suricata
detect.c
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1 /* Copyright (C) 2007-2025 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  * \file
20  *
21  * \author Victor Julien <victor@inliniac.net>
22  *
23  * Basic detection engine
24  */
25 
26 #include "suricata-common.h"
27 #include "suricata.h"
28 
29 #include "decode.h"
30 #include "packet.h"
31 #include "flow.h"
32 #include "stream-tcp.h"
33 #include "app-layer.h"
34 #include "app-layer-parser.h"
35 #include "app-layer-frames.h"
36 
37 #include "detect.h"
38 #include "detect-dsize.h"
39 #include "detect-engine.h"
40 #include "detect-engine-build.h"
41 #include "detect-engine-frame.h"
42 #include "detect-engine-profile.h"
43 
44 #include "detect-engine-alert.h"
45 #include "detect-engine-siggroup.h"
46 #include "detect-engine-address.h"
47 #include "detect-engine-proto.h"
48 #include "detect-engine-port.h"
49 #include "detect-engine-mpm.h"
50 #include "detect-engine-iponly.h"
53 #include "detect-engine-state.h"
54 #include "detect-engine-analyzer.h"
55 
56 #include "detect-engine-payload.h"
57 #include "detect-engine-event.h"
58 
59 #include "detect-filestore.h"
60 #include "detect-flowvar.h"
61 #include "detect-replace.h"
62 
63 #include "util-validate.h"
64 #include "util-detect.h"
65 #include "util-profiling.h"
66 
67 #include "action-globals.h"
68 
69 typedef struct DetectRunScratchpad {
71  const uint8_t flow_flags; /* flow/state flags: STREAM_* */
72  const bool app_decoder_events;
73  /**
74  * Either ACTION_DROP (drop:packet) or ACTION_ACCEPT (accept:hook)
75  *
76  * ACTION_DROP means the default policy of drop:packet is applied
77  * ACTION_ACCEPT means the default policy of accept:hook is applied
78  */
79  const uint8_t default_action;
80  const SigGroupHead *sgh;
82 
83 /* prototypes */
84 static DetectRunScratchpad DetectRunSetup(const DetectEngineCtx *de_ctx,
85  DetectEngineThreadCtx *det_ctx, Packet *const p, Flow *const pflow,
86  const uint8_t default_action);
87 static void DetectRunInspectIPOnly(ThreadVars *tv, const DetectEngineCtx *de_ctx,
88  DetectEngineThreadCtx *det_ctx, Flow * const pflow, Packet * const p);
89 static inline void DetectRunGetRuleGroup(const DetectEngineCtx *de_ctx,
90  Packet * const p, Flow * const pflow, DetectRunScratchpad *scratch);
91 static inline void DetectRunPrefilterPkt(ThreadVars *tv, const DetectEngineCtx *de_ctx,
92  DetectEngineThreadCtx *det_ctx, Packet *p, DetectRunScratchpad *scratch);
93 static inline uint8_t DetectRulePacketRules(ThreadVars *const tv,
94  const DetectEngineCtx *const de_ctx, DetectEngineThreadCtx *const det_ctx, Packet *const p,
95  Flow *const pflow, const DetectRunScratchpad *scratch);
96 static void DetectRunTx(ThreadVars *tv, DetectEngineCtx *de_ctx,
97  DetectEngineThreadCtx *det_ctx, Packet *p,
98  Flow *f, DetectRunScratchpad *scratch);
99 static void DetectRunFrames(ThreadVars *tv, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
100  Packet *p, Flow *f, DetectRunScratchpad *scratch);
101 static inline void DetectRunPostRules(ThreadVars *tv, const DetectEngineCtx *de_ctx,
102  DetectEngineThreadCtx *det_ctx, Packet *const p, Flow *const pflow,
103  DetectRunScratchpad *scratch);
104 static void DetectRunCleanup(DetectEngineThreadCtx *det_ctx,
105  Packet *p, Flow * const pflow);
106 static inline void DetectRunAppendDefaultAccept(DetectEngineThreadCtx *det_ctx, Packet *p);
107 
108 /** \internal
109  */
110 static void DetectRun(ThreadVars *th_v,
112  Packet *p)
113 {
114  SCEnter();
115  SCLogDebug("p->pcap_cnt %" PRIu64 " direction %s pkt_src %s", p->pcap_cnt,
116  p->flow ? (FlowGetPacketDirection(p->flow, p) == TOSERVER ? "toserver" : "toclient")
117  : "noflow",
118  PktSrcToString(p->pkt_src));
119 
120  /* Load the Packet's flow early, even though it might not be needed.
121  * Mark as a constant pointer, although the flow itself can change. */
122  Flow * const pflow = p->flow;
123 
124  DetectRunScratchpad scratch = DetectRunSetup(de_ctx, det_ctx, p, pflow, ACTION_DROP);
125 
126  /* run the IPonly engine */
127  DetectRunInspectIPOnly(th_v, de_ctx, det_ctx, pflow, p);
128 
129  /* get our rule group */
130  DetectRunGetRuleGroup(de_ctx, p, pflow, &scratch);
131  /* if we didn't get a sig group head, we
132  * have nothing to do.... */
133  if (scratch.sgh == NULL) {
134  SCLogDebug("no sgh for this packet, nothing to match against");
135  goto end;
136  }
137 
138  /* run the prefilters for packets */
139  DetectRunPrefilterPkt(th_v, de_ctx, det_ctx, p, &scratch);
140 
142  /* inspect the rules against the packet */
143  const uint8_t pkt_policy = DetectRulePacketRules(th_v, de_ctx, det_ctx, p, pflow, &scratch);
145 
146  /* Only FW rules will already have set the action, IDS rules go through PacketAlertFinalize
147  *
148  * If rules told us to drop or accept:packet/accept:flow, we skip app_filter and app_td.
149  *
150  * accept:hook won't have set the pkt_policy, so we simply continue.
151  *
152  * TODO what about app state progression, cleanup and such? */
153  if (pkt_policy & (ACTION_DROP | ACTION_ACCEPT)) {
154  goto end;
155  }
156 
157  /* run tx/state inspection. Don't call for ICMP error msgs. */
158  if (pflow && pflow->alstate && likely(pflow->proto == p->proto)) {
159  if (p->proto == IPPROTO_TCP) {
160  if ((p->flags & PKT_STREAM_EST) == 0) {
161  SCLogDebug("packet %" PRIu64 ": skip tcp non-established", p->pcap_cnt);
162  DetectRunAppendDefaultAccept(det_ctx, p);
163  goto end;
164  }
165  const TcpSession *ssn = p->flow->protoctx;
166  bool setting_nopayload = p->flow->alparser &&
170  // we may be right after disabling app-layer (ssh)
171  if (ssn &&
172  ((ssn->flags & STREAMTCP_FLAG_APP_LAYER_DISABLED) == 0 || setting_nopayload)) {
173  // PACKET_PROFILING_DETECT_START(p, PROF_DETECT_TX);
174  DetectRunFrames(th_v, de_ctx, det_ctx, p, pflow, &scratch);
175  // PACKET_PROFILING_DETECT_END(p, PROF_DETECT_TX);
176  }
177  // no update to transactions
178  if (!PKT_IS_PSEUDOPKT(p) && p->app_update_direction == 0 &&
179  ((PKT_IS_TOSERVER(p) && (p->flow->flags & FLOW_TS_APP_UPDATED) == 0) ||
180  (PKT_IS_TOCLIENT(p) && (p->flow->flags & FLOW_TC_APP_UPDATED) == 0))) {
181  SCLogDebug("packet %" PRIu64 ": no app-layer update", p->pcap_cnt);
182  DetectRunAppendDefaultAccept(det_ctx, p);
183  goto end;
184  }
185  } else if (p->proto == IPPROTO_UDP) {
186  DetectRunFrames(th_v, de_ctx, det_ctx, p, pflow, &scratch);
187  }
188 
190  DetectRunTx(th_v, de_ctx, det_ctx, p, pflow, &scratch);
192  /* see if we need to increment the inspect_id and reset the de_state */
195  pflow, pflow->alparser, pflow->alstate, scratch.flow_flags, (scratch.sgh == NULL));
197  } else {
198  SCLogDebug("packet %" PRIu64 ": no flow / app-layer", p->pcap_cnt);
199  DetectRunAppendDefaultAccept(det_ctx, p);
200  }
201 
202 end:
203  DetectRunPostRules(th_v, de_ctx, det_ctx, p, pflow, &scratch);
204 
205  DetectRunCleanup(det_ctx, p, pflow);
206  SCReturn;
207 }
208 
209 /** \internal
210  */
211 static void DetectRunPacketHook(ThreadVars *th_v, const DetectEngineCtx *de_ctx,
212  DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, Packet *p)
213 {
214  SCEnter();
215  SCLogDebug("p->pcap_cnt %" PRIu64 " direction %s pkt_src %s", p->pcap_cnt,
216  p->flow ? (FlowGetPacketDirection(p->flow, p) == TOSERVER ? "toserver" : "toclient")
217  : "noflow",
218  PktSrcToString(p->pkt_src));
219 
220  /* Load the Packet's flow early, even though it might not be needed.
221  * Mark as a constant pointer, although the flow itself can change. */
222  Flow *const pflow = p->flow;
223 
224  DetectRunScratchpad scratch = DetectRunSetup(de_ctx, det_ctx, p, pflow, ACTION_ACCEPT);
225  scratch.sgh = sgh;
226 
227  /* if we didn't get a sig group head, we
228  * have nothing to do.... */
229  if (scratch.sgh == NULL) {
230  SCLogDebug("no sgh for this packet, nothing to match against");
231  goto end;
232  }
233 
234  /* run the prefilters for packets */
235  DetectRunPrefilterPkt(th_v, de_ctx, det_ctx, p, &scratch);
236 
237  // PACKET_PROFILING_DETECT_START(p, PROF_DETECT_RULES); // TODO
238  /* inspect the rules against the packet */
239  const uint8_t pkt_policy = DetectRulePacketRules(th_v, de_ctx, det_ctx, p, pflow, &scratch);
240  // PACKET_PROFILING_DETECT_END(p, PROF_DETECT_RULES);
241  if (pkt_policy & (ACTION_DROP | ACTION_ACCEPT)) {
242  goto end;
243  }
244 
245 end:
246  DetectRunPostRules(th_v, de_ctx, det_ctx, p, pflow, &scratch);
247 
248  DetectRunCleanup(det_ctx, p, pflow);
249  SCReturn;
250 }
251 
252 static void DetectRunPostMatch(ThreadVars *tv,
253  DetectEngineThreadCtx *det_ctx, Packet *p,
254  const Signature *s)
255 {
256  /* run the packet match functions */
258  if (smd != NULL) {
260 
261  SCLogDebug("running match functions, sm %p", smd);
262 
263  while (1) {
265  (void)sigmatch_table[smd->type].Match(det_ctx, p, s, smd->ctx);
266  KEYWORD_PROFILING_END(det_ctx, smd->type, 1);
267  if (smd->is_last)
268  break;
269  smd++;
270  }
271  }
272 }
273 
274 /**
275  * \brief Get the SigGroupHead for a packet.
276  *
277  * \param de_ctx detection engine context
278  * \param p packet
279  *
280  * \retval sgh the SigGroupHead or NULL if non applies to the packet
281  */
283  const Packet *p)
284 {
285  SCEnter();
286  SigGroupHead *sgh = NULL;
287 
288  /* if the packet proto is 0 (not set), we're inspecting it against
289  * the decoder events sgh we have. */
290  if (p->proto == 0 && p->events.cnt > 0) {
291  SCReturnPtr(de_ctx->decoder_event_sgh, "SigGroupHead");
292  } else if (p->proto == 0) {
293  if (!(PacketIsIPv4(p) || PacketIsIPv6(p))) {
294  /* not IP, so nothing to do */
295  SCReturnPtr(NULL, "SigGroupHead");
296  }
297  }
298 
299  /* select the flow_gh */
300  const int dir = (p->flowflags & FLOW_PKT_TOCLIENT) == 0;
301 
302  int proto = PacketGetIPProto(p);
303  if (proto == IPPROTO_TCP) {
304  DetectPort *list = de_ctx->flow_gh[dir].tcp;
305  SCLogDebug("tcp toserver %p, tcp toclient %p: going to use %p", de_ctx->flow_gh[1].tcp,
306  de_ctx->flow_gh[0].tcp, de_ctx->flow_gh[dir].tcp);
307  const uint16_t port = dir ? p->dp : p->sp;
308  SCLogDebug("tcp port %u -> %u:%u", port, p->sp, p->dp);
309  DetectPort *sghport = DetectPortLookupGroup(list, port);
310  if (sghport != NULL)
311  sgh = sghport->sh;
312  SCLogDebug("TCP list %p, port %u, direction %s, sghport %p, sgh %p", list, port,
313  dir ? "toserver" : "toclient", sghport, sgh);
314  } else if (proto == IPPROTO_UDP) {
315  DetectPort *list = de_ctx->flow_gh[dir].udp;
316  uint16_t port = dir ? p->dp : p->sp;
317  DetectPort *sghport = DetectPortLookupGroup(list, port);
318  if (sghport != NULL)
319  sgh = sghport->sh;
320  SCLogDebug("UDP list %p, port %u, direction %s, sghport %p, sgh %p", list, port,
321  dir ? "toserver" : "toclient", sghport, sgh);
322  } else {
323  sgh = de_ctx->flow_gh[dir].sgh[proto];
324  }
325 
326  SCReturnPtr(sgh, "SigGroupHead");
327 }
328 
329 static inline void DetectPrefilterCopyDeDup(
331 {
332  SigIntId *pf_ptr = det_ctx->pmq.rule_id_array;
333  uint32_t final_cnt = det_ctx->pmq.rule_id_array_cnt;
334  Signature **sig_array = de_ctx->sig_array;
335  Signature **match_array = det_ctx->match_array;
336  SigIntId previous_id = (SigIntId)-1;
337  while (final_cnt-- > 0) {
338  SigIntId id = *pf_ptr++;
339  Signature *s = sig_array[id];
340 
341  /* As the prefilter list can contain duplicates, check for that here. */
342  if (likely(id != previous_id)) {
343  *match_array++ = s;
344  previous_id = id;
345  }
346  }
347 
348  det_ctx->match_array_cnt = (uint32_t)(match_array - det_ctx->match_array);
350  PMQ_RESET(&det_ctx->pmq);
351 }
352 
353 /** \internal
354  * \brief update flow's file tracking flags based on the detection engine
355  * A set of flags is prepared that is sent to the File API. The
356  File API may reject one or more based on the global force settings.
357  */
358 static inline void
359 DetectPostInspectFileFlagsUpdate(Flow *f, const SigGroupHead *sgh, uint8_t direction)
360 {
361  uint16_t flow_file_flags = FLOWFILE_INIT;
362 
363  if (sgh == NULL) {
364  SCLogDebug("requesting disabling all file features for flow");
365  flow_file_flags = FLOWFILE_NONE;
366  } else {
367  if (sgh->filestore_cnt == 0) {
368  SCLogDebug("requesting disabling filestore for flow");
369  flow_file_flags |= (FLOWFILE_NO_STORE_TS|FLOWFILE_NO_STORE_TC);
370  }
371 #ifdef HAVE_MAGIC
372  if (!(sgh->flags & SIG_GROUP_HEAD_HAVEFILEMAGIC)) {
373  SCLogDebug("requesting disabling magic for flow");
374  flow_file_flags |= (FLOWFILE_NO_MAGIC_TS|FLOWFILE_NO_MAGIC_TC);
375  }
376 #endif
377  if (!(sgh->flags & SIG_GROUP_HEAD_HAVEFILEMD5)) {
378  SCLogDebug("requesting disabling md5 for flow");
379  flow_file_flags |= (FLOWFILE_NO_MD5_TS|FLOWFILE_NO_MD5_TC);
380  }
381  if (!(sgh->flags & SIG_GROUP_HEAD_HAVEFILESHA1)) {
382  SCLogDebug("requesting disabling sha1 for flow");
383  flow_file_flags |= (FLOWFILE_NO_SHA1_TS|FLOWFILE_NO_SHA1_TC);
384  }
385  if (!(sgh->flags & SIG_GROUP_HEAD_HAVEFILESHA256)) {
386  SCLogDebug("requesting disabling sha256 for flow");
387  flow_file_flags |= (FLOWFILE_NO_SHA256_TS|FLOWFILE_NO_SHA256_TC);
388  }
389  if (!(sgh->flags & SIG_GROUP_HEAD_HAVEFILESIZE)) {
390  SCLogDebug("requesting disabling filesize for flow");
391  flow_file_flags |= (FLOWFILE_NO_SIZE_TS|FLOWFILE_NO_SIZE_TC);
392  }
393  }
394  if (flow_file_flags != 0) {
395  FileUpdateFlowFileFlags(f, flow_file_flags, direction);
396  }
397 }
398 
399 static inline void
400 DetectRunPostGetFirstRuleGroup(const Packet *p, Flow *pflow, const SigGroupHead *sgh)
401 {
402  if ((p->flowflags & FLOW_PKT_TOSERVER) && !(pflow->flags & FLOW_SGH_TOSERVER)) {
403  /* first time we see this toserver sgh, store it */
404  pflow->sgh_toserver = sgh;
405  pflow->flags |= FLOW_SGH_TOSERVER;
406 
407  if (p->proto == IPPROTO_TCP && (sgh == NULL || !(sgh->flags & SIG_GROUP_HEAD_HAVERAWSTREAM))) {
408  if (pflow->protoctx != NULL) {
409  TcpSession *ssn = pflow->protoctx;
410  SCLogDebug("STREAMTCP_STREAM_FLAG_DISABLE_RAW ssn.client");
412  }
413  }
414 
415  DetectPostInspectFileFlagsUpdate(pflow,
416  pflow->sgh_toserver, STREAM_TOSERVER);
417 
418  } else if ((p->flowflags & FLOW_PKT_TOCLIENT) && !(pflow->flags & FLOW_SGH_TOCLIENT)) {
419  pflow->sgh_toclient = sgh;
420  pflow->flags |= FLOW_SGH_TOCLIENT;
421 
422  if (p->proto == IPPROTO_TCP && (sgh == NULL || !(sgh->flags & SIG_GROUP_HEAD_HAVERAWSTREAM))) {
423  if (pflow->protoctx != NULL) {
424  TcpSession *ssn = pflow->protoctx;
425  SCLogDebug("STREAMTCP_STREAM_FLAG_DISABLE_RAW ssn.server");
427  }
428  }
429 
430  DetectPostInspectFileFlagsUpdate(pflow,
431  pflow->sgh_toclient, STREAM_TOCLIENT);
432  }
433 }
434 
435 static inline void DetectRunGetRuleGroup(
436  const DetectEngineCtx *de_ctx,
437  Packet * const p, Flow * const pflow,
438  DetectRunScratchpad *scratch)
439 {
440  const SigGroupHead *sgh = NULL;
441 
442  if (pflow) {
443  bool use_flow_sgh = false;
444  /* Get the stored sgh from the flow (if any). Make sure we're not using
445  * the sgh for icmp error packets part of the same stream. */
446  if (PacketGetIPProto(p) == pflow->proto) { /* filter out icmp */
448  if ((p->flowflags & FLOW_PKT_TOSERVER) && (pflow->flags & FLOW_SGH_TOSERVER)) {
449  sgh = pflow->sgh_toserver;
450  SCLogDebug("sgh = pflow->sgh_toserver; => %p", sgh);
451  use_flow_sgh = true;
452  } else if ((p->flowflags & FLOW_PKT_TOCLIENT) && (pflow->flags & FLOW_SGH_TOCLIENT)) {
453  sgh = pflow->sgh_toclient;
454  SCLogDebug("sgh = pflow->sgh_toclient; => %p", sgh);
455  use_flow_sgh = true;
456  }
458  }
459 
460  if (!(use_flow_sgh)) {
464 
465  /* HACK: prevent the wrong sgh (or NULL) from being stored in the
466  * flow's sgh pointers */
467  if (PacketIsICMPv4(p) && ICMPV4_DEST_UNREACH_IS_VALID(p)) {
468  ; /* no-op */
469  } else {
470  /* store the found sgh (or NULL) in the flow to save us
471  * from looking it up again for the next packet.
