suricata
detect-http-client-body.c
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1 /* Copyright (C) 2007-2021 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  * \ingroup httplayer
20  *
21  * @{
22  */
23 
24 
25 /**
26  * \file
27  *
28  * \author Anoop Saldanha <anoopsaldanha@gmail.com>
29  *
30  * Implements support for the http_client_body keyword
31  */
32 
33 #include "suricata-common.h"
34 #include "threads.h"
35 #include "decode.h"
36 
37 #include "detect.h"
38 #include "detect-parse.h"
39 #include "detect-engine.h"
40 #include "detect-engine-buffer.h"
41 #include "detect-engine-mpm.h"
42 #include "detect-engine-state.h"
45 #include "detect-content.h"
46 #include "detect-pcre.h"
47 // PrefilterMpmFiledata
48 #include "detect-file-data.h"
49 
50 #include "flow.h"
51 #include "flow-var.h"
52 #include "flow-util.h"
53 
54 #include "util-debug.h"
55 #include "util-unittest.h"
56 #include "util-unittest-helper.h"
57 #include "util-spm.h"
58 
59 #include "app-layer.h"
60 #include "app-layer-parser.h"
61 #include "app-layer-htp.h"
63 #include "stream-tcp.h"
64 #include "util-profiling.h"
65 
66 static int DetectHttpClientBodySetup(DetectEngineCtx *, Signature *, const char *);
67 static int DetectHttpClientBodySetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str);
68 #ifdef UNITTESTS
69 static void DetectHttpClientBodyRegisterTests(void);
70 #endif
71 static void DetectHttpClientBodySetupCallback(const DetectEngineCtx *de_ctx,
72  Signature *s);
73 static int g_http_client_body_buffer_id = 0;
74 
75 static uint8_t DetectEngineInspectBufferHttpBody(DetectEngineCtx *de_ctx,
77  const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id);
78 
79 static int PrefilterMpmHttpRequestBodyRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
80  MpmCtx *mpm_ctx, const DetectBufferMpmRegistry *mpm_reg, int list_id);
81 
82 /**
83  * \brief Registers the keyword handlers for the "http_client_body" keyword.
84  */
86 {
87  /* http_client_body content modifier */
88  sigmatch_table[DETECT_HTTP_CLIENT_BODY].name = "http_client_body";
90  "content modifier to match only on HTTP request-body";
91  sigmatch_table[DETECT_HTTP_CLIENT_BODY].url = "/rules/http-keywords.html#http-client-body";
92  sigmatch_table[DETECT_HTTP_CLIENT_BODY].Setup = DetectHttpClientBodySetup;
93 #ifdef UNITTESTS
95 #endif
99 
100  /* http.request_body sticky buffer */
101  sigmatch_table[DETECT_HTTP_REQUEST_BODY].name = "http.request_body";
102  sigmatch_table[DETECT_HTTP_REQUEST_BODY].desc = "sticky buffer to match the HTTP request body buffer";
103  sigmatch_table[DETECT_HTTP_REQUEST_BODY].url = "/rules/http-keywords.html#http-client-body";
104  sigmatch_table[DETECT_HTTP_REQUEST_BODY].Setup = DetectHttpClientBodySetupSticky;
107 
109  HTP_REQUEST_PROGRESS_BODY, DetectEngineInspectBufferHttpBody, NULL);
110 
111  DetectAppLayerMpmRegister("http_client_body", SIG_FLAG_TOSERVER, 2,
112  PrefilterMpmHttpRequestBodyRegister, NULL, ALPROTO_HTTP1, HTP_REQUEST_PROGRESS_BODY);
113 
115  HTTP2StateDataClient, DetectEngineInspectFiledata, NULL);
116  DetectAppLayerMpmRegister("http_client_body", SIG_FLAG_TOSERVER, 2,
117  PrefilterMpmFiledataRegister, NULL, ALPROTO_HTTP2, HTTP2StateDataClient);
118 
119  DetectBufferTypeSetDescriptionByName("http_client_body",
120  "http request body");
121 
122  DetectBufferTypeRegisterSetupCallback("http_client_body",
123  DetectHttpClientBodySetupCallback);
124 
125  g_http_client_body_buffer_id = DetectBufferTypeGetByName("http_client_body");
126 }
127 
128 static void DetectHttpClientBodySetupCallback(const DetectEngineCtx *de_ctx,
129  Signature *s)
130 {
131  SCLogDebug("callback invoked by %u", s->id);
133 
134  /* client body needs to be inspected in sync with stream if possible */
136 }
137 
138 /**
139  * \brief The setup function for the http_client_body keyword for a signature.
