}
OutputCtx *output_ctx = SCCalloc(1, sizeof(OutputCtx));
if (unlikely(output_ctx == NULL)) {
LogFileFreeCtx(json_ctx->file_ctx);
SCFree(json_ctx);
return result;
}
output_ctx->data = json_ctx;
output_ctx->DeInit = OutputJsonDeInitCtx;
if (conf) {
const char *output_s = ConfNodeLookupChildValue(conf, "filetype");
// Backwards compatibility
if (output_s == NULL) {
output_s = ConfNodeLookupChildValue(conf, "type");
}
if (output_s != NULL) {
if (strcmp(output_s, "file") == 0 ||
strcmp(output_s, "regular") == 0) {
json_ctx->json_out = LOGFILE_TYPE_FILE;
} else if (strcmp(output_s, "syslog") == 0) {
json_ctx->json_out = LOGFILE_TYPE_SYSLOG;
} else if (strcmp(output_s, "unix_dgram") == 0) {
json_ctx->json_out = LOGFILE_TYPE_UNIX_DGRAM;
} else if (strcmp(output_s, "unix_stream") == 0) {
json_ctx->json_out = LOGFILE_TYPE_UNIX_STREAM;
} else if (strcmp(output_s, "redis") == 0) {
#ifdef HAVE_LIBHIREDIS
SCLogRedisInit();
json_ctx->json_out = LOGFILE_TYPE_REDIS;
#else
SCLogError(SC_ERR_INVALID_ARGUMENT,
"redis JSON output option is not compiled");
exit(EXIT_FAILURE);
#endif
} else {
SCLogError(SC_ERR_INVALID_ARGUMENT,
"Invalid JSON output option: %s", output_s);
exit(EXIT_FAILURE);
}
}
const char *prefix = ConfNodeLookupChildValue(conf, "prefix");
if (prefix != NULL)
{
SCLogInfo("Using prefix '%s' for JSON messages", prefix);
json_ctx->file_ctx->prefix = SCStrdup(prefix);
if (json_ctx->file_ctx->prefix == NULL)
{
SCLogError(SC_ERR_MEM_ALLOC,
"Failed to allocate memory for eve-log.prefix setting.");
exit(EXIT_FAILURE);
}
json_ctx->file_ctx->prefix_len = strlen(prefix);
}
if (json_ctx->json_out == LOGFILE_TYPE_FILE ||
json_ctx->json_out == LOGFILE_TYPE_UNIX_DGRAM ||
json_ctx->json_out == LOGFILE_TYPE_UNIX_STREAM)
{
if (SCConfLogOpenGeneric(conf, json_ctx->file_ctx, DEFAULT_LOG_FILENAME, 1) < 0) {
LogFileFreeCtx(json_ctx->file_ctx);
SCFree(json_ctx);
SCFree(output_ctx);
return result;
}
OutputRegisterFileRotationFlag(&json_ctx->file_ctx->rotation_flag);
}
#ifndef OS_WIN32
else if (json_ctx->json_out == LOGFILE_TYPE_SYSLOG) {
const char *facility_s = ConfNodeLookupChildValue(conf, "facility");
if (facility_s == NULL) {
facility_s = DEFAULT_ALERT_SYSLOG_FACILITY_STR;
}
int facility = SCMapEnumNameToValue(facility_s, SCSyslogGetFacilityMap());
if (facility == -1) {
SCLogWarning(SC_ERR_INVALID_ARGUMENT, "Invalid syslog facility: \"%s\","
" now using \"%s\" as syslog facility", facility_s,
DEFAULT_ALERT_SYSLOG_FACILITY_STR);
facility = DEFAULT_ALERT_SYSLOG_FACILITY;
}
const char *level_s = ConfNodeLookupChildValue(conf, "level");
if (level_s != NULL) {
int level = SCMapEnumNameToValue(level_s, SCSyslogGetLogLevelMap());
if (level != -1) {
json_ctx->file_ctx->syslog_setup.alert_syslog_level = level;
}
}
const char *ident = ConfNodeLookupChildValue(conf, "identity");
/* if null we just pass that to openlog, which will then
* figure it out by itself. */
openlog(ident, LOG_PID|LOG_NDELAY, facility);
}
#endif
#ifdef HAVE_LIBHIREDIS
else if (json_ctx->json_out == LOGFILE_TYPE_REDIS) {
ConfNode *redis_node = ConfNodeLookupChild(conf, "redis");
if (!json_ctx->file_ctx->sensor_name) {
char hostname[1024];