472  * Also run other tasks */
473  DetectRunPostGetFirstRuleGroup(p, pflow, sgh);
474  }
475  }
476  } else { /* p->flags & PKT_HAS_FLOW */
477  /* no flow */
478 
482  }
483 
484  scratch->sgh = sgh;
485 }
486 
487 static void DetectRunInspectIPOnly(ThreadVars *tv, const DetectEngineCtx *de_ctx,
488  DetectEngineThreadCtx *det_ctx,
489  Flow * const pflow, Packet * const p)
490 {
491  if (pflow) {
493  SCLogDebug("testing against \"ip-only\" signatures");
494 
496  IPOnlyMatchPacket(tv, de_ctx, det_ctx, &de_ctx->io_ctx, p);
498  }
499  } else { /* p->flags & PKT_HAS_FLOW */
500  /* no flow */
501 
502  /* Even without flow we should match the packet src/dst */
504  IPOnlyMatchPacket(tv, de_ctx, det_ctx, &de_ctx->io_ctx, p);
506  }
507 }
508 
509 /** \internal
510  * \brief inspect the rule header: protocol, ports, etc
511  * \retval bool false if no match, true if match */
512 static inline bool DetectRunInspectRuleHeader(const Packet *p, const Flow *f, const Signature *s,
513  const uint32_t sflags, const uint8_t s_proto_flags)
514 {
515  /* check if this signature has a requirement for flowvars of some type
516  * and if so, if we actually have any in the flow. If not, the sig
517  * can't match and we skip it. */
518  if ((p->flags & PKT_HAS_FLOW) && (sflags & SIG_FLAG_REQUIRE_FLOWVAR)) {
519  DEBUG_VALIDATE_BUG_ON(f == NULL);
520 
521  /* no flowvars? skip this sig */
522  const bool fv = f->flowvar != NULL;
523  if (!fv) {
524  SCLogDebug("skipping sig as the flow has no flowvars and sig "
525  "has SIG_FLAG_REQUIRE_FLOWVAR flag set.");
526  return false;
527  }
528  }
529 
530  if ((s_proto_flags & DETECT_PROTO_IPV4) && !PacketIsIPv4(p)) {
531  SCLogDebug("ip version didn't match");
532  return false;
533  }
534  if ((s_proto_flags & DETECT_PROTO_IPV6) && !PacketIsIPv6(p)) {
535  SCLogDebug("ip version didn't match");
536  return false;
537  }
538 
539  if (DetectProtoContainsProto(&s->proto, PacketGetIPProto(p)) == 0) {
540  SCLogDebug("proto didn't match");
541  return false;
542  }
543 
544  /* check the source & dst port in the sig */
545  if (p->proto == IPPROTO_TCP || p->proto == IPPROTO_UDP || p->proto == IPPROTO_SCTP) {
546  if (!(sflags & SIG_FLAG_DP_ANY)) {
547  if (p->flags & PKT_IS_FRAGMENT)
548  return false;
549  const DetectPort *dport = DetectPortLookupGroup(s->dp, p->dp);
550  if (dport == NULL) {
551  SCLogDebug("dport didn't match.");
552  return false;
553  }
554  }
555  if (!(sflags & SIG_FLAG_SP_ANY)) {
556  if (p->flags & PKT_IS_FRAGMENT)
557  return false;
558  const DetectPort *sport = DetectPortLookupGroup(s->sp, p->sp);
559  if (sport == NULL) {
560  SCLogDebug("sport didn't match.");
561  return false;
562  }
563  }
564  } else if ((sflags & (SIG_FLAG_DP_ANY|SIG_FLAG_SP_ANY)) != (SIG_FLAG_DP_ANY|SIG_FLAG_SP_ANY)) {
565  SCLogDebug("port-less protocol and sig needs ports");
566  return false;
567  }
568 
569  /* check the destination address */
570  if (!(sflags & SIG_FLAG_DST_ANY)) {
571  if (PacketIsIPv4(p)) {
573  return false;
574  } else if (PacketIsIPv6(p)) {
576  return false;
577  }
578  }
579  /* check the source address */
580  if (!(sflags & SIG_FLAG_SRC_ANY)) {
581  if (PacketIsIPv4(p)) {
583  return false;
584  } else if (PacketIsIPv6(p)) {
586  return false;
587  }
588  }
589 
590  return true;
591 }
592 
593 /** \internal
594  * \brief run packet/stream prefilter engines
595  */
596 static inline void DetectRunPrefilterPkt(ThreadVars *tv, const DetectEngineCtx *de_ctx,
597  DetectEngineThreadCtx *det_ctx, Packet *p, DetectRunScratchpad *scratch)
598 {
599  /* create our prefilter mask */
600  PacketCreateMask(p, &p->sig_mask, scratch->alproto, scratch->app_decoder_events);
601  /* run the prefilter engines */
602  Prefilter(det_ctx, scratch->sgh, p, scratch->flow_flags, p->sig_mask);
603  /* create match list if we have non-pf and/or pf */
604  if (det_ctx->pmq.rule_id_array_cnt) {
605 #ifdef PROFILING
606  if (tv) {
607  StatsAddUI64(tv, det_ctx->counter_mpm_list, (uint64_t)det_ctx->pmq.rule_id_array_cnt);
608  }
609 #endif
611  DetectPrefilterCopyDeDup(de_ctx, det_ctx);
613  }
614 }
615 
616 /** \internal
617  * \brief check if the tx whose id is given is the only one
618  * live transaction for the flow in the given direction
619  *
620  * \param f flow
621  * \param txid transaction id
622  * \param dir direction
623  *
624  * \retval bool true if we are sure this tx is the only one live in said direction
625  */
626 static bool IsOnlyTxInDirection(Flow *f, uint64_t txid, uint8_t dir)
627 {
628  uint64_t tx_cnt = AppLayerParserGetTxCnt(f, f->alstate);
629  if (tx_cnt == txid + 1) {
630  // only live tx
631  return true;
632  }
633  if (tx_cnt == txid + 2) {
634  // 2 live txs, one after us
635  void *tx = AppLayerParserGetTx(f->proto, f->alproto, f->alstate, txid + 1);
636  if (tx) {
638  // test if the other tx is unidirectional in the other way
639  if ((dir == STREAM_TOSERVER && (txd->flags & APP_LAYER_TX_SKIP_INSPECT_TS)) ||
640  (dir == STREAM_TOCLIENT && (txd->flags & APP_LAYER_TX_SKIP_INSPECT_TC))) {
641  return true;
642  }
643  }
644  }
645  return false;
646 }
647 
648 static int SortHelper(const void *a, const void *b)
649 {
650  const Signature *sa = *(const Signature **)a;
651  const Signature *sb = *(const Signature **)b;
652  if (sa->iid == sb->iid)
653  return 0;
654  return sa->iid > sb->iid ? 1 : -1;
655 }
656 
657 static inline uint8_t DetectRulePacketRules(ThreadVars *const tv,
658  const DetectEngineCtx *const de_ctx, DetectEngineThreadCtx *const det_ctx, Packet *const p,
659  Flow *const pflow, const DetectRunScratchpad *scratch)
660 {
661  uint8_t action = 0;
662  bool fw_verdict = false;
663  const bool have_fw_rules = EngineModeIsFirewall();
664  const Signature *next_s = NULL;
665 
666  /* inspect the sigs against the packet */
667  /* Prefetch the next signature. */
668  SigIntId match_cnt = det_ctx->match_array_cnt;
669 #ifdef PROFILING
670  if (tv) {
672  (uint64_t)match_cnt);
673  }
674 #endif
675  Signature **match_array = det_ctx->match_array;
676 
677  SGH_PROFILING_RECORD(det_ctx, scratch->sgh);
678 #ifdef PROFILING
679  if (match_cnt >= de_ctx->profile_match_logging_threshold)
680  RulesDumpMatchArray(det_ctx, scratch->sgh, p);
681 #endif
682 
683  bool skip_fw = false;
684  uint32_t sflags, next_sflags = 0;
685  if (match_cnt) {
686  next_s = *match_array++;
687  next_sflags = next_s->flags;
688  }
689  while (match_cnt--) {
691  bool break_out_of_packet_filter = false;
692  uint8_t alert_flags = 0;
693 #ifdef PROFILE_RULES
694  bool smatch = false; /* signature match */
695 #endif
696  const Signature *s = next_s;
697  sflags = next_sflags;
698  if (match_cnt) {
699  next_s = *match_array++;
700  next_sflags = next_s->flags;
701  }
702  const uint8_t s_proto_flags = s->proto.flags;
703 
704  SCLogDebug("packet %" PRIu64 ": inspecting signature id %" PRIu32 "", p->pcap_cnt, s->id);
705 
706  /* if we accept:hook'd the `packet_filter` hook, we skip the rest of the firewall rules. */
707  if (s->flags & SIG_FLAG_FIREWALL) {
708  if (skip_fw) {
709  SCLogDebug("skipping firewall rule %u", s->id);
710  goto next;
711  }
712  } else if (have_fw_rules) {
713  /* fw mode, we skip anything after the fw rules if:
714  * - flow pass is set
715  * - packet pass (e.g. exception policy) */
716  if (p->flags & PKT_NOPACKET_INSPECTION ||
717  (pflow != NULL && pflow->flags & (FLOW_ACTION_PASS))) {
718  SCLogDebug("skipping firewall rule %u", s->id);
719  break_out_of_packet_filter = true;
720  goto next;
721  }
722  }
723 
724  if (s->app_inspect != NULL) {
725  goto next; // handle sig in DetectRunTx
726  }
727  if (s->frame_inspect != NULL) {
728  goto next; // handle sig in DetectRunFrame
729  }
730 
731  /* skip pkt sigs for flow end packets */
732  if ((p->flags & PKT_PSEUDO_STREAM_END) != 0 && s->type == SIG_TYPE_PKT)
733  goto next;
734 
735  /* don't run mask check for stateful rules.
736  * There we depend on prefilter */
737  if ((s->mask & p->sig_mask) != s->mask) {
738  SCLogDebug("mask mismatch %x & %x != %x", s->mask, p->sig_mask, s->mask);
739  goto next;
740  }
741 
742  if (SigDsizePrefilter(p, s, sflags))
743  goto next;
744 
745  /* if the sig has alproto and the session as well they should match */
746  if (likely(sflags & SIG_FLAG_APPLAYER)) {
747  if (s->alproto != ALPROTO_UNKNOWN && !AppProtoEquals(s->alproto, scratch->alproto)) {
748  SCLogDebug("alproto mismatch");
749  goto next;
750  }
751  }
752 
753  if (!DetectRunInspectRuleHeader(p, pflow, s, sflags, s_proto_flags)) {
754  goto next;
755  }
756 
757  if (!DetectEnginePktInspectionRun(tv, det_ctx, s, pflow, p, &alert_flags)) {
758  goto next;
759  }
760 
761 #ifdef PROFILE_RULES
762  smatch = true;
763 #endif
764  DetectRunPostMatch(tv, det_ctx, p, s);
765 
766  uint64_t txid = PACKET_ALERT_NOTX;
767  if (pflow && pflow->alstate) {
768  uint8_t dir = (p->flowflags & FLOW_PKT_TOCLIENT) ? STREAM_TOCLIENT : STREAM_TOSERVER;
770  if ((s->alproto != ALPROTO_UNKNOWN && pflow->proto == IPPROTO_UDP) ||
771  (de_ctx->guess_applayer && IsOnlyTxInDirection(pflow, txid, dir))) {
772  // if there is a UDP specific app-layer signature,
773  // or only one live transaction
774  // try to use the good tx for the packet direction
775  void *tx_ptr =
776  AppLayerParserGetTx(pflow->proto, pflow->alproto, pflow->alstate, txid);
777  AppLayerTxData *txd =
778  tx_ptr ? AppLayerParserGetTxData(pflow->proto, pflow->alproto, tx_ptr)
779  : NULL;
780  if (txd && txd->guessed_applayer_logged < de_ctx->guess_applayer_log_limit) {
781  alert_flags |= PACKET_ALERT_FLAG_TX;
782  if (pflow->proto != IPPROTO_UDP) {
783  alert_flags |= PACKET_ALERT_FLAG_TX_GUESSED;
784  }
785  txd->guessed_applayer_logged++;
786  }
787  }
788  }
789  AlertQueueAppend(det_ctx, s, p, txid, alert_flags);
790 
791  if (det_ctx->post_rule_work_queue.len > 0) {
792  /* run post match prefilter engines on work queue */
793  PrefilterPostRuleMatch(det_ctx, scratch->sgh, p, pflow);
794 
795  if (det_ctx->pmq.rule_id_array_cnt > 0) {
796  /* undo "prefetch" */
797  if (next_s)
798  match_array--;
799  /* create temporary rule pointer array starting
800  * at where we are in the current match array */
801  const Signature *replace[de_ctx->sig_array_len]; // TODO heap?
802  SCLogDebug("sig_array_len %u det_ctx->pmq.rule_id_array_cnt %u",
804  const Signature **r = replace;
805  for (uint32_t x = 0; x < match_cnt; x++) {
806  *r++ = match_array[x];
807  SCLogDebug("appended %u", match_array[x]->id);
808  }
809  /* append the prefilter results, then sort it */
810  for (uint32_t x = 0; x < det_ctx->pmq.rule_id_array_cnt; x++) {
811  SCLogDebug("adding iid %u", det_ctx->pmq.rule_id_array[x]);
812  Signature *ts = de_ctx->sig_array[det_ctx->pmq.rule_id_array[x]];
813  SCLogDebug("adding id %u", ts->id);
814  if (ts->app_inspect == NULL) {
815  *r++ = ts;
816  match_cnt++;
817  }
818  }
819  if (match_cnt > 1) {
820  qsort(replace, match_cnt, sizeof(Signature *), SortHelper);
821  }
822  /* rewrite match_array to include the new additions, and deduplicate
823  * while at it. */
824  Signature **m = match_array;
825  Signature *last_sig = NULL;
826  uint32_t skipped = 0;
827  for (uint32_t x = 0; x < match_cnt; x++) {
828  /* de-duplicate */
829  if (last_sig == *m) {
830  skipped++;
831  continue;
832  }
833  last_sig = *m;
834  *m++ = (Signature *)replace[x];
835  }
836  match_cnt -= skipped;
837  /* prefetch next */
838  next_s = *match_array++;
839  next_sflags = next_s->flags;
840  SCLogDebug("%u rules added", det_ctx->pmq.rule_id_array_cnt);
841  det_ctx->post_rule_work_queue.len = 0;
842  PMQ_RESET(&det_ctx->pmq);
843  }
844  }
845 
846  /* firewall logic in the packet:filter table:
847  * 1. firewall rules preceed the packet:td rules in the list
848  * 2. if no rule issues an accept, we drop
849  * 3. drop is immediate
850  * 4. accept:
851  * - hook: skip rest of fw rules, inspect packet:td rules
852  * - packet: immediate accept, no packet:td or app:* inspect
853  * - flow: as packet, but applied to all future packets in the
854  * flow as well
855  */
856  if (s->flags & SIG_FLAG_FIREWALL) {
857  if (s->action & (ACTION_ACCEPT)) {
858  fw_verdict = true;
859 
860  enum ActionScope as = s->action_scope;
861  if (as == ACTION_SCOPE_HOOK) {
862  /* accept:hook: jump to first TD. Implemented as:
863  * skip until the first TD rule.