140  *
141  * \param de_ctx Pointer to the detection engine context.
142  * \param s Pointer to signature for the current Signature being parsed
143  * from the rules.
144  * \param m Pointer to the head of the SigMatchs for the current rule
145  * being parsed.
146  * \param arg Pointer to the string holding the keyword value.
147  *
148  * \retval 0 On success
149  * \retval -1 On failure
150  */
151 int DetectHttpClientBodySetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
152 {
154  de_ctx, s, arg, DETECT_HTTP_CLIENT_BODY, g_http_client_body_buffer_id, ALPROTO_HTTP1);
155 }
156 
157 /**
158  * \brief this function setup the http.request_body keyword used in the rule
159  *
160  * \param de_ctx Pointer to the Detection Engine Context
161  * \param s Pointer to the Signature to which the current keyword belongs
162  * \param str Should hold an empty string always
163  *
164  * \retval 0 On success
165  */
166 static int DetectHttpClientBodySetupSticky(DetectEngineCtx *de_ctx, Signature *s, const char *str)
167 {
168  if (SCDetectBufferSetActiveList(de_ctx, s, g_http_client_body_buffer_id) < 0)
169  return -1;
171  return -1;
172  // we cannot use a transactional rule with a fast pattern to client and this
174  SCLogError("fast_pattern cannot be used on to_client keyword for "
175  "transactional rule with a streaming buffer to server %u",
176  s->id);
177  return -1;
178  }
180  return 0;
181 }
182 
183 static inline HtpBody *GetRequestBody(htp_tx_t *tx)
184 {
185  HtpTxUserData *htud = (HtpTxUserData *)htp_tx_get_user_data(tx);
186  return &htud->request_body;
187 }
188 
190  int list_id;
192  const MpmCtx *mpm_ctx;
195 
196 static void PrefilterMpmHttpRequestBodyFree(void *ptr)
197 {
198  SCFree(ptr);
199 }
200 
201 static inline InspectionBuffer *HttpRequestBodyXformsGetDataCallback(DetectEngineThreadCtx *det_ctx,
202  const DetectEngineTransforms *transforms, const int list_id, InspectionBuffer *base_buffer)
203 {
204  InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
205  if (buffer->inspect != NULL)
206  return buffer;
207 
208  InspectionBufferSetup(det_ctx, list_id, buffer, base_buffer->inspect, base_buffer->inspect_len);
209  buffer->inspect_offset = base_buffer->inspect_offset;
210  InspectionBufferApplyTransforms(det_ctx, buffer, transforms);
211  SCLogDebug("xformed buffer %p size %u", buffer, buffer->inspect_len);
212  SCReturnPtr(buffer, "InspectionBuffer");
213 }
214 
215 static InspectionBuffer *HttpRequestBodyGetDataCallback(DetectEngineThreadCtx *det_ctx,
216  const DetectEngineTransforms *transforms, Flow *f, const uint8_t flow_flags, void *txv,
217  const int list_id, const int base_id)
218 {
219  SCEnter();
220 
221  InspectionBuffer *buffer = InspectionBufferGet(det_ctx, base_id);
222  if (base_id != list_id && buffer->inspect != NULL)
223  return HttpRequestBodyXformsGetDataCallback(det_ctx, transforms, list_id, buffer);
224  else if (buffer->inspect != NULL)
225  return buffer;
226 
227  htp_tx_t *tx = txv;
228  HtpState *htp_state = f->alstate;
229  const uint8_t flags = flow_flags;
230 
231  HtpBody *body = GetRequestBody(tx);
232  if (body == NULL) {
233  return NULL;
234  }
235 
236  /* no new data */
237  if (body->body_inspected == body->content_len_so_far) {
238  SCLogDebug("no new data");
239  return NULL;
240  }
241 
242  HtpBodyChunk *cur = body->first;
243  if (cur == NULL) {
244  SCLogDebug("No http chunks to inspect for this transaction");
245  return NULL;
246  }
247 
248  SCLogDebug("request.body_limit %u request_body.content_len_so_far %" PRIu64
249  ", request.inspect_min_size %" PRIu32 ", EOF %s, progress > body? %s",
250  htp_state->cfg->request.body_limit, body->content_len_so_far,
251  htp_state->cfg->request.inspect_min_size, flags & STREAM_EOF ? "true" : "false",
253  HTP_REQUEST_PROGRESS_BODY)
254  ? "true"
255  : "false");
256 
257  if (!htp_state->cfg->http_body_inline) {
258  /* inspect the body if the transfer is complete or we have hit
259  * our body size limit */
260  if ((htp_state->cfg->request.body_limit == 0 ||
261  body->content_len_so_far < htp_state->cfg->request.body_limit) &&
262  body->content_len_so_far < htp_state->cfg->request.inspect_min_size &&
263  !(AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, tx, flags) >
264  HTP_REQUEST_PROGRESS_BODY) &&
265  !(flags & STREAM_EOF)) {
266  SCLogDebug("we still haven't seen the entire request body. "
267  "Let's defer body inspection till we see the "
268  "entire body.");
269  return NULL;
270  }
271  }
272 
273  /* get the inspect buffer
274  *
275  * make sure that we have at least the configured inspect_win size.