864  * Don't update action as we're just continuing to the next hook. */
865  skip_fw = true;
866 
867  } else if (as == ACTION_SCOPE_PACKET) {
868  /* accept:packet: break loop, return accept */
869  action |= s->action;
870  break_out_of_packet_filter = true;
871 
872  } else if (as == ACTION_SCOPE_FLOW) {
873  /* accept:flow: break loop, return accept */
874  action |= s->action;
875  break_out_of_packet_filter = true;
876 
877  /* set immediately, as we're in hook "packet_filter" */
878  if (pflow) {
879  pflow->flags |= FLOW_ACTION_ACCEPT;
880  }
881  }
882  } else if (s->action & ACTION_DROP) {
883  /* apply a drop immediately here */
884  fw_verdict = true;
885  action |= s->action;
886  break_out_of_packet_filter = true;
887  }
888  }
889 next:
890  DetectVarProcessList(det_ctx, pflow, p);
891  DetectReplaceFree(det_ctx);
892  RULE_PROFILING_END(det_ctx, s, smatch, p);
893 
894  /* fw accept:packet or accept:flow means we're done here */
895  if (break_out_of_packet_filter)
896  break;
897 
898  continue;
899  }
900 
901  /* if no rule told us to accept, and no rule explicitly dropped, we invoke the default drop
902  * policy
903  */
904  if (have_fw_rules && scratch->default_action == ACTION_DROP) {
905  if (!fw_verdict) {
908  action |= ACTION_DROP;
909  } else {
910  /* apply fw action */
911  p->action |= action;
912  }
913  }
914  return action;
915 }
916 
917 /** \internal
918  * \param default_action either ACTION_DROP (drop:packet) or ACTION_ACCEPT (accept:hook)
919  *
920  * ACTION_DROP means the default policy of drop:packet is applied
921  * ACTION_ACCEPT means the default policy of accept:hook is applied
922  */
923 static DetectRunScratchpad DetectRunSetup(const DetectEngineCtx *de_ctx,
924  DetectEngineThreadCtx *det_ctx, Packet *const p, Flow *const pflow,
925  const uint8_t default_action)
926 {
927  AppProto alproto = ALPROTO_UNKNOWN;
928  uint8_t flow_flags = 0; /* flow/state flags */
929  bool app_decoder_events = false;
930 
932 
933 #ifdef UNITTESTS
934  if (RunmodeIsUnittests()) {
935  p->alerts.cnt = 0;
936  p->alerts.discarded = 0;
937  p->alerts.suppressed = 0;
938  }
939 #endif
940  det_ctx->filestore_cnt = 0;
941  det_ctx->base64_decoded_len = 0;
942  det_ctx->raw_stream_progress = 0;
943  det_ctx->match_array_cnt = 0;
944  det_ctx->json_content_len = 0;
945 
946  det_ctx->alert_queue_size = 0;
947  p->alerts.drop.action = 0;
948 
949 #ifdef DEBUG
950  if (p->flags & PKT_STREAM_ADD) {
951  det_ctx->pkt_stream_add_cnt++;
952  }
953 #endif
954 
955  /* grab the protocol state we will detect on */
956  if (p->flags & PKT_HAS_FLOW) {
957  DEBUG_VALIDATE_BUG_ON(pflow == NULL);
958 
959  if (p->flowflags & FLOW_PKT_TOSERVER) {
960  flow_flags = STREAM_TOSERVER;
961  SCLogDebug("flag STREAM_TOSERVER set");
962  } else if (p->flowflags & FLOW_PKT_TOCLIENT) {
963  flow_flags = STREAM_TOCLIENT;
964  SCLogDebug("flag STREAM_TOCLIENT set");
965  }
966  SCLogDebug("p->flowflags 0x%02x", p->flowflags);
967 
968  if (p->flags & PKT_PSEUDO_STREAM_END) {
969  flow_flags |= STREAM_EOF;
970  SCLogDebug("STREAM_EOF set");
971  }
972 
973  /* store tenant_id in the flow so that we can use it
974  * for creating pseudo packets */
975  if (p->tenant_id > 0 && pflow->tenant_id == 0) {
976  pflow->tenant_id = p->tenant_id;
977  }
978 
979  /* live ruleswap check for flow updates */
980  if (pflow->de_ctx_version == 0) {
981  /* first time this flow is inspected, set id */
982  pflow->de_ctx_version = de_ctx->version;
983  } else if (pflow->de_ctx_version != de_ctx->version) {
984  /* first time we inspect flow with this de_ctx, reset */
985  pflow->flags &= ~FLOW_SGH_TOSERVER;
986  pflow->flags &= ~FLOW_SGH_TOCLIENT;
987  pflow->sgh_toserver = NULL;
988  pflow->sgh_toclient = NULL;
989 
990  pflow->de_ctx_version = de_ctx->version;
991  GenericVarFree(pflow->flowvar);
992  pflow->flowvar = NULL;
993 
995  }
996 
997  /* Retrieve the app layer state and protocol and the tcp reassembled
998  * stream chunks. */
999  if ((p->proto == IPPROTO_TCP && (p->flags & PKT_STREAM_EST)) ||
1000  (p->proto == IPPROTO_UDP) ||
1002  {
1003  /* update flow flags with knowledge on disruptions */
1004  flow_flags = FlowGetDisruptionFlags(pflow, flow_flags);
1005  alproto = FlowGetAppProtocol(pflow);
1006  if (p->proto == IPPROTO_TCP && pflow->protoctx &&
1009  }
1010  SCLogDebug("alproto %u", alproto);
1011  } else {
1012  SCLogDebug("packet doesn't have established flag set (proto %d)", p->proto);
1013  }
1014 
1015  app_decoder_events = AppLayerParserHasDecoderEvents(pflow->alparser);
1016  }
1017 
1018  DetectRunScratchpad pad = { alproto, flow_flags, app_decoder_events, default_action, NULL };
1020  return pad;
1021 }
1022 
1023 static inline void DetectRunPostRules(ThreadVars *tv, const DetectEngineCtx *de_ctx,
1024  DetectEngineThreadCtx *det_ctx, Packet *const p, Flow *const pflow,
1025  DetectRunScratchpad *scratch)
1026 {
1027  /* so now let's iterate the alerts and remove the ones after a pass rule
1028  * matched (if any). This is done inside PacketAlertFinalize() */
1029  /* PR: installed "tag" keywords are handled after the threshold inspection */
1030 
1032  PacketAlertFinalize(de_ctx, det_ctx, p);
1033  if (p->alerts.cnt > 0) {
1034  StatsAddUI64(tv, det_ctx->counter_alerts, (uint64_t)p->alerts.cnt);
1035  }
1036  if (p->alerts.discarded > 0) {
1037  StatsAddUI64(tv, det_ctx->counter_alerts_overflow, (uint64_t)p->alerts.discarded);
1038  }
1039  if (p->alerts.suppressed > 0) {
1040  StatsAddUI64(tv, det_ctx->counter_alerts_suppressed, (uint64_t)p->alerts.suppressed);
1041  }
1043 
1044  /* firewall: "fail" closed if we don't have an ACCEPT. This can happen
1045  * if there was no rule group. */
1046  // TODO review packet src types here
1047  if (EngineModeIsFirewall() && !(p->action & ACTION_ACCEPT) && p->pkt_src == PKT_SRC_WIRE &&
1048  scratch->default_action == ACTION_DROP) {
1049  SCLogDebug("packet %" PRIu64 ": droppit as no ACCEPT set %02x (pkt %s)", p->pcap_cnt,
1050  p->action, PktSrcToString(p->pkt_src));
1052  }
1053 }
1054 
1055 static void DetectRunCleanup(DetectEngineThreadCtx *det_ctx,
1056  Packet *p, Flow * const pflow)
1057 {
1059  InspectionBufferClean(det_ctx);
1060 
1061  if (pflow != NULL) {
1062  /* update inspected tracker for raw reassembly */
1063  if (p->proto == IPPROTO_TCP && pflow->protoctx != NULL &&
1066  det_ctx->raw_stream_progress);
1067  }
1068  }
1070  SCReturn;
1071 }
1072 
1074 {
1076  det_ctx->tx_candidates = SCCalloc(size, sizeof(RuleMatchCandidateTx));
1077  if (det_ctx->tx_candidates == NULL) {
1078  FatalError("failed to allocate %" PRIu64 " bytes",
1079  (uint64_t)(size * sizeof(RuleMatchCandidateTx)));
1080  }
1081  det_ctx->tx_candidates_size = size;
1082  SCLogDebug("array initialized to %u elements (%"PRIu64" bytes)",
1083  size, (uint64_t)(size * sizeof(RuleMatchCandidateTx)));
1084 }
1085 
1087 {
1088  SCFree(det_ctx->tx_candidates);
1089  det_ctx->tx_candidates_size = 0;
1090 }
1091 
1092 /* if size >= cur_space */
1093 static inline bool RuleMatchCandidateTxArrayHasSpace(const DetectEngineThreadCtx *det_ctx,
1094  const uint32_t need)
1095 {
1096  if (det_ctx->tx_candidates_size >= need)
1097  return 1;
1098  return 0;
1099 }
1100 
1101 /* realloc */
1102 static int RuleMatchCandidateTxArrayExpand(DetectEngineThreadCtx *det_ctx, const uint32_t needed)
1103 {
1104  const uint32_t old_size = det_ctx->tx_candidates_size;
1105  uint32_t new_size = needed;
1106  void *ptmp = SCRealloc(det_ctx->tx_candidates, (new_size * sizeof(RuleMatchCandidateTx)));
1107  if (ptmp == NULL) {
1108  FatalError("failed to expand to %" PRIu64 " bytes",
1109  (uint64_t)(new_size * sizeof(RuleMatchCandidateTx)));
1110  // TODO can this be handled more gracefully?
1111  }
1112  det_ctx->tx_candidates = ptmp;
1113  det_ctx->tx_candidates_size = new_size;
1114  SCLogDebug("array expanded from %u to %u elements (%"PRIu64" bytes -> %"PRIu64" bytes)",
1115  old_size, new_size, (uint64_t)(old_size * sizeof(RuleMatchCandidateTx)),
1116  (uint64_t)(new_size * sizeof(RuleMatchCandidateTx))); (void)old_size;
1117  return 1;
1118 }
1119 
1120 /** \internal
1121  * \brief sort helper for sorting match candidates by id: ascending
1122  *
1123  * The id field is set from Signature::num, so we sort the candidates to match the signature
1124  * sort order (ascending), where candidates that have flags go first.
1125  */
1126 static int
1127 DetectRunTxSortHelper(const void *a, const void *b)
1128 {
1129  const RuleMatchCandidateTx *s0 = a;
1130  const RuleMatchCandidateTx *s1 = b;
1131  if (s1->id == s0->id) {
1132  if (s1->flags && !s0->flags)
1133  return 1;
1134  else if (!s1->flags && s0->flags)
1135  return -1;
1136  return 0;
1137  } else
1138  return s0->id > s1->id ? 1 : -1;
1139 }
1140 
1141 #if 0
1142 #define TRACE_SID_TXS(sid,txs,...) \
1143  do { \
1144  char _trace_buf[2048]; \
1145  snprintf(_trace_buf, sizeof(_trace_buf), __VA_ARGS__); \
1146  SCLogNotice("%p/%"PRIu64"/%u: %s", txs->tx_ptr, txs->tx_id, sid, _trace_buf); \
1147  } while(0)
1148 #else
1149 #define TRACE_SID_TXS(sid,txs,...)
1150 #endif
1151 
1152 // Get inner transaction for engine
1153 void *DetectGetInnerTx(void *tx_ptr, AppProto alproto, AppProto engine_alproto, uint8_t flow_flags)
1154 {
1155  if (unlikely(alproto == ALPROTO_DOH2)) {
1156  if (engine_alproto == ALPROTO_DNS) {
1157  // need to get the dns tx pointer
1158  tx_ptr = SCDoH2GetDnsTx(tx_ptr, flow_flags);
1159  } else if (engine_alproto != ALPROTO_HTTP2 && engine_alproto != ALPROTO_UNKNOWN) {
1160  // incompatible engine->alproto with flow alproto
1161  tx_ptr = NULL;
1162  }
1163  } else if (engine_alproto != alproto && engine_alproto != ALPROTO_UNKNOWN) {
1164  // incompatible engine->alproto with flow alproto
1165  tx_ptr = NULL;
1166  }
1167  return tx_ptr;
1168 }
1169 
1170 /** \internal
1171  * \brief inspect a rule against a transaction
1172  *
1173  * Inspect a rule. New detection or continued stateful
1174  * detection.
1175  *
1176  * \param stored_flags pointer to stored flags or NULL.
1177  * If stored_flags is set it means we're continuing
1178  * inspection from an earlier run.
1179  *
1180  * \retval bool true sig matched, false didn't match
1181  */
1182 static bool DetectRunTxInspectRule(ThreadVars *tv,
1184  DetectEngineThreadCtx *det_ctx,
1185  Packet *p,
1186  Flow *f,
1187  const uint8_t in_flow_flags, // direction, EOF, etc
1188  void *alstate,
1189  DetectTransaction *tx,
1190  const Signature *s,
1191  uint32_t *stored_flags,
1192  RuleMatchCandidateTx *can,
1193  DetectRunScratchpad *scratch)
1194 {
1195  const uint8_t flow_flags = in_flow_flags;
1196  const int direction = (flow_flags & STREAM_TOSERVER) ? 0 : 1;
1197  uint32_t inspect_flags = stored_flags ? *stored_flags : 0;
1198  int total_matches = 0;
1199  uint16_t file_no_match = 0;
1200  bool retval = false;
1201  bool mpm_before_progress = false; // is mpm engine before progress?
1202  bool mpm_in_progress = false; // is mpm engine in a buffer we will revisit?
1203 
1204  TRACE_SID_TXS(s->id, tx, "starting %s", direction ? "toclient" : "toserver");
1205 
1206  /* for a new inspection we inspect pkt header and packet matches */
1207  if (likely(stored_flags == NULL)) {
1208  TRACE_SID_TXS(s->id, tx, "first inspect, run packet matches");
1209  if (!DetectRunInspectRuleHeader(p, f, s, s->flags, s->proto.flags)) {
1210  TRACE_SID_TXS(s->id, tx, "DetectRunInspectRuleHeader() no match");
1211  return false;
1212  }
1213  if (!DetectEnginePktInspectionRun(tv, det_ctx, s, f, p, NULL)) {
1214  TRACE_SID_TXS(s->id, tx, "DetectEnginePktInspectionRun no match");
1215  return false;
1216  }
1217  /* stream mpm and negated mpm sigs can end up here with wrong proto */
1218  if (!(AppProtoEquals(s->alproto, f->alproto) || s->alproto == ALPROTO_UNKNOWN)) {
1219  TRACE_SID_TXS(s->id, tx, "alproto mismatch");
1220  return false;
1221  }
1222  }
1223 
1224  const DetectEngineAppInspectionEngine *engine = s->app_inspect;
1225  do {
1226  TRACE_SID_TXS(s->id, tx, "engine %p inspect_flags %x", engine, inspect_flags);
1227  // also if it is not the same direction, but
1228  // this is a transactional signature, and we are toclient
1229  if (!(inspect_flags & BIT_U32(engine->id)) &&
1230  (direction == engine->dir || ((s->flags & SIG_FLAG_TXBOTHDIR) && direction == 1))) {
1231 
1232  void *tx_ptr = DetectGetInnerTx(tx->tx_ptr, f->alproto, engine->alproto, flow_flags);
1233  if (tx_ptr == NULL) {
1234  if (engine->alproto != ALPROTO_UNKNOWN) {
1235  /* special case: file_data on 'alert tcp' will have engines
1236  * in the list that are not for us. */
1237  engine = engine->next;
1238  continue;
1239  } else {
1240  tx_ptr = tx->tx_ptr;
1241  }
1242  }
1243 
1244  /* engines are sorted per progress, except that the one with
1245  * mpm/prefilter enabled is first */
1246  if (tx->tx_progress < engine->progress) {
1247  SCLogDebug("tx progress %d < engine progress %d",
1248  tx->tx_progress, engine->progress);
1249  break;
1250  }
1251  if (engine->mpm) {
1252  if (tx->tx_progress > engine->progress) {
1253  TRACE_SID_TXS(s->id, tx,
1254  "engine->mpm: t->tx_progress %u > engine->progress %u, so set "
1255  "mpm_before_progress",
1256  tx->tx_progress, engine->progress);
1257  mpm_before_progress = true;
1258  } else if (tx->tx_progress == engine->progress) {
1259  TRACE_SID_TXS(s->id, tx,
1260  "engine->mpm: t->tx_progress %u == engine->progress %u, so set "
1261  "mpm_in_progress",
1262  tx->tx_progress, engine->progress);
1263  mpm_in_progress = true;
1264  }
1265  }
1266 
1267  uint8_t engine_flags = flow_flags;
1268  if (direction != engine->dir) {
1269  engine_flags = flow_flags ^ (STREAM_TOCLIENT | STREAM_TOSERVER);
1270  }
1271  /* run callback: but bypass stream callback if we can */
1272  uint8_t match;
1273  if (unlikely(engine->stream && can->stream_stored)) {
1274  match = can->stream_result;
1275  TRACE_SID_TXS(s->id, tx, "stream skipped, stored result %d used instead", match);
1276  } else if (engine->v2.Callback == NULL) {
1277  /* TODO is this the cleanest way to support a non-app sig on a app hook? */
1278 
1279  if (tx->tx_progress > engine->progress) {
1280  mpm_before_progress = true; // TODO needs a new name now
1281  }
1282 
1283  /* we don't have to store a "hook" match, also don't want to keep any state to make
1284  * sure the hook gets invoked again until tx progress progresses. */
1285  if (tx->tx_progress <= engine->progress)
1287 
1288  /* if progress > engine progress, track state to avoid additional matches */
1290  } else {
1291  KEYWORD_PROFILING_SET_LIST(det_ctx, engine->sm_list);
1292  DEBUG_VALIDATE_BUG_ON(engine->v2.Callback == NULL);
1293  match = engine->v2.Callback(
1294  de_ctx, det_ctx, engine, s, f, engine_flags, alstate, tx_ptr, tx->tx_id);
1295  TRACE_SID_TXS(s->id, tx, "engine %p match %d", engine, match);
1296  if (engine->stream) {
1297  can->stream_stored = true;
1298  can->stream_result = match;
1299  TRACE_SID_TXS(s->id, tx, "stream ran, store result %d for next tx (if any)", match);
1300  }
1301  }
1302  if (match == DETECT_ENGINE_INSPECT_SIG_MATCH) {
1303  inspect_flags |= BIT_U32(engine->id);
1304  engine = engine->next;
1305  total_matches++;
1306  continue;
1307  } else if (match == DETECT_ENGINE_INSPECT_SIG_MATCH_MORE_FILES) {
1308  /* if the file engine matched, but indicated more
1309  * files are still in progress, we don't set inspect
1310  * flags as these would end inspection for this tx */
1311  engine = engine->next;
1312  total_matches++;
1313  continue;
1314  } else if (match == DETECT_ENGINE_INSPECT_SIG_CANT_MATCH) {
1315  inspect_flags |= DE_STATE_FLAG_SIG_CANT_MATCH;
1316  inspect_flags |= BIT_U32(engine->id);
1317  } else if (match == DETECT_ENGINE_INSPECT_SIG_CANT_MATCH_FILES) {
1318  inspect_flags |= DE_STATE_FLAG_SIG_CANT_MATCH;
1319  inspect_flags |= BIT_U32(engine->id);
1320  file_no_match = 1;
1321  }
1322  /* implied DETECT_ENGINE_INSPECT_SIG_NO_MATCH */
1323  if (engine->mpm && mpm_before_progress) {
1324  inspect_flags |= DE_STATE_FLAG_SIG_CANT_MATCH;
1325  inspect_flags |= BIT_U32(engine->id);
1326  }
1327  break;
1328  } else if (!(inspect_flags & BIT_U32(engine->id)) && s->flags & SIG_FLAG_TXBOTHDIR &&
1329  direction != engine->dir) {
1330  // for transactional rules, the engines on the opposite direction
1331  // are ordered by progress on the different side
1332  // so we have a two mixed-up lists, and we skip the elements
1333  if (direction == 0 && engine->next == NULL) {
1334  // do not match yet on request only
1335  break;
1336  }
1337  engine = engine->next;
1338  continue;
1339  }
1340 
1341  engine = engine->next;
1342  } while (engine != NULL);
1343  TRACE_SID_TXS(s->id, tx, "inspect_flags %x, total_matches %u, engine %p",
1344  inspect_flags, total_matches, engine);
1345 
1346  if (engine == NULL && total_matches) {
1347  inspect_flags |= DE_STATE_FLAG_FULL_INSPECT;
1348  TRACE_SID_TXS(s->id, tx, "MATCH");
1349  retval = true;
1350  }
1351 
1352  if (stored_flags) {
1353  *stored_flags = inspect_flags;
1354  TRACE_SID_TXS(s->id, tx, "continue inspect flags %08x", inspect_flags);
1355  } else {
1356  // store... or? If tx is done we might not want to come back to this tx
1357 
1358  // also... if mpmid tracking is enabled, we won't do a sig again for this tx...
1359  TRACE_SID_TXS(s->id, tx, "start inspect flags %08x", inspect_flags);
1360  if (inspect_flags & DE_STATE_FLAG_SIG_CANT_MATCH) {
1361  if (file_no_match) {
1362  /* if we have a mismatch on a file sig, we need to keep state.
1363  * We may get another file on the same tx (for http and smtp
1364  * at least), so for a new file we need to re-eval the sig.
1365  * Thoughts / TODO:
1366  * - not for some protos that have 1 file per tx (e.g. nfs)
1367  * - maybe we only need this for file sigs that mix with
1368  * other matches? E.g. 'POST + filename', is different than
1369  * just 'filename'.
1370  */
1371  DetectRunStoreStateTx(scratch->sgh, f, tx->tx_ptr, tx->tx_id, s,
1372  inspect_flags, flow_flags, file_no_match);
1373  }
1374  } else if ((inspect_flags & DE_STATE_FLAG_FULL_INSPECT) && mpm_before_progress) {
1375  TRACE_SID_TXS(s->id, tx, "no need to store match sig, "
1376  "mpm won't trigger for it anymore");
1377 
1378  if (inspect_flags & DE_STATE_FLAG_FILE_INSPECT) {
1379  TRACE_SID_TXS(s->id, tx, "except that for new files, "
1380  "we may have to revisit anyway");
1381  DetectRunStoreStateTx(scratch->sgh, f, tx->tx_ptr, tx->tx_id, s,
1382  inspect_flags, flow_flags, file_no_match);
1383  }
1384  } else if ((inspect_flags & DE_STATE_FLAG_FULL_INSPECT) == 0 && mpm_in_progress) {
1385  TRACE_SID_TXS(s->id, tx, "no need to store no-match sig, "
1386  "mpm will revisit it");
1387  } else if (inspect_flags != 0 || file_no_match != 0) {
1388  TRACE_SID_TXS(s->id, tx, "storing state: flags %08x", inspect_flags);
1389  DetectRunStoreStateTx(scratch->sgh, f, tx->tx_ptr, tx->tx_id, s,
1390  inspect_flags, flow_flags, file_no_match);
1391  }
1392  }
1393 
1394  return retval;
1395 }
1396 
1397 #define NO_TX \
1398  { \
1399  NULL, 0, NULL, NULL, 0, 0, 0, 0, \
1400  }
1401 
1402 /** \internal
1403  * \brief get a DetectTransaction object
1404  * \retval struct filled with relevant info or all nulls/0s
1405  */
1406 static DetectTransaction GetDetectTx(const uint8_t ipproto, const AppProto alproto,
1407  const uint64_t tx_id, void *tx_ptr, const int tx_end_state, const uint8_t flow_flags)
1408 {
1409  AppLayerTxData *txd = AppLayerParserGetTxData(ipproto, alproto, tx_ptr);
1410  const int tx_progress = AppLayerParserGetStateProgress(ipproto, alproto, tx_ptr, flow_flags);
1411  bool updated = (flow_flags & STREAM_TOSERVER) ? txd->updated_ts : txd->updated_tc;
1412  if (!updated && tx_progress < tx_end_state && ((flow_flags & STREAM_EOF) == 0)) {
1413  DetectTransaction no_tx = NO_TX;
1414  return no_tx;
1415  }
1416  const uint8_t inspected_flag =
1417  (flow_flags & STREAM_TOSERVER) ? APP_LAYER_TX_INSPECTED_TS : APP_LAYER_TX_INSPECTED_TC;
1418  if (unlikely(txd->flags & inspected_flag)) {
1419  SCLogDebug("%" PRIu64 " tx already fully inspected for %s. Flags %02x", tx_id,
1420  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient", txd->flags);
1421  DetectTransaction no_tx = NO_TX;
1422  return no_tx;
1423  }
1424  const uint8_t skip_flag = (flow_flags & STREAM_TOSERVER) ? APP_LAYER_TX_SKIP_INSPECT_TS
1426  if (unlikely(txd->flags & skip_flag)) {
1427  SCLogDebug("%" PRIu64 " tx should not be inspected in direction %s. Flags %02x", tx_id,
1428  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient", txd->flags);
1429  DetectTransaction no_tx = NO_TX;
1430  return no_tx;
1431  }
1432 
1433  const uint8_t detect_progress =
1434  (flow_flags & STREAM_TOSERVER) ? txd->detect_progress_ts : txd->detect_progress_tc;
1435 
1436  const int dir_int = (flow_flags & STREAM_TOSERVER) ? 0 : 1;
1437  DetectEngineState *tx_de_state = txd->de_state;
1438  DetectEngineStateDirection *tx_dir_state =
1439  tx_de_state ? &tx_de_state->dir_state[dir_int] : NULL;
1440  DetectTransaction tx = {
1441  .tx_ptr = tx_ptr,
1442  .tx_id = tx_id,
1443  .tx_data_ptr = (struct AppLayerTxData *)txd,
1444  .de_state = tx_dir_state,
1445  .detect_progress = detect_progress,
1446  .detect_progress_orig = detect_progress,
1447  .tx_progress = tx_progress,
1448  .tx_end_state = tx_end_state,
1449  };
1450  return tx;
1451 }
1452 
1453 static inline void StoreDetectProgress(
1454  DetectTransaction *tx, const uint8_t flow_flags, const uint8_t progress)
1455 {
1457  if (flow_flags & STREAM_TOSERVER) {
1458  txd->detect_progress_ts = progress;
1459  } else {
1460  txd->detect_progress_tc = progress;
1461  }
1462 }
1463 
1464 // Merge 'state' rules from the regular prefilter
1465 // updates array_idx on the way
1466 static inline void RuleMatchCandidateMergeStateRules(
1467  DetectEngineThreadCtx *det_ctx, uint32_t *array_idx)
1468 {
1469  // Now, we will merge 2 sorted lists :
1470  // the one in det_ctx->tx_candidates
1471  // and the one in det_ctx->match_array
1472  // For match_array, we take only the relevant elements where s->app_inspect != NULL
1473 
1474  // Basically, we iterate at the same time over the 2 lists
1475  // comparing and taking an element from either.
1476 
1477  // Trick is to do so in place in det_ctx->tx_candidates,
1478  // so as to minimize the number of moves in det_ctx->tx_candidates.
1479  // For this, the algorithm traverses the lists in reverse order.
1480  // Otherwise, if the first element of match_array was to be put before
1481  // all tx_candidates, we would need to shift all tx_candidates
1482 
1483  // Retain the number of elements sorted in tx_candidates before merge
1484  uint32_t j = *array_idx;
1485  // First loop only counting the number of elements to add
1486  for (uint32_t i = 0; i < det_ctx->match_array_cnt; i++) {
1487  const Signature *s = det_ctx->match_array[i];
1488  if (s->app_inspect != NULL) {
1489  (*array_idx)++;
1490  }
1491  }
1492  // Future number of elements in tx_candidates after merge
1493  uint32_t k = *array_idx;
1494 
1495  if (k == j) {
1496  // no new element from match_array to merge in tx_candidates
1497  return;
1498  }
1499 
1500  // variable i is for all elements of match_array (even not relevant ones)
1501  // variable j is for elements of tx_candidates before merge
1502  // variable k is for elements of tx_candidates after merge
1503  for (uint32_t i = det_ctx->match_array_cnt; i > 0;) {
1504  const Signature *s = det_ctx->match_array[i - 1];
1505  if (s->app_inspect == NULL) {
1506  // no relevant element, get the next one from match_array
1507  i--;
1508  continue;
1509  }
1510  // we have one element from match_array to merge in tx_candidates
1511  k--;
1512  if (j > 0) {
1513  // j > 0 means there is still at least one element in tx_candidates to merge
1514  const RuleMatchCandidateTx *s0 = &det_ctx->tx_candidates[j - 1];
1515  if (s->iid <= s0->id) {
1516  // get next element from previous tx_candidates
1517  j--;
1518  // take the element from tx_candidates before merge
1519  det_ctx->tx_candidates[k].s = det_ctx->tx_candidates[j].s;
1520  det_ctx->tx_candidates[k].id = det_ctx->tx_candidates[j].id;
1521  det_ctx->tx_candidates[k].flags = det_ctx->tx_candidates[j].flags;
1522  det_ctx->tx_candidates[k].stream_reset = det_ctx->tx_candidates[j].stream_reset;
1523  continue;
1524  }
1525  } // otherwise
1526  // get next element from match_array
1527  i--;
1528  // take the element from match_array
1529  det_ctx->tx_candidates[k].s = s;
1530  det_ctx->tx_candidates[k].id = s->iid;
1531  det_ctx->tx_candidates[k].flags = NULL;
1532  det_ctx->tx_candidates[k].stream_reset = 0;
1533  }
1534  // Even if k > 0 or j > 0, the loop is over. (Note that j == k now)
1535  // The remaining elements in tx_candidates up to k were already sorted
1536  // and come before any other element later in the list
1537 }
1538 
1539 /**
1540  * \internal
1541  * \brief Check and update firewall rules state.
1542  *
1543  * \param skip_fw_hook bool to indicate firewall rules skips
1544  * For state `skip_before_progress` should be skipped.
1545  *
1546  * \param skip_before_progress progress value to skip rules before.
1547  * Only used if `skip_fw_hook` is set.
1548  *
1549  * \param last_for_progress[out] set to true if this is the last rule for a progress value
1550  *
1551  * \param fw_next_progress_missing[out] set to true if the next fw rule does not target the next
1552  * progress value, or there is no fw rule for that value.
1553  *
1554  * \retval 0 no action needed
1555  * \retval 1 rest of rules shouldn't inspected
1556  * \retval -1 skip this rule
1557  */
1558 static int DetectRunTxCheckFirewallPolicy(DetectEngineThreadCtx *det_ctx, Packet *p, Flow *f,
1559  DetectTransaction *tx, const Signature *s, const uint32_t can_idx, const uint32_t can_size,
1560  bool *skip_fw_hook, const uint8_t skip_before_progress, bool *last_for_progress,
1561  bool *fw_next_progress_missing)
1562 {
1563  if (s->flags & SIG_FLAG_FIREWALL) {
1564  /* check if the next sig is on the same progress hook. If not, we need to apply our
1565  * default policy in case the current sig doesn't apply one. If the next sig has a
1566  * progress beyond our progress + 1, it means the next progress has no rules and needs
1567  * the default policy applied. But only after we evaluate the current rule first, as
1568  * that may override it.
1569  * TODO should we do this after dedup below? */
1570 
1571  if (can_idx + 1 < can_size) {
1572  const Signature *next_s = det_ctx->tx_candidates[can_idx + 1].s;
1573  SCLogDebug(
1574  "peek: peeking at sid %u / progress %u", next_s->id, next_s->app_progress_hook);
1575  if (next_s->flags & SIG_FLAG_FIREWALL) {
1576  if (s->app_progress_hook != next_s->app_progress_hook) {
1577  SCLogDebug("peek: next sid progress %u != current progress %u, so current "
1578  "is last for progress",
1579  next_s->app_progress_hook, s->app_progress_hook);
1580  *last_for_progress = true;
1581 
1582  if (next_s->app_progress_hook - s->app_progress_hook > 1) {
1583  SCLogDebug("peek: missing progress, so we'll drop that unless we get a "
1584  "sweeping accept first");
1585  *fw_next_progress_missing = true;
1586  }
1587  }
1588  } else {
1589  SCLogDebug("peek: next sid not a fw rule, so current is last for progress");
1590  *last_for_progress = true;
1591  }
1592  } else {
1593  SCLogDebug("peek: no peek beyond last rule");
1594  if (s->app_progress_hook < tx->tx_progress) {
1595  SCLogDebug("peek: there are no rules to allow the state after this rule");
1596  *fw_next_progress_missing = true;
1597  }
1598  }
1599 
1600  if ((*skip_fw_hook) == true) {
1601  if (s->app_progress_hook <= skip_before_progress) {
1602  return -1;
1603  }
1604  *skip_fw_hook = false;
1605  }
1606  } else {
1607  /* fw mode, we skip anything after the fw rules if:
1608  * - flow pass is set
1609  * - packet pass (e.g. exception policy) */
1610  if (p->flags & PKT_NOPACKET_INSPECTION || (f->flags & (FLOW_ACTION_PASS))) {
1611  SCLogDebug("skipping firewall rule %u", s->id);
1612  return 1;
1613  }
1614  }
1615  return 0;
1616 }
1617 
1618 // TODO move into det_ctx?
1620 static inline void DetectRunAppendDefaultAccept(DetectEngineThreadCtx *det_ctx, Packet *p)
1621 {
1622  if (EngineModeIsFirewall()) {
1623  memset(&default_accept, 0, sizeof(default_accept));
1626  default_accept.iid = UINT32_MAX;
1630  }
1631 }
1632 
1633 /** \internal
1634  * \brief see if the accept rule needs to apply to the packet
1635  */
1636 static inline bool ApplyAcceptToPacket(
1637  const uint64_t total_txs, const DetectTransaction *tx, const Signature *s)
1638 {
1639  if ((s->flags & SIG_FLAG_FIREWALL) == 0) {
1640  return false;
1641  }
1642  if ((s->action & ACTION_ACCEPT) == 0) {
1643  return false;
1644  }
1645 
1646  /* for accept:tx we need:
1647  * - packet will only be accepted if this is set on the last tx
1648  */
1649  if (s->action_scope == ACTION_SCOPE_TX) {
1650  if (total_txs == tx->tx_id + 1) {
1651  return true;
1652  }
1653  }
1654  /* for accept:hook we need a bit more checking:
1655  * - packet will only be accepted if this is set on the last tx
1656  * - the hook accepted should be the last progress available. */
1657  if (s->action_scope == ACTION_SCOPE_HOOK) {
1658  if ((total_txs == tx->tx_id + 1) && /* last tx */
1659  (s->app_progress_hook == tx->tx_progress)) {
1660  return true;
1661  }
1662  }
1663  return false;
1664 }
1665 
1666 /** \internal
1667  * \retval bool true: break_out_of_app_filter, false: don't break out */
1668 static bool ApplyAccept(Packet *p, const uint8_t flow_flags, const Signature *s,
1669  DetectTransaction *tx, const int tx_end_state, const bool fw_next_progress_missing,
1670  bool *tx_fw_verdict, bool *skip_fw_hook, uint8_t *skip_before_progress)
1671 {
1672  *tx_fw_verdict = true;
1673 
1674  const enum ActionScope as = s->action_scope;
1675  /* accept:hook: jump to first rule of next state.
1676  * Implemented as skip until the first rule of next state. */
1677  if (as == ACTION_SCOPE_HOOK) {
1678  *skip_fw_hook = true;
1679  *skip_before_progress = s->app_progress_hook;
1680 
1681  /* if there is no fw rule for the next progress value,
1682  * we invoke the default drop policy. */
1683  if (fw_next_progress_missing) {
1684  SCLogDebug("%" PRIu64 ": %s default drop for progress", p->pcap_cnt,
1685  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient");
1687  p->flow->flags |= FLOW_ACTION_DROP;
1688  return true;
1689  }
1690  return false;
1691  } else if (as == ACTION_SCOPE_TX) {
1692  tx->tx_data_ptr->flags |= APP_LAYER_TX_ACCEPT;
1693  *skip_fw_hook = true;
1694  *skip_before_progress = (uint8_t)tx_end_state + 1; // skip all hooks
1695  SCLogDebug(
1696  "accept:tx applied, skip_fw_hook, skip_before_progress %u", *skip_before_progress);
1697  return false;
1698  } else if (as == ACTION_SCOPE_PACKET) {
1699  return true;
1700  } else if (as == ACTION_SCOPE_FLOW) {
1701  return true;
1702  }
1703  return false;
1704 }
1705 
1706 static void DetectRunTx(ThreadVars *tv,
1708  DetectEngineThreadCtx *det_ctx,
1709  Packet *p,
1710  Flow *f,
1711  DetectRunScratchpad *scratch)
1712 {
1713  const uint8_t flow_flags = scratch->flow_flags;
1714  const SigGroupHead * const sgh = scratch->sgh;
1715  void * const alstate = f->alstate;
1716  const uint8_t ipproto = f->proto;
1717  const AppProto alproto = f->alproto;
1718 
1719  const uint64_t total_txs = AppLayerParserGetTxCnt(f, alstate);
1720  uint64_t tx_id_min = AppLayerParserGetTransactionInspectId(f->alparser, flow_flags);
1721  const int tx_end_state = AppLayerParserGetStateProgressCompletionStatus(alproto, flow_flags);
1722 
1723  AppLayerGetTxIteratorFunc IterFunc = AppLayerGetTxIterator(ipproto, alproto);
1724  AppLayerGetTxIterState state = { 0 };
1725 
1726  uint32_t fw_verdicted = 0;
1727  uint32_t tx_inspected = 0;
1728  const bool have_fw_rules = EngineModeIsFirewall();
1729 
1730  SCLogDebug("packet %" PRIu64, p->pcap_cnt);
1731 
1732  while (1) {
1733  AppLayerGetTxIterTuple ires = IterFunc(ipproto, alproto, alstate, tx_id_min, total_txs, &state);
1734  if (ires.tx_ptr == NULL)
1735  break;
1736 
1737  DetectTransaction tx =
1738  GetDetectTx(ipproto, alproto, ires.tx_id, ires.tx_ptr, tx_end_state, flow_flags);
1739  if (tx.tx_ptr == NULL) {
1740  SCLogDebug("%p/%"PRIu64" no transaction to inspect",
1741  tx.tx_ptr, tx_id_min);
1742 
1743  tx_id_min++; // next (if any) run look for +1
1744  goto next;
1745  }
1746  tx_id_min = tx.tx_id + 1; // next look for cur + 1
1747  tx_inspected++;
1748 
1749  SCLogDebug("%p/%" PRIu64 " txd flags %02x", tx.tx_ptr, tx_id_min, tx.tx_data_ptr->flags);
1750 
1751  det_ctx->tx_id = tx.tx_id;
1752  det_ctx->tx_id_set = true;
1753  det_ctx->p = p;
1754 
1755  bool do_sort = false; // do we need to sort the tx candidate list?