276  * If we have more, take at least 1/4 of the inspect win size before
277  * the new data.
278  */
279  uint64_t offset = 0;
280  if (body->body_inspected > htp_state->cfg->request.inspect_min_size) {
282  uint64_t inspect_win = body->content_len_so_far - body->body_inspected;
283  SCLogDebug("inspect_win %"PRIu64, inspect_win);
284  if (inspect_win < htp_state->cfg->request.inspect_window) {
285  uint64_t inspect_short = htp_state->cfg->request.inspect_window - inspect_win;
286  if (body->body_inspected < inspect_short)
287  offset = 0;
288  else
289  offset = body->body_inspected - inspect_short;
290  } else {
291  offset = body->body_inspected - (htp_state->cfg->request.inspect_window / 4);
292  }
293  }
294 
295  const uint8_t *data;
296  uint32_t data_len;
297 
299  &data, &data_len, offset);
300  InspectionBufferSetup(det_ctx, base_id, buffer, data, data_len);
301  buffer->inspect_offset = offset;
302  body->body_inspected = body->content_len_so_far;
303  SCLogDebug("body->body_inspected now: %" PRIu64, body->body_inspected);
304 
305  if (base_id != list_id) {
306  buffer = HttpRequestBodyXformsGetDataCallback(det_ctx, transforms, list_id, buffer);
307  }
308  SCReturnPtr(buffer, "InspectionBuffer");
309 }
310 
311 static uint8_t DetectEngineInspectBufferHttpBody(DetectEngineCtx *de_ctx,
313  const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id)
314 {
315  bool eof =
316  (AppLayerParserGetStateProgress(f->proto, f->alproto, txv, flags) > engine->progress);
317  const InspectionBuffer *buffer = HttpRequestBodyGetDataCallback(
318  det_ctx, engine->v2.transforms, f, flags, txv, engine->sm_list, engine->sm_list_base);
319  if (buffer == NULL || buffer->inspect == NULL) {
320  if (eof && engine->match_on_null) {
322  }
324  }
325 
326  const uint32_t data_len = buffer->inspect_len;
327  const uint8_t *data = buffer->inspect;
328  const uint64_t offset = buffer->inspect_offset;
329 
330  uint8_t ci_flags = eof ? DETECT_CI_FLAGS_END : 0;
331  ci_flags |= (offset == 0 ? DETECT_CI_FLAGS_START : 0);
332  ci_flags |= buffer->flags;
333 
334  /* Inspect all the uricontents fetched on each
335  * transaction at the app layer */
336  const bool match = DetectEngineContentInspection(de_ctx, det_ctx, s, engine->smd, NULL, f, data,
338  if (match) {
340  }
341 
342  if (flags & STREAM_TOSERVER) {
343  if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, txv, flags) >
344  HTP_REQUEST_PROGRESS_BODY)
346  } else {
347  if (AppLayerParserGetStateProgress(IPPROTO_TCP, ALPROTO_HTTP1, txv, flags) >
348  HTP_RESPONSE_PROGRESS_BODY)
350  }
352 }
353 
354 /** \brief HTTP Request body callback
355  *
356  * \param det_ctx detection engine thread ctx
357  * \param pectx inspection context
358  * \param p packet to inspect
359  * \param f flow to inspect
360  * \param txv tx to inspect
361  * \param idx transaction id