1756  uint32_t array_idx = 0;
1757  uint32_t total_rules = det_ctx->match_array_cnt;
1758  total_rules += (tx.de_state ? tx.de_state->cnt : 0);
1759 
1760  /* run prefilter engines and merge results into a candidates array */
1761  if (sgh->tx_engines) {
1763  DetectRunPrefilterTx(det_ctx, sgh, p, ipproto, flow_flags, alproto,
1764  alstate, &tx);
1766  SCLogDebug("%p/%"PRIu64" rules added from prefilter: %u candidates",
1767  tx.tx_ptr, tx.tx_id, det_ctx->pmq.rule_id_array_cnt);
1768 
1769  total_rules += det_ctx->pmq.rule_id_array_cnt;
1770  if (!(RuleMatchCandidateTxArrayHasSpace(det_ctx, total_rules))) {
1771  RuleMatchCandidateTxArrayExpand(det_ctx, total_rules);
1772  }
1773 
1774  for (uint32_t i = 0; i < det_ctx->pmq.rule_id_array_cnt; i++) {
1775  const Signature *s = de_ctx->sig_array[det_ctx->pmq.rule_id_array[i]];
1776  const SigIntId id = s->iid;
1777  det_ctx->tx_candidates[array_idx].s = s;
1778  det_ctx->tx_candidates[array_idx].id = id;
1779  det_ctx->tx_candidates[array_idx].flags = NULL;
1780  det_ctx->tx_candidates[array_idx].stream_reset = 0;
1781  array_idx++;
1782  }
1783  PMQ_RESET(&det_ctx->pmq);
1784  } else {
1785  if (!(RuleMatchCandidateTxArrayHasSpace(det_ctx, total_rules))) {
1786  RuleMatchCandidateTxArrayExpand(det_ctx, total_rules);
1787  }
1788  }
1789 
1790  /* merge 'state' rules from the regular prefilter */
1791 #ifdef PROFILING
1792  uint32_t x = array_idx;
1793 #endif
1794  RuleMatchCandidateMergeStateRules(det_ctx, &array_idx);
1795 
1796  /* merge stored state into results */
1797  if (tx.de_state != NULL) {
1798  const uint32_t old = array_idx;
1799 
1800  /* if tx.de_state->flags has 'new file' set and sig below has
1801  * 'file inspected' flag, reset the file part of the state */
1802  const bool have_new_file = (tx.de_state->flags & DETECT_ENGINE_STATE_FLAG_FILE_NEW);
1803  if (have_new_file) {
1804  SCLogDebug("%p/%"PRIu64" destate: need to consider new file",
1805  tx.tx_ptr, tx.tx_id);
1807  }
1808 
1809  SigIntId state_cnt = 0;
1810  DeStateStore *tx_store = tx.de_state->head;
1811  for (; tx_store != NULL; tx_store = tx_store->next) {
1812  SCLogDebug("tx_store %p", tx_store);
1813 
1814  SigIntId store_cnt = 0;
1815  for (store_cnt = 0;
1816  store_cnt < DE_STATE_CHUNK_SIZE && state_cnt < tx.de_state->cnt;
1817  store_cnt++, state_cnt++)
1818  {
1819  DeStateStoreItem *item = &tx_store->store[store_cnt];
1820  SCLogDebug("rule id %u, inspect_flags %u", item->sid, item->flags);
1821  if (have_new_file && (item->flags & DE_STATE_FLAG_FILE_INSPECT)) {
1822  /* remove part of the state. File inspect engine will now
1823  * be able to run again */
1825  SCLogDebug("rule id %u, post file reset inspect_flags %u", item->sid, item->flags);
1826  }
1827  det_ctx->tx_candidates[array_idx].s = de_ctx->sig_array[item->sid];
1828  det_ctx->tx_candidates[array_idx].id = item->sid;
1829  det_ctx->tx_candidates[array_idx].flags = &item->flags;
1830  det_ctx->tx_candidates[array_idx].stream_reset = 0;
1831  array_idx++;
1832  }
1833  }
1834  do_sort |= (old && old != array_idx); // sort if continue list adds sids
1835  SCLogDebug("%p/%" PRIu64 " rules added from 'continue' list: %u", tx.tx_ptr, tx.tx_id,
1836  array_idx - old);
1837  }
1838  if (do_sort) {
1839  qsort(det_ctx->tx_candidates, array_idx, sizeof(RuleMatchCandidateTx),
1840  DetectRunTxSortHelper);
1841  }
1842 
1843 #ifdef PROFILING
1844  if (array_idx >= de_ctx->profile_match_logging_threshold)
1845  RulesDumpTxMatchArray(det_ctx, scratch->sgh, p, tx.tx_id, array_idx, x);
1846 #endif
1847 
1848 #ifdef DEBUG
1849  for (uint32_t i = 0; i < array_idx; i++) {
1850  RuleMatchCandidateTx *can = &det_ctx->tx_candidates[i];
1851  const Signature *s = det_ctx->tx_candidates[i].s;
1852  SCLogDebug("%u: sid %u flags %p", i, s->id, can->flags);
1853  }
1854 #endif
1855  bool skip_fw_hook = false;
1856  uint8_t skip_before_progress = 0;
1857  bool fw_next_progress_missing = false;
1858 
1859  /* if there are no rules / rule candidates, make sure we don't
1860  * invoke the default drop */
1861  if (have_fw_rules && array_idx == 0 && (tx.tx_data_ptr->flags & APP_LAYER_TX_ACCEPT)) {
1862  fw_verdicted++;
1863 
1864  /* current tx is the last we have, append a blank accept:packet */
1865  if (total_txs == tx.tx_id + 1) {
1866  DetectRunAppendDefaultAccept(det_ctx, p);
1867  return;
1868  }
1869  goto next;
1870  }
1871 
1872  bool tx_fw_verdict = false;
1873  /* run rules: inspect the match candidates */
1874  for (uint32_t i = 0; i < array_idx; i++) {
1875  RuleMatchCandidateTx *can = &det_ctx->tx_candidates[i];
1876  const Signature *s = det_ctx->tx_candidates[i].s;
1877  uint32_t *inspect_flags = det_ctx->tx_candidates[i].flags;
1878  bool break_out_of_app_filter = false;
1879 
1880  SCLogDebug("%" PRIu64 ": sid:%u: %s tx %u/%u/%u sig %u", p->pcap_cnt, s->id,
1881  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient", tx.tx_progress,
1883 
1884  /* deduplicate: rules_array is sorted, but not deduplicated:
1885  * both mpm and stored state could give us the same sid.
1886  * As they are back to back in that case we can check for it
1887  * here. We select the stored state one as that comes first
1888  * in the array. */
1889  while ((i + 1) < array_idx &&
1890  det_ctx->tx_candidates[i].s == det_ctx->tx_candidates[i + 1].s) {
1891  SCLogDebug("%p/%" PRIu64 " inspecting SKIP NEXT: sid %u (%u), flags %08x",
1892  tx.tx_ptr, tx.tx_id, s->id, s->iid, inspect_flags ? *inspect_flags : 0);
1893  i++;
1894  }
1895 
1896  /* skip fw rules if we're in accept:tx mode */
1897  if (have_fw_rules && (tx.tx_data_ptr->flags & APP_LAYER_TX_ACCEPT)) {
1898  /* append a blank accept:packet action for the APP_LAYER_TX_ACCEPT,
1899  * if this is the last tx */
1900  if (!tx_fw_verdict) {
1901  const bool accept_tx_applies_to_packet = total_txs == tx.tx_id + 1;
1902  if (accept_tx_applies_to_packet) {
1903  SCLogDebug("accept:(tx|hook): should be applied to the packet");
1904  DetectRunAppendDefaultAccept(det_ctx, p);
1905  }
1906  }
1907  tx_fw_verdict = true;
1908 
1909  if (s->flags & SIG_FLAG_FIREWALL) {
1910  SCLogDebug("APP_LAYER_TX_ACCEPT, so skip rule");
1911  continue;
1912  }
1913 
1914  /* threat detect rules will be inspected */
1915  }
1916 
1917  SCLogDebug("%p/%" PRIu64 " inspecting: sid %u (%u), flags %08x", tx.tx_ptr, tx.tx_id,
1918  s->id, s->iid, inspect_flags ? *inspect_flags : 0);
1919 
1920  if (inspect_flags) {
1921  if (*inspect_flags & DE_STATE_FLAG_FULL_INSPECT) {
1922  SCLogDebug("%p/%" PRIu64
1923  " inspecting: sid %u (%u), flags %08x DE_STATE_FLAG_FULL_INSPECT",
1924  tx.tx_ptr, tx.tx_id, s->id, s->iid, *inspect_flags);
1925 
1926  /* if we're still in the same progress state as an earlier full
1927  * match, we need to apply the same accept */
1928  if (have_fw_rules && (s->flags & SIG_FLAG_FIREWALL) &&
1929  (s->action & ACTION_ACCEPT) && s->app_progress_hook == tx.tx_progress) {
1930  const bool fw_accept_to_packet = ApplyAcceptToPacket(total_txs, &tx, s);
1931  break_out_of_app_filter = ApplyAccept(p, flow_flags, s, &tx, tx_end_state,
1932  fw_next_progress_missing, &tx_fw_verdict, &skip_fw_hook,
1933  &skip_before_progress);
1934  if (fw_accept_to_packet)
1935  DetectRunAppendDefaultAccept(det_ctx, p);
1936  if (break_out_of_app_filter)
1937  break;
1938  }
1939  continue;
1940  }
1941  if (*inspect_flags & DE_STATE_FLAG_SIG_CANT_MATCH) {
1942  SCLogDebug("%p/%" PRIu64
1943  " inspecting: sid %u (%u), flags %08x DE_STATE_FLAG_SIG_CANT_MATCH",
1944  tx.tx_ptr, tx.tx_id, s->id, s->iid, *inspect_flags);
1945  continue;
1946  }
1947  }
1948 
1949  if (inspect_flags) {
1950  /* continue previous inspection */
1951  SCLogDebug("%p/%" PRIu64 " Continuing sid %u", tx.tx_ptr, tx.tx_id, s->id);
1952  } else {
1953  /* start new inspection */
1954  SCLogDebug("%p/%"PRIu64" Start sid %u", tx.tx_ptr, tx.tx_id, s->id);
1955  }
1956 
1957  bool last_for_progress = false;
1958  if (have_fw_rules) {
1959  int fw_r = DetectRunTxCheckFirewallPolicy(det_ctx, p, f, &tx, s, i, array_idx,
1960  &skip_fw_hook, skip_before_progress, &last_for_progress,
1961  &fw_next_progress_missing);
1962  if (fw_r == -1)
1963  continue;
1964  if (fw_r == 1)
1965  break;
1966  }
1967 
1968  /* call individual rule inspection */
1970  const int r = DetectRunTxInspectRule(tv, de_ctx, det_ctx, p, f, flow_flags,
1971  alstate, &tx, s, inspect_flags, can, scratch);
1972  if (r == 1) {
1973  /* match */
1974  DetectRunPostMatch(tv, det_ctx, p, s);
1975 
1976  /* see if we need to apply tx/hook accept to the packet. This can be needed when
1977  * we've completed the inspection so far for an incomplete tx, and an accept:tx or
1978  * accept:hook is the last match.*/
1979  const bool fw_accept_to_packet = ApplyAcceptToPacket(total_txs, &tx, s);
1980 
1981  uint8_t alert_flags = (PACKET_ALERT_FLAG_STATE_MATCH | PACKET_ALERT_FLAG_TX);
1982  if (fw_accept_to_packet) {
1983  SCLogDebug("accept:(tx|hook): should be applied to the packet");
1985  }
1986 
1987  SCLogDebug(
1988  "%p/%" PRIu64 " sig %u (%u) matched", tx.tx_ptr, tx.tx_id, s->id, s->iid);
1989  AlertQueueAppend(det_ctx, s, p, tx.tx_id, alert_flags);
1990 
1991  if ((s->flags & SIG_FLAG_FIREWALL) && (s->action & ACTION_ACCEPT)) {
1992  break_out_of_app_filter = ApplyAccept(p, flow_flags, s, &tx, tx_end_state,
1993  fw_next_progress_missing, &tx_fw_verdict, &skip_fw_hook,
1994  &skip_before_progress);
1995  }
1996  } else if (last_for_progress) {
1997  SCLogDebug("sid %u: not a match: %s rule, last_for_progress %s", s->id,
1998  (s->flags & SIG_FLAG_FIREWALL) ? "firewall" : "regular",
1999  BOOL2STR(last_for_progress));
2000  if (s->flags & SIG_FLAG_FIREWALL) {
2001  SCLogDebug("%" PRIu64 ": %s default drop for progress", p->pcap_cnt,
2002  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient");
2003  /* if this rule was the last for our progress state, and it didn't match,
2004  * we have to invoke the default drop policy. */
2006  p->flow->flags |= FLOW_ACTION_DROP;
2007  break_out_of_app_filter = true;
2008  tx_fw_verdict = true;
2009  }
2010  }
2011  DetectVarProcessList(det_ctx, p->flow, p);
2012  RULE_PROFILING_END(det_ctx, s, r, p);
2013 
2014  if (det_ctx->post_rule_work_queue.len > 0) {
2015  SCLogDebug("%p/%" PRIu64 " post_rule_work_queue len %u", tx.tx_ptr, tx.tx_id,
2016  det_ctx->post_rule_work_queue.len);
2017  /* run post match prefilter engines on work queue */
2018  PrefilterPostRuleMatch(det_ctx, scratch->sgh, p, f);
2019 
2020  uint32_t prev_array_idx = array_idx;
2021  for (uint32_t j = 0; j < det_ctx->pmq.rule_id_array_cnt; j++) {
2022  const Signature *ts = de_ctx->sig_array[det_ctx->pmq.rule_id_array[j]];
2023  if (ts->app_inspect != NULL) {
2024  const SigIntId id = ts->iid;
2025  det_ctx->tx_candidates[array_idx].s = ts;
2026  det_ctx->tx_candidates[array_idx].id = id;
2027  det_ctx->tx_candidates[array_idx].flags = NULL;
2028  det_ctx->tx_candidates[array_idx].stream_reset = 0;
2029  array_idx++;
2030 
2031  SCLogDebug("%p/%" PRIu64 " rule %u (%u) added from 'post match' prefilter",
2032  tx.tx_ptr, tx.tx_id, ts->id, id);
2033  }
2034  }
2035  SCLogDebug("%p/%" PRIu64 " rules added from 'post match' prefilter: %u", tx.tx_ptr,
2036  tx.tx_id, array_idx - prev_array_idx);
2037  if (prev_array_idx != array_idx) {
2038  /* sort, but only part of array we're still going to process */
2039  qsort(det_ctx->tx_candidates + i, array_idx - i, sizeof(RuleMatchCandidateTx),
2040  DetectRunTxSortHelper);
2041  }
2042  det_ctx->post_rule_work_queue.len = 0;
2043  PMQ_RESET(&det_ctx->pmq);
2044  }
2045 
2046  if (break_out_of_app_filter)
2047  break;
2048  }
2049  if (tx_fw_verdict)
2050  fw_verdicted++;
2051 
2052  det_ctx->tx_id = 0;
2053  det_ctx->tx_id_set = false;
2054  det_ctx->p = NULL;
2055 
2056  /* see if we have any updated state to store in the tx */
2057 
2058  /* this side of the tx is done */
2059  if (tx.tx_progress >= tx.tx_end_state) {
2060  SCLogDebug("%" PRIu64 ": %s tx done", p->pcap_cnt,
2061  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient");
2062  const uint8_t inspected_flag = (flow_flags & STREAM_TOSERVER)
2065  tx.tx_data_ptr->flags |= inspected_flag;
2066  SCLogDebug("%p/%" PRIu64 " tx is done for direction %s. Progress %02x", tx.tx_ptr,
2067  tx.tx_id, flow_flags & STREAM_TOSERVER ? "toserver" : "toclient",
2068  tx.detect_progress);
2069  }
2070 
2071  if (tx.detect_progress != tx.detect_progress_orig) {
2072  SCLogDebug("%" PRIu64 ": %s tx state change %u -> %u", p->pcap_cnt,
2073  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient", tx.detect_progress_orig,
2074  tx.detect_progress);
2075  SCLogDebug("%p/%" PRIu64 " Storing new progress %02x (was %02x)", tx.tx_ptr, tx.tx_id,
2077 
2078  StoreDetectProgress(&tx, flow_flags, tx.detect_progress);
2079  }
2080 
2081  InspectionBufferClean(det_ctx);
2082 
2083  next:
2084  if (!ires.has_next)
2085  break;
2086  }
2087 
2088  /* apply default policy if there were txs to inspect, we have fw rules and non of the rules
2089  * applied a policy. */
2090  SCLogDebug("packet %" PRIu64 ": tx_inspected %u fw_verdicted %u", p->pcap_cnt, tx_inspected,
2091  fw_verdicted);
2092  if (tx_inspected && have_fw_rules && tx_inspected != fw_verdicted) {
2093  SCLogDebug("%" PRIu64 ": %s default drop", p->pcap_cnt,
2094  flow_flags & STREAM_TOSERVER ? "toserver" : "toclient");
2096  p->flow->flags |= FLOW_ACTION_DROP;
2097  return;
2098  }
2099  /* if all tables have been bypassed, we accept:packet */
2100  if (tx_inspected == 0 && fw_verdicted == 0 && have_fw_rules) {
2101  DetectRunAppendDefaultAccept(det_ctx, p);
2102  }
2103 }
2104 
2105 static void DetectRunFrames(ThreadVars *tv, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
2106  Packet *p, Flow *f, DetectRunScratchpad *scratch)
2107 {
2108  const SigGroupHead *const sgh = scratch->sgh;
2109  const AppProto alproto = f->alproto;
2110 
2111  /* for TCP, limit inspection to pseudo packets or real packet that did
2112  * an app-layer update. */
2113  if (p->proto == IPPROTO_TCP && !PKT_IS_PSEUDOPKT(p) &&
2114  ((PKT_IS_TOSERVER(p) && (f->flags & FLOW_TS_APP_UPDATED) == 0) ||
2115  (PKT_IS_TOCLIENT(p) && (f->flags & FLOW_TC_APP_UPDATED) == 0))) {
2116  SCLogDebug("pcap_cnt %" PRIu64 ": %s: skip frame inspection for TCP w/o APP UPDATE",
2117  p->pcap_cnt, PKT_IS_TOSERVER(p) ? "toserver" : "toclient");
2118  return;
2119  }
2120  FramesContainer *frames_container = AppLayerFramesGetContainer(f);
2121  if (frames_container == NULL) {
2122  return;
2123  }
2124  Frames *frames;
2125  if (PKT_IS_TOSERVER(p)) {
2126  frames = &frames_container->toserver;
2127  } else {
2128  frames = &frames_container->toclient;
2129  }
2130 
2131  for (uint32_t idx = 0; idx < frames->cnt; idx++) {
2132  SCLogDebug("frame %u", idx);
2133  Frame *frame = FrameGetByIndex(frames, idx);
2134  if (frame == NULL) {
2135  continue;
2136  }
2137 
2138  det_ctx->frame_inspect_progress = 0;
2139  uint32_t array_idx = 0;
2140  uint32_t total_rules = det_ctx->match_array_cnt;
2141 
2142  /* run prefilter engines and merge results into a candidates array */
2143  if (sgh->frame_engines) {
2144  // PACKET_PROFILING_DETECT_START(p, PROF_DETECT_PF_TX);
2145  DetectRunPrefilterFrame(det_ctx, sgh, p, frames, frame, alproto);
2146  // PACKET_PROFILING_DETECT_END(p, PROF_DETECT_PF_TX);
2147  SCLogDebug("%p/%" PRIi64 " rules added from prefilter: %u candidates", frame, frame->id,
2148  det_ctx->pmq.rule_id_array_cnt);
2149 
2150  total_rules += det_ctx->pmq.rule_id_array_cnt;
2151 
2152  if (!(RuleMatchCandidateTxArrayHasSpace(
2153  det_ctx, total_rules))) { // TODO is it safe to overload?
2154  RuleMatchCandidateTxArrayExpand(det_ctx, total_rules);
2155  }
2156 
2157  for (uint32_t i = 0; i < det_ctx->pmq.rule_id_array_cnt; i++) {
2158  const Signature *s = de_ctx->sig_array[det_ctx->pmq.rule_id_array[i]];
2159  const SigIntId id = s->iid;
2160  det_ctx->tx_candidates[array_idx].s = s;
2161  det_ctx->tx_candidates[array_idx].id = id;
2162  det_ctx->tx_candidates[array_idx].flags = NULL;
2163  det_ctx->tx_candidates[array_idx].stream_reset = 0;
2164  array_idx++;
2165  }
2166  PMQ_RESET(&det_ctx->pmq);
2167  }
2168  /* merge 'state' rules from the regular prefilter */
2169  uint32_t x = array_idx;
2170  for (uint32_t i = 0; i < det_ctx->match_array_cnt; i++) {
2171  const Signature *s = det_ctx->match_array[i];
2172  if (s->frame_inspect != NULL) {
2173  const SigIntId id = s->iid;
2174  det_ctx->tx_candidates[array_idx].s = s;
2175  det_ctx->tx_candidates[array_idx].id = id;
2176  det_ctx->tx_candidates[array_idx].flags = NULL;
2177  det_ctx->tx_candidates[array_idx].stream_reset = 0;
2178  array_idx++;
2179 
2180  SCLogDebug("%p/%" PRIi64 " rule %u (%u) added from 'match' list", frame, frame->id,
2181  s->id, id);
2182  }
2183  }
2184  SCLogDebug("%p/%" PRIi64 " rules added from 'match' list: %u", frame, frame->id,
2185  array_idx - x);
2186  (void)x;
2187 
2188  /* run rules: inspect the match candidates */
2189  for (uint32_t i = 0; i < array_idx; i++) {
2190  const Signature *s = det_ctx->tx_candidates[i].s;
2191 
2192  /* deduplicate: rules_array is sorted, but not deduplicated.
2193  * As they are back to back in that case we can check for it
2194  * here. We select the stored state one as that comes first
2195  * in the array. */
2196  while ((i + 1) < array_idx &&
2197  det_ctx->tx_candidates[i].s == det_ctx->tx_candidates[i + 1].s) {
2198  i++;
2199  }
2200  SCLogDebug("%p/%" PRIi64 " inspecting: sid %u (%u)", frame, frame->id, s->id, s->iid);
2201 
2202  /* start new inspection */
2203  SCLogDebug("%p/%" PRIi64 " Start sid %u", frame, frame->id, s->id);
2204 
2205  /* call individual rule inspection */
2207  bool r = DetectRunInspectRuleHeader(p, f, s, s->flags, s->proto.flags);
2208  if (r) {
2209  r = DetectRunFrameInspectRule(tv, det_ctx, s, f, p, frames, frame);
2210  if (r) {
2211  /* match */
2212  DetectRunPostMatch(tv, det_ctx, p, s);
2213 
2214  uint8_t alert_flags = (PACKET_ALERT_FLAG_STATE_MATCH | PACKET_ALERT_FLAG_FRAME);
2215  det_ctx->frame_id = frame->id;
2216  SCLogDebug(
2217  "%p/%" PRIi64 " sig %u (%u) matched", frame, frame->id, s->id, s->iid);
2218  if (frame->flags & FRAME_FLAG_TX_ID_SET) {
2219  alert_flags |= PACKET_ALERT_FLAG_TX;
2220  }
2221  AlertQueueAppend(det_ctx, s, p, frame->tx_id, alert_flags);
2222  }
2223  }
2224  DetectVarProcessList(det_ctx, p->flow, p);
2225  RULE_PROFILING_END(det_ctx, s, r, p);
2226  }
2227 
2228  /* update Frame::inspect_progress here instead of in the code above. The reason is that a
2229  * frame might be used more than once in buffers with transforms. */
2230  if (frame->inspect_progress < det_ctx->frame_inspect_progress) {
2231  frame->inspect_progress = det_ctx->frame_inspect_progress;
2232  SCLogDebug("frame->inspect_progress: %" PRIu64 " -> updated", frame->inspect_progress);
2233  } else {
2234  SCLogDebug(
2235  "frame->inspect_progress: %" PRIu64 " -> not updated", frame->inspect_progress);
2236  }
2237 
2238  SCLogDebug("%p/%" PRIi64 " rules inspected, running cleanup", frame, frame->id);
2239  InspectionBufferClean(det_ctx);
2240  }
2241 }
2242 
2243 static DetectEngineThreadCtx *GetTenantById(HashTable *h, uint32_t id)
2244 {
2245  /* technically we need to pass a DetectEngineThreadCtx struct with the
2246  * tenant_id member. But as that member is the first in the struct, we
2247  * can use the id directly. */
2248  return HashTableLookup(h, &id, 0);
2249 }
2250 
2251 static void DetectFlow(ThreadVars *tv,
2253  Packet *p)
2254 {
2255  Flow *const f = p->flow;
2256 
2257  /* we check the flow drop here, and not the packet drop. This is
2258  * to allow stream engine "invalid" drop packets to still be
2259  * evaluated by the stream event rules. */
2260  if (f->flags & FLOW_ACTION_DROP) {
2262  SCReturn;
2263  }
2264 
2265  /* in firewall mode, we still need to run the fw rulesets even for exception policy pass */
2266  bool skip = false;
2267  if (EngineModeIsFirewall()) {
2268  skip = (f->flags & (FLOW_ACTION_ACCEPT));
2269 
2270  } else {
2271  skip = (p->flags & PKT_NOPACKET_INSPECTION || f->flags & (FLOW_ACTION_PASS));
2272  }
2273  if (skip) {
2274  /* enfore prior accept:flow */
2275  if (f->flags & FLOW_ACTION_ACCEPT) {
2276  p->action |= ACTION_ACCEPT;
2277  }
2278  /* hack: if we are in pass the entire flow mode, we need to still
2279  * update the inspect_id forward. So test for the condition here,
2280  * and call the update code if necessary. */
2281  const int pass = (f->flags & (FLOW_ACTION_PASS | FLOW_ACTION_ACCEPT));
2282  if (pass) {
2283  uint8_t flags = STREAM_FLAGS_FOR_PACKET(p);
2285  if (f->alstate) {
2287  }
2288  }
2289  SCLogDebug("p->pcap %"PRIu64": no detection on packet, "
2290  "PKT_NOPACKET_INSPECTION is set", p->pcap_cnt);
2291  return;
2292  }
2293 
2294  /* see if the packet matches one or more of the sigs */
2295  DetectRun(tv, de_ctx, det_ctx, p);
2296 }
2297 
2298 
2299 static void DetectNoFlow(ThreadVars *tv,
2301  Packet *p)
2302 {
2303  /* No need to perform any detection on this packet, if the given flag is set.*/
2305  return;
2306  }
2307 
2308  /* see if the packet matches one or more of the sigs */
2309  DetectRun(tv, de_ctx, det_ctx, p);
2310 }
2311 
2313 {
2314  const DetectEngineCtx *de_ctx = det_ctx->de_ctx;
2315  const SigGroupHead *sgh = de_ctx->pre_flow_sgh;
2316 
2317  SCLogDebug("thread id: %u, packet %" PRIu64 ", sgh %p", tv->id, p->pcap_cnt, sgh);
2318  DetectRunPacketHook(tv, de_ctx, det_ctx, sgh, p);
2319  return p->action;
2320 }
2321 
2323 {
2324  const DetectEngineCtx *de_ctx = det_ctx->de_ctx;
2325  const int direction = (PKT_IS_TOCLIENT(p) != 0);
2326  const SigGroupHead *sgh = de_ctx->pre_stream_sgh[direction];
2327 
2328  SCLogDebug("thread id: %u, packet %" PRIu64 ", sgh %p", tv->id, p->pcap_cnt, sgh);
2329  DetectRunPacketHook(tv, de_ctx, det_ctx, sgh, p);
2330  return p->action;
2331 }
2332 
2333 /** \brief Detection engine thread wrapper.
2334  * \param tv thread vars
2335  * \param p packet to inspect
2336  * \param data thread specific data
2337  * \param pq packet queue
2338  * \retval TM_ECODE_FAILED error
2339  * \retval TM_ECODE_OK ok
2340  */
2341 TmEcode Detect(ThreadVars *tv, Packet *p, void *data)
2342 {
2344 
2345  DetectEngineCtx *de_ctx = NULL;
2346  DetectEngineThreadCtx *det_ctx = (DetectEngineThreadCtx *)data;
2347  if (det_ctx == NULL) {
2348  printf("ERROR: Detect has no thread ctx\n");
2349  goto error;
2350  }
2351 
2352  if (unlikely(SC_ATOMIC_GET(det_ctx->so_far_used_by_detect) == 0)) {
2353  (void)SC_ATOMIC_SET(det_ctx->so_far_used_by_detect, 1);
2354  SCLogDebug("Detect Engine using new det_ctx - %p",
2355  det_ctx);
2356  }
2357 
2358  /* if in MT mode _and_ we have tenants registered, use
2359  * MT logic. */
2360  if (det_ctx->mt_det_ctxs_cnt > 0 && det_ctx->TenantGetId != NULL)
2361  {
2362  uint32_t tenant_id = p->tenant_id;
2363  if (tenant_id == 0)
2364  tenant_id = det_ctx->TenantGetId(det_ctx, p);
2365  if (tenant_id > 0 && tenant_id < det_ctx->mt_det_ctxs_cnt) {
2366  p->tenant_id = tenant_id;
2367  det_ctx = GetTenantById(det_ctx->mt_det_ctxs_hash, tenant_id);
2368  if (det_ctx == NULL)
2369  return TM_ECODE_OK;
2370  de_ctx = det_ctx->de_ctx;
2371  if (de_ctx == NULL)
2372  return TM_ECODE_OK;
2373 
2374  if (unlikely(SC_ATOMIC_GET(det_ctx->so_far_used_by_detect) == 0)) {
2375  (void)SC_ATOMIC_SET(det_ctx->so_far_used_by_detect, 1);
2376  SCLogDebug("MT de_ctx %p det_ctx %p (tenant %u)", de_ctx, det_ctx, tenant_id);
2377  }
2378  } else {
2379  /* use default if no tenants are registered for this packet */
2380  de_ctx = det_ctx->de_ctx;
2381  }
2382  } else {
2383  de_ctx = det_ctx->de_ctx;
2384  }
2385 
2386  if (p->flow) {
2387  DetectFlow(tv, de_ctx, det_ctx, p);
2388  } else {
2389  DetectNoFlow(tv, de_ctx, det_ctx, p);
2390  }
2391 
2392 #ifdef PROFILE_RULES
2393  /* aggregate statistics */
2394  struct timeval ts;
2395  gettimeofday(&ts, NULL);
2396  if (ts.tv_sec != det_ctx->rule_perf_last_sync) {
2397  SCProfilingRuleThreatAggregate(det_ctx);
2398  det_ctx->rule_perf_last_sync = ts.tv_sec;
2399  }
2400 #endif
2401 
2402  return TM_ECODE_OK;
2403 error:
2404  return TM_ECODE_FAILED;
2405 }
2406 
2407 /** \brief disable file features we don't need
2408  * Called if we have no detection engine.
2409  */
2411 {
2412  DetectPostInspectFileFlagsUpdate(f, NULL /* no sgh */, STREAM_TOSERVER);
2413  DetectPostInspectFileFlagsUpdate(f, NULL /* no sgh */, STREAM_TOCLIENT);
2414 }
2415 
2416 #ifdef UNITTESTS
2417 /**
2418  * \brief wrapper for old tests
2419  */
2422 {
2423  if (p->flow) {
2424  DetectFlow(tv, de_ctx, det_ctx, p);
2425  } else {
2426  DetectNoFlow(tv, de_ctx, det_ctx, p);
2427  }
2428 }
2429 #endif
2430 
2431 /*
2432  * TESTS
2433  */
2434 
2435 #ifdef UNITTESTS
2436 #include "tests/detect.c"
2437 #endif
PKT_IS_TOCLIENT
#define PKT_IS_TOCLIENT(p)
Definition: decode.h:239
default_accept
thread_local Signature default_accept
Definition: detect.c:1619
DetectEngineAppInspectionEngine_::stream
bool stream
Definition: detect.h:421
PacketCheckAction
bool PacketCheckAction(const Packet *p, const uint8_t a)
Definition: packet.c:49
FLOWFILE_NO_MD5_TS
#define FLOWFILE_NO_MD5_TS
Definition: flow.h:137
RulesDumpTxMatchArray
void RulesDumpTxMatchArray(const DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, const Packet *p, const uint64_t tx_id, const uint32_t rule_cnt, const uint32_t pkt_prefilter_cnt)
Definition: detect-engine-profile.c:34
SIG_GROUP_HEAD_HAVEFILEMD5
#define SIG_GROUP_HEAD_HAVEFILEMD5
Definition: detect.h:1492
PACKET_ALERT_FLAG_TX_GUESSED
#define PACKET_ALERT_FLAG_TX_GUESSED
Definition: decode.h:278
FLOWFILE_NO_MD5_TC
#define FLOWFILE_NO_MD5_TC
Definition: flow.h:138
SigGroupHead_::tx_engines
PrefilterEngine * tx_engines
Definition: detect.h:1641
DetectEngineAppInspectionEngine_
Definition: detect.h:416
Packet_::proto
uint8_t proto
Definition: decode.h:523
DetectTransaction_::tx_data_ptr
struct AppLayerTxData * tx_data_ptr
Definition: detect-engine-prefilter.h:34
DetectEngineAppInspectionEngine_::mpm
bool mpm
Definition: detect.h:420
DE_STATE_CHUNK_SIZE
#define DE_STATE_CHUNK_SIZE
Definition: detect-engine-state.h:52
RuleMatchCandidateTx::stream_stored
bool stream_stored
Definition: detect.h:1203
FLOWFILE_NO_SIZE_TS
#define FLOWFILE_NO_SIZE_TS
Definition: flow.h:149
Frame::inspect_progress
uint64_t inspect_progress
Definition: app-layer-frames.h:55
DetectEngineThreadCtx_::alert_queue_size
uint16_t alert_queue_size
Definition: detect.h:1329
PROF_DETECT_GETSGH
@ PROF_DETECT_GETSGH
Definition: suricata-common.h:458
ts
uint64_t ts
Definition: source-erf-file.c:55
SCAppLayerParserStateIssetFlag
uint16_t SCAppLayerParserStateIssetFlag(AppLayerParserState *pstate, uint16_t flag)
Definition: app-layer-parser.c:1829
FLOWFILE_NO_SIZE_TC
#define FLOWFILE_NO_SIZE_TC
Definition: flow.h:150
detect-engine.h
detect-engine-proto.h
DetectEngineThreadCtx_::match_array_cnt
SigIntId match_array_cnt
Definition: detect.h:1340
Frame::tx_id
uint64_t tx_id
Definition: app-layer-frames.h:54
DetectEngineStateDirection_::flags
uint8_t flags
Definition: detect-engine-state.h:88
detect-dsize.h
Signature_::addr_src_match6
DetectMatchAddressIPv6 * addr_src_match6
Definition: detect.h:711
sigmatch_table
SigTableElmt * sigmatch_table
Definition: detect-parse.c:79
PKT_HAS_FLOW
#define PKT_HAS_FLOW
Definition: decode.h:1264
DetectEngineCtx_::decoder_event_sgh
struct SigGroupHead_ * decoder_event_sgh
Definition: detect.h:1017
FlowGetPacketDirection
int FlowGetPacketDirection(const Flow *f, const Packet *p)
determine the direction of the packet compared to the flow
Definition: flow.c:279
DetectEngineCtx_::flow_gh
DetectEngineLookupFlow flow_gh[FLOW_STATES]
Definition: detect.h:959
DE_STATE_FLAG_SIG_CANT_MATCH
#define DE_STATE_FLAG_SIG_CANT_MATCH
Definition: detect-engine-state.h:56
DetectEngineThreadCtx_::counter_match_list
uint16_t counter_match_list
Definition: detect.h:1298
ALPROTO_DNS
@ ALPROTO_DNS
Definition: app-layer-protos.h:47
DetectEngineAppInspectionEngine_::next
struct DetectEngineAppInspectionEngine_ * next
Definition: detect.h:441
DETECT_PROTO_IPV6
#define DETECT_PROTO_IPV6
Definition: detect-engine-proto.h:32
detect-engine-siggroup.h
SigGroupHead_::flags
uint16_t flags
Definition: detect.h:1630
APP_LAYER_TX_SKIP_INSPECT_TC
#define APP_LAYER_TX_SKIP_INSPECT_TC
Definition: app-layer-parser.h:68
PostRuleMatchWorkQueue::len
uint32_t len
Definition: detect.h:1227
PKT_IS_PSEUDOPKT
#define PKT_IS_PSEUDOPKT(p)
return 1 if the packet is a pseudo packet
Definition: decode.h:1319
DetectEngineState_
Definition: detect-engine-state.h:92
stream-tcp.h
PrefilterRuleStore_::rule_id_array_cnt
uint32_t rule_id_array_cnt
Definition: util-prefilter.h:40
detect-engine-event.h
SigGroupHead_
Container for matching data for a signature group.
Definition: detect.h:1629
SIG_GROUP_HEAD_HAVEFILESIZE
#define SIG_GROUP_HEAD_HAVEFILESIZE
Definition: detect.h:1493
PACKET_ALERT_FLAG_STATE_MATCH
#define PACKET_ALERT_FLAG_STATE_MATCH
Definition: decode.h:268
DetectEngineCtx_::guess_applayer
bool guess_applayer
Definition: detect.h:979
unlikely
#define unlikely(expr)
Definition: util-optimize.h:35
detect.c
SC_ATOMIC_SET
#define SC_ATOMIC_SET(name, val)
Set the value for the atomic variable.
Definition: util-atomic.h:386
Signature_::app_progress_hook
uint8_t app_progress_hook
Definition: detect.h:705
KEYWORD_PROFILING_SET_LIST
#define KEYWORD_PROFILING_SET_LIST(ctx, list)
Definition: util-profiling.h:46
DetectAddressMatchIPv4
int DetectAddressMatchIPv4(const DetectMatchAddressIPv4 *addrs, uint16_t addrs_cnt, const Address *a)
Match a packets address against a signatures addrs array.