362  * \param flags STREAM_* flags including direction
363  */
364 static void PrefilterTxHttpRequestBody(DetectEngineThreadCtx *det_ctx, const void *pectx, Packet *p,
365  Flow *f, void *txv, const uint64_t idx, const AppLayerTxData *_txd, const uint8_t flags)
366 {
367  SCEnter();
368 
370  const MpmCtx *mpm_ctx = ctx->mpm_ctx;
371  const int list_id = ctx->list_id;
372 
373  InspectionBuffer *buffer = HttpRequestBodyGetDataCallback(
374  det_ctx, ctx->transforms, f, flags, txv, list_id, ctx->base_list_id);
375  if (buffer == NULL)
376  return;
377 
378  if (buffer->inspect_len >= mpm_ctx->minlen) {
379  (void)mpm_table[mpm_ctx->mpm_type].Search(
380  mpm_ctx, &det_ctx->mtc, &det_ctx->pmq, buffer->inspect, buffer->inspect_len);
381  PREFILTER_PROFILING_ADD_BYTES(det_ctx, buffer->inspect_len);
382  }
383 }
384 
385 static int PrefilterMpmHttpRequestBodyRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh,
386  MpmCtx *mpm_ctx, const DetectBufferMpmRegistry *mpm_reg, int list_id)
387 {
388  PrefilterMpmHttpRequestBody *pectx = SCCalloc(1, sizeof(*pectx));
389  if (pectx == NULL)
390  return -1;
391  pectx->list_id = list_id;
392  pectx->base_list_id = mpm_reg->sm_list_base;
393  SCLogDebug("list_id %d base_list_id %d", list_id, pectx->base_list_id);
394  pectx->mpm_ctx = mpm_ctx;
395  pectx->transforms = &mpm_reg->transforms;
396 
397  return PrefilterAppendTxEngine(de_ctx, sgh, PrefilterTxHttpRequestBody, mpm_reg->app_v2.alproto,
398  mpm_reg->app_v2.tx_min_progress, pectx, PrefilterMpmHttpRequestBodyFree,
399  mpm_reg->pname);
400 }
401 
402 #ifdef UNITTESTS
403 #include "detect-engine-alert.h"
405 #endif /* UNITTESTS */
406 
407 /**
408  * @}
409  */
HtpState_::cfg
const struct HTPCfgRec_ * cfg
Definition: app-layer-htp.h:188
DetectEngineAppInspectionEngine_
Definition: detect.h:437
SigTableElmt_::url
const char * url
Definition: detect.h:1431
DetectSignatureSetAppProto
int DetectSignatureSetAppProto(Signature *s, AppProto alproto)
Definition: detect-parse.c:2313
detect-content.h
MpmCtx_::mpm_type
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Definition: util-mpm.h:95
detect-engine.h
SIGMATCH_INFO_STICKY_BUFFER
#define SIGMATCH_INFO_STICKY_BUFFER
Definition: detect.h:1645
SigTableElmt_::desc
const char * desc
Definition: detect.h:1430
sigmatch_table
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Definition: detect-parse.c:155
offset
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Definition: util-streaming-buffer.h:0
DETECT_CI_FLAGS_START
#define DETECT_CI_FLAGS_START
Definition: detect-engine-content-inspection.h:40
flow-util.h
SIGMATCH_INFO_CONTENT_MODIFIER
#define SIGMATCH_INFO_CONTENT_MODIFIER
Definition: detect.h:1643
SigTableElmt_::name
const char * name
Definition: detect.h:1428
stream-tcp.h
SigGroupHead_
Container for matching data for a signature group.