Definition: detect-engine-address.c:1589
DetectEngineAppInspectionEngine_::Callback
InspectEngineFuncPtr Callback
Definition: detect.h:434
Signature_::alproto
AppProto alproto
Definition: detect.h:673
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:275
FLOW_SGH_TOCLIENT
#define FLOW_SGH_TOCLIENT
Definition: flow.h:75
Packet_::pcap_cnt
uint64_t pcap_cnt
Definition: decode.h:626
AppLayerParserSetTransactionInspectId
void AppLayerParserSetTransactionInspectId(const Flow *f, AppLayerParserState *pstate, void *alstate, const uint8_t flags, bool tag_txs_as_inspected)
Definition: app-layer-parser.c:754
DetectEngineStateDirection_::cnt
SigIntId cnt
Definition: detect-engine-state.h:86
AppLayerGetTxIterator
AppLayerGetTxIteratorFunc AppLayerGetTxIterator(const uint8_t ipproto, const AppProto alproto)
Definition: app-layer-parser.c:707
next
struct HtpBodyChunk_ * next
Definition: app-layer-htp.h:0
SigMatchData_::is_last
bool is_last
Definition: detect.h:367
InspectionBufferClean
void InspectionBufferClean(DetectEngineThreadCtx *det_ctx)
Definition: detect-engine-inspect-buffer.c:30
Flow_::proto
uint8_t proto
Definition: flow.h:378
AppProto
uint16_t AppProto
Definition: app-layer-protos.h:86
PacketAlerts_::cnt
uint16_t cnt
Definition: decode.h:287
AppLayerParserGetStateProgress
int AppLayerParserGetStateProgress(uint8_t ipproto, AppProto alproto, void *alstate, uint8_t flags)
get the progress value for a tx/protocol
Definition: app-layer-parser.c:1087
DetectEngineThreadCtx_::tx_id
uint64_t tx_id
Definition: detect.h:1320
SigMatchData_::ctx
SigMatchCtx * ctx
Definition: detect.h:368
action-globals.h
FLOWFILE_NO_MAGIC_TS
#define FLOWFILE_NO_MAGIC_TS
Definition: flow.h:130
FramesContainer::toserver
Frames toserver
Definition: app-layer-frames.h:74
Packet_::flags
uint32_t flags
Definition: decode.h:544
Packet_::action
uint8_t action
Definition: decode.h:609
ICMPV4_DEST_UNREACH_IS_VALID
#define ICMPV4_DEST_UNREACH_IS_VALID(p)
Definition: decode-icmpv4.h:253
Frame
Definition: app-layer-frames.h:45
Flow_
Flow data structure.
Definition: flow.h:356
DetectTransaction_::tx_end_state
const int tx_end_state
Definition: detect-engine-prefilter.h:44
PROF_DETECT_ALERT
@ PROF_DETECT_ALERT
Definition: suricata-common.h:469
DetectEngineThreadCtx_::pmq
PrefilterRuleStore pmq
Definition: detect.h:1349
SIG_GROUP_HEAD_HAVEFILESHA1
#define SIG_GROUP_HEAD_HAVEFILESHA1
Definition: detect.h:1494
FLOW_TC_APP_UPDATED
#define FLOW_TC_APP_UPDATED
Definition: flow.h:120
DetectEngineCtx_
main detection engine ctx
Definition: detect.h:932
AppLayerParserGetStateProgressCompletionStatus
int AppLayerParserGetStateProgressCompletionStatus(AppProto alproto, uint8_t direction)
Definition: app-layer-parser.c:1116
DetectEngineCtx_::pre_stream_sgh
struct SigGroupHead_ * pre_stream_sgh[2]
Definition: detect.h:1155
DetectRunScratchpad
struct DetectRunScratchpad DetectRunScratchpad
PROF_DETECT_PF_TX
@ PROF_DETECT_PF_TX
Definition: suricata-common.h:464
Frames::cnt
uint16_t cnt
Definition: app-layer-frames.h:61
Frame::id
int64_t id
Definition: app-layer-frames.h:53
DetectEngineThreadCtx_::p
Packet * p
Definition: detect.h:1324
DetectEngineState_::dir_state
DetectEngineStateDirection dir_state[2]
Definition: detect-engine-state.h:93
FrameGetByIndex
Frame * FrameGetByIndex(Frames *frames, const uint32_t idx)
Definition: app-layer-frames.c:144
RuleMatchCandidateTx::id
SigIntId id
Definition: detect.h:1199
PROF_DETECT_CLEANUP
@ PROF_DETECT_CLEANUP
Definition: suricata-common.h:471
SIG_FLAG_DST_ANY
#define SIG_FLAG_DST_ANY
Definition: detect.h:242
ACTION_SCOPE_FLOW
@ ACTION_SCOPE_FLOW
Definition: action-globals.h:45
NO_TX
#define NO_TX
Definition: detect.c:1397
FLOW_PKT_TOSERVER
#define FLOW_PKT_TOSERVER
Definition: flow.h:233
HashTable_
Definition: util-hash.h:35
SIG_FLAG_TXBOTHDIR
#define SIG_FLAG_TXBOTHDIR
Definition: detect.h:250
Packet_::sig_mask
SignatureMask sig_mask
Definition: decode.h:538
Frames
Definition: app-layer-frames.h:60
FramesContainer
Definition: app-layer-frames.h:73
PacketAlerts_::drop
PacketAlert drop
Definition: decode.h:293
AppLayerTxData
struct AppLayerTxData AppLayerTxData
Definition: app-layer-parser.h:42
DetectRunScratchpad
Definition: detect.c:69
SIG_GROUP_HEAD_HAVERAWSTREAM
#define SIG_GROUP_HEAD_HAVERAWSTREAM
Definition: detect.h:1488
FLOW_ACTION_DROP
#define FLOW_ACTION_DROP
Definition: flow.h:70
TcpStream_::flags
uint16_t flags
Definition: stream-tcp-private.h:107
FLOWFILE_NONE
#define FLOWFILE_NONE
Definition: flow.h:168
detect-engine-frame.h
SigMatchSignatures
void SigMatchSignatures(ThreadVars *tv, DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, Packet *p)
wrapper for old tests
Definition: detect.c:2420
Signature_::sm_arrays
SigMatchData * sm_arrays[DETECT_SM_LIST_MAX]
Definition: detect.h:731
proto
uint8_t proto
Definition: decode-template.h:0
m
SCMutex m
Definition: flow-hash.h:6
DetectPort_::sh
struct SigGroupHead_ * sh
Definition: detect.h:231
PKT_NOPAYLOAD_INSPECTION
#define PKT_NOPAYLOAD_INSPECTION
Definition: decode.h:1250
PACKET_PROFILING_DETECT_END
#define PACKET_PROFILING_DETECT_END(p, id)
Definition: util-profiling.h:221
Detect
TmEcode Detect(ThreadVars *tv, Packet *p, void *data)
Detection engine thread wrapper.
Definition: detect.c:2341
detect-engine-payload.h
Packet_::flowflags
uint8_t flowflags
Definition: decode.h:532
EngineModeIsFirewall
bool EngineModeIsFirewall(void)
Definition: suricata.c:235
SIG_FLAG_SRC_ANY
#define SIG_FLAG_SRC_ANY
Definition: detect.h:241
TM_ECODE_FAILED
@ TM_ECODE_FAILED
Definition: tm-threads-common.h:82
DetectRunFrameInspectRule
bool DetectRunFrameInspectRule(ThreadVars *tv, DetectEngineThreadCtx *det_ctx, const Signature *s, Flow *f, Packet *p, const Frames *frames, const Frame *frame)
Definition: detect-engine-frame.c:228
Flow_::protoctx
void * protoctx
Definition: flow.h:441
SigMatchData_
Data needed for Match()
Definition: detect.h:365
DeStateStoreItem_::sid
SigIntId sid
Definition: detect-engine-state.h:74
RuleMatchCandidateTx::s
const Signature * s
Definition: detect.h:1209
KEYWORD_PROFILING_START
#define KEYWORD_PROFILING_START
Definition: util-profiling.h:50
SigMatchData_::type
uint16_t type
Definition: detect.h:366
DetectEngineCtx_::version
uint32_t version
Definition: detect.h:1013
DisableDetectFlowFileFlags
void DisableDetectFlowFileFlags(Flow *f)
disable file features we don't need Called if we have no detection engine.
Definition: detect.c:2410
AppLayerParserGetTransactionInspectId
uint64_t AppLayerParserGetTransactionInspectId(AppLayerParserState *pstate, uint8_t direction)
Definition: app-layer-parser.c:732
Packet_::alerts
PacketAlerts alerts
Definition: decode.h:620
DetectTransaction_::tx_progress
const int tx_progress
Definition: detect-engine-prefilter.h:43
detect-engine-prefilter.h
DetectRunPrefilterFrame
void DetectRunPrefilterFrame(DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, Packet *p, const Frames *frames, const Frame *frame, const AppProto alproto)
Definition: detect-engine-frame.c:73
Packet_::events
PacketEngineEvents events
Definition: decode.h:630
Signature_::frame_inspect
DetectEngineFrameInspectionEngine * frame_inspect
Definition: detect.h:727
PROF_DETECT_PF_SORT2
@ PROF_DETECT_PF_SORT2
Definition: suricata-common.h:467
pad
uint16_t pad
Definition: source-erf-file.c:61
TM_ECODE_OK
@ TM_ECODE_OK
Definition: tm-threads-common.h:81
PacketCreateMask
void PacketCreateMask(Packet *p, SignatureMask *mask, AppProto alproto, bool app_decoder_events)
Definition: detect-engine-build.c:420
SIG_FLAG_APPLAYER
#define SIG_FLAG_APPLAYER
Definition: detect.h:249
KEYWORD_PROFILING_END
#define KEYWORD_PROFILING_END(ctx, type, m)
Definition: util-profiling.h:64
detect-flowvar.h
DetectEngineThreadCtx_::mt_det_ctxs_hash
HashTable * mt_det_ctxs_hash
Definition: detect.h:1256
PacketAlert_::action
uint8_t action
Definition: decode.h:250
TcpSession_::flags
uint32_t flags
Definition: stream-tcp-private.h:294
DetectEnginePktInspectionRun
bool DetectEnginePktInspectionRun(ThreadVars *tv, DetectEngineThreadCtx *det_ctx, const Signature *s, Flow *f, Packet *p, uint8_t *alert_flags)
Definition: detect-engine.c:1814
SIG_FLAG_FIREWALL
#define SIG_FLAG_FIREWALL
Definition: detect.h:246
Flow_::sgh_toserver
const struct SigGroupHead_ * sgh_toserver
Definition: flow.h:486
PROF_DETECT_TX_UPDATE
@ PROF_DETECT_TX_UPDATE
Definition: suricata-common.h:470
DetectEngineAppInspectionEngine_::id
uint8_t id
Definition: detect.h:419
DetectEngineThreadCtx_::counter_alerts_suppressed
uint16_t counter_alerts_suppressed
Definition: detect.h:1293
DetectRunStoreStateTx
void DetectRunStoreStateTx(const SigGroupHead *sgh, Flow *f, void *tx, uint64_t tx_id, const Signature *s, uint32_t inspect_flags, uint8_t flow_flags, const uint16_t file_no_match)
Definition: detect-engine-state.c:214
DetectEngineAppInspectionEngine_::sm_list
uint16_t sm_list
Definition: detect.h:424
FLOWFILE_INIT
#define FLOWFILE_INIT
Definition: flow.h:127
Flow_::alparser
AppLayerParserState * alparser
Definition: flow.h:478
FLOW_ACTION_PASS
#define FLOW_ACTION_PASS
Definition: flow.h:117
DETECT_ENGINE_INSPECT_SIG_CANT_MATCH_FILES
#define DETECT_ENGINE_INSPECT_SIG_CANT_MATCH_FILES
Definition: detect-engine-state.h:43
FLOWFILE_NO_SHA1_TC
#define FLOWFILE_NO_SHA1_TC
Definition: flow.h:142
DETECT_SM_LIST_POSTMATCH
@ DETECT_SM_LIST_POSTMATCH
Definition: detect.h:127
FramesContainer::toclient
Frames toclient
Definition: app-layer-frames.h:75
DetectEngineCtx_::pre_flow_sgh
struct SigGroupHead_ * pre_flow_sgh
Definition: detect.h:1160
DetectEngineThreadCtx_::tx_candidates
RuleMatchCandidateTx * tx_candidates
Definition: detect.h:1342
SIG_TYPE_PKT
@ SIG_TYPE_PKT
Definition: detect.h:72
PKT_DROP_REASON_DEFAULT_APP_POLICY
@ PKT_DROP_REASON_DEFAULT_APP_POLICY
Definition: decode.h:399
Signature_::addr_src_match4
DetectMatchAddressIPv4 * addr_src_match4
Definition: detect.h:708
decode.h
DetectEngineThreadCtx_::counter_alerts_overflow
uint16_t counter_alerts_overflow
Definition: detect.h:1291
PKT_SRC_WIRE
@ PKT_SRC_WIRE
Definition: decode.h:52
TOSERVER
#define TOSERVER
Definition: flow.h:45
de_ctx
DetectEngineCtx * de_ctx
Definition: fuzz_siginit.c:18
PKT_IS_TOSERVER
#define PKT_IS_TOSERVER(p)
Definition: decode.h:238
Prefilter
void Prefilter(DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, Packet *p, const uint8_t flags, const SignatureMask mask)
Definition: detect-engine-prefilter.c:216
DetectTransaction_::detect_progress_orig
const uint8_t detect_progress_orig
Definition: detect-engine-prefilter.h:41
DetectEngineThreadCtx_
Definition: detect.h:1244
DEBUG_VALIDATE_PACKET
#define DEBUG_VALIDATE_PACKET(p)
Definition: util-validate.h:101
DeStateStoreItem_::flags
uint32_t flags
Definition: detect-engine-state.h:73
PKT_STREAM_ADD
#define PKT_STREAM_ADD
Definition: decode.h:1258
DetectTransaction_::detect_progress
uint8_t detect_progress
Definition: detect-engine-prefilter.h:39
FLOWFILE_NO_STORE_TS
#define FLOWFILE_NO_STORE_TS
Definition: flow.h:134
AppLayerGetTxIterTuple
struct AppLayerGetTxIterTuple AppLayerGetTxIterTuple
Definition: app-layer-parser.h:40
BIT_U32
#define BIT_U32(n)
Definition: suricata-common.h:417
DetectEngineThreadCtx_::tx_candidates_size
uint32_t tx_candidates_size
Definition: detect.h:1343
FRAME_FLAG_TX_ID_SET
#define FRAME_FLAG_TX_ID_SET
Definition: app-layer-frames.h:38
PKT_PSEUDO_STREAM_END
#define PKT_PSEUDO_STREAM_END
Definition: decode.h:1266
PKT_IS_FRAGMENT
#define PKT_IS_FRAGMENT
Definition: decode.h:1288
BOOL2STR
#define BOOL2STR(b)
Definition: util-debug.h:535
STREAM_FLAGS_FOR_PACKET
#define STREAM_FLAGS_FOR_PACKET(p)
Definition: stream.h:30
SCEnter
#define SCEnter(...)
Definition: util-debug.h:277
PMQ_RESET
#define PMQ_RESET(pmq)
Definition: util-prefilter.h:46
detect-engine-mpm.h
DetectEngineLookupFlow_::sgh
struct SigGroupHead_ * sgh[256]
Definition: detect.h:864
HashTableLookup
void * HashTableLookup(HashTable *ht, void *data, uint16_t datalen)
Definition: util-hash.c:183
detect.h
ThreadVars_
Per thread variable structure.
Definition: threadvars.h:58
DeStateStore_::next
struct DeStateStore_ * next
Definition: detect-engine-state.h:79
DetectRunScratchpad::default_action
const uint8_t default_action
Definition: detect.c:79
Packet_::sp
Port sp
Definition: decode.h:508
FLOWFILE_NO_SHA256_TS
#define FLOWFILE_NO_SHA256_TS
Definition: flow.h:145
DETECT_ENGINE_INSPECT_SIG_MATCH
#define DETECT_ENGINE_INSPECT_SIG_MATCH
Definition: detect-engine-state.h:38
PKT_DETECT_HAS_STREAMDATA
#define PKT_DETECT_HAS_STREAMDATA
Definition: decode.h:1303
FLOW_PKT_TOCLIENT_FIRST
#define FLOW_PKT_TOCLIENT_FIRST
Definition: flow.h:237
StreamReassembleRawHasDataReady
bool StreamReassembleRawHasDataReady(TcpSession *ssn, Packet *p)
does the stream engine have data to inspect?
Definition: stream-tcp-reassemble.c:1512
detect-engine-port.h
PktSrcToString
const char * PktSrcToString(enum PktSrcEnum pkt_src)
Definition: decode.c:853
DetectPort_
Port structure for detection engine.
Definition: detect.h:220
PacketAlerts_::discarded
uint16_t discarded
Definition: decode.h:288
app-layer-parser.h
Signature_::app_inspect
DetectEngineAppInspectionEngine * app_inspect
Definition: detect.h:725
ThreadVars_::id
int id
Definition: threadvars.h:87
util-detect.h
detect-engine-profile.h
Flow_::sgh_toclient
const struct SigGroupHead_ * sgh_toclient
Definition: flow.h:483
DetectEngineThreadCtx_::base64_decoded_len
int base64_decoded_len
Definition: detect.h:1327
SIG_FLAG_REQUIRE_FLOWVAR
#define SIG_FLAG_REQUIRE_FLOWVAR
Definition: detect.h:267
RuleMatchCandidateTx::stream_result
uint8_t stream_result
Definition: detect.h:1204
Signature_::action
uint8_t action
Definition: detect.h:683
util-profiling.h
DetectTransaction_::tx_id
const uint64_t tx_id
Definition: detect-engine-prefilter.h:33
DetectEngineLookupFlow_::udp
DetectPort * udp
Definition: detect.h:863
DetectEngineThreadCtx_::raw_stream_progress
uint64_t raw_stream_progress
Definition: detect.h:1265
FileUpdateFlowFileFlags
void FileUpdateFlowFileFlags(Flow *f, uint16_t set_file_flags, uint8_t direction)
set a flow's file flags
Definition: util-file.c:1103
SCReturn
#define SCReturn
Definition: util-debug.h:279
Signature_::flags
uint32_t flags
Definition: detect.h:669
AlertQueueAppend
void AlertQueueAppend(DetectEngineThreadCtx *det_ctx, const Signature *s, Packet *p, uint64_t tx_id, uint8_t alert_flags)
Append signature to local packet alert queue for later preprocessing.