Definition: detect.h:1598
DetectHttpClientBodyRegisterTests
void DetectHttpClientBodyRegisterTests(void)
Definition: detect-http-client-body.c:2850
HtpBody_::sb
StreamingBuffer * sb
Definition: app-layer-htp.h:134
DetectEngineTransforms
Definition: detect.h:415
DetectBufferMpmRegistry_::sm_list_base
int16_t sm_list_base
Definition: detect.h:769
SIG_FLAG_INIT_NEED_FLUSH
#define SIG_FLAG_INIT_NEED_FLUSH
Definition: detect.h:296
PrefilterMpmHttpRequestBody::list_id
int list_id
Definition: detect-http-client-body.c:190
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:269
HTPCfgDir_::body_limit
uint32_t body_limit
Definition: app-layer-htp.h:95
SIG_FLAG_INIT_TXDIR_FAST_TOCLIENT
#define SIG_FLAG_INIT_TXDIR_FAST_TOCLIENT
Definition: detect.h:305
Flow_::proto
uint8_t proto
Definition: flow.h:378
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:1086
InspectionBuffer
Definition: detect.h:380
threads.h
Flow_
Flow data structure.
Definition: flow.h:356
DetectBufferTypeRegisterSetupCallback
void DetectBufferTypeRegisterSetupCallback(const char *name, void(*SetupCallback)(const DetectEngineCtx *, Signature *))
Definition: detect-engine.c:1351
DetectEngineThreadCtx_::pmq
PrefilterRuleStore pmq
Definition: detect.h:1324
SigTableElmt_::flags
uint16_t flags
Definition: detect.h:1422
ctx
struct Thresholds ctx
DetectEngineCtx_
main detection engine ctx
Definition: detect.h:931
PrefilterMpmFiledataRegister
int PrefilterMpmFiledataRegister(DetectEngineCtx *de_ctx, SigGroupHead *sgh, MpmCtx *mpm_ctx, const DetectBufferMpmRegistry *mpm_reg, int list_id)
Definition: detect-file-data.c:502
DetectEngineAppInspectionEngine_::v2
struct DetectEngineAppInspectionEngine_::@79 v2
HtpTxUserData_::request_body
HtpBody request_body
Definition: app-layer-htp.h:164
detect-http-client-body.h
DetectBufferMpmRegistry_
one time registration of keywords at start up
Definition: detect.h:764
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DetectEngineAppInspectionEngine_::sm_list_base
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Definition: detect.h:446
InspectionBuffer::flags
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Definition: detect.h:385
SCDetectBufferSetActiveList
int SCDetectBufferSetActiveList(DetectEngineCtx *de_ctx, Signature *s, const int list)
Definition: detect-engine-buffer.c:29
SignatureInitData_::init_flags
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Definition: detect.h:610
StreamingBufferGetDataAtOffset
int StreamingBufferGetDataAtOffset(const StreamingBuffer *sb, const uint8_t **data, uint32_t *data_len, uint64_t offset)
Definition: util-streaming-buffer.c:1830
SigTableElmt_::Setup
int(* Setup)(DetectEngineCtx *, Signature *, const char *)
Definition: detect.h:1413
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DetectBufferMpmRegistry_::transforms
DetectEngineTransforms transforms
Definition: detect.h:777
detect-engine-prefilter.h
PrefilterMpmHttpRequestBody
struct PrefilterMpmHttpRequestBody PrefilterMpmHttpRequestBody
HTPCfgDir_::inspect_window
uint32_t inspect_window
Definition: app-layer-htp.h:97
util-unittest.h
InspectionBufferGet
InspectionBuffer * InspectionBufferGet(DetectEngineThreadCtx *det_ctx, const int list_id)
Definition: detect-engine.c:1429
HtpBody_::first
HtpBodyChunk * first
Definition: app-layer-htp.h:131
DETECT_HTTP_REQUEST_BODY
@ DETECT_HTTP_REQUEST_BODY
Definition: detect-engine-register.h:157
HtpState_
Definition: app-layer-htp.h:181
util-unittest-helper.h
PrefilterMpmHttpRequestBody
Definition: detect-http-client-body.c:189
DetectBufferTypeGetByName
int DetectBufferTypeGetByName(const char *name)
Definition: detect-engine.c:1157
HtpBody_::content_len_so_far
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Definition: app-layer-htp.h:137
DetectEngineAppInspectionEngine_::sm_list
uint16_t sm_list
Definition: detect.h:445
SIG_FLAG_TOSERVER
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Definition: detect.h:270
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decode.h
util-debug.h
HTPCfgRec_::http_body_inline
int http_body_inline
Definition: app-layer-htp.h:108
de_ctx
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Definition: fuzz_siginit.c:18
PrefilterMpmHttpRequestBody::transforms
const DetectEngineTransforms * transforms
Definition: detect-http-client-body.c:193
DetectEngineThreadCtx_
Definition: detect.h:1223
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uint32_t inspect_min_size
Definition: app-layer-htp.h:96
AppLayerHtpEnableRequestBodyCallback
void AppLayerHtpEnableRequestBodyCallback(void)
Sets a flag that informs the HTP app layer that some module in the engine needs the http request body...
Definition: app-layer-htp.c:551
SCEnter
#define SCEnter(...)
Definition: util-debug.h:271
detect-engine-mpm.h
detect-http-client-body.c
Handle HTTP request body match corresponding to http_client_body keyword.
detect.h
DETECT_ENGINE_INSPECT_SIG_MATCH
#define DETECT_ENGINE_INSPECT_SIG_MATCH
Definition: detect-engine-state.h:38
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struct DetectBufferMpmRegistry_::@87::@89 app_v2
InspectionBuffer::inspect_offset
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Definition: detect.h:382
DETECT_ENGINE_CONTENT_INSPECTION_MODE_STATE
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Definition: detect-engine-content-inspection.h:36
SigTableElmt_::alternative
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Definition: detect.h:1426
DetectAppLayerMpmRegister
void DetectAppLayerMpmRegister(const char *name, int direction, int priority, PrefilterRegisterFunc PrefilterRegister, InspectionBufferGetDataPtr GetData, AppProto alproto, int tx_min_progress)
register an app layer keyword for mpm
Definition: detect-engine-mpm.c:151
app-layer-parser.h
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Definition: util-mpm.h:104
BUG_ON
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Definition: suricata-common.h:317
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DetectEngineContentModifierBufferSetup
int DetectEngineContentModifierBufferSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg, int sm_type, int sm_list, AppProto alproto)
Definition: detect-parse.c:222
Packet_
Definition: decode.h:492
DETECT_CI_FLAGS_END
#define DETECT_CI_FLAGS_END
Definition: detect-engine-content-inspection.h:42
detect-engine-alert.h
DetectEngineAppInspectionEngine_::match_on_null
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Definition: detect.h:444
Signature_::init_data
SignatureInitData * init_data
Definition: detect.h:749
SCReturnPtr
#define SCReturnPtr(x, type)
Definition: util-debug.h:287
detect-engine-state.h
Data structures and function prototypes for keeping state for the detection engine.
ALPROTO_HTTP2
@ ALPROTO_HTTP2
Definition: app-layer-protos.h:69
MpmTableElmt_::Search
uint32_t(* Search)(const struct MpmCtx_ *, struct MpmThreadCtx_ *, PrefilterRuleStore *, const uint8_t *, uint32_t)
Definition: util-mpm.h:177
DETECT_HTTP_CLIENT_BODY
@ DETECT_HTTP_CLIENT_BODY
Definition: detect-engine-register.h:156
DETECT_ENGINE_INSPECT_SIG_CANT_MATCH
#define DETECT_ENGINE_INSPECT_SIG_CANT_MATCH
Definition: detect-engine-state.h:39
DetectEngineThreadCtx_::mtc
MpmThreadCtx mtc
Definition: detect.h:1320
detect-engine-content-inspection.h
DetectEngineAppInspectionEngine_::smd
SigMatchData * smd
Definition: detect.h:459
PrefilterMpmHttpRequestBody::base_list_id
int base_list_id
Definition: detect-http-client-body.c:191
AppLayerTxData
struct AppLayerTxData AppLayerTxData
Definition: detect.h:1494
PREFILTER_PROFILING_ADD_BYTES
#define PREFILTER_PROFILING_ADD_BYTES(det_ctx, bytes)
Definition: util-profiling.h:286
HtpBody_
Definition: app-layer-htp.h:130
flags
uint8_t flags
Definition: decode-gre.h:0
suricata-common.h
PrefilterMpmHttpRequestBody::mpm_ctx
const MpmCtx * mpm_ctx
Definition: detect-http-client-body.c:192
HTPCfgRec_::request
HTPCfgDir request
Definition: app-layer-htp.h:115
HtpBodyChunk_
Definition: app-layer-htp.h:122
ALPROTO_HTTP1
@ ALPROTO_HTTP1
Definition: app-layer-protos.h:36
DetectHttpClientBodyRegister
void DetectHttpClientBodyRegister(void)
Registers the keyword handlers for the "http_client_body" keyword.