Definition: detect-engine-alert.c:353
RuleMatchCandidateTxArrayFree
void RuleMatchCandidateTxArrayFree(DetectEngineThreadCtx *det_ctx)
Definition: detect.c:1086
AppLayerGetTxIterState
Definition: app-layer-parser.h:134
Packet_
Definition: decode.h:501
detect-engine-build.h
AppLayerFramesGetContainer
FramesContainer * AppLayerFramesGetContainer(Flow *f)
Definition: app-layer-parser.c:184
ACTION_SCOPE_TX
@ ACTION_SCOPE_TX
Definition: action-globals.h:47
DetectEngineThreadCtx_::frame_id
int64_t frame_id
Definition: detect.h:1321
detect-engine-alert.h
DetectEngineThreadCtx_::filestore_cnt
uint16_t filestore_cnt
Definition: detect.h:1286
PROF_DETECT_IPONLY
@ PROF_DETECT_IPONLY
Definition: suricata-common.h:459
RULE_PROFILING_END
#define RULE_PROFILING_END(a, b, c, p)
Definition: util-profiling.h:422
TmEcode
TmEcode
Definition: tm-threads-common.h:80
RULE_PROFILING_START
#define RULE_PROFILING_START(p)
Definition: util-profiling.h:421
ALPROTO_DOH2
@ ALPROTO_DOH2
Definition: app-layer-protos.h:66
SCReturnPtr
#define SCReturnPtr(x, type)
Definition: util-debug.h:293
DetectPreFlow
uint8_t DetectPreFlow(ThreadVars *tv, DetectEngineThreadCtx *det_ctx, Packet *p)
Definition: detect.c:2312
DetectTransaction_::de_state
DetectEngineStateDirection * de_state
Definition: detect-engine-prefilter.h:35
detect-engine-state.h
Data structures and function prototypes for keeping state for the detection engine.
detect-filestore.h
SigTableElmt_::Match
int(* Match)(DetectEngineThreadCtx *, Packet *, const Signature *, const SigMatchCtx *)
Definition: detect.h:1421
detect-replace.h
RulesDumpMatchArray
void RulesDumpMatchArray(const DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, const Packet *p)
Definition: detect-engine-profile.c:78
ALPROTO_HTTP2
@ ALPROTO_HTTP2
Definition: app-layer-protos.h:69
Signature_::addr_dst_match6_cnt
uint16_t addr_dst_match6_cnt
Definition: detect.h:695
FLOW_PKT_TOCLIENT
#define FLOW_PKT_TOCLIENT
Definition: flow.h:234
SigGroupHead_::frame_engines
PrefilterEngine * frame_engines
Definition: detect.h:1642
PACKET_ALERT_NOTX
#define PACKET_ALERT_NOTX
Definition: detect.h:55
RunmodeIsUnittests
int RunmodeIsUnittests(void)
Definition: suricata.c:270
Signature_::sp
DetectPort * sp
Definition: detect.h:719
APP_LAYER_PARSER_NO_INSPECTION
#define APP_LAYER_PARSER_NO_INSPECTION
Definition: app-layer-parser.h:49
AppLayerParserGetTx
void * AppLayerParserGetTx(uint8_t ipproto, AppProto alproto, void *alstate, uint64_t tx_id)
Definition: app-layer-parser.c:1109
DetectRunScratchpad::sgh
const SigGroupHead * sgh
Definition: detect.c:80
PACKET_ALERT_FLAG_APPLY_ACTION_TO_PACKET
#define PACKET_ALERT_FLAG_APPLY_ACTION_TO_PACKET
Definition: decode.h:280
PacketAlertFinalize
void PacketAlertFinalize(const DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, Packet *p)
Check the threshold of the sigs that match, set actions, break on pass action This function iterate t...
Definition: detect-engine-alert.c:578
DETECT_ENGINE_INSPECT_SIG_CANT_MATCH
#define DETECT_ENGINE_INSPECT_SIG_CANT_MATCH
Definition: detect-engine-state.h:39
DETECT_ENGINE_STATE_FLAG_FILE_NEW
#define DETECT_ENGINE_STATE_FLAG_FILE_NEW
Definition: detect-engine-state.h:70
Flow_::flowvar
GenericVar * flowvar
Definition: flow.h:489
PKT_DROP_REASON_DEFAULT_PACKET_POLICY
@ PKT_DROP_REASON_DEFAULT_PACKET_POLICY
Definition: decode.h:398
RuleMatchCandidateTx::flags
uint32_t * flags
Definition: detect.h:1200
PACKET_ALERT_FLAG_FRAME
#define PACKET_ALERT_FLAG_FRAME
Definition: decode.h:276
Frame::flags
uint8_t flags
Definition: app-layer-frames.h:47
DetectEngineAppInspectionEngine_::alproto
AppProto alproto
Definition: detect.h:417
SCRealloc
#define SCRealloc(ptr, sz)
Definition: util-mem.h:50
detect-engine-analyzer.h
FLOWFILE_NO_SHA256_TC
#define FLOWFILE_NO_SHA256_TC
Definition: flow.h:146
DetectEngineStateDirection_::head
DeStateStore * head
Definition: detect-engine-state.h:83
DETECT_ENGINE_INSPECT_SIG_MATCH_MORE_FILES
#define DETECT_ENGINE_INSPECT_SIG_MATCH_MORE_FILES
Definition: detect-engine-state.h:49
DetectProto_::flags
uint8_t flags
Definition: detect-engine-proto.h:37
DETECT_PROTO_IPV4
#define DETECT_PROTO_IPV4
Definition: detect-engine-proto.h:31
app-layer-frames.h
DetectAddressMatchIPv6
int DetectAddressMatchIPv6(const DetectMatchAddressIPv6 *addrs, uint16_t addrs_cnt, const Address *a)
Match a packets address against a signatures addrs array.
Definition: detect-engine-address.c:1622
Packet_::tenant_id
uint32_t tenant_id
Definition: decode.h:665
Packet_::flow
struct Flow_ * flow
Definition: decode.h:546
DetectEngineStateResetTxs
void DetectEngineStateResetTxs(Flow *f)
Reset de state for active tx' To be used on detect engine reload.
Definition: detect-engine-state.c:260
DetectEngineAppInspectionEngine_::v2
struct DetectEngineAppInspectionEngine_::@90 v2
FLOWFILE_NO_MAGIC_TC
#define FLOWFILE_NO_MAGIC_TC
Definition: flow.h:131
flags
uint8_t flags
Definition: decode-gre.h:0
Signature_::proto
DetectProto proto
Definition: detect.h:687
suricata-common.h
SIG_FLAG_SP_ANY
#define SIG_FLAG_SP_ANY
Definition: detect.h:243
ActionScope
ActionScope
Definition: action-globals.h:42
ACTION_SCOPE_HOOK
@ ACTION_SCOPE_HOOK
Definition: action-globals.h:46
Signature_::action_scope
uint8_t action_scope
Definition: detect.h:690
packet.h
DeStateStore_
Definition: detect-engine-state.h:77
ACTION_DROP
#define ACTION_DROP
Definition: action-globals.h:30
DetectTransaction_
Definition: detect-engine-prefilter.h:31
Packet_::app_update_direction
uint8_t app_update_direction
Definition: decode.h:535
PROF_DETECT_SETUP
@ PROF_DETECT_SETUP
Definition: suricata-common.h:457
DetectEngineStateDirection_
Definition: detect-engine-state.h:82
DetectEngineThreadCtx_::frame_inspect_progress
uint64_t frame_inspect_progress
Definition: detect.h:1322
DetectEngineCtx_::profile_match_logging_threshold
uint32_t profile_match_logging_threshold
Definition: detect.h:1049
FLOW_TS_APP_UPDATED
#define FLOW_TS_APP_UPDATED
Definition: flow.h:119
AppLayerParserGetTxData
AppLayerTxData * AppLayerParserGetTxData(uint8_t ipproto, AppProto alproto, void *tx)
Definition: app-layer-parser.c:1183
FatalError
#define FatalError(...)
Definition: util-debug.h:510
TcpSession_::client
TcpStream client
Definition: stream-tcp-private.h:297
FLOWFILE_NO_STORE_TC
#define FLOWFILE_NO_STORE_TC
Definition: flow.h:135
tv
ThreadVars * tv
Definition: fuzz_decodepcapfile.c:32
DetectEngineAppInspectionEngine_::progress
int16_t progress
Definition: detect.h:426
FLOW_ACTION_ACCEPT
#define FLOW_ACTION_ACCEPT
Definition: flow.h:62
util-validate.h
DetectTransaction_::tx_ptr
void * tx_ptr
Definition: detect-engine-prefilter.h:32
Signature_::addr_src_match6_cnt
uint16_t addr_src_match6_cnt
Definition: detect.h:696
StreamReassembleRawUpdateProgress
void StreamReassembleRawUpdateProgress(TcpSession *ssn, Packet *p, const uint64_t progress)
update stream engine after detection
Definition: stream-tcp-reassemble.c:1558
StatsAddUI64
void StatsAddUI64(ThreadVars *tv, uint16_t id, uint64_t x)
Adds a value of type uint64_t to the local counter.
Definition: counters.c:146
FLOWFILE_NO_SHA1_TS
#define FLOWFILE_NO_SHA1_TS
Definition: flow.h:141
PROF_DETECT_RULES
@ PROF_DETECT_RULES
Definition: suricata-common.h:460
APP_LAYER_TX_INSPECTED_TS
#define APP_LAYER_TX_INSPECTED_TS
Definition: app-layer-parser.h:70
DetectRunScratchpad::app_decoder_events
const bool app_decoder_events
Definition: detect.c:72
TcpSession_::server
TcpStream server
Definition: stream-tcp-private.h:296
Signature_::dp
DetectPort * dp
Definition: detect.h:719
PacketAlerts_::suppressed
uint16_t suppressed
Definition: decode.h:289
PACKET_PROFILING_DETECT_START
#define PACKET_PROFILING_DETECT_START(p, id)
Definition: util-profiling.h:214
Signature_::iid
SigIntId iid
Definition: detect.h:680
FLOW_SGH_TOSERVER
#define FLOW_SGH_TOSERVER
Definition: flow.h:73
APP_LAYER_TX_ACCEPT
#define APP_LAYER_TX_ACCEPT
Definition: app-layer-parser.h:73
DetectEngineThreadCtx_::counter_alerts
uint16_t counter_alerts
Definition: detect.h:1289
SCFree
#define SCFree(p)
Definition: util-mem.h:61
Packet_::pkt_src
uint8_t pkt_src
Definition: decode.h:611
SGH_PROFILING_RECORD
#define SGH_PROFILING_RECORD(det_ctx, sgh)
Definition: util-profiling.h:252
Signature_::addr_dst_match6
DetectMatchAddressIPv6 * addr_dst_match6
Definition: detect.h:710
Flow_::alstate
void * alstate
Definition: flow.h:479
Signature_::id
uint32_t id
Definition: detect.h:713
DeStateStore_::store
DeStateStoreItem store[DE_STATE_CHUNK_SIZE]
Definition: detect-engine-state.h:78
DetectEngineCtx_::guess_applayer_log_limit
uint8_t guess_applayer_log_limit
Definition: detect.h:976
Flow_::flags
uint32_t flags
Definition: flow.h:421
RuleMatchCandidateTx::stream_reset
uint32_t stream_reset
Definition: detect.h:1206
ACTION_SCOPE_PACKET
@ ACTION_SCOPE_PACKET
Definition: action-globals.h:44
detect-engine-iponly.h
Signature_
Signature container.
Definition: detect.h:668
PACKET_ALERT_FLAG_TX
#define PACKET_ALERT_FLAG_TX
Definition: decode.h:272
ALPROTO_UNKNOWN
@ ALPROTO_UNKNOWN
Definition: app-layer-protos.h:29
TRACE_SID_TXS
#define TRACE_SID_TXS(sid, txs,...)
Definition: detect.c:1149
FLOW_PKT_ESTABLISHED
#define FLOW_PKT_ESTABLISHED
Definition: flow.h:235
DetectEngineThreadCtx_::tx_id_set
bool tx_id_set
Definition: detect.h:1318
PacketDrop
void PacketDrop(Packet *p, const uint8_t action, enum PacketDropReason r)
issue drop action
Definition: packet.c:33
ACTION_ACCEPT
#define ACTION_ACCEPT
Definition: action-globals.h:36
STREAMTCP_FLAG_APP_LAYER_DISABLED
#define STREAMTCP_FLAG_APP_LAYER_DISABLED
Definition: stream-tcp-private.h:201
DetectRunScratchpad::flow_flags
const uint8_t flow_flags
Definition: detect.c:71
DetectEngineThreadCtx_::de_ctx
DetectEngineCtx * de_ctx
Definition: detect.h:1364
suricata.h
IPOnlyMatchPacket
void IPOnlyMatchPacket(ThreadVars *tv, const DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const DetectEngineIPOnlyCtx *io_ctx, Packet *p)
Match a packet against the IP Only detection engine contexts.
Definition: detect-engine-iponly.c:998
DetectEngineCtx_::sig_array
Signature ** sig_array
Definition: detect.h:950
Packet_::dst
Address dst
Definition: decode.h:506
PROF_DETECT_TX
@ PROF_DETECT_TX
Definition: suricata-common.h:461
DetectEngineAppInspectionEngine_::dir
uint8_t dir
Definition: detect.h:418
PKT_NOPACKET_INSPECTION
#define PKT_NOPACKET_INSPECTION
Definition: decode.h:1245
PrefilterPostRuleMatch
void PrefilterPostRuleMatch(DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, Packet *p, Flow *f)
invoke post-rule match "prefilter" engines
Definition: detect-engine-prefilter.c:193
DetectGetInnerTx
void * DetectGetInnerTx(void *tx_ptr, AppProto alproto, AppProto engine_alproto, uint8_t flow_flags)
Definition: detect.c:1153
DetectPreStream
uint8_t DetectPreStream(ThreadVars *tv, DetectEngineThreadCtx *det_ctx, Packet *p)
Definition: detect.c:2322
DetectRunScratchpad::alproto
const AppProto alproto
Definition: detect.c:70
DE_STATE_FLAG_FULL_INSPECT
#define DE_STATE_FLAG_FULL_INSPECT
Definition: detect-engine-state.h:55
STREAMTCP_STREAM_FLAG_DISABLE_RAW
#define STREAMTCP_STREAM_FLAG_DISABLE_RAW
Definition: stream-tcp-private.h:238
DetectEngineThreadCtx_::json_content_len
uint8_t json_content_len
Definition: detect.h:1283
DetectEngineThreadCtx_::mt_det_ctxs_cnt
uint32_t mt_det_ctxs_cnt
Definition: detect.h:1254
AppLayerGetTxIteratorFunc
AppLayerGetTxIterTuple(* AppLayerGetTxIteratorFunc)(const uint8_t ipproto, const AppProto alproto, void *alstate, uint64_t min_tx_id, uint64_t max_tx_id, AppLayerGetTxIterState *state)
tx iterator prototype
Definition: app-layer-parser.h:143
likely
#define likely(expr)
Definition: util-optimize.h:32
IPPROTO_SCTP
#define IPPROTO_SCTP
Definition: decode.h:1226
DE_STATE_FLAG_FILE_INSPECT
#define DE_STATE_FLAG_FILE_INSPECT
Definition: detect-engine-state.h:60
id
uint32_t id
Definition: detect-flowbits.c:938
DetectEngineCtx_::io_ctx
DetectEngineIPOnlyCtx io_ctx
Definition: detect.h:970
SC_ATOMIC_GET
#define SC_ATOMIC_GET(name)
Get the value from the atomic variable.
Definition: util-atomic.h:375
Signature_::addr_dst_match4
DetectMatchAddressIPv4 * addr_dst_match4
Definition: detect.h:707
FlowGetDisruptionFlags
uint8_t FlowGetDisruptionFlags(const Flow *f, uint8_t flags)
get 'disruption' flags: GAP/DEPTH/PASS
Definition: flow.c:1141
TcpSession_
Definition: stream-tcp-private.h:283
flow.h
Signature_::addr_src_match4_cnt
uint16_t addr_src_match4_cnt
Definition: detect.h:694
SigIntId
#define SigIntId
Definition: suricata-common.h:332
DeStateStoreItem_
Definition: detect-engine-state.h:72
GenericVarFree
void GenericVarFree(GenericVar *gv)
Definition: util-var.c:48
Signature_::addr_dst_match4_cnt
uint16_t addr_dst_match4_cnt
Definition: detect.h:693
Flow_::alproto
AppProto alproto
application level protocol
Definition: flow.h:450
Packet_::dp
Port dp
Definition: decode.h:516
SCCalloc
#define SCCalloc(nm, sz)
Definition: util-mem.h:53
DetectEngineCtx_::sig_array_len
uint32_t sig_array_len
Definition: detect.h:951
SIG_GROUP_HEAD_HAVEFILESHA256
#define SIG_GROUP_HEAD_HAVEFILESHA256
Definition: detect.h:1495
Signature_::type
enum SignatureType type
Definition: detect.h:671
SigGroupHead_::filestore_cnt
uint16_t filestore_cnt
Definition: detect.h:1635
AppLayerParserGetTxCnt
uint64_t AppLayerParserGetTxCnt(const Flow *f, void *alstate)
Definition: app-layer-parser.c:1102
AppLayerParserHasDecoderEvents
bool AppLayerParserHasDecoderEvents(AppLayerParserState *pstate)
Definition: app-layer-parser.c:1513
FLOW_PKT_TOSERVER_FIRST
#define FLOW_PKT_TOSERVER_FIRST
Definition: flow.h:236
DetectEngineLookupFlow_::tcp
DetectPort * tcp
Definition: detect.h:862
DEBUG_VALIDATE_BUG_ON
#define DEBUG_VALIDATE_BUG_ON(exp)
Definition: util-validate.h:102
detect-engine-address.h
Flow_::tenant_id
uint32_t tenant_id
Definition: flow.h:416
Packet_::src
Address src
Definition: decode.h:505
DetectEngineThreadCtx_::counter_mpm_list
uint16_t counter_mpm_list
Definition: detect.h:1295
SigMatchSignaturesGetSgh
const SigGroupHead * SigMatchSignaturesGetSgh(const DetectEngineCtx *de_ctx, const Packet *p)
Get the SigGroupHead for a packet.
Definition: detect.c:282
DetectRunPrefilterTx
void DetectRunPrefilterTx(DetectEngineThreadCtx *det_ctx, const SigGroupHead *sgh, Packet *p, const uint8_t ipproto, const uint8_t flow_flags, const AppProto alproto, void *alstate, DetectTransaction *tx)
run prefilter engines on a transaction
Definition: detect-engine-prefilter.c:95
RuleMatchCandidateTxArrayInit
void RuleMatchCandidateTxArrayInit(DetectEngineThreadCtx *det_ctx, uint32_t size)
Definition: detect.c:1073
APP_LAYER_TX_INSPECTED_TC
#define APP_LAYER_TX_INSPECTED_TC
Definition: app-layer-parser.h:71
SIG_FLAG_DP_ANY
#define SIG_FLAG_DP_ANY
Definition: detect.h:244
DetectPortLookupGroup
DetectPort * DetectPortLookupGroup(DetectPort *dp, uint16_t port)
Function that find the group matching port in a group head.
Definition: detect-engine-port.c:613
DetectEngineThreadCtx_::post_rule_work_queue
PostRuleMatchWorkQueue post_rule_work_queue
Definition: detect.h:1347
PKT_STREAM_EST
#define PKT_STREAM_EST
Definition: decode.h:1260
detect-engine-threshold.h
APP_LAYER_TX_SKIP_INSPECT_TS
#define APP_LAYER_TX_SKIP_INSPECT_TS
Definition: app-layer-parser.h:67
Signature_::mask
SignatureMask mask
Definition: detect.h:679
app-layer.h
RuleMatchCandidateTx
Definition: detect.h:1198
DetectEngineThreadCtx_::TenantGetId
uint32_t(* TenantGetId)(const void *, const Packet *p)
Definition: detect.h:1261
PrefilterRuleStore_::rule_id_array
SigIntId * rule_id_array
Definition: util-prefilter.h:38
PacketEngineEvents_::cnt
uint8_t cnt
Definition: decode.h:307
Flow_::de_ctx_version
uint32_t de_ctx_version
Definition: flow.h:464
DetectProtoContainsProto
int DetectProtoContainsProto(const DetectProto *dp, int proto)
see if a DetectProto contains a certain proto
Definition: detect-engine-proto.c:135
DetectEngineThreadCtx_::match_array
Signature ** match_array
Definition: detect.h:1335