Definition: detect-http-client-body.c:85
util-spm.h
detect-engine-buffer.h
PrefilterAppendTxEngine
int PrefilterAppendTxEngine(DetectEngineCtx *de_ctx, SigGroupHead *sgh, PrefilterTxFn PrefilterTxFunc, AppProto alproto, int tx_min_progress, void *pectx, void(*FreeFunc)(void *pectx), const char *name)
Definition: detect-engine-prefilter.c:352
HtpTxUserData_
Definition: app-layer-htp.h:151
InspectionBufferApplyTransforms
void InspectionBufferApplyTransforms(DetectEngineThreadCtx *det_ctx, InspectionBuffer *buffer, const DetectEngineTransforms *transforms)
Definition: detect-engine.c:1501
DETECT_ENGINE_INSPECT_SIG_NO_MATCH
#define DETECT_ENGINE_INSPECT_SIG_NO_MATCH
Definition: detect-engine-state.h:37
DetectEngineAppInspectionEngine_::progress
int16_t progress
Definition: detect.h:447
SIG_FLAG_INIT_TXDIR_STREAMING_TOSERVER
#define SIG_FLAG_INIT_TXDIR_STREAMING_TOSERVER
Definition: detect.h:303
InspectionBuffer::inspect_len
uint32_t inspect_len
Definition: detect.h:383
InspectionBuffer::inspect
const uint8_t * inspect
Definition: detect.h:381
str
#define str(s)
Definition: suricata-common.h:308
SCLogError
#define SCLogError(...)
Macro used to log ERROR messages.
Definition: util-debug.h:261
InspectionBufferSetup
void InspectionBufferSetup(DetectEngineThreadCtx *det_ctx, const int list_id, InspectionBuffer *buffer, const uint8_t *data, const uint32_t data_len)
setup the buffer with our initial data
Definition: detect-engine.c:1563
SCFree
#define SCFree(p)
Definition: util-mem.h:61
Flow_::alstate
void * alstate
Definition: flow.h:479
Signature_::id
uint32_t id
Definition: detect.h:715
detect-parse.h
Signature_
Signature container.
Definition: detect.h:670
DetectEngineAppInspectionEngine_::transforms
const DetectEngineTransforms * transforms
Definition: detect.h:456
ALPROTO_HTTP
@ ALPROTO_HTTP
Definition: app-layer-protos.h:75
mpm_table
MpmTableElmt mpm_table[MPM_TABLE_SIZE]
Definition: util-mpm.c:47
SIGMATCH_NOOPT
#define SIGMATCH_NOOPT
Definition: detect.h:1620
DetectAppLayerInspectEngineRegister
void DetectAppLayerInspectEngineRegister(const char *name, AppProto alproto, uint32_t dir, int progress, InspectEngineFuncPtr Callback, InspectionBufferGetDataPtr GetData)
Registers an app inspection engine.
Definition: detect-engine.c:245
DetectBufferTypeSetDescriptionByName
void DetectBufferTypeSetDescriptionByName(const char *name, const char *desc)
Definition: detect-engine.c:1254
MpmCtx_
Definition: util-mpm.h:93
flow.h
DetectEngineContentInspection
bool DetectEngineContentInspection(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const Signature *s, const SigMatchData *smd, Packet *p, Flow *f, const uint8_t *buffer, const uint32_t buffer_len, const uint32_t stream_start_offset, const uint8_t flags, const enum DetectContentInspectionType inspection_mode)
wrapper around DetectEngineContentInspectionInternal to return true/false only
Definition: detect-engine-content-inspection.c:733
Flow_::alproto
AppProto alproto
application level protocol
Definition: flow.h:450
SCCalloc
#define SCCalloc(nm, sz)
Definition: util-mem.h:53
flow-var.h
DetectEngineInspectFiledata
uint8_t DetectEngineInspectFiledata(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx, const DetectEngineAppInspectionEngine *engine, const Signature *s, Flow *f, uint8_t flags, void *alstate, void *txv, uint64_t tx_id)
Definition: detect-file-data.c:405
SigTableElmt_::RegisterTests
void(* RegisterTests)(void)
Definition: detect.h:1420
HtpBody_::body_inspected
uint64_t body_inspected
Definition: app-layer-htp.h:141
app-layer.h
DetectBufferMpmRegistry_::pname
char pname[32]
Definition: detect.h:766